/* ==========================================================
   talkmaker 无限词版 V5.0.28 · 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;
  --gold:#FFB400;
  --radius:18px;
  --shadow:0 10px 30px rgba(240,61,116,.08);
  --shadow-hover:0 18px 42px rgba(240,61,116,.16);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:74px}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* 通用按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border:none;border-radius:999px;font-weight:600;cursor:pointer;min-height:48px;padding:0 28px;font-size:16px;transition:transform .25s,box-shadow .25s;box-shadow:var(--shadow)}
.btn:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.btn-sm{min-height:40px;padding:0 20px;font-size:14px}
.btn-lg{min-height:56px;padding:0 42px;font-size:18px}

/* 通用卡片 */
.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)}

/* 区块标题 */
.sec{padding:84px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 46px}
.sec-title{font-size:34px;font-weight:800;color:var(--deep);line-height:1.35}
.sec-sub{margin-top:12px;font-size:16px;color:var(--muted)}

/* ============ 1. 顶部固定导航 ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,249,251,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.nav.scrolled{box-shadow:0 8px 26px rgba(240,61,116,.12)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;gap:20px}
.nav-logo{font-size:22px;font-weight:800;color:var(--deep);display:inline-flex;align-items:center;gap:8px;letter-spacing:.5px}
.nav-logo .dot{width:12px;height:12px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));box-shadow:0 0 0 4px var(--primary-soft)}
.nav-menu{display:flex;gap:2px;margin-left:auto}
.nav-menu a{padding:8px 14px;border-radius:999px;font-size:15px;color:var(--text);transition:background .25s,color .25s}
.nav-menu a:hover{background:var(--primary-soft);color:var(--primary-deep)}
.nav-dl{margin-left:10px}

/* ============ 2. 首屏 Hero ============ */
.hero{padding:128px 0 84px;background:linear-gradient(180deg,#FFF1F7 0%,#FFF9FB 72%)}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.hero h1{font-size:46px;line-height:1.25;color:var(--deep);font-weight:800}
.ver-badge{display:inline-block;vertical-align:middle;margin-left:12px;background:var(--primary-soft);color:var(--primary-deep);font-size:13px;font-weight:700;padding:4px 14px;border-radius:999px;border:1px solid var(--border)}
.hero-desc{margin:20px 0 30px;font-size:17px;color:var(--muted);max-width:520px}
.hero-label{display:inline-flex;align-items:center;gap:8px;font-size:17px;font-weight:700;color:var(--deep);margin-bottom:16px}
.hero-label::before{content:"";width:8px;height:8px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep))}
.persona-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;max-width:520px}
.persona{text-align:center;cursor:default}
.persona img{width:100%;aspect-ratio:1/1;border-radius:50%;border:3px solid #fff;box-shadow:var(--shadow);object-fit:cover;transition:transform .25s,box-shadow .25s}
.persona:hover img{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.persona span{display:block;margin-top:10px;font-size:13px;font-weight:600;color:var(--text);line-height:1.4}
.persona .tag{color:var(--primary-deep)}
.hero-cta{margin-top:34px}

/* 聊天窗口 */
.chat{background:var(--card);border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow-hover);overflow:hidden;max-width:460px;margin-left:auto;width:100%}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--border);background:#fff}
.chat-head img{width:44px;height:44px;border-radius:50%;object-fit:cover;flex:none}
.chat-user{display:flex;flex-direction:column;line-height:1.35}
.chat-name{font-weight:700;color:var(--deep);font-size:15px}
.chat-status{font-size:12px;color:var(--green);display:inline-flex;align-items:center;gap:5px}
.chat-status::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green)}
.chat-body{height:356px;overflow-y:auto;padding:18px;background:linear-gradient(180deg,#FFF7FB,#FFF0F6);display:flex;flex-direction:column;gap:12px}
.msg{display:flex;gap:10px;max-width:84%;animation:fadeUp .35s ease}
.msg .ava{width:32px;height:32px;border-radius:50%;overflow:hidden;flex:none;align-self:flex-end}
.msg .ava img{width:100%;height:100%;object-fit:cover}
.msg .bubble{background:#fff;border:1px solid var(--border);padding:10px 14px;border-radius:14px;border-top-left-radius:4px;font-size:14px;color:var(--text);line-height:1.65;box-shadow:0 2px 8px rgba(240,61,116,.05)}
.msg.user{align-self:flex-end;flex-direction:row-reverse}
.msg.user .bubble{background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border:none;border-radius:14px;border-top-right-radius:4px;box-shadow:var(--shadow)}
.typing .bubble{display:inline-flex;gap:5px;align-items:center;padding:12px 16px}
.typing .dot{width:6px;height:6px;border-radius:50%;background:var(--primary);animation:blink 1.2s infinite}
.typing .dot:nth-child(2){animation-delay:.2s}
.typing .dot:nth-child(3){animation-delay:.4s}
.chat-input{display:flex;gap:10px;padding:14px;border-top:1px solid var(--border);background:#fff}
.chat-input input{flex:1;min-height:44px;border:1px solid var(--border);border-radius:999px;padding:0 18px;font-size:14px;color:var(--muted);background:var(--bg);outline:none;cursor:default}
.send-btn{min-width:68px;min-height:44px;padding:0 18px;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border:none;border-radius:999px;font-size:15px;font-weight:600;cursor:pointer;transition:opacity .25s,transform .25s,box-shadow .25s;box-shadow:var(--shadow)}
.send-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.send-btn:disabled,.send-btn.disabled{background:#EBD9E4;box-shadow:none;transform:none;cursor:not-allowed;color:#fff}

@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes blink{0%,80%,100%{opacity:.3}40%{opacity:1}}

/* ============ 3. 三步上手 ============ */
.steps{padding:84px 0}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{padding:32px 28px}
.step-num{width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:20px;font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:18px;box-shadow:var(--shadow)}
.step h3{font-size:19px;color:var(--deep);margin-bottom:8px}
.step p{font-size:14px;color:var(--muted)}

/* ============ 4. 产品介绍 ============ */
.intro{padding:84px 0;background:var(--bg-soft)}
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.intro-img{border-radius:var(--radius);box-shadow:var(--shadow-hover);width:100%;aspect-ratio:1/1;object-fit:cover}
.intro h2{font-size:32px;font-weight:800;color:var(--deep);line-height:1.35;margin-bottom:16px}
.intro .lead{font-size:16px;color:var(--muted);margin-bottom:24px}
.check-list li{display:flex;align-items:flex-start;gap:10px;padding:9px 0;font-size:15px;color:var(--text)}
.check-list svg{width:20px;height:20px;flex:none;margin-top:4px}
.intro-cta{display:flex;margin:26px auto 0}

/* ============ 5. 四大核心功能 ============ */
.features{padding:84px 0}
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feat{padding:28px 26px}
.feat-icon{width:52px;height:52px;border-radius:14px;background:var(--primary-soft);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feat-icon svg{width:26px;height:26px}
.feat h3{font-size:18px;color:var(--deep);margin-bottom:8px}
.feat .pain{display:inline-block;font-size:13px;font-weight:600;color:var(--primary-deep);background:var(--primary-soft);padding:2px 10px;border-radius:999px;margin-bottom:10px;border:1px solid var(--border)}
.feat p{font-size:14px;color:var(--muted)}

/* ============ 6. 优势对比 ============ */
.compare{padding:84px 0;background:var(--bg-soft)}
.table-wrap{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow);background:#fff}
table{width:100%;min-width:640px;table-layout:fixed;border-collapse:separate;border-spacing:0;background:#fff}
th,td{padding:15px 16px;text-align:center;font-size:14px;border-bottom:1px solid var(--border)}
thead th{background:var(--deep);color:#fff;font-weight:700;font-size:15px}
thead th:first-child{border-top-left-radius:var(--radius)}
thead th:last-child{border-top-right-radius:var(--radius)}
tbody tr:last-child td{border-bottom:none}
td.dim{text-align:left;font-weight:600;color:var(--deep)}
td.best{background:var(--primary-soft);color:var(--primary-deep);font-weight:600}
tbody td{color:var(--text)}
.scroll-hint{display:none;text-align:center;color:var(--muted);font-size:13px;margin-top:12px}

/* ============ 7. 使用场景 ============ */
.scenes{padding:84px 0}
.scene-list{max-width:760px;margin:10px auto 50px}
.scene-list li{display:flex;align-items:flex-start;gap:12px;padding:10px 0;font-size:16px;color:var(--text)}
.scene-list svg{width:22px;height:22px;flex:none;margin-top:4px}
.vs-grid{display:grid;grid-template-columns:1fr 1fr;max-width:860px;margin:0 auto;position:relative;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-hover)}
.vs-card{padding:30px 30px 34px}
.vs-card.sad{background:#F7F1F5}
.vs-card.sweet{background:linear-gradient(180deg,#FFF0F6,#FFE7F0);border-left:1px dashed #E9C8D8}
.vs-card h3{display:flex;align-items:center;gap:8px;font-size:17px;font-weight:800;margin-bottom:14px}
.vs-card h3::before{content:"";width:8px;height:8px;border-radius:50%;flex:none}
.vs-card.sad h3{color:#7A6A7C}
.vs-card.sad h3::before{background:#C9B8C4}
.vs-card.sweet h3{color:var(--primary-deep)}
.vs-card.sweet h3::before{background:var(--primary)}
.vs-card li{display:flex;align-items:center;gap:8px;padding:6px 0;font-size:14px;color:var(--text)}
.vs-card li::before{content:"";width:6px;height:6px;border-radius:50%;flex:none}
.vs-card.sad li::before{background:#D8C6D0}
.vs-card.sweet li::before{background:var(--primary)}
.vs-bad{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:58px;height:58px;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:var(--shadow-hover);border:4px solid #fff;z-index:2}

/* ============ 8. 数据 ============ */
.stats{padding:84px 0;background:var(--deep)}
.stats .sec-title{color:#fff}
.stats .sec-sub{color:rgba(255,255,255,.72)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-num{font-size:46px;font-weight:800;color:#fff;line-height:1.2}
.stat-label{margin-top:8px;font-size:15px;color:rgba(255,255,255,.78)}

/* ============ 9. 人设定制 ============ */
.custom{padding:84px 0;background:var(--bg-soft)}
.custom-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.custom-img{border-radius:var(--radius);box-shadow:var(--shadow-hover);width:100%;aspect-ratio:1/1;object-fit:cover}
.custom h2{font-size:32px;font-weight:800;color:var(--deep);line-height:1.35;margin-bottom:16px}
.custom .lead{font-size:16px;color:var(--muted);margin-bottom:20px}
.chip-list{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{background:var(--card);border:1px solid var(--border);border-radius:999px;padding:8px 16px;font-size:14px;color:var(--text);box-shadow:var(--shadow)}
.custom-cta{display:flex;margin:0 auto}

/* ============ 10. 用户真实评价 ============ */
.reviews{padding:84px 0}
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rev{padding:26px 26px}
.rev-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.rev-ava{width:46px;height:46px;border-radius:50%;color:#fff;font-size:19px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:none}
.rev-name{font-weight:700;color:var(--deep);font-size:15px}
.rev-stars{color:var(--gold);font-size:14px;letter-spacing:2px}
.rev p{font-size:14px;color:var(--text)}
.rev:nth-child(1) .rev-ava{background:linear-gradient(135deg,#FF5C8A,#F03D74)}
.rev:nth-child(2) .rev-ava{background:linear-gradient(135deg,#FF9A76,#F65B6C)}
.rev:nth-child(3) .rev-ava{background:linear-gradient(135deg,#B98CFF,#7B5CE6)}
.rev:nth-child(4) .rev-ava{background:linear-gradient(135deg,#4FC3F7,#3A6FE0)}
.rev:nth-child(5) .rev-ava{background:linear-gradient(135deg,#2EC57E,#1FA967)}
.rev:nth-child(6) .rev-ava{background:linear-gradient(135deg,#FFB74D,#F08A24)}

/* ============ 11. 隐私安全 ============ */
.privacy{padding:84px 0;background:var(--bg-soft)}
.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.priv{padding:28px 26px}
.priv-icon{width:52px;height:52px;border-radius:14px;background:var(--primary-soft);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.priv-icon svg{width:26px;height:26px}
.priv h3{font-size:17px;color:var(--deep);margin-bottom:8px}
.priv p{font-size:14px;color:var(--muted)}

/* ============ 12. 版本更新 ============ */
.update{padding:84px 0}
.update-card{display:grid;grid-template-columns:320px 1fr;gap:40px;padding:40px;align-items:center}
.update-ver h3{font-size:15px;color:var(--muted);font-weight:600;margin-bottom:6px}
.update-ver .v{font-size:54px;font-weight:800;color:var(--deep);line-height:1.1}
.update-ver .d{display:inline-block;margin-top:12px;background:var(--primary-soft);color:var(--primary-deep);font-size:14px;font-weight:600;padding:6px 16px;border-radius:999px;border:1px solid var(--border)}
.update-log li{display:flex;gap:10px;align-items:flex-start;padding:8px 0;font-size:15px;color:var(--text);border-bottom:1px dashed var(--border)}
.update-log li:last-child{border-bottom:none}
.update-log svg{width:18px;height:18px;flex:none;margin-top:4px}

/* ============ 13. FAQ ============ */
.faq{padding:84px 0;background:var(--bg-soft)}
.faq-wrap{max-width:840px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:14px;overflow:hidden;transition:box-shadow .25s}
.faq-item.open{box-shadow:var(--shadow-hover)}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:14px;width:100%;background:none;border:none;padding:20px 24px;font-size:16px;font-weight:600;color:var(--deep);cursor:pointer;text-align:left;min-height:56px}
.faq-q svg{width:20px;height:20px;flex:none;transition:transform .3s}
.faq-item.open .faq-q svg{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item.open .faq-a{max-height:400px}
.faq-a p{padding:0 24px 22px;font-size:15px;color:var(--muted)}
.faq-item.open .faq-a p{border-top:1px dashed var(--border);padding-top:16px}

/* ============ 14. 下载区域 ============ */
.download{padding:92px 0;background:linear-gradient(180deg,var(--bg) 0%,#FFEAF2 100%);text-align:center}
.download h1{font-size:40px;font-weight:800;color:var(--deep);line-height:1.3}
.dl-info{margin:16px 0 30px;font-size:14px;color:var(--muted);display:flex;gap:22px;justify-content:center;flex-wrap:wrap}
.dl-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.dl-btns .btn{min-width:240px}
.dl-tip{margin-top:22px;font-size:15px;color:var(--text)}

/* ============ 15. 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}
.footer .slogan{display:block;margin-top:6px;font-size:13px;color:rgba(255,255,255,.55)}

/* ============ 16. 返回顶部 ============ */
.to-top{position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .3s,transform .3s,visibility .3s;z-index:90;box-shadow:var(--shadow-hover)}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top svg{width:20px;height:20px}

/* ============ 响应式 ============ */
@media (max-width:1100px){
  .hero h1{font-size:38px}
  .sec-title{font-size:30px}
  .persona-grid{grid-template-columns:repeat(3,1fr);max-width:420px}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .privacy-grid{grid-template-columns:repeat(2,1fr)}
  .rev-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .nav-menu{display:none}
  .nav-dl{margin-left:auto}
  .hero{padding:104px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-left{text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .hero-label{justify-content:center}
  .persona-grid{margin:0 auto}
  .hero-cta{margin-left:auto;margin-right:auto}
  .chat{margin:0 auto;max-width:100%}
  .intro-grid{grid-template-columns:1fr;gap:34px}
  .custom-grid{grid-template-columns:1fr;gap:34px}
  .vs-grid{grid-template-columns:1fr;max-width:560px}
  .vs-card.sweet{border-left:none;border-top:1px dashed #E9C8D8}
  .vs-bad{position:static;transform:none;margin:16px auto}
  .update-card{grid-template-columns:1fr;gap:26px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .nav-logo{min-height:44px}
  .nav-dl{min-height:44px;padding:0 22px}
  .sec{padding:64px 0}
  .sec-head{margin-bottom:34px}
  .steps-grid{grid-template-columns:1fr}
  .scroll-hint{display:block}
  .dl-info{font-size:12px;gap:12px;flex-wrap:nowrap;white-space:nowrap}
  .dl-btns{flex-direction:column;align-items:stretch}
  .dl-btns .btn{width:100%;min-width:0}
  .hero-cta{width:100%}
}
@media (max-width:640px){
  .hero h1{font-size:30px}
  .ver-badge{font-size:13px;padding:3px 10px;margin-left:8px}
  .sec-title{font-size:26px}
  .feat-grid{grid-template-columns:1fr}
  .rev-grid{grid-template-columns:1fr}
  .privacy-grid{grid-template-columns:1fr}
  .chat-body{height:300px}
  .stat-num{font-size:36px}
  .update-ver .v{font-size:44px}
  .download h1{font-size:30px}
  .to-top{right:16px;bottom:16px}
}