/* ==========================================================================
   亚盈体育 · 共享样式表 /assets/site.css
   控制室墨青底 · 浮岛胶囊导航 · 等宽数字 · 斜切色块 · 纸张叠层
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#071A1C;
  --ink-2:#0B3B3C;
  --blue:#1F6BFF;
  --blue-soft:#6F9DFF;
  --amber:#F2A93B;
  --cool:#A7B4B8;
  --stone:#6E7B7A;
  --stone-2:#93A19F;
  --moss:#5E7D5A;
  --moss-light:#8FB28A;
  --clay:#B96B4B;
  --paper:#F4EFE6;
  --white:#FFFFFF;

  --surface:rgba(11,59,60,.62);
  --surface-solid:rgba(11,59,60,.82);
  --surface-deep:rgba(7,26,28,.94);
  --line:rgba(167,180,184,.20);
  --line-2:rgba(167,180,184,.38);
  --shadow:0 20px 60px rgba(0,0,0,.38);
  --shadow-soft:0 10px 30px rgba(0,0,0,.28);

  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Microsoft YaHei",sans-serif;
  --font-display:"PingFang SC","Hiragino Sans GB","Helvetica Neue","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","Roboto Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;

  --wrap:1320px;
  --pad:clamp(16px,4vw,40px);
  --radius:18px;
  --ease:cubic-bezier(.22,.7,.3,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100%;
  background:
    radial-gradient(1100px 620px at 88% -12%,rgba(31,107,255,.10),rgba(31,107,255,0) 62%),
    radial-gradient(900px 520px at -6% 6%,rgba(94,125,90,.10),rgba(94,125,90,0) 66%),
    var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img,svg,video{max-width:100%;height:auto;display:block}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0}
figure{margin:0}
[id]{scroll-margin-top:120px}
#main-content{display:block}

/* ---------- 3. 基础排版 ---------- */
h1,h2,h3,h4{margin:0;font-family:var(--font-display);color:var(--paper)}
h1,.h1{font-size:clamp(40px,7.2vw,104px);font-weight:200;line-height:.98;letter-spacing:-.02em}
h2,.h2{font-size:clamp(26px,3.4vw,46px);font-weight:300;line-height:1.12;letter-spacing:-.01em}
h3,.h3{font-size:clamp(19px,2vw,25px);font-weight:500;line-height:1.35;letter-spacing:.005em}
h4,.h4{font-size:17px;font-weight:600;line-height:1.5;letter-spacing:.01em}
p{margin:0 0 1.05em}
p:last-child{margin-bottom:0}
strong{font-weight:600;color:var(--white)}
a{color:var(--blue-soft);text-decoration:none}
a:hover{color:var(--amber)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--amber);
  margin:0 0 14px;
}
.index-num{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--stone-2);
  display:block;
  margin-bottom:10px;
}
.lead{font-size:clamp(17px,1.6vw,20px);line-height:1.75;color:rgba(244,239,230,.88)}
.dim{color:var(--cool)}
.hairline{height:1px;border:0;margin:0;background:var(--line)}

/* ---------- 4. 布局工具 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}
.section{position:relative;padding:clamp(44px,7vw,104px) 0}
.section--tight{padding:clamp(28px,4vw,56px) 0}
.section--edge{border-top:1px solid var(--line)}
.section__head{max-width:46em;margin-bottom:clamp(22px,3vw,42px)}
.measure{max-width:34em}
.measure--wide{max-width:46em}
.measure--narrow{max-width:26em}
.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--split{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr)}
.stack>*+*{margin-top:clamp(14px,2vw,24px)}
.cluster{display:flex;flex-wrap:wrap;gap:10px;align-items:center}

/* ---------- 5. 焦点与可访问性 ---------- */
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:6px}
.skip-link{
  position:absolute;
  left:50%;
  top:0;
  z-index:200;
  transform:translate(-50%,-140%);
  padding:11px 20px;
  border-radius:0 0 14px 14px;
  background:var(--amber);
  color:var(--ink);
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  text-decoration:none;
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translate(-50%,0);color:var(--ink)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:999px;
  font-size:13.5px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn--primary{background:var(--blue);color:var(--white);box-shadow:0 8px 24px rgba(31,107,255,.28)}
.btn--primary:hover{background:#3D81FF;color:var(--white);transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--line-2)}
.btn--ghost:hover{border-color:var(--amber);color:var(--amber)}
.btn--amber{background:var(--amber);color:var(--ink)}
.btn--amber:hover{background:#FFBB55;color:var(--ink)}
.btn--sm{padding:9px 16px;font-size:12.5px}

/* ---------- 7. 头部：浮岛胶囊导航 ---------- */
.masthead{
  position:sticky;
  top:0;
  z-index:80;
  padding:clamp(10px,1.6vw,18px) 0;
  transition:padding .22s var(--ease);
}
.masthead::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,26,28,.94) 0%,rgba(7,26,28,.72) 62%,rgba(7,26,28,0) 100%);
  pointer-events:none;
}
.masthead[data-scrolled="true"]{padding:7px 0}
.masthead__inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  z-index:1;
}

/* 品牌浮岛 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  padding:8px 18px 8px 9px;
  border:1px solid var(--line);
  border-radius:999px;
  background:var(--surface-solid);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-soft);
  color:var(--paper);
  text-decoration:none;
  transition:border-color .18s var(--ease),transform .18s var(--ease),padding .22s var(--ease);
}
.brand:hover{border-color:rgba(31,107,255,.66);transform:translateY(-1px);color:var(--paper)}
.brand__mark{
  position:relative;
  display:grid;
  place-items:center;
  width:32px;
  height:32px;
  border-radius:50%;
  background:radial-gradient(circle at 32% 28%,#1F6BFF 0%,#0B3B3C 68%);
  box-shadow:inset 0 0 0 1px rgba(31,107,255,.55);
  transition:width .22s var(--ease),height .22s var(--ease);
}
.brand__pulse{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--amber);
  animation:brandPulse 2.6s var(--ease) infinite;
}
@keyframes brandPulse{
  0%{box-shadow:0 0 0 0 rgba(242,169,59,.5)}
  70%{box-shadow:0 0 0 9px rgba(242,169,59,0)}
  100%{box-shadow:0 0 0 0 rgba(242,169,59,0)}
}
.brand__text{display:block;line-height:1.15}
.brand__name{display:block;font-size:15px;font-weight:600;letter-spacing:.08em}
.brand__sub{
  display:block;
  max-height:14px;
  overflow:hidden;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cool);
  opacity:1;
  transition:max-height .22s var(--ease),opacity .22s var(--ease);
}
.masthead[data-scrolled="true"] .brand{padding:6px 15px 6px 7px}
.masthead[data-scrolled="true"] .brand__mark{width:26px;height:26px}
.masthead[data-scrolled="true"] .brand__sub{max-height:0;opacity:0}

/* 栏目胶囊组 */
.nav-shell{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  padding:6px;
  list-style:none;
  border:1px solid var(--line);
  border-radius:999px;
  background:var(--surface-solid);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-soft);
  transition:padding .22s var(--ease);
}
.masthead[data-scrolled="true"] .nav-list{padding:4px}
.nav-item{display:block}
.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 15px;
  border-radius:999px;
  font-size:13.5px;
  font-weight:500;
  letter-spacing:.07em;
  color:var(--cool);
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease),box-shadow .18s var(--ease),padding .22s var(--ease);
}
.masthead[data-scrolled="true"] .nav-link{padding:7px 14px}
.nav-link:hover{color:var(--paper);background:rgba(31,107,255,.16)}
.nav-link[aria-current="page"]{
  color:var(--white);
  background:rgba(31,107,255,.24);
  box-shadow:inset 0 0 0 1px rgba(31,107,255,.55);
}
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:3px;
  width:4px;
  height:4px;
  margin-left:-2px;
  border-radius:50%;
  background:var(--amber);
}
.nav-cta{white-space:nowrap}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:11px 18px;
  border:1px solid var(--line-2);
  border-radius:999px;
  background:var(--surface-deep);
  color:var(--paper);
  font-size:12.5px;
  letter-spacing:.18em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--amber);color:var(--amber)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars i{display:block;height:1.5px;background:currentColor;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child{transform:translateY(5.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child{transform:translateY(-5.5px) rotate(-45deg)}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,120px);
  padding:clamp(40px,6vw,76px) 0 clamp(22px,3vw,32px);
  background:linear-gradient(180deg,#071A1C 0%,#06181A 58%,#041314 100%);
  border-top:1px solid var(--line);
  color:var(--cool);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:3px;
  background:linear-gradient(90deg,var(--blue) 0%,var(--ink-2) 32%,var(--moss) 52%,var(--amber) 74%,var(--clay) 100%);
  opacity:.92;
}
.site-footer::after{
  content:"";
  position:absolute;
  right:-6%;
  top:-40px;
  width:min(520px,62vw);
  height:230px;
  background:linear-gradient(115deg,rgba(31,107,255,.18),rgba(31,107,255,0));
  clip-path:polygon(0 0,100% 22%,88% 100%,0 74%);
  pointer-events:none;
}
.foot-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.6fr 1fr .9fr 1.5fr;
  gap:clamp(22px,3vw,44px);
}
.foot-brand__name{margin:0;font-family:var(--font-display);font-size:clamp(22px,2.4vw,30px);font-weight:300;letter-spacing:.03em;color:var(--paper)}
.foot-brand__line{
  margin:8px 0 14px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--amber);
}
.foot-brand__desc{margin:0;font-size:14.5px;line-height:1.85;color:rgba(167,180,184,.92);max-width:30em}
.foot-col__title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--moss-light);
}
.foot-list{list-style:none;display:grid;gap:2px}
.foot-list a{
  position:relative;
  display:inline-block;
  padding:5px 0;
  font-size:14.5px;
  color:var(--cool);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.foot-list a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:3px;
  width:100%;
  height:1px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s var(--ease);
}
.foot-list a:hover{color:var(--paper)}
.foot-list a:hover::after{transform:scaleX(1)}
.foot-contact{list-style:none;display:grid;gap:11px}
.foot-contact__row{display:grid;grid-template-columns:72px minmax(0,1fr);gap:10px;align-items:baseline}
.foot-contact__k{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--stone-2)}
.foot-contact__v{font-family:var(--font-mono);font-size:12.5px;line-height:1.6;color:var(--paper);word-break:break-word}
.foot-note{margin:14px 0 0;font-size:12.5px;line-height:1.7;color:rgba(167,180,184,.86);max-width:34em}
.foot-base{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:center;
  gap:10px 24px;
  margin-top:clamp(28px,4vw,52px);
  padding-top:clamp(16px,2vw,24px);
  border-top:1px solid var(--line);
}
.foot-base__meta{margin:0;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--stone-2)}

/* ---------- 9. 通用内容组件 ---------- */
.panel{
  position:relative;
  padding:clamp(20px,3vw,32px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface);
}
.panel--paper{background:var(--paper);color:var(--ink);border-color:rgba(7,26,28,.14)}
.panel--paper h2,.panel--paper h3,.panel--paper h4{color:var(--ink)}
.panel--paper .stat__num{color:var(--ink)}
.panel--paper .prose{color:rgba(7,26,28,.86)}
.panel--flat{background:transparent}
.stack-paper{position:relative;isolation:isolate}
.stack-paper::before,
.stack-paper::after{
  content:"";
  position:absolute;
  border-radius:var(--radius);
  pointer-events:none;
}
.stack-paper::before{inset:12px -9px -12px 9px;background:rgba(244,239,230,.055);border:1px solid rgba(167,180,184,.24);z-index:-1}
.stack-paper::after{inset:22px -18px -22px 18px;background:rgba(244,239,230,.03);border:1px solid rgba(167,180,184,.14);z-index:-2}
.dot-grid{background-image:radial-gradient(rgba(167,180,184,.17) 1px,transparent 1px);background-size:22px 22px}

.slash{
  position:absolute;
  width:clamp(120px,22vw,300px);
  height:clamp(60px,10vw,150px);
  background:linear-gradient(115deg,rgba(31,107,255,.85),rgba(31,107,255,.10));
  clip-path:polygon(0 22%,100% 0,100% 78%,0 100%);
  pointer-events:none;
}
.slash--amber{background:linear-gradient(115deg,rgba(242,169,59,.88),rgba(242,169,59,.12))}
.slash--clay{background:linear-gradient(115deg,rgba(185,107,75,.85),rgba(185,107,75,.10))}
.slash--moss{background:linear-gradient(115deg,rgba(94,125,90,.85),rgba(94,125,90,.10))}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border:1px solid var(--line-2);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cool);
  white-space:nowrap;
}
.tag--blue{border-color:rgba(31,107,255,.55);color:var(--blue-soft);background:rgba(31,107,255,.10)}
.tag--amber{border-color:rgba(242,169,59,.55);color:var(--amber);background:rgba(242,169,59,.10)}
.tag--moss{border-color:rgba(94,125,90,.60);color:var(--moss-light);background:rgba(94,125,90,.14)}
.tag--clay{border-color:rgba(185,107,75,.60);color:#D68A69;background:rgba(185,107,75,.12)}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(26px,3.6vw,44px);
  font-weight:600;
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--paper);
}
.stat__label{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--stone-2)}

.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 16px;
  border:1px solid var(--line-2);
  border-radius:999px;
  background:rgba(11,59,60,.5);
  color:var(--cool);
  font-size:13px;
  letter-spacing:.06em;
  cursor:pointer;
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.chip:hover{color:var(--paper);border-color:rgba(31,107,255,.6)}
.chip[aria-pressed="true"]{background:var(--blue);border-color:var(--blue);color:var(--white)}

.tabs{display:flex;flex-wrap:wrap;gap:4px;border-bottom:1px solid var(--line)}
.tab{
  position:relative;
  padding:12px 16px;
  border:0;
  background:transparent;
  color:var(--cool);
  font-size:13.5px;
  letter-spacing:.08em;
  cursor:pointer;
  transition:color .18s var(--ease);
}
.tab:hover{color:var(--paper)}
.tab[aria-selected="true"]{color:var(--paper)}
.tab[aria-selected="true"]::after{content:"";position:absolute;left:12px;right:12px;bottom:-1px;height:2px;background:var(--amber)}

.crumb{margin:clamp(16px,3vw,30px) 0}
.crumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none}
.crumb__item{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--stone-2)}
.crumb__item+.crumb__item::before{content:"/";color:rgba(167,180,184,.45)}
.crumb a{color:var(--cool)}
.crumb a:hover{color:var(--amber)}
.crumb__current{color:var(--paper)}

.prose{max-width:34em;font-size:16.5px;line-height:1.8;color:rgba(244,239,230,.86)}
.prose h2{font-size:clamp(22px,2.6vw,32px);margin:1.9em 0 .6em}
.prose h3{margin:1.7em 0 .5em}
.prose ul,.prose ol{padding-left:1.15em;margin:0 0 1.05em}
.prose li{margin-bottom:.45em}
.prose a{color:var(--blue-soft);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--amber)}

.table-wrap{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}
.table{width:100%;min-width:520px;border-collapse:collapse;font-size:14.5px}
.table th,.table td{padding:14px 12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.table th{font-family:var(--font-mono);font-size:10.5px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;color:var(--stone-2)}
.table td.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--paper)}
.table tbody tr{transition:background-color .18s var(--ease)}
.table tbody tr:hover{background:rgba(31,107,255,.07)}

.timeline{position:relative;list-style:none;padding-left:28px;border-left:1px solid var(--line-2)}
.timeline__item{position:relative;padding-bottom:clamp(20px,3vw,34px)}
.timeline__item:last-child{padding-bottom:0}
.timeline__item::before{
  content:"";
  position:absolute;
  left:-33px;
  top:8px;
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--ink);
  border:2px solid var(--amber);
}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(150deg,#0B3B3C 0%,#071A1C 58%,#0E2A2E 100%);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(115deg,rgba(167,180,184,.06) 0 2px,rgba(167,180,184,0) 2px 9px);
  pointer-events:none;
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--banner{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--slant{border-radius:0;clip-path:polygon(0 0,100% 5%,100% 100%,0 95%)}
.img-cap{margin-top:10px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--stone-2)}

/* ---------- 10. 滚动进度与返回顶部（JS 注入） ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:2px;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--blue),var(--amber));
  z-index:120;
  pointer-events:none;
}
.to-top{
  position:fixed;
  right:clamp(14px,3vw,28px);
  bottom:clamp(14px,3vw,28px);
  z-index:110;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  padding:0;
  border:1px solid var(--line-2);
  border-radius:50%;
  background:var(--surface-deep);
  color:var(--paper);
  font-size:16px;
  line-height:1;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--amber);color:var(--amber)}

/* ---------- 11. 显现动效 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
  transition-delay:var(--reveal-delay,0ms);
}
[data-reveal="in"]{opacity:1;transform:none}

/* ---------- 12. 响应式 ---------- */
@media (max-width:1080px){
  .nav-toggle{display:inline-flex}
  .nav-shell{
    position:absolute;
    top:calc(100% + 12px);
    right:clamp(10px,3vw,18px);
    width:min(420px,calc(100% - clamp(20px,6vw,36px)));
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-left:0;
    padding:12px;
    border:1px solid rgba(167,180,184,.28);
    border-radius:22px;
    background:rgba(6,22,24,.97);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    box-shadow:var(--shadow);
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
    max-height:calc(100vh - 140px);
    overflow-y:auto;
  }
  .nav-shell[data-open="true"]{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:0 0 10px 0;
    margin-bottom:10px;
    border:0;
    border-bottom:1px solid var(--line);
    border-radius:0;
    background:transparent;
    box-shadow:none;
    -webkit-backdrop-filter:none;
    backdrop-filter:none;
  }
  .masthead[data-scrolled="true"] .nav-list{padding:0 0 10px 0}
  .nav-link{display:block;padding:13px 14px;border-radius:14px;font-size:15px;letter-spacing:.05em}
  .masthead[data-scrolled="true"] .nav-link{padding:13px 14px}
  .nav-link[aria-current="page"]{box-shadow:inset 0 0 0 1px rgba(31,107,255,.55)}
  .nav-link[aria-current="page"]::after{left:auto;right:16px;bottom:50%;margin:0 0 -2px 0}
  .nav-cta{align-self:stretch;width:100%;padding:14px 20px;border-radius:14px}
  .masthead{background:linear-gradient(180deg,rgba(7,26,28,.96),rgba(7,26,28,.86))}
}

@media (max-width:1024px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--split{grid-template-columns:minmax(0,1fr)}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-brand{grid-column:1/-1}
}
@media (max-width:860px){
  .grid--2{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:620px){
  :root{--radius:14px}
  .grid--3,.grid--4,.grid--2{grid-template-columns:minmax(0,1fr)}
  .foot-grid{grid-template-columns:minmax(0,1fr)}
  .foot-base{flex-direction:column;align-items:flex-start}
  .nav-shell{
    right:clamp(8px,2.4vw,14px);
    left:clamp(8px,2.4vw,14px);
    width:auto;
    max-height:calc(100vh - 120px);
  }
  .brand{padding:7px 14px 7px 8px}
  .brand__sub{display:none}
  .nav-toggle{padding:10px 14px;letter-spacing:.12em}
  .skip-link{left:16px;transform:translate(0,-140%)}
  .skip-link:focus{transform:translate(0,0)}
}

/* ---------- 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;
    transition-delay:0ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .brand__pulse{animation:none;box-shadow:0 0 0 4px rgba(242,169,59,.2)}
}