/* ZALO 方案三 · 渐变商品详情型 / Product Showcase
   配色: 紫色 / 桃粉渐变,圆角,大阴影,柔和
   关键词布局: Product / Why / Inside / Audience / Pricing
*/

:root{
  --bg:#f7f5ff;
  --surface:#ffffff;
  --ink:#1a1428;
  --ink-soft:#5d5677;
  --line:#ece8f7;
  --purple:#7c3aed;
  --purple-2:#a855f7;
  --pink:#ec4899;
  --orange:#fb923c;
  --grad:linear-gradient(135deg,#7c3aed 0%,#a855f7 50%,#ec4899 100%);
  --grad-soft:linear-gradient(135deg,rgba(124,58,237,.10),rgba(236,72,153,.10));
  --shadow:0 18px 50px -20px rgba(124,58,237,.35);
  --shadow-sm:0 6px 20px -8px rgba(124,58,237,.18);
  --radius:24px;
  --max:1200px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:"Inter","PingFang SC","Helvetica Neue",system-ui,sans-serif;
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* ===== Topbar ===== */
.topbar{
  position:sticky;
  top:0;
  z-index:30;
  background:rgba(247,245,255,.85);
  backdrop-filter:blur(14px);
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:18px 32px;
  border-bottom:1px solid var(--line);
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:22px;
  letter-spacing:-.02em;
  color:var(--ink);
}
.brand img{width:36px;height:36px;border-radius:9px}
nav{display:flex;align-items:center;gap:30px;font-size:14px;font-weight:500}
nav a{color:var(--ink-soft);transition:.2s}
nav a:hover{color:var(--purple)}
.btn-nav{
  background:var(--ink);
  color:#fff !important;
  padding:10px 22px;
  border-radius:99px;
  font-weight:600;
}
.btn-nav:hover{background:var(--purple)}

/* ===== Hero ===== */
.hero{
  padding:60px 32px 80px;
  position:relative;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  top:-120px;
  right:-160px;
  width:520px;
  height:520px;
  background:radial-gradient(circle,rgba(168,85,247,.22),transparent 70%);
  z-index:0;
}
.hero-inner{
  max-width:var(--max);
  margin:0 auto;
  display:grid;
  grid-template-columns:1.05fr 1fr;
  gap:60px;
  align-items:center;
  position:relative;
  z-index:1;
}
.pill{
  display:inline-block;
  background:var(--grad);
  color:#fff;
  padding:6px 16px;
  border-radius:99px;
  font-size:13px;
  font-weight:600;
  margin-bottom:24px;
}
.hero-text h1{
  font-size:clamp(40px,5.4vw,72px);
  font-weight:800;
  line-height:1.05;
  letter-spacing:-.03em;
  margin-bottom:22px;
}
.hero-text h1 em{
  font-style:normal;
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-text > p{
  font-size:17px;
  color:var(--ink-soft);
  max-width:520px;
  margin-bottom:30px;
}
.cta-row{display:flex;gap:14px;align-items:center;margin-bottom:36px;flex-wrap:wrap}
.btn-primary{
  background:var(--grad);
  color:#fff;
  padding:16px 32px;
  border-radius:99px;
  font-weight:600;
  font-size:15px;
  box-shadow:var(--shadow);
  transition:.25s;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 22px 60px -20px rgba(168,85,247,.5)}
.btn-text{
  color:var(--purple);
  font-weight:600;
  font-size:15px;
}
.btn-text:hover{color:var(--pink)}
.trust{display:flex;gap:30px;flex-wrap:wrap}
.trust div{display:flex;flex-direction:column}
.trust b{font-size:24px;color:var(--ink);font-weight:800;letter-spacing:-.02em}
.trust span{font-size:13px;color:var(--ink-soft)}

