.builtin-page{max-width:900px;margin:0 auto;padding:24px;min-height:calc(100vh - 60px)}.tool-page__back{display:flex;align-items:center;gap:8px;color:var(--text-secondary);font-size:14px;cursor:pointer;margin-bottom:20px;transition:color .2s}.tool-page__back:hover{color:var(--text-primary)}.tool-intro{text-align:center;margin-bottom:32px}.tool-intro h1{font-size:28px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.tool-intro p{font-size:14px;color:var(--text-secondary)}.builtin-page__categories{display:flex;flex-direction:column;gap:24px}.builtin-page__category{animation:fadeInUp .5s ease-out forwards}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.builtin-page__category-header{display:flex;align-items:center;gap:12px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border-subtle)}.builtin-page__category-icon{font-size:24px}.builtin-page__category-name{font-size:18px;font-weight:600;color:var(--text-primary)}.builtin-page__category-count{font-size:12px;color:var(--text-secondary);background:var(--bg-secondary);padding:4px 12px;border-radius:12px}.builtin-page__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}.builtin-page__tool-card{background:var(--bg-card);border-radius:12px;padding:16px;display:flex;flex-direction:column;align-items:center;gap:8px;cursor:pointer;transition:all .2s ease;box-shadow:var(--shadow-card);position:relative}.builtin-page__tool-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}.builtin-page__tool-badges{position:absolute;top:8px;right:8px;display:flex;gap:4px}.builtin-page__tool-badge{font-size:10px;padding:2px 6px;background:var(--bg-secondary);border-radius:4px;color:var(--text-secondary)}.builtin-page__tool-icon{font-size:32px;margin-bottom:4px}.builtin-page__tool-name{font-size:14px;font-weight:500;color:var(--text-primary);text-align:center}.builtin-page__tool-desc{font-size:12px;color:var(--text-secondary);text-align:center;line-height:1.4}.builtin-page__tool-links{display:flex;gap:8px;width:100%;margin-top:8px}.builtin-page__tool-link{flex:1;display:flex;align-items:center;justify-content:center;gap:4px;padding:8px 12px;border-radius:8px;font-size:12px;text-decoration:none;transition:all .2s}.builtin-page__tool-link--primary{background:var(--accent-red);color:#fff}.builtin-page__tool-link--primary:hover{background:var(--accent-red);opacity:.9}.builtin-page__tool-link--mirror{background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border-subtle)}.builtin-page__tool-link--mirror:hover{background:var(--bg-hover)}[data-theme=dark] .builtin-page{background:#1a1a1e;color:#e5e5e7}[data-theme=dark] .builtin-page__tool-card{background:#2c2c2e;box-shadow:0 2px 8px #0000004d}[data-theme=dark] .builtin-page__tool-card:hover{box-shadow:0 4px 16px #0006}[data-theme=dark] .builtin-page__category-header{border-bottom-color:#ffffff1a}[data-theme=dark] .builtin-page__tool-link--mirror{background:#3a3a3c;border-color:#ffffff1a}[data-theme=dark] .builtin-page__tool-link--mirror:hover{background:#4a4a4c}