/* roulang page: index */
:root {
      --deep-brown: #1A0F0A;
      --dark-brown: #3D2B1F;
      --warm-gold: #C8A45C;
      --light-gold: #E0D3B8;
      --cream-white: #FDFBF7;
      --soft-white: #FFFFFF;
      --text-dark: #2C2C2C;
      --text-muted: #5A5A5A;
      --border-light: rgba(200, 164, 92, 0.25);
      --shadow-sm: 0 8px 24px rgba(0,0,0,0.06);
      --shadow-hover: 0 16px 32px rgba(0,0,0,0.12);
      --border-radius-card: 20px;
      --border-radius-btn: 50px;
      --border-radius-sm: 12px;
      --transition: all 0.3s ease;
      --font-serif: 'Noto Serif SC', 'Times New Roman', serif;
      --font-sans: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--cream-white);
      color: var(--text-dark);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4, .serif {
      font-family: var(--font-serif);
      font-weight: 700;
      letter-spacing: -0.5px;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .section-padding {
      padding: 100px 0;
    }
    
    @media (max-width: 768px) {
      .section-padding {
        padding: 60px 0;
      }
    }

    /* 卡片化导航面板 */
    .navbar-custom {
      background: rgba(253, 251, 247, 0.92);
      backdrop-filter: blur(12px);
      border-radius: 20px;
      margin: 20px auto;
      max-width: 1140px;
      box-shadow: 0 12px 28px rgba(0,0,0,0.05);
      border: 1px solid var(--border-light);
      padding: 10px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    
    .nav-logo {
      font-family: var(--font-serif);
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--deep-brown);
      letter-spacing: 1px;
    }
    .nav-logo span {
      color: var(--warm-gold);
    }
    
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }
    
    .nav-item-custom {
      background: transparent;
      border-radius: 12px;
      padding: 8px 18px;
      color: var(--text-dark);
      font-weight: 500;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .nav-item-custom:hover {
      background: rgba(200, 164, 92, 0.12);
      color: var(--deep-brown);
      border-color: var(--light-gold);
    }
    
    .nav-cta-btn {
      background: linear-gradient(135deg, #C8A45C 0%, #A8863D 100%);
      border: none;
      color: white;
      font-weight: 600;
      border-radius: 40px;
      padding: 10px 24px;
      margin-left: 12px;
      box-shadow: 0 6px 14px rgba(168, 134, 61, 0.3);
      transition: var(--transition);
      white-space: nowrap;
    }
    .nav-cta-btn:hover {
      filter: brightness(1.1);
      box-shadow: 0 8px 20px rgba(168, 134, 61, 0.45);
      color: white;
    }
    
    .navbar-toggler-custom {
      background: transparent;
      border: 1px solid var(--warm-gold);
      color: var(--warm-gold);
      padding: 6px 12px;
      border-radius: 10px;
    }
    
    @media (max-width: 992px) {
      .navbar-custom {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-menu {
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
        margin-top: 12px;
      }
      .nav-cta-btn {
        margin-left: 0;
        width: 100%;
        text-align: center;
      }
    }

    /* Hero */
    .hero-section {
      background: linear-gradient(0deg, rgba(26,15,10,0.7) 0%, rgba(61,43,31,0.65) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 100vh;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }
    
    .hero-title {
      font-size: 3.8rem;
      font-weight: 700;
      line-height: 1.2;
      text-shadow: 0 4px 20px rgba(0,0,0,0.5);
    }
    
    .hero-sub {
      font-size: 1.3rem;
      opacity: 0.9;
      max-width: 700px;
      margin: 24px 0 32px;
    }
    
    .btn-primary-gold {
      background: linear-gradient(135deg, #C8A45C 0%, #B8923A 100%);
      border: none;
      color: #1A0F0A;
      font-weight: 700;
      padding: 14px 40px;
      border-radius: 50px;
      font-size: 1.1rem;
      box-shadow: 0 10px 24px rgba(200, 164, 92, 0.4);
      transition: var(--transition);
      letter-spacing: 1px;
    }
    .btn-primary-gold:hover {
      filter: brightness(1.15);
      transform: translateY(-2px);
      box-shadow: 0 18px 32px rgba(168, 134, 61, 0.5);
      color: #1A0F0A;
    }
    
    .btn-outline-gold {
      border: 2px solid var(--warm-gold);
      color: var(--warm-gold);
      background: transparent;
      font-weight: 600;
      padding: 12px 32px;
      border-radius: 50px;
      transition: var(--transition);
    }
    .btn-outline-gold:hover {
      background: rgba(200, 164, 92, 0.15);
      color: #fff;
      border-color: #fff;
    }
    
    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.5rem;
      }
      .hero-sub {
        font-size: 1.1rem;
      }
    }

    /* 卡片系统 */
    .card-custom {
      background: var(--soft-white);
      border-radius: var(--border-radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border: 1px solid rgba(0,0,0,0.03);
      overflow: hidden;
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .card-img-top {
      height: 200px;
      object-fit: cover;
      border-radius: 16px 16px 0 0;
    }
    
    .badge-gold {
      background: rgba(200, 164, 92, 0.15);
      color: #6B4F1C;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 0.85rem;
    }
    
    .stat-badge {
      background: var(--deep-brown);
      color: var(--light-gold);
      border-radius: 40px;
      padding: 12px 28px;
      display: inline-flex;
      align-items: baseline;
      gap: 6px;
    }
    
    /* 手风琴 */
    .accordion-custom .accordion-button {
      background: #F4EFE6;
      color: var(--deep-brown);
      font-weight: 600;
      border-radius: 16px !important;
      box-shadow: none;
      padding: 18px 24px;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      background: var(--light-gold);
      color: #1A0F0A;
    }
    .accordion-custom .accordion-body {
      background: white;
      border-radius: 0 0 16px 16px;
      color: var(--text-dark);
    }
    
    footer {
      background: #1A0F0A;
      color: #E0D3B8;
    }