:root {
  --primary: #165DFF;
  --primary-dark: #0B3BA7;
  --primary-deep: #082B73;
  --cyan: #16A7D8;
  --light-blue: #E8F3FF;
  --ink: #142033;
  --text: #344054;
  --muted: #667085;
  --line: #DCE5F0;
  --surface: #F7F9FC;
  --white: #FFFFFF;
  --dark: #091A31;
  --shadow-sm: 0 8px 24px rgba(12, 45, 96, 0.08);
  --shadow-lg: 0 22px 55px rgba(10, 44, 100, 0.16);
  --container: 1200px;
  --header-height: 78px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

button,
select {
  cursor: pointer;
}

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

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.24;
  letter-spacing: 0;
}

.container {
  width: min(calc(100% - 48px), var(--container));
  margin-inline: auto;
}

.section {
  padding: 112px 0;
}

.svg-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

svg {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: var(--white);
  background: var(--primary);
  transform: translateY(-150%);
  transition: transform 0.2s ease;
}

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

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid rgba(220, 229, 240, 0.8);
  transition: box-shadow 0.25s ease;
}

.site-header.scrolled {
  box-shadow: 0 8px 30px rgba(13, 43, 91, 0.1);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 100%;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 11px;
}

.brand img {
  width: 52px;
  height: 44px;
  object-fit: cover;
  object-position: center;
  border-radius: 4px;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-copy strong {
  color: var(--ink);
  font-size: 18px;
}

.brand-copy small {
  margin-top: 3px;
  color: #778399;
  font-size: 9px;
  font-weight: 700;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 38px;
  margin-left: auto;
}

.desktop-nav a {
  position: relative;
  padding: 27px 0 24px;
  color: #344054;
  font-size: 15px;
  font-weight: 600;
  transition: color 0.2s ease;
}

.desktop-nav a::after {
  position: absolute;
  right: 50%;
  bottom: 17px;
  left: 50%;
  height: 2px;
  background: var(--primary);
  content: "";
  transition: right 0.2s ease, left 0.2s ease;
}

.desktop-nav a:hover,
.desktop-nav a.active {
  color: var(--primary);
}

.desktop-nav a:hover::after,
.desktop-nav a.active::after {
  right: 0;
  left: 0;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-left: 34px;
  padding: 11px 16px;
  color: var(--white);
  background: var(--primary);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
  transition: background 0.2s ease, transform 0.2s ease;
}

.header-cta svg {
  width: 17px;
  height: 17px;
}

.header-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0;
  color: var(--ink);
  background: transparent;
  border: 0;
}

.menu-toggle svg {
  width: 26px;
  height: 26px;
}

.menu-toggle .close-icon,
.menu-toggle.is-open .menu-icon {
  display: none;
}

.menu-toggle.is-open .close-icon {
  display: block;
}

.mobile-nav {
  display: none;
}

.hero {
  position: relative;
  height: clamp(560px, calc(100svh - 108px), 760px);
  min-height: 560px;
  overflow: hidden;
  background: var(--dark);
}

.hero-slide {
  position: absolute;
  inset: 0;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0.8s, opacity 0.8s ease;
}

.hero-slide.active {
  visibility: visible;
  opacity: 1;
}

.hero-slide > img {
  position: absolute;
  inset: 0;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.03);
  transition: transform 7s ease;
}

.hero-slide.active > img {
  transform: scale(1);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(5, 22, 49, 0.9) 0%, rgba(5, 22, 49, 0.66) 46%, rgba(5, 22, 49, 0.18) 76%, rgba(5, 22, 49, 0.06) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
  padding-bottom: 28px;
  color: var(--white);
}

.hero-kicker,
.section-kicker {
  margin-bottom: 18px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-kicker {
  display: flex;
  align-items: center;
  color: #BFD9FF;
}

.hero-kicker::before {
  width: 34px;
  height: 2px;
  margin-right: 12px;
  background: #4B90FF;
  content: "";
}

.hero h1,
.hero h2 {
  max-width: 760px;
  margin-bottom: 23px;
  color: var(--white);
  font-size: 58px;
  font-weight: 750;
}

.hero-content > p:not(.hero-kicker) {
  max-width: 650px;
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 18px;
  line-height: 1.8;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 700;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.button svg {
  width: 18px;
  height: 18px;
  margin-left: 9px;
}

.button-primary {
  color: var(--white);
  background: var(--primary);
  box-shadow: 0 10px 28px rgba(22, 93, 255, 0.28);
}

.button-primary:hover {
  background: #0F4DD8;
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(22, 93, 255, 0.34);
}

.button-ghost {
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.48);
}

.button-ghost:hover {
  background: var(--white);
  color: var(--primary-deep);
  transform: translateY(-2px);
}

.hero-controls {
  position: absolute;
  z-index: 5;
  right: max(24px, calc((100% - var(--container)) / 2));
  bottom: 34px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.slider-arrow {
  display: grid;
  width: 42px;
  height: 42px;
  padding: 0;
  color: var(--white);
  background: rgba(8, 28, 58, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.36);
  border-radius: 50%;
  place-items: center;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.slider-arrow:hover {
  background: var(--primary);
  border-color: var(--primary);
}

.slider-arrow svg {
  width: 19px;
  height: 19px;
}

.slider-dots {
  display: flex;
  gap: 7px;
}

.slider-dot {
  width: 24px;
  height: 3px;
  padding: 0;
  background: rgba(255, 255, 255, 0.38);
  border: 0;
  border-radius: 0;
  transition: width 0.2s ease, background 0.2s ease;
}

.slider-dot.active {
  width: 42px;
  background: var(--white);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.65fr);
  align-items: end;
  gap: 64px;
  margin-bottom: 54px;
}

.section-heading h2,
.intro-copy h2,
.culture-intro h2,
.contact-copy h2 {
  margin-bottom: 0;
  font-size: 42px;
}

.section-heading > p {
  margin-bottom: 4px;
  color: var(--muted);
}

.section-heading .section-kicker {
  margin-bottom: 12px;
}

.intro-section {
  overflow: hidden;
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(480px, 1.1fr);
  align-items: center;
  gap: 84px;
}

.intro-copy .section-lead {
  margin-top: 31px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 600;
}

.intro-copy > p:not(.section-kicker):not(.section-lead) {
  color: var(--muted);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 13px;
  color: var(--primary);
  font-weight: 700;
}

.text-link svg {
  width: 18px;
  height: 18px;
  transition: transform 0.2s ease;
}

.text-link:hover svg {
  transform: translateX(5px);
}

.intro-visual {
  position: relative;
  min-height: 450px;
  padding: 0 0 48px 48px;
}

.intro-visual::before {
  position: absolute;
  z-index: -1;
  top: -34px;
  right: -140px;
  width: 86%;
  height: 92%;
  background: var(--light-blue);
  content: "";
}

.intro-visual > img {
  height: 402px;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
}

.intro-caption {
  position: absolute;
  right: -24px;
  bottom: 0;
  display: grid;
  grid-template-columns: 62px 1fr;
  align-items: center;
  width: min(410px, 80%);
  min-height: 110px;
  padding: 19px 23px;
  color: var(--white);
  background: var(--primary-deep);
}

.intro-caption span {
  color: #65AEFF;
  font-size: 30px;
  font-weight: 800;
}

.intro-caption p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  line-height: 1.65;
}

.intro-caption strong {
  display: block;
  color: var(--white);
  font-size: 15px;
}

.audience-strip {
  display: grid;
  grid-template-columns: auto 1fr 28px 1fr 28px 1fr 28px 1fr;
  align-items: center;
  gap: 18px;
  margin-top: 84px;
  padding: 25px 30px;
  background: var(--surface);
  border-top: 2px solid var(--primary);
}

.audience-strip > p {
  margin: 0 20px 0 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.audience-strip div {
  display: flex;
  align-items: center;
  gap: 11px;
}

.audience-strip div span {
  display: grid;
  width: 35px;
  height: 35px;
  color: var(--primary);
  background: var(--light-blue);
  border-radius: 50%;
  font-size: 14px;
  font-weight: 800;
  place-items: center;
}

.audience-strip div strong {
  color: var(--ink);
  font-size: 14px;
}

.audience-strip i {
  position: relative;
  height: 1px;
  background: #B8C7DB;
}

.audience-strip i::after {
  position: absolute;
  top: -3px;
  right: 0;
  width: 7px;
  height: 7px;
  border-top: 1px solid #92A5BE;
  border-right: 1px solid #92A5BE;
  content: "";
  transform: rotate(45deg);
}

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

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.service-card {
  position: relative;
  min-height: 392px;
  padding: 30px 26px 28px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid #E4EAF2;
  border-radius: 6px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.service-card::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--primary);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.service-card:hover {
  border-color: #C5D8FF;
  box-shadow: var(--shadow-lg);
  transform: translateY(-8px);
}

.service-card:hover::after {
  transform: scaleX(1);
}

.service-number {
  position: absolute;
  top: 19px;
  right: 23px;
  color: #D7E0ED;
  font-size: 28px;
  font-weight: 800;
}

.service-icon {
  display: grid;
  width: 52px;
  height: 52px;
  margin-bottom: 30px;
  color: var(--primary);
  background: var(--light-blue);
  border-radius: 6px;
  place-items: center;
}

.service-icon svg {
  width: 26px;
  height: 26px;
}

.service-card h3 {
  margin-bottom: 14px;
  font-size: 21px;
}

.service-card p {
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 14px;
}

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

.service-card li {
  padding: 5px 9px;
  color: #3E5D8B;
  background: #F0F5FC;
  font-size: 12px;
}

.platform-feature {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  margin-top: 54px;
  overflow: hidden;
  background: var(--primary-deep);
  border-radius: 6px;
}

.platform-shot {
  min-height: 390px;
  padding: 44px 0 44px 44px;
}

.platform-shot img {
  height: 100%;
  min-height: 302px;
  object-fit: cover;
  object-position: left center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}

.platform-copy {
  align-self: center;
  padding: 54px;
  color: rgba(255, 255, 255, 0.72);
}

.platform-copy > span {
  color: #7DB4FF;
  font-size: 13px;
  font-weight: 800;
}

.platform-copy h3 {
  margin: 14px 0 20px;
  color: var(--white);
  font-size: 30px;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 27px;
}

.feature-tags span {
  padding: 7px 11px;
  color: #D7E8FF;
  border: 1px solid rgba(148, 190, 255, 0.35);
  font-size: 12px;
}

.cases-section {
  position: relative;
  overflow: hidden;
  color: rgba(255, 255, 255, 0.72);
  background: var(--dark);
}

.cases-section::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 34%;
  height: 4px;
  background: var(--cyan);
  content: "";
}

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

.section-heading.light > p {
  color: rgba(255, 255, 255, 0.6);
}

.section-heading.light .section-kicker {
  color: #64B5F0;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: start;
  gap: 22px;
}

.case-card {
  overflow: hidden;
  color: var(--text);
  background: var(--white);
  border-radius: 6px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.case-card.featured {
  transform: translateY(22px);
}

.case-card:hover {
  box-shadow: 0 24px 58px rgba(0, 0, 0, 0.28);
  transform: translateY(-7px);
}

.case-card.featured:hover {
  transform: translateY(15px);
}

.case-image {
  position: relative;
  height: 225px;
  overflow: hidden;
  background: #DDE6F2;
}

.case-image img {
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.case-card:hover .case-image img {
  transform: scale(1.045);
}

.case-image span {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 5px 10px;
  color: var(--primary-deep);
  background: rgba(255, 255, 255, 0.92);
  border-radius: 3px;
  font-size: 12px;
  font-weight: 800;
}

.case-body {
  padding: 28px;
}

.case-type {
  margin-bottom: 8px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
}

.case-body h3 {
  margin-bottom: 13px;
  font-size: 21px;
}

.case-body > p:not(.case-type) {
  min-height: 72px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 14px;
}

.case-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  padding-top: 19px;
  border-top: 1px solid var(--line);
}

.case-metrics div + div {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.case-metrics strong,
.case-metrics span {
  display: block;
}

.case-metrics strong {
  color: var(--primary);
  font-size: 20px;
  line-height: 1.3;
}

.case-metrics span {
  margin-top: 5px;
  color: #7C8798;
  font-size: 11px;
}

.data-note {
  margin: 52px 0 0;
  color: rgba(255, 255, 255, 0.42);
  font-size: 12px;
  text-align: center;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.advantage-item {
  position: relative;
  padding: 38px 28px 42px;
}

.advantage-item + .advantage-item {
  border-left: 1px solid var(--line);
}

.advantage-item > span {
  position: absolute;
  top: 24px;
  right: 24px;
  color: #DDE5EF;
  font-size: 28px;
  font-weight: 800;
}

.advantage-item > svg {
  width: 34px;
  height: 34px;
  margin-bottom: 28px;
  color: var(--primary);
}

.advantage-item h3 {
  margin-bottom: 12px;
  font-size: 20px;
}

.advantage-item p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.culture-band {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 70px;
  margin-top: 70px;
  padding: 58px 64px;
  background: var(--light-blue);
}

.culture-intro p:last-child {
  margin: 26px 0 0;
  color: var(--muted);
}

.culture-values {
  display: grid;
  gap: 12px;
}

.culture-values div {
  display: grid;
  grid-template-columns: 48px 1fr;
  align-items: center;
  gap: 18px;
  padding: 18px 22px;
  background: rgba(255, 255, 255, 0.74);
  border-left: 3px solid var(--primary);
}

.culture-values svg {
  width: 28px;
  height: 28px;
  color: var(--primary);
}

.culture-values span {
  color: var(--muted);
  font-size: 14px;
}

.culture-values strong {
  display: block;
  margin-bottom: 2px;
  color: var(--ink);
  font-size: 16px;
}

.contact-section {
  color: rgba(255, 255, 255, 0.72);
  background: var(--primary-deep);
}

.contact-grid {
  display: block;
}

.contact-copy {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(440px, 1.15fr);
  align-items: start;
  gap: 0 100px;
}

.contact-copy .section-kicker {
  grid-column: 1;
  grid-row: 1;
  color: #79B3FF;
}

.contact-copy h2 {
  grid-column: 1;
  grid-row: 2;
  margin-bottom: 26px;
  color: var(--white);
}

.contact-copy > p:not(.section-kicker) {
  grid-column: 1;
  grid-row: 3;
  max-width: 520px;
}

.contact-list {
  grid-column: 2;
  grid-row: 1 / 4;
  display: grid;
  gap: 24px;
  margin-top: 0;
  padding: 34px 38px;
  background: rgba(255, 255, 255, 0.05);
  border-left: 2px solid #4B90FF;
}

.contact-list > div {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
}

.contact-list svg {
  width: 24px;
  height: 24px;
  margin-top: 4px;
  color: #72B0FF;
}

.contact-list span,
.contact-list small,
.contact-list strong {
  display: block;
}

.contact-list small {
  margin-bottom: 3px;
  color: rgba(255, 255, 255, 0.47);
  font-size: 12px;
}

.contact-list strong,
.contact-list a {
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
}

.contact-list a:hover {
  text-decoration: underline;
}

.site-footer {
  color: rgba(255, 255, 255, 0.55);
  background: #061426;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 0.7fr 0.9fr 1fr;
  gap: 56px;
  padding-top: 64px;
  padding-bottom: 54px;
}

.brand-light .brand-copy strong {
  color: var(--white);
}

.footer-brand > p {
  max-width: 300px;
  margin: 23px 0 0;
  font-size: 13px;
}

.footer-links,
.footer-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 9px;
}

.footer-links h3,
.footer-contact h3 {
  margin-bottom: 9px;
  color: var(--white);
  font-size: 14px;
}

.footer-links a,
.footer-contact a,
.footer-contact p {
  margin: 0;
  font-size: 12px;
}

.footer-links a:hover,
.footer-contact a:hover {
  color: var(--white);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 19px;
  padding-bottom: 19px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-bottom p {
  margin: 0;
  font-size: 11px;
}

.back-to-top {
  position: fixed;
  z-index: 80;
  right: 22px;
  bottom: 22px;
  display: grid;
  visibility: hidden;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--white);
  background: var(--primary);
  border: 0;
  border-radius: 4px;
  box-shadow: 0 10px 28px rgba(22, 93, 255, 0.3);
  opacity: 0;
  place-items: center;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}

.back-to-top.visible {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  transform: rotate(90deg);
}

.motion-ready .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.motion-ready .reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

.service-grid .reveal:nth-child(2),
.advantage-grid .reveal:nth-child(2),
.case-grid .reveal:nth-child(2) {
  transition-delay: 0.08s;
}

.service-grid .reveal:nth-child(3),
.advantage-grid .reveal:nth-child(3),
.case-grid .reveal:nth-child(3) {
  transition-delay: 0.16s;
}

.service-grid .reveal:nth-child(4),
.advantage-grid .reveal:nth-child(4) {
  transition-delay: 0.24s;
}

@media (max-width: 1080px) {
  .desktop-nav {
    gap: 24px;
  }

  .header-cta {
    margin-left: 24px;
  }

  .intro-grid {
    gap: 54px;
  }

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

  .advantage-item:nth-child(3) {
    border-left: 0;
  }

  .advantage-item:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .contact-copy {
    gap: 60px;
  }
}

@media (max-width: 900px) {
  :root {
    --header-height: 70px;
  }

  .section {
    padding: 88px 0;
  }

  .desktop-nav,
  .header-cta {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .mobile-nav {
    position: fixed;
    z-index: 99;
    top: var(--header-height);
    right: 0;
    left: 0;
    display: flex;
    visibility: hidden;
    flex-direction: column;
    padding: 14px 24px 28px;
    background: var(--white);
    border-top: 1px solid var(--line);
    box-shadow: 0 18px 38px rgba(10, 40, 85, 0.12);
    opacity: 0;
    transform: translateY(-12px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  }

  .mobile-nav.open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .mobile-nav a {
    padding: 13px 0;
    color: var(--ink);
    border-bottom: 1px solid #EDF1F6;
    font-weight: 650;
  }

  .hero h1,
  .hero h2 {
    font-size: 46px;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .intro-copy {
    max-width: 700px;
  }

  .intro-visual {
    min-height: 420px;
    margin-top: 10px;
  }

  .audience-strip {
    grid-template-columns: repeat(4, 1fr);
  }

  .audience-strip > p,
  .audience-strip i {
    display: none;
  }

  .audience-strip div {
    flex-direction: column;
    text-align: center;
  }

  .platform-feature,
  .culture-band,
  .contact-copy {
    grid-template-columns: 1fr;
  }

  .platform-shot {
    padding-right: 44px;
  }

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

  .case-card:last-child {
    grid-column: 1 / -1;
    width: calc(50% - 11px);
  }

  .case-card.featured,
  .case-card.featured:hover {
    transform: none;
  }

  .culture-band {
    gap: 38px;
  }

  .contact-copy {
    display: block;
  }

  .contact-list {
    margin-top: 44px;
  }

  .footer-main {
    grid-template-columns: 1.4fr 0.8fr 1fr;
  }

  .footer-contact {
    grid-column: 1 / -1;
  }
}

@media (max-width: 680px) {
  :root {
    --header-height: 66px;
  }

  .container {
    width: min(calc(100% - 32px), var(--container));
  }

  .section {
    padding: 72px 0;
  }

  .brand img {
    width: 45px;
    height: 38px;
  }

  .brand-copy strong {
    font-size: 16px;
  }

  .brand-copy small {
    font-size: 8px;
  }

  .hero {
    height: calc(100svh - 86px);
    min-height: 540px;
    max-height: 680px;
  }

  .hero-slide > img {
    object-position: 62% center;
  }

  .hero-overlay {
    background: linear-gradient(90deg, rgba(4, 20, 45, 0.91) 0%, rgba(4, 20, 45, 0.74) 68%, rgba(4, 20, 45, 0.45) 100%);
  }

  .hero-content {
    justify-content: flex-end;
    padding-bottom: 104px;
  }

  .hero h1,
  .hero h2 {
    margin-bottom: 18px;
    font-size: 37px;
  }

  .hero-content > p:not(.hero-kicker) {
    margin-bottom: 27px;
    font-size: 15px;
  }

  .hero-kicker {
    margin-bottom: 13px;
    font-size: 11px;
  }

  .button {
    min-height: 46px;
    padding: 0 19px;
    font-size: 14px;
  }

  .hero-controls {
    right: 16px;
    bottom: 25px;
  }

  .slider-arrow {
    width: 38px;
    height: 38px;
  }

  .section-heading h2,
  .intro-copy h2,
  .culture-intro h2,
  .contact-copy h2 {
    font-size: 32px;
  }

  .intro-copy .section-lead {
    margin-top: 24px;
    font-size: 16px;
  }

  .intro-visual {
    min-height: 330px;
    padding: 0 0 38px 20px;
  }

  .intro-visual > img {
    height: 300px;
  }

  .intro-caption {
    right: -8px;
    width: 88%;
    min-height: 98px;
  }

  .audience-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 14px;
    margin-top: 62px;
    padding: 24px 15px;
  }

  .service-grid,
  .case-grid,
  .advantage-grid {
    grid-template-columns: 1fr;
  }

  .service-card {
    min-height: 0;
  }

  .platform-shot {
    min-height: 0;
    padding: 22px;
  }

  .platform-shot img {
    min-height: 220px;
  }

  .platform-copy {
    padding: 12px 26px 34px;
  }

  .platform-copy h3 {
    font-size: 25px;
  }

  .case-card:last-child {
    grid-column: auto;
    width: 100%;
  }

  .case-image {
    height: 230px;
  }

  .advantage-item + .advantage-item,
  .advantage-item:nth-child(3) {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .culture-band {
    margin-top: 54px;
    padding: 37px 22px;
  }

  .culture-values div {
    grid-template-columns: 38px 1fr;
    padding: 15px;
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 38px 24px;
  }

  .footer-brand,
  .footer-contact {
    grid-column: 1 / -1;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 5px;
  }

  .back-to-top {
    right: 14px;
    bottom: 14px;
  }
}

@media (max-width: 390px) {
  .brand-copy small {
    display: none;
  }

  .hero h1,
  .hero h2 {
    font-size: 32px;
  }

  .hero-actions {
    gap: 9px;
  }

  .hero-actions .button {
    padding: 0 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .motion-ready .reveal {
    opacity: 1;
    transform: none;
  }
}