/* roulang page: index */
/* ========== Design Variables ========== */
        :root {
            --primary: #1e5eff;
            --primary-dark: #0d3fc9;
            --primary-light: #6b9aff;
            --secondary: #ff6b35;
            --secondary-light: #ff9b70;
            --accent: #7c5cff;
            --bg: #f4f7fc;
            --bg-dark: #0e1320;
            --bg-card: #ffffff;
            --text: #16223b;
            --text-weak: #5b6b85;
            --text-footer: #a6b3c8;
            --border: #e3e9f2;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 8px rgba(14, 24, 53, .06);
            --shadow-md: 0 6px 24px rgba(14, 24, 53, .08);
            --shadow-lg: 0 16px 48px rgba(14, 24, 53, .12);
            --transition: all .25s ease;
            --container: 1200px;
            --header-h: 70px;
            --section-space: 72px;
        }

        /* ========== Reset / Base ========== */
        *, *::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;
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            display: block;
            border: none;
        }

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

        ul, ol {
            list-style: none;
        }

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

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

        h1, h2, h3, h4, h5 {
            line-height: 1.35;
            font-weight: 700;
            color: var(--text);
        }

        ::selection {
            background: rgba(31, 94, 255, .18);
        }

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

        .section {
            padding: 76px 0;
        }

        /* section gap */
        .section + .section {
            border-top: 1px solid var(--border);
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(227, 233, 242, .8);
            box-shadow: 0 1px 8px rgba(14, 24, 53, .03);
            height: var(--header-h);
            transition: box-shadow .3s;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(14, 24, 53, .08);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 17px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: .2px;
            white-space: nowrap;
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(31, 94, 255, .28);
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.15;
        }

        .logo-text strong {
            font-size: 17px;
            letter-spacing: .3px;
        }

        .logo-text span {
            font-size: 11px;
            color: var(--text-weak);
            letter-spacing: 1px;
            font-weight: 500;
            margin-top: 1px;
        }

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

        .main-nav a {
            padding: 10px 18px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            transition: var(--transition);
            white-space: nowrap;
        }

        .main-nav a:hover {
            background: rgba(30, 94, 255, .08);
            color: var(--primary);
        }

        .main-nav a.active {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff;
            box-shadow: 0 6px 16px rgba(31, 94, 255, .24);
            font-weight: 600;
        }

        .nav-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff !important;
            border-radius: 40px;
            padding: 10px 24px !important;
            font-weight: 700;
            box-shadow: 0 8px 24px rgba(31, 94, 255, .24);
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-btn:hover {
            box-shadow: 0 12px 32px rgba(31, 94, 255, .3);
            transform: translateY(-2px);
        }

        .hamburger {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(30, 94, 255, .08);
            color: var(--primary);
            font-size: 18px;
            align-items: center;
            justify-content: center;
        }

        /* ========== Mobile Nav ========== */
        .mobile-nav {
            display: none;
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 16px;
            line-height: 1;
            padding: 16px 34px;
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff;
            box-shadow: 0 8px 24px rgba(31, 94, 255, .24);
        }

        .btn-primary:hover {
            box-shadow: 0 12px 40px rgba(31, 94, 255, .36);
            transform: translateY(-3px);
            color: #fff;
        }

        .btn-secondary {
            background: rgba(30, 94, 255, .1);
            color: var(--primary);
            border-color: transparent;
        }

        .btn-secondary:hover {
            background: rgba(30, 94, 255, .18);
            transform: translateY(-3px);
            color: var(--primary-dark);
        }

        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(0, 0, 0, .12);
        }

        .btn-light:hover {
            background: #f0f5ff;
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, .2);
            color: var(--primary-dark);
        }

        .btn-outline-light {
            border: 2px solid rgba(255, 255, 255, .7);
            color: #fff;
        }

        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, .12);
            transform: translateY(-3px);
        }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            background: var(--bg-dark);
            overflow: hidden;
            padding: 120px 0 100px;
            min-height: 560px;
            display: flex;
            align-items: center;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: .5;
            z-index: 0;
        }

        .hero-bg-gradient {
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, rgba(10, 14, 26, .92) 20%, rgba(14, 19, 32, .75) 50%, rgba(22, 30, 48, .35) 100%);
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
            color: #fff;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .2);
            backdrop-filter: blur(8px);
            border-radius: 40px;
            padding: 8px 18px;
            font-size: 13px;
            font-weight: 600;
            color: #e6ecff;
            margin-bottom: 26px;
            letter-spacing: .5px;
        }

        .hero-badge i {
            color: #ffd166;
        }

        .hero h1 {
            color: #fff;
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: .5px;
            margin-bottom: 22px;
        }

        .hero h1 span {
            color: #fff;
            background: linear-gradient(90deg, #5b9bff, #9c88ff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-desc {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 32px;
            max-width: 560px;
        }

        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 30px;
        }

        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 28px;
            margin-top: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, .65);
        }

        .hero-trust .trust-item {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero-trust i {
            color: #37d67a;
        }

        /* hero image bullet card */
        .hero-img-wrap {
            position: relative;
            z-index: 2;
            display: block;
        }

        .hero-card {
            background: rgba(255, 255, 255, .1);
            backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, .25);
            border-radius: 20px;
            padding: 22px;
            color: #fff;
            min-width: 340px;
            box-shadow: 0 24px 64px rgba(0, 0, 0, .3);
        }

        .hero-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 18px;
        }

        .hero-card-header .date-pill {
            background: rgba(255, 255, 255, .16);
            border-radius: 30px;
            padding: 5px 16px;
            font-size: 12px;
            font-weight: 600;
        }

        .hero-card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .hero-card-list {
            list-style: none;
            padding: 0;
        }

        .hero-card-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, .9);
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .hero-card-list li:last-child {
            border-bottom: none;
        }

        .hero-card-list li i {
            color: #ffd166;
            width: 20px;
            text-align: center;
        }

        .hero-rating {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid rgba(255, 255, 255, .12);
            margin-top: 10px;
        }

        .hero-rating .rating-num {
            font-size: 28px;
            font-weight: 800;
            color: #ffd166;
        }

        .hero-rating small {
            font-size: 12px;
            color: rgba(255, 255, 255, .6);
        }

        .hero-meter {
            height: 6px;
            border-radius: 6px;
            background: rgba(255, 255, 255, .2);
            margin-top: 10px;
            overflow: hidden;
        }

        .hero-meter-fill {
            height: 100%;
            width: 86%;
            border-radius: 6px;
            background: linear-gradient(90deg, #ffd166, #ff9b54);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 48px;
            align-items: center;
        }

        /* ========== Section Title ========== */
        .section-head {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 56px;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(30, 94, 255, .1);
            color: var(--primary);
            border-radius: 40px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: .5px;
            text-transform: uppercase;
        }

        .section-head h2 {
            font-size: clamp(28px, 3.5vw, 38px);
            font-weight: 800;
            letter-spacing: .5px;
            margin-bottom: 14px;
        }

        .section-head h2 span {
            color: var(--primary);
        }

        .section-head p {
            color: var(--text-weak);
            font-size: 16px;
            line-height: 1.8;
        }

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

        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 26px;
            border: 1px solid var(--border);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
            border-color: rgba(30, 94, 255, .25);
        }

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

        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            background: linear-gradient(135deg, rgba(30, 94, 255, .15), rgba(124, 92, 255, .1));
            color: var(--primary);
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.75;
        }

        .feature-card .feature-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(30, 94, 255, .09);
            color: var(--primary);
            border-radius: 30px;
            padding: 4px 14px;
            font-size: 12px;
            font-weight: 700;
            margin-top: 16px;
        }

        /* ========== Sports Section ========== */
        .sports-section {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .sports-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 18px;
        }

        .sport-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 26px 14px;
            text-align: center;
            transition: var(--transition);
        }

        .sport-item:hover {
            border-color: rgba(30, 94, 255, .3);
            box-shadow: var(--shadow-sm);
            transform: translateY(-4px);
        }

        .sport-item .icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            color: #fff;
            font-size: 22px;
            box-shadow: 0 4px 12px rgba(31, 94, 255, .24);
        }

        .sport-item span {
            font-size: 14px;
            font-weight: 700;
            display: block;
            margin-bottom: 4px;
        }

        .sport-item small {
            color: var(--text-weak);
            font-size: 12px;
        }

        /* ========== Latest Section ========== */
        .latest-section {
            background: var(--bg);
        }

        .latest-flex {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .latest-principal {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
        }

        .latest-principal:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
        }

        .latest-principal .cover {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }

        .latest-principal .content {
            padding: 28px 30px 32px;
        }

        .latest-principal h3 {
            font-size: 22px;
            margin-bottom: 12px;
            line-height: 1.5;
        }

        .latest-principal p {
            color: var(--text-weak);
            font-size: 15px;
        }

        .post-meta {
            display: flex;
            align-items: center;
            gap: 18px;
            color: var(--text-weak);
            font-size: 13px;
            margin-top: 18px;
            flex-wrap: wrap;
        }

        .post-meta .cat {
            background: rgba(124, 92, 255, .12);
            color: #5b3de8;
            border-radius: 30px;
            padding: 3px 12px;
            font-weight: 600;
            font-size: 12px;
        }

        .post-meta .date {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .latest-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .list-item {
            background: var(--bg-card);
            border-radius: 14px;
            border: 1px solid var(--border);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .list-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: rgba(30, 94, 255, .2);
            transform: translateX(4px);
        }

        .list-item .info {
            flex: 1;
            min-width: 0;
        }

        .list-item .info h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 6px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .list-item .info p {
            color: var(--text-weak);
            font-size: 13px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .list-item .badge {
            flex-shrink: 0;
            font-size: 12px;
            background: rgba(30, 94, 255, .09);
            color: var(--primary);
            padding: 4px 10px;
            border-radius: 40px;
            font-weight: 600;
        }

        /* empty state */
        .empty-state {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px;
            text-align: center;
            color: var(--text-weak);
            border: 1px dashed var(--border);
        }

        .empty-state i {
            font-size: 32px;
            color: #c4d2e3;
            margin-bottom: 12px;
            display: block;
        }

        /* ========== Steps / Flow ========== */
        .steps-section {
            background: linear-gradient(135deg, #0e1320 0%, #1a2340 60%, #192b4d 100%);
            position: relative;
        }

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

        .steps-section .section-head {
            position: relative;
            z-index: 1;
        }

        .steps-section .section-head h2 {
            color: #fff;
        }

        .steps-section .section-head h2 span {
            background: linear-gradient(90deg, #6ba6ff, #9c88ff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .steps-section .section-head p {
            color: rgba(255, 255, 255, .7);
        }

        .steps-section .eyebrow {
            background: rgba(255, 255, 255, .16);
            color: #d6e3ff;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
            z-index: 1;
        }

        .step-card {
            text-align: center;
            padding: 40px 24px 36px;
            background: rgba(255, 255, 255, .07);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 20px;
            backdrop-filter: blur(10px);
            transition: var(--transition);
        }

        .step-card:hover {
            background: rgba(255, 255, 255, .12);
            transform: translateY(-8px);
            border-color: rgba(255, 255, 255, .2);
        }

        .step-num {
            width: 52px;
            height: 52px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: linear-gradient(135deg, #4a8bff, #9c6bff);
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 24px rgba(80, 120, 255, .4);
        }

        .step-card h3 {
            color: #fff;
            font-size: 18px;
            margin-bottom: 12px;
            font-weight: 700;
        }

        .step-card p {
            color: rgba(255, 255, 255, .7);
            font-size: 14px;
            line-height: 1.7;
        }

        /* ========== Popular Topics ========== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .topic-card {
            background: var(--bg-card);
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .topic-card .cover {
            aspect-ratio: 16/10;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .topic-card .cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(0, 0, 0, .45));
        }

        .topic-card .cover .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(0, 0, 0, .55);
            backdrop-filter: blur(10px);
            color: #fff;
            border-radius: 30px;
            padding: 5px 14px;
            font-size: 12px;
            font-weight: 600;
            z-index: 1;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .topic-card .body {
            padding: 24px 26px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .topic-card .body h3 {
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 12px;
            line-height: 1.45;
        }

        .topic-card .body p {
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.8;
            flex: 1;
        }

        .topic-card .body .topic-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-size: 15px;
            font-weight: 700;
            margin-top: 20px;
            transition: var(--transition);
        }

        .topic-card .body .topic-link:hover {
            gap: 14px;
            color: var(--primary-dark);
        }

        /* ========== Guide Panel ========== */
        .connect-section {
            background: var(--bg-card);
            border-radius: 28px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            margin-top: 30px;
        }

        .connect-left {
            padding: 52px 48px;
        }

        .connect-left h2 {
            font-size: 28px;
            margin-bottom: 18px;
            letter-spacing: .3px;
        }

        .connect-left p {
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 24px;
        }

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

        .tips-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            margin-bottom: 14px;
            font-size: 15px;
            color: var(--text);
        }

        .tips-list li i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 3px;
        }

        .connect-right {
            background: linear-gradient(135deg, #0b132b, #152959);
            padding: 52px 44px;
            position: relative;
            overflow: hidden;
        }

        .connect-right::after {
            content: '';
            position: absolute;
            right: -60px;
            top: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(130, 120, 255, .3), transparent 70%);
        }

        .connect-right h3 {
            color: #fff;
            font-size: 22px;
            margin-bottom: 10px;
        }

        .connect-right .quote {
            color: rgba(255, 255, 255, .85);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .connect-right .cta-line {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .connect-right .small-note {
            margin-top: 18px;
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
        }

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

        .faq-grid {
            max-width: 850px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: 14px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item.active {
            border-color: rgba(30, 94, 255, .35);
            box-shadow: var(--shadow-sm);
        }

        .faq-q {
            width: 100%;
            text-align: left;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 26px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            cursor: pointer;
            transition: var(--transition);
        }

        .faq-q:hover {
            background: rgba(30, 94, 255, .02);
            color: var(--primary);
        }

        .faq-q .icon {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(30, 94, 255, .1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--primary);
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }

        .faq-a-inner {
            padding: 0 26px 24px;
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.85;
        }

        .faq-item.active .faq-q .icon {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            transform: rotate(45deg);
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            padding: 90px 0;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') no-repeat center center / cover;
            opacity: .2;
        }

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

        .cta-inner h2 {
            color: #fff;
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 20px;
            letter-spacing: .5px;
        }

        .cta-inner .cta-sub {
            color: rgba(255, 255, 255, .75);
            font-size: 17px;
            line-height: 1.9;
            margin-bottom: 30px;
        }

        .cta-stats {
            display: flex;
            justify-content: center;
            gap: 36px;
            margin-top: 48px;
            flex-wrap: wrap;
        }

        .cta-stat-item {
            text-align: center;
        }

        .cta-stat-item strong {
            display: block;
            font-family: sans-serif;
            font-size: 32px;
            font-weight: 800;
            background: linear-gradient(90deg, #6ba6ff, #9c88ff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .cta-stat-item span {
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #0a0e17;
            color: var(--text-footer);
            padding: 68px 0 0;
            border-top: 1px solid rgba(255, 255, 255, .04);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr .8fr .8fr 1.2fr;
            gap: 48px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, .06);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 18px;
        }

        .footer-brand .footer-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
        }

        .footer-grid p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-footer);
            max-width: 320px;
        }

        .footer-grid h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: var(--text-footer);
            font-size: 14px;
        }

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

        .footer-info {
            background: rgba(255, 255, 255, .02);
            padding: 25px 0 30px;
            margin-top: 20px;
            border-radius: 14px;
            text-align: center;
            color: rgba(255, 255, 255, .5);
            font-size: 13px;
        }

        .footer-info .tech-meta {
            display: flex;
            justify-content: center;
            gap: 28px;
            flex-wrap: wrap;
            margin: 10px 0 6px;
        }

        .footer-info span {
            font-size: 12px;
            color: rgba(255, 255, 255, .4);
        }

        .footer-disclaimer {
            background: rgba(255, 255, 255, .03);
            text-align: center;
            padding: 18px 24px;
            font-size: 12px;
            color: rgba(255, 255, 255, .35);
            line-height: 1.8;
            margin-top: 20px;
            border-radius: 10px;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

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

        @media (max-width: 920px) {
            .hero-grid {
                grid-template-columns: 1fr;
            }

            .hero-card {
                min-width: 100%;
            }

            .main-nav {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .mobile-nav {
                display: none;
                flex-direction: column;
                padding: 14px 24px 20px;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
            }

            .mobile-nav.open {
                display: flex;
            }

            .mobile-nav a {
                padding: 13px 8px;
                font-size: 15px;
                font-weight: 600;
                border-radius: 10px;
                border-bottom: 1px solid rgba(227, 233, 242, .5);
            }

            .mobile-nav a.active {
                background: rgba(30, 94, 255, .1);
                color: var(--primary);
                box-shadow: none;
            }

            .mobile-nav .nav-btn-mu {
                background: linear-gradient(135deg, var(--primary), var(--accent));
                color: #fff;
                padding: 12px 24px;
                border-radius: 40px;
                justify-content: center;
                margin-top: 10px;
                border-bottom: none;
            }

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

            .connect-section {
                grid-template-columns: 1fr;
            }

            .latest-flex {
                grid-template-columns: 1fr;
            }

            .section {
                padding: 48px 0;
            }
        }

        @media (max-width: 640px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }

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

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

            .sports-grid {
                grid-template-columns: 2fr 2fr 1fr;
                gap: 10px;
            }

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

            .sport-item {
                padding: 14px 6px;
            }

            .hero {
                padding: 90px 0;
            }

            .btn {
                padding: 14px 26px;
                width: 100%;
                max-width: 320px;
            }

            .hero-btns {
                flex-direction: column;
            }

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

            .connect-left {
                padding: 32px 26px;
            }

            .connect-right {
                padding: 36px 26px;
            }

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

            .logo-text {
                display: none;
            }

            .footer-brand h3 {
                font-size: 14px;
            }
        }

/* roulang page: article */
:root {
            --primary: #e50914;
            --primary-dark: #b20710;
            --accent: #f5c518;
            --dark: #1a1a2e;
            --darker: #0f0f1a;
            --light: #f8f9fa;
            --gray: #6c757d;
            --border: rgba(0, 0, 0, .08);
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 10px 40px rgba(0, 0, 0, .08);
            --transition: all .25s ease;
            --container: 1200px;
        }
        *,
        *::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', sans-serif;
            background: var(--light);
            color: #222;
            line-height: 1.7;
            font-size: 16px;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(229, 9, 20, .4);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid rgba(0, 0, 0, .05);
            box-shadow: 0 2px 20px rgba(0, 0, 0, .04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), #ff4d4f);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            box-shadow: 0 4px 14px rgba(229, 9, 20, .3);
        }
        .logo-text {
            font-weight: 800;
            font-size: 20px;
            color: var(--dark);
            letter-spacing: -.5px;
            line-height: 1.2;
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .main-nav a {
            padding: 8px 16px;
            border-radius: 8px;
            font-weight: 500;
            font-size: 15px;
            color: #444;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--primary);
            background: rgba(229, 9, 20, .05);
        }
        .main-nav a.active {
            color: var(--primary);
            font-weight: 700;
            background: rgba(229, 9, 20, .08);
        }
        .article-hero {
            background: linear-gradient(135deg, #1a1a2e 0%, var(--darker) 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: .2;
        }
        .article-hero .container {
            position: relative;
            z-index: 1;
        }
        .article-category {
            color: var(--accent);
            font-weight: 700;
            font-size: 14px;
            letter-spacing: 2px;
            text-transform: uppercase;
            display: inline-block;
            background: rgba(245, 197, 24, .1);
            padding: 4px 14px;
            border-radius: 20px;
            border: 1px solid rgba(245, 197, 24, .3);
            margin-bottom: 16px;
        }
        .article-title {
            color: #fff;
            font-size: clamp(32px, 5vw, 48px);
            line-height: 1.3;
            font-weight: 800;
            max-width: 800px;
            margin-bottom: 20px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            color: rgba(255, 255, 255, .6);
            font-size: 14px;
        }
        .article-meta i {
            margin-right: 6px;
            color: var(--accent);
        }
        .article-main {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 60px 0;
        }
        .article-card {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 50px;
            max-width: 800px;
        }
        .article-card h1,
        .article-card h2,
        .article-card h3,
        .article-card h4 {
            color: var(--dark);
            margin: 28px 0 16px;
            line-height: 1.4;
        }
        .article-card h2 {
            font-size: 26px;
        }
        .article-card h3 {
            font-size: 20px;
        }
        .article-card p {
            margin-bottom: 18px;
            color: #333;
        }
        .article-card ul,
        .article-card ol {
            margin-bottom: 18px;
            padding-left: 24px;
        }
        .article-card ul {
            list-style: disc;
        }
        .article-card ol {
            list-style: decimal;
        }
        .article-card li {
            margin-bottom: 8px;
            line-height: 1.8;
        }
        .article-card a {
            color: var(--primary);
            text-decoration: underline;
        }
        .article-card img {
            border-radius: 12px;
            margin: 24px 0;
        }
        .article-card blockquote {
            border-left: 4px solid var(--primary);
            background: #fef5f5;
            padding: 12px 20px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
            color: #555;
        }
        .article-card table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 20px;
        }
        .article-card th,
        .article-card td {
            border: 1px solid #eee;
            padding: 10px 14px;
            text-align: left;
        }
        .article-card th {
            background: #f8f9fa;
            font-weight: 700;
        }
        .content-not-found {
            text-align: center;
            padding: 60px 20px;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .content-not-found i {
            font-size: 56px;
            color: var(--gray);
            margin-bottom: 20px;
        }
        .content-not-found h2 {
            font-size: 28px;
            color: var(--dark);
            margin-bottom: 12px;
        }
        .content-not-found p {
            color: var(--gray);
            margin-bottom: 24px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(229, 9, 20, .25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(229, 9, 20, .3);
        }
        .article-bottom-cta {
            background: linear-gradient(135deg, var(--darker), #2d2d52);
            padding: 70px 0;
            text-align: center;
            position: relative;
        }
        .article-bottom-cta .container {
            position: relative;
            z-index: 1;
        }
        .article-bottom-cta h2 {
            color: #fff;
            font-size: 32px;
            margin-bottom: 14px;
        }
        .article-bottom-cta p {
            color: rgba(255, 255, 255, .7);
            font-size: 18px;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .btn-accent {
            background: var(--accent);
            color: var(--dark);
            box-shadow: 0 4px 20px rgba(245, 197, 24, .3);
        }
        .btn-accent:hover {
            background: #e0b314;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(245, 197, 24, .4);
        }
        .article-related {
            padding: 60px 0;
        }
        .article-related h2 {
            text-align: center;
            font-size: 28px;
            color: var(--dark);
            margin-bottom: 40px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            display: block;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, .12);
        }
        .related-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }
        .related-card-body {
            padding: 20px;
        }
        .related-card h3 {
            font-size: 16px;
            color: var(--dark);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .related-card p {
            font-size: 14px;
            color: var(--gray);
            line-height: 1.6;
        }
        .site-footer {
            background: var(--darker);
            color: #fff;
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .footer-logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), #ff4d4f);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
        }
        .footer-grid h3 {
            font-size: 20px;
            font-weight: 700;
        }
        .footer-grid p {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
            line-height: 1.7;
        }
        .footer-grid h4 {
            font-size: 16px;
            margin-bottom: 16px;
            color: rgba(255, 255, 255, .9);
            font-weight: 600;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-info {
            padding: 24px 0;
            text-align: center;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-info p {
            color: rgba(255, 255, 255, .6);
            font-size: 14px;
        }
        .tech-meta {
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            margin-top: 10px;
            color: rgba(255, 255, 255, .4);
            font-size: 13px;
        }
        .footer-disclaimer {
            text-align: center;
            padding: 20px 0 24px;
            color: rgba(255, 255, 255, .5);
            font-size: 12px;
            line-height: 1.8;
        }
        .footer-disclaimer i {
            margin-right: 6px;
            color: var(--accent);
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-direction: column;
                height: auto;
                padding: 16px 0;
                gap: 12px;
            }
            .main-nav {
                width: 100%;
                flex-wrap: wrap;
                justify-content: center;
            }
            .main-nav a {
                padding: 6px 12px;
                font-size: 14px;
            }
            .article-hero {
                padding: 40px 0 30px;
            }
            .article-card {
                padding: 24px;
            }
            .article-card h2 {
                font-size: 22px;
            }
            .article-bottom-cta h2 {
                font-size: 24px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .logo-text {
                font-size: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .tech-meta {
                flex-direction: column;
                gap: 6px;
            }
            .article-title {
                font-size: 24px;
            }
            .article-meta {
                gap: 10px;
                font-size: 13px;
            }
            .article-card {
                padding: 20px;
            }
            .btn {
                padding: 10px 18px;
                font-size: 14px;
            }
        }
        .scroll-top {
            display: none;
        }

/* roulang page: category1 */
:root {
            --primary: #00c9b7;
            --primary-dark: #00a899;
            --secondary: #ff6b35;
            --accent: #0056ff;
            --dark: #0e1726;
            --dark-2: #1a2540;
            --light: #f4f7fb;
            --white: #ffffff;
            --text: #16213e;
            --text-light: #4e5d78;
            --border: #e5eaf1;
            --radius: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(14, 23, 38, .06);
            --shadow: 0 8px 30px rgba(14, 23, 38, .08);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, .1);
            --transition: all .3s cubic-bezier(.4, 0, .2, 1);
            --font-main: 'Inter', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
        }
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--light);
            font-weight: 400;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul {
            list-style: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-sm {
            max-width: 960px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 15px;
            padding: 13px 30px;
            border: none;
            cursor: pointer;
            text-decoration: none;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn i {
            font-size: 14px;
            transition: transform .3s ease;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--dark);
            box-shadow: 0 4px 15px rgba(0, 201, 183, .3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 168, 153, .4);
        }
        .btn-outline {
            border-color: var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: var(--dark);
            box-shadow: 0 4px 15px rgba(0, 201, 183, .25);
        }
        .btn-white {
            background: var(--white);
            color: var(--dark);
        }
        .btn-white:hover {
            background: #f0f9f9;
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 4px 15px rgba(255, 107, 53, .3);
        }
        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 107, 53, .4);
        }

        /* 顶部信息条 */
        .topbar {
            background: var(--dark);
            color: #fff;
            font-size: 13px;
            padding: 8px 0;
        }
        .topbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 4px 16px;
        }
        .topbar-left {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, .8);
        }
        .topbar-right {
            display: flex;
            align-items: center;
            gap: 18px;
        }
        .topbar-right span {
            color: rgba(255, 255, 255, .84);
        }
        .topbar-right i {
            color: var(--primary);
            margin-right: 4px;
        }
        .topbar .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #4ade80;
            display: inline-block;
            margin-right: 6px;
            box-shadow: 0 0 12px rgba(74, 222, 128, .6);
            animation: pulse 1.5s infinite;
        }
        @keyframes pulse {
            0% {
                box-shadow: 0 0 4px rgba(74, 222, 128, .4);
            }
            50% {
                box-shadow: 0 0 12px rgba(74, 222, 128, .8);
            }
            100% {
                box-shadow: 0 0 4px rgba(74, 222, 128, .4);
            }
        }

        /* ===== Header ===== */
        .site-header {
            background: var(--white);
            position: sticky;
            top: 0;
            z-index: 999;
            box-shadow: 0 1px 0 rgba(0, 0, 0, .05);
            transition: box-shadow .3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, .10);
        }
        .header-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .brand-icon-wrapper {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, #00c9b7 0%, #008f86 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--dark);
            font-weight: 800;
            box-shadow: 0 4px 10px rgba(0, 201, 183, .25);
            position: relative;
            overflow: hidden;
        }
        .brand-icon-wrapper i {
            font-size: 18px;
        }
        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.3px;
            line-height: 1.2;
        }
        .brand-text span {
            color: var(--primary);
        }
        .brand-sub {
            font-size: 12px;
            color: #8796ad;
            font-weight: 500;
            margin-top: 1px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a {
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            border-radius: 40px;
            position: relative;
            gap: 6px;
            display: inline-flex;
            align-items: center;
            border: 1px solid transparent;
        }
        .main-nav a i {
            font-size: 13px;
            color: var(--text-light);
        }
        .main-nav a:hover {
            background: rgba(0, 201, 183, 0.08);
            color: var(--primary-dark);
        }
        .main-nav a:hover i {
            color: var(--primary);
        }
        .main-nav a.active {
            color: var(--primary-dark);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 1px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-left: 12px;
        }
        .header-cta .btn-link {
            color: var(--text-light);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
        }
        .header-cta .btn-link:hover {
            color: var(--primary-dark);
        }
        .header-cta .btn {
            padding: 10px 24px;
            font-size: 13px;
        }
        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: var(--white);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            gap: 5px;
        }
        .mobile-toggle span {
            width: 18px;
            height: 2px;
            background: var(--dark);
            border-radius: 4px;
            transition: var(--transition);
            display: block;
        }

        /* Banner 页面横幅 */
        .page-banner {
            background: linear-gradient(135deg, #0e1726 0%, #0f2d4a 40%, #0f2f3e 100%);
            position: relative;
            padding: 68px 0 90px;
            color: #fff;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.3;
            z-index: 0;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--light) 20%, transparent);
            z-index: 1;
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .banner-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, .72);
            margin-bottom: 22px;
            flex-wrap: wrap;
        }
        .banner-breadcrumb a {
            color: rgba(255, 255, 255, .8);
            transition: color .2s;
        }
        .banner-breadcrumb a:hover {
            color: #4ade80;
        }
        .banner-breadcrumb i {
            font-size: 10px;
            color: rgba(255, 255, 255, .5);
        }
        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 201, 183, .2);
            border: 1px solid rgba(0, 201, 183, .3);
            padding: 6px 18px;
            border-radius: 32px;
            font-size: 13px;
            font-weight: 500;
            color: #4ade80;
            margin-bottom: 22px;
            letter-spacing: .5px;
        }
        .banner-tag i {
            font-size: 12px;
        }
        .page-banner h1 {
            font-size: 42px;
            line-height: 1.25;
            font-weight: 800;
            max-width: 620px;
            letter-spacing: -1px;
        }
        .page-banner h1 span {
            color: #4ade80;
        }
        .banner-desc {
            font-size: 16px;
            line-height: 1.9;
            color: rgba(255, 255, 255, .82);
            max-width: 640px;
            margin-top: 18px;
            color: #84b6c5;
        }
        .banner-metrics {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            margin-top: 24px;
        }
        .metric-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .12);
            border-radius: 32px;
            padding: 6px 14px;
            font-size: 12px;
            color: rgba(255, 255, 255, .85);
        }

