/* roulang page: index */
:root {
      --deep-blue: #0B1A2E;
      --gold: #D4AF37;
      --gold-dark: #B8962E;
      --surface-glass: rgba(15, 30, 50, 0.75);
      --text-primary: #FFFFFF;
      --text-body: #B0C4DE;
      --text-muted: #6A7F9B;
      --border-gold: rgba(212, 175, 55, 0.25);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --success: #00C896;
      --danger: #D64545;
      --radius-card: 20px;
      --radius-btn: 50px;
      --shadow-card: 0 12px 36px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(212, 175, 55, 0.18);
      --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }

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

    body {
      font-family: var(--font-sans);
      background: radial-gradient(circle at 30% 10%, #12273f, #0B1A2E 80%);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
    }

    a {
      color: var(--gold);
      text-decoration: none;
      transition: all 0.25s ease;
      position: relative;
    }

    a:hover {
      color: #e6c468;
    }

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

    h1, h2, h3, h4 {
      color: var(--text-primary);
      font-weight: 700;
      letter-spacing: -0.3px;
    }

    h2 {
      font-size: 2.5rem;
      margin-bottom: 1.25rem;
    }

    h3 {
      font-size: 1.4rem;
      margin-bottom: 0.6rem;
    }

    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 2rem;
    }

    /* 导航吸顶 */
    .navbar-custom {
      background: rgba(8, 20, 40, 0.85);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--border-gold);
      padding: 0.4rem 0;
      transition: all 0.3s;
      position: sticky;
      top: 0;
      z-index: 1020;
    }

    .navbar-brand {
      font-size: 1.8rem;
      font-weight: 800;
      background: linear-gradient(180deg, #f5e3a9 0%, #D4AF37 70%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
    }

    .nav-link-custom {
      color: var(--text-body) !important;
      font-weight: 500;
      margin: 0 0.5rem;
      padding: 0.5rem 1rem !important;
      border-radius: 30px;
      transition: 0.2s;
    }

    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: var(--gold) !important;
      background: rgba(212, 175, 55, 0.08);
    }

    .btn-primary-gold {
      background: linear-gradient(135deg, #D4AF37 0%, #B8962E 100%);
      border: none;
      color: #0B1A2E;
      font-weight: 700;
      padding: 0.7rem 2rem;
      border-radius: 50px;
      transition: 0.3s ease;
      box-shadow: 0 4px 12px rgba(212, 175, 55, 0.35);
      letter-spacing: 0.5px;
    }

    .btn-primary-gold:hover {
      background: #e6c468;
      box-shadow: 0 0 20px rgba(212, 175, 55, 0.6);
      transform: translateY(-2px);
      color: #0B1A2E;
    }

    .btn-outline-gold {
      background: transparent;
      border: 1.5px solid var(--gold);
      color: var(--gold);
      font-weight: 600;
      padding: 0.65rem 2rem;
      border-radius: 50px;
      transition: 0.3s;
    }

    .btn-outline-gold:hover {
      background: rgba(212, 175, 55, 0.12);
      color: #f0d97a;
      border-color: #e6c468;
    }

    /* Hero */
    .hero-section {
      min-height: 90vh;
      display: flex;
      align-items: center;
      position: relative;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(8, 18, 34, 0.7);
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 20% 30%, rgba(212,175,55,0.08) 0%, transparent 60%);
    }

    .hero-title {
      font-size: 3.6rem;
      font-weight: 800;
      line-height: 1.2;
    }

    .badge-gold {
      background: rgba(212, 175, 55, 0.15);
      color: var(--gold);
      padding: 0.35rem 1.2rem;
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      letter-spacing: 2px;
      display: inline-block;
      border: 1px solid var(--border-gold);
    }

    /* 统计卡片 */
    .stat-number {
      font-size: 2.7rem;
      font-weight: 800;
      color: var(--gold);
    }

    .glass-card {
      background: var(--surface-glass);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-gold);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: 0.35s ease;
      padding: 2rem 1.8rem;
    }

    .glass-card:hover {
      transform: translateY(-8px);
      border-color: rgba(212, 175, 55, 0.55);
      box-shadow: 0 18px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(212,175,55,0.4);
    }

    .icon-gold {
      color: var(--gold);
      font-size: 2.6rem;
      margin-bottom: 1.5rem;
    }

    .section-padding {
      padding: 5rem 0;
    }

    .timeline-step {
      background: var(--surface-glass);
      border-radius: 24px;
      padding: 2rem 1.5rem;
      border: 1px solid var(--border-subtle);
      position: relative;
    }

    .step-num {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--gold);
      opacity: 0.9;
    }

    .faq-item {
      background: rgba(15, 30, 50, 0.7);
      border: 1px solid var(--border-subtle);
      border-radius: 18px;
      margin-bottom: 1rem;
      transition: 0.2s;
    }

    .faq-item.active {
      border-color: var(--gold);
    }

    .faq-question {
      cursor: pointer;
      padding: 1.2rem 1.8rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-primary);
    }

    .footer-link {
      color: var(--text-body);
      transition: 0.2s;
    }

    .footer-link:hover {
      color: var(--gold);
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.6rem;
      }
      h2 {
        font-size: 2rem;
      }
      .navbar-brand {
        font-size: 1.5rem;
      }
    }