:root {
  --navy: #13233f;
  --ink: #18243a;
  --blue: #2e6782;
  --cyan: #74c9d5;
  --gold: #c99537;
  --paper: #f5f7fa;
  --line: #d8e0e8;
  --muted: #657186;
}

* { box-sizing: border-box; }

html {
  color-scheme: light;
  background: var(--paper);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 18%, rgba(116, 201, 213, .18), transparent 25rem),
    linear-gradient(135deg, #f8fafc 0%, #eef3f7 100%);
}

a { color: inherit; }

.page {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
  padding: 30px 0 26px;
}

.masthead,
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.masthead {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  font-weight: 650;
  letter-spacing: .06em;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 12px;
  color: white;
  background: var(--navy);
  font-family: "Songti SC", "STSong", serif;
  font-size: 21px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.12);
}

.domain {
  color: var(--muted);
  font: 12px/1.4 "SFMono-Regular", Consolas, monospace;
  letter-spacing: .08em;
}

.panel {
  position: relative;
  min-height: 640px;
  margin-top: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255,255,255,.94);
  box-shadow: 0 28px 80px rgba(19,35,63,.09);
}

.route-map {
  position: absolute;
  inset: 0 0 auto auto;
  width: min(44vw, 520px);
  height: 290px;
  opacity: .72;
  pointer-events: none;
}

.route-map::before,
.route-map::after {
  position: absolute;
  content: "";
  border: 1px solid rgba(46,103,130,.22);
  border-radius: 50%;
}

.route-map::before { width: 330px; height: 330px; top: -190px; right: 28px; }
.route-map::after { width: 210px; height: 210px; top: -84px; right: -54px; }

.node,
.node::after {
  position: absolute;
  display: block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 7px rgba(116,201,213,.12);
  content: "";
}

.node.one { top: 72px; right: 185px; }
.node.two { top: 145px; right: 78px; background: var(--gold); }
.node.three { top: 215px; right: 248px; }

.content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 640px;
  padding: clamp(42px, 7vw, 86px);
}

.eyebrow {
  margin: 0;
  color: var(--blue);
  font-size: 13px;
  font-weight: 650;
  letter-spacing: .18em;
}

h1 {
  max-width: 790px;
  margin: 28px 0 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -.04em;
}

.summary {
  max-width: 660px;
  margin: 28px 0 0;
  color: #46566d;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.9;
}

.facts {
  display: grid;
  grid-template-columns: 1.15fr .9fr 1.35fr;
  align-self: end;
  margin-top: 76px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.fact { padding: 23px 24px 22px 0; }
.fact + .fact { padding-left: 24px; border-left: 1px solid var(--line); }
.fact-label { display: block; margin-bottom: 12px; color: var(--muted); font: 11px/1.3 "SFMono-Regular", Consolas, monospace; letter-spacing: .12em; text-transform: uppercase; }
.fact-value { font-size: 15px; font-weight: 650; line-height: 1.6; overflow-wrap: anywhere; }

.notice { max-width: 790px; margin: 30px 0 0; color: var(--muted); font-size: 13px; line-height: 1.8; }
.footer { padding-top: 21px; color: var(--muted); font-size: 12px; }
.footer a { text-underline-offset: 4px; }
.footer a:focus-visible { outline: 2px solid var(--cyan); outline-offset: 5px; }

@media (max-width: 720px) {
  .page { width: 100%; padding: 14px 12px 24px; }
  .masthead { padding: 6px 4px 17px; }
  .brand { min-width: 0; font-size: 14px; }
  .domain { display: none; }
  .panel { min-height: 0; margin-top: 14px; border-radius: 18px; }
  .route-map { width: 82vw; opacity: .45; }
  .content { min-height: 600px; padding: 42px 24px 30px; }
  h1 { font-size: clamp(38px, 12vw, 54px); }
  .summary { font-size: 17px; }
  .facts { grid-template-columns: 1fr; margin-top: 48px; }
  .fact { padding: 18px 0; }
  .fact + .fact { padding-left: 0; border-top: 1px solid var(--line); border-left: 0; }
  .footer { align-items: flex-start; padding: 18px 4px 0; flex-direction: column; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }