/* ============================================================
   欧博娱乐 · 共享外壳样式  /assets/site.css
   深蓝夜空基底 + 暖纸阅读层 + 经幡五色功能色
   ============================================================ */

:root{
  --ob-night:#0A1730;
  --ob-night-2:#10224A;
  --ob-paper:#F5EEE1;
  --ob-paper-2:#FBF7EF;
  --ob-ink:#1F1B16;
  --ob-gold:#F2A93B;
  --ob-red:#D0402F;
  --ob-green:#1E9E6B;
  --ob-green-deep:#14724B;
  --ob-blue:#3C7BD9;
  --ob-yellow:#F5C64A;
  --ob-slate:#8A9AB4;
  --ob-glass:rgba(245,238,225,.12);
  --ob-glass-line:rgba(245,238,225,.24);
  --ob-hairline:rgba(31,27,22,.14);
  --ob-hairline-light:rgba(245,238,225,.18);
  --ob-muted:#6A6157;

  --ob-font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ob-font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ob-font-serif:"Songti SC","Noto Serif CJK SC","Source Han Serif SC",Georgia,"SimSun",serif;
  --ob-font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --ob-w:1180px;
  --ob-gutter:clamp(18px,4vw,40px);
  --ob-ease:cubic-bezier(.22,.61,.36,1);
  --ob-header-h:64px;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--ob-header-h) + 14px);
}
body{
  margin:0;
  font-family:var(--ob-font-body);
  font-size:16.5px;
  line-height:1.75;
  color:var(--ob-paper);
  background-color:var(--ob-night);
  background-image:
    radial-gradient(1.6px 1.6px at 11% 16%,rgba(245,238,225,.40),transparent 62%),
    radial-gradient(1.4px 1.4px at 74% 8%,rgba(245,238,225,.32),transparent 62%),
    radial-gradient(1.2px 1.2px at 33% 41%,rgba(245,238,225,.24),transparent 62%),
    radial-gradient(1.6px 1.6px at 88% 33%,rgba(242,169,59,.34),transparent 62%),
    radial-gradient(1.2px 1.2px at 58% 62%,rgba(245,238,225,.20),transparent 62%),
    radial-gradient(1.4px 1.4px at 22% 78%,rgba(60,123,217,.34),transparent 62%),
    radial-gradient(1.2px 1.2px at 92% 84%,rgba(245,238,225,.22),transparent 62%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}
img,svg{display:block;max-width:100%;}
a{color:inherit;}
button{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5,h6,p,figure,blockquote{margin:0;}
table{border-collapse:collapse;width:100%;}
[hidden]{display:none !important;}
:focus-visible{outline:2px solid var(--ob-blue);outline-offset:3px;border-radius:4px;}

/* ---------- 容器与基础层 ---------- */
.ob-container{
  width:100%;
  max-width:var(--ob-w);
  margin-inline:auto;
  padding-inline:var(--ob-gutter);
}
#main-content{display:block;outline:none;}
.ob-paper-layer{background:var(--ob-paper);color:var(--ob-ink);}
.ob-night-layer{background:var(--ob-night-2);color:var(--ob-paper);}

/* ---------- 跳转链接 ---------- */
.ob-skip{
  position:fixed;
  top:0;
  left:16px;
  z-index:130;
  transform:translateY(-150%);
  padding:10px 18px;
  border-radius:0 0 8px 8px;
  background:var(--ob-gold);
  color:#231800;
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  transition:transform 160ms var(--ob-ease);
}
.ob-skip:focus{transform:translateY(0);}

/* ---------- 滚动进度条（经幡色） ---------- */
.ob-progress{
  position:fixed;
  top:0;
  left:0;
  height:3px;
  width:0;
  z-index:120;
  pointer-events:none;
  background:linear-gradient(90deg,var(--ob-blue) 0%,var(--ob-paper) 30%,var(--ob-red) 55%,var(--ob-green) 78%,var(--ob-yellow) 100%);
  transition:width 140ms linear;
}

/* ---------- 头部 ---------- */
.ob-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:100;
  color:var(--ob-paper);
  background:rgba(10,23,48,.34);
  -webkit-backdrop-filter:blur(9px) saturate(1.15);
  backdrop-filter:blur(9px) saturate(1.15);
  border-bottom:1px solid var(--ob-hairline-light);
  transition:background-color 220ms var(--ob-ease),color 220ms var(--ob-ease),
             border-color 220ms var(--ob-ease),box-shadow 220ms var(--ob-ease);
}
.ob-header.is-solid{
  background:var(--ob-paper);
  color:var(--ob-ink);
  border-bottom-color:var(--ob-gold);
  box-shadow:0 16px 32px -26px rgba(10,23,48,.9);
}
.ob-header__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  min-height:var(--ob-header-h);
}

.ob-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  line-height:1;
  text-decoration:none;
  color:inherit;
}
.ob-brand__mark{
  width:13px;
  height:13px;
  flex:0 0 auto;
  border-radius:2px;
  background:var(--ob-gold);
  transform:rotate(45deg);
  box-shadow:0 0 14px rgba(242,169,59,.8);
}
.ob-brand__name{
  font-family:var(--ob-font-display);
  font-size:18px;
  font-weight:900;
  letter-spacing:.06em;
}
.ob-brand__ver{
  font-family:var(--ob-font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--ob-slate);
  border:1px solid currentColor;
  border-radius:4px;
  padding:3px 8px;
  white-space:nowrap;
}
.ob-header.is-solid .ob-brand__ver{color:var(--ob-muted);}

.ob-nav{
  flex:1 1 auto;
  min-width:0;
  display:flex;
  justify-content:flex-end;
}
.ob-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  max-width:100%;
  overflow-x:auto;
  scrollbar-width:none;
}
.ob-nav__list::-webkit-scrollbar{display:none;}
.ob-nav__link{
  display:inline-block;
  white-space:nowrap;
  padding:9px 13px;
  border-radius:7px;
  border:1px solid transparent;
  font-size:14.5px;
  font-weight:650;
  letter-spacing:.02em;
  text-decoration:none;
  color:inherit;
  transition:background-color 160ms,color 160ms,border-color 160ms;
}
.ob-nav__link:hover{
  background:rgba(245,238,225,.16);
  border-color:rgba(245,238,225,.3);
}
.ob-header.is-solid .ob-nav__link:hover{
  background:rgba(10,23,48,.07);
  border-color:rgba(10,23,48,.18);
}
.ob-nav__link[aria-current="page"]{
  color:var(--ob-gold);
  background:rgba(242,169,59,.14);
  border-color:rgba(242,169,59,.85);
}
.ob-header.is-solid .ob-nav__link[aria-current="page"]{
  color:var(--ob-ink);
  background:rgba(242,169,59,.3);
  border-color:var(--ob-gold);
}

.ob-navtoggle{
  display:none;
  align-items:center;
  gap:9px;
  flex:0 0 auto;
  padding:8px 14px;
  border-radius:999px;
  border:1px solid currentColor;
  background:transparent;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  cursor:pointer;
  transition:background-color 160ms,border-color 160ms;
}
.ob-navtoggle:hover{background:rgba(245,238,225,.14);}
.ob-header.is-solid .ob-navtoggle:hover{background:rgba(10,23,48,.07);}
.ob-navtoggle__bars{
  position:relative;
  display:block;
  width:15px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:background-color 200ms;
}
.ob-navtoggle__bars::before,
.ob-navtoggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:15px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform 200ms var(--ob-ease);
}
.ob-navtoggle__bars::before{top:-5px;}
.ob-navtoggle__bars::after{top:5px;}
.ob-header[data-open] .ob-navtoggle__bars{background:transparent;}
.ob-header[data-open] .ob-navtoggle__bars::before{transform:translateY(5px) rotate(45deg);}
.ob-header[data-open] .ob-navtoggle__bars::after{transform:translateY(-5px) rotate(-45deg);}

/* ---------- 页脚 ---------- */
.ob-footer{
  position:relative;
  background:var(--ob-night-2);
  color:var(--ob-paper);
}
.ob-footer::before{
  content:"";
  display:block;
  height:3px;
  background:linear-gradient(90deg,
    var(--ob-blue) 0 20%,
    var(--ob-paper) 20% 40%,
    var(--ob-red) 40% 60%,
    var(--ob-green) 60% 80%,
    var(--ob-yellow) 80% 100%);
  opacity:.9;
}
.ob-footer__top{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:38px 0 30px;
  border-bottom:1px solid var(--ob-hairline-light);
}
.ob-footer__brand{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
}
.ob-footer__brandname{
  font-family:var(--ob-font-display);
  font-size:20px;
  font-weight:900;
  letter-spacing:.06em;
}
.ob-footer__brandsub{
  font-family:var(--ob-font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--ob-slate);
  padding-left:13px;
  border-left:1px solid var(--ob-hairline-light);
}
.ob-footer__grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:34px 28px;
  padding:40px 0 44px;
}
.ob-footer__col{min-width:0;}
.ob-footer__title{
  margin:0 0 14px;
  font-family:var(--ob-font-mono);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--ob-gold);
  text-transform:uppercase;
}
.ob-footer__list{
  display:grid;
  gap:10px;
  font-size:14px;
  line-height:1.5;
}
.ob-footer__list a{
  color:rgba(245,238,225,.82);
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color 160ms,border-color 160ms;
}
.ob-footer__list a::before{
  content:"›";
  display:inline-block;
  width:13px;
  font-family:var(--ob-font-mono);
  color:var(--ob-blue);
  opacity:.9;
}
.ob-footer__list a:hover{
  color:var(--ob-paper);
  border-bottom-color:var(--ob-gold);
}
.ob-footer__meta{
  margin:16px 0 0;
  font-size:13px;
  line-height:1.8;
  color:rgba(245,238,225,.68);
  word-break:break-word;
}
.ob-footer__meta a{color:var(--ob-gold);text-decoration:none;}
.ob-footer__meta a:hover{border-bottom:1px solid var(--ob-gold);}
.ob-footer__mono{
  font-family:var(--ob-font-mono);
  font-size:12px;
  letter-spacing:.04em;
}
.ob-footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 26px;
  padding:20px 0 30px;
  border-top:1px solid var(--ob-hairline-light);
  font-size:12.5px;
  letter-spacing:.03em;
  color:var(--ob-slate);
}

/* ---------- 按钮 ---------- */
.ob-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:8px;
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:background-color 160ms var(--ob-ease),color 160ms var(--ob-ease),
             border-color 160ms var(--ob-ease),box-shadow 160ms var(--ob-ease),
             transform 140ms var(--ob-ease);
}
.ob-btn:active{transform:translateY(1px);}
.ob-btn--sm{padding:9px 16px;font-size:13.5px;border-radius:7px;}
.ob-btn--gold{
  background:var(--ob-gold);
  color:#231800;
  box-shadow:0 12px 24px -16px rgba(242,169,59,.95);
}
.ob-btn--gold:hover{background:#FFBC52;}
.ob-btn--red{background:var(--ob-red);color:#fff;}
.ob-btn--red:hover{background:#E2503D;}
.ob-btn--ink{background:var(--ob-ink);color:var(--ob-paper);}
.ob-btn--ink:hover{background:#372F27;}
.ob-btn--ghost{background:transparent;color:inherit;border-color:currentColor;}
.ob-btn--ghost:hover{background:rgba(245,238,225,.14);}

/* ---------- 标签 ---------- */
.ob-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border-radius:999px;
  border:1px solid currentColor;
  font-family:var(--ob-font-mono);
  font-size:12px;
  letter-spacing:.06em;
  line-height:1.7;
}
.ob-tag--blue{color:#2559A8;background:rgba(60,123,217,.14);border-color:rgba(60,123,217,.5);}
.ob-tag--red{color:#A82C1D;background:rgba(208,64,47,.14);border-color:rgba(208,64,47,.5);}
.ob-tag--green{color:var(--ob-green-deep);background:rgba(30,158,107,.14);border-color:rgba(30,158,107,.5);}
.ob-tag--yellow{color:#8A6606;background:rgba(245,198,74,.24);border-color:rgba(245,198,74,.65);}
.ob-tag--gold{color:#8A5A06;background:rgba(242,169,59,.2);border-color:rgba(242,169,59,.7);}

/* ---------- 卡片 / 玻璃面板 ---------- */
.ob-card{
  position:relative;
  background:var(--ob-paper-2);
  color:var(--ob-ink);
  border:1px solid var(--ob-hairline);
  border-radius:12px;
  padding:22px 22px 24px;
}
.ob-card--night{
  background:rgba(245,238,225,.07);
  border-color:var(--ob-glass-line);
  color:var(--ob-paper);
}
.ob-card--link{
  transition:transform 180ms var(--ob-ease),box-shadow 180ms var(--ob-ease),border-color 180ms var(--ob-ease);
}
.ob-card--link:hover{
  transform:translateY(-3px);
  border-color:rgba(242,169,59,.85);
  box-shadow:0 20px 38px -28px rgba(10,23,48,.85);
}
.ob-card__title{
  margin:0 0 8px;
  font-family:var(--ob-font-display);
  font-size:19px;
  font-weight:900;
  line-height:1.35;
}
.ob-card__text{
  margin:0;
  font-size:14.5px;
  line-height:1.7;
  color:var(--ob-muted);
}
.ob-card--night .ob-card__text{color:var(--ob-slate);}

.ob-panel{
  background:var(--ob-glass);
  border:1px solid var(--ob-glass-line);
  border-radius:12px;
  padding:20px;
  color:var(--ob-paper);
  -webkit-backdrop-filter:blur(10px) saturate(1.2);
  backdrop-filter:blur(10px) saturate(1.2);
}

/* ---------- 栅格 ---------- */
.ob-grid{display:grid;gap:20px;}
.ob-grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.ob-grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.ob-grid--4{grid-template-columns:repeat(4,minmax(0,1fr));}

/* ---------- 章节 ---------- */
.ob-section{padding:clamp(48px,7vw,84px) 0;}
.ob-section--night{background:var(--ob-night);color:var(--ob-paper);}
.ob-section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:clamp(12px,2vw,20px);
  margin-bottom:clamp(22px,3vw,34px);
}
.ob-num{
  font-family:var(--ob-font-mono);
  font-size:clamp(30px,4.6vw,50px);
  font-weight:700;
  line-height:.9;
  letter-spacing:-.03em;
  color:rgba(31,27,22,.16);
}
.ob-section--night .ob-num{color:rgba(245,238,225,.22);}
.ob-section__title{
  margin:0;
  font-family:var(--ob-font-display);
  font-size:clamp(22px,2.8vw,30px);
  font-weight:900;
  line-height:1.2;
  letter-spacing:.01em;
}
.ob-section__sub{
  flex:1 1 260px;
  margin:0;
  font-size:14.5px;
  line-height:1.65;
  color:var(--ob-muted);
  max-width:64ch;
}
.ob-section--night .ob-section__sub{color:var(--ob-slate);}

/* ---------- 全宽色带 ---------- */
.ob-band{padding:30px 0;background:var(--ob-gold);color:#2A1C02;}
.ob-band--red{background:var(--ob-red);color:#fff;}
.ob-band--green{background:var(--ob-green);color:#fff;}
.ob-band--night{background:var(--ob-night);color:var(--ob-paper);}
.ob-band--paper{background:var(--ob-paper);color:var(--ob-ink);}
.ob-band__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px 28px;
}
.ob-band__title{
  margin:0;
  font-family:var(--ob-font-display);
  font-size:clamp(19px,2.2vw,23px);
  font-weight:900;
  line-height:1.3;
}
.ob-band__text{
  margin:0;
  font-size:15px;
  line-height:1.65;
  max-width:62ch;
}

/* ---------- 正文排版 ---------- */
.ob-prose{
  max-width:70ch;
  font-size:16.5px;
  line-height:1.78;
  color:var(--ob-ink);
}
.ob-prose > * + *{margin-top:1.1em;}
.ob-prose h2{
  font-family:var(--ob-font-display);
  font-size:clamp(22px,2.4vw,28px);
  font-weight:900;
  line-height:1.28;
}
.ob-prose h3{
  font-size:19px;
  font-weight:800;
  line-height:1.4;
}
.ob-prose ul,.ob-prose ol{display:grid;gap:.45em;padding-left:1.4em;}
.ob-prose ul{list-style:disc;}
.ob-prose ol{list-style:decimal;}
.ob-prose li{padding-left:.15em;}
.ob-prose a{color:var(--ob-blue);text-underline-offset:3px;}
.ob-prose strong{font-weight:800;}
.ob-prose code{
  font-family:var(--ob-font-mono);
  font-size:.9em;
  background:rgba(31,27,22,.07);
  border-radius:4px;
  padding:.1em .4em;
}
.ob-on-night .ob-prose,
.ob-prose.ob-prose--night{color:var(--ob-paper);}
.ob-prose--night a{color:var(--ob-yellow);}

/* ---------- 索引 / 坐标 / 图例 ---------- */
.ob-kicker{
  display:inline-block;
  font-family:var(--ob-font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--ob-blue);
}
.ob-coord{
  font-family:var(--ob-font-mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ob-slate);
}
.ob-legend{
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  font-size:13px;
}
.ob-legend li{display:inline-flex;align-items:center;gap:8px;}
.ob-legend__dot{
  width:10px;
  height:10px;
  flex:0 0 auto;
  border-radius:3px;
  background:var(--ob-slate);
}
.ob-legend__dot--blue{background:var(--ob-blue);}
.ob-legend__dot--red{background:var(--ob-red);}
.ob-legend__dot--green{background:var(--ob-green);}
.ob-legend__dot--yellow{background:var(--ob-yellow);}
.ob-legend__dot--gold{background:var(--ob-gold);}

/* ---------- 面包屑 ---------- */
.ob-crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--ob-font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
}
.ob-crumbs a{
  text-decoration:none;
  opacity:.75;
  border-bottom:1px solid transparent;
}
.ob-crumbs a:hover{opacity:1;border-bottom-color:currentColor;}
.ob-crumbs__sep{opacity:.45;}

/* ---------- 复制按钮 ---------- */
.ob-copy{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border-radius:6px;
  border:1px solid rgba(60,123,217,.45);
  background:rgba(60,123,217,.1);
  color:var(--ob-blue);
  font-family:var(--ob-font-mono);
  font-size:12px;
  letter-spacing:.06em;
  cursor:pointer;
  transition:background-color 160ms,color 160ms,border-color 160ms;
}
.ob-copy:hover{background:rgba(60,123,217,.2);}
.ob-copy.is-done{
  border-color:rgba(30,158,107,.6);
  background:rgba(30,158,107,.16);
  color:var(--ob-green-deep);
}

/* ---------- 筛选条 ---------- */
.ob-filter{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.ob-filter__btn{
  padding:7px 14px;
  border-radius:999px;
  border:1px solid var(--ob-hairline);
  background:transparent;
  color:var(--ob-ink);
  font-family:var(--ob-font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  cursor:pointer;
  transition:background-color 150ms,color 150ms,border-color 150ms;
}
.ob-filter__btn:hover{border-color:var(--ob-gold);background:rgba(242,169,59,.16);}
.ob-filter__btn[aria-pressed="true"]{
  background:var(--ob-ink);
  border-color:var(--ob-ink);
  color:var(--ob-paper);
}
.ob-filter__count{
  margin-left:auto;
  font-family:var(--ob-font-mono);
  font-size:12.5px;
  color:var(--ob-muted);
}
.ob-section--night .ob-filter__btn{border-color:var(--ob-glass-line);color:var(--ob-paper);}
.ob-section--night .ob-filter__btn[aria-pressed="true"]{background:var(--ob-gold);border-color:var(--ob-gold);color:#231800;}
.ob-section--night .ob-filter__count{color:var(--ob-slate);}

/* ---------- 图片容器基础规则（供页面阶段使用） ---------- */
.ob-media{
  position:relative;
  display:block;
  overflow:hidden;
  isolation:isolate;
  aspect-ratio:16 / 10;
  border-radius:12px;
  border:1px solid var(--ob-hairline-light);
  background:linear-gradient(150deg,var(--ob-night-2),#0B1A38 70%);
}
.ob-media > img,
.ob-media > svg{
  width:100%;
  height:100%;
  object-fit:cover;
}
.ob-media--wide{aspect-ratio:21 / 9;}
.ob-media--tall{aspect-ratio:4 / 5;}
.ob-media--square{aspect-ratio:1 / 1;}
.ob-media--paper{
  background:linear-gradient(150deg,#E9E0CF,#F5EEE1);
  border-color:var(--ob-hairline);
}
.ob-media__veil{
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(10,23,48,0) 42%,rgba(10,23,48,.85) 100%);
}
.ob-media__cap{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:14px 16px;
  font-size:13.5px;
  line-height:1.55;
  color:var(--ob-paper);
}
.ob-media__badge{position:absolute;top:12px;left:12px;}

.ob-figure{margin:0;display:grid;gap:12px;}
.ob-figure figcaption{
  font-family:var(--ob-font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--ob-muted);
}
.ob-figure--night figcaption{color:var(--ob-slate);}

/* ---------- 显现动效 ---------- */
[data-reveal]{
  transition:opacity 260ms var(--ob-ease),transform 260ms var(--ob-ease);
}
[data-reveal].is-hidden{
  opacity:0;
  transform:translateY(12px);
}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .ob-grid--3,.ob-grid--4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .ob-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:920px){
  .ob-navtoggle{display:inline-flex;}
  .ob-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex:none;
    justify-content:flex-start;
    background:var(--ob-night-2);
    color:var(--ob-paper);
    border-top:1px solid rgba(242,169,59,.65);
    border-bottom:1px solid var(--ob-hairline-light);
    box-shadow:0 34px 54px -30px rgba(0,0,0,.9);
    max-height:calc(100vh - var(--ob-header-h));
    overflow-y:auto;
    padding:10px var(--ob-gutter) 18px;
  }
  .ob-header[data-open] .ob-nav{display:block;}
  .ob-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    overflow:visible;
  }
  .ob-nav__link,
  .ob-header.is-solid .ob-nav__link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:14px 12px;
    border-radius:8px;
    border-color:transparent;
    font-size:16.5px;
    font-weight:700;
    color:var(--ob-paper);
  }
  .ob-nav__link:hover,
  .ob-header.is-solid .ob-nav__link:hover{
    background:rgba(245,238,225,.14);
    border-color:rgba(245,238,225,.28);
  }
  .ob-nav__link[aria-current="page"],
  .ob-header.is-solid .ob-nav__link[aria-current="page"]{
    color:var(--ob-gold);
    background:rgba(242,169,59,.14);
    border-color:rgba(242,169,59,.85);
  }
  .ob-footer__top{padding:30px 0 24px;}
  .ob-footer__brandsub{
    flex-basis:100%;
    padding-left:0;
    border-left:0;
  }
}
@media (max-width:640px){
  body{font-size:16px;}
  .ob-grid--2,.ob-grid--3,.ob-grid--4{grid-template-columns:minmax(0,1fr);}
  .ob-footer__grid{
    grid-template-columns:minmax(0,1fr);
    gap:28px;
    padding:32px 0 36px;
  }
  .ob-brand__ver{display:none;}
  .ob-band__inner{flex-direction:column;align-items:flex-start;}
  .ob-section__sub{flex-basis:100%;}
}

/* ---------- 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;
  }
  [data-reveal],
  [data-reveal].is-hidden{
    opacity:1 !important;
    transform:none !important;
  }
}