/* roulang page: index */
/* ----- 自定义设计变量 ----- */
    :root {
      --deep-purple: #2D1B3E;
      --deep-purple-hover: #4A2C5D;
      --champagne-gold: #D4AF37;
      --champagne-light: rgba(212,175,55,0.20);
      --bg-light: #F8F7F4;
      --text-dark: #1E1E1E;
      --text-secondary: #5A5A5A;
      --success-green: #0F9B8E;
      --white: #FFFFFF;
      --border-gold: rgba(212,175,55,0.25);
      --card-shadow: 0 8px 28px rgba(45,27,62,0.06);
      --card-shadow-hover: 0 16px 38px rgba(45,27,62,0.12);
      --radius-card: 20px;
      --radius-btn: 50px;
      --font-heading: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-body: 'Inter', 'Noto Sans SC', sans-serif;
      --nav-width: 240px;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      font-family: var(--font-body);
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      font-weight: 600;
      letter-spacing: -0.3px;
    }
    
    h1 {
      font-size: 48px;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.2;
    }
    
    h2 {
      font-size: 36px;
      font-weight: 600;
      margin-bottom: 0.5rem;
    }
    
    h3 {
      font-size: 22px;
      font-weight: 600;
    }
    
    .text-secondary {
      color: var(--text-secondary);
    }
    
    .container-main {
      max-width: 1280px;
      margin: 0 auto;
    }
    
    /* 左侧竖向导航布局 (桌面) */
    .app-layout {
      display: flex;
      min-height: 100vh;
    }
    
    .sidebar-nav {
      width: var(--nav-width);
      background-color: var(--deep-purple);
      color: white;
      position: fixed;
      top: 0;
      left: 0;
      height: 100vh;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      z-index: 30;
      box-shadow: 4px 0 20px rgba(0,0,0,0.08);
      padding: 2rem 1.2rem;
      transition: transform 0.3s ease;
    }
    
    .main-content {
      margin-left: var(--nav-width);
      flex: 1;
      background-color: var(--bg-light);
    }
    
    /* 导航Logo区 */
    .logo-area {
      text-align: center;
      margin-bottom: 2.5rem;
    }
    
    .logo-icon {
      font-size: 48px;
      color: var(--champagne-gold);
      margin-bottom: 0.25rem;
      display: block;
    }
    
    .logo-text {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.8rem;
      color: white;
      letter-spacing: 1px;
    }
    
    .logo-domain {
      font-size: 0.8rem;
      color: rgba(255,255,255,0.65);
      display: block;
      margin-top: 4px;
    }
    
    .nav-links {
      list-style: none;
      margin-top: 1.8rem;
    }
    
    .nav-links li {
      margin-bottom: 0.8rem;
    }
    
    .nav-links a {
      color: rgba(255,255,255,0.8);
      text-decoration: none;
      font-weight: 500;
      display: block;
      padding: 0.5rem 1rem;
      border-radius: 40px;
      transition: all 0.2s;
      position: relative;
      font-size: 1rem;
    }
    
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--champagne-gold);
      background: rgba(255,255,255,0.08);
      border-left: 3px solid var(--champagne-gold);
      padding-left: 0.8rem;
    }
    
    .sidebar-footer {
      margin-top: auto;
      display: flex;
      justify-content: center;
      gap: 1.5rem;
      color: var(--champagne-gold);
      font-size: 1.4rem;
      padding-bottom: 1rem;
    }
    
    /* 移动端导航 */
    .mobile-header {
      display: none;
      background: var(--deep-purple);
      color: white;
      padding: 0.9rem 1.5rem;
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 35;
      align-items: center;
      justify-content: space-between;
    }
    
    .mobile-logo {
      font-weight: 700;
      font-size: 1.5rem;
      color: white;
    }
    
    .hamburger {
      font-size: 1.8rem;
      cursor: pointer;
      color: var(--champagne-gold);
    }
    
    .mobile-menu {
      display: none;
      position: fixed;
      top: 60px;
      left: 0;
      width: 100%;
      background: var(--deep-purple);
      flex-direction: column;
      padding: 1.5rem;
      z-index: 34;
      box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    }
    
    .mobile-menu a {
      color: white;
      padding: 0.8rem 1rem;
      display: block;
      border-radius: 8px;
    }
    
    /* 板块通用 */
    .section {
      padding: 100px 0;
    }
    
    @media (max-width: 1024px) {
      .sidebar-nav {
        display: none;
      }
      .main-content {
        margin-left: 0;
      }
      .mobile-header {
        display: flex;
      }
      .section {
        padding: 70px 0;
      }
    }
    
    /* 按钮 */
    .btn-primary {
      background: linear-gradient(135deg, #D4AF37 0%, #e6c65d 100%);
      color: var(--deep-purple);
      font-weight: 700;
      padding: 14px 40px;
      border-radius: var(--radius-btn);
      border: none;
      text-decoration: none;
      display: inline-block;
      transition: all 0.25s;
      box-shadow: 0 6px 18px rgba(212,175,55,0.3);
      letter-spacing: 0.5px;
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, #c9a633 0%, #dbb340 100%);
      box-shadow: 0 12px 28px rgba(212,175,55,0.5);
      color: var(--deep-purple);
    }
    
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--deep-purple);
      color: var(--deep-purple);
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: 0.2s;
      text-decoration: none;
      display: inline-block;
    }
    .btn-outline:hover {
      background: rgba(45,27,62,0.05);
    }
    
    /* 卡片 */
    .card-custom {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-gold);
      transition: all 0.25s;
    }
    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-shadow-hover);
    }
    
    .stat-number {
      font-size: 42px;
      font-weight: 700;
      color: var(--success-green);
      line-height: 1.2;
    }
    
    /* FAQ手风琴自定义 */
    .accordion-faq .accordion-item {
      background: white;
      border-radius: 16px;
      margin-bottom: 12px;
      border-left: 4px solid var(--champagne-gold);
      overflow: hidden;
    }
    
    .accordion-title {
      background: white;
      font-weight: 600;
      padding: 1.2rem 1.8rem;
      cursor: pointer;
    }
    
    .footer-dark {
      background: #1A1422;
      color: #ccc;
    }
    
    @media (max-width: 768px) {
      h1 { font-size: 36px; }
      h2 { font-size: 28px; }
    }