/* roulang page: index */
:root {
      --deep-aubergine: #2D1B3D;
      --dark-aubergine: #1F1229;
      --champagne-gold: #D4AF37;
      --soft-white: #FAF8F5;
      --pure-white: #FFFFFF;
      --border-light: #E0DCD5;
      --text-dark: #2D1B3D;
      --text-muted: rgba(45,27,61,0.7);
      --shadow-sm: 0 4px 20px rgba(45,27,61,0.06);
      --shadow-md: 0 8px 30px rgba(45,27,61,0.12);
      --radius-card: 16px;
      --radius-btn: 12px;
      --radius-tag: 8px;
      --transition: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--soft-white);
      color: var(--text-dark);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .header-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      background: rgba(45,27,61,0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      padding: 16px 0;
      transition: background 0.3s ease;
      border-bottom: 1px solid rgba(212,175,55,0.15);
    }
    .nav-grid {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--pure-white);
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: 1px;
    }
    .logo-icon {
      font-size: 2rem;
      color: var(--champagne-gold);
    }
    .search-box {
      display: flex;
      align-items: center;
      background: rgba(255,255,255,0.15);
      border-radius: 30px;
      padding: 8px 18px;
      flex: 1;
      max-width: 400px;
      min-width: 200px;
      border: 1px solid transparent;
      transition: var(--transition);
    }
    .search-box i {
      color: var(--champagne-gold);
      font-size: 1rem;
      margin-right: 8px;
    }
    .search-box input {
      background: transparent;
      border: none;
      outline: none;
      color: white;
      width: 100%;
      font-size: 0.95rem;
    }
    .search-box input::placeholder {
      color: rgba(255,255,255,0.7);
      font-weight: 300;
    }
    .search-box:focus-within {
      border-color: var(--champagne-gold);
      background: rgba(255,255,255,0.25);
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      color: rgba(255,255,255,0.9);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding-bottom: 4px;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--champagne-gold);
      transition: width 0.25s ease;
    }
    .nav-links a:hover {
      color: var(--champagne-gold);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: white;
      cursor: pointer;
    }
    /* Hero */
    .hero {
      background: linear-gradient(135deg, #2D1B3D 0%, #1F1229 100%);
      padding: 160px 0 100px;
      position: relative;
      overflow: hidden;
    }
    .hero-bg-img {
      position: absolute;
      right: 0;
      top: 0;
      width: 50%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.25;
      mask-image: linear-gradient(to left, rgba(0,0,0,0.4), transparent);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 600px;
    }
    .hero h1 {
      font-size: 2.8rem;
      font-weight: 700;
      color: white;
      letter-spacing: -0.5px;
      margin-bottom: 1.2rem;
      line-height: 1.3;
    }
    .hero p {
      font-size: 1.1rem;
      color: rgba(212,175,55,0.9);
      margin-bottom: 2rem;
      max-width: 480px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--champagne-gold);
      color: #1F1229;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      background: #c5a029;
      color: white;
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--champagne-gold);
      color: var(--champagne-gold);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      transition: var(--transition);
      display: inline-block;
      text-align: center;
    }
    .btn-outline:hover {
      background: var(--champagne-gold);
      color: #1F1229;
    }
    /* 通用板块 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--deep-aubergine);
    }
    .section-sub {
      color: var(--text-muted);
      margin-bottom: 48px;
      font-size: 1.1rem;
    }
    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--pure-white);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      text-align: left;
      border-bottom: 3px solid transparent;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-bottom-color: var(--champagne-gold);
    }
    .service-icon {
      font-size: 2.5rem;
      color: var(--champagne-gold);
      margin-bottom: 20px;
    }
    .service-card h3 {
      font-size: 1.4rem;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .service-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }
    /* 数据条 */
    .stats-band {
      background: var(--deep-aubergine);
      padding: 60px 0;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      text-align: center;
      gap: 24px;
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--champagne-gold);
      margin-bottom: 8px;
    }
    .stat-label {
      color: rgba(255,255,255,0.85);
      font-size: 0.95rem;
    }
    /* 案例 */
    .case-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      margin-bottom: 60px;
    }
    .case-img {
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .case-text h3 {
      font-size: 1.6rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .case-tag {
      display: inline-block;
      border: 1px solid var(--champagne-gold);
      color: var(--champagne-gold);
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.8rem;
      margin-top: 12px;
    }
    /* 方案 */
    .solution-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .solution-list {
      list-style: none;
      padding: 0;
    }
    .solution-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 20px;
      font-size: 1rem;
    }
    .solution-list i {
      color: var(--champagne-gold);
      font-size: 1.2rem;
    }
    /* FAQ */
    .accordion-item {
      background: var(--pure-white);
      border-radius: 12px;
      margin-bottom: 12px;
      box-shadow: var(--shadow-sm);
    }
    .accordion-title {
      background: transparent;
      font-weight: 600;
      font-size: 1.1rem;
      padding: 18px 24px;
      border-left: 4px solid var(--champagne-gold);
      cursor: pointer;
    }
    .accordion-content {
      padding: 0 24px 20px;
      color: var(--text-muted);
    }
    /* 联系 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
    }
    .contact-form input, .contact-form textarea {
      border-radius: 12px;
      border: 1px solid var(--border-light);
      padding: 14px;
      margin-bottom: 16px;
      background: white;
    }
    .contact-form input:focus, .contact-form textarea:focus {
      border-color: var(--champagne-gold);
      outline: none;
    }
    .footer {
      background: var(--deep-aubergine);
      color: rgba(255,255,255,0.8);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
    }
    .footer a {
      color: var(--champagne-gold);
    }
    .copyright {
      border-top: 1px solid rgba(255,255,255,0.15);
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      font-size: 0.9rem;
    }
    @media (max-width: 1024px) {
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .hamburger { display: block; }
      .nav-links { display: none; flex-direction: column; width: 100%; background: rgba(45,27,61,0.95); padding: 20px; border-radius: 16px; }
      .nav-links.active { display: flex; }
      .search-box { max-width: 100%; order: -1; }
      .hero h1 { font-size: 2rem; }
      .services-grid, .stats-grid, .case-row, .solution-grid, .contact-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      section { padding: 60px 0; }
    }