/* roulang page: index */
:root {
      --primary: #8B1E1E;
      --primary-hover: #A52929;
      --gold: #D4A853;
      --gold-hover: #C9A84C;
      --deep-blue: #1A1A2E;
      --bg-warm: #FAF7F2;
      --text-main: #2D2D2D;
      --text-muted: #5A5A5A;
      --border-soft: #E5D9C4;
      --card-shadow: 0 4px 20px rgba(0,0,0,0.04);
      --card-shadow-hover: 0 12px 32px rgba(139,30,30,0.12);
      --radius-card: 16px;
      --radius-btn: 10px;
      --radius-input: 8px;
      --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --transition-base: 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4, h5, h6 {
      font-weight: 600;
      color: var(--text-main);
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition-base);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    /* 自定义容器微调 */
    .container-custom {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 16px;
      padding-right: 16px;
    }
    
    /* 区块间距 */
    section {
      padding: 100px 0;
    }
    
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }
    
    /* ----- 导航 ----- */
    .navbar-custom {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(250,247,242,0.8);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(229,217,196,0.6);
      z-index: 1000;
      transition: background var(--transition-base), box-shadow var(--transition-base);
      display: flex;
      align-items: center;
      padding: 0 32px;
    }
    
    .navbar-scrolled {
      background: rgba(250,247,242,0.98);
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    }
    
    .nav-logo {
      font-size: 22px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 1px;
      white-space: nowrap;
      margin-right: auto;
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      position: relative;
      padding: 4px 0;
      transition: color var(--transition-base);
    }
    
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--gold);
      transition: width var(--transition-base);
    }
    
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }
    
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    
    .nav-cta {
      background: var(--gold);
      color: var(--deep-blue) !important;
      padding: 8px 20px !important;
      border-radius: 30px;
      font-weight: 700;
      margin-left: 16px;
      transition: background var(--transition-base), transform var(--transition-base);
      display: inline-block;
    }
    
    .nav-cta:hover {
      background: var(--gold-hover);
      transform: translateY(-2px);
      color: var(--deep-blue) !important;
    }
    
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
      padding: 8px;
    }
    
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
      transition: var(--transition-base);
    }
    
    /* 移动端菜单 */
    .mobile-menu {
      position: fixed;
      top: 0;
      right: 0;
      width: 100%;
      height: 100vh;
      background: var(--deep-blue);
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 32px;
      z-index: 999;
      transform: translateX(100%);
      transition: transform 0.35s ease;
      list-style: none;
      padding: 0;
    }
    
    .mobile-menu.active {
      transform: translateX(0);
    }
    
    .mobile-menu a {
      color: white;
      font-size: 22px;
      font-weight: 500;
      letter-spacing: 2px;
    }
    
    .mobile-close {
      position: absolute;
      top: 24px;
      right: 32px;
      background: transparent;
      border: none;
      color: white;
      font-size: 32px;
      cursor: pointer;
    }
    
    @media (max-width: 991px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .navbar-custom {
        padding: 0 20px;
      }
    }
    
    /* ----- 通用标题装饰线 ----- */
    .section-title {
      font-size: 36px;
      font-weight: 600;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }
    
    .section-title::after {
      content: '';
      display: block;
      width: 40px;
      height: 2px;
      background: var(--gold);
      margin-top: 12px;
    }
    
    .text-center .section-title::after {
      margin-left: auto;
      margin-right: auto;
    }
    
    /* 按钮系统 */
    .btn-primary-custom {
      background: var(--primary);
      color: white;
      border: none;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: background var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
    }
    .btn-primary-custom:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(139,30,30,0.3);
      color: white;
    }
    
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all var(--transition-base);
    }
    .btn-outline-custom:hover {
      background: var(--primary);
      color: white;
    }
    
    .btn-gold {
      background: var(--gold);
      color: var(--deep-blue);
      font-weight: 700;
      padding: 16px 40px;
      border-radius: var(--radius-btn);
      border: none;
      transition: background var(--transition-base), transform var(--transition-base);
    }
    .btn-gold:hover {
      background: var(--gold-hover);
      transform: translateY(-2px);
      color: var(--deep-blue);
    }
    
    /* Hero */
    .hero-section {
      height: 100vh;
      background: linear-gradient(135deg, #1A1A2E 0%, #8B1E1E 100%);
      position: relative;
      display: flex;
      align-items: center;
      color: white;
      overflow: hidden;
    }
    
    .hero-pattern {
      position: absolute;
      inset: 0;
      background-image: repeating-linear-gradient(45deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 2px, transparent 2px, transparent 8px);
      pointer-events: none;
    }
    
    .hero-content {
      position: relative;
      z-index: 2;
    }
    
    .hero h1 {
      font-size: 56px;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.2;
      color: white;
      margin-bottom: 20px;
    }
    
    .hero .subtitle {
      font-size: 20px;
      font-weight: 400;
      color: rgba(255,255,255,0.85);
      margin-bottom: 32px;
    }
    
    .hero .gold-line {
      width: 60px;
      height: 2px;
      background: var(--gold);
      margin: 24px 0;
    }
    
    @media (max-width: 768px) {
      .hero h1 {
        font-size: 36px;
      }
    }
    
    /* 服务卡片 */
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      height: 100%;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-shadow-hover);
    }
    .service-img {
      height: 180px;
      object-fit: cover;
      width: 100%;
    }
    .service-body {
      padding: 24px;
    }
    
    /* 优势数据 */
    .stat-badge {
      background: linear-gradient(180deg, #F5EFE0 0%, #FAF7F2 100%);
      border-radius: 20px;
      padding: 32px 16px;
      text-align: center;
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--primary);
    }
    
    /* 案例卡片 */
    .case-card {
      position: relative;
      border-radius: var(--radius-card);
      overflow: hidden;
      height: 280px;
      background-size: cover;
      background-position: center;
    }
    .case-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(transparent, rgba(0,0,0,0.7));
      padding: 24px;
      color: white;
    }
    
    /* FAQ */
    .accordion-custom .accordion-button {
      background: transparent;
      font-weight: 500;
      font-size: 18px;
      color: var(--text-main);
      border-bottom: 1px solid var(--border-soft);
      padding: 18px 0;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--primary);
      background: transparent;
      box-shadow: none;
      border-left: 4px solid var(--gold);
      padding-left: 16px;
    }
    
    /* 表单 */
    .form-control-custom {
      border-radius: var(--radius-input);
      border: 1px solid var(--gold);
      padding: 12px 16px;
      background: white;
    }
    
    footer {
      background: var(--deep-blue);
      color: #B0B0C0;
      padding: 60px 0 30px;
    }