/* ==========================================================================
   365登录主页 — 共享样式 /assets/site.css
   0 Reset · 1 Tokens · 2 排版 · 3 布局 · 4 按钮与标签 · 5 面板与卡片
   6 媒体容器 · 7 页眉 · 8 页脚 · 9 通用模块 · 10 响应式 · 11 动效偏好
   ========================================================================== */

/* ---------- 0. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--c-night);
  background-image:
    linear-gradient(rgba(44,62,107,.20) 1px,transparent 1px),
    linear-gradient(90deg,rgba(44,62,107,.12) 1px,transparent 1px);
  background-size:100% 96px,96px 100%;
  color:var(--c-body);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
ul,ol,dl{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0}
table{border-collapse:collapse;width:100%}
[hidden]{display:none!important}
#main-content{display:block;outline:none}

/* ---------- 1. Tokens ---------- */
:root{
  --c-night:#0E1733;
  --c-panel:#1B2A4F;
  --c-panel-up:#213258;
  --c-line:#2C3E6B;
  --c-orange:#FF7A33;
  --c-orange-soft:#FFB37A;
  --c-cyan:#2FD6C4;
  --c-violet:#6C7BFF;
  --c-paper:#F5F1E8;
  --c-body:#C7CEE0;
  --c-ink:#0A0F1E;

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

  --wrap:1240px;
  --gutter:clamp(18px,4vw,56px);
  --cut:18px;
  --cut-sm:10px;
  --ease:cubic-bezier(.2,.5,.3,1);
}

/* ---------- 2. 排版 ---------- */
.display-1{
  font-size:clamp(2.6rem,6.6vw,5.6rem);
  font-weight:300;
  line-height:1.02;
  letter-spacing:.02em;
  color:var(--c-paper);
}
.display-2{
  font-size:clamp(1.9rem,3.6vw,2.9rem);
  font-weight:500;
  line-height:1.16;
  letter-spacing:.02em;
  color:var(--c-paper);
}
.section-title{
  font-size:clamp(1.75rem,2.6vw,2.25rem);
  font-weight:600;
  line-height:1.24;
  letter-spacing:.015em;
  color:var(--c-paper);
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--c-cyan);
}
.index-num{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--c-orange);
}
.lede{
  font-size:clamp(1.02rem,1.35vw,1.18rem);
  line-height:1.8;
  color:var(--c-body);
  max-width:62ch;
}
.mono{font-family:var(--font-mono);letter-spacing:.02em}
.num{font-family:var(--font-mono);color:var(--c-orange)}
strong{color:var(--c-paper);font-weight:600}

/* ---------- 3. 布局 ---------- */
.wrap{width:min(100% - (var(--gutter) * 2),var(--wrap));margin-inline:auto}
.section{padding:clamp(44px,7vw,96px) 0}
.section--tight{padding:clamp(26px,4vw,56px) 0}
.section--panel{
  background-color:rgba(27,42,79,.42);
  border-top:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
}
.section--paper{background-color:var(--c-paper);color:var(--c-ink)}
.section--paper .section-title,
.section--paper h2,
.section--paper h3,
.section--paper strong,
.section--paper .display-2{color:var(--c-ink)}
.section--paper .lede,
.section--paper p{color:#3A4256}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  padding-bottom:18px;
  border-bottom:1px solid var(--c-line);
  margin-bottom:clamp(20px,3vw,36px);
}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.2vw,28px)}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}
.stack-2{display:flex;flex-direction:column;gap:clamp(14px,2vw,24px)}
.stack-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.breath{min-height:clamp(28px,6vw,96px)}

/* ---------- 4. 按钮与标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55em;
  padding:12px 22px;
  font-size:15px;
  font-weight:600;
  letter-spacing:.03em;
  line-height:1.2;
  border:1px solid transparent;
  background:transparent;
  color:var(--c-paper);
  clip-path:polygon(0 0,calc(100% - var(--cut-sm)) 0,100% var(--cut-sm),100% 100%,0 100%);
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn--accent{background-color:var(--c-orange);color:var(--c-ink)}
.btn--accent:hover{background-color:var(--c-orange-soft)}
.btn--ghost{background-color:rgba(27,42,79,.62);border-color:var(--c-line);color:var(--c-paper)}
.btn--ghost:hover{border-color:var(--c-orange);color:var(--c-orange-soft)}
.btn--paper{background-color:var(--c-paper);color:var(--c-ink);border-color:rgba(10,15,30,.18)}
.btn--paper:hover{background-color:#fff}
.btn--sm{padding:8px 15px;font-size:13px;letter-spacing:.04em}
.btn:hover{transform:translateY(-1px)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:4px 10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--c-body);
  background-color:rgba(27,42,79,.6);
  border:1px solid var(--c-line);
}
.tag--accent{color:var(--c-orange);border-color:rgba(255,122,51,.45)}
.tag--cyan{color:var(--c-cyan);border-color:rgba(47,214,196,.42)}
.tag--violet{color:var(--c-violet);border-color:rgba(108,123,255,.45)}
.tag-list{display:flex;flex-wrap:wrap;gap:8px}

.chip{
  padding:7px 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--c-body);
  background-color:rgba(27,42,79,.5);
  border:1px solid var(--c-line);
  transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.chip:hover{border-color:var(--c-orange-soft);color:var(--c-paper)}
.chip[aria-pressed="true"]{background-color:rgba(255,122,51,.14);border-color:var(--c-orange);color:var(--c-orange)}

.segment{display:inline-flex;flex-wrap:wrap;border:1px solid var(--c-line);background-color:rgba(27,42,79,.5)}
.segment__btn{
  padding:9px 18px;
  font-size:14px;
  letter-spacing:.04em;
  color:var(--c-body);
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.segment__btn:hover{color:var(--c-paper)}
.segment__btn[aria-selected="true"]{background-color:var(--c-orange);color:var(--c-ink);font-weight:600}

/* ---------- 5. 面板与卡片 ---------- */
.cut{clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)))}
.cut--tr{clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,0 100%)}
.cut--bl{clip-path:polygon(0 0,100% 0,100% 100%,22px 100%,0 calc(100% - 22px))}

.panel{
  background-color:var(--c-panel);
  border:1px solid var(--c-line);
  padding:clamp(18px,2.4vw,32px);
}
.panel--soft{background-color:rgba(27,42,79,.45)}

.card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:10px;
  background-color:var(--c-panel);
  border:1px solid var(--c-line);
  padding:clamp(18px,2.2vw,28px);
  clip-path:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,0 100%);
  transition:transform .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.card::after{
  content:"";
  position:absolute;
  left:0;top:0;
  width:100%;height:2px;
  background-color:var(--c-orange);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s var(--ease);
}
.card:hover,.card:focus-within{transform:translateY(-2px);background-color:var(--c-panel-up);border-color:var(--c-orange)}
.card:hover::after,.card:focus-within::after{transform:scaleX(1)}
.card.is-open{border-color:var(--c-cyan)}
.card__meta{
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--c-cyan);
}
.card__title{font-size:1.15rem;font-weight:600;line-height:1.45;color:var(--c-paper)}
.card__summary{font-size:15.5px;line-height:1.8;color:var(--c-body)}
.card__toggle{
  align-self:flex-start;
  display:inline-flex;align-items:center;gap:.5em;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:var(--c-orange-soft);
  border-bottom:1px solid rgba(255,179,122,.5);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.card__toggle:hover{color:var(--c-orange);border-color:var(--c-orange)}
.card__dot{width:7px;height:7px;background-color:var(--c-line);display:inline-block}
.card.is-open .card__dot{background-color:var(--c-cyan)}

/* ---------- 6. 媒体容器（页面阶段放图片占位） ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  background-color:var(--c-panel);
  border:1px solid var(--c-line);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
}
.media-frame > img,.media-frame > svg{width:100%;height:100%;object-fit:cover;filter:saturate(.72) contrast(1.04)}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--photo{aspect-ratio:3/2}
.media-frame--portrait{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--veil::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,23,51,.12),rgba(14,23,51,.74));
  pointer-events:none;
}
.media-frame__tag{
  position:absolute;top:0;left:0;
  padding:6px 12px;
  background-color:var(--c-orange);
  color:var(--c-ink);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 14px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--c-cyan);
  background:linear-gradient(180deg,rgba(14,23,51,0),rgba(14,23,51,.86));
}

/* ---------- 7. 页眉 ---------- */
.skip-link{
  position:absolute;left:14px;top:-70px;z-index:200;
  padding:10px 18px;
  background-color:var(--c-orange);
  color:var(--c-ink);
  font-size:14px;font-weight:700;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:top .15s var(--ease);
}
.skip-link:focus{top:14px}

.site-header{position:relative;z-index:80;background-color:var(--c-night);border-bottom:1px solid var(--c-line)}
.site-header__top{background-color:var(--c-night)}
.site-header__top::after{content:"";display:block;height:1px;background-color:rgba(44,62,107,.5)}

.top-band{
  display:grid;
  grid-template-columns:minmax(0,auto) minmax(0,1fr) minmax(0,auto);
  align-items:center;
  gap:clamp(14px,2.4vw,40px);
  padding:15px 0;
}
.brand{display:inline-flex;align-items:center;gap:14px;min-width:0}
.brand__mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:52px;height:52px;flex:0 0 auto;
  background-color:var(--c-orange);
  color:var(--c-ink);
  font-family:var(--font-mono);font-size:16px;font-weight:700;letter-spacing:.02em;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{font-size:1.05rem;font-weight:600;letter-spacing:.06em;color:var(--c-paper);line-height:1.35}
.brand__tag{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--c-violet);line-height:1.5}
.brand:hover .brand__name{color:var(--c-orange-soft)}

.status-strip{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  min-width:0;
  padding:7px 16px 7px 14px;
  background-color:rgba(27,42,79,.72);
  border:1px solid var(--c-line);
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--c-body);
}
.status-strip__dot{
  width:8px;height:8px;flex:0 0 auto;border-radius:50%;
  background-color:var(--c-cyan);
  box-shadow:0 0 0 4px rgba(47,214,196,.16);
  animation:pulse-dot 3.6s ease-in-out infinite;
}
.status-strip__label{color:var(--c-paper)}
.status-strip__meta{color:var(--c-cyan);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@keyframes pulse-dot{0%,100%{opacity:1;box-shadow:0 0 0 4px rgba(47,214,196,.16)}50%{opacity:.55;box-shadow:0 0 0 8px rgba(47,214,196,.06)}}

.top-band__tools{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
.tool-link{
  position:relative;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:var(--c-body);
  padding-bottom:3px;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.tool-link:hover{color:var(--c-orange-soft);border-color:var(--c-orange-soft)}

.main-band{
  position:sticky;top:0;z-index:80;
  background-color:rgba(20,32,62,.94);
  border-bottom:1px solid var(--c-line);
  backdrop-filter:blur(10px);
}
.scroll-progress{
  position:absolute;left:0;top:0;
  width:100%;height:2px;
  background-color:var(--c-orange);
  transform:scaleX(0);
  transform-origin:left center;
  will-change:transform;
}
.main-band__inner{display:flex;align-items:center;gap:clamp(14px,3vw,44px);min-height:64px}
.site-nav{flex:1 1 auto;min-width:0}
.site-nav__list{display:flex;align-items:center;gap:clamp(4px,1.4vw,26px);counter-reset:navidx}
.site-nav__item{position:relative}
.site-nav__link{
  position:relative;
  display:inline-flex;align-items:baseline;gap:.5em;
  padding:20px 2px;
  font-size:15.5px;font-weight:500;letter-spacing:.02em;
  color:var(--c-body);
  transition:color .18s var(--ease);
}
.site-nav__link::before{
  counter-increment:navidx;
  content:counter(navidx,decimal-leading-zero);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--c-line);
  transition:color .18s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;left:0;right:0;bottom:12px;height:2px;
  background-color:var(--c-orange);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s var(--ease);
}
.site-nav__link:hover{color:var(--c-paper)}
.site-nav__link:hover::before{color:var(--c-cyan)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--c-paper)}
.site-nav__link[aria-current="page"]::before{color:var(--c-orange)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background-color:var(--c-orange-soft)}

.header-cta{flex:0 0 auto}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 14px;
  background-color:rgba(27,42,79,.72);
  border:1px solid var(--c-line);
  color:var(--c-paper);
  font-size:14px;font-weight:600;letter-spacing:.04em;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:2px;background-color:currentColor;transition:transform .18s var(--ease),opacity .18s var(--ease)}
.nav-toggle:hover{border-color:var(--c-orange-soft)}
.nav-toggle[aria-expanded="true"]{border-color:var(--c-orange);color:var(--c-orange-soft)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  margin-top:clamp(56px,9vw,120px);
  background-color:var(--c-night);
  background-image:linear-gradient(180deg,rgba(27,42,79,.62) 0%,rgba(14,23,51,0) 62%);
  border-top:1px solid var(--c-line);
  padding:clamp(40px,6vw,76px) 0 28px;
}
.site-footer__inner{display:block}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.25fr;
  gap:clamp(24px,3.2vw,52px);
  padding-bottom:clamp(28px,4vw,48px);
  border-bottom:1px solid var(--c-line);
}
.footer-col{min-width:0}
.footer-col--brand{display:flex;flex-direction:column;gap:14px}
.footer-brand{display:inline-flex;align-items:center;gap:12px}
.footer-brand__mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;flex:0 0 auto;
  background-color:var(--c-orange);
  color:var(--c-ink);
  font-family:var(--font-mono);font-size:14px;font-weight:700;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
}
.footer-brand__name{font-size:1.05rem;font-weight:600;letter-spacing:.06em;color:var(--c-paper)}
.footer-brand__note{font-size:15px;line-height:1.8;color:var(--c-body);max-width:38ch}
.footer-brand__meta{font-size:12px;letter-spacing:.14em;color:var(--c-cyan)}
.footer-col__title{
  margin-bottom:16px;
  padding-bottom:10px;
  border-bottom:1px solid var(--c-line);
  font-size:13px;font-weight:600;letter-spacing:.16em;
  color:var(--c-paper);
}
.footer-list{display:flex;flex-direction:column;gap:11px}
.footer-list__link{
  display:inline-block;
  font-size:15px;
  color:var(--c-body);
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease);
}
.footer-list__link:hover{color:var(--c-orange-soft);border-color:var(--c-orange-soft);transform:translateX(2px)}
.footer-contact{display:flex;flex-direction:column;gap:10px;margin-top:14px}
.footer-contact__row{display:grid;grid-template-columns:72px minmax(0,1fr);gap:10px;font-size:14px;line-height:1.7}
.footer-contact__key{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--c-violet);padding-top:3px}
.footer-contact__val{color:var(--c-body);word-break:break-word}
.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-top:22px;
}
.footer-legal__line{font-size:13px;letter-spacing:.04em;color:#8E9AB8}
.footer-legal__icp{color:var(--c-orange-soft)}

/* ---------- 9. 通用模块 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:#8E9AB8;
  padding:18px 0 0;
}
.breadcrumb a{color:var(--c-body);transition:color .16s var(--ease)}
.breadcrumb a:hover{color:var(--c-orange-soft)}
.breadcrumb__sep{color:var(--c-line)}

.status-band{
  border-top:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
  background-color:rgba(27,42,79,.38);
  overflow:hidden;
  padding:12px 0;
}
.status-band__track{
  display:flex;
  gap:clamp(28px,4vw,64px);
  width:max-content;
  animation:slow-drift 34s linear infinite;
}
.status-band__item{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  color:var(--c-body);white-space:nowrap;
}
.status-band__item strong{color:var(--c-orange);font-weight:500}
@keyframes slow-drift{from{transform:translateX(0)}to{transform:translateX(-50%)}}

.index-link{
  display:flex;align-items:baseline;gap:12px;
  padding:8px 0;
  font-size:14px;color:#8E9AB8;
  border-left:2px solid transparent;
  padding-left:10px;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.index-link:hover{color:var(--c-paper);border-color:var(--c-line)}
.index-link.is-active{color:var(--c-orange);border-color:var(--c-orange)}
.index-link .mono{font-size:11px;letter-spacing:.14em;color:var(--c-cyan)}
.index-link.is-active .mono{color:var(--c-orange)}

.data-row{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:12px;
  align-items:baseline;
  padding:12px 0;
  border-bottom:1px dashed rgba(44,62,107,.85);
}
.data-row__label{font-size:15px;color:var(--c-body)}
.data-row__value{font-family:var(--font-mono);font-size:15px;color:var(--c-orange-soft)}

.rule{height:1px;background-color:var(--c-line);border:0;margin:0}
.rule--slash{
  height:1px;border:0;margin:0;
  background:linear-gradient(90deg,var(--c-orange) 0%,var(--c-line) 32%,transparent 100%);
}

.reveal{opacity:0;transform:translateY(10px);transition:opacity .12s ease-out,transform .12s ease-out}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 10. 响应式 ---------- */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;row-gap:32px}
  .footer-col--brand{grid-column:span 3}
}
@media (max-width:980px){
  .top-band{grid-template-columns:minmax(0,1fr) auto;row-gap:12px;padding:14px 0}
  .status-strip{grid-column:1 / -1;order:3}
  .top-band__tools{justify-content:flex-end}
  .nav-toggle{display:inline-flex}
  .main-band__inner{min-height:60px;gap:12px}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;
    display:none;
    padding:6px var(--gutter) 18px;
    background-color:var(--c-panel);
    border-bottom:1px solid var(--c-line);
    max-height:calc(100vh - 110px);
    overflow-y:auto;
  }
  .site-nav[data-open]{display:block;animation:nav-drop .18s var(--ease) both}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__link{display:flex;width:100%;padding:14px 0;font-size:16px;border-bottom:1px solid rgba(44,62,107,.7)}
  .site-nav__link::after{left:0;right:auto;width:22px;bottom:6px}
  .site-nav__link[aria-current="page"]{color:var(--c-orange-soft)}
  @keyframes nav-drop{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-4,.col-5,.col-6,.col-7,.col-8,.col-9{grid-column:span 6}
  .col-4.keep,.col-5.keep,.col-6.keep{grid-column:span 3}
}
@media (max-width:720px){
  body{font-size:16.5px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:30px}
  .footer-col--brand{grid-column:span 2}
  .footer-contact__row{grid-template-columns:minmax(0,1fr);gap:2px}
  .footer-contact__key{padding-top:0}
  .footer-legal{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .brand__tag{display:none}
  .brand__mark{width:42px;height:42px;font-size:14px}
  .status-strip__meta{white-space:normal}
  .grid-12{grid-template-columns:minmax(0,1fr)}
  .col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-12{grid-column:span 1}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-col--brand{grid-column:span 1}
  .header-cta{display:none}
}

/* ---------- 11. 焦点与动效偏好 ---------- */
:focus-visible{
  outline:2px solid var(--c-orange);
  outline-offset:2px;
  box-shadow:0 0 0 1px var(--c-ink);
}
.section--paper :focus-visible,.btn--accent:focus-visible{box-shadow:0 0 0 1px rgba(10,15,30,.85)}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .status-band__track{animation:none!important;transform:none!important}
  .status-strip__dot{animation:none!important}
  .reveal{opacity:1!important;transform:none!important}
  .card:hover,.card:focus-within{transform:none}
  .btn:hover{transform:none}
}