/* roulang page: index */
:root {
      --primary: #E8453C;
      --primary-dark: #c0392b;
      --secondary: #1A1A2E;
      --accent: #F0A500;
      --bg: #F9F9FB;
      --card-bg: #FFFFFF;
      --text: #2D2D3A;
      --text-light: #6B6B7B;
      --border: #E6E6ED;
      --gradient: linear-gradient(135deg, #E8453C 0%, #F0A500 100%);
      --shadow-sm: 0 8px 30px rgba(0,0,0,0.06);
      --shadow-hover: 0 12px 36px rgba(0,0,0,0.10);
      --radius-card: 16px;
      --radius-btn: 10px;
      --radius-nav: 14px;
      --transition: 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    a {
      text-decoration: none;
      color: inherit;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航栏 - 卡片化控制面板 */
    .top-nav {
      position: sticky;
      top: 16px;
      z-index: 100;
      background: var(--card-bg);
      border-radius: var(--radius-nav);
      box-shadow: var(--shadow-sm);
      padding: 12px 24px;
      margin: 16px auto 0;
      max-width: 1200px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      backdrop-filter: blur(8px);
      transition: var(--transition);
    }
    
    .nav-brand {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .nav-brand i {
      font-size: 1.8rem;
      color: var(--accent);
    }
    
    .nav-links {
      display: flex;
      gap: 12px;
      align-items: center;
    }
    
    .nav-links a {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 8px 16px;
      border-radius: 30px;
      font-weight: 500;
      color: var(--text);
      background: transparent;
      transition: var(--transition);
      font-size: 0.95rem;
    }
    
    .nav-links a i {
      font-size: 1rem;
      color: var(--primary);
    }
    
    .nav-links a:hover {
      background: rgba(232, 69, 60, 0.08);
      color: var(--primary);
    }
    
    .nav-cta {
      background: var(--gradient);
      color: white !important;
      border-radius: 30px;
      padding: 10px 24px;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(232,69,60,0.3);
      transition: var(--transition);
    }
    
    .nav-cta:hover {
      transform: scale(1.03);
      box-shadow: 0 6px 18px rgba(232,69,60,0.4);
      background: linear-gradient(135deg, #c0392b 0%, #d18d00 100%);
    }
    
    /* 汉堡菜单 */
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: var(--text);
      cursor: pointer;
    }
    
    /* Hero */
    .hero {
      background-color: var(--secondary);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      padding: 100px 0 120px;
      position: relative;
      color: white;
      text-align: left;
    }
    
    .hero-content {
      display: flex;
      align-items: center;
      gap: 60px;
      flex-wrap: wrap;
    }
    
    .hero-text {
      flex: 1 1 500px;
    }
    
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 24px;
      color: white;
    }
    
    .hero .subtitle {
      font-size: 20px;
      color: #B0B0C0;
      margin-bottom: 40px;
      max-width: 550px;
    }
    
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    
    .btn-primary {
      background: var(--gradient);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      display: inline-block;
      transition: var(--transition);
      border: none;
      cursor: pointer;
      box-shadow: 0 6px 18px rgba(232,69,60,0.4);
    }
    
    .btn-primary:hover {
      transform: scale(1.03);
      box-shadow: 0 10px 24px rgba(232,69,60,0.5);
      background: linear-gradient(135deg, #c0392b 0%, #d18d00 100%);
    }
    
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--primary);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      display: inline-block;
      transition: var(--transition);
    }
    
    .btn-secondary:hover {
      background: rgba(232,69,60,0.15);
      border-color: var(--accent);
      color: var(--accent);
      transform: translateY(-2px);
    }
    
    .hero-image {
      flex: 1 1 400px;
      text-align: center;
    }
    
    .hero-image img {
      border-radius: 24px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    }
    
    /* 通用板块 */
    .section {
      padding: 100px 0;
    }
    
    .section-title {
      font-size: 36px;
      font-weight: 700;
      margin-bottom: 20px;
      color: var(--text);
      text-align: center;
    }
    
    .section-desc {
      font-size: 18px;
      color: var(--text-light);
      text-align: center;
      max-width: 700px;
      margin: 0 auto 60px;
    }
    
    /* 痛点卡片 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }
    
    .pain-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border-left: 5px solid transparent;
    }
    
    .pain-card:hover {
      box-shadow: var(--shadow-hover);
      border-left-color: var(--primary);
      transform: translateY(-4px);
    }
    
    .pain-icon {
      font-size: 2.2rem;
      color: var(--primary);
      margin-bottom: 20px;
    }
    
    .pain-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    
    /* 解决方案 */
    .solution-row {
      display: flex;
      align-items: center;
      gap: 60px;
      flex-wrap: wrap;
    }
    
    .solution-text {
      flex: 1 1 400px;
    }
    
    .solution-text ul {
      list-style: none;
      padding-left: 0;
    }
    
    .solution-text li {
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    
    .solution-text li i {
      color: var(--primary);
      font-size: 1.1rem;
    }
    
    .solution-image {
      flex: 1 1 400px;
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    
    /* 数据徽章 */
    .badge-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 30px;
      text-align: center;
    }
    
    .badge-item {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 40px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    
    .badge-circle {
      width: 100px;
      height: 100px;
      background: var(--gradient);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      color: white;
      font-size: 40px;
      font-weight: 800;
      transition: var(--transition);
    }
    
    .badge-item:hover .badge-circle {
      transform: rotate(5deg) scale(1.05);
    }
    
    /* 数据见证 */
    .stats-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 40px;
    }
    
    .stat-item {
      text-align: center;
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px 40px;
      box-shadow: var(--shadow-sm);
      min-width: 180px;
    }
    
    .stat-number {
      font-size: 48px;
      font-weight: 800;
      color: var(--primary);
    }
    
    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
    }
    
    .testimonial-card {
      background: #FAFAFC;
      border-radius: var(--radius-card);
      padding: 32px;
      border-left: 4px solid var(--primary);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    
    .testimonial-card:hover {
      box-shadow: var(--shadow-hover);
    }
    
    .testimonial-avatar {
      width: 60px;
      height: 60px;
      background: #ddd;
      border-radius: 50%;
      margin-bottom: 20px;
      background-image: url('/assets/images/coverpic/cover-2.webp');
      background-size: cover;
    }
    
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    
    .faq-item {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      margin-bottom: 16px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    
    .faq-question {
      padding: 24px;
      font-weight: 600;
      font-size: 18px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      border-radius: var(--radius-card);
      background: white;
    }
    
    .faq-answer {
      padding: 0 24px 24px;
      color: var(--text-light);
      display: none;
    }
    
    .faq-item.active .faq-answer {
      display: block;
    }
    
    .faq-item.active {
      border: 1px solid var(--primary);
    }
    
    /* CTA */
    .cta-section {
      background: var(--gradient);
      padding: 80px 0;
      text-align: center;
      color: white;
    }
    
    .cta-title {
      font-size: 40px;
      font-weight: 700;
    }
    
    .cta-btn {
      background: white;
      color: var(--primary);
      padding: 18px 48px;
      border-radius: 12px;
      font-weight: 700;
      font-size: 1.2rem;
      display: inline-block;
      margin-top: 30px;
      transition: var(--transition);
    }
    
    .cta-btn:hover {
      background: #f0f0f0;
      transform: scale(1.03);
    }
    
    /* 页脚 */
    .footer {
      background: var(--secondary);
      color: white;
      padding: 60px 0 30px;
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
      gap: 40px;
      margin-bottom: 40px;
    }
    
    .footer a {
      color: #ccc;
      display: block;
      margin-bottom: 8px;
    }
    
    .footer a:hover {
      color: var(--accent);
    }
    
    .copyright {
      border-top: 1px solid #2d2d3a;
      padding-top: 24px;
      text-align: center;
      color: #aaa;
    }
    
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 20px;
        right: 20px;
        background: white;
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-hover);
        padding: 20px;
      }
      .nav-links.active {
        display: flex;
      }
      .hamburger {
        display: block;
      }
      .hero h1 {
        font-size: 32px;
      }
      .section {
        padding: 60px 0;
      }
      .section-title {
        font-size: 28px;
      }
      .hero-content {
        flex-direction: column;
      }
      .stat-number {
        font-size: 36px;
      }
    }