/* 云虾阁 yunxiage.com — 万物皆可成虾 · AI 虾种图鉴 */
:root{
  --brand:#5b5bd6; --brand-dark:#4343b8; --brand-soft:#eef0ff;
  --accent:#ff6b57; --accent-dark:#e2452f; --accent-soft:#ffece8;
  --teal:#0f9d8f; --teal-soft:#e3f7f4;
  --ink:#141a2e; --ink-2:#39415a; --muted:#6b7590;
  --line:#e6e9f4; --bg:#ffffff; --bg-2:#f6f7fe;
  --radius:16px; --shadow:0 10px 30px rgba(20,26,46,.09);
  --maxw:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);background:var(--bg);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:70px;gap:16px}
.logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:20px;letter-spacing:.5px}
.logo .mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,#7c7cf0,#4343b8);display:grid;place-items:center;box-shadow:0 6px 16px rgba(91,91,214,.38)}
.logo .mark svg{width:26px;height:26px}
.logo small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:2px;margin-top:-3px}
.nav{display:flex;align-items:center;gap:2px}
.nav a{padding:9px 14px;border-radius:9px;font-size:15px;color:#2c3542;font-weight:500}
.nav a:hover{background:var(--bg-2);color:var(--brand)}
.nav a.on{color:var(--brand);font-weight:700;background:var(--brand-soft)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:11px;font-weight:700;font-size:15px;border:1px solid transparent;transition:.18s;cursor:pointer}
.btn-p{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(91,91,214,.3)}
.btn-p:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-a{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(255,107,87,.32)}
.btn-a:hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-o{border-color:var(--line);background:#fff;color:var(--ink)}
.btn-o:hover{border-color:var(--brand);color:var(--brand)}
.btn-lg{padding:14px 30px;font-size:16px;border-radius:13px}
.burger{display:none;background:none;border:0;padding:10px;cursor:pointer}
.burger span{display:block;width:22px;height:2px;background:var(--ink);margin:4px 0;border-radius:2px}

/* hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background:
    radial-gradient(900px 460px at 90% -12%, #e6e6ff 0%, rgba(255,255,255,0) 62%),
    radial-gradient(720px 400px at 4% 112%, #ffe6e0 0%, rgba(255,255,255,0) 60%),
    linear-gradient(180deg,#fff 0%,#fbfbfe 100%);
  padding:78px 0 64px}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center}
.tag{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 15px;font-size:13px;font-weight:600;color:var(--brand);box-shadow:var(--shadow)}
.tag .dot{width:7px;height:7px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px var(--teal-soft)}
h1{font-size:47px;line-height:1.2;margin:22px 0 0;letter-spacing:-.8px}
h1 em{font-style:normal;background:linear-gradient(120deg,var(--accent),#ff9d4d);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:17.5px;color:#4a5563;margin:18px 0 28px;max-width:560px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;margin-top:40px;padding-top:26px;border-top:1px dashed var(--line);flex-wrap:wrap}
.hero-stats b{display:block;font-size:27px;line-height:1.2}
.hero-stats span{font-size:13px;color:var(--muted)}

/* hero visual card */
.card-float{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:22px}
.card-float h3{margin:0 0 3px;font-size:16px}
.card-float .sub{font-size:12.5px;color:var(--muted);margin:0 0 14px}
.chat{display:flex;gap:11px;margin-top:13px}
.chat .av{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,#7c7cf0,#4343b8);flex:0 0 auto;display:grid;place-items:center;font-size:17px}
.chat .bub{background:var(--bg-2);border-radius:13px;padding:10px 14px;font-size:14px;color:#3a4358}
.chat.me{flex-direction:row-reverse}
.chat.me .bub{background:var(--teal-soft)}
.badge-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.badge{background:var(--brand-soft);color:var(--brand-dark);font-size:12.5px;font-weight:600;padding:5px 12px;border-radius:999px}
.badge.a{background:var(--accent-soft);color:var(--accent-dark)}
.badge.t{background:var(--teal-soft);color:var(--teal)}

/* sections */
section{padding:72px 0}
.sec-head{text-align:center;max-width:740px;margin:0 auto 44px}
.sec-head h2{font-size:32px;margin:12px 0 10px;letter-spacing:-.4px}
.sec-head p{color:var(--muted);margin:0}
.kicker{color:var(--brand);font-weight:800;font-size:13px;letter-spacing:4px;text-transform:uppercase}
.kicker.a{color:var(--accent)}
.bg-2{background:var(--bg-2)}
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

/* filter chips */
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:0 0 34px}
.chip{border:1px solid var(--line);background:#fff;color:var(--ink-2);font-size:14px;font-weight:600;padding:9px 18px;border-radius:999px;cursor:pointer;transition:.16s}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.on{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(91,91,214,.28)}

/* shrimp card */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.2s;cursor:pointer}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d9def0}
.card .ico{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;font-size:26px;margin-bottom:14px;background:var(--brand-soft)}
.card .cat{font-size:11.5px;font-weight:700;letter-spacing:1px;color:var(--muted);text-transform:uppercase}
.card h3{margin:6px 0 8px;font-size:18px}
.card p{margin:0;color:#5b6674;font-size:14.5px}
.card .tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.card .tags span{font-size:12px;color:var(--teal);background:var(--teal-soft);border-radius:999px;padding:3px 10px;font-weight:600}
.card .more{display:inline-block;margin-top:14px;color:var(--brand);font-weight:700;font-size:14px}
.card[hidden]{display:none}

/* feature */
.feat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.feat .ico{width:50px;height:50px;border-radius:13px;background:var(--brand-soft);display:grid;place-items:center;font-size:24px;margin-bottom:14px}
.feat h3{margin:0 0 8px;font-size:17.5px}
.feat p{margin:0;color:#5b6674;font-size:14.5px}

/* flow */
.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:s}
.flow .step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;position:relative}
.flow .step:before{counter-increment:s;content:counter(s);position:absolute;top:-16px;left:22px;width:34px;height:34px;border-radius:11px;background:var(--accent);color:#fff;font-size:16px;font-weight:800;display:grid;place-items:center;box-shadow:0 8px 18px rgba(255,107,87,.32)}
.flow .step h4{margin:14px 0 8px;font-size:17px}
.flow .step p{margin:0;color:#5b6674;font-size:14.5px}

/* cta band */
.cta-band{background:linear-gradient(120deg,#1b2140,#2a2f57 60%,#3a2f6b);color:#fff;border-radius:24px;padding:50px;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;position:relative;overflow:hidden}
.cta-band:after{content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(255,107,87,.35),rgba(255,107,87,0) 70%)}
.cta-band h2{margin:0 0 8px;font-size:28px}
.cta-band p{margin:0;color:#c3c9e0;max-width:560px}

/* footer */
.site-footer{background:#121728;color:#a6afc4;padding:58px 0 26px;font-size:13.8px}
.f-grid{display:grid;grid-template-columns:1.9fr .9fr 1fr 1fr 2.1fr;gap:22px}
.site-footer h4{color:#fff;font-size:15.5px;margin:0 0 14px}
.site-footer a{display:block;padding:5px 0;color:#a6afc4}
.site-footer a:hover{color:#fff}
.site-footer .brandline{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;margin-bottom:12px}
.site-footer .brandline .mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,#7c7cf0,#4343b8);display:grid;place-items:center;font-size:18px}
.site-footer .fbrand p{color:#8c96ad;margin:0 0 12px}
.f-bottom{border-top:1px solid #232a42;margin-top:38px;padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#7c869d;font-size:13px}

/* page head (sub pages) */
.page-head{background:linear-gradient(180deg,#fff,#f6f7fe);border-bottom:1px solid var(--line);padding:56px 0}
.page-head h1{font-size:36px;margin:10px 0 8px}
.crumb{font-size:13.5px;color:var(--muted)}
.crumb a:hover{color:var(--brand)}

.center{text-align:center}
.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-32{margin-top:32px}

@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .f-grid{grid-template-columns:1fr 1fr}
  h1{font-size:38px}
  .float-v{display:none}
}
@media(max-width:720px){
  .nav{display:none}
  .nav.open{display:flex;position:absolute;top:70px;left:0;right:0;background:#fff;flex-direction:column;padding:12px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .burger{display:block}
  .g2,.g3,.g4,.flow{grid-template-columns:1fr}
  .f-grid{grid-template-columns:1fr}
  h1{font-size:32px}
  .hero{padding:56px 0 44px}
  section{padding:52px 0}
  .cta-band{padding:32px}
}