/* roulang page: index */
:root {
            --bg-primary: #050E1E;
            --bg-secondary: #0A1628;
            --primary: #0077FF;
            --accent: #00E0FF;
            --gold: #F7B500;
            --danger: #FF4D4F;
            --text-main: #EAF2FF;
            --text-sub: #9DB1CF;
            --text-muted: #6A7E9B;
            --card-border: rgba(255, 255, 255, 0.12);
            --card-highlight: rgba(0, 224, 255, 0.4);
            --card-bg: rgba(255, 255, 255, 0.05);
            --card-bg-blu: rgba(255, 255, 255, 0.08);
            --radius-large: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-default: 0 12px 32px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 16px 48px rgba(0, 224, 255, 0.12);
            --fs-hero: clamp(2.2rem, 5vw, 3.6rem);
            --fs-h2: clamp(1.8rem, 3vw, 2.4rem);
            --fs-h3: 1.2rem;
            --fs-h4: 1.05rem;
            --fs-body: 1rem;
            --fs-small: 0.875rem;
            --section-padding: clamp(4rem, 8vw, 6rem);
            --container-max: 1280px;
        }

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

        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background-color: var(--bg-primary);
            color: var(--text-main);
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease;
        }

        a:hover {
            color: #7ff0ff;
        }

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

        .container {
            max-width: var(--container-max);
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .section {
            padding-top: var(--section-padding);
            padding-bottom: var(--section-padding);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(5, 14, 30, 0.85);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .navbar-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            padding: 0.75rem 0;
        }

        .navbar-brand {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            letter-spacing: 0.5px;
        }

        .navbar-brand .brand-icon {
            color: var(--accent);
            font-size: 1.4rem;
        }

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

        .header-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 999px;
            padding: 0.25rem 0.25rem 0.25rem 1.25rem;
            width: 340px;
            max-width: 100%;
            transition: border-color 0.3s ease;
        }

        .header-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(0, 224, 255, 0.1);
        }

        .header-search input {
            background: transparent;
            border: none;
            color: var(--text-main);
            font-size: 0.9rem;
            outline: none;
            width: 100%;
        }

        .header-search input::placeholder {
            color: var(--text-muted);
        }

        .header-search button {
            background: linear-gradient(135deg, #0077FF, #00E0FF);
            border: none;
            color: #fff;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            font-size: 0.8rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.2s ease, box-shadow 0.3s ease;
            flex-shrink: 0;
        }

        .header-search button:hover {
            transform: scale(1.05);
            box-shadow: 0 0 16px rgba(0, 224, 255, 0.4);
        }

        .btn-glow {
            background: linear-gradient(135deg, #0077FF, #00E0FF);
            color: #fff;
            border: none;
            border-radius: var(--radius-md);
            padding: 0.5rem 1.6rem;
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.3px;
            box-shadow: 0 0 20px rgba(0, 224, 255, 0.25);
            transition: all 0.3s ease;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(0, 224, 255, 0.45);
            color: #fff;
        }

        .btn-outline-light {
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: var(--text-main) !important;
            background: transparent;
            border-radius: var(--radius-md);
            padding: 0.5rem 1.5rem;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.5);
            color: var(--text-main) !important;
        }

        .navbar-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 0.55rem 0;
        }

        .nav-tabs {
            display: flex;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            white-space: nowrap;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tabs {
            display: flex;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
            overflow-x: auto;
            scrollbar-width: none;
            white-space: nowrap;
        }

        .nav-tabs .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--text-sub);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 0.45rem 1.25rem;
            border-radius: 999px;
            transition: all 0.25s ease;
            border: none;
            background: transparent;
            white-space: nowrap;
        }

        .nav-tabs .nav-link i {
            font-size: 0.8rem;
            opacity: 0.7;
        }

        .nav-tabs .nav-link:hover,
        .nav-tabs .nav-link:focus {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-tabs .nav-link.active {
            background: rgba(0, 224, 255, 0.12);
            color: var(--accent);
            box-shadow: inset 0 0 0 1px rgba(0, 224, 255, 0.25);
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 76vh;
            background: 
                linear-gradient(90deg, rgba(5, 14, 30, 0.97), rgba(5, 14, 30, 0.55)),
                url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            right: -100px;
            top: 20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 224, 255, 0.15), transparent 65%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
            padding: clamp(3rem, 8vw, 6rem) 0;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(0, 224, 255, 0.1);
            border: 1px solid rgba(0, 224, 255, 0.2);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.35rem 1.1rem;
            border-radius: 999px;
            letter-spacing: 0.5px;
            margin-bottom: 1.5rem;
        }

        .hero h1 {
            font-size: var(--fs-hero);
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 1.25rem;
            letter-spacing: -0.5px;
            color: var(--text-main);
        }

        .hero h1 .grad-text {
            background: linear-gradient(135deg, #4da8ff, #00e0ff);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-sub {
            font-size: 1.2rem;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .hero-btns {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn-primary-custom {
            background: linear-gradient(135deg, #0077FF, #00E0FF);
            color: #fff;
            border: none;
            border-radius: var(--radius-md);
            padding: 0.65rem 2.2rem;
            font-weight: 600;
            font-size: 1rem;
            box-shadow: 0 0 20px rgba(0, 224, 255, 0.3);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-primary-custom:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 35px rgba(0, 224, 255, 0.5);
            color: #fff;
        }

        /* ===== Stats ===== */
        .stats-area {
            margin-top: -60px;
            position: relative;
            z-index: 5;
            padding-bottom: 1rem;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-large);
            padding: 1.75rem 1.5rem;
            text-align: left;
            box-shadow: var(--shadow-default);
            transition: border-color 0.35s ease, transform 0.35s ease;
            height: 100%;
        }

        .stat-card:hover {
            border-color: rgba(0, 224, 255, 0.4);
            transform: translateY(-6px);
        }

        .stat-card .stat-icon {
            font-size: 1.3rem;
            color: var(--accent);
            margin-bottom: 0.75rem;
            display: block;
        }

        .stat-card .stat-num {
            font-family: 'Rajdhani', 'Inter', sans-serif;
            font-size: 2.4rem;
            font-weight: 700;
            line-height: 1.2;
            background: linear-gradient(135deg, #ffffff, #8fd8ff);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 0.25rem;
        }

        .stat-card .stat-label {
            color: var(--text-sub);
            font-size: var(--fs-small);
        }

        /* ===== Section headers ===== */
        .section-head {
            margin-bottom: clamp(2rem, 4vw, 3rem);
        }

        .section-head .section-tag {
            display: inline-block;
            background: rgba(0, 224, 255, 0.08);
            border: 1px solid rgba(0, 224, 255, 0.2);
            color: var(--accent);
            font-size: 0.78rem;
            font-weight: 600;
            padding: 0.25rem 1rem;
            border-radius: 999px;
            margin-bottom: 1rem;
            letter-spacing: 0.5px;
        }

        .section-head h2 {
            font-size: var(--fs-h2);
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-main);
        }

        .section-head .section-sub {
            color: var(--text-sub);
            font-size: 1.05rem;
            max-width: 720px;
        }

        /* ===== Services ===== */
        .services-area {
            position: relative;
        }

        .service-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-large);
            padding: 2rem 1.75rem;
            height: 100%;
            backdrop-filter: blur(12px);
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }

        .service-card:hover {
            border-color: var(--card-highlight);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .service-card .service-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: rgba(0, 224, 255, 0.1);
            border: 1px solid rgba(0, 224, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent);
            margin-bottom: 1.5rem;
        }

        .service-card h3 {
            font-size: var(--fs-h3);
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 0.75rem;
        }

        .service-card p {
            color: var(--text-sub);
            font-size: var(--fs-body);
            line-height: 1.7;
            margin-bottom: 1.5rem;
            flex-grow: 1;
        }

        .service-link {
            color: var(--accent);
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.3px;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: gap 0.3s ease;
        }

        .service-link:hover {
            gap: 0.8rem;
            color: #fff;
        }

        .service-card.featured {
            background: rgba(0, 224, 255, 0.06);
            border-color: rgba(0, 224, 255, 0.25);
            position: relative;
            overflow: hidden;
        }

        .service-card.featured::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(0, 224, 255, 0.15), transparent 70%);
            pointer-events: none;
        }

        /* ===== Compare ===== */
        .compare-area {
            background: linear-gradient(180deg, rgba(5, 14, 30, 0.8), rgba(10, 22, 40, 0.6));
            position: relative;
        }

        .compare-card {
            border-radius: var(--radius-large);
            padding: 2.5rem 2rem;
            height: 100%;
            border: 1px solid var(--card-border);
            background: rgba(255, 255, 255, 0.03);
        }

        .compare-card.before {
            background: rgba(255, 255, 255, 0.02);
            border-color: rgba(255, 255, 255, 0.08);
            color: var(--text-muted);
            filter: saturate(0.5);
        }

        .compare-card.before .compare-title {
            color: var(--text-sub);
        }

        .compare-card.after {
            background: rgba(0, 224, 255, 0.04);
            border: 1px solid rgba(0, 224, 255, 0.3);
            box-shadow: 0 0 40px rgba(0, 224, 255, 0.08);
        }

        .compare-title {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            color: var(--text-main);
        }

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

        .compare-list li {
            display: flex;
            gap: 0.75rem;
            margin-bottom: 1rem;
            font-size: 0.95rem;
            color: var(--text-sub);
        }

        .compare-list li i {
            margin-top: 0.2rem;
        }

        .compare-list.before-list li i {
            color: var(--danger);
        }

        .compare-list.after-list li i {
            color: var(--accent);
        }

        /* ===== News List ===== */
        .news-area {
            background: var(--bg-primary);
        }

        .news-list-item {
            display: flex;
            gap: 1.5rem;
            padding: 1.5rem;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-large);
            transition: border-color 0.3s ease, background 0.3s ease;
            margin-bottom: 1rem;
        }

        .news-list-item:hover {
            border-color: rgba(0, 224, 255, 0.3);
            background: rgba(255, 255, 255, 0.06);
        }

        .news-thumb {
            width: 140px;
            height: 100px;
            border-radius: var(--radius-md);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-secondary);
        }

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

        .news-body h4 {
            font-size: var(--fs-h4);
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 0.4rem;
            line-height: 1.4;
        }

        .news-body h4 a:hover {
            color: var(--accent);
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
        }

        .news-meta .badge {
            background: rgba(0, 224, 255, 0.12);
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 500;
            padding: 0.3rem 0.8rem;
        }

        .news-summary {
            color: var(--text-sub);
            font-size: 0.9rem;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== FAQ ===== */
        .faq-area {
            background: var(--bg-secondary);
        }

        .accordion-custom .accordion-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 0.75rem;
            backdrop-filter: blur(12px);
            overflow: hidden;
        }

        .accordion-custom .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: rgba(0, 224, 255, 0.35);
            box-shadow: 0 0 16px rgba(0, 224, 255, 0.06);
        }

        .accordion-custom .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-weight: 500;
            font-size: 1rem;
            padding: 1.25rem 1.5rem;
            box-shadow: none;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0, 224, 255, 0.05);
            color: var(--accent);
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
        }

        .accordion-custom .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300E0FF'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
            transition: transform 0.3s ease;
        }

        .accordion-custom .accordion-body {
            color: var(--text-sub);
            padding: 0 1.5rem 1.25rem;
            line-height: 1.8;
        }

        /* ===== Contact Form ===== */
        .contact-area {
            background: var(--bg-primary);
        }

        .contact-card {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(24px);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-large);
            padding: clamp(2rem, 4vw, 3.5rem);
            box-shadow: var(--shadow-default);
        }

        .contact-card .form-label {
            color: var(--text-main);
            font-weight: 500;
            font-size: 0.9rem;
        }

        .form-control-custom {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            padding: 0.75rem 1rem;
            color: var(--text-main);
            transition: all 0.3s ease;
        }

        .form-control-custom::placeholder {
            color: var(--text-muted);
        }

        .form-control-custom:focus {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(0, 224, 255, 0.1);
            color: var(--text-main);
        }

        textarea.form-control-custom {
            min-height: 120px;
        }

        .btn-submit {
            background: linear-gradient(135deg, #0077FF, #00E0FF);
            color: #fff;
            border: none;
            border-radius: var(--radius-md);
            padding: 0.7rem 2.5rem;
            font-weight: 600;
            font-size: 1rem;
            box-shadow: 0 0 20px rgba(0, 224, 255, 0.3);
            transition: all 0.3s ease;
        }

        .btn-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 35px rgba(0, 224, 255, 0.5);
            color: #fff;
        }

