:root {
  --void: #03080d;
  --panel: rgba(7, 18, 27, .82);
  --panel-solid: #07121b;
  --line: rgba(89, 222, 255, .2);
  --line-hot: rgba(89, 222, 255, .65);
  --cyan: #59deff;
  --ice: #d8f6ff;
  --muted: #7f9eaa;
  --amber: #ffb454;
  --red: #ff5e6c;
  --max: 1180px;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --sans: Inter, "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--void); }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ice);
  font-family: var(--sans);
  background:
    radial-gradient(circle at 78% 12%, rgba(19, 124, 155, .19), transparent 31rem),
    radial-gradient(circle at 8% 76%, rgba(255, 180, 84, .07), transparent 28rem),
    linear-gradient(rgba(89,222,255,.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(89,222,255,.026) 1px, transparent 1px),
    var(--void);
  background-size: auto, auto, 48px 48px, 48px 48px, auto;
  line-height: 1.72;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(transparent 50%, rgba(0,0,0,.08) 50%);
  background-size: 100% 4px;
  opacity: .38;
  z-index: 20;
}
a { color: inherit; }
button, input { font: inherit; }
.shell { width: min(calc(100% - 36px), var(--max)); margin: 0 auto; }
.topline {
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--amber) 62%, transparent);
  box-shadow: 0 0 24px rgba(89,222,255,.42);
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 15;
  backdrop-filter: blur(18px);
  background: rgba(3,8,13,.8);
  border-bottom: 1px solid var(--line);
}
.nav {
  min-height: 70px;
  display: flex;
  gap: 22px;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark {
  width: 34px; height: 34px; border: 1px solid var(--cyan); position: relative;
  transform: rotate(45deg); box-shadow: inset 0 0 18px rgba(89,222,255,.18);
}
.brand-mark::before, .brand-mark::after { content: ""; position: absolute; background: var(--cyan); }
.brand-mark::before { width: 14px; height: 1px; top: 16px; left: 9px; }
.brand-mark::after { width: 1px; height: 14px; top: 9px; left: 16px; }
.brand-text strong { display: block; font: 700 13px/1 var(--mono); letter-spacing: .14em; }
.brand-text span { color: var(--muted); font: 10px/1 var(--mono); letter-spacing: .18em; }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { color: var(--muted); font: 11px/1 var(--mono); letter-spacing: .13em; text-decoration: none; }
.nav-links a:hover { color: var(--cyan); }
.lang-switch {
  display: flex; border: 1px solid var(--line); background: rgba(255,255,255,.02);
  clip-path: polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.lang-switch button {
  border: 0; padding: 8px 11px; background: transparent; color: var(--muted);
  font: 700 10px/1 var(--mono); cursor: pointer; letter-spacing: .08em;
}
.lang-switch button.active { color: #001017; background: var(--cyan); }
.hero { min-height: 700px; display: grid; grid-template-columns: 1.45fr .55fr; gap: 72px; align-items: center; padding: 80px 0 58px; }
.eyebrow, .section-kicker, .meta-code { color: var(--cyan); font: 700 10px/1.4 var(--mono); letter-spacing: .24em; text-transform: uppercase; }
.eyebrow::before, .section-kicker::before { content: "// "; color: var(--amber); }
.hero h1 { margin: 20px 0; max-width: 820px; font-size: clamp(48px, 7.5vw, 104px); line-height: .94; letter-spacing: -.065em; }
.hero h1 > span { display: block; }
.hero h1 > .outline { color: transparent; -webkit-text-stroke: 1px rgba(216,246,255,.58); }
.hero-copy { max-width: 690px; color: #a7c0ca; font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 17px;
  border: 1px solid var(--line-hot); color: var(--ice); text-decoration: none;
  font: 700 11px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase;
  clip-path: polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px);
}
.button.primary { background: var(--cyan); color: #001018; }
.button:hover { box-shadow: 0 0 28px rgba(89,222,255,.22); }
.telemetry {
  position: relative; min-height: 390px; display: grid; place-items: center;
}
.orbit, .orbit::before, .orbit::after { border: 1px solid var(--line); border-radius: 50%; position: absolute; }
.orbit { width: 310px; height: 310px; animation: spin 26s linear infinite; }
.orbit::before { content: ""; inset: 28px; border-color: rgba(255,180,84,.24); }
.orbit::after { content: ""; inset: 70px; border-style: dashed; }
.orbit i { position: absolute; width: 9px; height: 9px; border-radius: 50%; background: var(--cyan); top: 15px; left: 83px; box-shadow: 0 0 18px var(--cyan); }
@keyframes spin { to { transform: rotate(360deg); } }
.core { width: 138px; height: 138px; border: 1px solid var(--line-hot); display: grid; place-items: center; transform: rotate(45deg); background: rgba(4,15,22,.8); }
.core span { transform: rotate(-45deg); font: 700 10px/1.6 var(--mono); text-align: center; color: var(--cyan); letter-spacing: .11em; }
.telemetry-note { position: absolute; bottom: 0; width: 100%; border-top: 1px solid var(--line); padding-top: 12px; display: flex; justify-content: space-between; color: var(--muted); font: 9px/1 var(--mono); letter-spacing: .1em; }
.signal-strip { border-block: 1px solid var(--line); background: rgba(8,24,34,.56); overflow: hidden; }
.signal-track { width: max-content; display: flex; gap: 54px; padding: 11px 0; animation: crawl 28s linear infinite; color: var(--muted); font: 9px/1 var(--mono); letter-spacing: .14em; }
.signal-track b { color: var(--cyan); }
@keyframes crawl { to { transform: translateX(-50%); } }
.section { padding: 92px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 34px; }
.section-head h2 { margin: 10px 0 0; font-size: clamp(31px, 4vw, 54px); line-height: 1; letter-spacing: -.045em; }
.section-note { max-width: 430px; color: var(--muted); font-size: 13px; }
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.article-card {
  min-height: 320px; display: flex; flex-direction: column; position: relative; overflow: hidden;
  padding: 22px; border: 1px solid var(--line); background: var(--panel); text-decoration: none;
  clip-path: polygon(16px 0,100% 0,100% calc(100% - 16px),calc(100% - 16px) 100%,0 100%,0 16px);
  transition: transform .22s ease, border-color .22s ease, background .22s ease;
}
.article-card::before { content: ""; position: absolute; inset: 0; background: linear-gradient(125deg, transparent 60%, rgba(89,222,255,.08)); opacity: 0; transition: opacity .2s; }
.article-card:hover { transform: translateY(-5px); border-color: var(--line-hot); background: rgba(8,25,35,.96); }
.article-card:hover::before { opacity: 1; }
.card-top, .card-bottom { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font: 9px/1.3 var(--mono); letter-spacing: .12em; }
.card-top .status { color: var(--amber); }
.article-card h3 { margin: 42px 0 14px; font-size: 23px; line-height: 1.22; letter-spacing: -.025em; }
.article-card p { margin: 0 0 28px; color: #8ca9b5; font-size: 13px; }
.card-bottom { margin-top: auto; padding-top: 16px; border-top: 1px solid var(--line); }
.skills-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 16px; }
.console-panel, .skills-panel { border: 1px solid var(--line); background: var(--panel); padding: 26px; }
.console-line { display: grid; grid-template-columns: 94px 1fr 45px; gap: 15px; align-items: center; padding: 13px 0; border-bottom: 1px solid rgba(89,222,255,.09); font: 10px/1 var(--mono); color: var(--muted); }
.console-line b { color: var(--ice); font-weight: 500; }
.bar { height: 3px; background: rgba(89,222,255,.1); }
.bar i { display: block; height: 100%; background: linear-gradient(90deg,var(--cyan),var(--amber)); box-shadow: 0 0 12px rgba(89,222,255,.45); }
.skills-panel h3 { margin-top: 0; font-size: 24px; }
.skills-panel p { color: var(--muted); font-size: 13px; }
.metric { display: flex; align-items: baseline; justify-content: space-between; padding: 18px 0; border-top: 1px solid var(--line); }
.metric strong { font: 700 36px/1 var(--mono); color: var(--cyan); }
.metric span { color: var(--muted); font: 9px/1 var(--mono); letter-spacing: .12em; }
.archive-hero { padding: 70px 0 40px; border-bottom: 1px solid var(--line); }
.archive-hero h1, .article-title { margin: 14px 0; font-size: clamp(42px, 7vw, 86px); line-height: .98; letter-spacing: -.06em; }
.archive-tools { display: flex; gap: 12px; margin: 28px 0 0; }
.search {
  flex: 1; border: 1px solid var(--line); color: var(--ice); background: rgba(5,14,21,.8);
  padding: 12px 14px; outline: none; font: 11px/1 var(--mono); letter-spacing: .06em;
}
.search:focus { border-color: var(--line-hot); }
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.filter { border: 1px solid var(--line); background: transparent; color: var(--muted); padding: 10px 12px; cursor: pointer; font: 9px/1 var(--mono); letter-spacing: .09em; }
.filter.active, .filter:hover { border-color: var(--cyan); color: var(--cyan); }
.archive-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; padding: 40px 0 90px; }
.archive-grid .article-card { min-height: 270px; }
.article-hero { padding: 66px 0 40px; border-bottom: 1px solid var(--line); }
.article-hero .article-title { max-width: 1000px; }
body[data-lang="en"] .article-title { font-size: clamp(38px, 6vw, 72px); }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 28px; color: var(--muted); font: 9px/1.4 var(--mono); letter-spacing: .12em; }
.article-meta b { color: var(--cyan); }
.progress { position: fixed; top: 0; left: 0; z-index: 40; height: 3px; width: 0; background: linear-gradient(90deg,var(--cyan),var(--amber)); }
.article-layout { display: grid; grid-template-columns: minmax(0, 760px) 250px; gap: 74px; align-items: start; padding: 56px 0 110px; }
.article-body { min-width: 0; }
.article-body h2, .article-body h3 { scroll-margin-top: 100px; position: relative; line-height: 1.25; letter-spacing: -.025em; }
.article-body h2 { margin: 64px 0 24px; padding-top: 23px; border-top: 1px solid var(--line); font-size: 29px; }
.article-body h3 { margin: 44px 0 20px; font-size: 22px; color: var(--cyan); }
.article-body h2::before, .article-body h3::before { content: attr(data-index); display: block; margin-bottom: 9px; color: var(--amber); font: 9px/1 var(--mono); letter-spacing: .15em; }
.article-body p { margin: 0 0 21px; color: #b1c7cf; font-size: 16px; text-align: justify; }
.article-body > p:first-of-type { font-size: 19px; color: var(--ice); }
.toc { position: sticky; top: 100px; border-left: 1px solid var(--line); padding-left: 20px; }
.toc strong { display: block; margin-bottom: 14px; color: var(--cyan); font: 10px/1 var(--mono); letter-spacing: .16em; }
.toc a { display: block; padding: 6px 0; color: var(--muted); text-decoration: none; font-size: 11px; line-height: 1.35; }
.toc a:hover { color: var(--cyan); }
.site-footer { border-top: 1px solid var(--line); padding: 30px 0 44px; color: var(--muted); font: 9px/1.7 var(--mono); letter-spacing: .1em; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; }
.footer-inner b { color: var(--cyan); }
body[data-lang="zh"] .lang-en { display: none !important; }
body[data-lang="en"] .lang-zh { display: none !important; }
.hidden-card { display: none; }
@media (max-width: 900px) {
  .nav-links a { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 70px; gap: 30px; }
  .telemetry { min-height: 330px; }
  .article-grid, .archive-grid { grid-template-columns: 1fr 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .toc { display: none; }
}
@media (max-width: 620px) {
  .shell { width: min(calc(100% - 24px), var(--max)); }
  .brand-text span { display: none; }
  .nav { min-height: 60px; }
  .hero h1 { font-size: 52px; }
  .telemetry { transform: scale(.86); margin-inline: -20px; }
  .section { padding: 68px 0; }
  .section-head { align-items: start; flex-direction: column; }
  .article-grid, .archive-grid { grid-template-columns: 1fr; }
  .archive-tools { flex-direction: column; }
  .article-body p { font-size: 15px; text-align: left; }
  .article-body h2 { font-size: 25px; }
  .article-title, .archive-hero h1 { font-size: 43px; }
  .footer-inner { flex-direction: column; }
}