:root{
  --ink:#1b2230;
  --ink-soft:#4a5468;
  --paper:#fffdf6;
  --purple:#6a4cff;
  --pink:#ff5f8f;
  --yellow:#ffcb3d;
  --blue:#2aa8ff;
  --green:#14c48a;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth;scroll-padding-top:86px}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(circle at 6% 8%,rgba(255,203,61,.22),transparent 40%),
    radial-gradient(circle at 94% 5%,rgba(106,76,255,.16),transparent 38%),
    radial-gradient(circle at 86% 58%,rgba(42,168,255,.14),transparent 42%),
    radial-gradient(circle at 10% 86%,rgba(255,95,143,.14),transparent 44%);
  background-attachment:fixed;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.35;margin:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
.section{padding:clamp(44px,6vw,68px) 0}
.section-head{max-width:820px;margin-bottom:28px}
.section-head h2{font-size:clamp(22px,3.2vw,32px);margin:12px 0 10px;letter-spacing:.5px}
.section-head p{color:var(--ink-soft);font-size:15.5px}
.sticker{
  display:inline-block;
  padding:5px 14px;
  font-size:12.5px;
  font-weight:800;
  letter-spacing:.5px;
  border:2px solid var(--ink);
  border-radius:999px;
  background:var(--yellow);
  transform:rotate(-1.5deg);
  color:var(--ink);
}
.sticker-purple{background:#e9e3ff}
.sticker-pink{background:#ffe3ec}
.sticker-blue{background:#dff0ff}
.sticker-green{background:#dcf8ee}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  border-radius:14px;
  font-size:15px;
  font-weight:800;
  border:2px solid var(--ink);
  cursor:pointer;
  box-shadow:4px 4px 0 var(--ink);
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}
.btn-primary{background:var(--purple);color:#fff}
.btn-ghost{background:#fff;color:var(--ink)}
.btn-ghost:hover{background:var(--yellow)}
.btn-yellow{background:var(--yellow);color:var(--ink)}
.btn-pink{background:var(--pink);color:#fff}
.card{
  background:var(--paper);
  border:2px solid var(--ink);
  border-radius:18px;
  padding:20px;
  box-shadow:5px 5px 0 rgba(27,34,48,.16);
  transition:transform .25s ease,box-shadow .25s ease;
}
.card:hover{transform:translate(-2px,-2px);box-shadow:8px 8px 0 rgba(27,34,48,.2)}
.card h3{font-size:16.5px;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--ink-soft)}
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.reveal.in{animation:rise .6s ease both}
@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  .reveal.in{animation:none}
  html{scroll-behavior:auto}
  .btn,.card{transition:none}
}
/* header */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(255,253,246,.95);
  backdrop-filter:blur(10px);
  border-bottom:2px solid var(--ink);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:11px 0}
.brand{display:flex;align-items:center;gap:9px;font-weight:900;font-size:17px;color:var(--ink)}
.brand .ai-page-logo{width:auto;max-height:36px;border-radius:8px}
.nav-links{display:flex;align-items:center;flex-wrap:wrap;gap:0}
.nav-links a{
  padding:8px 10px;
  font-size:13.5px;
  font-weight:700;
  border-radius:10px;
  color:#2a3346;
  transition:background .18s ease,color .18s ease,transform .18s ease;
}
.nav-links a:hover{background:var(--yellow);color:var(--ink);transform:translateY(-1px)}
.nav-cta{padding:8px 16px;font-size:14px;box-shadow:3px 3px 0 var(--ink)}
.nav-toggle{
  display:none;
  align-items:center;
  gap:6px;
  padding:7px 14px;
  font-size:13.5px;
  font-weight:800;
  color:var(--paper);
  background:var(--ink);
  border:2px solid var(--ink);
  border-radius:12px;
  cursor:pointer;
}
/* hero */
.hero{position:relative;overflow:hidden;padding:clamp(40px,6vw,72px) 0 clamp(46px,6vw,78px)}
.hero::before{
  content:"";
  position:absolute;
  width:260px;height:260px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,203,61,.45),transparent 70%);
  top:-70px;right:4%;
  pointer-events:none;
}
.hero::after{
  content:"";
  position:absolute;
  width:220px;height:220px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(42,168,255,.3),transparent 70%);
  bottom:-80px;left:-40px;
  pointer-events:none;
}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:start}
.hero-copy h1{font-size:clamp(27px,4.2vw,44px);margin:16px 0 14px;letter-spacing:.5px}
.hero-lead{font-size:clamp(15px,1.6vw,17px);color:var(--ink-soft);max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.hero-points li{
  font-size:13.5px;
  font-weight:700;
  padding:6px 13px;
  border:2px solid var(--ink);
  border-radius:999px;
  background:#fff;
}
.hero-points li:nth-child(1){background:#e9e3ff}
.hero-points li:nth-child(2){background:#fff3cf}
.hero-points li:nth-child(3){background:#dcf8ee}
.hero-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.stat-card{
  background:#fff;
  border:2px solid var(--ink);
  border-radius:16px;
  padding:16px 16px 14px;
  box-shadow:4px 4px 0 rgba(27,34,48,.18);
  transition:transform .25s ease,box-shadow .25s ease;
}
.stat-card:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 rgba(27,34,48,.22)}
.stat-card strong{display:block;font-size:clamp(21px,2.6vw,27px);line-height:1.2}
.stat-card span{display:block;font-size:13px;color:var(--ink-soft);margin-top:4px}
.c-purple{border-top:7px solid var(--purple)}
.c-yellow{border-top:7px solid var(--yellow)}
.c-blue{border-top:7px solid var(--blue)}
.c-pink{border-top:7px solid var(--pink)}
/* about */
.about-lead{display:grid;gap:14px;margin-bottom:26px}
.about-lead p{font-size:15.5px;color:#333c4f}
.tile{padding:18px}
.tile h3{font-size:16px;margin-bottom:6px;display:flex;align-items:center;gap:8px}
.tile h3::before{content:"";width:10px;height:10px;border-radius:50%;background:var(--purple);border:2px solid var(--ink);flex:0 0 auto}
.tile:nth-child(2n) h3::before{background:var(--yellow)}
.tile:nth-child(3n) h3::before{background:var(--blue)}
.tile:nth-child(4n) h3::before{background:var(--pink)}
.tile p{font-size:14px;color:var(--ink-soft)}
/* tags */
.cloud{margin-top:30px}
.cloud h3{font-size:16px;margin-bottom:12px}
.tags{display:flex;flex-wrap:wrap;gap:9px}
.tags span{
  display:inline-block;
  padding:5px 13px;
  font-size:13px;
  font-weight:600;
  border:1.5px solid var(--ink);
  border-radius:999px;
  background:#fff;
  transition:transform .2s ease,background .2s ease;
}
.tags span:hover{transform:translateY(-2px)}
.tags span:nth-child(5n+1){background:#ffe9f0}
.tags span:nth-child(5n+2){background:#fff3cf}
.tags span:nth-child(5n+3){background:#e6f3ff}
.tags span:nth-child(5n+4){background:#e6fbf2}
.tags span:nth-child(5n+5){background:#efeaff}
/* steps */
.step{position:relative;padding-top:20px}
.step-no{
  display:inline-block;
  font-size:13px;
  font-weight:900;
  padding:3px 11px;
  border:2px solid var(--ink);
  border-radius:10px;
  background:var(--yellow);
  transform:rotate(-2deg);
}
.step:nth-child(2n) .step-no{background:#dff0ff}
.step:nth-child(3n) .step-no{background:#ffe3ec}
.step h3{font-size:16.5px;margin:12px 0 6px}
.step p{font-size:14px;color:var(--ink-soft)}
/* case */
.case-card{overflow:hidden;padding:0}
.case-media{
  background:#f4f0e5;
  border-bottom:2px solid var(--ink);
  aspect-ratio:16/10;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:8px;
}
.case-media img{width:100%;height:100%;object-fit:contain}
.case-body{padding:16px 18px 18px}
.case-tag{
  display:inline-block;
  font-size:12px;
  font-weight:800;
  padding:3px 10px;
  border:1.5px solid var(--ink);
  border-radius:999px;
  background:#e9e3ff;
  margin-bottom:8px;
}
.case-body h3{font-size:16px;margin-bottom:6px}
.case-body p{font-size:14px;color:var(--ink-soft)}
/* table */
.table-wrap{
  overflow-x:auto;
  border:2px solid var(--ink);
  border-radius:18px;
  background:#fff;
  box-shadow:5px 5px 0 rgba(27,34,48,.16);
}
table.compare-table{width:100%;border-collapse:collapse;min-width:640px;font-size:14.5px}
table.compare-table th,
table.compare-table td{padding:13px 16px;text-align:left;border-bottom:1.5px solid rgba(27,34,48,.14)}
table.compare-table th{background:#f5f1e4;font-weight:800;font-size:14px;white-space:nowrap}
table.compare-table tr:last-child td{border-bottom:none}
table.compare-table td:first-child{font-weight:700}
table.compare-table td strong{color:var(--purple)}
/* score */
.score-card{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:18px;
  padding:20px 24px;
  margin-bottom:22px;
  border:2px solid var(--ink);
  border-radius:18px;
  background:linear-gradient(120deg,#efeaff 0%,#fff7dc 55%,#e6f3ff 100%);
  box-shadow:5px 5px 0 rgba(27,34,48,.16);
}
.score-value{display:flex;align-items:baseline;gap:6px}
.score-value strong{font-size:42px;line-height:1;letter-spacing:-1px}
.score-value span{font-size:16px;font-weight:700;color:var(--ink-soft)}
.score-stars{font-size:20px;letter-spacing:3px;color:#f5a524}
.score-text{font-size:14.5px;font-weight:700}
.score-text small{display:block;font-weight:500;font-size:13.5px;color:var(--ink-soft);margin-top:2px}
/* quotes */
.quote-card{display:flex;flex-direction:column;gap:12px;padding:20px}
.quote-stars{font-size:15px;letter-spacing:2px;color:#f5a524}
.quote-text{font-size:14.5px;color:#333c4f}
.quote-user{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:6px}
.avatar{
  width:38px;height:38px;
  flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:2px solid var(--ink);
  background:var(--yellow);
  font-weight:900;
  font-size:15px;
}
.quote-card:nth-child(2n) .avatar{background:#dff0ff}
.quote-card:nth-child(3n) .avatar{background:#ffe3ec}
.quote-card:nth-child(4n) .avatar{background:#dcf8ee}
.quote-user strong{display:block;font-size:14.5px}
.quote-user small{display:block;font-size:12.5px;color:var(--ink-soft)}
/* form */
.match-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:22px;align-items:start}
.form-card{padding:22px}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:800}
.field input,.field select,.field textarea{
  width:100%;
  font-family:inherit;
  font-size:15px;
  color:var(--ink);
  padding:11px 14px;
  border:2px solid var(--ink);
  border-radius:12px;
  background:#fff;
  transition:box-shadow .2s ease;
}
.field textarea{min-height:112px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;box-shadow:0 0 0 4px rgba(106,76,255,.22)}
.form-submit{margin-top:18px}
.form-submit .btn{width:100%}
.form-tip{font-size:12.5px;color:var(--ink-soft);margin-top:10px}
.contact-card{padding:22px;display:grid;gap:14px}
.contact-card h3{font-size:16.5px}
.qr-box{
  border:2px dashed rgba(27,34,48,.35);
  border-radius:14px;
  padding:12px;
  background:#fff;
  display:flex;
  justify-content:center;
}
.qr-box img{width:150px;height:auto;border-radius:8px}
.contact-list{display:grid;gap:10px;font-size:14px}
.contact-list li{display:flex;flex-wrap:wrap;gap:6px}
.contact-list strong{font-weight:800}
.contact-list span{color:var(--ink-soft);word-break:break-all}
/* faq */
.faq-list{display:grid;gap:12px}
.faq-item{border:2px solid var(--ink);border-radius:16px;background:#fff;overflow:hidden;box-shadow:4px 4px 0 rgba(27,34,48,.14)}
.faq-item.open{background:#fffdf6}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:15px 18px;
  font-family:inherit;
  font-size:15px;
  font-weight:800;
  color:var(--ink);
  background:transparent;
  border:none;
  text-align:left;
  cursor:pointer;
}
.faq-icon{
  flex:0 0 auto;
  width:24px;height:24px;
  display:flex;align-items:center;justify-content:center;
  border:2px solid var(--ink);
  border-radius:50%;
  font-size:15px;
  line-height:1;
  background:var(--yellow);
  transition:transform .25s ease,background .25s ease;
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--pink);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 18px 16px;font-size:14.5px;color:var(--ink-soft)}
/* article */
.article-card{display:flex;flex-direction:column;gap:10px;padding:18px}
.article-card h3{font-size:15.5px;line-height:1.55}
.article-card .article-meta{font-size:12.5px;color:var(--ink-soft)}
.article-card a.more{font-size:13.5px;font-weight:800;color:var(--purple);border-bottom:2px solid rgba(106,76,255,.35);align-self:flex-start}
.article-card a.more:hover{border-bottom-color:var(--purple)}
/* join */
.join-banner{
  display:grid;
  grid-template-columns:1.4fr .6fr;
  gap:22px;
  align-items:center;
  padding:clamp(22px,3.5vw,34px);
  border:2px solid var(--ink);
  border-radius:22px;
  background:linear-gradient(120deg,#fff7dc,#e6f3ff 60%,#efeaff);
  box-shadow:6px 6px 0 rgba(27,34,48,.16);
}
.join-banner h2{font-size:clamp(21px,2.8vw,28px);margin-bottom:10px}
.join-banner p{font-size:14.5px;color:#333c4f}
.join-points{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}
.join-points li{font-size:13px;font-weight:700;padding:5px 12px;border:1.5px solid var(--ink);border-radius:999px;background:#fff}
.join-actions{display:flex;flex-direction:column;gap:12px}
.join-actions .btn{width:100%}
/* footer */
.site-footer{background:#1b2230;color:#f4f1e6;margin-top:8px;padding:38px 0 22px}
.footer-top{display:grid;grid-template-columns:1.1fr 1.2fr .8fr;gap:26px}
.footer-brand strong{display:block;font-size:18px;margin-bottom:8px;color:#fffdf6}
.footer-brand p{font-size:13.5px;color:#c8cedd;margin-bottom:6px}
.footer-brand .ai-page-home-link{color:var(--yellow);font-weight:800;border-bottom:1.5px solid rgba(255,203,61,.5)}
.footer-links h3,.footer-contact h3{font-size:15px;margin-bottom:12px;color:#fffdf6}
.link-row{display:flex;flex-wrap:wrap;gap:8px}
.link-row a{
  font-size:13px;
  padding:4px 11px;
  border-radius:999px;
  border:1.5px solid rgba(244,241,230,.35);
  color:#efeaff;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.link-row a:hover{background:var(--yellow);color:#1b2230;border-color:var(--yellow)}
.footer-contact p{font-size:13.5px;color:#c8cedd;margin-bottom:6px}
.footer-contact a{color:var(--yellow)}
.footer-bottom{
  margin-top:26px;
  padding-top:16px;
  border-top:1.5px solid rgba(244,241,230,.18);
  font-size:12.5px;
  color:#a9b1c4;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  justify-content:space-between;
}
/* floating */
.float-btn{
  position:fixed;
  right:18px;
  z-index:70;
  width:52px;height:52px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  border:2px solid var(--ink);
  background:#fff;
  font-size:13px;
  font-weight:900;
  cursor:pointer;
  box-shadow:4px 4px 0 rgba(27,34,48,.35);
  transition:transform .2s ease,opacity .25s ease,visibility .25s ease;
}
.float-btn:hover{transform:translate(-2px,-2px)}
.float-kefu{bottom:88px;background:var(--purple);color:#fff;border-color:var(--ink)}
.float-top{bottom:24px;opacity:0;visibility:hidden;color:var(--ink)}
.float-top.show{opacity:1;visibility:visible}
@media (max-width:1024px){
  .nav-links{
    display:none;
    position:absolute;
    left:0;right:0;top:100%;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:8px 20px 16px;
    background:#fffdf6;
    border-bottom:2px solid var(--ink);
    box-shadow:0 10px 20px rgba(27,34,48,.12);
  }
  .site-header.open .nav-links{display:flex}
  .nav-links a{padding:11px 8px;font-size:14.5px;border-bottom:1.5px solid rgba(27,34,48,.12);border-radius:0}
  .nav-links a:last-child{border-bottom:none}
  .nav-toggle{display:inline-flex}
  .nav-cta{display:none}
  .hero-inner{grid-template-columns:1fr;gap:28px}
  .match-grid{grid-template-columns:1fr}
  .join-banner{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:620px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-top{grid-template-columns:1fr}
  .score-card{padding:18px}
  .score-value strong{font-size:34px}
  .float-btn{width:46px;height:46px;font-size:12px;right:14px}
  .float-kefu{bottom:78px}
  .float-top{bottom:20px}
}