:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --ink: #101828;
  --muted: #667085;
  --line: #e4e7ec;
  --brand: #2f6dff;
  --brand-strong: #1f58d8;
  --accent: #0a63fd;
  --soft-blue: #eef4ff;
  --deep: #060914;
  --hero-muted: #8e8d8d;
  --shadow: 0 24px 80px rgba(16, 24, 40, 0.1);
  --radius: 8px;
  --header-height: 70px;
  color-scheme: light;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 16%, rgba(47, 109, 255, 0.1), transparent 28rem),
    linear-gradient(180deg, #fbfcff 0%, var(--bg) 46%, #ffffff 100%);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
}

body.menu-open {
  overflow: hidden;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

/* 导航栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: var(--header-height);
  padding: 0 44px;
  border-bottom: 1px solid rgba(228, 231, 236, 0.86);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

body.navigation-ready .site-header {
  transition:
    border-color 180ms ease,
    background 180ms ease,
    color 180ms ease;
}

.site-header.is-at-top {
  border-bottom-color: transparent;
  background: #000000;
  color: #ffffff;
}

body[data-page="about"] .site-header.is-at-top {
  border-bottom-color: transparent;
  background: #cfe5ff;
  color: #091221;
}

.brand {
  display: inline-flex;
  align-items: center;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-logo {
  display: block;
  width: 145px;
  height: auto;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 34px;
  color: #344054;
  font-size: 0.96rem;
  font-weight: 650;
}

.site-header.is-at-top .site-nav {
  color: #ffffff;
}

body[data-page="about"] .site-header.is-at-top .site-nav {
  color: #091221;
}

.site-nav a {
  position: relative;
  white-space: nowrap;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: -10px;
  left: 0;
  height: 2px;
  background: var(--brand);
  content: "";
  opacity: 0;
  transform: scaleX(0.4);
  transition: 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  opacity: 1;
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.language-switch {
  position: relative;
}

.language-button {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 50%;
  background: transparent;
  color: #344054;
  cursor: pointer;
}

.site-header.is-at-top .language-button {
  color: #ffffff;
}

body[data-page="about"] .site-header.is-at-top .language-button {
  color: #091221;
}

.language-button img {
  width: 18px;
  height: 18px;
  display: block;
  filter: brightness(0) saturate(100%) invert(19%) sepia(14%) saturate(1436%) hue-rotate(182deg) brightness(93%) contrast(89%);
  object-fit: contain;
}

.site-header.is-at-top .language-button img {
  filter: brightness(0) invert(1);
}

body[data-page="about"] .site-header.is-at-top .language-button img {
  filter: brightness(0) saturate(100%) invert(19%) sepia(14%) saturate(1436%) hue-rotate(182deg) brightness(93%) contrast(89%);
}

.language-current {
  display: none;
}

.language-options {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  display: none;
  min-width: 132px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 18px 45px rgba(16, 24, 40, 0.14);
}

.language-switch.open .language-options {
  display: grid;
}

.language-options button {
  min-height: 36px;
  padding: 0 12px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 750;
  text-align: left;
}

.language-options button.active {
  background: var(--soft-blue);
  color: var(--brand);
}

.language-options button:hover,
.language-options button:focus-visible {
  background: var(--brand);
  color: #ffffff;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 800;
  line-height: 1;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
  white-space: nowrap;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  border-radius: 999px;
  background: var(--brand);
  box-shadow: 0 12px 30px rgba(47, 109, 255, 0.24);
  color: #ffffff;
}

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

.button-ghost {
  border-color: rgba(16, 24, 40, 0.18);
  background: rgba(255, 255, 255, 0.76);
  color: var(--deep);
}

.button-light {
  background: #ffffff;
  color: var(--deep);
}

.contact-strip .button-light {
  border: 1px solid #eeeeee;
  border-radius: 8px;
  background: transparent;
  color: #ffffff;
  font-size: 1rem;
  font-weight: normal;
}

.menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  border-radius: 10px;
  background: var(--deep);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.site-header.is-at-top .menu-toggle {
  border-color: rgba(255, 255, 255, 0.22);
}

body[data-page="about"] .site-header.is-at-top .menu-toggle {
  border-color: rgba(16, 24, 40, 0.14);
}

/* 首屏品牌主张区 */
.hero {
  position: relative;
  display: grid;
  width: 100%;
  max-width: none;
  grid-template-columns: 1fr;
  align-content: start;
  margin: 0;
  gap: 56px;
  padding-right: max(24px, calc((100% - 1180px) / 2));
  padding-left: max(24px, calc((100% - 1180px) / 2));
  padding-top: 92px;
  padding-bottom: clamp(120px, 18vw, 220px);
  background: #000000;
  color: #ffffff;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  width: 100%;
  justify-items: center;
  text-align: center;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.12;
  letter-spacing: 0;
}

h1 {
  max-width: 780px;
  font-size: clamp(2.45rem, 6.2vw, 4.85rem);
}

.hero-title {
  max-width: 1060px;
  font-size: clamp(2.18rem, 5vw, 4.12rem);
  line-height: 1.22;
}

.hero-title-accent {
  color: var(--accent);
}

h2 {
  font-size: clamp(1.68rem, 3.1vw, 2.58rem);
  line-height: 1.56;
}

h3 {
  font-size: 1.22rem;
}

.hero-copy {
  max-width: 920px;
  margin: 34px 0 0;
  color: var(--hero-muted);
  font-size: 1rem;
  line-height: 1.92;
  white-space: pre-line;
}

.hero .eyebrow {
  margin: 24px 0 0;
  color: #ffffff;
  font-size: clamp(0.92rem, 1.55vw, 1.16rem);
  letter-spacing: 0;
  line-height: 1.28;
  text-transform: none;
}

.hero-stats {
  display: grid;
  width: min(920px, 100%);
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
  margin-top: 48px;
}

.hero-stat {
  display: grid;
  justify-items: center;
  gap: 8px;
  text-align: center;
}

.hero-stat-value {
  display: inline-flex;
  align-items: flex-start;
  background: linear-gradient(to bottom right, #57aaff 0%, #0058ff 100%);
  background-clip: text;
  color: transparent;
  font-size: clamp(1.18rem, 2vw, 1.72rem);
  line-height: 1.1;
  -webkit-background-clip: text;
}

.hero-stat-plus {
  margin-left: 1px;
  font-size: 0.7em;
  line-height: 1;
  transform: translateY(-0.16em);
}

.hero-stat > span {
  color: #ffffff;
  font-size: 1.06rem;
  line-height: 1.35;
}

.hero-title,
.hero .eyebrow,
.hero-copy,
.hero-stats {
  animation: hero-fade-up 760ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero .eyebrow {
  animation-delay: 90ms;
}

.hero-copy {
  animation-delay: 170ms;
}

.hero-stats {
  animation-delay: 260ms;
}

.site-header,
.site-header a,
.site-header button,
.hero,
.hero h1,
.hero .eyebrow,
.hero strong,
.hero span,
.hero p {
  font-weight: normal;
}

.hero-visual {
  position: absolute;
  z-index: 0;
  inset: 0;
  width: 100%;
  pointer-events: none;
  overflow: hidden;
}

.hero-visual video {
  position: absolute;
  bottom: clamp(-260px, -20vh, -180px);
  right: 0;
  left: 0;
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  background: #000000;
}

/* MEYOU 通讯产品与服务 */
.product-showcase {
  position: relative;
  width: 100%;
  padding: 72px 0 84px;
  background: url("images/product/product-bg.png") center top / cover no-repeat;
}

.product-showcase-inner {
  width: min(980px, calc(100% - 48px));
  margin: 0 auto;
}

.product-showcase h2 {
  margin: 0;
  color: #091221;
  font-size: clamp(1.32rem, 2.15vw, 1.92rem);
  font-weight: normal;
  line-height: 1.25;
  text-align: center;
}

.product-list {
  display: grid;
  gap: 35px;
  margin-top: 48px;
}

.product-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 390px);
  gap: 0;
  align-items: center;
}

.product-entry.is-reversed {
  grid-template-columns: minmax(280px, 390px) minmax(0, 1fr);
}

.product-entry.is-reversed .product-copy {
  order: 2;
}

.product-entry.is-reversed .product-image {
  order: 1;
}

.product-copy {
  padding: 0 48px;
}

.product-copy h3 {
  color: #091221;
  font-size: clamp(1.22rem, 1.9vw, 1.76rem);
  font-weight: normal;
}

.product-copy p {
  max-width: 560px;
  margin: 16px 0 0;
  color: #79859e;
  font-size: clamp(0.92rem, 1.25vw, 1.02rem);
  line-height: 1.86;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 24px;
  margin-top: 20px;
  color: #167eff;
  font-size: clamp(0.88rem, 1.1vw, 0.98rem);
  line-height: 1.4;
}

.product-tags span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.product-tags span::before {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.product-image {
  display: block;
  width: min(100%, 390px);
  justify-self: end;
}

.product-entry.is-reversed .product-image {
  justify-self: start;
}

.product-footnote {
  position: absolute;
  right: 24px;
  bottom: 34px;
  left: 24px;
  margin: 0;
  color: #79859e;
  font-size: 0.86rem;
  line-height: 1.7;
  text-align: center;
}

/* 行业场景定制方案 */
.scenario-showcase {
  width: 100%;
  padding: 70px 0 82px;
  background: url("images/service/service-bg.png") center center / cover no-repeat;
}

.scenario-showcase-inner {
  width: min(980px, calc(100% - 48px));
  margin: 0 auto;
}

.scenario-showcase h2 {
  margin: 0;
  color: #091221;
  font-size: clamp(1.32rem, 2.15vw, 1.92rem);
  font-weight: normal;
  line-height: 1.25;
  text-align: center;
}

.scenario-accordion {
  display: flex;
  align-items: stretch;
  gap: 12px;
  margin-top: 56px;
}

.scenario-accordion.is-measuring .scenario-panel,
.scenario-accordion.is-measuring .scenario-panel-content {
  transition: none;
}

/* 横向风琴：收起显示标题，展开显示蓝色蒙版和完整文案。 */
.scenario-panel {
  position: relative;
  flex: 0 0 auto;
  width: 164px;
  border-radius: 0;
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
  isolation: isolate;
  overflow: hidden;
  transition: width 360ms cubic-bezier(0.22, 1, 0.36, 1);
}

.scenario-panel:nth-child(1) {
  background-image: url("images/service/service-1.png");
}

.scenario-panel:nth-child(2) {
  background-image: url("images/service/service-2.png");
}

.scenario-panel:nth-child(3) {
  background-image: url("images/service/service-3.png");
}

.scenario-panel:nth-child(4) {
  background-image: url("images/service/service-4.png");
}

.scenario-panel::before {
  position: absolute;
  z-index: 1;
  inset: 0;
  background: linear-gradient(180deg, rgba(9, 18, 33, 0.04), rgba(9, 18, 33, 0.48));
  content: "";
  opacity: 1;
  transition: opacity 220ms ease;
}

.scenario-panel::after {
  position: absolute;
  z-index: 1;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 57, 242, 0.85) 0%, rgba(0, 57, 242, 0.4) 100%);
  content: "";
  opacity: 0;
  transition: opacity 220ms ease;
}

.scenario-panel.is-active {
  width: var(--scenario-expanded-width, calc(100% - 528px));
  box-shadow: 0 24px 70px rgba(0, 57, 242, 0.22);
}

.scenario-panel.is-active::after {
  opacity: 1;
}

.scenario-panel-button {
  position: absolute;
  z-index: 3;
  inset: 0;
  width: 100%;
  border: 0;
  background: transparent;
  color: #ffffff;
  cursor: pointer;
  font: inherit;
  text-align: left;
}

.scenario-panel-button:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.88);
  outline-offset: -6px;
}

.scenario-collapsed-title {
  position: absolute;
  right: 14px;
  bottom: 26px;
  left: 14px;
  color: #ffffff;
  font-size: clamp(0.86rem, 1.12vw, 1rem);
  line-height: 1.2;
  text-align: center;
}

.scenario-panel.is-active .scenario-collapsed-title {
  opacity: 0;
}

.scenario-panel-content {
  position: relative;
  z-index: 2;
  display: none;
  gap: 14px;
  width: var(--scenario-expanded-width, 100%);
  max-width: none;
  padding: 30px 34px 28px;
  color: #ffffff;
  pointer-events: none;
}

.scenario-panel.is-active .scenario-panel-content {
  display: grid;
}

.scenario-panel-content h3 {
  color: #ffffff;
  font-size: clamp(0.98rem, 1.38vw, 1.24rem);
  font-weight: normal;
}

.scenario-panel-content p {
  margin: 0;
  color: #ffffff;
  font-size: clamp(0.78rem, 0.98vw, 0.88rem);
  line-height: 1.78;
}

.scenario-client,
.scenario-tags {
  padding-top: 2px;
}

/* 头部互联网企业信赖的AI通信服务商 */
.trust-showcase {
  position: relative;
  width: 100%;
  padding: 72px 0 84px;
  background: url("images/trust/AI-bg.png") center center / cover no-repeat;
  overflow: hidden;
}

.trust-showcase-inner {
  width: min(1020px, calc(100% - 48px));
  margin: 0 auto;
}

.trust-showcase h2 {
  max-width: 820px;
  margin: 0 auto;
  color: #091221;
  font-size: clamp(1.32rem, 2.15vw, 1.92rem);
  font-weight: normal;
  line-height: 1.25;
  text-align: center;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-auto-rows: 1fr;
  gap: 18px;
  margin-top: 52px;
}

.trust-card {
  position: relative;
  height: 100%;
  min-height: 230px;
  padding: 22px 22px 20px;
  border: 0;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.45);
  overflow: hidden;
}

.trust-icon {
  position: relative;
  z-index: 1;
  display: block;
  width: 56px;
  height: 56px;
  margin-bottom: 8px;
  object-fit: contain;
}

.trust-card h3 {
  position: relative;
  z-index: 1;
  color: #091221;
  font-size: clamp(1.04rem, 1.32vw, 1.18rem);
  font-weight: normal;
  line-height: 1.35;
}

.trust-card p {
  position: relative;
  z-index: 1;
  margin: 14px 0 0;
  color: #79859e;
  font-size: clamp(0.88rem, 1vw, 0.96rem);
  line-height: 1.78;
}

.trust-decoration {
  position: absolute;
  right: 0;
  bottom: 0;
  z-index: 0;
  width: min(34%, 118px);
  max-height: 44%;
  opacity: 0.4;
  object-fit: contain;
  object-position: right bottom;
  pointer-events: none;
}

/* 从头部互联网到各行业，实战验证的增长方案 */
.growth-showcase {
  width: 100%;
  padding: 72px 0 84px;
  background: #ffffff;
}

.growth-showcase-inner {
  width: min(1020px, calc(100% - 48px));
  margin: 0 auto;
}

.growth-showcase h2 {
  max-width: 820px;
  margin: 0 auto;
  color: #091221;
  font-size: clamp(1.32rem, 2.15vw, 1.92rem);
  font-weight: normal;
  line-height: 1.25;
  text-align: center;
}

.growth-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 42px;
}

.growth-card {
  display: grid;
  grid-template-rows: auto 1fr;
  padding: 12px;
  border: 1px solid #e5e5e5;
  border-radius: 14px;
  background: #ffffff;
  overflow: hidden;
}

.growth-image {
  display: block;
  width: 100%;
  aspect-ratio: 716 / 302;
  border-radius: 10px;
  object-fit: cover;
}

.growth-card p {
  margin: 0;
  padding: 18px 10px 8px;
  color: #091221;
  font-size: clamp(0.92rem, 1.05vw, 1rem);
  line-height: 1.72;
}

.growth-ecosystem-heading {
  margin-top: 76px;
  text-align: center;
}

.growth-ecosystem-heading h2 {
  margin: 0 auto;
  color: #091221;
  font-size: clamp(1.32rem, 2.15vw, 1.92rem);
  font-weight: normal;
  line-height: 1.25;
  text-align: center;
}

.ecosystem-network {
  display: grid;
  gap: 18px;
  margin-top: 42px;
}

.ecosystem-main-grid,
.ecosystem-partner-grid {
  display: grid;
  gap: 14px;
}

.ecosystem-main-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.ecosystem-partner-grid {
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

.ecosystem-network img {
  display: block;
  width: 100%;
  min-width: 0;
  background: #ffffff;
  object-fit: contain;
}

.metric-band {
  display: grid;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 18px 55px rgba(16, 24, 40, 0.08);
}

.metric-band div {
  display: grid;
  gap: 4px;
  padding: 26px 32px;
  border-right: 1px solid var(--line);
}

.metric-band div:last-child {
  border-right: 0;
}

.metric-band strong {
  color: var(--deep);
  font-size: 1.32rem;
}

.metric-band span {
  color: var(--muted);
}

.content-section {
  scroll-margin-top: 0;
}

@keyframes hero-fade-up {
  from {
    opacity: 0;
    transform: translate3d(0, 22px, 0);
  }

  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

.product-entry,
.trust-card,
.growth-card,
.feature-card,
.story-grid article,
.principle-list div,
.ecosystem-network img {
  transition:
    transform 240ms ease,
    box-shadow 240ms ease,
    filter 240ms ease;
}

.growth-image,
.product-image,
.trust-icon {
  transition: transform 260ms ease;
}

body.reveal-ready .reveal-item {
  opacity: 0;
  filter: blur(4px);
  transform: translate3d(0, 18px, 0);
  transition:
    opacity 420ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 420ms cubic-bezier(0.22, 1, 0.36, 1),
    filter 420ms ease;
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform, filter;
}

body.reveal-ready .reveal-item.is-visible {
  opacity: 1;
  filter: blur(0);
  transform: var(--interactive-transform, translate3d(0, 0, 0));
}

@media (hover: hover) and (pointer: fine) {
  .product-entry:hover,
  .trust-card:hover,
  .growth-card:hover,
  .feature-card:hover,
  .story-grid article:hover {
    --interactive-transform: translate3d(0, -6px, 0);
  }

  .growth-card:hover,
  .feature-card:hover,
  .story-grid article:hover {
    box-shadow: 0 22px 58px rgba(16, 24, 40, 0.1);
  }

  .product-entry:hover .product-image,
  .growth-card:hover .growth-image,
  .trust-card:hover .trust-icon {
    transform: scale(1.035);
  }

  .ecosystem-network img:hover {
    --interactive-transform: translate3d(0, -3px, 0);
    filter: drop-shadow(0 12px 20px rgba(16, 24, 40, 0.1));
  }
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 44px;
  text-align: center;
}

.section-heading.align-left {
  margin-right: 0;
  margin-left: 0;
  text-align: left;
}

.section-heading p:not(.eyebrow) {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.04rem;
}

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

.feature-card {
  min-height: 290px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 18px 50px rgba(16, 24, 40, 0.07);
}

.feature-icon {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  margin-bottom: 34px;
  border-radius: 8px;
  background: var(--soft-blue);
  color: var(--brand);
  font-weight: 850;
}

.feature-card p,
.story-grid p {
  margin: 14px 0 0;
  color: var(--muted);
}

.muted-section {
  width: 100%;
  max-width: none;
  padding-right: max(24px, calc((100% - 1180px) / 2));
  padding-left: max(24px, calc((100% - 1180px) / 2));
  background: #f2f5fb;
}

.contact-strip {
  display: grid;
  justify-items: center;
  gap: 34px;
  width: 100%;
  margin-bottom: 0;
  padding: 66px 52px;
  border-radius: 0;
  background: url("images/contact/contact-bg.png") center center / cover no-repeat;
  color: #ffffff;
  text-align: center;
}

.contact-strip .eyebrow {
  color: #c9d8ff;
}

.contact-strip h2 {
  max-width: 760px;
  margin: 0;
  color: #ffffff;
  font-size: clamp(1.52rem, 3vw, 2.35rem);
  font-weight: normal;
  line-height: 1.25;
}

.product-showcase h2,
.scenario-showcase h2,
.trust-showcase h2,
.growth-showcase h2,
.growth-ecosystem-heading h2,
.contact-strip h2 {
  line-height: 1.56;
}

.contact-strip p:not(.eyebrow) {
  max-width: 720px;
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.78);
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(160px, 0.65fr) minmax(180px, 0.72fr) minmax(360px, 1.4fr);
  align-items: stretch;
  gap: 0;
  padding: 44px max(24px, calc((100% - 1180px) / 2));
  background: #010a17;
  color: #ffffff;
}

.footer-brand,
.footer-nav,
.footer-contact {
  min-width: 0;
}

.footer-nav,
.footer-contact {
  position: relative;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-right: 0;
}

.footer-brand img {
  display: block;
  width: auto;
  height: 26px;
}

.footer-nav::before,
.footer-contact::before {
  position: absolute;
  top: 50%;
  bottom: auto;
  left: 0;
  width: 1px;
  height: 82%;
  background: #a8a8a9;
  content: "";
  transform: translateY(-50%);
}

.footer-nav {
  display: grid;
  gap: 12px;
  align-content: center;
  justify-content: center;
  justify-items: start;
  padding: 0 34px;
}

.footer-nav a {
  color: #ffffff;
  font-size: 0.86rem;
  line-height: 1.4;
}

.footer-contact {
  display: grid;
  gap: 10px;
  align-content: center;
  padding-left: 78px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 0.82rem;
  line-height: 1.5;
}

.footer-contact-item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.footer-contact-item img {
  display: block;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  object-fit: contain;
}

.footer-contact-item a {
  color: inherit;
}

.footer-addresses {
  display: grid;
  gap: 5px;
}

.footer-addresses p {
  margin: 0;
}

.about-hero {
  position: relative;
  display: grid;
  width: 100%;
  max-width: none;
  min-height: clamp(300px, 30vw, 400px);
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: 40px;
  margin: 0;
  padding: 0 max(72px, calc((100% - 980px) / 2));
  background: url("images/about/about-bg.png") center bottom / cover no-repeat;
  overflow: hidden;
}

.about-hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  justify-self: start;
  justify-items: start;
}

html:lang(zh-CN) body[data-page="about"] .about-hero-content,
html:lang(zh-TW) body[data-page="about"] .about-hero-content {
  justify-self: center;
  justify-items: start;
  text-align: left;
}

.about-hero-brand {
  max-width: none;
  background: linear-gradient(135deg, #57aaff 0%, #0058ff 100%);
  background-clip: text;
  color: transparent;
  font-size: clamp(1.75rem, 3.35vw, 3.15rem);
  font-weight: 800;
  line-height: 0.95;
  -webkit-background-clip: text;
}

.about-hero-title {
  margin: 18px 0 0;
  color: #000000;
  font-size: clamp(1.12rem, 2vw, 1.84rem);
  line-height: 1.24;
}

.about-hero-rule {
  display: block;
  width: 24px;
  height: 6px;
  margin-top: 28px;
  border-radius: 3px;
  background: #000000;
}

.about-hero-subtitle {
  margin: 24px 0 0;
  color: #000000;
  font-size: clamp(1rem, 1.55vw, 1.28rem);
  line-height: 1.45;
}

.about-visual {
  position: relative;
  z-index: 1;
  justify-self: end;
  width: min(100%, 430px);
  /* margin-right: clamp(48px, 9vw, 128px); */
}

.about-visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}

.about-intro {
  width: 100%;
  padding: 70px 0 78px;
  background: url("images/about/about-bg-2.png") center center / cover no-repeat;
}

.about-intro-inner {
  display: grid;
  gap: 50px;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
}

.about-intro-heading {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 6px;
  text-align: center;
}

.about-intro h2 {
  position: relative;
  z-index: 1;
  color: #091221;
  font-size: clamp(1.48rem, 2.1vw, 2rem);
  font-weight: normal;
  line-height: 1.35;
}

.about-intro-heading::after {
  content: "ABOUT US";
  position: absolute;
  top: 50%;
  left: 50%;
  color: #f4f5f9;
  font-size: clamp(1.5rem, 4vw, 3.85rem);
  font-weight: 800;
  line-height: 0.9;
  pointer-events: none;
  transform: translate(-50%, -12%);
  user-select: none;
  white-space: nowrap;
}

.about-intro-copy {
  display: grid;
  gap: 18px;
  max-width: 980px;
  margin: 0 auto;
  color: #79859e;
  font-size: clamp(0.94rem, 1.08vw, 1rem);
  line-height: 1.92;
}

.about-intro-copy p {
  margin: 0;
}

.about-metrics {
  display: grid;
  width: min(920px, 100%);
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
  margin: 12px auto 0;
  color: #091221;
}

.about-metric {
  display: grid;
  justify-items: center;
  gap: 8px;
  text-align: center;
}

.about-metric strong {
  display: inline-flex;
  align-items: flex-start;
  color: #091221;
  font-size: clamp(1.18rem, 2vw, 1.72rem);
  font-weight: normal;
  line-height: 1.1;
}

.about-metric-plus {
  margin-left: 1px;
  font-size: 0.7em;
  line-height: 1;
  transform: translateY(-0.16em);
}

.about-metric > span {
  color: #091221;
  font-size: 1.16rem;
  line-height: 1.35;
}

.about-partners {
  display: grid;
  width: min(860px, 100%);
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 14px;
  margin: 28px auto 0;
}

.about-partners img {
  display: block;
  width: 100%;
  min-width: 0;
  box-shadow: 7px 7px 11px 2px rgba(202, 202, 202, 0.11);
  object-fit: contain;
}

.about-contact-section {
  width: 100%;
  padding: 70px 0 78px;
  background: #ffffff;
}

.about-contact-inner {
  display: grid;
  justify-items: center;
  gap: 8px;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  text-align: center;
}

.about-contact-inner h2 {
  color: #091221;
  font-size: clamp(1.48rem, 2.1vw, 2rem);
  font-weight: normal;
  line-height: 1.35;
}

.about-contact-subtitle {
  margin: 0;
  color: #79859e;
  font-size: clamp(0.94rem, 1.08vw, 1rem);
  line-height: 1.7;
}

.about-contact-list {
  display: grid;
  width: min(920px, 100%);
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 36px;
  margin-top: 46px;
}

.about-contact-item {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 36px;
  align-items: center;
  justify-items: start;
  min-width: 0;
  padding: 0;
  text-align: left;
}

.about-contact-content {
  display: grid;
  min-width: 0;
  justify-items: start;
}

.about-contact-item h3 {
  color: #091221;
  font-size: clamp(1.05rem, 1.25vw, 1.18rem);
  font-weight: normal;
  line-height: 1.35;
}

.about-contact-heading-icon {
  display: inline-grid;
  width: 68px;
  height: 68px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  background: #2465ff;
}

.about-contact-heading-icon img {
  display: block;
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.about-contact-item p,
.about-contact-item span,
.about-contact-item a {
  margin: 0;
  color: #79859e;
  font-size: 0.96rem;
  line-height: 1.6;
}

.about-contact-item p {
  margin-top: 4px;
}

.about-contact-item a {
  color: #2465ff;
}

.about-contact-detail {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 7px;
  color: #2465ff;
}

.about-contact-item .about-contact-detail {
  color: #2465ff;
  margin-top: 18px;
}

.about-contact-item .about-contact-detail span {
  color: inherit;
  font: inherit;
}

.about-contact-detail img {
  display: block;
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
  object-fit: contain;
}

.about-story {
  padding-top: 40px;
}

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

.story-grid article {
  min-height: 220px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 16px 45px rgba(16, 24, 40, 0.06);
}

.principle-list {
  display: grid;
  gap: 14px;
  max-width: 920px;
  margin: 0 auto;
}

.principle-list div {
  display: grid;
  grid-template-columns: minmax(180px, 0.32fr) 1fr;
  gap: 24px;
  align-items: center;
  padding: 22px 26px;
  border: 1px solid rgba(16, 24, 40, 0.1);
  border-radius: 8px;
  background: #ffffff;
}

.principle-list strong {
  color: var(--deep);
  font-size: 1.08rem;
}

.principle-list span {
  color: var(--muted);
}

@media (max-width: 1080px) {
  .site-header {
    padding: 0 24px;
  }

  .site-nav {
    gap: 18px;
  }

  .product-copy {
    padding: 0 24px;
  }

  .scenario-showcase {
    padding: 56px 0 68px;
  }

  .scenario-showcase-inner {
    width: min(100% - 34px, 980px);
  }

  .trust-showcase {
    padding: 56px 0 68px;
  }

  .trust-showcase-inner {
    width: min(100% - 34px, 1020px);
  }

  .trust-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 42px;
  }

  .growth-showcase {
    padding: 56px 0 68px;
  }

  .growth-showcase-inner {
    width: min(100% - 34px, 1020px);
  }

  .growth-ecosystem-heading {
    margin-top: 56px;
  }

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

@media (max-width: 900px) {
  .scenario-accordion {
    display: grid;
    gap: 12px;
    height: auto !important;
    margin-top: 30px;
    overflow: visible;
  }

  .scenario-panel,
  .scenario-panel.is-active {
    flex: initial;
    width: auto;
    min-height: 0;
    border-radius: 0;
    box-shadow: none;
    transition: none;
  }

  .scenario-panel::before {
    background: rgba(9, 18, 33, 0.44);
  }

  .scenario-panel::after {
    background: linear-gradient(180deg, rgba(0, 57, 242, 0.82) 0%, rgba(0, 57, 242, 0.52) 100%);
  }

  .scenario-panel-button {
    position: relative;
    display: flex;
    min-height: 64px;
    align-items: center;
    padding: 18px 50px 18px 18px;
  }

  .scenario-panel-button::after {
    position: absolute;
    top: 50%;
    right: 20px;
    width: 9px;
    height: 9px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    content: "";
    transform: translateY(-62%) rotate(45deg);
    transition: transform 180ms ease;
  }

  .scenario-panel.is-active .scenario-panel-button::after {
    transform: translateY(-36%) rotate(225deg);
  }

  .scenario-collapsed-title {
    position: static;
    flex: 1;
    font-size: 1rem;
    line-height: 1.35;
    text-align: left;
    opacity: 1;
  }

  .scenario-panel.is-active .scenario-collapsed-title {
    opacity: 1;
  }

  .scenario-panel-content {
    display: grid;
    gap: 12px;
    width: auto;
    max-width: none;
    max-height: 0;
    padding: 0 18px;
    overflow: hidden;
    pointer-events: none;
    transition:
      max-height 320ms ease,
      padding 320ms ease;
  }

  .scenario-panel.is-active .scenario-panel-content {
    max-height: var(--scenario-content-height, 0px);
    padding: 0 18px 20px;
    pointer-events: auto;
  }

  .scenario-panel-content h3 {
    display: none;
  }

  .scenario-panel-content p {
    font-size: 0.86rem;
    line-height: 1.72;
  }
}

@media (max-width: 840px) {
  :root {
    --header-height: 62px;
  }

  .site-header {
    grid-template-columns: auto auto;
    padding: 0 18px;
  }

  .menu-toggle {
    display: block;
    justify-self: end;
  }

  .site-nav,
  .header-actions {
    position: fixed;
    right: 18px;
    left: 18px;
    display: none;
    background: #ffffff;
  }

  .site-nav {
    top: var(--header-height);
    flex-direction: column;
    gap: 0;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px 8px 0 0;
    box-shadow: 0 24px 70px rgba(16, 24, 40, 0.14);
  }

  .site-nav a {
    padding: 14px 10px;
  }

  .site-nav a::after {
    display: none;
  }

  .site-header.is-at-top .site-nav {
    color: #344054;
  }

  .header-actions {
    top: calc(var(--header-height) + 240px);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 14px 16px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    border-left: 1px solid var(--line);
    border-radius: 0 0 8px 8px;
    box-shadow: 0 34px 70px rgba(16, 24, 40, 0.14);
  }

  body.menu-open .site-nav,
  body.menu-open .header-actions {
    display: flex;
  }

  .language-switch {
    width: 100%;
  }

  .language-button {
    width: 100%;
    grid-template-columns: auto 1fr auto;
    gap: 8px;
    min-height: 38px;
    padding: 0 12px;
    border-radius: 999px;
    background: var(--soft-blue);
    color: #344054;
  }

  .language-button::after {
    border-top: 5px solid currentColor;
    border-right: 4px solid transparent;
    border-left: 4px solid transparent;
    content: "";
    transition: transform 180ms ease;
  }

  .language-switch.open .language-button::after {
    transform: rotate(180deg);
  }

  .language-current {
    display: block;
    font-size: 0.9rem;
    line-height: 1;
    text-align: left;
  }

  .site-header.is-at-top .language-button {
    color: #344054;
  }

  .site-header.is-at-top .language-button img {
    filter: brightness(0) saturate(100%) invert(19%) sepia(14%) saturate(1436%) hue-rotate(182deg) brightness(93%) contrast(89%);
  }

  .language-options {
    position: static;
    width: 100%;
    margin-top: 10px;
    box-shadow: none;
  }

  body.menu-open .menu-toggle span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

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

  body.menu-open .menu-toggle span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .header-actions .button-primary {
    min-height: 40px;
    transition:
      transform 160ms ease,
      background 160ms ease;
  }

  .header-actions .button-primary:active {
    transform: scale(0.98);
  }

  .hero {
    gap: 42px;
    padding-right: 17px;
    padding-left: 17px;
    padding-top: 64px;
  }

  h1 {
    font-size: clamp(2.15rem, 9.5vw, 3.75rem);
  }

  .hero-title {
    font-size: clamp(1.9rem, 8.2vw, 3.18rem);
  }

  .hero-copy {
    font-size: 0.95rem;
  }

  .hero .eyebrow {
    margin-top: 20px;
    font-size: clamp(0.82rem, 3vw, 1rem);
  }

  .hero-stats {
    gap: 20px 12px;
    margin-top: 42px;
  }

  .product-showcase {
    padding: 54px 0 68px;
  }

  .product-showcase-inner {
    width: min(100% - 34px, 1180px);
  }

  .product-list {
    gap: 39px;
  }

  .product-entry,
  .product-entry.is-reversed {
    gap: 10px;
    grid-template-columns: 1fr;
  }

  .product-entry.is-reversed .product-copy,
  .product-entry.is-reversed .product-image {
    order: initial;
  }

  .product-copy {
    padding: 0 12px;
    text-align: left;
  }

  .product-copy p {
    max-width: none;
  }

  .product-image,
  .product-entry.is-reversed .product-image {
    justify-self: center;
    width: min(76%, 260px);
  }

  .product-tags {
    gap: 12px 18px;
  }

  .contact-strip {
    align-items: center;
  }

  .product-list,
  .trust-grid,
  .growth-grid,
  .ecosystem-network {
    margin-top: 30px;
  }

  .contact-strip .button {
    width: auto;
  }

  .metric-band {
    width: min(100% - 34px, 1180px);
    grid-template-columns: 1fr;
  }

  .metric-band div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .metric-band div:last-child {
    border-bottom: 0;
  }

  .trust-grid {
    grid-auto-rows: auto;
  }

  .feature-card,
  .trust-card,
  .story-grid article {
    min-height: auto;
  }

  .muted-section {
    padding-right: 17px;
    padding-left: 17px;
  }

  .contact-strip {
    grid-template-columns: 1fr;
    width: 100%;
    padding: 46px 24px;
    margin-bottom: 0;
  }

  .site-footer {
    grid-template-columns: 1fr;
    padding: 36px 18px;
  }

  .footer-brand {
    padding-right: 0;
    padding-bottom: 28px;
  }

  .footer-nav,
  .footer-contact {
    border-top: 0;
  }

  .footer-nav::before,
  .footer-contact::before {
    top: 0;
    right: 0;
    left: 0;
    width: 100%;
    height: 1px;
    transform: none;
  }

  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px 8px;
    justify-content: stretch;
    justify-items: stretch;
    padding: 14px 58px;
  }

  .footer-nav a {
    display: flex;
    min-height: 42px;
    align-items: center;
    justify-content: center;
  }

  .footer-contact {
    padding: 28px 0 0;
  }

  .about-hero {
    grid-template-columns: 1fr;
    align-content: center;
    gap: 18px;
    min-height: 0;
    padding-right: 34px;
    padding-left: 34px;
    padding-top: 32px;
    padding-bottom: 28px;
  }

  .about-hero-content {
    justify-self: start;
  }

  html:lang(zh-CN) body[data-page="about"] .about-hero-content,
  html:lang(zh-TW) body[data-page="about"] .about-hero-content {
    justify-self: start;
  }

  .about-visual {
    width: min(72vw, 300px);
    justify-self: center;
    margin-right: 0;
  }

  .about-intro {
    padding-top: 46px;
    padding-bottom: 54px;
  }

  .about-intro-inner {
    width: min(100% - 34px, 1180px);
    gap: 24px;
  }

  .about-intro-heading::after {
    font-size: clamp(1.35rem, 10vw, 2.8rem);
  }

  .about-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 12px;
    margin-top: 2px;
  }

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

  .about-contact-section {
    padding-top: 46px;
    padding-bottom: 54px;
  }

  .about-contact-inner {
    width: min(100% - 34px, 1180px);
  }

  .about-contact-list {
    width: 100%;
    grid-template-columns: 1fr;
  }

  .about-contact-item {
    padding: 0;
  }

  .principle-list div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

}

@media (min-width: 521px) and (max-width: 840px) {
  .hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .feature-grid,
  .trust-grid,
  .growth-grid,
  .story-grid {
    grid-template-columns: 1fr;
  }

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

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

  .hero {
    --hero-video-height: 24rem;
    --hero-video-space: clamp(6rem, calc(var(--hero-video-height) - 16rem), 10rem);
    padding-bottom: var(--hero-video-space);
  }

  .hero-visual video {
    right: auto;
    bottom: 0;
    left: 50%;
    width: auto;
    height: var(--hero-video-height);
    aspect-ratio: 16 / 9;
    transform: translate(-50%, 16.6667%);
  }
}

@media (min-width: 681px) and (max-width: 1080px) {
  .hero-visual video {
    bottom: clamp(-120px, -10vh, -72px);
  }
}

@media (max-width: 460px) {
  .about-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 520px) {
  .brand-logo {
    width: 129px;
    height: auto;
  }

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

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

  .hero-title,
  .hero .eyebrow,
  .hero-copy,
  .hero-stats {
    animation: none;
  }

  body.reveal-ready .reveal-item,
  body.reveal-ready .reveal-item.is-visible {
    opacity: 1;
    filter: none;
    transform: none;
  }

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