        /* ===== 主体结构 ===== */
        .main-wrapper {
            position: relative;
            z-index: 2;
            margin-top: -32px;
            padding-bottom: 70px;
        }
        .section-panel {
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 48px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
            margin-bottom: 24px;
            border: 1px solid rgba(255, 255, 255, .7);
        }

        /* 指南入口 */
        .section-intro {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 40px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -0.5px;
            line-height: 1.25;
            color: var(--dark);
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.8;
        }
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 24px;
        }
        .guide-card {
            background: #f8fafc;
            border-radius: 16px;
            padding: 32px 24px;
            border: 1px solid var(--border);
            text-align: left;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            display: block;
        }
        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(14, 23, 38, .08);
            border-color: rgba(0, 201, 183, .5);
        }
        .guide-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #fff;
            margin-bottom: 18px;
        }
        .guide-card .gc-1 {
            background: linear-gradient(135deg, #00c9b7, #009b8c);
        }
        .guide-card .gc-2 {
            background: linear-gradient(135deg, #ff9500, #fd6e00);
        }
        .guide-card .gc-3 {
            background: linear-gradient(135deg, #5c5cff, #3a3ad4);
        }
        .guide-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--dark);
        }
        .guide-card h3 a {
            color: inherit;
        }
        .guide-card h3 a:hover {
            color: var(--primary-dark);
        }
        .guide-card p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-light);
            margin: 12px 0 14px;
            min-height: 52px;
        }
        .guide-card a {
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary-dark);
            font-weight: 600;
        }
        .guide-card a:hover {
            color: var(--primary);
        }

        /* 网络自检流程 */
        .checklist-section {
            background: #fafcff;
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            border: 1px solid var(--border);
            margin-top: 24px;
        }
        .checklist-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            margin-bottom: 26px;
        }
        .checklist-header h3 {
            font-size: 22px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .checklist-header h3 i {
            color: var(--primary);
        }
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .step-item {
            position: relative;
            padding: 20px 16px;
            background: #fff;
            border-radius: 14px;
            border-left: 3px solid var(--primary);
            box-shadow: 0 2px 10px rgba(14, 23, 38, .04);
        }
        .step-num {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--dark);
            font-size: 13px;
            font-weight: 700;
            align-items: center;
            justify-content: center;
            display: inline-flex;
            margin-bottom: 10px;
        }
        .step-item h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 7px;
        }
        .step-item p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 8px;
        }
        .step-item .step-tag {
            font-size: 12px;
            display: inline-block;
            padding: 3px 10px;
            border-radius: 6px;
            background: rgba(0, 201, 183, .12);
            color: var(--primary-dark);
            font-weight: 600;
        }

        /* 环境建议 */
        .status-box {
            display: flex;
            align-items: center;
            gap: 24px;
            border-radius: 18px;
            background: linear-gradient(135deg, rgba(0, 201, 183, .12), rgba(0, 201, 183, .04));
            border: 1px solid rgba(0, 201, 183, .25);
            padding: 28px 36px;
            margin-top: 32px;
        }
        .status-box-icon {
            width: 52px;
            height: 52px;
            background: rgba(0, 201, 183, .2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-dark);
            font-size: 22px;
            flex-shrink: 0;
        }
        .status-box-content h4 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text);
        }
        .status-box-content p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-light);
        }

        /* 设置清单 */
        .setting-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-top: 24px;
        }
        .setting-item {
            background: #fff;
            border-radius: 12px;
            padding: 20px 22px;
            border: 1px solid var(--border);
            display: flex;
            gap: 14px;
            align-items: flex-start;
            transition: var(--transition);
        }
        .setting-item:hover {
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(0, 0, 0, .05);
        }
        .setting-item i {
            color: var(--primary);
            margin-top: 4px;
            font-size: 15px;
        }
        .setting-item h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--dark);
        }
        .setting-item p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* 前端对比 */
        .section-toolbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 24px;
        }
        .section-toolbar h2 {
            font-size: 26px;
            font-weight: 800;
            color: var(--dark);
        }
        .device-type {
            display: inline-flex;
            gap: 6px;
            background: #f1f5f9;
            border-radius: 50px;
            padding: 4px;
        }
        .device-type button {
            border: none;
            background: transparent;
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-light);
            cursor: pointer;
            transition: var(--transition);
        }
        .device-type button.active {
            background: #ffffff;
            color: var(--dark);
            box-shadow: 0 2px 8px rgba(14, 23, 38, .08);
        }

        .type-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            margin-top: 24px;
        }
        .type-card {
            border-radius: 16px;
            border: 1px solid var(--border);
            padding: 28px;
            background: linear-gradient(135deg, #fafcff 0%, #f8fafc 100%);
            transition: var(--transition);
        }
        .type-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .type-badge {
            font-size: 11px;
            display: inline-block;
            background: rgba(0, 201, 183, .13);
            color: var(--primary-dark);
            border-radius: 4px;
            padding: 2px 8px;
            letter-spacing: 1px;
            font-weight: 600;
        }
        .type-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            margin-top: 10px;
        }
        .type-card .type-meta {
            font-size: 13px;
            color: #8a97aa;
            margin-bottom: 12px;
        }
        .type-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .type-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            color: var(--primary-dark);
            font-weight: 600;
            font-size: 13px;
        }
        .type-link:hover {
            gap: 9px;
            color: var(--primary);
        }
        .type-card .type-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .type-tag {
            background: #f1f5f9;
            font-size: 11px;
            padding: 3px 10px;
            border-radius: 4px;
            color: #64748b;
            font-weight: 500;
        }

        /* 比较表 */
        .compare-table {
            margin-top: 32px;
        }
        .compare-table table {
            width: 100%;
            border-collapse: collapse;
            overflow: hidden;
            border-radius: 14px;
        }
        .compare-table td,
        .compare-table th {
            padding: 14px 18px;
            border-bottom: 1px solid #eef1f5;
            text-align: left;
            font-size: 14px;
        }
        .compare-table th {
            background: #f8fafc;
            font-weight: 600;
            color: var(--dark);
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .compare-table .text-green {
            color: #22c55e;
        }
        .compare-table .text-gray {
            color: #94a3b8;
        }

        /* 浏览场景图 */
        .cover-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
            background: #f8fafd;
            border-radius: 18px;
            overflow: hidden;
            margin-bottom: 32px;
            border: 1px solid var(--border);
        }
        .cover-card-img {
            position: relative;
            border-radius: 14px;
            overflow: hidden;
            line-height: 0;
        }
        .cover-card-img img {
            width: 100%;
            max-height: 440px;
            object-fit: cover;
            transition: var(--transition);
        }
        .cover-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(14, 23, 38, .6));
            pointer-events: none;
        }
        .cover-card-text {
            padding: 0 20px;
            text-align: left;
        }

        /* FAQ 手风琴 */
        .faq-wrap {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: 14px;
            background: #fff;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 201, 183, .4);
        }
        .faq-item-header {
            padding: 20px 24px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: #fff;
        }
        .faq-item-header h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
        }
        .faq-item-header h4 i {
            font-size: 18px;
            margin-right: 10px;
            color: var(--primary);
        }
        .faq-item .faq-plus {
            color: var(--primary-dark);
            font-size: 18px;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item[open] .faq-plus i {
            transform: rotate(135deg);
        }
        .faq-item-body {
            padding: 0 24px 20px 24px;
        }
        .faq-item-body p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.85;
        }
        .faq-item-body ul {
            padding: 0;
            margin: 0;
            list-style: none;
        }
        .faq-item-body ul li {
            padding: 4px 0;
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.8;
            display: flex;
            gap: 8px;
        }
        .faq-item-body ul li i {
            color: var(--primary);
            font-size: 12px;
            margin-top: 6px;
        }
        details.faq-item summary::-webkit-details-marker {
            display: none;
        }
        details.faq-item summary {
            list-style: none;
            cursor: pointer;
        }
        details.faq-item summary::-moz-list-bullet {
            list-style: none;
        }
        details.faq-item[open] {
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }
        details.faq-item[open] .faq-item-header {
            border-bottom: 1px solid #f0f4f8;
        }

