/* roulang page: index */
:root {
      --primary: #1E3A5F;
      --primary-hover: #152B45;
      --accent: #C8B273;
      --bg: #F7F9FC;
      --card-bg: #FFFFFF;
      --text: #2C3E50;
      --text-light: #5D6D7E;
      --border: #E5E9F0;
      --border-light: #D0D7E2;
      --radius: 12px;
      --radius-sm: 8px;
      --shadow: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.08);
      --transition: 0.25s ease;
      --font-title: "PingFang SC", "Microsoft YaHei", sans-serif;
      --font-body: "PingFang SC", "Microsoft YaHei", sans-serif;
      --font-number: "Inter", "Segoe UI", sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      margin: 0;
      font-size: 15px;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-title);
      font-weight: 600;
      letter-spacing: 0.5px;
    }
    a {
      color: var(--primary);
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover {
      color: var(--primary-hover);
    }
    .container {
      max-width: 1200px;
      padding-left: 24px;
      padding-right: 24px;
    }
    /* 导航样式 */
    .navbar-custom {
      background: transparent;
      padding: 0;
      height: 56px;
      display: flex;
      align-items: center;
      z-index: 100;
    }
    .navbar-brand-custom {
      font-family: var(--font-title);
      font-weight: 600;
      font-size: 1.2rem;
      color: var(--primary) !important;
      letter-spacing: 1px;
    }
    .nav-link-custom {
      color: var(--text-light) !important;
      font-size: 0.9rem;
      font-weight: 500;
      padding: 0 12px !important;
      transition: var(--transition);
    }
    .nav-link-custom:hover, .nav-link-custom.active {
      color: var(--primary) !important;
    }
    .search-icon {
      color: var(--text-light);
      font-size: 1rem;
      margin-left: 8px;
      cursor: pointer;
      transition: var(--transition);
    }
    .search-icon:hover {
      color: var(--primary);
    }
    /* Hero 分屏 */
    .hero-container {
      display: flex;
      height: 100vh;
      min-height: 600px;
    }
    .hero-visual {
      width: 45%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .hero-visual::after {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(30,58,95,0.1);
    }
    .hero-graphic {
      position: relative;
      z-index: 2;
      width: 140px;
      height: 140px;
      border: 2px solid var(--accent);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(255,255,255,0.15);
      backdrop-filter: blur(4px);
    }
    .hero-graphic i {
      font-size: 3.5rem;
      color: var(--accent);
    }
    .hero-content {
      width: 55%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 0 48px;
      position: relative;
    }
    .hero-nav-wrapper {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      padding: 0 48px;
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.3;
      margin-bottom: 1.2rem;
    }
    .hero-sub {
      font-size: 1.1rem;
      color: var(--text-light);
      margin-bottom: 2rem;
      max-width: 480px;
    }
    .btn-primary-custom {
      background: var(--primary);
      border: none;
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 1rem;
      transition: var(--transition);
      margin-right: 12px;
    }
    .btn-primary-custom:hover {
      background: var(--primary-hover);
      color: white;
      transform: translateY(-2px);
    }
    .btn-outline-custom {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 1rem;
      transition: var(--transition);
    }
    .btn-outline-custom:hover {
      background: rgba(30,58,95,0.04);
      color: var(--primary);
    }
    /* 通用区块 */
    section {
      padding: 90px 0;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.5rem;
      text-align: center;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-light);
      margin-bottom: 3rem;
      text-align: center;
    }
    /* 卡片 */
    .card-custom {
      background: var(--card-bg);
      border: none;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 28px;
      transition: var(--transition);
      height: 100%;
    }
    .card-custom:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .icon-circle {
      width: 56px;
      height: 56px;
      background: #F0F4FA;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
      font-size: 1.8rem;
    }
    /* 服务区块 */
    .service-row {
      display: flex;
      align-items: center;
      gap: 48px;
      margin-bottom: 60px;
    }
    .service-img {
      width: 45%;
      border-radius: 16px;
      box-shadow: var(--shadow);
      object-fit: cover;
    }
    /* 瀑布流 */
    .masonry {
      column-count: 3;
      column-gap: 20px;
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 20px;
      background: white;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      transition: var(--transition);
    }
    .masonry-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .masonry-item img {
      width: 100%;
      display: block;
      border-radius: 12px 12px 0 0;
    }
    .masonry-text {
      padding: 16px 20px;
    }
    /* 对比表 */
    .comparison-card {
      background: white;
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow);
      transition: var(--transition);
      position: relative;
      border: 1px solid var(--border);
      height: 100%;
    }
    .comparison-card.recommended {
      border: 2px solid var(--primary);
      transform: scale(1.03);
      box-shadow: var(--shadow-hover);
    }
    .badge-accent {
      background: var(--accent);
      color: white;
      font-weight: 600;
      font-size: 0.8rem;
      padding: 4px 12px;
      border-radius: 20px;
      position: absolute;
      top: -12px;
      right: 20px;
    }
    /* 数字区块 */
    .trust-number {
      font-family: var(--font-number);
      font-size: 2.6rem;
      font-weight: 700;
      color: var(--primary);
    }
    .divider-line {
      width: 1px;
      height: 40px;
      background: var(--border);
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background: #F7F9FC;
      color: var(--primary);
      font-weight: 600;
      box-shadow: none;
      border-left: 3px solid var(--accent);
    }
    .accordion-button {
      font-weight: 600;
      font-size: 1rem;
      color: var(--text);
    }
    /* 表单 */
    .form-control-custom {
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      background: #FAFBFC;
      padding: 12px 16px;
      transition: var(--transition);
    }
    .form-control-custom:focus {
      border-color: var(--primary);
      box-shadow: none;
    }
    /* 页脚 */
    footer {
      background: var(--primary);
      color: #B0C4DE;
      padding: 60px 0 30px;
    }
    footer a {
      color: #B0C4DE;
    }
    footer a:hover {
      color: var(--accent);
    }
    @media (max-width: 768px) {
      .hero-container {
        flex-direction: column;
        height: auto;
      }
      .hero-visual {
        width: 100%;
        height: 40vh;
      }
      .hero-content {
        width: 100%;
        padding: 32px 24px;
        height: auto;
      }
      .hero-nav-wrapper {
        position: relative;
        padding: 12px 24px;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .masonry {
        column-count: 1;
      }
      .service-row {
        flex-direction: column;
      }
      .service-img {
        width: 100%;
      }
      .comparison-card.recommended {
        transform: none;
      }
    }