/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --sunrise-gold: #C5B89E;
      --sunrise-deep: #8C7A6B;
      --obsidian-black: #1A1A1A;
      --canvas-white: #FAFAF8;
      --pure-white: #FFFFFF;
      --soft-border: #E8E6E1;
      --text-mid: #4A4A4A;
      --text-light: #666666;
      --footer-bg: #1A1A1A;
      --footer-text: #B0B0B0;
      --radius-sm: 8px;
      --radius-full: 9999px;
      --shadow-subtle: 0px 4px 20px rgba(0,0,0,0.02);
      --shadow-hover: 0px 12px 30px rgba(0,0,0,0.04);
      --transition-smooth: cubic-bezier(0.25, 0.1, 0.25, 1.0);
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      background-color: var(--canvas-white);
      color: var(--obsidian-black);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4 {
      font-weight: 600;
      letter-spacing: -0.02em;
    }
    .font-display {
      font-family: 'Playfair Display', serif;
    }
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 2rem;
      padding-right: 2rem;
    }
    @media (max-width: 768px) {
      .container-custom {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
      }
    }
    /* 导航 SaaS 命令栏风格 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--soft-border);
      z-index: 50;
      transition: background 0.3s;
    }
    .nav-link {
      color: var(--text-mid);
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s;
      padding-bottom: 4px;
      border-bottom: 2px solid transparent;
    }
    .nav-link:hover {
      color: var(--obsidian-black);
    }
    .nav-link.active {
      color: var(--obsidian-black);
      border-bottom-color: var(--sunrise-gold);
    }
    .search-box {
      background: rgba(245, 245, 240, 0.7);
      border: 1px solid var(--soft-border);
      border-radius: var(--radius-full);
      padding: 0.5rem 1.2rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: var(--text-light);
      font-size: 0.9rem;
      transition: all 0.2s;
    }
    .search-box i {
      color: var(--sunrise-gold);
      font-size: 0.9rem;
    }
    .btn-primary {
      background: var(--sunrise-gold);
      color: var(--obsidian-black);
      font-weight: 600;
      padding: 0.65rem 1.8rem;
      border-radius: var(--radius-full);
      transition: all 0.3s var(--transition-smooth);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      letter-spacing: 0.3px;
    }
    .btn-primary:hover {
      background: #b5a78a;
      transform: translateY(-1px);
      box-shadow: 0 8px 18px rgba(197, 184, 158, 0.25);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--soft-border);
      color: var(--obsidian-black);
      font-weight: 500;
      padding: 0.65rem 1.8rem;
      border-radius: var(--radius-full);
      transition: all 0.3s;
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
    }
    .btn-outline:hover {
      border-color: var(--sunrise-gold);
      color: var(--sunrise-deep);
    }
    /* 卡片与网格 */
    .card-elegant {
      background: var(--pure-white);
      border: 1px solid var(--soft-border);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-subtle);
      transition: all 0.35s var(--transition-smooth);
    }
    .card-elegant:hover {
      border-color: var(--sunrise-gold);
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .highlight-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.9fr 1.3fr;
      gap: 1.8rem;
    }
    @media (max-width: 1024px) {
      .highlight-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 640px) {
      .highlight-grid {
        grid-template-columns: 1fr;
      }
    }
    .waterfall-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    @media (max-width: 1024px) {
      .waterfall-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 640px) {
      .waterfall-grid {
        grid-template-columns: 1fr;
      }
    }
    .case-card img {
      transition: transform 0.4s ease, filter 0.3s;
      filter: saturate(0.85);
    }
    .case-card:hover img {
      transform: scale(1.03);
      filter: saturate(1);
    }
    .comparison-table {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }
    @media (max-width: 768px) {
      .comparison-table {
        grid-template-columns: 1fr;
      }
    }
    .faq-item {
      border-bottom: 1px solid var(--soft-border);
    }
    .faq-question {
      font-weight: 500;
      font-size: 1.1rem;
      color: var(--obsidian-black);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1.2rem 0;
      transition: color 0.2s;
    }
    .faq-question i {
      color: var(--sunrise-gold);
      font-size: 1.2rem;
      transition: transform 0.3s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s;
      background: #FAFAF8;
      padding: 0 1rem;
      border-radius: 6px;
      margin-bottom: 0;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 1rem;
      margin-bottom: 0.8rem;
    }
    .faq-item.active .faq-question i {
      transform: rotate(45deg);
    }
    .footer-link {
      color: var(--footer-text);
      transition: color 0.2s;
    }
    .footer-link:hover {
      color: var(--sunrise-gold);
    }
    .input-line {
      background: transparent;
      border: none;
      border-bottom: 1px solid #E8E6E1;
      padding: 0.8rem 0.2rem;
      width: 100%;
      font-size: 1rem;
      transition: border-color 0.2s, border-width 0.2s;
      outline: none;
    }
    .input-line:focus {
      border-bottom: 2px solid var(--sunrise-gold);
    }