/* roulang page: index */
:root {
      --bg-dark: #070B14;
      --bg-surface: #0B132B;
      --bg-card: rgba(16, 26, 48, 0.65);
      --primary-cyan: #00E5FF;
      --primary-blue: #1D63FF;
      --accent-orange: #FF6B00;
      --text-white: #FFFFFF;
      --text-body: #D1D5DB;
      --text-muted: #9CA3AF;
      --border-cyan: rgba(0, 229, 255, 0.18);
      --border-light: rgba(255, 255, 255, 0.1);
      --glow-cyan: 0 0 20px rgba(0, 229, 255, 0.4);
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

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

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-body);
      font-family: var(--font-stack);
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行导航系统 */
    .top-bar {
      background: #04070D;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 12px;
      color: var(--text-muted);
      padding: 6px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-right {
      display: flex;
      gap: 20px;
    }
    .top-bar-right span {
      color: var(--primary-cyan);
    }

    header.main-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(7, 11, 20, 0.85);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-cyan);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 700;
      color: var(--text-white);
      letter-spacing: 0.5px;
    }
    .brand-logo-icon {
      width: 36px;
      height: 36px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-blue));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #000;
      font-weight: 900;
      box-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      font-size: 14px;
      color: var(--text-body);
      font-weight: 500;
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-cyan);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-cyan);
      transition: width 0.3s ease;
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }

    /* 按钮样式 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.3s ease;
      min-height: 44px;
      line-height: 1;
    }
    .btn-glow {
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-blue));
      color: #ffffff;
      box-shadow: var(--glow-cyan);
    }
    .btn-glow:hover {
      transform: translateY(-2px) scale(1.02);
      box-shadow: 0 0 28px rgba(0, 229, 255, 0.6);
      color: #ffffff;
    }
    .btn-ghost {
      background: transparent;
      color: var(--text-white);
      border: 1px solid rgba(255, 255, 255, 0.25);
    }
    .btn-ghost:hover {
      border-color: var(--primary-cyan);
      color: var(--primary-cyan);
      box-shadow: 0 0 15px rgba(0, 229, 255, 0.2);
    }

    /* 汉堡按钮 */
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--text-white);
      font-size: 24px;
      cursor: pointer;
    }

    /* 通用Section */
    section {
      padding: 96px 0;
      position: relative;
    }
    .section-alt {
      background: var(--bg-surface);
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }
    .section-header {
      margin-bottom: 56px;
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--primary-cyan);
      background: rgba(0, 229, 255, 0.08);
      border: 1px solid rgba(0, 229, 255, 0.2);
      padding: 4px 12px;
      border-radius: 99px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-white);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto;
      line-height: 1.7;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-md);
      padding: 32px;
      transition: all 0.35s ease;
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      transform: translateY(-4px);
      border-color: rgba(0, 229, 255, 0.45);
      box-shadow: 0 12px 32px rgba(0, 229, 255, 0.12);
    }

    /* Section 1: Hero (众筹预热 / 任务量产预研版式) */
    .hero-section {
      min-height: calc(100vh - 105px);
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 75% 25%, rgba(29, 99, 255, 0.22), transparent 50%),
                  radial-gradient(circle at 10% 70%, rgba(0, 229, 255, 0.12), transparent 45%),
                  url('/assets/images/d36680406385fd02.webp') center/cover no-repeat;
      position: relative;
      padding: 80px 0;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: rgba(7, 11, 20, 0.88);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .hero-text h1 {
      font-size: 44px;
      font-weight: 800;
      color: var(--text-white);
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -1px;
    }
    .hero-text h1 span {
      background: linear-gradient(90deg, #00E5FF, #3B82F6);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 16px;
      line-height: 1.8;
      color: #E2E8F0;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-stats-strip {
      display: flex;
      gap: 32px;
      border-top: 1px solid var(--border-light);
      padding-top: 24px;
    }
    .hero-stat-item .stat-num {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary-cyan);
      font-family: monospace;
    }
    .hero-stat-item .stat-lbl {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Hero 右侧：预热档位与进度环面板 */
    .hero-crowd-card {
      background: rgba(11, 19, 43, 0.85);
      border: 1px solid var(--primary-cyan);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: 0 0 35px rgba(0, 229, 255, 0.15);
      position: relative;
    }
    .progress-circle-wrap {
      display: flex;
      align-items: center;
      gap: 24px;
      margin-bottom: 28px;
      padding-bottom: 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .circle-progress {
      width: 100px;
      height: 100px;
      border-radius: 50%;
      background: conic-gradient(var(--primary-cyan) 306deg, rgba(255, 255, 255, 0.1) 0deg);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
    }
    .circle-inner {
      width: 78px;
      height: 78px;
      background: var(--bg-surface);
      border-radius: 50%;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--text-white);
      font-size: 18px;
    }
    .circle-inner span {
      font-size: 10px;
      color: var(--text-muted);
      font-weight: 400;
    }
    .tier-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 24px;
    }
    .tier-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px 16px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: var(--radius-sm);
      font-size: 13px;
    }
    .tier-item.active {
      border-color: var(--primary-cyan);
      background: rgba(0, 229, 255, 0.05);
    }
    .tier-name {
      color: var(--text-white);
      font-weight: 600;
    }
    .tier-val {
      color: var(--primary-cyan);
      font-weight: 700;
    }

    /* Section 2: 产线制造与适航能力 */
    .capacity-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .capacity-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .capacity-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .capacity-card:hover img {
      transform: scale(1.05);
    }
    .capacity-card-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .capacity-card-title {
      font-size: 18px;
      color: var(--text-white);
      margin-bottom: 10px;
      font-weight: 600;
    }
    .capacity-card-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 3: 规格参数对比表 */
    .table-container {
      background: var(--bg-card);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-md);
      overflow-x: auto;
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .spec-table th, .spec-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .spec-table th {
      background: rgba(29, 99, 255, 0.1);
      color: var(--primary-cyan);
      font-weight: 600;
      white-space: nowrap;
    }
    .spec-table td {
      color: var(--text-body);
    }
    .spec-table tr:hover td {
      background: rgba(0, 229, 255, 0.02);
    }
    .badge-highlight {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 12px;
      background: rgba(0, 229, 255, 0.15);
      color: var(--primary-cyan);
      border: 1px solid rgba(0, 229, 255, 0.3);
    }

    /* Section 4: 案例现场 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .case-item {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
      background: var(--bg-surface);
    }
    .case-item img {
      width: 100%;
      height: 260px;
      object-fit: cover;
    }
    .case-content {
      padding: 24px;
    }
    .case-tag {
      font-size: 12px;
      color: var(--accent-orange);
      font-weight: 600;
      margin-bottom: 8px;
    }
    .case-title {
      font-size: 20px;
      color: var(--text-white);
      margin-bottom: 12px;
    }
    .case-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 5: 六步适航与量产交付流程 */
    .delivery-timeline {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 16px;
      position: relative;
    }
    .delivery-step {
      background: var(--bg-card);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-sm);
      padding: 20px 16px;
      text-align: center;
      position: relative;
    }
    .step-index {
      width: 32px;
      height: 32px;
      margin: 0 auto 12px;
      background: var(--primary-blue);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 700;
    }
    .step-title {
      font-size: 15px;
      color: var(--text-white);
      margin-bottom: 8px;
      font-weight: 600;
    }
    .step-desc {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Section 6: 核心技术优势网格 (扩展) */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: all 0.3s;
    }
    .feature-card:hover {
      border-color: var(--primary-cyan);
      box-shadow: var(--shadow-card);
      transform: translateY(-4px);
    }
    .feature-icon-box {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid var(--primary-cyan);
      color: var(--primary-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
    }
    .feature-title {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-white);
      margin-bottom: 10px;
    }
    .feature-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 7: 关键数据看板 (指标流) */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      background: linear-gradient(180deg, rgba(16, 26, 48, 0.9), rgba(7, 11, 20, 0.95));
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-md);
      padding: 32px 20px;
      text-align: center;
      position: relative;
    }
    .metric-value {
      font-size: 40px;
      font-weight: 800;
      color: var(--primary-cyan);
      font-family: monospace;
      margin-bottom: 8px;
      text-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
    }
    .metric-label {
      font-size: 14px;
      color: var(--text-body);
      font-weight: 500;
    }
    .metric-sub {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 6px;
    }

    /* Section 8: 试飞与工程团队评价 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-text {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 16px;
    }
    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-blue));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 700;
      font-size: 14px;
    }
    .author-name {
      font-size: 14px;
      color: var(--text-white);
      font-weight: 600;
    }
    .author-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Section 9: 飞控资讯与航电快报 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 12px;
      color: var(--primary-cyan);
      margin-bottom: 8px;
      font-family: monospace;
    }
    .news-title {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-white);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      flex: 1;
      margin-bottom: 16px;
    }
    .news-link {
      font-size: 13px;
      color: var(--primary-cyan);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-weight: 500;
    }

