/* roulang page: index */
/* ===== Design Tokens ===== */
        :root {
            --bg: #070D16;
            --bg-deep: #04080D;
            --bg-soft: #0D1624;
            --primary: #2E7CF6;
            --primary-dark: #1F52C8;
            --primary-glow: rgba(46, 124, 246, 0.35);
            --accent: #19D3DA;
            --accent-glow: rgba(25, 211, 218, 0.25);
            --text-main: #D3DFF0;
            --text-secondary: #8EA3C0;
            --text-light: #B4C8E5;
            --white: #F5F8FE;
            --warning: #E5A54B;
            --card-bg: rgba(17, 28, 43, 0.66);
            --card-border: rgba(255, 255, 255, 0.08);
            --card-border-hover: rgba(46, 124, 246, 0.5);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-pill: 999px;
            --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.28);
            --shadow-glow: 0 0 20px rgba(46, 124, 246, 0.35);
            --shadow-glow-hover: 0 0 32px rgba(46, 124, 246, 0.55);
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --font-mono: "SF Mono", Consolas, monospace;
            --nav-height: 72px;
            --container-max: 1200px;
            --gap-section-desktop: 120px;
            --gap-section-tablet: 72px;
            --gap-section-mobile: 56px;
            --transition-base: all 0.3s ease;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.85;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--accent);
        }

        img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
        }

        button,
        input {
            font-family: var(--font-main);
        }

        .container {
            max-width: var(--container-max);
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Background Decorative Elements ===== */
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image:
                repeating-linear-gradient(0deg, transparent 0px, transparent 39px, rgba(255, 255, 255, 0.03) 40px),
                repeating-linear-gradient(90deg, transparent 0px, transparent 39px, rgba(255, 255, 255, 0.02) 40px);
            pointer-events: none;
            z-index: 0;
        }

        body::after {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, rgba(7, 13, 22, 0) 0%, rgba(7, 13, 22, 0.5) 100%);
            pointer-events: none;
            z-index: 0;
        }

        .data-flow {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: repeating-linear-gradient(180deg, transparent 0px, transparent 60px, rgba(255, 255, 255, 0.045) 61px);
            pointer-events: none;
            z-index: 0;
        }

        /* ===== Header / Nav ===== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(7, 13, 22, 0.75);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition-base);
        }

        .site-nav.scrolled {
            background: rgba(4, 8, 13, 0.9);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            position: relative;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 0 14px rgba(46, 124, 246, 0.4);
            position: relative;
            overflow: hidden;
        }

        .brand-icon::after {
            content: '';
            position: absolute;
            top: -12px;
            right: -12px;
            width: 20px;
            height: 20px;
            border: 2px solid rgba(255, 255, 255, 0.25);
            border-radius: 50%;
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--white);
            letter-spacing: 0.01em;
            white-space: nowrap;
            background: linear-gradient(90deg, var(--white) 0%, var(--text-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            color: var(--text-light);
            font-size: 14px;
            font-weight: 500;
            position: relative;
            padding: 8px 0;
            letter-spacing: 0.02em;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition-base);
            box-shadow: 0 0 8px var(--primary);
        }

        .nav-links a:hover {
            color: var(--white);
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-links a.active {
            color: var(--white);
        }

        .nav-links a.active::after {
            width: 100%;
            background: var(--primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .command-search {
            position: relative;
            width: 200px;
        }

        .command-search input {
            width: 100%;
            height: 38px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-md);
            padding: 0 38px 0 36px;
            font-size: 13px;
            font-family: var(--font-main);
            color: var(--text-main);
            transition: var(--transition-base);
        }

        .command-search input::placeholder {
            color: var(--text-secondary);
        }

        .command-search input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 124, 246, 0.15);
            background: rgba(255, 255, 255, 0.08);
        }

        .command-search i {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-secondary);
            font-size: 13px;
        }

        .command-search .kbd {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            background: rgba(255, 255, 255, 0.1);
            color: var(--text-light);
            font-size: 10px;
            font-family: var(--font-mono);
            padding: 2px 6px;
            border-radius: 4px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .quick-link {
            color: var(--text-light);
            font-size: 14px;
            font-weight: 500;
            padding: 6px 10px;
            border-radius: 8px;
            transition: var(--transition-base);
        }

        .quick-link:hover {
            color: var(--white);
            background: rgba(255, 255, 255, 0.06);
        }

        .btn-login {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            border: none;
            border-radius: var(--radius-md);
            padding: 9px 20px;
            font-size: 14px;
            font-weight: 600;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-base);
        }

        .btn-login:hover {
            color: #fff;
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
        }

        .btn-login:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(46, 124, 246, 0.3);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 8px;
            padding: 8px 11px;
            color: var(--text-light);
            font-size: 18px;
            cursor: pointer;
            transition: var(--transition-base);
        }

        .nav-toggle:hover {
            color: var(--white);
            border-color: var(--primary);
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            z-index: 999;
            background: rgba(7, 13, 22, 0.97);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 24px 28px;
            transform: translateY(-12px);
            opacity: 0;
            pointer-events: none;
            transition: var(--transition-base);
        }

        .mobile-nav.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-nav .mobile-links {
            list-style: none;
            margin: 0 0 16px;
            padding: 0;
        }

        .mobile-nav .mobile-links li {
            margin-bottom: 6px;
        }

        .mobile-nav .mobile-links a {
            display: block;
            padding: 12px 14px;
            border-radius: var(--radius-md);
            color: var(--text-light);
            font-size: 15px;
            font-weight: 500;
        }

        .mobile-nav .mobile-links a:hover,
        .mobile-nav .mobile-links a.active {
            background: rgba(46, 124, 246, 0.1);
            color: var(--white);
        }

        .mobile-nav .mobile-search {
            margin-bottom: 14px;
        }

        .mobile-nav .mobile-search input {
            width: 100%;
            height: 40px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-md);
            padding: 0 14px;
            font-size: 14px;
            color: var(--text-main);
        }

        .mobile-nav .mobile-search input:focus {
            outline: none;
            border-color: var(--primary);
        }

        .mobile-nav .btn {
            width: 100%;
            text-align: center;
        }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            padding: calc(var(--nav-height) + 72px) 0 72px;
            overflow: hidden;
            min-height: 92vh;
            display: flex;
            align-items: center;
        }

        .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 1;
        }

        .hero-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, rgba(7, 13, 22, 0.3) 0%, var(--bg) 100%);
            z-index: 2;
        }

        .hero .container {
            position: relative;
            z-index: 3;
        }

        .hero-content {
            padding-right: 40px;
        }

        .hero-content .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(25, 211, 218, 0.1);
            border: 1px solid rgba(25, 211, 218, 0.2);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 24px;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .hero-content .hero-eyebrow i {
            font-size: 12px;
        }

        .hero-content h1 {
            font-size: clamp(32px, 4.2vw, 52px);
            font-weight: 700;
            line-height: 1.2;
            color: var(--white);
            margin-bottom: 20px;
            letter-spacing: 0.01em;
        }

        .hero-content h1 .gradient-text {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-sub {
            font-size: 18px;
            color: var(--text-light);
            margin-bottom: 28px;
            max-width: 520px;
            line-height: 1.7;
            font-weight: 400;
        }

        .hero-cta {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .btn {
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            transition: var(--transition-base);
            border: none;
            letter-spacing: 0.02em;
        }

        .btn-primary-custom {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            box-shadow: var(--shadow-glow);
        }

        .btn-primary-custom:hover {
            color: #fff;
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-2px);
            background: linear-gradient(135deg, #3D8BFF 0%, #2A5ED8 100%);
        }

        .btn-primary-custom:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(46, 124, 246, 0.3);
        }

        .btn-outline-custom {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-light);
            backdrop-filter: blur(8px);
        }

        .btn-outline-custom:hover {
            border-color: var(--primary);
            color: var(--white);
            background: rgba(46, 124, 246, 0.08);
            transform: translateY(-2px);
        }

        .hero-trust {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .hero-trust i {
            color: var(--accent);
            font-size: 14px;
        }

        .hero-visual {
            position: relative;
        }

        .glass-frame {
            position: relative;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: 20px;
            padding: 12px;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transform: perspective(1200px) rotateY(-4deg) rotateX(2deg);
            transition: transform 0.6s ease, box-shadow 0.6s ease;
            background:
                linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 24px 24px;
            background-color: rgba(17, 28, 43, 0.7);
        }

        .glass-frame:hover {
            transform: perspective(1200px) rotateY(0deg) rotateX(0deg);
            box-shadow: 0 20px 48px rgba(0, 0, 0, 0.4);
        }

        .glass-frame .frame-glow {
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            border-radius: 22px;
            background: linear-gradient(135deg, rgba(46, 124, 246, 0.3), transparent 40%, rgba(25, 211, 218, 0.2));
            pointer-events: none;
            z-index: -1;
        }

        .glass-frame img {
            width: 100%;
            height: auto;
            border-radius: 14px;
            display: block;
        }

        /* Floating status lights */
        .floating-dot {
            position: absolute;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 12px rgba(25, 211, 218, 0.7);
            animation: float-dot 3s ease-in-out infinite;
            z-index: 4;
        }

        .floating-dot.dot-1 {
            top: 15%;
            right: 10%;
        }

        .floating-dot.dot-2 {
            bottom: 20%;
            right: 8%;
            animation-delay: 1.2s;
            width: 6px;
            height: 6px;
            background: var(--primary);
            box-shadow: 0 0 10px rgba(46, 124, 246, 0.7);
        }

        .floating-dot.dot-3 {
            top: 30%;
            left: 5%;
            animation-delay: 2.1s;
            width: 7px;
            height: 7px;
            background: var(--warning);
            box-shadow: 0 0 10px rgba(229, 165, 75, 0.6);
        }

        @keyframes float-dot {
            0%,
            100% {
                transform: translateY(0);
                opacity: 0.6;
            }
            50% {
                transform: translateY(-14px);
                opacity: 1;
            }
        }

        /* Trust badge strip */
        .hero-badges {
            margin-top: 56px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            align-items: center;
        }

        .trust-badge {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .trust-badge i {
            color: var(--accent);
            font-size: 16px;
        }

        /* ===== Section Common ===== */
        .section {
            position: relative;
            padding: var(--gap-section-desktop) 0;
        }

        .section-header {
            margin-bottom: 48px;
        }

        .section-header .eyebrow {
            display: inline-block;
            font-family: var(--font-mono);
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.12em;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: clamp(24px, 2.5vw, 34px);
            font-weight: 700;
            color: var(--white);
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 600px;
            line-height: 1.75;
        }

        /* ===== Story Section (Brand) ===== */
        .story-section {
            padding: var(--gap-section-desktop) 0;
            position: relative;
        }

        .story-section .story-layout {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 64px;
            align-items: center;
        }

        .story-copy .eyebrow {
            font-family: var(--font-mono);
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.12em;
            margin-bottom: 12px;
            display: block;
        }

        .story-copy h2 {
            font-size: clamp(24px, 2.5vw, 34px);
            font-weight: 700;
            color: var(--white);
            line-height: 1.3;
            margin-bottom: 20px;
        }

        .story-copy p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.85;
            margin-bottom: 18px;
        }

        .story-copy .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--primary);
            font-size: 14px;
            margin-top: 8px;
            position: relative;
        }

        .story-copy .text-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 1px;
            background: var(--primary);
            transition: var(--transition-base);
        }

        .story-copy .text-link:hover {
            color: var(--accent);
        }

        .story-copy .text-link:hover::after {
            width: 100%;
            background: var(--accent);
        }

        .story-visual {
            position: relative;
        }

        .story-visual .story-img {
            width: 100%;
            border-radius: var(--radius-lg);
            object-fit: cover;
            aspect-ratio: 4 / 3;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--card-border);
        }

        .story-visual .floating-stats {
            position: absolute;
            bottom: -24px;
            left: -20px;
            display: flex;
            gap: 16px;
            z-index: 2;
        }

        .stat-glass {
            background: rgba(17, 28, 43, 0.82);
            backdrop-filter: blur(18px);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 14px 20px;
            min-width: 120px;
            box-shadow: var(--shadow-card);
        }

        .stat-glass .stat-num {
            font-family: var(--font-mono);
            font-size: 24px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.3;
        }

        .stat-glass .stat-label {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 2px;
        }

        /* ===== Stats Strip ===== */
        .stats-section {
            padding: 0 0 var(--gap-section-desktop);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            backdrop-filter: blur(14px);
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            opacity: 0.6;
        }

        .stat-card:hover {
            transform: translateY(-4px);
            border-color: rgba(46, 124, 246, 0.35);
            box-shadow: var(--shadow-card);
        }

        .stat-card .stat-icon {
            width: 44px;
            height: 44px;
            margin: 0 auto 14px;
            border-radius: 12px;
            background: rgba(46, 124, 246, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary);
        }

        .stat-card .stat-num {
            font-family: var(--font-mono);
            font-size: clamp(26px, 2.4vw, 34px);
            font-weight: 700;
            color: var(--white);
            line-height: 1.2;
        }

        .stat-card .stat-desc {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ===== News / CMS Section ===== */
        .news-section {
            padding: var(--gap-section-desktop) 0;
            background: linear-gradient(180deg, rgba(13, 22, 36, 0.4) 0%, rgba(7, 13, 22, 0) 60%);
            position: relative;
        }

        .news-section .container {
            position: relative;
            z-index: 2;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            backdrop-filter: blur(14px);
            transition: var(--transition-base);
            position: relative;
        }

        .news-card:hover {
            border-color: var(--card-border-hover);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }

        .news-card a {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 16px;
            color: inherit;
            text-decoration: none;
        }

        .news-card__thumb {
            width: 120px;
            height: 80px;
            border-radius: 12px;
            overflow: hidden;
            flex-shrink: 0;
            background: rgba(255, 255, 255, 0.04);
            position: relative;
        }

        .news-card__thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-base);
        }

        .news-card:hover .news-card__thumb img {
            transform: scale(1.04);
        }

        .news-card__body {
            flex: 1;
            min-width: 0;
        }

        .news-card__body .badge {
            display: inline-block;
            background: rgba(46, 124, 246, 0.15);
            color: var(--primary);
            border: 1px solid rgba(46, 124, 246, 0.2);
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }

        .news-card__body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 6px;
            line-height: 1.5;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 100%;
        }

        .news-card__body p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 6px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 100%;
        }

        .news-card__meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 12px;
        }

        .news-card__meta time {
            font-family: var(--font-mono);
            color: var(--accent);
        }

        .news-card__meta .read-more {
            color: var(--text-secondary);
            font-size: 12px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--transition-base);
        }

        .news-card:hover .news-card__meta .read-more {
            color: var(--primary);
        }

        .empty-state {
            background: var(--card-bg);
            border: 1px dashed rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            padding: 48px 24px;
            text-align: center;
            color: var(--text-secondary);
            font-size: 14px;
            backdrop-filter: blur(12px);
        }

        .empty-state i {
            display: block;
            font-size: 32px;
            color: rgba(255, 255, 255, 0.15);
            margin-bottom: 12px;
        }

        .news-cta-row {
            margin-top: 32px;
            text-align: center;
        }

        .news-cta-row .btn-outline-custom {
            padding: 10px 24px;
            font-size: 13px;
        }

        /* ===== Flow Section ===== */
        .flow-section {
            padding: var(--gap-section-desktop) 0;
            position: relative;
        }

        .flow-layout {
            display: grid;
            grid-template-columns: 1.4fr 0.6fr;
            gap: 56px;
            align-items: center;
        }

        .flow-steps {
            display: flex;
            flex-direction: column;
            position: relative;
        }

        .flow-step {
            display: flex;
            gap: 24px;
            padding: 24px 0;
            position: relative;
        }

        .flow-step::before {
            content: '';
            position: absolute;
            left: 19px;
            top: 64px;
            bottom: -24px;
            width: 1px;
            border-left: 2px dashed rgba(46, 124, 246, 0.3);
        }

        .flow-step:last-child::before {
            display: none;
        }

        .flow-step .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 14px;
            color: #fff;
            box-shadow: 0 0 16px rgba(46, 124, 246, 0.5);
            flex-shrink: 0;
            z-index: 1;
        }

        .flow-step .step-content {
            padding-top: 4px;
        }

        .flow-step .step-content h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 6px;
        }

        .flow-step .step-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 480px;
        }

        .flow-side {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
        }

        .flow-side h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .flow-side h4 i {
            color: var(--accent);
            font-size: 16px;
        }

        .security-chip-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .security-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(25, 211, 218, 0.08);
            border: 1px solid rgba(25, 211, 218, 0.15);
            color: var(--accent);
            padding: 6px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 500;
            transition: var(--transition-base);
        }

        .security-chip:hover {
            background: rgba(25, 211, 218, 0.16);
            border-color: rgba(25, 211, 218, 0.3);
        }

        .security-chip .chip-icon {
            font-size: 11px;
        }

        /* ===== Security Section ===== */
        .security-section {
            padding: var(--gap-section-desktop) 0;
            background: linear-gradient(180deg, rgba(13, 22, 36, 0.3) 0%, rgba(7, 13, 22, 0) 40%);
        }

        .security-layout {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 64px;
            align-items: center;
        }

        .security-visual {
            position: relative;
        }

        .security-visual .security-img {
            width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--card-border);
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }

        .security-visual .shield-badge {
            position: absolute;
            top: -18px;
            right: -12px;
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #fff;
            box-shadow: 0 0 24px rgba(25, 211, 218, 0.5);
            border: 3px solid rgba(7, 13, 22, 0.6);
        }

        .security-content h2 {
            font-size: clamp(24px, 2.5vw, 34px);
            font-weight: 700;
            color: var(--white);
            line-height: 1.3;
            margin-bottom: 18px;
        }

        .security-content p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.85;
            margin-bottom: 18px;
        }

        .security-feature-list {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
        }

        .security-feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            font-size: 14px;
            color: var(--text-light);
        }

        .security-feature-list li i {
            color: var(--accent);
            font-size: 15px;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: var(--gap-section-desktop) 0;
            position: relative;
        }

        .faq-section .section-header {
            text-align: center;
        }

        .faq-section .section-header p {
            margin-left: auto;
            margin-right: auto;
        }

        .faq-container {
            max-width: 760px;
            margin: 0 auto;
        }

        .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg) !important;
            margin-bottom: 14px;
            overflow: hidden;
            backdrop-filter: blur(14px);
            transition: var(--transition-base);
        }

        .accordion-item:focus-within {
            border-color: var(--primary);
        }

        .accordion-button {
            background: transparent;
            color: var(--white);
            font-size: 15px;
            font-weight: 600;
            padding: 20px 24px;
            position: relative;
            border: none;
            box-shadow: none !important;
            transition: var(--transition-base);
        }

        .accordion-button::after {
            content: '\f067';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            background-image: none;
            width: auto;
            height: auto;
            transform: none;
            font-size: 13px;
            color: var(--text-secondary);
            transition: var(--transition-base);
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
            color: var(--primary);
        }

        .accordion-button:not(.collapsed) {
            background: rgba(46, 124, 246, 0.06);
            color: var(--white);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .accordion-button:hover {
            background: rgba(46, 124, 246, 0.08);
        }

        .accordion-body {
            padding: 16px 24px 20px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
            background: rgba(13, 22, 36, 0.3);
        }

        .accordion-item .accordion-button {
            box-shadow: none !important;
        }

        .accordion-item .accordion-button .left-bar {
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary);
            opacity: 0;
            transition: var(--transition-base);
        }

        .accordion-button:not(.collapsed) .left-bar {
            opacity: 1;
        }

        /* ===== CTA Subscribe ===== */
        .cta-section {
            padding: var(--gap-section-desktop) 0;
            position: relative;
            overflow: hidden;
        }

        .cta-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            transform: scaleY(-1);
            z-index: 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, var(--bg) 0%, rgba(7, 13, 22, 0.3) 100%);
            z-index: 1;
        }

        .cta-container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-container h2 {
            font-size: clamp(26px, 2.8vw, 38px);
            font-weight: 700;
            color: var(--white);
            margin-bottom: 16px;
            line-height: 1.35;
        }

        .cta-container p {
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.75;
            margin-bottom: 32px;
        }

        .subscribe-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto 24px;
        }

        .subscribe-form input {
            flex: 1;
            height: 46px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-md);
            padding: 0 18px;
            font-size: 14px;
            font-family: var(--font-main);
            color: var(--text-main);
            transition: var(--transition-base);
        }

        .subscribe-form input::placeholder {
            color: var(--text-secondary);
        }

        .subscribe-form input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 124, 246, 0.15);
            background: rgba(255, 255, 255, 0.08);
        }

        .subscribe-form .btn {
            height: 46px;
            padding: 0 24px;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .cta-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-light);
            font-size: 14px;
            transition: var(--transition-base);
        }

