*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color:#333;background:#f5f5f5;line-height:1.6}
.container{max-width:900px;margin:0 auto;padding:0 15px}
header{background:#0d9488;color:#fff;padding:12px 0}
.logo{color:#fff;text-decoration:none;font-size:1.3em;font-weight:700}
.ad-top,.ad-bottom{text-align:center;padding:10px;background:#fff;border-bottom:1px solid #eee}
main{padding:25px 0}
h1{font-size:1.8em;margin-bottom:20px;color:#0d9488}
h2{font-size:1.1em;margin:20px 0 10px;color:#555}
.site-desc{color:#666;margin-bottom:25px}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:15px}
.tool-card{background:#fff;border:1px solid #e0e0e0;border-radius:8px;padding:18px;text-decoration:none;color:#333;transition:.2s;display:block}
.tool-card:hover{border-color:#0d9488;box-shadow:0 2px 8px rgba(13,148,136,.15)}
.tool-title{font-weight:700;font-size:1em;margin-bottom:6px;color:#0d9488}
.tool-desc{font-size:.85em;color:#777}
.tool-box{background:#fff;border:1px solid #e0e0e0;border-radius:10px;padding:25px;margin-bottom:20px}
.input-group{display:flex;gap:10px;flex-wrap:wrap}
.input-group input{flex:1;min-width:200px;padding:10px 14px;border:1px solid #ccc;border-radius:6px;font-size:1em}
.input-group input:focus{outline:none;border-color:#0d9488}
button{background:#0d9488;color:#fff;border:none;padding:10px 24px;border-radius:6px;font-size:1em;cursor:pointer}
button:hover{background:#0a7970}
.result-box{background:#f9f9f9;border:1px solid #e0e0e0;border-radius:8px;padding:15px}
.result-table{width:100%;border-collapse:collapse}
.result-table th,.result-table td{padding:8px 12px;text-align:left;border-bottom:1px solid #eee}
.result-table th{width:120px;color:#555;font-weight:600;background:#f0f9f8}
.form-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:15px}
.form-grid label{display:flex;flex-direction:column;gap:6px;font-size:.9em;color:#555}
.form-grid input,.form-grid select{padding:8px 10px;border:1px solid #ccc;border-radius:6px;font-size:1em}
.batch-section{margin-top:25px}
.tool-intro{margin-top:25px;background:#fff;border-radius:8px;padding:20px;border:1px solid #e0e0e0}
footer{background:#333;color:#aaa;text-align:center;padding:15px 0;margin-top:30px;font-size:.85em}
@media(max-width:600px){.tool-grid{grid-template-columns:1fr 1fr}.input-group{flex-direction:column}}