/* ========== viggleai 无限词版 官网样式 ========== */
: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:#FFB800;
  --radius:18px;
  --shadow:0 10px 30px rgba(240,61,116,.08);
  --shadow-hover:0 18px 42px rgba(240,61,116,.16);
  --nav-h:70px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 8px)}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
button{font:inherit;border:none;background:none;cursor:pointer}
.hero-grid>*,.step-grid>*,.intro-grid>*,.feat-grid>*,.custom-grid>*,.review-grid>*,.privacy-grid>*,.data-grid>*,.vs-wrap>*,.scene-check>*,.persona-grid>*{min-width:0}
:focus-visible{outline:3px solid var(--primary);outline-offset:2px;border-radius:6px}
::selection{background:var(--primary-soft);color:var(--primary-deep)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:84px 0}
.section.bg-soft{background:var(--bg-soft)}
.section-head{text-align:center;max-width:720px;margin:0 auto 48px}
.section-tag{display:inline-block;padding:6px 16px;border-radius:999px;background:var(--primary-soft);color:var(--primary-deep);font-size:13px;font-weight:600;margin-bottom:14px}
.section-title{font-size:clamp(26px,3.4vw,38px);color:var(--deep);line-height:1.35;font-weight:800}
.section-sub{color:var(--muted);margin-top:12px;font-size:16px}
/* 通用卡片 */
.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)}
/* 按钮 */
.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;padding:14px 34px;font-size:16px;font-weight:600;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.btn:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.btn-lg{padding:16px 40px;font-size:17px}
.btn-sm{padding:7px 18px;font-size:13px;min-height:32px}

/* ========== 1 顶部导航 ========== */
.header{position:fixed;inset:0 0 auto;height:var(--nav-h);background:rgba(255,249,251,.9);backdrop-filter:blur(12px);z-index:100;transition:box-shadow .25s}
.header.scrolled{box-shadow:0 6px 24px rgba(42,26,61,.08)}
.header-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:flex;align-items:center;gap:9px;font-size:22px;font-weight:800;color:var(--deep);white-space:nowrap}
.logo-mark{width:32px;height:32px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--primary-deep));display:grid;place-items:center;color:#fff;flex-shrink:0}
.nav-menu{display:flex;gap:26px;align-items:center}
.nav-menu a{color:var(--text);font-size:15px;font-weight:500;transition:color .2s}
.nav-menu a:hover{color:var(--primary)}
.nav-dl{white-space:nowrap}

/* ========== 2 首屏 Hero ========== */
.hero{padding:calc(var(--nav-h) + 56px) 0 72px;background:linear-gradient(180deg,var(--bg-soft),var(--bg));position:relative;overflow:hidden}
.hero-blob{position:absolute;border-radius:50%;filter:blur(64px);opacity:.45;pointer-events:none}
.hero-blob.b1{width:420px;height:420px;background:var(--primary-soft);top:-140px;right:-120px}
.hero-blob.b2{width:360px;height:360px;background:#F3E3FF;bottom:-120px;left:-120px}
.hero-grid{position:relative;display:grid;grid-template-columns:1.06fr .94fr;gap:52px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:999px;background:var(--card);border:1px solid var(--border);color:var(--primary-deep);font-size:14px;font-weight:600;box-shadow:var(--shadow)}
.hero-tag .dot{width:8px;height:8px;border-radius:50%;background:var(--green)}
.hero-title{font-size:clamp(30px,4.4vw,50px);line-height:1.28;color:var(--deep);font-weight:800;margin:20px 0 6px}
.hero-title .hl{background:linear-gradient(90deg,var(--primary),var(--primary-deep));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-ver{display:inline-block;margin-left:10px;vertical-align:middle;padding:4px 14px;border-radius:999px;background:var(--deep);color:#fff;font-size:14px;font-weight:700}
.hero-desc{color:var(--muted);font-size:17px;max-width:520px;margin:14px 0 26px}
.hero-dl{display:inline-flex}
/* 聊天窗口 */
.chat{background:var(--card);border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow-hover);overflow:hidden;max-width:400px;width:100%;margin-left:auto}
.chat-head{display:flex;align-items:center;gap:12px;padding:13px 16px;background:linear-gradient(90deg,var(--primary),var(--primary-deep))}
.chat-avatar{width:46px;height:46px;border-radius:50%;border:2px solid #fff;object-fit:cover;flex-shrink:0}
.chat-id{flex:1;min-width:0}
.chat-name{color:#fff;font-size:16px;font-weight:700;line-height:1.3}
.chat-status{color:rgba(255,255,255,.92);font-size:12px;display:flex;align-items:center;gap:5px}
.chat-status .dot{width:7px;height:7px;border-radius:50%;background:#8AFFC7;box-shadow:0 0 6px #8AFFC7}
.chat-msgs{height:292px;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px;background:var(--bg)}
.msg{max-width:82%;padding:10px 14px;border-radius:15px;font-size:14px;line-height:1.65;white-space:pre-wrap;word-break:break-word}
.msg-ai{align-self:flex-start;background:var(--card);border:1px solid var(--border);border-top-left-radius:5px}
.msg-user{align-self:flex-end;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;border-top-right-radius:5px;box-shadow:var(--shadow)}
.chat-input{display:flex;align-items:center;gap:10px;padding:12px;background:var(--card);border-top:1px solid var(--border)}
.chat-input input{flex:1;min-width:0;height:44px;padding:0 18px;border:1px solid var(--border);border-radius:999px;background:var(--bg);color:var(--text);font-size:14px;outline:none;transition:border-color .2s}
.chat-input input:focus{border-color:var(--primary)}
.chat-send{width:44px;height:44px;border-radius:50%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;display:grid;place-items:center;flex-shrink:0;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.chat-send:hover{transform:scale(1.06);box-shadow:var(--shadow-hover)}
.chat-send:disabled{background:#E8DDEB;color:#B9AEC6;box-shadow:none;cursor:not-allowed;transform:none}
/* 人设 */
.persona-grid{position:relative;display:grid;grid-template-columns:repeat(6,1fr);gap:16px;margin-top:28px}
.persona-head{margin-top:32px}
.persona{padding:14px 10px 12px;text-align:center}
.persona img{width:100%;aspect-ratio:1;border-radius:16px;object-fit:cover}
.persona-name{margin-top:10px;font-size:15px;font-weight:600;color:var(--deep)}
.persona-tag{display:inline-block;margin-top:6px;padding:2px 10px;background:var(--primary-soft);color:var(--primary-deep);font-size:12px;font-weight:500;border-radius:999px}
.persona-desc{margin:8px 0 0;font-size:12.5px;line-height:1.6;color:var(--muted)}
.persona-custom{border-style:dashed;border-color:var(--primary)}
.persona-custom .persona-name{color:var(--primary-deep)}

/* ========== 3 三步上手 ========== */
.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{padding:32px 26px;text-align:center}
.step-ico{width:60px;height:60px;margin:0 auto 18px;border-radius:18px;background:var(--primary-soft);color:var(--primary-deep);display:grid;place-items:center}
.step h3{font-size:19px;color:var(--deep);margin-bottom:10px}
.step p{color:var(--muted);font-size:15px}
.step-no{width:30px;height:30px;margin:0 auto 12px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:14px;font-weight:700;display:grid;place-items:center}

/* ========== 4 产品介绍 ========== */
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.intro-img{width:100%;border-radius:24px;box-shadow:var(--shadow-hover)}
.intro h3{font-size:22px;color:var(--deep);margin-bottom:14px}
.intro p{color:var(--muted);margin-bottom:18px}
.check-list{display:grid;gap:12px}
.check-item{display:flex;align-items:flex-start;gap:12px;padding:14px 18px}
.check-item .ck{width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;display:grid;place-items:center;flex-shrink:0;margin-top:2px}
.check-item span{font-size:15px;font-weight:600;color:var(--deep)}

/* ========== 5 四大核心功能 ========== */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feat{padding:30px 24px}
.feat-ico{width:54px;height:54px;border-radius:16px;background:var(--primary-soft);color:var(--primary-deep);display:grid;place-items:center;margin-bottom:18px}
.feat h3{font-size:18px;color:var(--deep);margin-bottom:6px}
.feat .pain{display:inline-block;font-size:12px;color:var(--primary-deep);background:var(--primary-soft);padding:3px 10px;border-radius:999px;margin-bottom:10px}
.feat p{color:var(--muted);font-size:14px}

/* ========== 6 优势对比 ========== */
.compare-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius);background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow)}
.compare-table{width:100%;border-collapse:collapse;min-width:640px}
.compare-table th,.compare-table td{padding:15px 16px;border-bottom:1px solid var(--border);text-align:center;font-size:14px;vertical-align:middle}
.compare-table th{background:var(--bg-soft);color:var(--deep);font-size:15px;font-weight:700}
.compare-table th:first-child,.compare-table td:first-child{text-align:left;font-weight:600;color:var(--deep);white-space:nowrap}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table .hl{border-left:2px solid var(--primary);border-right:2px solid var(--primary);background:var(--primary-soft);color:var(--primary-deep);font-weight:600}
.compare-table th.hl{background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff}
.compare-table td.dim{color:var(--muted)}
.compare-table td.vig{color:var(--primary-deep);font-weight:600}
.swipe-hint{display:none;text-align:center;color:var(--muted);font-size:13px;margin-top:12px}
.swipe-hint svg{vertical-align:-2px;margin-right:4px}

/* ========== 7 使用场景 ========== */
.scene-check{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:56px}
.check-line{display:flex;align-items:flex-start;gap:10px;padding:14px 18px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.check-line .ck{width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;display:grid;place-items:center;flex-shrink:0;margin-top:3px}
.check-line span{font-size:15px;color:var(--deep);font-weight:500}
.vs-wrap{display:grid;grid-template-columns:1fr auto 1fr;gap:0;align-items:stretch}
.vs-card{padding:30px 28px;text-align:center;position:relative}
.vs-card h3{font-size:18px;margin-bottom:16px}
.vs-card ul{display:grid;gap:10px;text-align:left}
.vs-card li{font-size:14px;color:var(--muted);padding-left:24px;position:relative}
.vs-card li::before{position:absolute;left:0;top:0}
.vs-card.bad li::before{content:"✕";color:#E05C6E;font-weight:700}
.vs-card.good li::before{content:"✓";color:var(--green);font-weight:700}
.vs-card.bad h3{color:#9B8AA8}
.vs-card.good h3{color:var(--green)}
.vs-card.good{border:2px solid var(--primary);background:linear-gradient(180deg,#FFFFFF,var(--primary-soft));box-shadow:var(--shadow-hover)}
.vs-tag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);padding:5px 18px;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--primary-deep));color:#fff;font-size:12.5px;font-weight:700;white-space:nowrap;box-shadow:var(--shadow)}
.vs-badge{width:66px;height:66px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:18px;font-weight:800;display:grid;place-items:center;margin:auto 22px;box-shadow:var(--shadow-hover);flex-shrink:0}

/* ========== 8 数据模块 ========== */
.data{background:linear-gradient(135deg,var(--deep),#43255E);color:#fff}
.data .section-title{color:#fff}
.data .section-sub{color:rgba(255,255,255,.72)}
.data .section-tag{background:rgba(255,255,255,.14);color:#FFD3E3}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.data-num{font-size:clamp(34px,4.4vw,50px);font-weight:800;color:#fff;line-height:1.2}
.data-num .suf{color:var(--primary);font-size:.58em}
.data-label{color:rgba(255,255,255,.75);font-size:15px;margin-top:8px}

/* ========== 9 人设定制 ========== */
.custom-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.custom-img{width:100%;border-radius:24px;box-shadow:var(--shadow-hover)}
.custom h3{font-size:22px;color:var(--deep);margin-bottom:14px}
.custom p{color:var(--muted);margin-bottom:22px}
.custom-list{display:grid;gap:12px;margin-bottom:28px}
.custom-list li{display:flex;align-items:center;gap:10px;font-size:15px;color:var(--deep);font-weight:500}
.custom-list .ck{width:20px;height:20px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;display:grid;place-items:center;flex-shrink:0}

/* ========== 10 用户评价 ========== */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review{padding:26px 24px}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.review-avatar{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;display:grid;place-items:center;font-size:18px;font-weight:700;flex-shrink:0}
.review-id{font-size:15px;font-weight:700;color:var(--deep);line-height:1.3}
.review-stars{color:var(--star);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:22px}
.privacy{padding:30px 24px;text-align:center}
.privacy-ico{width:56px;height:56px;margin:0 auto 16px;border-radius:16px;background:var(--primary-soft);color:var(--primary-deep);display:grid;place-items:center}
.privacy h3{font-size:17px;color:var(--deep);margin-bottom:8px}
.privacy p{color:var(--muted);font-size:14px}

/* ========== 12 版本更新 ========== */
.update-card{max-width:720px;margin:0 auto;padding:38px 40px}
.update-top{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding-bottom:20px;border-bottom:1px solid var(--border);margin-bottom:20px}
.update-ver{font-size:30px;font-weight:800;color:var(--primary-deep)}
.update-badge{padding:6px 14px;border-radius:999px;background:var(--primary-soft);color:var(--primary-deep);font-size:13px;font-weight:600}
.update-date{color:var(--muted);font-size:14px;margin-left:auto}
.update-list li{position:relative;padding:9px 0 9px 26px;color:var(--text);font-size:15px}
.update-list li::before{content:"";position:absolute;left:6px;top:17px;width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep))}

/* ========== 13 FAQ ========== */
.faq-list{max-width:760px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:14px;overflow:hidden}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:19px 22px;font-size:16px;font-weight:600;color:var(--deep);text-align:left;min-height:54px}
.faq-q .ico{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--primary-soft);color:var(--primary-deep);display:grid;place-items:center;transition:transform .3s}
.faq-item.open .faq-q .ico{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 22px 20px;color:var(--muted);font-size:15px}

/* ========== 14 下载区域 ========== */
.download{text-align:center;position:relative;overflow:hidden}
.download .hero-blob.b3{width:340px;height:340px;background:var(--primary-soft);bottom:-160px;left:50%;transform:translateX(-50%)}
.dl-ver{margin:10px 0 4px}
.dl-meta{color:var(--muted);font-size:14px;margin:6px 0 28px}
.dl-btns{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;position:relative}
.dl-btns .btn{min-width:240px}
.dl-tip{margin-top:26px;color:var(--muted);font-size:14px;position:relative}

/* ========== 15 页脚 ========== */
.footer{background:var(--deep);color:rgba(255,255,255,.72);text-align:center;padding:30px 20px;font-size:14px}
.footer a{color:#fff;font-weight:600;transition:color .2s}
.footer a:hover{color:var(--primary)}
.footer .ft-line{margin-top:6px;color:rgba(255,255,255,.5);font-size:13px}

/* ========== 16 返回顶部 ========== */
.backtop{position:fixed;right:24px;bottom:32px;width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;display:grid;place-items:center;box-shadow:var(--shadow-hover);opacity:0;visibility:hidden;transform:translateY(14px);transition:opacity .3s,transform .3s,visibility .3s;z-index:99}
.backtop.show{opacity:1;visibility:visible;transform:none}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.card,.btn,.chat-send,.faq-q .ico,.backtop{transition:none}}

/* ========== 响应式 ========== */
@media (max-width:1100px){
  .persona-grid{grid-template-columns:repeat(3,1fr)}
  .feat-grid,.privacy-grid,.data-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .hero-title{font-size:clamp(28px,3.8vw,42px)}
  .nav-menu{gap:18px}
}
@media (max-width:900px){
  .nav-menu{display:none}
  .hero{padding-top:calc(var(--nav-h) + 40px)}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .persona-head{margin-top:48px}
  .chat{margin:0 auto;max-width:420px}
  .step-grid{grid-template-columns:1fr}
  .intro-grid,.custom-grid{grid-template-columns:1fr;gap:40px}
  .intro-img,.custom-img{width:100%;max-width:520px;margin:0 auto}
  .scene-check{grid-template-columns:1fr}
  .vs-wrap{grid-template-columns:1fr;gap:26px}
  .vs-badge{margin:0 auto}
  .section{padding:64px 0}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .logo{min-height:44px}
  .nav-dl{min-height:44px}
  .hero-dl{width:100%}
  .custom .btn{display:table;margin:0 auto}
  .compare-table{min-width:640px}
  .swipe-hint{display:block}
  .dl-btns{flex-direction:column;align-items:stretch}
  .dl-btns .btn{width:100%}
  .dl-meta{font-size:12px;white-space:nowrap}
  .backtop{right:16px;bottom:20px}
  .update-card{padding:28px 22px}
  .update-date{margin-left:0;width:100%}
  .faq-q{padding:16px 16px;font-size:15px}
  .faq-a-inner{padding:0 16px 16px}
}
@media (max-width:640px){
  .feat-grid,.review-grid,.privacy-grid{grid-template-columns:1fr}
  .chat-msgs{height:236px}
  .hero-desc{font-size:15.5px}
  .btn-lg{padding:14px 28px;font-size:16px}
  .persona-grid{gap:12px}
  .persona{padding:10px 8px}
}