@font-face {
  font-family: "Alibaba PuHuiTi";
  src: url("/fonts/Alibaba-PuHuiTi-Regular.woff") format("woff");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Alibaba PuHuiTi";
  src: url("/fonts/Alibaba-PuHuiTi-Bold.woff") format("woff");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

:root {
  --ink: #10131a;
  --muted: #687081;
  --line: #e6e9ef;
  --paper: #f7f8fb;
  --blue: #3155eb;
  --blue-dark: #1e36ac;
  --lavender: #7a63ee;
  --white: #fff;
  --radius-lg: 28px;
  --shadow: 0 28px 70px rgba(36, 47, 78, .14);
}

* { box-sizing: border-box; }
html { overflow-x: hidden; scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: "Alibaba PuHuiTi", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  line-height: 1.5;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.section-shell { width: min(1180px, calc(100% - 64px)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  width: min(1240px, calc(100% - 40px));
  height: 76px;
  margin: 16px auto 0;
  padding: 0 18px 0 22px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border: 1px solid rgba(225, 228, 237, .88);
  border-radius: 20px;
  background: rgba(255, 255, 255, .82);
  box-shadow: 0 12px 35px rgba(30, 40, 72, .07);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; letter-spacing: -.01em; }
.brand img { display: block; }
.site-nav { display: flex; gap: 38px; color: #4e5564; font-size: 14px; }
.site-nav a { transition: color .2s ease; }
.site-nav a:hover { color: var(--blue); }
.header-download { justify-self: end; padding: 12px 20px; color: var(--white); background: var(--ink); border-radius: 12px; font-size: 14px; font-weight: 500; transition: transform .2s ease, background .2s ease; }
.header-download:hover { transform: translateY(-2px); background: var(--blue); }

.hero {
  min-height: 720px;
  padding: 94px 0 86px;
  display: grid;
  grid-template-columns: .93fr 1.07fr;
  gap: 64px;
  align-items: center;
}
.eyebrow { margin: 0 0 22px; display: flex; align-items: center; gap: 10px; color: var(--blue); font-size: 13px; font-weight: 700; letter-spacing: .09em; }
.eyebrow > span { width: 24px; height: 2px; background: currentColor; }
.hero h1 { margin: 0; font-size: clamp(56px, 6.1vw, 84px); line-height: 1.09; letter-spacing: -.025em; font-weight: 700; }
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-description { max-width: 590px; margin: 28px 0 0; color: var(--muted); font-size: 18px; line-height: 1.78; }
.hero-actions { margin-top: 40px; display: flex; align-items: center; gap: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 24px; min-height: 56px; padding: 0 24px; border-radius: 14px; font-size: 15px; font-weight: 500; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button-primary { color: white; background: var(--blue); box-shadow: 0 16px 30px rgba(49, 85, 235, .24); }
.button-primary:hover { transform: translateY(-2px); background: #2749d5; box-shadow: 0 18px 38px rgba(49, 85, 235, .3); }
.text-link { padding: 14px 0; font-size: 15px; font-weight: 500; }
.text-link span { margin-left: 10px; transition: margin .2s ease; }
.text-link:hover span { margin-left: 15px; }
.hero-meta { margin: 22px 0 0; display: flex; align-items: center; color: #858b98; font-size: 12px; }
.status-dot { width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: #27bd7a; box-shadow: 0 0 0 4px rgba(39, 189, 122, .12); }

.hero-visual { position: relative; min-height: 510px; display: grid; place-items: center; }
.hero-visual::before { content: ""; position: absolute; inset: 0 1% 0 5%; border-radius: 50%; background: radial-gradient(circle at center, rgba(92, 107, 238, .16), rgba(139, 103, 236, .04) 47%, transparent 69%); filter: blur(4px); }
.orbit { position: absolute; border: 1px solid rgba(73, 92, 195, .13); border-radius: 50%; transform: rotate(-17deg); }
.orbit-one { width: 540px; height: 270px; }
.orbit-two { width: 430px; height: 430px; }
.app-window { position: relative; z-index: 2; width: min(100%, 520px); overflow: hidden; border: 1px solid rgba(210, 215, 229, .9); border-radius: 26px; background: rgba(255,255,255,.92); box-shadow: var(--shadow); transform: rotate(1.5deg); }
.window-topbar { height: 60px; padding: 0 21px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid #eff1f5; }
.mini-brand { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; }
.window-dots { display: flex; gap: 6px; }
.window-dots i { width: 6px; height: 6px; border-radius: 50%; background: #d5d9e4; }
.window-content { padding: 24px; }
.device-card { padding: 24px; border-radius: 18px; color: white; background: linear-gradient(135deg, #2039bd 0%, #425de7 62%, #7867e8 100%); box-shadow: 0 18px 34px rgba(56, 78, 202, .23); }
.card-label { display: block; margin-bottom: 10px; color: rgba(255,255,255,.7); font-size: 12px; }
.device-card strong { font-size: 31px; letter-spacing: .09em; }
.online-state { margin-top: 22px; display: flex; align-items: center; gap: 8px; color: rgba(255,255,255,.84); font-size: 12px; }
.online-state span { width: 7px; height: 7px; border-radius: 50%; background: #7df1b8; }
.connect-card { margin-top: 14px; padding: 19px; border: 1px solid #e9ecf3; border-radius: 17px; background: white; }
.connect-card .card-label { color: #8b91a0; }
.device-input { height: 48px; padding: 0 8px 0 15px; display: flex; align-items: center; justify-content: space-between; border-radius: 12px; color: #a1a6b2; background: #f5f6f9; font-size: 12px; }
.device-input b { width: 35px; height: 35px; display: grid; place-items: center; border-radius: 10px; color: white; background: var(--ink); font-size: 16px; }
.quick-row { margin-top: 17px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.quick-row div { min-height: 70px; padding: 12px 8px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; border-radius: 14px; background: #f7f8fa; color: #767d8d; font-size: 11px; }
.quick-row b { color: var(--blue); font-size: 17px; }
.connection-pill { position: absolute; z-index: 3; right: -8px; bottom: 54px; padding: 13px 17px; display: flex; align-items: center; gap: 9px; border: 1px solid white; border-radius: 14px; background: rgba(255,255,255,.9); box-shadow: 0 16px 35px rgba(31, 43, 78, .13); backdrop-filter: blur(12px); color: #555d6d; font-size: 12px; font-weight: 500; }
.connection-pill span { width: 8px; height: 8px; border-radius: 50%; background: #24bd79; box-shadow: 0 0 0 5px rgba(36, 189, 121, .12); }

.trust-strip { padding: 30px max(32px, calc((100vw - 1180px)/2)); display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); background: rgba(255,255,255,.55); }
.trust-strip div { padding: 6px 28px; border-right: 1px solid var(--line); }
.trust-strip div:first-child { padding-left: 0; }
.trust-strip div:last-child { border-right: 0; }
.trust-strip strong, .trust-strip span { display: block; }
.trust-strip strong { margin-bottom: 5px; font-size: 16px; }
.trust-strip span { color: var(--muted); font-size: 13px; }

.product-showcase { padding-top: 126px; }
.showcase-heading { display: grid; grid-template-columns: 1fr .72fr; gap: 90px; align-items: end; }
.showcase-heading h2 { margin: 0; font-size: clamp(40px, 4.6vw, 58px); line-height: 1.17; letter-spacing: -.02em; }
.showcase-heading > p { margin: 0 0 5px; color: var(--muted); font-size: 16px; line-height: 1.76; }
.product-frame { position: relative; margin: 62px 0 0; padding: 13px; border: 1px solid #dfe3eb; border-radius: 30px; background: #fff; box-shadow: 0 34px 85px rgba(24, 36, 72, .15); }
.product-frame::before { content: ""; position: absolute; inset: -40px 8% auto; height: 150px; z-index: -1; border-radius: 50%; background: rgba(63, 86, 229, .16); filter: blur(55px); }
.product-frame img { position: relative; z-index: 1; width: 100%; height: auto; display: block; border-radius: 20px; background: #0d1625; }
.product-frame figcaption { padding: 17px 9px 5px; display: flex; align-items: center; justify-content: space-between; color: #858c9a; font-size: 12px; }
.product-frame figcaption span:first-child { display: inline-flex; align-items: center; gap: 8px; color: #555d6d; font-weight: 500; }
.product-frame figcaption i { width: 7px; height: 7px; border-radius: 50%; background: #28bd7b; box-shadow: 0 0 0 4px rgba(40,189,123,.12); }
.frame-glow { position: absolute; width: 350px; height: 350px; right: -60px; top: -80px; z-index: -1; border-radius: 50%; background: rgba(123, 98, 236, .1); filter: blur(55px); }

.features { padding-block: 126px; }
.section-heading { display: grid; grid-template-columns: .75fr 1fr; align-items: end; column-gap: 70px; }
.section-heading .eyebrow { grid-column: 1 / -1; }
.section-heading h2 { margin: 0; font-size: clamp(40px, 4.6vw, 58px); line-height: 1.17; letter-spacing: -.02em; }
.section-heading > p:last-child { margin: 0 0 4px; max-width: 500px; color: var(--muted); font-size: 16px; line-height: 1.76; }
.feature-grid { margin-top: 64px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.feature-card { position: relative; min-height: 310px; padding: 35px; overflow: hidden; border: 1px solid #e5e8ef; border-radius: var(--radius-lg); background: rgba(255,255,255,.72); }
.feature-icon { width: 44px; height: 44px; margin-bottom: 42px; display: grid; place-items: center; border-radius: 13px; color: var(--blue); background: #edf0ff; font-size: 21px; font-weight: 800; }
.feature-card h3 { margin: 0 0 13px; font-size: 23px; letter-spacing: -.01em; }
.feature-card p { max-width: 410px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.75; }
.dark-card { color: white; background: #141822; border-color: #141822; }
.dark-card .feature-icon { color: white; background: rgba(255,255,255,.1); }
.dark-card p { color: #a8afbd; }
.feature-large { display: flex; flex-direction: column; justify-content: space-between; }
.radar { position: absolute; right: -30px; top: -30px; width: 260px; height: 260px; }
.radar i { position: absolute; inset: 50%; border: 1px solid rgba(49, 85, 235, .13); border-radius: 50%; transform: translate(-50%,-50%); }
.radar i:nth-child(1) { width: 70px; height: 70px; }
.radar i:nth-child(2) { width: 140px; height: 140px; }
.radar i:nth-child(3) { width: 220px; height: 220px; }
.radar b { position: absolute; left: 50%; top: 50%; width: 11px; height: 11px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 8px rgba(49, 85, 235, .12); }
.wide-card { grid-column: 1 / -1; min-height: 330px; display: grid; grid-template-columns: 1fr 1.1fr; align-items: center; }
.wide-copy .feature-icon { margin-bottom: 32px; }
.role-switch { display: grid; grid-template-columns: 1fr 74px 1fr; align-items: center; }
.role { padding: 24px; border: 1px solid #e5e9f0; border-radius: 18px; background: #f8f9fb; }
.role span, .role b { display: block; }
.role span { margin-bottom: 24px; color: #777f8f; font-size: 12px; }
.role b { font-size: 16px; }
.role.active { color: white; background: var(--blue); border-color: var(--blue); box-shadow: 0 18px 35px rgba(49,85,235,.23); }
.role.active span { color: rgba(255,255,255,.7); }
.switch-line { height: 1px; background: #d8dce5; position: relative; }
.switch-line i { position: absolute; left: 50%; top: 50%; width: 26px; height: 26px; border: 1px solid #d8dce5; border-radius: 50%; background: white; transform: translate(-50%,-50%); }

.steps { padding: 30px 0 128px; }
.section-heading.centered { display: block; text-align: center; }
.section-heading.centered .eyebrow { justify-content: center; }
.steps-list { margin: 65px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); list-style: none; }
.steps-list li { min-height: 165px; padding: 0 40px; display: flex; gap: 25px; border-right: 1px solid var(--line); }
.steps-list li:first-child { padding-left: 0; }
.steps-list li:last-child { border: 0; padding-right: 0; }
.steps-list > li > span { color: var(--blue); font-size: 13px; font-weight: 700; }
.steps-list h3 { margin: 0 0 14px; font-size: 20px; }
.steps-list p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.72; }

.download-section { position: relative; overflow: hidden; color: white; background: #151a27; }
.download-section::before { content: ""; position: absolute; width: 780px; height: 780px; right: -210px; top: -380px; border: 1px solid rgba(116, 130, 231, .23); border-radius: 50%; box-shadow: 0 0 0 90px rgba(78, 94, 212, .035), 0 0 0 180px rgba(78, 94, 212, .025); }
.download-inner { position: relative; z-index: 1; min-height: 560px; padding-block: 94px; display: grid; grid-template-columns: 1fr .84fr; gap: 90px; align-items: center; }
.eyebrow.light { color: #8ca1ff; }
.download-copy h2 { margin: 0; font-size: clamp(42px, 4.6vw, 58px); line-height: 1.18; letter-spacing: -.02em; }
.download-copy > p:not(.eyebrow) { margin: 24px 0 0; color: #a7afc0; font-size: 16px; }
.version-line { margin-top: 45px; color: #717b90; font-size: 12px; }
.version-separator { margin: 0 10px; }
.download-cards { display: flex; flex-direction: column; gap: 12px; }
.download-card { width: 100%; min-height: 98px; padding: 0 22px; display: grid; grid-template-columns: 50px 1fr auto; gap: 18px; align-items: center; color: inherit; border: 1px solid rgba(255,255,255,.11); border-radius: 19px; background: rgba(255,255,255,.065); font: inherit; text-align: left; cursor: pointer; transition: background .2s ease, transform .2s ease, border .2s ease; }
.download-card:hover { transform: translateX(4px); background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.2); }
.download-card.is-disabled { opacity: .42; cursor: not-allowed; }
.download-card.is-disabled:hover { transform: none; }
.download-card.is-resolving { cursor: wait; }
.download-card strong, .download-card span { display: block; }
.download-card strong { margin-bottom: 6px; font-size: 16px; }
.download-card span { color: #8d96a8; font-size: 12px; }
.download-card > b { width: 35px; height: 35px; display: grid; place-items: center; border-radius: 10px; background: rgba(255,255,255,.08); color: #f5f7ff; }
.platform-icon { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 14px; background: rgba(255,255,255,.09); color: #f5f7ff; }
.platform-icon svg { width: 24px; height: 24px; display: block; fill: currentColor; }
.download-arrow svg { width: 18px; height: 18px; display: block; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.download-card:not(.is-disabled):hover .platform-icon { color: #aebcff; background: rgba(104, 124, 255, .15); }
.download-status { margin: 8px 2px 0; color: #788196; font-size: 12px; }

.site-footer { min-height: 120px; padding: 34px max(32px, calc((100vw - 1180px)/2)); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; color: #7d8492; background: #0e121b; border-top: 1px solid rgba(255,255,255,.06); font-size: 13px; }
.footer-brand { color: white; font-size: 17px; }
.footer-legal { justify-self: end; display: grid; justify-items: end; gap: 8px; }
.footer-legal p { margin: 0; }
.police-filing { display: inline-flex; align-items: center; gap: 7px; color: #7d8492; transition: color .2s ease; }
.police-filing:hover { color: #cbd2df; }
.police-filing img { width: 20px; height: 20px; object-fit: contain; }

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-nav { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 74px; }
  .hero-copy { text-align: center; }
  .hero .eyebrow, .hero-actions, .hero-meta { justify-content: center; }
  .hero-description { margin-inline: auto; }
  .hero-visual { min-height: 540px; }
  .showcase-heading { grid-template-columns: 1fr; gap: 24px; }
  .section-heading { grid-template-columns: 1fr; gap: 24px; }
  .download-inner { grid-template-columns: 1fr; gap: 55px; }
}

@media (max-width: 720px) {
  .section-shell { width: min(100% - 36px, 1180px); }
  .site-header { width: calc(100% - 24px); height: 66px; margin-top: 10px; padding-inline: 14px 12px; border-radius: 17px; }
  .brand { font-size: 18px; }
  .brand img { width: 32px; height: 32px; }
  .header-download { padding: 10px 14px; }
  .hero { padding: 68px 0 55px; gap: 48px; }
  .hero h1 { font-size: clamp(49px, 14.5vw, 64px); }
  .hero-description { font-size: 16px; line-height: 1.75; }
  .hero-actions { flex-direction: column; gap: 10px; }
  .hero-meta { flex-wrap: wrap; line-height: 1.7; }
  .hero-visual { min-height: 390px; }
  .app-window { width: calc(100% - 12px); border-radius: 21px; }
  .window-content { padding: 17px; }
  .device-card { padding: 20px; }
  .device-card strong { font-size: 24px; }
  .orbit-one { width: 360px; height: 190px; }
  .orbit-two { width: 320px; height: 320px; }
  .connection-pill { right: 0; bottom: 5px; }
  .trust-strip { grid-template-columns: repeat(2, 1fr); padding: 20px 18px; }
  .trust-strip div { padding: 14px 18px; }
  .trust-strip div:nth-child(2) { border-right: 0; }
  .trust-strip div:nth-child(3), .trust-strip div:nth-child(4) { border-top: 1px solid var(--line); }
  .trust-strip div:first-child { padding-left: 18px; }
  .product-showcase { padding-top: 88px; }
  .showcase-heading h2 { font-size: 40px; }
  .product-frame { margin-top: 42px; padding: 7px; border-radius: 20px; }
  .product-frame img { border-radius: 14px; }
  .product-frame figcaption { padding: 13px 5px 4px; }
  .features { padding-block: 88px; }
  .section-heading h2, .download-copy h2 { font-size: 40px; }
  .feature-grid { margin-top: 45px; grid-template-columns: 1fr; }
  .feature-card, .wide-card { grid-column: auto; min-height: 280px; padding: 27px; }
  .wide-card { grid-template-columns: 1fr; gap: 36px; }
  .radar { right: -80px; }
  .steps { padding-bottom: 88px; }
  .steps-list { margin-top: 44px; grid-template-columns: 1fr; }
  .steps-list li { min-height: 120px; padding: 25px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .download-inner { padding-block: 74px; }
  .download-card { padding-inline: 15px; grid-template-columns: 46px 1fr auto; gap: 12px; }
  .platform-icon { width: 44px; height: 44px; }
  .site-footer { padding-block: 34px; grid-template-columns: 1fr; gap: 17px; text-align: center; }
  .site-footer > * { justify-self: center !important; margin: 0; }
  .footer-legal { justify-items: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}