/* roulang page: index */
:root {
      --u8-primary: #0f2b4b;
      --u8-secondary: #c8922b;
      --u8-accent: #e6b13e;
      --u8-bg-light: #f8f9fa;
      --u8-bg-soft: #f0f4f8;
      --u8-text-main: #1e293b;
      --u8-text-muted: #5f6b7a;
      --u8-white: #ffffff;
      --u8-border: #e2e8f0;
      --u8-radius-card: 20px;
      --u8-radius-btn: 40px;
      --u8-shadow-sm: 0 8px 20px rgba(0,0,0,0.04);
      --u8-shadow-md: 0 15px 35px rgba(0,0,0,0.08);
      --u8-font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
      background-color: var(--u8-white);
      color: var(--u8-text-main);
      line-height: 1.6;
      margin: 0;
      overflow-x: hidden;
    }

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

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

    /* 容器微调 */
    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* ------- 导航：分段标签风格 + 独立Logo ------- */
    .navbar-u8 {
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      box-shadow: var(--u8-shadow-sm);
      padding: 1rem 0;
      border-bottom: 1px solid rgba(0,0,0,0.02);
      position: sticky;
      top: 0;
      z-index: 1020;
    }

    .logo-brand {
      font-size: 1.9rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--u8-primary);
      display: flex;
      align-items: center;
      gap: 0.3rem;
    }
    .logo-brand i {
      color: var(--u8-secondary);
      font-size: 2rem;
    }
    .logo-brand span {
      background: linear-gradient(135deg, #0f2b4b 0%, #1e4a6b 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .nav-chips {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      flex-wrap: wrap;
    }

    .chip-tab {
      background: transparent;
      border: 1px solid var(--u8-border);
      color: var(--u8-text-main);
      padding: 0.5rem 1.3rem;
      border-radius: 40px;
      font-weight: 500;
      font-size: 0.95rem;
      transition: all 0.25s;
      white-space: nowrap;
    }

    .chip-tab:hover {
      background: var(--u8-bg-soft);
      border-color: var(--u8-secondary);
      color: var(--u8-primary);
    }

    .chip-tab.active {
      background: var(--u8-primary);
      border-color: var(--u8-primary);
      color: white;
      box-shadow: 0 6px 14px rgba(15,43,75,0.25);
    }

    .nav-cta-btn {
      background: var(--u8-secondary);
      color: white;
      border-radius: 40px;
      padding: 0.55rem 1.8rem;
      font-weight: 600;
      border: none;
      transition: 0.25s;
      box-shadow: 0 4px 12px rgba(200,146,43,0.3);
    }
    .nav-cta-btn:hover {
      background: #b07d1f;
      color: white;
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(200,146,43,0.45);
    }

    /* 移动端导航适配 */
    @media (max-width: 992px) {
      .navbar-u8 .container-custom {
        flex-wrap: wrap;
      }
      .nav-chips {
        gap: 0.4rem;
        margin-top: 0.8rem;
      }
      .chip-tab {
        padding: 0.4rem 1rem;
        font-size: 0.85rem;
      }
    }

    /* ------- Hero 使用 backpic 背景 ------- */
    .hero-section {
      background: linear-gradient(103deg, rgba(15,43,75,0.82) 0%, rgba(10,25,45,0.7) 100%), 
                  url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 85vh;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
      border-radius: 0 0 60px 60px;
      overflow: hidden;
    }

    .hero-content h1 {
      font-size: 3.6rem;
      font-weight: 700;
      letter-spacing: -0.8px;
      text-shadow: 0 8px 20px rgba(0,0,0,0.3);
      line-height: 1.2;
    }
    .highlight-gold {
      color: var(--u8-accent);
    }

    .timing-badge {
      background: rgba(255,255,255,0.12);
      backdrop-filter: blur(8px);
      border-radius: 40px;
      padding: 0.5rem 1.8rem;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      font-weight: 500;
      border: 1px solid rgba(255,255,255,0.25);
    }

    /* 卡片通用 */
    .card-u8 {
      background: white;
      border-radius: var(--u8-radius-card);
      box-shadow: var(--u8-shadow-sm);
      border: 1px solid var(--u8-border);
      transition: all 0.3s ease;
      overflow: hidden;
    }
    .card-u8:hover {
      transform: translateY(-6px);
      box-shadow: var(--u8-shadow-md);
    }

    .btn-u8-primary {
      background: var(--u8-secondary);
      border: none;
      color: white;
      font-weight: 600;
      border-radius: var(--u8-radius-btn);
      padding: 0.7rem 2rem;
      transition: 0.3s;
    }
    .btn-u8-primary:hover {
      background: #b8811f;
      color: white;
    }
    .btn-outline-u8 {
      border: 1.5px solid var(--u8-primary);
      color: var(--u8-primary);
      border-radius: 40px;
      font-weight: 600;
      padding: 0.6rem 1.9rem;
    }
    .btn-outline-u8:hover {
      background: var(--u8-primary);
      color: white;
    }

    .section-title {
      font-weight: 700;
      font-size: 2.4rem;
      margin-bottom: 1.2rem;
      color: var(--u8-primary);
    }

    .faq-accordion .accordion-button:not(.collapsed) {
      background-color: var(--u8-bg-soft);
      color: var(--u8-primary);
      font-weight: 600;
    }

    footer {
      background: #0b1e2f;
      color: #ccd6e0;
    }