/* roulang page: index */
:root {
      --primary: #C45A3C;
      --primary-hover: #A84A2E;
      --gold: #D4A853;
      --gold-light: #E0B96C;
      --charcoal: #1E1E1E;
      --warm-bg: #F7F4EF;
      --white: #FFFFFF;
      --blue-accent: #2C5F7C;
      --border-light: rgba(255,255,255,0.3);
      --shadow-card: 0 4px 20px rgba(30,30,30,0.06);
      --shadow-card-hover: 0 8px 30px rgba(196,90,60,0.12);
      --radius-card-lg: 20px;
      --radius-card: 16px;
      --radius-btn: 12px;
      --radius-input: 8px;
      --glass-bg: rgba(255,255,255,0.6);
      --glass-bg-solid: rgba(247,244,239,0.95);
      --transition: all 0.3s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--warm-bg);
      color: var(--charcoal);
      line-height: 1.8;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4 {
      font-family: 'PingFang SC Heavy', 'Microsoft YaHei Bold', 'Inter', system-ui, sans-serif;
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 2rem;
      padding-right: 2rem;
    }
    @media (max-width: 768px) {
      .container {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
      }
    }
    /* 玻璃导航 */
    .glass-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      transition: background 0.3s, box-shadow 0.3s;
    }
    .glass-nav.scrolled {
      background: var(--glass-bg-solid);
      box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--charcoal);
      transition: color 0.2s;
      text-decoration: none;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.75rem 1.75rem;
      font-weight: 600;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
      text-decoration: none;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      transform: scale(1.02);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-btn);
      padding: 0.75rem 1.75rem;
      font-weight: 600;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
      cursor: pointer;
      text-decoration: none;
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }
    .btn-gold {
      background: var(--gold);
      color: var(--charcoal);
      border-radius: var(--radius-btn);
      padding: 0.75rem 2rem;
      font-weight: 700;
      transition: var(--transition);
      border: none;
      cursor: pointer;
      display: inline-block;
      text-align: center;
      text-decoration: none;
    }
    .btn-gold:hover {
      background: var(--gold-light);
      transform: scale(1.02);
    }
    .card-hover {
      transition: transform 0.25s, box-shadow 0.3s, border-color 0.2s;
      border: 1px solid transparent;
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
      border-color: rgba(196,90,60,0.3);
    }
    .highlight-card:hover img {
      transform: scale(1.04);
    }
    .highlight-card img {
      transition: transform 0.4s ease;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease-in-out;
    }
    .accordion-content.open {
      max-height: 200px;
    }
    .decor-line {
      width: 4px;
      height: 24px;
      background: var(--primary);
      border-radius: 2px;
      margin-right: 12px;
    }
    @media (max-width: 768px) {
      .mobile-menu {
        display: none;
        flex-direction: column;
        background: var(--glass-bg-solid);
        backdrop-filter: blur(20px);
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        padding: 1.5rem;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }
      .mobile-menu.active {
        display: flex;
      }
      .nav-link-mobile {
        padding: 0.75rem 0;
        font-size: 16px;
        border-bottom: 1px solid rgba(0,0,0,0.05);
      }
    }