/* =========================================================
   优乐在线 · YOULE ONLINE
   共享外壳样式表 —— /assets/site.css
   reset / tokens / 中文排版 / 头部 / 页脚 / 基础组件
   ========================================================= */

/* ---------- 01 reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd,hr{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
hr{border:0}

/* ---------- 02 tokens ---------- */
:root{
  --ink:#1B2A4A;
  --ink-deep:#101B33;
  --orange:#FF5A3C;
  --orange-deep:#DD3E22;
  --gold:#FFB347;
  --teal:#00C9A7;
  --teal-ink:#007A66;
  --peach:#FFF3EC;
  --cream:#FFF8E9;
  --porcelain:#FCFBF9;
  --graphite:#55607A;
  --white:#FFFFFF;

  --radius-xl:40px;
  --radius-lg:28px;
  --radius-md:20px;
  --radius-sm:12px;

  --shadow-hard:6px 6px 0 var(--ink-deep);
  --shadow-hard-sm:4px 4px 0 var(--ink-deep);
  --shadow-hard-lg:10px 10px 0 var(--ink-deep);

  --wrap:1200px;
  --wrap-narrow:760px;
  --gutter:clamp(18px,4vw,40px);
  --header-h:68px;

  --mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ease:cubic-bezier(.2,.7,.3,1);
}
@media (min-width:1024px){:root{--header-h:80px}}

/* ---------- 03 base ---------- */
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 28px)}
body{
  font-family:var(--sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--porcelain);
  letter-spacing:.005em;
}
h1,h2,h3,h4,h5{font-weight:900;line-height:1.18;letter-spacing:-.02em}
::selection{background:var(--gold);color:var(--ink-deep)}

:focus-visible{outline:3px solid var(--teal);outline-offset:3px;border-radius:6px}
.site-header :focus-visible,.site-footer :focus-visible{outline-color:var(--gold)}

/* ---------- 04 typography ---------- */
.display{display:inline-block;transform:skewX(-3deg);transform-origin:left bottom}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.t-hero{font-size:clamp(38px,7.4vw,88px);line-height:1.04}
.t-xl{font-size:clamp(30px,4.6vw,54px);line-height:1.1}
.t-lg{font-size:clamp(23px,3vw,34px);line-height:1.2}
.t-md{font-size:clamp(18px,2vw,22px);line-height:1.4}
.t-sm{font-size:15px}
.text-graphite{color:var(--graphite)}
.text-orange{color:var(--orange)}
.text-teal{color:var(--teal-ink)}
.max-760{max-width:var(--wrap-narrow)}
.index-num{
  display:block;
  font-family:var(--mono);
  font-weight:700;
  font-size:clamp(46px,8vw,96px);
  line-height:.85;
  letter-spacing:-.05em;
  color:var(--gold);
}
.index-num--solid{color:var(--orange)}
.kicker{
  display:flex;align-items:center;gap:12px;
  font-family:var(--mono);font-size:12px;letter-spacing:.18em;
  color:var(--orange);margin-bottom:14px;
}
.kicker::before{content:"";width:32px;height:2px;background:var(--orange);flex:0 0 auto}
.lede{font-size:17px;line-height:1.85;color:var(--graphite);max-width:760px}
@media (min-width:768px){.lede{font-size:18px}}
.dot-list{margin-top:12px}
.dot-list li{position:relative;padding-left:20px;margin-bottom:8px;font-size:15px;color:var(--graphite)}
.dot-list li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border-radius:2px;background:var(--gold)}

/* ---------- 05 layout ---------- */
.wrap{width:min(100% - var(--gutter) * 2,var(--wrap));margin-inline:auto}
.wrap--narrow{width:min(100% - var(--gutter) * 2,var(--wrap-narrow));margin-inline:auto}
.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(30px,4vw,56px)}
.section--peach{background:var(--peach)}
.section--cream{background:var(--cream)}
.section--ink{background:var(--ink);color:var(--porcelain)}
.section--ink .lede,.section--ink .stat-label,.section--ink .dot-list li{color:rgba(252,251,249,.72)}
.section--ink .kicker{color:var(--gold)}
.section--ink .kicker::before{background:var(--gold)}
.rule{height:2px;background:var(--ink-deep);margin-block:clamp(28px,4vw,52px)}
.rule--gold{background:var(--gold)}
.bleed-top{margin-top:calc(-1 * var(--header-h))}

