:root{--bg:#10191c;--panel:#172328;--panel2:#1e2d32;--line:#304348;--text:#ecf2ea;--muted:#9fb2ae;--green:#9ce3bb;--amber:#e8bb7e;--red:#ed9d92}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 'Helvetica Neue',Helvetica,sans-serif}button,input,textarea{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin-top:0}em{font-family:Georgia,serif;font-weight:400;font-style:italic;color:var(--green)}:focus-visible{outline:3px solid var(--amber);outline-offset:3px}
.topbar{height:76px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:30px;padding:0 5%}.brand{font-size:24px;font-weight:700;letter-spacing:-.055em}.brand-icon{font:700 16px/1 monospace;background:var(--green);color:var(--bg);padding:10px 8px;border-radius:6px;margin-right:8px}.period{color:var(--green)}.top-meta,.local,.hero-rule,.overline,.explainer article>span,footer{font:11px/1.4 monospace;letter-spacing:.11em}.top-meta{color:#8fa7a1}.local{margin-left:auto;color:var(--green)}.local i{display:inline-block;width:7px;height:7px;background:var(--green);border-radius:50%;margin-right:8px}
.hero,.tool,.explainer,.faq{max-width:1300px;margin:auto}.hero{padding:80px 5% 92px}.hero-rule{display:flex;justify-content:space-between;color:var(--green);padding-bottom:14px;border-bottom:1px solid var(--line)}h1{font-family:Georgia,serif;font-size:clamp(48px,7vw,104px);font-weight:400;line-height:1.06;letter-spacing:-.06em;margin:58px 0 20px}.hero-bottom{display:flex;align-items:end;justify-content:space-between;gap:30px}.hero-bottom p{font-size:18px;color:var(--muted);max-width:555px;line-height:1.65;margin-bottom:0}.bracket-art{display:flex;align-items:center;gap:14px;font:70px/1 Georgia,serif;color:#4f6f69;white-space:nowrap}.bracket-art b{font:50px Georgia,serif;color:var(--amber);font-weight:400}
.tool{background:var(--panel);border:1px solid var(--line);margin-bottom:110px}.tool-head{display:flex;justify-content:space-between;align-items:end;padding:34px 40px 20px;gap:20px}.overline{color:var(--green);margin-bottom:8px}.tool h2,.explainer h2,.faq h2{font:400 clamp(30px,3.4vw,48px)/1.15 Georgia,serif;letter-spacing:-.04em;margin:0}.sample,.editor-head button,.upload{border:1px solid var(--line);background:transparent;color:var(--text);padding:9px 12px;font-size:12px}.sample:hover,.editor-head button:hover,.upload:hover{border-color:var(--green);color:var(--green)}.editor-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.editor{min-width:0;background:var(--panel)}.editor-head{height:56px;padding:0 22px;display:flex;align-items:center;justify-content:space-between;gap:12px}.editor-head>label{font:12px monospace;color:var(--green)}.editor-head>div{display:flex;gap:8px;align-items:center}.upload{display:inline-flex;align-items:center;cursor:pointer}.upload input{display:none}textarea{display:block;width:100%;height:360px;background:#0e171a;color:#d5e9da;border:0;border-top:1px solid var(--line);padding:24px;resize:vertical;font:13px/1.65 'SFMono-Regular',Consolas,monospace;tab-size:2}textarea::placeholder{color:#5e7771}.error{min-height:28px;margin:0;padding:6px 22px;color:var(--red);font-size:12px}.tool-actions{padding:24px 40px;display:flex;align-items:center;justify-content:space-between;gap:25px}.toggle{display:flex;align-items:center;gap:12px;cursor:pointer;font-size:14px;font-weight:700}.toggle input{accent-color:var(--green);width:18px;height:18px}.toggle span{display:flex;flex-direction:column}.toggle small{font-size:11px;font-weight:400;color:var(--muted)}.primary{border:0;background:var(--green);color:#11241b;font-weight:700;min-width:198px;padding:14px 18px;display:flex;justify-content:space-between;gap:20px}.primary:hover{background:#b9f2d0}.result{border-top:1px solid var(--line);padding:32px 40px}.result-head{display:flex;justify-content:space-between;align-items:center;gap:20px}.result h3{font:400 31px Georgia,serif;margin-bottom:0}.download{background:transparent;border:1px solid var(--green);color:var(--green);padding:11px 14px;font-size:12px}.download:hover{background:var(--green);color:var(--bg)}.counts{display:flex;gap:8px;flex-wrap:wrap;margin:25px 0}.counts span{background:#23383a;border:1px solid #355450;padding:8px 11px;color:#b9d6c4;font:12px monospace}.changes{display:grid;gap:10px;max-height:600px;overflow:auto}.change{border:1px solid var(--line);background:#122024;padding:15px}.change-top{display:flex;align-items:center;gap:13px;margin-bottom:12px}.badge{border-radius:2px;font:11px monospace;text-transform:uppercase;letter-spacing:.08em;padding:5px 7px;background:#42604e;color:#d8f4e3}.change.added .badge{background:#2a5e46}.change.removed .badge{background:#68483e}.change.changed .badge{background:#66583d}.change-top code{font:12px monospace;color:var(--amber);overflow-wrap:anywhere}.values{display:grid;grid-template-columns:1fr 1fr;gap:8px}.values>div{min-width:0;background:#0d181b;padding:10px}.values small{color:#8fa7a1;font:10px monospace;text-transform:uppercase}.values pre{white-space:pre-wrap;overflow-wrap:anywhere;color:#d4e1d8;font:12px/1.5 monospace;margin:8px 0 0}.empty{color:var(--muted);padding:18px;border:1px solid var(--line)}.status{padding:0 40px 22px;margin:0;color:var(--muted);font-size:12px}
.explainer,.faq{padding:0 5%;display:grid;grid-template-columns:.75fr 1.25fr;gap:60px;margin-bottom:115px}.explainer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.explainer article{border-top:1px solid #55736c;padding-top:15px}.explainer article>span{color:var(--green)}.explainer h3{font-size:17px;margin:20px 0 7px}.explainer p,.faq p{color:var(--muted);font-size:13px;line-height:1.7}.explainer code{color:var(--green);overflow-wrap:anywhere}.faq>div:last-child{border-top:1px solid var(--line)}.faq details{border-bottom:1px solid var(--line);padding:18px 0}.faq summary{list-style:none;cursor:pointer;font-weight:700;display:flex;justify-content:space-between;gap:15px}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:'+';color:var(--green);font-size:22px;line-height:1}.faq details[open] summary:after{content:'−'}.faq p{margin:12px 35px 0 0}footer{border-top:1px solid var(--line);padding:28px 5%;display:flex;justify-content:space-between;gap:20px;color:#87a09a}footer span:first-child{font:700 20px sans-serif;letter-spacing:-.05em;color:var(--text)}
@media(max-width:900px){.explainer,.faq{grid-template-columns:1fr;gap:25px}.bracket-art{display:none}}@media(max-width:680px){.topbar{height:66px}.top-meta{display:none}.local{font-size:0}.local i{margin:0}.hero{padding:58px 5% 65px}.hero-rule span:last-child{display:none}h1{font-size:clamp(47px,11vw,68px);margin-top:43px}.hero-bottom p{font-size:16px}.tool{margin-left:3%;margin-right:3%;margin-bottom:75px}.tool-head{padding:25px 22px 20px;align-items:start}.sample{font-size:11px}.editor-grid{grid-template-columns:1fr}.editor-grid .editor+.editor{border-top:1px solid var(--line)}textarea{height:260px}.tool-actions{padding:23px;align-items:stretch;flex-direction:column}.primary{width:100%}.result{padding:26px 22px}.result-head{align-items:start;flex-direction:column}.status{padding:0 22px 22px}.explainer-grid{grid-template-columns:1fr}.explainer,.faq{margin-bottom:80px}.values{grid-template-columns:1fr}footer{flex-wrap:wrap}}

/* ================= 重设计 · 终端族 / json（青蓝） ================= */
:root{
  --bg:#0b1316;
  --panel:#111c20;
  --panel2:#0d1719;
  --line:#1f3137;
  --text:#e6eef0;
  --muted:#8399a0;
  --green:#4fd1c5;        /* 青蓝强调 */
  --amber:#4fd1c5;
  --accent-soft:rgba(79,209,197,.12);
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}
body{background:var(--bg);color:var(--text);font:15px/1.5 var(--mono)}
h1,h2,h3,.brand{font-family:var(--mono)!important;font-weight:700;letter-spacing:-.6px}
em{font-family:var(--mono)!important;font-style:normal!important;color:var(--green)!important}
.brand{font-size:20px!important}
.topbar{height:64px!important;padding:0 clamp(16px,4vw,40px)!important;border-bottom-color:var(--line)!important}

/* ---- hero 压缩 ---- */
.hero{padding:30px clamp(16px,4vw,40px) 0!important;max-width:1180px;margin:0 auto}
.hero-rule{display:none!important}
.hero h1{font:700 clamp(25px,3.2vw,34px)/1.14 var(--mono)!important;letter-spacing:-.8px!important;margin:0 0 9px!important}
.hero h1 br{display:none}
.hero-bottom{display:block!important}
.hero-bottom p{font-size:14px!important;line-height:1.65!important;color:var(--muted)!important;
  max-width:68ch!important;margin:0!important}
.bracket-art{display:none!important}

/* ---- 工具提到首屏 ---- */
.tool{margin:16px auto 56px!important;max-width:1180px;background:var(--panel)!important;
  border:1px solid var(--line)!important;border-radius:12px;overflow:hidden;
  box-shadow:0 18px 40px rgba(0,0,0,.34)}
.tool-head{padding:16px clamp(14px,2.4vw,22px) 12px!important;align-items:center!important}
.tool-head .overline{display:none!important}
.tool-head h2{font:600 14px var(--mono)!important;letter-spacing:-.1px!important;margin:0!important;color:var(--text)!important}
.sample{border:1px solid var(--line)!important;background:transparent!important;color:var(--muted)!important;
  border-radius:999px!important;font:12px var(--mono)!important;padding:6px 13px!important;transition:all .14s}
.sample:hover{border-color:var(--green)!important;color:var(--green)!important;background:var(--accent-soft)!important}

/* ---- 编辑器：双栏对比是主角 ---- */
.editor-grid{border-top-color:var(--line)!important;border-bottom-color:var(--line)!important;
  background:var(--line)!important}
.editor{background:var(--panel)!important}
.editor-head{height:42px!important;padding:0 14px!important}
.editor-head>label{font:11.5px var(--mono)!important;color:var(--green)!important;letter-spacing:.4px}
textarea{background:var(--panel2)!important;color:#d8e9ea!important;border-top-color:var(--line)!important;
  padding:14px!important;font:12.5px/1.6 var(--mono)!important;height:300px!important}
textarea:focus{outline:none!important;box-shadow:inset 0 0 0 1px var(--green)}
textarea::placeholder{color:#55696e!important}

/* ---- 操作区 ---- */
.tool-actions{padding:14px clamp(14px,2.4vw,22px)!important}
.primary{background:var(--green)!important;color:#07201e!important;border-radius:8px!important;
  font:700 13px var(--mono)!important;min-width:0!important;padding:11px 18px!important;
  gap:12px!important;transition:background .14s}
.primary:hover{background:#6fe0d5!important}
.download{border:1px solid var(--line)!important;background:transparent!important;color:var(--muted)!important;
  border-radius:8px!important;font:12px var(--mono)!important}
.download:hover{border-color:var(--green)!important;color:var(--green)!important}

/* ---- 结果与说明 ---- */
.explainer,.faq{max-width:1180px;margin-left:auto!important;margin-right:auto!important;
  padding-left:clamp(16px,4vw,40px);padding-right:clamp(16px,4vw,40px)}
.explainer h2,.faq h2{font:700 clamp(20px,2.4vw,26px) var(--mono)!important;letter-spacing:-.7px!important}
.explainer p,.faq p{color:var(--muted)!important;font-size:13.5px!important}
.faq h3{font:600 14px var(--mono)!important;color:var(--text)!important}
code{font-family:var(--mono)!important;background:var(--panel2)!important;color:var(--green)!important}
footer{border-top-color:var(--line)!important;color:var(--muted)!important}
footer a{color:var(--green)!important}
:focus-visible{outline-color:var(--green)!important}

@media(max-width:650px){
  .hero{padding:24px 16px 0!important}
  .hero h1{font-size:24px!important}
  .tool{margin:14px 14px 40px!important}
  textarea{height:220px!important}
}

/* Contextual resources and wrapping footers. */
footer{flex-wrap:wrap}footer>*{min-width:0}.tw-xlinks{flex:0 0 100%;display:flex;flex-wrap:wrap;gap:10px 22px;padding-top:18px;border-top:1px solid var(--line,#ddd);line-height:1.7}.tw-xlinks a:hover{text-decoration:underline}
.resource-note{max-width:1100px;margin:40px auto 70px;padding:28px;border:1px solid var(--line,#ddd);border-radius:8px}.resource-note h2{font-size:22px;line-height:1.4}.resource-note p{max-width:78ch;color:var(--muted,#777)}.resource-note a{text-decoration:underline;text-underline-offset:5px}.resource-kicker{font:11px/1.5 monospace;letter-spacing:.14em}
button:disabled{opacity:.5;cursor:not-allowed}
@media(max-width:680px){.resource-note{margin:30px 16px;padding:22px}}