/* roulang page: index */
:root {
            --primary: #E8453C;
            --primary-light: #FF6B4A;
            --primary-rgb: 232, 69, 60;
            --dark: #1A1D29;
            --dark-light: #2A2F3F;
            --warm-white: #F5F0EB;
            --accent: #FFB81C;
            --text-main: #1A1D29;
            --text-secondary: #5A5D66;
            --text-muted: #9EA0A8;
            --border-light: #E8E6E1;
            --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --card-shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.12);
            --card-radius-lg: 16px;
            --card-radius-md: 12px;
            --card-radius-sm: 8px;
            --btn-radius: 50px;
            --spacing-section: 80px;
            --max-width: 1200px;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            background: #fff;
            color: var(--text-main);
            line-height: 1.8;
            font-weight: 400;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        h1, h2, h3, h4, .h1, .h2, .h3 {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 0.5em;
        }

        h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--dark);
        }

        h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--dark);
        }

        h3 {
            font-size: 1.25rem;
            font-weight: 600;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: #c12e28;
        }

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

        button, input, textarea, select {
            font-family: inherit;
        }

        .container-main {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 导航栏 */
        .nav-fixed {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
        }

        .nav-brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 60px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--dark);
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
        }

        .nav-cta-btn {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--btn-radius);
            font-weight: 700;
            font-size: 0.9rem;
            text-decoration: none;
            display: inline-block;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            border: none;
            cursor: pointer;
        }

        .nav-cta-btn:hover {
            transform: scale(1.03);
            box-shadow: 0 8px 20px rgba(232, 69, 60, 0.35);
            color: #fff;
        }

        .nav-channel-row {
            background: #F8F7F5;
            border-bottom: 1px solid var(--border-light);
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        .nav-channel-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            gap: 8px;
            height: 44px;
            align-items: center;
            white-space: nowrap;
        }

        .nav-channel-tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            text-decoration: none;
            transition: background 0.2s ease, color 0.2s ease;
            font-weight: 500;
        }

        .nav-channel-tag:hover {
            background: rgba(232, 69, 60, 0.1);
            color: var(--primary);
        }

        .nav-channel-tag.active {
            color: var(--primary);
            position: relative;
        }

        .nav-channel-tag.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--dark);
            cursor: pointer;
            padding: 8px;
            line-height: 1;
        }

        .mobile-menu-overlay {
            display: none;
            position: fixed;
            top: 104px;
            left: 0;
            width: 100%;
            height: calc(100vh - 104px);
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            z-index: 999;
            flex-direction: column;
            padding: 32px 24px;
            gap: 8px;
            overflow-y: auto;
        }

        .mobile-menu-overlay.open {
            display: flex;
        }

        .mobile-menu-overlay .nav-channel-tag {
            font-size: 1.1rem;
            padding: 14px 16px;
            border-radius: 12px;
            display: block;
        }

        /* 首屏 Hero */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(180deg, var(--dark) 0%, var(--dark-light) 100%);
            overflow: hidden;
            margin-top: 104px;
        }

        .hero-data-streams {
            position: absolute;
            inset: 0;
            pointer-events: none;
        }

        .hero-data-streams svg {
            width: 100%;
            height: 100%;
            opacity: 0.25;
        }

        .hero-data-streams line {
            stroke: var(--primary);
            stroke-width: 1;
            stroke-linecap: round;
            animation: dataFlow 3s ease-in-out infinite alternate;
        }

        @keyframes dataFlow {
            0% {
                stroke-dashoffset: 400;
                opacity: 0.2;
            }
            100% {
                stroke-dashoffset: 0;
                opacity: 0.6;
            }
        }

        .hero-card {
            background: #fff;
            border-radius: 24px;
            max-width: 700px;
            width: 90%;
            padding: 48px;
            position: relative;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            z-index: 2;
        }

        .hero-card h1 {
            margin-bottom: 16px;
            color: var(--dark);
        }

        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            padding: 14px 32px;
            border-radius: var(--btn-radius);
            font-weight: 700;
            font-size: 1rem;
            text-decoration: none;
            display: inline-block;
            transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: scale(1.03);
            box-shadow: 0 10px 28px rgba(232, 69, 60, 0.4);
            filter: brightness(1.05);
            color: #fff;
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            padding: 14px 32px;
            border-radius: var(--btn-radius);
            font-weight: 700;
            font-size: 1rem;
            text-decoration: none;
            display: inline-block;
            border: 2px solid var(--primary);
            transition: all 0.2s ease;
            cursor: pointer;
        }

        .btn-secondary:hover {
            background: rgba(232, 69, 60, 0.08);
            color: var(--primary);
        }

        .hero-badges {
            position: absolute;
            bottom: -28px;
            right: 20px;
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            z-index: 3;
        }

        .badge-capsule {
            background: var(--accent);
            color: #1A1D29;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(255, 184, 28, 0.4);
            animation: pulse-badge 2.2s ease-in-out infinite;
        }

        .badge-capsule:nth-child(2) {
            animation-delay: 0.3s;
        }
        .badge-capsule:nth-child(3) {
            animation-delay: 0.6s;
        }

        @keyframes pulse-badge {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-3px);
            }
        }

        /* 通用板块 */
        .section-block {
            padding: var(--spacing-section) 0;
        }

        .section-heading {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-heading h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
        }

        .section-heading .subtitle {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 指标看板 */
        .dashboard-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: linear-gradient(180deg, #fff 0%, var(--warm-white) 100%);
            border-radius: var(--card-radius-lg);
            padding: 32px 24px;
            box-shadow: var(--card-shadow);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            overflow: hidden;
        }

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

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 8px;
            font-weight: 500;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--primary);
            letter-spacing: -1px;
            line-height: 1.1;
        }

        .stat-trend {
            font-size: 0.85rem;
            margin-top: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .trend-up {
            color: #2E7D32;
        }
        .trend-down {
            color: #C62828;
        }

        .ring-chart {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: conic-gradient(var(--primary) 0% 94%, #E0E0E0 94% 100%);
            position: absolute;
            top: 24px;
            right: 24px;
        }

        .ring-chart::after {
            content: '';
            position: absolute;
            inset: 8px;
            background: #fff;
            border-radius: 50%;
        }

        /* 服务矩阵 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: #fff;
            border-radius: var(--card-radius-lg);
            padding: 28px 24px;
            box-shadow: var(--card-shadow);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.2s ease;
            border: 1px solid transparent;
            text-align: center;
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--card-shadow-hover);
            border-color: var(--primary);
        }

        .service-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            background: rgba(232, 69, 60, 0.08);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--primary);
        }

        .service-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--dark);
        }

        .service-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 结果对比 */
        .compare-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            max-width: 900px;
            margin: 0 auto;
        }

        .compare-col {
            border-radius: var(--card-radius-lg);
            padding: 32px;
        }

        .compare-col.traditional {
            background: #f5f5f5;
            border: 1px solid #e0e0e0;
        }

        .compare-col.jiebao {
            background: rgba(232, 69, 60, 0.04);
            border: 1px solid rgba(232, 69, 60, 0.15);
        }

        .compare-col h3 {
            text-align: center;
            margin-bottom: 24px;
        }

        .compare-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            border-bottom: 1px solid rgba(0, 0, 0, 0.06);
        }

        .compare-dimension {
            font-weight: 600;
            font-size: 0.95rem;
            flex: 1;
        }

        .compare-value {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
        }

        .progress-bar-wrap {
            width: 100px;
            height: 8px;
            background: #e0e0e0;
            border-radius: 4px;
            overflow: hidden;
            margin-left: 8px;
        }

        .progress-fill {
            height: 100%;
            border-radius: 4px;
        }

        .progress-fill.weak {
            width: 35%;
            background: #bdbdbd;
        }
        .progress-fill.strong {
            width: 88%;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
        }

        .check-icon {
            color: var(--primary);
            font-weight: bold;
        }
        .cross-icon {
            color: #9e9e9e;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--card-radius-md);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: border-color 0.2s ease;
        }

        .faq-item.active {
            border-color: var(--primary);
        }

        .faq-question {
            width: 100%;
            background: #fff;
            border: none;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            text-align: left;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--dark);
            transition: background 0.2s ease;
        }

        .faq-question:hover {
            background: #fafafa;
        }

        .faq-question .q-icon {
            width: 28px;
            height: 28px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            margin-right: 12px;
            flex-shrink: 0;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            background: #fff;
            padding: 0 24px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 0 24px 20px;
            background: var(--warm-white);
        }

        .faq-toggle-icon {
            font-size: 1.1rem;
            transition: transform 0.25s ease;
            color: var(--text-muted);
        }

        .faq-item.active .faq-toggle-icon {
            transform: rotate(45deg);
            color: var(--primary);
        }

        /* 转化表单 */
        .contact-section {
            background: linear-gradient(180deg, var(--dark) 0%, var(--dark-light) 100%);
            padding: 80px 0;
            position: relative;
        }

        .form-card {
            background: #fff;
            border-radius: 24px;
            max-width: 600px;
            margin: 0 auto;
            padding: 44px 40px;
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
            position: relative;
            z-index: 2;
        }

        .form-card h2 {
            text-align: center;
            margin-bottom: 8px;
        }

        .form-subtitle {
            text-align: center;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        .form-input, .form-textarea {
            width: 100%;
            padding: 14px 16px;
            border: 1px solid var(--border-light);
            border-radius: 8px;
            font-size: 0.95rem;
            margin-bottom: 16px;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
            background: #fafafa;
        }

        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(232, 69, 60, 0.1);
            background: #fff;
        }

        .form-submit {
            width: 100%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border: none;
            padding: 16px 32px;
            border-radius: var(--btn-radius);
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            height: 52px;
        }

        .form-submit:hover {
            transform: scale(1.02);
            box-shadow: 0 12px 28px rgba(232, 69, 60, 0.45);
        }

        .contact-badges {
            display: flex;
            gap: 16px;
            justify-content: center;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        .contact-badge {
            background: rgba(255, 255, 255, 0.08);
            color: var(--accent);
            padding: 10px 20px;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.85rem;
            border: 1px solid rgba(255, 184, 28, 0.3);
        }

        /* 页脚 */
        .site-footer {
            background: var(--dark);
            color: var(--text-muted);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .footer-links h4 {
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 14px;
            font-weight: 600;
        }

        .footer-links a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 8px;
            transition: color 0.2s ease;
        }

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

        .footer-contact p {
            font-size: 0.9rem;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-contact i {
            color: var(--primary);
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 40px;
            padding: 18px 20px;
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
            background: rgba(0, 0, 0, 0.2);
        }

        .footer-bottom strong {
            color: #fff;
            font-weight: 600;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .dashboard-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-channel-row {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .hero-section {
                min-height: 70vh;
                margin-top: 60px;
            }
            .hero-card {
                padding: 28px;
            }
            .hero-badges {
                position: static;
                justify-content: center;
                margin-top: 20px;
            }
            .dashboard-grid {
                grid-template-columns: 1fr;
            }
            .services-grid {
                grid-template-columns: 1fr 1fr;
            }
            .compare-wrapper {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .nav-brand-row .nav-cta-btn {
                display: none;
            }
        }

        @media (max-width: 520px) {
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.45rem;
            }
            .services-grid {
                grid-template-columns: 1fr;
            }
            .hero-cta-group {
                flex-direction: column;
            }
            .hero-card {
                padding: 20px;
            }
            .stat-number {
                font-size: 2rem;
            }
            .form-card {
                padding: 24px 20px;
            }
            .section-block {
                padding: 48px 0;
            }
        }