: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;
  --star:#FFB93B;
  --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,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;background:var(--bg);color:var(--text);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
button{font-family:inherit;cursor:pointer}
ul{list-style:none}

.container{max-width:1160px;margin:0 auto;padding:0 24px}
section{padding:88px 0}

.sec-title{font-size:34px;font-weight:800;color:var(--deep);text-align:center;margin-bottom:46px;letter-spacing:.5px}
.ver{display:inline-block;margin-left:10px;padding:4px 14px;font-size:15px;font-weight:700;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;vertical-align:middle}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;font-weight:600;border:none;border-radius:999px;cursor:pointer;transition:transform .25s,box-shadow .25s}
.btn:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(240,61,116,.28)}
.btn-primary{padding:14px 36px;font-size:16px}
.btn-hero{padding:16px 42px;font-size:17px}

.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.96);border-bottom:1px solid transparent;transition:box-shadow .25s,border-color .25s}
.nav.scrolled{border-bottom-color:var(--border);box-shadow:0 6px 24px rgba(42,26,61,.06)}
.nav-inner{max-width:1160px;margin:0 auto;padding:0 24px;height:68px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:inline-flex;align-items:center;gap:6px;font-size:22px;font-weight:800;color:var(--deep);white-space:nowrap;min-height:44px}
.logo-icon{width:24px;height:24px;color:var(--primary)}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-link{font-size:15px;color:var(--text);font-weight:500;transition:color .2s}
.nav-link:hover{color:var(--primary-deep)}
.btn-nav{padding:9px 20px;font-size:14px;min-height:40px}

.hero{padding:150px 0 76px;background:linear-gradient(180deg,var(--primary-soft) 0%,var(--bg) 62%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-left h1{font-size:48px;font-weight:800;color:var(--deep);line-height:1.25}
.hero-intro{margin:20px 0 30px;font-size:17px;color:var(--text);max-width:520px}
.hero-note{margin-top:18px;font-size:14px;color:var(--muted)}

.chat-card{width:100%;max-width:430px;margin-left:auto;background:var(--card);border:1px solid var(--border);border-radius:22px;box-shadow:0 16px 44px rgba(240,61,116,.14);overflow:hidden}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 18px;background:var(--deep)}
.chat-avatar{width:44px;height:44px;border-radius:50%;border:2px solid rgba(255,255,255,.35)}
.chat-id{display:flex;flex-direction:column;line-height:1.4}
.chat-name{font-size:16px;font-weight:700;color:#fff}
.chat-status{font-size:12px;color:#E8D8F5;display:flex;align-items:center;gap:6px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(46,197,126,.25)}
.chat-body{min-height:318px;padding:18px;background:linear-gradient(180deg,#FFF0F6 0%,#FFE4EE 100%);display:flex;flex-direction:column;gap:14px;overflow-y:auto}
.msg{display:flex;align-items:flex-start;gap:10px;max-width:86%}
.msg-user{flex-direction:row-reverse;margin-left:auto}
.msg-avatar{width:30px;height:30px;border-radius:50%;flex-shrink:0}
.bubble{padding:11px 15px;border-radius:16px;font-size:14.5px;line-height:1.65;box-shadow:0 4px 14px rgba(240,61,116,.10)}
.msg-ai .bubble{background:var(--card);border:1px solid var(--border);border-top-left-radius:4px;color:var(--text)}
.msg-user .bubble{background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;border-top-right-radius:4px}
.chat-input{display:flex;align-items:center;gap:10px;padding:12px 14px;background:var(--card);border-top:1px solid var(--border)}
#chatText{flex:1;min-width:0;height:44px;padding:0 16px;border:1px solid var(--border);border-radius:999px;background:var(--bg);color:var(--text);font-size:16px;outline:none}
.send-btn{width:44px;height:44px;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;border:none;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;transition:transform .2s,box-shadow .2s}
.send-btn svg{width:20px;height:20px}
.send-btn:hover{transform:scale(1.06);box-shadow:0 8px 20px rgba(240,61,116,.35)}
.send-btn.disabled{background:#E3D4E8;cursor:default;box-shadow:none;transform:none}

.persona-row{margin-top:64px}
.persona-title{font-size:22px;font-weight:700;color:var(--deep);text-align:center;margin-bottom:26px}
.persona-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.persona-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:12px 12px 16px;text-align:center;transition:transform .25s,box-shadow .25s}
.persona-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.persona-avatar{width:100%;aspect-ratio:1;border-radius:14px;object-fit:cover}
.persona-name{display:block;margin-top:12px;font-size:14px;font-weight:700;color:var(--deep)}
.persona-tag{display:inline-block;margin-top:6px;padding:3px 12px;font-size:13px;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px}
.persona-card-custom{border-style:dashed;background:var(--bg-soft)}

