:root{
  --brand:#2f5bff;
  --brand-2:#12b0d8;
  --ink:#0f1b3a;
  --text:#3b4763;
  --muted:#6b7793;
  --line:#e2e9f8;
  --card:#ffffff;
  --radius:18px;
  --shadow-sm:0 10px 26px -20px rgba(20,40,100,.55);
  --shadow-md:0 22px 46px -26px rgba(20,40,100,.6);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:15px;
  line-height:1.75;
  color:var(--text);
  background-color:#f4f7ff;
  background-image:
    radial-gradient(900px 520px at 6% -8%, #dfe9ff 0%, rgba(223,233,255,0) 60%),
    radial-gradient(820px 480px at 96% 0%, #d8f4f3 0%, rgba(216,244,243,0) 58%),
    radial-gradient(900px 560px at 50% 112%, #e8e2ff 0%, rgba(232,226,255,0) 62%);
  background-attachment:fixed;
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;border:0;}
a{color:var(--brand);}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.35;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}
section[id]{scroll-margin-top:88px;}

/* 动效 */
.js .reveal{opacity:0;transform:translateY(20px);transition:opacity .7s cubic-bezier(.22,.8,.3,1),transform .7s cubic-bezier(.22,.8,.3,1);}
.js .reveal.is-in{opacity:1;transform:none;}
@keyframes heroUp{from{opacity:0;transform:translateY(24px);}to{opacity:1;transform:none;}}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:999px;border:1px solid transparent;
  font-size:14.5px;font-weight:600;text-decoration:none;cursor:pointer;
  transition:transform .22s ease,box-shadow .25s ease,background .25s ease,color .25s ease,border-color .25s ease;
}
.btn-primary{background:linear-gradient(135deg,#2f5bff,#12b0d8);color:#fff;box-shadow:0 12px 26px -12px rgba(47,91,255,.72);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 32px -14px rgba(47,91,255,.85);}
.btn-ghost{background:#fff;color:#1b2a4d;border-color:#cfd9f2;}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.btn-lg{padding:14px 32px;font-size:16px;}
.btn-sm{padding:9px 18px;font-size:13.5px;}

/* 头部 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:70px;position:relative;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:700;font-size:16px;white-space:nowrap;}
.ai-page-logo{display:block;max-width:132px;height:auto;max-height:40px;}
.nav-links{display:flex;align-items:center;gap:0;margin-left:auto;}
.nav-links a{display:block;padding:9px 11px;font-size:14px;color:#41506e;text-decoration:none;border-radius:9px;white-space:nowrap;transition:color .2s,background .2s;}
.nav-links a:hover{color:var(--brand);background:#eef3ff;}
.nav-cta{padding:9px 18px;font-size:14px;margin-left:10px;}
.nav-toggle{display:none;width:42px;height:38px;flex-direction:column;align-items:center;justify-content:center;gap:4px;background:#fff;border:1px solid var(--line);border-radius:10px;cursor:pointer;}
.nav-toggle span{display:block;width:16px;height:2px;background:#2b3a5c;border-radius:2px;}

/* 通用区块 */
.section{padding:68px 0;}
.section-tint{background:linear-gradient(180deg,rgba(255,255,255,.9),rgba(255,255,255,.55));}
.section-head{max-width:800px;margin-bottom:34px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{display:inline-block;padding:6px 13px;border-radius:999px;background:#eaf0ff;border:1px solid #dbe6ff;color:#2c4a9e;font-size:12.5px;font-weight:600;letter-spacing:.06em;}
.section-head h2{font-size:clamp(22px,3vw,31px);margin:14px 0 10px;}
.section-head p{color:var(--muted);font-size:15px;line-height:1.85;}

.grid{display:grid;gap:20px;}
.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:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8d7ff;}
.card h3{font-size:17px;margin-bottom:8px;}
.card p{font-size:14.5px;color:var(--muted);line-height:1.78;}
.icon-box{width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e8efff,#d9f4f4);color:#2447c8;margin-bottom:14px;}
.icon-box svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.tag{display:inline-block;padding:4px 10px;border-radius:999px;background:#eef3ff;border:1px solid #dbe6ff;color:#2c4a9e;font-size:12.5px;}

/* Hero */
.hero{position:relative;overflow:hidden;padding:70px 0 58px;}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;pointer-events:none;}
.hero::before{width:560px;height:560px;top:-230px;right:-150px;background:radial-gradient(circle at 35% 35%,rgba(47,91,255,.20),rgba(47,91,255,0) 68%);}
.hero::after{width:470px;height:470px;bottom:-230px;left:-170px;background:radial-gradient(circle at 60% 40%,rgba(18,194,201,.22),rgba(18,194,201,0) 68%);}
.hero-inner{position:relative;z-index:2;max-width:830px;margin:0 auto;text-align:center;}
.hero-inner>*{animation:heroUp .8s cubic-bezier(.22,.8,.3,1) both;}
.hero-inner>*:nth-child(1){animation-delay:.05s;}
.hero-inner>*:nth-child(2){animation-delay:.13s;}
.hero-inner>*:nth-child(3){animation-delay:.21s;}
.hero-inner>*:nth-child(4){animation-delay:.29s;}
.hero-inner>*:nth-child(5){animation-delay:.37s;}
.hero h1{font-size:clamp(27px,4.6vw,45px);letter-spacing:-.5px;margin:18px 0 16px;}
.hero-sub{font-size:clamp(14.5px,1.6vw,16.5px);color:#4c5a7b;line-height:1.9;max-width:720px;margin:0 auto;}
.hero-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:30px;}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:26px;}
.hero-metrics{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:48px;}
.metric{background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:16px;padding:18px 16px;text-align:center;box-shadow:var(--shadow-sm);transition:transform .28s ease,box-shadow .28s ease;}
.metric:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);}
.metric strong{display:block;font-size:21px;color:var(--ink);letter-spacing:-.3px;}
.metric span{display:block;font-size:13px;color:var(--muted);margin-top:4px;}

/* 关于 */
.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:start;}
.about-text p{color:var(--muted);font-size:15px;line-height:1.9;margin-bottom:14px;}
.about-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm);}
.about-panel h3{font-size:17px;margin-bottom:16px;}
.about-list li{display:flex;gap:10px;align-items:flex-start;padding:9px 0;border-bottom:1px dashed #e8eefb;font-size:14.5px;color:#43506e;}
.about-list li:last-child{border-bottom:0;}
.about-list li::before{content:"";flex:0 0 8px;width:8px;height:8px;margin-top:9px;border-radius:50%;background:linear-gradient(135deg,#2f5bff,#12b0d8);}

/* 场景矩阵 */
.scene-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(232px,1fr));gap:16px;}
.scene{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow-sm);transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;}
.scene:hover{transform:translateY(-3px);border-color:#c8d7ff;box-shadow:var(--shadow-md);}
.scene h3{font-size:15.5px;margin-bottom:6px;}
.scene p{font-size:13.5px;color:var(--muted);line-height:1.72;}

/* 流程 */
.flow{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px;}
.flow-step{position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px 18px;box-shadow:var(--shadow-sm);transition:transform .26s ease,box-shadow .26s ease;}
.flow-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
.flow-step .num{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:11px;background:linear-gradient(135deg,#2f5bff,#12b0d8);color:#fff;font-size:14px;font-weight:700;margin-bottom:12px;}
.flow-step h3{font-size:15.5px;margin-bottom:6px;}
.flow-step p{font-size:13.5px;color:var(--muted);line-height:1.7;}

/* 案例 */
.case-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .28s ease,box-shadow .28s ease;}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
.case-media{aspect-ratio:16/10;background:#eef3ff;overflow:hidden;}
.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-body{padding:16px 18px 20px;}
.case-body h3{font-size:15.5px;margin-bottom:6px;}
.case-body p{font-size:13.5px;color:var(--muted);line-height:1.7;}

/* 表格 */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-sm);}
table{width:100%;border-collapse:collapse;min-width:720px;font-size:14px;}
thead th{background:#f1f5ff;color:var(--ink);font-weight:700;text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);white-space:nowrap;}
tbody td{padding:13px 16px;border-bottom:1px solid #eef2fb;color:#4a5775;vertical-align:top;}
tbody tr:last-child td{border-bottom:0;}
tbody tr:hover td{background:#f8faff;}
td.strong{color:#1c3fb8;font-weight:600;}

/* 评分 */
.score-card{display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:center;background:linear-gradient(135deg,#eef4ff,#e6fbfa);border:1px solid #d6e5ff;border-radius:20px;padding:26px 28px;margin-bottom:24px;}
.score-num{text-align:center;padding-right:24px;border-right:1px dashed #c6d8f7;}
.score-num strong{display:block;font-size:42px;line-height:1.1;color:#1c3fb8;letter-spacing:-1px;}
.score-num span{font-size:13px;color:#5a6a8c;}
.score-info h3{font-size:18px;margin-bottom:8px;}
.score-info p{font-size:14.5px;color:#4a5775;}
.stars{color:#ff9a2e;letter-spacing:3px;font-size:17px;margin-top:8px;display:inline-block;}

/* FAQ */
.faq-list{display:grid;gap:12px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:0 20px;box-shadow:var(--shadow-sm);transition:border-color .25s ease,box-shadow .25s ease;}
.faq-item:hover{border-color:#c8d7ff;}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 0;font-size:15px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";flex:0 0 24px;width:24px;height:24px;line-height:22px;text-align:center;border-radius:8px;background:#eef3ff;color:#2c4a9e;font-size:16px;font-weight:600;}
.faq-item[open] summary::after{content:"−";}
.faq-item[open]{border-color:#c8d7ff;}
.faq-body{padding:0 0 16px;color:var(--muted);font-size:14.5px;line-height:1.85;}

/* 评论 */
.review-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:var(--shadow-sm);transition:transform .26s ease,box-shadow .26s ease;}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
.review-card .stars{font-size:14px;letter-spacing:2px;margin:0 0 10px;}
.review-card p{font-size:14.5px;color:#4a5775;line-height:1.85;}
.review-user{display:flex;align-items:center;gap:10px;margin-top:16px;padding-top:14px;border-top:1px dashed #e8eefb;}
.avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#2f5bff,#12b0d8);color:#fff;font-size:14px;font-weight:700;}
.review-user strong{display:block;font-size:14px;color:var(--ink);font-weight:600;}
.review-user span{font-size:12.5px;color:var(--muted);}

/* 百科 */
.wiki-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;}
.wiki-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow-sm);transition:transform .25s ease,border-color .25s ease;}
.wiki-item:hover{transform:translateY(-3px);border-color:#c8d7ff;}
.wiki-item h3{font-size:14.5px;margin-bottom:6px;}
.wiki-item p{font-size:13px;color:var(--muted);line-height:1.7;}

/* 资讯 */
.news-list{display:grid;gap:12px;}
.news-item{display:flex;align-items:center;justify-content:space-between;gap:16px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 20px;box-shadow:var(--shadow-sm);text-decoration:none;transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;}
.news-item:hover{transform:translateX(4px);border-color:#c8d7ff;box-shadow:var(--shadow-md);}
.news-item span{font-size:14.5px;color:#33405f;font-weight:600;}
.news-item em{font-style:normal;font-size:13px;color:var(--brand);white-space:nowrap;}

/* 联系与表单 */
.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:24px;align-items:start;}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm);}
.contact-card h3{font-size:17px;margin-bottom:16px;}
.contact-row{display:flex;gap:10px;padding:9px 0;font-size:14.5px;color:#43506e;border-bottom:1px dashed #e8eefb;word-break:break-all;}
.contact-row:last-of-type{border-bottom:0;}
.contact-row b{flex:0 0 76px;color:var(--ink);font-weight:600;}
.qr-box{margin-top:18px;padding-top:18px;border-top:1px dashed #e8eefb;text-align:center;}
.qr-box img{width:132px;height:auto;display:block;margin:0 auto 8px;border-radius:10px;border:1px solid var(--line);}
.qr-box p{font-size:13px;color:var(--muted);}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm);}
.form-card h3{font-size:17px;margin-bottom:6px;}
.form-card>p{font-size:13.5px;color:var(--muted);margin-bottom:18px;}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.form-field{display:flex;flex-direction:column;gap:6px;}
.form-field.full{grid-column:1 / -1;}
.form-field label{font-size:13.5px;font-weight:600;color:var(--ink);}
.form-field input,.form-field select,.form-field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;font-size:14.5px;color:var(--text);background:#fbfcff;font-family:inherit;transition:border-color .2s,box-shadow .2s,background .2s;}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(47,91,255,.13);}
.form-field textarea{min-height:112px;resize:vertical;}
.form-actions{grid-column:1 / -1;display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.form-actions small{font-size:12.5px;color:var(--muted);}

/* 浮动 */
.float-dock{position:fixed;right:18px;bottom:22px;z-index:80;display:flex;flex-direction:column;align-items:flex-end;gap:10px;}
.dock-btn{display:inline-flex;align-items:center;gap:6px;padding:11px 16px;border-radius:999px;border:1px solid #cfdcff;background:#fff;color:#2246c5;font-size:14px;font-weight:600;cursor:pointer;box-shadow:0 12px 28px -14px rgba(30,60,150,.55);transition:transform .2s ease,box-shadow .2s ease;}
.dock-btn:hover{transform:translateY(-2px);box-shadow:0 18px 32px -16px rgba(30,60,150,.7);}
.service-panel{width:228px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:var(--shadow-md);text-align:center;}
.service-panel img{width:150px;height:auto;display:block;margin:0 auto 10px;border-radius:10px;}
.service-panel p{margin:3px 0;font-size:13px;color:var(--muted);}
.service-panel strong{color:var(--ink);}

/* 页脚 */
.site-footer{background:#eef3ff;border-top:1px solid #dde6fa;padding:46px 0 0;margin-top:0;}
.footer-top{display:grid;grid-template-columns:1fr 1.35fr;gap:32px;padding-bottom:28px;}
.footer-brand p{font-size:14px;color:#4a5775;line-height:1.85;margin-top:14px;max-width:360px;}
.footer-brand .ai-page-home-link{display:inline-block;margin-top:12px;font-size:14px;font-weight:600;color:#2246c5;text-decoration:none;}
.footer-brand .ai-page-home-link:hover{text-decoration:underline;}
.footer-links h3{font-size:15px;margin-bottom:14px;color:var(--ink);}
.footer-links ul{display:flex;flex-wrap:wrap;gap:10px 18px;}
.footer-links a{font-size:13.5px;color:#3f4e70;text-decoration:none;transition:color .2s;}
.footer-links a:hover{color:#2246c5;}
.footer-bottom{border-top:1px solid #dbe5f9;padding:16px 0 20px;text-align:center;}
.footer-bottom p{font-size:13px;color:#5a6a8c;line-height:1.9;}
.footer-bottom a{color:#2246c5;text-decoration:none;}
.footer-bottom a:hover{text-decoration:underline;}

@media (max-width:1080px){
  .nav-links a{padding:9px 9px;font-size:13.5px;}
  .grid-4,.wiki-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .flow{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (max-width:980px){
  .nav-links{
    position:absolute;top:100%;left:0;right:0;margin-left:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--line);border-radius:0 0 16px 16px;
    padding:8px 16px 16px;display:none;box-shadow:0 20px 30px -22px rgba(20,40,100,.5);
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:11px 12px;font-size:14.5px;}
  .nav-toggle{display:flex;}
  .nav-cta{margin-left:0;padding:8px 14px;font-size:13.5px;}
  .hero-metrics{grid-template-columns:repeat(2,minmax(0,1fr));}
  .about-grid{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-top{grid-template-columns:1fr;gap:22px;}
  .grid-3,.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:660px){
  .section{padding:52px 0;}
  .hero{padding:52px 0 44px;}
  .grid-2,.grid-3,.grid-4,.wiki-grid,.flow{grid-template-columns:minmax(0,1fr);}
  .hero-metrics{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;}
  .form-grid{grid-template-columns:minmax(0,1fr);}
  .score-card{grid-template-columns:1fr;gap:16px;}
  .score-num{padding-right:0;padding-bottom:16px;border-right:0;border-bottom:1px dashed #c6d8f7;}
  .news-item{flex-direction:column;align-items:flex-start;gap:6px;}
  .float-dock{right:12px;bottom:14px;}
  .service-panel{width:206px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
  .js .reveal{opacity:1;transform:none;}
}