/* ============================================================
   浩瀚体育 · 共享站点样式 /assets/site.css
   草原夜空深蓝 + 荧光赛程青绿 + 暖橙战报点 + 奶油档案纸
   ============================================================ */

*,*::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,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{max-width:100%;display:block}
a{color:inherit}
button{font:inherit;color:inherit}

:root{
  --night:#071A33;
  --night-2:#0E2A4A;
  --night-3:#123B66;
  --mint:#38F2C4;
  --mint-soft:rgba(56,242,196,.12);
  --mint-deep:#0C8F7A;
  --amber:#FF8A3D;
  --amber-soft:rgba(255,138,61,.13);
  --cream:#F4EBDD;
  --ink:#2B1F1A;
  --mist:#D8E4E8;
  --white:#FFFFFF;
  --line:rgba(216,228,232,.16);
  --line-strong:rgba(216,228,232,.30);
  --ink-line:rgba(43,31,26,.16);
  --shell:1320px;
  --gutter:clamp(16px,4vw,48px);
  --cut:20px;
  --radius-pill:999px;
  --font-sans:system-ui,"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.22,.8,.24,1);
}

body{
  min-height:100vh;
  background:
    radial-gradient(1100px 560px at 10% -12%,rgba(56,242,196,.10),transparent 62%),
    radial-gradient(880px 520px at 94% 4%,rgba(255,138,61,.09),transparent 64%),
    var(--night);
  color:var(--mist);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

main{display:block}
h1,h2,h3,h4{font-weight:800;line-height:1.18;letter-spacing:.02em;color:var(--cream)}
p{max-width:76ch}

:where(h1,h2,h3,h4,.section-title){text-wrap:balance}
:where(p,.lead){text-wrap:pretty}

:where(a,button,[tabindex],[role="tab"],summary):focus-visible{
  outline:2px solid var(--mint);
  outline-offset:3px;
  border-radius:6px;
}
#main-content:focus{outline:none}

/* ---------- 容器与工具类 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.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;
}
.surface-cream{background:var(--cream);color:var(--ink)}
.surface-cream :where(h1,h2,h3,h4){color:var(--ink)}
.surface-night{background:var(--night);color:var(--mist)}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:12px;
  left:50%;
  z-index:300;
  transform:translate(-50%,-180%);
  display:inline-block;
  padding:12px 24px;
  border-radius:var(--radius-pill);
  background:var(--mint);
  color:var(--night);
  font-size:14px;
  font-weight:800;
  letter-spacing:.06em;
  text-decoration:none;
  box-shadow:0 22px 44px -20px rgba(0,0,0,.85);
  transition:transform .2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translate(-50%,0)}

/* ---------- 头部：双胶囊浮岛 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding-top:clamp(10px,1.4vw,18px);
  background:linear-gradient(180deg,rgba(7,26,51,.97) 0%,rgba(7,26,51,.86) 70%,rgba(7,26,51,.62) 100%);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-shell{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(10px,2vw,24px);
  padding-bottom:clamp(10px,1.4vw,18px);
}

/* 品牌岛 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
  padding:8px 20px 8px 9px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(14,42,74,.74);
  color:var(--cream);
  text-decoration:none;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.brand:hover{
  border-color:rgba(56,242,196,.55);
  background:rgba(18,59,102,.85);
  box-shadow:0 16px 34px -22px rgba(56,242,196,.85);
}
.brand-mark{
  flex:none;
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  background:linear-gradient(140deg,var(--mint) 0%,var(--mint-deep) 100%);
  clip-path:polygon(0 0,100% 0,100% 62%,62% 100%,0 100%);
}
.brand-mark-dot{
  width:9px;height:9px;border-radius:50%;
  background:var(--night);
  box-shadow:0 0 0 3px rgba(7,26,51,.32),0 0 12px rgba(7,26,51,.6);
}
.brand-text{display:flex;flex-direction:column;min-width:0;line-height:1.15}
.brand-name{
  font-size:clamp(15px,1.6vw,18px);
  font-weight:800;
  letter-spacing:.12em;
  color:var(--cream);
  white-space:nowrap;
}
.brand-line{
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:rgba(216,228,232,.62);
  white-space:nowrap;
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:11px 18px;
  border:1px solid var(--line-strong);
  border-radius:var(--radius-pill);
  background:rgba(14,42,74,.86);
  color:var(--cream);
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle:hover{border-color:rgba(56,242,196,.55)}
.nav-toggle[aria-expanded="true"]{
  color:var(--mint);
  border-color:rgba(56,242,196,.6);
  background:rgba(56,242,196,.10);
}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle-bars span{
  display:block;height:2px;border-radius:2px;background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:last-child{transform:translateY(-3px) rotate(-45deg)}

/* 栏目岛 */
.primary-nav{
  display:flex;
  align-items:center;
  gap:clamp(8px,1.2vw,18px);
  padding:6px 6px 6px 18px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(14,42,74,.74);
  box-shadow:inset 0 1px 0 rgba(216,228,232,.05);
}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(2px,1vw,12px);
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 11px;
  border-radius:var(--radius-pill);
  color:var(--mist);
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.05em;
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:11px;right:11px;bottom:4px;
  height:2px;border-radius:2px;
  background:var(--mint);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--cream)}
.nav-link:hover::after,
.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{
  color:var(--mint);
  background:var(--mint-soft);
}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 18px;
  border-radius:var(--radius-pill);
  background:var(--mint);
  color:var(--night);
  font-size:14px;
  font-weight:800;
  letter-spacing:.05em;
  text-decoration:none;
  white-space:nowrap;
  transition:background .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-cta::after{
  content:"↗";
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1;
}
.nav-cta:hover{
  background:#63F9D6;
  transform:translateY(-1px);
  box-shadow:0 14px 28px -14px rgba(56,242,196,.9);
}
.nav-cta:active{transform:translateY(0)}

/* 滚动进度赛道 */
.header-track{
  position:relative;
  height:3px;
  overflow:hidden;
  background:repeating-linear-gradient(90deg,rgba(216,228,232,.16) 0 10px,transparent 10px 20px);
}
.header-track-fill{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--mint-deep) 0%,var(--mint) 58%,var(--amber) 100%);
  transition:transform .12s linear;
}

/* ---------- 页脚：深色跑道 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,120px);
  background:linear-gradient(180deg,#081D38 0%,#061529 100%);
  color:var(--mist);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.footer-runway{
  height:10px;
  background:repeating-linear-gradient(115deg,var(--mint) 0 16px,transparent 16px 44px);
  opacity:.42;
}
.footer-watermark{
  position:absolute;
  right:clamp(4px,2vw,32px);
  bottom:-.06em;
  z-index:0;
  font-family:var(--font-sans);
  font-size:clamp(56px,13vw,190px);
  font-weight:800;
  line-height:.8;
  letter-spacing:.02em;
  color:transparent;
  -webkit-text-stroke:1px rgba(56,242,196,.16);
  pointer-events:none;
  user-select:none;
}
.footer-shell{
  position:relative;
  z-index:1;
  padding-top:clamp(36px,5vw,72px);
  padding-bottom:clamp(20px,3vw,36px);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.55fr);
  gap:clamp(28px,5vw,72px);
  padding-bottom:clamp(26px,4vw,44px);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.brand--footer{
  padding:0;
  border:0;
  background:transparent;
  border-radius:0;
  box-shadow:none;
}
.brand--footer:hover{background:transparent;box-shadow:none;border:0}
.brand--footer .brand-mark{width:38px;height:38px}
.footer-tagline{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:rgba(56,242,196,.85);
  max-width:none;
}
.footer-contact-line{
  font-size:14.5px;
  line-height:1.6;
  color:rgba(244,235,221,.9);
  max-width:none;
}
.footer-address{
  max-width:34ch;
  font-size:13px;
  line-height:1.7;
  color:rgba(216,228,232,.6);
}
.footer-nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,32px);
}
.footer-group-title{
  position:relative;
  padding-left:16px;
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--mint);
}
.footer-group-title::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  width:9px;height:9px;
  margin-top:-4.5px;
  background:currentColor;
  clip-path:polygon(0 0,100% 0,100% 60%,60% 100%,0 100%);
  opacity:.9;
}
.footer-list{display:grid;gap:10px}
.footer-link{
  display:inline-block;
  font-size:14px;
  color:rgba(216,228,232,.78);
  text-decoration:none;
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-link:hover{
  color:var(--cream);
  transform:translateX(3px);
  text-decoration:underline;
  text-decoration-color:rgba(56,242,196,.7);
  text-underline-offset:4px;
}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  padding-top:clamp(18px,2.4vw,26px);
  border-top:1px dashed rgba(216,228,232,.2);
  font-size:13px;
  color:rgba(216,228,232,.62);
}
.footer-copy{max-width:none}
.footer-icp{
  max-width:none;
  font-size:12px;
  letter-spacing:.1em;
  color:rgba(216,228,232,.55);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 26px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-family:var(--font-sans);
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  text-decoration:none;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn--primary{
  background:var(--mint);
  color:var(--night);
  box-shadow:0 18px 34px -22px rgba(56,242,196,.95);
}
.btn--primary:hover{background:#63F9D6;transform:translateY(-2px)}
.btn--ghost{
  background:transparent;
  color:var(--cream);
  border-color:var(--line-strong);
}
.btn--ghost:hover{border-color:var(--mint);color:var(--mint);transform:translateY(-2px)}
.btn--quiet{
  background:rgba(216,228,232,.08);
  color:var(--cream);
}
.btn--quiet:hover{background:rgba(216,228,232,.16)}
.btn--ink{
  background:transparent;
  color:var(--ink);
  border-color:var(--ink-line);
}
.btn--ink:hover{border-color:var(--mint-deep);color:var(--mint-deep);transform:translateY(-2px)}
.btn:active{transform:translateY(0)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  margin:clamp(20px,3vw,32px) 0 clamp(12px,2vw,20px);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li+li::before{content:"／";color:rgba(216,228,232,.32)}
.breadcrumbs a{color:rgba(216,228,232,.72);text-decoration:none}
.breadcrumbs a:hover{color:var(--mint)}
.breadcrumbs [aria-current="page"]{color:var(--mint)}
.surface-cream .breadcrumbs a{color:rgba(43,31,26,.62)}
.surface-cream .breadcrumbs [aria-current="page"]{color:var(--mint-deep)}
.surface-cream .breadcrumbs li+li::before{color:rgba(43,31,26,.28)}

/* ---------- 章节节奏 ---------- */
.section{padding:clamp(44px,6vw,92px) 0}
.section--tight{padding:clamp(26px,3.4vw,52px) 0}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px 28px;
  margin-bottom:clamp(22px,3vw,38px);
}
.section-index{
  display:block;
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.26em;
  color:rgba(56,242,196,.82);
}
.section-title{
  margin:0;
  font-size:clamp(26px,3.4vw,42px);
  font-weight:800;
  letter-spacing:.03em;
  color:var(--cream);
}
.surface-cream .section-title{color:var(--ink)}
.surface-cream .section-index{color:var(--mint-deep)}
.lead{
  max-width:62ch;
  font-size:clamp(16px,1.6vw,18.5px);
  line-height:1.8;
  color:rgba(216,228,232,.86);
}
.surface-cream .lead{color:rgba(43,31,26,.78)}

/* ---------- 展览说明牌 ---------- */
.plate{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--mint);
}
.plate::before{
  content:"";
  width:10px;height:10px;
  background:currentColor;
  clip-path:polygon(0 0,100% 0,100% 60%,60% 100%,0 100%);
}
.plate--amber{color:var(--amber)}
.plate--ink{color:var(--mint-deep)}

/* ---------- 切角面板 ---------- */
.panel{
  position:relative;
  padding:clamp(20px,3vw,34px);
  background:linear-gradient(158deg,rgba(18,59,102,.95) 0%,rgba(14,42,74,.88) 100%);
  box-shadow:inset 0 0 0 1px var(--line);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.panel--cream{
  background:var(--cream);
  color:var(--ink);
  box-shadow:inset 0 0 0 1px var(--ink-line);
}
.panel--flat{
  background:rgba(216,228,232,.05);
  box-shadow:inset 0 0 0 1px var(--line);
}

.slash-divider{
  height:7px;
  border:0;
  margin:clamp(28px,4vw,56px) 0;
  background:repeating-linear-gradient(115deg,rgba(56,242,196,.5) 0 2px,transparent 2px 15px);
}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  background:linear-gradient(150deg,var(--night-3) 0%,var(--night) 100%);
  box-shadow:inset 0 0 0 1px var(--line);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(196deg,rgba(56,242,196,.12) 0%,transparent 46%,rgba(7,26,51,.55) 100%);
  pointer-events:none;
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  filter:saturate(.86) contrast(1.05) brightness(.96);
}
.media-frame--plain::after{display:none}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--3x2{aspect-ratio:3/2}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--cine{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:rgba(216,228,232,.6);
}
.surface-cream .media-caption{color:rgba(43,31,26,.58)}
.media-data{
  position:absolute;
  left:0;
  bottom:0;
  z-index:2;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 14px;
  background:rgba(7,26,51,.78);
  color:var(--mint);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  clip-path:polygon(0 0,100% 0,100% 100%,10px 100%,0 calc(100% - 10px));
}

/* ---------- 分段控件 / 标签页 ---------- */
.segmented{
  display:inline-flex;
  flex-wrap:wrap;
  gap:4px;
  padding:4px;
  border-radius:var(--radius-pill);
  background:rgba(14,42,74,.82);
  box-shadow:inset 0 0 0 1px var(--line);
}
.segmented .segment,
.segmented [role="tab"],
.segmented button{
  appearance:none;
  border:0;
  padding:9px 18px;
  border-radius:var(--radius-pill);
  background:transparent;
  color:var(--mist);
  font-family:var(--font-sans);
  font-size:13.5px;
  font-weight:700;
  letter-spacing:.05em;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.segmented .segment:hover,
.segmented [role="tab"]:hover{color:var(--cream);background:rgba(216,228,232,.08)}
.segmented [aria-selected="true"],
.segmented [aria-pressed="true"],
.segmented .segment[aria-pressed="true"]{
  background:var(--mint-soft);
  color:var(--mint);
  box-shadow:inset 0 0 0 1px rgba(56,242,196,.45);
}
.surface-cream .segmented{background:rgba(43,31,26,.06);box-shadow:inset 0 0 0 1px var(--ink-line)}
.surface-cream .segmented .segment,
.surface-cream .segmented [role="tab"]{color:rgba(43,31,26,.72)}
.surface-cream .segmented [aria-selected="true"]{
  background:rgba(12,143,122,.12);
  color:var(--mint-deep);
  box-shadow:inset 0 0 0 1px rgba(12,143,122,.42);
}

/* ---------- 小签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border-radius:var(--radius-pill);
  background:var(--mint-soft);
  color:var(--mint);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  box-shadow:inset 0 0 0 1px rgba(56,242,196,.32);
}
.tag--amber{
  background:var(--amber-soft);
  color:var(--amber);
  box-shadow:inset 0 0 0 1px rgba(255,138,61,.36);
}
.tag--ghost{
  background:transparent;
  color:var(--mist);
  box-shadow:inset 0 0 0 1px var(--line-strong);
}

/* ---------- 12 栏网格 ---------- */
.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.4vw,32px);
}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}

/* ---------- 长文阅读 ---------- */
.prose{
  max-width:70ch;
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
}
.prose h2{font-size:clamp(22px,2.6vw,30px);margin-top:1.9em;color:inherit}
.prose h3{font-size:clamp(18px,2vw,22px);margin-top:1.6em;color:inherit}
.prose p,
.prose ul,
.prose ol,
.prose figure{margin-top:1em}
.prose ul{list-style:disc;padding-left:1.25em}
.prose ol{list-style:decimal;padding-left:1.25em}
.prose li+li{margin-top:.45em}
.prose a{color:var(--mint-deep);text-underline-offset:3px}
.prose strong{font-weight:800;color:inherit}
.prose blockquote{
  margin-top:1.4em;
  padding-left:18px;
  border-left:3px solid var(--amber);
  font-family:var(--font-mono);
  font-size:14px;
  line-height:1.9;
  color:rgba(43,31,26,.78);
}
.surface-night .prose blockquote{color:rgba(216,228,232,.82)}

/* ---------- 进入视口显现 ---------- */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .52s var(--ease),transform .52s var(--ease);
}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式：平板 ---------- */
@media (max-width:1080px){
  .nav-link{padding:9px 8px;font-size:14px}
  .primary-nav{padding-left:12px;gap:8px}
  .footer-top{grid-template-columns:1fr}
  .footer-address{max-width:46ch}
}

/* ---------- 响应式：移动导航 ---------- */
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;
    top:calc(100% + 10px);
    left:var(--gutter);
    right:var(--gutter);
    flex-direction:column;
    align-items:stretch;
    gap:8px;
    padding:14px;
    border-radius:22px;
    background:rgba(9,30,58,.985);
    box-shadow:0 34px 64px -30px rgba(0,0,0,.9),inset 0 0 0 1px var(--line-strong);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px) scale(.99);
    pointer-events:none;
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
  }
  .primary-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
    pointer-events:auto;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:2px;width:100%}
  .nav-link{display:block;padding:12px 14px;border-radius:12px;font-size:15px}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{
    background:var(--mint-soft);
    box-shadow:inset 0 0 0 1px rgba(56,242,196,.35);
  }
  .nav-cta{justify-content:center;margin-top:6px;padding:13px 18px}
  body.nav-open{overflow:hidden}
  .section{padding:clamp(34px,7vw,56px) 0}
  .footer-nav{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
}

/* ---------- 响应式：手机 ---------- */
@media (max-width:620px){
  .brand{padding:7px 14px 7px 8px;gap:10px}
  .brand-mark{width:30px;height:30px}
  .brand-line{display:none}
  .brand-name{font-size:15px;letter-spacing:.1em}
  .nav-toggle{padding:10px 15px;font-size:13px}
  .header-track{height:3px}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-base{flex-direction:column;align-items:flex-start;gap:8px}
  .footer-watermark{font-size:clamp(52px,20vw,96px);opacity:.8}
  .segment,.segmented [role="tab"]{padding:8px 14px;font-size:13px}
  .btn{width:100%;padding:14px 22px}
  .btn+.btn{margin-top:10px}
}

/* ---------- 尊重减少动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .has-js [data-reveal]{opacity:1;transform:none;transition:none}
  .header-track-fill{transition:none}
  .brand:hover,.nav-cta:hover,.btn:hover,.footer-link:hover{transform:none}
}