/* roulang page: index */
:root {
            --brand-orange: #F15A24;
            --brand-gray: #1E1E1E;
            --brand-green: #00F0A8;
            --soft-gray: #F7F7F7;
            --text-dark: #1a1a1a;
            --text-body: #444444;
            --text-light: #888888;
            --border-light: #e0e0e0;
            --card-shadow: 0 4px 20px rgba(0,0,0,0.06);
            --card-shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
            --radius-lg: 16px;
            --radius-full: 50px;
            --spacing-section: 100px;
        }
        * {
            box-sizing: border-box;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            margin: 0;
            line-height: 1.7;
            color: var(--text-body);
            background-color: #FFFFFF;
            -webkit-font-smoothing: antialiased;
        }
        html {
            scroll-behavior: smooth;
        }
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* 双层导航 */
        .header-sticky {
            position: sticky;
            top: 0;
            z-index: 50;
            background-color: rgba(255,255,255,0.98);
            backdrop-filter: blur(8px);
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        }
        .nav-top-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
        }
        .logo-text {
            font-weight: 800;
            font-size: 1.8rem;
            letter-spacing: -0.5px;
            color: var(--brand-gray);
            text-decoration: none;
            display: inline-flex;
            align-items: baseline;
            gap: 2px;
        }
        .logo-text span {
            color: var(--brand-orange);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .search-icon {
            width: 22px;
            height: 22px;
            color: #555;
            cursor: pointer;
            transition: color 0.2s;
        }
        .search-icon:hover {
            color: var(--brand-orange);
        }
        .btn-primary {
            background-color: var(--brand-orange);
            color: white;
            border: none;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all 0.2s ease;
            text-decoration: none;
            display: inline-block;
            text-align: center;
            box-shadow: 0 4px 12px rgba(241,90,36,0.3);
        }
        .btn-primary:hover {
            background-color: #D94A1A;
            transform: scale(1.02);
            box-shadow: 0 6px 18px rgba(241,90,36,0.4);
        }
        .btn-outline {
            background: transparent;
            color: var(--brand-orange);
            border: 1.5px solid var(--brand-orange);
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all 0.2s ease;
            text-decoration: none;
            display: inline-block;
            text-align: center;
        }
        .btn-outline:hover {
            background-color: var(--brand-orange);
            color: white;
            transform: scale(1.02);
        }
        .channel-tabs {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            padding: 12px 0 16px;
            scrollbar-width: none;
            -ms-overflow-style: none;
            border-top: 1px solid #f0f0f0;
        }
        .channel-tabs::-webkit-scrollbar {
            display: none;
        }
        .pill-tab {
            flex-shrink: 0;
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: #444;
            text-decoration: none;
            transition: all 0.2s;
            background: transparent;
            white-space: nowrap;
        }
        .pill-tab:hover {
            background-color: #f5f5f5;
            color: #000;
        }
        .pill-tab.active {
            color: var(--brand-orange);
            font-weight: 600;
            border-bottom: 2px solid var(--brand-orange);
            border-radius: 0;
            background: transparent;
        }
        /* Hero */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            color: white;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30,30,30,0.85) 0%, rgba(0,0,0,0.4) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
        }
        .hero-content h1 {
            font-size: clamp(2.5rem, 5vw, 3.5rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.2rem;
            color: white;
            text-shadow: 0 2px 8px rgba(0,0,0,0.3);
        }
        .hero-content h1 .highlight {
            color: var(--brand-orange);
        }
        .hero-subtitle {
            font-size: 1.25rem;
            color: rgba(255,255,255,0.85);
            margin-bottom: 2rem;
        }
        .btn-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-light {
            background: transparent;
            border: 1.5px solid white;
            color: white;
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.2s;
            text-decoration: none;
        }
        .btn-light:hover {
            background: white;
            color: var(--brand-gray);
        }
        /* Sections */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background-color: var(--soft-gray);
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--brand-gray);
            margin-bottom: 1rem;
            text-align: center;
        }
        .section-subtitle {
            color: #666;
            text-align: center;
            max-width: 600px;
            margin: 0 auto 3rem auto;
            font-size: 1.1rem;
        }
        /* 卡片系统 */
        .card {
            background: white;
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            box-shadow: var(--card-shadow);
            transition: all 0.25s ease;
        }
        .card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-4px);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 2rem;
            color: var(--brand-orange);
        }
        /* 痛点网格 */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        /* 解决方案图文 */
        .solution-block {
            display: flex;
            align-items: center;
            gap: 60px;
            margin-bottom: 80px;
        }
        .solution-block.reverse {
            flex-direction: row-reverse;
        }
        .solution-img {
            flex: 1;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 12px 30px rgba(0,0,0,0.1);
        }
        .solution-text {
            flex: 1;
            border-left: 4px solid var(--brand-green);
            padding-left: 24px;
        }
        /* 成果数据 */
        .stats-grid {
            display: flex;
            justify-content: center;
            gap: 60px;
            text-align: center;
        }
        .stat-item .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--brand-orange);
            line-height: 1.2;
        }
        .stat-label {
            color: #555;
            margin-top: 8px;
        }
        /* 证言 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            background: #f0f2f5;
            border-radius: 20px;
            padding: 28px;
        }
        .quote-text {
            font-style: italic;
            color: #333;
            margin-bottom: 20px;
        }
        .author-row {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #ddd;
            border: 2px solid var(--brand-orange);
        }
        /* FAQ */
        .faq-item {
            border-bottom: 1px solid #e5e5e5;
            padding: 16px 0;
        }
        .faq-question {
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--brand-gray);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s;
            color: #555;
        }
        .faq-item.open .faq-answer {
            max-height: 200px;
            padding-top: 12px;
        }
        .faq-icon {
            font-size: 1.5rem;
            color: var(--brand-orange);
        }
        /* 终局CTA */
        .cta-section {
            background: linear-gradient(135deg, #1E1E1E 0%, #0a0a0a 100%);
            color: white;
            text-align: center;
            padding: 100px 0;
        }
        /* 页脚 */
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-bottom {
            border-top: 1px solid #333;
            margin-top: 40px;
            padding-top: 20px;
            text-align: center;
            color: #aaa;
            font-size: 0.9rem;
        }
        /* 响应式 */
        @media (max-width: 1024px) {
            .pain-grid, .testimonial-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stats-grid {
                flex-wrap: wrap;
                gap: 30px;
            }
            .solution-block {
                flex-direction: column;
                gap: 30px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .pain-grid, .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .section {
                padding: 60px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                flex-direction: column;
                gap: 24px;
            }
        }