*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 var(--font);-webkit-font-smoothing:antialiased;overflow-wrap:anywhere}
img,svg{max-width:100%}
a{color:var(--link);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--link-h)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
h1,h2,h3,h4{font-family:var(--font-head);line-height:1.3;margin:0;color:var(--ink-strong,var(--ink))}
p{margin:0 0 1em}
code{font:.9em/1.4 var(--mono);background:var(--code-bg);padding:.1em .35em;border-radius:4px}
pre{background:var(--pre-bg);color:var(--pre-ink);padding:14px 16px;border-radius:var(--radius-s);overflow:auto;font:13.5px/1.6 var(--mono);margin:0 0 1.2em}
pre code{background:none;padding:0;color:inherit}
.wrap{width:min(1180px,100% - 32px);margin-inline:auto}
main,article,aside{min-width:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:.55em 1.1em;border-radius:var(--radius-btn);font-weight:700;text-decoration:none;border:2px solid transparent;cursor:pointer;font-family:inherit;font-size:.95rem;line-height:1.3}
.btn-aff{background:var(--cta);color:var(--cta-ink);border-color:var(--cta-line,var(--cta))}
.btn-aff:hover{background:var(--cta-h);color:var(--cta-ink)}
.btn-lg{font-size:1.05rem;padding:.75em 1.6em}
.bc-disc{font-size:.78rem;color:var(--muted)}
.crumbs{font-size:.85rem;color:var(--muted);margin:0 0 14px;display:flex;flex-wrap:wrap;gap:2px 0}
.crumbs a{color:var(--muted)}
.crumbs i{font-style:normal;margin:0 .5em;opacity:.6}
.lst{margin:0 0 1.1em;padding-left:1.35em}
.lst li{margin:.3em 0}
.note{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border-radius:var(--radius-s);margin:0 0 1.2em;background:var(--note-bg);border:1px solid var(--line);font-size:.95rem}
.note strong{flex:none;font-size:.78rem;padding:.15em .6em;border-radius:99px;background:var(--primary);color:var(--primary-ink);line-height:1.6;margin-top:.15em}
.note-warn strong{background:var(--warn);color:var(--warn-ink)}
.note-ok strong{background:var(--ok);color:var(--ok-ink)}
.note-ad strong{background:var(--muted);color:var(--bg)}
.keybox{margin:0 0 1.4em;padding:14px 16px;border-radius:var(--radius);background:var(--key-bg);border:1px solid var(--line)}
.keybox-label{display:inline-block;font-size:.78rem;font-weight:800;letter-spacing:.05em;color:var(--primary);margin-bottom:4px}
.keybox p{margin:0;font-size:1.02rem}
.tbl-wrap{overflow-x:auto;margin:0 0 1.4em;border:1px solid var(--line);border-radius:var(--radius-s);background:var(--surface)}
.tbl{width:100%;border-collapse:collapse;font-size:.92rem;min-width:520px}
.tbl th,.tbl td{padding:9px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.tbl thead th{background:var(--thead-bg);font-weight:800;white-space:nowrap}
.tbl tbody th{font-weight:700;white-space:nowrap}
.tbl.wide{min-width:940px}
.tbl tr:last-child th,.tbl tr:last-child td{border-bottom:0}
.faq{margin:1.8em 0 1em}
.faq h2{margin-bottom:12px}
.faq details{border:1px solid var(--line);border-radius:var(--radius-s);background:var(--surface);margin:0 0 8px;padding:0 14px}
.faq summary{cursor:pointer;font-weight:700;padding:12px 0;list-style-position:outside}
.faq details[open] summary{color:var(--primary)}
.faq details p{margin:0 0 12px;color:var(--ink)}
.steps{list-style:none;counter-reset:st;margin:0 0 1.4em;padding:0}
.steps>li{counter-increment:st;position:relative;padding:0 0 18px 54px;margin:0}
.steps>li::before{content:counter(st);position:absolute;left:0;top:0;width:38px;height:38px;border-radius:50%;background:var(--step-bg);color:var(--step-ink);display:grid;place-items:center;font-weight:800;font-family:var(--font-head)}
.steps>li:not(:last-child)::after{content:"";position:absolute;left:18px;top:42px;bottom:4px;width:2px;background:var(--line)}
.step-t{font-size:1.06rem;margin:4px 0 4px}
.step-note{font-size:.9rem;color:var(--muted)}
.linkcards{list-style:none;margin:0 0 1.4em;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px}
.linkcards li{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-s);padding:12px 14px;display:flex;flex-direction:column;gap:2px}
.linkcards li>a{font-weight:800;text-decoration:none}
.linkcards li>span{font-size:.88rem;color:var(--muted)}
.chips{list-style:none;padding:0;margin:0 0 1.2em;display:flex;flex-wrap:wrap;gap:8px}
.chips li{padding:.2em .8em;border-radius:99px;background:var(--chip-bg);border:1px solid var(--line);font-size:.86rem}
.cross{margin:1.4em 0;padding:12px 14px;border-left:4px solid var(--accent);background:var(--cross-bg);border-radius:0 var(--radius-s) var(--radius-s) 0;font-size:.98rem}
.cross-lead{color:var(--muted);margin-right:.5em}
.cross a{font-weight:800}
.ctabox{margin:1.4em 0;padding:18px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center}
.ctabox-t{margin:0;font-weight:700;flex:1 1 240px}
.bc-list{display:grid;gap:16px;margin:0 0 1.6em}
.bc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.bc-head{display:flex;align-items:center;flex-wrap:wrap;gap:8px 10px;margin-bottom:6px}
.bc-name{font-size:1.2rem;margin:0}
.bc-name small{font-size:.75em;font-weight:400;color:var(--muted)}
.bc-rank{display:inline-grid;place-items:center;min-width:30px;height:30px;padding:0 6px;border-radius:8px;background:var(--rank-bg);color:var(--rank-ink);font-weight:800;font-family:var(--font-head)}
.bc-badge{font-size:.76rem;font-weight:800;padding:.1em .7em;border-radius:99px;background:var(--gold);color:var(--gold-ink)}
.bc-tag{margin:0 0 .6em;color:var(--ink)}
.bc-why{margin:0 0 .6em;font-size:.95rem;background:var(--key-bg);padding:8px 10px;border-radius:var(--radius-s)}
.bc-why b,.bc-fit b,.bc-warn b{color:var(--primary);margin-right:.5em;font-size:.82rem}
.bc-specs{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:6px 18px;margin:0 0 .7em}
.bc-specs div{min-width:0}
.bc-specs dt{font-size:.76rem;color:var(--muted);font-weight:700}
.bc-specs dd{margin:0;font-size:.92rem}
.bc-empty{margin:0 0 .7em;padding:8px 10px;border-radius:var(--radius-s);background:var(--note-bg);font-size:.92rem;color:var(--muted)}
.bc-fit,.bc-warn{margin:0 0 .5em;font-size:.92rem}
.bc-warn{color:var(--muted)}
.bc-foot{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;margin-top:10px;padding-top:10px;border-top:1px dashed var(--line)}
.bc-src{font-size:.78rem;color:var(--muted);flex:1 1 220px}
.bc.is-top{border:2px solid var(--gold);background:var(--top-bg);box-shadow:var(--top-shadow)}
.bc.is-top .bc-name{font-size:1.4rem}
.bc.is-top .btn-aff{padding:.7em 1.5em;font-size:1.05rem}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.theme-btn,.nav-btn{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:var(--radius-btn);padding:.4em .75em;cursor:pointer;font:inherit;font-size:.86rem}
.nav-btn{display:none}
.toc{list-style:none;margin:0;padding:0}
.toc a{display:block;padding:5px 10px;border-left:2px solid var(--line);color:var(--muted);text-decoration:none;font-size:.9rem}
.toc a.on,.toc a:hover{color:var(--primary);border-left-color:var(--primary)}
.foot-disc{font-size:.82rem;color:var(--muted);line-height:1.7}
@media(max-width:820px){.nav-btn{display:inline-block}.bc-head .bc-name{font-size:1.1rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

.skip:focus{position:static;width:auto;height:auto;clip:auto;background:#fff;color:#000;padding:6px;display:block}
.pill{display:inline-block;font-size:.74rem;line-height:1.6;padding:.05em .6em;border-radius:99px;border:1px solid var(--line);white-space:nowrap;font-weight:700}
.pill-ok{background:var(--ok);color:var(--ok-ink);border-color:transparent}
.pill-gap{background:transparent;color:var(--muted);border-style:dashed}
.pill-conflict{background:var(--warn);color:var(--warn-ink);border-color:transparent}
.pill-none{background:transparent;color:var(--muted);border-style:dotted}
.bc-tags{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0 0 .7em;padding:0}
.bc-tags li{font-size:.78rem;padding:.1em .65em;border:1px solid var(--line);border-radius:99px;background:var(--chip-bg);color:var(--ink)}
.bc-tags li.k{border-color:var(--primary);color:var(--primary);font-weight:700}
.bc-list>.bc:last-child:nth-child(even){grid-column:1/-1}
.bc-list>.bc:first-child:not(.is-top)~.bc:last-child:nth-child(odd){grid-column:1/-1}
.dimtable td,.dimtable th{text-align:center}
.dimtable tbody th{text-align:left}
.tbl.wide{min-width:820px}
.btn-lg{font-size:1.02rem}
.foot-disc{font-size:.82rem;line-height:1.75}
.notfound{text-align:center;padding:90px 0}

:root{--font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;--font-head:var(--font);--mono:ui-monospace,SFMono-Regular,"Cascadia Code",Consolas,monospace;
--radius:10px;--radius-s:7px;--radius-btn:8px;
--bg:#f0f8fa;--surface:#fff;--ink:#0f2830;--ink-strong:#061a20;--muted:#476068;--line:#cfe3e8;--primary:#0a728b;--primary-ink:#fff;--accent:#5b3cc4;--link:#0a6580;--link-h:#053f50;--focus:#5b3cc4;
--cta:#0a728b;--cta-h:#065267;--cta-ink:#fff;--gold:#ffd166;--gold-ink:#3a2a00;--top-bg:#e3f4f8;--top-shadow:0 0 0 3px rgba(10,114,139,.25);--code-bg:#dcedf1;--pre-bg:#0b2229;--pre-ink:#d7f1f7;--note-bg:#e6f3f6;--key-bg:#dcf1f6;--thead-bg:#d6eaef;--chip-bg:#ebf6f8;--cross-bg:#efeafb;--step-bg:#0a728b;--step-ink:#fff;--rank-bg:#0f2830;--rank-ink:#ffd166;--ok:#1e7a52;--ok-ink:#fff;--warn:#f2b705;--warn-ink:#2c2200}
[data-theme=dark]{--bg:#071a20;--surface:#0e2830;--ink:#e4f4f8;--ink-strong:#fff;--muted:#a3c2ca;--line:#1d4550;--primary:#4fd0ec;--primary-ink:#04222a;--accent:#b7a4ff;--link:#7fdcf2;--link-h:#b5edfa;--focus:#b7a4ff;
--cta:#4fd0ec;--cta-h:#7fdcf2;--cta-ink:#04222a;--gold:#ffd166;--gold-ink:#3a2a00;--top-bg:#0f3540;--top-shadow:0 0 0 3px rgba(79,208,236,.3);--code-bg:#153a45;--pre-bg:#04141a;--pre-ink:#cfeff6;--note-bg:#0f2f38;--key-bg:#12414d;--thead-bg:#12414d;--chip-bg:#0f2f38;--cross-bg:#1f1a3a;--step-bg:#4fd0ec;--step-ink:#04222a;--rank-bg:#ffd166;--rank-ink:#3a2a00;--ok:#5fd9a4;--ok-ink:#03211a}
body{background:var(--bg)}
.hd{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.hd .wrap{display:flex;align-items:center;gap:14px;padding:9px 0}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;margin-right:auto}
.logo i{display:grid;place-items:center;width:38px;height:38px;border-radius:8px;background:var(--pre-bg);color:#4fd0ec;font:800 .9rem/1 var(--mono);font-style:normal;border:2px solid #4fd0ec}
.logo b{font-size:1.08rem;display:block;line-height:1.15}.logo small{display:block;font-size:.72rem;color:var(--muted)}
.site-nav{display:flex;gap:2px;flex-wrap:wrap}
.site-nav a{color:var(--ink);text-decoration:none;padding:.4em .85em;font-size:.9rem;border-radius:6px}
.site-nav a:hover{background:var(--key-bg)}.site-nav a[aria-current]{background:var(--primary);color:var(--primary-ink)}
.hero{padding:38px 0 8px}
.hero-in{display:grid;grid-template-columns:1.1fr .9fr;gap:26px;align-items:center}
.hero .tag{display:inline-block;font:700 .76rem/1 var(--mono);letter-spacing:.06em;color:var(--primary);background:var(--key-bg);padding:.5em .9em;border-radius:6px;margin-bottom:14px}
.hero h1{font-size:clamp(1.9rem,4.4vw,2.8rem);line-height:1.22;margin:0 0 12px;text-wrap:balance}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero .lead{color:var(--muted);margin:0}
.term{background:var(--pre-bg);color:var(--pre-ink);border-radius:12px;overflow:hidden;box-shadow:0 10px 30px rgba(6,26,32,.22)}
.term-bar{display:flex;gap:6px;padding:10px 14px;background:rgba(255,255,255,.06)}
.term-bar i{width:11px;height:11px;border-radius:50%;background:#ff6b6b}.term-bar i:nth-child(2){background:#ffd166}.term-bar i:nth-child(3){background:#4fd0ec}
.term-body{padding:16px 18px;font:14px/1.75 var(--mono);white-space:pre-wrap}
.term-body .c{color:#7fdcf2}.term-body .m{color:#8ea9b0}.term-body .g{color:#7ee2a8}
.devsel{margin:24px 0 0}
.devsel h2{font-size:1.2rem;margin:0 0 10px}
.devtabs{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 12px;padding:0;list-style:none}
.devtabs button{font:inherit;font-size:.92rem;padding:.5em 1.1em;border-radius:8px;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer}
.devtabs button[aria-pressed=true]{background:var(--primary);color:var(--primary-ink);border-color:var(--primary);font-weight:700}
.devout{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px 20px}
.devout h3{margin:0 0 6px;font-size:1.05rem}.devout p{margin:0 0 .5em;color:var(--muted);font-size:.94rem}
.devout ul{margin:0;padding-left:1.2em}.devout li{margin:.2em 0}
.home-body{padding:6px 0 46px}
.sec{margin:30px 0 8px}
.sec>h2,.home-body h2{font-size:1.45rem;margin:0 0 6px}
.sec>p.sub{color:var(--muted);margin:0 0 14px}
.cl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:0 0 1em}
.cl-grid a{display:flex;flex-direction:column;gap:3px;padding:14px 16px;background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--primary);border-radius:10px;text-decoration:none;color:var(--ink)}
.cl-grid a:hover{border-color:var(--primary)}.cl-grid b{font-size:1rem}.cl-grid span{font-size:.84rem;color:var(--muted)}
.bc-list--doc{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.bc--doc{border-radius:10px;padding:14px 16px}
.bc--doc.is-top{grid-column:1/-1;border:2px solid var(--primary);background:linear-gradient(110deg,var(--top-bg),var(--surface) 65%)}
.dc-row{display:flex;flex-wrap:wrap;gap:6px 10px;margin:0 0 .5em;font-size:.88rem;color:var(--muted)}.dc-row b{color:var(--ink)}
.docs{display:grid;grid-template-columns:230px minmax(0,1fr);gap:26px;padding:24px 0 56px;align-items:start}
.dnav{position:sticky;top:70px;font-size:.9rem;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.dnav h2{font-size:.76rem;letter-spacing:.1em;color:var(--muted);margin:0 0 8px}
.dnav ul{list-style:none;margin:0 0 12px;padding:0}.dnav li a{display:block;padding:.3em .6em;border-radius:6px;color:var(--ink);text-decoration:none;font-size:.9rem}
.dnav li a:hover{background:var(--key-bg)}.dnav li a[aria-current]{background:var(--primary);color:var(--primary-ink);font-weight:700}
.content{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:26px 32px;min-width:0}
.content h1{font-size:clamp(1.55rem,3.5vw,2.1rem);margin-bottom:8px;line-height:1.28}
.content h2{font-size:1.28rem;margin:1.8em 0 .5em;padding-bottom:.25em;border-bottom:2px solid var(--key-bg)}
.content h3{font-size:1.04rem;margin:1.2em 0 .3em}
.lede{font-size:1.04rem;color:var(--muted);margin:0 0 .8em}
.meta{font-size:.82rem;color:var(--muted);margin:0 0 1.1em;display:flex;flex-wrap:wrap;gap:4px 14px}
.keybox{border:0;border-left:5px solid var(--primary);border-radius:0 8px 8px 0;background:var(--key-bg)}
.next{display:flex;justify-content:space-between;gap:12px;margin-top:2em;padding-top:16px;border-top:1px solid var(--line);flex-wrap:wrap}
.next a{display:flex;flex-direction:column;padding:10px 14px;border:1px solid var(--line);border-radius:8px;text-decoration:none;color:var(--ink);min-width:200px}
.next a:hover{border-color:var(--primary)}.next small{color:var(--muted);font-size:.76rem}.next b{color:var(--primary)}
.ft{background:#0a2129;color:#d6ecf1;padding:30px 0 22px;margin-top:10px}
[data-theme=dark] .ft{background:#030f13}
.ft a{color:#fff}.ft-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:26px}
.ft h2{font-size:.8rem;letter-spacing:.12em;color:#ffd166;margin-bottom:10px}
.ft ul{list-style:none;margin:0;padding:0}.ft li{margin:5px 0;font-size:.9rem}.ft p{font-size:.86rem;color:#a9c9d1}
.ft-bot{margin-top:16px;padding-top:12px;border-top:1px solid #1d4550;color:#a9c9d1}
.notfound b{display:block;font:900 5.5rem/1 var(--mono);color:var(--primary)}
@media(max-width:1000px){.hero-in{grid-template-columns:1fr}.cl-grid{grid-template-columns:repeat(2,1fr)}.docs{grid-template-columns:1fr}.dnav{position:static}.ft-grid{grid-template-columns:1fr 1fr}}
@media(max-width:820px){.site-nav{display:none;width:100%;order:9}.site-nav.open{display:flex;flex-direction:column}.hd .wrap{flex-wrap:wrap}.content{padding:20px 16px}.bc-list--doc{grid-template-columns:1fr}}
@media(max-width:560px){.cl-grid,.ft-grid{grid-template-columns:1fr}}