/* roulang page: index */
:root {
      --primary-green: #0D9E6C;
      --primary-green-hover: #0B8B5E;
      --secondary-gray: #2C3E50;
      --bg-warm: #FAFBF7;
      --card-white: #FFFFFF;
      --text-dark: #1A1F24;
      --text-mid: #7A8599;
      --func-green: #00B578;
      --alert-orange: #FF9F0A;
      --accent-red: #E74C3C;
      --border-light: #EEF0F2;
      --card-shadow: 0 2px 12px rgba(0,0,0,0.04);
      --card-shadow-hover: 0 6px 24px rgba(0,0,0,0.08);
      --radius-lg: 12px;
      --radius-md: 8px;
      --radius-full: 50px;
      --transition: 200ms ease;
      --container-max: 1200px;
      --spacing-section: 100px;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.5;
      -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-max);
      margin: 0 auto;
      padding: 0 40px;
    }

    /* 导航 */
    #header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: var(--bg-warm);
      height: 72px;
      display: flex;
      align-items: center;
      transition: box-shadow var(--transition);
    }
    #header.scrolled {
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 40px;
    }
    .logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--secondary-gray);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo span {
      color: var(--primary-green);
    }
    .nav-menu {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-link {
      font-size: 16px;
      font-weight: 500;
      color: var(--text-dark);
      position: relative;
      padding: 4px 0;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-green);
      transition: width var(--transition);
    }
    .nav-link:hover::after,
    .nav-link.active::after {
      width: 100%;
    }
    .btn-capsule {
      background: var(--primary-green);
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 16px;
      display: inline-block;
      transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
      white-space: nowrap;
    }
    .btn-capsule:hover {
      background: var(--primary-green-hover);
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(13, 158, 108, 0.3);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
      padding: 8px;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--text-dark);
      border-radius: 2px;
      transition: var(--transition);
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: var(--bg-warm);
      flex-direction: column;
      padding: 32px;
      gap: 24px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.08);
      z-index: 40;
    }
    .mobile-menu a {
      font-size: 18px;
      font-weight: 500;
    }

    /* 板块通用 */
    section {
      padding: var(--spacing-section) 0;
    }

    h2 {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      color: var(--text-dark);
    }

    /* Hero */
    #hero {
      padding: 40px 0 100px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 60px;
      align-items: center;
    }
    .hero-text h1 {
      font-size: 44px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 24px;
      color: var(--text-dark);
    }
    .hero-text p {
      font-size: 16px;
      color: var(--text-mid);
      margin-bottom: 32px;
      max-width: 90%;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-green);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 16px;
      border: none;
      cursor: pointer;
      transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    }
    .btn-primary:hover {
      background: var(--primary-green-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(13,158,108,0.25);
    }
    .btn-secondary {
      background: transparent;
      color: var(--primary-green);
      border: 1.5px solid var(--primary-green);
      padding: 14px 32px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: background var(--transition), color var(--transition);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .btn-secondary:hover {
      background: rgba(13,158,108,0.05);
    }
    .hero-image {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-lg);
      height: 400px;
      position: relative;
    }

    /* 痛点 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 40px;
    }
    .pain-card {
      background: #F5F6FA;
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      transition: transform var(--transition), box-shadow var(--transition);
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
    }
    .pain-icon {
      font-size: 28px;
      color: var(--primary-green);
      margin-bottom: 20px;
    }
    .pain-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .pain-card p {
      font-size: 14px;
      color: var(--text-mid);
    }

    /* 解决方案 */
    .solution-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      margin-bottom: 100px;
    }
    .solution-img {
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-lg);
      height: 360px;
    }
    .solution-content h3 {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .solution-list {
      list-style: none;
      margin-top: 20px;
    }
    .solution-list li {
      font-size: 16px;
      margin-bottom: 12px;
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }
    .solution-list li::before {
      content: "•";
      color: var(--primary-green);
      font-weight: bold;
      font-size: 20px;
      line-height: 1;
    }

    /* 成果 */
    #results {
      background: #F5F6FA;
    }
    .results-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 40px;
    }
    .stat-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px 20px;
      text-align: center;
      box-shadow: var(--card-shadow);
    }
    .stat-number {
      font-size: 36px;
      font-weight: 700;
      color: var(--primary-green);
      font-variant-numeric: tabular-nums;
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-mid);
      margin-top: 8px;
    }

    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 40px;
    }
    .testimonial-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--card-shadow);
    }
    .quote-text {
      font-size: 16px;
      margin-bottom: 24px;
      color: var(--text-dark);
    }
    .author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ddd;
    }

    /* FAQ */
    .faq-container {
      max-width: 800px;
      margin: 40px auto 0;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 20px 0;
    }
    .faq-question {
      font-size: 16px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: none;
      border: none;
      width: 100%;
      text-align: left;
      color: var(--text-dark);
    }
    .faq-icon {
      font-size: 20px;
      color: var(--primary-green);
      transition: transform var(--transition);
    }
    .faq-answer {
      font-size: 14px;
      color: var(--text-mid);
      margin-top: 12px;
      display: none;
      line-height: 1.6;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* CTA */
    #cta {
      background: var(--secondary-gray);
      text-align: center;
      padding: 80px 0;
      color: white;
    }
    #cta h2 {
      color: white;
    }
    #cta p {
      color: #ccc;
      margin-bottom: 32px;
    }
    .cta-buttons {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-white-outline {
      background: transparent;
      border: 1.5px solid white;
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-md);
      font-weight: 600;
      transition: background var(--transition);
    }
    .btn-white-outline:hover {
      background: rgba(255,255,255,0.1);
    }

    /* Footer */
    #footer {
      background: var(--secondary-gray);
      color: #ccc;
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand p {
      font-size: 14px;
      margin-top: 12px;
    }
    .footer-links h4 {
      color: white;
      margin-bottom: 16px;
      font-size: 16px;
    }
    .footer-links a {
      display: block;
      font-size: 14px;
      margin-bottom: 10px;
      color: #aaa;
    }
    .copyright {
      text-align: center;
      font-size: 12px;
      border-top: 1px solid #444;
      padding-top: 20px;
    }

    @media (max-width: 1024px) {
      .container, .nav-container {
        padding: 0 24px;
      }
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .hero-image {
        height: 300px;
      }
      .pain-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .results-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .pain-grid, .testimonial-grid, .results-grid {
        grid-template-columns: 1fr;
      }
      .solution-row {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      h1 {
        font-size: 32px !important;
      }
      h2 {
        font-size: 28px;
      }
    }