:root {
  --ink: #111; --paper: #f5f5f1; --line: #d8d8d2; --muted: #676762; --lime: #c9ff2f; --dark: #171b14;
  --pink: #ff3b71;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0; color: var(--ink); background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; line-height: 1.7;
}
a {
  color: inherit; text-decoration: none;
}
.shell {
  width: min(1160px, calc(100% - 48px)); margin: auto;
}
.site-header {
  position: fixed; z-index: 30; top: 0; left: 0; width: 100%; background: rgba(245,245,241,.94);
  border-bottom: 1px solid rgba(17,17,17,.1); backdrop-filter: blur(12px);
}
.nav-wrap {
  display: flex; align-items: center; gap: 40px; height: 74px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 900; white-space: nowrap;
}
.brand img {
  width: 38px; height: 38px; object-fit: cover; border-radius: 5px;
}
.desktop-nav {
  display: flex; gap: 25px; margin-left: auto; font-size: 14px; font-weight: 700;
}
.desktop-nav a {
  padding: 25px 0;
}
.nav-actions {
  display: flex; gap: 12px; align-items: center;
}
.nav-download, .button-primary {
  color: #fff; background: var(--ink); font-weight: 900;
}
.nav-download {
  padding: 10px 17px; border-radius: 5px; font-size: 14px;
}
.menu-toggle {
  display: none; width: 39px; height: 39px; padding: 9px; border: 1px solid var(--ink); border-radius: 5px;
  background: transparent; cursor: pointer;
}
.menu-toggle i {
  display: block; height: 2px; margin: 4px 0; background: var(--ink);
}
.mobile-nav {
  display: none;
}
.hero {
  position: relative; min-height: 750px; padding: 145px 0 88px; overflow: hidden;
  background: linear-gradient(112deg, var(--paper) 0 55%, #e7edc9 55%);
}
.hero::before {
  position: absolute; inset: 0 0 0 auto; width: 50vw; content: "";
  background-image: linear-gradient(rgba(17,17,17,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(17,17,17,.05) 1px, transparent 1px);
  background-size: 35px 35px;
}
.hero-layout {
  position: relative; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 65px;
}
.eyebrow {
  margin: 0 0 12px; color: #697115; font: 800 12px/1.2 Arial, sans-serif; letter-spacing: 2px;
}
.hero h1 {
  margin: 0 0 27px; font-size: clamp(52px, 7vw, 90px); font-weight: 900; line-height: .98; letter-spacing: -4px;
}
.hero-intro {
  max-width: 510px; margin: 0; color: #393934; font-size: 17px; line-height: 2;
}
.hero-actions {
  display: flex; gap: 28px; align-items: center; margin-top: 28px;
}
.button {
  display: inline-flex; gap: 38px; align-items: center; justify-content: space-between; padding: 15px 18px 15px 22px;
  border-radius: 5px;
}
.button b {
  font-size: 22px; line-height: 1;
}
.text-action {
  padding-bottom: 3px; border-bottom: 1px solid var(--ink); font-size: 15px; font-weight: 900;
}
.age-label {
  display: block; margin: 12px 0 0; color: #4d4d48; font-size: 13px;
}
.hero-metrics {
  display: flex; gap: 28px; margin: 44px 0 0; padding: 22px 0 0; border-top: 1px solid var(--line);
}
.hero-metrics div {
  min-width: 94px;
}
.hero-metrics dt {
  font: 900 20px/1.2 Arial, sans-serif;
}
.hero-metrics dd {
  margin: 5px 0 0; color: var(--muted); font-size: 12px;
}
.device-stage {
  position: relative; display: grid; height: 520px; place-items: center;
}
.stage-orbit {
  position: absolute; border: 1px solid rgba(17,17,17,.18); border-radius: 50%; transform: rotate(-22deg);
}
.orbit-one {
  width: 445px; height: 230px;
}
.orbit-two {
  width: 490px; height: 160px;
}
.phone {
  position: relative; z-index: 1; width: 265px; height: 505px; padding: 0; border: 8px solid #151515;
  border-radius: 34px; background: #151515; box-shadow: 20px 25px 0 rgba(17,17,17,.16),0 22px 40px rgba(25,35,5,.33);
}
.phone-speaker {
  position: absolute; z-index: 2; top: 7px; left: 50%; width: 70px; height: 17px; border-radius: 0 0 13px 13px;
  background: #151515; transform: translateX(-50%);
}
.phone-screen {
  height: 100%; padding: 15px 15px 13px; overflow: hidden; border-radius: 26px; background: #f3f4e8;
}
.phone-status {
  display: flex; justify-content: space-between; height: 18px; padding: 0 7px; font: 800 8px Arial;
}
.phone-head {
  display: flex; gap: 8px; align-items: center; padding: 5px 4px 13px;
}
.phone-head img {
  width: 28px; border-radius: 5px;
}
.phone-head strong,.phone-head small,.frame-card b,.frame-card span,.tool-card b,.tool-card small {
  display: block; line-height: 1.25;
}
.phone-head strong {
  font-size: 12px;
}
.phone-head small,.setting-row small,.tool-card small {
  color: #777; font-size: 8px;
}
.online-dot {
  width: 7px; height: 7px; margin-left: auto; border-radius: 50%; background: var(--lime);
}
.mode-tabs {
  display: flex; padding: 3px; border-radius: 5px; background: #e2e4d8;
}
.mode-tab {
  flex: 1; padding: 6px 0; border: 0; background: transparent; font: 800 9px inherit; cursor: pointer;
}
.mode-tab.is-active {
  border-radius: 5px; color: #fff; background: var(--ink);
}
.phone-panel {
  display: none; min-height: 272px; padding-top: 16px;
}
.phone-panel.is-visible {
  display: block;
}
.panel-label {
  margin: 0 0 9px; font-size: 11px; font-weight: 900;
}
.preset-row {
  display: flex; gap: 5px; margin-bottom: 12px;
}
.preset {
  padding: 6px 8px; border: 1px solid #c4c6b9; border-radius: 5px; background: transparent; font-size: 9px;
  cursor: pointer;
}
.preset.is-selected {
  border-color: var(--lime); background: var(--lime); font-weight: 900;
}
.setting-row {
  display: flex; align-items: center; justify-content: space-between; padding: 12px 1px;
  border-top: 1px solid #d9dbcf; font-size: 10px; font-weight: 800;
}
.setting-row small {
  display: block; margin-top: 2px; font-weight: 400;
}
.switch {
  width: 30px; height: 17px; padding: 2px; border: 0; border-radius: 50px; background: #b9bbb1; cursor: pointer;
}
.switch i {
  display: block; width: 13px; height: 13px; border-radius: 50%; background: #fff;
}
.switch.is-on {
  background: var(--ink);
}
.switch.is-on i {
  transform: translateX(13px);
}
.frame-card {
  padding: 15px; margin-bottom: 13px; border-radius: 5px; color: #fff; background: var(--ink);
}
.frame-card b {
  font-size: 23px;
}
.frame-card span {
  margin-top: 5px; color: #d1d1ca; font-size: 9px;
}
.tool-card {
  display: flex; gap: 10px; align-items: center; padding: 12px 2px; border-top: 1px solid #d9dbcf;
}
.tool-card>span {
  color: #71820f; font-size: 19px;
}
.tool-card b {
  font-size: 10px;
}
.phone-start {
  display: flex; justify-content: space-between; width: 100%; padding: 11px; border: 0; border-radius: 5px;
  background: var(--lime); font-size: 11px; font-weight: 900; cursor: pointer;
}
.phone-start.is-ready {
  color: #fff; background: var(--ink);
}
.device-caption {
  position: absolute; right: 10px; bottom: -4px; font-size: 11px; font-weight: 700;
}
.device-caption span {
  display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--pink);
}
.section-heading h2,.review-heading h2,.download-section h2 {
  margin: 0; font-size: clamp(38px,5vw,62px); font-weight: 900; line-height: 1; letter-spacing: -3px;
}
.section-heading>p:not(.eyebrow) {
  max-width: 490px; margin: 18px 0 0; color: var(--muted);
}
.feature-section {
  padding: 105px 0; background: #fff;
}
.feature-grid {
  display: grid; grid-template-columns: repeat(4,1fr); margin-top: 58px; border-top: 1px solid var(--ink);
}
.feature-grid article {
  min-height: 265px; padding: 23px 22px; border-right: 1px solid var(--line);
}
.feature-grid article:first-child {
  border-left: 1px solid var(--line);
}
.feature-grid span {
  color: #7e8d16; font: 900 12px Arial;
}
.feature-grid h3 {
  margin: 50px 0 10px; font-size: 19px;
}
.feature-grid p {
  margin: 0; color: #555650; font-size: 14px; line-height: 1.9;
}
.steps-section {
  padding: 108px 0; color: #fff; background: var(--dark);
}
.steps-layout,.faq-layout {
  display: grid; grid-template-columns: .83fr 1.17fr; gap: 105px;
}
.steps-section .eyebrow {
  color: var(--lime);
}
.steps-section .section-heading>p:not(.eyebrow) {
  color: #ced0c9;
}
.steps-list {
  margin: 0; padding: 0; list-style: none;
}
.steps-list li {
  display: grid; grid-template-columns: 70px 1fr; gap: 20px; padding: 0 0 27px; margin-bottom: 27px;
  border-bottom: 1px solid rgba(255,255,255,.21);
}
.steps-list em {
  color: var(--lime); font: 900 14px Arial; font-style: normal;
}
.steps-list h3 {
  margin: 0 0 5px; font-size: 21px;
}
.steps-list p {
  margin: 0; color: #c8c9c1; font-size: 14px;
}
.screens-section {
  padding: 106px 0; background: #e8e9dc;
}
.split-heading,.review-heading {
  display: flex; align-items: end; justify-content: space-between;
}
.split-heading>p:not(.eyebrow),.review-heading>p {
  max-width: 370px; margin: 0;
}
.screens-scroll {
  margin-top: 50px;
}
.screens-grid {
  display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 18px;
}
.screen-card {
  margin: 0; padding: 12px; border-radius: 5px; background: #d3d5c7;
}
.screen-card img {
  display: block; width: 100%; height: auto; border-radius: 3px; object-fit: contain;
}
.screen-card figcaption {
  margin-top: 11px; color: #34352f; font-size: 12px; font-weight: 700; line-height: 1.55;
}
.faq-section {
  padding: 110px 0; background: #fff;
}
.faq-list {
  border-top: 1px solid var(--ink);
}
.faq-list article {
  border-bottom: 1px solid var(--line);
}
.faq-list button {
  display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 21px 0; border: 0;
  background: transparent; font: 800 17px inherit; text-align: left; cursor: pointer;
}
.faq-list button b {
  font-size: 25px; font-weight: 400;
}
.faq-list article>div {
  display: grid; grid-template-rows: 0fr;
}
.faq-list article.is-open>div {
  grid-template-rows: 1fr;
}
.faq-list article>div>p {
  margin: 0; overflow: hidden; color: #5f6059; font-size: 14px;
}
.faq-list article.is-open>div>p {
  padding: 0 30px 20px 0;
}
.review-section {
  padding: 105px 0; color: #fff; background: #24132d;
}
.review-section .eyebrow {
  color: #ffe345;
}
.review-grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin-top: 50px;
}
.review-card {
  display: flex; flex-direction: column; min-height: 275px; padding: 24px 23px 19px;
  border-top: 4px solid var(--pink); border-radius: 5px; color: #1b1830; background: #fff;
}
.review-card:nth-child(2),.review-card:nth-child(5) {
  border-top-color: #ffdb36;
}
.review-card header {
  display: flex; gap: 9px; align-items: center; font-size: 14px;
}
.review-card header i {
  width: 35px; height: 35px; border-radius: 50%;
  background: var(--pink) url('../icons/avatar.svg') center/20px no-repeat;
}
.review-card header span {
  margin-left: auto; color: var(--pink); font-size: 12px;
}
.review-card>p {
  margin: 20px 0; color: #211832; font-size: 13px; line-height: 1.85;
}
.review-card footer {
  margin-top: auto; color: #5d5a6e; font-size: 11px; text-align: right;
}
.download-section {
  padding: 92px 0; background: var(--lime);
}
.download-layout {
  display: flex; align-items: center; justify-content: space-between; gap: 40px;
}
.download-section .eyebrow {
  color: #4b5710;
}
.download-section h2 {
  font-size: clamp(36px,4vw,54px);
}
.download-section p:not(.eyebrow) {
  margin: 14px 0 0; color: #40500a;
}
.back-to-top {
  position: fixed; z-index: 25; right: 26px; bottom: 25px; display: flex; flex-direction: column;
  align-items: center; justify-content: center; width: 52px; height: 52px; border: 1px solid rgba(17,17,17,.2);
  border-radius: 5px; color: #fff; background: var(--ink); box-shadow: 0 8px 22px rgba(0,0,0,.18); font-size: 10px;
  font-weight: 800; opacity: 0; visibility: hidden; pointer-events: none;
}
.back-to-top.is-visible {
  opacity: 1; visibility: visible; pointer-events: auto;
}
.back-to-top span {
  font: 900 22px/18px Arial,sans-serif;
}
.back-to-top b {
  margin-top: 3px; font-size: 9px;
}
.back-to-top:hover {
  color: var(--ink); background: var(--lime);
}
.site-footer {
  position: relative; padding: 17px 0; color: #fff; background: #050505; border-top: 1px solid rgba(201,255,47,.5);
}
.site-footer::before {
  position: absolute; top: 0; left: 0; width: 27%; height: 3px; content: ""; background: var(--lime);
}
.footer-layout {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 44px; align-items: center; min-height: 62px;
}
.footer-brand {
  gap: 12px; font-size: 17px; letter-spacing: -.2px;
}
.footer-brand img {
  width: 43px; height: 43px; filter: invert(1);
}
.footer-brand span {
  line-height: 1.1;
}
.footer-brand small {
  display: block; margin-top: 5px; color: #95a898; font-size: 10px; font-weight: 500; letter-spacing: 0;
}
.footer-map {
  display: flex; gap: 28px; align-items: center;
}
.footer-map a {
  position: relative; color: #f0f0ec; font-size: 12px; font-weight: 800; white-space: nowrap;
}
.footer-map a::after {
  position: absolute; right: 0; bottom: -7px; left: 0; height: 2px; content: ""; background: var(--lime);
  transform: scaleX(0); transition: transform .2s;
}
.footer-map a:hover {
  color: var(--lime);
}
.footer-map a:hover::after {
  transform: scaleX(1);
}
.footer-copyright {
  display: flex; align-items: center; justify-content: flex-end; margin: 0; color: #a9a9a1; font-size: 12px;
  text-align: right; white-space: nowrap;
}
.footer-copyright i {
  width: 3px; height: 3px; margin: 0 9px; border-radius: 50%; background: var(--lime);
}
@media (max-width:800px) {
  .shell {
    width: min(100% - 30px,590px);
}
  .nav-wrap {
    gap: 10px; height: 65px;
}
  .brand {
    font-size: 14px;
}
  .brand img {
    width: 37px; height: 37px;
}
  .desktop-nav {
    display: none;
}
  .nav-actions {
    margin-left: auto;
}
  .nav-download {
    padding: 9px 13px; font-size: 13px;
}
  .menu-toggle {
    display: block;
}
  .mobile-nav {
    padding: 10px 15px; border-top: 1px solid var(--line); background: var(--paper);
}
  .mobile-nav.is-open {
    display: grid; grid-template-columns: 1fr; gap: 6px;
}
  .mobile-nav a {
    padding: 9px; border: 1px solid var(--line); font-size: 13px; font-weight: 800;
}
  .hero {
    min-height: auto; padding: 103px 0 58px; background: linear-gradient(150deg,var(--paper) 0 62%,#e7edc9 62%);
}
  .hero::before {
    top: auto; width: 100%; height: 41%;
}
  .hero-layout {
    grid-template-columns: 1fr; gap: 36px;
}
  .hero-copy {
    text-align: center;
}
  .eyebrow {
    font-size: 10px;
}
  .hero h1 {
    margin-bottom: 19px; font-size: 51px; letter-spacing: -3px;
}
  .hero-intro {
    margin-right: auto; margin-left: auto; font-size: 15px; line-height: 1.9;
}
  .hero-actions,.hero-metrics {
    justify-content: center;
}
  .age-label {
    width: max-content; margin: 12px auto 0; text-align: center;
}
  .hero-metrics {
    gap: 19px; margin-top: 33px; text-align: left;
}
  .hero-metrics div {
    min-width: 78px;
}
  .hero-metrics dt {
    font-size: 17px;
}
  .device-stage {
    height: 490px;
}
  .phone {
    transform: scale(.92);
}
  .device-caption {
    right: 4px; bottom: -7px;
}
  .feature-section,.steps-section,.screens-section,.faq-section,.review-section {
    padding: 70px 0;
}
  .section-heading h2,.review-heading h2,.download-section h2 {
    letter-spacing: -2px;
}
  .feature-grid {
    grid-template-columns: repeat(2,1fr); margin-top: 35px;
}
  .feature-grid article {
    min-height: 225px; padding: 18px 15px; border-bottom: 1px solid var(--line);
}
  .feature-grid article:nth-child(3) {
    border-left: 1px solid var(--line);
}
  .feature-grid h3 {
    margin-top: 35px; font-size: 17px;
}
  .feature-grid p {
    font-size: 12px;
}
  .steps-layout,.faq-layout {
    grid-template-columns: 1fr; gap: 38px;
}
  .steps-list li {
    grid-template-columns: 47px 1fr;
}
  .steps-list h3 {
    font-size: 18px;
}
  .split-heading,.review-heading,.download-layout {
    display: block;
}
  .split-heading>p:not(.eyebrow),.review-heading>p {
    margin: 18px 0 0;
}
  .screens-scroll {
    margin-top: 31px; margin-right: -15px; padding-right: 15px; overflow-x: auto; overflow-y: hidden;
    -webkit-overflow-scrolling: touch; scroll-snap-type: x mandatory;
}
  .screens-grid {
    display: flex; gap: 12px; width: max-content;
}
  .screen-card {
    flex: 0 0 min(74vw,310px); width: min(74vw,310px); padding: 10px; scroll-snap-align: start;
}
  .faq-list button {
    padding: 18px 0; font-size: 15px;
}
  .review-grid {
    grid-template-columns: 1fr; gap: 11px; margin-top: 33px;
}
  .review-card {
    min-height: 0; padding: 20px 18px;
}
  .review-card>p {
    margin: 16px 0; font-size: 13px;
}
  .download-section {
    padding: 60px 0;
}
  .download-layout .button {
    margin-top: 27px;
}
  .back-to-top {
    right: 15px; bottom: 15px; width: 46px; height: 46px;
}
  .site-footer {
    padding: 24px 0;
  }
  .footer-layout {
    grid-template-columns: 1fr; gap: 20px; justify-items: center; text-align: center;
  }
  .footer-brand {
    justify-content: center;
  }
  .footer-map {
    display: flex; flex-wrap: wrap; justify-content: center; max-width: 280px; gap: 10px 18px;
  }
  .footer-copyright {
    justify-content: center; text-align: center; white-space: normal;
  }
  a,button {
    -webkit-tap-highlight-color: transparent;
}
  .nav-download:active,.button:active,.text-action:active,.mobile-nav a:active {
    opacity: 1;
}
  .mode-tab,.switch,.preset,.phone-start {
    touch-action: manipulation;
}
}
@media (max-width:390px) {
  .brand span {
    display: none;
}
  .hero h1 {
    font-size: 47px;
}
  .hero-metrics {
    gap: 13px;
}
  .hero-metrics div {
    min-width: 72px;
}
  .screen-card {
    flex-basis: 78vw; width: 78vw;
}
  .device-stage {
    margin-right: -13px; margin-left: -13px;
}
}