*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol,li,dl,dd,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{font-weight:700;line-height:1.2}
:focus-visible{outline:2px solid var(--yellow);outline-offset:3px;box-shadow:0 0 0 5px rgba(11,31,51,.28)}

:root{
  --deep:#0B1F33;
  --harbor:#123B5D;
  --cream:#F4EBDD;
  --sand:#E4D6C3;
  --ink:#241A17;
  --orange:#F05A28;
  --yellow:#F2B705;
  --teal:#8FA9AE;
  --brick:#B73B2E;
  --mist:#FAF7F0;
  --line-dark:rgba(36,26,23,.16);
  --line-light:rgba(244,235,221,.18);
  --font-display:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","HarmonyOS Sans SC","PingFang SC","Source Han Sans SC",system-ui,-apple-system,"Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --w-max:1240px;
  --gutter:clamp(16px,4vw,44px);
  --space:24px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

body{
  min-height:100vh;
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--yellow);color:var(--deep)}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
.mono{font-family:var(--font-mono);font-size:.78em;letter-spacing:.06em}

/* ---------- 布局容器 ---------- */
.container{width:100%;max-width:var(--w-max);margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:880px}
.section{padding-block:clamp(40px,6vw,84px)}
.section--tight{padding-block:clamp(24px,3.5vw,48px)}
.page-head{padding-block:clamp(28px,4vw,52px) 0}

.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--brick)}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--orange)}
.display-title{font-family:var(--font-display);font-weight:800;font-size:clamp(2.4rem,6.2vw,5rem);line-height:1.02;letter-spacing:-.035em;color:var(--deep);text-wrap:balance}
.lede{font-size:clamp(1rem,1.35vw,1.12rem);line-height:1.85;color:rgba(36,26,23,.78);max-width:62ch}
.section-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:clamp(18px,2.6vw,30px)}
.section-index{font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.1em;padding:3px 9px;background:var(--yellow);color:var(--deep)}
.section-title{font-family:var(--font-display);font-weight:700;font-size:clamp(1.5rem,3vw,2.4rem);line-height:1.15;letter-spacing:-.02em;color:var(--deep)}
.diag-rule{height:1px;border:0;margin-block:clamp(20px,3vw,36px);background:repeating-linear-gradient(90deg,var(--teal) 0 8px,transparent 8px 16px);opacity:.7}

/* ---------- 按钮 ---------- */
.btn{
  --cut:10px;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;font-size:.88rem;font-weight:700;letter-spacing:.04em;line-height:1.2;
  text-decoration:none;white-space:nowrap;border:1px solid transparent;border-radius:0;
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--yellow),inset 0 0 0 4px rgba(11,31,51,.55)}
.btn--signal{background:var(--orange);border-color:var(--orange);color:var(--deep)}
.btn--signal:hover{background:#ff6f42;border-color:#ff6f42;box-shadow:inset 0 0 0 2px rgba(11,31,51,.18)}
.btn--ghost{background:transparent;border-color:rgba(244,235,221,.34);color:var(--cream)}
.btn--ghost:hover{border-color:var(--yellow);color:var(--yellow);box-shadow:inset 0 0 0 1px rgba(242,183,5,.45)}
.btn--ink{background:var(--deep);border-color:var(--deep);color:var(--cream)}
.btn--ink:hover{background:var(--harbor);border-color:var(--harbor)}
.btn--line{background:transparent;border-color:rgba(18,59,93,.4);color:var(--harbor)}
.btn--line:hover{border-color:var(--orange);color:var(--brick);box-shadow:inset 0 0 0 1px rgba(240,90,40,.35)}
.btn-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px}

/* ---------- 标签 / 面包屑 / 媒体框 ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:var(--harbor);background:var(--cream);border:1px solid rgba(18,59,93,.28);
  text-decoration:none;
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.tag:hover{border-color:var(--orange);color:var(--brick)}
.tag[aria-pressed="true"]{background:var(--deep);border-color:var(--deep);color:var(--cream)}
.tag--signal{background:var(--orange);border-color:var(--orange);color:var(--deep);font-weight:700}
.tag--yellow{background:var(--yellow);border-color:var(--yellow);color:var(--deep);font-weight:700}
.tag--dark{background:var(--deep);border-color:var(--deep);color:var(--cream)}

.breadcrumb{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--harbor)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"›";color:var(--teal)}
.breadcrumb a{color:var(--harbor);text-decoration:none;border-bottom:1px solid transparent;transition:color .16s var(--ease),border-color .16s var(--ease)}
.breadcrumb a:hover{color:var(--orange);border-bottom-color:var(--orange)}
.breadcrumb [aria-current="page"]{color:var(--brick)}

.media-frame{
  position:relative;display:block;overflow:hidden;aspect-ratio:16/10;
  background:var(--sand);border:1px solid var(--line-dark);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(11,31,51,.09) 1px,transparent 1px),linear-gradient(90deg,rgba(11,31,51,.09) 1px,transparent 1px);
  background-size:34px 34px;
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-caption{display:block;margin-top:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--brick)}

/* ---------- Bento ---------- */
.bento{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,1.8vw,24px)}
.bento-card{
  grid-column:span 4;position:relative;
  padding:clamp(18px,2.2vw,28px);
  background:var(--mist);border:1px solid var(--line-dark);color:var(--ink);
  clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,18px 100%,0 calc(100% - 18px));
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease);
}
.bento-card:hover{transform:translateY(-2px);box-shadow:inset 0 0 0 2px rgba(240,90,40,.42)}
.bento-card--wide{grid-column:span 8}
.bento-card--half{grid-column:span 6}
.bento-card--full{grid-column:1/-1}
.bento-card--dark{background:var(--deep);border-color:rgba(244,235,221,.16);color:var(--cream)}
.bento-card--dark:hover{box-shadow:inset 0 0 0 2px rgba(242,183,5,.5)}
.bento-card--signal{background:var(--orange);border-color:transparent;color:var(--deep)}
.bento-card-title{font-family:var(--font-display);font-weight:700;font-size:clamp(1.05rem,1.6vw,1.32rem);letter-spacing:-.01em;margin-bottom:8px}
.bento-card-note{font-size:.86rem;line-height:1.7;color:rgba(36,26,23,.7)}
.bento-card--dark .bento-card-note{color:rgba(244,235,221,.76)}
.bento-card--signal .bento-card-note{color:rgba(11,31,51,.78)}

/* ---------- 页头 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:300;
  padding:10px 18px;background:var(--yellow);color:var(--deep);
  font-weight:700;text-decoration:none;
  transform:translateY(-180%);transition:transform .16s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:sticky;top:0;z-index:100;
  background-color:var(--deep);
  background-image:repeating-linear-gradient(90deg,rgba(143,169,174,.1) 0 1px,transparent 1px 72px),repeating-linear-gradient(0deg,rgba(143,169,174,.06) 0 1px,transparent 1px 72px);
  color:var(--cream);
  border-bottom:1px solid var(--line-light);
}
.site-header::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:linear-gradient(90deg,var(--orange) 0 18%,var(--yellow) 18% 30%,rgba(143,169,174,.35) 30% 100%);
}
.scroll-meter{
  position:absolute;left:0;bottom:-1px;width:100%;height:3px;
  transform:scaleX(0);transform-origin:0 50%;opacity:0;
  background:linear-gradient(90deg,var(--orange),var(--yellow));
  transition:opacity .2s var(--ease);
}
.header-shell{
  position:relative;display:flex;align-items:center;gap:clamp(14px,2.4vw,32px);
  width:100%;max-width:var(--w-max);margin-inline:auto;
  padding:12px var(--gutter);min-height:78px;
}
.header-mast{display:flex;align-items:center;min-width:0}
.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none;color:inherit}
.brand-glyph{
  flex:0 0 auto;display:grid;place-items:center;width:36px;height:36px;
  background:var(--orange);color:var(--deep);
  font-family:var(--font-mono);font-size:12.5px;font-weight:700;letter-spacing:.02em;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:background-color .18s var(--ease);
}
.brand:hover .brand-glyph{background:var(--yellow)}
.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand-name{font-family:var(--font-display);font-weight:800;font-size:1.08rem;letter-spacing:.04em;color:var(--mist)}
.brand-descriptor{margin-top:3px;font-size:.7rem;letter-spacing:.14em;color:var(--teal)}
.brand-coord{margin-top:3px;font-family:var(--font-mono);font-size:9.5px;letter-spacing:.18em;color:rgba(242,183,5,.85)}

.site-nav{margin-left:auto}
.site-nav-list{display:flex;align-items:center;gap:clamp(2px,1vw,14px)}
.nav-link{
  position:relative;display:flex;flex-direction:column;gap:2px;
  padding:8px 6px 11px;text-decoration:none;color:var(--cream);
  transition:color .18s var(--ease);
}
.nav-index{font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;color:var(--teal);transition:color .18s var(--ease),background-color .18s var(--ease)}
.nav-label{font-size:.92rem;font-weight:600;letter-spacing:.02em;white-space:nowrap}
.nav-link::after{
  content:"";position:absolute;left:6px;right:6px;bottom:3px;height:2px;
  background:var(--orange);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .2s var(--ease),background-color .2s var(--ease);
}
.nav-link:hover{color:var(--yellow)}
.nav-link:hover .nav-index{color:var(--yellow)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--yellow)}
.nav-link[aria-current="page"] .nav-index{padding:1px 4px;background:var(--yellow);color:var(--deep)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--yellow)}
.nav-ctas{display:none}

.header-actions{display:flex;align-items:center;gap:10px}

.nav-toggle{
  display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  width:46px;height:42px;padding:0;
  border:1px solid rgba(244,235,221,.32);color:var(--cream);
  clip-path:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,0 100%);
  transition:border-color .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--yellow);color:var(--yellow)}
.nav-toggle-bar{display:block;width:18px;height:2px;background:currentColor;transition:transform .2s var(--ease)}
.nav-toggle[aria-expanded="true"]{background:rgba(242,183,5,.14);border-color:var(--yellow);color:var(--yellow)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){transform:translateY(-3.5px) rotate(-45deg)}

/* ---------- 右侧坐标锚 ---------- */
.coord-rail{
  display:none;position:fixed;right:14px;top:50%;transform:translateY(-50%);z-index:40;
  flex-direction:column;align-items:center;gap:12px;
  padding:16px 9px;
  background:rgba(11,31,51,.94);
  border:1px solid rgba(242,183,5,.32);
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
}
@media (min-width:1360px){.coord-rail{display:flex}}
.coord-rail-label{writing-mode:vertical-rl;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.28em;color:var(--teal)}
.coord-link{
  writing-mode:vertical-rl;padding:9px 4px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.3em;
  color:var(--cream);text-decoration:none;
  border-block:1px solid rgba(244,235,221,.18);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.coord-link:hover{color:var(--yellow);border-color:var(--yellow)}
.coord-rail-code{writing-mode:vertical-rl;font-family:var(--font-mono);font-size:9.5px;letter-spacing:.16em;color:var(--yellow)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(56px,9vw,110px);
  background-color:var(--deep);
  background-image:repeating-linear-gradient(90deg,rgba(143,169,174,.08) 0 1px,transparent 1px 80px);
  color:var(--cream);
}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:4px;
  background:linear-gradient(90deg,var(--orange) 0 26%,var(--yellow) 26% 42%,rgba(143,169,174,.5) 42% 100%);
}
.site-footer::after{
  content:"";position:absolute;right:-140px;top:48px;width:420px;height:420px;border-radius:50%;
  border:1px solid rgba(143,169,174,.16);
  box-shadow:0 0 0 60px rgba(143,169,174,.05),0 0 0 140px rgba(143,169,174,.03);
  pointer-events:none;z-index:0;
}
.footer-shell{
  position:relative;z-index:1;
  width:100%;max-width:var(--w-max);margin-inline:auto;
  padding:clamp(36px,5vw,64px) var(--gutter) clamp(20px,3vw,28px);
}
.footer-top{
  display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,.85fr) minmax(0,.95fr) minmax(0,1.3fr);
  gap:clamp(24px,3vw,44px);
  padding-bottom:clamp(26px,4vw,44px);
  border-bottom:1px solid var(--line-light);
}
.footer-col--brand{min-width:0}
.footer-brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:inherit}
.footer-brand:hover .brand-glyph{background:var(--yellow)}
.footer-brand-name{font-family:var(--font-display);font-weight:800;font-size:1.2rem;letter-spacing:.03em;color:var(--mist)}
.footer-summary{margin-top:14px;max-width:34ch;font-size:.92rem;line-height:1.85;color:rgba(244,235,221,.78)}
.footer-coord{margin-top:14px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;color:var(--yellow)}
.footer-col-title{
  display:flex;align-items:center;gap:8px;
  margin-bottom:12px;padding-bottom:10px;
  font-family:var(--font-mono);font-size:11.5px;font-weight:700;letter-spacing:.2em;
  color:var(--yellow);border-bottom:1px dashed rgba(244,235,221,.2);
}
.footer-col-title::before{content:"";width:6px;height:6px;background:var(--orange);flex:0 0 auto}
.footer-list{display:grid;gap:1px}
.footer-list--contact{gap:12px}
.footer-link{
  position:relative;display:inline-block;padding:6px 0;
  font-size:.92rem;color:rgba(244,235,221,.82);text-decoration:none;
  transition:color .16s var(--ease);
}
.footer-link::after{
  content:"";position:absolute;left:0;bottom:4px;width:100%;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:0 50%;
  transition:transform .18s var(--ease);
}
.footer-link:hover,.footer-link:focus-visible{color:var(--yellow)}
.footer-link:hover::after,.footer-link:focus-visible::after{transform:scaleX(1)}
.footer-link[aria-current="page"]{color:var(--yellow)}
.footer-contact{display:grid;grid-template-columns:44px minmax(0,1fr);gap:8px;align-items:start}
.footer-contact-label{padding-top:3px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;color:var(--teal)}
.footer-contact-value{font-size:.88rem;line-height:1.7;color:rgba(244,235,221,.9);word-break:break-word}
.footer-ledger{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px clamp(14px,3vw,30px);
  padding-top:clamp(18px,2.6vw,26px);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;
  color:rgba(244,235,221,.62);
}
.footer-ledger-item{min-width:0}
.footer-legal{color:var(--yellow)}
.footer-ledger-note{color:rgba(244,235,221,.55)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px) and (min-width:901px){
  .header-actions .btn--ghost{display:none}
  .nav-label{font-size:.84rem}
  .nav-link{padding-inline:4px}
}
@media (max-width:1024px){
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .header-shell{
    display:grid;grid-template-columns:minmax(0,1fr) auto auto;
    align-items:center;gap:10px 12px;
    padding-block:12px;min-height:0;
  }
  .header-mast{grid-column:1;grid-row:1}
  .header-actions{grid-column:2;grid-row:1;margin-left:0}
  .header-actions .btn--ghost{display:none}
  .nav-toggle{display:inline-flex;grid-column:3;grid-row:1;justify-self:end}
  .site-nav{
    display:none;grid-column:1/-1;grid-row:2;margin-left:0;
    padding:8px;background:var(--harbor);border:1px solid rgba(244,235,221,.16);
    clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,0 100%);
  }
  .site-nav[data-open]{display:block}
  .site-nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{border-bottom:1px solid rgba(244,235,221,.1)}
  .nav-item:last-child{border-bottom:0}
  .nav-link{flex-direction:row;align-items:baseline;gap:12px;padding:12px 10px}
  .nav-link::after{display:none}
  .nav-index{min-width:22px;font-size:11px}
  .nav-label{font-size:1rem}
  .nav-ctas{display:flex;flex-wrap:wrap;gap:10px;padding:12px 10px 6px}
  .bento-card,.bento-card--wide,.bento-card--half{grid-column:span 6}
}
@media (max-width:700px){
  .bento-card,.bento-card--wide,.bento-card--half{grid-column:1/-1}
}
@media (max-width:600px){
  .footer-top{grid-template-columns:1fr}
  .footer-summary{max-width:none}
}
@media (max-width:560px){
  .header-actions{display:none}
  .brand-coord{display:none}
  .brand-descriptor{font-size:.66rem;letter-spacing:.08em}
  .brand-glyph{width:32px;height:32px;font-size:11.5px}
  .footer-ledger{font-size:11px}
}

@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,.bento-card:hover{transform:none}
}