/* ============================================================
   万赢体育主站 · 共享样式 /assets/site.css
   夜场绿茵 + 丹霞赭红 + 沙金 · 杂志式刊头 · 数据仪表盘
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink-900:#0B2419;   /* 夜场深绿 */
  --ink-800:#143A28;   /* 草皮层绿 */
  --dash:#0E1B2A;      /* 深墨蓝 */
  --neon:#4CE07A;      /* 荧光草绿 · 唯一亮强调 */
  --danza:#B4462C;     /* 丹霞赭红 */
  --sand:#D8A24E;      /* 沙金 */
  --chalk:#F2F6F3;     /* 冷白 */
  --moss:#7E9C8B;      /* 草灰绿 */
  --mist:#DDE8E0;      /* 雾绿底 */
  --white:#FFFFFF;

  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Roboto Mono","Courier New",monospace;

  --r-s:12px;
  --r-m:18px;
  --r-l:28px;
  --wrap:1180px;
  --gutter:clamp(16px,4vw,32px);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:220ms;
  --hair:rgba(126,156,139,.24);
  --hair-soft:rgba(126,156,139,.14);
}

/* ---------- 2. Reset 与基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--ink-900);
  color:var(--chalk);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img,svg,video,canvas{display:block;max-width:100%}
h1,h2,h3,h4,h5,h6{margin:0 0 .5em;line-height:1.18;font-weight:800;letter-spacing:-.01em}
h1{font-size:clamp(28px,5vw,44px)}
h2{font-size:clamp(22px,3.2vw,32px)}
h3{font-size:clamp(18px,2.2vw,22px)}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
::selection{background:var(--neon);color:var(--ink-900)}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:4px}
.section--mist :focus-visible,.card--mist :focus-visible{outline-color:var(--danza)}

/* ---------- 3. 中文排版与三级层级 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(40px,7vw,112px);
  line-height:1.02;
  letter-spacing:-.02em;
  margin:0;
  color:var(--white);
}
.display--sm{font-size:clamp(28px,5vw,64px)}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(24px,3.4vw,32px);
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.2;
  margin:0 0 .6em;
}
.kicker{
  display:inline-block;
  font-size:11px;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--sand);
  border-left:2px solid var(--danza);
  padding:2px 0 2px 9px;
  margin-bottom:14px;
}
.num,.stat__num,.timeline__round,.media__badge{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
}
.num{color:var(--neon)}
.note{
  font-size:12px;
  line-height:1.65;
  font-weight:300;
  letter-spacing:.04em;
  color:var(--moss);
}
.note--block{
  display:inline-block;
  background:rgba(14,27,42,.9);
  color:var(--chalk);
  padding:5px 10px;
  border-radius:8px;
}
.prose p{max-width:64ch}
.prose p:last-child{margin-bottom: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;
}

/* ---------- 4. 布局容器与网格 ---------- */
.wrap{width:min(var(--wrap),100% - var(--gutter)*2);margin-inline:auto}
.wrap--narrow{width:min(760px,100% - var(--gutter)*2);margin-inline:auto}
.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(28px,4vw,52px)}
.section--mist{background:var(--mist);color:#12271C}
.section--mist .section-title{color:var(--ink-900)}
.section--mist .note{color:#3F5B4A}
.section--mist .kicker{color:#8A4A2E;border-left-color:var(--danza)}
.hairline{height:1px;background:var(--hair);border:0;margin:0}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.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))}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}

/* ---------- 5. 背景质感 ---------- */
.pitch-bg{
  background-color:var(--ink-900);
  background-image:
    repeating-linear-gradient(102deg,rgba(76,224,122,.045) 0 46px,rgba(76,224,122,0) 46px 92px),
    radial-gradient(circle at 16% 10%,rgba(76,224,122,.10),transparent 44%),
    radial-gradient(circle at 84% 82%,rgba(180,70,44,.12),transparent 48%);
}
.pitch-bg--mist{
  background-color:var(--mist);
  background-image:
    repeating-linear-gradient(102deg,rgba(11,36,25,.035) 0 46px,rgba(11,36,25,0) 46px 92px),
    radial-gradient(circle at 88% 6%,rgba(216,162,78,.16),transparent 46%);
  color:#12271C;
}

/* ---------- 6. 按钮与标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.55em;
  padding:.72em 1.4em;
  border-radius:999px;
  border:1px solid transparent;
  font-size:14px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.4;
  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(-2px)}
.btn--primary{background:var(--neon);color:var(--ink-900)}
.btn--primary:hover{background:#6BED91}
.btn--ghost{border-color:rgba(76,224,122,.55);color:var(--neon)}
.btn--ghost:hover{background:rgba(76,224,122,.12)}
.btn--danza{background:var(--danza);color:var(--white)}
.btn--danza:hover{background:#C9553A}
.btn--sand{background:var(--sand);color:var(--ink-900)}
.btn--light{background:var(--chalk);color:var(--ink-900)}
.chip{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:.4em .9em;
  border-radius:999px;
  border:1px solid rgba(242,246,243,.18);
  background:rgba(242,246,243,.04);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--chalk);
  white-space:nowrap;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.chip:hover{border-color:rgba(242,246,243,.42);background:rgba(242,246,243,.08)}
.chip--neon{border-color:rgba(76,224,122,.55);color:var(--neon);background:rgba(76,224,122,.08)}
.chip--neon:hover{background:rgba(76,224,122,.16)}
.stamp{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  background:var(--danza);
  color:var(--white);
  font-size:12px;
  font-weight:600;
  letter-spacing:.2em;
  padding:.42em .95em;
  border-radius:6px;
  transform:rotate(-1.5deg);
}

/* ---------- 7. 面包屑 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.55em;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--moss);
  margin-bottom:clamp(18px,3vw,32px);
}
.crumbs li{display:flex;align-items:center;gap:.55em}
.crumbs li+li::before{content:"/";color:rgba(126,156,139,.6)}
.crumbs a{color:rgba(242,246,243,.7)}
.crumbs a:hover{color:var(--neon)}
.crumbs [aria-current="page"]{color:var(--chalk)}
.section--mist .crumbs{color:#3F5B4A}
.section--mist .crumbs a{color:#3F5B4A}
.section--mist .crumbs [aria-current="page"]{color:var(--ink-900)}

/* ---------- 8. 卡片与数据 ---------- */
.card{
  background:var(--ink-800);
  border:1px solid var(--hair-soft);
  border-radius:var(--r-l);
  padding:clamp(18px,3vw,28px);
}
.card--dark{background:var(--dash)}
.card--mist{background:var(--mist);color:#12271C}
.card--mist .note{color:#3F5B4A}
.card--neon-edge{box-shadow:inset 0 0 0 1px rgba(76,224,122,.45)}
.stat{display:flex;flex-direction:column;gap:4px}
.stat__num{
  font-size:clamp(24px,4vw,40px);
  line-height:1.05;
  letter-spacing:-.01em;
  color:var(--neon);
}
.card--mist .stat__num,.section--mist .stat__num{color:#1E5B39}
.stat__label{font-size:12px;letter-spacing:.16em;color:var(--moss)}
.card--mist .stat__label,.section--mist .stat__label{color:#4C6B58}
.stat-row{display:flex;flex-wrap:wrap;gap:clamp(18px,3vw,36px)}

/* ---------- 9. 图片容器（页面阶段放图） ---------- */
.media{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  border-radius:var(--r-l);
  aspect-ratio:16/9;
  background:linear-gradient(150deg,var(--ink-800),var(--dash));
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media--ph{border:1px dashed rgba(126,156,139,.5)}
.media__img{width:100%;height:100%;object-fit:cover}
.media__grid{
  position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(242,246,243,.10) 1px,transparent 1px),
    linear-gradient(90deg,rgba(242,246,243,.10) 1px,transparent 1px);
  background-size:52px 52px;
  opacity:.5;
}
.media__scrim{
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(11,36,25,0) 42%,rgba(11,36,25,.86));
}
.media__badge{
  position:absolute;left:14px;top:14px;
  font-size:12px;letter-spacing:.08em;
  padding:4px 9px;border-radius:6px;
  background:rgba(11,36,25,.82);
  color:var(--neon);
  border:1px solid rgba(76,224,122,.35);
}
.media__caption{
  position:absolute;left:16px;right:16px;bottom:12px;
  margin:0;font-size:12px;letter-spacing:.06em;
  color:rgba(242,246,243,.88);
}
@media (max-width:640px){
  .media--wide{aspect-ratio:16/9}
  .media{border-radius:var(--r-m)}
}

/* ---------- 10. 分段标签页 ---------- */
.tabs__list{
  display:flex;flex-wrap:wrap;gap:6px;
  padding:6px;border-radius:999px;
  background:rgba(14,27,42,.72);
  border:1px solid var(--hair-soft);
  width:fit-content;max-width:100%;
}
.tab{
  padding:.5em 1.15em;
  border-radius:999px;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--moss);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.tab:hover{color:var(--chalk)}
.tab[aria-selected="true"]{background:var(--neon);color:var(--ink-900);font-weight:600}
.tabs__panel[hidden]{display:none}
.tabs__panel{padding-top:clamp(18px,3vw,28px)}
.tabs__panel:not([hidden]){animation:panel-in var(--dur) var(--ease) both}
@keyframes panel-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---------- 11. 手风琴 ---------- */
.accordion{border-top:1px solid var(--hair)}
.accordion__item{border-bottom:1px solid var(--hair)}
.accordion__trigger{
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  width:100%;padding:1.05em 0;text-align:left;
  font-size:16px;font-weight:600;line-height:1.55;color:var(--chalk);
}
.accordion__trigger::after{
  content:"+";flex:0 0 auto;
  font-family:var(--font-num);font-size:18px;line-height:1.4;
  color:var(--neon);
}
.accordion__trigger[aria-expanded="true"]::after{content:"–"}
.accordion__panel{padding:0 0 1.1em;color:rgba(242,246,243,.68);font-size:15px}
.accordion__panel[hidden]{display:none}
.section--mist .accordion{border-top-color:rgba(11,36,25,.18)}
.section--mist .accordion__item{border-bottom-color:rgba(11,36,25,.18)}
.section--mist .accordion__trigger{color:var(--ink-900)}
.section--mist .accordion__trigger::after{color:#1E5B39}
.section--mist .accordion__panel{color:#3F5B4A}

/* ---------- 12. 轮次时间轴 ---------- */
.timeline{position:relative;padding-left:30px}
.timeline::before{
  content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,rgba(76,224,122,.9),rgba(76,224,122,.06));
}
.timeline__item{position:relative;padding-block:14px}
.timeline__item::before{
  content:"";position:absolute;left:-26px;top:24px;
  width:10px;height:10px;border-radius:50%;
  background:var(--ink-800);
  box-shadow:0 0 0 2px var(--moss);
  transition:background var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.timeline__item[data-current]::before{background:var(--neon);box-shadow:0 0 0 5px rgba(76,224,122,.22)}
.timeline__round{font-size:12px;letter-spacing:.18em;color:var(--sand);display:block;margin-bottom:6px}

/* ---------- 13. 显现动效 ---------- */
html[data-motion="on"] [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
html[data-motion="on"] [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 14. 页头 · 杂志式居中刊头 ---------- */
.skip-link{
  position:absolute;left:50%;top:0;
  transform:translate(-50%,-140%);
  z-index:90;
  padding:10px 18px;
  border-radius:0 0 var(--r-s) var(--r-s);
  background:var(--neon);
  color:var(--ink-900);
  font-size:13px;font-weight:700;letter-spacing:.1em;
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translate(-50%,0)}
.site-header{
  position:sticky;top:0;z-index:60;
  background-color:rgba(11,36,25,.95);
  background-image:
    repeating-linear-gradient(102deg,rgba(76,224,122,.05) 0 44px,rgba(76,224,122,0) 44px 88px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--hair);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:linear-gradient(90deg,transparent,rgba(76,224,122,.55),transparent);
  pointer-events:none;
}
.masthead{position:relative}
.masthead__inner{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  padding-block:clamp(14px,2.2vw,22px);
  transition:padding var(--dur) var(--ease);
}
.masthead__slot{display:flex;align-items:center;gap:10px}
.masthead__slot--start{position:absolute;left:0;top:50%;transform:translateY(-50%)}
.masthead__slot--end{position:absolute;right:0;top:50%;transform:translateY(-50%)}
.brand{
  display:flex;flex-direction:column;align-items:center;
  text-align:center;gap:5px;
}
.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(24px,3.4vw,40px);
  line-height:1;
  letter-spacing:.14em;
  color:var(--white);
  transition:font-size var(--dur) var(--ease),letter-spacing var(--dur) var(--ease);
}
.brand__tagline{
  max-height:22px;
  font-size:11px;
  letter-spacing:.32em;
  color:var(--moss);
  overflow:hidden;
  transition:max-height var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.site-header.is-condensed .masthead__inner{padding-block:8px}
.site-header.is-condensed .brand__name{font-size:clamp(18px,2.2vw,24px);letter-spacing:.2em}
.site-header.is-condensed .brand__tagline{max-height:0;opacity:0}

/* 栏目行 */
.site-nav{padding-block:0}
.site-nav__list{
  display:flex;
  justify-content:center;
  gap:clamp(10px,2.4vw,32px);
  overflow-x:auto;
  scrollbar-width:none;
  border-top:1px solid var(--hair-soft);
}
.site-nav__list::-webkit-scrollbar{display:none}
.site-nav__list a{
  position:relative;
  display:inline-block;
  padding:13px 4px;
  font-size:13px;
  letter-spacing:.16em;
  white-space:nowrap;
  color:rgba(242,246,243,.62);
  transition:color var(--dur) var(--ease);
}
.site-nav__list a:hover{color:var(--chalk)}
.site-nav__list a::after{
  content:"";position:absolute;left:50%;bottom:7px;
  width:0;height:2px;border-radius:2px;
  background:var(--neon);
  transform:translateX(-50%);
  transition:width var(--dur) var(--ease);
}
.site-nav__list a[aria-current="page"]{color:var(--white);font-weight:600}
.site-nav__list a[aria-current="page"]::after{width:20px}

/* 移动栏目按钮 */
.nav-toggle{
  display:none;
  align-items:center;gap:8px;
  padding:8px 13px;
  border-radius:999px;
  border:1px solid rgba(76,224,122,.5);
  color:var(--neon);
  font-size:12px;letter-spacing:.18em;
  transition:background var(--dur) var(--ease);
}
.nav-toggle:hover{background:rgba(76,224,122,.12)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bars span{
  height:2px;border-radius:2px;background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__text{line-height:1}

/* ---------- 15. 页脚 ---------- */
.site-footer{
  margin-top:clamp(40px,6vw,80px);
  background-color:var(--ink-900);
  background-image:
    repeating-linear-gradient(100deg,rgba(76,224,122,.045) 0 52px,rgba(76,224,122,0) 52px 104px),
    radial-gradient(120% 80% at 12% 0%,rgba(216,162,78,.10),transparent 60%),
    radial-gradient(90% 70% at 88% 100%,rgba(180,70,44,.16),transparent 62%);
  border-top:1px solid var(--hair);
  color:rgba(242,246,243,.72);
  font-size:14px;
}
.footer__inner{
  display:grid;
  grid-template-columns:1.15fr 1.6fr 1.1fr;
  gap:clamp(24px,4vw,56px);
  padding-block:clamp(40px,6vw,72px);
}
.footer__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(24px,2.6vw,32px);
  letter-spacing:.14em;
  line-height:1.1;
  color:var(--white);
  margin:0 0 8px;
}
.footer__line{
  font-size:12px;letter-spacing:.22em;
  color:var(--sand);margin:0 0 14px;
}
.footer__statement{
  max-width:32ch;
  color:rgba(242,246,243,.66);
  margin:0 0 18px;
}
.footer__cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2.4vw,28px);
}
.footer__heading{
  font-size:11px;
  font-weight:600;
  letter-spacing:.3em;
  color:var(--moss);
  margin:0 0 14px;
}
.footer__col ul{display:flex;flex-direction:column;gap:10px}
.footer__col a{
  font-size:14px;
  color:rgba(242,246,243,.72);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer__col a:hover{color:var(--neon);border-bottom-color:rgba(76,224,122,.5)}
.footer__contact-list{display:flex;flex-direction:column;gap:14px}
.footer__contact-item{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.footer__label{
  font-size:11px;letter-spacing:.2em;
  color:var(--moss);min-width:38px;
}
.footer__value{
  font-family:var(--font-num);
  font-size:13px;
  color:var(--chalk);
  word-break:break-all;
}
.footer__value--text{
  font-family:var(--font-body);
  font-size:13px;
  line-height:1.6;
  color:rgba(242,246,243,.72);
  word-break:normal;
}
.copy-btn{
  padding:3px 10px;
  border-radius:999px;
  border:1px solid rgba(76,224,122,.4);
  color:var(--neon);
  font-size:11px;
  letter-spacing:.12em;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.copy-btn:hover{background:rgba(76,224,122,.12)}
.copy-btn.is-done{background:var(--neon);color:var(--ink-900);border-color:var(--neon)}
.footer__legal{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding-block:18px;
  border-top:1px solid var(--hair);
  font-size:12px;
  color:var(--moss);
}
.footer__legal p{margin:0}
.footer__note{max-width:56ch}

/* ---------- 16. JS 注入元素 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;height:2px;width:0;
  background:linear-gradient(90deg,var(--sand),var(--neon));
  z-index:80;pointer-events:none;
}
.to-top{
  position:fixed;
  right:clamp(14px,3vw,28px);
  bottom:clamp(14px,3vw,28px);
  width:44px;height:44px;
  display:none;
  align-items:center;justify-content:center;
  border-radius:50%;
  background:rgba(14,27,42,.9);
  color:var(--neon);
  border:1px solid rgba(76,224,122,.45);
  font-size:16px;line-height:1;
  z-index:70;
  backdrop-filter:blur(6px);
}
.to-top.is-visible{display:inline-flex}

/* ---------- 17. 响应式 ---------- */
@media (max-width:1100px){
  .masthead__slot--start{display:none}
}
@media (max-width:1024px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__inner{grid-template-columns:1fr 1fr;row-gap:36px}
  .footer__contact{grid-column:1 / -1}
}
@media (max-width:820px){
  .nav-toggle{display:inline-flex}
  .masthead__slot--end{top:12px;transform:none}
  .masthead__slot--end .chip{display:none}
  .masthead__inner{padding-block:12px}
  .site-header.is-condensed .masthead__inner{padding-block:8px}
  .site-nav{display:none;border-top:1px solid var(--hair-soft)}
  .site-nav[data-open]{display:block;animation:nav-in var(--dur) var(--ease) both}
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    overflow:visible;
    padding-block:4px;
  }
  .site-nav__list li{border-bottom:1px solid var(--hair-soft)}
  .site-nav__list li:last-child{border-bottom:0}
  .site-nav__list a{padding:14px 2px;font-size:15px;letter-spacing:.08em;display:block}
  .site-nav__list a::after{left:2px;transform:none;bottom:10px}
  .site-nav__list a[aria-current="page"]::after{width:16px}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .timeline{padding-left:24px}
  .timeline__item::before{left:-21px}
}
@keyframes nav-in{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
@media (max-width:640px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .footer__inner{grid-template-columns:1fr;padding-block:36px}
  .footer__cols{grid-template-columns:1fr 1fr}
  .brand__name{letter-spacing:.1em}
  .brand__tagline{letter-spacing:.2em}
  .display{letter-spacing:-.01em}
  .tabs__list{width:100%;justify-content:space-between}
  .tab{flex:1 1 auto;text-align:center;padding:.5em .6em}
}
@media (max-width:400px){
  .footer__cols{grid-template-columns:1fr}
}

/* ---------- 18. 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;
  }
  html[data-motion="on"] [data-reveal]{opacity:1 !important;transform:none !important}
  .btn:hover{transform:none}
}