:root{
  --ink:#16182f;
  --ink-2:#4a4f6b;
  --ink-3:#6d7288;
  --brand:#5b4bff;
  --brand-2:#21b6ff;
  --line:rgba(22,24,47,.09);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.7;
  color:var(--ink);
  background-color:#f6f5ff;
  background-image:
    radial-gradient(900px 520px at 8% -6%,rgba(107,91,255,.20),transparent 62%),
    radial-gradient(820px 480px at 94% 0%,rgba(33,182,255,.16),transparent 62%),
    radial-gradient(760px 520px at 50% 40%,rgba(255,107,157,.09),transparent 66%),
    radial-gradient(880px 560px at 12% 88%,rgba(33,182,255,.11),transparent 66%),
    linear-gradient(180deg,#f8f6ff 0%,#f2f6ff 45%,#f6f4ff 100%);
}
h1,h2,h3,h4{margin:0;line-height:1.35;letter-spacing:-.3px;color:var(--ink)}
p{margin:0}
a{color:inherit}
ul{margin:0;padding:0;list-style:none}
img{border:0}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
section[id]{scroll-margin-top:88px}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:70px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:17px;color:var(--ink);flex-shrink:0}
.ai-page-logo{width:36px;display:block;border-radius:9px}
.nav-menu{display:flex;align-items:center;gap:16px}
.nav-links{display:flex;align-items:center;gap:0}
.nav-links a{
  display:block;padding:9px 12px;border-radius:10px;
  color:var(--ink-2);text-decoration:none;font-size:14.5px;font-weight:500;
  white-space:nowrap;transition:color .22s,background .22s;
}
.nav-links a:hover{color:var(--brand);background:rgba(107,91,255,.10)}
.nav-toggle{
  display:none;align-items:center;gap:6px;padding:9px 14px;border-radius:10px;
  border:1px solid rgba(22,24,47,.14);background:#fff;color:var(--ink);
  font-size:14px;font-weight:600;cursor:pointer;font-family:inherit;
}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:700;text-decoration:none;cursor:pointer;
  font-family:inherit;transition:transform .25s,box-shadow .25s,background .25s;
}
.btn-primary{
  background:linear-gradient(120deg,#6b5bff,#21b6ff);color:#fff;
  box-shadow:0 14px 30px -14px rgba(80,60,220,.85);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 38px -16px rgba(80,60,220,.9)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--ink);border-color:rgba(22,24,47,.14);box-shadow:0 8px 20px -16px rgba(22,24,47,.6)}
.btn-ghost:hover{transform:translateY(-2px);border-color:rgba(107,91,255,.5);color:var(--brand)}
.btn-sm{padding:10px 20px;font-size:14px}

/* ============ Hero ============ */
.hero{padding:clamp(36px,5vw,66px) 0 clamp(28px,4vw,48px)}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(107,91,255,.10);border:1px solid rgba(107,91,255,.20);
  color:#4b3ce0;font-size:13px;font-weight:700;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:linear-gradient(135deg,#6b5bff,#21b6ff)}
.hero h1{font-size:clamp(29px,4.3vw,46px);margin:18px 0 16px;line-height:1.22}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-lead{font-size:clamp(15px,1.5vw,17px);color:var(--ink-2);max-width:620px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-panel{
  background:rgba(255,255,255,.80);
  border:1px solid rgba(255,255,255,.95);
  border-radius:26px;padding:24px;
  box-shadow:0 30px 70px -38px rgba(40,30,120,.55),inset 0 0 0 1px rgba(107,91,255,.07);
  backdrop-filter:blur(10px);
}
.panel-head{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--ink-2);margin-bottom:16px}
.panel-head .dot{width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,#6b5bff,#21b6ff)}
.chip-grid{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  padding:6px 12px;border-radius:999px;background:#fff;
  border:1px solid rgba(107,91,255,.20);font-size:13px;font-weight:600;color:#3b3f5c;
  transition:transform .22s,border-color .22s,color .22s;
}
.chip:hover{transform:translateY(-2px);border-color:rgba(107,91,255,.6);color:var(--brand)}
.panel-foot{
  margin-top:18px;padding-top:14px;border-top:1px dashed rgba(22,24,47,.14);
  font-size:13px;color:var(--ink-3);display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;
}

/* ============ Metrics ============ */
.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:clamp(28px,4vw,44px)}
.metric{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 16px;text-align:center;
  box-shadow:0 16px 34px -30px rgba(22,24,47,.6);transition:transform .28s,box-shadow .28s;
}
.metric:hover{transform:translateY(-4px);box-shadow:0 24px 44px -30px rgba(40,30,120,.55)}
.metric b{display:block;font-size:clamp(21px,2.5vw,28px);font-weight:800;color:var(--brand);line-height:1.25}
.metric span{font-size:13px;color:var(--ink-3)}

/* ============ Sections ============ */
.section{padding:clamp(42px,6vw,72px) 0}
.section-head{max-width:800px;margin-bottom:28px}
.section-head h2{font-size:clamp(22px,3vw,32px);margin:12px 0 10px}
.section-head p{color:var(--ink-2);font-size:15.5px}

.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;min-width:0;
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:0 24px 46px -30px rgba(30,25,90,.55);
  border-color:rgba(107,91,255,.35);
}
.card h3{font-size:16.5px;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--ink-2)}

.service-card h3{display:flex;align-items:center;gap:9px}
.service-card h3::before{
  content:"";width:9px;height:9px;border-radius:3px;flex:none;
  background:linear-gradient(135deg,#6b5bff,#21b6ff);
}

.tag-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
.tag{
  padding:7px 14px;border-radius:999px;background:#fff;border:1px solid rgba(22,24,47,.12);
  font-size:13.5px;color:var(--ink-2);font-weight:600;transition:transform .22s,border-color .22s,color .22s;
}
.tag:hover{transform:translateY(-2px);border-color:rgba(107,91,255,.55);color:var(--brand)}

/* ============ Media cards ============ */
.media-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:transform .28s,box-shadow .28s;
}
.media-card:hover{transform:translateY(-4px);box-shadow:0 24px 46px -30px rgba(30,25,90,.55)}
.media-figure{aspect-ratio:4/3;background:linear-gradient(135deg,#eef0ff,#e6f6ff);overflow:hidden}
.media-figure img{width:100%;height:100%;object-fit:cover;display:block}
.media-body{padding:16px 18px 20px}
.media-body h3{font-size:16px;margin-bottom:6px}
.media-body p{font-size:14px;color:var(--ink-2)}

/* ============ Process ============ */
.process{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
.step{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px 16px;
  transition:transform .28s,box-shadow .28s;
}
.step:hover{transform:translateY(-4px);box-shadow:0 22px 42px -30px rgba(30,25,90,.55)}
.step-num{
  width:36px;height:36px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:15px;color:#fff;margin-bottom:12px;
  background:linear-gradient(135deg,#6b5bff,#21b6ff);
}
.step h3{font-size:15px;margin-bottom:6px}
.step p{font-size:13.5px;color:var(--ink-2)}

/* ============ Table ============ */
.table-wrap{
  overflow-x:auto;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:6px;
}
table{width:100%;border-collapse:collapse;min-width:720px;font-size:14.5px}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid rgba(22,24,47,.07);vertical-align:top}
thead th{
  background:linear-gradient(120deg,rgba(107,91,255,.12),rgba(33,182,255,.12));
  color:#20233d;font-size:14px;font-weight:700;white-space:nowrap;
}
tbody tr:last-child td{border-bottom:0}
tbody td:first-child{font-weight:600;color:#20233d;white-space:nowrap}
.hl-col{background:rgba(107,91,255,.07);color:#3628c9;font-weight:600}

/* ============ Score card ============ */
.score-card{
  display:grid;grid-template-columns:auto 1fr;gap:26px;align-items:center;
  background:linear-gradient(120deg,#5b4bff,#21b6ff);color:#fff;
  border-radius:22px;padding:28px;margin-bottom:22px;
  box-shadow:0 30px 64px -34px rgba(60,40,200,.9);
}
.score-main{text-align:center;padding-right:26px;border-right:1px solid rgba(255,255,255,.32)}
.score-value{font-size:clamp(38px,6vw,54px);font-weight:800;line-height:1}
.score-max{font-size:13px;opacity:.9;margin-top:6px}
.score-stars{color:#ffd166;letter-spacing:4px;font-size:17px;margin-bottom:8px}
.score-body h3{color:#fff;font-size:18px;margin-bottom:8px}
.score-body p{font-size:14.5px;color:rgba(255,255,255,.92)}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px}
details.faq{
  background:#fff;border:1px solid var(--line);border-radius:14px;
  transition:border-color .25s,box-shadow .25s;
}
details.faq[open]{border-color:rgba(107,91,255,.4);box-shadow:0 20px 44px -34px rgba(30,25,90,.65)}
details.faq summary{
  cursor:pointer;list-style:none;padding:16px 48px 16px 18px;
  font-weight:600;font-size:15px;color:var(--ink);position:relative;
}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{
  content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);
  font-size:20px;font-weight:700;color:var(--brand);line-height:1;
}
details.faq[open] summary::after{content:"−"}
details.faq p{padding:0 18px 18px;font-size:14.5px;color:var(--ink-2)}

/* ============ Reviews ============ */
.review-card{display:flex;flex-direction:column;gap:14px}
.review-head{display:flex;align-items:center;gap:12px}
.avatar{
  width:42px;height:42px;border-radius:50%;flex:none;
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:700;font-size:15px;
  background:linear-gradient(135deg,#6b5bff,#21b6ff);
}
.review-card:nth-child(3n+2) .avatar{background:linear-gradient(135deg,#ff7a9c,#ffb648)}
.review-card:nth-child(3n+3) .avatar{background:linear-gradient(135deg,#21b6ff,#5bd6a8)}
.review-name{font-weight:700;font-size:14.5px;color:var(--ink)}
.review-role{font-size:12.5px;color:var(--ink-3)}
.review-stars{color:#ff9f1a;font-size:13px;letter-spacing:2px}
.review-text{font-size:14.5px;color:var(--ink-2);margin:0}

/* ============ News ============ */
.news-card{display:flex;flex-direction:column;gap:10px;text-decoration:none;color:inherit}
.news-card .news-more{font-size:13.5px;font-weight:700;color:var(--brand)}

/* ============ Form ============ */
.form-card{padding:26px}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.field{display:flex;flex-direction:column;gap:7px;min-width:0}
.field.full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:600;color:#3b3f5c}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:12px;
  border:1px solid rgba(22,24,47,.15);background:#fbfaff;
  color:var(--ink);font-size:14.5px;font-family:inherit;
  transition:border-color .2s,box-shadow .2s,background .2s;outline:none;
}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(107,91,255,.13);
}
.field textarea{resize:vertical;min-height:118px;line-height:1.6}
.form-submit{margin-top:18px;width:100%}
.form-note{margin-top:12px;font-size:13px;color:var(--ink-3);text-align:center}

/* ============ Contact ============ */
.contact-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:start}
.contact-list{margin:0}
.contact-item{
  display:flex;gap:12px;padding:14px 0;border-bottom:1px dashed rgba(22,24,47,.13);
  font-size:14.5px;color:var(--ink-2);
}
.contact-item:last-child{border-bottom:0}
.contact-label{flex:none;width:92px;color:var(--ink);font-weight:600}
.contact-item a{color:var(--brand);text-decoration:none;font-weight:600}
.contact-item a:hover{text-decoration:underline}
.qr-box{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;text-align:center;
}
.qr-box img{width:100%;max-width:190px;height:auto;display:block;margin:0 auto 12px;border-radius:12px}
.qr-box span{display:block;font-size:13.5px;color:var(--ink-3)}

/* ============ Partner ============ */
.partner-wrap{
  background:linear-gradient(120deg,rgba(107,91,255,.10),rgba(33,182,255,.12));
  border:1px solid rgba(107,91,255,.22);border-radius:24px;padding:clamp(24px,4vw,40px);
}
.partner-wrap h2{font-size:clamp(21px,2.8vw,28px);margin-bottom:10px}
.partner-wrap > p{color:var(--ink-2);font-size:15px;max-width:760px}
.partner-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:22px 0 24px}
.partner-point{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px}
.partner-point h3{font-size:15px;margin-bottom:6px}
.partner-point p{font-size:13.5px;color:var(--ink-2)}

/* ============ Help cards ============ */
.help-card{display:flex;align-items:center;justify-content:space-between;gap:14px;text-decoration:none}
.help-card h3{margin:0;font-size:15.5px}
.help-card p{margin:4px 0 0;font-size:13.5px}
.help-arrow{font-size:18px;color:var(--brand);font-weight:700;flex:none}

/* ============ Footer ============ */
.site-footer{background:#141530;color:#b9bdd8;padding:44px 0 0;margin-top:clamp(24px,4vw,48px)}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr;gap:34px;
  padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.13);
}
.footer-title{font-size:15px;font-weight:700;color:#ffffff;margin-bottom:10px}
.footer-brand p{font-size:14px;color:#b9bdd8;max-width:520px}
.footer-links{display:flex;flex-wrap:wrap;gap:10px 18px}
.footer-links a{color:#b9bdd8;text-decoration:none;font-size:14px;transition:color .2s}
.footer-links a:hover{color:#ffffff}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
  padding:18px 0 24px;font-size:13px;color:#8f93b3;
}

/* ============ Floating ============ */
.float-btn{
  position:fixed;right:20px;bottom:22px;z-index:80;
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 20px;border-radius:999px;border:none;cursor:pointer;
  color:#fff;font-weight:700;font-size:14px;font-family:inherit;
  background:linear-gradient(120deg,#6b5bff,#21b6ff);
  box-shadow:0 18px 36px -16px rgba(60,40,200,.9);
  transition:transform .25s,box-shadow .25s;
}
.float-btn:hover{transform:translateY(-3px);box-shadow:0 22px 42px -16px rgba(60,40,200,.95)}
.float-panel{
  position:fixed;right:20px;bottom:84px;z-index:80;width:250px;
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px;
  box-shadow:0 28px 60px -28px rgba(20,16,60,.6);display:none;
}
.float-panel.open{display:block}
.float-panel h4{font-size:14px;margin-bottom:10px;color:var(--ink)}
.float-panel img{width:100%;height:auto;display:block;border-radius:12px;border:1px solid var(--line);margin-bottom:10px}
.float-panel p{font-size:13px;color:var(--ink-2);line-height:1.8}
.float-panel a{color:var(--brand);text-decoration:none;font-weight:600}

/* ============ Reveal ============ */
.js-ready [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}
.js-ready [data-reveal].in{opacity:1;transform:none}

/* ============ Responsive ============ */
@media (max-width:1080px){
  .nav-toggle{display:inline-flex}
  .nav-menu{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    background:#fff;border-bottom:1px solid var(--line);
    box-shadow:0 24px 46px -30px rgba(22,24,47,.5);
    padding:10px 0 16px;display:none;
  }
  .nav-menu.open{display:flex}
  .nav-links{flex-direction:column;align-items:stretch;gap:0}
  .nav-links a{padding:12px 22px;font-size:15px;border-radius:0}
  .nav-cta{margin:8px 20px 0}
}
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .process{grid-template-columns:repeat(2,minmax(0,1fr))}
  .partner-points{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
}
@media (max-width:820px){
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .score-card{grid-template-columns:1fr;gap:16px;text-align:left}
  .score-main{padding-right:0;border-right:0;text-align:left}
}
@media (max-width:640px){
  .container{padding:0 18px}
  .g2,.g3,.g4,.process{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .contact-label{width:76px}
  .float-btn{right:14px;bottom:16px;padding:11px 16px;font-size:13.5px}
  .float-panel{right:14px;bottom:74px;width:calc(100% - 28px);max-width:280px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js-ready [data-reveal]{opacity:1;transform:none;transition:none}
  .card:hover,.metric:hover,.step:hover,.media-card:hover{transform:none}
}