@font-face{font-family:"Abhaya Libre";font-weight:700;font-display:swap;src:url(fonts/abhaya-libre-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:"Abhaya Libre";font-weight:800;font-display:swap;src:url(fonts/abhaya-libre-latin-800-normal.woff2) format("woff2")}
@font-face{font-family:"Questrial";font-weight:400;font-display:swap;src:url(fonts/questrial-latin-400-normal.woff2) format("woff2")}

:root{
  --stone:#e4dcd2;
  --sand:#ceaf83;
  --ink:#292524;
  --ink-2:#5b514a;
  --gold-d:#7a5f2f;
  --paper:#f3eee7;
  --line:#b9ab99;
  --cjk:"PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --serif:"Abhaya Libre",Georgia,"Songti SC","Noto Serif CJK SC",serif;
  --sans:"Questrial",var(--cjk),system-ui,sans-serif;
  --pad:clamp(1.25rem,4vw,3rem);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:5rem}
body{margin:0;background:var(--stone);color:var(--ink);font:400 1.0625rem/1.65 var(--sans);-webkit-font-smoothing:antialiased;font-synthesis:none}
img{display:block;max-width:100%}
a{color:inherit}
h1,h2,h3{font-family:var(--serif);font-weight:800;line-height:1.1;margin:0;text-wrap:balance}
h1{font-size:clamp(2.9rem,6vw,5.4rem);letter-spacing:0}
h2{font-size:clamp(2.1rem,4vw,3.4rem);max-width:22ch;letter-spacing:0}
h3{font-size:1.5rem;font-weight:700;letter-spacing:.005em}
:lang(zh-CN) h1,:lang(zh-CN) h2,:lang(zh-CN) h3{font-family:var(--cjk);text-transform:none;font-weight:800;line-height:1.2;letter-spacing:0}
:lang(zh-CN) h1{font-size:clamp(2.7rem,6vw,5.2rem)}
.hero-copy{display:flex;flex-direction:column;justify-content:space-between}
.hero h1{font-size:clamp(2.2rem,4.2vw,3.8rem);line-height:1.15;margin-top:-.25rem}
:lang(zh-CN) .hero h1{font-size:clamp(2.2rem,4.2vw,3.8rem);line-height:1.25}
:lang(zh-CN) h2{max-width:none;font-size:clamp(2rem,3.9vw,3.2rem)}
:lang(zh-CN) h3{font-size:1.35rem}
p{margin:0}
strong{font-family:var(--serif);font-weight:700}
:lang(zh-CN) strong{font-family:var(--cjk)}
.wrap{max-width:76rem;margin:0 auto;padding:0 var(--pad)}
.stencil{font-family:var(--serif);font-weight:800;letter-spacing:.06em}
.skip{position:absolute;left:-99rem;top:0;background:var(--ink);color:var(--stone);padding:.6rem 1rem;z-index:20}
.skip:focus{left:.5rem;top:.5rem}
:focus-visible{outline:3px solid var(--ink);outline-offset:3px;box-shadow:0 0 0 6px var(--sand)}

/* header */
.top{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:1.25rem;padding:1.1rem var(--pad);background:rgba(228,220,210,.95);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.brand img{height:3rem;width:auto}
.top nav{display:flex;gap:1.4rem;margin-left:auto;font-size:.88rem;letter-spacing:.06em;text-transform:uppercase}
:lang(zh-CN) .top nav{letter-spacing:.02em;text-transform:none;font-size:.95rem}
.top nav a,.langs a{text-decoration:none}
.top nav a:hover,.langs a:hover{text-decoration:underline;text-underline-offset:.3em}
.langs{position:relative;font-size:.88rem}
.langs summary{display:flex;align-items:center;gap:.45rem;cursor:pointer;list-style:none;border:1px solid var(--ink);padding:.4rem .65rem;letter-spacing:.04em}
.langs summary::-webkit-details-marker{display:none}
.langs[open] summary .chev{transform:rotate(180deg)}
.langs ul{position:absolute;right:0;top:calc(100% + .35rem);z-index:20;list-style:none;margin:0;padding:.3rem 0;min-width:9rem;background:var(--stone);border:1px solid var(--ink)}
.langs li a,.langs li span{display:block;padding:.5rem .9rem;white-space:nowrap}
.langs li a:hover{background:rgba(41,37,36,.08);text-decoration:none}
.langs li span{background:var(--ink);color:var(--stone)}
.btn{display:inline-block;background:var(--ink);color:var(--stone);text-decoration:none;padding:.95rem 1.6rem;border:2px solid var(--ink);letter-spacing:.08em;text-transform:uppercase;font-size:.88rem;transition:background .15s,color .15s,border-color .15s}
:lang(zh-CN) .btn{letter-spacing:.04em;text-transform:none;font-size:1rem}
.btn:hover{background:var(--sand);border-color:var(--sand);color:var(--ink)}
.btn-sm{padding:.5rem 1rem;font-size:.8rem}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);border-color:var(--ink);color:var(--stone)}
.btn-light{background:var(--sand);color:var(--ink);border-color:var(--sand)}
.btn-light:hover{background:var(--stone);border-color:var(--stone);color:var(--ink)}

/* hero */
.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:clamp(2rem,5vw,5rem);align-items:stretch;max-width:82rem;margin:0 auto;padding:clamp(3rem,7vw,6rem) var(--pad)}
.kicker{font-size:.8rem;line-height:1.5;letter-spacing:.2em;text-transform:uppercase;color:var(--gold-d);margin-bottom:1.5rem}
:lang(zh-CN) .kicker{letter-spacing:.12em;font-size:.9rem}
.lead{font-size:1.2rem;line-height:1.65;color:var(--ink-2);max-width:40rem;margin-top:1.5rem}
.actions{display:flex;flex-wrap:wrap;gap:.9rem;align-items:center;margin-top:2rem}
.note{font-size:.95rem;color:var(--ink-2);margin-top:1.25rem;max-width:44rem}

.plate-head{display:flex;justify-content:space-between;gap:1rem;align-items:baseline;border-bottom:2px solid var(--ink);padding-bottom:.7rem}
.plate-head strong{font:700 1.2rem/1 var(--serif);letter-spacing:.01em}
:lang(zh-CN) .plate-head strong{font-family:var(--cjk);text-transform:none;letter-spacing:0}
.tier{font-size:.72rem;line-height:1;letter-spacing:.1em;text-transform:uppercase;background:var(--ink);color:var(--sand);padding:.45rem .6rem;white-space:nowrap}
:lang(zh-CN) .tier{letter-spacing:.04em;font-size:.8rem}
.plate dl{margin:0}
.plate dl>div,.portal dl>div{display:grid;grid-template-columns:7.5rem 1fr;gap:.9rem;padding:.8rem 0;border-bottom:1px solid var(--line)}
.plate dt,.portal dt,.grp dt{font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;color:var(--ink-2);padding-top:.25rem}
:lang(zh-CN) .plate dt,:lang(zh-CN) .portal dt,:lang(zh-CN) .grp dt{letter-spacing:.04em;font-size:.85rem}
.plate dd,.portal dd,.grp dd{margin:0;line-height:1.35;font-family:var(--serif);font-weight:700;font-size:1.02rem}
:lang(zh-CN) .plate dd,:lang(zh-CN) .portal dd,:lang(zh-CN) .grp dd{font-family:var(--cjk);font-size:1rem}
.plate dd small,.portal dd small{display:block;font-family:var(--sans);font-weight:400;font-size:.82rem;color:var(--ink-2);margin-top:.2rem}

.extract{margin:0;background:var(--ink);color:var(--stone);border:1px solid var(--sand);padding:1.5rem 1.6rem}
.ex-head{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;padding-bottom:1.1rem;border-bottom:1px solid rgba(206,175,131,.35)}
.ex-label{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:#b9ad9e;margin-bottom:.4rem}
:lang(zh-CN) .ex-label{letter-spacing:.06em;text-transform:none;font-size:.82rem}
.ex-id{font:500 1.4rem/1 ui-monospace,"SF Mono",Menlo,Consolas,monospace;letter-spacing:.06em;color:var(--sand);white-space:nowrap}
.ex-pill{display:inline-flex;align-items:center;gap:.5rem;border:1px solid var(--sand);padding:.4rem .7rem;font-size:.76rem;letter-spacing:.08em;text-transform:uppercase;color:var(--sand);white-space:nowrap}
.ex-pill::before{content:"";width:.5rem;height:.5rem;border-radius:50%;background:var(--sand)}
:lang(zh-CN) .ex-pill{letter-spacing:.04em;text-transform:none;font-size:.85rem}
.ex-title{font:800 1.55rem/1.1 var(--serif);margin:1.2rem 0 .3rem}
:lang(zh-CN) .ex-title{font-family:var(--cjk);font-size:1.35rem}
.extract dl{margin:0}
.extract dl>div{display:grid;grid-template-columns:8rem 1fr;gap:1rem;padding:.95rem 0;border-bottom:1px solid rgba(206,175,131,.25)}
.extract dt{font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:#b9ad9e;padding-top:.35rem}
:lang(zh-CN) .extract dt{letter-spacing:.04em;text-transform:none;font-size:.85rem}
.extract dd{margin:0;font:700 1.15rem/1.3 var(--serif)}
:lang(zh-CN) .extract dd{font-family:var(--cjk);font-size:1.05rem}
.extract .src{display:block;margin-top:.3rem;font:400 .82rem/1.4 ui-monospace,"SF Mono",Menlo,Consolas,monospace;color:var(--sand);text-decoration:none;border-bottom:1px solid transparent;width:fit-content}
.extract .src:hover{border-bottom-color:var(--sand)}
.ex-foot{margin-top:1rem;font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;color:#b9ad9e}
:lang(zh-CN) .ex-foot{letter-spacing:.04em;text-transform:none;font-size:.82rem}

/* bands */
.band{padding:clamp(3.5rem,8vw,7rem) 0}
.band h2{margin-bottom:clamp(2rem,4vw,3.5rem)}
.band-red,.band-blue{background:var(--ink);color:var(--stone)}
.band-red h2,.band-red .num,.band-blue h2,.band-blue .num{color:var(--sand)}
.band-steel{background:#d6ccbf}
.band-sky{background:var(--sand)}
.num{display:block;font-size:3.2rem;line-height:1;margin-bottom:1rem}
.cols3,.steps,.tiers,.coverage,.points{list-style:none;margin:0;padding:0}
.cols3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(1.5rem,3vw,3rem)}
.cols3 li{border-top:2px solid currentColor;padding-top:1.25rem}
.cols3 h3{margin-bottom:.8rem}
.plain li{border-top-color:var(--ink)}
.cols3.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.cols3.four{grid-template-columns:repeat(4,minmax(0,1fr))}
.directions{margin-top:2.5rem;font-size:1.1rem;max-width:46rem;font-family:var(--serif);font-weight:700}
:lang(zh-CN) .directions{font-family:var(--cjk)}

.versus{display:grid;grid-template-columns:1fr 1.25fr;gap:0;border:2px solid var(--ink)}
.versus>div{padding:clamp(1.5rem,3vw,2.5rem)}
.versus .old{background:var(--stone)}
.versus .new{background:var(--paper);border-left:2px solid var(--ink)}
.label{font-size:.78rem;line-height:1;text-transform:uppercase;letter-spacing:.16em;margin-bottom:1.25rem;color:var(--ink-2)}
:lang(zh-CN) .label{letter-spacing:.08em;font-size:.88rem}
.claim{font:700 1.6rem/1.25 var(--serif);text-decoration:line-through;text-decoration-thickness:2px;text-decoration-color:var(--ink);color:var(--ink-2);margin-bottom:.6rem}
:lang(zh-CN) .claim{font-family:var(--cjk)}
.mech{font-size:1.15rem;line-height:1.6}
.result{margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--line);font-family:var(--serif);font-weight:700;font-size:1.05rem}
:lang(zh-CN) .result{font-family:var(--cjk);font-size:1rem}
.new .result{color:var(--gold-d)}

.steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0}
.steps li{padding:0 1.25rem 0 0}
.steps li+li{padding-left:1.25rem;border-left:1px dashed rgba(206,175,131,.5)}
.steps h3{margin-bottom:.7rem;font-size:1.15rem;color:var(--stone)}
.steps p{color:#cfc5b8}

.tiers{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.25rem}
.tiers li{background:var(--paper);color:var(--ink);border:2px solid var(--ink);padding:0 1.5rem 1.5rem}
.tiers li::before{content:"";display:block;height:14px;margin:0 -1.5rem 1.5rem;background:var(--bar)}
.tiers .tier-1{--bar:var(--ink-2)}
.tiers .tier-2{--bar:var(--gold-d)}
.tiers .tier-3{--bar:var(--sand)}
.tiers h3{margin-bottom:.7rem}

.coverage{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.25rem;margin-bottom:2rem}
.coverage li{display:grid;align-content:start;gap:.3rem;background:var(--paper);border:2px solid var(--ink);padding:1.25rem 1.4rem}
.cc{font-size:2.6rem;line-height:1;color:var(--gold-d)}
.coverage strong{font-size:1.2rem}
.coverage small{color:var(--ink-2);font-size:.92rem}

.pass{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(2rem,5vw,5rem);align-items:start}
.pass .kicker{color:var(--ink)}
.pass .lead,.pass .note{color:var(--ink)}
.pass h2{margin-bottom:0}
.points{display:grid;gap:0;border-top:2px solid var(--ink)}
.points li{padding:1.1rem 0 1.1rem 2.2rem;border-bottom:1px solid rgba(41,37,36,.35);position:relative}
.points li::before{content:"";position:absolute;left:0;top:1.6rem;width:1rem;height:1rem;border:2px solid var(--ink)}


.close h2{max-width:20ch}
:lang(zh-CN) .close h2{max-width:none}
.close .lead,.close .note,.band-blue .lead,.band-blue .note{color:#cfc5b8}
.band .wrap>h2+.lead{margin:-1rem 0 2.5rem}
.mail{color:var(--sand)}
footer{background:#1d1917;color:#cfc5b8;padding:3rem 0;font-size:.92rem}
.foot{display:grid;grid-template-columns:1fr 1.4fr;gap:1.5rem 3rem;align-items:center}
.foot-brand{display:flex;flex-wrap:wrap;align-items:center;gap:1.1rem}
.foot-logo{height:4rem;width:auto}
.tag{font:400 .95rem/1.4 var(--sans);color:var(--sand);letter-spacing:.04em;margin-bottom:.6rem}
address{font-style:normal;line-height:1.7}
.sep{grid-column:1/-1;border-top:1px solid rgba(206,175,131,.25);padding-top:1.25rem}

/* preview */
.preview-note{margin:0 0 1.75rem}
.tabs{display:flex;flex-wrap:wrap;gap:.4rem;border-bottom:2px solid var(--ink);margin-bottom:1.5rem}
.tabs button{font:inherit;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;background:transparent;color:var(--ink);border:2px solid var(--ink);border-bottom:0;padding:.7rem 1.2rem;cursor:pointer}
:lang(zh-CN) .tabs button{letter-spacing:.04em;text-transform:none;font-size:.95rem}
.tabs button[aria-selected="true"]{background:var(--ink);color:var(--sand)}
.panel-desc{color:var(--ink-2);max-width:40rem;margin-bottom:1.25rem}
.js [data-panel][hidden]{display:none}
[data-panel]+[data-panel]{margin-top:2.5rem}
.grp{max-width:34rem;background:var(--paper);border:2px solid var(--ink);padding:1.4rem}
.grp-head{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-bottom:1rem;border-bottom:2px solid var(--ink);margin-bottom:1.1rem}
.grp-id{display:flex;align-items:center;gap:.8rem}
.grp-id img{height:2.6rem;width:2.6rem}
.grp-id strong{font-size:1.15rem}
.grp-grid{display:grid;grid-template-columns:1fr 1fr;gap:.9rem 1.2rem;margin:0 0 1.2rem}
.grp-grid div{display:grid;gap:.25rem}
.grp-grid dd{margin:0}
.grp-foot{display:flex;align-items:center;gap:1rem;border-top:1px solid var(--line);padding-top:1rem;font-size:.85rem}
.grp-foot p{flex:1;min-width:0;overflow-wrap:anywhere}
.grp-foot small{color:var(--ink-2)}
.qr{width:4.4rem;height:4.4rem;flex:none;border:1px solid var(--ink)}
.portal{max-width:46rem;background:var(--paper);border:2px solid var(--ink)}
.portal-bar{padding:.6rem 1rem;border-bottom:2px solid var(--ink);background:#d6ccbf;font-size:.8rem;overflow-wrap:anywhere}
.portal-body{padding:1.25rem 1.4rem}
.portal dl{margin:0}
.portal-foot{margin-top:.9rem;font-size:.8rem;color:var(--ink-2)}
.pdf{display:grid;gap:.2rem;margin-top:1.1rem;padding:.9rem 1rem;border:2px dashed var(--ink)}
.pdf small{color:var(--ink-2)}
.embed{position:relative;max-width:46rem;background:var(--ink);padding:1.25rem 1.4rem}
.embed pre{margin:0 0 1rem;overflow-x:auto;color:var(--sand);font:.82rem/1.6 ui-monospace,Menlo,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere}
.embed .btn{background:var(--sand);border-color:var(--sand);color:var(--ink)}
.embed .btn:hover{background:var(--stone);border-color:var(--stone)}