        .privacy-note {
            color: var(--text-muted);
            font-size: 0.8rem;
            margin-top: 1rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #030A14;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 3rem;
            padding-bottom: 2rem;
        }

        .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 0.75rem;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .footer-title {
            color: var(--text-main);
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1.25rem;
        }

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

        .footer-links li {
            margin-bottom: 0.6rem;
        }

        .footer-links a {
            color: var(--text-sub);
            font-size: 0.9rem;
            transition: color 0.3s ease;
        }

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

        .footer-contact {
            color: var(--text-sub);
            font-size: 0.9rem;
        }

        .footer-contact i {
            color: var(--accent);
            width: 20px;
        }

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin: 2.5rem 0 1.5rem;
        }

        .copyright {
            color: var(--text-muted);
            font-size: 0.85rem;
            text-align: center;
        }

        /* ===== Responsive ===== */
        @media (max-width: 992px) {
            .navbar-top {
                flex-wrap: wrap;
            }
            .header-search {
                width: 100%;
                order: 3;
            }
            .navbar-brand {
                font-size: 1.1rem;
            }
            .btn-glow {
                padding: 0.5rem 1.2rem;
                font-size: 0.85rem;
            }
            .news-thumb {
                width: 110px;
                height: 85px;
            }
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 65vh;
            }
            .hero-content {
                text-align: center;
                max-width: 100%;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .hero-btns {
                justify-content: center;
            }
            .stats-area {
                margin-top: -40px;
            }
            .news-list-item {
                flex-direction: column;
                gap: 1rem;
            }
            .news-thumb {
                width: 100%;
                height: 140px;
            }
            .compare-card {
                margin-bottom: 1rem;
            }
            .contact-card {
                padding: 1.75rem;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .navbar-top {
                gap: 0.75rem;
            }
            .nav-tabs .nav-link {
                padding: 0.4rem 0.9rem;
                font-size: 0.85rem;
            }
            .stat-card {
                padding: 1.25rem 1rem;
            }
            .stat-card .stat-num {
                font-size: 2rem;
            }
            .service-card {
                padding: 1.5rem 1.25rem;
            }
            .contact-card {
                padding: 1.5rem 1.25rem;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #050E1E;
            --bg-secondary: #0A1628;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-strong: rgba(255, 255, 255, 0.08);
            --border-color: rgba(255, 255, 255, 0.12);
            --border-glow: rgba(0, 224, 255, 0.4);
            --primary-blue: #0077FF;
            --cyan: #00E0FF;
            --gold: #F7B500;
            --red: #FF4D4F;
            --text-primary: #EAF2FF;
            --text-secondary: #9DB1CF;
            --text-muted: #6A7E9B;
            --fs-hero: clamp(2.2rem, 5vw, 3.5rem);
            --fs-h2: clamp(1.8rem, 3vw, 2.4rem);
            --fs-h3: 1.2rem;
            --fs-h4: 1.05rem;
            --fs-body: 1rem;
            --fs-small: 0.875rem;
            --section-padding: clamp(4rem, 8vw, 6rem);
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 16px 48px rgba(0, 224, 255, 0.12);
            --shadow-glow: 0 0 20px rgba(0, 224, 255, 0.45);
            --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Inter", -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-body);
            font-size: var(--fs-body);
            line-height: 1.75;
            background: var(--bg-primary);
            color: var(--text-primary);
            -webkit-font-smoothing: antialiased;
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            background:
                radial-gradient(ellipse 60% 45% at 15% 5%, rgba(0, 119, 255, 0.12), transparent 70%),
                radial-gradient(ellipse 45% 35% at 85% 90%, rgba(0, 224, 255, 0.06), transparent 75%);
            pointer-events: none;
            z-index: 0;
        }

        body::after {
            content: "";
            position: fixed;
            inset: 0;
            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;
            pointer-events: none;
            z-index: 0;
        }

        a {
            color: var(--cyan);
            text-decoration: none;
            transition: color 0.25s ease;
        }

        a:hover {
            color: #fff;
        }

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

        .container {
            max-width: 1280px;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
            position: relative;
            z-index: 1;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(5, 14, 30, 0.85);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
        }

        .navbar-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            padding: 0.9rem 0;
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 0.625rem;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .navbar-brand:hover {
            color: #fff;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary-blue), var(--cyan));
            color: #fff;
            font-size: 0.95rem;
            box-shadow: var(--shadow-glow);
        }

        .header-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-color);
            border-radius: 999px;
            padding: 0.25rem 0.25rem 0.25rem 1rem;
            flex: 1;
            max-width: 380px;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .header-search:focus-within {
            border-color: var(--border-glow);
            box-shadow: 0 0 0 4px rgba(0, 224, 255, 0.08);
        }

        .header-search input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: 0.875rem;
            min-width: 0;
        }

        .header-search input::placeholder {
            color: var(--text-muted);
        }

        .header-search button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border: none;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-blue), var(--cyan));
            color: #fff;
            cursor: pointer;
            font-size: 0.8rem;
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

        .header-search button:hover {
            transform: scale(1.06);
            box-shadow: var(--shadow-glow);
        }

        .btn-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.6rem 1.4rem;
            border: none;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--primary-blue), var(--cyan));
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            white-space: nowrap;
            box-shadow: 0 4px 20px rgba(0, 119, 255, 0.25);
            transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
        }

        .btn-glow:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
            filter: brightness(1.08);
        }

        .btn-glow:focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 3px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.55rem 1.3rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-secondary);
            font-size: 0.875rem;
            font-weight: 500;
            transition: all 0.25s ease;
        }

        .btn-secondary:hover {
            color: var(--text-primary);
            border-color: var(--border-glow);
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .btn-secondary:focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 2px;
        }

        .navbar-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .nav-tabs {
            display: flex;
            gap: 0.35rem;
            list-style: none;
            margin: 0;
            padding: 0.4rem 0;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tabs .nav-item {
            flex-shrink: 0;
        }

        .nav-tabs .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            padding: 0.45rem 1.1rem;
            border-radius: 999px;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid transparent;
            transition: all 0.25s ease;
            white-space: nowrap;
        }

        .nav-tabs .nav-link i {
            font-size: 0.8rem;
        }

        .nav-tabs .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--border-color);
        }

        .nav-tabs .nav-link.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(0, 119, 255, 0.25), rgba(0, 224, 255, 0.15));
            border-color: var(--border-glow);
            box-shadow: 0 0 18px rgba(0, 224, 255, 0.12);
            font-weight: 600;
        }

        .article-main {
            padding: 2.5rem 0 var(--section-padding);
            position: relative;
            z-index: 1;
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.875rem;
            color: var(--text-muted);
            padding: 1.1rem 0 1.8rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            margin-bottom: 2rem;
        }

        .breadcrumb-custom a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

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

        .breadcrumb-custom .sep {
            color: var(--text-muted);
            opacity: 0.5;
        }

        .breadcrumb-custom .current {
            color: var(--text-muted);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 320px;
        }

        .article-card {
            max-width: 860px;
            margin: 0 auto 2.5rem;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: clamp(1.5rem, 3.5vw, 3rem);
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
        }

        .article-header {
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .article-header h1 {
            font-size: clamp(1.7rem, 3.2vw, 2.4rem);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.4rem 1.2rem;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .meta-item i {
            color: var(--cyan);
            opacity: 0.7;
            font-size: 0.8rem;
        }

        .article-content {
            color: var(--text-secondary);
            line-height: 1.85;
            font-size: 1rem;
        }

        .article-content p {
            margin: 0 0 1.4rem;
        }

        .article-content h2 {
            font-size: 1.5rem;
            color: var(--text-primary);
            font-weight: 700;
            margin: 2.2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 1.2rem;
            color: var(--text-primary);
            font-weight: 600;
            margin: 1.8rem 0 0.9rem;
            line-height: 1.4;
        }

        .article-content a {
            color: var(--cyan);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-color: rgba(0, 224, 255, 0.35);
        }

        .article-content a:hover {
            color: #fff;
            text-decoration-color: var(--cyan);
        }

        .article-content img {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            margin: 1.5rem 0;
            max-width: 100%;
        }

        .article-content blockquote {
            margin: 1.5rem 0;
            padding: 1rem 1.5rem;
            background: rgba(0, 224, 255, 0.05);
            border-left: 4px solid var(--cyan);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-primary);
            font-style: normal;
        }

        .article-content blockquote p {
            margin-bottom: 0;
        }

        .article-content ul,
        .article-content ol {
            padding-left: 1.4rem;
            margin: 1rem 0 1.4rem;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 0.55rem;
        }

        .article-content ul li::marker {
            color: var(--cyan);
        }

        .article-content ol li::marker {
            color: var(--cyan);
            font-weight: 600;
        }

        .article-content hr {
            border: none;
            border-top: 1px solid var(--border-color);
            margin: 2rem 0;
        }

        .related-section {
            max-width: 860px;
            margin: 0 auto;
        }

        .section-title {
            font-size: var(--fs-h3);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .section-title::after {
            content: "";
            flex: 1;
            height: 1px;
            background: linear-gradient(90deg, var(--border-glow), transparent);
        }

        .related-card {
            display: flex;
            flex-direction: column;
            height: 100%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
        }

        .related-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-hover);
        }

        .related-card img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            display: block;
        }

        .related-body {
            padding: 1.2rem 1.25rem 1.4rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            flex: 1;
        }

        .related-body h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.5;
            margin: 0;
        }

        .related-body time {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: auto;
        }

        .related-card:focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 4px;
        }

        .article-nav-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin-top: 2.5rem;
            padding-top: 1.75rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .not-found-box {
            max-width: 720px;
            margin: 2rem auto;
            text-align: center;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 4rem 2rem;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
        }

        .not-found-box i {
            font-size: 2.5rem;
            color: var(--cyan);
            margin-bottom: 1.2rem;
            display: block;
            opacity: 0.7;
        }

        .not-found-box h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.6rem;
        }

        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }

        .site-footer {
            background: #030914;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 3.5rem 0 2rem;
            position: relative;
            z-index: 1;
        }

        .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.65;
            max-width: 320px;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0.55rem;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.875rem;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

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

        .footer-contact {
            color: var(--text-secondary);
            font-size: 0.875rem;
            display: flex;
            align-items: center;
        }

        .footer-contact i {
            color: var(--cyan);
            opacity: 0.7;
            width: 20px;
            text-align: center;
        }

        .footer-divider {
            border: none;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin: 2.5rem 0 1.5rem;
        }

        .copyright {
            text-align: center;
            color: var(--text-muted);
            font-size: 0.8rem;
            letter-spacing: 0.02em;
            margin: 0;
        }

        @media (max-width: 992px) {
            .related-wrap .col-lg-4 {
                flex: 0 0 50%;
                max-width: 50%;
            }
        }

        @media (max-width: 768px) {
            .navbar-top {
                padding: 0.7rem 0;
            }

            .navbar-brand {
                font-size: 1.1rem;
            }

            .btn-glow {
                padding: 0.5rem 1rem;
                font-size: 0.82rem;
            }

            .article-card {
                padding: 1.4rem;
                border-radius: 16px;
            }

            .article-header h1 {
                font-size: 1.5rem;
            }

            .article-meta {
                gap: 0.3rem 0.8rem;
                font-size: 0.8rem;
            }

            .article-content {
                font-size: 0.95rem;
            }

            .article-content h2 {
                font-size: 1.3rem;
            }

            .related-section .col-md-4 {
                flex: 0 0 100%;
                max-width: 100%;
            }

            .related-card img {
                height: 175px;
            }

            .breadcrumb-custom {
                padding: 0.9rem 0 1.4rem;
                margin-bottom: 1.5rem;
                font-size: 0.8rem;
            }

            .site-footer {
                padding: 2.5rem 0 1.5rem;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }

            .related-wrap .col-lg-4 {
                flex: 0 0 100%;
                max-width: 100%;
            }

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

            .article-nav-buttons {
                flex-direction: column;
            }

            .article-nav-buttons .btn-secondary {
                width: 100%;
                justify-content: center;
            }

