/* roulang page: index */
:root {
      --gold: #C8A96E;
      --gold-dark: #A6844C;
      --deep-green: #1E2F2B;
      --ivory: #F9F6F0;
      --light-gold: #E3D5C0;
      --burgundy: #7B2D3B;
      --text-dark: #3A3A3A;
      --card-bg: #F4F0EA;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --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 {
      margin: 0;
      font-family: var(--font-sans);
      background-color: #ffffff;
      color: var(--text-dark);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-serif);
      font-weight: 600;
      letter-spacing: -0.3px;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 2rem;
      padding-right: 2rem;
    }
    /* 导航固定模糊 */
    .nav-blur {
      background-color: rgba(30, 47, 43, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    /* 自定义下划线动画 */
    .nav-link {
      position: relative;
      transition: color 0.2s;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -4px;
      width: 0%;
      height: 2px;
      background-color: var(--gold);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    /* Mega面板 */
    .mega-panel {
      display: none;
      position: absolute;
      top: 100%;
      right: 0;
      background: white;
      border-radius: 16px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.15);
      padding: 1.8rem;
      width: 480px;
      z-index: 50;
    }
    .mega-trigger:hover .mega-panel {
      display: block;
    }
    /* 卡片样式 */
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.3s;
      position: relative;
      padding: 2rem 1.8rem;
      overflow: hidden;
    }
    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
    }
    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: var(--gold);
    }
    .service-card:hover::before {
      background: var(--gold-dark);
    }
    .card-number {
      font-family: var(--font-serif);
      font-size: 4rem;
      font-weight: 700;
      color: rgba(200,169,110,0.15);
      position: absolute;
      left: 1rem;
      top: 0.2rem;
      line-height: 1;
      pointer-events: none;
    }
    /* 证言卡片 */
    .testimonial-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 2rem;
      position: relative;
    }
    .quote-mark {
      position: absolute;
      left: 1.5rem;
      top: 0.8rem;
      font-size: 5rem;
      color: rgba(200,169,110,0.25);
      font-family: var(--font-serif);
      line-height: 1;
    }
    /* FAQ details */
    details.faq-item {
      border-bottom: 1px solid rgba(200,169,110,0.4);
      padding: 1.2rem 0;
    }
    details.faq-item summary {
      font-weight: 600;
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.1rem;
    }
    details.faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-icon {
      transition: transform 0.3s ease;
    }
    details[open] .faq-icon {
      transform: rotate(45deg);
    }
    /* 汉堡菜单 */
    #menu-toggle {
      display: none;
    }
    .mobile-menu {
      display: none;
    }
    @media (max-width: 768px) {
      .container {
        padding-left: 1.2rem;
        padding-right: 1.2rem;
      }
      h1 {
        font-size: 2.2rem !important;
      }
      h2 {
        font-size: 1.9rem !important;
      }
      .desktop-nav {
        display: none;
      }
      .mobile-menu {
        display: block;
      }
      #menu-toggle:checked ~ .mobile-nav {
        display: flex;
      }
      .mobile-nav {
        display: none;
        flex-direction: column;
        background: rgba(30,47,43,0.95);
        backdrop-filter: blur(20px);
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        padding: 1.5rem;
        z-index: 100;
      }
      .mega-panel {
        display: none !important;
      }
    }
    @media (min-width: 769px) {
      .mobile-menu, .mobile-nav {
        display: none;
      }
      .desktop-nav {
        display: flex;
      }
    }
    /* 其他补充 */
    .btn-primary {
      background-color: var(--gold);
      color: white;
      padding: 0.9rem 2.2rem;
      border-radius: var(--radius-btn);
      font-weight: 500;
      transition: all 0.25s;
      display: inline-block;
      text-align: center;
      letter-spacing: 0.5px;
      border: none;
    }
    .btn-primary:hover {
      background-color: var(--gold-dark);
      box-shadow: 0 8px 18px rgba(166,132,76,0.4);
      transform: scale(1.03);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid white;
      color: white;
      padding: 0.85rem 2rem;
      border-radius: var(--radius-btn);
      transition: 0.25s;
      font-weight: 500;
    }
    .btn-outline:hover {
      background: white;
      color: var(--deep-green);
    }