*,*::before,*::after{box-sizing:border-box}

:root{
  --ink:#0B1F33;
  --ink-2:#13314D;
  --ink-deep:#1A2430;
  --amber:#F2A03D;
  --amber-soft:#FFD9A0;
  --coral:#FF6F5E;
  --celadon:#7FBFB2;
  --paper:#F4F1EA;
  --white:#FFFFFF;
  --slate:#5B6B7A;

  --font-display:"Sora","Montserrat","Noto Sans SC","PingFang SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;

  --radius-lg:28px;
  --radius-md:18px;
  --radius-sm:10px;
  --radius-pill:999px;

  --shell:1240px;
  --gutter:clamp(18px,4vw,40px);
  --header-h:64px;

  --line:rgba(11,31,51,.12);
  --line-dark:rgba(244,241,234,.16);
  --shadow-soft:0 18px 40px -30px rgba(11,31,51,.55);
  --ease:cubic-bezier(.22,.68,.31,1);
}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  background-color:var(--paper);
}

body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  color:var(--ink-deep);
  background-color:var(--paper);
  background-image:radial-gradient(rgba(11,31,51,.05) 1px,transparent 1px);
  background-size:24px 24px;
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

main{display:block}
[id]{scroll-margin-top:calc(var(--header-h) + 18px)}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.01em;
  color:var(--ink);
  margin:0 0 .6em;
}

p{margin:0 0 1em}
p:last-child{margin-bottom:0}

a{color:inherit}
ul,ol{margin:0 0 1em;padding-left:1.2em}
li{margin:.25em 0}

img,svg,video{max-width:100%;height:auto;display:block}

button{font:inherit;color:inherit}

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

::selection{background:var(--amber-soft);color:var(--ink)}

/* ---------- 容器与章节 ---------- */
.container{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(64px,9vw,128px)}
.section--tight{padding-block:clamp(40px,6vw,72px)}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:clamp(16px,3vw,40px);
  margin-bottom:clamp(28px,4vw,48px);
}

.section-head-main{display:flex;flex-direction:column;gap:10px;min-width:0}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--slate);
}
.eyebrow::before{
  content:"";
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--amber);
}

.section-num{
  display:block;
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(2.6rem,6vw,4.4rem);
  line-height:.9;
  letter-spacing:-.03em;
  color:rgba(11,31,51,.10);
  -webkit-text-stroke:1.4px rgba(11,31,51,.28);
  margin:0;
}

.section-title{
  font-family:var(--font-display);
  font-size:clamp(1.6rem,2.6vw,2.4rem);
  font-weight:800;
  line-height:1.15;
  margin:0;
  color:var(--ink);
}

.section-lead{
  max-width:56ch;
  margin:0;
  color:var(--slate);
  font-size:16.5px;
  line-height:1.75;
}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.2vw,28px)}
.grid-12{display:grid;grid-template-columns:1fr;gap:clamp(16px,2.2vw,28px)}

@media (min-width:900px){
  .grid-12{grid-template-columns:repeat(12,minmax(0,1fr))}
  .col-3{grid-column:span 3}
  .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}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:14.5px;
  font-weight:600;
  line-height:1.3;
  letter-spacing:.01em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}

.btn-primary{
  background:var(--amber);
  color:var(--ink);
  box-shadow:0 12px 26px -16px rgba(242,160,61,.95);
}
.btn-primary:hover{background:#FFB254}

.btn-ghost{
  background:rgba(244,241,234,.06);
  color:var(--paper);
  border-color:rgba(244,241,234,.26);
}
.btn-ghost:hover{background:rgba(244,241,234,.16);border-color:rgba(244,241,234,.42)}

.btn-quiet{
  background:var(--white);
  color:var(--ink);
  border-color:var(--line);
}
.btn-quiet:hover{background:#FFFAF1;border-color:rgba(242,160,61,.6)}

.btn-sm{padding:8px 15px;font-size:13px}
.btn-block{width:100%}

/* ---------- 标签 / 状态 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  background:rgba(11,31,51,.06);
  color:var(--ink-2);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.04em;
  line-height:1.6;
  white-space:nowrap;
}
.tag--amber{background:rgba(242,160,61,.16);color:#8C5205;border-color:rgba(242,160,61,.34)}
.tag--celadon{background:rgba(127,191,178,.2);color:#2F6A5E;border-color:rgba(127,191,178,.42)}
.tag--coral{background:rgba(255,111,94,.16);color:#A83A2D;border-color:rgba(255,111,94,.36)}

/* ---------- 卡片 / 面板 ---------- */
.card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:clamp(20px,2.4vw,30px);
  box-shadow:var(--shadow-soft);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:0 26px 48px -34px rgba(11,31,51,.7)}

.card--dark{
  background:linear-gradient(158deg,var(--ink-2) 0%,var(--ink) 78%);
  border-color:rgba(244,241,234,.12);
  color:rgba(244,241,234,.78);
}
.card--dark h2,.card--dark h3,.card--dark .stat-value{color:var(--white)}

.card--amber{
  background:linear-gradient(150deg,var(--amber-soft) 0%,var(--amber) 100%);
  border-color:transparent;
  color:var(--ink);
}

.panel{
  background:linear-gradient(155deg,var(--ink-2) 0%,var(--ink) 72%);
  border:1px solid rgba(244,241,234,.12);
  border-radius:var(--radius-lg);
  padding:clamp(22px,3vw,36px);
  color:rgba(244,241,234,.8);
}
.panel h2,.panel h3,.panel .stat-value{color:var(--white)}

.stat{display:flex;flex-direction:column;gap:2px}
.stat-value{
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(1.7rem,3vw,2.6rem);
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--ink);
}
.stat-label{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--slate);
}
.card--dark .stat-label,.panel .stat-label{color:rgba(244,241,234,.58)}

/* ---------- 媒体容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  display:block;
  width:100%;
  aspect-ratio:16/10;
  border-radius:var(--radius-md);
  border:1px solid var(--line);
  background-color:#EDE8DD;
  background-image:
    linear-gradient(150deg,rgba(255,217,160,.45),rgba(244,241,234,0) 52%,rgba(127,191,178,.35)),
    linear-gradient(rgba(11,31,51,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(11,31,51,.07) 1px,transparent 1px);
  background-size:100% 100%,34px 34px,34px 34px;
}
.media-frame > img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin-block:clamp(20px,3vw,32px) 0}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  list-style:none;
  margin:0;
  padding:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--slate);
}
.breadcrumb-list li{margin:0;display:inline-flex;align-items:center;gap:8px}
.breadcrumb-list li + li::before{content:"/";color:rgba(11,31,51,.26)}
.breadcrumb-list a{
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.breadcrumb-list a:hover{color:var(--ink);border-bottom-color:var(--amber)}
.breadcrumb-list [aria-current="page"]{color:var(--ink);font-weight:600}

/* ---------- 正文 ---------- */
.prose{
  max-width:72ch;
  font-size:17px;
  line-height:1.8;
  color:var(--ink-deep);
}
.prose > * + *{margin-top:1.1em}
.prose h2{font-size:clamp(1.3rem,2vw,1.65rem);margin-top:1.8em;margin-bottom:.5em}
.prose h3{font-size:1.12rem;margin-top:1.6em;margin-bottom:.4em}
.prose ul,.prose ol{padding-left:1.35em}
.prose a{
  color:var(--ink-2);
  text-decoration:underline;
  text-decoration-color:var(--amber);
  text-decoration-thickness:2px;
  text-underline-offset:3px;
}
.prose a:hover{color:var(--ink);text-decoration-color:var(--coral)}
.prose blockquote{
  margin:1.6em 0;
  padding:14px 22px;
  border-left:3px solid var(--amber);
  background:rgba(255,217,160,.22);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:var(--ink-2);
}
.prose code{
  font-family:var(--font-mono);
  font-size:.9em;
  background:rgba(11,31,51,.07);
  padding:2px 6px;
  border-radius:6px;
}

/* ---------- 滚动显现 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
  will-change:opacity,transform;
}
.js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:-120px;
  left:16px;
  z-index:200;
  padding:12px 20px;
  border-radius:0 0 12px 12px;
  background:var(--amber);
  color:var(--ink);
  font-weight:700;
  font-size:14px;
  text-decoration:none;
  transition:top .22s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{top:0}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(178deg,#0B1F33 0%,#0D2439 100%);
  color:var(--paper);
  border-bottom:1px solid rgba(244,241,234,.10);
  transition:box-shadow .3s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 22px 44px -34px rgba(0,0,0,.9)}

.header-shell{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:clamp(10px,2vw,24px);
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  padding:9px 0;
  text-decoration:none;
  color:inherit;
  min-width:0;
}
.brand-mark{
  flex:none;
  font-family:var(--font-mono);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.12em;
  padding:7px 10px;
  border-radius:9px;
  background:linear-gradient(135deg,var(--amber) 0%,#E08C2C 100%);
  color:var(--ink);
  line-height:1.1;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand-name{
  font-family:var(--font-display);
  font-weight:700;
  font-size:16.5px;
  letter-spacing:.06em;
  color:var(--paper);
  white-space:nowrap;
}
.brand-tag{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.02em;
  color:rgba(244,241,234,.58);
  white-space:nowrap;
}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:42px;
  height:42px;
  padding:0;
  border-radius:12px;
  border:1px solid rgba(244,241,234,.24);
  background:rgba(244,241,234,.06);
  color:var(--paper);
  cursor:pointer;
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}
.nav-toggle:hover{background:rgba(244,241,234,.16);border-color:rgba(244,241,234,.4)}
.nav-toggle-bars{display:block;position:relative;width:18px;height:12px}
.nav-toggle-bars span{
  position:absolute;
  left:0;
  width:100%;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .3s var(--ease),opacity .2s var(--ease);
}
.nav-toggle-bars span:nth-child(1){top:0}
.nav-toggle-bars span:nth-child(2){top:5px}
.nav-toggle-bars span:nth-child(3){top:10px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) 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(-5px) rotate(-45deg)}

.cmd-nav{
  display:none;
  position:fixed;
  top:var(--header-h);
  left:0;
  right:0;
  z-index:79;
  max-height:calc(100dvh - var(--header-h));
  overflow-y:auto;
  padding:14px var(--gutter) 26px;
  background:linear-gradient(180deg,#0B1F33 0%,#0E2A44 100%);
  border-bottom:1px solid rgba(244,241,234,.14);
  box-shadow:0 34px 64px -34px rgba(0,0,0,.75);
  animation:navDrop .28s var(--ease) both;
}
.cmd-nav[data-open]{display:block}

@keyframes navDrop{
  from{opacity:0;transform:translateY(-10px)}
  to{opacity:1;transform:none}
}

.cmd-nav-list{
  display:flex;
  flex-direction:column;
  gap:0;
  list-style:none;
  margin:0;
  padding:0;
}
.cmd-link{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:flex-start;
  gap:12px;
  padding:13px 4px;
  border-bottom:1px solid rgba(244,241,234,.08);
  border-radius:0;
  font-size:16px;
  font-weight:500;
  text-decoration:none;
  color:rgba(244,241,234,.8);
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.cmd-link::before{
  content:"";
  position:absolute;
  top:50%;
  left:-8px;
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--amber);
  transform:translateY(-50%) scale(0);
  transition:transform .28s var(--ease);
}
.cmd-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  border-radius:2px;
  background:var(--amber);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s var(--ease);
}
.cmd-link:hover,.cmd-link:focus-visible{color:var(--paper);background:rgba(244,241,234,.06)}
.cmd-link[aria-current="page"]{color:var(--amber-soft);font-weight:600}
.cmd-link[aria-current="page"] .cmd-index{color:var(--amber)}
.cmd-link[aria-current="page"]::before{transform:translateY(-50%) scale(1)}
.cmd-link[aria-current="page"]::after{transform:scaleX(1)}

.cmd-index{
  flex:none;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  color:rgba(244,241,234,.34);
  transition:color .2s var(--ease);
}
.cmd-label{white-space:nowrap}

.cmd-nav-foot{margin-top:18px}
.cmd-nav-foot .btn{justify-content:center}

.header-actions{
  display:flex;
  align-items:center;
  gap:8px;
  grid-column:3;
  justify-self:end;
}

.status-pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(127,191,178,.42);
  background:rgba(127,191,178,.08);
  color:var(--celadon);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  white-space:nowrap;
}
.status-dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--celadon);
  animation:pulse 3s ease-in-out infinite;
}

@keyframes pulse{
  0%,100%{box-shadow:0 0 0 3px rgba(127,191,178,.18)}
  50%{box-shadow:0 0 0 5px rgba(127,191,178,.07)}
}

.scroll-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  display:block;
  width:100%;
  height:3px;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--amber) 0%,var(--coral) 100%);
  pointer-events:none;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(72px,10vw,132px);
  background:linear-gradient(180deg,#0B1F33 0%,#0A1B2C 100%);
  color:rgba(244,241,234,.74);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--amber) 45%,transparent);
  opacity:.55;
}
.site-footer::after{
  content:"";
  position:absolute;
  top:-160px;
  right:-120px;
  width:420px;
  height:420px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(242,160,61,.16),transparent 68%);
  pointer-events:none;
}

.footer-shell{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(48px,7vw,84px) var(--gutter) 28px;
}

.footer-top{
  display:grid;
  grid-template-columns:minmax(200px,.9fr) minmax(0,2fr);
  gap:clamp(28px,5vw,64px);
  padding-bottom:clamp(30px,4vw,48px);
  border-bottom:1px solid var(--line-dark);
}

.footer-brand{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.footer-mark{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.12em;
  padding:7px 10px;
  border-radius:9px;
  background:linear-gradient(135deg,var(--amber) 0%,#E08C2C 100%);
  color:var(--ink);
  text-decoration:none;
  line-height:1.1;
}
.footer-name{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--white);
  margin:0;
}
.footer-line{
  margin:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.05em;
  line-height:1.9;
  color:rgba(244,241,234,.52);
  max-width:28ch;
}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}
.footer-col{min-width:0}
.footer-col-title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--amber);
}
.footer-links{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:9px;
}
.footer-links li{margin:0}
.footer-links a{
  display:inline-block;
  font-size:14.5px;
  color:rgba(244,241,234,.74);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.footer-links a:hover{
  color:var(--white);
  border-bottom-color:var(--amber);
  transform:translateY(-1px);
}

.footer-contact{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(196px,1fr));
  gap:18px clamp(24px,4vw,48px);
  padding-block:clamp(26px,3.6vw,40px);
  border-bottom:1px solid var(--line-dark);
}
.footer-contact-item{display:flex;flex-direction:column;gap:5px;min-width:0}
.footer-label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--amber);
  opacity:.85;
}
.footer-value{
  font-family:var(--font-mono);
  font-size:13.5px;
  letter-spacing:.01em;
  line-height:1.7;
  color:rgba(244,241,234,.88);
  word-break:break-word;
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 26px;
  padding-top:22px;
}
.footer-note{
  flex:1 1 320px;
  margin:0;
  font-size:12.5px;
  line-height:1.75;
  color:rgba(244,241,234,.45);
}
.footer-legal,.footer-copy{
  margin:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.05em;
  color:rgba(244,241,234,.55);
  white-space:nowrap;
}

/* ---------- 桌面导航 ---------- */
@media (min-width:961px){
  .site-header{--header-h:70px}
  .cmd-nav,
  .cmd-nav[data-open]{
    display:block;
    position:static;
    max-height:none;
    overflow:visible;
    padding:0;
    background:none;
    border:0;
    box-shadow:none;
    animation:none;
    grid-column:2;
    justify-self:center;
  }
  .cmd-nav-list{
    flex-direction:row;
    align-items:center;
    gap:2px;
  }
  .cmd-link{
    padding:9px 13px;
    border-bottom:0;
    border-radius:var(--radius-pill);
    font-size:14.5px;
    gap:7px;
    transition:color .2s var(--ease),background-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .cmd-link::before{left:5px}
  .cmd-link::after{
    left:13px;
    right:13px;
    bottom:4px;
    height:2px;
  }
  .cmd-link[aria-current="page"]{
    color:var(--paper);
    background:rgba(242,160,61,.14);
    box-shadow:inset 0 0 0 1px rgba(242,160,61,.34);
  }
  .cmd-nav-foot{display:none}
}

@media (max-width:1180px){
  .header-extra{display:none}
}

/* ---------- 移动端 ---------- */
@media (max-width:960px){
  .site-header{--header-h:62px}
  .header-shell{
    grid-template-columns:1fr auto auto;
    gap:10px;
    min-height:var(--header-h);
  }
  .brand{grid-column:1;grid-row:1}
  .header-actions{grid-column:2;grid-row:1;gap:6px}
  .nav-toggle{display:inline-flex;grid-column:3;grid-row:1}
  .status-pill{display:none}
  .header-extra{display:none}
  .brand-name{font-size:15.5px}
  .brand-tag{display:none}
}

@media (max-width:420px){
  .brand-mark{font-size:11px;padding:6px 8px}
  .brand-name{font-size:14.5px;letter-spacing:.03em}
  .brand{gap:8px}
  .header-actions .btn{padding:8px 13px;font-size:12.5px}
}

@media (max-width:860px){
  .footer-top{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}
}

/* ---------- 动效降级 ---------- */
@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;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .btn:hover,.card:hover,.footer-links a:hover{transform:none}
  .status-dot{animation:none;box-shadow:0 0 0 3px rgba(127,191,178,.18)}
}