/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary-1: #6366F1;
            --primary-2: #8B5CF6;
            --accent: #F97316;
            --accent-2: #10B981;
            --bg-page: #F9FAFB;
            --bg-card: #FFFFFF;
            --bg-dark: #1F2937;
            --text-heading: #111827;
            --text-body: #374151;
            --text-muted: #6B7280;
            --border-color: #E5E7EB;
            --radius-large: 20px;
            --radius-medium: 12px;
            --radius-small: 8px;
            --shadow-card: 0 8px 32px rgba(99, 102, 241, 0.12);
            --shadow-hover: 0 12px 40px rgba(99, 102, 241, 0.22);
            --transition: all 0.3s ease;
            --max-width: 1200px;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-body);
            background: var(--bg-page);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-heading);
            line-height: 1.3;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
        }
        .logo i {
            font-size: 1.8rem;
            background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-body);
            padding: 8px 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-links a:hover {
            color: var(--primary-1);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--primary-1);
            background: #EEF2FF;
            padding: 8px 16px;
            border-radius: var(--radius-medium);
            border: 1px solid rgba(99, 102, 241, 0.2);
        }
        .nav-links a.active::after {
            display: none;
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
            color: #fff !important;
            padding: 12px 28px !important;
            border-radius: var(--radius-medium);
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
            transition: var(--transition);
        }
        .nav-cta:hover {
            opacity: 0.9;
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
            transform: translateY(-1px);
            color: #fff !important;
        }
        .nav-cta::after {
            display: none !important;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .hamburger span {
            width: 28px;
            height: 3px;
            background: var(--primary-1);
            border-radius: 3px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 6px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -7px);
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                flex-direction: column;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                padding: 24px 16px;
                gap: 16px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                width: 100%;
                padding: 14px 16px;
                border-radius: var(--radius-medium);
                text-align: center;
                font-size: 1.1rem;
            }
            .nav-links a.active {
                background: #EEF2FF;
            }
            .nav-links a.nav-cta {
                text-align: center;
                padding: 14px 16px !important;
            }
            .nav-links a::after {
                display: none;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 90vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.82), rgba(30, 27, 75, 0.78));
            z-index: 1;
        }
        .hero-particles {
            position: absolute;
            inset: 0;
            z-index: 1;
            opacity: 0.3;
            background:
                radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.25) 0%, transparent 50%),
                radial-gradient(circle at 50% 80%, rgba(249, 115, 22, 0.15) 0%, transparent 50%);
            animation: heroGlow 8s ease-in-out infinite alternate;
        }
        @keyframes heroGlow {
            0% {
                opacity: 0.2;
                transform: scale(1);
            }
            100% {
                opacity: 0.4;
                transform: scale(1.05);
            }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            padding: 40px 24px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(16, 185, 129, 0.2);
            border: 1px solid rgba(16, 185, 129, 0.4);
            color: #34D399;
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.875rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 20px;
            text-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
        }
        .hero h1 span {
            background: linear-gradient(135deg, #A78BFA, #F472B6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
            color: #fff;
            padding: 16px 36px;
            border-radius: var(--radius-medium);
            font-size: 1.125rem;
            font-weight: 700;
            box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            opacity: 0.92;
            box-shadow: 0 8px 28px rgba(99, 102, 241, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:focus {
            outline: 2px solid var(--primary-2);
            outline-offset: 2px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            padding: 15px 34px;
            border-radius: var(--radius-medium);
            font-size: 1.125rem;
            font-weight: 600;
            border: 2px solid rgba(255, 255, 255, 0.5);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-secondary:focus {
            outline: 2px solid rgba(255, 255, 255, 0.6);
            outline-offset: 2px;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            justify-content: center;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: #34D399;
            display: block;
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 80vh;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .num {
                font-size: 1.6rem;
            }
            .btn-primary,
            .btn-secondary {
                padding: 14px 28px;
                font-size: 1rem;
                width: 100%;
                justify-content: center;
            }
            .hero-buttons {
                flex-direction: column;
                width: 100%;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-stats {
                gap: 16px;
                flex-direction: column;
                align-items: center;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: #F3F4F6;
        }
        .section-dark {
            background: var(--bg-dark);
            color: #fff;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .section-title p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title.light h2 {
            color: #fff;
        }
        .section-title.light p {
            color: rgba(255, 255, 255, 0.7);
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--spacing-section-mobile) 0;
            }
            .section-title h2 {
                font-size: 1.6rem;
            }
        }

        /* ===== Agenda Timeline ===== */
        .agenda-grid {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }
        .agenda-grid::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 120px;
            width: 2px;
            background: linear-gradient(to bottom, var(--primary-1), var(--primary-2), transparent);
            opacity: 0.3;
        }
        .agenda-item {
            display: flex;
            gap: 32px;
            padding: 24px 0;
            position: relative;
        }
        .agenda-time {
            width: 100px;
            flex-shrink: 0;
            text-align: right;
            font-weight: 700;
            font-size: 1rem;
            color: var(--primary-1);
            padding-top: 4px;
            position: relative;
        }
        .agenda-time::after {
            content: '';
            position: absolute;
            right: -20px;
            top: 10px;
            width: 14px;
            height: 14px;
            background: var(--primary-1);
            border-radius: 50%;
            border: 3px solid var(--bg-page);
            box-shadow: 0 0 0 2px var(--primary-1);
            z-index: 2;
        }
        .agenda-card {
            flex: 1;
            background: var(--bg-card);
            border-radius: var(--radius-large);
            padding: 24px 28px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid rgba(99, 102, 241, 0.06);
        }
        .agenda-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .agenda-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-heading);
        }
        .agenda-card .speaker {
            font-size: 0.9rem;
            color: var(--primary-1);
            font-weight: 600;
            margin-bottom: 8px;
        }
        .agenda-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .agenda-grid::before {
                left: 20px;
            }
            .agenda-item {
                flex-direction: column;
                gap: 12px;
                padding-left: 40px;
            }
            .agenda-time {
                width: auto;
                text-align: left;
                font-size: 0.95rem;
            }
            .agenda-time::after {
                left: -28px;
                right: auto;
                top: 6px;
            }
            .agenda-card {
                padding: 18px 20px;
            }
        }

        /* ===== Speakers / Highlights ===== */
        .speakers-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 28px;
        }
        .speaker-card {
            background: var(--bg-card);
            border-radius: var(--radius-large);
            padding: 32px 24px 28px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid rgba(99, 102, 241, 0.06);
        }
        .speaker-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .speaker-avatar {
            width: 96px;
            height: 96px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 16px;
            border: 3px solid rgba(99, 102, 241, 0.15);
            background: #EEF2FF;
        }
        .speaker-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .speaker-card .title {
            font-size: 0.9rem;
            color: var(--primary-1);
            font-weight: 600;
            margin-bottom: 10px;
        }
        .speaker-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        @media (max-width: 520px) {
            .speakers-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Ticket Pricing ===== */
        .tickets-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            max-width: 1000px;
            margin: 0 auto;
        }
        .ticket-card {
            background: var(--bg-card);
            border-radius: var(--radius-large);
            padding: 36px 28px 32px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 2px solid transparent;
            position: relative;
        }
        .ticket-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .ticket-card.featured {
            border-color: var(--primary-1);
            background: linear-gradient(135deg, #FDF2FF, #EEF2FF);
            transform: scale(1.04);
            z-index: 2;
        }
        .ticket-card.featured:hover {
            transform: scale(1.04) translateY(-6px);
        }
        .ticket-card .badge-popular {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(135deg, var(--accent), #F43F5E);
            color: #fff;
            padding: 4px 20px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        .ticket-card h3 {
            font-size: 1.4rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .ticket-card .price {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary-1);
            margin-bottom: 4px;
        }
        .ticket-card .price small {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-muted);
        }
        .ticket-card .desc {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }
        .ticket-card ul {
            text-align: left;
            margin-bottom: 24px;
            padding: 0 8px;
        }
        .ticket-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .ticket-card ul li:last-child {
            border-bottom: none;
        }
        .ticket-card ul li i {
            color: var(--accent-2);
            width: 18px;
            flex-shrink: 0;
        }
        .ticket-card .btn-ticket {
            display: block;
            width: 100%;
            padding: 14px;
            border-radius: var(--radius-medium);
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            border: 2px solid var(--primary-1);
            background: transparent;
            color: var(--primary-1);
            cursor: pointer;
        }
        .ticket-card .btn-ticket:hover {
            background: var(--primary-1);
            color: #fff;
        }
        .ticket-card.featured .btn-ticket {
            background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
            color: #fff;
            border: none;
        }
        .ticket-card.featured .btn-ticket:hover {
            opacity: 0.92;
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
        }
        @media (max-width: 900px) {
            .tickets-grid {
                grid-template-columns: 1fr;
                max-width: 420px;
            }
            .ticket-card.featured {
                transform: none;
            }
            .ticket-card.featured:hover {
                transform: translateY(-6px);
            }
        }

        /* ===== Latest News / CMS List ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 28px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-large);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid rgba(99, 102, 241, 0.06);
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .news-card .img-wrap {
            width: 100%;
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .news-card .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .news-card:hover .img-wrap img {
            transform: scale(1.08);
        }
        .news-card .img-wrap .category-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
            color: #fff;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .news-card .body {
            padding: 20px 22px 24px;
        }
        .news-card .body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
        }
        .news-card .body h3 a {
            color: var(--text-heading);
            transition: var(--transition);
        }
        .news-card .body h3 a:hover {
            color: var(--primary-1);
        }
        .news-card .body .summary {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .news-card .body .meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .news-card .body .meta .date {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .news-card .body .read-more {
            color: var(--primary-1);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .news-card .body .read-more:hover {
            color: var(--primary-2);
            gap: 10px;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-large);
            box-shadow: var(--shadow-card);
        }
        .news-empty i {
            font-size: 3rem;
            color: var(--text-muted);
            opacity: 0.3;
            margin-bottom: 16px;
        }
        .news-empty p {
            font-size: 1.1rem;
            color: var(--text-muted);
        }
        @media (max-width: 520px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-medium);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        .faq-item:hover {
            border-color: rgba(99, 102, 241, 0.2);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-heading);
            cursor: pointer;
            transition: var(--transition);
            user-select: none;
            gap: 16px;
        }
        .faq-question i {
            color: var(--primary-1);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question .faq-toggle {
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: #EEF2FF;
            color: var(--primary-1);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-toggle {
            transform: rotate(45deg);
            background: var(--primary-1);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        @media (max-width: 520px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
            padding: 100px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 27, 75, 0.84));
            z-index: 1;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .cta-content h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .cta-content .btn-primary {
            font-size: 1.2rem;
            padding: 18px 48px;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 64px 0;
            }
            .cta-content h2 {
                font-size: 1.8rem;
            }
            .cta-content p {
                font-size: 1rem;
            }
            .cta-content .btn-primary {
                padding: 16px 36px;
                font-size: 1.05rem;
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 48px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-col h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col p {
            font-size: 0.95rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-col .logo-footer {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, #A78BFA, #F472B6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 12px;
            display: inline-block;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #A78BFA;
        }
        .footer-col .contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-col .contact-item i {
            width: 20px;
            color: var(--primary-1);
        }
        .footer-bottom {
            text-align: center;
            padding: 24px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom span {
            color: rgba(255, 255, 255, 0.6);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding: 0 16px 32px;
            }
            .footer-col h3 {
                margin-bottom: 12px;
            }
        }

        /* ===== Scroll to top ===== */
        .scroll-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: var(--transition);
            z-index: 999;
            cursor: pointer;
            border: none;
        }
        .scroll-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .scroll-top:hover {
            opacity: 0.9;
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.5);
        }
        @media (max-width: 520px) {
            .scroll-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary-start: #6366F1;
            --primary-mid: #7C3AED;
            --primary-end: #8B5CF6;
            --accent: #F97316;
            --accent-green: #10B981;
            --bg-page: #F9FAFB;
            --bg-card: #FFFFFF;
            --bg-dark: #1F2937;
            --text-dark: #111827;
            --text-body: #374151;
            --text-muted: #6B7280;
            --border-color: #E5E7EB;
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 32px rgba(99, 102, 241, 0.12);
            --shadow-hover: 0 16px 48px rgba(99, 102, 241, 0.22);
            --transition: all 0.3s ease;
            --max-width: 1200px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-page);
            color: var(--text-body);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: var(--transition);
        }

        ul {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
        }

        .logo i {
            font-size: 1.6rem;
            background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-links a {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-body);
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-links a:hover {
            color: var(--primary-start);
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-links a.active {
            color: var(--primary-start);
            background: #EEF2FF;
            padding: 6px 16px;
            border-radius: 24px;
            border: 1px solid rgba(99, 102, 241, 0.25);
        }

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

        .nav-links a.nav-cta {
            background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
            transition: var(--transition);
        }

        .nav-links a.nav-cta:hover {
            opacity: 0.92;
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.45);
            transform: translateY(-1px);
            color: #fff;
        }

        .nav-links a.nav-cta::after {
            display: none;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            background: none;
            border: none;
        }

        .hamburger span {
            display: block;
            width: 28px;
            height: 3px;
            background: var(--primary-start);
            border-radius: 3px;
            transition: var(--transition);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            padding: 14px 0;
        }

        .breadcrumb-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        .breadcrumb-inner a {
            color: var(--primary-start);
            font-weight: 500;
        }

        .breadcrumb-inner a:hover {
            text-decoration: underline;
        }

        .breadcrumb-inner .sep {
            margin: 0 8px;
            color: #ccc;
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 60px 0 80px;
        }

        .article-container {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 20px;
        }

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

        .article-header h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1.3;
            margin-bottom: 20px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            align-items: center;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta .meta-item i {
            color: var(--primary-start);
            font-size: 0.85rem;
        }

        .article-meta .category-badge {
            background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.8;
            color: var(--text-body);
        }

        .article-body p {
            margin-bottom: 1.5rem;
        }

        .article-body h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 2rem 0 1rem;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--border-color);
        }

        .article-body h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 1.5rem 0 0.8rem;
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 1.5rem auto;
            box-shadow: var(--shadow-card);
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary-start);
            background: #EEF2FF;
            padding: 16px 24px;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-body);
            font-style: italic;
        }

        .article-body ul,
        .article-body ol {
            margin: 1rem 0 1.5rem 1.5rem;
        }

        .article-body li {
            margin-bottom: 0.5rem;
        }

        .article-body ul li::marker {
            color: var(--primary-start);
        }

        .article-body a {
            color: var(--primary-start);
            font-weight: 600;
            text-decoration: underline;
        }

        .article-body a:hover {
            color: var(--primary-end);
        }

        /* Not found */
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }

        .article-not-found i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-size: 2rem;
            color: var(--text-dark);
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .article-not-found .btn-back {
            display: inline-block;
            padding: 12px 32px;
            background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
            color: #fff;
            border-radius: var(--radius-md);
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
        }

        .article-not-found .btn-back:hover {
            opacity: 0.92;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
        }

        /* ===== Related Posts ===== */
        .related-section {
            background: var(--bg-card);
            padding: 60px 0;
            border-top: 1px solid var(--border-color);
        }

        .related-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
            text-align: center;
            margin-bottom: 40px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .related-card {
            background: var(--bg-page);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            transition: var(--transition);
        }

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

        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .related-card .card-body {
            padding: 20px;
        }

        .related-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .related-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .related-card .card-meta a {
            color: var(--primary-start);
            font-weight: 600;
        }

        .related-card .card-meta a:hover {
            text-decoration: underline;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 0;
        }

        .footer-grid {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.2fr;
            gap: 48px;
        }

        .footer-col .logo-footer {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col .logo-footer i {
            background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-col p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-col h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 36px;
            height: 2px;
            background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
            border-radius: 2px;
        }

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

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--primary-start);
            padding-left: 4px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }

        .contact-item i {
            width: 20px;
            color: var(--primary-start);
            font-size: 1rem;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 48px;
            padding: 20px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom span {
            color: var(--primary-start);
            font-weight: 600;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }

            .hamburger {
                display: flex;
            }

            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-card);
                flex-direction: column;
                padding: 20px 24px;
                gap: 16px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 2px solid var(--border-color);
            }

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

            .nav-links a {
                width: 100%;
                padding: 12px 0;
                font-size: 1.05rem;
                border-bottom: 1px solid var(--border-color);
            }

            .nav-links a.active {
                background: #EEF2FF;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }

            .nav-links a.nav-cta {
                text-align: center;
                padding: 14px 0;
                border-bottom: none;
            }

            .article-header h1 {
                font-size: 1.8rem;
            }

            .article-main {
                padding: 40px 0 60px;
            }

            .article-container {
                padding: 0 16px;
            }

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

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

        @media (max-width: 480px) {
            .article-header h1 {
                font-size: 1.5rem;
            }

            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .breadcrumb-inner {
                font-size: 0.8rem;
            }

            .related-card .card-img {
                height: 140px;
            }
        }

        /* ===== Hamburger animation ===== */
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Fade in ===== */
        .fade-in {
            animation: fadeIn 0.6s ease forwards;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

/* roulang page: category1 */
/* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            font-size: 1rem;
            line-height: 1.6;
            color: #374151;
            background: #F9FAFB;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: inherit; text-decoration: none; transition: all 0.3s ease; }
        img { max-width: 100%; height: auto; display: block; border-radius: 12px; }
        button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; transition: all 0.3s ease; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: #111827; }

        /* ===== Variables ===== */
        :root {
            --primary-start: #6366F1;
            --primary-end: #8B5CF6;
            --primary-gradient: linear-gradient(135deg, #6366F1, #8B5CF6);
            --accent: #F97316;
            --green: #10B981;
            --bg-light: #F9FAFB;
            --card-bg: #FFFFFF;
            --dark-bg: #1F2937;
            --title-color: #111827;
            --body-color: #374151;
            --muted-color: #6B7280;
            --border-color: #E5E7EB;
            --radius-large: 20px;
            --radius-medium: 12px;
            --radius-small: 8px;
            --shadow-card: 0 8px 32px rgba(99, 102, 241, 0.12);
            --shadow-btn: 0 4px 12px rgba(99, 102, 241, 0.3);
            --transition: all 0.3s ease;
            --container-max: 1200px;
            --section-gap: 80px;
            --section-gap-mobile: 48px;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 20px rgba(0,0,0,0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
        }
        .logo i { font-size: 1.6rem; -webkit-text-fill-color: initial; color: var(--primary-start); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--body-color);
            border-radius: var(--radius-medium);
            position: relative;
            transition: var(--transition);
        }
        .nav-links a:hover {
            color: var(--primary-start);
            background: #EEF2FF;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--primary-gradient);
            transform: scaleX(0);
            transition: transform 0.3s ease;
            border-radius: 2px;
        }
        .nav-links a:hover::after { transform: scaleX(1); }
        .nav-links a.active {
            background: #EEF2FF;
            color: var(--primary-start);
            font-weight: 600;
        }
        .nav-links a.active::after { transform: scaleX(1); }
        .nav-cta {
            background: var(--primary-gradient) !important;
            color: #fff !important;
            padding: 12px 28px !important;
            border-radius: var(--radius-medium) !important;
            font-weight: 600 !important;
            box-shadow: var(--shadow-btn);
            -webkit-text-fill-color: #fff !important;
        }
        .nav-cta:hover {
            opacity: 0.9;
            box-shadow: 0 6px 20px rgba(99,102,241,0.4) !important;
            background: var(--primary-gradient) !important;
            color: #fff !important;
            transform: translateY(-1px);
        }
        .nav-cta::after { display: none !important; }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--primary-start);
            border-radius: 3px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(6px,6px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(6px,-6px); }

