/* ===== lovemo 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;
  --radius:18px;
  --shadow:0 10px 30px rgba(240,61,116,.08);
  --shadow-hover:0 18px 42px rgba(240,61,116,.16);
  --nav-h:70px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--nav-h)}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
button{font-family:inherit;cursor:pointer}
ul{list-style:none}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-alt{background:var(--bg-soft)}
.sec-title{font-size:34px;line-height:1.4;text-align:center;color:var(--deep);font-weight:700}
.sec-title.left{text-align:left;font-size:30px;margin-bottom:18px}
.sec-title.light{color:#fff}
.sec-sub{text-align:center;color:var(--muted);margin:12px 0 44px;font-size:16px}
.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-size:17px;font-weight:600;padding:14px 36px;border:none;transition:transform .25s,box-shadow .25s;box-shadow:0 10px 26px rgba(240,61,116,.28);min-height:48px}
.btn:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(240,61,116,.36)}
.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)}

/* ===== 1 导航 ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,249,251,.92);backdrop-filter:blur(10px);transition:box-shadow .3s}
.header.scrolled{box-shadow:0 6px 24px rgba(240,61,116,.10)}
.header-inner{display:flex;align-items:center;gap:18px;height:var(--nav-h)}
.logo{display:flex;align-items:center;gap:8px;font-size:22px;font-weight:800;color:var(--deep);letter-spacing:.5px;flex-shrink:0;min-height:44px}
.logo svg{width:28px;height:28px}
.logo svg path{fill:var(--primary)}
.nav{display:flex;align-items:center;gap:2px;margin:0 auto;flex-wrap:nowrap;overflow:hidden}
.nav a{font-size:13.5px;color:var(--text);padding:8px 10px;border-radius:8px;white-space:nowrap;transition:color .2s,background .2s}
.nav a:hover{color:var(--primary-deep);background:var(--primary-soft)}
.btn-download-nav{font-size:14px;padding:8px 20px;min-height:40px;flex-shrink:0}

/* ===== 2 Hero ===== */
.hero{background:linear-gradient(180deg,var(--bg-soft) 0%,var(--bg) 100%);padding:calc(var(--nav-h) + 56px) 0 64px}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-left h1{font-size:44px;line-height:1.3;color:var(--deep);font-weight:800}
.ver{font-size:20px;font-weight:700;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;padding:4px 14px;vertical-align:8px;margin-left:8px;white-space:nowrap}
.hero-desc{font-size:17px;color:var(--text);margin:20px 0 30px;max-width:520px}
.btn-hero{font-size:18px;padding:16px 42px}
.hero-sub{margin-top:16px;color:var(--muted);font-size:14px}

.chat-card{background:#fff;border:1px solid var(--border);border-radius:22px;box-shadow:0 18px 48px rgba(240,61,116,.14);overflow:hidden;width:100%;max-width:420px;margin:0 auto}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 16px;background:linear-gradient(90deg,var(--primary),var(--primary-deep))}
.chat-avatar{width:48px;height:48px;border-radius:50%;border:2px solid #fff;object-fit:cover;flex-shrink:0}
.chat-head-info{display:flex;flex-direction:column;line-height:1.35}
.chat-name{color:#fff;font-weight:700;font-size:16px}
.chat-status{color:#FFE9F1;font-size:12px;display:flex;align-items:center;gap:5px}
.chat-status .dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(46,197,126,.25);flex-shrink:0}
.chat-body{background:var(--bg);padding:18px 16px;min-height:240px;max-height:300px;overflow-y:auto;display:flex;flex-direction:column;gap:12px}
.msg{max-width:78%;padding:11px 14px;border-radius:16px;font-size:14.5px;line-height:1.65;word-break:break-word}
.msg.ai{align-self:flex-start;background:#fff;border:1px solid var(--border);border-top-left-radius:4px;color:var(--text)}
.msg.me{align-self:flex-end;background:linear-gradient(135deg,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:1px solid var(--border);border-radius:999px;padding:10px 18px;font-size:13.5px;color:var(--muted);background:var(--bg);outline:none;min-height:42px}
.chat-send{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));border:none;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:opacity .3s,transform .2s}
.chat-send svg{width:20px;height:20px;fill:#fff}
.chat-send:hover{transform:scale(1.06)}
.chat-send.disabled{opacity:.4;cursor:not-allowed;transform:none}

.personas{margin-top:60px;text-align:center}
.persona-title{font-size:22px;color:var(--deep);font-weight:700;margin-bottom:26px}
.persona-card-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.persona{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:14px 12px 12px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s;cursor:pointer}
.persona:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.persona img{width:100%;aspect-ratio:1;border-radius:14px;object-fit:cover}
.persona figcaption{font-size:14px;font-weight:600;color:var(--text);margin-top:10px}

/* ===== 3 三步上手 ===== */
.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.step{padding:34px 28px;position:relative}
.step-num{font-size:40px;font-weight:800;color:var(--primary-soft);line-height:1;display:block;margin-bottom:14px}
.step h3{font-size:20px;color:var(--deep);margin-bottom:10px}
.step p{color:var(--muted);font-size:15px}

/* ===== 4 产品介绍 ===== */
.intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.intro-text p{color:var(--text);font-size:16px;margin-bottom:24px}
.check-list li{display:flex;align-items:center;gap:10px;font-size:16px;color:var(--text);margin-bottom:14px;font-weight:500}
.check-list svg{width:22px;height:22px;fill:var(--green);flex-shrink:0}
.intro-img img{border-radius:24px;box-shadow:var(--shadow-hover)}

/* ===== 5 核心功能 ===== */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feat{padding:30px 24px}
.feat-icon{width:56px;height:56px;border-radius:16px;background:var(--primary-soft);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.feat-icon svg{width:28px;height:28px;fill:var(--primary-deep)}
.feat h3{font-size:19px;color:var(--deep);margin-bottom:8px}
.feat .pain{font-size:13px;color:var(--primary-deep);background:var(--primary-soft);border-radius:8px;padding:5px 10px;display:inline-block;margin-bottom:12px;line-height:1.5}
.feat p:last-child{color:var(--muted);font-size:14.5px}

/* ===== 6 优势对比 ===== */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius);box-shadow:var(--shadow)}
.compare-table{width:100%;min-width:640px;border-collapse:collapse;background:#fff;font-size:15px}
.compare-table th,.compare-table td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--border)}
.compare-table thead th{background:var(--deep);color:#fff;font-weight:600;white-space:nowrap}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table tbody tr:hover td{background:var(--bg)}
.col-hot{color:var(--primary-deep);font-weight:600}
.table-tip{display:none;text-align:center;color:var(--muted);font-size:13px;margin-top:12px}

/* ===== 7 使用场景 ===== */
.scene-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 32px;max-width:860px;margin:0 auto 46px}
.scene-list li{display:flex;align-items:center;gap:12px;font-size:16px;color:var(--text);background:#fff;border:1px solid var(--border);border-radius:14px;padding:13px 18px;box-shadow:var(--shadow)}
.ok{color:var(--green);font-weight:700;flex-shrink:0}
.vs-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.vs{padding:30px 28px}
.vs h3{font-size:19px;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.vs-bad h3{color:#B96A7E}
.vs-good h3{color:var(--primary-deep)}
.vs ul li{position:relative;padding-left:22px;color:var(--muted);font-size:15px;margin-bottom:10px}
.vs-bad ul li::before{content:"×";position:absolute;left:0;color:#D98BA0;font-weight:700}
.vs-good ul li::before{content:"✔";position:absolute;left:0;color:var(--green);font-weight:700}

/* ===== 8 数据 ===== */
.stats{background:linear-gradient(135deg,var(--deep) 0%,#452A63 100%);color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;text-align:center}
.stat .num{font-size:52px;font-weight:800;background:linear-gradient(90deg,#FF9DBB,#FF5C8A);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1.2;display:inline-block}
.stat p{margin-top:6px;font-size:16px;color:rgba(255,255,255,.85)}

/* ===== 9 人设定制 ===== */
.persona-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:56px;align-items:center}
.persona-img img{border-radius:24px;box-shadow:var(--shadow-hover)}
.persona-text p{color:var(--text);font-size:16px;margin-bottom:30px}

/* ===== 10 用户评价 ===== */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{padding:26px 24px}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{width:46px;height:46px;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}
.review-meta{display:flex;flex-direction:column;line-height:1.4}
.rname{font-weight:600;color:var(--deep);font-size:15.5px}
.stars{color:#FFB02E;font-size:13px;letter-spacing:2px}
.review p{color:var(--muted);font-size:14.5px}

/* ===== 11 隐私安全 ===== */
.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.privacy{padding:30px 24px;text-align:left}
.privacy-icon{width:52px;height:52px;border-radius:16px;background:var(--primary-soft);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.privacy-icon svg{width:26px;height:26px;fill:var(--primary-deep)}
.privacy h3{font-size:18px;color:var(--deep);margin-bottom:8px}
.privacy p{color:var(--muted);font-size:14px}

/* ===== 12 版本更新 ===== */
.changelog-head{display:flex;align-items:center;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:30px}
.ver-badge{background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;font-size:17px;font-weight:700;border-radius:999px;padding:9px 24px}
.changelog-date{color:var(--muted);font-size:14.5px}
.changelog-list{max-width:760px;margin:0 auto}
.changelog-list li{display:flex;align-items:flex-start;gap:14px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:15px 20px;margin-bottom:12px;font-size:15px;color:var(--text);box-shadow:var(--shadow)}
.tag{font-size:12.5px;font-weight:600;border-radius:8px;padding:3px 10px;flex-shrink:0;margin-top:2px}
.tag-new{background:var(--primary-soft);color:var(--primary-deep)}
.tag-up{background:#E8F3FF;color:#2E7DD1}
.tag-fix{background:#EAF8F1;color:#1E9E63}

/* ===== 13 FAQ ===== */
.faq-wrap{max-width:820px}
.faq-list{margin-top:36px}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:14px;margin-bottom:14px;overflow:hidden;box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;background:none;border:none;padding:18px 22px;font-size:16px;font-weight:600;color:var(--deep);text-align:left;min-height:56px}
.faq-arrow{width:10px;height:10px;border-right:2px solid var(--primary);border-bottom:2px solid var(--primary);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 div{padding:0 22px 20px;color:var(--muted);font-size:14.5px}
.faq-item.open .faq-a{max-height:300px}

/* ===== 14 下载区域 ===== */
.download{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-deep) 100%);text-align:center;color:#fff}
.dl-title{font-size:38px;font-weight:800;color:#fff}
.download .ver{background:rgba(255,255,255,.18);color:#fff;vertical-align:6px}
.dl-meta{color:rgba(255,255,255,.9);font-size:14px;margin:16px 0 30px}
.dl-btns{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
.btn-dl{background:#fff;color:var(--primary-deep);font-size:17px;padding:15px 38px;box-shadow:0 12px 30px rgba(42,26,61,.25);min-width:230px}
.btn-dl:hover{background:var(--bg);box-shadow:0 18px 38px rgba(42,26,61,.32)}
.dl-tip{margin-top:26px;font-size:15px;color:#FFE9F1}

/* ===== 15 页脚 ===== */
.footer{background:var(--deep);color:rgba(255,255,255,.72);text-align:center;padding:26px 0;font-size:14px}
.footer-link{color:#fff;font-weight:600}

/* ===== 16 返回顶部 ===== */
.back-top{position:fixed;right:26px;bottom:34px;width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));border:none;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(14px);transition:opacity .3s,transform .3s,visibility .3s;box-shadow:0 10px 26px rgba(240,61,116,.32);z-index:90}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top svg{width:22px;height:22px;fill:#fff}
.back-top:hover{transform:translateY(-3px)}

/* ===== 响应式 ===== */
@media (max-width:1100px){
  .persona-card-grid{grid-template-columns:repeat(3,1fr)}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .privacy-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .sec-title{font-size:30px}
  .hero-left h1{font-size:38px}
  .nav a{padding:8px 7px;font-size:12.5px}
}
@media (max-width:900px){
  .nav{display:none}
  .header-inner{justify-content:space-between}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-left{text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .intro-grid,.persona-grid{grid-template-columns:1fr;gap:36px}
  .intro-img img,.persona-img img{width:100%;max-width:560px;margin:0 auto}
  .intro-text .sec-title.left{text-align:center}
  .persona-text{text-align:center}
  .vs-grid{grid-template-columns:1fr}
  .section{padding:68px 0}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .sec-title{font-size:26px}
  .sec-title.left{font-size:24px;text-align:center}
  .sec-sub{font-size:14.5px;margin-bottom:32px}
  .table-tip{display:block}
  .dl-btns{flex-direction:column;align-items:stretch}
  .btn-dl{width:100%;max-width:none}
  .dl-meta{font-size:12.5px;white-space:nowrap}
  .hero{padding-top:calc(var(--nav-h) + 36px)}
  .hero-left h1{font-size:32px}
  .ver{font-size:16px}
  .hero-desc{font-size:15.5px}
  .chat-card{max-width:100%}
  .chat-body{min-height:210px;max-height:250px}
  .scene-list{grid-template-columns:1fr;gap:10px}
  .changelog-head{flex-direction:column;gap:10px}
  .back-top{right:16px;bottom:22px;width:46px;height:46px}
}
@media (max-width:640px){
  .persona-card-grid{gap:12px}
  .feat-grid{grid-template-columns:1fr}
  .privacy-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .stats-grid{gap:20px}
  .stat .num{font-size:38px}
  .step-grid{grid-template-columns:1fr;gap:18px}
  .btn-hero{font-size:16px;padding:14px 30px;width:100%}
  .persona-title{font-size:19px}
  .persona figcaption{font-size:12.5px}
  .dl-title{font-size:28px}
  .download .ver{font-size:14px}
  .dl-tip{font-size:13.5px}
  .faq-q{font-size:15px;padding:16px 16px}
  .faq-a div{padding:0 16px 18px}
  .logo{font-size:19px}
  .btn-download-nav{font-size:13px;padding:8px 14px;min-height:44px}
}