*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,dl,dt,dd,figure,blockquote{margin:0}
ul,ol{list-style:none;padding:0}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit}
[id]{scroll-margin-top:28px}

:root{
  --ink-900:#0B1B2B;
  --ink-800:#122A40;
  --ink-750:#173553;
  --line:#5E748A;
  --line-soft:rgba(94,116,138,.32);
  --line-strong:rgba(94,116,138,.62);
  --mist:#A9C1D6;
  --white:#F4F7FA;
  --brand:#F05A3C;
  --brand-deep:#C73F27;
  --mint:#35C4A0;
  --mint-soft:#8DE3CC;
  --amber:#F2B84B;
  --shell:1240px;
  --gutter:clamp(18px,4.2vw,44px);
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 26px 60px -34px rgba(0,0,0,.92);
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--white);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(1000px 480px at 86% -6%, rgba(53,196,160,.11), transparent 62%),
    radial-gradient(760px 460px at -4% 2%, rgba(240,90,60,.09), transparent 58%),
    repeating-linear-gradient(90deg, rgba(94,116,138,.075) 0 1px, transparent 1px 108px),
    repeating-linear-gradient(0deg, rgba(94,116,138,.05) 0 1px, transparent 1px 108px);
  background-repeat:no-repeat,no-repeat,repeat,repeat;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}

h1,h2,h3,h4{line-height:1.25;letter-spacing:-.02em;font-weight:900;color:var(--white)}
h1{font-size:clamp(32px,5vw,56px)}
h2{font-size:clamp(24px,3.2vw,34px)}
h3{font-size:clamp(18px,2vw,23px);font-weight:800;letter-spacing:-.01em}
h4{font-size:17px;font-weight:800;letter-spacing:0}
p{max-width:70ch}

:focus-visible{outline:2px solid var(--mint-soft);outline-offset:3px;border-radius:6px}
a:focus-visible,button:focus-visible{outline:2px solid var(--mint-soft);outline-offset:3px}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.eyebrow{display:block;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.26em;text-transform:uppercase;color:var(--line)}
.lede{font-size:clamp(16px,1.5vw,18px);line-height:1.8;color:var(--mist);max-width:64ch}
.muted{color:var(--mist)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.skip-link{
  position:fixed;top:-120px;left:clamp(18px,4.2vw,44px);z-index:200;
  padding:12px 20px;border-radius:var(--radius-sm);
  background:var(--brand);color:#fff;font-weight:700;text-decoration:none;
  transition:top .2s ease;
}
.skip-link:focus,.skip-link:focus-visible{top:14px}

/* ============ Header ============ */
.site-header{position:relative;z-index:60;background:linear-gradient(180deg,rgba(11,27,43,.99),rgba(11,27,43,.9));border-bottom:1px solid var(--line-soft)}

.header-strip{border-bottom:1px solid var(--line-soft);background:linear-gradient(90deg,rgba(53,196,160,.12),rgba(53,196,160,.02) 46%,transparent 70%)}
.header-strip__inner{display:flex;align-items:center;justify-content:space-between;gap:18px;padding-block:10px}
.header-strip__motto{
  display:inline-flex;align-items:center;gap:10px;flex-shrink:1;min-width:0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--mist);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.header-strip__motto::before{content:"";width:20px;height:2px;border-radius:2px;background:var(--mint);flex:none}
.header-strip__meta{display:flex;align-items:center;gap:18px;flex:none}

.edition-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:4px 12px;border-radius:999px;
  border:1px solid rgba(242,184,75,.45);background:rgba(242,184,75,.08);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--amber);white-space:nowrap;
}
.edition-tag__dot{width:6px;height:6px;border-radius:50%;background:var(--amber);box-shadow:0 0 0 3px rgba(242,184,75,.18);flex:none}

.mini-link{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--white);text-decoration:none;
  border-bottom:1px solid rgba(240,90,60,.6);padding-bottom:2px;
  transition:color .18s ease,border-color .18s ease;
}
.mini-link::after{content:"\2192";font-size:11px;color:var(--brand);transition:transform .18s ease}
.mini-link:hover,.mini-link:focus-visible{color:var(--brand);border-color:var(--brand)}
.mini-link:hover::after{transform:translateX(3px)}

.masthead{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px;
  padding-block:20px 16px;
}
.masthead__ear{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--line);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.masthead__ear--end{text-align:right}

.wordmark{
  display:grid;justify-items:center;gap:8px;position:relative;
  padding-bottom:11px;text-decoration:none;color:var(--white);
}
.wordmark::after{
  content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);
  width:34px;height:3px;border-radius:3px;background:var(--brand);
  transition:width .26s cubic-bezier(.22,.61,.36,1);
}
.wordmark:hover::after,.wordmark:focus-visible::after{width:78px}
.wordmark__cn{font-size:clamp(30px,4.2vw,46px);font-weight:900;letter-spacing:-.03em;line-height:1;color:var(--white)}
.wordmark__en{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.46em;text-indent:.46em;color:var(--line);line-height:1}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:10px 14px;border:1px solid var(--line-soft);border-radius:var(--radius-sm);
  background:rgba(18,42,64,.7);color:var(--mist);
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.14em;
  transition:border-color .18s ease,color .18s ease,background-color .18s ease;
}
.nav-toggle:hover{border-color:var(--mint);color:var(--mint-soft)}
.nav-toggle[aria-expanded="true"]{border-color:var(--brand);color:var(--white);background:rgba(240,90,60,.14)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:2px;border-radius:2px;background:currentColor;transition:transform .22s ease,opacity .22s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__label{line-height:1}

.site-nav{border-top:1px solid var(--line-soft);background:rgba(18,42,64,.6)}
.site-nav__inner{display:flex;align-items:center;justify-content:center;gap:clamp(4px,1.6vw,20px);min-height:52px}
.site-nav__link{
  position:relative;display:inline-flex;align-items:center;height:52px;
  padding:0 clamp(8px,1.2vw,16px);
  color:var(--mist);text-decoration:none;font-size:15px;font-weight:500;letter-spacing:.06em;
  transition:color .18s ease;
}
.site-nav__link::after{
  content:"";position:absolute;left:50%;bottom:9px;transform:translateX(-50%) scaleX(0);
  width:calc(100% - 24px);max-width:40px;height:2px;border-radius:2px;background:var(--brand);
  transition:transform .22s cubic-bezier(.22,.61,.36,1);
}
.site-nav__link:hover,.site-nav__link:focus-visible{color:var(--white)}
.site-nav__link:hover::after{transform:translateX(-50%) scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--white)}
.site-nav__link[aria-current="page"]::after{transform:translateX(-50%) scaleX(1)}

/* ============ Footer ============ */
.site-footer{
  position:relative;margin-top:clamp(40px,6vw,88px);
  border-top:1px solid var(--line-soft);
  background:linear-gradient(180deg,#0D2134 0%,#0B1B2B 72%);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;
  width:min(320px,58%);height:3px;
  background:linear-gradient(90deg,var(--mint),var(--mint-soft) 34%,var(--brand));
  border-radius:0 0 3px 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.55fr 1fr 1.25fr 1fr;
  gap:clamp(24px,3vw,40px) clamp(20px,2.6vw,36px);
  padding-block:clamp(38px,5vw,56px) clamp(28px,3.4vw,44px);
}
.footer-brand__mark{
  display:inline-flex;align-items:center;gap:9px;
  font-size:21px;font-weight:900;letter-spacing:-.02em;
  color:var(--white);text-decoration:none;
}
.footer-brand__mark::before{content:"";width:10px;height:10px;border-radius:3px;background:var(--brand);flex:none}
.footer-brand__mark:hover{color:var(--mint-soft)}
.footer-brand__note{margin-top:14px;font-size:14px;line-height:1.8;color:var(--mist);max-width:34ch}
.footer-brand__code{
  margin-top:16px;font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  color:var(--line);
}
.footer-col__title{
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.24em;
  text-transform:uppercase;color:var(--line);margin-bottom:14px;
}
.footer-col__hint{margin-top:14px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--line)}
.footer-list{display:grid;gap:2px}
.footer-list a{
  display:inline-block;padding-block:5px;
  color:var(--mist);text-decoration:none;font-size:14.5px;
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer-list a:hover,.footer-list a:focus-visible{color:var(--white);border-color:rgba(240,90,60,.7)}
.footer-contact dt{
  margin-top:14px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--line);
}
.footer-contact dt:first-child{margin-top:0}
.footer-contact dd{margin-top:4px;font-size:14px;line-height:1.65;color:var(--mist);word-break:break-word}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;
  padding-block:20px;border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--line);
}
.footer-base__copy,.footer-base__icp{max-width:none}
.footer-base__icp{color:var(--mist)}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 22px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:.02em;text-decoration:none;
  transition:transform .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--brand);color:#fff;box-shadow:0 14px 28px -16px rgba(240,90,60,.95)}
.btn--primary:hover{background:var(--brand-deep)}
.btn--ghost{border-color:var(--line-soft);background:rgba(18,42,64,.55);color:var(--white)}
.btn--ghost:hover{border-color:var(--mint);color:var(--mint-soft)}
.btn__arrow{font-family:var(--font-mono);font-size:12px;opacity:.85}

/* ============ Plates / chips ============ */
.plate{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 11px;border-radius:6px;
  border:1px solid var(--line-soft);background:rgba(11,27,43,.6);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--mist);
}
.plate--mint{color:var(--mint-soft);border-color:rgba(53,196,160,.5);background:rgba(53,196,160,.1)}
.plate--amber{color:var(--amber);border-color:rgba(242,184,75,.45);background:rgba(242,184,75,.08)}
.plate--brand{color:var(--brand);border-color:rgba(240,90,60,.5);background:rgba(240,90,60,.1)}

.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.filter-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:999px;
  border:1px solid var(--line-soft);background:rgba(18,42,64,.55);
  color:var(--mist);font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;
  transition:background-color .18s ease,border-color .18s ease,color .18s ease;
}
.filter-chip:hover{border-color:var(--line-strong);color:var(--white)}
.filter-chip[aria-pressed="true"],.filter-chip.is-active{
  background:rgba(53,196,160,.14);border-color:var(--mint);color:var(--mint-soft);
}
.filter-chip__count{font-size:11px;opacity:.7}
[data-filter-item][hidden]{display:none !important}

/* ============ Breadcrumbs / prose ============ */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-block:18px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;color:var(--line);
}
.breadcrumbs li{display:inline-flex;align-items:center;gap:8px;max-width:none}
.breadcrumbs li + li::before{content:"/";color:rgba(94,116,138,.55)}
.breadcrumbs a{color:var(--mist);text-decoration:none;transition:color .18s ease}
.breadcrumbs a:hover,.breadcrumbs a:focus-visible{color:var(--mint-soft)}
.breadcrumbs [aria-current="page"]{color:var(--white)}

.prose{max-width:760px}
.prose > * + *{margin-top:1.15em}
.prose h2{margin-top:2em}
.prose h3{margin-top:1.7em}
.prose ul{display:grid;gap:.55em}
.prose ul li{position:relative;padding-left:22px;max-width:none}
.prose ul li::before{content:"";position:absolute;left:0;top:.78em;width:9px;height:2px;border-radius:2px;background:var(--brand)}
.prose a{color:var(--mint-soft);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--white)}

/* ============ Layout / cards / media ============ */
.section{padding-block:clamp(30px,4.6vw,68px)}
.section--tight{padding-block:clamp(20px,3vw,38px)}
.section-head{display:grid;gap:10px;margin-bottom:clamp(18px,2.4vw,28px)}

.grid{display:grid;gap:clamp(16px,2.2vw,26px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

.card{
  position:relative;
  background:linear-gradient(180deg,rgba(18,42,64,.94),rgba(13,32,51,.94));
  border:1px solid var(--line-soft);border-radius:var(--radius);
  padding:clamp(18px,2.4vw,28px);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow)}

