/* =========================================================
   28杠主页 · 共享样式 /assets/site.css
   纸本暖白底 + 深墨字 + 黛青结构 + 朱砂红状态 + 鎏金索引
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --paper:#F4EDDF;
  --paper-2:#E6DAC4;
  --paper-3:#FCFAF6;
  --ink:#1B1917;
  --ink-soft:#3A3632;
  --dai:#2E4A52;
  --mist:#6C888E;
  --silver:#B7BDC0;
  --cinnabar:#A82C1F;
  --gold:#B98A2E;
  --rain:#14232A;

  --header-bg:rgba(244,237,223,.94);
  --wrap:1180px;
  --gutter:clamp(18px,4vw,56px);

  --font-display:"Songti SC","Source Han Serif SC","Noto Serif SC","SimSun",Georgia,serif;
  --font-body:"Inter",system-ui,-apple-system,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

:root[data-theme="ink"]{
  --paper:#16242B;
  --paper-2:#1D2F37;
  --paper-3:#1A2A31;
  --ink:#EDE6D8;
  --ink-soft:#CFC7B8;
  --dai:#7FA3AB;
  --mist:#8FA6AC;
  --silver:#3A4C54;
  --cinnabar:#C9503F;
  --gold:#D2A54A;
  --rain:#0E1A20;
  --header-bg:rgba(22,36,43,.94);
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:.01em;
  transition:background-color .25s ease,color .25s ease;
}
img,svg,video{display:block;max-width:100%}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cinnabar);outline-offset:3px}

/* 纸张肌理：细颗粒 + 轻微叠印 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:3;
  opacity:.5;
  mix-blend-mode:multiply;
  background-image:
    repeating-linear-gradient(0deg,rgba(27,25,23,.035) 0 1px,transparent 1px 3px),
    repeating-linear-gradient(90deg,rgba(27,25,23,.022) 0 1px,transparent 1px 4px);
}
:root[data-theme="ink"] body::before{opacity:.22}

#main-content{scroll-margin-top:132px}

/* ---------- 3. 通用排版 ---------- */
.display-xl{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(40px,7vw,64px);
  line-height:1.06;
  letter-spacing:.005em;
}
.display-l{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(30px,4.4vw,44px);
  line-height:1.14;
}
.section-title{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.2;
}
.card-title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:22px;
  line-height:1.35;
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--gold);
  text-transform:uppercase;
}
.lede{
  font-size:clamp(17px,2vw,20px);
  line-height:1.8;
  color:var(--ink-soft);
  max-width:34ch;
}
.prose{max-width:34ch}
.prose p{font-size:17px;line-height:1.85;color:var(--ink-soft)}
.prose p + p{margin-top:1.1em}
.mono{font-family:var(--font-mono);font-size:.92em;letter-spacing:.02em}
.muted{color:var(--mist)}
.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 4. 布局容器 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.wrap--wide{max-width:1360px}
.section{padding-block:clamp(48px,9vw,96px)}
.section--tint{background-color:var(--paper-2)}
.section--organic{border-radius:60px 14px 52px 16px}
.section-head{
  display:grid;
  gap:10px;
  border-top:1px solid var(--silver);
  padding-top:22px;
  margin-bottom:clamp(24px,4vw,44px);
}
.rule{height:1px;background:var(--silver);border:0;margin:0}
.stack > * + *{margin-top:var(--stack-gap,18px)}
.split{
  display:grid;
  gap:clamp(20px,4vw,56px);
  grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  align-items:start;
}
.split__offset{margin-top:clamp(0px,4vw,48px)}

/* ---------- 5. 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:50%;
  top:-64px;
  transform:translateX(-50%);
  z-index:120;
  background:var(--dai);
  color:var(--paper-3);
  padding:10px 20px;
  border-radius:0 0 12px 12px;
  font-size:14px;
  letter-spacing:.08em;
  transition:top .18s ease;
}
.skip-link:focus{top:0}

/* ---------- 6. 刊头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--header-bg);
  border-bottom:1px solid var(--silver);
  backdrop-filter:blur(8px);
}
.site-header__inner{
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.masthead{
  position:relative;
  display:flex;
  justify-content:center;
  padding:26px 0 14px;
  transition:padding .24s ease;
}
.masthead__brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:6px;
  text-align:center;
}
.masthead__mark{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(28px,4vw,40px);
  line-height:1;
  letter-spacing:.08em;
  color:var(--dai);
  transition:color .2s ease,font-size .24s ease;
}
.masthead__mark:hover{color:var(--cinnabar)}
.masthead__tagline{
  font-size:12.5px;
  letter-spacing:.3em;
  color:var(--mist);
  padding-left:.3em;
}
.masthead__tools{
  position:absolute;
  right:0;
  top:50%;
  transform:translateY(-50%);
  display:flex;
  align-items:center;
  gap:10px;
}
.tool-btn{
  font-size:13px;
  letter-spacing:.08em;
  padding:8px 13px;
  border:1px solid var(--silver);
  border-radius:999px;
  color:var(--dai);
  background:transparent;
  transition:border-color .2s ease,color .2s ease,background-color .2s ease;
}
.tool-btn:hover{border-color:var(--gold);color:var(--ink)}
.tool-btn[aria-expanded="true"],
.tool-btn[aria-pressed="true"]{
  background-color:var(--dai);
  border-color:var(--dai);
  color:var(--paper-3);
}
.tool-pop{
  position:absolute;
  top:calc(100% + 12px);
  right:0;
  width:216px;
  padding:14px;
  background-color:var(--paper-3);
  border:1px solid var(--silver);
  border-radius:16px 5px 16px 5px;
  box-shadow:0 12px 26px rgba(27,25,23,.14);
  z-index:80;
}
.tool-pop[hidden]{display:none}
.tool-pop__title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--mist);
  margin-bottom:8px;
}
.tool-pop__list li + li{margin-top:4px}
.tool-pop__list a{
  display:block;
  padding:7px 9px;
  border-radius:8px;
  font-size:15px;
  color:var(--ink);
  transition:background-color .18s ease,color .18s ease;
}
.tool-pop__list a:hover{background-color:var(--paper-2);color:var(--dai)}

.masthead__navrow{
  position:relative;
  display:flex;
  justify-content:center;
  padding-bottom:14px;
}
.site-nav__list{
  counter-reset:nav;
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:2px 26px;
}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:8px 2px;
  font-size:16px;
  font-weight:500;
  letter-spacing:.06em;
  color:var(--ink-soft);
  transition:color .2s ease;
}
.site-nav__link::before{
  counter-increment:nav;
  content:"0" counter(nav);
  font-family:var(--font-mono);
  font-size:10px;
  color:var(--gold);
  margin-right:7px;
  vertical-align:super;
  letter-spacing:0;
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;
  right:100%;
  bottom:1px;
  height:1px;
  background-color:var(--cinnabar);
  transition:right .22s ease;
}
.site-nav__link:hover{color:var(--dai)}
.site-nav__link:hover::after{right:0}
.site-nav__link[aria-current="page"]{color:var(--dai)}
.site-nav__link[aria-current="page"]::after{right:0;background-color:var(--dai)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-inline:auto;
  padding:9px 18px;
  border:1px solid var(--dai);
  border-radius:999px;
  color:var(--dai);
  transition:background-color .2s ease,color .2s ease;
}
.nav-toggle:hover{background-color:var(--dai);color:var(--paper-3)}
.nav-toggle__bars{
  display:inline-block;
  width:16px;
  height:2px;
  background-color:currentColor;
  box-shadow:0 5px 0 currentColor,0 -5px 0 currentColor;
}
.nav-toggle__text{font-size:13px;letter-spacing:.18em}

.readline{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background-color:transparent;
  overflow:hidden;
}
.readline__bar{
  display:block;
  width:100%;
  height:100%;
  background-color:var(--cinnabar);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .12s linear;
}

/* 收窄态（桌面） */
.site-header.is-condensed .masthead{padding:10px 0 8px}
.site-header.is-condensed .masthead__mark{font-size:24px}
.site-header.is-condensed .masthead__tagline{display:none}
.site-header.is-condensed .masthead__navrow{padding-bottom:10px}
.site-header.is-condensed .site-nav{display:none}
.site-header.is-condensed .nav-toggle{display:inline-flex}
.site-header.is-condensed[data-open] .site-nav{
  display:block;
  position:absolute;
  top:100%;
  left:calc(-1 * var(--gutter));
  right:calc(-1 * var(--gutter));
  padding:8px var(--gutter) 16px;
  background-color:var(--paper-3);
  border:1px solid var(--silver);
  border-top:0;
  border-radius:0 0 18px 18px;
  z-index:80;
}
.site-header.is-condensed[data-open] .site-nav__list{
  flex-direction:column;
  gap:0;
  align-items:stretch;
  text-align:left;
}
.site-header.is-condensed[data-open] .site-nav__link{
  display:block;
  padding:14px 4px;
  border-bottom:1px dashed var(--silver);
  font-size:18px;
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  background-color:var(--rain);
  color:#E8E1D3;
  margin-top:clamp(56px,9vw,110px);
}
.footer-notice{
  background-color:rgba(185,138,46,.13);
  border-bottom:1px solid rgba(183,189,192,.22);
}
.footer-notice__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 18px;
  padding-block:14px;
}
.footer-notice__label{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  color:var(--gold);
  border:1px solid rgba(185,138,46,.5);
  border-radius:999px;
  padding:3px 10px;
}
.footer-notice__text{
  font-size:13.5px;
  line-height:1.7;
  color:rgba(232,225,211,.78);
  flex:1 1 240px;
}
.footer-notice__link{
  font-size:13.5px;
  color:#E8E1D3;
  border-bottom:1px solid rgba(185,138,46,.75);
  padding-bottom:2px;
  transition:color .2s ease,border-color .2s ease;
}
.footer-notice__link:hover{color:var(--gold);border-color:var(--gold)}

.site-footer__inner{
  display:grid;
  grid-template-columns:1.15fr 1fr 1.35fr;
  gap:clamp(24px,4vw,56px);
  padding-block:clamp(40px,6vw,70px);
}
.footer-col{min-width:0}
.footer-brand{
  font-family:var(--font-display);
  font-weight:900;
  font-size:30px;
  line-height:1.1;
  letter-spacing:.08em;
  color:#F4EDDF;
}
.footer-tagline{
  margin-top:8px;
  font-size:12.5px;
  letter-spacing:.3em;
  color:rgba(232,225,211,.66);
}
.footer-icp{
  margin-top:20px;
  font-family:var(--font-mono);
  font-size:12.5px;
  color:rgba(232,225,211,.55);
  border-top:1px solid rgba(183,189,192,.24);
  padding-top:14px;
}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:400;
  letter-spacing:.24em;
  color:var(--gold);
  margin-bottom:14px;
}
.footer-col__title--second{margin-top:26px}
.footer-nav__list li + li{margin-top:6px}
.footer-nav__link{
  font-size:14.5px;
  line-height:1.7;
  color:rgba(232,225,211,.86);
  transition:color .2s ease;
}
.footer-nav__link:hover{color:var(--gold)}
.footer-nav__link[aria-current="page"]{color:var(--gold)}
.footer-contact li + li{margin-top:14px}
.footer-contact__item{display:grid;gap:2px}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:rgba(232,225,211,.5);
}
.footer-contact__value{
  font-size:14.5px;
  line-height:1.7;
  color:#F4EDDF;
  word-break:break-word;
}
.footer-note{
  margin-top:18px;
  font-size:12.5px;
  line-height:1.75;
  color:rgba(232,225,211,.6);
  border-left:2px solid var(--gold);
  padding-left:12px;
}
.site-footer__base{
  display:flex;
  flex-wrap:wrap;
  gap:8px 24px;
  align-items:center;
  justify-content:space-between;
  padding-block:18px;
  border-top:1px solid rgba(183,189,192,.24);
}
.footer-base__text{
  font-size:12.5px;
  color:rgba(232,225,211,.6);
}

/* ---------- 8. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:13px 24px;
  border:1px solid var(--dai);
  border-radius:999px;
  background-color:var(--dai);
  color:var(--paper-3);
  font-size:15px;
  font-weight:500;
  letter-spacing:.06em;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn:hover{
  background-color:var(--cinnabar);
  border-color:var(--cinnabar);
  color:#FCFAF6;
  transform:translateY(-2px);
}
.btn--ghost{
  background-color:transparent;
  color:var(--dai);
  border-color:var(--silver);
}
.btn--ghost:hover{
  background-color:transparent;
  color:var(--ink);
  border-color:var(--gold);
  transform:translateY(-2px);
}
.btn--gold{
  background-color:transparent;
  color:var(--gold);
  border-color:var(--gold);
}
.btn--gold:hover{
  background-color:var(--gold);
  border-color:var(--gold);
  color:var(--rain);
  transform:translateY(-2px);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb{margin-block:18px 0}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--mist);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__link{color:var(--mist);transition:color .2s ease}
.breadcrumb__link:hover{color:var(--cinnabar)}
.breadcrumb__sep{color:var(--silver)}

/* ---------- 10. 资料卡 ---------- */
.card-grid{
  display:grid;
  gap:clamp(16px,2.4vw,26px);
  grid-template-columns:repeat(auto-fit,minmax(258px,1fr));
}
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  padding:22px 22px 20px;
  background-color:var(--paper-3);
  border:1px solid var(--silver);
  border-radius:20px 6px 22px 8px;
  transition:transform .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-2px);border-color:var(--gold)}
.card__head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:12px;
}
.card__text{
  margin-top:8px;
  font-size:15px;
  line-height:1.8;
  color:var(--mist);
}
.card__meta{
  margin-top:auto;
  padding-top:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
}
.card__pin{
  position:relative;
  flex:0 0 26px;
  width:26px;
  height:26px;
  border:1px solid var(--silver);
  border-radius:6px 6px 2px 2px;
  background-color:transparent;
  transition:border-color .2s ease,background-color .2s ease;
}
.card__pin::after{
  content:"";
  position:absolute;
  inset:6px 7px;
  border:1px solid var(--mist);
  border-bottom:0;
  transition:background-color .2s ease,border-color .2s ease;
}
.card__pin:hover{border-color:var(--gold)}
.card__pin[aria-pressed="true"]{border-color:var(--cinnabar);background-color:rgba(168,44,31,.09)}
.card__pin[aria-pressed="true"]::after{background-color:var(--cinnabar);border-color:var(--cinnabar)}

/* ---------- 11. 标签 ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-block;
  padding:5px 11px;
  border:1px solid var(--silver);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--mist);
}
.tag--red{
  color:var(--cinnabar);
  border-color:var(--cinnabar);
  background-color:rgba(168,44,31,.06);
}
.tag--gold{
  color:var(--gold);
  border-color:var(--gold);
  background-color:rgba(185,138,46,.09);
}
.tag--mist{
  color:var(--dai);
  border-color:var(--dai);
  background-color:transparent;
}

/* ---------- 12. 短句卡片 ---------- */
.callout{
  padding:18px 20px;
  background-color:var(--paper-3);
  border:1px solid var(--silver);
  border-left:3px solid var(--dai);
  border-radius:6px 18px 18px 6px;
}
.callout--red{
  border-left-color:var(--cinnabar);
  background-color:rgba(168,44,31,.05);
}
.callout__title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:17px;
  line-height:1.4;
}
.callout__text{
  margin-top:6px;
  font-size:14px;
  line-height:1.8;
  color:var(--ink-soft);
}

/* ---------- 13. 索引行 ---------- */
.index-list{border-top:1px solid var(--silver)}
.index-item{
  display:grid;
  grid-template-columns:64px minmax(0,1fr);
  gap:16px;
  padding:20px 0;
  border-bottom:1px solid var(--silver);
}
.index-item__no{
  padding-top:4px;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--gold);
}
.index-item__title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(18px,2.2vw,22px);
  line-height:1.4;
}
.index-item__desc{
  margin-top:6px;
  font-size:14px;
  line-height:1.75;
  color:var(--mist);
  max-width:52ch;
}

/* ---------- 14. 横向抽拉带 ---------- */
.hscroll{
  position:relative;
  overflow-x:auto;
  overflow-y:hidden;
  scroll-snap-type:x proximity;
  -webkit-overflow-scrolling:touch;
  scrollbar-color:var(--silver) transparent;
  padding-bottom:12px;
}
.hscroll::-webkit-scrollbar{height:6px}
.hscroll::-webkit-scrollbar-thumb{background-color:var(--silver);border-radius:999px}
.hscroll::-webkit-scrollbar-track{background-color:transparent}
.hscroll__track{
  display:flex;
  gap:clamp(14px,2vw,22px);
  min-width:max-content;
  padding-inline:4px;
}
.hscroll__item{
  flex:0 0 auto;
  width:min(78vw,300px);
  scroll-snap-align:start;
}

/* ---------- 15. 影像容器 ---------- */
.media{margin:0;display:block}
.media__frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:4 / 3;
  background-color:var(--paper-2);
  border-radius:22px 6px 26px 8px;
}
.media--wide .media__frame{aspect-ratio:16 / 9}
.media--tall .media__frame{aspect-ratio:3 / 4}
.media--square .media__frame{aspect-ratio:1 / 1}
.media__frame > img,
.media__frame > svg,
.media__frame > video,
.media__frame > picture{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media__ph{
  position:absolute;
  inset:0;
  background-image:
    radial-gradient(140% 70% at 12% 108%,rgba(46,74,82,.45),transparent 62%),
    radial-gradient(90% 52% at 82% 100%,rgba(27,25,23,.28),transparent 70%),
    repeating-linear-gradient(180deg,rgba(252,250,246,.5) 0 2px,rgba(183,189,192,.26) 2px 6px),
    linear-gradient(180deg,#E9DFCB,#CFC3AC);
}
:root[data-theme="ink"] .media__ph{
  background-image:
    radial-gradient(140% 70% at 12% 108%,rgba(127,163,171,.34),transparent 62%),
    radial-gradient(90% 52% at 82% 100%,rgba(0,0,0,.4),transparent 70%),
    repeating-linear-gradient(180deg,rgba(237,230,216,.08) 0 2px,rgba(10,20,25,.35) 2px 6px),
    linear-gradient(180deg,#223238,#16242B);
}
.media__caption{
  margin-top:9px;
  font-size:12.5px;
  line-height:1.7;
  letter-spacing:.02em;
  color:var(--mist);
}

/* ---------- 16. 数字指标 ---------- */
.stat-row{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:18px;
  border-top:1px solid var(--silver);
  padding-top:20px;
}
.stat__num{
  font-family:var(--font-mono);
  font-size:clamp(24px,3vw,34px);
  font-weight:500;
  line-height:1.2;
  color:var(--dai);
}
.stat__label{
  margin-top:4px;
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--mist);
}

/* ---------- 17. 进入视口显现 ---------- */
.reveal{
  opacity:0;
  transform:translateY(8px);
  transition:opacity .42s ease,transform .42s ease;
}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 18. 响应式 ---------- */
@media (max-width:1024px){
  .site-footer__inner{grid-template-columns:1fr 1fr}
  .footer-col--contact{grid-column:1 / -1}
}

@media (max-width:900px){
  .split{grid-template-columns:1fr}
  .split__offset{margin-top:0}

  .masthead{
    flex-direction:column;
    align-items:center;
    gap:14px;
    padding:18px 0 12px;
  }
  .masthead__tools{
    position:static;
    transform:none;
    flex-wrap:wrap;
    justify-content:center;
  }
  .nav-toggle{display:inline-flex}
  .masthead__navrow{display:block}
  .site-nav{
    display:none;
    margin-top:12px;
    border-top:1px solid var(--silver);
    padding-top:8px;
  }
  .site-header[data-open] .site-nav{display:block}
  .site-nav__list{
    flex-direction:column;
    gap:0;
    align-items:stretch;
    text-align:left;
  }
  .site-nav__link{
    display:block;
    padding:14px 4px;
    border-bottom:1px dashed var(--silver);
    font-size:18px;
  }
  .site-nav__link::after{display:none}
}

@media (max-width:640px){
  body{font-size:16px}
  .index-item{grid-template-columns:1fr;gap:6px}
  .index-item__no{padding-top:0}
  .site-footer__inner{grid-template-columns:1fr}
  .site-footer__base{flex-direction:column;align-items:flex-start}
  .footer-notice__inner{padding-block:12px}
  .hscroll__item{width:80vw}
}

/* ---------- 19. 减少动态 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none;transition:none}
  .readline__bar{transition:none}
}