:root{
  --green:#0E3B33;
  --green-deep:#08201C;
  --gold:#C9A24B;
  --amber:#E2A03C;
  --porcelain:#F6F3EA;
  --cream:#FBF8F0;
  --ink:#1F1D19;
  --moss:#6E867C;
  --line:#DCC89B;
  --state:#4C7A63;

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  --wrap:1280px;
  --radius:2px;
  --dur:160ms;
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-soft:0 1px 2px rgba(31,29,25,.04),0 18px 40px -30px rgba(8,32,28,.42);

  --on-dark:.66;
}

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

html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth;}
}

body{
  margin:0;
  background:var(--porcelain);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.3;
  letter-spacing:-.01em;
  margin:0;
  color:var(--ink);
}
p{margin:0 0 16px;}
p:last-child{margin-bottom:0;}
img{max-width:100%;height:auto;display:block;}
ul,ol{margin:0;padding:0;}
li{list-style:none;}
a{color:var(--green);}
button{font-family:inherit;}
table{border-collapse:collapse;}

:focus-visible{
  outline:2px solid var(--amber);
  outline-offset:3px;
  border-radius:1px;
}
.site-header :focus-visible,
.site-footer :focus-visible{
  outline-color:var(--amber);
}

.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}
.skip-link{
  position:fixed;
  left:16px;top:-72px;
  z-index:200;
  background:var(--gold);
  color:var(--green-deep);
  font-size:13px;
  letter-spacing:.04em;
  padding:10px 16px;
  text-decoration:none;
  border-radius:var(--radius);
  transition:top 140ms var(--ease);
}
.skip-link:focus{top:12px;}

.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:24px;
}
.mono{
  font-family:var(--font-mono);
  letter-spacing:.04em;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  font-size:14px;
  font-weight:500;
  letter-spacing:.03em;
  line-height:1.4;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:var(--radius);
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn--gold{background:var(--gold);color:var(--green-deep);border-color:var(--gold);}
.btn--gold:hover{background:var(--amber);border-color:var(--amber);}
.btn--outline{background:transparent;color:var(--ink);border-color:var(--line);}
.btn--outline:hover{border-color:var(--gold);background:rgba(201,162,75,.1);}
.btn--dark{background:var(--green);color:var(--porcelain);border-color:var(--green);}
.btn--dark:hover{background:var(--green-deep);border-color:var(--green-deep);}

/* ---------- 标签与分隔线 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  padding:4px 9px;
  border:1px solid var(--line);
  color:var(--moss);
  background:var(--cream);
  border-radius:1px;
}
.tag--amber{border-color:rgba(226,160,60,.55);color:#8E5C0C;background:rgba(226,160,60,.12);}
.tag--moss{border-color:rgba(76,122,99,.45);color:var(--state);background:rgba(76,122,99,.09);}

.rule{border:0;border-top:1px solid var(--line);margin:32px 0;}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 22px;
  padding:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--moss);
}
.breadcrumbs__link{color:var(--moss);text-decoration:none;transition:color var(--dur) var(--ease);}
.breadcrumbs__link:hover{color:var(--green);}
.breadcrumbs__sep{color:var(--line);}
.breadcrumbs__current{color:var(--ink);}

/* ---------- 页面题头 ---------- */
.page-head{
  padding-block:56px 32px;
  border-bottom:1px solid var(--line);
  margin-bottom:48px;
}
.page-head__title{
  font-size:clamp(30px,4.4vw,44px);
  margin:0 0 14px;
}
.page-head__lead{
  max-width:62ch;
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  margin:0 0 16px;
}
.page-head__meta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--moss);
  margin:0;
  display:flex;
  flex-wrap:wrap;
  gap:8px 16px;
}

/* ---------- 章节 ---------- */
.section{padding-block:56px;}
.section__index{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
  margin:0 0 10px;
}
.section__title{
  font-size:clamp(24px,2.9vw,32px);
  margin:0 0 12px;
}
.section__lead{
  max-width:62ch;
  margin:0;
  font-size:16.5px;
  line-height:1.8;
  color:var(--ink);
}

/* ---------- 正文 ---------- */
.prose{
  max-width:68ch;
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
}
.prose h2{
  font-size:clamp(22px,2.6vw,30px);
  margin:48px 0 16px;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.prose h3{font-size:20px;margin:32px 0 12px;}
.prose p{margin:0 0 16px;}
.prose ul,.prose ol{padding-left:22px;margin:0 0 20px;}
.prose ul li{list-style:square;}
.prose ol li{list-style:decimal;}
.prose li{margin-bottom:8px;line-height:1.8;}
.prose a{
  color:var(--green);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-color:var(--line);
  transition:text-decoration-color var(--dur) var(--ease);
}
.prose a:hover{text-decoration-color:var(--gold);}
.prose strong{font-weight:600;}

/* ---------- 面板 ---------- */
.panel{
  background:var(--cream);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow-soft);
}

/* ---------- 表格 ---------- */
.data-table{width:100%;font-size:14.5px;}
.data-table caption{
  text-align:left;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--moss);
  padding-bottom:12px;
}
.data-table th,
.data-table td{
  padding:12px 16px;
  border-bottom:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}
.data-table th{
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--green);
  background:var(--cream);
}
.data-table td.num,
.data-table th.num{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
}
.data-table tbody tr{transition:background-color var(--dur) var(--ease);}
.data-table tbody tr:hover{background:var(--cream);}

/* ---------- 锚点导航 ---------- */
.anchor-nav{
  position:sticky;
  top:132px;
  font-size:13px;
}
.anchor-nav__title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--moss);
  margin:0 0 12px;
}
.anchor-nav__list{
  list-style:none;
  border-left:1px solid var(--line);
  display:grid;
  gap:2px;
}
.anchor-nav__link{
  display:block;
  padding:7px 0 7px 14px;
  margin-left:-1px;
  border-left:2px solid transparent;
  color:var(--moss);
  text-decoration:none;
  line-height:1.5;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.anchor-nav__link:hover{color:var(--green);border-left-color:var(--gold);}
.anchor-nav__link[aria-current="true"]{color:var(--ink);border-left-color:var(--amber);}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:24px;}
.grid--split{grid-template-columns:5fr 7fr;}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr));}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background:var(--green);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.media-frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:10px 14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--porcelain);
  background:linear-gradient(180deg,rgba(8,32,28,0) 0%,rgba(8,32,28,.82) 100%);
}
.media-frame--wide{aspect-ratio:16/9;}
.media-frame--tall{aspect-ratio:3/4;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame--band{aspect-ratio:21/9;}
.media-frame--empty{
  display:grid;
  place-items:center;
  aspect-ratio:16/9;
  background:repeating-linear-gradient(135deg,rgba(201,162,75,.10) 0 1px,rgba(14,59,51,.7) 1px 14px);
}
.media-frame--empty::after{
  content:attr(data-label);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(246,243,234,.6);
}

/* ---------- 显现 ---------- */
.reveal{
  opacity:0;
  transform:translateY(8px);
  transition:opacity 260ms var(--ease),transform 260ms var(--ease);
}
.reveal.is-visible{opacity:1;transform:none;}

/* ================= 页头 ================= */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--green);
  color:var(--porcelain);
  border-bottom:1px solid rgba(201,162,75,.42);
  box-shadow:0 20px 40px -34px rgba(8,32,28,.9);
}
.topline{
  background:var(--green-deep);
  border-bottom:1px solid rgba(201,162,75,.18);
}
.topline__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:34px;
}
.topline__notice{
  margin:0;
  font-size:12px;
  letter-spacing:.02em;
  line-height:1.4;
  color:rgba(246,243,234,.62);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.topline__tag{
  margin:0;
  flex-shrink:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--gold);
}

.command-bar{position:relative;}
.command-bar__inner{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:74px;
  padding-block:11px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
  text-decoration:none;
  color:inherit;
}
.brand__mark{
  width:38px;
  height:38px;
  flex-shrink:0;
  display:grid;
  place-items:center;
  border:1px solid var(--gold);
  color:var(--gold);
  font-family:var(--font-display);
  font-size:19px;
  font-weight:600;
  line-height:1;
  border-radius:1px;
}
.brand__text{display:flex;flex-direction:column;gap:2px;}
.brand__name{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:600;
  letter-spacing:.07em;
  line-height:1.15;
  color:var(--porcelain);
}
.brand__tagline{
  font-size:11px;
  line-height:1.2;
  letter-spacing:.04em;
  color:rgba(246,243,234,.58);
}

.primary-nav{margin-left:auto;}
.primary-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  counter-reset:nav;
}
.primary-nav__item{display:block;}
.primary-nav__link{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:8px 11px;
  font-size:14px;
  letter-spacing:.02em;
  line-height:1.4;
  color:rgba(246,243,234,.78);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.primary-nav__link::before{
  counter-increment:nav;
  content:counter(nav,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.08em;
  color:rgba(201,162,75,.62);
}
.primary-nav__link:hover{
  color:var(--porcelain);
  border-bottom-color:var(--gold);
  background:rgba(201,162,75,.07);
}
.primary-nav__link[aria-current="page"]{
  color:var(--amber);
  border-bottom-color:var(--amber);
}
.primary-nav__link[aria-current="page"]::before{color:var(--amber);}

.command-bar__actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}

.index-button{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 12px;
  background:rgba(246,243,234,.04);
  border:1px solid rgba(201,162,75,.34);
  border-radius:var(--radius);
  color:rgba(246,243,234,.7);
  font-size:12px;
  letter-spacing:.02em;
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.index-button:hover{
  border-color:var(--gold);
  color:var(--porcelain);
  background:rgba(201,162,75,.09);
}
.index-button__key{
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.5;
  padding:0 5px;
  border:1px solid rgba(201,162,75,.42);
  border-radius:1px;
  color:var(--gold);
}
.index-button__label{white-space:nowrap;}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  background:transparent;
  border:1px solid rgba(201,162,75,.34);
  border-radius:var(--radius);
  color:var(--porcelain);
  font-size:13px;
  letter-spacing:.04em;
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);background:rgba(201,162,75,.09);}
.nav-toggle__box{display:grid;gap:4px;width:16px;}
.nav-toggle__bar{
  display:block;
  height:1px;
  background:currentColor;
  transform-origin:center;
  transition:transform var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child{transform:translateY(2.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:last-child{transform:translateY(-2.5px) rotate(-45deg);}

.index-panel{
  position:absolute;
  left:0;right:0;top:100%;
  z-index:5;
  background:var(--cream);
  color:var(--ink);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  box-shadow:0 28px 48px -34px rgba(8,32,28,.55);
}
.index-panel[hidden]{display:none;}
.index-panel__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-start;
  gap:18px 40px;
  padding-block:24px 22px;
}
.index-panel__title{
  flex:0 0 100%;
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--moss);
}
.index-panel__list{
  flex:1 1 520px;
  display:grid;
  grid-template-columns:repeat(2,minmax(160px,1fr));
  gap:1px;
}
.index-panel__item{
  display:flex;
  align-items:center;
  gap:10px;
  padding:11px 13px;
  background:var(--porcelain);
  border:1px solid var(--line);
  border-radius:1px;
  color:var(--ink);
  font-size:14px;
  text-decoration:none;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.index-panel__item:hover{background:#fff;border-color:var(--gold);}
.index-panel__num{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--gold);
}
.index-panel__hint{
  flex:1 1 240px;
  align-self:center;
  margin:0;
  font-size:12.5px;
  line-height:1.8;
  color:var(--moss);
}
.index-panel__hint kbd{
  font-family:var(--font-mono);
  font-size:11px;
  padding:1px 5px;
  border:1px solid var(--line);
  background:var(--porcelain);
  border-radius:1px;
  color:var(--green);
}

.scroll-progress{
  height:2px;
  width:0;
  background:linear-gradient(90deg,var(--gold) 0%,var(--amber) 100%);
}

/* ================= 页脚 ================= */
.site-footer{
  background:var(--green-deep);
  color:rgba(246,243,234,.78);
  border-top:1px solid rgba(201,162,75,.32);
}
.footer__top{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1fr;
  gap:40px 32px;
  padding-block:64px 42px;
}
.footer__brand-tag{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold);
}
.footer__brand-name{
  margin:0 0 12px;
  font-family:var(--font-display);
  font-size:22px;
  font-weight:600;
  letter-spacing:.09em;
  color:var(--porcelain);
}
.footer__brand-note{
  margin:0;
  max-width:34ch;
  font-size:14px;
  line-height:1.8;
  color:rgba(246,243,234,.6);
}
.footer__col-title{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--gold);
}
.footer__links{display:grid;gap:11px;}
.footer__link{
  display:inline-block;
  font-size:14px;
  line-height:1.6;
  color:rgba(246,243,234,.74);
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer__link:hover{color:var(--porcelain);border-bottom-color:var(--gold);}

.footer__contact{
  display:grid;
  gap:8px;
  padding-block:24px;
  border-top:1px solid rgba(201,162,75,.2);
}
.footer__contact-line{
  margin:0;
  font-size:13px;
  line-height:1.8;
  color:rgba(246,243,234,.68);
  letter-spacing:.01em;
}
.footer__hours{
  margin:0;
  font-size:12.5px;
  line-height:1.8;
  color:rgba(246,243,234,.48);
}

.footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-block:20px 28px;
  border-top:1px solid rgba(201,162,75,.2);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:rgba(246,243,234,.5);
}
.footer__icp,.footer__copy{display:inline-block;}

/* ================= 响应式 ================= */
@media (max-width:1120px){
  .index-button__label{display:none;}
  .primary-nav__link{padding:8px 9px;font-size:13.5px;}
  .brand__tagline{display:none;}
}

@media (max-width:960px){
  .nav-toggle{display:inline-flex;}
  .command-bar__actions{margin-left:auto;}
  .primary-nav{
    position:absolute;
    left:0;right:0;top:100%;
    margin-left:0;
    background:var(--green-deep);
    border-top:1px solid rgba(201,162,75,.24);
    border-bottom:1px solid rgba(201,162,75,.38);
    max-height:0;
    overflow:hidden;
    transition:max-height 220ms var(--ease);
  }
  .primary-nav[data-open]{
    max-height:80vh;
    overflow-y:auto;
  }
  .primary-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:8px 24px 20px;
  }
  .primary-nav__link{
    width:100%;
    padding:14px 4px;
    font-size:16px;
    border-bottom:1px solid rgba(201,162,75,.16);
    border-left:1px solid transparent;
  }
  .primary-nav__link::before{font-size:11px;}
  .primary-nav__link[aria-current="page"]{
    border-bottom-color:rgba(226,160,60,.5);
    background:rgba(226,160,60,.08);
  }
  .index-panel__list{grid-template-columns:repeat(2,minmax(140px,1fr));}
  .grid--split{grid-template-columns:1fr;}
  .grid--thirds{grid-template-columns:repeat(2,minmax(0,1fr));}
  .anchor-nav{position:static;top:auto;margin-bottom:32px;}
  .footer__top{grid-template-columns:1fr 1fr;gap:36px 24px;padding-block:52px 36px;}
  .footer__brand{grid-column:1 / -1;}
}

@media (max-width:720px){
  body{font-size:16px;}
  .wrap{padding-inline:16px;}
  .command-bar__inner{min-height:64px;gap:10px;}
  .brand__mark{width:34px;height:34px;font-size:17px;}
  .brand__name{font-size:16px;letter-spacing:.05em;}
  .page-head{padding-block:40px 24px;margin-bottom:36px;}
  .section{padding-block:40px;}
  .index-panel__list{grid-template-columns:1fr;}
  .grid--halves,.grid--thirds{grid-template-columns:1fr;}
  .footer__top{grid-template-columns:1fr;gap:32px;}
  .footer__legal{flex-direction:column;align-items:flex-start;gap:8px;}
}

@media (max-width:540px){
  .command-bar__actions .btn{display:none;}
  .nav-toggle__text{display:none;}
  .nav-toggle{padding:8px 10px;}
  .topline__notice{font-size:11px;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none;}
  .skip-link{transition:none;}
}