/* roulang page: index */
:root {
      --primary: #0B6E4F;
      --primary-light: #1a8b65;
      --accent: #F4A261;
      --accent-hover: #E08C3A;
      --gold: #E9C46A;
      --bg: #FBF7F0;
      --text: #1E2B2F;
      --text-soft: #4a5a5e;
      --card-bg: #FFFFFF;
      --card-shadow: 0 8px 30px rgba(11, 110, 79, 0.08);
      --card-shadow-hover: 0 12px 40px rgba(11, 110, 79, 0.15);
      --radius-card: 16px;
      --radius-btn: 12px;
      --radius-input: 8px;
      --radius-badge: 40px;
      --font-title: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-body: 'Inter', 'Noto Sans SC', sans-serif;
      --transition: 0.25s ease;
    }

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

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

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

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

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

    button, .btn {
      cursor: pointer;
      font-family: var(--font-title);
      font-weight: 600;
      border: none;
      outline: none;
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: var(--radius-btn);
    }

    h1, h2, h3 {
      font-family: var(--font-title);
      font-weight: 700;
    }

    h1 {
      font-size: 48px;
      letter-spacing: -0.5px;
      line-height: 1.2;
    }

    h2 {
      font-size: 36px;
    }

    h3 {
      font-size: 22px;
      font-weight: 600;
    }

    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(8px);
      transition: box-shadow 0.3s ease, background 0.3s ease;
    }

    .header.scrolled {
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      background: #fff;
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

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

    .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--primary);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 20px;
    }

    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }

    .nav-links a {
      font-weight: 600;
      color: var(--text);
      font-size: 15px;
      padding: 8px 0;
      border-bottom: 2px solid transparent;
    }

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

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      width: 32px;
    }

    .hamburger span {
      display: block;
      height: 3px;
      background: var(--text);
      border-radius: 3px;
      transition: var(--transition);
    }

    /* 移动端菜单 */
    .mobile-menu {
      display: none;
      flex-direction: column;
      background: white;
      padding: 16px 24px;
      gap: 12px;
      box-shadow: 0 12px 24px rgba(0,0,0,0.05);
      border-radius: 0 0 20px 20px;
    }

    .mobile-menu a {
      font-weight: 600;
      padding: 8px 0;
      color: var(--text);
      border-bottom: 1px solid #eee;
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
      color: white;
      padding: 140px 0 100px;
      margin-top: 0;
      position: relative;
      overflow: hidden;
    }

    .hero .container {
      display: flex;
      align-items: center;
      gap: 48px;
    }

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

    .hero-text h1 {
      margin-bottom: 20px;
    }

    .hero-text p {
      font-size: 18px;
      opacity: 0.9;
      margin-bottom: 32px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--accent);
      color: white;
      padding: 14px 32px;
      font-size: 16px;
    }

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

    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 12px 32px;
    }

    .btn-outline:hover {
      background: white;
      color: var(--primary);
    }

    .hero-visual {
      flex: 1 1 50%;
      display: flex;
      justify-content: center;
      align-items: center;
      position: relative;
    }

    .badge-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
    }

    .stat-badge {
      background: rgba(255,255,255,0.18);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-badge);
      padding: 20px 24px;
      text-align: center;
      color: white;
      font-weight: 700;
    }

    .stat-badge .number {
      font-size: 36px;
      font-weight: 800;
      font-family: 'Inter', sans-serif;
      display: block;
    }

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

    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-title h2 {
      margin-bottom: 12px;
    }

    .section-title p {
      color: var(--text-soft);
      max-width: 600px;
      margin: 0 auto;
    }

    /* 痛点 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .pain-card {
      background: #F0F6F4;
      border-radius: var(--radius-card);
      padding: 28px;
      display: flex;
      align-items: flex-start;
      gap: 20px;
      border: 1px solid transparent;
      transition: var(--transition);
    }

    .pain-card:hover {
      border-color: var(--primary);
      box-shadow: var(--card-shadow);
    }

    .pain-icon {
      font-size: 28px;
      color: var(--primary);
    }

    /* 解决方案 */
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .solution-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      text-align: center;
    }

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

    .solution-icon {
      font-size: 40px;
      margin-bottom: 16px;
    }

    .feature-list {
      text-align: left;
      margin-top: 16px;
      list-style: none;
    }

    .feature-list li::before {
      content: "✓";
      color: var(--primary);
      margin-right: 8px;
      font-weight: bold;
    }

    /* 成果数据 */
    .stats-wall {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 32px;
    }

    .stat-item {
      background: var(--primary);
      color: white;
      border-radius: 50%;
      width: 140px;
      height: 140px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-weight: 800;
    }

    .stat-item .number {
      font-size: 38px;
      font-family: 'Inter', sans-serif;
    }

    .stat-item .label {
      color: var(--gold);
      font-size: 14px;
    }

    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--card-shadow);
    }

    .stars {
      color: var(--accent);
      margin-bottom: 12px;
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }

    details {
      background: white;
      border-radius: var(--radius-card);
      margin-bottom: 12px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.02);
    }

    details[open] {
      background: #F4FAF7;
      box-shadow: var(--card-shadow);
    }

    summary {
      padding: 20px 24px;
      font-weight: 700;
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
    }

    summary::after {
      content: "▾";
      transition: 0.2s;
    }

    details[open] summary::after {
      transform: rotate(180deg);
    }

    .faq-content {
      padding: 0 24px 20px;
      border-left: 3px solid var(--primary);
      margin-left: 24px;
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
      color: white;
      text-align: center;
      padding: 80px 24px;
    }

    .cta-btn {
      background: white;
      color: var(--primary);
      padding: 18px 48px;
      font-size: 18px;
      margin: 24px 0;
    }

    /* Footer */
    .footer {
      background: var(--primary);
      color: rgba(255,255,255,0.9);
      padding: 48px 0 24px;
    }

    .footer-grid {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 32px;
    }

    .footer-links a {
      display: block;
      color: rgba(255,255,255,0.8);
      margin-bottom: 8px;
    }

    .copyright {
      text-align: center;
      margin-top: 32px;
      opacity: 0.7;
    }

    @media (max-width: 1024px) {
      h1 { font-size: 40px; }
      .solution-grid { grid-template-columns: 1fr 1fr; }
      .hero .container { flex-direction: column; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .mobile-menu.active { display: flex; }
      h1 { font-size: 32px; }
      h2 { font-size: 28px; }
      .pain-grid,
      .testimonial-grid { grid-template-columns: 1fr; }
      .solution-grid { grid-template-columns: 1fr; }
      .stats-wall { gap: 20px; }
      .stat-item { width: 110px; height: 110px; }
    }