/* roulang page: index */
:root {
            --primary: #0EA65A;
            --primary-dark: #0A8045;
            --primary-light: #E8F7EE;
            --accent: #FF6B00;
            --accent-hover: #E65A00;
            --dark-surface: #0F172A;
            --dark-card: #1E293B;
            --bg-gray: #F8FAFC;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
            --card-shadow: 0 10px 25px -5px rgba(0,0,0,0.05);
            --card-shadow-hover: 0 20px 30px -10px rgba(0,0,0,0.12);
            --radius-md: 12px;
            --radius-lg: 16px;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *, *::before, *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #FFFFFF;
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4, h5, h6 {
            color: #0F172A;
            font-weight: 700;
            line-height: 1.3;
        }

        p {
            color: var(--text-muted);
            margin-bottom: 1.25rem;
        }

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

        a:hover, a:focus {
            color: var(--primary-dark);
        }

        /* 统一容器与板块规范 */
        .site-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        .section-block {
            padding: 5.5rem 0;
            position: relative;
        }

        .section-bg-gray {
            background-color: var(--bg-gray);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .section-bg-dark {
            background-color: var(--dark-surface);
            color: #FFFFFF;
        }

        .section-bg-dark h2, .section-bg-dark h3, .section-bg-dark h4 {
            color: #FFFFFF;
        }

        .section-bg-dark p {
            color: #94A3B8;
        }

        .section-header {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 3.5rem auto;
        }

        .section-subtitle {
            display: inline-block;
            font-size: 0.875rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            color: var(--primary);
            background-color: var(--primary-light);
            padding: 0.35rem 0.85rem;
            border-radius: 9999px;
            margin-bottom: 1rem;
        }

        .section-bg-dark .section-subtitle {
            background-color: rgba(14, 166, 90, 0.2);
            color: #34D399;
        }

        .section-title {
            font-size: 2.25rem;
            margin-bottom: 1rem;
        }

        .section-desc {
            font-size: 1.05rem;
            line-height: 1.75;
        }

        /* 顶部通栏 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
        }

        .top-bar-info {
            background-color: #0F172A;
            color: #94A3B8;
            font-size: 0.8125rem;
            padding: 0.4rem 0;
        }

        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: #0F172A;
        }

        .brand-logo span {
            color: var(--primary);
        }

        .logo-symbol {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), #059669);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 900;
            font-size: 1.1rem;
        }

        .nav-actions .btn-main {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 1.5rem;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 600;
            background-color: var(--primary);
            color: #FFFFFF;
            border: none;
            cursor: pointer;
            transition: var(--transition-smooth);
        }

        .nav-actions .btn-main:hover {
            background-color: var(--primary-dark);
            box-shadow: 0 4px 12px rgba(14, 166, 90, 0.25);
            transform: translateY(-1px);
        }

        /* 按钮与通用组件 */
        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 1.75rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            background-color: var(--accent);
            color: #FFFFFF;
            transition: var(--transition-smooth);
            border: none;
            cursor: pointer;
        }

        .btn-accent:hover {
            background-color: var(--accent-hover);
            color: #FFFFFF;
            box-shadow: 0 4px 14px rgba(255, 107, 0, 0.3);
            transform: translateY(-2px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 1.75rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            background-color: transparent;
            color: var(--text-main);
            border: 1px solid var(--border-color);
            transition: var(--transition-smooth);
        }

        .btn-outline:hover {
            background-color: var(--bg-gray);
            border-color: #CBD5E1;
            color: #0F172A;
        }

        /* Hero: Bento 矩阵布局 */
        .hero-section {
            padding: 3.5rem 0 4.5rem;
            background: radial-gradient(circle at 80% 20%, rgba(14, 166, 90, 0.08) 0%, transparent 60%), #FFFFFF;
        }

        .bento-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .bento-main {
            grid-column: span 8;
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 3rem;
            box-shadow: var(--card-shadow);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .bento-main h1 {
            font-size: 2.5rem;
            line-height: 1.25;
            margin-bottom: 1.25rem;
            letter-spacing: -0.02em;
        }

        .bento-side-1 {
            grid-column: span 4;
            background: linear-gradient(145deg, #0F172A, #1E293B);
            color: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 2rem;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .bento-side-2 {
            grid-column: span 4;
            background: var(--primary-light);
            border: 1px solid rgba(14, 166, 90, 0.2);
            border-radius: var(--radius-lg);
            padding: 2rem;
        }

        .bento-bar {
            grid-column: span 8;
            background: #F1F5F9;
            border-radius: var(--radius-lg);
            padding: 1.5rem 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
        }

        /* 现代通用卡片 */
        .modern-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2rem;
            box-shadow: var(--card-shadow);
            transition: var(--transition-smooth);
            height: 100%;
        }

        .modern-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
            border-color: #CBD5E1;
        }

        /* 痛点卡片微警示 */
        .card-pain {
            border-top: 4px solid #EF4444;
            background: #FFFFFF;
        }

        .pain-stat {
            font-size: 1.5rem;
            font-weight: 800;
            color: #EF4444;
            margin: 1rem 0 0.5rem;
        }

        /* 产线技术参数表 */
        .spec-table-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }

        .spec-table {
            width: 100%;
            border-collapse: collapse;
            margin: 0;
            font-size: 0.95rem;
        }

        .spec-table th, .spec-table td {
            padding: 1.1rem 1.5rem;
            border-bottom: 1px solid var(--border-color);
            text-align: left;
        }

        .spec-table th {
            background-color: #F8FAFC;
            color: #0F172A;
            font-weight: 700;
        }

        .spec-table tr:last-child td {
            border-bottom: none;
        }

        .badge-verified {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
        }

        /* 现场案例图文展示 */
        .case-media-box {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }

        .case-media-box img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            display: block;
        }

        .case-overlay-tag {
            position: absolute;
            top: 1.25rem;
            left: 1.25rem;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(4px);
            color: #FFFFFF;
            font-size: 0.85rem;
            font-weight: 600;
            padding: 0.4rem 0.9rem;
            border-radius: 6px;
        }

        /* 步骤流卡片 */
        .step-item {
            position: relative;
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            text-align: left;
            box-shadow: var(--card-shadow);
        }

        .step-number {
            font-size: 2.25rem;
            font-weight: 900;
            line-height: 1;
            color: var(--primary);
            opacity: 0.4;
            margin-bottom: 1rem;
        }

        /* 指标大字看板 */
        .stat-giant {
            text-align: center;
            padding: 2.5rem 1.5rem;
            border-radius: var(--radius-md);
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }

        .stat-giant-num {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1;
            color: var(--primary);
            margin-bottom: 0.75rem;
            font-feature-settings: "tnum";
        }

        /* 套件对比卡片 */
        .package-card {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            background: #FFFFFF;
            position: relative;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            height: 100%;
            box-shadow: var(--card-shadow);
        }

        .package-card.highlight {
            border: 2px solid var(--primary);
            box-shadow: 0 15px 35px -5px rgba(14, 166, 90, 0.15);
        }

        .package-badge {
            position: absolute;
            top: -12px;
            right: 24px;
            background: var(--accent);
            color: #FFFFFF;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            letter-spacing: 0.05em;
        }

        /* FAQ 手风琴 */
        .custom-accordion {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: #FFFFFF;
        }

        .custom-accordion details {
            border-bottom: 1px solid var(--border-color);
            padding: 1.25rem 1.75rem;
            transition: var(--transition-smooth);
        }

        .custom-accordion details:last-child {
            border-bottom: none;
        }

        .custom-accordion summary {
            font-weight: 700;
            font-size: 1.05rem;
            color: #0F172A;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .custom-accordion summary::-webkit-details-marker {
            display: none;
        }

        .custom-accordion summary::after {
            content: "+";
            font-size: 1.3rem;
            color: var(--text-muted);
            transition: transform 0.2s ease;
        }

        .custom-accordion details[open] summary::after {
            transform: rotate(45deg);
            color: var(--primary);
        }

        .custom-accordion .acc-body {
            margin-top: 1rem;
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text-muted);
        }

        /* 咨询表单收口卡片 */
        .cta-box-card {
            background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
            border-radius: var(--radius-lg);
            padding: 3.5rem;
            color: #FFFFFF;
            box-shadow: 0 25px 40px -10px rgba(15, 23, 42, 0.3);
        }

        .cta-box-card h2 {
            color: #FFFFFF;
        }

        .form-control-input {
            width: 100%;
            height: 48px;
            padding: 0 1rem;
            border-radius: 8px;
            border: 1px solid #334155;
            background: #0B1120;
            color: #FFFFFF;
            font-size: 0.95rem;
            margin-bottom: 1rem;
        }

        .form-control-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(14, 166, 90, 0.2);
        }

        /* 统一页脚 */
        .site-footer {
            background: #0B1120;
            color: #94A3B8;
            padding: 4.5rem 0 2rem;
            border-top: 1px solid #1E293B;
            font-size: 0.9rem;
        }

        .site-footer h4 {
            color: #F8FAFC;
            font-size: 1.05rem;
            margin-bottom: 1.25rem;
        }

        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer li {
            margin-bottom: 0.75rem;
        }

        .site-footer a {
            color: #94A3B8;
        }

        .site-footer a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            margin-top: 3.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid #1E293B;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8125rem;
        }

        /* 响应式断点修正 */
        @media screen and (max-width: 1024px) {
            .bento-grid {
                grid-template-columns: 1fr;
            }
            .bento-main, .bento-side-1, .bento-side-2, .bento-bar {
                grid-column: span 1;
            }
            .stat-giant-num {
                font-size: 2.25rem;
            }
        }

        @media screen and (max-width: 768px) {
            .section-block {
                padding: 3.5rem 0;
            }
            .section-title {
                font-size: 1.75rem;
            }
            .bento-main {
                padding: 1.75rem;
            }
            .bento-main h1 {
                font-size: 1.85rem;
            }
            .cta-box-card {
                padding: 2rem 1.25rem;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 1rem;
                text-align: center;
            }
            .top-bar-info {
                display: none;
            }
        }