/* roulang page: index */
:root {
            --color-primary: #0f172a;
            --color-primary-dark: #0a0f1d;
            --color-accent: #0284c7;
            --color-accent-purple: #6366f1;
            --color-gradient: linear-gradient(135deg, #0284c7 0%, #6366f1 100%);
            --color-gradient-subtle: linear-gradient(180deg, #f0f7ff 0%, #f8fafc 100%);
            --color-warning: #f59e0b;
            --color-success: #10b981;
            --color-text-main: #1e293b;
            --color-text-muted: #64748b;
            --color-bg-light: #f8fafc;
            --color-bg-white: #ffffff;
            --color-border: #e2e8f0;
            --color-border-card: #e5e7eb;
            --radius-md: 12px;
            --radius-card: 20px;
            --radius-badge: 9999px;
            --shadow-subtle: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
            --shadow-card: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
            --shadow-hover: 0 20px 30px -10px rgba(2, 132, 199, 0.15), 0 10px 15px -3px rgba(15, 23, 42, 0.08);
            --transition-smooth: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--color-bg-light);
            color: var(--color-text-main);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
        }

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

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

        button, input, select, textarea {
            font-family: inherit;
            font-size: 1rem;
        }

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

        /* 顶部导航体系 */
        .top-bar {
            background-color: var(--color-primary-dark);
            color: #94a3b8;
            font-size: 13px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 8px 0;
        }

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

        .top-bar-indicator {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

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

        .top-bar-contact {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 22px;
            font-weight: 700;
            color: var(--color-primary);
        }

        .brand-icon-box {
            width: 42px;
            height: 42px;
            background: var(--color-gradient);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            box-shadow: 0 4px 10px rgba(2, 132, 199, 0.3);
        }

        .brand-icon-box svg {
            width: 24px;
            height: 24px;
            fill: none;
            stroke: currentColor;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: #475569;
            position: relative;
            padding: 6px 0;
        }

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

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

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

        .header-cta {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-badge);
            transition: var(--transition-smooth);
            cursor: pointer;
            border: none;
            outline: none;
            gap: 8px;
        }

        .btn:focus-visible {
            box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.4);
        }

        .btn-primary {
            background: var(--color-gradient);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 20px rgba(99, 102, 241, 0.45);
        }

        .btn-secondary {
            background: #f1f5f9;
            color: var(--color-primary);
            border: 1px solid var(--color-border);
        }

        .btn-secondary:hover {
            background: #e2e8f0;
            transform: translateY(-2px);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            color: var(--color-primary);
        }

        .mobile-menu {
            display: none;
            background: #ffffff;
            border-bottom: 1px solid var(--color-border);
            padding: 20px 24px;
        }

        .mobile-menu.show {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        /* 徽章 Badge */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            background: rgba(2, 132, 199, 0.08);
            border: 1px solid rgba(2, 132, 199, 0.2);
            color: var(--color-accent);
            border-radius: var(--radius-badge);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.2px;
        }

        .badge-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: currentColor;
        }

        /* 基础区块结构 */
        .section-block {
            padding: 88px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            max-width: 820px;
            margin: 0 auto 56px auto;
        }

        .section-title {
            font-size: 34px;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.35;
            margin-top: 14px;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* 1. 首屏指标看板 Hero Dashboard */
        .hero-section {
            background: radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 60%),
                        linear-gradient(180deg, #f0f7ff 0%, #ffffff 100%);
            padding: 60px 0 80px 0;
            position: relative;
            overflow: hidden;
        }

        .hero-banner-bg {
            position: absolute;
            inset: 0;
            opacity: 0.04;
            background-image: url('/assets/images/837b64addb9b478e.jpg');
            background-size: cover;
            background-position: center;
            pointer-events: none;
        }

        .hero-container {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-content h1 {
            font-size: 44px;
            font-weight: 900;
            color: var(--color-primary);
            line-height: 1.25;
            margin-top: 18px;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero-content h1 span {
            background: var(--color-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-description {
            font-size: 17px;
            color: #475569;
            line-height: 1.75;
            margin-bottom: 32px;
        }

        .hero-action-group {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 40px;
        }

        .hero-media-wrapper {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.8);
            background: #ffffff;
        }

        .hero-media-wrapper img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .hero-metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
            margin-top: 50px;
            position: relative;
            z-index: 2;
        }

        .metric-card {
            background: #ffffff;
            border-radius: var(--radius-card);
            padding: 24px;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            text-align: center;
        }

        .metric-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(99, 102, 241, 0.3);
        }

        .metric-value {
            font-size: 32px;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.1;
            margin-bottom: 8px;
            font-family: inherit;
        }

        .metric-label {
            font-size: 14px;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* 2. 品牌与技术架构区 (Intro & Tech Matrix) */
        .tech-section {
            background-color: #ffffff;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .tech-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .tech-text-block h3 {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 20px;
            line-height: 1.35;
        }

        .tech-text-block p {
            font-size: 16px;
            color: #475569;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .param-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 16px;
            background: var(--color-bg-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border);
        }

        .param-table td {
            padding: 12px 18px;
            font-size: 14px;
            border-bottom: 1px solid var(--color-border);
        }

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

        .param-label {
            color: var(--color-text-muted);
            font-weight: 600;
            width: 38%;
        }

        .param-value {
            color: var(--color-primary);
            font-weight: 600;
        }

        .tech-visual-card {
            background: linear-gradient(145deg, #0f172a 0%, #1e293b 100%);
            border-radius: var(--radius-card);
            padding: 32px;
            color: #ffffff;
            box-shadow: 0 16px 36px rgba(15, 23, 42, 0.2);
            position: relative;
            overflow: hidden;
        }

        .arch-layer {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 12px;
            padding: 16px 20px;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .arch-layer:last-child {
            margin-bottom: 0;
        }

        .arch-layer-name {
            font-weight: 700;
            font-size: 15px;
            color: #e2e8f0;
        }

        .arch-layer-tech {
            font-size: 13px;
            color: #38bdf8;
            font-family: monospace;
        }

        /* 3. 核心优势六卡片区 (Core Strengths) */
        .strengths-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

        .strength-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--color-gradient);
            opacity: 0;
            transition: var(--transition-smooth);
        }

        .strength-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(99, 102, 241, 0.3);
        }

        .strength-card:hover::before {
            opacity: 1;
        }

        .strength-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(2, 132, 199, 0.08);
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 22px;
        }

        .strength-icon svg {
            width: 28px;
            height: 28px;
            stroke-width: 2;
        }

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

        .strength-desc {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.65;
        }

        /* 4. 热门产品体系区 (Hot Products - 3卡片) */
        .product-section {
            background: #ffffff;
            border-top: 1px solid var(--color-border);
        }

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

        .product-card {
            background: #ffffff;
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            padding: 40px 32px;
            display: flex;
            flex-direction: column;
            position: relative;
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
        }

        .product-card.featured {
            border: 2px solid var(--color-accent);
            background: linear-gradient(180deg, rgba(2, 132, 199, 0.02) 0%, #ffffff 100%);
            box-shadow: 0 16px 36px rgba(2, 132, 199, 0.12);
        }

        .product-card:hover {
            transform: translateY(-6px);
        }

        .product-badge-top {
            position: absolute;
            top: -14px;
            right: 28px;
            background: var(--color-gradient);
            color: #ffffff;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: var(--radius-badge);
        }

        .product-title {
            font-size: 24px;
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 10px;
        }

        .product-tagline {
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 24px;
        }

        .product-features-list {
            list-style: none;
            margin: 20px 0 32px 0;
            flex-grow: 1;
        }

        .product-features-list li {
            font-size: 15px;
            color: #334155;
            margin-bottom: 14px;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.5;
        }

        .product-features-list svg {
            width: 18px;
            height: 18px;
            color: var(--color-success);
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* 5. 深色对比与检测结果看板 (Dark Comparison) */
        .dark-comparison-section {
            background-color: var(--color-primary-dark);
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

        .comparison-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .comparison-box {
            border-radius: var(--radius-card);
            padding: 36px;
            backdrop-filter: blur(8px);
        }

        .box-manual {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .box-ai {
            background: linear-gradient(145deg, rgba(2, 132, 199, 0.15) 0%, rgba(99, 102, 241, 0.12) 100%);
            border: 1px solid rgba(56, 189, 248, 0.4);
            box-shadow: 0 0 30px rgba(2, 132, 199, 0.15);
        }

        .comp-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .comp-title {
            font-size: 20px;
            font-weight: 700;
        }

        .comp-row {
            margin-bottom: 20px;
        }

        .comp-label {
            font-size: 13px;
            color: #94a3b8;
            margin-bottom: 6px;
            display: flex;
            justify-content: space-between;
        }

        .progress-bar-bg {
            height: 10px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.1);
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            border-radius: 999px;
        }

        .fill-manual {
            background: #64748b;
        }

        .fill-ai {
            background: var(--color-gradient);
        }

        /* 6. 行业方案与用户故事 (Industry Stories) */
        .stories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

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

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

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

        .story-body {
            padding: 28px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .story-sector {
            font-size: 13px;
            font-weight: 700;
            color: var(--color-accent);
            margin-bottom: 8px;
            text-transform: uppercase;
        }

        .story-heading {
            font-size: 19px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .story-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.65;
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .story-result-tag {
            background: #ecfdf5;
            color: #065f46;
            border: 1px solid #a7f3d0;
            padding: 8px 12px;
            border-radius: 8px;
            font-size: 13px;
            font-weight: 600;
        }

        /* 7. 平台保障与合规资质 (Platform Security) */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .security-item {
            background: #ffffff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 24px;
            text-align: center;
            box-shadow: var(--shadow-subtle);
        }

        .security-icon {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px auto;
            border-radius: 12px;
            background: rgba(2, 132, 199, 0.08);
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .security-icon svg {
            width: 24px;
            height: 24px;
        }

        .security-name {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        .security-desc {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* 8. 关键数据统计条 (Milestone Counters) */
        .milestone-strip-section {
            background: var(--color-gradient);
            padding: 64px 0;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

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

        .milestone-box {
            padding: 20px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-card);
            backdrop-filter: blur(8px);
        }

        .milestone-number {
            font-size: 38px;
            font-weight: 900;
            margin-bottom: 8px;
            line-height: 1;
        }

        .milestone-text {
            font-size: 14px;
            opacity: 0.9;
            font-weight: 500;
        }

        /* 9. 服务流程与对抗里程碑 (Detection Milestones) */
        .timeline-section {
            background: #ffffff;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .timeline-steps {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }

        .timeline-step {
            position: relative;
            background: var(--color-bg-light);
            border-radius: var(--radius-card);
            padding: 28px 20px;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-subtle);
        }

        .step-num {
            width: 36px;
            height: 36px;
            background: var(--color-gradient);
            color: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 14px;
            margin-bottom: 16px;
        }

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

        .step-desc {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* 10. 用户真实评价区 (Testimonials) */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .testimonial-card {
            background: #ffffff;
            border-radius: var(--radius-card);
            padding: 36px 30px;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-subtle);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .quote-icon {
            font-size: 32px;
            color: var(--color-accent);
            opacity: 0.3;
            line-height: 1;
            margin-bottom: 16px;
        }

        .testimonial-text {
            font-size: 15px;
            color: #334155;
            line-height: 1.7;
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .author-info {
            display: flex;
            align-items: center;
            gap: 14px;
            border-top: 1px solid var(--color-border);
            padding-top: 18px;
        }

        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            font-weight: 700;
            font-size: 15px;
        }

        .author-meta h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-primary);
        }

        .author-meta p {
            font-size: 13px;
            color: var(--color-text-muted);
        }

        /* 11. 知识产权保护动态区 (Embedded News Cards) */
        .news-section {
            background: #ffffff;
            border-top: 1px solid var(--color-border);
        }

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

        .news-card {
            background: var(--color-bg-light);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition-smooth);
        }

        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: rgba(99, 102, 241, 0.3);
        }

        .news-body {
            padding: 28px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .news-date {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 10px;
        }

        .news-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.45;
            margin-bottom: 12px;
        }

        .news-summary {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.65;
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .news-link-btn {
            display: inline-flex;
            align-items: center;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-accent);
            gap: 6px;
        }

        /* 12. 快速解答与手风琴常见问题区 (FAQ Accordion) */
        .faq-accordion-list {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: #ffffff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-subtle);
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .faq-item[open] {
            border-color: rgba(2, 132, 199, 0.4);
            box-shadow: var(--shadow-card);
        }

        .faq-item summary {
            padding: 22px 28px;
            font-size: 17px;
            font-weight: 700;
            color: var(--color-primary);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-chevron {
            width: 20px;
            height: 20px;
            transition: transform 0.25s ease;
        }

        .faq-item[open] .faq-chevron {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 28px 24px 28px;
            font-size: 15px;
            color: #475569;
            line-height: 1.75;
            border-top: 1px dashed #f1f5f9;
            padding-top: 18px;
        }

        /* 13. 终极转化与试用申请表单区 (Conversion Form CTA) */
        .conversion-section {
            background: linear-gradient(135deg, #0a0f1d 0%, #1e293b 100%);
            color: #ffffff;
            padding: 88px 0;
            position: relative;
        }

        .conversion-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .conversion-text h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 20px;
        }

        .conversion-text p {
            font-size: 16px;
            color: #94a3b8;
            line-height: 1.75;
            margin-bottom: 32px;
        }

        .conversion-checklist {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .conversion-checklist li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 15px;
            color: #cbd5e1;
        }

        .conversion-form-card {
            background: #ffffff;
            border-radius: var(--radius-card);
            padding: 40px;
            color: var(--color-primary);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 8px;
            color: #334155;
        }

        .form-input, .form-select {
            width: 100%;
            padding: 13px 16px;
            border-radius: 10px;
            border: 1px solid var(--color-border);
            outline: none;
            font-size: 14px;
            color: #1e293b;
            background: #f8fafc;
            transition: var(--transition-smooth);
        }

        .form-input:focus-visible, .form-select:focus-visible {
            border-color: var(--color-accent);
            background: #ffffff;
            box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.2);
        }

        .form-submit-btn {
            width: 100%;
            padding: 15px;
            font-size: 16px;
            border-radius: 10px;
            margin-top: 10px;
        }

        /* 统一页脚 Footer */
        .site-footer {
            background-color: var(--color-primary-dark);
            color: #94a3b8;
            padding: 70px 0 30px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brief {
            line-height: 1.7;
            margin-bottom: 20px;
            color: #94a3b8;
        }

        .footer-col-title {
            font-size: 15px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 20px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a:hover {
            color: #38bdf8;
        }

        .footer-bottom {
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            font-size: 13px;
            color: #64748b;
            display: flex;
            flex-direction: column;
            gap: 10px;
            align-items: center;
        }

        .footer-bottom a {
            color: #64748b;
        }

        .footer-bottom a:hover {
            color: #cbd5e1;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-container, .tech-grid, .comparison-layout, .conversion-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .strengths-grid, .product-grid, .stories-grid, .testimonials-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-metrics-grid, .security-grid, .milestone-strip-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline-steps {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .desktop-nav, .header-cta {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .top-bar-contact {
                display: none;
            }
            .hero-content h1 {
                font-size: 32px;
            }
            .section-title {
                font-size: 26px;
            }
            .strengths-grid, .product-grid, .stories-grid, .testimonials-grid, .news-grid, .hero-metrics-grid, .security-grid, .milestone-strip-grid {
                grid-template-columns: 1fr;
            }
            .conversion-form-card {
                padding: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }