/* roulang page: index */
:root {
      --primary: #C83E1F;
      --primary-hover: #A83218;
      --secondary-dark: #1A1A1A;
      --warm-bg: #F5F0EB;
      --accent-gold: #E8A735;
      --accent-gold-hover: #D4952A;
      --success-green: #2D6A4F;
      --alert-red: #B22222;
      --white: #FFFFFF;
      --text-dark: #1A1A1A;
      --text-body: #2C2C2C;
      --text-muted: #6B6B6B;
      --border-light: rgba(0,0,0,0.04);
      --border-input: #DDDDDD;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-title: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-body: 'Inter', 'Noto Sans SC', sans-serif;
      --font-number: 'Inter', 'DIN Alternate', sans-serif;
      --transition-default: 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-body);
      background-color: var(--warm-bg);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4 {
      font-family: var(--font-title);
      font-weight: 700;
      color: var(--text-dark);
      letter-spacing: -0.3px;
    }
    
    h1 {
      font-size: 3.5rem;
      line-height: 1.2;
    }
    h2 {
      font-size: 2.4rem;
      margin-bottom: 1rem;
    }
    h3 {
      font-size: 1.35rem;
      margin-bottom: 0.5rem;
    }
    
    .section-title {
      position: relative;
      padding-bottom: 0.75rem;
      margin-bottom: 2.5rem;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 60%;
      height: 4px;
      background: var(--primary);
      border-radius: 2px;
    }
    
    /* 自定义Bootstrap覆盖 */
    .btn-primary-custom {
      background-color: var(--primary);
      border: none;
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      transition: var(--transition-default);
      box-shadow: none;
    }
    .btn-primary-custom:hover, .btn-primary-custom:focus {
      background-color: var(--primary-hover);
      color: white;
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }
    
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 10px 26px;
      border-radius: var(--radius-btn);
      transition: var(--transition-default);
    }
    .btn-outline-custom:hover {
      background-color: var(--primary);
      color: white;
      transform: translateY(-2px);
    }
    
    .btn-gold {
      background-color: var(--accent-gold);
      border: none;
      color: var(--secondary-dark);
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      transition: var(--transition-default);
      box-shadow: var(--shadow-sm);
    }
    .btn-gold:hover {
      background-color: var(--accent-gold-hover);
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
      color: var(--secondary-dark);
    }
    
    .card-custom {
      background: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-default);
      padding: 2rem;
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    
    /* 导航 */
    .navbar-custom {
      background: rgba(245,240,235,0.85);
      backdrop-filter: blur(12px);
      padding: 0.8rem 0;
      transition: background 0.3s ease;
      z-index: 1030;
      border-bottom: 1px solid rgba(0,0,0,0.02);
    }
    .navbar-brand {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 1.7rem;
      color: var(--primary) !important;
      letter-spacing: 1px;
    }
    .nav-link {
      font-weight: 500;
      color: var(--text-dark) !important;
      margin: 0 0.8rem;
      position: relative;
      transition: color 0.2s;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: 0.2s ease;
      transform: translateX(-50%);
    }
    .nav-link:hover {
      color: var(--primary) !important;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    
    /* Hero区块 */
    .hero-section {
      min-height: 90vh;
      background: linear-gradient(135deg, #1A1A1A 0%, #C83E1F 100%);
      position: relative;
      display: flex;
      align-items: center;
      color: white;
      overflow: hidden;
    }
    .hero-section::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.15;
      mix-blend-mode: overlay;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-title {
      font-size: 3.8rem;
      font-weight: 700;
      color: white;
      text-shadow: 0 4px 20px rgba(0,0,0,0.3);
    }
    
    /* 信任信号 */
    .trust-badge {
      background: var(--white);
      border-radius: 40px;
      padding: 0.5rem 1.8rem;
      font-weight: 600;
      color: var(--text-dark);
      box-shadow: var(--shadow-sm);
    }
    
    /* 数字动画 */
    .stat-number {
      font-family: var(--font-number);
      font-weight: 700;
      font-size: 2.8rem;
      color: var(--accent-gold);
    }
    
    /* 手风琴自定义 */
    .accordion-button:not(.collapsed) {
      background-color: transparent;
      color: var(--primary);
      box-shadow: none;
      border-left: 4px solid var(--primary);
    }
    .accordion-button {
      font-weight: 500;
      font-size: 1rem;
      background: white;
      border-left: 4px solid transparent;
      transition: 0.2s;
    }
    .accordion-item {
      border: 1px solid var(--border-light);
      margin-bottom: 0.8rem;
      border-radius: var(--radius-card);
      overflow: hidden;
    }
    
    /* 图片样式 */
    .img-cover {
      width: 100%;
      height: 220px;
      object-fit: cover;
      border-radius: var(--radius-card) var(--radius-card) 0 0;
    }
    .scenario-img {
      height: 200px;
      object-fit: cover;
      border-radius: var(--radius-card);
      transition: transform 0.3s ease;
    }
    .card-custom:hover .scenario-img {
      transform: scale(1.03);
    }
    
    /* 页脚 */
    .footer-dark {
      background: var(--secondary-dark);
      color: rgba(255,255,255,0.8);
    }
    .footer-dark a {
      color: rgba(255,255,255,0.75);
      text-decoration: none;
    }
    .footer-dark a:hover {
      color: var(--primary);
    }
    
    @media (max-width: 768px) {
      h1 { font-size: 2.5rem; }
      h2 { font-size: 1.9rem; }
      .hero-title { font-size: 2.8rem; }
      .navbar-collapse { background: rgba(245,240,235,0.98); padding: 1rem; border-radius: 12px; }
    }
    
    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      animation: bounce 2s infinite;
      color: white;
      font-size: 1.5rem;
    }
    @keyframes bounce {
      0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
      40% { transform: translateX(-50%) translateY(-10px); }
      60% { transform: translateX(-50%) translateY(-5px); }
    }