/* roulang page: index */
:root {
            --primary: #0b1e33;
            --primary-2: #102a44;
            --accent: #00c2ff;
            --accent-2: #4f8bff;
            --accent-soft: rgba(0, 194, 255, 0.08);
            --bg: #f0f4f8;
            --bg-deep: #081624;
            --card: #ffffff;
            --text: #16283b;
            --muted: #5c7184;
            --border: #e2e9f0;
            --radius: 14px;
            --radius-lg: 22px;
            --shadow: 0 4px 24px rgba(11, 30, 51, 0.07);
            --shadow-lg: 0 12px 40px rgba(11, 30, 51, 0.12);
            --container: 1200px;
            --space: 80px;
            --transition: 0.3s ease;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            border: none;
            transition: all 0.3s ease;
            letter-spacing: 0.3px;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 18px rgba(0, 194, 255, 0.3);
        }
        .btn-primary:hover {
            background: #009ecb;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 194, 255, 0.4);
        }
        .btn-outline {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.5);
            color: #fff;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-dark {
            background: var(--primary);
            color: #fff;
        }
        .btn-dark:hover {
            background: #122a44;
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }
        .btn-lg {
            padding: 16px 38px;
            font-size: 15px;
        }

        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: var(--accent-soft);
            color: var(--accent-2);
            letter-spacing: 0.3px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 30, 51, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 30px;
        }
        .logo {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo::before {
            content: "";
            width: 10px;
            height: 10px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 12px rgba(0, 194, 255, 0.6);
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.8);
            transition: all 0.3s ease;
            position: relative;
        }
        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-link.active {
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(0, 194, 255, 0.35);
        }
        .header-cta {
            padding: 9px 22px;
            font-size: 13px;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            border-radius: 999px;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .header-cta:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--accent);
        }
        .nav-toggle {
            display: none;
            color: #fff;
            font-size: 22px;
            padding: 6px;
        }

        .hero {
            position: relative;
            min-height: 640px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            color: #fff;
            overflow: hidden;
        }
        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(8, 22, 36, 0.92) 0%, rgba(8, 22, 36, 0.75) 45%, rgba(8, 22, 36, 0.3) 100%);
        }
        .hero::after {
            content: "";
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg), transparent);
            z-index: 1;
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            width: 100%;
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 60px;
            align-items: center;
            padding: 76px 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(0, 194, 255, 0.14);
            border: 1px solid rgba(0, 194, 255, 0.3);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: #aeeaff;
            margin-bottom: 24px;
        }
        .hero-badge i {
            color: var(--accent);
        }
        .hero-title {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: 1px;
            margin-bottom: 18px;
        }
        .hero-title span {
            color: var(--accent);
        }
        .hero-subtitle {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.8;
            max-width: 520px;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 44px;
        }
        .hero-stats {
            display: flex;
            gap: 36px;
            flex-wrap: wrap;
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-num {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
            letter-spacing: 1px;
            margin-top: 4px;
            text-transform: uppercase;
        }
        .hero-console {
            background: rgba(11, 30, 51, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 18px;
            backdrop-filter: blur(16px);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
            overflow: hidden;
        }
        .console-header {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 14px 18px;
            background: rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .console-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #ff5f57;
        }
        .console-dot:nth-child(2) {
            background: #febc2e;
        }
        .console-dot:nth-child(3) {
            background: #28c840;
        }
        .console-title {
            margin-left: 10px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
            font-family: ui-monospace, "SF Mono", Menlo, monospace;
        }
        .console-body {
            padding: 18px;
        }
        .console-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
        }
        .console-row:last-child {
            border-bottom: none;
        }
        .console-row span:first-child {
            color: rgba(255, 255, 255, 0.55);
        }
        .console-row span:last-child {
            color: #fff;
            font-family: ui-monospace, "SF Mono", Menlo, monospace;
            font-weight: 600;
        }
        .status-live {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .status-live i {
            color: #28c840;
            font-size: 10px;
        }

        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: #fff;
        }
        .section-head {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 56px;
        }
        .section-tag {
            display: inline-block;
            padding: 5px 18px;
            border-radius: 999px;
            background: var(--accent-soft);
            color: var(--accent-2);
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: 0.5px;
            color: var(--primary);
            margin-bottom: 14px;
        }
        .section-desc {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 34px 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }
        .feature-card::after {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 80px;
            height: 80px;
            background: radial-gradient(circle, var(--accent-soft), transparent 70%);
            opacity: 0;
            transition: opacity 0.4s ease;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(0, 194, 255, 0.3);
        }
        .feature-card:hover::after {
            opacity: 1;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--accent-soft);
            color: var(--accent-2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 22px;
            transition: all 0.4s ease;
        }
        .feature-card:hover .feature-icon {
            background: var(--accent);
            color: #fff;
            transform: scale(1.05);
        }
        .feature-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary);
        }
        .feature-desc {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }

        .category-section {
            background: linear-gradient(135deg, #f5f8fc 0%, #eef3f8 100%);
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all 0.4s ease;
            display: block;
        }
        .category-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        .category-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .category-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .category-img img {
            transform: scale(1.06);
        }
        .category-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(8, 22, 36, 0.4), transparent);
        }
        .category-body {
            padding: 26px 26px 30px;
        }
        .category-body .tag {
            margin-bottom: 12px;
        }
        .category-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .category-desc {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: 18px;
        }
        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-2);
            transition: gap 0.3s ease;
        }
        .category-link:hover {
            gap: 12px;
        }

        .news-section {
            background: var(--bg);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 30px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all 0.4s ease;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(0, 194, 255, 0.3);
        }
        .news-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
        }
        .news-date {
            font-size: 13px;
            color: var(--muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .news-date i {
            font-size: 12px;
            color: var(--accent-2);
        }
        .news-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.5;
            margin-bottom: 12px;
        }
        .news-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            flex: 1;
        }
        .news-more {
            margin-top: 18px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-2);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.3s ease;
        }
        .news-card:hover .news-more {
            gap: 10px;
        }
        .empty-tip {
            text-align: center;
            padding: 60px 30px;
            color: var(--muted);
            font-size: 15px;
            background: var(--card);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border);
        }

        .stats-band {
            background: var(--bg-deep);
            color: #fff;
            padding: 70px 0;
            position: relative;
            overflow: hidden;
        }
        .stats-band::before {
            content: "";
            position: absolute;
            top: -60%;
            left: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 194, 255, 0.12), transparent 60%);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .stat-item {
            padding: 8px;
        }
        .stat-num {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            background: linear-gradient(135deg, var(--accent) 0%, #7cc4ff 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 8px;
            letter-spacing: 1px;
        }

        .steps-section {
            background: #fff;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-item {
            position: relative;
            padding: 38px 30px;
            background: var(--bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            transition: all 0.4s ease;
        }
        .step-item:hover {
            background: #fff;
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }
        .step-num {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 20px;
        }
        .step-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .step-desc {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }
        .step-line {
            position: absolute;
            top: 60px;
            right: -14px;
            width: 28px;
            height: 1px;
            background: var(--border);
        }
        .step-item:last-child .step-line {
            display: none;
        }

        .faq-section {
            background: var(--bg);
        }
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            margin-bottom: 16px;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .faq-item:hover {
            border-color: rgba(0, 194, 255, 0.4);
            box-shadow: var(--shadow);
        }
        .faq-question {
            padding: 20px 26px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .faq-question i {
            color: var(--accent-2);
            font-size: 14px;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 26px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            padding: 0 26px 22px;
            max-height: 300px;
        }

