*{margin:0;padding:0;box-sizing:border-box}
:root{
  --red:#e02222;
  --red-deep:#b3121a;
  --red-soft:#fff1f0;
  --red-line:#f7c9c6;
  --ink:#1f1414;
  --ink-2:#4a3a3a;
  --ink-3:#7a6a6a;
  --bg:#fff8f6;
  --card:#ffffff;
  --line:#f0dcd8;
  --radius:16px;
  --shadow:0 10px 30px rgba(180,20,20,.08);
}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(900px 500px at 88% -6%, rgba(224,34,34,.10), transparent 60%),
    radial-gradient(760px 460px at 4% 22%, rgba(224,34,34,.07), transparent 62%),
    radial-gradient(900px 600px at 60% 108%, rgba(224,34,34,.06), transparent 60%);
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
section{padding:64px 0;position:relative}
h2.sec-title{
  font-size:clamp(22px,3vw,32px);line-height:1.35;letter-spacing:.5px;
  display:flex;align-items:center;gap:12px;font-weight:800;color:var(--ink);
}
h2.sec-title::before{
  content:"";width:6px;height:26px;border-radius:3px;
  background:linear-gradient(180deg,var(--red),var(--red-deep));flex:none;
}
.sec-sub{color:var(--ink-3);font-size:15px;margin-top:10px;max-width:760px}
.sec-head{margin-bottom:36px}
/* ===== header ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,248,246,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;min-height:68px;
}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand .ai-page-logo{width:auto;height:38px;max-width:160px;object-fit:contain}
.brand-text strong{display:block;font-size:16px;letter-spacing:1px;color:var(--ink)}
.brand-text span{display:block;font-size:11px;color:var(--ink-3);letter-spacing:.5px}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;justify-content:flex-end}
.nav-links a{
  padding:8px 11px;font-size:14px;color:var(--ink-2);border-radius:8px;
  transition:color .2s,background .2s;white-space:nowrap;
}
.nav-links a:hover{color:var(--red);background:var(--red-soft)}
.nav-cta{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 18px;border-radius:999px;font-size:14px;font-weight:700;
  background:linear-gradient(135deg,var(--red),var(--red-deep));
  color:#fff;box-shadow:0 6px 18px rgba(224,34,34,.28);
  transition:transform .2s,box-shadow .2s;flex:none;white-space:nowrap;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(224,34,34,.36)}
.menu-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--red-line);
  border-radius:12px;background:#fff;cursor:pointer;flex-direction:column;
  align-items:center;justify-content:center;gap:5px;flex:none;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--red);border-radius:2px;transition:.25s}
.menu-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{
  display:none;border-top:1px solid var(--line);background:rgba(255,248,246,.98);
  padding:12px 20px 18px;
}
.mobile-panel.open{display:block;animation:fadeDown .3s ease}
.mobile-panel a{display:block;padding:10px 6px;font-size:15px;color:var(--ink-2);border-bottom:1px dashed var(--line)}
.mobile-panel a:last-child{border-bottom:none}
@keyframes fadeDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
/* ===== hero ===== */
.hero{padding:72px 0 60px;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:start}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:13px;font-weight:700;
  color:var(--red-deep);background:var(--red-soft);border:1px solid var(--red-line);
}
.eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--red);display:inline-block;animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(224,34,34,.5)}50%{box-shadow:0 0 0 6px rgba(224,34,34,0)}}
.hero h1{
  font-size:clamp(28px,4.2vw,46px);line-height:1.24;font-weight:900;
  letter-spacing:.5px;margin:20px 0 18px;color:var(--ink);
}
.hero h1 em{
  font-style:normal;color:var(--red-deep);position:relative;
  background:linear-gradient(180deg,transparent 68%,rgba(224,34,34,.18) 68%);
}
.hero p.lead{font-size:16px;color:var(--ink-2);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:12px;font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s;
}
.btn-primary{
  background:linear-gradient(135deg,var(--red),var(--red-deep));color:#fff;
  box-shadow:0 10px 26px rgba(224,34,34,.30);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 32px rgba(224,34,34,.38)}
.btn-ghost{background:#fff;color:var(--red-deep);border-color:var(--red-line)}
.btn-ghost:hover{transform:translateY(-3px);background:var(--red-soft)}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.hero-tags span{
  font-size:12.5px;color:var(--ink-2);background:#fff;border:1px solid var(--line);
  padding:5px 12px;border-radius:999px;
}
.hero-card{
  background:#fff;border:1px solid var(--line);border-radius:20px;
  padding:26px 24px;box-shadow:var(--shadow);position:relative;overflow:hidden;
  animation:floatIn .8s ease both;
}
.hero-card::before{
  content:"";position:absolute;top:-60px;right:-60px;width:170px;height:170px;
  border-radius:50%;background:radial-gradient(circle,rgba(224,34,34,.16),transparent 70%);
}
.hero-card h3{font-size:17px;margin-bottom:6px;color:var(--ink)}
.hero-card .mini-note{font-size:13px;color:var(--ink-3);margin-bottom:18px}
.model-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.model-grid span{
  font-size:12px;text-align:center;padding:7px 4px;border-radius:8px;
  background:var(--red-soft);color:var(--red-deep);border:1px solid var(--red-line);
  transition:transform .2s,background .2s;
}
.model-grid span:hover{transform:translateY(-2px);background:#ffe4e1}
.hero-card .hc-foot{
  margin-top:20px;padding-top:16px;border-top:1px dashed var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--ink-3);
}
.hc-foot strong{color:var(--red-deep);font-size:16px}
@keyframes floatIn{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
/* ===== stats ===== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:0 6px 18px rgba(180,20,20,.05);
  transition:transform .25s,box-shadow .25s;
}
.stat-card:hover{transform:translateY(-5px);box-shadow:0 14px 30px rgba(180,20,20,.12)}
.stat-card b{display:block;font-size:26px;color:var(--red-deep);line-height:1.2}
.stat-card span{font-size:13.5px;color:var(--ink-3)}
/* ===== about ===== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.about-text p{color:var(--ink-2);font-size:15px;margin-bottom:14px}
.about-list{display:grid;gap:10px;margin-top:8px}
.about-list li{
  display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--ink-2);
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;
}
.about-list li::before{
  content:"";width:8px;height:8px;border-radius:50%;background:var(--red);flex:none;margin-top:8px;
}
.about-media{display:grid;gap:16px}
.media-frame{
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  background:#fff;box-shadow:var(--shadow);
}
.media-frame img{width:100%;object-fit:cover}
.media-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
/* ===== services ===== */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.service-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:0 6px 18px rgba(180,20,20,.05);
  transition:transform .25s,box-shadow .25s,border-color .25s;display:flex;flex-direction:column;gap:10px;
}
.service-card:hover{transform:translateY(-6px);box-shadow:0 18px 36px rgba(180,20,20,.13);border-color:var(--red-line)}
.service-card .icon{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--red),var(--red-deep));color:#fff;font-weight:800;font-size:16px;
}
.service-card h3{font-size:17px;color:var(--ink)}
.service-card p{font-size:14px;color:var(--ink-3);flex:1}
.service-card .link{font-size:13.5px;font-weight:700;color:var(--red-deep)}
/* ===== flow ===== */
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.flow-step{
  background:#fff;border:1px dashed var(--red-line);border-radius:var(--radius);
  padding:22px 20px;position:relative;transition:transform .25s,box-shadow .25s;
}
.flow-step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.flow-step .num{
  font-size:13px;font-weight:800;color:#fff;background:var(--red);
  width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:12px;
}
.flow-step h3{font-size:16px;margin-bottom:6px}
.flow-step p{font-size:13.5px;color:var(--ink-3)}
/* ===== table ===== */
.table-scroll{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;min-width:640px}
th,td{padding:14px 16px;font-size:14px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--red-soft);color:var(--red-deep);font-weight:800;white-space:nowrap}
tbody tr:hover{background:#fffafa}
td:first-child{font-weight:700;color:var(--ink)}
.badge-star{color:#e02222;font-size:14px;letter-spacing:2px}
.score-box{
  display:flex;flex-wrap:wrap;gap:20px;align-items:center;
  background:linear-gradient(135deg,#fff2f0,#fff);border:1px solid var(--red-line);
  border-radius:var(--radius);padding:22px 24px;margin-bottom:22px;
