/* roulang page: index */
:root {
      --orange: #E85D04;
      --deep: #3E2723;
      --warm-bg: #FFFBF0;
      --lime: #84CC16;
      --text-brown: #4E342E;
      --text-light-brown: #5D4037;
      --border-light: rgba(232, 93, 4, 0.15);
      --shadow-card: 0 12px 25px -8px rgba(232, 93, 4, 0.12);
      --shadow-card-hover: 0 25px 35px -12px rgba(232, 93, 4, 0.22);
      --radius-card: 24px;
      --radius-btn: 9999px;
    }
    * {
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: #FFFBF0;
      color: #4E342E;
      line-height: 1.6;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    @media (min-width: 768px) {
      .container {
        padding-left: 2.5rem;
        padding-right: 2.5rem;
      }
    }
    /* 导航栏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      transition: background-color 0.3s, backdrop-filter 0.3s, box-shadow 0.3s;
    }
    .header.scrolled {
      background-color: rgba(255, 251, 240, 0.85);
      backdrop-filter: blur(10px);
      box-shadow: 0 4px 20px rgba(62, 39, 35, 0.08);
    }
    .nav-link {
      color: #3E2723;
      font-weight: 500;
      transition: color 0.2s;
      padding: 0.5rem 0.75rem;
      border-radius: 0.5rem;
    }
    .nav-link:hover {
      color: #E85D04;
    }
    .btn-primary {
      background-color: #E85D04;
      color: white;
      font-weight: 600;
      border-radius: 9999px;
      padding: 0.6rem 2rem;
      transition: all 0.25s;
      box-shadow: 0 6px 16px rgba(232, 93, 4, 0.35);
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background-color: #c94d02;
      transform: scale(1.02);
      box-shadow: 0 10px 22px rgba(232, 93, 4, 0.5);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid #E85D04;
      color: #E85D04;
      font-weight: 600;
      border-radius: 9999px;
      padding: 0.6rem 2rem;
      transition: all 0.25s;
      display: inline-block;
    }
    .btn-outline:hover {
      background-color: #E85D04;
      color: white;
    }
    /* 卡片效果 */
    .card-hover {
      transition: transform 0.3s, box-shadow 0.3s;
      background: white;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
    }
    .card-hover:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
    }
    /* 数据徽章 */
    .badge-lime {
      background-color: rgba(132, 204, 22, 0.12);
      color: #3E2723;
      font-weight: 800;
      border-radius: 40px;
      padding: 0.3rem 1.2rem;
      display: inline-block;
    }
    .stat-number {
      font-weight: 900;
      font-size: 2rem;
      color: #E85D04;
      line-height: 1.2;
    }
    /* 手风琴FAQ */
    .faq-item {
      border-left: 4px solid #E85D04;
      background: white;
      border-radius: 0 20px 20px 0;
      transition: background 0.2s;
    }
    .faq-answer {
      background-color: #FFF9F0;
    }
    /* 背景图区域 */
    .hero-bg {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero-overlay {
      background: linear-gradient(90deg, rgba(255,251,240,0.9) 40%, rgba(255,251,240,0.7) 70%);
    }
    /* 移动端菜单 */
    .mobile-menu {
      display: none;
    }
    @media (max-width: 767px) {
      .desktop-nav {
        display: none;
      }
      .mobile-menu {
        display: block;
      }
    }