/* roulang page: index */
:root {
      --c-navy: #0f2b48;
      --c-deep: #0a192f;
      --c-primary: #0066cc;
      --c-primary-hover: #0052a3;
      --c-cyan: #00b4d8;
      --c-bg-light: #f5f8fb;
      --c-bg-white: #ffffff;
      --c-text-main: #243242;
      --c-text-muted: #617285;
      --c-border: #dbe4ed;
      --radius-sm: 4px;
      --radius-md: 6px;
      --shadow-sm: 0 4px 16px rgba(15, 43, 72, 0.05);
      --shadow-md: 0 6px 24px rgba(15, 43, 72, 0.08);
      --shadow-hover: 0 16px 36px rgba(15, 43, 72, 0.12);
      --transition-base: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--c-text-main);
      background-color: var(--c-bg-white);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--c-primary);
      text-decoration: none;
      transition: var(--transition-base);
    }
    a:hover, a:focus {
      color: var(--c-primary-hover);
      text-decoration: none;
    }

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

    /* 顶部服务规范栏 */
    .top-utility-bar {
      background-color: #eaf0f6;
      height: 38px;
      border-bottom: 1px solid var(--c-border);
      font-size: 12px;
      color: #5a6e82;
      display: flex;
      align-items: center;
    }
    .top-utility-bar .pulse-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: #10b981;
      margin-right: 8px;
      box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      animation: pulse-ring 2s infinite;
    }
    @keyframes pulse-ring {
      0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
      70% { box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
      100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }
    .top-utility-bar .links a {
      color: #5a6e82;
      margin-left: 18px;
    }
    .top-utility-bar .links a:hover {
      color: var(--c-primary);
    }

    /* 主导航 */
    .platform-header {
      background: var(--c-bg-white);
      box-shadow: 0 2px 12px rgba(15, 43, 72, 0.06);
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      font-size: 20px;
      font-weight: 700;
      color: var(--c-navy);
      letter-spacing: -0.5px;
    }
    .brand-logo svg {
      width: 28px;
      height: 28px;
      margin-right: 10px;
      fill: var(--c-primary);
    }
    .main-nav ul {
      list-style: none;
      display: flex;
      gap: 28px;
      margin: 0;
    }
    .main-nav a {
      font-size: 15px;
      font-weight: 600;
      color: var(--c-navy);
      position: relative;
      padding: 6px 0;
    }
    .main-nav a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--c-primary);
      transition: var(--transition-base);
    }
    .main-nav a:hover::after, .main-nav a.active::after {
      width: 100%;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 600;
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      transition: var(--transition-base);
      cursor: pointer;
      border: 1px solid transparent;
      text-align: center;
    }
    .btn-ghost {
      border-color: var(--c-border);
      color: var(--c-navy);
      background: transparent;
    }
    .btn-ghost:hover {
      background: #edf3f9;
      border-color: #cbd7e4;
      color: var(--c-navy);
    }
    .btn-primary {
      background: var(--c-primary);
      color: #fff;
    }
    .btn-primary:hover {
      background: var(--c-primary-hover);
      color: #fff;
      box-shadow: 0 4px 14px rgba(0, 102, 204, 0.3);
    }
    .btn-outline-white {
      border-color: rgba(255, 255, 255, 0.4);
      color: #ffffff;
      background: transparent;
    }
    .btn-outline-white:hover {
      background: rgba(255, 255, 255, 0.15);
      border-color: #ffffff;
      color: #ffffff;
    }

    /* 板块通用布局 */
    .sec-block {
      padding: 88px 0;
      position: relative;
    }
    .sec-block.bg-light {
      background-color: var(--c-bg-light);
    }
    .sec-block.bg-deep {
      background-color: var(--c-deep);
      color: #e2e8f0;
    }
    .sec-block.bg-gradient-bar {
      background: linear-gradient(135deg, #eef5fc 0%, #e2edf8 100%);
      padding: 64px 0;
    }
    .sec-header {
      margin-bottom: 52px;
    }
    .sec-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.8px;
      padding: 4px 12px;
      border-radius: 50px;
      background-color: rgba(0, 102, 204, 0.1);
      color: var(--c-primary);
      margin-bottom: 12px;
    }
    .sec-badge.cyan {
      background-color: rgba(0, 180, 216, 0.15);
      color: var(--c-cyan);
    }
    .sec-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--c-navy);
      line-height: 1.35;
      margin-bottom: 14px;
    }
    .bg-deep .sec-title {
      color: #ffffff;
    }
    .sec-desc {
      font-size: 15px;
      color: var(--c-text-muted);
      line-height: 1.7;
      max-width: 820px;
      margin: 0;
    }
    .bg-deep .sec-desc {
      color: #94a3b8;
    }

    /* Hero 板块：左文右图 5:7 错位 */
    .hero-section {
      padding: 80px 0 100px;
      background: linear-gradient(180deg, #f0f6fc 0%, #ffffff 100%);
      overflow: hidden;
    }
    .hero-h1 {
      font-size: 38px;
      font-weight: 800;
      color: var(--c-navy);
      line-height: 1.28;
      margin-bottom: 20px;
    }
    .hero-intro {
      font-size: 15px;
      color: var(--c-text-muted);
      line-height: 1.75;
      margin-bottom: 32px;
    }
    .hero-kpis {
      display: flex;
      gap: 20px;
      margin-top: 36px;
      border-top: 1px solid var(--c-border);
      padding-top: 24px;
    }
    .hero-kpi-item {
      flex: 1;
    }
    .hero-kpi-val {
      font-size: 24px;
      font-weight: 700;
      color: var(--c-primary);
      display: block;
      line-height: 1.2;
    }
    .hero-kpi-lbl {
      font-size: 13px;
      color: var(--c-text-muted);
    }
    .hero-stage {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      background: #000;
    }
    .hero-stage img {
      width: 100%;
      height: 440px;
      object-fit: cover;
      opacity: 0.95;
    }
    .hero-floating-badge {
      position: absolute;
      bottom: 20px;
      right: 20px;
      background: rgba(15, 43, 72, 0.88);
      backdrop-filter: blur(8px);
      padding: 12px 20px;
      border-radius: var(--radius-sm);
      color: #fff;
      border: 1px solid rgba(255, 255, 255, 0.15);
      font-size: 13px;
    }

    /* 卡片通用交互 */
    .ui-card {
      background: var(--c-bg-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      padding: 28px;
      transition: var(--transition-base);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .ui-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #cbd8e6;
    }

    /* 参数表样式 */
    .specs-table-wrapper {
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      background: #fff;
    }
    .specs-table {
      width: 100%;
      margin: 0;
      border-collapse: collapse;
    }
    .specs-table th {
      background: #eaf2f9;
      color: var(--c-navy);
      font-weight: 700;
      padding: 14px 20px;
      font-size: 14px;
      border-bottom: 1px solid var(--c-border);
      text-align: left;
    }
    .specs-table td {
      padding: 14px 20px;
      font-size: 14px;
      color: var(--c-text-main);
      border-bottom: 1px solid #edf2f7;
    }
    .specs-table tr:last-child td {
      border-bottom: none;
    }

    /* 流程图样式 */
    .process-card {
      position: relative;
      background: #fff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      height: 100%;
    }
    .process-step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--c-primary);
      color: #fff;
      font-weight: 700;
      font-size: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }

    /* 手风琴 FAQ */
    .faq-accordion .accordion-item {
      border: 1px solid var(--c-border);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      background: #fff;
      overflow: hidden;
    }
    .faq-accordion .accordion-title {
      font-size: 16px;
      font-weight: 600;
      color: var(--c-navy);
      padding: 18px 24px;
      display: block;
      border: none;
      background: #fff;
      transition: var(--transition-base);
    }
    .faq-accordion .accordion-title:hover {
      background: #f7fafc;
      color: var(--c-primary);
    }
    .faq-accordion .accordion-content {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--c-text-muted);
      border: none;
      line-height: 1.7;
    }

    /* 合作伙伴 Logo */
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .partner-item {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-sm);
      padding: 20px;
      text-align: center;
      font-size: 14px;
      font-weight: 600;
      color: #526377;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition-base);
    }
    .partner-item:hover {
      border-color: var(--c-primary);
      color: var(--c-primary);
    }

    /* 页脚 */
    .platform-footer {
      background: var(--c-navy);
      color: #94a3b8;
      padding: 72px 0 28px;
      font-size: 14px;
    }
    .platform-footer h5 {
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #94a3b8;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      margin-top: 48px;
      padding-top: 24px;
      font-size: 13px;
      text-align: center;
      color: #64748b;
    }

    /* 移动端菜单响应式控制 */
    @media (max-width: 1023px) {
      .main-nav {
        display: none;
      }
      .mobile-toggle {
        display: block !important;
      }
      .hero-h1 {
        font-size: 28px;
      }
      .sec-block {
        padding: 56px 0;
      }
      .partner-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }
    .mobile-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--c-navy);
      margin: 5px 0;
    }
    .mobile-drawer {
      display: none;
      background: #fff;
      border-bottom: 1px solid var(--c-border);
      padding: 16px 24px;
    }
    .mobile-drawer ul {
      list-style: none;
      margin: 0;
    }
    .mobile-drawer li {
      margin: 12px 0;
    }
    .mobile-drawer a {
      color: var(--c-navy);
      font-weight: 600;
      display: block;
    }