/* roulang page: index */
:root {
      --bs-primary: #1A5F7A;
      --bs-primary-rgb: 26, 95, 122;
      --bs-secondary: #C8963E;
      --bs-body-color: #2D3748;
      --bs-body-bg: #F7F9FC;
      --bs-border-radius: 12px;
      --bs-btn-padding-x: 28px;
      --bs-btn-padding-y: 12px;
      --bs-card-border-radius: 12px;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 30px rgba(26,95,122,0.10);
      --color-bg-light: #F7F9FC;
      --color-white: #FFFFFF;
      --color-text: #2D3748;
      --color-text-light: #718096;
      --color-border: #E2E8F0;
      --color-success: #2F855A;
      --color-accent: #C8963E;
      --color-dark-footer: #1A202C;
      --font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans CJK SC", sans-serif;
      --transition-base: 0.3s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-family);
      background-color: var(--bs-body-bg);
      color: var(--color-text);
      line-height: 1.7;
      margin: 0;
      padding-top: 72px;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 导航 */
    .navbar-custom {
      background: #fff;
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      border-bottom: 1px solid var(--color-border);
      height: 72px;
      padding: 0 20px;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1030;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .logo-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 700;
      color: #1A5F7A;
      letter-spacing: -0.02em;
    }
    .logo-icon {
      width: 32px;
      height: 32px;
      background: #C8963E;
      clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    }

    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-links a {
      color: #4A5568;
      font-weight: 500;
      padding: 8px 0;
      position: relative;
      transition: color var(--transition-base);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: #1A5F7A;
      transition: width var(--transition-base);
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: #1A5F7A;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .search-box {
      display: flex;
      align-items: center;
      background: #f1f5f9;
      border-radius: 30px;
      padding: 6px 16px;
      margin-right: 12px;
    }
    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      font-size: 14px;
      width: 120px;
    }

    .btn-brand {
      background: #1A5F7A;
      color: white;
      border-radius: 8px;
      padding: 10px 24px;
      font-weight: 600;
      border: none;
      transition: background var(--transition-base);
    }
    .btn-brand:hover {
      background: #154E64;
      color: white;
    }
    .btn-outline-brand {
      border: 2px solid #1A5F7A;
      color: #1A5F7A;
      background: transparent;
      border-radius: 8px;
      padding: 10px 24px;
      font-weight: 600;
      transition: all var(--transition-base);
    }
    .btn-outline-brand:hover {
      background: rgba(26,95,122,0.05);
    }
    .btn-accent {
      background: #C8963E;
      color: white;
      border-radius: 8px;
      font-weight: 600;
      border: none;
      padding: 12px 28px;
    }
    .btn-accent:hover {
      background: #b07d2e;
    }

    /* 汉堡菜单 */
    .navbar-toggler {
      border: none;
      font-size: 24px;
      color: #1A5F7A;
      background: transparent;
    }

    @media (min-width: 992px) {
      .mobile-menu {
        display: none;
      }
    }
    @media (max-width: 991.98px) {
      .nav-links, .search-box, .d-none-mobile {
        display: none;
      }
      .navbar-custom {
        justify-content: space-between;
      }
    }

    /* 区块间距 */
    section {
      padding: 80px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }

    h1 {
      font-size: 44px;
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.2;
    }
    h2 {
      font-size: 34px;
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    h3 {
      font-size: 22px;
      font-weight: 600;
    }

    .card-custom {
      background: #fff;
      border-radius: 12px;
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      transition: all var(--transition-base);
      border: none;
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .icon-circle {
      width: 56px;
      height: 56px;
      background: rgba(200,150,62,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: #C8963E;
      font-size: 24px;
    }

    .bg-soft-primary {
      background: rgba(26,95,122,0.08);
    }

    .faq-item {
      background: #fff;
      border-radius: 12px;
      margin-bottom: 16px;
      padding: 20px 24px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }
    .faq-question {
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
    }
    .faq-answer {
      margin-top: 12px;
      color: #4A5568;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    .pricing-card {
      background: #fff;
      border-radius: 16px;
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: all var(--transition-base);
    }
    .pricing-card.featured {
      background: #1A5F7A;
      color: white;
      transform: scale(1.02);
      box-shadow: 0 10px 30px rgba(26,95,122,0.2);
    }
    .pricing-card.featured .btn-outline-brand {
      background: #C8963E;
      border-color: #C8963E;
      color: white;
    }

    footer {
      background: #1A202C;
      color: #CBD5E0;
      padding: 60px 0 30px;
    }
    footer a {
      color: #CBD5E0;
      transition: color 0.2s;
    }
    footer a:hover {
      color: #C8963E;
    }

    .bg-hero-img {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 16px;
      min-height: 380px;
      box-shadow: 0 8px 24px rgba(0,0,0,0.08);
      position: relative;
      overflow: hidden;
    }
    .bg-hero-img::after {
      content: '';
      position: absolute;
      bottom: 0;
      right: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, transparent 50%, rgba(26,95,122,0.08) 100%);
    }

    @media (max-width: 768px) {
      h1 { font-size: 34px; }
      h2 { font-size: 28px; }
      .btn-brand, .btn-outline-brand { width: 100%; text-align: center; }
    }