            .breadcrumb-custom .current {
                max-width: 160px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation: none !important;
                transition: none !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #050E1E;
            --bg-secondary: #0A1628;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-strong: rgba(255, 255, 255, 0.08);
            --border-card: rgba(255, 255, 255, 0.12);
            --border-glow: rgba(0, 224, 255, 0.4);
            --primary: #0077FF;
            --secondary: #00E0FF;
            --gold: #F7B500;
            --danger: #FF4D4F;
            --text-main: #EAF2FF;
            --text-secondary: #9DB1CF;
            --text-muted: #6A7E9B;
            --text-disabled: #4A5B73;
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 16px 48px rgba(0, 224, 255, 0.12);
            --glow-btn: 0 0 20px rgba(0, 224, 255, 0.45);
            --section-padding: clamp(4rem, 8vw, 6rem);
            --container-max: 1280px;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
            --font-num: "Inter", "Rajdhani", "PingFang SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-cn);
            background: var(--bg-primary);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 1rem;
            overflow-x: hidden;
        }

        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color 0.25s ease;
        }

        a:hover {
            color: #fff;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: var(--container-max);
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        ::selection {
            background: rgba(0, 224, 255, 0.25);
            color: #fff;
        }

        .section {
            padding: var(--section-padding) 0;
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 3rem;
        }

        .section-head h2 {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
        }

        .section-head p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.7;
        }

        .section-head .head-tag {
            display: inline-block;
            background: rgba(0, 224, 255, 0.1);
            border: 1px solid rgba(0, 224, 255, 0.3);
            color: var(--secondary);
            padding: 0.25rem 0.9rem;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.05em;
            margin-bottom: 1rem;
            text-transform: uppercase;
        }

        /* ---------- 双层导航 ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(5, 14, 30, 0.85);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .site-header .container {
            padding-top: 0;
            padding-bottom: 0;
        }

        .navbar-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            padding: 0.9rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.35rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text-main);
            white-space: nowrap;
        }

        .navbar-brand:hover {
            color: #fff;
        }

        .navbar-brand .brand-icon {
            display: inline-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-size: 0.95rem;
            box-shadow: 0 0 16px rgba(0, 119, 255, 0.35);
        }

        .header-search {
            position: relative;
            flex: 0 1 420px;
        }

        .header-search input {
            width: 100%;
            height: 38px;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(255, 255, 255, 0.12);
            background: rgba(255, 255, 255, 0.06);
            padding: 0 2.6rem 0 1.1rem;
            font-size: 0.875rem;
            color: var(--text-main);
            outline: none;
            transition: border-color 0.25s, box-shadow 0.25s;
        }

        .header-search input::placeholder {
            color: var(--text-muted);
        }

        .header-search input:focus {
            border-color: var(--secondary);
            box-shadow: 0 0 0 3px rgba(0, 224, 255, 0.15);
        }

        .header-search button {
            position: absolute;
            right: 4px;
            top: 4px;
            bottom: 4px;
            width: 32px;
            border: none;
            background: rgba(0, 224, 255, 0.12);
            color: var(--secondary);
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            cursor: pointer;
            transition: background 0.25s;
        }

        .header-search button:hover {
            background: rgba(0, 224, 255, 0.25);
        }

        .btn-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            padding: 0.5rem 1.3rem;
            border-radius: var(--radius-pill);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            box-shadow: var(--glow-btn);
            transition: transform 0.25s, box-shadow 0.25s;
            white-space: nowrap;
        }

        .btn-glow:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(0, 224, 255, 0.55);
        }

        .btn-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(0, 224, 255, 0.35);
        }

        .btn-glow:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

        .navbar-bottom {
            padding: 0.4rem 0;
        }

        .nav-tabs {
            display: flex;
            list-style: none;
            gap: 0.4rem;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            padding: 0.3rem 0;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tabs .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1.1rem;
            border-radius: var(--radius-pill);
            font-size: 0.9rem;
            color: var(--text-secondary);
            white-space: nowrap;
            border: 1px solid transparent;
            transition: all 0.25s;
        }

        .nav-tabs .nav-link i {
            font-size: 0.8rem;
            opacity: 0.8;
        }

        .nav-tabs .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-tabs .nav-link.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-color: transparent;
            box-shadow: 0 0 14px rgba(0, 224, 255, 0.25);
        }

        .nav-tabs .nav-link:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 1px;
        }

        /* ---------- 面包屑 ---------- */
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            display: inline-flex;
            padding: 0.35rem 1rem;
            border-radius: var(--radius-pill);
        }

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

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

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

        /* ---------- 分类页头 ---------- */
        .cat-hero {
            position: relative;
            min-height: 60vh;
            display: flex;
            align-items: center;
            background: linear-gradient(90deg, rgba(5, 14, 30, 0.95) 0%, rgba(5, 14, 30, 0.75) 55%, rgba(5, 14, 30, 0.4) 100%);
            padding: 4rem 0 5rem;
            overflow: hidden;
        }

        .cat-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            z-index: -1;
            transform: scale(1.05);
        }

        .cat-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(0, 119, 255, 0.18), transparent 55%);
            z-index: -1;
        }

        .cat-hero-content {
            max-width: 740px;
        }

        .cat-hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin: 1.2rem 0 1rem;
            background: linear-gradient(135deg, #fff 20%, var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .cat-hero .lead {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 620px;
        }

        .cat-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1.6rem;
        }

        .cat-hero .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            color: var(--text-secondary);
            font-size: 0.85rem;
        }

        .cat-hero .hero-meta i {
            color: var(--secondary);
        }

        /* ---------- 图文交错列表 ---------- */
        .featured-list {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .feature-item {
            display: flex;
            align-items: center;
            gap: 3rem;
            margin-bottom: 4.5rem;
        }

        .feature-item:last-child {
            margin-bottom: 0;
        }

        .feature-item .feature-img {
            flex: 0 0 45%;
            max-width: 45%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-card);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .feature-item .feature-img img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        .feature-item .feature-img:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .feature-item .feature-body {
            flex: 1;
        }

        .feature-item .feature-body .feature-num {
            font-family: var(--font-num);
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--secondary);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 0.5rem;
        }

        .feature-item .feature-body h3 {
            font-size: 1.5rem;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 0.8rem;
        }

        .feature-item .feature-body p {
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 1.2rem;
        }

        .feature-item .feature-body .feature-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--secondary);
            transition: gap 0.25s;
        }

        .feature-item .feature-body .feature-link:hover {
            gap: 0.7rem;
            color: #fff;
        }

        .feature-item.flex-row-reverse .feature-body {
            text-align: left;
        }

        /* ---------- 资讯卡片区 ---------- */
        .info-grid {
            background: var(--bg-primary);
        }

        .info-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .info-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-hover);
        }

        .info-card .card-img {
            height: 180px;
            overflow: hidden;
        }

        .info-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.4s;
        }

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

        .info-card .card-body {
            padding: 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .info-card .card-tag {
            display: inline-block;
            align-self: flex-start;
            background: rgba(0, 224, 255, 0.1);
            border: 1px solid rgba(0, 224, 255, 0.2);
            color: var(--secondary);
            border-radius: var(--radius-pill);
            padding: 0.2rem 0.7rem;
            font-size: 0.7rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 0.8rem;
        }

        .info-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 0.6rem;
        }

        .info-card .card-body p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            flex: 1;
        }

        .info-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            margin-top: 1rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 0.9rem;
        }

        .info-card .card-body .card-meta i {
            color: var(--secondary);
            font-size: 0.75rem;
        }

        .info-card.mt-4 {
            margin-top: 2rem !important;
        }

        /* ---------- FAQ ---------- */
        .faq-section {
            background: var(--bg-secondary);
        }

        .faq-section .accordion {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-section .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card) !important;
            border-radius: var(--radius-md) !important;
            margin-bottom: 1rem;
            overflow: hidden;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
        }

        .faq-section .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-size: 1.05rem;
            font-weight: 600;
            padding: 1.2rem 1.5rem;
            border: none;
            box-shadow: none !important;
        }

        .faq-section .accordion-button:not(.collapsed) {
            background: rgba(0, 224, 255, 0.04);
            color: var(--secondary);
        }

        .faq-section .accordion-button::after {
            background-image: none;
            content: "\F078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--text-secondary);
            font-size: 0.8rem;
            transition: transform 0.3s, color 0.3s;
            transform: rotate(0deg);
        }

        .faq-section .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            color: var(--secondary);
        }

        .faq-section .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(0, 224, 255, 0.15) !important;
            border-color: rgba(0, 224, 255, 0.3) !important;
        }

        .faq-section .accordion-body {
            color: var(--text-secondary);
            line-height: 1.8;
            padding: 0.5rem 1.5rem 1.5rem;
            font-size: 0.95rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        /* ---------- CTA ---------- */
        .cta-section {
            background: var(--bg-primary);
            padding-bottom: 5rem;
        }

        .cta-card {
            position: relative;
            background: linear-gradient(135deg, rgba(0, 119, 255, 0.12), rgba(0, 224, 255, 0.08));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 3.5rem 2.5rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -30%;
            width: 70%;
            height: 140%;
            background: radial-gradient(circle, rgba(0, 224, 255, 0.12), transparent 65%);
            pointer-events: none;
        }

        .cta-card h2 {
            font-size: clamp(1.6rem, 2.5vw, 2rem);
            font-weight: 700;
            margin-bottom: 0.75rem;
        }

        .cta-card p {
            color: var(--text-secondary);
            margin-bottom: 1.8rem;
            font-size: 1rem;
        }

        .cta-card .btn-glow {
            padding: 0.75rem 2.2rem;
            font-size: 1rem;
        }

        /* ---------- 页脚 ---------- */
        .site-footer {
            background: #020911;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 3.5rem 0 1.8rem;
        }

        .site-footer .footer-brand {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 0.75rem;
        }

        .site-footer .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 300px;
        }

        .site-footer .footer-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }

        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.55rem;
        }

        .site-footer .footer-links a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: all 0.25s;
        }

        .site-footer .footer-links a:hover {
            color: var(--text-main);
            padding-left: 4px;
        }

        .site-footer .footer-contact {
            color: var(--text-secondary);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
        }

        .site-footer .footer-contact i {
            color: var(--secondary);
            width: 20px;
            text-align: center;
        }

        .footer-divider {
            border-color: rgba(255, 255, 255, 0.08);
            margin: 2rem 0 1.2rem;
        }

        .site-footer .copyright {
            color: var(--text-muted);
            font-size: 0.8rem;
            text-align: center;
            margin: 0;
        }

        /* ---------- 响应式 ---------- */
        @media (max-width: 992px) {
            .feature-item {
                gap: 2rem;
            }

            .feature-item .feature-img {
                flex: 0 0 48%;
                max-width: 48%;
            }

            .feature-item .feature-img img {
                height: 220px;
            }

            .info-card .card-body h3 {
                font-size: 1.05rem;
            }

            .header-search {
                max-width: 320px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }

            .navbar-top {
                flex-wrap: wrap;
                padding: 0.75rem 0;
            }

            .header-search {
                display: none !important;
            }

            .navbar-brand {
                font-size: 1.15rem;
            }

            .cat-hero {
                min-height: 50vh;
                padding: 3rem 0 4rem;
            }

            .cat-hero h1 {
                font-size: 2rem;
            }

            .cat-hero .lead {
                font-size: 0.95rem;
                line-height: 1.7;
            }

            .feature-item {
                flex-direction: column !important;
                gap: 1.5rem;
                margin-bottom: 3rem;
            }

            .feature-item .feature-img {
                flex: 0 0 100%;
                max-width: 100%;
            }

            .feature-item .feature-img img {
                height: 200px;
            }

            .feature-item .feature-body {
                text-align: left !important;
            }

            .cta-card {
                padding: 2.5rem 1.5rem;
            }
        }

        @media (max-width: 576px) {
            .section {
                --section-padding: 3rem 0;
            }

            .navbar-brand {
                font-size: 1rem;
            }

            .navbar-brand .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 0.8rem;
            }

            .btn-glow {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }

            .nav-tabs .nav-link {
                padding: 0.35rem 0.85rem;
                font-size: 0.8rem;
            }

            .cat-hero h1 {
                font-size: 1.7rem;
            }

            .cat-hero .lead {
                font-size: 0.9rem;
            }

            .cat-hero .hero-meta {
                gap: 0.5rem;
            }

            .cat-hero .hero-meta span {
                font-size: 0.75rem;
            }

            .section-head p {
                font-size: 0.9rem;
            }

            .info-card .card-img {
                height: 150px;
            }

            .info-card .card-body {
                padding: 1.2rem;
            }

            .faq-section .accordion-button {
                font-size: 0.95rem;
                padding: 1rem;
            }

            .faq-section .accordion-body {
                padding: 0.4rem 1rem 1.2rem;
            }