/* Hero Art */
.hero-art{
  position:relative;
  display:flex;
  justify-content:center;
  align-items:center;
}
.art-blob{
  position:absolute;
  inset:-30px;
  background:var(--grad);
  border-radius:42% 58% 70% 30% / 45% 45% 55% 55%;
  opacity:.18;
  filter:blur(40px);
  animation:blob 12s ease-in-out infinite alternate;
}
@keyframes blob{
  0%{border-radius:42% 58% 70% 30%/45% 45% 55% 55%}
  100%{border-radius:60% 40% 30% 70%/55% 60% 40% 45%}
}
.hero-art img{
  position:relative;
  z-index:2;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  max-width:440px;
  width:100%;
}
.badge{
  position:absolute;
  background:var(--surface);
  padding:12px 18px;
  border-radius:99px;
  font-size:14px;
  font-weight:600;
  box-shadow:var(--shadow-sm);
  z-index:3;
}
.b1{top:10%;left:-6%}
.b2{bottom:18%;right:-4%;background:linear-gradient(135deg,#fef3c7,#fde68a);color:#92400e}
.b3{top:48%;right:-10%;background:linear-gradient(135deg,#dcfce7,#bbf7d0);color:#15803d}

/* ===== Logos ===== */
.logos{
  background:var(--surface);
  padding:30px 32px;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  text-align:center;
}
.logos p{
  font-size:12px;
  letter-spacing:.22em;
  color:var(--ink-soft);
  margin-bottom:18px;
}
.logo-row{
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:40px;
}
.logo-row span{
  font-weight:700;
  color:var(--ink);
  letter-spacing:.08em;
  font-size:15px;
  opacity:.55;
  transition:.2s;
}
.logo-row span:hover{opacity:1;color:var(--purple)}

/* ===== Why ===== */
.why{padding:100px 32px;max-width:var(--max);margin:0 auto}
.why-head{text-align:center;margin-bottom:60px}
.kicker{
  display:inline-block;
  font-size:13px;
  color:var(--purple);
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  margin-bottom:14px;
}
.why-head h2{
  font-size:clamp(32px,4vw,52px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.1;
  margin-bottom:18px;
}
.why-head h2 em,.inside-head h2 em,.aud-head h2 em,.pr-head h2 em{
  font-style:normal;
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.why-head p{
  font-size:17px;
  color:var(--ink-soft);
  max-width:680px;
  margin:0 auto;
}
.why-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:22px;
}
.why-card{
  background:var(--surface);
  border-radius:var(--radius);
  padding:30px;
  border:1px solid var(--line);
  transition:.25s;
}
.why-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow);
  border-color:transparent;
}
.ico{
  font-size:38px;
  width:60px;
  height:60px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--grad-soft);
  border-radius:18px;
  margin-bottom:18px;
}
.why-card h3{
  font-size:19px;
  font-weight:700;
  margin-bottom:10px;
  letter-spacing:-.01em;
}
.why-card p{font-size:14.5px;color:var(--ink-soft);line-height:1.55}

/* ===== Inside ===== */
.inside{padding:100px 32px;background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.inside-head,.aud-head,.pr-head{text-align:center;margin-bottom:60px}
.inside-head h2,.aud-head h2,.pr-head h2{
  font-size:clamp(32px,4vw,52px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.1;
}
.feature-list{max-width:var(--max);margin:0 auto;display:flex;flex-direction:column;gap:80px}
.row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:60px;
  align-items:center;
}
.row.reverse .row-img{order:2}
.row-img{
  position:relative;
}
.row-img img{
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  width:100%;
}
.row-text .tag{
  display:inline-block;
  background:var(--grad-soft);
  color:var(--purple);
  padding:6px 14px;
  border-radius:99px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  margin-bottom:16px;
}
.row-text h3{
  font-size:36px;
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.15;
  margin-bottom:16px;
}
.row-text p{
  font-size:16.5px;
  color:var(--ink-soft);
  margin-bottom:22px;
}
.row-text a{
  display:inline-block;
  color:var(--purple);
  font-weight:600;
}
.row-text a:hover{color:var(--pink)}

/* ===== Audience ===== */
.audience{padding:100px 32px;max-width:var(--max);margin:0 auto}
.aud-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.aud-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:30px;
  transition:.25s;
}
.aud-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow);
  border-color:transparent;
}
.aud-ico{
  font-size:30px;
  margin-bottom:14px;
}
.aud-card h4{
  font-size:19px;
  font-weight:700;
  margin-bottom:8px;
}
.aud-card p{font-size:14.5px;color:var(--ink-soft)}

/* ===== Pricing ===== */
.pricing{
  padding:100px 32px;
  background:var(--surface);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.pr-head p{
  font-size:17px;
  color:var(--ink-soft);
  max-width:680px;
  margin:14px auto 0;
}
.pr-grid{
  max-width:var(--max);
  margin:0 auto;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.pr-card{
  background:#faf8ff;
  border-radius:var(--radius);
  padding:36px;
  border:1px solid var(--line);
  transition:.25s;
  position:relative;
}
.pr-card.highlight{
  background:var(--grad);
  color:#fff;
  border-color:transparent;
  transform:scale(1.04);
  box-shadow:var(--shadow);
}
.pr-tag{
  position:absolute;
  top:-12px;
  left:24px;
  background:#fbbf24;
  color:#7c2d12;
  padding:4px 12px;
  border-radius:99px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.06em;
}
.pr-name{
  display:block;
  font-size:13px;
  font-weight:700;
  color:var(--purple);
  letter-spacing:.14em;
  margin-bottom:10px;
  text-transform:uppercase;
}
.pr-card.highlight .pr-name{color:rgba(255,255,255,.85)}
.pr-card h3{
  font-size:36px;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:14px;
}
.pr-card p{
  font-size:14.5px;
  color:var(--ink-soft);
  margin-bottom:24px;
  min-height:80px;
}
.pr-card.highlight p{color:rgba(255,255,255,.88)}
.pr-btn{
  display:inline-block;
  background:var(--ink);
  color:#fff;
  padding:12px 22px;
  border-radius:99px;
  font-weight:600;
  font-size:14px;
  transition:.2s;
}
.pr-btn:hover{background:var(--purple)}
.pr-card.highlight .pr-btn{
  background:#fff;
  color:var(--purple);
}
.pr-card.highlight .pr-btn:hover{background:#fef3c7}

/* ===== Final CTA ===== */
.cta{
  padding:100px 32px;
  background:var(--grad);
  color:#fff;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.cta::before,.cta::after{
  content:"";
  position:absolute;
  border-radius:50%;
  background:rgba(255,255,255,.08);
}
.cta::before{width:300px;height:300px;top:-80px;left:-80px}
.cta::after{width:200px;height:200px;bottom:-60px;right:-60px}
.cta-inner{position:relative;max-width:var(--max);margin:0 auto}
.cta h2{
  font-size:clamp(34px,4.2vw,54px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.1;
  margin-bottom:30px;
}
.cta h2 em{
  font-style:normal;
  color:#fde68a;
}
.cta .btn-primary{
  background:#fff;
  color:var(--purple);
  box-shadow:0 18px 50px -10px rgba(0,0,0,.25);
}
.cta .btn-primary:hover{transform:translateY(-2px)}

/* ===== Footer ===== */
.foot{background:#0f0a1d;color:#fff;padding:60px 32px 30px}
.foot-inner{
  max-width:var(--max);
  margin:0 auto;
  display:grid;
  grid-template-columns:2fr 1fr 1fr;
  gap:40px;
}
.foot-brand img{width:34px;height:34px;border-radius:8px;display:inline-block;vertical-align:middle;margin-right:10px}
.foot-brand b{font-size:22px;font-weight:800;letter-spacing:-.02em}
.foot-brand p{margin-top:14px;color:rgba(255,255,255,.6);font-size:14px}
.foot div b{display:block;font-size:13px;letter-spacing:.12em;color:rgba(255,255,255,.85);margin-bottom:14px;text-transform:uppercase}
.foot div a{display:block;color:rgba(255,255,255,.6);font-size:14px;margin-bottom:8px;transition:.2s}
.foot div a:hover{color:#fff}
.copy{
  max-width:var(--max);
  margin:40px auto 0;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;
  color:rgba(255,255,255,.4);
  text-align:center;
}

/* ===== 下载页 (download.html) ===== */
.dl-cover{
  padding:80px 32px 60px;
  text-align:center;
  background:var(--grad-soft);
  border-bottom:1px solid var(--line);
}
.dl-cover .pill{margin-bottom:18px}
.dl-cover h1{
  font-size:clamp(40px,5vw,60px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.1;
  margin-bottom:18px;
}
.dl-cover h1 em{
  font-style:normal;
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.dl-cover .deck{font-size:17px;color:var(--ink-soft);max-width:580px;margin:0 auto 36px}
.dl-cover-img{
  max-width:520px;
  width:100%;
  margin:0 auto;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}

.dl-platforms{
  max-width:var(--max);
  margin:0 auto;
  padding:60px 32px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:22px;
}
.dl-pf{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:30px;
  text-align:center;
  transition:.25s;
}
.dl-pf:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow);
  border-color:transparent;
}
.dl-pf .pf-name{
  display:inline-block;
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--purple);
  background:var(--grad-soft);
  padding:4px 12px;
  border-radius:99px;
  margin-bottom:14px;
}
.dl-pf h3{
  font-size:22px;
  font-weight:800;
  letter-spacing:-.01em;
  margin-bottom:10px;
}
.dl-pf .pf-meta{
  font-size:13px;
  color:var(--ink-soft);
  margin-bottom:20px;
}
.dl-pf-btn{
  display:inline-block;
  background:var(--ink);
  color:#fff;
  padding:11px 22px;
  border-radius:99px;
  font-weight:600;
  font-size:13px;
  transition:.2s;
}
.dl-pf-btn:hover{background:var(--purple)}

.dl-steps{
  background:var(--surface);
  padding:80px 32px;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.dl-steps-inner{max-width:880px;margin:0 auto}
.dl-steps h2{
  font-size:38px;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:14px;
}
.dl-steps h2 em{
  font-style:normal;
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.dl-steps .deck{
  font-size:16.5px;
  color:var(--ink-soft);
  margin-bottom:40px;
}
.dl-step{
  display:grid;
  grid-template-columns:80px 1fr;
  gap:24px;
  padding:24px 0;
  border-top:1px solid var(--line);
  align-items:start;
}
.dl-step:last-child{border-bottom:1px solid var(--line)}
.dl-step .sn{
  width:56px;
  height:56px;
  border-radius:18px;
  background:var(--grad);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:800;
  font-size:20px;
}
.dl-step h4{
  font-size:20px;
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:6px;
}
.dl-step p{color:var(--ink-soft);font-size:15.5px}

.dl-req{padding:80px 32px;max-width:var(--max);margin:0 auto}
.dl-req h2{
  font-size:38px;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:14px;
}
.dl-req h2 em{
  font-style:normal;
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.dl-req .deck{font-size:16.5px;color:var(--ink-soft);margin-bottom:36px}
.req-table{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:18px;
}
.req-row{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
}
.req-row b{
  display:block;
  font-size:12px;
  letter-spacing:.18em;
  color:var(--purple);
  background:var(--grad-soft);
  padding:4px 12px;
  border-radius:99px;
  margin-bottom:14px;
  font-weight:700;
  width:fit-content;
}
.req-row span{font-size:15px;color:var(--ink-soft);line-height:1.6}

/* ===== 响应式 ===== */
@media (max-width:980px){
  .topbar{padding:14px 20px}
  nav{gap:18px;font-size:13px}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero{padding:40px 20px 60px}
  .why-grid,.aud-grid,.pr-grid,.dl-platforms,.req-table{grid-template-columns:1fr 1fr}
  .row,.row.reverse{grid-template-columns:1fr;gap:30px}
  .row.reverse .row-img{order:0}
  .feature-list{gap:50px}
  .row-text h3{font-size:28px}
  .pr-card.highlight{transform:none}
  .foot-inner{grid-template-columns:1fr;gap:30px}
}
@media (max-width:560px){
  body{font-size:15px}
  nav a:not(.btn-nav){display:none}
  .why-grid,.aud-grid,.pr-grid,.dl-platforms,.req-table{grid-template-columns:1fr}
  .hero-text h1{font-size:38px}
  .b1{left:4%}.b2{right:6%}.b3{display:none}
  .dl-cover h1,.dl-steps h2,.dl-req h2{font-size:30px}
}