/* ============================================================
   顺发体育 · 共享样式表 /assets/site.css
   00 变量  01 重置  02 基础排版  03 工具  04 页头  05 页脚
   06 通用组件  07 图片容器  08 动效  09 响应式  10 无障碍
   ============================================================ */

/* ---------- 00 变量 ---------- */
:root{
  --c-ink:#071C17;
  --c-ink-2:#0B2A22;
  --c-ink-3:#123A2F;
  --c-cream:#F3EBDD;
  --c-cream-2:#E8DDC8;
  --c-paper:#F7F4EC;
  --c-mint:#6BFFC4;
  --c-mint-2:#3FCF9A;
  --c-orange:#FF8A3D;
  --c-muted:#9DB8AC;
  --c-line:#2E5B4C;
  --c-line-soft:rgba(46,91,76,.55);
  --c-line-faint:rgba(46,91,76,.28);
  --c-ink-deep:#04150F;

  --shell:1200px;
  --read:680px;
  --gutter:clamp(1rem,4vw,3rem);
  --header-h:64px;
  --radius:2px;

  --font-display:"Noto Sans SC","Archivo Black","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular",ui-monospace,"JetBrains Mono",Consolas,"Liberation Mono",monospace;

  --dur:200ms;
  --dur-slow:400ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-1:0 1px 0 rgba(0,0,0,.35), 0 22px 44px -34px rgba(0,0,0,.9);
}

/* ---------- 01 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0}
table{border-collapse:collapse;width:100%}
a{color:inherit}
[id]{scroll-margin-top:clamp(96px,14vh,150px)}
::selection{background:var(--c-mint);color:var(--c-ink-deep)}

/* ---------- 02 基础排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--c-ink);
  background-image:
    radial-gradient(120% 55% at 88% -12%, rgba(63,207,154,.10), transparent 62%),
    repeating-linear-gradient(90deg, rgba(46,91,76,.16) 0 1px, transparent 1px 88px);
  color:var(--c-paper);
  font-family:var(--font-sans);
  font-size:1rem;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.06;
  letter-spacing:-.02em;
  color:var(--c-paper);
  text-wrap:balance;
}
h1{font-size:clamp(3.5rem,10vw,11rem);line-height:.92}
h2{font-size:clamp(1.8rem,4vw,3rem)}
h3{font-size:clamp(1.15rem,2vw,1.5rem);letter-spacing:-.01em}
h4{font-size:1.05rem;font-weight:700;letter-spacing:0;line-height:1.5}
p{text-wrap:pretty}
a{color:var(--c-mint);text-decoration-color:rgba(107,255,196,.45);text-underline-offset:3px;transition:color var(--dur) var(--ease)}
a:hover{color:#A8FFDD}
strong,b{font-weight:700;color:var(--c-paper)}
small{font-size:.8125rem}
hr{border:0;border-top:1px solid var(--c-line-faint);margin:0}

/* ---------- 03 工具 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.sr-only{
  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;
}
.skip-link{
  position:absolute;left:var(--gutter);top:-100px;z-index:200;
  display:inline-block;padding:.7rem 1.1rem;
  background:var(--c-mint);color:var(--c-ink-deep);
  font-family:var(--font-mono);font-size:.78rem;letter-spacing:.06em;
  text-decoration:none;border-radius:var(--radius);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus-visible,.skip-link:focus{top:.75rem;color:var(--c-ink-deep)}
.rule{height:1px;background:var(--c-line-faint);border:0}

/* ---------- 04 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,28,23,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
}
.site-header.is-scrolled{box-shadow:0 14px 34px -26px #000}
.scroll-meter{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  pointer-events:none;z-index:3;overflow:hidden;
}
.scroll-meter__bar{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--c-mint-2),var(--c-mint));
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform 120ms linear;
}
.header-rail{position:relative;z-index:2}
.header-rail__inner{
  display:flex;align-items:center;gap:clamp(.6rem,2vw,1.75rem);
  min-height:var(--header-h);
}
.brand{
  display:inline-flex;align-items:center;gap:.65rem;
  text-decoration:none;color:var(--c-paper);
  flex:0 0 auto;
}
.brand__mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:2.3rem;height:2.3rem;flex:0 0 auto;
  border:1px solid var(--c-line);
  background:linear-gradient(150deg,var(--c-ink-3),var(--c-ink-2));
  color:var(--c-mint);
  font-family:var(--font-mono);font-size:.82rem;font-weight:500;letter-spacing:.04em;
  border-radius:var(--radius);
}
.brand__text{display:flex;flex-direction:column;line-height:1.1}
.brand__name{
  font-family:var(--font-display);font-weight:900;
  font-size:1.02rem;letter-spacing:.02em;color:var(--c-paper);
}
.brand__sub{
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.16em;
  color:var(--c-muted);margin-top:.22rem;
}
.brand:hover .brand__mark{border-color:var(--c-mint);color:var(--c-ink-deep);background:var(--c-mint)}
.brand--footer .brand__mark{width:2.9rem;height:2.9rem;font-size:1rem}
.brand--footer .brand__name{font-size:1.3rem}

.header-rail__meta{
  display:flex;align-items:center;gap:.9rem;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;
  color:var(--c-muted);margin:0;
}
.badge-period{
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.28rem .6rem;
  border:1px solid rgba(107,255,196,.35);
  border-radius:var(--radius);
  background:rgba(107,255,196,.07);
  color:var(--c-mint);white-space:nowrap;
}
.badge-period__dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--c-mint);box-shadow:0 0 0 3px rgba(107,255,196,.15);
  animation:pulse 2.6s var(--ease) infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.coord{color:var(--c-line);white-space:nowrap}

.header-rail__links{
  margin-left:auto;display:flex;align-items:center;gap:.35rem;
}
.rail-link{
  display:inline-block;padding:.4rem .6rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.06em;
  color:var(--c-muted);text-decoration:none;
  border:1px solid transparent;border-radius:var(--radius);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.rail-link:hover{color:var(--c-paper);border-color:var(--c-line)}
.rail-link--accent{color:var(--c-orange);border-color:rgba(255,138,61,.4)}
.rail-link--accent:hover{color:var(--c-ink-deep);background:var(--c-orange);border-color:var(--c-orange)}

.nav-toggle{
  display:none;align-items:center;gap:.5rem;
  margin-left:auto;padding:.55rem .75rem;
  border:1px solid var(--c-line);border-radius:var(--radius);
  color:var(--c-paper);cursor:pointer;
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.08em;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--c-mint);color:var(--c-mint)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle__bars i{display:block;height:1.5px;width:100%;background:currentColor;transition:transform var(--dur) var(--ease)}
.site-header[data-open] .nav-toggle__bars i:first-child{transform:translateY(2.75px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars i:last-child{transform:translateY(-2.75px) rotate(-45deg)}
.nav-toggle__label{white-space:nowrap}

.header-nav{
  background:linear-gradient(180deg,var(--c-ink-2),#09231C);
  border-top:1px solid var(--c-line);
}
.header-nav__inner{
  display:flex;align-items:center;justify-content:space-between;gap:2rem;
}
.header-nav__note{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;
  color:var(--c-line);white-space:nowrap;margin:0;
}
.site-nav{min-width:0}
.site-nav__list{display:flex;flex-wrap:wrap;align-items:stretch}
.site-nav__item{display:block}
.site-nav__link{
  display:inline-flex;align-items:baseline;gap:.5rem;
  padding:.9rem clamp(.55rem,1.4vw,1.2rem);
  position:relative;
  font-size:.94rem;font-weight:500;
  color:var(--c-muted);text-decoration:none;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.site-nav__num{
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.08em;
  color:var(--c-line);transition:color var(--dur) var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:var(--c-mint);transform:scaleX(0);transform-origin:0 50%;
  transition:transform var(--dur) var(--ease);
}
.site-nav__link:hover{color:var(--c-paper);background:rgba(107,255,196,.04)}
.site-nav__link:hover .site-nav__num{color:var(--c-mint-2)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--c-mint)}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--c-mint-2)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}

/* ---------- 05 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(4rem,10vw,7rem);
  background:linear-gradient(180deg,var(--c-ink-2),#061814 78%);
  border-top:1px solid var(--c-line);
  color:var(--c-paper);
}
.footer-mark{
  position:absolute;right:-.06em;bottom:-.34em;
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(9rem,24vw,19rem);line-height:.8;
  color:rgba(107,255,196,.05);
  pointer-events:none;user-select:none;
}
.footer-main{
  position:relative;z-index:1;
  display:grid;gap:clamp(2rem,4vw,3rem);
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.6fr) minmax(0,.95fr);
  padding-block:clamp(2.5rem,6vw,4.5rem);
}
.footer-brand{display:grid;gap:1rem;align-content:start}
.footer-tagline{
  font-size:.92rem;line-height:1.7;color:var(--c-muted);
  max-width:30ch;margin:0;
}
.footer-index{
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.16em;
  color:var(--c-line);margin:0;
}
.footer-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1.5rem;align-content:start;
}
.footer-col{min-width:0}
.footer-col__title{
  font-family:var(--font-mono);font-weight:500;
  font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--c-mint-2);
  padding-bottom:.6rem;margin-bottom:.75rem;
  border-bottom:1px solid var(--c-line-faint);
}
.footer-list{display:grid;gap:.5rem}
.footer-link{
  display:inline-block;
  font-size:.92rem;color:var(--c-muted);text-decoration:none;
  padding-block:.1rem;
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-link:hover{color:var(--c-mint);transform:translateX(2px)}
.footer-contact{display:grid;gap:0;align-content:start}
.footer-contact__row{display:grid;gap:.1rem;padding-block:.35rem}
.footer-contact__label{
  font-family:var(--font-mono);font-size:.64rem;letter-spacing:.14em;
  color:var(--c-line);
}
.footer-contact__value{
  font-size:.88rem;line-height:1.6;color:var(--c-paper);
  word-break:break-word;
}
.footer-legal{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;align-items:center;gap:.75rem 1.5rem;
  padding-block:1.15rem 1.5rem;
  border-top:1px solid var(--c-line-faint);
}
.footer-legal__meta,.footer-legal__note{
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.05em;
  color:var(--c-muted);margin:0;
}
.footer-legal__note{color:var(--c-line);flex:1 1 240px;min-width:0}
.footer-legal__icp{color:var(--c-muted)}
.to-top{
  display:inline-flex;align-items:center;gap:.45rem;
  margin-left:auto;
  padding:.5rem .8rem;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;
  color:var(--c-muted);
  border:1px solid var(--c-line);border-radius:var(--radius);
  cursor:pointer;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.to-top:hover{color:var(--c-ink-deep);background:var(--c-mint);border-color:var(--c-mint)}

/* ---------- 06 通用组件 ---------- */
/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.85rem 1.35rem;
  font-size:.95rem;font-weight:600;line-height:1.2;
  text-decoration:none;border:1px solid transparent;border-radius:var(--radius);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--mint{background:var(--c-mint);color:var(--c-ink-deep);border-color:var(--c-mint)}
.btn--mint:hover{background:#8CFFD5;border-color:#8CFFD5;color:var(--c-ink-deep)}
.btn--line{background:transparent;color:var(--c-paper);border-color:var(--c-line)}
.btn--line:hover{border-color:var(--c-mint);color:var(--c-mint);background:rgba(107,255,196,.06)}

/* 面包屑 */
.breadcrumbs{
  padding-block:1rem .25rem;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.05em;
  color:var(--c-muted);
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:.45rem}
.breadcrumbs li{display:flex;align-items:center;gap:.45rem}
.breadcrumbs li+li::before{content:"/";color:var(--c-line)}
.breadcrumbs a{color:var(--c-muted);text-decoration:none}
.breadcrumbs a:hover{color:var(--c-mint)}
.breadcrumbs [aria-current="page"]{color:var(--c-paper)}

/* 章节 */
.section{position:relative;padding-block:clamp(2.5rem,6vw,5rem)}
.section__head{display:grid;gap:.7rem;margin-bottom:clamp(1.5rem,3vw,2.5rem);max-width:52rem}
.eyebrow{
  display:inline-flex;align-items:center;gap:.6rem;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--c-mint-2);margin:0;
}
.eyebrow::before{content:"";width:clamp(22px,4vw,54px);height:1px;background:currentColor;flex:0 0 auto}
.chapter-num{
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.16em;
  color:var(--c-orange);
}
.lede{
  font-size:clamp(1rem,1.6vw,1.15rem);line-height:1.7;color:var(--c-muted);
  max-width:44rem;margin:0;
}
.section--paper{background:var(--c-cream);color:#16241F}
.section--paper h2,.section--paper h3,.section--paper h4{color:var(--c-ink-2)}
.section--paper .lede,.section--paper p{color:#3A4B44}
.section--paper .eyebrow{color:#1D6B52}
.section--paper a{color:#0F5C46}

/* 网格 */
.grid{display:grid;gap:clamp(1rem,2.4vw,2rem);align-items:start}
.grid--8-4{grid-template-columns:minmax(0,8fr) minmax(0,4fr)}
.grid--7-5{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

/* 面板与卡片 */
.panel{
  background:var(--c-ink-2);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  padding:clamp(1.1rem,2.4vw,1.75rem);
  box-shadow:var(--shadow-1);
}
.card{
  position:relative;
  display:grid;gap:.6rem;align-content:start;
  background:linear-gradient(170deg,var(--c-ink-3),var(--c-ink-2));
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  padding:clamp(1rem,2vw,1.4rem);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.card:hover{border-color:var(--c-mint-2);transform:translateY(-2px)}
.card__title{font-size:1.02rem;font-weight:700;line-height:1.45;margin:0;color:var(--c-paper)}
.card__meta{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.08em;
  color:var(--c-muted);margin:0;
}

/* 标签 */
.tag{
  display:inline-flex;align-items:center;gap:.3rem;
  padding:.2rem .5rem;
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.08em;
  color:var(--c-muted);
  border:1px solid var(--c-line);border-radius:var(--radius);
  white-space:nowrap;
}
.tag--change{color:var(--c-orange);border-color:rgba(255,138,61,.5);background:rgba(255,138,61,.08)}
.tag--data{color:var(--c-mint);border-color:rgba(107,255,196,.45);background:rgba(107,255,196,.07)}

/* 正文 */
.prose{max-width:var(--read);font-size:1.0625rem;line-height:1.78}
.prose>*+*{margin-top:1.1em}
.prose p{margin:0}
.prose ul,.prose ol{padding-left:1.15rem;list-style:disc}
.prose li+li{margin-top:.4em}
.prose a{color:var(--c-mint);text-decoration:underline;text-decoration-thickness:1px}
.prose strong{color:var(--c-paper)}

/* 锚点侧栏 */
.anchor-rail{position:sticky;top:calc(var(--header-h) + 2.25rem);align-self:start}
.anchor-rail__title{
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--c-muted);margin:0 0 .8rem;
}
.anchor-list{border-left:1px solid var(--c-line)}
.anchor-link{
  display:block;
  padding:.5rem 0 .5rem .9rem;
  margin-left:-1px;
  border-left:2px solid transparent;
  font-size:.88rem;line-height:1.5;
  color:var(--c-muted);text-decoration:none;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.anchor-link:hover{color:var(--c-paper);background:rgba(107,255,196,.05)}
.anchor-link[aria-current="true"]{color:var(--c-mint);border-left-color:var(--c-mint);background:rgba(107,255,196,.07)}

/* 期号印章 */
.stamp{
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:.15rem;
  width:5.4rem;height:5.4rem;flex:0 0 auto;
  border:1px solid var(--c-line);border-radius:50%;
  font-family:var(--font-mono);font-size:.6rem;line-height:1.3;letter-spacing:.08em;
  color:var(--c-mint-2);text-align:center;
  transform:rotate(-6deg);
}
.stamp strong{display:block;font-size:.82rem;color:var(--c-mint);letter-spacing:.04em}

/* ---------- 07 图片容器 ---------- */
.media-frame{
  position:relative;display:block;width:100%;
  overflow:hidden;isolation:isolate;
  background:linear-gradient(150deg,#0B2A22 0%,#123A2F 58%,#0B2A22 100%);
  border:1px solid var(--c-line);border-radius:var(--radius);
}
.media-frame::before{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg,rgba(107,255,196,.07) 0 1px,transparent 1px 32px),
    repeating-linear-gradient(90deg,rgba(107,255,196,.07) 0 1px,transparent 1px 32px);
  opacity:.75;
}
.media-frame img{position:relative;z-index:0;width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--auto{aspect-ratio:auto}
.media-frame__label{
  position:absolute;left:.75rem;bottom:.7rem;z-index:2;
  padding:.2rem .45rem;
  font-family:var(--font-mono);font-size:.64rem;letter-spacing:.08em;
  color:var(--c-mint);
  background:rgba(7,28,23,.78);
  border:1px solid var(--c-line);border-radius:var(--radius);
}

/* ---------- 08 动效 ---------- */
.js-reveal [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity var(--dur-slow) var(--ease),transform var(--dur-slow) var(--ease);
  will-change:opacity,transform;
}
.js-reveal [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 09 响应式 ---------- */
@media (max-width:1040px){
  .coord{display:none}
  .header-rail__links{display:none}
  .nav-toggle{display:inline-flex}
  .header-nav{display:none}
  .site-header[data-open] .header-nav{display:block;animation:navDrop var(--dur) var(--ease)}
  .header-nav__inner{display:block;padding-block:.5rem 1rem}
  .header-nav__note{display:none}
  .site-nav__list{flex-direction:column;flex-wrap:nowrap;gap:0}
  .site-nav__link{
    width:100%;justify-content:flex-start;
    padding:.85rem .25rem;
    border-bottom:1px solid var(--c-line-faint);
    font-size:1rem;
  }
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{
    padding-left:.85rem;
    box-shadow:inset 2px 0 0 var(--c-mint);
    background:rgba(107,255,196,.06);
  }
  .footer-main{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{grid-column:1 / -1}
  .footer-contact__row{grid-template-columns:5.5rem minmax(0,1fr);align-items:baseline;gap:.75rem}
  .anchor-rail{position:static;top:auto}
  .anchor-list{display:flex;flex-wrap:wrap;gap:.35rem;border-left:0}
  .anchor-link{
    border:1px solid var(--c-line);border-left:1px solid var(--c-line);
    border-radius:var(--radius);
    padding:.35rem .7rem;margin-left:0;font-size:.8rem;
  }
  .anchor-link[aria-current="true"]{border-color:var(--c-mint)}
}
@media (max-width:900px){
  .grid--8-4,.grid--7-5,.grid--3{grid-template-columns:minmax(0,1fr)}
  .grid--2{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:720px){
  .header-rail__inner{gap:.5rem;min-height:58px}
  .header-rail__meta{font-size:.64rem}
  .badge-period{padding:.2rem .45rem}
  .brand__sub{display:none}
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1.25rem}
  .footer-legal{gap:.5rem}
  .to-top{margin-left:0}
  h1{letter-spacing:-.03em}
}
@media (max-width:400px){
  .brand__name{font-size:.94rem}
  .brand__mark{width:2rem;height:2rem;font-size:.74rem}
  .nav-toggle{padding:.5rem .6rem}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
}
@keyframes navDrop{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ---------- 10 无障碍 ---------- */
:focus-visible{outline:2px solid var(--c-mint);outline-offset:3px;border-radius:2px}
.skip-link:focus-visible{outline-offset:2px}

@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;
  }
  .js-reveal [data-reveal]{opacity:1 !important;transform:none !important}
  .btn:hover,.card:hover,.footer-link:hover{transform:none}
  .site-header[data-open] .header-nav{animation:none}
}