:root{--bg: #f4f7fc;--bg-2: #eef2f9;--surface: #ffffff;--surface-2: #f8fafd;--ink: #16213a;--ink-2: #3a4a66;--muted: #6b7a93;--rule: #e3e9f2;--rule-2: #eef2f8;--accent: #2563eb;--accent-soft: rgba(37, 99, 235, .1);--accent-2: #06b6d4;--accent-2-soft: rgba(6, 182, 212, .1);--success: #16a34a;--warn: #f59e0b;--danger: #dc2626;--grad: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);--grad-soft: linear-gradient(135deg, rgba(37,99,235,.12), rgba(6,182,212,.12));--shadow-sm: 0 1px 3px rgba(22, 33, 58, .06), 0 1px 2px rgba(22, 33, 58, .04);--shadow: 0 4px 16px -4px rgba(22, 33, 58, .1), 0 2px 6px -2px rgba(22, 33, 58, .06);--shadow-lg: 0 12px 40px -12px rgba(37, 99, 235, .2), 0 4px 12px -4px rgba(22, 33, 58, .08);--radius-sm: 8px;--radius: 12px;--radius-lg: 16px;--radius-xl: 20px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;--font-mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;color-scheme:light}[data-theme=dark]{--bg: #0d1420;--bg-2: #0a1018;--surface: #161e2d;--surface-2: #1c2638;--ink: #e8eef7;--ink-2: #c2cde0;--muted: #8190a8;--rule: #283246;--rule-2: #1f2838;--accent: #5b8cff;--accent-soft: rgba(91, 140, 255, .14);--accent-2: #22d3ee;--accent-2-soft: rgba(34, 211, 238, .14);--success: #4ade80;--warn: #fbbf24;--danger: #f87171;--grad: linear-gradient(135deg, #5b8cff 0%, #22d3ee 100%);--grad-soft: linear-gradient(135deg, rgba(91,140,255,.16), rgba(34,211,238,.16));--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow: 0 4px 16px -4px rgba(0, 0, 0, .4);--shadow-lg: 0 12px 40px -12px rgba(0, 0, 0, .5);color-scheme:dark}[data-lang=en] .lang-zh,[data-lang=zh] .lang-en,[data-lang=en] .lang-zh-inline,[data-lang=zh] 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body:after{opacity:1;background:radial-gradient(ellipse 350px 300px at 70% 15%,rgba(139,92,246,.05) 0%,transparent 70%),radial-gradient(ellipse 450px 380px at 25% 80%,rgba(6,182,212,.05) 0%,transparent 70%);animation:orbFloatLight2 25s ease-in-out infinite alternate}@keyframes orbFloatLight{0%{transform:translate(0) scale(1)}33%{transform:translate(30px,-20px) scale(1.05)}66%{transform:translate(-20px,15px) scale(.97)}to{transform:translate(10px,-10px) scale(1.02)}}@keyframes orbFloatLight2{0%{transform:translate(0) scale(1)}50%{transform:translate(-25px,20px) scale(1.08)}to{transform:translate(15px,-15px) scale(.95)}}[data-theme=dark] body:before{opacity:1;background:radial-gradient(ellipse 800px 400px at 20% 10%,rgba(91,140,255,.12) 0%,transparent 60%),radial-gradient(ellipse 600px 500px at 80% 90%,rgba(34,211,238,.08) 0%,transparent 60%),radial-gradient(ellipse 500px 300px at 50% 50%,rgba(139,92,246,.06) 0%,transparent 60%);animation:auroraDark 18s ease-in-out infinite 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rotate(-.5deg)}}.site-header,main,.site-footer{position:relative;z-index:1}img,svg{display:block;max-width:100%}a{color:var(--accent);text-decoration:none;transition:color .15s}a:hover{color:var(--accent-2)}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}ul,ol{list-style:none}*{scrollbar-width:thin;scrollbar-color:var(--rule) transparent}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--rule);border-radius:10px;border:2px solid var(--bg)}::-webkit-scrollbar-thumb:hover{background:var(--muted)}.container{width:100%;max-width:1140px;margin:0 auto;padding:0 20px}.container-narrow{max-width:760px;margin:0 auto;padding:0 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a{color:var(--ink-2);font-size:.84rem;transition:color .15s}.foot-tool-links a:hover{color:var(--accent)}.footer-bottom{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;border-top:1px solid var(--rule);padding-top:16px}.site-footer .foot-links{display:flex;gap:18px;flex-wrap:wrap}.site-footer .foot-links a{color:var(--muted);font-size:.85rem}.site-footer .foot-links a:hover{color:var(--accent)}.card{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.card-pad{padding:22px}.card-hover{transition:transform .2s ease,box-shadow .2s ease,border-color .2s}.card-hover:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--accent)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:10px 18px;border-radius:10px;font-size:.92rem;font-weight:600;background:var(--surface);color:var(--ink);border:1px solid var(--rule);transition:all .15s 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.g{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero p{color:var(--muted);font-size:1.05rem;max-width:560px;margin:0 auto}.search-box{max-width:540px;margin:26px auto 0;position:relative}.search-box .input{padding:13px 16px 13px 44px;border-radius:14px;box-shadow:var(--shadow);font-size:.95rem}.search-box .search-ic{position:absolute;left:15px;top:50%;transform:translateY(-50%);color:var(--muted);width:18px;height:18px}.search-results{position:absolute;top:calc(100% + 6px);left:0;right:0;background:var(--surface);border:1px solid var(--rule);border-radius:12px;box-shadow:var(--shadow-lg);overflow:hidden;z-index:50;max-height:360px;overflow-y:auto}.search-results a{display:flex;align-items:center;gap:10px;padding:11px 15px;color:var(--ink-2);border-bottom:1px solid var(--rule-2);font-size:.9rem}.search-results a:last-child{border-bottom:none}.search-results a:hover{background:var(--accent-soft);color:var(--accent)}.search-results .empty{padding:18px;text-align:center;color:var(--muted);font-size:.88rem}.cat-nav{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;margin-top:22px}.cat-nav a{padding:7px 15px;border-radius:999px;background:var(--surface);border:1px solid var(--rule);color:var(--ink-2);font-size:.86rem;transition:all .15s}.cat-nav a:hover,.cat-nav a.active{background:var(--accent);color:#fff;border-color:var(--accent)}.tool-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}.tool-card{display:flex;flex-direction:column;padding:18px;background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius-lg);transition:all .2s ease;position:relative}.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--accent)}.tool-card .tc-head{display:flex;align-items:center;gap:11px;margin-bottom:9px}.tool-card .tc-icon{width:38px;height:38px;border-radius:10px;background:var(--grad-soft);display:grid;place-items:center;color:var(--accent);flex-shrink:0}.tool-card .tc-icon svg{width:20px;height:20px}.tool-card h3{font-size:1rem}.tool-card p{color:var(--muted);font-size:.84rem;margin:0 0 12px;flex:1}.tool-card .tc-tag{display:inline-block;font-size:.7rem;color:var(--accent-2);background:var(--accent-2-soft);padding:3px 9px;border-radius:6px;font-weight:600;align-self:flex-start}.section-title{display:flex;align-items:center;justify-content:space-between;margin:38px 0 18px}.section-title h2{font-size:1.35rem;display:flex;align-items:center;gap:9px}.section-title h2:before{content:"";width:4px;height:20px;background:var(--grad);border-radius:2px}.section-title .more{font-size:.85rem;color:var(--accent);font-weight:500}.cat-block{margin-bottom:26px}.cat-block-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}.cat-block-head .emoji{font-size:1.4rem}.cat-block-head h2{font-size:1.15rem;margin:0}.seo-content{padding:40px 20px 20px}.seo-content h2{font-size:1.3rem;margin-bottom:12px}.seo-content>div>p{color:var(--ink-2);max-width:720px;margin-bottom:20px}.seo-features{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.seo-feature{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius);padding:20px;transition:box-shadow .2s}.seo-feature:hover{box-shadow:var(--shadow)}.seo-feature h3{font-size:.95rem;margin-bottom:6px;color:var(--accent)}.seo-feature p{font-size:.85rem;color:var(--ink-2);margin:0}@media (max-width: 900px){.tool-grid{grid-template-columns:1fr}.tool-aside{position:static;flex-direction:column}.footer-top{flex-direction:column;gap:24px}.footer-brand{max-width:100%}}@media (max-width: 640px){body{font-size:14.5px}h1{font-size:1.65rem}.hero{padding:36px 0 26px}.hero h1{font-size:1.9rem}.grid-2,.grid-3{grid-template-columns:1fr}.field-row{flex-direction:column;gap:0}.calc-body,.doc{padding:18px}.container{padding:0 16px}.result-box .value{font-size:1.4rem}.seo-features{grid-template-columns:1fr}.footer-bottom{flex-direction:column;align-items:flex-start}}@keyframes fadeUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.fade-up{animation:fadeUp .3s ease}.tbl{width:100%;border-collapse:collapse;font-size:.88rem}.tbl th,.tbl td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--rule-2)}.tbl th{color:var(--muted);font-weight:600;font-size:.82rem;background:var(--surface-2)}.tbl tr:hover td{background:var(--surface-2)}.alert{padding:12px 16px;border-radius:10px;font-size:.88rem;margin-bottom:14px;display:flex;gap:9px;align-items:flex-start}.alert-info{background:var(--accent-soft);color:var(--accent);border:1px solid var(--accent)}.alert-warn{background:#f59e0b1a;color:var(--warn);border:1px solid var(--warn)}