:root {
  --ink: #14211b;
  --ink-soft: #4f5d56;
  --cream: #f8f5ed;
  --paper: #fffdf8;
  --line: rgba(20, 33, 27, .12);
  --purple: #7652df;
  --purple-dark: #5133b6;
  --lime: #c8f33b;
  --lime-dark: #789b00;
  --shadow: 0 28px 80px rgba(47, 38, 24, .14);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--cream); font-family: var(--font); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; }
.shell { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.narrow { max-width: 850px; }
.center { text-align: center; }

.site-header { position: sticky; top: 0; z-index: 60; border-bottom: 1px solid rgba(20,33,27,.08); background: rgba(248,245,237,.82); backdrop-filter: blur(18px) saturate(160%); }
.nav-shell { min-height: 72px; display: flex; align-items: center; gap: 38px; }
.brand { display: inline-flex; align-items: center; gap: 11px; margin-right: auto; font-size: 22px; font-weight: 840; letter-spacing: -.04em; }
.brand img { width: 42px; height: 42px; border-radius: 12px; box-shadow: 0 5px 18px rgba(77,52,164,.16); }
.nav-shell nav { display: flex; gap: 28px; font-size: 14px; color: var(--ink-soft); }
.nav-shell nav a { transition: color .18s ease; }
.nav-shell nav a:hover { color: var(--purple-dark); }

.button { min-height: 50px; padding: 0 23px; border: 1px solid var(--line); border-radius: 999px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; font-size: 15px; font-weight: 720; white-space: nowrap; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button-small { min-height: 42px; padding: 0 18px; font-size: 14px; }
.button-large { min-height: 58px; padding: 0 29px; font-size: 17px; }
.button-primary { color: #fff; border-color: transparent; background: linear-gradient(135deg, var(--purple), var(--purple-dark)); box-shadow: 0 12px 30px rgba(92,57,191,.25); }
.button-primary:hover { box-shadow: 0 17px 36px rgba(92,57,191,.34); }
.button-ghost { background: rgba(255,255,255,.56); }
.android-mark { width: 24px; height: 24px; display: inline-grid; place-items: center; color: var(--purple-dark); background: var(--lime); border-radius: 7px; font-size: 13px; font-weight: 900; }

.hero { position: relative; overflow: hidden; min-height: 780px; padding: 88px 0 82px; background: radial-gradient(circle at 48% 18%, rgba(255,255,255,.96), rgba(248,245,237,.7) 46%, var(--cream) 75%); }
.hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 72px; }
.hero-copy { padding-top: 14px; }
.overline, .section-kicker { color: var(--purple-dark); font-size: 12px; font-weight: 820; letter-spacing: .13em; text-transform: uppercase; }
.overline { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 24px; padding: 8px 13px; border: 1px solid rgba(81,51,182,.16); border-radius: 999px; background: rgba(255,255,255,.55); }
.overline span { width: 7px; height: 7px; border-radius: 50%; background: var(--lime-dark); box-shadow: 0 0 0 5px rgba(200,243,59,.28); }
.hero h1 { margin: 0; font-size: clamp(48px, 6.1vw, 78px); line-height: 1.05; letter-spacing: -.065em; font-weight: 860; }
.hero h1 em { color: var(--purple); font-style: normal; }
.hero-lead { max-width: 660px; margin: 27px 0 0; color: var(--ink-soft); font-size: 18px; line-height: 1.86; }
.hero-actions { display: flex; gap: 13px; flex-wrap: wrap; margin-top: 34px; }
.release-line { display: flex; align-items: center; gap: 9px; margin: 23px 0 0; color: #68736d; font-size: 13px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #7eaa00; box-shadow: 0 0 0 5px rgba(200,243,59,.24); }
.hero-stage { position: relative; min-height: 615px; display: grid; place-items: center; }
.phone { position: relative; padding: 10px; background: #191d1b; border: 1px solid rgba(255,255,255,.4); border-radius: 45px; box-shadow: var(--shadow); overflow: hidden; }
.phone img { width: 100%; height: 100%; object-fit: cover; border-radius: 36px; }
.phone-speaker { position: absolute; z-index: 3; width: 74px; height: 20px; left: 50%; top: 17px; transform: translateX(-50%); border-radius: 999px; background: #090b0a; box-shadow: 0 1px 0 rgba(255,255,255,.14) inset; }
.phone-hero { z-index: 3; width: 300px; height: 650px; transform: rotate(3deg); }
.orbit { position: absolute; border: 1px solid rgba(105,78,186,.16); border-radius: 50%; }
.orbit-one { width: 540px; height: 540px; }
.orbit-two { width: 425px; height: 425px; border-color: rgba(120,155,0,.2); }
.hero-glow { position: absolute; filter: blur(4px); border-radius: 50%; }
.hero-glow-purple { width: 420px; height: 420px; right: -150px; top: 40px; background: rgba(118,82,223,.13); }
.hero-glow-lime { width: 350px; height: 350px; left: 44%; bottom: -180px; background: rgba(200,243,59,.24); }
.float-card { position: absolute; z-index: 5; display: flex; flex-direction: column; padding: 13px 17px; border: 1px solid rgba(255,255,255,.82); border-radius: 17px; background: rgba(255,255,255,.76); backdrop-filter: blur(18px); box-shadow: 0 16px 35px rgba(45,38,30,.14); }
.float-card b { font-size: 23px; line-height: 1; }
.float-card span { margin-top: 5px; color: var(--ink-soft); font-size: 11px; }
.float-card-one { left: 4px; top: 118px; }
.float-card-two { right: -5px; bottom: 104px; }

.proof-strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.55); }
.proof-grid { display: grid; grid-template-columns: repeat(4,1fr); }
.proof-grid div { min-height: 112px; padding: 25px 28px; display: flex; flex-direction: column; justify-content: center; border-right: 1px solid var(--line); }
.proof-grid div:last-child { border: 0; }
.proof-grid b { font-size: 15px; }
.proof-grid span { margin-top: 5px; color: var(--ink-soft); font-size: 12px; line-height: 1.55; }

.section { padding: 112px 0; }
.section-kicker { margin: 0 0 17px; }
.philosophy h2, .section-heading h2, .download-copy h2, .closing h2 { margin: 0; font-size: clamp(35px, 4.6vw, 58px); line-height: 1.16; letter-spacing: -.045em; }
.section-intro { margin: 28px auto 0; color: var(--ink-soft); font-size: 17px; line-height: 1.95; }
.concept-line { margin: 42px auto 0; display: flex; align-items: center; justify-content: center; gap: 16px; color: var(--purple-dark); font-size: 12px; font-weight: 780; letter-spacing: .08em; text-transform: uppercase; }
.concept-line i { width: 42px; height: 1px; background: linear-gradient(90deg, var(--purple), var(--lime-dark)); }

.showcase { background: var(--ink); color: #fff; overflow: hidden; }
.split-heading { display: grid; grid-template-columns: 1.2fr .8fr; gap: 70px; align-items: end; }
.split-heading .section-kicker { color: var(--lime); }
.split-heading > p { margin: 0 0 5px; color: rgba(255,255,255,.62); font-size: 16px; line-height: 1.85; }
.feature-story { margin-top: 76px; display: grid; grid-template-columns: .85fr 1.15fr; gap: 95px; align-items: center; }
.phone-reading { width: min(390px,100%); height: auto; aspect-ratio: 780/1688; margin: 0 auto; background: #101411; box-shadow: 0 35px 95px rgba(0,0,0,.52), 0 0 0 1px rgba(200,243,59,.14); }
.story-copy { border-top: 1px solid rgba(255,255,255,.15); }
.story-copy article { position: relative; padding: 31px 0 31px 58px; border-bottom: 1px solid rgba(255,255,255,.15); }
.story-number { position: absolute; left: 0; top: 34px; color: var(--lime); font-size: 12px; font-weight: 800; }
.story-copy h3 { margin: 0 0 10px; font-size: 24px; letter-spacing: -.02em; }
.story-copy p { margin: 0; color: rgba(255,255,255,.58); line-height: 1.8; }

