/* ==========================================================================
   云顶娱乐 · 全站共享样式 /assets/site.css
   展览画册式骨架：奶油纸底 + 深空蓝结构 + 云顶金索引 + 青绿行动
   ========================================================================== */

/* ---------- 01 reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:132px}
body{margin:0;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
main{display:block}
::selection{background:var(--sky-gold-soft);color:var(--sky-ink-blue)}

/* ---------- 02 变量 ---------- */
:root{
  --sky-paper:#F7F2E8;
  --sky-parchment:#EFE6D4;
  --sky-card:#FFFDF8;
  --sky-ink-blue:#0E1B36;
  --sky-blue-2:#1B2E55;
  --sky-ink:#241C15;
  --sky-gold:#D9A441;
  --sky-gold-soft:#F0DCAE;
  --sky-teal:#0F9E8A;
  --sky-teal-deep:#0A7265;
  --sky-rust:#C2452D;
  --sky-mist:#7F92AE;

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

  --sky-rail:220px;
  --sky-radius:14px;
  --sky-line:rgba(14,27,54,.14);
  --sky-line-gold:rgba(217,164,65,.5);
  --sky-cream-text:rgba(247,242,232,.82);
  --sky-ease:cubic-bezier(.2,.6,.3,1);
}

/* ---------- 03 基础排版 ---------- */
body{
  font-family:var(--sky-font-body);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  color:var(--sky-ink);
  background-color:var(--sky-paper);
  background-image:
    radial-gradient(1100px 460px at 10% -10%, rgba(217,164,65,.16), transparent 62%),
    radial-gradient(900px 420px at 94% 2%, rgba(127,146,174,.16), transparent 68%);
  background-repeat:no-repeat;
}
h1,h2,h3,h4{
  font-family:var(--sky-font-title);
  font-weight:900;
  letter-spacing:.04em;
  color:var(--sky-ink-blue);
  line-height:1.22;
}
h1{font-size:clamp(30px,4.4vw,40px);line-height:1.2}
h2{font-size:clamp(23px,2.8vw,28px);line-height:1.3}
h3{font-size:clamp(18px,2vw,20px);line-height:1.5}
p{max-width:38em}
strong{font-weight:700;color:var(--sky-ink-blue)}
a{transition:color .18s var(--sky-ease),border-color .18s var(--sky-ease),background-color .18s var(--sky-ease)}

/* ---------- 04 通用工具 ---------- */
.sky-shell{width:100%;max-width:1280px;margin-inline:auto;padding-inline:clamp(18px,4vw,32px)}
.sky-visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
.sky-index{font-family:var(--sky-font-mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--sky-mist)}
.sky-rule{height:1px;border:0;margin:0;background:linear-gradient(90deg,rgba(217,164,65,.75),rgba(217,164,65,0))}
.sky-kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--sky-font-mono);font-size:11.5px;
  letter-spacing:.22em;text-transform:uppercase;color:var(--sky-gold);
}
.sky-kicker::before{content:"";width:26px;height:1px;background:currentColor;flex:none}
.sky-lede{font-size:17px;line-height:1.85;color:var(--sky-ink);max-width:34em}

/* ---------- 05 跳转链接 ---------- */
.sky-skip{
  position:fixed;top:14px;left:14px;z-index:200;
  display:inline-flex;align-items:center;
  padding:10px 18px;border-radius:999px;
  background:var(--sky-ink-blue);color:var(--sky-paper);
  font-size:14px;font-weight:700;letter-spacing:.02em;
  box-shadow:0 10px 24px rgba(14,27,54,.28);
  transform:translateY(-180%);
  transition:transform .18s ease-out;
}
.sky-skip:focus,.sky-skip:focus-visible{transform:translateY(0);outline:2px solid var(--sky-teal);outline-offset:3px}

/* ---------- 06 头部 ---------- */
.sky-header{position:sticky;top:0;z-index:80;isolation:isolate}

.sky-header__meta{
  background:var(--sky-ink-blue);
  color:rgba(247,242,232,.76);
  border-bottom:1px solid rgba(217,164,65,.35);
}
.sky-header__meta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:38px;padding-block:6px;
}
.sky-header__tagline{
  display:flex;align-items:center;gap:10px;
  font-size:12.5px;line-height:1.6;letter-spacing:.06em;max-width:none;
}
.sky-header__tagline::before{
  content:"";flex:none;width:6px;height:6px;border-radius:50%;
  background:var(--sky-gold);box-shadow:0 0 0 3px rgba(217,164,65,.18);
}
.sky-lang{
  display:flex;align-items:center;gap:8px;flex:none;
  font-family:var(--sky-font-mono);font-size:11.5px;
  letter-spacing:.16em;text-transform:uppercase;
  color:rgba(247,242,232,.46);
}
.sky-lang__opt{padding-bottom:1px;border-bottom:1px solid transparent}
.sky-lang__opt.is-current{color:var(--sky-gold);border-bottom-color:var(--sky-gold)}
.sky-lang__sep{opacity:.4}

.sky-header__bar{
  position:relative;
  background:var(--sky-card);
  border-bottom:1px solid var(--sky-line-gold);
  box-shadow:0 1px 0 rgba(14,27,54,.05);
}
.sky-header__bar-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;min-height:76px;padding-block:12px;
}

.sky-brand{display:inline-flex;align-items:center;gap:12px;min-height:44px}
.sky-brand__mark{
  position:relative;flex:none;width:38px;height:38px;border-radius:11px;
  background:linear-gradient(155deg,#1B2E55,#0E1B36 62%);
  border:1px solid rgba(217,164,65,.55);
  transition:transform .18s var(--sky-ease),border-color .18s var(--sky-ease);
}
.sky-brand__mark::before{
  content:"";position:absolute;left:9px;right:9px;top:9px;height:6px;
  border-radius:99px;background:var(--sky-gold);
}
.sky-brand__mark::after{
  content:"";position:absolute;left:9px;right:9px;bottom:9px;height:6px;
  border-radius:99px;background:var(--sky-teal);opacity:.9;
}
.sky-brand:hover .sky-brand__mark{transform:translateY(-2px);border-color:var(--sky-gold)}
.sky-brand__text{display:flex;flex-direction:column;gap:3px;line-height:1.15}
.sky-brand__name{
  font-family:var(--sky-font-title);font-weight:900;font-size:19px;
  letter-spacing:.06em;color:var(--sky-ink-blue);
}
.sky-brand__sub{
  font-family:var(--sky-font-mono);font-size:10.5px;
  letter-spacing:.2em;text-transform:uppercase;color:var(--sky-mist);
}

.sky-navtoggle{
  display:none;align-items:center;gap:10px;
  min-height:44px;padding:10px 16px;
  border:1px solid rgba(14,27,54,.2);border-radius:999px;
  background:var(--sky-paper);color:var(--sky-ink-blue);
  font-size:14px;font-weight:700;letter-spacing:.04em;
  transition:background-color .18s var(--sky-ease),color .18s var(--sky-ease),border-color .18s var(--sky-ease);
}
.sky-navtoggle__bars{display:grid;gap:4px;width:18px;flex:none}
.sky-navtoggle__bars i{
  display:block;height:2px;border-radius:2px;background:var(--sky-ink-blue);
  transition:transform .18s var(--sky-ease),opacity .18s var(--sky-ease),background-color .18s var(--sky-ease);
}
.sky-navtoggle__label{white-space:nowrap}
.sky-header[data-open] .sky-navtoggle{background:var(--sky-ink-blue);color:var(--sky-paper);border-color:var(--sky-ink-blue)}
.sky-header[data-open] .sky-navtoggle__bars i{background:var(--sky-gold)}
.sky-header[data-open] .sky-navtoggle__bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.sky-header[data-open] .sky-navtoggle__bars i:nth-child(2){opacity:0}
.sky-header[data-open] .sky-navtoggle__bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.sky-nav__list{display:flex;align-items:center;gap:2px}
.sky-nav__item{display:block}
.sky-nav__link{
  position:relative;display:inline-flex;align-items:center;
  padding:10px 14px;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--sky-ink);
  transition:background-color .18s var(--sky-ease),color .18s var(--sky-ease);
}
.sky-nav__link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--sky-gold);transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--sky-ease);
}
.sky-nav__link:hover{background:var(--sky-parchment);color:var(--sky-ink-blue)}
.sky-nav__link:hover::after{transform:scaleX(1)}
.sky-nav__link[aria-current="page"]{color:var(--sky-ink-blue);font-weight:800;background:rgba(240,220,174,.4)}
.sky-nav__link[aria-current="page"]::after{transform:scaleX(1)}

/* ---------- 07 页脚 ---------- */
.sky-footer{
  margin-top:clamp(56px,8vw,104px);
  padding-block:clamp(44px,6vw,72px) 0;
  background:
    radial-gradient(120% 92% at 88% 0%, rgba(27,46,85,.9), transparent 64%),
    var(--sky-ink-blue);
  color:var(--sky-cream-text);
  border-top:3px solid var(--sky-gold);
}
.sky-footer__grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.25fr;
  gap:clamp(24px,3vw,40px);
  padding-bottom:clamp(30px,4vw,48px);
}
.sky-footer__brand{display:flex;flex-direction:column;gap:16px;align-items:flex-start}
.sky-brand--footer .sky-brand__name{color:var(--sky-paper)}
.sky-brand--footer .sky-brand__sub{color:rgba(247,242,232,.5)}
.sky-footer__note{font-size:14px;line-height:1.9;color:rgba(247,242,232,.68);max-width:24em}
.sky-footer__meta{
  font-family:var(--sky-font-mono);font-size:10.5px;
  letter-spacing:.18em;text-transform:uppercase;
  color:rgba(217,164,65,.85);
}
.sky-footer__col{border-left:1px solid rgba(217,164,65,.28);padding-left:clamp(16px,2vw,26px)}
.sky-footer__coltitle{
  font-family:var(--sky-font-mono);font-size:11.5px;
  letter-spacing:.2em;text-transform:uppercase;
  color:var(--sky-gold);margin-bottom:16px;
}
.sky-footer__list{display:grid;gap:6px}
.sky-footer__link{
  display:inline-flex;align-items:center;min-height:34px;
  font-size:14.5px;color:rgba(247,242,232,.86);
  border-bottom:1px solid transparent;
}
.sky-footer__link:hover{color:var(--sky-gold);border-bottom-color:var(--sky-gold)}
.sky-footer__contact-item{display:grid;gap:3px;padding-block:5px}
.sky-footer__label{
  font-family:var(--sky-font-mono);font-size:10px;
  letter-spacing:.18em;text-transform:uppercase;
  color:rgba(247,242,232,.42);
}
.sky-footer__value{
  font-family:var(--sky-font-mono);font-size:13.5px;
  color:rgba(247,242,232,.9);overflow-wrap:anywhere;
}
.sky-footer__legal{border-top:1px solid rgba(217,164,65,.32);padding-block:20px}
.sky-footer__legaltext{
  font-size:12.5px;line-height:1.9;
  color:rgba(247,242,232,.58);max-width:78ch;
}
.sky-footer__base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;
  border-top:1px solid rgba(217,164,65,.18);
  padding-block:16px 22px;
}
.sky-footer__copy{
  font-family:var(--sky-font-mono);font-size:11.5px;
  letter-spacing:.08em;color:rgba(247,242,232,.5);max-width:none;
}

/* ---------- 08 按钮 ---------- */
.sky-btn{
  display:inline-flex;align-items:center;gap:10px;
  min-height:48px;padding:12px 24px;border-radius:999px;
  border:1px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:.02em;
  transition:background-color .18s var(--sky-ease),color .18s var(--sky-ease),
             border-color .18s var(--sky-ease),transform .18s var(--sky-ease);
}
.sky-btn::after{content:"→";font-family:var(--sky-font-mono);font-size:14px;opacity:.85}
.sky-btn--primary{background:var(--sky-teal);color:#fff;border-color:var(--sky-teal)}
.sky-btn--primary:hover{background:var(--sky-teal-deep);border-color:var(--sky-teal-deep);transform:translateY(-2px)}
.sky-btn--ghost{background:transparent;color:var(--sky-ink-blue);border-color:rgba(14,27,54,.32)}
.sky-btn--ghost:hover{background:var(--sky-parchment);border-color:var(--sky-ink-blue);transform:translateY(-2px)}

/* ---------- 09 面包屑 ---------- */
.sky-crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--sky-font-mono);font-size:11.5px;
  letter-spacing:.12em;text-transform:uppercase;color:var(--sky-mist);
}
.sky-crumbs a{color:var(--sky-ink-blue);border-bottom:1px solid transparent;padding-bottom:1px}
.sky-crumbs a:hover{color:var(--sky-teal-deep);border-bottom-color:var(--sky-teal)}
.sky-crumbs__sep{opacity:.55}
.sky-crumbs__current{color:var(--sky-ink)}

/* ---------- 10 左轨布局 ---------- */
.sky-layout{
  display:grid;
  grid-template-columns:var(--sky-rail) minmax(0,1fr);
  gap:clamp(24px,3vw,48px);
  align-items:start;
}
.sky-rail{
  position:sticky;top:132px;
  background:linear-gradient(170deg,var(--sky-blue-2),var(--sky-ink-blue) 72%);
  color:rgba(247,242,232,.78);
  border-radius:var(--sky-radius);
  border:1px solid rgba(217,164,65,.28);
  padding:20px 16px;
}
.sky-rail__head{
  display:block;
  font-family:var(--sky-font-mono);font-size:10.5px;
  letter-spacing:.2em;text-transform:uppercase;
  color:var(--sky-gold);margin-bottom:14px;
}
.sky-rail__list{display:grid;gap:2px}
.sky-rail__link{
  position:relative;display:flex;align-items:baseline;gap:10px;
  padding:10px 10px 10px 12px;border-radius:8px;
  font-size:14.5px;line-height:1.5;color:rgba(247,242,232,.78);
  transition:background-color .18s var(--sky-ease),color .18s var(--sky-ease);
}
.sky-rail__link::before{
  content:attr(data-index);
  font-family:var(--sky-font-mono);font-size:10.5px;
  letter-spacing:.08em;color:rgba(127,146,174,.95);
  transition:color .18s var(--sky-ease);
}
.sky-rail__link::after{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:2px;border-radius:2px;
  background:var(--sky-gold);transform:scaleY(0);transform-origin:top;
  transition:transform .18s var(--sky-ease);
}
.sky-rail__link:hover{background:rgba(217,164,65,.12);color:#fff}
.sky-rail__link:hover::before{color:var(--sky-gold-soft)}
.sky-rail__link.is-active,.sky-rail__link[aria-current="true"]{background:rgba(217,164,65,.16);color:#fff}
.sky-rail__link.is-active::before,.sky-rail__link[aria-current="true"]::before{color:var(--sky-gold)}
.sky-rail__link.is-active::after,.sky-rail__link[aria-current="true"]::after{transform:scaleY(1)}

/* ---------- 11 章节与分区带 ---------- */
.sky-section{padding-block:clamp(56px,7vw,104px)}
.sky-band{padding-block:clamp(48px,6vw,88px);background:var(--sky-parchment)}
.sky-band--ink{
  background:
    radial-gradient(110% 90% at 12% 0%, rgba(27,46,85,.95), transparent 60%),
    var(--sky-ink-blue);
  color:rgba(247,242,232,.82);
}
.sky-band--ink h1,.sky-band--ink h2,.sky-band--ink h3{color:var(--sky-paper)}
.sky-band--ink .sky-lede,.sky-band--ink p{color:rgba(247,242,232,.82)}
.sky-band--ink .sky-kicker{color:var(--sky-gold)}

/* ---------- 12 卡片 / 说明牌 / 标签 ---------- */
.sky-card{
  background:var(--sky-card);
  border:1px solid var(--sky-line);
  border-radius:var(--sky-radius);
  padding:clamp(20px,2.4vw,28px);
  transition:transform .18s var(--sky-ease),border-color .18s var(--sky-ease),box-shadow .18s var(--sky-ease);
}
.sky-card:hover{
  transform:translateY(-2px);
  border-color:rgba(14,27,54,.3);
  box-shadow:0 10px 22px -14px rgba(14,27,54,.4);
}
.sky-plate{
  background:var(--sky-parchment);
  border-left:3px solid var(--sky-gold);
  border-radius:0 12px 12px 0;
  padding:16px 20px;
  font-size:14.5px;line-height:1.85;color:var(--sky-ink);
}
.sky-plate__label{
  display:block;
  font-family:var(--sky-font-mono);font-size:10.5px;
  letter-spacing:.2em;text-transform:uppercase;
  color:var(--sky-rust);margin-bottom:6px;
}
.sky-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  font-family:var(--sky-font-mono);font-size:11px;
  letter-spacing:.12em;text-transform:uppercase;
  background:var(--sky-gold-soft);color:#6A4B12;
  border:1px solid rgba(217,164,65,.6);
}
.sky-tag--rust{background:rgba(194,69,45,.1);color:var(--sky-rust);border-color:rgba(194,69,45,.42)}
.sky-tag--teal{background:rgba(15,158,138,.1);color:var(--sky-teal-deep);border-color:rgba(15,158,138,.42)}

/* ---------- 13 图片容器基础 ---------- */
.sky-figure{
  margin:0;overflow:hidden;
  border-radius:16px;
  border:1px solid var(--sky-line);
  background:var(--sky-parchment);
}
.sky-figure__media{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;width:100%;
  background:
    radial-gradient(120% 80% at 50% 118%, rgba(217,164,65,.24), transparent 62%),
    linear-gradient(180deg,#0E1B36 0%,#16294B 54%,#294066 100%);
}
.sky-figure__media::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(240,220,174,.12) 1px,transparent 1px),
    linear-gradient(90deg,rgba(240,220,174,.12) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.75),transparent 78%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.75),transparent 78%);
}
.sky-figure__media::after{
  content:"";position:absolute;left:-8%;right:-8%;bottom:-4%;height:48%;
  border-radius:50% 50% 0 0/72% 72% 0 0;
  background:
    radial-gradient(62% 100% at 22% 100%, rgba(247,242,232,.22), transparent 72%),
    radial-gradient(70% 100% at 74% 100%, rgba(247,242,232,.13), transparent 74%);
}
.sky-figure__media img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.sky-figure__caption{
  padding:12px 18px;font-size:13px;line-height:1.75;
  color:var(--sky-ink);background:var(--sky-card);
  border-top:1px solid rgba(14,27,54,.08);
}
.sky-figure--wide .sky-figure__media{aspect-ratio:21/9}
.sky-figure--square .sky-figure__media{aspect-ratio:1/1}

/* ---------- 14 折叠面板 ---------- */
.sky-panel{
  border:1px solid var(--sky-line);
  border-radius:12px;
  background:var(--sky-card);
  overflow:hidden;
}
.sky-panel + .sky-panel{margin-top:10px}
.sky-panel__trigger{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;min-height:56px;padding:18px 20px;
  text-align:left;
  font-family:var(--sky-font-body);font-size:16px;font-weight:700;
  color:var(--sky-ink-blue);background:var(--sky-parchment);
  transition:background-color .18s var(--sky-ease);
}
.sky-panel__trigger::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--sky-rust);transform:scaleY(0);transform-origin:top;
  transition:transform .18s var(--sky-ease);
}
.sky-panel__trigger::after{
  content:"+";flex:none;
  font-family:var(--sky-font-mono);font-size:18px;line-height:1;
  color:var(--sky-mist);
  transition:color .18s var(--sky-ease);
}
.sky-panel__trigger:hover{background:var(--sky-gold-soft)}
.sky-panel__trigger[aria-expanded="true"]{background:var(--sky-card)}
.sky-panel__trigger[aria-expanded="true"]::before{transform:scaleY(1)}
.sky-panel__trigger[aria-expanded="true"]::after{content:"−";color:var(--sky-rust)}
.sky-panel__body{overflow:hidden}
.sky-panel__inner{
  padding:18px 20px 24px;
  font-size:15.5px;line-height:1.85;color:var(--sky-ink);
  border-top:1px solid rgba(14,27,54,.08);
}

/* ---------- 15 滚动进度 ---------- */
.sky-progress{
  position:fixed;left:0;right:0;top:0;z-index:120;
  height:3px;pointer-events:none;
  background:rgba(217,164,65,.16);
}
.sky-progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--sky-teal),var(--sky-gold));
  transition:width .1s linear;
}

/* ---------- 16 焦点 ---------- */
:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--sky-teal);
  outline-offset:2px;
  border-radius:4px;
}
.sky-nav__link:focus-visible,
.sky-navtoggle:focus-visible,
.sky-btn:focus-visible,
.sky-panel__trigger:focus-visible{outline:2px solid var(--sky-teal);outline-offset:2px}

/* ---------- 17 响应式 ---------- */
@media (max-width:1180px){
  :root{--sky-rail:190px}
  .sky-footer__grid{grid-template-columns:1.4fr 1fr 1fr;gap:clamp(20px,3vw,32px)}
  .sky-footer__col--contact{grid-column:1 / -1;border-left:0;padding-left:0;border-top:1px solid rgba(217,164,65,.24);padding-top:18px}
  .sky-footer__col--contact .sky-footer__list{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
}

@media (max-width:900px){
  html{scroll-padding-top:104px}
  .sky-header__meta-inner{min-height:34px}
  .sky-header__tagline{font-size:11.5px;letter-spacing:.02em}
  .sky-lang{font-size:10.5px;letter-spacing:.12em}
  .sky-header__bar-inner{min-height:64px;padding-block:10px;gap:12px}
  .sky-navtoggle{display:inline-flex}
  .sky-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;
    background:var(--sky-card);
    border-top:1px solid var(--sky-line-gold);
    border-bottom:1px solid var(--sky-line-gold);
    box-shadow:0 18px 30px -20px rgba(14,27,54,.5);
    max-height:calc(100vh - 110px);
    overflow-y:auto;
    padding-block:8px 16px;
  }
  .sky-header[data-open] .sky-nav{display:block}
  .sky-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .sky-nav__item{width:100%}
  .sky-nav__link{
    width:100%;justify-content:space-between;
    min-height:48px;padding:14px 22px;border-radius:0;
    border-bottom:1px solid rgba(14,27,54,.07);
  }
  .sky-nav__link::after{left:22px;right:22px;bottom:8px}
  .sky-nav__link[aria-current="page"]{background:rgba(240,220,174,.45)}
  .sky-layout{grid-template-columns:minmax(0,1fr);gap:24px}
  .sky-rail{position:static;padding:14px 12px}
  .sky-rail__head{margin-bottom:10px}
  .sky-rail__list{
    display:flex;gap:8px;overflow-x:auto;
    padding-bottom:6px;scrollbar-width:thin;
    -webkit-overflow-scrolling:touch;
  }
  .sky-rail__link{
    flex:none;white-space:nowrap;
    background:rgba(255,255,255,.06);
    border:1px solid rgba(217,164,65,.22);
    min-height:44px;align-items:center;
  }
  .sky-rail__link::after{display:none}
  .sky-footer__grid{grid-template-columns:1fr 1fr}
  .sky-footer__brand{grid-column:1 / -1}
  .sky-footer__col--contact{grid-column:1 / -1}
  .sky-footer__col--contact .sky-footer__list{grid-template-columns:1fr;gap:8px}
}

@media (max-width:640px){
  body{font-size:16px;line-height:1.8}
  .sky-header__tagline{font-size:11px}
  .sky-brand__mark{width:34px;height:34px}
  .sky-brand__name{font-size:17px}
  .sky-brand__sub{font-size:9.5px;letter-spacing:.16em}
  .sky-footer__grid{grid-template-columns:1fr;gap:24px}
  .sky-footer__col{border-left:0;padding-left:0;border-top:1px solid rgba(217,164,65,.22);padding-top:18px}
  .sky-footer__coltitle{margin-bottom:12px}
  .sky-footer__base{flex-direction:column;align-items:flex-start}
  .sky-panel__trigger{padding:16px 16px;font-size:15px}
  .sky-panel__inner{padding:16px 16px 20px;font-size:15px}
  .sky-btn{width:100%;justify-content:center}
}

/* ---------- 18 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;
    scroll-behavior:auto !important;
  }
  .sky-skip{transition:none}
  .sky-card:hover,
  .sky-btn:hover,
  .sky-brand:hover .sky-brand__mark{transform:none}
}