/* roulang page: index */
* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --primary: #0A3D2E;
      --primary-hover: #0F5B45;
      --accent: #D4AF37;
      --bg: #FAF9F6;
      --bg-alt: #F0F4F2;
      --text-dark: #1A1A1A;
      --text-body: #4A4A4A;
      --text-muted: #7A7A7A;
      --white: #FFFFFF;
      --card-shadow: 0 2px 12px rgba(0,0,0,0.04);
      --card-hover-shadow: 0 8px 24px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-container: 16px;
      --spacing-section: 100px;
      --spacing-element: 24px;
      --max-width: 1280px;
      --nav-height: 72px;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--bg);
      color: var(--text-body);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 40px;
    }
    h1, h2, h3 {
      font-weight: 700;
      color: var(--text-dark);
    }
    h1 {
      font-size: 48px;
      line-height: 1.2;
    }
    h2 {
      font-size: 36px;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    h3 {
      font-size: 20px;
      line-height: 1.4;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      background: none;
      font-weight: 600;
      transition: all 0.3s ease;
    }
    /* 导航 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255,255,255,0.96);
      backdrop-filter: blur(8px);
      height: var(--nav-height);
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
      display: flex;
      align-items: center;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      font-size: 22px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 1px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-menu a {
      font-size: 15px;
      color: var(--text-body);
      position: relative;
      padding: 8px 0;
      font-weight: 500;
      transition: color 0.2s;
    }
    .nav-menu a:hover {
      color: var(--primary);
    }
    .nav-menu a.active {
      color: var(--primary);
      font-weight: 600;
    }
    .nav-menu a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
    }
    .btn-outline-gold {
      border: 1px solid var(--accent);
      color: var(--primary);
      background: transparent;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.25s;
    }
    .btn-outline-gold:hover {
      background: #fdf3d3;
      border-color: #c9a030;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }
    .mobile-nav {
      display: none;
    }
    /* Hero */
    .hero {
      background: radial-gradient(circle at 30% 40%, #0A3D2E 0%, #03140f 100%);
      color: var(--white);
      padding: 120px 0;
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: center;
      min-height: 85vh;
    }
    .hero-bg-lines {
      position: absolute;
      inset: 0;
      pointer-events: none;
      background: repeating-linear-gradient(45deg, rgba(212,175,55,0.08) 0px, rgba(212,175,55,0.08) 2px, transparent 2px, transparent 8px);
      opacity: 0.25;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 750px;
    }
    .hero h1 {
      color: var(--white);
      font-size: 52px;
      margin-bottom: 20px;
    }
    .hero .highlight {
      color: var(--accent);
    }
    .hero p {
      font-size: 18px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 36px;
      max-width: 600px;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      border: none;
      transition: background 0.2s;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    /* 板块通用 */
    section {
      padding: var(--spacing-section) 0;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header h2 {
      margin-bottom: 8px;
    }
    .section-header .subtitle {
      color: var(--text-muted);
      font-size: 16px;
    }
    .bg-alt {
      background-color: var(--bg-alt);
    }
    /* 服务卡片 2+1错落 */
    .services-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1.2fr;
      gap: 24px;
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--card-shadow);
      transition: all 0.3s;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-hover-shadow);
    }
    .service-icon {
      font-size: 28px;
      color: var(--accent);
      margin-bottom: 16px;
    }
    .service-card h3 {
      margin-bottom: 8px;
    }
    /* 优势数据带 */
    .stats-wrapper {
      background: var(--bg-alt);
      border-radius: var(--radius-container);
      padding: 48px 40px;
    }
    .stats-grid {
      display: flex;
      justify-content: space-around;
      text-align: center;
      flex-wrap: wrap;
      gap: 24px;
    }
    .stat-item .stat-number {
      font-family: "DIN Alternate", "Helvetica Neue", sans-serif;
      font-size: 48px;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.2;
    }
    .stat-item .stat-label {
      color: var(--text-muted);
      font-size: 15px;
    }
    /* 案例区 */
    .case-row {
      display: flex;
      gap: 40px;
      align-items: center;
      margin-bottom: 60px;
    }
    .case-row.reverse {
      flex-direction: row-reverse;
    }
    .case-img {
      flex: 1;
      border-radius: var(--radius-card);
      overflow: hidden;
      position: relative;
      background: #0A3D2E;
    }
    .case-img img {
      width: 100%;
      height: 280px;
      object-fit: cover;
    }
    .case-tag {
      position: absolute;
      top: 16px;
      left: 16px;
      background: var(--accent);
      color: #1A1A1A;
      font-weight: 600;
      font-size: 13px;
      padding: 4px 12px;
      border-radius: 20px;
    }
    .case-text {
      flex: 1;
    }
    .case-text h3 {
      margin-bottom: 12px;
    }
    /* 流程时间轴 */
    .timeline {
      display: flex;
      flex-direction: column;
      gap: 32px;
    }
    .timeline-step {
      display: flex;
      gap: 24px;
      align-items: baseline;
    }
    .step-marker {
      width: 40px;
      height: 40px;
      background: var(--primary);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      flex-shrink: 0;
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid #e0e0e0;
      padding: 20px 0;
      cursor: pointer;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      color: var(--text-dark);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-body);
      padding-top: 0;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-top: 12px;
    }
    /* CTA */
    .cta-block {
      background: linear-gradient(135deg, #0A3D2E 0%, #02100b 100%);
      color: white;
      text-align: center;
      padding: 80px 0;
      border-radius: 0;
    }
    .cta-block h2 {
      color: white;
    }
    /* 页脚 */
    .main-footer {
      background: #1A1A1A;
      color: #CCCCCC;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    .footer-grid h4 {
      color: white;
      margin-bottom: 16px;
    }
    .footer-bottom {
      border-top: 1px solid #333;
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      font-size: 14px;
    }
    @media (max-width: 1024px) {
      .container { padding: 0 24px; }
      h1 { font-size: 40px; }
      .services-grid { grid-template-columns: 1fr 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: flex; }
      .mobile-nav.active { display: flex; flex-direction: column; background: white; position: absolute; top: 72px; left: 0; width: 100%; padding: 20px; box-shadow: 0 8px 20px rgba(0,0,0,0.1); }
      .hero { padding: 80px 0; min-height: 70vh; }
      h1 { font-size: 32px; }
      h2 { font-size: 28px; }
      .hero-buttons { flex-direction: column; align-items: flex-start; }
      .services-grid { grid-template-columns: 1fr; }
      .stats-grid { flex-direction: column; }
      .case-row, .case-row.reverse { flex-direction: column; }
      section { padding: 60px 0; }
      .footer-grid { grid-template-columns: 1fr; }
    }