/* roulang page: index */
:root {
      /* 品牌色彩系统 */
      --primary: #1B3A2D;       /* 墨竹绿 */
      --primary-deep: #0F231B;
      --secondary: #F5F7FA;     /* 竞技白 */
      --accent: #F27A33;        /* 高亮橙 */
      --accent-hover: #E06920;
      --dark: #1E1E1E;         /* 石墨黑 */
      --white: #FFFFFF;
      --success: #2D9C5E;
      --danger: #D94A4A;
      --gray-light: #F9FAFB;
      --gray-border: #D1D5DB;
      --text-body: #4B5563;
      --text-muted: #6B7280;
      
      /* 圆角与阴影 */
      --radius-card: 16px;
      --radius-btn: 8px;
      --shadow-card: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.08);
      --shadow-nav: 0 2px 8px rgba(0,0,0,0.02);
      
      /* 间距 */
      --section-gap: 5rem;
      --container-padding: 24px;
      
      /* Bootstrap 覆盖变量 */
      --bs-primary: #1B3A2D;
      --bs-body-bg: #F5F7FA;
      --bs-body-color: #4B5563;
      --bs-border-radius: 8px;
      --bs-font-sans-serif: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, -apple-system, sans-serif;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--bs-font-sans-serif);
      background-color: var(--secondary);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4, h5 {
      color: var(--dark);
      font-weight: 700;
      line-height: 1.3;
    }
    
    h1 { font-size: 2.5rem; letter-spacing: -0.5px; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; font-weight: 600; }
    h4 { font-size: 1.25rem; font-weight: 600; }
    
    p {
      margin-bottom: 1.2rem;
      font-weight: 400;
    }
    
    .text-small {
      font-size: 0.875rem;
      line-height: 1.5;
    }
    
    a {
      color: var(--accent);
      text-decoration: none;
      transition: color 0.2s;
    }
    a:hover {
      color: var(--accent-hover);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    /* 容器微调 */
    .container-lg {
      max-width: 1140px;
      padding-left: var(--container-padding);
      padding-right: var(--container-padding);
    }
    
    /* 按钮系统 */
    .btn {
      border-radius: var(--radius-btn);
      padding: 0.7rem 1.8rem;
      font-weight: 600;
      transition: all 0.25s ease;
      border: 2px solid transparent;
      font-size: 1rem;
      letter-spacing: 0.3px;
    }
    .btn-primary {
      background-color: var(--accent);
      border-color: var(--accent);
      color: white;
    }
    .btn-primary:hover, .btn-primary:focus {
      background-color: var(--accent-hover);
      border-color: var(--accent-hover);
      color: white;
      box-shadow: 0 4px 12px rgba(242,122,51,0.3);
    }
    .btn-outline-dark {
      border: 2px solid var(--dark);
      color: var(--dark);
      background: transparent;
    }
    .btn-outline-dark:hover {
      background-color: rgba(27,58,45,0.08);
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-lg {
      padding: 0.9rem 2.5rem;
      font-size: 1.1rem;
    }
    .btn-sm {
      padding: 0.5rem 1.5rem;
    }
    
    /* 卡片视觉 */
    .card-custom {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      padding: 2rem;
      border: none;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    
    /* 导航双层系统 */
    .navbar-custom {
      background: var(--white);
      box-shadow: var(--shadow-nav);
      position: sticky;
      top: 0;
      z-index: 1020;
      backdrop-filter: blur(6px);
      background-color: rgba(255,255,255,0.92);
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--dark);
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 700;
      font-size: 1.2rem;
      position: relative;
      overflow: hidden;
    }
    .logo-icon::after {
      content: "🐼";
      font-size: 1.3rem;
      position: absolute;
    }
    .channel-tabs {
      background: var(--secondary);
      border-top: 1px solid rgba(0,0,0,0.04);
      padding: 0.6rem 0;
    }
    .nav-pills-custom {
      display: flex;
      flex-wrap: nowrap;
      overflow-x: auto;
      scrollbar-width: none;
      -ms-overflow-style: none;
      gap: 0.5rem;
      padding-bottom: 2px;
    }
    .nav-pills-custom::-webkit-scrollbar {
      display: none;
    }
    .nav-pill-link {
      white-space: nowrap;
      padding: 0.5rem 1.3rem;
      border-radius: 30px;
      color: var(--text-body);
      font-weight: 500;
      transition: all 0.2s;
      background: transparent;
      border: none;
      font-size: 0.95rem;
    }
    .nav-pill-link.active {
      background: var(--white);
      color: var(--dark);
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
      border-bottom: 3px solid var(--accent);
      border-radius: 30px 30px 0 0;
      font-weight: 600;
    }
    .nav-pill-link:hover:not(.active) {
      color: var(--primary);
      background: rgba(27,58,45,0.04);
    }
    
    /* Hero区域 */
    .hero-section {
      min-height: 100vh;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      display: flex;
      align-items: center;
      color: white;
    }
    .hero-overlay {
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background: linear-gradient(135deg, rgba(27,58,45,0.8) 0%, rgba(15,35,27,0.6) 100%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
    }
    .hero-title {
      color: white;
      font-size: 2.8rem;
      font-weight: 700;
      text-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }
    .floating-score-card {
      background: rgba(255,255,255,0.15);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      padding: 1.2rem 2rem;
      color: white;
      display: inline-block;
      margin-top: 2rem;
      border: 1px solid rgba(255,255,255,0.2);
    }
    .digit-animation {
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent);
    }
    
    /* 数据条 */
    .stats-bar {
      background: rgba(27,58,45,0.1);
      border-radius: 24px;
      padding: 2.5rem 1rem;
    }
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.2;
    }
    
    /* 手风琴 */
    .accordion-custom .accordion-button {
      background: white;
      font-weight: 600;
      color: var(--dark);
      box-shadow: none;
      border-left: 4px solid transparent;
      transition: 0.2s;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      background: var(--gray-light);
      border-left: 4px solid var(--accent);
      color: var(--primary);
    }
    .accordion-custom .accordion-body {
      background: var(--gray-light);
      padding: 20px;
    }
    
    /* 页脚 */
    .footer-dark {
      background: var(--dark);
      color: var(--secondary);
    }
    .footer-dark a {
      color: #ccc;
    }
    .footer-dark a:hover {
      color: var(--accent);
    }
    
    /* 响应式调整 */
    @media (max-width: 768px) {
      h1 { font-size: 2rem; }
      .hero-title { font-size: 2.2rem; }
      .hero-section { min-height: 90vh; }
      .card-custom { padding: 1.5rem; }
      .stat-number { font-size: 2.5rem; }
    }