:root {
  color-scheme: light;
  --ink: #151515;
  --muted: #676b74;
  --surface: #ffffff;
  --surface-soft: #f5f6fa;
  --surface-warm: #fff6f2;
  --line: #e1e2e8;
  --action: #ff5b35;
  --action-dark: #dc4524;
  --night: #131a27;
  --green: #173f35;
  --green-soft: #e8f1ed;
  --max: 1180px;
  --reading: 760px;
  --radius: 16px;
  --shadow: 0 18px 48px rgba(34, 38, 52, 0.12);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto;
  z-index: -1;
  height: 520px;
  background: linear-gradient(132deg, transparent 68%, rgba(223, 228, 255, 0.42) 68%);
  pointer-events: none;
}

img {
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid rgba(255, 91, 53, 0.35);
  outline-offset: 4px;
}

h1,
h2,
h3,
p,
ul,
ol,
figure {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.16;
  letter-spacing: -0.035em;
}

h1,
h2 {
  text-wrap: balance;
}

h1 {
  font-size: clamp(44px, 6vw, 68px);
}

h2 {
  font-size: clamp(32px, 4.2vw, 48px);
}

h3 {
  font-size: 22px;
}

.container {
  width: min(calc(100% - 40px), var(--max));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--night);
  color: #fff;
  transform: translateY(-160%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(225, 226, 232, 0.88);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

.header-inner {
  width: min(calc(100% - 40px), var(--max));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 950;
  letter-spacing: -0.035em;
}

.brand::before {
  content: "";
  width: 5px;
  height: 24px;
  border-radius: 999px;
  background: var(--action);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: #303139;
  font-size: 15px;
  font-weight: 650;
}

.nav-links > a,
.nav-group > a {
  white-space: nowrap;
}

.nav-links a:not(.nav-cta):hover,
.nav-links a[aria-current="page"]:not(.nav-cta) {
  color: var(--action);
}

.nav-group {
  position: relative;
  display: flex;
  align-items: center;
  gap: 2px;
  min-height: 72px;
}

.submenu-toggle {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: transform 160ms ease;
}

.nav-group.is-open .submenu-toggle,
.nav-group:focus-within .submenu-toggle {
  transform: rotate(180deg);
}

.submenu {
  position: absolute;
  top: calc(100% - 6px);
  left: -16px;
  min-width: 226px;
  display: none;
  gap: 2px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow);
}

.submenu a {
  padding: 10px 12px;
  border-radius: 9px;
  color: #333740;
}

.submenu a:hover,
.submenu a:focus-visible {
  background: var(--surface-soft);
  color: var(--action);
}

.nav-group:hover .submenu,
.nav-group:focus-within .submenu,
.nav-group.is-open .submenu {
  display: grid;
}

.nav-cta {
  padding: 10px 17px;
  border-radius: 10px;
  background: var(--action);
  color: #fff;
  box-shadow: 0 8px 20px rgba(255, 91, 53, 0.22);
  transition: transform 160ms ease, background 160ms ease;
}

.nav-cta:hover {
  background: var(--action-dark);
  transform: translateY(-1px);
}

.menu-button {
  display: none;
  min-height: 42px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}

.kicker,
.eyebrow {
  margin-bottom: 14px;
  color: var(--action);
  font-size: 20px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero,
.home-hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: 28px;
  padding-block: 60px;
}

.hero h1,
.home-hero h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(48px, 5.5vw, 66px);
  font-weight: 950;
  letter-spacing: -0.06em;
}

.accent {
  display: block;
  color: var(--action);
}

.hero-lede,
.page-lede {
  max-width: 760px;
  color: var(--muted);
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.75;
}

.tag-row,
.meta-row,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-row {
  margin: 24px 0;
}

.tag {
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: #555a63;
  font-size: 13px;
  font-weight: 650;
}

.button-row {
  margin-top: 26px;
}

.btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 19px;
  border: 0;
  border-radius: 10px;
  background: var(--action);
  color: #fff;
  font-weight: 800;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.btn:hover {
  background: var(--action-dark);
  box-shadow: 0 10px 24px rgba(255, 91, 53, 0.2);
  transform: translateY(-1px);
}

.btn.secondary {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  box-shadow: none;
}

.hero-proof {
  margin-top: 22px;
  color: var(--muted);
  font-size: 14px;
}

.portrait-card,
.hero-photo {
  position: relative;
  overflow: hidden;
  height: 560px;
  margin: 0;
  border-radius: 24px;
  background: linear-gradient(145deg, #e7e9f2, #f8f8fb);
  box-shadow: var(--shadow);
}

.portrait-card img,
.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center bottom;
}

.portrait-caption {
  position: absolute;
  right: 18px;
  bottom: 18px;
  left: 18px;
  display: grid;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(19, 26, 39, 0.9);
  color: #fff;
  backdrop-filter: blur(12px);
}

.portrait-caption span {
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
}

.section {
  padding-block: 76px;
}

.section-heading {
  max-width: 1040px;
  margin-bottom: 30px;
}

.section-heading h2 {
  max-width: 100%;
  margin-bottom: 14px;
  font-size: clamp(32px, 3.6vw, 44px);
}

.section-heading > p:last-child {
  color: var(--muted);
  font-size: 18px;
}

.answer-box {
  padding: clamp(28px, 5vw, 52px);
  border-radius: 18px;
  background: var(--night);
  color: #fff;
}

.answer-box .kicker {
  color: #ff8c70;
}

.answer-box p:last-child {
  max-width: 940px;
  margin-bottom: 0;
  color: #c7ccd6;
  font-size: clamp(19px, 2vw, 26px);
}

.grid {
  display: grid;
  gap: 16px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.aittpro-model {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 42px minmax(0, 1fr) 42px minmax(0, 1fr);
  gap: 0;
  padding: clamp(22px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(135deg, #fff 0%, #fff 62%, var(--surface-soft) 100%);
}

.model-stage {
  min-width: 0;
  padding: 24px;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 14px 38px rgba(24, 31, 45, 0.07);
}

.model-stage-heading {
  display: flex;
  align-items: center;
  gap: 14px;
}

.model-stage-heading > span {
  color: var(--action);
  font-size: 36px;
  font-weight: 950;
  line-height: 1;
}

.model-stage-heading p,
.model-stage-heading h3,
.model-feedback p {
  margin: 0;
}

.model-stage-heading p {
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
}

.model-stage-heading h3 {
  margin-top: 2px;
  font-size: clamp(22px, 2.2vw, 28px);
}

.model-stage-summary {
  min-height: 72px;
  margin: 18px 0;
  color: var(--muted);
}

.model-steps {
  display: grid;
  gap: 9px;
}

.model-step {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--surface-warm);
}

.model-step strong {
  flex: 0 0 26px;
  color: var(--action);
  font-size: 24px;
  line-height: 1;
}

.model-step span {
  min-width: 0;
  font-weight: 800;
}

.model-arrow {
  display: grid;
  place-items: center;
  color: var(--action);
  font-size: 28px;
  font-weight: 900;
}

.model-feedback {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
  padding: 14px 18px;
  border-radius: 14px;
  background: var(--night);
  color: #fff;
  text-align: center;
}

.model-feedback span {
  color: #ff8c70;
  font-size: 24px;
}

.card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.card p,
.card li {
  color: var(--muted);
}

.card p:last-child,
.card ul:last-child {
  margin-bottom: 0;
}

.card-number {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--action);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.service-grid .card-number {
  font-size: 24px;
  line-height: 1;
  letter-spacing: -0.03em;
}

.text-link {
  color: var(--action);
  font-weight: 800;
}

.text-link:hover {
  color: var(--action-dark);
}

.proof-strip,
.proof-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: var(--line);
  gap: 1px;
}

.proof-strip {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.proof-bar {
  width: min(calc(100% - 40px), var(--max));
  margin-inline: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.proof-strip > div,
.proof-bar > div {
  min-height: 132px;
  padding: 24px;
  background: #fff;
}

.proof-strip strong,
.proof-bar strong {
  display: block;
  margin-bottom: 7px;
  font-size: 22px;
}

.proof-strip span,
.proof-bar span {
  color: var(--muted);
  font-size: 14px;
}

.page-hero {
  padding: 78px 0 64px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(132deg, #fff 72%, #f1f3ff 72%);
}

.page-hero h1 {
  max-width: 1100px;
  margin-bottom: 18px;
  font-size: clamp(44px, 5.2vw, 60px);
  font-weight: 950;
}

.book-hero {
  padding-block: 54px;
}

.book-hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: clamp(40px, 7vw, 92px);
  align-items: center;
}

.book-cover-link {
  width: min(100%, 300px);
  display: block;
  justify-self: center;
  border-radius: 14px;
  transition: transform 180ms ease;
}

.book-cover-link:hover {
  transform: translateY(-4px) rotate(-0.6deg);
}

.book-cover {
  width: 100%;
  display: block;
  filter: drop-shadow(0 24px 30px rgba(34, 38, 52, 0.2));
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 0 0 28px;
  padding: 0;
  color: var(--muted);
  font-size: 13px;
  list-style: none;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 7px;
  color: #a6a9b1;
}

.prose {
  max-width: var(--reading);
  margin-inline: auto;
}

.prose h2 {
  margin-top: 56px;
  margin-bottom: 16px;
  font-size: clamp(28px, 3.2vw, 38px);
}

.prose h3 {
  margin-top: 34px;
}

.prose p,
.prose li {
  color: #3f434b;
}

.prose a {
  color: var(--action);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose .btn {
  color: #fff;
  text-decoration: none;
}

.prose .btn.secondary {
  color: var(--ink);
}

.prose blockquote,
.callout {
  margin: 30px 0;
  padding: 22px 24px;
  border-left: 4px solid var(--action);
  border-radius: 0 12px 12px 0;
  background: var(--surface-warm);
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--line);
  background: #fff;
}

.prose th,
.prose td {
  padding: 13px 15px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--surface-soft);
}

.source-list {
  padding-left: 20px;
}

.article-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.article-card {
  min-height: 250px;
  display: flex;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.article-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.article-card .meta,
.meta {
  color: var(--action);
  font-size: 20px;
  font-weight: 850;
}

.article-card p {
  color: var(--muted);
}

.article-card .text-link {
  margin-top: auto;
}

.article-cta {
  margin-top: 52px;
  padding: 28px;
  border-radius: 16px;
  background: var(--surface-warm);
}

.article-cta h2 {
  margin-top: 0;
  font-size: clamp(28px, 3.2vw, 38px);
}

.faq {
  max-width: 880px;
  margin-inline: auto;
}

.faq details {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.faq summary {
  cursor: pointer;
  font-size: 20px;
  font-weight: 800;
}

.faq details p {
  max-width: 760px;
  margin: 16px 0 0;
  color: var(--muted);
}

.cta {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 28px;
  padding: clamp(30px, 5vw, 52px);
  border-radius: 18px;
  background: var(--surface-warm);
}

.cta h2 {
  margin-bottom: 8px;
}

.cta p {
  margin-bottom: 0;
  color: var(--muted);
}

.site-footer {
  margin-top: 70px;
  padding: 64px 0 24px;
  background: #294896;
  color: #fff;
}

.contact-footer-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: clamp(48px, 9vw, 120px);
  align-items: center;
}

.contact-footer-content h2 {
  margin: 0 0 18px;
  color: #fff;
  font-size: clamp(34px, 4vw, 48px);
  line-height: 1.12;
}

.contact-footer-content > p {
  max-width: 760px;
  margin: 0 0 8px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 17px;
}

.contact-footer-list {
  display: grid;
  gap: 10px;
  margin-top: 26px;
  color: #fff;
  font-style: normal;
}

.contact-footer-list span,
.contact-footer-list a {
  width: fit-content;
}

.contact-footer-list a:hover,
.contact-footer-legal a:hover {
  color: #ffd5ca;
}

.contact-footer-qr {
  display: grid;
  justify-items: center;
  justify-self: end;
  gap: 8px;
  text-align: center;
}

.contact-footer-qr img {
  width: 180px;
  aspect-ratio: 1;
  padding: 12px;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 18px 42px rgba(9, 28, 78, 0.24);
  object-fit: cover;
  object-position: center 65%;
}

.contact-footer-qr strong {
  color: #fff;
  font-size: 15px;
}

.contact-footer-qr span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.contact-footer-legal {
  display: grid;
  justify-items: center;
  gap: 4px;
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  text-align: center;
}

.contact-footer-legal p {
  margin: 0;
}

/* 新首页组件 */
.home-hero {
  width: min(calc(100% - 40px), var(--max));
  min-height: 640px;
  margin-inline: auto;
  padding-bottom: 40px;
}

.pain-grid,
.service-grid,
.diagnosis-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.pain-grid article,
.service-grid article,
.diagnosis-grid article {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.pain-grid p,
.service-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.diagnosis-section {
  padding-block: 78px;
  background: var(--night);
  color: #fff;
}

.diagnosis-section .eyebrow {
  color: #ff8c70;
}

.diagnosis-section > .container > p:not(.eyebrow),
.diagnosis-section .diagnosis-grid p {
  color: #b9bfca;
}

.diagnosis-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: 42px;
  align-items: stretch;
}

.diagnosis-layout > div > h2 {
  font-size: 42px;
  white-space: nowrap;
}

.diagnosis-lede {
  max-width: 760px;
  color: #b9bfca;
  font-size: 18px;
}

.diagnosis-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 30px 0;
}

.diagnosis-grid article {
  border-color: #30394a;
  background: #202a3b;
}

.diagnosis-grid h3 {
  font-size: 18px;
}

.diagnosis-delivery {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding-top: 20px;
  border-top: 1px solid #30394a;
}

.diagnosis-delivery strong {
  color: #ff8c70;
  font-size: 20px;
}

.qr-card {
  width: 100%;
  max-width: 210px;
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
  align-self: center;
  gap: 14px;
  padding: 22px;
  border-radius: 16px;
  background: #fff;
  color: var(--ink);
  text-align: center;
}

.qr-card > div {
  min-width: 0;
  text-align: center;
}

.qr-card h3 {
  margin-bottom: 10px;
  font-size: 18px;
}

.qr-card .btn {
  width: 100%;
  white-space: nowrap;
}

.qr-card img {
  width: 132px;
  aspect-ratio: 1;
  border-radius: 10px;
  object-fit: cover;
  object-position: center 65%;
}

.contact-section > img {
  width: 220px;
  aspect-ratio: 1;
  border-radius: 10px;
  object-fit: cover;
  object-position: center 65%;
}

.proof-section {
  padding-block: 76px;
  background: var(--surface-soft);
}

.scene-section {
  padding-block: 76px;
  background: #fff;
}

.scene-section--soft {
  background: var(--surface-soft);
}

.scene-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.scene-card {
  min-width: 0;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 18px 42px rgba(20, 28, 43, 0.08);
}

.scene-card--wide {
  grid-column: span 2;
}

.scene-card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #e9edf3;
}

.scene-card--wide .scene-card__media {
  aspect-ratio: 16 / 9;
}

.scene-card__media img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
}

.scene-card--contain .scene-card__media img {
  object-fit: contain;
}

.scene-card__caption {
  margin: 0;
  padding: 16px 18px 18px;
  color: var(--muted);
  line-height: 1.7;
}

.proof-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.proof-cards article {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.proof-cards article > p:not(.meta) {
  color: var(--muted);
}

.client-proof-section {
  padding-top: 0;
}

.client-groups,
.client-quotes {
  display: grid;
  gap: 16px;
}

.client-groups {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.client-group,
.client-quote {
  margin: 0;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.client-group h3 {
  margin-bottom: 12px;
}

.client-group p {
  margin: 0;
  color: var(--muted);
  line-height: 1.9;
}

.client-quote-heading {
  margin-top: 64px;
}

.client-quotes {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.client-quote {
  color: var(--ink);
}

.client-quote p {
  margin: 0 0 20px;
  line-height: 1.85;
}

.client-quote footer {
  color: var(--accent);
  font-weight: 800;
}

.enterprise-banner {
  width: min(calc(100% - 40px), var(--max));
  margin: 76px auto;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 30px;
  padding: clamp(30px, 5vw, 52px);
  border-radius: 18px;
  background: var(--green);
  color: #fff;
}

.enterprise-banner .eyebrow {
  color: #9fd3c4;
}

.enterprise-banner h2 {
  margin-bottom: 0;
}

.contact-section {
  width: min(calc(100% - 40px), 900px);
  margin: 0 auto;
  padding: 76px 0;
  text-align: center;
}

.contact-section > img {
  display: block;
  margin: 24px auto 16px;
}

.contact-note {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

/* 新内页组件 */
.section-soft {
  background: var(--surface-soft);
}

.section-dark {
  background: var(--night);
  color: #fff;
}

.section-dark .eyebrow {
  color: #ff8c70;
}

.split-feature {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(34px, 6vw, 80px);
  align-items: start;
}

.split-feature .prose {
  width: 100%;
  margin: 0;
}

.process-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.process-list li {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.process-list li > span {
  color: var(--action);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.process-list h3,
.process-list p {
  margin-bottom: 5px;
}

.process-list p {
  color: var(--muted);
}

.process-list.light {
  border-color: #30394a;
}

.process-list.light li {
  border-color: #30394a;
}

.process-list.light p {
  color: #b9bfca;
}

.deliverable-grid,
.boundary-grid,
.diagnosis-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.deliverable-grid span {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  font-weight: 750;
}

.boundary-grid article,
.diagnosis-steps article {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.boundary-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.diagnosis-hero {
  background: linear-gradient(132deg, var(--night) 72%, #202a3b 72%);
  color: #fff;
}

.diagnosis-hero .breadcrumbs,
.diagnosis-hero .page-lede {
  color: #b9bfca;
}

.diagnosis-steps {
  margin-top: 30px;
}

.diagnosis-steps article {
  border: 1px solid #30394a;
  background: #202a3b;
}

.diagnosis-steps span {
  display: block;
  margin-bottom: 24px;
  color: #ff8c70;
  font-size: 20px;
  font-weight: 900;
}

.diagnosis-steps p {
  margin-bottom: 0;
  color: #b9bfca;
}

.diagnosis-contact {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: center;
  padding: clamp(28px, 5vw, 52px);
  border-radius: 18px;
  background: var(--surface-warm);
}

.diagnosis-contact img {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 14px;
  object-fit: cover;
  object-position: center 65%;
}

.enterprise-hero {
  background: linear-gradient(132deg, #fff 70%, var(--green-soft) 70%);
}

.section-link {
  margin: 24px 0 0;
}

.about-intro {
  display: grid;
  grid-template-columns: minmax(300px, 0.75fr) minmax(0, 1.25fr);
  gap: clamp(34px, 6vw, 78px);
  align-items: center;
}

.about-photo {
  overflow: hidden;
  height: 600px;
  margin: 0;
  border-radius: 22px;
  background: linear-gradient(145deg, #e7e9f2, #f8f8fb);
}

.about-photo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center bottom;
}

.about-intro blockquote {
  margin: 28px 0 0;
  padding: 18px 22px;
  border-left: 4px solid var(--action);
  background: var(--surface-warm);
  color: #3f434b;
}

.faq-group > h2 {
  max-width: 800px;
  margin-bottom: 28px;
}

@media (max-width: 1100px) {
  .scene-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .diagnosis-layout {
    grid-template-columns: 1fr;
  }

  .qr-card {
    max-width: 210px;
    justify-self: start;
  }
}

@media (max-width: 980px) {
  .nav-links {
    position: absolute;
    top: 72px;
    right: 20px;
    left: 20px;
    display: none;
    max-height: calc(100vh - 96px);
    overflow-y: auto;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fff;
    box-shadow: var(--shadow);
  }

  .nav-links.is-open {
    display: grid;
    gap: 6px;
  }

  .menu-button {
    display: inline-flex;
    align-items: center;
  }

  .nav-group {
    min-height: auto;
    display: grid;
    grid-template-columns: 1fr 40px;
  }

  .nav-group > a,
  .nav-links > a {
    padding: 10px 11px;
  }

  .submenu-toggle {
    width: 40px;
    height: 40px;
  }

  .submenu {
    position: static;
    grid-column: 1 / -1;
    min-width: 0;
    margin-top: 2px;
    border: 0;
    border-radius: 10px;
    background: var(--surface-soft);
    box-shadow: none;
  }

  .nav-group:hover .submenu,
  .nav-group:focus-within .submenu {
    display: none;
  }

  .nav-group.is-open .submenu {
    display: grid;
  }

  .nav-cta {
    margin-top: 4px;
    text-align: center;
  }

  .hero,
  .home-hero {
    grid-template-columns: 1fr 0.82fr;
  }

  .diagnosis-layout {
    grid-template-columns: 1fr;
  }

  .split-feature {
    grid-template-columns: 1fr;
  }

  .about-intro {
    grid-template-columns: 1fr;
  }

  .grid.three,
  .pain-grid,
  .service-grid,
  .diagnosis-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .aittpro-model {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .model-arrow {
    min-height: 24px;
    transform: rotate(90deg);
  }

  .model-feedback {
    grid-column: auto;
    margin-top: 4px;
  }

  .model-stage-summary {
    min-height: 0;
  }
}

@media (max-width: 720px) {
  .container,
  .header-inner,
  .home-hero,
  .enterprise-banner,
  .contact-section {
    width: min(calc(100% - 24px), var(--max));
  }

  .header-inner {
    min-height: 64px;
  }

  .nav-links {
    top: 64px;
    right: 12px;
    left: 12px;
  }

  .brand {
    font-size: 18px;
  }

  .brand::before {
    width: 4px;
    height: 20px;
  }

  .hero,
  .home-hero {
    min-height: 0;
    grid-template-columns: 1fr;
    gap: 30px;
    padding-block: 42px;
  }

  .hero h1,
  .home-hero h1,
  .page-hero h1 {
    font-size: clamp(38px, 12vw, 52px);
  }

  .portrait-card,
  .hero-photo {
    height: 500px;
  }

  .proof-bar,
  .proof-strip,
  .grid.two,
  .grid.three,
  .pain-grid,
  .service-grid,
  .diagnosis-grid,
  .article-list,
  .proof-cards,
  .client-groups,
  .client-quotes,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .deliverable-grid,
  .boundary-grid,
  .diagnosis-steps,
  .diagnosis-contact {
    grid-template-columns: 1fr;
  }

  .diagnosis-contact img {
    width: min(100%, 260px);
    justify-self: center;
  }

  .about-photo {
    height: 520px;
  }

  .proof-bar {
    width: min(calc(100% - 24px), var(--max));
    border: 1px solid var(--line);
  }

  .proof-bar > div,
  .proof-strip > div {
    min-height: auto;
  }

  .section,
  .diagnosis-section,
  .proof-section,
  .scene-section {
    padding-block: 56px;
  }

  .scene-gallery {
    grid-template-columns: 1fr;
  }

  .scene-card--wide {
    grid-column: auto;
  }

  .scene-card__media,
  .scene-card--wide .scene-card__media {
    aspect-ratio: 4 / 3;
  }

  .page-hero {
    padding: 50px 0 44px;
    background: linear-gradient(145deg, #fff 76%, #f1f3ff 76%);
  }

  .page-hero.diagnosis-hero {
    background: linear-gradient(145deg, var(--night) 82%, #202a3b 82%);
  }

  .book-hero-layout {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .book-cover {
    width: 100%;
  }

  .book-cover-link {
    width: min(100%, 280px);
  }

  .qr-card {
    max-width: 100%;
    justify-self: stretch;
  }

  .diagnosis-layout > div > h2 {
    white-space: normal;
  }

  .qr-card > div {
    width: 100%;
  }

  .qr-card img {
    margin-inline: auto;
  }

  .enterprise-banner,
  .cta {
    grid-template-columns: 1fr;
  }

  .footer-links {
    grid-template-columns: 1fr;
  }

  .site-footer {
    padding-top: 52px;
  }

  .contact-footer-layout {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .contact-footer-content h2 {
    font-size: 36px;
  }

  .contact-footer-content > p {
    font-size: 16px;
  }

  .contact-footer-qr {
    justify-self: start;
    justify-items: start;
    text-align: left;
  }

  .contact-footer-qr img {
    width: min(180px, 58vw);
  }

  .contact-footer-legal {
    justify-items: start;
    margin-top: 38px;
    text-align: left;
  }

  .prose table {
    display: block;
    overflow-x: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}