:root{
  --rail:#0B2B33;
  --rail-soft:#174A52;
  --teal:#2F7D7A;
  --paper:#F7F3EA;
  --mist:#DCE5E5;
  --ink:#071013;
  --orange:#FF6A2B;
  --green:#37E08B;
  --amber:#FFB020;
  --white:#FFFFFF;

  --line:rgba(220,229,229,.22);
  --line-soft:rgba(220,229,229,.12);
  --edge:rgba(7,16,19,.14);

  --font-display:"Barlow Condensed","DIN Condensed","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;

  --rail-w:17.5rem;
  --gutter:clamp(1.15rem,3.2vw,3rem);
  --shell:1400px;
  --radius:2px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:clamp(1rem,.35vw + .92rem,1.125rem);
  font-weight:400;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,figure,ul,ol,dl,dd,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
img,svg,video{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
table{border-collapse:collapse;width:100%;}
hr{border:0;}
#main-content{display:block;}
#main-content:focus{outline:none;}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.08;
  letter-spacing:.008em;
}
h1{font-size:clamp(2rem,4vw,4.2rem);}
h2{font-size:clamp(1.5rem,2.4vw,2rem);}
h3{font-size:clamp(1.1rem,1.5vw,1.375rem);}

.mono,.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.75rem;
  font-weight:500;
  letter-spacing:.08em;
  color:var(--teal);
  text-transform:uppercase;
}
.visually-hidden{
  position:absolute;width:1px;height:1px;
  padding:0;margin:-1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 可访问性 ---------- */
.skip-link{
  position:absolute;
  top:-4.5rem;left:1rem;
  z-index:1000;
  padding:.6rem 1rem;
  background:var(--amber);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:.8125rem;
  letter-spacing:.06em;
  border-radius:var(--radius);
  transition:top .16s var(--ease);
}
.skip-link:focus{top:1rem;}
:focus-visible{
  outline:2px solid var(--amber);
  outline-offset:3px;
}

/* ---------- 布局骨架 ---------- */
.shell{
  width:min(100% - 2 * var(--gutter),var(--shell));
  margin-inline:auto;
}
.split{
  display:grid;
  grid-template-columns:minmax(0,var(--rail-w)) minmax(0,1fr);
  gap:0;
}
.grid12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(.85rem,1.6vw,1.5rem);
}
.grid12 > *{min-width:0;}

/* ---------- 正文容器 ---------- */
.prose{max-width:68ch;}
.prose p + p{margin-top:1.1em;}
.prose h2,.prose h3{margin-top:1.9em;margin-bottom:.55em;}
.prose ul{list-style:disc;padding-left:1.3em;}
.prose ol{list-style:decimal;padding-left:1.35em;}
.prose li{margin-block:.35em;}
.prose a{
  color:var(--teal);
  text-decoration:underline;
  text-underline-offset:.18em;
  text-decoration-thickness:1px;
}
.prose a:hover{color:var(--rail);}
.prose strong{font-weight:700;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.7rem 1.15rem;
  border:1px solid var(--edge);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:.8125rem;
  font-weight:500;
  letter-spacing:.05em;
  line-height:1.3;
  color:var(--rail);
  background:transparent;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn--accent{
  background:var(--orange);
  border-color:var(--orange);
  color:#2A0C02;
  font-weight:700;
  box-shadow:0 10px 24px -18px rgba(255,106,43,.95);
}
.btn--accent:hover{background:#FF8149;border-color:#FF8149;color:#2A0C02;}
.btn--ghost{
  color:var(--paper);
  border-color:rgba(220,229,229,.42);
}
.btn--ghost:hover{
  color:var(--white);
  border-color:var(--green);
  background:rgba(55,224,139,.1);
}
.btn--line{
  color:var(--rail);
  border-color:rgba(11,43,51,.3);
}
.btn--line:hover{
  color:var(--ink);
  border-color:var(--orange);
  background:rgba(255,106,43,.09);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.07em;
  color:rgba(7,16,19,.58);
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.15rem;
}
.breadcrumb a{color:var(--teal);}
.breadcrumb a:hover{color:var(--rail);text-decoration:underline;text-underline-offset:.18em;}
.breadcrumb li + li::before{
  content:"/";
  margin-right:.45rem;
  margin-left:.15rem;
  color:rgba(7,16,19,.3);
}

/* ---------- 基础组件 ---------- */
.card{
  background:var(--white);
  border:1px solid var(--edge);
  border-radius:var(--radius);
  padding:clamp(1.1rem,2vw,1.6rem);
  box-shadow:0 1px 0 rgba(7,16,19,.04),0 18px 40px -34px rgba(7,16,19,.6);
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.2rem .6rem;
  border:1px solid var(--edge);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.07em;
  color:var(--rail);
  white-space:nowrap;
}
.tag--live{
  border-color:rgba(55,224,139,.55);
  background:rgba(55,224,139,.14);
  color:#0A5231;
}
.rule{
  height:1px;
  background:var(--line-soft);
  border:0;
  margin-block:clamp(1.25rem,3vw,2.25rem);
}

/* ---------- 图片容器基础规则 ---------- */
.media{
  position:relative;
  overflow:hidden;
  background:linear-gradient(158deg,var(--rail-soft) 0%,var(--rail) 55%,#071013 100%);
  border:1px solid var(--edge);
  border-radius:var(--radius);
  isolation:isolate;
}
.media > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(220,229,229,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(220,229,229,.07) 1px,transparent 1px);
  background-size:2rem 2rem;
  pointer-events:none;
  z-index:1;
}
.media--band{aspect-ratio:21 / 6;}
.media--card{aspect-ratio:4 / 3;}
.media--feature{aspect-ratio:16 / 10;}
.media__overlay{
  position:absolute;
  inset:auto 0 0 0;
  z-index:2;
  padding:.85rem 1rem;
  background:linear-gradient(to top,rgba(7,16,19,.88),rgba(7,16,19,0));
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.06em;
}

/* ---------- 头部 ---------- */
.site-header{
  position:relative;
  background:var(--rail);
  color:var(--paper);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:linear-gradient(90deg,var(--orange) 0%,var(--green) 42%,rgba(55,224,139,0) 82%);
  opacity:.6;
  pointer-events:none;
}
.site-header__inner{
  display:grid;
  grid-template-columns:minmax(0,var(--rail-w)) minmax(0,1fr);
  align-items:stretch;
  width:min(100% - 2 * var(--gutter),var(--shell));
  margin-inline:auto;
}
.site-header__rail{
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:.55rem;
  padding:1.35rem 1.5rem 1.35rem 0;
  border-right:1px solid var(--line);
}
.brand{
  display:flex;
  align-items:center;
  gap:.7rem;
  color:var(--paper);
}
.brand__mark{
  flex:0 0 auto;
  width:2.2rem;
  height:2.2rem;
  display:grid;
  grid-template-columns:repeat(2,1fr);
  grid-template-rows:repeat(2,1fr);
  gap:2px;
  padding:3px;
  border:1px solid rgba(55,224,139,.5);
  background:rgba(7,16,19,.6);
}
.brand__mark span{display:block;background:var(--green);opacity:.9;}
.brand__mark span:nth-child(2){background:var(--teal);opacity:.85;}
.brand__mark span:nth-child(3){background:var(--orange);opacity:.95;}
.brand__mark span:nth-child(4){background:rgba(220,229,229,.35);}
.brand__text{display:block;min-width:0;}
.brand__name{
  display:block;
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.3rem;
  letter-spacing:.07em;
  line-height:1.05;
}
.brand__sub{
  display:block;
  margin-top:.22rem;
  font-family:var(--font-mono);
  font-size:.625rem;
  letter-spacing:.16em;
  color:rgba(247,243,234,.62);
}
.pulse{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.09em;
  color:rgba(247,243,234,.72);
}
.pulse__dot{
  flex:0 0 auto;
  width:.45rem;
  height:.45rem;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 0 rgba(55,224,139,.55);
  animation:pulseRing 2.8s ease-out infinite;
}
.pulse--footer{color:rgba(247,243,234,.78);}
@keyframes pulseRing{
  0%{box-shadow:0 0 0 0 rgba(55,224,139,.5);}
  70%{box-shadow:0 0 0 .55rem rgba(55,224,139,0);}
  100%{box-shadow:0 0 0 0 rgba(55,224,139,0);}
}
.site-header__panel{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto auto;
  grid-template-areas:"util nav cta";
  align-items:center;
  gap:.7rem clamp(.9rem,2vw,1.75rem);
  padding:1.05rem 0 1.05rem clamp(1rem,2vw,1.75rem);
}
.utility-line{
  grid-area:util;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.06em;
  line-height:1.7;
  color:rgba(247,243,234,.58);
}
.nav-toggle{
  grid-area:toggle;
  display:none;
  align-items:center;
  gap:.55rem;
  padding:.55rem .8rem;
  border:1px solid rgba(220,229,229,.32);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.08em;
  color:var(--paper);
  background:rgba(7,16,19,.3);
}
.nav-toggle:hover{border-color:var(--green);}
.nav-toggle__bars{display:grid;gap:3px;width:1rem;}
.nav-toggle__bars span{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle__text{line-height:1;}
.site-header[data-open] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg);}
.site-header[data-open] .nav-toggle__bars span:nth-child(2){opacity:0;}
.site-header[data-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg);}
.nav{grid-area:nav;}
.nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.1rem;
}
.nav__item{display:block;}
.nav__link{
  display:inline-block;
  padding:.45rem .7rem;
  font-size:.875rem;
  font-weight:500;
  line-height:1.5;
  color:rgba(247,243,234,.82);
  border-bottom:2px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.nav__link:hover{
  color:var(--white);
  border-bottom-color:var(--orange);
  background:rgba(23,74,82,.55);
}
.nav__link[aria-current="page"]{
  color:var(--white);
  background:var(--rail-soft);
  border-bottom-color:var(--green);
}
.header-cta{
  grid-area:cta;
  white-space:nowrap;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--rail);
  color:var(--paper);
  border-top:1px solid var(--line);
}
.site-footer__inner{
  display:grid;
  grid-template-columns:minmax(0,var(--rail-w)) minmax(0,1fr);
  width:min(100% - 2 * var(--gutter),var(--shell));
  margin-inline:auto;
  padding-block:clamp(2.25rem,5vw,3.5rem);
}
.footer-rail{
  display:flex;
  flex-direction:column;
  gap:.85rem;
  padding-right:1.5rem;
  border-right:1px solid var(--line);
}
.footer-brand{
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.35rem;
  letter-spacing:.08em;
  line-height:1.1;
}
.footer-brand__sub{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.08em;
  line-height:1.75;
  color:rgba(247,243,234,.62);
}
.footer-note{
  font-size:.8125rem;
  line-height:1.7;
  color:rgba(247,243,234,.66);
}
.footer-main{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:clamp(1.5rem,3vw,2.5rem);
  padding-left:clamp(1rem,2vw,1.75rem);
}
.footer-block{min-width:0;}
.footer-block__title{
  font-family:var(--font-mono);
  font-size:.6875rem;
  font-weight:500;
  letter-spacing:.16em;
  line-height:1.6;
  color:rgba(247,243,234,.52);
  margin-bottom:.85rem;
}
.footer-contact{display:grid;gap:.6rem;}
.footer-contact__row{
  display:grid;
  grid-template-columns:5rem minmax(0,1fr);
  gap:.75rem;
  align-items:start;
  padding-top:.6rem;
  border-top:1px solid var(--line-soft);
}
.footer-contact__row:first-child{padding-top:0;border-top:0;}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.07em;
  color:rgba(247,243,234,.5);
  padding-top:.18rem;
}
.footer-contact__val{
  font-size:.9375rem;
  line-height:1.7;
  color:var(--paper);
  overflow-wrap:anywhere;
}
.footer-links{display:grid;gap:0;}
.footer-links__item{border-top:1px solid var(--line-soft);}
.footer-links__item:first-child{border-top:0;}
.footer-links__link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  padding:.68rem 0;
  font-size:.9375rem;
  color:rgba(247,243,234,.86);
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.footer-links__link::after{
  content:"→";
  font-family:var(--font-mono);
  font-size:.8125rem;
  color:rgba(55,224,139,.65);
  transition:color .18s var(--ease);
}
.footer-links__link:hover{color:var(--white);padding-left:.35rem;}
.footer-links__link:hover::after{color:var(--green);}
.site-footer__bar{
  border-top:1px solid var(--line-soft);
  background:rgba(7,16,19,.38);
}
.site-footer__bar-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.4rem 1.5rem;
  width:min(100% - 2 * var(--gutter),var(--shell));
  margin-inline:auto;
  padding-block:1.05rem;
}
.footer-copy{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.06em;
  line-height:1.75;
  color:rgba(247,243,234,.62);
}
.footer-copy--muted{
  color:rgba(247,243,234,.42);
  max-width:52ch;
}

/* ---------- 动效与进度 ---------- */
.scroll-meter{
  position:fixed;
  top:0;left:0;
  z-index:999;
  width:100%;
  height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--orange) 0%,var(--amber) 55%,var(--green) 100%);
  pointer-events:none;
  will-change:transform;
}
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
[data-reveal].is-revealed{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:78rem){
  .utility-line{display:none;}
}
@media (max-width:62rem){
  .site-header__inner{grid-template-columns:minmax(0,1fr);}
  .site-header__rail{
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:1rem;
    padding:1rem 0;
    border-right:0;
    border-bottom:1px solid var(--line);
  }
  .site-header__panel{
    grid-template-columns:minmax(0,1fr) auto;
    grid-template-areas:
      "util toggle"
      "nav nav"
      "cta cta";
    padding:.9rem 0 1.1rem;
  }
  .utility-line{display:block;font-size:.625rem;}
  .nav-toggle{display:inline-flex;}
  .nav{display:none;}
  .site-header[data-open] .nav{
    display:block;
    margin-top:.4rem;
    padding:.3rem .7rem .55rem;
    background:rgba(7,16,19,.55);
    border:1px solid var(--line);
    border-radius:var(--radius);
    animation:navIn .22s var(--ease);
  }
  .nav__list{flex-direction:column;align-items:stretch;gap:0;}
  .nav__link{
    display:block;
    width:100%;
    padding:.72rem .3rem;
    border-bottom:1px solid var(--line-soft);
    border-left:2px solid transparent;
  }
  .nav__link:hover,.nav__link[aria-current="page"]{
    border-bottom-color:var(--line-soft);
    border-left-color:var(--green);
    background:rgba(23,74,82,.7);
  }
  .header-cta{justify-self:start;margin-top:.7rem;}
  .site-footer__inner{grid-template-columns:minmax(0,1fr);}
  .footer-rail{
    padding:0 0 1.25rem;
    border-right:0;
    border-bottom:1px solid var(--line);
  }
  .footer-main{
    grid-template-columns:minmax(0,1fr);
    gap:1.6rem;
    padding:1.5rem 0 0;
  }
}
@media (max-width:48rem){
  .grid12{grid-template-columns:minmax(0,1fr);}
  .split{grid-template-columns:minmax(0,1fr);}
  .footer-contact__row{grid-template-columns:minmax(0,1fr);gap:.15rem;}
  .footer-contact__key{padding-top:0;}
  .site-footer__bar-inner{flex-direction:column;align-items:flex-start;}
}
@keyframes navIn{
  from{opacity:0;transform:translateY(-6px);}
  to{opacity:1;transform:none;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  [data-reveal]{opacity:1;transform:none;}
  .scroll-meter{display:none;}
  .btn:hover{transform:none;}
}

@media print{
  .site-header,.site-footer,.scroll-meter,.skip-link{display:none !important;}
  body{background:#fff;color:#000;font-size:11pt;}
  .card{box-shadow:none;border-color:#999;}
  a{text-decoration:underline;}
}