/* ============================================================
   华体汇体育主站 · 共享样式 /assets/site.css
   深空灰底 + 星光噪点 + 侧边品牌轨道 + 戈壁撞色数据层
   ============================================================ */

/* ---------- 1. RESET ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0;}
ul,ol{list-style:none;}
button{font:inherit;color:inherit;background:none;border:0;}
img,svg,video{max-width:100%;display:block;}
a{color:inherit;}
table{border-collapse:collapse;border-spacing:0;}
h1,h2,h3,h4{line-height:1.22;}

/* ---------- 2. TOKENS ---------- */
:root{
  --ink-900:#0E1522;
  --ink-800:#182234;
  --ink-700:#121B2B;
  --ink-600:#0B111B;
  --gold:#E8A33D;
  --gold-soft:#F7DCA6;
  --lake:#1C8FC4;
  --lake-deep:#0B4F70;
  --pom:#D23A2C;
  --poplar:#2F8F6A;
  --paper:#F6F1E6;
  --paper-deep:#EDE3CF;
  --graphite:#2B3444;
  --star:#EEF4FA;
  --line:rgba(238,244,250,.14);
  --line-soft:rgba(238,244,250,.08);
  --line-gold:rgba(232,163,61,.30);
  --rail-w:264px;
  --pad:clamp(18px,4vw,46px);
  --radius:14px;
  --shadow-card:0 18px 40px rgba(0,0,0,.38);
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","Roboto Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
}
@media (min-width:1440px){ :root{ --rail-w:288px; } }

/* ---------- 3. BASE / 星空底 ---------- */
body{
  position:relative;
  min-height:100vh;
  overflow-x:hidden;
  background-color:var(--ink-900);
  color:var(--star);
  font-family:var(--font-body);
  font-size:clamp(15.5px,1.02vw,17.5px);
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;inset:-8%;z-index:0;pointer-events:none;
  opacity:.85;
  background-image:
    radial-gradient(circle at 12% 18%,rgba(238,244,250,.55) 0 1px,transparent 1.6px),
    radial-gradient(circle at 68% 9%,rgba(247,220,166,.55) 0 1.2px,transparent 1.8px),
    radial-gradient(circle at 32% 62%,rgba(238,244,250,.42) 0 1px,transparent 1.5px),
    radial-gradient(circle at 84% 46%,rgba(28,143,196,.55) 0 1.2px,transparent 1.8px),
    radial-gradient(circle at 52% 84%,rgba(238,244,250,.36) 0 1px,transparent 1.5px),
    radial-gradient(circle at 22% 92%,rgba(232,163,61,.45) 0 1px,transparent 1.5px);
  background-size:620px 620px,540px 540px,480px 480px,700px 700px,560px 560px,640px 640px;
  animation:starDrift 20s ease-in-out infinite alternate;
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.05;
  background-image:
    repeating-linear-gradient(0deg,rgba(255,255,255,.8) 0 1px,transparent 1px 3px),
    repeating-linear-gradient(90deg,rgba(0,0,0,.9) 0 1px,transparent 1px 3px);
  background-size:3px 3px;
}
@keyframes starDrift{
  from{transform:translate3d(0,0,0);}
  to{transform:translate3d(-2px,1px,0);}
}
p{max-width:72ch;}
a{color:var(--lake);text-underline-offset:3px;}

/* ---------- 4. 跳转链接 / 滚动进度 ---------- */
.skip-link{
  position:fixed;top:0;left:0;z-index:120;
  padding:11px 20px;
  background:linear-gradient(135deg,var(--gold-soft),var(--gold));
  color:#1A1205;font-weight:800;font-size:.86rem;text-decoration:none;
  border-radius:0 0 12px 0;
  transform:translateY(-150%);
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0);}
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:110;
  background:rgba(238,244,250,.07);pointer-events:none;
}
.scroll-progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--lake),var(--gold) 62%,var(--pom));
  box-shadow:0 0 14px rgba(232,163,61,.5);
  transition:width .1s linear;
}

/* ---------- 5. 侧边品牌轨道（HEADER） ---------- */
.site-rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:100;
  display:flex;
  background:linear-gradient(180deg,#141E2F 0%,#0E1522 58%,#0A0F18 100%);
  border-right:1px solid var(--line-gold);
  box-shadow:18px 0 44px rgba(0,0,0,.42);
}
.site-rail::before{
  content:"";position:absolute;top:0;right:10px;bottom:0;width:1px;
  background:repeating-linear-gradient(180deg,rgba(28,143,196,.4) 0 6px,transparent 6px 15px);
  opacity:.55;
}
.rail-spine{
  position:absolute;left:11px;top:50%;transform:translateY(-50%);
  writing-mode:vertical-rl;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;
  color:rgba(238,244,250,.3);
  user-select:none;
}
.rail-frame{
  position:relative;z-index:2;
  display:flex;flex-direction:column;gap:18px;
  width:100%;height:100%;
  padding:28px 22px 22px 42px;
  overflow-y:auto;overscroll-behavior:contain;
}
.rail-brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit;}
.rail-brand__mark{
  flex:0 0 auto;width:42px;height:42px;display:grid;place-items:center;
  font-weight:900;font-size:1.32rem;color:#1A1205;line-height:1;
  background:linear-gradient(135deg,var(--gold-soft),var(--gold));
  border-radius:6px 15px 6px 15px;
  box-shadow:0 8px 20px rgba(232,163,61,.32);
}
.rail-brand__text{display:flex;flex-direction:column;gap:2px;min-width:0;}
.rail-brand__name{font-size:1.02rem;font-weight:800;letter-spacing:.02em;}
.rail-brand__domain{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.02em;color:rgba(238,244,250,.5);}
.rail-meta{
  display:flex;flex-direction:column;gap:7px;
  padding-bottom:16px;border-bottom:1px dashed var(--line);
}
.rail-meta__note{font-size:.69rem;line-height:1.6;letter-spacing:.04em;color:rgba(238,244,250,.46);}
.rail-nav{flex:1 1 auto;}
.rail-nav__list{display:flex;flex-direction:column;gap:2px;}
.rail-link{
  position:relative;
  display:flex;align-items:baseline;gap:12px;
  padding:10px 12px 10px 13px;
  border-left:2px solid transparent;border-radius:0 9px 9px 0;
  font-size:.96rem;font-weight:600;text-decoration:none;
  color:rgba(238,244,250,.72);
  transition:color .18s ease,background .18s ease,border-color .18s ease,transform .18s ease;
}
.rail-link:hover{color:var(--star);background:rgba(28,143,196,.14);border-left-color:rgba(28,143,196,.7);transform:translateX(2px);}
.rail-link[aria-current="page"]{
  color:var(--gold-soft);
  background:linear-gradient(90deg,rgba(232,163,61,.22),transparent 76%);
  border-left-color:var(--gold);
  font-weight:800;
}
.rail-link[aria-current="page"]::after{
  content:"";position:absolute;right:10px;top:50%;width:6px;height:6px;margin-top:-3px;
  background:var(--gold);transform:rotate(45deg);
}
.rail-link__num{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;color:var(--gold);}
.rail-link__label{flex:1 1 auto;}
.rail-foot{
  display:flex;flex-direction:column;gap:10px;
  padding-top:16px;border-top:1px dashed var(--line);
}
.rail-cta{width:100%;}
.rail-top{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  width:100%;padding:10px 14px;border-radius:9px;cursor:pointer;
  background:rgba(238,244,250,.05);
  border:1px solid var(--line);
  color:rgba(238,244,250,.7);
  font-size:.8rem;letter-spacing:.12em;font-family:var(--font-mono);
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.rail-top:hover,.rail-top[data-active]{color:var(--gold-soft);border-color:var(--line-gold);background:rgba(232,163,61,.13);}
.rail-top__icon{font-size:.95rem;}

/* ---------- 6. 移动导航按钮 ---------- */
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:9px 15px;border-radius:999px;cursor:pointer;
  border:1px solid var(--line-gold);
  background:rgba(232,163,61,.12);
  color:var(--gold-soft);
  font-size:.78rem;font-weight:700;letter-spacing:.14em;
}
.nav-toggle__icon{position:relative;width:18px;height:2px;border-radius:2px;background:currentColor;transition:background .2s ease;}
.nav-toggle__icon::before,.nav-toggle__icon::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:currentColor;
  transition:transform .24s ease,top .24s ease;
}
.nav-toggle__icon::before{top:-6px;}
.nav-toggle__icon::after{top:6px;}
.site-rail[data-open] .nav-toggle__icon{background:transparent;}
.site-rail[data-open] .nav-toggle__icon::before{top:0;transform:rotate(45deg);}
.site-rail[data-open] .nav-toggle__icon::after{top:0;transform:rotate(-45deg);}

/* ---------- 7. 正文外壳 ---------- */
.site-main{
  position:relative;z-index:1;
  padding-left:var(--rail-w);
  min-height:60vh;
}
.wrap{width:100%;max-width:1240px;margin-inline:auto;padding-inline:var(--pad);}
.wrap--prose{max-width:800px;}
.section{position:relative;padding-block:clamp(46px,7vw,92px);}
.section--deep{background:linear-gradient(180deg,rgba(24,34,52,.86),rgba(14,21,34,.98));}
.section--paper{background:linear-gradient(180deg,var(--paper),var(--paper-deep));color:var(--graphite);}
.section--paper .section-lede{color:#4A5364;}
.section--cut{clip-path:polygon(0 3.2vw,100% 0,100% 100%,0 100%);padding-top:calc(clamp(46px,7vw,92px) + 3vw);}
.seam{
  position:relative;height:clamp(38px,7vw,92px);overflow:hidden;pointer-events:none;
}
.seam::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(232,163,61,.55),rgba(28,143,196,.55));
  clip-path:polygon(0 100%,100% 0,100% 16%,0 100%);
  opacity:.5;
}

/* ---------- 8. 排版组件 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--gold);
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor;opacity:.75;}
.eyebrow--vertical{writing-mode:vertical-rl;letter-spacing:.3em;}
.eyebrow--vertical::before{width:1px;height:26px;}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(1.55rem,3vw,2.45rem);font-weight:900;letter-spacing:-.01em;
}
.section-lede{margin-top:12px;font-size:1.02rem;color:rgba(238,244,250,.72);}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;}
.t-gold{color:var(--gold);}
.t-lake{color:var(--lake);}
.t-poplar{color:var(--poplar);}
.t-pom{color:var(--pom);}
.rule{height:1px;border:0;margin-block:clamp(22px,4vw,42px);background:linear-gradient(90deg,var(--line-gold),transparent);}

/* ---------- 9. 按钮 / 徽标 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border-radius:10px;border:1px solid transparent;
  font-family:inherit;font-size:.94rem;font-weight:800;letter-spacing:.05em;
  text-decoration:none;cursor:pointer;
  transition:transform .18s ease,background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn:hover{transform:translateY(-2px);}
.btn--gold{
  background:linear-gradient(135deg,var(--gold-soft),var(--gold));
  color:#1A1205;box-shadow:0 10px 26px rgba(232,163,61,.28);
}
.btn--lake{background:linear-gradient(135deg,#3FB6E6,var(--lake));color:#04131C;}
.btn--ghost{background:transparent;border-color:var(--line-gold);color:var(--star);}
.btn--ghost:hover{background:rgba(232,163,61,.12);color:var(--gold-soft);}
.badge{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:999px;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;
  border:1px solid var(--line);color:var(--star);background:rgba(238,244,250,.07);
}
.badge--gold{border-color:var(--line-gold);color:var(--gold-soft);background:rgba(232,163,61,.14);}
.badge--lake{border-color:rgba(28,143,196,.5);color:#9AD9F5;background:rgba(28,143,196,.16);}
.badge--poplar{border-color:rgba(47,143,106,.5);color:#8FE0BE;background:rgba(47,143,106,.16);}
.badge--pom{border-color:rgba(210,58,44,.5);color:#F4A79C;background:rgba(210,58,44,.16);}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:7px;
  font-size:.74rem;letter-spacing:.08em;
  border:1px solid var(--line);color:rgba(238,244,250,.78);background:rgba(238,244,250,.05);
}
.tag--gold{border-color:var(--line-gold);color:var(--gold-soft);background:rgba(232,163,61,.13);}
.tag--lake{border-color:rgba(28,143,196,.48);color:#9AD9F5;background:rgba(28,143,196,.15);}
.tag--poplar{border-color:rgba(47,143,106,.48);color:#8FE0BE;background:rgba(47,143,106,.15);}
.tag--pom{border-color:rgba(210,58,44,.48);color:#F4A79C;background:rgba(210,58,44,.15);}

/* ---------- 10. 网格 / 卡片 / 统计 ---------- */
.grid{display:grid;gap:clamp(16px,2.2vw,28px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--sidebar{grid-template-columns:minmax(0,2.2fr) minmax(240px,1fr);align-items:start;}
.card{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(165deg,rgba(24,34,52,.96),rgba(14,21,34,.96));
  box-shadow:var(--shadow-card);
}
.card::before{
  content:"";position:absolute;top:0;left:22px;width:54px;height:3px;
  background:linear-gradient(90deg,var(--gold),transparent);border-radius:0 0 3px 3px;
}
.card--paper{
  background:linear-gradient(170deg,var(--paper),var(--paper-deep));
  color:var(--graphite);border-color:rgba(43,52,68,.16);
}
.card__kicker{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.18em;color:var(--gold);text-transform:uppercase;}
.card__title{margin:8px 0 6px;font-size:1.16rem;font-weight:800;}
.card__text{font-size:.94rem;color:rgba(238,244,250,.72);max-width:60ch;}
.card--paper .card__text{color:#4A5364;}
.stat{display:flex;flex-direction:column;gap:4px;}
.stat__value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(1.7rem,3vw,2.55rem);font-weight:700;line-height:1.1;
  letter-spacing:-.01em;color:var(--gold);
}
.stat__label{font-size:.76rem;letter-spacing:.14em;color:rgba(238,244,250,.55);}

/* ---------- 11. 数据表 ---------- */
.table-scroll{
  position:relative;overflow-x:auto;overscroll-behavior-x:contain;
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--ink-800);
  background-image:
    linear-gradient(90deg,var(--ink-800) 30%,rgba(24,34,52,0)) left center/40px 100% no-repeat local,
    linear-gradient(90deg,rgba(24,34,52,0),var(--ink-800)) right center/40px 100% no-repeat local,
    radial-gradient(farthest-side at 0 50%,rgba(0,0,0,.55),transparent) left center/16px 100% no-repeat scroll,
    radial-gradient(farthest-side at 100% 50%,rgba(0,0,0,.55),transparent) right center/16px 100% no-repeat scroll;
  -webkit-overflow-scrolling:touch;
}
.data-table{width:100%;min-width:720px;font-size:.92rem;}
.data-table th,.data-table td{
  padding:12px 16px;text-align:left;white-space:nowrap;
  border-bottom:1px solid var(--line-soft);
}
.data-table thead th{
  position:sticky;top:0;z-index:2;
  background:#16202F;color:var(--gold-soft);
  font-size:.76rem;font-weight:800;letter-spacing:.12em;
  box-shadow:inset 0 -2px 0 0 var(--gold);
}
.data-table tbody tr:hover{background:rgba(28,143,196,.1);}
.data-table .num{text-align:right;}
.data-table td .num{display:block;}
.data-table caption{
  padding:12px 16px 0;text-align:left;
  font-size:.78rem;letter-spacing:.1em;color:rgba(238,244,250,.5);
}

/* ---------- 12. 图片容器 ---------- */
.media-frame{
  position:relative;display:block;width:100%;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(28,143,196,.28),rgba(232,163,61,.2) 60%,rgba(14,21,34,.9));
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(14,21,34,0) 42%,rgba(14,21,34,.74));
}
.media-frame img{width:100%;height:100%;object-fit:cover;}
.media-frame--wide{aspect-ratio:16/9;}
.media-frame--tall{aspect-ratio:3/4;}
.media-frame--square{aspect-ratio:1/1;}

/* ---------- 13. 面包屑 / 章节目录 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-top:20px;
  font-size:.78rem;letter-spacing:.06em;color:rgba(238,244,250,.52);
}
.breadcrumb a{color:rgba(238,244,250,.74);text-decoration:none;}
.breadcrumb a:hover{color:var(--gold-soft);}
.breadcrumb__sep{font-family:var(--font-mono);color:rgba(238,244,250,.28);}
.chapter-index{
  position:sticky;top:32px;
  display:flex;flex-direction:column;gap:2px;
  padding:16px 0 16px 18px;
  border-left:1px solid var(--line-gold);
}
.chapter-index__title{
  margin-bottom:8px;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.2em;
  color:rgba(238,244,250,.45);
}
.chapter-index__link{
  display:flex;align-items:baseline;gap:10px;
  padding:5px 0;font-size:.86rem;text-decoration:none;
  color:rgba(238,244,250,.62);
  transition:color .18s ease,transform .18s ease;
}
.chapter-index__link:hover{color:var(--star);transform:translateX(3px);}
.chapter-index__link[aria-current]{color:var(--gold-soft);font-weight:800;}
.chapter-index__num{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;color:var(--gold);}

/* ---------- 14. 滚动显现 ---------- */
[data-reveal]{transition:opacity .6s ease,transform .6s ease;}
[data-reveal-state="hidden"]{opacity:0;transform:translateY(16px);}

/* ---------- 15. 页脚 ---------- */
.site-foot{
  position:relative;z-index:1;
  margin-left:var(--rail-w);
  padding-block:clamp(64px,9vw,116px) 28px;
  overflow:hidden;
  border-top:1px solid var(--line-gold);
  background:linear-gradient(180deg,#0E1522 0%,#0B3A52 52%,#061722 100%);
}
.foot-ridge{
  position:absolute;top:0;left:0;right:0;height:134px;pointer-events:none;
  background:linear-gradient(180deg,rgba(232,163,61,.32),rgba(232,163,61,0) 84%);
  clip-path:polygon(0 100%,0 68%,9% 46%,16% 62%,24% 24%,33% 58%,41% 38%,50% 64%,58% 30%,67% 60%,76% 42%,84% 62%,92% 48%,100% 70%,100% 100%);
  opacity:.5;
}
.foot-ridge::before{
  content:"";position:absolute;top:24px;left:0;right:0;bottom:0;
  background:linear-gradient(180deg,rgba(28,143,196,.45),rgba(28,143,196,0) 88%);
  clip-path:polygon(0 100%,0 74%,12% 52%,21% 70%,30% 40%,40% 66%,52% 44%,62% 68%,72% 50%,82% 70%,91% 56%,100% 76%,100% 100%);
  opacity:.75;
}
.foot-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:minmax(220px,1.1fr) 2fr;
  gap:clamp(24px,4vw,56px);
}
.foot-brand__logo{
  display:inline-block;font-size:1.24rem;font-weight:900;letter-spacing:.02em;
  color:var(--star);text-decoration:none;
}
.foot-brand__logo:hover{color:var(--gold-soft);}
.foot-brand__domain{margin-top:6px;font-family:var(--font-mono);font-size:.74rem;color:rgba(238,244,250,.5);}
.foot-brand__meta{
  display:flex;align-items:center;gap:10px;margin-top:16px;
  font-size:.74rem;letter-spacing:.04em;color:rgba(238,244,250,.56);
}
.foot-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px 32px;}
.foot-col__title{
  margin-bottom:14px;padding-bottom:8px;
  font-size:.8rem;font-weight:800;letter-spacing:.18em;color:var(--gold-soft);
  border-bottom:1px dashed rgba(247,220,166,.3);
}
.foot-col ul{display:flex;flex-direction:column;gap:9px;}
.foot-col a{
  display:inline-block;padding-left:0;
  font-size:.92rem;text-decoration:none;color:rgba(238,244,250,.74);
  border-left:2px solid transparent;
  transition:color .18s ease,padding-left .18s ease,border-color .18s ease;
}
.foot-col a:hover{color:var(--star);padding-left:8px;border-left-color:var(--lake);}
.foot-base{
  position:relative;z-index:2;
  display:flex;flex-direction:column;gap:10px;
  margin-top:clamp(28px,4vw,48px);padding-top:20px;
  border-top:1px solid rgba(238,244,250,.12);
}
.foot-contact{display:flex;flex-wrap:wrap;gap:6px 12px;font-size:.85rem;color:rgba(238,244,250,.72);max-width:none;}
.foot-contact__k{font-size:.74rem;letter-spacing:.12em;color:var(--gold-soft);}
.foot-contact__v{font-family:var(--font-mono);color:var(--star);}
.foot-contact__sep{color:rgba(238,244,250,.3);}
.foot-legal,.foot-copy{font-size:.75rem;letter-spacing:.03em;color:rgba(238,244,250,.46);max-width:none;}

/* ---------- 16. 焦点 / 降级动效 ---------- */
:focus-visible{outline:2px solid var(--gold-soft);outline-offset:3px;border-radius:4px;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  body::before{animation:none;}
  [data-reveal-state="hidden"]{opacity:1;transform:none;}
}

/* ---------- 17. 响应式 ---------- */
@media (max-width:1023px){
  .site-rail{
    position:sticky;top:0;left:auto;right:auto;bottom:auto;
    width:100%;height:auto;flex-direction:column;
    border-right:0;border-bottom:1px solid var(--line-gold);
    box-shadow:0 14px 34px rgba(0,0,0,.5);
  }
  .site-rail::before,.rail-spine{display:none;}
  .rail-frame{
    display:grid;
    grid-template-columns:minmax(0,1fr) auto;
    grid-template-areas:
      "brand toggle"
      "meta  meta"
      "nav   nav"
      "foot  foot";
    align-items:center;gap:0 14px;
    height:auto;padding:12px var(--pad) 0;overflow:visible;
  }
  .rail-brand{grid-area:brand;}
  .rail-meta{
    grid-area:meta;flex-direction:row;flex-wrap:wrap;align-items:center;gap:8px 12px;
    padding:6px 0 10px;border-bottom:0;
  }
  .rail-meta__note{font-size:.66rem;}
  .nav-toggle{grid-area:toggle;display:inline-flex;}
  .rail-nav{grid-area:nav;}
  .rail-foot{grid-area:foot;padding-bottom:14px;}
  .rail-nav,.rail-foot{
    max-height:0;overflow:hidden;opacity:0;visibility:hidden;
    transition:max-height .34s ease,opacity .24s ease,visibility .34s ease;
  }
  .site-rail[data-open] .rail-nav{max-height:66vh;overflow-y:auto;opacity:1;visibility:visible;}
  .site-rail[data-open] .rail-foot{max-height:300px;margin-top:10px;opacity:1;visibility:visible;}
  .rail-link{padding:12px;font-size:1rem;}
  .site-main{padding-left:0;}
  .site-foot{margin-left:0;}
  .chapter-index{position:static;padding:14px 0 14px 16px;}
}
@media (max-width:900px){
  .grid--2,.grid--3,.grid--sidebar{grid-template-columns:minmax(0,1fr);}
  .foot-inner{grid-template-columns:minmax(0,1fr);}
}
@media (max-width:600px){
  .foot-cols{grid-template-columns:repeat(2,minmax(0,1fr));}
  .rail-brand__name{font-size:.96rem;}
  .data-table{min-width:600px;font-size:.86rem;}
  .data-table th,.data-table td{padding:10px 12px;}
}