@charset "UTF-8";
:root {
  --brand: #238ee8;
  --brand-dark: #126fca;
  --brand-soft: #eaf5ff;
  --ink: #10243f;
  --muted: #687a91;
  --line: #cfe2f5;
  --surface: #ffffff;
  --surface-soft: #f6f9fc;
  --deep: #0d1d32;
  --shadow: 0 18px 44px rgba(32, 87, 139, 0.14);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}
body {
  min-width: 320px;
  margin: 0;
  padding-top: 76px;
  color: var(--ink);
  background: var(--surface);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}
a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
button, summary {
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}
button {
  border: 0;
}
img {
  display: block;
  max-width: 100%;
}
p, h1, h2, h3 {
  margin-top: 0;
}
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  min-height: 76px;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 5px 18px rgba(24, 67, 107, 0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 34px;
  width: min(1180px, calc(100% - 40px));
  min-height: 76px;
  margin: 0 auto;
}
.brand, .footer-brand {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 10px;
}
.brand img, .footer-brand img {
  width: 44px;
  height: 44px;
  object-fit: cover;
  border-radius: 5px;
}
.brand span, .footer-brand span {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand b, .footer-brand b {
  font-size: 19px;
  font-weight: 800;
}
.brand small, .footer-brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}
.main-nav {
  margin-left: auto;
}
.main-nav ul, .footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 28px;
  padding: 0;
  margin: 0;
  list-style: none;
}
.main-nav a {
  display: inline-block;
  padding: 8px 0;
  font-size: 15px;
  font-weight: 800;
}
.main-nav a:hover, .main-nav a:focus-visible {
  color: var(--brand);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.desktop-download, .mobile-download, .primary-button, .download-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 18px;
  color: #fff;
  background: var(--brand);
  border-radius: 5px;
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
  transition: background 0.2s ease, transform 0.2s ease;
}
.desktop-download:hover, .mobile-download:hover, .primary-button:hover, .download-button:hover {
  background: var(--brand-dark);
  transform: translateY(-2px);
}
.mobile-download, .menu-toggle {
  display: none;
}
.menu-toggle {
  width: 42px;
  height: 42px;
  padding: 9px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 5px;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  margin: 4px 0;
  background: var(--ink);
}
.hero {
  overflow: hidden;
  background: radial-gradient(circle at 78% 37%, #d9f0ff 0, #f2f9ff 25%, #fff 58%);
}
.hero-inner {
  display: flex;
  align-items: center;
  gap: clamp(48px, 7vw, 108px);
  width: min(1200px, calc(100% - 40px));
  min-height: 690px;
  padding: 72px 0 84px;
  margin: 0 auto;
}
.hero-copy {
  max-width: 620px;
}
.eyebrow, .section-heading > span, .download-inner > div > span {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.14em;
}
.eyebrow {
  padding: 5px 10px;
  background: var(--brand-soft);
  border-radius: 5px;
}
.hero h1 {
  margin-bottom: 12px;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.06em;
}
.hero-slogan {
  margin-bottom: 13px;
  color: var(--brand-dark);
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 800;
}
.hero-description {
  max-width: 600px;
  margin-bottom: 26px;
  color: #526b86;
}
.hero-actions {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.age-label {
  color: var(--muted);
  font-size: 12px;
}
.hero-carousel {
  flex: none;
  width: clamp(280px, 30vw, 360px);
  height: clamp(498px, 53.333vw, 640px);
  padding: 4px;
  margin-left: auto;
  background: var(--deep);
  border: 4px solid var(--deep);
  border-radius: 5px;
  box-shadow: var(--shadow);
}
.app-swiper, .app-swiper .swiper-wrapper, .app-swiper .swiper-slide, .app-swiper .swiper-slide img {
  width: 100%;
  height: 100%;
}
.app-swiper {
  overflow: hidden;
  background: #dceafa;
  border-radius: 5px;
}
.app-swiper .swiper-slide img {
  object-fit: contain;
  object-position: center;
}
.app-swiper .swiper-pagination {
  bottom: 10px;
}
.app-swiper .swiper-pagination-bullet {
  width: 22px;
  height: 5px;
  margin: 0 4px;
  background: #8fa8c2;
  border-radius: 5px;
  opacity: 1;
}
.app-swiper .swiper-pagination-bullet-active {
  background: var(--brand);
}
.section {
  padding: 96px 0;
  scroll-margin-top: 96px;
}
.section-inner {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}
.section-heading {
  max-width: 620px;
  margin-bottom: 32px;
}
.section-heading h2 {
  margin-bottom: 10px;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.05em;
}
.section-heading p {
  margin-bottom: 0;
  color: var(--muted);
}
.section-heading-center {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}
.features-section {
  background: var(--surface-soft);
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.feature-card {
  min-height: 240px;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 5px;
}
.feature-card-main {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: 72px minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  min-height: 190px;
  background: #f5fbff;
}
.feature-card > img {
  width: 48px;
  height: 48px;
  padding: 10px;
  margin-bottom: 24px;
  background: var(--brand-soft);
  border-radius: 5px;
}
.feature-card-main > img {
  width: 72px;
  height: 72px;
  padding: 15px;
  margin: 0;
}
.feature-card span {
  display: block;
  margin-bottom: 8px;
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
}
.feature-card h3 {
  margin-bottom: 9px;
  font-size: 22px;
  line-height: 1.25;
}
.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}
.feature-card strong {
  padding: 9px 12px;
  color: var(--brand-dark);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 5px;
  font-size: 13px;
  white-space: nowrap;
}
.faq-section {
  background: #fff;
}
.faq-list {
  width: min(100%, 920px);
  margin: 0 auto;
}
.faq-list details {
  margin-bottom: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 5px;
}
.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 18px 22px;
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}
.faq-list summary::-webkit-details-marker {
  display: none;
}
.faq-list summary i {
  display: grid;
  flex: none;
  width: 30px;
  height: 30px;
  place-items: center;
  color: var(--brand-dark);
  background: var(--brand-soft);
  border-radius: 5px;
  font-size: 24px;
  font-style: normal;
  font-weight: 400;
  line-height: 1;
}
.faq-list details[open] {
  border-color: #8fc7f5;
  box-shadow: inset 4px 0 0 var(--brand);
}
.faq-list details[open] summary i {
  transform: rotate(45deg);
}
.faq-list details p {
  max-width: 850px;
  padding: 0 22px 20px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}
.faq-list details a {
  color: var(--brand-dark);
  text-decoration: underline;
}
.reviews-section {
  background: var(--surface-soft);
}
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}
.review-card {
  display: flex;
  flex-direction: column;
  min-height: 300px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 5px;
  box-shadow: 0 12px 30px rgba(32, 87, 139, 0.06);
}
.review-card header {
  display: flex;
  align-items: center;
  gap: 11px;
}
.review-card header img {
  width: 42px;
  height: 42px;
  padding: 8px;
  background: var(--brand-soft);
  border-radius: 5px;
}
.review-card header div {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}
.review-card header b {
  font-size: 15px;
}
.review-card header span {
  margin-top: 4px;
  color: var(--brand);
  font-size: 12px;
  letter-spacing: 0.05em;
}
.review-card > p {
  margin: 18px 0 14px;
  color: #526b86;
  font-size: 14px;
}
.review-card time {
  margin-top: auto;
  color: var(--muted);
  font-size: 12px;
}
.download-section {
  padding: 0;
  background: var(--deep);
  border-top: 5px dotted var(--brand);
  border-bottom: 5px dotted var(--brand);
}
.download-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  width: min(1080px, calc(100% - 40px));
  padding: 72px 0;
  margin: 0 auto;
  color: #fff;
}
.download-inner > div > span {
  color: #9dd4ff;
}
.download-inner h2 {
  margin-bottom: 10px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.1;
}
.download-inner p {
  max-width: 620px;
  margin-bottom: 0;
  color: #c3d5e8;
}
.download-button {
  flex: none;
  background: var(--brand);
}
.site-footer {
  background: #fff;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 30px;
  width: min(1180px, calc(100% - 40px));
  min-height: 150px;
  margin: 0 auto;
}
.footer-nav ul {
  justify-content: center;
  gap: 18px;
}
.footer-nav a {
  color: var(--muted);
  font-size: 14px;
}
.footer-nav a:hover {
  color: var(--brand-dark);
}
.footer-inner > p {
  justify-self: end;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 30;
  display: grid;
  width: 44px;
  height: 44px;
  padding: 0;
  place-items: center;
  color: #fff;
  background: var(--brand);
  border-radius: 5px;
  box-shadow: var(--shadow);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
}
@media (max-width: 980px) {
  .header-inner {
    gap: 18px;
  }
  .main-nav {
    position: fixed;
    top: 76px;
    right: 0;
    left: 0;
    display: none;
    padding: 12px 20px 18px;
    margin: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(32, 87, 139, 0.1);
  }
  .main-nav.is-open {
    display: block;
  }
  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .main-nav li + li {
    border-top: 1px solid var(--line);
  }
  .main-nav a {
    display: block;
    padding: 13px 0;
  }
  .desktop-download {
    display: none;
  }
  .mobile-download, .menu-toggle {
    display: inline-flex;
  }
  .menu-toggle {
    display: block;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    justify-items: center;
    padding: 34px 0;
    text-align: center;
  }
  .footer-inner > p {
    justify-self: center;
  }
}
@media (max-width: 700px) {
  body {
    padding-top: 70px;
  }
  html {
    scroll-padding-top: 84px;
  }
  .site-header, .header-inner {
    min-height: 70px;
  }
  .header-inner {
    width: min(calc(100% - 28px), 680px);
    gap: 8px;
  }
  .header-actions {
    flex: none;
    margin-left: auto;
    gap: 7px;
  }
  .brand {
    min-width: 0;
    gap: 7px;
  }
  .brand img {
    width: 37px;
    height: 37px;
  }
  .brand b {
    font-size: 16px;
  }
  .brand small {
    font-size: 12px;
  }
  .mobile-download {
    min-height: 38px;
    padding: 8px 10px;
    font-size: 13px;
  }
  .menu-toggle {
    width: 38px;
    height: 38px;
    padding: 8px;
  }
  .main-nav {
    top: 70px;
  }
  .hero-inner {
    flex-direction: column;
    gap: 42px;
    width: min(calc(100% - 28px), 1100px);
    min-height: 0;
    padding: 54px 0 72px;
    text-align: center;
  }
  .hero-copy {
    max-width: 100%;
  }
  .hero h1 {
    font-size: clamp(42px, 13vw, 58px);
  }
  .hero-description {
    margin-right: auto;
    margin-left: auto;
  }
  .hero-carousel {
    align-self: center;
    width: min(100%, 330px);
    height: min(calc((100vw - 28px) * 1.7778), 586px);
    margin-left: 0;
  }
  .section {
    padding: 72px 0;
    scroll-margin-top: 84px;
  }
  .section-inner {
    width: min(calc(100% - 28px), 1080px);
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .feature-card-main {
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 18px;
  }
  .feature-card-main strong {
    grid-column: 1 / -1;
    justify-self: start;
  }
  .feature-card-main > img {
    width: 58px;
    height: 58px;
    padding: 12px;
  }
  .feature-card {
    min-height: 0;
  }
  .faq-list summary {
    min-height: 64px;
    padding: 16px;
  }
  .faq-list details p {
    padding: 0 16px 18px;
  }
  .download-inner {
    flex-direction: column;
    align-items: flex-start;
    width: min(calc(100% - 28px), 1080px);
    padding: 58px 0;
  }
  .download-button {
    align-self: center;
  }
  .back-to-top {
    right: 14px;
    bottom: 14px;
  }
  a, button, summary, .desktop-download, .mobile-download, .primary-button, .download-button, .back-to-top {
    transition: none;
  }
}
@media (max-width: 390px) {
  .header-actions {
    gap: 6px;
  }
  .mobile-download {
    padding: 8px 8px;
  }
  .brand small {
    font-size: 11px;
  }
  .feature-card {
    padding: 22px;
  }
}