        /* ===== Hero ===== */
        .hero-category {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 80px 24px 60px;
            background: linear-gradient(135deg, #1F2937 0%, #111827 100%);
            overflow: hidden;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero-category::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 40%, rgba(99,102,241,0.3) 0%, transparent 70%);
        }
        .hero-category-content {
            position: relative;
            z-index: 2;
            max-width: 850px;
        }
        .hero-category h1 {
            font-size: 3rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -1px;
            text-shadow: 0 4px 30px rgba(0,0,0,0.3);
        }
        .hero-category h1 span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-category .hero-sub {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.85);
            max-width: 650px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            margin-top: 16px;
        }
        .hero-badge {
            display: flex;
            align-items: center;
            gap: 10px;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(8px);
            padding: 12px 24px;
            border-radius: var(--radius-medium);
            border: 1px solid rgba(255,255,255,0.15);
        }
        .hero-badge .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--green);
            line-height: 1;
        }
        .hero-badge .label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.8);
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
            margin-top: 32px;
        }
        .btn-primary {
            background: var(--primary-gradient);
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-medium);
            font-size: 1.125rem;
            font-weight: 700;
            box-shadow: var(--shadow-btn);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .btn-primary:hover {
            opacity: 0.9;
            box-shadow: 0 8px 28px rgba(99,102,241,0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:focus {
            outline: 2px solid var(--primary-end);
            outline-offset: 2px;
        }
        .btn-secondary {
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-medium);
            font-size: 1.125rem;
            font-weight: 700;
            border: 2px solid rgba(255,255,255,0.5);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            border-color: #fff;
            background: rgba(255,255,255,0.1);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-alt {
            background: #fff;
        }
        .section-title {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            color: var(--title-color);
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary-gradient);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            font-size: 1.1rem;
            color: var(--muted-color);
            max-width: 600px;
            margin: 0 auto;
        }

        /* ===== Highlights / 盛典亮点 ===== */
        .highlights-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .highlight-card {
            background: var(--card-bg);
            border-radius: var(--radius-large);
            padding: 32px 24px;
            box-shadow: var(--shadow-card);
            text-align: center;
            transition: var(--transition);
            border: 1px solid rgba(229,231,235,0.5);
        }
        .highlight-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 16px 48px rgba(99,102,241,0.18);
        }
        .highlight-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            background: linear-gradient(135deg, #EEF2FF, #E0E7FF);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.8rem;
            color: var(--primary-start);
        }
        .highlight-card h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: var(--title-color);
        }
        .highlight-card p {
            color: var(--muted-color);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== Timeline / 议程 ===== */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            padding-left: 40px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 16px;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(to bottom, var(--primary-start), var(--primary-end));
            border-radius: 3px;
        }
        .timeline-item {
            position: relative;
            margin-bottom: 36px;
            padding-left: 40px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 6px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--primary-gradient);
            border: 3px solid #fff;
            box-shadow: 0 0 0 2px var(--primary-start);
        }
        .timeline-item .time {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--primary-start);
            margin-bottom: 4px;
        }
        .timeline-item .card {
            background: var(--card-bg);
            border-radius: var(--radius-medium);
            padding: 20px 24px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.06);
            border: 1px solid var(--border-color);
        }
        .timeline-item .card h4 {
            font-size: 1.1rem;
            margin-bottom: 4px;
        }
        .timeline-item .card .speaker {
            color: var(--muted-color);
            font-size: 0.9rem;
        }

        /* ===== Speakers / 嘉宾 ===== */
        .speakers-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 28px;
        }
        .speaker-card {
            background: var(--card-bg);
            border-radius: var(--radius-large);
            padding: 28px 20px 24px;
            box-shadow: var(--shadow-card);
            text-align: center;
            transition: var(--transition);
            border: 1px solid rgba(229,231,235,0.4);
        }
        .speaker-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(99,102,241,0.15);
        }
        .speaker-card .avatar {
            width: 88px;
            height: 88px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 16px;
            border: 3px solid var(--primary-start);
            padding: 3px;
            background: #fff;
        }
        .speaker-card h4 {
            font-size: 1.1rem;
            margin-bottom: 4px;
        }
        .speaker-card .title {
            color: var(--primary-start);
            font-size: 0.9rem;
            font-weight: 500;
            margin-bottom: 8px;
        }
        .speaker-card .bio {
            color: var(--muted-color);
            font-size: 0.88rem;
            line-height: 1.6;
        }

