: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:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}

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

/* ===== 导航 ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,249,251,.92);
  backdrop-filter:blur(10px);
  transition:box-shadow .3s;
}
.nav.scrolled{box-shadow:0 4px 20px rgba(240,61,116,.10)}
.nav-inner{
  max-width:1160px;margin:0 auto;padding:14px 24px;
  display:flex;align-items:center;justify-content:space-between;
}
.logo{
  font-size:22px;font-weight:800;color:var(--deep);
  letter-spacing:1px;cursor:pointer;
}
.logo::before{content:"❤ ";color:var(--primary)}
.nav-menu{display:flex;gap:26px}
.nav-link{
  font-size:15px;color:var(--text);
  padding:6px 2px;border-bottom:2px solid transparent;
  transition:color .25s,border-color .25s;
}
.nav-link:hover{color:var(--primary-deep);border-color:var(--primary)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));
  color:#fff;border:none;border-radius:999px;
  cursor:pointer;font-weight:600;
  transition:transform .25s,box-shadow .25s;
  box-shadow:var(--shadow);
  text-align:center;
}
.btn:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.btn-sm{padding:8px 22px;font-size:14px}
.btn-lg{padding:15px 42px;font-size:17px}
.nav-download{flex-shrink:0}

/* ===== 通用区块 ===== */
section{padding:88px 0}
.sec-title{
  font-size:34px;font-weight:800;color:var(--deep);
  text-align:center;line-height:1.4;
}
.sec-title.left{text-align:left}
.sec-sub{
  text-align:center;color:var(--muted);
  font-size:16px;margin-top:12px;margin-bottom:44px;
}

.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)}

/* ===== Hero ===== */
.hero{
  padding:150px 0 88px;
  background:
    radial-gradient(600px 300px at 85% 10%,var(--primary-soft),transparent 70%),
    radial-gradient(500px 260px at 10% 90%,var(--bg-soft),transparent 70%),
    var(--bg);
}
.hero-grid{
  display:grid;grid-template-columns:1.1fr .9fr;
  gap:56px;align-items:center;
}
.hero h1{
  font-size:46px;font-weight:900;color:var(--deep);
  line-height:1.3;
}
.hero .ver{
  font-size:20px;font-weight:700;color:var(--primary-deep);
  background:var(--primary-soft);
  border-radius:999px;padding:4px 14px;
  vertical-align:middle;margin-left:8px;
}
.hero-desc{
  margin:20px 0 28px;
  font-size:17px;color:var(--muted);
  max-width:520px;
}
.persona-row{
  display:grid;grid-template-columns:repeat(6,1fr);
  gap:14px;margin-bottom:34px;max-width:560px;
}
.persona-item{
  text-align:center;
  transition:transform .25s;
}
.persona-item:hover{transform:translateY(-6px)}
.persona-item img{
  width:100%;aspect-ratio:1;border-radius:50%;
  object-fit:cover;border:3px solid var(--card);
  box-shadow:var(--shadow);
}
.persona-item span{
  display:block;margin-top:8px;font-size:13px;
  color:var(--text);font-weight:600;
}
.hero-download{min-width:280px}

/* ===== 聊天窗口 ===== */
.hero-right{display:flex;justify-content:center}
.chat-card{
  width:100%;max-width:400px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:22px;
  box-shadow:0 18px 48px rgba(240,61,116,.16);
  overflow:hidden;
}
.chat-head{
  display:flex;align-items:center;gap:12px;
  padding:14px 16px;
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));
}
.chat-head img{
  width:44px;height:44px;border-radius:50%;
  object-fit:cover;border:2px solid #fff;
}
.chat-head-info{display:flex;flex-direction:column}
.chat-name{color:#fff;font-weight:700;font-size:16px}
.chat-status{color:rgba(255,255,255,.92);font-size:12px;margin-top:2px}
.chat-body{
  padding:18px 16px;min-height:300px;
  background:linear-gradient(180deg,var(--bg-soft),var(--bg));
  display:flex;flex-direction:column;gap:14px;
}
.msg{display:flex;align-items:flex-start;gap:8px}
.msg.ai{justify-content:flex-start}
.msg.me{justify-content:flex-end}
.msg-avatar img{
  width:30px;height:30px;border-radius:50%;object-fit:cover;
}
.msg-bubble{
  max-width:76%;padding:10px 14px;
  border-radius:16px;font-size:14px;line-height:1.6;
}
.msg.ai .msg-bubble{
  background:var(--card);border:1px solid var(--border);
  color:var(--text);border-top-left-radius:4px;
}
.msg.me .msg-bubble{
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));
  color:#fff;border-top-right-radius:4px;
}
.chat-input{
  display:flex;align-items:center;gap:10px;
  padding:12px 16px;border-top:1px solid var(--border);
  background:var(--card);
}
.chat-input input{
  flex:1;height:42px;padding:0 16px;
  border:1px solid var(--border);border-radius:999px;
  background:var(--bg-soft);
  font-size:16px;color:var(--muted);outline:none;
}
.chat-input button{
  height:42px;padding:0 22px;flex-shrink:0;
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));
  color:#fff;border:none;border-radius:999px;
  font-size:14px;font-weight:600;cursor:pointer;
  transition:opacity .3s,transform .2s;
}
.chat-input button:hover{transform:translateY(-2px)}
.chat-input button.disabled{
  opacity:.45;cursor:not-allowed;
  transform:none;
}
.chat-input input.done{color:var(--primary-deep);font-weight:600}

/* ===== 三步上手 ===== */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step-card{padding:36px 28px;text-align:center}
.step-num{
  width:54px;height:54px;margin:0 auto 18px;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary-deep);
  border-radius:16px;font-size:20px;font-weight:800;
}
.step-card h3{font-size:19px;color:var(--deep);margin-bottom:10px}
.step-card p{font-size:14px;color:var(--muted)}

/* ===== 产品介绍 ===== */
.intro{background:var(--bg-soft)}
.intro-grid{
  display:grid;grid-template-columns:.9fr 1.1fr;
  gap:56px;align-items:center;
}
.intro-img img{
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  width:100%;height:auto;
}
.intro-text p{
  font-size:16px;color:var(--muted);
  margin:18px 0 24px;
}
.check-list li{
  position:relative;padding:10px 0 10px 34px;
  font-size:15px;color:var(--text);font-weight:600;
}
.check-list li::before{
  content:"";position:absolute;left:0;top:14px;
  width:20px;height:20px;border-radius:50%;
  background:var(--primary-soft);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23F03D74' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size:12px;background-position:center;background-repeat:no-repeat;
}

/* ===== 四大功能 ===== */
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{padding:30px 24px}
.feature-icon{
  width:52px;height:52px;margin-bottom:16px;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary-deep);
  border-radius:14px;
}
.feature-icon svg{width:26px;height:26px}
.feature-card h3{font-size:18px;color:var(--deep);margin-bottom:8px}
.feature-card .pain{
  font-size:12.5px;color:var(--primary-deep);
  background:var(--primary-soft);
  border-radius:8px;padding:4px 10px;
  display:inline-block;margin-bottom:10px;
}
.feature-card p{font-size:14px;color:var(--muted)}

/* ===== 优势对比 ===== */
.compare{background:var(--bg-soft)}
.compare-wrap{
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.compare-table{
  width:100%;min-width:640px;border-collapse:collapse;
  background:var(--card);
}
.compare-table th,.compare-table td{
  padding:16px 18px;text-align:left;font-size:14px;
  border-bottom:1px solid var(--border);
  white-space:nowrap;
}
.compare-table thead th{
  background:var(--deep);color:#fff;
  font-weight:700;
}
.compare-table thead .col-self{background:var(--primary-deep)}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table tbody .col-self{
  background:var(--primary-soft);color:var(--primary-deep);font-weight:700;
}
.compare-table tbody tr:nth-child(even) td:not(.col-self){background:var(--bg)}
.slide-hint{
  display:none;text-align:center;
  color:var(--muted);font-size:12px;margin-top:12px;
}

/* ===== 使用场景 ===== */
.scene-list{
  display:grid;grid-template-columns:1fr 1fr;
  gap:14px 30px;max-width:960px;margin:0 auto 52px;
}
.scene-list li{
  position:relative;padding:12px 0 12px 46px;
  font-size:15.5px;color:var(--text);
  background:var(--card);border:1px solid var(--border);
  border-radius:14px;
  transition:transform .25s,box-shadow .25s;
}
.scene-list li:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.scene-list li::before{
  content:"✔";position:absolute;left:14px;top:10px;
  color:var(--green);font-size:17px;font-weight:800;
}
.vs-wrap{
  display:grid;grid-template-columns:1fr auto 1fr;
  gap:28px;align-items:stretch;max-width:960px;margin:0 auto;
}
.vs-card{padding:34px 30px}
.vs-card h3{
  font-size:20px;color:var(--deep);
  margin-bottom:16px;padding-bottom:12px;
  border-bottom:1px solid var(--border);
}
.vs-card li{
  padding:8px 0 8px 24px;position:relative;
  font-size:14.5px;color:var(--muted);
}
.vs-card li::before{
  content:"✕";position:absolute;left:0;color:#E0526E;font-weight:700;
}
.vs-win{background:linear-gradient(180deg,var(--primary-soft),var(--card))}
.vs-win li::before{content:"✔";color:var(--green)}
.vs-badge{
  align-self:center;
  width:64px;height:64px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));
  color:#fff;font-size:17px;font-weight:800;
  box-shadow:var(--shadow-hover);
}

/* ===== 数据 ===== */
.stats{
  background:var(--deep);
  background-image:radial-gradient(500px 200px at 20% 0%,rgba(240,61,116,.25),transparent 70%);
  padding:80px 0;
}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:30px;text-align:center;
}
.stat-num{
  font-size:46px;font-weight:900;color:#fff;
  display:block;line-height:1.2;
}
.stat-label{
  display:block;margin-top:10px;
  color:rgba(255,255,255,.85);font-size:15px;
}

/* ===== 人设定制 ===== */
.custom{background:var(--bg-soft)}
.custom-grid{
  display:grid;grid-template-columns:.9fr 1.1fr;
  gap:56px;align-items:center;
}
.custom-img img{
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  width:100%;height:auto;
}
.custom-text p{
  font-size:16px;color:var(--muted);
  margin:18px 0 30px;
}

/* ===== 用户评价 ===== */
.reviews-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.review-card{padding:26px 24px}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.review-ava{
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#fff;font-size:19px;font-weight:700;
  flex-shrink:0;
}
.review-meta{display:flex;flex-direction:column}
.review-name{font-size:15px;font-weight:700;color:var(--deep)}
.stars{color:#FFB800;font-size:14px;letter-spacing:2px;margin-top:2px}
.review-card p{font-size:14px;color:var(--muted)}

/* ===== 隐私安全 ===== */
.privacy{background:var(--bg-soft)}
.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.privacy-card{padding:28px 22px;text-align:center}
.privacy-icon{
  width:52px;height:52px;margin:0 auto 14px;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary-deep);
  border-radius:50%;
}
.privacy-icon svg{width:26px;height:26px}
.privacy-card h3{font-size:17px;color:var(--deep);margin-bottom:8px}
.privacy-card p{font-size:13.5px;color:var(--muted)}

/* ===== 版本更新 ===== */
.version-card{max-width:760px;margin:0 auto;padding:34px 34px}
.version-head{
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:10px;margin-bottom:20px;
}
.version-no{
  font-size:26px;font-weight:900;color:var(--primary-deep);
  background:var(--primary-soft);
  border-radius:12px;padding:4px 18px;
}
.version-date{font-size:14px;color:var(--muted)}
.version-list li{
  padding:12px 0 12px 32px;position:relative;
  border-top:1px dashed var(--border);
  font-size:15px;color:var(--text);
}
.version-list li::before{
  content:"◆";position:absolute;left:6px;color:var(--primary);
  font-size:13px;top:14px;
}

/* ===== FAQ ===== */
.faq{background:var(--bg-soft)}
.faq-list{max-width:760px;margin:0 auto}
.faq-item{margin-bottom:16px;overflow:hidden}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:20px 24px;background:var(--card);
  border:none;cursor:pointer;
  font-size:16px;font-weight:700;color:var(--deep);
  text-align:left;
}
.faq-icon{
  width:26px;height:26px;flex-shrink:0;position:relative;
  margin-left:14px;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--primary);
  border-radius:2px;transition:transform .3s;
}
.faq-icon::before{width:14px;height:2px;left:6px;top:12px}
.faq-icon::after{width:2px;height:14px;left:12px;top:6px}
.faq-item.open .faq-icon::after{transform:scaleY(0)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .35s ease;
  background:var(--card);
}
.faq-a p{
  padding:16px 24px 22px;font-size:14.5px;color:var(--muted);
  border-top:1px solid var(--border);
}

/* ===== 下载区域 ===== */
.download{
  background:linear-gradient(160deg,var(--deep),#3B2357);
  text-align:center;
}
.download-title{
  font-size:38px;font-weight:900;color:#fff;line-height:1.3;
}
.download-title .ver{
  font-size:18px;color:var(--primary-soft);
  border:1px solid var(--primary);
  border-radius:999px;padding:2px 12px;
  vertical-align:middle;margin-left:6px;
}
.download-meta{
  color:rgba(255,255,255,.8);font-size:14px;
  margin:16px 0 32px;
}
.download-btns{
  display:flex;justify-content:center;gap:20px;
  flex-wrap:wrap;
}
.btn-dl{min-width:240px;font-size:16px;padding:16px 30px}
.download-tip{
  color:var(--primary-soft);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,.75);font-size:13.5px}
.footer-link{color:#fff;font-weight:700;text-decoration:none}

/* ===== 返回顶部 ===== */
.to-top{
  position:fixed;right:26px;bottom:30px;z-index:99;
  width:48px;height:48px;border-radius:50%;
  border:none;cursor:pointer;
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));
  color:#fff;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;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top svg{width:22px;height:22px}

/* ===== 响应式 ===== */
@media (max-width:1100px){
  .persona-row{grid-template-columns:repeat(3,1fr);max-width:420px}
  .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)}
  .hero h1{font-size:38px}
}

@media (max-width:900px){
  .nav-menu{display:none}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero{padding:120px 0 72px}
  .hero-left{text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .persona-row{margin-left:auto;margin-right:auto}
  .hero-download{margin:0 auto}
  .intro-grid,.custom-grid{grid-template-columns:1fr;gap:36px}
  .steps-grid{grid-template-columns:1fr;max-width:520px;margin:0 auto}
  .scene-list{grid-template-columns:1fr}
  .vs-wrap{grid-template-columns:1fr}
  .vs-badge{margin:0 auto}
}

@media (max-width:768px){
  section{padding:64px 0}
  .container{padding:0 20px}
  .sec-title{font-size:27px}
  .slide-hint{display:block}
  .download-btns{flex-direction:column;align-items:stretch;max-width:340px;margin:0 auto}
  .btn-dl{width:100%}
  .download-meta{white-space:nowrap;font-size:12.5px}
  .chat-body{min-height:280px}
  .hero h1{font-size:32px}
}

@media (max-width:640px){
  .features-grid,.privacy-grid,.reviews-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr;gap:24px}
  .stat-num{font-size:36px}
  .chat-body{min-height:250px}
  .hero-download{width:100%;min-width:0}
  .btn-lg{width:100%;min-width:0}
  .nav-inner{padding:12px 20px}
  .logo{font-size:19px}
  .btn-sm{padding:7px 16px;font-size:13px}
  .hero{padding-top:100px}
  .download-title{font-size:30px}
  .version-card{padding:24px 20px}
}