/* roulang page: index */
:root {
      --primary: #1e3a8a;
      --primary-hover: #172554;
      --accent: #d97706;
      --accent-hover: #b45309;
      --dark-slate: #0f172a;
      --deep-gray: #1e293b;
      --text-main: #0f172a;
      --text-muted: #4b5563;
      --text-light: #94a3b8;
      --bg-white: #ffffff;
      --bg-light: #f8fafc;
      --bg-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --border-dark: #334155;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
      --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", PingFang SC, "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      color: var(--text-main);
      background-color: var(--bg-white);
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    ul, ol {
      list-style: none;
    }
    button, input, select, textarea {
      font: inherit;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .section-padding {
      padding: 84px 0;
    }
    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 52px;
    }
    .section-header.text-left {
      text-align: left;
      margin-left: 0;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      background: #eff6ff;
      border: 1px solid #dbeafe;
      padding: 4px 14px;
      border-radius: 9999px;
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }
    .section-tag.light {
      background: rgba(255, 255, 255, 0.12);
      border-color: rgba(255, 255, 255, 0.25);
      color: #93c5fd;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 28px;
      font-size: 0.98rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: none;
      transition: var(--transition);
      text-align: center;
      gap: 8px;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(30, 58, 138, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(30, 58, 138, 0.35);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(217, 119, 6, 0.25);
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(217, 119, 6, 0.35);
    }
    .btn-outline {
      border: 1px solid var(--border-color);
      background-color: #ffffff;
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }
    /* 双行导航条 */
    .top-bar {
      background-color: #f8fafc;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.82rem;
      color: var(--text-muted);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .site-header {
      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);
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }
    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 74px;
    }
    .site-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .site-logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), #3b82f6);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 1.15rem;
      box-shadow: 0 2px 8px rgba(30, 58, 138, 0.25);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .nav-item {
      font-size: 0.96rem;
      font-weight: 500;
      color: var(--text-main);
      position: relative;
      padding: 8px 4px;
    }
    .nav-item:hover {
      color: var(--primary);
    }
    .nav-item.active {
      color: var(--primary);
      font-weight: 700;
    }
    .nav-item.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--primary);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
      color: var(--text-main);
    }
    /* Hero 首屏 */
    .hero-section {
      position: relative;
      background: linear-gradient(180deg, #f0f7ff 0%, #ffffff 100%);
      padding: 72px 0 88px;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.2;
      color: var(--text-main);
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }
    .hero-content h1 span {
      background: linear-gradient(135deg, var(--primary), #2563eb);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 28px;
      line-height: 1.75;
    }
    .hero-features-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px 18px;
      margin-bottom: 34px;
    }
    .hero-feature-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.95rem;
      font-weight: 600;
      color: #334155;
    }
    .hero-feature-item svg {
      color: var(--primary);
      flex-shrink: 0;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 30px;
    }
    .hero-trust-bar {
      display: flex;
      align-items: center;
      gap: 20px;
      font-size: 0.85rem;
      color: var(--text-muted);
      padding-top: 20px;
      border-top: 1px solid rgba(226, 232, 240, 0.8);
    }
    .hero-media {
      position: relative;
    }
    .hero-media-wrapper {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-xl);
      border: 1px solid rgba(255, 255, 255, 0.8);
    }
    .hero-floating-card {
      position: absolute;
      bottom: -24px;
      left: -24px;
      background: #ffffff;
      padding: 18px 22px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      gap: 16px;
      z-index: 2;
    }
    .hero-floating-val {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1;
    }
    .hero-floating-lbl {
      font-size: 0.82rem;
      color: var(--text-muted);
      font-weight: 500;
    }
    /* 板块02: 技术参数底座 */
    .tech-specs-section {
      background-color: var(--bg-white);
      border-bottom: 1px solid var(--border-color);
    }
    .tech-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .specs-badge-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 28px;
    }
    .spec-card {
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: var(--radius-sm);
    }
    .spec-card .val {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .spec-card .lbl {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    /* 板块03: 优势六矩阵 */
    .advantages-section {
      background-color: var(--bg-light);
    }
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .matrix-card {
      background: #ffffff;
      padding: 32px 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .matrix-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #cbd5e1;
    }
    .matrix-icon {
      width: 48px;
      height: 48px;
      background: #eff6ff;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      margin-bottom: 20px;
    }
    .matrix-card h3 {
      font-size: 1.22rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .matrix-card p {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .matrix-metric {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--accent);
      background: #fffbeb;
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
    }
    /* 板块04: 产品套件 */
    .products-section {
      background-color: var(--bg-white);
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .product-box {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #ffffff;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .product-box:hover {
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }
    .product-box-img {
      position: relative;
      height: 200px;
      overflow: hidden;
      background-color: #e2e8f0;
    }
    .product-box-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .product-box:hover .product-box-img img {
      transform: scale(1.05);
    }
    .product-box-body {
      padding: 26px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-tag {
      font-size: 0.78rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .product-box h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .product-box p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex: 1;
    }
    .product-box-list {
      margin-bottom: 24px;
      font-size: 0.88rem;
      color: #334155;
    }
    .product-box-list li {
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    /* 板块05: 流程步骤 */
    .workflow-section {
      background-color: var(--bg-alt);
    }
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .step-item {
      background: #ffffff;
      padding: 28px 22px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
    }
    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
      margin-bottom: 18px;
    }
    .step-item h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .step-item p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    /* 板块06: 深色AI引擎专区 */
    .engine-section {
      background-color: var(--dark-slate);
      color: #ffffff;
      padding: 96px 0;
    }
    .engine-section .section-title {
      color: #ffffff;
    }
    .engine-section .section-desc {
      color: var(--text-light);
    }
    .engine-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 56px;
      align-items: center;
    }
    .engine-code-panel {
      background: #090d16;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 0.86rem;
      color: #38bdf8;
      line-height: 1.7;
      overflow-x: auto;
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }
    .engine-feature-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .engine-feat {
      display: flex;
      gap: 16px;
    }
    .engine-feat-num {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1;
    }
    .engine-feat h4 {
      font-size: 1.1rem;
      margin-bottom: 6px;
      color: #f1f5f9;
    }
    .engine-feat p {
      font-size: 0.9rem;
      color: var(--text-light);
      line-height: 1.6;
    }
    /* 板块07: 行业解决方案 */
    .solutions-section {
      background-color: var(--bg-white);
    }
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .solution-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      background: #ffffff;
      transition: var(--transition);
    }
    .solution-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-lg);
      transform: translateY(-3px);
    }
    .solution-badge {
      display: inline-block;
      font-size: 0.78rem;
      font-weight: 700;
      color: var(--primary);
      background: #eff6ff;
      padding: 3px 10px;
      border-radius: 4px;
      margin-bottom: 16px;
    }
    .solution-card h3 {
      font-size: 1.18rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .solution-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .solution-kpi {
      font-size: 0.85rem;
      font-weight: 600;
      color: #059669;
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }
    /* 板块08: 标杆客户故事 */
    .cases-section {
      background-color: var(--bg-light);
    }
    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 36px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      margin-bottom: 28px;
    }
    .case-info h3 {
      font-size: 1.45rem;
      font-weight: 800;
      margin-bottom: 14px;
    }
    .case-info p {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .case-metrics-bar {
      display: flex;
      gap: 28px;
    }
    .case-metric-item .val {
      font-size: 1.7rem;
      font-weight: 800;
      color: var(--primary);
    }
    .case-metric-item .lbl {
      font-size: 0.82rem;
      color: var(--text-muted);
    }
    .case-media {
      border-radius: var(--radius-sm);
      overflow: hidden;
      max-height: 300px;
    }
    .case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    /* 板块09: 关键运营数据统计条 */
    .metrics-strip {
      background: linear-gradient(135deg, var(--primary), #1e293b);
      color: #ffffff;
      padding: 48px 0;
    }
    .metrics-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .metric-col-val {
      font-size: 2.6rem;
      font-weight: 900;
      color: #60a5fa;
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .metric-col-label {
      font-size: 0.95rem;
      color: #cbd5e1;
    }
    /* 板块10: 真实口碑反馈 */
    .testimonials-section {
      background-color: var(--bg-white);
    }
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testi-card {
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-stars {
      color: #f59e0b;
      margin-bottom: 14px;
      font-size: 1rem;
      letter-spacing: 2px;
    }
    .testi-text {
      font-size: 0.94rem;
      color: #334155;
      line-height: 1.65;
      margin-bottom: 22px;
    }
