/* ===== 鼎元融合 - 东营企业IT解决方案（对齐 build.py 的 HTML class） ===== */
:root{
  --blue:#1677ff; --blue-d:#0958d9; --cyan:#22d3ee;
  --ink:#1a2233; --gray:#5a6478; --line:#e6eaf0;
  --bg:#ffffff; --soft:#f5f8fc; --dark:#0b1426;
  --radius:14px; --shadow:0 8px 30px rgba(20,50,100,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);line-height:1.7;background:var(--bg)}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
.container{max-width:1160px;margin:0 auto;padding:0 20px}
section{position:relative}

/* 渐入动画 */
.reveal{opacity:0;transform:translateY(36px);transition:.7s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ===== Header / Nav ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:.3s}
.header.scrolled{box-shadow:var(--shadow)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:var(--ink);letter-spacing:.5px}
.logo .cube{width:32px;height:32px;background:linear-gradient(135deg,var(--blue),var(--cyan));border-radius:8px;position:relative;flex-shrink:0;animation:spin 8s linear infinite;display:inline-flex;align-items:center;justify-content:center;color:#fff}
.logo .brand{color:var(--blue)}
.nav{display:flex;gap:6px;align-items:center}
.nav li{list-style:none}
.nav a{position:relative;padding:8px 14px;font-size:15px;color:var(--ink);font-weight:500;border-radius:8px;transition:.2s;display:inline-block}
.nav a:hover,.nav a.active{color:var(--blue);background:rgba(22,119,255,.07)}
.has-dropdown{position:relative}
.dropdown{position:absolute;top:100%;left:0;min-width:190px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:8px 0;opacity:0;visibility:hidden;transform:translateY(8px);transition:.25s;z-index:50}
.has-dropdown:hover .dropdown,.has-dropdown:focus-within .dropdown{opacity:1;visibility:visible;transform:none}
.dropdown li a{padding:9px 18px;display:block;font-size:14px;border-radius:0}
.dropdown li a:hover{background:rgba(22,119,255,.06);color:var(--blue)}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px;background:none;border:none}
.burger i{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.3s;display:block}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:10px;font-weight:600;font-size:15px;border:none;cursor:pointer;transition:.25s;white-space:nowrap;text-decoration:none}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 6px 18px rgba(22,119,255,.3)}
.btn-primary:hover{background:var(--blue-d);transform:translateY(-2px);box-shadow:0 10px 24px rgba(22,119,255,.4);color:#fff}
.btn-ghost{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.6)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.12)}
.btn-sm{padding:8px 18px;font-size:14px}

/* ===== Hero ===== */
.hero{min-height:640px;display:flex;align-items:center;padding:120px 0 80px;color:#fff;overflow:hidden;background:radial-gradient(1200px 600px at 80% -10%,#1e3a8a 0%,transparent 60%),radial-gradient(900px 500px at 0% 100%,#0e7490 0%,transparent 55%),linear-gradient(135deg,#0b1426 0%,#111c3a 55%,#0b2447 100%)}
.hero .container{display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:center}
.hero-txt{position:relative;z-index:2}
.hero h1{font-size:44px;line-height:1.25;font-weight:800;margin-bottom:20px;letter-spacing:.5px}
.hero h1 em{font-style:normal;color:var(--cyan);position:relative;display:inline-block}
.hero h1 em::after{content:"";position:absolute;left:0;bottom:-4px;width:100%;height:3px;background:var(--cyan);border-radius:2px;animation:underline 2.4s ease-in-out infinite}
.hero .lead{font-size:18px;color:rgba(255,255,255,.82);max-width:560px;margin-bottom:30px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:34px}
.hero-tags span{padding:7px 15px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:30px;font-size:14px;color:rgba(255,255,255,.9)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:36px;margin-top:46px;flex-wrap:wrap}
.hero-stats .st{animation:fadeUp .8s both}
.hero-stats .st:nth-child(2){animation-delay:.12s}
.hero-stats .st:nth-child(3){animation-delay:.24s}
.hero-stats .st:nth-child(4){animation-delay:.36s}
.hero-stats strong{font-size:34px;display:block;color:var(--cyan);font-weight:800}
.hero-stats small{font-size:13px;color:rgba(255,255,255,.7)}
.hero-visual{position:relative;height:380px}
.float-card{position:absolute;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:16px;padding:16px 18px;display:flex;align-items:center;gap:12px;backdrop-filter:blur(6px);animation:floatY 4s ease-in-out infinite}
.float-card i{font-size:24px;color:var(--cyan)}
.float-card b{font-size:14px;display:block}
.float-card small{font-size:12px;color:rgba(255,255,255,.65)}
.fc1{top:10px;left:20px;animation-delay:0s}
.fc2{top:90px;right:10px;animation-delay:.6s}
.fc3{top:190px;left:60px;animation-delay:1.2s}
.fc4{bottom:70px;right:30px;animation-delay:1.8s}
.fc5{bottom:0;left:30px;animation-delay:.4s}
.hero-orb{position:absolute;width:200px;height:200px;border-radius:50%;background:conic-gradient(from 0deg,var(--blue),var(--cyan),var(--blue));top:50%;left:50%;transform:translate(-50%,-50%);filter:blur(2px);opacity:.5;animation:spin 12s linear infinite}

/* ===== 通用 section ===== */
.sec{padding:84px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 52px}
.sec-head .tag{display:inline-block;color:var(--blue);font-weight:700;font-size:13px;letter-spacing:2px;margin-bottom:10px;text-transform:uppercase}
.sec-head h2{font-size:34px;font-weight:800;margin-bottom:14px;letter-spacing:.5px}
.sec-head p{color:var(--gray);font-size:16px}

/* 服务卡片 grid8 / card */
.grid8{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;transition:.3s;position:relative;overflow:hidden;display:block;color:inherit}
.card::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--blue),var(--cyan));transform:scaleX(0);transform-origin:left;transition:.35s}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:transparent}
.card:hover::before{transform:scaleX(1)}
.card .ic{width:60px;height:60px;border-radius:14px;background:rgba(22,119,255,.09);display:flex;align-items:center;justify-content:center;font-size:26px;color:var(--blue);margin-bottom:18px;transition:.3s}
.card:hover .ic{background:var(--blue);color:#fff}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--gray);font-size:14.5px;margin-bottom:14px}
.card .more,.card .sc-more{color:var(--blue);font-weight:600;font-size:14px}
.card .more i,.card .sc-more i{transition:.25s}
.card:hover .more i,.card:hover .sc-more i{transform:translateX(4px)}

/* 优势 grid4 / feat */
.why{background:var(--soft)}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feat{background:#fff;border-radius:var(--radius);padding:32px 24px;text-align:center;box-shadow:0 4px 20px rgba(20,50,100,.05);transition:.3s}
.feat:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.feat .ic{width:68px;height:68px;margin:0 auto 18px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--cyan));display:flex;align-items:center;justify-content:center;font-size:28px;color:#fff}
.feat h4{font-size:18px;margin-bottom:8px}
.feat p{color:var(--gray);font-size:14px}

/* 流程 steps / step */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.step{text-align:center;padding:0 10px;position:relative}
.step .num{width:56px;height:56px;margin:0 auto 16px;border-radius:50%;background:var(--blue);color:#fff;font-size:22px;font-weight:800;display:flex;align-items:center;justify-content:center;position:relative;z-index:2;box-shadow:0 6px 16px rgba(22,119,255,.3)}
.step:not(:last-child)::after{content:"";position:absolute;top:28px;left:55%;width:90%;height:2px;background:linear-gradient(90deg,var(--blue),var(--cyan));z-index:1}
.step h4{font-size:17px;margin-bottom:6px}
.step p{color:var(--gray);font-size:14px}

/* CTA */
.cta{background:linear-gradient(135deg,#0b1426,#12306b 60%,#0e7490);color:#fff;text-align:center;padding:74px 0;border-radius:0}
.cta h2{font-size:30px;margin-bottom:14px}
.cta p{color:rgba(255,255,255,.8);font-size:16px;margin-bottom:28px}

/* 页内页 hero */
.page-hero{padding:150px 0 70px;color:#fff;text-align:center;background:radial-gradient(800px 400px at 50% 0%,#1e3a8a 0%,transparent 70%),linear-gradient(135deg,#0b1426,#0f2752)}
.page-hero h1{font-size:38px;font-weight:800;margin-bottom:12px}
.page-hero p{color:rgba(255,255,255,.8);font-size:16px;max-width:640px;margin:0 auto}
.bread{display:flex;gap:8px;justify-content:center;font-size:14px;color:rgba(255,255,255,.6);margin-bottom:16px}
.bread a:hover{color:var(--cyan)}

