/* ===== viggleai 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;
  --star:#FFC53D;
  --radius:18px;
  --shadow:0 10px 30px rgba(240,61,116,.08);
  --shadow-hover:0 18px 42px rgba(240,61,116,.16);
  --nav-h:64px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px;-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;padding-top:var(--nav-h)}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.sec-title{font-size:34px;font-weight:800;color:var(--deep);text-align:center;line-height:1.35}
.sec-sub{color:var(--muted);text-align:center;margin:12px auto 44px;max-width:640px;font-size:16px}

/* ===== 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-weight:700;min-height:44px;padding:12px 32px;transition:transform .25s,box-shadow .25s,opacity .25s;white-space:nowrap}
.btn:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.btn-lg{font-size:17px;padding:16px 40px}
.btn-sm{font-size:14px;padding:8px 20px;min-height:36px}

/* ===== 顶部导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,249,251,.92);backdrop-filter:blur(10px);transition:box-shadow .25s}
.nav.scrolled{box-shadow:0 6px 24px rgba(240,61,116,.10)}
.nav-inner{max-width:1160px;margin:0 auto;padding:0 24px;height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:inline-flex;align-items:center;gap:8px;font-size:22px;font-weight:800;color:var(--deep);min-height:44px}
.logo-heart{width:24px;height:24px;color:var(--primary)}
.nav-menu{display:flex;gap:28px}
.nav-menu a{font-size:15px;font-weight:600;color:var(--text);position:relative;transition:color .2s}
.nav-menu a:hover{color:var(--primary)}
.nav-menu a::after{content:"";position:absolute;left:0;bottom:-4px;width:0;height:2px;background:var(--primary);border-radius:2px;transition:width .25s}
.nav-menu a:hover::after{width:100%}
.nav-download{flex-shrink:0;min-height:44px;padding:10px 22px}

/* ===== 首屏 Hero ===== */
.hero{padding:72px 0 0;background:linear-gradient(180deg,var(--bg-soft),var(--bg))}
.hero-inner{max-width:1160px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-title{font-size:44px;font-weight:900;color:var(--deep);line-height:1.3;display:flex;align-items:center;flex-wrap:wrap;gap:12px}
.hero-title .brand{background:linear-gradient(90deg,var(--primary),var(--primary-deep));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-title .ver{font-size:18px;font-weight:700;color:var(--primary);border:1px solid var(--primary);border-radius:999px;padding:4px 14px;background:var(--primary-soft)}
.hero-desc{color:var(--text);margin:22px 0 30px;font-size:17px;max-width:560px}
.hero-download{font-size:18px;padding:17px 46px}
.personas{margin-top:48px}
.personas-title{font-size:20px;font-weight:800;color:var(--deep);margin-bottom:18px}
.personas-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.persona{text-align:center;cursor:default}
.persona img{width:84px;height:84px;border-radius:50%;object-fit:cover;margin:0 auto;border:3px solid var(--card);box-shadow:var(--shadow);transition:transform .25s}
.persona:hover img{transform:translateY(-6px) scale(1.04);box-shadow:var(--shadow-hover)}
.persona figcaption{font-size:13px;color:var(--text);font-weight:600;margin-top:8px}

/* ===== 聊天窗口 ===== */
.hero-side{display:flex;justify-content:center}
.chat-window{width:100%;max-width:420px;border-radius:24px;overflow:hidden;background:linear-gradient(160deg,#3A2456,#241639);box-shadow:0 24px 60px rgba(42,26,61,.28);border:1px solid rgba(255,255,255,.08)}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 16px;background:rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.08)}
.chat-avatar{width:44px;height:44px;border-radius:50%;object-fit:cover;border:2px solid var(--primary)}
.chat-info{display:flex;flex-direction:column}
.chat-name{color:#fff;font-weight:700;font-size:15px;line-height:1.3}
.chat-status{color:rgba(255,255,255,.72);font-size:12px;display:flex;align-items:center;gap:5px}
.dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(46,197,126,.25)}
.chat-body{min-height:340px;max-height:400px;overflow-y:auto;padding:20px 16px;display:flex;flex-direction:column;gap:12px}
.msg{max-width:78%;padding:11px 15px;border-radius:16px;font-size:14px;line-height:1.65;animation:msgIn .35s ease}
.msg-ai{align-self:flex-start;background:#fff;color:var(--text);border-bottom-left-radius:5px}
.msg-user{align-self:flex-end;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border-bottom-right-radius:5px}
@keyframes msgIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.chat-input{display:flex;align-items:center;gap:10px;padding:12px 14px;background:rgba(255,255,255,.06);border-top:1px solid rgba(255,255,255,.08)}
.chat-input input{flex:1;min-width:0;border:0;outline:none;background:rgba(255,255,255,.10);color:#fff;border-radius:999px;padding:11px 16px;font-size:14px}
.chat-input input::placeholder{color:rgba(255,255,255,.55)}
.send-btn{width:44px;height:44px;flex-shrink:0;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;display:flex;align-items:center;justify-content:center;transition:transform .2s,opacity .2s}
.send-btn:hover{transform:scale(1.08)}
.send-btn svg{width:20px;height:20px}
.send-btn.disabled{background:#7A6B88;cursor:not-allowed;transform:none}

/* ===== 三步上手 ===== */
.steps{background:var(--bg-soft)}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step-card{padding:36px 30px;position:relative}
.step-num{font-size:42px;font-weight:900;color:var(--primary-soft);line-height:1;position:absolute;top:26px;right:26px}
.step-card h3{font-size:20px;font-weight:800;color:var(--deep);margin:18px 0 10px}
.step-card p{color:var(--muted);font-size:15px}

/* ===== 产品介绍 ===== */
.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.intro-text p{color:var(--text);margin:20px 0 26px;font-size:16px}
.check-list{display:flex;flex-direction:column;gap:14px}
.check-list li{display:flex;align-items:flex-start;gap:10px;font-weight:600;color:var(--deep);font-size:15px}
.check-list li::before{content:"";flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--primary-soft);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23F03D74' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E");background-size:14px;background-position:center;background-repeat:no-repeat}
.intro-img{width:100%;border-radius:var(--radius)}

/* ===== 核心功能 ===== */
.features{background:var(--bg)}
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feat-card{padding:30px 26px;display:flex;flex-direction:column}
.feat-icon{width:56px;height:56px;border-radius:16px;background:var(--primary-soft);color:var(--primary-deep);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.feat-icon svg{width:28px;height:28px}
.feat-card h3{font-size:19px;font-weight:800;color:var(--deep);margin-bottom:10px}
.pain{font-size:14px;color:var(--primary-deep);background:var(--primary-soft);border-radius:999px;padding:4px 12px;align-self:flex-start;margin-bottom:12px;font-weight:600}
.feat-desc{color:var(--muted);font-size:14px}

/* ===== 优势对比 ===== */
.compare{background:var(--bg-soft)}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius);background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow)}
.cmp-table{width:100%;min-width:640px;border-collapse:collapse;table-layout:fixed;font-size:14px}
.cmp-table th,.cmp-table td{padding:15px 18px;text-align:left;white-space:nowrap;border-bottom:1px solid var(--border);overflow:hidden;text-overflow:ellipsis}
.cmp-table th{background:var(--bg-soft);color:var(--deep);font-weight:800;font-size:15px}
.cmp-table td{color:var(--muted)}
.cmp-table tbody tr:last-child td{border-bottom:0}
.cmp-table .col-vig{background:var(--primary-soft);color:var(--primary-deep);font-weight:700}
.cmp-table th.col-vig{color:var(--deep)}
.cmp-table tbody tr:hover td{background:#FFF5F9}
.swipe-hint{display:none;color:var(--muted);font-size:13px;text-align:center;margin-top:14px}

/* ===== 使用场景 ===== */
.scenes{background:var(--bg)}
.scene-list{max-width:720px;margin:0 auto 56px;display:flex;flex-direction:column;gap:12px}
.scene-list li{display:flex;align-items:center;gap:12px;font-size:16px;color:var(--text);background:var(--card);border:1px solid var(--border);border-radius:14px;padding:13px 20px;box-shadow:var(--shadow)}
.scene-list li::before{content:"";flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--primary-soft);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23F03D74' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E");background-size:14px;background-position:center;background-repeat:no-repeat}
.vs-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:24px;align-items:stretch}
.vs-card{padding:34px 32px;display:flex;flex-direction:column;justify-content:center}
.vs-card h3{font-size:20px;font-weight:800;color:var(--deep);margin-bottom:18px}
.vs-card ul{display:flex;flex-direction:column;gap:10px}
.vs-card li{color:var(--muted);font-size:14px;position:relative;padding-left:18px}
.vs-card li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;background:var(--border)}
.vs-win{border-color:var(--primary);box-shadow:0 10px 30px rgba(240,61,116,.10)}
.vs-win h3{color:var(--primary-deep)}
.vs-win li{color:var(--text)}
.vs-win li::before{background:var(--primary)}
.vs-badge{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-weight:900;font-size:20px;display:flex;align-items:center;justify-content:center;align-self:center;box-shadow:var(--shadow-hover)}

/* ===== 数据 ===== */
.data{background:linear-gradient(150deg,#321F4E,#241639);color:#fff}
.data .sec-title{color:#fff}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:44px}
.data-item{text-align:center;padding:34px 20px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.10);border-radius:var(--radius)}
.num{display:block;font-size:44px;font-weight:900;background:linear-gradient(90deg,#FF9DBB,#FF5C8A);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.2}
.data-item span{color:rgba(255,255,255,.72);font-size:15px}

/* ===== 人设定制 ===== */
.custom{background:var(--bg-soft)}
.custom-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:center}
.custom-img{width:100%;border-radius:var(--radius)}
.custom-text .sec-title{text-align:left}
.custom-text p{color:var(--text);margin:20px 0 30px;font-size:16px}

/* ===== 用户评价 ===== */
.reviews{background:var(--bg)}
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{padding:28px 26px}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.review-avatar{width:44px;height:44px;border-radius:50%;background:var(--primary-soft);color:var(--primary-deep);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:17px}
.review-meta{display:flex;flex-direction:column}
.review-name{font-weight:700;color:var(--deep);font-size:15px}
.stars{color:var(--star);font-size:13px;letter-spacing:2px}
.review p{color:var(--muted);font-size:14px}

/* ===== 隐私安全 ===== */
.privacy{background:var(--bg-soft)}
.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.privacy-card{padding:30px 26px;text-align:center}
.privacy-icon{width:56px;height:56px;border-radius:16px;background:var(--primary-soft);color:var(--primary-deep);display:inline-flex;align-items:center;justify-content:center;margin-bottom:16px}
.privacy-icon svg{width:28px;height:28px}
.privacy-card h3{font-size:17px;font-weight:800;color:var(--deep);margin-bottom:10px}
.privacy-card p{color:var(--muted);font-size:14px}

/* ===== 版本更新 ===== */
.updates{background:var(--bg)}
.update-card{max-width:760px;margin:0 auto;padding:36px 38px}
.update-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:20px}
.update-ver{font-size:24px;font-weight:900;color:var(--primary-deep)}
.update-time{font-size:14px;color:var(--muted);background:var(--primary-soft);border-radius:999px;padding:5px 14px}
.update-list{display:flex;flex-direction:column;gap:12px}
.update-list li{color:var(--text);font-size:15px;padding-left:26px;position:relative}
.update-list li::before{content:"";position:absolute;left:0;top:7px;width:8px;height:8px;border-radius:2px;background:var(--primary);transform:rotate(45deg)}

