*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  color:#0e1b33;
  line-height:1.7;
  background-color:#f3f7ff;
  background-image:
    radial-gradient(900px 460px at 12% 0%, rgba(180,210,255,.55) 0%, rgba(243,247,255,0) 62%),
    radial-gradient(820px 420px at 92% 6%, rgba(196,222,255,.55) 0%, rgba(243,247,255,0) 60%),
    linear-gradient(180deg,#f3f7ff 0%,#fbfdff 45%,#eef4ff 100%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font-family:inherit}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}

/* ============ Header ============ */
.site-header{position:sticky;top:0;z-index:200;background:rgba(255,255,255,.94);border-bottom:1px solid #dbe6ff;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px;position:relative}
.brand{display:flex;align-items:center;flex-shrink:0;max-width:180px}
.ai-page-logo{max-width:160px;max-height:40px;width:auto;object-fit:contain}
.nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
.nav-links a{display:inline-block;padding:8px 11px;font-size:15px;color:#33415c;border-radius:9px;white-space:nowrap;transition:color .2s ease,background .2s ease}
.nav-links a:hover{color:#1247d6;background:#eef4ff}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:40px;padding:0 11px;border:1px solid #d6e4ff;background:#fff;border-radius:11px;cursor:pointer;transition:border-color .2s}
.nav-toggle:hover{border-color:#a9c4ff}
.nav-toggle span{display:block;height:2px;width:100%;background:#1247d6;border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.nav-toggle.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-active span:nth-child(2){opacity:0}
.nav-toggle.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:66px 0 58px;background:linear-gradient(160deg,#e8f0ff 0%,#f8fbff 52%,#ecf3ff 100%)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;background:
  radial-gradient(620px 320px at 84% 6%, rgba(47,116,255,.22) 0%, rgba(47,116,255,0) 66%),
  radial-gradient(540px 280px at 4% 88%, rgba(26,92,255,.16) 0%, rgba(26,92,255,0) 70%);}
.hero-inner{position:relative;display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.5px;color:#1247d6;background:#e2ecff;border:1px solid #cbe0ff;padding:5px 13px;border-radius:999px;margin-bottom:16px}
.hero h1{font-size:clamp(28px,3.6vw,44px);line-height:1.26;color:#07204f;letter-spacing:-.6px;margin-bottom:18px}
.hero-lead{font-size:16px;color:#41537a;max-width:560px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;border-radius:12px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease}
.btn:active{transform:scale(.985)}
.btn-primary{background:linear-gradient(135deg,#2a6bff 0%,#0b3aa8 100%);color:#fff;box-shadow:0 12px 26px rgba(26,92,255,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(26,92,255,.42)}
.btn-ghost{background:#fff;color:#1247d6;border-color:#c8dbff;box-shadow:0 6px 16px rgba(18,64,180,.08)}
.btn-ghost:hover{background:#eef4ff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(18,64,180,.14)}
.btn-light{background:#fff;color:#0b3aa8;box-shadow:0 10px 24px rgba(6,26,72,.2)}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(6,26,72,.28)}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.hero-tags li{font-size:13px;color:#0b3aa8;background:#e6eeff;border:1px solid #cfe0ff;padding:6px 13px;border-radius:999px}
.hero-panel{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.stat-card{background:#fff;border:1px solid #dde8ff;border-radius:16px;padding:20px 18px;box-shadow:0 12px 28px rgba(18,64,180,.09);transition:transform .25s ease,box-shadow .25s ease}
.stat-card:hover{transform:translateY(-4px);box-shadow:0 20px 38px rgba(18,64,180,.16)}
.stat-num{display:block;font-size:26px;font-weight:800;line-height:1.2;color:#1247d6;letter-spacing:-.5px}
.stat-label{display:block;font-size:13px;color:#5b6b88;margin-top:4px}
.stat-card.wide{grid-column:1 / -1;background:linear-gradient(135deg,#0f47c9 0%,#1a5cff 100%);border-color:#1a5cff}
.stat-card.wide .stat-num{color:#fff}
.stat-card.wide .stat-label{color:#d6e6ff}

/* ============ Model bar ============ */
.model-bar{padding:34px 0 6px}
.model-bar-title{font-size:14px;font-weight:700;color:#0b2149;letter-spacing:.4px}
.model-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.model-chips li{font-size:13px;color:#33415c;background:#fff;border:1px solid #dbe6ff;padding:5px 12px;border-radius:9px;transition:color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease}
.model-chips li:hover{color:#1247d6;border-color:#a9c4ff;transform:translateY(-2px);box-shadow:0 8px 18px rgba(18,64,180,.12)}

