/* roulang page: index */
:root {
            --bg-primary: #0b0e14;
            --bg-secondary: #111722;
            --bg-card: rgba(255, 255, 255, .045);
            --bg-card-solid: #151b26;
            --border-color: rgba(255, 255, 255, .09);
            --brand-primary: #f8b84a;
            --brand-secondary: #ff5a5f;
            --brand-accent: #29d3c3;
            --text-primary: #f5f7fa;
            --text-secondary: #b7bec9;
            --text-muted: #7e8794;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 18px 50px rgba(0, 0, 0, .35);
            --shadow-hover: 0 24px 60px rgba(0, 0, 0, .45);
            --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background: var(--bg-primary);
            color: var(--text-primary);
            font-family: var(--font-family);
            line-height: 1.7;
            overflow-x: hidden;
        }

        a {
            color: var(--brand-primary);
            text-decoration: none;
            transition: color .2s ease, border-color .2s ease, background .2s ease;
        }

        a:hover {
            color: var(--brand-secondary);
        }

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

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1080;
            background: rgba(11, 14, 20, .72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, .07);
        }

        .navbar {
            padding: 14px 0;
        }

        .navbar-brand {
            font-size: 1.3rem;
            font-weight: 800;
            letter-spacing: .5px;
            background: linear-gradient(135deg, var(--brand-primary), #ffb35c);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .navbar-brand:hover {
            color: var(--brand-primary);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, .15);
            padding: 8px 10px;
            color: var(--text-primary);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(248, 184, 74, .25);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,.75)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-weight: 500;
            margin: 0 8px;
            padding: 8px 16px !important;
            border-radius: 999px;
            transition: all .2s ease;
        }

        .navbar-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, .06);
        }

        .navbar-nav .nav-link.active {
            color: #141414;
            background: var(--brand-primary);
            box-shadow: 0 8px 20px rgba(248, 184, 74, .25);
        }

        .btn-brand {
            background: linear-gradient(135deg, var(--brand-primary), #fd935c);
            border: 0;
            color: #111;
            font-weight: 700;
            padding: 10px 24px;
            border-radius: 999px;
            transition: transform .2s ease, box-shadow .2s ease;
        }

        .btn-brand:hover {
            color: #111;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(248, 184, 74, .32);
        }

        .btn-brand:focus-visible,
        .btn-outline-light-custom:focus-visible {
            outline: 3px solid var(--brand-primary);
            outline-offset: 3px;
        }

        .hero-section {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(11, 14, 20, .9) 0%, rgba(11, 14, 20, .62) 62%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 140px 0 80px;
        }

        .hero-section::after {
            content: "";
            position: absolute;
            inset: auto 0 0 0;
            height: 170px;
            background: linear-gradient(180deg, transparent, var(--bg-primary));
            pointer-events: none;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 8px 16px;
            border-radius: 999px;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .14);
            color: var(--brand-primary);
            font-weight: 600;
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: clamp(2.4rem, 6vw, 5rem);
            font-weight: 900;
            line-height: 1.12;
            margin: 24px 0 20px;
        }

        .hero-title .highlight {
            color: var(--brand-primary);
        }

        .hero-subtitle {
            color: var(--text-secondary);
            font-size: clamp(1rem, 2vw, 1.2rem);
            max-width: 560px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 34px;
        }

        .btn-outline-light-custom {
            border: 1.5px solid rgba(255, 255, 255, .35);
            color: var(--text-primary);
            background: transparent;
            border-radius: 999px;
            padding: 12px 26px;
            font-weight: 600;
            transition: all .2s ease;
        }

        .btn-outline-light-custom:hover {
            background: rgba(255, 255, 255, .1);
            color: #fff;
            border-color: var(--brand-primary);
        }

        .realtime-panel {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .12);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: calc(var(--radius) + 6px);
            padding: 28px;
            box-shadow: var(--shadow);
        }

        .realtime-panel .panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 22px;
        }

        .live-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--brand-accent);
            box-shadow: 0 0 0 4px rgba(41, 211, 195, .15);
            animation: pulse 1.6s infinite;
        }

        @keyframes pulse {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: .4;
            }
        }

        .status-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .status-list li {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .status-list li:last-child {
            border-bottom: 0;
        }

        .status-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            display: grid;
            place-items: center;
            background: rgba(248, 184, 74, .15);
            color: var(--brand-primary);
            font-size: 1rem;
            flex-shrink: 0;
        }

        .status-content strong {
            display: block;
            font-size: .95rem;
        }

        .status-content span {
            color: var(--text-muted);
            font-size: .82rem;
        }

        .section {
            padding: 100px 0;
        }

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

        .section-eyebrow {
            color: var(--brand-primary);
            font-weight: 700;
            letter-spacing: 2px;
            font-size: .8rem;
        }

        .section-title {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            margin: 8px 0 12px;
        }

        .section-desc {
            color: var(--text-muted);
            max-width: 640px;
        }

        .feature-card {
            height: 100%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 30px;
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(248, 184, 74, .35);
            box-shadow: var(--shadow-hover);
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: grid;
            place-items: center;
            background: linear-gradient(135deg, rgba(248, 184, 74, .18), rgba(255, 90, 95, .12));
            color: var(--brand-primary);
            font-size: 1.3rem;
            margin-bottom: 22px;
        }

        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .feature-card p {
            color: var(--text-muted);
            font-size: .95rem;
            margin-bottom: 0;
        }

        .category-card {
            background: linear-gradient(135deg, rgba(248, 184, 74, .08), rgba(255, 90, 95, .05));
            border: 1px solid var(--border-color);
            border-radius: calc(var(--radius) + 4px);
            overflow: hidden;
        }

        .category-card .category-thumb {
            min-height: 280px;
        }

        .category-card .category-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .category-content {
            padding: clamp(26px, 5vw, 52px);
        }

        .badge-soft {
            background: rgba(248, 184, 74, .15);
            color: var(--brand-primary);
            border-radius: 999px;
            padding: 5px 12px;
            font-size: .78rem;
            font-weight: 600;
            white-space: nowrap;
        }

        .post-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 24px;
            transition: border-color .2s ease, transform .2s ease;
        }

        .post-card:hover {
            border-color: rgba(248, 184, 74, .35);
            transform: translateY(-3px);
        }

        .post-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }

        .post-card h3 a {
            color: var(--text-primary);
        }

        .post-card h3 a:hover {
            color: var(--brand-primary);
        }

        .post-card p {
            color: var(--text-muted);
            margin-bottom: 0;
            font-size: .95rem;
        }

        .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
        }

        .post-meta time {
            color: var(--text-muted);
            font-size: .82rem;
        }

        .empty-state {
            background: var(--bg-card);
            border: 1px dashed var(--border-color);
            border-radius: var(--radius);
            padding: 40px 24px;
            text-align: center;
            color: var(--text-muted);
        }

        .stat-block {
            background: linear-gradient(180deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .01));
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 34px 22px;
            text-align: center;
            height: 100%;
        }

        .stat-number {
            font-size: clamp(2.4rem, 5vw, 3.2rem);
            font-weight: 900;
            color: var(--brand-primary);
            line-height: 1;
        }

        .stat-label {
            color: var(--text-muted);
            margin-top: 10px;
            font-size: .95rem;
        }

        .timeline {
            position: relative;
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .timeline-item {
            position: relative;
            padding: 0 0 36px 46px;
            border-left: 1px solid var(--border-color);
            margin-left: 8px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: "";
            position: absolute;
            left: -7px;
            top: 4px;
            width: 13px;
            height: 13px;
            border-radius: 50%;
            background: var(--brand-primary);
            box-shadow: 0 0 0 6px rgba(248, 184, 74, .12);
        }

        .timeline-item h4 {
            font-weight: 700;
            font-size: 1.05rem;
        }

        .timeline-item p {
            color: var(--text-muted);
            margin: 6px 0 0;
        }

        .rank-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .rank-list li {
            display: flex;
            gap: 16px;
            align-items: center;
            padding: 18px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            transition: all .2s ease;
        }

        .rank-list li:hover {
            border-color: rgba(248, 184, 74, .35);
            transform: translateX(6px);
        }

        .rank-number {
            font-weight: 900;
            font-size: 1.3rem;
            color: var(--text-muted);
            width: 42px;
        }

        .rank-list li:nth-child(1) .rank-number {
            color: var(--brand-primary);
        }

        .rank-list li:nth-child(2) .rank-number {
            color: var(--brand-secondary);
        }

        .rank-tag {
            margin-left: auto;
            flex-shrink: 0;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .2s ease;
        }

        .faq-item:hover {
            border-color: rgba(248, 184, 74, .25);
        }

        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            margin: 0;
            color: var(--text-primary);
        }

        .faq-question i {
            color: var(--brand-primary);
            transition: transform .2s ease;
            flex-shrink: 0;
        }

        .faq-answer {
            padding: 0 24px 22px;
            color: var(--text-muted);
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .cta-section {
            background: linear-gradient(135deg, rgba(11, 14, 20, .82), rgba(11, 14, 20, .62)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: calc(var(--radius) + 10px);
            padding: 70px 0;
            text-align: center;
        }

        .site-footer {
            background: #090c11;
            border-top: 1px solid var(--border-color);
            padding: 70px 0 30px;
        }

        .footer-brand {
            font-size: 1.25rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--brand-primary), #ffb35c);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
        }

        .footer-desc {
            color: var(--text-muted);
            max-width: 340px;
            margin-top: 12px;
            font-size: .95rem;
        }

        .footer-links a {
            color: var(--text-muted);
            display: inline-block;
            margin-right: 22px;
            font-size: .95rem;
        }

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

        .copyright {
            border-top: 1px solid rgba(255, 255, 255, .07);
            margin-top: 50px;
            padding-top: 24px;
            color: var(--text-muted);
            font-size: .9rem;
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(11, 14, 20, .98);
                border: 1px solid var(--border-color);
                border-radius: var(--radius);
                padding: 18px;
                margin-top: 12px;
            }

            .navbar-nav .nav-link {
                margin: 6px 0;
            }

            .hero-section {
                min-height: auto;
                padding: 140px 0 60px;
            }

            .section {
                padding: 70px 0;
            }

            .realtime-panel {
                margin-top: 30px;
            }
        }

        @media (max-width: 575.98px) {
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .realtime-panel {
                padding: 22px;
            }

            .post-card {
                padding: 18px;
            }

            .rank-list li {
                flex-wrap: wrap;
                gap: 10px;
            }

            .rank-tag {
                width: 100%;
                margin-left: 0;
                text-align: right;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #7c3aed;
            --primary-dark: #5b21b6;
            --primary-light: #ddd6fe;
            --accent: #f59e0b;
            --accent-dark: #b45309;
            --bg-dark: #0f1222;
            --bg-deep: #181b2e;
            --bg-card: #1e2135;
            --bg-light: #f8f7fc;
            --text-main: #1e1b2e;
            --text-light: #f1f0f7;
            --text-muted: #6b7280;
            --border-color: #e5e7eb;
            --border-dark: #2d2f45;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.1);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.18);
            --spacing-section: 5rem;
            --font-main: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }

        body {
            font-family: var(--font-main);
            background: var(--bg-light);
            color: var(--text-main);
            line-height: 1.7;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }

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

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

        .container {
            max-width: 1220px;
            padding: 0 1.5rem;
        }

        /* ======= Header / Nav ======= */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 18, 34, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.4s ease;
        }

        .site-header .navbar {
            padding: 0.85rem 0;
        }

        .navbar-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff !important;
            letter-spacing: 0.5px;
            position: relative;
            padding-left: 2.4rem;
            background: linear-gradient(135deg, #fff 0%, #c4b5fd 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .navbar-brand::before {
            content: '\f51e';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-52%);
            font-size: 1.4rem;
            background: linear-gradient(135deg, var(--accent), #f472b6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 8px;
            padding: 0.4rem 0.6rem;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.4);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.72);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.5rem 1.1rem;
            border-radius: 50px;
            margin: 0 0.15rem;
            transition: all 0.3s ease;
            position: relative;
        }

        .navbar-nav .nav-link:hover {
            color: #fff;
            background: rgba(124, 58, 237, 0.16);
        }

        .navbar-nav .nav-link.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 4px 16px rgba(124, 58, 237, 0.4);
        }

        .navbar-nav .btn-brand {
            background: linear-gradient(135deg, var(--accent), #f97316);
            color: #fff;
            font-weight: 600;
            border-radius: 50px;
            padding: 0.55rem 1.4rem;
            margin-left: 0.6rem;
            border: none;
            box-shadow: 0 4px 18px rgba(245, 158, 11, 0.35);
            transition: all 0.3s ease;
        }

        .navbar-nav .btn-brand:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 26px rgba(245, 158, 11, 0.5);
            color: #fff;
        }

        .navbar-nav .btn-brand:active {
            transform: translateY(0);
        }

        /* ======= Page Hero ======= */
        .page-hero {
            position: relative;
            padding: 9rem 0 5.5rem;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1c1f3a 55%, #241b45 100%);
            color: #fff;
            z-index: 1;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.28;
            z-index: -1;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.5), transparent 70%);
            border-radius: 50%;
            z-index: -1;
        }

        .page-hero .hero-content {
            max-width: 720px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1.2rem;
            background: rgba(124, 58, 237, 0.2);
            border: 1px solid rgba(196, 181, 253, 0.35);
            border-radius: 50px;
            font-size: 0.85rem;
            color: #ddd6fe;
            margin-bottom: 1.4rem;
        }

        .hero-badge i {
            color: var(--accent);
        }

        .page-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1.2rem;
            background: linear-gradient(90deg, #fff 0%, #c4b5fd 60%, #f6d785 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .page-hero .lead {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 2rem;
            max-width: 620px;
        }

        .hero-stats {
            display: flex;
            gap: 2.5rem;
            flex-wrap: wrap;
            margin-top: 1rem;
            padding-top: 1.8rem;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }

        .hero-stat h4 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 0.15rem;
        }

        .hero-stat span {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.88rem;
        }

        /* ======= Section Common ======= */
        .section {
            padding: var(--spacing-section) 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            border-radius: 50px;
            padding: 0.35rem 1.2rem;
            margin-bottom: 1rem;
            letter-spacing: 1px;
        }

        .section-title {
            font-size: 2.3rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 1.2rem;
        }

        .section-sub {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 640px;
            margin-bottom: 2.5rem;
        }

        /* ======= Card Common ======= */
        .custom-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            transition: all 0.35s ease;
            height: 100%;
        }

        .custom-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }

        /* ======= Intro / Concept Section ======= */
        .concept-section {
            position: relative;
            background: #fff;
        }

        .concept-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
        }

        .concept-image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .concept-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .concept-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(15, 18, 34, 0.45));
        }

        .concept-image .img-tag {
            position: absolute;
            left: 1.2rem;
            bottom: 1.2rem;
            z-index: 2;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 50px;
            padding: 0.4rem 1.2rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .concept-list {
            list-style: none;
            padding: 0;
            margin: 1.5rem 0 2rem;
        }

        .concept-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.8rem;
            margin-bottom: 0.9rem;
            color: #4b5563;
            font-size: 1rem;
        }

        .concept-list li i {
            color: var(--primary);
            font-size: 1.1rem;
            margin-top: 0.2rem;
        }

        /* ======= Mode Cards ======= */
        .mode-section {
            background: linear-gradient(180deg, var(--bg-light) 0%, #fff 100%);
        }

        .mode-wrapper {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }

        .mode-card {
            padding: 2.2rem 1.8rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .mode-card::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 120px;
            height: 120px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.1), transparent 70%);
            border-radius: 50%;
        }

        .mode-card .icon-wrap {
            width: 68px;
            height: 68px;
            border-radius: 18px;
            background: linear-gradient(135deg, var(--primary-light), #ede9fe);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.4rem;
            font-size: 1.6rem;
            color: var(--primary);
            transition: all 0.3s ease;
        }

        .mode-card:hover .icon-wrap {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            transform: scale(1.06);
        }

        .mode-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }

        .mode-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* ======= Tab Area ======= */
        .tabs-section {
            background: var(--bg-dark);
            color: #fff;
            position: relative;
        }

        .tabs-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
        }

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

        .tabs-section .section-label {
            background: rgba(255, 255, 255, 0.12);
            color: #ddd6fe;
        }

        .tabs-section .section-title {
            color: #fff;
        }

        .tabs-section .section-sub {
            color: rgba(255, 255, 255, 0.65);
        }

        .custom-tabs {
            display: flex;
            gap: 0.6rem;
            flex-wrap: wrap;
            margin-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 1.5rem;
        }

        .custom-tab-btn {
            padding: 0.65rem 1.6rem;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            font-weight: 500;
            border: 1px solid transparent;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .custom-tab-btn:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.16);
        }

        .custom-tab-btn.tab-active {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-color: rgba(196, 181, 253, 0.3);
            box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
        }

        .tab-pane {
            display: none;
            animation: fadeUp 0.5s ease;
        }

        .tab-pane.show {
            display: block;
        }

        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(14px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .tab-content-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.4rem;
        }

        .strategy-item {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.09);
            border-radius: var(--radius-md);
            padding: 1.6rem 1.8rem;
            display: flex;
            gap: 1.2rem;
            transition: all 0.3s ease;
        }

        .strategy-item:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(196, 181, 253, 0.3);
        }

        .strategy-item .num {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent);
            min-width: 2rem;
        }

        .strategy-item h4 {
            color: #fff;
            font-size: 1.15rem;
            margin-bottom: 0.6rem;
            font-weight: 600;
        }

        .strategy-item p {
            color: rgba(255, 255, 255, 0.62);
            font-size: 0.93rem;
            margin: 0;
        }

        /* ======= Learning Path ======= */
        .path-section {
            background: #fff;
        }

        .path-wrapper {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            position: relative;
        }

        .path-wrapper::before {
            content: '';
            position: absolute;
            top: 35px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-light), var(--primary), var(--accent));
            border-radius: 2px;
        }

        .path-step {
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .path-step .step-num {
            width: 64px;
            height: 64px;
            line-height: 64px;
            background: var(--bg-dark);
            color: #fff;
            font-size: 1.4rem;
            font-weight: 700;
            border-radius: 50%;
            margin: 0 auto 1.2rem;
            border: 4px solid #fff;
            box-shadow: 0 6px 24px rgba(124, 58, 237, 0.25);
        }

        .path-step:nth-child(2) .step-num {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        }

        .path-step:nth-child(3) .step-num {
            background: linear-gradient(135deg, var(--primary-dark), #4338ca);
        }

        .path-step:nth-child(4) .step-num {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        }

        .path-step h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .path-step p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* ======= Featured Content ======= */
        .featured-section {
            background: var(--bg-light);
        }

        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }

        .featured-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all 0.35s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .featured-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .featured-card .card-img {
            height: 220px;
            overflow: hidden;
            position: relative;
        }

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

        .featured-card:hover .card-img img {
            transform: scale(1.06);
        }

        .featured-card .card-body {
            padding: 1.8rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .featured-card .card-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            border-radius: 50px;
            padding: 0.25rem 0.9rem;
            margin-bottom: 1rem;
            align-self: flex-start;
        }

        .featured-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            line-height: 1.5;
        }

        .featured-card p {
            color: var(--text-muted);
            font-size: 0.92rem;
            flex: 1;
        }

        .featured-card .read-more {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            margin-top: 1rem;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            transition: gap 0.3s ease;
        }

        .featured-card .read-more:hover {
            gap: 0.7rem;
            color: var(--primary-dark);
        }

        /* ======= FAQ ======= */
        .faq-section {
            background: #fff;
        }

        .faq-wrapper {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.3rem 1.6rem;
            cursor: pointer;
            background: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            transition: background 0.3s ease;
        }

        .faq-question:hover {
            background: #faf9ff;
        }

        .faq-question .icon {
            min-width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: transform 0.3s ease;
            margin-left: 1rem;
        }

        .faq-item.open .faq-question .icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            display: none;
            padding: 0 1.6rem 1.4rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            display: block;
            animation: fadeUp 0.4s ease;
        }

        /* ======= CTA ======= */
        .cta-section {
            padding: 5rem 0;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1d1738 100%);
            position: relative;
            color: #fff;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
        }

        .cta-wrapper {
            max-width: 700px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .cta-wrapper h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 1.2rem;
        }

        .cta-wrapper p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.1rem;
            margin-bottom: 2rem;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: linear-gradient(135deg, var(--accent), #f97316);
            color: #fff;
            font-size: 1.05rem;
            font-weight: 600;
            padding: 0.9rem 2.2rem;
            border-radius: 50px;
            box-shadow: 0 8px 30px rgba(245, 158, 11, 0.4);
            transition: all 0.35s ease;
            border: none;
        }

        .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 40px rgba(245, 158, 11, 0.5);
            color: #fff;
        }

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

        .btn-cta i {
            transition: transform 0.3s ease;
        }

        .btn-cta:hover i {
            transform: translateX(5px);
        }

        /* ======= Footer ======= */
        .site-footer {
            background: var(--bg-dark);
            color: #fff;
            padding: 4.5rem 0 0;
            position: relative;
        }

        .site-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary-dark));
        }

        .site-footer .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            display: inline-block;
            margin-bottom: 1rem;
            background: linear-gradient(90deg, #fff, #c4b5fd);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
            max-width: 380px;
            margin-bottom: 0;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            transition: all 0.3s ease;
            font-size: 0.95rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .footer-links a::before {
            content: '\f105';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.8rem;
            color: var(--primary);
            opacity: 0.7;
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .copyright {
            margin-top: 3rem;
            padding: 1.5rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
        }

        .copyright p {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.88rem;
        }

        /* ======= Responsive ======= */
        @media (max-width: 1024px) {
            :root {
                --spacing-section: 4rem;
            }
            .concept-grid {
                gap: 2.5rem;
            }
            .path-wrapper {
                grid-template-columns: repeat(2, 1fr);
                gap: 2.5rem 1.5rem;
            }
            .path-wrapper::before {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .site-header .navbar-nav {
                padding-top: 1rem;
                padding-bottom: 0.5rem;
            }
            .navbar-nav .nav-link {
                margin: 0.2rem 0;
                padding: 0.6rem 1.2rem;
            }
            .navbar-nav .btn-brand {
                margin: 0.5rem 0 0.5rem 1.2rem;
            }
            .page-hero {
                padding: 7.5rem 0 4rem;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .concept-grid {
                grid-template-columns: 1fr;
            }
            .concept-image img {
                height: 320px;
            }
            .mode-wrapper {
                grid-template-columns: 1fr;
                max-width: 440px;
                margin: 0 auto;
            }
            .tab-content-grid {
                grid-template-columns: 1fr;
            }
            .featured-grid {
                grid-template-columns: 1fr;
                max-width: 460px;
                margin: 0 auto;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .hero-stats {
                gap: 1.5rem;
            }
            .cta-wrapper h2 {
                font-size: 1.7rem;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-section: 3rem;
            }
            .page-hero h1 {
                font-size: 1.65rem;
            }
            .page-hero .lead {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1rem;
            }
            .hero-stat h4 {
                font-size: 1.2rem;
            }
            .hero-stat span {
                font-size: 0.8rem;
            }
            .path-wrapper {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .faq-question {
                font-size: 0.95rem;
                padding: 1.1rem 1.2rem;
            }
            .faq-answer {
                padding: 0 1.2rem 1.2rem;
            }
            .strategy-item {
                padding: 1.2rem;
                flex-direction: column;
                gap: 0.6rem;
            }
            .featured-card .card-img {
                height: 180px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0b0d17;
            --bg-secondary: #12152a;
            --bg-card: #171b30;
            --bg-light: #1e2342;
            --accent-primary: #f0b35b;
            --accent-secondary: #e8535f;
            --text-primary: #f2f3f8;
            --text-secondary: #aab0c8;
            --text-muted: #7a8099;
            --border-color: #242a45;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.2);
            --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.3);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.25s ease;
            --transition-slow: 0.45s ease;
            --font-base: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        }

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

        body {
            font-family: var(--font-base);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            margin: 0;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

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

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 13, 23, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(36, 42, 69, 0.6);
        }

        .navbar {
            padding: 14px 0;
        }

        .navbar-brand {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            background: linear-gradient(135deg, var(--accent-primary), #ffd27a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: opacity var(--transition-fast);
        }

        .navbar-brand:hover {
            opacity: 0.85;
        }

        .navbar-nav .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 18px !important;
            border-radius: 30px;
            transition: all var(--transition-fast);
            position: relative;
        }

        .navbar-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(240, 179, 91, 0.08);
        }

        .navbar-nav .nav-link.active {
            color: var(--accent-primary);
            font-weight: 600;
            background: rgba(240, 179, 91, 0.12);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 10px;
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(240, 179, 91, 0.25);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .btn {
            border-radius: 12px;
            font-weight: 600;
            transition: all var(--transition-fast);
            border: none;
        }

        .btn-brand {
            background: linear-gradient(135deg, var(--accent-primary), #e8963a);
            color: #1a140a;
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 700;
            box-shadow: 0 4px 18px rgba(240, 179, 91, 0.25);
        }

        .btn-brand:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(240, 179, 91, 0.35);
            color: #1a140a;
        }

        .btn-brand:focus-visible,
        .btn-light:focus-visible {
            outline: 3px solid var(--accent-primary);
            outline-offset: 2px;
        }

        .btn-light {
            background: #efeff5;
            color: #1a140a;
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 700;
        }

        .btn-light:hover {
            background: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 255, 255, 0.15);
            color: #1a140a;
        }

        .btn-lg {
            padding: 14px 36px;
            font-size: 16px;
        }

        .article-hero {
            position: relative;
            padding: 110px 0 70px;
            background: linear-gradient(135deg, rgba(11, 13, 23, 0.94) 0%, rgba(18, 21, 42, 0.92) 50%, rgba(31, 36, 63, 0.88) 100%), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            border-bottom: 1px solid var(--border-color);
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb-nav a:hover {
            color: var(--accent-primary);
        }

        .breadcrumb-nav .sep {
            color: #4a5070;
        }

        .article-badge {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-primary), #e8963a);
            color: #1a140a;
            font-size: 13px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 30px;
            letter-spacing: 0.04em;
            margin-bottom: 18px;
        }

        .article-hero h1 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 18px;
            max-width: 800px;
            letter-spacing: -0.01em;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 10px;
        }

        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .meta-item i {
            color: var(--accent-primary);
            font-size: 15px;
        }

        .article-main-section {
            padding: 70px 0;
            background: var(--bg-primary);
        }

        .article-body {
            max-width: 860px;
            margin: 0 auto;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            box-shadow: var(--shadow-md);
            position: relative;
        }

        .article-body::before {
            content: '';
            position: absolute;
            top: 0;
            left: 48px;
            right: 48px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
            border-radius: 0 0 6px 6px;
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 1.8em;
            margin-bottom: 0.6em;
            padding-bottom: 0.3em;
            border-bottom: 1px solid var(--border-color);
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 1.5em;
            margin-bottom: 0.5em;
        }

        .article-body h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--accent-primary);
            margin-top: 1.4em;
            margin-bottom: 0.4em;
        }

        .article-body p {
            color: var(--text-secondary);
            line-height: 1.9;
            font-size: 16px;
            margin-bottom: 1.2em;
        }

        .article-body img {
            max-width: 100%;
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-body ul,
        .article-body ol {
            color: var(--text-secondary);
            line-height: 1.9;
            padding-left: 1.5em;
            margin-bottom: 1.2em;
        }

        .article-body li {
            margin-bottom: 0.4em;
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent-primary);
            background: rgba(240, 179, 91, 0.06);
            padding: 16px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-tags {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
        }

        .tag-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 600;
        }

        .tag-label i {
            color: var(--accent-primary);
        }

        .tag-item {
            background: rgba(240, 179, 91, 0.1);
            color: var(--accent-primary);
            font-size: 13px;
            padding: 4px 14px;
            border-radius: 30px;
            border: 1px solid rgba(240, 179, 91, 0.2);
            transition: all var(--transition-fast);
        }

        .tag-item:hover {
            background: rgba(240, 179, 91, 0.2);
        }

        .not-found-box {
            max-width: 640px;
            margin: 0 auto;
            padding: 80px 40px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            text-align: center;
            box-shadow: var(--shadow-md);
        }

        .not-found-icon {
            font-size: 52px;
            color: var(--accent-primary);
            margin-bottom: 22px;
        }

        .not-found-box h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .not-found-box p {
            color: var(--text-secondary);
            font-size: 16px;
            margin-bottom: 28px;
        }

        .section-header {
            margin-bottom: 44px;
        }

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

        .section-tag {
            display: inline-block;
            background: rgba(240, 179, 91, 0.1);
            color: var(--accent-primary);
            font-size: 13px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 30px;
            letter-spacing: 0.05em;
            margin-bottom: 14px;
            border: 1px solid rgba(240, 179, 91, 0.2);
        }

        .section-header h2 {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 16px;
            max-width: 620px;
        }

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

        .recommend-section {
            padding: 80px 0;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .recommend-card {
            display: block;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            transition: all var(--transition-slow);
            box-shadow: var(--shadow-sm);
        }

        .recommend-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(240, 179, 91, 0.35);
        }

        .recommend-cover {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--bg-light);
        }

        .recommend-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .recommend-card:hover .recommend-cover img {
            transform: scale(1.05);
        }

        .cover-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(11, 13, 23, 0.8);
            backdrop-filter: blur(6px);
            color: var(--accent-primary);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 30px;
            border: 1px solid rgba(240, 179, 91, 0.3);
        }

        .recommend-body {
            padding: 24px 24px 28px;
        }

        .recommend-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .recommend-body p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .process-section {
            padding: 80px 0;
            background: var(--bg-primary);
        }

        .process-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            text-align: center;
            height: 100%;
            position: relative;
            transition: all var(--transition-slow);
            overflow: hidden;
        }

        .process-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(240, 179, 91, 0.3);
        }

        .process-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
            border-radius: 3px 3px 0 0;
        }

        .process-num {
            position: absolute;
            top: 18px;
            right: 22px;
            font-size: 36px;
            font-weight: 900;
            color: rgba(240, 179, 91, 0.12);
            line-height: 1;
            letter-spacing: -0.02em;
        }

        .process-card i {
            font-size: 34px;
            color: var(--accent-primary);
            margin-bottom: 18px;
            display: inline-block;
        }

        .process-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .process-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .stats-section {
            padding: 70px 0;
            background: linear-gradient(135deg, rgba(240, 179, 91, 0.06), rgba(232, 83, 95, 0.04)), var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 24px;
            text-align: center;
            transition: all var(--transition-slow);
            height: 100%;
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(240, 179, 91, 0.25);
        }

        .stat-icon {
            font-size: 26px;
            color: var(--accent-primary);
            margin-bottom: 14px;
        }

        .stat-num {
            font-size: 40px;
            font-weight: 900;
            color: var(--text-primary);
            line-height: 1.1;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-primary), #ffd27a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 8px;
            font-weight: 500;
        }

        .faq-section {
            padding: 80px 0;
            background: var(--bg-primary);
        }

        .faq-section .container {
            max-width: 900px;
        }

        .accordion {
            --bs-accordion-color: var(--text-secondary);
            --bs-accordion-bg: var(--bg-card);
            --bs-accordion-border-color: var(--border-color);
            --bs-accordion-border-radius: var(--radius-md);
            --bs-accordion-btn-color: var(--text-primary);
            --bs-accordion-btn-bg: transparent;
            --bs-accordion-active-color: var(--accent-primary);
            --bs-accordion-active-bg: rgba(240, 179, 91, 0.06);
            --bs-accordion-btn-focus-box-shadow: 0 0 0 3px rgba(240, 179, 91, 0.2);
        }

        .accordion-item {
            margin-bottom: 16px;
            border-radius: var(--radius-md) !important;
            overflow: hidden;
            border: 1px solid var(--border-color);
            background: var(--bg-card);
        }

        .accordion-button {
            font-weight: 600;
            padding: 18px 24px;
            font-size: 16px;
            background: transparent;
        }

        .accordion-button:not(.collapsed) {
            background: rgba(240, 179, 91, 0.06);
            color: var(--accent-primary);
            box-shadow: none;
        }

        .accordion-button::after {
            filter: invert(70%) sepia(40%) saturate(500%) hue-rotate(330deg);
        }

        .accordion-body {
            padding: 16px 24px 22px;
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 15px;
            border-top: 1px solid var(--border-color);
        }

        .cta-section {
            padding: 80px 0;
            background: var(--bg-primary);
        }

        .cta-card {
            position: relative;
            background: linear-gradient(135deg, rgba(240, 179, 91, 0.12), rgba(232, 83, 95, 0.06)), var(--bg-card);
            border: 1px solid rgba(240, 179, 91, 0.2);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(240, 179, 91, 0.15), transparent 70%);
            border-radius: 50%;
        }

        .cta-card h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 14px;
            position: relative;
        }

        .cta-card p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 30px;
            position: relative;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
        }

        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }

        .footer-brand {
            display: inline-block;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 14px;
            background: linear-gradient(135deg, var(--accent-primary), #ffd27a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 360px;
            margin-bottom: 0;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 15px;
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links a::before {
            content: '›';
            color: var(--accent-primary);
            font-weight: 700;
        }

        .footer-links a:hover {
            color: var(--accent-primary);
            padding-left: 4px;
        }

        .copyright {
            margin-top: 44px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            text-align: center;
        }

        .copyright p {
            color: var(--text-muted);
            font-size: 13px;
        }

        @media (max-width: 991px) {
            .navbar-nav {
                padding-top: 12px;
                gap: 6px;
            }

            .navbar-nav .nav-link {
                padding: 10px 16px !important;
            }

            .article-hero {
                padding: 90px 0 50px;
            }

            .article-body {
                padding: 36px 30px;
            }
        }

        @media (max-width: 768px) {
            .article-main-section {
                padding: 50px 0;
            }

            .recommend-section,
            .process-section,
            .stats-section,
            .faq-section,
            .cta-section {
                padding: 56px 0;
            }

            .article-body {
                padding: 28px 22px;
                border-radius: var(--radius-md);
            }

            .article-body::before {
                left: 22px;
                right: 22px;
            }

            .process-card,
            .stat-card {
                padding: 28px 20px;
            }

            .cta-card {
                padding: 40px 24px;
            }

            .cta-buttons .btn {
                width: 100%;
                max-width: 260px;
            }

            .footer-links {
                margin-top: 20px;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 26px;
            }

            .article-meta {
                gap: 12px;
                font-size: 13px;
            }

            .section-header h2 {
                font-size: 24px;
            }

            .stat-num {
                font-size: 32px;
            }

            .article-tags {
                gap: 8px;
            }

            .not-found-box {
                padding: 60px 28px;
            }

            .cta-buttons .btn {
                max-width: 100%;
            }
        }