/* roulang page: index */
:root {
      --primary: #1A3C34;
      --primary-light: #235F52;
      --accent: #D4A853;
      --accent-light: #E5BC6A;
      --bg: #F7F5F0;
      --dark-bg: #0F2622;
      --text: #1E1E1E;
      --text-secondary: #5A5A5A;
      --border: #E0DCD3;
      --success: #2D8B6E;
      --white: #FFFFFF;
      --card-hover-bg: #FCFAF7;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-pill: 20px;
      --shadow-card: 0 2px 12px rgba(15, 38, 34, 0.06);
      --shadow-hover: 0 8px 24px rgba(15, 38, 34, 0.12);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Inter", "Segoe UI", system-ui, sans-serif;
      --transition: 0.25s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      transition: var(--transition);
    }

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

    /* 导航 Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: var(--white);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
      height: 68px;
      display: flex;
      align-items: center;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 20px;
      color: var(--primary);
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: var(--accent);
      mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg>') center/contain no-repeat;
      background-color: var(--accent);
    }

    .nav-links {
      display: flex;
      gap: 32px;
      list-style: none;
    }

    .nav-links a {
      font-size: 15px;
      color: var(--text-secondary);
      padding: 8px 0;
      border-bottom: 2px solid transparent;
      transition: 0.2s;
    }

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

    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .search-box {
      border: 1px solid var(--border);
      border-radius: var(--radius-pill);
      padding: 8px 16px;
      font-size: 14px;
      width: 160px;
      background: var(--bg);
      color: var(--text);
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      border-radius: var(--radius-sm);
      padding: 12px 24px;
      font-weight: 600;
      font-size: 15px;
      letter-spacing: 0.5px;
      white-space: nowrap;
    }

    .btn-primary:hover {
      background: var(--primary-light);
      box-shadow: 0 0 0 4px rgba(26,60,52,0.15);
    }

    .hamburger {
      display: none;
      font-size: 24px;
      background: none;
      border: none;
      color: var(--primary);
      padding: 8px;
    }

    /* 区块通用 */
    section {
      padding: 80px 0;
    }

    .section-title {
      font-size: 32px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--text);
    }

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

    .text-center {
      text-align: center;
    }

    /* Hero */
    #hero {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      padding: 120px 0;
      color: white;
    }

    #hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(15, 38, 34, 0.75);
    }

    .hero-content {
      position: relative;
      max-width: 650px;
    }

    .hero-tag {
      font-size: 13px;
      letter-spacing: 2px;
      color: var(--accent);
      text-transform: uppercase;
      margin-bottom: 20px;
      font-weight: 500;
    }

    .hero-title {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 24px;
    }

    .hero-desc {
      font-size: 18px;
      color: rgba(255,255,255,0.85);
      margin-bottom: 32px;
    }

    .trust-badges {
      display: flex;
      gap: 24px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }

    .badge-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: rgba(255,255,255,0.9);
    }

    .btn-accent {
      background: var(--accent);
      color: var(--primary);
      border-radius: var(--radius-sm);
      padding: 14px 32px;
      font-weight: 700;
      font-size: 16px;
    }

    .btn-accent:hover {
      background: var(--accent-light);
      box-shadow: 0 0 12px rgba(212,168,83,0.5);
    }

    /* 痛点 */
    #pain-points {
      background: var(--dark-bg);
      color: white;
    }

    .pain-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 24px;
    }

    .pain-card {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--radius-md);
      padding: 32px;
    }

    .pain-icon {
      font-size: 28px;
      color: #E07B54;
      margin-bottom: 16px;
    }

    .pain-title {
      font-size: 20px;
      margin-bottom: 12px;
      font-weight: 600;
    }

    .pain-desc {
      color: rgba(255,255,255,0.7);
      font-size: 15px;
    }

    /* 解决方案 */
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .solution-card {
      background: var(--white);
      padding: 32px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      transition: all 0.3s;
      border: 1px solid transparent;
    }

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

    .solution-icon {
      width: 64px;
      height: 64px;
      margin-bottom: 20px;
      color: var(--primary);
    }

    .solution-title {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 12px;
    }

    /* 优势 */
    .advantage-row {
      display: flex;
      gap: 32px;
      justify-content: space-around;
      flex-wrap: wrap;
      text-align: center;
    }

    .advantage-item .big-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--success);
      line-height: 1.2;
    }

    /* 成果 */
    #results {
      background: var(--bg);
    }

    .stats-grid {
      display: flex;
      gap: 32px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .stat-item {
      text-align: center;
    }

    .progress-bar {
      width: 200px;
      height: 6px;
      background: var(--border);
      border-radius: 3px;
      margin: 12px auto 0;
    }

    .progress-fill {
      height: 100%;
      background: var(--success);
      border-radius: 3px;
      width: 0%;
    }

    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
    }

    .testimonial-card {
      background: white;
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--accent);
    }

    .quote {
      font-style: italic;
      margin-bottom: 24px;
      color: var(--text);
    }

    .author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .avatar {
      width: 48px;
      height: 48px;
      background: #ccc;
      border-radius: 50%;
      background-image: url('/assets/images/coverpic/cover-4.webp');
      background-size: cover;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border);
      padding: 20px 0;
    }

    .faq-question {
      font-weight: 600;
      font-size: 18px;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-secondary);
      font-size: 16px;
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-top: 12px;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: var(--primary);
      color: white;
      text-align: center;
      padding: 80px 0;
    }

    /* Footer */
    .site-footer {
      background: var(--dark-bg);
      color: rgba(255,255,255,0.7);
      padding: 60px 0 20px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 32px;
      margin-bottom: 40px;
    }

    .footer-links a {
      display: block;
      font-size: 14px;
      margin-bottom: 8px;
      color: rgba(255,255,255,0.65);
    }

    .footer-links a:hover {
      color: var(--accent);
    }

    .copyright {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 20px;
      text-align: center;
      font-size: 13px;
    }

    @media (max-width: 1024px) {
      .hero-title { font-size: 38px; }
    }

    @media (max-width: 768px) {
      .nav-links, .header-actions .search-box, .header-actions .btn-primary {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        background: white;
        width: 100%;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
      }
      .mobile-menu.active {
        display: flex;
      }
      section {
        padding: 60px 0;
      }
    }