:root{
  --accent:#1f6feb; --accent-d:#1858c4;
  --bg:#ffffff; --bg2:#f6f8fb; --ink:#0f172a; --dim:#5b6b82; --line:#e3e8f0;
  --radius:14px; --wrap:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.2;font-weight:700}
h1{font-size:clamp(30px,4.4vw,52px);letter-spacing:-.02em}
h2{font-size:clamp(24px,3vw,34px);letter-spacing:-.01em}
h3{font-size:19px}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}
.accent{color:var(--accent)}
.dim{color:var(--dim)}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:.6em}

/* buttons */
.btn{display:inline-block;border-radius:10px;padding:11px 18px;font-weight:600;font-size:15px;border:1px solid transparent;transition:.15s;cursor:pointer}
.btn.primary{background:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accent-d)}
.btn.ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn.lg{padding:14px 24px;font-size:16px}

/* header */
.top{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:22px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.mark{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:8px;background:var(--accent);color:#fff;font-size:15px;font-weight:800}
.nav{display:flex;gap:20px;margin-left:auto;font-size:15px;color:var(--dim)}
.nav a:hover{color:var(--accent)}
.top .btn.primary{margin-left:6px}
@media(max-width:820px){.nav{display:none}}

/* hero */
.hero{background:linear-gradient(180deg,var(--bg2),#fff);border-bottom:1px solid var(--line);padding:70px 0 60px}
.hero-in{display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:center}
.lead{font-size:18px;color:var(--dim);max-width:60ch}
.hero-cta{display:flex;gap:12px;margin:22px 0 12px;flex-wrap:wrap}
.hero-note{font-size:14px;color:var(--dim)}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 18px 40px -24px rgba(15,23,42,.35)}
.card-row{display:flex;align-items:center;gap:8px;font-weight:600;color:var(--dim);font-size:14px;margin-bottom:14px}
.dot{width:9px;height:9px;border-radius:50%;display:inline-block}
.dot.ok{background:#22c55e;box-shadow:0 0 0 4px rgba(34,197,94,.15)}
.metric{display:flex;justify-content:space-between;align-items:baseline;padding:12px 0;border-top:1px solid var(--line)}
.m-v{font-size:24px;font-weight:800;color:var(--accent)}
.m-k{color:var(--dim);font-size:14px}
@media(max-width:820px){.hero-in{grid-template-columns:1fr}}

/* sections */
.sec{padding:64px 0}
.sec.band{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card h3{margin-top:8px}
.card p{color:var(--dim);margin:0;font-size:15px}
.ico{width:42px;height:42px;border-radius:10px;background:color-mix(in srgb,var(--accent) 12%,#fff);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:20px}
.grid3 h4{font-size:17px}
.grid3 p{color:var(--dim)}
@media(max-width:900px){.grid,.grid3{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.grid,.grid3{grid-template-columns:1fr}}

/* plans */
.plans{align-items:stretch}
.plan{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column}
.plan.feat{border-color:var(--accent);box-shadow:0 22px 50px -30px var(--accent);transform:translateY(-6px)}
.plan .price{font-size:38px;font-weight:800;color:var(--ink);margin:.2em 0 .6em}
.plan .price span{font-size:15px;font-weight:500;color:var(--dim)}
.plan ul{list-style:none;padding:0;margin:0 0 20px;flex:1}
.plan li{padding:8px 0 8px 26px;position:relative;color:var(--dim);border-top:1px solid var(--line);font-size:15px}
.plan li:before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}
.plan .btn{text-align:center}

/* contact */
.cta{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center;background:var(--bg2);border:1px solid var(--line);border-radius:18px;padding:40px}
.contact-card p{font-size:15px}
.contact-card a{color:var(--accent)}
@media(max-width:820px){.cta{grid-template-columns:1fr}}

/* footer */
.foot{border-top:1px solid var(--line);padding:34px 0;background:#fff}
.foot-in{display:flex;gap:24px;flex-wrap:wrap;align-items:center;justify-content:space-between}
.foot .brand-txt{font-weight:800}
.foot-nav{display:flex;gap:18px;color:var(--dim);font-size:15px}
.foot-nav a:hover{color:var(--accent)}
.copy{font-size:13px;width:100%;margin:6px 0 0}