/* roulang page: index */
:root {
      --deep-emerald: #0B2B26;
      --dark-wood: #2B1B3D;
      --champagne-gold: #C5A87E;
      --matte-copper: #B87351;
      --warm-paper: #F9F8F6;
      --ink-black: #1a1a1a;
      --soft-gray: #F4F2EF;
      --text-primary: #2B2B2B;
      --text-secondary: #555555;
      --text-light: #888888;
      --border-subtle: #E0DCD5;
      --shadow-card: 0 15px 35px -15px rgba(0,0,0,0.12);
      --shadow-hover: 0 25px 45px -15px rgba(0,0,0,0.2);
      --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
      --border-radius-refined: 4px;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--warm-paper);
      color: var(--text-primary);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
      letter-spacing: 0.3px;
    }
    
    h1, h2, h3, .serif-font {
      font-family: "Noto Serif SC", "Times New Roman", "宋体", serif;
      font-weight: 600;
      letter-spacing: 1.5px;
    }
    
    /* 重置Bootstrap默认样式 */
    .container, .container-fluid {
      padding-left: 24px;
      padding-right: 24px;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }
    
    .btn {
      border-radius: var(--border-radius-refined);
      font-weight: 500;
      letter-spacing: 1px;
      padding: 12px 32px;
      transition: var(--transition-smooth);
      text-transform: uppercase;
      font-size: 0.9rem;
    }
    
    .btn-primary-gold {
      background-color: var(--champagne-gold);
      border: 1px solid var(--champagne-gold);
      color: var(--deep-emerald);
      font-weight: 600;
    }
    
    .btn-primary-gold:hover {
      background-color: var(--matte-copper);
      border-color: var(--matte-copper);
      color: white;
      transform: translateY(-2px);
      box-shadow: 0 15px 25px -10px rgba(184, 115, 81, 0.4);
    }
    
    .btn-outline-gold {
      background: transparent;
      border: 1px solid var(--champagne-gold);
      color: var(--champagne-gold);
    }
    
    .btn-outline-gold:hover {
      background-color: rgba(197, 168, 126, 0.1);
      border-color: var(--champagne-gold);
      color: var(--champagne-gold);
    }
    
    /* 信息条 */
    .top-utility-bar {
      background-color: var(--ink-black);
      color: #aaa;
      font-size: 0.8rem;
      height: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 32px;
      letter-spacing: 0.8px;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    
    .top-utility-bar span i {
      color: var(--champagne-gold);
      margin-right: 6px;
    }
    
    /* 主导航 */
    .main-navbar {
      background: rgba(15, 26, 24, 0.85);
      backdrop-filter: blur(15px);
      border-bottom: 1px solid rgba(197, 168, 126, 0.3);
      transition: background 0.4s ease;
      padding: 0 24px;
      z-index: 999;
    }
    
    .navbar-brand {
      font-family: "Noto Serif SC", serif;
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--champagne-gold) !important;
      letter-spacing: 3px;
      transition: 0.3s;
    }
    
    .navbar-brand:hover {
      color: #e0cd9f !important;
    }
    
    .nav-link {
      color: #ccc !important;
      margin: 0 8px;
      font-weight: 500;
      letter-spacing: 1px;
      font-size: 0.9rem;
      position: relative;
      transition: 0.3s;
    }
    
    .nav-link:hover, .nav-link.active {
      color: var(--champagne-gold) !important;
    }
    
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--champagne-gold);
      transition: width 0.3s ease;
    }
    
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    
    .navbar-toggler {
      border-color: var(--champagne-gold);
      color: var(--champagne-gold);
    }
    
    /* Hero区域 */
    .hero-section {
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, rgba(11,43,38,0.85) 0%, rgba(43,27,61,0.7) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-attachment: fixed;
      color: white;
      padding: 0 24px;
    }
    
    .hero-content h1 {
      font-size: 3.8rem;
      font-weight: 700;
      text-shadow: 0 4px 20px rgba(0,0,0,0.6);
      color: white;
      line-height: 1.3;
      letter-spacing: 3px;
    }
    
    .hero-content .gold-text {
      color: var(--champagne-gold);
    }
    
    .hero-subtitle {
      font-size: 1.5rem;
      color: #e0e0e0;
      margin: 24px 0;
      font-weight: 300;
    }
    
    /* 板块标题 */
    .section-title {
      font-size: 2.5rem;
      font-weight: 600;
      color: var(--deep-emerald);
      margin-bottom: 16px;
      text-align: center;
    }
    
    .title-decorator {
      width: 70px;
      height: 3px;
      background-color: var(--champagne-gold);
      margin: 0 auto 48px;
    }
    
    /* 服务卡片 */
    .service-card {
      background: white;
      border-radius: var(--border-radius-refined);
      padding: 40px 28px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
      border-left: 5px solid var(--champagne-gold);
      height: 100%;
    }
    
    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
      border-left-color: var(--matte-copper);
    }
    
    .service-icon {
      font-size: 2.8rem;
      color: var(--champagne-gold);
      margin-bottom: 20px;
    }
    
    /* 数据模块 */
    .stat-number {
      font-family: "Noto Serif SC", serif;
      font-size: 3.2rem;
      font-weight: 700;
      color: var(--champagne-gold);
      line-height: 1.2;
    }
    
    /* 案例卡片 */
    .case-card {
      background: white;
      border-radius: var(--border-radius-refined);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }
    
    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    
    .case-img {
      height: 240px;
      object-fit: cover;
      filter: brightness(0.9);
    }
    
    /* FAQ手风琴 */
    .accordion-button {
      background: transparent;
      font-weight: 500;
      color: var(--deep-emerald);
      box-shadow: none;
      border-left: 3px solid transparent;
      transition: 0.3s;
    }
    
    .accordion-button:not(.collapsed) {
      background-color: var(--soft-gray);
      color: var(--deep-emerald);
      border-left: 4px solid var(--champagne-gold);
    }
    
    .accordion-button:focus {
      border-color: var(--champagne-gold);
      box-shadow: none;
    }
    
    /* 表单 */
    .form-control {
      border: 1px solid var(--border-subtle);
      border-bottom: 2px solid var(--champagne-gold);
      border-radius: 0;
      background: transparent;
      padding: 14px 12px;
      transition: 0.3s;
    }
    
    .form-control:focus {
      border-color: var(--champagne-gold);
      box-shadow: 0 0 0 2px rgba(197,168,126,0.3);
    }
    
    /* 页脚 */
    .footer {
      background-color: #0F1A18;
      color: #999;
      border-top: 2px solid var(--champagne-gold);
    }
    
    .footer a:hover {
      color: var(--champagne-gold) !important;
    }
    
    @media (max-width: 768px) {
      .hero-content h1 {
        font-size: 2.7rem;
      }
      .section-title {
        font-size: 2rem;
      }
      .navbar-brand {
        font-size: 1.4rem;
      }
      .top-utility-bar {
        padding: 0 16px;
      }
    }