:root {
  --ink: #15130f;
  --muted: #6e665c;
  --line: #e8dfd2;
  --paper: #fbf8f1;
  --warm: #c69a5b;
  --warm-2: #8a6537;
  --deep: #272019;
  --green: #48554d;
  --white: #ffffff;
  --shadow: 0 22px 60px rgba(39, 32, 25, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

body.modal-open {
  overflow: hidden;
}

img {
  max-width: 100%;
  display: block;
}

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 28px;
  padding: 18px clamp(20px, 5vw, 72px);
  color: var(--white);
  transition: background 0.25s ease, box-shadow 0.25s ease, color 0.25s ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  color: var(--ink);
  background: rgba(251, 248, 241, 0.94);
  box-shadow: 0 12px 40px rgba(39, 32, 25, 0.09);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 190px;
}

.brand-mark {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 34px;
  min-width: 34px;
  height: 38px;
  padding-bottom: 5px;
  color: var(--warm);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 34px;
  font-weight: 800;
  line-height: 1;
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 6px;
  right: 6px;
  bottom: 0;
  height: 2px;
  background: currentColor;
}

.brand strong {
  display: block;
  font-size: 22px;
  line-height: 1;
  letter-spacing: 0;
}

.brand small {
  display: block;
  margin-top: 3px;
  font-size: 10px;
  line-height: 1;
  text-transform: uppercase;
  color: currentColor;
  opacity: 0.72;
}

.nav {
  display: flex;
  justify-content: flex-end;
  gap: clamp(16px, 2.4vw, 34px);
  font-size: 14px;
  color: currentColor;
}

.nav a {
  opacity: 0.86;
}

.nav a:hover {
  opacity: 1;
}

.header-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 4px;
  font-weight: 700;
  white-space: nowrap;
}

.header-cta {
  border: 1px solid currentColor;
  font-size: 14px;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid currentColor;
  border-radius: 4px;
  color: currentColor;
  background: transparent;
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header.is-open .menu-button span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.site-header.is-open .menu-button span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  padding: 152px clamp(20px, 5vw, 72px) 44px;
  color: var(--white);
  background: var(--deep);
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  filter: saturate(0.96) contrast(1.02);
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(15, 13, 10, 0.88), rgba(15, 13, 10, 0.54) 42%, rgba(15, 13, 10, 0.16)),
    linear-gradient(180deg, rgba(15, 13, 10, 0.42), transparent 38%, rgba(15, 13, 10, 0.68));
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(740px, 100%);
  padding-bottom: clamp(24px, 7vh, 96px);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--warm);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 24px;
  font-size: clamp(52px, 8vw, 116px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(30px, 4.2vw, 58px);
  line-height: 1.15;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.3;
}

.hero-copy {
  max-width: 660px;
  margin-bottom: 32px;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(17px, 1.7vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button.primary {
  color: #211912;
  background: var(--warm);
}

.button.secondary {
  border: 1px solid rgba(255, 255, 255, 0.48);
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.button.secondary.dark {
  border-color: rgba(21, 19, 15, 0.22);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
}

.hero-stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: min(980px, 100%);
  border-top: 1px solid rgba(255, 255, 255, 0.24);
}

.hero-stats div {
  padding: 22px 26px 0 0;
}

.hero-stats strong {
  display: block;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
  color: #f0c27b;
}

.hero-stats .text-stat strong {
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.15;
}

.hero-stats span {
  display: block;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 14px;
}

.section {
  padding: clamp(76px, 10vw, 132px) clamp(20px, 5vw, 72px);
}

.section-heading {
  max-width: 860px;
  margin-bottom: 42px;
}

.section-heading h2 {
  max-width: 760px;
}

.pain {
  background: var(--paper) url("./assets/pdf-image-000.png") center top / cover no-repeat;
}

.intent-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.72fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
  padding: clamp(44px, 7vw, 84px) clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fffdf8;
}

.intent-copy h2 {
  max-width: 780px;
}

.intent-copy p {
  max-width: 780px;
  color: var(--muted);
  font-size: 18px;
}

.keyword-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.keyword-chips span {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 16px;
  color: #3f382f;
  background: #f5efe6;
  font-size: 14px;
  font-weight: 800;
}

.pain-grid,
.service-grid,
.mode-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.panel,
.service-card,
.mode,
.about-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
}

.panel {
  min-height: 280px;
  padding: 30px;
}

.panel span,
.mode span,
.timeline span {
  display: inline-flex;
  margin-bottom: 28px;
  color: var(--warm-2);
  font-weight: 900;
}

.panel p,
.mode p,
.service-card p,
.solution-copy p,
.advantage-copy p,
.about-card p,
.contact-content p,
.timeline p {
  color: var(--muted);
}

.solution {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1fr);
  gap: clamp(32px, 6vw, 88px);
  align-items: center;
  color: var(--white);
  background:
    linear-gradient(120deg, rgba(39, 32, 25, 0.96), rgba(39, 32, 25, 0.84)),
    url("./assets/pdf-image-001.png") center / cover;
}

.solution-copy p {
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
}

.solution-steps {
  display: grid;
  gap: 14px;
}

.solution-steps div {
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.solution-steps b {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--warm);
}

.solution-steps strong {
  display: block;
  font-size: 24px;
}

.solution-steps p {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.72);
}

.services {
  background: #fffdf8;
}

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

.service-card {
  min-height: 390px;
  padding: 26px;
}

.icon {
  width: 52px;
  height: 52px;
  margin-bottom: 34px;
  display: grid;
  place-items: center;
  border-radius: 4px;
  color: #fff;
  background: var(--green);
  font-weight: 900;
}

.service-card ul {
  display: grid;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.service-card li {
  position: relative;
  padding-left: 16px;
  color: #4f473e;
  font-size: 14px;
}

.service-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 6px;
  height: 6px;
  background: var(--warm);
}

.modes {
  background: #f3ece1;
}

.mode {
  padding: 32px;
}

.advantages {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1fr);
  gap: clamp(34px, 6vw, 88px);
  align-items: center;
  background: #fffdf8;
}

.advantage-visual {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.advantage-visual img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.advantage-points {
  display: grid;
  gap: 12px;
  margin-top: 34px;
}

.advantage-points div {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.advantage-points strong,
.advantage-points span {
  display: block;
}

.advantage-points span {
  color: var(--muted);
}

.insights {
  background: #f3ece1;
}

.insights-page {
  padding-top: 150px;
  min-height: 100vh;
}

.insights-page h1 {
  max-width: 840px;
  color: var(--ink);
  font-size: clamp(44px, 7vw, 86px);
  line-height: 0.98;
}

.insights-teaser {
  background: #f3ece1;
}

.insights-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: end;
  margin-bottom: 28px;
}

.insights-head p {
  max-width: 780px;
  color: var(--muted);
  font-size: 18px;
}

.content-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.content-tabs button {
  min-height: 40px;
  padding: 0 18px;
  border: 1px solid rgba(21, 19, 15, 0.16);
  border-radius: 4px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.48);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.content-tabs button.is-active {
  color: #211912;
  border-color: var(--warm);
  background: var(--warm);
}

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

.content-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.content-card:hover,
.content-card:focus-visible {
  border-color: rgba(198, 154, 91, 0.62);
  box-shadow: 0 28px 70px rgba(39, 32, 25, 0.18);
  transform: translateY(-3px);
  outline: 0;
}

.content-card.is-hidden {
  display: none;
}

.content-cover {
  position: relative;
  min-height: 190px;
  display: flex;
  align-items: flex-end;
  padding: 22px;
  color: var(--white);
  background: var(--deep);
}

.content-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent, rgba(21, 19, 15, 0.72)),
    var(--cover-image, url("./assets/pdf-image-000.png")) center / cover;
  opacity: 0.78;
}

.content-cover span {
  position: relative;
  z-index: 1;
  color: var(--warm);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.note-cover::before {
  background:
    linear-gradient(180deg, transparent, rgba(21, 19, 15, 0.7)),
    var(--cover-image, url("./assets/company-reception.png")) center / cover;
}

.video-cover::before,
.article-cover::before {
  background:
    linear-gradient(180deg, transparent, rgba(21, 19, 15, 0.72)),
    var(--cover-image, url("./assets/pdf-image-004.png")) center / cover;
}

.content-body {
  padding: 24px;
}

.content-type {
  display: block;
  margin-bottom: 10px;
  color: var(--warm-2);
  font-size: 13px;
  font-weight: 900;
}

.content-body p {
  color: var(--muted);
}

.content-body time {
  color: #91877c;
  font-size: 13px;
}

.content-action {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  margin-top: 18px;
  padding: 0 14px;
  border: 1px solid rgba(198, 154, 91, 0.46);
  border-radius: 4px;
  color: var(--warm-2);
  font-size: 13px;
  font-weight: 900;
}

.content-modal[hidden] {
  display: none;
}

.content-modal {
  position: fixed;
  z-index: 60;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 22px;
}

.content-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(21, 19, 15, 0.62);
  backdrop-filter: blur(10px);
}

.content-modal__dialog {
  position: relative;
  z-index: 1;
  width: min(760px, 100%);
  max-height: min(82svh, 760px);
  overflow-y: auto;
  padding: clamp(28px, 5vw, 48px);
  border: 1px solid rgba(232, 223, 210, 0.9);
  border-radius: 8px;
  background: #fffdf8;
  box-shadow: 0 34px 100px rgba(21, 19, 15, 0.28);
}

.content-modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.82);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.content-modal__type {
  display: block;
  margin-bottom: 12px;
  color: var(--warm-2);
  font-size: 13px;
  font-weight: 900;
}

.content-modal__dialog h2 {
  max-width: 640px;
  margin-bottom: 12px;
  font-size: clamp(28px, 5vw, 44px);
}

.content-modal__dialog time {
  display: block;
  margin-bottom: 22px;
  color: #91877c;
  font-size: 13px;
}

.content-modal__summary {
  margin-bottom: 22px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
}

.content-modal__body {
  color: var(--muted);
}

.content-modal__body p {
  margin-bottom: 16px;
}

.content-modal__formatted h1,
.content-modal__formatted h2,
.content-modal__formatted h3 {
  margin: 22px 0 12px;
  color: var(--ink);
  font-size: clamp(22px, 4vw, 32px);
}

.content-modal__formatted ul,
.content-modal__formatted ol {
  display: grid;
  gap: 8px;
  margin: 0 0 18px;
  padding-left: 22px;
}

.content-modal__formatted blockquote {
  margin: 0 0 18px;
  padding: 12px 16px;
  border-left: 3px solid var(--gold);
  background: rgba(198, 154, 91, 0.1);
}

.content-modal__formatted a {
  color: var(--warm-2);
  font-weight: 800;
}

.content-modal__video {
  width: 100%;
  max-height: 420px;
  display: block;
  margin-bottom: 22px;
  border-radius: 8px;
  background: #15130f;
}

.content-modal__link {
  margin-top: 12px;
}

.content-modal__link[hidden] {
  display: none;
}

.process {
  color: var(--white);
  background: var(--deep);
}

.process .section-heading h2 {
  color: var(--white);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.timeline li {
  min-height: 330px;
  padding: 28px 24px;
  border-right: 1px solid rgba(255, 255, 255, 0.18);
}

.timeline li:last-child {
  border-right: 0;
}

.timeline h3 {
  color: var(--white);
}

.timeline p {
  color: rgba(255, 255, 255, 0.68);
}

.about {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(360px, 0.9fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: center;
  background:
    linear-gradient(90deg, rgba(251, 248, 241, 0.96), rgba(251, 248, 241, 0.86)),
    url("./assets/pdf-image-004.png") center / cover;
}

.about-card {
  width: min(820px, 100%);
  padding: clamp(30px, 5vw, 58px);
}

.about-hero {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding-top: 160px;
}

.next-links {
  background: #fffdf8;
}

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

.link-card {
  display: grid;
  min-height: 220px;
  align-content: start;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 26px;
  color: inherit;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
}

.link-card span {
  margin-bottom: 24px;
  color: var(--warm-2);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.link-card strong {
  margin-bottom: 10px;
  font-size: 22px;
}

.link-card p {
  margin: 0;
  color: var(--muted);
}

.office-showcase {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(420px, 1fr);
  gap: clamp(30px, 6vw, 82px);
  align-items: center;
  background: #fffdf8;
}

.office-copy p {
  max-width: 560px;
  color: var(--muted);
  font-size: 18px;
}

.office-photo {
  margin: 0;
}

.office-photo img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.office-photo figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.8fr);
  gap: clamp(28px, 6vw, 86px);
  padding: clamp(76px, 10vw, 124px) clamp(20px, 5vw, 72px);
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(21, 19, 15, 0.96), rgba(72, 85, 77, 0.84)),
    url("./assets/pdf-image-001.png") center / cover;
}

.contact-content p {
  max-width: 640px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
}

.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.22);
}

.contact-form label {
  display: grid;
  gap: 8px;
}

.contact-form label.full {
  grid-column: 1 / -1;
}

.contact-form span {
  color: var(--warm);
  font-size: 13px;
  font-weight: 800;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  min-height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 4px;
  padding: 12px 14px;
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  font: inherit;
  outline: none;
}

.contact-form textarea {
  resize: vertical;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(255, 255, 255, 0.46);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--warm);
  box-shadow: 0 0 0 3px rgba(198, 154, 91, 0.18);
}

.contact-form option {
  color: var(--ink);
}

.contact-form button {
  border: 0;
  cursor: pointer;
  font: inherit;
}

.form-note {
  align-self: center;
  margin: 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 22px clamp(20px, 5vw, 72px);
  color: #766e62;
  background: #f5efe6;
  font-size: 13px;
}

.footer p {
  margin: 0;
}

.ai-page {
  background: var(--paper);
}

.ai-main {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 138px 0 72px;
}

.ai-hero {
  padding: clamp(48px, 8vw, 96px) 0 clamp(30px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
}

.ai-hero h1 {
  max-width: 880px;
  color: var(--ink);
  font-size: clamp(44px, 7vw, 92px);
  line-height: 0.98;
}

.ai-hero p {
  max-width: 820px;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 24px);
}

.ai-section {
  padding: clamp(30px, 5vw, 56px) 0;
  border-bottom: 1px solid var(--line);
}

.ai-section h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 48px);
}

.ai-section p,
.ai-section li,
.ai-section dd {
  color: var(--muted);
}

.ai-grid dl {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
}

.ai-grid dl > div,
.ai-cards article {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.62);
}

.ai-grid dt {
  color: var(--warm-2);
  font-size: 13px;
  font-weight: 900;
}

.ai-grid dd {
  margin: 6px 0 0;
}

.ai-cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.ai-cards h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.ai-cards p {
  margin: 0;
  font-size: 14px;
}

.ai-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ai-keywords li {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  font-size: 14px;
}

.ai-section details {
  border-top: 1px solid var(--line);
  padding: 16px 0;
}

.ai-section details:last-child {
  border-bottom: 1px solid var(--line);
}

.ai-section summary {
  color: var(--ink);
  font-size: 18px;
  font-weight: 900;
  cursor: pointer;
}

.ai-section details p {
  margin-bottom: 0;
}

.ai-cta {
  border-bottom: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1120px) {
  .nav,
  .header-cta {
    display: none;
  }

  .site-header {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .menu-button {
    display: inline-flex;
    grid-column: 2;
    justify-self: end;
    align-items: center;
    justify-content: center;
    flex-direction: column;
  }

  .site-header.is-open .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: grid;
    gap: 0;
    justify-content: stretch;
    padding: 10px 20px 22px;
    background: rgba(251, 248, 241, 0.98);
    box-shadow: 0 16px 30px rgba(39, 32, 25, 0.08);
    max-height: calc(100svh - 72px);
    overflow-y: auto;
  }

  .site-header.is-open .nav a {
    display: block;
    padding: 13px 0;
    border-top: 1px solid var(--line);
    font-size: 16px;
  }

  .pain-grid,
  .service-grid,
  .mode-list,
  .content-grid,
  .solution,
  .advantages,
  .office-showcase,
  .about,
  .contact {
    grid-template-columns: 1fr 1fr;
  }

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

  .timeline {
    grid-template-columns: 1fr 1fr;
  }

  .insights-head {
    grid-template-columns: 1fr;
  }

  .timeline li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  }
}

@media (max-width: 760px) {
  .site-header {
    padding: 12px max(16px, env(safe-area-inset-right)) 12px max(16px, env(safe-area-inset-left));
    gap: 12px;
  }

  .brand {
    min-width: 0;
    gap: 10px;
  }

  .brand-mark {
    width: 30px;
    min-width: 30px;
    height: 34px;
    font-size: 30px;
  }

  .brand strong {
    font-size: 19px;
  }

  .brand small {
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .menu-button {
    width: 44px;
    min-width: 44px;
    height: 44px;
  }

  .hero {
    min-height: 100svh;
    padding: 108px 20px max(28px, env(safe-area-inset-bottom));
    align-content: end;
  }

  .hero-overlay {
    background:
      linear-gradient(180deg, rgba(15, 13, 10, 0.72), rgba(15, 13, 10, 0.24) 38%, rgba(15, 13, 10, 0.84)),
      linear-gradient(90deg, rgba(15, 13, 10, 0.8), rgba(15, 13, 10, 0.2));
  }

  .hero-content {
    padding-bottom: 28px;
  }

  .eyebrow {
    margin-bottom: 10px;
    font-size: 12px;
    letter-spacing: 0.08em;
  }

  h1 {
    margin-bottom: 18px;
    font-size: clamp(42px, 13vw, 56px);
    line-height: 1.05;
  }

  h2 {
    margin-bottom: 16px;
    font-size: clamp(28px, 8.4vw, 38px);
    line-height: 1.18;
  }

  h3 {
    font-size: 20px;
  }

  .hero-copy {
    margin-bottom: 24px;
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .button {
    min-height: 48px;
    padding: 0 14px;
    font-size: 15px;
  }

  .hero-stats,
  .intent-strip,
  .pain-grid,
  .service-grid,
  .mode-list,
  .link-grid,
  .content-grid,
  .solution,
  .advantages,
  .office-showcase,
  .about,
  .contact,
  .contact-form,
  .timeline {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    gap: 0;
  }

  .hero-stats div {
    padding: 16px 0 0;
  }

  .hero-stats strong {
    font-size: 32px;
  }

  .contact-form label.full {
    grid-column: auto;
  }

  .section {
    padding: 64px 20px;
  }

  .section-heading {
    margin-bottom: 28px;
  }

  .panel,
  .service-card,
  .mode {
    min-height: auto;
    padding: 22px;
  }

  .panel span,
  .mode span,
  .timeline span {
    margin-bottom: 18px;
  }

  .service-card {
    display: grid;
  }

  .intent-copy p {
    font-size: 16px;
  }

  .icon {
    margin-bottom: 22px;
  }

  .solution-steps div {
    padding: 22px;
  }

  .advantage-visual {
    order: 2;
  }

  .advantage-copy {
    order: 1;
  }

  .content-cover {
    min-height: 150px;
  }

  .content-body {
    padding: 22px;
  }

  .timeline li {
    min-height: auto;
    border-right: 0;
    padding: 24px 0;
  }

  .about-card {
    padding: 26px 22px;
  }

  .office-copy p,
  .contact-content p,
  .insights-head p,
  .solution-copy p {
    font-size: 16px;
  }

  .contact {
    gap: 28px;
    padding: 64px 20px;
  }

  .contact-form {
    gap: 12px;
    padding: 20px;
  }

  .contact-form input,
  .contact-form select,
  .contact-form textarea {
    min-height: 52px;
    font-size: 16px;
  }

  .contact-form button,
  .form-note {
    width: 100%;
  }

  .footer {
    display: grid;
  }

  .ai-main {
    width: min(100% - 32px, 1120px);
    padding-top: 110px;
  }

  .ai-grid dl,
  .ai-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 420px) {
  .hero-actions {
    grid-template-columns: 1fr;
  }

  .brand small {
    max-width: 130px;
  }

  .content-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .content-tabs button {
    padding: 0 12px;
  }
}

@media (max-width: 560px) {
  .hero-actions {
    grid-template-columns: 1fr;
  }
}