/* roulang page: index */
:root {
      --deep-wood: #3E2723;
      --champagne-gold: #C9A96E;
      --warm-white: #FBF7F2;
      --jade-green: #1B3A2D;
      --charcoal: #2C2C2C;
      --soft-grey: #E8E0D5;
      --card-shadow: 0 4px 20px rgba(62,39,35,0.08);
      --card-shadow-hover: 0 8px 30px rgba(62,39,35,0.15);
      --border-radius-card: 8px;
      --border-radius-lg: 12px;
      --border-radius-btn: 4px;
      --section-padding: 80px 0;
      --transition-base: all 0.3s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: 'Noto Sans SC', sans-serif;
      font-weight: 400;
      line-height: 1.8;
      color: var(--charcoal);
      background-color: var(--warm-white);
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4, h5, h6 {
      font-weight: 700;
      line-height: 1.3;
      color: var(--deep-wood);
    }
    
    a {
      text-decoration: none;
      transition: var(--transition-base);
      color: var(--champagne-gold);
    }
    
    a:hover {
      color: #b8934f;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .section-padding {
      padding: var(--section-padding);
    }
    
    /* 自定义容器微调 */
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 覆盖 Bootstrap 按钮 */
    .btn {
      border-radius: var(--border-radius-btn);
      padding: 12px 32px;
      font-weight: 500;
      transition: var(--transition-base);
      border: 1px solid transparent;
      letter-spacing: 0.3px;
    }
    
    .btn-primary-custom {
      background-color: var(--champagne-gold);
      color: var(--deep-wood);
      border: 1px solid var(--champagne-gold);
    }
    
    .btn-primary-custom:hover {
      background-color: #b8934f;
      border-color: #b8934f;
      color: var(--deep-wood);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(201,169,110,0.25);
    }
    
    .btn-outline-custom {
      background: transparent;
      border: 1px solid var(--champagne-gold);
      color: var(--champagne-gold);
    }
    
    .btn-outline-custom:hover {
      background-color: var(--champagne-gold);
      color: var(--deep-wood);
      border-color: var(--champagne-gold);
      transform: translateY(-2px);
    }
    
    /* 导航栏自定义 */
    .navbar-custom {
      background-color: var(--warm-white);
      border-bottom: 1px solid var(--soft-grey);
      padding: 12px 0;
      transition: box-shadow 0.3s ease;
    }
    
    .navbar-custom.sticky-top {
      box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    }
    
    .navbar-brand-custom {
      font-size: 24px;
      font-weight: 700;
      color: var(--champagne-gold) !important;
      letter-spacing: 1px;
      white-space: nowrap;
    }
    
    .navbar-custom .nav-link {
      color: var(--deep-wood) !important;
      font-weight: 500;
      margin: 0 12px;
      padding: 8px 0 !important;
      position: relative;
      font-size: 16px;
      transition: color 0.2s;
    }
    
    .navbar-custom .nav-link:hover,
    .navbar-custom .nav-link.active {
      color: var(--champagne-gold) !important;
    }
    
    .navbar-custom .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--champagne-gold);
      transition: width 0.3s;
    }
    
    .navbar-custom .nav-link:hover::after,
    .navbar-custom .nav-link.active::after {
      width: 100%;
    }
    
    .navbar-toggler {
      border: none;
      color: var(--deep-wood);
      font-size: 1.5rem;
    }
    
    .navbar-toggler:focus {
      box-shadow: none;
    }
    
    /* 首屏 Hero */
    .hero-section {
      background: linear-gradient(0deg, rgba(62,39,35,0.75) 0%, rgba(62,39,35,0.65) 100%), url('/assets/images/backpic/back-1.webp') center center/cover no-repeat;
      min-height: 80vh;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }
    
    .hero-title {
      font-size: 60px;
      font-weight: 700;
      line-height: 1.2;
      color: white;
      text-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }
    
    .hero-sub {
      font-size: 20px;
      font-weight: 400;
      color: rgba(255,255,255,0.9);
      margin: 24px 0 32px;
      letter-spacing: 1px;
    }
    
    /* 卡片样式 */
    .card-custom {
      background: var(--warm-white);
      border: 1px solid var(--soft-grey);
      border-radius: var(--border-radius-card);
      box-shadow: var(--card-shadow);
      transition: var(--transition-base);
      height: 100%;
      padding: 32px 24px;
    }
    
    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-shadow-hover);
      border-color: var(--champagne-gold);
    }
    
    .icon-circle {
      width: 64px;
      height: 64px;
      background: rgba(201,169,110,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--champagne-gold);
      font-size: 28px;
      margin-bottom: 20px;
    }
    
    /* 图片占位 */
    .img-placeholder {
      background-color: var(--soft-grey);
      width: 100%;
      aspect-ratio: 16 / 9;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #9e8e7e;
      font-weight: 500;
      border-radius: var(--border-radius-card) var(--border-radius-card) 0 0;
      font-size: 14px;
    }
    
    /* 场景图文交错 */
    .scene-img {
      background: var(--soft-grey);
      border-radius: var(--border-radius-lg);
      aspect-ratio: 4/3;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #8b7a6b;
      font-weight: 500;
    }
    
    /* 手风琴 */
    .accordion-custom .accordion-button {
      background: var(--warm-white);
      color: var(--deep-wood);
      font-weight: 500;
      box-shadow: none;
      border: 1px solid var(--soft-grey);
      border-radius: var(--border-radius-card) !important;
      padding: 18px 24px;
    }
    
    .accordion-custom .accordion-button:not(.collapsed) {
      background: var(--warm-white);
      color: var(--champagne-gold);
      border-color: var(--champagne-gold);
    }
    
    .accordion-custom .accordion-body {
      background: var(--warm-white);
      border: 1px solid var(--soft-grey);
      border-top: none;
      border-radius: 0 0 var(--border-radius-card) var(--border-radius-card);
      padding: 20px 24px;
      color: var(--charcoal);
    }
    
    /* CTA 区 */
    .cta-section {
      background-color: var(--deep-wood);
    }
    
    /* 页脚 */
    .footer-custom {
      background: var(--deep-wood);
      color: rgba(255,255,255,0.8);
      padding: 40px 0 20px;
    }
    
    .footer-custom a {
      color: rgba(255,255,255,0.7);
    }
    
    .footer-custom a:hover {
      color: var(--champagne-gold);
    }
    
    /* 数据强调 */
    .stat-number {
      font-size: 36px;
      font-weight: 700;
      color: var(--champagne-gold);
    }
    
    /* 响应式调整 */
    @media (max-width: 1199px) {
      .hero-title {
        font-size: 48px;
      }
    }
    
    @media (max-width: 991px) {
      .hero-title {
        font-size: 40px;
      }
      .navbar-custom .nav-link {
        margin: 6px 0;
      }
    }
    
    @media (max-width: 767px) {
      .section-padding {
        padding: 60px 0;
      }
      .hero-title {
        font-size: 32px;
      }
      .hero-sub {
        font-size: 18px;
      }
      .btn {
        padding: 12px 24px;
        width: 100%;
        margin-bottom: 8px;
      }
      .card-custom {
        padding: 24px;
      }
    }