/* 雅润 AI 算力云 — 设计系统
   深色单一主题（刻意选择）：近黑蓝底 + 青绿信号色 + 琥珀能量色。 */

@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,500;12..96,700;12..96,800&family=JetBrains+Mono:wght@400;500;700&family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root{
  color-scheme: dark;
  --ink-0:#05080c;
  --ink-1:#080d14;
  --surf:#0e1620;
  --surf-2:#141f2c;
  --surf-3:#1b2836;
  --line:#1d2a38;
  --line-2:#2a3b4d;

  --fg:#e9f1f8;
  --fg-2:#93a6ba;
  --fg-3:#5f7386;

  --aqua:#3ee8c8;
  --aqua-2:#1fbfa4;
  --aqua-ink:#04221d;
  --amber:#ffa63d;
  --blue:#4d9dff;
  --rose:#ff6b81;
  --lime:#a8e05f;

  --ok:#3ee8c8; --warn:#ffa63d; --bad:#ff6b81;

  --glow: 0 0 0 1px rgba(62,232,200,.18), 0 10px 40px -12px rgba(62,232,200,.30);
  --shadow: 0 1px 0 rgba(255,255,255,.03) inset, 0 18px 40px -24px rgba(0,0,0,.9);

  --disp:"Bricolage Grotesque","Noto Sans SC",system-ui,sans-serif;
  --sans:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  --wrap:1200px;
  --nav-h:62px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--ink-0); color:var(--fg);
  font-family:var(--sans); font-size:15px; line-height:1.65;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,canvas{max-width:100%}
a{color:inherit; text-decoration:none}
button,input,select,textarea{font:inherit; color:inherit}
button{cursor:pointer; background:none; border:0}
:focus-visible{outline:2px solid var(--aqua); outline-offset:3px; border-radius:4px}
::selection{background:rgba(62,232,200,.25)}
@media (prefers-reduced-motion:reduce){*{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto}}

/* ---------- scrollbar ---------- */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--ink-1)}
::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:6px;border:2px solid var(--ink-1)}
::-webkit-scrollbar-thumb:hover{background:#38506a}

/* ---------- layout ---------- */
.wrap{width:100%; max-width:var(--wrap); margin-inline:auto; padding-inline:24px}
.sec{padding-block:96px; position:relative}
.sec.tight{padding-block:64px}
.sec.alt{background:var(--ink-1); border-block:1px solid var(--line)}

/* ---------- type ---------- */
h1,h2,h3,h4{font-family:var(--disp); font-weight:700; margin:0; letter-spacing:-.02em; text-wrap:balance; line-height:1.15}
.h-xl{font-size:clamp(2.4rem,5.6vw,4.4rem); font-weight:800; letter-spacing:-.035em; line-height:1.04}
.h-lg{font-size:clamp(1.8rem,3.4vw,2.9rem); letter-spacing:-.028em}
.h-md{font-size:clamp(1.25rem,2vw,1.6rem); letter-spacing:-.02em}
.lede{font-size:clamp(1rem,1.5vw,1.15rem); color:var(--fg-2); max-width:62ch; line-height:1.75}
.muted{color:var(--fg-2)}
.dim{color:var(--fg-3)}
.mono{font-family:var(--mono); font-variant-numeric:tabular-nums}
.grad{background:linear-gradient(96deg,var(--aqua) 8%,var(--blue) 92%);
  -webkit-background-clip:text; background-clip:text; color:transparent}

.eyebrow{display:inline-flex; align-items:center; gap:10px; font-family:var(--mono);
  font-size:11.5px; letter-spacing:.18em; text-transform:uppercase; color:var(--aqua); margin-bottom:18px}
.eyebrow::before{content:""; width:26px; height:1px; background:linear-gradient(90deg,transparent,var(--aqua))}

.sec-head{margin-bottom:44px; max-width:70ch}
.sec-head .lede{margin-top:14px}

/* ---------- nav ---------- */
.nav{position:fixed; inset:0 0 auto; height:var(--nav-h); z-index:60;
  display:flex; align-items:center; transition:background .25s, border-color .25s, backdrop-filter .25s;
  border-bottom:1px solid transparent}
.nav.solid{background:rgba(5,8,12,.82); backdrop-filter:blur(16px) saturate(1.4); border-bottom-color:var(--line)}
.nav .wrap{display:flex; align-items:center; gap:30px}
.logo{display:flex; align-items:center; gap:10px; flex:none}
.logo-mk{width:28px;height:28px;border-radius:7px;position:relative;flex:none;
  background:linear-gradient(135deg,var(--aqua),var(--blue));display:grid;place-items:center;
  box-shadow:0 0 22px -4px rgba(62,232,200,.6)}
.logo-mk b{font-family:var(--mono);font-size:12px;font-weight:700;color:var(--aqua-ink)}
.logo-tx{font-family:var(--disp); font-weight:700; font-size:16px; letter-spacing:-.01em; white-space:nowrap}
.logo-tx i{font-style:normal;color:var(--fg-3);font-weight:500}

.nav-links{display:flex; gap:4px; align-items:center; margin-left:8px}
.nav-links a{padding:7px 13px; border-radius:7px; font-size:14px; color:var(--fg-2); transition:color .15s,background .15s}
.nav-links a:hover{color:var(--fg); background:var(--surf-2)}
.nav-links a.on{color:var(--fg)}
.nav-right{margin-left:auto; display:flex; gap:10px; align-items:center}
.navtoggle{display:none; width:38px;height:38px; border:1px solid var(--line-2); border-radius:8px; place-items:center}
.navtoggle span{display:block;width:16px;height:1.5px;background:var(--fg);box-shadow:0 5px 0 var(--fg),0 -5px 0 var(--fg)}

/* ---------- buttons ---------- */
.btn{display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:10px 20px; border-radius:9px; font-size:14px; font-weight:500; white-space:nowrap;
  border:1px solid var(--line-2); color:var(--fg); background:var(--surf-2);
  transition:transform .14s, border-color .16s, background .16s, box-shadow .16s}
.btn:hover{transform:translateY(-1px); border-color:var(--line-2); background:var(--surf-3)}
.btn-pri{background:linear-gradient(135deg,var(--aqua),var(--aqua-2)); color:var(--aqua-ink);
  border-color:transparent; font-weight:700;
  box-shadow:0 8px 26px -10px rgba(62,232,200,.65)}
.btn-pri:hover{background:linear-gradient(135deg,#57f4d6,#25cfb1); box-shadow:0 12px 34px -10px rgba(62,232,200,.8)}
.btn-ghost{background:transparent}
.btn-ghost:hover{background:var(--surf-2)}
.btn-sm{padding:7px 14px; font-size:13px; border-radius:8px}
.btn-lg{padding:13px 26px; font-size:15px; border-radius:10px}
.btn[disabled]{opacity:.5; pointer-events:none}
.btn .ar{transition:transform .18s}
.btn:hover .ar{transform:translateX(3px)}

/* ---------- hero ---------- */
.hero{position:relative; padding-top:calc(var(--nav-h) + 72px); padding-bottom:84px; overflow:hidden}
.hero-canvas{position:absolute; inset:0; width:100%; height:100%; z-index:0; opacity:1}
.hero::after{content:""; position:absolute; inset:0; z-index:1; pointer-events:none;
  background:radial-gradient(120% 80% at 50% 0%, transparent 30%, var(--ink-0) 88%)}
.hero .wrap{position:relative; z-index:2}
.hero-badge{display:inline-flex; align-items:center; gap:9px; padding:5px 13px 5px 6px; border-radius:100px;
  border:1px solid var(--line-2); background:rgba(20,31,44,.7); backdrop-filter:blur(8px);
  font-size:12.5px; color:var(--fg-2); margin-bottom:26px}
.hero-badge b{display:inline-flex;align-items:center;gap:6px; padding:3px 9px; border-radius:100px;
  background:rgba(62,232,200,.14); color:var(--aqua); font-size:11px; font-family:var(--mono); font-weight:500;
  letter-spacing:.04em}
.pulse{width:6px;height:6px;border-radius:50%;background:var(--aqua);
  box-shadow:0 0 0 0 rgba(62,232,200,.7); animation:pulse 2.4s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 8px rgba(62,232,200,0)}100%{box-shadow:0 0 0 0 rgba(62,232,200,0)}}
.hero h1{max-width:17ch; margin-bottom:22px}
.hero .lede{max-width:56ch; font-size:clamp(1.02rem,1.6vw,1.2rem)}
.hero-cta{display:flex; gap:12px; flex-wrap:wrap; margin-top:36px}
.hero-stats{display:grid; grid-template-columns:repeat(4,1fr); gap:1px; margin-top:64px;
  background:var(--line); border:1px solid var(--line); border-radius:14px; overflow:hidden}
.hero-stat{background:rgba(14,22,32,.86); backdrop-filter:blur(10px); padding:20px 22px}
.hero-stat .v{font-family:var(--mono); font-size:clamp(1.4rem,2.4vw,1.95rem); font-weight:700;
  letter-spacing:-.03em; line-height:1.1; color:var(--fg)}
.hero-stat .v small{font-size:.58em; font-weight:500; color:var(--fg-2); margin-left:4px}
.hero-stat .k{font-size:12.5px; color:var(--fg-3); margin-top:6px}

