/* ===== 视频交友 免费版 官网 ===== */
: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:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font-family:inherit}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ===== 顶部导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.96);border-bottom:1px solid transparent;transition:box-shadow .3s,border-color .3s}
.nav.scrolled{box-shadow:0 6px 24px rgba(42,26,61,.08);border-color:var(--border)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:6px;font-size:22px;font-weight:800;color:var(--deep);letter-spacing:1px;min-height:44px}
.logo svg{color:var(--primary)}
.nav-links{display:flex;gap:24px}
.nav-links a{font-size:15px;font-weight:600;color:var(--text);transition:color .2s;padding:6px 2px;min-height:44px;display:inline-flex;align-items:center}
.nav-links a:hover{color:var(--primary-deep)}

/* ===== 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:none;border-radius:999px;font-weight:700;font-size:16px;padding:14px 34px;cursor:pointer;transition:transform .25s,box-shadow .25s;box-shadow:0 10px 24px rgba(240,61,116,.22)}
.btn:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(240,61,116,.3)}
.btn:active{transform:translateY(-1px)}
.btn-sm{font-size:14px;padding:9px 18px;min-height:38px;box-shadow:none}
.btn-lg{font-size:17px;padding:16px 40px}
.btn-ghost{background:#fff;color:var(--primary-deep);border:2px solid var(--primary);box-shadow:none}
.btn-ghost:hover{background:var(--primary-soft);box-shadow:0 12px 26px rgba(240,61,116,.18)}

/* ===== 首屏 Hero ===== */
.hero{padding:120px 0 80px;background:linear-gradient(180deg,var(--bg-soft) 0%,var(--bg) 72%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-main h1{font-size:40px;font-weight:900;color:var(--deep);line-height:1.35}
.ver{display:inline-block;margin-left:10px;padding:4px 14px;border-radius:999px;background:var(--primary-soft);color:var(--primary-deep);font-size:15px;font-weight:700;vertical-align:middle}
.hero-desc{font-size:17px;color:var(--text);line-height:1.85;max-width:540px;margin:20px 0 30px}
.hero-tip{display:flex;align-items:center;gap:6px;margin-top:18px;font-size:14px;color:var(--muted)}
.hero-tip svg{color:var(--primary);flex-shrink:0}

/* 聊天窗口 */
.chat{width:100%;max-width:430px;justify-self:center;background:var(--card);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow);overflow:hidden}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 16px;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff}
.chat-head img{width:44px;height:44px;border-radius:50%;object-fit:cover;border:2px solid rgba(255,255,255,.92);flex-shrink:0}
.chat-name{font-size:16px;font-weight:700;line-height:1.3}
.chat-status{display:flex;align-items:center;gap:5px;font-size:13px;color:rgba(255,255,255,.92);line-height:1.3}
.dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(46,197,126,.35);flex-shrink:0}
.chat-body{display:flex;flex-direction:column;gap:10px;padding:16px;min-height:260px;max-height:300px;overflow-y:auto;background:#fff}
.msg{max-width:82%;padding:10px 14px;border-radius:14px;font-size:14px;line-height:1.55;word-break:break-word}
.msg.ai{align-self:flex-start;background:var(--primary-soft);color:var(--text);border-top-left-radius:4px}
.msg.user{align-self:flex-end;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border-top-right-radius:4px}
.chat-foot{display:flex;gap:10px;padding:12px 16px;border-top:1px solid var(--border);background:#fff}
#chatInput{flex:1;min-width:0;border:1px solid var(--border);border-radius:999px;padding:10px 16px;font-size:16px;color:var(--muted);background:var(--bg);outline:none;cursor:default;user-select:none}
.btn-chat{flex-shrink:0;padding:10px 24px;border:none;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;font-size:14px;font-weight:700;cursor:pointer;min-height:44px;display:inline-flex;align-items:center;justify-content:center;transition:transform .25s,box-shadow .25s}
.btn-chat:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(240,61,116,.3)}
.btn-chat.off{background:#D9D2DE;transform:none;box-shadow:none;cursor:not-allowed}

/* 多种对象 */
.people{margin-top:64px}
.people h3{text-align:center;font-size:24px;font-weight:800;color:var(--deep)}
.people-sub{text-align:center;color:var(--muted);font-size:15px;margin-top:8px;margin-bottom:30px}
.people-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:18px}
.person{text-align:center}
.person 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}
.person figcaption{display:inline-block;margin-top:12px;padding:4px 14px;border-radius:999px;background:var(--primary-soft);color:var(--primary-deep);font-size:13px;font-weight:600}

/* ===== 通用区块 ===== */
.sec{padding:88px 0}
.sec-alt{background:var(--bg-soft)}
.sec-title{text-align:center;font-size:34px;font-weight:800;color:var(--deep);line-height:1.3}
.sec-sub{text-align:center;color:var(--muted);font-size:16px;margin-top:10px}
.cards4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:46px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px 26px;transition:transform .25s,box-shadow .25s}
.card:hover,.step:hover,.intro-card:hover,.person:hover img{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.card-ico{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:16px;background:var(--primary-soft);color:var(--primary-deep);margin-bottom:16px}
.card-ico svg{width:27px;height:27px}
.card h3{font-size:18px;font-weight:700;color:var(--deep);margin-bottom:10px}
.card p{font-size:14.5px;color:var(--text);line-height:1.7}

/* ===== 三步上手 ===== */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:46px}
.step{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:34px 28px;text-align:center;transition:transform .25s,box-shadow .25s}
.step-ico{display:inline-flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;margin-bottom:18px;box-shadow:0 8px 20px rgba(240,61,116,.25)}
.step-ico svg{width:30px;height:30px}
.step h3{font-size:19px;font-weight:700;color:var(--deep);margin-bottom:10px}
.step p{font-size:14.5px;color:var(--muted);line-height:1.7}

/* ===== 产品介绍 ===== */
.intro{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.intro-text p{font-size:16.5px;line-height:1.9;color:var(--text)}
.check-list{margin-top:26px;display:flex;flex-direction:column;gap:14px}
.check-list li{display:flex;align-items:center;gap:10px;font-size:15.5px;font-weight:600;color:var(--text)}
.check-list svg{flex-shrink:0;width:26px;height:26px;padding:4px;border-radius:50%;background:rgba(46,197,126,.14);color:var(--green)}
.intro-card{background:linear-gradient(160deg,#fff 0%,var(--bg-soft) 100%);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:46px 36px;text-align:center;transition:transform .25s,box-shadow .25s}
.intro-video{width:74px;height:74px;color:var(--primary);margin:0 auto 18px}
.intro-card h3{font-size:22px;font-weight:800;color:var(--deep)}
.intro-card p{color:var(--muted);font-size:15px;margin:10px 0 24px}
.intro-card .btn{width:100%}

/* ===== 优势对比 ===== */
.cmp-wrap{margin-top:46px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.cmp-scroll{overflow:visible}
.cmp{width:100%;table-layout:fixed;border-collapse:collapse}
.cmp th{padding:16px 18px;background:var(--deep);color:#fff;font-size:15px;font-weight:700;text-align:left}
.cmp .th-me{background:linear-gradient(90deg,var(--primary),var(--primary-deep))}
.cmp .th-other{background:#5A4A64}
.cmp td{padding:15px 18px;font-size:14.5px;color:var(--text);border-top:1px solid var(--border);vertical-align:middle}
.cmp tbody tr:nth-child(even) td:first-child{background:var(--bg)}
.cmp .td-me{background:var(--primary-soft);color:var(--primary-deep);font-weight:600}
.cmp .td-other{background:#F3EEF5;color:var(--muted)}
.mk{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:50%;margin-right:8px;flex-shrink:0;vertical-align:-4px}
.mk svg{width:12px;height:12px}
.mk.yes{background:rgba(46,197,126,.18);color:var(--green)}
.mk.no{background:#E3DCE8;color:#A89BAF}
.cmp-hint{display:none;align-items:center;justify-content:center;gap:6px;color:var(--muted);font-size:13px;margin-top:14px}

/* ===== 数据 ===== */
.data{background:var(--deep);color:#fff}
.data .sec-title{color:#fff}
.data .sec-sub{color:rgba(255,255,255,.72)}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:46px;text-align:center}
.data-item .num{font-size:46px;font-weight:900;color:#FF8FB0;line-height:1.2}
.data-item span{display:block;margin-top:8px;font-size:15px;color:rgba(255,255,255,.78)}

/* ===== 用户评价 ===== */
.rev{padding:26px}
.rev-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.rev-ava{display:flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:18px;font-weight:700;flex-shrink:0}
.rev-name{font-size:15.5px;font-weight:700;color:var(--deep)}
.rev-star{color:#FFB800;font-size:13px;letter-spacing:2px;margin-top:2px}
.rev-text{font-size:14.5px;color:var(--text);line-height:1.7}

/* ===== 隐私安全 ===== */
.privacy-intro{max-width:860px;margin:0 auto;text-align:center}
.privacy-intro p{font-size:16px;line-height:1.9;color:var(--text);margin-top:30px}
.card.mini{padding:26px 22px;text-align:left}

/* ===== 版本更新 ===== */
.update{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start}
.update-card{background:linear-gradient(160deg,var(--primary),var(--primary-deep));border-radius:var(--radius);box-shadow:var(--shadow-hover);padding:42px 30px;text-align:center;color:#fff}
.ver-tag{display:inline-block;padding:4px 14px;border-radius:999px;background:rgba(255,255,255,.22);font-size:13px}
.ver-big{font-size:44px;font-weight:900;margin:16px 0 8px}
.ver-date{font-size:14px;color:rgba(255,255,255,.92);margin-bottom:26px}
.update-card .btn{background:#fff;color:var(--primary-deep);box-shadow:0 10px 24px rgba(255,255,255,.3)}
.update-card .btn:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(255,255,255,.45)}
.update-log{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px 28px}
.update-log h3{font-size:19px;font-weight:800;color:var(--deep);margin-bottom:14px}
.update-log li{display:flex;align-items:center;gap:10px;padding:13px 0;border-bottom:1px dashed var(--border);font-size:14.5px;color:var(--text)}
.update-log li:last-child{border-bottom:none}
.log-type{flex-shrink:0;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:700}
.log-type.new{background:#E9FBF3;color:var(--green)}
.log-type.opt{background:var(--primary-soft);color:var(--primary-deep)}
.log-type.fix{background:#EEF1FF;color:#5B6DF5}

/* ===== FAQ ===== */
.faq-list{max-width:780px;margin:46px auto 0;display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 22px;background:#fff;border:none;cursor:pointer;font-size:16px;font-weight:700;color:var(--deep);text-align:left;transition:background .2s}
.faq-q:hover,.faq-item.open .faq-q{background:var(--bg-soft)}
.faq-q svg{width:20px;height:20px;color:var(--primary);flex-shrink:0;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-a p{padding:0 22px 18px;font-size:14.5px;color:var(--text);line-height:1.75}

/* ===== 下载区域 ===== */
.dl{background:linear-gradient(160deg,var(--bg-soft) 0%,var(--bg) 100%);text-align:center}
.dl-meta{margin:16px 0 28px;font-size:14px;color:var(--muted);white-space:nowrap}
.dl-btns{display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.dl-tip{margin-top:24px;font-size:14.5px;font-weight:600;color:var(--primary-deep)}

/* ===== 页脚 ===== */
.footer{background:var(--deep);color:rgba(255,255,255,.72);text-align:center;padding:28px 0;font-size:14px}
.footer a{color:#fff;font-weight:700;transition:color .2s}
.footer a:hover{color:var(--primary)}

/* ===== 返回顶部 ===== */
.top{position:fixed;right:24px;bottom:24px;z-index:100;width:48px;height:48px;border:none;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 10px 24px rgba(240,61,116,.3);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .3s,visibility .3s,transform .3s}
.top.show{opacity:1;visibility:visible;transform:none}
.top svg{width:22px;height:22px}

/* ===== 响应式 ===== */
@media (max-width:1100px){
  .people-grid{grid-template-columns:repeat(2,1fr)}
  .cards4{grid-template-columns:repeat(2,1fr)}
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .hero-main h1{font-size:34px}
  .sec-title{font-size:30px}
  .ver-big{font-size:40px}
}
@media (max-width:900px){
  .nav-links{display:none}
  .hero{padding:104px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-main{text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .hero-tip{justify-content:center}
  .intro{grid-template-columns:1fr;gap:40px}
  .steps{grid-template-columns:1fr;gap:18px}
  .update{grid-template-columns:1fr;gap:36px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .sec{padding:60px 0}
  .btn-sm{padding:11px 20px;min-height:44px}
  .hero .btn-lg{width:100%;max-width:420px;margin-left:auto;margin-right:auto}
  .cmp-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .cmp{min-width:640px}
  .cmp th,.cmp td{padding:14px 16px}
  .cmp-hint{display:flex}
  .dl-btns{flex-direction:column;width:100%;max-width:420px;margin:0 auto}
  .dl-btns .btn{width:100%}
  .dl-meta{font-size:12px}
}
@media (max-width:640px){
  .cards4{grid-template-columns:1fr}
  .data-grid{gap:18px}
  .data-item .num{font-size:36px}
  .chat-body{min-height:200px;max-height:240px}
  .hero-grid{gap:32px}
  .people{margin-top:52px}
  .people-grid{gap:14px}
  .person figcaption{font-size:12px;padding:3px 10px}
  .top{right:16px;bottom:16px;width:44px;height:44px}
}