/* roulang page: index */
@layer base {
      :root {
        --primary: #1A1A1A;
        --accent: #D4A853;
        --warm-light: #F5F0E8;
        --dark-bg: #2C2C2C;
        --border-soft: #E5E0D8;
        --page-bg: #FCFCF9;
        --card-bg: #FFFFFF;
        --radius-card: 8px;
        --shadow-card: 0 4px 12px rgba(0,0,0,0.03);
      }
      * {
        box-sizing: border-box;
      }
      body {
        font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, -apple-system, sans-serif;
        background-color: var(--page-bg);
        color: var(--primary);
        line-height: 1.6;
        margin: 0;
        -webkit-font-smoothing: antialiased;
      }
      h1, h2, h3, .font-serif {
        font-family: 'Georgia', 'Times New Roman', 'Songti SC', 'Noto Serif CJK SC', serif;
        font-weight: 600;
      }
      .container-main {
        max-width: 1280px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 1rem;
        padding-right: 1rem;
      }
      @media (min-width: 640px) {
        .container-main {
          padding-left: 1.5rem;
          padding-right: 1.5rem;
        }
      }
      @media (min-width: 1024px) {
        .container-main {
          padding-left: 2rem;
          padding-right: 2rem;
        }
      }
      .text-balance {
        text-wrap: balance;
      }
      .section-padding {
        padding-top: 4rem;
        padding-bottom: 4rem;
      }
      @media (min-width: 768px) {
        .section-padding {
          padding-top: 6rem;
          padding-bottom: 6rem;
        }
      }
      @media (min-width: 1024px) {
        .section-padding {
          padding-top: 8rem;
          padding-bottom: 8rem;
        }
      }
    }
    @layer components {
      .btn-primary {
        background-color: var(--accent);
        color: white;
        padding: 0.875rem 2rem;
        border-radius: 9999px;
        font-weight: 600;
        letter-spacing: 0.02em;
        transition: background-color 200ms, box-shadow 200ms;
        display: inline-block;
        text-align: center;
        box-shadow: 0 2px 8px rgba(212,168,83,0.2);
      }
      .btn-primary:hover {
        background-color: #C4963E;
        box-shadow: 0 8px 20px rgba(212,168,83,0.35);
      }
      .btn-outline {
        border: 2px solid var(--primary);
        color: var(--primary);
        padding: 0.875rem 2rem;
        border-radius: 9999px;
        font-weight: 600;
        transition: background-color 200ms, color 200ms;
        display: inline-block;
        text-align: center;
      }
      .btn-outline:hover {
        background-color: var(--primary);
        color: white;
      }
      .btn-outline-light {
        border: 2px solid white;
        color: white;
        padding: 0.875rem 2rem;
        border-radius: 9999px;
        font-weight: 600;
        transition: background-color 200ms, color 200ms;
        display: inline-block;
        text-align: center;
      }
      .btn-outline-light:hover {
        background-color: white;
        color: var(--primary);
      }
      .nav-link {
        color: var(--primary);
        font-weight: 500;
        font-size: 0.95rem;
        padding-bottom: 4px;
        transition: color 200ms, border-color 200ms;
        border-bottom: 2px solid transparent;
      }
      .nav-link:hover, .nav-link.active {
        color: var(--accent);
        border-bottom-color: var(--accent);
      }
      .card-hover {
        transition: transform 300ms ease, box-shadow 300ms ease, border-color 300ms ease;
        border: 1px solid var(--border-soft);
        background: white;
      }
      .card-hover:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 28px rgba(0,0,0,0.05);
        border-color: var(--accent);
      }
      .decor-line {
        width: 48px;
        height: 4px;
        background-color: var(--accent);
        display: block;
        margin-bottom: 1.5rem;
      }
      .bg-dot-pattern {
        background-image: radial-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
        background-size: 24px 24px;
      }
    }

/* 补充自定义样式，保证移动端汉堡菜单及细节 */
    body {
      background-color: #FCFCF9;
    }
    .backdrop-blur-nav {
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      background-color: rgba(252, 252, 249, 0.8);
    }
    @media (max-width: 767px) {
      .mobile-menu {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        height: calc(100vh - 64px);
        background: #FCFCF9;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2.5rem;
        z-index: 40;
        font-size: 1.5rem;
      }
      .mobile-menu.open {
        display: flex;
      }
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details summary {
      list-style: none;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 350ms ease;
    }
    details[open] .faq-answer {
      max-height: 300px;
    }
    details .faq-icon::after {
      content: "+";
      font-size: 1.5rem;
      font-weight: 300;
      transition: transform 300ms ease;
      display: inline-block;
    }
    details[open] .faq-icon::after {
      content: "−";
      transform: rotate(180deg);
    }