/* ============================================================
   壹号APP · 共享站点样式 /assets/site.css
   档案室 × 终端界面｜深墨蓝 · 暖纸色 · 品牌红 · 荧光青绿
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#0B1B2B;
  --paper:#F4EFE6;
  --paper-raised:#FBF7F0;
  --red:#D13A2F;
  --red-deep:#B22D24;
  --silver:#B8C4CE;
  --mint:#39F2C8;
  --ink-deep:#14202E;
  --slate:#66788A;
  --line:#2C4053;
  --gold:#C9A46A;
  --teal:#1D7F8C;

  --line-soft:rgba(44,64,83,.18);
  --line-ink:rgba(140,164,184,.22);
  --silver-dim:rgba(184,196,206,.72);

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

  --shell:1220px;
  --gutter:clamp(16px,4vw,40px);
  --radius-card:14px;
  --radius-pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.24s;
  --header-offset:88px;
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-deep);
  background-color:var(--paper);
  background-image:radial-gradient(rgba(44,64,83,.055) 1px,transparent 1px);
  background-size:22px 22px;
  background-position:-1px -1px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img,svg,video,canvas{max-width:100%;height:auto;display:block}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
a{color:inherit;text-decoration:none}
hr{border:0;border-top:1px solid var(--line-soft);margin:0}
::selection{background:var(--mint);color:#062A22}
[hidden]{display:none !important}

/* ---------- 3. 标题与文字 ---------- */
h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.12;
  color:var(--ink-deep);
}
h1{font-size:clamp(2.25rem,5.2vw,4.25rem);line-height:1.04}
h2{font-size:clamp(1.75rem,3.2vw,2.625rem);line-height:1.1}
h3{font-size:clamp(1.125rem,1.6vw,1.375rem);letter-spacing:-.01em;line-height:1.3}
h4{font-size:1rem;letter-spacing:0;line-height:1.4}

.lead{
  font-size:clamp(1.0625rem,1.6vw,1.25rem);
  line-height:1.7;
  color:var(--slate);
  max-width:46rem;
}
.prose{max-width:44rem;font-size:1.0625rem;line-height:1.78;color:var(--ink-deep)}
.prose p{margin:0 0 1.15em}
.prose h2,.prose h3{margin:1.8em 0 .6em}
.prose ul,.prose ol{list-style:disc;padding-left:1.3em;margin:0 0 1.15em}
.prose ol{list-style:decimal}
.prose li{margin:.3em 0}
.prose strong{font-weight:700}
.prose a{color:var(--ink-deep);font-weight:600;border-bottom:1px solid var(--red)}
.prose a:hover{background:rgba(209,58,47,.08)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--red);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;flex:0 0 auto}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.rule{height:1px;background:var(--line-soft);border:0;margin:0}

/* ---------- 4. 布局 ---------- */
.wrap{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(40px,6vw,80px)}
.stack{display:grid;gap:clamp(16px,2vw,24px);align-content:start}
.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.grid-side{grid-template-columns:minmax(0,7fr) minmax(0,4fr);align-items:start}
.surface-ink{background:var(--ink);color:var(--silver)}
.surface-ink h1,.surface-ink h2,.surface-ink h3,.surface-ink h4{color:var(--paper)}
.on-ink{color:var(--silver)}
.on-ink h1,.on-ink h2,.on-ink h3,.on-ink h4{color:var(--paper)}
.on-ink .eyebrow{color:var(--mint)}
.on-ink .lead{color:var(--silver)}

/* ---------- 5. 焦点 ---------- */
:focus-visible{outline:2px solid var(--red);outline-offset:3px;border-radius:4px}
.site-header :focus-visible,
.site-footer :focus-visible{outline-color:var(--mint)}
#main-content:focus{outline:none}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:13px 22px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-family:var(--font-display);
  font-size:.9375rem;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.2;
  text-align:center;
  cursor:pointer;
  -webkit-tap-highlight-color:transparent;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn--primary{
  background:var(--red);
  color:#FFF7F4;
  border-color:rgba(255,255,255,.14);
  box-shadow:0 10px 24px -14px rgba(209,58,47,.9);
}
.btn--primary:hover{background:var(--red-deep);transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--ink-deep);border-color:rgba(44,64,83,.35)}
.btn--ghost:hover{background:rgba(44,64,83,.07);border-color:var(--line)}
.btn--ink{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.btn--ink:hover{background:var(--ink-deep);transform:translateY(-1px)}
.btn--quiet{background:rgba(244,239,230,.08);color:var(--paper);border-color:rgba(184,196,206,.32)}
.btn--quiet:hover{background:rgba(244,239,230,.16);border-color:var(--silver)}
.btn--sm{padding:9px 16px;font-size:.8125rem}
.btn--lg{padding:16px 28px;font-size:1rem}

/* ---------- 7. 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border:1px solid rgba(44,64,83,.22);
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.1em;
  line-height:1.5;
  color:var(--slate);
  background:transparent;
  white-space:nowrap;
}
.tag--red{color:var(--red);border-color:rgba(209,58,47,.36);background:rgba(209,58,47,.07)}
.tag--mint{color:#0B5B4A;border-color:rgba(11,91,74,.28);background:rgba(57,242,200,.2)}
.tag--gold{color:#7A5B2C;border-color:rgba(201,164,106,.5);background:rgba(201,164,106,.14)}
.on-ink .tag,.surface-ink .tag{color:var(--silver);border-color:rgba(184,196,206,.3)}
.on-ink .tag--red,.surface-ink .tag--red{color:#FF9C92;border-color:rgba(209,58,47,.55);background:rgba(209,58,47,.14)}
.on-ink .tag--mint,.surface-ink .tag--mint{color:var(--mint);border-color:rgba(57,242,200,.42);background:rgba(57,242,200,.12)}
.on-ink .tag--gold,.surface-ink .tag--gold{color:var(--gold);border-color:rgba(201,164,106,.45);background:rgba(201,164,106,.12)}

.signal-dot{
  width:6px;height:6px;flex:0 0 auto;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 3px rgba(57,242,200,.14);
  animation:yh-pulse 3.2s ease-in-out infinite;
}
@keyframes yh-pulse{
  0%,100%{box-shadow:0 0 0 3px rgba(57,242,200,.14)}
  50%{box-shadow:0 0 0 6px rgba(57,242,200,.05)}
}

/* ---------- 8. 卡片 ---------- */
.card{
  position:relative;
  background:var(--paper-raised);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-card);
  padding:clamp(18px,2.4vw,28px);
  box-shadow:0 1px 0 rgba(20,32,46,.04),0 18px 34px -28px rgba(20,32,46,.55);
}
.card--ink{
  background:var(--ink);
  color:var(--silver);
  border-color:var(--line-ink);
  box-shadow:0 18px 40px -28px rgba(6,16,26,.9);
}
.card--ink h2,.card--ink h3,.card--ink h4{color:var(--paper)}
.card--flat{box-shadow:none;background:transparent}

/* ---------- 9. 面包屑 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--slate);
}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li + li::before{content:"/";color:rgba(44,64,83,.35)}
.crumbs a{color:var(--slate);border-bottom:1px solid transparent;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.crumbs a:hover{color:var(--ink-deep);border-bottom-color:var(--red)}
.crumbs [aria-current="page"]{color:var(--ink-deep);font-weight:600}

/* ---------- 10. 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid rgba(44,64,83,.2);
  border-radius:12px;
  background-color:#0F2436;
  background-image:
    repeating-linear-gradient(135deg,rgba(184,196,206,.16) 0 1px,transparent 1px 9px),
    linear-gradient(158deg,#12283B 0%,#0B1B2B 54%,#173444 100%);
}
.media-frame > img,
.media-frame > video{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:radial-gradient(120% 90% at 84% 0%,rgba(57,242,200,.16),transparent 62%);
}
.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--21x9{aspect-ratio:21 / 9}
.media-frame--paper{
  background-color:var(--paper-raised);
  background-image:
    repeating-linear-gradient(135deg,rgba(44,64,83,.1) 0 1px,transparent 1px 10px),
    linear-gradient(158deg,#FBF7F0 0%,#EFE8DC 100%);
  border-color:var(--line-soft);
}
.media-frame--paper::after{background:radial-gradient(120% 90% at 84% 0%,rgba(29,127,140,.14),transparent 62%)}

/* ---------- 11. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  left:var(--gutter);
  top:-100px;
  z-index:400;
  padding:12px 22px;
  border-radius:0 0 16px 16px;
  background:var(--mint);
  color:#062A22;
  font-family:var(--font-display);
  font-size:.875rem;
  font-weight:700;
  letter-spacing:.04em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:0;outline:2px solid var(--red);outline-offset:2px}

/* ---------- 12. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  padding:16px var(--gutter) 0;
  pointer-events:none;
  transition:padding-top var(--dur) var(--ease),padding-bottom var(--dur) var(--ease);
}
.site-header > *{pointer-events:auto}
.site-header[data-condensed="true"]{padding-top:8px}

.scroll-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  z-index:300;
  pointer-events:none;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--mint) 0%,var(--teal) 46%,var(--red) 100%);
  transition:transform .08s linear;
}

