/* roulang page: index */
:root {
      --primary: #8a6de9;
      --primary-soft: #c3b1f7;
      --primary-deep: #5a3fb0;
      --accent: #f7b05e;
      --accent-glow: #ffe9c4;
      --bg-light: #fdfbff;
      --bg-soft: #f3effc;
      --bg-card: #ffffff;
      --text-main: #2e2a3c;
      --text-soft: #5e5873;
      --text-muted: #8b8599;
      --border-light: #e6e0f2;
      --border-card: rgba(138, 109, 233, 0.15);
      --shadow-sm: 0 8px 20px rgba(138, 109, 233, 0.08);
      --shadow-card: 0 20px 35px rgba(90, 63, 176, 0.08);
      --shadow-glow: 0 0 18px rgba(247, 176, 94, 0.5);
      --radius-md: 1.25rem;
      --radius-lg: 2rem;
      --radius-btn: 3rem;
      --transition: 0.25s ease-in-out;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.5;
      margin: 0;
      padding: 0;
      scroll-behavior: smooth;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      font-family: inherit;
    }
    /* 自定义导航 - 品牌活动风格 */
    .navbar-custom {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      box-shadow: 0 8px 28px rgba(90, 63, 176, 0.1);
      padding: 0.8rem 2rem;
      border-bottom: 1px solid rgba(138, 109, 233, 0.15);
      transition: all 0.3s;
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 1.8rem;
      letter-spacing: 1px;
      background: linear-gradient(135deg, var(--primary-deep), var(--primary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 0.3rem;
    }
    .navbar-brand i {
      background: none;
      -webkit-text-fill-color: var(--accent);
      font-size: 2rem;
      text-shadow: 0 0 8px var(--accent-glow);
    }
    .nav-link-custom {
      font-weight: 600;
      color: var(--text-soft) !important;
      margin: 0 0.4rem;
      padding: 0.5rem 1rem !important;
      border-radius: 2rem;
      transition: var(--transition);
      position: relative;
    }
    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: var(--primary-deep) !important;
      background: rgba(138, 109, 233, 0.08);
    }
    .btn-glow {
      background: var(--accent);
      border: none;
      color: #2e2a3c;
      font-weight: 700;
      padding: 0.7rem 2rem;
      border-radius: var(--radius-btn);
      box-shadow: 0 6px 18px rgba(247, 176, 94, 0.4);
      transition: 0.2s;
      letter-spacing: 0.5px;
      display: flex;
      align-items: center;
      gap: 0.4rem;
      white-space: nowrap;
    }
    .btn-glow:hover {
      background: #ffc278;
      box-shadow: 0 10px 24px rgba(247, 176, 94, 0.7);
      transform: translateY(-2px);
      color: #2e2a3c;
    }
    .btn-primary-soft {
      background: var(--primary);
      border: none;
      color: white;
      font-weight: 600;
      border-radius: 3rem;
      padding: 0.8rem 2.2rem;
      box-shadow: 0 10px 22px rgba(138, 109, 233, 0.3);
      transition: 0.2s;
    }
    .btn-primary-soft:hover {
      background: var(--primary-deep);
      box-shadow: 0 14px 28px rgba(90, 63, 176, 0.4);
      color: white;
      transform: scale(1.02);
    }
    .hero-section {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center 30%;
      position: relative;
      border-radius: 0 0 3rem 3rem;
      overflow: hidden;
      min-height: 85vh;
      display: flex;
      align-items: center;
    }
    .hero-overlay {
      background: linear-gradient(90deg, rgba(46,42,60,0.75) 0%, rgba(90,63,176,0.55) 100%);
      position: absolute;
      inset: 0;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      color: white;
      padding: 2rem;
    }
    .section-title {
      font-weight: 700;
      font-size: 2.4rem;
      letter-spacing: -0.5px;
      margin-bottom: 1.2rem;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -10px;
      left: 0;
      width: 60px;
      height: 4px;
      background: var(--accent);
      border-radius: 4px;
    }
    .card-custom {
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
      overflow: hidden;
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card);
      border-color: var(--primary-soft);
    }
    .badge-level {
      background: linear-gradient(145deg, #f7b05e, #ff8c42);
      color: white;
      font-weight: 700;
      padding: 0.3rem 1rem;
      border-radius: 20px;
      font-size: 0.8rem;
      letter-spacing: 0.4px;
    }
    .faq-accordion .accordion-button {
      font-weight: 600;
      background: white;
      border-radius: 1rem !important;
      box-shadow: none;
      border: 1px solid var(--border-light);
    }
    .faq-accordion .accordion-button:not(.collapsed) {
      background: var(--bg-soft);
      color: var(--primary-deep);
      box-shadow: none;
    }
    .footer-custom {
      background: #1e1b2c;
      color: #cfc8e6;
      padding: 3rem 2rem 1.5rem;
    }
    @media (max-width: 768px) {
      .navbar-custom {
        padding: 0.6rem 1rem;
      }
      .hero-section {
        min-height: 70vh;
        border-radius: 0 0 2rem 2rem;
      }
      .section-title {
        font-size: 2rem;
      }
    }