@font-face{font-family:'Manrope';src:url('/assets/Manrope.ttf') format('truetype');font-weight:400 800;font-style:normal;font-display:swap}
/* AI 选型台 · ai.baihoujing.com
   与主站同一套品牌色，信息密度更高。默认内容完整可见，不依赖 JS。 */

:root{
  --ink:#16283A;
  --ink-2:#233A4D;
  --ink-3:#3A5062;
  --muted:#5C6F7E;
  --muted-2:#7C8D9A;
  --line:#DDE4EA;
  --line-soft:#E9EEF2;
  --canvas:#F6F7F8;
  --surface:#FFFFFF;
  --surface-2:#F1F4F6;
  --brand:#4C7699;
  --brand-deep:#31546E;
  --sand:#D8BEA1;
  --sand-deep:#A9805A;
  --sand-soft:#F3EAE0;
  --ok:#2C6E57;
  --ok-soft:#E7F2EC;
  --warn:#8A571D;
  --warn-soft:#FBF1DF;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  --sans:"Manrope","PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,sans-serif;
  --shadow:0 1px 2px rgba(22,40,58,.04),0 12px 32px rgba(22,40,58,.06);
  --shadow-lift:0 2px 4px rgba(22,40,58,.05),0 24px 60px rgba(22,40,58,.10);
  --r:16px;
  --r-lg:24px;
  --max:1180px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--canvas);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit;color:inherit}
::selection{background:var(--sand);color:var(--ink)}

.wrap{width:min(var(--max),calc(100% - 48px));margin:0 auto}
@media (max-width:640px){.wrap{width:calc(100% - 32px)}}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:50;background:rgba(246,247,248,.88);
  backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line-soft);
}
.head-row{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand img{height:34px;width:auto}
.brand-txt{display:flex;flex-direction:column;line-height:1.15}
.brand-txt b{font-size:15px;font-weight:800;letter-spacing:.01em}
.brand-txt span{font-size:10.5px;font-weight:700;letter-spacing:.16em;color:var(--muted-2);text-transform:uppercase}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{
  padding:8px 12px;border-radius:999px;font-size:14px;font-weight:600;color:var(--ink-3);
  transition:background .18s ease,color .18s ease;white-space:nowrap;
}
.nav a:hover{background:var(--surface-2);color:var(--ink)}
.nav a[aria-current="page"]{background:var(--ink);color:#fff}
.nav .ext{color:var(--brand-deep)}
.head-cta{
  margin-left:8px;padding:9px 16px;border-radius:999px;background:var(--sand);color:var(--ink);
  font-size:13.5px;font-weight:800;white-space:nowrap;
}
.head-cta:hover{background:#E4CDB2}
.burger{display:none;margin-left:auto;width:42px;height:42px;border:1px solid var(--line);background:var(--surface);border-radius:12px;font-size:18px}
@media (max-width:960px){
  .nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--surface);
       border-bottom:1px solid var(--line);padding:12px 24px 20px;flex-direction:column;align-items:stretch;gap:2px}
  .nav.open{display:flex}
  .nav a{padding:12px 8px;border-radius:8px}
  .head-cta{display:none}
  .burger{display:block}
}

/* ---------- typography ---------- */
h1,h2,h3,h4{margin:0;line-height:1.18;letter-spacing:-.02em;font-weight:800}
h1{font-size:clamp(36px,5vw,64px)}
h2{font-size:clamp(26px,3.2vw,40px)}
h3{font-size:20px;letter-spacing:-.01em}
p{margin:0}
.eyebrow{
  display:flex;align-items:center;gap:10px;font-size:11.5px;font-weight:800;
  letter-spacing:.18em;text-transform:uppercase;color:var(--muted-2);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--sand-deep)}
.lead{font-size:18px;line-height:1.8;color:var(--ink-3)}
.muted{color:var(--muted)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.small{font-size:13px}
.tiny{font-size:12px;line-height:1.6}

/* ---------- hero ---------- */
.hero{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,.15) 78%,transparent);
}
.hero::after{
  content:"";position:absolute;width:620px;height:620px;right:-180px;top:-240px;border-radius:50%;
  background:radial-gradient(circle,rgba(216,190,161,.20),transparent 62%);
}
.hero-in{position:relative;display:grid;grid-template-columns:1.35fr .65fr;gap:56px;padding:84px 0 72px}
.hero h1{margin:22px 0 0;color:#fff;max-width:13em}
.hero h1 em{font-style:normal;color:var(--sand)}
.hero .lead{color:#C6D3DC;margin-top:22px;max-width:34em;font-size:17.5px}
.hero .eyebrow{color:#93A7B5}
.hero .eyebrow::before{background:var(--sand)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:999px;
  font-weight:800;font-size:14px;transition:transform .16s ease,background .16s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--sand);color:var(--ink)}
.btn-primary:hover{background:#E6CFB4}
.btn-ghost{border:1px solid rgba(255,255,255,.24);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.hero-card{
  align-self:end;background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-lg);padding:24px;backdrop-filter:blur(8px);
}
.hero-card .cap{font-size:10.5px;letter-spacing:.18em;font-weight:800;color:#93A7B5;text-transform:uppercase}
.hero-card .big{font-size:56px;font-weight:800;letter-spacing:-.04em;line-height:1;color:#fff;margin:14px 0 4px}
.hero-card .big span{font-size:18px;color:var(--sand);margin-left:6px;letter-spacing:0}
.hero-card dl{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:rgba(255,255,255,.12);margin:20px 0 0;border-radius:12px;overflow:hidden}
.hero-card dl div{background:rgba(22,40,58,.55);padding:12px 14px}
.hero-card dt{font-size:11px;color:#93A7B5;letter-spacing:.06em}
.hero-card dd{margin:3px 0 0;font-size:16px;font-weight:700;color:#fff}
@media (max-width:900px){
  .hero-in{grid-template-columns:1fr;gap:36px;padding:56px 0 48px}
  .hero-card{max-width:420px}
}

/* ---------- sections ---------- */
.sec{padding:76px 0}
.sec.tight{padding:52px 0}
.sec.soft{background:var(--surface-2)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:36px}
.sec-head .txt{max-width:44em}
.sec-head h2{margin-top:12px}
.sec-head p{margin-top:12px;color:var(--muted)}
.sec-link{font-size:13.5px;font-weight:800;color:var(--brand-deep);white-space:nowrap;border-bottom:1px solid var(--sand-deep);padding-bottom:2px}
@media (max-width:760px){.sec{padding:52px 0}.sec-head{flex-direction:column;align-items:flex-start;gap:16px}}

/* ---------- task cards ---------- */
.task-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.task{
  grid-column:span 2;position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:26px 24px 22px;display:flex;flex-direction:column;min-height:260px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.task:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift);border-color:#C9D5DE}
.task.wide{grid-column:span 3}
.task .no{font-family:var(--mono);font-size:11px;font-weight:700;color:var(--muted-2);letter-spacing:.08em}
.task h3{font-size:24px;margin:12px 0 8px}
.task .q{font-size:13.5px;color:var(--muted);line-height:1.65;min-height:3.3em}
.task .pick{
  margin-top:auto;padding-top:18px;border-top:1px solid var(--line-soft);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
}
.task .pick .lab{font-size:10.5px;letter-spacing:.12em;font-weight:800;color:var(--muted-2)}
.task .pick .m{font-size:14.5px;font-weight:800}
.task .arrow{font-size:18px;color:var(--sand-deep);font-weight:400}
.task.featured{background:var(--ink);border-color:var(--ink);color:#fff}
.task.featured .q{color:#B9C8D2}
.task.featured .no{color:#8FA3B1}
.task.featured .pick{border-top-color:rgba(255,255,255,.16)}
.task.featured .pick .lab{color:#8FA3B1}
.task.featured .arrow{color:var(--sand)}
@media (max-width:1000px){.task-grid{grid-template-columns:repeat(2,1fr)}.task,.task.wide{grid-column:span 1}}
@media (max-width:640px){.task-grid{grid-template-columns:1fr}}

/* ---------- generic cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media (max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.grid-3,.grid-2,.grid-4{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.card h4{font-size:15px;margin-bottom:8px}
.card p{font-size:14px;color:var(--muted);line-height:1.7}
.card .tag{display:inline-block;font-size:10.5px;font-weight:800;letter-spacing:.1em;color:var(--sand-deep);margin-bottom:10px}

/* ---------- week strip ---------- */
.week-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px}
.panel h3{font-size:17px;margin-bottom:4px}
.panel .sub{font-size:12px;color:var(--muted-2);margin-bottom:16px}
.list{list-style:none;margin:0;padding:0}
.list li{display:flex;gap:12px;padding:11px 0;border-top:1px solid var(--line-soft);font-size:13.5px;line-height:1.55}
.list li:first-child{border-top:0;padding-top:0}
.list .d{font-family:var(--mono);font-size:11.5px;color:var(--muted-2);flex:none;padding-top:2px;width:38px}
.list .t{color:var(--ink-2)}
.list a .t:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:3px}
.list .badge{flex:none;margin-left:auto;font-size:10.5px;font-weight:800;color:var(--sand-deep)}
@media (max-width:900px){.week-grid{grid-template-columns:1fr}}

/* ---------- data strip ---------- */
.strip{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.strip div{background:var(--surface);padding:22px 20px}
.strip b{display:block;font-size:30px;font-weight:800;letter-spacing:-.03em;line-height:1.1}
.strip span{font-size:12px;color:var(--muted)}
@media (max-width:760px){.strip{grid-template-columns:repeat(2,1fr)}}

/* ---------- picks ---------- */
.pick-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:16px}
.pick-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;display:flex;flex-direction:column}
.pick-card.main{background:var(--ink);color:#fff;border-color:var(--ink)}
.pick-card.main .role{color:var(--sand)}
.pick-card.main .why{color:#C6D3DC}
.pick-card.main .metric{color:#fff;border-top-color:rgba(255,255,255,.16)}
.pick-card.main .metric span{color:#8FA3B1}
.role{font-size:10.5px;font-weight:800;letter-spacing:.16em;color:var(--sand-deep);text-transform:uppercase}
.pick-card h3{font-size:25px;margin:12px 0 10px}
.why{font-size:14px;color:var(--muted);line-height:1.7;flex:1}
.metric{display:flex;align-items:baseline;gap:8px;margin-top:20px;padding-top:14px;border-top:1px solid var(--line-soft);font-size:13px;font-weight:700}
.metric span{font-size:11.5px;color:var(--muted-2);font-weight:600}
@media (max-width:900px){.pick-grid{grid-template-columns:1fr}}

/* ---------- prose ---------- */
.prose{max-width:46em}
.prose h2{font-size:28px;margin:44px 0 14px}
.prose h3{font-size:19px;margin:28px 0 10px}
.prose p{margin:12px 0;color:var(--ink-3)}
.prose ul,.prose ol{margin:12px 0;padding-left:1.2em;color:var(--ink-3)}
.prose li{margin:6px 0}
.prose strong{color:var(--ink);font-weight:800}
.prose blockquote{margin:22px 0;padding:16px 20px;border-left:3px solid var(--sand);background:var(--sand-soft);border-radius:0 12px 12px 0;color:var(--ink-2)}
.prose code{font-family:var(--mono);font-size:.9em;background:var(--surface-2);padding:2px 5px;border-radius:4px}

/* ---------- steps ---------- */
.steps{counter-reset:s;display:grid;gap:0;border-top:1px solid var(--line)}
.step{display:grid;grid-template-columns:64px 1fr 1.1fr;gap:24px;padding:24px 0;border-bottom:1px solid var(--line)}
.step::before{counter-increment:s;content:"0" counter(s);font-family:var(--mono);font-size:12px;color:var(--muted-2);padding-top:4px}
.step h3{font-size:17px}
.step p{font-size:14px;color:var(--muted)}
@media (max-width:760px){.step{grid-template-columns:40px 1fr;gap:14px}.step p{grid-column:2}}

/* ---------- table ---------- */
.table-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.table-scroll{overflow-x:auto}
table.data{width:100%;border-collapse:collapse;font-size:13.5px;min-width:860px}
table.data th{
  text-align:left;font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--muted-2);
  font-weight:800;padding:13px 14px;background:var(--surface-2);border-bottom:1px solid var(--line);white-space:nowrap;
}
table.data td{padding:13px 14px;border-bottom:1px solid var(--line-soft);vertical-align:middle}
table.data tr:last-child td{border-bottom:0}
table.data tr:hover td{background:#FAFBFC}
table.data .name{font-weight:800;font-size:14px}
table.data .ven{font-size:11.5px;color:var(--muted-2)}
table.data .num{font-family:var(--mono);font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}
table.data th.num{text-align:right}
.bar{display:inline-block;height:5px;border-radius:3px;background:var(--brand);vertical-align:middle;margin-right:7px;min-width:2px}
.pill{display:inline-block;padding:2px 8px;border-radius:999px;font-size:10.5px;font-weight:800;letter-spacing:.02em}
.pill.open{background:var(--ok-soft);color:var(--ok)}
.pill.closed{background:var(--surface-2);color:var(--muted)}
.pill.hot{background:var(--sand-soft);color:var(--sand-deep)}
.rank{font-family:var(--mono);font-size:11px;color:var(--muted-2);width:26px;display:inline-block}

/* filter bar */
.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:0 0 18px}
.filters input[type=search],.filters select{
  height:42px;border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:0 12px;font-size:13.5px;outline:none;
}
.filters input[type=search]{flex:1;min-width:200px}
.filters input:focus,.filters select:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(76,118,153,.12)}
.filters label{font-size:12.5px;font-weight:700;color:var(--muted);display:flex;align-items:center;gap:6px}
.count{font-size:12px;color:var(--muted-2);margin-left:auto;font-family:var(--mono)}

/* notes */
.note{border:1px solid var(--line);background:var(--surface);border-radius:var(--r);padding:18px 20px;font-size:13px;color:var(--muted);line-height:1.7}
.note b{color:var(--ink)}
.note.warn{background:var(--warn-soft);border-color:#EFDCBD;color:#6F4A1C}

/* ---------- timeline ---------- */
.timeline{border-left:1px solid var(--line);margin-left:6px;padding-left:26px}
.tl-item{position:relative;padding-bottom:26px}
.tl-item::before{content:"";position:absolute;left:-31px;top:7px;width:9px;height:9px;border-radius:50%;background:var(--sand);border:2px solid var(--canvas)}
.tl-item .d{font-family:var(--mono);font-size:11.5px;color:var(--muted-2)}
.tl-item h4{font-size:15px;margin:2px 0 4px}
.tl-item p{font-size:13.5px;color:var(--muted)}

/* ---------- footer ---------- */
.site-foot{background:var(--ink);color:#AFC0CB;padding:56px 0 32px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.foot-brand img{height:38px;margin-bottom:14px}
.foot-brand p{font-size:13px;line-height:1.7;max-width:24em}
.foot-col h5{font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:#7F94A2;margin:0 0 12px}
.foot-col a{display:block;font-size:13.5px;padding:5px 0;color:#C6D3DC}
.foot-col a:hover{color:#fff}
.foot-bot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:20px;font-size:12px;color:#7F94A2}
@media (max-width:900px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.foot-grid{grid-template-columns:1fr}}

/* ---------- misc ---------- */
.crumb{display:flex;gap:8px;align-items:center;font-size:12px;color:var(--muted-2);padding-top:26px}
.crumb a:hover{color:var(--brand-deep)}
.page-head{padding:22px 0 44px;border-bottom:1px solid var(--line)}
.page-head h1{margin:16px 0 0}
.page-head .lead{margin-top:16px;max-width:44em}
.kv{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.kv span{font-size:11.5px;font-weight:700;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:5px 11px;color:var(--muted)}
.tag-row{display:flex;gap:8px;flex-wrap:wrap}
.tag-row a{font-size:11.5px;font-weight:700;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:5px 11px;color:var(--ink-3)}
.tag-row a:hover{border-color:var(--brand);color:var(--brand-deep)}
.divider{height:1px;background:var(--line);margin:38px 0}
.hr-sand{width:56px;height:3px;background:var(--sand);border:0;margin:20px 0}
.footnote{font-size:12px;color:var(--muted-2);line-height:1.7}
.src-list{list-style:none;padding:0;margin:0}
.src-list li{display:grid;grid-template-columns:150px 1fr;gap:18px;padding:16px 0;border-top:1px solid var(--line-soft);font-size:13.5px}
.src-list li:first-child{border-top:0}
.src-list b{font-size:14px}
.src-list .meta{font-size:12px;color:var(--muted-2);margin-top:2px}
@media (max-width:640px){.src-list li{grid-template-columns:1fr;gap:4px}}

.reveal{opacity:1}
@media (prefers-reduced-motion:no-preference){
  .reveal{animation:rise .6s cubic-bezier(.2,.7,.2,1) both}
  .reveal:nth-child(2){animation-delay:.06s}
  .reveal:nth-child(3){animation-delay:.12s}
  .reveal:nth-child(4){animation-delay:.18s}
  .reveal:nth-child(5){animation-delay:.24s}
  @keyframes rise{from{transform:translateY(14px)}to{transform:none}}
}
@media print{.site-head,.site-foot,.hero-actions{display:none}body{background:#fff}}

/* model strength cards */
.model-card{display:flex;flex-direction:column;gap:0}
.mc-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:14px}
.mc-head h4{font-size:16px;margin:0}
.mc-row{display:grid;grid-template-columns:34px 1fr;gap:8px;padding:8px 0;border-top:1px solid var(--line-soft)}
.mc-row b{font-size:10.5px;font-weight:800;letter-spacing:.08em;color:var(--sand-deep);padding-top:3px}
.mc-row p{font-size:12.5px;line-height:1.65;color:var(--muted);margin:0}
.mc-foot{display:flex;justify-content:space-between;gap:10px;margin-top:auto;padding-top:12px;border-top:1px solid var(--line-soft);font-size:11.5px;color:var(--muted-2)}