/* ---------- cards ---------- */
.cards{display:grid; gap:16px}
.c2{grid-template-columns:repeat(2,1fr)}
.c3{grid-template-columns:repeat(3,1fr)}
.c4{grid-template-columns:repeat(4,1fr)}
.card{position:relative; background:var(--surf); border:1px solid var(--line); border-radius:14px;
  padding:24px; transition:border-color .2s, transform .2s, background .2s; overflow:hidden}
.card::before{content:""; position:absolute; inset:0 0 auto; height:1px;
  background:linear-gradient(90deg,transparent,rgba(62,232,200,.5),transparent);
  opacity:0; transition:opacity .25s}
.card:hover{border-color:var(--line-2); transform:translateY(-3px); background:var(--surf-2)}
.card:hover::before{opacity:1}
.card h3{font-size:17px; margin-bottom:9px}
.card p{color:var(--fg-2); font-size:14px; margin:0; line-height:1.7}
.card-num{font-family:var(--mono); font-size:11.5px; color:var(--aqua); letter-spacing:.14em; margin-bottom:14px; display:block}
.card-ico{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(62,232,200,.1); border:1px solid rgba(62,232,200,.2); color:var(--aqua)}
.card-ico svg{width:19px;height:19px}

/* feature list */
.flist{list-style:none; padding:0; margin:16px 0 0; display:flex; flex-direction:column; gap:9px}
.flist li{display:flex; gap:10px; font-size:13.5px; color:var(--fg-2); line-height:1.6}
.flist li::before{content:""; flex:none; width:5px;height:5px;border-radius:50%;background:var(--aqua);margin-top:8px;
  box-shadow:0 0 8px rgba(62,232,200,.8)}

/* ---------- chips / pills / tags ---------- */
.tag{display:inline-flex; align-items:center; gap:5px; font-family:var(--mono); font-size:11px;
  padding:2.5px 8px; border-radius:5px; background:var(--surf-3); color:var(--fg-2); border:1px solid var(--line)}
.tag.aqua{background:rgba(62,232,200,.1); color:var(--aqua); border-color:rgba(62,232,200,.25)}
.tag.amber{background:rgba(255,166,61,.1); color:var(--amber); border-color:rgba(255,166,61,.25)}
.tag.rose{background:rgba(255,107,129,.1); color:var(--rose); border-color:rgba(255,107,129,.25)}
.tag.blue{background:rgba(77,157,255,.1); color:var(--blue); border-color:rgba(77,157,255,.25)}
.tag.unk{color:var(--fg-3); font-style:italic}

.filters{display:flex; gap:8px; flex-wrap:wrap; align-items:center}
.fchip{padding:7px 15px; border-radius:100px; font-size:13.5px; border:1px solid var(--line);
  background:var(--surf); color:var(--fg-2); transition:all .15s}
.fchip:hover{border-color:var(--line-2); color:var(--fg)}
.fchip.on{background:rgba(62,232,200,.12); border-color:rgba(62,232,200,.4); color:var(--aqua); font-weight:500}

