/* roulang page: index */
:root {
            --color-primary: #2E90FA;
            --color-primary-dark: #1D4ED8;
            --color-accent: #10B981;
            --color-surface: #F8FAFC;
            --color-card: #FFFFFF;
            --color-text: #0F172A;
            --color-text-secondary: #334155;
            --color-text-muted: #64748B;
            --color-text-disabled: #94A3B8;
            --color-border: #E2E8F0;
            --radius-card: 16px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, .08);
            --shadow-lg: 0 10px 30px rgba(15, 23, 42, .1);
            --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--color-surface);
            color: var(--color-text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
        }

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

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        @media (min-width:768px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        .section {
            padding: 4rem 0;
        }

        @media (min-width:768px) {
            .section {
                padding: 5rem 0;
            }
        }

        .section-head {
            text-align: center;
            margin-bottom: 3rem;
        }

        .section-eyebrow {
            display: inline-block;
            background: rgba(46, 144, 250, .1);
            color: var(--color-primary);
            font-size: .8125rem;
            font-weight: 600;
            padding: .25rem .875rem;
            border-radius: 999px;
            margin-bottom: .75rem;
            letter-spacing: .02em;
        }

        .section-title {
            font-size: 1.875rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--color-text);
            letter-spacing: -.01em;
        }

        @media (min-width:768px) {
            .section-title {
                font-size: 2.25rem;
            }
        }

        .section-desc {
            margin-top: .75rem;
            color: var(--color-text-muted);
            font-size: 1rem;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 999px;
            font-weight: 600;
            font-size: .9375rem;
            padding: .6875rem 1.75rem;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all .25s ease;
            white-space: nowrap;
            gap: .375rem;
            line-height: 1.5;
        }

        .btn-primary {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            box-shadow: 0 4px 12px rgba(46, 144, 250, .25);
        }

        .btn-primary:hover {
            background: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(29, 78, 216, .3);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(29, 78, 216, .25);
        }

        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
        }

        .btn-outline:hover {
            background: rgba(46, 144, 250, .08);
            border-color: var(--color-primary-dark);
            color: var(--color-primary-dark);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(0);
            background: rgba(46, 144, 250, .12);
        }

        .btn-white {
            background: #fff;
            color: var(--color-primary-dark);
            border-color: #fff;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .08);
        }

        .btn-white:hover {
            background: #f1f5f9;
            border-color: #f1f5f9;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .12);
        }

        .btn-ghost-light {
            background: rgba(255, 255, 255, .15);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .3);
            backdrop-filter: blur(4px);
        }

        .btn-ghost-light:hover {
            background: rgba(255, 255, 255, .25);
            transform: translateY(-2px);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: .1875rem .625rem;
            border-radius: 999px;
            font-size: .75rem;
            font-weight: 600;
            line-height: 1.4;
        }

        .badge-blue {
            background: rgba(46, 144, 250, .1);
            color: var(--color-primary);
        }

        .badge-green {
            background: rgba(16, 185, 129, .1);
            color: var(--color-accent);
        }

        .badge-red {
            background: rgba(239, 68, 68, .1);
            color: #EF4444;
        }

        .badge-solid-green {
            background: var(--color-accent);
            color: #fff;
        }

        /* header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, .97);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--color-border);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: .75rem 0;
            gap: 1rem;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: .625rem;
            flex-shrink: 0;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            font-weight: 800;
            font-size: .875rem;
            letter-spacing: -.02em;
            box-shadow: 0 4px 10px rgba(46, 144, 250, .25);
        }

        .brand-text {
            font-size: 1.0625rem;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: .01em;
            white-space: nowrap;
        }

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: .5rem;
        }

        .search-form {
            display: none;
            align-items: center;
            gap: .375rem;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 999px;
            padding: .375rem .75rem;
            transition: border-color .2s;
        }

        .search-form:focus-within {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(46, 144, 250, .1);
        }

        .search-form input {
            border: 0;
            background: transparent;
            font-size: .875rem;
            color: var(--color-text);
            width: 130px;
            padding: 0;
            line-height: 1.5;
        }

        .search-form input::placeholder {
            color: var(--color-text-disabled);
        }

        .search-form input:focus {
            outline: 0;
        }

        .search-form button {
            background: transparent;
            border: 0;
            cursor: pointer;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            font-size: .875rem;
            padding: 0;
        }

        .search-form button:hover {
            color: var(--color-primary);
        }

        .btn-login,
        .btn-register {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 999px;
            font-size: .875rem;
            font-weight: 600;
            padding: .4375rem 1rem;
            transition: all .2s;
            white-space: nowrap;
        }

        .btn-login {
            color: var(--color-text-secondary);
            border: 1px solid var(--color-border);
            background: #fff;
        }

        .btn-login:hover {
            color: var(--color-primary);
            border-color: var(--color-primary);
            background: rgba(46, 144, 250, .04);
        }

        .btn-register {
            background: var(--color-primary);
            color: #fff;
            border: 1px solid var(--color-primary);
            box-shadow: 0 2px 8px rgba(46, 144, 250, .25);
        }

        .btn-register:hover {
            background: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
        }

        .menu-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--color-border);
            border-radius: 8px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: var(--color-text);
            font-size: 1.125rem;
        }

        .channel-nav {
            display: flex;
            align-items: center;
            gap: .25rem;
            overflow-x: auto;
            padding-bottom: .625rem;
            scrollbar-width: none;
            white-space: nowrap;
            -webkit-overflow-scrolling: touch;
        }

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

        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: .25rem;
            padding: .375rem 1rem;
            border-radius: 999px;
            font-size: .875rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all .2s ease;
            flex-shrink: 0;
        }

        .nav-item:hover {
            background: rgba(46, 144, 250, .08);
            color: var(--color-primary);
        }

        .nav-item.active {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(46, 144, 250, .25);
        }

        .nav-item.active:hover {
            background: var(--color-primary-dark);
            color: #fff;
        }

        /* hero */
        .hero {
            position: relative;
            background: linear-gradient(135deg, #EFF6FF 0%, #F0FDF4 70%, #F8FAFC 100%);
            padding: 4rem 0 5rem;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(46, 144, 250, .12), transparent 70%);
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(16, 185, 129, .1), transparent 70%);
        }

        .hero-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
            align-items: center;
        }

        @media (min-width:1024px) {
            .hero-inner {
                grid-template-columns: 1fr 1fr;
                gap: 3rem;
            }
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: .375rem;
            background: rgba(255, 255, 255, .7);
            border: 1px solid rgba(46, 144, 250, .2);
            border-radius: 999px;
            padding: .25rem .875rem;
            font-size: .8125rem;
            color: var(--color-primary-dark);
            font-weight: 600;
            margin-bottom: 1.25rem;
            backdrop-filter: blur(4px);
        }

        .hero-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--color-text);
            letter-spacing: -.02em;
            text-wrap: balance;
        }

        @media (min-width:768px) {
            .hero-title {
                font-size: 2.5rem;
            }
        }

        @media (min-width:1024px) {
            .hero-title {
                font-size: 3rem;
                line-height: 1.25;
            }
        }

        .hero-subtitle {
            margin-top: 1.25rem;
            font-size: 1.0625rem;
            color: var(--color-text-secondary);
            line-height: 1.75;
            max-width: 560px;
        }

        .hero-ctas {
            display: flex;
            flex-wrap: wrap;
            gap: .75rem;
            margin-top: 1.75rem;
        }

        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: .625rem;
            margin-top: 2.25rem;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: .375rem;
            background: rgba(255, 255, 255, .7);
            border: 1px solid var(--color-border);
            border-radius: 999px;
            padding: .375rem .875rem;
            font-size: .8125rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            backdrop-filter: blur(4px);
            transition: all .2s;
        }

        .trust-item:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        .trust-icon {
            color: var(--color-accent);
            font-size: .9375rem;
        }

        .hero-visual {
            position: relative;
        }

        .hero-visual-main {
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            background: var(--color-border);
            aspect-ratio: 16 / 11;
        }

        .hero-visual-main img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .float-card {
            position: absolute;
            background: #fff;
            border-radius: 14px;
            box-shadow: 0 8px 24px rgba(15, 23, 42, .12);
            padding: .625rem .875rem;
            display: flex;
            align-items: center;
            gap: .5rem;
            font-size: .8125rem;
            font-weight: 600;
            color: var(--color-text);
            backdrop-filter: blur(4px);
            transition: transform .2s;
        }

        .float-card:hover {
            transform: scale(1.03);
        }

        .float-card-top {
            top: 16px;
            right: 16px;
        }

        .float-card-bottom {
            bottom: 16px;
            left: 16px;
        }

        .float-card-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(16, 185, 129, .4);
            }
            50% {
                box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
            }
        }

        /* features */
        .features-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
        }

        @media (min-width:768px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width:1024px) {
            .features-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        .feature-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(226, 232, 240, .6);
            transition: all .3s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(46, 144, 250, .2);
        }

        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(46, 144, 250, .1);
            color: var(--color-primary);
            font-size: 1.375rem;
            margin-bottom: 1rem;
        }

        .feature-card:nth-child(2) .feature-icon {
            background: rgba(16, 185, 129, .1);
            color: var(--color-accent);
        }

        .feature-card:nth-child(3) .feature-icon {
            background: rgba(245, 158, 11, .1);
            color: #F59E0B;
        }

        .feature-card:nth-child(4) .feature-icon {
            background: rgba(139, 92, 246, .1);
            color: #8B5CF6;
        }

        .feature-title {
            font-size: 1.0625rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: .5rem;
        }

        .feature-desc {
            font-size: .875rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* news */
        .news-section-bg {
            background: #fff;
        }

        .news-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: .5rem;
            justify-content: center;
            margin-bottom: 1.75rem;
        }

        .news-tab {
            display: inline-flex;
            align-items: center;
            padding: .3125rem .875rem;
            border-radius: 999px;
            font-size: .8125rem;
            font-weight: 500;
            background: var(--color-surface);
            color: var(--color-text-secondary);
            border: 1px solid var(--color-border);
            cursor: pointer;
            transition: all .2s;
        }

        .news-tab:hover {
            color: var(--color-primary);
            border-color: var(--color-primary);
        }

        .news-tab.active {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            font-weight: 600;
        }

        .news-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
            align-items: stretch;
        }

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

        .news-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid rgba(226, 232, 240, .5);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: block;
            transition: all .3s ease;
        }

        .news-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(46, 144, 250, .2);
        }

        .news-card-media {
            position: relative;
            aspect-ratio: 16 / 9;
            background: var(--color-border);
            overflow: hidden;
        }

        .news-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-card-media .badge {
            position: absolute;
            top: 10px;
            left: 10px;
            background: var(--color-accent);
            color: #fff;
            border: 0;
        }

        .news-card-body {
            padding: 1.125rem;
        }

        .news-card-title {
            font-size: 1.0625rem;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: .375rem;
        }

        .news-card-desc {
            font-size: .875rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: .75rem;
            margin-top: .875rem;
            font-size: .8125rem;
            color: var(--color-text-disabled);
        }

        .news-card-horizontal {
            display: flex;
            gap: .875rem;
            background: var(--color-card);
            border-radius: 14px;
            border: 1px solid rgba(226, 232, 240, .4);
            box-shadow: var(--shadow-card);
            padding: .75rem;
            transition: all .25s ease;
            align-items: center;
        }

        .news-card-horizontal:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: rgba(46, 144, 250, .2);
        }

        .news-card-horizontal .thumb {
            width: 96px;
            height: 72px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
            background: var(--color-border);
        }

        @media (min-width:768px) {
            .news-card-horizontal .thumb {
                width: 120px;
                height: 88px;
            }
        }

        .news-card-horizontal .content {
            flex: 1;
            min-width: 0;
        }

        .news-card-horizontal .content h4 {
            font-size: .9375rem;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: .25rem 0 .375rem;
        }

        .news-card-horizontal .content h4:hover {
            color: var(--color-primary);
        }

        .news-card-horizontal .content .meta {
            font-size: .75rem;
            color: var(--color-text-disabled);
            margin-top: .375rem;
        }

        .empty-state {
            border: 2px dashed var(--color-border);
            border-radius: 16px;
            padding: 3rem 1.5rem;
            text-align: center;
            background: var(--color-surface);
        }

        .empty-state .icon {
            font-size: 2.5rem;
            color: var(--color-text-disabled);
            margin-bottom: .75rem;
        }

        .empty-state .title {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: .25rem;
        }

        .empty-state .desc {
            font-size: .875rem;
            color: var(--color-text-muted);
        }

        .view-all-link {
            display: inline-flex;
            align-items: center;
            gap: .25rem;
            font-size: .875rem;
            font-weight: 600;
            color: var(--color-primary);
            transition: all .2s;
        }

        .view-all-link:hover {
            gap: .5rem;
            color: var(--color-primary-dark);
        }

        /* stats band */
        .stats-band {
            background: linear-gradient(135deg, #1D4ED8, #2563EB);
            padding: 4rem 0;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .stats-band .container {
            position: relative;
            z-index: 1;
        }

        .stats-band::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="60" height="60" viewBox="0 0 60 60"><path d="M30 0L60 30L30 60L0 30Z" fill="rgba(255,255,255,0.02)"/></svg>') repeat;
            background-size: 60px 60px;
            opacity: .4;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        @media (min-width:1024px) {
            .stats-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        .stat-num {
            font-size: 2.25rem;
            font-weight: 800;
            letter-spacing: -.02em;
            line-height: 1.2;
        }

        @media (min-width:768px) {
            .stat-num {
                font-size: 2.75rem;
            }
        }

        .stat-label {
            font-size: .9375rem;
            color: rgba(255, 255, 255, .75);
            margin-top: .375rem;
        }

        .stat-plus {
            color: #A7F3D0;
            font-size: 1.5rem;
            vertical-align: super;
            margin-left: .125rem;
        }

        /* testimonials */
        .testimonials {
            background: var(--color-surface);
            padding: 4rem 0;
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
            margin-top: 2.5rem;
        }

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

        @media (min-width:1024px) {
            .testimonials-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        .testimonial-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(226, 232, 240, .4);
            transition: all .3s;
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }

        .testimonial-stars {
            color: #F59E0B;
            font-size: .9375rem;
            letter-spacing: .125rem;
            margin-bottom: .875rem;
        }

        .testimonial-text {
            font-size: .9375rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 1.25rem;
        }

        .testimonial-user {
            display: flex;
            align-items: center;
            gap: .75rem;
        }

        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: .875rem;
        }

        .testimonial-name {
            font-size: .875rem;
            font-weight: 600;
            color: var(--color-text);
        }

        .testimonial-role {
            font-size: .75rem;
            color: var(--color-text-muted);
        }

        /* pricing */
        .pricing {
            background: #fff;
        }

        .pricing-toggle {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: .75rem;
            margin-bottom: 2.5rem;
            font-weight: 600;
            font-size: .875rem;
            color: var(--color-text-muted);
        }

        .pricing-toggle .active {
            color: var(--color-primary);
        }

        .switch {
            position: relative;
            display: inline-block;
            width: 48px;
            height: 26px;
            background: var(--color-border);
            border-radius: 999px;
            cursor: pointer;
            transition: background .3s;
            flex-shrink: 0;
        }

        .switch::after {
            content: '';
            position: absolute;
            top: 3px;
            left: 3px;
            width: 20px;
            height: 20px;
            background: #fff;
            border-radius: 50%;
            box-shadow: 0 1px 4px rgba(0, 0, 0, .2);
            transition: transform .3s;
        }

        .switch.on {
            background: var(--color-primary);
        }

        .switch.on::after {
            transform: translateX(22px);
        }

        .save-tag {
            background: rgba(16, 185, 129, .12);
            color: var(--color-accent);
            border-radius: 999px;
            padding: .1875rem .625rem;
            font-size: .75rem;
            font-weight: 700;
        }

        .pricing-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
            max-width: 1080px;
            margin: 0 auto;
        }

        @media (min-width:768px) {
            .pricing-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 1.25rem;
            }
        }

        .pricing-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: 20px;
            padding: 1.75rem;
            box-shadow: var(--shadow-card);
            position: relative;
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
        }

        .pricing-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .pricing-card.recommended {
            border: 2px solid var(--color-primary);
            box-shadow: 0 8px 30px rgba(46, 144, 250, .12);
        }

        .pricing-badge {
            position: absolute;
            top: -11px;
            right: 20px;
            background: var(--color-accent);
            color: #fff;
            font-size: .75rem;
            font-weight: 700;
            padding: .1875rem .625rem;
            border-radius: 999px;
            letter-spacing: .03em;
        }

        .plan-name {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: .5rem;
        }

        .plan-price {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.1;
            letter-spacing: -.02em;
            display: flex;
            align-items: baseline;
            gap: .375rem;
        }

        .plan-price .currency {
            font-size: 1.125rem;
            font-weight: 600;
        }

        .plan-price .period {
            font-size: .875rem;
            color: var(--color-text-muted);
            font-weight: 400;
        }

        .plan-original {
            font-size: .8125rem;
            color: var(--color-text-disabled);
            text-decoration: line-through;
            margin-top: .125rem;
            min-height: 1.25rem;
        }

        .plan-desc {
            font-size: .875rem;
            color: var(--color-text-muted);
            margin-top: .625rem;
            margin-bottom: 1.25rem;
            line-height: 1.5;
        }

        .plan-features {
            list-style: none;
            margin-bottom: 1.5rem;
            flex-grow: 1;
        }

        .plan-features li {
            display: flex;
            align-items: flex-start;
            gap: .5rem;
            padding: .3125rem 0;
            font-size: .875rem;
            color: var(--color-text-secondary);
        }

        .plan-features .check {
            color: var(--color-accent);
            font-weight: 700;
            flex-shrink: 0;
            font-size: .9375rem;
        }

        .btn-pricing {
            display: flex;
            justify-content: center;
        }

        /* faq */
        .faq {
            background: var(--color-surface);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: .875rem;
            max-width: 860px;
            margin: 0 auto;
        }

        @media (min-width:1024px) {
            .faq-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
        }

        details.faq-item {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 1px 2px rgba(15, 23, 42, .04);
            transition: border-color .2s, box-shadow .2s;
        }

        details.faq-item:hover {
            border-color: rgba(46, 144, 250, .2);
        }

        details.faq-item[open] {
            border-color: rgba(46, 144, 250, .35);
            box-shadow: 0 4px 16px rgba(46, 144, 250, .08);
        }

        details.faq-item summary {
            display: flex;
            align-items: center;
            gap: .75rem;
            padding: 1rem 1.25rem;
            cursor: pointer;
            font-weight: 600;
            font-size: .9375rem;
            color: var(--color-text);
            list-style: none;
            transition: color .2s;
        }

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

        details.faq-item summary:hover {
            color: var(--color-primary);
        }

        details.faq-item summary .q-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 26px;
            height: 26px;
            border-radius: 8px;
            background: rgba(46, 144, 250, .1);
            color: var(--color-primary);
            font-size: .75rem;
            font-weight: 800;
            flex-shrink: 0;
        }

        details.faq-item summary .arrow {
            margin-left: auto;
            font-size: .8125rem;
            color: var(--color-text-disabled);
            transition: transform .3s ease;
            flex-shrink: 0;
        }

        details.faq-item[open] summary .arrow {
            transform: rotate(45deg);
            color: var(--color-primary);
        }

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

        .faq-answer {
            padding: 0 1.25rem 1.25rem;
            font-size: .875rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            border-top: 1px solid rgba(226, 232, 240, .4);
            margin-top: .75rem;
            padding-top: .875rem;
        }

        .faq-cta {
            text-align: center;
            margin-top: 2.25rem;
            font-size: .9375rem;
            color: var(--color-text-muted);
        }

        .faq-cta a {
            color: var(--color-primary);
            font-weight: 600;
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .faq-cta a:hover {
            color: var(--color-primary-dark);
        }

        /* cta band */
        .cta-band {
            background: linear-gradient(120deg, #EFF6FF 0%, #ECFDF5 100%);
            padding: 5rem 0;
            position: relative;
            overflow: hidden;
        }

        .cta-band::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(46, 144, 250, .06), transparent 60%);
        }

        .cta-inner {
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .cta-inner h2 {
            font-size: 1.875rem;
            font-weight: 800;
            color: var(--color-text);
            line-height: 1.3;
            letter-spacing: -.01em;
        }

        @media (min-width:768px) {
            .cta-inner h2 {
                font-size: 2.5rem;
            }
        }

        .cta-inner p {
            margin-top: 1rem;
            font-size: 1.0625rem;
            color: var(--color-text-secondary);
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: .75rem;
            justify-content: center;
            margin-top: 2rem;
        }

        /* footer */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding-top: 3.5rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            padding-bottom: 2.5rem;
        }

        @media (min-width:768px) {
            .footer-grid {
                grid-template-columns: repeat(4, 1fr);
                gap: 1.5rem;
            }
        }

        .footer-brand .brand {
            margin-bottom: .875rem;
        }

        .footer-brand .brand-logo {
            width: 34px;
            height: 34px;
            font-size: .8125rem;
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 1rem;
        }

        .footer-brand p {
            font-size: .875rem;
            line-height: 1.65;
            color: #94A3B8;
            margin-top: .625rem;
        }

        .footer-title {
            font-size: .9375rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: .625rem;
        }

        .footer-links a {
            color: #94A3B8;
            font-size: .875rem;
            transition: color .2s;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: .5rem;
            font-size: .875rem;
            color: #94A3B8;
            padding: .3125rem 0;
        }

        .footer-contact .icon {
            color: #64748B;
            font-size: .9375rem;
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(148, 163, 184, .15);
            padding: 1.5rem 0;
            font-size: .8125rem;
            color: #64748B;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: .75rem;
        }

        /* floating cta */
        .float-cta {
            position: fixed;
            bottom: 1.5rem;
            right: 1.5rem;
            z-index: 40;
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: .75rem;
        }

        .float-cta-main {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            border: 0;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            box-shadow: 0 8px 24px rgba(46, 144, 250, .35);
            transition: all .25s ease;
        }

        .float-cta-main:hover {
            background: var(--color-primary-dark);
            transform: scale(1.08);
        }

        .float-cta-panel {
            display: none;
            flex-direction: column;
            background: #fff;
            border-radius: 14px;
            box-shadow: 0 12px 32px rgba(15, 23, 42, .15);
            padding: .5rem;
            min-width: 140px;
            gap: .25rem;
        }

        .float-cta-panel.show {
            display: flex;
        }

        .float-cta-panel a {
            display: flex;
            align-items: center;
            gap: .5rem;
            padding: .5rem .75rem;
            border-radius: 10px;
            font-size: .875rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all .2s;
        }

        .float-cta-panel a:hover {
            background: rgba(46, 144, 250, .08);
            color: var(--color-primary);
        }

        .back-top {
            position: fixed;
            bottom: 1.5rem;
            left: 1.5rem;
            z-index: 40;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: #fff;
            border: 1px solid var(--color-border);
            color: var(--color-text-secondary);
            box-shadow: 0 4px 12px rgba(15, 23, 42, .08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            cursor: pointer;
            transition: all .2s;
        }

        .back-top:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            transform: translateY(-3px);
        }

        /* scroll anchor */
        section[id] {
            scroll-margin-top: 100px;
        }

        /* mobile responsive */
        @media (max-width:767px) {
            .brand-text {
                font-size: .9375rem;
            }
            .search-form {
                display: none;
            }
            .btn-login {
                display: none;
            }
            .btn-register {
                font-size: .8125rem;
                padding: .375rem .75rem;
            }
            .hero-title {
                font-size: 1.75rem;
                line-height: 1.35;
            }
            .hero {
                padding-top: 3rem;
                padding-bottom: 3.5rem;
            }
            .stats-grid {
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }

        @media (max-width:420px) {
            .brand-text {
                font-size: .8125rem;
            }
            .brand-logo {
                width: 32px;
                height: 32px;
            }
            .btn-register {
                font-size: .75rem;
                padding: .3125rem .625rem;
            }
        }

        @media (min-width:768px) {
            .search-form {
                display: flex;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #2E90FA;
            --color-primary-dark: #1D4ED8;
            --color-accent: #10B981;
            --color-surface: #F8FAFC;
            --color-card: #FFFFFF;
            --color-text: #0F172A;
            --color-text-secondary: #334155;
            --color-text-muted: #64748B;
            --color-border: #E2E8F0;
            --radius-card: 16px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, .08);
            --shadow-hover: 0 12px 30px rgba(15, 23, 42, .12);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--color-surface);
            color: var(--color-text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border);
        }
        .site-header .container {
            padding-top: .75rem;
            padding-bottom: .75rem;
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: .5rem;
            flex-shrink: 0;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            font-size: .875rem;
            font-weight: 800;
            letter-spacing: .02em;
            flex-shrink: 0;
        }
        .brand-text {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--color-text);
            white-space: nowrap;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: .75rem;
        }
        .search-form {
            display: flex;
            align-items: center;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 999px;
            padding: .3rem .5rem .3rem 1rem;
            transition: border-color .2s, box-shadow .2s;
        }
        .search-form:focus-within {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 4px rgba(46, 144, 250, .15);
        }
        .search-form input {
            border: none;
            outline: none;
            background: transparent;
            font-size: .8125rem;
            color: var(--color-text);
            width: 120px;
        }
        .search-form button {
            background: transparent;
            border: none;
            cursor: pointer;
            padding: .35rem .6rem;
            border-radius: 50%;
            color: var(--color-text-muted);
            transition: background .2s, color .2s;
        }
        .search-form button:hover {
            background: #eef4ff;
            color: var(--color-primary);
        }
        .btn-login {
            font-size: .875rem;
            font-weight: 600;
            color: var(--color-text-secondary);
            padding: .45rem 1rem;
            border-radius: 999px;
            transition: background .2s, color .2s;
        }
        .btn-login:hover {
            background: #f1f5f9;
            color: var(--color-primary);
        }
        .btn-register {
            font-size: .875rem;
            font-weight: 600;
            color: #fff;
            background: var(--color-primary);
            padding: .45rem 1.15rem;
            border-radius: 999px;
            transition: background .2s, transform .2s;
            box-shadow: 0 2px 8px rgba(46, 144, 250, .35);
        }
        .btn-register:hover {
            background: var(--color-primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(29, 78, 216, .4);
        }
        .btn-register:active {
            transform: translateY(0);
        }
        .channel-nav {
            display: flex;
            align-items: center;
            gap: .375rem;
            margin-top: .85rem;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
            padding-bottom: .25rem;
        }
        .channel-nav::-webkit-scrollbar {
            display: none;
        }
        .nav-item {
            display: inline-block;
            padding: .4rem 1.1rem;
            font-size: .875rem;
            font-weight: 600;
            color: var(--color-text-secondary);
            border-radius: 999px;
            transition: background .2s, color .2s, transform .15s;
            white-space: nowrap;
        }
        .nav-item:hover {
            background: rgba(46, 144, 250, .08);
            color: var(--color-primary);
        }
        .nav-item:active {
            transform: scale(.96);
        }
        .nav-item.active {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(46, 144, 250, .3);
        }
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 3rem 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            padding-bottom: 2.5rem;
        }
        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            }
        }
        .footer-brand p {
            font-size: .875rem;
            line-height: 1.7;
            margin-top: .85rem;
            color: #94A3B8;
            max-width: 280px;
        }
        .footer-brand .brand-text {
            color: #fff;
        }
        .footer-title {
            font-size: .9375rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: .5rem;
        }
        .footer-links a {
            font-size: .875rem;
            color: #94A3B8;
            transition: color .2s;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-contact {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: .75rem;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: .5rem;
            font-size: .875rem;
            color: #94A3B8;
        }
        .footer-contact .icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(255, 255, 255, .08);
            color: #cbd5e1;
            flex-shrink: 0;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 1.25rem 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: .5rem;
            font-size: .8125rem;
            color: #64748B;
        }
        .footer-bottom span {
            display: inline-block;
        }
        .img-fallback {
            background: #f1f5f9;
            min-height: 120px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #94A3B8;
            font-size: .875rem;
            border-radius: 12px;
        }
        .section-padding {
            padding: 4rem 0;
        }
        @media (min-width: 768px) {
            .section-padding {
                padding: 5rem 0;
            }
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: -.01em;
        }
        @media (min-width: 768px) {
            .section-title {
                font-size: 2.25rem;
            }
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--color-text-muted);
            margin-top: .5rem;
            line-height: 1.7;
        }

/* roulang page: article */
:root {
    --color-primary: #2E90FA;
    --color-primary-dark: #1D4ED8;
    --color-accent: #10B981;
    --color-surface: #F8FAFC;
    --color-card: #FFFFFF;
    --color-text: #0F172A;
    --color-text-secondary: #334155;
    --color-text-muted: #64748B;
    --color-border: #E2E8F0;
    --radius-card: 16px;
    --shadow-card: 0 1px 3px rgba(15,23,42,.08);
    --shadow-hover: 0 20px 40px rgba(15,23,42,.12);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: var(--color-surface);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color .3s;
}
a:hover {
    color: var(--color-primary-dark);
}
button {
    font-family: inherit;
    cursor: pointer;
}
input {
    font-family: inherit;
}
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}
.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 14px;
    padding-bottom: 10px;
    gap: 16px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text);
    font-weight: 800;
    font-size: 18px;
    white-space: nowrap;
}
.brand-logo {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 800;
    letter-spacing: .5px;
    flex-shrink: 0;
}
.brand-text {
    font-size: 17px;
    font-weight: 800;
    letter-spacing: .2px;
}
.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}
.search-form {
    display: flex;
    align-items: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    padding: 4px 6px 4px 14px;
    transition: border-color .3s, box-shadow .3s;
}
.search-form:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(46,144,250,.12);
}
.search-form input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 13px;
    color: var(--color-text);
    width: 150px;
}
.search-form button {
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    transition: background .3s;
    flex-shrink: 0;
}
.search-form button:hover {
    background: var(--color-primary-dark);
}
.btn-login {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 14px;
    padding: 6px 12px;
    border-radius: 50px;
    transition: background .3s, color .3s;
    white-space: nowrap;
}
.btn-login:hover {
    background: var(--color-surface);
    color: var(--color-primary);
}
.btn-register {
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
    font-size: 14px;
    padding: 6px 18px;
    border-radius: 50px;
    display: inline-block;
    transition: background .3s, transform .3s;
    white-space: nowrap;
}
.btn-register:hover {
    background: var(--color-primary-dark);
    color: #fff;
    transform: translateY(-1px);
}
.channel-nav {
    display: flex;
    gap: 4px;
    padding-bottom: 10px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.channel-nav::-webkit-scrollbar {
    display: none;
}
.nav-item {
    display: inline-block;
    padding: 5px 18px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: transparent;
    transition: background .3s, color .3s;
    white-space: nowrap;
}
.nav-item:hover {
    background: rgba(46,144,250,.08);
    color: var(--color-primary);
}
.nav-item.active {
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
}
.site-footer {
    background: #0f172a;
    color: #94a3b8;
    padding-top: 60px;
    padding-bottom: 24px;
    margin-top: 80px;
}
.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 .brand {
    color: #fff;
    margin-bottom: 16px;
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: #94a3b8;
    max-width: 260px;
}
.footer-title {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
}
.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-links a {
    color: #94a3b8;
    font-size: 14px;
    transition: color .3s;
}
.footer-links a:hover {
    color: #fff;
}
.footer-contact {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
    font-size: 14px;
    color: #94a3b8;
}
.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    word-break: break-all;
}
.footer-contact .icon {
    width: 28px;
    height: 28px;
    background: rgba(255,255,255,.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #38bdf8;
    flex-shrink: 0;
}
.footer-bottom {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 24px;
    font-size: 13px;
    color: #64748b;
}
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 13px;
    color: var(--color-text-muted);
    padding: 28px 0 8px;
}
.breadcrumb a {
    color: var(--color-text-muted);
    transition: color .3s;
}
.breadcrumb a:hover {
    color: var(--color-primary);
}
.breadcrumb .sep {
    color: #cbd5e1;
}
.breadcrumb .current {
    color: var(--color-text-secondary);
    font-weight: 500;
    max-width: 400px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.article-main {
    padding: 8px 0 64px;
}
.article-card {
    background: var(--color-card);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
    margin-top: 16px;
}
.article-header {
    text-align: center;
    max-width: 860px;
    margin: 0 auto 32px;
}
.article-badge {
    display: inline-block;
    background: rgba(16,185,129,.12);
    color: #059669;
    font-size: 13px;
    font-weight: 600;
    padding: 4px 16px;
    border-radius: 50px;
    margin-bottom: 16px;
}
.article-header h1 {
    font-size: 32px;
    line-height: 1.35;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 16px;
    letter-spacing: .5px;
}
.article-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 20px;
    font-size: 14px;
    color: var(--color-text-muted);
}
.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.article-meta svg {
    width: 15px;
    height: 15px;
}
.article-cover {
    border-radius: 18px;
    overflow: hidden;
    margin-bottom: 36px;
    aspect-ratio: 16 / 7;
    background: #eef2f7;
}
.article-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.article-content {
    max-width: 820px;
    margin: 0 auto;
    font-size: 17px;
    line-height: 2;
    color: var(--color-text-secondary);
    word-wrap: break-word;
}
.article-content h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    margin: 40px 0 16px;
    padding-left: 16px;
    border-left: 4px solid var(--color-primary);
    line-height: 1.4;
}
.article-content h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    margin: 32px 0 12px;
    line-height: 1.4;
}
.article-content p {
    margin-bottom: 20px;
}
.article-content img {
    border-radius: 12px;
    margin: 24px auto;
}
.article-content blockquote {
    background: #f0fdf4;
    border-left: 4px solid var(--color-accent);
    padding: 18px 24px;
    border-radius: 0 12px 12px 0;
    margin: 24px 0;
    color: #166534;
    font-size: 16px;
}
.article-content ul,
.article-content ol {
    margin: 20px 0;
    padding-left: 24px;
}
.article-content li {
    margin-bottom: 8px;
}
.article-content a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 4px;
    transition: color .3s;
}
.article-content a:hover {
    color: var(--color-primary-dark);
}
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    padding: 24px 0 0;
    border-top: 1px solid var(--color-border);
    margin-top: 40px;
}
.tag-item {
    display: inline-block;
    padding: 4px 16px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 13px;
    color: var(--color-text-secondary);
    transition: background .3s, color .3s, border-color .3s;
}
.tag-item:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}
.article-cta {
    background: linear-gradient(135deg, #eff6ff, #f0fdf4);
    border-radius: 18px;
    padding: 36px 32px;
    text-align: center;
    margin-top: 40px;
    border: 1px solid rgba(16,185,129,.1);
}
.article-cta h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
}
.article-cta p {
    color: var(--color-text-muted);
    font-size: 15px;
    margin-bottom: 24px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
    font-size: 15px;
    padding: 10px 28px;
    border-radius: 50px;
    border: none;
    transition: background .3s, transform .3s, box-shadow .3s;
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(46,144,250,.3);
    color: #fff;
}
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--color-primary);
    font-weight: 600;
    font-size: 15px;
    padding: 10px 28px;
    border-radius: 50px;
    border: 2px solid var(--color-primary);
    transition: background .3s, transform .3s, color .3s;
}
.btn-outline:hover {
    background: rgba(46,144,250,.08);
    transform: translateY(-2px);
    color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}
.article-prev-next {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}
.pn-card {
    background: var(--color-surface);
    border-radius: 12px;
    padding: 16px 20px;
    border: 1px solid var(--color-border);
    transition: border-color .3s, box-shadow .3s;
    display: block;
}
.pn-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 12px rgba(46,144,250,.1);
}
.pn-label {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}
.pn-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-section {
    margin-top: 56px;
}
.section-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.section-title::before {
    content: "";
    width: 4px;
    height: 26px;
    background: var(--color-primary);
    border-radius: 2px;
    display: block;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.related-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    transition: transform .3s, box-shadow .3s;
    display: block;
    color: var(--color-text);
}
.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    color: var(--color-text);
}
.related-card img {
    width: 100%;
    height: 140px;
    object-fit: cover;
    background: #eef2f7;
}
.related-card-body {
    padding: 16px;
}
.related-card-body h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card-body time {
    font-size: 13px;
    color: var(--color-text-muted);
}
.not-found {
    text-align: center;
    background: #fff;
    border-radius: 24px;
    padding: 80px 24px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
    margin-top: 16px;
}
.not-found h1 {
    font-size: 32px;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 16px;
}
.not-found p {
    color: var(--color-text-muted);
    margin-bottom: 32px;
    font-size: 16px;
}
.float-cta {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 40;
}
.float-cta-main {
    width: 56px;
    height: 56px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    box-shadow: 0 8px 24px rgba(46,144,250,.35);
    transition: transform .3s, background .3s;
}
.float-cta-main:hover {
    background: var(--color-primary-dark);
    transform: scale(1.08);
}
.float-cta-card {
    position: absolute;
    bottom: 68px;
    right: 0;
    background: #fff;
    border-radius: 14px;
    box-shadow: var(--shadow-hover);
    padding: 8px;
    display: none;
    flex-direction: column;
    gap: 4px;
    min-width: 150px;
    border: 1px solid var(--color-border);
}
.float-cta:hover .float-cta-card {
    display: flex;
}
.float-cta-card a {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: background .2s, color .2s;
    font-weight: 500;
}
.float-cta-card a:hover {
    background: var(--color-surface);
    color: var(--color-primary);
}
.back-top {
    position: fixed;
    bottom: 92px;
    right: 24px;
    z-index: 39;
    width: 40px;
    height: 40px;
    background: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    transition: background .3s, color .3s, transform .3s;
}
.back-top:hover {
    background: var(--color-surface);
    color: var(--color-primary);
    transform: translateY(-2px);
}
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .article-card {
        padding: 32px;
    }
}
@media (max-width: 768px) {
    .header-top {
        padding-top: 12px;
        padding-bottom: 8px;
    }
    .brand-text {
        font-size: 15px;
    }
    .search-form input {
        width: 110px;
    }
    .article-card {
        padding: 24px;
    }
    .article-header h1 {
        font-size: 26px;
    }
    .article-cover {
        aspect-ratio: 16 / 9;
    }
    .article-meta {
        gap: 6px 14px;
        font-size: 13px;
    }
    .article-content {
        font-size: 16px;
        line-height: 1.9;
    }
    .footer-grid {
        gap: 28px;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .article-prev-next {
        grid-template-columns: 1fr;
    }
    .article-cta {
        padding: 28px 20px;
    }
}
@media (max-width: 520px) {
    .header-actions .btn-login {
        display: none;
    }
    .header-actions .search-form input {
        width: 70px;
    }
    .brand-text {
        font-size: 13px;
    }
    .brand-logo {
        width: 34px;
        height: 34px;
        font-size: 13px;
    }
    .header-actions {
        gap: 6px;
    }
    .btn-register {
        padding: 5px 14px;
        font-size: 13px;
    }
    .article-card {
        padding: 20px 16px;
        border-radius: 18px;
    }
    .article-header h1 {
        font-size: 22px;
    }
    .breadcrumb {
        font-size: 12px;
    }
    .article-content {
        font-size: 15px;
    }
    .article-cta {
        padding: 20px 16px;
    }
    .article-cta h3 {
        font-size: 19px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .float-cta {
        bottom: 16px;
        right: 16px;
    }
    .back-top {
        bottom: 82px;
        right: 16px;
    }
}

