/* roulang page: index */
:root {
            --primary: #4F46E5;
            --primary-light: #818CF8;
            --primary-dark: #3730A3;
            --accent: #F59E0B;
            --accent-light: #FBBF24;
            --bg-white: #FFFFFF;
            --bg-light: #F8FAFC;
            --bg-dark: #0F172A;
            --text-main: #1E293B;
            --text-sub: #64748B;
            --text-invert: #F1F5F9;
            --border-color: #E2E8F0;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-pill: 999px;
            --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 8px 30px rgba(15, 23, 42, 0.1);
            --shadow-lg: 0 20px 60px rgba(15, 23, 42, 0.16);
            --section-space: 90px;
            --container-max: 1200px;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-main);
            background-color: var(--bg-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            display: block;
            border: 0;
        }

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

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

        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 10px 16px;
            outline: none;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }

        input:focus,
        textarea:focus {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12);
        }

        ul,
        ol {
            list-style: none;
        }

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

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

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

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            letter-spacing: 0.02em;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 36px;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 17px;
            color: var(--text-sub);
            max-width: 640px;
            line-height: 1.7;
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 48px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1;
            padding: 14px 28px;
            border-radius: var(--radius-pill);
            transition: all var(--transition-base);
            cursor: pointer;
            border: 2px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-main);
            border-color: var(--border-color);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(79, 70, 229, 0.04);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.35);
            color: #fff;
        }

        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

        .btn-light {
            background: #fff;
            color: var(--primary-dark);
        }

        .btn-light:hover {
            background: var(--bg-light);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
        }

        .btn-lg {
            padding: 17px 40px;
            font-size: 16px;
        }

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

        .muted {
            color: var(--text-sub);
        }

        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.5);
            outline-offset: 2px;
        }

        /* ======= Header & Nav ======= */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 6px 24px rgba(15, 23, 42, 0.08);
            border-color: transparent;
        }

        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 74px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.02em;
            flex-shrink: 0;
            line-height: 1;
        }

        .brand-logo .logo-mark {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
        }

        .brand-logo .logo-text {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .main-nav a {
            padding: 10px 18px;
            border-radius: var(--radius-pill);
            font-weight: 500;
            font-size: 15px;
            color: var(--text-sub);
            transition: all var(--transition-base);
            position: relative;
        }

        .main-nav a:hover {
            color: var(--primary);
            background: rgba(79, 70, 229, 0.06);
        }

        .main-nav a.active {
            color: var(--primary);
            background: rgba(79, 70, 229, 0.1);
            font-weight: 600;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .btn-header {
            padding: 10px 22px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            background: var(--bg-white);
            align-items: center;
            justify-content: center;
            cursor: pointer;
            flex-shrink: 0;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            position: relative;
            transition: background 0.2s;
        }

        .nav-toggle span::before,
        .nav-toggle span::after {
            content: "";
            position: absolute;
            width: 20px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            left: 0;
            transition: transform 0.3s, top 0.3s;
        }

        .nav-toggle span::before {
            top: -6px;
        }

        .nav-toggle span::after {
            top: 6px;
        }

        .nav-toggle.open span {
            background: transparent;
        }

        .nav-toggle.open span::before {
            top: 0;
            transform: rotate(45deg);
        }

        .nav-toggle.open span::after {
            top: 0;
            transform: rotate(-45deg);
        }

        /* ======= Hero ======= */
        .hero {
            position: relative;
            min-height: 680px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: linear-gradient(135deg, #EEF2FF 0%, #F8FAFC 40%, #E0E7FF 100%);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
            opacity: 0.35;
        }

        .hero::before {
            content: "";
            position: absolute;
            top: -20%;
            right: -10%;
            width: 520px;
            height: 520px;
            border-radius: 50%;
            background: rgba(79, 70, 229, 0.08);
            filter: blur(80px);
            z-index: 1;
        }

        .hero::after {
            content: "";
            position: absolute;
            bottom: -30%;
            left: -5%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(245, 158, 11, 0.08);
            filter: blur(90px);
            z-index: 1;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 60px;
            align-items: center;
            padding-top: 80px;
            padding-bottom: 80px;
            width: 100%;
        }

        .hero-content {
            padding-right: 20px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(79, 70, 229, 0.1);
            border: 1px solid rgba(79, 70, 229, 0.15);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 7px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 22px;
        }

        .hero-badge .badge-dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
        }

        .hero h1 {
            font-size: 50px;
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.2;
            color: var(--text-main);
            margin-bottom: 20px;
        }

        .hero h1 .gradient-text {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-sub);
            line-height: 1.75;
            margin-bottom: 32px;
            max-width: 520px;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 42px;
        }

        .hero-stats {
            display: flex;
            gap: 36px;
            padding-top: 28px;
            border-top: 1px solid rgba(226, 232, 240, 0.8);
        }

        .hero-stat-number {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.2;
        }

        .hero-stat-label {
            font-size: 14px;
            color: var(--text-sub);
            margin-top: 4px;
        }

        .hero-visual {
            position: relative;
        }

        .hero-card-stack {
            position: relative;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(20px);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(255, 255, 255, 0.6);
            transform: perspective(1200px) rotateY(-4deg) rotateX(2deg);
            transition: transform 0.4s ease;
        }

        .hero-card-stack:hover {
            transform: perspective(1200px) rotateY(-2deg) rotateX(1deg) translateY(-4px);
        }

        .hero-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }

        .hero-card-title {
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .hero-card-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
        }

        .hero-card-status {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--text-sub);
            background: rgba(245, 158, 11, 0.12);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-weight: 600;
        }

        .hero-chart {
            display: flex;
            align-items: flex-end;
            gap: 10px;
            height: 180px;
            margin-bottom: 24px;
            background: linear-gradient(180deg, rgba(79, 70, 229, 0.03) 0%, transparent 100%);
            border-radius: var(--radius-md);
            padding: 16px 12px 0;
        }

        .chart-bar {
            flex: 1;
            border-radius: 8px 8px 4px 4px;
            background: linear-gradient(180deg, var(--primary-light), var(--primary));
            min-height: 20px;
            position: relative;
            transition: height 0.6s cubic-bezier(0.4, 0, 0.2, 1);
            opacity: 0.85;
        }

        .chart-bar:nth-child(1) {
            height: 35%;
        }

        .chart-bar:nth-child(2) {
            height: 55%;
        }

        .chart-bar:nth-child(3) {
            height: 45%;
        }

        .chart-bar:nth-child(4) {
            height: 70%;
        }

        .chart-bar:nth-child(5) {
            height: 60%;
        }

        .chart-bar:nth-child(6) {
            height: 80%;
        }

        .chart-bar:nth-child(7) {
            height: 72%;
            background: linear-gradient(180deg, var(--accent-light), var(--accent));
        }

        .hero-card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 16px;
            border-top: 1px solid var(--border-color);
        }

        .hero-metric {
            text-align: center;
        }

        .hero-metric-value {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-main);
        }

        .hero-metric-name {
            font-size: 12px;
            color: var(--text-sub);
        }

        .floating-pill {
            position: absolute;
            background: #fff;
            box-shadow: var(--shadow-md);
            border-radius: var(--radius-pill);
            padding: 10px 18px;
            font-size: 13px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            z-index: 3;
            border: 1px solid rgba(226, 232, 240, 0.6);
        }

        .floating-pill-1 {
            top: -18px;
            right: 12px;
            color: var(--primary);
        }

        .floating-pill-2 {
            bottom: 42px;
            left: -28px;
            color: var(--accent);
            animation: float-y 3s ease-in-out infinite;
        }

        @keyframes float-y {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-8px);
            }
        }

        /* ======= Features ======= */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

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

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

        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
            border-color: rgba(79, 70, 229, 0.2);
        }

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

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
        }

        .feature-card:nth-child(2) .feature-icon {
            background: rgba(245, 158, 11, 0.12);
            color: #D97706;
        }

        .feature-card:nth-child(3) .feature-icon {
            background: rgba(16, 185, 129, 0.12);
            color: #059669;
        }

        .feature-card:nth-child(4) .feature-icon {
            background: rgba(239, 68, 68, 0.1);
            color: #DC2626;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.65;
        }

        /* ======= Channels ======= */
        .channels-section {
            background: var(--bg-light);
        }

        .channels-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .channel-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }

        .channel-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-md);
            border-color: rgba(79, 70, 229, 0.2);
        }

        .channel-cover {
            position: relative;
            height: 220px;
            overflow: hidden;
            display: block;
        }

        .channel-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        .channel-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(15, 23, 42, 0.4) 100%);
        }

        .channel-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            box-shadow: var(--shadow-sm);
        }

        .channel-body {
            padding: 26px 26px 30px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .channel-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .channel-body p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 18px;
        }

        .channel-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 14px;
            color: var(--primary);
            transition: gap var(--transition-base);
        }

        .channel-link:hover {
            gap: 12px;
            color: var(--primary-dark);
        }

        /* ======= Latest News (CMS) ======= */
        .news-section {
            background: var(--bg-white);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 48px;
            align-items: start;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 24px 0;
            border-bottom: 1px solid var(--border-color);
            transition: padding-left var(--transition-base);
        }

        .news-item:first-child {
            padding-top: 0;
        }

        .news-item:last-child {
            border-bottom: none;
        }

        .news-item:hover {
            padding-left: 8px;
        }

        .news-index {
            font-size: 20px;
            font-weight: 800;
            color: rgba(79, 70, 229, 0.25);
            flex-shrink: 0;
            min-width: 36px;
            font-style: italic;
        }

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

        .news-content h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-base);
        }

        .news-item:hover .news-content h3 {
            color: var(--primary);
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-sub);
        }

        .news-category {
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            font-size: 12px;
        }

        .news-arrow {
            color: var(--border-color);
            font-size: 18px;
            flex-shrink: 0;
            transition: color var(--transition-base), transform var(--transition-base);
        }

        .news-item:hover .news-arrow {
            color: var(--primary);
            transform: translateX(4px);
        }

        .news-sidebar {
            background: var(--bg-light);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--border-color);
        }

        .news-sidebar h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .news-sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .news-sidebar-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px;
            border-radius: var(--radius-md);
            background: var(--bg-white);
            transition: all var(--transition-base);
            border: 1px solid transparent;
        }

        .news-sidebar-item:hover {
            border-color: rgba(79, 70, 229, 0.15);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }

        .news-sidebar-item span:first-child {
            width: 30px;
            height: 30px;
            border-radius: 8px;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .news-sidebar-item:nth-child(2) span:first-child {
            background: var(--accent);
        }

        .news-sidebar-item:nth-child(3) span:first-child {
            background: #10B981;
        }

        .news-sidebar-item:nth-child(4) span:first-child {
            background: #EF4444;
        }

        .news-sidebar-item p {
            font-size: 14px;
            font-weight: 500;
            line-height: 1.4;
            color: var(--text-main);
        }

        .empty-tip {
            background: var(--bg-light);
            border: 1px dashed var(--border-color);
            border-radius: var(--radius-md);
            padding: 36px;
            text-align: center;
            color: var(--text-sub);
            font-size: 15px;
        }

        /* ======= Stats ======= */
        .stats-section {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(30, 27, 75, 0.95)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center center;
            color: var(--text-invert);
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: rgba(99, 102, 241, 0.15);
            border-radius: 50%;
            filter: blur(80px);
        }

        .stats-grid {
            position: relative;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
        }

        .stat-card {
            text-align: center;
            padding: 20px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(4px);
        }

        .stat-number {
            font-size: 44px;
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .stat-card:nth-child(2) .stat-number {
            color: var(--accent-light);
        }

        .stat-card:nth-child(3) .stat-number {
            color: #A5B4FC;
        }

        .stat-card:nth-child(4) .stat-number {
            color: #6EE7B7;
        }

        .stat-label {
            font-size: 14px;
            color: rgba(241, 245, 249, 0.7);
            margin-top: 8px;
            font-weight: 500;
        }

        /* ======= Workflow ======= */
        .workflow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
        }

        .workflow-grid::before {
            content: "";
            position: absolute;
            top: 40px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(90deg, rgba(79, 70, 229, 0.05), rgba(79, 70, 229, 0.3), rgba(79, 70, 229, 0.05));
        }

        .workflow-step {
            text-align: center;
            position: relative;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }

        .workflow-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .workflow-step-number {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 20px;
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.3);
            position: relative;
            z-index: 1;
        }

        .workflow-step h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .workflow-step p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.65;
        }

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

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

        .featured-card {
            display: flex;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition-base);
            min-height: 220px;
        }

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

        .featured-img {
            width: 45%;
            flex-shrink: 0;
        }

        .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .featured-body {
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.5;
        }

        .featured-body p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 18px;
        }

        .featured-link {
            font-weight: 600;
            font-size: 14px;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-base), color var(--transition-base);
        }

        .featured-link:hover {
            gap: 12px;
            color: var(--primary-dark);
        }

        /* ======= FAQ ======= */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(79, 70, 229, 0.2);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            text-align: left;
            transition: color var(--transition-base);
        }

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

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-sub);
            flex-shrink: 0;
            transition: all 0.3s ease;
        }

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

        .faq-answer {
            display: none;
            padding: 0 28px 24px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.75;
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            margin-top: -6px;
        }

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

        /* ======= CTA ======= */
        .cta-section {
            position: relative;
            padding: 100px 0;
            text-align: center;
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.94), rgba(49, 46, 129, 0.97)), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center center;
            color: #fff;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -40%;
            left: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            filter: blur(40px);
        }

        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -40%;
            right: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(245, 158, 11, 0.12);
            filter: blur(50px);
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            color: #fff;
            font-size: 40px;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .cta-inner p {
            color: rgba(241, 245, 249, 0.85);
            font-size: 17px;
            margin-bottom: 36px;
        }

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

        /* ======= Footer ======= */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-invert);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand-logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand .brand-logo .logo-text {
            background: linear-gradient(135deg, #fff, #C7D2FE);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-desc {
            font-size: 14px;
            color: rgba(241, 245, 249, 0.7);
            line-height: 1.75;
            max-width: 280px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(241, 245, 249, 0.6);
            transition: color var(--transition-base), padding-left var(--transition-base);
        }

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

        .footer-contact {
            font-size: 14px;
            color: rgba(241, 245, 249, 0.6);
            line-height: 2;
        }

        .footer-contact span {
            display: block;
        }

        .footer-bottom {
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(241, 245, 249, 0.4);
        }

        .footer-bottom a {
            color: rgba(241, 245, 249, 0.4);
        }

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

        /* ======= Responsive ======= */
        @media (max-width: 1024px) {
            :root {
                --section-space: 70px;
            }

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

            .header-inner {
                padding-left: 20px;
                padding-right: 20px;
            }

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

            .channels-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }

            .news-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }

            .workflow-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }

            .workflow-grid::before {
                display: none;
            }

            .hero-inner {
                grid-template-columns: 1fr;
                gap: 48px;
                padding-top: 60px;
                padding-bottom: 60px;
            }

            .hero-content {
                padding-right: 0;
            }

            .hero h1 {
                font-size: 40px;
            }

            .hero-visual {
                max-width: 560px;
            }

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-space: 56px;
            }

            .section-title {
                font-size: 28px;
            }

            .section-desc {
                font-size: 15px;
            }

            .section-head {
                margin-bottom: 32px;
            }

            .header-inner {
                height: 64px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
                padding: 16px 20px;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                z-index: 999;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
            }

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

            .main-nav a {
                padding: 14px 18px;
                border-radius: var(--radius-md);
                font-size: 16px;
            }

            .header-actions .btn-header {
                display: none;
            }

            .hero {
                min-height: auto;
            }

            .hero-inner {
                padding-top: 48px;
                padding-bottom: 48px;
            }

            .hero h1 {
                font-size: 32px;
            }

            .hero-stats {
                gap: 20px;
                flex-wrap: wrap;
            }

            .hero-stat-number {
                font-size: 22px;
            }

            .hero-stat-label {
                font-size: 12px;
            }

            .floating-pill-2 {
                left: -8px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .channels-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

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

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

            .workflow-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .featured-card {
                flex-direction: column;
            }

            .featured-img {
                width: 100%;
                height: 200px;
            }

            .faq-question {
                padding: 18px 20px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 20px 20px;
            }

            .cta-inner h2 {
                font-size: 28px;
            }

            .cta-section {
                padding: 70px 0;
            }

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

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

            .news-item {
                gap: 14px;
                padding: 18px 0;
            }

            .news-index {
                font-size: 16px;
                min-width: 28px;
            }

            .news-content h3 {
                font-size: 15px;
            }

            .news-sidebar-list {
                gap: 8px;
            }
        }

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

            .header-inner {
                padding-left: 16px;
                padding-right: 16px;
                gap: 10px;
            }

            .brand-logo {
                font-size: 20px;
            }

            .brand-logo .logo-mark {
                width: 32px;
                height: 32px;
                font-size: 15px;
                border-radius: 8px;
            }

            .hero h1 {
                font-size: 28px;
            }

            .hero-desc {
                font-size: 15px;
            }

            .hero-buttons .btn {
                flex: 1;
                justify-content: center;
            }

            .hero-stats {
                gap: 28px;
            }

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

            .channel-cover {
                height: 180px;
            }

            .news-item {
                flex-wrap: wrap;
            }

            .news-arrow {
                display: none;
            }

            .news-meta {
                font-size: 12px;
                flex-wrap: wrap;
            }

            .footer-grid {
                padding-bottom: 32px;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #FF4D6D;
            --primary-light: #FF8FA3;
            --primary-dark: #D93A56;
            --secondary: #6C5CE7;
            --secondary-light: #A29BFE;
            --accent: #FFB347;
            --dark: #1A1A2E;
            --dark-2: #16213E;
            --dark-3: #0F172A;
            --light: #FFF5F7;
            --light-2: #F8F9FE;
            --text: #2D2D44;
            --text-weak: #6C6C8A;
            --border: #EAE8F2;
            --white: #FFFFFF;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-full: 999px;
            --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
            --shadow-md: 0 8px 24px rgba(26, 26, 46, 0.08);
            --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.12);
            --shadow-primary: 0 8px 24px rgba(255, 77, 109, 0.25);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --container-w: 1200px;
            --section-space: 96px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--white);
            overflow-x: hidden;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

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

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

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 52px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            border: 1px solid rgba(255, 77, 109, 0.15);
        }

        .section-title {
            font-size: clamp(30px, 4vw, 42px);
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--dark);
            letter-spacing: -0.02em;
        }

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

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

        .text-gradient {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-full);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--primary);
            color: var(--white);
            box-shadow: var(--shadow-primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(255, 77, 109, 0.35);
        }

        .btn-secondary {
            background: var(--white);
            color: var(--dark);
            border-color: var(--border);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-sm);
        }

        .btn-light {
            background: var(--white);
            color: var(--dark);
        }

        .btn-light:hover {
            background: var(--light);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .btn:focus-visible,
        a:focus-visible {
            outline: 3px solid rgba(255, 77, 109, 0.4);
            outline-offset: 3px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(234, 232, 242, 0.7);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 24px;
            height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .logo-mark {
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-size: 18px;
            font-weight: 800;
            letter-spacing: -0.5px;
            box-shadow: 0 4px 14px rgba(255, 77, 109, 0.3);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--dark);
        }

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

        .main-nav a {
            padding: 10px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-full);
            position: relative;
            transition: var(--transition);
        }

        .main-nav a:hover {
            color: var(--primary);
            background: var(--light);
        }

        .main-nav a.active {
            color: var(--primary);
            font-weight: 700;
            background: var(--light);
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn-header {
            padding: 10px 22px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--light);
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }

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

        .nav-toggle span,
        .nav-toggle span::before,
        .nav-toggle span::after {
            content: '';
            position: absolute;
            left: 50%;
            width: 18px;
            height: 2px;
            background: var(--dark);
            border-radius: 2px;
            transform: translateX(-50%);
            transition: var(--transition);
        }

        .nav-toggle span {
            top: 50%;
            transform: translate(-50%, -50%);
        }

        .nav-toggle span::before {
            top: -6px;
        }

        .nav-toggle span::after {
            top: 6px;
        }

        .nav-toggle.open span {
            background: transparent;
        }

        .nav-toggle.open span::before {
            top: 0;
            transform: translateX(-50%) rotate(45deg);
        }

        .nav-toggle.open span::after {
            top: 0;
            transform: translateX(-50%) rotate(-45deg);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 120px 0 100px;
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 60%, #2D1B4E 100%);
            overflow: hidden;
            isolation: isolate;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.25;
            z-index: -2;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.85) 0%, rgba(22, 33, 62, 0.6) 100%);
            z-index: -1;
        }

        .banner-content {
            max-width: 780px;
            text-align: center;
            margin: 0 auto;
            color: var(--white);
        }

        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--white);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 20px;
            border-radius: var(--radius-full);
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }

        .banner-content h1 {
            font-size: clamp(36px, 6vw, 56px);
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 20px;
            letter-spacing: -0.03em;
        }

        .banner-content p {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .banner-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .banner-meta {
            margin-top: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
        }

        .banner-meta span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            background: var(--light-2);
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
            font-size: 14px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .sep {
            color: #C2C0D4;
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
        }

        /* ===== Cards ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .card-item {
            background: var(--white);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
        }

        .card-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .card-thumb {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

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

        .card-item:hover .card-thumb img {
            transform: scale(1.05);
        }

        .card-body {
            padding: 24px;
        }

        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--dark);
            transition: var(--transition);
        }

        .card-item:hover .card-body h3 {
            color: var(--primary);
        }

        .card-body p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-weak);
            margin-bottom: 18px;
        }

        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-weak);
        }

        .card-tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--light);
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
        }

        /* ===== Trend Section ===== */
        .trend-section {
            background: var(--light-2);
        }

        .trend-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .trend-item {
            display: flex;
            gap: 18px;
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border);
            transition: var(--transition);
            align-items: flex-start;
        }

        .trend-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: rgba(255, 77, 109, 0.2);
        }

        .trend-num {
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: var(--white);
            font-size: 16px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(255, 77, 109, 0.25);
        }

        .trend-item-content h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--dark);
        }

        .trend-item-content p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
        }

        /* ===== Flow Section ===== */
        .flow-section {
            background: var(--white);
        }

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

        .flow-grid::before {
            content: '';
            position: absolute;
            top: 36px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
            opacity: 0.3;
            z-index: 0;
        }

        .flow-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .flow-icon {
            width: 72px;
            height: 72px;
            border-radius: 24px;
            background: var(--white);
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin: 0 auto 20px;
            border: 1px solid var(--border);
            position: relative;
        }

        .flow-step h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
        }

        .flow-step p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
            max-width: 220px;
            margin: 0 auto;
        }

        /* ===== Case Gallery ===== */
        .case-section {
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
            position: relative;
            overflow: hidden;
        }

        .case-section .section-title {
            color: var(--white);
        }

        .case-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        .case-section .section-tag {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.15);
            color: var(--white);
        }

        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .case-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            aspect-ratio: 4 / 3;
            cursor: pointer;
            background-size: cover;
            background-position: center;
            transition: var(--transition);
        }

        .case-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26, 26, 46, 0) 30%, rgba(26, 26, 46, 0.85) 100%);
            transition: var(--transition);
        }

        .case-card:hover::before {
            background: linear-gradient(180deg, rgba(26, 26, 46, 0.1) 0%, rgba(26, 26, 46, 0.9) 100%);
        }

        .case-card-content {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 24px;
            color: var(--white);
            transform: translateY(6px);
            transition: var(--transition);
        }

        .case-card:hover .case-card-content {
            transform: translateY(0);
        }

        .case-card-content h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .case-card-content p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.5;
            opacity: 0;
            transform: translateY(8px);
            transition: var(--transition);
        }

        .case-card:hover .case-card-content p {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Community ===== */
        .community-section {
            background: var(--light-2);
        }

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

        .community-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .community-media img {
            width: 100%;
            display: block;
        }

        .community-content h2 {
            font-size: clamp(28px, 3vw, 36px);
            line-height: 1.3;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--dark);
        }

        .community-content p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-weak);
            margin-bottom: 24px;
        }

        .community-points {
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-bottom: 28px;
        }

        .community-point {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
        }

        .community-point .check {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
            margin-top: 3px;
        }

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

        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

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

        .faq-item:hover {
            border-color: rgba(255, 77, 109, 0.2);
            box-shadow: var(--shadow-sm);
        }

        .faq-q {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            position: relative;
            user-select: none;
        }

        .faq-q::after {
            content: '+';
            font-size: 24px;
            color: var(--primary);
            font-weight: 300;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-q::after {
            content: '−';
            transform: rotate(180deg);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-a {
            max-height: 300px;
            padding-bottom: 20px;
        }

        .faq-a p {
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-weak);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -60%;
            left: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
            color: var(--white);
        }

        .cta-inner h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .cta-inner p {
            font-size: 16px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 32px;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark-3);
            color: rgba(255, 255, 255, 0.75);
            padding: 80px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 18px;
        }

        .footer-brand .logo-text {
            color: var(--white);
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }

        .footer-title {
            color: var(--white);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
            display: inline-block;
        }

        .footer-col ul li a:hover {
            color: var(--white);
            transform: translateX(4px);
        }

        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ===== Mobile Nav ===== */
        @media (max-width: 1024px) {
            :root {
                --section-space: 80px;
            }

            .header-inner {
                height: 68px;
            }

            .main-nav {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 24px;
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                z-index: 999;
                border-radius: 0 0 20px 20px;
            }

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

            .main-nav a {
                padding: 14px 18px;
                font-size: 16px;
                border-radius: 12px;
            }

            .main-nav a.active {
                background: var(--light);
            }

            .main-nav a.active::after {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .btn-header {
                display: none;
            }

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

            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }

            .flow-grid::before {
                display: none;
            }

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

            .community-wrap {
                grid-template-columns: 1fr;
                gap: 36px;
            }

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

        @media (max-width: 768px) {
            :root {
                --section-space: 64px;
            }

            .container {
                padding: 0 20px;
            }

            .page-banner {
                padding: 80px 0 64px;
            }

            .banner-content h1 {
                font-size: 34px;
            }

            .banner-content p {
                font-size: 15px;
            }

            .trend-list {
                grid-template-columns: 1fr;
            }

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

            .case-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

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

            .cta-section {
                padding: 64px 0;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0 16px;
                gap: 12px;
            }

            .logo-mark {
                width: 38px;
                height: 38px;
            }

            .logo-text {
                font-size: 18px;
            }

            .banner-meta {
                gap: 16px;
                font-size: 13px;
            }

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

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

            .btn {
                padding: 12px 22px;
                font-size: 14px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #FF4D6D;
            --primary-dark: #E63E5C;
            --primary-light: #FFE4E9;
            --secondary: #7C5CFF;
            --secondary-light: #EEEBFF;
            --accent: #00C2A8;
            --dark: #1A1A2E;
            --dark-2: #232342;
            --text: #2A2A3A;
            --text-light: #6B6B80;
            --bg: #F8F9FE;
            --bg-white: #FFFFFF;
            --border: #E8E8F0;
            --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 26, 46, 0.08);
            --shadow-lg: 0 12px 40px rgba(26, 26, 46, 0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-full: 999px;
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 40px;
            --space-xl: 64px;
            --space-2xl: 96px;
            --container: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        
        body {
            font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }
        
        img {
            max-width: 100%;
            display: block;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        
        ul, ol {
            list-style: none;
        }

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

        /* ============ HEADER ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            -webkit-backdrop-filter: blur(20px);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(232, 232, 240, 0.8);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
            background: rgba(255, 255, 255, 0.97);
        }

        .header-inner {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 var(--space-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: var(--space-md);
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-mark {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 16px;
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 77, 109, 0.3);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            letter-spacing: -0.02em;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
        }

        .main-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            position: relative;
            transition: var(--transition);
        }

        .main-nav a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .main-nav a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: var(--radius-full);
            background: var(--primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-full);
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.4;
            text-align: center;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 16px rgba(255, 77, 109, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 77, 109, 0.45);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(255, 77, 109, 0.3);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(255, 77, 109, 0.4);
            outline-offset: 2px;
        }

        .btn-header {
            padding: 10px 22px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 6px;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            background: none;
            border: 1px solid var(--border);
            cursor: pointer;
            align-items: center;
            transition: var(--transition);
            padding: 0;
        }

        .nav-toggle span,
        .nav-toggle span::before,
        .nav-toggle span::after {
            content: '';
            display: block;
            width: 20px;
            height: 2px;
            background: var(--dark);
            border-radius: 2px;
            position: relative;
            transition: var(--transition);
        }

        .nav-toggle span::before {
            position: absolute;
            top: -7px;
        }

        .nav-toggle span::after {
            position: absolute;
            top: 7px;
        }

        .nav-toggle.open span {
            background: transparent;
        }

        .nav-toggle.open span::before {
            top: 0;
            transform: rotate(45deg);
        }

        .nav-toggle.open span::after {
            top: 0;
            transform: rotate(-45deg);
        }

        .nav-toggle:focus-visible {
            outline: 3px solid rgba(255, 77, 109, 0.4);
        }

        /* ============ HERO BANNER ============ */
        .page-hero {
            position: relative;
            padding: 160px 0 90px;
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 55%, #33336b 100%);
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 0;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(90deg, rgba(26, 26, 46, 0.88) 0%, rgba(26, 26, 46, 0.65) 50%, rgba(26, 26, 46, 0.4) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: var(--space-lg);
            align-items: center;
        }

        .hero-left h1 {
            color: #fff;
            font-size: 48px;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.03em;
        }

        .hero-left h1 span {
            background: linear-gradient(135deg, #FFB8C5, #FF4D6D);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-left p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 18px;
            line-height: 1.8;
            max-width: 540px;
            margin-bottom: 32px;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 24px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .badge i {
            color: #FFB8C5;
        }

        .hero-right {
            position: relative;
            display: flex;
            justify-content: center;
        }

        .hero-card {
            background: rgba(255, 255, 255, 0.98);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-lg);
            max-width: 400px;
            width: 100%;
            backdrop-filter: blur(10px);
            transform: rotate(2deg);
            transition: var(--transition);
        }

        .hero-card:hover {
            transform: rotate(0deg) scale(1.02);
        }

        .hero-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
        }

        .hero-card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
        }

        .hero-card-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
        }

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

        .hero-card-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .hero-card-item:hover {
            border-color: var(--primary);
            background: var(--primary-light);
            transform: translateX(4px);
        }

        .hero-card-item-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            flex-shrink: 0;
        }

        .hero-card-item:nth-child(2) .hero-card-item-dot {
            background: var(--secondary);
        }

        .hero-card-item:nth-child(3) .hero-card-item-dot {
            background: var(--accent);
        }

        .hero-card-item-text {
            font-size: 14px;
            color: var(--text);
            font-weight: 500;
        }

        .hero-card-item-percent {
            margin-left: auto;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
        }

        /* ============ SECTION GENERAL ============ */
        .section {
            padding: 80px 0;
        }

        .section-alt {
            background: var(--bg-white);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .section-title {
            font-size: 38px;
            font-weight: 900;
            color: var(--dark);
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.8;
        }

        /* ============ FUNCTION CARDS ============ */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: transparent;
        }

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

        .feature-icon {
            width: 54px;
            height: 54px;
            border-radius: 14px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            margin-bottom: 20px;
            transition: var(--transition);
        }

        .feature-card:nth-child(2) .feature-icon {
            background: var(--secondary-light);
            color: var(--secondary);
        }

        .feature-card:nth-child(3) .feature-icon {
            background: #E6FBF8;
            color: var(--accent);
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .feature-card p {
            font-size: 14.5px;
            color: var(--text-light);
            line-height: 1.75;
        }

        .feature-card:hover .feature-icon {
            transform: scale(1.08) rotate(-6deg);
        }

        /* ============ CONTENT GRID ============ */
        .content-section {
            padding: 80px 0;
            background: var(--bg);
        }

        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

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

        .content-card-image {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

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

        .content-card:hover .content-card-image img {
            transform: scale(1.08);
        }

        .content-card-image::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(to top, rgba(26, 26, 46, 0.4), transparent 60%);
        }

        .content-card-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            padding: 4px 14px;
            border-radius: var(--radius-full);
            background: rgba(255, 255, 255, 0.92);
            color: var(--dark);
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(6px);
        }

        .content-card-body {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .content-card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 12px;
        }

        .content-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .content-card-meta i {
            color: var(--primary);
            font-size: 12px;
        }

        .content-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .content-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .content-card-link {
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: var(--transition);
        }

        .content-card-link:hover {
            gap: 12px;
            color: var(--primary-dark);
        }

        /* ============ DATA SECTION ============ */
        .data-section {
            background: var(--dark);
            position: relative;
            overflow: hidden;
            padding: 70px 0;
        }

        .data-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
        }

        .data-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            text-align: center;
        }

        .data-item {
            padding: 24px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }

        .data-item:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 77, 109, 0.4);
            transform: translateY(-4px);
        }

        .data-number {
            font-size: 48px;
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 8px;
            font-family: inherit;
        }

        .data-number .unit {
            font-size: 24px;
            color: #FFB8C5;
        }

        .data-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 0.02em;
        }

        /* ============ PROCESS / STEPS ============ */
        .process-section {
            padding: 80px 0;
            background: var(--bg-white);
        }

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

        .process-grid::before {
            content: '';
            position: absolute;
            top: 36px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-light), var(--primary), var(--secondary), var(--secondary-light));
            opacity: 0.3;
        }

        .process-item {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .process-number {
            width: 72px;
            height: 72px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 900;
            color: #fff;
            box-shadow: 0 8px 24px rgba(255, 77, 109, 0.25);
            position: relative;
        }

        .process-number::after {
            content: '';
            position: absolute;
            inset: -6px;
            border-radius: 50%;
            border: 2px solid rgba(255, 77, 109, 0.2);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); opacity: 1; }
            100% { transform: scale(1.3); opacity: 0; }
        }

        .process-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
        }

        .process-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            max-width: 220px;
            margin: 0 auto;
        }

        /* ============ FAQ ============ */
        .faq-section {
            padding: 80px 0;
            background: var(--bg);
        }

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

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            transition: var(--transition);
            font-family: inherit;
        }

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

        .faq-question:focus-visible {
            outline: 3px solid rgba(255, 77, 109, 0.3);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14.5px;
            color: var(--text-light);
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        /* ============ CTA ============ */
        .cta-section {
            padding: 80px 0;
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            animation: float 8s ease-in-out infinite;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            animation: float 6s ease-in-out infinite reverse;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-20px); }
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 38px;
            font-weight: 900;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            line-height: 1.3;
        }

        .cta-inner p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .btn-white {
            background: #fff;
            color: var(--primary-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            padding: 14px 36px;
            font-size: 16px;
        }

        .btn-white:hover {
            background: var(--dark);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        }

        .btn-ghost-white {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.4);
            padding: 12px 32px;
            font-size: 16px;
            backdrop-filter: blur(4px);
        }

        .btn-ghost-white:hover {
            background: rgba(255, 255, 255, 0.3);
            color: #fff;
            border-color: #fff;
            transform: translateY(-3px);
        }

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

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 70px 0 0;
            position: relative;
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand-logo {
            margin-bottom: 18px;
        }

        .footer-brand .logo-text {
            color: #fff;
        }

        .footer-brand .logo-mark {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 300px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul a:hover {
            color: #FFB8C5;
            transform: translateX(4px);
        }

        .footer-col ul a::before {
            content: '›';
            font-weight: 700;
        }

        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 12px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-contact span {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom span:last-child {
            color: rgba(255, 255, 255, 0.5);
        }

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

            .page-hero {
                padding: 140px 0 60px;
            }

            .hero-left h1 {
                font-size: 38px;
            }

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

            .hero-right {
                display: none;
            }

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

            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

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

            .process-grid::before {
                display: none;
            }

            .process-item {
                padding: 16px;
            }

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

        @media (max-width: 768px) {
            body {
                font-size: 15px;
            }

            .header-inner {
                height: 64px;
                gap: 12px;
                padding: 0 16px;
            }

            .logo-text {
                font-size: 18px;
            }

            .logo-mark {
                width: 36px;
                height: 36px;
                font-size: 14px;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 16px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                transform: translateY(-120%);
                transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                align-items: stretch;
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .main-nav a {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 15px;
            }

            .main-nav a.active::after {
                display: none;
            }

            .main-nav a.active {
                background: var(--primary-light);
            }

            .nav-toggle {
                display: flex;
            }

            .header-actions .btn-header {
                display: none;
            }

            .page-hero {
                padding: 120px 0 48px;
            }

            .hero-left h1 {
                font-size: 32px;
            }

            .hero-left p {
                font-size: 16px;
            }

            .section {
                padding: 60px 0;
            }

            .section-title {
                font-size: 28px;
            }

            .section-header {
                margin-bottom: 40px;
            }

            .feature-grid,
            .content-grid {
                grid-template-columns: 1fr;
            }

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

            .data-number {
                font-size: 36px;
            }

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

            .cta-inner h2 {
                font-size: 28px;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .btn-white,
            .btn-ghost-white {
                width: 100%;
                max-width: 300px;
            }

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

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

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }

            .header-inner {
                padding: 0 14px;
                gap: 8px;
            }

            .logo-text {
                font-size: 16px;
            }

            .logo-mark {
                width: 32px;
                height: 32px;
                font-size: 13px;
                border-radius: 10px;
            }

            .hero-left h1 {
                font-size: 26px;
            }

            .hero-left p {
                font-size: 15px;
            }

            .hero-badges {
                gap: 6px;
            }

            .badge {
                font-size: 12px;
                padding: 4px 12px;
            }

            .section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 24px;
            }

            .section-desc {
                font-size: 14px;
            }

            .feature-card {
                padding: 24px 20px;
            }

            .content-card-image {
                height: 180px;
            }

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

            .data-item {
                padding: 20px;
            }

            .cta-section {
                padding: 60px 0;
            }

            .cta-inner h2 {
                font-size: 24px;
            }

            .cta-inner p {
                font-size: 15px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: article */
:root {
  --primary: #6C5CE7;
  --primary-dark: #5848D0;
  --primary-light: #EFECFB;
  --secondary: #00B894;
  --secondary-light: #E2F9F2;
  --ink: #14142B;
  --text: #33334D;
  --text-soft: #6E6E89;
  --text-mute: #9A9AB0;
  --bg: #F7F7FC;
  --bg-soft: #F0F0F7;
  --card: #FFFFFF;
  --line: #E4E4F0;
  --radius-lg: 20px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 10px rgba(20,20,43,.05);
  --shadow: 0 6px 24px rgba(20,20,43,.07);
  --shadow-lg: 0 16px 40px rgba(20,20,43,.10);
  --primary-shadow: 0 8px 24px rgba(108,92,231,.30);
  --secondary-shadow: 0 8px 24px rgba(0,184,148,.25);
  --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", sans-serif;
  --header-h: 72px;
  --container: 1200px;
  --transition: all .25s ease;
}

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

html { scroll-behavior: smooth; }

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

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* === Header === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .5px;
  flex-shrink: 0;
}
.logo-text {
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
  letter-spacing: .5px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  background: var(--bg-soft);
  border-radius: 14px;
}
.main-nav a {
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-soft);
  transition: var(--transition);
}
.main-nav a:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.main-nav a.active {
  background: var(--card);
  color: var(--primary);
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(20,20,43,.08);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  transition: var(--transition);
  cursor: pointer;
  text-align: center;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--primary-shadow);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(108,92,231,.38);
}
.btn-outline {
  border-color: var(--line);
  background: var(--card);
  color: var(--text);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}
.btn-light {
  background: #fff;
  color: var(--primary);
}
.btn-light:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}
.btn-outline-light {
  border: 1px solid rgba(255,255,255,.5);
  color: #fff;
  background: transparent;
}
.btn-outline-light:hover {
  background: rgba(255,255,255,.1);
  transform: translateY(-2px);
}
.btn-header {
  padding: 8px 18px;
  font-size: 13px;
}
.btn-block {
  width: 100%;
}
.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--bg-soft);
  position: relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 12px;
  width: 16px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle span { top: 19px; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.open span::after { top: 0; transform: rotate(-45deg); }

/* === Article Hero === */
.article-hero {
  padding: 80px 0 64px;
  background: linear-gradient(135deg, rgba(20,20,43,.86) 0%, rgba(108,92,231,.78) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.article-hero .hero-inner {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.7);
  margin-bottom: 18px;
}
.breadcrumb a {
  color: rgba(255,255,255,.85);
  transition: var(--transition);
}
.breadcrumb a:hover { color: #fff; }
.breadcrumb-sep { opacity: .5; }
.breadcrumb .current {
  color: #fff;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 280px;
}
.badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .5px;
}
.badge-primary {
  background: rgba(255,255,255,.18);
  color: #fff;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,.25);
}
.article-title {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.3;
  font-weight: 800;
  margin: 16px 0 20px;
  letter-spacing: .5px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 13px;
  color: rgba(255,255,255,.75);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-item i {
  font-size: 14px;
  opacity: .85;
}

/* === Article Main === */
.article-main-section {
  padding: 56px 0 70px;
  background: var(--bg);
}
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
}
.article-main {
  min-width: 0;
}
.article-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-bottom: 28px;
  background: var(--bg-soft);
}
.article-cover img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.article-summary {
  background: var(--primary-light);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 28px;
  border-left: 4px solid var(--primary);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

/* 文章正文排版 */
.article-content {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
  word-wrap: break-word;
}
.article-content p {
  margin-bottom: 1.6em;
}
.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  margin: 2em 0 .8em;
  padding-bottom: .4em;
  border-bottom: 1px solid var(--line);
}
.article-content h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  margin: 1.8em 0 .6em;
}
.article-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin: 1.5em 0 .5em;
}
.article-content ul,
.article-content ol {
  padding-left: 1.4em;
  margin-bottom: 1.6em;
}
.article-content ul li {
  list-style: disc;
  margin-bottom: .4em;
}
.article-content ol li {
  list-style: decimal;
  margin-bottom: .4em;
}
.article-content blockquote {
  margin: 1.8em 0;
  padding: 16px 24px;
  background: var(--bg-soft);
  border-left: 4px solid var(--secondary);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-soft);
  font-style: italic;
}
.article-content img {
  border-radius: var(--radius);
  margin: 1.5em 0;
  box-shadow: var(--shadow);
}
.article-content a {
  color: var(--primary);
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.article-content a:hover {
  border-bottom-color: var(--primary);
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 14px;
}
.article-content td,
.article-content th {
  padding: 10px 14px;
  border: 1px solid var(--line);
  text-align: left;
}
.article-content th {
  background: var(--bg-soft);
  font-weight: 600;
}
.article-content code {
  background: var(--bg-soft);
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 14px;
}
.article-content pre {
  background: var(--ink);
  color: #fff;
  padding: 18px 20px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.6em 0;
}
.article-content pre code {
  background: transparent;
  color: #fff;
}

/* 标签 */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.tags-label {
  font-size: 14px;
  color: var(--text-soft);
  display: flex;
  align-items: center;
  gap: 6px;
}
.tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
}
.tag:hover {
  background: var(--primary);
  color: #fff;
}

