/* roulang page: index */
/* ----- 自定义设计变量与系统覆盖 ----- */
    :root {
      --primary-orange: #F15A24;
      --primary-orange-hover: #E04A1A;
      --deep-navy: #1B2A3B;
      --navy-dark: #243447;
      --bg-light: #F7F8FA;
      --card-white: #FFFFFF;
      --text-weak: #6B7280;
      --text-strong: #111827;
      --text-body: #4B5563;
      --border-light: #E5E7EB;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.1);
      --radius-md: 12px;
      --radius-btn: 8px;
      --transition-smooth: all 0.3s ease;
      --font-main: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    }
    
    * {
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
    }
    
    body {
      font-family: var(--font-main);
      background-color: var(--bg-light);
      margin: 0;
      padding: 0;
      color: var(--text-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    
    /* 布局容器 */
    .container-custom {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    @media (max-width: 768px) {
      .container-custom {
        padding-left: 16px;
        padding-right: 16px;
      }
    }
    
    /* 背景图处理 */
    .hero-bg-gradient {
      background: linear-gradient(135deg, #1B2A3B 0%, #243447 70%);
      position: relative;
      overflow: hidden;
    }
    .hero-bg-gradient::before {
      content: "";
      position: absolute;
      top: -15%;
      right: -10%;
      width: 60%;
      height: 130%;
      background: radial-gradient(circle, rgba(241,90,36,0.25) 0%, transparent 70%);
      transform: rotate(12deg);
      pointer-events: none;
    }
    .hero-bg-image {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.18;
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: 0;
    }
    
    /* 卡片与交互 */
    .card-modern {
      background: var(--card-white);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
    }
    .card-modern:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    
    .btn-primary {
      background-color: var(--primary-orange);
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition-smooth);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      letter-spacing: 0.5px;
    }
    .btn-primary:hover {
      background-color: var(--primary-orange-hover);
      transform: scale(1.03);
      box-shadow: 0 10px 18px rgba(241,90,36,0.35);
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-orange);
      color: var(--primary-orange);
      padding: 10px 26px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition-smooth);
      cursor: pointer;
    }
    .btn-outline:hover {
      background: rgba(241,90,36,0.08);
      transform: scale(1.02);
    }
    
    /* 导航奸细化 */
    .nav-blur {
      background: rgba(27, 42, 59, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    
    /* 数字动画样式 */
    .counter-value {
      font-size: 48px;
      font-weight: 700;
      color: var(--primary-orange);
      line-height: 1.2;
    }
    
    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      cursor: pointer;
      padding: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      transition: background 0.2s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease-out;
    }
    .faq-icon {
      transition: transform 0.3s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-item.active .faq-answer {
      max-height: 160px;
    }
    
    /* 统计卡片动效 */
    .stat-card {
      transition: transform 0.2s ease;
    }
    .stat-card:hover .counter-value {
      animation: pulse 0.4s ease;
    }
    @keyframes pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }