:root{--ink:#111;--muted:#555;--hair:#d9d9d9;--link:#0b3d91;--win:#0a6b3d;--lose:#a61b1b;
--serif:"Times New Roman",Times,"Songti SC","Noto Serif CJK SC","Source Han Serif SC",SimSun,serif;
--sans:"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:#fff;color:var(--ink);font:16px/1.8 var(--sans)}
a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}
code{font-family:Consolas,Menlo,monospace;font-size:.9em}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
.top{border-bottom:1px solid var(--ink)}
.top .wrap{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 20px;padding-top:10px;padding-bottom:8px}
.brand{font:700 19px/1.4 var(--serif);color:var(--ink)}
.brand:hover{text-decoration:none}
.tag{font-size:12px;color:var(--lose)}
nav{margin-left:auto;display:flex;flex-wrap:wrap;gap:2px 16px;font-size:15px}
nav a{color:var(--ink)}
nav a[aria-current]{text-decoration:underline;text-underline-offset:4px}
main{counter-reset:sec;padding-bottom:16px}
h1{font:700 30px/1.3 var(--serif);text-align:center;margin:36px 0 8px}
h2{font:700 20px/1.4 var(--serif);margin:36px 0 8px;counter-increment:sec;counter-reset:subsec}
h2::before{content:counter(sec);margin-right:14px}
h3{font:700 16px/1.5 var(--serif);margin:22px 0 6px;counter-increment:subsec}
h3::before{content:counter(sec) "." counter(subsec);margin-right:12px}
.muted{color:var(--muted)}
.sub{color:var(--muted);text-align:center;margin:0 0 20px}
.note{color:var(--muted);font-size:14px;margin:14px 0}
.cards{display:flex;flex-wrap:wrap;gap:8px 40px;justify-content:center;margin:18px 0}
.card{text-align:center}
.card b{display:block;font:700 26px/1.3 var(--serif)}
.card span{color:var(--muted);font-size:13px}
.table-wrap{overflow-x:auto;margin:12px 0}
table{border-collapse:collapse;width:100%;font-size:14.5px;line-height:1.5;border-top:1.5px solid var(--ink);border-bottom:1.5px solid var(--ink)}
th,td{padding:5px 10px 5px 0;text-align:left;white-space:nowrap}
th{font-weight:700;border-bottom:1px solid var(--ink)}
tbody th{border-bottom:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
td:last-child,th:last-child{padding-right:0}
table.kv th{width:10em}
input[type=search],select{padding:6px 8px;background:#fff;border:1px solid var(--ink);border-radius:0;color:var(--ink);font:inherit;font-size:15px}
input[type=search]{width:100%;max-width:360px;margin:0 0 10px}
.up{color:var(--lose)}
.down{color:var(--win)}
ul.plain{list-style:none;padding:0;margin:0}
ul.plain li{padding:4px 0}
.foot{color:var(--muted);font-size:13px;line-height:1.7;padding-top:28px;padding-bottom:36px}
.foot::before{content:"";display:block;width:200px;border-top:1px solid var(--ink);margin-bottom:10px}
.foot>a{color:var(--muted);text-decoration:underline}
.records{margin-top:8px}.records a{color:var(--muted);margin-right:16px}
@media (max-width:640px){nav{margin-left:0;width:100%}h1{font-size:25px;margin-top:24px}th,td{padding-right:8px}}
.title{text-align:center;padding:40px 0 4px}
.title h1{font-size:40px;margin:0 0 10px}
.title .sub{margin-bottom:22px}
.authors{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 48px;font-size:14px;line-height:1.5}
.authors b{display:block;font:700 16px/1.5 var(--serif)}
.authors span{color:var(--muted)}
.lead{display:grid;grid-template-columns:1fr 250px;gap:40px;align-items:start;margin:30px 0 8px}
.abstract{font-size:15px;line-height:1.85;text-align:justify}
.abstract h2{font-size:17px;text-align:center;margin:0 0 6px}
.abstract h2{counter-increment:none}.abstract h2::before{content:none}
.abstract p{margin:0 0 10px}
.abstract .eq{font-size:13px;color:var(--muted)}
.stamp{position:fixed;left:18px;top:50%;writing-mode:vertical-rl;transform:translateY(-50%) rotate(180deg);font:20px/1 var(--serif);color:#9a9a9a;letter-spacing:.5px}
.arch{margin:0;text-align:center;font-size:13px}
.arch .io{color:var(--muted);line-height:1.5}
.arch a{display:block;border:1px solid var(--ink);color:var(--ink);line-height:1.3;padding:5px 6px;margin:0 0 9px;position:relative}
.arch a:hover{text-decoration:none;outline:1px solid var(--ink)}
.arch a b{display:block;font-size:14px}
.arch a small{font:italic 12px/1.2 var(--serif)}
.arch .nx{border:1px dashed var(--ink);padding:9px 9px 0;margin:0 0 9px}
.arch figcaption{margin-top:8px;color:var(--muted)}
.bk-pink{background:#f6c9cb}.bk-orange{background:#fbd3a5}.bk-yellow{background:#f5efae}.bk-blue{background:#bfe2f0}.bk-purple{background:#d8d0ec}.bk-green{background:#c8e6c9}
.rk{text-align:center;width:3em;white-space:nowrap;padding-right:6px}
.bar{height:3px;background:var(--hair);min-width:80px;margin-top:3px}
.bar i{display:block;height:100%;background:var(--ink)}
.rating{font-weight:700;font-variant-numeric:tabular-nums}
.rating.big{font:700 28px/1.2 var(--serif)}
.pm{color:var(--muted);font-size:12px}
.chg{font-size:12px;margin-left:4px}
.good{color:var(--win)}.bad{color:var(--lose)}
.picks{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px 28px;margin:10px 0}
.pick{display:block;color:var(--ink)}
.pick:hover{text-decoration:none}
.pick:hover .n{text-decoration:underline}
.pick .t{font:italic 15px/1.5 var(--serif);color:var(--muted)}
.pick .n{font-size:18px;font-weight:700;color:var(--link)}
.pick .d{color:var(--muted);font-size:13px}
.toolbar{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:center;margin:0 0 10px;color:var(--muted);font-size:14px}
.toolbar input[type=search]{margin:0;max-width:260px}
details.how{margin:14px 0;font-size:15px}
details.how summary{cursor:pointer;color:var(--link)}
details.how li{margin:2px 0;color:var(--muted)}
.vs{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:14px 0}
.side-name{font:700 19px/1.4 var(--serif)}
.cmp-row{display:grid;grid-template-columns:1fr minmax(110px,170px) 1fr;gap:10px;align-items:center;padding:6px 0;border-bottom:1px solid var(--hair);font-size:14px}
.cmp-row .mid{text-align:center;color:var(--muted);font-size:12px}
.cmp-row .left{text-align:right}
.win{color:var(--win);font-weight:700}
.pair{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:8px 0}
.pair select{max-width:100%}
ul.list{margin:4px 0 0;padding-left:20px}
.btn{background:#fff;border:1px solid var(--ink);color:var(--ink);border-radius:0;padding:5px 14px;cursor:pointer;font:inherit;font-size:15px}
.btn:hover{background:var(--ink);color:#fff}
.cardbox{margin:18px 0 28px}
.cardbox svg{width:100%;max-width:420px;height:auto;border:1px solid var(--hair);display:block;margin:0 0 10px}
textarea.copy{width:100%;min-height:300px;background:#fff;color:var(--ink);border:1px solid var(--ink);padding:10px;font:inherit;font-size:14px}
.refs{list-style:none;padding:0;margin:6px 0;counter-reset:ref;font-size:14px}
.refs li{counter-increment:ref;padding-left:2.2em;text-indent:-2.2em;margin:3px 0}
.refs li::before{content:"[" counter(ref) "]";display:inline-block;width:2.2em;text-indent:0}
ol.lessons{padding-left:22px;margin:10px 0}
ol.lessons li{margin:10px 0}
.lesson{font-size:16px}
.lesson table{margin:12px 0}
.lesson th,.lesson td{white-space:normal;vertical-align:top}
.lesson time{white-space:nowrap}
.prompt{margin:14px 0;border-top:1.5px solid var(--ink);border-bottom:1.5px solid var(--ink)}
.prompt-head{display:flex;justify-content:space-between;align-items:center;padding:4px 0;border-bottom:.75px solid var(--ink);font-size:14px}
.prompt pre{margin:0;padding:10px 0;white-space:pre-wrap;word-break:break-word;font:15px/1.8 var(--sans)}
.copy-prompt{font:inherit;color:var(--link);background:none;border:0;padding:6px 0 6px 12px;cursor:pointer}
.copy-prompt:hover{text-decoration:underline}
.copy-state{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.sample{margin:18px 0}
.sample svg{display:block;width:100%;max-width:520px;height:auto;margin:0 auto}
.sample figcaption{margin-top:8px;color:var(--muted);font-size:14px}
.pager{font-size:14px;margin-top:28px;padding-top:10px;border-top:1px solid var(--hair)}
.subnav{display:flex;flex-wrap:wrap;gap:2px 14px;margin:14px 0 0;font-size:14px}
.subnav a{color:var(--muted)}
.subnav a[aria-current]{color:var(--ink);text-decoration:underline;text-underline-offset:4px}
@media (max-width:1180px){.stamp{display:none}}
@media (max-width:720px){.lead{grid-template-columns:1fr;gap:24px}.arch{max-width:280px;margin:0 auto}.title{padding-top:28px}.title h1{font-size:32px}.vs{grid-template-columns:1fr}}
.answer{margin:16px 32px 22px;padding:10px 0;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);font-size:15.5px}
.answer p{margin:6px 0}
.answer .muted{font-size:13.5px}
.yes{color:var(--win)}.no{color:var(--lose)}
td.lead{color:var(--win);font-weight:700}
.tier{display:flex;gap:16px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--hair)}
.tier:last-of-type{border-bottom:1.5px solid var(--ink)}
.tier .lab{flex:0 0 76px;border:1px solid var(--ink);font:700 20px/1.2 var(--serif);text-align:center;padding:6px 2px}
.tier .lab small{display:block;font:400 12px/1.4 var(--sans)}
.t0{background:#fbd3a5}.t1{background:#f5efae}.t2{background:#bfe2f0}.t3{background:#d8d0ec}
.chips{line-height:1.9}
.chip{display:inline-block;margin-right:18px;font-size:15px;color:var(--ink);white-space:nowrap}
.chip small{color:var(--muted)}
ul.cols{columns:2 280px;padding-left:20px;margin:6px 0}
ul.cols li{margin:3px 0}
.board{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;padding:12px 0;margin:12px 0 4px;border-top:1.5px solid var(--ink);border-bottom:1.5px solid var(--ink)}
.board .team{text-align:center;color:var(--ink)}
.board .team b{display:block;font:700 22px/1.3 var(--serif)}
.board small{display:block;color:var(--muted);font-size:12px}
.board .mid{text-align:center}
.board .big{font:700 40px/1.1 var(--serif);font-variant-numeric:tabular-nums}
.board .big .w{color:var(--win)}
.duel{display:grid;grid-template-columns:1fr minmax(80px,150px) 1fr;gap:10px;align-items:center;padding:6px 0;border-bottom:1px solid var(--hair)}
.duel b{font-size:15px;font-variant-numeric:tabular-nums}
.duel small{display:block;color:var(--muted);font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.duel .bar{min-width:0}
.duel .win b{color:var(--win)}.duel .win .bar i{background:var(--win)}
.d-l{text-align:right}.d-l .bar i{margin-left:auto}
.d-mid{text-align:center;font-size:13px}
.d-mid span{display:block;color:var(--muted);font-size:12px}
.duel-head{display:grid;grid-template-columns:1fr minmax(80px,150px) 1fr;gap:10px;font-size:13px;font-weight:700;padding:4px 0;border-top:1.5px solid var(--ink);border-bottom:1px solid var(--ink)}
.duel-head span:first-child{text-align:right}.duel-head span:nth-child(2){text-align:center}
ul.choose{margin:6px 0;padding-left:20px}
ul.choose li{margin:3px 0}
table.kv2{table-layout:fixed}
table.kv2 th{width:7.5em;white-space:normal}
table.kv2 td{white-space:normal;word-break:break-word}
table.qa td{white-space:normal;vertical-align:top}
table.qa td:first-child{white-space:nowrap}
table.qa small{display:block;color:var(--muted);font-size:12px}
.search{max-width:none;margin:14px 0 0}
.search input{max-width:none;margin:0}
ul.sugg{list-style:none;margin:0;padding:0;border:1px solid var(--ink);border-top:0;text-align:left}
ul.sugg:empty{display:none}
ul.sugg a{display:block;padding:5px 8px;color:var(--ink)}
ul.sugg a:hover,ul.sugg a.on{background:var(--ink);color:#fff;text-decoration:none}
ul.sugg a:hover small,ul.sugg a.on small{color:#ddd}
ul.sugg small{color:var(--muted);margin-left:8px}
@media (max-width:640px){.answer{margin-left:0;margin-right:0}.board .team b{font-size:18px}.board .big{font-size:32px}.tier .lab{flex-basis:60px;font-size:17px}.chips{min-width:0}.chip{white-space:normal}}
.now{text-align:center;margin:26px 0 6px;font:700 34px/1.3 var(--serif)}
.now.bad{color:var(--lose)}
.when{text-align:center;color:var(--muted);font-size:14px;margin:0 0 24px}
.st-ok{color:var(--win);font-weight:700}.st-wobble{color:#8a5f00;font-weight:700}.st-down{color:var(--lose);font-weight:700}.st-unknown{color:var(--muted)}
.strip{display:inline-flex;gap:1px;height:16px;align-items:stretch;vertical-align:middle}
.strip i{display:block;width:3px;background:#cfcfcf}
.strip i.w{background:#d9a400}.strip i.b{background:var(--lose)}.strip i.n{background:#f0f0f0}
.strip.wide{display:flex;width:100%;margin:8px 0 4px}.strip.wide i{flex:1;width:auto}
.big{text-align:center;margin:14px 0 6px;font:700 42px/1.2 var(--serif)}
.leg{color:var(--muted);font-size:13px}
.alert{border:1px solid var(--lose);color:var(--lose);padding:6px 10px;font-size:14px;margin:12px 0}
.live{margin:0 0 18px;font-size:15px}
.title .live:empty{display:none}
@media (max-width:640px){.now{font-size:27px}.big{font-size:33px}.hide-m{display:none}}