.steps{background:var(--bg-soft)}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step-card{position:relative;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:36px 28px 30px;text-align:center;transition:transform .25s,box-shadow .25s}
.step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.step-num{position:absolute;top:22px;right:26px;font-size:34px;font-weight:800;color:var(--primary-soft)}
.step-icon{width:52px;height:52px;margin:0 auto 18px;color:var(--primary)}
.step-card h3{font-size:19px;color:var(--deep);margin-bottom:10px}
.step-card p{font-size:14.5px;color:var(--muted);max-width:260px;margin:0 auto}

.product-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.product-img img{width:100%;border-radius:24px;box-shadow:var(--shadow-hover)}
.product-text .sec-title{text-align:left;margin-bottom:18px}
.product-desc{font-size:16px;color:var(--text);margin-bottom:26px}
.check-list{display:flex;flex-direction:column;gap:14px}
.check-list li{display:flex;align-items:center;gap:10px;font-size:15.5px;font-weight:500;color:var(--deep)}
.check-list svg{width:22px;height:22px;color:var(--primary);flex-shrink:0}

.features{background:var(--bg-soft)}
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px 26px;transition:transform .25s,box-shadow .25s}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.feat-icon{width:46px;height:46px;padding:11px;margin-bottom:18px;color:var(--primary-deep);background:var(--primary-soft);border-radius:14px}
.feature-card h3{font-size:18px;color:var(--deep);margin-bottom:8px}
.feat-pain{font-size:13px;font-weight:600;color:var(--primary-deep);background:var(--bg-soft);border-radius:999px;padding:5px 12px;display:inline-block;margin-bottom:12px}
.feat-desc{font-size:14.5px;color:var(--muted)}

.compare-wrap{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow-x:auto}
.compare-table{width:100%;min-width:640px;border-collapse:collapse;text-align:center;font-size:14.5px}
.compare-table th,.compare-table td{padding:15px 16px;border-bottom:1px solid var(--border)}
.compare-table thead th{background:var(--deep);color:#fff;font-weight:700;font-size:15px}
.compare-table thead th:first-child{border-radius:var(--radius) 0 0 0}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table tbody td:first-child{font-weight:600;color:var(--deep);background:var(--bg);text-align:left}
.col-hot{background:var(--primary-soft);color:var(--primary-deep);font-weight:600}
.compare-hint{display:none}

.scenes{background:var(--bg-soft)}
.scene-list{column-count:2;column-gap:48px;max-width:920px;margin:0 auto 54px}
.scene-list li{break-inside:avoid;display:flex;align-items:center;gap:10px;padding:11px 0;font-size:15.5px;font-weight:500;color:var(--deep)}
.scene-list svg{width:22px;height:22px;color:var(--primary);flex-shrink:0}
.vs-wrap{display:grid;grid-template-columns:1fr 92px 1fr;gap:20px;align-items:stretch;max-width:980px;margin:0 auto}
.vs-card{border-radius:var(--radius);padding:30px 28px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.vs-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.vs-card h3{font-size:19px;margin-bottom:12px}
.vs-card p{font-size:14.5px;color:var(--muted)}
.vs-alone{background:var(--card);border:1px solid #E5E9F2}
.vs-alone h3{color:#7B8AA5}
.vs-with{background:linear-gradient(160deg,#FFF0F6 0%,#FFE4EE 100%);border:1px solid var(--border)}
.vs-with h3{color:var(--primary-deep)}
.vs-badge{display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-deep));border-radius:50%;width:72px;height:72px;margin:auto;box-shadow:0 12px 26px rgba(240,61,116,.3)}

.stats{background:var(--deep);padding:76px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-num{display:block;font-size:46px;font-weight:800;color:#fff;line-height:1.2;font-variant-numeric:tabular-nums}
.stat-label{margin-top:8px;font-size:15px;color:#D8C9E8}

.custom-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.custom-text .sec-title{text-align:left;margin-bottom:18px}
.custom-desc{font-size:16px;color:var(--text);margin-bottom:30px}
.custom-img img{width:100%;border-radius:24px;box-shadow:var(--shadow-hover)}

.reviews{background:var(--bg-soft)}
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px;transition:transform .25s,box-shadow .25s}
.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.review-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.review-avatar{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-deep))}
.review-meta{display:flex;flex-direction:column}
.review-name{font-size:15.5px;font-weight:700;color:var(--deep)}
.stars{font-size:14px;color:var(--star);letter-spacing:2px}
.review-card p{font-size:14.5px;color:var(--text)}

.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.privacy-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px 26px;transition:transform .25s,box-shadow .25s}
.privacy-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.priv-icon{width:46px;height:46px;padding:11px;margin-bottom:18px;color:var(--primary-deep);background:var(--primary-soft);border-radius:14px}
.privacy-card h3{font-size:17.5px;color:var(--deep);margin-bottom:10px}
.privacy-card p{font-size:14.5px;color:var(--muted)}

.update{background:var(--bg-soft)}
.update-card{max-width:760px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:34px 36px}
.update-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:22px;padding-bottom:20px;border-bottom:1px solid var(--border)}
.update-ver{font-size:20px;font-weight:800;color:#fff;background:linear-gradient(90deg,var(--primary),var(--primary-deep));padding:7px 20px;border-radius:999px}
.update-date{font-size:14px;color:var(--muted)}
.update-list li{position:relative;padding:9px 0 9px 26px;font-size:15px;color:var(--text)}
.update-list li::before{content:"";position:absolute;left:6px;top:17px;width:8px;height:8px;border-radius:50%;background:var(--primary)}

.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);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:19px 24px;background:none;border:none;text-align:left;font-size:16px;font-weight:600;color:var(--deep)}
.faq-arrow{width:20px;height:20px;color:var(--primary-deep);flex-shrink:0;transition:transform .3s}
.faq-item.open .faq-arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 24px 20px;font-size:14.5px;color:var(--muted)}

.download{background:linear-gradient(180deg,var(--bg) 0%,var(--primary-soft) 100%);text-align:center}
.download-title{font-size:38px;font-weight:800;color:var(--deep);margin-bottom:14px}
.download-meta{font-size:14.5px;color:var(--muted);margin-bottom:34px}
.download-btns{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
.btn-download{padding:15px 38px;font-size:16px;min-width:236px}
.download-tip{margin-top:26px;font-size:15px;color:var(--deep);font-weight:500}

.footer{background:var(--deep);padding:26px 0}
.footer-inner{display:flex;justify-content:center;align-items:center;font-size:13.5px;color:#C9BAD9}
.footer a{color:#fff;font-weight:600;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:0 8px;transition:color .2s}
.footer a:hover{color:var(--primary)}

.to-top{position:fixed;right:24px;bottom:24px;width:48px;height:48px;display:flex;align-items:center;justify-content:center;border:none;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;box-shadow:0 12px 28px rgba(240,61,116,.35);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,transform .3s,visibility .3s;z-index:99}
.to-top svg{width:22px;height:22px}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}

@media (max-width:1100px){
  section{padding:72px 0}
  .hero{padding-top:132px}
  .sec-title{font-size:29px;margin-bottom:38px}
  .hero-left h1{font-size:38px}
  .persona-grid{grid-template-columns:repeat(3,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .privacy-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:900px){
  .nav-links{display:none}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .chat-card{margin:0 auto}
  .hero-left{text-align:center}
  .hero-intro{margin-left:auto;margin-right:auto}
  .product-grid{grid-template-columns:1fr;gap:36px}
  .product-text .sec-title,.custom-text .sec-title{text-align:center}
  .custom-grid{grid-template-columns:1fr;gap:36px}
  .custom-text{text-align:center}
  .check-list{align-items:center}
  .vs-wrap{grid-template-columns:1fr}
  .vs-badge{width:60px;height:60px;font-size:17px}
}

@media (max-width:768px){
  section{padding:58px 0}
  .container{padding:0 20px}
  .hero{padding:118px 0 56px}
  .hero-left h1{font-size:31px}
  .ver{margin-left:6px;padding:3px 11px;font-size:13px}
  .btn-hero{width:100%;padding:15px 24px}
  .sec-title{font-size:25px;margin-bottom:32px}
  .step-card{padding:28px 20px 24px}
  .compare-wrap{-webkit-overflow-scrolling:touch}
  .compare-hint{display:block;text-align:center;font-size:12.5px;color:var(--muted);margin-top:12px}
  .scene-list{column-count:1;max-width:560px;margin-bottom:44px}
  .vs-card{padding:24px 20px}
  .update-card{padding:26px 22px}
  .download-title{font-size:29px}
  .download-meta{font-size:12.5px}
  .download-btns{flex-direction:column;gap:14px}
  .btn-download{width:100%;min-width:0;padding:14px 20px}
  .btn-nav{min-height:44px}
  .to-top{right:20px;bottom:20px;width:46px;height:46px}
}

@media (max-width:640px){
  .steps-grid{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .reviews-grid{grid-template-columns:1fr}
  .privacy-grid{grid-template-columns:1fr}
  .chat-body{min-height:232px}
  .stats-grid{gap:26px 14px}
  .stat-num{font-size:34px}
}