/* ============================================================
   乐鱼赛场 · 共享 Site Kit  /assets/site.css
   深海泳道轨道 + 奶油画板 + 编辑部索引
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --sea-900:#061C2C;
  --sea-700:#0B3148;
  --cream-50:#F7F1E5;
  --cream-100:#EFE4D1;
  --ink:#241A14;
  --cyan:#22E0D6;
  --coral:#FF6B4A;
  --signal:#FFD166;
  --pool:#1B7FA8;
  --mist:#6E7F8A;
  --white:#FFFFFF;

  --rail-w:248px;
  --cut:18px;
  --line:rgba(36,26,20,.16);
  --line-soft:rgba(36,26,20,.09);
  --line-dark:rgba(34,224,214,.24);
  --deep-text:#DCEFF0;
  --deep-mute:#8FB6BF;

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:var(--font-display);
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-panel:0 30px 70px -46px rgba(6,28,44,.85);
  --shadow-card:0 18px 36px -22px rgba(6,28,44,.55);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,pre,hr{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit}

/* ---------- 3. 中文排版与页面基底 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--cream-50);
  background-image:repeating-linear-gradient(115deg,rgba(27,127,168,.05) 0 1px,transparent 1px 28px);
  padding-left:0;
  min-height:100vh;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{line-height:1.18;font-weight:700;letter-spacing:-.01em;text-wrap:balance}
p{text-wrap:pretty}
strong{font-weight:800}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
::selection{background:var(--cyan);color:#04141f}
:focus-visible{outline:2px solid var(--coral);outline-offset:3px}
.panel--dark :focus-visible,
.rail-nav :focus-visible,
.site-footer :focus-visible{outline-color:var(--cyan)}

#main-content{display:block;scroll-margin-top:78px}

/* ---------- 4. 通用布局 ---------- */
.shell{width:min(1240px,100% - clamp(32px,6vw,88px));margin-inline:auto}
.shell--tight{width:min(880px,100% - clamp(32px,6vw,88px));margin-inline:auto}
.stack{display:grid;gap:clamp(18px,2.6vw,32px)}
.section{padding-block:clamp(30px,5vw,68px)}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--aside{grid-template-columns:minmax(0,2.1fr) minmax(0,1fr);align-items:start}
.grid--cards{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.rule{height:1px;border:0;background:var(--line);margin:clamp(22px,4vw,40px) 0}
.rule--slant{height:10px;border:0;background:repeating-linear-gradient(105deg,var(--coral) 0 14px,transparent 14px 28px);opacity:.65;margin:clamp(22px,4vw,40px) 0}

/* ---------- 5. 画板 ---------- */
.panel{
  position:relative;
  background:var(--cream-100);
  color:var(--ink);
  padding:clamp(20px,3vw,38px);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
  box-shadow:inset 0 0 0 1px var(--line);
}
.panel--dark{
  background:linear-gradient(158deg,var(--sea-700) 0%,var(--sea-900) 62%,#04141f 100%);
  color:#E9F6F6;
  box-shadow:inset 0 0 0 1px var(--line-dark),var(--shadow-panel);
}
.panel__index{
  position:absolute;top:6px;right:14px;
  font-family:var(--font-mono);font-weight:200;line-height:1;
  font-size:clamp(40px,7vw,78px);
  color:rgba(36,26,20,.10);
  pointer-events:none;
}
.panel--dark .panel__index{color:rgba(34,224,214,.16)}
.panel__head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:10px 20px;margin-bottom:14px}
.panel__eyebrow{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--pool);
}
.panel--dark .panel__eyebrow{color:var(--cyan)}
.panel__title{font-size:clamp(22px,3vw,34px);font-weight:800;letter-spacing:-.015em}
.panel__body{max-width:66ch;color:rgba(36,26,20,.86);font-size:16px}
.panel--dark .panel__body{color:#C6DFE3}
.panel__aside{
  border-left:3px solid var(--signal);
  background:rgba(255,209,102,.16);
  padding:14px 16px;
  font-size:14px;line-height:1.7;
}
.panel--dark .panel__aside{background:rgba(255,209,102,.10);color:#DCEFF0}
.panel__foot{margin-top:18px;display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center}

/* ---------- 6. 索引小标签 ---------- */
.index-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--pool);
}
.index-tag::before{content:"";width:18px;height:2px;background:var(--coral);transform:skewY(-12deg)}
.panel--dark .index-tag{color:var(--cyan)}

/* ---------- 7. 横向主题带 ---------- */
.band{background:var(--sea-900);color:#E6F5F5;padding:14px 0;position:relative;overflow:hidden}
.band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(108deg,rgba(34,224,214,.10) 0 1px,transparent 1px 30px);
}
.band__track{
  position:relative;display:flex;gap:16px;overflow-x:auto;
  padding:0 clamp(16px,4vw,40px);
  scrollbar-width:thin;
}
.band__item{
  flex:0 0 auto;display:flex;align-items:baseline;gap:10px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;
  padding-right:16px;border-right:1px solid var(--line-dark);
}
.band__item strong{color:var(--cyan);font-weight:600}
.band__meta{color:#9DB7BD;font-size:11px}

/* ---------- 8. 数据浮卡 ---------- */
.data-card{
  position:relative;
  background:var(--white);color:var(--ink);
  padding:16px 18px;
  clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,14px 100%,0 calc(100% - 14px));
  box-shadow:inset 0 0 0 1px var(--line),var(--shadow-card);
  transition:transform .35s var(--ease);
}
.data-card--float{transform:rotate(-1.4deg)}
.data-card--float:hover{transform:rotate(0deg)}
.data-card--dark{
  background:linear-gradient(150deg,var(--sea-700),var(--sea-900));
  color:#EAF6F6;
  box-shadow:inset 0 0 0 1px var(--line-dark),var(--shadow-card);
}
.data-card__label{
  display:block;margin-bottom:6px;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--pool);
}
.data-card--dark .data-card__label{color:var(--cyan)}
.data-card__value{
  font-family:var(--font-mono);font-weight:600;line-height:1.1;letter-spacing:-.02em;
  font-size:clamp(22px,3.4vw,34px);
}
.data-card__note{margin-top:6px;font-size:12.5px;color:var(--mist)}
.data-card--dark .data-card__note{color:#9BB9C0}

/* ---------- 9. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 22px;
  font-family:inherit;font-size:15px;font-weight:700;letter-spacing:.02em;
  text-decoration:none;border:1px solid transparent;cursor:pointer;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));
  transition:background-color .25s var(--ease),color .25s var(--ease),transform .25s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--coral);color:#241108}
.btn--primary:hover{background:#FF8266}
.btn--ghost{background:transparent;color:var(--sea-900);box-shadow:inset 0 0 0 1px var(--sea-900)}
.btn--ghost:hover{background:var(--sea-900);color:var(--cream-50)}
.btn--quiet{background:var(--cream-100);color:var(--ink);box-shadow:inset 0 0 0 1px var(--line)}
.btn--quiet:hover{background:var(--cream-50)}
.btn--sm{padding:8px 14px;font-size:13px}
.panel--dark .btn--ghost,
.site-footer .btn--ghost{color:var(--cyan);box-shadow:inset 0 0 0 1px rgba(34,224,214,.45)}
.panel--dark .btn--ghost:hover,
.site-footer .btn--ghost:hover{background:var(--cyan);color:#04141f}

/* ---------- 10. 筛选芯片 ---------- */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 13px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  background:transparent;color:inherit;
  border:1px solid var(--line);
  cursor:pointer;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.chip:hover{border-color:var(--pool);color:var(--pool)}
.chip[aria-pressed="true"],
.chip.is-active{background:var(--cyan);color:#04141f;border-color:var(--cyan);font-weight:700}
.panel--dark .chip{border-color:var(--line-dark);color:#C6DFE3}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb{padding:14px 0;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--mist)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__link{color:var(--pool);text-decoration:none}
.breadcrumb__link:hover{color:var(--coral)}
.breadcrumb__sep{opacity:.5}
.breadcrumb [aria-current="page"]{color:var(--ink)}

/* ---------- 12. 正文 ---------- */
.prose{max-width:68ch;font-size:17px;line-height:1.78;color:rgba(36,26,20,.88)}
.prose>*+*{margin-top:1.05em}
.prose h2{font-size:clamp(22px,3vw,30px);font-weight:800;color:var(--ink)}
.prose h3{font-size:clamp(18px,2.2vw,22px);font-weight:700;color:var(--ink)}
.prose a{color:var(--pool);text-underline-offset:3px}
.prose a:hover{color:var(--coral)}
.prose ul,.prose ol{display:grid;gap:.4em}
.prose li{position:relative;padding-left:20px}
.prose li::before{content:"—";position:absolute;left:0;color:var(--coral)}
.prose blockquote{border-left:3px solid var(--cyan);padding-left:16px;color:var(--mist)}
.panel--dark .prose,
.panel--dark .prose h2,
.panel--dark .prose h3{color:#DCEFF0}

/* ---------- 13. 图片容器（页面阶段放占位图） ---------- */
.media{display:block;margin:0}
.media-frame{
  position:relative;overflow:hidden;aspect-ratio:16 / 9;
  background:
    radial-gradient(120% 90% at 10% 0%,rgba(34,224,214,.55) 0%,rgba(27,127,168,.15) 45%,transparent 70%),
    linear-gradient(155deg,var(--pool) 0%,var(--sea-700) 55%,var(--sea-900) 100%);
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,22px 100%,0 calc(100% - 22px));
  box-shadow:inset 0 0 0 1px var(--line-soft);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(112deg,rgba(255,255,255,.12) 0 1px,transparent 1px 26px);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media__caption{margin-top:8px;font-size:12px;letter-spacing:.04em;color:var(--mist)}
.panel--dark .media__caption{color:#9BB9C0}

/* ---------- 14. 可展开内容组 ---------- */
.expand{display:grid}
.expand__item{border-top:1px solid var(--line)}
.expand__item:last-child{border-bottom:1px solid var(--line)}
.panel--dark .expand__item{border-color:var(--line-dark)}
.expand__trigger{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:15px 4px;background:none;border:0;
  font-family:inherit;font-size:16px;font-weight:700;text-align:left;color:inherit;cursor:pointer;
}
.expand__trigger:hover{color:var(--pool)}
.panel--dark .expand__trigger:hover{color:var(--cyan)}
.expand__icon{
  flex:0 0 auto;font-family:var(--font-mono);font-size:18px;line-height:1;color:var(--coral);
  transition:transform .3s var(--ease);
}
.expand__trigger[aria-expanded="true"] .expand__icon{transform:rotate(45deg)}
.expand__panel{padding:0 4px 16px;font-size:15px;line-height:1.75;color:rgba(36,26,20,.84)}
.panel--dark .expand__panel{color:#C6DFE3}

/* ---------- 15. 入场显现 ---------- */
[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 16. 跳转链接与工具类 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:10px 16px;
  background:var(--cyan);color:#04141f;font-weight:800;text-decoration:none;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}
.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ============================================================
   17. 头部：泳道轨道导航 / 移动抽屉
   ============================================================ */
.site-header{position:relative;z-index:60}

/* 品牌 */
.brand{
  display:grid;
  grid-template-columns:auto 1fr;
  grid-template-areas:"mark name" "mark tag";
  gap:2px 10px;
  text-decoration:none;color:inherit;align-items:center;
}
.brand__mark{
  grid-area:mark;
  width:42px;height:42px;
  display:grid;place-items:center;
  font-family:var(--font-mono);font-weight:700;font-size:19px;
  background:var(--coral);color:#1A1108;
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
}
.brand__name{grid-area:name;font-size:19px;font-weight:800;letter-spacing:.04em;line-height:1.2}
.brand__tagline{grid-area:tag;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;color:var(--cyan);line-height:1.4}
.brand--compact{grid-template-areas:"mark name";gap:0 8px}
.brand--compact .brand__mark{width:32px;height:32px;font-size:15px}
.brand--compact .brand__name{font-size:16px;color:#fff}
.brand--rail .brand__name{color:#FFFFFF}
.brand--footer .brand__name{color:#FFFFFF}
.brand--footer .brand__tagline{color:var(--cyan)}
.brand:hover .brand__mark{background:var(--signal)}

/* 移动顶栏 */
.mobile-bar{
  position:sticky;top:0;z-index:65;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  min-height:60px;
  padding:10px clamp(14px,4vw,20px);
  background:linear-gradient(100deg,var(--sea-900) 0%,var(--sea-700) 100%);
  color:#EFF9F9;
  border-bottom:1px solid rgba(34,224,214,.24);
}
.nav-toggle{
  display:inline-flex;flex-direction:column;align-items:center;gap:4px;
  padding:7px 12px;
  background:transparent;color:var(--cyan);
  border:1px solid rgba(34,224,214,.45);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  cursor:pointer;
}
.nav-toggle__lines{display:grid;gap:4px;justify-items:center}
.nav-toggle__bar{display:block;width:18px;height:2px;background:currentColor}
.nav-toggle__bar+.nav-toggle__bar{width:11px}
.nav-toggle__text{line-height:1}
.nav-toggle[aria-expanded="true"]{background:var(--cyan);color:#04141f;border-color:var(--cyan)}
.nav-toggle:hover{border-color:var(--cyan)}

/* 轨道导航（移动端为抽屉） */
.rail-nav{
  position:fixed;top:0;left:0;bottom:0;z-index:80;
  width:min(88vw,326px);
  display:flex;flex-direction:column;
  padding:18px 18px 16px;
  background:radial-gradient(140% 90% at 0% 0%,#0B3148 0%,#061C2C 58%,#04141f 100%);
  color:var(--deep-text);
  transform:translateX(-104%);
  transition:transform .42s var(--ease);
  overflow-y:auto;overscroll-behavior:contain;
  box-shadow:26px 0 60px -30px rgba(4,20,31,.9);
}
.rail-nav::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(108deg,rgba(34,224,214,.09) 0 1px,transparent 1px 34px);
}
.rail-nav[data-open="true"]{transform:translateX(0)}
.rail__inner{position:relative;display:flex;flex-direction:column;gap:18px;flex:1 1 auto;min-height:0}
.rail__top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;padding-bottom:16px;border-bottom:1px solid var(--line-dark)}
.rail-close{
  flex:0 0 auto;
  background:transparent;border:1px solid rgba(34,224,214,.4);color:var(--cyan);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;
  padding:5px 9px;cursor:pointer;
}
.rail-close:hover{background:var(--cyan);color:#04141f}
.rail__label{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--cyan);opacity:.85;
}
.rail-nav__list{display:grid;gap:2px}
.rail-nav__item{display:block}
.rail-nav__link{
  position:relative;
  display:flex;align-items:baseline;gap:12px;
  padding:9px 10px 9px 14px;
  text-decoration:none;color:#CFE6EA;
  transition:background-color .24s var(--ease),color .24s var(--ease);
}
.rail-nav__link::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:3px;
  background:transparent;transform:skewY(-6deg);
  transition:background-color .24s var(--ease);
}
.rail-nav__link:hover{color:#FFFFFF;background:rgba(34,224,214,.10)}
.rail-nav__index{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.1em;color:#6E9AA6}
.rail-nav__label{font-size:15px;font-weight:600;letter-spacing:.04em}
.rail-nav__link:hover .rail-nav__index{color:var(--cyan)}
.rail-nav__link[aria-current="page"]{
  color:#FFFFFF;
  background:linear-gradient(90deg,rgba(34,224,214,.26),rgba(34,224,214,0) 92%);
}
.rail-nav__link[aria-current="page"]::before{background:var(--cyan)}
.rail-nav__link[aria-current="page"] .rail-nav__index{color:var(--cyan);font-weight:700}
.rail-nav__link[aria-current="page"] .rail-nav__label{font-weight:800}

.rail__utility{margin-top:auto;padding-top:16px;border-top:1px solid var(--line-dark)}
.rail-util__title{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--deep-mute);margin-bottom:8px}
.rail-util__list{display:grid;gap:4px}
.rail-util__link{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:6px 0;
  font-size:13px;color:#D6EAEC;text-decoration:none;
  border-bottom:1px dashed rgba(34,224,214,.2);
}
.rail-util__link::after{content:"→";font-family:var(--font-mono);font-size:12px;color:var(--cyan);transition:transform .25s var(--ease)}
.rail-util__link:hover{color:#FFFFFF}
.rail-util__link:hover::after{transform:translateX(4px)}
.rail__foot{padding-top:14px}
.rail__note{font-size:11px;line-height:1.65;color:var(--deep-mute)}
.rail__meta{margin-top:6px;font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:#5E8792}

.rail__progress{
  position:absolute;top:0;right:0;width:3px;height:100%;
  background:rgba(34,224,214,.14);overflow:hidden;pointer-events:none;
}
.rail__progress-bar{
  display:block;width:100%;height:0;
  background:linear-gradient(180deg,var(--cyan),var(--coral));
}

.rail-scrim{
  display:none;
  position:fixed;inset:0;z-index:70;
  background:rgba(4,20,31,.6);
  opacity:0;pointer-events:none;
  transition:opacity .3s var(--ease);
}

/* 移动端抽屉开启态 */
@media (max-width:959px){
  .rail-scrim{display:block}
  html.is-nav-open .rail-scrim{opacity:1;pointer-events:auto}
  html.is-nav-open{overflow:hidden}
}

/* 桌面端：左侧常驻泳道轨道 */
@media (min-width:960px){
  body{padding-left:var(--rail-w)}
  .mobile-bar{display:none}
  .rail-nav{
    position:fixed;top:0;left:0;bottom:0;
    width:var(--rail-w);
    transform:none;
    padding:30px 22px 20px;
    box-shadow:none;
    z-index:50;
  }
  .rail-close{display:none}
  .rail__top{padding-bottom:20px}
  .rail__label{margin-top:2px}
  .rail-nav__link{padding:10px 10px 10px 14px}
  .rail-nav__label{font-size:15px}
  .rail__inner{gap:20px}
}

/* ============================================================
   18. 页脚：深水索引层
   ============================================================ */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(40px,7vw,96px);
  background:radial-gradient(120% 90% at 100% 0%,#0B3148 0%,#061C2C 58%,#04141f 100%);
  color:#D9EBEE;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(112deg,rgba(34,224,214,.07) 0 1px,transparent 1px 36px);
}
.footer__inner{
  position:relative;
  width:min(1240px,100% - clamp(32px,6vw,88px));
  margin-inline:auto;
  padding:clamp(36px,6vw,64px) 0 clamp(24px,4vw,40px);
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.55fr);
  gap:clamp(26px,4vw,52px);
}
.footer__brand{display:grid;align-content:start;gap:4px}
.footer__tagline{
  margin-top:14px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--cyan);
}
.footer__note{margin-top:8px;max-width:34ch;font-size:12.5px;line-height:1.75;color:#9BB9C0}
.footer__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(116px,1fr));gap:14px 18px}
.footer__cell{border-top:1px solid rgba(34,224,214,.28);padding-top:10px}
.footer__cell-index{display:block;margin-bottom:6px;font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:#6E9AA6}
.footer__cell-link{
  font-size:14px;font-weight:700;letter-spacing:.02em;text-decoration:none;color:#EAF6F6;
  border-bottom:1px solid transparent;padding-bottom:2px;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.footer__cell-link:hover{color:var(--cyan);border-color:var(--cyan)}
.footer__meta{
  grid-column:1 / -1;
  display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:20px 40px;
  margin-top:clamp(6px,1.5vw,14px);
  padding-top:clamp(18px,3vw,28px);
  border-top:1px solid rgba(34,224,214,.2);
}
.footer__legal{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:13px}
.footer__legal-link{
  color:#CFE6E9;text-decoration:none;
  border-bottom:1px solid rgba(34,224,214,.4);padding-bottom:2px;
}
.footer__legal-link:hover{color:var(--cyan);border-color:var(--cyan)}
.footer__contact{display:grid;gap:3px;font-size:13px;color:#B9D3D8;min-width:0}
.footer__contact-label{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan)}
.footer__contact-value{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.02em;color:#E6F6F6;word-break:break-word}
.to-top{
  align-self:center;
  padding:8px 14px;
  background:transparent;color:var(--cyan);
  border:1px solid rgba(34,224,214,.45);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  cursor:pointer;
  transition:background-color .22s var(--ease),color .22s var(--ease);
}
.to-top:hover{background:var(--cyan);color:#04141f}
.footer__base{
  position:relative;
  width:min(1240px,100% - clamp(32px,6vw,88px));
  margin-inline:auto;
  padding:14px 0 24px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 24px;
  border-top:1px solid rgba(34,224,214,.16);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:#7FA3AC;
}
.footer__copy,.footer__icp,.footer__domain{margin:0}
.footer__domain{color:#5E8792}

/* ============================================================
   19. 响应式
   ============================================================ */
@media (max-width:1100px){
  .grid--aside{grid-template-columns:minmax(0,1.8fr) minmax(0,1fr)}
}
@media (max-width:900px){
  .grid--aside{grid-template-columns:minmax(0,1fr)}
  .footer__inner{grid-template-columns:minmax(0,1fr)}
  .footer__meta{flex-direction:column;align-items:flex-start;gap:18px}
  .to-top{align-self:flex-start}
}
@media (max-width:640px){
  body{font-size:15.5px}
  .panel{padding:18px 16px}
  .panel__index{font-size:44px;right:10px}
  .prose{font-size:16px}
  .grid--cards{grid-template-columns:minmax(0,1fr)}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__base{flex-direction:column;align-items:flex-start}
  .breadcrumb{font-size:10px}
}

/* ============================================================
   20. 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;
  }
  [data-reveal]{opacity:1;transform:none}
  .rail-nav{transition:none}
  .data-card--float{transform:none}
}