/* =========================================================
   星空体育 CN · 共享样式 /assets/site.css
   深空蓝基底 / 电光青与暖橙数据强调 / Bento 信息板
   ========================================================= */

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

/* ---------- 2. 变量 ---------- */
:root{
  --ink:#070B1A;
  --ink-2:#0D1633;
  --nebula:#14265C;
  --cyan:#25E6D3;
  --orange:#FF8A3D;
  --white:#F4F7FF;
  --silver:#A8B4D8;
  --violet:#7A5CFF;
  --red:#FF5C7A;
  --green:#3DDC97;

  --line:rgba(168,180,216,.16);
  --line-strong:rgba(37,230,211,.38);
  --line-soft:rgba(168,180,216,.30);

  --radius-s:14px;
  --radius-m:20px;
  --radius-l:28px;

  --shell:1240px;
  --header-offset:150px;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100%;
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 640px at 82% -12%, rgba(122,92,255,.24), transparent 62%),
    radial-gradient(900px 560px at 6% 2%, rgba(37,230,211,.13), transparent 60%),
    linear-gradient(180deg,#070B1A 0%,#0A1130 48%,#070B1A 100%);
  color:var(--white);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
@media (min-width:900px){ body{font-size:17px} }

h1,h2,h3,h4{font-weight:800;line-height:1.22;letter-spacing:-.005em}
p{color:inherit}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

[id]{scroll-margin-top:var(--header-offset)}
#main-content{display:block;scroll-margin-top:var(--header-offset)}

::selection{background:rgba(37,230,211,.32);color:var(--white)}

/* ---------- 4. Skip link ---------- */
.skip-link{
  position:fixed;
  left:50%;
  top:-72px;
  transform:translateX(-50%);
  z-index:200;
  padding:12px 24px;
  border-radius:0 0 16px 16px;
  background:linear-gradient(120deg,var(--cyan),#12B9C9);
  color:#04121A;
  font-weight:700;
  letter-spacing:.12em;
  font-size:14px;
  box-shadow:0 18px 40px -20px rgba(37,230,211,.9);
  transition:top .24s var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 5. 头部报头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(7,11,26,.97) 0%,rgba(13,22,51,.9) 72%,rgba(13,22,51,.78) 100%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.site-header[data-scrolled]{
  border-bottom-color:rgba(37,230,211,.30);
  box-shadow:0 22px 48px -34px rgba(0,0,0,.95);
}

.reading-progress{
  position:absolute;
  left:0;right:0;top:0;
  height:2px;
  background:rgba(168,180,216,.12);
  overflow:hidden;
}
.reading-progress__bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--violet) 52%,var(--orange) 100%);
  transition:transform .12s linear;
}

.masthead{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 20px;
}
.masthead__inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  padding:14px 0 12px;
  border-bottom:1px solid var(--line);
}
.masthead__meta{
  display:flex;
  align-items:center;
  gap:12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--silver);
  min-width:0;
}
.masthead__meta--right{justify-content:flex-end;gap:10px}
.masthead__tick{
  width:8px;height:8px;flex:none;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 4px rgba(61,220,151,.14);
  animation:tick-pulse 2.8s ease-in-out infinite;
}
.masthead__label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.masthead__brand{display:flex;justify-content:center}

@keyframes tick-pulse{
  0%,100%{box-shadow:0 0 0 4px rgba(61,220,151,.14)}
  50%{box-shadow:0 0 0 9px rgba(61,220,151,.04)}
}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:14px}
.brand__mark{
  position:relative;
  width:44px;height:44px;flex:none;
  display:grid;place-items:center;
}
.brand__orbit{
  position:absolute;inset:0;
  border-radius:50%;
  border:1px solid rgba(37,230,211,.55);
  box-shadow:inset 0 0 22px rgba(37,230,211,.16);
  animation:orbit-spin 18s linear infinite;
}
.brand__orbit::after{
  content:"";
  position:absolute;
  top:-3px;left:50%;
  width:6px;height:6px;
  margin-left:-3px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 10px rgba(255,138,61,.9);
}
.brand__core{
  width:16px;height:16px;
  border-radius:50%;
  background:radial-gradient(circle at 32% 30%,#FFFFFF 0%,var(--cyan) 44%,var(--violet) 100%);
  box-shadow:0 0 20px rgba(37,230,211,.62);
}
.brand__text{display:flex;flex-direction:column;line-height:1.12}
.brand__cn{font-size:22px;font-weight:800;letter-spacing:.16em}
.brand__en{font-family:var(--font-mono);font-size:9px;letter-spacing:.36em;color:var(--silver);margin-top:3px}
.brand--footer .brand__mark{width:38px;height:38px}
.brand--footer .brand__cn{font-size:19px}
.brand--footer .brand__en{font-size:8px;letter-spacing:.3em}

@keyframes orbit-spin{to{transform:rotate(360deg)}}

/* 报头行动按钮 */
.masthead__cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 16px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.1em;
  color:var(--white);
  border:1px solid rgba(255,138,61,.48);
  background:linear-gradient(120deg,rgba(255,138,61,.18),rgba(122,92,255,.20));
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.masthead__cta:hover{
  border-color:var(--orange);
  transform:translateY(-1px);
  box-shadow:0 14px 30px -18px rgba(255,138,61,.95);
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(20,38,92,.7);
  color:var(--white);
  font-size:13px;
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color .25s var(--ease),background .25s var(--ease);
}
.nav-toggle:hover{border-color:var(--line-strong);background:rgba(20,38,92,.95)}
.nav-toggle[aria-expanded="true"]{border-color:var(--line-strong);background:rgba(37,230,211,.10)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{
  display:block;height:2px;width:100%;
  border-radius:2px;
  background:var(--cyan);
  transition:transform .25s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

/* 导航 */
.site-nav{
  max-height:0;
  overflow:hidden;
  opacity:0;
  visibility:hidden;
  transition:max-height .38s var(--ease),opacity .28s var(--ease),visibility .28s var(--ease);
}
.site-nav[data-open]{
  max-height:74vh;
  overflow-y:auto;
  opacity:1;
  visibility:visible;
}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:4px;
  padding:10px 0 12px;
}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:9px 14px;
  border-radius:999px;
  font-size:15px;
  letter-spacing:.1em;
  color:rgba(244,247,255,.76);
  transition:color .22s var(--ease),background .22s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:5px;
  height:1px;
  transform:scaleX(0);
  transform-origin:50% 50%;
  background:linear-gradient(90deg,var(--cyan),rgba(37,230,211,0));
  transition:transform .3s var(--ease);
}
.site-nav__link:hover{color:var(--white);background:rgba(37,230,211,.07)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{
  color:var(--white);
  background:rgba(20,38,92,.92);
}
.site-nav__link[aria-current="page"]::after{
  transform:scaleX(1);
  background:linear-gradient(90deg,var(--cyan),var(--orange));
}
.site-nav__link[aria-current="page"]::before{
  content:"";
  position:absolute;
  top:7px;right:9px;
  width:5px;height:5px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 8px var(--cyan);
}

@media (max-width:899px){
  .nav-toggle{display:inline-flex}
  .masthead__inner{grid-template-columns:1fr auto;gap:12px;padding:12px 0 10px}
  .masthead__meta--left{display:none}
  .masthead__brand{justify-content:flex-start}
  .masthead__cta{display:none}
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px 0 14px;
  }
  .site-nav__item{border-bottom:1px solid var(--line)}
  .site-nav__item:last-child{border-bottom:0}
  .site-nav__link{
    width:100%;
    justify-content:space-between;
    padding:15px 10px;
    border-radius:12px;
    font-size:16px;
  }
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{background:rgba(37,230,211,.09)}
  .site-nav__link[aria-current="page"]::before{top:50%;right:12px;margin-top:-3px}
}

@media (min-width:900px){
  .site-nav{
    max-height:none;
    overflow:visible;
    opacity:1;
    visibility:visible;
    transition:none;
  }
}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,120px);
  background:linear-gradient(180deg,rgba(13,22,51,.42) 0%,#080D20 42%,#060A17 100%);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.footer-glow{
  position:absolute;
  left:-10%;right:-10%;bottom:-45%;
  height:360px;
  pointer-events:none;
  background:
    radial-gradient(60% 100% at 18% 100%,rgba(37,230,211,.16),transparent 70%),
    radial-gradient(52% 100% at 82% 92%,rgba(122,92,255,.24),transparent 72%);
}
.footer-inner{
  position:relative;
  max-width:var(--shell);
  margin:0 auto;
  padding:clamp(46px,6vw,80px) 20px 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(30px,4vw,52px);
}
.footer-brand__text{
  margin-top:18px;
  max-width:34ch;
  font-size:15px;
  line-height:1.85;
  color:var(--silver);
}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.footer-tag{
  padding:5px 11px;
  border-radius:999px;
  border:1px solid rgba(37,230,211,.26);
  background:rgba(37,230,211,.06);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
}
.footer-col{min-width:0}
.footer-col__title{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:18px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.3em;
  color:var(--silver);
}
.footer-col__title::before{
  content:"";
  width:18px;height:1px;flex:none;
  background:linear-gradient(90deg,var(--orange),rgba(255,138,61,0));
}
.footer-list{display:grid;gap:11px}
.footer-list__link{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:15px;
  color:rgba(244,247,255,.82);
  transition:color .22s var(--ease),transform .22s var(--ease);
}
.footer-list__link::before{
  content:"";
  width:6px;height:6px;flex:none;
  border-radius:50%;
  background:rgba(168,180,216,.42);
  transition:background .22s var(--ease),box-shadow .22s var(--ease);
}
.footer-list__link:hover{color:var(--white);transform:translateX(3px)}
.footer-list__link:hover::before{background:var(--cyan);box-shadow:0 0 8px var(--cyan)}

.footer-contact{display:grid;gap:14px}
.footer-contact__item{display:grid;gap:4px}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  color:rgba(168,180,216,.7);
}
.footer-contact__value{
  font-size:14px;
  line-height:1.75;
  color:var(--white);
  word-break:break-word;
}
.footer-note{
  margin-top:16px;
  padding-left:12px;
  border-left:1px solid rgba(255,138,61,.4);
  font-size:13px;
  line-height:1.75;
  color:rgba(168,180,216,.76);
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 24px;
  margin-top:clamp(36px,5vw,62px);
  padding-top:22px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:rgba(168,180,216,.82);
}
.footer-bottom__copy{margin:0}
.footer-bottom__icp{margin:0;color:rgba(168,180,216,.68)}
.to-top{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 16px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(20,38,92,.5);
  color:var(--white);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  cursor:pointer;
  transition:transform .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.to-top:hover{border-color:var(--line-strong);color:var(--cyan);transform:translateY(-2px)}

@media (min-width:640px){
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:1000px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.35fr}
}

/* ---------- 7. 布局容器与章节 ---------- */
.container{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 20px;
}
.container--narrow{max-width:900px}

.section{padding:clamp(46px,7vw,96px) 0}
.section__head{display:grid;gap:14px;max-width:760px}
.section__eyebrow{
  display:flex;
  align-items:center;
  gap:12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.32em;
  text-transform:uppercase;
  color:var(--cyan);
}
.section__eyebrow::before{
  content:"";
  width:30px;height:1px;flex:none;
  background:linear-gradient(90deg,var(--cyan),rgba(37,230,211,0));
}
.section__title{font-size:clamp(28px,4.4vw,56px);line-height:1.14}
.section__lead{
  max-width:42ch;
  font-size:17px;
  color:var(--silver);
}

/* ---------- 8. 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:22px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--silver);
}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs__item + .breadcrumbs__item::before{content:"/";color:rgba(168,180,216,.45)}
.breadcrumbs__link{color:var(--silver);transition:color .2s var(--ease)}
.breadcrumbs__link:hover{color:var(--cyan)}
.breadcrumbs__current{color:var(--white)}

/* ---------- 9. 栅格与 Bento ---------- */
.grid{display:grid;gap:clamp(16px,2vw,24px);grid-template-columns:1fr}
.bento{display:grid;gap:clamp(16px,2vw,24px);grid-template-columns:repeat(12,1fr)}

.bento__card,
.card{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-l);
  background:linear-gradient(160deg,rgba(20,38,92,.72) 0%,rgba(13,22,51,.52) 58%,rgba(7,11,26,.62) 100%);
  overflow:hidden;
}
.bento__card{
  grid-column:span 12;
  padding:clamp(20px,2.6vw,32px);
  transition:transform .35s var(--ease),border-color .35s var(--ease),box-shadow .35s var(--ease);
}
.bento__card::after{
  content:"";
  position:absolute;inset:0;
  border-radius:inherit;
  pointer-events:none;
  background:radial-gradient(120% 90% at 100% 0%,rgba(37,230,211,.12),transparent 62%);
}
.bento__card:hover{
  border-color:var(--line-strong);
  transform:translateY(-3px);
  box-shadow:0 28px 60px -40px rgba(37,230,211,.7);
}
.card{padding:clamp(20px,2.4vw,30px);border-radius:var(--radius-m);background:rgba(13,22,51,.62)}

@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,1fr)}
  .bento__card--sm{grid-column:span 4}
  .bento__card--half{grid-column:span 6}
  .bento__card--third{grid-column:span 4}
  .bento__card--wide{grid-column:span 8}
  .bento__card--tall{grid-column:span 4;grid-row:span 2}
}
@media (min-width:1024px){
  .grid--3{grid-template-columns:repeat(3,1fr)}
  .grid--asym{grid-template-columns:1.45fr 1fr}
}

/* ---------- 10. 卡片内容与数据 ---------- */
.card__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--silver);
}
.card__title{margin-top:10px;font-size:22px;font-weight:700;line-height:1.4}
.card__meta{margin-top:12px;font-size:13px;line-height:1.7;color:var(--silver)}

.stat{display:grid;gap:6px}
.stat__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(30px,4vw,48px);
  font-weight:700;
  line-height:1;
  color:var(--cyan);
}
.stat__unit{margin-left:6px;font-family:var(--font-mono);font-size:14px;color:var(--silver)}
.stat__label{font-size:13px;letter-spacing:.1em;color:var(--silver)}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.num--hero{
  display:block;
  font-size:clamp(56px,11vw,132px);
  font-weight:700;
  line-height:.9;
  color:var(--white);
  text-shadow:0 0 70px rgba(37,230,211,.32);
}
.num--cyan{color:var(--cyan)}
.num--orange{color:var(--orange)}
.num--green{color:var(--green)}
.num--red{color:var(--red)}

.annot{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--silver);
}
.annot--vertical{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  letter-spacing:.34em;
}

/* ---------- 11. 标签与按钮 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(20,38,92,.45);
  color:var(--silver);
  font-size:12px;
  letter-spacing:.1em;
  white-space:nowrap;
}
.tag--cyan{color:var(--cyan);border-color:rgba(37,230,211,.34);background:rgba(37,230,211,.08)}
.tag--orange{color:var(--orange);border-color:rgba(255,138,61,.36);background:rgba(255,138,61,.09)}
.tag--green{color:var(--green);border-color:rgba(61,220,151,.34);background:rgba(61,220,151,.08)}
.tag--red{color:var(--red);border-color:rgba(255,92,122,.36);background:rgba(255,92,122,.09)}

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 26px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  letter-spacing:.08em;
  cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.btn--primary{
  background:linear-gradient(120deg,var(--cyan) 0%,#12B9C9 58%,#0E8FA8 100%);
  color:#04121A;
  box-shadow:0 18px 36px -20px rgba(37,230,211,.95);
}
.btn--primary:hover{transform:translateY(-2px)}
.btn--accent{
  background:linear-gradient(120deg,var(--orange) 0%,#FF6A2B 100%);
  color:#1A0A02;
  box-shadow:0 18px 36px -20px rgba(255,138,61,.95);
}
.btn--accent:hover{transform:translateY(-2px)}
.btn--ghost{
  background:rgba(20,38,92,.5);
  border-color:var(--line);
  color:var(--white);
}
.btn--ghost:hover{border-color:var(--line-strong);color:var(--cyan);transform:translateY(-2px)}
.btn--quiet{
  padding:8px 0;
  border-radius:0;
  background:none;
  color:var(--cyan);
  letter-spacing:.12em;
}
.btn--quiet::after{content:"→";transition:transform .25s var(--ease)}
.btn--quiet:hover::after{transform:translateX(5px)}

/* ---------- 12. 图片容器（页面阶段放入 <img class="media__img">） ---------- */
.media{
  position:relative;
  width:100%;
  aspect-ratio:16/9;
  border-radius:var(--radius-l);
  border:1px solid var(--line);
  overflow:hidden;
  background:linear-gradient(150deg,rgba(20,38,92,.92) 0%,rgba(7,11,26,.94) 100%);
}
.media--portrait{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media--wide{aspect-ratio:21/9}
.media__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media__grid{
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.65;
  background-image:
    linear-gradient(rgba(168,180,216,.10) 1px,transparent 1px),
    linear-gradient(90deg,rgba(168,180,216,.10) 1px,transparent 1px);
  background-size:48px 48px,48px 48px;
}
.media__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:16px 18px 14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--white);
  background:linear-gradient(180deg,rgba(7,11,26,0) 0%,rgba(7,11,26,.9) 100%);
}

/* ---------- 13. 正文与目录 ---------- */
.prose{
  max-width:40em;
  font-size:17px;
  line-height:1.85;
  color:rgba(244,247,255,.88);
}
.prose p{margin-bottom:1.1em}
.prose h2{margin:1.6em 0 .6em;font-size:26px}
.prose h3{margin:1.4em 0 .5em;font-size:20px}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.2em}
.prose ul li{list-style:disc}
.prose ol li{list-style:decimal}
.prose li{margin-bottom:.4em}
.prose strong{color:var(--white)}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(37,230,211,.4)}

.toc{
  padding:22px;
  border-radius:var(--radius-m);
  border:1px solid var(--line);
  background:rgba(13,22,51,.5);
}
.toc__title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--silver);
}
.toc__list{display:grid;gap:10px;margin-top:16px}
.toc__link{
  display:block;
  padding-left:14px;
  border-left:1px solid rgba(168,180,216,.22);
  font-size:14px;
  line-height:1.6;
  color:var(--silver);
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.toc__link:hover,
.toc__link[aria-current="true"]{color:var(--cyan);border-left-color:var(--cyan)}

/* ---------- 14. 渐显动效 ---------- */
.js .reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
.js .reveal.is-visible{opacity:1;transform:none}

/* ---------- 15. 降低动效 ---------- */
@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 .reveal{opacity:1;transform:none}
  .reading-progress__bar{transition:none}
}