.layout-rail{
  display:grid;grid-template-columns:minmax(0,1fr) 264px;
  gap:clamp(22px,3.4vw,52px);align-items:start;
  padding-block:clamp(24px,3.6vw,52px);
}
.index-rail{
  position:sticky;top:24px;
  display:grid;gap:4px;
  padding:20px 16px;
  border:1px solid var(--line-soft);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(18,42,64,.92),rgba(11,27,43,.78));
  box-shadow:var(--shadow);
}
.index-rail__title{
  font-family:var(--font-mono);font-size:10.5px;font-weight:500;letter-spacing:.24em;
  text-transform:uppercase;color:var(--line);
  padding:0 10px;margin-bottom:10px;
}
.index-rail__link{
  display:flex;align-items:baseline;gap:10px;
  padding:9px 10px 9px 12px;
  border-left:2px solid transparent;border-radius:8px;
  color:var(--mist);text-decoration:none;font-size:14.5px;line-height:1.5;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.index-rail__link:hover{background:rgba(53,196,160,.09);color:var(--white)}
.index-rail__link.is-active{background:rgba(240,90,60,.13);border-left-color:var(--brand);color:var(--white)}
.index-rail__num{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--brand);flex:none}

.media-frame{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--line-soft);border-radius:var(--radius);
  background:
    radial-gradient(120% 120% at 18% 0%, rgba(53,196,160,.16), transparent 62%),
    repeating-linear-gradient(45deg, rgba(94,116,138,.14) 0 2px, transparent 2px 11px),
    var(--ink-800);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame__tag{
  position:absolute;top:12px;left:12px;
  padding:5px 10px;border-radius:6px;
  background:rgba(11,27,43,.82);border:1px solid var(--line-soft);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--mint-soft);
}
.media-frame__caption{
  position:absolute;left:12px;right:12px;bottom:12px;
  padding:9px 12px;border-radius:8px;
  background:rgba(11,27,43,.84);border:1px solid rgba(94,116,138,.28);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;line-height:1.6;color:var(--mist);
}

.copy-btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 11px;border-radius:8px;
  border:1px dashed var(--line-soft);background:rgba(11,27,43,.55);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);
  transition:border-color .18s ease,color .18s ease;
}
.copy-btn:hover,.copy-btn:focus-visible{border-color:var(--mint);color:var(--mint-soft)}
.copy-btn[data-copied]{border-color:var(--mint);color:var(--mint-soft)}

@media (prefers-reduced-motion: no-preference){
  .rise{animation:rise .6s cubic-bezier(.22,.61,.36,1) both;animation-delay:calc(var(--rise-delay,0) * 90ms)}
  @keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
}

/* ============ Responsive ============ */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:900px){
  .layout-rail{grid-template-columns:minmax(0,1fr)}
  .index-rail{position:static;order:-1}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:860px){
  .nav-toggle{display:inline-flex}
  .masthead{grid-template-columns:1fr auto;gap:12px;padding-block:16px 14px}
  .masthead__ear{display:none}
  .wordmark{justify-items:start;padding-bottom:8px}
  .wordmark::after{left:0;transform:none;width:26px}
  .wordmark:hover::after,.wordmark:focus-visible::after{width:64px}

  .site-nav{
    display:none;position:absolute;left:0;right:0;top:100%;
    border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);
    background:var(--ink-800);
    box-shadow:0 30px 46px -22px rgba(0,0,0,.85);
  }
  .site-nav[data-open="true"]{display:block}
  .site-nav__inner{flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;padding-block:8px;min-height:0}
  .site-nav__link{
    height:auto;justify-content:flex-start;
    padding:14px 24px 14px 26px;
    font-size:16px;border-bottom:1px solid rgba(94,116,138,.16);
  }
  .site-nav__link:last-child{border-bottom:0}
  .site-nav__link::after{
    left:11px;top:50%;bottom:auto;max-width:none;
    width:3px;height:20px;
    transform:translateY(-50%) scaleY(0);
    transition:transform .22s cubic-bezier(.22,.61,.36,1);
  }
  .site-nav__link:hover::after,.site-nav__link:focus-visible::after,
  .site-nav__link[aria-current="page"]::after{transform:translateY(-50%) scaleY(1)}
}

@media (max-width:760px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .header-strip__inner{font-size:11.5px;gap:12px;padding-block:9px}
  .header-strip__motto{font-size:11px;letter-spacing:.1em}
  .edition-tag{display:none}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:30px}
  .footer-brand__note{max-width:46ch}
  .footer-base{justify-content:flex-start}
}

@media (max-width:420px){
  .nav-toggle__label{display:none}
  .footer-contact dd{font-size:13.5px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
}