:root{
  --red:#e0243c;
  --red-deep:#b3142a;
  --red-soft:#fff1f2;
  --ink:#221318;
  --ink-soft:#5c4348;
  --line:#f0dcdd;
  --paper:#fffaf8;
  --card:#ffffff;
  --shadow:0 10px 30px rgba(160,20,40,.08);
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  color:var(--ink);
  background:
    radial-gradient(circle at 12% 0%, #ffe9ec 0%, rgba(255,233,236,0) 45%),
    radial-gradient(circle at 88% 22%, #fff3ec 0%, rgba(255,243,236,0) 40%),
    linear-gradient(180deg,#fffaf8 0%,#fff5f3 55%,#fffaf8 100%);
  background-attachment:fixed;
  line-height:1.7;
  font-size:15px;
}
img{display:block;max-width:100%;height:auto;}
a{text-decoration:none;color:inherit;}
h1,h2,h3,h4{line-height:1.35;letter-spacing:.2px;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,250,248,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:12px 0;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand .ai-page-logo{width:auto;max-height:40px;}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:17px;color:var(--red-deep);letter-spacing:1px;}
.brand-text span{font-size:11px;color:var(--ink-soft);letter-spacing:2px;}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;}
.nav-links a{
  display:inline-block;padding:8px 12px;font-size:14px;color:var(--ink-soft);
  border-radius:8px;transition:color .25s,background .25s;
}
.nav-links a:hover{color:var(--red);background:var(--red-soft);}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:10px 20px;border-radius:999px;font-size:14px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:transform .2s,box-shadow .25s,background .25s,color .25s;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--red) 0%,var(--red-deep) 100%);
  color:#fff;box-shadow:0 8px 18px rgba(224,36,60,.28);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(224,36,60,.36);}
.btn-ghost{
  background:#fff;color:var(--red-deep);border-color:#f3c3c9;
}
.btn-ghost:hover{background:var(--red-soft);transform:translateY(-2px);}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:#fff;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--red-deep);border-radius:2px;transition:.3s;}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.active span:nth-child(2){opacity:0;}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- Hero ---------- */
.hero{padding:60px 0 56px;position:relative;overflow:hidden;}
.hero-shape{
  position:absolute;border-radius:50%;filter:blur(2px);opacity:.5;pointer-events:none;
  animation:floatY 9s ease-in-out infinite;
}
.hero-shape.s1{width:220px;height:220px;right:-60px;top:10px;background:radial-gradient(circle,#ffd0d6,transparent 70%);}
.hero-shape.s2{width:300px;height:300px;left:-120px;bottom:-80px;background:radial-gradient(circle,#ffe0c8,transparent 70%);animation-delay:-4s;}
@keyframes floatY{0%,100%{transform:translateY(0);}50%{transform:translateY(-18px);}}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;position:relative;z-index:2;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:999px;
  background:var(--red-soft);color:var(--red-deep);font-size:13px;font-weight:600;
  border:1px solid #f6cdd3;margin-bottom:20px;
}
.hero-tag::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--red);box-shadow:0 0 0 4px rgba(224,36,60,.12);}
.hero h1{
  font-size:clamp(28px,4vw,46px);font-weight:800;color:var(--ink);letter-spacing:.5px;
}
.hero h1 em{font-style:normal;color:var(--red);}
.hero-sub{margin-top:18px;color:var(--ink-soft);font-size:16px;max-width:540px;}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-note{margin-top:16px;font-size:13px;color:var(--ink-soft);}
.hero-note strong{color:var(--red-deep);}
.hero-panel{
  background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;
  box-shadow:var(--shadow);position:relative;
}
.hero-panel h2{font-size:15px;color:var(--ink-soft);font-weight:600;margin-bottom:16px;letter-spacing:1px;}
.hero-models{display:flex;flex-wrap:wrap;gap:8px;}
.hero-models span{
  font-size:12px;padding:6px 11px;border-radius:8px;background:var(--red-soft);color:var(--red-deep);
  font-weight:600;transition:transform .2s,background .25s;
}
.hero-models span:hover{transform:translateY(-2px);background:#ffe0e4;}
.hero-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:18px;}
.hero-metrics div{background:linear-gradient(135deg,#fff5f4,#fff);border:1px solid var(--line);border-radius:12px;padding:12px 14px;}
.hero-metrics b{display:block;font-size:20px;color:var(--red-deep);}
.hero-metrics small{font-size:12px;color:var(--ink-soft);}

