/* ===== soulai 官网落地页样式 ===== */
:root{
  --primary:#FF5B8D;
  --primary-2:#FF8AB5;
  --primary-deep:#E84A7A;
  --primary-soft:#FFE9F1;
  --deep:#2E2433;
  --text:#4A3F4D;
  --muted:#80717F;
  --border:#FFE0EA;
  --bg:#FFF8FB;
  --bg-alt:#FFF0F6;
  --card:#FFFFFF;
  --gradient:linear-gradient(135deg,#FF5B8D,#FF8AB5);
  --shadow-sm:0 4px 16px rgba(255,91,141,.10);
  --shadow:0 12px 32px rgba(255,91,141,.16);
  --radius-lg:22px;
  --maxw:1200px;
  --nav-h:64px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.sec{padding:84px 0}
.sec-alt{background:var(--bg-alt)}
section[id]{scroll-margin-top:calc(var(--nav-h) + 10px)}
h1,h2,h3{color:var(--deep);line-height:1.4}
.sec-title{font-size:32px;font-weight:800;text-align:center;letter-spacing:1px}
.sec-title.left{text-align:left}
.sec-sub{text-align:center;color:var(--muted);margin-top:10px;font-size:15px}
.ver{background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent;font-size:.7em;vertical-align:middle}

/* ===== 顶部导航 ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  height:var(--nav-h);
}
.nav.scrolled{box-shadow:var(--shadow-sm)}
.nav-inner{height:var(--nav-h);display:flex;align-items:center;gap:24px}
.logo{
  font-size:26px;font-weight:800;letter-spacing:1px;
  background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent;
  white-space:nowrap;
}
.menu{display:flex;gap:2px;flex:1;justify-content:center;flex-wrap:nowrap}
.menu a{
  font-size:13px;color:var(--text);padding:6px 9px;border-radius:8px;
  white-space:nowrap;transition:color .2s,background .2s;
}
.menu a:hover{color:var(--primary-deep);background:var(--primary-soft)}
.nav-btn{
  background:var(--gradient);color:#fff;font-size:14px;font-weight:600;
  padding:9px 16px;border-radius:999px;white-space:nowrap;
  box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s;
}
.nav-btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}

/* ===== 按钮 ===== */
.btn-main{
  display:inline-block;background:var(--gradient);color:#fff;
  font-size:16px;font-weight:700;padding:14px 34px;border-radius:999px;
  box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;
}
.btn-main:hover{transform:translateY(-2px);box-shadow:0 16px 38px rgba(255,91,141,.24)}

/* ===== 首屏 Hero ===== */
.hero{background:linear-gradient(180deg,#FFF0F6 0%,#FFF8FB 100%);padding:calc(var(--nav-h) + 46px) 0 84px;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-text h1{font-size:42px;font-weight:800;letter-spacing:1px}
.hero-sub{color:var(--text);font-size:16px;margin:18px 0 24px;max-width:520px}
.hero-persona{margin-bottom:28px}
.p-label{font-size:14px;color:var(--muted);display:block;margin-bottom:12px}
.p-chips{display:flex;gap:12px;flex-wrap:wrap}
.p-chip{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  background:var(--card);border:1px solid var(--border);border-radius:14px;
  padding:10px 14px;min-width:76px;transition:transform .2s,box-shadow .2s;
}
.p-chip:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.p-chip img{width:52px;height:52px;border-radius:50%;object-fit:cover}
.p-chip b{font-size:12px;font-weight:600;color:var(--deep)}

/* ===== 聊天窗口 ===== */
.hero-chat{display:flex;justify-content:center}
.chat-card{
  width:100%;max-width:380px;background:var(--card);
  border:1px solid var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);overflow:hidden;
  animation:float 5s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 16px;border-bottom:1px solid var(--border)}
.chat-ava{width:44px;height:44px;border-radius:50%;object-fit:cover}
.chat-user b{display:block;font-size:15px;color:var(--deep)}
.chat-user span{font-size:12px;color:var(--muted)}
.chat-body{background:var(--bg);padding:16px;min-height:300px;display:flex;flex-direction:column;gap:10px}
.msg{max-width:80%;padding:9px 13px;font-size:13px;line-height:1.6;border-radius:14px;word-break:break-word}
.msg.ai{background:var(--card);border:1px solid var(--border);border-top-left-radius:4px;align-self:flex-start}
.msg.user{background:var(--gradient);color:#fff;border-top-right-radius:4px;align-self:flex-end}
.chat-foot{display:flex;align-items:center;gap:8px;padding:12px 14px;border-top:1px solid var(--border)}
.chat-foot input{
  flex:1;border:1px solid var(--border);background:var(--bg);border-radius:999px;
  padding:9px 14px;font-size:13px;color:var(--text);outline:none;min-width:0;
}
.cf-ico{font-size:18px;line-height:1}
.chat-foot button{
  background:var(--gradient);color:#fff;font-size:13px;font-weight:600;
  padding:9px 18px;border-radius:999px;transition:box-shadow .2s;
}
.chat-foot button:hover{box-shadow:var(--shadow-sm)}

/* ===== 三步上手 ===== */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}
.step-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:34px 28px;transition:transform .25s,box-shadow .25s;
}
.step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.step-num{
  width:46px;height:46px;border-radius:14px;background:var(--gradient);color:#fff;
  font-size:18px;font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:18px;
}
.step-card h3{font-size:19px;margin-bottom:10px}
.step-card p{font-size:14px;color:var(--muted)}

/* ===== 产品介绍 ===== */
.product{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.product-text p{font-size:15px;color:var(--text);margin:16px 0}
.product-text .btn-main{margin-top:10px}
.product-img img{
  border-radius:var(--radius-lg);box-shadow:var(--shadow);
  width:100%;height:auto;
}

/* ===== 四大核心功能 ===== */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:44px}
.feat-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:28px 22px;transition:transform .25s,box-shadow .25s;
}
.feat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.feat-ico{
  width:52px;height:52px;border-radius:16px;background:var(--primary-soft);
  display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px;
}
.feat-card h3{font-size:18px;margin-bottom:10px}
.feat-card p{font-size:13px;color:var(--muted)}

/* ===== 优势对比 ===== */
.cmp-wrap{margin-top:44px;overflow-x:auto}
.cmp-legend{display:none}
.cmp-table{width:100%;border-collapse:separate;border-spacing:0;min-width:640px;background:var(--card);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}
.cmp-table th,.cmp-table td{padding:14px 18px;font-size:14px;text-align:center;border-bottom:1px solid var(--border)}
.cmp-table thead th{background:var(--primary-soft);color:var(--deep);font-weight:700;font-size:15px}
.cmp-table tbody td:first-child{font-weight:600;color:var(--deep);background:var(--bg);text-align:left}
.cmp-table .hl{background:var(--primary-soft);color:var(--primary-deep);font-weight:700}
.cmp-table tbody tr:last-child td{border-bottom:none}

/* ===== 使用场景 ===== */
.scen-wrap{margin-top:40px;display:grid;gap:40px}
.scen-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.scen-item{
  background:var(--card);border:1px solid var(--border);border-radius:14px;
  padding:14px 18px;font-size:15px;color:var(--text);transition:transform .2s,box-shadow .2s;
}
.scen-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.scen-vs{display:flex;align-items:stretch;justify-content:center;gap:18px}
.vs-box{
  flex:1;max-width:340px;text-align:center;border-radius:var(--radius-lg);padding:26px 20px;
  font-size:18px;font-weight:700;
}
.vs-bad{background:var(--bg);border:1px solid var(--border);color:var(--muted)}
.vs-good{background:var(--gradient);color:#fff;box-shadow:var(--shadow)}
.vs-box span{display:block;font-size:13px;font-weight:400;margin-top:8px;opacity:.85;line-height:1.6}
.vs-arrow{display:flex;align-items:center;font-size:26px;color:var(--primary);font-weight:800}

/* ===== 数据模块 ===== */
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:44px}
.data-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:34px 20px;text-align:center;transition:transform .25s,box-shadow .25s;
}
.data-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.num{display:block;font-size:38px;font-weight:800;color:var(--primary-deep);line-height:1.2}
.num em{font-style:normal;font-size:20px}
.data-card span{font-size:14px;color:var(--muted)}

/* ===== 人设定制 ===== */
.persona-intro{max-width:760px;margin:22px auto 0;text-align:center;font-size:15px;color:var(--muted)}
.persona-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.persona-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:26px;text-align:center;transition:transform .25s,box-shadow .25s;
}
.persona-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.persona-card img{width:96px;height:96px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid var(--primary-soft)}
.persona-card h3{font-size:18px;margin-bottom:8px}
.persona-card p{font-size:13px;color:var(--muted)}
.persona-custom{border-style:dashed;background:linear-gradient(180deg,#FFF0F6,#FFF8FB)}

/* ===== 用户评价 ===== */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}
.review-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:24px;transition:transform .25s,box-shadow .25s;
}
.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.rv-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.rv-ava{
  width:44px;height:44px;border-radius:50%;background:var(--gradient);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex-shrink:0;
}
.rv-meta b{display:block;font-size:15px;color:var(--deep)}
.stars{color:#FFB400;font-size:13px;letter-spacing:2px}
.review-card p{font-size:14px;color:var(--text)}

/* ===== 隐私安全 ===== */
.privacy{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:center}
.privacy-img img{border-radius:var(--radius-lg);box-shadow:var(--shadow);width:100%;height:auto}
.privacy-list{margin:22px 0 12px}
.privacy-list li{
  position:relative;padding-left:20px;margin-bottom:12px;font-size:14px;color:var(--text);
}
.privacy-list li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;background:var(--gradient)}
.privacy-list b{color:var(--deep);margin-right:8px}
.privacy-note{font-size:14px;color:var(--primary-deep);font-weight:600}

/* ===== 版本更新 ===== */
.ver-card{
  max-width:760px;margin:40px auto 0;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-sm);
}
.ver-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding-bottom:18px;border-bottom:1px solid var(--border);margin-bottom:18px}
.ver-badge{background:var(--primary-soft);color:var(--primary-deep);font-size:13px;font-weight:700;padding:5px 12px;border-radius:999px}
.ver-no{font-size:24px;font-weight:800;color:var(--deep)}
.ver-date{font-size:13px;color:var(--muted);margin-left:auto}
.ver-log li{
  position:relative;padding-left:22px;margin-bottom:10px;font-size:14px;color:var(--text);
}
.ver-log li::before{content:"·";position:absolute;left:6px;color:var(--primary);font-weight:800;font-size:18px;top:-1px}

/* ===== FAQ ===== */
.faq{max-width:820px}
.faq-item{
  background:var(--card);border:1px solid var(--border);border-radius:14px;
  margin-top:14px;overflow:hidden;transition:box-shadow .2s;
}
.faq-item.open{box-shadow:var(--shadow-sm)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:16px 20px;font-size:15px;font-weight:600;color:var(--deep);text-align:left;
}
.faq-arrow{font-size:20px;font-weight:400;color:var(--primary);transition:transform .3s;flex-shrink:0}
.faq-item.open .faq-arrow{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 20px 18px;font-size:14px;color:var(--muted)}

/* ===== 下载区域 ===== */
.download-sec{text-align:center;background:linear-gradient(180deg,#FFF0F6,#FFE9F1)}
.dl-title{font-size:38px;font-weight:800;letter-spacing:1px}
.dl-meta{font-size:14px;color:var(--muted);margin:14px 0 28px}
.dl-btns{display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.btn-dl{
  display:inline-block;background:var(--gradient);color:#fff;font-size:17px;font-weight:700;
  padding:16px 40px;border-radius:999px;box-shadow:var(--shadow);
  transition:transform .2s,box-shadow .2s;
}
.btn-dl:hover{transform:translateY(-2px);box-shadow:0 16px 38px rgba(255,91,141,.26)}
.dl-tip{font-size:15px;color:var(--text);margin-top:22px}

/* ===== 页脚 ===== */
.footer{background:var(--deep);padding:34px 0;text-align:center}
.f-brand{color:rgba(255,255,255,.65);font-size:14px;margin-bottom:8px}
.f-copy{color:rgba(255,255,255,.5);font-size:13px}
.f-copy a{color:#fff}
.f-copy a:hover{color:var(--primary-2)}

/* ===== 返回顶部 ===== */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:90;
  width:44px;height:44px;border-radius:50%;background:var(--gradient);color:#fff;
  font-size:20px;box-shadow:var(--shadow);
  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:hover{transform:translateY(-3px)}

/* ===== 入场动画 ===== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.on{opacity:1;transform:none}

/* ===== 平板适配 ===== */
@media (max-width:1080px){
  .menu{display:none}
  .nav-inner{justify-content:space-between}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero-chat{order:-1}
  .product{grid-template-columns:1fr;gap:32px}
  .privacy{grid-template-columns:1fr;gap:32px}
  .persona-grid{grid-template-columns:repeat(2,1fr)}
}

/* ===== 手机适配 ===== */
@media (max-width:768px){
  .container{padding:0 20px}
  .sec{padding:56px 0}
  .sec-title{font-size:24px}
  .sec-sub{font-size:13px}
  .hero{padding:calc(var(--nav-h) + 30px) 0 56px}
  .hero-text h1{font-size:29px}
  .hero-sub{font-size:14px}
  .p-label{text-align:center}
  .p-chips{gap:8px;justify-content:center}
  .p-chip{min-width:66px;padding:8px 10px}
  .p-chip img{width:44px;height:44px}
  .btn-main{width:100%;text-align:center;padding:14px 20px}
  .chat-body{min-height:260px}
  .steps{grid-template-columns:1fr;gap:16px;margin-top:30px}
  .feat-grid{grid-template-columns:1fr;gap:16px;margin-top:30px}
  .cmp-wrap{margin-top:30px}
  .cmp-table{min-width:0;display:block}
  .cmp-table thead{display:none}
  .cmp-table tbody{display:block}
  .cmp-table tbody tr{display:block;background:var(--card);border:1px solid var(--border);border-radius:12px;margin-bottom:12px;padding:6px 12px;overflow:hidden}
  .cmp-table tbody td{display:block;border-bottom:1px solid var(--border);text-align:left;padding:9px 12px;background:var(--card)}
  .cmp-table tbody td:first-child{background:var(--bg);font-weight:700}
  .cmp-table tbody tr:last-child td{border-bottom:1px solid var(--border)}
  .cmp-table tbody tr:last-child td:last-child{border-bottom:none}
  .cmp-table tbody td.hl{background:var(--primary-soft);color:var(--primary-deep);font-weight:700}
  .cmp-legend{display:flex;justify-content:center;gap:20px;margin-bottom:14px;font-size:13px;color:var(--deep);font-weight:600}
  .lg-bad::before{content:"✗ ";color:#E05B5B;font-weight:800}
  .lg-good::before{content:"✓ ";color:#2FA36B;font-weight:800}
  .cmp-table tbody td:not(:first-child)::before{content:"✗";margin-right:6px;color:#E05B5B;font-weight:800}
  .cmp-table tbody td.hl::before{content:"✓";margin-right:6px;color:#2FA36B;font-weight:800}
  .scen-list{grid-template-columns:1fr;gap:10px}
  .scen-vs{flex-direction:column;align-items:center}
  .vs-box{width:100%;max-width:340px}
  .vs-arrow{justify-content:center;font-size:22px}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:14px;margin-top:30px}
  .data-card{padding:24px 14px}
  .num{font-size:30px}
  .persona-grid{grid-template-columns:1fr 1fr;gap:14px;margin-top:30px}
  .persona-card{padding:18px 12px}
  .persona-card img{width:72px;height:72px}
  .persona-card h3{font-size:15px}
  .persona-card p{font-size:12px}
  .review-grid{grid-template-columns:1fr;gap:16px;margin-top:30px}
  .ver-card{padding:24px 18px}
  .ver-date{margin-left:0;width:100%}
  .dl-title{font-size:28px}
  .dl-meta{font-size:12px;white-space:nowrap;margin:12px 0 22px}
  .dl-btns{flex-direction:column;align-items:stretch;gap:14px}
  .btn-dl{width:100%;text-align:center;padding:15px 20px;font-size:16px}
  .dl-tip{font-size:13px}
  .faq-q{font-size:14px;padding:14px 16px}
  .to-top{right:16px;bottom:16px;width:40px;height:40px}
}