/* roulang page: index */
:root {
      --primary-deep: #1A1A2E;
      --accent-gold: #D4AF37;
      --accent-red: #E85D3A;
      --bg-warm: #F5F0EB;
      --card-bg: #FFFFFF;
      --card-bg-alt: #FAF7F2;
      --text-dark: #1A1A2E;
      --text-body: #3D3D3D;
      --text-muted: #6B6B6B;
      --border-soft: #E0D9CF;
      --shadow-card: 0 2px 16px rgba(26,26,46,0.06);
      --shadow-card-hover: 0 8px 24px rgba(26,26,46,0.12);
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --border-radius-input: 6px;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
      --sidebar-width: 240px;
      --sidebar-width-tablet: 200px;
      --transition-base: 0.2s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      display: flex;
      min-height: 100vh;
      overflow-x: hidden;
    }
    h1, h2, h3, h4, h5, h6 {
      color: var(--text-dark);
      font-weight: 600;
      letter-spacing: 0.02em;
    }
    a {
      color: var(--accent-red);
      text-decoration: none;
      transition: color var(--transition-base), text-decoration var(--transition-base);
    }
    a:hover {
      color: #C94A2E;
      text-decoration: underline;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    /* 左侧App Shell导航 */
    .app-sidebar {
      position: fixed;
      left: 0;
      top: 0;
      bottom: 0;
      width: var(--sidebar-width);
      background-color: var(--primary-deep);
      color: white;
      display: flex;
      flex-direction: column;
      z-index: 1040;
      box-shadow: 2px 0 12px rgba(0,0,0,0.08);
      transition: transform 0.3s ease;
    }
    .sidebar-logo {
      padding: 28px 24px 20px;
      font-size: 22px;
      font-weight: 700;
      color: var(--accent-gold);
      letter-spacing: 0.03em;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .sidebar-logo i {
      font-size: 28px;
      color: var(--accent-gold);
    }
    .sidebar-nav {
      flex: 1;
      padding: 8px 12px;
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .sidebar-nav a {
      display: block;
      color: rgba(255,255,255,0.8);
      padding: 12px 16px;
      border-radius: 8px;
      font-weight: 500;
      font-size: 15px;
      transition: all var(--transition-base);
      text-decoration: none;
      position: relative;
      border-left: 3px solid transparent;
    }
    .sidebar-nav a:hover,
    .sidebar-nav a.active {
      background-color: rgba(255,255,255,0.06);
      color: var(--accent-gold);
      border-left-color: var(--accent-gold);
    }
    .sidebar-footer {
      padding: 20px 24px;
      font-size: 13px;
      color: rgba(255,255,255,0.5);
      border-top: 1px solid rgba(255,255,255,0.08);
      display: flex;
      gap: 16px;
    }
    .sidebar-footer a {
      color: rgba(255,255,255,0.5);
      font-size: 18px;
      transition: color 0.2s;
    }
    .sidebar-footer a:hover {
      color: var(--accent-gold);
    }
    /* 右侧主内容区 */
    .main-content {
      margin-left: var(--sidebar-width);
      flex: 1;
      width: 100%;
      background-color: var(--bg-warm);
      transition: margin-left 0.3s ease;
    }
    /* 移动端顶部导航 */
    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 56px;
      background-color: var(--primary-deep);
      color: white;
      z-index: 1050;
      align-items: center;
      padding: 0 16px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }
    .mobile-logo {
      font-size: 20px;
      font-weight: 700;
      color: var(--accent-gold);
    }
    .hamburger-btn {
      margin-left: auto;
      background: transparent;
      border: none;
      color: white;
      font-size: 24px;
      cursor: pointer;
    }
    .mobile-drawer {
      position: fixed;
      top: 56px;
      left: 0;
      right: 0;
      bottom: 0;
      background-color: rgba(26,26,46,0.95);
      backdrop-filter: blur(8px);
      z-index: 1045;
      transform: translateX(-100%);
      transition: transform 0.3s ease;
      display: flex;
      flex-direction: column;
      padding: 24px 16px;
    }
    .mobile-drawer.open {
      transform: translateX(0);
    }
    .mobile-drawer a {
      color: rgba(255,255,255,0.85);
      padding: 14px 16px;
      font-size: 16px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      text-decoration: none;
      display: block;
    }
    .mobile-drawer a:hover {
      color: var(--accent-gold);
      background-color: rgba(255,255,255,0.05);
    }
    /* 容器与板块 */
    .section {
      padding: 70px 0;
      scroll-margin-top: 20px;
    }
    .container-custom {
      max-width: 1140px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--text-dark);
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -6px;
      width: 48px;
      height: 3px;
      background-color: var(--accent-gold);
      border-radius: 2px;
    }
    .text-muted-custom {
      color: var(--text-muted);
      font-size: 15px;
    }
    /* 按钮 */
    .btn-primary-custom {
      background-color: var(--accent-red);
      border: none;
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--border-radius-btn);
      transition: background-color 0.2s, box-shadow 0.2s;
      display: inline-block;
      text-decoration: none;
      box-shadow: 0 2px 8px rgba(232,93,58,0.2);
    }
    .btn-primary-custom:hover {
      background-color: #C94A2E;
      color: white;
      box-shadow: 0 4px 12px rgba(232,93,58,0.3);
    }
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary-deep);
      color: var(--primary-deep);
      font-weight: 600;
      padding: 10px 26px;
      border-radius: var(--border-radius-btn);
      transition: all 0.2s;
    }
    .btn-outline-custom:hover {
      background-color: var(--primary-deep);
      color: white;
    }
    .text-link {
      color: var(--accent-red);
      font-weight: 500;
      transition: 0.2s;
    }
    .text-link:hover {
      text-decoration: underline;
      color: #C94A2E;
    }
    /* 卡片 */
    .card-custom {
      background: var(--card-bg);
      border-radius: var(--border-radius-card);
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-soft);
      transition: transform 0.2s, box-shadow 0.2s;
      overflow: hidden;
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    .card-img-placeholder {
      background-color: #E0D9CF;
      height: 200px;
      background-size: cover;
      background-position: center;
    }
    /* Hero区域 */
    .hero-section {
      background: linear-gradient(135deg, #1A1A2E 0%, #16213E 100%);
      color: white;
      padding: 80px 0;
      position: relative;
      overflow: hidden;
    }
    .hero-title {
      font-size: 48px;
      font-weight: 700;
      color: white;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 18px;
      opacity: 0.9;
      margin-bottom: 32px;
    }
    /* 数据数字墙 */
    .stat-number {
      font-size: 36px;
      font-weight: 700;
      color: var(--accent-gold);
      line-height: 1.2;
    }
    /* FAQ手风琴定制 */
    .accordion-button:not(.collapsed) {
      background-color: var(--card-bg-alt);
      color: var(--text-dark);
      box-shadow: none;
    }
    .accordion-button:focus {
      border-color: var(--border-soft);
      box-shadow: 0 0 0 0.15rem rgba(212,175,55,0.25);
    }
    /* 页脚 */
    .footer-custom {
      background-color: var(--primary-deep);
      color: rgba(255,255,255,0.7);
      padding: 48px 0 24px;
    }
    .footer-custom a {
      color: rgba(255,255,255,0.7);
    }
    .footer-custom a:hover {
      color: var(--accent-gold);
    }
    /* 响应式 */
    @media (max-width: 991px) {
      .app-sidebar {
        display: none;
      }
      .main-content {
        margin-left: 0;
      }
      .mobile-header {
        display: flex;
      }
      .section {
        padding: 56px 0;
      }
      .hero-title {
        font-size: 36px;
      }
    }
    @media (max-width: 767px) {
      .hero-title {
        font-size: 28px;
      }
      .container-custom {
        padding: 0 16px;
      }
    }
    @media (min-width: 1400px) {
      .container-custom {
        max-width: 1200px;
      }
    }