/* =========================================================
   鸿禾CN官方主站 / assets/site.css
   共享外壳：reset · 变量 · 中文排版 · 头部 · 页脚 · 基元组件
   ========================================================= */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
img,svg,video,canvas{display:block;max-width:100%;height:auto}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;border-spacing:0;width:100%}
summary{cursor:pointer}
hr{border:0}
[hidden]{display:none !important}
[id]{scroll-margin-top:120px}

/* ---------- 2. 变量 ---------- */
:root{
  --clay:#C25E27;
  --clay-deep:#9E4719;
  --pine:#12362E;
  --pine-soft:#1B4A3F;
  --anchor:#1E5A8A;
  --anchor-deep:#0E3A5C;
  --copper:#B9863F;
  --copper-line:rgba(184,134,63,.45);
  --paper:#F6F1E7;
  --paper-2:#EFE7D8;
  --loess:#E8C99B;
  --bronze:#5E6E63;
  --ink:#1A1A18;
  --flare:#E8843C;
  --white:#FFFCF6;

  --shell:1280px;
  --gutter:clamp(18px,4vw,48px);
  --radius:3px;
  --header-h:112px;

  --font-display:"PingFang SC","Hiragino Sans GB","Helvetica Neue",Arial,"Noto Sans SC",sans-serif;
  --font-ui:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --font-body:"Songti SC","SimSun","Noto Serif SC",Georgia,"Times New Roman",serif;
  --font-mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono","Courier New",monospace;

  --shadow-lift:0 18px 42px -26px rgba(14,58,92,.5);
  --shadow-soft:0 10px 26px -20px rgba(26,26,24,.6);
}

/* ---------- 3. 基础排版（中文） ---------- */
body{
  background-color:var(--paper);
  background-image:linear-gradient(180deg,rgba(232,201,155,.28) 0%,rgba(246,241,231,0) 46%);
  background-repeat:no-repeat;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:300;line-height:1.18;letter-spacing:-.01em;color:var(--ink)}
h1{font-size:clamp(34px,6vw,72px)}
h2{font-size:clamp(28px,4vw,48px)}
h3{font-weight:700;font-size:clamp(19px,2.2vw,26px);letter-spacing:0}
p{text-wrap:pretty}
a{transition:color .2s ease,border-color .2s ease}
strong{font-weight:700}
.mono{font-family:var(--font-mono);letter-spacing:.06em;font-variant-numeric:tabular-nums}
::selection{background:var(--loess);color:var(--ink)}
:focus-visible{outline:3px solid var(--flare);outline-offset:3px;border-radius:2px}

/* ---------- 4. 无障碍通用 ---------- */
.visually-hidden{
  position:absolute !important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.skip-link{
  position:absolute;left:var(--gutter);top:-72px;z-index:95;
  display:inline-flex;align-items:center;min-height:44px;padding:0 20px;
  background:var(--flare);color:#231407;border-radius:0 0 var(--radius) var(--radius);
  font-family:var(--font-ui);font-size:13.5px;font-weight:700;letter-spacing:.08em;
  transition:top .2s ease;
}
.skip-link:focus{top:0}

/* ---------- 5. 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--pine);
  color:var(--paper);
  border-bottom:1px solid rgba(184,134,63,.35);
  box-shadow:0 14px 34px -30px rgba(0,0,0,.9);
}
.site-header::after{
  content:"";display:block;height:5px;
  background-color:rgba(0,0,0,.22);
  background-image:repeating-linear-gradient(90deg,var(--copper) 0 1px,transparent 1px 20px);
  opacity:.85;
}
.header-shell{
  width:100%;max-width:var(--shell);margin:0 auto;
  padding:0 var(--gutter);
}
.header-meta{
  display:flex;align-items:center;flex-wrap:wrap;
  gap:10px clamp(14px,2.2vw,30px);
  min-height:56px;padding:9px 0;
  border-bottom:1px solid rgba(246,241,231,.14);
}
.brand-line{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-ui);font-size:13px;font-weight:700;
  letter-spacing:.14em;color:var(--paper);
}
.brand-line__text{white-space:nowrap}
.brand-mark{
  position:relative;flex:0 0 auto;width:15px;height:15px;
  border:1px solid var(--copper);border-radius:50%;
}
.brand-mark::before{
  content:"";position:absolute;inset:4px;background:var(--loess);border-radius:50%;
}
.brand-mark::after{
  content:"";position:absolute;left:50%;top:100%;width:1px;height:6px;
  background:var(--copper);transform:translateX(-50%);
}
.meta-list{
  display:flex;align-items:center;flex-wrap:wrap;
  gap:8px clamp(12px,2vw,26px);
  margin-left:auto;
  font-family:var(--font-ui);font-size:12px;letter-spacing:.08em;
  color:rgba(246,241,231,.7);
}
.meta-list__item{display:inline-flex;align-items:center;gap:7px}
.meta-list__item--support{color:rgba(246,241,231,.62)}
.meta-key{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--copper);
}
.meta-val{
  font-family:var(--font-mono);font-weight:700;font-size:13px;letter-spacing:.06em;
  color:var(--loess);
}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border:1px solid transparent;border-radius:var(--radius);
  font-family:var(--font-ui);font-size:14px;font-weight:700;letter-spacing:.08em;
  white-space:nowrap;cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn--cta{background:var(--clay);color:var(--paper)}
.btn--cta:hover{background:var(--flare);color:#231407}
.btn--cta:active{transform:translateY(1px)}
.btn--solid{background:var(--pine);color:var(--paper)}
.btn--solid:hover{background:var(--anchor-deep)}
.btn--ghost{background:transparent;border-color:rgba(246,241,231,.32);color:var(--paper)}
.btn--ghost:hover{border-color:var(--loess);color:var(--loess);background:rgba(232,201,155,.08)}
.btn--quiet{background:transparent;border-color:rgba(26,26,24,.2);color:var(--ink)}
.btn--quiet:hover{border-color:var(--clay);color:var(--clay-deep)}

/* 移动导航按钮 */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  min-height:44px;min-width:44px;padding:0 13px;
  border:1px solid rgba(246,241,231,.28);border-radius:var(--radius);
  color:var(--paper);font-family:var(--font-ui);font-size:12px;letter-spacing:.14em;
}
.nav-toggle:hover{border-color:var(--loess);color:var(--loess)}
.nav-toggle__bars{
  position:relative;display:block;width:16px;height:11px;
  border-top:1.5px solid currentColor;border-bottom:1.5px solid currentColor;
}
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;top:50%;height:1.5px;
  background:currentColor;transform:translateY(-50%);
}
.nav-toggle[aria-expanded="true"]{border-color:var(--flare);color:var(--flare)}

/* 下层主栏 */
.site-nav{
  display:flex;align-items:center;flex-wrap:wrap;
  gap:10px clamp(16px,2.4vw,34px);
  padding:4px 0 15px;
}
.site-nav__list{
  display:flex;align-items:center;flex-wrap:wrap;
  gap:clamp(8px,2.2vw,32px);
}
.site-nav__item{position:relative}
.site-nav__link{
  position:relative;display:inline-flex;align-items:center;
  min-height:44px;padding:0 2px;
  font-family:var(--font-ui);font-size:15px;letter-spacing:.06em;
  color:rgba(246,241,231,.82);
  transition:color .2s ease;
}
.site-nav__link::after{
  content:"";width:6px;height:6px;margin-left:10px;border-radius:50%;
  background:var(--copper);opacity:0;
  transition:opacity .2s ease,transform .24s ease;
}
.site-nav__link:hover{color:var(--paper)}
.site-nav__link:hover::after{opacity:1;transform:translateY(2px)}
.site-nav__link[aria-current="page"]{color:var(--loess)}
.site-nav__link[aria-current="page"]::after{
  opacity:1;background:var(--flare);transform:translateY(2px);
}
.site-nav__link[aria-current="page"]::before{
  content:"";position:absolute;left:2px;right:14px;bottom:7px;height:2px;background:var(--flare);
}
.site-nav__note{
  margin-left:auto;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  color:rgba(232,201,155,.62);
}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(48px,7vw,96px);
  background:var(--pine);color:var(--paper);
}
.footer-scale{
  height:12px;
  background-color:rgba(0,0,0,.2);
  background-image:repeating-linear-gradient(90deg,var(--copper) 0 2px,transparent 2px 20px);
  border-bottom:1px solid var(--copper-line);
  opacity:.85;
}
.footer-scale--end{border-bottom:0;border-top:1px solid var(--copper-line)}
.footer-shell{
  width:100%;max-width:var(--shell);margin:0 auto;
  padding:clamp(36px,5vw,64px) var(--gutter) clamp(22px,3vw,34px);
  display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.6fr);
  gap:clamp(24px,3vw,48px);
}
.footer-brand{min-width:0}
.footer-brand__mark{
  font-family:var(--font-display);font-weight:200;
  font-size:clamp(30px,3.6vw,42px);line-height:1.08;letter-spacing:-.01em;
  color:var(--paper);
}
.footer-brand__line{
  margin-top:12px;font-family:var(--font-ui);font-size:12px;
  letter-spacing:.14em;color:rgba(246,241,231,.72);
}
.footer-brand__version{
  margin-top:7px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.16em;color:var(--loess);
}
.footer-brand__motto{
  margin-top:15px;max-width:30ch;font-size:14px;line-height:1.75;
  color:rgba(246,241,231,.58);
}
.footer-col{min-width:0}
.footer-col__title{
  margin-bottom:14px;padding-bottom:10px;
  border-bottom:1px solid rgba(184,134,63,.3);
  font-family:var(--font-mono);font-weight:700;font-size:11px;
  letter-spacing:.2em;color:var(--copper);text-transform:uppercase;
}
.footer-list{display:flex;flex-direction:column;gap:2px}
.footer-list a{
  display:inline-flex;align-items:center;gap:9px;
  min-height:38px;
  font-family:var(--font-ui);font-size:14px;letter-spacing:.04em;
  color:rgba(246,241,231,.78);
}
.footer-list a::before{
  content:"";flex:0 0 auto;width:5px;height:5px;border-radius:50%;
  background:var(--copper);opacity:.5;
  transition:opacity .2s ease,transform .2s ease;
}
.footer-list a:hover{color:var(--loess)}
.footer-list a:hover::before{opacity:1;transform:translateX(3px)}
.footer-contact{min-width:0}
.footer-contact__list{display:flex;flex-direction:column;gap:11px}
.footer-contact__list li{display:flex;align-items:baseline;gap:10px}
.footer-key{
  flex:0 0 auto;min-width:34px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--copper);
}
.footer-val{
  font-family:var(--font-ui);font-size:13.5px;line-height:1.65;
  color:rgba(246,241,231,.82);word-break:break-word;
}
.footer-contact__note{
  margin-top:16px;max-width:44ch;
  font-size:12.5px;line-height:1.8;color:rgba(246,241,231,.55);
}
.footer-base{
  width:100%;max-width:var(--shell);margin:0 auto;
  padding:16px var(--gutter) 24px;
  display:flex;align-items:center;flex-wrap:wrap;gap:8px 26px;
  border-top:1px solid rgba(246,241,231,.14);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;
  color:rgba(246,241,231,.55);
}
.footer-base__icp{color:rgba(246,241,231,.62)}
.footer-base__closing{color:var(--copper)}
.footer-base__year{margin-left:auto}

/* ---------- 7. 布局基元 ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter)}
.section{padding:clamp(48px,7vw,96px) 0}
.section--paper{background:var(--paper)}
.section--paper-2{background:var(--paper-2)}
.section--pine{background:var(--pine);color:var(--paper)}
.section--deep{
  background:linear-gradient(150deg,var(--pine) 0%,var(--anchor-deep) 62%,#0B2B44 100%);
  color:var(--paper);
}
.section--glass{
  background:linear-gradient(140deg,rgba(232,201,155,.42) 0%,rgba(246,241,231,.85) 48%,rgba(30,90,138,.14) 100%);
}
.section--pine h1,.section--pine h2,.section--pine h3,.section--deep h1,.section--deep h2,.section--deep h3{color:var(--paper)}

.section__head{
  display:flex;align-items:flex-end;flex-wrap:wrap;gap:14px 32px;
  margin-bottom:clamp(22px,3vw,40px);
}
.section__title{
  font-family:var(--font-display);font-weight:300;
  font-size:clamp(28px,4vw,52px);line-height:1.12;letter-spacing:-.01em;
}
.section__lead{
  max-width:62ch;font-size:16.5px;line-height:1.8;color:#3A3A34;
}
.section--pine .section__lead,.section--deep .section__lead{color:rgba(246,241,231,.78)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  color:var(--clay);text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--copper)}
.section--pine .eyebrow,.section--deep .eyebrow{color:var(--loess)}

.lead{font-size:clamp(17px,2vw,21px);line-height:1.78;color:#33332E}
.prose{max-width:66ch}
.prose > * + *{margin-top:1em}
.prose h3{margin-top:1.8em}
.prose ul,.prose ol{margin-top:1em;padding-left:1.1em}
.prose li{list-style:disc;margin-top:.5em;font-family:var(--font-ui);font-size:16px;line-height:1.8}
.prose ol li{list-style:decimal}
.prose a{color:var(--anchor);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--clay)}
.stack-16 > * + *{margin-top:16px}
.stack-24 > * + *{margin-top:24px}

.grid-12{
  display:grid;grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.2vw,28px);
}
.span-1{grid-column:span 1}
.span-2{grid-column:span 2}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-10{grid-column:span 10}
.span-11{grid-column:span 11}
.span-12{grid-column:span 12}

/* ---------- 8. 基础组件 ---------- */
.anchor-rule{
  display:inline-block;width:2px;height:26px;
  background:linear-gradient(180deg,var(--clay),var(--copper));
  position:relative;vertical-align:middle;
}
.anchor-rule::after{
  content:"";position:absolute;left:50%;bottom:-8px;width:7px;height:7px;
  border-radius:50%;background:var(--clay);transform:translateX(-50%);
}
.tick-line{
  height:10px;
  background-color:rgba(0,0,0,.05);
  background-image:repeating-linear-gradient(90deg,var(--copper) 0 1px,transparent 1px 16px);
  border-top:1px solid var(--copper-line);
  border-bottom:1px solid var(--copper-line);
}

.card{
  position:relative;min-width:0;
  background:var(--white);
  border:1px solid rgba(26,26,24,.1);
  border-radius:var(--radius);
  padding:clamp(18px,2.2vw,26px);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-lift);
  border-color:rgba(194,94,39,.35);
}
.card--glass{
  background:linear-gradient(155deg,rgba(246,241,231,.2),rgba(232,201,155,.08));
  border-color:rgba(246,241,231,.28);
  color:var(--paper);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
}
.card--pine{background:var(--pine);color:var(--paper);border-color:rgba(184,134,63,.35)}
.card--accent{border-left:3px solid var(--clay)}
.card__anchor{
  position:absolute;top:12px;left:0;width:24px;height:12px;
  border-top:2px solid var(--copper);border-left:2px solid var(--copper);
}
.card__title{
  font-family:var(--font-ui);font-weight:700;
  font-size:clamp(17px,1.8vw,21px);line-height:1.4;
}
.card__meta{
  margin-top:9px;font-family:var(--font-mono);font-size:11.5px;
  letter-spacing:.12em;color:var(--bronze);
}
.card__body{margin-top:12px;font-size:15.5px;line-height:1.75;color:#3A3A34}
.card--glass .card__body,.card--pine .card__body{color:rgba(246,241,231,.82)}
.card--glass .card__meta,.card--pine .card__meta{color:rgba(232,201,155,.75)}
.card__list{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.card__list li{
  font-family:var(--font-ui);font-size:14.5px;line-height:1.7;
  display:flex;gap:9px;align-items:baseline;
}
.card__list li::before{
  content:"";flex:0 0 auto;width:6px;height:6px;border-radius:50%;
  background:var(--copper);transform:translateY(-2px);
}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 10px;border-radius:2px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  background:var(--loess);color:#4A2E12;
}
.tag--copper{background:rgba(184,134,63,.22);color:#6E4C16}
.tag--anchor{background:rgba(30,90,138,.14);color:var(--anchor-deep)}
.tag--line{background:transparent;border:1px solid var(--copper-line);color:var(--bronze)}

.stat{display:flex;flex-direction:column;gap:8px}
.stat__num{
  font-family:var(--font-mono);font-weight:800;
  font-size:clamp(34px,5.4vw,68px);line-height:.95;letter-spacing:-.01em;
  color:var(--clay);
}
.stat__label{
  font-family:var(--font-ui);font-size:12.5px;letter-spacing:.14em;color:var(--bronze);
}
.stat--light .stat__num{color:var(--loess)}
.stat--light .stat__label{color:rgba(246,241,231,.7)}

.breadcrumbs{
  padding:16px 0 0;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;
  color:var(--bronze);
}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:9px}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:9px}
.breadcrumbs__link{
  color:var(--anchor);text-decoration:underline;
  text-decoration-color:rgba(30,90,138,.35);text-underline-offset:3px;
}
.breadcrumbs__link:hover{color:var(--clay)}
.breadcrumbs__sep{color:var(--copper)}
.breadcrumbs__current{color:var(--ink)}

.tabs{margin:0}
.tabs__list{
  display:flex;flex-wrap:wrap;gap:6px;padding:6px;
  background:linear-gradient(120deg,rgba(30,90,138,.14),rgba(232,201,155,.24));
  border:1px solid rgba(18,54,46,.12);border-radius:var(--radius);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.tabs__tab{
  min-height:44px;padding:0 18px;border-radius:2px;
  border:1px solid transparent;
  font-family:var(--font-ui);font-size:14px;letter-spacing:.06em;color:#33413B;
  transition:background-color .2s ease,color .2s ease,transform .24s ease;
}
.tabs__tab:hover{background:rgba(255,255,255,.55)}
.tabs__tab[aria-selected="true"]{
  background:var(--pine);color:var(--paper);border-color:var(--pine);
}
.tabs__panel{margin-top:22px}
.tabs__panel[hidden]{display:none !important}

.table-wrap{
  overflow-x:auto;border:1px solid rgba(18,54,46,.14);
  border-radius:var(--radius);background:var(--white);
}
.table{min-width:640px;font-family:var(--font-ui);font-size:14px}
.table caption{
  padding:14px 18px;text-align:left;border-bottom:1px solid rgba(18,54,46,.12);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;color:var(--bronze);
}
.table th{
  padding:14px 18px;text-align:left;white-space:nowrap;
  background:var(--pine);color:var(--paper);
  font-weight:700;font-size:13px;letter-spacing:.08em;
}
.table td{
  padding:14px 18px;vertical-align:top;
  border-top:1px solid rgba(18,54,46,.1);color:var(--ink);
  font-family:var(--font-ui);font-size:14px;line-height:1.7;
}
.table tbody tr:nth-child(even){background:rgba(232,201,155,.16)}
.table .num{font-family:var(--font-mono);font-weight:700;letter-spacing:.04em}

/* 图片容器：页面阶段直接放入 <img> 或 <picture> */
.figure{margin:0}
.figure--full{width:100%}
.media{
  position:relative;display:block;overflow:hidden;border-radius:var(--radius);
  aspect-ratio:16/9;
  background-image:linear-gradient(140deg,var(--loess) 0%,var(--paper-2) 52%,#D8C9AF 100%);
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media > img,.media > picture > img{
  width:100%;height:100%;object-fit:cover;
}
.media--contain > img{object-fit:contain}
.media--textured::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(45deg,rgba(18,54,46,.06) 0 2px,transparent 2px 7px);
}
.media__caption{
  margin-top:10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--bronze);
}

/* 显现与滚动进度（JS 协议） */
[data-reveal]{
  opacity:0;transform:translateY(18px);
  transition:opacity .4s ease,transform .4s ease;
}
[data-reveal].is-visible{opacity:1;transform:none}
.scroll-progress{
  position:fixed;left:0;top:0;right:0;height:3px;z-index:95;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--clay),var(--flare) 48%,var(--loess));
  pointer-events:none;
  transition:transform .12s linear;
}

/* ---------- 9. 响应式 ---------- */
@media (max-width:1080px){
  .footer-shell{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:900px){
  :root{--header-h:104px}
  .meta-list__item--support{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    display:none;flex-direction:column;align-items:stretch;
    gap:0;padding:0 0 16px;
  }
  .site-nav[data-open]{display:flex;animation:navDrop .24s ease both}
  .site-nav__list{
    flex-direction:column;align-items:stretch;gap:0;
    border-top:1px solid rgba(246,241,231,.14);
  }
  .site-nav__item{border-bottom:1px solid rgba(246,241,231,.1)}
  .site-nav__link{
    width:100%;justify-content:space-between;padding:0 4px;font-size:16px;
  }
  .site-nav__link::before{display:none}
  .site-nav__note{margin:14px 0 0;text-align:left}
  .grid-12{grid-template-columns:repeat(12,minmax(0,1fr))}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9{grid-column:span 12}
  .span-2{grid-column:span 6}
}
@media (max-width:640px){
  body{font-size:16px}
  .header-meta{gap:10px 12px;min-height:52px;padding:8px 0}
  .brand-line{flex:1 1 100%;font-size:11.5px;letter-spacing:.08em}
  .brand-line__text{white-space:normal}
  .meta-list{margin-left:0;flex:1 1 auto}
  .footer-shell{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-base{flex-direction:column;align-items:flex-start;gap:8px}
  .footer-base__year{margin-left:0}
  .span-2,.span-10,.span-11{grid-column:span 12}
  .table{min-width:520px}
}
@keyframes navDrop{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:none}
}
@keyframes panelIn{
  from{opacity:0;transform:translateX(14px)}
  to{opacity:1;transform:none}
}
.tabs__panel{animation:panelIn .24s ease both}

/* ---------- 10. 动效偏好 ---------- */
@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;
  }
  [data-reveal]{opacity:1;transform:none}
  .card:hover{transform:none}
}