/* 分享 */
.article-share {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.share-label {
  font-size: 14px;
  color: var(--text-soft);
  margin-right: 4px;
}
.share-btn {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--bg-soft);
  color: var(--text-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: 14px;
}
.share-btn:hover {
  background: var(--primary);
  color: #fff;
}

/* 作者卡 */
.article-author-box {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 36px;
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.author-avatar {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  flex-shrink: 0;
}
.author-info h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}
.author-info p {
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.6;
}

/* 未找到 */
.not-found-box {
  text-align: center;
  padding: 80px 20px;
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.not-found-box i {
  font-size: 48px;
  color: var(--text-mute);
  margin-bottom: 16px;
}
.not-found-box h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 12px;
}
.not-found-box p {
  color: var(--text-soft);
  margin-bottom: 24px;
}

/* === 侧边栏 === */
.article-side {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.side-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.side-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.side-card-title i {
  color: var(--primary);
}
.side-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.side-list li:first-child {
  padding-top: 0;
}
.side-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.side-list a {
  display: block;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  transition: var(--transition);
  font-weight: 500;
}
.side-list a:hover {
  color: var(--primary);
}
.side-list-meta {
  display: block;
  font-size: 12px;
  color: var(--text-mute);
  margin-top: 4px;
}
.author-card {
  text-align: center;
}
.author-card .author-avatar {
  margin: 0 auto 14px;
}
.author-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}
.author-card p {
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.6;
  margin-bottom: 14px;
}
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.subscribe-card {
  background: linear-gradient(135deg, var(--primary), #9188F0);
  color: #fff;
  border: none;
}
.subscribe-card .side-card-title {
  color: #fff;
}
.subscribe-card .side-card-title i {
  color: #fff;
}
.subscribe-card p {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255,255,255,.9);
  margin-bottom: 16px;
}
.subscribe-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 10px;
  border: none;
  font-size: 14px;
  margin-bottom: 12px;
  outline: none;
  transition: var(--transition);
}
.subscribe-input:focus {
  box-shadow: 0 0 0 3px rgba(255,255,255,.35);
}
.subscribe-form .btn-light {
  box-shadow: 0 4px 14px rgba(0,0,0,.12);
}

/* === 相关推荐 === */
.related-section {
  padding: 56px 0;
  background: var(--bg-soft);
}
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  gap: 16px;
  flex-wrap: wrap;
}
.section-head h2 {
  font-size: 26px;
  font-weight: 800;
  color: var(--ink);
  position: relative;
  padding-bottom: 10px;
}
.section-head h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 42px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}
.link-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}
.link-more:hover {
  gap: 10px;
  color: var(--primary-dark);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: block;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.related-cover {
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--bg-soft);
}
.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.related-card:hover .related-cover img {
  transform: scale(1.05);
}
.related-info {
  padding: 20px;
}
.related-info .badge {
  background: var(--primary-light);
  color: var(--primary);
  margin-bottom: 8px;
}
.related-info h3 {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
  margin: 10px 0 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-info p {
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  padding: 40px 20px;
  background: var(--card);
  border-radius: var(--radius-lg);
  color: var(--text-soft);
  font-size: 14px;
  border: 1px dashed var(--line);
}

/* === CTA === */
.cta-section {
  padding: 72px 0;
  background: linear-gradient(135deg, rgba(20,20,43,.9) 0%, rgba(108,92,231,.82) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  text-align: center;
}
.cta-inner {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 20px;
}
.cta-inner h2 {
  font-size: clamp(24px, 3.5vw, 34px);
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: .5px;
}
.cta-inner p {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255,255,255,.85);
  margin-bottom: 30px;
}
.cta-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* === Footer === */
.site-footer {
  background: var(--ink);
  color: rgba(255,255,255,.72);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand .brand-logo {
  margin-bottom: 16px;
}
.footer-brand .logo-text {
  color: #fff;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255,255,255,.55);
  max-width: 340px;
}
.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: .5px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: 14px;
  color: rgba(255,255,255,.6);
  transition: var(--transition);
}
.footer-col ul a:hover {
  color: #fff;
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
  color: rgba(255,255,255,.6);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: 13px;
  color: rgba(255,255,255,.4);
  flex-wrap: wrap;
  gap: 8px;
}

/* === Responsive === */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-side {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--card);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    transition: transform .3s ease;
    border-radius: 0;
  }
  .main-nav.open {
    transform: translateY(0);
  }
  .main-nav a {
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 15px;
  }
  .nav-toggle {
    display: block;
  }
}
@media (max-width: 768px) {
  .article-hero {
    padding: 56px 0 40px;
  }
  .header-inner {
    padding: 0 16px;
  }
  .container {
    padding: 0 16px;
  }
  .article-layout {
    gap: 28px;
  }
  .article-side {
    grid-template-columns: 1fr;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .cta-section {
    padding: 50px 0;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}
@media (max-width: 520px) {
  .logo-text {
    font-size: 16px;
  }
  .header-actions .btn-header {
    display: none;
  }
  .article-title {
    font-size: 24px;
  }
  .article-content {
    font-size: 15px;
    line-height: 1.82;
  }
  .article-summary {
    padding: 16px 18px;
    font-size: 14px;
  }
  .article-author-box {
    flex-direction: column;
    text-align: center;
  }
  .article-meta {
    gap: 12px;
    font-size: 12px;
  }
  .breadcrumb .current {
    max-width: 180px;
  }
  .section-head h2 {
    font-size: 22px;
  }
  .cta-buttons .btn {
    width: 100%;
  }
}

/* roulang page: category3 */
:root {
  --primary: #6d5efc;
  --primary-dark: #5a4be0;
  --primary-light: #eef0ff;
  --secondary: #ff7a59;
  --secondary-light: #fff1ec;
  --bg: #f7f8fc;
  --bg-white: #ffffff;
  --bg-deep: #171631;
  --text: #1c1e2e;
  --text-body: #4a4d63;
  --text-weak: #8b8ea3;
  --border: #e4e6f0;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(28,30,46,.05);
  --shadow-md: 0 10px 30px rgba(28,30,46,.08);
  --shadow-lg: 0 22px 50px rgba(28,30,46,.12);
  --transition: all .3s ease;
  --container: 1200px;
  --space-section: 96px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; border: none; cursor: pointer; background: none; }
h1, h2, h3, h4, h5 { margin: 0; color: var(--text); font-weight: 700; line-height: 1.3; }
p { margin: 0; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand-logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: -0.5px;
  box-shadow: 0 4px 14px rgba(109,94,252,.35);
}
.logo-text { font-size: 20px; font-weight: 800; color: var(--text); letter-spacing: -0.3px; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-body);
  transition: var(--transition);
}
.main-nav a:hover { color: var(--primary); background: var(--primary-light); }
.main-nav a.active { color: var(--primary); background: var(--primary-light); }
.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  padding: 10px 24px;
  border-radius: 999px;
  transition: var(--transition);
  border: 2px solid transparent;
  line-height: 1.4;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 18px rgba(109,94,252,.32); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 26px rgba(109,94,252,.4); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(109,94,252,.3); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.btn-outline:hover { background: rgba(255,255,255,.12); border-color: #fff; transform: translateY(-2px); }
.btn-header { padding: 8px 20px; font-size: 14px; }
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary-light);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--primary); border-radius: 2px; transition: var(--transition); }

