/* roulang page: index */
:root {
      --primary-deep-purple: #3D2B4F;
      --accent-champagne: #D4AF37;
      --bg-warm-white: #FAF8F5;
      --card-white: #FFFFFF;
      --text-dark: #2C2C2C;
      --text-body: #4A4A4A;
      --text-muted: #7A7A7A;
      --border-light: #E6E0DA;
      --shadow-card: 0 4px 20px rgba(61, 43, 79, 0.08);
      --shadow-card-hover: 0 8px 30px rgba(61, 43, 79, 0.15);
      --radius-card: 16px;
      --radius-button: 30px;
      --transition-smooth: 0.25s ease;
      --font-sans: 'Noto Sans SC', '思源黑体', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm-white);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4 {
      font-weight: 600;
      color: var(--primary-deep-purple);
      letter-spacing: -0.2px;
    }
    
    h1 { font-size: 40px; line-height: 1.2; font-weight: 700; }
    h2 { font-size: 32px; line-height: 1.3; }
    h3 { font-size: 22px; line-height: 1.4; color: var(--text-dark); }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255,255,255,0.96);
      backdrop-filter: blur(8px);
      height: 72px;
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      display: flex;
      align-items: center;
    }
    
    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    
    .logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary-deep-purple);
      letter-spacing: 1px;
    }
    .logo span {
      color: var(--accent-champagne);
    }
    
    .nav-menu {
      display: flex;
      gap: 40px;
      align-items: center;
    }
    
    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-dark);
      position: relative;
      padding: 8px 0;
    }
    
    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--accent-champagne);
      transition: width 0.2s ease;
    }
    
    .nav-menu a:hover {
      color: var(--accent-champagne);
    }
    .nav-menu a:hover::after {
      width: 100%;
    }
    
    .hamburger {
      display: none;
      font-size: 26px;
      cursor: pointer;
      color: var(--primary-deep-purple);
    }
    
    /* 移动端导航 */
    @media (max-width: 768px) {
      .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--primary-deep-purple);
        padding: 24px 0;
        gap: 20px;
        box-shadow: 0 12px 24px rgba(0,0,0,0.2);
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-menu a {
        color: white;
        padding: 8px 24px;
        font-size: 18px;
      }
      .hamburger {
        display: block;
      }
    }
    
    /* 按钮 */
    .btn-primary {
      background: var(--primary-deep-purple);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-button);
      font-weight: 600;
      display: inline-block;
      border: none;
      cursor: pointer;
      transition: var(--transition-smooth);
      text-align: center;
    }
    .btn-primary:hover {
      background: var(--accent-champagne);
      color: var(--primary-deep-purple);
    }
    
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary-deep-purple);
      color: var(--primary-deep-purple);
      padding: 12px 28px;
      border-radius: var(--radius-button);
      font-weight: 600;
      display: inline-block;
      transition: var(--transition-smooth);
    }
    .btn-outline:hover {
      background: rgba(61,43,79,0.08);
    }
    
    /* Hero */
    .hero {
      background: linear-gradient(90deg, rgba(61,43,79,0.92) 0%, rgba(61,43,79,0.5) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 70vh;
      display: flex;
      align-items: center;
      color: white;
    }
    .hero-content {
      display: flex;
      align-items: center;
      gap: 48px;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1 1 50%;
    }
    .hero-text h1 {
      color: white;
      font-size: 48px;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 18px;
      color: rgba(255,255,255,0.85);
      margin-bottom: 32px;
    }
    .hero-visual {
      flex: 1 1 40%;
      background: rgba(255,255,255,0.1);
      border-radius: 32px;
      padding: 24px;
      backdrop-filter: blur(10px);
    }
    .hero-visual img {
      border-radius: 20px;
      width: 100%;
      height: auto;
    }
    
    /* 通用板块 */
    .section {
      padding: 100px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }
    .section-title h2 {
      margin-bottom: 12px;
    }
    .section-title p {
      color: var(--text-muted);
      font-size: 18px;
    }
    
    /* 服务卡片 错落设计 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .service-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
      position: relative;
    }
    .service-card:nth-child(2) {
      transform: translateY(-8px);
      box-shadow: 0 12px 28px rgba(61,43,79,0.12);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
    }
    .service-icon {
      font-size: 36px;
      color: var(--accent-champagne);
      margin-bottom: 20px;
    }
    .service-card h3 {
      margin-bottom: 12px;
    }
    .text-link {
      color: var(--primary-deep-purple);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .text-link:hover {
      color: var(--accent-champagne);
    }
    
    /* 数据徽章 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      background: #F3EEF7;
      border-radius: 24px;
      padding: 32px;
    }
    .stat-item {
      text-align: center;
      background: rgba(255,255,255,0.6);
      border-radius: 12px;
      padding: 24px 16px;
      backdrop-filter: blur(4px);
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--accent-champagne);
      line-height: 1.2;
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-dark);
      margin-top: 8px;
    }
    
    /* 案例卡片 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      display: flex;
      transition: var(--transition-smooth);
    }
    .case-card:hover {
      box-shadow: var(--shadow-card-hover);
    }
    .case-img {
      flex: 1 1 45%;
    }
    .case-img img {
      height: 100%;
      object-fit: cover;
    }
    .case-info {
      flex: 1 1 55%;
      padding: 28px;
    }
    
    /* 流程步骤 */
    .steps-container {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      position: relative;
      flex-wrap: wrap;
    }
    .step-item {
      text-align: center;
      flex: 1;
      min-width: 140px;
      position: relative;
    }
    .step-circle {
      width: 48px;
      height: 48px;
      background: var(--primary-deep-purple);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin: 0 auto 16px;
    }
    .step-title {
      font-weight: 600;
      color: var(--text-dark);
    }
    .dotted-line {
      position: absolute;
      top: 24px;
      left: 50%;
      width: 100%;
      border-top: 2px dashed var(--accent-champagne);
      z-index: -1;
      opacity: 0.5;
    }
    
    /* FAQ */
    .accordion-item {
      border-bottom: 1px solid var(--border-light);
    }
    .accordion-title {
      font-size: 18px;
      font-weight: 500;
      padding: 20px 0;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-dark);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding-left: 12px;
      border-left: 3px solid transparent;
    }
    .accordion-item.active .accordion-content {
      max-height: 200px;
      padding-bottom: 20px;
      border-left-color: var(--accent-champagne);
    }
    
    /* CTA 横幅 */
    .cta-banner {
      background: var(--primary-deep-purple);
      border-radius: 32px;
      padding: 60px 40px;
      text-align: center;
      color: white;
      margin: 80px 0;
    }
    .cta-banner h2 {
      color: white;
    }
    
    /* 页脚 */
    .site-footer {
      background: var(--primary-deep-purple);
      color: #ccc;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    .footer-logo {
      font-size: 22px;
      font-weight: 700;
      color: white;
      margin-bottom: 16px;
    }
    
    @media (max-width: 1024px) {
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
      .cases-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    
    @media (max-width: 640px) {
      h1 { font-size: 32px; }
      .section { padding: 60px 0; }
      .hero-content { flex-direction: column; }
      .services-grid { grid-template-columns: 1fr; }
      .stats-grid { grid-template-columns: 1fr; }
      .steps-container { flex-direction: column; gap: 32px; }
      .dotted-line { display: none; }
      .footer-grid { grid-template-columns: 1fr; }
      .case-card { flex-direction: column; }
    }