/* ===========================================================
   德赢体育 · site.css
   深墨绿基底 / 荧光青数据 / 琥珀金节点 / 橙红行动
   =========================================================== */

:root{
  --ink:#061A16;
  --panel:#0B2A24;
  --deep:#03100D;
  --cyan:#2EF2CF;
  --cyan-text:#7BFFE6;
  --amber:#F6B84A;
  --flame:#FF5A36;
  --mist:#F4FBF8;
  --moss:#93AFA7;
  --line:#1D4A40;
  --ok:#6FE39B;

  --rail-w:254px;
  --topbar-h:64px;
  --max:1440px;
  --gutter:clamp(18px,4vw,56px);
  --radius:14px;

  --font-display:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"DIN Alternate","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 01 基础重置 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--topbar-h) + 18px);
}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(1200px 620px at 82% -12%,rgba(46,242,207,.10),transparent 62%),
    radial-gradient(900px 520px at -8% 108%,rgba(246,184,74,.07),transparent 64%);
  background-attachment:fixed;
  color:var(--mist);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img,svg,video,canvas{display:block;max-width:100%;}
ul,ol{margin:0;padding:0;list-style:none;}
p,h1,h2,h3,h4,h5,h6,figure,blockquote,dl,dd{margin:0;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;}

::selection{background:rgba(46,242,207,.28);color:var(--mist);}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:8px;
}

/* ---------- 02 中文排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.14;
  color:var(--mist);
  text-wrap:balance;
}
h1{font-size:clamp(32px,5.2vw,88px);}
h2{font-size:clamp(26px,3.4vw,44px);}
h3{font-size:clamp(20px,2.2vw,26px);font-weight:700;}
h4{font-size:clamp(17px,1.6vw,20px);font-weight:700;}
strong{font-weight:700;color:var(--mist);}
small{font-size:12.5px;color:var(--moss);}
code,kbd,time,.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ---------- 03 跳过链接 ---------- */
.skip-link{
  position:fixed;
  top:8px;
  left:8px;
  z-index:200;
  padding:10px 18px;
  border-radius:999px;
  background:var(--cyan);
  color:#03100D;
  font-family:var(--font-display);
  font-weight:700;
  font-size:14px;
  transform:translateY(-180%);
  transition:transform .18s ease;
}
.skip-link:focus,
.skip-link:focus-visible{transform:none;}

/* ---------- 04 侧边轨道头部 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--rail-w);
  z-index:60;
  display:flex;
  flex-direction:column;
  gap:18px;
  padding:22px 16px 20px;
  background:
    linear-gradient(180deg,rgba(46,242,207,.09),rgba(6,26,22,0) 44%),
    linear-gradient(180deg,#072019,#051713);
  border-right:1px solid var(--line);
  box-shadow:inset -1px 0 0 rgba(46,242,207,.16);
  overflow-y:auto;
  overscroll-behavior:contain;
  scrollbar-width:thin;
  scrollbar-color:var(--line) transparent;
}
.site-header::-webkit-scrollbar{width:4px;}
.site-header::-webkit-scrollbar-thumb{background:var(--line);border-radius:4px;}

.rail-head{
  display:flex;
  flex-direction:column;
  gap:14px;
  position:relative;
  z-index:2;
}

.rail-brand{
  display:flex;
  align-items:center;
  gap:12px;
  padding:10px;
  border:1px solid var(--line);
  border-radius:12px;
  background:rgba(11,42,36,.72);
  transition:border-color .18s ease,background-color .18s ease;
}
.rail-brand:hover{border-color:rgba(46,242,207,.5);background:rgba(11,42,36,.95);}
.rail-brand__mark{
  flex:0 0 auto;
  width:44px;
  height:44px;
  display:grid;
  place-items:center;
  border-radius:12px 4px 12px 4px;
  background:linear-gradient(150deg,var(--cyan),#12C3AB);
  color:#03100D;
  font-family:var(--font-mono);
  font-weight:700;
  font-size:16px;
  letter-spacing:.02em;
  box-shadow:0 10px 26px -16px var(--cyan),inset 0 0 0 1px rgba(3,16,13,.25);
}
.rail-brand__text{display:flex;flex-direction:column;min-width:0;line-height:1.2;}
.rail-brand__name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:17px;
  letter-spacing:.03em;
  color:var(--mist);
}
.rail-brand__meta{
  margin-top:5px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--moss);
}

/* 移动端抽屉按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:8px 14px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(11,42,36,.9);
  color:var(--mist);
  font-family:var(--font-display);
  font-weight:600;
  font-size:13px;
  letter-spacing:.04em;
  transition:border-color .18s ease,color .18s ease;
}
.nav-toggle:hover{border-color:rgba(46,242,207,.5);color:var(--cyan-text);}
.nav-toggle__bars{display:flex;flex-direction:column;gap:3px;width:18px;}
.nav-toggle__bars i{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transition:transform .18s ease,opacity .18s ease,width .18s ease;
}
.nav-toggle__bars i:nth-child(2){width:72%;}
.nav-toggle__label{white-space:nowrap;}

/* 轨道导航 */
.rail-nav{
  position:relative;
  z-index:2;
  display:flex;
  flex-direction:column;
  gap:6px;
  flex:1 1 auto;
  min-height:0;
}
.rail-nav__title{
  display:flex;
  align-items:center;
  gap:8px;
  margin:4px 0 8px 10px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--amber);
}
.rail-nav__title::after{
  content:"";
  flex:1 1 auto;
  height:1px;
  background:linear-gradient(90deg,var(--line),transparent);
}
.rail-nav__list{display:flex;flex-direction:column;gap:2px;}
.rail-nav__item{position:relative;}
.rail-nav__link{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 10px 9px 13px;
  border:1px solid transparent;
  border-radius:10px;
  color:rgba(244,251,248,.78);
  font-size:14.5px;
  line-height:1.4;
  transition:color .18s ease,background-color .18s ease,border-color .18s ease;
}
.rail-nav__link::before{
  content:"";
  position:absolute;
  left:-1px;
  top:50%;
  width:2px;
  height:0;
  border-radius:2px;
  background:var(--cyan);
  transform:translateY(-50%);
  transition:height .18s ease;
}
.rail-nav__index{
  min-width:18px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--moss);
  transition:color .18s ease;
}
.rail-nav__label{
  font-family:var(--font-display);
  font-weight:600;
  letter-spacing:.01em;
}
.rail-nav__link:hover{
  background:rgba(11,42,36,.92);
  border-color:var(--line);
  color:var(--mist);
}
.rail-nav__link:hover .rail-nav__index{color:var(--cyan);}
.rail-nav__link[aria-current="page"]{
  color:var(--cyan-text);
  background:linear-gradient(90deg,rgba(46,242,207,.16),rgba(46,242,207,.02));
  border-color:rgba(46,242,207,.34);
}
.rail-nav__link[aria-current="page"]::before{height:62%;}
.rail-nav__link[aria-current="page"] .rail-nav__index{color:var(--cyan);}

.rail-foot{
  margin-top:auto;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding-top:14px;
  border-top:1px solid var(--line);
  position:relative;
  z-index:2;
}
.rail-cta{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 14px;
  border-radius:12px;
  background:linear-gradient(135deg,#FF5A36,#FF8046);
  color:#180603;
  font-family:var(--font-display);
  font-weight:800;
  font-size:15px;
  letter-spacing:.02em;
  box-shadow:0 16px 32px -20px rgba(255,90,54,.95);
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease;
}
.rail-cta::after{content:"→";font-family:var(--font-mono);font-size:14px;}
.rail-cta:hover{transform:translateY(-1px);filter:saturate(1.08);box-shadow:0 20px 36px -18px rgba(255,90,54,.9);}
.rail-foot__note{
  font-size:11.5px;
  line-height:1.55;
  letter-spacing:.02em;
  color:var(--moss);
}

/* 桌面端为主内容让出轨道宽度 */
@media (min-width:1024px){
  body{padding-left:var(--rail-w);}
}
@media (min-width:1024px) and (max-width:1199px){
  :root{--rail-w:224px;}
}

/* ---------- 05 移动端：顶部条 + 抽屉 ---------- */
@media (max-width:1023px){
  :root{--rail-w:0px;}
  body{
    padding-top:var(--topbar-h);
    background-attachment:scroll;
  }
  .site-header{
    top:0;
    left:0;
    right:0;
    bottom:auto;
    width:auto;
    height:var(--topbar-h);
    flex-direction:row;
    align-items:center;
    gap:0;
    padding:0 var(--gutter);
    border-right:0;
    border-bottom:1px solid var(--line);
    background:rgba(6,26,22,.94);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    overflow:visible;
    box-shadow:0 18px 40px -34px #000;
  }
  .rail-head{
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    width:100%;
  }
  .rail-brand{padding:0;border:0;background:none;gap:10px;border-radius:0;}
  .rail-brand:hover{background:none;border:0;}
  .rail-brand__mark{width:36px;height:36px;font-size:14px;border-radius:10px 3px 10px 3px;}
  .rail-brand__name{font-size:15px;}
  .rail-brand__meta{font-size:9.5px;letter-spacing:.1em;margin-top:2px;}
  .nav-toggle{display:inline-flex;}

  .rail-nav{
    position:fixed;
    top:0;
    left:0;
    height:100vh;
    height:100dvh;
    width:min(84vw,344px);
    flex:0 0 auto;
    padding:calc(var(--topbar-h) + 18px) 18px 24px;
    background:linear-gradient(180deg,#08211C,var(--ink) 62%);
    border-right:1px solid var(--line);
    box-shadow:26px 0 70px -34px #000;
    transform:translateX(-104%);
    transition:transform .22s ease;
    overflow-y:auto;
    z-index:2;
  }
  .site-header[data-open="true"] .rail-nav{transform:none;}
  .site-header::after{
    content:"";
    position:fixed;
    inset:0;
    z-index:1;
    background:rgba(3,16,13,.72);
    opacity:0;
    pointer-events:none;
    transition:opacity .22s ease;
  }
  .site-header[data-open="true"]::after{opacity:1;pointer-events:auto;}
  .site-header[data-open="true"] .nav-toggle{border-color:rgba(46,242,207,.55);color:var(--cyan-text);}
  .site-header[data-open="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg);}
  .site-header[data-open="true"] .nav-toggle__bars i:nth-child(2){opacity:0;width:0;}
  .site-header[data-open="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg);}

  .rail-nav__link{padding:12px 12px 12px 14px;font-size:15.5px;}
  .rail-foot{margin-top:22px;}
}

/* ---------- 06 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background:
    radial-gradient(720px 320px at 16% 0%,rgba(46,242,207,.10),transparent 66%),
    linear-gradient(180deg,rgba(3,16,13,.55),var(--deep));
  border-top:1px solid var(--line);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);
  opacity:.55;
}
.footer-inner{
  position:relative;
  max-width:var(--max);
  margin:0 auto;
  padding:clamp(34px,5vw,64px) var(--gutter) 28px;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);
  gap:clamp(20px,3vw,48px);
  align-items:end;
  padding-bottom:clamp(22px,3vw,36px);
  border-bottom:1px solid var(--line);
}
.footer-brand{display:flex;flex-direction:column;gap:10px;}
.footer-wordmark{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(26px,3.2vw,40px);
  letter-spacing:-.02em;
  line-height:1.1;
  color:var(--mist);
}
.footer-tagline{font-size:13.5px;letter-spacing:.06em;color:var(--moss);}
.footer-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  align-self:flex-start;
  padding:6px 13px;
  border:1px solid rgba(246,184,74,.42);
  border-radius:999px;
  background:rgba(246,184,74,.08);
  color:var(--amber);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
}
.status-dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--ok);
  box-shadow:0 0 0 3px rgba(111,227,155,.18);
}
.footer-score{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--line);
  overflow:hidden;
}
.footer-score__item{
  display:flex;
  flex-direction:column;
  gap:5px;
  padding:13px 14px;
  background:rgba(11,42,36,.9);
}
.footer-score__label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--moss);
}
.footer-score__value{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:15px;
  letter-spacing:.02em;
  color:var(--cyan);
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr 1fr 1.3fr;
  gap:clamp(20px,3vw,44px);
  padding:clamp(26px,3.4vw,40px) 0;
}
.footer-col{display:flex;flex-direction:column;gap:10px;min-width:0;}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--amber);
}
.footer-list{display:flex;flex-direction:column;gap:7px;}
.footer-link{
  width:fit-content;
  max-width:100%;
  font-size:14px;
  color:rgba(244,251,248,.76);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer-link:hover{color:var(--cyan-text);border-bottom-color:rgba(46,242,207,.5);}
.footer-contact{display:flex;flex-direction:column;gap:9px;font-size:14px;}
.footer-contact__row{display:flex;flex-wrap:wrap;gap:4px 10px;align-items:baseline;}
.footer-contact__key{
  min-width:42px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  color:var(--moss);
}
.footer-contact__val{
  color:var(--mist);
  overflow-wrap:anywhere;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-top:18px;
  border-top:1px solid var(--line);
}
.footer-copy{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--moss);
}
.footer-note{font-size:12px;color:rgba(147,175,167,.85);}

@media (min-width:901px){
  .footer-col--wide{
    padding-left:clamp(0px,1.6vw,22px);
    border-left:1px solid var(--line);
  }
}
@media (max-width:900px){
  .footer-top{grid-template-columns:1fr;}
  .footer-score{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-col--wide{grid-column:1 / -1;}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* ---------- 07 通用布局与正文 ---------- */
.container{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}
.section{margin-top:clamp(40px,6vw,88px);}
.section:first-child{margin-top:clamp(24px,4vw,48px);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--amber);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  background:linear-gradient(90deg,var(--cyan),transparent);
}
.divider{
  height:1px;
  border:0;
  margin:clamp(24px,4vw,44px) 0;
  background:linear-gradient(90deg,var(--line),transparent);
}
.prose{
  max-width:42em;
  font-size:17px;
  line-height:1.85;
  color:rgba(244,251,248,.86);
}
.prose p + p{margin-top:1em;}
.prose h2,.prose h3{margin-top:1.6em;margin-bottom:.5em;}
.prose a{color:var(--cyan-text);border-bottom:1px solid rgba(46,242,207,.4);}
.prose ul,.prose ol{margin:1em 0;padding-left:1.2em;list-style:disc;}
.prose li + li{margin-top:.4em;}

.visually-hidden{
  position:absolute !important;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* 网格 */
.grid{display:grid;gap:clamp(14px,2vw,24px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--asym{grid-template-columns:minmax(0,7fr) minmax(0,5fr);}
@media (max-width:900px){
  .grid--2,.grid--3,.grid--asym{grid-template-columns:1fr;}
}

/* ---------- 08 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin-bottom:18px;
  font-size:12.5px;
  color:var(--moss);
}
.breadcrumb__link{color:rgba(244,251,248,.8);transition:color .18s ease;}
.breadcrumb__link:hover{color:var(--cyan-text);}
.breadcrumb__sep{color:var(--line);}
.breadcrumb__current{color:var(--mist);}

/* ---------- 09 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:15px;
  letter-spacing:.01em;
  white-space:nowrap;
  cursor:pointer;
  transition:transform .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.btn--primary{
  background:linear-gradient(135deg,#FF5A36,#FF8046);
  color:#180603;
  box-shadow:0 18px 34px -22px rgba(255,90,54,.95);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 22px 40px -20px rgba(255,90,54,.9);}
.btn--ghost{
  background:rgba(11,42,36,.72);
  border-color:var(--line);
  color:var(--mist);
}
.btn--ghost:hover{border-color:rgba(46,242,207,.55);color:var(--cyan-text);}
.btn--quiet{
  background:transparent;
  border-color:rgba(46,242,207,.36);
  color:var(--cyan-text);
}
.btn--quiet:hover{background:rgba(46,242,207,.1);border-color:var(--cyan);}
.btn--sm{padding:8px 16px;font-size:13.5px;}

/* ---------- 10 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(11,42,36,.6);
  color:var(--moss);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  white-space:nowrap;
}
.tag--cyan{color:var(--cyan-text);border-color:rgba(46,242,207,.38);background:rgba(46,242,207,.1);}
.tag--amber{color:var(--amber);border-color:rgba(246,184,74,.4);background:rgba(246,184,74,.1);}
.tag--flame{color:#FFB39F;border-color:rgba(255,90,54,.45);background:rgba(255,90,54,.12);}
.tag--ok{color:var(--ok);border-color:rgba(111,227,155,.4);background:rgba(111,227,155,.1);}

/* ---------- 11 面板 / 卡片 / 统计 ---------- */
.panel{
  padding:clamp(16px,2vw,26px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(11,42,36,.94),rgba(6,26,22,.94));
  box-shadow:0 28px 64px -50px #000;
}
.panel__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:14px;
}
.card{
  padding:16px;
  border:1px solid var(--line);
  border-radius:12px;
  background:rgba(11,42,36,.72);
  transition:border-color .18s ease,transform .18s ease;
}
.card:hover{border-color:rgba(46,242,207,.4);transform:translateY(-2px);}
.stat{display:flex;flex-direction:column;gap:3px;}
.stat__value{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(30px,4vw,44px);
  line-height:1;
  letter-spacing:-.01em;
  color:var(--cyan);
}
.stat__label{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--moss);
}

/* ---------- 12 标签页 ---------- */
.tabs{display:flex;flex-direction:column;gap:18px;}
.tabs__list{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  width:fit-content;
  max-width:100%;
  padding:6px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(11,42,36,.6);
}
.tab{
  appearance:none;
  border:0;
  border-radius:999px;
  padding:9px 18px;
  background:transparent;
  color:rgba(244,251,248,.72);
  font-family:var(--font-display);
  font-weight:600;
  font-size:14px;
  letter-spacing:.02em;
  cursor:pointer;
  transition:background-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.tab:hover{background:rgba(46,242,207,.08);color:var(--mist);}
.tab[aria-selected="true"]{
  background:linear-gradient(135deg,rgba(46,242,207,.22),rgba(46,242,207,.07));
  color:var(--cyan-text);
  box-shadow:inset 0 0 0 1px rgba(46,242,207,.4);
}
.tabpanel{animation:panel-in .18s ease;}
.tabpanel[hidden]{display:none;}
@keyframes panel-in{
  from{opacity:0;transform:translateY(6px);}
  to{opacity:1;transform:none;}
}

/* ---------- 13 图形容器基础 ---------- */
.media{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(150deg,rgba(46,242,207,.12),rgba(3,16,13,.72) 62%);
}
.media::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(46,242,207,.16) 1px,transparent 1px),
    linear-gradient(90deg,rgba(46,242,207,.16) 1px,transparent 1px);
  background-size:44px 44px;
  opacity:.4;
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(3,16,13,.22) 0 1px,transparent 1px 3px);
  opacity:.35;
}
.media img,
.media svg,
.media video{
  position:relative;
  z-index:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:3;
  padding:14px 16px;
  font-size:12.5px;
  line-height:1.6;
  color:rgba(244,251,248,.92);
  background:linear-gradient(0deg,rgba(3,16,13,.9),transparent);
}
.media--wide{aspect-ratio:21 / 9;}
.media--4x3{aspect-ratio:4 / 3;}
.media--1x1{aspect-ratio:1 / 1;}
.media--tall{aspect-ratio:3 / 4;}

/* ---------- 14 滚动进度与显现 ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:2px;
  z-index:120;
  pointer-events:none;
  background:transparent;
}
.scroll-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--cyan),var(--amber),var(--flame));
  box-shadow:0 0 12px rgba(46,242,207,.55);
  transition:width .1s linear;
}
@media (min-width:1024px){
  .scroll-progress{left:var(--rail-w);}
}
.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s ease,transform .5s ease;
}
.js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 15 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;
  }
  .js [data-reveal]{opacity:1;transform:none;}
  .scroll-progress__bar{transition:none;}
}