/* ── Shadowfy 落地页：现代渐变风 ── */
:root{
  --g1:#4F46E5; --g2:#7C3AED; --g3:#EC4899;          /* 渐变三段 */
  --accent:#6D5BF6; --accent-2:#EC4899;
  --accent-soft:rgba(109,91,246,.10);
  --bg:#F7F6F3; --surface:#FFFFFF; --ink:#15131F; --text:#1A1814; --text2:#5B5666; --muted:#9A95A6;
  --border:rgba(20,16,40,.08); --radius:22px; --maxw:1080px;
  --shadow:0 18px 50px -18px rgba(79,70,229,.30);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--text);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:var(--accent);text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.grad{background:linear-gradient(120deg,var(--g1),var(--g2) 55%,var(--g3));-webkit-background-clip:text;background-clip:text;color:transparent}

.btn{
  display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:15px;
  padding:14px 26px;border-radius:40px;transition:transform .15s ease,box-shadow .15s ease,opacity .15s ease;
  background:linear-gradient(120deg,var(--g1),var(--g2) 60%,var(--g3));color:#fff;
  box-shadow:0 12px 30px -8px rgba(124,58,237,.55);
}
.btn:hover{transform:translateY(-2px);box-shadow:0 18px 38px -8px rgba(124,58,237,.6)}
.btn--light{background:#fff;color:var(--g2);box-shadow:0 12px 30px -10px rgba(0,0,0,.3)}
.btn--ghost{background:rgba(255,255,255,.16);color:#fff;box-shadow:none;border:1px solid rgba(255,255,255,.35)}
.btn--ghost:hover{background:rgba(255,255,255,.26)}

/* 顶栏 */
header.nav{position:sticky;top:0;z-index:20;background:rgba(247,246,243,.72);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:22px;font-weight:900;letter-spacing:-.6px;color:var(--ink)}
.logo span{background:linear-gradient(120deg,var(--g1),var(--g3));-webkit-background-clip:text;background-clip:text;color:transparent}
.nav nav a{color:var(--text2);font-weight:600;margin-left:24px;font-size:15px}
.nav nav a:hover{color:var(--ink)}

/* Hero */
.hero{position:relative;overflow:hidden;text-align:center;color:#fff;padding:104px 0 110px;
  background:linear-gradient(135deg,#4F46E5 0%,#7C3AED 48%,#EC4899 100%);}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;pointer-events:none}
.hero::before{width:420px;height:420px;background:#22D3EE;top:-140px;left:-120px}
.hero::after{width:460px;height:460px;background:#F472B6;bottom:-180px;right:-120px}
.hero .wrap{position:relative;z-index:2}
.hero .tag{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);
  color:#fff;font-weight:600;font-size:13px;padding:7px 16px;border-radius:30px;margin-bottom:24px;backdrop-filter:blur(6px)}
.hero h1{font-size:clamp(38px,6.4vw,68px);line-height:1.05;letter-spacing:-1.5px;font-weight:900;margin-bottom:20px}
.hero h1 .hl{background:linear-gradient(120deg,#FDE68A,#FFFFFF 60%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:clamp(16px,2.4vw,21px);color:rgba(255,255,255,.92);max-width:660px;margin:0 auto 34px}
.hero .cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* 心跳圆 + 声波（仿 App 首页，纯 CSS）*/
.hero-visual{display:flex;justify-content:center;margin-top:52px}
.pulse{position:relative;width:200px;height:200px;display:flex;align-items:center;justify-content:center}
.pulse .ring{position:absolute;inset:0;border-radius:50%;border:2px solid rgba(255,255,255,.55);animation:ripple 2.6s ease-out infinite}
.pulse .ring:nth-child(2){animation-delay:.85s}
.pulse .ring:nth-child(3){animation-delay:1.7s}
@keyframes ripple{0%{transform:scale(.62);opacity:.65}100%{transform:scale(1.7);opacity:0}}
.pulse .core{width:150px;height:150px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.15);backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.45);
  box-shadow:0 18px 50px -12px rgba(0,0,0,.35);animation:breathe 1.9s ease-in-out infinite}
@keyframes breathe{0%,100%{transform:scale(1)}50%{transform:scale(1.06)}}
.wave{display:flex;align-items:center;gap:4px;height:64px}
.wave i{display:block;width:4px;border-radius:3px;background:#fff;transform-origin:center;animation:bar 1s ease-in-out infinite}
@keyframes bar{0%,100%{transform:scaleY(.38)}50%{transform:scaleY(1)}}
@media(prefers-reduced-motion:reduce){.pulse .ring,.pulse .core,.wave i{animation:none}}

/* 图文展示区 */
.showcase .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
.showcase .copy .eyebrow{text-align:left}
.showcase .copy h2{text-align:left;margin-bottom:14px}
.showcase .copy p{color:var(--text2);font-size:17px;margin-bottom:22px}
.showcase img{width:100%;display:block;border-radius:24px;box-shadow:var(--shadow)}
@media(max-width:760px){.showcase .wrap{grid-template-columns:1fr;gap:28px}}

/* 区块 */
section{padding:74px 0}
.eyebrow{display:block;text-align:center;font-weight:800;font-size:13px;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:10px}
section h2{font-size:clamp(28px,4.4vw,42px);text-align:center;letter-spacing:-.8px;font-weight:900;margin-bottom:12px;color:var(--ink)}
section .lead{text-align:center;color:var(--text2);max-width:640px;margin:0 auto 46px;font-size:17px}

/* 特性卡 */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:20px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;
  transition:transform .18s ease,box-shadow .18s ease;position:relative;overflow:hidden}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.card .ico{display:inline-flex;align-items:center;justify-content:center;width:54px;height:54px;border-radius:16px;
  font-size:26px;margin-bottom:16px;background:linear-gradient(135deg,var(--accent-soft),rgba(236,72,153,.12))}
.card h3{font-size:18px;margin-bottom:7px;color:var(--ink)}
.card p{color:var(--text2);font-size:15px}

/* How it works */
.howbg{background:linear-gradient(180deg,rgba(124,58,237,.06),rgba(236,72,153,.06))}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px;counter-reset:s}
.step{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;position:relative;overflow:hidden}
.step::before{counter-increment:s;content:counter(s);position:absolute;top:10px;right:18px;font-size:56px;font-weight:900;
  background:linear-gradient(120deg,var(--g1),var(--g3));-webkit-background-clip:text;background-clip:text;color:transparent;opacity:.20}
.step h3{font-size:17px;margin-bottom:7px;color:var(--ink);position:relative}
.step p{color:var(--text2);font-size:15px;position:relative}

/* 语言 */
.langs{display:flex;flex-wrap:wrap;gap:11px;justify-content:center;max-width:780px;margin:0 auto}
.chip{background:var(--surface);border:1px solid var(--border);border-radius:30px;padding:9px 18px;font-size:14.5px;color:var(--text2);
  transition:transform .15s ease,border-color .15s ease,color .15s ease}
.chip:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--ink)}

/* 联系 / 表单 */
.contact-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;max-width:780px;margin:0 auto;box-shadow:var(--shadow)}
.contact-box iframe{display:block;width:100%;border:0}

/* CTA 收尾条 */
.cta-band{background:linear-gradient(135deg,#4F46E5,#7C3AED 55%,#EC4899);color:#fff;text-align:center;border-radius:28px;padding:54px 24px;margin:0 22px;max-width:var(--maxw);}
.cta-band.wrapw{margin-left:auto;margin-right:auto}
.cta-band h2{color:#fff}
.cta-band p{color:rgba(255,255,255,.9);margin-bottom:24px}

/* 法律页 */
.legal{max-width:800px;margin:0 auto;padding:54px 0}
.legal h1{font-size:clamp(30px,5vw,40px);font-weight:900;letter-spacing:-.6px;margin-bottom:6px;color:var(--ink)}
.legal .updated{color:var(--muted);font-size:14px;margin-bottom:30px}
.legal h2{font-size:21px;font-weight:800;margin:30px 0 8px;color:var(--ink)}
.legal p,.legal li{color:var(--text2);margin-bottom:10px}
.legal ul{padding-left:22px}
.legal a{font-weight:700}

/* 页脚（深色，更现代） */
footer{background:var(--ink);color:rgba(255,255,255,.6);padding:40px 0;margin-top:20px}
footer .wrap{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center}
footer .logo{color:#fff}
footer a{color:rgba(255,255,255,.72);margin-left:20px;font-weight:500}
footer a:hover{color:#fff}
footer a:first-child{margin-left:0}
@media(max-width:560px){
  .nav nav a{margin-left:16px;font-size:14px}
  .hero{padding:80px 0 84px}
  footer .wrap{flex-direction:column;text-align:center}
  footer .links a{margin:0 9px}
}