/* roulang page: index */
:root {
      --primary-deep: #1B3A5C;
      --accent-coral: #FF6F4C;
      --accent-coral-dark: #E55A3A;
      --bg-white: #FFFFFF;
      --bg-warm: #F4F6F9;
      --text-dark: #1E2A38;
      --text-mid: #5A6B7D;
      --border-light: #E8ECF1;
      --shadow-sm: 0 4px 20px rgba(27, 58, 92, 0.08);
      --shadow-hover: 0 8px 30px rgba(27, 58, 92, 0.12);
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --border-radius-input: 6px;
      --font-body: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-mono: "Inter", "SF Mono", monospace;
      --transition-smooth: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-body);
      color: var(--text-dark);
      background-color: var(--bg-white);
      line-height: 1.8;
      margin: 0;
      overflow-x: hidden;
    }
    h1, h2, h3, h4, .nav-logo, .hero-title, .section-title {
      font-weight: 600;
      color: var(--primary-deep);
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container, .container-lg, .container-fluid {
      padding-left: 24px;
      padding-right: 24px;
    }
    /* 自定义按钮与交互 */
    .btn-coral {
      background-color: var(--accent-coral);
      color: white;
      border: none;
      border-radius: var(--border-radius-btn);
      padding: 14px 36px;
      font-weight: 600;
      font-size: 1rem;
      transition: var(--transition-smooth);
      display: inline-block;
      text-align: center;
    }
    .btn-coral:hover {
      background-color: var(--accent-coral-dark);
      transform: scale(1.03);
      color: white;
    }
    .btn-outline-white {
      border: 1px solid white;
      color: white;
      background: transparent;
      border-radius: var(--border-radius-btn);
      padding: 10px 24px;
    }
    .arrow-link {
      color: var(--accent-coral);
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition-smooth);
    }
    .arrow-link i {
      transition: transform 0.2s;
    }
    .arrow-link:hover {
      color: var(--accent-coral-dark);
    }
    .arrow-link:hover i {
      transform: translateX(4px);
    }
    /* 导航分屏结构 */
    .custom-navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 64px;
      background: white;
      border-bottom: 1px solid var(--border-light);
      z-index: 1030;
      display: flex;
      align-items: center;
      box-shadow: none;
      transition: box-shadow 0.3s;
    }
    .custom-navbar.scrolled {
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    }
    .nav-left {
      width: 45%;
      padding-left: 4vw;
      display: flex;
      align-items: center;
    }
    .nav-logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary-deep);
      letter-spacing: 1px;
    }
    .nav-right {
      width: 55%;
      display: flex;
      justify-content: flex-end;
      padding-right: 4vw;
    }
    .desktop-nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .desktop-nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-mid);
      position: relative;
      padding: 4px 0;
    }
    .desktop-nav-links a.active,
    .desktop-nav-links a:hover {
      color: var(--primary-deep);
    }
    .desktop-nav-links a.active::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -2px;
      width: 100%;
      height: 2px;
      background: var(--accent-coral);
    }
    .mobile-menu-toggle {
      background: none;
      border: none;
      font-size: 28px;
      color: var(--primary-deep);
      display: none;
    }
    /* Hero 分屏 */
    .hero-split {
      display: flex;
      min-height: 100vh;
      padding-top: 64px;
    }
    .hero-left {
      width: 45%;
      background: var(--bg-white);
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 0 4vw;
    }
    .hero-left .nav-logo-large {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--primary-deep);
      margin-bottom: 48px;
    }
    .vertical-anchors {
      display: flex;
      flex-direction: column;
      gap: 24px;
      margin-bottom: 60px;
    }
    .vertical-anchors a {
      font-size: 1.1rem;
      font-weight: 500;
      color: var(--text-mid);
      padding-left: 16px;
      border-left: 3px solid transparent;
      transition: var(--transition-smooth);
    }
    .vertical-anchors a.active,
    .vertical-anchors a:hover {
      color: var(--primary-deep);
      border-left-color: var(--accent-coral);
    }
    .trust-badges {
      display: flex;
      gap: 20px;
      opacity: 0.7;
      margin-top: auto;
    }
    .hero-right {
      width: 55%;
      background: linear-gradient(135deg, rgba(27,58,92,0.05) 0%, rgba(255,111,76,0.08) 100%), url('/assets/images/backpic/hero-bg.jpg') center/cover no-repeat;
      display: flex;
      align-items: center;
      padding: 0 4vw;
      position: relative;
    }
    .hero-content {
      max-width: 540px;
      color: white;
      text-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }
    .hero-title {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.2;
      color: white;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 1.25rem;
      margin-bottom: 32px;
      opacity: 0.95;
    }
    /* 数据看板 */
    .stats-panel {
      background-color: var(--bg-warm);
      padding: 80px 0;
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 3.5rem;
      font-weight: 700;
      color: var(--primary-deep);
    }
    .stat-label {
      color: var(--text-mid);
      font-size: 1rem;
      margin-top: 8px;
    }
    /* 服务矩阵非对称 */
    .service-asymmetric .section-intro {
      padding-right: 40px;
    }
    .service-card {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: var(--border-radius-card);
      padding: 32px;
      transition: var(--transition-smooth);
      box-shadow: var(--shadow-sm);
      height: 100%;
      border-top: 4px solid var(--accent-coral);
    }
    .service-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: var(--accent-coral);
    }
    .service-icon {
      width: 48px;
      height: 48px;
      background: rgba(27,58,92,0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-deep);
      font-size: 24px;
      margin-bottom: 20px;
    }
    /* 对比布局 */
    .compare-col {
      background: white;
      border-radius: var(--border-radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .compare-highlight {
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent-coral);
    }
    .divider-vertical {
      width: 2px;
      background: var(--border-light);
      margin: 0 20px;
    }
    /* FAQ */
    .accordion-custom .accordion-button {
      background: var(--bg-warm);
      color: var(--primary-deep);
      font-weight: 600;
      font-size: 1.125rem;
      padding: 20px;
      border: none;
      box-shadow: none;
      border-radius: 8px !important;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      background: rgba(27,58,92,0.05);
      color: var(--primary-deep);
    }
    .accordion-custom .accordion-body {
      padding: 20px 32px;
      color: var(--text-mid);
      border-left: 3px solid var(--primary-deep);
      margin-left: 8px;
    }
    /* CTA表单 */
    .cta-section {
      background: linear-gradient(135deg, #1B3A5C 0%, #0F2A40 100%);
      border-radius: 24px;
      padding: 60px;
      color: white;
    }
    .form-control-custom {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: var(--border-radius-input);
      padding: 12px 16px;
    }
    .form-control-custom:focus {
      border-color: var(--primary-deep);
      box-shadow: 0 0 0 3px rgba(27,58,92,0.1);
    }
    /* 页脚 */
    .footer-dark {
      background: #15263B;
      color: #B0C4D8;
      padding: 60px 0 30px;
    }
    .footer-dark h5 {
      color: white;
      font-weight: 600;
    }
    .footer-dark a {
      color: #B0C4D8;
    }
    .footer-dark a:hover {
      color: var(--accent-coral);
    }
    .qr-placeholder {
      width: 100px;
      height: 100px;
      background: #2C3E50;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 14px;
    }
    @media (max-width: 768px) {
      .hero-split {
        flex-direction: column;
      }
      .hero-left, .hero-right {
        width: 100%;
        padding: 32px 24px;
      }
      .hero-left {
        min-height: auto;
      }
      .hero-right {
        min-height: 70vh;
      }
      .desktop-nav-links {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-left {
        width: auto;
      }
      .service-asymmetric .row {
        flex-direction: column;
      }
      .divider-vertical {
        display: none;
      }
      .compare-row {
        flex-direction: column;
      }
      .cta-section {
        padding: 40px 24px;
      }
      .stat-number {
        font-size: 2.5rem;
      }
      .hero-title {
        font-size: 2.2rem;
      }
    }