/* ===== bubbly AI 官网落地页 style.css ===== */
: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);
  --nav-h:66px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  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:1120px;margin:0 auto;padding:0 24px}
section{padding:88px 0}

/* ===== 通用组件 ===== */
.sec-head{text-align:center;max-width:680px;margin:0 auto 48px}
.sec-title{font-size:32px;font-weight:800;color:var(--deep);letter-spacing:.5px}
.sec-title em{font-style:normal;color:var(--primary-deep)}
.sec-sub{color:var(--muted);margin-top:12px;font-size:15px}
.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)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));
  color:#fff;border-radius:999px;border:0;cursor:pointer;font-weight:700;
  transition:transform .25s,box-shadow .25s;
}
.btn:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.badge{
  display:inline-flex;align-items:center;padding:5px 14px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary-deep);font-size:13px;font-weight:700;
}

/* ===== 导航栏 ===== */
#nav{
  position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);
  background:rgba(255,249,251,.94);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s,border-color .25s;
}
#nav.scrolled{box-shadow:0 6px 24px rgba(240,61,116,.10);border-color:var(--border)}
.nav-in{
  max-width:1120px;margin:0 auto;padding:0 24px;height:var(--nav-h);
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.logo{display:flex;align-items:center;gap:8px;font-size:25px;font-weight:800;color:var(--primary-deep);letter-spacing:.5px;line-height:1}
.logo svg{width:26px;height:26px}
.nav-menu{display:flex;align-items:center;gap:30px}
.nav-menu a{font-size:15px;font-weight:500;color:var(--text);transition:color .2s}
.nav-menu a:hover{color:var(--primary)}
.nav-dl{font-size:14px;padding:7px 18px}

/* ===== Hero ===== */
#home{
  background:linear-gradient(180deg,var(--bg-soft) 0%,var(--bg) 92%);
  padding:calc(var(--nav-h) + 64px) 0 96px;
}
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-txt h1{
  font-size:clamp(44px,6vw,64px);font-weight:900;color:var(--deep);line-height:1.15;letter-spacing:1px;
}
.hero-txt h1 .dot{color:var(--primary-deep)}
.ver-badge{display:inline-flex;align-items:center;margin-left:10px;vertical-align:middle}
.hero-desc{color:var(--muted);font-size:16px;margin:18px 0 8px;max-width:520px}
.hero-sub{color:var(--text);font-weight:600;font-size:17px;margin-top:26px}
.persona-list{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;max-width:560px;margin:14px 0 28px}
.persona{text-align:center;transition:transform .25s}
.persona:hover{transform:translateY(-4px)}
.persona img{
  width:100%;aspect-ratio:1;object-fit:cover;border-radius:50%;
  border:2px solid #fff;box-shadow:var(--shadow);
}
.persona span{display:block;margin-top:7px;font-size:12px;color:var(--muted);font-weight:500}
.hero-btn{font-size:16px;padding:15px 40px}
.hero-side{display:flex;justify-content:center}

/* ===== 聊天窗口 ===== */
.chat-card{width:100%;max-width:420px;border-radius:24px;overflow:hidden}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 16px;border-bottom:1px solid var(--border);background:var(--card)}
.chat-ava{width:46px;height:46px;border-radius:50%;object-fit:cover;border:2px solid var(--primary-soft)}
.chat-meta{display:flex;flex-direction:column;line-height:1.35}
.chat-name{font-weight:800;color:var(--deep);font-size:15px}
.chat-status{font-size:12px;color:var(--green);display:flex;align-items:center;gap:5px}
.chat-status i{width:7px;height:7px;border-radius:50%;background:var(--green);display:inline-block}
.chat-body{
  height:340px;overflow-y:auto;padding:18px 16px;background:var(--bg-soft);
  display:flex;flex-direction:column;gap:12px;
}
.msg{max-width:78%;padding:10px 14px;border-radius:16px;font-size:14px;line-height:1.55;animation:msgIn .35s ease}
@keyframes msgIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.msg.ai{align-self:flex-start;background:#fff;border:1px solid var(--border);color:var(--text);border-bottom-left-radius:4px}
.msg.user{align-self:flex-end;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border-bottom-right-radius:4px}
.chat-input{display:flex;align-items:center;gap:8px;padding:12px 14px;border-top:1px solid var(--border);background:var(--card)}
.chat-input input{
  flex:1;min-width:0;border:1px solid var(--border);border-radius:999px;
  padding:11px 16px;font-size:16px;color:var(--text);background:var(--bg);outline:none;
}
.chat-send{
  width:44px;height:44px;flex:none;border-radius:50%;border:0;cursor:pointer;
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;
  display:flex;align-items:center;justify-content:center;transition:background .3s,transform .2s;
}
.chat-send svg{width:20px;height:20px}
.chat-send:hover{transform:scale(1.06)}
.chat-send.disabled{background:#E0CED9;cursor:not-allowed}
.chat-send.disabled:hover{transform:none}

/* ===== 三步上手 ===== */
#steps{background:var(--bg)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{padding:34px 28px;position:relative}
.step-num{
  position:absolute;top:22px;right:24px;font-size:42px;font-weight:900;line-height:1;
  color:var(--primary-soft);letter-spacing:1px;
}
.step-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:18px;
}
.step-icon svg{width:26px;height:26px}
.step h3{font-size:19px;font-weight:800;color:var(--deep);margin-bottom:8px}
.step p{font-size:14px;color:var(--muted)}

/* ===== 产品介绍 ===== */
#intro{background:var(--bg-soft)}
.intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.intro h2{font-size:30px;font-weight:800;color:var(--deep);line-height:1.35}
.intro p{color:var(--muted);margin:16px 0 24px;font-size:15px}
.check-list li{display:flex;align-items:flex-start;gap:10px;margin-bottom:14px;font-size:15px;color:var(--text);font-weight:500}
.check-list svg{width:22px;height:22px;flex:none;color:var(--green);margin-top:2px}
.intro-img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow)}

/* ===== 四大核心功能 ===== */
#features{background:var(--bg)}
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feat{padding:30px 26px}
.feat-icon{
  width:52px;height:52px;border-radius:15px;background:var(--primary-soft);color:var(--primary-deep);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.feat-icon svg{width:25px;height:25px}
.feat h3{font-size:18px;font-weight:800;color:var(--deep);margin-bottom:8px}
.feat-pain{
  font-size:13px;color:var(--primary-deep);background:var(--primary-soft);
  border-radius:8px;padding:6px 10px;margin-bottom:10px;font-weight:600;display:inline-block;
}
.feat p{font-size:14px;color:var(--muted)}

/* ===== 优势对比 ===== */
#compare{background:var(--bg-soft)}
.cmp-wrap{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow)}
.cmp-table{width:100%;min-width:640px;border-collapse:collapse;background:var(--card)}
.cmp-table th,.cmp-table td{padding:15px 18px;text-align:center;font-size:14px}
.cmp-table thead th{background:var(--deep);color:#fff;font-weight:700;font-size:15px}
.cmp-table tbody th{
  text-align:left;color:var(--deep);font-weight:700;background:#FFF9FC;width:18%;
}
.cmp-table tbody tr{border-top:1px solid var(--border)}
.cmp-table .col-pro{background:var(--primary-soft);font-weight:600}
.cmp-hint{display:none;text-align:center;color:var(--muted);font-size:12px;margin-top:10px}
.cmp-hint svg{width:14px;height:14px;vertical-align:-2px}

/* ===== 使用场景 ===== */
#scenes{background:var(--bg)}
.scene-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;max-width:860px;margin:0 auto 56px}
.scene-item{
  display:flex;align-items:center;gap:12px;padding:16px 20px;font-size:15px;color:var(--text);font-weight:500;
}
.scene-item svg{width:22px;height:22px;flex:none;color:var(--green)}
.vs-wrap{display:grid;grid-template-columns:1fr 92px 1fr;gap:0;align-items:stretch;max-width:980px;margin:0 auto}
.vs-card{padding:34px 32px}
.vs-card h3{font-size:20px;font-weight:800;margin-bottom:18px}
.vs-card ul li{display:flex;align-items:flex-start;gap:10px;margin-bottom:12px;font-size:14px;color:var(--muted)}
.vs-card ul svg{width:20px;height:20px;flex:none;margin-top:2px}
.vs-alone{border-color:var(--border);background:var(--bg)}
.vs-alone h3{color:var(--muted)}
.vs-alone ul svg{color:#C9BBC8}
.vs-together{background:linear-gradient(180deg,#FFF,var(--primary-soft));border-color:var(--primary)}
.vs-together h3{color:var(--primary-deep)}
.vs-together ul svg{color:var(--green)}
.vs-badge{
  display:flex;align-items:center;justify-content:center;
}
.vs-badge span{
  width:56px;height:56px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));
  color:#fff;font-weight:900;font-size:16px;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-hover);letter-spacing:1px;
}

/* ===== 数据模块 ===== */
#data{background:var(--deep)}
#data .sec-head .sec-title{color:#fff}
#data .sec-head .sec-sub{color:rgba(255,255,255,.65)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);padding:34px 20px;text-align:center;
}
.stat-num{font-size:44px;font-weight:900;color:#fff;line-height:1.2}
.stat-label{color:rgba(255,255,255,.72);font-size:14px;margin-top:6px}

/* ===== 人设定制 ===== */
#custom{background:var(--bg-soft)}
.custom-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:56px;align-items:center}
.custom-txt h2{font-size:30px;font-weight:800;color:var(--deep);line-height:1.4}
.custom-txt h2 em{font-style:normal;color:var(--primary-deep)}
.custom-txt p{color:var(--muted);margin:16px 0 24px;font-size:15px}
.custom-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.custom-tags span{
  background:var(--card);border:1px solid var(--border);color:var(--text);
  border-radius:999px;padding:7px 16px;font-size:13px;font-weight:600;
}
.custom-btn{font-size:15px;padding:13px 34px}
.custom-img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow)}

