/* roulang page: index */
:root {
            --primary: #0F2042;
            --primary-light: #1A3668;
            --accent: #00D285;
            --accent-hover: #00B572;
            --accent-glow: rgba(0, 210, 133, 0.2);
            --bg-light: #F8FAFC;
            --bg-subtle: #EDF2F7;
            --bg-dark: #0B132B;
            --text-dark: #1E293B;
            --text-gray: #64748B;
            --text-light: #F8FAFC;
            --border-color: #E2E8F0;
            --border-dark: #1E2D4A;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --shadow-subtle: 0 4px 20px -2px rgba(15, 32, 66, 0.06);
            --shadow-hover: 0 12px 28px -4px rgba(0, 210, 133, 0.15);
            --shadow-dark: 0 10px 30px rgba(0, 0, 0, 0.35);
            --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --transition: all 0.25s ease-in-out;
        }

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

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

        body {
            font-family: var(--font-family);
            background-color: #FFFFFF;
            color: var(--text-dark);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        ul, ol {
            list-style: none;
        }

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

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-header {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 52px auto;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 12px;
            background: rgba(0, 210, 133, 0.1);
            padding: 4px 14px;
            border-radius: 20px;
        }

        .section-title {
            font-size: 2.1rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 18px;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-gray);
            line-height: 1.7;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 13px 28px;
            font-size: 0.98rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            cursor: pointer;
            border: 1px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--accent);
            color: var(--primary);
        }

        .btn-primary:hover {
            background-color: var(--accent-hover);
            box-shadow: 0 6px 18px var(--accent-glow);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.4);
            color: #FFFFFF;
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(0, 210, 133, 0.05);
        }

        .btn-subtle {
            background-color: var(--bg-subtle);
            color: var(--primary);
        }

        .btn-subtle:hover {
            background-color: #E2E8F0;
            color: var(--accent-hover);
        }

        /* 顶部微信息条 */
        .top-bar {
            background-color: #081226;
            color: #8C9BB4;
            font-size: 0.8rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 8px 0;
        }

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

        .top-bar-links a {
            margin-left: 20px;
            color: #8C9BB4;
        }

        .top-bar-links a:hover {
            color: var(--accent);
        }

        /* 主导航条 */
        .site-header {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
            position: relative;
            z-index: 1000;
            transition: var(--transition);
        }

        .site-header.fixed-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background-color: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            box-shadow: 0 4px 16px rgba(15, 32, 66, 0.08);
            animation: slideDown 0.3s ease-in-out;
        }

        @keyframes slideDown {
            from { transform: translateY(-100%); }
            to { transform: translateY(0); }
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
        }

        .nav-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-brand span {
            color: var(--accent);
        }

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

        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-dark);
            position: relative;
            padding: 8px 0;
        }

        .nav-link:hover, .nav-link.active {
            color: var(--accent);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--accent);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--primary);
            margin: 5px 0;
            transition: var(--transition);
        }

        /* Section 通用布局与背景交替 */
        .section-block {
            padding: 80px 0;
            position: relative;
        }

        .bg-light { background-color: var(--bg-light); }
        .bg-white { background-color: #FFFFFF; }
        .bg-subtle { background-color: var(--bg-subtle); }
        .bg-dark {
            background-color: var(--bg-dark);
            color: #FFFFFF;
        }

        /* 1. Hero 展台 */
        .hero-section {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 32, 66, 0.95) 0%, rgba(11, 19, 43, 0.92) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #FFFFFF;
            padding: 90px 0 100px;
            overflow: hidden;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 40px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 2.7rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-content h1 em {
            font-style: normal;
            color: var(--accent);
            text-shadow: 0 0 20px rgba(0, 210, 133, 0.4);
        }

        .hero-desc {
            font-size: 1.05rem;
            color: #CBD5E1;
            margin-bottom: 34px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            margin-bottom: 40px;
        }

        .hero-kpis {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 24px;
        }

        .kpi-item .num {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent);
            display: block;
            line-height: 1.2;
        }

        .kpi-item .label {
            font-size: 0.85rem;
            color: #94A3B8;
        }

        .hero-visual {
            position: relative;
            transform: perspective(1000px) rotateY(-4deg) rotateX(2deg);
            transition: var(--transition);
        }

        .hero-visual:hover {
            transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
        }

        .hero-stage-img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-dark);
            border: 2px solid rgba(255, 255, 255, 0.12);
            object-fit: cover;
            width: 100%;
            height: 480px;
        }

        .hero-floating-badge {
            position: absolute;
            bottom: -20px;
            left: -20px;
            background: rgba(15, 32, 66, 0.95);
            border: 1px solid var(--accent);
            padding: 16px 20px;
            border-radius: var(--radius-md);
            backdrop-filter: blur(8px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.3);
            max-width: 240px;
        }

        .hero-floating-badge .title {
            font-size: 0.9rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 4px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .hero-floating-badge .title::before {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            display: inline-block;
        }

        .hero-floating-badge .text {
            font-size: 0.8rem;
            color: #94A3B8;
            line-height: 1.5;
        }

        /* 闪购/专项工程冲刺条 (蓝图硬性组件) */
        .sprint-bar {
            background: linear-gradient(90deg, #0F2042 0%, #152E5E 100%);
            border-bottom: 2px solid var(--accent);
            padding: 22px 0;
            color: #FFFFFF;
        }

        .sprint-flex {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }

        .sprint-info {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .sprint-badge {
            background: #E11D48;
            color: #FFFFFF;
            font-size: 0.8rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.6; }
            100% { opacity: 1; }
        }

        .sprint-countdown {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: #CBD5E1;
        }

        .countdown-chip {
            background: rgba(0, 0, 0, 0.4);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 700;
            color: var(--accent);
            font-family: monospace;
            font-size: 1.1rem;
        }

        /* 2. 行业痛点与卡片 */
        .pain-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 48px;
            align-items: center;
        }

        .pain-statement h3 {
            font-size: 1.85rem;
            color: var(--primary);
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .pain-statement p {
            color: var(--text-gray);
            margin-bottom: 24px;
        }

        .pain-cards {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .pain-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-left: 5px solid #EF4444;
            padding: 22px 24px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-subtle);
            transition: var(--transition);
        }

        .pain-card:hover {
            transform: translateX(6px);
            box-shadow: 0 8px 24px rgba(239, 68, 68, 0.1);
        }

        .pain-card-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 8px;
        }

        .pain-card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
        }

        .pain-tag {
            font-size: 0.75rem;
            background: #FEE2E2;
            color: #B91C1C;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
        }

        .pain-card-desc {
            font-size: 0.92rem;
            color: var(--text-gray);
            line-height: 1.65;
        }

        /* 3. 全栈解决方案 */
        .solution-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .solution-img-box {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-subtle);
        }

        .solution-img-box img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .solution-metric-tag {
            position: absolute;
            bottom: 24px;
            right: 24px;
            background: rgba(15, 32, 66, 0.95);
            color: #FFFFFF;
            padding: 16px 20px;
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .solution-metric-tag .val {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent);
        }

        .solution-metric-tag .lbl {
            font-size: 0.8rem;
            color: #94A3B8;
        }

        .solution-points {
            margin-top: 28px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .solution-point-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
        }

        .point-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(0, 210, 133, 0.15);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .point-text h4 {
            font-size: 1.05rem;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .point-text p {
            font-size: 0.9rem;
            color: var(--text-gray);
        }

        /* 4. 核心研发优势 (6卡网格) */
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .adv-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .adv-card:hover {
            transform: translateY(-6px);
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
        }

        .adv-icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(0, 210, 133, 0.1);
            color: var(--accent-hover);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .adv-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .adv-desc {
            font-size: 0.92rem;
            color: var(--text-gray);
            line-height: 1.65;
        }

        /* 5. 热门定制产品 (3大核心) */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .prod-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            box-shadow: var(--shadow-subtle);
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

        .prod-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--accent);
        }

        .prod-media {
            height: 210px;
            position: relative;
            overflow: hidden;
        }

        .prod-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .prod-tag-pill {
            position: absolute;
            top: 14px;
            right: 14px;
            background: rgba(15, 32, 66, 0.85);
            color: var(--accent);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 700;
            backdrop-filter: blur(4px);
        }

        .prod-body {
            padding: 26px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .prod-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .prod-desc {
            font-size: 0.92rem;
            color: var(--text-gray);
            margin-bottom: 20px;
            line-height: 1.6;
        }

        .prod-features {
            border-top: 1px dashed var(--border-color);
            padding-top: 16px;
            margin-top: auto;
            display: flex;
            flex-direction: column;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-dark);
        }

        .prod-feature-row {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .prod-feature-row::before {
            content: '✓';
            color: var(--accent);
            font-weight: 800;
        }

        /* 6. 全生命周期研发方法步骤 */
        .timeline-steps {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 16px;
            position: relative;
        }

        .timeline-steps::before {
            content: '';
            position: absolute;
            top: 36px;
            left: 5%;
            right: 5%;
            height: 2px;
            background: #CBD5E1;
            z-index: 1;
        }

        .step-node {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .step-circle {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: #FFFFFF;
            border: 3px solid var(--accent);
            color: var(--primary);
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 12px auto 18px;
            box-shadow: 0 0 0 6px var(--bg-light);
        }

        .step-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .step-desc {
            font-size: 0.8rem;
            color: var(--text-gray);
            line-height: 1.5;
            padding: 0 4px;
        }

        /* 7. 深色案例剖析 */
        .case-studies {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            margin-top: 40px;
        }

        .case-card {
            background: #111C3A;
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: 34px;
            box-shadow: var(--shadow-dark);
            position: relative;
            overflow: hidden;
        }

        .case-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--accent);
        }

        .case-header-row {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 16px;
        }

        .case-title {
            font-size: 1.35rem;
            font-weight: 700;
            color: #FFFFFF;
        }

        .case-badge {
            background: rgba(0, 210, 133, 0.15);
            color: var(--accent);
            font-size: 0.8rem;
            padding: 3px 10px;
            border-radius: 4px;
            font-weight: 600;
        }

        .case-desc {
            font-size: 0.92rem;
            color: #94A3B8;
            margin-bottom: 22px;
            line-height: 1.7;
        }

        .case-specs {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            background: rgba(0, 0, 0, 0.25);
            padding: 16px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.05);
        }

        .spec-item .num {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--accent);
            display: block;
        }

        .spec-item .lbl {
            font-size: 0.75rem;
            color: #64748B;
        }

        /* 8. 客户成果与故事 */
        .story-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            margin-bottom: 60px;
        }

        .story-row.reverse {
            direction: rtl;
        }

        .story-row.reverse .story-content {
            direction: ltr;
        }

        .story-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-subtle);
        }

        .story-img img {
            width: 100%;
            height: 380px;
            object-fit: cover;
        }

        .story-content h3 {
            font-size: 1.6rem;
            color: var(--primary);
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .story-content p {
            color: var(--text-gray);
            margin-bottom: 22px;
            line-height: 1.7;
        }

        .story-highlights {
            display: flex;
            gap: 24px;
        }

        .highlight-item {
            border-left: 3px solid var(--accent);
            padding-left: 12px;
        }

        .highlight-item .val {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            display: block;
        }

        .highlight-item .desc {
            font-size: 0.8rem;
            color: var(--text-gray);
        }

        /* 9. 关键交付成果数据统计条 */
        .metrics-strip {
            background: linear-gradient(135deg, var(--primary) 0%, #152E5E 100%);
            color: #FFFFFF;
            padding: 55px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .metric-col {
            border-right: 1px solid rgba(255, 255, 255, 0.1);
            padding: 0 16px;
        }

        .metric-col:last-child {
            border-right: none;
        }

        .metric-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: -1px;
        }

        .metric-label {
            font-size: 1rem;
            color: #E2E8F0;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .metric-sub {
            font-size: 0.8rem;
            color: #94A3B8;
        }

        /* 10. 客户评价墙 */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .testimonial-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 30px;
            box-shadow: var(--shadow-subtle);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .testi-stars {
            color: #F59E0B;
            font-size: 1.1rem;
            margin-bottom: 16px;
        }

        .testi-quote {
            font-size: 0.95rem;
            color: var(--text-dark);
            line-height: 1.7;
            margin-bottom: 24px;
            font-style: italic;
        }

        .testi-author {
            display: flex;
            align-items: center;
            gap: 14px;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
        }

        .testi-avatar {
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--bg-subtle);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            border: 2px solid var(--accent);
        }

        .testi-info h5 {
            font-size: 0.95rem;
            color: var(--primary);
            margin-bottom: 2px;
        }

        .testi-info span {
            font-size: 0.8rem;
            color: var(--text-gray);
        }

        /* 11. 资讯动态 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .news-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 26px;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-4px);
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
        }

        .news-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: var(--text-gray);
            margin-bottom: 14px;
        }

        .news-tag {
            color: var(--accent-hover);
            font-weight: 600;
            background: rgba(0, 210, 133, 0.1);
            padding: 2px 8px;
            border-radius: 4px;
        }

        .news-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.45;
            margin-bottom: 12px;
        }

        .news-excerpt {
            font-size: 0.9rem;
            color: var(--text-gray);
            line-height: 1.6;
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .news-action {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--accent-hover);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* 12. FAQ 手风琴 */
        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item.active {
            border-color: var(--accent);
            box-shadow: 0 4px 18px var(--accent-glow);
        }

        .faq-question {
            padding: 20px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            background: #FFFFFF;
            transition: var(--transition);
            user-select: none;
        }

        .faq-question:hover {
            color: var(--accent-hover);
        }

        .faq-toggle-icon {
            font-size: 1.2rem;
            color: var(--accent);
            transition: transform 0.25s ease;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease;
            background: #FAFCFE;
            font-size: 0.94rem;
            color: var(--text-gray);
            line-height: 1.7;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 220px;
            padding: 16px 24px 22px;
            border-top: 1px solid #F1F5F9;
        }

        /* 13. 底部咨询转化与表单 */
        .contact-wrap {
            background: linear-gradient(135deg, #0F2042 0%, #081226 100%);
            border-radius: var(--radius-lg);
            color: #FFFFFF;
            padding: 60px 50px;
            box-shadow: var(--shadow-dark);
            border: 1px solid var(--border-dark);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 48px;
            align-items: center;
        }

        .contact-text h3 {
            font-size: 2rem;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .contact-text h3 span {
            color: var(--accent);
        }

        .contact-text p {
            color: #94A3B8;
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .contact-commitments {
            display: flex;
            flex-direction: column;
            gap: 12px;
            font-size: 0.9rem;
            color: #CBD5E1;
        }

        .commit-row {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .commit-row::before {
            content: '●';
            color: var(--accent);
            font-size: 0.8rem;
        }

        .contact-form {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 34px;
            color: var(--text-dark);
        }

        .form-group {
            margin-bottom: 18px;
        }

        .form-label {
            display: block;
            font-size: 0.88rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .form-control {
            width: 100%;
            padding: 12px 14px;
            font-size: 0.92rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            outline: none;
            transition: var(--transition);
            font-family: inherit;
        }

        .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-glow);
        }

        .radio-options {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
        }

        .radio-box {
            position: relative;
        }

        .radio-box input {
            position: absolute;
            opacity: 0;
            cursor: pointer;
        }

        .radio-label {
            display: block;
            text-align: center;
            padding: 8px 6px;
            font-size: 0.82rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
        }

        .radio-box input:checked + .radio-label {
            border-color: var(--accent);
            background: rgba(0, 210, 133, 0.1);
            color: var(--primary);
            font-weight: 700;
        }

        .btn-submit {
            width: 100%;
            padding: 14px;
            font-size: 1rem;
            font-weight: 700;
            background: var(--accent);
            color: var(--primary);
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            margin-top: 6px;
        }

        .btn-submit:hover {
            background: var(--accent-hover);
            box-shadow: 0 6px 18px var(--accent-glow);
        }

        /* 页脚规范 */
        .site-footer {
            background: #091222;
            color: #8C9BB4;
            padding: 70px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 4fr 2fr 2fr 4fr;
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-brand-title {
            font-size: 1.3rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-brand-title span {
            color: var(--accent);
        }

        .footer-brand-desc {
            font-size: 0.88rem;
            line-height: 1.7;
            margin-bottom: 20px;
            color: #94A3B8;
        }

        .footer-col h4 {
            font-size: 1rem;
            color: #FFFFFF;
            margin-bottom: 18px;
            font-weight: 700;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

        .footer-contacts {
            display: flex;
            flex-direction: column;
            gap: 12px;
            font-size: 0.88rem;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 26px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: #64748B;
            flex-wrap: wrap;
            gap: 12px;
        }

        /* 响应式断点控制 */
        @media (max-width: 1024px) {
            .hero-grid, .pain-grid, .solution-split, .contact-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-visual {
                transform: none;
                order: -1;
            }
            .hero-stage-img {
                height: 380px;
            }
            .advantage-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline-steps {
                grid-template-columns: repeat(3, 1fr);
                gap: 30px;
            }
            .timeline-steps::before {
                display: none;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .section-block {
                padding: 50px 0;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .advantage-grid, .product-grid, .case-studies, .metrics-grid, .testimonials-grid, .news-grid {
                grid-template-columns: 1fr;
            }
            .metric-col {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                padding: 16px 0;
            }
            .metric-col:last-child {
                border-bottom: none;
            }
            .story-row, .story-row.reverse {
                grid-template-columns: 1fr;
                direction: ltr;
            }
            .timeline-steps {
                grid-template-columns: 1fr;
            }
            .nav-menu {
                position: fixed;
                top: 74px;
                left: 0;
                right: 0;
                background: #FFFFFF;
                flex-direction: column;
                padding: 24px;
                gap: 16px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                transform: translateY(-150%);
                opacity: 0;
                transition: var(--transition);
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-toggle {
                display: block;
            }
            .contact-wrap {
                padding: 30px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }