:root {
  --bg: #071512;
  --surface: #102722;
  --surface-raised: #163831;
  --border: rgb(111 155 142 / 28%);
  --border-soft: rgb(111 155 142 / 16%);
  --text: #edf3ed;
  --muted: #a7beb4;
  --subtle: #7f998e;
  --accent: #f1a62b;
  --accent-strong: #ffc15a;
  --success: #52c59d;
  --radius: 0;
  --sans: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: Consolas, "SFMono-Regular", monospace;
}

* { box-sizing: border-box; }
html { background: var(--bg); scroll-behavior: smooth; }
body { min-width: 0; margin: 0; overflow-x: hidden; color: var(--text); background: radial-gradient(circle at 88% 0, rgb(35 152 128 / 16%), transparent 31rem), linear-gradient(180deg, #091b17 0, var(--bg) 48rem); font-family: var(--sans); font-size: 14px; }
button { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid var(--accent-strong); outline-offset: 3px; }

.tour-shell { width: 100%; max-width: 1480px; margin: 0 auto; padding: 30px clamp(22px, 3vw, 52px) 64px; }
.page-header { display: flex; align-items: end; justify-content: space-between; gap: 30px; }
.eyebrow { margin: 0 0 11px; color: var(--accent-strong); font: 600 12px/1.25 var(--mono); letter-spacing: .12em; }
h1, h2, p { margin-top: 0; }
h1, h2 { margin-bottom: 0; font-weight: 540; letter-spacing: -.03em; }
h1 { font-size: clamp(30px, 3vw, 44px); }
.intro, .intro-section > p { max-width: 760px; margin: 13px 0 0; color: var(--muted); font-size: 15px; line-height: 1.8; }
.live-status { display: inline-flex; align-items: center; gap: 9px; flex: none; padding: 11px 13px; border: 1px solid rgb(241 166 43 / 38%); color: var(--accent-strong); font: 600 12px/1 var(--mono); letter-spacing: .07em; }
.live-status span { width: 7px; height: 7px; background: var(--success); }

.section-nav { display: flex; margin-top: 28px; overflow-x: auto; border-bottom: 1px solid var(--border); background: rgb(8 24 20 / 78%); scrollbar-width: thin; }
.section-nav a { min-height: 50px; padding: 0 18px; border-bottom: 3px solid transparent; color: var(--muted); font-size: 14px; line-height: 47px; text-decoration: none; white-space: nowrap; }
.section-nav a:hover, .section-nav a[aria-current="page"] { border-bottom-color: var(--accent); background: rgb(22 56 49 / 80%); color: var(--text); }
.section-nav a:active { transform: translateY(1px); }

.intro-section { max-width: 980px; margin: 36px 0 28px; }
.intro-section h2 { font-size: clamp(34px, 3.8vw, 56px); line-height: 1.1; }
.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.metric-card { min-width: 0; padding: 19px; border: 1px solid var(--border); background: linear-gradient(180deg, rgb(17 43 38 / 96%), rgb(9 27 23 / 96%)); }
.metric-card span, .metric-card em { display: block; color: var(--muted); font-size: 12px; font-style: normal; }
.metric-card strong { display: block; margin-top: 12px; color: var(--accent-strong); font: 540 clamp(24px, 2.4vw, 34px)/1.1 var(--mono); }
.metric-card em { margin-top: 8px; color: var(--subtle); }

.panel { margin-top: 22px; padding: clamp(22px, 2.1vw, 30px); border: 1px solid var(--border); background: rgb(11 29 25 / 90%); }
.panel-heading { display: flex; align-items: start; justify-content: space-between; gap: 22px; margin-bottom: 21px; }
.panel h2 { font-size: clamp(24px, 2.4vw, 36px); }
.button { min-height: 44px; padding: 0 17px; border: 1px solid var(--border); color: var(--text); cursor: pointer; }
.button-secondary { background: rgb(22 56 49 / 86%); }
.button:hover { border-color: rgb(241 166 43 / 55%); background: var(--surface-raised); }
.button:active { transform: translateY(1px); }

.event-list { display: grid; gap: 1px; border: 1px solid var(--border); background: var(--border); }
.event-row { display: grid; grid-template-columns: 78px minmax(0, 1fr) auto; gap: 18px; align-items: center; padding: 17px 18px; background: rgb(16 39 34 / 92%); }
.event-row time, .timeline time { color: var(--accent); font: 500 13px/1 var(--mono); }
.event-row b, .timeline b { display: block; font-size: 14px; }
.event-row span:not(.tag) { display: block; margin-top: 5px; color: var(--muted); font-size: 13px; }
.tag { display: inline-flex; min-height: 28px; align-items: center; justify-content: center; padding: 0 9px; border: 1px solid var(--border); background: rgb(82 197 157 / 8%); color: #95dfc5; font-size: 12px; white-space: nowrap; }
.tag-success { color: #95dfc5; }
.tag-warning { background: rgb(241 166 43 / 9%); color: var(--accent-strong); }
.tag-muted { background: transparent; color: var(--muted); }

.split-panel { display: grid; grid-template-columns: minmax(280px, .82fr) minmax(420px, 1.18fr); gap: 30px; }
.body-copy { max-width: 40rem; margin: 13px 0 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.attention-note { margin-top: 24px; padding: 14px 16px; border-left: 2px solid var(--accent); background: rgb(241 166 43 / 7%); color: var(--muted); font-size: 14px; line-height: 1.75; }
.timeline { display: grid; gap: 1px; padding: 18px 18px 18px 30px; border: 1px solid var(--border); background: var(--border); }
.timeline article { position: relative; padding: 0 0 24px 24px; border-left: 1px solid var(--border); background: var(--surface); }
.timeline article:last-child { padding-bottom: 0; }
.timeline article::before { position: absolute; top: 3px; left: -5px; width: 9px; height: 9px; background: var(--success); content: ""; }
.timeline b { margin-top: 9px; }
.timeline p { margin: 6px 0 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.caption { color: var(--subtle); font: 12px/1 var(--mono); }

.table-wrap { overflow-x: auto; }
table { width: 100%; min-width: 760px; border-collapse: collapse; }
th, td { padding: 15px 13px; border-bottom: 1px solid var(--border-soft); text-align: left; font-size: 13px; }
th { color: var(--muted); font-weight: 600; white-space: nowrap; }
tbody tr:hover { background: rgb(22 56 49 / 48%); }

@media (max-width: 980px) {
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split-panel { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .tour-shell { padding: 22px 16px 44px; }
  .page-header, .panel-heading { display: grid; align-items: start; }
  .intro-section { margin: 30px 0 24px; }
  .metric-grid { grid-template-columns: 1fr; }
  .panel { padding: 20px; }
  .event-row { grid-template-columns: 62px minmax(0, 1fr); }
  .event-row .tag { grid-column: 2; justify-self: start; }
}