: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;
  --red:#E85C6B;
  --star:#FFB800;
  --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:70px}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit;cursor:pointer;border:none;background:none}
ul{list-style:none}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:84px 0}
.section h2{font-size:34px;font-weight:800;color:var(--deep);text-align:center;letter-spacing:.5px}
.sec-sub{max-width:640px;margin:12px auto 46px;font-size:16px;color:var(--muted);text-align:center;line-height:1.8}

.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:700;transition:transform .25s,box-shadow .25s}
.btn:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.btn-lg{font-size:17px;padding:15px 34px}
.btn-sm{font-size:13.5px;padding:8px 18px}

.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)}

.header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,249,251,.92);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:box-shadow .3s}
.header.scrolled{box-shadow:0 6px 24px rgba(42,26,61,.08)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:8px;font-size:24px;font-weight:800;color:var(--primary-deep)}
.logo svg{width:26px;height:26px}
.logo-text{color:var(--deep)}
.nav{display:flex;gap:26px}
.nav a{font-size:15px;font-weight:500;color:var(--text);padding:6px 0;position:relative}
.nav a:hover{color:var(--primary-deep)}
.nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;border-radius:2px;background:var(--primary);transition:width .25s}
.nav a:hover::after{width:100%}

.hero{background:linear-gradient(180deg,var(--bg-soft) 0%,var(--bg) 100%);padding:110px 0 90px}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.hero h1{font-size:44px;font-weight:800;color:var(--deep);letter-spacing:1px;line-height:1.35}
.free-tag{color:var(--primary-deep)}
.ver-tag{display:inline-block;font-style:normal;font-size:15px;font-weight:600;color:var(--primary-deep);border:1px solid var(--border);background:var(--card);border-radius:999px;padding:4px 12px;margin-left:10px;vertical-align:middle;white-space:nowrap}
.hero-desc{font-size:17px;line-height:2;color:var(--muted);margin:18px 0 28px;max-width:520px}
.hero-btn{min-height:52px}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.hero-chips span{font-size:13px;color:var(--primary-deep);background:var(--card);border:1px solid var(--border);border-radius:999px;padding:5px 14px}
.personas{margin-top:36px}
.personas h3{font-size:15px;font-weight:600;color:var(--text);margin-bottom:14px}
.persona-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.persona{text-align:center}
.p-ava{display:block;width:100%;aspect-ratio:1;border-radius:50%;overflow:hidden;border:2px solid var(--card);box-shadow:var(--shadow);background:var(--primary-soft)}
.p-ava img{width:100%;height:100%;object-fit:cover;object-position:center}
.persona figcaption{font-size:12px;color:var(--muted);margin-top:8px;white-space:nowrap}

.chat{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 18px;border-bottom:1px solid var(--border);background:var(--bg-soft)}
.chat-avatar{width:52px;height:52px;border-radius:50%;object-fit:cover;border:2px solid var(--card)}
.chat-head-info{display:flex;flex-direction:column;gap:2px}
.chat-name{font-size:16px;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);display:inline-block}
.chat-body{min-height:340px;padding:20px 18px;display:flex;flex-direction:column;gap:14px;background:var(--bg)}
.bubble{max-width:80%;padding:11px 15px;font-size:14px;line-height:1.7;border-radius:16px;animation:bubbleIn .35s ease}
.bubble.ai{align-self:flex-start;background:var(--primary-soft);color:var(--text);border-top-left-radius:5px}
.bubble.me{align-self:flex-end;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border-top-right-radius:5px}
@keyframes bubbleIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.chat-foot{display:flex;align-items:center;gap:10px;padding:14px 16px;border-top:1px solid var(--border);background:var(--card)}
.chat-input{flex:1;min-width:0;background:var(--bg-soft);border:1px solid var(--border);border-radius:999px;padding:11px 18px;font-size:13px;color:var(--muted);line-height:1.5}
.chat-send{width:44px;height:44px;flex:none;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;display:flex;align-items:center;justify-content:center;transition:transform .25s,box-shadow .25s,background .25s}
.chat-send svg{width:18px;height:18px}
.chat-send:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.chat-send.off{background:#E3D9EA;cursor:not-allowed;box-shadow:none;transform:none}

.steps{background:var(--bg-soft)}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step-card{position:relative;padding:36px 28px;text-align:center;overflow:hidden}
.step-num{position:absolute;top:18px;right:24px;font-size:32px;font-weight:800;color:var(--primary-soft)}
.step-icon{width:64px;height:64px;margin:0 auto 18px;border-radius:18px;background:linear-gradient(135deg,var(--primary-soft),var(--card));color:var(--primary-deep);display:flex;align-items:center;justify-content:center}
.step-icon svg{width:30px;height:30px}
.step-card h3{font-size:19px;font-weight:700;color:var(--deep);margin-bottom:10px}
.step-card p{font-size:14px;color:var(--muted);line-height:1.8}

.product-in{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.product-text h2{text-align:left}
.product-desc{font-size:15.5px;line-height:2;color:var(--text);margin:16px 0 26px}
.check-list{display:grid;gap:14px}
.check-list li{display:flex;align-items:center;gap:10px;font-size:15px;color:var(--text)}
.check-ic{width:22px;height:22px;flex:none;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;display:flex;align-items:center;justify-content:center}
.check-ic svg{width:12px;height:12px}
.product-visual{display:flex;justify-content:center}
.phone{width:290px;background:var(--card);border:8px solid var(--deep);border-radius:40px;overflow:hidden;box-shadow:var(--shadow-hover)}
.phone-head{background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;display:flex;align-items:center;justify-content:center;gap:8px;padding:14px;font-size:15px;font-weight:600}
.phone-head svg{width:18px;height:18px}
.phone-item{display:flex;align-items:center;gap:12px;padding:13px 16px;border-bottom:1px solid var(--border)}
.phone-item img{width:46px;height:46px;border-radius:50%;object-fit:cover}
.phone-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.p-name{font-size:14.5px;font-weight:600;color:var(--deep);display:flex;align-items:center;gap:6px}
.p-meta{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.p-tag{flex:none;font-size:12px;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;padding:5px 12px}
.phone-foot{text-align:center;font-size:12px;color:var(--muted);padding:12px}

.features{background:var(--bg-soft)}
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feat-card,.privacy-card{padding:32px 26px;text-align:center}
.feat-icon,.pri-icon{width:60px;height:60px;margin:0 auto 16px;border-radius:16px;background:linear-gradient(135deg,var(--primary-soft),var(--card));color:var(--primary-deep);display:flex;align-items:center;justify-content:center}
.feat-icon svg,.pri-icon svg{width:28px;height:28px}
.feat-card h3,.privacy-card h3{font-size:18px;font-weight:700;color:var(--deep);margin-bottom:10px}
.feat-card p,.privacy-card p{font-size:14px;color:var(--muted);line-height:1.8}

.table-scroll{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow)}
.cmp-table{width:100%;min-width:0;border-collapse:collapse;background:var(--card)}
.cmp-table th,.cmp-table td{padding:16px 18px;font-size:14px;text-align:left;vertical-align:middle}
.cmp-table thead th{background:var(--deep);color:#fff;font-size:15px;font-weight:700}
.cmp-table thead .col-good{background:linear-gradient(90deg,var(--primary),var(--primary-deep))}
.cmp-table tbody th{background:var(--bg-soft);color:var(--deep);font-weight:600;white-space:nowrap}
.cmp-table tbody td{border-top:1px solid var(--border);color:var(--muted)}
.cmp-table tbody .col-good{background:var(--primary-soft);color:var(--text);font-weight:600}
.ok::before{content:"✓";color:var(--green);font-weight:700;margin-right:6px}
.no::before{content:"✗";color:var(--red);margin-right:6px}
.table-hint{display:none;text-align:center;font-size:12px;color:var(--muted);margin-top:10px}

.data{background:linear-gradient(135deg,var(--deep) 0%,#3B2456 100%);color:#fff}
.data h2{color:#fff}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:46px}
.data-item{text-align:center;padding:32px 16px;border-radius:var(--radius);background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12)}
.data-num{display:block;font-size:40px;font-weight:800;background:linear-gradient(90deg,#FFB3C9,var(--primary));-webkit-background-clip:text;background-clip:text;color:transparent}
.data-label{display:block;margin-top:8px;font-size:14px;color:#E9DCF5}

.reviews{background:var(--bg-soft)}
.reviews-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.review-card{padding:24px}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.avatar-ch{width:46px;height:46px;flex:none;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:17px;font-weight:700;display:flex;align-items:center;justify-content:center}
.review-who{display:flex;flex-direction:column;gap:3px}
.review-name{font-size:15px;font-weight:700;color:var(--deep)}
.stars{color:var(--star);font-size:13px;letter-spacing:1.5px;line-height:1}
.review-text{font-size:14px;color:var(--text);line-height:1.8}

.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}

.version{background:var(--bg-soft)}
.version-card{max-width:860px;margin:0 auto;padding:36px 40px}
.version-head{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:24px}
.ver-badge{font-size:22px;font-weight:800;color:#fff;background:linear-gradient(90deg,var(--primary),var(--primary-deep));padding:8px 22px;border-radius:999px}
.ver-date{font-size:14px;color:var(--muted)}
.version-list{display:grid;gap:14px}
.version-list li{display:flex;align-items:flex-start;gap:12px;font-size:14.5px;color:var(--text);line-height:1.8}

.faq-list{max-width:860px;margin:0 auto;display:grid;gap:16px}
.faq-item{overflow:hidden}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:14px;padding:20px 24px;font-size:16px;font-weight:600;color:var(--deep);text-align:left;transition:color .25s}
.faq-q:hover{color:var(--primary-deep)}
.faq-icon{flex:none;width:30px;height:30px;border-radius:50%;background:var(--primary-soft);color:var(--primary-deep);display:flex;align-items:center;justify-content:center;transition:transform .3s}
.faq-icon svg{width:16px;height:16px}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 24px 22px;font-size:14.5px;color:var(--muted);line-height:1.9}
.faq-item.open .faq-icon{transform:rotate(45deg)}

.download-card{background:linear-gradient(135deg,var(--primary),var(--primary-deep));border-radius:26px;padding:56px 40px;text-align:center;color:#fff;box-shadow:var(--shadow-hover)}
.download-card h1{font-size:34px;font-weight:800;letter-spacing:1px}
.download-card h1 span{color:#FFE4EE}
.download-card h1 em{font-style:normal;font-size:19px;font-weight:600;border:1px solid rgba(255,255,255,.65);border-radius:999px;padding:3px 12px;margin-left:10px;vertical-align:middle;white-space:nowrap}
.dl-meta{margin-top:12px;font-size:14px;color:rgba(255,255,255,.88)}
.dl-btns{display:flex;justify-content:center;gap:18px;margin-top:28px}
.dl-btn{background:#fff;color:var(--primary-deep);font-size:16px;font-weight:700;padding:15px 30px;border-radius:999px;box-shadow:0 8px 20px rgba(0,0,0,.12);transition:transform .25s,box-shadow .25s}
.dl-btn:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(0,0,0,.2)}
.dl-tip{margin-top:20px;font-size:14px;color:#FFE9F0}

.footer{background:var(--deep);color:#B9A6CE;padding:26px 0;text-align:center;font-size:13.5px}
.footer-brand{color:#fff;font-weight:600;transition:color .25s}
.footer-brand:hover{color:var(--primary)}

.to-top{position:fixed;right:24px;bottom:24px;z-index:99;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-hover);opacity:0;pointer-events:none;transform:translateY(12px);transition:opacity .3s,transform .3s}
.to-top svg{width:20px;height:20px}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.to-top.show:hover{transform:translateY(-3px)}

@media (max-width:1100px){
  .hero h1{font-size:38px}
  .hero-in{gap:36px}
  .features-grid,.privacy-grid,.data-grid,.reviews-grid{grid-template-columns:repeat(2,1fr)}
  .section h2{font-size:30px}
}

@media (max-width:900px){
  .nav{display:none}
  .hero{padding:104px 0 64px}
  .hero-in{grid-template-columns:1fr;gap:44px}
  .hero-desc{max-width:100%}
  .product-in{grid-template-columns:1fr;gap:44px}
  .product-text h2{text-align:center}
  .product-desc{text-align:center}
  .check-list{max-width:480px;margin:0 auto}
}

@media (max-width:768px){
  .wrap{padding:0 20px}
  .section{padding:64px 0}
  .section h2{font-size:26px}
  .sec-sub{font-size:14.5px;margin-bottom:34px}
  .cmp-table{min-width:640px}
  .table-hint{display:block}
  .dl-btns{flex-direction:column;align-items:stretch;gap:14px;margin-top:24px}
  .dl-btn{width:100%;min-height:48px;display:flex;align-items:center;justify-content:center}
  .dl-meta{font-size:12.5px;white-space:nowrap}
  .steps-grid{grid-template-columns:1fr}
  .download-card{padding:44px 24px}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a p{padding:0 18px 20px;font-size:14px}
  .hero-btn{width:100%}
  .logo{min-height:44px}
  .btn-header{min-height:44px;display:inline-flex;align-items:center}
  .to-top{right:16px;bottom:16px}
}

@media (max-width:640px){
  .features-grid,.reviews-grid,.privacy-grid{grid-template-columns:1fr}
  .persona-grid{gap:10px}
  .hero h1{font-size:29px}
  .ver-tag{font-size:13px;padding:3px 10px;margin-left:6px}
  .chat-body{min-height:260px}
  .chat-avatar{width:48px;height:48px}
  .data-num{font-size:32px}
  .data-label{font-size:13px}
  .download-card h1{font-size:25px}
  .download-card h1 em{font-size:15px;margin-left:6px;padding:2px 10px}
  .hero{padding:96px 0 56px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .card,.btn,.chat-send,.dl-btn,.to-top,.faq-icon,.faq-a{transition:none}
  .bubble{animation:none}
}