/* ---------- model cards ---------- */
.mgrid{display:grid; grid-template-columns:repeat(auto-fill,minmax(292px,1fr)); gap:14px}
.mcard{background:var(--surf); border:1px solid var(--line); border-radius:13px; padding:20px;
  display:flex; flex-direction:column; gap:12px; transition:all .2s; cursor:pointer; position:relative}
.mcard:hover{border-color:rgba(62,232,200,.35); background:var(--surf-2); transform:translateY(-2px);
  box-shadow:0 16px 40px -22px rgba(0,0,0,.9)}
.mcard-top{display:flex; align-items:flex-start; gap:11px}
.mcard-av{width:34px;height:34px;border-radius:9px;flex:none;display:grid;place-items:center;
  font-family:var(--mono);font-size:13px;font-weight:700;
  background:linear-gradient(140deg,var(--surf-3),var(--surf-2));border:1px solid var(--line-2)}
.mcard h3{font-size:15.5px; margin:0; letter-spacing:-.01em}
.mcard .vend{font-size:12px; color:var(--fg-3); margin-top:1px}
.mcard p{font-size:13px; color:var(--fg-2); line-height:1.65; margin:0; flex:1}
.mcard-meta{display:flex; gap:6px; flex-wrap:wrap}
.mcard-foot{display:flex; gap:14px; padding-top:12px; border-top:1px solid var(--line); font-size:12px;
  color:var(--fg-3); font-family:var(--mono)}
.mcard-foot b{color:var(--fg-2); font-weight:500}
.mcard .star{position:absolute; top:16px; right:16px; color:var(--amber); font-size:11px}

/* ---------- partner cards ---------- */
.pgrid{display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:13px}
.pcard{background:var(--surf); border:1px solid var(--line); border-radius:13px; padding:19px;
  display:flex; flex-direction:column; gap:9px; transition:all .2s}
.pcard:hover{border-color:var(--line-2); background:var(--surf-2)}
.pcard.gold{border-color:rgba(255,166,61,.35); background:linear-gradient(150deg,rgba(255,166,61,.07),var(--surf) 60%)}
.pcard-h{display:flex; align-items:center; gap:10px}
.pcard-h h3{font-size:15px; margin:0}
.pcard .who{font-size:13px; color:var(--fg-2); line-height:1.6}
.pcard .met{font-family:var(--mono); font-size:11.5px; color:var(--fg-3); line-height:1.75;
  padding-top:9px; border-top:1px solid var(--line)}
.pcard .cases{font-size:12px; color:var(--fg-2); line-height:1.7; padding:10px 12px; border-radius:8px;
  background:rgba(62,232,200,.06); border:1px solid rgba(62,232,200,.16)}
.pcard .cases b{color:var(--aqua); font-family:var(--mono); font-size:10.5px; letter-spacing:.1em;
  display:block; margin-bottom:4px; font-weight:500}

/* ---------- table ---------- */
.tw{overflow-x:auto; border:1px solid var(--line); border-radius:13px; background:var(--surf)}
table{width:100%; border-collapse:collapse; font-size:13.5px}
thead th{text-align:left; font-family:var(--mono); font-size:10.5px; letter-spacing:.1em; text-transform:uppercase;
  color:var(--fg-3); font-weight:500; padding:12px 16px; border-bottom:1px solid var(--line);
  background:var(--ink-1); white-space:nowrap; position:sticky; top:0; z-index:2}
tbody td{padding:12px 16px; border-bottom:1px solid var(--line); vertical-align:middle}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:var(--surf-2)}
td.num,th.num{text-align:right; font-family:var(--mono); font-variant-numeric:tabular-nums}
td.ctr{text-align:center}

/* matrix cells */
.mx .yes{color:var(--aqua); font-weight:500}
.mx .exp{color:var(--amber)}
.mx .no{color:var(--rose); font-weight:500}
.mx .unk{color:var(--fg-3); font-style:italic; font-size:12.5px}
.mx .com{color:var(--fg-2)}

/* ---------- code ---------- */
pre.code{margin:0; overflow-x:auto; font-family:var(--mono); font-size:13px; line-height:1.8;
  background:var(--ink-1); border:1px solid var(--line); border-radius:11px; padding:18px 20px; color:#cfe3f2}
pre.code .k{color:var(--rose)} pre.code .s{color:var(--aqua)} pre.code .c{color:var(--fg-3)}
pre.code .f{color:var(--blue)} pre.code .n{color:var(--amber)}
.codebox{border:1px solid var(--line); border-radius:12px; overflow:hidden; background:var(--ink-1)}
.codebox-h{display:flex; align-items:center; gap:10px; padding:9px 14px; border-bottom:1px solid var(--line);
  background:var(--surf); font-family:var(--mono); font-size:12px; color:var(--fg-3)}
.codebox-h .dots{display:flex;gap:5px}
.codebox-h .dots i{width:9px;height:9px;border-radius:50%;background:var(--line-2)}
.codebox pre.code{border:0; border-radius:0}
.copybtn{margin-left:auto; font-family:var(--mono); font-size:11.5px; color:var(--fg-3);
  padding:3px 9px; border-radius:6px; border:1px solid var(--line-2); transition:all .15s}
.copybtn:hover{color:var(--aqua); border-color:rgba(62,232,200,.4)}

/* ---------- note ---------- */
.note{font-size:13px; color:var(--fg-2); background:var(--surf); border:1px solid var(--line);
  border-left:2px solid var(--aqua); padding:14px 17px; border-radius:9px; line-height:1.8}
.note b{color:var(--fg)}
.note.amber{border-left-color:var(--amber)}

/* ---------- flow diagram (首页链路) ---------- */
.flow{display:grid; grid-template-columns:repeat(5,1fr); gap:0; margin-top:8px;
  border:1px solid var(--line); border-radius:14px; overflow:hidden; background:var(--surf)}
.flow-step{padding:24px 20px; border-right:1px solid var(--line); position:relative; transition:background .2s}
.flow-step:last-child{border-right:0}
.flow-step:hover{background:var(--surf-2)}
.flow-step .n{font-family:var(--mono); font-size:11px; color:var(--aqua); letter-spacing:.14em; display:block; margin-bottom:12px}
.flow-step h4{font-size:14.5px; margin-bottom:7px}
.flow-step p{font-size:12.5px; color:var(--fg-2); margin:0; line-height:1.65}
.flow-step::after{content:""; position:absolute; right:-5px; top:50%; width:9px;height:9px;
  border-top:1px solid var(--aqua); border-right:1px solid var(--aqua); transform:translateY(-50%) rotate(45deg); opacity:.55}
.flow-step:last-child::after{display:none}

/* ---------- stat strip ---------- */
.strip{display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line);
  border:1px solid var(--line); border-radius:13px; overflow:hidden}
.strip > div{background:var(--surf); padding:20px 22px}
.strip .v{font-family:var(--mono); font-size:1.7rem; font-weight:700; letter-spacing:-.03em; line-height:1.15}
.strip .k{font-size:12.5px; color:var(--fg-3); margin-top:5px}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line); background:var(--ink-1); padding-block:56px 34px; margin-top:40px}
.foot-grid{display:grid; grid-template-columns:1.6fr repeat(3,1fr); gap:34px}
.foot h5{font-family:var(--mono); font-size:11px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--fg-3); margin:0 0 15px; font-weight:500}
.foot ul{list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:9px}
.foot a{font-size:13.5px; color:var(--fg-2); transition:color .15s}
.foot a:hover{color:var(--aqua)}
.foot-bot{margin-top:44px; padding-top:22px; border-top:1px solid var(--line);
  display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap;
  font-size:12.5px; color:var(--fg-3)}

/* ---------- reveal ---------- */
.rv{opacity:0; transform:translateY(14px); transition:opacity .6s cubic-bezier(.2,.7,.3,1), transform .6s cubic-bezier(.2,.7,.3,1)}
.rv.in{opacity:1; transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none}}

/* ---------- forms ---------- */
.field{display:flex; flex-direction:column; gap:7px; margin-bottom:16px}
.field label{font-size:13px; color:var(--fg-2)}
.inp{width:100%; padding:11px 14px; border-radius:9px; background:var(--ink-1);
  border:1px solid var(--line-2); color:var(--fg); font-size:14px; transition:border-color .15s, background .15s}
.inp:focus{outline:none; border-color:var(--aqua); background:var(--surf)}
.inp::placeholder{color:var(--fg-3)}
select.inp{appearance:none; background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4.5L6 8.5L10 4.5' stroke='%235f7386' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat; background-position:right 13px center; padding-right:34px}
.err{font-size:13px; color:var(--rose); background:rgba(255,107,129,.08);
  border:1px solid rgba(255,107,129,.25); padding:10px 13px; border-radius:8px; margin-bottom:14px}
.okmsg{font-size:13px; color:var(--aqua); background:rgba(62,232,200,.08);
  border:1px solid rgba(62,232,200,.25); padding:10px 13px; border-radius:8px; margin-bottom:14px}

/* role picker */
.roles{display:grid; grid-template-columns:repeat(3,1fr); gap:9px; margin-bottom:18px}
.rolebtn{padding:13px 11px; border-radius:10px; border:1px solid var(--line-2); background:var(--ink-1);
  text-align:center; transition:all .16s}
.rolebtn:hover{border-color:var(--line-2); background:var(--surf)}
.rolebtn.on{border-color:var(--aqua); background:rgba(62,232,200,.09)}
.rolebtn b{display:block; font-size:13.5px; margin-bottom:3px}
.rolebtn span{font-size:11.5px; color:var(--fg-3); line-height:1.4; display:block}

/* toast */
.toast{position:fixed; bottom:24px; left:50%; transform:translateX(-50%) translateY(80px);
  background:var(--surf-2); border:1px solid var(--line-2); border-radius:10px; padding:12px 20px;
  font-size:13.5px; z-index:200; opacity:0; transition:all .3s; box-shadow:var(--shadow); max-width:90vw}
.toast.show{opacity:1; transform:translateX(-50%) translateY(0)}
.toast.ok{border-color:rgba(62,232,200,.4)}
.toast.bad{border-color:rgba(255,107,129,.4)}

/* ---------- responsive ---------- */
@media (max-width:1040px){
  .c4{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .flow-step{border-bottom:1px solid var(--line)}
  .flow-step::after{display:none}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .logo-tx i{display:none}
  .logo-tx{font-size:15px}
  .nav .wrap{gap:12px}
  .nav-right{gap:7px}
  .nav-links{display:none}
  .nav-links.open{display:flex; position:absolute; top:var(--nav-h); left:0; right:0; flex-direction:column;
    background:rgba(5,8,12,.97); backdrop-filter:blur(16px); border-bottom:1px solid var(--line); padding:12px; gap:2px}
  .nav-links.open a{padding:11px 14px}
  .navtoggle{display:grid}
  .sec{padding-block:64px}
  .hero-stats,.strip{grid-template-columns:repeat(2,1fr)}
  .c2,.c3{grid-template-columns:1fr}
  .roles{grid-template-columns:1fr}
}
@media (max-width:560px){
  .wrap{padding-inline:18px}
  #navreg{display:none}          /* Hero 里已有主 CTA，导航栏只留登录 */
  .logo-mk{width:26px;height:26px}
  .logo-tx{font-size:14px}
  .hero{padding-top:calc(var(--nav-h) + 48px)}
  .foot-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
}

/* ---------- 防止代码块/表格把 grid 列顶宽（min-width:auto 的经典坑） ---------- */
.split > *, .cards > *, .grid > *, .g2 > *, .g21 > *, .mgrid > *, .pgrid > *{min-width:0}
.codebox, pre.code{min-width:0; max-width:100%}
pre.code{white-space:pre; overflow-x:auto}

/* ---------- 内页页头 ---------- */
.pagehead{padding-top:calc(var(--nav-h) + 64px); padding-bottom:36px; position:relative; overflow:hidden;
  border-bottom:1px solid var(--line); background:
    radial-gradient(90% 120% at 12% 0%, rgba(62,232,200,.09), transparent 58%),
    radial-gradient(70% 100% at 88% 10%, rgba(77,157,255,.07), transparent 60%), var(--ink-1)}
.pagehead h1{font-size:clamp(2rem,4vw,3.1rem); letter-spacing:-.03em; margin-bottom:14px}
.pagehead .lede{max-width:64ch}
.pagehead .wrap{position:relative;z-index:2}
.grid-bg{position:absolute;inset:0;z-index:1;opacity:.5;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:54px 54px;
  mask-image:radial-gradient(80% 100% at 50% 0%,#000,transparent 75%);
  -webkit-mask-image:radial-gradient(80% 100% at 50% 0%,#000,transparent 75%)}

/* ---------- 抽屉 ---------- */
.drawer-bd{position:fixed;inset:0;background:rgba(3,6,10,.72);backdrop-filter:blur(4px);z-index:90;opacity:0;
  transition:opacity .25s;pointer-events:none}
.drawer-bd.open{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(520px,100%);background:var(--ink-1);
  border-left:1px solid var(--line);z-index:95;transform:translateX(100%);transition:transform .3s cubic-bezier(.2,.7,.3,1);
  overflow-y:auto;padding:26px 28px 44px}
.drawer.open{transform:none}
.drawer-x{position:absolute;top:18px;right:20px;width:32px;height:32px;border-radius:8px;border:1px solid var(--line-2);
  display:grid;place-items:center;color:var(--fg-2)}
.drawer-x:hover{color:var(--fg);background:var(--surf-2)}

/* ---------- 小工具 ---------- */
.kv{display:flex;flex-direction:column;gap:9px;font-size:13px}
.kv div{display:flex;justify-content:space-between;gap:14px;padding-bottom:9px;border-bottom:1px solid var(--line)}
.kv div:last-child{border-bottom:0}
.kv dt,.kv .k{color:var(--fg-3)}
.kv dd,.kv .v{margin:0;font-family:var(--mono);text-align:right;color:var(--fg-2)}
.stack{display:flex;flex-direction:column;gap:16px}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.sp{margin-left:auto}
.empty{padding:44px 20px;text-align:center;color:var(--fg-3);font-size:13.5px}

/* ---------- 语言切换 ---------- */
.langsw{display:inline-flex; align-items:center; border:1px solid var(--line); border-radius:100px;
  overflow:hidden; background:var(--surf); flex:none}
.langsw a{display:block; padding:4px 10px; font-family:var(--mono); font-size:10.5px; letter-spacing:.06em;
  color:var(--fg-3); line-height:1.5; transition:color .15s, background .15s}
.langsw a:hover{color:var(--fg-2)}
.langsw a.on{background:rgba(62,232,200,.14); color:var(--aqua)}
.langsw a + a{border-left:1px solid var(--line)}
@media(max-width:520px){ .langsw a{padding:4px 8px; font-size:10px} }

/* ---------- 英文排版：英文单词比中文长，给几个窄容器松一点 ---------- */
html[lang="en"] .logo-tx{font-size:15px}
html[lang="en"] .eyebrow{letter-spacing:.1em}
html[lang="en"] .kpi .k,
html[lang="en"] .hero-stat .k,
html[lang="en"] .strip .k{letter-spacing:.04em; line-height:1.35}
html[lang="en"] .tag{font-size:10.5px}
html[lang="en"] .tw table th{white-space:normal; line-height:1.3}
html[lang="en"] .fchip{white-space:nowrap}
html[lang="en"] .cnav a{letter-spacing:0}
html[lang="en"] h1,html[lang="en"] h2,html[lang="en"] h3{text-wrap:balance; hyphens:auto}
html[lang="en"] .h-xl{letter-spacing:-.03em; font-size:clamp(2.3rem,5vw,4rem)}
/* 英文比中文长，Hero 正文别铺到右侧粒子阵列底下 */
html[lang="en"] .hero .lede{max-width:48ch}
html[lang="en"] .pagehead .lede{max-width:60ch}
html[lang="en"] .logo-tx i{display:none}   /* 英文下品牌名本身就是 YR AI Cloud，副标题会重复 */
html[lang="en"] .kpi .v small{margin-left:.28em}   /* 中文「12,400张」不用空格，英文要 */