*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:92px;}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:#f2f6ff;color:#14204a;line-height:1.7;-webkit-font-smoothing:antialiased;}
h1,h2,h3,h4,p,ul,ol,figure,figcaption{margin:0;padding:0;}
ul,ol{list-style:none;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;height:auto;display:block;}
button{font-family:inherit;}
::selection{background:#1f4bff;color:#fff;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid #dfe7fb;}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:74px;position:relative;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand .ai-page-logo{max-height:42px;width:auto;}
.brand-text{font-size:18px;font-weight:800;letter-spacing:.04em;color:#0b1b4b;white-space:nowrap;}
.main-nav{display:flex;align-items:center;}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:nowrap;}
.nav-links a{display:block;padding:8px 10px;font-size:14.5px;color:#213163;border-radius:9px;white-space:nowrap;transition:color .2s ease,background .2s ease;}
.nav-links a:hover{color:#1f4bff;background:#eef3ff;}
.nav-cta{flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;padding:10px 20px;border-radius:999px;font-size:14.5px;font-weight:600;color:#fff;background:linear-gradient(135deg,#1f4bff,#2f8bff);box-shadow:0 10px 22px rgba(31,75,255,.26);transition:transform .2s ease,box-shadow .2s ease;}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(31,75,255,.34);}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:4px;width:42px;height:42px;padding:0 11px;border:1px solid #dfe7fb;border-radius:10px;background:#fff;cursor:pointer;}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:#1f4bff;}

/* Hero */
.hero{position:relative;overflow:hidden;padding:70px 0 78px;background:linear-gradient(135deg,#081c66 0%,#1b3fe0 50%,#2f8dff 100%);color:#fff;}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;pointer-events:none;}
.hero::before{width:540px;height:540px;top:-240px;right:-150px;background:radial-gradient(circle,rgba(130,205,255,.42),rgba(130,205,255,0) 70%);animation:heroFloat 13s ease-in-out infinite;}
.hero::after{width:430px;height:430px;bottom:-220px;left:-140px;background:radial-gradient(circle,rgba(90,130,255,.5),rgba(90,130,255,0) 70%);animation:heroFloat 17s ease-in-out infinite reverse;}
@keyframes heroFloat{0%,100%{transform:translate3d(0,0,0);}50%{transform:translate3d(0,26px,0);}}
.hero-inner{position:relative;z-index:1;}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 15px;border-radius:999px;font-size:13px;letter-spacing:.05em;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.36);color:#fff;}
.hero h1{font-size:clamp(28px,4.2vw,52px);line-height:1.24;font-weight:800;margin:20px 0 16px;letter-spacing:.01em;}
.hero-lead{max-width:820px;font-size:clamp(15px,1.5vw,18px);color:rgba(255,255,255,.93);}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;border-radius:999px;font-size:15.5px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;}
.btn:hover{transform:translateY(-2px);}
.btn-primary{background:#fff;color:#1330a8;box-shadow:0 14px 30px rgba(4,18,80,.28);}
.btn-primary:hover{box-shadow:0 18px 36px rgba(4,18,80,.34);}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.62);}
.btn-ghost:hover{background:rgba(255,255,255,.24);}
.btn-solid{background:linear-gradient(135deg,#1f4bff,#2f8bff);color:#fff;box-shadow:0 12px 26px rgba(31,75,255,.28);}
.btn-solid:hover{box-shadow:0 16px 32px rgba(31,75,255,.36);}
.hero-note{margin-top:18px;font-size:13.5px;letter-spacing:.04em;color:rgba(255,255,255,.82);}
.hero-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:46px;position:relative;z-index:1;}
.metric{background:#fff;border-radius:16px;padding:18px 20px;box-shadow:0 18px 36px rgba(8,28,102,.24);transition:transform .25s ease,box-shadow .25s ease;}
.metric:hover{transform:translateY(-4px);box-shadow:0 22px 42px rgba(8,28,102,.3);}
.metric strong{display:block;font-size:clamp(21px,2.4vw,30px);line-height:1.2;color:#1f4bff;font-weight:800;}
.metric span{display:block;margin-top:6px;font-size:13.5px;color:#5a6a94;}

/* Sections */
.section{padding:64px 0;}
.section--white{background:#ffffff;}
.section--tint{background:linear-gradient(180deg,#eaf1ff,#f6f9ff);}
.section-head{max-width:780px;margin:0 auto 38px;text-align:center;}
.eyebrow{display:inline-block;padding:5px 14px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.1em;color:#1f4bff;background:#e6eeff;}
.section-head h2{font-size:clamp(22px,3vw,32px);line-height:1.35;margin:14px 0 12px;color:#0b1b4b;font-weight:800;}
.section-head p{color:#5a6a94;font-size:15.5px;}

.cards{display:grid;gap:18px;grid-template-columns:repeat(3,minmax(0,1fr));}
.card{background:#fff;border:1px solid #e2eaff;border-radius:16px;padding:24px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;}
.card:hover{transform:translateY(-4px);box-shadow:0 18px 36px rgba(24,60,180,.12);border-color:#c9d9ff;}
.card h3{font-size:17px;color:#0b1b4b;margin-bottom:8px;font-weight:700;}
.card p{font-size:14.6px;color:#55648f;}

.tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{display:inline-block;padding:7px 15px;border-radius:999px;font-size:13.5px;color:#20305c;background:#eef3ff;border:1px solid #dbe6ff;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;}
.tag:hover{background:#1f4bff;color:#fff;border-color:#1f4bff;transform:translateY(-2px);}

.steps{display:grid;gap:18px;grid-template-columns:repeat(5,minmax(0,1fr));}
.step{background:#fff;border:1px solid #e2eaff;border-radius:16px;padding:24px 20px;transition:transform .25s ease,box-shadow .25s ease;}
.step:hover{transform:translateY(-4px);box-shadow:0 18px 34px rgba(24,60,180,.12);}
.step-no{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;margin-bottom:14px;border-radius:10px;background:#e9f0ff;color:#1f4bff;font-weight:800;font-size:15px;}
.step h3{font-size:16px;color:#0b1b4b;margin-bottom:6px;}
.step p{font-size:14px;color:#55648f;}

.solution{background:#fff;border:1px solid #e2eaff;border-left:4px solid #2f8bff;border-radius:14px;padding:22px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;}
.solution:hover{transform:translateY(-4px);box-shadow:0 18px 34px rgba(24,60,180,.12);border-color:#b9ceff;}
.solution h3{font-size:16.5px;color:#0b1b4b;margin-bottom:6px;}
.solution p{font-size:14.4px;color:#55648f;}

/* Cases */
.case-grid{display:grid;gap:20px;grid-template-columns:repeat(3,minmax(0,1fr));align-items:start;}
.case{background:#fff;border:1px solid #e2eaff;border-radius:16px;overflow:hidden;transition:transform .25s ease,box-shadow .25s ease;}
.case:hover{transform:translateY(-4px);box-shadow:0 18px 36px rgba(24,60,180,.14);}
.case img{width:100%;}
.case figcaption{padding:14px 18px;font-size:14.2px;color:#41527d;}

/* Review score + table */
.score{display:flex;align-items:center;gap:28px;flex-wrap:wrap;padding:28px 30px;border-radius:20px;background:linear-gradient(135deg,#0d2378,#1f4bff 70%,#2f8bff);color:#fff;margin-bottom:26px;box-shadow:0 20px 40px rgba(13,35,120,.24);}
.score-num{font-size:52px;font-weight:800;line-height:1;}
.score-num small{font-size:16px;font-weight:600;opacity:.86;}
.score-info strong{display:block;font-size:18px;margin-bottom:6px;}
.stars{color:#ffd34d;letter-spacing:.16em;font-size:19px;}
.score-info p{color:rgba(255,255,255,.88);font-size:14px;margin-top:6px;}
.table-wrap{overflow-x:auto;border:1px solid #e2eaff;border-radius:16px;background:#fff;}
table{width:100%;border-collapse:collapse;min-width:660px;}
thead th{background:#eef3ff;color:#0b1b4b;font-weight:700;text-align:left;padding:15px 18px;font-size:15px;}
tbody td{padding:14px 18px;border-top:1px solid #eef2fd;font-size:14.6px;color:#41527d;vertical-align:top;}
tbody td:first-child{color:#0b1b4b;font-weight:600;}
tbody tr:hover td{background:#f7faff;}

/* Reviews */
.reviews{display:grid;gap:18px;grid-template-columns:repeat(3,minmax(0,1fr));}
.review{background:#fff;border:1px solid #e2eaff;border-radius:16px;padding:24px;transition:transform .25s ease,box-shadow .25s ease;}
.review:hover{transform:translateY(-4px);box-shadow:0 18px 36px rgba(24,60,180,.12);}
.review-text{font-size:14.6px;color:#41527d;margin-bottom:18px;}
.review figcaption{display:flex;align-items:center;gap:12px;}
.avatar{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:#e9f0ff;color:#1f4bff;font-weight:800;font-size:16px;flex-shrink:0;}
.who strong{display:block;font-size:14.5px;color:#0b1b4b;}
.who em{display:block;font-style:normal;font-size:13px;color:#7285ad;}

/* Articles */
.article-list{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));margin-top:26px;}
.article-item{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 20px;background:#fff;border:1px solid #e2eaff;border-radius:14px;font-size:14.8px;color:#213163;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease;}
.article-item:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(24,60,180,.12);border-color:#b9ceff;color:#1f4bff;}
.article-item span{font-size:13px;color:#8b9ac2;flex-shrink:0;}

/* FAQ */
.faq-list{max-width:900px;margin:0 auto;}
.faq-item{background:#fff;border:1px solid #e2eaff;border-radius:14px;margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;}
.faq-item.open{border-color:#b9ceff;box-shadow:0 14px 30px rgba(24,60,180,.1);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;background:none;border:0;cursor:pointer;text-align:left;font-size:15.8px;font-weight:600;color:#0b1b4b;}
.faq-q:hover{color:#1f4bff;}
.faq-icon{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:#eef3ff;color:#1f4bff;display:inline-flex;align-items:center;justify-content:center;font-size:15px;line-height:1;transition:transform .25s ease,background .25s ease,color .25s ease;}
.faq-item.open .faq-icon{transform:rotate(45deg);background:#1f4bff;color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a p{padding:0 20px 18px;font-size:14.6px;color:#55648f;}

/* Contact */
.contact-grid{display:grid;gap:24px;grid-template-columns:0.9fr 1.1fr;align-items:start;}
.info-card{background:#fff;border:1px solid #e2eaff;border-radius:18px;padding:26px;}
.info-card h3{font-size:17px;color:#0b1b4b;margin-bottom:14px;}
.info-list li{display:flex;gap:10px;font-size:14.6px;color:#41527d;padding:8px 0;border-bottom:1px dashed #e8eefc;}
.info-list li:last-child{border-bottom:0;}
.info-list b{color:#0b1b4b;font-weight:600;flex-shrink:0;}
.qr{margin-top:18px;text-align:center;}
.qr img{width:100%;max-width:176px;margin:0 auto 10px;border:1px solid #e2eaff;border-radius:12px;padding:6px;background:#fff;}
.qr p{font-size:13.5px;color:#7285ad;}
.form-card{background:#fff;border:1px solid #e2eaff;border-radius:18px;padding:26px;box-shadow:0 18px 40px rgba(24,60,180,.08);}
.form-card h3{font-size:17px;color:#0b1b4b;margin-bottom:6px;}
.form-tip{font-size:13.5px;color:#7285ad;margin-bottom:20px;}
.form-row{display:grid;gap:16px;grid-template-columns:1fr 1fr;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:14px;font-weight:600;color:#20305c;margin-bottom:6px;}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1px solid #d8e2f8;border-radius:10px;background:#fbfdff;color:#14204a;font-size:15px;font-family:inherit;transition:border-color .2s ease,box-shadow .2s ease;}
.field textarea{resize:vertical;min-height:110px;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:#1f4bff;box-shadow:0 0 0 3px rgba(31,75,255,.14);}
.form-card .btn{width:100%;}

/* Join banner */
.join-banner{display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;padding:34px 32px;border-radius:22px;background:linear-gradient(120deg,#0b1b4b,#1f4bff 65%,#2f8bff);color:#fff;box-shadow:0 22px 44px rgba(11,27,75,.26);}
.join-banner h2{font-size:clamp(20px,2.6vw,28px);margin-bottom:10px;font-weight:800;}
.join-banner p{font-size:15px;color:rgba(255,255,255,.9);max-width:680px;}

/* Footer */
.site-footer{background:#0b1b4b;color:#c9d6f5;padding:44px 0 0;}
.footer-grid{display:grid;gap:30px;grid-template-columns:1.15fr 1fr;align-items:start;}
.footer-name{font-size:18px;font-weight:800;color:#ffffff;margin-bottom:10px;}
.footer-brand p{font-size:14.4px;color:#c9d6f5;margin-bottom:10px;}
.footer-contact{line-height:1.9;}
.friend-links h3{font-size:15.5px;color:#ffffff;margin-bottom:12px;}
.links{display:flex;flex-wrap:wrap;gap:10px 18px;}
.links a{font-size:14px;color:#a9c4ff;transition:color .2s ease;}
.links a:hover{color:#ffffff;text-decoration:underline;}
.footer-bottom{margin-top:30px;padding:16px 0;border-top:1px solid rgba(169,196,255,.24);font-size:13.5px;color:#93a9d6;text-align:center;}

/* Floating tools */
.float-tools{position:fixed;right:18px;bottom:22px;z-index:120;display:flex;flex-direction:column;align-items:flex-end;gap:10px;}
.kf-btn{border:0;cursor:pointer;padding:12px 18px;border-radius:999px;font-size:14px;font-weight:600;color:#fff;background:linear-gradient(135deg,#1f4bff,#2f8bff);box-shadow:0 12px 26px rgba(11,27,75,.26);transition:transform .2s ease;}
.kf-btn:hover{transform:translateY(-2px);}
.to-top{width:42px;height:42px;border:0;border-radius:50%;background:#fff;color:#1f4bff;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 12px 26px rgba(11,27,75,.2);opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease,transform .2s ease;}
.to-top.show{opacity:1;visibility:visible;}
.to-top:hover{transform:translateY(-2px);}
.kf-panel{position:fixed;right:18px;bottom:130px;width:186px;padding:12px;border-radius:14px;background:#fff;border:1px solid #e2eaff;box-shadow:0 22px 44px rgba(11,27,75,.22);text-align:center;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .25s ease,visibility .25s ease,transform .25s ease;}
.kf-panel.show{opacity:1;visibility:visible;transform:none;}
.kf-panel img{width:100%;max-width:150px;margin:0 auto 8px;border-radius:8px;}
.kf-panel p{font-size:12.5px;color:#55648f;}

/* Reveal */
html.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;}
html.js .reveal.visible{opacity:1;transform:none;}

/* Responsive */
@media (max-width:1080px){
  .cards{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps{grid-template-columns:repeat(3,minmax(0,1fr));}
  .case-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .reviews{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:1024px){
  .nav-links{display:none;}
  .nav-links.open{display:flex;flex-direction:column;align-items:stretch;position:absolute;top:calc(100% + 8px);left:16px;right:16px;padding:10px;border:1px solid #dfe7fb;border-radius:14px;background:#fff;box-shadow:0 24px 48px rgba(11,27,75,.16);gap:0;}
  .nav-links.open a{padding:11px 14px;font-size:15px;}
  .nav-toggle{display:flex;}
  .nav-cta{display:none;}
  .hero-metrics{grid-template-columns:repeat(2,minmax(0,1fr));}
  .contact-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
}
@media (max-width:860px){
  .section{padding:52px 0;}
  .hero{padding:56px 0 62px;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:640px){
  .cards,.steps,.case-grid,.reviews{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
  .score{padding:22px;gap:18px;}
  .score-num{font-size:42px;}
  .join-banner{padding:26px 22px;}
  .brand-text{font-size:16px;}
}