/* ===== Shared landing page styles — beian sites ===== */
:root{
  --brand:#6366f1; --brand-dark:#4f46e5; --brand-light:#eef2ff;
  --ink:#0f172a; --muted:#64748b; --line:#e2e8f0; --bg:#ffffff; --bg-soft:#f8fafc;
  --radius:16px; --shadow:0 10px 30px -12px rgba(15,23,42,.18); --maxw:1120px;
  --font:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,svg{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;border:0;transition:.2s}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px -8px var(--brand)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;color:var(--brand);background:var(--brand-light);padding:6px 14px;border-radius:999px;letter-spacing:.02em}
h1,h2,h3{line-height:1.2;letter-spacing:-.02em}
.section{padding:84px 0}
.section h2{font-size:clamp(28px,4vw,42px);margin:14px 0 16px}
.section .lead{color:var(--muted);font-size:18px;max-width:620px}
.center{text-align:center}
.center .lead{margin:0 auto}
.grid{display:grid;gap:24px}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:-.02em}
.brand .mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-dark));display:grid;place-items:center;color:#fff;box-shadow:0 6px 14px -6px var(--brand)}
.nav ul{display:flex;gap:30px;list-style:none}
.nav ul a{color:var(--muted);font-size:15px;font-weight:500}
.nav ul a:hover{color:var(--ink)}
.nav .cta{display:flex;gap:10px;align-items:center}
@media(max-width:860px){.nav ul{display:none}}

/* hero */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(1200px 500px at 80% -10%, var(--brand-light), transparent 60%),
  linear-gradient(180deg,#fff, var(--bg-soft));}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding:72px 24px 90px}
.hero h1{font-size:clamp(34px,5vw,56px);margin:18px 0 20px}
.hero p.sub{font-size:19px;color:var(--muted);max-width:540px;margin-bottom:30px}
.hero .actions{display:flex;gap:14px;flex-wrap:wrap}
.hero .proof{margin-top:26px;display:flex;gap:28px;flex-wrap:wrap;color:var(--muted);font-size:14px}
.hero .proof b{color:var(--ink);font-size:20px;display:block}
.hero-art{position:relative}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:18px;transform:rotate(-1.2deg)}
.hero-card .bar{display:flex;gap:6px;margin-bottom:14px}
.hero-card .bar i{width:11px;height:11px;border-radius:50%;background:#e2e8f0;display:block}
.hero-card .bar i:nth-child(1){background:#ff5f57}
.hero-card .bar i:nth-child(2){background:#febc2e}
.hero-card .bar i:nth-child(3){background:#28c840}
.hero-card .canvas{aspect-ratio:4/3;border-radius:14px;background:
   radial-gradient(420px 300px at 30% 20%, var(--brand-light), transparent),
   linear-gradient(135deg,#f1f5f9,#fff);display:grid;place-items:center;overflow:hidden}
@media(max-width:860px){.hero .wrap{grid-template-columns:1fr}.hero-art{display:none}}

/* logos strip */
.strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-soft)}
.strip .wrap{display:flex;align-items:center;gap:40px;flex-wrap:wrap;padding:26px 24px;color:var(--muted);font-weight:600;font-size:15px}
.strip span{opacity:.65}

/* features */
.feat{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-4px);border-color:transparent}
.card .ico{width:46px;height:46px;border-radius:12px;background:var(--brand-light);color:var(--brand);display:grid;place-items:center;margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}
@media(max-width:860px){.feat{grid-template-columns:1fr}}

/* steps */
.steps{grid-template-columns:repeat(3,1fr);counter-reset:s}
.step{position:relative;padding:30px 26px;border-radius:var(--radius);background:var(--bg-soft);border:1px solid var(--line)}
.step::before{counter-increment:s;content:counter(s);position:absolute;top:-16px;left:26px;width:34px;height:34px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700;font-size:15px}
.step h3{font-size:18px;margin:6px 0 8px}
.step p{color:var(--muted);font-size:15px}
@media(max-width:860px){.steps{grid-template-columns:1fr}}

/* showcase */
.show{grid-template-columns:repeat(3,1fr)}
.show .tile{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--bg-soft);aspect-ratio:1;position:relative}
.show .tile .tag{position:absolute;left:12px;bottom:12px;background:rgba(15,23,42,.8);color:#fff;font-size:12px;padding:5px 10px;border-radius:999px}
@media(max-width:860px){.show{grid-template-columns:repeat(2,1fr)}}

/* cta band */
.cta-band{background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;border-radius:28px;padding:56px;text-align:center;box-shadow:var(--shadow)}
.cta-band h2{color:#fff}
.cta-band p{color:rgba(255,255,255,.85);max-width:560px;margin:12px auto 26px}
.cta-band .btn-primary{background:#fff;color:var(--brand-dark)}
.cta-band .btn-primary:hover{background:#f1f5f9}

/* faq */
.faq{max-width:780px;margin:0 auto}
.faq details{border:1px solid var(--line);border-radius:12px;padding:18px 22px;margin-bottom:12px;background:#fff}
.faq summary{font-weight:600;cursor:pointer;list-style:none;font-size:16px}
.faq summary::-webkit-details-marker{display:none}
.faq details[open]{border-color:var(--brand);box-shadow:0 6px 18px -10px var(--brand)}
.faq p{color:var(--muted);margin-top:10px;font-size:15px}

/* footer */
footer{background:#0b1120;color:#94a3b8;padding:56px 0 28px;margin-top:20px}
footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid #1e293b}
footer .brand{color:#fff;font-size:18px}
footer .brand p{color:#64748b;font-size:14px;margin-top:10px;max-width:280px}
footer h4{color:#fff;font-size:14px;margin-bottom:14px}
footer ul{list-style:none}
footer ul li{margin-bottom:9px;font-size:14px}
footer ul a:hover{color:#fff}
footer .legal{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding-top:22px;font-size:13px}
footer .legal a{color:#94a3b8}
footer .legal a:hover{color:#fff}
footer .icp{display:inline-flex;align-items:center;gap:6px}
@media(max-width:860px){footer .cols{grid-template-columns:1fr 1fr}}