@media (max-width:62rem){
  .top nav{display:none}.top .langs{margin-left:auto}
  .hero{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:2.5rem}
  .steps li:nth-child(odd){padding-left:0;border-left:0}
  .pass{grid-template-columns:1fr}
  .cols3.four{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:44rem){
  body{font-size:1rem}
  .brand img{height:2.2rem}
  .btn-sm{display:none}.top .langs{margin-left:auto}
  .cols3,.cols3.two,.cols3.four,.tiers,.coverage,.versus,.steps,.foot,.grp-grid{grid-template-columns:1fr}
  .versus .new{border-left:0;border-top:2px solid var(--ink)}
  .steps li,.steps li+li{padding:1.25rem 0 0;border-left:0;border-top:1px dashed rgba(206,175,131,.5)}
  .steps li:first-child{border-top:0;padding-top:0}
  .plate dl>div,.extract dl>div{grid-template-columns:1fr;gap:.2rem}
  .ex-head{flex-wrap:wrap}
  .ex-id{font-size:1.2rem}
  .extract{padding:1.25rem 1.2rem}
  .foot-logo{height:3rem}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
}
.close{position:relative;overflow:hidden}
.close::before{content:"";position:absolute;top:50%;right:-8%;width:min(62vw,52rem);aspect-ratio:1;transform:translateY(-50%);background:url(/assets/horizon.webp) center/contain no-repeat;pointer-events:none}
.close .wrap{position:relative}
@media (max-width:44rem){.close::before{opacity:.45;right:-30%}}

.sub{margin:clamp(2rem,4vw,3rem) 0 .5rem;font-size:1.5rem}
.scope{margin:0;max-width:52rem}
.scope>div{display:grid;grid-template-columns:11rem 1fr;gap:1rem;padding:.9rem 0;border-top:1px solid var(--line)}
.scope dt{font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--gold-d)}
:lang(zh-CN) .scope dt{letter-spacing:.06em;font-size:.95rem;text-transform:none}
.scope dd{margin:0}
.faq-list{max-width:52rem}
.faq details{border-top:1px solid var(--ink)}
.faq details:last-child{border-bottom:1px solid var(--ink)}
.faq summary{display:flex;justify-content:space-between;gap:1rem;cursor:pointer;list-style:none;padding:1.1rem 0;font:700 1.2rem/1.3 var(--serif)}
:lang(zh-CN) .faq summary{font-family:var(--cjk)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-weight:400;flex:none}
.faq details[open] summary::after{content:"\2212"}
.faq details p{margin:0;padding:0 0 1.3rem;max-width:44rem}
.paths{list-style:none;margin:0 0 1.5rem;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:1rem}
.paths a{background:rgba(41,37,36,.86);display:flex;flex-direction:column;gap:.5rem;height:100%;padding:1.25rem 1.3rem;border:1px solid var(--sand);color:var(--stone);text-decoration:none}
.paths a:hover{background:rgba(206,175,131,.12)}
.paths strong{font:700 1.25rem/1.25 var(--serif);color:var(--sand)}
:lang(zh-CN) .paths strong{font-family:var(--cjk)}
.paths span{font-size:.95rem}
.extract{position:relative;overflow:hidden}
.extract::after{content:attr(data-mark);position:absolute;right:1.2rem;bottom:.9rem;font:800 3.2rem/1 var(--serif);letter-spacing:.12em;color:rgba(206,175,131,.13);transform:rotate(-8deg);pointer-events:none}
@media (max-width:44rem){.paths{grid-template-columns:1fr}.scope>div{grid-template-columns:1fr;gap:.2rem}}
.close .paths{margin-top:2rem}

.band-steel .num{color:var(--gold-d)}
.band-blue .plain li{border-top-color:var(--sand)}
.band-blue .plain h3{color:var(--sand)}
.page-title{font-size:clamp(2.2rem,4.2vw,3.8rem);line-height:1.15;max-width:22ch;margin-bottom:1.5rem}
:lang(zh-CN) .page-title{line-height:1.25}
.band-blue .btn{background:var(--sand);border-color:var(--sand);color:var(--ink)}
.cols3 li p+p{margin-top:.6rem}
.diagram{margin:0}
.diagram-scroll{overflow-x:auto;background:#f8f6f0;border-radius:4px}
.diagram-scroll:focus-visible{outline:2px solid var(--sand);outline-offset:4px}
.diagram svg{display:block;width:100%;height:auto;font-family:var(--sans)}
.diagram .mono{font-family:ui-monospace,Menlo,Consolas,monospace}
.scroll-hint{display:none;font-size:.85rem;margin:.6rem 0 0}
.diagram-item+.diagram-item{margin-top:clamp(3rem,6vw,5rem)}
.diagram-item h3{margin-bottom:.6rem}
.diagram-item p{max-width:46rem;margin:0 0 1.5rem}
@media (min-width:62.01rem){.narrow-only{display:none}}
@media (max-width:62rem){.wide-only{display:none}.diagram svg{min-width:960px}.scroll-hint{display:block}}