/* ==========================================================================
   乐鱼体育中心 · 共享站点样式 /assets/site.css
   结构：重置 / 变量 / 基础排版 / 布局容器 / 页头 / 页脚 / 通用组件 / 图片容器 / 动效
   ========================================================================== */

/* 1. 重置 ---------------------------------------------------------------- */
*,
*::before,
*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}

/* 2. 变量 ---------------------------------------------------------------- */
:root{
  --abyss-900:#061A2E;
  --deep-sea-800:#0B2A4A;
  --harbor-700:#143D63;
  --current-600:#1B7A96;
  --aurora-400:#00E5FF;
  --aurora-150:#8FF3FF;
  --coral-500:#FF6B4A;
  --coral-200:#FFB09C;
  --foam-050:#F4F8FB;
  --mist-100:#E3EBF2;
  --ink-900:#0A1622;
  --slate-500:#5C7183;

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-head:"Inter","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-data:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --rail-w:64px;
  --page-max:1240px;
  --page-wide:1560px;
  --text-w:34em;
  --gutter:clamp(18px,4vw,48px);
  --sp-1:clamp(12px,1.4vw,18px);
  --sp-2:clamp(18px,2.2vw,28px);
  --sp-3:clamp(28px,3.6vw,44px);
  --sp-4:clamp(44px,6vw,84px);
  --sp-5:clamp(64px,8vw,120px);
  --cut:20px;
  --shadow-panel:0 28px 60px -38px rgba(6,26,46,.55);
  --ease:cubic-bezier(.22,.7,.3,1);
}

/* 3. 基础排版 ------------------------------------------------------------ */
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--ink-900);
  background-color:var(--foam-050);
  background-image:linear-gradient(180deg,#F4F8FB 0%,#EDF3F9 55%,#F4F8FB 100%);
  min-height:100vh;
  padding-left:0;
  transition:padding-left .3s var(--ease);
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-head);
  font-weight:900;
  line-height:1.25;
  letter-spacing:.01em;
}
p{max-width:var(--text-w)}
.display{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:.02em;
  font-size:clamp(34px,7vw,88px);
  line-height:1.08;
}
.data-num{
  font-family:var(--font-data);
  font-weight:500;
  font-variant-numeric:tabular-nums;
  letter-spacing:.01em;
}
::selection{background:var(--aurora-400);color:var(--abyss-900)}
:focus-visible{outline:2px solid var(--aurora-400);outline-offset:3px}

.skip-link{
  position:absolute;
  left:var(--gutter);
  top:10px;
  z-index:200;
  transform:translateY(-190%);
  background:var(--coral-500);
  color:var(--abyss-900);
  font-family:var(--font-head);
  font-weight:800;
  font-size:14px;
  letter-spacing:.06em;
  padding:12px 20px;
  clip-path:polygon(12px 0,100% 0,100% 100%,0 100%,0 12px);
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* 4. 布局容器 ------------------------------------------------------------ */
.container{width:100%;max-width:var(--page-max);margin-inline:auto;padding-inline:var(--gutter)}
.container--wide{max-width:var(--page-wide)}
.section{padding-block:var(--sp-4)}
.section--tight{padding-block:var(--sp-3)}
.section--foam{background:var(--foam-050)}
.section--mist{background:linear-gradient(180deg,#EDF3F9,#E3EBF2)}
.section--dark{background:linear-gradient(160deg,var(--deep-sea-800),var(--abyss-900));color:var(--foam-050)}
.section--abyss{background:var(--abyss-900);color:var(--foam-050)}
.section--dark p,.section--abyss p{color:rgba(244,248,251,.76)}
.section-head{display:grid;gap:var(--sp-1);max-width:56em}
.eyebrow{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-head);
  font-size:12px;
  font-weight:800;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--current-600);
}
.eyebrow::before{content:"";width:28px;height:2px;background:linear-gradient(90deg,var(--aurora-400),var(--coral-500))}
.section--dark .eyebrow,.section--abyss .eyebrow{color:var(--aurora-150)}
.section-title{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:.02em;
  font-size:clamp(26px,3.6vw,40px);
  line-height:1.2;
}
.lede{
  font-size:clamp(17px,1.5vw,19px);
  line-height:1.7;
  color:var(--slate-500);
  max-width:var(--text-w);
}
.hairline{height:1px;border:0;background:linear-gradient(90deg,var(--aurora-400),rgba(27,122,150,.25) 68%,rgba(27,122,150,0))}
.grid{display:grid;gap:clamp(18px,2.4vw,32px)}
.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:899px){
  .grid--2,.grid--3,.grid--asym{grid-template-columns:minmax(0,1fr)}
}

/* 5. 页头 ---------------------------------------------------------------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  color:var(--foam-050);
  background-color:var(--deep-sea-800);
  background-image:
    radial-gradient(120% 170% at 50% -45%, rgba(0,229,255,.24), rgba(0,229,255,0) 62%),
    linear-gradient(180deg,#0B2A4A 0%,#07203A 100%);
  border-bottom:1px solid rgba(27,122,150,.55);
  transition:box-shadow .25s var(--ease);
}
.site-header[data-scrolled]{box-shadow:0 22px 46px -30px rgba(6,26,46,.95)}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:70;
  background:rgba(244,248,251,.08);
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--aurora-400),var(--coral-500));
}

.brand-rail{display:none}

.header-inner{
  width:100%;
  max-width:var(--page-wide);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.masthead{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:var(--sp-1);
  padding:18px 0 14px;
}
.masthead__meta{
  justify-self:start;
  font-family:var(--font-head);
  font-size:12px;
  font-weight:700;
  letter-spacing:.2em;
  color:rgba(143,243,255,.75);
  max-width:none;
}
.masthead__brand{justify-self:center;text-align:center;display:inline-block}
.masthead__name{
  display:block;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(24px,3.2vw,40px);
  letter-spacing:.08em;
  line-height:1.1;
  transition:color .2s var(--ease);
}
.masthead__brand:hover .masthead__name{color:var(--aurora-400)}
.masthead__sub{
  display:block;
  margin-top:5px;
  font-family:var(--font-data);
  font-size:10px;
  letter-spacing:.34em;
  text-transform:uppercase;
  color:rgba(143,243,255,.7);
}
.masthead__aside{
  justify-self:end;
  display:flex;
  align-items:center;
  gap:14px;
}
.season-badge{
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--aurora-150);
  border:1px solid rgba(0,229,255,.42);
  background:rgba(0,229,255,.09);
  padding:6px 10px;
  white-space:nowrap;
  max-width:none;
}
.header-cta{white-space:nowrap}

.nav-bar{position:relative;border-top:1px solid rgba(27,122,150,.45)}
.site-nav__list{display:flex;justify-content:center;flex-wrap:wrap;gap:clamp(14px,2.6vw,38px)}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:16px 2px;
  font-family:var(--font-head);
  font-weight:700;
  font-size:15px;
  letter-spacing:.06em;
  color:rgba(244,248,251,.84);
  transition:color .2s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:10px;
  height:2px;
  width:0;
  background:linear-gradient(90deg,var(--aurora-400),var(--coral-500));
  transition:width .26s var(--ease);
}
.site-nav__link:hover{color:var(--aurora-400)}
.site-nav__link:hover::after{width:100%}
.site-nav__link[aria-current="page"]{color:var(--aurora-400)}
.site-nav__link[aria-current="page"]::after{width:100%}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  border:1px solid rgba(143,243,255,.45);
  background:rgba(0,229,255,.08);
  color:var(--aurora-150);
  font-family:var(--font-head);
  font-weight:700;
  font-size:13px;
  letter-spacing:.14em;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{background:rgba(0,229,255,.18);color:var(--foam-050)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  background:currentColor;
  transition:background-color .2s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:2px;
  background:currentColor;
  transition:transform .24s var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__text{line-height:1}

.float-dock{
  position:fixed;
  right:clamp(14px,2.5vw,30px);
  bottom:clamp(14px,2.5vw,30px);
  z-index:80;
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:10px;
}
.float-dock__panel{
  display:none;
  flex-direction:column;
  gap:8px;
  padding:10px;
  background:var(--abyss-900);
  border:1px solid rgba(0,229,255,.32);
  clip-path:polygon(14px 0,100% 0,100% 100%,0 100%,0 14px);
  box-shadow:0 26px 52px -26px rgba(0,0,0,.9);
}
.float-dock[data-open] .float-dock__panel{display:flex}
.dock-action{
  white-space:nowrap;
  padding:9px 14px;
  font-family:var(--font-head);
  font-weight:700;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--foam-050);
  background:rgba(27,122,150,.3);
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.dock-action:hover{background:var(--aurora-400);color:var(--abyss-900)}
.fish-btn{
  width:54px;
  height:54px;
  display:grid;
  place-items:center;
  border-radius:50%;
  color:var(--abyss-900);
  background:linear-gradient(135deg,var(--aurora-400),var(--current-600));
  box-shadow:0 18px 34px -16px rgba(0,229,255,.7);
  transition:transform .25s var(--ease);
}
.fish-btn:hover{transform:translateY(-3px)}
.fish-btn__icon{width:26px;height:16px;fill:currentColor}

@media (min-width:1180px){
  body{padding-left:var(--rail-w)}
  html[data-rail="closed"] body{padding-left:0}
  .brand-rail{
    display:flex;
    position:fixed;
    top:0;
    left:0;
    bottom:0;
    width:var(--rail-w);
    z-index:65;
    flex-direction:column;
    align-items:center;
    justify-content:space-between;
    padding:26px 0;
    background:linear-gradient(180deg,var(--abyss-900),var(--deep-sea-800));
    border-right:1px solid rgba(0,229,255,.24);
    transition:transform .3s var(--ease);
  }
  html[data-rail="closed"] .brand-rail{transform:translateX(-100%)}
  .brand-rail__mark{
    writing-mode:vertical-rl;
    font-family:var(--font-head);
    font-weight:900;
    font-size:12px;
    letter-spacing:.42em;
    text-transform:uppercase;
    color:var(--aurora-400);
    max-width:none;
  }
  .brand-rail__label{
    writing-mode:vertical-rl;
    font-family:var(--font-display);
    font-weight:900;
    font-size:18px;
    letter-spacing:.28em;
    color:var(--foam-050);
    max-width:none;
  }
  .brand-rail__line{
    flex:1;
    width:1px;
    margin:18px 0;
    background:linear-gradient(180deg,var(--aurora-400),rgba(0,229,255,0));
  }
  .brand-rail__season{
    writing-mode:vertical-rl;
    font-family:var(--font-data);
    font-size:12px;
    letter-spacing:.2em;
    color:var(--aurora-150);
    max-width:none;
  }
}

@media (max-width:899px){
  .masthead{grid-template-columns:1fr auto;padding:16px 0 14px}
  .masthead__meta{display:none}
  .masthead__brand{justify-self:start;text-align:left}
  .masthead__aside{justify-self:end;gap:10px}
  .masthead__aside .season-badge{display:none}
  .nav-toggle{display:inline-flex}
  .nav-bar{border-top:0;height:0}
  .site-nav{
    display:none;
    position:absolute;
    top:0;
    left:calc(var(--gutter) * -1);
    right:calc(var(--gutter) * -1);
    z-index:5;
    padding:6px 0 12px;
    background:var(--abyss-900);
    border-top:1px solid rgba(0,229,255,.3);
    border-bottom:1px solid rgba(0,229,255,.3);
    box-shadow:0 30px 54px -28px rgba(0,0,0,.9);
  }
  .site-nav[data-open]{display:block}
  .site-nav__list{flex-direction:column;gap:0}
  .site-nav__item{border-bottom:1px solid rgba(27,122,150,.28)}
  .site-nav__item:last-child{border-bottom:0}
  .site-nav__link{display:block;padding:15px var(--gutter);font-size:17px}
  .site-nav__link::after{left:var(--gutter);bottom:8px;right:auto}
  .site-nav__link:hover::after,
  .site-nav__link[aria-current="page"]::after{width:34px}
}
@media (max-width:599px){
  .header-cta{display:none}
  .masthead__name{font-size:23px;letter-spacing:.06em}
}

/* 6. 页脚 ---------------------------------------------------------------- */
.site-footer{
  position:relative;
  margin-top:var(--sp-5);
  background:var(--foam-050);
}
.footer-wave{line-height:0}
.footer-wave svg{width:100%;height:clamp(44px,7vw,104px);fill:var(--abyss-900)}
.footer-body{
  background:var(--abyss-900);
  background-image:radial-gradient(90% 120% at 15% 0%, rgba(0,229,255,.12), rgba(0,229,255,0) 60%);
  color:rgba(244,248,251,.78);
}
.footer-inner{
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
  padding:clamp(34px,4.5vw,62px) var(--gutter) clamp(26px,3.5vw,46px);
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,2fr);
  gap:clamp(26px,4vw,64px);
}
.footer-brand{display:grid;gap:12px;justify-items:start}
.footer-brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(22px,2.4vw,30px);
  letter-spacing:.08em;
  color:var(--foam-050);
  max-width:none;
}
.footer-brand__tag{
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--aurora-400);
  max-width:none;
}
.footer-brand__note{
  font-size:15px;
  line-height:1.7;
  color:rgba(244,248,251,.72);
  max-width:30em;
}
.footer-cta{margin-top:6px}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,2.4vw,32px);
}
.footer-col__title{
  font-family:var(--font-head);
  font-weight:800;
  font-size:13px;
  letter-spacing:.18em;
  color:var(--aurora-150);
  margin-bottom:14px;
  max-width:none;
}
.footer-col__list{display:grid;gap:10px}
.footer-col__link{
  display:inline-block;
  font-size:15px;
  color:rgba(244,248,251,.82);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-col__link:hover{color:var(--aurora-400);border-color:var(--aurora-400)}
.footer-base{
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
  padding:0 var(--gutter) clamp(26px,3.5vw,42px);
  display:flex;
  flex-wrap:wrap;
  gap:8px 30px;
  align-items:baseline;
  border-top:1px solid rgba(27,122,150,.45);
  padding-top:clamp(18px,2.4vw,26px);
}
.footer-base p{
  font-size:13px;
  line-height:1.7;
  color:rgba(244,248,251,.6);
  max-width:none;
}
.footer-contact{color:rgba(244,248,251,.82);font-family:var(--font-data);letter-spacing:.02em}
.footer-icp{font-family:var(--font-data);letter-spacing:.06em;color:rgba(143,243,255,.7)}
.footer-copy{margin-left:auto;color:rgba(244,248,251,.72)}
@media (max-width:899px){
  .footer-inner{grid-template-columns:minmax(0,1fr)}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-copy{margin-left:0}
}
@media (max-width:520px){
  .footer-cols{grid-template-columns:minmax(0,1fr)}
}

/* 7. 通用组件 ------------------------------------------------------------ */
.btn{
  position:relative;
  isolation:isolate;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 24px;
  font-family:var(--font-head);
  font-weight:800;
  font-size:15px;
  letter-spacing:.06em;
  transition:color .22s var(--ease);
}
.btn::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  clip-path:polygon(12px 0,100% 0,100% 100%,0 100%,0 12px);
  transition:background-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn--sm{padding:9px 16px;font-size:13px;letter-spacing:.08em}
.btn--primary{color:var(--abyss-900)}
.btn--primary::before{background:var(--coral-500)}
.btn--primary:hover{color:var(--abyss-900)}
.btn--primary:hover::before{background:var(--aurora-400)}
.btn--ghost{color:var(--deep-sea-800)}
.btn--ghost::before{background:transparent;box-shadow:inset 0 0 0 1px var(--current-600)}
.btn--ghost:hover{color:var(--abyss-900)}
.btn--ghost:hover::before{background:var(--aurora-150);box-shadow:inset 0 0 0 1px var(--aurora-400)}
.btn--ghost-light{color:var(--foam-050)}
.btn--ghost-light::before{background:transparent;box-shadow:inset 0 0 0 1px rgba(143,243,255,.5)}
.btn--ghost-light:hover{color:var(--aurora-150)}
.btn--ghost-light:hover::before{background:rgba(0,229,255,.14);box-shadow:inset 0 0 0 1px var(--aurora-400)}

.breadcrumbs{font-size:13px;color:var(--slate-500)}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs__link{transition:color .2s var(--ease)}
.breadcrumbs__link:hover{color:var(--current-600)}
.breadcrumbs__sep{opacity:.5}
.breadcrumbs__current{color:var(--ink-900);font-weight:600}

.cut-card{
  position:relative;
  padding:clamp(20px,2.6vw,32px);
  background:#fff;
  clip-path:polygon(var(--cut) 0,100% 0,100% 100%,0 100%,0 var(--cut));
  box-shadow:var(--shadow-panel);
  transition:clip-path .28s var(--ease),background-color .28s var(--ease);
}
.cut-card:hover{--cut:30px;background-color:var(--foam-050)}
.cut-card--mist{background:var(--mist-100)}
.section--dark .cut-card,.section--abyss .cut-card{background:var(--harbor-700);color:var(--foam-050);box-shadow:none}

.panel{
  padding:clamp(18px,2.4vw,30px);
  background:#fff;
  border-left:3px solid var(--aurora-400);
}
.panel--dark{background:var(--deep-sea-800);color:var(--foam-050);border-left-color:var(--coral-500)}

.stat{display:grid;gap:4px}
.stat__value{
  font-family:var(--font-data);
  font-weight:500;
  font-variant-numeric:tabular-nums;
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.1;
  color:var(--coral-500);
}
.section--dark .stat__value,.section--abyss .stat__value{color:var(--aurora-400)}
.stat__label{
  font-family:var(--font-head);
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--slate-500);
  max-width:none;
}
.section--dark .stat__label,.section--abyss .stat__label{color:rgba(143,243,255,.8)}

.tag{
  display:inline-block;
  padding:5px 10px;
  font-family:var(--font-head);
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  background:var(--coral-200);
  color:var(--abyss-900);
}
.tag--aurora{background:rgba(0,229,255,.2);color:var(--deep-sea-800)}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 14px;
  font-family:var(--font-head);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--deep-sea-800);
  background:rgba(227,235,242,.9);
  clip-path:polygon(10px 0,100% 0,100% 100%,0 100%,0 10px);
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.chip:hover{background:var(--aurora-400);color:var(--abyss-900)}
.chip[aria-pressed="true"],.chip[aria-selected="true"]{background:var(--deep-sea-800);color:var(--aurora-400)}

.data-table__wrap{width:100%;overflow-x:auto}
.data-table{min-width:520px;font-size:15px}
.data-table caption{
  caption-side:top;
  text-align:left;
  font-family:var(--font-head);
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--slate-500);
  padding-bottom:10px;
}
.data-table th{
  padding:12px 14px;
  background:var(--harbor-700);
  color:var(--foam-050);
  font-family:var(--font-head);
  font-weight:800;
  font-size:13px;
  letter-spacing:.1em;
  text-align:left;
  white-space:nowrap;
}
.data-table td{
  padding:12px 14px;
  border-bottom:1px solid var(--mist-100);
  vertical-align:top;
}
.data-table tbody tr:nth-child(even){background:rgba(227,235,242,.55)}
.data-table td .data-num{color:var(--deep-sea-800)}

.tabs{display:flex;flex-wrap:wrap;gap:8px}
.tabs__btn{
  padding:9px 16px;
  font-family:var(--font-head);
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--deep-sea-800);
  background:rgba(227,235,242,.95);
  clip-path:polygon(10px 0,100% 0,100% 100%,0 100%,0 10px);
  transition:background-color .22s var(--ease),color .22s var(--ease);
}
.tabs__btn:hover{background:rgba(0,229,255,.25)}
.tabs__btn[aria-selected="true"]{background:var(--aurora-400);color:var(--abyss-900)}
.tab-panel{padding-top:var(--sp-2)}

.fold{border-top:1px solid var(--mist-100)}
.fold:last-of-type{border-bottom:1px solid var(--mist-100)}
.fold__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  padding:18px 0;
  text-align:left;
  font-family:var(--font-head);
  font-weight:800;
  font-size:17px;
  color:var(--ink-900);
  transition:color .2s var(--ease);
}
.fold__head:hover{color:var(--current-600)}
.fold__icon{
  flex:none;
  width:22px;
  height:22px;
  position:relative;
  border:1px solid var(--current-600);
}
.fold__icon::before,
.fold__icon::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  background:var(--current-600);
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.fold__icon::before{width:10px;height:1.5px;transform:translate(-50%,-50%)}
.fold__icon::after{width:1.5px;height:10px;transform:translate(-50%,-50%)}
.fold[data-open] .fold__icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
.fold__body{padding:0 0 22px;color:var(--slate-500);max-width:var(--text-w)}

/* 8. 图片容器 ------------------------------------------------------------ */
.media{
  position:relative;
  overflow:hidden;
  background:linear-gradient(140deg,var(--deep-sea-800),var(--abyss-900));
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background-image:
    linear-gradient(112deg,rgba(0,229,255,.22),rgba(0,229,255,0) 58%),
    repeating-linear-gradient(112deg,rgba(244,248,251,.07) 0 1px,rgba(244,248,251,0) 1px 22px);
}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--3x2{aspect-ratio:3/2}
.media--1x1{aspect-ratio:1/1}
.media__img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.88) contrast(1.08);
}
.media__badge{
  position:absolute;
  z-index:2;
  left:0;
  top:0;
  padding:6px 12px;
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.08em;
  background:var(--coral-500);
  color:var(--abyss-900);
}
.media__caption{
  margin-top:10px;
  font-size:13px;
  color:var(--slate-500);
  max-width:34em;
}

/* 9. 动效 ---------------------------------------------------------------- */
html.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
html.js-ready [data-reveal].is-visible{opacity:1;transform:none}

#main-content:focus{outline:none}

@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.js-ready [data-reveal]{opacity:1;transform:none}
}