:root{
  --night:#0A1F19;
  --night-2:#10291F;
  --paper:#F1E9D8;
  --ink:#1A1512;
  --chalk:#E8F1EA;
  --cyan:#33E6C0;
  --signal:#FF6A2B;
  --warm-gray:#C7BFB0;
  --moss:#1E3A2E;
  --amber:#F2B23C;
  --slate:#5C7A6B;
  --mist:#9FB3A8;

  --font-display:"Helvetica Neue","Arial Narrow","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --wrap:1240px;
  --gutter:clamp(18px,4vw,48px);
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video,canvas{display:block;max-width:100%;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;padding:0;cursor:pointer;}
a{color:inherit;text-decoration:none;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;}

@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth;}
}

body{
  min-height:100vh;
  display:flex;
  flex-direction:column;
  background-color:var(--night);
  background-image:radial-gradient(rgba(51,230,192,.055) 1px,transparent 1.2px);
  background-size:22px 22px;
  color:var(--chalk);
  font-family:var(--font-body);
  font-size:18px;
  line-height:1.7;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

#main-content{flex:1 0 auto;scroll-margin-top:clamp(96px,16vh,168px);}

/* ---------- 排版原子 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(2.6rem,7vw,6rem);
  line-height:.95;
  letter-spacing:-.02em;
  text-wrap:balance;
}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
}
.label{
  font-size:12px;
  letter-spacing:.18em;
  font-weight:500;
  color:var(--mist);
  text-transform:uppercase;
}

/* ---------- 容器 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(40px,6vw,88px);}
.prose{max-width:34em;}
.prose p + p{margin-top:1.2em;}
.grid{display:grid;gap:clamp(16px,2.4vw,32px);}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55em;
  padding:.8em 1.5em;
  font-size:18px;
  font-weight:700;
  line-height:1.1;
  letter-spacing:.01em;
  text-align:center;
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.btn--signal{
  color:var(--night);
  background:linear-gradient(225deg,transparent 0 13px,var(--signal) 13px);
}
.btn--signal:hover{background:linear-gradient(225deg,transparent 0 13px,var(--amber) 13px);}
.btn--ghost{
  color:var(--chalk);
  background:transparent;
  border:1px solid var(--moss);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);}

/* ---------- 面板 / 标签 / 图片容器 ---------- */
.panel{
  position:relative;
  padding:clamp(20px,3vw,32px);
  background:var(--night-2);
  box-shadow:inset 0 0 0 1px var(--moss);
  clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,0 100%);
}
.panel--paper{
  background:var(--paper);
  color:var(--ink);
  box-shadow:inset 0 0 0 1px rgba(26,21,18,.18);
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  padding:.35em .7em;
  background:var(--warm-gray);
  color:var(--ink);
  font-size:12px;
  font-weight:500;
  letter-spacing:.18em;
}
.tag--live{background:var(--signal);color:var(--night);font-weight:700;}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--night-2);
  box-shadow:inset 0 0 0 1px var(--moss);
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,0 100%);
}
.media-frame[data-ratio="16x9"]{aspect-ratio:16/9;}
.media-frame[data-ratio="4x3"]{aspect-ratio:4/3;}
.media-frame[data-ratio="3x2"]{aspect-ratio:3/2;}
.media-frame[data-ratio="1x1"]{aspect-ratio:1/1;}
.media-frame__img{width:100%;height:100%;object-fit:cover;}
.media-frame__ph{
  position:absolute;
  inset:0;
  background:
    repeating-linear-gradient(-45deg,rgba(51,230,192,.09) 0 1px,transparent 1px 20px),
    radial-gradient(circle at 72% 28%,rgba(255,106,43,.18),transparent 62%);
}
.media-frame__caption{
  display:block;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--mist);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-block:18px;}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5em;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--mist);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:.5em;}
.breadcrumb__link{color:var(--mist);transition:color .16s var(--ease);}
.breadcrumb__link:hover{color:var(--cyan);}
.breadcrumb__sep{color:var(--moss);}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  padding:.7em 1.1em;
  background:var(--cyan);
  color:var(--night);
  font-size:14px;
  font-weight:700;
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0);}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:linear-gradient(180deg,#0E251C 0%,#0A1F19 100%);
  border-bottom:1px solid var(--moss);
}
.site-header__rail{
  display:flex;
  align-items:center;
  gap:14px;
  max-height:44px;
  overflow:hidden;
  padding:6px var(--gutter);
  border-bottom:1px solid var(--moss);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--mist);
  transition:max-height .22s var(--ease),opacity .22s var(--ease),padding .22s var(--ease);
}
.rail__tag{color:var(--cyan);font-weight:500;white-space:nowrap;}
.rail__ticks{
  flex:1 1 auto;
  height:1px;
  min-width:20px;
  background:repeating-linear-gradient(90deg,var(--moss) 0 6px,transparent 6px 14px);
}
.rail__meta{white-space:nowrap;font-family:var(--font-mono);letter-spacing:.12em;}
.site-header[data-compact] .site-header__rail{
  max-height:0;
  padding-block:0;
  opacity:0;
  border-bottom-color:transparent;
}

.site-header__inner{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding:22px var(--gutter) 16px;
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  grid-template-areas:
    "mast mast mast"
    "meter nav cta";
  align-items:center;
  gap:10px 20px;
  transition:padding .24s var(--ease),gap .24s var(--ease);
}

.masthead{
  grid-area:mast;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:4px;
  padding-block:2px 12px;
  transition:padding .24s var(--ease);
}
.masthead__eyebrow{
  font-size:12px;
  letter-spacing:.34em;
  text-indent:.34em;
  color:var(--mist);
  text-transform:uppercase;
}
.masthead__brand{display:inline-flex;align-items:baseline;}
.masthead__mark{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(2.6rem,7vw,6rem);
  line-height:.95;
  letter-spacing:-.02em;
  color:var(--chalk);
  transition:font-size .24s var(--ease);
}
.masthead__meta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  color:var(--slate);
}
.header-meter{
  grid-area:meter;
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--mist);
  opacity:0;
  transition:opacity .2s var(--ease);
}
.site-header[data-compact] .header-meter{opacity:1;}
.header-meter__track{
  display:block;
  width:clamp(56px,9vw,120px);
  height:2px;
  background:var(--moss);
  overflow:hidden;
}
.header-meter__bar{
  display:block;
  height:100%;
  width:0%;
  background:var(--cyan);
  transition:width .12s linear;
}
.header-meter__num{min-width:3ch;color:var(--cyan);}

.site-nav{grid-area:nav;min-width:0;}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:clamp(8px,1.8vw,26px);
}
.site-nav__item{display:flex;}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:.45em;
  padding:.55em 0;
  font-size:14px;
  font-weight:500;
  color:var(--warm-gray);
  border-bottom:2px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
  white-space:nowrap;
}
.nav-link:hover{color:var(--chalk);}
.nav-link__index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
  opacity:.75;
  transition:color .16s var(--ease),opacity .16s var(--ease);
}
.nav-link:hover .nav-link__index{color:var(--cyan);opacity:1;}
.nav-link[aria-current="page"]{color:var(--cyan);border-bottom-color:var(--cyan);}
.nav-link[aria-current="page"] .nav-link__index{color:var(--cyan);opacity:1;}

.header-cta{grid-area:cta;justify-self:end;font-size:18px;}
.header-cta::after{
  content:"";
  width:7px;
  height:7px;
  flex:none;
  border-top:2px solid currentColor;
  border-right:2px solid currentColor;
  transform:rotate(45deg);
}

.nav-toggle{
  display:none;
  grid-area:toggle;
  width:46px;
  height:46px;
  place-items:center;
  border:1px solid var(--moss);
  color:var(--chalk);
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);}
.nav-toggle__bars{position:relative;display:block;width:20px;height:14px;}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:20px;
  height:2px;
  background:currentColor;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle__bars::before{box-shadow:0 6px 0 currentColor,0 12px 0 currentColor;}
.nav-toggle__bars::after{opacity:0;transform:translateY(6px) rotate(-45deg);}
.site-header[data-open="true"] .nav-toggle{border-color:var(--cyan);color:var(--cyan);}
.site-header[data-open="true"] .nav-toggle__bars::before{
  transform:translateY(6px) rotate(45deg);
  box-shadow:0 0 0 transparent,0 0 0 transparent;
}
.site-header[data-open="true"] .nav-toggle__bars::after{opacity:1;}

@media (min-width:900px){
  .site-header[data-compact] .site-header__inner{
    grid-template-columns:auto minmax(0,1fr) auto;
    grid-template-areas:"mast nav cta";
    padding-block:10px;
    gap:12px 28px;
  }
  .site-header[data-compact] .masthead{
    flex-direction:row;
    align-items:center;
    gap:0;
    padding-block:0;
  }
  .site-header[data-compact] .masthead__eyebrow,
  .site-header[data-compact] .masthead__meta{display:none;}
  .site-header[data-compact] .masthead__mark{font-size:24px;letter-spacing:-.01em;}
  .site-header[data-compact] .header-cta{font-size:14px;padding:.75em 1.1em;}
}

@media (max-width:899px){
  .site-header__inner{
    grid-template-columns:minmax(0,1fr) auto;
    grid-template-areas:
      "mast toggle"
      "cta cta";
    gap:12px;
    padding:12px var(--gutter) 14px;
  }
  .masthead{
    flex-direction:row;
    align-items:center;
    gap:0;
    padding-block:0;
  }
  .masthead__eyebrow,
  .masthead__meta{display:none;}
  .masthead__mark{font-size:clamp(24px,7vw,32px);}
  .header-meter{display:none;}
  .nav-toggle{display:grid;}
  .header-cta{justify-self:start;font-size:14px;padding:.8em 1.3em;}
  .rail__meta{display:none;}
  .site-header__rail{padding-block:5px;}

  .site-nav{
    grid-area:auto;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    max-height:calc(100vh - 90px);
    overflow:auto;
    padding:8px var(--gutter) 24px;
    background:var(--night-2);
    border-bottom:1px solid var(--moss);
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s;
  }
  .site-header[data-open="true"] .site-nav{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .site-nav__list{flex-direction:column;flex-wrap:nowrap;gap:0;justify-content:flex-start;}
  .site-nav__item + .site-nav__item{border-top:1px solid rgba(30,58,46,.85);}
  .nav-link{
    display:flex;
    justify-content:space-between;
    align-items:center;
    width:100%;
    padding:.95em 0;
    font-size:18px;
    border-bottom:0;
  }
  .nav-link__index{font-size:12px;}
  .nav-link[aria-current="page"]{border-bottom-color:transparent;}
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  background:var(--night-2);
  color:var(--chalk);
  border-top:1px solid var(--moss);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(-45deg,rgba(51,230,192,.05) 0 1px,transparent 1px 26px);
  pointer-events:none;
}
.site-footer::after{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:min(320px,42%);
  height:3px;
  background:var(--signal);
  clip-path:polygon(0 0,100% 0,calc(100% - 16px) 100%,0 100%);
}
.site-footer__inner{
  position:relative;
  z-index:1;
  padding-block:clamp(40px,6vw,72px) 0;
}
.footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.35fr 1fr;
  gap:clamp(24px,4vw,56px);
  padding-bottom:clamp(32px,5vw,56px);
}
.footer__brand{min-width:0;}
.footer__mark{
  display:inline-block;
  font-family:var(--font-display);
  font-size:clamp(32px,4vw,48px);
  font-weight:700;
  line-height:.95;
  letter-spacing:-.02em;
  color:var(--chalk);
}
.footer__tagline{
  margin-top:14px;
  max-width:22em;
  font-size:14px;
  line-height:1.65;
  color:var(--mist);
}
.footer__note{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--mist);
  opacity:.8;
}
.footer__top{
  display:inline-flex;
  align-items:center;
  gap:.7em;
  margin-top:22px;
  padding:.7em 1.1em;
  border:1px solid var(--moss);
  border-left:3px solid var(--cyan);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--chalk);
  transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.footer__top:hover{color:var(--night);background:var(--cyan);border-color:var(--cyan);}
.footer__top::after{content:"↑";font-family:var(--font-mono);font-size:14px;line-height:1;}

.footer__col{min-width:0;}
.footer__title{
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
  padding-bottom:12px;
  border-bottom:1px solid var(--moss);
  font-size:12px;
  font-weight:500;
  letter-spacing:.2em;
  color:var(--warm-gray);
  text-transform:uppercase;
}
.footer__title::before{
  content:"";
  width:6px;
  height:6px;
  flex:none;
  background:var(--cyan);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}
.footer__list{display:grid;gap:10px;}
.footer__list--contact{gap:14px;}
.footer__item{min-width:0;}
.footer__link{
  display:inline-flex;
  align-items:center;
  gap:.7em;
  font-size:14px;
  color:var(--mist);
  transition:color .16s var(--ease);
}
.footer__link::before{
  content:"";
  width:10px;
  height:1px;
  flex:none;
  background:var(--moss);
  transition:background-color .16s var(--ease),width .16s var(--ease);
}
.footer__link:hover{color:var(--cyan);}
.footer__link:hover::before{width:16px;background:var(--cyan);}
.footer__label{
  display:block;
  margin-bottom:2px;
  font-size:12px;
  letter-spacing:.18em;
  color:var(--mist);
}
.footer__text{
  display:block;
  font-size:14px;
  line-height:1.6;
  color:var(--chalk);
  overflow-wrap:anywhere;
}
.footer__text--mono{font-family:var(--font-mono);font-size:12px;letter-spacing:.03em;}

.footer__bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  padding-block:18px 26px;
  border-top:1px solid var(--moss);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--mist);
}
.footer__bar-text{max-width:32em;}
.footer__bar-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 14px;
  font-family:var(--font-mono);
  letter-spacing:.06em;
}
.footer__dot{color:var(--moss);}
.footer__icp{color:var(--warm-gray);}

@media (max-width:1023px){
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px 28px;}
}
@media (max-width:599px){
  .footer__grid{grid-template-columns:1fr;gap:28px;}
  .footer__bar{flex-direction:column;align-items:flex-start;}
}

/* ---------- 显现 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .js [data-reveal]{opacity:1;transform:none;transition:none;}
  .skip-link,
  .site-header__rail,
  .site-header__inner,
  .masthead,
  .masthead__mark,
  .header-meter,
  .header-meter__bar,
  .nav-toggle,
  .nav-toggle__bars::before,
  .nav-toggle__bars::after,
  .btn,
  .nav-link,
  .nav-link__index,
  .footer__link,
  .footer__link::before,
  .footer__top,
  .site-nav{transition-duration:.001ms !important;}
}