        /* ===== CTA 区块 ===== */
        .cta-banner {
            background: linear-gradient(135deg, #0e1726 0%, #0b3f3f 70%, #0c6e63 100%);
            border-radius: var(--radius-lg);
            padding: 60px 56px;
            position: relative;
            overflow: hidden;
            text-align: center;
            margin-top: 24px;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.14;
        }
        .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-content h2 {
            color: #fff;
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .cta-content p {
            color: rgba(255, 255, 255, .8);
            max-width: 680px;
            margin: 0 auto 28px;
            font-size: 15px;
            line-height: 1.9;
        }
        .cta-buttons {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: var(--dark);
            color: #aab6c8;
            margin-top: 40px;
            border-top: 2px solid rgba(255, 255, 255, .04);
        }
        .site-footer .container {
            padding-top: 48px;
            padding-bottom: 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }
        .footer-logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, #00c9b7, #007c74);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            font-size: 15px;
            box-shadow: 0 4px 10px rgba(0, 201, 183, .2);
            flex-shrink: 0;
        }
        .footer-brand h3 {
            color: #ffffff;
            font-size: 19px;
            font-weight: 700;
            letter-spacing: -0.3px;
            line-height: 1.3;
        }
        .site-footer p {
            font-size: 14px;
            line-height: 1.8;
            color: #8b9ab0;
        }
        .footer-grid>div:first-child p {
            margin-top: 12px;
        }
        .footer-grid h4 {
            color: #ffffff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-grid h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 26px;
            height: 2px;
            background: #00c9b7;
            border-radius: 2px;
        }
        .footer-links li {
            padding: 3px 0;
        }
        .footer-links a {
            color: #8b9ab0;
            font-size: 14px;
            transition: all .2s;
        }
        .footer-links a:hover {
            color: #00c9b7;
            padding-left: 4px;
        }
        .footer-info {
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, .06);
            padding-top: 18px;
            font-size: 13px;
        }
        .footer-info p {
            margin-bottom: 8px;
        }
        .tech-meta {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: #75869c;
        }
        .tech-meta span {
            color: #75869c;
        }
        .footer-disclaimer {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-top: 24px;
            border: 1px solid rgba(255, 255, 255, .08);
            background: rgba(255, 255, 255, .02);
            border-radius: 10px;
            padding: 16px 18px;
            font-size: 13px;
            color: #8b9ab0;
            line-height: 1.7;
        }
        .footer-disclaimer i {
            color: #f59e0b;
            margin-top: 5px;
            font-size: 14px;
            flex-shrink: 0;
        }

        /* 面包屑回退 */
        .breadcrumb-bottom {
            padding: 24px 0;
        }

        /* ====== 响应式 ====== */
        @media (max-width: 992px) {
            .main-nav {
                display: none;
            }
            .header-cta {
                display: none;
            }
            .mobile-toggle {
                display: flex;
                margin-left: auto;
            }
            .main-nav {
                position: fixed;
                top: 74px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px 20px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(0);
                box-shadow: 0 12px 24px rgba(0, 0, 0, .12);
                opacity: 1;
                transition: opacity .3s ease;
                display: none;
                margin: 0;
            }
            .main-nav.open {
                display: flex;
                height: auto;
                opacity: 1;
            }
            .main-nav a {
                width: 100%;
                padding: 12px 8px;
                border-radius: 8px;
                font-size: 16px;
            }
            .main-nav a.active::after {
                display: none;
            }
            .page-banner {
                padding: 48px 0 72px;
            }
            .page-banner h1 {
                font-size: 34px;
            }
            .topbar {
                display: none;
            }
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .cover-card {
                grid-template-columns: 1fr;
            }
            .cover-card-text {
                padding: 0 25px 25px;
            }
            .section-panel {
                padding: 40px 32px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
        }
        .navbar-mobile {
            display: flex;
        }
        .navbar-mobile a {
            padding: 12px 0;
            border-bottom: 1px solid #f0f2f5;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }
            .param-row {
                grid-template-columns: 1fr;
            }
            .section-panel {
                padding: 28px 20px;
                box-shadow: 0 4px 16px rgba(0, 0, 0, .04);
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .type-grid {
                grid-template-columns: 1fr;
            }
            .steps {
                grid-template-columns: 1fr;
            }
            .compare-table {
                overflow-x: auto;
            }
            .compare-table table {
                min-width: 680px;
            }
            .setting-list {
                grid-template-columns: 1fr;
            }
            .section-toolbar {
                align-items: flex-start;
                flex-direction: column;
            }
            .section-title {
                font-size: 26px;
            }
            .device-type button {
                padding: 8px 12px;
                font-size: 12px;
            }
            .btn {
                padding: 12px 22px;
                font-size: 14px;
            }
            .status-box {
                flex-direction: column;
                text-align: center;
                gap: 14px;
                padding: 24px 20px;
            }
            .checklist-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-grid h4 {
                margin-bottom: 10px;
            }
            .cta-banner {
                padding: 36px 28px;
            }
            .page-banner {
                padding: 40px 0 60px;
            }
            .banner-breadcrumb {
                font-size: 12px;
                margin-bottom: 14px;
            }
            .metric-chip {
                font-size: 11px;
                padding: 4px 10px;
            }
        }
        @media (max-width: 520px) {
            .section-title {
                font-size: 22px;
            }
            .section-subtitle {
                font-size: 14px;
            }
            .page-banner h1 {
                font-size: 25px;
            }
            .brand-text {
                font-size: 17px;
            }
            .guide-card {
                padding: 24px 20px;
            }
            .status-box {
                padding: 18px 14px;
                flex-direction: column;
            }
            .section-panel {
                padding: 24px 16px;
            }
            .footer-grid {
                gap: 20px;
            }
            .tech-meta {
                flex-direction: column;
                gap: 4px;
            }
        }

        /* 额外收尾 */
        .mobile-toggle.open i.fa-x {
            display: block;
        }
        .mobile-toggle.open i.fa-bars {
            display: none;
        }
        .mobile-toggle i {
            font-size: 18px;
            color: var(--dark);
        }
        /* 左侧边栏双列表格 */
        .two-column-list {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        @media(max-width:960px) {
            .two-column-list {
                flex-direction: column;
                gap: 12px;
            }
        }
        .text-card-flex {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .avatar-symbol {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(0, 201, 183, .15);
            color: #00a899;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            flex-shrink: 0;
        }
        .text-link-tag {
            font-size: 13px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: #00a899;
        }
        .text-link-tag:hover {
            gap: 8px;
            color: #00897c;
        }
        .pagination-rank {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .pagination-rank .num {
            color: #cbd5e1;
            font-weight: 700;
            width: 24px;
        }
        .divider {
            height: 1px;
            background: linear-gradient(to right, transparent, rgba(0, 0, 0, .08), transparent);
            margin: 24px 0;
        }
        @media(min-width: 992px) {
            .main-nav {
                position: relative;
                top: auto;
                display: flex;
                flex-direction: row;
                align-items: center;
                background: transparent;
                padding: 0;
                border: none;
                box-shadow: none;
                opacity: 1;
            }
            .navbar-mobile {
                display: none;
            }
        }

        .mobile-overlay {
            display: none;
        }
        .table-responsive {
            overflow-x: auto;
        }

.navbar-mobile {
                display: none;
                width: 100%;
                border-top: 1px solid #f0f4f8;
            }
            .navbar-mobile .main-nav {
                display: flex;
                flex-direction: column;
                padding: 16px 24px;
            }
            .navbar-mobile .main-nav a {
                width: 100%;
                padding: 14px 8px;
                border-radius: 8px;
                font-size: 15px;
                font-weight: 500;
                border-bottom: 1px solid #f0f4f8;
            }
            .navbar-mobile .main-nav a:last-child {
                border-bottom: none;
            }
            .navbar-mobile .main-nav a:hover {
                background: rgba(228, 240, 255, .3);
            }
            .navbar-mobile .main-nav a.active {
                color: var(--primary-dark);
                background: rgba(0, 201, 183, .06);
                font-weight: 600;
            }
            @media (max-width: 991px) {
                .header-content {
                    flex-wrap: nowrap;
                }
                .main-nav {
                    display: none !important;
                }
                .navbar-mobile {
                    display: block;
                }
                .navbar-mobile .main-nav {
                    display: flex;
                }
            }
            @media (min-width: 992px) {
                .navbar-mobile {
                    display: none !important;
                }
                .main-nav {
                    display: flex !important;
                }
            }
            .mobile-toggle {
                display: flex;
                flex-direction: column;
                background: #f9fbfc;
            }
            .mobile-toggle i.fa-xmark {
                display: none;
            }
            .mobile-toggle.open i.fa-bars {
                display: none;
            }
            .mobile-toggle.open i.fa-xmark {
                display: block;
            }

/* roulang page: category2 */
:root {
    --primary: #c73b3b;
    --primary-dark: #8f1f2c;
    --primary-rgb: 199, 59, 59;
    --accent: #e6a23c;
    --dark: #0f1320;
    --dark-2: #171d30;
    --dark-3: #1e2742;
    --card-bg: #1a2238;
    --text: #e8ebf5;
    --muted: #9ba6be;
    --border-line: rgba(255,255,255,.07);
    --shadow-sm: 0 4px 24px rgba(0, 0, 0, .3);
    --shadow-md: 0 10px 36px rgba(0, 0, 0, .42);
    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --font-main: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family: var(--font-main);
    background: var(--dark);
    color: var(--text);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
img {
    max-width: 100%;
    display: block;
    border: 0;
}
a {
    color: inherit;
    text-decoration: none;
    transition: color .3s ease;
}
ul, ol {
    list-style: none;
}
button, input {
    font-family: inherit;
    border: 0;
    outline: none;
    background: none;
}
.container {
    width: min(1200px, 92%);
    margin: 0 auto;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 999px;
    padding: 13px 30px;
    font-size: 15px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all .3s ease;
    white-space: nowrap;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 22px rgba(var(--primary-rgb), .35);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 32px rgba(var(--primary-rgb), .5);
}
.btn-outline {
    border: 1px solid rgba(255,255,255,.28);
    color: #fff;
    backdrop-filter: blur(6px);
    background: rgba(255,255,255,.04);
}
.btn-outline:hover {
    background: rgba(255,255,255,.12);
    border-color: rgba(255,255,255,.6);
    transform: translateY(-2px);
}
.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(var(--primary-rgb), .16);
    border: 1px solid rgba(var(--primary-rgb), .35);
    color: #ffc1c1;
    font-size: 13px;
    font-weight: 600;
    padding: 7px 18px;
    border-radius: 999px;
    margin-bottom: 18px;
}
.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    line-height: 1.3;
    background: linear-gradient(118deg, #fff 20%, #c5cdf2 90%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: #fff;
    margin-bottom: 14px;
}
.section-sub {
    font-size: 16px;
    color: var(--muted);
    max-width: 720px;
}
.big-section {
    padding: 100px 0;
}
.eyebrow {
    font-size: 14px;
    color: var(--accent);
    letter-spacing: .12em;
    font-weight: 600;
    margin-bottom: 8px;
    display: inline-block;
}

