/* roulang page: index */
/* ========== 设计变量与全局重置 ========== */
    :root {
      --primary-green: #0A6E2E;
      --primary-green-light: #A0D9B1;
      --accent-orange: #F15A24;
      --accent-orange-dark: #D94A1A;
      --dark-bg: #1B1B1B;
      --light-bg: #F7F8F9;
      --text-primary: #1E1E1E;
      --text-secondary: #5A5A5A;
      --text-on-dark: #FFFFFF;
      --border-light: #D9D9D9;
      --shadow-card: 0 4px 12px rgba(0,0,0,0.06);
      --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.12);
      --radius-card: 16px;
      --radius-btn: 8px;
      --radius-badge: 20px;
      --transition-default: 0.2s ease;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --max-width: 1200px;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-heading);
      color: var(--text-primary);
      background-color: #fff;
      line-height: 1.7;
      margin: 0;
      padding: 0;
      font-size: 16px;
    }
    
    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition-default);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    button, input, textarea {
      font-family: inherit;
    }
    
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }
    
    /* ========== 导航系统 (杂志频道式) ========== */
    .header {
      background: #fff;
      box-shadow: 0 2px 10px rgba(0,0,0,0.04);
      position: sticky;
      top: 0;
      z-index: 100;
    }
    
    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid rgba(0,0,0,0.05);
    }
    
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 22px;
      color: var(--primary-green);
      letter-spacing: 0.5px;
    }
    
    .logo i {
      font-size: 28px;
    }
    
    .quick-cta-btn {
      background: transparent;
      border: 2px solid var(--accent-orange);
      color: var(--accent-orange);
      padding: 8px 18px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 14px;
      transition: all var(--transition-default);
      cursor: pointer;
      white-space: nowrap;
    }
    
    .quick-cta-btn:hover {
      background: var(--accent-orange);
      color: #fff;
    }
    
    .channel-row {
      background: var(--light-bg);
      padding: 10px 0;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }
    
    .channel-nav {
      display: flex;
      gap: 5px;
      align-items: center;
      min-width: max-content;
      justify-content: flex-start;
      flex-wrap: nowrap;
    }
    
    .channel-nav a {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 16px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 15px;
      color: var(--text-secondary);
      transition: all var(--transition-default);
      position: relative;
      white-space: nowrap;
    }
    
    .channel-nav a i {
      font-size: 6px;
      color: var(--accent-orange);
    }
    
    .channel-nav a:hover,
    .channel-nav a.active {
      color: var(--primary-green);
      background: rgba(10, 110, 46, 0.08);
    }
    
    .channel-nav a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 30px;
      height: 3px;
      background: var(--primary-green);
      border-radius: 3px;
    }
    
    /* 移动端汉堡菜单 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary-green);
      cursor: pointer;
    }
    
    @media (max-width: 640px) {
      .brand-row {
        padding: 10px 20px;
      }
      .menu-toggle {
        display: block;
      }
      .channel-row {
        display: none;
      }
      .channel-row.mobile-open {
        display: block;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        padding: 15px 20px;
      }
      .channel-nav {
        flex-direction: column;
        align-items: flex-start;
      }
    }
    
    /* ========== Hero 首屏 ========== */
    .hero {
      position: relative;
      min-height: 70vh;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      color: #fff;
    }
    
    .hero-overlay {
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(90deg, rgba(27,27,27,0.85) 0%, rgba(27,27,27,0.4) 100%);
    }
    
    .hero-content {
      position: relative;
      max-width: 600px;
      padding: 60px 0;
    }
    
    .hero h1 {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 20px;
      text-shadow: 0 4px 12px rgba(0,0,0,0.3);
      color: #fff;
    }
    
    .hero-subtitle {
      font-size: 20px;
      font-weight: 400;
      margin-bottom: 32px;
      color: rgba(255,255,255,0.9);
    }
    
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    
    .btn-primary {
      background: var(--accent-orange);
      color: #fff;
      border: none;
      padding: 0 28px;
      height: 48px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      letter-spacing: 0.5px;
      cursor: pointer;
      transition: background var(--transition-default);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      text-align: center;
    }
    
    .btn-primary:hover {
      background: var(--accent-orange-dark);
      color: #fff;
    }
    
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--primary-green);
      color: #fff;
      padding: 0 28px;
      height: 48px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: all var(--transition-default);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    
    .btn-secondary:hover {
      background: rgba(10,110,46,0.2);
      border-color: #fff;
      color: #fff;
    }
    
    /* ========== 通用板块 ========== */
    section {
      padding: 80px 0;
    }
    
    .section-title {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-primary);
    }
    
    .section-lead {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 48px;
    }
    
    .bg-light {
      background: var(--light-bg);
    }
    
    /* ========== 卡片系统 ========== */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    
    .card {
      background: #fff;
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition-default);
      border: 1px solid transparent;
      position: relative;
      overflow: hidden;
    }
    
    .card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-card-hover);
      border-image: linear-gradient(135deg, var(--primary-green), var(--accent-orange)) 1;
    }
    
    .card-top-strip {
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 4px;
      background: var(--primary-green);
    }
    
    .card-icon {
      background: rgba(10,110,46,0.1);
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary-green);
      font-size: 24px;
    }
    
    .card h3 {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    
    .card p {
      color: var(--text-secondary);
      line-height: 1.6;
    }
    
    .badge {
      background: var(--accent-orange);
      color: #fff;
      padding: 4px 12px;
      border-radius: var(--radius-badge);
      font-size: 13px;
      font-weight: 600;
      display: inline-block;
      margin-top: 15px;
    }
    
    /* 痛点卡特殊样式 */
    .pain-card .badge {
      background: #1B1B1B;
      margin-bottom: 12px;
    }
    
    /* ========== 成果数据卡 ========== */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      text-align: center;
    }
    
    .stat-item {
      background: #fff;
      padding: 32px 20px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
    }
    
    .stat-number {
      font-size: 42px;
      font-weight: 700;
      color: var(--primary-green);
      display: block;
    }
    
    .stat-label {
      color: var(--text-secondary);
      font-size: 18px;
    }
    
    /* ========== 证言混合布局 ========== */
    .testimonial-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    
    .testimonial-main {
      background: #fff;
      padding: 40px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      font-size: 20px;
      line-height: 1.8;
    }
    
    .testimonial-main .quote-icon {
      color: var(--primary-green);
      font-size: 40px;
      margin-bottom: 16px;
    }
    
    .testimonial-side {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    
    .testimonial-card {
      background: #fff;
      padding: 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
    }
    
    .author {
      font-weight: 600;
      margin-top: 16px;
      color: var(--primary-green);
    }
    
    /* ========== FAQ 手风琴 ========== */
    .accordion-item {
      background: #fff;
      border-radius: 8px;
      margin-bottom: 8px;
      overflow: hidden;
    }
    
    .accordion-header {
      background: var(--light-bg);
      padding: 18px 24px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background var(--transition-default);
    }
    
    .accordion-header:hover {
      background: rgba(10,110,46,0.08);
    }
    
    .accordion-content {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s;
      background: #fff;
      color: var(--text-secondary);
    }
    
    .accordion-item.active .accordion-content {
      padding: 20px 24px;
      max-height: 200px;
    }
    
    /* ========== CTA 与表单 ========== */
    .cta-section {
      background: linear-gradient(135deg, var(--primary-green), #054d20);
      color: #fff;
      text-align: center;
    }
    
    .contact-form {
      max-width: 600px;
      margin: 40px auto 0;
      text-align: left;
    }
    
    .form-input {
      width: 100%;
      padding: 12px 16px;
      border-radius: var(--radius-btn);
      border: 1px solid var(--border-light);
      margin-bottom: 16px;
      font-size: 16px;
      transition: border var(--transition-default);
    }
    
    .form-input:focus {
      outline: none;
      border-color: var(--primary-green);
      box-shadow: 0 0 0 2px rgba(10,110,46,0.2);
    }
    
    /* ========== 页脚 ========== */
    .footer {
      background: var(--dark-bg);
      color: #ddd;
      padding: 60px 0 20px;
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 30px;
    }
    
    .footer-logo {
      font-size: 24px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    
    .tag-cloud a {
      display: inline-block;
      border: 1px solid var(--primary-green-light);
      color: var(--primary-green-light);
      padding: 4px 14px;
      border-radius: 30px;
      margin: 4px;
      font-size: 14px;
      transition: all var(--transition-default);
    }
    
    .tag-cloud a:hover {
      background: var(--primary-green);
      color: #fff;
      border-color: var(--primary-green);
    }
    
    .copyright {
      text-align: center;
      margin-top: 40px;
      color: #aaa;
      font-size: 14px;
    }
    
    /* ========== 响应式设计 ========== */
    @media (max-width: 1024px) {
      .card-grid, .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .testimonial-layout {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    
    @media (max-width: 640px) {
      .hero h1 {
        font-size: 32px;
      }
      .hero-buttons .btn-primary,
      .hero-buttons .btn-secondary {
        width: 100%;
      }
      .card-grid, .stats-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      section {
        padding: 50px 0;
      }
      .btn-primary, .btn-secondary {
        width: 100%;
        justify-content: center;
      }
    }