/* ============================================================
   安博体育 · 中文专区 — 共享样式 /assets/site.css
   夜间战术板：墨绿底 + 荧光青结构 + 琥珀金数据
   ============================================================ */

/* ---------- 1. Reset 与全局 ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

:root{
  --ink-900:#07120F;
  --ink-800:#0E2A24;
  --ink-700:#17453B;
  --cyan:#38F0D0;
  --cyan-soft:#8CFCE6;
  --amber:#F2A73B;
  --amber-deep:#C97F1E;
  --mist:#E8F2EE;
  --gray-cyan:#A9C4BC;
  --line:#2B4F46;
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --maxw:1180px;
  --radius:14px;
  --cut:16px;
  --dur:260ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-panel:0 18px 44px -30px rgba(0,0,0,.95);
}

body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  color:var(--mist);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(780px 460px at 84% -8%, rgba(56,240,208,.13), transparent 68%),
    radial-gradient(620px 380px at 3% 5%, rgba(242,167,59,.09), transparent 70%),
    repeating-linear-gradient(0deg, rgba(43,79,70,.30) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(90deg, rgba(43,79,70,.17) 0 1px, transparent 1px 72px);
  background-repeat:no-repeat,no-repeat,repeat,repeat;
}

h1,h2,h3,h4,p,figure,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg{display:block;max-width:100%;}
a{color:var(--cyan);text-decoration:none;transition:color var(--dur) var(--ease);}
a:hover{color:var(--cyan-soft);}
button{font:inherit;color:inherit;}
::selection{background:var(--cyan);color:var(--ink-900);}

:focus-visible{
  outline:2px solid var(--cyan-soft);
  outline-offset:3px;
  border-radius:4px;
}

.visually-hidden{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
}

.skip-link{
  position:absolute;
  top:-80px;left:16px;
  z-index:120;
  display:inline-block;
  padding:10px 18px;
  border-radius:0 0 10px 10px;
  background:var(--cyan);
  color:var(--ink-900);
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{
  top:0;
  color:var(--ink-900);
  outline-offset:0;
}

/* ---------- 2. 版式容器 ---------- */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,32px);
}

.section{padding-block:clamp(40px,6vw,84px);}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px 24px;
  padding-bottom:14px;
  margin-bottom:clamp(20px,3vw,32px);
  border-bottom:1px solid var(--line);
}

.eyebrow{
  display:block;
  margin-bottom:10px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}

.section-title{
  font-size:clamp(24px,3.4vw,40px);
  font-weight:800;
  line-height:1.15;
  letter-spacing:-.01em;
  color:var(--mist);
}

.prose{
  max-width:68ch;
  font-size:17px;
  line-height:1.75;
  color:var(--mist);
}
.prose p + p{margin-top:1.2em;}
.prose h3{margin-top:1.6em;font-size:22px;line-height:1.35;}
.prose strong{color:var(--cyan-soft);}

.link-arrow{
  display:inline-block;
  padding-bottom:2px;
  border-bottom:1px solid rgba(56,240,208,.38);
  color:var(--cyan);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
}
.link-arrow:hover{border-bottom-color:var(--cyan-soft);}

/* ---------- 3. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--gray-cyan);
}
.breadcrumb a{
  color:var(--gray-cyan);
  border-bottom:1px solid transparent;
}
.breadcrumb a:hover{color:var(--cyan-soft);border-bottom-color:var(--cyan-soft);}
.breadcrumb__sep{color:var(--line);}

/* ---------- 4. 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:14px;
  font-weight:700;
  letter-spacing:.04em;
  line-height:1.2;
  white-space:nowrap;
  cursor:pointer;
  transition:transform var(--dur) var(--ease),
             background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.btn--primary{
  background:var(--amber);
  border-color:var(--amber-deep);
  color:var(--ink-900);
  box-shadow:0 10px 24px -16px rgba(242,167,59,.95);
}
.btn--primary:hover{
  background:#FFBE57;
  border-color:var(--amber);
  color:var(--ink-900);
  transform:translateY(-2px);
}
.btn--primary:active{background:var(--amber-deep);transform:translateY(0);}
.btn--ghost{
  background:rgba(14,42,36,.65);
  border-color:rgba(56,240,208,.45);
  color:var(--cyan);
}
.btn--ghost:hover{
  border-color:var(--cyan);
  background:rgba(23,69,59,.75);
  color:var(--cyan-soft);
  transform:translateY(-2px);
}
.btn--sm{padding:8px 15px;font-size:13px;}

/* ---------- 5. 标签与数据 ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(23,69,59,.45);
  color:var(--gray-cyan);
  font-size:11px;
  font-weight:700;
  letter-spacing:.14em;
  line-height:1.6;
  white-space:nowrap;
}
.tag--cyan{background:var(--cyan);border-color:var(--cyan);color:var(--ink-900);}
.tag--amber{background:var(--amber);border-color:var(--amber-deep);color:var(--ink-900);}
.tag--mono{font-family:var(--font-mono);letter-spacing:.06em;}

.stats{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(120px,1fr));
  gap:12px;
}
.stat{
  padding:14px 16px;
  border:1px solid var(--line);
  border-radius:10px;
  background:rgba(14,42,36,.72);
}
.stat__value{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(22px,3vw,30px);
  font-weight:700;
  letter-spacing:.04em;
  line-height:1.2;
  color:var(--amber);
}
.stat__label{
  display:block;
  margin-top:4px;
  font-size:11px;
  letter-spacing:.16em;
  color:var(--gray-cyan);
}

/* ---------- 6. 面板与网格 ---------- */
.panel{
  position:relative;
  padding:clamp(20px,3vw,32px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    linear-gradient(158deg, rgba(23,69,59,.55) 0%, rgba(14,42,36,.95) 46%, rgba(7,18,15,.98) 100%);
  box-shadow:var(--shadow-panel);
}
.panel--cut{
  border-radius:0;
  clip-path:polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}
.panel--raised{transition:transform var(--dur) var(--ease), border-color var(--dur) var(--ease);}
.panel--raised:hover{
  transform:translateY(-3px);
  border-color:rgba(56,240,208,.55);
}

.seam{
  height:1px;
  border:0;
  background:linear-gradient(90deg, transparent, var(--line) 12%, var(--line) 88%, transparent);
}

.grid{display:grid;gap:clamp(16px,2.4vw,28px);}
.grid--7-5{grid-template-columns:7fr 5fr;}
.grid--5-7{grid-template-columns:5fr 7fr;}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}

/* ---------- 7. 图文容器（图片占位基础规则） ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background-color:var(--ink-800);
  background-image:
    radial-gradient(circle at 74% 18%, rgba(56,240,208,.26), transparent 58%),
    radial-gradient(circle at 16% 88%, rgba(242,167,59,.18), transparent 62%),
    repeating-linear-gradient(0deg, rgba(43,79,70,.45) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(90deg, rgba(43,79,70,.30) 0 1px, transparent 1px 40px),
    linear-gradient(160deg, #17453B 0%, #07120F 82%);
}
.media img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media--16x9{aspect-ratio:16 / 9;}
.media--4x3{aspect-ratio:4 / 3;}
.media--1x1{aspect-ratio:1 / 1;}
.media--wide{aspect-ratio:21 / 9;}
.media__label{
  position:absolute;
  left:12px;
  bottom:12px;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(7,18,15,.82);
  border:1px solid rgba(56,240,208,.4);
  color:var(--cyan-soft);
  font-size:11px;
  letter-spacing:.14em;
  line-height:1.6;
}

/* ---------- 8. 折叠资料卡 ---------- */
.disclosure{
  border:1px solid var(--line);
  border-radius:12px;
  background:rgba(14,42,36,.72);
  overflow:hidden;
  transition:border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.disclosure + .disclosure{margin-top:10px;}
.disclosure[data-open]{
  border-color:rgba(56,240,208,.65);
  background:rgba(23,69,59,.72);
}
.disclosure__trigger{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  width:100%;
  padding:16px 18px;
  border:0;
  border-left:3px solid transparent;
  background:none;
  color:var(--mist);
  font-size:16px;
  font-weight:700;
  line-height:1.5;
  text-align:left;
  cursor:pointer;
  transition:color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             background-color var(--dur) var(--ease);
}
.disclosure__trigger:hover{background:rgba(23,69,59,.65);}
.disclosure[data-open] .disclosure__trigger{
  border-left-color:var(--cyan);
  color:var(--cyan-soft);
}
.disclosure__trigger::after{
  content:"+";
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:18px;
  font-weight:400;
  color:var(--cyan);
}
.disclosure[data-open] .disclosure__trigger::after{content:"–";}
.disclosure__panel{
  display:grid;
  grid-template-rows:0fr;
  visibility:hidden;
  transition:grid-template-rows 300ms var(--ease), visibility 0s linear 300ms;
}
.disclosure[data-open] .disclosure__panel{
  grid-template-rows:1fr;
  visibility:visible;
  transition:grid-template-rows 300ms var(--ease), visibility 0s linear 0s;
}
.disclosure__inner{
  overflow:hidden;
  padding-inline:18px;
  color:var(--gray-cyan);
  font-size:15px;
  line-height:1.75;
}
.disclosure[data-open] .disclosure__inner{padding-block:0 18px;}

/* ---------- 9. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,18,15,.93);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  transition:box-shadow var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.site-header[data-condensed]{
  background:rgba(7,18,15,.98);
  box-shadow:0 18px 34px -30px #000;
}

.header-inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(12px,2vw,18px) clamp(16px,4vw,32px) 0;
  transition:padding var(--dur) var(--ease);
}

.header-top{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:12px 16px;
}

.header-mark{
  justify-self:start;
  font-size:11px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--gray-cyan);
  white-space:nowrap;
  transition:opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.header-brand{
  justify-self:center;
  display:flex;
  flex-direction:column;
  align-items:center;
  text-decoration:none;
  color:var(--mist);
  line-height:1.1;
}
.header-brand:hover{color:var(--mist);}

.brand-name{
  font-size:clamp(20px,2.4vw,28px);
  font-weight:800;
  letter-spacing:.06em;
  transition:font-size var(--dur) var(--ease);
}
.brand-sub{
  margin-top:5px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.34em;
  color:var(--cyan);
  transition:font-size var(--dur) var(--ease), opacity var(--dur) var(--ease), margin var(--dur) var(--ease);
}

.header-tools{
  justify-self:end;
  display:flex;
  align-items:center;
  gap:10px;
}

.version-badge{
  display:inline-flex;
  align-items:center;
  padding:4px 10px;
  border:1px solid rgba(242,167,59,.55);
  border-radius:6px;
  background:rgba(242,167,59,.1);
  color:var(--amber);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  line-height:1.6;
  white-space:nowrap;
}

.header-cta{white-space:nowrap;}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  padding:0;
  border:1px solid rgba(56,240,208,.45);
  border-radius:10px;
  background:rgba(14,42,36,.8);
  color:var(--cyan);
  cursor:pointer;
  transition:border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(23,69,59,.9);}

.nav-toggle-bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  background:currentColor;
  transition:background-color var(--dur) var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:currentColor;
  transition:transform var(--dur) var(--ease), top var(--dur) var(--ease);
}
.nav-toggle-bars::before{top:-6px;}
.nav-toggle-bars::after{top:6px;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{top:0;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:0;transform:rotate(-45deg);}

.site-nav{
  margin-top:12px;
  border-top:1px solid rgba(43,79,70,.75);
  transition:margin-top var(--dur) var(--ease);
}
.nav-list{
  display:flex;
  flex-wrap:wrap;
  align-items:stretch;
  justify-content:center;
  gap:2px clamp(2px,1.4vw,20px);
}
.nav-item{display:flex;}
.nav-link{
  display:block;
  padding:12px 12px 10px;
  border-bottom:2px solid transparent;
  color:var(--gray-cyan);
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  line-height:1.4;
  white-space:nowrap;
  transition:color var(--dur) var(--ease), border-color var(--dur) var(--ease), padding var(--dur) var(--ease);
}
.nav-link:hover{color:var(--mist);border-bottom-color:rgba(56,240,208,.55);}
.nav-link[aria-current="page"]{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
}

.scroll-meter{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  overflow:hidden;
  background:rgba(43,79,70,.55);
}
.scroll-meter__fill{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg, var(--cyan), var(--amber));
  transition:transform 120ms linear;
}

/* 收窄态 */
.site-header[data-condensed] .header-inner{padding-top:6px;}
.site-header[data-condensed] .header-mark{
  opacity:0;
  transform:translateY(-6px);
  pointer-events:none;
}
.site-header[data-condensed] .brand-name{font-size:clamp(17px,1.9vw,21px);}
.site-header[data-condensed] .brand-sub{
  margin-top:2px;
  font-size:9px;
  opacity:.75;
}
.site-header[data-condensed] .site-nav{margin-top:4px;}
.site-header[data-condensed] .nav-link{padding-block:8px;}
.site-header[data-condensed] .btn--sm{padding:6px 12px;font-size:12px;}

/* ---------- 10. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  padding-bottom:72px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, #0E2A24 0%, #07120F 86%);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:linear-gradient(90deg, transparent, var(--cyan) 22%, var(--amber) 78%, transparent);
  opacity:.55;
}

.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.1fr;
  gap:clamp(24px,4vw,56px);
  padding-block:clamp(32px,5vw,60px);
}

.footer-brand-col{min-width:0;}
.footer-brand{
  display:inline-flex;
  flex-direction:column;
  gap:2px;
  text-decoration:none;
  color:var(--mist);
}
.footer-brand:hover{color:var(--mist);}
.footer-brand .brand-name{font-size:20px;letter-spacing:.08em;}
.footer-brand .brand-sub{font-size:10px;letter-spacing:.3em;}

.footer-note{
  max-width:32ch;
  margin-top:14px;
  color:var(--gray-cyan);
  font-size:14px;
  line-height:1.75;
}
.footer-icp{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--gray-cyan);
}

.footer-col{min-width:0;}
.footer-title{
  margin-bottom:14px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--cyan);
}
.footer-title--gap{margin-top:24px;}

.footer-list{display:grid;gap:10px;}
.footer-list a{
  display:inline-block;
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  color:var(--mist);
  font-size:14px;
  line-height:1.6;
}
.footer-list a:hover{
  color:var(--cyan-soft);
  border-bottom-color:rgba(140,252,230,.5);
}

.footer-list--contact{gap:14px;}
.footer-list--contact li{min-width:0;}
.footer-key{
  display:block;
  margin-bottom:2px;
  font-size:10px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--gray-cyan);
}
.footer-value{
  display:block;
  color:var(--mist);
  font-size:14px;
  line-height:1.6;
  overflow-wrap:anywhere;
}
.footer-value--mono{
  font-family:var(--font-mono);
  letter-spacing:.03em;
  color:var(--amber);
}

.footer-hours{
  margin-top:16px;
  padding-top:14px;
  border-top:1px dashed var(--line);
  color:var(--gray-cyan);
  font-size:13px;
  line-height:1.7;
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-block:20px;
  border-top:1px solid var(--line);
  color:var(--gray-cyan);
  font-size:12px;
  letter-spacing:.06em;
}
.footer-legal-note{opacity:.82;}

.feedback-tab{
  position:fixed;
  right:clamp(12px,2vw,24px);
  bottom:clamp(12px,2vw,24px);
  z-index:90;
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:12px 20px;
  border-radius:999px;
  border:1px solid var(--amber-deep);
  background:var(--amber);
  color:var(--ink-900);
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1.2;
  box-shadow:0 16px 34px -18px rgba(242,167,59,.95), 0 0 0 4px rgba(7,18,15,.55);
  transition:transform var(--dur) var(--ease),
             background-color var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.feedback-tab::before{
  content:"";
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--ink-900);
  box-shadow:0 0 0 3px rgba(7,18,15,.16);
}
.feedback-tab:hover{
  background:#FFBE57;
  color:var(--ink-900);
  transform:translateY(-3px);
  box-shadow:0 20px 40px -18px rgba(242,167,59,1), 0 0 0 4px rgba(7,18,15,.55);
}
.feedback-tab:active{transform:translateY(0);}

/* ---------- 11. 显现动效 ---------- */
:root.has-js [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity 480ms var(--ease), transform 480ms var(--ease);
  transition-delay:var(--reveal-delay, 0ms);
  will-change:opacity, transform;
}
:root.has-js [data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

/* ---------- 12. 响应式 ---------- */
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1.4fr 1fr;}
  .footer-grid > .footer-col:last-child{grid-column:1 / -1;}
}

@media (max-width:900px){
  body{font-size:16px;}

  .header-top{grid-template-columns:1fr auto;}
  .header-mark{display:none;}
  .header-brand{justify-self:start;align-items:flex-start;}
  .header-tools{justify-self:end;}
  .nav-toggle{display:inline-flex;}

  .site-nav{
    display:none;
    margin-top:8px;
    padding-bottom:6px;
    border-top:0;
  }
  .site-nav[data-open]{
    display:block;
    animation:nav-drop 240ms var(--ease) both;
    border-top:1px solid var(--line);
  }
  .nav-list{flex-direction:column;gap:0;align-items:stretch;padding-top:6px;}
  .nav-item{display:block;}
  .nav-link{
    padding:14px 12px 14px 16px;
    border-bottom:1px solid rgba(43,79,70,.6);
    border-left:3px solid transparent;
    font-size:15px;
    white-space:normal;
  }
  .nav-link:hover{border-bottom-color:rgba(43,79,70,.6);background:rgba(23,69,59,.6);}
  .nav-link[aria-current="page"]{
    border-left-color:var(--cyan);
    border-bottom-color:rgba(43,79,70,.6);
    background:rgba(56,240,208,.08);
  }

  .grid--7-5,
  .grid--5-7,
  .grid--3,
  .grid--2{grid-template-columns:minmax(0,1fr);}

  .footer-grid{grid-template-columns:minmax(0,1fr);gap:32px;}
  .footer-grid > .footer-col:last-child{grid-column:auto;}
  .footer-note{max-width:none;}
}

@media (max-width:640px){
  .header-inner{padding-top:10px;}
  .header-tools{gap:8px;}
  .brand-name{font-size:19px;}
  .brand-sub{font-size:10px;letter-spacing:.28em;}
  .version-badge{font-size:11px;padding:3px 8px;}
  .feedback-tab{font-size:12px;padding:10px 16px;gap:7px;}
  .footer-base{flex-direction:column;align-items:flex-start;}
}

@media (max-width:430px){
  .header-cta{display:none;}
}

@keyframes nav-drop{
  from{opacity:0;transform:translateY(-8px);}
  to{opacity:1;transform:none;}
}

/* ---------- 13. 降低动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  :root.has-js [data-reveal]{
    opacity:1;
    transform:none;
  }
  .disclosure__panel{transition:none;}
}