/* ============ Section basics ============ */
.section{padding:62px 0}
.section-head{max-width:780px;margin-bottom:34px}
.section-head h2{font-size:clamp(22px,2.5vw,31px);line-height:1.34;color:#07204f;margin-bottom:12px;letter-spacing:-.3px}
.section-desc{font-size:15px;color:#5b6b88}
.grid{display:grid;gap:20px;align-items:stretch}
.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))}

.card{display:flex;flex-direction:column;gap:11px;height:100%;background:#fff;border:1px solid #e3ecff;border-radius:16px;padding:24px;box-shadow:0 8px 20px rgba(18,64,180,.06);transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease}
.card:hover{transform:translateY(-4px);box-shadow:0 20px 36px rgba(18,64,180,.14);border-color:#b9d0ff}
.card h3{font-size:17px;line-height:1.4;color:#0b2149}
.card p{font-size:14px;color:#5b6b88;line-height:1.7}
.card-icon{width:44px;height:44px;border-radius:13px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e6eeff 0%,#d3e3ff 100%);color:#1247d6;flex-shrink:0}
.tag{margin-top:auto;align-self:flex-start;font-size:12px;color:#1247d6;background:#eef4ff;border:1px solid #d6e4ff;padding:4px 11px;border-radius:8px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:9px}
.tag-cloud li{font-size:13px;color:#1247d6;background:#eef4ff;border:1px solid #d6e4ff;padding:6px 13px;border-radius:999px;cursor:default;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease}
.tag-cloud li:hover{background:#1a5cff;color:#fff;border-color:#1a5cff;transform:translateY(-2px)}

/* ============ Steps ============ */
.steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
.step{position:relative;height:100%;background:#fff;border:1px solid #e3ecff;border-radius:16px;padding:22px 18px;box-shadow:0 8px 20px rgba(18,64,180,.06);transition:transform .26s ease,box-shadow .26s ease}
.step:hover{transform:translateY(-4px);box-shadow:0 18px 34px rgba(18,64,180,.14)}
.step-index{width:36px;height:36px;border-radius:11px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#2a6bff 0%,#0b3aa8 100%);color:#fff;font-size:14px;font-weight:700;margin-bottom:14px}
.step h3{font-size:16px;color:#0b2149;margin-bottom:8px;line-height:1.4}
.step p{font-size:13.5px;color:#5b6b88;line-height:1.7}

/* ============ Tables ============ */
.table-wrap{overflow-x:auto;background:#fff;border:1px solid #e3ecff;border-radius:16px;box-shadow:0 8px 22px rgba(18,64,180,.07);-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;min-width:760px;font-size:14px}
thead th{background:#eef4ff;color:#0b2149;font-weight:700;text-align:left;padding:15px 18px;border-bottom:1px solid #dbe6ff;white-space:nowrap}
tbody td{padding:14px 18px;border-bottom:1px solid #f0f5ff;color:#41537a;vertical-align:top;line-height:1.65}
tbody tr:last-child td{border-bottom:0}
tbody tr{transition:background .2s ease}
tbody tr:hover{background:#f7faff}
td.is-strong{color:#0b3aa8;font-weight:600}

/* ============ Review ============ */
.review-layout{display:grid;grid-template-columns:290px minmax(0,1fr);gap:24px;align-items:start}
.score-card{background:linear-gradient(158deg,#1447c9 0%,#0a2f88 100%);border-radius:20px;padding:30px 26px;color:#fff;box-shadow:0 20px 44px rgba(11,58,168,.3)}
.score-card h3{font-size:16px;font-weight:600;color:#d9e7ff;margin-bottom:14px}
.score-value{font-size:52px;font-weight:800;line-height:1;letter-spacing:-1px;color:#fff}
.score-max{font-size:14px;color:#bdd3ff;margin-left:6px}
.stars{display:block;color:#ffd166;font-size:20px;letter-spacing:4px;margin:16px 0 10px}
.score-note{font-size:13.5px;color:#d3e2ff;line-height:1.7}
.score-divider{height:1px;background:rgba(255,255,255,.2);margin:18px 0}
.score-points{display:flex;flex-direction:column;gap:8px;font-size:13.5px;color:#e6efff}
.score-points li{position:relative;padding-left:16px}
.score-points li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:#7fb0ff}

/* ============ Testimonials ============ */
.review-card{display:flex;flex-direction:column;gap:12px;height:100%;background:#fff;border:1px solid #e3ecff;border-radius:16px;padding:24px;box-shadow:0 8px 20px rgba(18,64,180,.06);transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease}
.review-card:hover{transform:translateY(-4px);box-shadow:0 20px 36px rgba(18,64,180,.14);border-color:#b9d0ff}
.review-card .quote-stars{color:#ffb703;font-size:15px;letter-spacing:2px}
.review-card blockquote{font-size:14.5px;color:#41537a;line-height:1.78}
.reviewer{margin-top:auto;padding-top:14px;border-top:1px dashed #e0eaff;display:flex;flex-direction:column;gap:2px}
.reviewer strong{font-size:14px;color:#0b2149}
.reviewer span{font-size:12.5px;color:#7c8aa6}

/* ============ Cases ============ */
.case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.case-item{background:#fff;border:1px solid #e3ecff;border-radius:16px;overflow:hidden;box-shadow:0 8px 20px rgba(18,64,180,.06);transition:transform .26s ease,box-shadow .26s ease;display:flex;flex-direction:column}
.case-item:hover{transform:translateY(-4px);box-shadow:0 20px 36px rgba(18,64,180,.14)}
.case-media{aspect-ratio:4 / 3;background:#eef4ff;display:flex;align-items:center;justify-content:center;padding:10px}
.case-media img{width:100%;height:100%;object-fit:contain}
.case-item figcaption{padding:14px 18px 16px;font-size:13.5px;color:#5b6b88;border-top:1px solid #f0f5ff}

/* ============ News ============ */
.news-list{display:flex;flex-direction:column;gap:12px}
.news-item{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 22px;background:#fff;border:1px solid #e3ecff;border-radius:14px;box-shadow:0 6px 16px rgba(18,64,180,.05);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.news-item:hover{transform:translateX(4px);border-color:#b9d0ff;box-shadow:0 14px 28px rgba(18,64,180,.12)}
.news-main h3{font-size:15.5px;color:#0b2149;margin-bottom:4px;line-height:1.45}
.news-main p{font-size:13.5px;color:#7c8aa6}
.news-link{flex-shrink:0;font-size:13.5px;font-weight:600;color:#1247d6;white-space:nowrap}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border:1px solid #e3ecff;border-radius:14px;overflow:hidden;transition:border-color .25s ease,box-shadow .25s ease}
.faq-item[open]{border-color:#b9d0ff;box-shadow:0 12px 26px rgba(18,64,180,.1)}
.faq-item summary{list-style:none;cursor:pointer;padding:17px 52px 17px 22px;font-size:15px;font-weight:600;color:#0b2149;position:relative;transition:color .2s ease}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:20px;font-weight:400;color:#1247d6;line-height:1}
.faq-item[open] summary::after{content:"–"}
.faq-item summary:hover{color:#1247d6}
.faq-answer{padding:0 22px 18px;font-size:14px;color:#5b6b88;line-height:1.78}

/* ============ Contact / Form ============ */
.contact-layout{display:grid;grid-template-columns:.95fr 1.05fr;gap:24px;align-items:start}
.contact-card{display:flex;flex-direction:column;gap:16px;background:#fff;border:1px solid #e3ecff;border-radius:20px;padding:28px;box-shadow:0 10px 26px rgba(18,64,180,.08);height:100%}
.contact-list{display:flex;flex-direction:column;gap:12px;font-size:14px;color:#41537a}
.contact-list li{display:flex;flex-wrap:wrap;gap:6px 12px;align-items:baseline;padding-bottom:12px;border-bottom:1px dashed #e6eeff}
.contact-list li:last-child{border-bottom:0;padding-bottom:0}
.contact-list strong{color:#0b2149;font-weight:600;min-width:76px;font-size:13.5px}
.contact-list a{color:#1247d6;font-weight:600;word-break:break-all}
.contact-list a:hover{text-decoration:underline}
.qr-box{display:flex;align-items:center;gap:16px;background:#f5f9ff;border:1px solid #e3ecff;border-radius:14px;padding:14px}
.qr-img{width:120px;max-width:100%;border-radius:10px;border:1px solid #dbe6ff;background:#fff}
.qr-box p{font-size:13.5px;color:#5b6b88;line-height:1.7}
.qr-box strong{display:block;color:#0b2149;font-size:14px;margin-bottom:2px}
.form-card{background:#fff;border:1px solid #e3ecff;border-radius:20px;padding:28px;box-shadow:0 10px 26px rgba(18,64,180,.08)}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1 / -1}
.field label{font-size:13px;font-weight:600;color:#33415c}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;font-size:14px;font-family:inherit;color:#0e1b33;background:#fbfdff;border:1px solid #d6e4ff;border-radius:10px;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease}
.field textarea{min-height:118px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:#1a5cff;background:#fff;box-shadow:0 0 0 3px rgba(26,92,255,.15)}
.form-actions{margin-top:19px;display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.form-hint{font-size:12.5px;color:#8494b0}

