/* roulang page: index */
:root {
            --deep-space: #0A0E1A;
            --champagne-gold: #C9A96E;
            --burgundy: #7B1A2B;
            --card-bg: rgba(20, 28, 45, 0.6);
            --card-border: rgba(201, 169, 110, 0.2);
            --text-primary: #B0B9CC;
            --text-secondary: #6B7280;
            --text-white: #FFFFFF;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(201, 169, 110, 0.08) inset;
            --shadow-hover: 0 12px 40px rgba(201, 169, 110, 0.15);
            --border-radius: 16px;
            --transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
            --font-inter: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-inter);
            background-color: var(--deep-space);
            color: var(--text-primary);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* 导航 */
        .main-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(10, 14, 26, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(201, 169, 110, 0.25);
            padding: 1rem 0;
        }

        .nav-grid {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--champagne-gold);
            letter-spacing: 0.03em;
            white-space: nowrap;
        }

        .search-wrapper {
            position: relative;
            flex: 1;
            max-width: 320px;
            margin: 0 auto;
        }

        .search-wrapper i {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--champagne-gold);
            font-size: 1rem;
            pointer-events: none;
        }

        #search-input {
            width: 100%;
            padding: 0.8rem 1rem 0.8rem 2.8rem;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(201, 169, 110, 0.3);
            color: #fff;
            font-size: 0.9rem;
            outline: none;
            transition: var(--transition);
        }

        #search-input::placeholder {
            color: var(--text-secondary);
        }

        #search-input:focus {
            border-color: var(--champagne-gold);
            box-shadow: 0 0 10px rgba(201, 169, 110, 0.3);
        }

        .nav-links {
            display: flex;
            gap: 1.8rem;
            list-style: none;
            font-weight: 500;
            color: var(--text-primary);
        }

        .nav-links a {
            padding: 0.4rem 0;
            position: relative;
            color: var(--text-primary);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--champagne-gold);
            transition: width 0.3s ease;
        }

        .nav-links a:hover {
            color: var(--champagne-gold);
        }

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

        .hamburger {
            display: none;
            font-size: 1.6rem;
            color: var(--champagne-gold);
            cursor: pointer;
            background: none;
            border: none;
        }

        /* Hero */
        .hero {
            min-height: 90vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            background: radial-gradient(circle at 30% 40%, rgba(201, 169, 110, 0.08) 0%, transparent 50%);
            padding: 6rem 0 3rem;
            margin-top: 70px;
        }

        .hero-grid {
            display: flex;
            align-items: center;
            gap: 3rem;
            width: 100%;
        }

        .hero-content {
            flex: 1;
        }

        .hero-content h1 {
            font-size: clamp(2.4rem, 5vw, 3.8rem);
            font-weight: 700;
            color: var(--champagne-gold);
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 1.5rem;
            text-shadow: 0 0 30px rgba(201, 169, 110, 0.25);
        }

        .hero-subtitle {
            font-size: 1.2rem;
            color: var(--text-primary);
            margin-bottom: 2rem;
            max-width: 500px;
        }

        .btn-primary {
            display: inline-block;
            background: linear-gradient(135deg, #C9A96E 0%, #A8884D 100%);
            color: #0A0E1A;
            border: none;
            border-radius: 50px;
            padding: 1rem 2.6rem;
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.06em;
            box-shadow: 0 0 25px rgba(201, 169, 110, 0.45);
            cursor: pointer;
            transition: var(--transition);
            text-transform: uppercase;
        }

        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(201, 169, 110, 0.75);
            transform: scale(1.05);
            color: #0A0E1A;
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--champagne-gold);
            color: var(--champagne-gold);
            padding: 0.9rem 2.2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }

        .btn-outline:hover {
            background: var(--champagne-gold);
            color: #0A0E1A;
        }

        .hero-image {
            flex: 1;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
            border: 1px solid rgba(201, 169, 110, 0.3);
        }

        .hero-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        /* 通用板块标题 */
        .section-title {
            font-size: clamp(1.8rem, 3.5vw, 2.4rem);
            font-weight: 600;
            color: var(--champagne-gold);
            margin-bottom: 2.5rem;
            text-align: center;
            position: relative;
        }

        .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 3px;
            background: var(--champagne-gold);
            margin: 0.8rem auto 0;
            border-radius: 2px;
        }

        .section-padding {
            padding: 5rem 0;
        }

        /* 卡片通用 */
        .glass-card {
            background: var(--card-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            padding: 2rem;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .glass-card:hover {
            border-color: rgba(201, 169, 110, 0.5);
            box-shadow: var(--shadow-hover), var(--shadow-card);
            transform: translateY(-6px);
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }

        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        /* 图标 */
        .icon-gold {
            font-size: 2.5rem;
            color: var(--champagne-gold);
            margin-bottom: 1rem;
        }

        .card-title {
            font-size: 1.3rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 0.75rem;
        }

        .feature-desc {
            color: var(--text-primary);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* 场景 */
        .scene-row {
            display: flex;
            align-items: center;
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .scene-row.reverse {
            flex-direction: row-reverse;
        }

        .scene-img {
            flex: 1;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--champagne-gold);
        }

        .scene-text {
            flex: 1;
        }

        .scene-text h3 {
            color: var(--champagne-gold);
            font-size: 1.6rem;
        }

        /* 案例数字卡 */
        .stat-number {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--champagne-gold);
        }

        /* 价格卡 */
        .pricing-card {
            background: var(--card-bg);
            backdrop-filter: blur(14px);
            border: 1px solid var(--card-border);
            border-radius: 24px;
            padding: 2.5rem 2rem;
            text-align: center;
            transition: var(--transition);
        }

        .pricing-card.featured {
            border-color: var(--champagne-gold);
            box-shadow: 0 0 30px rgba(201, 169, 110, 0.25);
            position: relative;
        }

        .badge {
            background: var(--burgundy);
            color: white;
            padding: 0.3rem 1.5rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
        }

        .price {
            font-size: 2.6rem;
            font-weight: 700;
            color: var(--champagne-gold);
        }

        /* FAQ */
        .accordion-item {
            border-bottom: 1px solid rgba(201, 169, 110, 0.25);
        }

        .accordion-title {
            background: transparent;
            color: var(--champagne-gold);
            cursor: pointer;
            padding: 1.2rem 0;
            font-weight: 600;
            font-size: 1.1rem;
            display: flex;
            justify-content: space-between;
        }

        .accordion-content {
            color: var(--text-primary);
            padding-bottom: 1rem;
            display: none;
        }

        .accordion-item.active .accordion-content {
            display: block;
        }

        /* CTA 横幅 */
        .cta-banner {
            background: radial-gradient(ellipse at center, rgba(201, 169, 110, 0.15) 0%, transparent 70%);
            text-align: center;
        }

        /* 页脚 */
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
        }

        .social-icons i {
            font-size: 1.4rem;
            color: var(--champagne-gold);
            margin-right: 1rem;
            border: 1px solid var(--champagne-gold);
            border-radius: 50%;
            padding: 0.5rem;
            transition: var(--transition);
        }

        .social-icons i:hover {
            background: var(--champagne-gold);
            color: #0A0E1A;
        }

        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .nav-links {
                display: none;
            }

            .hamburger {
                display: block;
            }
        }

        @media (max-width: 640px) {
            .grid-4,
            .grid-3 {
                grid-template-columns: 1fr;
            }

            .scene-row,
            .scene-row.reverse {
                flex-direction: column;
            }

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

            .search-wrapper {
                max-width: 100%;
            }
        }