/* roulang page: index */
:root {
      --primary: #0B5E3B;
      --primary-dark: #094D30;
      --accent-orange: #E67E22;
      --accent-gold: #F4D03F;
      --bg-warm: #FDFBF7;
      --bg-dark: #1A2E1F;
      --text-main: #1E2B1C;
      --text-light: #5A6B55;
      --white: #FFFFFF;
      --card-shadow: 0 4px 20px rgba(11,94,59,0.06);
      --card-shadow-hover: 0 8px 30px rgba(11,94,59,0.12);
      --border-light: rgba(11,94,59,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-chip: 20px;
      --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", sans-serif;
      --transition-smooth: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      transition: var(--transition-smooth);
    }

    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      background: rgba(253, 251, 247, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(11,94,59,0.08);
      padding: 12px 0;
      transition: background 0.3s;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: -0.3px;
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: var(--primary);
      mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M12 2L2 22h20L12 2zm0 4.5L18.5 20H5.5L12 6.5z"/></svg>') center/contain no-repeat;
      background: var(--primary);
      display: inline-block;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }

    .nav-chip {
      padding: 8px 16px;
      border-radius: var(--radius-chip);
      font-size: 0.875rem;
      font-weight: 500;
      color: var(--text-main);
      background: transparent;
      transition: var(--transition-smooth);
      white-space: nowrap;
    }

    .nav-chip:hover {
      background: rgba(11,94,59,0.05);
      color: var(--primary);
    }

    .nav-chip.active {
      background: rgba(11,94,59,0.1);
      color: var(--primary);
      font-weight: 600;
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 10px 22px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.9rem;
      border: none;
      box-shadow: 0 4px 12px rgba(11,94,59,0.25);
      letter-spacing: 0.3px;
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 6px 16px rgba(11,94,59,0.35);
      transform: translateY(-1px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 10px 22px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.9rem;
      letter-spacing: 0.3px;
    }

    .btn-outline:hover {
      background: rgba(11,94,59,0.05);
      transform: translateY(-1px);
    }

    .btn-accent {
      background: var(--accent-orange);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1rem;
      box-shadow: 0 4px 14px rgba(230,126,34,0.3);
    }

    .btn-accent:hover {
      background: #d4650f;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(230,126,34,0.4);
    }

    /* 区块间距 */
    section {
      padding: 80px 0;
      scroll-margin-top: 80px;
    }

    h1 {
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.02em;
      color: var(--text-main);
    }

    h2 {
      font-size: 2.2rem;
      font-weight: 600;
      line-height: 1.3;
      margin-bottom: 1rem;
    }

    h3 {
      font-size: 1.4rem;
      font-weight: 600;
      margin-bottom: 0.5rem;
    }

    .text-accent {
      color: var(--accent-orange);
    }

    .bg-primary {
      background-color: var(--primary);
    }

    .bg-dark {
      background-color: var(--bg-dark);
    }

    .card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-light);
      transition: var(--transition-smooth);
    }

    .card:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-4px);
      border-color: rgba(11,94,59,0.15);
    }

    .decor-leaf {
      position: absolute;
      opacity: 0.04;
      pointer-events: none;
      z-index: 0;
    }

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
    }

    @media (max-width: 768px) {
      h1 {
        font-size: 2.2rem;
      }
      h2 {
        font-size: 1.8rem;
      }
      .nav-links {
        display: none;
      }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: rgba(255,255,255,0.95);
        backdrop-filter: blur(20px);
        border-top: 1px solid var(--border-light);
        justify-content: space-around;
        padding: 10px 8px;
        z-index: 50;
      }
      .mobile-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        font-size: 0.7rem;
        color: var(--text-light);
      }
      .mobile-nav-item.active {
        color: var(--primary);
        font-weight: 600;
      }
      section {
        padding: 60px 0;
        scroll-margin-top: 70px;
      }
      .card:hover {
        transform: none;
      }
    }