*,*::before,*::after{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","Helvetica Neue",Arial,sans-serif;
  font-size:15.5px;
  line-height:1.75;
  color:#131a2b;
  background-color:#f5f7ff;
  background-image:
    radial-gradient(900px 520px at 8% -4%, rgba(79,107,255,.16), transparent 62%),
    radial-gradient(760px 480px at 96% 6%, rgba(255,122,89,.13), transparent 60%),
    radial-gradient(820px 620px at 50% 46%, rgba(6,201,194,.10), transparent 62%),
    radial-gradient(900px 560px at 12% 96%, rgba(139,92,246,.14), transparent 62%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol{margin:0;padding:0;}
ul,ol{list-style:none;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;}
section[id],div[id].anchor{scroll-margin-top:86px;}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}
.section{padding:66px 0;}
.sec-head{max-width:760px;margin-bottom:32px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;font-weight:700;letter-spacing:.16em;
  color:#4a5aa8;margin-bottom:12px;
}
.sec-kicker::before{content:"";width:26px;height:3px;border-radius:3px;background:linear-gradient(90deg,#4f6bff,#06c9c2);}
.sec-head.center .sec-kicker{justify-content:center;}
.sec-head h2{font-size:clamp(22px,3vw,30px);line-height:1.36;font-weight:800;letter-spacing:-.01em;color:#111a2e;margin-bottom:12px;}
.sec-head p{color:#4c5670;font-size:15px;}

/* 按钮 */
.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:600;cursor:pointer;
  transition:translate .22s ease, box-shadow .24s ease, border-color .22s ease, background .22s ease;
  font-family:inherit;
}
.btn:hover{translate:0 -2px;}
.btn:active{translate:0 0;}
.btn-primary{
  background:linear-gradient(120deg,#4f6bff,#8b5cf6 55%,#06c9c2);
  color:#fff;box-shadow:0 16px 30px rgba(79,107,255,.30);
}
.btn-primary:hover{box-shadow:0 20px 38px rgba(79,107,255,.40);}
.btn-ghost{background:#fff;color:#25304d;border-color:#dfe6f7;box-shadow:0 4px 14px rgba(24,36,80,.06);}
.btn-ghost:hover{border-color:#bfcdf4;box-shadow:0 10px 24px rgba(24,36,80,.10);}
.btn-sm{padding:10px 20px;font-size:14px;}

/* 头部导航 */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(226,232,246,.9);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:14px;min-height:68px;position:relative;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.ai-page-logo{display:block;width:132px;height:auto;max-width:100%;}
.brand-name{font-size:16.5px;font-weight:800;letter-spacing:.02em;color:#141c32;white-space:nowrap;}
.nav{display:flex;align-items:center;gap:0;}
.nav-links{display:flex;align-items:center;gap:0;margin:0;padding:0;}
.nav-links a{
  display:block;padding:9px 8px;font-size:14px;font-weight:500;
  color:#2b3450;border-radius:10px;white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:#3d5afe;background:rgba(79,107,255,.08);}
.nav-cta{
  margin-left:14px;padding:9px 18px;border-radius:999px;
  background:linear-gradient(120deg,#4f6bff,#8b5cf6);color:#fff;
  font-size:14px;font-weight:600;white-space:nowrap;
  box-shadow:0 10px 22px rgba(79,107,255,.30);
  transition:translate .2s ease,box-shadow .2s ease;
}
.nav-cta:hover{translate:0 -2px;box-shadow:0 14px 28px rgba(79,107,255,.40);}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;border:1px solid #e2e8f6;
  background:#fff;color:#2b3450;cursor:pointer;
}
.nav-toggle svg{width:20px;height:20px;}

/* Hero */
.hero{position:relative;padding:62px 0 70px;overflow:hidden;}
.hero-inner{display:grid;grid-template-columns:1.12fr .88fr;gap:46px;align-items:center;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;border-radius:999px;
  background:rgba(255,255,255,.85);
  border:1px solid rgba(79,107,255,.22);
  color:#3b49a5;font-size:13px;font-weight:600;
  box-shadow:0 6px 18px rgba(79,107,255,.10);
  margin-bottom:20px;
}
.hero-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:linear-gradient(135deg,#4f6bff,#06c9c2);}
.hero h1{
  font-size:clamp(29px,4.4vw,46px);
  line-height:1.24;font-weight:800;letter-spacing:-.015em;
  color:#0f172b;margin-bottom:18px;
}
.hero-lead{color:#48536e;font-size:16px;max-width:580px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.hero-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;}
.stat{
  background:rgba(255,255,255,.9);
  border:1px solid #e7ecf8;border-radius:14px;
  padding:14px 12px;text-align:center;
  box-shadow:0 6px 18px rgba(24,36,80,.05);
  transition:translate .25s ease,box-shadow .25s ease;
}
.stat:hover{translate:0 -4px;box-shadow:0 14px 30px rgba(24,36,80,.11);}
.stat strong{display:block;font-size:21px;font-weight:800;color:#22307a;line-height:1.2;}
.stat span{display:block;font-size:12.5px;color:#5a6480;margin-top:4px;}

.hero-visual{position:relative;}
.visual-glow{
  position:absolute;border-radius:50%;filter:blur(28px);pointer-events:none;z-index:0;
}
.glow-a{width:210px;height:210px;top:-34px;right:8px;background:rgba(79,107,255,.34);animation:floatA 9s ease-in-out infinite;}
.glow-b{width:180px;height:180px;bottom:-26px;left:-10px;background:rgba(6,201,194,.30);animation:floatB 11s ease-in-out infinite;}
@keyframes floatA{0%,100%{transform:translate3d(0,0,0);}50%{transform:translate3d(-14px,18px,0);}}
@keyframes floatB{0%,100%{transform:translate3d(0,0,0);}50%{transform:translate3d(16px,-16px,0);}}
.model-panel{
  position:relative;z-index:1;
  background:linear-gradient(160deg,rgba(255,255,255,.96),rgba(246,249,255,.92));
  border:1px solid #e4eaf9;border-radius:22px;
  padding:22px;box-shadow:0 26px 60px rgba(24,36,80,.14);
}
.model-panel-head{display:flex;align-items:center;gap:9px;font-size:13.5px;font-weight:700;color:#2b3450;margin-bottom:16px;}
.model-panel-head .dot{width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,#4f6bff,#06c9c2);box-shadow:0 0 0 4px rgba(79,107,255,.14);}
.model-tags{display:flex;flex-wrap:wrap;gap:8px;}
.model-tags li{
  font-size:12.5px;font-weight:500;color:#2c3a72;
  padding:5px 11px;border-radius:999px;
  background:rgba(79,107,255,.07);
  border:1px solid rgba(79,107,255,.13);
  transition:background .22s ease,color .22s ease,translate .22s ease;
}
.model-tags li:hover{background:rgba(79,107,255,.16);color:#1b2a6b;translate:0 -2px;}
.model-panel-foot{
  margin-top:16px;padding-top:14px;border-top:1px dashed #dfe6f7;
  font-size:13px;color:#5a6480;
}

/* 通用网格与卡片 */
.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));}
.card{
  background:#fff;border:1px solid #e7ecf8;border-radius:18px;padding:22px;
  box-shadow:0 4px 16px rgba(24,36,80,.05);
  transition:translate .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.card:hover{translate:0 -6px;box-shadow:0 18px 38px rgba(24,36,80,.12);border-color:#d3dcf6;}
.card h3{font-size:16px;font-weight:700;color:#16203a;margin-bottom:8px;line-height:1.45;}
.card p{font-size:14px;color:#4c5670;}

/* 关于 */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:30px;align-items:start;}
.about-copy p{color:#48536e;font-size:15px;margin-bottom:14px;}
.about-copy p:last-child{margin-bottom:0;}
.about-list{display:grid;gap:12px;}
.about-list li{
  display:flex;gap:12px;align-items:flex-start;
  background:#fff;border:1px solid #e7ecf8;border-radius:14px;
  padding:14px 16px;box-shadow:0 4px 14px rgba(24,36,80,.04);
  transition:translate .24s ease,box-shadow .24s ease;
}
.about-list li:hover{translate:0 -3px;box-shadow:0 12px 26px rgba(24,36,80,.10);}
.about-list li::before{
  content:"";flex:0 0 auto;width:8px;height:8px;margin-top:9px;border-radius:50%;
  background:linear-gradient(135deg,#4f6bff,#06c9c2);
}
.about-list b{font-weight:700;color:#16203a;display:block;font-size:14.5px;margin-bottom:2px;}
.about-list span{font-size:13.5px;color:#525d78;}

/* 服务卡片 */
.svc-card{display:flex;flex-direction:column;}
.svc-icon{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(135deg,#4f6bff,#8b5cf6);color:#fff;margin-bottom:14px;
  box-shadow:0 10px 22px rgba(79,107,255,.26);
}
.svc-icon svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.svc-card:nth-child(3n+2) .svc-icon{background:linear-gradient(135deg,#8b5cf6,#ec4899);box-shadow:0 10px 22px rgba(139,92,246,.26);}
.svc-card:nth-child(3n+3) .svc-icon{background:linear-gradient(135deg,#06c9c2,#4f6bff);box-shadow:0 10px 22px rgba(6,201,194,.26);}

/* 能力胶囊 */
.pill-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.pill{
  padding:8px 16px;border-radius:999px;font-size:13.5px;font-weight:600;
  color:#2c3a72;background:rgba(255,255,255,.92);
  border:1px solid #e0e7f7;box-shadow:0 4px 12px rgba(24,36,80,.05);
  transition:translate .2s ease,border-color .2s ease;
}
.pill:hover{translate:0 -3px;border-color:#bfcdf4;}

/* 步骤卡 */
.step-card{position:relative;padding-top:26px;}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:12px;font-size:14px;font-weight:800;
  color:#fff;background:linear-gradient(135deg,#4f6bff,#06c9c2);
  margin-bottom:14px;box-shadow:0 10px 22px rgba(79,107,255,.24);
}

/* 时间线 */
.timeline{position:relative;padding-left:26px;}
.timeline::before{
  content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,rgba(79,107,255,.55),rgba(6,201,194,.35));
}
.timeline li{position:relative;padding:0 0 22px 0;}
.timeline li:last-child{padding-bottom:0;}
.timeline li::before{
  content:"";position:absolute;left:-26px;top:8px;width:12px;height:12px;border-radius:50%;
  background:#fff;border:3px solid #4f6bff;box-shadow:0 0 0 4px rgba(79,107,255,.12);
}
.timeline h3{font-size:15.5px;font-weight:700;color:#16203a;margin-bottom:4px;}
.timeline p{font-size:14px;color:#4c5670;}

/* 案例图 */
.case-card{padding:0;overflow:hidden;display:flex;flex-direction:column;}
.case-media{
  width:100%;aspect-ratio:16/10;background:#f2f5fd;
  display:flex;align-items:center;justify-content:center;overflow:hidden;
}
.case-media.square{aspect-ratio:1/1;}
.case-media img{width:100%;height:100%;object-fit:contain;display:block;}
.case-body{padding:18px 20px 20px;}
.case-body h3{font-size:15.5px;font-weight:700;color:#16203a;margin-bottom:6px;}
.case-body p{font-size:13.6px;color:#4c5670;}
.gallery-media{
  width:100%;aspect-ratio:16/10;background:#f2f5fd;border-radius:14px;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
.gallery-media img{width:100%;height:100%;object-fit:contain;display:block;}

/* 评论区 */
.review-card{display:flex;flex-direction:column;gap:12px;}
.review-top{display:flex;align-items:center;gap:12px;}
.avatar{
  width:42px;height:42px;border-radius:50%;flex:0 0 auto;
  display:grid;place-items:center;color:#fff;font-weight:700;font-size:15px;
  background:linear-gradient(135deg,#4f6bff,#8b5cf6);
}
.review-card:nth-child(3n+2) .avatar{background:linear-gradient(135deg,#06c9c2,#4f6bff);}
.review-card:nth-child(3n+3) .avatar{background:linear-gradient(135deg,#ff7a59,#8b5cf6);}
.review-name{font-size:14.5px;font-weight:700;color:#16203a;line-height:1.3;}
.review-role{font-size:12.5px;color:#6a748e;}
.review-text{font-size:14px;color:#3f4a66;}
.stars{color:#ff9a3d;font-size:13px;letter-spacing:2px;}

/* 评测 */
.score-panel{
  display:grid;grid-template-columns:auto 1fr;gap:26px;align-items:center;
  background:linear-gradient(120deg,rgba(79,107,255,.10),rgba(6,201,194,.10));
  border:1px solid #dce5fb;border-radius:20px;padding:26px;margin-bottom:24px;
}
.score-main{text-align:center;}
.score-num{font-size:44px;font-weight:800;line-height:1;color:#22307a;}
.score-num small{font-size:16px;font-weight:700;color:#5a6480;}
.score-stars{color:#ff9a3d;font-size:16px;letter-spacing:3px;margin:8px 0 4px;}
.score-tip{font-size:13px;color:#4c5670;}
.score-desc h3{font-size:17px;font-weight:800;color:#16203a;margin-bottom:8px;}
.score-desc p{font-size:14px;color:#42506e;}

/* 表格 */
.table-wrap{
  overflow-x:auto;border:1px solid #e7ecf8;border-radius:18px;background:#fff;
  box-shadow:0 8px 26px rgba(24,36,80,.06);
}
table{border-collapse:collapse;width:100%;min-width:680px;font-size:14px;}
thead th{
  background:#f3f6ff;color:#22307a;font-weight:700;text-align:left;
  padding:14px 16px;white-space:nowrap;border-bottom:1px solid #e7ecf8;
}
thead th.hl{background:linear-gradient(120deg,rgba(79,107,255,.16),rgba(6,201,194,.14));color:#1b2a6b;}
tbody td{padding:13px 16px;border-bottom:1px solid #f0f3fb;color:#42506e;vertical-align:top;}
tbody tr:last-child td{border-bottom:none;}
tbody tr:hover td{background:#fafbff;}
tbody td.hl{color:#16203a;font-weight:600;background:rgba(79,107,255,.04);}
tbody tr:hover td.hl{background:rgba(79,107,255,.09);}

/* 百科 / 资讯列表 */
.term-card h3{font-size:15px;}
.article-list{display:grid;gap:10px;}
.article-list a{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  background:#fff;border:1px solid #e7ecf8;border-radius:14px;
  padding:14px 18px;font-size:14.5px;color:#22304f;font-weight:500;
  transition:translate .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.article-list a::after{content:"›";font-size:20px;color:#8f9ab8;line-height:1;transition:color .22s ease;}
.article-list a:hover{translate:0 -3px;border-color:#c8d4f5;box-shadow:0 12px 26px rgba(24,36,80,.09);}
.article-list a:hover::after{color:#4f6bff;}

/* FAQ */
.faq-list{display:grid;gap:12px;}
.faq-item{
  background:#fff;border:1px solid #e7ecf8;border-radius:16px;
  box-shadow:0 4px 16px rgba(24,36,80,.05);overflow:hidden;
}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;background:none;border:none;cursor:pointer;text-align:left;
  font-size:15px;font-weight:600;color:#16203a;font-family:inherit;
  transition:color .2s ease;
}
.faq-q:hover{color:#3d5afe;}
.faq-mark{
  flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .3s ease;
}
.faq-mark::before,.faq-mark::after{
  content:"";position:absolute;left:50%;top:50%;background:#4f6bff;border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-mark::before{width:12px;height:2px;}
.faq-mark::after{width:2px;height:12px;transition:opacity .3s ease;}
.faq-item.open .faq-mark{transform:rotate(180deg);}
.faq-item.open .faq-mark::after{opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;}
.faq-a p{padding:0 20px 18px;font-size:14px;color:#4c5670;}

/* 加盟横幅 */
.partner-banner{
  background:linear-gradient(120deg,#1c2a6b,#3b4bd6 45%,#0f8f96);
  border-radius:22px;padding:34px 30px;color:#fff;
  display:grid;grid-template-columns:1fr auto;gap:26px;align-items:center;
  box-shadow:0 26px 60px rgba(28,42,107,.30);
}
.partner-banner h2{font-size:clamp(20px,2.6vw,26px);font-weight:800;margin-bottom:10px;color:#fff;}
.partner-banner p{font-size:14.5px;color:rgba(255,255,255,.86);max-width:640px;}
.partner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;}
.partner-tags span{
  padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);color:#fff;
}
.btn-light{background:#fff;color:#1b2a6b;box-shadow:0 14px 30px rgba(0,0,0,.18);}
.btn-light:hover{box-shadow:0 18px 36px rgba(0,0,0,.24);}

/* 联系与表单 */
.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:start;}
.contact-form{
  background:#fff;border:1px solid #e7ecf8;border-radius:20px;padding:26px;
  box-shadow:0 10px 30px rgba(24,36,80,.07);
  display:grid;grid-template-columns:1fr 1fr;gap:16px;
}
.field{display:flex;flex-direction:column;gap:7px;}
.field-full{grid-column:1 / -1;}
.field label{font-size:13.5px;font-weight:600;color:#2b3450;}
.field input,.field select,.field textarea{
  width:100%;padding:11px 14px;font-size:14px;font-family:inherit;color:#16203a;
  background:#f8faff;border:1px solid #dfe6f7;border-radius:12px;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{resize:vertical;min-height:104px;}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:#8fa5f2;background:#fff;box-shadow:0 0 0 4px rgba(79,107,255,.12);
}
.contact-form .btn{grid-column:1 / -1;justify-self:start;}
.form-note{grid-column:1 / -1;font-size:12.5px;color:#6a748e;}

.contact-card{
  background:#fff;border:1px solid #e7ecf8;border-radius:20px;padding:24px;
  box-shadow:0 10px 30px rgba(24,36,80,.07);
}
.contact-card h3{font-size:16px;font-weight:700;color:#16203a;margin-bottom:16px;}
.contact-list{display:grid;gap:11px;margin-bottom:20px;}
.contact-list li{display:flex;align-items:center;gap:12px;font-size:14px;color:#42506e;}
.contact-list span{
  flex:0 0 72px;font-size:12.5px;color:#6a748e;
  padding:3px 0;
}
.contact-list b{color:#16203a;font-weight:700;}
.contact-list a{color:#3d5afe;font-weight:600;}
.qr-box{
  border-top:1px dashed #e2e8f6;padding-top:18px;text-align:center;
}
.qr-img{width:146px;margin:0 auto 10px;border-radius:14px;overflow:hidden;border:1px solid #e7ecf8;background:#f8faff;}
.qr-img img{display:block;width:100%;height:auto;}
.qr-box p{font-size:13px;color:#5a6480;}

/* 帮助中心 */
.help-card{display:flex;flex-direction:column;gap:8px;}
.help-card h3{font-size:15.5px;}
.help-link{font-size:13.5px;font-weight:600;color:#3d5afe;display:inline-flex;align-items:center;gap:6px;}
.help-link::after{content:"→";transition:translate .2s ease;}
.help-link:hover::after{translate:4px 0;}

/* 页脚 */
.site-footer{
  margin-top:0;padding:44px 0 26px;
  background:linear-gradient(160deg,#131a2b,#1b2544 60%,#152039);
  color:#c7d0e6;
}
.footer-top{display:grid;grid-template-columns:1.3fr .7fr;gap:30px;padding-bottom:24px;border-bottom:1px solid rgba(255,255,255,.10);}
.footer-name{font-size:18px;font-weight:800;color:#fff;margin-bottom:8px;letter-spacing:.02em;}
.footer-desc{font-size:13.5px;color:#a9b4cf;max-width:520px;margin-bottom:10px;}
.footer-contact{font-size:13px;color:#b6c0d8;}
.footer-title{font-size:13px;font-weight:700;color:#fff;margin-bottom:10px;letter-spacing:.06em;}
.footer-link-row{display:flex;flex-wrap:wrap;gap:8px 16px;}
.footer-link-row a{font-size:13.5px;color:#a9b4cf;transition:color .2s ease;}
.footer-link-row a:hover{color:#fff;}
.footer-friend{padding:20px 0;border-bottom:1px solid rgba(255,255,255,.10);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;
  padding-top:18px;font-size:13px;color:#93a0bd;
}
.footer-bottom a{color:#b9c4dd;}
.footer-bottom a:hover{color:#fff;}

/* 浮动工具 */
.float-tools{position:fixed;right:16px;bottom:24px;z-index:90;display:flex;flex-direction:column;gap:12px;align-items:flex-end;}
.float-btn{
  width:48px;height:48px;border-radius:50%;border:none;cursor:pointer;
  display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,#4f6bff,#8b5cf6);
  box-shadow:0 14px 30px rgba(79,107,255,.36);
  transition:translate .22s ease,box-shadow .22s ease,opacity .25s ease;
}
.float-btn svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;}
.float-btn:hover{translate:0 -3px;box-shadow:0 18px 36px rgba(79,107,255,.46);}
.float-btn.back-top{background:linear-gradient(135deg,#5c6b8a,#39435c);box-shadow:0 12px 26px rgba(35,45,70,.28);opacity:0;pointer-events:none;}
.float-btn.back-top.show{opacity:1;pointer-events:auto;}
.kefu-panel{
  position:fixed;right:16px;bottom:124px;z-index:95;width:250px;
  background:#fff;border:1px solid #e7ecf8;border-radius:18px;padding:18px;
  box-shadow:0 26px 60px rgba(24,36,80,.22);
  opacity:0;visibility:hidden;translate:0 12px;
  transition:opacity .26s ease,translate .26s ease,visibility .26s ease;
}
.kefu-panel.open{opacity:1;visibility:visible;translate:0 0;}
.kefu-panel h4{font-size:14px;font-weight:700;color:#16203a;margin-bottom:12px;}
.kefu-panel .qr-img{width:100%;max-width:180px;margin:0 auto 10px;}
.kefu-lines{display:grid;gap:6px;font-size:12.5px;color:#4c5670;text-align:center;}

/* 动效 */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1);}
.reveal.in{opacity:1;transform:none;}

/* 响应式 */
@media (max-width:1060px){
  .nav-toggle{display:inline-flex;}
  .nav{
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-top:1px solid #eef2fb;
    padding:8px 20px 18px;display:none;
    box-shadow:0 24px 44px rgba(24,36,80,.14);
  }
  .nav.open{display:flex;}
  .nav-links{flex-direction:column;align-items:stretch;gap:0;width:100%;}
  .nav-links a{padding:12px 4px;border-bottom:1px solid #f1f4fc;border-radius:0;}
  .nav-cta{margin:14px 0 0;text-align:center;}
}
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;gap:34px;}
  .about-grid{grid-template-columns:1fr;gap:22px;}
  .contact-grid{grid-template-columns:1fr;}
  .partner-banner{grid-template-columns:1fr;}
  .footer-top{grid-template-columns:1fr;gap:22px;}
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .score-panel{grid-template-columns:1fr;gap:18px;text-align:center;}
}
@media (max-width:640px){
  body{font-size:15px;}
  .section{padding:50px 0;}
  .hero{padding:42px 0 54px;}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));}
  .contact-form{grid-template-columns:1fr;padding:20px;}
  .contact-form .btn{width:100%;}
  .brand-name{display:none;}
  .ai-page-logo{width:112px;}
  .partner-banner{padding:26px 20px;}
  .btn{width:100%;}
  .hero-actions .btn{width:100%;}
  .float-tools{right:12px;bottom:18px;}
  .kefu-panel{right:12px;left:12px;width:auto;bottom:118px;}
}