        .cta-band {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
            color: #fff;
            padding: 70px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-band::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 194, 255, 0.15), transparent 60%);
        }
        .cta-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 40px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .cta-content {
            max-width: 600px;
        }
        .cta-title {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-desc {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .site-footer {
            background: #0b1e33;
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-logo {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-logo::before {
            content: "";
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 10px rgba(0, 194, 255, 0.5);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: color 0.3s ease, padding-left 0.3s ease;
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 6px;
        }
        .footer-col p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            padding: 4px 0;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-title {
                font-size: 36px;
            }
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-console {
                max-width: 520px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                background: rgba(11, 30, 51, 0.96);
            }
            .main-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--primary);
                flex-direction: column;
                padding: 20px 24px;
                gap: 12px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s ease;
                z-index: 99;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-link {
                width: 100%;
                text-align: center;
                padding: 12px;
                font-size: 15px;
            }
            .header-cta {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .hero {
                min-height: 560px;
            }
            .hero-inner {
                padding: 50px 20px;
            }
            .hero-title {
                font-size: 30px;
            }
            .hero-stats {
                gap: 24px;
            }
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .cta-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 26px;
            }
            .hero-subtitle {
                font-size: 14px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .section-title {
                font-size: 22px;
            }
            .category-body {
                padding: 20px;
            }
            .news-card {
                padding: 22px;
            }
            .stat-num {
                font-size: 32px;
            }
            .faq-question {
                font-size: 15px;
                padding: 18px 20px;
            }
            .faq-answer {
                padding: 0 20px;
            }
            .faq-item.open .faq-answer {
                padding: 0 20px 18px;
            }
            .cta-title {
                font-size: 24px;
            }
            .cta-buttons {
                flex-direction: column;
                width: 100%;
            }
            .cta-buttons .btn {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: article */
:root {
            --primary: #0b1f2e;
            --primary-2: #102d42;
            --accent: #00c9a7;
            --accent-dark: #00a98b;
            --gold: #f0b90b;
            --bg: #f4f7f9;
            --card: #ffffff;
            --text: #12283a;
            --muted: #61758a;
            --border: #e3eaf0;
            --radius: 18px;
            --radius-sm: 12px;
            --shadow: 0 12px 30px rgba(2, 22, 35, 0.08);
            --shadow-lg: 0 20px 45px rgba(2, 22, 35, 0.12);
            --transition: 0.25s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input,
        textarea {
            font-family: inherit;
            font-size: 16px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        h1,
        h2,
        h3,
        h4 {
            line-height: 1.3;
            font-weight: 700;
        }
        .site-header {
            background: var(--primary);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }
        .logo {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
            background: linear-gradient(90deg, var(--accent), var(--gold));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            position: relative;
        }
        .logo:hover {
            opacity: 0.9;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
            margin-left: auto;
        }
        .nav-link {
            color: rgba(255, 255, 255, 0.72);
            font-size: 15px;
            font-weight: 500;
            padding: 6px 2px;
            border-bottom: 2px solid transparent;
            transition: color var(--transition), border-color var(--transition);
        }
        .nav-link:hover,
        .nav-link.active {
            color: #fff;
            border-bottom-color: var(--accent);
        }
        .nav-link.active {
            color: var(--accent);
            font-weight: 600;
        }
        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--gold);
            color: #0b1f2e;
            font-size: 14px;
            font-weight: 700;
            padding: 10px 20px;
            border-radius: 999px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 14px rgba(240, 185, 11, 0.35);
            white-space: nowrap;
        }
        .header-cta:hover {
            background: #ffc733;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(240, 185, 11, 0.45);
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            color: #fff;
            font-size: 20px;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.16);
        }
        .page-banner {
            background: linear-gradient(135deg, rgba(4, 24, 39, 0.94), rgba(6, 42, 61, 0.84)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 72px 0 60px;
            position: relative;
            border-bottom: 3px solid rgba(0, 201, 167, 0.4);
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 18px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.6);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            opacity: 0.5;
        }
        .banner-title {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            max-width: 800px;
            line-height: 1.35;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 201, 167, 0.2);
            border: 1px solid rgba(0, 201, 167, 0.4);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
        }
        .article-wrap {
            padding: 50px 0 60px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 360px;
            gap: 40px;
            align-items: start;
        }
        .article-main {
            background: var(--card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px;
            border: 1px solid var(--border);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 18px;
            margin-bottom: 20px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
        }
        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            color: var(--muted);
            font-size: 14px;
        }
        .meta-item i {
            color: var(--accent);
        }
        .meta-item .badge {
            background: rgba(0, 201, 167, 0.12);
            color: var(--accent-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 999px;
        }
        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: #2a3a4a;
        }
        .article-content h2 {
            font-size: 24px;
            margin: 36px 0 16px;
            padding-left: 14px;
            border-left: 4px solid var(--accent);
            color: var(--primary);
        }
        .article-content h3 {
            font-size: 20px;
            margin: 28px 0 12px;
            color: var(--primary);
        }
        .article-content p {
            margin-bottom: 18px;
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 20px 22px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content img {
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
            margin: 24px 0;
        }
        .article-content blockquote {
            background: var(--bg);
            border-left: 4px solid var(--accent);
            padding: 16px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            color: var(--muted);
            font-style: italic;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }
        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 12px 14px;
            text-align: left;
        }
        .article-content table th {
            background: var(--primary);
            color: #fff;
        }
        .article-content a {
            color: var(--accent-dark);
            border-bottom: 1px solid rgba(0, 201, 167, 0.4);
        }
        .article-content a:hover {
            color: var(--accent);
        }
        .not-found-box {
            text-align: center;
            padding: 60px 30px;
        }
        .not-found-box h2 {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--muted);
            margin-bottom: 24px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            padding: 12px 28px;
            border-radius: 999px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 6px 20px rgba(0, 201, 167, 0.3);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(0, 201, 167, 0.4);
        }
        .article-tags {
            margin-top: 30px;
            padding-top: 22px;
            border-top: 1px solid var(--border);
        }
        .article-tags h4 {
            font-size: 15px;
            color: var(--muted);
            font-weight: 600;
            margin-bottom: 10px;
        }
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-item {
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--muted);
            font-size: 13px;
            padding: 4px 14px;
            border-radius: 999px;
            transition: background var(--transition), color var(--transition), border-color var(--transition);
        }
        .tag-item:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .widget {
            background: var(--card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 26px;
        }
        .widget-title {
            font-size: 18px;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .widget-title i {
            color: var(--accent);
        }
        .widget-list {
            list-style: none;
        }
        .widget-list li {
            padding: 10px 0;
            border-bottom: 1px dashed var(--border);
            font-size: 14px;
        }
        .widget-list li:last-child {
            border-bottom: none;
        }
        .widget-list li a {
            color: var(--muted);
            display: flex;
            align-items: center;
            gap: 10px;
            transition: color var(--transition), padding-left var(--transition);
        }
        .widget-list li a:hover {
            color: var(--accent-dark);
            padding-left: 6px;
        }
        .widget-list li a i {
            color: var(--accent);
            font-size: 12px;
        }
        .contact-widget {
            background: linear-gradient(135deg, var(--primary), var(--primary-2));
            color: #fff;
            border: none;
        }
        .contact-widget .widget-title {
            color: #fff;
        }
        .contact-widget .widget-title i {
            color: var(--gold);
        }
        .contact-widget p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 10px;
        }
        .widget-contact-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            width: 100%;
            background: var(--gold);
            color: var(--primary);
            font-size: 15px;
            font-weight: 700;
            padding: 12px 0;
            border-radius: 10px;
            margin-top: 14px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 6px 18px rgba(240, 185, 11, 0.35);
        }
        .widget-contact-btn:hover {
            background: #ffc733;
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(240, 185, 11, 0.45);
        }
        .related-section {
            padding: 60px 0 70px;
            background: #eef2f6;
        }
        .section-head {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-title {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
            position: relative;
            display: inline-block;
        }
        .section-title::after {
            content: '';
            display: block;
            width: 56px;
            height: 4px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--accent), var(--gold));
            margin: 14px auto 0;
        }
        .section-sub {
            color: var(--muted);
            font-size: 15px;
            margin-top: 12px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(0, 201, 167, 0.4);
        }
        .related-card img {
            width: 100%;
            height: 190px;
            object-fit: cover;
        }
        .related-card-content {
            padding: 20px 22px 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }
        .related-card .tag-item {
            align-self: flex-start;
        }
        .related-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.5;
            transition: color var(--transition);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card:hover .related-card-title {
            color: var(--accent-dark);
        }
        .related-card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            color: var(--muted);
            font-size: 13px;
            margin-top: auto;
        }
        .related-card-meta i {
            color: var(--accent);
            margin-right: 4px;
        }
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, rgba(4, 24, 39, 0.95), rgba(6, 42, 61, 0.88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            position: relative;
        }
        .cta-box {
            text-align: center;
            color: #fff;
        }
        .cta-title {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .cta-desc {
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            max-width: 620px;
            margin: 0 auto 30px;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--gold);
            color: var(--primary);
            font-size: 16px;
            font-weight: 700;
            padding: 14px 36px;
            border-radius: 999px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 8px 24px rgba(240, 185, 11, 0.5);
        }
        .cta-btn:hover {
            background: #ffc733;
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(240, 185, 11, 0.6);
        }
        .cta-features {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 30px;
            margin-top: 34px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
        }
        .cta-features span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .cta-features i {
            color: var(--accent);
        }
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.7);
            padding: 54px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            background: linear-gradient(90deg, var(--accent), var(--gold));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            margin-bottom: 10px;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 5px;
        }
        .footer-col p {
            font-size: 14px;
            margin-bottom: 8px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            flex-wrap: wrap;
            gap: 8px;
        }
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .banner-title {
                font-size: 30px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }
            .main-nav {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--primary);
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 10px 24px 16px;
                display: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: 0 16px 30px rgba(0, 0, 0, 0.25);
            }
            .main-nav.open {
                display: flex;
            }
            .nav-link {
                padding: 12px 0;
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .nav-toggle {
                display: inline-flex;
            }
            .header-cta {
                display: none;
            }
            .page-banner {
                padding: 52px 0 44px;
            }
            .banner-title {
                font-size: 24px;
            }
            .article-main {
                padding: 24px;
            }
            .article-content h2 {
                font-size: 20px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .cta-title {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .banner-title {
                font-size: 20px;
            }
            .article-main {
                padding: 18px;
                border-radius: 14px;
            }
            .article-meta {
                gap: 10px;
                flex-direction: column;
                align-items: flex-start;
            }
            .section-title {
                font-size: 24px;
            }
            .related-card img {
                height: 160px;
            }
            .cta-features {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0b1a2e;
            --primary-light: #142a47;
            --primary-dark: #060e1a;
            --accent: #2d8cff;
            --accent-deep: #1a6bff;
            --accent-soft: #eaf3ff;
            --success: #00c389;
            --warning: #f59e0b;
            --bg: #f3f6fb;
            --bg-white: #ffffff;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --max-width: 1200px;
            --header-h: 76px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 26, 46, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            height: var(--header-h);
            display: flex;
            align-items: center;
        }

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

        .logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .logo::before {
            content: "";
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent), var(--success));
            flex-shrink: 0;
            box-shadow: 0 4px 14px rgba(45, 140, 255, 0.35);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            color: rgba(255, 255, 255, 0.78);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 10px 18px;
            border-radius: 40px;
            transition: var(--transition);
            position: relative;
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-link.active {
            color: #fff;
            background: rgba(45, 140, 255, 0.28);
            box-shadow: inset 0 0 0 1px rgba(45, 140, 255, 0.4);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), var(--accent-deep));
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: 40px;
            box-shadow: 0 4px 18px rgba(45, 140, 255, 0.35);
            transition: var(--transition);
            white-space: nowrap;
        }

        .header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(45, 140, 255, 0.45);
        }

        .header-cta i {
            font-size: 0.85rem;
        }

        .nav-toggle {
            display: none;
            color: #fff;
            font-size: 1.3rem;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.1);
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.2);
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: calc(var(--header-h) + 96px) 0 96px;
            background-size: cover;
            background-position: center;
            background-color: var(--primary-dark);
            color: #fff;
            isolation: isolate;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(11, 26, 46, 0.92) 15%, rgba(11, 26, 46, 0.65) 65%, rgba(11, 26, 46, 0.45) 100%);
            z-index: -1;
        }

        .hero-content {
            max-width: 820px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(45, 140, 255, 0.2);
            border: 1px solid rgba(45, 140, 255, 0.35);
            color: #cfe4ff;
            font-size: 0.82rem;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 40px;
            letter-spacing: 0.03em;
            margin-bottom: 28px;
        }

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

        .hero-content h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.01em;
            margin-bottom: 20px;
        }

        .hero-content p {
            font-size: 1.08rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 36px;
            max-width: 720px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: 40px;
            padding: 14px 30px;
            font-size: 0.92rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(45, 140, 255, 0.5);
            outline-offset: 2px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-deep));
            color: #fff;
            box-shadow: 0 6px 22px rgba(45, 140, 255, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(45, 140, 255, 0.45);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(8px);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.16);
            border-color: rgba(255, 255, 255, 0.35);
            transform: translateY(-3px);
        }

        /* ===== Stats Band ===== */
        .stats-band {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            padding: 32px 0;
        }

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

        .stat-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            border-radius: var(--radius-md);
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .stat-item:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .stat-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
            color: #fff;
        }

        .stat-icon.blue {
            background: linear-gradient(135deg, #2d8cff, #1a6bff);
        }
        .stat-icon.green {
            background: linear-gradient(135deg, #00c389, #00a06b);
        }
        .stat-icon.orange {
            background: linear-gradient(135deg, #f59e0b, #f07700);
        }
        .stat-icon.purple {
            background: linear-gradient(135deg, #8b5cf6, #6c3ce6);
        }

        .stat-text strong {
            display: block;
            font-size: 1.05rem;
            color: var(--text-main);
            line-height: 1.3;
        }

        .stat-text span {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ===== Section 基础 ===== */
        .section {
            padding: 88px 0;
        }

        .section-alt {
            background: var(--bg-white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .section-head {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 6px 14px;
            border-radius: 40px;
            letter-spacing: 0.04em;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .section-head h2 {
            font-size: clamp(1.6rem, 2.8vw, 2.2rem);
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.75;
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-card {
            position: relative;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 28px 28px;
            text-align: center;
            transition: var(--transition);
            overflow: hidden;
        }

        .step-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--success));
            opacity: 0;
            transition: var(--transition);
        }

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

        .step-card:hover::before {
            opacity: 1;
        }

        .step-num {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--accent), var(--accent-deep));
            color: #fff;
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 6px 18px rgba(45, 140, 255, 0.3);
        }

        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-main);
        }

        .step-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* ===== Terminal Section ===== */
        .terminal-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .terminal-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .terminal-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
            border-color: rgba(45, 140, 255, 0.3);
        }

        .terminal-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 1.4rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            transition: var(--transition);
        }

        .terminal-card:hover .terminal-icon {
            background: var(--accent);
            color: #fff;
            transform: scale(1.05);
        }

        .terminal-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .terminal-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .terminal-badge {
            display: inline-block;
            margin-top: 14px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--success);
            background: rgba(0, 195, 137, 0.1);
            padding: 4px 12px;
            border-radius: 30px;
        }

        /* ===== Prep Section (图文) ===== */
        .prep-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

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

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

        .prep-image:hover img {
            transform: scale(1.03);
        }

        .prep-content h2 {
            font-size: clamp(1.5rem, 2.6vw, 2rem);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 20px;
            color: var(--text-main);
        }

        .prep-list {
            display: grid;
            gap: 16px;
        }

        .prep-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 16px 18px;
            transition: var(--transition);
        }

        .prep-list li:hover {
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            border-color: rgba(45, 140, 255, 0.25);
        }

        .prep-list i {
            color: var(--accent);
            font-size: 1rem;
            margin-top: 4px;
        }

        .prep-list strong {
            display: block;
            font-size: 0.95rem;
            color: var(--text-main);
            margin-bottom: 2px;
        }

        .prep-list span {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.55;
        }

        /* ===== Security Section ===== */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .security-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 30px 24px;
            text-align: center;
            transition: var(--transition);
        }

        .security-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-5px);
        }

        .security-card i {
            width: 58px;
            height: 58px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(45, 140, 255, 0.1), rgba(0, 195, 137, 0.1));
            color: var(--accent);
            font-size: 1.4rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
        }

        .security-card h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .security-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 0;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(45, 140, 255, 0.3);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text-main);
            cursor: pointer;
            transition: var(--transition);
        }

        .faq-question:hover {
            color: var(--accent);
        }

        .faq-question i {
            color: var(--accent);
            font-size: 0.9rem;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            border-top: 0 solid var(--border);
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            border-top-width: 1px;
        }

        .faq-answer p {
            padding: 18px 24px;
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -60%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(45, 140, 255, 0.15);
            filter: blur(80px);
        }

        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(0, 195, 137, 0.12);
            filter: blur(70px);
        }

        .cta-wrap {
            position: relative;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
            z-index: 1;
        }

        .cta-wrap h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 18px;
        }

        .cta-wrap p {
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 36px;
            font-size: 1rem;
        }

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

        .cta-buttons .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-deep));
            box-shadow: 0 8px 28px rgba(45, 140, 255, 0.4);
        }

        .cta-buttons .btn-outline {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
        }

        .cta-buttons .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.5);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-logo {
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .footer-logo::before {
            content: "";
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--accent), var(--success));
        }

        .footer-brand p {
            font-size: 0.88rem;
            max-width: 300px;
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 1rem;
            color: #fff;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            margin-bottom: 10px;
            transition: var(--transition);
            padding: 4px 0;
        }

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

        .footer-col p {
            font-size: 0.88rem;
            margin-bottom: 10px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 0;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }

            .header-cta {
                display: none;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--primary);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 20px 24px;
                gap: 4px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: transform 0.4s ease, opacity 0.3s ease, visibility 0.3s;
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .nav-link {
                padding: 14px 16px;
                border-radius: 10px;
                font-size: 0.95rem;
            }

            .nav-link.active {
                background: rgba(45, 140, 255, 0.2);
            }

            .page-hero {
                padding: calc(var(--header-h) + 72px) 0 72px;
            }

            .hero-content p {
                font-size: 0.98rem;
            }

            .prep-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .prep-image {
                max-height: 320px;
            }

            .terminal-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .stats-grid {
                gap: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 36px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .logo {
                font-size: 1.05rem;
            }

            .hero-content h1 {
                font-size: 1.65rem;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .btn {
                width: 100%;
            }

            .steps-grid {
                grid-template-columns: 1fr;
            }

            .security-grid {
                grid-template-columns: 1fr;
            }

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

            .stat-item {
                padding: 14px 16px;
            }

            .section {
                padding: 56px 0;
            }

            .section-head {
                margin-bottom: 36px;
            }

            .faq-question {
                padding: 16px 18px;
                font-size: 0.9rem;
            }

            .faq-answer p {
                padding: 14px 18px;
                font-size: 0.86rem;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }