/* ============================================================
   LAYOUT  一条贯穿八十年的发光赛道，垂直脊线承载全部编年史
   TYPE    窄体 DIN 系做展示，系统中文字体做正文，等宽体做数据
   COLOR   深空底 + 青蓝主光，时间轴从琥珀（过去）渐变到青（现在）
   ============================================================ */
:root{
  color-scheme: dark;
  --bg:#05070c; --bg2:#070b13; --surface:#0a1019; --surface2:#0e1621;
  --fg:#e9f0f8; --fg2:#bcc8d8; --muted:#7f8da2;
  --line:rgba(150,180,215,.13); --line2:rgba(120,200,255,.30);
  --cyan:#5fe3ff; --cyan-ink:#04141a; --violet:#a08cff; --amber:#ffb45e;
  --rose:#ff6f9c; --good:#4fe0a5;
  --glow:rgba(95,227,255,.26);
  --grad-text:linear-gradient(100deg,#e9f0f8 0%,#5fe3ff 52%,#a08cff 100%);
  --grad-track:linear-gradient(180deg,#ffb45e 0%,#ff8f86 26%,#ff6f9c 40%,#a08cff 68%,#5fe3ff 100%);
  --font-display:"Bahnschrift","DIN Alternate","HarmonyOS Sans SC","Microsoft YaHei","PingFang SC",sans-serif;
  --font-body:"Inter","HarmonyOS Sans SC","Microsoft YaHei","PingFang SC","Noto Sans SC",system-ui,sans-serif;
  --font-serif:"Source Han Serif SC","Noto Serif SC","Songti SC","SimSun",serif;
  --font-mono:"Cascadia Code","JetBrains Mono","SF Mono",Consolas,monospace;
  --shell:1160px; --rail:108px;
}
:root[data-theme="light"]{
  color-scheme: light;
  --bg:#f2f5f9; --bg2:#e8eef6; --surface:#ffffff; --surface2:#f6f9fc;
  --fg:#0a1420; --fg2:#33455b; --muted:#5c6c81;
  --line:rgba(18,45,75,.13); --line2:rgba(0,90,125,.35);
  --cyan:#007e9e; --cyan-ink:#ffffff; --violet:#5b49d8; --amber:#a86700;
  --rose:#c3305c; --good:#0a7a52;
  --glow:rgba(0,126,158,.16);
  --grad-text:linear-gradient(100deg,#0a1420 0%,#007e9e 52%,#5b49d8 100%);
  --grad-track:linear-gradient(180deg,#a86700 0%,#c3305c 40%,#5b49d8 68%,#007e9e 100%);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

@view-transition{navigation:auto}
::view-transition-old(root){animation:vtOut .22s ease both}
::view-transition-new(root){animation:vtIn .34s ease both}
@keyframes vtOut{to{opacity:0;transform:translateY(-10px)}}
@keyframes vtIn{from{opacity:0;transform:translateY(12px)}}
body{
  margin:0;background:var(--bg);color:var(--fg);
  font-family:var(--font-body);font-size:16px;line-height:1.78;
  overflow-x:hidden;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
body::before{
  content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);
  z-index:70;background:var(--bg);pointer-events:none;
}
body::after{
  content:"";position:fixed;inset:0;z-index:2;pointer-events:none;opacity:.045;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.6'/%3E%3C/svg%3E");
}
img{max-width:100%}
[hidden]{display:none!important}
a{color:inherit}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.2;margin:0}
p{margin:0}
button{font-family:inherit}
::selection{background:color-mix(in srgb,var(--cyan) 30%,transparent);color:var(--fg)}
.skip{position:absolute;left:-9999px;top:0;padding:.6rem 1rem;background:var(--cyan);color:var(--cyan-ink);z-index:200;border-radius:0 0 8px 0}
.skip:focus{left:0}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

.wrap{
  width:100%;max-width:calc(var(--shell) + 48px);margin-inline:auto;
  padding-inline:max(24px,env(safe-area-inset-left,0px)) max(24px,env(safe-area-inset-right,0px));
}
.sec{position:relative;padding-block:clamp(64px,9vw,116px);scroll-margin-top:78px}
.sec.alt{background:var(--bg2);border-block:1px solid var(--line)}
.sec .wrap{position:relative;z-index:1}
.sec-glow::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(52% 42% at 82% 0%,color-mix(in srgb,var(--violet) 9%,transparent),transparent 65%);
}
.sec-head{max-width:840px}
.kicker{
  display:flex;align-items:center;gap:.8rem;margin:0 0 .9rem;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan);
}
.kicker::before{content:"";width:26px;height:1px;background:var(--cyan);box-shadow:0 0 8px var(--glow)}
h2{font-size:clamp(1.9rem,1.3rem + 3vw,3.3rem);letter-spacing:-.02em;line-height:1.14;text-wrap:balance}
h2 em{font-style:normal;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{margin:1.1rem 0 0;max-width:64ch;color:var(--fg2);font-size:clamp(.98rem,.94rem+.3vw,1.1rem)}
h3{font-size:clamp(1.05rem,1rem+.4vw,1.28rem);letter-spacing:-.01em}

