:root {
  --ink: #11110f;
  --ink-soft: #34342f;
  --paper: #f7f7f2;
  --paper-bright: #ffffff;
  --muted: #deded5;
  --line: #c9c9bf;
  --lime: #d8ff36;
  --cyan: #65e8e0;
  --coral: #ff7866;
  --yellow: #ffd84d;
  --shell: 1220px;
  --header-h: 72px;
  --radius: 6px;
  --font-sans: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  --font-display: Impact, "Arial Black", "Microsoft YaHei", sans-serif;
  --font-mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}
body.nav-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img, svg { display: block; }
svg:not(.ladder-svg) { fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }
.icon { width: 20px; height: 20px; flex: 0 0 auto; }
.shell { width: min(calc(100% - 48px), var(--shell)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 300; top: -70px; left: 16px; padding: 10px 14px; color: #fff; background: var(--ink); }
.skip-link:focus { top: 12px; }
:focus-visible { outline: 3px solid var(--coral); outline-offset: 3px; }

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  height: var(--header-h);
  border-bottom: 1px solid rgba(255,255,255,.18);
  color: #fff;
  background: rgba(17,17,15,.96);
  backdrop-filter: blur(14px);
}
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; min-height: 48px; align-items: center; gap: 12px; }
.brand img { width: 42px; height: 42px; border-radius: var(--radius); }
.brand-copy { display: grid; line-height: 1.05; }
.brand-copy strong { font-size: 16px; }
.brand-copy small { margin-top: 7px; color: #aaa; font-family: var(--font-mono); font-size: 9px; font-weight: 700; }
.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav > a { position: relative; min-height: 44px; display: inline-flex; align-items: center; color: #d6d6d0; font-size: 14px; font-weight: 700; transition: color 180ms ease; }
.site-nav > a:not(.nav-cta)::after { position: absolute; right: 0; bottom: 5px; left: 0; height: 2px; background: var(--lime); content: ""; transform: scaleX(0); transform-origin: left; transition: transform 180ms ease; }
.site-nav > a:hover { color: #fff; }
.site-nav > a:hover::after { transform: scaleX(1); }
.nav-cta { gap: 8px; min-height: 46px !important; padding: 0 16px; color: var(--ink) !important; background: var(--lime); border-radius: 4px; }
.nav-cta:hover { background: #efffa7; }
.nav-toggle { display: none; width: 48px; height: 48px; align-items: center; justify-content: center; border: 1px solid #555; color: #fff; background: transparent; border-radius: 4px; cursor: pointer; }

.hero { position: relative; overflow: hidden; color: #fff; background: var(--ink); }
.hero-grid { position: absolute; inset: 0; opacity: .13; }
.hero-grid::before, .hero-grid::after { position: absolute; content: ""; background: #fff; }
.hero-grid::before { top: 0; bottom: 0; left: 12%; width: 1px; box-shadow: 18vw 0 0 #fff, 36vw 0 0 #fff, 54vw 0 0 #fff, 72vw 0 0 #fff; }
.hero-grid::after { right: 0; bottom: 13%; left: 0; height: 1px; box-shadow: 0 -170px 0 #fff, 0 -340px 0 #fff; }
.hero-inner { position: relative; display: grid; min-height: min(680px, calc(100svh - var(--header-h))); grid-template-columns: .9fr 1.1fr; align-items: center; gap: 56px; padding-block: 48px; }
.hero-copy { position: relative; z-index: 2; }
.hero-kicker { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; }
.hero-kicker span { padding: 6px 9px; border: 1px solid #585852; color: #d2d2cb; font-family: var(--font-mono); font-size: 10px; font-weight: 700; text-transform: uppercase; }
.brand-signal { margin: 0 0 4px; color: var(--lime); font-size: 18px; font-weight: 900; }
.hero h1 { margin: 0; font-family: var(--font-display); font-size: clamp(68px, 8vw, 120px); font-weight: 900; line-height: .82; text-transform: uppercase; }
.hero h1 span { color: transparent; -webkit-text-stroke: 2px #fff; }
.hero-lead { max-width: 560px; margin: 28px 0 0; color: #c4c4bd; font-size: 18px; line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; gap: 10px; padding: 11px 18px; border: 1px solid transparent; border-radius: 4px; font-size: 14px; font-weight: 800; cursor: pointer; transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease; }
.button--lime { color: var(--ink); background: var(--lime); }
.button--lime:hover { background: #efffa7; }
.button--ghost { color: #fff; border-color: #5b5b54; background: transparent; }
.button--ghost:hover { border-color: #fff; }
.button--dark { color: #fff; background: var(--ink); }
.button--dark:hover { background: #33332e; }
.hero-note { display: flex; align-items: center; gap: 8px; margin: 22px 0 0; color: #999991; font-size: 12px; }
.hero-note .icon { width: 17px; height: 17px; color: var(--lime); }

.ladder-demo { position: relative; z-index: 2; width: min(100%, 560px); justify-self: end; padding: 24px; border: 1px solid #484842; background: #181816; box-shadow: 18px 18px 0 var(--lime); }
.demo-heading { display: flex; justify-content: space-between; gap: 20px; }
.demo-heading span { color: #8e8e87; font-family: var(--font-mono); font-size: 9px; font-weight: 700; }
.demo-heading h2 { max-width: 320px; margin: 7px 0 0; font-size: 20px; line-height: 1.4; }
.live-dot { display: inline-flex; height: 26px; align-items: center; gap: 7px; padding: 0 8px; border: 1px solid #42423d; }
.live-dot::before { width: 7px; height: 7px; border-radius: 50%; background: var(--lime); content: ""; box-shadow: 0 0 0 4px rgba(216,255,54,.12); }
.start-buttons { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 20px 20px 0; }
.start-button { min-width: 44px; min-height: 44px; border: 1px solid #4a4a44; color: #cfcfc8; background: #22221f; border-radius: 3px; font-family: var(--font-mono); font-weight: 800; cursor: pointer; transition: border-color 180ms ease, background-color 180ms ease, color 180ms ease; }
.start-button:hover { border-color: var(--lime); }
.start-button.is-active { color: var(--ink); border-color: var(--lime); background: var(--lime); }
.ladder-stage { max-width: 366px; margin: 4px auto 0; }
.ladder-svg { width: 100%; height: 315px; overflow: visible; }
.ladder-base { fill: none; stroke: #5d5d56; stroke-width: 4; stroke-linecap: square; }
.active-path { fill: none; stroke: var(--lime); stroke-width: 6; stroke-linecap: square; stroke-linejoin: round; filter: drop-shadow(0 0 5px rgba(216,255,54,.4)); }
.path-head { fill: var(--coral); stroke: #181816; stroke-width: 4; }
.ladder-demo.is-running .active-path { stroke-dasharray: 1000; stroke-dashoffset: 1000; animation: trace-path 950ms ease forwards; }
.ladder-demo.is-running .path-head { animation: head-pulse 500ms ease 2; }
.result-row { display: grid; grid-template-columns: repeat(4, 1fr); margin: -9px 20px 0; gap: 12px; }
.result-row span { display: grid; height: 32px; place-items: center; color: #9c9c94; background: #252522; font-family: var(--font-mono); font-size: 11px; font-weight: 700; }
.demo-result { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 16px; margin-top: 20px; padding-top: 18px; border-top: 1px solid #3c3c37; }
.demo-result > span { color: #8e8e87; font-size: 11px; }
.demo-result strong { font-family: var(--font-mono); font-size: 21px; }
.demo-result strong b { color: var(--lime); }
.rerun-button { min-height: 44px; display: inline-flex; align-items: center; gap: 7px; border: 0; color: #fff; background: transparent; font-size: 12px; font-weight: 800; cursor: pointer; }
.rerun-button:hover { color: var(--lime); }
.rerun-button .icon { width: 16px; height: 16px; }

.ticker { overflow: hidden; border-block: 1px solid var(--ink); background: var(--lime); }
.ticker-track { width: max-content; display: flex; align-items: center; gap: 28px; padding: 12px 24px; animation: ticker 24s linear infinite; font-family: var(--font-mono); font-size: 12px; font-weight: 900; text-transform: uppercase; }
.ticker-track i { width: 7px; height: 7px; background: var(--ink); transform: rotate(45deg); }

.section { padding: 104px 0; }
.section-index { display: block; margin-bottom: 15px; color: #65655e; font-family: var(--font-mono); font-size: 11px; font-weight: 800; }
.section-intro { max-width: 760px; margin-bottom: 48px; }
.section-intro h2, .probability-copy h2, .article-content > h2 { margin: 0; font-size: clamp(38px, 5vw, 64px); line-height: 1.08; }
.section-intro > p { max-width: 650px; margin: 20px 0 0; color: #55554f; font-size: 17px; }
.section-intro--row { max-width: none; display: flex; align-items: end; justify-content: space-between; gap: 40px; }
.section-intro--row > p { max-width: 420px; margin-bottom: 8px; }

.rules-section { background: var(--paper); }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--ink); }
.step { position: relative; padding: 32px; border-right: 1px solid var(--ink); }
.step:last-child { border-right: 0; }
.step-number { position: absolute; top: 20px; right: 24px; color: #77776f; font-family: var(--font-mono); font-size: 11px; font-weight: 800; }
.step h3 { margin: 25px 0 10px; font-size: 22px; }
.step p { margin: 0; color: #585852; font-size: 14px; }
.step-art { position: relative; height: 150px; overflow: hidden; background: #e7e7df; }
.step-art--pick { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; padding: 40px 24px; background: var(--muted); }
.step-art--pick i { display: grid; place-items: center; border: 1px solid var(--ink); background: var(--paper); font-family: var(--font-mono); font-size: 14px; font-style: normal; font-weight: 900; }
.step-art--pick i:first-child { color: var(--ink); background: var(--lime); }
.step-art--trace { display: flex; justify-content: space-around; padding-inline: 30px; }
.step-art--trace i { width: 3px; height: 100%; background: #999991; }
.step-art--trace::before, .step-art--trace::after { position: absolute; height: 3px; background: #999991; content: ""; }
.step-art--trace::before { top: 52px; left: 29%; width: 24%; }
.step-art--trace::after { top: 96px; left: 52%; width: 24%; }
.step-art--trace b { position: absolute; z-index: 2; top: 0; left: 28%; width: 4px; height: 52px; background: var(--coral); box-shadow: 48px 52px 0 var(--coral), 96px 52px 0 var(--coral), 96px 96px 0 var(--coral), 144px 96px 0 var(--coral), 144px 150px 0 var(--coral); }
.step-art--result { display: grid; place-items: center; background: var(--cyan); }
.step-art--result i { font-family: var(--font-display); font-size: 72px; font-style: normal; line-height: 1; }
.step-art--result b { position: absolute; right: 0; bottom: 0; padding: 5px 9px; color: #fff; background: var(--ink); font-family: var(--font-mono); font-size: 9px; }

.articles-section { color: #fff; background: var(--ink); }
.articles-section .section-index, .articles-section .section-intro--row > p { color: #989890; }
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.filter-button { min-height: 44px; padding: 8px 14px; border: 1px solid #4b4b45; color: #bdbdb5; background: transparent; border-radius: 3px; font-size: 13px; font-weight: 800; cursor: pointer; transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease; }
.filter-button:hover { color: #fff; border-color: #fff; }
.filter-button.is-active { color: var(--ink); border-color: var(--lime); background: var(--lime); }
.article-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: #4a4a44; border: 1px solid #4a4a44; }
.article-card { display: grid; min-height: 330px; grid-template-columns: 42% 58%; color: var(--ink); background: var(--paper); }
.article-card[hidden] { display: none; }
.article-visual { position: relative; min-height: 100%; overflow: hidden; padding: 20px; }
.article-visual span { position: relative; z-index: 2; font-family: var(--font-display); font-size: clamp(24px, 3vw, 42px); line-height: .92; }
.article-visual b { position: absolute; right: 15px; bottom: 8px; font-family: var(--font-display); font-size: 80px; line-height: 1; opacity: .16; }
.article-visual i { position: absolute; right: -18px; bottom: -40px; width: 120px; height: 190px; border: 14px solid var(--ink); transform: rotate(25deg); }
.article-visual--yellow { background: var(--yellow); }
.article-visual--cyan { background: var(--cyan); }
.article-visual--coral { background: var(--coral); }
.article-visual--lime { background: var(--lime); }
.article-visual--paper { background: #e8e8df; }
.article-visual--ink { color: #fff; background: #3a3a34; }
.article-visual--ink i { border-color: var(--lime); }
.article-body { display: flex; flex-direction: column; padding: 28px; }
.article-meta { display: flex; justify-content: space-between; gap: 12px; color: #696961; font-family: var(--font-mono); font-size: 9px; font-weight: 800; }
.article-body h3 { margin: 32px 0 12px; font-size: 23px; line-height: 1.35; }
.article-body p { margin: 0 0 20px; color: #606059; font-size: 14px; }
.article-body a { width: fit-content; display: inline-flex; min-height: 44px; align-items: center; gap: 7px; margin-top: auto; font-size: 13px; font-weight: 900; }
.article-body a:hover { color: #696961; }
.article-body a .icon { width: 17px; height: 17px; }

.guide-section { background: var(--paper-bright); }
.guide-section--alt { background: #ededE5; }
.article-layout { display: grid; grid-template-columns: 190px minmax(0, 760px); justify-content: center; gap: 90px; }
.article-aside { align-self: start; position: sticky; top: 104px; padding-top: 12px; font-family: var(--font-mono); }
.article-aside > span { color: #77776f; font-size: 10px; font-weight: 800; }
.article-aside p { margin: 28px 0 0; color: #77776f; font-size: 10px; }
.article-aside strong { display: block; margin-top: 3px; font-size: 14px; }
.aside-line { height: 1px; margin-top: 28px; background: var(--line); }
.article-label { width: fit-content; margin: 0 0 18px; padding: 6px 9px; color: var(--ink); background: var(--lime); font-family: var(--font-mono); font-size: 10px; font-weight: 900; }
.article-content > h2 { max-width: 700px; }
.article-deck { margin: 26px 0 48px; color: #4c4c46; font-size: 20px; line-height: 1.7; }
.article-copy { max-width: 680px; }
.article-copy h3 { margin: 42px 0 13px; font-size: 23px; }
.article-copy p { margin: 0; color: #44443f; font-size: 17px; line-height: 1.9; }
.article-copy strong { color: var(--ink); }
.article-copy ol { display: grid; gap: 12px; margin: 22px 0 0; padding-left: 24px; color: #44443f; font-size: 17px; line-height: 1.8; }
.article-copy blockquote { margin: 42px 0; padding: 27px 30px; border-left: 6px solid var(--coral); background: #efefe8; font-size: 21px; font-weight: 900; }
.article-toc { display: grid; grid-template-columns: 1fr; gap: 1px; margin-bottom: 44px; border-block: 1px solid var(--line); }
.article-toc strong, .article-toc a { min-height: 46px; display: flex; align-items: center; padding: 8px 12px; border-bottom: 1px solid var(--line); }
.article-toc strong { color: #77776f; font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; }
.article-toc a { font-size: 14px; font-weight: 800; transition: color 180ms ease, background-color 180ms ease; }
.article-toc a:last-child { border-bottom: 0; }
.article-toc a:hover { color: var(--ink); background: var(--lime); }
.article-summary { margin: 38px 0; padding: 24px 26px; border-left: 6px solid var(--cyan); background: var(--ink); color: #fff; }
.article-summary strong { color: var(--cyan); font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; }
.article-summary p { margin-top: 10px; color: #e5e5df; font-size: 16px; line-height: 1.75; }
.data-table-wrap { max-width: 100%; overflow-x: auto; margin: 30px 0 40px; border: 1px solid var(--ink); overscroll-behavior-inline: contain; }
.data-table-wrap:focus-visible { outline: 3px solid var(--coral); outline-offset: 3px; }
.data-table { width: 100%; min-width: 660px; border-collapse: collapse; background: var(--paper-bright); font-size: 14px; line-height: 1.55; }
.data-table th, .data-table td { padding: 15px 16px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.data-table tr > :last-child { border-right: 0; }
.data-table tbody tr:last-child > * { border-bottom: 0; }
.data-table thead th { color: #fff; background: var(--ink); font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; }
.data-table tbody th { width: 110px; background: var(--lime); font-weight: 900; }

.probability-section { color: #fff; background: #202d2b; }
.probability-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 80px; align-items: start; }
.probability-copy .section-index { color: var(--cyan); }
.probability-copy h2 { font-family: var(--font-display); font-size: clamp(52px, 7vw, 88px); text-transform: uppercase; }
.probability-copy > p { max-width: 540px; margin: 28px 0 0; color: #c0d0cc; font-size: 17px; }
.check-list { display: grid; gap: 13px; margin: 30px 0 0; padding: 0; list-style: none; }
.check-list li { display: flex; align-items: flex-start; gap: 10px; color: #e4eeeb; }
.check-list .icon { margin-top: 3px; color: var(--cyan); }
.myth-board { border-top: 1px solid #6a7875; }
.myth-head { display: grid; grid-template-columns: 1fr auto; gap: 20px; padding: 14px 0; color: #9baaa7; font-family: var(--font-mono); font-size: 10px; font-weight: 800; }
.myth-row { position: relative; display: grid; grid-template-columns: 1fr auto; gap: 12px 20px; padding: 26px 0; border-top: 1px solid #53605d; }
.myth-row strong { font-size: 17px; }
.myth-row > span { height: 28px; padding: 4px 8px; color: var(--ink); background: var(--coral); font-size: 11px; font-weight: 900; }
.myth-row > span.is-true { background: var(--cyan); }
.myth-row p { grid-column: 1 / -1; margin: 0; color: #9fadaa; font-size: 14px; }

.faq-section { background: var(--yellow); }
.faq-layout { display: grid; grid-template-columns: .65fr 1.35fr; gap: 88px; }
.faq-list { border-top: 2px solid var(--ink); }
.faq-list details { border-bottom: 1px solid rgba(17,17,15,.55); }
.faq-list summary { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 17px 0; font-size: 17px; font-weight: 900; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary .icon { transition: transform 180ms ease; }
.faq-list details[open] summary .icon { transform: rotate(180deg); }
.faq-list details p { max-width: 720px; margin: 0; padding: 0 46px 22px 0; color: #55544b; }

.closing-band { border-bottom: 1px solid #3c3c37; color: #fff; background: var(--ink); }
.closing-inner { min-height: 260px; display: flex; align-items: center; justify-content: space-between; gap: 40px; padding-block: 48px; }
.closing-inner span { color: var(--lime); font-family: var(--font-mono); font-size: 10px; font-weight: 900; }
.closing-inner h2 { margin: 8px 0 0; font-size: clamp(42px, 6vw, 76px); line-height: 1; }
.closing-inner .button { color: var(--ink); background: var(--lime); }
.closing-inner .button:hover { background: #efffa7; }

.site-footer { color: #b4b4ad; background: var(--ink); }
.footer-main { display: grid; grid-template-columns: 1fr 1fr auto; align-items: center; gap: 50px; padding-block: 54px; }
.brand--footer { color: #fff; }
.footer-main > p { max-width: 420px; margin: 0; font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; font-size: 12px; font-weight: 700; }
.footer-links a:hover { color: var(--lime); }
.footer-bottom { display: flex; justify-content: space-between; gap: 30px; padding-block: 18px; border-top: 1px solid #3c3c37; color: #77776f; font-family: var(--font-mono); font-size: 9px; }

.js [data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity 450ms ease, transform 450ms ease; }
.js [data-reveal].is-visible { opacity: 1; transform: none; }

@keyframes trace-path { to { stroke-dashoffset: 0; } }
@keyframes head-pulse { 50% { r: 10; } }
@keyframes ticker { to { transform: translateX(-50%); } }

@media (max-width: 980px) {
  .site-nav { gap: 18px; }
  .site-nav > a { font-size: 12px; }
  .hero-inner { grid-template-columns: .85fr 1.15fr; gap: 30px; }
  .hero h1 { font-size: 74px; }
  .ladder-demo { padding: 20px; box-shadow: 10px 10px 0 var(--lime); }
  .article-card { grid-template-columns: 38% 62%; }
  .probability-layout { gap: 50px; }
  .faq-layout { grid-template-columns: 1fr 1.5fr; gap: 50px; }
}

@media (max-width: 820px) {
  :root { --header-h: 64px; }
  .shell { width: min(calc(100% - 32px), var(--shell)); }
  .site-header { height: var(--header-h); }
  .brand img { width: 38px; height: 38px; }
  .nav-toggle { display: inline-flex; }
  .site-nav { position: fixed; inset: var(--header-h) 0 auto; display: grid; align-content: start; gap: 0; padding: 12px 16px 24px; border-bottom: 1px solid #4b4b45; background: var(--ink); opacity: 0; pointer-events: none; transform: translateY(-10px); transition: opacity 180ms ease, transform 180ms ease; }
  .site-nav[data-open="true"] { opacity: 1; pointer-events: auto; transform: none; }
  .site-nav > a { min-height: 54px; padding-inline: 8px; border-bottom: 1px solid #34342f; font-size: 15px; }
  .site-nav > a::after { display: none; }
  .nav-cta { justify-content: center; margin-top: 12px; border-bottom: 0 !important; }
  .hero-inner { min-height: auto; grid-template-columns: 1fr; gap: 42px; padding-block: 44px 58px; }
  .hero h1 { font-size: clamp(64px, 19vw, 98px); }
  .hero-lead { font-size: 16px; }
  .ladder-demo { width: calc(100% - 10px); justify-self: start; }
  .section { padding: 80px 0; }
  .steps-grid { grid-template-columns: 1fr; }
  .step { display: grid; grid-template-columns: 180px 1fr; column-gap: 28px; border-right: 0; border-bottom: 1px solid var(--ink); }
  .step:last-child { border-bottom: 0; }
  .step-art { grid-row: 1 / span 3; }
  .step h3 { align-self: end; margin-top: 46px; }
  .section-intro--row { align-items: start; flex-direction: column; gap: 4px; }
  .article-grid { grid-template-columns: 1fr; }
  .article-layout { grid-template-columns: 140px minmax(0, 1fr); gap: 48px; }
  .probability-layout, .faq-layout { grid-template-columns: 1fr; gap: 54px; }
  .probability-copy h2 { font-size: 64px; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .footer-links { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .shell { width: min(calc(100% - 24px), var(--shell)); }
  .brand-copy strong { font-size: 14px; }
  .brand-copy small { font-size: 8px; }
  .hero-grid { background-size: 48px 48px; }
  .hero-inner { gap: 34px; padding-top: 32px; }
  .hero-kicker { margin-bottom: 20px; }
  .hero h1 { font-size: clamp(59px, 20vw, 78px); }
  .hero-lead { margin-top: 22px; }
  .hero-actions { display: grid; }
  .button { width: 100%; }
  .hero-note { align-items: flex-start; }
  .ladder-demo { padding: 16px 12px; box-shadow: 8px 8px 0 var(--lime); }
  .demo-heading { padding-inline: 4px; }
  .demo-heading h2 { font-size: 17px; }
  .live-dot { display: none; }
  .start-buttons, .result-row { margin-inline: 10px; gap: 8px; }
  .ladder-svg { height: 270px; }
  .demo-result { grid-template-columns: 1fr auto; gap: 8px; }
  .demo-result > span { grid-column: 1 / -1; }
  .demo-result strong { font-size: 18px; }
  .section { padding: 68px 0; }
  .section-intro { margin-bottom: 34px; }
  .section-intro h2, .article-content > h2 { font-size: 36px; }
  .section-intro > p { font-size: 15px; }
  .steps-grid { border-block: 0; gap: 1px; background: var(--ink); }
  .step { display: block; padding: 20px; border: 0; background: var(--paper); }
  .step-art { height: 132px; }
  .step h3 { margin: 22px 0 8px; }
  .filter-bar { display: grid; grid-template-columns: repeat(2, 1fr); }
  .article-card { min-height: auto; grid-template-columns: 1fr; }
  .article-visual { min-height: 190px; }
  .article-body { min-height: 280px; padding: 22px; }
  .article-body h3 { margin-top: 24px; font-size: 21px; }
  .article-layout { grid-template-columns: 1fr; gap: 28px; }
  .article-aside { position: static; display: grid; grid-template-columns: 1fr auto; gap: 4px 20px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
  .article-aside > span, .article-aside .aside-line { grid-column: 1 / -1; }
  .article-aside p, .article-aside strong { margin: 0; }
  .article-deck { margin-bottom: 34px; font-size: 17px; }
  .article-copy p { font-size: 16px; }
  .article-copy blockquote { margin: 34px 0; padding: 22px; font-size: 18px; }
  .probability-layout { gap: 44px; }
  .probability-copy h2 { font-size: 52px; }
  .myth-row strong { font-size: 15px; }
  .faq-list summary { font-size: 15px; }
  .closing-inner { align-items: flex-start; flex-direction: column; }
  .footer-main { grid-template-columns: 1fr; gap: 28px; }
  .footer-links { grid-column: auto; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}