: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:68px;
  --container:1160px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:70px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
ul{list-style:none}

.wrap{max-width:var(--container);margin:0 auto;padding:0 24px}

/* 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)}

/* 通用按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border-radius:999px;font-weight:600;transition:transform .25s,box-shadow .25s;border:none;cursor:pointer}
.btn:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(240,61,116,.3)}
.btn-lg{padding:16px 42px;font-size:17px}
.btn-pink{min-height:52px}

/* ===== 1. 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;height:var(--nav-h);background:rgba(255,249,251,.92);backdrop-filter:blur(10px);border-bottom:1px solid transparent;z-index:100;transition:box-shadow .3s,border-color .3s}
.nav.scrolled{box-shadow:0 6px 24px rgba(240,61,116,.08);border-color:var(--border)}
.nav-inner{height:var(--nav-h);display:flex;align-items:center;gap:28px}
.logo{font-size:24px;font-weight:800;color:var(--deep);letter-spacing:.5px;display:flex;align-items:center;gap:6px;min-height:44px}
.logo-tag{font-size:11px;font-weight:700;color:#fff;background:linear-gradient(90deg,var(--primary),var(--primary-deep));padding:2px 7px;border-radius:8px;letter-spacing:0}
.nav-menu{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-menu a{font-size:15px;color:var(--muted);font-weight:500;transition:color .2s;padding:8px 2px}
.nav-menu a:hover{color:var(--primary-deep)}
.btn-nav{padding:9px 22px;font-size:14px;min-height:44px;flex-shrink:0}

/* ===== 2. Hero ===== */
.hero{background:linear-gradient(180deg,var(--bg-soft) 0%,var(--bg) 100%);padding:calc(var(--nav-h) + 52px) 0 64px}
.hero-top{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.hero-badge{display:inline-block;background:var(--primary-soft);color:var(--primary-deep);font-size:13px;font-weight:600;padding:7px 16px;border-radius:999px;margin-bottom:18px}
.hero h1{font-size:46px;font-weight:800;color:var(--deep);line-height:1.25;margin-bottom:18px}
.ver{display:inline-block;font-size:15px;font-weight:700;color:var(--primary-deep);background:var(--primary-soft);padding:4px 12px;border-radius:999px;vertical-align:middle;margin-left:6px}
.hero-desc{font-size:16px;color:var(--muted);margin-bottom:30px;max-width:520px}
.hero-intro .btn{margin-bottom:6px}

/* 聊天窗口 */
.chat-card{background:#fff;border:1px solid var(--border);border-radius:24px;box-shadow:0 18px 48px rgba(240,61,116,.14);overflow:hidden}
.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:46px;height:46px;border-radius:50%;border:2px solid #fff;object-fit:cover}
.chat-user{display:flex;flex-direction:column;line-height:1.4}
.chat-name{font-size:15px;font-weight:700}
.chat-status{font-size:12px;opacity:.95;display:flex;align-items:center;gap:5px}
.dot{width:7px;height:7px;border-radius:50%;background:var(--green);display:inline-block}
.chat-body{height:330px;overflow-y:auto;padding:18px;background:#FDF7FA;display:flex;flex-direction:column;gap:12px}
.msg{display:flex}
.msg p{max-width:78%;padding:11px 15px;border-radius:16px;font-size:14px;line-height:1.65}
.msg.ai{justify-content:flex-start}
.msg.ai p{background:#fff;border:1px solid var(--border);border-top-left-radius:4px}
.msg.user{justify-content:flex-end}
.msg.user p{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 14px;background:#fff;border-top:1px solid var(--border)}
.chat-input input{flex:1;border:none;outline:none;font-size:14px;color:var(--muted);background:var(--bg-soft);border-radius:999px;padding:12px 18px;min-height:44px}
.btn-send{width:44px;height:44px;border:none;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;transition:opacity .25s,transform .25s}
.btn-send:hover{transform:scale(1.06)}
.btn-send.off{background:#D9C8D8;cursor:not-allowed;transform:none}

/* 人设 */
.hero-personas{margin-top:56px}
.persona-title{font-size:18px;font-weight:700;color:var(--deep);text-align:center;margin-bottom:22px}
.persona-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.persona{text-align:center;cursor:pointer}
.persona img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:50%;border:3px solid #fff;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.persona:hover img{transform:translateY(-6px) scale(1.03);box-shadow:var(--shadow-hover)}
.persona span{display:block;margin-top:10px;font-size:13px;font-weight:600;color:var(--text)}
.persona-custom img{border-color:var(--primary);padding:3px;background:linear-gradient(90deg,var(--primary),var(--primary-deep))}

/* ===== 3. 三步上手 ===== */
.section{padding:84px 0}
.sec-head{text-align:center;max-width:640px;margin:0 auto 46px}
.sec-head h2{font-size:32px;font-weight:800;color:var(--deep);margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:15px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step-card{padding:36px 30px;text-align:center}
.step-num{font-style:normal;display:inline-flex;align-items:center;justify-content:center;width:54px;height:54px;border-radius:16px;background:var(--primary-soft);color:var(--primary-deep);font-weight:800;font-size:18px;margin-bottom:18px}
.step-card h3{font-size:19px;color:var(--deep);margin-bottom:10px}
.step-card p{color:var(--muted);font-size:14px}

/* ===== 4. 产品介绍 ===== */
.product,.custom{background:var(--bg-soft)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-media .media-img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow)}
.tag{display:inline-block;background:var(--primary-soft);color:var(--primary-deep);font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;margin-bottom:16px}
.split-text h2{font-size:30px;font-weight:800;color:var(--deep);margin-bottom:16px;line-height:1.35}
.split-text p{color:var(--muted);font-size:15px;margin-bottom:22px}
.check-list li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--text);margin-bottom:12px;font-weight:500}
.check{width:20px;height:20px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));position:relative;flex-shrink:0;margin-top:3px}
.check::after{content:"";position:absolute;left:6px;top:3px;width:6px;height:10px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}

/* ===== 5. 四大核心功能 ===== */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feat-card{padding:28px 24px}
.feat-icon{width:52px;height:52px;border-radius:14px;background:var(--primary-soft);color:var(--primary-deep);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.feat-icon svg{width:26px;height:26px}
.feat-card h3{font-size:18px;color:var(--deep);margin-bottom:8px}
.pain{font-size:14px;color:var(--primary-deep);font-weight:600;margin-bottom:8px}
.feat-card p:last-child{font-size:14px;color:var(--muted)}

/* ===== 6. 优势对比 ===== */
.compare{background:var(--bg-soft)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.cmp-table{width:100%;min-width:640px;table-layout:fixed;border-collapse:separate;border-spacing:0;background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border)}
.cmp-table th,.cmp-table td{padding:15px 18px;text-align:center;font-size:14px;border-bottom:1px solid var(--border);white-space:nowrap}
.cmp-table thead th{background:var(--deep);color:#fff;font-weight:700;font-size:15px}
.cmp-table thead th:first-child{text-align:left}
.cmp-table tbody th{text-align:left;font-weight:600;color:var(--deep);background:var(--bg)}
.cmp-table tbody tr:last-child th,.cmp-table tbody tr:last-child td{border-bottom:none}
.cmp-table .col-saylo{background:var(--primary-soft);color:var(--primary-deep);font-weight:700}
.cmp-table thead .col-saylo{background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff}
.slide-tip{display:none;text-align:center;color:var(--muted);font-size:13px;margin-top:12px}

/* ===== 7. 使用场景 ===== */
.scene-list{max-width:760px;margin:0 auto 48px}
.scene-list li{display:flex;align-items:flex-start;gap:12px;font-size:15px;color:var(--text);margin-bottom:14px}
.vs-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:900px;margin:0 auto}
.vs-card{padding:32px 30px}
.vs-card h3{font-size:19px;font-weight:800;margin-bottom:18px}
.vs-bad{background:var(--bg-soft)}
.vs-bad h3{color:var(--muted)}
.vs-bad li{color:var(--muted);font-size:14px;margin-bottom:10px;position:relative;padding-left:22px}
.vs-bad li::before{content:"✕";position:absolute;left:0;color:#D8B4C4;font-weight:700}
.vs-good{background:linear-gradient(180deg,var(--primary-soft),#fff);border-color:var(--primary)}
.vs-good h3{color:var(--primary-deep)}
.vs-good li{color:var(--text);font-size:14px;margin-bottom:10px;position:relative;padding-left:22px}
.vs-good li::before{content:"✔";position:absolute;left:0;color:var(--primary-deep);font-weight:700}

/* ===== 8. 数据模块 ===== */
.data{background:linear-gradient(135deg,var(--deep) 0%,#3B2154 100%);padding:70px 0}
.data .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{text-align:center;color:#fff;padding:20px 10px}
.stat .num{display:block;font-size:42px;font-weight:800;color:var(--primary);line-height:1.2}
.stat span{font-size:14px;color:#C9B8DA;margin-top:6px;display:block}

/* ===== 9. 人设定制 ===== */
.split-rev .split-media{order:2}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.chip{background:#fff;border:1px solid var(--border);color:var(--text);font-size:13px;font-weight:600;padding:7px 16px;border-radius:999px}

/* ===== 10. 用户评价 ===== */
.review-card{padding:26px 24px}
.rev-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.rev-ava{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.rev-name{font-size:15px;font-weight:700;color:var(--deep)}
.stars{color:#FFB74D;font-size:13px;letter-spacing:2px}
.rev-text{font-size:14px;color:var(--muted)}

/* ===== 11. 隐私安全 ===== */
.privacy{background:var(--bg-soft)}
.priv-card{padding:28px 24px}
.priv-icon{width:52px;height:52px;border-radius:14px;background:var(--primary-soft);color:var(--primary-deep);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.priv-icon svg{width:26px;height:26px}
.priv-card h3{font-size:18px;color:var(--deep);margin-bottom:10px}
.priv-card p{font-size:14px;color:var(--muted)}

/* ===== 12. 版本更新 ===== */
.update-card{max-width:760px;margin:0 auto;padding:32px 34px}
.upd-head{padding-bottom:16px;border-bottom:1px solid var(--border);margin-bottom:18px}
.upd-head h3{font-size:21px;color:var(--deep);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.upd-time{display:block;font-size:13px;color:var(--muted);margin-top:6px}
.upd-list li{display:flex;align-items:flex-start;gap:10px;background:var(--bg-soft);border-radius:12px;padding:12px 14px;font-size:14px;color:var(--text);margin-bottom:10px;line-height:1.65}
.upd-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);flex-shrink:0;margin-top:8px}

/* ===== 13. FAQ ===== */
.faq-list{max-width:760px;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:hover{box-shadow:var(--shadow-hover)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:19px 22px;background:none;border:none;cursor:pointer;font-size:15px;font-weight:600;color:var(--deep);text-align:left;min-height:56px}
.faq-arrow{width:9px;height:9px;border-right:2px solid var(--primary-deep);border-bottom:2px solid var(--primary-deep);transform:rotate(45deg);transition:transform .3s;flex-shrink:0;margin-top:-4px}
.faq-item.open .faq-arrow{transform:rotate(-135deg);margin-top:4px}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 22px 20px;font-size:14px;color:var(--muted)}

/* ===== 14. 下载区域 ===== */
.download{background:linear-gradient(180deg,var(--bg-soft),var(--bg))}
.dl-title{font-size:38px;font-weight:800;color:var(--deep);text-align:center;margin-bottom:10px}
.dl-meta{text-align:center;color:var(--muted);font-size:14px;margin-bottom:30px}
.dl-btns{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
.dl-tip{text-align:center;color:var(--muted);font-size:14px;margin-top:22px}

/* ===== 15. 页脚 ===== */
.footer{background:var(--deep);padding:30px 0;text-align:center}
.footer p{color:#C9B8DA;font-size:14px}
.site-link{color:#fff;text-decoration:none;font-weight:600}
.site-link:hover{color:var(--primary)}

/* ===== 16. 返回顶部 ===== */
.back-top{position:fixed;right:26px;bottom:34px;width:48px;height:48px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 26px rgba(240,61,116,.32);opacity:0;visibility:hidden;transform:translateY(14px);transition:opacity .3s,visibility .3s,transform .3s;z-index:99}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{transform:translateY(-4px)}

/* ===== 响应式 ===== */
@media (max-width:1100px){
  .hero h1{font-size:38px}
  .hero-top{grid-template-columns:1fr;gap:40px}
  .hero-desc{max-width:none}
  .persona-grid{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .data .wrap{grid-template-columns:repeat(2,1fr)}
  .sec-head h2{font-size:28px}
  .split{grid-template-columns:1fr;gap:36px}
  .split-rev .split-media{order:0}
}

@media (max-width:900px){
  .nav-menu{display:none}
  .nav-inner{justify-content:space-between}
  .hero{padding-top:calc(var(--nav-h) + 36px)}
  .hero h1{font-size:32px}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .step-grid{grid-template-columns:1fr;max-width:520px;margin:0 auto}
  .vs-grid{grid-template-columns:1fr}
  .split-text h2{font-size:26px}
}

@media (max-width:768px){
  .wrap{padding:0 20px}
  .section{padding:64px 0}
  .hero{padding-top:calc(var(--nav-h) + 28px);padding-bottom:48px}
  .hero h1{font-size:28px}
  .hero-desc{font-size:15px}
  .hero-intro .btn{width:100%}
  .split-text .btn{width:100%}
  .slide-tip{display:block}
  .dl-btns{flex-direction:column;align-items:stretch;max-width:360px;margin:0 auto}
  .btn-lg{padding:15px 20px;font-size:16px}
  .dl-meta{font-size:12px;white-space:nowrap}
  .dl-title{font-size:28px}
  .update-card{padding:24px 22px}
  .sec-head h2{font-size:25px}
}

@media (max-width:640px){
  .grid-4{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr;max-width:none}
  .chat-body{height:250px}
  .persona-grid{grid-template-columns:repeat(3,1fr);gap:12px}
  .data .wrap{gap:8px}
  .stat .num{font-size:34px}
  .back-top{right:16px;bottom:20px;width:44px;height:44px}
  .rev-ava{width:40px;height:40px}
}