.feature-section { background: var(--paper); }
.center-heading { max-width: 720px; margin: 0 auto; text-align: center; }
.center-heading > p:last-child { color: var(--ink-soft); font-size: 17px; line-height: 1.8; }
.experience-grid { margin-top: 62px; display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.experience-card { height: 650px; position: relative; overflow: hidden; border: 1px solid var(--line); border-radius: 34px; padding: 38px; background: #f4f0ff; }
.card-discover { background: #eff7d8; }
.card-copy { position: relative; z-index: 4; max-width: 390px; }
.card-copy span { color: var(--purple-dark); font-size: 12px; font-weight: 800; letter-spacing: .1em; }
.card-copy h3 { margin: 12px 0 10px; font-size: 29px; letter-spacing: -.035em; }
.card-copy p { margin: 0; color: var(--ink-soft); line-height: 1.75; }
.mini-phone { position: absolute; width: 280px; height: 606px; padding: 8px; left: 50%; top: 218px; transform: translateX(-50%); background: #171b18; border-radius: 37px; box-shadow: 0 25px 55px rgba(38,35,31,.22); }
.mini-phone img { width: 100%; height: 100%; object-fit: cover; border-radius: 30px; }
.capability-grid { margin-top: 22px; display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
.capability-grid article { padding: 26px; border: 1px solid var(--line); border-radius: 24px; background: #fff; }
.cap-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; color: #fff; background: var(--purple); font-size: 13px; font-weight: 850; }
.capability-grid article:nth-child(2n) .cap-icon { color: var(--ink); background: var(--lime); }
.capability-grid h3 { margin: 20px 0 9px; font-size: 17px; }
.capability-grid p { margin: 0; color: var(--ink-soft); font-size: 13px; line-height: 1.7; }

.download-section { position: relative; overflow: hidden; color: #fff; background: linear-gradient(135deg,#6f4ad7 0%,#4d2ba8 62%,#32177f 100%); }
.download-section::before { content: ""; position: absolute; width: 520px; height: 520px; right: -170px; bottom: -260px; border-radius: 50%; background: var(--lime); opacity: .87; }
.download-shell { position: relative; z-index: 2; display: grid; grid-template-columns: 1.15fr .85fr; gap: 80px; align-items: center; }
.download-copy .section-kicker { color: var(--lime); }
.download-copy > p:not(.section-kicker) { max-width: 650px; color: rgba(255,255,255,.72); font-size: 17px; line-height: 1.84; }
.download-actions { margin-top: 30px; display: flex; gap: 17px; align-items: center; flex-wrap: wrap; }
.download-actions .button-primary { color: var(--ink); background: var(--lime); box-shadow: 0 16px 38px rgba(25,13,71,.3); }
.download-actions .android-mark { color: #fff; background: var(--purple-dark); }
.ios-soon { color: rgba(255,255,255,.7); font-size: 14px; }
.build-meta { margin: 30px 0 0; display: flex; gap: 34px; }
.build-meta div { display: flex; flex-direction: column; }
.build-meta dt { color: rgba(255,255,255,.48); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }
.build-meta dd { margin: 5px 0 0; font-size: 14px; font-weight: 700; }
.install-note { max-width: 690px; margin-top: 28px; border-top: 1px solid rgba(255,255,255,.18); border-bottom: 1px solid rgba(255,255,255,.18); }
.install-note summary { padding: 15px 0; cursor: pointer; font-size: 14px; font-weight: 700; }
.install-note p { margin: 0 0 17px; color: rgba(255,255,255,.65); font-size: 13px; line-height: 1.75; }
.download-art { position: relative; text-align: center; }
.app-icon-large { width: 260px; height: 260px; margin: 0 auto; padding: 8px; border-radius: 60px; background: rgba(255,255,255,.16); box-shadow: 0 35px 75px rgba(28,12,77,.34); transform: rotate(3deg); }
.app-icon-large img { border-radius: 53px; }
.download-wordmark { margin-top: 28px; font-size: 52px; font-weight: 880; letter-spacing: -.05em; }
.download-art p { margin: 4px 0 0; color: rgba(255,255,255,.58); font-size: 14px; letter-spacing: .08em; }

.closing { padding: 116px 0; background: var(--cream); }
.closing > .shell { max-width: 850px; }
.closing p { margin: 0 0 18px; color: var(--purple); font-size: 13px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.text-link { display: inline-flex; gap: 9px; margin-top: 32px; color: var(--purple-dark); font-weight: 760; }

footer { padding: 32px 0 42px; border-top: 1px solid var(--line); background: var(--cream); }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 24px 40px; align-items: center; }
.footer-brand { display: flex; align-items: center; gap: 11px; }
.footer-brand img { border-radius: 9px; }
.footer-brand div { display: flex; flex-direction: column; }
.footer-brand b { font-size: 15px; }
.footer-brand span { margin-top: 2px; color: var(--ink-soft); font-size: 11px; }
.footer-links { display: flex; gap: 20px; color: var(--ink-soft); font-size: 12px; }
.beian { grid-column: 1/-1; display: flex; gap: 16px; color: #7a847e; font-size: 11px; }
.beian[hidden], #policeBeian[hidden] { display: none; }
#policeBeian { display: inline-flex; align-items: center; }
#policeBeian img { width: 14px; height: 14px; margin-right: 5px; }

@media (max-width: 920px) {
  .nav-shell nav { display: none; }
  .hero { padding-top: 58px; }
  .hero-grid, .download-shell { grid-template-columns: 1fr; }
  .hero-copy { text-align: center; }
  .hero-lead { margin-left: auto; margin-right: auto; }
  .hero-actions, .release-line { justify-content: center; }
  .hero-stage { margin-top: 18px; }
  .proof-grid { grid-template-columns: 1fr 1fr; }
  .proof-grid div:nth-child(2) { border-right: 0; }
  .proof-grid div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .split-heading, .feature-story { grid-template-columns: 1fr; gap: 44px; }
  .split-heading > p { max-width: 680px; }
  .capability-grid { grid-template-columns: 1fr 1fr; }
  .download-art { display: none; }
}

@media (max-width: 680px) {
  .shell { width: min(100% - 32px,1180px); }
  .site-header .button-small { padding: 0 14px; }
  .brand { font-size: 20px; }
  .brand img { width: 38px; height: 38px; }
  .hero { min-height: auto; padding: 46px 0 66px; }
  .hero h1 { font-size: clamp(42px,13vw,61px); }
  .hero-lead { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .release-line { align-items: flex-start; line-height: 1.6; }
  .hero-stage { min-height: 530px; }
  .phone-hero { width: 245px; height: 531px; }
  .phone { border-radius: 38px; }
  .phone img { border-radius: 30px; }
  .orbit-one { width: 420px; height: 420px; }
  .orbit-two { width: 330px; height: 330px; }
  .float-card-one { left: -4px; }
  .float-card-two { right: -3px; bottom: 54px; }
  .section { padding: 82px 0; }
  .philosophy h2, .section-heading h2, .download-copy h2, .closing h2 { font-size: 35px; }
  .concept-line { gap: 8px; font-size: 9px; }
  .concept-line i { width: 20px; }
  .experience-grid { grid-template-columns: 1fr; }
  .experience-card { height: 600px; padding: 29px; border-radius: 26px; }
  .mini-phone { top: 205px; width: 255px; height: 552px; }
  .capability-grid { grid-template-columns: 1fr; }
  .build-meta { gap: 22px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-links, .beian { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}