:root {
  --page-bg: #eff3ff;
  --ink: #303235;
  --muted: #8e9298;
  --lime: #b9ff09;
  --brand: #2ad181;
  --card: #ebede0;
  --yellow: #fff200;
  --shell: 75rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

section,
footer {
  scroll-margin-top: 5.5rem;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--page-bg);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body,
button,
a {
  font-family: inherit;
}

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

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

button {
  border: 0;
}

.shell {
  width: min(var(--shell), 80%);
  margin-inline: auto;
}

.section-light {
  background-color: var(--page-bg);
}

.section-heading {
  text-align: center;
}

.section-heading h2 {
  margin: 0;
  color: var(--ink);
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  line-height: 1.35;
}

.section-heading p {
  margin: 0.35rem 0 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  line-height: 1.5;
}

.section-intro {
  margin: 0;
  color: #41454b;
  text-align: center;
  font-size: 1.125rem;
  letter-spacing: 0.06em;
  line-height: 2;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 5.5rem;
  margin-bottom: -5.5rem;
  background: rgba(239, 243, 255, 0);
  transition: background 220ms ease, box-shadow 220ms ease, backdrop-filter 220ms ease;
}

.site-header.is-scrolled {
  background: rgba(239, 243, 255, 0.9);
  box-shadow: 0 0.5rem 1.6rem rgba(54, 69, 91, 0.1);
  backdrop-filter: blur(0.9rem);
}

.hero {
  position: relative;
  overflow: hidden;
  background: #e7eef6 url("images/bg@2x.png") center top / cover no-repeat;
}

.topbar {
  display: flex;
  height: 5.5rem;
  align-items: center;
}

.brand {
  display: block;
  width: 5%;
  flex: 0 0 5%;
  aspect-ratio: 1;
}

.brand img {
  width: 100%;
}

.nav-links {
  display: flex;
  margin-left: 9rem;
  align-items: center;
  gap: 4.6rem;
  color: #a1a5aa;
  font-size: 1rem;
  white-space: nowrap;
}

.nav-links a {
  position: relative;
  display: flex;
  height: 3.75rem;
  padding: 0;
  align-items: center;
  transition: color 180ms ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: #111;
}

.nav-links a.active::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 0.125rem;
  background: #111;
  content: "";
}

.hero-copy {
  position: relative;
  z-index: 1;
  padding-top: 14.6rem;
  padding-bottom: 11rem;
}

.hero-lockup {
  width: 74.1%;
  height: auto;
}

.primary-button {
  display: inline-flex;
  margin-top: 2.9rem;
  padding: 1.15rem 3rem;
  align-items: center;
  justify-content: center;
  border-radius: 0.2rem;
  background: #111;
  color: var(--lime);
  font-size: 1.55rem;
  font-weight: 700;
  transition: transform 180ms ease, background 180ms ease;
}

.primary-button:hover {
  transform: translateY(-0.15rem);
  background: #272727;
}

.quick-nav {
  background-color: var(--brand);
  background-image: url("images/img@2x.png");
  background-position: center;
  background-size: 100% 100%;
}

.quick-nav-inner {
  display: grid;
  padding-block: 1.8rem;
  grid-template-columns: repeat(7, 1fr);
}

.quick-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.72rem;
  color: #161616;
  font-size: 0.98rem;
  transition: transform 180ms ease;
}

.quick-nav a:nth-child(n + 4) {
  color: #fff;
}

.quick-nav a:hover {
  transform: translateY(-0.2rem);
}

.quick-icon {
  display: grid;
  width: 2.9rem;
  height: 2.9rem;
  place-items: center;
  border: 0.11rem solid currentColor;
  border-radius: 50%;
  font-size: 1.35rem;
  line-height: 1;
}

.platform-section {
  position: relative;
  overflow: hidden;
}

.platform-section::before {
  position: absolute;
  top: 0;
  left: 50%;
  width: 39rem;
  height: 34rem;
  transform: translateX(-50%);
  background-image:
    linear-gradient(rgba(215, 221, 199, 0.26) 0.0625rem, transparent 0.0625rem),
    linear-gradient(90deg, rgba(215, 221, 199, 0.26) 0.0625rem, transparent 0.0625rem),
    radial-gradient(circle, rgba(255, 247, 151, 0.4), transparent 58%);
  background-size: 2.75rem 2.75rem, 2.75rem 2.75rem, 100% 100%;
  content: "";
  opacity: 0.58;
}

.platform-content {
  position: relative;
  z-index: 1;
  padding-block: 5.8rem 14rem;
}

.platform-content .section-intro {
  margin-top: 5.4rem;
}

.video-frame {
  position: relative;
  width: 75%;
  aspect-ratio: 16 / 9;
  margin: 4.6rem auto 0;
  overflow: hidden;
  border-radius: 0.62rem;
  background: #071222;
  box-shadow: 0 1rem 3rem rgba(31, 48, 83, 0.08);
  cursor: pointer;
}

.video-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.play-button,
.disk-play {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 4rem;
  height: 4rem;
  transform: translate(-50%, -50%);
  place-items: center;
  border: 0.08rem solid rgba(255, 255, 255, 0.82);
  border-radius: 50%;
  background: rgba(5, 13, 28, 0.55);
  color: #fff;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease;
}

.play-button:hover,
.disk-play:hover {
  transform: translate(-50%, -50%) scale(1.08);
  background: rgba(5, 13, 28, 0.78);
}

.play-button span {
  width: 0;
  height: 0;
  margin-left: 0.24rem;
  border-top: 0.65rem solid transparent;
  border-bottom: 0.65rem solid transparent;
  border-left: 1rem solid #fff;
}

.video-frame.is-playing .play-button {
  opacity: 0;
  pointer-events: none;
}

.video-watermark {
  position: absolute;
  right: 0.9rem;
  bottom: 0.75rem;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.82rem;
  font-weight: 700;
}

.synthesis-section {
  background: #eaf0f8 url("images/bg2@2x.png") center / cover no-repeat;
}

.synthesis-content {
  position: relative;
  padding-block: 3.7rem 7rem;
}

.synthesis-content > .section-intro {
  margin-top: 3.2rem;
}

.synthesis-card {
  position: relative;
  display: grid;
  width: 100%;
  margin-top: 7.5rem;
  grid-template-columns: 45% 1fr;
  overflow: hidden;
  border-radius: 0.2rem;
  box-shadow: 0 1rem 3rem rgba(49, 66, 92, 0.08);
}

.synthesis-visual {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  background:
    radial-gradient(circle at center, rgba(50, 171, 255, 0.24) 0 7%, transparent 7.5% 10%, rgba(71, 161, 255, 0.28) 10.5% 11%, transparent 11.5% 17%, rgba(51, 120, 255, 0.18) 17.5% 18.2%, transparent 18.7% 24%, rgba(32, 125, 246, 0.3) 24.5% 25.1%, transparent 25.6% 31%, rgba(49, 135, 255, 0.19) 31.5% 32.2%, transparent 32.7%),
    conic-gradient(from 12deg, #06112a, #0c48a0 16%, #041636 31%, #0f64bf 48%, #06152e 61%, #0871cc 78%, #061126);
}

.synthesis-visual::before,
.synthesis-visual::after {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 0.12rem solid rgba(93, 185, 255, 0.62);
  border-radius: 50%;
  content: "";
  transform: translate(-50%, -50%);
}

.synthesis-visual::before {
  width: 25rem;
  height: 25rem;
  border-style: dashed;
}

.synthesis-visual::after {
  width: 18rem;
  height: 18rem;
  border-width: 0.35rem;
  opacity: 0.45;
}

.tech-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit-one {
  width: 29rem;
  height: 29rem;
  border: 0.7rem double rgba(44, 129, 238, 0.4);
}

.orbit-two {
  width: 13rem;
  height: 13rem;
  border: 1.3rem ridge rgba(89, 172, 255, 0.52);
}

.tech-core {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 8rem;
  height: 8rem;
  transform: translate(-50%, -50%);
  place-items: center;
  border: 0.45rem solid rgba(116, 201, 255, 0.85);
  border-radius: 45% 55% 48% 52%;
  box-shadow: 0 0 2rem #1597ff, inset 0 0 2rem rgba(25, 153, 255, 0.7);
}

.tech-core span {
  width: 3rem;
  height: 3rem;
  border: 0.35rem solid #c6ecff;
  border-radius: 50%;
}

.disk-play {
  z-index: 2;
  width: 3.8rem;
  height: 3.8rem;
  padding-left: 0.2rem;
  font-size: 1.1rem;
}

.synthesis-copy {
  position: relative;
  display: flex;
  padding: 2.75rem 3rem 4.4rem;
  flex-direction: column;
  justify-content: space-between;
  background: linear-gradient(180deg, #d2ef2d 0%, #a7d321 42%, #347f1f 100%);
  color: #fff;
}

.synthesis-copy h3 {
  margin: 0;
  font-size: 1.55rem;
  letter-spacing: 0.08em;
}

.synthesis-copy p {
  margin: 0.7rem 0 0;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  line-height: 2;
}

.white-rule {
  display: block;
  width: 2.5rem;
  height: 0.22rem;
  margin-top: 0.7rem;
  background: #fff;
}

.synthesis-icons {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: grid;
  height: 4.2rem;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
}

.synthesis-icons img {
  width: 3rem;
  margin: auto;
}

.synthesis-icons img + img {
  border-left: 0.07rem solid rgba(255, 255, 255, 0.45);
  padding-left: calc((100% - 3rem) / 2);
  box-sizing: content-box;
}

.advantages-section {
  padding-block: 4.5rem 8rem;
}

.advantages-content {
  position: relative;
}

.advantages-content > .section-intro {
  margin-top: 3.3rem;
}

.advantage-grid {
  display: grid;
  width: 100%;
  margin-top: 5rem;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem 4.5%;
}

.advantage-card {
  display: flex;
  padding: 1.3rem 2rem 1.8rem;
  align-items: center;
  flex-direction: column;
  border-radius: 0.55rem;
  background: var(--card);
  color: #303235;
  text-align: center;
  transition: color 180ms ease, background 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.advantage-card:hover {
  background: var(--brand);
  color: #fff;
  transform: translateY(-0.45rem);
  box-shadow: 0 1.25rem 2.5rem rgba(43, 95, 80, 0.12);
}

.card-icon {
  width: 43%;
  aspect-ratio: 1;
  margin-top: -0.75rem;
  object-fit: contain;
}

.advantage-card h3 {
  margin: -0.1rem 0 1rem;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.35;
}

.card-figure {
  width: 100%;
  aspect-ratio: 15 / 7;
  object-fit: cover;
  border-radius: 0.55rem;
}

.yellow-rule {
  display: block;
  width: 2.55rem;
  height: 0.375rem;
  margin: 2rem auto 1.35rem;
  background: var(--yellow);
}

.advantage-card p {
  margin: 0;
  font-size: 1.03rem;
  letter-spacing: 0.035em;
  line-height: 1.88;
  text-align: justify;
  text-align-last: center;
}

.monetization-section {
  position: relative;
  overflow: hidden;
  background: #e9c990 url("images/bg@2x (2).png") center / cover no-repeat;
  padding-top: 4.4rem;
}

.monetization-copy {
  position: relative;
  z-index: 2;
}

.dark-brown h2,
.dark-brown p,
.monetization-copy .section-intro {
  color: #5d2b14;
}

.monetization-copy > .section-intro {
  margin-top: 2rem;
  line-height: 1.8;
}

.phone-showcase {
  position: relative;
  z-index: 1;
  display: flex;
  width: 92.4%;
  margin: 2.2rem auto 0;
  padding-bottom: 1.2rem;
  align-items: flex-end;
  justify-content: center;
  gap: 1.4rem;
}

.phone-showcase img {
  width: calc((100% - 5.6rem) / 5);
  max-width: 20.0625rem;
  height: auto;
  filter: drop-shadow(0 0.7rem 0.75rem rgba(50, 28, 16, 0.16));
}

.roles-section {
  padding-block: 5.1rem 8rem;
}

.roles-content {
}

.roles-content > .section-intro {
  margin-top: 3.2rem;
}

.role-list {
  margin-top: 5rem;
}

.role-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  column-gap: 6.2rem;
}

.role-row + .role-row {
  margin-top: 1.35rem;
}

.role-row img {
  width: 100%;
  aspect-ratio: 119 / 76;
  justify-self: end;
  object-fit: cover;
}

.role-row.reverse img {
  justify-self: start;
}

.role-copy h3 {
  margin: 0 0 0.65rem;
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.role-copy p {
  margin: 0;
  font-size: 1.05rem;
  letter-spacing: 0.035em;
  line-height: 2;
  text-align: justify;
}

.about-section {
  background: #dff1ff url("images/bg4@2x.png") center / cover no-repeat;
}

.about-content {
  padding-block: 4.3rem 6rem;
}

.about-content > .section-intro {
  margin-top: 3.8rem;
}

.about-grid {
  display: grid;
  margin-top: 4.6rem;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
}

.about-card {
  display: flex;
  padding: 1.9rem 1.7rem;
  align-items: center;
  flex-direction: column;
  justify-content: flex-start;
  background: rgba(255, 255, 255, 0.9);
  text-align: center;
  transition: color 180ms ease, background 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.about-card:hover {
  background: var(--lime);
  color: #151515;
  transform: translateY(-0.35rem);
  box-shadow: 0 1rem 2.3rem rgba(37, 82, 105, 0.1);
}

.about-card h3 {
  margin: 0 0 1.3rem;
  font-size: 1.45rem;
  letter-spacing: 0.08em;
}

.about-card p {
  margin: 0;
  color: #9da1a7;
  font-size: 1.08rem;
  letter-spacing: 0.04em;
  line-height: 2;
}

.about-card:hover p {
  color: #171717;
}

.partners-section {
  position: relative;
  overflow: hidden;
  padding-block: 3.6rem 5rem;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.75), transparent 38%),
    linear-gradient(225deg, rgba(255, 255, 255, 0.62), transparent 42%),
    #e9effb;
}

.partners-section::before,
.partners-section::after {
  position: absolute;
  width: 60rem;
  height: 28rem;
  border: 4rem solid rgba(255, 255, 255, 0.28);
  content: "";
  transform: rotate(28deg);
}

.partners-section::before {
  top: -18rem;
  left: -20rem;
}

.partners-section::after {
  right: -15rem;
  bottom: -23rem;
}

.partners-content {
  position: relative;
  z-index: 1;
  width: min(81.25rem, 84%);
  margin-inline: auto;
}

.partners-intro {
  margin: 0.6rem 0 0;
  text-align: center;
  font-size: 0.98rem;
  letter-spacing: 0.07em;
}

.green-rule {
  display: block;
  width: 1.5rem;
  height: 0.25rem;
  margin: 1.45rem auto 2.9rem;
  background: var(--lime);
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 2.35rem 2.75%;
}

.partner-grid > div {
  display: grid;
  width: 100%;
  aspect-ratio: 23 / 12;
  place-items: center;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.92);
}

.partner-grid img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.site-footer {
  background: var(--brand);
  color: #fff;
  text-align: center;
}

.footer-inner {
  width: 96%;
  margin-inline: auto;
  padding-block: 6.7rem 3rem;
}

.hotline-label {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.hotlines {
  display: flex;
  margin-top: 1.7rem;
  justify-content: center;
  gap: 4.2rem;
}

.hotlines a {
  font-size: 2.85rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.footer-rule {
  display: block;
  width: 100%;
  height: 0.0625rem;
  margin: 5.3rem auto 2.6rem;
  background: rgba(255, 255, 255, 0.6);
}

.footer-meta p {
  margin: 0.75rem 0;
  font-size: 0.88rem;
  letter-spacing: 0.03em;
}

.wechat-mask[hidden],
.site-toast[hidden] {
  display: none;
}

.wechat-mask {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  padding-top: 22vh;
  align-items: center;
  flex-direction: column;
  background: rgba(0, 0, 0, 0.72);
  color: #fff;
}

.wechat-mask-close {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: transparent;
  cursor: pointer;
}

.wechat-arrow {
  position: absolute;
  top: 2.5rem;
  right: 5%;
  font-family: Arial, sans-serif;
  font-size: 7rem;
  font-weight: 200;
  line-height: 1;
  transform: rotate(-10deg);
}

.wechat-guide {
  position: relative;
  z-index: 1;
  text-align: center;
  pointer-events: none;
}

.wechat-guide p {
  margin: 0.6rem 0;
  font-size: 2rem;
  letter-spacing: 0.08em;
}

.site-toast {
  position: fixed;
  z-index: 1100;
  top: 50%;
  left: 50%;
  padding: 0.95rem 1.6rem;
  transform: translate(-50%, -50%);
  border-radius: 0.5rem;
  background: rgba(17, 17, 17, 0.88);
  color: #fff;
  font-size: 1rem;
  box-shadow: 0 0.8rem 2.2rem rgba(0, 0, 0, 0.2);
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}