/* 服务详情 srv-intro / price-note */
.srv-intro{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.srv-intro .txt h2{font-size:28px;margin-bottom:16px}
.srv-intro .txt p{color:var(--gray);margin-bottom:18px}
.srv-intro ul{display:grid;gap:12px}
.srv-intro li{display:flex;gap:10px;align-items:flex-start}
.srv-intro li i{color:var(--blue);margin-top:4px}
.price-note{background:var(--soft);border-radius:var(--radius);padding:22px 26px;margin-top:22px;border-left:4px solid var(--blue)}
.price-note b{color:var(--blue)}

/* 关于数据 about-stats */
.about-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin:44px 0}
.about-stats .st{text-align:center;padding:28px 16px;background:var(--soft);border-radius:var(--radius)}
.about-stats strong{font-size:40px;color:var(--blue);font-weight:800;display:block}
.about-stats small{font-size:14px;color:var(--gray)}

/* 案例 toolbar / filters / case */
.toolbar{display:flex;justify-content:flex-start;align-items:center;flex-wrap:wrap;gap:16px;margin-bottom:36px}
.filters{display:flex;gap:10px;flex-wrap:wrap}
.filter{padding:8px 20px;border-radius:30px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:14px;font-weight:500;transition:.25s;color:var(--ink)}
.filter:hover{border-color:var(--blue)}
.filter.active{background:var(--cyan);border-color:var(--cyan);color:#00333a;font-weight:700}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);transition:.3s;background:#fff}
.case:hover{transform:translateY(-8px);box-shadow:var(--shadow)}
.case .thumb{height:180px;display:flex;align-items:center;justify-content:center;font-size:52px;color:rgba(255,255,255,.85);position:relative}
.case .thumb::after{content:"";position:absolute;inset:0;background:rgba(0,0,0,.15)}
.case .cat{position:absolute;top:14px;left:14px;z-index:2;background:rgba(255,255,255,.95);padding:4px 12px;border-radius:20px;font-size:12px;font-weight:700;color:var(--blue)}
.case .body{padding:22px}
.case .body h3{font-size:18px;margin-bottom:8px}
.case .body p{color:var(--gray);font-size:14px;margin-bottom:14px}
.case .meta{display:flex;gap:14px;font-size:13px;color:var(--gray);flex-wrap:wrap}
.case .meta span{display:flex;align-items:center;gap:5px}

/* 文章 articles / article-item / side */
.articles{display:grid;grid-template-columns:2.4fr 1fr;gap:36px}
.article-list{display:grid;gap:22px}
.article-item{display:grid;grid-template-columns:200px 1fr;gap:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s}
.article-item:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.article-item .thumb{background:linear-gradient(135deg,var(--blue),var(--cyan));min-height:150px;display:flex;align-items:center;justify-content:center;font-size:40px;color:#fff}
.article-item .txt{padding:20px 22px}
.article-item .cat{display:inline-block;color:var(--blue);font-size:13px;font-weight:600;margin-bottom:8px}
.article-item h3{font-size:19px;margin-bottom:8px;line-height:1.4}
.article-item p{color:var(--gray);font-size:14px;margin-bottom:12px}
.article-item .meta{font-size:13px;color:var(--gray);display:flex;gap:16px;flex-wrap:wrap}
.side .widget{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:22px}
.side h4{font-size:17px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.side .search{display:flex;gap:8px}
.side .search input{flex:1;padding:10px 14px;border:1px solid var(--line);border-radius:8px;font-size:14px}
.side .search button{background:var(--blue);color:#fff;border:none;padding:0 16px;border-radius:8px;cursor:pointer}
.side .cats li{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px}
.side .cats li:last-child{border:none}
.side .cats li a:hover{color:var(--blue)}
.side .cats li span{color:var(--gray);font-size:13px}
.side .popular li{padding:11px 0;border-bottom:1px solid var(--line);font-size:14px;line-height:1.5}
.side .popular li:last-child{border:none}
.side .tags{display:flex;flex-wrap:wrap;gap:8px}
.side .tags a{padding:5px 13px;background:var(--soft);border-radius:20px;font-size:13px;transition:.2s}
.side .tags a:hover{background:var(--blue);color:#fff}