        /* ===== Tickets / 票种 ===== */
        .tickets-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
            align-items: start;
        }
        .ticket-card {
            background: var(--card-bg);
            border-radius: var(--radius-large);
            padding: 36px 28px;
            box-shadow: var(--shadow-card);
            text-align: center;
            border: 2px solid transparent;
            transition: var(--transition);
            position: relative;
        }
        .ticket-card.featured {
            border-color: var(--primary-start);
            box-shadow: 0 12px 40px rgba(99,102,241,0.2);
            transform: scale(1.02);
            background: linear-gradient(135deg, #fff, #F5F3FF);
        }
        .ticket-card.featured .badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--primary-gradient);
            color: #fff;
            padding: 6px 24px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
        }
        .ticket-card h3 {
            font-size: 1.4rem;
            margin-bottom: 8px;
        }
        .ticket-card .price {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--title-color);
            margin: 12px 0;
        }
        .ticket-card .price span {
            font-size: 1.1rem;
            font-weight: 400;
            color: var(--muted-color);
        }
        .ticket-card .features {
            text-align: left;
            margin: 20px 0 28px;
            padding: 0;
        }
        .ticket-card .features li {
            padding: 8px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--body-color);
            font-size: 0.95rem;
        }
        .ticket-card .features li i {
            color: var(--green);
            font-size: 1.1rem;
            width: 20px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius-medium);
            margin-bottom: 12px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
            border: 1px solid var(--border-color);
            overflow: hidden;
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--title-color);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover { background: #F9FAFB; }
        .faq-question i {
            color: var(--primary-start);
            font-size: 1.2rem;
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-question i { transform: rotate(45deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--body-color);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1F2937, #111827);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 2.4rem;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-inner p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.8);
            margin-bottom: 32px;
        }
        .cta-inner .btn-primary {
            font-size: 1.25rem;
            padding: 16px 48px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark-bg);
            color: rgba(255,255,255,0.85);
            padding: 60px 24px 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1.2fr 1.8fr;
            gap: 40px;
            max-width: var(--container-max);
            margin: 0 auto 40px;
        }
        .logo-footer {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 14px;
        }
        .logo-footer i { -webkit-text-fill-color: initial; color: var(--primary-start); }
        .footer-col p {
            font-size: 0.95rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.65);
        }
        .footer-col h3 {
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255,255,255,0.65);
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
            font-size: 0.95rem;
            color: rgba(255,255,255,0.65);
        }
        .contact-item i {
            width: 20px;
            color: var(--primary-start);
            font-size: 1.1rem;
        }
        .footer-bottom {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: rgba(255,255,255,0.5);
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .footer-bottom span { color: #fff; font-weight: 500; }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .tickets-grid { grid-template-columns: repeat(2, 1fr); }
            .hero-category h1 { font-size: 2.4rem; }
        }
        @media (max-width: 767px) {
            .header-inner { height: 64px; }
            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                box-shadow: 0 12px 40px rgba(0,0,0,0.1);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border-color);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-links a {
                width: 100%;
                padding: 14px 18px;
                font-size: 1rem;
            }
            .nav-links a::after { display: none; }
            .nav-cta { text-align: center; margin-top: 8px; }
            .hamburger { display: flex; }
            .section { padding: var(--section-gap-mobile) 0; }
            .hero-category { min-height: 400px; padding: 60px 16px 40px; }
            .hero-category h1 { font-size: 1.9rem; }
            .hero-category .hero-sub { font-size: 1rem; }
            .hero-badges { flex-direction: column; align-items: center; gap: 12px; }
            .hero-badge { width: 100%; max-width: 280px; justify-content: center; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary { width: 100%; max-width: 320px; justify-content: center; }
            .highlights-grid { grid-template-columns: 1fr; }
            .speakers-grid { grid-template-columns: 1fr 1fr; }
            .tickets-grid { grid-template-columns: 1fr; }
            .ticket-card.featured { transform: none; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .section-title h2 { font-size: 1.7rem; }
            .cta-inner h2 { font-size: 1.8rem; }
            .timeline { padding-left: 30px; }
            .timeline-item { padding-left: 28px; }
            .timeline-item::before { left: -16px; width: 12px; height: 12px; }
        }
        @media (max-width: 480px) {
            .speakers-grid { grid-template-columns: 1fr; }
            .hero-category h1 { font-size: 1.6rem; }
            .hero-badge .num { font-size: 1.4rem; }
            .container { padding: 0 16px; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-12 { margin-top: 12px; }
        .mt-24 { margin-top: 24px; }
        .mt-36 { margin-top: 36px; }
        .gap-16 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }