/* =========================================================
   利赢国际 · /assets/site.css
   共享外壳：reset / tokens / header / footer / 通用组件
   ========================================================= */

/* ---------- 1. Tokens ---------- */
:root{
  --ink-900:#0B1B2E;
  --ink-800:#13293E;
  --ink-700:#1B3A54;
  --paper:#F5F2EA;
  --paper-dim:rgba(245,242,234,.72);
  --stone:#8B949C;
  --cyan:#1FE3C9;
  --cyan-deep:#0F6B62;
  --gold:#E3B24B;
  --moss:#4E6B54;
  --clay:#C1663F;
  --steel:#5B8FB3;
  --line:rgba(139,148,156,.30);
  --line-soft:rgba(139,148,156,.16);
  --shell:1240px;
  --gutter:clamp(16px,4vw,40px);
  --header-offset:clamp(86px,9vw,108px);
  --radius-pill:999px;
  --radius-panel:18px;
  --ease:cubic-bezier(.2,.6,.3,1);
  --font-head:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Inter","Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Cascadia Mono","Courier New",monospace;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--header-offset)}
body{
  margin:0;
  padding-top:var(--header-offset);
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6{margin:0;font-family:var(--font-head);font-weight:900;letter-spacing:-.02em;line-height:1.12}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
dl,dd,dt{margin:0}
a{color:var(--steel);text-decoration:none;transition:color .16s var(--ease)}
a:hover{color:var(--cyan)}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg{display:block;max-width:100%}
address{font-style:normal}
strong{font-weight:700}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:3px}
::selection{background:var(--cyan);color:var(--ink-900)}

/* ---------- 3. Skip link ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:120;
  transform:translateY(-180%);
  padding:10px 18px;border-radius:var(--radius-pill);
  background:var(--cyan);color:var(--ink-900);
  font-size:14px;font-weight:700;
  transition:transform .18s var(--ease);
}
.skip-link:hover{color:var(--ink-900)}
.skip-link:focus{transform:none;color:var(--ink-900)}

/* ---------- 4. Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  padding:clamp(10px,1.4vw,16px) var(--gutter);
}
.progress-rail{
  position:absolute;top:0;left:0;right:0;height:2px;
  background:rgba(139,148,156,.20);
}
.progress-bar{display:block;height:100%;width:0;background:var(--cyan);transition:width .12s linear}

.header-inner{
  position:relative;
  max-width:var(--shell);margin-inline:auto;
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;gap:10px;
}

/* 品牌浮岛 */
.brand{
  display:inline-flex;align-items:center;gap:10px;
  padding:7px 16px 7px 8px;
  background:rgba(19,41,62,.88);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-pill);
  color:var(--paper);
  box-shadow:0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(10px);
  transition:border-color .16s var(--ease),background-color .16s var(--ease);
}
.brand:hover{color:var(--paper);border-color:rgba(31,227,201,.45);background:rgba(19,41,62,.96)}
.brand-mark{
  display:grid;place-items:center;
  width:28px;height:28px;border-radius:9px;
  background:var(--cyan);color:var(--ink-900);
  font-family:var(--font-head);font-weight:900;font-size:15px;line-height:1;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-family:var(--font-head);font-weight:800;font-size:15px;letter-spacing:.02em;white-space:nowrap}
.brand-status{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;color:var(--gold);
  max-height:0;opacity:0;overflow:hidden;
  transition:max-height .2s var(--ease),opacity .2s var(--ease),margin-top .2s var(--ease);
}
.site-header[data-scrolled] .brand-status{max-height:16px;opacity:1;margin-top:3px}

/* 栏目胶囊 */
.nav-capsule{
  justify-self:center;
  display:flex;align-items:center;
  padding:5px;
  background:rgba(19,41,62,.88);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-pill);
  box-shadow:0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(10px);
}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{display:flex}
.nav-link{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:var(--radius-pill);
  border:1px solid transparent;
  color:var(--paper-dim);font-size:14px;line-height:1.25;white-space:nowrap;
  transition:color .16s var(--ease),background-color .16s var(--ease),border-color .16s var(--ease);
}
.nav-link:hover{color:var(--cyan);background:rgba(31,227,201,.07);border-color:rgba(31,227,201,.35)}
.nav-index{display:none;font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;color:var(--gold)}
.nav-label{display:inline}
.nav-link[aria-current="page"]{background:var(--cyan);color:var(--ink-900);font-weight:600}
.nav-link[aria-current="page"] .nav-index{color:var(--ink-900)}
.site-header[data-scrolled] .nav-label{display:none}
.site-header[data-scrolled] .nav-index{display:inline}
.site-header[data-scrolled] .nav-link{padding:7px 12px}

/* 工具浮岛 */
.header-tools{
  display:flex;align-items:center;gap:6px;
  padding:5px;
  background:rgba(19,41,62,.88);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-pill);
  box-shadow:0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(10px);
}
.icon-btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 15px;border-radius:var(--radius-pill);
  border:1px solid transparent;
  color:var(--paper-dim);font-size:14px;line-height:1.25;
  transition:color .16s var(--ease),background-color .16s var(--ease),border-color .16s var(--ease);
}
.icon-btn:hover{color:var(--cyan);border-color:rgba(31,227,201,.35);background:rgba(31,227,201,.07)}
.icon-btn[aria-expanded="true"]{color:var(--ink-900);background:var(--cyan)}
.icon-btn-glyph{
  position:relative;display:inline-block;
  width:11px;height:11px;border:2px solid currentColor;border-radius:50%;
}
.icon-btn-glyph::after{
  content:"";position:absolute;right:-5px;bottom:-4px;
  width:6px;height:2px;background:currentColor;transform:rotate(45deg);
}
.icon-btn-text{white-space:nowrap}

/* 汉堡按钮 */
.nav-toggle{
  display:none;
  width:40px;height:34px;
  flex-direction:column;align-items:center;justify-content:center;gap:3px;
  border:1px solid transparent;border-radius:var(--radius-pill);
  color:var(--paper);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.nav-toggle:hover{color:var(--cyan);border-color:rgba(31,227,201,.35)}
.nav-toggle-bar{
  width:16px;height:2px;border-radius:1px;background:currentColor;
  transition:transform .18s var(--ease),opacity .12s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 检索面板 */
.search-panel{
  position:fixed;z-index:70;
  top:calc(var(--header-offset) - 12px);left:50%;
  transform:translateX(-50%);
  width:min(680px,calc(100vw - 2*var(--gutter)));
  padding:clamp(16px,2.4vw,22px);
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius-panel);
  box-shadow:0 28px 64px rgba(0,0,0,.5),0 1px 0 rgba(255,255,255,.06);
}
.search-panel[hidden]{display:none}
.search-inner{display:block}
.search-label{
  display:block;margin-bottom:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--gold);text-transform:uppercase;
}
.search-input{
  width:100%;padding:12px 14px;
  background:var(--ink-900);color:var(--paper);
  border:1px solid var(--line);border-radius:12px;
  font-family:var(--font-body);font-size:16px;line-height:1.5;
}
.search-input::placeholder{color:var(--stone)}
.search-input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 2px rgba(31,227,201,.35)}
.search-meta{margin:10px 0 0;font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;color:var(--stone)}
.search-results{
  margin-top:12px;border-top:1px solid var(--line-soft);
  max-height:min(54vh,420px);overflow-y:auto;
}
.search-result + .search-result{border-top:1px solid var(--line-soft)}
.search-result-link{display:flex;align-items:baseline;gap:12px;padding:11px 4px;color:var(--paper);font-size:15px}
.search-result-link:hover{color:var(--cyan);background:rgba(31,227,201,.05)}
.search-result-kind{
  flex:none;min-width:46px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--gold);
}
.search-result-title{flex:1;min-width:0}
.search-result-hint{flex:none;font-family:var(--font-mono);font-size:11px;color:var(--stone)}
.search-empty{padding:16px 4px;color:var(--stone);font-size:14px}

/* ---------- 5. Footer ---------- */
.site-footer{
  margin-top:clamp(56px,8vw,112px);
  padding:clamp(36px,5vw,64px) var(--gutter) clamp(26px,3.5vw,40px);
  background:var(--ink-900);
  border-top:1px solid var(--line);
}
.footer-inner{max-width:var(--shell);margin-inline:auto}
.footer-seg{
  position:relative;
  display:grid;grid-template-columns:60px minmax(0,1fr);
  gap:clamp(12px,2vw,26px);
  padding:clamp(20px,3vw,30px) 0;
  border-bottom:1px solid var(--line-soft);
}
.footer-seg:last-child{border-bottom:0;padding-bottom:0}
.footer-marker{position:relative;display:flex;flex-direction:column;align-items:center;gap:8px;padding-top:5px}
.footer-marker::before{
  content:"";position:absolute;top:24px;bottom:-34px;left:50%;
  width:1px;background:var(--line-soft);
}
.footer-seg:last-child .footer-marker::before{display:none}
.footer-dot{
  width:10px;height:10px;border-radius:50%;
  border:1px solid var(--cyan);background:rgba(31,227,201,.18);
}
.footer-index{font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--stone)}
.footer-body{min-width:0}
.footer-title{
  font-family:var(--font-head);font-weight:800;letter-spacing:-.01em;
  font-size:clamp(1.05rem,2vw,1.35rem);margin-bottom:10px;
}
.footer-note{margin:0 0 14px;color:var(--paper-dim);font-size:15px;max-width:66ch}
.footer-links{margin-top:2px}
.footer-link-list{display:flex;flex-wrap:wrap;gap:8px 10px}
.footer-link{
  display:inline-block;padding:6px 13px;
  border:1px solid var(--line-soft);border-radius:var(--radius-pill);
  color:var(--paper-dim);font-size:13px;line-height:1.4;
  transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.footer-link:hover{color:var(--cyan);border-color:rgba(31,227,201,.45);background:rgba(31,227,201,.07)}
.footer-link[aria-current="page"]{color:var(--ink-900);background:var(--cyan);border-color:var(--cyan)}
.contact-list{display:flex;flex-wrap:wrap;gap:12px 32px;margin:0 0 14px}
.contact-row{display:flex;flex-direction:column;gap:3px;min-width:210px}
.contact-key{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--stone)}
.contact-val{font-size:17px;color:var(--paper);line-height:1.5}
.copy-btn{
  display:inline-flex;align-items:center;gap:9px;
  padding-bottom:2px;
  color:var(--paper);font-family:var(--font-mono);font-size:17px;letter-spacing:.01em;
  border-bottom:1px dashed rgba(227,178,75,.5);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.copy-btn::after{
  content:"复制";font-size:11px;letter-spacing:.06em;color:var(--gold);
  border:1px solid rgba(227,178,75,.45);border-radius:4px;padding:1px 5px;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.copy-btn:hover{color:var(--gold);border-color:var(--gold)}
.copy-btn.is-copied{color:var(--cyan);border-color:var(--cyan)}
.copy-btn.is-copied::after{content:"已复制";color:var(--cyan);border-color:rgba(31,227,201,.5)}
.footer-address{margin:0 0 14px;font-size:15px;color:var(--paper-dim);max-width:44ch;line-height:1.7}
.footer-legal{
  display:flex;flex-wrap:wrap;gap:6px 20px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;color:var(--stone);
}

/* ---------- 6. Layout utilities ---------- */
.wrap{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(40px,6vw,84px)}
.section--tight{padding-block:clamp(24px,3.5vw,48px)}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:14px;margin-bottom:clamp(20px,3vw,34px);
}
.section-title{font-size:clamp(1.75rem,3.6vw,3rem)}
.section-note{margin:0;font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--stone)}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  color:var(--gold);text-transform:uppercase;margin-bottom:10px;
}
.lead{font-size:19px;line-height:1.7;color:var(--paper-dim);max-width:66ch}
.mono{font-family:var(--font-mono);letter-spacing:.02em}
.divider{height:1px;border:0;margin:0;background:var(--line-soft)}
.stack{display:flex;flex-direction:column;gap:clamp(12px,2vw,20px)}
.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.grid-8-3{
  display:grid;grid-template-columns:minmax(0,8fr) minmax(0,3fr);
  gap:clamp(20px,3vw,44px);align-items:start;
}
.rail{position:sticky;top:calc(var(--header-offset) + 6px);padding-left:14px}
.rail::before{content:"";position:absolute;left:0;top:0;bottom:0;width:1px;background:var(--line-soft)}
.rail-title{
  margin-bottom:12px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--stone);
}
.rail-list{display:flex;flex-direction:column;gap:3px}
.rail-link{
  position:relative;display:block;
  padding:5px 0 5px 10px;
  color:var(--paper-dim);font-size:14px;line-height:1.6;
  transition:color .16s var(--ease);
}
.rail-link::before{
  content:"";position:absolute;left:-14px;top:6px;bottom:6px;
  width:2px;background:transparent;
  transition:background-color .16s var(--ease);
}
.rail-link:hover{color:var(--cyan)}
.rail-link[aria-current="true"]{color:var(--paper)}
.rail-link[aria-current="true"]::before{background:var(--cyan)}

/* ---------- 7. Components ---------- */
.breadcrumbs{margin:0 0 clamp(18px,3vw,30px)}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb-list li{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;color:var(--stone);
}
.breadcrumb-list li::after{content:"/";color:var(--line)}
.breadcrumb-list li:last-child::after{content:""}
.breadcrumb-link{color:var(--stone)}
.breadcrumb-link:hover{color:var(--cyan)}
.breadcrumb-current{color:var(--paper)}

.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.3;letter-spacing:.01em;
  transition:color .16s var(--ease),background-color .16s var(--ease),border-color .16s var(--ease);
}
.btn-primary{background:var(--cyan);color:var(--ink-900)}
.btn-primary:hover{background:var(--cyan-deep);color:var(--paper)}
.btn-ghost{border-color:var(--line);color:var(--paper)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-gold{border-color:rgba(227,178,75,.6);color:var(--gold)}
.btn-gold:hover{background:rgba(227,178,75,.13);color:var(--gold)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;line-height:1.7;
}
.tag--moss{background:var(--moss);color:var(--paper)}
.tag--clay{background:var(--clay);color:var(--paper)}
.tag--steel{background:var(--steel);color:var(--ink-900)}
.tag--cyan{background:var(--cyan-deep);color:var(--paper)}
.tag--gold{background:rgba(227,178,75,.16);border-color:rgba(227,178,75,.45);color:var(--gold)}
.tag--line{border-color:var(--line);color:var(--stone)}

.entry{
  display:flex;flex-direction:column;gap:6px;
  padding:18px 0;border-bottom:1px solid var(--line-soft);
}
.entry-time{font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;color:var(--gold)}
.entry-title{
  font-family:var(--font-head);font-weight:800;letter-spacing:-.01em;
  font-size:clamp(1.1rem,2vw,1.25rem);line-height:1.35;
}
.entry-title a{color:var(--paper)}
.entry-title a:hover{color:var(--cyan)}
.entry-summary{color:var(--paper-dim);font-size:16px;max-width:66ch}
.entry-diff{font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;color:var(--stone)}
.entry-diff strong{color:var(--cyan);font-weight:400}

.panel{
  padding:clamp(18px,2.6vw,28px);
  background:var(--ink-800);
  border:1px solid var(--line-soft);border-radius:var(--radius-panel);
  box-shadow:0 1px 0 rgba(255,255,255,.06);
}
.panel--flat{background:transparent;border-color:var(--line);box-shadow:none}
.panel-title{font-family:var(--font-head);font-weight:800;font-size:18px;margin-bottom:8px}

.v-note{
  position:absolute;left:0;top:0;
  writing-mode:vertical-rl;transform:rotate(180deg);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;
  color:var(--stone);white-space:nowrap;user-select:none;
}

.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;
  background:var(--ink-800);
  border:1px solid var(--line-soft);border-radius:var(--radius-panel);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame > img{width:100%;height:100%;object-fit:cover;filter:saturate(.86) contrast(1.06)}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(11,27,46,0) 42%,rgba(11,27,46,.58) 100%);
}
.media-frame-caption{margin-top:10px;font-family:var(--font-mono);font-size:12px;color:var(--stone)}

.texture-grid{
  background-color:var(--ink-800);
  background-image:
    linear-gradient(rgba(139,148,156,.14) 1px,transparent 1px),
    linear-gradient(90deg,rgba(139,148,156,.14) 1px,transparent 1px);
  background-size:32px 32px;
}

.surface-paper{
  padding:clamp(20px,3vw,38px);
  background:var(--paper);color:var(--ink-900);
  border-radius:var(--radius-panel);
}
.surface-paper h2,.surface-paper h3{color:var(--ink-900)}
.surface-paper p{color:rgba(11,27,46,.82);max-width:66ch}
.surface-paper a{color:var(--cyan-deep)}
.surface-paper a:hover{color:var(--ink-900)}

/* ---------- 8. Responsive ---------- */
@media (max-width:1024px){
  .grid-8-3{grid-template-columns:minmax(0,1fr)}
  .rail{position:static;padding-left:0}
  .rail::before{display:none}
  .rail-list{flex-direction:row;flex-wrap:wrap;gap:6px}
  .rail-link{
    padding:6px 12px;border:1px solid var(--line-soft);border-radius:var(--radius-pill);
    font-size:13px;
  }
  .rail-link::before{display:none}
  .rail-link[aria-current="true"]{border-color:var(--cyan);color:var(--cyan);background:rgba(31,227,201,.08)}
}

@media (max-width:960px){
  .header-inner{grid-template-columns:auto minmax(0,1fr) auto}
  .brand-status{display:none}
  .nav-toggle{display:inline-flex}
  .nav-capsule{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    display:block;padding:10px;
    border-radius:22px;
    background:rgba(11,27,46,.97);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s var(--ease);
  }
  .nav-capsule[data-open]{opacity:1;visibility:visible;transform:none}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-item{width:100%}
  .nav-link{
    width:100%;justify-content:space-between;
    padding:12px 14px;font-size:15px;
  }
  .site-header[data-scrolled] .nav-label{display:inline}
  .site-header[data-scrolled] .nav-link{padding:12px 14px}
  .nav-index{display:inline}
  .header-tools .icon-btn{
    position:fixed;right:clamp(14px,4vw,22px);bottom:clamp(14px,4vw,22px);z-index:65;
    padding:13px 20px;
    background:var(--cyan);color:var(--ink-900);
    border-color:transparent;
    box-shadow:0 14px 30px rgba(0,0,0,.45);
  }
  .header-tools .icon-btn:hover{background:var(--cyan-deep);color:var(--paper);border-color:transparent}
  .header-tools .icon-btn[aria-expanded="true"]{background:var(--cyan-deep);color:var(--paper)}
  .search-panel{top:calc(var(--header-offset) - 22px);width:calc(100vw - 28px)}
  .site-footer{padding-bottom:calc(clamp(26px,3.5vw,40px) + 66px)}
}

@media (max-width:640px){
  body{font-size:16px}
  .footer-seg{grid-template-columns:38px minmax(0,1fr);gap:12px}
  .contact-row{min-width:100%}
  .section-title{font-size:clamp(1.6rem,7vw,2.2rem)}
  .btn{width:auto}
}

/* ---------- 9. Motion preference ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .progress-bar{transition:none}
  .skip-link{transition:none}
}