: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:70px}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",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}
ul{list-style:none}
button{font-family:inherit}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.narrow{max-width:820px}

.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;letter-spacing:.5px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.btn:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.btn-sm{font-size:13.5px;padding:6px 16px}
.btn-md{font-size:15px;padding:13px 28px}
.btn-lg{font-size:17px;padding:15px 36px}

.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(255,249,251,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:box-shadow .25s,border-color .25s}
.nav.scrolled{border-color:var(--border);box-shadow:0 6px 20px rgba(240,61,116,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:24px;font-weight:800;color:var(--primary-deep);letter-spacing:1px;line-height:1.2}
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-menu a{font-size:15px;color:var(--text);padding:8px 14px;border-radius:10px;transition:color .2s,background .2s}
.nav-menu a:hover{color:var(--primary-deep);background:var(--primary-soft)}

.hero{background:linear-gradient(180deg,var(--bg-soft) 0%,var(--bg) 78%);padding:128px 0 72px}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.hero h1{font-size:46px;font-weight:800;color:var(--deep);line-height:1.25;margin-bottom:16px}
.v-badge{display:inline-block;vertical-align:middle;margin-left:10px;font-size:15px;font-weight:700;color:var(--primary-deep);background:var(--primary-soft);border:1px solid var(--border);padding:5px 14px;border-radius:999px}
.hero-sub{font-size:20px;font-weight:600;color:var(--deep);margin-bottom:12px}
.hero-desc{color:var(--muted);font-size:15.5px;max-width:520px;margin-bottom:26px}
.hero-tip{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:18px}
.tip{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--primary-deep);background:var(--card);border:1px solid var(--border);padding:7px 14px;border-radius:999px;box-shadow:var(--shadow)}
.tip svg{flex-shrink:0;color:var(--primary)}

.persona{margin-top:44px}
.persona h2{font-size:18px;font-weight:700;color:var(--deep);margin-bottom:16px}
.persona-list{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.persona-item{display:flex;flex-direction:column;align-items:center;gap:8px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:14px 8px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.persona-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.persona-item img{width:96px;height:96px;border-radius:50%;border:3px solid var(--primary-soft);object-fit:cover}
.persona-item span{font-size:13px;font-weight:600;color:var(--text);white-space:nowrap}

.chat-card{width:100%;max-width:420px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow-hover);overflow:hidden}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 18px;background:linear-gradient(120deg,var(--primary),var(--primary-deep))}
.chat-avatar{width:46px;height:46px;border-radius:50%;border:2px solid rgba(255,255,255,.85);object-fit:cover;flex-shrink:0}
.chat-id{display:flex;flex-direction:column;line-height:1.35}
.chat-name{font-size:16px;font-weight:700;color:#fff}
.chat-status{font-size:12.5px;color:rgba(255,255,255,.92);display:flex;align-items:center;gap:5px}
.dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(46,197,126,.25)}
.chat-body{height:310px;overflow-y:auto;padding:18px 16px;background:#FDF6F9;display:flex;flex-direction:column;gap:12px}
.msg{display:flex}
.msg.user{justify-content:flex-end}
.bubble{max-width:80%;padding:10px 14px;font-size:14px;line-height:1.65;border-radius:16px}
.msg.ai .bubble{background:var(--card);color:var(--text);border:1px solid var(--border);border-top-left-radius:4px}
.msg.user .bubble{background:linear-gradient(120deg,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)}
.chat-input input{flex:1;min-width:0;border:none;outline:none;background:var(--bg-soft);border-radius:999px;padding:12px 16px;font-size:16px;color:var(--muted)}
.send-btn{width:44px;height:44px;flex-shrink:0;border:none;border-radius:50%;background:linear-gradient(120deg,var(--primary),var(--primary-deep));color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s}
.send-btn:hover{transform:scale(1.06);box-shadow:var(--shadow-hover)}
.send-btn:disabled{background:#E7D9E2;cursor:not-allowed;transform:none;box-shadow:none}

.section{padding:84px 0}
.alt{background:var(--bg-soft)}
.sec-title{font-size:34px;font-weight:800;color:var(--deep);text-align:center;margin-bottom:10px;line-height:1.35}
.sec-title.left{text-align:left}
.sec-sub{text-align:center;color:var(--muted);font-size:15.5px;margin-bottom:46px}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step-card{padding:30px 26px}
.step-num{display:block;font-size:44px;font-weight:800;color:var(--primary);line-height:1;margin-bottom:16px;opacity:.85}
.step-card h3{font-size:18px;font-weight:700;color:var(--deep);margin-bottom:8px}
.step-card p,.f-card p,.p-card p,.r-card p,.faq-a p{color:var(--muted);font-size:14.5px}

.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.split-img img{width:100%;border-radius:24px;border:1px solid var(--border);box-shadow:var(--shadow)}
.split-text p{color:var(--muted);font-size:15.5px;margin-bottom:20px}
.check-list li,.scene-list li{display:flex;align-items:flex-start;gap:12px;padding:9px 0;font-size:15.5px;color:var(--text)}
.check{width:22px;height:22px;flex-shrink:0;border-radius:50%;background:var(--primary-soft);color:var(--primary-deep);font-size:12px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;margin-top:3px}

.f-card{padding:26px 24px}
.f-icon,.p-icon{width:54px;height:54px;border-radius:16px;background:var(--primary-soft);color:var(--primary-deep);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.f-card h3,.p-card h3{font-size:18px;font-weight:700;color:var(--deep);margin-bottom:10px}
.pain{display:inline-block;font-size:13px;color:var(--primary-deep);background:var(--primary-soft);border-radius:8px;padding:5px 10px;margin-bottom:10px;font-weight:600}

.table-scroll{overflow-x:auto;border-radius:var(--radius)}
.cmp-table{width:100%;min-width:640px;border-collapse:separate;border-spacing:0;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.cmp-table th,.cmp-table td{padding:14px 16px;font-size:14.5px;text-align:center;border-bottom:1px solid var(--border)}
.cmp-table thead th{background:#FBF1F6;color:var(--deep);font-weight:700;font-size:15px}
.cmp-table tbody tr:last-child td{border-bottom:none}
.cmp-table tbody td:first-child{color:var(--deep);font-weight:600;text-align:left}
.cmp-table .hl{background:var(--primary-soft);color:var(--primary-deep);font-weight:700}
.cmp-table thead .hl{background:linear-gradient(120deg,var(--primary),var(--primary-deep));color:#fff}
.scroll-tip{display:none;text-align:center;font-size:12.5px;color:var(--muted);margin-top:12px}

.scene-list{display:grid;grid-template-columns:1fr 1fr;gap:6px 40px;max-width:860px;margin:0 auto 20px}
.vs-wrap{display:grid;grid-template-columns:1fr auto 1fr;gap:22px;align-items:center;max-width:900px;margin:40px auto 0}
.vs-card{padding:28px 26px}
.vs-card h3{font-size:19px;font-weight:800;color:var(--deep);margin-bottom:14px}
.vs-card li{padding:8px 0;font-size:15px;color:var(--muted)}
.vs-card li::before{content:"×";color:#D98AA5;font-weight:800;margin-right:10px}
.vs-card.good{border-color:var(--primary);background:var(--primary-soft)}
.vs-card.good h3{color:var(--primary-deep)}
.vs-card.good li::before{content:"✔";color:var(--primary-deep);font-weight:800;margin-right:10px}
.vs-badge{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:16px;font-weight:800;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-hover)}

.stats{background:var(--deep);padding:70px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{text-align:center}
.stat-num{font-size:46px;font-weight:800;color:#FFB3C9;line-height:1.2;display:inline-block}
.stat-suffix{font-size:20px;font-weight:700;color:#FF8FB0;margin-left:3px}
.stat-label{font-size:14.5px;color:rgba(255,255,255,.68);margin-top:8px}

.r-card{padding:22px}
.r-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.r-avatar{width:44px;height:44px;border-radius:50%;background:var(--primary-soft);color:var(--primary-deep);font-size:17px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.r-info{display:flex;flex-direction:column;line-height:1.4}
.r-name{font-size:15px;font-weight:700;color:var(--deep)}
.r-stars{font-size:13px;color:#FFB300;letter-spacing:2px}
.p-card{padding:26px 24px}

.changelog-card{padding:30px}
.cl-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;border-bottom:1px solid var(--border);padding-bottom:16px;margin-bottom:8px}
.cl-version{padding:6px 16px;border-radius:999px;background:linear-gradient(120deg,var(--primary),var(--primary-deep));color:#fff;font-size:15px;font-weight:700}
.cl-date{font-size:14px;color:var(--muted)}
.cl-list li{position:relative;padding:11px 0 11px 26px;font-size:15px;color:var(--text);border-bottom:1px dashed var(--border)}
.cl-list li:last-child{border-bottom:none}
.cl-list li::before{content:"";position:absolute;left:4px;top:20px;width:8px;height:8px;border-radius:50%;background:var(--primary)}

.faq-list{max-width:780px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:14px;overflow:hidden;transition:box-shadow .25s}
.faq-item:hover{box-shadow:var(--shadow-hover)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 20px;background:none;border:none;font-size:16px;font-weight:600;color:var(--deep);cursor:pointer;text-align:left}
.faq-icon{width:22px;height:22px;flex-shrink:0;position:relative}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform .3s}
.faq-icon::before{left:4px;right:4px;top:10px;height:2px}
.faq-icon::after{top:4px;bottom:4px;left:10px;width:2px}
.faq-item.open .faq-icon::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;padding:0 20px}
.faq-item.open .faq-a{max-height:240px;padding-bottom:18px}

.download{background:linear-gradient(180deg,var(--bg-soft),var(--bg));padding:76px 0}
.download-inner{text-align:center}
.dl-title{font-size:40px;font-weight:800;color:var(--deep)}
.dl-meta{font-size:13px;color:var(--muted);margin:14px 0 28px}
.dl-btns{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.dl-tip{font-size:15px;color:var(--primary-deep);font-weight:600;margin-top:20px}

.footer{background:var(--deep);padding:30px 0;text-align:center}
.footer p{font-size:14px;color:rgba(255,255,255,.72)}
.footer a{color:#fff;font-weight:700}
.footer a:hover{color:var(--primary)}

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

a:focus-visible,button:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

@media (max-width:1100px){
  .persona-list{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:38px}
  .sec-title{font-size:30px}
  .hero-grid{gap:40px}
}
@media (max-width:900px){
  .nav-menu{display:none}
  .hero{padding:104px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-desc{max-width:100%}
  .chat-card{max-width:440px}
  .grid-3{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:36px}
  .vs-wrap{grid-template-columns:1fr}
  .vs-badge{justify-self:center}
  .scene-list{grid-template-columns:1fr}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:60px 0}
  .sec-title{font-size:27px}
  .sec-sub{margin-bottom:34px}
  .hero-text{display:flex;flex-direction:column;align-items:center;text-align:center}
  .hero-text .btn-lg{width:100%}
  .split-text .btn-md{width:100%}
  .table-scroll{-webkit-overflow-scrolling:touch}
  .scroll-tip{display:block}
  .dl-btns{flex-direction:column}
  .dl-btns .btn{width:100%}
  .dl-meta{white-space:nowrap;font-size:12px}
  .dl-title{font-size:32px}
  .hero h1{font-size:32px}
}
@media (max-width:640px){
  .grid-4{grid-template-columns:1fr}
  .chat-body{height:240px}
  .stat-num{font-size:34px}
  .stat-suffix{font-size:17px}
  .hero-sub{font-size:18px}
  .btn-lg{font-size:16px;padding:14px 28px}
  .persona-item img{width:76px;height:76px}
  .persona-list{gap:10px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .card,.btn,.persona-item,.send-btn,.back-top{transition:none}
}