/* roulang page: category2 */
:root {
  --color-primary: #2E90FA;
  --color-primary-dark: #1D4ED8;
  --color-accent: #10B981;
  --color-surface: #F8FAFC;
  --color-card: #FFFFFF;
  --color-text: #0F172A;
  --color-text-secondary: #334155;
  --color-text-muted: #64748B;
  --color-border: #E2E8F0;
  --radius-card: 16px;
  --shadow-card: 0 1px 3px rgba(15, 23, 42, .08);
  --shadow-hover: 0 12px 28px rgba(15, 23, 42, .12);
}
html { scroll-behavior: smooth; }
body { font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif; background: var(--color-surface); color: var(--color-text); line-height: 1.6; -webkit-font-smoothing: antialiased; }
.container { max-width: 1280px; margin: 0 auto; padding-left: 1rem; padding-right: 1rem; }
@media (min-width: 768px) { .container { padding-left: 1.5rem; padding-right: 1.5rem; } }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
section { scroll-margin-top: 8rem; }

.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: blur(12px); border-bottom: 1px solid var(--color-border); }
.header-top { display: flex; align-items: center; justify-content: space-between; padding: .75rem 0; gap: 1rem; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: .65rem; }
.brand-logo { width: 38px; height: 38px; border-radius: 50%; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); display: inline-flex; align-items: center; justify-content: center; color: #fff; font-weight: 800; font-size: .9rem; letter-spacing: .5px; box-shadow: 0 4px 12px rgba(46,144,250,.3); }
.brand-text { font-size: 1.15rem; font-weight: 800; color: var(--color-text); letter-spacing: .2px; white-space: nowrap; }
.header-actions { display: flex; align-items: center; gap: .65rem; }
.search-form { display: flex; align-items: center; background: #F1F5F9; border-radius: 999px; padding: .35rem .5rem .35rem 1rem; border: 1px solid transparent; transition: all .3s; }
.search-form:focus-within { border-color: var(--color-primary); background: #fff; box-shadow: 0 0 0 4px rgba(46,144,250,.12); }
.search-form input { border: 0; outline: 0; background: transparent; font-size: .875rem; color: var(--color-text); width: 150px; transition: width .3s; }
.search-form input:focus { width: 185px; }
.search-form button { background: var(--color-primary); color: #fff; border: 0; border-radius: 999px; width: 30px; height: 30px; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; transition: background .3s; }
.search-form button:hover { background: var(--color-primary-dark); }
.btn-login { font-size: .875rem; color: var(--color-text-secondary); padding: .4rem .8rem; border-radius: 999px; transition: all .3s; font-weight: 500; }
.btn-login:hover { color: var(--color-primary); background: rgba(46,144,250,.08); }
.btn-register { font-size: .875rem; background: var(--color-primary); color: #fff; padding: .4rem 1.2rem; border-radius: 999px; font-weight: 600; transition: all .3s; box-shadow: 0 2px 8px rgba(46,144,250,.3); }
.btn-register:hover { background: var(--color-primary-dark); transform: translateY(-1px); box-shadow: 0 6px 16px rgba(29,78,216,.35); }

.channel-nav { display: flex; gap: .35rem; overflow-x: auto; padding: .35rem 0 .6rem; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.channel-nav::-webkit-scrollbar { display: none; }
.nav-item { display: inline-flex; align-items: center; padding: .45rem 1.1rem; border-radius: 999px; font-size: .9rem; font-weight: 500; color: #475569; white-space: nowrap; transition: all .3s; border: 1px solid transparent; }
.nav-item:hover { color: var(--color-primary); background: rgba(46,144,250,.08); }
.nav-item.active { background: var(--color-primary); color: #fff; font-weight: 600; box-shadow: 0 4px 12px rgba(46,144,250,.3); }

.page-hero { position: relative; background: linear-gradient(135deg, #EFF6FF 0%, #F0FDF4 100%); padding: 3.5rem 0; overflow: hidden; }
.page-hero::before { content: ""; position: absolute; top: -60px; right: -60px; width: 260px; height: 260px; border-radius: 50%; background: radial-gradient(circle, rgba(46,144,250,.14), transparent 70%); }
.page-hero::after { content: ""; position: absolute; bottom: -80px; left: 30%; width: 220px; height: 220px; border-radius: 50%; background: radial-gradient(circle, rgba(16,185,129,.12), transparent 70%); }
.page-hero .container { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr; gap: 2rem; align-items: center; }
@media (min-width: 1024px) { .page-hero .container { grid-template-columns: 1.1fr .9fr; } }
.breadcrumb { font-size: .8125rem; color: var(--color-text-muted); margin-bottom: 1rem; display: flex; align-items: center; gap: .4rem; }
.breadcrumb a { color: var(--color-text-muted); transition: color .3s; }
.breadcrumb a:hover { color: var(--color-primary); }
.hero-badge { display: inline-flex; align-items: center; gap: .4rem; background: rgba(255,255,255,.8); border: 1px solid rgba(46,144,250,.15); border-radius: 999px; padding: .35rem 1rem; font-size: .8125rem; color: var(--color-primary-dark); font-weight: 600; margin-bottom: 1rem; backdrop-filter: blur(4px); }
.page-hero h1 { font-size: 2.25rem; font-weight: 800; line-height: 1.2; color: var(--color-text); margin-bottom: 1rem; letter-spacing: -.5px; }
@media (min-width: 768px) { .page-hero h1 { font-size: 3rem; } }
.hero-desc { font-size: 1.05rem; color: var(--color-text-secondary); line-height: 1.75; max-width: 560px; margin-bottom: 1.5rem; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 1.2rem; margin-top: 1.5rem; }
.hero-meta-item { display: flex; align-items: center; gap: .5rem; font-size: .875rem; color: var(--color-text-secondary); background: rgba(255,255,255,.7); border-radius: 999px; padding: .4rem 1rem; border: 1px solid rgba(226,232,240,.6); }
.hero-meta-item i { color: var(--color-accent); }
.hero-image { position: relative; border-radius: var(--radius-card); overflow: hidden; box-shadow: 0 16px 40px rgba(15,23,42,.14); }
.hero-image img { width: 100%; height: 280px; object-fit: cover; }
@media (min-width: 768px) { .hero-image img { height: 340px; } }
.hero-float-card { position: absolute; bottom: 1rem; left: 1rem; background: rgba(255,255,255,.95); backdrop-filter: blur(8px); border-radius: 14px; padding: .65rem 1rem; box-shadow: 0 8px 24px rgba(15,23,42,.15); display: flex; align-items: center; gap: .6rem; font-size: .8125rem; font-weight: 600; color: var(--color-text); }
.hero-float-card .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-accent); box-shadow: 0 0 0 3px rgba(16,185,129,.2); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .5; } }

.section-title { font-size: 1.75rem; font-weight: 800; color: var(--color-text); margin-bottom: .5rem; letter-spacing: -.3px; line-height: 1.3; }
@media (min-width: 768px) { .section-title { font-size: 2.125rem; } }
.section-subtitle { color: var(--color-text-muted); font-size: 1rem; line-height: 1.7; max-width: 640px; }
.title-deco { display: inline-flex; align-items: center; gap: .6rem; margin-bottom: 1rem; color: var(--color-primary); font-weight: 700; font-size: .875rem; letter-spacing: 1px; text-transform: uppercase; }
.title-deco::before { content: ""; width: 28px; height: 3px; border-radius: 99px; background: linear-gradient(90deg, var(--color-primary), var(--color-accent)); }

.steps-section { padding: 4rem 0; }
.steps-grid { display: grid; grid-template-columns: 1fr; gap: 1.25rem; margin-top: 2.5rem; }
@media (min-width: 640px) { .steps-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .steps-grid { grid-template-columns: repeat(4, 1fr); } }
.step-card { background: var(--color-card); border-radius: var(--radius-card); padding: 1.75rem 1.5rem; box-shadow: var(--shadow-card); border: 1px solid var(--color-border); transition: all .3s; position: relative; overflow: hidden; }
.step-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: rgba(46,144,250,.3); }
.step-num { font-size: 2.5rem; font-weight: 800; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1; display: block; margin-bottom: .9rem; }
.step-icon { width: 46px; height: 46px; border-radius: 14px; background: rgba(46,144,250,.1); color: var(--color-primary); display: inline-flex; align-items: center; justify-content: center; font-size: 1.2rem; margin-bottom: 1rem; }
.step-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--color-text); margin-bottom: .5rem; }
.step-card p { font-size: .875rem; color: var(--color-text-muted); line-height: 1.65; }

.detail-section { padding: 4rem 0; background: #fff; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.detail-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; margin-top: 2.5rem; }
@media (min-width: 1024px) { .detail-grid { grid-template-columns: 1fr 1fr; } }
.detail-card { background: var(--color-surface); border-radius: var(--radius-card); overflow: hidden; border: 1px solid var(--color-border); transition: all .3s; }
.detail-card:hover { box-shadow: var(--shadow-hover); border-color: rgba(46,144,250,.2); }
.detail-card-img { height: 200px; overflow: hidden; position: relative; }
.detail-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.detail-card:hover .detail-card-img img { transform: scale(1.03); }
.detail-card-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(15,23,42,.55)); }
.detail-card-tag { position: absolute; top: 1rem; left: 1rem; z-index: 1; background: rgba(255,255,255,.92); color: var(--color-primary-dark); font-size: .75rem; font-weight: 700; padding: .3rem .8rem; border-radius: 999px; backdrop-filter: blur(4px); }
.detail-card-body { padding: 1.5rem; }
.detail-card-body h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: .75rem; color: var(--color-text); }
.detail-list { display: flex; flex-direction: column; gap: .75rem; }
.detail-list li { display: flex; gap: .6rem; align-items: flex-start; font-size: .9rem; color: var(--color-text-secondary); line-height: 1.6; }
.detail-list li i { color: var(--color-accent); margin-top: .25rem; font-size: .8rem; }

.tips-section { padding: 4rem 0; position: relative; }
.tips-layout { display: grid; grid-template-columns: 1fr; gap: 2.5rem; margin-top: 2.5rem; align-items: center; }
@media (min-width: 1024px) { .tips-layout { grid-template-columns: 1fr 1.1fr; } }
.tips-list { display: flex; flex-direction: column; gap: 1rem; }
.tip-item { display: flex; gap: 1rem; background: var(--color-card); border-radius: 14px; padding: 1.1rem 1.25rem; box-shadow: var(--shadow-card); border: 1px solid var(--color-border); transition: all .3s; }
.tip-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.tip-index { width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); color: #fff; font-weight: 700; font-size: .9rem; display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; }
.tip-content h4 { font-size: 1rem; font-weight: 700; color: var(--color-text); margin-bottom: .3rem; }
.tip-content p { font-size: .875rem; color: var(--color-text-muted); line-height: 1.6; }
.tips-image { position: relative; border-radius: var(--radius-card); overflow: hidden; box-shadow: 0 16px 40px rgba(15,23,42,.14); }
.tips-image img { width: 100%; height: 320px; object-fit: cover; }
@media (min-width: 768px) { .tips-image img { height: 400px; } }
.tips-quote { position: absolute; bottom: 1.25rem; left: 1.25rem; right: 1.25rem; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-radius: 14px; padding: 1rem 1.25rem; box-shadow: 0 8px 24px rgba(15,23,42,.15); }
.tips-quote p { font-size: .9rem; color: var(--color-text-secondary); line-height: 1.6; }
.tips-quote span { display: block; margin-top: .5rem; font-size: .8125rem; color: var(--color-primary); font-weight: 600; }

.faq-section { padding: 4rem 0; background: #fff; border-top: 1px solid var(--color-border); }
.faq-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; margin-top: 2.5rem; }
@media (min-width: 768px) { .faq-grid { grid-template-columns: 1fr 1fr; gap: 1.25rem; } }
.faq-item { background: var(--color-surface); border-radius: 14px; border: 1px solid var(--color-border); overflow: hidden; transition: all .3s; }
.faq-item:hover { border-color: rgba(46,144,250,.3); }
.faq-item details { padding: 0; }
.faq-item summary { padding: 1.1rem 1.25rem; cursor: pointer; display: flex; align-items: center; gap: .8rem; font-weight: 600; font-size: .95rem; color: var(--color-text); list-style: none; transition: color .3s; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .faq-icon { width: 28px; height: 28px; border-radius: 50%; background: rgba(46,144,250,.1); color: var(--color-primary); display: inline-flex; align-items: center; justify-content: center; font-size: .75rem; flex-shrink: 0; }
.faq-item summary .fa-chevron-down { margin-left: auto; font-size: .8rem; color: var(--color-text-muted); transition: transform .3s; }
.faq-item details[open] summary { color: var(--color-primary); }
.faq-item details[open] summary .fa-chevron-down { transform: rotate(180deg); }
.faq-answer { padding: 0 1.25rem 1.25rem 3.5rem; font-size: .9rem; color: var(--color-text-secondary); line-height: 1.7; }

.cta-section { padding: 4rem 0; background: linear-gradient(135deg, #EFF6FF 0%, #F0FDF4 100%); position: relative; overflow: hidden; }
.cta-section::before { content: ""; position: absolute; top: 30px; right: 10%; width: 180px; height: 180px; border-radius: 50%; background: radial-gradient(circle, rgba(46,144,250,.14), transparent 70%); }
.cta-box { text-align: center; max-width: 720px; margin: 0 auto; position: relative; z-index: 1; }
.cta-box h2 { font-size: 2rem; font-weight: 800; color: var(--color-text); margin-bottom: .75rem; letter-spacing: -.5px; }
@media (min-width: 768px) { .cta-box h2 { font-size: 2.5rem; } }
.cta-box p { font-size: 1.05rem; color: var(--color-text-secondary); line-height: 1.75; margin-bottom: 2rem; }
.cta-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }
.btn-primary { display: inline-flex; align-items: center; gap: .5rem; background: var(--color-primary); color: #fff; font-weight: 600; font-size: 1rem; padding: .8rem 1.8rem; border-radius: 999px; transition: all .3s; box-shadow: 0 4px 16px rgba(46,144,250,.3); border: 0; cursor: pointer; }
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(29,78,216,.35); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary { display: inline-flex; align-items: center; gap: .5rem; background: #fff; color: var(--color-text); font-weight: 600; font-size: 1rem; padding: .8rem 1.8rem; border-radius: 999px; transition: all .3s; border: 1px solid var(--color-border); box-shadow: var(--shadow-card); cursor: pointer; }
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(15,23,42,.1); }
.btn-secondary:active { transform: translateY(0); }

.site-footer { background: #0F172A; color: #94A3B8; padding: 4rem 0 2rem; font-size: .9rem; }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 2.5rem; margin-bottom: 3rem; }
@media (min-width: 640px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; } }
.footer-brand .brand .brand-text { color: #fff; }
.footer-brand p { margin-top: 1rem; line-height: 1.7; max-width: 320px; }
.footer-title { color: #fff; font-size: .95rem; font-weight: 700; margin-bottom: 1.2rem; }
.footer-links { display: flex; flex-direction: column; gap: .65rem; }
.footer-links a { color: #94A3B8; transition: color .3s, padding-left .3s; }
.footer-links a:hover { color: #fff; padding-left: .25rem; }
.footer-contact { display: flex; flex-direction: column; gap: .75rem; }
.footer-contact li { display: flex; align-items: center; gap: .6rem; font-size: .875rem; }
.footer-contact .icon { width: 28px; height: 28px; border-radius: 8px; background: rgba(255,255,255,.06); display: inline-flex; align-items: center; justify-content: center; color: var(--color-primary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding-top: 1.5rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: .75rem; font-size: .8125rem; color: #64748B; }

.float-cta { position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 40; display: flex; flex-direction: column; align-items: flex-end; gap: .75rem; }
.float-main { width: 56px; height: 56px; border-radius: 50%; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.4rem; box-shadow: 0 8px 24px rgba(46,144,250,.4); cursor: pointer; transition: all .3s; border: 0; }
.float-main:hover { transform: scale(1.08); box-shadow: 0 12px 32px rgba(46,144,250,.5); }
.float-card { position: absolute; bottom: 70px; right: 0; background: #fff; border-radius: 16px; box-shadow: 0 16px 40px rgba(15,23,42,.18); padding: 1rem; min-width: 180px; opacity: 0; visibility: hidden; transform: translateY(10px); transition: all .35s; border: 1px solid var(--color-border); }
.float-cta:hover .float-card { opacity: 1; visibility: visible; transform: translateY(0); }
.float-card a { display: flex; align-items: center; gap: .6rem; padding: .6rem .8rem; border-radius: 10px; font-size: .875rem; color: var(--color-text-secondary); transition: all .25s; }
.float-card a:hover { background: rgba(46,144,250,.08); color: var(--color-primary); }
.float-card a i { width: 30px; height: 30px; border-radius: 8px; background: rgba(46,144,250,.1); color: var(--color-primary); display: inline-flex; align-items: center; justify-content: center; font-size: .8rem; }

@media (max-width: 640px) {
  .header-top { flex-wrap: wrap; }
  .search-form input { width: 110px; }
  .search-form input:focus { width: 130px; }
  .btn-login { padding: .3rem .6rem; }
  .btn-register { padding: .3rem .9rem; }
  .brand-text { font-size: 1rem; }
  .page-hero h1 { font-size: 1.75rem; }
  .hero-meta { gap: .6rem; }
  .hero-meta-item { padding: .3rem .7rem; font-size: .8rem; }
  .section-title { font-size: 1.5rem; }
  .steps-section, .detail-section, .tips-section, .faq-section, .cta-section { padding: 3rem 0; }
}

/* roulang page: category3 */
:root {
            --color-primary: #2E90FA;
            --color-primary-dark: #1D4ED8;
            --color-accent: #10B981;
            --color-surface: #F8FAFC;
            --color-card: #FFFFFF;
            --color-text: #0F172A;
            --color-text-secondary: #334155;
            --color-text-muted: #64748B;
            --radius-card: 16px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, .08);
            --shadow-hover: 0 12px 24px rgba(15, 23, 42, .10);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--color-surface);
            color: var(--color-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease, background .2s ease, box-shadow .2s ease, transform .2s ease;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (min-width: 1024px) {
            .container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }
        .section {
            padding: 64px 0;
        }
        @media (min-width: 768px) {
            .section {
                padding: 80px 0;
            }
        }
        .section-alt {
            background: #FFFFFF;
        }
        .section-head {
            max-width: 640px;
            margin-bottom: 40px;
        }
        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-title {
            font-size: 1.875rem;
            line-height: 1.3;
            font-weight: 800;
            color: var(--color-text);
            margin: 0 0 12px;
        }
        .section-title .bar {
            display: inline-block;
            width: 6px;
            height: 24px;
            border-radius: 999px;
            background: var(--color-primary);
            margin-right: 12px;
            vertical-align: -3px;
        }
        .section-subtitle {
            color: var(--color-text-muted);
            font-size: 1rem;
            line-height: 1.8;
            margin: 0;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid #E2E8F0;
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 14px 0 10px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, #2E90FA, #10B981);
            color: #fff;
            font-weight: 800;
            font-size: 14px;
            letter-spacing: .5px;
        }
        .brand-text {
            font-weight: 700;
            font-size: 18px;
            color: var(--color-text);
            white-space: nowrap;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form {
            display: flex;
            align-items: center;
            background: #F1F5F9;
            border-radius: 999px;
            padding: 6px 6px 6px 16px;
            gap: 4px;
            transition: box-shadow .2s;
        }
        .search-form:focus-within {
            box-shadow: 0 0 0 4px rgba(46, 144, 250, .15);
        }
        .search-form input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            color: var(--color-text);
            width: 160px;
        }
        .search-form button {
            border: none;
            background: var(--color-primary);
            color: #fff;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background .2s;
        }
        .search-form button:hover {
            background: var(--color-primary-dark);
        }
        .btn-login {
            font-size: 14px;
            color: var(--color-text-secondary);
            padding: 8px 16px;
            border-radius: 999px;
            font-weight: 500;
        }
        .btn-login:hover {
            background: #F1F5F9;
        }
        .btn-register {
            font-size: 14px;
            background: var(--color-primary);
            color: #fff;
            padding: 8px 20px;
            border-radius: 999px;
            font-weight: 600;
            box-shadow: var(--shadow-card);
        }
        .btn-register:hover {
            background: var(--color-primary-dark);
            transform: translateY(-1px);
        }
        .channel-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 4px 0 12px;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }
        .channel-nav::-webkit-scrollbar {
            display: none;
        }
        .nav-item {
            flex-shrink: 0;
            display: inline-block;
            padding: 7px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: #475569;
            white-space: nowrap;
            transition: background .2s, color .2s;
        }
        .nav-item:hover {
            background: #EFF6FF;
            color: var(--color-primary);
        }
        .nav-item.active {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
        }