/* ---------- top bar ---------- */
.progress{position:fixed;top:0;left:0;right:0;height:2px;z-index:80;pointer-events:none;background:color-mix(in srgb,var(--line) 50%,transparent)}
.progress span{display:block;height:100%;transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--amber),var(--rose) 45%,var(--cyan));will-change:transform}
.topbar{
  position:fixed;top:env(safe-area-inset-top,0px);left:0;right:0;z-index:60;
  display:flex;align-items:center;gap:22px;height:62px;
  padding-inline:max(20px,env(safe-area-inset-left,0px)) max(20px,env(safe-area-inset-right,0px));
  background:color-mix(in srgb,var(--bg) 80%,transparent);
  -webkit-backdrop-filter:blur(16px) saturate(1.2);backdrop-filter:blur(16px) saturate(1.2);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;white-space:nowrap;font-family:var(--font-display);font-weight:650;letter-spacing:.02em}
.brand .mark{
  width:27px;height:27px;border-radius:8px;display:grid;place-items:center;
  background:color-mix(in srgb,var(--cyan) 13%,transparent);border:1px solid var(--line2);
  color:var(--cyan);font-family:var(--font-mono);font-size:.6rem;letter-spacing:0;
}
.brand small{font-family:var(--font-mono);font-size:.62rem;color:var(--muted);letter-spacing:.06em;font-weight:400}
.nav{margin-left:auto;display:flex;align-items:center;gap:2px}
.nav a{position:relative;display:block;padding:.45rem .6rem;border-radius:8px;text-decoration:none;color:var(--muted);font-size:.82rem;transition:color .2s}
.nav a:hover{color:var(--fg)}
.nav a[aria-current="true"]{color:var(--fg)}
.nav a[aria-current="true"]::after{content:"";position:absolute;left:.6rem;right:.6rem;bottom:.1rem;height:2px;border-radius:2px;background:var(--cyan);box-shadow:0 0 10px var(--glow)}
.menu-btn{
  display:none;margin-left:auto;appearance:none;background:transparent;border:1px solid var(--line2);
  color:var(--fg);font-size:.8rem;padding:.42rem .72rem;border-radius:8px;cursor:pointer;
}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);isolation:isolate}
.hero-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0;display:block}
:root[data-theme="light"] .hero-canvas{filter:contrast(1.3) saturate(1.25)}
.hero::before{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    radial-gradient(65% 55% at 28% 32%,color-mix(in srgb,var(--cyan) 10%,transparent),transparent 70%),
    radial-gradient(45% 45% at 88% 18%,color-mix(in srgb,var(--violet) 8%,transparent),transparent 70%),
    linear-gradient(180deg,transparent 58%,var(--bg) 100%);
}
.hero .wrap{position:relative;z-index:2;padding-block:clamp(108px,15vh,166px) clamp(52px,7vh,80px)}
.hero-inner{max-width:900px}
.eyebrow{display:inline-flex;align-items:center;gap:.65rem;margin:0 0 1.15rem;font-family:var(--font-mono);font-size:.71rem;letter-spacing:.17em;text-transform:uppercase;color:var(--cyan)}
.eyebrow::before{content:"";width:34px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent)}
.live-dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);animation:live 2.6s ease-out infinite}
@keyframes live{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--cyan) 45%,transparent)}70%{box-shadow:0 0 0 9px transparent}100%{box-shadow:0 0 0 0 transparent}}
.hero h1{margin:0;font-size:clamp(3rem,1.9rem + 7.2vw,7rem);line-height:.98;letter-spacing:-.035em;text-wrap:balance}
.hero h1 .l1{display:block;color:var(--fg)}
.hero h1 .l2{display:flex;align-items:baseline;gap:.3em;flex-wrap:wrap;margin-top:.02em}
.hero h1 .grad{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 34px var(--glow));background-size:220% 100%;animation:gradShift 9s ease-in-out infinite}
@keyframes gradShift{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.hero h1 .rest{font-size:.29em;font-weight:500;letter-spacing:.08em;color:var(--fg2);font-family:var(--font-body);white-space:nowrap}
.hero .lead{max-width:56ch;margin:1.55rem 0 0;color:var(--fg2);font-size:clamp(1rem,.94rem+.35vw,1.12rem);line-height:1.88}
.hero .lead strong{color:var(--fg);font-weight:600}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:1.9rem}
.btn{
  display:inline-flex;align-items:center;gap:.55rem;padding:.78rem 1.22rem;border-radius:999px;
  border:1px solid var(--line2);text-decoration:none;color:var(--fg);font-size:.9rem;
  transition:transform .2s,border-color .2s,color .2s,box-shadow .25s;
}
.btn:hover{transform:translateY(-2px)}
.btn.primary{background:var(--cyan);border-color:var(--cyan);color:var(--cyan-ink);font-weight:600}
.btn.primary:hover{box-shadow:0 0 30px var(--glow)}
.btn.ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn .arw{font-family:var(--font-mono);font-size:.95em}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;
  margin-top:clamp(2.3rem,6vh,3.8rem);border-block:1px solid var(--line);
}
.hstat{padding:1.05rem 1rem 1.05rem 0;min-width:0}
.hstat+.hstat{padding-left:1.2rem;border-left:1px solid var(--line)}
.hstat b{display:block;font-family:var(--font-mono);font-size:clamp(1.35rem,1.1rem+.9vw,1.85rem);font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums;line-height:1.25}
.hstat > span{display:block;margin-top:.22rem;font-size:.71rem;line-height:1.5;color:var(--muted)}
.hero .eyebrow,.hero h1,.hero .lead,.hero .cta-row,.hero-stats{animation:rise .85s cubic-bezier(.2,.7,.2,1) both}
.hero h1{animation-delay:.08s}.hero .lead{animation-delay:.2s}.hero .cta-row{animation-delay:.3s}.hero-stats{animation-delay:.4s}
@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}

/* ---------- ticker ---------- */
.ticker{position:relative;z-index:2;overflow:hidden;background:var(--bg2);border-bottom:1px solid var(--line);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent)}
.ticker-track{display:flex;width:max-content;animation:tick 78s linear infinite}
.ticker-track>div{display:flex}
.ticker span{font-family:var(--font-mono);font-size:.71rem;color:var(--muted);letter-spacing:.07em;white-space:nowrap;padding:.72rem 1.1rem;border-right:1px solid var(--line)}
.ticker b{color:var(--cyan);font-weight:500;margin-right:.45rem}
@keyframes tick{to{transform:translateX(-50%)}}

/* ---------- prologue ---------- */
.prose{max-width:66ch;color:var(--fg2);margin-top:1.4rem}
.prose p+p{margin-top:1rem}
.prose strong{color:var(--fg);font-weight:600}
.triad{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;
  margin-top:clamp(2rem,4vw,3rem);background:var(--line);border:1px solid var(--line);border-radius:16px;overflow:hidden;
}
.tri{background:var(--bg);padding:clamp(20px,3vw,28px);min-width:0}
.tri .ico{width:34px;height:34px;color:var(--cyan);margin-bottom:.9rem}
.tri .num{font-family:var(--font-mono);font-size:.65rem;letter-spacing:.14em;color:var(--muted)}
.tri b{display:block;margin:.3rem 0 .4rem;font-family:var(--font-display);font-size:1.08rem;color:var(--fg)}
.tri p{font-size:.86rem;color:var(--fg2);line-height:1.7}
.sec.alt .tri{background:var(--bg2)}
.tabs{display:inline-flex;gap:4px;padding:4px;margin-top:clamp(2rem,4vw,2.8rem);max-width:100%;overflow-x:auto;
  border:1px solid var(--line);border-radius:999px;background:var(--surface);scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{appearance:none;border:0;background:transparent;color:var(--muted);font-size:.86rem;padding:.52rem .95rem;border-radius:999px;cursor:pointer;white-space:nowrap;transition:background .2s,color .2s}
.tab:hover{color:var(--fg)}
.tab[aria-selected="true"]{background:var(--cyan);color:var(--cyan-ink);font-weight:600}
.paradigm{margin-top:16px;padding:clamp(22px,3.4vw,38px);border:1px solid var(--line);border-radius:18px;
  display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(24px,4vw,52px);
  background:linear-gradient(180deg,var(--surface),transparent)}
.creed{font-family:var(--font-serif);font-size:clamp(1.25rem,1rem + 1.2vw,1.68rem);line-height:1.62;color:var(--fg);margin:0}
.creed .qm{color:var(--cyan);font-family:var(--font-display);font-size:1.3em;line-height:0;vertical-align:-.08em;margin-right:.05em}
.ptag{margin-top:1.2rem;font-family:var(--font-mono);font-size:.66rem;letter-spacing:.14em;color:var(--muted)}
.pfacts{display:grid;grid-template-columns:auto minmax(0,1fr);gap:.6rem 1.1rem;margin:0;font-size:.9rem}
.pfacts dt{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.08em;color:var(--muted);padding-top:.18rem}
.pfacts dd{margin:0;color:var(--fg2)}
.pfacts dd b{color:var(--fg);font-weight:600}

/* ---------- timeline ---------- */
.tl{--rail:108px;position:relative;margin-top:clamp(2.4rem,5vw,3.6rem)}
.tl::before{content:"";position:absolute;left:var(--rail);top:4px;bottom:4px;width:1px;background:var(--grad-track);opacity:.55}
.era{position:relative;margin-top:clamp(2.2rem,5vw,3.4rem)}
.era:first-child{margin-top:0}
.era-head{padding-left:calc(var(--rail) + 32px);margin-bottom:.6rem}
.era-head h3{display:flex;flex-wrap:wrap;align-items:baseline;gap:.5rem 1rem;font-size:clamp(1.15rem,1rem+.6vw,1.45rem)}
.era-head .years{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.12em;color:var(--muted);font-weight:400}
.era-head p{margin:.32rem 0 0;font-size:.86rem;color:var(--muted)}
.era-head h3::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--tone);box-shadow:0 0 12px color-mix(in srgb,var(--tone) 60%,transparent);position:relative;top:-1px}
.event{
  position:relative;display:grid;grid-template-columns:var(--rail) minmax(0,1fr);column-gap:32px;
  padding-block:1.1rem;
}
.event::before{
  content:"";position:absolute;left:calc(var(--rail) - 4.5px);top:1.68rem;width:9px;height:9px;border-radius:50%;
  background:var(--tone);box-shadow:0 0 0 4px color-mix(in srgb,var(--tone) 12%,transparent),0 0 14px color-mix(in srgb,var(--tone) 55%,transparent);
}
.event .yr{text-align:right;padding-right:.55rem;font-family:var(--font-mono);font-size:.92rem;color:var(--muted);font-variant-numeric:tabular-nums;line-height:1.75}
.event .ev-body{min-width:0;padding-bottom:.4rem;border-bottom:1px solid var(--line)}
.event h4{font-size:1.02rem;letter-spacing:0;color:var(--fg);font-weight:650;transition:color .2s}
.event h4 .now{display:inline-block;margin-left:.5rem;padding:.08rem .45rem;border:1px solid color-mix(in srgb,var(--tone) 45%,transparent);border-radius:999px;font-family:var(--font-mono);font-size:.58rem;letter-spacing:.1em;color:var(--tone);vertical-align:.12em}
.event p{margin:.32rem 0 0;font-size:.9rem;line-height:1.78;color:var(--fg2);max-width:70ch}
.event .tags{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.6rem}
.tag{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.06em;padding:.14rem .48rem;border-radius:999px;border:1px solid var(--line);color:var(--muted)}
.event:hover h4{color:var(--tone)}
.event.live::before{animation:pulse 2.6s ease-out infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--tone) 45%,transparent),0 0 14px color-mix(in srgb,var(--tone) 55%,transparent)}70%{box-shadow:0 0 0 10px transparent,0 0 14px color-mix(in srgb,var(--tone) 55%,transparent)}100%{box-shadow:0 0 0 0 transparent,0 0 14px color-mix(in srgb,var(--tone) 55%,transparent)}}
.t1{--tone:#ffb45e}.t2{--tone:#ff9a6b}.t3{--tone:#ff7f95}.t4{--tone:#e982b4}
.t5{--tone:#bd8ce0}.t6{--tone:#9a8bff}.t7{--tone:#6bb6ff}.t8{--tone:#5fe3ff}
:root[data-theme="light"] .t1{--tone:#a86700}:root[data-theme="light"] .t2{--tone:#b0521f}
:root[data-theme="light"] .t3{--tone:#b83059}:root[data-theme="light"] .t4{--tone:#a23d7d}
:root[data-theme="light"] .t5{--tone:#7040a8}:root[data-theme="light"] .t6{--tone:#5b49d8}
:root[data-theme="light"] .t7{--tone:#1f6ec4}:root[data-theme="light"] .t8{--tone:#007e9e}

/* ---------- winter ---------- */
.wavefig{
  position:relative;margin-top:clamp(2rem,4vw,3rem);padding:clamp(12px,2vw,22px);
  border:1px solid var(--line);border-radius:18px;background:var(--surface);overflow:hidden;
}
.wavefig svg{display:block;width:100%;height:auto;max-width:100%}
.wave-line{fill:none;stroke:url(#waveGrad);stroke-width:2.4;stroke-linecap:round}
.wave-area{fill:url(#waveFill)}
.wave-grid line{stroke:var(--line);stroke-width:1;stroke-dasharray:2 7}
.winter-dot{fill:var(--amber);stroke:var(--surface);stroke-width:2.5}
.wg-a{stop-color:var(--amber)}.wg-b{stop-color:var(--rose)}.wg-c{stop-color:var(--violet)}.wg-d{stop-color:var(--cyan)}
.wf-a{stop-color:var(--cyan);stop-opacity:.18}.wf-b{stop-color:var(--cyan);stop-opacity:0}
.wave-call{
  position:absolute;transform:translate(-50%,-50%);padding:.16rem .5rem;border-radius:999px;
  border:1px solid color-mix(in srgb,var(--amber) 40%,transparent);
  background:color-mix(in srgb,var(--bg) 80%,transparent);
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.08em;color:var(--amber);white-space:nowrap;
}
.wave-legend{display:flex;flex-wrap:wrap;gap:.45rem 1.15rem;margin-top:14px;font-size:.7rem;color:var(--muted)}
.wave-legend i{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:.4rem}
.winter-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:clamp(1.6rem,3vw,2.4rem)}
.wcard{padding:clamp(20px,3vw,30px);border:1px solid var(--line);border-radius:16px;background:var(--surface);min-width:0}
.wcard .period{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.12em;color:var(--amber)}
.wcard h3{margin:.35rem 0 0;font-size:1.16rem}
.wlist{display:grid;gap:.65rem;margin:1rem 0 0;padding:0;list-style:none}
.wlist li{display:grid;grid-template-columns:58px minmax(0,1fr);gap:10px;font-size:.86rem;color:var(--fg2);line-height:1.7}
.wlist b{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.06em;color:var(--muted);padding-top:.28rem;font-weight:400}
.pullquote{
  margin:clamp(1.9rem,4.5vw,3.2rem) 0 0;padding-left:clamp(16px,3vw,28px);max-width:32em;
  border-left:2px solid var(--amber);font-family:var(--font-serif);
  font-size:clamp(1.25rem,1rem + 1.4vw,1.95rem);line-height:1.6;color:var(--fg);
}

/* ---------- charts / breakthrough ---------- */
.two-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:clamp(1.8rem,3.5vw,2.6rem)}
.bcard{padding:clamp(20px,3vw,30px);border:1px solid var(--line);border-radius:16px;background:var(--surface);min-width:0;position:relative;overflow:hidden}
.bcard .big{font-family:var(--font-mono);font-size:clamp(2rem,1.4rem + 2.4vw,3rem);line-height:1;color:var(--cyan);letter-spacing:-.04em;margin-bottom:.7rem}
.bcard h3{font-size:1.14rem}
.bcard p{margin:.5rem 0 0;font-size:.88rem;color:var(--fg2)}
.bcard .kw{position:absolute;right:16px;top:10px;font-family:var(--font-mono);font-size:.6rem;letter-spacing:.16em;color:var(--muted);opacity:.75}
.chart-card{margin-top:20px;padding:clamp(16px,3vw,30px);border:1px solid var(--line);border-radius:18px;background:var(--surface)}
.chart-head{display:flex;justify-content:space-between;gap:12px 20px;flex-wrap:wrap;align-items:end}
.chart-head h3{font-size:1.08rem}
.chart-head p{margin:.2rem 0 0;font-size:.76rem;color:var(--muted)}
.chart-wrap{position:relative;margin-top:10px}
.chart-wrap svg{display:block;width:100%;height:auto;overflow:visible}
.grid-line{stroke:var(--line);stroke-width:1}
.axis-text{fill:var(--muted);font-family:var(--font-mono);font-size:11px}
.anno-text{fill:var(--fg2);font-family:var(--font-mono);font-size:11px}
.data-line{fill:none;stroke:var(--cyan);stroke-width:2;stroke-linejoin:round;stroke-linecap:round}
.data-dot{fill:var(--cyan);stroke:var(--surface);stroke-width:2}
.area-fill{fill:color-mix(in srgb,var(--cyan) 12%,transparent)}
.human-line{stroke:var(--amber);stroke-width:1;stroke-dasharray:4 5;opacity:.85}
.hit{fill:transparent;cursor:crosshair}
.bar{fill:var(--amber);opacity:.92}
.bar-cyan{fill:var(--cyan);opacity:.92}
.bar-track{fill:color-mix(in srgb,var(--fg) 5%,transparent)}
.val-text{fill:var(--fg2);font-family:var(--font-mono);font-size:11px}
.val-inside{fill:var(--bg);font-family:var(--font-mono);font-size:11px;font-weight:600}
.model-text{fill:var(--fg2);font-family:var(--font-body);font-size:11.5px}
.chart-tip{
  position:absolute;left:0;top:0;z-index:3;pointer-events:none;opacity:0;transform:translate(-50%,-132%);
  padding:.32rem .58rem;border-radius:8px;background:var(--fg);color:var(--bg);
  font-size:.72rem;white-space:nowrap;transition:opacity .12s;box-shadow:0 8px 26px rgba(0,0,0,.28);
}
.chart-tip.show{opacity:1}
details.data{margin-top:10px;font-size:.78rem;color:var(--muted)}
details.data summary{cursor:pointer;color:var(--cyan);font-size:.75rem;width:max-content}
details.data .tw{overflow-x:auto;margin-top:8px}
details.data table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums;min-width:340px}
details.data th,details.data td{padding:.34rem .5rem;border-bottom:1px solid var(--line);text-align:left;font-weight:400}
details.data th{color:var(--fg2);font-family:var(--font-mono);font-size:.66rem;letter-spacing:.06em}
.chart-note{margin:.7rem 0 0;font-size:.7rem;color:var(--muted);line-height:1.6}
.attn-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:clamp(22px,4vw,44px);margin-top:clamp(1.6rem,3vw,2.4rem);align-items:start}
.sent{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:0 .12rem;
  padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--surface2);
  font-size:clamp(1.05rem,1rem+.6vw,1.45rem);line-height:2.5;
}
.sent+.sent{margin-top:12px}
.tok{position:relative;padding:0 .28rem;border-radius:5px;color:var(--fg2);white-space:nowrap}
.tok::after{
  content:"";position:absolute;left:.22rem;right:.22rem;bottom:.02em;height:3px;border-radius:2px;
  background:var(--cyan);transform:scaleX(var(--w,0));transform-origin:left;opacity:.35;
  transition:transform .45s cubic-bezier(.2,.8,.2,1),opacity .3s;
}
.sent.on .tok::after{opacity:.95;box-shadow:0 0 12px var(--glow)}
.tok.head{
  appearance:none;background:none;border:1px dashed var(--line2);color:var(--cyan);
  font:inherit;padding:0 .34rem;border-radius:6px;cursor:help;line-height:inherit;
}
.tok.head:hover,.tok.head:focus-visible{border-style:solid;outline:none;box-shadow:0 0 0 3px color-mix(in srgb,var(--cyan) 18%,transparent)}
.sent-ref{margin:.55rem 0 0;font-size:.76rem;color:var(--muted);min-height:1.3em}
.sent-ref .ans{display:none;color:var(--fg2)}
.sent-ref .ans b{color:var(--cyan);font-weight:600}
.sent.on+.sent-ref .hint{display:none}
.sent.on+.sent-ref .ans{display:inline}
.attn-copy h3{font-size:1.05rem}
.attn-copy p{margin:.6rem 0 0;font-size:.86rem;color:var(--fg2)}
.attn-copy p.small{font-size:.72rem;color:var(--muted)}
.arch{display:grid;gap:7px;margin-top:1.2rem}
.arch-node{padding:.55rem .8rem;border:1px solid var(--line2);border-radius:9px;background:color-mix(in srgb,var(--cyan) 6%,var(--surface));font-family:var(--font-mono);font-size:.72rem;color:var(--fg2);text-align:center}
.arch-stack{border:1px dashed var(--line2);border-radius:11px;padding:12px;display:grid;gap:7px}
.arch-stack .layer{padding:.45rem .7rem;border-radius:7px;background:var(--surface2);border:1px solid var(--line);font-family:var(--font-mono);font-size:.68rem;color:var(--fg2);text-align:center}
.arch-stack .cap{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.1em;color:var(--cyan);text-align:right}
.arch-arrow{text-align:center;font-size:.7rem;color:var(--muted);line-height:1}

/* ---------- race ---------- */
.teams{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:clamp(1.8rem,3.5vw,2.6rem)}
.team{
  position:relative;min-width:0;padding:20px 20px 18px;border:1px solid var(--line);border-radius:14px;
  background:var(--surface);transition:transform .25s,border-color .25s,background .25s;
}
.team:hover{transform:translateY(-3px);border-color:var(--line2);background:var(--surface2)}
.team-top{display:flex;align-items:center;gap:10px}
.badge{
  flex:none;width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:.64rem;font-weight:600;letter-spacing:.02em;
  color:var(--cyan);background:color-mix(in srgb,var(--cyan) 9%,transparent);border:1px solid color-mix(in srgb,var(--cyan) 28%,transparent);
}
.team h3{font-size:1rem;line-height:1.3}
.team .loc{font-family:var(--font-mono);font-size:.6rem;color:var(--muted);letter-spacing:.08em}
.team .route{margin:.75rem 0 0;font-size:.82rem;color:var(--fg2);line-height:1.7}
.team .model{margin-top:.55rem;font-family:var(--font-mono);font-size:.66rem;color:var(--cyan);letter-spacing:.04em}
.team .flags{display:flex;gap:.35rem;margin-top:.7rem;flex-wrap:wrap}
.flag{font-size:.58rem;font-family:var(--font-mono);letter-spacing:.06em;padding:.1rem .4rem;border-radius:4px;border:1px solid var(--line);color:var(--muted)}
.flag.open{color:var(--good);border-color:color-mix(in srgb,var(--good) 35%,transparent)}
.flag.closed{color:var(--amber);border-color:color-mix(in srgb,var(--amber) 35%,transparent)}
.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:20px}
.cmp{padding:clamp(20px,3vw,28px);border:1px solid var(--line);border-radius:16px;background:var(--surface);min-width:0}
.cmp h3{display:flex;align-items:center;gap:.5rem;font-size:1rem}
.cmp h3 .dot{width:8px;height:8px;border-radius:50%;background:var(--tone2,var(--good))}
.cmp ul{margin:.8rem 0 0;padding-left:1.1rem;color:var(--fg2);font-size:.86rem}
.cmp li{margin:.34rem 0}
.cmp .verdict{margin:.9rem 0 0;padding-top:.8rem;border-top:1px solid var(--line);font-size:.78rem;color:var(--muted)}
.china{
  margin-top:20px;padding:clamp(20px,3vw,32px);border:1px solid var(--line);border-left:2px solid var(--rose);
  border-radius:14px;background:linear-gradient(100deg,color-mix(in srgb,var(--rose) 5%,var(--surface)),var(--surface) 55%);
}
.china h3{font-size:1.1rem}
.china ol{list-style:none;margin:1rem 0 0;padding:0;display:grid;gap:.9rem}
.china li{display:grid;grid-template-columns:64px minmax(0,1fr);gap:16px;font-size:.87rem;color:var(--fg2)}
.china time{font-family:var(--font-mono);color:var(--rose);font-size:.78rem;padding-top:.12rem}
.china li b{color:var(--fg);font-weight:600}

/* ---------- cost ---------- */
.cost-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:clamp(26px,5vw,58px);align-items:start;margin-top:clamp(1.8rem,3.5vw,2.6rem)}
.walls{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden;margin-top:1.4rem}
.wall{background:var(--bg);padding:16px 18px}
.sec.alt .wall{background:var(--bg2)}
.wall b{display:block;font-family:var(--font-display);font-size:.96rem;color:var(--fg)}
.wall p{margin:.28rem 0 0;font-size:.83rem;color:var(--fg2);line-height:1.7}
.statgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.stat{padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--surface);min-width:0}
.stat b{display:block;font-family:var(--font-mono);font-size:clamp(1.25rem,1.05rem+.7vw,1.65rem);letter-spacing:-.03em;font-variant-numeric:tabular-nums;line-height:1.2}
.stat b small{font-size:.55em;color:var(--muted);margin-left:.18em;letter-spacing:0}
.stat span{display:block;margin-top:.35rem;font-size:.68rem;color:var(--muted);line-height:1.55}

/* ---------- future ---------- */
.scenarios{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:clamp(1.8rem,3.5vw,2.6rem)}
.sc{padding:22px;border:1px solid var(--line);border-radius:16px;background:var(--surface);min-width:0;display:flex;flex-direction:column;gap:.55rem}
.sc .tagline{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.14em;color:var(--muted)}
.sc h3{font-size:1.14rem}
.sc p{margin:0;font-size:.86rem;color:var(--fg2)}
.sc .signals{margin-top:auto;padding-top:.8rem;border-top:1px solid var(--line);font-size:.72rem;color:var(--muted);line-height:1.65}
.sc .signals b{color:var(--cyan);font-weight:500}
.gates{counter-reset:g;list-style:none;padding:0;margin:clamp(1.8rem,3.5vw,2.6rem) 0 0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.gates li{counter-increment:g;background:var(--bg);padding:18px}
.sec.alt .gates li{background:var(--bg2)}
.gates li::before{content:"0" counter(g);font-family:var(--font-mono);font-size:.64rem;letter-spacing:.1em;color:var(--cyan)}
.gates b{display:block;margin:.45rem 0 .28rem;font-size:.92rem;font-family:var(--font-display)}
.gates p{margin:0;font-size:.76rem;color:var(--fg2);line-height:1.65}
.survey{display:grid;grid-template-columns:auto minmax(0,1fr);gap:clamp(20px,4vw,46px);align-items:center;margin-top:clamp(2rem,4vw,3rem);padding:clamp(20px,3vw,30px);border:1px solid var(--line);border-radius:16px;background:var(--surface)}
.survey .yearbig{font-family:var(--font-mono);font-size:clamp(2.6rem,2rem + 4vw,4.4rem);line-height:1;letter-spacing:-.05em;color:var(--cyan)}
.survey p{margin:0;font-size:.88rem;color:var(--fg2)}
.survey p.small{margin-top:.4rem;font-size:.7rem;color:var(--muted)}
.glossary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;margin-top:20px;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.glossary .g{background:var(--bg);padding:17px 19px;min-width:0}
.sec.alt .glossary .g{background:var(--bg2)}
.glossary dt{font-family:var(--font-display);font-size:.94rem;color:var(--fg)}
.glossary dd{margin:.26rem 0 0;font-size:.78rem;color:var(--fg2);line-height:1.65}

/* ---------- ending ---------- */
.questions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;margin-top:clamp(1.8rem,3.5vw,2.6rem);background:var(--line);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.q{background:var(--bg);padding:clamp(20px,3vw,30px);min-width:0}
.q span{font-family:var(--font-mono);font-size:.64rem;letter-spacing:.14em;color:var(--cyan)}
.q p{margin:.5rem 0 0;font-family:var(--font-display);font-size:clamp(1.02rem,1rem+.5vw,1.3rem);line-height:1.55;color:var(--fg);text-wrap:balance}
.closing{margin-top:clamp(2.4rem,6vw,4rem);max-width:31em;font-family:var(--font-serif);font-size:clamp(1.2rem,1rem + 1.4vw,1.9rem);line-height:1.68;color:var(--fg)}
.sources{margin-top:clamp(2.4rem,5vw,3.6rem);padding-top:20px;border-top:1px solid var(--line);font-size:.76rem;color:var(--muted)}
.sources h3{font-size:.9rem;margin-bottom:.6rem;color:var(--fg2)}
.sources ol{margin:0;padding-left:1.15rem;columns:2;column-gap:32px}
.sources li{break-inside:avoid;margin:.35rem 0}
.sources a{color:var(--fg2);text-underline-offset:3px}
.sources a:hover{color:var(--cyan)}
.foot{padding-block:34px;border-top:1px solid var(--line);background:var(--bg2);font-size:.72rem;color:var(--muted)}
.foot .wrap{display:flex;flex-wrap:wrap;gap:10px 26px;justify-content:space-between;align-items:center}
.foot a{color:var(--muted);text-decoration:none}
.foot a:hover{color:var(--cyan)}

/* ---------- hud / menu / motion ---------- */
.year-hud{
  position:fixed;right:max(18px,env(safe-area-inset-right,0px));bottom:max(18px,env(safe-area-inset-bottom,0px));z-index:40;
  display:flex;align-items:center;gap:.55rem;padding:.42rem .7rem;border:1px solid var(--line2);border-radius:999px;
  background:color-mix(in srgb,var(--bg) 82%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  font-family:var(--font-mono);font-size:.68rem;color:var(--muted);
  opacity:0;transform:translateY(8px);pointer-events:none;transition:opacity .25s,transform .25s;
}
.year-hud.show{opacity:1;transform:none}
.year-hud b{color:var(--cyan);font-weight:600;font-variant-numeric:tabular-nums}
.year-hud .dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);animation:live 2.4s infinite}
html.js-motion .reveal{opacity:0;transform:translateY(20px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1);transition-delay:var(--d,0s)}
html.js-motion .reveal.in{opacity:1;transform:none}

/* ---------- side rail / cursor glow ---------- */
.cursor-glow{
  position:fixed;left:0;top:0;width:460px;height:460px;border-radius:50%;pointer-events:none;z-index:3;
  transform:translate3d(-50%,-50%,0);opacity:0;transition:opacity .5s;
  background:radial-gradient(circle,color-mix(in srgb,var(--cyan) 11%,transparent),transparent 62%);
  will-change:transform;
}
.cursor-glow.on{opacity:1}
.rail{position:fixed;left:max(16px,env(safe-area-inset-left,0px));top:50%;transform:translateY(-50%);z-index:46;display:grid;gap:13px}
.rail a{position:relative;display:block;width:7px;height:7px;border-radius:50%;border:1px solid var(--line2);background:color-mix(in srgb,var(--fg) 8%,transparent);transition:background .25s,box-shadow .25s,transform .25s}
.rail a::after{
  content:attr(data-label);position:absolute;left:17px;top:50%;white-space:nowrap;pointer-events:none;
  transform:translateY(-50%) translateX(-5px);opacity:0;transition:opacity .2s,transform .2s;
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.12em;color:var(--muted);
}
.rail a:hover{transform:scale(1.5)}
.rail a:hover::after,.rail a[aria-current="true"]::after{opacity:1;transform:translateY(-50%)}
.rail a[aria-current="true"]{background:var(--cyan);border-color:var(--cyan);box-shadow:0 0 12px var(--glow);transform:scale(1.35)}
@media (max-width:1280px){.rail{display:none}}

/* ---------- button sheen ---------- */
.btn{position:relative;overflow:hidden}
.btn::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(110deg,transparent 32%,rgba(255,255,255,.28) 50%,transparent 68%);
  transform:translateX(-130%);transition:transform .65s ease;
}
.btn:hover::after{transform:translateX(130%)}
.btn.ghost::after{background:linear-gradient(110deg,transparent 32%,color-mix(in srgb,var(--cyan) 22%,transparent) 50%,transparent 68%)}

/* ---------- model hall ---------- */
.hall{position:relative;height:330vh;background:var(--bg2);border-block:1px solid var(--line);overflow:clip}
.hall-sticky{
  position:sticky;top:0;height:100vh;display:flex;flex-direction:column;justify-content:center;
  gap:clamp(12px,2vh,24px);padding-top:74px;overflow:hidden;
}
.hall-head{max-width:980px}
.hall-head .lede{margin-top:.8rem}
.hall-viewport{width:100%;overflow:hidden}
.hall-track{
  display:flex;gap:16px;width:max-content;padding-inline:max(24px,env(safe-area-inset-left,0px)) max(24px,env(safe-area-inset-right,0px));
  will-change:transform;
}
.mcard{
  position:relative;display:flex;flex-direction:column;width:clamp(250px,21vw,300px);flex:none;min-height:308px;
  padding:22px;border:1px solid var(--line);border-radius:18px;overflow:hidden;
  background:linear-gradient(180deg,var(--surface),var(--surface2));
  transition:border-color .3s,transform .3s;
}
.mcard:hover{border-color:var(--line2);transform:translateY(-5px)}
.mcard::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .35s;
  background:radial-gradient(260px circle at 20% 0%,color-mix(in srgb,var(--cyan) 13%,transparent),transparent 70%);
}
.mcard:hover::before{opacity:1}
.mcard .mnum{position:absolute;right:12px;top:4px;font-family:var(--font-mono);font-size:2.6rem;letter-spacing:-.05em;color:color-mix(in srgb,var(--fg) 7%,transparent);line-height:1}
.mcard .myear{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;color:var(--cyan)}
.mcard .mglyph{width:42px;height:42px;color:var(--cyan);margin:20px 0 14px;position:relative;z-index:1}
.mcard h3{position:relative;z-index:1;font-size:1.1rem;letter-spacing:0}
.mcard p{position:relative;z-index:1;margin:.45rem 0 0;font-size:.82rem;line-height:1.75;color:var(--fg2)}
.mcard .mtags{display:flex;flex-wrap:wrap;gap:.35rem;margin-top:auto;padding-top:1rem;position:relative;z-index:1}
.hall-foot{display:flex;align-items:center;gap:14px;font-family:var(--font-mono);font-size:.6rem;letter-spacing:.12em;color:var(--muted)}
.hall-bar{flex:1;height:1px;background:var(--line);position:relative}
.hall-bar i{position:absolute;left:0;top:-1px;height:3px;width:0;border-radius:2px;background:linear-gradient(90deg,var(--amber),var(--rose),var(--cyan));box-shadow:0 0 12px var(--glow)}
@media (max-height:720px){.hall-sticky{justify-content:flex-start;padding-top:82px}.mcard{min-height:270px}}
@media (max-width:900px){
  .hall{height:auto;overflow:visible}
  .hall-sticky{position:static;height:auto;padding:clamp(46px,8vw,70px) 0 36px;gap:18px}
  .hall-viewport{overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:thin}
  .hall-track{transform:none!important;padding-bottom:14px}
  .mcard{width:78vw;max-width:320px;scroll-snap-align:start}
  .hall-foot{margin-top:6px}
}
@media (prefers-reduced-motion:reduce){
  .hall{height:auto;overflow:visible}
  .hall-sticky{position:static;height:auto;padding:64px 0 36px}
  .hall-viewport{overflow-x:auto}
  .hall-track{transform:none!important}
}

/* ---------- people ---------- */
.people{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:clamp(1.8rem,3.5vw,2.6rem)}
.person{
  position:relative;min-width:0;padding:20px;border:1px solid var(--line);border-radius:16px;background:var(--surface);
  transition:border-color .25s,transform .25s,background .25s;overflow:hidden;
}
.person:hover{border-color:var(--line2);transform:translateY(-3px);background:var(--surface2)}
.person .avatar{
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:.68rem;font-weight:600;letter-spacing:.04em;
  color:var(--cyan);background:color-mix(in srgb,var(--cyan) 9%,transparent);border:1px solid color-mix(in srgb,var(--cyan) 30%,transparent);
}
.person h3{margin-top:.8rem;font-size:.98rem;line-height:1.3}
.person .years{display:block;margin-top:.2rem;font-family:var(--font-mono);font-size:.6rem;letter-spacing:.09em;color:var(--muted)}
.person p{margin-top:.55rem;font-size:.79rem;line-height:1.7;color:var(--fg2)}
.person .kw{display:block;margin-top:.7rem;font-family:var(--font-mono);font-size:.6rem;letter-spacing:.12em;color:var(--cyan)}
.person .role{position:absolute;right:14px;top:14px;font-family:var(--font-mono);font-size:.55rem;letter-spacing:.1em;color:var(--muted);opacity:.75}

/* ---------- lineage ---------- */
.lineage{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:clamp(1.8rem,3.5vw,2.6rem)}
.lane{padding:clamp(18px,3vw,26px);border:1px solid var(--line);border-radius:16px;background:var(--surface);min-width:0}
.lane .lane-k{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.16em;color:var(--tone,var(--cyan))}
.lane h3{margin-top:.35rem;font-size:1.05rem}
.lane .lane-note{margin-top:.3rem;font-size:.76rem;color:var(--muted)}
.lchain{position:relative;margin-top:18px;padding-left:20px;display:grid;gap:13px}
.lchain::before{content:"";position:absolute;left:4px;top:8px;bottom:8px;width:1px;background:linear-gradient(180deg,var(--tone,var(--cyan)),color-mix(in srgb,var(--tone,var(--cyan)) 20%,transparent));opacity:.55}
.lnode{position:relative;font-size:.8rem;color:var(--fg2);line-height:1.6}
.lnode::before{content:"";position:absolute;left:-20px;top:.5em;width:7px;height:7px;border-radius:50%;background:var(--tone,var(--cyan));box-shadow:0 0 9px color-mix(in srgb,var(--tone,var(--cyan)) 60%,transparent)}
.lnode b{display:block;font-family:var(--font-display);font-size:.88rem;color:var(--fg);font-weight:650}
.lnode span{font-family:var(--font-mono);font-size:.58rem;letter-spacing:.08em;color:var(--muted)}
.merge{margin-top:16px;padding:20px 24px;border:1px solid var(--line2);border-radius:14px;text-align:center;background:linear-gradient(100deg,color-mix(in srgb,var(--amber) 7%,var(--surface)),color-mix(in srgb,var(--cyan) 8%,var(--surface)))}
.merge b{font-family:var(--font-display);font-size:1.02rem}
.merge span{display:block;margin-top:.35rem;font-size:.78rem;color:var(--fg2)}

/* ---------- limits ---------- */
.ladder{display:grid;gap:8px;margin-top:clamp(1.6rem,3vw,2.4rem)}
.step{display:grid;grid-template-columns:62px minmax(0,1fr) 90px;gap:14px;align-items:center;padding:13px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
.step .sy{font-family:var(--font-mono);font-size:.7rem;color:var(--cyan);letter-spacing:.06em}
.step b{font-size:.9rem;color:var(--fg);font-weight:600}
.step p{margin-top:.15rem;font-size:.74rem;color:var(--muted);line-height:1.5}
.step .sbar{height:5px;border-radius:3px;background:color-mix(in srgb,var(--fg) 7%,transparent);overflow:hidden}
.step .sbar i{display:block;height:100%;width:var(--w,20%);border-radius:3px;background:linear-gradient(90deg,var(--amber),var(--rose),var(--cyan))}
.risks{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;margin-top:20px;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.risk{background:var(--bg);padding:18px 19px;min-width:0}
.sec.alt .risk{background:var(--bg2)}
.risk h3{display:flex;align-items:center;gap:.45rem;font-size:.92rem}
.risk h3 .rd{width:6px;height:6px;border-radius:50%;background:var(--amber);box-shadow:0 0 8px var(--amber)}
.risk p{margin-top:.4rem;font-size:.76rem;line-height:1.7;color:var(--fg2)}
.policy{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:20px}
.pol{padding:16px 18px;border-left:2px solid var(--tone,var(--cyan));border-radius:0 12px 12px 0;background:var(--surface);min-width:0}
.pol b{display:block;font-size:.86rem;font-family:var(--font-display)}
.pol span{display:block;margin-top:.3rem;font-size:.72rem;color:var(--muted);line-height:1.6}

/* ---------- trivia ---------- */
.trivia{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;margin-top:clamp(1.8rem,3.5vw,2.6rem);background:var(--line);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.triv{display:grid;grid-template-columns:42px minmax(0,1fr);gap:14px;background:var(--bg);padding:18px 20px;min-width:0}
.sec.alt .triv{background:var(--bg2)}
.triv b{font-family:var(--font-mono);font-size:.72rem;color:var(--cyan);letter-spacing:.06em;padding-top:.15rem}
.triv p{font-size:.83rem;line-height:1.72;color:var(--fg2)}
.triv p strong{color:var(--fg);font-weight:600}

/* ---------- timeline scroll progress ---------- */
.tl-progress{position:absolute;left:var(--rail);top:0;width:1px;height:0;z-index:2;pointer-events:none;background:linear-gradient(180deg,var(--amber),var(--rose) 45%,var(--cyan));box-shadow:0 0 14px var(--glow);transition:height .12s linear}

@media (max-width:1100px){
  .people{grid-template-columns:repeat(3,minmax(0,1fr))}
  .risks{grid-template-columns:repeat(2,minmax(0,1fr))}
  .policy{grid-template-columns:1fr}
}
@media (max-width:900px){
  .people{grid-template-columns:repeat(2,minmax(0,1fr))}
  .lineage{grid-template-columns:1fr}
}
@media (max-width:760px){
  .people{grid-template-columns:1fr}
  .risks{grid-template-columns:1fr}
  .trivia{grid-template-columns:1fr}
  .step{grid-template-columns:54px minmax(0,1fr)}
  .step .sbar{display:none}
}
@media (prefers-reduced-motion:reduce){
  .cursor-glow{display:none}
  .btn::after{display:none}
}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .teams{grid-template-columns:repeat(3,minmax(0,1fr))}
  .gates{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:940px){
  .nav{display:none}
  .menu-btn{display:block}
  .nav.open{
    display:grid;position:fixed;left:max(12px,env(safe-area-inset-left,0px));right:max(12px,env(safe-area-inset-right,0px));
    top:calc(62px + env(safe-area-inset-top,0px));margin:0;padding:10px;gap:2px;
    border:1px solid var(--line2);border-radius:14px;background:var(--bg2);
    -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:0 30px 70px rgba(0,0,0,.5);z-index:75;
  }
  .nav.open a{padding:.68rem .8rem;font-size:.92rem;color:var(--fg2);border-radius:8px}
  .nav.open a:hover{background:var(--surface2);color:var(--fg)}
  .nav.open a[aria-current="true"]{color:var(--cyan)}
  .nav.open a[aria-current="true"]::after{display:none}
  .teams{grid-template-columns:repeat(2,minmax(0,1fr))}
  .paradigm{grid-template-columns:1fr}
  .attn-grid{grid-template-columns:1fr}
  .cost-grid{grid-template-columns:1fr}
  .statgrid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .scenarios{grid-template-columns:1fr}
  .sc{display:grid;grid-template-columns:1fr;gap:.4rem}
  .gates{grid-template-columns:repeat(2,minmax(0,1fr))}
  .glossary{grid-template-columns:repeat(2,minmax(0,1fr))}
  .two-cards{grid-template-columns:1fr}
  .sources ol{columns:1}
}
@media (max-width:760px){
  .axis-text{font-size:12.5px}
  .anno-text{font-size:12.5px}
  .model-text{font-size:12.5px}
  .val-text,.val-inside{font-size:12.5px}
  .sent{font-size:.98rem;line-height:2.3;padding:12px 13px}
  .tok{padding:0 .22rem}
  .tok.head{padding:0 .3rem}
  .wrap{padding-inline:max(18px,env(safe-area-inset-left,0px)) max(18px,env(safe-area-inset-right,0px))}
  .hero .wrap{padding-block:96px 48px}
  .hero h1 .rest{font-size:.32em;letter-spacing:.05em}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hstat{padding:.9rem .6rem .9rem 0}
  .hstat:nth-child(odd){padding-left:0;border-left:0}
  .hstat:nth-child(even){padding-left:1rem;border-left:1px solid var(--line)}
  .hstat:nth-child(n+3){border-top:1px solid var(--line)}
  .triad{grid-template-columns:1fr}
  .winter-cards{grid-template-columns:1fr}
  .compare{grid-template-columns:1fr}
  .questions{grid-template-columns:1fr}
  .statgrid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .survey{grid-template-columns:1fr}
  .tl{--rail:52px}
  .event{column-gap:18px}
  .era-head{padding-left:calc(var(--rail) + 18px)}
  .event::before{left:calc(var(--rail) - 4.5px);top:1.5rem}
  .event .yr{font-size:.8rem}
  .event h4{font-size:.97rem}
  .event p{font-size:.86rem}
  .wave-call{font-size:.56rem;padding:.12rem .38rem}
}
@media (max-width:560px){
  .teams{grid-template-columns:1fr}
  .gates{grid-template-columns:1fr}
  .glossary{grid-template-columns:1fr}
  .brand small{display:none}
  .hero h1{letter-spacing:-.045em}
  .hero h1 .l2{gap:.18em}
  .hero h1 .rest{font-size:.34em}
  .sent{font-size:1.02rem;line-height:2.4;padding:14px}
  .chart-head p{font-size:.7rem}
  .year-hud{font-size:.6rem}
  .closing{max-width:100%}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  ::view-transition-old(root),::view-transition-new(root){animation:none}
  .hero h1 .grad{animation:none}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .ticker-track{animation:none}
  .hero .eyebrow,.hero h1,.hero .lead,.hero .cta-row,.hero-stats{animation:none}
  html.js-motion .reveal{opacity:1;transform:none}
}