/* roulang page: index */
:root {
            --primary: #1A56DB;
            --primary-hover: #1545B3;
            --primary-light: #EBF5FF;
            --accent: #0E9F6E;
            --accent-hover: #057A55;
            --accent-light: #DEF7EC;
            --dark-navy: #0B192C;
            --dark-card: #13243B;
            --text-main: #111928;
            --text-body: #4B5563;
            --text-muted: #6B7280;
            --bg-page: #F9FAFB;
            --bg-white: #FFFFFF;
            --border-color: #E5E7EB;
            --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 20px -2px rgba(16, 24, 40, 0.06), 0 2px 6px -1px rgba(16, 24, 40, 0.03);
            --shadow-lg: 0 12px 32px -4px rgba(16, 24, 40, 0.12), 0 4px 12px -2px rgba(16, 24, 40, 0.06);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --container-max: 1240px;
            --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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-body);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* 顶部通告条 */
        .top-notice-bar {
            background-color: #F3F4F6;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.8125rem;
            color: var(--text-muted);
            padding: 0.45rem 0;
        }

        .top-notice-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .notice-tags {
            display: flex;
            align-items: center;
            gap: 1.25rem;
        }

        .notice-item {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

        .notice-dot {
            width: 7px;
            height: 7px;
            background-color: var(--accent);
            border-radius: 50%;
            display: inline-block;
        }

        /* 统一主导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 4.5rem;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.02em;
        }

        .logo-symbol {
            width: 2.5rem;
            height: 2.5rem;
            background: linear-gradient(135deg, var(--primary), #3F83F8);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            box-shadow: 0 4px 10px rgba(26, 86, 219, 0.3);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 1.75rem;
        }

        .nav-link {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-main);
            padding: 0.5rem 0.25rem;
            position: relative;
        }

        .nav-link:hover, .nav-link:focus {
            color: var(--primary);
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-action-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.65rem 1.4rem;
            background-color: var(--primary);
            color: #FFFFFF;
            font-size: 0.9375rem;
            font-weight: 600;
            border-radius: 9999px;
            box-shadow: 0 4px 12px rgba(26, 86, 219, 0.25);
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .nav-action-btn:hover {
            background-color: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(26, 86, 219, 0.35);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-main);
            cursor: pointer;
            padding: 0.5rem;
        }

        /* 移动端抽屉 */
        .mobile-drawer {
            position: fixed;
            top: 4.5rem;
            left: 0;
            width: 100%;
            height: calc(100vh - 4.5rem);
            background-color: #fff;
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
            transform: translateX(-100%);
            transition: transform 0.3s ease-in-out;
            z-index: 999;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }

        .mobile-drawer.active {
            transform: translateX(0);
        }

        .mobile-drawer .nav-link {
            font-size: 1.1rem;
            padding: 0.75rem 0;
            border-bottom: 1px solid var(--border-color);
            display: block;
        }

        /* 统一板块规范 */
        .section-block {
            padding-top: 5.5rem;
            padding-bottom: 5.5rem;
            position: relative;
        }

        .bg-white-block {
            background-color: var(--bg-white);
        }

        .bg-page-block {
            background-color: var(--bg-page);
        }

        .section-header {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 3.5rem auto;
        }

        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.35rem 0.9rem;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 0.8125rem;
            font-weight: 700;
            border-radius: 9999px;
            margin-bottom: 1rem;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 1.1rem;
        }

        .section-desc {
            font-size: 1.0625rem;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* 按钮与通用组件 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.85rem 1.75rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            cursor: pointer;
            border: 1px solid transparent;
            text-align: center;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.28);
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26, 86, 219, 0.36);
        }

        .btn-secondary {
            background-color: #fff;
            color: var(--primary);
            border-color: var(--border-color);
        }

        .btn-secondary:hover {
            background-color: var(--primary-light);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-accent {
            background-color: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(14, 159, 110, 0.28);
        }

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

        /* 板块一：#hero 首屏 */
        .hero-section {
            padding-top: 4.5rem;
            padding-bottom: 5.5rem;
            background: linear-gradient(180deg, #F9FAFB 0%, #EFF6FF 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-pattern-bg {
            position: absolute;
            inset: 0;
            background-image: radial-gradient(rgba(26, 86, 219, 0.08) 1px, transparent 1px);
            background-size: 24px 24px;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 3.5rem;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-content h1 {
            font-size: 2.85rem;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.25;
            letter-spacing: -0.03em;
            margin-bottom: 1.35rem;
        }

        .hero-content h1 span {
            color: var(--primary);
            display: inline-block;
        }

        .hero-lead {
            font-size: 1.125rem;
            color: var(--text-body);
            line-height: 1.75;
            margin-bottom: 2rem;
        }

        .hero-cta-group {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2.5rem;
        }

        .hero-badges-row {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid #E5E7EB;
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        .hero-badge-item {
            display: flex;
            align-items: center;
            gap: 0.45rem;
        }

        .hero-visual-card {
            background-color: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-lg);
            overflow: hidden;
            position: relative;
        }

        .hero-img-wrap {
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
            height: 320px;
        }

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

        .hero-img-wrap:hover img {
            transform: scale(1.03);
        }

        .hero-overlay-stats {
            padding: 1.25rem 1.5rem;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
            background: #fff;
        }

        .hero-stat-box {
            background: var(--bg-page);
            padding: 0.75rem 1rem;
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--primary);
        }

        .hero-stat-box.green {
            border-left-color: var(--accent);
        }

        .hero-stat-title {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-bottom: 0.2rem;
        }

        .hero-stat-val {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
        }

        /* 板块二：#about 架构体系与资质 */
        .about-layout {
            display: grid;
            grid-template-columns: 0.95fr 1.05fr;
            gap: 3.5rem;
            align-items: center;
        }

        .about-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }

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

        .about-chip-card {
            position: absolute;
            bottom: 1.5rem;
            right: 1.5rem;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(8px);
            padding: 1rem 1.35rem;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
            max-width: 240px;
        }

        .about-chip-card .chip-title {
            font-size: 0.8125rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.25rem;
        }

        .about-chip-card .chip-text {
            font-size: 0.75rem;
            color: var(--text-muted);
            line-height: 1.4;
        }

        .about-points-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            margin-top: 1.75rem;
        }

        .about-point-item {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
        }

        .point-icon-box {
            width: 2.75rem;
            height: 2.75rem;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-weight: 700;
        }

        .point-title {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 0.25rem;
        }

        .point-desc {
            font-size: 0.9375rem;
            color: var(--text-body);
            line-height: 1.6;
        }

        .qualifications-row {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-color);
        }

        .qual-badge {
            background-color: #F3F4F6;
            color: var(--text-main);
            padding: 0.35rem 0.85rem;
            font-size: 0.8125rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
        }

        /* 板块三：#advantages 6卡片核心优势 */
        .grid-3x2 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .feature-card {
            background: var(--bg-white);
            padding: 2.25rem 1.85rem;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

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

        .feature-icon {
            width: 3.25rem;
            height: 3.25rem;
            background: linear-gradient(135deg, var(--primary-light), #DBEAFE);
            color: var(--primary);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
        }

        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 0.75rem;
        }

        .feature-card p {
            font-size: 0.9375rem;
            color: var(--text-body);
            line-height: 1.65;
            flex-grow: 1;
        }

        .feature-tag-mini {
            display: inline-block;
            margin-top: 1.25rem;
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--accent);
        }

        /* 板块四：#products 3套专属配置包 */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            align-items: stretch;
        }

        .solution-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 2.5rem 2rem;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            position: relative;
        }

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

        .solution-card.featured {
            border: 2px solid var(--primary);
            box-shadow: var(--shadow-md);
        }

        .featured-ribbon {
            position: absolute;
            top: -12px;
            right: 24px;
            background: var(--primary);
            color: #fff;
            padding: 0.25rem 0.85rem;
            font-size: 0.75rem;
            font-weight: 700;
            border-radius: 9999px;
            letter-spacing: 0.05em;
        }

        .solution-header {
            margin-bottom: 1.75rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border-color);
        }

        .solution-header h3 {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 0.5rem;
        }

        .solution-header .suit-text {
            font-size: 0.875rem;
            color: var(--text-muted);
            min-height: 2.5rem;
        }

        .solution-features {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
            margin-bottom: 2.5rem;
            flex-grow: 1;
        }

        .solution-item {
            font-size: 0.9375rem;
            color: var(--text-body);
            display: flex;
            align-items: flex-start;
            gap: 0.65rem;
        }

        .solution-check {
            color: var(--accent);
            flex-shrink: 0;
            margin-top: 0.2rem;
        }

        /* 板块五：#architecture 深色对比理念与引擎架构 */
        .architecture-section {
            background-color: var(--dark-navy);
            color: #F3F4F6;
            padding-top: 6rem;
            padding-bottom: 6rem;
            position: relative;
            overflow: hidden;
        }

        .arch-mesh {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(to right, rgba(255,255,255,0.03) 1px, transparent 1px),
                              linear-gradient(to bottom, rgba(255,255,255,0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            opacity: 0.5;
        }

        .architecture-section .section-title {
            color: #FFFFFF;
        }

        .architecture-section .section-desc {
            color: #9CA3AF;
        }

        .arch-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            margin-top: 3.5rem;
            position: relative;
            z-index: 2;
        }

        .arch-node {
            background: var(--dark-card);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 2rem 1.5rem;
            border-radius: var(--radius-md);
            transition: var(--transition);
            position: relative;
        }

        .arch-node:hover {
            border-color: #3F83F8;
            transform: translateY(-3px);
        }

        .arch-step {
            font-size: 0.75rem;
            font-weight: 800;
            color: #60A5FA;
            margin-bottom: 0.5rem;
            text-transform: uppercase;
        }

        .arch-node h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 0.65rem;
        }

        .arch-node p {
            font-size: 0.875rem;
            color: #9CA3AF;
            line-height: 1.6;
        }

        /* 板块六：#scenarios 标杆场景与用户故事演示 */
        .scenarios-container {
            display: flex;
            flex-direction: column;
            gap: 3.5rem;
        }

        .scenario-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
        }

        .scenario-row.reverse {
            grid-template-columns: 1fr 1fr;
            direction: rtl;
        }

        .scenario-row.reverse > * {
            direction: ltr;
        }

        .scenario-img-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
            position: relative;
            height: 340px;
        }

        .scenario-img-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .scenario-badge {
            display: inline-block;
            background-color: var(--accent-light);
            color: var(--accent);
            font-size: 0.8125rem;
            font-weight: 700;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            margin-bottom: 0.85rem;
        }

        .scenario-text-content h3 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 1rem;
            line-height: 1.35;
        }

        .scenario-text-content p {
            font-size: 1rem;
            color: var(--text-body);
            line-height: 1.75;
            margin-bottom: 1.5rem;
        }

        .scenario-steps {
            display: flex;
            gap: 1rem;
        }

        .step-mini-pill {
            background-color: var(--bg-page);
            border: 1px solid var(--border-color);
            padding: 0.5rem 0.85rem;
            border-radius: var(--radius-sm);
            font-size: 0.8125rem;
            color: var(--text-main);
            font-weight: 600;
        }

        /* 板块七：#metrics 全局关键数据度量条 */
        .metrics-banner {
            background: linear-gradient(135deg, #1A56DB 0%, #113B99 100%);
            color: #FFFFFF;
            padding: 4.5rem 0;
            position: relative;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
        }

        .metric-item {
            padding: 0 1rem;
        }

        .metric-num {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.1;
            margin-bottom: 0.5rem;
            letter-spacing: -0.03em;
            color: #FFFFFF;
        }

        .metric-item:nth-child(2) .metric-num {
            color: #31C48D;
        }

        .metric-label {
            font-size: 1.05rem;
            font-weight: 600;
            color: #EBF5FF;
            margin-bottom: 0.35rem;
        }

        .metric-sub {
            font-size: 0.8125rem;
            color: #93C5FD;
        }

        /* 板块八：#testimonials 评价反馈 */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .testimonial-card {
            background-color: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 2.25rem 2rem;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

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

        .quote-icon {
            color: #BFDBFE;
            margin-bottom: 1rem;
        }

        .testimonial-text {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 1.75rem;
            flex-grow: 1;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 0.85rem;
            padding-top: 1.25rem;
            border-top: 1px solid var(--border-color);
        }

        .author-avatar-dummy {
            width: 2.75rem;
            height: 2.75rem;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.95rem;
        }

        .author-name {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-main);
        }

        .author-title {
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        /* 板块九：#news 动态快讯 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .news-card {
            background-color: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .news-img {
            height: 190px;
            overflow: hidden;
        }

        .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .news-body {
            padding: 1.75rem;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .news-meta {
            font-size: 0.8125rem;
            color: var(--text-muted);
            margin-bottom: 0.65rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .news-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 0.75rem;
            line-height: 1.45;
        }

        .news-summary {
            font-size: 0.875rem;
            color: var(--text-body);
            line-height: 1.65;
            margin-bottom: 1.5rem;
            flex-grow: 1;
        }

        .news-link {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

        /* 板块十：#faq 常见疑问与部署答疑 */
        .faq-wrapper {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

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

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

        .faq-question {
            width: 100%;
            text-align: left;
            background: none;
            border: none;
            padding: 1.35rem 1.75rem;
            font-size: 1.0625rem;
            font-weight: 700;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
        }

        .faq-icon-arrow {
            width: 1.25rem;
            height: 1.25rem;
            color: var(--text-muted);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 1.75rem;
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.75;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 1.5rem;
        }

        /* 板块十一：#guarantee 服务保障条 */
        .guarantee-bar {
            background-color: #F8FAFC;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            padding: 2.75rem 0;
        }

        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .guarantee-icon-box {
            width: 3rem;
            height: 3rem;
            border-radius: var(--radius-md);
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .guarantee-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 0.2rem;
        }

        .guarantee-desc {
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        /* 板块十二：#contact 留资咨询转化区 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 3.5rem;
            background-color: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-lg);
            overflow: hidden;
        }

        .contact-form-side {
            padding: 3.5rem 3rem;
        }

        .contact-form-side h3 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 0.65rem;
        }

        .contact-form-side p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.25rem;
            margin-bottom: 1.25rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.45rem;
        }

        .form-group.full {
            grid-column: span 2;
        }

        .form-label {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--text-main);
        }

        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.9375rem;
            color: var(--text-main);
            outline: none;
            transition: var(--transition);
            background-color: #FAFAFA;
        }

        .form-input:focus, .form-select:focus, .form-textarea:focus {
            border-color: var(--primary);
            background-color: #FFFFFF;
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.15);
        }

        .contact-info-side {
            background: linear-gradient(145deg, #1A56DB 0%, #0F3BA0 100%);
            color: #FFFFFF;
            padding: 3.5rem 2.5rem;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .info-top h4 {
            font-size: 1.35rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }

        .info-top p {
            font-size: 0.9375rem;
            color: #DBEAFE;
            line-height: 1.65;
            margin-bottom: 2rem;
        }

        .info-meta-list {
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }

        .info-meta-item {
            display: flex;
            align-items: flex-start;
            gap: 0.85rem;
            font-size: 0.9375rem;
            color: #EFF6FF;
        }

        .info-bottom-alert {
            padding: 1rem;
            background: rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            font-size: 0.8125rem;
            color: #BFDBFE;
            line-height: 1.5;
        }

        /* 浮动吸底行动转化条 (落地页蓝图规范要求) */
        .floating-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(10px);
            border-top: 1px solid var(--border-color);
            padding: 0.85rem 0;
            z-index: 900;
            box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.06);
            display: flex;
            align-items: center;
        }

        .floating-cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }

        .floating-text-group {
            display: flex;
            align-items: center;
            gap: 0.85rem;
        }

        .floating-tag {
            background-color: var(--accent-light);
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
        }

        .floating-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-main);
        }

        /* 统一页脚 */
        .site-footer {
            background-color: var(--dark-navy);
            color: #9CA3AF;
            padding-top: 5rem;
            padding-bottom: 5.5rem; /* 预留吸底bar高度 */
            font-size: 0.875rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
            gap: 3rem;
            margin-bottom: 3.5rem;
        }

        .footer-col h5 {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
        }

        .footer-logo-title {
            color: #FFFFFF;
            font-size: 1.35rem;
            font-weight: 800;
            margin-bottom: 0.85rem;
            display: flex;
            align-items: center;
            gap: 0.65rem;
        }

        .footer-about-text {
            line-height: 1.7;
            margin-bottom: 1.25rem;
            font-size: 0.875rem;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .footer-links a:hover {
            color: #FFFFFF;
            padding-left: 4px;
        }

        .footer-bottom {
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.8125rem;
        }

        .footer-bottom-links {
            display: flex;
            gap: 1.5rem;
        }

        /* 响应式断点控制 */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 3rem;
            }
            .about-layout {
                grid-template-columns: 1fr;
            }
            .grid-3x2, .pricing-grid, .testimonials-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .arch-grid, .guarantee-grid, .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .contact-layout {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu, .nav-action-btn {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .section-block {
                padding-top: 3.5rem;
                padding-bottom: 3.5rem;
            }
            .section-title {
                font-size: 1.75rem;
            }
            .hero-content h1 {
                font-size: 2.15rem;
            }
            .grid-3x2, .pricing-grid, .testimonials-grid, .news-grid, .arch-grid, .metrics-grid, .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .scenario-row, .scenario-row.reverse {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group.full {
                grid-column: span 1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .contact-form-side {
                padding: 2.25rem 1.5rem;
            }
            .contact-info-side {
                padding: 2.25rem 1.5rem;
            }
            .floating-text-group {
                display: none;
            }
            .floating-cta-inner {
                justify-content: center;
                width: 100%;
            }
            .floating-cta-inner .btn {
                width: 100%;
            }
        }