: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);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
ul{list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:88px 0}

.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);transition:box-shadow .3s}
.nav.scrolled{box-shadow:0 6px 24px rgba(240,61,116,.10)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:inline-flex;align-items:center;min-height:46px;font-size:24px;font-weight:800;letter-spacing:-.5px;background:linear-gradient(90deg,var(--primary),var(--primary-deep));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.menu{display:flex;align-items:center;gap:4px}
.menu a{font-size:15px;font-weight:500;color:var(--text);padding:8px 14px;border-radius:8px;transition:color .25s,background .25s}
.menu a:hover{color:var(--primary);background:var(--primary-soft)}
.btn-nav{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;font-size:14px;font-weight:700;transition:transform .25s,box-shadow .25s}
.btn-nav:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}

.hero{padding:150px 0 76px;background:radial-gradient(720px 420px at 12% 8%,var(--primary-soft) 0,rgba(255,228,238,0) 70%),radial-gradient(640px 420px at 88% 88%,#F3E4FF 0,rgba(243,228,255,0) 70%),linear-gradient(180deg,#fff,var(--bg))}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-copy h1{font-size:46px;line-height:1.25;font-weight:800;color:var(--deep);letter-spacing:-1px}
.hero-copy h1 .logo-grad{background:linear-gradient(90deg,var(--primary),var(--primary-deep));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.ver{display:inline-block;vertical-align:middle;margin-left:10px;padding:4px 14px;font-size:15px;font-weight:700;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;letter-spacing:0}
.hero-desc{margin:20px 0 30px;font-size:17px;color:var(--muted);max-width:520px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:15px 38px;font-size:17px;font-weight:700;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.btn-nav,.btn,.dl-btn,.send{color:#fff;background:linear-gradient(90deg,var(--primary),var(--primary-deep));border-radius:999px}
.btn:hover,.dl-btn:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}

.chat{max-width:430px;margin-left:auto;width:100%;background:var(--card);border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow-hover);overflow:hidden}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 16px;background:var(--card);border-bottom:1px solid var(--border)}
.chat-head img{width:44px;height:44px;border-radius:50%;object-fit:cover;border:2px solid var(--primary-soft)}
.chat-head-info{line-height:1.4}
.chat-name{font-size:15px;font-weight:700;color:var(--deep)}
.chat-status{font-size:12px;color:var(--green);display:flex;align-items:center;gap:5px}
.dot{width:7px;height:7px;border-radius:50%;background:var(--green);animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(46,197,126,.5)}50%{opacity:.7;box-shadow:0 0 0 5px rgba(46,197,126,0)}}
.chat-body{height:318px;padding:16px;overflow-y:auto;background:var(--bg-soft);display:flex;flex-direction:column;gap:12px;scrollbar-width:thin}
.bubble{max-width:82%;padding:10px 15px;font-size:14px;line-height:1.65;border-radius:16px;animation:rise .35s ease}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.bubble.ai{align-self:flex-start;background:var(--card);border:1px solid var(--border);border-top-left-radius:4px;color:var(--text)}
.bubble.user{align-self:flex-end;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border-top-right-radius:4px}
.bubble.typing{display:flex;gap:5px;align-items:center;min-height:38px}
.bubble.typing span{width:6px;height:6px;border-radius:50%;background:#D9A9C4;animation:blink 1.2s infinite}
.bubble.typing span:nth-child(2){animation-delay:.2s}
.bubble.typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.3;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}
.chat-input{display:flex;align-items:center;gap:10px;padding:12px 14px;background:var(--card);border-top:1px solid var(--border)}
.chat-input input{flex:1;min-width:0;height:42px;padding:0 18px;border:1px solid var(--border);border-radius:999px;background:var(--bg-soft);font-size:14px;color:var(--muted);font-family:inherit}
.chat-input input:focus{outline:none;border-color:var(--primary)}
.send{flex:none;width:76px;height:44px;border:none;font-size:14px;font-weight:700;transition:transform .25s,box-shadow .25s,background .25s}
.send:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.send.disabled{background:#E7DCEB;color:#B8A9BE;cursor:not-allowed;box-shadow:none;transform:none}

.personas{margin-top:64px;text-align:center}
.personas-title{font-size:20px;font-weight:700;color:var(--deep);margin-bottom:26px}
.personas-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px}
.persona,.step,.feat,.vs-card,.rev,.privacy-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.persona:hover,.step:hover,.feat:hover,.vs-card:hover,.rev:hover,.privacy-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.persona{padding:16px 12px 14px}
.persona img{width:100%;aspect-ratio:1;border-radius:50%;object-fit:cover}
.persona span{display:block;margin-top:12px;font-size:14px;font-weight:600;color:var(--deep)}
.persona-custom{border-color:var(--primary);background:linear-gradient(180deg,var(--primary-soft),var(--card))}

.sec-head{text-align:center;max-width:760px;margin:0 auto 48px}
.sec-tag{display:inline-block;padding:5px 16px;font-size:13px;font-weight:700;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;margin-bottom:14px}
.sec-head h2{font-size:34px;font-weight:800;color:var(--deep);line-height:1.3}
.sec-sub{margin-top:12px;font-size:16px;color:var(--muted)}

.steps{background:var(--bg)}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{padding:36px 28px;text-align:center}
.step-num,.vs-badge,.rev-ava,.to-top{display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;border-radius:50%}
.step-num{width:56px;height:56px;margin:0 auto 18px}
.step h3{font-size:19px;font-weight:700;color:var(--deep);margin-bottom:10px}
.step p{font-size:14.5px;color:var(--muted)}

.intro{background:var(--bg-soft)}
.intro-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:60px;align-items:center}
.intro-img,.custom-img{width:100%;border-radius:22px;border:1px solid var(--border);box-shadow:var(--shadow-hover)}
.intro-copy .sec-tag,.custom-copy .sec-tag{margin-bottom:14px}
.intro-copy h2,.custom-copy h2{font-size:34px;font-weight:800;color:var(--deep);margin-bottom:18px;line-height:1.3}
.intro-copy>p,.custom-copy p{font-size:16px;color:var(--text)}
.intro-copy>p{margin-bottom:22px}
.intro-list li{display:flex;align-items:flex-start;gap:12px;font-size:16px;color:var(--text);padding:12px 0;border-bottom:1px dashed var(--border)}
.intro-list li:last-child{border-bottom:none}
.check{flex:none;width:24px;height:24px;margin-top:2px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff}

.features{background:var(--bg)}
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feat{padding:30px 24px}
.feat-icon{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary-deep);margin-bottom:18px}
.feat h3{font-size:18px;font-weight:700;color:var(--deep);margin-bottom:10px}
.feat-pain{display:inline-block;padding:4px 12px;font-size:12.5px;font-weight:600;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;margin-bottom:12px}
.feat p{font-size:14px;color:var(--muted)}

.compare{background:var(--bg-soft)}
.cmp-wrap{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow-x:auto;-webkit-overflow-scrolling:touch}
.cmp-table{width:100%;min-width:640px;border-collapse:collapse;table-layout:fixed}
.cmp-table th,.cmp-table td{padding:16px 20px;font-size:14.5px;text-align:left;vertical-align:middle}
.cmp-table thead th{background:var(--deep);color:#fff;font-size:15px;font-weight:700}
.cmp-table thead .th-hot{background:linear-gradient(90deg,var(--primary),var(--primary-deep))}
.cmp-table tbody td{border-top:1px solid var(--border);color:var(--text)}
.cmp-table tbody tr:hover td{background:var(--primary-soft)}
.cmp-table tbody td:first-child{font-weight:700;color:var(--deep);background:var(--bg-soft)}
.cmp-table tbody tr:hover td:first-child{background:#FBDCE9}
.cmp-table tbody .td-hot{color:var(--primary-deep);font-weight:600}
.cmp-hint{display:none;text-align:center;font-size:12.5px;color:var(--muted);padding:12px 0 16px}

.scenes{background:var(--bg)}
.scene-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;max-width:980px;margin:0 auto}
.scene-list li{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:15px 18px;font-size:15px;color:var(--text);box-shadow:var(--shadow)}
.vs{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:52px;max-width:980px;margin-left:auto;margin-right:auto}
.vs-badge{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:52px;height:52px;font-size:15px;font-weight:800;box-shadow:var(--shadow-hover);z-index:2;border:3px solid #fff}
.vs-card{padding:32px 28px}
.vs-card h3{font-size:19px;font-weight:800;margin-bottom:18px;text-align:center}
.vs-bad{background:#F8F4F7}
.vs-bad h3{color:var(--muted)}
.vs-good{border-color:var(--primary);background:linear-gradient(180deg,var(--primary-soft),var(--card))}
.vs-good h3{color:var(--primary-deep)}
.vs-card li{display:flex;align-items:flex-start;gap:10px;padding:9px 0;font-size:15px;color:var(--text)}
.x{flex:none;width:22px;height:22px;margin-top:2px;border-radius:50%;display:grid;place-items:center;background:#E8E2EC;color:#A99BB3;font-size:14px;font-weight:700;line-height:1}
.vs-good .check{width:22px;height:22px;margin-top:2px}

.stats{background:linear-gradient(135deg,var(--deep),#3A2450);color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-num{font-size:46px;font-weight:800;line-height:1.2;background:linear-gradient(90deg,#FFA9C3,var(--primary));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.stat-label{margin-top:8px;font-size:14px;color:rgba(255,255,255,.75)}

.custom{background:var(--bg-soft)}
.custom-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:60px;align-items:center}
.custom-copy p{margin-bottom:28px}

.reviews{background:var(--bg)}
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rev{padding:28px 26px}
.rev-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.rev-ava{flex:none;width:48px;height:48px;font-size:20px;font-weight:800}
.rev-name{font-size:15px;font-weight:700;color:var(--deep)}
.rev-stars{font-size:13px;color:#FFB800;letter-spacing:2px;margin-top:2px}
.rev-text{font-size:14.5px;color:var(--text);line-height:1.8}

.privacy{background:var(--bg-soft)}
.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.privacy-card{padding:30px 24px}
.privacy-card h3{font-size:18px;font-weight:700;color:var(--deep);margin-bottom:10px}
.privacy-card p{font-size:14px;color:var(--muted)}

.version{background:var(--bg)}
.version-card{max-width:680px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:40px 36px}
.ver-top{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-bottom:18px;border-bottom:1px solid var(--border)}
.ver-no{font-size:36px;font-weight:800;background:linear-gradient(90deg,var(--primary),var(--primary-deep));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.ver-date{font-size:14px;color:var(--muted)}
.ver-list{margin-top:10px}
.ver-list li{display:flex;align-items:flex-start;gap:12px;padding:13px 0;font-size:15px;color:var(--text);border-bottom:1px dashed var(--border)}
.ver-list li:last-child{border-bottom:none}
.ver-badge{flex:none;padding:2px 10px;font-size:12px;font-weight:700;border-radius:999px;background:var(--primary-soft);color:var(--primary-deep);margin-top:2px}

.faq{background:var(--bg-soft)}
.faq-list{max-width:760px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);margin-bottom:16px;overflow:hidden;transition:box-shadow .25s}
.faq-item.open{box-shadow:var(--shadow-hover)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:20px 24px;background:var(--card);border:none;text-align:left;font-size:16px;font-weight:700;color:var(--deep);transition:background .25s}
.faq-q:hover{background:var(--primary-soft)}
.faq-icon{flex:none;display:grid;place-items:center;color:var(--primary);transition:transform .3s}
.faq-item.open .faq-icon{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 24px 20px;font-size:14.5px;color:var(--muted);line-height:1.85}

.download{background:linear-gradient(180deg,var(--bg-soft),var(--bg));text-align:center}
.download h1{font-size:42px;font-weight:800;color:var(--deep);letter-spacing:-1px}
.dl-meta{margin:14px 0 30px;font-size:13px;color:var(--muted)}
.dl-btns{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
.dl-btn{display:inline-flex;align-items:center;justify-content:center;min-width:260px;padding:16px 40px;font-size:16px;font-weight:700;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.dl-tip{display:inline-block;margin-top:24px;padding:9px 22px;font-size:14.5px;color:var(--muted);background:var(--card);border:1px solid var(--border);border-radius:999px;box-shadow:var(--shadow)}

.footer{background:var(--deep);color:rgba(255,255,255,.78);padding:44px 0;text-align:center}
.footer-brand{font-size:19px;font-weight:800}
.footer-brand a{color:#FFA9C3;text-decoration:none;transition:opacity .25s}
.footer-brand a:hover{opacity:.85}
.footer-copy{margin-top:10px;font-size:13.5px;color:rgba(255,255,255,.55)}

.to-top{position:fixed;right:24px;bottom:28px;z-index:90;width:46px;height:46px;border:none;box-shadow:var(--shadow-hover);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,transform .3s,visibility .3s}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{transform:translateY(-3px)}

@media (max-width:1100px){
  .hero-copy h1{font-size:38px}
  .personas-grid{grid-template-columns:repeat(3,1fr)}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .privacy-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .rev-grid{grid-template-columns:repeat(2,1fr)}
  .hero-grid{gap:40px}
  .stat-num{font-size:40px}
  .sec-head h2{font-size:30px}
}

@media (max-width:900px){
  .menu{display:none}
  .hero{padding-top:120px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-copy{text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .chat{margin:0 auto}
  .intro-grid{grid-template-columns:1fr;gap:36px}
  .custom-grid{grid-template-columns:1fr;gap:36px}
  .custom-copy{order:1}
  .custom-img{order:2}
  .intro-img{order:1}
  .intro-copy{order:2}
  .vs{grid-template-columns:1fr;gap:20px}
  .vs-badge{display:none}
}

@media (max-width:768px){
  .wrap{padding:0 20px}
  section{padding:64px 0}
  .nav-inner{padding:0 20px}
  .logo{font-size:21px}
  .btn-nav{padding:0 14px;font-size:13px}
  .hero-copy h1{font-size:32px}
  .hero-desc{font-size:15px}
  .btn-hero{width:100%}
  .custom-copy .btn{width:100%}
  .personas{margin-top:48px}
  .cmp-hint{display:block}
  .scene-list{grid-template-columns:1fr}
  .dl-meta{font-size:12px;white-space:nowrap}
  .dl-btns{flex-direction:column;align-items:stretch}
  .dl-btn{min-width:0;width:100%}
  .sec-head h2{font-size:26px}
  .download h1{font-size:30px}
}

@media (max-width:640px){
  .feat-grid{grid-template-columns:1fr}
  .rev-grid{grid-template-columns:1fr}
  .privacy-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr;gap:28px}
  .chat-body{height:244px}
  .chat-input input{font-size:16px}
  .steps-grid{grid-template-columns:1fr}
  .personas-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .hero-copy h1{font-size:28px}
  .ver{font-size:13px;padding:3px 10px}
  .to-top{right:16px;bottom:20px;width:42px;height:42px}
}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.bubble,.to-top,.step-num{animation:none;transition:none}}