/* =========================================================
   银河指南 · 共享站点样式 /assets/site.css
   1 重置与令牌  2 基础排版  3 通用组件
   4 头部与轨道  5 页脚与返回顶部  6 响应式  7 动效降级
   ========================================================= */

/* ---------- 1 重置与令牌 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
img,svg{display:block;max-width:100%;}
input{font:inherit;}

:root{
  --void:#070D1C;
  --deep:#0B1B3A;
  --orbit:#16234A;
  --moon:#F2F5FF;
  --mist:#A7B3D1;
  --nebula:#6C5CE7;
  --lilac:#B4A8FF;
  --aurora:#00D2C6;
  --ember:#FF8A3D;
  --amber:#FFC46B;
  --paper:#FFFFFF;
  --teal-deep:#063B45;
  --line:1px solid rgba(180,168,255,.16);
  --line-strong:1px solid rgba(180,168,255,.3);
  --r-lg:28px;
  --r-md:20px;
  --r-sm:14px;
  --rail:104px;
  --bar:68px;
  --sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow:0 30px 70px -40px rgba(0,0,0,.95);
}

:focus-visible{outline:2px solid var(--aurora);outline-offset:3px;border-radius:8px;}
::selection{background:var(--nebula);color:var(--paper);}
[id]{scroll-margin-top:calc(var(--bar) + 28px);}

/* ---------- 2 基础排版 ---------- */
body{
  min-height:100vh;
  padding-left:0;
  background-color:var(--deep);
  background-image:
    radial-gradient(940px 620px at 8% -12%,rgba(108,92,231,.30),transparent 66%),
    radial-gradient(780px 540px at 94% 4%,rgba(0,210,198,.14),transparent 62%),
    radial-gradient(1200px 820px at 50% 118%,rgba(6,59,69,.58),transparent 70%);
  background-attachment:fixed;
  color:var(--moon);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{line-height:1.22;font-weight:800;letter-spacing:-.01em;}
h1{font-size:clamp(40px,7vw,88px);letter-spacing:-.02em;}
h2{font-size:clamp(28px,3.6vw,40px);}
h3{font-size:clamp(20px,2.2vw,24px);font-weight:700;}
p{color:var(--mist);}
strong{color:var(--moon);font-weight:700;}

/* ---------- 3 通用组件 ---------- */
.ys-skip{
  position:absolute;left:12px;top:-84px;z-index:400;
  padding:12px 22px;border-radius:0 0 16px 16px;
  background:var(--aurora);color:#04121A;
  font-family:var(--mono);font-size:13px;letter-spacing:.12em;font-weight:700;
  transition:top .2s var(--ease);
}
.ys-skip:focus-visible{top:0;}

.ys-main{display:block;}
.ys-wrap{width:100%;max-width:1360px;margin:0 auto;padding:0 clamp(16px,3vw,40px);}
.ys-section{position:relative;padding:clamp(40px,6vw,84px) 0;}
.ys-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.22em;
  color:var(--aurora);text-transform:uppercase;
}
.ys-eyebrow::before{content:"";width:24px;height:1px;background:linear-gradient(90deg,var(--aurora),transparent);}

.ys-grid{display:grid;gap:clamp(18px,2.6vw,32px);}

.ys-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;border:1px solid transparent;
  font-size:14.5px;font-weight:700;letter-spacing:.02em;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.ys-btn--ember{
  background:linear-gradient(120deg,var(--ember),#FFB077);
  color:#21100A;
  box-shadow:0 14px 32px -18px rgba(255,138,61,.95);
}
.ys-btn--ember:hover{transform:translateY(-2px);box-shadow:0 20px 36px -16px rgba(255,138,61,.95);}
.ys-btn--ghost{border-color:rgba(180,168,255,.34);background:rgba(22,35,74,.5);color:var(--moon);}
.ys-btn--ghost:hover{border-color:var(--aurora);color:var(--aurora);transform:translateY(-2px);}

.ys-crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:16px 0;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;color:var(--mist);
}
.ys-crumbs__link{color:var(--mist);transition:color .18s var(--ease);}
.ys-crumbs__link:hover{color:var(--lilac);}
.ys-crumbs__sep{color:rgba(167,179,209,.45);}
.ys-crumbs__current{color:var(--moon);}

.ys-media{
  position:relative;overflow:hidden;
  aspect-ratio:var(--ratio,16/9);
  border-radius:var(--r-lg);
  border:1px solid rgba(180,168,255,.2);
  background:linear-gradient(150deg,#0E1E42,#132A55 45%,#063B45);
}
.ys-media__frame{
  position:absolute;inset:0;
  background-image:
    radial-gradient(circle at 28% 30%,rgba(108,92,231,.42),transparent 62%),
    radial-gradient(circle at 76% 72%,rgba(0,210,198,.26),transparent 64%);
}
.ys-media img{width:100%;height:100%;object-fit:cover;}

.ys-toc{
  position:sticky;top:calc(var(--bar) + 24px);
  display:flex;flex-direction:column;gap:2px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;
}
.ys-toc__link{
  display:block;padding:9px 14px;
  border-left:2px solid rgba(180,168,255,.18);
  color:var(--mist);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.ys-toc__link:hover{color:var(--moon);border-left-color:var(--lilac);}
.ys-toc__link[aria-current="true"]{
  color:var(--aurora);border-left-color:var(--aurora);
  background:linear-gradient(90deg,rgba(0,210,198,.1),transparent);
}

/* ---------- 4 头部与轨道 ---------- */
.ys-header{position:sticky;top:0;z-index:70;}

.ys-topbar{
  background:rgba(7,13,28,.86);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid rgba(180,168,255,.16);
}
.ys-topbar__inner{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  height:var(--bar);
  max-width:1360px;margin:0 auto;
  padding:0 clamp(14px,2.4vw,36px);
}

.ys-brand{display:flex;align-items:center;gap:12px;min-width:0;}
.ys-brand__mark{
  display:none;place-items:center;
  width:36px;height:36px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(145deg,var(--nebula),var(--aurora));
  color:#050B18;font-weight:800;font-size:15px;
}
.ys-brand__text{display:flex;flex-direction:column;min-width:0;}
.ys-brand__name{font-size:17px;font-weight:800;letter-spacing:.02em;color:var(--moon);line-height:1.2;}
.ys-brand__tag{
  margin-top:3px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;
  color:var(--mist);line-height:1.2;white-space:nowrap;
}

.ys-tools{display:flex;align-items:center;gap:8px;flex:0 0 auto;}

.ys-searchbtn{
  display:inline-flex;align-items:center;gap:9px;
  height:38px;padding:0 16px;border-radius:999px;
  border:var(--line-strong);background:rgba(22,35,74,.55);
  color:var(--mist);
  font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.ys-searchbtn:hover{border-color:var(--lilac);color:var(--moon);background:rgba(108,92,231,.22);}
.ys-searchbtn[aria-expanded="true"]{border-color:var(--aurora);color:var(--aurora);background:rgba(0,210,198,.14);}
.ys-searchbtn__icon{
  position:relative;width:11px;height:11px;flex:0 0 auto;
  border:1.8px solid currentColor;border-radius:50%;
}
.ys-searchbtn__icon::after{
  content:"";position:absolute;right:-5px;bottom:-3px;
  width:6px;height:1.8px;border-radius:2px;
  background:currentColor;transform:rotate(45deg);
}

.ys-version{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;
  color:var(--amber);border:1px dashed rgba(255,196,107,.45);
  border-radius:999px;padding:5px 11px;white-space:nowrap;
}

.ys-pill{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;
  border-radius:999px;
  background:linear-gradient(120deg,var(--ember),#FFAF6B);
  color:#20100A;font-size:13.5px;font-weight:700;letter-spacing:.02em;
  box-shadow:0 10px 26px -14px rgba(255,138,61,.95);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.ys-pill:hover{transform:translateY(-1px);box-shadow:0 16px 32px -14px rgba(255,138,61,.95);}

.ys-navtoggle,.ys-rail__close{
  display:none;align-items:center;gap:8px;
  height:38px;padding:0 15px;border-radius:999px;
  border:var(--line-strong);background:rgba(22,35,74,.6);
  color:var(--moon);
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.ys-navtoggle{border:var(--line-strong);}
.ys-navtoggle:hover,.ys-rail__close:hover{border-color:var(--aurora);color:var(--aurora);}
.ys-navtoggle__bars{position:relative;display:block;width:14px;height:10px;flex:0 0 auto;}
.ys-navtoggle__bars::before,.ys-navtoggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:1.8px;border-radius:2px;
  background:currentColor;
  transition:transform .3s var(--ease),opacity .2s var(--ease);
}
.ys-navtoggle__bars::before{top:0;}
.ys-navtoggle__bars::after{bottom:0;}
[aria-expanded="true"] .ys-navtoggle__bars::before{transform:translateY(4px) rotate(45deg);}
[aria-expanded="true"] .ys-navtoggle__bars::after{transform:translateY(-4px) rotate(-45deg);}

.ys-progress{height:2px;background:rgba(180,168,255,.12);overflow:hidden;}
.ys-progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--nebula),var(--aurora) 62%,var(--amber));
  transition:width .12s linear;
}

.ys-searchpanel{
  position:absolute;left:0;right:0;top:100%;z-index:65;
  display:grid;grid-template-columns:1.15fr 1fr;gap:clamp(16px,3vw,36px);
  padding:24px clamp(16px,3vw,40px) 28px;
  background:linear-gradient(180deg,#101F44,#0B1B3A);
  border-bottom:1px solid rgba(180,168,255,.22);
  box-shadow:var(--shadow);
  animation:ysDrop .28s var(--ease);
}
.ys-searchpanel[hidden],.ys-scrim[hidden]{display:none;}
.ys-searchpanel__label{
  margin-bottom:12px;
  font-family:var(--mono);font-size:11px;letter-spacing:.22em;
  color:var(--aurora);text-transform:uppercase;
}
.ys-chiprow{display:flex;flex-wrap:wrap;gap:8px;}
.ys-chip{
  display:inline-flex;align-items:center;height:34px;padding:0 15px;
  border-radius:999px;border:1px solid rgba(180,168,255,.26);
  background:rgba(108,92,231,.14);color:var(--moon);font-size:13px;
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.ys-chip:hover{border-color:var(--aurora);color:var(--aurora);background:rgba(0,210,198,.12);}
.ys-quicklist{display:flex;flex-direction:column;gap:2px;}
.ys-quicklist__link{
  display:flex;align-items:center;gap:10px;
  padding:9px 12px;border-radius:12px;
  color:var(--mist);font-size:14px;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.ys-quicklist__link::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--nebula);flex:0 0 auto;
}
.ys-quicklist__link:hover{background:rgba(108,92,231,.18);color:var(--moon);}

.ys-rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail);z-index:90;
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:16px 0 14px;
  background:linear-gradient(180deg,#0A1226,#070D1C 52%,#0B1B3A);
  border-right:1px solid rgba(180,168,255,.16);
  overflow-y:auto;overscroll-behavior:contain;
}
.ys-rail::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:
    radial-gradient(1.6px 1.6px at 24% 12%,rgba(242,245,255,.9),transparent 62%),
    radial-gradient(1.4px 1.4px at 70% 26%,rgba(0,210,198,.85),transparent 62%),
    radial-gradient(1.8px 1.8px at 38% 58%,rgba(180,168,255,.8),transparent 62%),
    radial-gradient(1.3px 1.3px at 76% 78%,rgba(255,196,107,.8),transparent 62%),
    radial-gradient(1.5px 1.5px at 30% 92%,rgba(242,245,255,.6),transparent 62%);
}
.ys-rail__mark{
  flex:0 0 auto;display:grid;place-items:center;
  width:46px;height:46px;border-radius:15px;
  background:linear-gradient(145deg,var(--nebula),#3B2FB8 55%,var(--aurora));
  color:#050B18;font-weight:800;font-size:18px;line-height:1;
  box-shadow:0 0 0 1px rgba(180,168,255,.35),0 14px 28px -16px rgba(108,92,231,.95);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.ys-rail__mark:hover{
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(180,168,255,.6),0 18px 32px -14px rgba(0,210,198,.75);
}
.ys-rail__list{
  flex:1 1 auto;display:flex;flex-direction:column;justify-content:center;
  gap:2px;width:100%;
}
.ys-rail__item{width:100%;}
.ys-rail__link{
  position:relative;display:flex;flex-direction:column;align-items:center;gap:8px;
  width:100%;padding:11px 0;
  color:var(--mist);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.ys-rail__link::after{
  content:"";position:absolute;inset:6px 8px;z-index:-1;border-radius:12px;
  background:linear-gradient(90deg,rgba(108,92,231,.22),transparent 78%);
  opacity:0;transition:opacity .2s var(--ease);
}
.ys-rail__link:hover{color:var(--lilac);}
.ys-rail__link:hover::after{opacity:1;}
.ys-rail__num{
  font-family:var(--mono);font-size:10px;letter-spacing:.16em;
  color:rgba(167,179,209,.62);
  transition:color .2s var(--ease);
}
.ys-rail__label{
  writing-mode:vertical-rl;text-orientation:mixed;
  font-size:12.5px;letter-spacing:.18em;line-height:1;
}
.ys-rail__link[aria-current="page"]{color:var(--moon);}
.ys-rail__link[aria-current="page"]::before{
  content:"";position:absolute;left:0;top:16%;bottom:16%;width:3px;
  border-radius:0 3px 3px 0;
  background:var(--nebula);
  box-shadow:0 0 16px rgba(108,92,231,.95);
}
.ys-rail__link[aria-current="page"] .ys-rail__num{color:var(--aurora);}
.ys-rail__meta{flex:0 0 auto;padding-bottom:2px;}
.ys-rail__ver{
  display:inline-block;
  font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;
  color:var(--amber);
  padding:6px 10px;border:1px dashed rgba(255,196,107,.45);border-radius:999px;
  white-space:nowrap;
}

.ys-scrim{
  position:fixed;inset:0;z-index:110;
  background:rgba(4,8,18,.66);
  -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
  animation:ysFade .25s var(--ease);
}

@keyframes ysDrop{from{opacity:0;transform:translateY(-10px);}to{opacity:1;transform:none;}}
@keyframes ysFade{from{opacity:0;}to{opacity:1;}}

/* ---------- 5 页脚与返回顶部 ---------- */
.ys-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(56px,8vw,120px);
  background:linear-gradient(180deg,#080F22,#070D1C 42%,#050A15);
  border-top:1px solid rgba(180,168,255,.18);
}
.ys-footer::before{
  content:"";position:absolute;top:-38%;left:-12%;
  width:640px;height:640px;pointer-events:none;
  background:radial-gradient(circle,rgba(108,92,231,.30),transparent 64%);
}
.ys-footer::after{
  content:"";position:absolute;right:-14%;bottom:-40%;
  width:560px;height:560px;pointer-events:none;
  background:radial-gradient(circle,rgba(0,210,198,.16),transparent 66%);
}
.ys-footer__inner{
  position:relative;z-index:1;
  display:grid;gap:clamp(28px,4vw,48px);
  max-width:1360px;margin:0 auto;
  padding:clamp(44px,6vw,84px) clamp(16px,3vw,40px) 30px;
}
.ys-footer__lead{min-width:0;}
.ys-footer__brand{
  display:inline-flex;align-items:center;gap:12px;
  font-size:clamp(24px,3vw,32px);font-weight:800;letter-spacing:.01em;
  color:var(--moon);
}
.ys-footer__brand::before{
  content:"";width:10px;height:10px;border-radius:50%;
  background:var(--aurora);box-shadow:0 0 18px var(--aurora);
}
.ys-footer__tagline{margin-top:14px;font-size:16px;color:var(--moon);}
.ys-footer__note{margin-top:10px;max-width:34ch;font-size:13.5px;line-height:1.75;color:rgba(167,179,209,.85);}
.ys-footer__lead .ys-btn{margin-top:22px;}

.ys-footer__col{min-width:0;}
.ys-footer__heading{
  margin-bottom:14px;padding-bottom:10px;
  border-bottom:1px solid rgba(180,168,255,.18);
  font-family:var(--mono);font-size:11px;letter-spacing:.22em;
  color:var(--amber);text-transform:uppercase;
}
.ys-footer__links{display:flex;flex-direction:column;gap:9px;font-size:14px;}
.ys-footer__links a{
  display:inline-block;color:var(--mist);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.ys-footer__links a:hover{color:var(--moon);transform:translateX(3px);}

.ys-footer__contact{
  display:grid;gap:12px;
  padding:22px 24px;border-radius:24px;
  border:1px solid rgba(180,168,255,.18);
  background:linear-gradient(125deg,rgba(6,59,69,.55),rgba(22,35,74,.5));
}
.ys-footer__row{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;min-width:0;}
.ys-footer__label{
  width:100%;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;
  color:var(--aurora);
}
.ys-footer__value{font-size:13.5px;color:var(--moon);word-break:break-all;}
.ys-copy{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;
  padding:4px 11px;border-radius:999px;
  border:1px solid rgba(180,168,255,.3);color:var(--mist);
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.ys-copy:hover{color:var(--aurora);border-color:var(--aurora);}
.ys-copy[data-done]{background:var(--aurora);border-color:var(--aurora);color:#04121A;}

.ys-footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-top:18px;border-top:1px solid rgba(180,168,255,.14);
}
.ys-footer__icp{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;
  color:rgba(167,179,209,.8);
}
.ys-footer__home{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;
  color:var(--lilac);transition:color .18s var(--ease);
}
.ys-footer__home:hover{color:var(--aurora);}

.ys-backtop{
  position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom,0px));z-index:60;
  display:inline-flex;align-items:center;gap:9px;
  padding:11px 17px;border-radius:999px;
  border:var(--line-strong);
  background:rgba(11,27,58,.92);
  color:var(--moon);
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.ys-backtop[data-visible]{opacity:1;transform:none;pointer-events:auto;}
.ys-backtop:hover{border-color:var(--aurora);color:var(--aurora);}
.ys-backtop::before{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--aurora);box-shadow:0 0 12px var(--aurora);
}

/* ---------- 6 响应式 ---------- */
@media (min-width:900px){
  .ys-grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr);}
  .ys-footer__inner{
    grid-template-columns:minmax(250px,4fr) minmax(0,6fr);
    grid-template-areas:"lead cols" "contact contact" "bottom bottom";
  }
  .ys-footer__lead{grid-area:lead;}
  .ys-footer__cols{grid-area:cols;}
  .ys-footer__contact{grid-area:contact;}
  .ys-footer__bottom{grid-area:bottom;}
}
@media (min-width:760px){
  .ys-footer__contact{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;align-items:start;}
}
@media (min-width:1024px){
  body{padding-left:var(--rail);}
  .ys-skip{left:calc(var(--rail) + 12px);}
  .ys-backtop{right:28px;bottom:28px;}
  .ys-brand__mark{display:none;}
  .ys-scrim{display:none;}
}
@media (max-width:1023px){
  .ys-brand__mark{display:grid;}
  .ys-navtoggle{display:inline-flex;}
  .ys-rail{
    top:0;right:0;bottom:0;left:auto;
    width:min(84vw,352px);
    align-items:stretch;gap:12px;
    padding:18px 18px calc(18px + env(safe-area-inset-bottom,0px));
    border-right:0;border-left:1px solid rgba(180,168,255,.22);
    background:linear-gradient(180deg,#0A1226,#070D1C 60%,#0B1B3A);
    transform:translateX(102%);
    transition:transform .4s var(--ease);
    z-index:120;
    box-shadow:-30px 0 70px -40px rgba(0,0,0,.98);
  }
  .ys-rail[data-open]{transform:translateX(0);}
  .ys-rail::before{display:none;}
  .ys-rail__mark{align-self:flex-start;}
  .ys-rail__close{display:inline-flex;align-self:flex-end;}
  .ys-rail__list{flex:0 0 auto;justify-content:flex-start;gap:4px;padding:6px 0;overflow:visible;}
  .ys-rail__link{
    flex-direction:row;align-items:center;justify-content:flex-start;gap:14px;
    padding:14px;border-radius:14px;
  }
  .ys-rail__link::after{inset:0;border-radius:14px;background:rgba(108,92,231,.18);}
  .ys-rail__num{font-size:11px;min-width:22px;}
  .ys-rail__label{writing-mode:horizontal-tb;font-size:15.5px;letter-spacing:.04em;}
  .ys-rail__link[aria-current="page"]::before{
    left:0;top:22%;bottom:22%;width:3px;border-radius:3px;
  }
  .ys-rail__meta{align-self:flex-start;margin-top:auto;}
  html.ys-nav-open,html.ys-nav-open body{overflow:hidden;}
}
@media (max-width:899px){
  .ys-searchpanel{grid-template-columns:1fr;gap:18px;}
}
@media (max-width:767px){
  .ys-version{display:none;}
  .ys-searchbtn{padding:0 13px;font-size:11px;}
  .ys-footer__cols{grid-template-columns:repeat(auto-fit,minmax(128px,1fr));gap:22px;}
}
@media (max-width:639px){
  .ys-brand__tag{display:none;}
  .ys-pill{display:none;}
  .ys-footer__contact{padding:18px;}
  .ys-backtop{right:12px;padding:10px 14px;}
}

/* ---------- 7 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}