/* ========== 1. 变量与重置 ========== */
:root{
  --paper:#F4EDE0;
  --ink:#1B1410;
  --felt:#123A32;
  --cyan:#2FD5C8;
  --orange:#FF7A33;
  --gold:#E8B23A;
  --brick:#B03A2E;
  --mist:#CBD6D0;
  --night:#0E2230;
  --ink-soft:#3D332C;
  --line:rgba(27,20,16,.22);
  --maxw:1180px;
  --shadow-hard:6px 6px 0 var(--ink);
  --shadow-sm:3px 3px 0 var(--ink);
  --font-display:"Noto Serif SC","Songti SC","SimSun",serif;
  --font-label:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,"Courier New",monospace;
  --nav-break:900px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--paper);
  background-image:repeating-linear-gradient(0deg,rgba(27,20,16,.045) 0 1px,transparent 1px 40px);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0}
img,svg{max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}
::selection{background:var(--orange);color:var(--ink)}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}
.site-footer :focus-visible{outline-color:var(--gold)}

/* ========== 2. 基础排版与工具 ========== */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:16px;
}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
  font-size:.94em;
}
.skip-link{
  position:absolute;
  top:-64px;
  left:12px;
  z-index:200;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-label);
  font-weight:700;
  font-size:14px;
  letter-spacing:.04em;
  padding:10px 18px;
  border:2px solid var(--orange);
  box-shadow:var(--shadow-sm);
  text-decoration:none;
  transition:top .2s ease;
}
.skip-link:focus{top:12px}

/* ========== 3. 页头：档案命令栏 ========== */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--paper);
  border-bottom:3px solid var(--ink);
}
.announce{
  background:var(--brick);
  color:var(--paper);
  border-bottom:2px solid var(--ink);
  overflow:hidden;
  max-height:80px;
  transition:max-height .3s ease,opacity .2s ease;
}
.announce__inner{
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  padding-block:9px;
  font-size:13px;
  line-height:1.5;
}
.announce__tag{
  flex:none;
  font-family:var(--font-label);
  font-weight:700;
  font-size:11px;
  letter-spacing:.14em;
  background:var(--ink);
  color:var(--paper);
  padding:2px 8px;
  border:1px solid var(--paper);
}
.announce__text{flex:1 1 260px;min-width:0;margin:0}
.announce__time{
  flex:none;
  font-size:11.5px;
  padding:2px 8px;
  border:1px solid rgba(244,237,224,.55);
  background:rgba(27,20,16,.22);
}
.cmdbar{position:relative;background:var(--paper)}
.cmdbar__inner{
  display:flex;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
  padding-block:10px;
  transition:padding .2s ease;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  color:var(--ink);
  flex:none;
}
.brand__mark{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:12.5px;
  letter-spacing:.08em;
  line-height:1;
  background:var(--ink);
  color:var(--gold);
  padding:8px 9px;
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--orange);
}
.brand__text{display:flex;flex-direction:column;line-height:1.2}
.brand__name{
  font-family:var(--font-label);
  font-weight:700;
  font-size:16px;
  letter-spacing:.06em;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  color:var(--brick);
  margin-top:2px;
}
.cmdnav{margin-inline-start:auto;min-width:0}
.cmdnav__list{display:flex;flex-wrap:wrap;gap:2px;list-style:none}
.cmdnav__item{display:block}
.cmdnav__link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 9px;
  font-family:var(--font-label);
  font-weight:700;
  font-size:13px;
  letter-spacing:.02em;
  text-decoration:none;
  color:var(--ink);
  border:2px solid transparent;
  border-bottom:2px solid var(--line);
  transition:background .16s ease,border-color .16s ease,color .16s ease,transform .16s ease;
}
.cmdnav__idx{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.06em;
  color:var(--brick);
  padding:0 2px;
}
.cmdnav__link:hover,
.cmdnav__link:focus-visible{
  background:var(--mist);
  border-color:var(--ink);
  transform:translateY(-1px);
}
.cmdnav__link[aria-current="page"]{
  background:var(--ink);
  color:var(--paper);
  border-color:var(--ink);
}
.cmdnav__link[aria-current="page"] .cmdnav__idx{
  background:var(--orange);
  color:var(--ink);
  padding:1px 4px;
  font-weight:700;
}
.cmdbar__actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:none;
  margin-inline-start:auto;
}
.scrollrail{
  height:4px;
  background:var(--mist);
  overflow:hidden;
}
.scrollrail__fill{
  display:block;
  height:100%;
  width:calc(var(--p,0) * 100%);
  background-image:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:width .1s linear;
}
.site-header[data-scrolled="true"] .announce{max-height:0;opacity:0;border-bottom-width:0}
.site-header[data-scrolled="true"] .cmdbar__inner{padding-block:6px}
.site-header[data-scrolled="true"] .brand__sub{display:none}

/* 移动导航按钮 */
.navtoggle{
  display:none;
  align-items:center;
  gap:9px;
  background:var(--ink);
  color:var(--paper);
  border:2px solid var(--ink);
  padding:8px 11px;
  cursor:pointer;
  box-shadow:3px 3px 0 var(--orange);
  font-family:var(--font-label);
  font-weight:700;
  font-size:13px;
  letter-spacing:.08em;
  transition:transform .15s ease,box-shadow .15s ease;
}
.navtoggle:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--orange)}
.navtoggle__bars{
  display:block;
  width:18px;
  height:2px;
  background:currentColor;
  box-shadow:0 -6px 0 currentColor,0 6px 0 currentColor;
}
.navtoggle[aria-expanded="true"]{background:var(--orange);color:var(--ink)}
.navtoggle[aria-expanded="true"] .navtoggle__bars{
  background:var(--ink);
  box-shadow:0 -6px 0 var(--ink),0 6px 0 var(--ink);
  transform:rotate(90deg);
}
.navtoggle[aria-expanded="true"] .navtoggle__label{letter-spacing:.14em}

@media (max-width:1080px){
  .cmdnav__link{font-size:12.5px;padding:6px 7px}
  .brand__name{font-size:15px}
}
@media (max-width:var(--nav-break)){
  .cmdbar__inner{justify-content:space-between;gap:10px}
  .cmdbar__actions{margin-inline-start:0}
  .navtoggle{display:inline-flex}
  .cmdnav{
    display:none;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    margin:0;
    padding:10px 16px 14px;
    background:var(--paper);
    border-top:2px solid var(--ink);
    border-bottom:3px solid var(--ink);
    box-shadow:0 10px 0 rgba(27,20,16,.18);
    max-height:min(70vh,520px);
    overflow-y:auto;
    z-index:5;
  }
  .cmdnav[data-open="true"]{display:block;animation:navdrop .18s ease-out}
  .cmdnav__list{flex-direction:column;gap:0}
  .cmdnav__item{width:100%;border-bottom:1px solid var(--line)}
  .cmdnav__item:last-child{border-bottom:0}
  .cmdnav__link{
    width:100%;
    justify-content:flex-start;
    border:0;
    border-left:4px solid transparent;
    padding:11px 8px;
    font-size:15px;
  }
  .cmdnav__link:hover,
  .cmdnav__link:focus-visible{border-color:var(--ink);transform:none}
  .cmdnav__link[aria-current="page"]{border-left-color:var(--orange)}
  .cmdnav__idx{font-size:12px;min-width:26px}
}
@keyframes navdrop{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
@media (max-width:520px){
  .brand__mark{font-size:11.5px;padding:7px}
  .brand__name{font-size:14px}
  .btn--primary{padding:8px 12px;font-size:13px}
  .announce__time{display:none}
}

/* ========== 4. 按钮 ========== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-family:var(--font-label);
  font-weight:700;
  font-size:14px;
  letter-spacing:.04em;
  line-height:1.2;
  padding:10px 16px;
  border:2px solid var(--ink);
  background:var(--paper);
  color:var(--ink);
  text-decoration:none;
  cursor:pointer;
  box-shadow:4px 4px 0 var(--ink);
  transition:transform .15s ease,box-shadow .15s ease,background .15s ease;
}
.btn:hover{transform:translate(-1px,-2px);box-shadow:6px 7px 0 var(--ink)}
.btn:active{transform:translate(1px,1px);box-shadow:2px 2px 0 var(--ink)}
.btn--primary{background:var(--orange);color:var(--ink)}
.btn--dark{background:var(--ink);color:var(--paper)}
.btn--dark:hover{box-shadow:6px 7px 0 var(--brick)}
.btn--ghost{background:transparent;box-shadow:none;border-style:dashed}
.btn--ghost:hover{background:var(--mist);box-shadow:none;transform:none}
.btn--sm{font-size:12.5px;padding:7px 11px;box-shadow:3px 3px 0 var(--ink)}

/* ========== 5. 通用布局与组件 ========== */
.section{padding-block:clamp(30px,5vw,60px)}
.section__head{
  display:grid;
  gap:8px;
  margin-bottom:22px;
  padding-left:14px;
  border-left:6px solid var(--orange);
}
.section__eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--brick);
}
.section__title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(26px,3.4vw,42px);
  line-height:1.15;
  margin:0;
}
.section__lead{max-width:62ch;font-size:16px;color:var(--ink-soft)}
.grid{display:grid;gap:18px;grid-template-columns:minmax(0,1fr)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.stack{display:flex;flex-direction:column;gap:16px}
@media (max-width:860px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
}
.panel{
  background:var(--paper);
  border:3px solid var(--ink);
  box-shadow:var(--shadow-hard);
  padding:20px;
  min-width:0;
}
.panel--felt{background:var(--felt);color:var(--paper);border-color:var(--ink)}
.panel--night{background:var(--night);color:var(--paper);border-color:var(--ink)}
.panel__label{
  display:inline-block;
  font-family:var(--font-label);
  font-weight:700;
  font-size:11px;
  letter-spacing:.16em;
  color:var(--brick);
  border-bottom:2px solid currentColor;
  padding-bottom:2px;
  margin-bottom:10px;
}
.panel--felt .panel__label,
.panel--night .panel__label{color:var(--gold)}
.panel__title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(19px,2.3vw,26px);
  line-height:1.25;
  margin:0 0 8px;
}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-block:0 18px}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-label);
  font-weight:700;
  font-size:13px;
  letter-spacing:.04em;
  padding:6px 12px;
  border:2px solid var(--ink);
  background:var(--paper);
  color:var(--ink);
  cursor:pointer;
  box-shadow:3px 3px 0 rgba(27,20,16,.85);
  transition:transform .15s ease,box-shadow .15s ease,background .15s ease;
}
.chip:hover{transform:translateY(-2px);box-shadow:4px 6px 0 rgba(27,20,16,.85)}
.chip[aria-pressed="true"]{background:var(--cyan);box-shadow:3px 3px 0 var(--ink)}
.tag{
  display:inline-block;
  font-family:var(--font-label);
  font-weight:700;
  font-size:11px;
  letter-spacing:.1em;
  padding:2px 8px;
  border:2px solid var(--ink);
  background:var(--gold);
  color:var(--ink);
}
.tag--cyan{background:var(--cyan)}
.tag--brick{background:var(--brick);color:var(--paper)}
.breadcrumbs{padding-block:14px 0;font-family:var(--font-mono);font-size:12px}
.breadcrumbs__list{display:flex;flex-wrap:wrap;gap:8px;list-style:none}
.breadcrumbs__item{display:flex;align-items:center;gap:8px}
.breadcrumbs__link{
  color:var(--felt);
  text-decoration:none;
  border-bottom:2px solid var(--cyan);
  padding-bottom:1px;
}
.breadcrumbs__link:hover{background:var(--cyan);color:var(--ink)}
.breadcrumbs__sep{color:var(--brick)}
.prose{max-width:68ch;font-size:17px;line-height:1.75}
.prose > * + *{margin-top:1.2em}
.prose h2,.prose h3{
  font-family:var(--font-display);
  line-height:1.25;
  margin-top:1.8em;
  padding-left:12px;
  border-left:5px solid var(--orange);
}
.prose h2{font-size:28px}
.prose h3{font-size:22px}
.prose ul,.prose ol{padding-left:1.3em}
.prose li + li{margin-top:.4em}
.prose a{color:var(--felt);text-decoration:none;border-bottom:2px solid var(--cyan)}
.prose a:hover{background:var(--cyan);color:var(--ink)}
.prose blockquote{
  border-left:5px solid var(--brick);
  background:rgba(203,214,208,.4);
  padding:12px 16px;
  font-family:var(--font-display);
}
.kvlist{list-style:none;border-top:2px solid var(--ink)}
.kvlist__row{
  display:grid;
  grid-template-columns:minmax(110px,.9fr) 1.1fr;
  gap:12px;
  align-items:baseline;
  padding:10px 0;
  border-bottom:1px solid var(--line);
}
.kvlist__key{
  font-family:var(--font-label);
  font-weight:700;
  font-size:13px;
  letter-spacing:.06em;
}
.kvlist__val{font-family:var(--font-mono);font-size:14px;font-variant-numeric:tabular-nums}
.meter{display:block}
.meter__label{
  display:flex;
  justify-content:space-between;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  margin-bottom:6px;
}
.meter__track{
  height:14px;
  background:var(--mist);
  border:2px solid var(--ink);
  overflow:hidden;
}
.meter__fill{
  display:block;
  height:100%;
  width:var(--value,0%);
  background-image:repeating-linear-gradient(90deg,var(--cyan) 0 12px,#1FA79D 12px 14px);
  transition:width .48s ease;
}
.meter--orange .meter__fill{background-image:repeating-linear-gradient(90deg,var(--orange) 0 12px,#D2611F 12px 14px)}

/* 图片容器：页面阶段放置占位或真实图片 */
.media{
  position:relative;
  margin:0;
  border:3px solid var(--ink);
  box-shadow:var(--shadow-hard);
  background:var(--mist);
  overflow:hidden;
}
.media img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:4/3;
  object-fit:cover;
  background:repeating-linear-gradient(135deg,rgba(27,20,16,.12) 0 10px,transparent 10px 20px);
}
.media--wide img{aspect-ratio:16/9}
.media--tall img{aspect-ratio:3/4}
.media--tape::before{
  content:"";
  position:absolute;
  z-index:2;
  top:-9px;
  left:18px;
  width:74px;
  height:22px;
  background:rgba(232,178,58,.82);
  border:1px solid rgba(27,20,16,.5);
  transform:rotate(-4deg);
}
.media__caption{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  padding:8px 10px;
  border-top:2px solid var(--ink);
  background:var(--paper);
  color:var(--ink-soft);
}

/* ========== 6. 页脚：墨绿封底 ========== */
.site-footer{
  position:relative;
  margin-top:clamp(32px,6vw,72px);
  background:var(--felt);
  background-image:radial-gradient(circle at 12% 8%,rgba(47,213,200,.14),transparent 42%),
                   radial-gradient(circle at 88% 0%,rgba(255,122,51,.14),transparent 46%);
  color:var(--paper);
  border-top:3px solid var(--ink);
}
.footer__edge{
  height:10px;
  background-image:repeating-linear-gradient(90deg,var(--gold) 0 14px,var(--ink) 14px 28px,var(--brick) 28px 42px,var(--ink) 42px 56px);
}
.footer__top{
  display:grid;
  grid-template-columns:1.5fr repeat(4,1fr);
  gap:28px;
  padding-block:44px 26px;
}
.footer__brand{min-width:0}
.footer__mark{
  display:inline-block;
  font-family:var(--font-mono);
  font-weight:700;
  font-size:12.5px;
  letter-spacing:.1em;
  padding:6px 9px;
  border:2px solid var(--gold);
  color:var(--gold);
  margin-bottom:12px;
}
.footer__brandname{
  font-family:var(--font-display);
  font-weight:700;
  font-size:24px;
  line-height:1.2;
  letter-spacing:.04em;
}
.footer__tagline{
  margin-top:8px;
  font-size:13px;
  line-height:1.7;
  color:var(--mist);
  max-width:26ch;
}
.footer__time{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:14px;
  font-size:11.5px;
  letter-spacing:.06em;
  padding:3px 9px;
  border:1px solid rgba(232,178,58,.6);
  color:var(--gold);
}
.footer__dot{
  width:8px;
  height:8px;
  background:var(--orange);
  box-shadow:0 0 0 3px rgba(255,122,51,.25);
}
.footer__col{min-width:0}
.footer__coltitle{
  font-family:var(--font-label);
  font-weight:700;
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--gold);
  margin:0 0 12px;
  padding-left:10px;
  border-left:4px solid var(--orange);
}
.footer__list{list-style:none;display:flex;flex-direction:column;gap:8px}
.footer__link{
  display:inline-block;
  font-size:13.5px;
  color:#E4ECE7;
  text-decoration:none;
  border-bottom:2px solid transparent;
  transition:color .15s ease,border-color .15s ease,transform .15s ease;
}
.footer__link:hover,.footer__link:focus-visible{
  color:var(--paper);
  border-bottom-color:var(--cyan);
  transform:translateX(2px);
}
.footer__meta{
  display:grid;
  gap:6px;
  padding-block:18px;
  border-top:2px dashed rgba(244,237,224,.32);
  font-size:13px;
  color:var(--mist);
}
.footer__contact{line-height:1.8}
.footer__contact .mono{color:var(--cyan);letter-spacing:.03em}
.footer__address{font-size:12.5px;letter-spacing:.02em}
.footer__bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 20px;
  padding-block:16px 30px;
  border-top:2px solid rgba(244,237,224,.22);
  font-size:12px;
  color:var(--mist);
}
.footer__record{max-width:62ch}
.footer__copy{font-family:var(--font-mono);letter-spacing:.04em;color:var(--gold)}

@media (max-width:1024px){
  .footer__top{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .footer__brand{grid-column:1 / -1}
  .footer__tagline{max-width:46ch}
}
@media (max-width:560px){
  .footer__top{grid-template-columns:minmax(0,1fr);padding-block:32px 20px}
  .footer__brandname{font-size:21px}
  .footer__bottom{flex-direction:column}
}

/* ========== 7. 动效降级 ========== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .btn:hover,.chip:hover,.cmdnav__link:hover,.footer__link:hover{transform:none}
  .meter__fill{transition:none}
}