:root{
  --blue:#2e6df6; --purple:#7b3fe4; --teal:#00bfa6; --ink:#101828; --muted:#5a6b7b;
  --bg:#ffffff; --bg2:#f6f8fd; --card:#ffffff; --line:#e7edf6;
  --grad:linear-gradient(120deg,#2e6df6,#7b3fe4);
  --shadow:0 18px 50px rgba(46,77,140,.12);
  --radius:18px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;color-scheme:light}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* NAV */
.nav{
  position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:20px;
  padding:14px 28px;background:color-mix(in srgb,var(--bg) 82%,transparent);
  backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line);
}
.nav-brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:18px}
.nav-links{display:flex;gap:24px;margin-left:auto;font-size:15px;color:var(--muted)}
.nav-links a:hover{color:var(--ink)}
.nav .btn{margin-left:8px}

/* BUTTONS */
.btn{display:inline-block;border-radius:12px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:transform .15s ease,box-shadow .15s ease,background .15s}
.btn-sm{padding:8px 16px;font-size:14px}
.btn-lg{padding:14px 26px;font-size:16px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(10,132,255,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(10,132,255,.36)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{background:var(--bg2);transform:translateY(-2px)}

/* HERO */
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;max-width:1120px;margin:0 auto;padding:72px 28px 40px}
.hero-logo{width:200px;max-width:60%;height:auto;margin-bottom:22px;display:block}
.badge-row{display:flex;gap:10px;margin-bottom:18px;flex-wrap:wrap}
.pill{font-size:13px;font-weight:600;color:var(--blue);background:color-mix(in srgb,var(--blue) 12%,transparent);padding:6px 13px;border-radius:999px}
.hero h1{font-size:clamp(34px,5vw,56px);line-height:1.07;letter-spacing:-.02em;font-weight:800}
.lead{font-size:18px;color:var(--muted);margin:20px 0 28px;max-width:520px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.fine{font-size:13px;color:var(--muted);margin-top:14px}

/* HERO ART */
.hero-art{position:relative;display:flex;justify-content:center}
.mock-window{width:100%;max-width:420px;background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.mock-bar{display:flex;gap:7px;padding:13px 15px;border-bottom:1px solid var(--line)}
.mock-bar span{width:11px;height:11px;border-radius:50%;background:var(--line)}
.mock-bar span:first-child{background:#ff5f57}.mock-bar span:nth-child(2){background:#febc2e}.mock-bar span:nth-child(3){background:#28c840}
.mock-body{padding:22px}
.mock-label{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:5px}
.mock-zh{font-size:21px;font-weight:600}
.mock-py{color:var(--teal);font-size:15px;margin-top:3px}
.mock-divider{height:1px;background:var(--line);margin:16px 0}
.mock-en{font-size:18px;font-weight:600}
.float-icon{position:absolute;top:-26px;right:0;animation:float 4s ease-in-out infinite;filter:drop-shadow(0 10px 24px rgba(123,63,228,.25))}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* Hero value tagline */
.hero-tagline{font-size:clamp(18px,2.3vw,23px);font-weight:700;line-height:1.35;margin:18px 0 4px;max-width:540px}

/* Soft light-theme glow behind the hero */
.hero{position:relative}
.hero::before{content:"";position:absolute;inset:-60px -40px auto -40px;height:420px;z-index:-1;
  background:radial-gradient(620px 320px at 22% 30%,rgba(46,109,246,.12),transparent 70%),
             radial-gradient(560px 300px at 85% 20%,rgba(123,63,228,.12),transparent 70%);}

/* Future / v2 upgrade note */
.future-note{max-width:520px;margin:22px auto 0;display:flex;gap:14px;align-items:flex-start;
  background:var(--bg2);border:1px solid var(--line);border-radius:16px;padding:18px 20px}
.future-tag{flex:0 0 auto;font-size:12px;font-weight:700;color:var(--purple);background:color-mix(in srgb,var(--purple) 12%,transparent);padding:5px 11px;border-radius:999px;white-space:nowrap}
.future-note p{font-size:14px;color:var(--muted);margin:0}
.future-note strong{color:var(--ink)}

/* TRUST STRIP */
.strip{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;max-width:1000px;margin:30px auto;padding:24px 28px;background:var(--bg2);border-radius:var(--radius)}
.strip div{text-align:center}
.strip strong{display:block;font-size:18px}
.strip span{font-size:13px;color:var(--muted)}

/* SECTIONS */
.section{max-width:1120px;margin:0 auto;padding:74px 28px}
.section.alt{background:var(--bg2);max-width:none}
.section.alt>*{max-width:1120px;margin-left:auto;margin-right:auto}
.section h2{font-size:clamp(26px,3.4vw,38px);text-align:center;letter-spacing:-.02em;font-weight:800}
.section-sub{text-align:center;color:var(--muted);font-size:17px;margin-top:10px}

/* FEATURE GRID */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:42px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.card .ic{font-size:28px;width:54px;height:54px;display:grid;place-items:center;border-radius:14px;background:color-mix(in srgb,var(--blue) 10%,transparent);margin-bottom:14px}
.card h3{font-size:18px;margin-bottom:7px}
.card p{color:var(--muted);font-size:15px}

/* STEPS */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:42px}
.step{text-align:center;padding:10px}
.step .num{display:grid;place-items:center;width:46px;height:46px;margin:0 auto 14px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;font-size:19px}
.step h3{font-size:18px;margin-bottom:6px}
.step p{color:var(--muted);font-size:15px}

/* PRICING */
.price-card{position:relative;max-width:440px;margin:42px auto 0;background:var(--card);border:1px solid var(--line);border-radius:24px;padding:38px 34px;box-shadow:var(--shadow);text-align:center}
.price-flag{position:absolute;top:18px;right:18px;background:var(--grad);color:#fff;font-size:12px;font-weight:700;padding:5px 11px;border-radius:999px}
.price-card h3{font-size:20px}
.price{margin:16px 0 4px;display:flex;align-items:baseline;justify-content:center;gap:12px}
.price .now{font-size:52px;font-weight:800;letter-spacing:-.03em}
.price .was{font-size:22px;color:var(--muted);text-decoration:line-through}
.price-note{color:var(--muted);font-size:14px}
.checks{list-style:none;text-align:left;margin:24px auto;max-width:300px;display:grid;gap:11px}
.checks li{padding-left:30px;position:relative;font-size:15px}
.checks li::before{content:"✓";position:absolute;left:0;top:-1px;width:20px;height:20px;background:color-mix(in srgb,var(--teal) 18%,transparent);color:var(--teal);border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:800}
.pay-row{display:flex;flex-direction:column;gap:10px;margin-top:8px}

/* ALIPAY */
.alipay-box{max-width:380px;margin:28px auto 0;text-align:center;background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.alipay-box h3{font-size:18px;margin-bottom:6px}
.alipay-box p{color:var(--muted);font-size:15px;margin-bottom:14px}
.qr{width:180px;height:180px;border-radius:12px;background:#fff;padding:8px;margin-bottom:14px}

/* FINAL CTA */
.cta-final{text-align:center;background:var(--grad);border-radius:0}
.cta-final h2,.cta-final p{color:#fff}
.cta-final p{opacity:.92;margin:8px 0 24px;font-size:18px}
.cta-final .btn-primary{background:#fff;color:var(--blue);box-shadow:0 8px 24px rgba(0,0,0,.2)}

/* FOOTER */
.footer{background:var(--bg2);border-top:1px solid var(--line);padding:38px 28px}
.footer-in{max-width:1120px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px}
.footer-in>div{display:flex;align-items:center;gap:9px;font-size:17px}
.footer nav{display:flex;gap:20px;color:var(--muted);font-size:15px}
.footer nav a:hover{color:var(--ink)}
.copy{color:var(--muted);font-size:13px;width:100%;text-align:center;margin-top:6px}

/* REVEAL ANIMATION */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.float-icon{animation:none}}

/* RESPONSIVE */
@media (max-width:860px){
  .hero{grid-template-columns:1fr;padding-top:48px;text-align:center}
  .hero .lead{margin-left:auto;margin-right:auto}
  .hero-logo{margin-left:auto;margin-right:auto}
  .hero-cta,.badge-row{justify-content:center}
  .hero-art{margin-top:30px}
  .grid,.steps,.strip{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
}
@media (max-width:540px){
  .grid,.steps,.strip{grid-template-columns:1fr}
  .footer-in{flex-direction:column;text-align:center}
}