:root {
      --primary: #0891b2;
      --primary-dark: #0e7490;
      --primary-light: #06b6d4;
      --bg: #ffffff;
      --card: #ffffff;
      --dark: #0f172a;
      --text: #1e293b;
      --text-2: #64748b;
      --text-3: #94a3b8;
      --border: #e5e7eb;
      --r-sm: 6px;
      --r-md: 10px;
      --r-lg: 16px;
      --ease: cubic-bezier(.4,0,.2,1);
      --max: 1280px;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 10px; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
      background: var(--bg);
      color: var(--text);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; transition: color .15s ease; }
    a:hover { color: var(--primary); }

    /* 导航栏 */
    .navbar {
      position: sticky;
      top: 0;
      z-index: 100;
      background: linear-gradient(90deg, #0f172a 0%, #0c4a6e 50%, #0e7490 100%);
    }
    .navbar-inner {
      max-width: var(--max);
      margin: 0 auto;
      padding: 0 32px;
      height: 70px;
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
    .logo-icon {
      width: 44px; height: 44px;
      background: var(--primary);
      border-radius: var(--r-md);
      display: flex; align-items: center; justify-content: center;
      color: #fff; font-weight: 900; font-size: 20px;
      box-shadow: 0 4px 16px rgba(8,145,178,0.4);
    }
    .logo-text { font-size: 20px; font-weight: 800; color: #fff; }
    .logo-text span { color: #22d3ee; }
    .logo-desc { font-size: 1.1rem; color: #64748b; margin-left: 12px; padding-left: 12px; border-left: 1px solid rgba(255,255,255,0.1); }
    .search-wrap { flex: 1; max-width: 560px; }
    .search-box {
      display: flex;
      background: rgba(255,255,255,0.1);
      border: 1.5px solid rgba(255,255,255,0.15);
      border-radius: 50px;
      overflow: hidden;
      transition: all .2s ease;
    }
    .search-box:focus-within {
      background: rgba(255,255,255,0.15);
      border-color: var(--primary-light);
      box-shadow: 0 0 0 3px rgba(6,182,212,0.15);
    }
    .search-box input {
      flex: 1; padding: 11px 20px; border: none; outline: none;
      font-size: 14px; color: #fff; background: transparent;
    }
    .search-box input::placeholder { color: #fff; }
    .search-box button {
      padding: 11px 22px;
      background: var(--primary);
      color: #fff; border: none; font-size: 14px; font-weight: 600;
      cursor: pointer; display: flex; align-items: center; gap: 6px;
      transition: background .2s ease;
    }
    .search-box button:hover { background: var(--primary-dark); }
    .search-box button svg { width: 16px; height: 16px; }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
      margin-left: auto;
    }
    .btn-ghost {
      padding: 9px 20px;
      font-size: 13px;
      font-weight: 600;
      color: rgba(255,255,255,0.7);
      background: transparent;
      border: 1.5px solid rgba(255,255,255,0.2);
      border-radius: var(--r-sm);
      cursor: pointer;
      transition: all .15s ease;
    }
    .btn-ghost:hover { background: rgba(255,255,255,0.1); color: #fff; border-color: rgba(255,255,255,0.4); }
    .btn-primary {
      padding: 9px 20px;
      font-size: 13px;
      font-weight: 600;
      color: #fff;
      background: var(--primary);
      border: none;
      border-radius: var(--r-sm);
      cursor: pointer;
      transition: all .15s ease;
    }
    .btn-primary:hover { background: var(--primary-dark); }

       /* 页头 大留白 */
    .page-header {
      background: var(--bg);
      padding: 0 32px;
      position: relative;
      overflow: hidden;
    }
    .page-header-bg {
      position: absolute;
      top: 0; right: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, rgba(8,145,178,0.04) 0%, rgba(6,182,212,0.08) 100%);
      border-left: 1px solid var(--border);
      pointer-events: none;
    }
    .page-header-accent {
      position: absolute;
      top: -80px; right: 15%;
      width: 200px; height: 200px;
      background: radial-gradient(circle, rgba(6,182,212,0.12) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }
        .page-header-inner {
      max-width: var(--max);
      margin: 0 auto;
      padding: 72px 0 64px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      position: relative;
      z-index: 1;
    }
    .page-header-label {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 2px;
      text-transform: uppercase;
      margin-bottom: 20px;
    }
    .page-header-label::before {
      content: '';
      width: 20px; height: 2px;
      background: var(--primary);
      border-radius: 1px;
    }
    .page-header h1 {
      font-size: 5.6rem;
      font-weight: 900;
      color: var(--dark);
      letter-spacing: -2px;
      line-height: 1;
      margin-bottom: 20px;
    }
    .page-header h1 span { color: var(--primary); }
    .page-header-desc {
      font-size: 1.5rem;
      color: var(--text-2);
      letter-spacing: 3px;
    }
    .page-header-desc span { color: var(--primary); font-weight: 700; }
    /* 内容区 */
    .main { flex: 1; max-width: var(--max); width: 100%; margin: 0 auto; padding: 40px 32px 64px; }

    /* 分类标签 */
    .cat-tags {
      display: grid;
      grid-template-columns: repeat(8, 1fr);
      gap: 10px;
    }
    .cat-tag {
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 10px 8px;
      background: var(--bg);
      border: 1.5px solid var(--border);
      border-radius: 50px;
      font-size: 1.3rem;
      font-weight: 600;
      color: var(--text-2);
      text-align: center;
      transition: all .2s ease;
      overflow: hidden;
      white-space: nowrap;
    }
    .cat-tag:hover { border-color: var(--primary); color: var(--primary); box-shadow: 0 0 0 3px rgba(8,145,178,0.08); }
    .cat-tag .cat-cnt { font-size: 1.1rem; color: var(--text-3); margin-left: 6px; flex-shrink: 0; }

    /* 页脚 */
    .footer { background: #f8fafc; border-top: 1px solid var(--border); padding: 32px; }
    .footer-inner { max-width: var(--max); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .footer-copy { font-size: 1.3rem; color: var(--text-3); }
    .footer-copy a { color: var(--text-3); }
    .footer-copy a:hover { color: var(--primary); }
    .footer-links { display: flex; gap: 24px; }
    .footer-links a { font-size: 1.3rem; color: var(--text-3); }
    .footer-links a:hover { color: var(--primary); }
    .footer-back-top { display: flex; align-items: center; gap: 6px; font-size: 1.3rem; color: var(--text-3); cursor: pointer; transition: color .15s ease; }
    .footer-back-top:hover { color: var(--primary); }
    .footer-back-top svg { width: 14px; height: 14px; }

    /* 响应式 */
    @media (max-width: 900px) {
      .cat-tags { grid-template-columns: repeat(6, 1fr); }
    }
    @media (max-width: 768px) {
      .navbar-inner { padding: 0 16px; height: 60px; gap: 12px; }
      .logo-desc { display: none; }
      .search-wrap { max-width: none; }
      .search-box button span { display: none; }
      .nav-actions { display: none; }
      .page-header { padding: 0 16px; }
      .page-header-inner { padding: 32px 0; }
      .page-header h1 { font-size: 2.4rem; }
      .main { padding: 32px 16px 48px; }
      .cat-tags { grid-template-columns: repeat(4, 1fr); gap: 8px; }
      .cat-tag { padding: 8px 6px; font-size: 1.2rem; }
      .footer { padding: 24px 16px; }
      .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
      .footer-links { flex-wrap: wrap; justify-content: center; gap: 16px; }
    }