/* ===== 用户评价 ===== */
#reviews{background:var(--bg)}
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rev{padding:26px 24px}
.rev-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.rev-ava{
  width:44px;height:44px;flex:none;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;
}
.rev-meta{display:flex;flex-direction:column;line-height:1.3}
.rev-name{font-weight:700;color:var(--deep);font-size:15px}
.rev-stars{color:#FFB800;font-size:14px;letter-spacing:2px}
.rev p{font-size:14px;color:var(--muted);line-height:1.7}

/* ===== 隐私安全 ===== */
#privacy{background:var(--bg-soft)}
.priv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.priv{padding:30px 26px}
.priv-icon{
  width:52px;height:52px;border-radius:15px;background:var(--primary-soft);color:var(--primary-deep);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.priv-icon svg{width:25px;height:25px}
.priv h3{font-size:17px;font-weight:800;color:var(--deep);margin-bottom:8px}
.priv p{font-size:14px;color:var(--muted)}

/* ===== 版本更新 ===== */
#version{background:var(--bg)}
.ver-card{max-width:720px;margin:0 auto;padding:36px 40px}
.ver-top{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:18px}
.ver-top h3{font-size:24px;font-weight:800;color:var(--deep)}
.ver-date{color:var(--muted);font-size:14px;margin-left:auto}
.ver-list li{
  position:relative;padding-left:20px;margin-bottom:10px;font-size:15px;color:var(--text);
}
.ver-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  background:var(--primary);
}

/* ===== FAQ ===== */
#faq{background:var(--bg-soft)}
.faq-list{max-width:760px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:14px;overflow:hidden}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:19px 22px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--deep);
}
.faq-q .faq-arrow{flex:none;color:var(--primary-deep);transition:transform .3s;width:20px;height:20px}
.faq-item.open .faq-q .faq-arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 22px 20px;color:var(--muted);font-size:14px;line-height:1.75}

/* ===== 下载区域 ===== */
#download{
  background:linear-gradient(180deg,var(--bg-soft),var(--bg) 60%);
  text-align:center;
}
.dl-wrap{max-width:760px;margin:0 auto}
.dl-wrap h1{font-size:clamp(34px,5vw,46px);font-weight:900;color:var(--deep);letter-spacing:1px}
.dl-wrap h1 .dot{color:var(--primary-deep)}
.dl-meta{margin:14px 0 34px;font-size:14px;color:var(--muted)}
.dl-meta b{color:var(--text);font-weight:600}
.dl-btns{display:flex;justify-content:center;gap:18px}
.dl-btn{font-size:16px;padding:16px 40px}
.dl-tip{margin-top:26px;color:var(--muted);font-size:14px}

/* ===== 页脚 ===== */
.footer{background:var(--deep);color:rgba(255,255,255,.75);text-align:center;padding:30px 20px;font-size:14px}
.footer a{color:#fff;font-weight:600;transition:color .2s}
.footer a:hover{color:var(--primary)}

/* ===== 返回顶部 ===== */
.to-top{
  position:fixed;right:24px;bottom:26px;z-index:98;width:46px;height:46px;border-radius:50%;border:0;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(10px);
  transition:opacity .3s,visibility .3s,transform .3s;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top svg{width:20px;height:20px}

/* ===== 响应式 ===== */
@media (max-width:1100px){
  .persona-list{grid-template-columns:repeat(3,1fr);max-width:440px;margin:14px auto 28px}
  .feat-grid,.priv-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .rev-grid{grid-template-columns:repeat(2,1fr)}
  .sec-title{font-size:28px}
}
@media (max-width:900px){
  .nav-menu{display:none}
  .hero{grid-template-columns:1fr;gap:44px;padding-top:calc(var(--nav-h) + 40px)}
  .hero-side{justify-content:center}
  .intro-grid,.custom-grid{grid-template-columns:1fr;gap:36px}
  .intro-img,.custom-img{max-width:520px;margin:0 auto}
  .vs-wrap{grid-template-columns:1fr;gap:16px}
  .vs-badge span{width:48px;height:48px;font-size:14px}
  .steps{grid-template-columns:1fr}
}
@media (max-width:768px){
  .container{padding:0 20px}
  section{padding:64px 0}
  .nav-in{padding:0 20px}
  .nav-dl{padding:12px 22px}
  .hero{padding-bottom:64px}
  .hero-desc{font-size:15px}
  .hero-sub{text-align:center}
  .hero-btn{width:100%;font-size:15px;padding:14px 0}
  .custom-btn{width:100%;font-size:15px;padding:15px 0}
  .chat-body{height:300px}
  .scene-list{grid-template-columns:1fr}
  .cmp-hint{display:block}
  .dl-btns{flex-direction:column;gap:14px}
  .dl-btn{width:100%;font-size:15px;padding:15px 0}
  .dl-meta{font-size:12px;white-space:nowrap}
  .dl-tip{font-size:13px}
}
@media (max-width:640px){
  .feat-grid,.priv-grid,.rev-grid{grid-template-columns:1fr}
  .chat-body{height:270px}
  .sec-title{font-size:24px}
  .stat-num{font-size:34px}
  .ver-card{padding:28px 22px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .msg,.card,.btn,.step-icon,.chat-send,.to-top,.faq-arrow{animation:none;transition:none}
}