/* roulang page: index */
:root {
            --primary: #1D4ED8;
            --primary-hover: #1E40AF;
            --primary-light: #EFF6FF;
            --accent: #06B6D4;
            --accent-light: #ECFEFF;
            --success: #10B981;
            --dark: #0F172A;
            --dark-card: #1E293B;
            --slate-800: #1E293B;
            --slate-700: #334155;
            --slate-600: #475569;
            --slate-500: #64748B;
            --slate-400: #94A3B8;
            --slate-300: #CBD5E1;
            --slate-200: #E2E8F0;
            --slate-100: #F1F5F9;
            --slate-50: #F8FAFC;
            --white: #FFFFFF;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
            --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.03);
            --shadow-hover: 0 16px 28px -4px rgba(29, 78, 216, 0.12), 0 6px 10px -3px rgba(15, 23, 42, 0.04);
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
        }

        *, *::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: var(--white);
            color: var(--slate-700);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.25s ease;
        }

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

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* 顶部公用条 */
        .utility-bar {
            background-color: var(--dark);
            color: var(--slate-400);
            font-size: 13px;
            height: 38px;
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .utility-info span {
            display: inline-flex;
            align-items: center;
            margin-right: 20px;
        }

        .utility-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--success);
            margin-right: 8px;
            box-shadow: 0 0 6px var(--success);
        }

        .utility-links a {
            color: var(--slate-300);
            margin-left: 18px;
            font-size: 12px;
        }

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

        /* 主导航条 */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--slate-200);
            transition: all 0.3s ease;
        }

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

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-weight: 800;
            font-size: 18px;
            box-shadow: 0 4px 10px rgba(29, 78, 216, 0.25);
        }

        .brand-text-sub {
            font-size: 11px;
            color: var(--primary);
            letter-spacing: 0.5px;
            text-transform: uppercase;
            font-weight: 600;
            display: block;
            margin-top: -2px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 24px;
        }

        .nav-item a {
            font-size: 15px;
            font-weight: 500;
            color: var(--slate-700);
            padding: 8px 4px;
            position: relative;
        }

        .nav-item a:hover, .nav-item a.active {
            color: var(--primary);
        }

        .nav-item a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: width 0.2s ease;
        }

        .nav-item a:hover::after, .nav-item a.active::after {
            width: 100%;
        }

        .nav-action {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 20px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s ease;
            text-align: center;
            border: 1px solid transparent;
            min-height: 42px;
        }

        .btn-primary {
            background-color: var(--primary);
            color: var(--white);
            box-shadow: 0 4px 12px rgba(29, 78, 216, 0.2);
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(29, 78, 216, 0.3);
            color: var(--white);
        }

        .btn-outline {
            background-color: transparent;
            border-color: var(--slate-300);
            color: var(--slate-700);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background-color: var(--primary-light);
        }

        .btn-white {
            background-color: var(--white);
            color: var(--primary);
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        }

        .btn-white:hover {
            background-color: var(--slate-50);
            transform: translateY(-2px);
        }

        /* 移动端汉堡切换 */
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .mobile-toggle span {
            width: 22px;
            height: 2px;
            background-color: var(--dark);
            transition: all 0.3s ease;
        }

        /* Section 公共结构 */
        section {
            padding: 80px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            max-width: 820px;
            margin: 0 auto 50px auto;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background-color: var(--primary-light);
            padding: 4px 14px;
            border-radius: 30px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.35;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--slate-600);
            line-height: 1.7;
        }

        /* 板块 1: Hero 蓝图前后对比首屏 */
        .hero-section {
            position: relative;
            background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
            padding: 60px 0 90px 0;
            overflow: hidden;
        }

        .hero-bg-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/d2fa5a6cc1a6d67e.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.05;
            pointer-events: none;
        }

        .hero-head {
            text-align: center;
            max-width: 960px;
            margin: 0 auto 40px auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--accent-light);
            border: 1px solid rgba(6, 182, 212, 0.25);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            color: #0891B2;
            margin-bottom: 18px;
        }

        .hero-h1 {
            font-size: 42px;
            font-weight: 900;
            color: var(--dark);
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-h1 span {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-subtext {
            font-size: 17px;
            color: var(--slate-600);
            line-height: 1.75;
            max-width: 820px;
            margin: 0 auto 30px auto;
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 50px;
        }

        /* Hero 对比看板 (Before / After 并置) */
        .hero-comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            position: relative;
        }

        .comparison-col {
            border-radius: var(--radius-lg);
            padding: 32px;
            position: relative;
            transition: all 0.3s ease;
        }

        .col-before {
            background-color: var(--slate-50);
            border: 1px dashed var(--slate-300);
        }

        .col-after {
            background-color: var(--white);
            border: 1px solid rgba(29, 78, 216, 0.25);
            box-shadow: var(--shadow-hover);
        }

        .comp-badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 6px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .badge-before {
            background-color: #FEE2E2;
            color: #DC2626;
        }

        .badge-after {
            background-color: #DCFCE7;
            color: #15803D;
        }

        .comp-col-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
        }

        .comp-item-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-top: 16px;
        }

        .comp-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 14px;
            color: var(--slate-600);
            line-height: 1.6;
        }

        .comp-icon-neg {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background-color: #FEE2E2;
            color: #DC2626;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .comp-icon-pos {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background-color: #DCFCE7;
            color: #16A34A;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .audio-wave-demo {
            margin-top: 24px;
            padding: 16px;
            background: var(--slate-900);
            border-radius: var(--radius-md);
            color: var(--white);
            font-family: monospace;
            font-size: 13px;
        }

        .wave-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 10px;
            color: var(--slate-400);
        }

        .wave-status {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-size: 12px;
        }

        .wave-pulse {
            width: 8px;
            height: 8px;
            background-color: var(--accent);
            border-radius: 50%;
            animation: pulse 1.5s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(0.9); opacity: 0.7; }
            50% { transform: scale(1.3); opacity: 1; }
            100% { transform: scale(0.9); opacity: 0.7; }
        }

        .wave-transcription {
            color: #E2E8F0;
            border-left: 2px solid var(--accent);
            padding-left: 10px;
            line-height: 1.6;
        }

        /* 板块 2: 品类入口墙 */
        .category-section {
            background-color: var(--white);
            border-top: 1px solid var(--slate-100);
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .category-card {
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-md);
            padding: 24px;
            background-color: var(--slate-50);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .category-card:hover {
            border-color: var(--primary);
            background-color: var(--white);
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .cat-icon-wrap {
            width: 44px;
            height: 44px;
            border-radius: 8px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cat-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
        }

        .cat-desc {
            font-size: 14px;
            color: var(--slate-600);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .cat-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* 板块 3: 核心卖点三连 */
        .features-section {
            background-color: var(--slate-50);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-box {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }

        .feature-box:hover {
            border-color: rgba(29, 78, 216, 0.3);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .feat-badge {
            display: inline-block;
            font-size: 11px;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 10px;
            border-radius: 4px;
            margin-bottom: 16px;
        }

        .feat-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
        }

        .feat-desc {
            font-size: 14px;
            color: var(--slate-600);
            line-height: 1.65;
            margin-bottom: 20px;
        }

        .feat-metrics-tag {
            border-top: 1px solid var(--slate-100);
            padding-top: 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--slate-500);
        }

        .feat-val {
            font-weight: 700;
            color: var(--success);
            font-size: 16px;
        }

        /* 板块 4: 场景演示 */
        .solutions-section {
            background-color: var(--white);
        }

        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .solution-card {
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--white);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }

        .solution-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .sol-img-wrap {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

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

        .solution-card:hover .sol-img-wrap img {
            transform: scale(1.05);
        }

        .sol-tag-overlay {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(4px);
            color: var(--white);
            font-size: 11px;
            padding: 4px 10px;
            border-radius: 4px;
        }

        .sol-body {
            padding: 24px;
        }

        .sol-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .sol-desc {
            font-size: 14px;
            color: var(--slate-600);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .sol-specs {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            border-top: 1px solid var(--slate-100);
            padding-top: 14px;
        }

        .sol-spec-item {
            font-size: 12px;
            background: var(--slate-100);
            color: var(--slate-600);
            padding: 3px 8px;
            border-radius: 4px;
        }

        /* 板块 5: 关键数据指标 */
        .metrics-section {
            background-color: #0F172A;
            color: var(--white);
            padding: 60px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

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

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

        .metric-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 8px;
            font-variant-numeric: tabular-nums;
        }

        .metric-label {
            font-size: 15px;
            font-weight: 600;
            color: #E2E8F0;
            margin-bottom: 4px;
        }

        .metric-sub {
            font-size: 12px;
            color: var(--slate-400);
        }

        /* 板块 6: 工业级声学架构链路 */
        .architecture-section {
            background: #0B1120;
            color: var(--white);
        }

        .architecture-section .section-title {
            color: var(--white);
        }

        .architecture-section .section-desc {
            color: var(--slate-400);
        }

        .arch-pipeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            position: relative;
            margin-top: 40px;
        }

        .arch-step {
            background: #1E293B;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 24px;
            position: relative;
        }

        .arch-step-num {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            background: rgba(6, 182, 212, 0.15);
            color: var(--accent);
            padding: 2px 8px;
            border-radius: 4px;
            margin-bottom: 12px;
        }

        .arch-step-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 10px;
        }

        .arch-step-desc {
            font-size: 13px;
            color: var(--slate-400);
            line-height: 1.6;
        }

        /* 板块 7: 对比选型矩阵 */
        .comparison-section {
            background-color: var(--white);
        }

        .table-responsive {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            border: 1px solid var(--slate-200);
            box-shadow: var(--shadow-sm);
        }

        .comp-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 14px;
        }

        .comp-table th, .comp-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--slate-200);
        }

        .comp-table th {
            background-color: var(--slate-50);
            color: var(--dark);
            font-weight: 700;
        }

        .comp-table th.col-highlight {
            background-color: var(--primary-light);
            color: var(--primary);
            border-top: 3px solid var(--primary);
        }

        .comp-table td.col-highlight {
            background-color: #F8FAFF;
            font-weight: 600;
            color: var(--dark);
        }

        /* 板块 8: 口碑榜与客户原声 */
        .testimonials-section {
            background-color: var(--slate-50);
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .testimonial-card {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .testi-stars {
            color: #F59E0B;
            font-size: 14px;
            margin-bottom: 14px;
            letter-spacing: 2px;
        }

        .testi-quote {
            font-size: 14px;
            color: var(--slate-700);
            line-height: 1.7;
            margin-bottom: 20px;
            font-style: italic;
        }

        .testi-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--slate-100);
            padding-top: 16px;
        }

        .author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--slate-200);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--slate-600);
        }

        .author-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--dark);
        }

        .author-role {
            font-size: 12px;
            color: var(--slate-500);
        }

        /* 板块 9: 典型落地案例深剖 */
        .casestudy-section {
            background-color: var(--white);
        }

        .case-card-dual {
            display: grid;
            grid-template-columns: 1fr 1fr;
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .case-img-side {
            background-color: var(--slate-100);
            overflow: hidden;
            min-height: 380px;
        }

        .case-img-side img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-info-side {
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .case-badge {
            align-self: flex-start;
            font-size: 12px;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 10px;
            border-radius: 4px;
            margin-bottom: 14px;
        }

        .case-title {
            font-size: 24px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .case-p {
            font-size: 14px;
            color: var(--slate-600);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .case-data-row {
            display: flex;
            gap: 24px;
            border-top: 1px solid var(--slate-100);
            padding-top: 20px;
        }

        .case-stat-num {
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
        }

        .case-stat-desc {
            font-size: 12px;
            color: var(--slate-500);
        }

        /* 板块 10: 资讯与技术前沿动态 */
        .news-section {
            background-color: var(--slate-50);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-card {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all 0.3s ease;
        }

        .news-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .news-meta {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            color: var(--slate-400);
            margin-bottom: 12px;
        }

        .news-tag {
            color: var(--primary);
            font-weight: 600;
        }

        .news-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
            line-height: 1.5;
        }

        .news-summary {
            font-size: 13px;
            color: var(--slate-600);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .news-action {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* 板块 11: 异议拆解 FAQ */
        .faq-section {
            background-color: var(--white);
        }

        .faq-accordion {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.25s ease;
        }

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

        .faq-question {
            padding: 20px 24px;
            background: var(--white);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            user-select: none;
        }

        .faq-arrow {
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease;
            font-size: 12px;
            color: var(--slate-400);
        }

        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            background: var(--slate-50);
            font-size: 14px;
            color: var(--slate-600);
            line-height: 1.7;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 16px 24px 20px 24px;
            border-top: 1px solid var(--slate-100);
        }

        /* 板块 12: 资质与保障承诺 */
        .compliance-section {
            background-color: var(--slate-50);
            border-top: 1px solid var(--slate-200);
            padding: 60px 0;
        }

        .compliance-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .comp-card {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-md);
            padding: 20px;
            text-align: center;
        }

        .comp-icon {
            font-size: 26px;
            margin-bottom: 10px;
        }

        .comp-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 6px;
        }

        .comp-desc {
            font-size: 12px;
            color: var(--slate-500);
            line-height: 1.5;
        }

        /* 板块 13: 预约咨询与私有化测试表单 */
        .contact-section {
            background-color: var(--white);
        }

        .contact-box {
            display: grid;
            grid-template-columns: 5fr 7fr;
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .contact-info-panel {
            background: linear-gradient(135deg, var(--dark) 0%, #1E293B 100%);
            color: var(--white);
            padding: 48px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .cip-title {
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cip-desc {
            font-size: 14px;
            color: var(--slate-300);
            line-height: 1.7;
            margin-bottom: 30px;
        }

        .cip-meta-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 20px;
            font-size: 14px;
            color: var(--slate-300);
        }

        .cip-meta-icon {
            color: var(--accent);
            font-size: 16px;
            margin-top: 2px;
        }

        .contact-form-panel {
            padding: 48px;
            background: var(--white);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 16px;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 6px;
        }

        .form-control {
            width: 100%;
            height: 44px;
            border: 1px solid var(--slate-300);
            border-radius: 6px;
            padding: 0 14px;
            font-size: 14px;
            color: var(--dark);
            background: var(--white);
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.15);
        }

        select.form-control {
            cursor: pointer;
        }

        textarea.form-control {
            height: 90px;
            padding: 10px 14px;
            resize: vertical;
        }

        /* 强转化收口条 */
        .cta-bottom-bar {
            background: linear-gradient(135deg, var(--primary) 0%, #2563EB 100%);
            color: var(--white);
            padding: 50px 0;
            text-align: center;
        }

        .cta-bar-title {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-bar-sub {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 24px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 底部系统 */
        .main-footer {
            background-color: var(--dark);
            color: var(--slate-400);
            padding: 70px 0 30px 0;
            font-size: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-brand-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 14px;
        }

        .footer-brand-desc {
            font-size: 13px;
            line-height: 1.7;
            color: var(--slate-400);
            margin-bottom: 20px;
        }

        .footer-col-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
        }

        .footer-bottom a {
            color: var(--slate-400);
        }

        .footer-bottom a:hover {
            color: var(--white);
        }

        /* 响应式样式适配 */
        @media (max-width: 1024px) {
            .hero-comparison-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-grid, .solutions-grid, .testimonials-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-grid, .compliance-grid, .arch-pipeline {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .metric-item {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .case-card-dual {
                grid-template-columns: 1fr;
            }
            .case-img-side {
                min-height: 260px;
            }
        }

        @media (max-width: 768px) {
            .utility-bar {
                display: none;
            }
            .nav-menu, .nav-action .btn-outline {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .hero-h1 {
                font-size: 30px;
            }
            .section-title {
                font-size: 26px;
            }
            .category-grid, .features-grid, .solutions-grid, .testimonials-grid, .news-grid, .compliance-grid, .arch-pipeline {
                grid-template-columns: 1fr;
            }
            .contact-box {
                grid-template-columns: 1fr;
            }
            .contact-info-panel, .contact-form-panel {
                padding: 30px 20px;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
            /* 移动端菜单抽屉 */
            .nav-menu.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--white);
                padding: 20px;
                border-bottom: 1px solid var(--slate-200);
                box-shadow: var(--shadow-lg);;
            }
        }