/* roulang page: index */
:root {
            --primary: #0A2540;
            --primary-light: #16385C;
            --accent: #00D4B2;
            --accent-hover: #00B89B;
            --accent-blue: #2563EB;
            --dark: #0F172A;
            --dark-deep: #030712;
            --text-main: #334155;
            --text-muted: #64748B;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --border-color: rgba(226, 232, 240, 0.8);
            --border-dark: rgba(255, 255, 255, 0.1);
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 5px 10px rgba(0,0,0,0.02);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.06), 0 10px 15px -5px rgba(0,0,0,0.04);
            --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.03);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --transition: cubic-bezier(0.4, 0, 0.2, 1) 0.3s;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.75;
        }

        body {
            overflow-x: hidden;
        }

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

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

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部通告与导航 */
        .top-bar {
            background-color: var(--dark-deep);
            color: #94A3B8;
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid var(--border-dark);
        }
        .top-bar-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-bar-left span {
            margin-right: 20px;
        }
        .top-bar-badge {
            background: rgba(0, 212, 178, 0.15);
            color: var(--accent);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 12px;
            margin-right: 12px;
        }

        .header-sticky {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            letter-spacing: -0.5px;
        }
        .brand-logo::before {
            content: "";
            display: inline-block;
            width: 12px;
            height: 12px;
            background: var(--accent);
            border-radius: 50%;
            margin-right: 8px;
            box-shadow: 0 0 10px var(--accent);
        }
        .nav-links {
            display: flex;
            gap: 28px;
            list-style: none;
        }
        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            position: relative;
            padding: 8px 0;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
        }
        .nav-links a:hover::after {
            width: 100%;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #FFFFFF;
        }
        .btn-primary:hover {
            background-color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-accent {
            background-color: var(--accent);
            color: var(--dark-deep);
            font-weight: 700;
        }
        .btn-accent:hover {
            background-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(0, 212, 178, 0.4);
        }
        .btn-outline {
            border-color: var(--border-color);
            background: transparent;
            color: var(--text-main);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #F1F5F9;
        }

        /* 移动端菜单按钮 */
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        .mobile-menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--dark);
            margin: 5px 0;
            transition: var(--transition);
        }

        /* 基础 Section 布局 */
        section {
            padding: 80px 0;
            position: relative;
        }
        .section-header {
            max-width: 800px;
            margin: 0 auto 50px auto;
            text-align: center;
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--accent-blue);
            background: rgba(37, 99, 235, 0.08);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 1. Bento 首屏 (#hero-bento) */
        .hero-section {
            background: linear-gradient(135deg, #071526 0%, #0A2540 100%);
            color: #FFFFFF;
            padding: 60px 0 80px 0;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: radial-gradient(circle at 70% 30%, rgba(0, 212, 178, 0.12) 0%, transparent 60%);
            pointer-events: none;
        }
        .hero-bento-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
            margin-bottom: 24px;
        }
        .bento-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 36px;
            backdrop-filter: blur(10px);
            transition: var(--transition);
        }
        .bento-card:hover {
            border-color: rgba(0, 212, 178, 0.3);
            transform: translateY(-2px);
        }
        .bento-main {
            grid-row: span 2;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
            background-image: linear-gradient(to bottom, rgba(10, 37, 64, 0.85), rgba(7, 21, 38, 0.95)), url('/assets/images/3f58029a0ce8e11c.webp');
            background-size: cover;
            background-position: center;
        }
        .hero-h1 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-intro {
            font-size: 16px;
            line-height: 1.8;
            color: #CBD5E1;
            margin-bottom: 30px;
        }
        .hero-stats-row {
            display: flex;
            gap: 30px;
            margin-top: 20px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .stat-item .num {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent);
            font-family: ui-monospace, monospace;
        }
        .stat-item .label {
            font-size: 13px;
            color: #94A3B8;
        }
        .bento-feature-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .bento-feature-title::before {
            content: "◆";
            color: var(--accent);
            font-size: 12px;
        }
        .bento-feature-desc {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.6;
        }
        .hero-cta-bar {
            background: rgba(0, 212, 178, 0.08);
            border: 1px solid rgba(0, 212, 178, 0.2);
            border-radius: var(--radius-md);
            padding: 16px 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .cta-bar-text {
            font-size: 15px;
            color: #E2E8F0;
        }
        .cta-bar-text strong {
            color: var(--accent);
        }

        /* 2. 行业痛点与技术破局 (#problem-statement) */
        .problem-section {
            background-color: var(--bg-white);
        }
        .problem-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .problem-card {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: var(--transition);
        }
        .problem-card:hover {
            border-color: var(--accent-blue);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .problem-card-badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: #EF4444;
            background: #FEE2E2;
            padding: 2px 8px;
            border-radius: 4px;
            margin-bottom: 12px;
        }
        .problem-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--dark);
        }
        .problem-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 3. 软硬件技术底座架构 (#tech-intro) */
        .tech-intro-section {
            background-color: var(--bg-light);
        }
        .split-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .split-content h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 16px;
        }
        .split-content p {
            font-size: 15px;
            color: var(--text-main);
            margin-bottom: 24px;
            line-height: 1.8;
        }
        .spec-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 28px;
        }
        .spec-box {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 16px;
            border-radius: var(--radius-sm);
        }
        .spec-box .val {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
        }
        .spec-box .lbl {
            font-size: 12px;
            color: var(--text-muted);
        }
        .split-media {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }

        /* 4. 核心优势六维矩阵 (#core-advantages) */
        .advantages-section {
            background-color: var(--bg-white);
        }
        .grid-3col {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .adv-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 30px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .adv-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .adv-icon {
            width: 44px;
            height: 44px;
            border-radius: 8px;
            background: rgba(10, 37, 64, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 18px;
        }
        .adv-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }
        .adv-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 5. 热门产品与量产方案 (#products-solutions) */
        .solutions-section {
            background-color: var(--bg-light);
        }
        .solution-card-deep {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }
        .solution-card-deep:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .solution-media {
            height: 200px;
            overflow: hidden;
            background-color: #E2E8F0;
        }
        .solution-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .solution-card-deep:hover .solution-media img {
            transform: scale(1.05);
        }
        .solution-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .solution-tag {
            align-self: flex-start;
            font-size: 11px;
            font-weight: 700;
            background: #EFF6FF;
            color: var(--accent-blue);
            padding: 3px 8px;
            border-radius: 4px;
            margin-bottom: 12px;
        }
        .solution-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }
        .solution-body p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-grow: 1;
        }
        .feature-bullets {
            list-style: none;
            margin-bottom: 20px;
            border-top: 1px dashed var(--border-color);
            padding-top: 12px;
        }
        .feature-bullets li {
            font-size: 13px;
            color: var(--text-main);
            margin-bottom: 6px;
            position: relative;
            padding-left: 14px;
        }
        .feature-bullets li::before {
            content: "•";
            color: var(--accent-blue);
            position: absolute;
            left: 0;
            font-weight: bold;
        }

        /* 6. 深色全息技术理念闭环 (#tech-philosophy) */
        .dark-philosophy-section {
            background-color: var(--dark-deep);
            color: #FFFFFF;
            padding: 90px 0;
            position: relative;
        }
        .dark-philosophy-section .section-title {
            color: #FFFFFF;
        }
        .dark-philosophy-section .section-desc {
            color: #94A3B8;
        }
        .closed-loop-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .loop-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 24px;
            position: relative;
        }
        .loop-step-num {
            font-size: 32px;
            font-weight: 800;
            color: rgba(0, 212, 178, 0.2);
            line-height: 1;
            margin-bottom: 12px;
            font-family: ui-monospace, monospace;
        }
        .loop-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 8px;
        }
        .loop-card p {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.6;
        }

        /* 7. 车企与行业落地案例 (#use-cases) */
        .cases-section {
            background-color: var(--bg-white);
        }
        .case-item-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 24px;
        }
        .case-text {
            padding: 36px;
        }
        .case-text .industry-badge {
            font-size: 12px;
            font-weight: 700;
            color: var(--primary);
            background: #E2E8F0;
            padding: 3px 10px;
            border-radius: 20px;
            display: inline-block;
            margin-bottom: 12px;
        }
        .case-text h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
        }
        .case-text p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .case-result-list {
            display: flex;
            gap: 20px;
        }
        .case-result-item strong {
            display: block;
            font-size: 18px;
            font-weight: 800;
            color: var(--primary);
        }
        .case-result-item span {
            font-size: 12px;
            color: var(--text-muted);
        }
        .case-img {
            height: 100%;
            min-height: 280px;
            background-color: #CBD5E1;
        }
        .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* 8. 实施路径与成功路线图 (#success-path) */
        .path-section {
            background-color: var(--bg-light);
        }
        .timeline-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .timeline-grid::before {
            content: "";
            position: absolute;
            top: 28px;
            left: 5%;
            right: 5%;
            height: 2px;
            background: var(--border-color);
            z-index: 1;
        }
        .timeline-step {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            position: relative;
            z-index: 2;
        }
        .timeline-dot {
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--accent-blue);
            border: 3px solid #FFFFFF;
            box-shadow: 0 0 0 2px var(--accent-blue);
            margin-bottom: 16px;
        }
        .timeline-step h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
        }
        .timeline-step p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 9. 硬核指标数据条 (#metrics-bar) */
        .metrics-section {
            background-color: var(--primary);
            color: #FFFFFF;
            padding: 50px 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .metric-col .metric-value {
            font-size: 36px;
            font-weight: 800;
            color: var(--accent);
            font-family: ui-monospace, monospace;
            margin-bottom: 4px;
        }
        .metric-col .metric-title {
            font-size: 14px;
            color: #CBD5E1;
            font-weight: 500;
        }

        /* 10. 口碑评价体系与专家背书 (#testimonials) */
        .testimonials-section {
            background-color: var(--bg-white);
        }
        .testimonial-card {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            position: relative;
        }
        .testimonial-quote {
            font-size: 14px;
            color: var(--text-main);
            line-height: 1.7;
            margin-bottom: 20px;
            font-style: italic;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
        }
        .author-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
            font-size: 14px;
        }
        .author-info h5 {
            font-size: 14px;
            font-weight: 700;
            color: var(--dark);
        }
        .author-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 11. 常见技术与合规卡住点 (#faq-accordion) */
        .faq-section {
            background-color: var(--bg-light);
        }
        .faq-wrapper {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-header {
            padding: 18px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--dark);
            font-size: 15px;
        }
        .faq-header:hover {
            color: var(--accent-blue);
        }
        .faq-icon {
            font-size: 18px;
            transition: transform 0.3s ease;
        }
        .faq-body {
            padding: 0 24px 18px 24px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-body {
            display: block;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }

        /* 12. 前沿资讯与演化动态 (#news-insights) */
        .news-section {
            background-color: var(--bg-white);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .news-card {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-white);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        .news-card-body {
            padding: 20px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .news-meta {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            justify-content: space-between;
        }
        .news-card-body h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .news-card-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            flex-grow: 1;
        }

        /* 13. 车规级合规与认证保障条 (#compliance-bar) */
        .compliance-section {
            background-color: #071526;
            padding: 40px 0;
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
        }
        .compliance-flex {
            display: flex;
            justify-content: space-around;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        .comp-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #E2E8F0;
            font-size: 14px;
            font-weight: 600;
        }
        .comp-item-badge {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(0, 212, 178, 0.15);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 800;
        }

        /* 14. 合作转化与工程对齐 (#start-using) */
        .cta-section {
            background: linear-gradient(135deg, #0A2540 0%, #030712 100%);
            color: #FFFFFF;
            padding: 70px 0;
        }
        .cta-box {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 48px;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .cta-box h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 14px;
            color: #FFFFFF;
        }
        .cta-box p {
            font-size: 15px;
            color: #CBD5E1;
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .cta-form {
            background: #FFFFFF;
            padding: 28px;
            border-radius: var(--radius-md);
            color: var(--dark);
        }
        .form-group {
            margin-bottom: 14px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text-main);
        }
        .form-control {
            width: 100%;
            padding: 10px 14px;
            font-size: 14px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            outline: none;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--accent-blue);
            box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
        }

        /* 页脚 */
        footer {
            background-color: var(--dark-deep);
            color: #64748B;
            padding: 60px 0 30px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 20px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 14px;
            display: inline-block;
        }
        .footer-desc {
            font-size: 13px;
            line-height: 1.7;
            margin-bottom: 16px;
            color: #94A3B8;
        }
        .footer-col h5 {
            font-size: 15px;
            font-weight: 700;
            color: #F1F5F9;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: #94A3B8;
        }
        .footer-col ul a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: #475569;
        }

        /* 响应式断点适配 */
        @media (max-width: 1024px) {
            .hero-bento-grid {
                grid-template-columns: 1fr;
            }
            .grid-3col, .problem-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .closed-loop-grid, .timeline-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline-grid::before {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #FFFFFF;
                flex-direction: column;
                padding: 20px 24px;
                box-shadow: var(--shadow-lg);
                border-bottom: 1px solid var(--border-color);
                gap: 16px;
            }
            .nav-links.active {
                display: flex;
            }
            .hero-h1 {
                font-size: 28px;
            }
            .split-box, .case-item-split, .cta-box {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .grid-3col, .problem-grid, .closed-loop-grid, .timeline-grid, .metrics-grid, .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero-stats-row {
                flex-wrap: wrap;
                gap: 16px;
            }
            .hero-cta-bar {
                flex-direction: column;
                gap: 14px;
                text-align: center;
            }
            .case-result-list {
                flex-direction: column;
                gap: 10px;
            }
        }