/* ==========================================================================
   云开体育站 · 共享样式 /assets/site.css
   1 变量  2 Reset  3 中文排版  4 框架式页头  5 展签式页脚
   6 通用布局  7 通用组件  8 动效与可访问性
   ========================================================================== */

/* ---------- 1 变量 ---------- */
:root{
  --yk-teal:#0E7C86;
  --yk-deep:#0A5A62;
  --yk-gold:#F2B705;
  --yk-ink:#102A43;
  --yk-green:#1F9D6B;
  --yk-coral:#E4573D;
  --yk-mist:#F7FAFB;
  --yk-gray:#DCE6EC;
  --yk-glow:#5FC9D6;
  --yk-gold-veil:rgba(242,183,5,.20);
  --yk-ink-70:rgba(16,42,67,.70);
  --yk-ink-55:rgba(16,42,67,.55);
  --yk-rail-w:232px;
  --yk-rail-compact:108px;
  --yk-topbar-h:54px;
  --yk-max:1240px;
  --yk-cut:18px;
  --yk-ease:cubic-bezier(0.22,0.61,0.36,1);
  --yk-font-head:"Oswald","Archivo Narrow","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --yk-font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --yk-font-num:"Roboto Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 2 Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;}
h1,h2,h3,h4,h5,p,dl,dd,dt,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
img{height:auto;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
table{border-collapse:collapse;width:100%;}
[hidden]{display:none !important;}

/* ---------- 3 中文排版 ---------- */
body{
  font-family:var(--yk-font-body);
  font-size:16.5px;
  font-weight:400;
  line-height:1.75;
  color:var(--yk-ink);
  background:var(--yk-mist);
  min-height:100vh;
  overflow-x:hidden;
  padding-top:var(--yk-topbar-h);
  padding-left:0;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--yk-font-head);font-weight:800;letter-spacing:-.01em;line-height:1.16;text-wrap:balance;}
h1{font-size:clamp(32px,5.2vw,68px);}
h2{font-size:clamp(23px,3vw,38px);}
h3{font-size:clamp(18px,2vw,23px);}
strong,b{font-weight:700;}
.yk-num{font-family:var(--yk-font-num);font-variant-numeric:tabular-nums;font-weight:700;letter-spacing:-.01em;}
.yk-prose{max-width:640px;font-size:16.5px;line-height:1.78;color:var(--yk-ink-70);}
.yk-prose p+p{margin-top:1em;}
.yk-prose strong{color:var(--yk-ink);}
.yk-note{font-size:13px;line-height:1.7;color:var(--yk-ink-55);border-left:2px solid var(--yk-gray);padding-left:12px;}

/* ---------- 4 框架式页头 ---------- */
.yk-skip{
  position:fixed;top:-80px;left:16px;z-index:200;
  padding:11px 18px;background:var(--yk-ink);color:#fff;
  font-size:14px;font-weight:700;
  transition:top .18s var(--yk-ease);
}
.yk-skip:focus{top:14px;}

.yk-header{position:relative;z-index:74;}

.yk-topbar{
  position:fixed;top:0;left:0;right:0;height:var(--yk-topbar-h);z-index:74;
  display:flex;align-items:center;gap:14px;padding:0 16px;
  background:rgba(247,250,251,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--yk-gray);
}

.yk-brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--yk-ink);}
.yk-brand__mark{display:inline-flex;color:var(--yk-teal);}
.yk-brand__mark svg{width:30px;height:30px;}
.yk-brand__text{display:flex;flex-direction:column;line-height:1.12;}
.yk-brand__name{font-family:var(--yk-font-head);font-weight:800;font-size:17px;letter-spacing:.01em;}
.yk-brand__line{font-size:11.5px;letter-spacing:.06em;color:var(--yk-ink-55);}

.yk-topbar__status{display:flex;align-items:center;gap:9px;font-size:12.5px;color:var(--yk-ink-70);font-family:var(--yk-font-num);}
.yk-pill{
  font-family:var(--yk-font-num);font-size:12px;font-weight:700;color:var(--yk-deep);
  background:linear-gradient(120deg,rgba(14,124,134,.14),var(--yk-gold-veil));
  border:1px solid rgba(14,124,134,.28);
  padding:2px 9px;
  clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px);
}
.yk-topbar__sep{display:inline-block;width:16px;height:2px;background:linear-gradient(90deg,var(--yk-teal),var(--yk-gold));}

.yk-quick{display:none;}

.yk-burger{
  display:inline-flex;align-items:center;gap:9px;margin-left:auto;
  padding:7px 12px;border:1px solid var(--yk-gray);background:#fff;color:var(--yk-ink);
  font-size:13px;font-weight:700;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
  transition:color .16s var(--yk-ease),border-color .16s var(--yk-ease);
}
.yk-burger:hover{border-color:var(--yk-teal);color:var(--yk-teal);}
.yk-burger__box{display:flex;flex-direction:column;gap:4px;}
.yk-burger__bar{display:block;width:18px;height:2px;border-radius:2px;background:currentColor;transition:transform .18s var(--yk-ease),opacity .18s var(--yk-ease);}
.yk-burger[aria-expanded="true"] .yk-burger__bar:nth-child(1){transform:translateY(6px) rotate(45deg);}
.yk-burger[aria-expanded="true"] .yk-burger__bar:nth-child(2){opacity:0;}
.yk-burger[aria-expanded="true"] .yk-burger__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.yk-burger__text{font-family:var(--yk-font-body);}

.yk-progress{position:fixed;top:var(--yk-topbar-h);left:0;right:0;height:2px;z-index:70;pointer-events:none;background:rgba(220,230,236,.5);}
.yk-progress__bar{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--yk-teal) 0%,var(--yk-glow) 55%,var(--yk-gold) 100%);}

.yk-scrim{position:fixed;inset:0;z-index:68;background:rgba(16,42,67,.46);opacity:0;pointer-events:none;transition:opacity .22s var(--yk-ease);}
.yk-scrim[data-open="true"]{opacity:1;pointer-events:auto;}

.yk-rail{
  position:fixed;left:0;top:0;bottom:0;z-index:72;
  width:min(84vw,320px);
  display:flex;flex-direction:column;gap:20px;
  padding:calc(var(--yk-topbar-h) + 16px) 18px 26px;
  background:linear-gradient(180deg,#FFFFFF 0%,#EFF6F7 58%,#E4EFF2 100%);
  border-right:1px solid var(--yk-gray);
  overflow-y:auto;
  -webkit-overflow-scrolling:touch;
  transform:translateX(-104%);
  transition:transform .32s var(--yk-ease),width .24s var(--yk-ease);
}
.yk-rail[data-open="true"]{transform:translateX(0);}

.yk-nav{flex:1 1 auto;}
.yk-nav__list{display:flex;flex-direction:column;gap:2px;counter-reset:yknav;}
.yk-nav__item{counter-increment:yknav;}
.yk-nav__link{
  position:relative;display:flex;align-items:center;gap:10px;
  padding:11px 12px 11px 16px;
  font-size:15px;font-weight:700;letter-spacing:.01em;color:var(--yk-ink);
  transition:background .16s var(--yk-ease),color .16s var(--yk-ease),transform .16s var(--yk-ease);
}
.yk-nav__link::before{
  content:counter(yknav,decimal-leading-zero);
  font-family:var(--yk-font-num);font-size:11px;font-weight:700;letter-spacing:.04em;
  color:var(--yk-glow);min-width:20px;
}
.yk-nav__link::after{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--yk-glow);
  transform:scaleY(0);transform-origin:top;transition:transform .18s var(--yk-ease),background .18s var(--yk-ease);
}
.yk-nav__link:hover{background:rgba(220,230,236,.55);transform:translateX(3px);}
.yk-nav__link:hover::after{transform:scaleY(1);}
.yk-nav__link[aria-current="page"]{background:linear-gradient(90deg,rgba(14,124,134,.14),rgba(14,124,134,0));color:var(--yk-teal);}
.yk-nav__link[aria-current="page"]::before{color:var(--yk-teal);}
.yk-nav__link[aria-current="page"]::after{transform:scaleY(1);background:var(--yk-teal);}

.yk-rail__foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:16px;border-top:1px solid var(--yk-gray);}
.yk-cta{
  display:block;text-align:center;padding:12px 10px;
  font-size:14px;font-weight:700;color:#fff;
  background:linear-gradient(120deg,var(--yk-teal),var(--yk-deep));
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transition:background .16s var(--yk-ease),transform .16s var(--yk-ease);
}
.yk-cta:hover{background:linear-gradient(120deg,var(--yk-deep),var(--yk-teal));}
.yk-cta:active{transform:translateY(1px);}
.yk-rail__note{font-size:12px;line-height:1.6;letter-spacing:.02em;color:var(--yk-ink-55);}

/* ---------- 5 展签式页脚 ---------- */
.yk-footer{
  position:relative;margin-top:80px;
  background:linear-gradient(180deg,#FBFDFD 0%,#F2F8F9 100%);
  border-top:1px solid var(--yk-gray);
}
.yk-footer__glow{height:4px;width:100%;background:linear-gradient(90deg,var(--yk-teal) 0%,var(--yk-glow) 42%,var(--yk-gold) 100%);}
.yk-footer__inner{max-width:var(--yk-max);margin:0 auto;padding:48px 20px 34px;}
.yk-footer__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 16px;padding-bottom:26px;border-bottom:1px solid var(--yk-gray);}
.yk-footer__brand{font-family:var(--yk-font-head);font-weight:800;font-size:24px;letter-spacing:-.01em;}
.yk-footer__tagline{font-family:var(--yk-font-num);font-size:12.5px;letter-spacing:.08em;color:var(--yk-ink-55);}
.yk-footer__grid{display:grid;grid-template-columns:minmax(0,1fr);gap:28px 24px;padding:30px 0 26px;}
.yk-col{min-width:0;}
.yk-col--contact{border-top:1px solid var(--yk-gray);padding-top:20px;}
.yk-col__title{
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
  font-family:var(--yk-font-head);font-size:13px;font-weight:800;letter-spacing:.14em;color:var(--yk-teal);
}
.yk-col__title::before{content:"";width:14px;height:2px;background:var(--yk-gold);}
.yk-col__list{display:flex;flex-direction:column;gap:9px;}
.yk-col__link{font-size:14.5px;color:var(--yk-ink-70);border-bottom:1px solid transparent;transition:color .15s var(--yk-ease),border-color .15s var(--yk-ease);}
.yk-col__link:hover{color:var(--yk-teal);border-bottom-color:var(--yk-glow);}
.yk-contact{display:flex;flex-direction:column;gap:12px;}
.yk-contact__row{display:grid;grid-template-columns:74px minmax(0,1fr);gap:10px;align-items:baseline;}
.yk-contact__label{font-size:12.5px;letter-spacing:.06em;color:var(--yk-ink-55);}
.yk-contact__value{font-size:14px;color:var(--yk-ink);word-break:break-all;}
.yk-footer__legal{display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;padding-top:20px;border-top:1px solid var(--yk-gray);}
.yk-footer__legal-text{font-family:var(--yk-font-num);font-size:12.5px;letter-spacing:.02em;color:var(--yk-ink-55);}

/* ---------- 6 通用布局 ---------- */
.yk-container{width:100%;max-width:var(--yk-max);margin:0 auto;padding:0 20px;}
.yk-container--wide{max-width:1440px;}
.yk-section{padding:48px 0;}
.yk-section--tight{padding:28px 0;}
.yk-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:20px;}

/* ---------- 7 通用组件 ---------- */
.yk-label{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 16px;padding-top:14px;border-top:2px solid var(--yk-ink);margin-bottom:26px;}
.yk-label__no{font-family:var(--yk-font-num);font-size:12.5px;font-weight:700;letter-spacing:.16em;color:var(--yk-teal);}
.yk-label__name{font-family:var(--yk-font-head);font-weight:800;font-size:clamp(20px,2.4vw,26px);letter-spacing:-.01em;}
.yk-label__desc{font-size:13px;color:var(--yk-ink-55);margin-left:auto;}

