/* roulang page: index */
:root {
      --primary-green: #1B8A3D;
      --primary-dark: #146B30;
      --accent-gold: #E8A817;
      --deep-bg: #0F1F14;
      --light-bg: #F7F5F0;
      --soft-green-bg: #F0F7F2;
      --text-main: #1E1E1E;
      --text-secondary: #5C5C5C;
      --text-on-dark: #FFFFFF;
      --white: #FFFFFF;
      --card-shadow: 0 4px 20px rgba(27, 138, 61, 0.08);
      --card-hover-shadow: 0 8px 30px rgba(27, 138, 61, 0.15);
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --border-radius-chip: 20px;
      --transition-smooth: all 0.25s ease;
      --font-stack: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-stack);
      background-color: var(--light-bg);
      color: var(--text-main);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, h5, h6 {
      font-weight: 600;
      margin-top: 0;
    }

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

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 导航栏 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      z-index: 100;
      box-shadow: 0 2px 12px rgba(0,0,0,0.03);
      transition: background 0.3s;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(27,138,61,0.1);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary-green);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo i {
      font-size: 1.8rem;
      color: var(--accent-gold);
    }
    .domain-tag {
      font-size: 0.7rem;
      color: var(--text-secondary);
      margin-left: 8px;
      font-weight: 400;
      letter-spacing: 0.3px;
    }

    .nav-chips {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      justify-content: center;
    }

    .chip {
      background: #E6F2EA;
      color: var(--primary-green);
      padding: 8px 18px;
      border-radius: var(--border-radius-chip);
      font-weight: 500;
      font-size: 0.9rem;
      transition: var(--transition-smooth);
      border: 1px solid transparent;
      white-space: nowrap;
    }
    .chip:hover {
      border-color: var(--accent-gold);
      background: #fff;
      color: var(--primary-dark);
    }
    .chip.active {
      background: var(--primary-green);
      color: white;
      border-color: var(--primary-green);
    }

    .header-cta {
      background: var(--primary-green);
      color: white;
      padding: 10px 24px;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      font-size: 0.9rem;
      transition: var(--transition-smooth);
      white-space: nowrap;
      border: none;
      cursor: pointer;
    }
    .header-cta:hover {
      background: var(--primary-dark);
      color: white;
    }

    .mobile-menu-toggle {
      display: none;
      font-size: 1.8rem;
      color: var(--primary-green);
      cursor: pointer;
    }

    /* 板块间距 */
    section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--text-main);
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60px;
      height: 4px;
      background: var(--accent-gold);
      border-radius: 2px;
    }
    .section-sub {
      color: var(--text-secondary);
      font-size: 1.1rem;
      margin-bottom: 48px;
    }

    /* Hero */
    #hero {
      height: 100vh;
      min-height: 700px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      display: flex;
      align-items: center;
      color: white;
      margin-top: 0;
      padding-top: 72px;
    }
    .hero-overlay {
      position: absolute;
      top:0;left:0;width:100%;height:100%;
      background: linear-gradient(180deg, rgba(15,31,20,0.7) 0%, rgba(15,31,20,0.85) 100%);
    }
    .hero-content {
      position: relative;
      max-width: 700px;
      margin-left: 8%;
    }
    .hero-content h1 {
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 24px;
      color: white;
    }
    .hero-content p {
      font-size: 1.2rem;
      margin-bottom: 32px;
      opacity: 0.9;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-green);
      color: white;
      padding: 14px 32px;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      border: none;
      transition: var(--transition-smooth);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
    }
    .btn-outline-gold {
      background: transparent;
      color: var(--accent-gold);
      border: 2px solid var(--accent-gold);
      padding: 14px 32px;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      transition: var(--transition-smooth);
    }
    .btn-outline-gold:hover {
      background: var(--accent-gold);
      color: #1E1E1E;
    }

    /* 解决方案 */
    .solution-grid {
      display: flex;
      gap: 60px;
      align-items: center;
      flex-wrap: wrap;
    }
    .solution-text {
      flex: 1 1 400px;
    }
    .solution-image {
      flex: 1 1 400px;
    }
    .pain-list {
      list-style: none;
      padding: 0;
    }
    .pain-item {
      display: flex;
      gap: 16px;
      margin-bottom: 28px;
    }
    .pain-icon {
      font-size: 1.6rem;
      color: var(--primary-green);
      margin-top: 4px;
    }

    /* 数据卡片 */
    .stats-grid {
      display: flex;
      gap: 30px;
      flex-wrap: wrap;
      justify-content: center;
      margin-top: 30px;
    }
    .stat-card {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(4px);
      padding: 32px 24px;
      border-radius: var(--border-radius-card);
      text-align: center;
      flex: 1 1 200px;
      border: 1px solid rgba(255,255,255,0.15);
    }
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent-gold);
    }

    /* 证言 */
    .testimonial-grid {
      display: flex;
      gap: 30px;
      overflow-x: auto;
      padding-bottom: 20px;
    }
    .testimonial-card {
      background: white;
      border-left: 4px solid var(--accent-gold);
      padding: 28px;
      border-radius: var(--border-radius-card);
      box-shadow: var(--card-shadow);
      min-width: 280px;
      flex: 1;
    }
    .quote {
      font-style: italic;
      margin-bottom: 20px;
    }

    /* FAQ */
    .accordion-item {
      background: white;
      border-radius: 8px;
      margin-bottom: 12px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }
    .accordion-title {
      background: #F0F7F2;
      padding: 18px 24px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* CTA */
    .cta-block {
      background: var(--primary-green);
      text-align: center;
      padding: 80px 0;
    }

    /* 页脚 */
    .footer-grid {
      display: flex;
      gap: 40px;
      flex-wrap: wrap;
      justify-content: space-between;
    }

    @media (max-width: 1024px) {
      .nav-chips { display: none; }
      .mobile-menu-toggle { display: block; }
      .hero-content h1 { font-size: 2.4rem; }
    }

    @media (max-width: 640px) {
      section { padding: 60px 0; }
      .hero-content { margin-left: 5%; }
    }