/* roulang page: index */
:root {
      --c-primary: #0F172A;
      --c-blue: #2563EB;
      --c-blue-hover: #1D4ED8;
      --c-accent: #10B981;
      --c-purple: #6366F1;
      --c-bg: #F8FAFC;
      --c-card-bg: #FFFFFF;
      --c-dark-bg: #0B0F19;
      --c-text-main: #0F172A;
      --c-text-muted: #475569;
      --c-text-light: #94A3B8;
      --c-border: rgba(226, 232, 240, 0.9);
      --c-border-dark: #1E293B;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 14px;
      --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      --shadow-hover: 0 16px 32px -8px rgba(37, 99, 235, 0.12);
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    }

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

    body {
      font-family: var(--font-family);
      background-color: var(--c-bg);
      color: var(--c-text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.2s ease;
    }

    /* 顶部辅助条 */
    .top-bar {
      background-color: #050B14;
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid #1E293B;
      height: 38px;
      display: flex;
      align-items: center;
    }

    .pulse-indicator {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--c-accent);
      margin-right: 8px;
      box-shadow: 0 0 8px var(--c-accent);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.9); }
      100% { opacity: 1; transform: scale(1); }
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1020;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--c-border);
      transition: all 0.3s ease;
    }

    .navbar-brand {
      font-weight: 700;
      font-size: 1.35rem;
      color: var(--c-primary);
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .brand-icon {
      background: linear-gradient(135deg, var(--c-blue), var(--c-purple));
      color: #FFF;
      width: 38px;
      height: 38px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.15rem;
    }

    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: #334155;
      padding: 0.5rem 0.85rem !important;
      border-radius: var(--radius-sm);
    }

    .nav-link:hover, .nav-link.active {
      color: var(--c-blue);
      background-color: rgba(37, 99, 235, 0.05);
    }

    .search-pill {
      background: #F1F5F9;
      border: 1px solid #E2E8F0;
      border-radius: 20px;
      padding: 4px 12px;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.875rem;
    }

    .search-pill input {
      border: none;
      background: transparent;
      outline: none;
      font-size: 0.85rem;
      width: 140px;
    }

    .btn-custom-primary {
      background-color: var(--c-blue);
      color: #FFF;
      font-weight: 600;
      padding: 0.55rem 1.25rem;
      border-radius: var(--radius-sm);
      border: none;
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .btn-custom-primary:hover {
      background-color: var(--c-blue-hover);
      color: #FFF;
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(37, 99, 235, 0.35);
    }

    .btn-custom-outline {
      border: 1px solid #CBD5E1;
      background: #FFF;
      color: var(--c-primary);
      font-weight: 600;
      padding: 0.55rem 1.25rem;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
    }

    .btn-custom-outline:hover {
      background: #F8FAFC;
      border-color: #94A3B8;
      color: var(--c-primary);
    }

    /* Section通用定义 */
    .section-padding {
      padding: 85px 0;
    }

    .badge-soft {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(37, 99, 235, 0.08);
      color: var(--c-blue);
      border: 1px solid rgba(37, 99, 235, 0.2);
      font-size: 0.8125rem;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 30px;
      margin-bottom: 14px;
    }

    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--c-primary);
      line-height: 1.28;
      margin-bottom: 14px;
      letter-spacing: -0.02em;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--c-text-muted);
      line-height: 1.7;
      max-width: 760px;
      margin-bottom: 35px;
    }

    /* Hero区：自测选型问卷视觉 + 结果预览 */
    .hero-section {
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      padding: 70px 0 90px;
      border-bottom: 1px solid #E2E8F0;
    }

    .quiz-card {
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-md);
    }

    .quiz-option-group {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin: 20px 0;
    }

    .quiz-option-btn {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 18px;
      border: 1.5px solid #E2E8F0;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.2s ease;
      background: #FFF;
    }

    .quiz-option-btn:hover, .quiz-option-btn.active {
      border-color: var(--c-blue);
      background-color: rgba(37, 99, 235, 0.03);
    }

    .result-preview-box {
      background: #0F172A;
      color: #FFF;
      border-radius: var(--radius-lg);
      padding: 35px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
      overflow: hidden;
      border: 1px solid #1E293B;
    }

    .spec-matrix-mini {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin: 24px 0;
    }

    .spec-item {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 14px;
      border-radius: var(--radius-sm);
    }

    /* 数据指标条 */
    .metric-ticker-section {
      background: #0B0F19;
      color: #FFF;
      padding: 45px 0;
      border-bottom: 1px solid #1E293B;
    }

    .metric-value {
      font-size: 2.5rem;
      font-weight: 800;
      color: #38BDF8;
      font-feature-settings: "tnum";
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .metric-divider {
      border-right: 1px solid rgba(255, 255, 255, 0.12);
    }

    /* 卡片体系 */
    .base-card {
      background: var(--c-card-bg);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 28px;
      height: 100%;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      display: flex;
      flex-direction: column;
    }

    .base-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(37, 99, 235, 0.35);
    }

    .card-icon-wrap {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
    }

    .icon-blue { background: rgba(37, 99, 235, 0.1); color: var(--c-blue); }
    .icon-green { background: rgba(16, 185, 129, 0.1); color: var(--c-accent); }
    .icon-purple { background: rgba(99, 102, 241, 0.1); color: var(--c-purple); }

    /* 深色架构板块 */
    .dark-tech-section {
      background-color: var(--c-dark-bg);
      color: #F8FAFC;
      border-top: 1px solid #1E293B;
      border-bottom: 1px solid #1E293B;
    }

    .code-console-card {
      background: #020617;
      border: 1px solid #1E293B;
      border-radius: var(--radius-md);
      padding: 24px;
      font-family: monospace;
      font-size: 0.85rem;
      color: #94A3B8;
      line-height: 1.6;
    }

    /* 对比表格 */
    .comparison-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      background: #FFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--c-border);
    }

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #E2E8F0;
      vertical-align: middle;
    }

    .comparison-table th {
      background: #F8FAFC;
      font-weight: 700;
      color: var(--c-primary);
    }

    .comparison-table tr:last-child td {
      border-bottom: none;
    }

    .badge-checked {
      color: var(--c-accent);
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .badge-unchecked {
      color: #94A3B8;
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 资讯左图右文卡 */
    .media-card-h {
      display: flex;
      gap: 20px;
      background: #FFF;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 18px;
      height: 100%;
      align-items: center;
      transition: all 0.2s ease;
    }

    .media-card-h:hover {
      box-shadow: var(--shadow-sm);
      border-color: #CBD5E1;
      transform: translateY(-2px);
    }

    .media-card-h img {
      width: 130px;
      height: 95px;
      object-fit: cover;
      border-radius: var(--radius-sm);
      flex-shrink: 0;
    }

    /* FAQ 手风琴重构 */
    .accordion-item {
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md) !important;
      margin-bottom: 12px;
      overflow: hidden;
      background: #FFF;
    }

    .accordion-button {
      font-weight: 700;
      color: var(--c-primary);
      padding: 18px 24px;
      background: #FFF;
      box-shadow: none !important;
    }

    .accordion-button:not(.collapsed) {
      color: var(--c-blue);
      background: rgba(37, 99, 235, 0.03);
    }

    .accordion-body {
      padding: 18px 24px 24px;
      color: var(--c-text-muted);
      line-height: 1.7;
      font-size: 0.95rem;
    }

    /* 页脚 */
    .site-footer {
      background: #050B14;
      color: #94A3B8;
      padding: 70px 0 25px;
      border-top: 1px solid #1E293B;
      font-size: 0.875rem;
    }

    .footer-title {
      color: #F8FAFC;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }

    .footer-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .footer-list li {
      margin-bottom: 10px;
    }

    .footer-list a:hover {
      color: #38BDF8;
    }

    /* 移动端固定底栏 */
    .mobile-fixed-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(15, 23, 42, 0.96);
      backdrop-filter: blur(10px);
      border-top: 1px solid #1E293B;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 8px 16px;
      z-index: 1030;
    }

    @media (min-width: 768px) {
      .mobile-fixed-bar {
        display: none !important;
      }
    }

    @media (max-width: 767px) {
      .metric-divider {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        padding-bottom: 20px;
        margin-bottom: 20px;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .media-card-h {
        flex-direction: column;
        align-items: flex-start;
      }
      .media-card-h img {
        width: 100%;
        height: 140px;
      }
    }