:root{
  --ink:#07111F;
  --ink-2:#0D1B2E;
  --panel:#12243A;
  --paper:#F7FBFF;
  --muted:#9AB0C4;
  --line:#27445F;
  --mint:#35F2C8;
  --amber:#FFB547;
  --sky:#5BC8FF;
  --body-text:#D6E3EF;
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:Inter,"Noto Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono",SFMono-Regular,Consolas,"Liberation Mono",monospace;
  --shell:1280px;
  --gutter:clamp(16px,4vw,36px);
  --header-h:68px;
  --cut:12px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:96px;
}

body{
  margin:0;
  min-height:100vh;
  background:var(--ink);
  color:var(--body-text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img,picture,svg,video{max-width:100%;height:auto}
a{color:inherit}
button{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}

:focus-visible{
  outline:2px solid var(--mint);
  outline-offset:3px;
}

/* ---------- 文字层 ---------- */
h1,h2,h3,h4{
  margin:0;
  color:var(--paper);
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.15;
}

.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2.25rem,6vw,5.5rem);
  line-height:1.02;
  letter-spacing:-.03em;
  color:var(--paper);
}

.lead{
  font-size:clamp(1rem,1.3vw,1.125rem);
  line-height:1.8;
  color:var(--muted);
  max-width:52ch;
}

.kicker{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--mint);
  margin:0 0 12px;
}

.mono{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  font-variant-numeric:tabular-nums;
}

.annot{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.32em;
  text-transform:uppercase;
  color:var(--muted);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--sky);
  background:rgba(91,200,255,.05);
}
.tag--mint{color:var(--mint);border-color:rgba(53,242,200,.42);background:rgba(53,242,200,.06)}
.tag--amber{color:var(--amber);border-color:rgba(255,181,71,.45);background:rgba(255,181,71,.07)}

.visually-hidden{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;border:0;
}

/* ---------- 布局 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(48px,6vw,96px)}

.stack > * + *{margin-top:clamp(14px,1.6vw,22px)}

.grid{display:grid;gap:clamp(14px,1.8vw,24px)}
.grid-2{display:grid;gap:clamp(14px,1.8vw,24px);grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{display:grid;gap:clamp(14px,1.8vw,24px);grid-template-columns:repeat(3,minmax(0,1fr))}

.bento{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(14px,1.6vw,20px);
}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-6{grid-column:span 6}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-120px;
  z-index:220;
  padding:10px 18px;
  background:var(--mint);
  color:#05121C;
  font-weight:700;
  font-size:14px;
  text-decoration:none;
  border-radius:2px;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 头部命令栏 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,17,31,.94);
  border-bottom:1px solid var(--line);
  transition:background-color .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header[data-scrolled]{
  background:rgba(7,17,31,.995);
  box-shadow:0 18px 40px rgba(0,0,0,.45);
}

.scroll-meter{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  pointer-events:none;
  overflow:hidden;
}
.scroll-meter span{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--mint),var(--sky));
}

.header-shell{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,24px);
  min-height:var(--header-h);
  transition:min-height .22s var(--ease);
}
.site-header[data-scrolled] .header-shell{min-height:56px}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  color:var(--paper);
  flex:0 0 auto;
}
.brand-mark{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  background:var(--mint);
  color:#04121C;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  clip-path:polygon(0 0,100% 0,100% 66%,66% 100%,0 100%);
}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.12;
}
.brand-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:19px;
  letter-spacing:.02em;
  color:var(--paper);
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--muted);
  margin-top:2px;
}

.command-bar{flex:1 1 auto;min-width:0}
.command-list{display:flex;align-items:center;gap:2px}
.command-link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:9px 11px;
  color:var(--muted);
  font-size:14px;
  line-height:1.4;
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s var(--ease);
}
.command-index{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.08em;
  color:var(--line);
  transition:color .18s var(--ease);
}
.command-link::after{
  content:"";
  position:absolute;
  left:11px;right:11px;bottom:3px;
  height:2px;
  background:var(--sky);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease),background-color .18s var(--ease);
}
.command-link:hover{color:var(--paper)}
.command-link:hover::after{transform:scaleX(1)}
.command-link[aria-current="page"]{color:var(--paper)}
.command-link[aria-current="page"] .command-index{color:var(--mint)}
.command-link[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--mint);
}

.header-rail{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.week-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 9px;
  border:1px solid var(--line);
  background:rgba(91,200,255,.06);
  color:var(--sky);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  white-space:nowrap;
}
.week-dot{
  width:6px;height:6px;
  background:var(--mint);
  box-shadow:0 0 0 3px rgba(53,242,200,.16);
}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;
  height:38px;
  padding:0;
  background:transparent;
  border:1px solid var(--line);
  color:var(--paper);
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--mint);color:var(--mint)}
.nav-toggle-bars{
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  width:18px;
  height:12px;
}
.nav-toggle-bars > span{
  display:block;
  height:2px;
  width:100%;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.site-header[data-open] .nav-toggle{border-color:var(--mint);color:var(--mint)}
.site-header[data-open] .nav-toggle-bars > span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bars > span:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle-bars > span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 20px;
  border:1px solid transparent;
  border-radius:2px;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  line-height:1;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-sm{padding:9px 14px;font-size:13px}
.btn-amber{
  background:var(--amber);
  border-color:var(--amber);
  color:#0A1119;
  box-shadow:inset 0 -2px 0 rgba(0,0,0,.16);
}
.btn-amber:hover{
  background:#FFC97D;
  border-color:#FFC97D;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.12),0 8px 20px rgba(255,181,71,.18);
}
.btn-ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--paper);
}
.btn-ghost:hover{border-color:var(--mint);color:var(--mint)}

/* ---------- 面包屑 ---------- */
.crumbs{margin:0 0 clamp(18px,2.4vw,28px)}
.crumbs ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--muted);
}
.crumbs li{display:inline-flex;align-items:center;gap:8px}
.crumbs li + li::before{
  content:"/";
  color:var(--line);
}
.crumbs a{
  color:var(--muted);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.crumbs a:hover{color:var(--mint)}
.crumbs [aria-current="page"]{color:var(--mint)}

/* ---------- 切角面板 ---------- */
.panel{
  position:relative;
  --notch:var(--ink);
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:2px;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.panel::after{
  content:"";
  position:absolute;
  top:-1px;right:-1px;
  width:22px;height:22px;
  background-image:linear-gradient(to bottom left,var(--notch) 0 50%,transparent 50%);
  pointer-events:none;
}
.panel:hover{border-color:var(--mint)}

/* ---------- 正文 ---------- */
.prose{
  max-width:68ch;
  font-size:17px;
  line-height:1.8;
  color:var(--body-text);
}
.prose > * + *{margin-top:1em}
.prose h2{
  font-size:clamp(1.35rem,2.2vw,1.9rem);
  margin-top:2.1em;
  padding-top:.7em;
  border-top:1px solid var(--line);
  letter-spacing:-.015em;
}
.prose h3{
  font-size:clamp(1.1rem,1.6vw,1.35rem);
  margin-top:1.7em;
  color:var(--paper);
}
.prose p{color:var(--body-text)}
.prose ul{list-style:none}
.prose ul li{
  position:relative;
  padding-left:20px;
  margin-top:.5em;
}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:10px;height:1px;
  background:var(--mint);
}
.prose a{color:var(--mint);text-decoration:none;border-bottom:1px solid rgba(53,242,200,.4)}
.prose a:hover{border-bottom-color:var(--mint)}
.prose strong{color:var(--paper)}

/* ---------- 图片容器 ---------- */
.figure{
  position:relative;
  display:block;
  margin:0;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:2px;
  background-color:var(--panel);
  background-image:
    repeating-linear-gradient(0deg,rgba(39,68,95,.55) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(90deg,rgba(39,68,95,.55) 0 1px,transparent 1px 44px);
  aspect-ratio:16/9;
}
.figure img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,17,31,0) 42%,rgba(7,17,31,.82) 100%);
  pointer-events:none;
}
.figure figcaption{
  position:absolute;
  left:0;right:0;bottom:0;
  z-index:2;
  padding:12px 14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--paper);
}
.figure--wide{aspect-ratio:16/9}
.figure--screen{aspect-ratio:21/9}
.figure--portrait{aspect-ratio:3/4}
.figure--square{aspect-ratio:1/1}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(72px,9vw,128px);
  background:var(--ink-2);
  border-top:1px solid var(--line);
  color:var(--muted);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--mint) 0 96px,var(--line) 96px 100%);
}
.footer-shell{
  padding-top:clamp(44px,5vw,72px);
  padding-bottom:28px;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(240px,1fr) minmax(0,2.5fr);
  gap:clamp(28px,4vw,60px);
  padding-bottom:clamp(28px,3.5vw,44px);
  border-bottom:1px solid var(--line);
}
.footer-brand{min-width:0}
.footer-mark{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.6rem,2.6vw,2.15rem);
  letter-spacing:-.01em;
  color:var(--paper);
  line-height:1.1;
}
.footer-line{
  margin-top:12px;
  font-size:15px;
  line-height:1.7;
  color:var(--muted);
  max-width:24ch;
}
.footer-meta{
  display:inline-block;
  margin-top:16px;
  padding:5px 9px;
  border:1px solid var(--line);
  color:var(--sky);
  font-size:11px;
  letter-spacing:.12em;
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(20px,2.6vw,32px);
}
.footer-col{min-width:0}
.footer-col-title{
  margin:0 0 14px;
  padding-left:10px;
  border-left:2px solid var(--mint);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--paper);
  line-height:1.4;
}
.footer-list li + li{margin-top:9px}
.footer-list a{
  font-size:14px;
  color:var(--muted);
  text-decoration:none;
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.footer-list a:hover{color:var(--mint);padding-left:4px}
.footer-list--plain li{
  font-size:13px;
  line-height:1.65;
  color:var(--muted);
  word-break:break-word;
}
.footer-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.footer-tags li{
  padding:4px 9px;
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.footer-tags li:hover{border-color:rgba(255,181,71,.5);color:var(--amber)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 24px;
  padding-top:22px;
  border-top:1px solid rgba(39,68,95,.5);
}
.footer-legal{
  color:var(--muted);
  font-size:11px;
  letter-spacing:.1em;
}
.footer-legal-links{
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
}
.footer-legal-links a{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-legal-links a:hover{color:var(--mint);border-bottom-color:var(--mint)}
.footer-note{
  margin-top:14px;
  font-size:12px;
  line-height:1.7;
  color:rgba(154,176,196,.75);
}

/* ---------- 响应式：平板 ---------- */
@media (max-width:1120px){
  .week-badge{display:none}
  .command-link{padding:9px 9px;font-size:13.5px}
  .command-link::after{left:9px;right:9px}
}

@media (max-width:1024px){
  .footer-top{grid-template-columns:1fr}
  .footer-line{max-width:40ch}
}

@media (max-width:960px){
  .header-shell{gap:10px}
  .brand-sub{display:none}
  .nav-toggle{display:inline-flex;order:3}
  .header-rail{order:2;margin-left:auto;gap:8px}
  .command-bar{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    background:var(--ink-2);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    box-shadow:0 28px 50px rgba(0,0,0,.6);
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
  }
  .site-header[data-open] .command-bar{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
  .command-list{flex-direction:column;align-items:stretch;gap:0;padding:8px 0}
  .command-link{
    display:flex;
    width:100%;
    padding:14px 18px;
    font-size:16px;
    border-bottom:1px solid rgba(39,68,95,.45);
  }
  .command-link::after{left:18px;right:auto;bottom:10px;width:34px}
  body.nav-open{overflow:hidden}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .col-3,.col-4,.col-6{grid-column:span 6}
  .col-8{grid-column:span 12}
}

/* ---------- 响应式：手机 ---------- */
@media (max-width:640px){
  html{scroll-padding-top:80px}
  .header-shell{min-height:60px;gap:8px}
  .brand-mark{width:30px;height:30px;font-size:11px}
  .brand-name{font-size:17px}
  .btn-sm{padding:8px 11px;font-size:12.5px}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .col-3,.col-4,.col-6,.col-8{grid-column:span 12}
  .footer-cols{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .footer-legal-links{gap:8px 16px}
  .prose{font-size:16px}
}

@media (max-width:400px){
  .brand-text{display:none}
}

/* ---------- 动效偏好 ---------- */
@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-meter span{transition:none}
}