:root{
  --ink:#15202a;
  --muted:#63707d;
  --paper:#f7f8fa;
  --panel:#fff;
  --line:#dce2e8;
  --accent:#246bfd;
  --accent2:#7d9fff;
  --radius:22px;
  --shadow:0 24px 70px rgba(18,31,47,.12);
  --max:1180px;
  color-scheme:light
}
*{
  box-sizing:border-box
}
html{
  scroll-behavior:smooth
}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.72;
  -webkit-font-smoothing:antialiased
}
img{
  display:block;
  max-width:100%;
  height:auto
}
a{
  color:inherit;
  text-decoration:none
}
button{
  font:inherit
}
p{
  margin:.65em 0
}
h1,h2,h3{
  margin:0;
  line-height:1.16;
  letter-spacing:-.035em
}
h1{
  font-size:clamp(2.35rem,5.8vw,5.75rem)
}
h2{
  font-size:clamp(1.55rem,3.1vw,2.7rem)
}
h3{
  font-size:1.15rem
}
ul,ol{
  padding-left:1.25rem
}
.shell{
  width:min(calc(100% - 40px),var(--max));
  margin-inline:auto
}
.skip-link{
  position:fixed;
  left:12px;
  top:-80px;
  z-index:999;
  background:#fff;
  color:#111;
  padding:10px 14px;
  border-radius:8px
}
.skip-link:focus{
  top:12px
}
.mobile-toggle{
  display:none;
  border:1px solid var(--line);
  background:var(--panel);
  border-radius:999px;
  padding:9px 13px;
  color:inherit
}
.mobile-nav{
  display:none
}
.mobile-nav[hidden]{
  display:none
}
.eyebrow{
  text-transform:uppercase;
  letter-spacing:.18em;
  font-size:.72rem;
  font-weight:800;
  color:var(--accent)
}
.lead{
  font-size:clamp(1rem,1.4vw,1.2rem);
  color:var(--muted);
  max-width:68ch
}
.button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  padding:0 18px;
  border-radius:999px;
  font-weight:750;
  border:1px solid transparent;
  transition:.2s ease
}
.button:hover{
  transform:translateY(-2px)
}
.button-primary{
  background:var(--accent);
  color:#fff
}
.button-ghost{
  border-color:var(--line);
  background:color-mix(in srgb,var(--panel) 82%,transparent)
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:6px 10px;
  border-radius:999px;
  background:color-mix(in srgb,var(--accent) 10%,transparent);
  color:var(--accent);
  font-size:.78rem;
  font-weight:750
}
.site-header a:focus-visible,.site-footer a:focus-visible,.button:focus-visible,.mobile-toggle:focus-visible{
  outline:3px solid color-mix(in srgb,var(--accent) 45%,transparent);
  outline-offset:3px
}
.section-head{
  display:flex;
  align-items:end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:28px
}
.section-head p{
  max-width:55ch;
  color:var(--muted)
}
.card-link{
  font-weight:800;
  color:var(--accent)
}
.card-link::after{
  content:" →"
}
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
  font-size:.84rem;
  color:var(--muted)
}
.breadcrumbs span{
  opacity:.55
}
.page-hero{
  padding:72px 0 40px
}
.page-hero h1{
  font-size:clamp(2.2rem,5vw,4.6rem);
  max-width:15ch;
  margin-top:16px
}
.page-hero .lead{
  margin-top:20px
}
.article-figure{
  margin:28px 0;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--panel)
}
.article-figure img{
  width:100%;
  aspect-ratio:16/8;
  object-fit:cover
}
.article-figure figcaption{
  padding:11px 15px;
  color:var(--muted);
  font-size:.82rem
}
.article-copy p{
  color:color-mix(in srgb,var(--ink) 80%,var(--muted));
  font-size:1.02rem
}
.article-copy h2{
  margin:42px 0 14px;
  font-size:clamp(1.35rem,2.7vw,2.15rem)
}
.article-copy table{
  width:100%;
  border-collapse:collapse;
  margin:20px 0
}
.article-copy th,.article-copy td{
  padding:13px;
  border:1px solid var(--line);
  text-align:left
}
.article-copy li+li{
  margin-top:8px
}
.article-note{
  margin:26px 0;
  padding:20px 22px;
  border-left:4px solid var(--accent);
  background:color-mix(in srgb,var(--accent) 7%,var(--panel));
  border-radius:0 16px 16px 0
}
.article-close{
  margin-top:42px;
  padding:24px;
  border-radius:var(--radius);
  background:var(--ink);
  color:#fff
}
.article-close p{
  color:rgba(255,255,255,.82)
}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
  margin-top:28px
}
.related-card{
  padding:19px;
  border:1px solid var(--line);
  border-radius:18px;
  background:var(--panel)
}
.related-card span{
  display:block;
  color:var(--accent);
  font-size:.74rem;
  font-weight:800;
  margin-bottom:8px
}
.info-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:28px;
  padding:30px 0 80px
}
.info-panel{
  padding:30px;
  border-radius:var(--radius);
  background:var(--panel);
  border:1px solid var(--line)
}
.info-panel h2{
  font-size:1.5rem;
  margin-bottom:14px
}
.policy-list{
  display:grid;
  gap:12px;
  padding:0;
  list-style:none
}
.policy-list li{
  padding:14px 0;
  border-bottom:1px solid var(--line)
}
.site-footer{
  margin-top:70px;
  padding:48px 0 26px;
  border-top:1px solid var(--line)
}
.footer-grid{
  display:grid;
  grid-template-columns:1.25fr repeat(2,.75fr);
  gap:28px
}
.footer-grid h2{
  font-size:1rem;
  margin-bottom:12px
}
.footer-grid a{
  display:block;
  color:var(--muted);
  margin:7px 0
}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:20px;
  border-top:1px solid var(--line);
  margin-top:30px;
  padding-top:20px;
  color:var(--muted);
  font-size:.82rem
}
.error-page{
  min-height:70vh;
  display:grid;
  place-items:center;
  text-align:center;
  padding:70px 20px
}
.error-page strong{
  font-size:clamp(6rem,20vw,14rem);
  line-height:.8;
  color:color-mix(in srgb,var(--accent) 22%,transparent)
}
@media(max-width:820px){
  .shell{
    width:min(calc(100% - 28px),var(--max))
  }
  .desktop-nav{
    display:none!important
  }
  .mobile-toggle{
    display:inline-flex
  }
  .mobile-nav{
    position:absolute;
    left:14px;
    right:14px;
    top:calc(100% + 8px);
    z-index:40;
    padding:12px;
    border-radius:18px;
    background:var(--panel);
    border:1px solid var(--line);
    box-shadow:var(--shadow)
  }
  .mobile-nav:not([hidden]){
    display:grid
  }
  .mobile-nav a{
    padding:11px 12px;
    border-radius:10px
  }
  .mobile-nav a:hover{
    background:color-mix(in srgb,var(--accent) 8%,transparent)
  }
  .site-header{
    position:relative
  }
  .section-head{
    display:block
  }
  .related-grid,.info-grid,.footer-grid{
    grid-template-columns:1fr
  }
  .footer-bottom{
    display:block
  }
  .page-hero{
    padding-top:48px
  }
  .article-copy{
    font-size:.98rem
  }
}
@media(prefers-reduced-motion:reduce){
  *{
    scroll-behavior:auto!important;
    transition:none!important
  }
}
:root{
  --ink:#e6f4f2;
  --muted:#91aaa7;
  --paper:#071b1d;
  --panel:#0d2729;
  --line:#204043;
  --accent:#52e0bb;
  --accent2:#f0c76c;
  --radius:18px;
  --shadow:0 30px 80px rgba(0,0,0,.32);
  color-scheme:dark
}
body{
  background:radial-gradient(circle at 70% 0,#123a3b,transparent 34%),var(--paper);
  color:var(--ink)
}
.split-header{
  padding:20px 0;
  border-bottom:1px solid var(--line)
}
.split-nav{
  display:flex;
  align-items:center;
  justify-content:space-between
}
.split-brand{
  font:900 1rem ui-monospace,monospace;
  letter-spacing:.08em
}
.split-nav .desktop-nav{
  display:flex;
  gap:24px;
  color:var(--muted);
  font-size:.84rem
}
.split-nav .desktop-nav a:hover{
  color:var(--ink)
}
.split-hero{
  display:grid;
  grid-template-columns:1fr 1fr;
  min-height:680px;
  border-bottom:1px solid var(--line)
}
.split-copy{
  padding:100px max(24px,6vw) 70px max(20px,calc((100vw - var(--max))/2));
  border-right:1px solid var(--line)
}
.split-copy .lead{
  margin:25px 0
}
.split-visual{
  padding:70px max(20px,calc((100vw - var(--max))/2)) 70px 5vw;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
  align-content:center
}
.metric-block{
  min-height:150px;
  padding:22px;
  border:1px solid var(--line);
  border-radius:16px;
  background:linear-gradient(145deg,rgba(82,224,187,.08),transparent)
}
.metric-block:nth-child(1){
  grid-column:span 2;
  min-height:230px
}
.metric-line{
  height:80px;
  margin-top:24px;
  background:linear-gradient(135deg,transparent 0 10%,var(--accent) 11% 12%,transparent 13% 28%,var(--accent2) 29% 30%,transparent 31% 50%,var(--accent) 51% 52%,transparent 53%);
  clip-path:polygon(0 75%,18% 42%,35% 62%,57% 20%,75% 52%,100% 12%,100% 100%,0 100%);
  opacity:.8
}
.split-bands{
  padding:70px 0
}
.compare-band{
  display:grid;
  grid-template-columns:70px 1fr 1.1fr auto;
  gap:24px;
  align-items:center;
  padding:24px 0;
  border-top:1px solid var(--line)
}
.compare-band:last-child{
  border-bottom:1px solid var(--line)
}
.compare-band b{
  font:800 .76rem ui-monospace,monospace;
  color:var(--accent)
}
.compare-band p{
  color:var(--muted)
}
.analysis-notes{
  padding:50px 0 90px
}
.analysis-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:18px
}
.analysis-card{
  padding:28px;
  border:1px solid var(--line);
  border-radius:18px;
  background:rgba(13,39,41,.7)
}
.analysis-card h3{
  font-size:1.35rem;
  margin:14px 0
}
.analysis-card p{
  color:var(--muted)
}
.split-page{
  padding-bottom:90px
}
.analysis-page-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) 310px;
  gap:32px
}
.analysis-main{
  padding:clamp(22px,5vw,52px);
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:20px
}
.analysis-side{
  align-self:start;
  position:sticky;
  top:24px;
  padding:22px;
  border:1px solid var(--line);
  border-radius:18px
}
.analysis-side a{
  display:block;
  padding:10px 0;
  color:var(--muted)
}
.split .article-close{
  background:var(--accent);
  color:#05211c
}
.split .article-close p{
  color:#123f37
}
.split .article-figure{
  background:#071b1d
}
@media(max-width:900px){
  .split-hero{
    grid-template-columns:1fr;
    min-height:0
  }
  .split-copy{
    border-right:0;
    border-bottom:1px solid var(--line);
    padding:70px 20px
  }
  .split-visual{
    padding:50px 20px
  }
  .compare-band{
    grid-template-columns:50px 1fr
  }
  .compare-band p,.compare-band .card-link{
    grid-column:2
  }
  .analysis-page-grid{
    grid-template-columns:1fr
  }
  .analysis-side{
    position:static
  }
}
@media(max-width:560px){
  .split-visual{
    grid-template-columns:1fr
  }
  .metric-block:nth-child(1){
    grid-column:auto
  }
  .analysis-grid{
    grid-template-columns:1fr
  }
}
.home-expanded{
  padding-top:22px
}
.home-expanded section,.home-expanded aside{
  scroll-margin-top:90px
}
.home-expanded h2{
  max-width:20ch
}
.home-expanded h3{
  letter-spacing:-.02em
}
.home-expanded p,.home-expanded li{
  color:var(--muted)
}
.software-topic{
  margin-top:24px;
  padding-top:18px;
  border-top:1px solid var(--line)
}
.software-topic h3{
  font-size:1.05rem;
  margin-bottom:7px
}
.software-topic p{
  margin:0
}
.software-topic strong{
  color:var(--ink)
}
.home-expanded details summary{
  cursor:pointer;
  font-weight:800;
  list-style:none
}
.home-expanded details summary::-webkit-details-marker{
  display:none
}
.home-expanded details summary::after{
  content:"＋";
  float:right;
  color:var(--accent)
}
.home-expanded details[open] summary::after{
  content:"－"
}
.home-expanded details p{
  margin:12px 0 0
}
.split-definition-grid{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:45px;
  padding:75px 0
}
.split-definition h2,.split-scenarios h2{
  margin:12px 0 24px
}
.split-definition p{
  font-size:1.08rem
}
.split-scene{
  padding:18px 0;
  border-top:1px solid var(--line)
}
.split-scene b{
  color:var(--accent);
  font:.75rem ui-monospace,monospace
}
.split-scene h3{
  margin:8px 0
}
.split-capability-band{
  padding:65px 0;
  border-block:1px solid var(--line);
  background:rgba(13,39,41,.55)
}
.split-capability{
  display:grid;
  grid-template-columns:90px 220px 1fr;
  padding:22px 0;
  border-top:1px solid var(--line)
}
.split-capability b{
  color:var(--accent)
}
.split-capability p{
  margin:0
}
.split-method-grid{
  display:grid;
  grid-template-columns:1.25fr .75fr;
  gap:42px;
  padding:70px 0
}
.split-method-grid h2{
  margin:10px 0 22px
}
.split-method{
  display:grid;
  grid-template-columns:70px 190px 1fr;
  padding:18px 0;
  border-top:1px dashed var(--accent)
}
.split-method b{
  color:var(--accent)
}
.split-method p{
  margin:0
}
.split-boundary{
  padding:28px;
  border:1px solid var(--line);
  border-radius:18px;
  align-self:start
}
.split-boundary h2{
  font-size:1.5rem
}
.split-faq{
  padding:20px 0 90px
}
.split-faq-item{
  padding:19px 0;
  border-top:1px solid var(--line)
}
@media(max-width:820px){
  .split-definition-grid,.split-method-grid{
    grid-template-columns:1fr
  }
  .split-capability,.split-method{
    grid-template-columns:52px 1fr
  }
  .split-capability p,.split-method p{
    grid-column:2
  }
}
.legal-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:18px;
  padding-bottom:28px
}
.legal-support{
  padding:22px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--panel)
}
@media(max-width:760px){
  .legal-grid{
    grid-template-columns:1fr
  }
}