:root {
  color-scheme: light;
  --bg: #f2f3ef;
  --surface: #f9faf7;
  --surface-strong: #ffffff;
  --surface-muted: #e7eae4;
  --ink: #15211e;
  --ink-soft: #53615d;
  --ink-faint: #78847f;
  --line: rgba(21, 33, 30, 0.13);
  --line-strong: rgba(21, 33, 30, 0.22);
  --accent: #285f56;
  --accent-deep: #0f443b;
  --accent-soft: #dceae5;
  --accent-pale: #edf4f0;
  --warning-soft: #f3e7d7;
  --shadow: 0 24px 70px rgba(23, 48, 41, 0.13);
  --radius-card: 18px;
  --radius-control: 10px;
  --header-height: 72px;
  font-family: "SF Pro Display", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  scroll-behavior: smooth;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #111714;
  --surface: #171f1c;
  --surface-strong: #1d2824;
  --surface-muted: #24302c;
  --ink: #edf2ef;
  --ink-soft: #b4c0bb;
  --ink-faint: #87948f;
  --line: rgba(237, 242, 239, 0.12);
  --line-strong: rgba(237, 242, 239, 0.2);
  --accent: #79ad9f;
  --accent-deep: #bfe0d6;
  --accent-soft: #213c35;
  --accent-pale: #192d28;
  --warning-soft: #3a3025;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }

html { scroll-padding-top: calc(var(--header-height) + 18px); }

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 82% 10%, color-mix(in srgb, var(--accent-soft) 58%, transparent), transparent 28rem),
    var(--bg);
  color: var(--ink);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.18;
  background-image: linear-gradient(rgba(40, 95, 86, 0.12) 1px, transparent 1px), linear-gradient(90deg, rgba(40, 95, 86, 0.12) 1px, transparent 1px);
  background-size: 84px 84px;
  mask-image: linear-gradient(to bottom, black, transparent 52%);
}

img { display: block; max-width: 100%; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }

.skip-link {
  position: fixed;
  left: 16px;
  top: 10px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: var(--radius-control);
  color: var(--surface-strong);
  background: var(--ink);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  min-height: var(--header-height);
  display: grid;
  grid-template-columns: minmax(180px, auto) minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  padding: 12px clamp(18px, 4vw, 64px);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 91%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 11px;
  color: #f2f7f5;
  background: #0f443b;
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: -0.04em;
}

.brand-copy strong, .brand-copy small { display: block; white-space: nowrap; }
.brand-copy strong { font-size: 0.98rem; letter-spacing: -0.03em; }
.brand-copy small { margin-top: 2px; color: var(--ink-faint); font-size: 0.67rem; }

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 2.2vw, 32px);
}

.site-nav a {
  position: relative;
  padding: 8px 0;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 650;
  white-space: nowrap;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 1px;
  height: 2px;
  background: var(--accent);
  transition: right 180ms ease;
}

.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }

.header-actions { display: flex; align-items: center; gap: 8px; }

.theme-toggle, .menu-toggle {
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  color: var(--ink-soft);
  background: var(--surface);
  cursor: pointer;
}

.menu-toggle { display: none; }

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 19px;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 760;
  white-space: nowrap;
  transition: transform 150ms ease, background 150ms ease, border-color 150ms ease;
}

.button:hover { transform: translateY(-2px); }
.button:active { transform: translateY(1px) scale(0.99); }
.button-small { min-height: 40px; padding-inline: 15px; font-size: 0.8rem; }
.button-primary { color: #f3f8f6; background: #0f443b; }
.button-primary:hover { background: #285f56; }
.button-secondary { color: var(--ink); border-color: var(--line-strong); background: var(--surface); }
.button-secondary:hover { border-color: var(--accent); background: var(--accent-pale); }

.button:focus-visible, .theme-toggle:focus-visible, .menu-toggle:focus-visible, .site-nav a:focus-visible,
.walkthrough-tabs button:focus-visible, .module-groups a:focus-visible, .domain a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 60%, transparent);
  outline-offset: 3px;
}

.section {
  width: min(1260px, calc(100% - 40px));
  margin-inline: auto;
  padding-block: clamp(76px, 9vw, 132px);
}

.hero {
  width: min(1440px, calc(100% - 40px));
  min-height: calc(100dvh - var(--header-height));
  display: grid;
  grid-template-columns: minmax(360px, 0.78fr) minmax(0, 1.22fr);
  align-items: center;
  gap: clamp(42px, 5vw, 78px);
  padding-top: clamp(52px, 6vw, 88px);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.16em;
}

.hero h1 {
  max-width: 11.8em;
  margin: 0;
  font-size: clamp(2.65rem, 3.7vw, 3.75rem);
  line-height: 1.04;
  letter-spacing: -0.06em;
  text-wrap: pretty;
  line-break: strict;
  overflow-wrap: break-word;
}

.title-phrase {
  display: inline-block;
  white-space: nowrap;
}

.hero-lede {
  max-width: 24em;
  margin: 28px 0 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  line-height: 1.72;
}

.button-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }

.hero-visual { min-width: 0; }

.browser-frame {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-card);
  background: #f4f4f0;
  box-shadow: var(--shadow);
  transform: perspective(1200px) rotateY(-2deg) rotateX(1deg);
  transform-origin: center;
}

.browser-bar {
  height: 38px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 13px;
  border-bottom: 1px solid rgba(21, 33, 30, 0.12);
  color: #68736f;
  background: #e7e9e5;
}

.browser-bar span { width: 8px; height: 8px; border-radius: 50%; background: #aeb6b2; }
.browser-bar b { margin-left: 7px; color: #4f5b57; font-size: 0.64rem; font-weight: 650; }
.browser-frame img { width: 100%; height: auto; }

.visual-caption {
  margin: 14px 0 0;
  color: var(--ink-faint);
  font-size: 0.76rem;
  line-height: 1.55;
}

.fact-band {
  width: min(1260px, calc(100% - 40px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.fact-band div { min-height: 102px; padding: 22px clamp(14px, 2.2vw, 30px); }
.fact-band div + div { border-left: 1px solid var(--line); }
.fact-band strong, .fact-band span { display: block; }
.fact-band strong { font-size: 1rem; letter-spacing: -0.025em; }
.fact-band span { margin-top: 8px; color: var(--ink-faint); font-size: 0.76rem; line-height: 1.45; }

.section-heading { max-width: 1080px; }
.section-heading h2, .loop-intro h2, .boundary-copy h2, .final-cta h2 {
  margin: 0;
  font-size: clamp(2.05rem, 3.05vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.045em;
  text-wrap: pretty;
  line-break: strict;
  overflow-wrap: break-word;
}

.section-heading > p:not(.eyebrow), .loop-intro p, .boundary-copy p, .final-cta-copy p {
  max-width: 620px;
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.75;
}

.problem-grid {
  margin-top: 54px;
  display: grid;
  grid-template-columns: minmax(300px, 0.8fr) minmax(0, 1.2fr);
  gap: 18px;
}

.problem-statement {
  min-height: 480px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(28px, 4vw, 54px);
  border-radius: var(--radius-card);
  color: #f1f6f4;
  background:
    radial-gradient(circle at 80% 10%, rgba(121, 173, 159, 0.35), transparent 38%),
    #0f443b;
}

.problem-statement > p { margin: 0 0 auto; color: #bdd7cf; font-size: 0.78rem; font-weight: 730; }
.problem-statement h3 { max-width: 16em; margin: 0; font-size: clamp(1.75rem, 2.25vw, 2.25rem); line-height: 1.14; letter-spacing: -0.035em; text-wrap: pretty; line-break: strict; }
.problem-statement span { max-width: 34em; margin-top: 22px; color: #c9d9d4; line-height: 1.65; }

.response-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.response-list article { min-height: 230px; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--surface); }
.response-list article:nth-child(2), .response-list article:nth-child(3) { background: var(--accent-pale); }
.response-list b { font-size: 1.1rem; letter-spacing: -0.02em; }
.response-list p { margin: 42px 0 0; color: var(--ink-soft); line-height: 1.68; }

.loop-section { padding-top: 82px; }
.loop-intro { max-width: 1080px; }
.loop-track {
  margin: 58px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(8, minmax(120px, 1fr));
  overflow-x: auto;
  list-style: none;
  scrollbar-width: thin;
  scroll-snap-type: x proximity;
}

.loop-track li {
  position: relative;
  min-height: 180px;
  padding: 24px 18px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  scroll-snap-align: start;
}

.loop-track li + li { border-left: 1px solid var(--line); }
.loop-track li::after { content: ""; position: absolute; right: -5px; top: 36px; z-index: 1; width: 9px; height: 9px; border-top: 2px solid var(--accent); border-right: 2px solid var(--accent); transform: rotate(45deg); }
.loop-track li:last-child::after { display: none; }
.loop-track span, .loop-track strong { display: block; }
.loop-track span { color: var(--accent); font-size: 0.72rem; font-weight: 780; }
.loop-track strong { margin-top: 66px; font-size: 0.94rem; line-height: 1.45; }
.loop-proof { max-width: 710px; margin: 24px 0 0; color: var(--ink-faint); line-height: 1.6; }

.architecture-grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: 1.22fr 0.78fr;
  grid-template-rows: repeat(2, minmax(280px, auto));
  gap: 18px;
}

.domain { min-height: 280px; display: flex; flex-direction: column; padding: clamp(28px, 3.5vw, 46px); border-radius: var(--radius-card); overflow: hidden; }
.domain > span { color: var(--accent); font-size: 0.76rem; font-weight: 780; }
.domain h3 { max-width: 16em; margin: 24px 0 0; font-size: clamp(1.5rem, 2vw, 2.1rem); line-height: 1.16; letter-spacing: -0.03em; text-wrap: pretty; line-break: strict; }
.domain p { max-width: 36em; margin: 18px 0 0; color: var(--ink-soft); line-height: 1.66; }
.domain a { width: fit-content; margin-top: auto; padding-top: 26px; color: var(--accent-deep); font-weight: 760; text-underline-offset: 5px; }
.domain-work { grid-row: span 2; min-height: 578px; color: #eff6f3; background: radial-gradient(circle at 78% 18%, rgba(121, 173, 159, 0.32), transparent 34%), #0f443b; }
.domain-work > span, .domain-work a { color: #bfe0d6; }
.domain-work p { color: #c7d8d2; }
.domain-analysis { background: var(--accent-soft); }
.domain-knowledge { background: var(--surface-strong); border: 1px solid var(--line); }
.domain-system { background: var(--surface-muted); }

.walkthrough-section { width: min(1380px, calc(100% - 40px)); }
.walkthrough-layout { margin-top: 54px; display: grid; grid-template-columns: minmax(250px, 0.27fr) minmax(0, 0.73fr); gap: 18px; }
.walkthrough-tabs { display: flex; flex-direction: column; gap: 8px; }
.walkthrough-tabs button { min-height: 116px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius-card); color: var(--ink); background: var(--surface); text-align: left; cursor: pointer; transition: transform 150ms ease, background 150ms ease, border-color 150ms ease; }
.walkthrough-tabs button:hover { transform: translateX(3px); border-color: var(--accent); }
.walkthrough-tabs button[aria-selected="true"] { color: var(--accent-deep); border-color: var(--accent); background: var(--accent-soft); }
.walkthrough-tabs strong, .walkthrough-tabs span { display: block; }
.walkthrough-tabs strong { font-size: 1rem; }
.walkthrough-tabs span { margin-top: 10px; color: var(--ink-soft); font-size: 0.76rem; line-height: 1.5; }
.preview-stage { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--surface); }
.preview-copy { min-height: 118px; display: grid; grid-template-columns: minmax(150px, 0.36fr) minmax(0, 1fr) auto; align-items: center; gap: 24px; padding: 25px 30px; border-bottom: 1px solid var(--line); }
.preview-copy h3, .preview-copy p { margin: 0; }
.preview-copy h3 { font-size: 1.3rem; letter-spacing: -0.03em; }
.preview-copy p { color: var(--ink-soft); line-height: 1.55; }
.preview-copy a { color: var(--accent-deep); font-weight: 760; text-underline-offset: 5px; white-space: nowrap; }
.preview-image-wrap { position: relative; min-height: 420px; background: #e9ece8; }
.preview-image-wrap img { width: 100%; height: auto; transition: opacity 180ms ease; }
.preview-skeleton { position: absolute; inset: 0; display: none; background: linear-gradient(105deg, #e5e8e4 30%, #f2f4f1 45%, #e5e8e4 60%); background-size: 200% 100%; }
.preview-error { display: none; position: absolute; inset: 0; place-items: center; padding: 24px; color: var(--ink-soft); text-align: center; }
.preview-image-wrap[data-preview-state="loading"] .preview-skeleton { display: block; animation: skeleton 1.2s ease-in-out infinite; }
.preview-image-wrap[data-preview-state="loading"] img { opacity: 0; }
.preview-image-wrap[data-preview-state="error"] img, .preview-image-wrap[data-preview-state="error"] .preview-skeleton { display: none; }
.preview-image-wrap[data-preview-state="error"] .preview-error { display: grid; }

@keyframes skeleton { from { background-position: 100% 0; } to { background-position: -100% 0; } }

.module-index-section { padding-top: 72px; }
.module-groups { margin-top: 50px; display: grid; grid-template-columns: 0.9fr 1.4fr 0.8fr 0.9fr; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.module-groups article { padding: 28px clamp(18px, 2.5vw, 34px) 34px; }
.module-groups article + article { border-left: 1px solid var(--line); }
.module-groups h3 { margin: 0 0 22px; font-size: 0.86rem; color: var(--accent); }
.module-groups div { display: grid; gap: 7px; }
.module-groups a { padding: 5px 0; color: var(--ink-soft); text-decoration: none; font-size: 0.86rem; }
.module-groups a:hover { color: var(--accent-deep); text-decoration: underline; text-underline-offset: 4px; }

.boundary-section { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(44px, 7vw, 100px); align-items: start; }
.boundary-copy { position: sticky; top: calc(var(--header-height) + 40px); }
.approval-flow { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.approval-flow article { min-height: 200px; padding: 28px; border-radius: var(--radius-card); background: var(--surface); border: 1px solid var(--line); }
.approval-flow article:nth-child(2), .approval-flow article:nth-child(3) { background: var(--accent-pale); }
.approval-flow span, .approval-flow strong { display: block; }
.approval-flow span { color: var(--accent); font-size: 0.72rem; font-weight: 780; }
.approval-flow strong { margin-top: 64px; font-size: 1.05rem; line-height: 1.5; }
.boundary-rules { grid-column: 2; display: grid; gap: 1px; margin-top: -56px; padding-top: 0; background: var(--line); border-radius: var(--radius-card); overflow: hidden; }
.boundary-rules p { margin: 0; padding: 20px 24px; background: var(--surface-strong); }
.boundary-rules strong, .boundary-rules span { display: block; }
.boundary-rules strong { font-size: 0.88rem; }
.boundary-rules span { margin-top: 6px; color: var(--ink-soft); font-size: 0.78rem; line-height: 1.5; }

.delivery-compare { margin-top: 54px; display: grid; grid-template-columns: 0.84fr 1.16fr; gap: 18px; }
.delivery-compare article { min-height: 440px; padding: clamp(30px, 4vw, 50px); border-radius: var(--radius-card); }
.delivery-compare > article > span { color: var(--accent); font-size: 0.76rem; font-weight: 780; }
.delivery-compare h3 { max-width: 17em; margin: 22px 0 0; font-size: clamp(1.55rem, 2.05vw, 2.1rem); line-height: 1.16; letter-spacing: -0.03em; text-wrap: pretty; line-break: strict; }
.delivery-compare ul { margin: 42px 0 0; padding: 0; list-style: none; }
.delivery-compare li { position: relative; padding-left: 20px; color: var(--ink-soft); line-height: 1.6; }
.delivery-compare li + li { margin-top: 15px; }
.delivery-compare li::before { content: ""; position: absolute; left: 0; top: 0.66em; width: 8px; height: 2px; background: var(--accent); }
.delivery-current { background: var(--warning-soft); }
.delivery-target { border: 1px solid var(--line); background: var(--surface-strong); }

.final-cta { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 42px; border-top: 1px solid var(--line-strong); }
.final-cta h2 { max-width: 12em; }
.final-cta .button-row { margin: 0; justify-content: flex-end; }

.site-footer { min-height: 180px; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 40px; padding: 42px clamp(20px, 5vw, 72px); border-top: 1px solid var(--line); background: var(--surface); }
.site-footer p { max-width: 620px; margin: 0 auto; color: var(--ink-soft); font-size: 0.78rem; line-height: 1.6; }
.site-footer .brand-copy small { color: var(--ink-soft); }
.site-footer > a { color: var(--accent-deep); font-size: 0.82rem; font-weight: 760; text-underline-offset: 5px; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 620ms cubic-bezier(0.16, 1, 0.3, 1), transform 620ms cubic-bezier(0.16, 1, 0.3, 1); }
.reveal[data-delay="1"] { transition-delay: 100ms; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1080px) {
  .site-header { grid-template-columns: auto minmax(0, 1fr) auto; gap: 14px; }
  .site-nav { gap: 15px; }
  .site-nav a { font-size: 0.76rem; }
  .hero { grid-template-columns: 0.72fr 1.28fr; gap: 34px; }
  .hero h1 { font-size: clamp(2.6rem, 4.5vw, 3.9rem); }
  .module-groups { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .module-groups article:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); }
  .module-groups article:nth-child(4) { border-top: 1px solid var(--line); }
}

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto auto; }
  .menu-toggle { display: inline-flex; align-items: center; }
  .site-nav { position: absolute; left: 18px; right: 18px; top: calc(100% + 8px); display: none; padding: 12px; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--surface-strong); box-shadow: var(--shadow); }
  .site-nav.open { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-nav a { padding: 12px; border-radius: var(--radius-control); }
  .site-nav a:hover { background: var(--accent-soft); }
  .site-nav a::after { display: none; }
  .theme-toggle { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-block: 72px 82px; }
  .hero h1 { max-width: 12em; font-size: clamp(2.65rem, 7.2vw, 3.8rem); }
  .browser-frame { transform: none; }
  .problem-grid, .walkthrough-layout, .boundary-section, .delivery-compare { grid-template-columns: 1fr; }
  .problem-statement { min-height: 400px; }
  .architecture-grid { grid-template-columns: 1fr; grid-template-rows: auto; }
  .domain-work { grid-row: auto; min-height: 420px; }
  .walkthrough-tabs { flex-direction: row; overflow-x: auto; padding-bottom: 6px; scroll-snap-type: x mandatory; }
  .walkthrough-tabs button { min-width: 250px; scroll-snap-align: start; }
  .boundary-copy { position: static; }
  .boundary-rules { grid-column: 1; margin-top: 0; }
  .final-cta { grid-template-columns: 1fr; align-items: start; }
  .final-cta .button-row { justify-content: flex-start; }
  .site-footer { grid-template-columns: 1fr; gap: 24px; }
  .site-footer p { margin: 0; }
}

@media (max-width: 680px) {
  :root { --header-height: 64px; }
  .site-header { padding: 10px 16px; }
  .brand-copy small { display: none; }
  .header-actions .button { display: none; }
  .section, .hero, .fact-band, .walkthrough-section { width: min(100% - 28px, 1260px); }
  .hero { padding-top: 56px; gap: 42px; }
  .hero h1 { font-size: clamp(2.35rem, 9.5vw, 3.2rem); }
  .hero-lede { font-size: 1rem; }
  .button-row { display: grid; grid-template-columns: 1fr; }
  .button { width: 100%; }
  .fact-band { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fact-band div:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); }
  .fact-band div:nth-child(4) { border-top: 1px solid var(--line); }
  .section-heading h2, .loop-intro h2, .boundary-copy h2, .final-cta h2 { font-size: clamp(1.85rem, 7.8vw, 2.35rem); }
  .problem-grid { margin-top: 36px; }
  .response-list, .approval-flow { grid-template-columns: 1fr; }
  .response-list article { min-height: 180px; }
  .response-list p { margin-top: 30px; }
  .loop-track { margin-inline: -14px; padding-inline: 14px; }
  .domain { min-height: 300px; }
  .domain-work { min-height: 400px; }
  .preview-copy { grid-template-columns: 1fr; gap: 10px; }
  .preview-image-wrap { min-height: 220px; overflow-x: auto; }
  .preview-image-wrap img { width: 900px; max-width: none; }
  .module-groups { grid-template-columns: 1fr; }
  .module-groups article + article { border-left: 0; border-top: 1px solid var(--line); }
  .delivery-compare article { min-height: auto; }
  .footer-brand .brand-copy small { display: block; }
  .title-phrase { display: inline; white-space: normal; }
}

@supports (word-break: auto-phrase) {
  .hero h1,
  .section-heading h2,
  .loop-intro h2,
  .boundary-copy h2,
  .final-cta h2,
  .problem-statement h3,
  .domain h3,
  .delivery-compare h3 {
    word-break: auto-phrase;
    overflow-wrap: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
  .browser-frame { transform: none; }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header { background: var(--bg); backdrop-filter: none; -webkit-backdrop-filter: none; }
}

@media print {
  .site-header, .button-row, .theme-toggle, .menu-toggle { display: none !important; }
  .section { padding-block: 44px; }
  .reveal { opacity: 1; transform: none; }
  body { background: #ffffff; color: #111713; }
}