/* roulang page: index */
:root {
      --primary-deep: #0A1F3F;
      --accent-gold: #C5964A;
      --gold-dark: #B8860B;
      --bg-warm: #F5F3EF;
      --text-dark: #1A1A1A;
      --text-soft: #5A5A5A;
      --text-light: #B0B8C5;
      --card-glass: rgba(255,255,255,0.85);
      --shadow-sm: 0 8px 32px rgba(10,31,63,0.08);
      --shadow-hover: 0 12px 40px rgba(10,31,63,0.15);
      --border-radius-card: 16px;
      --border-radius-btn: 30px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      --transition-smooth: all 0.3s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      font-weight: 700;
      color: var(--primary-deep);
      margin-bottom: 1rem;
      letter-spacing: -0.02em;
    }
    h1 {
      font-size: 3rem;
      line-height: 1.2;
    }
    h2 {
      font-size: 2.25rem;
      margin-bottom: 2.5rem;
      position: relative;
      display: inline-block;
    }
    h2:after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 60px;
      height: 4px;
      background: var(--accent-gold);
      border-radius: 2px;
    }
    h3 {
      font-size: 1.25rem;
      font-weight: 600;
    }
    .section {
      padding: 100px 0;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      transition: var(--transition-smooth);
      background: transparent;
      border-bottom: 1px solid transparent;
    }
    .header.scrolled {
      background: rgba(10,31,63,0.95);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--accent-gold);
      box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      max-width: 1200px;
      margin: 0 auto;
      padding: 12px 24px;
    }
    .logo {
      font-family: var(--font-heading);
      font-size: 1.8rem;
      font-weight: 700;
      color: white;
      letter-spacing: 1px;
      text-decoration: none;
      display: flex;
      align-items: center;
      transition: var(--transition-smooth);
    }
    .logo span {
      color: var(--accent-gold);
      font-weight: 800;
      margin-right: 4px;
    }
    .header.scrolled .logo {
      color: white;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
      margin: 0;
    }
    .nav-links a {
      color: rgba(255,255,255,0.9);
      text-decoration: none;
      font-weight: 500;
      font-size: 1rem;
      transition: var(--transition-smooth);
      padding-bottom: 4px;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-gold);
      border-bottom-color: var(--accent-gold);
    }
    .btn-nav {
      background: var(--accent-gold);
      color: white !important;
      padding: 10px 24px !important;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      border: none;
      transition: var(--transition-smooth);
      text-decoration: none;
      display: inline-block;
      margin-left: 1rem;
    }
    .btn-nav:hover {
      background: var(--gold-dark);
      box-shadow: 0 0 18px rgba(197,150,74,0.6);
      color: white !important;
    }
    .menu-icon {
      display: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }
    /* Hero */
    .hero {
      height: 100vh;
      min-height: 700px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-blend-mode: overlay;
      background-color: rgba(10,31,63,0.65);
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .hero-content {
      max-width: 900px;
      padding: 0 24px;
      color: white;
      position: relative;
      z-index: 2;
    }
    .hero h1 {
      color: white;
      font-size: 3.5rem;
      text-shadow: 0 4px 20px rgba(0,0,0,0.4);
      margin-bottom: 1.5rem;
    }
    .hero .subtitle {
      font-size: 1.25rem;
      color: rgba(255,255,255,0.9);
      margin-bottom: 2.5rem;
      font-weight: 400;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent-gold);
      color: white;
      padding: 14px 36px;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition-smooth);
      border: none;
      display: inline-block;
    }
    .btn-primary:hover {
      background: var(--gold-dark);
      box-shadow: 0 0 20px rgba(197,150,74,0.7);
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 14px 36px;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition-smooth);
    }
    .btn-outline:hover {
      background: var(--accent-gold);
      color: white;
    }
    /* 业务卡片 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
    }
    .service-card {
      background: var(--card-glass);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: var(--border-radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
      border: 1px solid rgba(197,150,74,0.1);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      font-size: 2.4rem;
      color: var(--accent-gold);
      margin-bottom: 20px;
    }
    .service-card h3 {
      margin-bottom: 12px;
    }
    .service-card p {
      color: var(--text-soft);
      margin-bottom: 20px;
    }
    .text-link {
      color: var(--accent-gold);
      font-weight: 600;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition-smooth);
    }
    .text-link i {
      transition: transform 0.2s;
    }
    .text-link:hover {
      color: var(--gold-dark);
    }
    .text-link:hover i {
      transform: translateX(6px);
    }
    /* 数据 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .stat-item .number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent-gold);
      line-height: 1.2;
    }
    .stat-item .label {
      color: var(--text-soft);
      font-weight: 500;
    }
    /* 案例 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .case-card {
      background: white;
      border-radius: var(--border-radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .case-img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    .case-text {
      padding: 24px;
    }
    /* 流程 */
    .process-steps {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      position: relative;
    }
    .step {
      text-align: center;
      flex: 1;
      position: relative;
      z-index: 2;
    }
    .step-circle {
      width: 60px;
      height: 60px;
      background: var(--accent-gold);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.8rem;
      font-weight: 700;
      margin: 0 auto 20px;
    }
    .process-steps::before {
      content: '';
      position: absolute;
      top: 30px;
      left: 10%;
      width: 80%;
      height: 2px;
      border-top: 2px dashed var(--accent-gold);
      z-index: 1;
      opacity: 0.6;
    }
    /* FAQ */
    .accordion-item {
      background: white;
      border-radius: 12px;
      margin-bottom: 16px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.04);
    }
    .accordion-title {
      background: #f9f7f4;
      padding: 20px 24px;
      font-weight: 600;
      color: var(--primary-deep);
      border-left: 4px solid var(--accent-gold);
      cursor: pointer;
      transition: 0.2s;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .accordion-content {
      padding: 0 24px 20px;
      color: var(--text-soft);
    }
    /* CTA 横幅 */
    .cta-banner {
      background: var(--primary-deep);
      padding: 80px 0;
      text-align: center;
      position: relative;
    }
    .cta-banner h2 {
      color: white;
    }
    .cta-banner h2:after {
      background: var(--accent-gold);
      left: 50%;
      transform: translateX(-50%);
    }
    /* 页脚 */
    .footer {
      background: #0A1F3F;
      color: #B0B8C5;
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    .footer h4 {
      color: white;
      margin-bottom: 20px;
    }
    .footer a {
      color: #B0B8C5;
      text-decoration: none;
      transition: 0.2s;
    }
    .footer a:hover {
      color: var(--accent-gold);
    }
    @media (max-width: 768px) {
      h1 { font-size: 2.2rem; }
      .hero h1 { font-size: 2.5rem; }
      .card-grid, .stats-grid, .case-grid { grid-template-columns: 1fr; }
      .process-steps { flex-direction: column; gap: 40px; }
      .process-steps::before { display: none; }
      .footer-grid { grid-template-columns: 1fr; }
      .nav-links { display: none; }
      .menu-icon { display: block; }
    }