/* ========== Saylo 官网样式 ========== */
: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;
  --radius:18px;
  --shadow:0 10px 30px rgba(240,61,116,.08);
  --shadow-hover:0 18px 42px rgba(240,61,116,.16);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",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;border:none;cursor:pointer;background:none;color:inherit}
input{font-family:inherit}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:86px 0}
.sec-tag{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;padding:5px 14px}
.sec-title{font-size:34px;font-weight:800;color:var(--deep);line-height:1.3;margin:14px 0 12px}
.sec-sub{font-size:16px;color:var(--muted);max-width:640px;margin:0 auto}
.sec-head{text-align:center;margin-bottom:52px}

/* 通用卡片与按钮 */
.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;font-size:16px;font-weight:600;padding:14px 34px;box-shadow:0 8px 20px rgba(240,61,116,.28);transition:transform .25s,box-shadow .25s}
.btn:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(240,61,116,.38)}

/* ========== 导航 ========== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,249,251,.92);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:1180px;margin:0 auto;height:64px;display:flex;align-items:center;gap:28px;padding:0 24px}
.logo{display:inline-flex;align-items:center;gap:8px;font-size:24px;font-weight:800;letter-spacing:.5px}
.logo .logo-heart{color:var(--primary)}
.logo em{font-style:normal;background:linear-gradient(90deg,var(--primary),var(--primary-deep));-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;gap:26px;flex:1;justify-content:center}
.nav-links a{font-size:15px;font-weight:500;color:var(--text);transition:color .2s}
.nav-links a:hover{color:var(--primary-deep)}
.nav-btn{padding:8px 18px;font-size:14px;font-weight:600;color:#fff;background:linear-gradient(90deg,var(--primary),var(--primary-deep));border-radius:999px;box-shadow:0 6px 16px rgba(240,61,116,.26);transition:transform .2s,box-shadow .2s;white-space:nowrap}
.nav-btn:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(240,61,116,.34)}

/* ========== Hero ========== */
.hero{background:linear-gradient(180deg,var(--bg-soft) 0%,var(--bg) 100%);padding:132px 0 76px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:46px;font-weight:800;color:var(--deep);line-height:1.22}
.hero h1 .ver{font-size:20px;font-weight:700;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;padding:4px 14px;margin-left:10px;vertical-align:middle}
.hero-intro{font-size:16.5px;color:var(--muted);margin:20px 0 30px;max-width:520px}
.hero-cta{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.hero-note{font-size:13px;color:var(--muted)}

/* 聊天窗口 */
.chat{background:var(--card);border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow-hover);overflow:hidden;display:flex;flex-direction:column;height:480px}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 18px;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff}
.chat-head img{width:46px;height:46px;border-radius:50%;border:2px solid rgba(255,255,255,.85);object-fit:cover}
.chat-user{line-height:1.35}
.chat-user b{display:block;font-size:16px;font-weight:700}
.chat-status{display:flex;align-items:center;gap:5px;font-size:12.5px;opacity:.92}
.chat-status i{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(46,197,126,.25)}
.chat-body{flex:1;overflow-y:auto;background:#FDF6FA;padding:18px 16px;display:flex;flex-direction:column;gap:12px}
.msg{display:flex;gap:8px;max-width:86%;animation:msgIn .3s ease}
.msg .ava{width:30px;height:30px;border-radius:50%;object-fit:cover;flex-shrink:0}
.msg .bubble{border-radius:14px;padding:10px 14px;font-size:14.5px;line-height:1.65;box-shadow:0 3px 10px rgba(240,61,116,.06)}
.msg.ai{align-self:flex-start}
.msg.ai .bubble{background:var(--card);border:1px solid var(--border);border-top-left-radius:4px}
.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-top-right-radius:4px}
.chat-input{display:flex;align-items:center;gap:10px;padding:12px 14px;background:var(--card);border-top:1px solid var(--border)}
.chat-input input{flex:1;border:1px solid var(--border);background:var(--bg);border-radius:999px;padding:11px 16px;font-size:13.5px;color:var(--muted);outline:none;cursor:default}
.chat-send{width:42px;height:42px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 6px 14px rgba(240,61,116,.3);transition:transform .2s,box-shadow .2s}
.chat-send:hover{transform:translateY(-2px);box-shadow:0 10px 20px rgba(240,61,116,.38)}
.chat-send.disabled{background:#E6DFE9;color:#B9B0C0;box-shadow:none;cursor:not-allowed;transform:none}
@keyframes msgIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* 人设 */
.personas{margin-top:66px}
.personas .p-title{display:flex;align-items:center;justify-content:center;gap:8px;font-size:18px;font-weight:700;color:var(--deep);margin-bottom:22px}
.personas .p-title i{width:8px;height:8px;border-radius:50%;background:var(--primary)}
.persona-list{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.persona{padding:14px 10px 16px;text-align:center;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.persona:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.persona img{width:100%;aspect-ratio:1/1;border-radius:50%;object-fit:cover;border:3px solid var(--primary-soft)}
.persona span{display:block;margin-top:10px;font-size:14px;font-weight:600;color:var(--text)}
.persona b{display:block;font-size:12px;font-weight:500;color:var(--muted);margin-top:2px}

/* ========== 三步上手 ========== */
.steps{background:var(--bg)}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{padding:30px 26px;position:relative}
.step .num{font-size:34px;font-weight:800;background:linear-gradient(90deg,var(--primary),var(--primary-deep));-webkit-background-clip:text;background-clip:text;color:transparent}
.step h3{font-size:20px;font-weight:700;color:var(--deep);margin:12px 0 8px}
.step p{font-size:14.5px;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-copy p{font-size:15.5px;color:var(--muted);margin-bottom:16px}
.intro-list{margin-top:8px}
.intro-list li{display:flex;align-items:flex-start;gap:10px;font-size:15px;font-weight:600;color:var(--deep);margin-bottom:12px}
.intro-list .ck{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;display:flex;align-items:center;justify-content:center;margin-top:2px}
.intro-img{border-radius:24px;overflow:hidden;box-shadow:var(--shadow-hover)}
.intro-img img{width:100%;height:auto}

/* ========== 四大核心功能 ========== */
.features{background:var(--bg)}
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feat{padding:28px 24px}
.feat .ico{width:52px;height:52px;border-radius:16px;background:var(--primary-soft);display:flex;align-items:center;justify-content:center;color:var(--primary-deep);margin-bottom:16px}
.feat h3{font-size:18px;font-weight:700;color:var(--deep);margin-bottom:6px}
.feat .pain{font-size:12.5px;font-weight:600;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;padding:3px 10px;display:inline-block;margin-bottom:10px}
.feat p{font-size:14px;color:var(--muted)}

/* ========== 优势对比 ========== */
.compare{background:var(--bg-soft)}
.table-scroll{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow);background:var(--card);border:1px solid var(--border)}
.compare-table{width:100%;border-collapse:collapse;text-align:center;font-size:14.5px}
.compare-table th,.compare-table td{padding:16px 14px;white-space:nowrap}
.compare-table thead th{background:var(--deep);color:#fff;font-weight:600}
.compare-table tbody td{border-top:1px solid var(--border);color:var(--text)}
.compare-table tbody tr:first-child td{border-top:none}
.compare-table .dim{font-weight:600;color:var(--deep);text-align:left}
.compare-table .hl{background:var(--primary-deep);color:#fff;font-weight:600}
.table-hint{display:none;text-align:center;font-size:12.5px;color:var(--muted);margin-top:12px}

/* ========== 使用场景 ========== */
.scenes{background:var(--bg)}
.scene-title{font-size:34px;font-weight:800;color:var(--deep);text-align:center;line-height:1.35;margin-bottom:14px}
.scene-sub{text-align:center;color:var(--muted);font-size:16px;margin-bottom:48px}
.scene-list{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:880px;margin:0 auto 56px}
.scene-list li{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:15px 18px;font-size:15px;color:var(--text);box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.scene-list li:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.scene-list .ck{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;display:flex;align-items:center;justify-content:center}
.vs-wrap{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:stretch;max-width:960px;margin:0 auto}
.vs-card{padding:30px 28px;display:flex;flex-direction:column;gap:12px}
.vs-card .vs-tag{font-size:12px;font-weight:700;letter-spacing:1px;border-radius:999px;padding:4px 12px;align-self:flex-start}
.vs-solo{background:var(--card);border:1px solid var(--border)}
.vs-solo .vs-tag{background:#F1ECF4;color:#7A6F85}
.vs-solo h4{font-size:18px;font-weight:700;color:var(--deep)}
.vs-solo li{display:flex;gap:8px;font-size:14px;color:var(--muted)}
.vs-solo li::before{content:"";flex-shrink:0;width:6px;height:6px;border-radius:50%;background:#D8CFDE;margin-top:9px}
.vs-love{background:linear-gradient(150deg,var(--primary),var(--primary-deep));border:none;box-shadow:0 18px 40px rgba(240,61,116,.30)}
.vs-love .vs-tag{background:rgba(255,255,255,.22);color:#fff}
.vs-love h4{color:#fff;font-size:18px;font-weight:700}
.vs-love li{display:flex;gap:8px;font-size:14px;color:rgba(255,255,255,.94)}
.vs-love li::before{content:"";flex-shrink:0;width:6px;height:6px;border-radius:50%;background:#fff;margin-top:9px}
.vs-badge{width:56px;height:56px;border-radius:50%;background:var(--deep);color:#fff;font-size:16px;font-weight:800;display:flex;align-items:center;justify-content:center;align-self:center;box-shadow:0 10px 24px rgba(42,26,61,.28);flex-shrink:0}

/* ========== 数据 ========== */
.stats{background:linear-gradient(135deg,#2A1A3D 0%,#462A63 100%);color:#fff}
.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}
.stat{text-align:center;padding:34px 20px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);transition:transform .25s}
.stat:hover{transform:translateY(-6px)}
.stat .num{font-size:40px;font-weight:800;background:linear-gradient(90deg,#FF8FB0,#FF5C8A);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.15}
.stat p{margin-top:8px;font-size:14px;color:rgba(255,255,255,.82)}

/* ========== 人设定制 ========== */
.customize{background:var(--bg-soft)}
.cus-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.cus-copy h3{font-size:34px;font-weight:800;color:var(--deep);line-height:1.3;margin-bottom:14px}
.cus-copy p{font-size:15.5px;color:var(--muted);margin-bottom:22px}
.cus-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.cus-tags span{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:600;color:var(--primary-deep);background:var(--card);border:1px solid var(--border);border-radius:999px;padding:7px 14px;box-shadow:var(--shadow)}
.cus-img{border-radius:24px;overflow:hidden;box-shadow:var(--shadow-hover)}
.cus-img img{width:100%;height:auto}

/* ========== 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:46px;height:46px;border-radius:50%;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;flex-shrink:0}
.rev-meta{line-height:1.3}
.rev-meta b{display:block;font-size:15px;color:var(--deep)}
.rev-stars{color:#FFB400;font-size:14px;letter-spacing:2px}
.rev p{font-size:14px;color:var(--muted)}

/* ========== 隐私安全 ========== */
.privacy{background:var(--bg-soft)}
.pri-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.pri{padding:28px 24px;text-align:center}
.pri .ico{width:54px;height:54px;border-radius:50%;background:var(--primary-soft);color:var(--primary-deep);display:flex;align-items:center;justify-content:center;margin:0 auto 14px}
.pri h3{font-size:17px;font-weight:700;color:var(--deep);margin-bottom:8px}
.pri p{font-size:13.5px;color:var(--muted)}

/* ========== 版本更新 ========== */
.updates{background:var(--bg)}
.update-card{max-width:760px;margin:0 auto;padding:34px 34px}
.update-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-bottom:18px;border-bottom:1px solid var(--border);margin-bottom:18px}
.update-head h3{font-size:24px;font-weight:800;color:var(--deep)}
.update-head .ver-chip{font-size:14px;font-weight:700;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;padding:6px 14px}
.update-time{font-size:13px;color:var(--muted)}
.update-list li{display:flex;align-items:flex-start;gap:10px;font-size:14.5px;color:var(--text);padding:9px 0}
.update-list li::before{content:"";flex-shrink:0;width:8px;height:8px;border-radius:50%;background:var(--primary);margin-top:8px}

/* ========== FAQ ========== */
.faq{background:var(--bg-soft)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:14px;margin-bottom:14px;box-shadow:var(--shadow);transition:box-shadow .25s}
.faq-item.open{box-shadow:var(--shadow-hover)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 22px;text-align:left;font-size:15.5px;font-weight:600;color:var(--deep)}
.faq-icon{flex-shrink:0;width:28px;height:28px;border-radius:50%;background:var(--primary-soft);color:var(--primary-deep);font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;transition:transform .3s}
.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 22px 18px;font-size:14.5px;color:var(--muted)}

/* ========== 下载区域 ========== */
.download{background:linear-gradient(160deg,#2A1A3D 0%,#4A2C6B 100%);color:#fff;text-align:center}
.download h1{font-size:38px;font-weight:800;color:#fff}
.download h1 .ver{font-size:18px;font-weight:700;color:#FF9FBC;background:rgba(255,255,255,.14);border-radius:999px;padding:4px 14px;margin-left:10px;vertical-align:middle}
.dl-meta{font-size:13.5px;color:rgba(255,255,255,.78);margin:14px 0 34px;display:flex;justify-content:center;gap:18px;flex-wrap:wrap}
.dl-btns{display:flex;justify-content:center;gap:20px;margin-bottom:18px}
.dl-btns .btn{font-size:16px;padding:15px 36px}
.dl-tip{font-size:14px;color:rgba(255,255,255,.8)}

/* ========== 页脚 ========== */
.footer{background:var(--deep);color:rgba(255,255,255,.75);padding:34px 0;text-align:center;font-size:13.5px}
.footer a{color:#fff;font-weight:600}
.footer .sep{margin:0 10px;color:rgba(255,255,255,.35)}

/* ========== 返回顶部 ========== */
.top-btn{position:fixed;right:26px;bottom:30px;width:46px;height:46px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(240,61,116,.34);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,transform .3s,visibility .3s;z-index:99}
.top-btn.show{opacity:1;visibility:visible;transform:translateY(0)}
.top-btn:hover{transform:translateY(-4px)}

/* ========== 响应式 ========== */
@media (max-width:1100px){
  .section{padding:70px 0}
  .hero{padding:118px 0 60px}
  .hero h1{font-size:38px}
  .hero-grid{gap:40px}
  .persona-list{grid-template-columns:repeat(3,1fr)}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .pri-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .rev-grid{grid-template-columns:repeat(2,1fr)}
  .sec-title{font-size:28px}
  .scene-title{font-size:28px}
}
@media (max-width:900px){
  .nav-links{display:none}
  .nav-btn{margin-left:auto}
  .hero{padding:104px 0 54px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{text-align:center}
  .hero-intro{margin-left:auto;margin-right:auto;text-align:center}
  .hero-cta{justify-content:center}
  .chat{max-width:520px;margin:0 auto;width:100%}
  .personas{margin-top:54px}
  .intro-grid{grid-template-columns:1fr;gap:36px}
  .intro-copy{text-align:center}
  .intro-list{text-align:left;max-width:440px;margin:0 auto}
  .cus-grid{grid-template-columns:1fr;gap:36px}
  .cus-copy{text-align:center}
  .cus-tags{justify-content:center}
  .vs-wrap{grid-template-columns:1fr}
  .vs-badge{margin:0 auto}
  .scene-list{grid-template-columns:1fr}
}
@media (max-width:768px){
  .wrap{padding:0 20px}
  .section{padding:56px 0}
  .hero{padding:92px 0 46px}
  .hero h1{font-size:30px}
  .hero-intro{font-size:15px}
  .hero-cta .btn{width:100%;max-width:none}
  .chat{height:440px}
  .chat-input input{font-size:16px}
  .sec-head{margin-bottom:38px}
  .compare-table{min-width:640px}
  .table-hint{display:block}
  .dl-btns{flex-direction:column;gap:14px}
  .dl-btns .btn{width:100%;max-width:420px;margin:0 auto}
  .dl-meta{font-size:12.5px;white-space:nowrap;flex-wrap:nowrap;overflow:hidden}
  .update-head{flex-direction:column;align-items:flex-start}
  .download h1{font-size:30px}
  .top-btn{right:16px;bottom:20px;width:44px;height:44px}
}
@media (max-width:640px){
  .feat-grid{grid-template-columns:1fr}
  .rev-grid{grid-template-columns:1fr}
  .pri-grid{grid-template-columns:1fr}
  .persona-list{grid-template-columns:repeat(3,1fr);gap:12px}
  .persona{padding:10px 6px 12px}
  .persona span{font-size:12px;margin-top:7px}
  .persona b{font-size:11px}
  .chat{height:390px}
  .stat .num{font-size:32px}
  .scene-title{font-size:24px}
  .sec-title{font-size:24px}
}