    .testi-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #cbd5e1;
      overflow: hidden;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      background: var(--primary);
    }
    .user-meta h4 {
      font-size: 0.92rem;
      font-weight: 700;
    }
    .user-meta span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    /* 板块11: 合作伙伴 */
    .partners-section {      background-color: var(--bg-alt);
      padding: 56px 0;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .partners-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 20px;
      align-items: center;
    }
    .partner-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 16px 12px;
      text-align: center;
      font-size: 0.88rem;
      font-weight: 700;
      color: #64748b;
      letter-spacing: 0.5px;
      transition: var(--transition);
    }
    .partner-item:hover {
      color: var(--primary);
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    /* 板块12: 资讯前沿 */
    .news-section {
      background-color: var(--bg-white);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .news-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #ffffff;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .news-thumb {
      height: 180px;
      overflow: hidden;
      background-color: #f1f5f9;
    }
    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .news-card:hover .news-thumb img {
      transform: scale(1.04);
    }
    .news-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 10px;
    }
    .news-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex: 1;
    }
    /* 板块13: 安全合规条 */
    .security-section {
      background: #f8fafc;
      padding: 56px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .security-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .sec-badge-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 22px 18px;
      display: flex;
      gap: 14px;
      align-items: flex-start;
    }
    .sec-icon {
      width: 36px;
      height: 36px;
      background: #eff6ff;
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      flex-shrink: 0;
      font-weight: 900;
    }
    .sec-badge-card h4 {
      font-size: 0.96rem;
      margin-bottom: 4px;
      font-weight: 700;
    }
    .sec-badge-card p {
      font-size: 0.82rem;
      color: var(--text-muted);
      line-height: 1.5;
    }
    /* 板块14: FAQ 手风琴 */
    .faq-section {
      background-color: var(--bg-white);
    }
    .faq-container {
      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-sm);
      background: #ffffff;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-chevron {
      transition: transform 0.3s ease;
      color: var(--primary);
      font-size: 1.1rem;
    }
    .faq-item.active .faq-chevron {
      transform: rotate(180deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background-color: #f8fafc;
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.7;
      padding: 0 24px;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 18px 24px 22px;
      border-top: 1px solid #edf2f7;
    }
    /* 板块15: 底部行动转化区 */
    .cta-section {
      background: linear-gradient(135deg, #1e3a8a 0%, #0f172a 100%);
      color: #ffffff;
      padding: 80px 0;
      position: relative;
    }
    .cta-box {
      max-width: 840px;
      margin: 0 auto;
      text-align: center;
    }
    .cta-box h2 {
      font-size: 2.3rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: #ffffff;
    }
    .cta-box p {
      font-size: 1.08rem;
      color: #cbd5e1;
      margin-bottom: 36px;
      line-height: 1.7;
    }
    .cta-form {
      display: flex;
      gap: 12px;
      justify-content: center;
      max-width: 580px;
      margin: 0 auto 24px;
    }
    .cta-input {
      flex: 1;
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background: rgba(255, 255, 255, 0.08);
      color: #ffffff;
      outline: none;
      font-size: 0.95rem;
    }
    .cta-input::placeholder {
      color: #94a3b8;
    }
    .cta-input:focus {
      border-color: #60a5fa;
      background: rgba(255, 255, 255, 0.14);
    }
    .cta-notice {
      font-size: 0.82rem;
      color: #94a3b8;
    }
    /* 页脚 */
    .site-footer {
      background-color: #0b0f19;
      color: #94a3b8;
      padding: 72px 0 32px;
      font-size: 0.88rem;
      border-top: 1px solid #1e293b;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 56px;
    }
    .footer-brand h3 {
      color: #ffffff;
      font-size: 1.35rem;
      font-weight: 800;
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.65;
      margin-bottom: 18px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #ffffff;
      padding-left: 4px;
    }
    .footer-contact li {
      margin-bottom: 12px;
      line-height: 1.5;
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.82rem;
    }
    /* 响应式断点 */
    @media (max-width: 1024px) {
      .matrix-grid, .products-grid, .testimonials-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-steps, .solutions-grid, .security-row, .partners-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-grid, .tech-grid, .engine-grid, .case-card {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .hero-floating-card {
        bottom: 12px;
        left: 12px;
      }
    }
    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .header-inner {
        height: 64px;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 24px;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-color);
        gap: 16px;
        align-items: flex-start;
      }
      .nav-menu.open {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .hero-content h1 {
        font-size: 2.15rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .matrix-grid, .products-grid, .solutions-grid, .testimonials-grid, .news-grid, .workflow-steps, .security-row, .partners-grid {
        grid-template-columns: 1fr;
      }
      .cta-form {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }