:root{
  --bg:#0a0e1a;--bg2:#0f1525;--card:#151c2e;--card-hover:#1a2338;
  --border:#1e2840;--text:#e4e8f0;--text2:#8892b0;--text3:#5a6478;
  --accent:#00d4ff;--accent2:#7b61ff;--accent3:#ff6b9d;
  --gradient:linear-gradient(135deg,#00d4ff 0%,#7b61ff 50%,#ff6b9d 100%);
  --gradient2:linear-gradient(135deg,#00d4ff,#7b61ff);
  --radius:16px;--shadow:0 4px 20px rgba(0,0,0,0.3);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Noto Sans SC',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button{cursor:pointer;font-family:inherit;border:none;background:none;color:inherit}
input,textarea,select{font-family:inherit}

/* Header */
.header{position:sticky;top:0;z-index:100;background:rgba(10,14,26,0.85);backdrop-filter:blur(20px);border-bottom:1px solid var(--border)}
.header-inner{max-width:1280px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:14px 24px;gap:16px}
.logo{display:flex;align-items:center;gap:6px;font-size:20px;font-weight:800;flex-shrink:0}
.logo-icon{font-size:24px}
.logo-sub{background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.search-box-h{flex:1;max-width:400px}
.search-box-h input{width:100%;padding:8px 16px;background:var(--card);border:1px solid var(--border);border-radius:20px;color:var(--text);font-size:14px;outline:none}
.search-box-h input:focus{border-color:var(--accent)}
.header-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}
.btn-link{padding:6px 14px;border:1px solid var(--border);border-radius:18px;font-size:13px;color:var(--text2);transition:all .2s}
.btn-link:hover{border-color:var(--accent);color:var(--accent)}
.btn-admin{padding:6px 14px;border:1px solid var(--border);border-radius:18px;font-size:13px;color:var(--text2);transition:all .2s}
.btn-admin:hover{border-color:var(--accent2);color:var(--accent2)}

/* Hero */
.hero{position:relative;padding:60px 24px 40px;text-align:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.25;animation:float 8s ease-in-out infinite}
.orb1{width:400px;height:400px;background:#00d4ff;top:-100px;left:-100px}
.orb2{width:350px;height:350px;background:#7b61ff;top:50px;right:-80px;animation-delay:2s}
@keyframes float{0%,100%{transform:translate(0,0)}50%{transform:translate(30px,-30px)}}
.hero-content{position:relative;z-index:1;max-width:700px;margin:0 auto}
.hero-title{font-size:44px;font-weight:800;letter-spacing:-2px;margin-bottom:12px}
.gradient-text{background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:inline-block}
.hero-sub{font-size:16px;color:var(--text2);margin-bottom:28px}
.search-box{max-width:500px;margin:0 auto}
.search-box input{width:100%;padding:14px 24px;background:var(--card);border:1px solid var(--border);border-radius:28px;color:var(--text);font-size:16px;outline:none;transition:all .3s}
.search-box input:focus{border-color:var(--accent);box-shadow:0 0 0 4px rgba(0,212,255,0.1)}

/* Tools Section */
.tools-section{max-width:1280px;margin:0 auto;padding:20px 24px 60px}
.cat-section{margin-bottom:40px}
.cat-header{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.cat-icon{font-size:24px}
.cat-name{font-size:22px;font-weight:700}
.cat-name-en{font-size:14px;color:var(--text3)}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.tool-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:all .3s;display:flex;align-items:flex-start;gap:12px}
.tool-card:hover{background:var(--card-hover);border-color:var(--accent);transform:translateY(-3px);box-shadow:0 8px 30px rgba(0,212,255,0.1)}
.tool-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0;background:var(--bg2);border:1px solid var(--border)}
.tool-info{flex:1;min-width:0}
.tool-name{font-size:15px;font-weight:600;margin-bottom:2px}
.tool-desc{font-size:13px;color:var(--text3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hot-badge{font-size:10px;font-weight:600;padding:2px 7px;border-radius:8px;background:rgba(255,107,157,.15);color:var(--accent3);flex-shrink:0}
.no-result{text-align:center;padding:60px;color:var(--text3)}

/* Tool Page */
.tool-page{max-width:900px;margin:0 auto;padding:24px}
.tool-header{display:flex;align-items:center;gap:12px;margin-bottom:24px}
.tool-header h1{font-size:28px;font-weight:800}
.tool-header .icon{font-size:32px}
.tool-desc-full{color:var(--text2);margin-bottom:24px;font-size:15px}
.tool-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:20px}
.tool-row{display:flex;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.tool-input{flex:1;min-width:200px;width:100%;box-sizing:border-box;padding:10px 14px;background:var(--bg2);border:1px solid var(--border);border-radius:10px;color:var(--text);font-size:14px;outline:none}
.tool-input:focus{border-color:var(--accent)}
textarea.tool-input{min-height:120px;resize:vertical;font-family:'Consolas','Monaco',monospace}
.tool-btn{padding:10px 20px;border-radius:10px;font-size:14px;font-weight:600;transition:all .2s}
.btn-primary{background:var(--gradient2);color:#fff}
.btn-primary:hover{opacity:.9}
.btn-secondary{background:var(--bg2);border:1px solid var(--border);color:var(--text2)}
.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}
.tool-label{display:block;margin-bottom:6px;font-size:13px;color:var(--text2);font-weight:500}
.tool-result{background:var(--bg2);border:1px solid var(--border);border-radius:10px;padding:14px;min-height:120px;font-family:'Consolas','Monaco',monospace;font-size:14px;white-space:pre-wrap;word-break:break-all;max-height:400px;overflow-y:auto}
.tool-output{margin-top:16px}
.tool-options{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:16px}
.tool-option{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--text2)}
.tool-option input,.tool-option select{padding:6px 10px;background:var(--bg2);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:13px;outline:none}
.color-preview{width:60px;height:60px;border-radius:10px;border:1px solid var(--border);display:inline-block;vertical-align:middle}
.qr-container{display:flex;justify-content:center;padding:20px}
.qr-container canvas{border-radius:8px}
.copy-btn{font-size:12px;padding:4px 12px;border-radius:6px;background:var(--bg2);border:1px solid var(--border);color:var(--text3);margin-left:8px}
.copy-btn:hover{color:var(--accent);border-color:var(--accent)}
.error-msg{color:var(--accent3);font-size:14px;margin-top:8px}
.success-msg{color:#10b981;font-size:14px;margin-top:8px}

/* Footer */
.footer{border-top:1px solid var(--border);padding:24px}
.footer-inner{max-width:1280px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-left{display:flex;align-items:center;gap:6px;font-weight:600}
.footer-right{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text3)}
.footer-right a{color:var(--text3);transition:color .2s}
.footer-right a:hover{color:var(--accent)}
.footer-sep{color:var(--border)}

/* Responsive */
@media(max-width:768px){
  .hero-title{font-size:32px}
  .search-box-h{display:none}
  .tool-grid{grid-template-columns:1fr}
  .header-inner{padding:12px 16px}
  .tools-section{padding:16px}
  .tool-page{padding:16px}
}