/* BSPORTS看台 — 共享外壳样式 /assets/site.css */

:root{
  --deep:#0F3B2E;
  --charcoal:#14181A;
  --moss:#2F6B4F;
  --paper:#F3F1E9;
  --stone:#6E7A76;
  --clay:#B4623C;
  --signal:#C8FF3D;
  --alert:#8E2B2B;
  --glass:rgba(255,255,255,0.08);
  --lime-soft:#E9F5C9;
  --ink-soft:#2B3130;
  --hair:rgba(20,24,26,0.14);
  --hair-light:rgba(243,241,233,0.16);
  --rail-w:264px;
  --bar-h:64px;
  --shell:1140px;
  --measure:38em;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(0.2,0.8,0.2,1);
}

@media (min-width:1024px){ :root{ --bar-h:72px; } }

*,*::before,*::after{ box-sizing:border-box; }

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

body{
  margin:0;
  padding-top:var(--bar-h);
  font-family:var(--font-sans);
  font-weight:400;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-soft);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

body[data-nav-locked]{ overflow:hidden; }

@media (min-width:1024px){
  body{ padding-left:var(--rail-w); }
}

img,svg,video{ max-width:100%; display:block; }

a{ color:inherit; text-decoration:none; }

ul,ol{ margin:0; padding:0; list-style:none; }

button{ font:inherit; color:inherit; background:none; border:0; padding:0; cursor:pointer; }

address{ font-style:normal; }

h1,h2,h3,h4,h5,h6{
  margin:0;
  font-weight:900;
  line-height:1.2;
  letter-spacing:-0.01em;
  color:var(--charcoal);
}
h1{ font-size:clamp(34px,5.6vw,64px); }
h2{ font-size:clamp(25px,3.6vw,40px); }
h3{ font-size:clamp(19px,2.2vw,24px); }
h4{ font-size:17px; font-weight:700; }

p{ margin:0 0 1.1em; }
p:last-child{ margin-bottom:0; }

:focus-visible{
  outline:2px solid var(--signal);
  outline-offset:3px;
  border-radius:2px;
}

#main-content{
  display:block;
  scroll-margin-top:calc(var(--bar-h) + 16px);
  min-height:40vh;
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  padding:10px 18px;
  background:var(--signal);
  color:var(--charcoal);
  font-size:14px;
  font-weight:700;
  border-radius:2px;
  transform:translateY(-200%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{ transform:translateY(0); }

/* ---------- 顶栏 ---------- */
.masthead{
  position:fixed;
  top:0; left:0; right:0;
  height:var(--bar-h);
  z-index:60;
  display:flex;
  align-items:stretch;
  justify-content:space-between;
  background:var(--charcoal);
  color:var(--paper);
  border-bottom:1px solid var(--hair-light);
}

.masthead__brand{
  display:flex;
  align-items:center;
  gap:14px;
  min-width:0;
  padding:0 16px;
  background:var(--deep);
}
@media (min-width:1024px){
  .masthead__brand{ width:var(--rail-w); flex:0 0 var(--rail-w); padding:0 22px; }
}

.brandmark{
  display:flex;
  flex-direction:column;
  justify-content:center;
  min-width:0;
  line-height:1.12;
}
.brandmark__name{
  font-size:17px;
  font-weight:900;
  letter-spacing:0.01em;
  color:var(--paper);
  white-space:nowrap;
}
.brandmark__sub{
  font-size:10.5px;
  font-weight:500;
  letter-spacing:0.16em;
  color:rgba(243,241,233,0.55);
  white-space:nowrap;
}

.season-strip{
  display:none;
  align-items:center;
  gap:9px;
  margin:0;
  padding-left:16px;
  border-left:1px solid var(--hair-light);
}
@media (min-width:768px){ .season-strip{ display:flex; } }

.season-strip__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--signal);
  box-shadow:0 0 0 3px rgba(200,255,61,0.18);
  flex:0 0 auto;
}
.season-strip__text{
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:0.05em;
  color:var(--lime-soft);
  white-space:nowrap;
}

.masthead__actions{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:0 16px;
}
@media (min-width:1024px){
  .masthead__actions{ gap:16px; padding:0 28px; }
}
@media (max-width:479px){
  .masthead__cta{ display:none; }
}

.masthead__meter{
  position:absolute;
  left:0; right:0; bottom:0;
  height:2px;
  background:var(--signal);
  transform:scaleX(var(--scroll-progress,0));
  transform-origin:0 50%;
}

/* ---------- 侧边轨道导航 ---------- */
.rail{
  position:fixed;
  top:0; left:0; bottom:0;
  z-index:80;
  width:min(300px,84vw);
  display:flex;
  flex-direction:column;
  padding:20px 16px 26px;
  background:var(--deep);
  color:var(--paper);
  border-right:1px solid var(--hair-light);
  overflow-y:auto;
  transform:translateX(-101%);
  transition:transform .22s var(--ease);
}
.rail[data-open]{ transform:translateX(0); }

@media (min-width:1024px){
  .rail{
    top:var(--bar-h);
    width:var(--rail-w);
    transform:none;
    transition:none;
    padding:26px 16px 28px;
  }
  .rail__close{ display:none; }
}

.rail-scrim{
  position:fixed;
  inset:0;
  z-index:70;
  background:rgba(20,24,26,0.62);
  opacity:0;
  pointer-events:none;
  transition:opacity .22s var(--ease);
}
.rail-scrim[data-open]{ opacity:1; pointer-events:auto; }
@media (min-width:1024px){ .rail-scrim{ display:none; } }

.rail__top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:0 8px 18px;
}

.rail__eyebrow{
  margin:0;
  font-size:11px;
  font-weight:600;
  letter-spacing:0.28em;
  color:rgba(243,241,233,0.48);
}

.rail__close{
  width:34px;
  height:34px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:20px;
  line-height:1;
  color:var(--paper);
  border:1px solid var(--hair-light);
  border-radius:2px;
}
.rail__close:hover{ border-color:var(--signal); color:var(--signal); }

.rail__list{
  flex:1 1 auto;
  margin-bottom:22px;
}

.rail__item + .rail__item{ margin-top:2px; }

.rail__link{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:11px 12px;
  border-left:2px solid transparent;
  color:rgba(243,241,233,0.72);
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.rail__link:hover{
  color:var(--paper);
  background:rgba(255,255,255,0.07);
  border-left-color:var(--signal);
}
.rail__link[aria-current="page"]{
  color:var(--signal);
  background:rgba(200,255,61,0.09);
  border-left-color:var(--signal);
}

.rail__num{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:0.06em;
  color:var(--stone);
  flex:0 0 auto;
}
.rail__link[aria-current="page"] .rail__num{ color:var(--signal); }

.rail__label{
  font-size:15px;
  font-weight:500;
  letter-spacing:0.02em;
}

.rail__foot{
  margin-top:auto;
  padding-top:20px;
  border-top:1px solid var(--hair-light);
}

.rail__note{
  margin:0 0 14px;
  font-size:12px;
  line-height:1.7;
  letter-spacing:0.06em;
  color:rgba(243,241,233,0.5);
}

.rail__cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 16px;
  font-size:13px;
  font-weight:700;
  letter-spacing:0.04em;
  background:var(--signal);
  color:var(--charcoal);
  border-radius:2px;
  transition:background-color .18s var(--ease),transform .18s var(--ease);
}
.rail__cta:hover{ background:var(--lime-soft); transform:translateY(-2px); }

/* ---------- 移动导航按钮 ---------- */
.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:9px 14px;
  font-size:13px;
  font-weight:600;
  letter-spacing:0.08em;
  color:var(--paper);
  border:1px solid rgba(243,241,233,0.28);
  border-radius:2px;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{ border-color:var(--signal); color:var(--signal); }
@media (min-width:1024px){ .nav-toggle{ display:none; } }

.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:1px;
  background:currentColor;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:1px;
  background:currentColor;
}
.nav-toggle__bars::before{ top:-5px; }
.nav-toggle__bars::after{ top:5px; }

.nav-toggle__text{ line-height:1; }

/* ---------- 页脚 ---------- */
.site-foot{
  background:var(--deep);
  color:rgba(243,241,233,0.78);
}

.site-foot__inner{
  max-width:var(--shell);
  margin:0 auto;
  padding:56px 22px 36px;
  display:grid;
  grid-template-columns:1fr;
  gap:34px;
}
@media (min-width:768px){
  .site-foot__inner{ grid-template-columns:repeat(2,1fr); padding:64px 32px 40px; gap:38px; }
}
@media (min-width:1024px){
  .site-foot__inner{ grid-template-columns:repeat(4,1fr); padding:76px 44px 48px; gap:46px; }
}

.site-foot__brand{
  grid-column:1 / -1;
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 26px;
  padding-bottom:26px;
  border-bottom:1px solid var(--hair-light);
}
.site-foot__logo{
  font-size:24px;
  font-weight:900;
  letter-spacing:-0.01em;
  color:var(--paper);
}
.site-foot__tagline{
  margin:0;
  font-size:13px;
  letter-spacing:0.06em;
  color:rgba(243,241,233,0.58);
}

.site-foot__head{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:0.2em;
  color:var(--signal);
}

.site-foot__list li + li{ margin-top:10px; }

.site-foot__list a{
  font-size:14px;
  color:rgba(243,241,233,0.76);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.site-foot__list a:hover{
  color:var(--signal);
  border-bottom-color:var(--signal);
}

.site-foot__address{
  display:block;
  margin-top:18px;
  font-size:13px;
  line-height:1.9;
  color:rgba(243,241,233,0.6);
}
.site-foot__address span{ display:block; word-break:break-word; }
.site-foot__address span:first-child{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:0.03em;
}

.site-foot__hint{
  margin:14px 0 0;
  font-size:12px;
  line-height:1.7;
  color:rgba(243,241,233,0.45);
}

.site-foot__base{
  max-width:var(--shell);
  margin:0 auto;
  padding:18px 22px 28px;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 24px;
  border-top:1px solid var(--hair-light);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.04em;
  color:rgba(243,241,233,0.5);
}
@media (min-width:768px){ .site-foot__base{ padding:20px 32px 32px; } }
@media (min-width:1024px){ .site-foot__base{ padding:22px 44px 34px; } }
.site-foot__base p{ margin:0; }

/* ---------- 容器与分区 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 22px;
}
@media (min-width:768px){ .shell{ padding:0 32px; } }
@media (min-width:1024px){ .shell{ padding:0 44px; } }

.band{ padding:56px 0; }
@media (min-width:1024px){ .band{ padding:86px 0; } }

.band--paper{ background:var(--paper); color:var(--ink-soft); }
.band--deep{ background:var(--deep); color:rgba(243,241,233,0.82); }
.band--charcoal{ background:var(--charcoal); color:rgba(243,241,233,0.82); }
.band--moss{ background:var(--moss); color:rgba(243,241,233,0.9); }

.band--deep h1,.band--deep h2,.band--deep h3,.band--deep h4,
.band--charcoal h1,.band--charcoal h2,.band--charcoal h3,.band--charcoal h4,
.band--moss h1,.band--moss h2,.band--moss h3,.band--moss h4{
  color:var(--paper);
}
.band--deep .lead,.band--charcoal .lead,.band--moss .lead,
.band--deep .prose,.band--charcoal .prose,.band--moss .prose{
  color:rgba(243,241,233,0.8);
}
.band--deep .annot,.band--charcoal .annot,.band--moss .annot{
  color:rgba(243,241,233,0.55);
}

.rule{
  height:1px;
  border:0;
  margin:0;
  background:var(--hair);
}
.band--deep .rule,.band--charcoal .rule,.band--moss .rule,.site-foot .rule{
  background:var(--hair-light);
}

/* ---------- 网格 ---------- */
.grid{ display:grid; grid-template-columns:1fr; gap:26px; }
@media (min-width:900px){
  .grid{ gap:32px; }
  .grid--7-5{ grid-template-columns:7fr 5fr; }
  .grid--8-4{ grid-template-columns:8fr 4fr; }
  .grid--halves{ grid-template-columns:1fr 1fr; }
  .grid--thirds{ grid-template-columns:repeat(3,1fr); }
}

/* ---------- 文本建筑组件 ---------- */
.chapter-num{
  display:block;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(56px,11vw,132px);
  line-height:0.85;
  letter-spacing:-0.04em;
  color:transparent;
  -webkit-text-stroke:1px rgba(20,24,26,0.34);
}
.band--deep .chapter-num,
.band--charcoal .chapter-num,
.band--moss .chapter-num{
  -webkit-text-stroke-color:rgba(243,241,233,0.34);
}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  font-weight:600;
  letter-spacing:0.2em;
  color:var(--stone);
}
.kicker::before{
  content:"";
  display:block;
  width:24px;
  height:1px;
  background:var(--signal);
}
.band--deep .kicker,.band--charcoal .kicker,.band--moss .kicker{
  color:rgba(243,241,233,0.6);
}

.lead{
  max-width:34em;
  font-size:clamp(17px,2vw,21px);
  line-height:1.75;
  color:var(--ink-soft);
}

.annot{
  font-size:12.5px;
  font-weight:500;
  letter-spacing:0.12em;
  color:var(--stone);
}
.annot--vertical{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  letter-spacing:0.24em;
}

.prose{
  max-width:var(--measure);
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink-soft);
}
.prose h2{ margin:1.8em 0 .6em; font-size:clamp(22px,3vw,30px); }
.prose h3{ margin:1.5em 0 .5em; }
.prose h2:first-child,.prose h3:first-child{ margin-top:0; }
.prose p{ margin:0 0 1.2em; }
.prose ul{ list-style:none; padding-left:0; margin:0 0 1.3em; }
.prose ul li{ position:relative; padding-left:1.2em; margin-bottom:.5em; }
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.78em;
  width:9px;
  height:1px;
  background:var(--signal);
}
.prose ol{ list-style:none; counter-reset:prose; padding-left:0; margin:0 0 1.3em; }
.prose ol li{
  position:relative;
  counter-increment:prose;
  padding-left:2.4em;
  margin-bottom:.55em;
}
.prose ol li::before{
  content:counter(prose,decimal-leading-zero);
  position:absolute;
  left:0;
  top:.1em;
  font-family:var(--font-mono);
  font-size:12.5px;
  font-weight:600;
  color:var(--clay);
}
.prose strong{ font-weight:700; color:var(--charcoal); }
.prose em{
  font-style:italic;
  font-weight:600;
  border-bottom:1px solid var(--signal);
}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:12px 20px;
  margin-bottom:26px;
}

.link-underline{
  font-weight:600;
  color:var(--deep);
  border-bottom:1px solid var(--signal);
  padding-bottom:1px;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.link-underline:hover{ color:var(--moss); background:rgba(200,255,61,0.22); }
.band--deep .link-underline,.band--charcoal .link-underline{
  color:var(--signal);
  border-bottom-color:rgba(200,255,61,0.5);
}
.band--deep .link-underline:hover,.band--charcoal .link-underline:hover{
  background:rgba(200,255,61,0.16);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 20px;
  font-size:14px;
  font-weight:600;
  letter-spacing:0.04em;
  border:1px solid transparent;
  border-radius:2px;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{ transform:translateY(-2px); }

.btn--signal{ background:var(--signal); color:var(--charcoal); border-color:var(--signal); }
.btn--signal:hover{ background:var(--lime-soft); }

.btn--solid{ background:var(--deep); color:var(--paper); border-color:var(--deep); }
.btn--solid:hover{ background:var(--moss); border-color:var(--moss); }

.btn--ghost{ background:transparent; color:var(--paper); border-color:rgba(243,241,233,0.3); }
.btn--ghost:hover{ border-color:var(--signal); color:var(--signal); }

.btn--outline{ background:transparent; color:var(--deep); border-color:var(--deep); }
.btn--outline:hover{ background:var(--deep); color:var(--paper); }

.btn--alert{ background:var(--alert); color:var(--paper); border-color:var(--alert); }
.btn--alert:hover{ background:#A33535; border-color:#A33535; }

/* ---------- 面包屑 ---------- */
.breadcrumb{
  font-size:12.5px;
  letter-spacing:0.06em;
  color:var(--stone);
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumb li{ display:flex; align-items:center; gap:8px; }
.breadcrumb li + li::before{
  content:"/";
  color:rgba(110,122,118,0.6);
}
.breadcrumb a:hover{
  color:var(--deep);
  text-decoration:underline;
  text-decoration-color:var(--signal);
  text-underline-offset:3px;
}
.breadcrumb [aria-current="page"]{ color:var(--charcoal); font-weight:600; }
.band--deep .breadcrumb,.band--charcoal .breadcrumb{ color:rgba(243,241,233,0.6); }
.band--deep .breadcrumb [aria-current="page"],
.band--charcoal .breadcrumb [aria-current="page"]{ color:var(--paper); }

/* ---------- 数据组件 ---------- */
.stat{
  display:flex;
  flex-direction:column;
  gap:6px;
}
.stat__value{
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(28px,4vw,44px);
  line-height:1;
  letter-spacing:-0.02em;
  color:var(--deep);
  font-variant-numeric:tabular-nums;
}
.stat__unit{
  font-size:0.46em;
  font-weight:600;
  letter-spacing:0.04em;
  color:var(--stone);
  margin-left:5px;
}
.stat__label{
  font-size:12px;
  font-weight:500;
  letter-spacing:0.1em;
  color:var(--stone);
}
.band--deep .stat__value,.band--charcoal .stat__value{ color:var(--signal); }
.band--deep .stat__label,.band--charcoal .stat__label{ color:rgba(243,241,233,0.55); }
.band--deep .stat__unit,.band--charcoal .stat__unit{ color:var(--lime-soft); }

.data-table{
  width:100%;
  border-collapse:collapse;
  font-size:14px;
  background:transparent;
}
.data-table caption{
  caption-side:top;
  text-align:left;
  padding:0 0 12px;
  font-size:12px;
  letter-spacing:0.1em;
  color:var(--stone);
}
.data-table th,
.data-table td{
  padding:11px 14px;
  text-align:left;
  border-bottom:1px solid var(--hair);
  white-space:nowrap;
}
.data-table thead th{
  background:var(--charcoal);
  color:var(--paper);
  font-size:12px;
  font-weight:600;
  letter-spacing:0.08em;
  border-bottom:0;
}
.data-table th[data-sort]{ cursor:pointer; }
.data-table th[data-sort] button{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font:inherit;
  color:inherit;
  letter-spacing:inherit;
}
.data-table th[aria-sort="ascending"] button::after{ content:"↑"; color:var(--signal); }
.data-table th[aria-sort="descending"] button::after{ content:"↓"; color:var(--signal); }
.data-table td.num,.data-table th.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:600;
  letter-spacing:-0.01em;
}
.data-table tbody tr{ transition:background-color .16s var(--ease); }
.data-table tbody tr:hover{ background:rgba(200,255,61,0.16); }
.data-table tbody td{ color:var(--ink-soft); }
.band--deep .data-table td,.band--charcoal .data-table td{
  color:rgba(243,241,233,0.78);
  border-bottom-color:var(--hair-light);
}
.data-table td.is-alert{
  background:var(--alert);
  color:var(--paper);
}

.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:0.08em;
  border:1px solid rgba(20,24,26,0.2);
  border-radius:2px;
  color:var(--charcoal);
}
.chip--signal{ background:var(--signal); border-color:var(--signal); color:var(--charcoal); }
.chip--alert{ background:var(--alert); border-color:var(--alert); color:var(--paper); }
.chip--quiet{ border-color:var(--hair); color:var(--stone); }
.band--deep .chip,.band--charcoal .chip{ border-color:var(--hair-light); color:rgba(243,241,233,0.8); }

/* ---------- 玻璃层与图片容器 ---------- */
.glass{
  background:var(--glass);
  border:1px solid rgba(243,241,233,0.16);
  padding:22px;
  border-radius:2px;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}

.media-frame{
  position:relative;
  overflow:hidden;
  border-radius:2px;
  background:linear-gradient(140deg,var(--charcoal) 0%,var(--moss) 100%);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{ aspect-ratio:16 / 9; }
.media-frame--tall{ aspect-ratio:3 / 4; }
.media-frame--square{ aspect-ratio:1 / 1; }
.media-frame--veil::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(15,59,46,0) 42%,rgba(15,59,46,0.72) 100%);
}
.media-frame__caption{
  margin-top:10px;
  font-size:12px;
  letter-spacing:0.08em;
  color:var(--stone);
}

/* ---------- 标签页 ---------- */
.tabs__list{
  display:flex;
  flex-wrap:wrap;
  gap:4px;
  border-bottom:1px solid var(--hair);
}
.tabs__tab{
  padding:12px 18px;
  margin-bottom:-1px;
  font-size:14px;
  font-weight:600;
  letter-spacing:0.02em;
  color:var(--stone);
  border-bottom:2px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.tabs__tab:hover{ color:var(--deep); }
.tabs__tab[aria-selected="true"]{
  color:var(--deep);
  border-bottom-color:var(--signal);
}
.tabs__panel{ padding-top:24px; }
.tabs__panel[hidden]{ display:none; }

.tabs--dark .tabs__list{ border-bottom-color:var(--hair-light); }
.tabs--dark .tabs__tab{ color:rgba(243,241,233,0.58); }
.tabs--dark .tabs__tab:hover{ color:var(--paper); }
.tabs--dark .tabs__tab[aria-selected="true"]{
  color:var(--signal);
  border-bottom-color:var(--signal);
}

/* ---------- 进入视口显现 ---------- */
.reveal{ opacity:1; transform:none; }
html.has-js .reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s ease,transform .5s var(--ease);
}
html.has-js .reveal.is-in{
  opacity:1;
  transform:none;
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.has-js .reveal,
  .reveal{ opacity:1 !important; transform:none !important; }
  .btn:hover,.rail__cta:hover{ transform:none; }
}