/* ===== FAQ ===== */
.faq{background:var(--bg-soft)}
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{overflow:hidden}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;font-size:16px;font-weight:700;color:var(--deep);padding:20px 24px;min-height:56px}
.faq-arrow{flex-shrink:0;width:10px;height:10px;border-right:2px solid var(--primary);border-bottom:2px solid var(--primary);transform:rotate(45deg);transition:transform .3s}
.faq-item.open .faq-arrow{transform:rotate(225deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 24px 22px;color:var(--muted);font-size:15px}

/* ===== 下载区域 ===== */
.download{background:linear-gradient(150deg,#321F4E,#241639);text-align:center;color:#fff}
.download-title{font-size:38px;font-weight:900;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:12px}
.download-title .ver{font-size:17px;font-weight:700;color:#FF9DBB;border:1px solid rgba(255,157,187,.6);border-radius:999px;padding:4px 14px}
.download-meta{color:rgba(255,255,255,.75);font-size:14px;margin:16px 0 34px}
.download-btns{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
.download-tip{margin-top:26px;color:rgba(255,255,255,.85);font-size:15px}

/* ===== 页脚 ===== */
.footer{background:var(--deep);color:rgba(255,255,255,.7);text-align:center;padding:30px 20px;font-size:14px}
.footer-link{color:#FF9DBB;font-weight:700}

/* ===== 返回顶部 ===== */
.to-top{position:fixed;right:26px;bottom:30px;z-index:99;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-hover);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,transform .3s,visibility .3s}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{transform:translateY(-4px)}
.to-top svg{width:20px;height:20px}

/* ===== 响应式：≤1100px ===== */
@media (max-width:1100px){
  .hero-inner{gap:40px}
  .personas-grid{grid-template-columns:repeat(3,1fr);row-gap:22px}
  .features-grid,.privacy-grid{grid-template-columns:repeat(2,1fr)}
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .hero-title{font-size:38px}
  .sec-title{font-size:30px}
}

/* ===== 响应式：≤900px ===== */
@media (max-width:900px){
  .nav-menu{display:none}
  .hero{padding-top:44px}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-main{text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .personas-title{text-align:center}
  .intro-grid,.custom-grid{grid-template-columns:1fr;gap:40px}
  .custom-text .sec-title{text-align:center}
  .custom-text p{text-align:center}
  .custom-text .btn{margin:0 auto}
  .custom-text{text-align:center}
  .vs-grid{grid-template-columns:1fr}
  .vs-badge{align-self:center;margin:4px 0}
  .steps-grid{grid-template-columns:1fr;gap:18px}
}

/* ===== 响应式：≤768px ===== */
@media (max-width:768px){
  .wrap{padding:0 20px}
  .nav-inner{padding:0 20px}
  .section{padding:64px 0}
  .hero-inner{padding:0 20px}
  .cmp-table th,.cmp-table td{padding:13px 14px;font-size:13px}
  .swipe-hint{display:block}
  .download-btns{flex-direction:column;gap:14px}
  .download-btns .btn{width:100%;max-width:420px;margin:0 auto}
  .hero-download{width:100%;max-width:420px;margin:0 auto}
  .download-meta{font-size:12px;letter-spacing:.5px;white-space:nowrap}
  .sec-title{font-size:27px}
  .download-title{font-size:30px}
  .num{font-size:36px}
  .update-card{padding:28px 22px}
}

/* ===== 响应式：≤640px ===== */
@media (max-width:640px){
  .chat-body{min-height:280px}
  .chat-input input{font-size:16px}
  .features-grid,.reviews-grid,.privacy-grid{grid-template-columns:1fr}
  .personas-grid{grid-template-columns:repeat(3,1fr);gap:14px}
  .persona img{width:72px;height:72px}
  .hero-title{font-size:32px}
  .btn-lg{padding:14px 28px}
  .to-top{right:16px;bottom:20px}
  .hero{padding-top:32px}
}