/* ============================================================
   豪运国际 · 共享站点样式  /assets/site.css
   档案式编排：奶油纸底 · 深靛蓝结构 · 鎏金编号 · 一像素网格
   ============================================================ */

/* ---------- 01 reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:clamp(96px,14vw,132px)}
body,h1,h2,h3,h4,h5,p,ul,ol,li,dl,dd,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--line);margin:0}
:focus-visible{outline:2px solid var(--ochre);outline-offset:3px}

/* ---------- 02 tokens ---------- */
:root{
  --ink:#16233F;
  --indigo-deep:#0E1830;
  --cream:#F4EFE4;
  --cream-deep:#E7DFCE;
  --gold:#C6A24C;
  --gold-light:#E3C97F;
  --ochre:#A8502F;
  --tea:#3F6B55;
  --stone:#8A8574;
  --line:#D8CFB8;
  --inverse:#F7F2E6;

  --ink-soft:rgba(22,35,63,.74);
  --inverse-soft:rgba(247,242,230,.74);
  --inverse-line:rgba(247,242,230,.22);

  --serif:"Source Han Serif SC","Noto Serif SC","Songti SC","SimSun",Georgia,serif;
  --sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --fs-display:clamp(2.125rem,5.2vw,3.5rem);
  --fs-h1:clamp(1.75rem,3.8vw,2.5rem);
  --fs-h2:clamp(1.375rem,2.4vw,1.75rem);
  --fs-h3:1.375rem;
  --fs-h4:1.125rem;
  --fs-body:1.0625rem;
  --fs-small:.9375rem;
  --fs-mono:.75rem;

  --shell:1240px;
  --gutter:clamp(18px,4vw,48px);
  --space-64:clamp(36px,6vw,64px);
  --space-96:clamp(48px,8vw,96px);
  --space-128:clamp(56px,10vw,128px);

  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:118px;
}

/* ---------- 03 base typography ---------- */
body{
  background:var(--cream);
  color:var(--ink);
  font-family:var(--sans);
  font-size:var(--fs-body);
  line-height:1.75;
  font-weight:400;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--serif);font-weight:800;line-height:1.3;letter-spacing:-.01em}
h1{font-size:var(--fs-h1)}
h2{font-size:var(--fs-h2)}
h3{font-size:var(--fs-h3)}
h4{font-size:var(--fs-h4)}
p{text-wrap:pretty}

.t-display{font-family:var(--serif);font-weight:900;font-size:var(--fs-display);line-height:1.18;letter-spacing:.01em}
.t-label{font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.18em;text-transform:uppercase;color:var(--ochre)}
.mono,.t-mono{font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.08em;font-variant-numeric:tabular-nums}
.num-tag{font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.16em;color:var(--gold);font-variant-numeric:tabular-nums}
.note{font-size:var(--fs-small);line-height:1.7;color:var(--stone)}
.note-box{border-left:2px solid var(--gold);background:var(--cream-deep);padding:16px 18px;font-size:var(--fs-small);line-height:1.75;color:var(--ink-soft)}
.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}
.rule{border-top:1px solid var(--line);height:0}

/* ---------- 04 shell / bands ---------- */
.shell{width:min(100% - (var(--gutter) * 2),var(--shell));margin-inline:auto}
.main-content{padding-block:clamp(24px,4vw,52px)}
#main-content:target{outline:none}
.band{padding-block:var(--space-64)}
.band--lg{padding-block:var(--space-96)}
.band--xl{padding-block:var(--space-128)}
.band--paper{background:var(--cream-deep)}
.band--deep{background:var(--indigo-deep);color:var(--inverse)}
.band--deep h1,.band--deep h2,.band--deep h3,.band--deep h4,.band--deep .t-display{color:var(--inverse)}
.band--deep .t-label{color:var(--gold-light)}
.band--deep .note,.band--deep .section-head-sum{color:var(--inverse-soft)}
.band--line{border-top:1px solid var(--line)}
.band--heavy{border-top:2px solid var(--ink)}

.skip-link{
  position:absolute;left:16px;top:-80px;z-index:400;
  background:var(--ink);color:var(--inverse);
  padding:10px 18px;font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.12em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 05 header ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:var(--cream);
  border-bottom:1px solid var(--line);
  color:var(--ink);
}
.scroll-meter{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none;overflow:hidden}
.scroll-meter-fill{display:block;height:100%;width:0;background:var(--ochre);transition:width .12s linear}
.header-inner{position:relative}

.masthead{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:end;gap:16px;
  padding:clamp(14px,2.6vw,26px) 0 clamp(8px,1.4vw,14px);
  transition:padding .28s var(--ease);
}
.masthead-brand{grid-column:2;display:block;text-align:center;padding-inline:8px}
.masthead-name{
  display:block;font-family:var(--serif);font-weight:900;
  font-size:clamp(1.75rem,4.6vw,2.75rem);line-height:1.1;letter-spacing:.06em;color:var(--ink);
  transition:font-size .28s var(--ease),color .2s var(--ease),letter-spacing .28s var(--ease);
}
.masthead-brand:hover .masthead-name{color:var(--ochre)}
.masthead-subline{
  display:block;margin-top:7px;font-family:var(--mono);font-size:var(--fs-mono);
  letter-spacing:.18em;color:var(--stone);
}
.masthead-meta{
  font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.16em;
  color:var(--stone);white-space:nowrap;transition:opacity .24s var(--ease);
}
.masthead-meta--start{grid-column:1;justify-self:start}
.masthead-meta--end{grid-column:3;justify-self:end}

.site-header[data-condensed="true"] .masthead{padding-block:8px 6px}
.site-header[data-condensed="true"] .masthead-name{font-size:clamp(1.25rem,2.4vw,1.5rem);letter-spacing:.1em}
.site-header[data-condensed="true"] .masthead-subline{display:none}
.site-header[data-condensed="true"] .masthead-meta{opacity:0;visibility:hidden}

.nav-row{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;gap:12px;
  border-top:1px solid var(--line);
}
.site-nav{display:flex;justify-content:center;min-width:0}
.nav-list{display:flex;flex-wrap:wrap;justify-content:center}
.nav-item{position:relative}
.nav-item + .nav-item::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:14px;background:var(--line);
}
.nav-link{
  position:relative;display:block;
  padding:15px clamp(11px,1.7vw,24px);
  font-size:.875rem;font-weight:500;letter-spacing:.08em;color:var(--ink);
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:9px;transform:translateX(-50%);
  width:0;height:1px;background:var(--gold);transition:width .26s var(--ease),background-color .2s var(--ease);
}
.nav-link:hover{color:var(--ochre)}
.nav-link:hover::after,.nav-link:focus-visible::after{width:calc(100% - 32px)}
.nav-link[aria-current="page"]{font-weight:700;color:var(--ink)}
.nav-link[aria-current="page"]::after{width:calc(100% - 32px);height:2px;background:var(--ochre)}

.header-actions{display:flex;align-items:center;gap:clamp(10px,1.6vw,20px);justify-self:end}
.action-link{
  font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.1em;color:var(--ink);
  padding-bottom:2px;border-bottom:1px solid var(--line);white-space:nowrap;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.action-link:hover{color:var(--ochre);border-bottom-color:var(--ochre)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:14px 4px 14px 0;
  font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.14em;color:var(--ink);
}
.nav-toggle-bars{display:grid;gap:4px;width:20px}
.nav-toggle-bars span{display:block;height:1px;background:var(--ink);transition:transform .24s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle:hover{color:var(--ochre)}
.nav-toggle:hover .nav-toggle-bars span{background:var(--ochre)}

@keyframes nav-reveal{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ---------- 06 buttons / chips ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid var(--ink);background:transparent;color:var(--ink);
  padding:11px 20px;border-radius:0;
  font-size:.875rem;font-weight:600;letter-spacing:.06em;line-height:1.2;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn:hover{border-color:var(--ochre);color:var(--ochre)}
.btn--solid{background:var(--ink);border-color:var(--ink);color:var(--inverse)}
.btn--solid:hover{background:var(--ochre);border-color:var(--ochre);color:#FFF}
.btn--gold{background:var(--gold);border-color:var(--gold);color:var(--indigo-deep)}
.btn--gold:hover{background:var(--gold-light);border-color:var(--gold-light);color:var(--indigo-deep)}
.btn--sm{padding:8px 14px;font-size:.8125rem}
.btn--block{width:100%}
.band--deep .btn--line{color:var(--inverse);border-color:var(--inverse-line)}
.band--deep .btn--line:hover{color:var(--gold-light);border-color:var(--gold-light)}
.band--deep :focus-visible,.site-footer :focus-visible{outline-color:var(--gold-light)}

.code-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 10px;border:1px solid var(--line);background:var(--cream-deep);
  font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.08em;
  font-variant-numeric:tabular-nums;color:var(--ink);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.code-chip:hover{border-color:var(--ochre);color:var(--ochre)}
.code-chip-flag{opacity:0;color:var(--tea);transition:opacity .2s var(--ease)}
.code-chip[data-copied="true"]{border-color:var(--tea)}
.code-chip[data-copied="true"] .code-chip-flag{opacity:1}

/* ---------- 07 breadcrumb / section head ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;gap:0 8px;align-items:baseline;font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--stone)}
.breadcrumb li{display:flex;align-items:baseline;gap:8px}
.breadcrumb li + li::before{content:"／";color:var(--line)}
.breadcrumb a{color:var(--stone);border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.breadcrumb a:hover{color:var(--ochre);border-bottom-color:var(--ochre)}
.breadcrumb [aria-current="page"]{color:var(--ink)}
.band--deep .breadcrumb,.band--deep .breadcrumb a{color:var(--inverse-soft)}
.band--deep .breadcrumb [aria-current="page"]{color:var(--inverse)}

.section-head{display:grid;gap:10px;padding-top:18px;border-top:2px solid var(--ink);margin-bottom:clamp(20px,3vw,36px)}
.section-head--light{border-top-color:var(--line)}
.section-head-title{font-size:var(--fs-h2)}
.section-head-sum{max-width:34em;font-size:var(--fs-small);line-height:1.75;color:var(--ink-soft)}
.band--deep .section-head{border-top-color:var(--gold)}
.band--paper .section-head{border-top-color:var(--ink)}

/* ---------- 08 prose ---------- */
.prose{max-width:34em;font-size:var(--fs-body);line-height:1.75}
.prose > * + *{margin-top:1.1em}
.prose h2{font-size:var(--fs-h2);margin-top:1.9em}
.prose h3{font-size:var(--fs-h3);margin-top:1.6em}
.prose a{color:var(--ochre);border-bottom:1px solid rgba(168,80,47,.45);transition:border-color .2s var(--ease)}
.prose a:hover{border-bottom-color:var(--ochre)}
.prose ul>li{position:relative;padding-left:1.5em}
.prose ul>li+li{margin-top:.5em}
.prose ul>li::before{content:"—";position:absolute;left:0;color:var(--gold)}
.prose strong{font-weight:700}
.band--deep .prose a{color:var(--gold-light);border-bottom-color:rgba(227,201,127,.45)}

/* ---------- 09 tables ---------- */
.data-table{font-size:var(--fs-small);border-top:2px solid var(--ink)}
.data-table caption{text-align:left;font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.12em;color:var(--stone);padding-bottom:10px}
.data-table th{
  font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.12em;text-transform:uppercase;
  color:var(--stone);font-weight:500;text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);
}
.data-table td{padding:14px;border-bottom:1px solid var(--line);vertical-align:top}
.data-table tbody tr:nth-child(even){background:var(--cream-deep)}
.data-table .num,.data-table td.num{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.band--deep .data-table{border-top-color:var(--gold);color:var(--inverse)}
.band--deep .data-table th{color:var(--gold-light);border-bottom-color:var(--inverse-line)}
.band--deep .data-table td{border-bottom-color:var(--inverse-line)}
.band--deep .data-table tbody tr:nth-child(even){background:rgba(247,242,230,.05)}

/* ---------- 10 index rail ---------- */
.index-rail{position:sticky;top:calc(var(--header-h) + 24px);display:grid;gap:2px}
.index-rail-link{
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;align-items:baseline;
  padding:7px 0 7px 12px;border-left:1px solid var(--line);
  font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.1em;color:var(--stone);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.index-rail-num{color:var(--gold)}
.index-rail-link:hover{color:var(--ochre)}
.index-rail-link[aria-current]{color:var(--ink);border-left:2px solid var(--ochre);padding-left:11px}
.band--deep .index-rail-link{border-left-color:var(--inverse-line);color:var(--inverse-soft)}
.band--deep .index-rail-link[aria-current]{color:var(--inverse);border-left-color:var(--gold)}

/* ---------- 11 media frames ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  background:var(--cream-deep);border:1px solid var(--line);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(to right,rgba(22,35,63,.07) 0 1px,transparent 1px 80px),
    repeating-linear-gradient(to bottom,rgba(22,35,63,.07) 0 1px,transparent 1px 80px);
  opacity:.6;
}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.94) contrast(1.03)}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--3x4{aspect-ratio:3/4}
.media-frame--on-dark{background:#12203A;border-color:var(--inverse-line)}
.media-frame--on-dark::after{
  background-image:
    repeating-linear-gradient(to right,rgba(247,242,230,.09) 0 1px,transparent 1px 80px),
    repeating-linear-gradient(to bottom,rgba(247,242,230,.09) 0 1px,transparent 1px 80px);
}
.figure-caption{margin-top:10px;font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.08em;color:var(--stone);line-height:1.6}

/* ---------- 12 grid utilities ---------- */
.grid{display:grid;gap:clamp(18px,2.6vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--main-side{grid-template-columns:minmax(0,7fr) minmax(0,4fr)}
.grid--side-main{grid-template-columns:minmax(0,4fr) minmax(0,8fr)}

/* ---------- 13 motion ---------- */
.js-ready [data-reveal]{opacity:0;transform:translateY(12px)}
.js-ready [data-reveal]{
  transition:opacity .4s var(--ease),transform .4s var(--ease);
  transition-delay:calc(var(--reveal-i,0) * 60ms);
}
.js-ready [data-reveal][data-revealed="true"]{opacity:1;transform:none}

/* ---------- 14 footer ---------- */
.site-footer{
  background:var(--indigo-deep);color:var(--inverse);
  border-top:1px solid var(--gold);
}
.footer-shell{
  display:grid;grid-template-columns:minmax(220px,1fr) minmax(0,2.4fr);
  gap:clamp(28px,5vw,72px);
  padding-block:clamp(36px,6vw,68px);
}
.footer-brand-name{font-family:var(--serif);font-weight:900;font-size:1.75rem;letter-spacing:.08em;color:var(--inverse)}
.footer-brand-sub{margin-top:8px;font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.16em;color:var(--gold-light)}
.footer-brand-note{margin-top:14px;max-width:30ch;font-size:var(--fs-small);line-height:1.75;color:var(--inverse-soft)}
.footer-columns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,3vw,40px)}
.footer-col-title{
  font-family:var(--mono);font-size:var(--fs-mono);font-weight:500;letter-spacing:.18em;text-transform:uppercase;
  color:var(--gold);padding-bottom:12px;border-bottom:1px solid var(--inverse-line);
}
.footer-list{margin-top:14px;display:grid;gap:10px}
.footer-list a{
  font-size:var(--fs-small);color:rgba(247,242,230,.88);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-list a:hover{color:var(--gold-light);border-bottom-color:var(--gold-light)}
.footer-text{font-size:.875rem;line-height:1.7;color:var(--inverse-soft)}
.footer-text-key{display:inline-block;margin-right:.5em;font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.12em;color:var(--stone)}
.footer-mono{font-family:var(--mono);font-size:.8125rem;letter-spacing:.06em;font-variant-numeric:tabular-nums;color:rgba(247,242,230,.9);word-break:break-all}
.footer-meta{border-top:1px solid var(--inverse-line)}
.footer-meta-inner{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  padding-block:18px;font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.08em;
  color:rgba(247,242,230,.64);
}

/* ---------- 15 responsive ---------- */
@media (max-width:1180px){
  :root{--header-h:108px}
}
@media (max-width:1080px){
  .footer-shell{grid-template-columns:1fr;gap:34px}
}
@media (max-width:960px){
  :root{--header-h:96px}
  .masthead-meta{display:none}
  .masthead{grid-template-columns:1fr;padding-block:12px 8px}
  .masthead-brand{grid-column:1}
  .nav-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px}
  .nav-toggle{display:inline-flex}
  .site-nav{order:3;flex-basis:100%;display:none;justify-content:flex-start;border-top:1px solid var(--line);margin-top:6px}
  .site-nav[data-open]{display:block;animation:nav-reveal .26s var(--ease) both}
  .nav-list{flex-direction:column;align-items:stretch;padding-block:4px}
  .nav-item{border-bottom:1px solid var(--line)}
  .nav-item:last-child{border-bottom:0}
  .nav-item + .nav-item::before{display:none}
  .nav-link{padding:15px 2px;font-size:1rem;letter-spacing:.04em}
  .nav-link::after{left:2px;transform:none;bottom:11px;width:0}
  .nav-link:hover::after{width:32px}
  .nav-link[aria-current="page"]::after{width:32px}
  .header-actions{gap:10px}
  .header-actions-item:not(:nth-child(2)){display:none}
  .grid--2,.grid--3,.grid--4,.grid--main-side,.grid--side-main{grid-template-columns:1fr}
  .index-rail{position:static;top:auto}
}
@media (max-width:760px){
  .footer-columns{grid-template-columns:1fr;gap:26px}
  .footer-meta-inner{flex-direction:column;gap:6px}
  .data-table thead{display:none}
  .data-table,.data-table tbody,.data-table tr,.data-table td{display:block;width:100%}
  .data-table tr{border-bottom:1px solid var(--line);padding:6px 0}
  .data-table tbody tr:nth-child(even){background:transparent}
  .data-table td{border-bottom:0;padding:6px 2px}
  .data-table td.num{text-align:left}
}

/* ---------- 16 reduced motion ---------- */
@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:0ms !important;
  }
  .js-ready [data-reveal]{opacity:1;transform:none}
  .scroll-meter-fill{transition:none}
}