/* ===== theone陪伴 官网落地页样式 ===== */
:root{
  --primary:#FF5C8A;
  --primary-deep:#F03E7F;
  --primary-light:#FFD9E6;
  --grad:linear-gradient(135deg,#FF7BA9,#B388FF);
  --dark:#3A2B4D;
  --text:#45354F;
  --muted:#8A7A95;
  --border:#FFE0EB;
  --bg:#FFF9FC;
  --card:#FFFFFF;
  --shadow:0 8px 24px rgba(255,92,138,.10);
  --shadow-hover:0 16px 40px rgba(255,92,138,.20);
  --radius:16px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:70px}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-alt{background:var(--card)}
.sec-head{text-align:center;margin-bottom:48px}
.sec-head h2{font-size:32px;color:var(--dark);letter-spacing:.5px}
.sec-head p{color:var(--muted);margin-top:10px;font-size:15px}
.ver{color:var(--primary-deep);font-size:.55em;font-weight:700;vertical-align:middle;margin-left:4px;display:inline-block}

/* ===== 顶部导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1280px;margin:0 auto;padding:12px 24px;display:flex;align-items:center;gap:24px}
.logo{font-size:22px;font-weight:800;color:var(--dark);white-space:nowrap;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.nav-menu{display:flex;gap:2px;flex:1;justify-content:center}
.nav-menu a{font-size:13.5px;color:var(--text);padding:6px 9px;border-radius:8px;transition:color .2s,background .2s;white-space:nowrap}
.nav-menu a:hover{color:var(--primary-deep);background:var(--primary-light)}
.nav-btn{font-size:13.5px;color:#fff;background:var(--grad);padding:8px 18px;border-radius:999px;font-weight:600;white-space:nowrap;transition:transform .2s,box-shadow .2s}
.nav-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}

/* ===== 按钮 ===== */
.btn-main{display:inline-flex;align-items:center;justify-content:center;color:#fff;background:var(--grad);padding:14px 40px;border-radius:999px;font-size:17px;font-weight:700;text-align:center;transition:transform .2s,box-shadow .2s}
.btn-main:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.btn-outline{background:var(--card);color:var(--primary-deep);border:2px solid var(--primary);font-size:15px;padding:12px 30px}
.btn-outline:hover{background:var(--primary-light)}

/* ===== 首屏 Hero ===== */
.hero{position:relative;padding:130px 0 80px;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:radial-gradient(circle at 15% 20%,#FFE3F0 0%,transparent 45%),radial-gradient(circle at 85% 80%,#EFE6FF 0%,transparent 45%),linear-gradient(180deg,#FFF6FB,var(--bg));z-index:0}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-left h1{font-size:46px;line-height:1.25;color:var(--dark);font-weight:800;letter-spacing:.5px}
.hero-desc{margin:20px 0 28px;font-size:16.5px;color:var(--muted);max-width:520px}
.hero-personas{margin-top:34px}
.hero-personas-title{font-size:14px;color:var(--muted);margin-bottom:14px}
.persona-row{display:flex;gap:16px;flex-wrap:wrap}
.p-item{display:flex;flex-direction:column;align-items:center;gap:8px;cursor:pointer}
.p-item img{width:64px;height:64px;border-radius:50%;object-fit:cover;border:2px solid #fff;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.p-item:hover img{transform:translateY(-4px) scale(1.05);box-shadow:var(--shadow-hover)}
.p-item span{font-size:12.5px;color:var(--text)}
.p-item:last-child span{color:var(--primary-deep)}

/* ===== 聊天窗口 ===== */
.hero-right{position:relative}
.hero-float{position:absolute;top:-28px;left:-32px;width:128px;border-radius:18px;overflow:hidden;border:4px solid #fff;box-shadow:var(--shadow-hover);transform:rotate(-8deg);z-index:2}
.hero-float img{width:100%}
.chat-card{background:var(--card);border-radius:24px;box-shadow:var(--shadow-hover);border:1px solid var(--border);overflow:hidden;max-width:360px;margin:0 auto;position:relative;z-index:1}
.chat-head{display:flex;align-items:center;gap:10px;padding:12px 14px;background:var(--grad);color:#fff}
.chat-back{font-size:22px;line-height:1;opacity:.9}
.chat-avatar{width:36px;height:36px;border-radius:50%;object-fit:cover;border:2px solid rgba(255,255,255,.7)}
.chat-title{flex:1;line-height:1.2}
.chat-title b{display:block;font-size:15px}
.chat-status{font-size:11.5px;opacity:.9;display:flex;align-items:center;gap:4px}
.chat-status i{width:7px;height:7px;border-radius:50%;background:#7CFC9A;display:inline-block}
.chat-more{letter-spacing:2px;opacity:.9}
.chat-body{background:linear-gradient(180deg,#FFF4F9,#FFFDFE);padding:16px 14px;min-height:300px;display:flex;flex-direction:column;gap:12px}
.msg{max-width:78%;padding:9px 13px;border-radius:14px;font-size:13.5px;line-height:1.55;animation:msgIn .4s ease both}
.msg p{word-break:break-word}
.msg.ai{align-self:flex-start;background:#fff;border:1px solid var(--border);border-bottom-left-radius:4px;box-shadow:var(--shadow)}
.msg.me{align-self:flex-end;background:var(--grad);color:#fff;border-bottom-right-radius:4px}
.msg.typing{color:var(--muted);font-size:12.5px}
.msg.typing span{animation:dot 1.2s infinite;display:inline-block}
.msg.typing span:nth-child(2){animation-delay:.2s}
.msg.typing span:nth-child(3){animation-delay:.4s}
@keyframes dot{0%,60%,100%{opacity:.2}30%{opacity:1}}
@keyframes msgIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.chat-input{display:flex;align-items:center;gap:8px;padding:10px 12px;border-top:1px solid var(--border);background:#fff}
.chat-input input{flex:1;border:none;outline:none;background:#F5F2F7;border-radius:999px;padding:8px 14px;font-size:13px;color:var(--text)}
.chat-input span{font-size:17px;cursor:pointer}

/* ===== 三步上手 ===== */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:32px 26px;text-align:center;transition:transform .25s,box-shadow .25s}
.step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.step-num{display:inline-flex;width:52px;height:52px;border-radius:50%;background:var(--grad);color:#fff;font-size:18px;font-weight:800;align-items:center;justify-content:center;margin-bottom:18px}
.step-card h3{font-size:19px;color:var(--dark);margin-bottom:10px}
.step-card p{font-size:14px;color:var(--muted)}

/* ===== 产品介绍 ===== */
.product-inner{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:center}
.product-img img{border-radius:24px;box-shadow:var(--shadow-hover);border:1px solid var(--border);width:100%}
.product-text h2{font-size:30px;color:var(--dark);margin-bottom:18px}
.product-text p{font-size:15px;color:var(--muted);margin-bottom:16px}
.product-points li{position:relative;padding-left:24px;font-size:15px;color:var(--text);margin-bottom:10px}
.product-points li::before{content:"";position:absolute;left:0;top:8px;width:12px;height:12px;border-radius:50%;background:var(--grad)}

/* ===== 核心功能 ===== */
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 22px;transition:transform .25s,box-shadow .25s}
.feat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.feat-icon{display:inline-flex;width:56px;height:56px;border-radius:16px;background:var(--primary-light);align-items:center;justify-content:center;font-size:26px;margin-bottom:16px}
.feat-card h3{font-size:18px;color:var(--dark);margin-bottom:10px}
.feat-card p{font-size:13.5px;color:var(--muted)}

/* ===== 优势对比 ===== */
.compare-grid{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.cmp-row{display:flex}
.cmp-row>*{flex:1}
.cmp-head,.cmp-dim,.cmp-cell{padding:16px 18px;font-size:14px;border-bottom:1px solid var(--border)}
.cmp-row:last-child .cmp-head,.cmp-row:last-child .cmp-dim,.cmp-row:last-child .cmp-cell{border-bottom:none}
.cmp-head{font-weight:700;color:var(--dark);background:#FFF4F9;text-align:center;display:flex;align-items:center;justify-content:center}
.cmp-head.cmp-theone{color:#fff;background:var(--grad)}
.cmp-dim{font-weight:600;color:var(--dark);background:#FFF7FB;display:flex;align-items:center}
.cmp-cell{color:var(--muted);display:flex;align-items:center}
.cmp-cell.v-theone{color:var(--primary-deep);font-weight:600;background:#FFF7FB}

/* ===== 使用场景 ===== */
.scenes-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;max-width:900px;margin:0 auto 40px}
.scene-item{display:flex;align-items:flex-start;gap:12px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;transition:transform .25s,box-shadow .25s}
.scene-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.scene-check{flex:none;width:22px;height:22px;border-radius:50%;background:var(--grad);color:#fff;font-size:12px;display:flex;align-items:center;justify-content:center;margin-top:3px}
.scene-item p{font-size:15px;color:var(--text)}
.scenes-vs{display:flex;align-items:center;justify-content:center;gap:20px;flex-wrap:wrap}
.vs-box{padding:14px 28px;border-radius:999px;font-size:15px;font-weight:600}
.vs-bad{background:#F1EDF5;color:#9C8FAA;text-decoration:line-through}
.vs-good{background:var(--grad);color:#fff;box-shadow:var(--shadow-hover)}
.vs-arrow{font-weight:800;color:var(--primary-deep)}

/* ===== 数据模块 ===== */
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.data-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);text-align:center;padding:34px 20px;transition:transform .25s,box-shadow .25s}
.data-item:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.data-item b{display:block;font-size:34px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:6px}
.data-item span{font-size:14px;color:var(--muted)}

/* ===== 人设定制 ===== */
.persona-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.persona-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .25s,box-shadow .25s}
.persona-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.persona-card img{width:100%;height:230px;object-fit:cover}
.persona-card h3{font-size:19px;color:var(--dark);padding:18px 20px 6px}
.persona-card p{font-size:14px;color:var(--muted);padding:0 20px 22px}
.persona-custom{border:2px solid var(--primary)}
.persona-custom h3{color:var(--primary-deep)}

/* ===== 用户评价 ===== */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .25s,box-shadow .25s}
.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.rv-avatar{flex:none;width:46px;height:46px;border-radius:50%;background:var(--grad);color:#fff;font-size:19px;font-weight:700;display:flex;align-items:center;justify-content:center}
.rv-meta b{display:block;font-size:15px;color:var(--dark)}
.rv-stars{font-size:13px;color:#FFB800;letter-spacing:1px}
.review-card p{font-size:14px;color:var(--muted)}

/* ===== 隐私安全 ===== */
.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.privacy-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 22px;text-align:center;transition:transform .25s,box-shadow .25s}
.privacy-item:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.privacy-icon{display:inline-flex;width:56px;height:56px;border-radius:50%;background:var(--primary-light);align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.privacy-item h3{font-size:17px;color:var(--dark);margin-bottom:8px}
.privacy-item p{font-size:13px;color:var(--muted)}

/* ===== 版本更新 ===== */
.version-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:34px 40px;max-width:820px;margin:0 auto}
.version-card ul li{position:relative;padding:9px 0 9px 26px;font-size:15px;color:var(--text);border-bottom:1px dashed var(--border)}
.version-card ul li:last-child{border-bottom:none}
.version-card ul li::before{content:"";position:absolute;left:0;top:17px;width:9px;height:9px;border-radius:50%;background:var(--grad)}

/* ===== FAQ ===== */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:14px;overflow:hidden;transition:box-shadow .25s}
.faq-item.open{box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;background:none;border:none;cursor:pointer;padding:18px 22px;font-size:16px;font-weight:600;color:var(--dark);text-align:left;font-family:inherit}
.faq-icon{flex:none;width:26px;height:26px;border-radius:50%;background:var(--primary-light);color:var(--primary-deep);display:flex;align-items:center;justify-content:center;font-size:16px;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 20px;font-size:14px;color:var(--muted)}

/* ===== 下载区域 ===== */
.download{background:linear-gradient(160deg,#FFF1F7,#F4ECFF);text-align:center}
.download h1{font-size:40px;color:var(--dark);font-weight:800}
.dl-meta{font-size:14px;color:var(--muted);margin:16px 0 28px}
.dl-btns{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
.dl-tip{margin-top:24px;font-size:14px;color:var(--text)}

/* ===== 页脚 ===== */
.footer{background:var(--dark);padding:36px 0;text-align:center}
.footer-link{color:#fff;font-size:16px;font-weight:600;letter-spacing:.5px}
.footer-link:hover{color:var(--primary-light)}
.footer p{color:rgba(255,255,255,.55);font-size:13px;margin-top:10px}

/* ===== 返回顶部 ===== */
.back-top{position:fixed;right:26px;bottom:30px;width:46px;height:46px;border:none;border-radius:50%;background:var(--grad);color:#fff;font-size:20px;cursor:pointer;box-shadow:var(--shadow-hover);opacity:0;visibility:hidden;transform:translateY(16px);transition:opacity .3s,transform .3s,visibility .3s;z-index:99}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{transform:translateY(-4px)}

/* ===== 平板适配 ===== */
@media(max-width:1024px){
  .nav-menu{display:none}
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .hero-left{text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .persona-row{justify-content:center}
  .hero-personas-title{text-align:center}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .privacy-grid{grid-template-columns:repeat(2,1fr)}
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .persona-grid{grid-template-columns:repeat(2,1fr)}
}

/* ===== 手机适配 ===== */
@media(max-width:768px){
  .nav-inner{padding:10px 16px}
  .logo{font-size:19px}
  .nav-btn{font-size:13px;padding:7px 14px;margin-left:auto}
  .section{padding:56px 20px}
  .container{padding:0}
  .sec-head{margin-bottom:32px}
  .sec-head h2{font-size:24px}
  .hero{padding:110px 20px 56px}
  .hero-left h1{font-size:30px}
  .hero-desc{font-size:15px;margin-top:14px;margin-bottom:22px}
  .hero-actions .btn-main{width:100%;font-size:16px;padding:14px 20px}
  .hero-personas{margin-top:26px}
  .p-item img{width:56px;height:56px}
  .persona-row{gap:12px}
  .p-item span{font-size:11.5px}
  .chat-card{max-width:100%}
  .chat-body{min-height:260px}
  .hero-float{position:static;width:104px;margin:0 auto 14px;transform:none;border-width:3px}
  .steps-grid{grid-template-columns:1fr;gap:16px}
  .product-inner{grid-template-columns:1fr;gap:28px}
  .product-text h2{font-size:24px}
  .features-grid{grid-template-columns:1fr;gap:16px}
  .scenes-grid{grid-template-columns:1fr;gap:12px}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .data-item b{font-size:26px}
  .persona-grid{grid-template-columns:1fr;gap:16px}
  .reviews-grid{grid-template-columns:1fr;gap:16px}
  .privacy-grid{grid-template-columns:1fr;gap:16px}
  .version-card{padding:24px 20px}
  .compare-grid{border:none;background:none;display:block}
  .cmp-row{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:12px;margin-bottom:14px}
  .cmp-head,.cmp-dim,.cmp-cell{border-bottom:none;padding:10px}
  .cmp-heads{display:none}
  .cmp-dim{grid-column:1/-1;background:var(--primary-light);border-radius:10px;font-weight:700;justify-content:center;padding:10px;margin-bottom:4px}
  .cmp-cell{font-size:12px;justify-content:center;text-align:center;flex-direction:column;gap:4px;background:#FFF9FC;border-radius:10px}
  .cmp-cell.v-theone{background:#FFF0F6}
  .cmp-cell.v-theone::before,.cmp-cell.v-real::before,.cmp-cell.v-ai::before{display:block;font-size:11px;font-weight:700;margin-bottom:4px}
  .cmp-cell.v-theone::before{content:"theone陪伴";color:var(--primary-deep)}
  .cmp-cell.v-real::before{content:"真人社交";color:var(--muted)}
  .cmp-cell.v-ai::before{content:"普通AI";color:var(--muted)}
  .faq-q{font-size:14.5px;padding:16px 16px}
  .faq-a-inner{padding:0 16px 16px;font-size:13.5px}
  .download h1{font-size:28px}
  .dl-meta{font-size:11.5px;white-space:nowrap;letter-spacing:.2px}
  .dl-btns{flex-direction:column;gap:14px;padding:0 20px}
  .btn-main{width:100%;font-size:16px;padding:14px 20px}
  .dl-tip{font-size:13px;padding:0 10px}
  .footer{padding:28px 20px}
  .back-top{right:16px;bottom:20px;width:42px;height:42px}
}