/* roulang page: index */
:root {
      --primary: #1A5F4A;
      --primary-dark: #154D3C;
      --accent: #E8A838;
      --bg-warm: #F7F5F0;
      --bg-dark: #1E3B34;
      --card-bg: #FFFFFF;
      --card-border: #E6E2DA;
      --text-heading: #1A1A1A;
      --text-body: #3D3D3D;
      --text-muted: #6B6B6B;
      --text-on-dark: #FFFFFF;
      --border-light: #D1CCC3;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 6px 16px rgba(0,0,0,0.03);
      --shadow-hover: 0 4px 12px rgba(0,0,0,0.06), 0 12px 28px rgba(0,0,0,0.04);
      --radius-md: 12px;
      --radius-btn: 8px;
      --radius-input: 8px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      --transition: 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.75;
      margin: 0;
      padding: 0;
      font-size: 16px;
    }

    h1, h2, h3, h4 {
      color: var(--text-heading);
      letter-spacing: 0.02em;
    }

    h1 {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.3;
    }

    h2 {
      font-size: 32px;
      font-weight: 600;
      line-height: 1.4;
      margin-bottom: 16px;
    }

    h3 {
      font-size: 20px;
      font-weight: 600;
      line-height: 1.5;
    }

    .text-muted-custom {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.6;
    }

    .section-padding {
      padding: 80px 0;
    }

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏 */
    .navbar-custom {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
      z-index: 1000;
      height: 72px;
      display: flex;
      align-items: center;
    }

    .navbar-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo-brand {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary);
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 8px;
      white-space: nowrap;
    }

    .logo-icon {
      display: flex;
      align-items: center;
    }

    .search-wrapper {
      flex: 1;
      max-width: 360px;
      margin: 0 20px;
      position: relative;
    }

    .search-input {
      width: 100%;
      height: 44px;
      border-radius: 22px;
      background: #F2F0EB;
      border: none;
      padding: 0 48px 0 20px;
      font-size: 15px;
      color: var(--text-body);
      transition: var(--transition);
    }

    .search-input:focus {
      outline: none;
      background: white;
      box-shadow: 0 0 0 3px rgba(26, 95, 74, 0.2);
      border: 1px solid var(--primary);
    }

    .search-icon {
      position: absolute;
      right: 16px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      pointer-events: none;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-link-item {
      color: var(--text-body);
      font-size: 15px;
      font-weight: 500;
      text-decoration: none;
      transition: color 0.2s;
    }

    .nav-link-item:hover {
      color: var(--primary);
    }

    .navbar-toggler {
      border: none;
      color: var(--primary);
      font-size: 1.5rem;
      padding: 0.25rem 0.5rem;
    }

    .mobile-search {
      display: none;
    }

    /* Hero */
    .hero-section {
      background: linear-gradient(135deg, #1A5F4A 0%, #1E4D3D 100%);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      padding: 140px 0 100px;
      text-align: center;
      color: white;
      position: relative;
    }

    .hero-content {
      max-width: 800px;
      margin: 0 auto;
    }

    .hero-content h1 {
      color: white;
      margin-bottom: 16px;
    }

    .hero-subtitle {
      font-size: 16px;
      opacity: 0.85;
      margin-bottom: 32px;
    }

    .hero-search {
      max-width: 480px;
      margin: 0 auto 28px;
      position: relative;
    }

    .hero-search-input {
      width: 100%;
      height: 52px;
      border-radius: 26px;
      background: rgba(255,255,255,0.15);
      border: 1px solid rgba(255,255,255,0.25);
      padding: 0 50px 0 24px;
      color: white;
      font-size: 16px;
      backdrop-filter: blur(4px);
    }

    .hero-search-input::placeholder {
      color: rgba(255,255,255,0.6);
    }

    .hero-search-input:focus {
      outline: none;
      background: rgba(255,255,255,0.2);
      border-color: white;
    }

    .btn-primary-custom {
      background: var(--accent);
      color: #1A1A1A;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      border: none;
      transition: var(--transition);
      text-decoration: none;
      display: inline-block;
    }

    .btn-primary-custom:hover {
      background: #d4952b;
      transform: translateY(-1px);
      color: #1A1A1A;
    }

    .btn-outline-light-custom {
      background: transparent;
      border: 2px solid white;
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      transition: var(--transition);
      text-decoration: none;
      display: inline-block;
    }

    .btn-outline-light-custom:hover {
      background: rgba(255,255,255,0.1);
      color: white;
    }

    /* 卡片通用 */
    .card-service, .case-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .card-service:hover, .case-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .service-icon-circle {
      width: 64px;
      height: 64px;
      background: rgba(26, 95, 74, 0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      transition: 0.2s;
    }

    .card-service:hover .service-icon-circle {
      transform: scale(1.05);
      background: rgba(26, 95, 74, 0.12);
    }

    .data-section {
      background-color: var(--bg-dark);
      color: white;
    }

    .data-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.2;
    }

    .data-label {
      font-size: 14px;
      opacity: 0.8;
    }

    .flow-step {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }

    .flow-icon-circle {
      width: 56px;
      height: 56px;
      border: 2px solid var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      margin-bottom: 12px;
    }

    .accordion-custom .accordion-button {
      background: #F7F5F0;
      font-weight: 600;
      color: var(--text-heading);
      border-left: 4px solid var(--primary);
      border-radius: 0 !important;
      box-shadow: none;
    }

    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--primary);
      background: #F7F5F0;
      border-left-color: var(--accent);
    }

    .footer-dark {
      background: #1A1A1A;
      color: #9E9E9E;
    }

    @media (max-width: 992px) {
      .search-wrapper {
        max-width: 240px;
      }
      .service-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      h1 {
        font-size: 32px;
      }
      h2 {
        font-size: 26px;
      }
      .section-padding {
        padding: 56px 0;
      }
      .navbar-container {
        flex-wrap: wrap;
      }
      .search-wrapper {
        display: none;
      }
      .mobile-search {
        display: block;
        width: 100%;
        margin-top: 12px;
      }
      .nav-links {
        gap: 16px;
      }
      .service-grid, .case-grid {
        grid-template-columns: 1fr;
      }
      .data-number {
        font-size: 36px;
      }
      .flow-steps {
        flex-direction: column;
      }
    }