/* ===== 夜色ai 官网样式 ===== */
:root{
  --primary:#FF5C8A;
  --primary-deep:#E93E74;
  --violet:#8B5CF6;
  --bg:#FFFFFF;
  --bg-soft:#F9F7FE;
  --border:#ECE7F6;
  --text:#1B1530;
  --text-2:#5F5875;
  --radius:16px;
  --radius-lg:22px;
  --shadow:0 8px 24px rgba(124,90,255,.08);
  --shadow-lg:0 18px 44px rgba(124,90,255,.16);
  --grad:linear-gradient(135deg,var(--primary),var(--violet));
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:78px;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit}

.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.wrap-narrow{max-width:860px}
.section{padding:92px 0}
.section-soft{background:var(--bg-soft)}

.sec-head{text-align:center;margin-bottom:54px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;color:var(--primary);
  background:rgba(255,92,138,.08);border:1px solid rgba(255,92,138,.18);
  padding:5px 16px;border-radius:999px;margin-bottom:16px;letter-spacing:1px;
}
.sec-head h2{font-size:clamp(26px,3vw,36px);line-height:1.3;font-weight:800}
.sec-sub{color:var(--text-2);margin-top:12px;font-size:15px}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:none;cursor:pointer;font-weight:600;border-radius:999px;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,color .25s ease,border-color .25s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(255,92,138,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,92,138,.42)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.1);transform:translateY(-2px)}
.btn-lg{padding:16px 42px;font-size:17px}
.btn-sm{height:32px;padding:0 16px;font-size:13px}

/* ===== 顶部导航 ===== */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.92);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;transition:box-shadow .3s ease,border-color .3s ease;
}
.header.scrolled{box-shadow:0 6px 24px rgba(27,21,48,.08);border-bottom-color:var(--border)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:inline-flex;align-items:center;gap:8px;font-size:19px;font-weight:800;color:var(--text)}
.logo-ico{width:24px;height:24px;color:var(--primary);flex:none}
.nav{display:flex;align-items:center;gap:28px}
.nav a{font-size:15px;color:var(--text-2);transition:color .25s ease}
.nav a:hover{color:var(--primary)}

/* ===== Hero ===== */
.hero{
  position:relative;color:#fff;overflow:hidden;padding:120px 0 84px;
  background:
    radial-gradient(760px 420px at 12% 8%,rgba(255,92,138,.22),transparent 62%),
    radial-gradient(720px 460px at 88% 92%,rgba(139,92,246,.26),transparent 60%),
    linear-gradient(160deg,#171232 0%,#1C1440 55%,#211650 100%);
}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(32px,4.2vw,50px);line-height:1.25;font-weight:800}
.ver{
  display:inline-block;vertical-align:middle;margin-left:12px;
  font-size:.45em;font-weight:700;letter-spacing:.5px;
  padding:4px 14px;border-radius:999px;
  border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.1);
}
.hero-desc{margin-top:20px;font-size:17px;line-height:1.9;color:rgba(255,255,255,.78);max-width:560px}
.persona-row{margin-top:30px}
.persona-label{font-size:14px;color:rgba(255,255,255,.65);margin-bottom:14px}
.persona-list{display:flex;gap:16px;flex-wrap:wrap}
.persona{display:flex;flex-direction:column;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.9);transition:transform .25s ease}
.persona img{
  width:72px;height:72px;border-radius:50%;object-fit:cover;
  border:2px solid rgba(255,255,255,.22);transition:border-color .25s ease;
}
.persona:hover{transform:translateY(-4px)}
.persona:hover img{border-color:var(--primary)}
.hero-btn{margin-top:34px}

/* ===== 聊天窗口 ===== */
.chat{
  background:#fff;border:1px solid rgba(255,255,255,.25);
  border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:0 30px 70px rgba(0,0,0,.5),0 0 0 1px rgba(255,255,255,.06);
}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 16px;background:#fff;border-bottom:1px solid var(--border)}
.chat-head img{width:40px;height:40px;border-radius:50%;object-fit:cover;border:2px solid #fff;box-shadow:0 2px 8px rgba(27,21,48,.16)}
.chat-name{font-size:15px;font-weight:700;color:var(--text);line-height:1.3}
.chat-status{font-size:12px;color:var(--primary);line-height:1.4}
.chat-more{width:22px;height:22px;color:var(--text-2);margin-left:auto;flex:none}
.chat-body{display:flex;flex-direction:column;gap:14px;padding:16px;background:linear-gradient(180deg,#FCFAFF,#F3EFFC)}
.chat-date{text-align:center;font-size:12px;color:#A79FBE}
.msg{display:flex;gap:10px;align-items:flex-end}
.msg.right{justify-content:flex-end}
.msg-ava{width:34px;height:34px;border-radius:50%;object-fit:cover;flex:none;box-shadow:0 2px 6px rgba(27,21,48,.14)}
.bubble{
  background:#fff;border:1px solid var(--border);color:var(--text);
  border-radius:4px 14px 14px 14px;box-shadow:0 2px 8px rgba(27,21,48,.06);
  padding:10px 14px;font-size:14px;line-height:1.6;max-width:80%;
}
.bubble.own{background:var(--grad);border-color:transparent;border-radius:14px 4px 14px 14px;color:#fff;box-shadow:0 6px 16px rgba(255,92,138,.28)}
.msg-time{display:block;font-size:11px;color:#A79FBE;margin-top:4px}
.typing{display:flex;align-items:center;gap:6px;padding:14px}
.typing i{width:7px;height:7px;border-radius:50%;background:var(--violet);opacity:.55;animation:tp 1.2s infinite ease-in-out}
.typing i:nth-child(2){animation-delay:.18s}
.typing i:nth-child(3){animation-delay:.36s}
@keyframes tp{0%,60%,100%{transform:translateY(0);opacity:.5}30%{transform:translateY(-5px);opacity:1}}
.chat-input{
  display:flex;align-items:center;gap:10px;padding:12px 16px;
  background:#fff;border-top:1px solid var(--border);
}
.chat-input .ico{width:22px;height:22px;color:#A79FBE;flex:none;display:flex}
.chat-input .ico svg{width:22px;height:22px}
.chat-field{
  flex:1;background:#F3EFFC;border-radius:999px;padding:9px 16px;
  font-size:13px;color:#A79FBE;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.chat-send{
  width:34px;height:34px;border-radius:50%;flex:none;
  background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 10px rgba(255,92,138,.3);
}
.chat-send svg{width:16px;height:16px}

/* ===== 卡片 ===== */
.card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:30px;
  transition:transform .3s ease,box-shadow .3s ease;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}

/* ===== 三步上手 ===== */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step-num{
  font-size:40px;font-weight:800;line-height:1;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.step h3{font-size:20px;margin:16px 0 10px}
.step p{color:var(--text-2);font-size:15px}

/* ===== 产品介绍 / 人设定制 ===== */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split-copy h2{font-size:clamp(26px,3vw,34px);line-height:1.35;margin-bottom:20px}
.split-copy p{color:var(--text-2);margin-bottom:14px}
.split-media img{
  width:100%;height:auto;border-radius:var(--radius-lg);border:1px solid var(--border);
  box-shadow:var(--shadow);
}
.point-list{margin-top:16px}
.point-list li{
  position:relative;padding-left:30px;margin-bottom:12px;font-size:15px;color:var(--text-2);
}
.point-list li::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:18px;height:18px;border-radius:50%;background:var(--grad);
}
.point-list li::after{
  content:"";position:absolute;left:4px;top:50%;width:9px;height:5px;
  border-left:2px solid #fff;border-bottom:2px solid #fff;
  transform:translateY(-60%) rotate(-45deg);
}

/* ===== 核心功能 ===== */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feat-ico{
  width:54px;height:54px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  background:color-mix(in srgb,var(--ic) 12%,#fff);color:var(--ic);
}
.feat-ico svg{width:26px;height:26px}
.feat h3{font-size:19px;margin:16px 0 8px}
.feat-pain{
  font-size:13px;line-height:1.6;color:var(--primary-deep);
  background:rgba(255,92,138,.07);border-radius:10px;padding:10px 12px;margin-bottom:10px;
}
.feat p{color:var(--text-2);font-size:14px;line-height:1.75}

/* ===== 用户评价 ===== */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{padding:24px}
.review-top{display:flex;align-items:center;gap:12px}
.review-ava{
  width:46px;height:46px;border-radius:50%;flex:none;
  display:flex;align-items:center;justify-content:center;
  background:var(--grad);color:#fff;font-size:18px;font-weight:700;
  box-shadow:0 6px 14px rgba(255,92,138,.28);
}
.review-name{font-size:15px;font-weight:600;line-height:1.4}
.review-star{color:#FFAB2E;font-size:14px;letter-spacing:2px;line-height:1.4}
.review-txt{margin-top:14px;color:var(--text-2);font-size:14.5px;line-height:1.8}

/* ===== 优势对比 ===== */
.table-scroll{overflow-x:auto}
.compare{
  width:100%;border-collapse:separate;border-spacing:0;table-layout:fixed;
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;
}
.compare th,.compare td{padding:17px 16px;text-align:left;font-size:14.5px;line-height:1.6}
.compare thead th{
  background:linear-gradient(160deg,#171232,#1E1740);color:#fff;font-weight:700;font-size:15px;
}
.compare thead th:nth-child(2){background:var(--grad)}
.compare tbody td{border-top:1px solid var(--border);color:var(--text-2);vertical-align:top}
.compare tbody tr:nth-child(even) td{background:var(--bg-soft)}
.compare tbody td:first-child{font-weight:700;color:var(--text)}
.compare tbody td:nth-child(2){font-weight:600;color:var(--text);background:rgba(255,92,138,.05)}
.compare tbody tr:hover td{background:rgba(139,92,246,.06)}

/* ===== 使用场景 ===== */
.scene-list{max-width:740px;margin:0 auto}
.scene-list li{
  position:relative;background:var(--bg);border:1px solid var(--border);border-radius:14px;
  padding:15px 20px 15px 48px;margin-bottom:12px;font-size:16px;
}
.scene-list li::before{
  content:"";position:absolute;left:18px;top:50%;transform:translateY(-50%);
  width:20px;height:20px;border-radius:50%;background:var(--grad);
}
.scene-list li::after{
  content:"";position:absolute;left:22px;top:50%;width:9px;height:5px;
  border-left:2px solid #fff;border-bottom:2px solid #fff;
  transform:translateY(-60%) rotate(-45deg);
}
.vs{display:grid;grid-template-columns:1fr 60px 1fr;gap:20px;align-items:center;margin-top:48px}
.vs-card{text-align:center;padding:34px 26px}
.vs-card h3{font-size:18px;margin-bottom:14px}
.vs-card p{font-size:14.5px;color:var(--text-2);margin-bottom:8px}
.vs-alone{border-color:rgba(255,92,138,.32)}
.vs-alone h3{color:var(--primary-deep)}
.vs-with{
  background:linear-gradient(160deg,rgba(255,92,138,.06),rgba(139,92,246,.08));
  border-color:rgba(139,92,246,.36);
}
.vs-with h3{color:var(--violet)}
.vs-arrow{color:var(--primary);display:flex;justify-content:center}
.vs-arrow svg{width:34px;height:34px}

/* ===== 数据模块 ===== */
.stats{
  color:#fff;
  background:
    radial-gradient(700px 400px at 20% 0%,rgba(255,92,138,.18),transparent 60%),
    radial-gradient(700px 420px at 85% 100%,rgba(139,92,246,.22),transparent 60%),
    linear-gradient(160deg,#171232 0%,#1E1740 100%);
}
.stats .eyebrow{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.16);color:#fff}
.stats .sec-sub{color:rgba(255,255,255,.6)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{
  text-align:center;padding:36px 20px;border-radius:var(--radius-lg);
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);
  transition:transform .3s ease,box-shadow .3s ease,background .3s ease;
}
.stat:hover{transform:translateY(-6px);background:rgba(255,255,255,.09);box-shadow:0 18px 44px rgba(0,0,0,.3)}
.stat-num{font-size:clamp(34px,4vw,48px);font-weight:800;line-height:1.15;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-num span{font-size:.5em;font-weight:700}
.stat-label{margin-top:8px;font-size:14px;color:rgba(255,255,255,.7)}

/* ===== 隐私安全 ===== */
.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.privacy-ico{width:46px;height:46px;color:var(--primary)}
.privacy h3{font-size:18px;margin:14px 0 8px}
.privacy p{color:var(--text-2);font-size:14.5px}

/* ===== 版本更新 ===== */
.update{max-width:760px;margin:0 auto;padding:34px 38px}
.update li{
  position:relative;padding:13px 0 13px 30px;font-size:15.5px;color:var(--text-2);
  border-bottom:1px dashed var(--border);
}
.update li:last-child{border-bottom:none}
.update li::before{
  content:"";position:absolute;left:4px;top:50%;transform:translateY(-50%);
  width:9px;height:9px;border-radius:50%;background:var(--grad);
}

/* ===== FAQ ===== */
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;transition:box-shadow .3s ease,border-color .3s ease;
}
.faq-item.open{border-color:rgba(139,92,246,.4);box-shadow:var(--shadow)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;
  background:none;border:none;cursor:pointer;text-align:left;
  padding:19px 24px;font-size:16px;font-weight:600;color:var(--text);
}
.faq-arrow{
  flex:none;width:10px;height:10px;border-right:2px solid var(--text-2);border-bottom:2px solid var(--text-2);
  transform:rotate(45deg);transition:transform .3s ease,border-color .3s ease;margin-top:-5px;
}
.faq-item.open .faq-arrow{transform:rotate(-135deg);border-color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a>div{padding:0 24px 20px;color:var(--text-2);font-size:15px}

/* ===== 下载区域 ===== */
.download{
  color:#fff;text-align:center;padding:100px 0;
  background:
    radial-gradient(760px 400px at 50% -10%,rgba(255,92,138,.22),transparent 60%),
    radial-gradient(720px 420px at 15% 110%,rgba(139,92,246,.24),transparent 60%),
    linear-gradient(160deg,#14102E 0%,#1B1440 60%,#201650 100%);
}
.download-title{font-size:clamp(30px,4vw,46px);font-weight:800;line-height:1.3}
.download-meta{color:rgba(255,255,255,.62);font-size:14px;margin:18px 0 32px;letter-spacing:.5px}
.download-btns{display:flex;justify-content:center;gap:20px}
.download-tip{margin-top:24px;color:rgba(255,255,255,.72);font-size:15px}

/* ===== 页脚 ===== */
.footer{background:#0D0920;color:rgba(255,255,255,.6);padding:38px 0}
.footer-in{display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center}
.logo-light{color:#fff}
.copyright{font-size:14px}
.copyright-link{color:var(--primary)}

/* ===== 返回顶部 ===== */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:90;
  width:46px;height:46px;border-radius:50%;border:1px solid var(--border);
  background:var(--bg);color:var(--text-2);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s,color .25s ease;
}
.to-top svg{width:20px;height:20px}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--primary);transform:translateY(-3px)}

/* ===== 滚动显现 ===== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .card,.stat{transition:none}
}

/* ===== 平板 ===== */
@media (max-width:1024px){
  .nav{gap:18px}
  .nav a{font-size:14px}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .privacy-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:900px){
  .hero{padding:104px 0 64px}
  .hero-in{grid-template-columns:1fr;gap:44px}
  .hero-desc{max-width:100%}
  .chat{max-width:520px;margin:0 auto;width:100%}
  .split{grid-template-columns:1fr;gap:36px}
  .split-media{order:2}
  .split-rev .split-media{order:2}
  .vs{grid-template-columns:1fr 52px 1fr}
}
/* ===== 手机 ===== */
@media (max-width:640px){
  .wrap{padding:0 20px}
  .section{padding:64px 0}
  .sec-head{margin-bottom:38px}
  .nav{display:none}
  .header-in{height:60px}
  .hero{padding:92px 0 52px}
  .hero h1{font-size:30px}
  .hero-desc{font-size:15.5px}
  .persona-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px 12px}
  .persona img{width:64px;height:64px}
  .hero-btn{width:100%}
  .steps{grid-template-columns:1fr;gap:18px}
  .feat-grid{grid-template-columns:1fr;gap:18px}
  .privacy-grid{grid-template-columns:1fr;gap:18px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .stat{padding:26px 14px}
  .review-grid{grid-template-columns:1fr}
  .vs{grid-template-columns:1fr;gap:8px}
  .vs-arrow{transform:rotate(90deg);margin:2px 0}
  .update{padding:22px 20px}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a>div{padding:0 18px 16px;font-size:14.5px}
  .download{padding:72px 0}
  .download-meta{font-size:12px;white-space:nowrap}
  .download-btns{flex-direction:column;gap:14px}
  .download-btns .btn{width:100%}
  .to-top{right:14px;bottom:20px}
  /* 对比表移动端堆叠 */
  .table-scroll{overflow:visible}
  .compare{display:block;border:none;background:none}
  .compare thead{display:none}
  .compare tbody{display:block}
  .compare tbody tr{
    display:block;background:var(--bg);border:1px solid var(--border);
    border-radius:var(--radius);padding:6px 18px;margin-bottom:14px;
  }
  .compare tbody td{
    display:flex;justify-content:space-between;align-items:baseline;gap:16px;
    padding:11px 0;border-top:none;border-bottom:1px dashed var(--border);
    font-size:14px;text-align:right;
  }
  .compare tbody td:last-child{border-bottom:none}
  .compare tbody td::before{content:attr(data-label);color:var(--text-2);font-size:12.5px;flex:none}
  .compare tbody td:first-child{color:var(--text);font-size:14px}
  .compare tbody td:nth-child(2){background:none;color:var(--primary-deep)}
  .compare tbody tr:nth-child(even) td{background:none}
  .compare tbody tr:hover td{background:none}
}