/* roulang page: index */
:root {
      --bg-base: #0F141C;
      --bg-container: #161D27;
      --bg-card: #1F2937;
      --bg-card-hover: #263344;
      --color-primary: #00D084;
      --color-primary-rgb: 0, 208, 132;
      --color-secondary: #38BDF8;
      --color-danger: #F43F5E;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --text-sub: #64748B;
      --border-color: #334155;
      --border-light: rgba(255, 255, 255, 0.08);
      --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-box: 0 10px 30px rgba(0, 0, 0, 0.35);
    }

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

    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: var(--font-family);
      line-height: 1.75;
      letter-spacing: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.25s ease-in-out;
    }
    a:hover {
      color: var(--color-primary);
    }

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

    /* 顶部实用条 */
    .top-utility-bar {
      background: #0B0E14;
      font-size: 0.82rem;
      color: var(--text-sub);
      border-bottom: 1px solid var(--border-light);
      padding: 0.4rem 0;
    }
    .status-pulse {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--color-primary);
      margin-right: 6px;
      box-shadow: 0 0 8px var(--color-primary);
      animation: pulseAnim 2s infinite;
    }
    @keyframes pulseAnim {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }

    /* 工具栏主导航 */
    .platform-navbar {
      background: rgba(22, 29, 39, 0.88);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1030;
      padding: 0.85rem 0;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.01em;
    }
    .brand-logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--color-primary), #059669);
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #0F141C;
      font-weight: 900;
      font-size: 1.1rem;
    }
    .nav-link-custom {
      color: var(--text-muted);
      font-size: 0.95rem;
      font-weight: 500;
      padding: 0.5rem 0.85rem !important;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
    }
    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: var(--text-main);
      background: rgba(255, 255, 255, 0.05);
    }
    .btn-brand-cta {
      background: var(--color-primary);
      color: #0B0E14;
      font-weight: 600;
      font-size: 0.9rem;
      padding: 0.55rem 1.25rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--color-primary);
      transition: all 0.25s ease-in-out;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
    }
    .btn-brand-cta:hover {
      background: #05e693;
      color: #0B0E14;
      box-shadow: 0 0 16px rgba(0, 208, 132, 0.4);
      transform: translateY(-1px);
    }
    .btn-brand-ghost {
      background: transparent;
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.9rem;
      padding: 0.55rem 1.25rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      transition: all 0.25s ease-in-out;
    }
    .btn-brand-ghost:hover {
      background: rgba(255, 255, 255, 0.06);
      color: var(--color-primary);
      border-color: var(--color-primary);
    }

    /* 板块通用标准 */
    .content-section {
      padding: 5rem 0;
      position: relative;
    }
    .content-section.section-alt {
      background-color: var(--bg-container);
    }
    .content-section.section-bordered {
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
    }
    .section-eyebrow {
      color: var(--color-primary);
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 0.5rem;
      display: block;
    }
    .section-title {
      color: var(--text-main);
      font-size: 2.1rem;
      font-weight: 700;
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 1rem;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1.02rem;
      line-height: 1.75;
      max-width: 820px;
      margin-bottom: 2.5rem;
    }

    /* 卡片系统覆写 */
    .custom-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      transition: all 0.25s ease-in-out;
      height: 100%;
      position: relative;
    }
    .custom-card:hover {
      background: var(--bg-card-hover);
      border-color: var(--color-primary);
      transform: translateY(-3px);
      box-shadow: 0 12px 24px rgba(0, 0, 0, 0.35);
    }

    /* 1. Hero 帮助中心与检索 */
    .hero-search-center {
      position: relative;
      background: radial-gradient(circle at 50% 20%, rgba(0, 208, 132, 0.08), transparent 70%),
                  linear-gradient(rgba(15, 20, 28, 0.85), rgba(15, 20, 28, 0.95)),
                  url('/assets/images/7a207c2710c65869.jpg') center/cover no-repeat;
      padding: 6.5rem 0 5rem;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-search-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 0.4rem 0.5rem 0.4rem 1.2rem;
      display: flex;
      align-items: center;
      box-shadow: var(--shadow-box);
      max-width: 720px;
      margin: 0 auto;
    }
    .hero-search-box input {
      background: transparent;
      border: none;
      color: var(--text-main);
      font-size: 1.05rem;
      width: 100%;
      outline: none;
    }
    .hero-search-box input::placeholder {
      color: var(--text-sub);
    }
    .hero-chips-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 0.5rem;
      margin-top: 1.25rem;
    }
    .hero-chip {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 0.3rem 0.85rem;
      font-size: 0.85rem;
      color: var(--text-muted);
      transition: all 0.2s ease;
    }
    .hero-chip:hover {
      background: rgba(0, 208, 132, 0.12);
      border-color: var(--color-primary);
      color: var(--color-primary);
    }

    /* 2. 入口搜索与快速接入 */
    .quick-entry-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 1.25rem;
    }
    .quick-entry-card {
      background: var(--bg-container);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.4rem;
      display: flex;
      align-items: center;
      gap: 1rem;
      transition: all 0.25s ease;
    }
    .quick-entry-card:hover {
      border-color: var(--color-secondary);
      background: var(--bg-card);
      transform: translateY(-2px);
    }
    .quick-entry-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: rgba(56, 189, 248, 0.1);
      color: var(--color-secondary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.2rem;
      flex-shrink: 0;
    }

    /* 3. 分类矩阵 */
    .matrix-icon-badge {
      width: 42px;
      height: 42px;
      border-radius: var(--radius-sm);
      background: rgba(0, 208, 132, 0.12);
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 1.2rem;
    }

    /* 4. 精选清单 (工具演示台 / 报告清单) */
    .feature-list-tag {
      background: rgba(255, 255, 255, 0.05);
      font-size: 0.75rem;
      padding: 0.2rem 0.5rem;
      border-radius: 4px;
      color: var(--color-secondary);
      border: 1px solid rgba(56, 189, 248, 0.2);
    }

    /* 5. 最新更新 / 架构演进 */
    .timeline-stream {
      border-left: 2px solid var(--border-color);
      padding-left: 1.75rem;
      margin-left: 0.75rem;
      position: relative;
    }
    .timeline-node {
      position: relative;
      margin-bottom: 2.25rem;
    }
    .timeline-node:last-child {
      margin-bottom: 0;
    }
    .timeline-node::before {
      content: "";
      position: absolute;
      left: -2.35rem;
      top: 0.35rem;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--bg-base);
      border: 3px solid var(--color-primary);
    }
    .timeline-date {
      font-size: 0.82rem;
      color: var(--color-secondary);
      font-family: monospace;
      margin-bottom: 0.25rem;
    }

    /* 6. 指标排行与数据对比 */
    .rank-bar-wrap {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 1.2rem;
      margin-bottom: 1rem;
    }
    .rank-bar-progress {
      height: 8px;
      background: #2D3748;
      border-radius: 4px;
      overflow: hidden;
      margin: 0.6rem 0;
    }
    .rank-bar-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    }

    /* 7. 实验室资源中心 */
    .resource-cover-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      height: 220px;
      position: relative;
    }
    .resource-cover-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .custom-card:hover .resource-cover-box img {
      transform: scale(1.04);
    }

    /* 8. 案例故事 */
    .case-card-meta {
      display: flex;
      gap: 1.2rem;
      margin-top: 1rem;
      padding-top: 1rem;
      border-top: 1px dashed var(--border-color);
      font-size: 0.85rem;
    }

    /* 9. 资深团队评价 */
    .quote-badge {
      font-size: 2.5rem;
      line-height: 1;
      color: rgba(0, 208, 132, 0.2);
      font-family: Georgia, serif;
    }

    /* 10. 资讯专栏 */
    .news-card-thumb {
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 1rem;
      height: 170px;
    }
    .news-card-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* 11. 权威精选问答流 */
    .qa-block-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.4rem 1.6rem;
      margin-bottom: 1.25rem;
    }
    .qa-q-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: baseline;
      gap: 0.6rem;
      margin-bottom: 0.6rem;
    }
    .qa-q-mark {
      color: var(--color-primary);
      font-weight: 900;
      font-size: 1.1rem;
    }

    /* 12. 快速开始与收口行动 */
    .cta-banner-wrapper {
      background: linear-gradient(135deg, rgba(22, 29, 39, 0.95), rgba(31, 41, 55, 0.95)),
                  url('/assets/images/453a04906b7e894a.webp') center/cover no-repeat;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 3.5rem 2.5rem;
      box-shadow: var(--shadow-box);
    }
    .form-dark-control {
      background: rgba(15, 20, 28, 0.85);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      border-radius: var(--radius-sm);
      padding: 0.75rem 1rem;
    }
    .form-dark-control:focus {
      background: rgba(15, 20, 28, 0.95);
      border-color: var(--color-primary);
      color: var(--text-main);
      box-shadow: 0 0 0 0.25rem rgba(0, 208, 132, 0.15);
      outline: none;
    }
    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    .guarantee-icon {
      color: var(--color-primary);
      font-weight: bold;
      font-size: 1.1rem;
    }

    /* 页脚系统 */
    .site-footer {
      background: #0A0D13;
      border-top: 1px solid var(--border-color);
      padding: 4.5rem 0 2rem;
      color: var(--text-muted);
      font-size: 0.92rem;
    }
    .footer-col-title {
      color: var(--text-main);
      font-weight: 700;
      font-size: 1rem;
      margin-bottom: 1.25rem;
      letter-spacing: -0.01em;
    }
    .footer-link-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-link-list li {
      margin-bottom: 0.65rem;
    }
    .footer-link-list a {
      color: var(--text-muted);
    }
    .footer-link-list a:hover {
      color: var(--color-primary);
      padding-left: 3px;
    }
    .sub-footer {
      border-top: 1px solid var(--border-light);
      margin-top: 3.5rem;
      padding-top: 1.75rem;
      font-size: 0.85rem;
      color: var(--text-sub);
    }

    /* 响应式断点优化 */
    @media (max-width: 991px) {
      .section-title { font-size: 1.75rem; }
      .content-section { padding: 3.5rem 0; }
      .hero-search-center { padding: 4.5rem 0 3.5rem; }
    }
    @media (max-width: 767px) {
      .top-utility-bar { display: none; }
      .hero-search-box { flex-direction: column; gap: 0.75rem; padding: 0.75rem; }
      .hero-search-box input { width: 100%; text-align: center; }
      .btn-brand-cta, .btn-brand-ghost { width: 100%; justify-content: center; }
      .cta-banner-wrapper { padding: 2rem 1.25rem; }
      .case-card-meta { flex-direction: column; gap: 0.4rem; }
    }