:root {
      --color-primary: #1D7BFF;
      --color-glacier: #38bdf8;
      --color-silver: #f8fafc;
      --color-ink: #0a1128;
      --color-dark-slate: rgb(68,71,90);
      --color-text-bright: #ffffff;
      --color-text-muted: #94a3b8;
      --color-border: rgba(255, 255, 255, 0.08);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: var(--font-sans);
      background-color: var(--color-ink);
      color: var(--color-text-muted);
      line-height: 1.6;
    }
    a { color: inherit; text-decoration: none; transition: all 0.3s; }
    
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(10, 17, 40, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--color-border);
    }
    .nav-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      height: 70px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .logo img {
      display: block;
      height: 36px;
      width: auto;
      max-width: 160px;
      object-fit: contain;
      flex-shrink: 0;
    }
    .logo span {
      display: inline-block;
      font-size: 20px;
      font-weight: 800;
      line-height: 1;
      color: var(--color-text-bright);
      white-space: nowrap;
      background: linear-gradient(135deg, var(--color-silver), var(--color-glacier));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-menu { display: flex; gap: 30px; }
    .nav-menu a { font-size: 15px; color: var(--color-text-muted); font-weight: 500; }
    .nav-menu a:hover { color: var(--color-primary); }
    .nav-actions { display: flex; align-items: center; gap: 15px; }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--color-primary), var(--color-glacier));
      color: #fff;
      box-shadow: 0 4px 15px rgba(29, 123, 255, 0.4);
    }
    .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      color: var(--color-text-bright);
      border: 1px solid var(--color-border);
    }
    .menu-toggle { display: none; background: none; border: none; color: var(--color-text-bright); font-size: 24px; cursor: pointer; }

    
    .mobile-drawer {
      position: fixed;
      top: 0;
      left: -100%;
      width: 280px;
      height: 100%;
      background: var(--color-ink);
      border-right: 1px solid var(--color-border);
      z-index: 200;
      padding: 30px 20px;
      transition: all 0.4s ease;
      display: flex;
      flex-direction: column;
      gap: 30px;
    }
    .mobile-drawer.active { left: 0; }
    .drawer-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.7);
      z-index: 199;
      display: none;
    }
    .drawer-overlay.active { display: block; }
    .drawer-header { display: flex; align-items: center; justify-content: space-between; }
    .drawer-close { background: none; border: none; color: var(--color-text-bright); font-size: 24px; cursor: pointer; }
    .drawer-menu { display: flex; flex-direction: column; gap: 20px; }
    .drawer-menu a { font-size: 16px; color: var(--color-text-muted); font-weight: 500; }

    
    .tag-hero {
      padding: 140px 20px 60px;
      background: radial-gradient(circle at 50% 100%, rgba(29, 123, 255, 0.1), transparent 70%);
      border-bottom: 1px solid var(--color-border);
      text-align: center;
    }
    .tag-hero-title { font-size: 38px; color: var(--color-text-bright); font-weight: 800; margin-bottom: 15px; }

    
    .tag-index-main { max-width: 1000px; margin: 60px auto 100px; padding: 0 20px; }
    .tag-grid-box {
      background: rgba(68,71,90, 0.1);
      border: 1px solid var(--color-border);
      border-radius: 16px;
      padding: 40px;
    }
    .tag-intro-para { font-size: 16px; line-height: 1.8; margin-bottom: 40px; border-bottom: 1px solid var(--color-border); padding-bottom: 25px; }
    
    .tags-cloud-wrapper { display: flex; flex-wrap: wrap; gap: 15px; justify-content: center; }
    .heavy-tag-item {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 20px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--color-border);
      border-radius: 100px;
      font-size: 15px;
      color: var(--color-text-muted);
      transition: all 0.3s;
    }
    .heavy-tag-item:hover {
      transform: translateY(-2px);
      border-color: var(--color-primary);
      color: var(--color-text-bright);
      background: rgba(29, 123, 255, 0.1);
      box-shadow: 0 5px 15px rgba(29, 123, 255, 0.2);
    }
    .heavy-tag-count {
      font-size: 11px;
      background: rgba(255,255,255,0.08);
      color: var(--color-glacier);
      padding: 2px 6px;
      border-radius: 20px;
    }

    
    .footer { background: #050814; border-top: 1px solid var(--color-border); padding: 80px 20px 40px; }
    .footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 40px; margin-bottom: 60px; }
    .footer-brand { display: flex; flex-direction: column; gap: 20px; }
    .footer-desc { font-size: 14px; }
    .footer-links-title { font-size: 16px; color: var(--color-text-bright); margin-bottom: 20px; font-weight: 600; }
    .footer-links { display: flex; flex-direction: column; gap: 12px; font-size: 14px; }
    .footer-bottom { border-top: 1px solid var(--color-border); padding-top: 30px; display: flex; justify-content: space-between; align-items: center; font-size: 13px; }

    @media (max-width: 992px) {
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .menu-toggle { display: block; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 15px; text-align: center; }
    }