/* roulang page: index */
:root {
      --primary: #0F52BA;
      --primary-hover: #0b3e8f;
      --accent: #FF5E14;
      --accent-hover: #e04b06;
      --bg-main: #F8F9FA;
      --bg-card: #FFFFFF;
      --bg-dark: #0D131A;
      --bg-dark-card: #16202B;
      --text-main: #121826;
      --text-body: #374151;
      --text-muted: #6B7280;
      --text-light: #F9FAFB;
      --border-color: rgba(15, 82, 186, 0.08);
      --border-dark: rgba(255, 255, 255, 0.1);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 4px 12px rgba(15, 82, 186, 0.04);
      --shadow-md: 0 12px 24px -6px rgba(15, 82, 186, 0.1);
      --shadow-lg: 0 20px 35px -10px rgba(15, 82, 186, 0.16);
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
      --container-max: 1240px;
    }

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

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      color: var(--text-body);
      background-color: var(--bg-main);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    ul, ol {
      list-style: none;
    }

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

    button, input, select {
      font: inherit;
      outline: none;
    }

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

    /* 顶部双行导航系统 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .top-bar {
      background: #0B1E3B;
      color: rgba(255, 255, 255, 0.85);
      font-size: 0.85rem;
      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;
      gap: 16px;
    }
    .top-signal {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10B981;
      animation: pulseGreen 2s infinite;
    }
    @keyframes pulseGreen {
      0% { opacity: 0.6; }
      50% { opacity: 1; }
      100% { opacity: 0.6; }
    }

    .main-nav {
      padding: 16px 0;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.4rem;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .brand-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.1rem;
      font-weight: 900;
      box-shadow: 0 4px 10px rgba(15, 82, 186, 0.3);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-link {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-main);
      padding: 6px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: var(--transition);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 11px 24px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(15, 82, 186, 0.25);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(15, 82, 186, 0.35);
    }
    .btn-accent {
      background: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(255, 94, 20, 0.25);
    }
    .btn-accent:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(255, 94, 20, 0.35);
    }
    .btn-outline {
      border-color: rgba(255, 255, 255, 0.4);
      color: #FFFFFF;
      background: rgba(255, 255, 255, 0.08);
    }
    .btn-outline:hover {
      background: #FFFFFF;
      color: var(--primary);
    }

    /* Section 通用规范 */
    .section-block {
      padding: 85px 0;
      position: relative;
    }
    .section-alt {
      background-color: #FFFFFF;
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: var(--text-light);
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: rgba(15, 82, 186, 0.08);
      color: var(--primary);
      font-size: 0.82rem;
      font-weight: 700;
      border-radius: 30px;
      letter-spacing: 1px;
      margin-bottom: 12px;
      text-transform: uppercase;
    }
    .section-dark .section-tag {
      background: rgba(255, 94, 20, 0.15);
      color: var(--accent);
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.75;
    }
    .section-dark .section-desc {
      color: #9CA3AF;
    }

    /* 板块 1: Hero（文档帮助与检索中心样式） */
    .hero-center {
      position: relative;
      background: radial-gradient(circle at top right, rgba(15, 82, 186, 0.08), transparent 50%),
                  radial-gradient(circle at bottom left, rgba(255, 94, 20, 0.05), transparent 40%),
                  #FFFFFF;
      padding: 90px 0 80px;
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }
    .hero-center-content {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }
    .hero-h1 {
      font-size: 2.85rem;
      font-weight: 850;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-lead {
      font-size: 1.15rem;
      color: var(--text-body);
      margin-bottom: 36px;
      line-height: 1.8;
    }
    .hero-search-box {
      background: #FFFFFF;
      border: 2px solid rgba(15, 82, 186, 0.2);
      border-radius: var(--radius-md);
      padding: 8px 10px 8px 24px;
      display: flex;
      align-items: center;
      box-shadow: 0 16px 32px -8px rgba(15, 82, 186, 0.12);
      margin-bottom: 22px;
      transition: var(--transition);
    }
    .hero-search-box:focus-within {
      border-color: var(--primary);
      box-shadow: 0 18px 36px -6px rgba(15, 82, 186, 0.2);
    }
    .hero-search-input {
      flex: 1;
      border: none;
      font-size: 1.05rem;
      color: var(--text-main);
      background: transparent;
    }
    .hero-chips-wrap {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 10px;
      font-size: 0.88rem;
    }
    .chip-label {
      color: var(--text-muted);
      font-weight: 500;
    }
    .chip-item {
      display: inline-block;
      padding: 5px 14px;
      background: #EFF6FF;
      color: var(--primary);
      border-radius: 20px;
      font-weight: 500;
      border: 1px solid rgba(15, 82, 186, 0.12);
      transition: var(--transition);
    }
    .chip-item:hover {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
    }

