/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary: #1A1A2E;
      --accent: #E43F5A;
      --accent-hover: #C72E48;
      --bg: #FBFBFD;
      --card-bg: #FFFFFF;
      --muted-bg: #F0F0F3;
      --text-dark: #1E1E2F;
      --text-mid: #6B7280;
      --text-light: #9CA3AF;
      --border-input: #E5E7EB;
      --radius-card-lg: 16px;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 20px;
      --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
      --shadow-card-hover: 0 10px 25px -5px rgba(0,0,0,0.08), 0 4px 10px -2px rgba(0,0,0,0.05);
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-metrics: 'Inter', 'DIN Alternate', 'PingFang SC', sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--bg);
      color: var(--text-dark);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-heading);
    }
    .metrics-font {
      font-family: var(--font-metrics);
      letter-spacing: 0.02em;
    }
    .container-main {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 2rem;
      padding-right: 2rem;
    }
    @media (max-width: 768px) {
      .container-main {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
      }
    }
    /* 导航卡片面板 */
    .nav-panel {
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: 20px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.04);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.75rem 2rem;
      margin-top: 16px;
      transition: all 0.2s;
    }
    .nav-logo {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.45rem;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 0.4rem;
      letter-spacing: -0.3px;
      text-decoration: none;
    }
    .nav-logo span {
      color: var(--accent);
      font-size: 1.8rem;
      line-height: 1;
    }
    .nav-item {
      display: flex;
      align-items: center;
      gap: 0.4rem;
      background: #F3F4F6;
      padding: 0.5rem 1rem;
      border-radius: 10px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-dark);
      transition: all 0.2s;
      text-decoration: none;
      white-space: nowrap;
    }
    .nav-item i {
      font-size: 1rem;
      color: var(--text-mid);
    }
    .nav-item:hover {
      background: rgba(228, 63, 90, 0.1);
      color: var(--accent);
    }
    .nav-cta {
      background: var(--accent);
      color: white;
      border-radius: 20px;
      padding: 0.6rem 1.6rem;
      font-weight: 600;
      font-size: 0.9rem;
      transition: all 0.2s;
      border: none;
      cursor: pointer;
      text-decoration: none;
      display: inline-block;
    }
    .nav-cta:hover {
      background: var(--accent-hover);
      transform: scale(1.03);
    }
    /* 汉堡菜单 */
    .hamburger {
      display: none;
      background: transparent;
      border: none;
      font-size: 1.6rem;
      color: var(--primary);
    }
    @media (max-width: 768px) {
      .nav-panel {
        flex-wrap: wrap;
        padding: 0.75rem 1.25rem;
      }
      .nav-links-desktop {
        display: none;
        width: 100%;
        flex-direction: column;
        margin-top: 1rem;
        gap: 0.5rem;
      }
      .nav-links-desktop.active {
        display: flex;
      }
      .hamburger {
        display: block;
      }
      .nav-item {
        justify-content: center;
      }
    }
    /* hero 数据指标 */
    .hero-metric {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--accent);
      font-family: var(--font-metrics);
      line-height: 1.2;
    }
    /* 按钮 */
    .btn-primary {
      background: var(--accent);
      color: white;
      font-weight: 600;
      border-radius: 8px;
      padding: 0.85rem 2rem;
      transition: all 0.2s;
      display: inline-block;
      text-decoration: none;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      transform: scale(1.03);
    }
    .btn-secondary {
      background: transparent;
      border: 1px solid var(--accent);
      color: var(--accent);
      font-weight: 600;
      border-radius: 8px;
      padding: 0.85rem 2rem;
      transition: all 0.2s;
      display: inline-block;
      text-decoration: none;
    }
    .btn-secondary:hover {
      background: rgba(228, 63, 90, 0.05);
      border-color: var(--accent-hover);
      color: var(--accent-hover);
    }
    /* 卡片通用 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: all 0.25s;
    }
    .card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }
    /* 服务左大卡片 */
    .service-large {
      border-radius: 16px;
      overflow: hidden;
      position: relative;
      background: white;
      box-shadow: var(--shadow-card);
      transition: all 0.25s;
    }
    .service-large:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    .service-large img {
      transition: transform 0.4s;
    }
    .service-large:hover img {
      transform: scale(1.05);
    }
    /* FAQ 手风琴 */
    .faq-item {
      background: white;
      border-radius: 12px;
      padding: 1rem 1.5rem;
      margin-bottom: 12px;
      cursor: pointer;
      box-shadow: var(--shadow-card);
      transition: background 0.2s;
    }
    .faq-question {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-weight: 600;
      color: var(--text-dark);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, margin 0.2s;
      color: var(--text-mid);
      margin-top: 0;
      padding-left: 2rem;
    }
    .faq-item.active .faq-answer {
      max-height: 100px;
      margin-top: 0.75rem;
    }
    .faq-icon {
      color: var(--accent);
      width: 20px;
      text-align: center;
    }
    /* 表单 */
    .input-field {
      width: 100%;
      height: 48px;
      border: 1px solid var(--border-input);
      border-radius: 8px;
      padding: 0 1rem;
      font-size: 0.95rem;
      transition: border 0.15s;
      background: white;
    }
    .input-field:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(228,63,90,0.1);
    }
    footer {
      background: var(--primary);
      color: white;
    }