/* ========== 基础变量 ========== */
:root{
  --primary:#FF5C8A;
  --primary-deep:#E8437A;
  --primary-light:#FFB3CE;
  --primary-soft:#FFE9F0;
  --deep:#2A1733;
  --deep-2:#3B2447;
  --border:#F3DFE9;
  --bg:#FFF9FB;
  --bg-soft:#FFF1F6;
  --card:#FFFFFF;
  --text:#33243B;
  --text-2:#6D5A6B;
  --muted:#9A8395;
  --star:#FFB648;
  --radius:16px;
  --shadow:0 6px 20px rgba(255,92,138,.10);
  --shadow-hover:0 14px 32px rgba(255,92,138,.18);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,"Segoe UI",Roboto,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.7;
  padding-top:72px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--primary-deep)}
h1,h2,h3{color:var(--deep);line-height:1.3}
p{margin:0}
button{font-family:inherit}
::selection{background:var(--primary-soft);color:var(--primary-deep)}
:focus-visible{outline:3px solid rgba(255,92,138,.45);outline-offset:2px}

/* ========== 通用 ========== */
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.narrow{max-width:760px}
.section{padding:88px 0}
.bg-soft{background:var(--bg-soft)}
.section h2{font-size:clamp(26px,3.2vw,36px);text-align:center;font-weight:800;margin:0 0 12px}
.sec-sub{text-align:center;color:var(--text-2);font-size:15px;margin:0 0 44px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;border:none;cursor:pointer;border-radius:999px;transition:transform .25s ease,box-shadow .25s ease}
.btn:hover{transform:translateY(-2px)}
.ver{display:inline-block;margin-left:10px;font-size:.5em;font-weight:700;color:var(--primary-deep);background:var(--primary-soft);padding:5px 14px;border-radius:999px;vertical-align:middle}
.icon-box{width:52px;height:52px;border-radius:16px;background:var(--primary-soft);color:var(--primary-deep);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.icon-box svg{width:24px;height:24px}
.check-list{list-style:none;padding:0;margin:22px 0 0}
.check-list li{position:relative;padding-left:28px;font-size:14.5px;color:var(--text);line-height:1.7;margin-bottom:12px}
.check-list li::before{content:"";position:absolute;left:0;top:3px;width:18px;height:18px;border-radius:50%;background:var(--primary-soft)}
.check-list li::after{content:"";position:absolute;left:4px;top:8px;width:10px;height:5px;border-left:2px solid var(--primary);border-bottom:2px solid var(--primary);transform:rotate(-45deg)}

/* ========== 导航栏 ========== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border);transition:box-shadow .3s ease}
.nav.scrolled{box-shadow:0 6px 24px rgba(42,23,51,.08)}
.nav-inner{max-width:1180px;margin:0 auto;height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 24px}
.logo{display:inline-flex;align-items:center;gap:6px;font-size:22px;font-weight:800;color:var(--primary-deep);text-decoration:none;flex:none}
.logo svg{width:22px;height:22px}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{font-size:14px;color:var(--text-2);text-decoration:none;padding:8px 10px;border-radius:10px;white-space:nowrap;transition:color .2s ease,background .2s ease}
.nav-links a:hover{color:var(--primary-deep);background:var(--bg-soft)}
.btn-nav{font-size:14px;font-weight:600;color:#fff;background:var(--primary);padding:9px 18px;box-shadow:0 6px 16px rgba(255,92,138,.30);flex:none}
.btn-nav:hover{box-shadow:var(--shadow-hover)}

/* ========== Hero ========== */
.hero{padding:88px 0 84px;background:linear-gradient(180deg,var(--bg-soft) 0%,var(--bg) 100%)}
.hero-inner{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding:0 24px}
.hero-text h1{font-size:clamp(30px,4.4vw,46px);font-weight:800;margin:0 0 18px}
.hero-desc{font-size:16px;color:var(--text-2);line-height:1.9;max-width:540px;margin:0 0 26px}
.hero-persona{margin-bottom:30px}
.persona-label{font-size:14px;font-weight:700;color:var(--deep);margin:0 0 14px}
.persona-label::after{content:" · 5款人设+1款定制";font-weight:400;color:var(--muted)}
.persona-chips{display:flex;flex-wrap:wrap;gap:14px}
.chip{display:flex;flex-direction:column;align-items:center;gap:6px;text-decoration:none;color:var(--text-2);font-size:12px;transition:color .2s ease}
.chip img{width:56px;height:56px;border-radius:50%;border:2px solid #fff;box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease}
.chip:hover{color:var(--primary-deep)}
.chip:hover img{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.btn-hero{font-size:16px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-deep));padding:14px 30px;box-shadow:0 10px 26px rgba(255,92,138,.32)}
.btn-hero:hover{box-shadow:0 14px 34px rgba(255,92,138,.42)}
.btn-hero svg{width:18px;height:18px}

