:root{--primary: #4F46E5;--primary-hover: #4338CA;--bg: #F9FAFB;--surface: #FFFFFF;--text: #111827;--text-secondary: #6B7280;--border: #E5E7EB;--success: #10B981;--radius: 8px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-hover)}.container{max-width:1200px;margin:0 auto;padding:0 20px}.header{background:var(--surface);border-bottom:1px solid var(--border);padding:16px 0;position:sticky;top:0;z-index:100}.header .container{display:flex;align-items:center;justify-content:space-between}.logo{font-size:24px;font-weight:800;color:var(--primary);display:flex;align-items:center;gap:8px}.logo span{color:var(--text-secondary);font-weight:400;font-size:14px}nav{display:flex;gap:24px;align-items:center}nav a{color:var(--text-secondary);font-size:14px;font-weight:500;transition:color .2s}nav a:hover{color:var(--primary)}.hero{text-align:center;padding:60px 0 40px}.hero h1{font-size:40px;font-weight:800;margin-bottom:16px;background:linear-gradient(135deg,#4f46e5,#7c3aed);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero p{font-size:18px;color:var(--text-secondary);max-width:600px;margin:0 auto}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;padding:40px 0}.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:all .2s;display:flex;flex-direction:column}.tool-card:hover{border-color:var(--primary);box-shadow:0 4px 12px #4f46e51a;transform:translateY(-2px)}.tool-card .icon{width:48px;height:48px;border-radius:12px;background:#eef2ff;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}.tool-card h3{font-size:18px;font-weight:700;margin-bottom:8px}.tool-card p{font-size:14px;color:var(--text-secondary);flex:1}.tool-card .tag{display:inline-block;font-size:12px;color:var(--primary);background:#eef2ff;padding:2px 8px;border-radius:4px;margin-top:12px}.tool-page{padding:40px 0}.tool-page h1{font-size:32px;font-weight:800;margin-bottom:8px}.tool-page .subtitle{color:var(--text-secondary);margin-bottom:32px;font-size:16px}.tool-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px;margin-bottom:40px}.form-group{margin-bottom:20px}.form-group label{display:block;font-weight:600;margin-bottom:6px;font-size:14px}.form-group input,.form-group textarea,.form-group select{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;transition:border-color .2s;font-family:inherit}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:var(--radius);font-size:14px;font-weight:600;cursor:pointer;border:none;transition:all .2s}.btn-primary{background:var(--primary);color:#fff;border:1px solid var(--primary)}.btn-primary:hover{background:var(--primary-hover)}.btn-secondary{background:var(--bg);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:var(--border)}.output-box{background:#1e1e2e;color:#cdd6f4;border-radius:var(--radius);padding:20px;font-family:Courier New,monospace;font-size:13px;line-height:1.6;overflow-x:auto;position:relative;margin-top:20px;white-space:pre-wrap;word-break:break-all}.copy-btn{position:absolute;top:10px;right:10px;background:#ffffff1a;color:#cdd6f4;border:none;padding:6px 12px;border-radius:4px;font-size:12px;cursor:pointer}.copy-btn:hover{background:#fff3}.faq{margin-top:40px}.faq h2{font-size:24px;margin-bottom:20px}.faq-item{border-bottom:1px solid var(--border);padding:16px 0}.faq-item h3{font-size:16px;font-weight:600;margin-bottom:8px}.faq-item p{font-size:14px;color:var(--text-secondary)}.content-section{margin-top:40px;padding:32px 0;border-top:1px solid var(--border)}.content-section h2{font-size:24px;margin-bottom:16px}.content-section p{color:var(--text-secondary);margin-bottom:12px;font-size:15px}.footer{border-top:1px solid var(--border);padding:32px 0;margin-top:60px;text-align:center;color:var(--text-secondary);font-size:14px}.footer a{color:var(--text-secondary)}.footer a:hover{color:var(--primary)}@media(max-width:768px){.hero h1{font-size:28px}.hero p{font-size:16px}nav{gap:16px}.tool-page h1{font-size:24px}}