.header-shell{width:100%;max-width:var(--shell);margin-inline:auto}

.nav-pill{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(8px,1.6vw,22px);
  padding:9px 9px 9px 16px;
  background:rgba(11,27,43,.95);
  border:1px solid rgba(140,164,184,.22);
  border-radius:var(--radius-pill);
  box-shadow:0 14px 34px -18px rgba(6,16,26,.72),inset 0 1px 0 rgba(244,239,230,.06);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:padding var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header[data-condensed="true"] .nav-pill{
  padding:7px 7px 7px 14px;
  box-shadow:0 10px 24px -18px rgba(6,16,26,.85);
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  min-width:0;
  text-decoration:none;
}
.brand-mark{
  display:grid;
  place-items:center;
  width:34px;height:34px;
  flex:0 0 auto;
  border-radius:10px;
  background:var(--red);
  color:#FFF7F4;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  box-shadow:inset 0 0 0 1px rgba(244,239,230,.2);
}
.brand-text{display:flex;flex-direction:column;min-width:0;line-height:1.1}
.brand-name{
  font-family:var(--font-display);
  font-size:15px;
  font-weight:800;
  letter-spacing:.02em;
  color:var(--paper);
}
.brand-tagline{
  margin-top:3px;
  font-size:10px;
  letter-spacing:.14em;
  color:var(--silver-dim);
  white-space:nowrap;
  overflow:hidden;
  max-height:14px;
  transition:opacity var(--dur) var(--ease),max-height var(--dur) var(--ease),margin var(--dur) var(--ease);
}
.site-header[data-condensed="true"] .brand-tagline{
  opacity:0;
  max-height:0;
  margin-top:0;
}

.primary-nav{
  margin-inline:auto;
  min-width:0;
  counter-reset:nav;
}
.nav-list{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.nav-list > li{counter-increment:nav}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:8px 12px;
  border-radius:var(--radius-pill);
  color:var(--silver);
  font-family:var(--font-display);
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.4;
  white-space:nowrap;
  text-decoration:none;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(244,239,230,.07)}
.nav-link[aria-current="page"]{color:var(--paper);background:rgba(57,242,200,.1)}
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:2px;
  width:4px;height:4px;
  margin-left:-2px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 3px rgba(57,242,200,.16);
}

.header-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.nav-cta{display:none}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:9px 14px;
  border-radius:var(--radius-pill);
  background:rgba(244,239,230,.08);
  border:1px solid rgba(184,196,206,.3);
  color:var(--paper);
  font-family:var(--font-display);
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-toggle:hover{background:rgba(244,239,230,.16);border-color:var(--silver)}
.nav-toggle-bars{position:relative;display:block;width:16px;height:9px}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;right:0;
  height:1.5px;
  background:currentColor;
  transition:transform var(--dur) var(--ease),top var(--dur) var(--ease);
}
.nav-toggle-bars::before{top:0}
.nav-toggle-bars::after{top:7.5px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{top:3.75px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:3.75px;transform:rotate(-45deg)}

/* ---------- 13. 移动导航 ---------- */
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .header-actions .btn--sm{display:none}

  .primary-nav{
    position:absolute;
    top:calc(100% + 10px);
    left:0;
    right:0;
    z-index:5;
    display:none;
    margin:0;
    padding:10px;
    background:rgba(11,27,43,.985);
    border:1px solid rgba(140,164,184,.26);
    border-radius:22px;
    box-shadow:0 26px 52px -20px rgba(6,16,26,.7);
    max-height:calc(100vh - 130px);
    overflow-y:auto;
    -webkit-overflow-scrolling:touch;
  }
  .site-header[data-open="true"] .primary-nav{display:block;animation:yh-nav-in .2s var(--ease) both}
  @keyframes yh-nav-in{
    from{opacity:0;transform:translateY(-6px)}
    to{opacity:1;transform:translateY(0)}
  }

  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-list > li{width:100%}
  .nav-link{
    display:flex;
    justify-content:flex-start;
    gap:12px;
    width:100%;
    padding:13px 14px;
    border-radius:14px;
    font-size:15px;
    letter-spacing:.04em;
  }
  .nav-link::before{
    content:counter(nav,decimal-leading-zero);
    flex:0 0 auto;
    min-width:22px;
    font-family:var(--font-mono);
    font-size:11px;
    font-weight:600;
    letter-spacing:.08em;
    color:var(--gold);
  }
  .nav-link:hover{background:rgba(244,239,230,.06)}
  .nav-link[aria-current="page"]{background:rgba(57,242,200,.1)}
  .nav-link[aria-current="page"]::after{
    left:auto;
    right:16px;
    top:50%;
    bottom:auto;
    margin-left:0;
    margin-top:-2px;
  }
  .nav-cta{display:inline-flex;width:100%;margin-top:8px;justify-content:center}
}

@media (max-width:720px){
  .brand-tagline{display:none}
}

@media (max-width:560px){
  .nav-pill{padding:8px 8px 8px 12px}
  .site-header[data-condensed="true"] .nav-pill{padding:6px 6px 6px 10px}
  .brand-mark{width:30px;height:30px;border-radius:9px;font-size:11px}
  .brand-name{font-size:14px}
  .nav-toggle{padding:8px 12px;font-size:11px}
}

/* ---------- 14. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background:var(--ink);
  color:var(--silver);
  border-top:1px solid rgba(140,164,184,.2);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(57,242,200,.45),transparent);
  opacity:.7;
}
.footer-inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(40px,6vw,72px) var(--gutter) clamp(28px,4vw,44px);
  display:grid;
  gap:clamp(28px,4vw,56px);
  grid-template-columns:minmax(220px,1fr) minmax(0,1.7fr) minmax(260px,1.15fr);
  align-items:start;
}
.footer-brand{min-width:0}
.footer-brand-line{
  margin:0;
  max-width:26ch;
  font-family:var(--font-display);
  font-size:15px;
  font-weight:700;
  line-height:1.6;
  letter-spacing:.01em;
  color:var(--paper);
}
.footer-signals{
  display:grid;
  gap:8px;
  margin:18px 0 0;
  padding:0;
  list-style:none;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--silver-dim);
}
.footer-signals li{display:flex;align-items:center;gap:9px}

.footer-columns{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:clamp(18px,2.6vw,34px);
  min-width:0;
}
.footer-col{min-width:0}
.footer-col-title{
  display:flex;
  align-items:baseline;
  gap:8px;
  margin:0 0 14px;
  padding:0;
  font-family:var(--font-display);
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  line-height:1.4;
  color:var(--paper);
}
.footer-col-num{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.1em;
  color:var(--gold);
}
.footer-links{display:grid;gap:2px;margin:0;padding:0;list-style:none}
.footer-links a{
  display:inline-block;
  padding:6px 0;
  font-size:14px;
  color:var(--silver);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-links a:hover{color:var(--paper);border-bottom-color:var(--mint)}

.footer-contact{min-width:0}
.contact-list{margin:0;padding:0;list-style:none}
.contact-row{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:4px 10px;
  padding:9px 0;
  border-top:1px solid rgba(140,164,184,.16);
}
.contact-row:first-child{border-top:0;padding-top:0}
.contact-key{
  flex:0 0 auto;
  min-width:32px;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--gold);
}
.contact-val{
  flex:1 1 auto;
  min-width:0;
  font-size:13px;
  line-height:1.6;
  color:var(--paper);
  word-break:break-all;
}
.copy-btn{
  flex:0 0 auto;
  padding:4px 10px;
  border-radius:var(--radius-pill);
  background:rgba(57,242,200,.1);
  border:1px solid rgba(57,242,200,.36);
  color:var(--mint);
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.14em;
  line-height:1.5;
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.copy-btn:hover{background:rgba(57,242,200,.22);border-color:var(--mint)}
.copy-btn[data-copied="true"]{background:var(--mint);color:#062A22;border-color:var(--mint)}
.copy-btn[data-copied="false"]{background:rgba(209,58,47,.2);color:#FF9C92;border-color:rgba(209,58,47,.55)}
.contact-note{
  margin:16px 0 0;
  font-size:12px;
  line-height:1.7;
  color:var(--silver-dim);
}

.footer-legal{border-top:1px solid rgba(140,164,184,.18)}
.footer-legal-inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:18px var(--gutter) 26px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--silver-dim);
}
.footer-copy{margin:0}
.legal-links{display:flex;flex-wrap:wrap;align-items:center;gap:6px 18px;margin:0;padding:0;list-style:none}
.legal-links li{display:flex;align-items:center}
.legal-links li + li::before{content:"";width:1px;height:10px;margin-right:18px;background:rgba(140,164,184,.32)}
.legal-links a{
  color:var(--silver);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.legal-links a:hover{color:var(--mint);border-bottom-color:var(--mint)}

@media (max-width:1080px){
  .footer-inner{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer-brand{grid-column:1 / -1}
  .footer-columns{grid-column:1 / -1}
  .footer-contact{grid-column:1 / -1}
}
@media (max-width:600px){
  .footer-inner{grid-template-columns:minmax(0,1fr)}
  .footer-columns{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-legal-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:400px){
  .footer-columns{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 15. 降级动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .signal-dot{animation:none;box-shadow:0 0 0 3px rgba(57,242,200,.14)}
  .site-header[data-open="true"] .primary-nav{animation:none}
}