/* AI Value Chain Atlas — Derek demo family styles */
:root {
  --bg: #FFFFFF;
  --panel: #F4F8F6;
  --panel-2: #EEF2F1;
  --line: #E3EAE6;
  --line-2: #D3DDD8;
  --ink: #111827;
  --ink-2: #374151;
  --muted: #6B7280;
  --green: #1D5C45;
  --green-2: #2A7A5C;
  --green-soft: #E3F0EA;
  --amber: #B45309;
  --amber-soft: #FEF3C7;
  --red: #B42318;
  --red-soft: #FEE4E2;
  --btn: #1D5C45;
  --btn-ink: #FFFFFF;
  --dark-btn: #111827;
  --dark-btn-ink: #FFFFFF;
  --svg-fill: #FFFFFF;
  --svg-stroke: #A3ADB8;
  --shadow: 0 1px 2px rgba(17, 24, 39, .04), 0 8px 24px rgba(17, 24, 39, .06);
  --font: 'Inter', 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, 'PingFang SC', monospace;
  --serif: 'Noto Serif', Georgia, 'Times New Roman', serif;
  --r: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0C1310; --panel: #111C17; --panel-2: #15221C; --line: #22322B; --line-2: #2E4239;
    --ink: #E7EEEA; --ink-2: #C9D4CF; --muted: #93A39C;
    --green: #6CC59D; --green-2: #86D3B0; --green-soft: #173528;
    --amber: #F3B54E; --amber-soft: #3A2A0D; --red: #F7877C; --red-soft: #3D1A16;
    --btn: #2F8A65; --btn-ink: #FFFFFF; --dark-btn: #E7EEEA; --dark-btn-ink: #0C1310;
    --svg-fill: #14211B; --svg-stroke: #5B6E66;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .3);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0C1310; --panel: #111C17; --panel-2: #15221C; --line: #22322B; --line-2: #2E4239;
  --ink: #E7EEEA; --ink-2: #C9D4CF; --muted: #93A39C;
  --green: #6CC59D; --green-2: #86D3B0; --green-soft: #173528;
  --amber: #F3B54E; --amber-soft: #3A2A0D; --red: #F7877C; --red-soft: #3D1A16;
  --btn: #2F8A65; --btn-ink: #FFFFFF; --dark-btn: #E7EEEA; --dark-btn-ink: #0C1310;
  --svg-fill: #14211B; --svg-stroke: #5B6E66;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .3);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 16px/1.55 var(--font); overflow-x: hidden; }
h1, h2, h3, h4, p { margin: 0; }
a { color: var(--green); }
button { font: inherit; color: inherit; }
img, svg { max-width: 100%; }
.wrap { max-width: 1320px; margin: 0 auto; padding: 0 32px; }
.muted { color: var(--muted); }
.skip { position: absolute; left: -9999px; top: 8px; background: var(--ink); color: var(--bg); padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--green); outline-offset: 2px; border-radius: 6px; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 18px; border-radius: 10px; border: 1px solid var(--line-2); background: var(--bg); color: var(--ink); font-weight: 600; font-size: 15px; text-decoration: none; cursor: pointer; transition: background .15s, border-color .15s, transform .1s; }
.btn:hover { border-color: var(--green); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--btn); border-color: var(--btn); color: var(--btn-ink); }
.btn-primary:hover { filter: brightness(1.08); border-color: var(--btn); }
.btn-dark { background: var(--dark-btn); border-color: var(--dark-btn); color: var(--dark-btn-ink); }
.btn-dark:hover { border-color: var(--dark-btn); filter: brightness(1.15); }
.btn-ghost { background: var(--bg); }
.icon-btn { width: 44px; height: 44px; display: inline-grid; place-items: center; border: 1px solid var(--line-2); border-radius: 10px; background: var(--bg); cursor: pointer; padding: 0; }
.icon-btn svg { width: 20px; height: 20px; fill: none; stroke: var(--ink); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.icon-btn.sm { width: 32px; height: 32px; font-size: 20px; line-height: 1; border-radius: 8px; color: var(--muted); }
.i-sun { display: none; }
:root[data-theme="dark"] .i-sun { display: block; }
:root[data-theme="dark"] .i-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .i-sun { display: block; }
  :root:not([data-theme="light"]) .i-moon { display: none; }
}

/* ---------- Header ---------- */
.top { position: sticky; top: 0; z-index: 40; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); }
.top-in { max-width: 1320px; margin: 0 auto; padding: 10px 32px; display: flex; align-items: center; gap: 14px; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); flex: none; }
.brand-d { font: 600 38px/1 var(--serif); color: var(--ink); letter-spacing: -.02em; margin-top: -2px; }
.brand-words { display: flex; flex-direction: column; gap: 3px; }
.brand-words b { font: 600 14px/1 var(--font); letter-spacing: .38em; }
.brand-words small { font: 500 7.5px/1 var(--font); letter-spacing: .2em; color: var(--muted); white-space: nowrap; }
.brand-rule { width: 1px; height: 28px; background: var(--line-2); flex: none; }
.proj { font-weight: 700; font-size: 16px; letter-spacing: -.01em; white-space: nowrap; }
.pill { display: inline-flex; align-items: center; height: 26px; padding: 0 10px; border-radius: 999px; background: var(--green-soft); color: var(--green); font: 600 12px/1 var(--font); white-space: nowrap; border: 1px solid color-mix(in srgb, var(--green) 25%, transparent); }
.nav { display: flex; gap: 4px; margin: 0 auto; }
.nav a { padding: 8px 12px; border-radius: 8px; color: var(--ink-2); text-decoration: none; font-weight: 500; font-size: 15px; white-space: nowrap; }
.nav a:hover { background: var(--panel); color: var(--ink); }
.nav a.is-on { color: var(--green); background: var(--green-soft); }
.tools { display: flex; align-items: center; gap: 8px; flex: none; }
.lang { display: inline-flex; border: 1px solid var(--line-2); border-radius: 10px; padding: 3px; height: 44px; }
.lang button { border: 0; background: transparent; padding: 0 10px; border-radius: 7px; font-weight: 600; font-size: 14px; cursor: pointer; color: var(--muted); min-width: 44px; }
.lang button[aria-pressed="true"] { background: var(--green-soft); color: var(--green); }

/* ---------- Hero ---------- */
.hero { padding: 64px 0 72px; border-bottom: 1px solid var(--line); background: radial-gradient(1200px 400px at 85% -10%, var(--green-soft), transparent 70%); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); gap: 56px; align-items: center; }
.eyebrow, .sec-label, .mini-k, .flow-k, .coach-k { font: 600 13px/1.2 var(--mono); letter-spacing: .12em; color: var(--green); text-transform: uppercase; }
.hero h1 { margin-top: 18px; font-size: clamp(36px, 5.2vw, 64px); line-height: 1.04; letter-spacing: -.035em; font-weight: 800; max-width: 15ch; }
.is-zh .hero h1 { letter-spacing: -.01em; line-height: 1.18; max-width: 13em; }
.lede { margin-top: 20px; font-size: 19px; color: var(--ink-2); max-width: 40em; }
.cta-row { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px; }
.cta-row .btn { min-height: 50px; padding: 12px 22px; font-size: 16px; }
.stats { list-style: none; padding: 0; margin: 32px 0 0; display: flex; flex-wrap: wrap; gap: 10px 28px; }
.stats li { display: flex; align-items: baseline; gap: 6px; color: var(--muted); font-size: 15px; }
.stats b { font-size: 26px; color: var(--ink); font-weight: 800; letter-spacing: -.02em; }
.flow-card { list-style: none; margin: 0; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: var(--bg); box-shadow: var(--shadow); display: grid; gap: 0; }
.flow-head { font: 600 12px/1 var(--mono); letter-spacing: .14em; color: var(--muted); padding: 0 0 14px 4px; }
.flow-step { position: relative; padding: 14px 14px 14px 46px; border-radius: 12px; display: grid; gap: 4px; }
.flow-step::before { content: ''; position: absolute; left: 22px; top: 18px; width: 10px; height: 10px; border-radius: 50%; background: var(--bg); border: 2px solid var(--green); }
.flow-step:not(:last-child)::after { content: ''; position: absolute; left: 27px; top: 32px; bottom: -16px; width: 2px; background: var(--line-2); }
.flow-step strong { font-size: 16px; font-weight: 600; line-height: 1.35; }
.flow-step small { color: var(--muted); font-size: 13px; }
.flow-you { background: var(--green-soft); }
.flow-you::before { background: var(--green); }
.ev-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }

/* ---------- Evidence badges ---------- */
.ev { display: inline-flex; align-items: center; gap: 6px; height: 24px; padding: 0 9px; border-radius: 999px; font: 600 12px/1 var(--font); white-space: nowrap; border: 1px solid transparent; }
.ev::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.ev[data-ev="supported"] { background: var(--green-soft); color: var(--green); }
.ev[data-ev="qualified"] { background: var(--amber-soft); color: var(--amber); }
.ev[data-ev="unresolved"] { background: var(--red-soft); color: var(--red); }
.ev[data-ev="synthetic"] { background: transparent; color: var(--muted); border: 1px dashed var(--line-2); }
.ev[data-ev="synthetic"]::before { background: transparent; border: 1.5px solid currentColor; width: 6px; height: 6px; }

/* ---------- Sections ---------- */
.sec { padding: 88px 0; }
.sec-alt { background: var(--panel); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sec-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 470px); gap: 24px 48px; align-items: end; margin-bottom: 36px; }
.sec-head h2 { margin-top: 14px; font-size: clamp(30px, 4.2vw, 54px); line-height: 1.06; letter-spacing: -.03em; font-weight: 800; }
.is-zh .sec-head h2 { letter-spacing: -.005em; line-height: 1.2; }
.sec-side { color: var(--muted); font-size: 18px; line-height: 1.6; }
.fine { color: var(--muted); font-size: 13px; margin-top: 14px; }

/* ---------- 01 Fresh data ---------- */
.stamp { display: inline-flex; align-items: center; gap: 8px; font: 500 13px/1 var(--mono); color: var(--muted); margin-bottom: 18px; }
.dot-live { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px var(--green-soft); }
.ind-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.ind { border: 1px solid var(--line); border-radius: var(--r); padding: 18px; background: var(--bg); display: grid; gap: 8px; text-align: left; cursor: pointer; transition: border-color .15s, box-shadow .15s; }
.ind:hover { border-color: var(--green); box-shadow: var(--shadow); }
.ind-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.ind-name { font-weight: 600; font-size: 15px; }
.ind-ill { font: 600 10px/1 var(--mono); letter-spacing: .1em; color: var(--muted); border: 1px dashed var(--line-2); border-radius: 4px; padding: 4px 5px; white-space: nowrap; }
.ind-val { display: flex; align-items: baseline; gap: 6px; }
.ind-val b { font-size: 32px; font-weight: 800; letter-spacing: -.03em; }
.ind-val span { color: var(--muted); font-size: 14px; }
.ind-chg { font-size: 13px; color: var(--muted); }
.ind-chg b { font-weight: 700; }
.ind-chg .up { color: var(--red); }
.ind-chg .dn { color: var(--green); }
.ind svg { width: 100%; height: 44px; display: block; }
.ind .spark { fill: none; stroke: var(--green); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.ind .spark-a { fill: var(--green-soft); stroke: none; }
.ind-layer { font: 500 12px/1.3 var(--mono); color: var(--muted); }
.sig-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin: 44px 0 14px; flex-wrap: wrap; }
.sig-head h3 { font-size: 24px; letter-spacing: -.02em; }
.sig-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.sig { border: 1px solid var(--line); border-radius: var(--r); padding: 18px; display: flex; flex-direction: column; gap: 10px; background: var(--bg); transition: border-color .2s, box-shadow .2s; }
.sig-meta { font: 500 12px/1.4 var(--mono); color: var(--muted); }
.sig h4 { font-size: 17px; line-height: 1.35; letter-spacing: -.01em; font-weight: 650; }
.sig-why { color: var(--ink-2); font-size: 14.5px; }
.sig-tags { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.tag { display: inline-flex; align-items: center; height: 24px; padding: 0 9px; border-radius: 6px; background: var(--panel); border: 1px solid var(--line); font: 500 12px/1 var(--font); color: var(--ink-2); cursor: pointer; white-space: nowrap; text-decoration: none; }
.tag:hover { border-color: var(--green); color: var(--green); }
.sig-foot { margin-top: auto; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; padding-top: 10px; border-top: 1px solid var(--line); }
.linkbtn { border: 0; background: none; padding: 6px 0; color: var(--green); font-weight: 600; font-size: 14px; cursor: pointer; min-height: 36px; }
.linkbtn:hover { text-decoration: underline; }
.call { display: inline-flex; border: 1px solid var(--line-2); border-radius: 8px; overflow: hidden; }
.call button { border: 0; background: var(--bg); padding: 0 9px; height: 34px; font-size: 12.5px; font-weight: 600; color: var(--muted); cursor: pointer; border-right: 1px solid var(--line); }
.call button:last-child { border-right: 0; }
.call button[aria-pressed="true"][data-call="watch"] { background: var(--green-soft); color: var(--green); }
.call button[aria-pressed="true"][data-call="verify"] { background: var(--amber-soft); color: var(--amber); }
.call button[aria-pressed="true"][data-call="dismiss"] { background: var(--panel-2); color: var(--ink); text-decoration: line-through; }
.call-k { font: 600 11px/1 var(--mono); letter-spacing: .08em; color: var(--muted); text-transform: uppercase; margin-right: 6px; }
.sig.is-dismissed { opacity: .55; }

/* ---------- 02 Industry map ---------- */
.seg { display: inline-flex; padding: 4px; border-radius: 12px; background: var(--bg); border: 1px solid var(--line-2); margin-bottom: 18px; }
.seg button { border: 0; background: transparent; height: 40px; padding: 0 16px; border-radius: 9px; font-weight: 600; font-size: 14.5px; color: var(--muted); cursor: pointer; }
.seg button[aria-selected="true"], .seg button[aria-pressed="true"] { background: var(--green); color: var(--bg); }
.map-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 420px); gap: 28px; align-items: start; }
.map-hint { font: 500 13px/1.4 var(--mono); color: var(--muted); margin-bottom: 10px; }
.layers { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.layer { display: grid; grid-template-columns: 52px minmax(0, 1fr) minmax(0, 1.1fr) 150px; gap: 14px; align-items: center; padding: 12px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg); cursor: pointer; text-align: left; width: 100%; transition: border-color .15s, box-shadow .15s, transform .35s; }
.layer:hover { border-color: var(--green); }
.layer.is-on { border-color: var(--green); box-shadow: 0 0 0 1px var(--green) inset, var(--shadow); }
.layer-n { font: 600 15px/1 var(--mono); color: var(--green); }
.layer-n small { display: block; font-size: 11px; color: var(--muted); margin-top: 4px; }
.layer-name { font-weight: 700; font-size: 16px; line-height: 1.25; }
.layer-sub { color: var(--muted); font-size: 13px; margin-top: 2px; }
.layer-tech { display: flex; flex-wrap: wrap; gap: 5px; }
.layer-tech span { font-size: 12px; padding: 3px 7px; border-radius: 6px; background: var(--panel); color: var(--ink-2); border: 1px solid var(--line); white-space: nowrap; }
.meter { display: grid; gap: 5px; }
.meter-top { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); }
.meter-top b { color: var(--ink); font-size: 14px; }
.bar { height: 8px; border-radius: 99px; background: var(--panel-2); overflow: hidden; position: relative; }
.bar > i { position: absolute; inset: 0 auto 0 0; border-radius: 99px; background: var(--green); transition: width .6s ease; }
.bar > i.hot { background: var(--red); }
.bar > i.warm { background: var(--amber); }
.layer-detail { position: sticky; top: 96px; border: 1px solid var(--line); border-radius: 16px; background: var(--bg); padding: 24px; display: grid; gap: 16px; box-shadow: var(--shadow); }
.ld-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.ld-head h3 { font-size: 24px; letter-spacing: -.02em; line-height: 1.2; margin-top: 6px; }
.ld-score { text-align: right; flex: none; }
.ld-score b { font-size: 34px; font-weight: 800; letter-spacing: -.03em; display: block; line-height: 1; }
.ld-score span { font-size: 12px; color: var(--muted); }
.ld-io { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.ld-io div { background: var(--panel); border-radius: 10px; padding: 10px 12px; font-size: 14px; }
.ld-io b { display: block; font-size: 12px; color: var(--muted); font-weight: 600; margin-bottom: 2px; }
.ld-block p:last-child { font-size: 15px; color: var(--ink-2); margin-top: 4px; }
.drivers { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 6px; }
.drivers div { border: 1px dashed var(--line-2); border-radius: 10px; padding: 8px 10px; font-size: 13px; color: var(--muted); }
.drivers b { display: block; color: var(--ink); font-size: 15px; }
.tech-links { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.opp { border-radius: 12px; padding: 14px 16px; background: var(--red-soft); color: var(--ink); font-size: 14.5px; display: grid; gap: 4px; }
.opp b { color: var(--red); }

/* ---------- 03 Technology lab ---------- */
.lab { display: grid; grid-template-columns: 330px minmax(0, 1fr); border: 1px solid var(--line); border-radius: 20px; overflow: hidden; background: var(--bg); box-shadow: var(--shadow); }
.lab-side { background: var(--panel); border-right: 1px solid var(--line); max-height: 1180px; overflow-y: auto; }
.lab-side-head { padding: 26px 24px 20px; border-bottom: 1px solid var(--line); display: grid; gap: 8px; }
.lab-side-head strong { font-size: 19px; line-height: 1.3; letter-spacing: -.01em; }
.lab-side-head span { color: var(--muted); font-size: 15px; }
.tl-group { padding: 16px 14px 4px; }
.tl-group-h { display: flex; gap: 8px; align-items: baseline; padding: 0 10px 6px; font-size: 14px; color: var(--muted); }
.tl-group-h b { font: 600 14px/1 var(--mono); color: var(--ink); }
.tl-item { display: block; width: 100%; text-align: left; padding: 11px 14px; border-radius: 10px; border: 1px solid transparent; background: transparent; cursor: pointer; font-size: 15.5px; color: var(--ink-2); margin: 2px 0; }
.tl-item:hover { background: var(--bg); }
.tl-item[aria-current="true"] { background: var(--bg); border-color: var(--green); color: var(--ink); font-weight: 600; box-shadow: inset 3px 0 0 var(--green); }
.lab-main { padding: 36px 40px 32px; min-width: 0; }
.topic-pick { display: none; }
.lab-layer { font: 600 13px/1 var(--mono); letter-spacing: .14em; color: var(--green); text-transform: uppercase; }
.lab-title { font-size: clamp(28px, 3.4vw, 42px); letter-spacing: -.03em; line-height: 1.1; margin-top: 12px; font-weight: 700; }
.lab-one { color: var(--ink-2); font-size: 18px; margin-top: 14px; max-width: 46em; }
.lab-body { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 28px; margin-top: 28px; align-items: start; }
.scene-card { border: 1px solid var(--line); border-radius: 16px; background: var(--panel-2); overflow: hidden; }
.scene-top { display: flex; justify-content: space-between; padding: 16px 20px 0; font: 500 12.5px/1 var(--mono); letter-spacing: .1em; color: var(--muted); }
.scene { padding: 10px 14px 0; }
.scene svg { display: block; width: 100%; max-width: 620px; height: auto; margin: 0 auto; overflow: visible; }
.scene-cap { text-align: center; font-weight: 600; font-size: 16px; padding: 4px 16px 16px; color: var(--ink); }
.step-tabs { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.step-tab { border: 0; border-right: 1px solid var(--line); background: transparent; padding: 12px 8px; display: grid; justify-items: center; gap: 6px; cursor: pointer; color: var(--muted); font-size: 14.5px; line-height: 1.25; }
.step-tab:last-child { border-right: 0; }
.step-tab i { font: 600 12px/1 var(--mono); font-style: normal; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--line-2); background: var(--bg); color: var(--ink-2); }
.step-tab[aria-selected="true"] { background: color-mix(in srgb, var(--green-soft) 70%, var(--panel-2)); color: var(--ink); font-weight: 600; }
.step-tab[aria-selected="true"] i { background: var(--green); border-color: var(--green); color: var(--bg); }
.step-tab.done i { border-color: var(--green); color: var(--green); }
.scene-ctrl { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 14px; border-top: 1px solid var(--line); background: var(--bg); }
.lab-aside { display: grid; gap: 16px; }
.analogy { border-left: 4px solid var(--ink); padding: 4px 0 4px 18px; }
.analogy p:last-child { font-size: 18px; line-height: 1.55; margin-top: 10px; color: var(--ink); }
.step-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.step-list li { display: grid; grid-template-columns: 30px 1fr; gap: 8px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; font-size: 16px; line-height: 1.5; cursor: pointer; transition: background .25s, border-color .25s; color: var(--ink-2); }
.step-list li b { font: 600 14px/1.6 var(--mono); color: var(--green); }
.step-list li.is-on { border-color: var(--green); background: var(--green-soft); color: var(--ink); }
.claims-bar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 22px; }
.claims-sum { font-size: 14px; color: var(--ink-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; background: var(--panel); }
.claims-panel { margin-top: 14px; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.claims-legend { display: flex; flex-wrap: wrap; gap: 8px 18px; padding: 14px 16px; background: var(--panel); border-bottom: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.claims-legend span { display: inline-flex; gap: 8px; align-items: center; }
.claim { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 14px; padding: 16px; border-bottom: 1px solid var(--line); }
.claim:last-of-type { border-bottom: 0; }
.claim p { font-size: 15.5px; color: var(--ink); }
.claim small { display: block; color: var(--muted); font-size: 13.5px; margin-top: 6px; }
.claim .src { font: 500 12px/1.5 var(--mono); color: var(--muted); margin-top: 6px; }
.claim[data-ev="unresolved"] p { color: var(--ink-2); }
.claims-note { padding: 12px 16px; font-size: 13px; color: var(--muted); background: var(--panel); border-top: 1px solid var(--line); }
.lab-foot { display: grid; grid-template-columns: 1.3fr 1fr; gap: 16px; margin-top: 22px; }
.misread, .who { border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.misread { background: var(--amber-soft); border-color: color-mix(in srgb, var(--amber) 30%, transparent); }
.misread .mini-k { color: var(--amber); }
.misread p:last-child, .who p:last-child { margin-top: 8px; font-size: 15.5px; }
.who p:last-child { color: var(--ink-2); }
.lab-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 22px; }
.lab-nav .btn { max-width: 48%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: inline-block; line-height: 22px; }

/* Scene drawing classes (theme-aware) */
.k-box { fill: var(--svg-fill); stroke: var(--svg-stroke); stroke-width: 2; }
.k-soft { fill: var(--green-soft); stroke: var(--green); stroke-width: 2; }
.k-solid { fill: var(--green); stroke: none; }
.k-warm { fill: var(--amber-soft); stroke: var(--amber); stroke-width: 2; }
.k-hot { fill: var(--red-soft); stroke: var(--red); stroke-width: 2; }
.k-cell { fill: var(--green-soft); stroke: var(--green); stroke-width: 1.5; }
.k-wire { fill: none; stroke: var(--green); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.k-thin { stroke-width: 1.5; }
.k-mute { fill: none; stroke: var(--svg-stroke); stroke-width: 2; stroke-linecap: round; }
.k-flow { fill: none; stroke: var(--green); stroke-width: 3; stroke-dasharray: 9 7; stroke-linecap: round; }
.k-flow-warm { fill: none; stroke: var(--amber); stroke-width: 3; stroke-dasharray: 9 7; stroke-linecap: round; }
.k-dot { fill: var(--green); }
.k-t { font: 500 16px/1 var(--font); fill: var(--ink); text-anchor: middle; dominant-baseline: middle; }
.k-on { fill: var(--bg); }
.k-ts { font: 500 12px/1 var(--mono); fill: var(--muted); text-anchor: middle; dominant-baseline: middle; letter-spacing: .06em; }
.k-l { text-anchor: start; }
.k-arrow-head { fill: var(--green); }
.k-arrow-head-m { fill: var(--svg-stroke); }
.scene [data-s] { transition: opacity .45s ease; }
.scene svg[data-step="1"] [data-s="2"], .scene svg[data-step="1"] [data-s="3"], .scene svg[data-step="2"] [data-s="3"] { opacity: .12; }
.scene svg[data-step="1"] [data-s="1"], .scene svg[data-step="2"] [data-s="2"], .scene svg[data-step="3"] [data-s="3"] { animation: kpop .7s ease both; }
.scene [data-only] { opacity: 0; transition: opacity .3s; }
.scene svg[data-step="1"] [data-only="1"], .scene svg[data-step="2"] [data-only="2"], .scene svg[data-step="3"] [data-only="3"] { opacity: 1; }
.scene svg[data-step="1"] [data-s="1"] .k-flow, .scene svg[data-step="1"] .k-flow[data-s="1"], .scene svg[data-step="1"] [data-only="1"] .k-flow,
.scene svg[data-step="2"] [data-s="2"] .k-flow, .scene svg[data-step="2"] .k-flow[data-s="2"], .scene svg[data-step="2"] [data-only="2"] .k-flow,
.scene svg[data-step="3"] [data-s="3"] .k-flow, .scene svg[data-step="3"] .k-flow[data-s="3"], .scene svg[data-step="3"] [data-only="3"] .k-flow,
.scene svg[data-step="1"] [data-s="1"] .k-flow-warm, .scene svg[data-step="1"] .k-flow-warm[data-s="1"], .scene svg[data-step="1"] [data-only="1"] .k-flow-warm,
.scene svg[data-step="2"] [data-s="2"] .k-flow-warm, .scene svg[data-step="2"] .k-flow-warm[data-s="2"], .scene svg[data-step="2"] [data-only="2"] .k-flow-warm,
.scene svg[data-step="3"] [data-s="3"] .k-flow-warm, .scene svg[data-step="3"] .k-flow-warm[data-s="3"], .scene svg[data-step="3"] [data-only="3"] .k-flow-warm { animation: kdash .9s linear infinite; }
.scene svg[data-step="1"] [data-s="1"] .k-pulse, .scene svg[data-step="1"] .k-pulse[data-s="1"],
.scene svg[data-step="2"] [data-s="2"] .k-pulse, .scene svg[data-step="2"] .k-pulse[data-s="2"],
.scene svg[data-step="3"] [data-s="3"] .k-pulse, .scene svg[data-step="3"] .k-pulse[data-s="3"] { animation: kpulse 1.5s ease-in-out infinite; }
@keyframes kpop { from { opacity: .12; } to { opacity: 1; } }
@keyframes kdash { to { stroke-dashoffset: -32; } }
@keyframes kpulse { 50% { opacity: .55; } }

/* ---------- 04 Comparisons ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.chip { border: 1px solid var(--line-2); background: var(--bg); border-radius: 999px; padding: 0 16px; height: 40px; font-weight: 600; font-size: 14.5px; cursor: pointer; color: var(--ink-2); }
.chip:hover { border-color: var(--green); }
.chip[aria-selected="true"] { background: var(--green); border-color: var(--green); color: var(--bg); }
.cmp { border: 1px solid var(--line); border-radius: 18px; background: var(--bg); overflow: hidden; box-shadow: var(--shadow); }
.cmp-head { padding: 24px 24px 8px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: baseline; }
.cmp-head h3 { font-size: 26px; letter-spacing: -.02em; }
.cmp-head p { color: var(--muted); font-size: 16px; }
.cmp table { width: 100%; border-collapse: collapse; }
.cmp th, .cmp td { text-align: left; padding: 14px 24px; border-top: 1px solid var(--line); vertical-align: top; font-size: 15.5px; }
.cmp thead th { font-size: 16px; font-weight: 700; background: var(--panel); }
.cmp tbody th { font-weight: 600; color: var(--muted); width: 22%; font-size: 14.5px; }
.lvl { display: inline-flex; gap: 3px; margin-right: 8px; vertical-align: middle; }
.lvl i { width: 9px; height: 9px; border-radius: 50%; background: var(--line-2); }
.lvl i.on { background: var(--green); }
.cmp-bottom { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; align-items: baseline; padding: 18px 24px; background: var(--green-soft); border-top: 1px solid var(--line); }
.cmp-bottom p:nth-child(2) { font-size: 17px; font-weight: 600; }
.cmp-links { padding: 14px 24px 18px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }

/* ---------- 05 Scenarios ---------- */
.scen { display: grid; grid-template-columns: 330px minmax(0, 1fr); gap: 24px; align-items: start; }
.scen-list { display: grid; gap: 8px; }
.scen-tab { text-align: left; border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; background: var(--bg); cursor: pointer; display: grid; grid-template-columns: 30px 1fr; gap: 4px 8px; align-content: start; }
.scen-tab span { font: 600 13px/1.5 var(--mono); color: var(--green); }
.scen-tab strong { font-size: 16px; line-height: 1.35; }
.scen-tab small { grid-column: 2; color: var(--muted); font-size: 13.5px; line-height: 1.4; }
.scen-tab:hover { border-color: var(--green); }
.scen-tab[aria-selected="true"] { border-color: var(--green); background: var(--green-soft); box-shadow: inset 3px 0 0 var(--green); }
.scen-out { border: 1px solid var(--line); border-radius: 18px; background: var(--bg); padding: 24px; display: grid; gap: 18px; box-shadow: var(--shadow); min-width: 0; }
.scen-trig { display: grid; gap: 6px; }
.scen-trig h3 { font-size: 24px; letter-spacing: -.02em; line-height: 1.2; }
.scen-trig p { color: var(--ink-2); font-size: 16px; }
.scen-ctrl { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.scen-ctrl .seg { margin: 0; }
.scen-ctrl .seg button { height: 36px; padding: 0 12px; font-size: 14px; }
.scen-size-k { font-size: 14px; color: var(--muted); font-weight: 600; }
.scen-rows { display: grid; gap: 6px; }
.srow { display: grid; grid-template-columns: minmax(0, 210px) minmax(0, 1fr) 74px; gap: 4px 14px; align-items: center; padding: 9px 12px; border-radius: 10px; border: 1px solid var(--line); transition: background .4s, border-color .4s; }
.srow-name { font-weight: 600; font-size: 14.5px; line-height: 1.25; }
.srow-name small { display: block; font: 500 11.5px/1.3 var(--mono); color: var(--muted); }
.srow-bars { display: grid; gap: 4px; }
.srow-bars .bar { height: 7px; }
.srow-bars .bar.before > i { background: var(--line-2); }
.srow-d { text-align: right; font: 600 13px/1.2 var(--mono); color: var(--muted); }
.srow-d b { display: block; font-family: var(--font); font-size: 18px; color: var(--ink); }
.srow-why { grid-column: 1 / -1; font-size: 13.5px; color: var(--ink-2); max-height: 0; overflow: hidden; opacity: 0; transition: max-height .4s, opacity .4s; }
.srow.hit { border-color: var(--green); }
.srow.hit .srow-why { max-height: 80px; opacity: 1; }
.srow.up { background: color-mix(in srgb, var(--red-soft) 60%, transparent); border-color: color-mix(in srgb, var(--red) 40%, transparent); }
.srow.dn { background: color-mix(in srgb, var(--green-soft) 70%, transparent); }
.srow.top-now { box-shadow: inset 4px 0 0 var(--red); }
.up-t { color: var(--red); } .dn-t { color: var(--green); }
.scen-result { border-radius: 14px; padding: 16px 18px; background: var(--panel); border: 1px solid var(--line); display: grid; gap: 4px; }
.scen-result b { font-size: 18px; }
.scen-result.moved { background: var(--red-soft); border-color: color-mix(in srgb, var(--red) 30%, transparent); }
.scen-result.moved b { color: var(--red); }
.scen-read { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.scen-read > div { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.scen-read p:last-child { margin-top: 8px; font-size: 15px; color: var(--ink-2); }
.scen-read ul { margin: 8px 0 0; padding-left: 18px; font-size: 15px; color: var(--ink-2); }
.scen-disc { font-size: 13px; color: var(--muted); }
.legend-row { display: flex; gap: 14px; font-size: 12px; color: var(--muted); align-items: center; flex-wrap: wrap; }
.legend-row i { display: inline-block; width: 18px; height: 7px; border-radius: 9px; vertical-align: middle; margin-right: 5px; background: var(--line-2); }
.legend-row i.a { background: var(--green); }

/* ---------- Footer ---------- */
.foot { border-top: 1px solid var(--line); padding: 40px 0 56px; background: var(--bg); }
.foot-in { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 24px 48px; align-items: start; }
.foot-h { font-weight: 700; font-size: 17px; }
.foot-note { color: var(--muted); font-size: 14px; margin-top: 8px; max-width: 34em; }
.foot-links { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 10px; justify-content: flex-end; }
.foot-links a { display: inline-flex; align-items: center; height: 36px; padding: 0 12px; border-radius: 8px; border: 1px solid var(--line); text-decoration: none; color: var(--ink-2); font-size: 14px; font-weight: 500; }
.foot-links a:hover { border-color: var(--green); color: var(--green); }

/* ---------- Guided run coach ---------- */
.coach { position: fixed; right: 24px; bottom: 24px; width: 380px; z-index: 60; background: var(--bg); border: 1px solid var(--line-2); border-radius: 16px; box-shadow: 0 20px 50px rgba(0, 0, 0, .22); padding: 18px 18px 16px; display: grid; gap: 10px; }
.coach[hidden] { display: none; }
.coach-top { display: flex; justify-content: space-between; align-items: center; }
.coach-bar { height: 4px; border-radius: 9px; background: var(--panel-2); overflow: hidden; }
.coach-bar span { display: block; height: 100%; background: var(--green); transition: width .4s; }
.coach h3 { font-size: 20px; letter-spacing: -.01em; }
.coach p { color: var(--ink-2); font-size: 15px; }
.coach-nav { display: flex; justify-content: space-between; gap: 10px; margin-top: 4px; }
.coach-nav .btn { flex: 1; min-height: 42px; }
.coach-decide { display: grid; gap: 8px; }
.coach-decide .q { font-weight: 600; font-size: 14.5px; }
.coach-decide .call { width: 100%; }
.coach-decide .call button { flex: 1; height: 42px; font-size: 13.5px; }
.coach-decide .after { font-size: 14px; color: var(--ink); background: var(--green-soft); border-radius: 10px; padding: 10px 12px; }
.tour-hl { animation: hl 1.6s ease-in-out 3; outline: 3px solid var(--green) !important; outline-offset: 4px; border-radius: 12px; }
@keyframes hl { 50% { outline-color: color-mix(in srgb, var(--green) 25%, transparent); } }

/* ---------- 404 ---------- */
.nf { min-height: 60vh; display: grid; place-items: center; text-align: center; padding: 80px 16px; }
.nf h1 { font-size: 44px; letter-spacing: -.03em; margin: 14px 0; }
.nf p { color: var(--muted); margin-bottom: 24px; }

/* ---------- Responsive ---------- */
@media (max-width: 1240px) {
  .top-in { display: grid; grid-template-columns: auto auto minmax(0, 1fr) auto; grid-template-areas: "brand rule proj tools" "nav nav nav nav"; row-gap: 6px; padding-bottom: 6px; }
  .brand { grid-area: brand; } .brand-rule { grid-area: rule; } .proj { grid-area: proj; } .tools { grid-area: tools; }
  .pill { grid-area: proj; justify-self: end; margin-right: 8px; }
  .nav { grid-area: nav; margin: 0 -8px; overflow-x: auto; scrollbar-width: none; }
  .nav::-webkit-scrollbar { display: none; }
  html { scroll-padding-top: 124px; }
  .layer-detail { top: 136px; }
}
@media (max-width: 1100px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .flow-card { max-width: 640px; }
  .lab { grid-template-columns: 270px minmax(0, 1fr); }
  .lab-body { grid-template-columns: 1fr; }
  .lab-main { padding: 28px; }
  .layer { grid-template-columns: 46px minmax(0, 1fr) 140px; }
  .layer-tech { display: none; }
  .sig-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ind-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .scen { grid-template-columns: 280px minmax(0, 1fr); }
}
@media (max-width: 860px) {
  .wrap { padding: 0 20px; }
  .top-in { padding-left: 20px; padding-right: 20px; }
  .sec { padding: 64px 0; }
  .sec-head { grid-template-columns: 1fr; margin-bottom: 26px; }
  .sec-side { font-size: 16px; }
  .map-grid { grid-template-columns: 1fr; }
  .layer-detail { position: static; }
  .lab { grid-template-columns: 1fr; }
  .lab-side { display: none; }
  .topic-pick { display: grid; gap: 6px; margin-bottom: 20px; font-size: 13px; color: var(--muted); font-weight: 600; }
  .topic-pick select { width: 100%; height: 46px; border-radius: 10px; border: 1px solid var(--line-2); background: var(--bg); color: var(--ink); font: 600 16px var(--font); padding: 0 12px; }
  .scen { grid-template-columns: 1fr; }
  .scen-list { grid-auto-flow: column; grid-auto-columns: minmax(230px, 78%); overflow-x: auto; padding-bottom: 6px; scroll-snap-type: x mandatory; }
  .scen-tab { scroll-snap-align: start; }
  .foot-in { grid-template-columns: 1fr; }
  .foot-links { justify-content: flex-start; }
}
@media (max-width: 640px) {
  body { font-size: 15px; }
  .wrap { padding: 0 16px; }
  .top-in { display: flex; flex-wrap: wrap; align-items: center; padding: 8px 16px 6px; gap: 6px 10px; min-height: 0; }
  .brand { order: 1; } .proj { order: 2; flex: 1 1 auto; min-width: 0; } .tools { order: 3; }
  .nav { order: 5; flex: 1 1 0; min-width: 0; }
  .brand-words, .brand-rule { display: none; }
  .brand-d { font-size: 30px; }
  .proj { font-size: 15px; overflow: hidden; text-overflow: ellipsis; }
  .pill { order: 4; margin: 0; height: 24px; font-size: 11.5px; padding: 0 8px; }
  .nav { margin: 0; }
  .nav a { padding: 7px 9px; font-size: 14px; }
  .tools { gap: 6px; }
  .lang { height: 40px; padding: 2px; }
  .lang button { min-width: 36px; padding: 0 6px; font-size: 13px; }
  .icon-btn { width: 40px; height: 40px; }
  html { scroll-padding-top: 108px; }
  .hero { padding: 36px 0 44px; }
  .hero h1 { font-size: 36px; }
  .is-zh .hero h1 { font-size: 32px; }
  .lede { font-size: 16.5px; }
  .cta-row .btn { width: 100%; }
  .stats { gap: 8px 18px; }
  .stats b { font-size: 22px; }
  .flow-card { padding: 16px 12px; }
  .sec { padding: 52px 0; }
  .sec-head h2 { font-size: 30px; }
  .ind-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .ind { padding: 14px; }
  .ind-val b { font-size: 26px; }
  .ind-name { font-size: 13.5px; }
  .ind-ill { display: none; }
  .sig-list { grid-template-columns: 1fr; }
  .layer { grid-template-columns: 40px minmax(0, 1fr) 96px; padding: 11px 12px; gap: 10px; }
  .layer-name { font-size: 15px; }
  .layer-sub { font-size: 12px; }
  .layer-detail { padding: 18px; }
  .drivers, .ld-io { grid-template-columns: 1fr 1fr; }
  .lab { border: 0; border-radius: 0; box-shadow: none; background: transparent; overflow: visible; }
  .lab-main { padding: 0; }
  .lab-one { font-size: 16px; }
  .scene { padding: 6px 4px 0; }
  .scene-top { padding: 12px 14px 0; font-size: 11px; }
  .step-tab { font-size: 12.5px; padding: 10px 4px; }
  .scene-ctrl { grid-template-columns: 1fr 1fr; padding: 10px; }
  .scene-ctrl .btn { padding: 8px 10px; font-size: 14px; }
  .analogy p:last-child { font-size: 16px; }
  .step-list li { font-size: 15px; padding: 12px; }
  .claim { grid-template-columns: 1fr; gap: 8px; }
  .lab-foot { grid-template-columns: 1fr; }
  .lab-nav .btn { font-size: 13px; padding: 8px 10px; }
  .cmp-head { padding: 18px 16px 6px; }
  .cmp-head h3 { font-size: 21px; }
  .cmp table, .cmp tbody, .cmp tr, .cmp th, .cmp td { display: block; width: 100%; }
  .cmp thead { display: none; }
  .cmp tbody tr { border-top: 1px solid var(--line); padding: 12px 16px; }
  .cmp tbody th { width: 100%; padding: 0 0 6px; border: 0; }
  .cmp td { border: 0; padding: 4px 0; font-size: 15px; }
  .cmp td::before { content: attr(data-col); display: block; font: 600 11.5px/1.4 var(--mono); color: var(--green); letter-spacing: .04em; }
  .cmp-bottom { grid-template-columns: 1fr; padding: 16px; }
  .cmp-links { padding: 12px 16px 16px; }
  .scen-out { padding: 16px; }
  .scen-trig h3 { font-size: 20px; }
  .srow { grid-template-columns: minmax(0, 1fr) 62px; padding: 9px 10px; }
  .srow-bars { grid-column: 1 / -1; grid-row: 2; }
  .srow-why { grid-row: 3; }
  .scen-read { grid-template-columns: 1fr; }
  .coach { left: 8px; right: 8px; bottom: 8px; width: auto; padding: 14px; gap: 8px; }
  .coach h3 { font-size: 18px; }
  .coach p { font-size: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .scene [data-s], .scene [data-only] { transition: none !important; animation: none !important; }
  .k-flow, .k-flow-warm, .k-pulse { animation: none !important; }
  .tour-hl { animation: none; }
  .bar > i { transition: none; }
}
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.btn:disabled { opacity: .4; cursor: default; }
.btn:disabled:hover { border-color: var(--line-2); }