:root{
  --deep-900:#061826;
  --deep-800:#0B2537;
  --deep-700:#12384F;
  --sand:#D8B56A;
  --sand-light:#F0D9A6;
  --amber:#F28A2E;
  --jade:#78B7A2;
  --paper:#F3EDE0;
  --ink:#121A20;
  --mist:#A9BCC6;
  --white:#FFFFFF;

  --font-head:"Barlow Condensed","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono","Noto Sans Mono CJK SC",ui-monospace,SFMono-Regular,Menlo,monospace;

  --shell-max:1240px;
  --gutter:clamp(1rem,3.2vw,2.5rem);
  --radius:4px;
  --ease:160ms ease;
}

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

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

body{
  margin:0;
  background:var(--deep-900);
  color:#E4EDF1;
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}

h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;}
a{color:inherit;}
table{border-collapse:collapse;}

:focus-visible{
  outline:2px solid var(--sand);
  outline-offset:3px;
  border-radius:1px;
}
.site-head :focus-visible{outline-color:var(--sand-light);}
.panel :focus-visible{outline-color:var(--deep-700);}

/* ---------- 骨架 ---------- */
.shell{
  width:min(var(--shell-max), calc(100% - var(--gutter) * 2));
  margin-inline:auto;
}

.skip-link{
  position:fixed;
  top:.6rem;
  left:.6rem;
  z-index:300;
  padding:.6rem 1.1rem;
  background:var(--sand);
  color:var(--deep-900);
  font-family:var(--font-head);
  font-weight:700;
  font-size:.95rem;
  letter-spacing:.1em;
  text-decoration:none;
  border-radius:2px;
  transform:translateY(-240%);
  transition:transform var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0);}

/* ---------- 页头：双层看台 ---------- */
.site-head{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--deep-900);
  border-bottom:1px solid rgba(216,181,106,.18);
  transition:box-shadow var(--ease);
}
.site-head.is-scrolled{box-shadow:0 14px 30px rgba(3,12,20,.6);}

.head-progress{
  display:block;
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:linear-gradient(90deg,var(--sand),var(--amber));
  transform:scaleX(0);
  transform-origin:0 50%;
  pointer-events:none;
}

.head-rail{
  background:var(--deep-800);
  border-bottom:1px solid rgba(216,181,106,.12);
}
.head-rail__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  min-height:42px;
  padding-block:.3rem;
}
.head-brandnote{
  display:flex;
  align-items:center;
  gap:.65rem;
  min-width:0;
}
.head-brandnote__mark{
  position:relative;
  flex:0 0 auto;
  width:26px;
  height:2px;
  border-radius:1px;
  background:linear-gradient(90deg,var(--sand),var(--amber));
}
.head-brandnote__mark::after{
  content:"";
  position:absolute;
  right:-4px;
  top:-2px;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--amber);
}
.head-brandnote__text{
  min-width:0;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.2em;
  color:var(--mist);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.quick-links{
  display:flex;
  align-items:center;
  gap:.95rem;
  flex:0 0 auto;
}
.quick-link{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding-block:.15rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.14em;
  text-decoration:none;
  color:var(--sand-light);
  border-bottom:1px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.quick-link::before{
  content:"";
  width:5px;
  height:5px;
  border-radius:50%;
  background:currentColor;
}
.quick-link:hover,
.quick-link:focus-visible{
  color:var(--sand);
  border-bottom-color:var(--sand);
}
.quick-link--green{color:var(--jade);}
.quick-link--green:hover,
.quick-link--green:focus-visible{
  color:#A3D6C4;
  border-bottom-color:var(--jade);
}

.head-main{
  position:relative;
  background:linear-gradient(180deg,var(--deep-800),var(--deep-900) 78%);
}
.head-main__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1.25rem;
  padding-block:.85rem;
}

.brand{
  display:grid;
  grid-template-columns:auto 1fr;
  grid-template-rows:auto auto;
  column-gap:.6rem;
  row-gap:.1rem;
  align-items:center;
  text-decoration:none;
  color:var(--white);
}
.brand__line{
  grid-row:1 / span 2;
  align-self:stretch;
  width:3px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--sand),var(--amber));
}
.brand__name{
  font-family:var(--font-head);
  font-weight:800;
  font-size:clamp(1.15rem,2.2vw,1.5rem);
  line-height:1.1;
  letter-spacing:.1em;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:.58rem;
  letter-spacing:.3em;
  color:var(--sand);
  line-height:1.2;
}
.brand:hover .brand__sub,
.brand:focus-visible .brand__sub{color:var(--sand-light);}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  padding:.5rem .75rem;
  border:1px solid rgba(216,181,106,.45);
  border-radius:2px;
  color:var(--sand-light);
  cursor:pointer;
  transition:border-color var(--ease),color var(--ease),background-color var(--ease);
}
.nav-toggle:hover{
  border-color:var(--sand);
  color:var(--sand);
  background:rgba(216,181,106,.08);
}
.nav-toggle__bars{
  display:grid;
  gap:4px;
  width:18px;
}
.nav-toggle__bars i{
  display:block;
  height:2px;
  border-radius:1px;
  background:currentColor;
  transition:transform var(--ease);
}
.nav-toggle__label{
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.18em;
}

.site-nav__list{
  display:flex;
  align-items:center;
  gap:.15rem;
}
.site-nav__link{
  display:block;
  padding:.5rem .8rem;
  font-size:.94rem;
  font-weight:600;
  letter-spacing:.03em;
  text-decoration:none;
  color:#CFDEE5;
  border-top:2px solid transparent;
  border-radius:2px;
  transition:color var(--ease),background-color var(--ease),border-color var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible{
  color:var(--sand-light);
  border-top-color:var(--sand);
  background:rgba(216,181,106,.1);
}
.site-nav__link[aria-current="page"]{
  color:var(--deep-900);
  font-weight:700;
  background:linear-gradient(180deg,var(--sand),#CBA455);
  border-top-color:var(--amber);
}

/* ---------- 页脚 ---------- */
.site-foot{
  position:relative;
  background:var(--deep-900);
  color:var(--mist);
  border-top:1px solid rgba(216,181,106,.3);
}
.site-foot::before{
  content:"";
  display:block;
  height:8px;
  background-image:repeating-linear-gradient(90deg,rgba(216,181,106,.45) 0 1px,transparent 1px 14px);
  opacity:.55;
}
.foot-inner{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1.3fr);
  gap:clamp(1.5rem,4vw,3.5rem);
  padding-block:clamp(2rem,5vw,3.5rem);
}
.foot-brand__name{
  font-family:var(--font-head);
  font-weight:800;
  font-size:clamp(1.6rem,3.4vw,2.2rem);
  letter-spacing:.12em;
  line-height:1.1;
  color:var(--white);
}
.foot-brand__sub{
  margin-top:.35rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.26em;
  color:var(--sand);
}
.foot-desc{
  margin-top:1rem;
  max-width:34ch;
  font-size:.92rem;
  line-height:1.85;
  color:rgba(169,188,198,.95);
}
.foot-col__title{
  margin-bottom:.85rem;
  padding-bottom:.6rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:500;
  letter-spacing:.26em;
  color:var(--sand);
  border-bottom:1px solid rgba(216,181,106,.22);
}
.foot-list{display:grid;gap:.55rem;}
.foot-link{
  font-size:.92rem;
  color:rgba(214,228,235,.9);
  text-decoration:none;
  transition:color var(--ease);
}
.foot-link:hover,
.foot-link:focus-visible{
  color:var(--sand-light);
  text-decoration:underline;
  text-underline-offset:4px;
}
.foot-contact{display:grid;gap:.7rem;}
.foot-contact__row{
  display:grid;
  grid-template-columns:3.4em minmax(0,1fr);
  gap:.6rem;
  font-size:.88rem;
  line-height:1.7;
}
.foot-contact__key{
  padding-top:.3em;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.14em;
  color:var(--jade);
}
.foot-contact__val{
  color:#DCE8EE;
  word-break:break-word;
}
.foot-bottom{
  background:rgba(3,12,20,.6);
  border-top:1px solid rgba(169,188,198,.16);
}
.foot-bottom__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.75rem;
  padding-block:1rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  color:rgba(169,188,198,.85);
}
.foot-note{margin:0;}
.foot-icp{margin:0;color:rgba(169,188,198,.68);}

/* ---------- 通用组件 ---------- */
.panel{
  position:relative;
  padding:clamp(1.25rem,3vw,2.4rem);
  background:var(--paper);
  color:var(--ink);
  border-radius:var(--radius);
}
.panel--deep{
  background:linear-gradient(155deg,var(--deep-800),var(--deep-900));
  color:#E4EDF1;
  border:1px solid rgba(216,181,106,.22);
}
.panel--glass{
  background:rgba(255,255,255,.07);
  color:#F2F7F9;
  border:1px solid rgba(255,255,255,.16);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.panel--amber{box-shadow:inset 3px 0 0 var(--amber);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.7rem 1.35rem;
  font-family:var(--font-head);
  font-weight:700;
  font-size:.95rem;
  letter-spacing:.08em;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:2px;
  cursor:pointer;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease);
}
.btn--gold{
  background:var(--sand);
  border-color:var(--sand);
  color:var(--deep-900);
}
.btn--gold:hover,
.btn--gold:focus-visible{
  background:var(--sand-light);
  border-color:var(--sand-light);
}
.btn--gold:focus-visible{outline-color:var(--white);}
.btn--outline{
  background:transparent;
  border-color:rgba(216,181,106,.55);
  color:var(--sand-light);
}
.btn--outline:hover,
.btn--outline:focus-visible{
  border-color:var(--sand);
  color:var(--sand);
  background:rgba(216,181,106,.1);
}
.btn--jade{
  background:var(--jade);
  border-color:var(--jade);
  color:var(--deep-900);
}
.btn--jade:hover,
.btn--jade:focus-visible{
  background:#9ED2BF;
  border-color:#9ED2BF;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.22rem .55rem;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.14em;
  line-height:1.5;
  border:1px solid currentColor;
  border-radius:2px;
}
.tag--amber{color:var(--amber);}
.tag--jade{color:var(--jade);}
.tag--gold{color:var(--sand);}

.section-head{
  display:grid;
  gap:.4rem;
  margin-bottom:clamp(1rem,2.4vw,1.6rem);
}
.section-head__kicker{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.24em;
  color:var(--sand);
}
.section-head__title{
  font-family:var(--font-head);
  font-weight:800;
  font-size:clamp(1.5rem,3.4vw,2.2rem);
  line-height:1.15;
  letter-spacing:.02em;
}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(1rem,2.2vw,1.9rem);
  align-items:start;
}
.col-4{grid-column:span 4;}
.col-6{grid-column:span 6;}
.col-8{grid-column:span 8;}
.col-12{grid-column:span 12;}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border-radius:var(--radius);
  background:linear-gradient(150deg,var(--deep-700),var(--deep-900));
  border:1px solid rgba(216,181,106,.24);
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.06);
  pointer-events:none;
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:16 / 9;}
.media-frame--band{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}

.breadcrumb{margin-bottom:clamp(1rem,2vw,1.5rem);}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.45rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  color:var(--mist);
}
.breadcrumb__item{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  color:rgba(216,181,106,.55);
}
.breadcrumb__link{
  color:var(--mist);
  text-decoration:none;
  transition:color var(--ease);
}
.breadcrumb__link:hover,
.breadcrumb__link:focus-visible{color:var(--sand-light);}
.breadcrumb__current{color:var(--sand);}

.log{
  display:grid;
  border-top:1px solid rgba(216,181,106,.28);
}
.log__item{
  display:grid;
  grid-template-columns:6rem minmax(0,1fr);
  gap:1rem;
  align-items:baseline;
  padding-block:.9rem;
  border-bottom:1px solid rgba(169,188,198,.16);
}
.log__mark{
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.12em;
  color:var(--sand);
}

.hairline{
  height:1px;
  border:0;
  margin:0;
  background:linear-gradient(90deg,rgba(216,181,106,.65),rgba(216,181,106,0));
}

.data-mono{
  font-family:var(--font-mono);
  font-size:.82rem;
  letter-spacing:.06em;
  font-variant-numeric:tabular-nums;
}

.prose{
  max-width:68ch;
  font-size:1rem;
  line-height:1.9;
}
.prose > * + *{margin-top:1em;}
.prose h2,
.prose h3{
  font-family:var(--font-head);
  font-weight:800;
  line-height:1.25;
  letter-spacing:.02em;
  margin-top:1.9em;
}
.prose h2{font-size:clamp(1.3rem,2.6vw,1.7rem);}
.prose h3{font-size:clamp(1.1rem,2.2vw,1.35rem);}
.prose ul,
.prose ol{
  list-style:disc;
  padding-left:1.25em;
}
.prose ol{list-style:decimal;}
.prose li + li{margin-top:.4em;}
.prose a{
  color:inherit;
  text-decoration:underline;
  text-underline-offset:4px;
  text-decoration-color:rgba(216,181,106,.7);
}
.prose a:hover{text-decoration-color:currentColor;}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding-bottom:.15rem;
  font-weight:600;
  color:var(--sand);
  text-decoration:none;
  border-bottom:1px solid rgba(216,181,106,.4);
  transition:color var(--ease),border-color var(--ease);
}
.link-arrow::after{
  content:"→";
  font-family:var(--font-mono);
}
.link-arrow:hover,
.link-arrow:focus-visible{
  color:var(--sand-light);
  border-bottom-color:var(--sand-light);
}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));}
  .col-4,.col-8{grid-column:span 6;}
  .col-6{grid-column:span 3;}
  .foot-inner{grid-template-columns:minmax(0,1fr) minmax(0,1fr);}
  .foot-brand{grid-column:1 / -1;}
}

@media (max-width:899px){
  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    z-index:5;
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    opacity:0;
    background:var(--deep-800);
    border-bottom:1px solid rgba(216,181,106,.3);
    box-shadow:0 20px 34px rgba(3,12,20,.62);
    transition:max-height 280ms ease,opacity 200ms ease,visibility 0s linear 280ms;
  }
  .site-head[data-open] .site-nav{
    max-height:calc(100vh - 130px);
    overflow-y:auto;
    visibility:visible;
    opacity:1;
    transition:max-height 300ms ease,opacity 200ms ease;
  }
  .site-head[data-open] .nav-toggle__bars i:first-child{transform:translateY(3px) rotate(45deg);}
  .site-head[data-open] .nav-toggle__bars i:last-child{transform:translateY(-3px) rotate(-45deg);}
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:.5rem var(--gutter) 1.1rem;
  }
  .site-nav__item + .site-nav__item{border-top:1px solid rgba(169,188,198,.14);}
  .site-nav__link{
    padding:.85rem .75rem;
    font-size:1rem;
    border-top:0;
    border-left:2px solid transparent;
    border-radius:2px;
  }
  .site-nav__link:hover,
  .site-nav__link:focus-visible{
    border-top-color:transparent;
    border-left-color:var(--sand);
  }
  .site-nav__link[aria-current="page"]{
    border-top-color:transparent;
    border-left-color:var(--amber);
  }
}

@media (max-width:640px){
  .grid-12{grid-template-columns:minmax(0,1fr);}
  .col-4,.col-6,.col-8,.col-12{grid-column:1 / -1;}
  .foot-inner{grid-template-columns:minmax(0,1fr);}
  .foot-brand{grid-column:auto;}
  .log__item{grid-template-columns:minmax(0,1fr);gap:.25rem;}
  .foot-bottom__inner{justify-content:flex-start;}
}

@media (max-width:560px){
  .head-brandnote__text{display:none;}
  .head-main__inner{padding-block:.7rem;}
  .quick-links{gap:.75rem;}
  .foot-contact__row{grid-template-columns:3.2em minmax(0,1fr);}
}

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