/* ================= 01 设计令牌 ================= */
:root{
  --ink:#06060A;
  --ink-2:#0F1018;
  --card:#191B26;
  --gold:#D4A44C;
  --gold-hi:#F4D794;
  --gold-deep:#8A6526;
  --violet:#5A3FB0;
  --indigo:#3B4BD8;
  --magenta:#E0398F;
  --teal:#26C6A6;
  --paper:#F2ECE1;
  --mist:#A7A2B4;
  --rail:78px;
  --frame-top:96px;
  --shell:1200px;
  --line-gold:rgba(212,164,76,.22);
  --rule-gold:linear-gradient(90deg,rgba(212,164,76,0),#D4A44C 16%,#F4D794 50%,#D4A44C 84%,rgba(212,164,76,0));
  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-body:"Inter","HarmonyOS Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ================= 02 重置与底座 ================= */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg,video{display:block;max-width:100%;height:auto}
:focus-visible{outline:2px solid var(--gold-hi);outline-offset:3px;border-radius:2px}

html{scroll-behavior:smooth}
body{
  min-height:100vh;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.005em;
  padding-left:var(--rail);
  padding-top:var(--frame-top);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* ================= 03 通用排版 ================= */
.display{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(2.6rem,7vw,7.5rem);
  line-height:1.02;
  letter-spacing:-.01em;
  color:var(--paper);
  -webkit-text-stroke:.6px rgba(212,164,76,.45);
  text-shadow:0 0 30px rgba(212,164,76,.16);
}
.sub-display{
  font-family:var(--font-display);
  font-weight:400;
  font-size:clamp(1.6rem,3vw,2.6rem);
  line-height:1.24;
  letter-spacing:0;
  color:var(--paper);
}
.lede{
  font-size:clamp(1rem,1.3vw,1.1rem);
  line-height:1.85;
  color:rgba(242,236,225,.86);
  max-width:68ch;
}
.mono-label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mist);
}
.quote{
  font-family:var(--font-display);
  font-size:clamp(1.05rem,1.6vw,1.35rem);
  line-height:1.75;
  color:var(--paper);
  border-left:1px solid var(--gold);
  border-right:1px solid var(--gold);
  padding:4px 20px;
  max-width:60ch;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold);
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--gold-hi),transparent)}

/* ================= 04 布局容器 ================= */
.wrap{width:100%;max-width:var(--shell);margin:0 auto;padding:0 28px}
.wrap--narrow{max-width:820px}
.section{padding:96px 0;position:relative}
.grid{display:grid;gap:22px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--index{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}

/* ================= 05 组件：按钮 / 标签 / 卡片 ================= */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 22px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.18em;
  color:var(--paper);
  background:transparent;
  border:1px solid rgba(212,164,76,.45);
  transition:background-color .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease),box-shadow .25s var(--ease);
}
.btn--ghost:hover{background:rgba(212,164,76,.12);border-color:var(--gold-hi);color:var(--gold-hi)}
.btn--gold{
  background:linear-gradient(120deg,var(--gold-hi),var(--gold) 46%,var(--gold-deep));
  border-color:transparent;
  color:#140F06;
  font-weight:600;
}
.btn--gold:hover{box-shadow:0 0 0 1px rgba(244,215,148,.6),0 16px 36px rgba(212,164,76,.24)}
.btn:active{transform:translateY(1px)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  color:var(--gold-hi);
  border:1px solid rgba(212,164,76,.35);
}
.tag--alert{color:var(--magenta);border-color:rgba(224,57,143,.5)}
.tag--ok{color:var(--teal);border-color:rgba(38,198,166,.5)}
.sig-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--teal);box-shadow:0 0 12px currentColor}

.card{
  position:relative;
  background:var(--card);
  border:1px solid rgba(212,164,76,.18);
  padding:22px;
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(212,164,76,.5);box-shadow:0 26px 54px rgba(0,0,0,.6)}

.board{
  position:relative;
  background:linear-gradient(160deg,#191B26 0%,#101119 100%);
  border:1px solid rgba(212,164,76,.22);
  padding:26px 24px;
  box-shadow:0 24px 60px rgba(0,0,0,.55);
}
.board::after{
  content:"";
  position:absolute;
  top:-1px;right:-1px;
  width:16px;height:16px;
  border-top:1px solid var(--gold);
  border-right:1px solid var(--gold);
}
.board--lift{transform:translateY(-14px)}
.board__title{font-family:var(--font-display);font-weight:400;font-size:1.25rem;line-height:1.4;color:var(--paper);margin-bottom:10px}
.board__meta{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;color:var(--mist);margin-bottom:14px}

/* ================= 06 面包屑 ================= */
.crumbs{padding:28px 0 0}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--mist)}
.crumbs__sep{color:rgba(212,164,76,.55)}
.crumbs__link:hover{color:var(--gold-hi)}
.crumbs__item[aria-current="page"]{color:var(--paper)}

/* ================= 07 图片容器基础规则 ================= */
.media{
  position:relative;
  width:100%;
  overflow:hidden;
  border:1px solid rgba(212,164,76,.2);
  background:linear-gradient(140deg,#141623 0%,#0A0A11 100%);
}
.media::before{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(120% 90% at 28% 18%,rgba(90,63,176,.35),transparent 62%);
  pointer-events:none;
  z-index:1;
}
.media__frame{position:relative;aspect-ratio:16/9;overflow:hidden}
.media--wide .media__frame{aspect-ratio:21/9}
.media--square .media__frame{aspect-ratio:1/1}
.media--portrait .media__frame{aspect-ratio:3/4}
.media__img{width:100%;height:100%;object-fit:cover;position:relative;z-index:0}
.media__caption{margin-top:10px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;color:var(--mist)}

/* ================= 08 头部框架 ================= */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  transform:translateY(-160%);
  z-index:120;
  padding:10px 18px;
  background:var(--gold-hi);
  color:#0B0A06;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.site-frame{position:fixed;inset:0;z-index:90;pointer-events:none}
.site-frame>*{pointer-events:auto}

.frame-rule{
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:var(--rule-gold);
  opacity:.92;
  z-index:6;
  pointer-events:none;
}

.frame-brand{
  position:absolute;
  top:24px;left:calc(var(--rail) + 26px);
  display:flex;
  align-items:baseline;
  gap:14px;
  z-index:10;
}
.frame-brand__mark{
  font-family:var(--font-display);
  font-weight:400;
  font-size:19px;
  letter-spacing:.16em;
  color:var(--gold-hi);
  text-shadow:0 0 18px rgba(212,164,76,.35);
  transition:color .25s var(--ease),text-shadow .25s var(--ease);
}
.frame-brand__suffix{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--mist);
}
.frame-brand:hover .frame-brand__mark{color:var(--paper);text-shadow:0 0 26px rgba(244,215,148,.55)}

.frame-utility{
  position:absolute;
  top:28px;right:28px;
  z-index:10;
  padding-bottom:4px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--mist);
  border-bottom:1px solid rgba(212,164,76,.35);
  transition:color .25s var(--ease),border-color .25s var(--ease);
}
.frame-utility:hover{color:var(--gold-hi);border-color:var(--gold-hi)}

.nav-toggle{
  position:absolute;
  top:14px;right:14px;
  z-index:11;
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  background:rgba(9,9,15,.9);
  border:1px solid rgba(212,164,76,.35);
}
.nav-toggle__bars{display:block;width:18px}
.nav-toggle__bars i{display:block;height:1px;background:var(--gold-hi);margin:4px 0;transition:transform .25s var(--ease),opacity .2s var(--ease)}
.nav-toggle__text{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;color:var(--paper)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.site-nav{
  position:absolute;
  top:0;left:0;bottom:0;
  width:var(--rail);
  z-index:5;
  display:flex;
  flex-direction:column;
  justify-content:center;
  background:linear-gradient(180deg,rgba(15,16,24,.94),rgba(6,6,10,.94));
  border-right:1px solid var(--line-gold);
}
.site-nav__title{display:none}
.site-nav__list{display:flex;flex-direction:column;align-items:center;gap:4px}
.site-nav__item{position:relative}
.site-nav__link{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  width:46px;
  height:46px;
  border:1px solid transparent;
  transition:border-color .25s var(--ease),background-color .25s var(--ease);
}
.site-nav__link::before{
  content:"";
  position:absolute;
  left:-1px;top:50%;
  width:2px;height:0;
  transform:translateY(-50%);
  background:linear-gradient(180deg,var(--gold-hi),var(--gold-deep));
  transition:height .28s var(--ease);
}
.site-nav__link:hover::before,
.site-nav__link[aria-current="page"]::before{height:26px}
.site-nav__link:hover{background:rgba(212,164,76,.06)}
.site-nav__link[aria-current="page"]{border-color:rgba(212,164,76,.45);background:rgba(212,164,76,.07)}
.site-nav__num{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--mist);
  transition:color .25s var(--ease);
}
.site-nav__link:hover .site-nav__num,
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--gold-hi)}
.site-nav__label{
  position:absolute;
  left:calc(100% + 14px);
  top:50%;
  transform:translate(-10px,-50%);
  opacity:0;
  pointer-events:none;
  white-space:nowrap;
  padding:6px 14px;
  font-size:12.5px;
  letter-spacing:.12em;
  color:var(--paper);
  background:rgba(25,27,38,.96);
  border:1px solid rgba(212,164,76,.34);
  border-left:2px solid var(--gold);
  box-shadow:0 18px 40px rgba(0,0,0,.6);
  transition:opacity .22s var(--ease),transform .22s var(--ease);
}
.site-nav__link:hover .site-nav__label,
.site-nav__link:focus-visible .site-nav__label{opacity:1;transform:translate(0,-50%)}
.site-nav__extra{display:none}

.frame-corner{
  position:absolute;
  right:22px;bottom:22px;
  z-index:7;
  display:flex;
  align-items:center;
  gap:12px;
}
.frame-corner__label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--mist);
}
.frame-corner__top{
  position:relative;
  display:grid;
  place-items:center;
  width:46px;height:46px;
  border-radius:50%;
  background:conic-gradient(var(--gold-hi) calc(var(--p,0) * 1turn),rgba(212,164,76,.16) 0);
  box-shadow:0 12px 34px rgba(0,0,0,.55);
  transition:box-shadow .25s var(--ease);
}
.frame-corner__top::after{
  content:"";
  position:absolute;
  inset:2px;
  border-radius:50%;
  background:rgba(8,8,13,.94);
  border:1px solid rgba(212,164,76,.25);
}
.frame-corner__top:hover{box-shadow:0 0 0 1px rgba(244,215,148,.5),0 14px 38px rgba(212,164,76,.28)}
.frame-corner__arrow{position:relative;z-index:1;font-size:14px;line-height:1;color:var(--gold-hi)}

/* ================= 09 页脚 ================= */
.site-footer{
  position:relative;
  background:linear-gradient(180deg,#06060A 0%,#0B0C14 42%,#06060A 100%);
  overflow:hidden;
}
.site-footer__rule{display:block;height:1px;background:var(--rule-gold)}
.site-footer__glow{
  position:absolute;
  left:52%;bottom:-280px;
  width:900px;height:640px;
  transform:translateX(-50%);
  background:radial-gradient(closest-side,rgba(90,63,176,.42),rgba(59,75,216,.16) 56%,transparent 78%);
  pointer-events:none;
}
.footer__inner{
  position:relative;
  max-width:var(--shell);
  margin:0 auto;
  padding:78px 28px 44px;
  display:grid;
  grid-template-columns:minmax(0,1.1fr) minmax(0,2fr);
  gap:56px 60px;
}
.footer__mark{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(1.7rem,3.4vw,2.5rem);
  line-height:1.2;
  letter-spacing:.06em;
  background:linear-gradient(120deg,var(--gold-hi),var(--gold) 46%,var(--gold-deep));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.footer__sub{
  margin-top:12px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--mist);
}
.footer__blurb{
  margin-top:18px;
  max-width:32ch;
  font-size:14px;
  line-height:1.85;
  color:rgba(167,162,180,.92);
}
.footer__nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}
.footer__col-title{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:18px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.2em;
  color:var(--gold);
}
.footer__col-title::before{content:"";display:block;width:14px;height:1px;background:var(--gold)}
.footer__list li+li{margin-top:11px}
.footer__list a{
  display:inline-block;
  font-size:14.5px;
  color:rgba(242,236,225,.82);
  transition:color .22s var(--ease),transform .22s var(--ease);
}
.footer__list a:hover{color:var(--gold-hi);transform:translateX(4px)}

.footer__contact{
  grid-column:1/-1;
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr)) minmax(230px,.95fr);
  gap:26px 30px;
  padding-top:30px;
  border-top:1px solid rgba(212,164,76,.18);
  align-items:start;
}
.contact__key{
  margin-bottom:8px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.2em;
  color:var(--mist);
}
.contact__value{font-size:14.5px;line-height:1.7;color:var(--paper);word-break:break-all}
.contact__value--copy{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:6px;
  padding-bottom:6px;
  text-align:left;
  border-bottom:1px dashed rgba(212,164,76,.45);
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.contact__value--copy:hover{color:var(--gold-hi);border-color:var(--gold-hi)}
.contact__hint{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:var(--gold)}
.contact__aside{display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.contact__note{font-size:13px;line-height:1.8;color:var(--mist)}

.footer__legal{position:relative;border-top:1px solid rgba(212,164,76,.16);background:rgba(3,3,6,.72)}
.footer__legal-inner{
  max-width:var(--shell);
  margin:0 auto;
  padding:20px 28px 26px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 26px;
}
.footer__disclaimer{flex:1 1 100%;max-width:80ch;font-size:12px;line-height:1.7;color:rgba(167,162,180,.82)}
.footer__icp,.footer__copy{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--mist)}
.footer__legal-links{display:flex;flex-wrap:wrap;gap:18px}
.footer__legal-links a{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--mist);transition:color .22s var(--ease)}
.footer__legal-links a:hover{color:var(--gold-hi)}

/* ================= 10 交互状态与显现 ================= */
[data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .26s var(--ease),transform .26s var(--ease);
}
[data-reveal].is-in{opacity:1;transform:none}

[data-toc-link]{
  display:block;
  padding:8px 0;
  border-left:1px solid transparent;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--mist);
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
[data-toc-link].is-active{color:var(--gold-hi);border-color:var(--gold)}

[data-filter-item][hidden]{display:none}
[data-filter-empty][hidden]{display:none}

/* ================= 11 响应式 ================= */
@media (max-width:1080px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__inner{grid-template-columns:1fr;gap:44px}
  .footer__contact{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:860px){
  :root{--rail:0px;--frame-top:66px}
  body{padding-left:0;padding-top:var(--frame-top)}

  .frame-brand{top:16px;left:20px;gap:10px}
  .frame-brand__mark{font-size:15px;letter-spacing:.12em}
  .frame-brand__suffix{font-size:9.5px;letter-spacing:.16em}
  .frame-utility{display:none}
  .nav-toggle{display:inline-flex}

  .site-nav{
    top:0;left:0;right:0;bottom:auto;
    width:auto;
    justify-content:flex-start;
    padding:72px 22px 26px;
    max-height:100vh;
    overflow-y:auto;
    background:linear-gradient(180deg,rgba(10,10,17,.985),rgba(6,6,10,.97));
    border-right:0;
    border-bottom:1px solid rgba(212,164,76,.3);
    visibility:hidden;
    transform:translateY(-101%);
    transition:transform .34s var(--ease),visibility 0s linear .34s;
    z-index:9;
  }
  .site-nav[data-open]{visibility:visible;transform:translateY(0);transition:transform .34s var(--ease),visibility 0s}

  .site-nav__title{display:block;margin-bottom:14px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.22em;color:var(--gold)}
  .site-nav__list{align-items:stretch;gap:0}
  .site-nav__item{border-bottom:1px solid rgba(212,164,76,.14)}
  .site-nav__link{
    width:100%;height:auto;
    justify-content:space-between;
    padding:14px 4px;
    border:0;
    background:none;
  }
  .site-nav__link::before{display:none}
  .site-nav__link[aria-current="page"]{background:none;border-color:transparent}
  .site-nav__link[aria-current="page"] .site-nav__label{color:var(--gold-hi)}
  .site-nav__label{
    position:static;
    order:1;
    transform:none;
    opacity:1;
    pointer-events:auto;
    padding:0;
    font-size:15.5px;
    letter-spacing:.08em;
    background:none;
    border:0;
    box-shadow:none;
    white-space:normal;
  }
  .site-nav__num{order:2;font-size:11px;letter-spacing:.2em}
  .site-nav__extra{display:block;margin-top:22px}
  .site-nav__extra .btn{width:100%}

  .frame-corner{right:14px;bottom:14px;gap:8px}
  .frame-corner__label{display:none}
  .frame-corner__top{width:40px;height:40px}

  .footer__legal-inner{padding-bottom:96px}
}

@media (max-width:720px){
  .wrap{padding:0 18px}
  .section{padding:66px 0}
  .grid--2,.grid--3{grid-template-columns:1fr}
  .board--lift{transform:none}
  .footer__inner{padding:60px 18px 36px}
  .footer__nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
  .footer__contact{grid-template-columns:1fr}
  .footer__legal-inner{padding:20px 18px 96px}
}

@media (max-width:480px){
  .footer__nav{grid-template-columns:1fr}
  .quote{padding:4px 14px}
}

/* ================= 12 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;
    transition-delay:0s !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .site-nav{transition:none}
  .card:hover,.board:hover{transform:none}
}