:root {
  --navy-950: #07152e;
  --navy-900: #0b1e3a;
  --navy-800: #12335b;
  --brand-700: #173e73;
  --brand-600: #1d4e89;
  --brand-500: #2f6fb2;
  --brand-100: #dce6f2;
  --brand-50: #f2f6fa;
  --ink: #111827;
  --ink-soft: #334155;
  --heading-ink: #17243a;
  --muted: #64748b;
  --line: #cfdeec;
  --surface: #f7faff;
  --surface-elevated: #ffffff;
  --surface-alt: #eaf2fb;
  --surface-deep: #dbe9f8;
  --gradient-page: linear-gradient(
    180deg,
    #f8fbff 0%,
    #eef5fc 52%,
    #f8fbff 100%
  );
  --gradient-soft: linear-gradient(
    135deg,
    #edf5fd 0%,
    #f8fbff 48%,
    #e3eef9 100%
  );
  --gradient-brand: linear-gradient(
    135deg,
    #0b1e3a 0%,
    #173e73 56%,
    #2f6fb2 100%
  );
  --gradient-brand-soft: linear-gradient(
    135deg,
    #173e73 0%,
    #1d4e89 54%,
    #2f6fb2 100%
  );
  --gradient-title: linear-gradient(
    100deg,
    #4a90d9 0%,
    #2f6fb2 48%,
    #173e73 100%
  );
  --success: #0b7a53;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 2px rgba(3, 19, 47, 0.06);
  --shadow-lg: 0 24px 60px rgba(3, 19, 47, 0.14);
  --container: 1240px;
  --header-height: 76px;
  --font:
    "Noto Sans SC", "HarmonyOS Sans SC", "MiSans", "PingFang SC",
    "Microsoft YaHei UI", "Microsoft YaHei", system-ui, -apple-system,
    BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display:
    "Noto Sans SC", "HarmonyOS Sans SC", "MiSans", "PingFang SC",
    "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  color-scheme: light;
  overflow-x: hidden;
}

body {
  margin: 0;
  padding-top: var(--header-height);
  color: var(--ink);
  background: var(--gradient-page);
  font-family: var(--font);
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0.005em;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

button,
[role="button"],
a {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

:focus-visible {
  outline: 3px solid rgba(47, 111, 178, 0.55);
  outline-offset: 3px;
}

::selection {
  color: #fff;
  background: var(--brand-600);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  transform: translateY(-160%);
  padding: 10px 16px;
  color: #fff;
  background: var(--navy-950);
  border-radius: var(--radius-sm);
  transition: transform 180ms ease;
}

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

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

.section {
  padding: 112px 0;
}

.section-sm {
  padding: 72px 0;
}

.section-alt {
  background: var(--gradient-soft);
  border-block: 1px solid rgba(207, 222, 236, 0.72);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  color: var(--brand-700);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.4;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 24px;
  height: 2px;
  background: currentColor;
  content: "";
}

.eyebrow-light {
  color: #9db8d6;
}

.display-title,
.section-title,
.page-title,
.statement-title {
  margin: 0;
  color: var(--heading-ink);
  font-family: var(--font-display);
  font-weight: 350;
  letter-spacing: -0.035em;
  line-height: 1.12;
}

.display-title {
  max-width: 760px;
  font-size: clamp(38px, 4.35vw, 58px);
}

.hero-title-line {
  display: block;
  white-space: nowrap;
}

.hero-title-accent-line {
  width: max-content;
}

.hero-ai {
  display: inline-block;
  color: var(--brand-600);
  background-image: linear-gradient(135deg, #63adf5 0%, #2478ca 48%, #12335b 100%);
  background-clip: text;
  -webkit-background-clip: text;
  font-family: "Arial Black", "Segoe UI Black", "Arial", var(--font-display);
  font-size: 1.04em;
  font-weight: 900;
  letter-spacing: -0.075em;
  line-height: 0.9;
  filter: drop-shadow(0 6px 14px rgba(29, 78, 137, 0.2));
  transform: translateY(0.015em);
  -webkit-text-fill-color: transparent;
}

.typewriter-stage {
  display: grid;
}

.typewriter-fallback,
.typewriter-output {
  grid-area: 1 / 1;
}

.typewriter-output {
  visibility: hidden;
}

.typewriter-title.is-typing .typewriter-fallback {
  visibility: hidden;
}

.typewriter-title.is-typing .typewriter-output {
  visibility: visible;
}

.typewriter-cursor {
  display: inline-block;
  width: 0.055em;
  height: 0.88em;
  margin-left: 0.08em;
  vertical-align: -0.06em;
  background: var(--brand-500);
}

.typewriter-title.is-typing .typewriter-cursor {
  animation: typewriter-cursor-blink 700ms step-end infinite;
}

.typewriter-title.is-complete .typewriter-cursor {
  animation: typewriter-cursor-blink 600ms step-end 3 forwards;
}

@keyframes typewriter-cursor-blink {
  0%,
  45% {
    opacity: 1;
  }

  46%,
  100% {
    opacity: 0;
  }
}

.display-title strong,
.section-title strong,
.page-title strong,
.statement-title strong {
  color: var(--brand-600);
  background-image: var(--gradient-title);
  background-clip: text;
  -webkit-background-clip: text;
  font-weight: 600;
  -webkit-text-fill-color: transparent;
}

@media (forced-colors: active) {
  .display-title strong,
  .section-title strong,
  .page-title strong,
  .statement-title strong,
  .error-title strong {
    background: none;
    color: CanvasText;
    -webkit-text-fill-color: currentColor;
  }

  .hero-ai {
    background: none;
    color: CanvasText;
    filter: none;
    -webkit-text-fill-color: currentColor;
  }
}

.section-title {
  max-width: 860px;
  font-size: clamp(34px, 4vw, 56px);
}

.page-title {
  max-width: 950px;
  font-size: clamp(38px, 4.8vw, 64px);
  text-wrap: balance;
  word-break: keep-all;
}

.statement-title {
  font-size: clamp(32px, 3.6vw, 52px);
}

@media (min-width: 901px) {
  .page-title strong {
    white-space: nowrap;
  }
}

.lead {
  max-width: 700px;
  margin: 28px 0 0;
  color: var(--ink-soft);
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.75;
}

.section-copy {
  max-width: 700px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.product-principle {
  margin: -4px 0 22px;
  color: var(--brand-700);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 650;
  letter-spacing: 0.04em;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  line-height: 1;
  transition:
    background-color 200ms ease,
    border-color 200ms ease,
    color 200ms ease,
    transform 200ms ease;
}

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

.button:active {
  transform: translateY(0) scale(0.98);
}

.button-primary {
  color: #fff;
  background: var(--brand-600);
}

.button-primary:hover {
  background: var(--brand-700);
}

.button-secondary {
  color: var(--ink);
  background: transparent;
  border-color: #b9c4d3;
}

.button-secondary:hover {
  border-color: var(--ink);
}

.button-light {
  color: var(--navy-950);
  background: #fff;
}

.button-ghost-light {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.42);
}

.icon-arrow {
  width: 18px;
  height: 18px;
  transition: transform 200ms ease;
}

.button:hover .icon-arrow,
.text-link:hover .icon-arrow {
  transform: translateX(3px);
}

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 100;
  width: 100%;
  background: rgba(247, 250, 255, 0.92);
  border-bottom: 1px solid rgba(207, 222, 236, 0.82);
  box-shadow: 0 8px 30px rgba(3, 19, 47, 0.06);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  min-width: max-content;
  align-items: center;
  gap: 11px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.brand-text {
  display: grid;
  line-height: 1.1;
}

.brand-name {
  font-size: 19px;
  font-weight: 750;
  letter-spacing: 0.08em;
}

.brand-company {
  margin-top: 5px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.04em;
}

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

.site-nav > a:not(.button) {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 8px 13px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 600;
}

.site-nav > a:not(.button)::after {
  position: absolute;
  right: 13px;
  bottom: 5px;
  left: 13px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: right;
  background: var(--brand-600);
  content: "";
  transition: transform 200ms ease;
}

.site-nav > a:not(.button):hover,
.site-nav > a[aria-current="page"]:not(.button) {
  color: var(--brand-700);
}

.site-nav > a:not(.button):hover::after,
.site-nav > a[aria-current="page"]:not(.button)::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  margin-left: 12px;
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
}

.menu-toggle svg {
  width: 22px;
  height: 22px;
}

.hero {
  overflow: hidden;
  padding: 86px 0 96px;
  background:
    radial-gradient(
      circle at 82% 8%,
      rgba(47, 111, 178, 0.18),
      transparent 34%
    ),
    radial-gradient(circle at 4% 92%, rgba(29, 78, 137, 0.08), transparent 30%),
    linear-gradient(145deg, #f8fbff 0%, #edf5fd 52%, #e1edf9 100%);
  border-bottom: 1px solid rgba(207, 222, 236, 0.72);
}

.hero-grid {
  display: grid;
  align-items: center;
  gap: clamp(42px, 6vw, 92px);
  grid-template-columns: minmax(0, 0.92fr) minmax(480px, 1.08fr);
}

.trust-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  margin-top: 28px;
  color: var(--muted);
  font-size: 14px;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--brand-700);
  font-weight: 700;
}

.trust-badge svg {
  width: 18px;
  height: 18px;
}

.hero-visual {
  position: relative;
  min-height: 610px;
  overflow: hidden;
  padding: 34px;
  color: #fff;
  background: var(--gradient-brand);
  border-radius: 4px 4px 80px 4px;
  box-shadow: var(--shadow-lg);
}

.hero-visual::before,
.hero-visual::after {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  content: "";
}

.hero-visual::before {
  top: -180px;
  right: -160px;
  width: 480px;
  height: 480px;
}

.hero-visual::after {
  right: -40px;
  bottom: -120px;
  width: 300px;
  height: 300px;
}

.visual-toolbar {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 26px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.visual-product {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.visual-product-mark {
  display: block;
  width: 40px;
  height: 40px;
  overflow: hidden;
  flex: 0 0 auto;
}

.visual-product-mark svg {
  width: 40px;
  height: 40px;
}

.visual-product-mark image {
  filter: brightness(0) invert(1);
}

.visual-label {
  color: rgba(255, 255, 255, 0.64);
  font-size: 12px;
}

.visual-kpis {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  margin-top: 28px;
  grid-template-columns: repeat(3, 1fr);
}

.visual-kpi {
  padding: 18px;
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
}

.visual-kpi span {
  display: block;
  color: rgba(255, 255, 255, 0.65);
  font-size: 12px;
}

.visual-kpi strong {
  display: block;
  margin-top: 8px;
  font-size: 24px;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.visual-main {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
  margin-top: 14px;
  grid-template-columns: 1.35fr 0.65fr;
}

.visual-chart,
.visual-tasks {
  padding: 20px;
  background: #fff;
  border-radius: 16px;
}

.visual-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--navy-950);
  font-size: 13px;
  font-weight: 700;
}

.visual-card-head span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
}

.chart-svg {
  width: 100%;
  margin-top: 22px;
}

.task-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.task-item {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--ink-soft);
  font-size: 12px;
}

.task-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  background: var(--brand-500);
  border-radius: 50%;
}

.visual-note {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 12px;
}

.visual-note::before {
  width: 18px;
  height: 1px;
  background: #8fafd3;
  content: "";
}

.at-glance {
  position: relative;
  overflow: hidden;
  color: #fff;
  background: var(--gradient-brand);
}

.at-glance::before {
  position: absolute;
  top: -260px;
  left: -220px;
  width: 600px;
  height: 600px;
  transform: rotate(45deg);
  background: linear-gradient(
    145deg,
    rgba(137, 181, 224, 0.24),
    rgba(47, 111, 178, 0)
  );
  content: "";
}

.glance-head {
  position: relative;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 64px;
}

.glance-head h2 {
  margin: 0;
  font-size: clamp(34px, 4vw, 54px);
  font-weight: 350;
  letter-spacing: -0.04em;
}

.glance-head p {
  max-width: 420px;
  margin: 0;
  color: #a9b9d2;
}

.glance-grid {
  position: relative;
  display: grid;
  gap: 0;
  grid-template-columns: repeat(4, 1fr);
}

.glance-item {
  min-height: 230px;
  padding: 0 30px;
  border-left: 1px solid rgba(255, 255, 255, 0.15);
}

.glance-item:first-child {
  padding-left: 0;
  border-left: 0;
}

.glance-index {
  color: #86a9d2;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.glance-item h3 {
  margin: 20px 0 12px;
  font-size: 20px;
  font-weight: 650;
}

.glance-item p {
  margin: 0;
  color: #a9b9d2;
  font-size: 15px;
}

.qihang-pain-grid {
  grid-template-columns: repeat(5, 1fr);
}

.qihang-pain-grid .glance-item {
  padding-inline: 24px;
}

.qihang-pain-grid .glance-item:first-child {
  padding-left: 0;
}

.history-section {
  color: #fff;
  background:
    radial-gradient(circle at 82% 18%, rgba(82, 157, 231, 0.24), transparent 32%),
    linear-gradient(135deg, #07152e 0%, #123866 58%, #2c74b8 100%);
}

.history-section .section-title,
.history-section .section-copy {
  color: #fff;
}

.history-section .section-title strong {
  background-image: linear-gradient(105deg, #b8dcff 0%, #79b9f4 52%, #fff 100%);
}

.history-section .section-copy {
  color: #c8dbee;
}

.history-list {
  max-width: 1040px;
  margin: 72px 0 0;
  padding: 0;
  list-style: none;
}

.history-item {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
}

.history-item time {
  padding-top: 24px;
  color: #9dcbf5;
  font-family: var(--font-display);
  font-size: clamp(30px, 3vw, 44px);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1;
}

.history-content {
  position: relative;
  min-height: 108px;
  padding: 23px 0 30px 46px;
  border-left: 1px solid rgba(255, 255, 255, 0.24);
}

.history-content::before {
  position: absolute;
  top: 34px;
  left: -6px;
  width: 11px;
  height: 11px;
  background: #91c9ff;
  border: 3px solid #163f70;
  border-radius: 50%;
  box-shadow: 0 0 0 6px rgba(145, 201, 255, 0.12);
  content: "";
}

.history-content p {
  max-width: 760px;
  margin: 0;
  color: #f4f8fc;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.7;
}

.history-item:last-child .history-content {
  min-height: auto;
  border-left-color: transparent;
}

.dual-core-grid {
  display: grid;
  gap: 24px;
  margin-top: 70px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.dual-core-card {
  position: relative;
  min-height: 430px;
  overflow: hidden;
  padding: 42px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line);
  border-radius: 4px 4px 48px 4px;
}

.dual-core-card::after {
  position: absolute;
  right: -120px;
  bottom: -150px;
  width: 320px;
  height: 320px;
  background: rgba(60, 130, 201, 0.08);
  border-radius: 50%;
  content: "";
}

.dual-core-card-accent {
  color: #fff;
  background: var(--gradient-brand);
  border-color: transparent;
}

.dual-core-card-accent::after {
  background: rgba(255, 255, 255, 0.08);
}

.dual-core-head {
  position: relative;
  z-index: 1;
  display: grid;
  align-items: start;
  gap: 22px;
  grid-template-columns: auto 1fr;
}

.dual-core-number {
  color: var(--brand-600);
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 450;
  letter-spacing: -0.05em;
  line-height: 1;
}

.dual-core-card-accent .dual-core-number {
  color: #8fc1f1;
}

.dual-core-kicker {
  color: var(--brand-700);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.12em;
}

.dual-core-card-accent .dual-core-kicker {
  color: #a9c8e7;
}

.dual-core-promise {
  position: relative;
  z-index: 1;
  display: inline-block;
  margin-top: 22px;
  color: var(--brand-700);
  font-size: 14px;
  font-weight: 750;
  letter-spacing: 0.08em;
}

.dual-core-card-accent .dual-core-promise {
  color: #b9daf7;
}

.dual-core-card h3 {
  margin: 8px 0 0;
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 500;
  letter-spacing: -0.035em;
}

.dual-core-card > p {
  position: relative;
  z-index: 1;
  max-width: 620px;
  margin: 34px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
}

.dual-core-card-accent > p {
  color: #dce9f6;
}

.dual-core-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
  margin: 34px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.dual-core-card-accent .dual-core-list {
  border-top-color: rgba(255, 255, 255, 0.18);
}

.dual-core-list li {
  position: relative;
  padding-left: 20px;
  color: var(--ink-soft);
}

.dual-core-list li::before {
  position: absolute;
  top: 0.68em;
  left: 0;
  width: 6px;
  height: 6px;
  background: var(--brand-500);
  border-radius: 50%;
  content: "";
}

.dual-core-card-accent .dual-core-list li {
  color: #e7f0f8;
}

.dual-core-card-accent .dual-core-list li::before {
  background: #83bdf4;
}

.section-heading-row {
  display: grid;
  align-items: end;
  gap: 50px;
  grid-template-columns: 1.2fr 0.8fr;
}

.section-heading-row .section-copy {
  margin: 0;
}

.service-stack {
  margin-top: 76px;
  border-top: 1px solid var(--line);
}

.service-row {
  display: grid;
  align-items: center;
  gap: 60px;
  padding: 54px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 88px 0.8fr 1fr auto;
}

.service-number {
  color: var(--brand-600);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.service-row h3 {
  margin: 0;
  font-size: clamp(24px, 2.6vw, 34px);
  font-weight: 500;
  letter-spacing: -0.03em;
}

.service-row p {
  max-width: 520px;
  margin: 0;
  color: var(--muted);
}

.round-link {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  border: 1px solid #aeb9c8;
  border-radius: 50%;
  transition:
    color 200ms ease,
    background-color 200ms ease,
    border-color 200ms ease,
    transform 200ms ease;
}

.round-link:hover {
  color: #fff;
  background: var(--gradient-brand-soft);
  border-color: var(--brand-600);
  transform: translateX(3px);
}

.round-link:active {
  transform: translateX(1px) scale(0.96);
}

.round-link svg {
  width: 20px;
}

.feature-split {
  display: grid;
  align-items: center;
  gap: clamp(54px, 8vw, 110px);
  grid-template-columns: 0.95fr 1.05fr;
}

.product-panel {
  position: relative;
  min-height: 570px;
  overflow: hidden;
  padding: 46px;
  color: #fff;
  background: var(--brand-600);
  border-radius: 4px 4px 80px 4px;
}

.product-panel::after {
  position: absolute;
  right: -120px;
  bottom: -180px;
  width: 430px;
  height: 430px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  content: "";
}

.product-panel-label {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.product-panel h3 {
  max-width: 500px;
  margin: 34px 0 0;
  font-size: clamp(38px, 4.5vw, 62px);
  font-weight: 400;
  letter-spacing: -0.05em;
  line-height: 1.1;
}

.product-panel-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  margin-top: 70px;
  grid-template-columns: repeat(2, 1fr);
}

.product-chip {
  padding: 17px 18px;
  background: rgba(3, 19, 47, 0.26);
  border: 1px solid rgba(255, 255, 255, 0.17);
  border-radius: 12px;
  font-size: 14px;
}

.check-list {
  display: grid;
  gap: 20px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  display: grid;
  align-items: start;
  gap: 14px;
  color: var(--ink-soft);
  grid-template-columns: 24px 1fr;
}

.check-list svg {
  width: 22px;
  margin-top: 3px;
  color: var(--brand-600);
}

.check-list strong {
  display: block;
  margin-bottom: 2px;
  color: var(--ink);
}

.process-grid {
  display: grid;
  gap: 1px;
  margin-top: 70px;
  background: var(--line);
  border: 1px solid var(--line);
  grid-template-columns: repeat(5, 1fr);
}

.process-item {
  min-height: 260px;
  padding: 30px 26px;
  background: rgba(255, 255, 255, 0.84);
}

.process-item span {
  color: var(--brand-600);
  font-size: 13px;
  font-weight: 700;
}

.process-item h3 {
  margin: 58px 0 12px;
  font-size: 20px;
  font-weight: 650;
}

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

.case-grid {
  display: grid;
  gap: 22px;
  margin-top: 70px;
  grid-template-columns: repeat(3, 1fr);
}

.case-card {
  display: flex;
  min-height: 520px;
  flex-direction: column;
  padding: 34px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--line);
  transition:
    border-color 220ms ease,
    box-shadow 220ms ease,
    transform 220ms ease;
}

.case-card:hover {
  border-color: #aabdd3;
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.case-industry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--brand-700);
  font-size: 13px;
  font-weight: 700;
}

.case-card h3 {
  margin: 50px 0 18px;
  font-size: 26px;
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.35;
}

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

.case-result {
  margin-top: auto;
  padding-top: 42px;
}

.case-result strong {
  display: block;
  color: var(--brand-600);
  font-size: clamp(34px, 3.6vw, 50px);
  font-weight: 550;
  letter-spacing: -0.05em;
  line-height: 1;
}

.case-result span {
  display: block;
  margin-top: 12px;
  color: var(--ink-soft);
  font-size: 14px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 30px;
  color: var(--brand-700);
  font-weight: 700;
}

.quote-section {
  color: #fff;
  background: var(--gradient-brand-soft);
}

.quote-section .section-title,
.quote-section .section-copy {
  color: #fff;
}

.quote-section .section-title strong {
  background-image: linear-gradient(105deg, #b8dcff 0%, #79b9f4 52%, #fff 100%);
}

.quote-section .section-copy {
  color: #c5d8eb;
}

.quote-grid {
  display: grid;
  align-items: start;
  gap: 72px;
  grid-template-columns: 0.35fr 1fr;
}

.quote-mark {
  color: rgba(255, 255, 255, 0.28);
  font-family: Georgia, serif;
  font-size: 160px;
  line-height: 0.7;
}

.quote-text {
  margin: 0;
  font-size: clamp(26px, 3.5vw, 44px);
  font-weight: 350;
  letter-spacing: -0.035em;
  line-height: 1.45;
}

.quote-source {
  margin-top: 34px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.cta-section {
  color: #fff;
  background: linear-gradient(135deg, #07152e 0%, #0b1e3a 58%, #173e73 100%);
}

.cta-grid {
  display: grid;
  align-items: end;
  gap: 60px;
  grid-template-columns: 1fr auto;
}

.cta-grid h2 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(30px, 3.8vw, 50px);
  font-weight: 350;
  letter-spacing: -0.05em;
  line-height: 1.15;
  text-wrap: balance;
  word-break: keep-all;
}

.cta-grid p {
  max-width: 680px;
  margin: 26px 0 0;
  color: #a9b9d2;
  font-size: 17px;
}

.site-footer {
  color: #dbe5f5;
  background: #020c1d;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  gap: 80px;
  padding: 70px 0 46px;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
}

.footer-brand .brand-name {
  color: #fff;
}

.footer-brand .brand-company {
  color: #8da2c1;
}

.footer-statement {
  max-width: 400px;
  margin: 28px 0 0;
  color: #8da2c1;
}

.footer-title {
  margin: 0 0 20px;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-links {
  display: grid;
  gap: 12px;
  color: #aebed4;
}

.footer-links a:hover {
  color: #fff;
}

.footer-contact {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-contact img {
  width: 92px;
  height: 92px;
  padding: 5px;
  background: #fff;
}

.footer-phone {
  display: block;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
}

.footer-contact small {
  color: #8da2c1;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0 30px;
  color: #7589a7;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 12px;
}

.footer-record {
  color: #aebed4;
  text-decoration: underline;
  text-decoration-color: rgba(174, 190, 212, 0.5);
  text-underline-offset: 3px;
}

.footer-records {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.footer-record--police {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-record--police img {
  width: 16px;
  height: 18px;
  flex: 0 0 auto;
  object-fit: contain;
}

.footer-record:hover {
  color: #fff;
  text-decoration-color: currentColor;
}

/* Internal pages */
.page-hero {
  overflow: hidden;
  padding: 100px 0 110px;
  background:
    radial-gradient(circle at 88% 0%, rgba(47, 111, 178, 0.2), transparent 34%),
    radial-gradient(
      circle at 8% 100%,
      rgba(29, 78, 137, 0.08),
      transparent 32%
    ),
    linear-gradient(145deg, #f8fbff 0%, #edf5fd 56%, #e2eef9 100%);
  border-bottom: 1px solid rgba(207, 222, 236, 0.72);
}

.page-hero-grid {
  display: grid;
  align-items: end;
  gap: 70px;
  grid-template-columns: 1fr 0.62fr;
}

.page-hero-aside {
  padding: 32px 0 6px 32px;
  border-left: 1px solid var(--line);
}

.page-hero-aside strong {
  display: block;
  margin-bottom: 14px;
  color: var(--brand-700);
  font-size: 13px;
  letter-spacing: 0.1em;
}

.page-hero-aside p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.blue-band {
  color: #fff;
  background: var(--gradient-brand-soft);
}

.blue-band-grid {
  display: grid;
  gap: 1px;
  background: rgba(255, 255, 255, 0.2);
  grid-template-columns: repeat(3, 1fr);
}

.blue-band-item {
  min-height: 280px;
  padding: 44px;
  background: rgba(7, 21, 46, 0.12);
}

.blue-band-item span {
  color: #c7d7ea;
  font-size: 13px;
  font-weight: 700;
}

.blue-band-item h2,
.blue-band-item h3 {
  margin: 40px 0 14px;
  font-size: 24px;
  font-weight: 550;
}

.blue-band-item p {
  margin: 0;
  color: #e3ebf4;
}

.module-grid {
  display: grid;
  gap: 1px;
  margin-top: 68px;
  background: var(--line);
  border: 1px solid var(--line);
  grid-template-columns: repeat(3, 1fr);
}

.module-card {
  min-height: 310px;
  padding: 34px;
  background: rgba(255, 255, 255, 0.86);
}

.module-icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  color: var(--brand-600);
  background: var(--brand-50);
  border-radius: 12px;
}

.module-icon svg {
  width: 24px;
  height: 24px;
}

.module-card h3 {
  margin: 44px 0 12px;
  font-size: 21px;
  font-weight: 650;
}

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

.metric-strip {
  display: grid;
  gap: 0;
  margin-top: 66px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  grid-template-columns: repeat(3, 1fr);
}

.metric {
  padding: 42px 30px;
  border-left: 1px solid var(--line);
}

.metric:first-child {
  padding-left: 0;
  border-left: 0;
}

.metric strong {
  display: block;
  color: var(--brand-600);
  font-size: clamp(38px, 4.5vw, 60px);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 1;
}

.metric span {
  display: block;
  margin-top: 14px;
  color: var(--muted);
}

.story-list {
  display: grid;
  gap: 100px;
  margin-top: 80px;
}

.story {
  display: grid;
  gap: 70px;
  padding-top: 70px;
  border-top: 1px solid var(--line);
  grid-template-columns: 0.62fr 1.38fr;
}

.story-meta {
  color: var(--brand-700);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.story-heading-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.story-solution {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 7px 12px;
  color: var(--brand-700);
  background: var(--brand-50);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  transition:
    color 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease;
}

.story-solution span {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.story-solution:hover {
  color: #fff;
  background: var(--brand-600);
  border-color: var(--brand-600);
}

.story-solution:hover span {
  color: #dce9f6;
}

.story h2 {
  margin: 18px 0 0;
  font-size: clamp(32px, 3.6vw, 48px);
  font-weight: 450;
  letter-spacing: -0.04em;
  line-height: 1.2;
}

.story-blocks {
  display: grid;
  gap: 34px;
}

.story-block h3 {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.story-block p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 17px;
}

.story-outcomes {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, 1fr);
}

.story-outcome {
  padding: 26px;
  color: #fff;
  background: var(--gradient-brand);
}

.story-outcome strong {
  display: block;
  color: #90b2d8;
  font-size: 34px;
  font-weight: 550;
}

.story-outcome span {
  color: #b9c6da;
  font-size: 14px;
}

.value-grid {
  display: grid;
  gap: 24px;
  margin-top: 70px;
  grid-template-columns: repeat(3, 1fr);
}

.value-card {
  padding: 36px;
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.82),
    rgba(219, 233, 248, 0.86)
  );
  border-top: 3px solid var(--brand-600);
}

.value-card h3 {
  margin: 32px 0 14px;
  font-size: 22px;
  font-weight: 650;
}

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

.capability-grid {
  display: grid;
  gap: 1px;
  margin-top: 70px;
  background: var(--line);
  border: 1px solid var(--line);
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.capability-card {
  min-height: 300px;
  padding: 36px 30px;
  background: rgba(255, 255, 255, 0.86);
}

.capability-card > span {
  color: var(--brand-700);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.11em;
}

.capability-card h3 {
  margin: 48px 0 14px;
  color: var(--heading-ink);
  font-size: 22px;
  font-weight: 650;
}

.capability-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.qihang-benefits {
  color: #fff;
  background: linear-gradient(135deg, #07152e 0%, #123866 58%, #2c74b8 100%);
}

.qihang-benefits .section-title,
.qihang-benefits .section-copy {
  color: #fff;
}

.qihang-benefits .section-title strong {
  background-image: linear-gradient(105deg, #b8dcff 0%, #79b9f4 48%, #fff 100%);
}

.qihang-benefits .section-copy {
  color: #c4d7eb;
}

.benefit-grid {
  display: grid;
  gap: 1px;
  margin-top: 70px;
  background: rgba(255, 255, 255, 0.18);
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.benefit-item {
  min-height: 250px;
  padding: 34px 28px;
  background: rgba(7, 21, 46, 0.22);
}

.benefit-item span {
  color: #8db8e1;
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.14em;
}

.benefit-item h3 {
  margin: 42px 0 14px;
  font-size: 24px;
  font-weight: 600;
}

.benefit-item p {
  margin: 0;
  color: #c5d8eb;
  font-size: 15px;
}

.text-link {
  display: inline-block;
  margin-left: 6px;
  color: var(--brand-700);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: rgba(32, 101, 172, 0.32);
  text-underline-offset: 4px;
}

.text-link:hover {
  color: var(--brand-500);
  text-decoration-color: currentColor;
}

.qihang-voices {
  background:
    radial-gradient(circle at 88% 12%, rgba(74, 144, 217, 0.14), transparent 34%),
    var(--surface);
}

.voice-grid {
  display: grid;
  gap: 22px;
  margin-top: 68px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.voice-card {
  position: relative;
  display: flex;
  min-height: 330px;
  margin: 0;
  padding: 36px 34px 32px;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid var(--line);
  border-radius: 4px 4px 36px 4px;
  box-shadow: 0 18px 50px rgba(18, 55, 94, 0.06);
}

.voice-mark {
  height: 46px;
  color: var(--brand-500);
  font-family: Georgia, serif;
  font-size: 64px;
  line-height: 1;
}

.voice-card blockquote {
  margin: 22px 0 34px;
  color: var(--heading-ink);
  font-size: 17px;
  line-height: 1.9;
}

.voice-card figcaption {
  display: flex;
  margin-top: auto;
  padding-top: 22px;
  align-items: baseline;
  justify-content: space-between;
  border-top: 1px solid var(--line);
}

.voice-card figcaption strong {
  color: var(--heading-ink);
  font-size: 15px;
}

.voice-card figcaption span {
  color: var(--muted);
  font-size: 13px;
}

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

.home-voice-card {
  min-height: 300px;
  background: rgba(248, 251, 255, 0.97);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 24px 60px rgba(1, 12, 31, 0.2);
}

.error-main {
  min-height: calc(100vh - 77px);
}

.error-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(76px, 9vw, 132px) 0;
  background: var(--gradient-soft);
}

.error-hero::before {
  position: absolute;
  top: -260px;
  right: -180px;
  width: 620px;
  height: 620px;
  background: radial-gradient(circle, rgba(74, 144, 217, 0.28), rgba(74, 144, 217, 0));
  content: "";
}

.error-grid {
  position: relative;
  z-index: 1;
  display: grid;
  align-items: center;
  gap: clamp(56px, 8vw, 120px);
  grid-template-columns: 1.04fr 0.96fr;
}

.error-title {
  max-width: 720px;
  margin: 0;
  color: var(--heading-ink);
  font-family: var(--font-display);
  font-size: clamp(44px, 5vw, 68px);
  font-weight: 350;
  letter-spacing: -0.045em;
  line-height: 1.08;
}

@media (min-width: 901px) {
  .error-title > span,
  .error-title strong {
    white-space: nowrap;
  }
}

.error-title strong {
  color: var(--brand-600);
  background-image: var(--gradient-title);
  background-clip: text;
  -webkit-background-clip: text;
  font-weight: 650;
  -webkit-text-fill-color: transparent;
}

.error-description {
  max-width: 640px;
  margin: 30px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
}

.error-help {
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.error-help a {
  color: var(--brand-700);
  font-weight: 750;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.error-visual {
  position: relative;
  display: grid;
  min-height: 560px;
  overflow: hidden;
  place-items: center;
  color: #88bcea;
  background: var(--gradient-brand);
  border-radius: 4px 4px 88px 4px;
  box-shadow: var(--shadow-lg);
}

.error-visual::after {
  position: absolute;
  right: -150px;
  bottom: -180px;
  width: 430px;
  height: 430px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  content: "";
}

.error-visual-label {
  position: absolute;
  top: 34px;
  left: 36px;
  color: #b8cee4;
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.13em;
}

.error-compass {
  width: min(78%, 360px);
}

.error-code {
  position: absolute;
  bottom: 52px;
  left: 36px;
  color: #fff;
  font-family: var(--font-display);
  font-size: clamp(76px, 10vw, 130px);
  font-weight: 350;
  letter-spacing: -0.075em;
  line-height: 0.8;
}

.error-route {
  position: absolute;
  right: 36px;
  bottom: 38px;
  color: #bed2e7;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.contact-layout {
  display: grid;
  align-items: start;
  gap: 90px;
  grid-template-columns: 1fr 0.8fr;
}

.contact-phone {
  display: inline-block;
  margin-top: 28px;
  color: var(--brand-600);
  font-size: clamp(36px, 4.4vw, 56px);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1;
}

.contact-card {
  position: relative;
  overflow: hidden;
  padding: 40px;
  color: var(--ink);
  background:
    radial-gradient(
      circle at 100% 0%,
      rgba(47, 111, 178, 0.18),
      transparent 44%
    ),
    linear-gradient(145deg, rgba(255, 255, 255, 0.94), rgba(219, 233, 248, 0.9));
  border: 1px solid rgba(47, 111, 178, 0.2);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(23, 62, 115, 0.12);
}

.contact-card::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-700), var(--brand-500));
  content: "";
}

.contact-card > * {
  position: relative;
  z-index: 1;
}

.contact-card img {
  width: 200px;
  height: 200px;
  margin: 0 auto;
  padding: 9px;
  background: #fff;
  border: 1px solid rgba(47, 111, 178, 0.16);
  border-radius: 16px;
  box-shadow: 0 14px 34px rgba(23, 62, 115, 0.12);
}

.contact-card h2 {
  margin: 30px 0 8px;
  color: var(--navy-900);
  text-align: center;
  font-size: 22px;
  font-weight: 600;
}

.contact-card p {
  margin: 0;
  color: var(--muted);
  text-align: center;
}

.contact-steps {
  display: grid;
  gap: 0;
  margin-top: 46px;
  border-top: 1px solid var(--line);
}

.contact-step {
  display: grid;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 44px 1fr;
}

.contact-step span {
  color: var(--brand-600);
  font-weight: 700;
}

.contact-step strong {
  display: block;
}

.contact-step p {
  margin: 4px 0 0;
  color: var(--muted);
}

/* Product demo directory */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.demo-hero .page-title {
  max-width: 860px;
  line-height: 1.14;
}

.demo-hero .page-hero-aside p {
  font-size: 16px;
}

.demo-directory .section-title {
  font-size: clamp(30px, 3.4vw, 48px);
}

.demo-directory .section-copy {
  font-size: 16px;
}

.demo-directory {
  background:
    radial-gradient(
      circle at 92% 10%,
      rgba(47, 111, 178, 0.1),
      transparent 28%
    ),
    var(--gradient-page);
}

.demo-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
  margin-top: 54px;
  margin-inline: auto;
  padding: 18px;
  max-width: 760px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(47, 111, 178, 0.16);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(14px);
}

.demo-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.demo-filter {
  min-height: 44px;
  padding: 9px 16px;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition:
    color 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

.demo-filter:hover {
  color: var(--brand-700);
  background: var(--brand-50);
  border-color: var(--brand-100);
}

.demo-filter:active {
  transform: scale(0.97);
}

.demo-filter.is-active {
  color: #fff;
  background: var(--brand-600);
  border-color: var(--brand-600);
}

.demo-search {
  position: relative;
  display: block;
  width: 100%;
  flex: 1 1 auto;
}

.demo-search svg {
  position: absolute;
  top: 50%;
  left: 15px;
  width: 18px;
  height: 18px;
  transform: translateY(-50%);
  color: var(--muted);
  pointer-events: none;
}

.demo-search input {
  width: 100%;
  min-height: 46px;
  padding: 10px 16px 10px 44px;
  color: var(--ink);
  background: rgba(247, 250, 255, 0.94);
  border: 1px solid var(--line);
  border-radius: 999px;
  outline: none;
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease;
}

.demo-search input::placeholder {
  color: #8290a4;
}

.demo-search input:focus {
  background: #fff;
  border-color: var(--brand-500);
  box-shadow: 0 0 0 4px rgba(47, 111, 178, 0.12);
}

.demo-stat-grid {
  display: grid;
  gap: 14px;
  margin-top: 22px;
  grid-template-columns: repeat(3, 1fr);
}

.demo-stat {
  position: relative;
  min-height: 122px;
  overflow: hidden;
  padding: 24px;
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.9),
    rgba(219, 233, 248, 0.78)
  );
  border: 1px solid rgba(47, 111, 178, 0.15);
  border-radius: 18px;
}

.demo-stat::after {
  position: absolute;
  top: -42px;
  right: -38px;
  width: 112px;
  height: 112px;
  background: rgba(47, 111, 178, 0.08);
  border-radius: 50%;
  content: "";
}

.demo-stat strong {
  position: relative;
  z-index: 1;
  display: block;
  color: var(--brand-600);
  font-size: 30px;
  font-weight: 550;
  line-height: 1;
}

.demo-stat span {
  position: relative;
  z-index: 1;
  display: block;
  margin-top: 13px;
  color: var(--muted);
  font-size: 12px;
}

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

.demo-grid {
  display: grid;
  gap: 16px;
  margin-top: 30px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.demo-subsection-heading {
  margin-top: 72px;
  padding-top: 54px;
  border-top: 1px solid rgba(47, 111, 178, 0.16);
}

.demo-subsection-heading .section-title {
  max-width: 720px;
}

.demo-subsection-heading.is-first-visible-group {
  margin-top: 38px;
  padding-top: 0;
  border-top: 0;
}

.demo-grid-apps {
  margin-top: 30px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.demo-grid-apps .demo-card {
  min-height: 244px;
}

.demo-card {
  display: flex;
  min-height: 244px;
  flex-direction: column;
  padding: 22px;
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.94),
    rgba(237, 245, 253, 0.9)
  );
  border: 1px solid rgba(47, 111, 178, 0.16);
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
  transition:
    transform 200ms ease,
    border-color 200ms ease,
    box-shadow 200ms ease;
}

.demo-card:hover {
  transform: translateY(-4px);
  border-color: rgba(29, 78, 137, 0.38);
  box-shadow: 0 20px 46px rgba(23, 62, 115, 0.12);
}

.demo-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.demo-card-icon {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  color: var(--brand-600);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--brand-100);
  border-radius: 12px;
}

.demo-card-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.demo-card h3 {
  margin: 18px 0 8px;
  color: var(--navy-900);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.4;
}

.demo-card > p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.72;
}

.demo-card-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  margin-top: auto;
  padding-top: 20px;
}

.demo-card-footer a {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  color: #fff;
  background: var(--brand-600);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  transition:
    background-color 180ms ease,
    transform 180ms ease;
}

.demo-cta .cta-grid p {
  font-size: 16px;
}

.demo-card-footer a:hover {
  background: var(--brand-700);
  transform: translateY(-2px);
}

.demo-card-footer a:active {
  transform: translateY(0) scale(0.97);
}

.demo-empty {
  margin-top: 38px;
  padding: 60px 24px;
  text-align: center;
  background: rgba(255, 255, 255, 0.66);
  border: 1px dashed rgba(47, 111, 178, 0.34);
  border-radius: 20px;
}

.demo-empty strong,
.demo-empty span {
  display: block;
}

.demo-empty strong {
  color: var(--navy-900);
  font-size: 20px;
}

.demo-empty span {
  margin-top: 8px;
  color: var(--muted);
}

.demo-pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid rgba(47, 111, 178, 0.16);
}

.demo-pagination-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.demo-pagination-summary strong {
  color: var(--navy-900);
  font-weight: 650;
}

.demo-pagination-controls,
.demo-pagination-pages {
  display: flex;
  align-items: center;
  gap: 8px;
}

.demo-pagination button {
  min-width: 40px;
  min-height: 40px;
  padding: 8px 12px;
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(47, 111, 178, 0.2);
  border-radius: 10px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition:
    color 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

.demo-pagination button:hover:not(:disabled) {
  color: var(--brand-700);
  background: #fff;
  border-color: var(--brand-400);
  transform: translateY(-1px);
}

.demo-pagination button[aria-current="page"] {
  color: #fff;
  background: var(--brand-600);
  border-color: var(--brand-600);
}

.demo-pagination button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.demo-pagination-ellipsis {
  min-width: 24px;
  color: var(--muted);
  text-align: center;
}

[hidden] {
  display: none !important;
}

.reveal {
  transition:
    opacity 420ms ease,
    transform 420ms ease;
}

.js .reveal {
  opacity: 0;
  transform: translateY(14px);
}

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

@media (max-width: 1100px) {
  .site-nav > a:not(.button) {
    padding-inline: 7px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(430px, 0.9fr);
  }

  .hero-visual {
    min-height: 560px;
    padding: 26px;
  }

  .visual-main {
    grid-template-columns: 1fr;
  }

  .visual-tasks {
    display: none;
  }

  .service-row {
    gap: 30px;
    grid-template-columns: 58px 0.8fr 1fr auto;
  }

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

  .qihang-pain-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .benefit-grid {
    grid-template-columns: repeat(5, 1fr);
  }

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

  .glance-item {
    margin-bottom: 44px;
  }

  .process-item:last-child {
    grid-column: 1 / -1;
  }

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

@media (max-width: 900px) {
  .section {
    padding: 86px 0;
  }

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

  .site-nav {
    position: fixed;
    top: var(--header-height);
    right: 0;
    z-index: 10;
    height: calc(100vh - var(--header-height));
    left: 0;
    display: grid;
    align-content: start;
    gap: 0;
    padding: 24px 20px 40px;
    transform: translateX(100%);
    visibility: hidden;
    background: var(--surface);
    overflow-y: auto;
    transition:
      transform 260ms ease,
      visibility 260ms ease;
  }

  .site-nav.is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .site-nav > a:not(.button) {
    min-height: 56px;
    padding: 12px 4px;
    border-bottom: 1px solid var(--line);
    font-size: 17px;
  }

  .site-nav > a:not(.button)::after {
    display: none;
  }

  .nav-cta {
    width: 100%;
    margin: 28px 0 0;
  }

  .hero-grid,
  .feature-split,
  .section-heading-row,
  .page-hero-grid,
  .contact-layout,
  .dual-core-grid,
  .error-grid {
    grid-template-columns: 1fr;
  }

  .error-visual {
    min-height: 520px;
  }

  .hero {
    padding-top: 64px;
  }

  .hero-visual {
    min-height: 600px;
  }

  .section-heading-row {
    align-items: start;
    gap: 26px;
  }

  .service-row {
    gap: 18px 26px;
    grid-template-columns: 52px 1fr auto;
  }

  .service-row p {
    grid-column: 2 / -1;
  }

  .case-grid,
  .module-grid,
  .value-grid,
  .capability-grid,
  .voice-grid {
    grid-template-columns: 1fr;
  }

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

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

  .qihang-pain-grid .glance-item:nth-child(5) {
    padding-left: 0;
    border-left: 0;
  }

  .history-list {
    margin-top: 52px;
  }

  .history-item {
    grid-template-columns: 104px minmax(0, 1fr);
  }

  .history-content {
    padding-left: 34px;
  }

  .case-card {
    min-height: 420px;
  }

  .quote-grid {
    gap: 10px;
    grid-template-columns: 1fr;
  }

  .quote-mark {
    font-size: 100px;
  }

  .cta-grid {
    align-items: start;
    grid-template-columns: 1fr;
  }

  .footer-grid {
    gap: 48px;
    grid-template-columns: 1fr 1fr;
  }

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

  .page-hero-aside {
    padding: 28px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .blue-band-grid,
  .metric-strip {
    grid-template-columns: 1fr;
  }

  .metric {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .metric:first-child {
    border-top: 0;
  }

  .story {
    gap: 40px;
    grid-template-columns: 1fr;
  }

  .demo-controls {
    align-items: stretch;
    flex-direction: column;
  }

  .demo-search {
    width: 100%;
    flex-basis: auto;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 32px), var(--container));
  }

  .section {
    padding: 72px 0;
  }

  .section-sm {
    padding: 54px 0;
  }

  .brand-company {
    display: none;
  }

  .display-title {
    font-size: clamp(29px, 9.2vw, 44px);
  }

  .page-title {
    font-size: clamp(36px, 9.5vw, 48px);
  }

  .contact-title {
    font-size: 38px;
  }

  .section-title {
    font-size: clamp(32px, 10vw, 42px);
  }

  .lead {
    font-size: 16px;
  }

  .hero-visual {
    min-height: 500px;
    padding: 20px;
    border-radius: 4px 4px 46px 4px;
  }

  .visual-kpis {
    grid-template-columns: 1fr 1fr;
  }

  .visual-kpi:last-child {
    display: none;
  }

  .visual-kpi strong {
    font-size: 20px;
  }

  .glance-head {
    align-items: start;
    flex-direction: column;
    margin-bottom: 44px;
  }

  .glance-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }

  .qihang-pain-grid {
    grid-template-columns: 1fr;
  }

  .glance-item,
  .glance-item:nth-child(3),
  .qihang-pain-grid .glance-item,
  .qihang-pain-grid .glance-item:nth-child(4) {
    min-height: auto;
    margin: 0;
    padding: 28px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    border-left: 0;
  }

  .service-stack {
    margin-top: 52px;
  }

  .service-row {
    grid-template-columns: 40px 1fr;
  }

  .service-row p,
  .service-row .round-link {
    grid-column: 2;
  }

  .round-link {
    width: 46px;
    height: 46px;
  }

  .product-panel {
    min-height: 520px;
    padding: 30px 24px;
    border-radius: 4px 4px 46px 4px;
  }

  .dual-core-card {
    min-height: auto;
    padding: 30px 24px;
    border-radius: 4px 4px 40px 4px;
  }

  .dual-core-head {
    gap: 16px;
  }

  .dual-core-number {
    font-size: 36px;
  }

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

  .benefit-item {
    min-height: auto;
  }

  .product-panel-grid {
    grid-template-columns: 1fr;
    margin-top: 48px;
  }

  .process-item:last-child {
    grid-column: auto;
  }

  .case-card {
    min-height: 460px;
    padding: 28px;
  }

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

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }

  .blue-band-grid,
  .module-grid {
    grid-template-columns: 1fr;
  }

  .blue-band-item,
  .module-card {
    min-height: auto;
  }

  .story-outcomes {
    grid-template-columns: 1fr;
  }

  .capability-card {
    min-height: auto;
  }

  .contact-card {
    padding: 34px 24px;
  }

  .error-title {
    font-size: clamp(38px, 10.5vw, 42px);
  }

  .error-description {
    font-size: 16px;
  }

  .error-visual {
    min-height: 430px;
    border-radius: 4px 4px 52px 4px;
  }

  .error-code {
    bottom: 44px;
    font-size: 78px;
  }

  .error-route {
    right: 24px;
    bottom: 28px;
  }

  .demo-controls {
    margin-top: 40px;
    padding: 14px;
  }

  .demo-filters {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .demo-filter {
    width: 100%;
  }

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

  .demo-stat {
    min-height: 108px;
    padding: 20px;
  }

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

  .demo-card {
    min-height: 224px;
    padding: 20px;
  }

  .demo-pagination {
    align-items: stretch;
    flex-direction: column;
  }

  .demo-pagination-controls {
    justify-content: space-between;
  }

  .demo-pagination-pages {
    justify-content: center;
  }
}

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

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

  .js .reveal {
    opacity: 1;
    transform: none;
  }

  .typewriter-cursor {
    display: none;
  }
}

.demo-card-stack {
  position: relative;
  z-index: 0;
}

.demo-card-stack::before,
.demo-card-stack::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border: 1px solid rgba(47, 111, 178, 0.14);
  border-radius: 18px;
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.82),
    rgba(237, 245, 253, 0.76)
  );
  transition: transform 200ms ease;
}

.demo-card-stack::before {
  transform: rotate(1.6deg) translateY(5px);
}

.demo-card-stack::after {
  transform: rotate(-1.3deg) translateY(10px);
  opacity: 0.72;
}

.demo-card-stack:hover::before {
  transform: rotate(2.2deg) translateY(7px);
}

.demo-card-stack:hover::after {
  transform: rotate(-1.9deg) translateY(13px);
}

.demo-version-switch {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--brand-100);
  border-radius: 999px;
}

.demo-version-switch button {
  padding: 5px 12px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition:
    background-color 160ms ease,
    color 160ms ease;
}

.demo-version-switch button.is-active {
  background: var(--brand-600);
  color: #fff;
}

.demo-version-switch button:focus-visible {
  outline: 2px solid var(--brand-600);
  outline-offset: 2px;
}

.demo-version-badge {
  display: inline-block;
  margin-left: 4px;
  padding: 2px 10px;
  border-radius: 999px;
  background: rgba(47, 111, 178, 0.1);
  color: var(--brand-600);
  font-size: 11px;
  font-weight: 600;
  vertical-align: 2px;
}

.demo-version-badge.is-switched {
  animation: demo-version-pop 620ms cubic-bezier(0.22, 1, 0.36, 1);
}

.demo-card-stack [data-version-panel]:not([hidden]),
.demo-card-stack .demo-card-footer a:not([hidden]) {
  animation: demo-version-in 560ms cubic-bezier(0.22, 1, 0.36, 1);
}

.demo-card-stack .demo-card-footer a:not([hidden]) {
  animation-name: demo-version-in-soft;
  animation-duration: 560ms;
  animation-timing-function: ease;
}

@keyframes demo-version-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes demo-version-in-soft {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes demo-version-pop {
  0% {
    transform: scale(0.82);
    opacity: 0.4;
  }
  60% {
    transform: scale(1.08);
    opacity: 1;
  }
  100% {
    transform: scale(1);
  }
}