/* roulang page: index */
:root {
      --primary: #0A7E3D;
      --primary-hover: #086b32;
      --accent: #F5A623;
      --accent-light: rgba(245, 166, 35, 0.1);
      --dark: #1A2B3C;
      --text: #1E293B;
      --text-secondary: #64748B;
      --bg: #F7F9FC;
      --card-bg: #FFFFFF;
      --border: #E2E8F0;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
      --radius: 12px;
      --radius-btn: 8px;
      --transition: 0.25s ease;
      --container: 1280px;
      --section-gap: 80px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", "Roboto", system-ui, sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }

    .container {
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid transparent;
      transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .header.scrolled {
      background: rgba(255, 255, 255, 0.98);
      box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
      border-bottom-color: var(--border);
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 68px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 22px;
      color: var(--primary);
      letter-spacing: 0.5px;
    }

    .logo svg {
      width: 34px;
      height: 34px;
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      list-style: none;
      font-weight: 500;
      color: var(--text);
    }

    .nav-links a {
      position: relative;
      padding: 8px 0;
    }

    .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%;
    }

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

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-top: 1px solid var(--border);
      padding: 8px 20px;
      justify-content: space-around;
      z-index: 99;
      box-shadow: 0 -4px 12px rgba(0,0,0,0.02);
    }

    .mobile-bottom-nav a {
      display: flex;
      flex-direction: column;
      align-items: center;
      font-size: 12px;
      color: var(--text-secondary);
      gap: 4px;
      font-weight: 500;
    }

    .mobile-bottom-nav a.active {
      color: var(--primary);
    }

    /* Hero */
    .hero {
      padding: 140px 0 80px;
      display: flex;
      align-items: center;
      gap: 60px;
      min-height: 85vh;
    }

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

    .hero-right {
      flex: 1 1 45%;
      position: relative;
    }

    .hero h1 {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 20px;
      color: var(--dark);
    }

    .hero .subtitle {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 32px;
      max-width: 480px;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      transition: all var(--transition);
      cursor: pointer;
      border: none;
      background: transparent;
      text-align: center;
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      box-shadow: 0 4px 10px rgba(10, 126, 61, 0.25);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      transform: scale(1.02);
    }

    .btn-outline {
      border: 2px solid var(--accent);
      color: var(--accent);
      background: transparent;
    }

    .btn-outline:hover {
      background: var(--accent-light);
    }

    .hero-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      box-shadow: var(--shadow-md);
      padding: 24px;
      transform: rotate(1deg);
      transition: transform var(--transition);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      color: white;
      position: relative;
      overflow: hidden;
      min-height: 280px;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
    }

    .hero-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(0deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.1) 70%);
    }

    .hero-card-content {
      position: relative;
      z-index: 2;
    }

    .match-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: rgba(255,255,255,0.15);
      backdrop-filter: blur(4px);
      padding: 12px 16px;
      border-radius: 10px;
      margin-top: 12px;
    }

    /* 板块标题 */
    .section {
      padding: var(--section-gap) 0;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--dark);
    }

    .section-desc {
      color: var(--text-secondary);
      max-width: 600px;
      margin-bottom: 48px;
      font-size: 18px;
    }

    /* 亮点网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 28px;
    }

    .feature-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all var(--transition);
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }

    .feature-icon {
      width: 48px;
      height: 48px;
      background: var(--accent-light);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-size: 24px;
    }

    .feature-card h3 {
      font-size: 20px;
      font-weight: 600;
    }

    /* 案例瀑布流 */
    .cases-masonry {
      columns: 3 280px;
      column-gap: 24px;
    }

    .case-card {
      break-inside: avoid;
      background: var(--card-bg);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
      transition: all var(--transition);
    }

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

    .case-img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .case-card:hover .case-img {
      transform: scale(1.03);
    }

    .case-text {
      padding: 20px;
    }

    /* 方案对比 */
    .compare-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 32px;
    }

    .plan-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      border: 2px solid transparent;
      transition: all var(--transition);
      position: relative;
    }

    .plan-card.pro {
      border-color: var(--primary);
    }

    .plan-badge {
      background: var(--accent);
      color: #1E293B;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 14px;
      display: inline-block;
      margin-bottom: 16px;
    }

    .plan-feature {
      display: flex;
      align-items: center;
      gap: 10px;
      margin: 16px 0;
      color: var(--text);
    }

    /* FAQ */
    .faq-item {
      background: var(--card-bg);
      border-radius: var(--radius);
      margin-bottom: 12px;
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      font-size: 18px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: var(--card-bg);
      transition: background var(--transition);
    }

    .faq-answer {
      padding: 0 24px 20px;
      color: var(--text-secondary);
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    /* CTA 横幅 */
    .cta-band {
      background: var(--dark);
      border-radius: var(--radius);
      padding: 60px;
      text-align: center;
      color: white;
    }

    .footer {
      background: var(--dark);
      color: #CBD5E1;
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 40px;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .mobile-bottom-nav {
        display: flex;
      }
      .hero {
        flex-direction: column;
        padding: 120px 0 60px;
        gap: 40px;
      }
      h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .cases-masonry {
        columns: 1;
      }
      .container {
        padding: 0 20px;
      }
      .cta-band {
        padding: 40px 24px;
      }
      body {
        padding-bottom: 70px;
      }
    }