}
.score-box .score{font-size:40px;font-weight:900;color:var(--red-deep);line-height:1}
.score-box .score small{font-size:15px;color:var(--ink-3);font-weight:600;margin-left:6px}
.score-box .score-txt{flex:1;min-width:220px;font-size:14px;color:var(--ink-2)}
/* ===== cases ===== */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column;
}
.case-card:hover{transform:translateY(-6px);box-shadow:0 18px 36px rgba(180,20,20,.13)}
.case-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--red-soft)}
.case-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.case-card:hover .thumb img{transform:scale(1.04)}
.case-card .body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.case-card h3{font-size:16px}
.case-card p{font-size:13.5px;color:var(--ink-3);flex:1}
.case-card .tag{font-size:12px;color:var(--red-deep);background:var(--red-soft);border:1px solid var(--red-line);padding:2px 10px;border-radius:999px;align-self:flex-start}
/* ===== reviews ===== */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;
  display:flex;flex-direction:column;gap:12px;transition:transform .25s,box-shadow .25s;
}
.review-card:hover{transform:translateY(-5px);box-shadow:0 16px 34px rgba(180,20,20,.12)}
.review-card .stars{color:#e02222;letter-spacing:2px;font-size:13px}
.review-card p{font-size:14px;color:var(--ink-2);flex:1}
.review-user{display:flex;align-items:center;gap:10px;padding-top:10px;border-top:1px dashed var(--line)}
.avatar{
  width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--red),var(--red-deep));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;flex:none;
}
.review-user b{font-size:14px;display:block}
.review-user span{font-size:12.5px;color:var(--ink-3)}
/* ===== token price ===== */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.price-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;
  position:relative;transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column;gap:12px;
}
.price-card.featured{border-color:var(--red);box-shadow:0 14px 34px rgba(224,34,34,.16)}
.price-card.featured::after{
  content:"推荐";position:absolute;top:16px;right:16px;font-size:12px;font-weight:700;
  color:#fff;background:var(--red);padding:3px 10px;border-radius:999px;
}
.price-card:hover{transform:translateY(-5px);box-shadow:0 18px 36px rgba(180,20,20,.14)}
.price-card h3{font-size:17px}
.price-card .p{font-size:28px;font-weight:900;color:var(--red-deep);line-height:1.2}
.price-card .p small{font-size:13px;color:var(--ink-3);font-weight:600;margin-left:4px}
.price-card ul{display:grid;gap:8px;margin-top:4px;flex:1}
.price-card ul li{font-size:13.5px;color:var(--ink-2);padding-left:18px;position:relative}
.price-card ul li::before{content:"";position:absolute;left:0;top:8px;width:7px;height:7px;border-radius:50%;background:var(--red)}
/* ===== network ===== */
.network-wrap{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
.tag-cloud{display:flex;flex-wrap:wrap;gap:9px}
.tag-cloud span{
  font-size:13px;padding:6px 14px;border-radius:999px;background:#fff;
  border:1px solid var(--line);color:var(--ink-2);transition:.2s;
}
.tag-cloud span:hover{background:var(--red-soft);border-color:var(--red-line);color:var(--red-deep);transform:translateY(-2px)}
.timeline{position:relative;padding-left:22px;display:grid;gap:18px}
.timeline::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;background:var(--red-line)}
.timeline-item{position:relative}
.timeline-item::before{content:"";position:absolute;left:-22px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--red);border:3px solid #fff;box-shadow:0 0 0 2px var(--red-line)}
.timeline-item b{font-size:15px;display:block;margin-bottom:2px}
.timeline-item p{font-size:13.5px;color:var(--ink-3)}
/* ===== faq ===== */
.faq-list{display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .2s}
.faq-item.open{border-color:var(--red-line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 18px;background:none;border:none;cursor:pointer;text-align:left;
  font-size:15px;font-weight:700;color:var(--ink);font-family:inherit;
}
.faq-q .plus{font-size:20px;color:var(--red);transition:transform .25s;flex:none;line-height:1}
.faq-item.open .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-a p{padding:0 18px 16px;font-size:14px;color:var(--ink-2)}
/* ===== form ===== */
.form-wrap{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.contact-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow);
}
.contact-card h3{font-size:18px;margin-bottom:14px}
.contact-list{display:grid;gap:12px}
.contact-list li{display:flex;gap:10px;font-size:14px;color:var(--ink-2);align-items:flex-start}
.contact-list li b{color:var(--ink);flex:none}
.qr{margin-top:18px;display:flex;align-items:center;gap:14px;padding-top:16px;border-top:1px dashed var(--line)}
.qr img{width:110px;border-radius:10px;border:1px solid var(--line)}
.qr span{font-size:13px;color:var(--ink-3)}
form{display:grid;gap:14px}
.field{display:grid;gap:6px}
.field label{font-size:13.5px;font-weight:700;color:var(--ink)}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;
  font-size:14px;font-family:inherit;color:var(--ink);background:#fff;transition:border-color .2s,box-shadow .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(224,34,34,.10);
}
.field textarea{min-height:110px;resize:vertical}
form .btn-primary{width:100%}
/* ===== articles & links ===== */
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.article-card{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 18px;
  transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column;gap:8px;
}
.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.article-card h3{font-size:15.5px;line-height:1.5}
.article-card span{font-size:12.5px;color:var(--ink-3)}
.friend-links{display:flex;flex-wrap:wrap;gap:10px}
.friend-links a{
  font-size:13px;padding:6px 14px;border-radius:999px;background:#fff;
  border:1px solid var(--line);color:var(--ink-2);transition:.2s;
}
.friend-links a:hover{color:var(--red-deep);border-color:var(--red-line);background:var(--red-soft)}
/* ===== footer ===== */
.site-footer{
  background:#2a1113;color:#f6e7e6;padding:44px 0 0;margin-top:8px;
}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:28px;padding-bottom:30px}
.footer-grid h4{font-size:15px;color:#fff;margin-bottom:14px;font-weight:800}
.footer-grid p,.footer-grid a{font-size:13.5px;color:#e7cfcd;line-height:1.9}
.footer-grid a:hover{color:#fff}
.footer-grid ul{display:grid;gap:4px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:16px 0;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:#d9bdba;
}
/* ===== float & back to top ===== */
.float-kefu{
  position:fixed;right:18px;bottom:86px;z-index:90;
  width:54px;height:54px;border-radius:50%;border:none;cursor:pointer;
  background:linear-gradient(135deg,var(--red),var(--red-deep));color:#fff;
  font-size:12px;font-weight:700;box-shadow:0 10px 24px rgba(224,34,34,.35);
  transition:transform .2s;
}
.float-kefu:hover{transform:scale(1.08)}
.kefu-pop{
  position:fixed;right:82px;bottom:86px;z-index:95;width:220px;
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;
  box-shadow:0 18px 40px rgba(80,20,20,.20);display:none;
}
.kefu-pop.open{display:block;animation:fadeDown .25s ease}
.kefu-pop img{width:100%;border-radius:10px;margin-bottom:8px}
.kefu-pop p{font-size:12.5px;color:var(--ink-2);text-align:center;line-height:1.6}
.back-top{
  position:fixed;right:18px;bottom:20px;z-index:90;width:54px;height:54px;border-radius:50%;
  border:1px solid var(--red-line);background:#fff;color:var(--red-deep);cursor:pointer;
  font-size:12px;font-weight:700;box-shadow:0 8px 20px rgba(180,20,20,.14);
  opacity:0;visibility:hidden;transition:.25s;
}
.back-top.show{opacity:1;visibility:visible}
/* ===== reveal ===== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
/* ===== responsive ===== */
@media(max-width:1024px){
  .nav-links{display:none}
  .menu-toggle{display:flex}
  .hero-inner{grid-template-columns:1fr}
  .about-grid,.network-wrap,.form-wrap{grid-template-columns:1fr}
  .service-grid,.case-grid,.review-grid,.price-grid,.article-grid{grid-template-columns:repeat(2,1fr)}
  .flow-grid,.stats{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  section{padding:48px 0}
  .hero{padding:52px 0 40px}
  .service-grid,.case-grid,.review-grid,.price-grid,.article-grid,.flow-grid,.stats,.media-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .nav-cta{padding:9px 14px;font-size:13px}
  .brand .ai-page-logo{height:32px}
  .float-kefu,.back-top{width:48px;height:48px;font-size:11px}
  .kefu-pop{right:74px;width:200px}
  .hero h1{font-size:26px}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}