/* roulang page: index */
:root {
      --primary: #FF7F50;
      --primary-hover: #E0693A;
      --secondary: #2E8B57;
      --accent-gold: #DAA520;
      --winter-blue: #4682B4;
      --bg-warm: #FDFBF7;
      --text-dark: #2C2C2C;
      --text-muted: #5A5A5A;
      --white: #FFFFFF;
      --gray-light: #F0F0F0;
      --border-light: #E2E2E2;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
      --radius-card: 16px;
      --radius-btn: 30px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, -apple-system, sans-serif;
      --transition: 0.25s ease;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.75;
      letter-spacing: 0.02em;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      display: block;
      max-width: 100%;
      height: auto;
    }
    button, input, select, textarea {
      font-family: inherit;
      font-size: 16px;
      letter-spacing: 0.02em;
    }
    /* 导航 */
    .nav-bar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 40px;
      background: rgba(255,255,255,0.05);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 999;
      transition: background 0.3s, box-shadow 0.3s;
    }
    .nav-bar.scrolled {
      background: rgba(255,255,255,0.95);
      box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    }
    .logo {
      font-weight: 700;
      font-size: 24px;
      color: var(--white);
      letter-spacing: 0.04em;
      transition: color 0.3s;
      white-space: nowrap;
    }
    .nav-bar.scrolled .logo {
      color: var(--text-dark);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      font-size: 16px;
      font-weight: 500;
      color: var(--white);
      position: relative;
      padding-bottom: 4px;
      transition: color 0.2s;
    }
    .nav-bar.scrolled .nav-links a {
      color: var(--text-dark);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--secondary);
      transition: width 0.25s ease;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
      padding: 8px;
    }
    .hamburger span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--white);
      transition: 0.25s;
    }
    .nav-bar.scrolled .hamburger span {
      background: var(--text-dark);
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: rgba(255,127,80,0.96);
      backdrop-filter: blur(10px);
      flex-direction: column;
      align-items: center;
      gap: 24px;
      padding: 40px 0;
      z-index: 998;
    }
    .mobile-menu a {
      color: white;
      font-size: 20px;
      font-weight: 600;
    }
    /* 区块通用 */
    section {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      .nav-bar {
        padding: 0 24px;
      }
    }
    .section-title {
      font-size: 36px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-dark);
    }
    .btn {
      display: inline-block;
      padding: 12px 32px;
      border-radius: 30px;
      font-weight: 600;
      transition: var(--transition);
      cursor: pointer;
      border: 2px solid transparent;
      text-align: center;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      border-color: var(--primary);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      border-color: var(--primary-hover);
    }
    .btn-outline {
      background: transparent;
      color: var(--secondary);
      border-color: var(--secondary);
    }
    .btn-outline:hover {
      background: var(--secondary);
      color: white;
    }
    /* Hero */
    .hero {
      height: 100vh;
      min-height: 700px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat fixed;
      position: relative;
      display: flex;
      align-items: center;
      color: white;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: rgba(0,0,0,0.45);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 24px;
    }
    .hero p {
      font-size: 18px;
      margin-bottom: 36px;
      opacity: 0.9;
    }
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    /* 亮点双栏 */
    .highlight-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }
    .highlight-row.reverse {
      flex-direction: row-reverse;
    }
    .highlight-img {
      flex: 1;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .highlight-img img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    .highlight-text {
      flex: 1;
    }
    .highlight-text h3 {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 16px;
    }
    /* 卡片网格 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 32px;
      margin-top: 40px;
    }
    .card {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .card-img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      transition: transform 0.4s;
    }
    .card:hover .card-img {
      transform: scale(1.05);
    }
    .card-body {
      padding: 24px;
    }
    .card-body h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .tag {
      display: inline-block;
      background: #f0f0f0;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
      color: var(--text-muted);
      margin-right: 8px;
    }
    /* 对比表 */
    .compare-table-wrapper {
      overflow-x: auto;
      margin-top: 32px;
    }
    .compare-table {
      width: 100%;
      min-width: 700px;
      border-collapse: collapse;
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .compare-table th {
      background: var(--primary);
      color: white;
      padding: 20px;
      font-weight: 600;
    }
    .compare-table td, .compare-table th {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-light);
      text-align: center;
    }
    .highlight-col {
      border-left: 4px solid var(--secondary);
      background: #f9faf7;
    }
    .badge-hot {
      background: var(--primary);
      color: white;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      margin-left: 8px;
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      margin-bottom: 8px;
    }
    .faq-question {
      width: 100%;
      background: none;
      border: none;
      padding: 20px 0;
      font-size: 18px;
      font-weight: 500;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      text-align: left;
    }
    .faq-icon {
      font-size: 22px;
      transition: transform 0.3s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s;
      background: #f9f9f9;
      padding: 0 16px;
      border-radius: 8px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    /* CTA 表单 */
    .cta-grid {
      display: flex;
      gap: 60px;
      align-items: center;
      background: linear-gradient(135deg, #f0f7f0 0%, #fff5ee 100%);
      border-radius: 32px;
      padding: 60px;
    }
    .cta-form input, .cta-form select, .cta-form textarea {
      width: 100%;
      padding: 14px;
      border: 1px solid var(--border-light);
      border-radius: 24px;
      margin-bottom: 16px;
      background: white;
      transition: border 0.2s;
    }
    .cta-form input:focus, .cta-form select:focus, .cta-form textarea:focus {
      border-color: var(--primary);
      outline: none;
    }
    .footer {
      background: #2C2C2C;
      color: #CCCCCC;
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
    }
    .footer a:hover {
      color: var(--primary);
    }
    @media (max-width: 1024px) {
      .highlight-row {
        flex-direction: column;
        gap: 30px;
      }
      .cta-grid {
        flex-direction: column;
        padding: 40px;
      }
      .footer-grid {
        grid-template-columns: repeat(2,1fr);
      }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero h1 { font-size: 36px; }
      .section-title { font-size: 28px; }
    }