/* roulang page: index */
:root {
            --bg-base: #FFFFFF;
            --bg-alt: #F8F9FA;
            --text-primary: #0F172A;
            --text-secondary: #475569;
            --text-tertiary: #64748B;
            --brand: #1A365D;
            --brand-hover: #102A4C;
            --accent: #D97706;
            --accent-light: #FEF3C7;
            --dark-section: #0B1120;
            --dark-card: #151F32;
            --border: rgba(15, 23, 42, 0.08);
            --border-dark: rgba(255, 255, 255, 0.12);
            --radius-sm: 4px;
            --radius: 6px;
            --radius-md: 8px;
            --shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            --shadow-hover: 0 12px 30px -4px rgba(15, 23, 42, 0.1);
            --container-max: 1280px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-primary);
            background-color: var(--bg-base);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.2s ease;
        }

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

        button, input, select, textarea {
            font: inherit;
        }

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

        /* 顶部通栏信息条与双行导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }

        .top-bar {
            background-color: #0F172A;
            color: #94A3B8;
            font-size: 0.8125rem;
            padding: 0.4rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .top-bar-tags {
            display: flex;
            gap: 1.25rem;
        }

        .top-bar-tags span {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

        .top-bar-contact {
            display: flex;
            gap: 1.5rem;
        }

        .nav-main {
            padding: 0.9rem 0;
        }

        .nav-main .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 0.65rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--brand);
            letter-spacing: -0.02em;
        }

        .brand-logo-icon {
            width: 28px;
            height: 28px;
            background: var(--brand);
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #FFF;
            font-size: 0.85rem;
            font-weight: 900;
            border: 1px solid var(--accent);
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 2rem;
            align-items: center;
        }

        .nav-link {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 0.35rem 0;
        }

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

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0%;
            height: 2px;
            background-color: var(--accent);
            transition: width 0.25s ease;
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.65rem 1.4rem;
            font-size: 0.875rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
            border: 1px solid transparent;
            text-align: center;
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--brand);
            color: #FFFFFF;
        }

        .btn-primary:hover {
            background-color: var(--brand-hover);
            box-shadow: 0 4px 12px rgba(26, 54, 93, 0.25);
            transform: translateY(-1px);
        }

        .btn-accent {
            background-color: var(--accent);
            color: #FFFFFF;
        }

        .btn-accent:hover {
            background-color: #B45309;
            transform: translateY(-1px);
        }

        .btn-outline {
            border-color: var(--border);
            background: #FFFFFF;
            color: var(--text-primary);
        }

        .btn-outline:hover {
            border-color: var(--brand);
            color: var(--brand);
        }

        .btn-outline-white {
            border-color: var(--border-dark);
            background: transparent;
            color: #FFFFFF;
        }

        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #FFFFFF;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--brand);
        }

        /* 统一Section样式 */
        section {
            padding: 5.5rem 0;
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-alt);
        }

        .section-dark {
            background-color: var(--dark-section);
            color: #E2E8F0;
        }

        .section-header {
            margin-bottom: 3.5rem;
        }

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

        .section-badge {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent);
            background: var(--accent-light);
            padding: 0.25rem 0.65rem;
            border-radius: var(--radius-sm);
            margin-bottom: 0.85rem;
        }

        .section-badge-dark {
            background: rgba(217, 119, 6, 0.15);
            color: #FBBF24;
            border: 1px solid rgba(217, 119, 6, 0.3);
        }

        .section-title {
            font-size: 2.15rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--brand);
            letter-spacing: -0.015em;
            margin-bottom: 1rem;
        }

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

        .section-desc {
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        .section-dark .section-desc {
            color: #94A3B8;
        }

        /* 板块1：全宽浅色矮横幅 Hero */
        .hero-banner {
            padding: 4.5rem 0 4rem 0;
            background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
            border-bottom: 1px solid var(--border);
        }

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

        .hero-content h1 {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--brand);
            letter-spacing: -0.02em;
            margin-bottom: 1.25rem;
        }

        .hero-desc {
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-secondary);
            margin-bottom: 2rem;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
            margin-bottom: 2rem;
        }

        .hero-badges-row {
            display: flex;
            gap: 1.5rem;
            border-top: 1px solid var(--border);
            padding-top: 1.5rem;
        }

        .hero-badge-item {
            font-size: 0.8125rem;
            color: var(--text-tertiary);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .hero-badge-item strong {
            color: var(--text-primary);
        }

        .hero-visual {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            background: #FFF;
        }

        .hero-visual img {
            width: 100%;
            height: 380px;
            object-fit: cover;
        }

        .hero-floating-stat {
            position: absolute;
            bottom: 1.25rem;
            left: 1.25rem;
            right: 1.25rem;
            background: rgba(15, 23, 42, 0.88);
            backdrop-filter: blur(8px);
            padding: 0.85rem 1.25rem;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: #FFFFFF;
            display: flex;
            justify-content: space-around;
        }

        .hero-floating-stat div {
            text-align: center;
        }

        .hero-floating-stat span {
            display: block;
            font-size: 0.75rem;
            color: #94A3B8;
        }

        .hero-floating-stat strong {
            font-size: 1.15rem;
            font-family: monospace, sans-serif;
            color: #FBBF24;
        }

        /* 板块2：架构解构 (#about) */
        .decomp-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
        }

        .decomp-image-box {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .decomp-image-box img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .decomp-spec-list {
            margin-top: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .decomp-spec-card {
            padding: 1.15rem;
            background: #FFFFFF;
            border: 1px solid var(--border);
            border-left: 3px solid var(--accent);
            border-radius: var(--radius-sm);
        }

        .decomp-spec-card h4 {
            font-size: 1.05rem;
            color: var(--brand);
            margin-bottom: 0.35rem;
        }

        .decomp-spec-card p {
            font-size: 0.875rem;
            color: var(--text-secondary);
        }

        /* 板块3：优势 Bento Grid (#advantages) */
        .bento-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .bento-card {
            background: #FFFFFF;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 2rem;
            transition: all 0.25s ease;
            box-shadow: var(--shadow);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .bento-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(26, 54, 93, 0.2);
        }

        .bento-card.wide {
            grid-column: span 2;
        }

        .bento-code {
            font-family: monospace;
            font-size: 0.8125rem;
            color: var(--accent);
            margin-bottom: 0.75rem;
            font-weight: 600;
        }

        .bento-card h3 {
            font-size: 1.25rem;
            color: var(--brand);
            margin-bottom: 0.75rem;
        }

        .bento-card p {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .bento-tag-wrap {
            margin-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .bento-tag {
            font-size: 0.75rem;
            padding: 0.25rem 0.5rem;
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            color: var(--text-tertiary);
            border: 1px solid var(--border);
        }

        /* 板块4：热门选型产品卡 (#products) */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .product-card {
            background: #FFFFFF;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow);
            display: flex;
            flex-direction: column;
            transition: all 0.25s ease;
        }

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

        .product-thumb {
            height: 200px;
            overflow: hidden;
            background: #F1F5F9;
            position: relative;
        }

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

        .product-card:hover .product-thumb img {
            transform: scale(1.04);
        }

        .product-badge-float {
            position: absolute;
            top: 0.85rem;
            right: 0.85rem;
            background: rgba(15, 23, 42, 0.85);
            color: #FFFFFF;
            font-size: 0.75rem;
            padding: 0.2rem 0.6rem;
            border-radius: var(--radius-sm);
            font-weight: 500;
        }

        .product-body {
            padding: 1.5rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .product-model {
            font-family: monospace;
            font-size: 0.875rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 0.25rem;
        }

        .product-body h3 {
            font-size: 1.2rem;
            color: var(--brand);
            margin-bottom: 0.65rem;
        }

        .product-body p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-bottom: 1.25rem;
        }

        .product-spec-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.8125rem;
            margin-bottom: 1.5rem;
        }

        .product-spec-table td {
            padding: 0.45rem 0;
            border-bottom: 1px solid var(--border);
        }

        .product-spec-table td:first-child {
            color: var(--text-tertiary);
            width: 45%;
        }

        .product-spec-table td:last-child {
            color: var(--text-primary);
            font-weight: 600;
            text-align: right;
            font-family: monospace;
        }

        .product-footer {
            margin-top: auto;
            display: flex;
            gap: 0.75rem;
        }

        .product-footer .btn {
            flex: 1;
            padding: 0.55rem;
            font-size: 0.8125rem;
        }

        /* 板块5：深色微架构理念 (#philosophy) */
        .philo-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }

        .philo-content h3 {
            font-size: 1.85rem;
            color: #FFFFFF;
            margin-bottom: 1.25rem;
            line-height: 1.3;
        }

        .philo-content p {
            font-size: 0.95rem;
            color: #94A3B8;
            margin-bottom: 1.5rem;
            line-height: 1.7;
        }

        .philo-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .philo-item {
            border-left: 2px solid var(--accent);
            padding-left: 1rem;
        }

        .philo-item h4 {
            color: #FFFFFF;
            font-size: 1.05rem;
            margin-bottom: 0.35rem;
        }

        .philo-item p {
            font-size: 0.8125rem;
            color: #64748B;
            margin-bottom: 0;
        }

        .philo-media {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-dark);
        }

        .philo-media img {
            width: 100%;
            height: 380px;
            object-fit: cover;
        }

        /* 板块6：行业应用实战故事 (#stories) */
        .stories-flow {
            display: flex;
            flex-direction: column;
            gap: 3.5rem;
        }

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

        .story-row.reverse {
            direction: rtl;
        }

        .story-row.reverse .story-detail {
            direction: ltr;
        }

        .story-row.reverse .story-visual {
            direction: ltr;
        }

        .story-visual {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }

        .story-visual img {
            width: 100%;
            height: 340px;
            object-fit: cover;
        }

        .story-detail .tag {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 0.5rem;
            display: block;
        }

        .story-detail h3 {
            font-size: 1.6rem;
            color: var(--brand);
            margin-bottom: 1rem;
            line-height: 1.3;
        }

        .story-detail p {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
        }

        .story-metrics-mini {
            display: flex;
            gap: 2rem;
            border-top: 1px solid var(--border);
            padding-top: 1.25rem;
        }

        .story-metrics-mini strong {
            font-size: 1.3rem;
            color: var(--brand);
            display: block;
            font-family: monospace;
        }

        .story-metrics-mini span {
            font-size: 0.75rem;
            color: var(--text-tertiary);
        }

        /* 板块7：可靠性指标统计条 (#metrics) */
        .metrics-strip {
            padding: 4rem 0;
            background: #111827;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .metric-cell {
            padding: 0.5rem;
        }

        .metric-value {
            font-size: 2.75rem;
            font-weight: 800;
            color: #FFFFFF;
            font-family: monospace;
            line-height: 1;
            margin-bottom: 0.5rem;
        }

        .metric-value span {
            color: var(--accent);
            font-size: 1.85rem;
        }

        .metric-label {
            font-size: 0.9375rem;
            color: #94A3B8;
            font-weight: 500;
        }

        .metric-sub {
            font-size: 0.75rem;
            color: #64748B;
            margin-top: 0.25rem;
        }

        /* 板块8：工程验证评价区 (#testimonials) */
        .testimonials-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }

        .testi-card {
            background: #FFFFFF;
            border: 1px solid var(--border);
            padding: 2.25rem;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow);
            position: relative;
        }

        .testi-quote {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 1.75rem;
            position: relative;
            z-index: 1;
        }

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

        .testi-avatar {
            width: 44px;
            height: 44px;
            background: #E2E8F0;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand);
            font-weight: 700;
            font-size: 0.9rem;
        }

        .testi-meta h4 {
            font-size: 0.9375rem;
            color: var(--text-primary);
        }

        .testi-meta p {
            font-size: 0.8125rem;
            color: var(--text-tertiary);
        }

        /* 板块9：技术前沿动态 (#news) */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .news-card {
            background: #FFFFFF;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1.75rem;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow);
            transition: all 0.2s ease;
        }

        .news-card:hover {
            transform: translateY(-3px);
            border-color: rgba(26, 54, 93, 0.25);
        }

        .news-date {
            font-size: 0.75rem;
            color: var(--text-tertiary);
            font-family: monospace;
            margin-bottom: 0.5rem;
        }

        .news-card h3 {
            font-size: 1.15rem;
            color: var(--brand);
            margin-bottom: 0.75rem;
            line-height: 1.4;
        }

        .news-card p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-bottom: 1.25rem;
            line-height: 1.6;
        }

        .news-link {
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--accent);
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }

        /* 板块10：技术问答与选型指南 (#faq) */
        .faq-wrapper {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: #FFFFFF;
            overflow: hidden;
            transition: border-color 0.2s ease;
        }

        .faq-item[open] {
            border-color: var(--brand);
        }

        .faq-summary {
            padding: 1.25rem 1.5rem;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--brand);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

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

        .faq-summary::after {
            content: '+';
            font-size: 1.35rem;
            font-weight: 400;
            color: var(--accent);
            transition: transform 0.25s ease;
        }

        .faq-item[open] .faq-summary::after {
            content: '−';
            transform: rotate(180deg);
        }

        .faq-content {
            padding: 0 1.5rem 1.25rem 1.5rem;
            font-size: 0.9375rem;
            color: var(--text-secondary);
            line-height: 1.7;
            border-top: 1px solid #F1F5F9;
            padding-top: 1rem;
        }

        /* 板块11：全幅深色行动呼吁 (#cta) */
        .cta-section {
            background: linear-gradient(135deg, #0B1120 0%, #151F32 100%);
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
            color: #FFFFFF;
        }

        .cta-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }

        .cta-text h2 {
            font-size: 2.25rem;
            color: #FFFFFF;
            margin-bottom: 1.25rem;
            line-height: 1.3;
        }

        .cta-text p {
            font-size: 1rem;
            color: #94A3B8;
            margin-bottom: 1.5rem;
            line-height: 1.7;
        }

        .cta-contact-points {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            margin-top: 1.5rem;
        }

        .cta-point {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.875rem;
            color: #CBD5E1;
        }

        .cta-point-icon {
            width: 20px;
            height: 20px;
            background: rgba(217, 119, 6, 0.2);
            color: #FBBF24;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-size: 0.75rem;
        }

        .cta-form {
            background: #FFFFFF;
            padding: 2.25rem;
            border-radius: var(--radius-md);
            color: var(--text-primary);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
        }

        .cta-form h3 {
            font-size: 1.25rem;
            color: var(--brand);
            margin-bottom: 0.5rem;
        }

        .cta-form p {
            font-size: 0.8125rem;
            color: var(--text-tertiary);
            margin-bottom: 1.5rem;
        }

        .form-group {
            margin-bottom: 1.15rem;
        }

        .form-label {
            display: block;
            font-size: 0.8125rem;
            font-weight: 600;
            margin-bottom: 0.35rem;
            color: var(--text-secondary);
        }

        .form-control {
            width: 100%;
            padding: 0.7rem 0.85rem;
            font-size: 0.875rem;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: #F8F9FA;
            color: var(--text-primary);
            outline: none;
            transition: all 0.2s ease;
        }

        .form-control:focus {
            background: #FFFFFF;
            border-color: var(--brand);
            box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
        }

        /* 板块12：资质规范条 (#guarantee) */
        .guarantee-bar {
            padding: 2.5rem 0;
            background: #F1F5F9;
            border-bottom: 1px solid var(--border);
        }

        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            align-items: center;
        }

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

        .guarantee-symbol {
            font-family: monospace;
            font-weight: 800;
            color: var(--brand);
            background: #FFFFFF;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .guarantee-text h4 {
            font-size: 0.9375rem;
            color: var(--text-primary);
            margin-bottom: 0.2rem;
        }

        .guarantee-text p {
            font-size: 0.75rem;
            color: var(--text-tertiary);
            line-height: 1.4;
        }

        /* 页脚规范 Footer */
        .site-footer {
            background: #0B1120;
            color: #94A3B8;
            padding: 4.5rem 0 2rem 0;
            border-top: 1px solid var(--border-dark);
            font-size: 0.875rem;
        }

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

        .footer-brand h3 {
            font-size: 1.25rem;
            color: #FFFFFF;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .footer-brand p {
            line-height: 1.7;
            margin-bottom: 1.25rem;
            color: #64748B;
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 0.9375rem;
            margin-bottom: 1.25rem;
            letter-spacing: 0.04em;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.65rem;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8125rem;
            color: #64748B;
        }

        .footer-bottom a {
            color: #94A3B8;
        }

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

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-grid, .decomp-grid, .philo-box, .cta-box {
                grid-template-columns: 1fr;
                gap: 2.5rem;
            }
            .bento-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .bento-card.wide {
                grid-column: span 2;
            }
            .products-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 2.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-menu {
                position: fixed;
                top: 61px;
                left: 0;
                right: 0;
                background: #FFFFFF;
                border-bottom: 1px solid var(--border);
                flex-direction: column;
                padding: 1.5rem;
                gap: 1rem;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
                display: none;
            }
            .nav-menu.show {
                display: flex;
            }
            .nav-actions {
                display: none;
            }
            .hero-content h1 {
                font-size: 2.15rem;
            }
            .bento-grid {
                grid-template-columns: 1fr;
            }
            .bento-card.wide {
                grid-column: span 1;
            }
            .products-grid, .news-grid, .testimonials-grid {
                grid-template-columns: 1fr;
            }
            .story-row, .story-row.reverse {
                grid-template-columns: 1fr;
                direction: ltr;
            }
            .guarantee-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 1rem;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            section {
                padding: 3.5rem 0;
            }
            .metrics-grid, .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .hero-floating-stat {
                display: none;
            }
        }