:root {
  --blue: #1677ff;
  --blue-hover: #1565e8;
  --blue-text: #0f63d8;
  --ink: #111820;
  --muted: #667085;
  --muted-alt: #667681;
  --line: #e4e7ec;
  --surface: #f7f9fb;
  --footer: #101419;
  --white: #ffffff;
  --content-width: 1280px;
  --page-gutter: max(80px, calc((100% - var(--content-width)) / 2));
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Inter", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.menu-open {
  overflow: hidden;
}

button,
a {
  font: inherit;
}

button {
  padding: 0;
  border: 0;
  cursor: pointer;
}

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

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

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

svg {
  display: block;
}

.hero {
  position: relative;
  width: 100%;
  height: 820px;
  overflow: hidden;
  touch-action: pan-y;
  color: var(--white);
  background: #0a0e14;
}

.hero-backgrounds,
.hero-background,
.hero-shade,
.hero-cursor-glow,
.hero-static-glow {
  position: absolute;
  inset: 0;
}

.hero-background {
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 700ms ease;
}

.hero-background.is-active {
  opacity: 1;
}

.hero-shade {
  background: linear-gradient(180deg, rgba(10, 14, 20, 0.08) 0%, rgba(10, 14, 20, 0.28) 55%, rgba(10, 14, 20, 0.55) 100%);
}

.hero-cursor-glow {
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(
    700px circle at var(--glow-x, 50%) var(--glow-y, 50%),
    rgba(22, 119, 255, 0.16),
    transparent 60%
  );
  transition: background 150ms ease;
}

.hero-static-glow {
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(800px circle at 50% -10%, rgba(22, 119, 255, 0.08), transparent 70%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  width: 100%;
  height: 100%;
  padding: 0 var(--page-gutter);
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.button {
  position: relative;
  display: inline-flex;
  min-height: 46px;
  padding: 12px 24px;
  overflow: hidden;
  border-radius: 100px;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  transition:
    background-color 200ms ease,
    border-color 200ms ease,
    box-shadow 200ms ease,
    transform 140ms var(--ease-out);
}

.button:active {
  transform: scale(0.97);
}

.button-primary {
  background: var(--blue);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--blue-hover);
}

.button-outline {
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: transparent;
  font-weight: 500;
}

.button-outline:hover,
.button-outline:focus-visible {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

.button-shimmer::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: translateX(-120%) skewX(-20deg);
}

.button-shimmer:hover::after,
.button-shimmer:active::after {
  animation: button-shimmer 650ms ease forwards;
}

.hero-copy {
  display: flex;
  width: min(760px, 100%);
  padding: 0 2px;
  flex-direction: column;
  gap: 24px;
  align-items: center;
  text-align: center;
  text-shadow: 0 2px 12px rgba(10, 14, 20, 0.45);
}

.eyebrow {
  color: var(--blue);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.56px;
}

.hero-copy h1 {
  margin: 0;
  max-width: 100%;
  color: var(--white);
  font-size: 38px;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hero-copy p {
  margin: 0;
  max-width: 620px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 16px;
  line-height: 1.6;
}

.hero-copy .button {
  margin-top: 12px;
  padding-right: 28px;
  padding-left: 28px;
  letter-spacing: 0.5px;
}

.hero-controls {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 3;
  display: flex;
  width: 100%;
  padding: 24px var(--page-gutter) 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
  box-sizing: border-box;
}

.hero-progress-row {
  display: flex;
  width: 100%;
  gap: 12px;
  align-items: center;
}

.hero-progress-track {
  position: relative;
  width: auto;
  padding: 0;
  display: block;
  min-height: 44px;
  overflow: visible;
  border: 0;
  flex: 1 1 auto;
  appearance: none;
  background: transparent;
  cursor: pointer;
}

.hero-progress-track::before {
  position: absolute;
  top: 21px;
  right: 0;
  left: 0;
  height: 2px;
  border-radius: 1px;
  content: "";
  background: rgba(255, 255, 255, 0.1);
}

.hero-progress-track:focus-visible {
  outline-color: var(--white);
  outline-offset: 2px;
}

.hero-progress-fill {
  position: absolute;
  top: 21px;
  right: 0;
  left: 0;
  display: block;
  height: 2px;
  border-radius: 1px;
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: left center;
}

.hero-progress-fill.is-running {
  animation: hero-progress 5s linear forwards;
}

.round-controls {
  display: flex;
  gap: 12px;
  align-items: center;
}

.round-button {
  display: grid;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 50%;
  flex: 0 0 auto;
  place-items: center;
  color: var(--ink);
  background: var(--white);
  transition:
    border-color 200ms ease,
    background-color 200ms ease,
    box-shadow 200ms ease,
    transform 140ms var(--ease-out);
}

.round-button svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 2;
}

.round-button:hover,
.round-button:focus-visible {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(22, 119, 255, 0.08);
}

.round-button:active {
  transform: scale(0.97);
}

.round-button-light {
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--white);
  background: transparent;
}

.round-button-light:hover,
.round-button-light:focus-visible {
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: none;
}

.hero-labels {
  display: flex;
  gap: 40px;
  align-items: center;
}

.hero-label {
  display: inline-flex;
  min-width: 44px;
  min-height: 44px;
  padding: 0 4px;
  gap: 12px;
  align-items: center;
  color: rgba(255, 255, 255, 0.4);
  background: transparent;
  font-size: 13px;
  opacity: 1;
  transition: color 300ms ease, opacity 300ms ease;
}

.hero-label span,
.hero-label strong {
  font-size: inherit;
  font-weight: 600;
}

.hero-label strong {
  font-weight: 500;
}

.hero-label:hover {
  color: rgba(255, 255, 255, 0.65);
}

.hero-label.is-active {
  color: var(--white);
}

.hero-label.is-active span {
  color: var(--blue);
}

.section {
  display: flex;
  width: 100%;
  padding: 96px var(--page-gutter);
  flex-direction: column;
  gap: 64px;
  align-items: flex-start;
}

.section-white {
  background: var(--white);
}

.section-products {
  overflow: hidden;
}

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

.section-heading {
  display: flex;
  width: 100%;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
}

.section .eyebrow {
  color: var(--blue-text);
}

.section-heading h2 {
  margin: 0;
  color: var(--ink);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.2;
}

.section-heading p {
  width: min(672px, 100%);
  margin: 0;
  color: var(--muted-alt);
  font-size: 16px;
  line-height: 1.6;
}

.product-stage {
  display: flex;
  width: 100%;
  gap: 32px;
  align-items: center;
  justify-content: center;
  touch-action: pan-y;
}

.product-card,
.product-mobile-card {
  position: relative;
  display: flex;
  overflow: hidden;
  border-radius: 24px;
  flex: 0 0 auto;
  align-items: flex-end;
  color: var(--white);
  background: #d8dde2;
  text-align: left;
  transform: translateZ(0);
  backface-visibility: hidden;
  will-change: transform, opacity;
  transition:
    box-shadow 500ms ease,
    transform 500ms ease,
    opacity 300ms ease;
}

.product-card-side {
  width: 360px;
  height: 400px;
  padding: 32px;
}

.product-card-main {
  width: 440px;
  height: 480px;
  padding: 40px;
  box-shadow: 0 24px 48px rgba(17, 24, 32, 0.12);
}

.product-card img,
.product-mobile-card img {
  position: absolute;
  inset: 0;
  height: 100%;
  object-fit: cover;
  transition: transform 700ms ease;
}

.product-card-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.55));
  transition: background .3s ease;
}
/* 两侧卡加深遮罩 → 视觉退后，突出中心 */
.product-card-side .product-card-shade {
  background: linear-gradient(180deg, rgba(10, 14, 20, 0.35), rgba(10, 14, 20, 0.72));
}
.product-card-side { opacity: 0.82; }
.product-card-side:hover { opacity: 1; }
.product-card-side .product-card-copy { opacity: 0.85; }
/* 中心卡遮罩更浅 → 图片更清晰 */
.product-card-main .product-card-shade {
  background: linear-gradient(180deg, transparent, rgba(10, 14, 20, 0.32));
}
.product-card-main {
  z-index: 2;
}

.product-card:focus-visible {
  z-index: 2;
  box-shadow: 0 24px 48px rgba(22, 119, 255, 0.18);
}

.product-card:hover {
  z-index: 2;
  box-shadow: 0 24px 48px rgba(22, 119, 255, 0.18);
  transform: scale(1.015);
}

.product-card:hover img {
  transform: scale(1.04);
}

.product-card::after {
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  border-radius: 24px;
  content: "";
  pointer-events: none;
  transition: border-color 300ms ease;
}

.product-card:hover::after,
.product-card:focus-visible::after {
  border-color: rgba(22, 119, 255, 0.4);
}

.product-card-copy {
  position: relative;
  z-index: 3;
  display: flex;
  width: 100%;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  white-space: normal;
}

.product-card-copy strong {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
}

.product-card-main .product-card-copy strong {
  font-size: 24px;
}

.product-card-copy > span {
  font-size: 14px;
  font-weight: 600;
  opacity: 0.8;
  transition: opacity 300ms ease, transform 300ms ease;
}

.product-card:hover .product-card-copy > span {
  opacity: 1;
  transform: translateX(4px);
}

.spotlight {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(
    280px circle at var(--spot-x, 50%) var(--spot-y, 50%),
    rgba(22, 119, 255, 0.1),
    transparent 70%
  );
  transition: opacity 300ms ease;
}

.product-card .spotlight {
  background: radial-gradient(
    240px circle at var(--spot-x, 50%) var(--spot-y, 50%),
    rgba(22, 119, 255, 0.22),
    transparent 65%
  );
}

.spotlight-card:hover .spotlight,
.spotlight-card:focus-within .spotlight,
.product-card:hover .spotlight,
.product-card:focus-visible .spotlight {
  opacity: 1;
}

.product-mobile-card {
  display: none;
  touch-action: pan-y;
}

.product-navigation {
  display: flex;
  width: 100%;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.product-pills {
  display: flex;
  min-width: 0;
  padding: 1px;
  overflow-x: auto;
  flex: 1 1 auto;
  gap: 8px;
  align-items: center;
  justify-content: center;
}

.product-pills button {
  min-height: 44px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 100px;
  flex: 0 0 auto;
  color: var(--ink);
  background: var(--white);
  font-size: 13px;
  font-weight: 500;
  white-space: normal;
  transition:
    border-color 200ms ease,
    color 200ms ease,
    background-color 200ms ease,
    box-shadow 200ms ease;
}

.product-pills button:hover,
.product-pills button:focus-visible {
  border-color: var(--blue);
  color: var(--blue);
  box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.08);
}

.product-pills button.is-active {
  border-color: var(--blue);
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
}

.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.no-scrollbar::-webkit-scrollbar {
  display: none;
}

.solutions-layout {
  display: flex;
  width: 100%;
  gap: 32px;
  align-items: stretch;
}

.solution-media {
  position: relative;
  width: min(733px, 58%);
  height: 520px;
  overflow: hidden;
  border-radius: 32px;
  flex: 0 0 auto;
  background: #e9edf2;
  box-shadow: 0 16px 32px rgba(17, 24, 32, 0.05);
}

.solution-media img {
  position: absolute;
  inset: 0;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.02);
  transition:
    opacity 250ms var(--ease-in-out),
    transform 250ms var(--ease-in-out);
}

.solution-media img.is-active {
  opacity: 1;
  transform: scale(1);
}

.solution-media:hover img.is-active {
  transform: scale(1.02);
}

.solution-list {
  display: flex;
  min-width: 0;
  flex: 1 1 auto;
  flex-direction: column;
  gap: 12px;
  justify-content: space-between;
  align-items: stretch;
}

.solution-item {
  position: relative;
  display: flex;
  width: 100%;
  min-height: 68px;
  padding: 14px 18px;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
  color: var(--ink);
  background: #fafbfc;
  text-align: left;
  transition:
    border-color 200ms ease,
    background-color 200ms ease,
    box-shadow 200ms ease;
}

.solution-item::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -1px;
  width: 3px;
  border-radius: 12px 0 0 12px;
  content: "";
  background: transparent;
  transition: background-color 300ms ease;
}

.solution-item > span:first-child {
  display: flex;
  min-width: 0;
  flex: 1 1 auto;
  flex-direction: column;
  gap: 4px;
}

.solution-item strong {
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  transition: color 200ms ease;
}

.solution-item small {
  color: var(--muted);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.6;
}

.solution-action {
  display: inline-flex;
  flex: 0 0 auto;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  text-decoration: none;
  cursor: pointer;
}

.solution-action b {
  display: none;
  font-size: 13px;
  font-weight: 600;
  white-space: normal;
}

.solution-action svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 2;
}

.solution-item:hover,
.solution-item:focus-visible {
  border-color: rgba(22, 119, 255, 0.3);
  background: var(--white);
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.07);
}

.solution-item:hover::before,
.solution-item:focus-visible::before {
  background: rgba(22, 119, 255, 0.3);
}

.solution-item:hover strong,
.solution-item:focus-visible strong {
  color: var(--blue);
}

.solution-item.is-active {
  background: var(--white);
  box-shadow: 0 1px 3px rgba(17, 24, 32, 0.06);
}

.solution-item.is-active::before {
  background: var(--blue);
}

.solution-item.is-active .solution-action {
  color: var(--blue);
}

.solution-item.is-active .solution-action b {
  display: block;
}

.technology-grid {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.technology-card {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  background: var(--white);
  box-shadow:
    0 24px 24px rgba(0, 0, 0, 0.03),
    0 8px 12px rgba(0, 0, 0, 0.06),
    0 2px 2px rgba(0, 0, 0, 0.04);
  transition: box-shadow 300ms ease, transform 300ms ease;
}

.technology-card:hover {
  box-shadow: 0 16px 48px rgba(22, 119, 255, 0.12);
  transform: translateY(-4px);
}

.technology-image {
  width: 100%;
  height: 220px;
  overflow: hidden;
}

.technology-image img {
  height: 100%;
  object-fit: cover;
  transition: transform 700ms ease;
}

.technology-card:hover .technology-image img {
  transform: scale(1.03);
}

.technology-content {
  position: relative;
  z-index: 3;
  display: flex;
  padding: 40px;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}

.technology-icon {
  display: grid;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  place-items: center;
  color: var(--blue);
  background: #dbeafe;
  transition: background-color 300ms ease;
}

.technology-card:hover .technology-icon {
  background: rgba(22, 119, 255, 0.2);
}

.technology-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 2;
}

.technology-content h3 {
  margin: 0;
  color: var(--ink);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
}

.technology-content p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.text-link {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--blue);
  font-size: 14px;
  font-weight: 600;
}

.text-link span {
  transition: transform 200ms ease;
}

.text-link:hover span {
  transform: translateX(4px);
}

.cases-heading {
  display: flex;
  width: 100%;
  gap: 32px;
  align-items: flex-end;
  justify-content: space-between;
}

.section-heading-left {
  min-width: 0;
  flex: 1 1 auto;
  align-items: flex-start;
  text-align: left;
}

.section-heading-left p {
  margin-right: auto;
}

.cases-all {
  flex: 0 0 auto;
}

.case-grid {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.case-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.case-image {
  position: relative;
  width: 100%;
  height: 360px;
  margin-bottom: 12px;
  overflow: hidden;
  border-radius: 20px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  transition: box-shadow 400ms ease, transform 180ms ease;
}

.case-image img {
  height: 100%;
  object-fit: cover;
  transition: transform 700ms ease;
}

.case-view-btn {
  position: absolute;
  bottom: 14px;
  left: 14px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: #ffffff;
  border: 1px solid rgba(17, 24, 32, 0.08);
  border-radius: 8px;
  color: #111820;
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(17, 24, 32, 0.12);
  transition: color 200ms ease, box-shadow 200ms ease, transform 200ms ease;
}

.case-view-btn:hover {
  color: var(--blue);
  box-shadow: 0 4px 14px rgba(22, 119, 255, 0.22);
  transform: translateY(-1px);
}

.case-view-btn svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 2;
}

.case-card:hover .case-image {
  box-shadow: 0 16px 40px rgba(22, 119, 255, 0.14);
}

.case-card:hover .case-image img {
  transform: scale(1.05);
}

.case-card > span {
  color: var(--blue);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.96px;
}

.case-card h3 {
  margin: 0;
  overflow: hidden;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  text-overflow: ellipsis;
  transition: color 200ms ease;
}

.case-card:hover h3 {
  color: var(--blue);
}

.section-partners {
  gap: 48px;
  align-items: center;
}

.section-partners .section-heading {
  width: min(800px, 100%);
}

.partner-grid {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.partner-grid .partner-card:nth-child(n+9) {
  display: none;
}

.partner-card {
  display: flex;
  height: 132px;
  padding: 24px;
  border: 1px solid #eef1f5;
  border-radius: 8px;
  flex-direction: row;
  gap: 0;
  align-items: center;
  justify-content: center;
  background: #fff;
  transition:
    background-color 250ms ease,
    box-shadow 250ms ease,
    transform 250ms ease;
}
.partner-card img {
  max-width: 100%;
  max-height: 84px;
  width: auto;
  height: auto;
  object-fit: contain;
}

/* 蓝色圆点已移除（合作伙伴区只显示 logo 图片） */

.partner-card h3 {
  margin: 0;
  color: #40454d;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
}

.partner-card:hover {
  box-shadow: 0 24px 48px rgba(22, 119, 255, 0.14);
  transform: translateY(-2px);
}

.partner-card:hover > span {
  transform: scale(1.1);
}

.partner-cta {
  position: relative;
  display: inline-flex;
  padding: 12px 24px;
  overflow: hidden;
  border: 1px solid var(--blue);
  border-radius: 100px;
  color: var(--white);
  background: var(--blue);
  font-size: 15px;
  font-weight: 600;
  transition:
    border-color 200ms ease,
    background-color 200ms ease,
    box-shadow 200ms ease,
    transform 150ms ease;
}

.partner-cta:hover,
.partner-cta:focus-visible {
  border-color: var(--blue-hover);
  color: var(--white);
  background: var(--blue-hover);
  box-shadow: 0 0 0 4px rgba(22, 119, 255, 0.14);
}

.section-why {
  gap: 80px;
}

.why-top {
  display: flex;
  width: 100%;
  flex-direction: column;
  gap: 32px;
  align-items: center;
}

.why-card {
  position: relative;
  display: flex;
  width: 100%;
  padding: 40px;
  overflow: hidden;
  border-radius: 24px;
  flex-direction: column;
  gap: 24px;
  background: var(--white);
  box-shadow: 0 16px 32px rgba(22, 119, 255, 0.04);
  transition: box-shadow 400ms ease;
}

.why-card:hover {
  box-shadow: 0 16px 48px rgba(22, 119, 255, 0.09);
}

.why-card .spotlight {
  background: radial-gradient(
    400px circle at var(--spot-x, 50%) var(--spot-y, 50%),
    rgba(22, 119, 255, 0.07),
    transparent 70%
  );
}

.why-tabs {
  position: relative;
  z-index: 3;
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.why-tabs button {
  display: inline-flex;
  min-height: 44px;
  padding: 6px 0;
  gap: 6px;
  align-items: center;
  color: var(--muted);
  background: transparent;
  font-size: 14px;
  font-weight: 500;
  transition: color 150ms ease, opacity 150ms ease;
}

.why-tabs button:hover,
.why-tabs button:focus-visible {
  color: var(--ink);
  opacity: 0.8;
}

.why-tabs button > span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--line);
}

.why-tabs button.is-active {
  color: var(--ink);
  font-weight: 700;
}

.why-tabs button.is-active > span {
  background: var(--blue);
}

.why-divider {
  position: relative;
  z-index: 3;
  width: 100%;
  height: 1px;
  background: var(--line);
}

.why-content {
  position: relative;
  z-index: 3;
  display: flex;
  width: 100%;
  gap: 24px;
  align-items: flex-start;
}

.why-copy {
  display: flex;
  width: 480px;
  flex: 0 0 auto;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.why-copy h3 {
  margin: 0;
  color: var(--ink);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
}

.why-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.why-image {
  position: relative;
  height: 220px;
  min-width: 0;
  overflow: hidden;
  border-radius: 16px;
  flex: 1 1 auto;
}

.why-image img {
  height: 100%;
  object-fit: cover;
  transition: opacity 250ms ease, transform 700ms ease;
}

.why-image > span {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.18);
}

.why-image:hover img {
  transform: scale(1.03);
}

.stats-pyramid {
  display: flex;
  width: 100%;
  flex-direction: column;
  gap: 16px;
  align-items: center;
}

.stats-row {
  display: flex;
  overflow: hidden;
  border-radius: 16px;
  align-items: center;
  background: var(--white);
  box-shadow: 0 12px 24px rgba(17, 24, 32, 0.02);
}

.stats-row-top {
  width: min(720px, 100%);
}

.stats-row-bottom {
  width: min(480px, 66.666%);
}

.stat {
  display: flex;
  min-width: 120px;
  height: 100px;
  border-left: 1px solid var(--line);
  flex: 1 1 0;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  justify-content: center;
  transition: background-color 200ms ease;
}

.stat:first-child {
  border-left: 0;
}

.stat:hover {
  background: #f0f6ff;
}

.stat strong {
  color: var(--blue);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0;
}

.stat span {
  padding: 0 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  text-align: center;
  text-transform: uppercase;
}

.about-link {
  width: 100%;
  justify-content: center;
}

.contact-section {
  position: relative;
  display: flex;
  width: 100%;
  padding: 80px var(--page-gutter) 48px;
  overflow: hidden;
  align-items: center;
  justify-content: center;
  background: var(--footer);
}

.section-cursor-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    500px circle at var(--glow-x, 50%) var(--glow-y, 50%),
    rgba(22, 119, 255, 0.12),
    transparent 60%
  );
  transition: background 150ms ease;
}

.cta-card {
  position: relative;
  z-index: 2;
  display: flex;
  width: 100%;
  padding: 56px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  flex-direction: column;
  gap: 32px;
  align-items: center;
  background-color: #151b23;
  background-image: url("../assets/images/cta-bg.webp");
  background-size: cover;
  background-position: center;
  transition: border-color 500ms ease;
}

.cta-card::before {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background: rgba(12, 16, 22, 0.72);
}

.cta-card::after {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(600px circle at 50% 50%, rgba(22, 119, 255, 0.06), transparent 70%);
  transition: opacity 500ms ease;
}

.cta-card:hover {
  border-color: rgba(22, 119, 255, 0.2);
}

.cta-card:hover::after {
  opacity: 1;
}

.cta-card > * {
  position: relative;
  z-index: 2;
}

.cta-card h2 {
  margin: 0;
  color: var(--white);
  font-size: 28px;
  line-height: 1.1;
}

.cta-card p {
  max-width: 576px;
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 16px;
  line-height: 1.6;
  text-align: center;
}

.cta-card .button {
  box-shadow: 0 4px 20px rgba(22, 119, 255, 0.4);
}

.cta-card .button:hover {
  box-shadow: 0 8px 32px rgba(22, 119, 255, 0.55);
}

.social-links {
  display: flex;
  gap: 16px;
  align-items: center;
}

.social-links a {
  display: grid;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  place-items: center;
  color: rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.12);
  font-size: 12px;
  font-weight: 500;
  transition:
    border-color 200ms ease,
    background-color 200ms ease,
    transform 200ms ease;
}

.social-links a:focus-visible {
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.2);
}

.social-links a:hover {
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.play-icon {
  width: 0;
  height: 0;
  margin-left: 2px;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 6px solid currentColor;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
}

.reveal.is-visible {
  animation: fade-up 650ms cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: var(--reveal-delay, 0ms);
}

@keyframes hero-progress {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes button-shimmer {
  from {
    transform: translateX(-120%) skewX(-20deg);
  }
  to {
    transform: translateX(220%) skewX(-20deg);
  }
}

@media (max-width: 1439px) {
  .product-stage {
    gap: 24px;
  }

  .product-card-side {
    width: 300px;
    height: 360px;
  }

  .product-card-main {
    width: 390px;
    height: 440px;
  }

  .solution-media {
    width: 56%;
  }
}

@media (max-width: 1199px) {
  .hero {
    height: 680px;
  }

  .hero-inner {
    padding-right: 32px;
    padding-bottom: 40px;
    padding-left: 32px;
  }

  .section {
    padding: 80px 32px;
    gap: 48px;
  }

  .product-stage {
    display: none;
  }

  .product-mobile-card {
    display: flex;
    width: min(440px, 100%);
    height: 420px;
    padding: 32px;
    align-self: center;
    box-shadow: 0 24px 48px rgba(17, 24, 32, 0.12);
  }

  .product-mobile-card .product-card-copy strong {
    font-size: 22px;
  }

  .product-pills {
    justify-content: flex-start;
  }

  .solutions-layout {
    flex-direction: column;
  }

  .solution-media {
    width: 100%;
    height: 320px;
    border-radius: 20px;
  }

  .solution-list {
    width: 100%;
  }

  .technology-content {
    padding: 32px;
  }

  .case-image {
    height: 280px;
  }

  .section-why {
    gap: 64px;
  }

  .contact-section {
    padding: 72px 32px 48px;
  }
}

@media (max-width: 767px) {
  .hero-copy h1 {
    font-size: 34px;
  }

  .hero-labels {
    gap: 16px;
  }

  .hero-label {
    gap: 8px;
  }

  .hero-label strong {
    display: none;
  }

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

  .case-image {
    height: 260px;
    border-radius: 16px;
  }

  .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .why-content {
    flex-direction: column;
  }

  .why-copy {
    width: 100%;
  }

  .why-image {
    width: 100%;
    flex-basis: auto;
  }

  .stats-row-bottom {
    width: min(480px, 100%);
  }
}

@media (max-width: 639px) {
  .hero {
    height: 580px;
  }

  .hero-inner {
    padding-right: 16px;
    padding-bottom: 32px;
    padding-left: 16px;
  }

  .hero-copy {
    gap: 16px;
  }

  .hero-copy .eyebrow {
    font-size: 12px;
  }

  .hero-copy h1 {
    font-size: 26px;
  }

  .hero-copy p {
    font-size: 14px;
  }

  .hero-copy .button {
    min-height: 42px;
    margin-top: 4px;
    padding: 11px 24px;
    font-size: 13px;
  }

  .hero-controls {
    padding-top: 20px;
  }

  .round-controls {
    gap: 8px;
  }

  .round-button {
    width: 44px;
    height: 44px;
  }

  .hero-labels {
    gap: 14px;
  }

  .section {
    padding: 64px 16px;
    gap: 40px;
  }

  .section-heading h2 {
    font-size: 24px;
  }

  .section-heading p {
    font-size: 15px;
  }

  .product-mobile-card {
    height: 360px;
  }

  .product-card-copy {
    white-space: normal;
  }

  .product-navigation {
    gap: 10px;
  }

  .solution-media {
    height: 240px;
  }

  .solution-item {
    padding: 12px 16px;
  }

  .solution-item strong {
    font-size: 15px;
  }

  .solution-item small {
    font-size: 12px;
  }

  .solution-action b {
    display: none;
  }

  .technology-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .technology-image {
    height: 180px;
  }

  .technology-content {
    padding: 24px;
    gap: 12px;
  }

  .technology-icon {
    width: 48px;
    height: 48px;
  }

  .technology-content h3 {
    font-size: 16px;
  }

  .cases-heading {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }

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

  .case-image {
    height: 200px;
    margin-bottom: 8px;
  }

  .case-card > span {
    font-size: 11px;
  }

  .case-card h3 {
    font-size: 13px;
  }

  .partner-card {
    height: 88px;
    padding: 14px 8px;
  }

  .partner-card > span {
    width: 20px;
    height: 20px;
  }

  .partner-card h3 {
    font-size: 12px;
  }

  .section-why {
    gap: 56px;
  }

  .why-card {
    padding: 24px;
    border-radius: 20px;
    gap: 20px;
  }

  .why-tabs {
    gap: 12px;
  }

  .why-tabs button {
    font-size: 13px;
  }

  .why-copy h3 {
    font-size: 18px;
  }

  .why-copy p {
    font-size: 13px;
  }

  .why-image {
    height: 180px;
  }

  .stats-row {
    width: 100%;
  }

  .stats-row-top {
    flex-wrap: wrap;
  }

  .stats-row-top .stat {
    flex-basis: 33.333%;
  }

  .stat {
    min-width: 0;
  }

  .stat strong {
    font-size: 22px;
  }

  .stat span {
    font-size: 11px;
  }

  .contact-section {
    padding: 56px 16px 40px;
  }

  .cta-card {
    padding: 32px;
    gap: 24px;
    border-radius: 16px;
  }

  .cta-card h2 {
    font-size: 24px;
  }

  .cta-card p {
    font-size: 15px;
  }

  .social-links {
    gap: 12px;
  }
}

@media (hover: none) {
  .product-card:hover,
  .technology-card:hover,
  .partner-card:hover {
    transform: none;
  }

  .product-card:hover img,
  .technology-card:hover .technology-image img,
  .case-card:hover .case-image img,
  .why-image:hover img {
    transform: none;
  }

  .product-card:hover .product-card-copy > span,
  .solution-media:hover img.is-active,
  .text-link:hover span,
  .partner-card:hover > span,
  .social-links a:hover {
    transform: none;
  }

  .product-mobile-card:active,
  .technology-card:active,
  .partner-card:active {
    transform: scale(0.97);
  }

  .solution-item:active {
    border-color: rgba(22, 119, 255, 0.45);
    background: var(--white);
  }

  .case-card:active .case-image {
    box-shadow: 0 10px 28px rgba(22, 119, 255, 0.14);
    transform: scale(0.99);
  }

  .why-tabs button:active,
  .text-link:active {
    opacity: 0.65;
  }
}

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

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

.button-primary,
.hero-copy .button-primary {
  min-height: 44px;
}

/* ─── 丝滑图片切换叠放层（滑动+淡入淡出，移植自 solutions solution-areas）── */
.home-switch-image {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: translate3d(3%, 0, 0) scale(1.02);
  transition: opacity .55s ease, transform .62s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform, opacity;
}
.home-switch-image.is-active { opacity: 1; transform: translate3d(0, 0, 0) scale(1); }
.home-switch-image.is-entering-next { transform: translate3d(3%, 0, 0) scale(1.02); }
.home-switch-image.is-entering-previous { transform: translate3d(-3%, 0, 0) scale(1.02); }
.home-switch-image.is-leaving-next { opacity: 0; transform: translate3d(-2%, 0, 0) scale(.985); }
.home-switch-image.is-leaving-previous { opacity: 0; transform: translate3d(2%, 0, 0) scale(.985); }
.why-image { position: relative; }