    /* 板块 2: KPI 看板数据区 */
    .kpi-section {
      background: #0B192C;
      color: #FFFFFF;
      padding: 60px 0;
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .kpi-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
    }
    .kpi-item {
      padding: 24px;
      border-right: 1px solid rgba(255, 255, 255, 0.08);
      position: relative;
    }
    .kpi-item:last-child {
      border-right: none;
    }
    .kpi-value {
      font-size: 2.9rem;
      font-weight: 850;
      color: #FFFFFF;
      line-height: 1.1;
      margin-bottom: 8px;
      font-variant-numeric: tabular-nums;
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .kpi-unit {
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--accent);
    }
    .kpi-label {
      font-size: 1rem;
      font-weight: 600;
      color: #E2E8F0;
      margin-bottom: 6px;
    }
    .kpi-desc {
      font-size: 0.85rem;
      color: #94A3B8;
      line-height: 1.5;
    }

    /* 板块 3: 核心优势矩阵区 (6卡片) */
    .grid-3-col {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .matrix-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .matrix-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
    }
    .matrix-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: #EFF6FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 22px;
      transition: var(--transition);
    }
    .matrix-card:hover .matrix-icon {
      background: var(--accent);
      color: #FFFFFF;
    }
    .matrix-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .matrix-text {
      font-size: 0.95rem;
      color: var(--text-body);
      line-height: 1.7;
    }

    /* 板块 4: 热门社区产品与服务板块 (3大卡片横排) */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .service-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .service-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-5px);
    }
    .service-thumb {
      height: 220px;
      overflow: hidden;
      position: relative;
    }
    .service-thumb img {
      width: 100%;
      height: 100%;
      transition: transform 0.5s ease;
    }
    .service-card:hover .service-thumb img {
      transform: scale(1.05);
    }
    .service-badge {
      position: absolute;
      top: 16px;
      left: 16px;
      background: rgba(11, 30, 59, 0.85);
      backdrop-filter: blur(4px);
      color: #FFFFFF;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }
    .service-body {
      padding: 30px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .service-title {
      font-size: 1.35rem;
      font-weight: 750;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .service-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .feature-checklist {
      margin-bottom: 26px;
      flex: 1;
    }
    .checklist-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.92rem;
      color: var(--text-body);
      margin-bottom: 10px;
    }
    .check-icon {
      color: #10B981;
      font-weight: bold;
    }

    /* 板块 5: 结果对比 (对比我们 vs 传统) */
    .compare-container {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 22px 28px;
      border-bottom: 1px solid rgba(15, 82, 186, 0.06);
    }
    .compare-table th {
      background: #F1F5F9;
      font-size: 1.05rem;
      font-weight: 750;
      color: var(--text-main);
    }
    .compare-table th.highlight-col {
      background: #EFF6FF;
      color: var(--primary);
      border-left: 2px solid var(--primary);
      border-right: 2px solid var(--primary);
    }
    .compare-table td.highlight-col {
      background: rgba(239, 246, 255, 0.4);
      border-left: 2px solid var(--primary);
      border-right: 2px solid var(--primary);
      font-weight: 600;
      color: var(--text-main);
    }
    .compare-dim {
      font-weight: 600;
      color: var(--text-main);
      width: 25%;
    }
    .status-bad {
      color: #94A3B8;
    }
    .status-good {
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* 板块 6: 里程碑与理念区 (深色沉浸式横向流程) */
    .stepper-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
      margin-top: 40px;
    }
    .stepper-row::before {
      content: '';
      position: absolute;
      top: 36px;
      left: 10%;
      right: 10%;
      height: 2px;
      background: rgba(255, 255, 255, 0.15);
      z-index: 1;
    }
    .step-node {
      position: relative;
      z-index: 2;
      text-align: center;
      padding: 0 12px;
    }
    .step-circle {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      background: var(--bg-dark-card);
      border: 3px solid var(--accent);
      margin: 0 auto 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      font-weight: 800;
      color: #FFFFFF;
      box-shadow: 0 0 20px rgba(255, 94, 20, 0.3);
    }
    .step-name {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #FFFFFF;
    }
    .step-desc {
      font-size: 0.9rem;
      color: #9CA3AF;
      line-height: 1.6;
    }

    /* 板块 7: 用户运动故事与成长路径 */
    .story-card-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .story-img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      height: 380px;
    }
    .story-img-box img {
      width: 100%;
      height: 100%;
    }
    .story-content-box {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .quote-badge {
      font-size: 2.8rem;
      line-height: 1;
      color: var(--accent);
      font-family: Georgia, serif;
    }
    .story-quote {
      font-size: 1.18rem;
      font-weight: 600;
      color: var(--text-main);
      line-height: 1.7;
    }
    .story-detail {
      font-size: 0.95rem;
      color: var(--text-body);
      line-height: 1.8;
    }
    .author-meta {
      margin-top: 10px;
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .author-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }
    .author-name {
      font-weight: 700;
      color: var(--text-main);
    }
    .author-role {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 板块 8: 评价墙 (3列网格) */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .review-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .stars-row {
      color: #F59E0B;
      font-size: 1.1rem;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }
    .review-body {
      font-size: 0.96rem;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 20px;
      flex: 1;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(15, 82, 186, 0.06);
      padding-top: 16px;
    }
    .review-author-title {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .review-author-sub {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 板块 9: 体育社区动态与资讯区 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .news-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }
    .news-thumb {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .news-thumb img {
      width: 100%;
      height: 100%;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-thumb img {
      transform: scale(1.06);
    }
    .news-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .news-date {
      font-size: 0.82rem;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.45;
      margin-bottom: 12px;
    }
    .news-title:hover {
      color: var(--primary);
    }
    .news-summary {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    /* 板块 10: 平台保障与技术服务专栏 (4列横向轻量图标列表) */
    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .security-card {
      background: #FFFFFF;
      padding: 30px 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }
    .security-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }
    .security-icon {
      width: 58px;
      height: 58px;
      margin: 0 auto 18px;
      border-radius: 50%;
      background: #EFF6FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
    }
    .security-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .security-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 11: 常见问题解答（手风琴 FAQ） */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item:hover {
      border-color: rgba(15, 82, 186, 0.25);
    }
    .faq-question {
      padding: 20px 26px;
      font-size: 1.05rem;
      font-weight: 650;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.3s ease;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #FAFCFF;
      font-size: 0.95rem;
      color: var(--text-body);
      line-height: 1.8;
      padding: 0 26px;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 26px 22px 26px;
      border-top: 1px solid rgba(15, 82, 186, 0.05);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--accent);
    }

    /* 板块 12: 底部转化行动区 (CTA) */
    .cta-wrapper {
      background: linear-gradient(135deg, #0B192C 0%, #0F52BA 60%, #FF5E14 140%);
      border-radius: var(--radius-lg);
      padding: 60px 48px;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
      text-align: center;
    }
    .cta-title {
      font-size: 2.2rem;
      font-weight: 850;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .cta-desc {
      font-size: 1.05rem;
      color: rgba(255, 255, 255, 0.9);
      max-width: 680px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .cta-form {
      max-width: 640px;
      margin: 0 auto;
      display: flex;
      gap: 12px;
      background: rgba(255, 255, 255, 0.12);
      backdrop-filter: blur(8px);
      padding: 8px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.25);
    }
    .cta-input {
      flex: 1;
      border: none;
      padding: 12px 18px;
      font-size: 0.95rem;
      color: #FFFFFF;
      background: transparent;
    }
    .cta-input::placeholder {
      color: rgba(255, 255, 255, 0.65);
    }
    .cta-submit {
      padding: 12px 30px;
      font-weight: 700;
      font-size: 0.98rem;
    }

    /* Footer 综合页脚 */
    .site-footer {
      background: #080D14;
      color: #94A3B8;
      font-size: 0.9rem;
      padding-top: 70px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 50px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .footer-brand-title {
      font-size: 1.3rem;
      font-weight: 800;
      color: #FFFFFF;
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 16px;
    }
    .footer-desc {
      line-height: 1.8;
      color: #64748B;
      margin-bottom: 20px;
    }
    .footer-heading {
      font-size: 1.05rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }
    .footer-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-link:hover {
      color: #FFFFFF;
      transform: translateX(3px);
    }
    .footer-contact-item {
      display: flex;
      gap: 10px;
      margin-bottom: 12px;
      line-height: 1.6;
    }
    .footer-bottom {
      padding: 26px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
      color: #64748B;
    }
    .footer-domain {
      color: #94A3B8;
      font-weight: 600;
    }

    /* 移动端汉堡切换 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      width: 44px;
      height: 44px;
      align-items: center;
      justify-content: center;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .grid-3-col, .service-grid, .review-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .security-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-h1 {
        font-size: 2.3rem;
      }
      .stepper-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
      }
      .stepper-row::before {
        display: none;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .menu-toggle {
        display: flex;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--border-color);
        gap: 18px;
        align-items: flex-start;
      }
      .nav-menu.open {
        display: flex;
      }
      .nav-actions {
        display: none;
      }
      .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .kpi-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      }
      .story-card-wrap {
        grid-template-columns: 1fr;
      }
      .story-img-box {
        height: 240px;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .section-block {
        padding: 60px 0;
      }
      .cta-wrapper {
        padding: 40px 24px;
      }
      .cta-form {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 520px) {
      .grid-3-col, .service-grid, .review-grid, .news-grid, .security-grid, .kpi-grid, .stepper-row {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 1.85rem;
      }
      .hero-search-box {
        padding: 6px 8px 6px 14px;
      }
      .hero-search-input {
        font-size: 0.9rem;
      }
      .btn {
        width: 100%;
      }
    }