/* roulang page: index */
:root {
      --primary-deep: #1E1E1E;
      --accent-lime: #A3E635;
      --bg-warm: #FAFAF9;
      --bg-light-gray: #F3F4F6;
      --bg-dark: #0A0A0A;
      --text-muted: #4b5563;
      --border-light: #e5e7eb;
      --radius-card: 1rem;
      --radius-btn: 9999px;
      --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.03);
      --shadow-md: 0 4px 12px rgba(0,0,0,0.05);
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
      background-color: var(--bg-warm);
      color: var(--primary-deep);
      margin: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      display: block;
    }
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    @media (min-width: 768px) {
      .container-custom {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }
    /* 自定义动画 */
    @keyframes float {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-12px); }
      100% { transform: translateY(0px); }
    }
    .animate-float {
      animation: float 6s ease-in-out infinite;
    }
    /* 磨砂导航 */
    .glass-nav {
      background: rgba(255, 255, 255, 0.75);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255,255,255,0.6);
      box-shadow: 0 4px 16px rgba(0,0,0,0.04);
    }
    /* 装饰线条 */
    .decor-line {
      width: 60px;
      height: 4px;
      background-color: var(--accent-lime);
      margin-top: 0.5rem;
      margin-bottom: 1.5rem;
    }
    /* FAQ 手风琴过渡 */
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease-in-out, padding 0.3s;
    }
    .faq-item.active .faq-content {
      max-height: 300px;
      padding-top: 0.75rem;
    }
    .faq-item.active .faq-border {
      border-left-color: var(--accent-lime);
    }
    /* 卡片悬停效果 */
    .card-hover-img img {
      transition: transform 0.7s ease;
    }
    .card-hover-img:hover img {
      transform: scale(1.05);
    }
    .overlay-gradient {
      background: linear-gradient(180deg, rgba(0,0,0,0) 60%, rgba(0,0,0,0.5) 100%);
      transition: opacity 0.4s;
    }
    .card-hover-img:hover .overlay-gradient {
      opacity: 0.9;
    }
    /* 按钮动效 */
    .btn-primary {
      background-color: var(--accent-lime);
      color: var(--primary-deep);
      transition: all 0.3s ease;
      box-shadow: 0 2px 6px rgba(163, 230, 53, 0.3);
    }
    .btn-primary:hover {
      background-color: #b2f04a;
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(163, 230, 53, 0.4);
    }
    .btn-outline {
      border: 1.5px solid var(--primary-deep);
      color: var(--primary-deep);
      background: transparent;
      transition: all 0.3s ease;
    }
    .btn-outline:hover {
      background-color: var(--primary-deep);
      color: white;
      transform: translateY(-2px);
    }
    input:focus, button:focus {
      outline: 2px solid var(--accent-lime);
      outline-offset: 2px;
    }
    /* 移动端菜单 */
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(255,255,255,0.98);
      backdrop-filter: blur(12px);
      z-index: 100;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2rem;
    }
    .mobile-menu.active {
      display: flex;
    }