:root {
  color-scheme: dark;
  --bg: #080b10;
  --panel: #0e131b;
  --line: #202a38;
  --text: #edf3fb;
  --muted: #8995a5;
  --blue: #247cff;
  --content: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: Arial, "Microsoft YaHei", sans-serif;
  letter-spacing: .02em;
}
a { color: inherit; text-decoration: none; }
.site-header {
  height: 72px; padding: 0 max(24px, calc((100vw - var(--content)) / 2));
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 20;
  background: rgba(8, 11, 16, .96); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 11px; font-size: 14px; font-weight: 800; letter-spacing: .13em; }
.brand-mark { display: grid; place-items: center; width: 30px; height: 30px; background: var(--blue); color: white; font-size: 11px; }
.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav a, #language-select { color: #b6c0ce; font-size: 12px; }
.site-nav a:hover { color: white; }
#language-select { background: var(--panel); border: 1px solid var(--line); padding: 8px; }
.menu-toggle { display: none; }
.section-shell { width: min(var(--content), calc(100% - 48px)); margin-inline: auto; }
.hero { min-height: 650px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding-block: 70px; }
.hero-art { width: min(760px, 100%); margin-bottom: 28px; }
.hero-art img { display: block; width: 100%; height: auto; object-fit: contain; }
.eyebrow { color: var(--blue); font-size: 10px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; }
.hero h1 { margin: 12px 0 0; font-size: clamp(38px, 7vw, 76px); font-style: italic; letter-spacing: .08em; }
.hero-subtitle { margin: 4px 0; color: #aeb9c8; font-size: 16px; letter-spacing: .35em; }
.hero-copy { margin: 18px 0 28px; color: var(--muted); font-size: 14px; }
.text-link { border-bottom: 1px solid var(--blue); padding: 0 0 8px; font-size: 12px; }
.content-section { padding-block: 74px; border-top: 1px solid var(--line); }
.section-heading { display: flex; align-items: baseline; gap: 22px; margin-bottom: 24px; }
.section-heading .eyebrow { min-width: 125px; }
h2 { margin: 0; font-size: clamp(25px, 4vw, 38px); letter-spacing: .04em; }
.feature-panel, .status-panel { position: relative; background: var(--panel); border: 1px solid var(--line); padding: 32px; min-height: 120px; }
.feature-panel p, .status-panel p { color: #b6c0ce; line-height: 1.8; font-size: 14px; }
.panel-index { position: absolute; right: 24px; bottom: 18px; color: #526174; font-size: 10px; letter-spacing: .12em; }
.status-panel { display: flex; align-items: flex-start; gap: 18px; }
.status-dot { flex: 0 0 9px; height: 9px; margin-top: 7px; background: var(--blue); border-radius: 50%; }
.status-label { margin: 0; color: var(--blue) !important; font-size: 10px !important; }
.status-panel h3 { margin: 8px 0; font-size: 21px; }
.status-panel .muted { margin-bottom: 0; color: var(--muted); }
.site-footer { display: flex; justify-content: space-between; gap: 20px; padding-block: 28px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; }
@media (max-width: 700px) {
  .site-header { height: 64px; }
  .menu-toggle { display: block; color: var(--text); background: transparent; border: 1px solid var(--line); padding: 8px 12px; }
  .site-nav { display: none; position: absolute; top: 63px; left: 0; right: 0; padding: 18px 24px; background: #0b1017; border-bottom: 1px solid var(--line); flex-direction: column; align-items: flex-start; gap: 18px; }
  .site-nav.is-open { display: flex; }
  .hero { min-height: 560px; }
  .section-heading { display: block; }
  .section-heading .eyebrow { margin-bottom: 10px; }
  .feature-panel, .status-panel { padding: 22px; }
  .site-footer { flex-direction: column; }
}