:root{
  --ink:#04211C;
  --panel:#0A3A31;
  --deep:#011512;
  --orange:#FF5A1F;
  --orange-soft:#FF8A3D;
  --white:#F2F7F5;
  --muted:#C9D6D1;
  --gray:#6B7A75;
  --cyan:#2EE6B6;
  --line:rgba(201,214,209,.18);
  --line-strong:rgba(201,214,209,.34);
  --bw:2px;
  --shadow-hard:6px 6px 0 0 var(--deep);
  --maxw:1180px;
  --gut:clamp(16px,4vw,40px);
  --radius:2px;
  --sans:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:150px;
}

body{
  margin:0;
  min-height:100vh;
  background:var(--ink);
  color:var(--white);
  font-family:var(--sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

#main-content{scroll-margin-top:150px}
main{display:block}

h1,h2,h3,h4{
  margin:0 0 .55em;
  color:var(--white);
  font-weight:900;
  line-height:1.15;
  letter-spacing:-.02em;
  text-wrap:balance;
}
h1{font-size:clamp(2.75rem,6vw,4.5rem)}
h2{font-size:clamp(1.75rem,3.2vw,2.5rem)}
h3{font-size:clamp(1.25rem,1.8vw,1.6rem)}
h4{font-size:1.05rem;letter-spacing:0}

p{margin:0 0 1em}
p:last-child{margin-bottom:0}
img,svg,video{display:block;max-width:100%;height:auto}
ul,ol{margin:0 0 1em;padding-left:1.15em}
li{margin:0 0 .35em}
strong,b{font-weight:800;color:var(--white)}
a{color:inherit}
button{font:inherit}
::selection{background:var(--orange);color:var(--deep)}

:focus-visible{
  outline:3px solid var(--cyan);
  outline-offset:3px;
}

.visually-hidden{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

.skip-link{
  position:fixed;
  top:-120px;
  left:12px;
  z-index:200;
  padding:12px 18px;
  background:var(--orange);
  color:var(--deep);
  font-weight:800;
  text-decoration:none;
  border:var(--bw) solid var(--deep);
  transition:top .2s ease;
}
.skip-link:focus{top:12px}

/* ============ 刊头 ============ */
.masthead{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--deep);
  border-bottom:var(--bw) solid var(--orange);
}

.masthead__inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gut);
}

.masthead__top{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  grid-template-areas:"meta brand actions";
  align-items:center;
  gap:18px;
  padding:14px 0 12px;
}

.masthead__edition{
  grid-area:meta;
  margin:0;
  font-family:var(--mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.1em;
  color:var(--gray);
  display:flex;
  align-items:center;
  gap:8px;
}
.masthead__edition-no{
  display:inline-block;
  padding:2px 7px;
  border:1px solid var(--orange);
  color:var(--orange);
  letter-spacing:.14em;
}

.masthead__brand{
  grid-area:brand;
  display:grid;
  justify-items:center;
  gap:5px;
  text-decoration:none;
  color:var(--white);
}
.brand-name{
  display:block;
  font-size:clamp(24px,3.4vw,38px);
  font-weight:900;
  letter-spacing:-.035em;
  line-height:1;
  padding-bottom:7px;
  border-bottom:4px solid var(--orange);
}
.brand-sub{
  font-family:var(--mono);
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--gray);
  text-transform:uppercase;
}

.masthead__actions{
  grid-area:actions;
  display:flex;
  gap:8px;
  justify-content:flex-end;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 16px;
  border:var(--bw) solid var(--white);
  border-radius:var(--radius);
  background:transparent;
  color:var(--white);
  font-family:var(--sans);
  font-size:14px;
  font-weight:800;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,color .16s ease,border-color .16s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:4px 4px 0 0 var(--orange)}
.btn--solid{
  background:var(--orange);
  border-color:var(--orange);
  color:var(--deep);
  box-shadow:4px 4px 0 0 var(--deep);
}
.btn--solid:hover{box-shadow:6px 6px 0 0 var(--cyan)}
.btn--outline{color:var(--muted)}
.btn--outline:hover{color:var(--white);border-color:var(--orange)}
.btn--block{width:100%}

.orbit-nav{
  border-top:var(--bw) solid var(--line-strong);
}
.orbit-nav__list{
  display:flex;
  flex-wrap:wrap;
  margin:0;
  padding:0;
  list-style:none;
}
.orbit-nav__item{
  margin:0;
  border-right:1px solid var(--line);
}
.orbit-nav__item:first-child{border-left:1px solid var(--line)}
.orbit-nav__link{
  display:flex;
  flex-direction:column;
  gap:1px;
  padding:10px 18px;
  color:var(--muted);
  font-size:15px;
  font-weight:800;
  letter-spacing:.01em;
  text-decoration:none;
  transition:background-color .16s ease,color .16s ease;
}
.orbit-nav__num{
  font-family:var(--mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.18em;
  color:var(--gray);
}
.orbit-nav__link:hover{
  background:rgba(46,230,182,.1);
  color:var(--white);
}
.orbit-nav__link[aria-current="page"]{
  background:var(--orange);
  color:var(--deep);
}
.orbit-nav__link[aria-current="page"] .orbit-nav__num{color:rgba(1,21,18,.72)}

.orbit-nav__toggle{
  grid-area:toggle;
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  border:var(--bw) solid var(--line-strong);
  border-radius:var(--radius);
  background:var(--panel);
  color:var(--white);
  font-size:13px;
  font-weight:800;
  letter-spacing:.06em;
  cursor:pointer;
}
.orbit-nav__toggle-bars{position:relative;flex:none;width:18px;height:12px}
.orbit-nav__toggle-bars::before,
.orbit-nav__toggle-bars::after{
  content:"";
  position:absolute;
  left:0;right:0;
  height:2px;
  background:currentColor;
  transition:transform .2s ease,top .2s ease;
}
.orbit-nav__toggle-bars::before{top:1px}
.orbit-nav__toggle-bars::after{top:9px}
.masthead[data-open="true"] .orbit-nav__toggle{
  background:var(--orange);
  border-color:var(--orange);
  color:var(--deep);
}
.masthead[data-open="true"] .orbit-nav__toggle-bars::before{top:5px;transform:rotate(45deg)}
.masthead[data-open="true"] .orbit-nav__toggle-bars::after{top:5px;transform:rotate(-45deg)}

.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  overflow:hidden;
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  width:100%;
  height:100%;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
}

/* ============ 布局与色带 ============ */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gut);
}

.band{padding:clamp(40px,7vw,88px) 0}
.band--panel{
  background:var(--panel);
  border-top:var(--bw) solid var(--line-strong);
  border-bottom:var(--bw) solid var(--line-strong);
}
.band--deep{background:var(--deep)}
.band--rule{border-top:6px solid var(--orange)}

.grid{display:grid;gap:clamp(16px,2vw,26px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--sidebar{grid-template-columns:minmax(0,.8fr) minmax(0,2fr)}

/* ============ 排版工具 ============ */
.mono{font-family:var(--mono);font-weight:600;letter-spacing:.06em}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 14px;
  font-family:var(--mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--orange-soft);
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--orange)}

.section-no{
  display:block;
  margin:0 0 10px;
  font-family:var(--mono);
  font-size:clamp(2.25rem,5vw,3.5rem);
  font-weight:700;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--orange);
}

.lede{
  max-width:64ch;
  margin:0;
  font-size:clamp(1rem,.6vw + .88rem,1.25rem);
  line-height:1.7;
  color:var(--muted);
}

.prose{
  max-width:74ch;
  font-size:clamp(16px,.5vw + .9rem,18px);
  line-height:1.75;
  color:var(--white);
}
.prose h2{margin-top:1.6em;font-size:clamp(1.4rem,2.2vw,1.9rem)}
.prose h3{margin-top:1.4em}
.prose ul,.prose ol{padding-left:1.3em}
.prose a{color:var(--orange-soft);text-underline-offset:3px}
.prose code{
  font-family:var(--mono);
  font-size:.92em;
  padding:2px 6px;
  background:var(--deep);
  border:1px solid var(--line);
}
.prose blockquote{
  margin:1.4em 0;
  padding:14px 18px;
  border-left:4px solid var(--orange);
  background:rgba(10,58,49,.7);
  color:var(--muted);
}

/* ============ 数据与卡片 ============ */
.stat{
  display:grid;
  gap:6px;
  padding:18px;
  background:var(--panel);
  border:var(--bw) solid var(--line-strong);
  box-shadow:var(--shadow-hard);
}
.stat__value{
  font-family:var(--mono);
  font-size:clamp(2rem,4vw,3rem);
  font-weight:700;
  line-height:1;
  letter-spacing:-.02em;
  color:var(--orange);
}
.stat__label{
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.16em;
  color:var(--muted);
}

.card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:22px;
  background:var(--panel);
  border:var(--bw) solid var(--line-strong);
  box-shadow:var(--shadow-hard);
  text-decoration:none;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card:hover{
  transform:translate(-3px,-3px);
  border-color:var(--orange);
  box-shadow:9px 9px 0 0 var(--orange);
}
.card__title{
  margin:0;
  font-size:1.1rem;
  font-weight:800;
  letter-spacing:-.01em;
}
.card__meta{
  margin:0;
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--gray);
}
.card__body{
  margin:0;
  font-size:14.5px;
  color:var(--muted);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--line-strong);
  font-family:var(--mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted);
}
.tag--live{border-color:var(--cyan);color:var(--cyan)}
.tag--hot{border-color:var(--orange);color:var(--orange)}

/* ============ 图片容器 ============ */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:
    linear-gradient(140deg,rgba(46,230,182,.12),transparent 60%),
    repeating-linear-gradient(0deg,var(--panel) 0 22px,var(--ink) 22px 44px);
  border:var(--bw) solid var(--line-strong);
}
.media-frame img,
.media-frame__img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame__caption{
  margin:10px 0 0;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--gray);
}

/* ============ 面包屑与目录 ============ */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--gray);
}
.breadcrumbs li{margin:0}
.breadcrumbs li + li::before{content:"/";margin-right:8px;color:var(--line-strong)}
.breadcrumbs a{color:var(--muted);text-decoration:none}
.breadcrumbs a:hover{color:var(--orange-soft)}
.breadcrumbs [aria-current="page"]{color:var(--orange)}

.toc{
  display:grid;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
  border-left:var(--bw) solid var(--line-strong);
}
.toc li{margin:0}
.toc__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:10px 14px;
  color:var(--muted);
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  transition:background-color .16s ease,color .16s ease;
}
.toc__link:hover{background:rgba(46,230,182,.1);color:var(--white)}
.toc__link.is-active,
.toc__link[aria-current="true"]{
  background:var(--orange);
  color:var(--deep);
}

/* ============ 可展开内容组 ============ */
.disclosure{
  background:var(--panel);
  border:var(--bw) solid var(--line-strong);
}
.disclosure + .disclosure{margin-top:-2px}
.disclosure__trigger{
  display:flex;
  width:100%;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 18px;
  border:0;
  background:transparent;
  color:var(--white);
  font-size:16px;
  font-weight:800;
  text-align:left;
  cursor:pointer;
  transition:background-color .16s ease,color .16s ease;
}
.disclosure__trigger:hover{background:rgba(46,230,182,.09)}
.disclosure__trigger[aria-expanded="true"]{
  background:var(--orange);
  color:var(--deep);
}
.disclosure__mark{
  position:relative;
  flex:none;
  width:22px;
  height:22px;
  border:2px solid currentColor;
}
.disclosure__mark::before,
.disclosure__mark::after{
  content:"";
  position:absolute;
  top:50%;left:50%;
  background:currentColor;
  transform:translate(-50%,-50%);
}
.disclosure__mark::before{width:10px;height:2px}
.disclosure__mark::after{width:2px;height:10px;transition:transform .18s ease}
.disclosure__trigger[aria-expanded="true"] .disclosure__mark::after{transform:translate(-50%,-50%) scaleY(0)}
.disclosure__panel{
  padding:4px 18px 20px;
  border-top:1px solid var(--line);
  color:var(--muted);
  font-size:15px;
  line-height:1.75;
}
.disclosure__panel p:last-child{margin-bottom:0}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;
  right:clamp(14px,3vw,28px);
  bottom:clamp(14px,3vw,28px);
  z-index:70;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:48px;
  height:48px;
  border:var(--bw) solid var(--orange);
  border-radius:var(--radius);
  background:var(--deep);
  color:var(--orange);
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,background-color .2s ease,color .2s ease;
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--orange);color:var(--deep)}
.to-top__glyph{font-family:var(--mono);font-size:16px;font-weight:700;line-height:1}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--deep);
  border-top:6px solid var(--orange);
  color:var(--muted);
}
.site-footer__inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(36px,6vw,64px) var(--gut) 30px;
}
.site-footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:clamp(20px,3vw,40px);
}
.footer-col{min-width:0}
.footer-brand{
  display:inline-block;
  margin-bottom:14px;
  padding-bottom:6px;
  border-bottom:3px solid var(--orange);
  color:var(--white);
  font-size:22px;
  font-weight:900;
  letter-spacing:-.03em;
  text-decoration:none;
}
.footer-heading{
  margin:0 0 12px;
  font-family:var(--mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--white);
}
.footer-list{
  display:grid;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-list li{margin:0}
.footer-list a{
  color:var(--muted);
  font-size:14px;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease;
}
.footer-list a:hover{color:var(--orange-soft);border-bottom-color:var(--orange-soft)}
.footer-contact{
  display:grid;
  gap:12px;
  margin:0 0 14px;
  padding:0;
  list-style:none;
}
.footer-contact li{display:grid;gap:2px;margin:0}
.footer-contact__label{
  font-family:var(--mono);
  font-size:10.5px;
  letter-spacing:.2em;
  color:var(--gray);
}
.footer-contact__value{
  font-family:var(--mono);
  font-size:13.5px;
  font-weight:600;
  color:var(--cyan);
  word-break:break-word;
}
.footer-copy{
  margin:0 0 12px;
  font-size:14px;
  line-height:1.75;
  color:var(--muted);
}
.footer-note{
  margin:10px 0 0;
  font-size:12px;
  line-height:1.7;
  color:var(--gray);
}
.footer-note--wide{
  margin-top:18px;
  padding-top:14px;
  border-top:1px solid var(--line);
  font-family:var(--mono);
  letter-spacing:.06em;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  margin-top:clamp(28px,4vw,44px);
  padding-top:18px;
  border-top:1px solid var(--line);
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
  margin:0;
  padding:0;
  list-style:none;
  font-size:12.5px;
}
.footer-legal li{margin:0}
.footer-legal a{color:var(--muted);text-decoration:none}
.footer-legal a:hover{color:var(--orange-soft)}
.footer-icp{
  margin:0;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--gray);
}

/* ============ 响应式 ============ */
@media (max-width:1000px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--sidebar{grid-template-columns:minmax(0,1fr)}
  .site-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-col--brand{grid-column:1 / -1}
}

@media (max-width:900px){
  html{scroll-padding-top:120px}
  #main-content{scroll-margin-top:120px}

  .masthead__top{
    grid-template-columns:minmax(0,1fr) auto;
    grid-template-areas:
      "brand toggle"
      "actions actions";
    gap:12px;
    padding:12px 0 10px;
  }
  .masthead__edition{display:none}
  .masthead__brand{justify-items:start;text-align:left}
  .brand-sub{letter-spacing:.14em}
  .masthead__actions{justify-content:stretch}
  .masthead__actions .btn{flex:1 1 0}
  .orbit-nav__toggle{display:inline-flex}

  .orbit-nav{
    display:grid;
    grid-template-rows:0fr;
    overflow:hidden;
    border-top:var(--bw) solid var(--line-strong);
    transition:grid-template-rows .26s ease;
  }
  .orbit-nav__list{
    min-height:0;
    overflow:hidden;
    flex-direction:column;
    flex-wrap:nowrap;
  }
  .masthead[data-open="true"] .orbit-nav{grid-template-rows:1fr}
  .orbit-nav__item{
    border-right:0;
    border-bottom:1px solid var(--line);
  }
  .orbit-nav__item:first-child{border-left:0}
  .orbit-nav__link{
    flex-direction:row;
    align-items:center;
    gap:12px;
    padding:14px 2px;
    font-size:16px;
  }
}

@media (max-width:680px){
  .grid--2{grid-template-columns:minmax(0,1fr)}
  .site-footer__grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .btn{padding:11px 14px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .orbit-nav{transition:none}
  .to-top{transform:none}
}