/* header & nav */
.top-bar {
    background: rgba(17, 21, 36, .92);
    border-bottom: 1px solid var(--border-line);
    position: sticky;
    top: 0;
    z-index: 999;
    backdrop-filter: blur(18px);
}
.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    height: 72px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.logo-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), #a32537);
    color: #fff;
    font-size: 20px;
    box-shadow: 0 4px 18px rgba(var(--primary-rgb), .4);
}
.logo-text {
    font-weight: 800;
    font-size: 18px;
    line-height: 1.3;
    letter-spacing: .02em;
    color: #fff;
}
.logo-text span {
    color: var(--accent);
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}
.main-nav a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 15px;
    font-weight: 500;
    padding: 9px 18px;
    border-radius: 999px;
    color: var(--muted);
    transition: all .3s ease;
}
.main-nav a:hover {
    color: #fff;
    background: rgba(255,255,255,.08);
}
.main-nav a.active {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
}
.nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: rgba(var(--primary-rgb), .2);
    border: 1px solid rgba(var(--primary-rgb), .45);
    color: #ffd2d2;
    font-size: 14px;
    font-weight: 600;
    padding: 9px 20px;
    border-radius: 999px;
    transition: all .3s ease;
}
.nav-btn:hover {
    background: var(--primary);
    color: #fff;
}
.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: rgba(255,255,255,.08);
    color: #fff;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    cursor: pointer;
}

/* hero section */
.page-hero {
    position: relative;
    background: linear-gradient(140deg, #0d1120 0%, #131b31 58%, #1a1d3e 100%);
    overflow: hidden;
    padding: 110px 0 130px;
}
.page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
    opacity: .32;
}
.page-hero::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(650px 380px at 90% 15%, rgba(199,59,59,.28) 0%, transparent 68%),
        radial-gradient(540px 360px at -5% 90%, rgba(40,86,190,.22) 0%, transparent 62%);
}
.page-hero .container {
    position: relative;
    z-index: 2;
}
.hero-inner {
    max-width: 900px;
}
.crumb-line {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: rgba(255,255,255,.65);
    margin-bottom: 30px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: 999px;
    padding: 6px 16px;
    backdrop-filter: blur(8px);
}
.crumb-line a:hover {
    color: #ffd0d0;
}
.crumb-line i {
    font-size: 11px;
    opacity: .5;
}
.page-hero h1 {
    font-size: clamp(38px, 5.2vw, 60px);
    font-weight: 900;
    line-height: 1.2;
    color: #fff;
    letter-spacing: .01em;
    margin-bottom: 18px;
    text-shadow: 0 4px 32px rgba(0, 0, 0, .5);
}
.page-hero h1 .hl {
    background: linear-gradient(120deg, #ffad77, #ff7a7a);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.page-hero .hero-lead {
    font-size: 17px;
    line-height: 2;
    color: rgba(232, 235, 245, .85);
    max-width: 760px;
    margin-bottom: 38px;
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    align-items: center;
}
.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 42px;
    margin-top: 56px;
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,.1);
}
.hero-stat-item .num {
    font-size: 30px;
    font-weight: 800;
    color: #fff;
    font-family: inherit;
}
.hero-stat-item .num i {
    color: var(--accent);
}
.hero-stat-item .label {
    display: block;
    font-size: 14px;
    color: var(--muted);
    margin-top: 4px;
}

/* access flow section */
.section-flow {
    background: #10162a;
}
.section-head {
    text-align: center;
    margin-bottom: 60px;
}
.flow-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 26px;
}
.flow-card {
    background: var(--card-bg);
    border: 1px solid var(--border-line);
    border-radius: var(--radius-md);
    padding: 40px 26px 30px;
    text-align: left;
    position: relative;
    overflow: hidden;
    transition: transform .4s ease, box-shadow .4s ease, border-color .4s ease;
}
.flow-card::before {
    content: attr(data-idx);
    position: absolute;
    right: 12px;
    top: -12px;
    font-size: 64px;
    font-weight: 900;
    color: rgba(255,255,255,.04);
    line-height: 1;
}
.flow-card:hover {
    transform: translateY(-8px);
    border-color: rgba(var(--primary-rgb), .48);
    box-shadow: var(--shadow-md);
}
.flow-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 25px;
    background: rgba(var(--primary-rgb), .14);
    color: #ff9d9d;
    margin-bottom: 22px;
    border: 1px solid rgba(var(--primary-rgb), .22);
}
.flow-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #fff;
}
.flow-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.85;
}

/* scenario section */
.section-scene {
    background: linear-gradient(180deg, #10162a 0%, #0d1223 100%);
    position: relative;
}
.scene-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}
.scene-card {
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-md);
    padding: 34px 28px 30px;
    position: relative;
    backdrop-filter: blur(4px);
    transition: all .35s ease;
}
.scene-card:hover {
    transform: translateY(-6px);
    background: rgba(var(--primary-rgb), .1);
    border-color: rgba(var(--primary-rgb), .42);
}
.scene-tag {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .1);
    font-size: 12px;
    font-weight: 600;
    color: #cfd3ea;
    margin-bottom: 18px;
}
.scene-emoji {
    position: absolute;
    right: 24px;
    top: 24px;
    font-size: 28px;
    opacity: .4;
}
.scene-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 14px;
    color: #fff;
}
.scene-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.9;
}

/* gallery/feature 图文章节 */
.feature-section {
    background: #111b30;
}
.feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}
.feature-copy .feature-list {
    margin-top: 26px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.feature-copy .feature-list li {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}
.feature-copy .feature-list i {
    width: 24px;
    height: 24px;
    background: rgba(var(--primary-rgb), .2);
    border-radius: 50%;
    font-size: 12px;
    color: #ff9d9d;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 5px;
    flex-shrink: 0;
}
.feature-copy .feature-list span {
    font-size: 15px;
    color: var(--muted);
    line-height: 1.8;
}
.feature-copy .feature-list strong {
    color: #fff;
    font-weight: 600;
}
.feature-visual {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(255,255,255,.1);
}
.feature-visual img {
    width: 100%;
    height: auto;
    object-fit: cover;
    min-height: 300px;
}
.badge-card {
    position: absolute;
    bottom: 18px;
    left: 18px;
    background: rgba(15, 19, 32, .85);
    padding: 14px 20px;
    border-radius: 12px;
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,.16);
    display: flex;
    align-items: center;
    gap: 14px;
}
.badge-card i {
    font-size: 20px;
    color: var(--accent);
}
.badge-card .b-label {
    font-size: 12px;
    color: var(--muted);
    line-height: 1.4;
}
.badge-card .b-num {
    font-size: 16px;
    font-weight: 800;
    color: #fff;
}

/* importance/tips cards */
.section-guard {
    background: #09101f;
}
.guard-wrap::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    background: linear-gradient(150deg, rgba(230, 162, 60, .06), rgba(255,255,255,.03) 45%, rgba(199,59,59,.08) 100%);
    pointer-events: none;
}
.guard-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 24px;
}
.guard-card {
    background: rgba(255,255,255,.035);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: 20px;
    padding: 34px;
    transition: transform .3s ease, border-color .3s ease;
}
.guard-card:hover {
    border-color: rgba(230,162,60,.45);
    transform: translateY(-4px);
}
.guard-card .icon-circle {
    width: 46px;
    height: 46px;
    background: rgba(230,162,60,.13);
    border-radius: 50%;
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    margin-bottom: 20px;
}
.guard-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: #fff;
}
.guard-card p,
.guard-card ul {
    font-size: 14px;
    color: var(--muted);
}
.guard-card ul li {
    display: flex;
    gap: 10px;
    padding: 7px 0;
    border-bottom: 1px dashed rgba(255,255,255,.06);
}
.guard-card ul li::before {
    content: "\f058";
    font-family: "Font Awesome 6 Free";
    font-weight: 400;
    color: var(--accent);
    font-size: 14px;
    margin-top: 1px;
}
.guard-card ul li:last-child {
    border-bottom: none;
}

/* api / data badge */
.realbig-section {
    background: #111a2f;
}
.bigdata-grid {
    display: grid;
    grid-template-columns: 4fr 5fr;
    gap: 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,.07);
    background: rgba(255,255,255,.025);
}
.bigdata-vq {
    background: url('/assets/images/coverpic/cover-2.png') center / cover;
    min-height: 330px;
    position: relative;
    display: flex;
    align-items: flex-end;
}
.bigdata-vq::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10,16,33,.75), transparent 70%);
}
.bigdata-vq-inner {
    position: relative;
    z-index: 2;
    padding: 40px 40px 36px;
    color: #fff;
    width: 100%;
}
.bigdata-vq-inner h3 {
    font-size: clamp(22px, 3vw, 30px);
    font-weight: 800;
    margin-bottom: 8px;
}
.bigdata-vq-inner p {
    font-size: 14px;
    opacity: .72;
}
.bigdata-content {
    padding: 42px 36px;
}
.data-item-row {
    display: flex;
    justify-content: space-between;
    gap: 30px;
    border-bottom: 1px solid rgba(255,255,255,.07);
    padding: 22px 0;
}
.data-item-row:last-child {
    border-bottom: none;
}
.data-item-row .d-title {
    color: #cfd3e5;
    font-weight: 600;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.data-item-row .d-val {
    color: #fff;
    font-weight: 700;
    text-align: right;
    flex-shrink: 0;
}
.data-item-row .d-val small {
    display: block;
    font-size: 12px;
    color: var(--mid);
    font-weight: 400;
}

/* faq */
.section-faq {
    background: #0e141f;
}
.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.faq-card {
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.07);
    border-radius: 16px;
    overflow: hidden;
    transition: border-color .3s;
}
.faq-card:hover {
    border-color: rgba(var(--primary-rgb), .4);
}
.faq-q {
    padding: 20px 24px;
    font-weight: 600;
    font-size: 15px;
    color: #fff;
    cursor: pointer;
    display: flex;
    gap: 14px;
    align-items: flex-start;
}
.faq-q i {
    color: var(--accent);
    font-size: 16px;
    margin-top: 3px;
}
.faq-a {
    padding: 0 24px 20px 56px;
    font-size: 14px;
    color: var(--muted);
    line-height: 1.9;
}

/* cta section */
.section-cta {
    position: relative;
    overflow: hidden;
}
.cta-panel {
    background: linear-gradient(145deg, #1b283d, #0e1628);
    border-radius: var(--radius-lg);
    padding: 70px 60px;
    text-align: center;
    border: 1px solid rgba(255,255,255,.1);
    position: relative;
    overflow: hidden;
}
.cta-panel::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-3.webp') center / cover;
    opacity: .2;
}
.cta-panel .inner {
    position: relative;
    z-index: 2;
}
.cta-panel h2 {
    font-size: clamp(26px, 5vw, 46px);
    color: #fff;
    font-weight: 900;
    line-height: 1.35;
    margin-bottom: 22px;
}
.cta-panel p {
    max-width: 640px;
    margin: 0 auto 42px;
    color: rgba(237,240,247,.85);
    font-size: 16px;
    line-height: 1.9;
}

/* footer */
.site-footer {
    background: #080d1a;
    border-top: 1px solid rgba(255,255,255,.06);
    padding: 90px 0 0;
    /* applying global background and typography */
    color: #b9c0d5;
}
.site-footer p {
    color: #80879c;
    font-size: 14px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.4fr;
    gap: 52px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
}
.footer-logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(145deg, var(--primary), #82204a);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
}
.footer-brand h3 {
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.3;
}
.footer-grid h4 {
    color: #d7dbf0;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 18px;
    letter-spacing: 0.05em;
}
.footer-links li {
    margin-bottom: 12px;
}
.footer-links a {
    color: #80879c;
    font-size: 14px;
    transition: color .3s, padding-left .3s;
}
.footer-links a:hover {
    color: #ff9d9d;
    padding-left: 4px;
    text-decoration: none;
}
.footer-info {
    display: flex;
    justify-content: center;
    gap: 30px;
    align-items: center;
    flex-wrap: wrap;
    padding: 24px 0;
    border-bottom: 1px solid rgba(255,255,255,.04);
    text-align: center;
}
.footer-info p,
.tech-meta span {
    color: #6a7388;
    font-size: 13px;
}
.tech-meta {
    display: flex;
    gap: 18px;
}
.footer-disclaimer {
    padding: 46px 0 80px;
    color: #798062;
    text-align: center;
    font-size: 13px;
    line-height: 1.9;
    max-width: 1000px;
    margin: 0 auto;
}
.footer-disclaimer i {
    margin-right: 12px;
    color: #a19265;
}
@media (min-width: 1800px) {
    .footer-grid {
        padding-bottom: 72px;
    }
}

/* responsive */
@media (max-width: 1024px) {
    .big-section {
        padding: 80px 0;
    }
    .flow-grid {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    .contain-inner-grid {
        grid-template-columns: 1fr;
    }
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .feature-visual {
        grid-row: 2;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 42px;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
    .main-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #121a31bd;
        padding: 22px 30px 28px;
        backdrop-filter: blur(18px);
        align-items: flex-start;
        z-index: 100;
        border-bottom: 1px solid rgba(255,255,255,.12);
    }
    .main-nav.open a {
        padding: 12px 10px;
        width: 100%;
    }
    .nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .nav-btn {
        display: none;
    }
    .page-hero {
        padding: 70px 0 80px;
    }
    .hero-lead {
        font-size: 15px;
    }
    .hero-stats {
        gap: 24px;
    }
    .hero-stats .hr-split {
        display: none;
    }
    .btn {
        padding: 12px 22px;
        white-space: normal;
    }
    .hero-actions .btn {
        width: 48%;
    }
    .scene-grid {
        grid-template-columns: 1fr;
    }
    .cta-panel {
        padding: 36px 28px;
    }
    .faq-grid {
        grid-template-columns: 1fr;
    }
    .footer-info {
        gap: 10px;
        flex-direction: column;
    }
    .footer-nav-links {
        gap: 8px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .feature-list span,
    .scene-card h3,
    .hero-stat-item .label {
        line-height: 1.6;
    }
}

@media (max-width: 520px) {
    .nav-wrap {
        height: 66px;
    }
    .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 17px;
    }
    .logo-text {
        font-size: 15px;
    }
    .page-hero h1 {
        font-size: 32px;
    }
    .hero-actions .btn {
        width: 100%;
        margin-bottom: 10px;
    }
    .eyebrow {
        font-size: 12px;
    }
    .big-section {
        padding: 60px 0;
    }
    .cta-panel h2 {
        font-size: 28px;
    }
    .flow-grid {
        grid-template-columns: 1fr;
    }
    .flow-card {
        padding: 28px 20px 24px;
    }
    .feature-visual img {
        min-height: 240px;
    }
    .bigdata-vq {
        min-height: 230px;
    }
    .hero-stats {
        gap: 16px;
        margin-top: 40px;
        padding-top: 28px;
    }
    .hero-stat-item {
        width: 48%;
    }
}

/* roulang page: category3 */
:root {
            --primary: #d52b2b;
            --primary-dark: #a91f22;
            --accent: #ffb400;
            --navy: #0e1a2b;
            --bg-body: #f5f6fa;
            --surface: #ffffff;
            --surface-soft: #f0f3f9;
            --text-one: #172033;
            --text-two: #536079;
            --border-one: #e5e9f2;
            --radius-xl: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 6px 20px rgba(18, 25, 45, .06);
            --shadow-md: 0 16px 38px rgba(18, 25, 45, .10);
            --shadow-lg: 0 26px 60px rgba(18, 25, 45, .14);
            --transition: all .25s ease;
        }

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

        html,
        body {
            margin: 0;
            padding: 0;
        }

        body {
            font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
            background: var(--bg-body);
            color: var(--text-one);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

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

        button,
        input {
            font-family: inherit;
        }

        .container {
            width: min(1180px, 92vw);
            margin: 0 auto;
        }

        .section {
            padding: 84px 0;
        }

        .section-head {
            max-width: 720px;
            margin: 0 auto 44px;
            text-align: center;
        }

        .section-head h2 {
            margin: 0;
            font-size: clamp(28px, 3.2vw, 42px);
            line-height: 1.3;
            color: var(--text-one);
        }

        .section-head p {
            margin: 14px 0 0;
            color: var(--text-two);
            font-size: 16px;
        }

        .section-subtitle {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            background: rgba(213, 43, 43, .08);
            border: 1px solid rgba(213, 43, 43, .16);
            padding: 6px 14px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 13px;
            letter-spacing: .4px;
            margin-bottom: 16px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            background: transparent;
            border: 1px solid transparent;
            padding: 13px 24px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.2;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn:focus-visible {
            outline: 3px solid rgba(255, 180, 0, .5);
            outline-offset: 3px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 10px 24px rgba(213, 43, 43, .25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-light {
            background: #fff;
            color: #172033;
            box-shadow: var(--shadow-sm);
            border-color: rgba(255, 255, 255, .3);
        }

        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-outline {
            border-color: var(--border-one);
            color: var(--text-one);
            background: #fff;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 90;
            background: rgba(255, 255, 255, .88);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(229, 233, 242, .85);
            box-shadow: 0 6px 20px rgba(20, 26, 43, .04);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 24px;
            min-height: 74px;
        }

        .site-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 17px;
            font-weight: 800;
            letter-spacing: .2px;
            white-space: nowrap;
        }

        .logo-chip {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), #ff7a20);
            border-radius: 11px;
            box-shadow: 0 8px 18px rgba(213, 43, 43, .23);
            flex: 0 0 auto;
        }

        .logo-text {
            color: var(--text-one);
            font-size: 18px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 5px;
            margin-left: auto;
        }

        .main-nav a {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 9px 15px;
            border-radius: 999px;
            color: var(--text-two);
            font-weight: 500;
            font-size: 14px;
            transition: var(--transition);
        }

        .main-nav a:hover {
            color: var(--primary);
            background: rgba(213, 43, 43, .06);
        }

        .main-nav a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 8px 18px rgba(213, 43, 43, .22);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border-one);
            background: #fff;
            border-radius: 12px;
            font-size: 20px;
            color: var(--text-one);
            cursor: pointer;
            margin-left: auto;
            transition: var(--transition);
        }

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

        .desktop-cta {
            margin-left: 8px;
            padding: 10px 20px;
            font-size: 14px;
        }

        /* ===== Category Hero ===== */
        .category-hero {
            position: relative;
            padding: 120px 0 112px;
            background:
                linear-gradient(110deg, rgba(8, 15, 30, .96) 12%, rgba(14, 26, 43, .84) 54%, rgba(24, 35, 56, .72)),
                url("/assets/images/backpic/back-1.png") center / cover no-repeat;
            color: #fff;
            overflow: hidden;
        }

        .category-hero::after {
            content: "";
            position: absolute;
            right: -90px;
            top: -90px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(255, 180, 0, .25), transparent 70%);
            pointer-events: none;
        }

        .hero-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 400px;
            align-items: center;
            gap: 44px;
        }

        .hero-copy h1 {
            font-size: clamp(36px, 4.4vw, 56px);
            line-height: 1.18;
            margin: 14px 0 20px;
            letter-spacing: .5px;
        }

        .hero-copy p {
            font-size: 17px;
            color: rgba(255, 255, 255, .82);
            max-width: 620px;
            margin: 0 0 30px;
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .2);
            padding: 6px 15px;
            border-radius: 999px;
            color: var(--accent);
            font-weight: 600;
            font-size: 13px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .hero-data {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 26px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, .16);
        }

        .hero-data-item {
            display: flex;
            align-items: center;
            gap: 9px;
            color: rgba(255, 255, 255, .85);
            font-size: 14px;
        }

        .hero-data-item i {
            color: var(--accent);
            font-size: 18px;
        }

        .hero-data strong {
            display: block;
            font-size: 20px;
            color: #fff;
        }

        .hero-card-wrap {
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .3);
            border-radius: 26px;
            backdrop-filter: blur(14px);
            padding: 24px;
            color: #fff;
            box-shadow: 0 20px 50px rgba(0, 0, 0, .28);
        }

        .hero-card-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 18px;
        }

        .hero-card-head h3 {
            margin: 0;
            font-size: 18px;
        }

        .live-dot {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #fff;
            background: rgba(255, 255, 255, .16);
            border-radius: 999px;
            padding: 4px 10px;
            font-size: 11px;
        }

        .live-dot i {
            color: var(--accent);
            font-size: 10px;
        }

        .card-list-item {
            display: flex;
            align-items: center;
            gap: 12px;
            background: rgba(0, 0, 0, .14);
            border-radius: 16px;
            padding: 12px;
            margin-bottom: 12px;
            border: 1px solid rgba(255, 255, 255, .08);
            transition: var(--transition);
        }

        .card-list-item:hover {
            background: rgba(0, 0, 0, .24);
            transform: translateY(-2px);
        }

        .card-list-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(255, 180, 0, .95), rgba(255, 122, 32, .95));
            flex: 0 0 auto;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            color: var(--navy);
        }

        .card-list-icon.gold {
            background: linear-gradient(135deg, #ffd05c, #f58a24);
        }

        .card-list-icon.red {
            background: linear-gradient(135deg, #ff5e57, #d52b2b);
            color: #fff;
        }

        .card-list-text {
            min-width: 0;
        }

        .card-list-text h4 {
            margin: 0 0 3px;
            font-size: 14px;
            color: #fff;
        }

        .card-list-text p {
            margin: 0;
            font-size: 13px;
            color: rgba(255, 255, 255, .75);
        }

        .card-list-icon small {
            font-size: 10px;
        }

        /* ===== Feature Cards ===== */
        .promo-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .promo-card {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 28px 22px;
            border: 1px solid var(--border-one);
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
            transition: var(--transition);
        }

        .promo-card::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            opacity: 0;
            transition: var(--transition);
        }

        .promo-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(213, 43, 43, .24);
        }

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

        .promo-icon {
            width: 54px;
            height: 54px;
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            background: rgba(213, 43, 43, .1);
            margin-bottom: 20px;
            transition: var(--transition);
        }

        .promo-card:hover .promo-icon {
            background: var(--primary);
            color: #fff;
        }

        .promo-card h3 {
            margin: 0 0 10px;
            font-size: 19px;
        }

        .promo-card p {
            margin: 0;
            color: var(--text-two);
            font-size: 15px;
        }

        .promo-card .hot-tag {
            position: absolute;
            right: 16px;
            top: 18px;
            background: rgba(213, 43, 43, .1);
            color: var(--primary);
            border-radius: 999px;
            font-size: 12px;
            padding: 3px 10px;
            font-weight: 600;
        }

        /* ===== Split Content ===== */
        .split-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 52px;
            align-items: center;
        }

        .split-image {
            position: relative;
            border-radius: 28px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .split-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 380px;
        }

        .split-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(0, 0, 0, 0) 62%, rgba(6, 11, 24, .34) 100%);
            pointer-events: none;
        }

        .image-note {
            position: absolute;
            left: 20px;
            right: 20px;
            bottom: 18px;
            z-index: 2;
            color: #fff;
            background: rgba(0, 0, 0, .32);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, .22);
            padding: 12px 16px;
            border-radius: 16px;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
        }

        .split-content h2 {
            margin: 0 0 18px;
            font-size: clamp(28px, 2.8vw, 40px);
            line-height: 1.35;
        }

        .split-content p {
            margin: 0 0 16px;
            color: var(--text-two);
        }

        .check-list {
            list-style: none;
            margin: 20px 0 0;
            padding: 0;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            color: var(--text-one);
            font-weight: 500;
        }

        .check-list i {
            color: var(--primary);
            flex: 0 0 20px;
            line-height: 22px;
        }

        /* ===== Member Route ===== */
        .route-section {
            background: var(--surface-soft);
        }

        .route-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: route;
        }

        .route-card {
            background: var(--surface);
            border: 1px solid var(--border-one);
            border-radius: 22px;
            padding: 28px 22px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
        }

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

        .route-card .step-number {
            font-size: 42px;
            font-weight: 800;
            color: transparent;
            -webkit-text-stroke: 1.5px var(--primary);
            line-height: 1;
            margin-bottom: 16px;
            display: block;
        }

        .route-card h3 {
            margin: 0 0 12px;
            font-size: 19px;
        }

        .route-card p {
            margin: 0;
            color: var(--text-two);
            font-size: 14.5px;
        }

        .route-state {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 16px;
            color: var(--primary);
            background: rgba(213, 43, 43, .08);
            border-radius: 999px;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
        }

        /* ===== Benefits ===== */
        .benefit-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .benefit-card {
            border-radius: var(--radius-xl);
            background: var(--surface);
            border: 1px solid var(--border-one);
            box-shadow: var(--shadow-sm);
            padding: 30px 26px;
            position: relative;
            transition: var(--transition);
            overflow: hidden;
        }

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

        .benefit-card .b-icon {
            width: 58px;
            height: 58px;
            border-radius: 18px;
            background: var(--navy);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 22px;
        }

        .benefit-card:nth-child(2) .b-icon {
            background: var(--primary);
        }

        .benefit-card:nth-child(3) .b-icon {
            background: var(--accent);
            color: var(--navy);
        }

        .benefit-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            background: rgba(213, 43, 43, .08);
            border-radius: 999px;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 18px;
        }

        .benefit-card h3 {
            margin: 10px 0 10px;
            font-size: 21px;
        }

        .benefit-card p {
            margin: 0;
            color: var(--text-two);
            font-size: 15px;
        }

        .progress-item {
            margin-top: 18px;
        }

        .progress-label {
            display: flex;
            justify-content: space-between;
            font-size: 14px;
            margin-bottom: 6px;
            color: var(--text-one);
        }

        .progress-bar {
            height: 6px;
            background: #e8ecf3;
            border-radius: 999px;
            overflow: hidden;
        }

        .progress-bar span {
            display: block;
            height: 100%;
            border-radius: inherit;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            width: 80%;
        }

        .feature-list {
            margin-top: 20px;
            padding: 0;
            list-style: none;
        }

        .feature-list li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            color: var(--text-two);
            font-size: 14.5px;
            margin: 9px 0;
        }

        .feature-list i {
            color: var(--primary);
            flex: 0 0 18px;
            line-height: 21px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: linear-gradient(180deg, var(--bg-body), #eef1f7 160%);
        }

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

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border-one);
            border-radius: 18px;
            margin-bottom: 14px;
            padding: 0 6px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(213, 43, 43, .24);
            box-shadow: var(--shadow-sm);
        }

        .faq-item[open] {
            border-color: rgba(213, 43, 43, .24);
            box-shadow: var(--shadow-sm);
        }

        .faq-item[open] summary {
            color: var(--primary);
        }

        .faq-item summary {
            cursor: pointer;
            padding: 20px 22px;
            font-size: 16px;
            font-weight: 600;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            color: var(--text-one);
            transition: var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 14px;
            color: var(--text-two);
            flex: 0 0 auto;
            transition: var(--transition);
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-content {
            padding: 0 22px 20px;
            color: var(--text-two);
            font-size: 15px;
            border-top: 1px dashed var(--border-one);
            padding-top: 16px;
        }

        /* ===== CTA ===== */
        .site-cta {
            padding: 70px 0;
            background:
                linear-gradient(110deg, rgba(9, 16, 33, .92), rgba(14, 26, 43, .76)),
                url("/assets/images/backpic/back-2.png") center / cover no-repeat;
            color: #fff;
        }

        .cta-wrap {
            max-width: 760px;
            margin: 0 auto;
            text-align: center;
        }

        .cta-wrap h2 {
            margin: 0 0 14px;
            font-size: clamp(28px, 3vw, 42px);
        }

        .cta-wrap p {
            color: rgba(255, 255, 255, .85);
            margin: 0 0 28px;
            font-size: 17px;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: #0c1424;
            color: rgba(255, 255, 255, .8);
            padding: 64px 0 26px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 38px;
            margin-bottom: 40px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 15px;
        }

        .footer-brand h3 {
            margin: 0;
            color: #fff;
            font-size: 19px;
            font-weight: 700;
        }

        .footer-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), #ff8120);
            color: #fff;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }

        .site-footer p {
            margin: 0;
            font-size: 14px;
            color: rgba(255, 255, 255, .72);
            line-height: 1.8;
        }

        .site-footer h4 {
            color: #fff;
            font-size: 15px;
            margin: 0 0 14px;
        }

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

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

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
            transition: var(--transition);
            line-height: 1.9;
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 5px;
        }

        .footer-info {
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, .1);
            border-bottom: 1px solid rgba(255, 255, 255, .1);
            text-align: center;
            color: rgba(255, 255, 255, .6);
            font-size: 13px;
        }

        .tech-meta {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 18px;
            margin-top: 6px;
        }

        .footer-disclaimer {
            margin-top: 26px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 14px;
            padding: 16px 18px;
            font-size: 13px;
            color: rgba(255, 255, 255, .7);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.7;
        }

        .footer-disclaimer i {
            color: var(--accent);
            margin-top: 3px;
            flex: 0 0 auto;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .promo-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .hero-card-wrap {
                max-width: 640px;
            }

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

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

        @media (max-width: 820px) {
            .section {
                padding: 64px 0;
            }

            .main-nav {
                position: fixed;
                top: 74px;
                left: 12px;
                right: 12px;
                z-index: 80;
                background: #fff;
                border: 1px solid var(--border-one);
                box-shadow: var(--shadow-lg);
                padding: 12px;
                border-radius: 20px;
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
                opacity: 0;
                transform: translateY(-12px);
                visibility: hidden;
                pointer-events: none;
                transition: var(--transition);
            }

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

            .main-nav a {
                padding: 12px 16px;
                border-radius: 14px;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .header-actions {
                display: none;
            }

            .split-block {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 600px) {
            .category-hero {
                padding: 78px 0 66px;
            }

            .hero-data {
                gap: 14px 20px;
            }

            .promo-grid,
            .benefit-grid,
            .route-grid {
                grid-template-columns: 1fr;
            }

            .section-head {
                margin-bottom: 30px;
            }

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

            .tech-meta {
                flex-direction: column;
                gap: 5px;
            }

            .footer-disclaimer {
                flex-direction: column;
                gap: 8px;
            }
        }