/* ============================================================
   米兰赛场 · 共享样式 /assets/site.css
   赛场夜战 × 数据仪表盘
   ============================================================ */

/* 1. 设计令牌 ------------------------------------------------ */
:root{
  --red:#C8102E;
  --red-deep:#7A0C1E;
  --ink:#111111;
  --night:#1B1D21;
  --ivory:#F6F1E7;
  --gray:#8C8F94;
  --blue:#2D9CDB;
  --volt:#F2E900;
  --ice:#DCE3E8;
  --white:#FFFFFF;

  --line:rgba(17,17,17,.14);
  --line-strong:rgba(17,17,17,.30);
  --line-dark:rgba(220,227,232,.20);
  --glass-dark:rgba(17,17,17,.80);
  --glass-light:rgba(246,241,231,.72);

  --shell:1180px;
  --header-h:4.25rem;

  --radius-s:8px;
  --radius-m:16px;
  --radius-l:26px;
  --pill:999px;

  --shadow-1:0 10px 28px rgba(17,17,17,.10);
  --shadow-2:0 18px 48px rgba(17,17,17,.24);

  --font-sans:system-ui,-apple-system,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"Roboto Mono",Menlo,Consolas,"Courier New",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --skew:-12deg;
}

/* 2. 重置与中文排版基线 -------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-top:calc(var(--header-h) + 1.4rem);
  background:var(--ivory);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
main{display:block}
img,svg,video{display:block;max-width:100%}
img{height:auto}
button,input,select,textarea{font:inherit;color:inherit}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.2em}
a{color:var(--red);text-underline-offset:3px}
h1,h2,h3,h4,h5{margin:0 0 .55em;font-weight:900;line-height:1.12;letter-spacing:-.01em}
h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.04;letter-spacing:-.03em}
h2{font-size:clamp(1.5rem,3.4vw,2.25rem)}
h3{font-size:clamp(1.12rem,2vw,1.4rem)}
h4{font-size:1.02rem;letter-spacing:0}
strong,b{font-weight:800}
hr{border:0}
kbd{
  font-family:var(--font-mono);font-size:.74em;line-height:1;
  padding:.22em .4em;border-radius:4px;
  background:rgba(246,241,231,.14);border:1px solid var(--line-dark);color:inherit;
}
::selection{background:var(--red);color:#fff}

:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:6px}
.site-header :focus-visible,
.site-footer :focus-visible,
.section--night :focus-visible,
.section--ink :focus-visible,
.section--red :focus-visible,
.footer-legal :focus-visible{outline-color:var(--volt)}

/* 3. 通用工具 ------------------------------------------------ */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:clamp(1rem,4vw,2rem)}
.stack{display:grid;gap:var(--stack-gap,1rem)}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.muted{color:var(--gray)}
.rule{height:1px;background:var(--line);margin:0;border:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.section{position:relative;padding-block:clamp(3rem,7vw,6rem)}
.section--ivory{background:var(--ivory);color:var(--ink)}
.section--night{background:var(--night);color:var(--ivory)}
.section--ink{background:var(--ink);color:var(--ivory)}
.section--red{background:var(--red);color:#fff}
.section--night a,.section--ink a,.section--red a{color:var(--volt)}
.section__head{display:grid;gap:.55rem;max-width:64ch;margin-bottom:clamp(1.5rem,3vw,2.5rem)}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--font-mono);font-size:.72rem;font-weight:700;
  letter-spacing:.22em;text-transform:uppercase;color:var(--red);
}
.eyebrow::before{content:"";width:26px;height:2px;background:currentColor}
.section--night .eyebrow,.section--ink .eyebrow,.section--red .eyebrow{color:var(--volt)}
.lede{font-size:clamp(1rem,1.7vw,1.15rem);max-width:62ch;color:#3b3d42}
.section--night .lede,.section--ink .lede{color:rgba(246,241,231,.76)}
.section--red .lede{color:rgba(255,255,255,.86)}

.slant{
  height:clamp(26px,5vw,64px);
  background:var(--red);
  clip-path:polygon(0 100%,100% 0,100% 100%);
}

.grid{display:grid;gap:clamp(1rem,2.5vw,1.75rem)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* 框景容器：四角刻度 */
.frame{
  position:relative;border:1px solid var(--line-strong);
  border-radius:var(--radius-l);padding:clamp(1.25rem,3.2vw,2.75rem);
}
.frame::before,.frame::after{content:"";position:absolute;width:28px;height:28px;border:3px solid var(--red)}
.frame::before{top:-1px;left:-1px;border-right:0;border-bottom:0;border-top-left-radius:var(--radius-l)}
.frame::after{bottom:-1px;right:-1px;border-left:0;border-top:0;border-bottom-right-radius:var(--radius-l)}
.frame--dark{border-color:var(--line-dark)}
.frame--dark::before,.frame--dark::after{border-color:var(--volt)}

/* 4. 按钮 · 标签 · 卡片 -------------------------------------- */
.btn{
  display:inline-flex;align-items:center;gap:.45rem;
  font-weight:800;font-size:.88rem;line-height:1;
  padding:.7rem 1.05rem;border-radius:var(--pill);
  border:1px solid transparent;text-decoration:none;cursor:pointer;
  transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--sm{padding:.5rem .8rem;font-size:.8rem}
.btn--primary{background:var(--red);color:#fff;box-shadow:0 10px 24px rgba(200,16,46,.32)}
.btn--primary:hover{background:#a90d26;transform:translateY(-1px)}
.btn--volt{background:var(--volt);color:var(--ink)}
.btn--volt:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(242,233,0,.28)}
.btn--ghost{border-color:var(--line-strong);color:var(--ink);background:transparent}
.btn--ghost:hover{border-color:var(--red);color:var(--red)}
.btn--ghost-light{border-color:rgba(246,241,231,.34);color:var(--ivory);background:rgba(246,241,231,.06)}
.btn--ghost-light:hover{border-color:var(--volt);color:var(--volt)}

.chip{
  display:inline-flex;align-items:center;gap:.35rem;
  font-family:var(--font-mono);font-size:.72rem;font-weight:700;letter-spacing:.08em;
  padding:.3rem .6rem;border-radius:var(--pill);
  color:var(--red);border:1px solid currentColor;background:transparent;
}
.chip--blue{color:var(--blue);border-color:rgba(45,156,219,.5);background:rgba(45,156,219,.08)}
.chip--volt{color:var(--ink);background:var(--volt);border-color:transparent}

.card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:clamp(1rem,2.2vw,1.6rem);box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--line-strong)}
.card--dark{background:rgba(246,241,231,.06);border-color:var(--line-dark);color:var(--ivory)}
.card--dark:hover{background:rgba(246,241,231,.1)}
.glass{
  background:rgba(246,241,231,.14);border:1px solid var(--line-dark);
  border-radius:var(--radius-m);padding:clamp(.85rem,2vw,1.35rem);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}

/* 5. 数据仪表盘 ---------------------------------------------- */
.stat{display:grid;gap:.3rem}
.stat__value{
  font-family:var(--font-mono);font-weight:800;
  font-size:clamp(1.6rem,4vw,2.4rem);line-height:1;color:var(--red);
  font-variant-numeric:tabular-nums;
}
.stat__label{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--gray);
}
.section--night .stat__value,.section--ink .stat__value{color:var(--volt)}
.section--night .stat__label,.section--ink .stat__label{color:rgba(246,241,231,.6)}

/* 6. 分段切换（标签页） -------------------------------------- */
.tabs{display:grid;gap:1.1rem}
.tab-list{
  display:inline-flex;flex-wrap:wrap;gap:.3rem;padding:.3rem;
  background:rgba(17,17,17,.06);border:1px solid var(--line);border-radius:var(--pill);
}
.tab{
  font:inherit;font-weight:800;font-size:.85rem;line-height:1;
  padding:.55rem .95rem;border:0;border-radius:var(--pill);
  background:transparent;color:var(--ink);cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.tab:hover{color:var(--red)}
.tab[aria-selected="true"]{background:var(--red);color:#fff}
.section--night .tab-list,.section--ink .tab-list{background:rgba(246,241,231,.08);border-color:var(--line-dark)}
.section--night .tab,.section--ink .tab{color:var(--ivory)}
.section--night .tab[aria-selected="true"],.section--ink .tab[aria-selected="true"]{background:var(--volt);color:var(--ink)}
.tab-panel[hidden]{display:none}
.tab-panel{padding-top:.35rem}

/* 7. 时间轴 · 面包屑 · 正文 ---------------------------------- */
.axis{position:relative;display:grid;gap:1.1rem;padding-left:1.7rem}
.axis::before{
  content:"";position:absolute;left:.34rem;top:.45rem;bottom:.45rem;width:2px;
  background:linear-gradient(180deg,var(--red),var(--volt));
}
.axis__item{position:relative}
.axis__item::before{
  content:"";position:absolute;left:-1.7rem;top:.45rem;
  width:12px;height:12px;border-radius:50%;
  background:var(--ivory);border:3px solid var(--red);
}
.section--night .axis__item::before,.section--ink .axis__item::before{background:var(--night);border-color:var(--volt)}

.breadcrumbs{padding-block:1rem;font-size:.78rem;color:var(--gray)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:.4rem;list-style:none;margin:0;padding:0}
.breadcrumbs li{display:flex;align-items:center;gap:.4rem}
.breadcrumbs li+li::before{content:"/";color:var(--line-strong)}
.breadcrumbs a{color:inherit;text-decoration:none}
.breadcrumbs a:hover{color:var(--red);text-decoration:underline}
.breadcrumbs [aria-current="page"]{color:var(--ink);font-weight:700}

.prose{max-width:68ch}
.prose h2{margin-top:1.8em}
.prose h3{margin-top:1.5em}
.prose ul,.prose ol{padding-left:1.25em}
.prose a{color:var(--red);text-decoration-color:rgba(200,16,46,.42)}

/* 8. 图片容器（页面阶段放置占位） ---------------------------- */
.media{
  position:relative;overflow:hidden;border-radius:var(--radius-m);
  border:1px solid var(--line);aspect-ratio:16/9;
  background:linear-gradient(140deg,#26282d,#141519 70%);
}
.media>img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:4/5}
.media--portrait{aspect-ratio:3/4}
.media__caption{
  position:absolute;left:.75rem;right:.75rem;bottom:.75rem;
  padding:.5rem .7rem;border-radius:var(--radius-s);
  background:rgba(17,17,17,.74);border:1px solid var(--line-dark);
  color:var(--ivory);font-size:.76rem;line-height:1.5;
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.media__tag{position:absolute;top:.75rem;left:.75rem}
.media-grid{display:grid;gap:clamp(.6rem,1.6vw,1rem);grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}

/* 9. 头部：悬浮玻璃胶囊 -------------------------------------- */
.skip-link{
  position:fixed;top:.5rem;left:.6rem;z-index:200;
  transform:translateY(-180%);
  padding:.55rem .95rem;border-radius:var(--pill);
  background:var(--volt);color:var(--ink);font-weight:800;font-size:.85rem;
  text-decoration:none;transition:transform .18s var(--ease);
}
.skip-link:focus{transform:none}

.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:90;
  background:rgba(17,17,17,.08);pointer-events:none;
}
.scroll-progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--red),var(--volt));
}

.site-header{position:fixed;top:0;left:0;right:0;z-index:80;padding:.6rem clamp(.6rem,2.5vw,1.25rem)}
.site-header__inner{
  position:relative;display:flex;align-items:center;gap:clamp(.5rem,1.4vw,1.1rem);
  max-width:var(--shell);margin-inline:auto;min-height:var(--header-h);
  padding:.45rem .55rem .45rem .8rem;
  background:var(--glass-dark);color:var(--ivory);
  border:1px solid var(--line-dark);border-radius:var(--pill);
  box-shadow:0 14px 40px rgba(17,17,17,.26);
  -webkit-backdrop-filter:blur(16px) saturate(1.3);
  backdrop-filter:blur(16px) saturate(1.3);
}
.site-header__inner::after{
  content:"";position:absolute;left:8%;right:38%;bottom:-1px;height:2px;
  background:linear-gradient(90deg,transparent,var(--red),transparent);
  border-radius:var(--pill);pointer-events:none;
}

.brand{display:flex;align-items:center;gap:.6rem;flex:0 1 auto;min-width:0;color:inherit;text-decoration:none}
.brand__mark{
  position:relative;flex:0 0 auto;width:34px;height:34px;border-radius:11px;
  background:linear-gradient(140deg,var(--red),var(--red-deep));
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.18);
  overflow:hidden;
}
.brand__mark::before,.brand__mark::after{content:"";position:absolute;height:3px;border-radius:2px;transform:rotate(-24deg)}
.brand__mark::before{width:19px;top:12px;left:7px;background:var(--ivory)}
.brand__mark::after{width:13px;top:20px;left:10px;background:var(--volt)}
.brand__text{display:grid;gap:.05rem;min-width:0}
.brand__name{font-size:1.02rem;font-weight:900;letter-spacing:.02em;line-height:1.2;white-space:nowrap}
.brand__tagline{
  display:none;font-size:.68rem;line-height:1.3;color:rgba(246,241,231,.6);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:36ch;
}

.site-nav{display:flex;align-items:center;margin-left:auto}
.nav-list{display:flex;align-items:center;gap:.12rem;list-style:none;margin:0;padding:0}
.nav-link{
  display:block;padding:.46rem .72rem;border-radius:var(--pill);
  font-size:.9rem;font-weight:700;line-height:1.2;text-decoration:none;
  color:rgba(246,241,231,.78);
  transition:background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-link:hover{color:#fff;background:rgba(246,241,231,.1)}
.nav-link[aria-current="page"]{
  background:var(--red);color:#fff;
  box-shadow:inset 0 0 0 1px rgba(242,233,0,.45),0 8px 20px rgba(200,16,46,.42);
}

.header-actions{display:flex;align-items:center;gap:.4rem;margin-left:.25rem}
.header-action{
  font:inherit;font-size:.82rem;font-weight:700;line-height:1;
  padding:.45rem .75rem;border-radius:var(--pill);cursor:pointer;
  color:rgba(246,241,231,.82);background:transparent;
  border:1px solid rgba(220,227,232,.24);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.header-action:hover{border-color:var(--volt);color:var(--volt)}

.nav-toggle{
  display:none;align-items:center;gap:.45rem;
  font:inherit;font-size:.8rem;font-weight:800;line-height:1;cursor:pointer;
  padding:.5rem .8rem;border-radius:var(--pill);
  color:var(--ivory);background:rgba(246,241,231,.08);
  border:1px solid rgba(220,227,232,.26);
}
.nav-toggle__bars{position:relative;display:block;width:16px;height:10px}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;border-radius:2px;
  background:currentColor;transition:transform .2s var(--ease),top .2s var(--ease),bottom .2s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:4px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{bottom:4px;transform:rotate(-45deg)}

.bookmark-tip{
  position:absolute;top:calc(100% + .6rem);right:.75rem;z-index:5;
  max-width:290px;margin:0;padding:.6rem .85rem;
  background:var(--night);color:var(--ivory);
  border:1px solid var(--line-dark);border-left:3px solid var(--volt);
  border-radius:var(--radius-m);box-shadow:var(--shadow-2);
  font-size:.78rem;line-height:1.55;
}
.bookmark-tip[hidden]{display:none}

/* 10. 页脚：夜赛面板 ----------------------------------------- */
.site-footer{
  position:relative;overflow:hidden;margin-top:clamp(3rem,6vw,5rem);
  background:var(--night);color:var(--ivory);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:6px;
  background:linear-gradient(90deg,var(--red) 0 34%,var(--volt) 34% 42%,var(--red-deep) 42% 100%);
}
.site-footer::after{
  content:"";position:absolute;top:-45%;right:-8%;width:52%;height:190%;
  background:linear-gradient(140deg,rgba(200,16,46,.26),transparent 62%);
  transform:skewX(-16deg);pointer-events:none;
}
.footer-top{
  position:relative;z-index:1;
  display:grid;gap:clamp(1.5rem,3vw,2.5rem);
  grid-template-columns:1.15fr 2fr 1.05fr;
  padding-block:clamp(2.5rem,5vw,4rem) clamp(1.5rem,3vw,2.5rem);
}
.footer-brand{display:grid;gap:.7rem;align-content:start}
.footer-brand__name{
  margin:0;font-size:1.5rem;font-weight:900;letter-spacing:.02em;line-height:1.2;
}
.footer-brand__name::after{
  content:"";display:block;width:44px;height:4px;margin-top:.55rem;
  background:var(--red);transform:skewX(var(--skew));
}
.footer-brand__summary{margin:0;font-size:.92rem;line-height:1.7;color:rgba(246,241,231,.74);max-width:34ch}
.footer-brand__note{
  margin:0;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;
  color:var(--volt);
}
.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(1rem,2.4vw,2rem)}
.footer-col__title{
  margin:0 0 .85rem;font-family:var(--font-mono);font-size:.74rem;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;color:rgba(246,241,231,.55);
}
.footer-list{display:grid;gap:.55rem;list-style:none;margin:0;padding:0}
.footer-link{
  font-size:.92rem;line-height:1.5;text-decoration:none;color:rgba(246,241,231,.85);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover{color:#fff;border-bottom-color:var(--red)}
.footer-link[aria-current="page"]{color:var(--volt);font-weight:700}
.footer-contact{display:grid;gap:.85rem;align-content:start;font-size:.9rem}
.footer-contact__item{display:grid;gap:.15rem;color:rgba(246,241,231,.82);line-height:1.6}
.footer-contact__label{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;
  text-transform:uppercase;color:rgba(246,241,231,.5);
}
.footer-contact__row{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}
.footer-contact__note{
  margin:0;padding-top:.6rem;border-top:1px solid var(--line-dark);
  font-size:.78rem;line-height:1.65;color:rgba(246,241,231,.6);
}
.copy-btn{
  font:inherit;font-family:var(--font-mono);font-size:.7rem;font-weight:700;letter-spacing:.06em;
  padding:.28rem .55rem;border-radius:var(--pill);cursor:pointer;
  color:var(--ivory);background:transparent;border:1px solid rgba(220,227,232,.3);
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.copy-btn:hover{border-color:var(--volt);color:var(--volt)}
.copy-btn[data-copied="true"]{background:var(--volt);color:var(--ink);border-color:var(--volt)}

.footer-legal{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1.25rem;
  padding-block:1.15rem;
  border-top:1px solid var(--line-dark);
  font-size:.78rem;color:rgba(246,241,231,.6);
}
.footer-legal__copy,.footer-legal__icp{margin:0}
.footer-legal__icp{font-family:var(--font-mono);letter-spacing:.02em}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:1rem;list-style:none;margin:0;padding:0}
.footer-legal__links a{color:inherit;text-decoration:none}
.footer-legal__links a:hover{color:var(--volt)}

/* 11. 返回顶部 · 滚动显现 ------------------------------------ */
.to-top{
  position:fixed;right:clamp(.8rem,3vw,1.5rem);bottom:clamp(.8rem,3vw,1.5rem);z-index:70;
  width:46px;height:46px;border-radius:50%;cursor:pointer;
  display:grid;place-items:center;
  background:var(--night);color:var(--ivory);
  border:1px solid rgba(220,227,232,.3);box-shadow:var(--shadow-2);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--volt);color:var(--volt)}

[data-reveal]{transition:opacity .55s var(--ease),transform .55s var(--ease)}
[data-reveal].js-hidden{opacity:0;transform:translateY(18px)}

/* 12. 响应式 ------------------------------------------------- */
@media (min-width:1280px){
  .brand__tagline{display:block}
}
@media (max-width:1024px){
  .site-nav{
    position:absolute;top:calc(100% + .6rem);left:0;right:0;z-index:6;
    display:grid;margin:0;padding:.7rem;gap:.4rem;
    background:var(--night);border:1px solid var(--line-dark);
    border-radius:var(--radius-l);box-shadow:var(--shadow-2);
    visibility:hidden;opacity:0;transform:translateY(-10px);pointer-events:none;
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
  }
  .site-nav[data-open="true"]{visibility:visible;opacity:1;transform:none;pointer-events:auto}
  .nav-list{flex-direction:column;align-items:stretch;gap:.25rem}
  .nav-link{
    padding:.72rem .9rem;border-radius:var(--radius-m);
    font-size:.95rem;background:rgba(246,241,231,.05);
  }
  .nav-toggle{display:inline-flex}
  .footer-top{grid-template-columns:1fr}
}
@media (max-width:900px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  :root{--header-h:3.7rem}
  body{font-size:16px;padding-top:calc(var(--header-h) + 1.15rem)}
  .tab-list{display:flex;width:100%}
  .tab{flex:1 1 auto;text-align:center}
}
@media (max-width:640px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .header-action{display:none}
  .header-actions .btn--sm{display:none}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-legal{gap:.4rem .9rem}
}
@media (max-width:420px){
  .footer-grid{grid-template-columns:1fr}
  .media-grid{grid-template-columns:1fr}
}

/* 13. 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].js-hidden{opacity:1;transform:none}
}