/* roulang page: index */
:root {
      --primary-blue: #4E6EF2;
      --deep-indigo: #3D2BFF;
      --success-green: #00B578;
      --warning-orange: #FF9F0A;
      --error-red: #FA5151;
      --text-dark: #1F2329;
      --text-mid: #86909C;
      --bg-light: #F5F6FA;
      --card-glass-bg: rgba(255, 255, 255, 0.75);
      --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
      --card-hover-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
      --radius-lg: 12px;
      --radius-md: 8px;
      --radius-sm: 6px;
      --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --transition: 150ms ease;
    }

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

    body {
      font-family: var(--font-sans);
      line-height: 1.6;
      color: var(--text-dark);
      background-color: #FFFFFF;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏 PC */
    .main-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 64px;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(0, 0, 0, 0.05);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      box-shadow: 0 1px 4px rgba(0,0,0,0.02);
    }

    .logo {
      display: flex;
      align-items: center;
      text-decoration: none;
      font-size: 22px;
      font-weight: 700;
      color: var(--text-dark);
      letter-spacing: 0.5px;
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: linear-gradient(135deg, var(--primary-blue), var(--deep-indigo));
      border-radius: 6px;
      margin-right: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 16px;
      clip-path: polygon(0% 20%, 40% 0%, 100% 20%, 80% 100%, 20% 100%);
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .nav-menu a {
      text-decoration: none;
      font-size: 16px;
      font-weight: 500;
      color: var(--text-mid);
      padding: 8px 0;
      border-bottom: 2px solid transparent;
      transition: all var(--transition);
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--primary-blue);
      border-bottom-color: var(--primary-blue);
    }

    .nav-cta {
      background-color: var(--primary-blue);
      color: white !important;
      padding: 8px 20px !important;
      border-radius: var(--radius-md);
      font-weight: 600;
      border: none !important;
      transition: background-color var(--transition), box-shadow var(--transition);
      margin-left: 8px;
    }

    .nav-cta:hover {
      background-color: #3d5bd9;
      box-shadow: 0 0 0 4px rgba(78, 110, 242, 0.2);
    }

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
    }

    @media (max-width: 768px) {
      .main-header {
        display: none;
      }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 64px;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(12px);
        border-top: 1px solid rgba(0,0,0,0.06);
        z-index: 1000;
        justify-content: space-around;
        align-items: center;
        padding: 0 8px;
        box-shadow: 0 -2px 10px rgba(0,0,0,0.04);
      }
      .mobile-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-decoration: none;
        color: var(--text-mid);
        font-size: 12px;
        font-weight: 500;
        gap: 4px;
        transition: color var(--transition);
        padding: 8px 6px;
        border-radius: 12px;
      }
      .mobile-nav-item i {
        font-size: 20px;
      }
      .mobile-nav-item.active {
        color: var(--primary-blue);
        background: rgba(78,110,242,0.08);
      }
      .mobile-nav-cta {
        background: var(--primary-blue);
        color: white;
        padding: 6px 14px;
        border-radius: 20px;
        font-weight: 600;
        display: flex;
        align-items: center;
        gap: 4px;
        box-shadow: 0 4px 12px rgba(78,110,242,0.3);
      }
      .container {
        padding: 0 16px;
      }
    }

    /* Hero */
    .hero {
      padding: 120px 0 80px;
      display: flex;
      align-items: center;
      gap: 60px;
    }

    .hero-left {
      flex: 1;
    }

    .hero-left h1 {
      font-size: 36px;
      font-weight: 700;
      color: var(--text-dark);
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-mid);
      margin-bottom: 24px;
      min-height: 28px;
    }

    .value-props {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 32px;
      font-size: 14px;
      color: #5E6875;
    }

    .cta-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--primary-blue);
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-md);
      font-weight: 600;
      text-decoration: none;
      display: inline-block;
      border: none;
      cursor: pointer;
      transition: all var(--transition);
      box-shadow: 0 4px 12px rgba(78,110,242,0.25);
    }

    .btn-primary:hover {
      background: #3d5bd9;
      box-shadow: 0 0 0 4px rgba(78,110,242,0.3);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary-blue);
      color: var(--primary-blue);
      padding: 12px 28px;
      border-radius: var(--radius-md);
      font-weight: 600;
      text-decoration: none;
      transition: background var(--transition);
    }

    .btn-outline:hover {
      background: rgba(78,110,242,0.05);
    }

    .hero-right {
      flex: 1;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: var(--radius-lg);
      height: 360px;
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0,0,0,0.15);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .glass-stack {
      background: rgba(255,255,255,0.2);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-lg);
      border: 1px solid rgba(255,255,255,0.4);
      padding: 40px;
      width: 80%;
      text-align: center;
      color: white;
      font-weight: 600;
      font-size: 18px;
      text-shadow: 0 2px 4px rgba(0,0,0,0.2);
    }

    @media (max-width: 768px) {
      .hero {
        flex-direction: column;
        padding: 80px 0 40px;
        gap: 32px;
      }
      .hero-left h1 {
        font-size: 28px;
      }
      .hero-right {
        height: 240px;
      }
    }

    /* 亮点网格 */
    .features-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 24px;
      margin: 80px 0;
    }

    .feature-card {
      background: var(--card-glass-bg);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255,255,255,0.5);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      box-shadow: var(--card-shadow);
    }

    .feature-icon {
      width: 48px;
      height: 48px;
      background: rgba(78,110,242,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-blue);
      font-size: 24px;
      margin-bottom: 16px;
    }

    .feature-metric {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-dark);
      margin: 12px 0 4px;
    }

    @media (max-width: 768px) {
      .features-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 产品卡片 */
    .products-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      margin: 80px 0;
    }

    .product-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--card-shadow);
      transition: transform var(--transition), box-shadow var(--transition);
      display: flex;
      flex-direction: column;
    }

    .product-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-hover-shadow);
    }

    .product-img {
      width: 100%;
      height: 200px;
      background-size: cover;
      border-radius: var(--radius-md);
      margin-bottom: 20px;
    }

    .feature-list {
      list-style: none;
      margin: 16px 0;
    }

    .feature-list li {
      margin-bottom: 8px;
      color: var(--text-mid);
    }

    .feature-list i {
      color: var(--success-green);
      margin-right: 8px;
    }

    @media (max-width: 768px) {
      .products-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 方案对比 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0;
      margin: 80px 0;
    }

    .plan-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: var(--card-shadow);
      border: 2px solid transparent;
      text-align: center;
    }

    .plan-highlight {
      border-color: var(--primary-blue);
      position: relative;
      box-shadow: 0 0 20px rgba(78,110,242,0.1);
    }

    .badge {
      background: var(--primary-blue);
      color: white;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
    }

    @media (max-width: 768px) {
      .pricing-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }
    }

    /* 案例轮播 */
    .cases-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding: 40px 0 20px;
      scroll-snap-type: x mandatory;
    }

    .case-card {
      min-width: 300px;
      background: white;
      border-radius: var(--radius-lg);
      padding: 20px;
      box-shadow: var(--card-shadow);
      display: flex;
      gap: 16px;
      scroll-snap-align: start;
    }

    .case-img {
      width: 80px;
      height: 80px;
      background-size: cover;
      border-radius: var(--radius-md);
    }

    .case-stat {
      font-size: 24px;
      font-weight: 700;
      color: var(--success-green);
    }

    /* FAQ */
    .faq-layout {
      display: grid;
      grid-template-columns: 200px 1fr;
      gap: 32px;
      margin: 80px 0;
    }

    .faq-tabs {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .faq-tab {
      padding: 10px 16px;
      background: transparent;
      border-radius: var(--radius-md);
      cursor: pointer;
      font-weight: 500;
      color: var(--text-mid);
    }

    .faq-tab.active {
      background: rgba(78,110,242,0.08);
      color: var(--primary-blue);
    }

    .accordion-item {
      border-bottom: 1px solid rgba(0,0,0,0.05);
      padding: 16px 0;
    }

    @media (max-width: 768px) {
      .faq-layout {
        grid-template-columns: 1fr;
      }
      .faq-tabs {
        flex-direction: row;
        overflow-x: auto;
      }
    }

    /* CTA */
    .cta-full {
      background: linear-gradient(135deg, var(--deep-indigo), var(--primary-blue));
      border-radius: var(--radius-lg);
      padding: 80px 24px;
      text-align: center;
      color: white;
      margin: 80px 0;
    }

    .btn-glow {
      background: white;
      color: var(--primary-blue);
      padding: 14px 36px;
      border-radius: var(--radius-md);
      font-weight: 700;
      box-shadow: 0 0 20px rgba(255,255,255,0.4);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(255,255,255,0.4); }
      70% { box-shadow: 0 0 0 12px rgba(255,255,255,0); }
      100% { box-shadow: 0 0 0 0 rgba(255,255,255,0); }
    }

    /* 页脚 */
    .footer {
      background: var(--bg-light);
      padding: 60px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }

    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    .copyright {
      text-align: center;
      margin-top: 40px;
      color: var(--text-mid);
      font-size: 14px;
      border-top: 1px solid rgba(0,0,0,0.05);
      padding-top: 20px;
    }