/* roulang page: index */
:root {
            --primary: #1E56A0;
            --primary-hover: #163e75;
            --primary-light: #EBF3FC;
            --secondary: #16C79A;
            --accent: #F6A93B;
            --dark-bg: #0F172A;
            --dark-card: #1E293B;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
            --shadow-sm: 0 2px 8px rgba(30, 86, 160, 0.04);
            --shadow-md: 0 10px 30px -5px rgba(30, 86, 160, 0.08);
            --shadow-lg: 0 20px 40px -10px rgba(30, 86, 160, 0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: var(--font-stack);
            color: var(--text-body);
            background-color: var(--bg-light);
            font-size: 16px;
            line-height: 1.65;
            overflow-x: hidden;
        }

        body {
            overflow-x: hidden;
            background-color: var(--bg-light);
        }

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

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

        /* 布局容器 */
        .container {
            width: 100%;
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-padding {
            padding-top: 90px;
            padding-bottom: 90px;
        }

        .section-header {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 50px auto;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            background-color: var(--primary-light);
            padding: 6px 14px;
            border-radius: 50px;
            letter-spacing: 1px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

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

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

        /* 顶部导航 */
        .top-bar {
            background-color: #0d1e38;
            color: #94A3B8;
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-info span {
            margin-right: 20px;
        }

        .site-header {
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

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

        .site-logo {
            font-size: 24px;
            font-weight: 900;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-logo-badge {
            background: var(--secondary);
            color: #fff;
            font-size: 11px;
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 700;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 28px;
            align-items: center;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-body);
            position: relative;
            padding: 8px 0;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: width 0.25s ease;
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 26px;
            font-size: 15px;
            font-weight: 700;
            border-radius: 50px;
            cursor: pointer;
            transition: all 0.25s ease;
            border: none;
            text-align: center;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(30, 86, 160, 0.3);
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(30, 86, 160, 0.4);
        }
        .btn-secondary {
            background-color: var(--secondary);
            color: #ffffff;
        }
        .btn-secondary:hover {
            background-color: #12ad85;
            transform: translateY(-2px);
        }
        .btn-outline {
            background-color: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background-color: var(--primary-light);
        }

        /* 移动端汉堡按钮 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 3px;
            background: var(--text-main);
            margin: 5px 0;
            transition: 0.3s;
            border-radius: 2px;
        }

        /* Section 1: Hero (本地定位探索 + 区域入口) */
        .hero-section {
            background: linear-gradient(135deg, #F0F6FF 0%, #FFFFFF 60%, #E8F4F8 100%);
            padding: 60px 0 80px 0;
            position: relative;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 40px;
            align-items: center;
        }
        .hero-badge-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
        }
        .location-tag {
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 13px;
            color: var(--primary);
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            box-shadow: var(--shadow-sm);
        }
        .hero-title {
            font-size: 44px;
            font-weight: 900;
            color: var(--text-main);
            line-height: 1.25;
            margin-bottom: 20px;
        }
        .hero-title span {
            color: var(--primary);
            position: relative;
        }
        .hero-description {
            font-size: 17px;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 30px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            margin-bottom: 35px;
            flex-wrap: wrap;
        }
        .hero-station-box {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 16px 20px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 15px;
        }
        .hero-station-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
        }
        .hero-station-desc {
            font-size: 12px;
            color: var(--text-muted);
        }
        .hero-image-wrap {
            position: relative;
        }
        .hero-img-main {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
            height: 420px;
            object-fit: cover;
        }
        .hero-floating-card {
            position: absolute;
            bottom: -20px;
            left: -20px;
            background: #ffffff;
            padding: 18px 24px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
            border-left: 5px solid var(--secondary);
        }
        .hero-floating-card .num {
            font-size: 26px;
            font-weight: 900;
            color: var(--text-main);
        }
        .hero-floating-card .lbl {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Section 1.5: 浮动指标看板 */
        .metrics-bar {
            background: #ffffff;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            padding: 35px 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }
        .metric-item {
            border-right: 1px dashed var(--border-color);
            padding: 0 10px;
        }
        .metric-item:last-child {
            border-right: none;
        }
        .metric-value {
            font-size: 38px;
            font-weight: 900;
            color: var(--primary);
            margin-bottom: 6px;
            font-feature-settings: "tnum";
        }
        .metric-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-body);
            margin-bottom: 4px;
        }
        .metric-sub {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Section 2: 合集目录与素养体系 */
        .catalog-section {
            background: #ffffff;
        }
        .catalog-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .catalog-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .catalog-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px;
            background: var(--bg-light);
            border-radius: var(--radius-md);
            border: 1px solid transparent;
            transition: all 0.3s;
        }
        .catalog-item:hover {
            border-color: var(--primary);
            background: #ffffff;
            box-shadow: var(--shadow-md);
            transform: translateX(6px);
        }
        .catalog-idx {
            width: 36px;
            height: 36px;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 800;
            font-size: 16px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .catalog-info h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
        }
        .catalog-info p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Section 3: 核心优势矩阵 */
        .advantages-section {
            background-color: var(--bg-light);
        }
        .adv-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .adv-card {
            background: #ffffff;
            padding: 32px 26px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }
        .adv-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(30, 86, 160, 0.3);
        }
        .adv-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 900;
            margin-bottom: 20px;
        }
        .adv-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .adv-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* Section 4: 热门推荐与课程产品矩阵 */
        .products-section {
            background: #ffffff;
        }
        .prod-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .prod-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            transition: all 0.3s;
        }
        .prod-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }
        .prod-media {
            position: relative;
            height: 220px;
            overflow: hidden;
        }
        .prod-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .prod-card:hover .prod-img {
            transform: scale(1.05);
        }
        .prod-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(15, 23, 42, 0.85);
            color: #ffffff;
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 20px;
            backdrop-filter: blur(4px);
            font-weight: 600;
        }
        .prod-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .prod-title {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .prod-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .prod-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 20px;
        }
        .prod-tag-item {
            font-size: 12px;
            background: var(--bg-light);
            color: var(--text-body);
            padding: 3px 8px;
            border-radius: 4px;
            border: 1px solid var(--border-color);
        }
        .prod-footer {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid var(--border-color);
        }
        .prod-age {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
        }

