/* ============================================================
   博云体育 · site kit (/assets/site.css)
   深墨绿展陈底 / 炭黑导航实色 / 荧光青数据高亮 / 琥珀橙关键数
   ============================================================ */

:root{
  --ink:#0B2B26;
  --ink-deep:#14181A;
  --stone:#3F4A45;
  --moss:#6C8068;
  --clay:#B86B4B;
  --bone:#F2EBDD;
  --cyan:#66F2D2;
  --amber:#F2A33A;
  --slate:#92A6B8;
  --paper:#FBF8EF;

  --line:rgba(242,235,221,.16);
  --line-strong:rgba(242,235,221,.34);
  --dim:rgba(242,235,221,.66);

  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --w-max:1320px;
  --gutter:clamp(20px,4vw,56px);
  --header-h:78px;
  --cut:14px;
  --ease:cubic-bezier(.4,.1,.2,1);
  --t:180ms;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0;}
ul,ol{list-style:none;padding:0;}
img,svg,video{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;}
a{color:inherit;}
[hidden]{display:none !important;}
#main-content{scroll-margin-top:calc(var(--header-h) + 16px);}

/* ---------- base ---------- */
body{
  background:var(--ink);
  color:var(--bone);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

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

::selection{background:var(--cyan);color:var(--ink-deep);}

/* ---------- typography ---------- */
.by-display,.by-heading,.by-footer__brandline{
  font-family:var(--font-display);
  font-weight:800;
  font-stretch:condensed;
  letter-spacing:-.02em;
  line-height:.94;
  text-wrap:balance;
  color:var(--paper);
}
.by-display{font-size:clamp(44px,9vw,132px);line-height:.86;}
.by-heading{font-size:clamp(26px,3.2vw,44px);line-height:1.02;}

.by-kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--moss);
}
.by-kicker::before{
  content:"";
  width:26px;
  height:1px;
  background:var(--cyan);
  flex:0 0 auto;
}

.by-lede{
  font-size:clamp(16px,1.35vw,19px);
  line-height:1.8;
  color:var(--dim);
  max-width:34em;
}

.by-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}

.by-link{
  color:var(--cyan);
  text-decoration:none;
  border-bottom:1px solid rgba(102,242,210,.45);
  padding-bottom:1px;
  transition:color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.by-link:hover{color:var(--paper);border-bottom-color:var(--paper);}

/* ---------- layout ---------- */
.by-container{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.by-section{
  position:relative;
  padding-block:clamp(64px,9vw,132px);
}
.by-section--deep{background:var(--ink-deep);}
.by-section--light{
  background:var(--paper);
  color:var(--ink);
  --line:rgba(11,43,38,.16);
  --line-strong:rgba(11,43,38,.34);
  --dim:rgba(11,43,38,.68);
}
.by-section--light .by-display,
.by-section--light .by-heading{color:var(--ink);}
.by-section--light .by-kicker{color:var(--stone);}
.by-section--light .by-link{color:var(--ink);border-bottom-color:rgba(184,107,75,.6);}
.by-section--light .by-link:hover{color:var(--clay);border-bottom-color:var(--clay);}

.by-grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,28px);
}
.by-span-4{grid-column:span 4;}
.by-span-5{grid-column:span 5;}
.by-span-7{grid-column:span 7;}
.by-span-8{grid-column:span 8;}
.by-span-12{grid-column:span 12;}

/* ---------- breadcrumb ---------- */
.by-breadcrumb{padding-block:18px 0;}
.by-breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--dim);
}
.by-breadcrumb__item{display:inline-flex;align-items:center;gap:10px;}
.by-breadcrumb__link{
  text-decoration:none;
  color:var(--dim);
  transition:color var(--t) var(--ease);
}
.by-breadcrumb__link:hover{color:var(--cyan);}
.by-breadcrumb__sep{color:var(--stone);}
.by-breadcrumb__current{color:var(--paper);}
.by-section--light .by-breadcrumb__current{color:var(--ink);}
.by-section--light .by-breadcrumb__link:hover{color:var(--clay);}

/* ---------- divider (运动轨迹) ---------- */
.by-divider{
  position:relative;
  height:1px;
  border:0;
  margin-block:clamp(28px,4vw,56px);
  background:var(--line);
}
.by-divider::after{
  content:"";
  position:absolute;
  left:0;
  top:-4px;
  width:34px;
  height:9px;
  background:var(--cyan);
  transform:skewX(-32deg);
}

/* ---------- tag ---------- */
.by-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  border:1px solid var(--line-strong);
  color:var(--dim);
  background:rgba(63,74,69,.22);
}
.by-tag--clay{color:var(--clay);border-color:rgba(184,107,75,.55);}
.by-tag--moss{color:var(--moss);border-color:rgba(108,128,104,.55);}
.by-tag--slate{color:var(--slate);border-color:rgba(146,166,184,.5);}
.by-tag--cyan{color:var(--cyan);border-color:rgba(102,242,210,.5);}
.by-tag--amber{color:var(--ink-deep);background:var(--amber);border-color:var(--amber);}

/* ---------- card (切角面板) ---------- */
.by-card{
  --cut:18px;
  position:relative;
  padding:clamp(20px,2.4vw,32px);
  background:rgba(63,74,69,.22);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
}
.by-card::after{
  content:"";
  position:absolute;
  top:0;
  bottom:0;
  left:0;
  width:3px;
  background:var(--cyan);
}
.by-section--light .by-card{background:rgba(11,43,38,.05);}
.by-section--light .by-card::after{background:var(--clay);}

/* ---------- plate (说明牌) ---------- */
.by-plate{
  position:relative;
  padding:clamp(18px,2vw,26px);
  border:1px solid var(--line);
  background:rgba(20,24,26,.5);
}
.by-plate__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--amber);
  margin-bottom:14px;
}
.by-plate__rows{display:grid;gap:10px;}
.by-plate__row{
  display:grid;
  grid-template-columns:44px minmax(0,1fr);
  gap:10px;
  align-items:baseline;
  font-size:14px;
}
.by-plate__key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--moss);
}
.by-plate__value{
  color:var(--paper);
  overflow-wrap:anywhere;
}
.by-plate__note{
  margin-top:14px;
  padding-top:12px;
  border-top:1px dashed var(--line);
  font-size:12.5px;
  line-height:1.7;
  color:var(--dim);
}
.by-plate .by-link{margin-top:14px;display:inline-block;font-size:13px;}

/* ---------- stat (悬浮大数字) ---------- */
.by-stat{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:clamp(18px,2vw,28px);
  background:var(--ink-deep);
  border:1px solid var(--line-strong);
}
.by-stat__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  font-size:clamp(34px,5vw,64px);
  line-height:.9;
  letter-spacing:-.03em;
  color:var(--cyan);
}
.by-stat__unit{
  font-size:.38em;
  letter-spacing:0;
  color:var(--dim);
  margin-left:4px;
}
.by-stat__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--dim);
}
@media (min-width:1000px){
  .by-stat--float{
    z-index:2;
    box-shadow:0 34px 70px -46px #000;
    margin-block-start:-24px;
  }
}

/* ---------- figure (图片容器基础规则) ---------- */
.by-figure{margin:0;display:grid;gap:10px;}
.by-figure__frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  aspect-ratio:16 / 9;
  background:linear-gradient(155deg,#1D2F2B 0%,#0B2B26 45%,#14181A 100%);
}
.by-figure__frame::after{
  content:"";
  position:absolute;
  left:-10%;
  right:-10%;
  bottom:18%;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(102,242,210,.55),transparent);
  transform:rotate(-6deg);
}
.by-figure__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.by-figure__caption{
  display:flex;
  align-items:baseline;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--dim);
}
.by-figure__caption::before{
  content:"";
  width:18px;
  height:1px;
  background:var(--clay);
  flex:0 0 auto;
}
.by-figure--tall .by-figure__frame{aspect-ratio:4 / 5;}
.by-figure--pan .by-figure__frame{aspect-ratio:21 / 9;}
.by-figure--cut .by-figure__frame{
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,0 100%);
}

/* ---------- axis (纵向序号归档轴) ---------- */
.by-axis{
  display:flex;
  flex-direction:column;
  gap:2px;
  list-style:none;
  margin:0;
  padding:0;
}
.by-axis__item{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:10px 0 10px 14px;
  border-left:1px solid var(--line);
  font-size:13.5px;
  color:var(--dim);
  transition:color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.by-axis__item[aria-current="true"]{
  border-left-color:var(--cyan);
  color:var(--paper);
}
.by-axis__num{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--moss);
}
.by-axis__item[aria-current="true"] .by-axis__num{color:var(--cyan);}
.by-axis__label{min-width:0;}

/* ---------- scroll-x (横向数据对照带) ---------- */
.by-scroll-x{
  overflow-x:auto;
  overscroll-behavior-x:contain;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
}
.by-scroll-x::-webkit-scrollbar{height:6px;}
.by-scroll-x::-webkit-scrollbar-thumb{background:var(--stone);}
.by-scroll-x__inner{
  display:flex;
  gap:clamp(12px,1.6vw,20px);
  min-width:max-content;
  padding-bottom:10px;
}
.by-scroll-x__item{
  scroll-snap-align:start;
  flex:0 0 clamp(220px,26vw,300px);
}

/* ---------- accordion ---------- */
.by-accordion{border-top:1px solid var(--line);}
.by-accordion__item{border-bottom:1px solid var(--line);}
.by-accordion__trigger{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 0;
  text-align:left;
  cursor:pointer;
  font-size:clamp(15px,1.5vw,18px);
  font-weight:600;
  line-height:1.5;
  color:var(--paper);
  transition:color var(--t) var(--ease);
}
.by-section--light .by-accordion__trigger{color:var(--ink);}
.by-accordion__trigger:hover,
.by-accordion__trigger[aria-expanded="true"]{color:var(--cyan);}
.by-section--light .by-accordion__trigger:hover,
.by-section--light .by-accordion__trigger[aria-expanded="true"]{color:var(--clay);}
.by-accordion__icon{
  position:relative;
  flex:0 0 16px;
  width:16px;
  height:16px;
}
.by-accordion__icon::before,
.by-accordion__icon::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:7px;
  height:2px;
  background:currentColor;
  transition:transform var(--t) var(--ease);
}
.by-accordion__icon::after{transform:rotate(90deg);}
.by-accordion__trigger[aria-expanded="true"] .by-accordion__icon::after{transform:rotate(0deg);}
.by-accordion__panel{
  max-width:40em;
  padding:0 0 22px;
  font-size:15px;
  line-height:1.8;
  color:var(--dim);
}

/* ---------- buttons ---------- */
.by-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 20px;
  font-family:var(--font-body);
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.03em;
  line-height:1.2;
  text-decoration:none;
  border:1px solid var(--line-strong);
  color:var(--bone);
  background:transparent;
  cursor:pointer;
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
  transition:background-color var(--t) var(--ease),color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.by-btn--solid{
  background:var(--amber);
  border-color:var(--amber);
  color:var(--ink-deep);
}
.by-btn--solid:hover{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink-deep);
}
.by-btn--ghost:hover{
  background:rgba(102,242,210,.14);
  border-color:var(--cyan);
  color:var(--paper);
}
.by-btn--quiet{
  border-color:transparent;
  padding-inline:0;
  color:var(--cyan);
}
.by-btn--quiet:hover{color:var(--paper);}
.by-btn:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  background:var(--cyan);
  color:var(--ink-deep);
  border-color:var(--cyan);
}

/* ============================================================
   HEADER
   ============================================================ */
.by-skip{
  position:fixed;
  left:var(--gutter);
  top:8px;
  z-index:200;
  padding:10px 16px;
  background:var(--cyan);
  color:var(--ink-deep);
  font-weight:700;
  font-size:14px;
  text-decoration:none;
  transform:translateY(-200%);
  transition:transform 160ms var(--ease);
}
.by-skip:focus{transform:translateY(0);}

.by-header{
  position:sticky;
  top:0;
  z-index:120;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color var(--t) var(--ease),border-color var(--t) var(--ease),box-shadow var(--t) var(--ease);
}
.by-header[data-scrolled="true"]{
  background:rgba(20,24,26,.97);
  border-bottom-color:var(--line);
  box-shadow:0 20px 44px -34px rgba(0,0,0,.95);
}

.by-header__inner{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  min-height:var(--header-h);
  padding:14px var(--gutter);
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:clamp(16px,3vw,40px);
  transition:min-height var(--t) var(--ease),padding var(--t) var(--ease);
}
.by-header[data-scrolled="true"] .by-header__inner{
  min-height:62px;
  padding-block:8px;
}

/* brand */
.by-brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--paper);
  min-width:0;
}
.by-brand__mark{
  width:38px;
  height:38px;
  flex:0 0 38px;
  display:grid;
  place-items:center;
  font-family:var(--font-display);
  font-size:17px;
  font-weight:800;
  line-height:1;
  color:var(--ink-deep);
  background:var(--cyan);
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
  transition:background-color var(--t) var(--ease),color var(--t) var(--ease);
}
.by-brand:hover .by-brand__mark{background:var(--amber);}
.by-brand__text{display:flex;flex-direction:column;gap:2px;min-width:0;}
.by-brand__name{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:800;
  letter-spacing:.01em;
  line-height:1.1;
  color:var(--paper);
}
.by-brand__note{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--dim);
  white-space:nowrap;
}

/* nav */
.by-nav{justify-self:center;min-width:0;}
.by-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(4px,1.2vw,20px);
  margin:0;
  padding:0;
}
.by-nav__item{min-width:0;}
.by-nav__link{
  display:flex;
  align-items:baseline;
  gap:6px;
  padding:8px 2px 9px;
  text-decoration:none;
  font-size:14px;
  font-weight:500;
  letter-spacing:.02em;
  color:rgba(242,235,221,.78);
  border-bottom:2px solid transparent;
  transition:color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.by-nav__idx{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--moss);
  transition:color var(--t) var(--ease);
}
.by-nav__label{white-space:nowrap;}
.by-nav__link:hover{color:var(--paper);border-bottom-color:var(--cyan);}
.by-nav__link:hover .by-nav__idx{color:var(--cyan);}
.by-nav__link[aria-current="page"]{
  color:var(--paper);
  border-bottom-color:var(--amber);
}
.by-nav__link[aria-current="page"] .by-nav__idx{color:var(--amber);}

/* actions */
.by-header__actions{
  display:flex;
  align-items:center;
  gap:12px;
  justify-self:end;
}
.by-header__cta{
  --cut:10px;
  padding:11px 16px;
  font-size:13.5px;
  white-space:nowrap;
}

/* nav toggle */
.by-navtoggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:10px 12px;
  border:1px solid var(--line-strong);
  color:var(--bone);
  font-family:var(--font-body);
  font-size:12.5px;
  letter-spacing:.08em;
  cursor:pointer;
  transition:background-color var(--t) var(--ease),color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.by-navtoggle:hover{border-color:var(--cyan);color:var(--cyan);}
.by-navtoggle[aria-expanded="true"]{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink-deep);
}
.by-navtoggle__bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:space-between;
  width:15px;
  height:11px;
}
.by-navtoggle__bars i{
  display:block;
  height:1.5px;
  width:100%;
  background:currentColor;
  transition:transform var(--t) var(--ease),opacity var(--t) var(--ease);
}
.by-navtoggle[aria-expanded="true"] .by-navtoggle__bars i:nth-child(1){transform:translateY(4.75px) rotate(45deg);}
.by-navtoggle[aria-expanded="true"] .by-navtoggle__bars i:nth-child(2){opacity:0;}
.by-navtoggle[aria-expanded="true"] .by-navtoggle__bars i:nth-child(3){transform:translateY(-4.75px) rotate(-45deg);}

/* progress */
.by-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  width:100%;
  height:2px;
  background:var(--cyan);
  transform:scaleX(var(--progress,0));
  transform-origin:left center;
  transition:transform 120ms linear;
  pointer-events:none;
}

/* ============================================================
   FOOTER
   ============================================================ */
.by-footer{
  position:relative;
  margin-top:clamp(72px,10vw,140px);
  background:var(--ink-deep);
  color:var(--bone);
  border-top:1px solid var(--line);
}
.by-footer__inner{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:clamp(40px,5vw,72px) var(--gutter) clamp(26px,3vw,40px);
}
.by-footer__mast{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  padding-bottom:clamp(24px,3vw,40px);
  border-bottom:1px solid var(--line);
}
.by-footer__brandline{
  font-size:clamp(22px,3.4vw,40px);
  max-width:20em;
  color:var(--paper);
}
.by-footer__mastmeta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
}
.by-footer__tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--moss);
  border:1px solid var(--line);
  padding:5px 10px;
}
.by-footer__cta{--cut:12px;font-size:13.5px;}

.by-footer__body{
  display:grid;
  grid-template-columns:1.35fr .85fr;
  gap:clamp(24px,4vw,56px);
  padding-block:clamp(26px,4vw,48px);
}
.by-footer__cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2.4vw,32px);
}
.by-footer__col{min-width:0;}
.by-footer__coltitle{
  display:flex;
  align-items:baseline;
  gap:8px;
  margin-bottom:14px;
  font-family:var(--font-body);
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--paper);
}
.by-footer__colnum{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  color:var(--clay);
}
.by-footer__list{display:grid;gap:8px;}
.by-footer__link{
  display:inline-block;
  padding-block:2px;
  font-size:14px;
  color:var(--dim);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.by-footer__link:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.by-footer__contact{align-self:start;}

.by-footer__legal{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:16px var(--gutter) 20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--dim);
}
.by-footer__copy,.by-footer__icp{margin:0;}
.by-footer__totop{
  color:var(--dim);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.by-footer__totop:hover{color:var(--cyan);border-bottom-color:var(--cyan);}

/* 粘性赛前提醒条 */
.by-reminder{
  position:sticky;
  bottom:0;
  z-index:40;
  display:flex;
  align-items:center;
  gap:14px;
  padding:10px var(--gutter);
  background:#10171A;
  border-top:1px solid rgba(242,163,58,.55);
  font-size:13px;
  line-height:1.5;
}
.by-reminder__clock{
  flex:0 0 auto;
  padding:3px 8px;
  background:var(--amber);
  color:var(--ink-deep);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  font-weight:700;
}
.by-reminder__text{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:6px 12px;
  margin:0;
  min-width:0;
}
.by-reminder__link{
  color:var(--amber);
  font-weight:600;
  text-decoration:none;
  white-space:nowrap;
  border-bottom:1px solid rgba(242,163,58,.5);
  transition:color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.by-reminder__link:hover{color:var(--paper);border-bottom-color:var(--paper);}
.by-reminder__note{color:var(--dim);font-size:12.5px;}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1100px){
  .by-header__inner{
    grid-template-columns:1fr auto;
    gap:12px;
  }
  .by-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    justify-self:stretch;
    background:var(--ink-deep);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    transition:max-height 220ms var(--ease),visibility 220ms var(--ease);
  }
  .by-nav[data-open="true"]{
    max-height:min(74vh,620px);
    overflow-y:auto;
    visibility:visible;
  }
  .by-nav[data-open="false"]{max-height:0;visibility:hidden;}
  .by-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px var(--gutter) 18px;
  }
  .by-nav__item{border-top:1px solid var(--line);}
  .by-nav__item:first-child{border-top:0;}
  .by-nav__link{
    padding:15px 0;
    font-size:16.5px;
    border-bottom:0;
    border-left:2px solid transparent;
    padding-left:12px;
  }
  .by-nav__link:hover{border-bottom:0;border-left-color:var(--cyan);}
  .by-nav__link[aria-current="page"]{
    color:var(--cyan);
    border-bottom:0;
    border-left-color:var(--amber);
  }
  .by-nav__idx{font-size:11.5px;}
  .by-navtoggle{display:inline-flex;}
}

@media (max-width:900px){
  .by-span-4,.by-span-5,.by-span-7,.by-span-8{grid-column:span 12;}
  .by-footer__body{grid-template-columns:1fr;}
  .by-footer__cols{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:768px){
  .by-axis{
    flex-direction:row;
    gap:8px;
    overflow-x:auto;
    scroll-snap-type:x proximity;
    padding-bottom:6px;
  }
  .by-axis__item{
    flex:0 0 auto;
    scroll-snap-align:start;
    border-left:0;
    border-bottom:1px solid var(--line);
    padding:8px 14px 8px 0;
  }
  .by-axis__item[aria-current="true"]{border-bottom-color:var(--cyan);}
}

@media (max-width:720px){
  .by-brand__note{display:none;}
  .by-reminder__note{display:none;}
  .by-footer__brandline{font-size:clamp(20px,6vw,26px);}
  .by-footer__cols{grid-template-columns:1fr;}
}

@media (max-width:560px){
  :root{--header-h:66px;--gutter:18px;}
  .by-header__cta{padding:9px 12px;font-size:12.5px;}
  .by-brand__mark{width:34px;height:34px;flex-basis:34px;font-size:15px;}
  .by-brand__name{font-size:17px;}
  .by-navtoggle{padding:9px 10px;}
  .by-footer__legal{letter-spacing:.06em;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .by-progress{transition:none;}
  .by-scroll-x{scroll-snap-type:none;}
}