/* roulang page: index */
:root {
      --primary: #0A4B3A;
      --primary-light: #0e6b4f;
      --primary-dark: #07382b;
      --secondary: #D4A843;
      --secondary-dark: #B88D2E;
      --accent: #E65100;
      --bg: #F7F8F9;
      --text: #1E2B2C;
      --text-heading: #0A3B2E;
      --text-light: #5F6C6E;
      --white: #FFFFFF;
      --card-bg: #FFFFFF;
      --card-shadow: rgba(10, 75, 58, 0.04);
      --card-shadow-hover: rgba(10, 75, 58, 0.12);
      --border: #E0E4E6;
      --radius: 12px;
      --radius-btn: 8px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
      --transition: 0.2s ease;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    
    h1, h2, h3, h4 {
      color: var(--text-heading);
      font-weight: 600;
      line-height: 1.3;
    }
    
    h1 {
      font-size: 36px;
      letter-spacing: -0.5px;
      font-weight: 700;
    }
    
    h2 {
      font-size: 28px;
      font-weight: 600;
    }
    
    h3 {
      font-size: 22px;
      font-weight: 600;
    }
    
    a {
      text-decoration: none;
      color: inherit;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      font-weight: 600;
      transition: var(--transition);
    }
    
    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(8px);
      box-shadow: 0 1px 4px rgba(0,0,0,0.04);
      z-index: 100;
      transition: background 0.3s ease, box-shadow 0.3s ease;
      height: 72px;
      display: flex;
      align-items: center;
    }
    
    .header.scrolled {
      background: rgba(255,255,255,0.98);
      box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    }
    
    .nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 24px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.3px;
    }
    
    .logo i {
      font-size: 28px;
      color: var(--secondary);
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    
    .nav-links a {
      font-weight: 500;
      color: var(--text);
      transition: color 0.2s;
      font-size: 16px;
    }
    
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }
    
    .btn-primary {
      background: var(--secondary);
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      box-shadow: 0 4px 8px rgba(212,168,67,0.25);
      transition: background 0.2s, transform 0.1s;
      display: inline-block;
      text-align: center;
    }
    
    .btn-primary:hover {
      background: var(--secondary-dark);
      box-shadow: 0 6px 14px rgba(184,141,46,0.3);
      transform: translateY(-1px);
    }
    
    .btn-outline {
      border: 2px solid var(--primary);
      color: var(--primary);
      background: transparent;
      padding: 10px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      display: inline-block;
    }
    
    .btn-outline:hover {
      background: rgba(10,75,58,0.05);
    }
    
    .hamburger {
      display: none;
      font-size: 24px;
      color: var(--primary);
      background: none;
      border: none;
    }
    
    /* Hero */
    .hero {
      padding-top: 120px;
      padding-bottom: 60px;
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(180deg, #f7f8f9 0%, #fff 100%);
    }
    
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    
    .hero-content h1 {
      margin-bottom: 20px;
      font-size: 44px;
    }
    
    .hero-sub {
      font-size: 18px;
      color: var(--text-light);
      margin-bottom: 32px;
      max-width: 450px;
      line-height: 1.6;
    }
    
    .hero-image {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: 24px;
      height: 420px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.08);
      position: relative;
      overflow: hidden;
    }
    
    .hero-image::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(10,75,58,0.3) 0%, rgba(212,168,67,0.2) 100%);
    }
    
    /* 痛点区 */
    .section-pain {
      padding: 80px 0;
      background: #f0f2f4;
    }
    
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    
    .pain-card {
      background: var(--white);
      padding: 28px;
      border-radius: var(--radius);
      box-shadow: 0 4px 12px var(--card-shadow);
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    
    .pain-icon {
      color: var(--accent);
      font-size: 28px;
      margin-top: 3px;
    }
    
    .pain-text h3 {
      font-size: 20px;
      margin-bottom: 8px;
    }
    
    /* 解决方案 */
    .section-solutions {
      padding: 80px 0;
    }
    
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-top: 40px;
    }
    
    .solution-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: 0 4px 12px var(--card-shadow);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    
    .solution-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 8px 24px var(--card-shadow-hover);
    }
    
    .card-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      transition: transform 0.3s;
    }
    
    .solution-card:hover .card-img {
      transform: scale(1.03);
    }
    
    .card-body {
      padding: 24px;
    }
    
    .card-body h3 {
      margin-bottom: 10px;
    }
    
    .feature-list {
      list-style: none;
      margin-top: 12px;
    }
    
    .feature-list li {
      margin-bottom: 6px;
      display: flex;
      align-items: baseline;
      gap: 8px;
    }
    
    .feature-list i {
      color: var(--secondary);
      font-size: 14px;
    }
    
    /* 数据成果 */
    .section-results {
      background: linear-gradient(120deg, #0A4B3A 0%, #0a3e30 100%);
      padding: 70px 0;
      color: white;
    }
    
    .results-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    
    .stat-number {
      font-size: 40px;
      font-weight: 700;
      color: var(--secondary);
      font-family: "Inter", system-ui, sans-serif;
    }
    
    .stat-label {
      color: rgba(255,255,255,0.8);
      margin-top: 8px;
    }
    
    /* 证言 */
    .section-testimonials {
      padding: 80px 0;
    }
    
    .testimonial-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding: 20px 0;
      scroll-snap-type: x mandatory;
    }
    
    .testimonial-card {
      min-width: 320px;
      background: var(--white);
      border-left: 5px solid var(--secondary);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: 0 4px 12px var(--card-shadow);
      scroll-snap-align: start;
    }
    
    .quote-icon {
      color: var(--secondary);
      font-size: 28px;
      margin-bottom: 12px;
    }
    
    /* FAQ */
    .section-faq {
      padding: 80px 0;
      max-width: 800px;
      margin: 0 auto;
    }
    
    .faq-item {
      border: 1px solid var(--border);
      border-radius: 8px;
      margin-bottom: 12px;
      background: white;
    }
    
    .faq-question {
      padding: 18px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: transparent;
      width: 100%;
      text-align: left;
      font-size: 17px;
      color: var(--text-heading);
    }
    
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: rgba(10,75,58,0.02);
      padding: 0 24px;
    }
    
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 24px;
    }
    
    .faq-dot {
      display: inline-block;
      width: 10px;
      height: 10px;
      background: var(--secondary);
      border-radius: 50%;
      margin-right: 10px;
    }
    
    /* CTA */
    .section-cta {
      background: var(--primary);
      padding: 80px 0;
      text-align: center;
      color: white;
    }
    
    .cta-title {
      color: white;
      font-size: 36px;
    }
    
    .cta-sub {
      color: rgba(255,255,255,0.8);
      margin: 16px 0 32px;
    }
    
    .cta-buttons {
      display: flex;
      justify-content: center;
      gap: 20px;
      flex-wrap: wrap;
    }
    
    .subscribe-form {
      display: flex;
      max-width: 420px;
      margin: 30px auto 0;
    }
    
    .subscribe-form input {
      flex: 1;
      padding: 14px;
      border: 1px solid #D1D5D6;
      border-radius: 6px 0 0 6px;
      outline: none;
    }
    
    .subscribe-form input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(10,75,58,0.1);
    }
    
    .subscribe-form button {
      border-radius: 0 6px 6px 0;
    }
    
    /* Footer */
    .footer {
      background: #1E2B2C;
      color: #B0B8BA;
      padding: 60px 0 30px;
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
    }
    
    .footer h4 {
      color: white;
      margin-bottom: 16px;
    }
    
    .footer a {
      color: #B0B8BA;
      display: block;
      margin-bottom: 8px;
    }
    
    .copyright {
      border-top: 1px solid #2d3a3b;
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      font-size: 14px;
    }
    
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .results-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 20px 30px rgba(0,0,0,0.1);
        display: none;
      }
      .mobile-menu.open {
        display: flex;
      }
      .pain-grid {
        grid-template-columns: 1fr;
      }
      .solutions-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }