*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd,address{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,picture{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
table{border-collapse:collapse;width:100%;}

:root{
  --deep:#0E2A47;
  --deep-lift:#16436B;
  --copper:#B8863B;
  --sand:#D9D1C4;
  --signal:#F26A2E;
  --stone:#6E7472;
  --moss:#5F7461;
  --clay:#A96045;
  --cream:#F4EFE6;
  --ink:#13202C;
  --mist:#C9D6DF;
  --line:rgba(19,32,44,.14);
  --line-soft:rgba(19,32,44,.08);
  --strip-h:32px;
  --wrap:1280px;
  --radius:2px;
  --font-display:"Oswald","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","Noto Sans Mono",ui-monospace,SFMono-Regular,Consolas,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

body{
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
@media (min-width:900px){body{font-size:17px;}}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:700;
  font-stretch:88%;
  line-height:1.06;
  letter-spacing:-.012em;
  color:var(--deep);
  text-wrap:balance;
  margin-bottom:.55em;
}
h1{font-size:clamp(2.1rem,5.4vw,4.2rem);line-height:1;}
h2{font-size:clamp(1.6rem,3.1vw,2.4rem);}
h3{font-size:clamp(1.15rem,1.9vw,1.55rem);line-height:1.2;}
h4{font-size:1.02rem;letter-spacing:.01em;line-height:1.35;}

a{color:var(--deep);text-underline-offset:.22em;text-decoration-thickness:1px;}
a:hover{color:var(--deep-lift);}
strong,b{font-weight:700;color:var(--deep);}
::selection{background:var(--copper);color:var(--cream);}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;}

.container{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(18px,4vw,48px);}
.container--narrow{max-width:840px;}
.visually-hidden{position:absolute!important;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;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

.skip-link{
  position:fixed;left:12px;top:-72px;z-index:400;
  padding:11px 18px;background:var(--deep);color:var(--cream);
  font-size:.86rem;text-decoration:none;border-radius:var(--radius);
  border:1px solid var(--copper);
  transition:top .22s var(--ease);
}
.skip-link:focus{top:12px;color:var(--cream);}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;
  top:calc(var(--strip-h) * -1);
  z-index:90;
}
.header-strip{
  height:var(--strip-h);
  background:var(--deep);
  color:var(--sand);
  border-bottom:1px solid rgba(184,134,59,.35);
}
.header-strip-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;height:100%;
}
.strip-label{
  font-family:var(--font-mono);
  font-size:.7rem;letter-spacing:.18em;
  color:rgba(244,239,230,.72);
  white-space:nowrap;
}
.strip-right{display:flex;align-items:center;gap:14px;}
.utility-note{
  font-size:.72rem;letter-spacing:.1em;
  color:rgba(244,239,230,.58);
  white-space:nowrap;
}
.header-cta{
  display:inline-flex;align-items:center;
  padding:3px 11px;
  font-size:.72rem;letter-spacing:.06em;
  color:var(--cream);background:var(--copper);
  text-decoration:none;border-radius:var(--radius);
  transition:background-color .2s var(--ease);
}
.header-cta:hover{background:var(--signal);color:#fff;}

.header-main{
  position:relative;
  background:var(--cream);
  border-bottom:1px solid var(--line);
  box-shadow:0 12px 24px -22px rgba(19,32,44,.9);
}
.header-main-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:clamp(12px,2vw,28px);
  min-height:68px;
  padding-block:10px;
}

.brand{
  display:inline-flex;align-items:center;gap:12px;
  text-decoration:none;color:var(--deep);
  flex:0 0 auto;min-width:0;
}
.brand-mark{
  display:grid;place-items:center;
  width:38px;height:38px;flex:0 0 auto;
  background:var(--deep);color:var(--cream);
  font-family:var(--font-mono);font-size:.76rem;letter-spacing:.05em;
  border:1px solid var(--copper);
  border-radius:var(--radius);
  box-shadow:inset 0 0 0 3px var(--deep),inset 0 0 0 4px rgba(184,134,59,.45);
}
.brand-text{display:block;min-width:0;}
.brand-title{
  display:block;
  font-family:var(--font-display);font-weight:700;
  font-size:1.02rem;line-height:1.12;letter-spacing:.02em;
}
.brand-sub{
  display:block;
  font-family:var(--font-mono);
  font-size:.64rem;line-height:1.4;letter-spacing:.12em;
  color:var(--copper);
}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 12px;
  font-size:.8rem;letter-spacing:.06em;
  color:var(--deep);
  border:1px solid rgba(14,42,71,.28);
  border-radius:var(--radius);
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--deep);background:rgba(14,42,71,.05);}
.nav-toggle-label{font-weight:500;}
.nav-toggle-bars{
  position:relative;display:block;
  width:16px;height:2px;background:var(--deep);
  transition:background-color .22s var(--ease);
}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;
  width:16px;height:2px;background:var(--deep);
  transition:transform .22s var(--ease),top .22s var(--ease);
}
.nav-toggle-bars::before{top:-5px;}
.nav-toggle-bars::after{top:5px;}
.site-header[data-open="true"] .nav-toggle-bars{background:transparent;}
.site-header[data-open="true"] .nav-toggle-bars::before{top:0;transform:rotate(45deg);}
.site-header[data-open="true"] .nav-toggle-bars::after{top:0;transform:rotate(-45deg);}

.site-nav{min-width:0;background:var(--cream);}
.nav-inner{display:flex;align-items:center;gap:8px;}
.nav-list{display:flex;align-items:center;gap:2px;}
.nav-list a{
  position:relative;
  display:inline-flex;align-items:baseline;gap:6px;
  padding:9px 10px;
  font-size:.9rem;font-weight:500;letter-spacing:.01em;
  color:var(--deep);text-decoration:none;
  border-radius:var(--radius);
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.nav-list a::after{
  content:"";position:absolute;left:10px;right:10px;bottom:4px;
  height:2px;background:var(--signal);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .24s var(--ease);
}
.nav-list a:hover{background:rgba(217,209,196,.6);}
.nav-list a:hover::after{transform:scaleX(1);}
.nav-list a[aria-current="page"]{font-weight:700;color:var(--deep);}
.nav-list a[aria-current="page"]::after{transform:scaleX(1);background:var(--copper);}
.nav-num{
  font-family:var(--font-mono);
  font-size:.64rem;letter-spacing:.06em;
  color:var(--copper);
}
.nav-list a[aria-current="page"] .nav-num{color:var(--signal);}
.nav-cta{display:none;}

.scroll-meter{
  position:fixed;top:0;left:0;right:0;
  height:3px;z-index:200;
  pointer-events:none;
  background:rgba(14,42,71,.08);
}
.scroll-meter span{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--copper),var(--signal));
  transform:scaleX(0);transform-origin:0 50%;
  will-change:transform;
}

@media (max-width:1360px){
  .utility-note{display:none;}
}
@media (max-width:1280px) and (min-width:1181px){
  .nav-list a{font-size:.84rem;padding:9px 7px;gap:4px;}
  .nav-list a::after{left:7px;right:7px;}
}
@media (max-width:1180px){
  :root{--strip-h:0px;}
  .header-strip{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-main-inner{min-height:64px;}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;
    max-height:0;overflow:hidden;visibility:hidden;
    border-top:1px solid var(--line);
    border-bottom:2px solid var(--copper);
    box-shadow:0 22px 34px -28px rgba(19,32,44,.9);
    transition:max-height .34s var(--ease),visibility .34s var(--ease);
  }
  .site-header[data-open="true"] .site-nav{
    max-height:min(76vh,640px);
    overflow-y:auto;
    visibility:visible;
  }
  .nav-inner{
    flex-direction:column;align-items:stretch;gap:0;
    padding-block:10px 22px;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0;}
  .nav-list a{
    padding:14px 4px;
    font-size:1rem;
    border-bottom:1px solid var(--line-soft);
    border-radius:0;
  }
  .nav-list a::after{display:none;}
  .nav-list a:hover{background:rgba(217,209,196,.5);}
  .nav-list a[aria-current="page"]{color:var(--deep);}
  .nav-num{font-size:.7rem;width:26px;flex:0 0 auto;}
  .nav-cta{display:inline-flex;align-self:flex-start;margin-top:18px;}
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--deep);
  color:var(--sand);
  margin-top:clamp(48px,8vw,104px);
}
.site-footer::before{
  content:"";display:block;height:6px;
  background-image:repeating-linear-gradient(90deg,var(--copper) 0 26px,rgba(184,134,59,.18) 26px 44px);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,.75fr) minmax(0,.75fr) minmax(0,1.3fr);
  gap:clamp(24px,3.6vw,56px);
  padding-block:clamp(40px,6vw,74px);
}
.footer-brand{max-width:34ch;min-width:0;}
.brand--footer{color:var(--cream);}
.brand--footer .brand-mark{background:var(--cream);color:var(--deep);border-color:var(--copper);box-shadow:inset 0 0 0 3px var(--cream),inset 0 0 0 4px rgba(184,134,59,.6);}
.brand--footer .brand-sub{color:var(--copper);}
.footer-tagline{
  margin-top:16px;
  font-size:.94rem;line-height:1.8;
  color:rgba(244,239,230,.72);
}
.footer-col{min-width:0;}
.footer-contact{min-width:0;}
.footer-col-title{
  font-family:var(--font-mono);
  font-size:.72rem;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;
  line-height:1.4;
  color:var(--copper);
  margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{
  font-size:.95rem;
  color:rgba(244,239,230,.82);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.footer-links a:hover{
  color:var(--cream);
  text-decoration:underline;
  text-decoration-color:var(--signal);
  text-underline-offset:4px;
}
.contact-list{
  font-style:normal;
  display:flex;flex-direction:column;gap:10px;
}
.contact-row{
  display:flex;gap:10px;align-items:baseline;
  font-size:.93rem;line-height:1.65;
  color:rgba(244,239,230,.85);
}
.contact-key{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:.68rem;letter-spacing:.1em;
  color:var(--copper);
}
.contact-val{word-break:break-word;}
.contact-note{
  margin-top:14px;
  font-size:.78rem;line-height:1.7;
  color:rgba(244,239,230,.55);
}
.footer-legal{
  border-top:1px solid rgba(244,239,230,.16);
  padding-block:22px;
  display:flex;flex-wrap:wrap;align-items:center;
  gap:10px 24px;
  font-size:.76rem;
  color:rgba(244,239,230,.6);
}
.footer-legal .mono{font-size:.74rem;letter-spacing:.04em;}
.legal-links{
  display:flex;flex-wrap:wrap;gap:16px;
  margin-left:auto;
}
.legal-links a{
  font-size:.76rem;
  color:rgba(244,239,230,.72);
  text-decoration:none;
}
.legal-links a:hover{color:var(--cream);text-decoration:underline;text-underline-offset:3px;}

@media (max-width:980px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-brand{grid-column:1 / -1;max-width:none;}
  .legal-links{margin-left:0;}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr;}
}

/* ---------- 通用版式与组件 ---------- */
.section{padding-block:clamp(44px,6.4vw,92px);}
.band--sand{background:var(--sand);}
.band--mist{background:var(--mist);}
.band--deep{background:var(--deep);color:var(--cream);}
.band--deep h1,.band--deep h2,.band--deep h3,.band--deep h4{color:var(--cream);}
.band--deep a{color:var(--cream);}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);
  font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--copper);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--signal);}
.sec-num{
  display:block;
  font-family:var(--font-mono);
  font-size:.78rem;letter-spacing:.2em;
  color:var(--copper);
  margin-bottom:10px;
}
.rule{
  height:1px;background:var(--line);
  border:0;margin-block:clamp(26px,4vw,44px);
}
.rule--ticks{
  height:9px;background:transparent;
  background-image:repeating-linear-gradient(90deg,var(--copper) 0 1px,transparent 1px 11px);
  opacity:.55;
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.74em 1.3em;
  font-family:var(--font-body);
  font-size:.94rem;font-weight:500;letter-spacing:.02em;line-height:1.2;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:var(--radius);
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:hover{transform:translateY(-1px);}
.btn--primary{background:var(--deep);color:var(--cream);border-color:var(--deep);}
.btn--primary:hover{background:var(--deep-lift);border-color:var(--deep-lift);color:var(--cream);}
.btn--signal{background:var(--signal);color:#fff;border-color:var(--signal);}
.btn--signal:hover{background:#d9541d;border-color:#d9541d;color:#fff;}
.btn--ghost{background:transparent;color:var(--deep);border-color:rgba(14,42,71,.4);}
.btn--ghost:hover{background:rgba(14,42,71,.06);border-color:var(--deep);color:var(--deep);}
.band--deep .btn--ghost{color:var(--cream);border-color:rgba(244,239,230,.45);}
.band--deep .btn--ghost:hover{background:rgba(244,239,230,.1);border-color:var(--cream);}

.breadcrumb{
  font-size:.8rem;letter-spacing:.04em;
  color:var(--stone);
}
.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:var(--copper);}
.breadcrumb a{color:var(--stone);text-decoration:none;}
.breadcrumb a:hover{color:var(--deep);text-decoration:underline;text-underline-offset:3px;}
.breadcrumb [aria-current="page"]{color:var(--deep);font-weight:500;}

.prose{max-width:72ch;}
.prose > * + *{margin-top:1.05em;}
.prose p{margin:0 0 1.05em;line-height:1.8;}
.prose ul,.prose ol{list-style:revert;padding-left:1.35em;margin:0 0 1.05em;}
.prose ul{list-style:disc;}
.prose li{margin-bottom:.42em;}
.prose li::marker{color:var(--copper);}
.prose h2,.prose h3{margin-top:1.6em;}
.prose blockquote{
  padding:16px 20px;
  background:var(--mist);
  border-left:3px solid var(--copper);
  color:var(--deep);
}
.prose code{
  font-family:var(--font-mono);
  font-size:.88em;
  padding:1px 5px;
  background:rgba(217,209,196,.65);
  border-radius:var(--radius);
}
.prose hr{height:1px;background:var(--line);border:0;margin-block:2em;}
.prose a{color:var(--clay);text-decoration:underline;}
.prose a:hover{color:var(--signal);}

.grid{display:grid;gap:clamp(16px,2.4vw,32px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--rail{grid-template-columns:minmax(0,.85fr) minmax(0,1.6fr);}
@media (max-width:880px){
  .grid--2,.grid--3{grid-template-columns:1fr;}
}
@media (max-width:820px){
  .grid--rail{grid-template-columns:1fr;}
}

.media{
  position:relative;display:block;overflow:hidden;
  width:100%;
  background-color:var(--sand);
  background-image:repeating-linear-gradient(135deg,rgba(19,32,44,.06) 0 1px,transparent 1px 10px);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.media > img,.media > picture > img{
  width:100%;height:100%;object-fit:cover;
}
.media--wide{aspect-ratio:16 / 9;}
.media--tall{aspect-ratio:4 / 5;}
.media--square{aspect-ratio:1 / 1;}
.media--banner{aspect-ratio:21 / 9;}
.media-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:.72rem;letter-spacing:.06em;
  color:var(--stone);
}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;
  font-family:var(--font-mono);
  font-size:.7rem;letter-spacing:.08em;
  color:var(--stone);
  background:var(--cream);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.tag--signal{background:var(--signal);border-color:var(--signal);color:#fff;}
.tag--moss{background:var(--moss);border-color:var(--moss);color:#fff;}
.tag--clay{background:var(--clay);border-color:var(--clay);color:#fff;}
.tag--copper{background:var(--copper);border-color:var(--copper);color:var(--cream);}

.fold{
  border:1px solid var(--line);
  background:var(--cream);
  border-radius:var(--radius);
}
.fold + .fold{margin-top:10px;}
.fold-head{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;
  padding:15px 18px;
  text-align:left;
  font-family:var(--font-display);
  font-weight:700;font-size:1.02rem;
  color:var(--deep);
  background:var(--mist);
  border-bottom:1px solid transparent;
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}
.fold-head:hover{background:#bccdd8;}
.fold-head::after{
  content:"+";
  font-family:var(--font-mono);
  font-size:1.1rem;line-height:1;
  color:var(--copper);
}
.fold[data-open="true"] .fold-head{border-bottom-color:var(--line);}
.fold[data-open="true"] .fold-head::after{content:"–";}
.fold-body{
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows .3s var(--ease);
}
.fold-body > *{overflow:hidden;}
.fold[data-open="true"] .fold-body{grid-template-rows:1fr;}
.fold-inner{padding:16px 18px 20px;font-size:.96rem;}

.js [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.js [data-reveal].is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
  html{scroll-behavior:auto;}
  .js [data-reveal]{opacity:1;transform:none;}
  .btn:hover{transform:none;}
}