/* ==========================================================================
   OG视讯厅 · 共享样式 /assets/site.css
   夜间控制台 · 双路径体系
   ========================================================================== */

/* 1 · Reset
   ------------------------------------------------------------------------- */
*,
*::before,
*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,li,dl,dd,figure,blockquote{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}
a{color:inherit;text-decoration:none}

/* 2 · 变量
   ------------------------------------------------------------------------- */
:root{
  --ink:#071320;
  --ink-2:#0C1D2F;
  --panel:#12283D;
  --line:#21415C;
  --white:#EDF3F9;
  --muted:#9DB0C2;
  --orange:#FF6B2C;
  --orange-soft:#FFA57A;
  --teal:#2FD3B4;
  --teal-deep:#128A75;
  --paper:#F6F8FB;
  --amber:#F2B544;

  --font-display:"HarmonyOS Sans SC","Source Han Sans SC","Bahnschrift Condensed","Oswald","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --maxw:1240px;
  --gutter:24px;
  --radius:3px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* 3 · 基础排版
   ------------------------------------------------------------------------- */
body{
  background-color:var(--ink);
  color:var(--white);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
@media (min-width:900px){ body{font-size:17px} }

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.02em;
  color:var(--white);
}
h1{font-size:clamp(38px,5.2vw,56px)}
h2{font-size:clamp(27px,3.4vw,40px)}
h3{font-size:clamp(20px,2vw,24px);line-height:1.3}
h4{font-size:18px;line-height:1.4}

p{text-wrap:pretty}

:focus-visible{
  outline:2px solid var(--teal);
  outline-offset:3px;
  border-radius:2px;
}
::selection{background:var(--orange);color:#0A1017}

/* 4 · 文本工具类
   ------------------------------------------------------------------------- */
.mono{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  font-variant-numeric:tabular-nums;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--orange);
}
.eyebrow::before{
  content:"";
  width:24px;
  height:1px;
  background:currentColor;
  flex:0 0 auto;
}
.lead{
  font-size:clamp(16px,1.4vw,19px);
  line-height:1.8;
  color:var(--muted);
  max-width:44ch;
}
.prose{max-width:42em}
.prose p + p{margin-top:1.1em}
.prose ul{margin:1.1em 0;padding-left:0}
.prose li{
  position:relative;
  padding-left:22px;
  margin-bottom:.5em;
  color:var(--muted);
}
.prose li::before{
  content:"";
  position:absolute;
  left:2px;
  top:.72em;
  width:8px;
  height:1px;
  background:var(--orange);
}

/* 5 · 布局
   ------------------------------------------------------------------------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gutter);
}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}

.section{
  position:relative;
  padding-block:clamp(48px,7vw,84px);
}
.section--tint{background:var(--ink-2)}
.section--flush{padding-block:0}

.rule{
  height:1px;
  border:0;
  background:linear-gradient(90deg,var(--line),rgba(33,65,92,0));
}

@media (max-width:900px){
  .span-4,.span-5,.span-6,.span-7,.span-8{grid-column:span 12}
}

/* 6 · 按钮与链接
   ------------------------------------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 22px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.2;
  cursor:pointer;
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--orange);color:#0A1017}
.btn--primary:hover{background:var(--orange-soft)}
.btn--pass{background:var(--teal);color:#04150F}
.btn--pass:hover{background:#5AE3CA}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--white)}
.btn--ghost:hover{border-color:var(--orange);color:var(--white)}
.btn--sm{padding:9px 16px;font-size:14px}
.btn__arrow{transition:transform .18s var(--ease)}
.btn:hover .btn__arrow{transform:translateX(4px)}

.arrow-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:700;
  font-size:15px;
  color:var(--orange);
  border-bottom:1px solid transparent;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.arrow-link::after{content:"→";transition:transform .18s var(--ease)}
.arrow-link:hover{border-bottom-color:var(--orange)}
.arrow-link:hover::after{transform:translateX(4px)}

/* 7 · 面包屑
   ------------------------------------------------------------------------- */
.breadcrumb{
  padding-block:18px;
  border-bottom:1px solid rgba(33,65,92,.55);
}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px;color:var(--muted)}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  color:var(--line);
}
.breadcrumb__link{color:var(--muted);transition:color .18s var(--ease)}
.breadcrumb__link:hover{color:var(--orange)}
.breadcrumb__current{color:var(--white)}

/* 8 · 面板 / 状态胶囊
   ------------------------------------------------------------------------- */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(18px,2vw,26px);
  clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,0 100%);
  transition:transform .18s var(--ease),border-color .18s var(--ease);
}
.panel:hover{transform:translateY(-2px);border-color:#2C5677}
.panel--quiet{background:var(--ink-2)}
.panel__head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  margin-bottom:14px;
}
.panel__title{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:800;
  letter-spacing:-.01em;
}

.status-pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(18,40,61,.55);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
  white-space:nowrap;
}
.status-pill__dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:currentColor;
  flex:0 0 auto;
}
.status-pill--pass{color:var(--teal);border-color:rgba(47,211,180,.38);background:rgba(18,138,117,.14)}
.status-pill--action{color:var(--orange);border-color:rgba(255,107,44,.38);background:rgba(255,107,44,.1)}
.status-pill--warn{color:var(--amber);border-color:rgba(242,181,68,.4);background:rgba(242,181,68,.1)}

/* 9 · 双版本对照
   ------------------------------------------------------------------------- */
.compare{
  display:grid;
  grid-template-columns:1fr 1px 1fr;
  background:var(--panel);
  border:1px solid var(--line);
}
.compare__col{padding:clamp(16px,2vw,26px)}
.compare__col--a{border-top:2px solid var(--orange)}
.compare__col--b{border-top:2px solid var(--teal)}
.compare__divider{background:var(--line)}
@media (max-width:760px){
  .compare{grid-template-columns:1fr}
  .compare__divider{height:1px;width:auto}
}

/* 10 · 路径步骤
   ------------------------------------------------------------------------- */
.path-steps{display:grid;gap:0}
.path-step{
  display:grid;
  grid-template-columns:64px minmax(0,1fr);
  gap:16px;
  padding:18px 0;
  border-bottom:1px solid rgba(33,65,92,.6);
  transition:border-color .18s var(--ease);
}
.path-step:first-child{border-top:1px solid rgba(33,65,92,.6)}
.path-step:hover{border-color:var(--orange)}
.path-step__num{
  font-family:var(--font-mono);
  font-size:20px;
  letter-spacing:.04em;
  color:var(--orange);
  font-variant-numeric:tabular-nums;
}
.path-step__title{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:800;
  color:var(--white);
  margin-bottom:4px;
}
.path-step__text{color:var(--muted);font-size:15px}
@media (max-width:600px){
  .path-step{grid-template-columns:44px minmax(0,1fr);gap:12px}
  .path-step__num{font-size:17px}
}

/* 11 · 图像容器（共享占位，供页面阶段使用）
   ------------------------------------------------------------------------- */
.figure{margin:0}
.figure__media{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  border:1px solid var(--line);
  background-color:var(--panel);
  background-image:
    linear-gradient(140deg,rgba(18,40,61,.95),rgba(7,19,32,.98)),
    repeating-linear-gradient(0deg,rgba(33,65,92,.5) 0 1px,transparent 1px 40px),
    repeating-linear-gradient(90deg,rgba(33,65,92,.5) 0 1px,transparent 1px 40px);
  background-blend-mode:normal,overlay,overlay;
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,0 100%);
}
.figure__media::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:2px;
  background:linear-gradient(90deg,var(--orange),rgba(255,107,44,0));
}
.figure__media > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure__media--panorama{aspect-ratio:21/9}
.figure--tall .figure__media{aspect-ratio:4/5}
.figure__label{
  position:absolute;
  top:12px;
  left:12px;
  z-index:2;
  padding:4px 10px;
  background:rgba(7,19,32,.82);
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
}
.figure__caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--muted);
}

/* 12 · 可折叠侧栏
   ------------------------------------------------------------------------- */
.site-rail{
  position:sticky;
  top:96px;
  padding:20px;
  background:var(--ink-2);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,0 100%);
}
.site-rail__title{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--orange);
  margin-bottom:12px;
}
.site-rail__list li + li{margin-top:8px}
body.rail-collapsed .site-rail{display:none}
@media (max-width:1024px){
  .site-rail{position:static;top:auto}
}

/* 13 · 跳过链接
   ------------------------------------------------------------------------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-64px;
  z-index:200;
  padding:10px 18px;
  background:var(--orange);
  color:#0A1017;
  font-weight:700;
  font-size:14px;
  border-radius:var(--radius);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* 14 · 头部
   ------------------------------------------------------------------------- */
.site-header{
  --header-h:74px;
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(7,19,32,.93);
  border-bottom:1px solid var(--line);
  transition:background .18s var(--ease),box-shadow .18s var(--ease);
}
.site-header.is-condensed{
  --header-h:56px;
  background:rgba(7,19,32,.98);
  box-shadow:0 12px 28px rgba(0,0,0,.42);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
  height:var(--header-h);
  transition:height .18s var(--ease);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  min-width:0;
}
.brand__mark{
  position:relative;
  width:32px;
  height:32px;
  flex:0 0 auto;
  border:1px solid var(--line);
  background:linear-gradient(150deg,rgba(255,107,44,.22),rgba(18,40,61,.9));
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.brand__mark::before{
  content:"";
  position:absolute;
  left:7px;
  bottom:8px;
  width:16px;
  height:1px;
  background:var(--orange);
  transform:rotate(-38deg);
  transform-origin:left center;
}
.brand__mark::after{
  content:"";
  position:absolute;
  right:6px;
  top:7px;
  width:5px;
  height:5px;
  background:var(--teal);
  border-radius:50%;
}
.brand__text{display:flex;flex-direction:column;line-height:1.1;min-width:0}
.brand__name{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:800;
  letter-spacing:.01em;
  color:var(--white);
  white-space:nowrap;
}
.brand__code{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--muted);
  white-space:nowrap;
}
.status-lamp{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:4px 10px;
  border:1px solid rgba(47,211,180,.32);
  border-radius:999px;
  background:rgba(18,138,117,.12);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
  color:var(--teal);
  white-space:nowrap;
}
.status-lamp__dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--teal);
  box-shadow:0 0 0 3px rgba(47,211,180,.16);
  animation:lampPulse 2.4s var(--ease) infinite;
}
@keyframes lampPulse{
  0%,100%{box-shadow:0 0 0 3px rgba(47,211,180,.16)}
  50%{box-shadow:0 0 0 6px rgba(47,211,180,.06)}
}

/* 导航 */
.header-nav{margin-left:auto;min-width:0}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;
  display:inline-flex;
  flex-direction:column;
  gap:1px;
  padding:8px 11px 9px;
  color:var(--muted);
  border-radius:var(--radius);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link__code{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--line);
  transition:color .18s var(--ease);
}
.nav-link__label{
  font-size:14px;
  font-weight:600;
  letter-spacing:.01em;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:11px;
  right:11px;
  bottom:3px;
  height:1px;
  background:var(--orange);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--white);background:rgba(18,40,61,.6)}
.nav-link:hover .nav-link__code{color:var(--orange-soft)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--white);background:rgba(255,107,44,.1)}
.nav-link[aria-current="page"] .nav-link__code{color:var(--orange)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-link[aria-current="page"]::before{
  content:"";
  position:absolute;
  left:0;
  top:8px;
  bottom:9px;
  width:2px;
  background:var(--orange);
}

/* 工具区 */
.header-tools{
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:10px;
  padding-left:16px;
  border-left:1px solid var(--line);
  flex:0 0 auto;
}
.version-pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:34px;
  padding:0 13px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(18,40,61,.72);
  color:var(--white);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  cursor:pointer;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.version-pill:hover{border-color:var(--orange-soft);background:rgba(18,40,61,1)}
.version-pill__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 0 3px rgba(255,107,44,.16);
  transition:background .18s var(--ease),box-shadow .18s var(--ease);
}
.version-pill[data-version="mainland"] .version-pill__dot{
  background:var(--teal);
  box-shadow:0 0 0 3px rgba(47,211,180,.16);
}
.version-pill__label{white-space:nowrap}

.tool-btn{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:34px;
  padding:0 11px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--muted);
  font-size:13px;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.tool-btn:hover{border-color:var(--orange);color:var(--white);background:rgba(255,107,44,.08)}
.tool-btn[aria-pressed="true"]{border-color:var(--amber);color:var(--amber);background:rgba(242,181,68,.1)}
.tool-btn__icon{font-size:13px;line-height:1}
.tool-btn__text{white-space:nowrap}

/* 移动端菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  height:34px;
  padding:0 12px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--white);
  font-size:13px;
  cursor:pointer;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--orange)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:16px}
.nav-toggle__bar{
  display:block;
  height:1.5px;
  width:100%;
  background:var(--orange);
  transition:transform .18s var(--ease),opacity .18s var(--ease);
}
.nav-toggle__text{white-space:nowrap}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child{transform:translateY(2.75px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:last-child{transform:translateY(-2.75px) rotate(-45deg)}

/* 移动菜单底部路径 */
.nav-foot{display:none}

/* 15 · 页脚
   ------------------------------------------------------------------------- */
.site-footer{
  position:relative;
  background:var(--ink-2);
  color:var(--white);
  border-top:1px solid var(--line);
  margin-top:0;
}
.footer-path{
  position:relative;
  height:1px;
  max-width:var(--maxw);
  margin-inline:auto;
  background:linear-gradient(90deg,rgba(33,65,92,0),var(--line) 10%,var(--line) 90%,rgba(33,65,92,0));
}
.footer-path__line{display:block;height:1px}
.footer-path__node{
  position:absolute;
  top:50%;
  width:8px;
  height:8px;
  transform:translate(-50%,-50%) rotate(45deg);
  background:var(--ink-2);
  border:1px solid var(--line);
  transition:background .4s var(--ease),border-color .4s var(--ease),box-shadow .4s var(--ease);
}
.footer-path__node.is-lit{
  background:var(--orange);
  border-color:var(--orange-soft);
  box-shadow:0 0 12px rgba(255,107,44,.65);
}
.footer-path__node:last-child.is-lit{
  background:var(--teal);
  border-color:var(--teal);
  box-shadow:0 0 12px rgba(47,211,180,.6);
}
.footer-path__node:nth-child(2){left:2%}
.footer-path__node:nth-child(3){left:20%}
.footer-path__node:nth-child(4){left:40%}
.footer-path__node:nth-child(5){left:60%}
.footer-path__node:nth-child(6){left:80%}
.footer-path__node:nth-child(7){left:98%}

.footer-inner{padding-block:clamp(36px,5vw,56px) 28px}
.footer-grid{
  display:grid;
  grid-template-columns:1.35fr .8fr .8fr 1.25fr;
  gap:clamp(20px,3vw,40px);
}
.footer-col{min-width:0}
.footer-col--brand{display:flex;flex-direction:column;gap:10px}
.footer-brand__name{
  font-family:var(--font-display);
  font-size:24px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--white);
}
.footer-brand__meta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
  line-height:1.7;
}
.footer-brand__icp{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--line);
  border-left:2px solid var(--orange);
  padding-left:10px;
}
.footer-title{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--orange);
  margin-bottom:14px;
}
.footer-list li + li{margin-top:8px}
.footer-link{
  display:inline-block;
  font-size:14px;
  color:var(--muted);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-link:hover{color:var(--white);transform:translateX(3px)}
.footer-list--contact li + li{margin-top:12px}
.footer-contact__row{display:flex;flex-direction:column;gap:2px}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--line);
  text-transform:uppercase;
}
.footer-contact__value{
  font-size:14px;
  color:var(--white);
  word-break:break-word;
}
.footer-note{
  margin-top:16px;
  font-size:13px;
  line-height:1.7;
  color:var(--muted);
  max-width:34ch;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(28px,4vw,44px);
  padding-top:18px;
  border-top:1px solid rgba(33,65,92,.7);
}
.footer-legal,
.footer-contact-line{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--muted);
  line-height:1.7;
}

/* 16 · 动效钩子
   ------------------------------------------------------------------------- */
[data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:2px;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--orange),var(--teal));
  z-index:120;
  pointer-events:none;
}

body.nav-open{overflow:hidden}

/* 17 · 平板与手机
   ------------------------------------------------------------------------- */
@media (max-width:1200px){
  .nav-link__code{display:none}
  .nav-link{flex-direction:row;align-items:baseline;padding:9px 8px 10px}
  .nav-link__label{font-size:13.5px}
  .nav-link::after{left:8px;right:8px}
  .nav-link[aria-current="page"]::before{display:none}
}
@media (max-width:1100px){
  .status-lamp{display:none}
}

@media (max-width:1080px){
  .site-header{--header-h:62px}
  .header-inner{gap:12px}

  .header-nav{
    position:fixed;
    inset:0;
    z-index:95;
    display:flex;
    flex-direction:column;
    margin:0;
    padding:calc(var(--header-h) + 24px) var(--gutter) 32px;
    background:var(--ink);
    border-top:1px solid var(--line);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-14px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear;
  }
  .header-nav[data-open]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:none;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item + .nav-item{border-top:1px solid rgba(33,65,92,.55)}
  .nav-link{
    flex-direction:row;
    align-items:center;
    gap:16px;
    padding:16px 4px;
    font-size:20px;
    color:var(--white);
    border-radius:0;
  }
  .nav-link__code{display:inline-block;font-size:12px;color:var(--orange);letter-spacing:.16em}
  .nav-link__label{font-size:20px;font-weight:700;font-family:var(--font-display);letter-spacing:-.01em}
  .nav-link::after{display:none}
  .nav-link:hover,.nav-link[aria-current="page"]{
    background:linear-gradient(90deg,rgba(255,107,44,.14),rgba(255,107,44,0));
  }
  .nav-link[aria-current="page"]::before{
    display:block;
    left:0;
    top:12px;
    bottom:12px;
    width:2px;
  }

  .nav-foot{
    display:flex;
    flex-direction:column;
    gap:10px;
    margin-top:auto;
    padding-top:28px;
    border-top:1px solid var(--line);
  }
  .nav-foot__label{
    font-family:var(--font-mono);
    font-size:11px;
    letter-spacing:.16em;
    text-transform:uppercase;
    color:var(--line);
  }
  .nav-foot__link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:13px 16px;
    border:1px solid var(--line);
    border-radius:var(--radius);
    background:var(--panel);
    font-size:15px;
    font-weight:700;
    color:var(--white);
    transition:border-color .18s var(--ease),background .18s var(--ease);
  }
  .nav-foot__link:hover{border-color:var(--orange);background:rgba(255,107,44,.1)}

  .header-tools{margin-left:auto;padding-left:0;border-left:0;gap:8px}
  .tool-btn{display:none}
  .nav-toggle{display:inline-flex}
  .version-pill{height:32px;padding:0 11px;font-size:11px}

  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-col--brand{grid-column:1 / -1}
}

@media (max-width:640px){
  .header-inner{padding-inline:16px;gap:10px}
  .brand__code{display:none}
  .brand__name{font-size:16px}
  .brand__mark{width:28px;height:28px}
  .version-pill__label{max-width:4em;overflow:hidden;text-overflow:ellipsis}
  .footer-grid{grid-template-columns:1fr}
  .footer-note{max-width:none}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .footer-path__node{width:6px;height:6px}
  .breadcrumb{padding-block:14px}
}

/* 18 · 无障碍与降级
   ------------------------------------------------------------------------- */
@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;
  }
  [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
  .panel:hover{transform:none}
  .footer-link:hover{transform:none}
}
@media print{
  .site-header,.site-footer,.skip-link,.scroll-progress{display:none !important}
  body{background:#fff;color:#000}
}