/* ---------- 通用 section ---------- */
.section{padding:56px 0;position:relative;}
.section-head{max-width:760px;margin-bottom:34px;}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:3px;color:var(--red);
  text-transform:uppercase;margin-bottom:10px;
}
.section-head h2{font-size:clamp(22px,3vw,32px);font-weight:800;color:var(--ink);}
.section-head p{margin-top:12px;color:var(--ink-soft);font-size:15px;}

/* 数据指标 */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.stat-card{
  background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px;
  box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s;
  position:relative;overflow:hidden;
}
.stat-card::after{content:"";position:absolute;left:0;top:0;width:4px;height:100%;background:linear-gradient(180deg,var(--red),#ff8a9a);}
.stat-card:hover{transform:translateY(-5px);box-shadow:0 18px 34px rgba(160,20,40,.14);}
.stat-card b{display:block;font-size:26px;color:var(--red-deep);font-weight:800;}
.stat-card span{display:block;margin-top:6px;font-size:13px;color:var(--ink-soft);}

/* 能力卡片 */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.cap-card{
  background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px;
  box-shadow:var(--shadow);transition:transform .3s,border-color .3s,box-shadow .3s;
}
.cap-card:hover{transform:translateY(-6px);border-color:#f3b8c0;box-shadow:0 20px 36px rgba(160,20,40,.14);}
.cap-icon{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--red),#ff7d8f);color:#fff;font-weight:800;font-size:17px;margin-bottom:14px;
}
.cap-card h3{font-size:17px;color:var(--ink);margin-bottom:8px;}
.cap-card p{font-size:14px;color:var(--ink-soft);}

/* 场景标签云 */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;}
.tag-cloud span{
  padding:9px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);
  font-size:13px;color:var(--ink-soft);transition:.25s;cursor:default;
}
.tag-cloud span:hover{background:var(--red);color:#fff;border-color:var(--red);transform:translateY(-2px);}

/* 流程 */
.flow-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;}
.flow-item{
  background:linear-gradient(180deg,#fff,#fff6f5);border:1px solid var(--line);border-radius:16px;
  padding:20px;position:relative;transition:transform .3s;
}
.flow-item:hover{transform:translateY(-5px);}
.flow-item b{font-size:22px;color:#f5c2c8;font-weight:800;display:block;}
.flow-item h3{font-size:15px;margin:8px 0 6px;color:var(--ink);}
.flow-item p{font-size:13px;color:var(--ink-soft);}

/* 行业方案 */
.solution-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.solution-item{
  display:flex;gap:16px;background:var(--card);border:1px solid var(--line);
  border-radius:16px;padding:20px;box-shadow:var(--shadow);transition:transform .3s;
}
.solution-item:hover{transform:translateY(-4px);}
.solution-item .badge{
  flex-shrink:0;width:52px;height:52px;border-radius:14px;background:var(--red-soft);color:var(--red-deep);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;
}
.solution-item h3{font-size:16px;margin-bottom:6px;}
.solution-item p{font-size:13px;color:var(--ink-soft);}

/* 服务网络 / 时间线 */
.timeline{position:relative;padding-left:26px;}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--red),#ffd0d6);}
.timeline-item{position:relative;padding-bottom:22px;}
.timeline-item::before{
  content:"";position:absolute;left:-24px;top:6px;width:12px;height:12px;border-radius:50%;
  background:#fff;border:3px solid var(--red);
}
.timeline-item h3{font-size:16px;margin-bottom:4px;}
.timeline-item p{font-size:13px;color:var(--ink-soft);}

/* 对比表格 */
.table-wrap{overflow-x:auto;border-radius:16px;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff;}
table{width:100%;border-collapse:collapse;min-width:640px;font-size:14px;}
thead th{background:linear-gradient(135deg,var(--red),var(--red-deep));color:#fff;padding:14px 16px;text-align:left;font-weight:600;white-space:nowrap;}
tbody td{padding:13px 16px;border-top:1px solid var(--line);color:var(--ink-soft);}
tbody tr:nth-child(even){background:#fffaf9;}
tbody td:first-child{color:var(--ink);font-weight:600;}
.score{color:var(--red-deep);font-weight:800;}
.rating-box{
  display:flex;flex-wrap:wrap;align-items:center;gap:24px;background:#fff;border:1px solid var(--line);
  border-radius:16px;padding:22px;box-shadow:var(--shadow);margin-bottom:24px;
}
.rating-score{font-size:44px;font-weight:800;color:var(--red);line-height:1;}
.rating-score small{font-size:15px;color:var(--ink-soft);font-weight:500;}
.stars{color:#f7a600;font-size:20px;letter-spacing:2px;}
.rating-desc{font-size:13px;color:var(--ink-soft);}

/* Token 比价 */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.price-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;
  box-shadow:var(--shadow);transition:transform .3s,border-color .3s;
}
.price-card:hover{transform:translateY(-5px);border-color:#f3b8c0;}
.price-card h3{font-size:16px;margin-bottom:6px;}
.price-card .price{font-size:26px;font-weight:800;color:var(--red-deep);}
.price-card .price small{font-size:12px;color:var(--ink-soft);font-weight:400;}
.price-card ul{list-style:none;margin-top:14px;display:flex;flex-direction:column;gap:8px;}
.price-card li{font-size:13px;color:var(--ink-soft);padding-left:16px;position:relative;}
.price-card li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--red);}

/* 案例 */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.case-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;
  box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s;
}
.case-card:hover{transform:translateY(-5px);box-shadow:0 20px 36px rgba(160,20,40,.14);}
.case-thumb{overflow:hidden;background:#fff5f4;aspect-ratio:16/10;}
.case-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s;}
.case-card:hover .case-thumb img{transform:scale(1.05);}
.case-body{padding:18px;}
.case-body h3{font-size:16px;margin-bottom:6px;}
.case-body p{font-size:13px;color:var(--ink-soft);}

/* 评论 */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.review-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;
  box-shadow:var(--shadow);transition:transform .3s;
  display:flex;flex-direction:column;gap:12px;
}
.review-card:hover{transform:translateY(-5px);}
.review-text{font-size:14px;color:var(--ink-soft);flex:1;}
.review-user{display:flex;align-items:center;gap:12px;}
.avatar{
  width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--red),#ff8a9a);
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex-shrink:0;
}
.review-user b{display:block;font-size:14px;color:var(--ink);}
.review-user small{font-size:12px;color:var(--ink-soft);}

/* 文章 */
.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.article-item{
  display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;
  transition:transform .3s,border-color .3s;box-shadow:var(--shadow);
}
.article-item:hover{transform:translateY(-4px);border-color:#f3b8c0;}
.article-item .idx{font-size:20px;font-weight:800;color:#f5c2c8;line-height:1;}
.article-item h3{font-size:15px;margin-bottom:4px;}
.article-item p{font-size:13px;color:var(--ink-soft);}

/* 表单 */
.form-wrap{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:32px;align-items:start;
  background:linear-gradient(135deg,#fff6f5,#fff);border:1px solid var(--line);
  border-radius:22px;padding:32px;box-shadow:var(--shadow);
}
.contact-info h3{font-size:19px;margin-bottom:14px;}
.contact-info p{font-size:14px;color:var(--ink-soft);margin-bottom:18px;}
.contact-list{display:flex;flex-direction:column;gap:12px;}
.contact-list div{font-size:14px;color:var(--ink-soft);}
.contact-list b{color:var(--ink);}
.qr{margin-top:18px;width:120px;border-radius:12px;border:1px solid var(--line);padding:6px;background:#fff;}
.qr img{width:100%;}
form{display:flex;flex-direction:column;gap:14px;}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--ink);}
.field input,.field select,.field textarea{
  width:100%;padding:11px 14px;border-radius:10px;border:1px solid #ecd4d6;
  background:#fff;font-size:14px;color:var(--ink);font-family:inherit;transition:border-color .25s,box-shadow .25s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(224,36,60,.12);
}
.field textarea{resize:vertical;min-height:100px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;margin:0 auto;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .25s;}
.faq-item.open{border-color:#f0a9b3;}
.faq-q{
  width:100%;text-align:left;padding:18px 20px;background:none;border:none;cursor:pointer;
  font-size:15px;font-weight:600;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:14px;
  font-family:inherit;
}
.faq-q .icon{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--red-soft);color:var(--red-deep);
  display:flex;align-items:center;justify-content:center;font-size:15px;transition:transform .3s;}
.faq-item.open .faq-q .icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;font-size:14px;color:var(--ink-soft);}
.faq-a div{padding:0 20px 18px;}

/* 平台介绍 */
.intro-block{
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:32px;box-shadow:var(--shadow);
}
.intro-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:24px;}
.intro-item{padding-left:16px;border-left:3px solid #f6cdd3;}
.intro-item h3{font-size:16px;margin-bottom:6px;}
.intro-item p{font-size:14px;color:var(--ink-soft);}

/* CTA 条 */
.cta-bar{
  background:linear-gradient(135deg,var(--red),var(--red-deep));border-radius:22px;padding:38px 32px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  box-shadow:0 18px 40px rgba(160,20,40,.22);color:#fff;
}
.cta-bar h2{font-size:22px;color:#fff;}
.cta-bar p{font-size:14px;color:#ffe3e6;margin-top:6px;}
.cta-bar .btn-ghost{background:#fff;color:var(--red-deep);border-color:#fff;}

/* footer */
.site-footer{
  background:#2a1216;color:#e8cfd3;padding:44px 0 0;margin-top:20px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:28px;}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:14px;letter-spacing:1px;}
.site-footer p,.site-footer a{font-size:13px;color:#dcbcc1;}
.site-footer a:hover{color:#fff;}
.footer-links{display:flex;flex-direction:column;gap:8px;}
.footer-links a{display:inline-block;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:32px;padding:16px 0;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:12px;color:#c9a6ab;
}
.footer-bottom a{color:#e8cfd3;}

/* 浮动客服 */
.float-service{position:fixed;right:20px;bottom:24px;z-index:80;display:flex;flex-direction:column;gap:10px;align-items:flex-end;}
.float-btn{
  width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--red),var(--red-deep));color:#fff;font-size:13px;font-weight:700;
  box-shadow:0 10px 22px rgba(224,36,60,.35);cursor:pointer;border:none;transition:transform .25s;
}
.float-btn:hover{transform:translateY(-3px) scale(1.04);}
.float-pop{
  display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;width:180px;
  box-shadow:0 16px 34px rgba(0,0,0,.14);text-align:center;
}
.float-pop.show{display:block;animation:fadeUp .3s ease;}
.float-pop img{width:100%;border-radius:8px;margin-bottom:8px;}
.float-pop p{font-size:12px;color:var(--ink-soft);}
.to-top{
  width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--line);
  color:var(--red-deep);font-size:18px;display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.3s;
}
.to-top.show{opacity:1;visibility:visible;}

@keyframes fadeUp{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:translateY(0);}}
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease;}
.reveal.in{opacity:1;transform:translateY(0);}

/* 响应式 */
@media(max-width:992px){
  .hero-grid{grid-template-columns:1fr;gap:30px;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .cap-grid{grid-template-columns:repeat(2,1fr);}
  .flow-grid{grid-template-columns:repeat(2,1fr);}
  .solution-list{grid-template-columns:1fr;}
  .price-grid{grid-template-columns:1fr;}
  .case-grid{grid-template-columns:repeat(2,1fr);}
  .review-grid{grid-template-columns:repeat(2,1fr);}
  .article-list{grid-template-columns:1fr;}
  .form-wrap{grid-template-columns:1fr;padding:24px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .intro-grid{grid-template-columns:1fr;}
}
@media(max-width:768px){
  .nav-toggle{display:flex;}
  .nav-links{
    display:none;position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;background:#fff;
    border-bottom:1px solid var(--line);padding:10px 20px 16px;box-shadow:0 16px 24px rgba(0,0,0,.06);
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:11px 6px;border-bottom:1px solid #f8ebec;font-size:14px;}
  .nav-actions .btn-ghost{display:none;}
  .nav-inner{position:relative;}
  .section{padding:44px 0;}
  .stats-grid{grid-template-columns:1fr 1fr;}
  .cap-grid{grid-template-columns:1fr;}
  .flow-grid{grid-template-columns:1fr;}
  .case-grid{grid-template-columns:1fr;}
  .review-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-bar{padding:28px 22px;}
  .hero{padding:40px 0;}
  .hero-metrics{grid-template-columns:1fr 1fr;}
}
@media(max-width:420px){
  .stats-grid{grid-template-columns:1fr;}
  .hero-metrics{grid-template-columns:1fr;}
  .float-service{right:12px;bottom:16px;}
}