/* roulang page: index */
:root {
      --primary-deep: #1A1C20;
      --accent-orange: #F05423;
      --accent-cyan: #00B4D8;
      --bg-frost: #F8F9FA;
      --bg-ice: #E9ECEF;
      --text-body: #495057;
      --text-muted: #6C757D;
      --border-light: rgba(0,0,0,0.05);
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.08);
      --radius-md: 8px;
      --radius-pill: 50px;
      --transition: all 0.25s ease;
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-stack);
      background-color: var(--bg-frost);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    /* 自定义容器微调 */
    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    /* 导航栏 - 磨砂玻璃效果 */
    .navbar-custom {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(248, 249, 250, 0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 1px 10px rgba(0,0,0,0.02);
      border-bottom: 1px solid var(--border-light);
    }
    .brand-logo {
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: -0.3px;
      color: var(--primary-deep);
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .brand-logo i {
      font-size: 2rem;
      color: var(--accent-orange);
    }
    .nav-pill-custom {
      display: flex;
      flex-wrap: nowrap;
      overflow-x: auto;
      gap: 0.5rem;
      padding-bottom: 0.5rem;
      scrollbar-width: thin;
    }
    .nav-pill-custom::-webkit-scrollbar {
      height: 4px;
    }
    .nav-pill-custom::-webkit-scrollbar-thumb {
      background: var(--accent-orange);
      border-radius: 4px;
    }
    .pill-link {
      display: inline-block;
      padding: 0.4rem 1.2rem;
      border-radius: var(--radius-pill);
      background: var(--bg-frost);
      color: var(--primary-deep);
      font-weight: 500;
      font-size: 0.9rem;
      white-space: nowrap;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .pill-link:hover,
    .pill-link.active {
      background: var(--accent-orange);
      color: white;
      border-color: var(--accent-orange);
    }
    .btn-primary-custom {
      background: var(--accent-orange);
      color: white;
      border-radius: var(--radius-pill);
      padding: 0.6rem 1.8rem;
      font-weight: 600;
      letter-spacing: 0.5px;
      border: none;
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
    }
    .btn-primary-custom:hover {
      background: #D9481F;
      transform: translateY(-2px);
      color: white;
      box-shadow: 0 8px 18px rgba(240,84,35,0.25);
    }
    .btn-outline-cyan {
      background: transparent;
      color: var(--accent-cyan);
      border: 1px solid var(--accent-cyan);
      border-radius: var(--radius-pill);
      padding: 0.6rem 1.8rem;
      font-weight: 600;
      transition: var(--transition);
    }
    .btn-outline-cyan:hover {
      background: var(--accent-cyan);
      color: white;
      transform: translateY(-2px);
    }
    /* Hero */
    .hero-section {
      padding: 4rem 0 5rem;
      background-color: var(--bg-frost);
      position: relative;
      overflow: hidden;
    }
    .hero-decoration {
      position: absolute;
      right: -5%;
      top: -10%;
      width: 450px;
      height: 450px;
      background: radial-gradient(circle, rgba(240,84,35,0.08) 0%, transparent 70%);
      border-radius: 50%;
      z-index: 0;
    }
    .hero-title {
      font-weight: 700;
      font-size: 3.5rem;
      color: var(--primary-deep);
      letter-spacing: -0.5px;
      line-height: 1.2;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin: 1.5rem 0 2rem;
    }
    /* 板块通用 */
    .section-padding {
      padding: 5rem 0;
    }
    .section-title {
      font-weight: 600;
      font-size: 2.5rem;
      color: var(--primary-deep);
      margin-bottom: 1rem;
    }
    .section-desc {
      color: var(--text-muted);
      margin-bottom: 3rem;
      font-size: 1.1rem;
    }
    /* 卡片样式 */
    .service-card-custom {
      background: var(--bg-ice);
      border-radius: var(--radius-md);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border: 1px solid transparent;
      height: 100%;
    }
    .service-card-custom:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-5px);
      border-color: rgba(0,180,216,0.2);
    }
    .icon-circle {
      width: 50px;
      height: 50px;
      background: rgba(0,180,216,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-cyan);
      font-size: 1.5rem;
      margin-bottom: 1.5rem;
      transition: var(--transition);
    }
    .service-card-custom:hover .icon-circle {
      background: var(--accent-orange);
      color: white;
    }
    /* 深色数据面板 */
    .dark-panel {
      background: var(--primary-deep);
      border-radius: var(--radius-md);
      padding: 3rem 2rem;
    }
    .stat-number {
      font-weight: 700;
      font-size: 2.8rem;
      color: var(--accent-orange);
      line-height: 1.1;
    }
    .stat-label {
      color: rgba(255,255,255,0.8);
      font-size: 1rem;
    }
    .glass-card {
      background: rgba(255,255,255,0.06);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-md);
      padding: 1.8rem 1.5rem;
      border: 1px solid rgba(255,255,255,0.08);
    }
    /* 案例卡片 */
    .case-card {
      background: white;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border-bottom: 4px solid var(--accent-orange);
    }
    .case-card:hover {
      box-shadow: var(--shadow-hover);
    }
    .case-img-wrap {
      position: relative;
      overflow: hidden;
    }
    .case-img-wrap img {
      transition: transform 0.4s ease;
      width: 100%;
      height: 220px;
      object-fit: cover;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }
    .overlay-cyan {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0,180,216,0.35);
      opacity: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
      color: white;
      font-weight: 600;
      font-size: 1.2rem;
    }
    .case-card:hover .overlay-cyan {
      opacity: 1;
    }
    /* 步骤时间轴 */
    .step-item {
      display: flex;
      gap: 2rem;
      margin-bottom: 2.5rem;
    }
    .step-number {
      font-weight: 700;
      font-size: 4rem;
      color: rgba(240,84,35,0.15);
      line-height: 1;
      min-width: 80px;
    }
    .step-content {
      border-left: 2px dashed var(--accent-cyan);
      padding-left: 2rem;
    }
    /* FAQ 手风琴重塑 */
    .accordion-custom .accordion-item {
      background: transparent;
      border: none;
      margin-bottom: 1rem;
    }
    .accordion-custom .accordion-header {
      background: var(--bg-ice);
      border-radius: var(--radius-md);
    }
    .accordion-custom .accordion-button {
      background: var(--bg-ice);
      font-weight: 600;
      color: var(--primary-deep);
      box-shadow: none;
      border-radius: var(--radius-md) !important;
      padding: 1.2rem 1.8rem;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      background: var(--primary-deep);
      color: white;
      border-left: 4px solid var(--accent-orange);
      border-radius: var(--radius-md) var(--radius-md) 0 0;
    }
    .accordion-custom .accordion-body {
      background: white;
      border-radius: 0 0 var(--radius-md) var(--radius-md);
      padding: 1.8rem;
      color: var(--text-body);
    }
    /* 联系表单 */
    .form-control-custom {
      background: transparent;
      border: none;
      border-bottom: 1px solid rgba(255,255,255,0.3);
      border-radius: 0;
      padding: 0.8rem 0.2rem;
      color: white;
      transition: var(--transition);
    }
    .form-control-custom:focus {
      border-bottom-color: var(--accent-orange);
      box-shadow: none;
      background: transparent;
      color: white;
    }
    .form-control-custom::placeholder {
      color: rgba(255,255,255,0.6);
    }
    .footer-custom {
      background: #212529;
      color: #ADB5BD;
      padding: 3rem 0 1.5rem;
    }
    .footer-brand {
      font-weight: 700;
      font-size: 1.8rem;
      color: white;
    }
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.8rem;
      }
      .section-title {
        font-size: 2rem;
      }
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .stat-number {
        font-size: 2.2rem;
      }
    }