/* roulang page: index */
:root {
      --primary: #E94E1B;
      --primary-dark: #c43d10;
      --secondary: #1B1B2F;
      --accent: #F5A623;
      --bg: #FAFAFA;
      --card-bg: #FFFFFF;
      --text-main: #1B1B2F;
      --text-muted: #5A5A72;
      --border-light: #E5E5E5;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.08);
      --transition: 0.3s ease;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Inter', system-ui, sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .nav {
      background: white;
      height: 72px;
      border-bottom: 1px solid var(--border-light);
      position: sticky;
      top: 0;
      z-index: 50;
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--secondary);
    }
    .logo i {
      color: var(--accent);
      font-size: 1.8rem;
      transform: rotate(15deg);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      color: var(--text-muted);
      font-weight: 500;
    }
    .nav-links a {
      position: relative;
      padding-bottom: 4px;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width var(--transition);
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .search-box {
      background: #f5f5f5;
      border-radius: 20px;
      padding: 8px 16px;
      display: flex;
      align-items: center;
      gap: 6px;
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      border: none;
      padding: 10px 22px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: background var(--transition), transform var(--transition);
      display: inline-block;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: scale(1.02);
    }
    .btn-outline {
      border: 1px solid var(--secondary);
      color: var(--secondary);
      background: transparent;
      padding: 10px 22px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: all var(--transition);
    }
    .btn-outline:hover {
      background: var(--secondary);
      color: white;
    }
    .hamburger {
      display: none;
      font-size: 1.8rem;
      cursor: pointer;
      color: var(--secondary);
    }
    /* 版块通用 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--secondary);
      letter-spacing: -0.3px;
    }
    .section-sub {
      color: var(--text-muted);
      max-width: 600px;
      margin-bottom: 48px;
      font-size: 1.1rem;
    }
    /* Hero */
    .hero {
      display: flex;
      align-items: center;
      gap: 48px;
      min-height: 85vh;
    }
    .hero-left {
      flex: 1;
    }
    .hero-left h1 {
      font-size: 2.8rem;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      color: var(--secondary);
    }
    .hero-left p {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 32px;
    }
    .hero-right {
      flex: 1;
      height: 420px;
      background: linear-gradient(135deg, rgba(27,27,47,0.75), rgba(27,27,47,0.4)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    }
    .cloud-anim {
      position: absolute;
      width: 140px;
      height: 80px;
      background: rgba(255,255,255,0.2);
      border-radius: 50%;
      filter: blur(8px);
      animation: floatCloud 6s infinite alternate ease-in-out;
    }
    @keyframes floatCloud {
      0% { transform: translate(0, 0) scale(1); }
      100% { transform: translate(20px, -15px) scale(1.1); }
    }
    /* 亮点网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .highlight-card {
      background: var(--card-bg);
      padding: 32px 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: all var(--transition);
    }
    .highlight-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    .highlight-card i {
      font-size: 2rem;
      color: var(--accent);
      margin-bottom: 16px;
      transition: transform 0.4s;
    }
    .highlight-card:hover i {
      transform: rotate(8deg) scale(1.1);
      color: var(--primary);
    }
    /* 案例瀑布 */
    .cases-masonry {
      columns: 2;
      column-gap: 24px;
    }
    .case-card {
      break-inside: avoid;
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      margin-bottom: 24px;
      transition: all var(--transition);
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    .case-img {
      width: 100%;
      height: auto;
      transition: transform 0.4s;
    }
    .case-card:hover .case-img {
      transform: scale(1.05);
    }
    .case-content {
      padding: 20px;
    }
    .tag {
      background: #ffede5;
      color: var(--primary);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
      display: inline-block;
      margin-top: 8px;
    }
    /* 方案对比 */
    .solutions-row {
      display: flex;
      gap: 24px;
    }
    .plan-card {
      flex: 1;
      background: white;
      padding: 40px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border: 1px solid transparent;
    }
    .plan-premium {
      border: 2px solid var(--accent);
      position: relative;
    }
    .badge {
      position: absolute;
      top: 12px;
      right: 12px;
      background: var(--accent);
      color: white;
      padding: 4px 14px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 0.8rem;
    }
    /* 流程 */
    .process-steps {
      display: flex;
      justify-content: space-between;
      align-items: center;
      text-align: center;
    }
    .step {
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
    }
    .step-circle {
      width: 56px;
      height: 56px;
      background: var(--primary);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.8rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    /* FAQ */
    .faq-item {
      background: white;
      border-bottom: 1px solid var(--border-light);
      padding: 20px 0;
      cursor: pointer;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-muted);
      padding-right: 40px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 12px;
    }
    /* 联系 */
    .contact-grid {
      display: flex;
      gap: 40px;
    }
    .contact-form input, .contact-form textarea {
      width: 100%;
      padding: 14px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-btn);
      margin-bottom: 16px;
      transition: border 0.2s;
    }
    .contact-form input:focus, .contact-form textarea:focus {
      border-color: var(--primary);
      outline: none;
    }
    .footer {
      background: var(--secondary);
      color: #ddd;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    @media (max-width: 1024px) {
      .hero {
        flex-direction: column;
        text-align: center;
      }
      .hero-right {
        width: 100%;
        height: 300px;
      }
      .highlights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cases-masonry {
        columns: 1;
      }
      .solutions-row {
        flex-direction: column;
      }
    }
    @media (max-width: 768px) {
      .nav-links, .nav-actions .search-box {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu {
        display: none;
        flex-direction: column;
        background: white;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .mobile-menu.active {
        display: flex;
      }
      .highlights-grid {
        grid-template-columns: 1fr;
      }
      .process-steps {
        flex-direction: column;
        gap: 24px;
      }
      .contact-grid {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }