/* roulang page: index */
:root {
      --primary: #B8860B;
      --primary-dark: #9A6D1F;
      --primary-light: #E5C687;
      --accent: #6B1D2F;
      --bg-warm: #FAF7F2;
      --bg-dark: #1E1E1E;
      --text-main: #2C2C2C;
      --text-secondary: #6B6B6B;
      --text-light: #B0B0B0;
      --border-light: #E8E0D5;
      --border-input: #D9D0C0;
      --shadow-card: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.08);
      --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
      --radius-card: 12px;
      --radius-service-card: 20px 12px 8px 20px;
      --radius-btn: 8px;
      --radius-pill: 20px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.7;
      -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;
    }

    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }
    @media (min-width: 640px) {
      .container-custom {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }

    /* 导航吸顶效果 */
    .nav-sticky {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(250, 247, 242, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      transition: box-shadow 0.3s ease, background 0.3s ease;
    }
    .nav-sticky.scrolled {
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    }

    /* 频道Tabs滚动条隐藏 */
    .tabs-scroll::-webkit-scrollbar {
      display: none;
    }
    .tabs-scroll {
      -ms-overflow-style: none;
      scrollbar-width: none;
    }

    /* 服务卡片装饰线 */
    .service-card .decor-line {
      width: 30px;
      height: 2px;
      background-color: var(--accent);
      transition: width 0.3s ease;
    }
    .service-card:hover .decor-line {
      width: 60px;
    }

    /* 手风琴动画 */
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
    }
    .faq-item.open .faq-icon {
      transform: rotate(180deg);
    }
    .faq-icon {
      transition: transform 0.3s ease;
    }

    /* 数据指标数字样式 */
    .metric-number {
      font-feature-settings: "tnum";
      font-variant-numeric: tabular-nums;
    }

    /* 表单聚焦光晕 */
    input:focus, select:focus, textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.15);
    }

    .btn-primary {
      background-color: var(--primary);
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.75rem 1.75rem;
      font-weight: 600;
      transition: all 0.25s ease;
      display: inline-block;
      text-align: center;
      box-shadow: 0 4px 10px rgba(184, 134, 11, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      box-shadow: 0 6px 16px rgba(184, 134, 11, 0.4);
      transform: scale(1.02);
    }

    .btn-outline {
      border: 1.5px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-btn);
      padding: 0.75rem 1.75rem;
      font-weight: 600;
      transition: all 0.25s ease;
      display: inline-block;
      text-align: center;
      background: transparent;
    }
    .btn-outline:hover {
      background-color: rgba(184, 134, 11, 0.08);
      border-color: var(--primary-dark);
      color: var(--primary-dark);
    }

    .pill-tab {
      border-radius: var(--radius-pill);
      padding: 0.5rem 1.2rem;
      font-weight: 500;
      transition: all 0.2s ease;
      white-space: nowrap;
      color: var(--text-secondary);
    }
    .pill-tab.active {
      background-color: var(--primary);
      color: white;
      box-shadow: 0 2px 8px rgba(184, 134, 11, 0.3);
    }
    .pill-tab:not(.active):hover {
      background-color: rgba(184, 134, 11, 0.08);
      color: var(--primary);
    }