/* ============ Join banner ============ */
.join-banner{background:linear-gradient(120deg,#0b3aa8 0%,#1a5cff 58%,#3f7dff 100%);border-radius:24px;padding:44px 40px;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;box-shadow:0 22px 48px rgba(11,58,168,.28)}
.join-banner h2{font-size:clamp(20px,2.3vw,27px);line-height:1.4;color:#fff;margin-bottom:10px}
.join-banner p{font-size:14.5px;color:#dbe8ff;max-width:640px}

/* ============ Float dock ============ */
.float-contact{position:fixed;right:22px;bottom:24px;z-index:180;display:inline-flex;align-items:center;justify-content:center;padding:11px 20px;font-size:14px;font-weight:600;color:#fff;background:linear-gradient(135deg,#2a6bff 0%,#0b3aa8 100%);border-radius:999px;box-shadow:0 14px 30px rgba(11,58,168,.34);transition:transform .22s ease,box-shadow .22s ease}
.float-contact:hover{transform:translateY(-3px);box-shadow:0 20px 38px rgba(11,58,168,.42)}
.float-top{position:fixed;right:26px;bottom:84px;z-index:180;width:44px;height:44px;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;color:#0b3aa8;background:#fff;border:1px solid #d6e4ff;border-radius:50%;box-shadow:0 10px 24px rgba(18,64,180,.18);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .25s ease,transform .25s ease,visibility .25s}
.float-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.float-top:hover{background:#eef4ff}

/* ============ Footer ============ */
.site-footer{background:#07204f;color:#c9dbff;padding:54px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:34px}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-logo{max-width:150px;max-height:40px;width:auto;object-fit:contain;background:#fff;padding:6px 10px;border-radius:10px}
.footer-brand p{font-size:13.5px;color:#a9c2ea;line-height:1.8}
.footer-col h3{font-size:14.5px;color:#fff;font-weight:700;margin-bottom:16px;letter-spacing:.4px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col li{font-size:13.5px;line-height:1.6}
.footer-col a{color:#b7cdf0;transition:color .2s ease}
.footer-col a:hover{color:#fff}
.footer-col .plain{color:#9fb8e6}
.footer-links-inline{display:flex;flex-wrap:wrap;gap:8px 14px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:38px;padding:18px 0 22px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12.5px;color:#8fa9d6}
.footer-bottom a{color:#b7cdf0}
.footer-bottom a:hover{color:#fff}

/* ============ Reveal ============ */
.js-ready .reveal{opacity:0;transform:translateY(20px);transition:opacity .65s ease,transform .65s ease}
.js-ready .reveal.is-visible{opacity:1;transform:translateY(0)}

/* ============ Responsive ============ */
@media (max-width:1080px){
  .nav-toggle{display:flex}
  .nav-links{position:absolute;top:calc(100% + 8px);left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:0;padding:10px;background:#fff;border:1px solid #dbe6ff;border-radius:16px;box-shadow:0 22px 44px rgba(18,64,180,.16)}
  .nav-links.is-open{display:flex}
  .nav-links a{padding:12px 14px;font-size:15px;border-radius:10px}
  .hero-inner{grid-template-columns:1fr;gap:34px}
  .hero-lead{max-width:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:980px){
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .review-layout{grid-template-columns:1fr}
  .contact-layout{grid-template-columns:1fr}
}
@media (max-width:760px){
  .section{padding:48px 0}
  .hero{padding:48px 0 42px}
  .grid-2,.grid-3,.grid-4,.case-grid,.steps{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .join-banner{padding:32px 24px}
  .news-item{flex-direction:column;align-items:flex-start;gap:8px}
  .news-item:hover{transform:none}
  .float-contact{right:16px;bottom:18px;padding:10px 16px;font-size:13px}
  .float-top{right:20px;bottom:72px;width:40px;height:40px}
  .qr-box{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js-ready .reveal{opacity:1;transform:none;transition:none}
  .card:hover,.step:hover,.case-item:hover,.review-card:hover,.stat-card:hover,.model-chips li:hover,.tag-cloud li:hover,.news-item:hover,.btn:hover,.float-contact:hover{transform:none}
}