/* roulang page: index */
/* 自定义CSS变量与全局样式 */
    :root {
      --primary-red: #C8102E;
      --deep-red: #A00D25;
      --grass-green: #1B5E20;
      --champion-gold: #D4AF37;
      --tactical-black: #1A1A1A;
      --marble-white: #F5F5F0;
      --text-dark: #1A1A1A;
      --text-body: #333333;
      --text-light: #6B7280;
      --border-light: rgba(0,0,0,0.08);
      --card-shadow: 0 4px 20px rgba(0,0,0,0.06);
      --card-shadow-hover: 0 12px 32px rgba(0,0,0,0.12);
      --border-radius-card: 16px;
      --border-radius-btn: 8px;
      --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      --container-max: 1280px;
      --section-padding: 5rem 1.5rem;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
      margin: 0;
      padding: 0;
      background-color: #fafaf8;
      color: var(--text-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    
    .font-inter {
      font-family: 'Inter', sans-serif;
    }
    
    .container-custom {
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    
    /* 导航栏样式 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      transition: background-color 0.4s ease, box-shadow 0.4s ease;
      background-color: rgba(26, 26, 26, 0.25);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    
    .navbar.scrolled {
      background-color: rgba(26, 26, 26, 0.95);
      box-shadow: 0 4px 20px rgba(0,0,0,0.25);
      border-bottom: 1px solid rgba(200,16,46,0.3);
    }
    
    .nav-link {
      color: white;
      font-weight: 500;
      position: relative;
      padding: 0.5rem 0;
      transition: color 0.3s;
    }
    
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background-color: var(--primary-red);
      transition: width 0.3s ease;
    }
    
    .nav-link:hover {
      color: #f0f0f0;
    }
    
    .nav-link:hover::after {
      width: 100%;
    }
    
    /* 移动菜单 */
    .mobile-menu {
      transition: opacity 0.3s ease, transform 0.3s ease;
      opacity: 0;
      transform: translateY(-10px);
      pointer-events: none;
    }
    
    .mobile-menu.open {
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
    }
    
    /* Hero 区域 */
    .hero-section {
      background-image: linear-gradient(180deg, rgba(26,26,26,0.7) 0%, rgba(26,26,26,0.4) 70%, rgba(26,26,26,0.7) 100%), url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center 20%;
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
    }
    
    /* 浮动数据卡片 */
    .glass-card {
      background: rgba(255,255,255,0.12);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255,255,255,0.25);
      border-radius: 20px;
      padding: 1.2rem 1.8rem;
      color: white;
      box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    }
    
    /* 板块标题装饰 */
    .section-title {
      font-weight: 700;
      color: var(--tactical-black);
      position: relative;
      display: inline-block;
      margin-bottom: 1rem;
    }
    
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 50%;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      background: linear-gradient(90deg, var(--primary-red), var(--champion-gold));
      border-radius: 2px;
    }
    
    /* 卡片样式 */
    .service-card {
      background: white;
      border-radius: var(--border-radius-card);
      padding: 2rem 1.8rem;
      box-shadow: var(--card-shadow);
      transition: var(--transition-base);
      border: 1px solid var(--border-light);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    
    .service-card:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-6px);
      border-bottom: 3px solid var(--primary-red);
    }
    
    .service-card.mid-highlight {
      transform: scale(1.02);
      box-shadow: 0 12px 28px rgba(200,16,46,0.1);
    }
    
    /* 按钮系统 */
    .btn-primary {
      background-color: var(--primary-red);
      color: white;
      font-weight: 600;
      border-radius: var(--border-radius-btn);
      padding: 0.75rem 2rem;
      transition: var(--transition-base);
      display: inline-block;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(200,16,46,0.3);
    }
    
    .btn-primary:hover {
      background-color: var(--deep-red);
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(200,16,46,0.4);
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      font-weight: 600;
      border-radius: var(--border-radius-btn);
      padding: 0.75rem 2rem;
      transition: var(--transition-base);
      display: inline-block;
    }
    
    .btn-outline:hover {
      background: rgba(255,255,255,0.15);
      transform: translateY(-2px);
    }
    
    .btn-gold {
      background-color: var(--champion-gold);
      color: var(--tactical-black);
      font-weight: 700;
      border-radius: var(--border-radius-btn);
      padding: 0.85rem 2.2rem;
      transition: var(--transition-base);
      box-shadow: 0 6px 18px rgba(212,175,55,0.4);
      border: none;
    }
    
    .btn-gold:hover {
      background-color: #e0b830;
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(212,175,55,0.5);
    }
    
    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid #e5e7eb;
    }
    
    .faq-question {
      background-color: var(--tactical-black);
      color: white;
      padding: 1.2rem 1.5rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background-color 0.2s;
      border-radius: 8px 8px 0 0;
    }
    
    .faq-answer {
      background-color: var(--marble-white);
      padding: 0 1.5rem;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s ease;
      border-left: 4px solid var(--grass-green);
    }
    
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 1.5rem;
    }
    
    /* 时间轴案例 */
    .timeline-item {
      position: relative;
      padding-left: 2.5rem;
      border-left: 3px solid var(--primary-red);
      margin-bottom: 2rem;
    }
    
    .timeline-item::before {
      content: '';
      position: absolute;
      left: -9px;
      top: 0;
      width: 16px;
      height: 16px;
      background: var(--champion-gold);
      border-radius: 50%;
      border: 2px solid white;
      box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    }
    
    /* 页脚 */
    .footer-link {
      color: #ccc;
      transition: color 0.2s;
    }
    
    .footer-link:hover {
      color: var(--primary-red);
    }