:root{--bg: #0f1117;--bg-elevated: #171a23;--bg-card: #1c2029;--border: #2a2f3a;--text: #e6e8ee;--text-muted: #9aa1b1;--primary: #6366f1;--primary-hover: #4f46e5;--accent: #22d3ee;--danger: #ef4444;--success: #22c55e;--topbar-bg: rgba(15, 17, 23, .85);--scrollbar: #2f3542;--scrollbar-hover: #3b424f;--radius: 10px;--sidebar-w: 260px;--header-h: 60px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;--mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace}:root[data-theme=light]{--bg: #f5f6f8;--bg-elevated: #ffffff;--bg-card: #ffffff;--border: #e3e6ec;--text: #1f2430;--text-muted: #6b7280;--primary: #4f46e5;--primary-hover: #4338ca;--accent: #0891b2;--danger: #dc2626;--success: #16a34a;--topbar-bg: rgba(255, 255, 255, .85);--scrollbar: #cbd0da;--scrollbar-hover: #b3bac7}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased;transition:background .25s ease,color .25s ease}a{color:inherit;text-decoration:none}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--scrollbar);border-radius:6px}::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-hover)}.app{display:flex;min-height:100%}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--bg-elevated);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;bottom:0;left:0;overflow-y:auto;transition:transform .25s ease;z-index:50}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:18px 20px;font-size:17px;font-weight:700;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--bg-elevated)}.sidebar-brand .logo{width:30px;height:30px}.sidebar-search{padding:14px 16px 6px}.sidebar-search input{width:100%;padding:9px 12px;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:13px}.sidebar-search input:focus{outline:none;border-color:var(--primary)}.nav-group{padding:8px 12px}.nav-group-title{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);padding:10px 10px 6px}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;color:var(--text-muted);font-size:13.5px;cursor:pointer;transition:background .15s,color .15s}.nav-item:hover{background:var(--bg-card);color:var(--text)}.nav-item.active{background:var(--primary);color:#fff}.nav-item .icon{font-size:16px;width:20px;text-align:center}.main{flex:1;margin-left:var(--sidebar-w);min-width:0;display:flex;flex-direction:column}.topbar{height:var(--header-h);display:flex;align-items:center;gap:14px;padding:0 24px;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--topbar-bg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:20}.theme-toggle{margin-left:auto;background:var(--bg-card);border:1px solid var(--border);color:var(--text);border-radius:8px;width:38px;height:38px;font-size:17px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:background .15s,border-color .15s}.theme-toggle:hover{border-color:var(--primary)}.hamburger{display:none;background:none;border:none;color:var(--text);font-size:22px;cursor:pointer}.topbar-title{font-size:15px;font-weight:600}.content{padding:28px 32px 60px;max-width:1000px;width:100%}.site-footer{margin-top:44px;padding-top:22px;border-top:1px solid var(--border);text-align:center;color:var(--text-muted);font-size:12.5px;line-height:1.9}.site-footer-line{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:6px}.beian-link{display:inline-flex;align-items:center;gap:5px;color:var(--text-muted);white-space:nowrap;transition:color .15s ease}.beian-link:hover{color:var(--primary);text-decoration:underline}.beian-icon{width:14px;height:14px}.tool-info{margin-top:6px}.info-title{font-size:16px;font-weight:600;margin:0 0 10px}.tool-intro{margin:0;color:var(--text-muted);line-height:1.9}.faq-item{border-top:1px solid var(--border);padding:10px 0}.faq-item summary{cursor:pointer;font-weight:600;color:var(--text)}.faq-item p{margin:8px 0 0;color:var(--text-muted);line-height:1.9}.related-links{display:flex;flex-wrap:wrap;gap:8px}.related-link{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text);font-size:13px;transition:border-color .15s ease,color .15s ease}.related-link:hover{border-color:var(--primary);color:var(--primary)}.table-wrap{margin-top:4px;overflow-x:auto}.data-table{width:100%;border-collapse:collapse;font-size:13px}.data-table th,.data-table td{border:1px solid var(--border);padding:9px 12px;text-align:left;color:var(--text);line-height:1.6}.data-table th{background:var(--bg);font-weight:600;white-space:nowrap}.data-table td:first-child{font-weight:600;white-space:nowrap}.data-table tbody tr:hover td{background:var(--bg)}.preset-banner{margin-bottom:16px;padding:10px 14px;border:1px solid var(--primary);border-radius:8px;background:rgba(99,102,241,.08);color:var(--primary);font-size:13px;line-height:1.7}.sym-group{margin-bottom:20px}.sym-group-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}.sym-group-title{font-weight:600}.sym-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(44px,1fr));gap:6px}.sym-grid.wide{grid-template-columns:repeat(auto-fill,minmax(120px,1fr))}.sym-cell{height:44px;display:flex;align-items:center;justify-content:center;font-size:18px;line-height:1;padding:0 4px;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text);cursor:pointer;overflow:hidden;white-space:nowrap;transition:border-color .15s ease,background .15s ease}.sym-grid.wide .sym-cell{font-size:13px}.sym-cell:hover{border-color:var(--primary);background:var(--bg-elevated)}.sym-cell.copied{border-color:var(--success);color:var(--success)}.tile-grid{display:grid;gap:8px}.tile-card{position:relative;cursor:pointer;border:1px solid var(--border);border-radius:8px;overflow:hidden;background:var(--bg)}.tile-card:hover{border-color:var(--primary)}.tile-card img{display:block;width:100%}.tile-label{position:absolute;right:4px;bottom:4px;font-size:11px;padding:1px 5px;border-radius:4px;background:rgba(0,0,0,.55);color:#fff}.prerender{padding:28px 32px 60px;max-width:1000px}.prerender-list{margin:0 0 18px;padding-left:20px;color:var(--text-muted);line-height:2}.prerender-list a{color:var(--text)}.tool-header{margin-bottom:22px}.tool-header h1{font-size:22px;margin:0 0 6px;display:flex;align-items:center;gap:10px}.tool-header p{margin:0;color:var(--text-muted)}.panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;margin-bottom:18px}.field{margin-bottom:16px}.field:last-child{margin-bottom:0}.field label{display:block;font-size:13px;color:var(--text-muted);margin-bottom:6px}textarea,input[type=text],input[type=number],select{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:14px;padding:10px 12px;font-family:var(--font)}textarea{font-family:var(--mono);resize:vertical;min-height:140px;line-height:1.5}textarea:focus,input:focus,select:focus{outline:none;border-color:var(--primary)}.toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:14px}button.btn{background:var(--primary);color:#fff;border:none;border-radius:8px;padding:9px 16px;font-size:13.5px;font-weight:500;cursor:pointer;transition:background .15s,opacity .15s}button.btn:hover{background:var(--primary-hover)}button.btn.ghost{background:transparent;border:1px solid var(--border);color:var(--text)}button.btn.ghost:hover{background:var(--bg-elevated)}button.btn:disabled{opacity:.5;cursor:not-allowed}.error-msg{color:var(--danger);font-size:13px;margin-top:6px;white-space:pre-wrap}.hint{color:var(--text-muted);font-size:12.5px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:12px}.stat-card{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:14px;text-align:center}.stat-card .num{font-size:24px;font-weight:700;color:var(--accent)}.stat-card .lbl{font-size:12px;color:var(--text-muted);margin-top:4px}.result-row{display:flex;align-items:center;gap:10px;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:10px 12px;margin-bottom:8px;font-family:var(--mono);font-size:13px;word-break:break-all}.result-row .tag{flex-shrink:0;color:var(--text-muted);font-family:var(--font);width:70px}.result-row .val{flex:1;min-width:0}.copy-btn{flex-shrink:0;background:var(--bg-elevated);border:1px solid var(--border);color:var(--text-muted);border-radius:6px;padding:4px 10px;font-size:12px;cursor:pointer}.copy-btn:hover{color:var(--text);border-color:var(--primary)}.home-hero{margin-bottom:28px}.home-hero h1{font-size:28px;margin:0 0 8px}.home-hero p{color:var(--text-muted);margin:0}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}.tool-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;cursor:pointer;transition:transform .15s,border-color .15s}.tool-card:hover{transform:translateY(-2px);border-color:var(--primary)}.tool-card .icon{font-size:26px}.tool-card h3{margin:10px 0 4px;font-size:15px}.tool-card p{margin:0;font-size:12.5px;color:var(--text-muted)}.qr-preview{display:flex;justify-content:center;padding:16px;background:#fff;border-radius:8px;width:fit-content}.color-preview{height:90px;border-radius:8px;border:1px solid var(--border);margin-bottom:14px}.row-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}.diff-line{font-family:var(--mono);font-size:13px;padding:1px 8px;white-space:pre-wrap;word-break:break-all}.diff-line.add{background:rgba(34,197,94,.15)}.diff-line.del{background:rgba(239,68,68,.15)}.mask{display:none}@media (max-width: 860px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main{margin-left:0}.hamburger{display:block}.mask.open{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.5);z-index:40}.content{padding:20px 16px 50px}.row-2{grid-template-columns:1fr}}