/* ==========================================================================
   开元主站 · 共享样式表 /assets/site.css
   东方典藏 × 现代数字工具：墨蓝 / 宣纸白 / 暖金 / 朱砂红 / 电光青
   ========================================================================== */

:root{
  --ky-ink:#0B1B2B;
  --ky-ink-panel:#12293F;
  --ky-ink-line:#1E3A55;
  --ky-paper:#F5F1E8;
  --ky-paper-2:#E7DFCC;
  --ky-gold:#C9A227;
  --ky-gold-soft:#E3C56A;
  --ky-cinnabar:#B23A2E;
  --ky-cyan:#2FBFA8;
  --ky-text:#3C4B5A;
  --ky-muted:#6B7A88;

  --ky-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --ky-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --ky-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,monospace;

  --ky-shell:1240px;
  --ky-gutter:clamp(16px,4vw,40px);
  --ky-pill:999px;
  --ky-cut:18px;
  --ky-ease:cubic-bezier(.2,.7,.3,1);
  --ky-shadow:0 20px 44px -26px rgba(11,27,43,.7);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--ky-sans);
  font-size:1rem;
  line-height:1.75;
  color:var(--ky-text);
  background-color:var(--ky-paper);
  background-image:
    repeating-linear-gradient(0deg,rgba(11,27,43,.045) 0 1px,transparent 1px 34px),
    repeating-linear-gradient(90deg,rgba(11,27,43,.035) 0 1px,transparent 1px 34px);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0}
[hidden]{display:none !important}
[id]{scroll-margin-top:118px}

:focus-visible{outline:2px solid var(--ky-gold);outline-offset:3px;border-radius:2px}
.ky-header :focus-visible,
.ky-footer :focus-visible,
.ky-section--dark :focus-visible,
.ky-panel--dark :focus-visible{outline-color:var(--ky-gold-soft)}

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

/* ---------- 容器 ---------- */
.ky-shell{width:100%;max-width:var(--ky-shell);margin-inline:auto;padding-inline:var(--ky-gutter)}

/* ---------- 跳转链接 ---------- */
.ky-skip{
  position:absolute;left:var(--ky-gutter);top:-64px;z-index:200;
  padding:10px 18px;border-radius:0 0 10px 10px;
  background:var(--ky-gold);color:var(--ky-ink);
  font-size:.9rem;font-weight:700;letter-spacing:.04em;text-decoration:none;
  transition:top .18s var(--ky-ease);
}
.ky-skip:focus{top:0}

/* ---------- 头部：悬浮胶囊岛 ---------- */
.ky-header{position:sticky;top:0;z-index:80;padding-top:10px}
.ky-header__inner{
  position:relative;
  display:flex;align-items:center;gap:clamp(8px,1.4vw,18px);
  min-height:64px;
  padding:8px 12px 8px 16px;
  background:rgba(11,27,43,.93);
  border:1px solid var(--ky-ink-line);
  border-radius:var(--ky-pill);
  box-shadow:var(--ky-shadow);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  transition:background .18s var(--ky-ease),box-shadow .18s var(--ky-ease),border-color .18s var(--ky-ease);
}
.ky-header[data-scrolled] .ky-header__inner{
  background:rgba(11,27,43,.985);
  border-color:rgba(201,162,39,.42);
  box-shadow:0 16px 34px -24px rgba(11,27,43,.9);
}
.ky-header__progress{
  position:absolute;left:22px;right:22px;bottom:5px;height:2px;
  background:linear-gradient(90deg,var(--ky-gold),var(--ky-cyan));
  transform:scaleX(0);transform-origin:left center;
  border-radius:2px;opacity:.9;
  transition:transform .12s linear;
}

/* 品牌 */
.ky-brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;text-decoration:none}
.ky-brand__text{display:flex;flex-direction:column;line-height:1.2}
.ky-brand__lockup{
  font-family:var(--ky-serif);font-size:1.02rem;letter-spacing:.02em;
  color:var(--ky-paper);white-space:nowrap;
}
.ky-brand__subline{
  font-family:var(--ky-mono);font-size:.68rem;letter-spacing:.08em;
  color:rgba(245,241,232,.52);white-space:nowrap;
}

/* 印章 */
.ky-seal{
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
  font-family:var(--ky-serif);color:var(--ky-gold-soft);
  background:rgba(201,162,39,.1);
  border:1px solid rgba(201,162,39,.55);
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,8px 100%,0 calc(100% - 8px));
  letter-spacing:.06em;
}
.ky-seal--sm{width:34px;height:34px;font-size:.95rem}
.ky-seal--lg{width:58px;height:58px;font-size:1.05rem;margin-bottom:16px}

/* 当前栏目徽标 */
.ky-header__current{
  display:inline-flex;align-items:center;gap:8px;flex:0 0 auto;
  padding:5px 11px;
  font-family:var(--ky-mono);font-size:.72rem;letter-spacing:.12em;
  color:var(--ky-gold-soft);
  border:1px solid rgba(201,162,39,.42);
  border-radius:3px;
  white-space:nowrap;
}
.ky-header__current::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--ky-cyan);box-shadow:0 0 0 3px rgba(47,191,168,.16);
}

/* 导航胶囊 */
.ky-nav{
  display:flex;align-items:center;gap:clamp(6px,1vw,14px);
  margin-left:auto;
  padding:5px 6px 5px 8px;
  background:rgba(18,41,63,.72);
  border:1px solid var(--ky-ink-line);
  border-radius:var(--ky-pill);
}
.ky-nav__list{display:flex;align-items:center;gap:2px}
.ky-nav__item{display:flex}
.ky-nav__link{
  display:block;padding:8px 12px;border-radius:var(--ky-pill);
  font-size:clamp(.82rem,.78vw,.94rem);letter-spacing:.02em;
  color:rgba(245,241,232,.8);text-decoration:none;white-space:nowrap;
  transition:color .18s var(--ky-ease),background .18s var(--ky-ease);
}
.ky-nav__link:hover{color:var(--ky-paper);background:rgba(201,162,39,.16)}
.ky-nav__link[aria-current="page"]{
  background:linear-gradient(180deg,var(--ky-gold-soft),var(--ky-gold));
  color:var(--ky-ink);font-weight:700;
}
.ky-nav__note{
  display:none;
  font-family:var(--ky-mono);font-size:.72rem;letter-spacing:.08em;
  color:rgba(245,241,232,.5);
}
.ky-nav__utility{
  display:flex;align-items:center;gap:8px;
  margin-left:4px;padding-left:10px;
  border-left:1px solid var(--ky-ink-line);
}

/* 移动端栏目开关 */
.ky-burger{
  display:none;align-items:center;gap:9px;flex:0 0 auto;margin-left:auto;
  padding:9px 15px;border:1px solid var(--ky-ink-line);border-radius:var(--ky-pill);
  color:var(--ky-paper);font-size:.88rem;letter-spacing:.06em;cursor:pointer;
  transition:border-color .18s var(--ky-ease),color .18s var(--ky-ease);
}
.ky-burger:hover{border-color:var(--ky-gold);color:var(--ky-gold-soft)}
.ky-burger__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.ky-burger__bars i{display:block;height:1.5px;background:currentColor;border-radius:2px;transition:transform .18s var(--ky-ease)}
.ky-burger[aria-expanded="true"] .ky-burger__bars i:first-child{transform:translateY(2.75px) rotate(45deg)}
.ky-burger[aria-expanded="true"] .ky-burger__bars i:last-child{transform:translateY(-2.75px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.ky-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border:1px solid transparent;border-radius:var(--ky-pill);
  font-family:var(--ky-sans);font-size:.9rem;font-weight:600;line-height:1;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;white-space:nowrap;
  transition:background .18s var(--ky-ease),color .18s var(--ky-ease),
             border-color .18s var(--ky-ease),box-shadow .18s var(--ky-ease),transform .18s var(--ky-ease);
}
.ky-btn--gold{background:linear-gradient(180deg,var(--ky-gold-soft),var(--ky-gold));color:var(--ky-ink);border-color:rgba(227,197,106,.7)}
.ky-btn--gold:hover{background:var(--ky-gold-soft);box-shadow:0 10px 24px -14px rgba(201,162,39,.95)}
.ky-btn--ghost{background:transparent;color:var(--ky-paper);border-color:var(--ky-ink-line)}
.ky-btn--ghost:hover{border-color:var(--ky-gold);color:var(--ky-gold-soft)}
.ky-btn--line{background:transparent;color:var(--ky-ink);border-color:rgba(201,162,39,.7)}
.ky-btn--line:hover{background:rgba(201,162,39,.12)}
.ky-btn--sm{padding:8px 14px;font-size:.8rem}
.ky-btn--copy{min-width:7.8rem}
.ky-btn--copy[data-copy-state="done"]{border-color:var(--ky-cyan);color:#8FE3D4}
.ky-btn--copy[data-copy-state="fail"]{border-color:var(--ky-cinnabar);color:#F0B3AA}

/* ---------- 页脚 ---------- */
.ky-footer{
  position:relative;
  margin-top:clamp(56px,8vw,110px);
  background:var(--ky-ink);
  color:rgba(245,241,232,.78);
  border-top:1px solid var(--ky-gold);
}
.ky-footer__ornament{
  display:block;height:10px;
  background:repeating-linear-gradient(90deg,rgba(201,162,39,.55) 0 1px,transparent 1px 24px);
  opacity:.7;
}
.ky-footer__inner{
  display:grid;
  grid-template-columns:1.35fr .75fr .85fr 1.25fr;
  gap:clamp(24px,3.4vw,56px);
  padding-top:clamp(40px,5.6vw,72px);
  padding-bottom:clamp(30px,4vw,48px);
}
.ky-footer__brand{min-width:0}
.ky-footer__lockup{
  font-family:var(--ky-serif);font-size:1.2rem;letter-spacing:.02em;
  color:var(--ky-paper);margin-bottom:6px;
}
.ky-footer__subline{
  font-family:var(--ky-mono);font-size:.72rem;letter-spacing:.08em;
  color:var(--ky-gold-soft);margin-bottom:14px;
}
.ky-footer__footnote{
  font-size:.86rem;line-height:1.7;color:rgba(245,241,232,.58);
  max-width:32ch;padding-top:14px;border-top:1px solid rgba(30,58,85,.9);
}
.ky-footer__title{
  font-family:var(--ky-serif);font-size:1rem;letter-spacing:.06em;
  color:var(--ky-paper);margin-bottom:16px;
}
.ky-footer__list{display:flex;flex-direction:column;gap:10px}
.ky-footer__list li{
  position:relative;padding-left:14px;font-size:.88rem;line-height:1.6;
  color:rgba(245,241,232,.66);word-break:break-word;
}
.ky-footer__list li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:7px;height:1px;background:var(--ky-gold);opacity:.85;
}
.ky-footer__list--plain li::before{background:rgba(201,162,39,.5)}
.ky-footer__link{
  color:rgba(245,241,232,.78);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ky-ease),border-color .18s var(--ky-ease);
}
.ky-footer__link:hover{color:var(--ky-gold-soft);border-bottom-color:var(--ky-gold)}
.ky-footer__meta{
  margin-top:18px;padding:12px 14px;
  font-family:var(--ky-mono);font-size:.72rem;line-height:1.7;letter-spacing:.04em;
  color:rgba(245,241,232,.55);
  background:rgba(18,41,63,.85);
  border-left:2px solid var(--ky-cinnabar);
}
.ky-footer__base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;
  padding-top:18px;padding-bottom:28px;
  border-top:1px solid rgba(30,58,85,.9);
  font-size:.8rem;color:rgba(245,241,232,.5);
}
.ky-footer__copy,.ky-footer__icp{margin:0;font-family:var(--ky-mono);letter-spacing:.04em}

/* ---------- 区块骨架 ---------- */
.ky-section{padding:clamp(44px,6vw,88px) 0}
.ky-section--dark{background:var(--ky-ink);color:rgba(245,241,232,.82)}
.ky-section--dark .ky-section__title{color:var(--ky-paper)}
.ky-section--dark .ky-section__desc{color:rgba(245,241,232,.66)}
.ky-section--dark .ky-prose{color:rgba(245,241,232,.82)}
.ky-section--dark .ky-prose h2,
.ky-section--dark .ky-prose h3,
.ky-section--dark .ky-prose strong{color:var(--ky-paper)}
.ky-section__head{display:flex;flex-direction:column;gap:12px;max-width:62ch;margin-bottom:clamp(22px,3vw,36px)}
.ky-section__title{
  font-family:var(--ky-serif);font-size:clamp(1.5rem,2.6vw,2.2rem);
  line-height:1.25;letter-spacing:-.01em;color:var(--ky-ink);
}
.ky-section__desc{font-size:.96rem;color:var(--ky-muted)}
.ky-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--ky-mono);font-size:.74rem;letter-spacing:.2em;
  color:var(--ky-gold);text-transform:uppercase;
}
.ky-eyebrow::before{content:"";width:22px;height:1px;background:currentColor}

/* ---------- 网格 ---------- */
.ky-grid{display:grid;gap:clamp(16px,2vw,24px);grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.ky-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.ky-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.ky-grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- 正文容器 ---------- */
.ky-prose{max-width:38em;font-size:1.02rem;line-height:1.85}
.ky-prose h2{
  font-family:var(--ky-serif);font-size:clamp(1.35rem,2.1vw,1.85rem);
  line-height:1.3;color:var(--ky-ink);margin:2.2em 0 .6em;letter-spacing:-.01em;
}
.ky-prose h3{font-family:var(--ky-serif);font-size:1.14rem;color:var(--ky-ink);margin:1.8em 0 .5em}
.ky-prose p{margin-bottom:1.1em}
.ky-prose ul,.ky-prose ol{padding-left:1.35em;margin-bottom:1.2em;list-style:disc}
.ky-prose ol{list-style:decimal}
.ky-prose li{margin:.4em 0}
.ky-prose a{color:var(--ky-ink);text-decoration:none;border-bottom:1px solid var(--ky-gold)}
.ky-prose a:hover{background:rgba(201,162,39,.16)}
.ky-prose strong{color:var(--ky-ink);font-weight:700}
.ky-prose code{
  font-family:var(--ky-mono);font-size:.88em;
  padding:2px 6px;border-radius:3px;
  background:rgba(11,27,43,.07);color:var(--ky-ink);
}

/* ---------- 面包屑 ---------- */
.ky-breadcrumb{padding:clamp(18px,2.4vw,28px) 0 0}
.ky-breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:.82rem;color:var(--ky-muted)}
.ky-breadcrumb__link{color:var(--ky-muted);text-decoration:none;transition:color .18s var(--ky-ease)}
.ky-breadcrumb__link:hover{color:var(--ky-gold)}
.ky-breadcrumb__sep{color:var(--ky-gold);font-family:var(--ky-mono);opacity:.8}
.ky-breadcrumb__current{color:var(--ky-ink);font-weight:600}

/* ---------- 切角面板与卡片 ---------- */
.ky-panel{
  position:relative;padding:clamp(20px,3vw,34px);
  background:#FFFDF8;
  border:1px solid rgba(11,27,43,.12);
  clip-path:polygon(0 0,calc(100% - var(--ky-cut)) 0,100% var(--ky-cut),100% 100%,var(--ky-cut) 100%,0 calc(100% - var(--ky-cut)));
}
.ky-panel--dark{background:var(--ky-ink-panel);border-color:var(--ky-ink-line);color:rgba(245,241,232,.82)}
.ky-panel--dark .ky-card__title,.ky-panel--dark h2,.ky-panel--dark h3{color:var(--ky-paper)}

.ky-card{
  position:relative;display:block;padding:clamp(18px,2.4vw,26px);
  background:#FFFDF8;
  border:1px solid rgba(11,27,43,.12);
  clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,14px 100%,0 calc(100% - 14px));
  transition:transform .18s var(--ky-ease),border-color .18s var(--ky-ease);
}
.ky-card::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;
  background:linear-gradient(90deg,var(--ky-gold),var(--ky-gold-soft));
  transform:scaleX(0);transform-origin:left center;
  transition:transform .32s var(--ky-ease);
}
.ky-card:hover{transform:translateY(-2px);border-color:rgba(201,162,39,.5)}
.ky-card:hover::after{transform:scaleX(1)}
.ky-card--dark{background:var(--ky-ink-panel);border-color:var(--ky-ink-line)}
.ky-card--dark .ky-card__title{color:var(--ky-paper)}
.ky-card--dark .ky-card__text{color:rgba(245,241,232,.7)}
.ky-card__title{
  font-family:var(--ky-serif);font-size:1.16rem;line-height:1.4;
  color:var(--ky-ink);margin-bottom:.5em;
}
.ky-card__meta{
  display:block;margin-bottom:10px;
  font-family:var(--ky-mono);font-size:.72rem;letter-spacing:.14em;
  color:var(--ky-muted);text-transform:uppercase;
}
.ky-card__text{font-size:.92rem;line-height:1.7;color:var(--ky-text)}

/* ---------- 标签 ---------- */
.ky-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;border:1px solid rgba(11,27,43,.2);border-radius:2px;
  font-family:var(--ky-mono);font-size:.72rem;letter-spacing:.08em;
  color:var(--ky-ink);background:rgba(231,223,204,.7);
}
.ky-tag--gold{border-color:rgba(201,162,39,.6);color:#8A6F14;background:rgba(227,197,106,.24)}
.ky-tag--red{border-color:rgba(178,58,46,.5);color:#8E2C22;background:rgba(178,58,46,.12)}
.ky-tag--cyan{border-color:rgba(47,191,168,.55);color:#1C7A6B;background:rgba(47,191,168,.14)}

/* ---------- 图片容器 ---------- */
.ky-media{
  position:relative;display:block;overflow:hidden;
  background:
    repeating-linear-gradient(135deg,rgba(201,162,39,.14) 0 1px,transparent 1px 12px),
    linear-gradient(140deg,var(--ky-ink-panel),var(--ky-ink));
  border:1px solid rgba(201,162,39,.32);
  clip-path:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,16px 100%,0 calc(100% - 16px));
}
.ky-media img{width:100%;height:100%;object-fit:cover}
.ky-media--16x9{aspect-ratio:16/9}
.ky-media--4x3{aspect-ratio:4/3}
.ky-media--1x1{aspect-ratio:1/1}
.ky-media--wide{aspect-ratio:21/9}
.ky-media__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:14px 16px;
  font-size:.78rem;line-height:1.6;color:rgba(245,241,232,.78);
  background:linear-gradient(180deg,transparent,rgba(11,27,43,.85));
}

/* ---------- 显现动效 ---------- */
[data-reveal]{
  opacity:0;transform:translateY(10px);
  transition:opacity .18s var(--ky-ease),transform .18s var(--ky-ease);
}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 标签页 ---------- */
.ky-tabs{display:flex;flex-direction:column;gap:clamp(16px,2.2vw,26px)}
.ky-tabs__list{
  position:relative;display:inline-flex;flex-wrap:wrap;gap:4px;
  align-self:flex-start;padding:4px;
  background:var(--ky-paper-2);
  border:1px solid rgba(11,27,43,.1);
  border-radius:var(--ky-pill);
}
.ky-tabs__indicator{
  position:absolute;top:4px;bottom:4px;left:0;width:0;
  background:var(--ky-ink);border-radius:var(--ky-pill);z-index:0;
  transition:transform .22s var(--ky-ease),width .22s var(--ky-ease);
}
.ky-tabs__tab{
  position:relative;z-index:1;
  padding:9px 18px;border-radius:var(--ky-pill);
  font-size:.9rem;font-weight:600;letter-spacing:.02em;color:var(--ky-text);
  cursor:pointer;transition:color .18s var(--ky-ease);
}
.ky-tabs__tab:hover{color:var(--ky-ink)}
.ky-tabs__tab[aria-selected="true"]{color:var(--ky-paper)}
.ky-tabs__panels{position:relative}
.ky-tabs__panel{animation:ky-fade .12s var(--ky-ease)}
@keyframes ky-fade{from{opacity:.2}to{opacity:1}}

/* ---------- 手风琴 ---------- */
.ky-acc{display:flex;flex-direction:column;gap:10px}
.ky-acc__item{
  background:#FFFDF8;border:1px solid rgba(11,27,43,.12);
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));
}
.ky-acc__trigger{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;padding:16px 20px;text-align:left;cursor:pointer;
  font-family:var(--ky-serif);font-size:1rem;color:var(--ky-ink);
}
.ky-acc__trigger::after{
  content:"";flex:0 0 auto;width:9px;height:9px;
  border-right:1.5px solid var(--ky-gold);border-bottom:1.5px solid var(--ky-gold);
  transform:rotate(45deg) translate(-2px,-2px);
  transition:transform .18s var(--ky-ease);
}
.ky-acc__trigger.is-open::after{transform:rotate(225deg) translate(-2px,-2px)}
.ky-acc__panel{padding:0 20px 20px;font-size:.94rem;line-height:1.8;color:var(--ky-text)}

/* ---------- 头部响应式 ---------- */
@media (max-width:1279px){
  .ky-brand__subline{display:none}
}
@media (max-width:1199px){
  .ky-header__current{display:none}
}
@media (max-width:1023px){
  .ky-burger{display:inline-flex}
  .ky-nav{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    margin-left:0;padding:16px;
    background:rgba(11,27,43,.985);
    border:1px solid var(--ky-ink-line);
    border-radius:22px;
    box-shadow:var(--ky-shadow);
    visibility:hidden;opacity:0;pointer-events:none;
    transform:translateY(-8px);
    transition:opacity .18s var(--ky-ease),transform .18s var(--ky-ease),visibility .18s var(--ky-ease);
  }
  .ky-nav[data-open]{visibility:visible;opacity:1;pointer-events:auto;transform:none}
  .ky-nav__list{flex-direction:column;align-items:stretch;gap:4px}
  .ky-nav__link{padding:12px 14px;border-radius:12px;font-size:1rem}
  .ky-nav__note{display:block;padding:14px 4px 0}
  .ky-nav__utility{
    flex-direction:column;align-items:stretch;
    margin:14px 0 0;padding:14px 0 0;
    border-left:0;border-top:1px solid var(--ky-ink-line);
  }
  .ky-nav__utility .ky-btn{width:100%}
  .ky-btn--copy{min-width:0}
}

/* ---------- 页脚响应式 ---------- */
@media (max-width:1023px){
  .ky-footer__inner{grid-template-columns:1fr 1fr}
  .ky-footer__brand{grid-column:1 / -1}
  .ky-footer__footnote{max-width:none}
}
@media (max-width:599px){
  .ky-footer__inner{grid-template-columns:1fr}
  .ky-footer__base{flex-direction:column;align-items:flex-start}
}

/* ---------- 网格响应式 ---------- */
@media (max-width:900px){
  .ky-grid--3,.ky-grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:560px){
  .ky-grid--2,.ky-grid--3,.ky-grid--4{grid-template-columns:1fr}
}
@media (max-width:640px){
  .ky-tabs__list{width:100%}
  .ky-tabs__indicator{display:none}
  .ky-tabs__tab{flex:1 1 auto;text-align:center}
  .ky-tabs__tab[aria-selected="true"]{background:var(--ky-ink);color:var(--ky-paper)}
}

/* ---------- 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;
  }
  [data-reveal]{opacity:1;transform:none}
  .ky-header__progress{transition:none}
}