: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);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
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:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
ul{list-style:none}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
section{padding:88px 0}

.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;text-decoration:none;border:none;cursor:pointer;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.btn:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.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)}

.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.94);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.nav.scrolled{box-shadow:0 6px 20px rgba(42,26,61,.08)}
.nav-inner{display:flex;align-items:center;height:64px}
.logo{display:flex;align-items:center;gap:8px;text-decoration:none;flex-shrink:0}
.logo svg{width:24px;height:24px;fill:var(--primary)}
.logo span{font-size:24px;font-weight:800;color:var(--deep);letter-spacing:.5px}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto;margin-right:14px}
.nav-links a{font-size:15px;font-weight:500;color:var(--text);text-decoration:none;transition:color .2s}
.nav-links a:hover{color:var(--primary-deep)}
.btn-nav{padding:7px 16px;font-size:14px}

.hero{background:linear-gradient(160deg,var(--bg) 0%,var(--bg-soft) 55%,#FFE7F1 100%);padding:148px 0 88px}
.hero-inner{display:grid;grid-template-columns:1.06fr .94fr;gap:48px;align-items:center}
.hero-text h1{font-size:clamp(30px,4.2vw,44px);color:var(--deep);line-height:1.25;letter-spacing:.5px}
.ver{display:inline-block;padding:4px 12px;border-radius:999px;background:var(--primary-soft);color:var(--primary-deep);font-size:15px;font-weight:700;vertical-align:middle;margin-left:6px}
.hero-desc{color:var(--muted);font-size:17px;line-height:1.8;margin:18px 0 30px}
.btn-hero{padding:15px 38px;font-size:17px}
.persona-title{font-size:18px;color:var(--deep);margin:44px 0 18px;font-weight:700}
.persona-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.persona-grid li{text-align:center}
.p-avatar{aspect-ratio:1;border-radius:50%;overflow:hidden;border:3px solid #fff;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.p-avatar:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.p-avatar img{width:100%;height:100%;object-fit:cover}
.persona-grid span{display:block;font-size:13px;color:var(--muted);margin-top:8px}

.chat-card{background:#fff;border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow-hover);overflow:hidden;max-width:440px;margin-left:auto;width:100%}
.chat-head{display:flex;align-items:center;gap:12px;padding:12px 16px;background:linear-gradient(90deg,var(--primary),var(--primary-deep))}
.chat-avatar{width:42px;height:42px;border-radius:50%;object-fit:cover;border:2px solid rgba(255,255,255,.65)}
.chat-meta{display:flex;flex-direction:column;gap:2px}
.chat-name{color:#fff;font-size:16px;font-weight:700}
.chat-status{display:flex;align-items:center;gap:6px;color:rgba(255,255,255,.92);font-size:12.5px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(46,197,126,.28)}
.chat-body{display:flex;flex-direction:column;gap:10px;min-height:330px;max-height:330px;overflow-y:auto;padding:16px;background:#F1EBF8}
.msg{max-width:78%;padding:10px 14px;border-radius:16px;font-size:14px;line-height:1.65;word-break:break-word}
.msg.ai{align-self:flex-start;background:#fff;border:1px solid var(--border);color:var(--text);border-bottom-left-radius:6px}
.msg.user{align-self:flex-end;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border-bottom-right-radius:6px;box-shadow:0 6px 16px rgba(240,61,116,.22)}
.chat-input{display:flex;gap:10px;padding:12px 14px;background:#fff;border-top:1px solid var(--border)}
.chat-input input{flex:1;border:1px solid var(--border);border-radius:999px;padding:10px 16px;background:#F8F4FA;color:var(--text);font-size:16px;outline:none;min-width:0}
.send-btn{width:40px;height:40px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));border:none;cursor:pointer;flex-shrink:0;display:flex;align-items:center;justify-content:center;transition:transform .2s,box-shadow .2s}
.send-btn:hover{transform:scale(1.08);box-shadow:0 8px 18px rgba(240,61,116,.3)}
.send-btn svg{width:18px;height:18px;fill:#fff}
.send-btn.disabled{background:#D9D3E0;cursor:not-allowed;box-shadow:none}
.send-btn.disabled:hover{transform:none;box-shadow:none}

.sec-title{font-size:clamp(26px,3vw,34px);color:var(--deep);text-align:center;margin-bottom:12px;letter-spacing:.5px}
.sec-sub{text-align:center;color:var(--muted);margin-bottom:44px;font-size:15.5px}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step-card{padding:30px 26px}
.step-num{display:flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:20px;font-weight:800;margin-bottom:18px}
.step-card h3{font-size:19px;color:var(--deep);margin-bottom:10px}
.step-card p{color:var(--muted);font-size:14.5px}

.intro{background:var(--bg-soft)}
.intro-inner{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.intro-media img,.persona-media img{width:100%;max-width:560px;border-radius:24px;box-shadow:var(--shadow-hover)}
.intro-text h2,.persona-text h2{font-size:clamp(24px,2.6vw,32px);color:var(--deep);margin-bottom:16px;line-height:1.35}
.intro-lead{color:var(--muted);font-size:15.5px;line-height:1.85;margin-bottom:22px}
.check-list li{display:flex;align-items:flex-start;gap:12px;padding:9px 0;font-size:15.5px;color:var(--text)}
.check{color:var(--green);font-weight:800;flex-shrink:0}

.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feature-card{padding:26px 24px}
.f-icon{display:flex;align-items:center;justify-content:center;width:54px;height:54px;border-radius:16px;background:var(--primary-soft);color:var(--primary-deep);margin-bottom:18px}
.f-icon svg{width:26px;height:26px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.feature-card h3{font-size:18px;color:var(--deep);margin-bottom:10px}
.pain{font-size:13.5px;color:var(--primary-deep);background:var(--primary-soft);border-radius:10px;padding:7px 11px;margin-bottom:12px;line-height:1.5}
.desc{color:var(--muted);font-size:14px;line-height:1.75}

.compare{background:var(--bg-soft)}
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--border);background:var(--card);box-shadow:var(--shadow)}
.compare-table{width:100%;table-layout:fixed;border-collapse:separate;border-spacing:0;min-width:0}
.compare-table th,.compare-table td{padding:15px 16px;text-align:left;font-size:14px;border-bottom:1px solid var(--border);vertical-align:middle}
.compare-table thead th{background:var(--bg-soft);color:var(--deep);font-weight:700}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table th:first-child,.compare-table td:first-child{font-weight:600;color:var(--deep);background:var(--bg)}
.compare-table .col-hot{background:var(--primary-soft);color:var(--primary-deep);font-weight:600}
.compare-table thead th.col-hot{color:var(--primary-deep)}
.compare-table tbody td.col-hot{color:var(--text)}
.slide-hint{display:none;text-align:center;color:var(--muted);font-size:12.5px;margin-top:12px}

.scene-list{max-width:760px;margin:0 auto 48px}
.scene-list li{display:flex;align-items:flex-start;gap:12px;padding:12px 0;font-size:16px;color:var(--text)}
.scene-list .check{font-size:15px}
.vs-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:960px;margin:0 auto}
.vs-card{padding:30px 28px}
.vs-card h3{font-size:20px;margin-bottom:12px}
.vs-card p{font-size:14.5px;line-height:1.85;color:var(--muted)}
.vs-bad{background:#FDF3F7}
.vs-bad h3{color:var(--muted)}
.vs-good{background:linear-gradient(180deg,#FFF0F6,#FFF8FB);border-color:var(--primary)}
.vs-good h3{color:var(--primary-deep)}

.stats{background:radial-gradient(circle at 18% 22%,rgba(255,92,138,.16),transparent 42%),var(--deep);padding:84px 0}
.stats .sec-title{color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{text-align:center}
.num{display:block;font-size:clamp(34px,4vw,46px);font-weight:800;color:#fff;background:linear-gradient(90deg,#FF9FBF,#FF5C8A);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1.2}
.label{color:rgba(255,255,255,.72);font-size:14.5px;margin-top:8px;display:block}

.persona{background:var(--bg-soft)}
.persona-inner{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.persona-text .btn-hero{margin-top:10px}

.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review-card{padding:24px 22px}
.r-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.r-avatar{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:17px;font-weight:700;flex-shrink:0}
.r-name{display:block;font-size:15px;font-weight:700;color:var(--deep)}
.r-stars{display:block;color:#FFB648;font-size:13.5px;letter-spacing:2px}
.review-card p{font-size:14px;color:var(--muted);line-height:1.8}

.privacy{background:var(--bg-soft)}
.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.privacy-card{padding:26px 24px}
.privacy-card h3{font-size:17px;color:var(--deep);margin-bottom:10px}
.privacy-card p{font-size:14px;color:var(--muted);line-height:1.75}

.update-card{padding:32px;max-width:820px;margin:0 auto}
.u-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.u-ver{padding:7px 18px;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;font-weight:800;font-size:17px}
.u-date{color:var(--muted);font-size:14px}
.u-list li{position:relative;padding:9px 0 9px 26px;font-size:14.5px;color:var(--text)}
.u-list li::before{content:"";position:absolute;left:6px;top:17px;width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep))}

.faq{background:var(--bg-soft)}
.faq-list{max-width:820px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);background:var(--card);margin-bottom:14px;overflow:hidden;transition:box-shadow .25s}
.faq-item:hover{box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 22px;background:transparent;border:none;font-size:16px;font-weight:600;color:var(--deep);text-align:left;cursor:pointer}
.faq-icon{display:flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;background:var(--primary-soft);color:var(--primary-deep);font-size:18px;flex-shrink:0;transition:transform .3s;line-height:1}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;padding:0 22px;transition:max-height .35s ease,padding .35s ease}
.faq-item.open .faq-a{max-height:260px;padding:0 22px 20px}
.faq-a p{font-size:14.5px;color:var(--text);line-height:1.8}

.download{background:linear-gradient(180deg,var(--bg),var(--bg-soft));text-align:center}
.dl-title{font-size:clamp(26px,3.4vw,36px);color:var(--deep);letter-spacing:.5px}
.dl-meta{color:var(--muted);font-size:13px;margin-top:12px;white-space:nowrap}
.dl-btns{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;margin:30px 0 20px}
.btn-dl{padding:15px 32px;font-size:16px}
.dl-tip{color:var(--muted);font-size:14px}

.footer{background:var(--deep);color:rgba(255,255,255,.72);text-align:center;padding:36px 0;font-size:14px}
.footer a{color:#FF9FBC;text-decoration:none}

.to-top{position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));border:none;color:#fff;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,transform .3s,visibility .3s;z-index:99}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}

@media (max-width:1100px){
  .persona-grid{grid-template-columns:repeat(3,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .privacy-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .nav-links{display:none}
  .btn-nav{margin-left:auto}
  .hero{padding:120px 0 72px}
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .chat-card{margin-left:0;max-width:100%}
  .intro-inner,.persona-inner{grid-template-columns:1fr;gap:36px}
  .intro-media img,.persona-media img{max-width:520px;margin:0 auto}
  .persona-media{order:-1}
  .vs-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
  .container{padding:0 20px}
  section{padding:64px 0}
  .logo{min-height:44px;align-items:center}
  .btn-nav{height:44px;padding:0 18px}
  .send-btn{width:44px;height:44px}
  .hero{padding:104px 0 56px}
  .compare-table{min-width:640px}
  .slide-hint{display:block}
  .btn-hero{width:100%;padding:15px 24px}
  .dl-btns{flex-direction:column;align-items:stretch}
  .dl-meta{font-size:12px}
  .to-top{right:20px;bottom:20px;width:48px;height:48px}
}
@media (max-width:640px){
  .features-grid{grid-template-columns:1fr}
  .reviews-grid{grid-template-columns:1fr}
  .privacy-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr}
  .chat-body{min-height:250px;max-height:250px}
  .hero-desc{font-size:15.5px}
}