*{box-sizing:border-box}
:root{
  --yellow:#FFD400;
  --yellow-deep:#F2C200;
  --yellow-soft:#FFF4B8;
  --ink:#15140F;
  --ink-2:#3A372E;
  --muted:#6E6A5C;
  --paper:#FFFCF2;
  --line:#EAE2CC;
  --radius:18px;
}
html{background:var(--paper);scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  color:var(--ink);
  background:transparent;
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(680px 420px at 10% -8%, rgba(255,212,0,.30), rgba(255,212,0,0) 70%),
    radial-gradient(760px 480px at 94% 6%, rgba(255,214,64,.20), rgba(255,214,64,0) 72%),
    radial-gradient(900px 620px at 50% 108%, rgba(255,236,150,.32), rgba(255,236,150,0) 70%);
}
img{max-width:100%}
a{color:inherit}
.container{width:min(1180px,100% - 40px);margin-left:auto;margin-right:auto}
section[id]{scroll-margin-top:92px}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,252,242,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(21,20,15,.08);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;min-height:72px;position:relative;
}
.brand{
  display:flex;align-items:center;gap:10px;text-decoration:none;
  font-weight:800;letter-spacing:.04em;color:var(--ink);flex-shrink:0;
}
.ai-page-logo{max-height:38px;width:auto;display:block}
.brand-name{font-size:17px;white-space:nowrap}
.nav{display:flex;align-items:center}
.nav-links{
  display:flex;align-items:center;gap:0;
  list-style:none;margin:0;padding:0;
}
.nav-links a{
  display:block;padding:8px 11px;font-size:15px;color:var(--ink-2);
  text-decoration:none;border-radius:10px;white-space:nowrap;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.nav-links a:hover{background:var(--yellow-soft);color:var(--ink);transform:translateY(-1px)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:40px;padding:0;border:1px solid var(--line);
  background:#fff;border-radius:12px;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:14px;font-weight:800;font-size:16px;
  text-decoration:none;border:2px solid var(--ink);cursor:pointer;
  font-family:inherit;line-height:1.2;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease;
}
.btn-primary{background:var(--yellow);color:var(--ink);box-shadow:4px 4px 0 var(--ink)}
.btn-primary:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 var(--ink)}
.btn-primary:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--ink)}
.btn-ghost{background:#fff;color:var(--ink);box-shadow:4px 4px 0 rgba(21,20,15,.14)}
.btn-ghost:hover{background:var(--yellow-soft);transform:translate(-2px,-2px);box-shadow:7px 7px 0 rgba(21,20,15,.14)}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:12px;box-shadow:3px 3px 0 var(--ink)}
.btn-sm:hover{box-shadow:5px 5px 0 var(--ink)}

/* hero */
.hero{position:relative;overflow:hidden;padding:82px 0 66px}
.hero::before{
  content:"";position:absolute;width:440px;height:440px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,212,0,.55),rgba(255,212,0,0) 68%);
  top:-150px;right:-90px;pointer-events:none;
  animation:floaty 13s ease-in-out infinite;
}
.hero::after{
  content:"";position:absolute;width:180px;height:180px;
  border:14px solid rgba(255,212,0,.45);border-radius:34px;
  left:-70px;bottom:-60px;transform:rotate(16deg);
  pointer-events:none;animation:floaty 16s ease-in-out infinite reverse;
}
@keyframes floaty{0%,100%{transform:translateY(0) rotate(16deg)}50%{transform:translateY(22px) rotate(20deg)}}
.hero-inner{position:relative;z-index:1;max-width:860px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.12em;
  color:var(--ink);background:var(--yellow);
  padding:6px 15px;border-radius:999px;margin:0 0 18px;
  border:1px solid rgba(21,20,15,.14);
}
.hero h1{
  font-size:clamp(30px,5vw,52px);line-height:1.18;letter-spacing:-1px;
  margin:0 0 20px;font-weight:800;
}
.hero h1 mark{
  background:linear-gradient(transparent 58%,var(--yellow) 58%);
  color:inherit;padding:0 3px;
}
.hero-lead{
  font-size:clamp(15px,1.8vw,18px);color:var(--ink-2);
  margin:0 0 30px;max-width:760px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:18px}
.hero-note{margin:0;font-size:14px;color:var(--muted)}
.hero-copy > *{animation:rise .7s ease both}
.hero-copy > *:nth-child(2){animation-delay:.06s}
.hero-copy > *:nth-child(3){animation-delay:.12s}
.hero-copy > *:nth-child(4){animation-delay:.18s}
.hero-copy > *:nth-child(5){animation-delay:.24s}
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}

.metrics{
  position:relative;z-index:1;
  list-style:none;margin:44px 0 0;padding:0;
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
}
.metric{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:22px 20px;box-shadow:0 10px 26px rgba(21,20,15,.06);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  animation:rise .8s ease both;
}
.metric:nth-child(2){animation-delay:.1s}
.metric:nth-child(3){animation-delay:.18s}
.metric:nth-child(4){animation-delay:.26s}
.metric:hover{transform:translateY(-4px);border-color:var(--yellow);box-shadow:0 18px 34px rgba(21,20,15,.12)}
.metric strong{display:block;font-size:clamp(22px,3vw,30px);line-height:1.2;font-weight:900;letter-spacing:-.5px}
.metric span{display:block;margin-top:6px;font-size:13.5px;color:var(--muted)}

/* generic section */
.section{padding:74px 0;position:relative}
.section + .section{border-top:1px solid rgba(21,20,15,.06)}
.section--tint{background:rgba(255,212,0,.08)}
.section-head{max-width:760px;margin-bottom:34px}
.section-head h2{
  font-size:clamp(24px,3.4vw,36px);line-height:1.28;letter-spacing:-.6px;
  margin:0 0 14px;font-weight:800;
}
.section-desc{margin:0;color:var(--muted);font-size:16px}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;align-items:stretch}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:0 8px 24px rgba(21,20,15,.05);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:0 18px 38px rgba(21,20,15,.12);border-color:var(--yellow)}
.card h3{font-size:18px;margin:0 0 10px;font-weight:800;letter-spacing:-.3px}
.card p{margin:0;color:var(--muted);font-size:15px}

.service-card{position:relative;padding-top:26px}
.service-card::before{
  content:"";position:absolute;top:0;left:24px;width:42px;height:5px;
  border-radius:0 0 6px 6px;background:var(--yellow);
}
.service-card h3::after{
  content:"";display:block;width:26px;height:3px;border-radius:2px;
  background:var(--yellow);margin-top:10px;
}

.models-block{margin-top:34px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.models-block h3{margin:0 0 16px;font-size:17px;font-weight:800}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:0;padding:0}
.tag-cloud li{
  font-size:13.5px;padding:6px 13px;border-radius:999px;
  background:#FFFDF4;border:1px solid var(--line);color:var(--ink-2);
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.tag-cloud li:hover{background:var(--yellow);border-color:var(--yellow-deep);transform:translateY(-2px)}

/* steps */
.steps{
  display:grid;grid-template-columns:repeat(5,1fr);gap:16px;
  list-style:none;margin:0;padding:0;
}
.step{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px 18px;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.step:hover{transform:translateY(-4px);border-color:var(--yellow);box-shadow:0 16px 32px rgba(21,20,15,.1)}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;background:var(--yellow);
  color:var(--ink);font-weight:800;font-size:14px;margin-bottom:14px;
}
.step h3{font-size:16px;margin:0 0 8px;font-weight:800}
.step p{margin:0;font-size:14px;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:26px 0 0;padding:0}
.chips li{
  font-size:14px;padding:8px 16px;border-radius:999px;
  background:var(--yellow-soft);color:var(--ink);border:1px solid rgba(21,20,15,.1);
  font-weight:600;transition:transform .2s ease,background .2s ease;
}
.chips li:hover{transform:translateY(-2px);background:var(--yellow)}

/* network strip */
.network-strip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
  margin-top:28px;background:var(--ink);color:#FFF7D6;
  border-radius:var(--radius);padding:28px 26px;
}
.network-item h3{margin:0 0 8px;font-size:16px;color:var(--yellow);font-weight:800}
.network-item p{margin:0;font-size:14.5px;color:#E8E0C6}

/* cases */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.case-card{
  margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:0 8px 24px rgba(21,20,15,.05);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.case-card:hover{transform:translateY(-4px);box-shadow:0 20px 40px rgba(21,20,15,.13);border-color:var(--yellow)}
.case-media{aspect-ratio:16/10;overflow:hidden;background:#F6F0DA}
.case-media img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s ease}
.case-card:hover .case-media img{transform:scale(1.04)}
.case-card figcaption{padding:18px 22px 22px}
.case-card h3{margin:0 0 6px;font-size:17px;font-weight:800}
.case-card p{margin:0;font-size:14.5px;color:var(--muted)}

/* score + table */
.score-card{
  display:flex;align-items:center;flex-wrap:wrap;gap:14px 30px;
  background:var(--yellow);border:2px solid var(--ink);
  border-radius:22px;padding:26px 30px;box-shadow:6px 6px 0 var(--ink);
  margin-bottom:28px;
}
.score-stars{font-size:26px;letter-spacing:5px;color:var(--ink);line-height:1}
.score-num{font-size:44px;font-weight:900;line-height:1;letter-spacing:-1px}
.score-num span{font-size:17px;font-weight:700;color:var(--ink-2);margin-left:4px}
.score-text{margin:0;font-weight:700;font-size:16px;color:var(--ink)}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:#fff;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;min-width:760px;font-size:15px}
thead th{background:var(--ink);color:#FFF6CE;text-align:left;padding:15px 18px;font-weight:700;white-space:nowrap}
tbody td{padding:14px 18px;border-top:1px solid var(--line);color:var(--ink-2);vertical-align:top}
tbody td:first-child{font-weight:800;color:var(--ink);white-space:nowrap}
tbody td:nth-child(2){background:rgba(255,212,0,.12);color:var(--ink);font-weight:600}
tbody tr:nth-child(even) td:nth-child(n+3){background:#FFFDF4}

/* reviews */
.review-card{margin:0;display:flex;flex-direction:column;gap:16px}
.review-card blockquote{
  margin:0;font-size:15px;color:var(--ink-2);line-height:1.75;
  position:relative;padding-top:18px;
}
.review-card blockquote::before{
  content:"“";position:absolute;top:-14px;left:0;
  font-size:46px;color:var(--yellow-deep);line-height:1;font-family:Georgia,serif;
}
.review-card figcaption{display:flex;flex-direction:column;gap:2px;margin-top:auto}
.review-card strong{font-size:15px;font-weight:800}
.review-card span{font-size:13.5px;color:var(--muted)}

/* help */
.help-grid{display:grid;grid-template-columns:0.85fr 1.15fr;gap:22px;align-items:start}
.help-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.help-panel h3{margin:0 0 16px;font-size:17px;font-weight:800}
.article-list ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.article-list a{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:15px 18px;background:#FFFDF4;border:1px solid var(--line);
  border-radius:14px;text-decoration:none;color:var(--ink);font-size:15px;font-weight:600;
  transition:border-color .2s ease,transform .2s ease,background .2s ease;
}
.article-list a::after{content:"→";color:var(--yellow-deep);font-weight:800}
.article-list a:hover{border-color:var(--yellow);background:#fff;transform:translateX(4px)}

/* contact */
.contact-grid{display:grid;grid-template-columns:1.35fr 0.85fr;gap:24px;align-items:start}
.need-form{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px;box-shadow:0 10px 30px rgba(21,20,15,.06)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.need-form label{display:block;font-size:14px;font-weight:700;color:var(--ink);margin-bottom:16px}
.need-form input,.need-form select,.need-form textarea{
  width:100%;margin-top:8px;padding:12px 14px;border:1px solid #E2DAC2;border-radius:12px;
  font-size:15px;font-family:inherit;color:var(--ink);background:#FFFDF6;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.need-form input:focus,.need-form select:focus,.need-form textarea:focus{
  outline:none;border-color:var(--yellow-deep);box-shadow:0 0 0 4px rgba(255,212,0,.28);
}
.need-form textarea{resize:vertical;min-height:112px}
.form-tip{margin:14px 0 0;font-size:13px;color:var(--muted)}
.contact-card{background:var(--ink);color:#F4EEDC;border-radius:20px;padding:26px}
.contact-card h3{margin:0 0 16px;font-size:17px;color:var(--yellow);font-weight:800}
.contact-card ul{list-style:none;margin:0;padding:0;display:grid;gap:11px;font-size:14.5px}
.contact-card a{color:var(--yellow);text-decoration:none}
.contact-card a:hover{text-decoration:underline}
.contact-qr{width:150px;border-radius:14px;background:#fff;padding:8px;display:block;margin:18px 0 6px}
.contact-qr-note{margin:0;font-size:13px;color:#BDB59B}
.agent-note{
  margin-top:18px;padding:14px 16px;border-radius:12px;
  background:rgba(255,212,0,.16);border:1px solid rgba(255,212,0,.4);
  font-size:13.5px;color:#FDF6DC;
}

/* faq */
.faq-list{display:grid;gap:12px;max-width:920px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.open{border-color:var(--yellow);box-shadow:0 12px 28px rgba(21,20,15,.09)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:none;border:0;font-family:inherit;
  font-weight:700;font-size:16px;color:var(--ink);text-align:left;cursor:pointer;
  transition:background .2s ease;
}
.faq-q:hover{background:#FFFDF4}
.faq-q::after{content:"+";font-size:22px;font-weight:400;color:var(--ink-2);line-height:1;transition:transform .3s ease}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{margin:0;padding:0 20px 18px;color:var(--muted);font-size:15px}

/* reveal */
.reveal{transition:opacity .6s ease,transform .6s ease}
.reveal.pre{opacity:0;transform:translateY(18px)}

/* footer */
.site-footer{background:var(--ink);color:#F2ECDA;padding:52px 0 24px}
.footer-main{display:grid;grid-template-columns:1.7fr 1.1fr 0.7fr;gap:32px}
.site-footer h3{font-size:15px;color:var(--yellow);margin:0 0 14px;font-weight:800;letter-spacing:.04em}
.footer-brand p{margin:0 0 12px;font-size:14.5px;color:#E4DDC6;max-width:420px}
.footer-logo{font-size:19px;font-weight:900;color:#fff;letter-spacing:.06em}
.footer-site{color:var(--yellow);text-decoration:none;font-weight:700;font-size:14.5px}
.footer-site:hover{text-decoration:underline}
.footer-contact ul{list-style:none;margin:0;padding:0;display:grid;gap:9px;font-size:14.5px;color:#E4DDC6}
.footer-contact a{color:var(--yellow);text-decoration:none}
.footer-contact a:hover{text-decoration:underline}
.footer-qr img{width:132px;border-radius:12px;background:#fff;padding:7px;display:block}
.footer-links{margin-top:32px;padding-top:24px;border-top:1px solid rgba(255,246,206,.16)}
.footer-links ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:12px 22px;font-size:14.5px}
.footer-links a{color:#E4DDC6;text-decoration:none;transition:color .2s ease}
.footer-links a:hover{color:var(--yellow)}
.footer-bottom{
  margin-top:26px;padding-top:18px;border-top:1px solid rgba(255,246,206,.16);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13.5px;color:#B5AE96;
}
.footer-bottom p{margin:0}
.ai-page-home-link{color:var(--yellow);text-decoration:none;font-weight:700;font-size:13.5px}
.ai-page-home-link:hover{text-decoration:underline}

/* floating */
.float-contact,.back-top{
  position:fixed;right:20px;z-index:70;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:14px;border:2px solid var(--ink);font-family:inherit;
  text-decoration:none;font-weight:800;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,opacity .25s ease;
}
.float-contact{
  bottom:86px;width:62px;height:56px;font-size:13px;
  background:var(--yellow);color:var(--ink);box-shadow:3px 3px 0 var(--ink);
}
.float-contact:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.back-top{
  bottom:22px;width:62px;height:56px;font-size:18px;
  background:#fff;color:var(--ink);box-shadow:3px 3px 0 rgba(21,20,15,.18);
  opacity:0;visibility:hidden;
}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(21,20,15,.18)}

/* responsive */
@media (max-width:1024px){
  .help-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-main{grid-template-columns:1fr 1fr;gap:26px}
}
@media (max-width:960px){
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;top:calc(100% + 1px);left:0;right:0;
    display:none;flex-direction:column;align-items:stretch;
    background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;
    padding:8px 20px 16px;box-shadow:0 18px 30px rgba(21,20,15,.12);
    max-height:70vh;overflow-y:auto;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 6px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-links li:last-child a{border-bottom:0}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .network-strip{grid-template-columns:1fr;gap:18px}
  .hero{padding:60px 0 52px}
  .section{padding:56px 0}
  .score-card{padding:22px;box-shadow:4px 4px 0 var(--ink)}
}
@media (max-width:640px){
  .header-actions .btn-sm{display:none}
  .metrics{grid-template-columns:repeat(2,1fr);margin-top:34px}
  .grid-3,.grid-2,.case-grid,.steps{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-main{grid-template-columns:1fr}
  .score-stars{font-size:22px;letter-spacing:4px}
  .score-num{font-size:36px}
  .float-contact,.back-top{width:56px;height:52px;right:14px}
  .float-contact{bottom:80px}
  .back-top{bottom:18px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .reveal.pre{opacity:1;transform:none}
}