:root {
  --ink: #18223f;
  --muted: #5d6988;
  --soft: #eef7ff;
  --line: rgba(58, 96, 145, 0.16);
  --cyan: #24b7dd;
  --blue: #2f8df5;
  --violet: #5b3b9c;
  --purple: #6f3fa1;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(38, 70, 120, 0.16);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
  line-height: 1.7;
  background: #f5fbff;
}

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

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

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

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 76px;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(89, 112, 162, 0.13);
  backdrop-filter: blur(18px);
}

.site-header.is-scrolled {
  box-shadow: 0 14px 32px rgba(30, 67, 120, 0.08);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  color: #37256f;
  letter-spacing: 0;
}

.brand img {
  width: 42px;
  height: 42px;
}

.brand span {
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  padding: 10px 16px;
  border-radius: 999px;
  color: #30405f;
  font-size: 15px;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: #ffffff;
  background: linear-gradient(135deg, var(--blue), var(--violet));
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: calc(100vh - 76px);
  display: flex;
  align-items: center;
  background:
    linear-gradient(125deg, rgba(246, 252, 255, 0.94) 0%, rgba(238, 247, 255, 0.9) 44%, rgba(238, 236, 255, 0.94) 100%),
    radial-gradient(circle at 16% 16%, rgba(35, 183, 221, 0.2), transparent 30%),
    radial-gradient(circle at 88% 8%, rgba(111, 63, 161, 0.16), transparent 34%);
}

.hero::after,
.page-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 160px;
  background:
    linear-gradient(to top, rgba(25, 94, 166, 0.25), transparent),
    repeating-linear-gradient(90deg, rgba(46, 141, 245, 0.16) 0 1px, transparent 1px 22px);
  opacity: 0.4;
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.78fr);
  gap: 56px;
  align-items: center;
  padding: 96px 0 120px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}

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

h1 {
  margin-bottom: 24px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.08;
  letter-spacing: 0;
  color: #20174b;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.2;
  letter-spacing: 0;
  color: #21194f;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.35;
}

.hero-lede,
.page-hero-content p,
.section-heading p,
.copy-block p,
.service-band p,
.strategy-lanes p {
  color: var(--muted);
  font-size: 18px;
}

.hero-lede {
  max-width: 660px;
  margin-bottom: 34px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  border: 0;
  border-radius: 8px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  box-shadow: 0 18px 34px rgba(48, 114, 220, 0.25);
}

.btn-secondary {
  color: #34276f;
  background: #fff;
  border: 1px solid rgba(91, 59, 156, 0.18);
}

.hero-panel {
  position: relative;
  padding: 26px;
  border-radius: 8px;
  color: #fff;
  background:
    linear-gradient(145deg, rgba(42, 184, 219, 0.95), rgba(89, 57, 156, 0.98)),
    #53338f;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.18;
}

.panel-head,
.radar-card,
.metric-row {
  position: relative;
  z-index: 1;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 30px;
}

.panel-head span {
  font-size: 12px;
  opacity: 0.8;
}

.panel-head strong {
  font-size: 18px;
}

.radar-card {
  height: 340px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  display: grid;
  place-items: center;
}

.radar-card::before,
.radar-card::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
}

.radar-card::before {
  width: 230px;
  height: 230px;
}

.radar-card::after {
  width: 140px;
  height: 140px;
}

.radar-core {
  z-index: 1;
  width: 88px;
  height: 88px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #fff;
  color: #4b3294;
  font-size: 34px;
  font-weight: 900;
  box-shadow: 0 0 34px rgba(255, 255, 255, 0.45);
}

.radar-card span {
  position: absolute;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  font-size: 14px;
}

.radar-card span:nth-child(2) {
  left: 34px;
  top: 102px;
}

.radar-card span:nth-child(3) {
  right: 36px;
  top: 96px;
}

.radar-card span:nth-child(4) {
  left: 58px;
  bottom: 74px;
}

.radar-card span:nth-child(5) {
  right: 54px;
  bottom: 78px;
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.metric-row div {
  padding: 16px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.14);
}

.metric-row strong,
.metric-row span {
  display: block;
}

.metric-row strong {
  font-size: 20px;
}

.metric-row span {
  font-size: 13px;
  opacity: 0.76;
}

.hero-visual {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.pulse,
.orbit {
  position: absolute;
  border-radius: 50%;
}

.pulse {
  background: linear-gradient(135deg, rgba(36, 183, 221, 0.22), rgba(111, 63, 161, 0.18));
  filter: blur(1px);
}

.pulse-a {
  width: 340px;
  height: 340px;
  left: -120px;
  top: 110px;
}

.pulse-b {
  width: 260px;
  height: 260px;
  right: 4%;
  bottom: 90px;
}

.orbit {
  border: 1px solid rgba(88, 77, 164, 0.16);
  transform: rotate(-18deg);
}

.orbit-one {
  width: 680px;
  height: 240px;
  right: 10%;
  top: 22%;
}

.orbit-two {
  width: 840px;
  height: 320px;
  right: -12%;
  top: 15%;
}

.data-chip {
  position: absolute;
  padding: 8px 12px;
  border: 1px solid rgba(47, 141, 245, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  color: #43347f;
  font-size: 13px;
  box-shadow: 0 10px 30px rgba(58, 98, 145, 0.12);
}

.chip-a {
  top: 17%;
  right: 27%;
}

.chip-b {
  top: 64%;
  right: 39%;
}

.chip-c {
  bottom: 13%;
  right: 16%;
}

.section {
  padding: 96px 0;
  background:
    radial-gradient(circle at 8% 10%, rgba(36, 183, 221, 0.08), transparent 26%),
    #f5fbff;
}

.section-white {
  background: #fff;
}

.section-dark {
  color: #fff;
  background:
    linear-gradient(135deg, rgba(34, 28, 88, 0.98), rgba(80, 49, 146, 0.97) 52%, rgba(23, 148, 195, 0.92)),
    #291c5a;
}

.section-dark h2,
.section-dark h3 {
  color: #fff;
}

.section-dark p {
  color: rgba(255, 255, 255, 0.76);
}

.split {
  display: grid;
  grid-template-columns: minmax(240px, 0.75fr) minmax(0, 1.25fr);
  gap: 72px;
  align-items: start;
}

.copy-block p:last-child {
  margin-bottom: 0;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 40px;
}

.section-heading.compact {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

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

.feature-card,
.value-card,
.principle-grid article,
.solution-cards article,
.platform-grid article,
.scenario-grid article,
.operation-grid article,
.battle-map article,
.blueprint article,
.cooperation-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 14px 36px rgba(42, 92, 148, 0.08);
}

.feature-card {
  padding: 26px;
}

.icon-mark {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 22px;
  border-radius: 8px;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
}

.feature-card p,
.value-card p,
.principle-grid p,
.solution-cards p,
.platform-grid p,
.scenario-grid p,
.operation-grid p,
.battle-map p,
.blueprint p,
.cooperation-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.service-band {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(360px, 1fr);
  gap: 60px;
  align-items: center;
}

.service-stack {
  display: grid;
  gap: 16px;
}

.service-stack a {
  padding: 24px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.16);
  transition: transform 0.2s ease, background 0.2s ease;
}

.service-stack a:hover {
  transform: translateX(4px);
  background: rgba(255, 255, 255, 0.18);
}

.service-stack span {
  display: block;
  margin-bottom: 8px;
  color: #9beaff;
  font-weight: 800;
}

.service-stack strong {
  color: #fff;
  font-size: 18px;
}

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

.timeline::before {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  top: 30px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
}

.timeline article {
  position: relative;
  padding: 72px 22px 22px;
}

.timeline span {
  position: absolute;
  top: 0;
  left: 22px;
  display: inline-grid;
  place-items: center;
  min-width: 72px;
  height: 42px;
  padding: 0 12px;
  color: #fff;
  font-weight: 800;
  border-radius: 8px;
  background: linear-gradient(135deg, #22b7dc, #6f3fa1);
}

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

.cta-section {
  padding: 72px 0 96px;
  background: #fff;
}

.cta-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 42px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(245, 251, 255, 0.96), rgba(241, 237, 255, 0.96)),
    #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.cta-card h2 {
  margin-bottom: 0;
}

.site-footer {
  color: rgba(255, 255, 255, 0.74);
  background: #17173e;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.6fr 0.9fr;
  gap: 56px;
  padding: 58px 0 40px;
}

.footer-brand {
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand img {
  width: 36px;
  height: 36px;
}

.site-footer h3 {
  color: #fff;
  font-size: 16px;
}

.site-footer a {
  display: block;
  margin-bottom: 8px;
}

.site-footer p {
  margin-bottom: 8px;
}

.footer-bottom {
  padding: 18px 20px;
  text-align: center;
  color: rgba(255, 255, 255, 0.56);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.page-hero {
  position: relative;
  overflow: hidden;
  min-height: 430px;
  display: flex;
  align-items: center;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(24, 22, 76, 0.95), rgba(86, 54, 150, 0.9) 50%, rgba(28, 168, 208, 0.82)),
    #302064;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.25;
}

.page-hero-content {
  position: relative;
  z-index: 1;
  max-width: 850px;
  padding: 86px 0 110px;
}

.page-hero h1 {
  color: #fff;
  max-width: 820px;
}

.page-hero-content p {
  max-width: 700px;
  color: rgba(255, 255, 255, 0.78);
}

.value-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 18px;
}

.value-card {
  padding: 34px;
}

.value-card.tall {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(47, 141, 245, 0.92), rgba(91, 59, 156, 0.95)),
    #4c3294;
  color: #fff;
}

.value-card.tall h2,
.value-card.tall p {
  color: #fff;
}

.value-card.tall p:last-child {
  font-size: 24px;
  line-height: 1.55;
}

.story-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(360px, 1.15fr);
  gap: 60px;
  align-items: center;
}

.story-points {
  display: grid;
  gap: 16px;
}

.story-points article {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 18px;
  align-items: center;
  padding: 20px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.story-points span {
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  border-radius: 8px;
  color: #37256f;
  background: #fff;
  font-size: 26px;
  font-weight: 900;
}

.story-points p {
  margin-bottom: 0;
}

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

.principle-grid article {
  padding: 28px;
}

.model-map {
  position: relative;
  min-height: 520px;
  border-radius: 8px;
  border: 1px solid var(--line);
  overflow: hidden;
  background:
    radial-gradient(circle at center, rgba(46, 141, 245, 0.22), transparent 34%),
    linear-gradient(135deg, rgba(245, 251, 255, 0.98), rgba(246, 241, 255, 0.96));
  box-shadow: var(--shadow);
}

.model-core {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 220px;
  height: 220px;
  display: grid;
  place-items: center;
  text-align: center;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  color: #fff;
  font-weight: 900;
  font-size: 24px;
  line-height: 1.4;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  box-shadow: 0 0 0 34px rgba(47, 141, 245, 0.08), 0 0 0 74px rgba(91, 59, 156, 0.06);
}

.model-node {
  position: absolute;
  min-width: 160px;
  padding: 16px 20px;
  border-radius: 8px;
  text-align: center;
  color: #332869;
  font-weight: 800;
  background: #fff;
  box-shadow: 0 18px 42px rgba(45, 92, 150, 0.12);
  border: 1px solid var(--line);
}

.node-a {
  left: 12%;
  top: 16%;
}

.node-b {
  right: 12%;
  top: 16%;
}

.node-c {
  left: 8%;
  bottom: 18%;
}

.node-d {
  right: 8%;
  bottom: 18%;
}

.node-e {
  left: 50%;
  top: 8%;
  transform: translateX(-50%);
}

.node-f {
  left: 50%;
  bottom: 8%;
  transform: translateX(-50%);
}

.solution-detail {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: 52px;
  align-items: start;
}

.detail-copy {
  position: sticky;
  top: 110px;
}

.solution-cards {
  display: grid;
  gap: 18px;
}

.solution-cards article {
  padding: 28px;
}

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

.platform-grid article {
  padding: 28px;
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.16);
}

.platform-grid span {
  display: inline-flex;
  margin-bottom: 18px;
  color: #99edff;
  font-size: 22px;
  font-weight: 900;
}

.platform-grid p {
  color: rgba(255, 255, 255, 0.76);
}

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

.scenario-grid article {
  padding: 26px;
}

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

.operation-grid article {
  padding: 30px;
}

.operation-grid span,
.battle-map span,
.blueprint span {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 7px 12px;
  border-radius: 999px;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
}

.battle-map {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  counter-reset: step;
}

.battle-map article {
  position: relative;
  padding: 30px;
  overflow: hidden;
}

.battle-map article::after {
  counter-increment: step;
  content: "0" counter(step);
  position: absolute;
  right: 16px;
  bottom: -18px;
  color: rgba(47, 141, 245, 0.1);
  font-size: 82px;
  font-weight: 900;
}

.strategy-lanes {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(360px, 1fr);
  gap: 56px;
  align-items: center;
}

.lane-grid {
  display: grid;
  gap: 18px;
}

.lane-grid article {
  padding: 28px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.12);
}

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

.blueprint article {
  padding: 30px;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(360px, 1fr);
  gap: 58px;
  align-items: start;
}

.info-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.info-list article {
  padding: 20px;
  border-radius: 8px;
  background: #f5fbff;
  border: 1px solid var(--line);
}

.info-list span {
  display: block;
  margin-bottom: 8px;
  color: #352876;
  font-weight: 800;
}

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

.contact-form {
  padding: 30px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow);
}

.contact-form label {
  display: block;
  margin-bottom: 18px;
}

.contact-form label span {
  display: block;
  margin-bottom: 8px;
  color: #34276f;
  font-weight: 800;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid rgba(77, 104, 151, 0.18);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--ink);
  background: #f8fcff;
  outline: none;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(47, 141, 245, 0.12);
}

.form-note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
}

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

.cooperation-grid article {
  padding: 28px;
}

@media (max-width: 1080px) {
  .feature-grid,
  .platform-grid,
  .scenario-grid,
  .battle-map {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-grid,
  .service-band,
  .story-grid,
  .solution-detail,
  .strategy-lanes,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .detail-copy {
    position: static;
  }

  .hero-panel {
    max-width: 560px;
  }
}

@media (max-width: 860px) {
  .site-header {
    padding: 0 20px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: 76px;
    left: 20px;
    right: 20px;
    display: none;
    padding: 12px;
    border-radius: 8px;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    box-shadow: var(--shadow);
    border: 1px solid var(--line);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    border-radius: 8px;
  }

  .brand span {
    max-width: 62vw;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .hero-grid {
    padding: 72px 0 94px;
  }

  .split,
  .operation-grid,
  .blueprint,
  .footer-grid,
  .timeline,
  .value-grid,
  .principle-grid,
  .cooperation-grid {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    display: none;
  }

  .value-card.tall {
    grid-row: auto;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 28px, 1180px);
  }

  .site-header {
    min-height: 68px;
  }

  .brand img {
    width: 36px;
    height: 36px;
  }

  .site-nav {
    top: 68px;
    left: 14px;
    right: 14px;
  }

  .hero {
    min-height: auto;
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 30px;
  }

  .hero-lede,
  .page-hero-content p,
  .section-heading p,
  .copy-block p,
  .service-band p,
  .strategy-lanes p {
    font-size: 16px;
  }

  .hero-actions,
  .cta-card {
    align-items: stretch;
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .hero-grid {
    gap: 34px;
  }

  .hero-panel {
    padding: 18px;
  }

  .panel-head,
  .metric-row {
    grid-template-columns: 1fr;
  }

  .panel-head {
    display: grid;
  }

  .radar-card {
    height: 280px;
  }

  .radar-card::before {
    width: 190px;
    height: 190px;
  }

  .radar-card span {
    font-size: 12px;
  }

  .section {
    padding: 72px 0;
  }

  .feature-grid,
  .platform-grid,
  .scenario-grid,
  .battle-map {
    grid-template-columns: 1fr;
  }

  .model-map {
    min-height: 620px;
  }

  .model-core {
    width: 170px;
    height: 170px;
    font-size: 19px;
  }

  .model-node {
    min-width: 132px;
    padding: 12px;
    font-size: 13px;
  }

  .node-a {
    left: 5%;
    top: 16%;
  }

  .node-b {
    right: 5%;
    top: 16%;
  }

  .node-c {
    left: 5%;
    bottom: 18%;
  }

  .node-d {
    right: 5%;
    bottom: 18%;
  }

  .node-e {
    top: 6%;
  }

  .node-f {
    bottom: 6%;
  }

  .contact-form,
  .cta-card {
    padding: 24px;
  }
}