/* 全局重置与时尚灵动基调 */
 * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  :root {
    --bg-dark: #0b0f1a;
    --bg-card: rgba(255, 255, 255, 0.05);
    --accent: #00e5c7;
    --accent-glow: rgba(0, 229, 199, 0.4);
    --text-primary: #ffffff;
    --text-secondary: #b0b8c5;
    --text-muted: #8b95a5;
    --gradient-start: #00c9b7;
    --gradient-end: #0077ff;
    --glass-border: rgba(255, 255, 255, 0.1);
    --radius-lg: 32px;
    --radius-md: 20px;
    --radius-sm: 12px;
    --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  }

  body {
    background: var(--bg-dark);
    font-family: var(--font-sans);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    padding: 0 0 40px 0;
    background-image: 
      radial-gradient(circle at 20% 10%, rgba(0, 229, 199, 0.15) 0%, transparent 35%),
      radial-gradient(circle at 85% 70%, rgba(0, 119, 255, 0.15) 0%, transparent 40%),
      radial-gradient(circle at 50% 100%, rgba(0, 229, 199, 0.08) 0%, transparent 50%);
    background-attachment: fixed;
  }

  .container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    padding: 20px 16px;
  }

  /* 品牌头部 */
  .brand-header {
    margin-bottom: 28px;
    text-align: left;
  }

  .brand-title {
    font-size: clamp(2rem, 10vw, 2.8rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
    background: linear-gradient(135deg, var(--accent) 0%, #a0f0e0 50%, #4d9aff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    filter: drop-shadow(0 0 18px rgba(0, 229, 199, 0.35));
    margin-bottom: 8px;
  }

  .brand-sub {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 400;
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .brand-sub::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--accent);
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
    100% { opacity: 1; transform: scale(1); }
  }

  /* 简介卡片 */
  .intro-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 22px 20px;
    margin-bottom: 32px;
    box-shadow: 0 20px 35px -10px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 229, 199, 0.1);
    transition: transform 0.2s ease, border-color 0.2s;
  }

  .intro-card:hover {
    border-color: rgba(0, 229, 199, 0.3);
  }

  .stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 22px;
  }

  .stat-item {
    text-align: center;
    padding: 10px 4px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.03);
  }

  .stat-value {
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.2;
    letter-spacing: -0.02em;
  }

  .stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 500;
  }

  .intro-text {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
    border-left: 2px solid var(--accent);
    padding-left: 16px;
    margin-top: 6px;
  }

  .intro-text strong {
    color: var(--accent);
    font-weight: 600;
  }

  /* ===== 视频 Tab 区域 ===== */
  .video-section {
    margin-bottom: 40px;
  }

  .section-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
  }

  .section-title span {
    display: inline-block;
    width: 4px;
    height: 20px;
    background: linear-gradient(to bottom, var(--accent), var(--gradient-end));
    border-radius: 4px;
  }

  /* Tab 标签栏 */
  .video-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    background: rgba(255, 255, 255, 0.03);
    padding: 6px;
    border-radius: 60px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(8px);
  }

  .video-tab {
    flex: 1;
    text-align: center;
    padding: 10px 6px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 60px;
    cursor: pointer;
    transition: all 0.25s ease;
    background: transparent;
    border: none;
    font-family: var(--font-sans);
    letter-spacing: 0.01em;
    white-space: nowrap;
  }

  .video-tab.active {
    background: linear-gradient(135deg, var(--accent), var(--gradient-end));
    color: #04121f;
    font-weight: 700;
    box-shadow: 0 4px 16px rgba(0, 229, 199, 0.35);
  }

  .video-tab:not(.active):hover {
    color: var(--accent);
    background: rgba(0, 229, 199, 0.08);
  }

  /* 视频舞台 —— 统一高度 16:9 */
  .video-stage {
    position: relative;
    width: 100%;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #0c101b;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 15px 30px -10px rgba(0, 0, 0, 0.8);
    aspect-ratio: 16 / 9;
  }

  /* 视频面板容器 */
  .video-panel {
    position: absolute;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease, visibility 0.35s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
  }

  .video-panel.active {
    opacity: 1;
    visibility: visible;
  }

  /* 内部video标签 —— 保持完整比例 */
  .video-panel video {
    width: 100%;
    height: 100%;
    display: block;
    background: #000;
    object-fit: contain;
  }

  /* 视频信息栏 */
  .video-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
  }

  .video-meta span:first-child {
    font-weight: 500;
    color: var(--text-secondary);
  }

  .video-meta span:last-child {
    font-size: 0.7rem;
    background: rgba(0, 229, 199, 0.15);
    padding: 3px 8px;
    border-radius: 30px;
    color: var(--accent);
  }

  /* 校区卡片 */
  .campus-section {
    margin-top: 20px;
  }

  .campus-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .campus-card {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 16px 14px;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
  }

  .campus-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--gradient-end));
    opacity: 0.5;
    transition: opacity 0.2s;
  }

  .campus-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(0, 229, 199, 0.4);
    transform: scale(1.01);
  }

  .campus-card:hover::after {
    opacity: 1;
  }

  .campus-name {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .campus-name::before {
    content: '📍';
    font-size: 0.9rem;
    filter: drop-shadow(0 0 5px var(--accent));
  }

  .campus-addr {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.5;
    word-break: break-word;
  }

  /* 底部 */
  .footer-note {
    margin-top: 32px;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 24px;
  }

  .footer-note strong {
    color: var(--accent);
    font-weight: 600;
  }

  /* 移动端小屏微调 */
  @media (max-width: 380px) {
    .container {
      padding: 16px 12px;
    }
    .stats-grid {
      gap: 8px;
    }
    .stat-value {
      font-size: 1.5rem;
    }
    .campus-grid {
      grid-template-columns: 1fr;
    }
    .video-tab {
      font-size: 0.72rem;
      padding: 8px 4px;
    }
  }

  @media (min-width: 700px) {
    .container {
      max-width: 600px;
    }
    .campus-grid {
      gap: 16px;
    }
  }

  ::-webkit-scrollbar {
    width: 4px;
  }
  ::-webkit-scrollbar-track {
    background: var(--bg-dark);
  }
  ::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 10px;
  }