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  padding: 104px 0 88px;
  background: linear-gradient(135deg, rgba(23,22,49,.92), rgba(109,94,252,.85)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
  overflow: hidden;
  text-align: center;
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 80px;
  background: radial-gradient(closest-side, rgba(255,255,255,.14), transparent 70%);
}
.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,.72);
  margin-bottom: 18px;
  background: rgba(255,255,255,.1);
  padding: 6px 16px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}
.breadcrumb a { color: #fff; }
.breadcrumb a:hover { opacity: .8; }
.page-hero h1 {
  color: #fff;
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 18px;
}
.page-hero .hero-lead {
  font-size: clamp(16px, 2.2vw, 19px);
  color: rgba(255,255,255,.88);
  max-width: 720px;
  margin: 0 auto 34px;
  line-height: 1.8;
}
.hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ===== Section Shared ===== */
.section-padding { padding: var(--space-section) 0; }
.section-padding-sm { padding: 64px 0; }
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 18px;
  border-radius: 999px;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.section-header h2 { font-size: clamp(26px, 3.6vw, 38px); letter-spacing: -0.5px; margin-bottom: 14px; }
.section-header p { font-size: 16px; color: var(--text-weak); line-height: 1.8; }

/* ===== Timeline ===== */
.update-timeline { background: var(--bg-white); border-bottom: 1px solid var(--border); }
.timeline {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
  padding: 0 10px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--primary-light), var(--border));
  border-radius: 2px;
}
.timeline-item {
  position: relative;
  padding-left: 52px;
  margin-bottom: 40px;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: 6px;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid var(--bg-white);
  box-shadow: 0 0 0 4px var(--primary-light);
}
.timeline-content {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 26px;
  transition: var(--transition);
}
.timeline-content:hover { box-shadow: var(--shadow-md); border-color: var(--primary); transform: translateY(-2px); }
.timeline-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }
.timeline-date { font-size: 13px; font-weight: 700; color: var(--primary); }
.timeline-version {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-weak);
  background: var(--bg-white);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 999px;
}
.timeline-content h3 { font-size: 18px; margin-bottom: 8px; }
.timeline-content p { font-size: 15px; line-height: 1.75; color: var(--text-body); }

/* ===== Feature Grid ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: var(--primary); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.feature-icon svg { width: 26px; height: 26px; }
.feature-card h3 { font-size: 17px; margin-bottom: 10px; }
.feature-card p { font-size: 14px; line-height: 1.75; color: var(--text-weak); }

/* ===== Topics ===== */
.hot-topics { background: var(--bg-white); }
.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.topic-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.topic-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: var(--primary); }
.topic-media { position: relative; overflow: hidden; aspect-ratio: 16/10; }
.topic-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.topic-card:hover .topic-media img { transform: scale(1.04); }
.topic-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(23,22,49,.35));
}
.topic-body { padding: 22px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.tag {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: 999px;
  align-self: flex-start;
  margin-bottom: 12px;
}
.tag-warning { color: #d97706; background: #fef3c7; }
.tag-success { color: #059669; background: #d1fae5; }
.topic-body h3 { font-size: 17px; margin-bottom: 10px; line-height: 1.5; }
.topic-body p { font-size: 14px; line-height: 1.75; color: var(--text-weak); flex: 1; }
.read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  margin-top: 16px;
}
.read-more svg { width: 14px; height: 14px; transition: transform .3s; }
.read-more:hover svg { transform: translateX(4px); }

/* ===== Stats ===== */
.stats-section {
  background: linear-gradient(135deg, var(--bg-deep), #2a2350);
  color: #fff;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 320px;
  height: 320px;
  background: radial-gradient(closest-side, rgba(109,94,252,.3), transparent 70%);
  border-radius: 50%;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
  position: relative;
  z-index: 1;
}
.stat-item { padding: 20px 10px; }
.stat-icon { font-size: 30px; margin-bottom: 12px; display: inline-block; }
.stat-number {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  letter-spacing: -1px;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 6px;
}
.stat-number em { font-style: normal; color: var(--secondary); }
.stat-label { font-size: 15px; color: rgba(255,255,255,.72); }

/* ===== FAQ ===== */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  transition: var(--transition);
  overflow: hidden;
}
.faq-item:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  list-style: none;
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 26px;
  font-weight: 400;
  color: var(--primary);
  transition: var(--transition);
  flex-shrink: 0;
  line-height: 1;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-answer { padding: 0 26px 22px; font-size: 15px; line-height: 1.8; color: var(--text-body); border-top: 1px dashed var(--border); margin: 0 26px; padding-left: 0; padding-right: 0; }

/* ===== CTA ===== */
.cta-section { padding: var(--space-section) 0; }
.cta-box {
  position: relative;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 22px;
  padding: 56px 40px;
  text-align: center;
  color: #fff;
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  width: 260px;
  height: 260px;
  right: -60px;
  top: -60px;
  background: radial-gradient(closest-side, rgba(255,255,255,.18), transparent 70%);
  border-radius: 50%;
}
.cta-box h2 { color: #fff; font-size: clamp(24px, 3.4vw, 34px); margin-bottom: 14px; letter-spacing: -0.4px; }
.cta-box p { color: rgba(255,255,255,.85); font-size: 16px; max-width: 560px; margin: 0 auto 30px; line-height: 1.8; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; position: relative; z-index: 1; }
.btn-light { background: #fff; color: var(--primary); box-shadow: 0 8px 24px rgba(0,0,0,.12); }
.btn-light:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0,0,0,.16); }

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-deep);
  color: rgba(255,255,255,.72);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
}
.footer-brand .brand-logo { margin-bottom: 16px; }
.footer-brand .logo-text { color: #fff; }
.footer-desc { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.62); max-width: 260px; }
.footer-title {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,.6); transition: var(--transition); }
.footer-col ul li a:hover { color: #fff; padding-left: 5px; }
.footer-contact { display: flex; flex-direction: column; gap: 10px; font-size: 14px; color: rgba(255,255,255,.6); line-height: 1.6; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255,255,255,.48);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root { --space-section: 72px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .topic-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .header-inner { height: 64px; }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    box-shadow: 0 20px 40px rgba(28,30,46,.12);
    border-radius: 0 0 16px 16px;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    border-bottom: 1px solid var(--border);
    gap: 4px;
  }
  .main-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .main-nav a { padding: 12px 16px; border-radius: 10px; font-size: 16px; text-align: center; }
  .nav-toggle { display: flex; }
  .nav-toggle.active span:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
  .nav-toggle.active span:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }
  .page-hero { padding: 80px 0 64px; }
  .hero-actions .btn { width: 100%; max-width: 280px; }
  .feature-grid { grid-template-columns: 1fr; }
  .topic-grid { grid-template-columns: 1fr; }
  .timeline { padding: 0; }
  .timeline-content { padding: 20px; }
  .cta-box { padding: 40px 24px; border-radius: 16px; }
  .cta-actions .btn { width: 100%; max-width: 300px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .header-inner { padding: 0 16px; }
  .btn-header { display: none; }
  .main-nav { top: 64px; }
  .section-header h2 { font-size: 26px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item { padding: 14px 6px; }
  .timeline-item { padding-left: 42px; }
  .topic-body { padding: 18px 16px 20px; }
  .faq-item summary { padding: 18px; font-size: 15px; }
  .faq-answer { margin: 0 18px; padding: 0 0 18px; font-size: 14px; }
  .cta-box { padding: 32px 18px; }
  .cta-box h2 { font-size: 24px; }
}