:root {
      --primary-color: rgb(79,70,229);
      --primary-hover: #4338ca;
      --silver-white: #F8FAFC;
      --deep-ink: #0F172A;
      --slate-grey: #64748B;
      --border-color: #E2E8F0;
      --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05);
      --text-dark: #0F172A;
      --text-light: #64748B;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--silver-white);
      color: var(--text-dark);
      line-height: 1.6;
    }
    a { text-decoration: none; color: inherit; transition: all 0.3s ease; }

    
    .header {
      position: fixed; top: 0; left: 0; width: 100%; height: 70px;
      background: rgba(255, 255, 255, 0.85); backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      z-index: 1000; display: flex; align-items: center; justify-content: space-between; padding: 0 4%;
    }
    .logo { display: inline-flex; align-items: center; gap: 12px; }
    .logo img { display: block; height: 38px; width: auto; max-width: 160px; object-fit: contain; }
    .logo span { display: inline-block; font-size: 18px; font-weight: 800; color: var(--deep-ink); }
    .nav-list { display: flex; align-items: center; gap: 28px; list-style: none; }
    .nav-list a { font-size: 15px; font-weight: 500; color: var(--text-light); }
    .nav-list a:hover { color: var(--primary-color); }
    .nav-btn { background-color: var(--primary-color); color: #fff !important; padding: 8px 20px; border-radius: 50px; font-size: 14px !important; font-weight: 600 !important; }
    .nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
    .nav-toggle span { display: block; width: 24px; height: 2px; background-color: var(--deep-ink); margin: 5px 0; }

    
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(15, 23, 42, 0.6); backdrop-filter: blur(4px); z-index: 1001; opacity: 0; visibility: hidden; transition: 0.3s; }
    .drawer-overlay.active { opacity: 1; visibility: visible; }
    .drawer { position: fixed; top: 0; left: -320px; width: 300px; height: 100%; background: #fff; z-index: 1002; box-shadow: 10px 0 30px rgba(0,0,0,0.1); transition: 0.3s; display: flex; flex-direction: column; padding: 24px; }
    .drawer.active { left: 0; }
    .drawer-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 40px; }
    .drawer-close { background: none; border: none; font-size: 24px; color: var(--text-light); cursor: pointer; }
    .drawer-nav { display: flex; flex-direction: column; gap: 20px; }
    .drawer-nav a { font-size: 16px; font-weight: 500; color: var(--text-dark); padding: 8px 0; border-bottom: 1px solid var(--border-color); }

    
    .page-nav { padding: 100px 4% 20px; background: #fff; }
    .nav-inner { max-width: 900px; margin: 0 auto; font-size: 14px; color: var(--slate-grey); }
    .nav-inner a:hover { color: var(--primary-color); }

    
    .article-container { max-width: 900px; margin: 0 auto 80px; padding: 0 4%; }
    .article-header-box { background: #fff; padding: 40px; border-radius: 16px 16px 0 0; border: 1px solid var(--border-color); border-bottom: none; }
    .article-detail-title { font-size: 32px; font-weight: 800; color: var(--deep-ink); line-height: 1.3; margin-bottom: 24px; }
    .article-detail-meta { display: flex; flex-wrap: wrap; gap: 24px; font-size: 14px; color: var(--slate-grey); border-top: 1px solid var(--border-color); padding-top: 20px; }
    .meta-item { display: inline-flex; align-items: center; gap: 6px; }

    
    .article-hero-img { width: 100%; max-height: 450px; overflow: hidden; border-left: 1px solid var(--border-color); border-right: 1px solid var(--border-color); }
    .article-hero-img img { width: 100%; height: 100%; object-fit: cover; }

    
    .article-content-body { background: #fff; padding: 40px; border-radius: 0 0 16px 16px; border: 1px solid var(--border-color); border-top: none; font-size: 16px; color: #334155; line-height: 1.8; }
    .article-content-body p { margin-bottom: 24px; }
    .article-content-body h2 { font-size: 22px; font-weight: 700; color: var(--deep-ink); margin: 36px 0 16px; }
    .article-content-body h3 { font-size: 18px; font-weight: 700; color: var(--deep-ink); margin: 28px 0 12px; }
    .article-content-body img { max-width: 100%; height: auto; border-radius: 8px; margin: 24px 0; }
    .article-content-body blockquote { border-left: 4px solid var(--primary-color); background: var(--silver-white); padding: 16px 24px; margin: 24px 0; border-radius: 0 8px 8px 0; font-style: italic; color: var(--slate-grey); }

    
    .article-body-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 40px; border-top: 1px solid var(--border-color); padding-top: 24px; }
    .body-tag-link { background: var(--silver-white); border: 1px solid var(--border-color); padding: 6px 14px; border-radius: 50px; font-size: 13px; color: var(--slate-grey); }
    .body-tag-link:hover { border-color: var(--primary-color); color: var(--primary-color); }

    
    .post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 40px; }
    .post-nav-card { background: #fff; border: 1px solid var(--border-color); border-radius: 12px; padding: 20px; transition: 0.3s; }
    .post-nav-card:hover { transform: translateY(-2px); border-color: var(--primary-color); }
    .post-nav-label { font-size: 12px; color: var(--slate-grey); text-transform: uppercase; margin-bottom: 6px; }
    .post-nav-title { font-size: 15px; font-weight: 700; color: var(--deep-ink); display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }

    
    .relate-section { max-width: 900px; margin: 60px auto 0; padding: 0 4%; }
    .relate-title { font-size: 20px; font-weight: 700; color: var(--deep-ink); margin-bottom: 24px; }
    .relate-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .relate-card { background: #fff; border-radius: 12px; border: 1px solid var(--border-color); padding: 20px; display: flex; flex-direction: column; }
    .relate-card h4 { font-size: 15px; font-weight: 700; color: var(--deep-ink); line-height: 1.4; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .relate-card p { font-size: 12px; color: var(--slate-grey); margin-top: auto; }

    
    .footer { background: var(--deep-ink); color: #fff; padding: 80px 4% 40px; margin-top: 100px;}
    .footer-grid { max-width: 1200px; margin: 0 auto 60px; display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; }
    .footer-brand .logo span { color: #fff; }
    .footer-brand p { color: var(--slate-grey); font-size: 14px; margin-top: 20px; }
    .footer-links h5 { font-size: 16px; font-weight: 700; margin-bottom: 24px; }
    .footer-links ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
    .footer-links a { color: var(--slate-grey); font-size: 14px; }
    .footer-links a:hover { color: #fff; }
    .footer-contact p { color: var(--slate-grey); font-size: 14px; margin-bottom: 12px; }
    .footer-bottom { max-width: 1200px; margin: 0 auto; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 30px; display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: var(--slate-grey); }

    @media(max-width: 768px) {
      .header { padding: 0 6%; }
      .nav-list { display: none; }
      .nav-toggle { display: block; }
      .article-header-box { padding: 24px; }
      .article-content-body { padding: 24px; }
      .article-detail-title { font-size: 24px; }
      .post-nav { grid-template-columns: 1fr; }
      .relate-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    }