.section-head{max-width:780px;margin-bottom:clamp(28px,4vw,48px)}
.section-head--split{display:grid;gap:20px;max-width:none}
@media (min-width:900px){
  .section-head--split{grid-template-columns:minmax(0,1fr) minmax(0,420px);align-items:end}
}

.bento{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.2vw,26px)}
.span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9,.span-12{grid-column:span 12}
@media (min-width:768px){
  .span-3,.span-4,.span-5,.span-6{grid-column:span 6}
  .span-7{grid-column:span 7}
  .span-8{grid-column:span 8}
  .span-9{grid-column:span 12}
}
@media (min-width:1024px){
  .span-3{grid-column:span 3}
  .span-4{grid-column:span 4}
  .span-5{grid-column:span 5}
  .span-6{grid-column:span 6}
  .span-7{grid-column:span 7}
  .span-8{grid-column:span 8}
  .span-9{grid-column:span 9}
}

/* ---------- 06 buttons / tags / links ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.68em 1.25em;
  font-size:15px;font-weight:800;line-height:1.2;letter-spacing:.01em;
  border:2px solid var(--ink-deep);border-radius:999px;
  background:var(--white);color:var(--ink);
  box-shadow:var(--shadow-hard-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),
             background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink-deep)}
.btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--ink-deep)}
.btn--primary{background:var(--orange);color:#fff}
.btn--primary:hover{background:var(--orange-deep)}
.btn--teal{background:var(--teal);color:#04352D}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--ink);box-shadow:none}
.btn--ghost:hover{background:rgba(255,90,60,.09);border-color:var(--orange);color:var(--orange);transform:none;box-shadow:none}
.btn--sm{padding:.5em .95em;font-size:13px}
.site-header .btn--ghost{color:rgba(252,251,249,.92);border-color:rgba(252,251,249,.5)}
.site-header .btn--ghost:hover{color:var(--gold);border-color:var(--gold);background:rgba(255,179,71,.14)}

.link-u{position:relative;display:inline-block;color:var(--ink);font-weight:600}
.link-u::after{
  content:"";position:absolute;left:0;bottom:-2px;width:100%;height:2px;background:var(--orange);
  transform:scaleX(0);transform-origin:left center;transition:transform .18s var(--ease);
}
.link-u:hover::after,.link-u:focus-visible::after{transform:scaleX(1)}

.tag{
  display:inline-flex;align-items:center;gap:.4em;
  padding:.25em .72em;border:2px solid var(--ink-deep);border-radius:999px;
  font-size:12px;font-weight:700;line-height:1.6;background:var(--cream);color:var(--ink);
}
.tag--gold{background:var(--gold);color:var(--ink-deep)}
.tag--teal{background:var(--teal);color:#04352D}
.tag--outline{background:transparent;color:inherit;border-color:currentColor;border-style:dashed}

/* ---------- 07 breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--graphite);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--graphite);border-bottom:2px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease)}
.breadcrumb a:hover{color:var(--orange);border-bottom-color:var(--orange)}
.crumb-sep{color:var(--gold)}

/* ---------- 08 cards / stats / callout ---------- */
.card{
  position:relative;
  padding:clamp(20px,2.8vw,32px);
  background:var(--white);
  border:2px solid var(--ink-deep);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-hard);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.card:hover{transform:translate(-2px,-4px);box-shadow:var(--shadow-hard-lg);border-color:var(--orange)}
.card--peach{background:var(--peach)}
.card--cream{background:var(--cream)}
.card--ink{background:var(--ink);color:var(--porcelain)}
.card--ink .stat-label,.card--ink .text-graphite{color:rgba(252,251,249,.7)}
.card--focus{
  background:
    radial-gradient(120% 110% at 100% 0%,rgba(255,179,71,.55) 0%,rgba(255,179,71,0) 58%),
    linear-gradient(135deg,var(--orange) 0%,#FF7A3C 48%,var(--gold) 100%);
  color:#fff;border-radius:var(--radius-xl);
}
.card--focus .lede,.card--focus .stat-label{color:rgba(255,255,255,.9)}
.card-title{font-size:clamp(19px,2.2vw,24px);font-weight:900;margin-bottom:10px}
.card-meta{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--graphite);margin-bottom:10px}
.card--ink .card-meta,.card--focus .card-meta{color:rgba(252,251,249,.78)}

.stat{display:flex;flex-direction:column;gap:6px}
.stat-num{
  display:block;font-family:var(--mono);font-weight:700;
  font-size:clamp(38px,6vw,84px);line-height:.9;letter-spacing:-.045em;color:var(--orange);
}
.stat-num--gold{color:var(--gold)}
.stat-num--teal{color:var(--teal-ink)}
.stat-label{font-size:14px;color:var(--graphite)}

.callout{
  border-left:6px solid var(--teal);
  background:var(--cream);
  padding:18px 22px;
  border-radius:0 var(--radius-md) var(--radius-md) 0;
}
.callout .callout-title{font-weight:800;color:var(--teal-ink);margin-bottom:6px}

/* ---------- 09 fold (details) ---------- */
.fold{
  border:2px solid var(--ink-deep);
  border-radius:var(--radius-md);
  background:var(--white);
  box-shadow:var(--shadow-hard-sm);
  overflow:hidden;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.fold + .fold{margin-top:14px}
.fold[open]{border-color:var(--orange);box-shadow:var(--shadow-hard)}
.fold > summary{
  display:flex;gap:12px;align-items:flex-start;
  padding:16px 20px;font-weight:700;cursor:pointer;list-style:none;
}
.fold > summary::-webkit-details-marker{display:none}
.fold > summary::before{
  content:"＋";font-family:var(--mono);color:var(--orange);flex:0 0 auto;line-height:1.5;
}
.fold[open] > summary::before{content:"－"}
.fold-body{
  padding:4px 20px 20px 20px;
  border-top:2px dashed rgba(16,27,51,.16);
  font-size:15px;color:var(--graphite);
}
.fold-body > * + *{margin-top:10px}

/* ---------- 10 media ---------- */
.media{
  position:relative;overflow:hidden;
  border:2px solid var(--ink-deep);
  border-radius:var(--radius-lg);
  background:linear-gradient(135deg,var(--peach) 0%,var(--cream) 58%,#FFE7CE 100%);
  box-shadow:var(--shadow-hard);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:16/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media--soft{border-radius:var(--radius-md);box-shadow:none}
.media-glow::after{
  content:"";position:absolute;right:-12%;top:-22%;width:72%;height:72%;
  background:radial-gradient(circle at 50% 50%,rgba(255,90,60,.42),rgba(255,179,71,.26) 46%,rgba(255,179,71,0) 72%);
  pointer-events:none;
}
.media-label{
  position:absolute;left:16px;bottom:16px;
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  background:var(--ink);color:var(--porcelain);padding:5px 11px;border-radius:999px;
}
.media-placeholder{
  display:grid;place-items:center;text-align:center;aspect-ratio:16/10;padding:24px;
  background-image:repeating-linear-gradient(135deg,rgba(27,42,74,.07) 0 10px,transparent 10px 20px);
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--graphite);
}
.motif-bg{
  background-image:
    linear-gradient(135deg,transparent 47%,var(--gold) 47%,var(--gold) 53%,transparent 53%),
    linear-gradient(45deg,transparent 47%,var(--gold) 47%,var(--gold) 53%,transparent 53%);
  background-size:72px 72px;
}

/* ---------- 11 header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--ink);
  color:var(--porcelain);
  border-bottom:3px solid var(--ink-deep);
  transition:background .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header[data-scrolled]{
  border-bottom-color:var(--gold);
  box-shadow:0 6px 0 rgba(16,27,51,.16);
}
.site-header[data-overlay="true"]:not([data-scrolled]){
  background:linear-gradient(180deg,rgba(16,27,51,.94) 0%,rgba(16,27,51,.74) 46%,rgba(16,27,51,0) 100%);
  border-bottom-color:transparent;
  box-shadow:none;
}
.header-shell{position:relative}
.header-inner{
  width:min(100% - var(--gutter) * 2,1380px);
  margin-inline:auto;
  min-height:var(--header-h);
  display:flex;align-items:center;gap:clamp(12px,2vw,26px);
}

.skip-link{
  position:absolute;left:14px;top:-72px;z-index:120;
  padding:10px 18px;background:var(--gold);color:var(--ink-deep);
  font-weight:800;border:2px solid var(--ink-deep);border-bottom-left-radius:14px;border-bottom-right-radius:14px;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:0}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:40px;height:40px;flex:0 0 auto;display:grid;place-items:center;
  border-radius:12px;border:2px solid var(--ink-deep);
  background:linear-gradient(135deg,var(--orange),var(--gold));
  color:#fff;font-weight:900;font-size:19px;
  box-shadow:3px 3px 0 rgba(16,27,51,.6);
  transform:skewX(-6deg);
}
.brand-text{display:flex;flex-direction:column;line-height:1.06}
.brand-name{font-size:18px;font-weight:900;letter-spacing:-.01em;color:var(--porcelain)}
.brand-en{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--gold)}
.brand-tag{
  display:none;font-family:var(--mono);font-size:11px;letter-spacing:.1em;
  padding:3px 10px;border:1px dashed rgba(252,251,249,.45);border-radius:999px;
  color:rgba(252,251,249,.85);white-space:nowrap;
}
@media (min-width:1024px){.brand-tag{display:inline-block}}

.site-nav{
  position:absolute;top:100%;left:0;right:0;
  display:none;flex-direction:column;
  background:var(--ink);
  border-top:1px solid rgba(252,251,249,.14);
  border-bottom:3px solid var(--gold);
  padding:12px var(--gutter) 26px;
  max-height:calc(100vh - var(--header-h));
  max-height:calc(100dvh - var(--header-h));
  overflow-y:auto;
}
.site-nav[data-open]{display:flex}
.nav-list{display:flex;flex-direction:column}
.nav-link{
  position:relative;display:flex;align-items:center;justify-content:space-between;
  padding:14px 4px;
  font-size:17px;font-weight:700;
  color:rgba(252,251,249,.9);
  border-bottom:1px dashed rgba(252,251,249,.18);
  transition:color .18s var(--ease),padding-left .18s var(--ease),background-color .18s var(--ease);
}
.nav-link:hover{color:#fff;padding-left:12px;background:rgba(255,179,71,.1)}
.nav-link[aria-current="page"]{color:var(--gold);border-bottom:2px solid var(--gold)}
.nav-tail{display:flex;flex-direction:column;gap:10px;margin-top:22px}
.nav-tail .btn{width:100%}

.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.lang-switch{
  display:inline-flex;align-items:center;gap:4px;
  padding:7px 11px;border:2px solid rgba(252,251,249,.4);border-radius:999px;
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;
  color:rgba(252,251,249,.75);
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.lang-switch:hover{border-color:var(--gold);color:#fff;background:rgba(255,179,71,.12)}
.lang-sep{color:rgba(252,251,249,.35)}
.lang-switch .is-active{color:var(--gold);font-weight:700}
.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 12px;border:2px solid rgba(252,251,249,.45);border-radius:14px;
  color:var(--porcelain);
  transition:border-color .18s var(--ease),background-color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);background:rgba(255,179,71,.12)}
.nav-toggle-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em}
.nav-toggle-box{display:grid;gap:4px;width:18px}
.nav-toggle-box span{display:block;height:2px;background:currentColor;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.scroll-progress{
  position:absolute;left:0;bottom:-3px;width:100%;height:3px;
  background:linear-gradient(90deg,var(--orange),var(--gold) 55%,var(--teal));
  transform:scaleX(0);transform-origin:left center;
  transition:transform .12s linear;
}

@media (min-width:1024px){
  .site-nav{
    position:static;display:flex;flex-direction:row;align-items:center;
    gap:clamp(6px,1.6vw,20px);
    margin-left:auto;
    background:none;border:0;padding:0;overflow:visible;max-height:none;
  }
  .nav-list{flex-direction:row;align-items:center;gap:clamp(4px,1.4vw,18px)}
  .nav-link{
    display:inline-block;padding:8px 2px;font-size:15px;font-weight:600;
    border-bottom:0;color:rgba(252,251,249,.86);
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--gold);
    transform:scaleX(0);transform-origin:left center;transition:transform .18s var(--ease);
  }
  .nav-link:hover{padding-left:2px;background:none;color:#fff}
  .nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
  .nav-link[aria-current="page"]{color:var(--gold);border-bottom:0}
  .nav-link[aria-current="page"]::after{transform:scaleX(1)}
  .nav-tail{
    flex-direction:row;align-items:center;gap:10px;margin-top:0;
    margin-left:clamp(4px,1vw,14px);padding-left:clamp(8px,1.4vw,18px);
    border-left:1px dashed rgba(252,251,249,.3);
  }
  .nav-tail .btn{width:auto}
  .header-actions{margin-left:0}
  .nav-toggle{display:none}
}

/* ---------- 12 footer ---------- */
.site-footer{
  position:relative;
  background:var(--ink);
  color:rgba(252,251,249,.82);
  border-top:3px solid var(--ink-deep);
  padding-block:clamp(44px,6vw,76px) clamp(26px,3vw,40px);
}
.footer-pattern{
  position:absolute;inset:0;opacity:.08;pointer-events:none;
  background-image:
    linear-gradient(135deg,transparent 47%,var(--gold) 47%,var(--gold) 53%,transparent 53%),
    linear-gradient(45deg,transparent 47%,var(--gold) 47%,var(--gold) 53%,transparent 53%);
  background-size:72px 72px;
}
.footer-inner{
  position:relative;z-index:1;
  width:min(100% - var(--gutter) * 2,var(--wrap));
  margin-inline:auto;
}
.footer-top{display:grid;grid-template-columns:1fr;gap:clamp(28px,4vw,52px)}
@media (min-width:900px){.footer-top{grid-template-columns:minmax(260px,1fr) 1.7fr}}

.footer-lockup{
  display:inline-block;font-size:21px;font-weight:900;letter-spacing:-.01em;
  color:var(--porcelain);text-decoration:none;
  border-bottom:2px solid transparent;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.footer-lockup:hover{color:var(--gold);border-bottom-color:var(--gold)}
.footer-summary{margin-top:12px;font-size:14px;line-height:1.8;color:rgba(252,251,249,.7);max-width:32ch}
.footer-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.footer-badges .tag{background:transparent;border-color:currentColor}
.footer-badges .tag--gold{color:var(--gold);border-color:rgba(255,179,71,.6)}
.footer-badges .tag--teal{color:var(--teal);border-color:rgba(0,201,167,.55)}
.footer-badges .tag--outline{color:rgba(252,251,249,.78)}

.footer-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px clamp(16px,3vw,32px)}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.footer-col-title{
  font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:.18em;
  color:var(--gold);margin-bottom:14px;
}
.footer-list li{margin-bottom:2px}
.footer-link{
  position:relative;display:inline-block;padding:5px 0;
  font-size:14px;color:rgba(252,251,249,.78);text-decoration:none;word-break:break-all;
  transition:color .18s var(--ease);
}
.footer-link::after{
  content:"";position:absolute;left:0;bottom:2px;width:100%;height:1px;background:var(--gold);
  transform:scaleX(0);transform-origin:left center;transition:transform .18s var(--ease);
}
.footer-link:hover{color:var(--gold)}
.footer-link:hover::after{transform:scaleX(1)}

.footer-contact{
  margin-top:clamp(30px,4vw,48px);
  padding-top:clamp(20px,3vw,30px);
  border-top:1px dashed rgba(252,251,249,.25);
  display:grid;grid-template-columns:1fr;gap:16px;
}
@media (min-width:768px){.footer-contact{grid-template-columns:repeat(3,minmax(0,1fr))}}
.contact-item{display:flex;flex-direction:column;gap:4px}
.contact-label{font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--gold)}
.contact-value{font-size:15px;line-height:1.7;color:var(--porcelain);word-break:break-all}
a.contact-value{border-bottom:2px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease)}
a.contact-value:hover{color:var(--gold);border-bottom-color:var(--gold)}
.footer-contact-note{margin-top:14px;font-size:13px;color:rgba(252,251,249,.6)}

.footer-meta{
  margin-top:clamp(24px,3vw,34px);
  padding-top:18px;
  border-top:2px solid rgba(252,251,249,.16);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:8px 22px;
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:rgba(252,251,249,.62);
}
.footer-note-line{
  flex-basis:100%;font-family:var(--sans);font-size:13px;letter-spacing:0;
  color:rgba(252,251,249,.55);
}

/* ---------- 13 to-top ---------- */
.to-top{
  position:fixed;right:clamp(16px,3vw,32px);bottom:clamp(16px,3vw,32px);z-index:70;
  width:52px;height:52px;display:grid;place-items:center;
  border:2px solid var(--ink-deep);border-radius:50%;
  background:var(--gold);color:var(--ink-deep);
  font-size:20px;font-weight:900;line-height:1;
  box-shadow:var(--shadow-hard-sm);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease),
             background-color .18s var(--ease),box-shadow .18s var(--ease);
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--orange);color:#fff;box-shadow:6px 6px 0 var(--ink-deep)}
.to-top:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--ink-deep)}

/* ---------- 14 i18n hooks ---------- */
html:not([data-lang]) .i18n-en,
html[data-lang="zh"] .i18n-en{display:none}
html[data-lang="en"] .i18n-zh{display:none}

/* ---------- 15 reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .card:hover{transform:none}
  .btn:hover{transform:none}
  .to-top[data-visible]{transform:none}
}