/* roulang page: index */
:root {
      --primary: #F15A24;
      --primary-dark: #E63917;
      --primary-glow: #F4A261;
      --gold: #E9C46A;
      --dark: #1E1E1E;
      --gray-light: #F7F7F7;
      --bg: #FAFAFA;
      --white: #FFFFFF;
      --text-muted: #6B7280;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 12px 28px rgba(0,0,0,0.08);
      --radius-card: 20px;
      --radius-btn: 28px;
      --radius-input: 12px;
      --transition: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      background-color: var(--bg);
      color: var(--dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    img {
      max-width: 100%;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    button, input, textarea {
      font-family: inherit;
    }

    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
      width: 100%;
    }

    /* 导航栏 */
    .navbar {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0,0,0,0.05);
      height: 72px;
      display: flex;
      align-items: center;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo {
      font-size: 28px;
      font-weight: 800;
      color: var(--dark);
      display: flex;
      align-items: center;
      gap: 6px;
      letter-spacing: -0.5px;
    }
    .logo-icon {
      color: var(--primary);
      font-size: 32px;
      transform: rotate(-5deg);
    }

    .nav-links {
      display: flex;
      gap: 36px;
      align-items: center;
    }

    .nav-link {
      font-weight: 500;
      color: var(--dark);
      transition: color 0.2s;
      position: relative;
      font-size: 16px;
    }
    .nav-link:hover {
      color: var(--primary);
    }

    .btn-cta {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
      color: white;
      padding: 10px 26px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
      box-shadow: 0 8px 18px rgba(241,90,36,0.25);
      display: inline-block;
      letter-spacing: 0.3px;
    }
    .btn-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 24px rgba(241,90,36,0.35);
      filter: brightness(1.08);
    }

    .mobile-menu-btn {
      display: none;
      font-size: 28px;
      background: none;
      border: none;
      color: var(--dark);
      cursor: pointer;
    }

    /* Hero 区域 */
    .hero {
      min-height: 85vh;
      display: flex;
      align-items: center;
      background: linear-gradient(105deg, #FFF9F5 0%, #FFFFFF 70%);
      position: relative;
      overflow: hidden;
    }

    .hero-decor {
      position: absolute;
      right: 5%;
      top: 15%;
      width: 340px;
      height: 340px;
      background: radial-gradient(circle, rgba(241,90,36,0.08) 0%, transparent 70%);
      border-radius: 50%;
      filter: blur(40px);
    }

    .hero-content {
      display: flex;
      align-items: center;
      gap: 48px;
      flex-wrap: wrap;
    }

    .hero-text {
      flex: 1 1 50%;
    }

    .hero-badge {
      background: white;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 8px 20px;
      border-radius: 40px;
      box-shadow: var(--shadow-sm);
      font-weight: 600;
      color: var(--primary-dark);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.2;
      color: var(--dark);
      margin: 0 0 18px;
    }
    .hero-title span {
      background: linear-gradient(to right, #F15A24, #E9C46A);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-sub {
      font-size: 20px;
      font-weight: 500;
      color: #4B5563;
      margin-bottom: 12px;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      max-width: 550px;
      margin-bottom: 32px;
    }

    .hero-buttons {
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
    }

    .btn-outline {
      border: 2px solid var(--primary);
      color: var(--primary);
      background: transparent;
      padding: 10px 26px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
      display: inline-block;
    }
    .btn-outline:hover {
      background: rgba(241,90,36,0.08);
      transform: translateY(-2px);
    }

    .hero-image {
      flex: 1 1 45%;
      position: relative;
    }
    .hero-image img {
      border-radius: 32px;
      box-shadow: 0 30px 45px rgba(0,0,0,0.12);
      object-fit: cover;
      width: 100%;
      height: auto;
      min-height: 300px;
    }

    /* 通用板块 */
    .section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 36px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 16px;
    }
    .section-sub {
      color: var(--text-muted);
      font-size: 18px;
      max-width: 600px;
      margin-bottom: 48px;
    }

    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .service-card.featured {
      border-left: 5px solid var(--primary);
    }
    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-md);
    }
    .service-icon {
      font-size: 38px;
      color: var(--primary);
      margin-bottom: 20px;
    }
    .service-title {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .service-desc {
      color: #4B5563;
      margin-bottom: 20px;
      flex: 1;
    }
    .service-link {
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 数据看板 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: white;
      border-radius: 18px;
      padding: 28px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: 0.2s;
    }
    .stat-card:hover {
      transform: scale(1.03);
    }
    .stat-number {
      font-size: 44px;
      font-weight: 800;
      background: linear-gradient(135deg, #F15A24, #E9C46A);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    /* 案例卡片 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .case-card {
      background: white;
      border-radius: 18px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .case-img {
      height: 200px;
      object-fit: cover;
      width: 100%;
    }
    .case-tag {
      background: #FFF0E9;
      color: var(--primary);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
    }

    /* 时间轴步骤 */
    .steps-container {
      display: flex;
      justify-content: space-between;
      position: relative;
    }
    .step-item {
      text-align: center;
      flex: 1;
    }

    /* FAQ */
    .faq-item {
      background: #F7F7F7;
      border-radius: 14px;
      margin-bottom: 16px;
      transition: 0.3s;
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }

    /* 联系区块 */
    .contact-cta {
      background: linear-gradient(135deg, #1E1E1E 0%, #3A2C2A 100%);
      border-radius: 36px;
      padding: 64px 40px;
      color: white;
    }

    .footer {
      background: #1E1E1E;
      color: #CCCCCC;
      padding: 60px 0 30px;
    }

    @media (max-width: 1024px) {
      .services-grid, .cases-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 38px;
      }
      .services-grid, .cases-grid {
        grid-template-columns: 1fr;
      }
      .steps-container {
        flex-direction: column;
      }
    }