/* ============ AI聊天软件 官网落地页 样式 ============ */
: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;
  --orange:#F59E0B;
  --gold:#F5A623;
  --radius:18px;
  --shadow:0 10px 30px rgba(240,61,116,.08);
  --shadow-hover:0 18px 42px rgba(240,61,116,.16);
  --nav-h:64px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
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;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font-family:inherit;cursor:pointer}

.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

/* ---- 按钮 ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));
  color:#fff;border:0;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1;
  padding:12px 26px;min-height:44px;
  box-shadow:0 8px 20px rgba(240,61,116,.22);
  transition:transform .25s,box-shadow .25s;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(240,61,116,.32)}
.btn-lg{font-size:16px;padding:15px 34px;min-height:50px}

/* ---- 区块 ---- */
.section{padding:92px 0}
.bg-soft{background:var(--bg-soft)}
.sec-title{font-size:32px;line-height:1.35;font-weight:700;text-align:center;color:var(--deep)}
.sec-sub{text-align:center;color:var(--muted);margin:10px 0 44px}
.card-title{font-size:18px;font-weight:700;color:var(--deep)}
.card-text{font-size:15px;color:var(--text);line-height:1.75}
.lead-text{font-size:16px;color:var(--text);margin:16px 0 24px}

/* ============ 1. 顶部固定粘性导航 ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--nav-h);
  background:var(--card);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s,border-color .25s;
}
.nav.nav-shadow{box-shadow:0 6px 24px rgba(42,26,61,.10);border-color:var(--border)}
.nav-inner{
  max-width:1180px;margin:0 auto;height:100%;
  padding:0 24px;
  display:flex;align-items:center;gap:28px;
}
.nav-logo{font-size:18px;font-weight:800;color:var(--deep);letter-spacing:.5px;white-space:nowrap}
.nav-logo::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--primary);margin-right:8px;vertical-align:2px}
.nav-menu{display:flex;gap:26px;margin-left:auto}
.nav-menu a{font-size:15px;color:var(--text);font-weight:500;transition:color .2s;white-space:nowrap}
.nav-menu a:hover{color:var(--primary)}
.btn-nav{font-size:14px;padding:9px 18px;min-height:38px;box-shadow:0 6px 16px rgba(240,61,116,.20)}

/* ============ 2. 首屏 Hero ============ */
.hero{
  padding:calc(var(--nav-h) + 56px) 0 80px;
  background:
    radial-gradient(600px 340px at 85% 8%,rgba(255,228,238,.65),transparent 60%),
    radial-gradient(520px 300px at 8% 88%,rgba(240,61,116,.08),transparent 60%),
    var(--bg);
}
.hero-top{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hero-title{font-size:44px;line-height:1.3;font-weight:800;color:var(--deep)}
.hero-version{
  display:inline-block;vertical-align:middle;margin-left:8px;
  font-size:15px;font-weight:700;color:var(--primary-deep);
  background:var(--primary-soft);border-radius:999px;padding:4px 14px;
}
.hero-intro{font-size:16px;color:var(--text);margin:18px 0 26px;max-width:520px}
.hero-btn{margin-top:26px}

/* 聊天窗口 */
.chat{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:22px;
  box-shadow:var(--shadow);
  overflow:hidden;
  max-width:520px;
}
.chat-head{
  display:flex;align-items:center;gap:12px;
  padding:14px 18px;
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));
  color:#fff;
}
.chat-avatar{width:52px;height:52px;border-radius:50%;border:2px solid rgba(255,255,255,.85);object-fit:cover}
.chat-head-info{min-width:0}
.chat-name{font-size:17px;font-weight:700;line-height:1.3}
.chat-status{font-size:12.5px;line-height:1.5;opacity:.95}
.chat-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--green);margin-right:5px;vertical-align:1px;box-shadow:0 0 0 3px rgba(46,197,126,.25)}
.chat-body{
  padding:18px 16px 8px;
  min-height:300px;
  max-height:340px;
  overflow-y:auto;
  background:var(--bg);
  display:flex;flex-direction:column;gap:14px;
}
.chat-msg{display:flex;align-items:flex-end;gap:8px;max-width:86%}
.chat-msg .msg-avatar{width:34px;height:34px;border-radius:50%;object-fit:cover;flex-shrink:0}
.msg-bubble{
  padding:10px 14px;border-radius:16px;
  font-size:14.5px;line-height:1.65;color:var(--text);
  background:var(--card);border:1px solid var(--border);
  border-bottom-left-radius:4px;
  animation:bubbleIn .3s ease;
}
.chat-msg.user{flex-direction:row-reverse;margin-left:auto}
.chat-msg.user .msg-bubble{
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));
  color:#fff;border:0;border-bottom-right-radius:4px;
}
.chat-input{
  display:flex;align-items:center;gap:10px;
  padding:12px 16px 14px;
  background:var(--card);
  border-top:1px solid var(--border);
}
.chat-input input{
  flex:1;min-width:0;height:42px;padding:0 16px;
  border:1px solid var(--border);border-radius:999px;
  background:var(--bg-soft);color:var(--text);font-size:13.5px;
  outline:none;
}
.chat-send{
  flex-shrink:0;height:42px;min-width:70px;padding:0 18px;
  border:0;border-radius:999px;font-size:14px;font-weight:600;color:#fff;
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));
  box-shadow:0 6px 16px rgba(240,61,116,.22);
  transition:background .25s,transform .25s,box-shadow .25s,opacity .25s;
}
.chat-send:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(240,61,116,.3)}
.chat-send:disabled{
  background:#D8CCE0;color:#fff;box-shadow:none;cursor:not-allowed;
  transform:none;
}

/* 人设墙 */
.persona-title{font-size:17px;font-weight:700;color:var(--deep);margin-bottom:16px;text-align:center}
.persona-wall{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.persona-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:10px 8px 12px;
  text-align:center;
  transition:transform .25s,box-shadow .25s;
}
.persona-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.persona-avatar{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:14px}
.persona-label{font-size:12.5px;font-weight:600;color:var(--deep);margin-top:10px;line-height:1.5}

/* ============ 3. 三步上手 ============ */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}
.step-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:34px 28px;
  position:relative;
  transition:transform .25s,box-shadow .25s;
}
.step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:46px;height:46px;border-radius:14px;margin-bottom:18px;
  background:var(--primary-soft);color:var(--primary-deep);
  font-size:17px;font-weight:800;
}
.step-card .card-title{margin-bottom:10px}
.step-card .card-text{color:var(--muted)}

/* ============ 4. 产品介绍 ============ */
.product-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.product-copy .check-list{margin-top:8px}
.check-list li{
  position:relative;padding-left:34px;margin-bottom:14px;
  font-size:16px;color:var(--text);font-weight:500;
}
.check-list li::before{
  content:"✔";
  position:absolute;left:0;top:1px;
  width:22px;height:22px;border-radius:50%;
  background:var(--primary-soft);color:var(--primary-deep);
  font-size:13px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.product-img{
  width:100%;max-width:520px;border-radius:24px;margin:0 auto;
  box-shadow:var(--shadow);
}

/* ============ 5. 四大核心功能 ============ */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:48px}
.feature-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:30px 26px;
  transition:transform .25s,box-shadow .25s;
}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.feat-icon{width:52px;height:52px;color:var(--primary-deep);background:var(--primary-soft);border-radius:14px;padding:13px;margin-bottom:18px}
.feature-card .card-title{margin-bottom:8px}
.pain-text{
  font-size:13px;color:var(--primary-deep);
  background:var(--primary-soft);
  border-radius:8px;padding:7px 10px;margin-bottom:12px;
  line-height:1.5;
}
.feature-card .card-text{color:var(--muted)}

/* ============ 6. 优势对比 ============ */
.table-scroll{margin-top:44px;overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius)}
.compare-table{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius);overflow:hidden;font-size:15px}
.compare-table col:nth-child(1){width:22%}
.compare-table col:nth-child(n+2){width:26%}
.compare-table th,.compare-table td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--border)}
.compare-table thead th{
  background:var(--deep);color:#fff;font-weight:700;font-size:15.5px;
}
.compare-table tbody th{background:var(--bg-soft);color:var(--deep);font-weight:600;white-space:nowrap}
.compare-table td{color:var(--text)}
.compare-table td.col-good{
  background:var(--primary-soft);color:var(--primary-deep);font-weight:700;
}
.compare-table tbody tr:last-child th,.compare-table tbody tr:last-child td{border-bottom:0}
.table-hint{display:none;text-align:center;font-size:13px;color:var(--muted);margin-top:14px}

/* ============ 7. 使用场景 ============ */
.scene-list{
  max-width:760px;margin:44px auto 0;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:34px 40px;
}
.scene-list li{
  position:relative;padding-left:30px;margin-bottom:14px;
  font-size:16px;color:var(--text);
}
.scene-list li:last-child{margin-bottom:0}
.scene-list li::before{
  content:"✔";position:absolute;left:0;top:1px;
  width:20px;height:20px;border-radius:50%;
  background:var(--primary-soft);color:var(--primary-deep);
  font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.vs-wrap{
  display:grid;grid-template-columns:1fr auto 1fr;gap:22px;
  margin-top:52px;align-items:stretch;
}
.vs-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:34px 30px;
  transition:transform .25s,box-shadow .25s;
}
.vs-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.vs-card .card-title{margin-bottom:12px}
.vs-card .card-text{color:var(--muted)}
.vs-card-bad{background:var(--bg-soft)}
.vs-card-good{border-color:var(--primary);background:var(--card)}
.vs-card-good .card-title{color:var(--primary-deep)}
.vs-badge{
  align-self:center;
  width:56px;height:56px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#fff;font-size:15px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 24px rgba(240,61,116,.3);
}

/* ============ 8. 数据模块 ============ */
.data-section{
  background:
    radial-gradient(560px 300px at 12% 10%,rgba(255,92,138,.16),transparent 60%),
    radial-gradient(640px 340px at 88% 90%,rgba(255,92,138,.12),transparent 60%),
    var(--deep);
  padding:92px 0;
}
.data-section .sec-title{color:#fff;margin-bottom:52px}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.data-item{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius);
  padding:34px 20px;text-align:center;
  transition:transform .25s,box-shadow .25s;
}
.data-item:hover{transform:translateY(-6px);box-shadow:0 18px 42px rgba(0,0,0,.28)}
.data-num{
  display:block;font-size:40px;font-weight:800;color:#fff;line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.data-item p{color:#EADCF7;font-size:14.5px;margin-top:8px}

/* ============ 9. 人设定制 ============ */
.persona-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:60px;align-items:center}
.persona-img{width:100%;max-width:520px;border-radius:24px;margin:0 auto;box-shadow:var(--shadow)}
.persona-copy .sec-title{text-align:left}
.persona-copy .btn{margin-top:8px}

/* ============ 10. 用户真实评价 ============ */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}
.review-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:26px 24px;
  transition:transform .25s,box-shadow .25s;
}
.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.review-avatar{
  width:50px;height:50px;border-radius:50%;flex-shrink:0;
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#fff;font-size:19px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.review-name{font-size:15.5px;font-weight:700;color:var(--deep);line-height:1.4}
.review-stars{font-size:15px;color:var(--gold);letter-spacing:2px;line-height:1.4}
.review-text{font-size:14.5px;color:var(--text);line-height:1.75}

/* ============ 11. 隐私安全 ============ */
.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:48px}
.privacy-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:30px 26px;
  transition:transform .25s,box-shadow .25s;
}
.privacy-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.privacy-icon{width:50px;height:50px;color:var(--primary-deep);background:var(--primary-soft);border-radius:14px;padding:12px;margin-bottom:18px}
.privacy-card .card-title{margin-bottom:10px}
.privacy-card .card-text{color:var(--muted);font-size:14.5px}

/* ============ 12. 版本更新 ============ */
.version-card{
  max-width:760px;margin:44px auto 0;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:36px 40px;
}
.version-head{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.version-tag{
  background:linear-gradient(90deg,var(--primary),var(--primary-deep));
  color:#fff;font-size:17px;font-weight:800;border-radius:999px;padding:6px 18px;
}
.version-date{font-size:14px;color:var(--muted)}
.version-list li{
  position:relative;padding-left:14px;margin-bottom:12px;
  font-size:15px;color:var(--text);line-height:1.7;
}
.version-list li:last-child{margin-bottom:0}
.version-list li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--primary)}
.version-list strong{
  display:inline-block;font-size:12px;font-weight:700;color:#fff;
  border-radius:6px;padding:2px 8px;margin-right:8px;vertical-align:1px;
}
.version-list li:nth-child(1) strong,.version-list li:nth-child(2) strong{background:var(--green)}
.version-list li:nth-child(3) strong,.version-list li:nth-child(4) strong{background:var(--primary)}
.version-list li:nth-child(5) strong{background:var(--orange)}

/* ============ 13. FAQ ============ */
.faq-list{max-width:820px;margin:44px auto 0}
.faq-item{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  margin-bottom:16px;
  overflow:hidden;
}
.faq-item:last-child{margin-bottom:0}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;padding:20px 24px;
  font-size:16px;font-weight:600;color:var(--deep);text-align:left;min-height:56px;
}
.faq-icon{
  position:relative;flex-shrink:0;width:22px;height:22px;border-radius:50%;
  background:var(--primary-soft);
  transition:transform .3s;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  background:var(--primary-deep);border-radius:2px;
}
.faq-icon::before{width:10px;height:2px}
.faq-icon::after{width:2px;height:10px}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 24px 22px;font-size:15px;color:var(--text);line-height:1.75}

/* ============ 14. 下载区域 ============ */
.download-section{
  background:linear-gradient(135deg,var(--deep) 0%,#3A2456 55%,var(--primary-deep) 130%);
  padding:96px 0 88px;text-align:center;
}
.download-title{font-size:36px;font-weight:800;color:#fff}
.download-version{
  display:inline-block;vertical-align:middle;margin-left:10px;
  font-size:15px;font-weight:700;color:#fff;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);
  border-radius:999px;padding:4px 14px;
}
.download-meta{font-size:14.5px;color:#EADCF7;margin:16px 0 34px}
.download-btns{display:flex;justify-content:center;gap:22px;flex-wrap:wrap}
.btn-download{min-width:280px}
.btn-ios{background:#fff;color:var(--primary-deep);box-shadow:0 10px 26px rgba(0,0,0,.24)}
.btn-ios:hover{box-shadow:0 16px 34px rgba(0,0,0,.3)}
.download-note{margin-top:26px;font-size:15px;color:#FFD9E6}

/* ============ 15. 底部页脚 ============ */
.footer{background:var(--deep);padding:34px 0;text-align:center}
.footer-line{font-size:14px;color:#D9CCE8}
.footer-link{color:#fff;text-decoration:none;font-weight:600;transition:color .2s}
.footer-link:hover{color:var(--primary)}
.footer-sub{font-size:12.5px;color:#9B88B3;margin-top:6px}

/* ============ 16. 返回顶部 ============ */
.to-top{
  position:fixed;right:26px;bottom:26px;z-index:99;
  width:48px;height:48px;border-radius:50%;border:0;
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#fff;box-shadow:0 10px 24px rgba(240,61,116,.32);
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s,visibility .3s,transform .3s;
}
.to-top svg{width:20px;height:20px}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}

/* ============ 响应式：平板/手机 ============ */
@media (max-width:1100px){
  .section{padding:72px 0}
  .sec-title{font-size:28px}
  .hero{padding:calc(var(--nav-h) + 44px) 0 64px}
  .hero-title{font-size:38px}
  .persona-wall{grid-template-columns:repeat(3,1fr)}
  .feature-grid,.privacy-grid,.data-grid,.review-grid{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:900px){
  .nav-menu{display:none}
  .nav-inner{gap:16px}
  .btn-nav{margin-left:auto}
  .hero-top{grid-template-columns:1fr;gap:40px}
  .hero-copy{max-width:620px;margin:0 auto}
  .chat{margin:0 auto}
  .hero-persona{margin-top:48px}
  .product-grid,.persona-grid{grid-template-columns:1fr;gap:44px}
  .product-copy .sec-title,.persona-copy .sec-title{text-align:center}
  .product-copy .check-list{max-width:520px;margin:0 auto}
  .persona-copy .lead-text{text-align:center}
  .persona-copy .btn{display:flex;width:fit-content;margin:8px auto 0}
  .steps-grid{grid-template-columns:repeat(3,1fr)}
  .vs-wrap{grid-template-columns:1fr;gap:20px}
  .vs-badge{margin:0 auto}
}

@media (max-width:768px){
  .wrap{padding:0 20px}
  .nav-inner{padding:0 20px}
  .section{padding:58px 0}
  .data-section{padding:60px 0}
  .download-section{padding:68px 0 60px}
  .hero{padding:calc(var(--nav-h) + 36px) 0 52px}
  .hero-title{font-size:32px}
  .hero-version{font-size:13px;padding:3px 12px}
  .hero-intro{font-size:15px}
  .hero-btn{display:flex;width:100%}
  .chat-body{min-height:260px}
  .chat-input input{font-size:16px}
  .steps-grid{grid-template-columns:1fr;gap:16px;margin-top:34px}
  .step-card{padding:26px 22px}
  .sec-sub{margin:8px 0 32px}
  .feature-grid,.privacy-grid,.data-grid,.review-grid{gap:16px;margin-top:34px}
  .data-item{padding:26px 14px}
  .data-num{font-size:32px}
  .compare-table{min-width:640px}
  .compare-table th,.compare-table td{padding:13px 16px;font-size:14px}
  .table-hint{display:block}
  .scene-list{padding:26px 22px;margin-top:34px}
  .scene-list li{font-size:15px}
  .vs-wrap{margin-top:40px}
  .vs-card{padding:26px 22px}
  .version-card{padding:28px 22px;margin-top:34px}
  .faq-list{margin-top:34px}
  .download-btns{flex-direction:column;align-items:stretch;gap:14px}
  .btn-download{width:100%;min-width:0}
  .download-title{font-size:30px}
  .download-meta{font-size:12.5px;margin:14px 0 26px;white-space:nowrap}
  .download-note{font-size:14px}
  .to-top{right:18px;bottom:18px}
}

@media (max-width:640px){
  .feature-grid,.privacy-grid,.review-grid{grid-template-columns:1fr}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .chat-body{min-height:228px;padding:14px 12px 6px}
  .msg-bubble{font-size:13.5px;padding:9px 12px}
  .chat-msg{max-width:92%}
  .persona-grid{gap:10px}
  .persona-card{padding:8px 6px 10px}
  .persona-label{font-size:11.5px}
  .sec-title{font-size:24px}
  .card-title{font-size:17px}
  .nav-logo{font-size:16px}
  .btn-nav{font-size:13px;padding:8px 14px;min-height:36px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
}