:root {
  --ink: #17142b;
  --muted: #69647f;
  --surface: #ffffff;
  --surface-soft: #f8f6ff;
  --line: #e8e3f5;
  --primary: #765be8;
  --primary-strong: #5f45d3;
  --pink: #ed83b8;
  --peach: #ffb49c;
  --success: #278a69;
  --shadow: 0 20px 60px rgba(74, 52, 134, .12);
  --shadow-soft: 0 10px 30px rgba(74, 52, 134, .08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --max: 1160px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fbfaff; font-family: "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
.shell { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid rgba(232,227,245,.75); background: rgba(251,250,255,.88); backdrop-filter: blur(18px); }
.nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: -.02em; }
.brand img { width: 40px; height: 40px; border-radius: 50%; box-shadow: 0 8px 18px rgba(118,91,232,.2); }
.brand small { display: block; margin-top: -3px; color: var(--muted); font-size: 11px; font-weight: 600; letter-spacing: .08em; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a { padding: 9px 13px; border-radius: 12px; color: var(--muted); font-size: 14px; font-weight: 700; transition: color 160ms ease-out, background-color 160ms ease-out, transform 120ms ease-out; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--primary-strong); background: #f0ecff; }
.nav-links a:active, .button:active { transform: scale(.98); }
.nav-toggle { display: none; border: 1px solid var(--line); border-radius: 12px; background: white; width: 42px; height: 42px; color: var(--ink); font-size: 20px; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 9px; padding: 0 20px; border: 0; border-radius: 14px; cursor: pointer; font: inherit; font-weight: 800; transition: transform 120ms ease-out, box-shadow 180ms ease-out, background-color 160ms ease-out; }
.button.primary { color: white; background: linear-gradient(135deg,var(--primary),#9a70eb 62%,var(--pink)); box-shadow: 0 13px 30px rgba(118,91,232,.28); }
.button.primary:hover { box-shadow: 0 16px 38px rgba(118,91,232,.36); }
.button.secondary { color: var(--primary-strong); background: white; border: 1px solid var(--line); box-shadow: var(--shadow-soft); }
.button.disabled, .button[aria-disabled="true"] { cursor: not-allowed; color: #8b859b; background: #ece9f3; box-shadow: none; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 18px; padding: 6px 11px; border: 1px solid #e5ddff; border-radius: 999px; color: var(--primary-strong); background: rgba(255,255,255,.78); font-size: 13px; font-weight: 800; }
.eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--pink); box-shadow: 0 0 0 5px rgba(237,131,184,.14); }
.hero { position: relative; overflow: hidden; padding: 92px 0 76px; }
.hero::before { content: ""; position: absolute; inset: -200px auto auto 50%; width: 860px; height: 620px; transform: translateX(-24%); border-radius: 50%; background: radial-gradient(circle,rgba(158,113,235,.2),rgba(237,131,184,.09) 46%,transparent 70%); pointer-events: none; }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 66px; }
h1 { margin: 0; max-width: 760px; font-size: clamp(42px,6vw,72px); line-height: 1.09; letter-spacing: -.055em; }
h1 span, .gradient-text { color: transparent; background: linear-gradient(110deg,var(--primary-strong),var(--primary),var(--pink)); -webkit-background-clip: text; background-clip: text; }
.hero-copy p { max-width: 640px; margin: 24px 0 30px; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-note { margin-top: 16px; color: var(--muted); font-size: 13px; }
.product-stage { position: relative; padding: 16px; border: 1px solid rgba(255,255,255,.8); border-radius: 34px; background: linear-gradient(145deg,rgba(255,255,255,.92),rgba(244,238,255,.82)); box-shadow: var(--shadow); transform: rotate(1.1deg); }
.product-stage::before, .product-stage::after { content: ""; position: absolute; z-index: -1; border-radius: 24px; }
.product-stage::before { inset: 40px -30px -28px 54px; background: #efe9ff; transform: rotate(3deg); }
.product-stage::after { width: 96px; height: 96px; right: -28px; top: -34px; background: linear-gradient(135deg,#ffd9e9,#dcd0ff); }
.product-stage img { width: 100%; border-radius: 20px; border: 1px solid #dcd5ed; box-shadow: 0 18px 42px rgba(38,27,78,.18); }
.trust-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.trust-row span { padding: 8px 12px; border-radius: 999px; color: #57516b; background: rgba(255,255,255,.8); border: 1px solid var(--line); font-size: 13px; font-weight: 700; }
.section { padding: 92px 0; }
.section.soft { background: linear-gradient(180deg,#f7f4ff,#fff9fd); border-block: 1px solid #eee8f8; }
.section-heading { max-width: 720px; margin-bottom: 38px; }
.section-heading.center { margin-inline: auto; text-align: center; }
.section-heading h2 { margin: 0 0 14px; font-size: clamp(32px,4vw,50px); line-height: 1.18; letter-spacing: -.04em; }
.section-heading p { margin: 0; color: var(--muted); font-size: 17px; }
.feature-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.feature-card { min-height: 230px; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: rgba(255,255,255,.9); box-shadow: var(--shadow-soft); transition: transform 180ms ease-out, box-shadow 180ms ease-out, border-color 180ms ease-out; }
.feature-card:hover { transform: translateY(-3px); border-color: #d9cdf7; box-shadow: var(--shadow); }
.feature-icon { display: grid; place-items: center; width: 46px; height: 46px; margin-bottom: 22px; border-radius: 14px; color: var(--primary-strong); background: linear-gradient(145deg,#eee9ff,#ffeaf5); font-size: 21px; font-weight: 900; }
.feature-card h3 { margin: 0 0 10px; font-size: 20px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }
.showcase { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 56px; }
.showcase + .showcase { margin-top: 82px; }
.showcase.reverse .showcase-media { order: 2; }
.showcase-media { padding: 12px; border: 1px solid var(--line); border-radius: 24px; background: white; box-shadow: var(--shadow); }
.showcase-media img { border-radius: 15px; }
.showcase-copy h3 { margin: 0 0 15px; font-size: clamp(28px,3vw,40px); letter-spacing: -.035em; }
.showcase-copy p { color: var(--muted); }
.check-list { display: grid; gap: 12px; margin: 24px 0 0; padding: 0; list-style: none; }
.check-list li { display: flex; gap: 11px; align-items: flex-start; }
.check-list li::before { content: "✓"; flex: 0 0 24px; display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; color: white; background: var(--success); font-size: 13px; font-weight: 900; }
.stat-strip { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; padding: 20px; border: 1px solid var(--line); border-radius: 22px; background: white; box-shadow: var(--shadow-soft); }
.stat { padding: 18px; text-align: center; border-radius: 16px; background: var(--surface-soft); }
.stat strong { display: block; color: var(--primary-strong); font-size: 28px; }
.stat span { color: var(--muted); font-size: 13px; }
.cta { position: relative; overflow: hidden; padding: 48px; border-radius: 30px; color: white; background: linear-gradient(125deg,#5f45d3,#8969e7 52%,#df75ac); box-shadow: 0 25px 60px rgba(95,69,211,.3); }
.cta::after { content: ""; position: absolute; width: 280px; height: 280px; right: -70px; top: -120px; border-radius: 50%; background: rgba(255,255,255,.12); }
.cta-inner { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.cta h2 { margin: 0 0 8px; font-size: clamp(28px,4vw,44px); }
.cta p { margin: 0; color: rgba(255,255,255,.8); }
.cta .button { color: var(--primary-strong); background: white; white-space: nowrap; }
.page-hero { padding: 76px 0 44px; text-align: center; }
.page-hero h1 { max-width: 900px; margin-inline: auto; font-size: clamp(40px,5.4vw,64px); }
.page-hero p { max-width: 720px; margin: 20px auto 0; color: var(--muted); font-size: 18px; }
.content-grid { display: grid; grid-template-columns: 260px 1fr; align-items: start; gap: 34px; }
.side-nav { position: sticky; top: 96px; display: grid; gap: 6px; padding: 14px; border: 1px solid var(--line); border-radius: 18px; background: white; }
.side-nav a { padding: 10px 12px; border-radius: 10px; color: var(--muted); font-weight: 700; font-size: 14px; }
.side-nav a:hover { color: var(--primary-strong); background: var(--surface-soft); }
.prose { min-width: 0; }
.prose section { scroll-margin-top: 100px; padding: 30px; border: 1px solid var(--line); border-radius: 22px; background: white; box-shadow: var(--shadow-soft); }
.prose section + section { margin-top: 18px; }
.prose h2 { margin: 0 0 12px; font-size: 28px; }
.prose h3 { margin: 24px 0 8px; }
.prose p, .prose li { color: var(--muted); }
.notice { margin: 18px 0; padding: 16px 18px; border-left: 4px solid var(--pink); border-radius: 12px; background: #fff3f8; color: #624656; }
.download-card { max-width: 820px; margin: 0 auto; padding: 36px; border: 1px solid var(--line); border-radius: 28px; background: white; box-shadow: var(--shadow); }
.download-top { display: flex; align-items: center; gap: 18px; }
.download-top img { width: 70px; height: 70px; border-radius: 50%; }
.download-top h2 { margin: 0; }
.download-meta { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin: 26px 0; }
.download-meta div { padding: 14px; border-radius: 14px; background: var(--surface-soft); }
.download-meta strong { display: block; }
.download-meta span { color: var(--muted); font-size: 13px; }
.site-footer { margin-top: 90px; border-top: 1px solid var(--line); background: white; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(2,1fr); gap: 34px; padding: 50px 0 34px; }
.footer-grid h4 { margin: 0 0 12px; }
.footer-grid p, .footer-grid a { color: var(--muted); font-size: 14px; }
.footer-links { display: grid; gap: 7px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding: 18px 0 26px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.toast { position: fixed; z-index: 50; left: 50%; bottom: 28px; max-width: min(420px,calc(100% - 32px)); padding: 13px 17px; transform: translate(-50%,20px); border-radius: 13px; color: white; background: #282435; box-shadow: 0 14px 36px rgba(25,20,44,.25); opacity: 0; pointer-events: none; transition: opacity 180ms ease-out, transform 180ms ease-out; }
.toast.show { opacity: 1; transform: translate(-50%,0); }
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 450ms ease-out, transform 450ms cubic-bezier(.22,1,.36,1); }
.reveal.visible { opacity: 1; transform: none; }
@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; inset: 68px 20px auto; padding: 12px; border: 1px solid var(--line); border-radius: 16px; background: white; box-shadow: var(--shadow); }
  .nav-links.open { display: grid; }
  .hero { padding-top: 60px; }
  .hero-grid, .showcase, .content-grid { grid-template-columns: 1fr; }
  .product-stage { margin-top: 8px; transform: none; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .showcase.reverse .showcase-media { order: initial; }
  .side-nav { position: static; grid-template-columns: repeat(2,1fr); }
  .cta-inner { align-items: flex-start; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .shell { width: min(calc(100% - 28px),var(--max)); }
  .hero { padding: 48px 0 58px; }
  h1 { font-size: 42px; }
  .hero-actions .button { width: 100%; }
  .feature-grid, .stat-strip, .download-meta { grid-template-columns: 1fr; }
  .section { padding: 68px 0; }
  .cta { padding: 32px 24px; }
  .download-card, .prose section { padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}