/* roulang page: index */
:root {
      --primary: #0B3D2E;
      --primary-deep: #0B2B22;
      --accent: #E85D04;
      --accent-hover: #C94D00;
      --bg: #F9FAFB;
      --card-bg: #FFFFFF;
      --text-main: #1F2937;
      --text-muted: #6B7280;
      --border: #E5E7EB;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-container: 16px;
      --shadow-card: 0 1px 3px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.1);
      --glass-bg: rgba(255,255,255,0.15);
      --glass-blur: blur(12px);
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", "SF Pro Display", system-ui, sans-serif;
      background-color: var(--bg);
      color: var(--text-main);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      transition: all 0.2s ease;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 导航样式 */
    .glass-nav {
      background: rgba(255,255,255,0.15);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      border-bottom: 1px solid rgba(255,255,255,0.2);
      transition: background 0.3s, box-shadow 0.3s;
      z-index: 50;
    }
    .nav-scrolled {
      background: var(--primary) !important;
      box-shadow: 0 2px 8px rgba(0,0,0,0.15) !important;
      border-bottom: none;
    }
    .nav-link {
      color: white;
      font-weight: 500;
      transition: color 0.15s;
    }
    .nav-link:hover {
      color: var(--accent);
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      border-radius: var(--radius-btn);
      padding: 10px 22px;
      font-weight: 600;
      display: inline-block;
      border: none;
      transition: background 0.2s, transform 0.2s;
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      transform: scale(1.02);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-btn);
      padding: 10px 22px;
      font-weight: 600;
      display: inline-block;
      transition: background 0.2s;
    }
    .btn-outline:hover {
      background: rgba(11,61,46,0.1);
    }
    .btn-light {
      background: white;
      color: var(--primary);
      border-radius: var(--radius-btn);
      padding: 10px 22px;
      font-weight: 600;
      border: none;
    }
    /* 卡片与容器 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      border: 1px solid var(--border);
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .accent-border-left {
      border-left: 4px solid var(--primary);
    }
    /* 手风琴 */
    .faq-item {
      background: #F3F4F6;
      border-radius: 8px;
      margin-bottom: 8px;
    }
    .faq-question {
      padding: 16px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }
    .faq-answer {
      padding: 0 16px 16px;
      display: none;
      color: var(--text-main);
      background: white;
      border-radius: 0 0 8px 8px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }
    .faq-arrow {
      transition: transform 0.2s;
    }
    /* 装饰纹理 */
    .dot-pattern {
      background-image: radial-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
      background-size: 20px 20px;
    }
    /* 响应式调整 */
    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }
      h1 {
        font-size: 30px !important;
      }
      h2 {
        font-size: 26px !important;
      }
    }

@keyframes fadeInUp {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }
    .animate-fadeInUp {
      animation: fadeInUp 0.8s ease forwards;
    }