.yk-panel{
  position:relative;background:#fff;border:1px solid var(--yk-gray);padding:24px;
  clip-path:polygon(var(--yk-cut) 0,100% 0,100% calc(100% - var(--yk-cut)),calc(100% - var(--yk-cut)) 100%,0 100%,0 var(--yk-cut));
}
.yk-panel--ink{background:linear-gradient(150deg,var(--yk-ink) 0%,#0C2136 62%,var(--yk-deep) 100%);color:#EAF3F5;border-color:transparent;}
.yk-panel--ink .yk-label__name,.yk-panel--ink h2,.yk-panel--ink h3{color:#F2F7F9;}
.yk-panel--ink .yk-prose{color:rgba(234,243,245,.78);}
.yk-panel--tex{background-image:repeating-linear-gradient(2deg,rgba(16,42,67,.055) 0 1px,transparent 1px 7px);}
.yk-panel--ink.yk-panel--tex{background-image:repeating-linear-gradient(2deg,rgba(95,201,214,.09) 0 1px,transparent 1px 8px);}
.yk-panel--lift{transition:transform .18s var(--yk-ease),box-shadow .18s var(--yk-ease);}
.yk-panel--lift:hover{transform:translateY(-3px);box-shadow:0 14px 28px -20px rgba(16,42,67,.55);}

.yk-tag{
  display:inline-flex;align-items:center;gap:5px;padding:2px 8px;
  font-family:var(--yk-font-num);font-size:12px;font-weight:700;letter-spacing:.02em;
}
.yk-tag--up{color:var(--yk-green);background:rgba(31,157,107,.12);}
.yk-tag--down{color:var(--yk-coral);background:rgba(228,87,61,.12);}
.yk-tag--gold{color:var(--yk-ink);background:var(--yk-gold-veil);}
.yk-tag--ghost{color:var(--yk-ink-70);box-shadow:inset 0 0 0 1px var(--yk-gray);}

.yk-btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:12px 26px 12px 20px;
  font-size:15px;font-weight:700;letter-spacing:.02em;color:#fff;background:var(--yk-teal);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 13px),calc(100% - 13px) 100%,0 100%);
  transition:background .16s var(--yk-ease),transform .16s var(--yk-ease),color .16s var(--yk-ease);
}
.yk-btn:hover{background:var(--yk-deep);}
.yk-btn:active{transform:translateY(1px);}
.yk-btn--gold{background:var(--yk-gold);color:var(--yk-ink);}
.yk-btn--gold:hover{background:#D9A404;}
.yk-btn--ghost{background:transparent;color:var(--yk-teal);box-shadow:inset 0 0 0 1.5px var(--yk-teal);}
.yk-btn--ghost:hover{background:rgba(14,124,134,.09);color:var(--yk-deep);}
.yk-btn__arrow{font-family:var(--yk-font-num);font-weight:700;}

.yk-breadcrumb{font-size:13px;color:var(--yk-ink-55);}
.yk-breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.yk-breadcrumb__item{display:inline-flex;align-items:center;gap:8px;}
.yk-breadcrumb__item+.yk-breadcrumb__item::before{content:"›";color:var(--yk-glow);font-family:var(--yk-font-num);}
.yk-breadcrumb__link{color:var(--yk-ink-70);border-bottom:1px solid transparent;transition:color .15s var(--yk-ease),border-color .15s var(--yk-ease);}
.yk-breadcrumb__link:hover{color:var(--yk-teal);border-bottom-color:var(--yk-glow);}

.yk-media{
  position:relative;display:block;overflow:hidden;min-height:180px;aspect-ratio:16/10;
  background:linear-gradient(140deg,var(--yk-teal) 0%,var(--yk-deep) 55%,var(--yk-ink) 100%);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 20px),calc(100% - 20px) 100%,0 100%);
}
.yk-media::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.12) 0 1px,transparent 1px 14px);
}
.yk-media__img{position:relative;width:100%;height:100%;object-fit:cover;}
.yk-media__caption{
  position:absolute;left:0;right:0;bottom:0;padding:12px 16px;
  font-size:12.5px;line-height:1.5;color:#EAF3F5;
  background:linear-gradient(0deg,rgba(16,42,67,.76),rgba(16,42,67,0));
}
.yk-media--wide{aspect-ratio:21/9;}
.yk-media--tall{aspect-ratio:3/4;}
.yk-media--square{aspect-ratio:1/1;}
.yk-media--soft{background:linear-gradient(140deg,#E8F3F5 0%,#F7FAFB 55%,var(--yk-gold-veil) 100%);}

.yk-tabs{display:block;}
.yk-tablist{display:flex;flex-wrap:wrap;gap:6px;border-bottom:1px solid var(--yk-gray);}
.yk-tab{
  position:relative;margin-bottom:-1px;padding:10px 16px;
  font-size:14px;font-weight:700;color:var(--yk-ink-55);
  border-bottom:3px solid transparent;
  transition:color .15s var(--yk-ease),background .15s var(--yk-ease),border-color .15s var(--yk-ease);
}
.yk-tab:hover{color:var(--yk-teal);background:rgba(220,230,236,.42);}
.yk-tab[aria-selected="true"]{color:var(--yk-teal);border-bottom-color:var(--yk-gold);}
.yk-tabpanel{padding-top:22px;}

/* ---------- 8 动效与可访问性 ---------- */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .38s var(--yk-ease),transform .38s var(--yk-ease);}
[data-reveal].is-in{opacity:1;transform:none;}

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

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

/* ---------- 9 响应式 ---------- */
@media (max-width:519px){
  .yk-topbar__meta{display:none;}
  .yk-brand__line{display:none;}
}
@media (min-width:640px){
  .yk-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .yk-col--contact{grid-column:1 / -1;border-top:1px solid var(--yk-gray);}
}
@media (min-width:760px){
  .yk-grid{grid-template-columns:repeat(12,minmax(0,1fr));gap:24px;}
  .yk-span-1{grid-column:span 1;}
  .yk-span-2{grid-column:span 2;}
  .yk-span-3{grid-column:span 3;}
  .yk-span-4{grid-column:span 4;}
  .yk-span-5{grid-column:span 5;}
  .yk-span-6{grid-column:span 6;}
  .yk-span-7{grid-column:span 7;}
  .yk-span-8{grid-column:span 8;}
  .yk-span-9{grid-column:span 9;}
  .yk-span-10{grid-column:span 10;}
  .yk-span-12{grid-column:span 12;}
  .yk-section{padding:76px 0;}
  .yk-section--tight{padding:36px 0;}
}
@media (min-width:900px){
  body{padding-left:var(--yk-rail-w);}
  .yk-quick{display:flex;align-items:center;gap:18px;margin-left:auto;font-size:13px;color:var(--yk-ink-70);}
  .yk-quick__link{position:relative;padding-bottom:2px;transition:color .15s var(--yk-ease);}
  .yk-quick__link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:linear-gradient(90deg,var(--yk-teal),var(--yk-gold));transform:scaleX(0);transform-origin:left;transition:transform .18s var(--yk-ease);}
  .yk-quick__link:hover{color:var(--yk-teal);}
  .yk-quick__link:hover::after{transform:scaleX(1);}
  .yk-burger{display:none;}
  .yk-scrim{display:none;}
  .yk-rail{
    top:var(--yk-topbar-h);width:var(--yk-rail-w);transform:none;
    padding:24px 16px 22px;gap:18px;
  }
  .yk-rail[data-open="true"]{transform:none;}
  html[data-compact] body{padding-left:var(--yk-rail-compact);}
  html[data-compact] .yk-rail{width:var(--yk-rail-compact);padding:20px 10px 18px;}
  html[data-compact] .yk-nav__link{font-size:11.5px;padding:10px 6px;gap:6px;}
  html[data-compact] .yk-nav__link::before{font-size:10px;min-width:16px;}
  html[data-compact] .yk-rail__note{display:none;}
  html[data-compact] .yk-cta{font-size:11.5px;padding:10px 4px;}
  .yk-footer__grid{grid-template-columns:repeat(3,minmax(140px,1fr)) minmax(260px,1.5fr);}
  .yk-col--contact{grid-column:auto;border-top:0;border-left:1px solid var(--yk-gray);padding-top:0;padding-left:22px;}
}
@media (min-width:1040px){
  .yk-container{padding:0 28px;}
  .yk-footer__inner{padding:56px 28px 36px;}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  [data-reveal]{opacity:1;transform:none;transition:none;}
  .yk-rail,.yk-nav__link,.yk-nav__link::after,.yk-quick__link::after,.yk-btn,.yk-cta,.yk-panel--lift,.yk-burger__bar,.yk-progress__bar{transition:none !important;}
  .yk-panel--lift:hover{transform:none;}
}