/* roulang page: index */
:root {
            --primary: #ff4d2e;
            --primary-dark: #d93a20;
            --primary-soft: #ffe3dc;
            --secondary: #1f2126;
            --surface: #ffffff;
            --bg: #f5f6f8;
            --text: #1a1d23;
            --muted: #6b7280;
            --border: #e5e7eb;
            --radius-sm: 10px;
            --radius-md: 18px;
            --radius-lg: 26px;
            --shadow-sm: 0 4px 12px rgba(0,0,0,0.05);
            --shadow-md: 0 10px 30px rgba(0,0,0,0.08);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.14);
            --gradient: linear-gradient(135deg, #ff4d2e 0%, #c0243a 100%);
            --font: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --transition: 0.22s cubic-bezier(0.2, 0.8, 0.3, 1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            line-height: 1.6;
            color: var(--text);
            background-color: var(--bg);
            font-size: 16px;
            min-height: 100vh;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        .container {
            width: min(1200px, 100% - 40px);
            margin: 0 auto;
        }
        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 999;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        }
        .nav-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 14px 0;
        }
        .logo {
            font-size: 1.4rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            white-space: nowrap;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-form {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 30px;
            padding: 6px 6px 6px 16px;
            transition: var(--transition);
        }
        .search-form:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255,77,46,0.12);
        }
        .search-form input {
            width: 180px;
            font-size: 0.9rem;
            color: var(--text);
            background: transparent;
            padding: 4px 0;
        }
        .search-form input::placeholder {
            color: var(--muted);
        }
        .search-form button {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--secondary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: var(--primary);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            white-space: nowrap;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .btn-primary {
            background: var(--gradient);
            color: #fff;
            box-shadow: 0 6px 16px rgba(255,77,46,0.28);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #e63e22 0%, #a91e32 100%);
            box-shadow: 0 10px 24px rgba(255,77,46,0.38);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            border-color: var(--border);
            background: var(--surface);
            color: var(--text);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }
        .btn-dark {
            background: var(--secondary);
            color: #fff;
        }
        .btn-dark:hover {
            background: #000;
            color: #fff;
            transform: translateY(-2px);
        }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 10px 0 14px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--border) transparent;
        }
        .nav-tabs::-webkit-scrollbar {
            height: 4px;
        }
        .nav-tabs::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 10px;
        }
        .nav-tab {
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--muted);
            white-space: nowrap;
            transition: var(--transition);
        }
        .nav-tab:hover {
            color: var(--text);
            background: var(--bg);
        }
        .nav-tab.active {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 4px 10px rgba(0,0,0,0.12);
        }
        /* Hero */
        .hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            padding: 80px 0 90px;
            color: #fff;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(20,22,28,0.92) 0%, rgba(20,22,28,0.78) 50%, rgba(20,22,28,0.55) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 40px;
            align-items: center;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255,255,255,0.12);
            border: 1px solid rgba(255,255,255,0.2);
            backdrop-filter: blur(8px);
            border-radius: 30px;
            padding: 6px 14px;
            font-size: 0.85rem;
            margin-bottom: 20px;
            color: #ffd9d0;
        }
        .hero h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }
        .hero-desc {
            font-size: 1.05rem;
            line-height: 1.8;
            color: rgba(255,255,255,0.88);
            margin-bottom: 30px;
            max-width: 560px;
        }
        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .hero-stats {
            display: flex;
            gap: 28px;
            margin-top: 30px;
            flex-wrap: wrap;
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
        }
        .hero-stat strong {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
        }
        .hero-stat span {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
        }
        .hero-card {
            background: rgba(255,255,255,0.96);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            padding: 26px;
            color: var(--text);
            position: relative;
            overflow: hidden;
        }
        .hero-card .card-badge {
            position: absolute;
            top: 20px;
            right: -30px;
            background: var(--gradient);
            color: #fff;
            padding: 6px 32px;
            transform: rotate(35deg);
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.05em;
        }
        .hero-card-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 18px;
            position: relative;
        }
        .hero-card-img img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .hero-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .hero-card p {
            color: var(--muted);
            font-size: 0.95rem;
            margin-bottom: 16px;
        }
        .hero-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
            flex-wrap: wrap;
            gap: 10px;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--primary-soft);
            color: var(--primary-dark);
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .rating {
            color: #f59e0b;
            font-size: 0.85rem;
        }
        .hero-card-actions {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
            border-radius: 30px;
        }
        /* Section common */
        .section {
            padding: 70px 0;
        }
        .section-dark {
            background: var(--secondary);
            color: #fff;
        }
        .section-header {
            margin-bottom: 36px;
            max-width: 700px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 1rem;
            color: var(--muted);
            line-height: 1.7;
        }
        .section-dark .section-header p {
            color: rgba(255,255,255,0.7);
        }
        .grid {
            display: grid;
            gap: 24px;
        }
        .grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        /* Brand story & Advantages */
        .story-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .story-text h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .story-text p {
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .story-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .story-img img {
            width: 100%;
            height: 340px;
            object-fit: cover;
        }
        .advantage-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 30px;
        }
        .advantage-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .advantage-item:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: rgba(255,77,46,0.3);
        }
        .advantage-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary-soft);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 14px;
        }
        .advantage-item h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .advantage-item p {
            font-size: 0.9rem;
            color: var(--muted);
            line-height: 1.6;
        }
        /* Scene & Featured */
        .scene-panel {
            background: linear-gradient(135deg, #1f2126 0%, #3a2e2e 100%);
            border-radius: var(--radius-lg);
            padding: 40px;
            color: #fff;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            align-items: center;
            box-shadow: var(--shadow-lg);
            margin-bottom: 40px;
        }
        .scene-panel h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .scene-panel p {
            color: rgba(255,255,255,0.75);
            line-height: 1.8;
        }
        .scene-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        }
        .scene-img img {
            width: 100%;
            height: 260px;
            object-fit: cover;
        }
        .featured-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .featured-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .featured-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(255,77,46,0.25);
        }
        .featured-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .featured-card-body {
            padding: 18px;
        }
        .featured-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .featured-card p {
            font-size: 0.9rem;
            color: var(--muted);
            line-height: 1.6;
            margin-bottom: 14px;
        }
        .featured-card .badge-row {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }
        /* Reviews */
        .review-summary {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 30px;
        }
        .review-score {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }
        .review-stars {
            color: #f59e0b;
            font-size: 1.4rem;
        }
        .review-bubbles {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .bubble {
            background: var(--surface);
            border-radius: var(--radius-md);
            padding: 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .bubble:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .bubble p {
            font-size: 0.92rem;
            color: var(--text);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .bubble-user {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .bubble-user-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-soft);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }
        .bubble-user-info strong {
            display: block;
            font-size: 0.9rem;
        }
        .bubble-user-info span {
            font-size: 0.75rem;
            color: var(--muted);
        }
        /* News */
        .news-panel {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 30px;
        }
        .news-list {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 10px 0;
            box-shadow: var(--shadow-sm);
        }
        .news-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 14px 20px;
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .news-item:last-child {
            border-bottom: none;
        }
        .news-item:hover {
            background: var(--bg);
        }
        .news-item a {
            font-weight: 500;
            color: var(--text);
            flex: 1;
        }
        .news-item a:hover {
            color: var(--primary);
        }
        .news-date {
            font-size: 0.8rem;
            color: var(--muted);
            white-space: nowrap;
        }
        .news-side {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .side-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 18px;
            box-shadow: var(--shadow-sm);
        }
        .side-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .side-card ul {
            list-style: none;
        }
        .side-card li {
            padding: 8px 0;
            border-bottom: 1px dashed var(--border);
            font-size: 0.9rem;
        }
        .side-card li:last-child {
            border-bottom: none;
        }
        .side-card li a:hover {
            color: var(--primary);
        }
        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(255,77,46,0.25);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 18px 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            background: transparent;
            transition: var(--transition);
        }
        .faq-question i {
            transition: var(--transition);
            color: var(--muted);
        }
        .faq-answer {
            padding: 0 22px 18px;
            color: var(--muted);
            line-height: 1.7;
            font-size: 0.95rem;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        /* Subscribe */
        .subscribe-box {
            background: var(--gradient);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 30px;
            align-items: center;
            box-shadow: var(--shadow-lg);
            color: #fff;
        }
        .subscribe-box h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 10px;
        }
        .subscribe-box p {
            color: rgba(255,255,255,0.85);
            line-height: 1.7;
        }
        .subscribe-form {
            display: flex;
            gap: 10px;
            background: rgba(255,255,255,0.2);
            border: 1px solid rgba(255,255,255,0.3);
            border-radius: 40px;
            padding: 6px 6px 6px 20px;
            backdrop-filter: blur(8px);
            min-width: 300px;
        }
        .subscribe-form input {
            flex: 1;
            color: #fff;
            background: transparent;
        }
        .subscribe-form input::placeholder {
            color: rgba(255,255,255,0.7);
        }
        .subscribe-form button {
            background: #fff;
            color: var(--primary-dark);
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 700;
            transition: var(--transition);
        }
        .subscribe-form button:hover {
            background: var(--secondary);
            color: #fff;
        }
        /* Footer */
        .site-footer {
            background: #141518;
            color: #fff;
            padding: 50px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .footer-brand p {
            color: rgba(255,255,255,0.6);
            line-height: 1.7;
            font-size: 0.9rem;
        }
        .footer-links h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: #fff;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: #ff6b52;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.45);
        }
        /* Fixed bottom CTA */
        .fixed-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(20,21,24,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            padding: 12px 0;
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            box-shadow: 0 -4px 20px rgba(0,0,0,0.2);
            transform: translateY(100%);
            transition: transform 0.35s ease;
        }
        .fixed-cta.show {
            transform: translateY(0);
        }
        .fixed-cta .cta-text {
            color: #fff;
            font-weight: 500;
            font-size: 0.95rem;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .story-wrap {
                grid-template-columns: 1fr;
            }
            .featured-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .review-bubbles {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-panel {
                grid-template-columns: 1fr;
            }
            .subscribe-box {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-top {
                flex-wrap: wrap;
                gap: 10px;
            }
            .search-form {
                order: 3;
                width: 100%;
                flex: 1 1 100%;
            }
            .search-form input {
                width: 100%;
            }
            .nav-tabs {
                padding-bottom: 10px;
            }
            .hero {
                padding: 60px 0 70px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .grid-3, .grid-2 {
                grid-template-columns: 1fr;
            }
            .advantage-list {
                grid-template-columns: 1fr;
            }
            .featured-cards {
                grid-template-columns: 1fr;
            }
            .review-bubbles {
                grid-template-columns: 1fr;
            }
            .scene-panel {
                grid-template-columns: 1fr;
                padding: 26px;
            }
            .subscribe-box {
                padding: 30px 20px;
            }
            .subscribe-form {
                min-width: 0;
                width: 100%;
                flex-wrap: wrap;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .fixed-cta {
                flex-wrap: wrap;
                text-align: center;
                gap: 8px;
                padding: 10px 16px;
            }
        }
        @media (max-width: 520px) {
            .container {
                width: 100% - 24px;
                margin: 0 auto;
            }
            .hero h1 {
                font-size: 1.75rem;
            }
            .hero-cta .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-card {
                padding: 18px;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }