:root{
  --font-sans:"Inter","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --font-mono:"SFMono-Regular","SF Mono","JetBrains Mono","Menlo","Consolas",ui-monospace,monospace;
  --bg:#F5F6FB; --bg-elev:#FFFFFF; --hero-1:#EAEEF8; --hero-2:#DFE5F3;
  --ink:#141A32; --ink-soft:#454E6E; --ink-mute:#727B99;
  --line:rgba(20,26,50,0.10); --line-2:rgba(20,26,50,0.06);
  --accent:#B86A11; --accent-fill:#E79A2E; --accent-soft:rgba(231,154,46,0.14); --jade:#0E7F63; --red:#c4453d;
  --shadow:0 1px 2px rgba(20,26,50,.05),0 12px 32px -12px rgba(20,26,50,.18);
  --c-node-a:rgba(231,154,46,.85); --c-node-b:rgba(35,120,150,.55); --c-link:rgba(20,26,50,.14);
  --radius:16px;
}
html[lang="zh"]{--font-sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Segoe UI",system-ui,sans-serif}
html[lang="zh"] body{line-height:1.75}
@media (prefers-color-scheme:dark){:root{
  --bg:#0E1428; --bg-elev:#161D34; --hero-1:#0B1022; --hero-2:#141C38;
  --ink:#E9ECF7; --ink-soft:#AEB6D0; --ink-mute:#7C86A6;
  --line:rgba(233,236,247,0.11); --line-2:rgba(233,236,247,0.06);
  --accent:#F5B44E; --accent-fill:#F5B44E; --accent-soft:rgba(245,180,78,0.13); --jade:#3FC7A6; --red:#e4655f;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 18px 40px -16px rgba(0,0,0,.55);
  --c-node-a:rgba(245,180,78,.9); --c-node-b:rgba(63,199,166,.5); --c-link:rgba(233,236,247,.12);
}}
:root[data-theme="light"]{--bg:#F5F6FB;--bg-elev:#FFFFFF;--hero-1:#EAEEF8;--hero-2:#DFE5F3;--ink:#141A32;--ink-soft:#454E6E;--ink-mute:#727B99;--line:rgba(20,26,50,0.10);--line-2:rgba(20,26,50,0.06);--accent:#B86A11;--accent-fill:#E79A2E;--accent-soft:rgba(231,154,46,0.14);--jade:#0E7F63;--red:#c4453d;--shadow:0 1px 2px rgba(20,26,50,.05),0 12px 32px -12px rgba(20,26,50,.18);--c-node-a:rgba(231,154,46,.85);--c-node-b:rgba(35,120,150,.55);--c-link:rgba(20,26,50,.14)}
:root[data-theme="dark"]{--bg:#0E1428;--bg-elev:#161D34;--hero-1:#0B1022;--hero-2:#141C38;--ink:#E9ECF7;--ink-soft:#AEB6D0;--ink-mute:#7C86A6;--line:rgba(233,236,247,0.11);--line-2:rgba(233,236,247,0.06);--accent:#F5B44E;--accent-fill:#F5B44E;--accent-soft:rgba(245,180,78,0.13);--jade:#3FC7A6;--red:#e4655f;--shadow:0 1px 2px rgba(0,0,0,.3),0 18px 40px -16px rgba(0,0,0,.55);--c-node-a:rgba(245,180,78,.9);--c-node-b:rgba(63,199,166,.5);--c-link:rgba(233,236,247,.12)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scrollbar-gutter:stable}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-sans);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.mono{font-family:var(--font-mono)}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
header{position:sticky;top:0;z-index:20;backdrop-filter:saturate(1.4) blur(12px);background:color-mix(in srgb,var(--bg) 82%,transparent);border-bottom:1px solid var(--line-2)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:1rem}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:800;font-size:1.2rem;letter-spacing:-.03em;color:var(--ink)}
.brand .mark{width:26px;height:26px;display:grid;place-items:center;filter:drop-shadow(0 3px 8px color-mix(in srgb,var(--accent-fill) 42%,transparent))}
.nav-links{display:flex;align-items:center;gap:1.4rem}
.nav-links a.lk{font-size:.95rem;color:var(--ink-soft);transition:color .18s;font-weight:500}
.nav-links a.lk:hover{color:var(--ink);text-decoration:none}
.hbtn{display:inline-flex;align-items:center;gap:.5rem;border-radius:10px;font-weight:600;font-size:.95rem;padding:.55rem 1.05rem;cursor:pointer;border:1px solid transparent;transition:.18s;text-decoration:none}
.hbtn.ghost{color:var(--ink-soft);border-color:var(--line)}.hbtn.ghost:hover{color:var(--ink);border-color:var(--ink-mute);text-decoration:none}
.hbtn.primary{background:var(--accent-fill);color:#1a1204;border-color:var(--accent-fill);font-weight:700}.hbtn.primary:hover{filter:brightness(1.06);text-decoration:none}
.langsel{position:relative}
.globe{border:1px solid var(--line);background:transparent;border-radius:9px;padding:.28rem .5rem;cursor:pointer;font-size:1rem;line-height:1;color:var(--ink-soft)}
.globe:hover{border-color:var(--ink-mute)}
.langmenu{position:absolute;right:0;top:calc(100% + .4rem);background:var(--bg-elev);border:1px solid var(--line);border-radius:10px;min-width:118px;padding:.3rem;display:none;box-shadow:var(--shadow);z-index:30}
.langmenu.show{display:block}
.langmenu a{display:block;padding:.5rem .6rem;border-radius:7px;color:var(--ink-soft);text-decoration:none;font-size:.9rem}
.langmenu a:hover{background:var(--accent-soft);color:var(--accent)}
.langmenu a.on{color:var(--accent);font-weight:600}
@media (max-width:820px){.nav-links a.lk{display:none}.nav-links{gap:.6rem}.hbtn{padding:.5rem .7rem;font-size:.88rem;white-space:nowrap}}
.hero{position:relative;overflow:hidden;background:radial-gradient(120% 120% at 82% -10%,var(--hero-2),var(--hero-1) 62%);border-bottom:1px solid var(--line)}
.hero canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.hero .wrap{position:relative;padding:2.6rem 24px 2.2rem}
main{padding:2rem 0 3.5rem}
.eyebrow{font-family:var(--font-mono);font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-weight:700}
h1{font-size:clamp(1.7rem,4.2vw,2.5rem);font-weight:800;letter-spacing:-.02em;margin:.5rem 0 .5rem}
.lede{color:var(--ink-soft);font-size:1.05rem;max-width:62ch;margin:0}
.card{background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem 1.6rem}
.card+.card{margin-top:1.1rem}
.big{font-family:var(--font-mono);font-size:clamp(1.8rem,5vw,2.6rem);font-weight:600;letter-spacing:-.01em;word-break:break-all}
.rows{margin-top:.4rem}
.kv{display:flex;gap:1rem;justify-content:space-between;align-items:baseline;padding:.62rem 0;border-top:1px solid var(--line)}
.kv:first-child{border-top:0}
.kv .k{color:var(--ink-mute);font-size:.9rem;flex:none}
.kv .v{font-family:var(--font-mono);text-align:right;word-break:break-word}
.badge{display:inline-flex;align-items:center;gap:.4rem;font-size:.8rem;font-weight:700;padding:.2rem .7rem;border-radius:999px}
.badge .dot{width:7px;height:7px;border-radius:50%;background:currentColor}
.badge.ok{background:var(--accent-soft);color:var(--jade)}
.badge.warn{background:var(--accent-soft);color:var(--accent)}
.badge.err{background:color-mix(in srgb,var(--red) 15%,transparent);color:var(--red)}
.btn{display:inline-flex;align-items:center;gap:.45rem;border:0;border-radius:11px;cursor:pointer;font-weight:700;font-size:.98rem;padding:.72rem 1.25rem;background:var(--accent-fill);color:#1a1204;font-family:inherit;transition:filter .15s,transform .1s}
.btn:hover{filter:brightness(1.06);text-decoration:none}.btn:active{transform:translateY(1px)}
.btn.sec{background:transparent;color:var(--ink-soft);border:1px solid var(--line-2)}.btn.sec:hover{color:var(--ink);border-color:var(--ink-mute)}
.muted{color:var(--ink-mute);font-size:.88rem}
input.f,textarea.f{width:100%;padding:.7rem .85rem;border:1px solid var(--line);border-radius:11px;font-size:1rem;font-family:var(--font-mono);background:var(--bg);color:var(--ink)}
input.f:focus,textarea.f:focus{outline:2px solid var(--accent-fill);outline-offset:1px}
textarea.f{resize:vertical;min-height:96px;line-height:1.5}
.grid{display:grid;gap:1rem}
.tools-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.tool{display:block;background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius);padding:1.3rem 1.4rem;box-shadow:var(--shadow);color:inherit;transition:border-color .15s,transform .15s}
.tool:hover{border-color:var(--ink-mute);transform:translateY(-2px);text-decoration:none}
.tool .ico{width:40px;height:40px;border-radius:11px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;margin-bottom:.8rem}
.tool h3{margin:0 0 .3rem;font-size:1.08rem;font-weight:700}
.tool p{margin:0;color:var(--ink-soft);font-size:.92rem}
.promo{margin-top:1.6rem;background:linear-gradient(120deg,#12203f,#1c2f57);color:#eaf0ff;border-radius:var(--radius);padding:1.5rem 1.6rem;display:flex;gap:1rem;align-items:center;justify-content:space-between;flex-wrap:wrap}
.promo h3{margin:0 0 .25rem;color:#fff;font-size:1.15rem}
.promo p{margin:0;color:#b9c4e0;font-size:.95rem;max-width:52ch}
.spin{display:inline-block;width:15px;height:15px;border:2px solid var(--line-2);border-top-color:var(--accent-fill);border-radius:50%;animation:sp .7s linear infinite;vertical-align:-2px}
@keyframes sp{to{transform:rotate(360deg)}}
footer{border-top:1px solid var(--line);color:var(--ink-mute);font-size:.86rem}
footer .row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.6rem;padding:1.4rem 0}

@media (prefers-reduced-motion:reduce){.spin{animation:none}}