/* 365国际速发 · /assets/site.css
   侧边轨道 + 玻璃品牌条 + 深海蓝页脚 + 通用正文组件 */

:root{
  --ink:#061A3A;
  --deep:#0B3D91;
  --orange:#FF6B35;
  --cyan:#00E5FF;
  --paper:#F4F7FB;
  --mist:#DCE7F7;
  --steel:#3B6FD4;
  --gray:#5B6B82;
  --green:#1FA97A;
  --amber:#F2A93B;
  --white:#FFFFFF;

  --rail-w:236px;
  --topbar-h:64px;

  --radius-lg:28px;
  --radius-md:18px;
  --radius-sm:12px;
  --pill:999px;

  --shadow-soft:0 22px 46px -30px rgba(6,26,58,.55);
  --shadow-lift:0 26px 54px -28px rgba(11,61,145,.42);

  --font-display:"PingFang SC","Noto Sans SC","Source Han Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-heading:"Inter","PingFang SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Noto Sans SC","Source Han Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --ease:cubic-bezier(.2,.72,.2,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-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}
a{color:inherit;text-decoration:none}
img,svg,canvas,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
[hidden]{display:none !important}

/* ---------- 基础排版 ---------- */
html,body{min-height:100%}
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--font-heading);font-weight:900;line-height:1.2;color:var(--ink)}
p{text-wrap:pretty}
strong{font-weight:800}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.06em}
.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;
}

a:focus-visible,button:focus-visible,[tabindex]:focus-visible{
  outline:3px solid var(--orange);
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--pill);border:1.5px solid transparent;
  font-family:var(--font-heading);font-size:14px;font-weight:900;line-height:1;letter-spacing:.01em;
  text-decoration:none;cursor:pointer;white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn--primary{background:var(--orange);color:var(--ink);box-shadow:0 14px 26px -16px rgba(255,107,53,.95)}
.btn--primary:hover{background:#FF8455;transform:translateY(-1px)}
.btn--ghost{background:transparent;border-color:rgba(11,61,145,.26);color:var(--deep)}
.btn--ghost:hover{border-color:var(--orange);color:var(--ink);background:var(--white)}
.btn--dark{background:var(--deep);color:var(--white)}
.btn--dark:hover{background:var(--ink)}
.btn--on-dark{background:var(--cyan);color:var(--ink)}
.btn--on-dark:hover{background:#5CEFFF}
.btn--sm{padding:9px 16px;font-size:12.5px;letter-spacing:.03em}

/* ---------- 品牌速度标 ---------- */
.brand-mark{
  position:relative;display:inline-block;flex:0 0 auto;
  width:34px;height:34px;border-radius:11px;overflow:hidden;
  background:linear-gradient(142deg,#0B3D91,#061A3A 74%);
  box-shadow:inset 0 0 0 1px rgba(0,229,255,.34);
}
.brand-mark span{
  position:absolute;left:7px;height:3px;border-radius:2px;
  background:var(--cyan);transform:rotate(-24deg);transform-origin:left center;
}
.brand-mark span:nth-child(1){width:19px;top:11px}
.brand-mark span:nth-child(2){width:13px;top:17px;background:var(--orange)}
.brand-mark span:nth-child(3){width:8px;top:23px;opacity:.85}

/* ---------- 头部外壳 ---------- */
.site-header{position:relative;height:var(--topbar-h);z-index:50}

.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:10px 18px;border-radius:var(--pill);
  background:var(--ink);color:var(--white);
  font-family:var(--font-heading);font-size:13px;font-weight:800;
  transform:translateY(-160%);
  transition:transform .2s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:none;outline:3px solid var(--cyan);outline-offset:2px}

.scroll-meter{
  position:fixed;top:0;left:var(--rail-w);right:0;height:3px;z-index:70;
  background:rgba(11,61,145,.08);pointer-events:none;
  transition:opacity .2s var(--ease);
}
.scroll-meter__fill{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--steel) 56%,var(--orange));
  box-shadow:0 0 12px rgba(0,229,255,.55);
}

/* ---------- 玻璃品牌条 ---------- */
.topbar{
  position:fixed;top:0;left:var(--rail-w);right:0;z-index:40;
  height:var(--topbar-h);
  display:flex;align-items:center;gap:16px;
  padding:0 clamp(16px,3vw,40px);
  background:rgba(244,247,251,.84);
  -webkit-backdrop-filter:saturate(160%) blur(16px);
  backdrop-filter:saturate(160%) blur(16px);
  border-bottom:1px solid rgba(11,61,145,.12);
}
.topbar::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,rgba(0,229,255,.85),rgba(59,111,212,.5) 34%,rgba(11,61,145,.05) 62%,rgba(255,107,53,.7));
}
.topbar__brand{display:none;align-items:center;gap:10px;min-width:0;color:var(--ink)}
.topbar__wordmark{display:flex;flex-direction:column;gap:1px;min-width:0}
.topbar__name{font-family:var(--font-heading);font-weight:900;font-size:15.5px;line-height:1.25;letter-spacing:.01em}
.topbar__tagline{font-size:10.5px;line-height:1.3;letter-spacing:.05em;color:var(--gray);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar__meta{
  display:flex;align-items:center;gap:9px;margin:0;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;color:var(--gray);
}
.topbar__meta::before{content:"";width:7px;height:7px;border-radius:2px;background:var(--orange)}
.topbar__tools{display:flex;align-items:center;gap:10px;margin-left:auto}

.index-toggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 15px;border-radius:var(--pill);
  border:1.5px solid rgba(11,61,145,.22);background:rgba(255,255,255,.7);
  color:var(--deep);font-family:var(--font-heading);font-size:12.5px;font-weight:800;letter-spacing:.04em;
  cursor:pointer;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.index-toggle:hover{border-color:var(--orange);background:var(--white);color:var(--ink)}
.index-toggle[aria-expanded="true"]{border-color:var(--steel);background:var(--mist);color:var(--ink)}
.index-toggle__icon{
  width:3px;height:3px;border-radius:1px;background:currentColor;
  box-shadow:6px 0 0 currentColor,0 6px 0 currentColor,6px 6px 0 currentColor;
  margin:0 3px 3px 0;
}
.index-toggle__text{line-height:1}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 14px;border-radius:var(--pill);
  border:1.5px solid rgba(11,61,145,.24);background:var(--white);
  color:var(--deep);font-family:var(--font-heading);font-size:12.5px;font-weight:800;letter-spacing:.05em;
  cursor:pointer;
}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle__bars span{display:block;height:2px;border-radius:2px;background:currentColor;transition:transform .26s var(--ease)}
.nav-toggle__label{line-height:1}
.site-header[data-open="true"] .nav-toggle{border-color:var(--steel);background:var(--mist)}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(3px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2){transform:translateY(-3px) rotate(-45deg)}

/* ---------- 索引面板 ---------- */
.index-panel{
  position:fixed;z-index:60;
  top:calc(var(--topbar-h) + 10px);
  right:clamp(16px,3vw,40px);
  width:min(340px,calc(100vw - 32px));
  padding:18px 18px 16px;
  border-radius:22px;
  background:var(--white);
  border:1px solid rgba(11,61,145,.14);
  box-shadow:0 30px 64px -36px rgba(6,26,58,.6);
  overflow:hidden;
}
.index-panel::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:linear-gradient(90deg,var(--cyan),var(--steel) 55%,var(--orange));
}
.index-panel__kicker{
  display:flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--gray);
  text-transform:uppercase;
}
.index-panel__kicker::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--orange)}
.index-panel__list{display:grid;gap:7px;margin-top:13px}
.index-panel__link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 14px;border-radius:13px;
  background:var(--paper);border:1px solid transparent;
  color:var(--ink);font-family:var(--font-heading);font-size:14px;font-weight:800;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.index-panel__link::after{
  content:"";width:7px;height:7px;flex:0 0 auto;
  border-top:2px solid currentColor;border-right:2px solid currentColor;
  transform:rotate(45deg);opacity:.6;
}
.index-panel__link:hover{background:var(--mist);border-color:rgba(255,107,53,.6);color:var(--deep);transform:translateX(2px)}
.index-panel__note{margin-top:12px;font-size:11.5px;line-height:1.7;color:var(--gray)}

/* ---------- 侧边轨道 ---------- */
.rail{
  position:fixed;top:0;left:0;bottom:0;z-index:50;
  width:var(--rail-w);
  display:flex;flex-direction:column;gap:18px;
  padding:24px 18px 22px;
  overflow-y:auto;overscroll-behavior:contain;
  color:#EAF2FF;
  background:
    radial-gradient(120% 70% at 0% 0%,rgba(0,229,255,.22),transparent 58%),
    linear-gradient(180deg,#061A3A 0%,#0B3D91 62%,#092A63 100%);
  border-right:1px solid rgba(0,229,255,.2);
}
.rail::after{
  content:"";position:absolute;top:0;right:0;width:2px;height:100%;
  background:linear-gradient(180deg,rgba(0,229,255,.85),rgba(0,229,255,.05) 42%,rgba(255,107,53,.7));
  opacity:.75;pointer-events:none;
}
.rail__brand{
  display:flex;align-items:center;gap:9px;flex-wrap:wrap;
  color:var(--white);
}
.rail__brand .brand-mark{box-shadow:inset 0 0 0 1px rgba(0,229,255,.5)}
.rail__brandname{font-family:var(--font-heading);font-weight:900;font-size:15px;letter-spacing:.01em;line-height:1.3}
.rail__badge{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;
  padding:2px 8px;border-radius:var(--pill);
  color:var(--cyan);border:1px solid rgba(0,229,255,.42);background:rgba(0,229,255,.09);
}
.rail__kicker{
  padding-top:15px;border-top:1px solid rgba(234,242,255,.16);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;
  color:rgba(234,242,255,.55);
}
.rail__list{display:flex;flex-direction:column;gap:2px;margin-top:-4px}
.rail__link{
  position:relative;
  display:grid;grid-template-columns:24px minmax(0,1fr);align-items:center;gap:10px;
  padding:11px 12px 11px 10px;border-radius:14px;
  color:rgba(234,242,255,.76);
  font-family:var(--font-heading);font-size:14px;font-weight:700;line-height:1.35;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.rail__link::before{
  content:"";position:absolute;left:-18px;top:50%;
  width:3px;height:24px;border-radius:0 3px 3px 0;
  background:var(--orange);
  transform:translateY(-50%) scaleY(0);transform-origin:center;
  transition:transform .22s var(--ease);
}
.rail__link:hover{background:rgba(0,229,255,.11);color:var(--white);transform:translateX(2px)}
.rail__link:hover::before{transform:translateY(-50%) scaleY(1)}
.rail__link[aria-current="page"]{background:rgba(0,229,255,.15);color:var(--white)}
.rail__link[aria-current="page"]::before{transform:translateY(-50%) scaleY(1)}
.rail__link[aria-current="page"] .rail__num{color:var(--cyan)}
.rail__num{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.06em;color:rgba(0,229,255,.58)}
.rail__label{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rail__foot{
  margin-top:auto;padding-top:16px;
  border-top:1px solid rgba(234,242,255,.14);
  font-size:11.5px;line-height:1.8;color:rgba(234,242,255,.55);
}
.rail__footlink{
  display:inline-block;margin-top:4px;
  color:var(--cyan);font-weight:700;
  border-bottom:1px solid rgba(0,229,255,.4);padding-bottom:1px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.rail__footlink:hover{color:var(--white);border-color:var(--orange)}
.rail :focus-visible{outline-color:var(--cyan)}

.nav-scrim{display:none;position:fixed;inset:0;z-index:45;background:rgba(6,26,58,.52)}

/* ---------- 正文容器与通用组件 ---------- */
.page-shell{
  width:100%;max-width:1160px;margin:0 auto;
  padding:clamp(20px,4vw,44px) clamp(18px,3.4vw,40px);
}
.prose{
  max-width:70ch;
  font-size:clamp(16px,1.05vw,17.5px);
  line-height:1.85;color:var(--ink);
}
.prose p+p{margin-top:1em}
.prose h2,.prose h3{margin:1.8em 0 .6em;letter-spacing:.01em}
.prose h2{font-size:clamp(24px,2.6vw,32px)}
.prose h3{font-size:clamp(19px,2vw,23px)}
.prose ul,.prose ol{margin:1em 0;padding-left:1.25em}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li+li{margin-top:.4em}
.prose a{color:var(--deep);border-bottom:1px solid rgba(59,111,212,.45)}
.prose a:hover{color:var(--orange);border-color:var(--orange)}

.breadcrumb{margin-bottom:clamp(16px,2.4vw,28px)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__item{display:flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.04em;color:var(--gray)}
.breadcrumb__link{color:var(--gray);font-weight:700;border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.breadcrumb__link:hover{color:var(--deep);border-color:var(--orange)}
.breadcrumb__sep{color:rgba(91,107,130,.5);font-family:var(--font-mono);font-size:11px}

.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--cards{grid-template-columns:repeat(auto-fit,minmax(238px,1fr))}

.section-head{display:flex;flex-direction:column;gap:10px;margin-bottom:clamp(18px,2.4vw,30px)}
.section-head__num{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;color:var(--orange);
}
.section-head__title{font-size:clamp(26px,3.4vw,38px);line-height:1.15;letter-spacing:.01em}
.section-head__lead{max-width:62ch;font-size:15.5px;line-height:1.8;color:var(--gray)}

.card{
  position:relative;
  padding:clamp(20px,2.4vw,30px);
  border-radius:var(--radius-lg);
  background:var(--white);
  border:1px solid rgba(11,61,145,.1);
  box-shadow:var(--shadow-soft);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(0,229,255,.7);box-shadow:var(--shadow-lift)}
.card--dark{
  background:linear-gradient(158deg,#0B3D91,#061A3A 78%);
  color:#EAF2FF;border-color:rgba(0,229,255,.26);
}
.card--soft{background:var(--mist);border-color:transparent;box-shadow:none}
.card--outline{background:transparent;box-shadow:none;border-color:rgba(11,61,145,.22)}
.card__kicker{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--steel);margin-bottom:10px}
.card--dark .card__kicker{color:var(--cyan)}
.card__title{font-size:clamp(19px,2vw,23px);line-height:1.35;font-weight:900;margin-bottom:8px}
.card__text{font-size:15px;line-height:1.8;color:var(--gray)}
.card--dark .card__text{color:rgba(234,242,255,.76)}
.card__meta{display:block;margin-top:14px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--gray)}
.card--dark .card__meta{color:rgba(234,242,255,.6)}
.card--dark h1,.card--dark h2,.card--dark h3{color:var(--white)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--pill);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:var(--deep);background:var(--mist);
}
.tag--warm{background:rgba(255,107,53,.16);color:#B33F13}
.tag--live{background:rgba(31,169,122,.14);color:#0E6C4C}

/* 图片容器（页面阶段放置 .media-frame__img） */
.media-frame{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--radius-lg);
  background:
    radial-gradient(120% 120% at 12% 8%,rgba(0,229,255,.3),transparent 55%),
    linear-gradient(152deg,#0B3D91,#061A3A 72%);
  isolation:isolate;
}
.media-frame::after{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background:repeating-linear-gradient(112deg,transparent 0 22px,rgba(0,229,255,.075) 22px 23px);
}
.media-frame__img{position:relative;z-index:1;display:block;width:100%;height:100%;object-fit:cover}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:3;
  padding:16px 18px;font-size:12px;letter-spacing:.04em;color:rgba(255,255,255,.88);
  background:linear-gradient(0deg,rgba(6,26,58,.86),transparent);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--cinema{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--flush{border-radius:0}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,110px);
  overflow:hidden;
  color:#E6EEFB;
  background:
    radial-gradient(120% 130% at 6% 0%,rgba(0,229,255,.17),transparent 56%),
    linear-gradient(168deg,#061A3A 0%,#0B3D91 56%,#092A63 100%);
}
.site-footer::after{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--cyan),rgba(59,111,212,.6) 38%,rgba(6,26,58,0) 62%,var(--orange));
}
.footer-edge{
  position:absolute;top:-70px;right:-8%;width:58%;height:230px;
  transform:skewY(-6deg);
  background:linear-gradient(90deg,rgba(0,229,255,.14),rgba(0,229,255,0) 72%);
  pointer-events:none;
}
.footer-inner{
  position:relative;z-index:1;
  width:100%;max-width:1180px;margin:0 auto;
  padding:clamp(40px,6vw,72px) clamp(18px,3.4vw,44px) clamp(22px,3vw,30px);
  display:grid;gap:clamp(28px,4vw,46px);
  grid-template-columns:minmax(0,1.1fr) minmax(0,1.5fr) minmax(0,1fr);
}
.footer-brand__link{display:inline-flex;align-items:center;gap:10px;color:var(--white)}
.footer-brand__name{font-family:var(--font-heading);font-size:16px;font-weight:900;letter-spacing:.01em}
.footer-brand__line{margin-top:16px;font-size:14.5px;font-weight:700;line-height:1.7;color:rgba(230,238,251,.88)}
.footer-brand__note{margin-top:8px;max-width:30ch;font-size:12.5px;line-height:1.8;color:rgba(230,238,251,.55)}
.footer-cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(18px,2.4vw,28px)}
.footer-col__title{
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.18em;
  color:var(--cyan);text-transform:uppercase;
}
.footer-col__title::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--orange)}
.footer-col__list{display:grid;gap:10px}
.footer-link{
  display:inline-block;position:relative;
  font-size:14px;color:rgba(230,238,251,.8);
  transition:color .2s var(--ease);
}
.footer-link::after{
  content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1.5px;
  background:var(--orange);transform:scaleX(0);transform-origin:left center;
  transition:transform .24s var(--ease);
}
.footer-link:hover{color:var(--white)}
.footer-link:hover::after{transform:scaleX(1)}
.footer-link--sm{font-size:12px;color:rgba(230,238,251,.62)}
.footer-contact__list{display:grid;gap:12px}
.footer-contact__row{
  display:grid;grid-template-columns:42px minmax(0,1fr) auto;align-items:center;gap:10px;
}
.footer-contact__key{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;color:rgba(230,238,251,.5)}
.footer-contact__value{font-size:13.5px;line-height:1.6;color:#E6EEFB;word-break:break-all}
.copy-btn{
  flex:0 0 auto;padding:4px 10px;border-radius:var(--pill);
  border:1px solid rgba(0,229,255,.45);background:rgba(0,229,255,.08);
  color:var(--cyan);font-family:var(--font-mono);font-size:10.5px;letter-spacing:.08em;
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.copy-btn:hover{background:rgba(0,229,255,.22);color:var(--white)}
.copy-btn[data-copied="true"]{border-color:rgba(31,169,122,.8);background:rgba(31,169,122,.2);color:#8DF0CD}
.footer-contact__note{margin-top:14px;font-size:12px;line-height:1.8;color:rgba(230,238,251,.5)}
.footer-legal{
  grid-column:1/-1;margin-top:clamp(8px,2vw,18px);padding-top:20px;
  border-top:1px solid rgba(230,238,251,.16);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;
  font-size:12px;color:rgba(230,238,251,.55);
}
.footer-legal__copy{font-size:12px}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:18px}
.footer-legal__icp{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;color:rgba(230,238,251,.5)}
.site-footer :focus-visible{outline-color:var(--cyan)}

/* ---------- 平板与移动 ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
}
@media (max-width:1023px){
  body{padding-left:0}
  .topbar{left:0}
  .topbar__brand{display:flex}
  .topbar__meta{display:none}
  .nav-toggle{display:inline-flex}
  .scroll-meter{left:0}
  .rail{
    width:min(84vw,320px);
    transform:translateX(-102%);
    visibility:hidden;
    box-shadow:24px 0 64px -30px rgba(6,26,58,.75);
    transition:transform .32s var(--ease),visibility .32s var(--ease);
  }
  .site-header[data-open="true"] .rail{transform:none;visibility:visible}
  .site-header[data-open="true"] .nav-scrim{display:block}
  .site-header[data-open="true"] .scroll-meter{opacity:0}
  .index-panel{left:auto}
  .grid--split{grid-template-columns:minmax(0,1fr)}
  .footer-inner{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer-brand{grid-column:1/-1}
  .footer-contact{grid-column:1/-1}
}
@media (max-width:820px){
  .grid--halves{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:720px){
  .footer-inner{grid-template-columns:minmax(0,1fr)}
  .footer-brand,.footer-contact{grid-column:auto}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:10px}
  .media-frame--wide{aspect-ratio:16/9}
  .media-frame--tall{aspect-ratio:4/5}
}
@media (max-width:420px){
  .topbar__tagline{display:none}
  .topbar__tools{gap:8px}
  .topbar__tools .btn--sm{padding:8px 12px;font-size:12px}
  .index-toggle{padding:8px 11px}
  .index-toggle__text{display:none}
  .index-toggle__icon{margin-right:0}
  .nav-toggle{padding:8px 11px}
  .nav-toggle__label{display:none}
  .footer-contact__row{grid-template-columns:38px minmax(0,1fr) auto;gap:8px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .card:hover,.btn--primary:hover,.rail__link:hover,.index-panel__link:hover{transform:none}
}