:root{
  --ink-900:#06231C;
  --ink-800:#0B3A2E;
  --ink-950:#080B0A;
  --orange:#FF6A2A;
  --orange-soft:#FF9A5C;
  --cyan:#29F2D0;
  --moss:#7F948B;
  --mist:#F4F7F3;
  --glass:#AAB8B1;
  --alert:#FF4D5E;
  --line:rgba(170,184,177,.22);
  --line-soft:rgba(170,184,177,.14);
  --line-strong:rgba(41,242,208,.42);
  --radius-sm:4px;
  --radius-md:14px;
  --wrap:1280px;
  --pad-x:28px;
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  background-color:var(--ink-900);
  background-image:
    radial-gradient(900px 520px at 78% -8%, rgba(41,242,208,.11), transparent 62%),
    radial-gradient(760px 460px at 6% 2%, rgba(255,106,42,.09), transparent 60%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  color:var(--mist);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.65;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg{max-width:100%;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;}
strong{font-weight:600;}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}

.skip-link{
  position:fixed;
  top:10px;
  left:50%;
  transform:translate(-50%,-200%);
  z-index:300;
  display:inline-block;
  padding:10px 20px;
  background:var(--cyan);
  color:var(--ink-900);
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  border-radius:var(--radius-sm);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translate(-50%,0);}

.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--pad-x);
}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:12px 20px;
  border:1px solid transparent;
  border-radius:var(--radius-sm);
  font-family:var(--font-sans);
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  letter-spacing:.06em;
  text-align:center;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn--primary{background:var(--orange);color:#14100C;border-color:var(--orange);}
.btn--primary:hover{background:var(--orange-soft);border-color:var(--orange-soft);}
.btn--ghost{background:rgba(11,58,46,.58);color:var(--mist);border-color:var(--line);}
.btn--ghost:hover{border-color:var(--line-strong);color:var(--cyan);}
.btn:active{transform:translateY(1px);}

/* ---------- 数据与章节索引 ---------- */
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.section-label{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
}
.section-label::before{
  content:"";
  width:22px;
  height:1px;
  background:var(--cyan);
  opacity:.75;
}

/* ---------- 玻璃层与网格 ---------- */
.panel{
  background:linear-gradient(165deg,rgba(11,58,46,.84) 0%,rgba(6,35,28,.68) 100%);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:22px;
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.grid{display:grid;gap:24px;}
.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));}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--moss);
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li + li::before{content:"/";color:rgba(127,148,139,.55);}
.breadcrumb a{
  color:var(--glass);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:var(--line-strong);}

/* ---------- 正文容器 ---------- */
.prose{
  max-width:68ch;
  font-size:17px;
  line-height:1.75;
  color:rgba(244,247,243,.88);
}
.prose > *{margin:0;}
.prose > * + *{margin-top:1.05em;}
.prose h2{
  font-size:clamp(20px,2.1vw,26px);
  font-weight:600;
  letter-spacing:.02em;
  color:var(--mist);
  margin-top:1.7em;
}
.prose h3{
  font-size:18px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--cyan);
  margin-top:1.45em;
}
.prose ul,.prose ol{padding-left:1.25em;list-style:disc;}
.prose ol{list-style:decimal;}
.prose li + li{margin-top:.4em;}
.prose a{
  color:var(--cyan);
  border-bottom:1px solid var(--line-strong);
}
.prose a:hover{border-bottom-color:var(--cyan);}
.prose strong{color:var(--mist);}
.prose blockquote{
  margin:1.4em 0;
  padding:14px 18px;
  border-left:3px solid var(--orange);
  background:rgba(11,58,46,.62);
  color:rgba(244,247,243,.92);
}

/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  --media-ratio:16 / 9;
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:var(--media-ratio);
  min-height:160px;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:
    radial-gradient(120% 90% at 18% 8%, rgba(41,242,208,.15), transparent 58%),
    linear-gradient(160deg,#0B3A2E 0%,#06231C 72%);
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  opacity:.9;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(41,242,208,.09) 1px,transparent 1px),
    linear-gradient(90deg,rgba(41,242,208,.09) 1px,transparent 1px);
  background-size:44px 44px;
}
.media-frame > img{
  position:relative;
  z-index:1;
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
  filter:saturate(.92) contrast(1.04);
}
.media-frame--tall{--media-ratio:4 / 5;}
.media-frame__tag{
  position:absolute;
  left:12px;
  bottom:12px;
  z-index:2;
  padding:5px 9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
  background:rgba(8,11,10,.66);
  border:1px solid rgba(41,242,208,.34);
  border-radius:3px;
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
}

/* ================= 头部刊头 ================= */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  color:var(--mist);
  background:linear-gradient(180deg,rgba(11,58,46,.97) 0%,rgba(6,35,28,.95) 100%);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(16px) saturate(1.08);
  backdrop-filter:blur(16px) saturate(1.08);
}
.site-header__bar{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:18px;
  max-width:var(--wrap);
  margin-inline:auto;
  padding:20px var(--pad-x) 16px;
  transition:padding .3s var(--ease);
}
.site-header__meta{
  display:flex;
  align-items:center;
  min-width:0;
}
.edition-line{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--moss);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  transition:opacity .25s var(--ease);
}

.brand{
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  gap:9px;
  justify-self:center;
  color:var(--mist);
  text-decoration:none;
}
.brand__mark{
  font-family:var(--font-sans);
  font-size:clamp(20px,2.2vw,27px);
  font-weight:600;
  line-height:1.1;
  letter-spacing:.26em;
  text-indent:.26em;
  white-space:nowrap;
  transition:font-size .3s var(--ease),color .2s var(--ease);
}
.brand:hover .brand__mark{color:var(--cyan);}
.brand__rule{
  display:block;
  width:100%;
  min-width:74px;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--orange),transparent);
  opacity:.9;
}

.site-header__actions{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:10px;
}
.quick-action{
  padding:9px 16px;
  font-size:13px;
  letter-spacing:.14em;
  white-space:nowrap;
}
.icon-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  flex:0 0 auto;
  color:var(--glass);
  background:rgba(8,11,10,.3);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.icon-link:hover{
  color:var(--cyan);
  border-color:var(--line-strong);
  background:rgba(8,11,10,.5);
}
.icon-link__glyph{font-size:15px;line-height:1;}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:8px 12px;
  color:var(--mist);
  font-size:13px;
  font-weight:500;
  letter-spacing:.14em;
  background:rgba(8,11,10,.35);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--cyan);}
.nav-toggle__lines{display:inline-flex;flex-direction:column;gap:4px;}
.nav-toggle__lines span{
  display:block;
  width:16px;
  height:2px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle__label{white-space:nowrap;}
.site-header[data-open] .nav-toggle__lines span:first-child{transform:translateY(6px) rotate(45deg);}
.site-header[data-open] .nav-toggle__lines span:last-child{transform:translateY(-6px) rotate(-45deg);}

.site-nav{border-top:1px solid var(--line-soft);}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:6px;
  max-width:var(--wrap);
  margin-inline:auto;
  padding:6px var(--pad-x) 10px;
}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:9px 15px 11px;
  font-size:15px;
  letter-spacing:.08em;
  color:rgba(244,247,243,.76);
  white-space:nowrap;
  transition:color .18s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:15px;
  right:15px;
  bottom:4px;
  height:2px;
  background:var(--orange);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.site-nav__link:hover{color:var(--mist);}
.site-nav__link:hover::after{transform:scaleX(1);}
.site-nav__link[aria-current="page"]{color:var(--mist);font-weight:600;}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);}

.site-header.is-condensed .site-header__bar{padding-top:9px;padding-bottom:9px;}
.site-header.is-condensed .edition-line{opacity:0;}
.site-header.is-condensed .brand__mark{font-size:19px;}
.site-header.is-condensed .site-nav__list{padding-top:2px;padding-bottom:4px;}
.site-header.is-condensed .site-nav__link{padding-top:6px;padding-bottom:8px;font-size:14px;}

.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transform:scaleX(0);
  transform-origin:0 50%;
  pointer-events:none;
}

/* ================= 页脚记分牌 ================= */
.site-footer{
  margin-top:0;
  color:rgba(244,247,243,.82);
  background:var(--ink-950);
  border-top:1px solid rgba(41,242,208,.18);
}
.site-footer__inner{
  display:grid;
  grid-template-columns:1.05fr 1.35fr;
  gap:48px;
  padding-top:56px;
  padding-bottom:48px;
}
.site-footer__brand{
  display:grid;
  align-content:start;
  gap:16px;
}
.brand--footer{align-items:flex-start;justify-self:start;}
.brand--footer .brand__mark{font-size:22px;letter-spacing:.2em;}
.brand--footer .brand__rule{min-width:58px;}
.site-footer__note{
  max-width:34em;
  font-size:13px;
  line-height:1.75;
  color:var(--moss);
}
.site-footer__cols{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:32px;
}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--orange);
}
.footer-list{
  display:grid;
  gap:10px;
  font-size:14px;
  line-height:1.65;
  color:rgba(244,247,243,.78);
}
.footer-list a{
  color:var(--mist);
  border-bottom:1px solid rgba(41,242,208,.38);
  padding-bottom:1px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-list a:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.site-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  padding-top:18px;
  padding-bottom:26px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--glass);
}
.site-footer__copy,.site-footer__icp{line-height:1.5;}

/* ================= 响应式 ================= */
@media (max-width:1024px){
  :root{--pad-x:22px;}
  .site-header__bar{gap:14px;padding-top:16px;padding-bottom:14px;}
  .edition-line{font-size:10px;letter-spacing:.16em;}
}

@media (max-width:900px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .site-footer__inner{grid-template-columns:1fr;gap:36px;padding-top:44px;}
}

@media (max-width:860px){
  .site-header__bar{
    grid-template-columns:auto 1fr;
    gap:12px;
    padding:12px var(--pad-x);
  }
  .site-header__meta{display:none;}
  .brand{justify-self:start;align-items:flex-start;gap:7px;}
  .brand__rule{min-width:46px;}
  .site-header__actions{justify-self:end;gap:8px;}
  .quick-action{padding:8px 12px;font-size:12px;letter-spacing:.1em;}
  .nav-toggle{display:inline-flex;}
  .site-nav{display:none;border-top:1px solid var(--line);}
  .site-header[data-open] .site-nav{display:block;}
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px var(--pad-x) 16px;
  }
  .site-nav__link{
    padding:14px 2px;
    font-size:16px;
    border-bottom:1px solid var(--line-soft);
  }
  .site-nav__link::after{
    left:2px;
    right:auto;
    bottom:9px;
    width:24px;
  }
  .site-header.is-condensed .site-nav__link{padding-top:14px;padding-bottom:14px;font-size:16px;}
  .site-header.is-condensed .brand__mark{font-size:19px;}
  .site-footer__cols{grid-template-columns:1fr 1fr;}
}

@media (max-width:620px){
  :root{--pad-x:18px;}
  body{font-size:16px;}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr;}
  .panel{padding:18px;}
  .site-footer__cols{grid-template-columns:1fr;gap:26px;}
  .site-footer__base{flex-direction:column;align-items:flex-start;gap:8px;}
  .site-footer__inner{padding-top:36px;padding-bottom:32px;}
}

@media (max-width:420px){
  .icon-link{display:none;}
  .brand__mark{font-size:18px;letter-spacing:.18em;text-indent:.18em;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}