:root{
  --primary:#FF5C8A;
  --primary-deep:#F03D74;
  --primary-soft:#FFE4EE;
  --deep:#2A1A3D;
  --text:#3E2C50;
  --muted:#6F5E7C;
  --bg:#FFF9FB;
  --bg-soft:#FFF0F6;
  --card:#FFFFFF;
  --border:#F4D8E5;
  --green:#2EC57E;
  --radius:18px;
  --shadow:0 10px 30px rgba(240,61,116,.08);
  --shadow-hover:0 18px 42px rgba(240,61,116,.16);
  --nav-h:70px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--nav-h)}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit}
::selection{background:var(--primary-soft);color:var(--deep)}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.btn{display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border-radius:999px;font-weight:600;border:0;cursor:pointer;transition:transform .25s,box-shadow .25s;white-space:nowrap}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn:active{transform:translateY(0)}

.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,249,251,.92);backdrop-filter:blur(8px);border-bottom:1px solid transparent;transition:box-shadow .25s,border-color .25s}
.nav.scrolled{box-shadow:0 6px 24px rgba(240,61,116,.1);border-color:var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h)}
.logo{display:inline-flex;align-items:center;gap:8px}
.logo-ico{width:24px;height:24px;color:var(--primary)}
.logo-text{font-size:22px;font-weight:800;color:var(--deep);letter-spacing:.5px}
.menu{display:flex;gap:24px}
.menu-link{font-size:14px;color:var(--text);font-weight:500;padding:8px 0;position:relative;transition:color .2s}
.menu-link:hover{color:var(--primary)}
.menu-link::after{content:"";position:absolute;left:0;bottom:2px;width:0;height:2px;background:var(--primary);border-radius:2px;transition:width .25s}
.menu-link:hover::after{width:100%}
.btn-nav{font-size:13px;padding:6px 16px;height:31px}

.hero{padding:calc(var(--nav-h) + 52px) 0 72px;background:linear-gradient(160deg,#FFE9F2 0%,#F6EBFF 55%,#FFF9FB 100%)}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.hero-copy h1{font-size:46px;line-height:1.22;color:var(--deep);font-weight:800;letter-spacing:.5px}
.ver-badge{display:inline-block;vertical-align:middle;margin-left:12px;font-size:15px;font-weight:700;color:var(--primary-deep);background:var(--primary-soft);border:1px solid var(--border);padding:4px 12px;border-radius:999px;letter-spacing:.5px}
.hero-desc{margin-top:18px;font-size:17px;color:var(--muted);max-width:540px}
.hero-btn{margin-top:30px;padding:14px 36px;font-size:16px}

.chat{background:var(--card);border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow-hover);overflow:hidden;display:flex;flex-direction:column}
.chat-head{display:flex;align-items:center;gap:12px;padding:12px 16px;background:linear-gradient(90deg,var(--primary-soft),#F6EFFF);border-bottom:1px solid var(--border)}
.chat-avatar{border-radius:50%;object-fit:cover}
.chat-user{display:flex;flex-direction:column;line-height:1.35}
.chat-name{font-size:15px;font-weight:700;color:var(--deep)}
.chat-status{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:5px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--green);display:inline-block;position:relative}
.dot::after{content:"";position:absolute;inset:-3px;border-radius:50%;border:1px solid var(--green);opacity:.5;animation:pulse 1.8s infinite}
@keyframes pulse{0%{transform:scale(.6);opacity:.6}70%{transform:scale(1.4);opacity:0}100%{opacity:0}}
.chat-body{height:330px;overflow-y:auto;padding:16px;background:#FDF4FA;display:flex;flex-direction:column;gap:12px}
.msg{display:flex;gap:8px;max-width:82%}
.msg.me{align-self:flex-end;flex-direction:row-reverse}
.msg-avatar{width:30px;height:30px;border-radius:50%;object-fit:cover;flex:none;align-self:flex-end}
.bubble{padding:10px 14px;border-radius:16px;font-size:14px;line-height:1.55;word-break:break-word}
.msg.ai .bubble{background:var(--card);border:1px solid var(--border);border-top-left-radius:4px}
.msg.me .bubble{background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border-top-right-radius:4px}
.chat-input{display:flex;align-items:center;gap:10px;padding:12px;background:var(--card);border-top:1px solid var(--border)}
.chat-input input{flex:1;border:1px solid var(--border);border-radius:999px;padding:10px 16px;font-size:14px;color:var(--muted);background:var(--bg);outline:none;height:42px;min-width:0}
.send-btn{flex:none;width:42px;height:42px;border-radius:50%;border:0;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .2s,background .25s}
.send-btn svg{width:18px;height:18px}
.send-btn:hover{transform:scale(1.06)}
.send-btn.off{background:#D9C9D6;cursor:not-allowed}
.send-btn.off:hover{transform:none}

