/* roulang page: index */
/* 自定义设计变量与深度覆盖，确保现代体育数据风格 */
    :root {
      --primary-orange: #FF4D2E;
      --primary-orange-light: #FF6B4A;
      --deep-black-blue: #0B0E1A;
      --card-bg: #111624;
      --scoreboard-white: #F2F4F7;
      --data-green: #00E676;
      --warning-yellow: #FFB800;
      --text-primary: #FFFFFF;
      --text-secondary: #A0A8C0;
      --border-subtle: rgba(255,255,255,0.06);
      --glass-bg: rgba(17,22,36,0.7);
      --font-mono: 'Roboto Mono', 'DIN Alternate', 'Courier New', monospace;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --radius-card: 16px;
      --radius-sm: 12px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --shadow-hover: 0 12px 40px rgba(0,0,0,0.6);
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--deep-black-blue);
      color: var(--text-primary);
      margin: 0;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    
    /* 容器 */
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    
    /* 背景交替板块 */
    .section-alt {
      background-color: var(--card-bg);
    }
    
    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: all 0.25s ease;
    }
    .glass-card:hover {
      box-shadow: var(--shadow-hover), 0 0 0 1px var(--primary-orange);
      border-color: rgba(255,77,46,0.3);
    }
    
    /* 按钮系统 */
    .btn-primary {
      background: linear-gradient(135deg, var(--primary-orange), var(--primary-orange-light));
      border: none;
      border-radius: 50px;
      padding: 14px 32px;
      font-weight: 600;
      color: white;
      box-shadow: 0 0 20px rgba(255,77,46,0.5);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      letter-spacing: 0.5px;
    }
    .btn-primary:hover {
      box-shadow: 0 0 30px rgba(255,77,46,0.8);
      transform: scale(1.03);
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.4);
      border-radius: 50px;
      padding: 12px 28px;
      font-weight: 500;
      color: var(--text-primary);
      transition: 0.2s;
      display: inline-flex;
      align-items: center;
    }
    .btn-outline:hover {
      border-color: var(--primary-orange);
      background: rgba(255,77,46,0.08);
      color: white;
    }
    
    /* 数据标签 */
    .badge-green {
      background: rgba(0,230,118,0.15);
      border: 1px solid var(--data-green);
      color: var(--data-green);
      border-radius: 20px;
      padding: 4px 12px;
      font-size: 0.8rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .live-dot {
      width: 8px;
      height: 8px;
      background: var(--data-green);
      border-radius: 50%;
      display: inline-block;
      animation: pulse 1.8s infinite;
      box-shadow: 0 0 8px var(--data-green);
    }
    @keyframes pulse {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.6; transform: scale(1.3); }
      100% { opacity: 1; transform: scale(1); }
    }
    
    /* 文字层级 */
    h1 { font-size: 44px; font-weight: 700; line-height: 1.2; }
    h2 { font-size: 32px; font-weight: 700; margin-bottom: 1rem; }
    h3 { font-size: 20px; font-weight: 700; }
    .text-mono { font-family: var(--font-mono); }
    
    /* 导航样式 */
    .nav-channel a {
      color: var(--text-secondary);
      padding-bottom: 6px;
      border-bottom: 2px solid transparent;
      transition: 0.2s;
      font-weight: 500;
    }
    .nav-channel a:hover, .nav-channel a.active {
      color: white;
      border-bottom-color: var(--primary-orange);
    }
    
    /* 移动端菜单 */
    @media (max-width: 768px) {
      h1 { font-size: 36px; }
      h2 { font-size: 26px; }
      .container { padding-left: 16px; padding-right: 16px; }
      .mobile-hidden { display: none; }
      .mobile-stack { flex-direction: column; align-items: flex-start; }
    }
    
    /* 手风琴 */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .faq-question {
      cursor: pointer;
      padding: 20px 0;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: var(--text-secondary);
    }
    
    /* 数字墙 */
    .stat-number {
      font-family: var(--font-mono);
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--primary-orange);
      text-shadow: 0 0 10px rgba(255,77,46,0.4);
    }