/* 文章详情 article-full */
.article-full .head{margin-bottom:28px}
.article-full .cat{color:var(--blue);font-weight:700;font-size:14px}
.article-full h1{font-size:32px;margin:12px 0;line-height:1.4}
.article-full .meta{color:var(--gray);font-size:14px;display:flex;gap:18px;flex-wrap:wrap}
.article-full .content h2{font-size:22px;margin:32px 0 14px;padding-left:12px;border-left:4px solid var(--blue)}
.article-full .content p{margin-bottom:16px;color:#2a3346}
.article-full .content ul{margin:0 0 18px 20px}
.article-full .content li{margin-bottom:8px}

/* 联系方式 contact-info / info-item / map / form */
.contact-info{list-style:none}
.contact-info li{display:flex;gap:10px;align-items:center;margin-bottom:12px;font-size:14.5px}
.contact-info li i{color:var(--blue);width:18px;text-align:center}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.info-box{display:grid;gap:20px}
.info-item{display:flex;gap:16px;align-items:flex-start;padding:22px;background:var(--soft);border-radius:var(--radius)}
.info-item .ic{width:48px;height:48px;border-radius:12px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.info-item h4{font-size:16px;margin-bottom:4px}
.info-item p{color:var(--gray);font-size:14px}
.map{height:260px;border-radius:var(--radius);overflow:hidden;margin-top:20px;background:linear-gradient(135deg,#dbeafe,#e0f2fe);display:flex;align-items:center;justify-content:center;color:var(--blue);font-size:16px;font-weight:600}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form input,.form select,.form textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:9px;font-size:14px;font-family:inherit;margin-bottom:16px;transition:.2s}
.form input:focus,.form select,.form textarea:focus{border-color:var(--blue);outline:none;box-shadow:0 0 0 3px rgba(22,119,255,.12)}
.form textarea{height:120px;resize:vertical}

/* 回到顶部 */
.top{position:fixed;bottom:28px;right:28px;width:46px;height:46px;border-radius:50%;background:var(--blue);color:#fff;border:none;cursor:pointer;font-size:18px;box-shadow:var(--shadow);opacity:0;transform:translateY(20px);transition:.3s;z-index:99}
.top.show{opacity:1;transform:none}

/* ===== Footer ===== */
.footer{background:var(--dark);color:rgba(255,255,255,.78);padding:64px 0 0}
.footer .grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.footer .logo,.logo-light{color:#fff !important;margin-bottom:16px}
.logo-light .cube{animation:none}
.footer .logo .brand,.logo-light .brand{color:var(--cyan)}
.footer p{font-size:14px;margin-bottom:18px}
.footer h5{color:#fff;font-size:16px;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer h5::after{content:"";position:absolute;left:0;bottom:0;width:32px;height:2px;background:var(--cyan)}
.footer ul{list-style:none}
.footer ul li{margin-bottom:10px;font-size:14px}
.footer ul li a:hover{color:var(--cyan)}
.footer .social{display:flex;gap:12px;margin-top:8px}
.footer .social a{width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;font-size:16px;transition:.25s;color:rgba(255,255,255,.8)}
.footer .social a:hover{background:var(--cyan);color:var(--dark)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:44px;padding:22px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.5)}

/* ===== 动画 ===== */
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}
@keyframes underline{0%,100%{width:100%}50%{width:40%}}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .hero .container,.srv-intro,.contact-grid{grid-template-columns:1fr}
  .hero-visual{height:300px;order:-1}
  .grid8{grid-template-columns:repeat(2,1fr)}
  .grid4,.steps{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .articles{grid-template-columns:1fr}
  .step:not(:last-child)::after{display:none}
  .burger{display:flex}
  .nav{position:fixed;top:70px;left:0;right:0;background:#fff;flex-direction:column;padding:20px;gap:4px;box-shadow:var(--shadow);transform:translateY(-150%);transition:.35s;visibility:hidden}
  .nav.open{transform:none;visibility:visible}
  .dropdown{position:static;box-shadow:none;opacity:1;visibility:visible;transform:none;display:none}
  .has-dropdown:hover .dropdown{display:block}
}
@media(max-width:640px){
  .grid8,.grid4,.steps,.case-grid,.about-stats{grid-template-columns:1fr}
  .sec{padding:56px 0}
  .sec-head h2{font-size:25px}
  .article-item{grid-template-columns:1fr}
  .article-item .thumb{min-height:120px}
  .form .row{grid-template-columns:1fr}
  .footer .grid{grid-template-columns:1fr}
  .page-hero h1{font-size:27px}
  .hero{padding:110px 0 60px;min-height:auto}
  .hero h1{font-size:29px}
  .hero-stats{gap:20px}
  .hero-stats strong{font-size:26px}
}