.personas{margin-top:60px;text-align:center}
.personas-title{font-size:22px;font-weight:700;color:var(--deep);margin-bottom:26px}
.persona-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px;max-width:780px;margin:0 auto}
.persona{display:flex;flex-direction:column;align-items:center;gap:10px;cursor:pointer}
.persona img{border-radius:50%;border:3px solid var(--card);box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.persona:hover img{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.persona figcaption{font-size:14px;font-weight:600;color:var(--text);background:var(--card);border:1px solid var(--border);padding:5px 14px;border-radius:999px}

.sec{padding:88px 0}
.sec-soft{background:var(--bg-soft)}
.sec-head{text-align:center;margin-bottom:48px}
.sec-head h2{font-size:32px;font-weight:800;color:var(--deep);letter-spacing:.5px}
.sec-sub{margin-top:10px;color:var(--muted);font-size:16px}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{padding:32px 28px;position:relative;overflow:hidden}
.step::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary),var(--primary-deep));opacity:0;transition:opacity .25s}
.step:hover::before{opacity:1}
.step-num{display:inline-block;font-size:13px;font-weight:700;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;padding:4px 14px}
.step h3{margin-top:16px;font-size:20px;color:var(--deep)}
.step p{margin-top:10px;color:var(--muted);font-size:15px}

.about{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;aspect-ratio:1;object-fit:cover}
.about-copy h2{font-size:30px;font-weight:800;color:var(--deep);line-height:1.3}
.about-lead{margin-top:16px;color:var(--muted);font-size:16px}
.check-list{margin-top:26px;display:flex;flex-direction:column;gap:14px}
.check-list li{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:500}
.check-list svg{width:22px;height:22px;color:var(--green);flex:none}

.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feat{padding:28px 24px}
.feat-ico{width:52px;height:52px;border-radius:16px;background:var(--primary-soft);color:var(--primary-deep);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feat-ico svg{width:26px;height:26px}
.feat h3{font-size:18px;color:var(--deep)}
.feat-pain{margin-top:8px;font-size:14px;color:var(--primary-deep);background:var(--primary-soft);border-radius:10px;padding:6px 10px;font-weight:500;line-height:1.5}
.feat>p:last-child{margin-top:10px;font-size:14.5px;color:var(--muted)}

.cmp-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.cmp-scroll::-webkit-scrollbar{height:6px}
.cmp-scroll::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
.cmp{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.cmp-row{display:grid;grid-template-columns:130px 1fr 1fr 1fr}
.cmp-dim,.cmp-cell{padding:15px 16px;font-size:14.5px;border-top:1px solid var(--border);display:flex;align-items:center;gap:8px}
.cmp-head .cmp-dim,.cmp-head .cmp-cell{border-top:0;font-weight:700;color:var(--deep);background:#F3E9F8;justify-content:center;text-align:center}
.cmp-head .cmp-me{color:var(--primary-deep);font-weight:800}
.cmp-dim{font-weight:600;color:var(--deep);background:#F3E9F8;border-right:1px solid var(--border)}
.cmp-cell{background:var(--card);border-left:1px solid var(--border)}
.cmp-cell.cmp-me{background:#FFF5F9;font-weight:500}
.tick{width:18px;height:18px;border-radius:50%;background:var(--green);position:relative;flex:none;display:inline-block}
.tick::after{content:"";position:absolute;left:5px;top:3px;width:5px;height:9px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}
.cmp-hint{display:none;text-align:center;margin-top:14px;font-size:14px;color:var(--muted)}

.scene-list{max-width:840px;margin:0 auto 56px;display:flex;flex-direction:column;gap:14px}
.scene-list li{display:flex;align-items:center;gap:14px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px 22px;font-size:16px;font-weight:500;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.scene-list li:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.tick-lg{width:24px;height:24px;flex:none}
.vs-wrap{display:grid;grid-template-columns:1fr auto 1fr;gap:22px;align-items:center;max-width:980px;margin:0 auto}
.vs-card{padding:30px 28px}
.vs-card h3{font-size:19px;color:var(--deep);margin-bottom:16px}
.vs-card li{display:flex;gap:10px;align-items:flex-start;padding:8px 0;font-size:15px;color:var(--muted)}
.vs-card li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);flex:none;margin-top:9px}
.vs-win{border-color:var(--primary);background:linear-gradient(160deg,#FFF5F9,var(--card))}
.vs-badge{width:58px;height:58px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-weight:800;font-size:16px;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-hover);letter-spacing:1px}

.data{background:var(--deep);padding:88px 0}
.sec-head-light h2{color:#fff}
.sec-head-light .sec-sub{color:rgba(255,255,255,.65)}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.data-item{text-align:center;padding:20px}
.data-num{font-size:44px;font-weight:800;line-height:1.15;background:linear-gradient(90deg,#FF9BB8,#E9A6FF);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:block}
.data-label{margin-top:8px;font-size:15px;color:rgba(255,255,255,.72)}

.custom{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.custom-copy h2{font-size:32px;font-weight:800;color:var(--deep);line-height:1.3}
.custom-lead{margin-top:16px;color:var(--muted);font-size:16px}
.custom .btn{margin-top:28px;padding:14px 32px;font-size:16px}
.custom-img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;aspect-ratio:1;object-fit:cover}

.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{padding:26px 24px}
.review-top{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.review-avatar{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:none}
.review-name{font-size:15px;font-weight:700;color:var(--deep)}
.review-stars{font-size:13px;color:#FFB547;letter-spacing:2px}
.review>p:last-child{font-size:14.5px;color:var(--muted)}

.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.priv{padding:28px 24px}
.priv-ico{width:52px;height:52px;border-radius:16px;background:var(--primary-soft);color:var(--primary-deep);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.priv-ico svg{width:26px;height:26px}
.priv h3{font-size:18px;color:var(--deep)}
.priv p{margin-top:10px;font-size:14.5px;color:var(--muted)}

.version{max-width:820px;margin:0 auto;padding:36px 40px}
.ver-head{display:flex;align-items:center;gap:16px;padding-bottom:18px;border-bottom:1px solid var(--border);margin-bottom:18px}
.ver-tag{font-size:18px;font-weight:800;color:#fff;background:linear-gradient(90deg,var(--primary),var(--primary-deep));padding:6px 16px;border-radius:999px}
.ver-date{font-size:14px;color:var(--muted)}
.ver-log li{display:flex;gap:10px;padding:10px 0;font-size:15px}
.ver-log li+li{border-top:1px dashed var(--border)}
.ver-log b{color:var(--primary-deep);font-weight:700;flex:none}

.faq{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.faq-item{overflow:hidden}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;background:none;border:0;cursor:pointer;padding:20px 24px;font-size:16px;font-weight:600;color:var(--deep);text-align:left}
.faq-arrow{flex:none;color:var(--primary);display:flex;transition:transform .3s}
.faq-arrow svg{width:20px;height:20px}
.faq-item.open .faq-arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 24px 20px;font-size:15px;color:var(--muted)}

.download{padding:88px 0;background:linear-gradient(160deg,#FFE9F2,#F6EBFF)}
.download-card{max-width:720px;margin:0 auto;text-align:center;padding:52px 40px}
.download-card h1{font-size:38px;color:var(--deep);font-weight:800;letter-spacing:.5px}
.download-meta{margin-top:14px;font-size:14px;color:var(--muted)}
.download-btns{display:flex;justify-content:center;gap:20px;margin-top:30px}
.download-btns .btn{padding:15px 30px;font-size:16px;min-height:52px}
.btn-ghost{background:var(--card);color:var(--primary-deep);border:2px solid var(--primary)}
.btn-ghost:hover{background:var(--primary-soft)}
.download-tip{margin-top:22px;font-size:14px;color:var(--muted);display:flex;align-items:center;justify-content:center;gap:6px}

.footer{padding:36px 0;background:var(--deep);color:rgba(255,255,255,.6);text-align:center;font-size:14px}
.footer-link{color:#fff;font-weight:700}
.footer-link:hover{color:var(--primary-soft)}

.to-top{position:fixed;right:28px;bottom:32px;width:46px;height:46px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border:0;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-hover);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,visibility .3s,transform .3s;z-index:90}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top svg{width:20px;height:20px}

@media (max-width:1100px){
  .persona-grid{grid-template-columns:repeat(3,1fr)}
  .feat-grid,.privacy-grid,.data-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .hero-copy h1{font-size:40px}
  .sec-head h2{font-size:28px}
  .menu{gap:18px}
}
@media (max-width:900px){
  .menu{display:none}
  .hero-grid{grid-template-columns:1fr;gap:42px}
  .hero{padding-top:calc(var(--nav-h) + 36px)}
  .about,.custom{grid-template-columns:1fr;gap:42px}
  .steps{grid-template-columns:1fr}
  .vs-wrap{grid-template-columns:1fr}
  .vs-badge{margin:0 auto}
  .review-grid{grid-template-columns:1fr}
  .custom .btn{display:flex;width:fit-content;margin:28px auto 0}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .sec{padding:64px 0}
  .sec-head{margin-bottom:36px}
  .cmp{min-width:720px}
  .cmp-dim,.cmp-cell{font-size:14px;padding:13px 14px}
  .cmp-hint{display:block}
  .download-btns{flex-direction:column;gap:14px}
  .download-btns .btn{width:100%}
  .download-meta{font-size:12.5px;white-space:nowrap}
  .to-top{right:16px;bottom:20px;width:44px;height:44px}
  .hero-btn{width:100%}
  .btn-nav{height:44px;font-size:14px}
  .logo{padding:8px 0}
  .logo-text{font-size:24px}
  .chat-input input{height:44px}
  .send-btn{width:44px;height:44px}
}
@media (max-width:640px){
  .feat-grid,.privacy-grid{grid-template-columns:1fr}
  .chat-body{height:280px}
  .hero-copy h1{font-size:31px}
  .sec-head h2{font-size:25px}
  .data-grid{gap:14px}
  .data-num{font-size:32px}
  .ver-badge{font-size:13px;padding:3px 10px}
  .download-card{padding:40px 22px}
  .download-card h1{font-size:28px}
  .personas-title{font-size:20px}
  .chat-input input{font-size:16px}
}