    /* Section 10: 平台保障与实验室认证 */
    .guarantee-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .guarantee-item {
      background: rgba(16, 26, 48, 0.4);
      border: 1px solid rgba(0, 229, 255, 0.12);
      border-radius: var(--radius-sm);
      padding: 20px;
      text-align: center;
    }
    .guarantee-title {
      font-size: 15px;
      color: var(--text-white);
      font-weight: 600;
      margin-bottom: 6px;
    }
    .guarantee-desc {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Section 11: 互动选型配置器 */
    .selector-box {
      background: var(--bg-card);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-md);
      padding: 36px;
    }
    .selector-steps {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-bottom: 32px;
    }
    .selector-col h4 {
      font-size: 15px;
      color: var(--text-white);
      margin-bottom: 12px;
      font-weight: 600;
    }
    .tag-group {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .select-btn {
      padding: 8px 16px;
      font-size: 13px;
      color: var(--text-body);
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s ease;
    }
    .select-btn.active, .select-btn:hover {
      background: rgba(0, 229, 255, 0.15);
      border-color: var(--primary-cyan);
      color: var(--primary-cyan);
    }
    .selector-result {
      background: rgba(11, 19, 43, 0.9);
      border: 1px dashed var(--primary-cyan);
      border-radius: var(--radius-sm);
      padding: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .result-info h5 {
      font-size: 16px;
      color: var(--text-white);
      margin-bottom: 6px;
    }
    .result-info p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Section 12: 常见技术答疑 (FAQ) */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: border-color 0.3s;
    }
    .faq-item.active {
      border-color: var(--primary-cyan);
    }
    .faq-q {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-white);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }
    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s ease;
      color: var(--primary-cyan);
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }
    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
      font-size: 14px;
      line-height: 1.7;
      color: var(--text-body);
      background: rgba(0, 0, 0, 0.2);
    }
    .faq-item.active .faq-a {
      max-height: 300px;
      padding: 0 24px 20px;
    }

    /* Section 13: 询盘与测试申请表单 */
    .inquiry-wrap {
      background: linear-gradient(135deg, rgba(16, 26, 48, 0.95), rgba(11, 19, 43, 0.95));
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-lg);
      padding: 56px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      box-shadow: 0 0 40px rgba(0, 229, 255, 0.1);
    }
    .inquiry-left h3 {
      font-size: 28px;
      color: var(--text-white);
      margin-bottom: 16px;
      font-weight: 700;
    }
    .inquiry-left p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 28px;
    }
    .contact-spec-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      font-size: 14px;
    }
    .contact-spec-item {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--text-body);
    }
    .contact-spec-item span {
      color: var(--primary-cyan);
      font-weight: 600;
    }
    .inquiry-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group label {
      font-size: 13px;
      color: var(--text-white);
      font-weight: 500;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      background: rgba(7, 11, 20, 0.75);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      font-size: 14px;
      color: var(--text-white);
      outline: none;
      transition: border-color 0.3s;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary-cyan);
    }
    .form-textarea {
      resize: vertical;
      min-height: 84px;
    }

    /* 合作伙伴矩阵 */
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 16px;
    }
    .partner-item {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--text-muted);
      font-size: 14px;
      letter-spacing: 1px;
      text-transform: uppercase;
      transition: all 0.3s;
    }
    .partner-item:hover {
      border-color: var(--primary-cyan);
      color: var(--primary-cyan);
    }

    /* 页脚 */
    footer.main-footer {
      background: #05080E;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 80px 0 32px;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 60px;
    }
    .footer-brand h4 {
      font-size: 20px;
      color: var(--text-white);
      margin-bottom: 16px;
      font-weight: 700;
    }
    .footer-brand p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .footer-col h5 {
      font-size: 15px;
      color: var(--text-white);
      margin-bottom: 18px;
      font-weight: 600;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      font-size: 13px;
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--primary-cyan);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: var(--text-muted);
    }
    .footer-bottom a {
      color: var(--text-muted);
    }
    .footer-bottom a:hover {
      color: var(--primary-cyan);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-content {
        grid-template-columns: 1fr;
      }
      .capacity-grid, .features-grid, .news-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .delivery-timeline {
        grid-template-columns: repeat(3, 1fr);
      }
      .metrics-bar, .guarantee-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .partner-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-top {
        grid-template-columns: repeat(2, 1fr);
      }
      .inquiry-wrap {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar-inner {
        flex-direction: column;
        gap: 4px;
        text-align: center;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-menu {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(7, 11, 20, 0.98);
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-cyan);
        display: none;
      }
      .nav-menu.show {
        display: flex;
      }
      .hero-text h1 {
        font-size: 32px;
      }
      .capacity-grid, .features-grid, .news-grid, .testimonial-grid, .cases-grid {
        grid-template-columns: 1fr;
      }
      .delivery-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .selector-steps {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .inquiry-wrap {
        padding: 28px;
      }
    }
    @media (max-width: 520px) {
      .delivery-timeline {
        grid-template-columns: 1fr;
      }
      .metrics-bar, .guarantee-bar, .partner-grid {
        grid-template-columns: 1fr;
      }
      .hero-stats-strip {
        flex-direction: column;
        gap: 12px;
      }
      .hero-actions {
        flex-direction: column;
      }
      .selector-result {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
      }
    }