        /* Section 5: 深色理念与阶梯跃迁 */
        .philosophy-section {
            background-color: var(--dark-bg);
            color: #ffffff;
            padding: 100px 0;
        }
        .philosophy-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .philo-header .section-tag {
            background: rgba(22, 199, 154, 0.2);
            color: var(--secondary);
        }
        .philo-header h2 {
            font-size: 34px;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 20px;
            line-height: 1.35;
        }
        .philo-header p {
            color: #94A3B8;
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 30px;
        }
        .philo-steps {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .philo-step-item {
            background: var(--dark-card);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: all 0.3s ease;
        }
        .philo-step-item:hover {
            border-color: var(--secondary);
            transform: translateX(8px);
        }
        .step-num {
            font-size: 20px;
            font-weight: 900;
            color: var(--secondary);
            background: rgba(22, 199, 154, 0.1);
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .step-content h4 {
            font-size: 17px;
            font-weight: 700;
            color: #F8FAFC;
            margin-bottom: 6px;
        }
        .step-content p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.5;
        }

        /* Section 6: 里程碑闭环 */
        .milestone-section {
            background: var(--bg-light);
        }
        .timeline-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .timeline-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 30px 20px;
            border: 1px solid var(--border-color);
            position: relative;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }
        .timeline-card::after {
            content: '→';
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 24px;
            color: var(--primary);
            font-weight: 900;
            z-index: 2;
        }
        .timeline-card:last-child::after {
            display: none;
        }
        .timeline-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 16px auto;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .timeline-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .timeline-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Section 7: 真实故事与前后对比 */
        .stories-section {
            background: #ffffff;
        }
        .story-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            background: var(--bg-light);
            border-radius: var(--radius-lg);
            padding: 36px;
            border: 1px solid var(--border-color);
            align-items: center;
        }
        .story-img {
            border-radius: var(--radius-md);
            width: 100%;
            height: 360px;
            object-fit: cover;
            box-shadow: var(--shadow-md);
        }
        .story-content h3 {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 16px;
        }
        .story-compare {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin: 20px 0;
        }
        .compare-pane {
            padding: 14px;
            border-radius: var(--radius-sm);
            background: #ffffff;
            border: 1px solid var(--border-color);
        }
        .compare-pane.before {
            border-left: 4px solid #CBD5E1;
        }
        .compare-pane.after {
            border-left: 4px solid var(--secondary);
        }
        .compare-title {
            font-size: 13px;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-main);
        }
        .compare-text {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Section 8: 用户口碑评测 */
        .reviews-section {
            background: var(--bg-light);
        }
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }
        .review-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .review-stars {
            color: var(--accent);
            font-size: 16px;
            margin-bottom: 12px;
            letter-spacing: 2px;
        }
        .review-text {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-top: 16px;
            border-top: 1px solid var(--border-color);
        }
        .user-avatar-char {
            width: 40px;
            height: 40px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
        }
        .user-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
        }
        .user-tag {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Section 9: 前沿资讯专栏 */
        .news-section {
            background: #ffffff;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .news-card {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s;
            background: #ffffff;
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .news-img {
            height: 180px;
            width: 100%;
            object-fit: cover;
        }
        .news-body {
            padding: 20px;
        }
        .news-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .news-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-summary {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .news-link {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Section 10: 资质与平台保障 */
        .assurance-section {
            background: var(--bg-light);
        }
        .assurance-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .assure-item {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .assure-badge {
            width: 48px;
            height: 48px;
            margin: 0 auto 14px auto;
            background: #ECFDF5;
            color: var(--secondary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
        }
        .assure-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .assure-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Section 11: 快速解答与常见问题 */
        .faq-section {
            background: #ffffff;
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: #ffffff;
            transition: all 0.2s;
        }
        .faq-item details summary {
            padding: 20px 24px;
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-item details summary::-webkit-details-marker {
            display: none;
        }
        .faq-item details summary::after {
            content: "+";
            font-size: 22px;
            font-weight: 400;
            color: var(--primary);
            transition: transform 0.25s;
        }
        .faq-item details[open] summary::after {
            transform: rotate(45deg);
        }
        .faq-content {
            padding: 0 24px 20px 24px;
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.75;
            border-top: 1px dashed var(--border-color);
            padding-top: 16px;
        }

        /* Section 12: 测评预约与咨询表单 (收口) */
        .contact-section {
            background: linear-gradient(135deg, #1E56A0 0%, #0F172A 100%);
            color: #ffffff;
            padding: 90px 0;
        }
        .contact-wrap {
            max-width: 820px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 45px;
            color: var(--text-body);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
        }
        .contact-header {
            text-align: center;
            margin-bottom: 30px;
        }
        .contact-header h3 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .contact-header p {
            font-size: 15px;
            color: var(--text-muted);
        }
        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .form-group.full {
            grid-column: span 2;
        }
        .form-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }
        .form-input, .form-select {
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 15px;
            outline: none;
            transition: border-color 0.2s;
            font-family: inherit;
        }
        .form-input:focus, .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(30, 86, 160, 0.15);
        }
        .privacy-hint {
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
            margin-top: 15px;
        }

        /* 统一页脚 */
        .site-footer {
            background-color: #0B1120;
            color: #94A3B8;
            padding: 70px 0 30px 0;
            border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 50px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--primary);
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a:hover {
            color: #FFFFFF;
            padding-left: 4px;
        }
        .footer-contact-item {
            display: flex;
            gap: 10px;
            margin-bottom: 12px;
            line-height: 1.5;
        }
        .footer-bottom {
            padding-top: 25px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 13px;
        }
        .footer-cert {
            display: flex;
            gap: 15px;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
            }
            .catalog-layout {
                grid-template-columns: 1fr;
            }
            .philosophy-grid {
                grid-template-columns: 1fr;
            }
            .adv-grid, .prod-grid, .news-grid, .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline-grid, .assurance-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline-card::after {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-menu {
                position: absolute;
                top: 76px;
                left: 0;
                width: 100%;
                background: #ffffff;
                flex-direction: column;
                padding: 24px;
                box-shadow: var(--shadow-lg);
                display: none;
                gap: 18px;
            }
            .nav-menu.active {
                display: flex;
            }
            .header-cta .btn {
                display: none;
            }
            .hero-title {
                font-size: 32px;
            }
            .section-title {
                font-size: 26px;
            }
            .section-padding {
                padding-top: 60px;
                padding-bottom: 60px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .metric-item {
                border-right: none;
            }
            .adv-grid, .prod-grid, .news-grid, .reviews-grid, .timeline-grid, .assurance-grid {
                grid-template-columns: 1fr;
            }
            .story-box {
                grid-template-columns: 1fr;
                padding: 20px;
            }
            .story-compare {
                grid-template-columns: 1fr;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group.full {
                grid-column: span 1;
            }
            .contact-wrap {
                padding: 25px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }