/* roulang page: index */
:root {
      --primary: #C8963E;
      --primary-deep: #B07D2E;
      --secondary: #3A2C2B;
      --bg-warm: #F9F6F1;
      --bg-light: #F3EFE8;
      --accent: #D4453A;
      --accent-deep: #B8372F;
      --text-dark: #1F1B1A;
      --text-muted: #5A5352;
      --success: #5B8C5A;
      --white: #FFFFFF;
      --border-light: rgba(200, 150, 62, 0.15);
      --shadow-sm: 0 4px 20px rgba(58, 44, 43, 0.06);
      --shadow-md: 0 8px 30px rgba(58, 44, 43, 0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --font-heading: 'Noto Serif SC', 'ZCOOL XiaoWei', serif;
      --font-body: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      --transition: all 0.25s ease;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: var(--font-body);
      line-height: 1.7;
      color: var(--text-dark);
      background-color: var(--bg-warm);
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, textarea {
      font-family: var(--font-body);
      font-size: 1rem;
      outline: none;
    }
    h1, h2, h3 {
      font-family: var(--font-heading);
      font-weight: 700;
      line-height: 1.3;
    }
    h1 {
      font-size: 3.2rem;
      color: var(--text-dark);
    }
    h2 {
      font-size: 2.2rem;
      margin-bottom: 1.2rem;
      position: relative;
      display: inline-block;
    }
    h2::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 60px;
      height: 4px;
      background: var(--primary);
      border-radius: 2px;
    }
    h3 {
      font-size: 1.5rem;
      color: var(--secondary);
    }
    .section {
      padding: 90px 0;
    }
    .text-center {
      text-align: center;
    }
    .text-center h2::after {
      left: 50%;
      transform: translateX(-50%);
    }
    /* 按钮体系 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      border: none;
      font-size: 1rem;
      gap: 8px;
    }
    .btn-primary {
      background: var(--primary);
      color: var(--white);
      box-shadow: 0 4px 12px rgba(200, 150, 62, 0.3);
    }
    .btn-primary:hover {
      background: var(--primary-deep);
      box-shadow: 0 0 0 4px rgba(200, 150, 62, 0.3);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
    }
    .btn-outline:hover {
      background: rgba(200, 150, 62, 0.1);
      border-color: var(--primary-deep);
      color: var(--primary-deep);
    }
    .btn-accent {
      background: var(--accent);
      color: white;
      box-shadow: 0 4px 12px rgba(212, 69, 58, 0.3);
    }
    .btn-accent:hover {
      background: var(--accent-deep);
      transform: scale(1.02);
    }
    /* 导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(249, 246, 241, 0.92);
      backdrop-filter: blur(12px);
      height: 72px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid var(--border-light);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo {
      font-family: var(--font-heading);
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 1px;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      color: var(--text-muted);
      font-weight: 500;
      padding: 8px 0;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
      border-bottom-color: var(--primary);
    }
    .mobile-nav {
      display: none;
    }
    /* 首屏 Hero */
    .hero {
      display: flex;
      align-items: center;
      gap: 48px;
      min-height: 85vh;
      padding: 40px 0 80px;
      background: var(--bg-warm);
    }
    .hero-left {
      flex: 1 1 50%;
    }
    .hero-left h1 {
      margin-bottom: 20px;
    }
    .hero-left .subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      max-width: 90%;
    }
    .hero-right {
      flex: 1 1 50%;
      position: relative;
      border-radius: 24px;
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .hero-right img {
      width: 100%;
      height: auto;
      object-fit: cover;
      min-height: 380px;
    }
    .live-badge {
      position: absolute;
      top: 20px;
      right: 20px;
      background: var(--accent);
      color: white;
      padding: 8px 18px;
      border-radius: 40px;
      font-weight: 600;
      font-size: 0.9rem;
      display: flex;
      align-items: center;
      gap: 6px;
      box-shadow: 0 6px 16px rgba(212,69,58,0.4);
      animation: pulse 1.8s infinite;
    }
    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(212,69,58,0.5); }
      70% { box-shadow: 0 0 0 12px rgba(212,69,58,0); }
      100% { box-shadow: 0 0 0 0 rgba(212,69,58,0); }
    }
    .live-number {
      font-size: 1.5rem;
      font-weight: 700;
      margin-left: 4px;
    }
    /* 指标看板 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      background: var(--white);
      padding: 28px 20px;
      border-radius: var(--radius-card);
      text-align: center;
      box-shadow: var(--shadow-sm);
      border-top: 4px solid var(--primary);
    }
    .metric-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--primary);
      font-family: var(--font-heading);
    }
    .metric-label {
      color: var(--text-muted);
      margin-top: 8px;
      font-size: 0.95rem;
    }
    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }
    .service-card:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
      transform: translateY(-4px);
    }
    .card-img {
      position: relative;
      height: 200px;
      background: #F0EBE3;
      overflow: hidden;
    }
    .card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .card-img-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(200,150,62,0.1) 0%, rgba(58,44,43,0.4) 100%);
      transition: var(--transition);
    }
    .service-card:hover .card-img-overlay {
      background: linear-gradient(180deg, rgba(200,150,62,0.35) 0%, rgba(58,44,43,0.7) 100%);
    }
    .card-body {
      padding: 24px;
    }
    .card-body h3 {
      margin-bottom: 10px;
    }
    .card-body p {
      color: var(--text-muted);
      margin-bottom: 16px;
    }
    .text-link {
      color: var(--primary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .text-link:hover {
      text-decoration: underline;
    }
    /* 对比表 */
    .compare-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      background: var(--secondary);
      padding: 48px;
      border-radius: 24px;
      color: white;
    }
    .compare-col h3 {
      color: var(--primary);
      margin-bottom: 24px;
    }
    .compare-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 18px;
      font-size: 1.05rem;
    }
    .compare-item i {
      width: 24px;
      text-align: center;
    }
    .text-danger {
      color: #E57373;
    }
    .text-success {
      color: var(--success);
    }
    /* FAQ */
    .faq-item {
      background: var(--white);
      border-radius: var(--radius-card);
      margin-bottom: 16px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 28px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: var(--bg-warm);
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: #f3ede2;
    }
    .faq-answer {
      padding: 0 28px 20px;
      color: var(--text-muted);
      line-height: 1.8;
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }
    .faq-item.open .faq-question i {
      transform: rotate(180deg);
    }
    /* CTA 表单 */
    .cta-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      background: var(--secondary);
      padding: 56px;
      border-radius: 24px;
      align-items: center;
      color: white;
    }
    .cta-left h2 {
      color: white;
    }
    .cta-left h2::after {
      background: var(--primary);
    }
    .cta-form input, .cta-form textarea {
      width: 100%;
      padding: 14px;
      margin-bottom: 16px;
      background: rgba(255,255,255,0.1);
      border: 1px solid rgba(255,255,255,0.25);
      border-radius: var(--radius-btn);
      color: white;
    }
    .cta-form input::placeholder, .cta-form textarea::placeholder {
      color: rgba(255,255,255,0.6);
    }
    /* 页脚 */
    .footer {
      background: var(--secondary);
      color: #ddd;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-logo {
      font-family: var(--font-heading);
      font-size: 1.5rem;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .footer a {
      color: #ccc;
    }
    .footer a:hover {
      color: var(--primary);
    }
    .copyright {
      border-top: 1px solid rgba(255,255,255,0.15);
      padding-top: 24px;
      text-align: center;
      font-size: 0.9rem;
    }
    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
    }
    @media (max-width: 1024px) {
      h1 { font-size: 2.5rem; }
      h2 { font-size: 1.9rem; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-nav { display: block; }
      .hero { flex-direction: column; text-align: center; }
      .hero-left .subtitle { max-width: 100%; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .services-grid { grid-template-columns: 1fr; }
      .compare-wrapper { grid-template-columns: 1fr; }
      .cta-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: white;
        border-top: 1px solid #eee;
        justify-content: space-around;
        padding: 8px 0;
        z-index: 60;
        box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
      }
      .mobile-bottom-nav a {
        display: flex;
        flex-direction: column;
        align-items: center;
        font-size: 0.7rem;
        color: var(--text-muted);
      }
      .mobile-bottom-nav a.active {
        color: var(--primary);
      }
      body { padding-bottom: 70px; }
    }
    @media (max-width: 520px) {
      .metrics-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }