/* ============================================================
   顺发体育 · 共享站点样式 /assets/site.css
   深空蓝黑托底 · 金属银结构 · 戈壁暖沙温度 · 中国红行动
   ============================================================ */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:112px}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

:root{
  --ink:#0B1220;
  --ink-2:#0E1626;
  --steel:#1E2A3A;
  --steel-2:#26344A;
  --silver:#C9D3DE;
  --paper:#F7F3EA;
  --sand:#D8B98A;
  --sand-light:#EFE0C8;
  --red:#E23A2E;
  --red-deep:#A9231A;
  --cyan:#23C4B8;

  --line:rgba(201,211,222,.16);
  --line-soft:rgba(201,211,222,.1);
  --line-strong:rgba(201,211,222,.34);
  --silver-70:rgba(201,211,222,.72);
  --silver-55:rgba(201,211,222,.56);
  --ink-text:#1B2430;

  --font-display:"Source Han Serif SC","Noto Serif CJK SC","Songti SC","SimSun",Georgia,serif;
  --font-sans:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Sarasa Mono SC",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --max:1280px;
  --gutter:clamp(16px,3.4vw,40px);
  --radius:4px;
  --radius-lg:14px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:98px;
}

/* ---------- 中文排版基础 ---------- */
body{
  background:var(--ink);
  color:var(--silver);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.7;
  letter-spacing:.01em;
  overflow-wrap:break-word;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.08;
  color:var(--paper);
  letter-spacing:.01em;
  text-wrap:balance;
}
h1{font-size:clamp(36px,6vw,88px);line-height:1.02}
h2{font-size:clamp(26px,3.6vw,44px)}
h3{font-size:clamp(20px,2.2vw,26px);font-family:var(--font-sans);font-weight:800;line-height:1.3}
h4{font-size:17px;font-family:var(--font-sans);font-weight:700;line-height:1.4}
p{text-wrap:pretty}
strong{color:var(--paper);font-weight:700}
::selection{background:var(--red);color:var(--paper)}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}
.visually-hidden{
  position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
#main-content{display:block;outline:none;min-height:40vh}

/* ---------- 容器与区块 ---------- */
.container{width:100%;max-width:var(--max);margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:880px}
.section{padding-block:clamp(44px,6.4vw,92px)}
.rule{height:1px;background:var(--line);border:0}
.tick-rule{
  height:11px;
  background-image:repeating-linear-gradient(to right,rgba(201,211,222,.42) 0 1px,transparent 1px 14px);
  border-bottom:1px solid var(--line);
}

/* ---------- 索引标签 ---------- */
.index-tag{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--sand);line-height:1;
}
.index-tag::before{content:"";width:24px;height:1px;background:currentColor;opacity:.8}

/* ---------- 章节头 ---------- */
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:14px 32px;padding-bottom:18px;border-bottom:1px solid var(--line);
  margin-bottom:clamp(22px,3.2vw,40px);
}
.section-head__title{font-size:clamp(24px,3.4vw,40px);line-height:1.05;color:var(--paper)}
.section-head__note{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--silver-55);
}

/* ---------- 按钮 ---------- */
.btn{
  --btn-bg:transparent;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:999px;border:1px solid var(--line-strong);
  font-family:var(--font-sans);font-size:14px;font-weight:600;letter-spacing:.04em;
  line-height:1.2;color:var(--paper);background:var(--btn-bg);text-align:center;
  transition:background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.btn:hover{border-color:var(--silver);background:rgba(201,211,222,.09)}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--red);border-color:var(--red);color:var(--paper)}
.btn--primary:hover{background:var(--red-deep);border-color:var(--red-deep)}
.btn--ghost{background:transparent;border-color:var(--line-strong);color:var(--silver)}
.btn--ghost:hover{color:var(--paper);border-color:var(--sand)}
.btn--sm{padding:9px 18px;font-size:13px}
.btn--block{display:flex;width:100%}

/* ---------- 状态点 ---------- */
.status-dot{
  display:inline-block;flex:0 0 auto;width:7px;height:7px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 0 3px rgba(35,196,184,.18);
}
.status-dot--red{background:var(--red);box-shadow:0 0 0 3px rgba(226,58,46,.2)}
.status-dot--sand{background:var(--sand);box-shadow:0 0 0 3px rgba(216,185,138,.2)}

/* ---------- 卡片 / 标签 / 数据 ---------- */
.panel{
  background:var(--steel);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:clamp(18px,2.6vw,30px);
  transition:border-color .26s var(--ease),background .26s var(--ease);
}
.panel:hover{border-color:rgba(226,58,46,.6)}
.panel--flat{background:rgba(30,42,58,.55)}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;border:1px solid var(--line-strong);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--silver);line-height:1.2;
}
.chip--sand{color:var(--sand);border-color:rgba(216,185,138,.55)}
.chip--cyan{color:var(--cyan);border-color:rgba(35,196,184,.5)}
.chip--red{color:var(--paper);border-color:var(--red);background:rgba(226,58,46,.16)}
.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-family:var(--font-mono);font-weight:700;font-size:clamp(30px,4.4vw,58px);
  line-height:1;letter-spacing:-.02em;color:var(--paper);
  font-variant-numeric:tabular-nums;
}
.stat__value--red{color:var(--red)}
.stat__unit{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--sand);
}
.stat__label{font-size:13px;line-height:1.6;color:var(--silver-70)}

/* ---------- 链接 ---------- */
.link-underline{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  color:var(--silver);padding-bottom:2px;
}
.link-underline::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--cyan);transform:scaleX(0);transform-origin:center;
  transition:transform .26s var(--ease);
}
.link-underline:hover,.link-underline:focus-visible{color:var(--paper)}
.link-underline:hover::after,.link-underline:focus-visible::after{transform:scaleX(1)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--silver-55);
  padding-block:18px;
}
.breadcrumbs a{color:var(--silver);border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.breadcrumbs a:hover,.breadcrumbs a:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumbs__sep{color:rgba(201,211,222,.32)}
.breadcrumbs [aria-current="page"]{color:var(--sand)}

/* ---------- 网格 ---------- */
.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--rail{grid-template-columns:minmax(0,1fr) 96px}

/* ---------- 图片容器基础 ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--radius-lg);border:1px solid var(--line);
  aspect-ratio:16/10;
  background:
    linear-gradient(140deg,rgba(216,185,138,.22),rgba(11,18,32,0) 58%),
    linear-gradient(320deg,rgba(35,196,184,.14),rgba(30,42,58,.92) 62%),
    var(--steel);
}
.media-frame img{width:100%;height:100%;object-fit:cover;display:block}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--hero{aspect-ratio:16/9}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 14px;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--silver);background:linear-gradient(to top,rgba(11,18,32,.9),rgba(11,18,32,0));
}

/* ---------- 正文区 ---------- */
.prose{max-width:74ch;font-size:16.5px;line-height:1.85;color:rgba(201,211,222,.88)}
.prose>*+*{margin-top:1.05em}
.prose h2{margin-top:1.9em;font-size:clamp(22px,2.6vw,30px)}
.prose h3{margin-top:1.6em}
.prose h4{margin-top:1.4em}
.prose ul,.prose ol{display:flex;flex-direction:column;gap:.55em}
.prose li{position:relative;padding-left:1.25em}
.prose li::before{
  content:"";position:absolute;left:0;top:.78em;width:9px;height:1px;background:var(--red);
}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(35,196,184,.45)}
.prose a:hover{border-bottom-color:var(--cyan)}
.prose blockquote{
  border-left:2px solid var(--sand);padding-left:18px;color:var(--silver-70);font-style:normal;
}
.surface-paper{
  background:var(--paper);color:var(--ink-text);
  border-radius:var(--radius-lg);
  padding:clamp(22px,4vw,56px);
}
.surface-paper h1,.surface-paper h2,.surface-paper h3,.surface-paper h4{color:var(--ink)}
.surface-paper .prose{color:#2A3646}
.surface-paper .prose strong{color:var(--ink)}
.surface-paper .prose a{color:var(--red-deep);border-bottom-color:rgba(169,35,26,.45)}
.surface-paper :where(a,button,summary):focus-visible{outline-color:var(--red-deep)}
.surface-sand{
  background:var(--sand-light);color:var(--ink-text);
  border-radius:var(--radius-lg);
  padding:clamp(22px,4vw,48px);
}
.surface-sand h1,.surface-sand h2,.surface-sand h3,.surface-sand h4{color:var(--ink)}

/* ============================================================
   头部
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--ink);
  color:var(--silver);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease);
}
.site-header[data-scrolled]{box-shadow:0 14px 34px rgba(0,0,0,.5)}

.skip-link{
  position:fixed;top:10px;left:12px;z-index:220;
  padding:10px 20px;border-radius:999px;
  background:var(--paper);color:var(--ink);
  font-size:14px;font-weight:700;letter-spacing:.04em;
  transform:translateY(-180%);
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:translateY(0);outline:2px solid var(--red);outline-offset:2px}

/* 命令条 */
.command-bar{
  display:flex;align-items:center;gap:14px;
  height:32px;
  max-width:var(--max);margin-inline:auto;
  padding-inline:var(--gutter);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--silver-55);
  border-bottom:1px solid var(--line-soft);
}
.command-bar__item{white-space:nowrap}
.command-bar__item:first-child{color:var(--sand)}
.command-bar__divider{width:1px;height:10px;background:var(--line-strong);flex:0 0 auto}
.command-bar__status{
  margin-left:auto;display:inline-flex;align-items:center;gap:8px;
  color:var(--sand);letter-spacing:.12em;white-space:nowrap;
}

/* 品牌行 */
.header-bar{
  display:flex;align-items:center;gap:clamp(10px,2vw,28px);
  max-width:var(--max);margin-inline:auto;
  padding:13px var(--gutter);
  min-height:64px;
}
.brand{
  display:flex;align-items:center;gap:11px;flex:0 0 auto;
  order:1;transition:opacity .2s var(--ease);
}
.brand:hover{opacity:.86}
.brand__mark{
  position:relative;width:38px;height:38px;flex:0 0 auto;border-radius:50%;
  border:1px solid rgba(201,211,222,.32);
  background:
    radial-gradient(circle at center,var(--red) 0 5.5px,transparent 5.5px),
    radial-gradient(circle at center,transparent 0 10px,rgba(216,185,138,.6) 10px 11px,transparent 11px),
    radial-gradient(circle at center,transparent 0 15px,rgba(201,211,222,.28) 15px 16px,transparent 16px),
    linear-gradient(150deg,#1b2739,#0c1422);
}
.brand__text{display:flex;flex-direction:column;gap:3px;line-height:1.05}
.brand__name{
  font-family:var(--font-display);font-weight:800;font-size:19px;
  letter-spacing:.08em;color:var(--paper);
}
.brand__sub{
  font-family:var(--font-mono);font-size:9px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--sand);
}

/* 导航 */
.site-nav{
  order:2;display:flex;align-items:center;
  gap:clamp(2px,.9vw,10px);
  margin-left:auto;
}
.site-nav a{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:10px 9px;border-radius:var(--radius);
  font-size:14px;font-weight:500;color:var(--silver);
  transition:color .2s var(--ease),background .2s var(--ease);
  white-space:nowrap;
}
.site-nav a::after{
  content:"";position:absolute;left:9px;right:9px;bottom:3px;height:2px;
  background:var(--red);transform:scaleX(0);transform-origin:center;
  transition:transform .28s var(--ease);
}
.site-nav a:hover{color:var(--paper);background:rgba(201,211,222,.06)}
.site-nav a:hover::after,.site-nav a:focus-visible::after{transform:scaleX(1)}
.nav-index{
  font-family:var(--font-mono);font-size:9.5px;letter-spacing:.06em;
  color:rgba(201,211,222,.42);transition:color .2s var(--ease);
}
.site-nav a:hover .nav-index{color:var(--sand)}
.site-nav a[aria-current="page"]{color:var(--paper)}
.site-nav a[aria-current="page"] .nav-index{color:var(--paper)}
.site-nav a[aria-current="page"]::after{transform:scaleX(1)}
.site-nav a[aria-current="page"]::before{
  content:"";position:absolute;top:6px;left:-1px;
  width:5px;height:5px;border-radius:50%;background:var(--red);
}

/* CTA */
.header-cta{order:3;flex:0 0 auto}

/* 汉堡按钮 */
.nav-toggle{
  order:4;display:none;
  width:42px;height:42px;flex:0 0 auto;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
  border:1px solid var(--line-strong);border-radius:50%;
  background:rgba(30,42,58,.55);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--sand);background:rgba(30,42,58,.9)}
.nav-toggle__bar{
  display:block;width:16px;height:2px;border-radius:2px;
  background:var(--silver);
  transition:transform .26s var(--ease),opacity .18s var(--ease);
}
.site-header[data-open] .nav-toggle{border-color:var(--red);background:rgba(226,58,46,.16)}
.site-header[data-open] .nav-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bar:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 滚动进度 */
.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--red) 0%,var(--red) 42%,var(--sand) 78%,var(--cyan) 100%);
  pointer-events:none;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,7vw,110px);
  background:linear-gradient(180deg,var(--ink) 0%,var(--ink-2) 46%,var(--ink) 100%);
  color:var(--silver);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,
    var(--red) 0 20%,
    var(--sand) 20% 46%,
    rgba(201,211,222,.28) 46% 100%);
}
.site-footer::after{
  content:"";position:absolute;right:-130px;bottom:-170px;
  width:440px;height:440px;border-radius:50%;
  background:radial-gradient(circle at center,rgba(216,185,138,.17),rgba(216,185,138,0) 68%);
  pointer-events:none;
}
.footer-inner{
  position:relative;z-index:1;
  max-width:var(--max);margin-inline:auto;
  padding:clamp(38px,5.6vw,68px) var(--gutter) clamp(24px,3.2vw,40px);
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1.35fr);
  gap:clamp(28px,5vw,64px);
}
.footer-lead__kicker{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--cyan);margin-bottom:16px;
}
.footer-lead__kicker::before{content:"";width:26px;height:1px;background:currentColor}
.footer-lead__mark{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(28px,3.6vw,42px);line-height:1.04;letter-spacing:.04em;
  color:var(--paper);margin-bottom:14px;
}
.footer-lead__statement{
  max-width:34ch;font-size:15px;line-height:1.8;
  color:var(--silver-70);margin-bottom:20px;
}
.footer-lead__version{
  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(--sand);
  padding:7px 14px;border:1px solid rgba(216,185,138,.35);border-radius:999px;
}
.footer-cols{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2.6vw,32px);
}
.footer-col__title{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--sand);
  padding-bottom:10px;margin-bottom:10px;
  border-bottom:1px solid var(--line);
}
.footer-col ul{display:flex;flex-direction:column;gap:1px}
.footer-col a{
  display:inline-block;padding:5px 0;font-size:14px;
  color:rgba(201,211,222,.82);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-col a:hover,.footer-col a:focus-visible{color:var(--paper);border-bottom-color:var(--red)}
.footer-col a[aria-current="page"]{color:var(--cyan);border-bottom-color:rgba(35,196,184,.5)}

.footer-contact{
  position:relative;z-index:1;
  max-width:var(--max);margin-inline:auto;
  padding-inline:var(--gutter);
}
.footer-contact__grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));
  gap:clamp(16px,2.2vw,26px) clamp(20px,3vw,40px);
  padding-block:clamp(22px,3vw,32px);
  border-top:1px solid var(--line);
}
.footer-contact__item dt{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;
  text-transform:uppercase;color:rgba(201,211,222,.55);margin-bottom:6px;
}
.footer-contact__item dd{
  margin:0;display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;line-height:1.65;color:var(--silver);
}
.copy-btn{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;
  text-transform:uppercase;line-height:1.4;
  padding:3px 10px;border-radius:999px;
  border:1px solid var(--line-strong);color:var(--silver-70);
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.copy-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.copy-btn[data-copied]{
  border-color:var(--cyan);color:var(--cyan);background:rgba(35,196,184,.12);
}
.footer-legal{
  position:relative;z-index:1;
  max-width:var(--max);margin-inline:auto;
  padding:16px var(--gutter) 26px;
  border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.1em;
  color:rgba(201,211,222,.5);
}
.footer-legal__sep{color:rgba(201,211,222,.28)}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .site-nav a{padding:10px 7px;font-size:13.5px}
  .nav-index{display:none}
  .header-cta{padding:8px 14px;font-size:12.5px}
}

@media (max-width:940px){
  html{scroll-padding-top:92px}
  .header-bar{padding:11px var(--gutter);gap:10px}
  .nav-toggle{display:flex}
  .header-cta{margin-left:auto;order:3}
  .brand{order:1}
  .site-nav{
    order:5;margin-left:0;
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;
    padding:8px var(--gutter) 20px;
    background:var(--steel);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    box-shadow:0 26px 48px rgba(0,0,0,.55);
    max-height:calc(100vh - 92px);overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  .site-nav a{
    padding:14px 6px;font-size:15px;border-bottom:1px solid var(--line-soft);
    border-radius:0;
  }
  .site-nav a::after{display:none}
  .site-nav a .nav-index{display:inline;font-size:11px}
  .site-nav a[aria-current="page"]{background:rgba(226,58,46,.14)}
  .site-nav a[aria-current="page"]::before{display:none}
  .site-header[data-open] .site-nav{
    opacity:1;visibility:visible;transform:translateY(0);
  }
  .footer-inner{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:760px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--rail{grid-template-columns:minmax(0,1fr)}
  .command-bar{height:28px;gap:10px;font-size:9.5px;letter-spacing:.14em}
  .footer-cols{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media (max-width:640px){
  .command-bar__item--sync,.command-bar__divider{display:none}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .brand__mark{width:34px;height:34px}
  .brand__name{font-size:17px}
}

@media (max-width:600px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:420px){
  .brand__sub{display:none}
  .header-cta{padding:8px 12px;font-size:12px}
  .nav-toggle{width:38px;height:38px}
  .footer-legal{font-size:9.5px;letter-spacing:.06em}
}

/* ---------- 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;
  }
  .site-nav{transition:none}
  .scroll-progress{transition:none}
}