/* ==========================================================================
   bsport看台 — 共享外壳样式 /assets/site.css
   结构：变量 · 基础排版 · 容器与画板 · 组件 · 头部 · 页脚 · 响应式
   ========================================================================== */

:root{
  --sand-050:#F7F2E8;
  --mist-200:#D9D2C4;
  --terra-600:#B8452B;
  --terra-900:#5E1F14;
  --jade-700:#0E5C46;
  --jade-400:#2E9C77;
  --sky-500:#2F7FBF;
  --gold-500:#C99A34;
  --ink-900:#14100D;

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --font-mono:"SFMono-Regular","JetBrains Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --rail:88px;
  --topbar-h:76px;
  --frame:3px;
  --hard-sm:4px 4px 0 var(--ink-900);
  --hard-md:10px 10px 0 rgba(20,16,13,.16);
  --hard-lg:18px 18px 0 rgba(20,16,13,.13);
  --gap-stack:clamp(24px,4vw,56px);
  --gut:clamp(16px,3vw,40px);
}

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}

body{
  margin:0;
  padding-left:var(--rail);
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-900);
  background-color:var(--sand-050);
  background-image:
    repeating-linear-gradient(0deg,rgba(20,16,13,.021) 0 1px,transparent 1px 3px),
    repeating-linear-gradient(90deg,rgba(20,16,13,.016) 0 1px,transparent 1px 4px);
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4,h5,h6{margin:0 0 .5em;line-height:1.22;font-weight:600}
h1{font-weight:300}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit}
a{color:var(--jade-700);text-decoration:none;transition:color .16s linear}
a:hover{color:var(--terra-600)}
strong{font-weight:800}
code,kbd,samp{font-family:var(--font-mono);font-size:.92em}

:focus-visible{outline:3px solid var(--gold-500);outline-offset:3px}

::selection{background:var(--gold-500);color:var(--ink-900)}

/* ---------- 2. 排版工具 ---------- */
.bs-display{
  margin:0 0 .18em;
  font-weight:200;
  font-size:clamp(2.6rem,11vw,8.5rem);
  line-height:.96;
  letter-spacing:-.02em;
}
.bs-display strong{font-weight:900;letter-spacing:-.03em}

.bs-lead{
  font-size:clamp(15px,1.4vw,18px);
  line-height:1.8;
  color:var(--jade-700);
  max-width:38em;
}

.bs-prose{max-width:36em}
.bs-prose h2,.bs-prose h3{margin-top:1.6em}

.bs-data{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}

.bs-no{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--terra-600);
  font-variant-numeric:tabular-nums;
}

.bs-kicker{
  display:block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  color:var(--jade-400);
  margin:0 0 10px;
}

.bs-rule{
  height:0;
  border:0;
  border-top:2px solid var(--mist-200);
  margin:clamp(20px,3vw,36px) 0;
}

/* ---------- 3. 容器与画板 ---------- */
.bs-wrap{
  width:100%;
  max-width:1280px;
  margin-inline:auto;
  padding-inline:var(--gut);
}

.bs-stack{
  display:grid;
  gap:var(--gap-stack);
}

.bs-panel{
  position:relative;
  background:var(--sand-050);
  border:2px solid var(--ink-900);
  box-shadow:var(--hard-md);
  padding:clamp(20px,3vw,44px);
}
.bs-panel--terra{border-color:var(--terra-600);box-shadow:14px 14px 0 rgba(184,69,43,.28)}
.bs-panel--jade{border-color:var(--jade-700);box-shadow:14px 14px 0 rgba(14,92,70,.26)}
.bs-panel--sky{border-color:var(--sky-500);box-shadow:14px 14px 0 rgba(47,127,191,.26)}
.bs-panel--dark{
  background:var(--terra-900);
  color:var(--sand-050);
  border-color:var(--ink-900);
  box-shadow:16px 16px 0 rgba(20,16,13,.3);
}
.bs-panel--dark a{color:var(--gold-500)}
.bs-panel--dark a:hover{color:var(--sand-050)}
.bs-panel--dark .bs-no{color:var(--gold-500)}

.bs-panel__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 18px;
  margin-bottom:clamp(14px,2vw,24px);
  padding-bottom:12px;
  border-bottom:2px solid var(--mist-200);
}
.bs-panel--dark .bs-panel__head{border-bottom-color:rgba(247,242,232,.28)}

/* 网格层次：主栏 / 旁注 / 延伸入口 */
.bs-grid{
  display:grid;
  grid-template-columns:repeat(16,minmax(0,1fr));
  gap:clamp(16px,2vw,28px);
}
.bs-col-main{grid-column:span 9}
.bs-col-aside{grid-column:span 3}
.bs-col-extra{grid-column:span 4}

/* ---------- 4. 组件 ---------- */
.bs-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 18px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  line-height:1.2;
  color:var(--ink-900);
  background:var(--sand-050);
  border:2px solid var(--ink-900);
  box-shadow:var(--hard-sm);
  cursor:pointer;
  transition:transform .16s linear,box-shadow .16s linear,background-color .16s linear,color .16s linear;
}
.bs-btn:hover{color:var(--ink-900);transform:translate(2px,2px);box-shadow:2px 2px 0 var(--ink-900)}
.bs-btn:active{transform:translate(4px,4px);box-shadow:0 0 0 var(--ink-900)}

.bs-btn--primary{
  background:var(--terra-600);
  color:var(--sand-050);
  border-color:var(--ink-900);
}
.bs-btn--primary:hover{background:var(--terra-900);color:var(--sand-050)}

.bs-btn--ghost{
  background:transparent;
  color:var(--jade-700);
  border-color:var(--jade-700);
  box-shadow:4px 4px 0 rgba(14,92,70,.35);
}
.bs-btn--ghost:hover{color:var(--sand-050);background:var(--jade-700);box-shadow:2px 2px 0 var(--ink-900)}

.bs-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  line-height:1.6;
  color:var(--ink-900);
  background:var(--gold-500);
  border:2px solid var(--ink-900);
}
.bs-tag--jade{background:var(--jade-400);color:var(--ink-900)}
.bs-tag--sky{background:var(--sky-500);color:var(--sand-050)}
.bs-tag--terra{background:var(--terra-600);color:var(--sand-050)}
.bs-tag--gold{background:var(--gold-500)}

.bs-crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0;
  margin:0 0 clamp(16px,2vw,26px);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
}
.bs-crumb li{display:flex;align-items:center;color:var(--jade-700)}
.bs-crumb li+li::before{content:"/";margin:0 12px;color:var(--mist-200)}
.bs-crumb a{color:var(--jade-700);border-bottom:2px solid transparent}
.bs-crumb a:hover{border-bottom-color:var(--terra-600)}
.bs-crumb [aria-current="page"]{color:var(--terra-600)}

.bs-media{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/9;
  background:var(--mist-200);
  border:2px solid var(--ink-900);
  box-shadow:var(--hard-md);
}
.bs-media>img{width:100%;height:100%;object-fit:cover}
.bs-media--tall{aspect-ratio:4/5}
.bs-media--square{aspect-ratio:1/1}
.bs-media--wide{aspect-ratio:21/9}
.bs-media[data-placeholder]::after{
  content:attr(data-placeholder);
  position:absolute;
  left:0;right:0;bottom:0;
  padding:8px 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--sand-050);
  background:rgba(20,16,13,.86);
}

.bs-table{
  width:100%;
  border-collapse:collapse;
  font-family:var(--font-mono);
  font-size:13px;
  font-variant-numeric:tabular-nums;
}
.bs-table caption{
  text-align:left;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--jade-700);
  padding-bottom:10px;
}
.bs-table th{
  background:var(--jade-700);
  color:var(--sand-050);
  text-align:left;
  font-weight:600;
  letter-spacing:.06em;
  padding:11px 12px;
  border:1px solid var(--jade-700);
}
.bs-table td{
  padding:11px 12px;
  border-bottom:1px solid var(--mist-200);
}
.bs-table tbody tr:nth-child(even){background:rgba(217,210,196,.34)}
.bs-table tbody tr:hover{background:rgba(201,154,52,.16)}

.bs-tabs{
  border:2px solid var(--ink-900);
  background:var(--sand-050);
  box-shadow:var(--hard-md);
}
.bs-tabs__list{
  display:flex;
  flex-wrap:wrap;
  background:var(--mist-200);
  border-bottom:3px solid var(--ink-900);
}
.bs-tabs__tab{
  appearance:none;
  border:0;
  border-right:2px solid var(--ink-900);
  background:transparent;
  padding:12px 20px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--ink-900);
  cursor:pointer;
  transition:background-color .16s linear,color .16s linear;
}
.bs-tabs__tab:hover{background:rgba(247,242,232,.6)}
.bs-tabs__tab[aria-selected="true"]{background:var(--jade-700);color:var(--sand-050)}
.bs-tabs__panel{padding:clamp(16px,2.5vw,30px);transition:opacity .18s linear}
.bs-tabs__panel[hidden]{display:none}
.bs-tabs__panel:focus-visible{outline:3px solid var(--gold-500);outline-offset:-3px}

[data-reveal]{
  opacity:0;
  transform:translateY(26px);
  transition:opacity .32s linear,transform .32s cubic-bezier(.22,.61,.36,1);
}
[data-reveal][data-visible]{opacity:1;transform:none}

/* ---------- 5. 头部与画框导航 ---------- */
.bs-skip{
  position:fixed;
  top:-80px;
  left:calc(var(--rail) + 12px);
  z-index:200;
  padding:10px 18px;
  font-size:14px;
  font-weight:700;
  color:var(--sand-050);
  background:var(--ink-900);
  border:2px solid var(--gold-500);
  transition:top .16s linear;
}
.bs-skip:focus{top:12px;color:var(--sand-050)}

.bs-header{
  position:sticky;
  top:0;
  z-index:70;
}

.bs-topbar{
  background:var(--sand-050);
  border-bottom:var(--frame) solid var(--ink-900);
  box-shadow:0 8px 0 rgba(20,16,13,.1);
}
.bs-topbar__inner{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,28px);
  min-height:var(--topbar-h);
  padding:9px var(--gut);
}

.bs-brand{
  display:flex;
  align-items:center;
  gap:12px;
  margin-right:auto;
  color:inherit;
}
.bs-brand:hover{color:inherit}
.bs-brand__mark{
  flex:none;
  width:42px;
  height:42px;
  display:grid;
  place-items:center;
  font-family:var(--font-mono);
  font-size:18px;
  font-weight:700;
  color:var(--sand-050);
  background:var(--jade-700);
  border:2px solid var(--ink-900);
  box-shadow:4px 4px 0 var(--terra-600);
}
.bs-brand__text{display:block;min-width:0}
.bs-brand__name{
  display:block;
  font-size:19px;
  font-weight:800;
  line-height:1.14;
  letter-spacing:.01em;
}
.bs-brand__tag{
  display:block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--jade-700);
}

.bs-topnav__list{display:flex;gap:20px}
.bs-topnav__link{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--jade-700);
  border-bottom:2px solid transparent;
  padding-bottom:2px;
}
.bs-topnav__link:hover{color:var(--terra-600);border-bottom-color:var(--terra-600)}
.bs-topnav__link[aria-current="page"]{color:var(--ink-900);border-bottom-color:var(--ink-900)}

.bs-topbar__actions{display:flex;align-items:center;gap:10px}

.bs-nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 14px;
  font-size:14px;
  font-weight:700;
  color:var(--sand-050);
  background:var(--ink-900);
  border:2px solid var(--ink-900);
  box-shadow:4px 4px 0 var(--gold-500);
  cursor:pointer;
  transition:transform .16s linear,box-shadow .16s linear;
}
.bs-nav-toggle:hover{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--gold-500)}
.bs-nav-toggle__bars{position:relative;width:18px;height:12px}
.bs-nav-toggle__bars::before,
.bs-nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;right:0;
  height:2px;
  background:currentColor;
}
.bs-nav-toggle__bars::before{top:1px}
.bs-nav-toggle__bars::after{bottom:1px}
.bs-nav-toggle[aria-expanded="true"]{
  background:var(--terra-600);
  transform:translate(3px,3px);
  box-shadow:0 0 0 var(--gold-500);
}

.bs-progress{height:4px;background:var(--mist-200)}
.bs-progress__bar{
  display:block;
  width:0;
  height:4px;
  background:linear-gradient(90deg,var(--jade-700) 0%,var(--jade-400) 38%,var(--sky-500) 68%,var(--terra-600) 100%);
  transition:width .1s linear;
}

/* 画框导航 */
.bs-nav{
  background:var(--terra-900);
  color:var(--sand-050);
  border-right:var(--frame) solid var(--ink-900);
}

.bs-nav__label{
  margin:0;
  padding:0 0 12px;
  align-self:center;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.24em;
  color:var(--gold-500);
  border-bottom:2px solid rgba(247,242,232,.22);
}

.bs-nav__list{display:flex;flex-direction:column;gap:2px}

.bs-nav__link{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:7px;
  padding:13px 4px;
  color:var(--sand-050);
  border-left:4px solid transparent;
  transition:background-color .16s linear,color .16s linear,border-color .16s linear;
}
.bs-nav__link:hover{color:var(--gold-500);background:rgba(247,242,232,.1)}
.bs-nav__num{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
  color:var(--gold-500);
}
.bs-nav__name{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-size:12.5px;
  letter-spacing:.18em;
  line-height:1.2;
}
.bs-nav__link[aria-current="page"]{
  color:var(--terra-900);
  background:var(--sand-050);
  border-left-color:var(--gold-500);
}
.bs-nav__link[aria-current="page"] .bs-nav__num{color:var(--terra-600)}
.bs-nav__link:focus-visible{outline:3px solid var(--gold-500);outline-offset:-3px}

.bs-nav__foot{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:6px;
  margin-top:auto;
  padding-top:16px;
}
.bs-nav__dot{width:14px;height:14px;border:2px solid rgba(247,242,232,.55)}
.bs-nav__dot--terra{background:var(--terra-600)}
.bs-nav__dot--jade{background:var(--jade-400)}
.bs-nav__dot--sky{background:var(--sky-500)}
.bs-nav__dot--gold{background:var(--gold-500)}

/* ---------- 6. 页脚 ---------- */
.bs-footer{
  margin-top:clamp(48px,8vw,112px);
  color:var(--sand-050);
  background:var(--terra-900);
  border-top:6px solid var(--gold-500);
}

.bs-footer__inner{
  max-width:1280px;
  margin-inline:auto;
  padding:clamp(36px,5vw,64px) var(--gut) clamp(28px,4vw,48px);
  display:grid;
  grid-template-columns:1fr 1.9fr 1.3fr;
  gap:clamp(24px,4vw,56px);
}

.bs-footer__brandmark{
  margin:0;
  font-size:26px;
  font-weight:800;
  line-height:1.2;
}
.bs-footer__brandline{
  margin:8px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--jade-400);
}
.bs-footer__swatches{display:flex;gap:8px;margin:18px 0 0}
.bs-footer__swatch{width:26px;height:10px;border:2px solid rgba(20,16,13,.7)}
.bs-footer__swatch--terra{background:var(--terra-600)}
.bs-footer__swatch--jade{background:var(--jade-400)}
.bs-footer__swatch--sky{background:var(--sky-500)}
.bs-footer__swatch--gold{background:var(--gold-500)}
.bs-footer__year{
  margin:16px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:rgba(247,242,232,.7);
}

.bs-footer__cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2vw,32px);
}
.bs-footer__col{
  padding-top:14px;
  border-top:3px solid var(--terra-600);
}
.bs-footer__col:nth-child(2){border-top-color:var(--jade-400)}
.bs-footer__col:nth-child(3){border-top-color:var(--sky-500)}
.bs-footer__title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--gold-500);
}
.bs-footer__list{display:grid;gap:11px}
.bs-footer__link{
  display:inline-block;
  font-size:14px;
  color:var(--sand-050);
  border-bottom:1px solid rgba(247,242,232,.36);
  padding-bottom:2px;
}
.bs-footer__link:hover{color:var(--gold-500);border-bottom-color:var(--gold-500)}
.bs-footer__link[aria-current="page"]{color:var(--gold-500);border-bottom-color:var(--gold-500)}

.bs-footer__contact{
  padding:18px;
  background:rgba(247,242,232,.06);
  border:2px solid rgba(247,242,232,.34);
}
.bs-footer__contact-title{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--gold-500);
}
.bs-footer__contact-row{
  display:grid;
  grid-template-columns:52px minmax(0,1fr);
  gap:10px;
  margin:0;
  padding:8px 0;
  font-size:13px;
  border-bottom:1px dashed rgba(247,242,232,.22);
}
.bs-footer__contact-row:last-of-type{border-bottom:0}
.bs-footer__contact-key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--jade-400);
}
.bs-footer__contact-val{
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.7;
  word-break:break-word;
}
.bs-footer__note{
  margin:12px 0 0;
  font-size:12px;
  line-height:1.7;
  color:rgba(247,242,232,.66);
}

.bs-footer__base{background:var(--ink-900);border-top:2px solid rgba(247,242,232,.18)}
.bs-footer__base-inner{
  max-width:1280px;
  margin-inline:auto;
  padding:16px var(--gut);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 28px;
}
.bs-footer__legal{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--gold-500);
}
.bs-footer__disclaimer{
  margin:0;
  font-size:12px;
  color:rgba(247,242,232,.72);
}

.bs-totop{
  padding:8px 16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--sand-050);
  background:transparent;
  border:2px solid rgba(247,242,232,.5);
  cursor:pointer;
  transition:background-color .16s linear,color .16s linear,border-color .16s linear;
}
.bs-totop:hover{background:var(--gold-500);color:var(--ink-900);border-color:var(--gold-500)}

/* ---------- 7. 响应式 ---------- */
@media (max-width:1080px){
  :root{--rail:0px;--topbar-h:66px}

  body{padding-left:0}

  .bs-skip{left:12px}

  .bs-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    max-height:0;
    padding:0 var(--gut);
    overflow:hidden;
    opacity:0;
    visibility:hidden;
    border-right:0;
    border-bottom:var(--frame) solid var(--ink-900);
    box-shadow:0 14px 0 rgba(20,16,13,.14);
    transition:max-height .32s linear,opacity .18s linear,padding .18s linear,visibility .18s linear;
  }
  .bs-nav[data-open]{
    max-height:min(76vh,640px);
    padding:16px var(--gut) 22px;
    overflow-y:auto;
    opacity:1;
    visibility:visible;
  }

  .bs-nav__label{
    align-self:stretch;
    padding:0 0 10px;
    writing-mode:horizontal-tb;
    border-bottom:2px solid rgba(247,242,232,.22);
  }
  .bs-nav__list{flex-direction:row;flex-wrap:wrap;gap:8px}
  .bs-nav__link{
    flex-direction:row;
    align-items:baseline;
    gap:8px;
    padding:8px 13px;
    color:var(--sand-050);
    border:2px solid var(--sand-050);
    box-shadow:3px 3px 0 rgba(20,16,13,.4);
  }
  .bs-nav__link:hover{color:var(--gold-500);background:rgba(247,242,232,.1)}
  .bs-nav__name{writing-mode:horizontal-tb;font-size:14px;letter-spacing:.06em}
  .bs-nav__link[aria-current="page"]{
    color:var(--ink-900);
    background:var(--gold-500);
    border-color:var(--ink-900);
  }
  .bs-nav__link[aria-current="page"] .bs-nav__num{color:var(--terra-900)}
  .bs-nav__foot{display:none}
}

@media (max-width:900px){
  .bs-topnav{display:none}
  .bs-btn--ghost{display:none}
  .bs-nav-toggle{display:inline-flex}
  .bs-footer__inner{grid-template-columns:1fr;gap:32px}
}

@media (min-width:901px) and (max-width:1080px){
  .bs-nav-toggle{display:inline-flex}
}

@media (max-width:1080px){
  .bs-col-main,.bs-col-aside,.bs-col-extra{grid-column:1 / -1}
}

@media (max-width:760px){
  .bs-footer__cols{grid-template-columns:1fr;gap:24px}
  .bs-grid{gap:16px}
  .bs-panel{padding:18px;box-shadow:8px 8px 0 rgba(20,16,13,.16)}
}

@media (max-width:560px){
  body{font-size:15.5px;line-height:1.8}
  .bs-brand__tag{display:none}
  .bs-brand__mark{width:38px;height:38px;font-size:16px;box-shadow:3px 3px 0 var(--terra-600)}
  .bs-brand__name{font-size:17px}
  .bs-topbar__inner{gap:10px;padding:8px 16px}
  .bs-btn{padding:9px 14px;font-size:13px;box-shadow:3px 3px 0 var(--ink-900)}
  .bs-tabs__tab{flex:1 1 auto;padding:11px 14px;border-right:0;border-bottom:2px solid var(--ink-900)}
  .bs-table{font-size:12px}
  .bs-table th,.bs-table td{padding:9px 10px}
  .bs-footer__contact-row{grid-template-columns:1fr;gap:2px}
  .bs-footer__base-inner{justify-content:flex-start}
}

/* ---------- 8. 动效与无障碍降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .bs-btn:hover,.bs-btn:active,.bs-nav-toggle:hover,.bs-nav-toggle[aria-expanded="true"]{transform:none}
}