:root { --primary: rgb(26,115,232); --bg-body: #f4f7fe; --text-main: #334155; --border: #e2e8f0; }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: -apple-system, sans-serif; background: var(--bg-body); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: 0.3s; }
        ul { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

        .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(--primary); white-space: nowrap; }

        .header { background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 100; }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .desktop-nav { display: flex; gap: 28px; align-items: center; }
        .desktop-nav a:hover { color: var(--primary); }
        .mobile-btn { display: none; cursor: pointer; color: #333; }

        .drawer-mask { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 998; opacity: 0; visibility: hidden; transition: 0.3s; }
        .drawer-mask.active { opacity: 1; visibility: visible; }
        .drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100%; background: #fff; z-index: 999; transition: 0.3s; display: flex; flex-direction: column; }
        .drawer.active { left: 0; }
        .drawer-header { padding: 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; }
        .drawer-nav { padding: 20px; display: flex; flex-direction: column; gap: 4px; }
        .drawer-nav a { padding: 12px 0; border-bottom: 1px dashed var(--border); }

        .page-header { background: #fff; padding: 50px 0; border-bottom: 1px solid var(--border); text-align: center; margin-bottom: 40px; }
        .page-title { font-size: 32px; font-weight: 700; color: #0f172a; margin-bottom: 15px; }
        .page-desc { color: #64748b; font-size: 16px; max-width: 600px; margin: 0 auto; }

        .tag-cloud-box { background: #fff; padding: 40px; border-radius: 16px; box-shadow: 0 4px 15px rgba(0,0,0,0.02); margin-bottom: 60px; }
        .tag-list { display: flex; flex-wrap: wrap; gap: 15px; justify-content: center; }
        .tag-item { display: inline-flex; align-items: center; padding: 10px 20px; background: var(--bg-body); border-radius: 30px; font-size: 15px; color: #475569; transition: 0.3s; border: 1px solid transparent; }
        .tag-item:hover { background: var(--primary); color: #fff; transform: translateY(-3px); box-shadow: 0 6px 12px rgba(26,115,232,0.2); }
        .tag-count { margin-left: 8px; background: rgba(0,0,0,0.06); padding: 2px 8px; border-radius: 12px; font-size: 12px; }
        .tag-item:hover .tag-count { background: rgba(255,255,255,0.2); }

        .footer { background: #0f172a; color: #94a3b8; padding: 70px 0 20px; }
        .footer .logo span { color: #fff; }
        .footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 50px; }
        .footer-col h3 { color: #fff; font-size: 16px; margin-bottom: 25px; }
        .footer-col ul { display: flex; flex-direction: column; gap: 12px; }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 25px; text-align: center; font-size: 14px; }

        @media(max-width: 768px) { .desktop-nav { display: none; } .mobile-btn { display: block; } .footer-inner { grid-template-columns: 1fr; } .tag-cloud-box { padding: 25px; } }