            .cta-card {
                padding: 2rem 1rem;
            }

            .cta-card h2 {
                font-size: 1.4rem;
            }
        }

/* roulang page: category2 */
:root {
  --bg-primary: #050E1E;
  --bg-secondary: #0A1628;
  --primary: #0077FF;
  --accent: #00E0FF;
  --gold: #F7B500;
  --danger: #FF4D4F;
  --card-bg: rgba(255,255,255,0.05);
  --card-border: rgba(255,255,255,0.12);
  --highlight-border: rgba(0,224,255,0.4);
  --text-primary: #EAF2FF;
  --text-secondary: #9DB1CF;
  --text-muted: #6A7E9B;
  --fs-hero: clamp(2.2rem, 5vw, 3.5rem);
  --fs-h2: clamp(1.8rem, 3vw, 2.4rem);
  --fs-h3: 1.2rem;
  --fs-h4: 1.05rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --section-padding: clamp(4rem, 8vw, 6rem);
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 12px 32px rgba(0,0,0,0.35);
  --shadow-hover: 0 16px 48px rgba(0,224,255,0.12);
  --shadow-glow: 0 0 20px rgba(0,224,255,0.45);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'PingFang SC','Microsoft YaHei','Noto Sans CJK SC','Inter',sans-serif;
  font-size: var(--fs-body);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color .3s ease; }
a:hover { color: #fff; }
img { max-width: 100%; height: auto; }
button, input, textarea { font-family: inherit; }
.container { max-width: 1280px; padding-left: 1.25rem; padding-right: 1.25rem; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(5,14,30,0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.navbar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1.5rem;
  padding: 0.75rem 0;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text-primary);
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.navbar-brand:hover { color: var(--accent); }
.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 1rem;
  box-shadow: var(--shadow-glow);
}
.header-search {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-md);
  padding: 0.2rem;
  max-width: 380px;
  flex: 1;
  transition: border-color .3s ease;
}
.header-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,224,255,0.15);
}
.header-search input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  padding: 0.5rem 0.75rem;
  flex: 1;
  font-size: 0.9rem;
}
.header-search input::placeholder { color: var(--text-muted); }
.header-search button {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: opacity .3s ease;
}
.header-search button:hover { opacity: .85; }
.btn-glow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.4rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-glow);
  transition: transform .3s ease, box-shadow .3s ease, opacity .3s ease;
  white-space: nowrap;
}
.btn-glow:hover {
  transform: translateY(-2px);
  color: #fff;
  box-shadow: 0 0 28px rgba(0,224,255,0.6);
}
.btn-glow:active { transform: translateY(0); box-shadow: 0 0 12px rgba(0,224,255,0.3); }
.navbar-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 0.4rem 0;
}
.nav-tabs {
  display: flex;
  list-style: none;
  gap: 0.6rem;
  margin: 0;
  padding: 0.25rem 0;
  overflow-x: auto;
  scrollbar-width: none;
  border: none;
  flex-wrap: nowrap;
}
.nav-tabs::-webkit-scrollbar { display: none; }
.nav-tabs .nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.2rem;
  color: var(--text-secondary);
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: all .3s ease;
  background: transparent;
}
.nav-tabs .nav-link i { font-size: 0.85rem; opacity: .8; }
.nav-tabs .nav-link:hover {
  color: var(--accent);
  border-color: rgba(0,224,255,0.3);
  background: rgba(0,224,255,0.06);
}
.nav-tabs .nav-link.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(0,119,255,0.25), rgba(0,224,255,0.15));
  border-color: rgba(0,224,255,0.35);
  box-shadow: 0 0 16px rgba(0,224,255,0.12);
}

/* ===== Category Hero ===== */
.category-hero {
  position: relative;
  padding: clamp(4rem, 8vw, 6rem) 0;
  background:
    linear-gradient(135deg, rgba(5,14,30,0.97) 0%, rgba(5,14,30,0.85) 50%, rgba(0,119,255,0.22) 100%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  text-align: center;
  overflow: hidden;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.category-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,224,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,224,255,0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}
.category-hero::after {
  content: '';
  position: absolute;
  top: -60%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,224,255,0.18) 0%, transparent 70%);
  pointer-events: none;
}
.category-hero .container { position: relative; z-index: 2; }
.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 1rem;
  background: rgba(247,181,0,0.15);
  border: 1px solid rgba(247,181,0,0.35);
  color: #F7B500;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 999px;
  letter-spacing: 0.05em;
  margin-bottom: 1.2rem;
}
.category-hero h1 {
  font-size: var(--fs-hero);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 1.2rem;
  letter-spacing: 0.01em;
}
.category-hero .lead {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 640px;
  margin: 0 auto;
}

/* ===== Process Section ===== */
.process-section {
  padding: var(--section-padding) 0;
  position: relative;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.section-title {
  font-size: var(--fs-h2);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.75rem;
}
.section-subtitle {
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 620px;
}
.process-toc {
  position: sticky;
  top: 140px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.4rem;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  transition: border-color .3s ease;
}
.process-toc:hover { border-color: rgba(255,255,255,0.2); }
.process-toc h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 1rem;
}
.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.toc-list li { margin-bottom: 0.35rem; }
.toc-list a {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 0.9rem;
  color: var(--text-secondary);
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: all .3s ease;
  text-decoration: none;
}
.toc-list a .toc-num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.8;
  width: 20px;
  flex-shrink: 0;
}
.toc-list a:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
  border-left-color: rgba(0,224,255,0.4);
}
.toc-list a.active {
  color: var(--accent);
  background: rgba(0,224,255,0.08);
  border-left-color: var(--accent);
}
.process-timeline {
  position: relative;
  padding-left: 2.8rem;
}
.process-timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, rgba(0,224,255,0.55) 0%, rgba(0,119,255,0.12) 100%);
}
.timeline-item {
  position: relative;
  padding: 2rem 1.6rem;
  margin-bottom: 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  transition: border-color .3s ease, box-shadow .3s ease, transform .3s ease;
}
.timeline-item:hover {
  border-color: var(--highlight-border);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.75rem;
  top: 2.3rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 16px rgba(0,224,255,0.6);
  border: 3px solid var(--bg-primary);
}
.timeline-item::after {
  content: '';
  position: absolute;
  left: -2.75rem;
  top: 2.3rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(0,224,255,0.3);
  animation: pulse-dot 2.5s ease-in-out infinite;
}
@keyframes pulse-dot {
  0% { transform: scale(1); opacity: 1; }
  70% { transform: scale(2.2); opacity: 0; }
  100% { transform: scale(2.2); opacity: 0; }
}
.timeline-step {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}
.timeline-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0,119,255,0.3), rgba(0,224,255,0.2));
  border: 1px solid rgba(0,224,255,0.3);
  color: var(--accent);
  font-size: 1.1rem;
  flex-shrink: 0;
}
.timeline-step h3 {
  font-size: var(--fs-h3);
  font-weight: 700;
  margin: 0;
  line-height: 1.3;
}
.timeline-step .step-number {
  margin-left: auto;
  font-size: 2rem;
  font-weight: 800;
  color: rgba(255,255,255,0.08);
  line-height: 1;
  font-family: 'Inter',sans-serif;
}
.timeline-item p {
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.95rem;
}