        @media (max-width: 767px) {
            .search-form {
                display: none;
            }
            .btn-login {
                display: none;
            }
            .btn-register {
                font-size: 13px;
                padding: 6px 14px;
            }
            .brand-text {
                font-size: 15px;
            }
        }
        @media (max-width: 400px) {
            .brand-text {
                font-size: 13px;
            }
            .header-top {
                gap: 8px;
            }
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1.4;
            border: 2px solid transparent;
            cursor: pointer;
            transition: all .25s ease;
        }
        .btn-primary {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(46, 144, 250, .25);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(46, 144, 250, .30);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background: #fff;
            color: var(--color-text-secondary);
            border-color: #E2E8F0;
        }
        .btn-secondary:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-text-secondary);
            border-color: #CBD5E1;
        }
        .btn-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        /* Hero */
        .hero {
            position: relative;
            background: linear-gradient(120deg, #EFF6FF 0%, #F0FDF4 100%);
            padding: 72px 0 80px;
            overflow: hidden;
        }
        .hero::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -60px;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: rgba(46, 144, 250, .08);
        }
        .hero::after {
            content: "";
            position: absolute;
            bottom: -60px;
            left: 30%;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(16, 185, 129, .08);
        }
        .hero-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
            align-items: center;
        }
        @media (min-width: 1024px) {
            .hero {
                padding: 88px 0 96px;
            }
            .hero-inner {
                grid-template-columns: 1.05fr .95fr;
            }
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, .8);
            border: 1px solid #E2E8F0;
            border-radius: 999px;
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 18px;
        }
        .hero-tag .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-accent);
            animation: pulse 1.6s infinite;
        }
        @keyframes pulse {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: .5;
            }
        }
        .hero h1 {
            font-size: 2.25rem;
            line-height: 1.25;
            font-weight: 800;
            color: var(--color-text);
            margin: 0 0 16px;
            letter-spacing: .5px;
        }
        @media (min-width: 768px) {
            .hero h1 {
                font-size: 2.875rem;
            }
        }
        .hero-desc {
            font-size: 1.0625rem;
            line-height: 1.8;
            color: var(--color-text-secondary);
            max-width: 540px;
            margin: 0 0 28px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }
        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .hero-trust span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, .75);
            border-radius: 999px;
            padding: 6px 14px;
            font-size: 13px;
            color: var(--color-text-secondary);
            font-weight: 500;
        }
        .hero-trust span::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-accent);
        }
        .hero-image {
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(15, 23, 42, .12);
        }
        .hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 300px;
            aspect-ratio: 4 / 3;
        }
        .hero-float-card {
            position: absolute;
            left: 16px;
            bottom: 16px;
            background: rgba(255, 255, 255, .95);
            backdrop-filter: blur(8px);
            border-radius: 16px;
            padding: 12px 18px;
            box-shadow: 0 8px 24px rgba(15, 23, 42, .12);
            font-size: 14px;
            color: var(--color-text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-float-card strong {
            color: var(--color-accent);
            font-size: 22px;
            font-weight: 800;
        }

        /* Filter tabs */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 32px;
        }
        .filter-tab {
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            background: #F1F5F9;
            color: #475569;
            border: none;
            cursor: pointer;
            transition: background .2s, color .2s, box-shadow .2s;
        }
        .filter-tab:hover {
            background: #E0F2FE;
            color: var(--color-primary);
        }
        .filter-tab.active {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(46, 144, 250, .25);
        }

        /* Activity cards */
        .activity-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
        }
        @media (min-width: 768px) {
            .activity-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .activity-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        .activity-card {
            position: relative;
            background: var(--color-card);
            border: 1px solid #E2E8F0;
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: box-shadow .3s, transform .3s;
            display: flex;
            flex-direction: column;
        }
        .activity-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: #BFDBFE;
        }
        .activity-card .card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            margin-bottom: 14px;
        }
        .activity-type {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: #ECFDF5;
            color: #047857;
        }
        .activity-type.type-blue {
            background: #EFF6FF;
            color: #1D4ED8;
        }
        .activity-type.type-amber {
            background: #FFFBEB;
            color: #B45309;
        }
        .activity-time {
            font-size: 13px;
            color: var(--color-text-muted);
            font-weight: 500;
            white-space: nowrap;
        }
        .live-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: #FEF2F2;
            color: #DC2626;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 999px;
        }
        .live-tag .red-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #DC2626;
            animation: pulse 1.2s infinite;
        }
        .coming-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: #F1F5F9;
            color: #475569;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 999px;
        }
        .activity-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 8px;
            line-height: 1.45;
        }
        .activity-card .desc {
            font-size: 14px;
            line-height: 1.65;
            color: var(--color-text-secondary);
            margin: 0 0 20px;
            flex: 1;
        }
        .progress-block {
            margin-top: auto;
        }
        .progress-label {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 6px;
            font-weight: 500;
        }
        .progress-label span:last-child {
            color: var(--color-text-secondary);
            font-weight: 600;
        }
        .progress-bar {
            height: 8px;
            background: #E2E8F0;
            border-radius: 999px;
            overflow: hidden;
            margin-bottom: 18px;
        }
        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #10B981, #34D399);
            border-radius: 999px;
        }
        .activity-btn {
            display: block;
            width: 100%;
            text-align: center;
            padding: 10px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            border: 1.5px solid #BFDBFE;
            color: var(--color-primary);
            background: #F0F9FF;
            transition: background .2s, color .2s, transform .2s;
        }
        .activity-btn:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-1px);
        }

        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
        }
        @media (min-width: 768px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(4, 1fr);
                gap: 28px;
            }
        }
        .step-card {
            background: #F8FAFC;
            border: 1px solid #E2E8F0;
            border-radius: var(--radius-card);
            padding: 28px 24px;
            position: relative;
            transition: box-shadow .3s, transform .3s;
        }
        .step-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: linear-gradient(135deg, #2E90FA, #10B981);
            color: #fff;
            font-size: 17px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 8px;
        }
        .step-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-text-muted);
            margin: 0;
        }

        /* Stats band */
        .stats-band {
            background: linear-gradient(120deg, #1D4ED8 0%, #1E40AF 100%);
            position: relative;
            overflow: hidden;
            padding: 64px 0;
        }
        .stats-band::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: .12;
        }
        .stats-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px 24px;
        }
        @media (min-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }
        .stat-item {
            text-align: center;
            color: #fff;
        }
        .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 4px;
            letter-spacing: .5px;
        }
        @media (min-width: 768px) {
            .stat-item .num {
                font-size: 2.5rem;
            }
        }
        .stat-item .label {
            font-size: 14px;
            color: rgba(255, 255, 255, .8);
            font-weight: 500;
        }

        /* FAQ */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }
        @media (min-width: 1024px) {
            .faq-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }
        .faq-item {
            background: var(--color-card);
            border: 1px solid #E2E8F0;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow .2s;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .faq-item summary {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 22px;
            cursor: pointer;
            list-style: none;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            transition: color .2s;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::before {
            content: "?";
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #EFF6FF;
            color: var(--color-primary);
            font-weight: 700;
            font-size: 14px;
            flex-shrink: 0;
        }
        .faq-item summary::after {
            content: "";
            width: 8px;
            height: 8px;
            border-right: 2px solid #94A3B8;
            border-bottom: 2px solid #94A3B8;
            transform: rotate(45deg);
            margin-left: auto;
            transition: transform .3s;
            flex-shrink: 0;
        }
        .faq-item[open] summary {
            color: var(--color-primary);
        }
        .faq-item[open] summary::after {
            transform: rotate(-135deg);
        }
        .faq-item .answer {
            padding: 0 22px 20px 64px;
            font-size: 14px;
            line-height: 1.75;
            color: var(--color-text-secondary);
        }

        /* CTA */
        .cta-band {
            background: linear-gradient(120deg, #EFF6FF 0%, #ECFDF5 100%);
            padding: 72px 0;
        }
        .cta-inner {
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--color-text);
            margin: 0 0 12px;
            line-height: 1.4;
        }
        .cta-inner p {
            font-size: 1rem;
            line-height: 1.8;
            color: var(--color-text-secondary);
            margin: 0 0 28px;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
        }

        /* Footer */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
            padding-bottom: 40px;
        }
        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
            }
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin: 16px 0 0;
            max-width: 300px;
        }
        .footer-brand .brand-text {
            color: #fff;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: #94A3B8;
            transition: color .2s;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
            font-size: 14px;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact .icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 10px;
            background: rgba(255, 255, 255, .06);
            color: #CBD5E1;
            flex-shrink: 0;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            justify-content: space-between;
            font-size: 13px;
            color: #64748B;
        }

        /* Float CTA */
        .float-cta {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 40;
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 10px;
        }
        .float-main {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 24px rgba(46, 144, 250, .35);
            font-size: 14px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: transform .25s, background .25s;
        }
        .float-main:hover {
            transform: scale(1.06);
            background: var(--color-primary-dark);
        }
        .float-pop {
            display: none;
            flex-direction: column;
            gap: 8px;
            background: #fff;
            border-radius: 16px;
            box-shadow: 0 12px 32px rgba(15, 23, 42, .15);
            padding: 12px;
            min-width: 140px;
        }
        .float-pop a {
            padding: 8px 14px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-secondary);
            text-align: center;
        }
        .float-pop a:hover {
            background: #EFF6FF;
            color: var(--color-primary);
        }
        .float-cta:hover .float-pop {
            display: flex;
        }

        @media (max-width: 767px) {
            .footer-bottom {
                flex-direction: column;
                gap: 4px;
            }
            .hero h1 {
                font-size: 1.75rem;
            }
            .hero {
                padding: 48px 0 56px;
            }
            .cta-band {
                padding: 56px 0;
            }
            .stats-band {
                padding: 48px 0;
            }
        }