        .cta-secondary:hover {
            color: var(--accent);
        }

        .cta-secondary i {
            font-size: 15px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 64px 0 32px;
            position: relative;
            z-index: 2;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 1fr;
            gap: 48px;
            margin-bottom: 44px;
        }

        .footer-brand .brand {
            margin-bottom: 14px;
        }

        .footer-brand p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.75;
            max-width: 320px;
        }

        .footer-col h5 {
            font-size: 14px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-col h5::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: var(--primary);
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul a {
            color: var(--text-light);
            font-size: 13px;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul a::before {
            content: '';
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.2);
            transition: var(--transition-base);
        }

        .footer-col ul a:hover {
            color: var(--white);
            transform: translateX(3px);
        }

        .footer-col ul a:hover::before {
            background: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom p {
            color: var(--text-secondary);
            font-size: 12px;
            margin: 0;
        }

        .footer-bottom a {
            color: var(--text-secondary);
            font-size: 12px;
        }

        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 42px;
            height: 42px;
            background: rgba(17, 28, 43, 0.8);
            border: 1px solid var(--card-border);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 16px;
            z-index: 999;
            backdrop-filter: blur(12px);
            opacity: 0;
            pointer-events: none;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .back-to-top.visible {
            opacity: 1;
            pointer-events: auto;
        }

        .back-to-top:hover {
            color: var(--white);
            border-color: var(--primary);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199.98px) {
            .nav-links {
                gap: 20px;
            }

            .command-search {
                width: 160px;
            }

            .stats-grid {
                gap: 16px;
            }

            .stat-card {
                padding: 22px 16px;
            }

            .story-section .story-layout {
                gap: 40px;
            }
        }

        @media (max-width: 991.98px) {
            .nav-links,
            .nav-actions .command-search,
            .nav-actions .quick-link {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .mobile-nav {
                display: block;
            }

            .hero {
                padding: calc(var(--nav-height) + 48px) 0 64px;
            }

            .hero-content {
                padding-right: 0;
                text-align: center;
                margin-bottom: 40px;
            }

            .hero-sub {
                margin-left: auto;
                margin-right: auto;
            }

            .hero-cta {
                justify-content: center;
            }

            .hero-trust {
                justify-content: center;
            }

            .hero-visual {
                max-width: 480px;
                margin: 0 auto;
            }

            .story-section .story-layout {
                grid-template-columns: 1fr;
                gap: 48px;
            }

            .story-visual {
                max-width: 500px;
                margin: 0 auto;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .flow-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .flow-side {
                max-width: 480px;
                width: 100%;
                margin: 0 auto;
            }

            .security-layout {
                grid-template-columns: 1fr;
                gap: 48px;
            }

            .security-visual {
                order: 1;
                max-width: 500px;
                margin: 0 auto;
                width: 100%;
            }

            .security-content {
                order: 2;
            }

            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 767.98px) {
            .section,
            .story-section,
            .news-section,
            .flow-section,
            .security-section,
            .faq-section,
            .cta-section {
                padding: var(--gap-section-tablet) 0;
            }

            .news-card a {
                flex-direction: column;
                align-items: flex-start;
                padding: 14px;
            }

            .news-card__thumb {
                width: 100%;
                height: 140px;
            }

            .news-card__body h3 {
                white-space: normal;
            }

            .news-card__body p {
                white-space: normal;
            }

            .subscribe-form {
                flex-direction: column;
            }

            .subscribe-form .btn {
                justify-content: center;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-brand {
                grid-column: auto;
            }

            .stat-glass {
                min-width: 90px;
                padding: 10px 14px;
            }

            .stat-glass .stat-num {
                font-size: 18px;
            }
        }

        @media (max-width: 575.98px) {
            :root {
                --gap-section-tablet: 56px;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .brand-text {
                font-size: 15px;
            }

            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }

            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }

            .hero {
                padding: calc(var(--nav-height) + 32px) 0 56px;
            }

            .hero-sub {
                font-size: 15px;
            }

            .hero-trust {
                flex-wrap: wrap;
                gap: 10px 16px;
                font-size: 12px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-card {
                padding: 18px 12px;
            }

            .stat-card .stat-num {
                font-size: 22px;
            }

            .stat-card .stat-desc {
                font-size: 12px;
            }

            .flow-step {
                gap: 14px;
            }

            .flow-step .step-content h3 {
                font-size: 16px;
            }

            .flow-step .step-content p {
                font-size: 13px;
            }

            .accordion-button {
                font-size: 14px;
                padding: 16px 18px;
            }

            .accordion-body {
                padding: 14px 18px 18px;
                font-size: 13px;
            }

            .cta-container h2 {
                font-size: 24px;
            }

            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 36px;
                height: 36px;
            }
        }

/* roulang page: article */
:root {
  --bg-dark: #070D16;
  --bg-deep: #04080D;
  --bg-card: rgba(17, 28, 43, 0.66);
  --border-glass: rgba(255, 255, 255, 0.08);
  --primary: #2E7CF6;
  --primary-dark: #1F52C8;
  --cyan: #19D3DA;
  --warning: #E5A54B;
  --text-light: #F5F8FE;
  --text-main: #D3DFF0;
  --text-muted: #8EA3C0;
  --radius-lg: 16px;
  --radius-md: 10px;
  --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.28);
  --shadow-glow: 0 0 20px rgba(46, 124, 246, 0.35);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: "SF Mono", Consolas, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.85;
  overflow-x: hidden;
  position: relative;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.028) 0, rgba(255, 255, 255, 0.028) 1px, transparent 1px, transparent 80px);
  pointer-events: none;
  z-index: 0;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 13, 22, 0) 0%, rgba(7, 13, 22, 0.55) 100%);
  pointer-events: none;
  z-index: 0;
}
.container {
  position: relative;
  z-index: 1;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.25s;
}
a:hover {
  color: #7dabff;
}
img {
  max-width: 100%;
}
button,
input {
  font-family: inherit;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 13, 22, 0.75);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-glass);
  height: 72px;
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  box-shadow: 0 0 16px rgba(46, 124, 246, 0.35);
}
.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  padding: 24px 0;
  position: relative;
  transition: color 0.25s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 18px;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--text-light);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.command-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 6px 12px;
  width: 200px;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.command-search:hover,
.command-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(46, 124, 246, 0.15);
}
.command-search i {
  color: var(--text-muted);
  font-size: 13px;
}
.command-search input {
  border: none;
  background: transparent;
  color: var(--text-light);
  font-size: 13px;
  width: 100%;
  outline: none;
}
.command-search input::placeholder {
  color: var(--text-muted);
}
.kbd {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  padding: 2px 6px;
  white-space: nowrap;
}
.quick-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  padding: 8px 12px;
  border-radius: 10px;
  transition: color 0.25s, background 0.25s;
}
.quick-link:hover {
  color: var(--text-light);
  background: rgba(255, 255, 255, 0.06);
}
.btn-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: box-shadow 0.25s, transform 0.15s;
}
.btn-login:hover {
  box-shadow: 0 0 32px rgba(46, 124, 246, 0.55);
  transform: translateY(-1px);
  color: #fff;
}
.btn-login:active {
  transform: translateY(1px);
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  color: var(--text-light);
  width: 42px;
  height: 42px;
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: box-shadow 0.25s, transform 0.15s, filter 0.25s;
}
.btn-primary:hover {
  box-shadow: 0 0 32px rgba(46, 124, 246, 0.55);
  filter: brightness(1.1);
  transform: translateY(-1px);
  color: #fff;
}
.btn-primary:active {
  transform: translateY(1px);
}
.btn-glass {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--text-light);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.15s;
}
.btn-glass:hover {
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}
.btn-block {
  display: flex;
  width: 100%;
}

.article-hero {
  position: relative;
  padding: 72px 0 56px;
  background: linear-gradient(180deg, rgba(46, 124, 246, 0.12), transparent 60%),
    url('/assets/images/backpic/back-1.webp') center 30% / cover no-repeat;
}
.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 13, 22, 0.72), var(--bg-dark) 92%);
}
.article-hero .container {
  position: relative;
  z-index: 2;
  max-width: 1100px;
}
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.breadcrumb-nav a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.25s;
}
.breadcrumb-nav a:hover {
  color: var(--primary);
}
.breadcrumb-nav .current {
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 300px;
}
.article-hero h1 {
  font-size: clamp(30px, 3.6vw, 44px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-light);
  margin-bottom: 20px;
  max-width: 820px;
  letter-spacing: 0.01em;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 14px;
}
.article-meta i {
  color: var(--cyan);
  margin-right: 6px;
}
.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(46, 124, 246, 0.15);
  border: 1px solid rgba(46, 124, 246, 0.3);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.25s, color 0.25s;
}
.badge-tag:hover {
  background: rgba(46, 124, 246, 0.25);
  color: #a8c8ff;
}

.article-main {
  padding: 72px 0 100px;
  max-width: 1200px;
}
.article-toc .toc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: sticky;
  top: 100px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.toc-card h4 {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-glass);
  letter-spacing: 0.02em;
}
#tocList {
  list-style: none;
  padding: 0;
  margin: 0 0 8px;
  max-height: 60vh;
  overflow-y: auto;
}
.toc-item {
  margin-bottom: 6px;
}
.toc-item a {
  display: block;
  padding: 6px 10px;
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 13px;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: all 0.25s;
}
.toc-item a:hover {
  color: var(--text-light);
  background: rgba(46, 124, 246, 0.08);
  border-left-color: var(--primary);
}
.toc-item.toc-sub {
  padding-left: 12px;
}
.toc-item.toc-sub a {
  font-size: 12px;
  padding-left: 14px;
}
.toc-empty {
  color: var(--text-muted);
  font-size: 13px;
  padding: 12px 0;
}
.toc-cta {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-glass);
}

.article-body {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 48px 56px;
  box-shadow: var(--shadow-card);
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-main);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.article-body h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-light);
  margin: 48px 0 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-glass);
  scroll-margin-top: 100px;
  letter-spacing: 0.01em;
}
.article-body h2:first-child {
  margin-top: 0;
}
.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-light);
  margin: 32px 0 14px;
  scroll-margin-top: 100px;
}
.article-body p {
  margin-bottom: 20px;
}
.article-body a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-body img {
  max-width: 100%;
  border-radius: 12px;
  margin: 24px 0;
  border: 1px solid var(--border-glass);
}
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(46, 124, 246, 0.08);
  padding: 16px 24px;
  border-radius: 0 10px 10px 0;
  margin: 24px 0;
  color: var(--text-muted);
  font-style: normal;
}
.article-body code {
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.08);
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--cyan);
}
.article-body pre {
  background: #060B12;
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 20px;
  overflow-x: auto;
  margin: 24px 0;
}
.article-body pre code {
  background: none;
  padding: 0;
  color: #D3DFF0;
}
.article-body ul,
.article-body ol {
  padding-left: 24px;
  margin-bottom: 20px;
}
.article-body li {
  margin-bottom: 8px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
}
.article-pager {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin: 48px 0 20px;
  padding-top: 32px;
  border-top: 1px solid var(--border-glass);
}
.article-pager a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.25s;
}
.article-pager a:hover {
  border-color: var(--primary);
  color: var(--text-light);
}
.article-back {
  text-align: center;
  margin-top: 24px;
}

.empty-state {
  text-align: center;
  padding: 80px 30px;
  background: var(--bg-card);
  border: 1px dashed rgba(46, 124, 246, 0.3);
  border-radius: var(--radius-lg);
}
.empty-state i {
  font-size: 42px;
  color: var(--primary);
  margin-bottom: 16px;
}
.empty-state p {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.related-section {
  padding: 80px 0 96px;
  background: linear-gradient(180deg, var(--bg-dark), rgba(7, 13, 22, 0.5));
  border-top: 1px solid var(--border-glass);
}
.section-title {
  font-size: clamp(24px, 2.5vw, 32px);
  font-weight: 700;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 40px;
  letter-spacing: 0.02em;
}
.related-card {
  display: flex;
  gap: 20px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  text-decoration: none;
  height: 100%;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}
.related-card:hover {
  border-color: rgba(46, 124, 246, 0.5);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.related-thumb {
  width: 160px;
  flex-shrink: 0;
}
.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border-glass);
}
.related-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.related-info h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 8px;
}
.related-info p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.6;
}
.related-meta {
  font-size: 12px;
  color: var(--cyan);
  font-family: var(--font-mono);
}
.related-meta i {
  margin-right: 4px;
}

.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border-glass);
  padding: 64px 0 32px;
  position: relative;
  z-index: 1;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .brand {
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 320px;
  line-height: 1.7;
}
.footer-col h5 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.footer-col ul {
  list-style: none;
  padding: 0;
}
.footer-col li {
  margin-bottom: 10px;
}
.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.25s;
}
.footer-col a:hover {
  color: var(--text-light);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border-glass);
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom a {
  color: var(--text-muted);
  text-decoration: none;
}
.footer-bottom a:hover {
  color: var(--text-light);
}

@media (max-width: 991px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(7, 13, 22, 0.96);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    flex-direction: column;
    padding: 24px;
    gap: 0;
    border-bottom: 1px solid var(--border-glass);
    transform: translateY(-120%);
    transition: transform 0.3s;
    z-index: 999;
  }
  .nav-links.open {
    transform: translateY(0);
  }
  .nav-links a {
    padding: 14px 0;
    font-size: 16px;
  }
  .nav-links a::after {
    display: none;
  }
  .nav-actions .command-search {
    display: none;
  }
  .nav-actions .quick-link {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .article-hero {
    padding: 48px 0 40px;
  }
  .article-body {
    padding: 32px 28px;
  }
  .article-toc .toc-card {
    position: static;
    margin-bottom: 24px;
  }
  .related-card {
    flex-direction: column;
  }
  .related-thumb {
    width: 100%;
    height: 180px;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 767px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .article-main {
    padding: 48px 0 72px;
  }
  .related-thumb {
    height: 140px;
  }
  .article-pager {
    flex-direction: column;
  }
  .article-meta {
    gap: 12px 16px;
  }
}
@media (max-width: 520px) {
  .brand-text {
    font-size: 15px;
  }
  .btn-login {
    padding: 8px 16px;
    font-size: 13px;
  }
  .article-hero h1 {
    font-size: 26px;
  }
  .article-body {
    padding: 24px 20px;
  }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --bg: #070D16;
            --bg-footer: #04080D;
            --primary: #2E7CF6;
            --primary-deep: #1F52C8;
            --accent: #19D3DA;
            --accent-2: #B4C8E5;
            --warn: #E5A54B;
            --text-light: #F5F8FE;
            --text-main: #D3DFF0;
            --text-muted: #8EA3C0;
            --card-bg: rgba(17, 28, 43, 0.66);
            --card-border: rgba(255, 255, 255, 0.08);
            --card-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
            --nav-bg: rgba(7, 13, 22, 0.75);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-pill: 999px;
            --max-width: 1200px;
            --space-xxl: 120px;
            --space-xl: 72px;
            --space-lg: 56px;
            --nav-h: 72px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
            --font-mono: "SF Mono", "Consolas", "Roboto Mono", monospace;
            --ease: cubic-bezier(.4, 0, .2, 1);
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: 90px;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.85;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }
        a:hover {
            color: var(--text-light);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        ::selection {
            background: rgba(46, 124, 246, .35);
            color: #fff;
        }

        /* ===== Container & Section ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-pad {
            padding: var(--space-xl) 0;
        }

        /* ===== Buttons ===== */
        .btn-login {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 9px 20px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--primary), var(--primary-deep));
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(46, 124, 246, .35);
            transition: all .3s var(--ease);
            white-space: nowrap;
        }
        .btn-login:hover {
            color: #fff;
            box-shadow: 0 0 32px rgba(46, 124, 246, .55);
            transform: translateY(-1px);
        }
        .btn-login:active {
            transform: translateY(1px);
            box-shadow: 0 0 18px rgba(46, 124, 246, .4);
        }

        .btn-glass {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .14);
            color: var(--text-light);
            font-size: 15px;
            font-weight: 600;
            transition: all .3s var(--ease);
            backdrop-filter: blur(8px);
        }
        .btn-glass:hover {
            border-color: var(--primary);
            color: var(--text-light);
            box-shadow: 0 0 20px rgba(46, 124, 246, .25);
            transform: translateY(-1px);
        }
        .btn-glass:active {
            transform: translateY(1px);
        }

        /* ===== Navigation ===== */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--nav-h);
            background: var(--nav-bg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--card-border);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-h);
            gap: 20px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 18px;
            box-shadow: 0 0 14px rgba(46, 124, 246, .45);
            letter-spacing: 0;
        }
        .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-light);
            letter-spacing: .01em;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
        }
        .nav-links li a {
            position: relative;
            display: block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--accent-2);
            border-radius: 8px;
            transition: color .25s ease;
            white-space: nowrap;
        }
        .nav-links li a::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
            opacity: 0;
            transform: scaleX(.4);
            transition: opacity .25s, transform .25s var(--ease);
        }
        .nav-links li a:hover,
        .nav-links li a.active {
            color: var(--text-light);
        }
        .nav-links li a:hover::after,
        .nav-links li a.active::after {
            opacity: 1;
            transform: scaleX(1);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .command-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius-md);
            padding: 0 10px;
            height: 38px;
            width: 200px;
            transition: border-color .3s, box-shadow .3s;
        }
        .command-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 124, 246, .15);
        }
        .command-search i {
            color: var(--text-muted);
            font-size: 13px;
        }
        .command-search input {
            flex: 1;
            background: transparent;
            border: none;
            color: var(--text-light);
            font-size: 13px;
            padding: 0;
            min-width: 0;
        }
        .command-search input::placeholder {
            color: var(--text-muted);
        }
        .command-search .kbd {
            font-family: var(--font-mono);
            font-size: 11px;
            color: var(--accent-2);
            background: rgba(255, 255, 255, .07);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 5px;
            padding: 1px 6px;
            white-space: nowrap;
        }
        .quick-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--accent-2);
            padding: 8px 0;
            transition: color .25s;
        }
        .quick-link:hover {
            color: var(--text-light);
        }
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, .06);
            border: 1px solid var(--card-border);
            color: var(--text-light);
            font-size: 16px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: border-color .3s;
        }
        .nav-toggle:hover {
            border-color: var(--primary);
        }
        .search-icon-mobile {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, .06);
            border: 1px solid var(--card-border);
            color: var(--text-light);
            font-size: 14px;
            align-items: center;
            justify-content: center;
        }

        /* ===== Category Hero ===== */
        .cat-hero {
            position: relative;
            padding: 88px 0 64px;
            background: linear-gradient(180deg, rgba(7, 13, 22, .8), var(--bg) 96%), url('/assets/images/backpic/back-1.webp') center 22% / cover no-repeat;
            border-bottom: 1px solid rgba(255, 255, 255, .04);
        }
        .cat-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(46, 124, 246, .04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(46, 124, 246, .04) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
        }
        .cat-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb-list {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .breadcrumb-list a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            transition: color .25s;
        }
        .breadcrumb-list a:hover {
            color: var(--primary);
        }
        .breadcrumb-list .sep {
            color: rgba(255, 255, 255, .25);
        }
        .breadcrumb-list .current {
            color: var(--accent-2);
        }
        .cat-hero h1 {
            font-size: clamp(32px, 4.2vw, 48px);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-light);
            max-width: 720px;
            margin-bottom: 16px;
            letter-spacing: .01em;
        }
        .cat-hero h1 .hl {
            background: linear-gradient(90deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cat-hero .lead {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 0;
            line-height: 1.8;
        }
        .cat-hero-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 20px;
            flex-wrap: wrap;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--text-muted);
            background: rgba(255, 255, 255, .04);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: var(--radius-pill);
            padding: 4px 12px;
        }
        .hero-tag i {
            color: var(--accent);
            font-size: 11px;
        }

        /* ===== Category Main Body ===== */
        .cat-main {
            padding: var(--space-xl) 0 var(--space-xxl);
        }
        .cat-grid {
            display: grid;
            grid-template-columns: 248px minmax(0, 1fr);
            gap: 56px;
            align-items: start;
        }

        /* Sidebar Directory */
        .cat-sidebar {
            position: sticky;
            top: 96px;
        }
        .dir-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 22px;
            box-shadow: var(--card-shadow);
            backdrop-filter: blur(10px);
        }
        .dir-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .dir-title i {
            color: var(--primary);
            font-size: 13px;
        }
        .dir-list li {
            margin-bottom: 4px;
        }
        .dir-list a {
            display: block;
            padding: 8px 12px;
            font-size: 13px;
            color: var(--text-muted);
            border-radius: 8px;
            border-left: 2px solid rgba(255, 255, 255, .06);
            transition: all .25s ease;
        }
        .dir-list a:hover {
            color: var(--accent);
            background: rgba(25, 211, 218, .05);
            border-left-color: var(--accent);
        }
        .narrow-card {
            margin-top: 20px;
            background: rgba(46, 124, 246, .06);
            border: 1px solid rgba(46, 124, 246, .2);
            border-radius: var(--radius-lg);
            padding: 20px;
        }
        .narrow-card h5 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 8px;
        }
        .narrow-card p {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .narrow-card .btn-login {
            width: 100%;
            padding: 8px 16px;
            font-size: 13px;
        }

        /* Content Area */
        .cat-content {
            max-width: 760px;
            min-width: 0;
        }
        .content-block {
            margin-bottom: 56px;
            scroll-margin-top: 90px;
        }
        .content-block:last-child {
            margin-bottom: 0;
        }
        .content-block h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 12px;
            letter-spacing: .01em;
            line-height: 1.4;
        }
        .content-block h3 .sec-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            box-shadow: 0 0 12px rgba(46, 124, 246, .3);
        }
        .content-block p {
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .content-block strong {
            color: var(--text-light);
            font-weight: 600;
        }
        .content-block .text-note {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Step list */
        .step-list {
            margin: 20px 0;
            padding: 0;
        }
        .step-list li {
            position: relative;
            padding: 12px 0 12px 42px;
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.75;
            border-bottom: 1px dashed rgba(255, 255, 255, .06);
        }
        .step-list li:last-child {
            border-bottom: none;
        }
        .step-list li::before {
            content: attr(data-step);
            position: absolute;
            left: 0;
            top: 14px;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(46, 124, 246, .12);
            border: 1px solid rgba(46, 124, 246, .4);
            color: var(--primary);
            font-family: var(--font-mono);
            font-size: 13px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Icon list */
        .icon-list {
            margin: 12px 0;
        }
        .icon-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 6px 0;
            font-size: 15px;
            color: var(--text-main);
        }
        .icon-list li i {
            color: var(--accent);
            font-size: 13px;
            margin-top: 7px;
            flex-shrink: 0;
        }

        /* Verification badge grid */
        .verify-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
            gap: 14px;
            margin: 24px 0;
        }
        .verify-item {
            background: rgba(255, 255, 255, .04);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            text-align: center;
            transition: all .3s ease;
        }
        .verify-item:hover {
            border-color: rgba(46, 124, 246, .4);
            background: rgba(46, 124, 246, .07);
            transform: translateY(-3px);
        }
        .verify-item i {
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 10px;
            display: block;
        }
        .verify-item span {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-light);
            display: block;
        }
        .verify-item small {
            font-size: 12px;
            color: var(--text-muted);
            display: block;
            margin-top: 4px;
            line-height: 1.5;
        }

        /* Tip box */
        .tip-box {
            background: rgba(25, 211, 218, .07);
            border: 1px solid rgba(25, 211, 218, .2);
            border-left: 3px solid var(--accent);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            margin: 24px 0;
            color: var(--text-main);
            font-size: 14px;
            line-height: 1.85;
        }
        .tip-box strong {
            color: var(--text-light);
            display: block;
            margin-bottom: 6px;
            font-size: 14px;
        }
        .tip-box i {
            color: var(--accent);
            margin-right: 4px;
        }

        /* Content figure */
        .content-figure {
            margin: 32px 0;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            background: rgba(17, 28, 43, .5);
        }
        .content-figure img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 16 / 8;
        }
        .content-figure figcaption {
            padding: 14px 20px;
            font-size: 12px;
            color: var(--text-muted);
            border-top: 1px solid rgba(255, 255, 255, .05);
            background: rgba(7, 13, 22, .6);
        }

        /* FAQ mini */
        .faq-mini {
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-top: 20px;
        }
        .faq-mini-item {
            background: rgba(255, 255, 255, .03);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 18px 22px;
        }
        .faq-mini-item h5 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 8px;
        }
        .faq-mini-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* Table (simple) */
        .info-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            margin: 20px 0;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--card-border);
        }
        .info-table th {
            background: rgba(46, 124, 246, .1);
            color: var(--text-light);
            font-size: 14px;
            font-weight: 600;
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .info-table td {
            padding: 12px 16px;
            font-size: 14px;
            color: var(--text-main);
            border-bottom: 1px solid rgba(255, 255, 255, .04);
            background: rgba(255, 255, 255, .02);
        }
        .info-table tr:last-child td {
            border-bottom: none;
        }
        .info-table td:first-child {
            color: var(--accent-2);
            font-weight: 500;
            white-space: nowrap;
        }

        /* ===== Related Section ===== */
        .related-section {
            background: rgba(8, 14, 23, .6);
            border-top: 1px solid rgba(255, 255, 255, .04);
            border-bottom: 1px solid rgba(255, 255, 255, .04);
            padding: var(--space-xl) 0;
        }
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 32px;
            flex-wrap: wrap;
        }
        .section-head .en-label {
            font-family: var(--font-mono);
            font-size: 12px;
            letter-spacing: .18em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 4px;
        }
        .section-head h2 {
            font-size: clamp(24px, 2.5vw, 32px);
            font-weight: 700;
            color: var(--text-light);
            line-height: 1.3;
            margin: 0;
        }
        .section-head p {
            font-size: 14px;
            color: var(--text-muted);
            max-width: 420px;
            margin: 0;
        }
        .related-track {
            display: flex;
            gap: 22px;
            overflow-x: auto;
            padding: 4px 2px 12px;
            scroll-snap-type: x mandatory;
            scrollbar-width: thin;
            scrollbar-color: rgba(46, 124, 246, .3) transparent;
        }
        .related-track::-webkit-scrollbar {
            height: 4px;
        }
        .related-track::-webkit-scrollbar-thumb {
            background: rgba(46, 124, 246, .3);
            border-radius: 4px;
        }
        .related-track::-webkit-scrollbar-track {
            background: transparent;
        }
        .related-card {
            flex: 0 0 320px;
            scroll-snap-align: start;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--card-shadow);
            transition: transform .35s var(--ease), border-color .35s ease, box-shadow .35s ease;
            display: block;
        }
        .related-card:hover {
            transform: translateY(-5px);
            border-color: rgba(46, 124, 246, .5);
            box-shadow: 0 16px 40px rgba(0, 0, 0, .4);
        }
        .related-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            transition: transform .5s var(--ease);
        }
        .related-card:hover img {
            transform: scale(1.03);
        }
        .related-body {
            padding: 20px;
        }
        .related-body .badge-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: var(--radius-pill);
            background: rgba(46, 124, 246, .14);
            border: 1px solid rgba(46, 124, 246, .3);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
            font-family: var(--font-mono);
            letter-spacing: .04em;
        }
        .related-body h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 10px;
            line-height: 1.45;
        }
        .related-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ===== CTA Back ===== */
        .cta-back {
            padding: 72px 0;
            text-align: center;
            position: relative;
        }
        .cta-back::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
            opacity: .08;
            pointer-events: none;
        }
        .cta-back .container {
            position: relative;
            z-index: 1;
        }
        .cta-back h2 {
            font-size: clamp(22px, 2.5vw, 32px);
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .cta-back p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 28px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-footer);
            border-top: 1px solid rgba(255, 255, 255, .07);
            padding: 64px 0 32px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }
        .footer-brand .brand {
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 360px;
            margin: 0;
        }
        .footer-col h5 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 16px;
            letter-spacing: .02em;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-muted);
            transition: color .25s ease, padding-left .25s ease;
        }
        .footer-col ul li a:hover {
            color: var(--text-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .06);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
            transition: color .25s;
        }
        .footer-bottom a:hover {
            color: var(--text-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199.98px) {
            .command-search {
                width: 160px;
            }
            .nav-links li a {
                padding: 8px 10px;
            }
        }
        @media (max-width: 991.98px) {
            .nav-links {
                display: none;
                position: fixed;
                top: var(--nav-h);
                left: 0;
                right: 0;
                background: rgba(7, 13, 22, .96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 24px 20px;
                border-bottom: 1px solid var(--card-border);
                gap: 2px;
                z-index: 999;
                box-shadow: 0 20px 50px rgba(0, 0, 0, .45);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li a {
                padding: 12px 14px;
                font-size: 15px;
                border-radius: 10px;
            }
            .nav-links li a::after {
                display: none;
            }
            .nav-links li a:hover,
            .nav-links li a.active {
                background: rgba(46, 124, 246, .1);
            }
            .nav-actions {
                gap: 8px;
            }
            .command-search {
                display: none;
            }
            .search-icon-mobile {
                display: inline-flex;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .quick-link {
                display: none;
            }
            .cat-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cat-sidebar {
                position: static;
            }
            .dir-card {
                position: static;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 767.98px) {
            .container {
                padding: 0 20px;
            }
            .cat-main {
                padding: 56px 0 72px;
            }
            .content-block h3 {
                font-size: 19px;
            }
            .content-block h3 .sec-num {
                width: 28px;
                height: 28px;
                font-size: 13px;
            }
            .verify-grid {
                grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
                gap: 10px;
            }
            .related-card {
                flex-basis: 280px;
            }
            .cta-back {
                padding: 56px 0;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: auto;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cat-hero {
                padding: 64px 0 48px;
            }
            .cat-hero h1 {
                font-size: 30px;
            }
            .breadcrumb-list {
                margin-bottom: 18px;
            }
            .info-table td,
            .info-table th {
                padding: 10px 12px;
                font-size: 13px;
            }
        }
        @media (max-width: 575.98px) {
            .brand-text {
                font-size: 15px;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .cat-hero h1 {
                font-size: 26px;
            }
            .cat-hero .lead {
                font-size: 14px;
            }
            .step-list li {
                font-size: 14px;
                padding-left: 36px;
            }
            .step-list li::before {
                width: 24px;
                height: 24px;
                font-size: 12px;
                top: 14px;
            }
            .verify-grid {
                grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
            }
            .verify-item {
                padding: 14px 10px;
            }
            .related-card {
                flex-basis: 260px;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .content-figure img {
                aspect-ratio: 16 / 10;
            }
            .btn-glass {
                padding: 10px 22px;
                font-size: 14px;
                width: 100%;
            }
        }

/* roulang page: category2 */
/* ==========================================================
           设计变量与基础 Reset
        ========================================================== */
        :root {
            --bg-base: #070D16;
            --bg-elev: #0B1420;
            --bg-card: rgba(17, 28, 43, 0.66);
            --bg-footer: #04080D;
            --primary: #2E7CF6;
            --primary-deep: #1F52C8;
            --cyan: #19D3DA;
            --text-white: #F5F8FE;
            --text-main: #D3DFF0;
            --text-sub: #B4C8E5;
            --text-weak: #8EA3C0;
            --warning: #E5A54B;
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.12);
            --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.28);
            --shadow-glow: 0 0 20px rgba(46, 124, 246, 0.35);
            --shadow-glow-hover: 0 0 32px rgba(46, 124, 246, 0.55);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-input: 10px;
            --radius-tag: 999px;
            --space-section: 120px;
            --space-section-md: 72px;
            --space-section-sm: 56px;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --font-mono: "SF Mono", Consolas, monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.85;
            background: var(--bg-base);
            color: var(--text-main);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
            background-size: 44px 44px;
            pointer-events: none;
            z-index: 0;
        }

        body::after {
            content: '';
            position: fixed;
            top: 0;
            left: 50%;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg,
                    transparent 0%,
                    rgba(25, 211, 218, 0.04) 25%,
                    rgba(46, 124, 246, 0.06) 50%,
                    rgba(25, 211, 218, 0.04) 75%,
                    transparent 100%);
            transform: translateX(-50%);
            pointer-events: none;
            z-index: 0;
        }

        img {
            max-width: 100%;
            height: auto;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }

        button {
            border: none;
            background: none;
            font-family: inherit;
        }

        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
            position: relative;
            z-index: 2;
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ==========================================================
           导航栏
        ========================================================== */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 1000;
            height: 72px;
            background: rgba(7, 13, 22, 0.75);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-glass);
            display: flex;
            align-items: center;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            width: 100%;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            font-weight: 800;
            color: #fff;
            box-shadow: 0 0 16px rgba(46, 124, 246, 0.4);
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            padding: 8px 2px;
            position: relative;
        }

        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--cyan));
            transition: width 0.3s ease;
            border-radius: 2px;
        }

        .nav-links li a:hover {
            color: var(--text-white);
        }

        .nav-links li a:hover::after {
            width: 100%;
        }

        .nav-links li a.active {
            color: var(--text-white);
            font-weight: 600;
        }

        .nav-links li a.active::after {
            width: 100%;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .command-search {
            display: flex;
            align-items: center;
            gap: 8px;
            width: 200px;
            height: 38px;
            padding: 0 12px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-input);
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .command-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 124, 246, 0.2);
        }

        .command-search i {
            color: var(--text-weak);
            font-size: 13px;
        }

        .command-search input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 13px;
        }

        .command-search input::placeholder {
            color: var(--text-weak);
        }

        .kbd {
            font-family: var(--font-mono);
            font-size: 11px;
            color: var(--text-weak);
            background: rgba(255, 255, 255, 0.08);
            border-radius: 4px;
            padding: 2px 6px;
            border: 1px solid var(--border-light);
            white-space: nowrap;
        }

        .quick-link {
            font-size: 14px;
            color: var(--text-sub);
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 10px;
            border-radius: 8px;
            transition: background 0.25s ease, color 0.25s ease;
        }

        .quick-link:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.04);
        }

        .btn-login {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 38px;
            padding: 0 20px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--primary), var(--primary-deep));
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.02em;
            box-shadow: var(--shadow-glow);
            transition: box-shadow 0.3s ease, transform 0.2s ease, filter 0.3s ease;
        }

        .btn-login:hover {
            box-shadow: var(--shadow-glow-hover);
            filter: brightness(1.08);
            color: #fff;
        }

        .btn-login:active {
            transform: translateY(1px);
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-light);
            color: var(--text-sub);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }

        @media (max-width: 1100px) {
            .nav-links {
                gap: 16px;
            }

            .nav-links li a {
                font-size: 14px;
            }

            .command-search {
                width: 150px;
            }

            .quick-link {
                display: none;
            }
        }

        @media (max-width: 992px) {
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                background: rgba(7, 13, 22, 0.97);
                backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--border-glass);
                padding: 12px 24px 20px;
                transform: translateY(-120%);
                transition: transform 0.35s ease;
                z-index: 999;
            }

            .nav-links.open {
                transform: translateY(0);
            }

            .nav-links li {
                width: 100%;
            }

            .nav-links li a {
                display: block;
                padding: 14px 0;
                font-size: 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            }

            .nav-links li a::after {
                display: none;
            }

            .nav-links li a.active {
                color: var(--cyan);
            }

            .nav-toggle {
                display: flex;
            }

            .command-search {
                width: 120px;
            }

            .command-search .kbd {
                display: none;
            }
        }

        @media (max-width: 576px) {
            .brand-text {
                font-size: 16px;
            }

            .command-search {
                display: none;
            }

            .btn-login {
                height: 36px;
                padding: 0 14px;
                font-size: 14px;
            }
        }

        /* ==========================================================
           分类页 Hero / 页头
        ========================================================== */
        .category-hero {
            position: relative;
            padding: 72px 0 56px;
            background: linear-gradient(180deg, rgba(7, 13, 22, 0.6) 0%, rgba(7, 13, 22, 0.95) 100%),
                url('/assets/images/backpic/back-1.webp') center 40% / cover no-repeat;
            border-bottom: 1px solid var(--border-glass);
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at 20% 20%, rgba(46, 124, 246, 0.15) 0%, transparent 60%);
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 20px;
            padding: 0;
            background: transparent;
        }

        .breadcrumb a {
            color: var(--text-weak);
            transition: color 0.25s ease;
        }

        .breadcrumb a:hover {
            color: var(--cyan);
        }

        .breadcrumb .sep {
            color: var(--text-weak);
            opacity: 0.6;
        }

        .breadcrumb .current {
            color: var(--text-sub);
        }

        .category-hero h1 {
            font-size: clamp(32px, 4.2vw, 48px);
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .category-hero h1 .highlight {
            background: linear-gradient(90deg, var(--primary), var(--cyan));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .category-hero .lead-desc {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-sub);
            max-width: 680px;
            margin-bottom: 24px;
        }

        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 8px;
        }

        .hero-tags .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-sub);
            background: rgba(17, 28, 43, 0.66);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-tag);
            padding: 6px 14px;
            backdrop-filter: blur(8px);
        }

        .hero-tags .tag i {
            color: var(--cyan);
            font-size: 12px;
        }

        /* ==========================================================
           分类页正文区：左侧内容目录 + 右侧正文
        ========================================================== */
        .security-content-section {
            padding: var(--space-section) 0;
            position: relative;
        }

        .content-layout {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 48px;
            align-items: start;
        }

        /* 左侧固定内容目录 */
        .content-toc {
            position: sticky;
            top: 96px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            backdrop-filter: blur(12px);
            box-shadow: var(--shadow-card);
        }

        .content-toc h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .content-toc ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .content-toc ul li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 9px 12px;
            border-radius: 8px;
            font-size: 14px;
            color: var(--text-sub);
            transition: background 0.25s ease, color 0.25s ease;
        }

        .content-toc ul li a i {
            font-size: 12px;
            color: var(--text-weak);
            transition: color 0.25s ease;
        }

        .content-toc ul li a:hover {
            background: rgba(46, 124, 246, 0.08);
            color: var(--text-white);
        }

        .content-toc ul li a:hover i {
            color: var(--cyan);
        }

        .content-toc ul li a.active {
            background: rgba(46, 124, 246, 0.12);
            color: var(--text-white);
            font-weight: 600;
            border-left: 3px solid var(--primary);
        }

        /* 右侧主正文 */
        .security-main {
            min-width: 0;
        }

        .security-section-block {
            margin-bottom: 56px;
        }

        .security-section-block:last-child {
            margin-bottom: 0;
        }

        .security-section-block h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--border-glass);
            line-height: 1.4;
            position: relative;
        }

        .security-section-block h3::before {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 48px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--cyan));
            border-radius: 2px;
        }

        .security-section-block h3 i {
            color: var(--primary);
            margin-right: 10px;
            font-size: 18px;
        }

        .security-section-block p {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .security-section-block .lead-text {
            font-size: 16px;
            color: var(--text-sub);
            border-left: 3px solid var(--cyan);
            padding-left: 16px;
            margin-bottom: 20px;
            background: rgba(25, 211, 218, 0.04);
            border-radius: 0 8px 8px 0;
            padding-top: 10px;
            padding-bottom: 10px;
        }

        .security-list {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .security-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-main);
        }

        .security-list li i {
            color: var(--cyan);
            font-size: 13px;
            margin-top: 7px;
            flex-shrink: 0;
        }

        .security-note {
            background: rgba(17, 28, 43, 0.66);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 20px 22px;
            margin: 20px 0;
            backdrop-filter: blur(8px);
            position: relative;
        }

        .security-note .note-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .security-note .note-title i {
            color: var(--warning);
        }

        .security-note p {
            font-size: 14px;
            color: var(--text-sub);
            margin-bottom: 0;
            line-height: 1.75;
        }

        .security-image-wrap {
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-card);
            margin: 24px 0;
            position: relative;
        }

        .security-image-wrap img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .security-image-wrap:hover img {
            transform: scale(1.02);
        }

        .security-image-wrap .img-caption {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 40px 20px 14px;
            background: linear-gradient(0deg, rgba(7, 13, 22, 0.9) 0%, transparent 100%);
            font-size: 13px;
            color: var(--text-sub);
        }

        /* 策略数据卡 */
        .policy-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin: 24px 0;
        }

        .policy-stat-card {
            background: rgba(17, 28, 43, 0.66);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 20px;
            text-align: center;
            backdrop-filter: blur(8px);
            transition: border-color 0.3s ease, transform 0.3s ease;
        }

        .policy-stat-card:hover {
            border-color: rgba(46, 124, 246, 0.5);
            transform: translateY(-4px);
        }

        .policy-stat-card .stat-num {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .policy-stat-card .stat-label {
            font-size: 13px;
            color: var(--text-weak);
            margin-top: 6px;
        }

        /* ==========================================================
           相关内容区（横向滑动）
        ========================================================== */
        .related-section {
            padding: 0 0 var(--space-section);
        }

        .related-section .section-title {
            font-size: clamp(22px, 2.5vw, 28px);
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }

        .related-section .section-desc {
            font-size: 15px;
            color: var(--text-weak);
            margin-bottom: 28px;
        }

        .related-scroll {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            padding-bottom: 16px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: rgba(46, 124, 246, 0.4) transparent;
        }

        .related-scroll::-webkit-scrollbar {
            height: 6px;
        }

        .related-scroll::-webkit-scrollbar-track {
            background: rgba(255, 255, 255, 0.03);
            border-radius: 4px;
        }

        .related-scroll::-webkit-scrollbar-thumb {
            background: rgba(46, 124, 246, 0.4);
            border-radius: 4px;
        }

        .related-card {
            flex: 0 0 320px;
            scroll-snap-align: start;
            background: rgba(17, 28, 43, 0.66);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
            backdrop-filter: blur(8px);
        }

        .related-card:hover {
            border-color: rgba(46, 124, 246, 0.5);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }

        .related-card .card-img {
            height: 160px;
            overflow: hidden;
        }

        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .related-card:hover .card-img img {
            transform: scale(1.04);
        }

        .related-card .card-body {
            padding: 20px;
        }

        .related-card .card-tag {
            display: inline-block;
            font-size: 12px;
            color: var(--cyan);
            background: rgba(25, 211, 218, 0.08);
            border: 1px solid rgba(25, 211, 218, 0.2);
            border-radius: var(--radius-tag);
            padding: 3px 10px;
            margin-bottom: 10px;
        }

        .related-card .card-body h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-weak);
        }

        .related-card .card-meta .read-link {
            color: var(--primary);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .related-card .card-meta .read-link:hover {
            color: var(--cyan);
        }

        /* ==========================================================
           返回引导条
        ========================================================== */
        .back-guide {
            padding-bottom: var(--space-section);
            text-align: center;
        }

        .back-guide .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            height: 48px;
            padding: 0 32px;
            border-radius: var(--radius-btn);
            background: rgba(17, 28, 43, 0.66);
            border: 1px solid var(--border-light);
            color: var(--text-sub);
            font-size: 15px;
            font-weight: 600;
            backdrop-filter: blur(10px);
            transition: border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
        }

        .back-guide .btn-back-home:hover {
            border-color: var(--primary);
            color: var(--text-white);
            box-shadow: var(--shadow-glow);
        }

        /* ==========================================================
           页脚
        ========================================================== */
        .site-footer {
            background: var(--bg-footer);
            border-top: 1px solid var(--border-glass);
            padding: 56px 0 28px;
            position: relative;
            z-index: 2;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 36px;
            border-bottom: 1px solid var(--border-glass);
        }

        .footer-brand .brand {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-weak);
            max-width: 320px;
            margin-bottom: 0;
        }

        .footer-col h5 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-sub);
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

        .footer-col ul li a:hover {
            color: var(--text-white);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            padding-top: 24px;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-weak);
            margin: 0;
        }

        .footer-bottom a {
            color: var(--text-weak);
        }

        .footer-bottom a:hover {
            color: var(--text-white);
        }

        @media (max-width: 768px) {
            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ==========================================================
           响应式断点调整
        ========================================================== */
        @media (max-width: 992px) {
            .content-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .content-toc {
                position: static;
                width: 100%;
                padding: 20px;
            }

            .content-toc ul {
                flex-direction: row;
                flex-wrap: wrap;
                gap: 8px;
            }

            .content-toc ul li a {
                padding: 6px 12px;
                font-size: 13px;
                white-space: nowrap;
            }

            .content-toc ul li a i {
                display: none;
            }

            .policy-stats {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: var(--space-section-md);
            }

            .category-hero {
                padding: 48px 0 40px;
            }

            .category-hero h1 {
                font-size: 30px;
            }

            .category-hero .lead-desc {
                font-size: 15px;
            }

            .policy-stats {
                grid-template-columns: 1fr;
            }

            .related-card {
                flex-basis: 280px;
            }
        }

        @media (max-width: 576px) {
            :root {
                --space-section: var(--space-section-sm);
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .hero-tags .tag {
                font-size: 12px;
                padding: 5px 12px;
            }

            .security-section-block h3 {
                font-size: 19px;
            }

            .security-section-block p {
                font-size: 15px;
            }

            .related-card {
                flex-basis: 260px;
            }
        }

        /* 滚动锚点偏移 */
        .scroll-offset {
            scroll-margin-top: 90px;
        }

        /* 玻璃卡片内描边 */
        .glass-card {
            position: relative;
        }

        .glass-card::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: inherit;
            border: 1px solid rgba(255, 255, 255, 0.06);
            pointer-events: none;
        }

/* roulang page: category3 */
:root {
            --bg-primary: #070D16;
            --bg-card: rgba(17, 28, 43, 0.66);
            --bg-elev: rgba(23, 37, 57, 0.72);
            --primary: #2E7CF6;
            --primary-dark: #1F52C8;
            --secondary: #19D3DA;
            --text-primary: #F5F8FE;
            --text-body: #D3DFF0;
            --text-muted: #8EA3C0;
            --text-weak: #6B7F9E;
            --accent: #E5A54B;
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-strong: rgba(255, 255, 255, 0.14);
            --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.28);
            --shadow-glow: 0 0 20px rgba(46, 124, 246, 0.35);
            --shadow-glow-hover: 0 0 32px rgba(46, 124, 246, 0.55);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-input: 10px;
            --radius-tag: 999px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
            --font-mono: "SF Mono", "Consolas", "Courier New", monospace;
            --space-section-desktop: 120px;
            --space-section-tablet: 72px;
            --space-section-mobile: 56px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
            background-size: 48px 48px;
            color: var(--text-body);
            line-height: 1.85;
            font-size: 15px;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: #5C9CFF;
        }

        img {
            max-width: 100%;
            height: auto;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-primary);
            font-weight: 600;
            line-height: 1.3;
            margin-top: 0;
        }

        /* ========== NAVIGATION ========== */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 1030;
            height: 72px;
            background: rgba(7, 13, 22, 0.75);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-glass);
            display: flex;
            align-items: center;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            width: 100%;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
        }

        .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            font-family: var(--font-sans);
            box-shadow: 0 0 16px rgba(46, 124, 246, 0.3);
        }

        .brand-text {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 30px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 500;
            text-decoration: none;
            padding: 8px 2px;
            position: relative;
            transition: color 0.25s ease;
        }

        .nav-links a::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            transition: width 0.25s ease;
        }

        .nav-links a:hover {
            color: var(--text-primary);
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-links a.active {
            color: var(--text-primary);
            font-weight: 600;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .command-search {
            display: flex;
            align-items: center;
            gap: 8px;
            width: 200px;
            height: 36px;
            padding: 0 12px;
            border-radius: var(--radius-input);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .command-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 124, 246, 0.2);
        }

        .command-search i {
            color: var(--text-muted);
            font-size: 13px;
        }

        .command-search input {
            flex: 1;
            border: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 13px;
            outline: none;
            min-width: 0;
        }

        .command-search input::placeholder {
            color: var(--text-weak);
        }

        .command-search .kbd {
            font-family: var(--font-mono);
            font-size: 11px;
            color: var(--text-muted);
            border: 1px solid var(--border-glass);
            border-radius: 4px;
            padding: 1px 6px;
            white-space: nowrap;
        }

        .quick-link {
            color: var(--text-muted);
            font-size: 13px;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: color 0.2s ease;
            white-space: nowrap;
        }

        .quick-link:hover {
            color: var(--text-primary);
        }

        .btn-login {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 36px;
            padding: 0 20px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border: none;
            text-decoration: none;
            box-shadow: var(--shadow-glow);
            transition: box-shadow 0.25s ease, transform 0.2s ease, filter 0.2s ease;
            white-space: nowrap;
        }

        .btn-login:hover {
            color: #fff;
            box-shadow: var(--shadow-glow-hover);
            filter: brightness(1.1);
            transform: translateY(0px);
        }

        .btn-login:active {
            transform: translateY(1px);
            box-shadow: 0 0 12px rgba(46, 124, 246, 0.3);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 22px;
            cursor: pointer;
            padding: 8px;
        }

        @media (max-width: 1200px) {
            .command-search {
                width: 160px;
            }
        }

        @media (max-width: 992px) {
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(7, 13, 22, 0.95);
                backdrop-filter: blur(18px);
                flex-direction: column;
                align-items: flex-start;
                padding: 24px;
                gap: 16px;
                border-bottom: 1px solid var(--border-glass);
                transform: translateY(-120%);
                transition: transform 0.3s ease;
                z-index: 1020;
            }

            .nav-links.open {
                transform: translateY(0);
            }

            .nav-actions .command-search {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .nav-actions .quick-link {
                display: none;
            }
        }

        @media (max-width: 576px) {
            .site-nav {
                height: 64px;
            }

            .brand-text {
                font-size: 14px;
            }

            .btn-login {
                height: 32px;
                padding: 0 14px;
                font-size: 13px;
            }

            .nav-links {
                top: 64px;
            }
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            padding: 72px 0 56px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center 30%;
            background-repeat: no-repeat;
            border-bottom: 1px solid var(--border-glass);
            overflow: hidden;
        }

        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(7, 13, 22, 0.78) 0%, rgba(7, 13, 22, 0.88) 60%, rgba(7, 13, 22, 0.97) 100%);
            z-index: 1;
        }

        .page-banner::after {
            content: "";
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 32px 32px;
            z-index: 1;
            pointer-events: none;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb-custom {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .breadcrumb-custom a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color 0.2s;
        }

        .breadcrumb-custom a:hover {
            color: var(--text-primary);
        }

        .breadcrumb-custom .sep {
            color: var(--text-weak);
        }

        .breadcrumb-custom .current {
            color: var(--text-body);
            font-weight: 500;
        }

        .page-banner h1 {
            font-size: clamp(30px, 4vw, 44px);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.2;
        }

        .page-banner h1 .highlight {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-banner .banner-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* ========== INFO BAR ========== */
        .info-bar {
            background: rgba(17, 28, 43, 0.4);
            border-bottom: 1px solid var(--border-glass);
            padding: 14px 0;
            font-size: 13px;
            color: var(--text-muted);
        }

        .info-bar .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 32px;
        }

        .info-bar .item {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .info-bar .item i {
            color: var(--secondary);
            font-size: 14px;
        }

        .info-bar .item strong {
            color: var(--text-body);
            font-weight: 600;
        }

        /* ========== PROTOCOL CARD GRID ========== */
        .protocol-cards {
            padding: 80px 0 0;
        }

        .section-label {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--secondary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 8px;
        }

        .section-title {
            font-size: clamp(24px, 2.5vw, 34px);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .section-lead {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 680px;
            margin-bottom: 40px;
            line-height: 1.8;
        }

        .protocol-card-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            height: 100%;
            position: relative;
            overflow: hidden;
            transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
        }

        .protocol-card-item::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .protocol-card-item:hover {
            border-color: rgba(46, 124, 246, 0.4);
            transform: translateY(-4px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
        }

        .protocol-card-item:hover::before {
            opacity: 1;
        }

        .protocol-card-item .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 18px;
            background: linear-gradient(135deg, rgba(46, 124, 246, 0.2), rgba(25, 211, 218, 0.1));
            color: var(--secondary);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .protocol-card-item h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .protocol-card-item p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            margin-bottom: 14px;
        }

        .protocol-card-item .meta-row {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-weak);
            font-family: var(--font-mono);
            border-top: 1px solid var(--border-glass);
            padding-top: 12px;
            margin-top: auto;
        }

        .protocol-card-item .meta-row .tag-version {
            display: inline-flex;
            padding: 2px 10px;
            border-radius: var(--radius-tag);
            background: rgba(46, 124, 246, 0.15);
            color: #7CB1FF;
            font-size: 11px;
            font-weight: 600;
        }

        /* ========== MAIN CONTENT (TWO COLUMN) ========== */
        .protocol-detail {
            padding: 80px 0 0;
        }

        .detail-layout {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 48px;
            align-items: start;
        }

        .toc-sidebar {
            position: sticky;
            top: 100px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .toc-sidebar h5 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-glass);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .toc-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .toc-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 12px;
            border-radius: 8px;
            color: var(--text-muted);
            font-size: 13px;
            text-decoration: none;
            border-left: 2px solid transparent;
            transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
        }

        .toc-list a .toc-num {
            font-family: var(--font-mono);
            font-size: 11px;
            color: var(--text-weak);
            min-width: 18px;
        }

        .toc-list a:hover {
            background: rgba(46, 124, 246, 0.08);
            color: var(--text-primary);
            border-left-color: var(--primary);
        }

        .toc-list a.active {
            background: rgba(46, 124, 246, 0.12);
            color: var(--text-primary);
            border-left-color: var(--primary);
            font-weight: 500;
        }

        .detail-content {
            min-width: 0;
        }

        .detail-section {
            margin-bottom: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-glass);
        }

        .detail-section:last-child {
            border-bottom: none;
        }

        .detail-section .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            background: rgba(25, 211, 218, 0.12);
            color: var(--secondary);
            font-size: 12px;
            font-weight: 500;
            margin-bottom: 12px;
        }

        .detail-section h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .detail-section h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 28px 0 12px;
        }

        .detail-section p {
            color: var(--text-body);
            margin-bottom: 16px;
            line-height: 1.9;
        }

        .detail-section ul {
            padding-left: 20px;
            margin: 12px 0 20px;
        }

        .detail-section ul li {
            margin-bottom: 8px;
            color: var(--text-body);
            line-height: 1.7;
        }

        .detail-section .info-note {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            background: rgba(46, 124, 246, 0.08);
            border-left: 3px solid var(--primary);
            border-radius: 0 12px 12px 0;
            padding: 16px 18px;
            margin: 20px 0;
            font-size: 14px;
            color: var(--text-body);
        }

        .detail-section .info-note i {
            color: var(--primary);
            margin-top: 3px;
        }

        .detail-section .quote-block {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-glass);
            border-radius: 12px;
            padding: 20px 24px;
            margin: 20px 0;
            font-size: 14px;
            color: var(--text-muted);
            position: relative;
        }

        .detail-section .quote-block::before {
            content: "\201C";
            position: absolute;
            top: 12px;
            left: 12px;
            font-size: 40px;
            color: rgba(46, 124, 246, 0.4);
            font-family: Georgia, serif;
        }

        .detail-section .feature-grid-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin: 20px 0;
        }

        .detail-section .feature-item {
            display: flex;
            gap: 12px;
            padding: 16px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            transition: border-color 0.2s ease, background 0.2s ease;
        }

        .detail-section .feature-item:hover {
            border-color: rgba(46, 124, 246, 0.3);
            background: rgba(46, 124, 246, 0.05);
        }

        .detail-section .feature-item i {
            color: var(--secondary);
            font-size: 16px;
            margin-top: 3px;
        }

        .detail-section .feature-item span {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }

        @media (max-width: 992px) {
            .detail-layout {
                grid-template-columns: 1fr;
            }

            .toc-sidebar {
                position: static;
                top: auto;
                margin-bottom: 32px;
            }

            .toc-list {
                flex-direction: row;
                flex-wrap: wrap;
            }

            .toc-list a {
                border-left: none;
                border-bottom: 2px solid transparent;
            }

            .toc-list a:hover,
            .toc-list a.active {
                border-left: none;
                border-bottom-color: var(--primary);
            }
        }

        @media (max-width: 768px) {
            .detail-section .feature-grid-inner {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FLOW / PROCESS ========== */
        .agreement-flow {
            padding: 80px 0;
        }

        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
            margin-top: 48px;
        }

        .flow-steps::before {
            content: "";
            position: absolute;
            top: 28px;
            left: 60px;
            right: 60px;
            height: 2px;
            background-image: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
            opacity: 0.3;
            z-index: 0;
        }

        .flow-step {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 0 8px;
        }

        .flow-step .step-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--secondary);
            background: var(--bg-elev);
            border: 1px solid var(--border-glass);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
        }

        .flow-step .step-tag {
            display: inline-block;
            font-family: var(--font-mono);
            font-size: 11px;
            color: var(--primary);
            background: rgba(46, 124, 246, 0.12);
            border-radius: var(--radius-tag);
            padding: 2px 12px;
            margin-bottom: 8px;
        }

        .flow-step h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .flow-step p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        @media (max-width: 992px) {
            .flow-steps {
                grid-template-columns: 1fr 1fr;
                gap: 32px 20px;
            }

            .flow-steps::before {
                display: none;
            }
        }

        @media (max-width: 576px) {
            .flow-steps {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 0 0 80px;
        }

        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            margin-bottom: 16px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(46, 124, 246, 0.3);
        }

        .faq-item .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            gap: 16px;
            user-select: none;
        }

        .faq-item .faq-q .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--secondary);
            background: rgba(25, 211, 218, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: transform 0.3s ease, background 0.3s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: rgba(46, 124, 246, 0.15);
            color: var(--primary);
        }

        .faq-item .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-item .faq-a-inner {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
        }

        /* ========== RELATED SECTION ========== */
        .related-section {
            padding: 0 0 80px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .related-card {
            display: flex;
            align-items: center;
            gap: 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 20px;
            box-shadow: var(--shadow-card);
            transition: border-color 0.3s ease, transform 0.3s ease;
            text-decoration: none;
        }

        .related-card:hover {
            border-color: rgba(46, 124, 246, 0.4);
            transform: translateY(-3px);
        }

        .related-card .rel-img {
            width: 90px;
            height: 72px;
            border-radius: 12px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .related-card .rel-content {
            min-width: 0;
        }

        .related-card .rel-tag {
            display: inline-block;
            font-size: 11px;
            color: var(--secondary);
            margin-bottom: 4px;
            font-weight: 500;
        }

        .related-card h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .related-card p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        @media (max-width: 768px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== CTA / BACK SECTION ========== */
        .cta-back-section {
            padding: 0 0 80px;
        }

        .cta-back-box {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: 20px;
            padding: 40px;
            text-align: center;
            box-shadow: var(--shadow-card);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }

        .cta-back-box::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(7, 13, 22, 0.85);
            z-index: 1;
        }

        .cta-back-box .cta-inner {
            position: relative;
            z-index: 2;
        }

        .cta-back-box h3 {
            font-size: clamp(22px, 2.6vw, 32px);
            margin-bottom: 12px;
        }

        .cta-back-box p {
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 auto 28px;
            font-size: 14px;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border: none;
            box-shadow: var(--shadow-glow);
            transition: box-shadow 0.25s ease, transform 0.2s ease, filter 0.2s ease;
            text-decoration: none;
            gap: 8px;
        }

        .btn-primary-custom:hover {
            color: #fff;
            box-shadow: var(--shadow-glow-hover);
            filter: brightness(1.1);
            transform: translateY(-1px);
        }

        .btn-ghost-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid rgba(255, 255, 255, 0.16);
            text-decoration: none;
            gap: 8px;
            transition: border-color 0.25s ease, background 0.25s ease, color 0.25s ease;
        }

        .btn-ghost-custom:hover {
            border-color: var(--primary);
            color: var(--text-primary);
            background: rgba(46, 124, 246, 0.08);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #04080D;
            border-top: 1px solid var(--border-glass);
            padding: 64px 0 0;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand .brand {
            margin-bottom: 14px;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
            margin-bottom: 0;
        }

        .footer-col h5 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            color: var(--text-muted);
            font-size: 13px;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .footer-col a:hover {
            color: var(--text-primary);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            border-top: 1px solid var(--border-glass);
            font-size: 13px;
            color: var(--text-weak);
        }

        .footer-bottom a {
            color: var(--text-weak);
            text-decoration: none;
        }

        .footer-bottom a:hover {
            color: var(--text-muted);
        }

        @media (max-width: 992px) {
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 576px) {
            .footer-top {
                grid-template-columns: 1fr;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                padding: 16px 0;
            }
        }

        /* ========== UTILITY ========== */
        .text-muted {
            color: var(--text-muted) !important;
        }

        .mt-40 {
            margin-top: 40px;
        }

        @media (max-width: 768px) {
            .protocol-cards {
                padding: 56px 0 0;
            }

            .protocol-detail {
                padding: 56px 0 0;
            }

            .agreement-flow {
                padding: 56px 0;
            }

            .faq-section {
                padding: 0 0 56px;
            }

            .related-section {
                padding: 0 0 56px;
            }

            .cta-back-section {
                padding: 0 0 56px;
            }

            .page-banner {
                padding: 48px 0 40px;
            }

            .cta-back-box {
                padding: 28px 20px;
            }
        }

        @media (max-width: 576px) {
            .cta-actions {
                flex-direction: column;
                align-items: center;
            }

            .btn-primary-custom,
            .btn-ghost-custom {
                width: 100%;
            }

            .protocol-card-item {
                padding: 20px;
            }

            .toc-sidebar {
                padding: 16px;
            }
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg-primary);
        }

        ::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.12);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: rgba(46, 124, 246, 0.35);
        }

        .section-head-center {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-head-center .section-lead {
            margin-left: auto;
            margin-right: auto;
        }