/* roulang page: index */
:root {
      --primary: #C2410C;
      --primary-deep: #9A3412;
      --primary-light: #FFF7ED;
      --accent: #0D9488;
      --dark: #1E293B;
      --soft: #FAFAFA;
      --border-light: #E5E7EB;
      --text-muted: #94A3B8;
      --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.03);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -2px rgba(0,0,0,0.05);
      --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.08), 0 4px 10px -6px rgba(0,0,0,0.04);
      --radius-xl: 12px;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
      background-color: #FAFAFA;
      color: #0F172A;
      margin: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, textarea {
      font-family: inherit;
    }
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }
    @media (min-width: 768px) {
      .container-custom {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }
    /* 自定义动画 */
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(24px); }
      to { opacity: 1; transform: translateY(0); }
    }
    .animate-fade-in-up {
      animation: fadeInUp 0.7s ease forwards;
    }
    .animate-fade-in-up-delay-1 { animation-delay: 0.1s; opacity: 0; }
    .animate-fade-in-up-delay-2 { animation-delay: 0.2s; opacity: 0; }
    .animate-fade-in-up-delay-3 { animation-delay: 0.3s; opacity: 0; }
    .animate-fade-in-up-delay-4 { animation-delay: 0.4s; opacity: 0; }

    .scroll-reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s cubic-bezier(0.23, 1, 0.32, 1), transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
    }
    .scroll-reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    /* 导航模糊 */
    .nav-blur {
      background: rgba(255,255,255,0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
    }
    /* 移动端菜单 */
    .mobile-menu {
      transition: transform 0.3s ease, opacity 0.3s ease;
      transform: translateX(100%);
      opacity: 0;
    }
    .mobile-menu.open {
      transform: translateX(0);
      opacity: 1;
    }
    .hamburger-line {
      transition: all 0.3s ease;
    }
    .hamburger-open .line1 { transform: rotate(45deg) translate(5px, 5px); }
    .hamburger-open .line2 { opacity: 0; }
    .hamburger-open .line3 { transform: rotate(-45deg) translate(5px, -5px); }