:root {
  --bg: #0f0e0d;
  --ink: #f0eee6;
  --muted: #9b978d;
  --coral: #d97757;
  --coral2: #eba584;
  --green: #7ec48a;
  --red: #e57373;
  --blue: #8fb4ea;
  --yellow: #e5c07b;
  --line: #34312d;
  --panel: #1a1917;
  --mono: "JetBrains Mono", "Cascadia Code", "SF Mono", Consolas, "Microsoft YaHei", monospace;
  --sans: "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --serif: "Tiempos Headline", Georgia, "Songti SC", "STSong", "SimSun", serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: #000; overflow: hidden; color: var(--ink); font-family: var(--sans); }
body.idle { cursor: none; }

#viewport { position: fixed; inset: 0; overflow: hidden; background: #000; }
#stage {
  position: absolute; left: 50%; top: 50%;
  width: 1920px; height: 1080px;
  transform-origin: 50% 50%;
  background: var(--bg); overflow: hidden;
}
#bg { position: absolute; inset: 0; width: 1920px; height: 1080px; }
.dots {
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(240, 238, 230, .09) 1.2px, transparent 1.2px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse at center, #000 20%, transparent 75%);
  mask-image: radial-gradient(ellipse at center, #000 20%, transparent 75%);
}
.vignette {
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, .55) 100%);
}
.hud {
  position: absolute; left: 60px; right: 60px; top: 34px;
  display: flex; justify-content: space-between;
  font: 16px var(--mono); letter-spacing: 3px; color: var(--muted); opacity: .6;
}

/* ---------- 场景通用 ---------- */
.scene { position: absolute; inset: 0; display: none; transform-origin: 50% 50%; }
.col, .node, .term, .feat { position: absolute; }
.center-head { position: absolute; left: 0; right: 0; text-align: center; }
svg [data-in] { transform-box: fill-box; transform-origin: center; }

.chip {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 8px 20px; border-radius: 999px;
  border: 1px solid rgba(217, 119, 87, .5); background: rgba(217, 119, 87, .08);
  color: var(--coral2); font: 500 24px var(--mono);
}
.chip::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--coral); box-shadow: 0 0 12px var(--coral); }
.hd { font-size: 76px; font-weight: 700; margin: 24px 0 18px; line-height: 1.15; letter-spacing: 1px; }
.hd em, .c-coral { font-style: normal; color: var(--coral); }
.sub { font-size: 30px; color: var(--muted); margin: 0; line-height: 1.55; }
.c-muted { color: var(--muted); }
.c-green { color: var(--green); }
.c-red { color: var(--red); }
.c-blue { color: var(--blue); }
.c-yellow { color: var(--yellow); }

.caret { display: inline-block; width: .55em; height: 1.05em; background: var(--coral); vertical-align: -.14em; margin-left: 6px; }
.typing::after { content: ""; display: inline-block; width: .55em; height: 1.05em; background: var(--coral); vertical-align: -.14em; margin-left: 4px; }

/* ---------- 终端 ---------- */
.term {
  background: linear-gradient(#1d1c1a, #151412);
  border: 1px solid var(--line); border-radius: 18px; overflow: hidden;
  box-shadow: 0 40px 100px rgba(0, 0, 0, .55), 0 0 80px rgba(217, 119, 87, .06);
}
.term-bar { height: 48px; display: flex; align-items: center; gap: 10px; padding: 0 20px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .02); }
.term-bar i { width: 14px; height: 14px; border-radius: 50%; background: #ff5f57; }
.term-bar i:nth-child(2) { background: #febc2e; }
.term-bar i:nth-child(3) { background: #28c840; }
.term-bar span { margin-left: 14px; font: 18px var(--mono); color: var(--muted); }
.term-body { padding: 26px 32px; font: 24px/1.65 var(--mono); }
.term-body.small { font-size: 22px; padding: 20px 32px; }
.ln { white-space: pre; }
.ln.del, .ln.add { border-radius: 6px; margin: 2px 0; }
.ln.del { background: rgba(229, 115, 115, .13); color: #f2a7a7; }
.ln.add { background: rgba(126, 196, 138, .13); color: #aee3b8; }
.welcome { border: 1px solid rgba(217, 119, 87, .6); border-radius: 12px; padding: 14px 22px; margin-bottom: 18px; }

.tags { margin-top: 36px; }
.tags span { display: inline-block; padding: 10px 24px; margin: 0 12px 12px 0; border: 1px solid var(--line); border-radius: 12px; font: 24px var(--mono); background: var(--panel); }

/* ---------- 卡片 / 连线 ---------- */
.card {
  width: 100%; height: 100%;
  display: flex; align-items: center; gap: 20px; padding: 0 26px;
  background: rgba(26, 25, 23, .94); border: 1px solid var(--line); border-radius: 20px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, .45);
}
.card b { display: block; font-size: 30px; }
.card small { display: block; font-size: 20px; color: var(--muted); margin-top: 6px; }
.card.eco { flex-direction: column; align-items: flex-start; justify-content: center; gap: 2px; }
.card.eco small { margin-top: 2px; }
.eco-date { font: 18px var(--mono); color: var(--coral2); }
.ico { flex: none; width: 68px; height: 68px; border-radius: 16px; display: grid; place-items: center; font: 700 22px var(--mono); color: #fff; }
.hub-card {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center; gap: 22px;
  border-radius: 26px; border: 2px solid var(--coral);
  background: linear-gradient(135deg, #2c1d16, #191513);
  box-shadow: 0 0 70px rgba(217, 119, 87, .38), 0 30px 80px rgba(0, 0, 0, .5);
  font: 700 46px var(--sans);
}
.hub-card.small { font-size: 38px; }
.hub-card .glyph { font: 700 50px var(--mono); color: var(--coral); }
.links { position: absolute; inset: 0; width: 1920px; height: 1080px; pointer-events: none; }
.links line { stroke: rgba(217, 119, 87, .55); stroke-width: 2.5; }
.links .pulse { fill: #f7c2a6; }
.ring { fill: none; stroke: rgba(217, 119, 87, .35); stroke-width: 2; stroke-dasharray: 4 12; }
.ring2 { stroke: rgba(240, 238, 230, .14); stroke-dasharray: 2 16; }

/* ---------- 开场 / 尾声 ---------- */
.intro-glow {
  position: absolute; left: 560px; top: -80px; width: 800px; height: 800px; border-radius: 50%;
  background: radial-gradient(circle, rgba(217, 119, 87, .36), transparent 62%);
  opacity: 0;
}
.spark { position: absolute; left: 810px; top: 170px; width: 300px; height: 300px; overflow: visible; filter: drop-shadow(0 0 28px rgba(217, 119, 87, .55)); }
.intro-prompt { position: absolute; left: 0; right: 0; top: 500px; text-align: center; font: 500 60px var(--mono); }
.wordmark { position: absolute; left: 0; right: 0; top: 520px; margin: 0; text-align: center; font: 400 168px/1 var(--serif); letter-spacing: -2px; }
.intro-sub { position: absolute; left: 0; right: 0; top: 735px; margin: 0; text-align: center; font: 500 36px var(--mono); color: var(--coral2); letter-spacing: 6px; }
.intro-sub2 { position: absolute; left: 0; right: 0; top: 805px; margin: 0; text-align: center; font-size: 30px; color: var(--muted); }
.outro-line { position: absolute; left: 0; right: 0; margin: 0; text-align: center; font: 400 84px/1.2 var(--serif); }
.wordmark2 {
  position: absolute; left: 0; right: 0; top: 690px; margin: 0; text-align: center;
  font: 700 110px/1 var(--sans); letter-spacing: -1px;
  background: linear-gradient(90deg, #f0eee6, #eba584 55%, #d97757); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.cmd-wrap { position: absolute; left: 0; right: 0; top: 835px; text-align: center; }
.cmd { display: inline-block; padding: 16px 32px; border-radius: 14px; background: var(--panel); border: 1px solid var(--line); font: 32px var(--mono); }
.credits { position: absolute; left: 0; right: 0; top: 945px; margin: 0; text-align: center; font-size: 18px; color: var(--muted); letter-spacing: 1px; }

/* ---------- 里程碑 ---------- */
.big-count { margin-top: 30px; font: 700 108px/1 var(--mono); color: var(--coral); letter-spacing: -3px; text-shadow: 0 0 40px rgba(217, 119, 87, .35); }
.big-count + .sub { margin-top: 26px; }
.chart { position: absolute; left: 1040px; top: 170px; width: 780px; height: 580px; overflow: visible; }
.axis { stroke: #3a3733; stroke-width: 2; }
.axis-t { fill: var(--muted); font: 20px var(--mono); }
.peak-t { fill: var(--coral2); font: 700 36px var(--mono); }
.curve { fill: none; stroke: var(--coral); stroke-width: 5; stroke-linecap: round; filter: drop-shadow(0 0 10px rgba(217, 119, 87, .8)); }
.dot-glow { fill: #fff; stroke: var(--coral); stroke-width: 5; filter: drop-shadow(0 0 14px var(--coral)); }
.events { position: absolute; left: 120px; top: 800px; display: flex; gap: 28px; }
.event { width: 530px; padding: 22px 28px; border-radius: 18px; background: var(--panel); border: 1px solid var(--line); }
.event .d { font: 20px var(--mono); color: var(--coral2); }
.event b { display: block; font-size: 32px; margin-top: 6px; }

/* ---------- 智能体团队 ---------- */
.stat { margin-top: 30px; display: flex; align-items: baseline; gap: 18px; }
.stat b { flex: none; width: 290px; font: 700 50px var(--mono); color: var(--coral); white-space: nowrap; }
.stat span { font-size: 24px; color: var(--muted); white-space: nowrap; }
#grid { position: absolute; left: 800px; top: 140px; width: 1020px; display: grid; grid-template-columns: repeat(4, 240px); gap: 20px; }
.pane {
  height: 185px; padding: 12px 14px; display: flex; flex-direction: column; overflow: hidden;
  background: rgba(22, 21, 19, .95); border: 1px solid var(--line); border-radius: 14px;
  font: 14px/1.6 var(--mono);
  transition: border-color .4s, box-shadow .4s;
}
.pane-h { display: flex; justify-content: space-between; color: var(--coral2); margin-bottom: 6px; }
.pane-l { white-space: pre; overflow: hidden; color: #cfcbc1; }
.pane-l:nth-child(odd) { color: #8f8b82; }
.pane-bar { margin-top: auto; height: 6px; border-radius: 3px; background: #2a2825; overflow: hidden; }
.pane-bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--coral), #f0b08f); }
.pane.done { border-color: rgba(126, 196, 138, .6); box-shadow: 0 0 24px rgba(126, 196, 138, .12); }
.pane.done .pane-bar i { background: var(--green); }
.pane.done .pst { color: var(--green); }

/* ---------- 自主 ---------- */
.av { padding-top: 14px; padding-bottom: 14px; }
.av-row { display: grid; grid-template-columns: 28px 270px 150px 1fr 140px; align-items: center; padding: 11px 0; border-bottom: 1px dashed #2c2a27; font-size: 22px; }
.av-row:last-child { border-bottom: none; }
.av-row .dot { width: 14px; height: 14px; border-radius: 50%; background: var(--muted); }
.av-row .m { color: var(--muted); }
.av-row .st { justify-self: end; padding: 3px 12px; border-radius: 8px; font-size: 18px; }
.av-row.run .dot { background: var(--coral); box-shadow: 0 0 10px var(--coral); animation: blink 1s infinite alternate; }
.av-row.run .st { color: var(--coral2); background: rgba(217, 119, 87, .14); }
.av-row.wait .dot { background: var(--yellow); box-shadow: 0 0 10px var(--yellow); }
.av-row.wait .st { color: var(--yellow); background: rgba(229, 192, 123, .14); }
.av-row.done .dot { background: var(--green); }
.av-row.done .st { color: var(--green); background: rgba(126, 196, 138, .14); }
.av-row.sched .dot { background: var(--blue); }
.av-row.sched .st { color: var(--blue); background: rgba(143, 180, 234, .14); }
@keyframes blink { to { opacity: .35; } }
.feat { left: 1260px; width: 560px; height: 124px; padding: 16px 26px; border-radius: 18px; background: var(--panel); border: 1px solid var(--line); }
.feat .d { font: 18px var(--mono); color: var(--coral2); }
.feat b { display: block; font-size: 28px; margin: 2px 0; }
.feat small { font-size: 20px; color: var(--muted); }

/* ---------- 模型演进 ---------- */
.track { position: absolute; left: 0; top: 0; width: 3520px; height: 1080px; will-change: transform; }
.river { position: absolute; left: 0; top: 0; overflow: visible; }
.river-base { fill: none; stroke: #2e2b28; stroke-width: 3; stroke-dasharray: 6 10; }
.river-line { fill: none; stroke: var(--coral); stroke-width: 5; stroke-linecap: round; filter: drop-shadow(0 0 10px rgba(217, 119, 87, .8)); }
.year { position: absolute; top: 840px; font: 700 220px/1 var(--serif); color: transparent; -webkit-text-stroke: 1.5px rgba(240, 238, 230, .09); }
.mnode { position: absolute; width: 0; height: 0; }
.mnode .d2 { position: absolute; left: -12px; top: -12px; width: 24px; height: 24px; border-radius: 50%; border: 3px solid #55514b; background: var(--bg); transition: all .45s; }
.mnode .lab { position: absolute; left: -160px; width: 320px; text-align: center; opacity: .3; transition: opacity .45s, transform .45s; }
.mnode.up .lab { bottom: 30px; transform: translateY(10px); }
.mnode.down .lab { top: 30px; transform: translateY(-10px); }
.mnode .lab b { display: block; font-size: 28px; white-space: nowrap; }
.mnode .lab span { font: 20px var(--mono); color: var(--muted); }
.mnode .lab em { display: block; font-style: normal; font-size: 19px; color: var(--coral2); margin-top: 2px; }
.mnode.lit .d2 { border-color: var(--coral); background: var(--coral); box-shadow: 0 0 0 8px rgba(217, 119, 87, .18), 0 0 30px var(--coral); }
.mnode.lit .lab { opacity: 1; transform: none; }
.mnode.star .d2 { width: 36px; height: 36px; left: -18px; top: -18px; }
.mnode.star .lab b { font-size: 38px; color: var(--coral); }

/* ---------- Opus 5.5 ---------- */
.opus-title {
  margin: 26px 0 22px; font: 400 156px/1.05 var(--serif); letter-spacing: -2px;
  background: linear-gradient(90deg, #f0eee6 10%, #eba584 60%, #d97757); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stats4 { position: absolute; left: 120px; top: 560px; display: grid; grid-template-columns: repeat(4, 390px); gap: 30px; }
.scard { height: 220px; padding: 30px 32px; border-radius: 24px; background: linear-gradient(160deg, rgba(217, 119, 87, .16), rgba(26, 25, 23, .92) 60%); border: 1px solid rgba(217, 119, 87, .35); }
.scard b { display: block; font: 700 84px/1 var(--mono); }
.scard span { display: block; margin-top: 20px; font-size: 22px; color: var(--muted); line-height: 1.45; }
.quote { position: absolute; left: 120px; top: 840px; width: 1680px; padding-left: 30px; border-left: 4px solid var(--coral); font-size: 30px; line-height: 1.6; color: #d8d4ca; }
.quote small { display: block; margin-top: 10px; font-size: 22px; color: var(--muted); }

/* ---------- 开场遮罩 ---------- */
#start {
  position: fixed; inset: 0; z-index: 20; display: grid; place-items: center;
  background: radial-gradient(ellipse at center, rgba(40, 24, 18, .75), rgba(8, 7, 6, .92));
  backdrop-filter: blur(6px); transition: opacity .6s;
}
#start.hide { opacity: 0; pointer-events: none; }
.start-box { text-align: center; padding: 24px; }
.start-kicker { font: 14px var(--mono); letter-spacing: 6px; color: var(--coral2); }
.start-box h1 { margin: 14px 0 10px; font: 400 clamp(32px, 7vw, 88px)/1.1 var(--serif); }
.start-box p { margin: 0; color: var(--muted); font-size: 16px; }
#startBtn {
  margin: 34px 0 22px; padding: 16px 40px; border: none; border-radius: 999px; cursor: pointer;
  background: var(--coral); color: #1a0f0a; font: 700 20px var(--sans);
  box-shadow: 0 0 40px rgba(217, 119, 87, .5); transition: transform .15s, box-shadow .2s;
}
#startBtn:hover { transform: scale(1.05); box-shadow: 0 0 60px rgba(217, 119, 87, .7); }
.start-hint { font-size: 13px !important; opacity: .8; }
.rotate-hint { display: none; margin-top: 10px !important; color: var(--coral2) !important; font-size: 14px !important; }
@media (orientation: portrait) {
  .rotate-hint { display: block; }
}

/* ---------- 播放控制条 ---------- */
#ui {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
  padding: 26px 28px 16px; background: linear-gradient(transparent, rgba(0, 0, 0, .8));
  opacity: 0; transition: opacity .3s;
}
#ui.show { opacity: 1; }
.bar { position: relative; height: 6px; margin-bottom: 14px; border-radius: 3px; background: rgba(255, 255, 255, .2); cursor: pointer; touch-action: none; }
.bar:hover, .bar:focus-visible { height: 8px; }
.fill { position: absolute; left: 0; top: 0; bottom: 0; border-radius: 3px; background: var(--coral); }
.knob { position: absolute; top: 50%; width: 14px; height: 14px; margin: -7px 0 0 -7px; border-radius: 50%; background: #fff; box-shadow: 0 0 10px rgba(217, 119, 87, .8); }
#marks .mark { position: absolute; top: -3px; bottom: -3px; width: 2px; background: rgba(255, 255, 255, .45); }
.row { display: flex; align-items: center; gap: 12px; color: #ddd; font: 14px var(--sans); }
.row button {
  height: 36px; min-width: 40px; padding: 0 14px; cursor: pointer;
  border-radius: 10px; border: 1px solid rgba(255, 255, 255, .16); background: rgba(255, 255, 255, .08);
  color: #fff; font: 14px var(--sans);
}
.row button:hover { background: rgba(255, 255, 255, .16); }
button:focus-visible, .bar:focus-visible { outline: 2px solid var(--coral); outline-offset: 3px; }
#time { font-family: var(--mono); color: #bbb; }
#chapter { color: var(--coral2); }
.sp { flex: 1; }