/* 聊天窗口 */
.chat-card{background:#fff;border:1px solid var(--border);border-radius:22px;box-shadow:0 18px 50px rgba(255,92,138,.16);overflow:hidden;max-width:430px;width:100%;margin-left:auto}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--border);background:linear-gradient(180deg,var(--bg-soft),#fff)}
.chat-head img{width:44px;height:44px;border-radius:50%;border:2px solid #fff;box-shadow:var(--shadow)}
.chat-name{font-weight:700;font-size:15px;color:var(--deep);margin:0}
.chat-status{font-size:12px;color:var(--muted);margin:2px 0 0;display:flex;align-items:center;gap:5px}
.dot{width:8px;height:8px;border-radius:50%;background:#2EAD6B;display:inline-block;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(46,173,107,.4)}50%{box-shadow:0 0 0 5px rgba(46,173,107,0)}}
.chat-body{padding:16px 18px;display:flex;flex-direction:column;gap:12px;background:var(--bg-soft)}
.msg{max-width:80%;padding:10px 14px;border-radius:16px;font-size:14px;line-height:1.65}
.msg-ai{align-self:flex-start;background:#fff;border:1px solid var(--border);border-bottom-left-radius:6px}
.msg-me{align-self:flex-end;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;border-bottom-right-radius:6px}
.typing{display:flex;gap:4px;align-items:center;padding:12px 16px}
.typing i{width:6px;height:6px;border-radius:50%;background:var(--muted);animation:blink 1.2s infinite}
.typing i:nth-child(2){animation-delay:.2s}
.typing i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.25}40%{opacity:1}}
.chat-input{display:flex;align-items:center;gap:10px;padding:12px 16px;border-top:1px solid var(--border);background:#fff}
.ci-plus{width:30px;height:30px;border-radius:50%;background:var(--bg-soft);color:var(--primary-deep);display:flex;align-items:center;justify-content:center;font-size:18px;line-height:1;flex:none}
.ci-text{flex:1;font-size:13px;color:var(--muted);overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.ci-send{width:32px;height:32px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;flex:none}
.ci-send svg{width:15px;height:15px}

/* ========== 三步上手 ========== */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{padding:32px 26px;position:relative}
.step-num{position:absolute;top:22px;right:24px;font-size:15px;font-weight:800;color:var(--primary);opacity:.35}
.step h3{font-size:19px;margin:0 0 10px}
.step p{font-size:14.5px;color:var(--text-2);line-height:1.75}

/* ========== 产品介绍 ========== */
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.intro-grid h2{text-align:left;margin-bottom:14px}
.intro-text p{font-size:15.5px;color:var(--text-2);line-height:1.9}
.intro-media img{width:100%;border-radius:20px;border:1px solid var(--border);box-shadow:var(--shadow)}
.reverse .intro-text{order:2}
.reverse .intro-media{order:1}

/* ========== 核心功能 ========== */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feat{padding:26px 22px}
.feat h3{font-size:18px;margin:0 0 10px}
.pain{display:inline-block;font-size:12px;font-weight:600;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;padding:3px 10px;margin-bottom:10px}
.feat p{font-size:13.5px;color:var(--text-2);line-height:1.8}

/* ========== 优势对比 ========== */
.cmp{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.cmp-row{display:grid;grid-template-columns:1.05fr 1.2fr 1.2fr 1.2fr}
.cmp-row+.cmp-row{border-top:1px solid var(--border)}
.cmp-head{background:var(--deep)}
.cmp-head .cmp-cell{color:#fff;font-weight:600;border-color:rgba(255,255,255,.12)}
.cmp-head .cmp-cell.win{background:rgba(255,92,138,.28)}
.cmp-dim,.cmp-cell{padding:16px 18px;font-size:14px;line-height:1.6}
.cmp-dim{font-weight:700;color:var(--deep);background:var(--bg);display:flex;align-items:center}
.cmp-cell{border-left:1px solid var(--border);color:var(--text-2)}
.cmp-cell.win{background:var(--primary-soft);color:var(--primary-deep);font-weight:600}

/* ========== 使用场景 ========== */
.scenes-list{display:grid;grid-template-columns:1fr 1fr;gap:14px 28px;max-width:880px;margin:0 auto}
.scene-item{position:relative;padding:14px 18px 14px 48px;font-size:15px;color:var(--text);background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease}
.scene-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.scene-item.full{grid-column:1/-1}
.scene-item::before{content:"";position:absolute;left:14px;top:50%;transform:translateY(-50%);width:26px;height:26px;border-radius:50%;background:var(--primary-soft)}
.scene-item::after{content:"";position:absolute;left:21px;top:50%;transform:translateY(-50%) rotate(-45deg);width:11px;height:5px;border-left:2px solid var(--primary);border-bottom:2px solid var(--primary)}
.vs-box{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:36px auto 0;background:linear-gradient(90deg,#F1E4EC,var(--primary-soft));border:1px solid var(--border);border-radius:var(--radius);padding:24px 32px;max-width:880px}
.vs-side{display:flex;flex-direction:column;gap:4px}
.vs-old{color:var(--text-2);text-align:left}
.vs-new{color:var(--primary-deep);text-align:right}
.vs-side strong{font-size:17px}
.vs-side em{font-style:normal;font-size:13px;color:var(--muted)}
.vs-icon{display:flex}
.vs-icon svg{width:22px;height:22px}
.vs-tag{width:44px;height:44px;border-radius:50%;background:var(--deep);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;flex:none;letter-spacing:1px}

/* ========== 数据模块 ========== */
.data{background:linear-gradient(160deg,var(--deep) 0%,var(--deep-2) 100%)}
.data h2{color:#fff}
.data .sec-sub{color:rgba(255,255,255,.6)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.stat{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.10);border-radius:var(--radius);padding:32px 16px;transition:transform .25s ease,background .25s ease}
.stat:hover{transform:translateY(-4px);background:rgba(255,255,255,.10)}
.num{font-size:clamp(30px,3.6vw,44px);font-weight:800;color:#FF9EC0;margin:0 0 8px}
.label{font-size:14px;color:rgba(255,255,255,.72);margin:0}

/* ========== 人设定制 ========== */

/* ========== 用户评价 ========== */
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.rev{padding:24px}
.rev-head{display:flex;gap:14px;align-items:center;margin-bottom:14px}
.avatar{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#C86BF5);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex:none}
.rev-name{font-weight:700;font-size:15px;color:var(--deep);margin:0 0 2px}
.stars{color:var(--star);font-size:13px;letter-spacing:2px;margin:0}
.rev>p{font-size:14px;color:var(--text-2);line-height:1.8}

/* ========== 隐私安全 ========== */
.privacy{text-align:center}
.privacy-icon{width:72px;height:72px;border-radius:50%;background:var(--primary-soft);color:var(--primary-deep);display:flex;align-items:center;justify-content:center;margin:0 auto 20px;box-shadow:var(--shadow)}
.privacy-icon svg{width:34px;height:34px}
.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:36px;text-align:left}
.priv{padding:24px 20px}
.priv h3{font-size:16.5px;margin:0 0 8px}
.priv p{font-size:13.5px;color:var(--text-2)}

/* ========== 版本更新 ========== */
.update-card{padding:28px 30px}
.upd-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap;border-bottom:1px dashed var(--border);padding-bottom:18px;margin-bottom:18px}
.ver-badge{font-size:20px;font-weight:800;color:var(--primary-deep);background:var(--primary-soft);padding:6px 16px;border-radius:999px}
.upd-tag{font-size:12px;font-weight:600;color:#fff;background:var(--primary);padding:3px 10px;border-radius:999px}
.upd-head time{font-size:14px;color:var(--text-2);margin-left:auto}
.upd-list{list-style:none;margin:0;padding:0}
.upd-list li{position:relative;padding:8px 0 8px 28px;font-size:14.5px;color:var(--text);line-height:1.7}
.upd-list li::before{content:"";position:absolute;left:0;top:13px;width:18px;height:18px;border-radius:50%;background:var(--primary-soft)}
.upd-list li::after{content:"";position:absolute;left:4px;top:18px;width:10px;height:5px;border-left:2px solid var(--primary);border-bottom:2px solid var(--primary);transform:rotate(-45deg)}

/* ========== FAQ ========== */
.faq-item{background:#fff;border:1px solid var(--border);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:box-shadow .25s ease}
.faq-item.open{box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 22px;background:none;border:none;cursor:pointer;font-size:15.5px;font-weight:700;color:var(--deep);text-align:left}
.faq-q:hover{color:var(--primary-deep)}
.faq-icon{position:relative;width:20px;height:20px;flex:none;transition:transform .3s ease}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--primary);border-radius:2px}
.faq-icon::before{left:9px;top:2px;width:2px;height:16px}
.faq-icon::after{left:2px;top:9px;width:16px;height:2px}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{margin:0;padding:0 22px 20px;font-size:14.5px;color:var(--text-2);line-height:1.8}

/* ========== 下载区域 ========== */
.download{background:radial-gradient(1100px 460px at 50% -10%,rgba(255,92,138,.28),transparent 60%),linear-gradient(160deg,var(--deep) 0%,#3B1F45 100%);text-align:center;padding:92px 20px}
.download h1{color:#fff;font-size:clamp(30px,4.2vw,44px);font-weight:800;margin:0 0 6px}
.download .ver{background:rgba(255,255,255,.16);color:#FFC9DD}
.dl-meta{color:rgba(255,255,255,.78);font-size:14px;margin:12px 0 34px}
.dl-btns{display:flex;justify-content:center;gap:18px;flex-wrap:wrap}
.btn-store{background:#fff;color:var(--primary-deep);font-size:16px;font-weight:700;padding:15px 32px;box-shadow:0 12px 30px rgba(0,0,0,.25)}
.btn-store:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(0,0,0,.32)}
.btn-store svg{width:20px;height:20px}
.dl-tip{color:rgba(255,255,255,.85);font-size:14px;margin-top:26px}

/* ========== 页脚 ========== */
.footer{background:var(--deep);padding:26px 0;text-align:center}
.footer p{color:rgba(255,255,255,.6);font-size:13.5px}
.footer a{color:#fff;text-decoration:none;font-weight:600}
.footer a:hover{color:var(--primary-light)}

/* ========== 返回顶部 ========== */
.to-top{position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:50%;background:var(--primary);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(255,92,138,.4);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .3s ease,visibility .3s ease,transform .3s ease;z-index:99}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{transform:translateY(-3px)}
.to-top svg{width:20px;height:20px}

/* ========== 平板适配 ========== */
@media (max-width:1200px){
  .nav-links{display:none}
}
@media (max-width:1024px){
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .rev-grid{grid-template-columns:repeat(2,1fr)}
  .privacy-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .intro-grid{gap:36px}
}

/* ========== 手机适配 ========== */
@media (max-width:768px){
  html{scroll-padding-top:76px}
  body{padding-top:64px}
  .nav-inner{height:64px;padding:0 20px}
  .logo{min-height:44px}
  .btn-nav{min-height:44px;display:inline-flex;align-items:center;justify-content:center}
  .section{padding:64px 0}
  .container{padding:0 20px}
  .download .container{padding:0}
  .download{padding:64px 20px}
  .sec-sub{margin-bottom:34px}
  .hero{padding:48px 0 60px}
  .hero-inner{grid-template-columns:1fr;gap:36px;padding:0 20px}
  .hero-desc{font-size:15px}
  .btn-hero{width:100%;font-size:15px;padding:14px 20px}
  .persona-chips{display:grid;grid-template-columns:repeat(3,1fr);gap:12px 8px;justify-items:center}
  .chip span{font-size:13px}
  .chat-card{margin-left:0;max-width:100%}
  .steps-grid{grid-template-columns:1fr}
  .intro-grid{grid-template-columns:1fr}
  .feat-grid{grid-template-columns:1fr}
  .feat p{font-size:14px}
  .cmp{background:transparent;border:none;border-radius:0;box-shadow:none;overflow:visible}
  .cmp-head{display:none}
  .cmp-row{grid-template-columns:1fr 1fr;gap:10px;background:#fff;border:1px solid var(--border);border-radius:16px;padding:12px;margin-bottom:12px;box-shadow:var(--shadow)}
  .cmp-dim{grid-column:1/-1;background:var(--bg-soft);border-radius:10px;padding:10px 12px}
  .cmp-cell{border:1px solid var(--border);border-radius:10px;padding:10px 12px;font-size:13.5px}
  .cmp-cell:nth-child(4){grid-column:1/-1}
  .cmp-cell::before{content:attr(data-label);display:block;font-size:11px;font-weight:600;color:var(--muted);margin-bottom:4px}
  .cmp-cell.win{border-color:transparent;background:var(--primary-soft)}
  .cmp-cell.win::before{color:var(--primary-deep)}
  .scenes-list{grid-template-columns:1fr}
  .vs-box{flex-direction:column;text-align:center;padding:22px 18px;gap:14px}
  .vs-old,.vs-new{text-align:center}
  .rev-grid{grid-template-columns:1fr}
  .privacy-grid{grid-template-columns:1fr}
  .update-card{padding:22px 18px}
  .upd-head time{margin-left:0;width:100%}
  .faq-q{padding:16px 16px;font-size:15px}
  .faq-a p{padding:0 16px 18px}
  .dl-btns{flex-direction:column;align-items:stretch;gap:14px}
  .btn-store{width:100%;font-size:15px}
  .dl-meta{font-size:12px;white-space:nowrap}
  .to-top{right:16px;bottom:20px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .typing i{animation:none}
  .dot{animation:none}
}