/* roulang page: index */
:root {
      --primary: #E12B1C;
      --primary-dark: #C41E12;
      --secondary: #1A1A2E;
      --accent: #F5A623;
      --bg-light: #F8F9FA;
      --text-dark: #1E1E24;
      --text-muted: #6B7280;
      --white: #FFFFFF;
      --card-shadow: 0 4px 12px rgba(0,0,0,0.06);
      --card-hover-shadow: 0 8px 24px rgba(225,43,28,0.12);
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
      --transition: 0.2s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-family);
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.7;
      font-weight: 400;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1140px;
      padding-left: 16px;
      padding-right: 16px;
    }
    /* 导航 */
    .navbar-custom {
      background: rgba(26, 26, 46, 0.75);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 0.75rem 0;
      transition: background 0.3s ease;
    }
    .navbar-custom.scrolled {
      background: #1A1A2E;
      box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 1.6rem;
      letter-spacing: 1px;
      color: #fff !important;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .navbar-brand i {
      color: var(--primary);
      font-size: 1.8rem;
    }
    .nav-link {
      color: rgba(255,255,255,0.8) !important;
      font-weight: 500;
      margin: 0 0.3rem;
      padding: 0.5rem 0.9rem !important;
      border-radius: 6px;
      transition: var(--transition);
    }
    .nav-link:hover, .nav-link.active {
      color: #fff !important;
      background: rgba(225,43,28,0.2);
    }
    .nav-cta {
      background: var(--primary);
      color: #fff !important;
      border-radius: 30px;
      padding: 0.5rem 1.5rem !important;
      font-weight: 600;
      margin-left: 0.5rem;
    }
    .nav-cta:hover {
      background: var(--primary-dark);
    }
    .live-badge {
      background: var(--accent);
      color: #1A1A2E;
      font-size: 0.7rem;
      font-weight: 700;
      padding: 0.2rem 0.7rem;
      border-radius: 20px;
      margin-left: 0.5rem;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .navbar-toggler {
      border: none;
      color: #fff;
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }
    /* Hero双栏 */
    .hero-section {
      background: radial-gradient(circle at 30% 40%, #1E1E2F, #0B0B15);
      padding: 6rem 0 5rem;
      position: relative;
      overflow: hidden;
    }
    .hero-title {
      font-size: 2.6rem;
      font-weight: 700;
      background: linear-gradient(135deg, #E12B1C 0%, #F5A623 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.3;
    }
    .hero-sub {
      font-size: 1.15rem;
      color: #B0B3C1;
      margin: 1.2rem 0 1.8rem;
    }
    .badge-capsule {
      background: rgba(245,166,35,0.15);
      border: 1px solid var(--accent);
      color: var(--accent);
      padding: 0.3rem 1rem;
      border-radius: 30px;
      font-size: 0.8rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-right: 0.5rem;
      margin-bottom: 0.5rem;
    }
    .btn-primary-custom {
      background: var(--primary);
      border: none;
      color: #fff;
      font-weight: 600;
      padding: 0.7rem 2rem;
      border-radius: var(--border-radius-btn);
      transition: var(--transition);
    }
    .btn-primary-custom:hover {
      background: var(--primary-dark);
      color: #fff;
    }
    .btn-outline-custom {
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 0.7rem 2rem;
      border-radius: var(--border-radius-btn);
      background: transparent;
      transition: var(--transition);
    }
    .btn-outline-custom:hover {
      background: var(--primary);
      color: #fff;
    }
    .hero-image-bg {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: 24px;
      min-height: 320px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
      border: 1px solid rgba(255,255,255,0.1);
    }
    /* 亮点网格 */
    .highlight-card {
      background: #fff;
      border-radius: var(--border-radius-card);
      padding: 1.8rem 1.5rem;
      box-shadow: var(--card-shadow);
      border-bottom: 4px solid var(--primary);
      transition: var(--transition);
    }
    .highlight-card i {
      color: var(--primary);
      font-size: 2rem;
      margin-bottom: 1rem;
    }
    .highlight-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
    }
    /* 案例卡片 */
    .case-card {
      background: #fff;
      border-radius: var(--border-radius-card);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
    }
    .case-img {
      height: 180px;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .case-card:hover .case-img {
      transform: scale(1.04);
    }
    .tag-outline {
      border: 1px solid var(--accent);
      color: var(--accent);
      padding: 0.2rem 0.8rem;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 600;
    }
    /* 对比表 */
    .compare-table th {
      background: #1A1A2E;
      color: white;
      font-weight: 600;
    }
    .compare-highlight {
      color: #10B981;
      font-weight: 700;
      margin-left: 6px;
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background: #fff;
      color: var(--primary);
      font-weight: 700;
      box-shadow: none;
    }
    .accordion-button:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 0.2rem rgba(225,43,28,0.2);
    }
    /* 联系CTA */
    .contact-cta {
      background: var(--secondary);
      border-radius: 28px;
      padding: 3rem 2.5rem;
    }
    .form-control {
      border-radius: 8px;
      border: 1px solid #ddd;
      padding: 0.7rem 1rem;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 0.2rem rgba(225,43,28,0.15);
    }
    .btn-accent {
      background: var(--accent);
      color: #1A1A2E;
      font-weight: 700;
      border: none;
      border-radius: 8px;
      padding: 0.7rem 2rem;
    }
    .btn-accent:hover {
      background: #e6990f;
      color: #000;
    }
    footer {
      background: #0E0E1A;
      color: #A0A5B5;
    }
    footer a:hover {
      color: var(--primary) !important;
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 2rem;
      }
      .hero-image-bg {
        min-height: 240px;
        margin-top: 2rem;
      }
      .contact-cta {
        padding: 2rem 1.2rem;
      }
    }