/* ===== Resources Section ===== */
.resources-section {
  padding: var(--section-padding) 0;
  position: relative;
  background: var(--bg-primary);
}
.resource-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.6rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  margin-bottom: 1.25rem;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  transition: border-color .3s ease, box-shadow .3s ease, transform .3s ease;
}
.resource-card:hover {
  border-color: var(--highlight-border);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.resource-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0,119,255,0.35), rgba(0,224,255,0.2));
  border: 1px solid rgba(0,224,255,0.3);
  color: var(--accent);
  font-size: 1.4rem;
  flex-shrink: 0;
  box-shadow: 0 0 16px rgba(0,224,255,0.1);
}
.resource-body {
  flex: 1;
  min-width: 0;
}
.resource-body h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}
.resource-body p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 0;
}
.btn-resource {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.2rem;
  border: 1px solid rgba(0,224,255,0.35);
  color: var(--accent);
  background: rgba(0,224,255,0.05);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: all .3s ease;
}
.btn-resource:hover {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

/* ===== FAQ Section ===== */
.faq-section {
  padding: var(--section-padding) 0;
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255,255,255,0.04);
}
.accordion-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg) !important;
  margin-bottom: 1rem;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  overflow: hidden;
  transition: border-color .3s ease;
}
.accordion-item:hover { border-color: rgba(255,255,255,0.2); }
.accordion-item:has(.accordion-button:not(.collapsed)) {
  border-color: var(--highlight-border);
}
.accordion-button {
  background: transparent;
  color: var(--text-primary);
  font-size: var(--fs-h4);
  font-weight: 600;
  padding: 1.2rem 1.4rem;
  box-shadow: none !important;
  transition: color .3s ease, background .3s ease;
  border-radius: var(--radius-lg) !important;
}
.accordion-button:focus {
  box-shadow: none !important;
  background: rgba(255,255,255,0.03);
}
.accordion-button:not(.collapsed) {
  background: rgba(0,224,255,0.06);
  color: var(--accent);
}
.accordion-button::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  background: none;
  width: auto;
  height: auto;
  color: var(--accent);
  font-size: 0.9rem;
  transition: transform .3s ease;
}
.accordion-button:not(.collapsed)::after {
  transform: rotate(180deg);
}
.accordion-body {
  padding: 0 1.4rem 1.4rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ===== CTA Section ===== */
.cta-section {
  padding: var(--section-padding) 0;
  text-align: center;
  position: relative;
  background:
    radial-gradient(circle at 30% 20%, rgba(0,119,255,0.2) 0%, transparent 60%),
    radial-gradient(circle at 80% 80%, rgba(0,224,255,0.12) 0%, transparent 50%),
    var(--bg-primary);
  border-top: 1px solid rgba(255,255,255,0.05);
}
.cta-section h2 {
  font-size: var(--fs-h2);
  font-weight: 800;
  margin-bottom: 0.8rem;
}
.cta-section p {
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 2rem;
}
.cta-section .btn-glow {
  padding: 0.8rem 2.2rem;
  font-size: 1.05rem;
}

/* ===== Footer ===== */
.site-footer {
  background: #030A16;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 3rem 0 1.5rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  color: var(--text-primary);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.footer-brand i { color: var(--accent); }
.footer-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  max-width: 300px;
}
.footer-title {
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color .3s ease;
}
.footer-links a:hover { color: var(--accent); }
.footer-contact {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}
.footer-divider {
  border-color: rgba(255,255,255,0.08);
  margin: 2rem 0 1.25rem;
  opacity: 1;
}
.copyright {
  color: var(--text-muted);
  text-align: center;
  font-size: 0.85rem;
  margin: 0;
}

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
  .header-search { display: none !important; }
  .process-toc { position: relative; top: 0; margin-bottom: 2rem; }
  .process-timeline { padding-left: 2.2rem; }
  .timeline-item::before, .timeline-item::after { left: -2.15rem; }
  .resource-card { flex-wrap: wrap; }
}
@media (max-width: 767.98px) {
  .navbar-top { min-height: 64px; }
  .navbar-brand { font-size: 1.05rem; }
  .btn-glow { padding: 0.5rem 1rem; font-size: 0.9rem; }
  .category-hero { padding: 3.5rem 0; }
  .category-hero .lead { font-size: 1rem; }
  .process-timeline { padding-left: 1.8rem; }
  .timeline-item { padding: 1.4rem 1.2rem; }
  .timeline-item::before, .timeline-item::after { left: -1.75rem; }
  .timeline-step { flex-wrap: wrap; gap: 0.5rem; }
  .timeline-step .step-number { margin-left: 0; width: 100%; }
  .resource-card { gap: 1rem; padding: 1.2rem; }
  .resource-icon { width: 46px; height: 46px; font-size: 1.1rem; }
  .btn-resource { margin-top: 0.25rem; }
  .footer-brand { font-size: 1.05rem; }
}
@media (max-width: 575.98px) {
  .container { padding-left: 1rem; padding-right: 1rem; }
  .nav-tabs .nav-link { padding: 0.45rem 1rem; font-size: 0.88rem; }
  .category-hero h1 { font-size: 1.8rem; }
  .process-timeline { padding-left: 1.5rem; }
  .timeline-item::before, .timeline-item::after { left: -1.45rem; width: 14px; height: 14px; }
  .resource-card { flex-direction: column; align-items: flex-start; }
  .resource-body { width: 100%; }
  .btn-resource { width: 100%; justify-content: center; }
  .accordion-button { font-size: 0.95rem; padding: 1rem 1.1rem; }
  .accordion-body { padding: 0 1.1rem 1.1rem; }
}