: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);
  --grad:linear-gradient(90deg,var(--primary),var(--primary-deep));
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:84px 0}
.bg-soft{background:var(--bg-soft)}
.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:var(--grad);color:#fff;border-radius:999px;font-size:16px;font-weight:700;padding:14px 34px;box-shadow:0 10px 26px rgba(240,61,116,.28);transition:transform .25s,box-shadow .25s;text-align:center;white-space:nowrap}
.btn:hover{transform:translateY(-3px);box-shadow:0 16px 36px rgba(240,61,116,.38)}
.btn-lg{padding:16px 40px;font-size:17px}
.btn-ghost{background:#fff;color:var(--primary-deep);border:2px solid var(--primary);box-shadow:none}
.btn-ghost:hover{background:var(--primary-soft);box-shadow:var(--shadow-hover)}

.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,249,251,.94);border-bottom:1px solid transparent;transition:box-shadow .3s,border-color .3s}
.nav.is-scrolled{border-color:var(--border);box-shadow:0 6px 24px rgba(42,26,61,.06)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{font-size:20px;font-weight:800;color:var(--deep);white-space:nowrap}
.logo span{color:var(--primary);font-size:15px;font-weight:700;margin-left:4px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{padding:8px 14px;font-size:14.5px;color:var(--text);border-radius:999px;transition:color .2s,background .2s}
.nav-links a:hover{color:var(--primary-deep);background:var(--primary-soft)}
.btn-nav{font-size:13px;padding:10px 18px;background:var(--grad);color:#fff;border-radius:999px;font-weight:700;transition:transform .2s,box-shadow .2s;white-space:nowrap}
.btn-nav:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}

.hero{background:linear-gradient(180deg,#FFF6FA 0%,var(--bg) 100%);padding:128px 0 84px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-badge{display:inline-block;background:var(--primary-soft);color:var(--primary-deep);font-size:13px;font-weight:700;padding:6px 14px;border-radius:999px;margin-bottom:18px}
.hero h1{font-size:56px;line-height:1.15;color:var(--deep);font-weight:900;letter-spacing:-1px}
.hero h1 .ver{font-size:26px;color:var(--primary);font-weight:800;vertical-align:middle;margin-left:10px;letter-spacing:0}
.hero-desc{margin:18px 0 28px;font-size:16px;color:var(--text);max-width:520px}
.hero-note{margin-top:14px;font-size:13px;color:var(--muted)}

.chat{overflow:hidden;background:var(--card);border:1px solid var(--border);border-radius:22px;box-shadow:0 18px 50px rgba(42,26,61,.12)}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 18px;background:var(--grad);color:#fff}
.chat-avatar{width:46px;height:46px;border-radius:50%;object-fit:cover;border:2px solid rgba(255,255,255,.85)}
.chat-user{display:flex;flex-direction:column;line-height:1.35}
.chat-user strong{font-size:16px}
.chat-status{font-size:12px;opacity:.95;display:flex;align-items:center;gap:6px}
.dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(46,197,126,.3);display:inline-block}
.chat-body{height:330px;overflow-y:auto;padding:18px 16px;background:var(--bg-soft);display:flex;flex-direction:column;gap:12px}
.msg{max-width:78%;padding:10px 14px;font-size:14px;line-height:1.6;border-radius:16px;animation:pop .3s ease}
.msg.ai{align-self:flex-start;background:var(--card);border:1px solid var(--border);color:var(--text);border-bottom-left-radius:4px}
.msg.me{align-self:flex-end;background:var(--grad);color:#fff;border-bottom-right-radius:4px}
@keyframes pop{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.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;border:1px solid var(--border);border-radius:999px;padding:0 18px;font-size:16px;background:var(--bg);color:var(--text);outline:none;cursor:default}
.chat-input input::placeholder{color:var(--muted)}
.send-btn{height:42px;padding:0 20px;border-radius:999px;background:var(--grad);color:#fff;font-size:14px;font-weight:700;transition:transform .2s,box-shadow .2s}
.send-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.send-btn.is-off{background:#E3D3DC;box-shadow:none;transform:none;cursor:default;pointer-events:none}

.persona-wrap{margin-top:56px}
.persona-title{font-size:24px;font-weight:800;color:var(--deep);text-align:center;margin-bottom:26px}
.persona-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px}
.persona{padding:16px;text-align:center}
.persona img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:16px;background:var(--bg-soft)}
.persona span{display:block;margin-top:10px;font-size:13.5px;font-weight:600;color:var(--text)}

.sec-title{font-size:34px;font-weight:900;color:var(--deep);text-align:center;line-height:1.3}
.sec-title.light{color:#fff}
.sec-title.left{text-align:left}
.sec-sub{text-align:center;color:var(--muted);font-size:15px;margin-top:10px;margin-bottom:44px}
.eyebrow{display:inline-block;background:var(--primary-soft);color:var(--primary-deep);font-size:13px;font-weight:700;padding:5px 14px;border-radius:999px;margin-bottom:14px}

.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{position:relative;padding:36px 28px 30px}
.step-num{position:absolute;top:22px;right:24px;font-size:46px;font-weight:900;color:var(--primary-soft);line-height:1}
.step-icon{width:48px;height:48px;color:var(--primary);margin-bottom:16px}
.step h3{font-size:20px;color:var(--deep);margin-bottom:10px}
.step p{font-size:14.5px;color:var(--muted)}

.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.intro-desc{margin:18px 0 22px;font-size:15.5px;color:var(--text)}
.intro-list{list-style:none;display:flex;flex-direction:column;gap:14px}
.intro-list li{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:600;color:var(--deep)}
.intro-list svg{width:22px;height:22px;color:var(--green);flex-shrink:0}
.intro-fig img{width:100%;border-radius:24px;box-shadow:var(--shadow)}

.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature{padding:30px 26px}
.feature-icon{width:46px;height:46px;color:var(--primary);margin-bottom:16px}
.feature h3{font-size:19px;color:var(--deep);margin-bottom:10px}
.pain{font-size:13px;color:var(--primary-deep);background:var(--primary-soft);border-radius:10px;padding:8px 12px;margin-bottom:12px;line-height:1.55}
.feature-desc{font-size:14px;color:var(--muted)}

.table-scroll{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow)}
.cmp-table{width:100%;min-width:640px;border-collapse:separate;border-spacing:0;font-size:14px;background:var(--card)}
.cmp-table th{background:var(--deep);color:#fff;padding:15px 16px;font-weight:700;text-align:left;white-space:nowrap}
.cmp-table th.col-mei{background:var(--grad)}
.cmp-table td{padding:14px 16px;border-top:1px solid var(--border);color:var(--text);white-space:nowrap}
.cmp-table tbody tr:nth-child(even) td{background:#FFFAFC}
.cmp-table td.col-mei{background:var(--primary-soft);color:var(--primary-deep);font-weight:700}
.cmp-table tbody tr td:first-child{background:var(--bg-soft);font-weight:700;color:var(--deep)}
.scroll-hint{display:none;text-align:center;font-size:12.5px;color:var(--muted);margin-top:12px}

.scene-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:14px 28px;max-width:940px;margin:0 auto 48px}
.scene-list li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--text);background:var(--card);border:1px solid var(--border);border-radius:14px;padding:13px 16px}
.scene-list svg{width:20px;height:20px;color:var(--green);flex-shrink:0;margin-top:3px}
.vs-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:stretch;max-width:980px;margin:0 auto}
.vs-card{padding:30px 28px}
.vs-card h3{font-size:20px;margin-bottom:16px}
.vs-card ul{list-style:none;display:flex;flex-direction:column;gap:12px}
.vs-card li{font-size:14.5px;color:var(--text);padding-left:20px;position:relative}
.vs-card li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;background:var(--primary)}
.vs-left h3{color:var(--muted)}
.vs-right h3{color:var(--primary-deep)}
.vs-right{background:linear-gradient(180deg,#FFF6FA,var(--card))}
.vs-badge{align-self:center;width:56px;height:56px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;box-shadow:0 10px 26px rgba(240,61,116,.32)}
.vs-badge span{color:#fff;font-weight:900;font-size:16px;letter-spacing:1px}

.stats{background:var(--deep);padding:84px 0;position:relative;overflow:hidden}
.stats .sec-title{margin-bottom:44px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{text-align:center;padding:30px 16px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius)}
.stat strong{display:block;font-size:44px;font-weight:900;color:var(--primary);line-height:1.1}
.stat-label{display:block;margin-top:10px;color:#C9B8D8;font-size:14px}

.custom-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.custom-desc{margin:16px 0 22px;font-size:15.5px;color:var(--text)}
.custom-tags{list-style:none;display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.custom-tags li{background:var(--primary-soft);color:var(--primary-deep);font-size:13.5px;font-weight:600;padding:7px 14px;border-radius:999px}
.custom-fig img{width:100%;border-radius:24px;box-shadow:var(--shadow)}

.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{padding:26px 24px}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{width:46px;height:46px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:800;flex-shrink:0}
.review-meta{display:flex;flex-direction:column;line-height:1.3}
.review-meta strong{color:var(--deep);font-size:15.5px}
.stars{color:#FFB800;font-size:13px;letter-spacing:2px}
.review p{font-size:14px;color:var(--text)}

.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.privacy{padding:30px 26px;text-align:center}
.privacy-icon{width:46px;height:46px;color:var(--primary);margin:0 auto 16px}
.privacy h3{font-size:18px;color:var(--deep);margin-bottom:10px}
.privacy p{font-size:13.5px;color:var(--muted)}

.update-card{max-width:760px;margin:0 auto;padding:32px 34px}
.update-head{display:flex;align-items:center;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.ver-badge{background:var(--grad);color:#fff;font-size:18px;font-weight:800;padding:6px 18px;border-radius:999px}
.update-head time{color:var(--muted);font-size:14px}
.update-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.update-list li{position:relative;padding-left:22px;font-size:14.5px;color:var(--text)}
.update-list li::before{content:"";position:absolute;left:0;top:8px;width:9px;height:9px;border-radius:50%;background:var(--primary)}

.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{overflow:hidden}
.faq-item:hover{transform:none;box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;font-size:15.5px;font-weight:700;color:var(--deep);text-align:left}
.faq-icon{position:relative;width:22px;height:22px;flex-shrink:0;transition:transform .3s}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:var(--primary);border-radius:2px}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 24px 22px;font-size:14px;color:var(--muted)}

.download{background:linear-gradient(135deg,var(--deep) 0%,#452A63 60%,#5A2E5F 100%);padding:90px 0;text-align:center}
.download h1{color:#fff;font-size:52px;font-weight:900}
.download h1 .ver{color:var(--primary);font-size:24px;margin-left:10px}
.dl-meta{margin:14px 0 34px;color:#C9B8D8;font-size:14px}
.dl-btns{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}
.dl-note{margin-top:26px;color:#E8D9F5;font-size:14px}

.footer{background:var(--deep);border-top:1px solid rgba(255,255,255,.08);padding:26px 0;text-align:center}
.footer p{color:#B9A7CC;font-size:13.5px}
.footer a{color:#fff;font-weight:700;text-decoration:none}
.footer a:hover{color:var(--primary)}

.back-top{position:fixed;right:26px;bottom:30px;width:48px;height:48px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 12px 28px rgba(240,61,116,.35);opacity:0;visibility:hidden;transform:translateY(16px);transition:opacity .3s,transform .3s,visibility .3s;z-index:90}
.back-top svg{width:24px;height:24px}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{box-shadow:var(--shadow-hover)}

@media (max-width:1100px){
  .persona-grid{grid-template-columns:repeat(3,1fr)}
  .features-grid,.privacy-grid,.stats-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:46px}
  .sec-title{font-size:30px}
}
@media (max-width:900px){
  .nav-links{display:none}
  .hero{padding:110px 0 60px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-text{text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .intro-grid,.custom-grid{grid-template-columns:1fr;gap:36px}
  .vs-grid{grid-template-columns:1fr}
  .vs-badge{margin:0 auto}
}
@media (max-width:768px){
  .wrap{padding:0 20px}
  .section{padding:64px 0}
  .scroll-hint{display:block}
  .dl-btns{flex-direction:column;align-items:stretch}
  .btn-lg{padding:15px 20px;font-size:16px}
  .dl-meta{font-size:12.5px;white-space:nowrap}
  .scene-list{grid-template-columns:1fr}
  .sec-title{font-size:26px}
  .hero h1{font-size:38px}
  .hero h1 .ver{font-size:20px}
  .chat-body{height:300px}
  .download h1{font-size:40px}
  .download h1 .ver{font-size:20px}
  .update-card{padding:26px 20px}
}
@media (max-width:640px){
  .features-grid,.reviews-grid,.privacy-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr;gap:18px}
  .stats-grid{grid-template-columns:1fr 1fr;gap:14px}
  .stat strong{font-size:34px}
  .persona-grid{gap:12px}
  .persona{padding:10px}
  .persona span{font-size:12.5px}
  .chat-body{height:280px}
  .chat-input{padding:10px 12px;gap:8px}
  .chat-input input{padding:0 12px}
  .send-btn{padding:0 14px}
  .hero .btn-lg{width:100%}
  .custom-text .btn{width:100%}
  .btn-nav{padding:8px 14px;font-size:12.5px}
  .logo{font-size:17px}
  .logo span{font-size:13px}
}