/* 合肥推擎企业官网 - 简约大气风格 */
:root {
  --primary: #1450a3;
  --primary-dark: #0d3a7a;
  --primary-light: #e8f0fb;
  --accent: #0e7c66;
  --text: #23282e;
  --text-light: #6a737d;
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --border: #e3e8ee;
  --radius: 10px;
  --shadow: 0 4px 20px rgba(20, 80, 163, .08);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif; color: var(--text); background: var(--bg); line-height: 1.75; font-size: 16px; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* 顶部导航 */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.96); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; gap: 24px; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--text); }
.logo-mark { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; font-size: 22px; font-weight: 700; border-radius: 10px; }
.logo-text { display: flex; flex-direction: column; line-height: 1.3; }
.logo-text strong { font-size: 19px; letter-spacing: 1px; }
.logo-text em { font-style: normal; font-size: 12px; color: var(--text-light); }
.main-nav { margin-left: auto; }
.main-nav ul { display: flex; list-style: none; gap: 4px; }
.main-nav a { display: block; padding: 8px 14px; color: var(--text); font-size: 15.5px; border-radius: 6px; }
/* 窄屏时收起次要导航栏目（入口保留在页脚"更多内容"） */
@media (max-width: 1240px) {
  .main-nav li.nav-opt { display: none; }
}
.main-nav a:hover, .main-nav li.active a { color: var(--primary); background: var(--primary-light); }
.header-phone { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-weight: 600; font-size: 16px; white-space: nowrap; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; margin-left: auto; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; border-radius: 2px; }

/* 面包屑 */
.breadcrumb { background: var(--bg-alt); border-bottom: 1px solid var(--border); font-size: 13.5px; padding: 10px 0; }
.breadcrumb a { color: var(--text-light); }
.breadcrumb span { color: var(--text-light); }

/* Hero */
.hero { background: linear-gradient(135deg, #0d3a7a 0%, #1450a3 55%, #2563c4 100%); color: #fff; padding: 96px 0 84px; }
.hero-inner { display: flex; align-items: center; justify-content: space-between; gap: 56px; }
.hero-text { flex: 1; min-width: 0; }
.hero h1 { font-size: 44px; line-height: 1.3; font-weight: 700; }
.hero h1 span { font-size: 30px; font-weight: 400; opacity: .92; }
.hero-sub { margin: 22px 0 30px; max-width: 760px; font-size: 17px; opacity: .92; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; margin-top: 38px; }
.hero-tags li { border: 1px solid rgba(255,255,255,.4); border-radius: 999px; padding: 4px 16px; font-size: 14px; opacity: .95; }
.hero-qr { flex-shrink: 0; background: #fff; color: var(--text); border-radius: 16px; padding: 20px 20px 16px; text-align: center; width: 206px; box-shadow: 0 18px 44px rgba(4,18,44,.35); }
.hero-qr img { width: 150px; height: 150px; display: block; margin: 0 auto 10px; border-radius: 8px; }
.hero-qr-text strong { display: block; font-size: 16.5px; color: var(--primary); }
.hero-qr-text span { display: block; font-size: 12.5px; color: var(--text-light); line-height: 1.6; margin-top: 6px; }

.page-hero { background: linear-gradient(135deg, #0d3a7a 0%, #1450a3 60%, #2563c4 100%); color: #fff; padding: 64px 0; }
.page-hero h1 { font-size: 36px; }
.page-hero p { margin-top: 10px; opacity: .9; }

/* 按钮 */
.btn { display: inline-block; padding: 11px 30px; border-radius: 8px; font-size: 16px; cursor: pointer; border: 1px solid transparent; transition: all .2s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.btn-ghost:hover { background: rgba(255,255,255,.12); color: #fff; }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { background: var(--primary-light); }
.center-btn { text-align: center; margin-top: 32px; }

/* 区块 */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head h2 { font-size: 30px; position: relative; display: inline-block; padding-bottom: 14px; }
.section-head h2::after { content: ""; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%); width: 44px; height: 3px; background: var(--primary); border-radius: 2px; }
.section-head p { color: var(--text-light); margin-top: 12px; max-width: 720px; margin-left: auto; margin-right: auto; }

/* 卡片 */
.cards { display: grid; gap: 20px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; display: block; color: var(--text); transition: all .25s; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--primary-light); }
.card h3 { font-size: 19px; margin-bottom: 10px; color: var(--primary-dark); }
.card p { font-size: 14.5px; color: var(--text-light); }
.card .more { display: inline-block; margin-top: 14px; font-size: 14px; color: var(--primary); }

/* 表格 */
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.data-table th, .data-table td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 15px; vertical-align: top; }
.data-table thead th { background: var(--primary); color: #fff; white-space: nowrap; }
.data-table tbody th { background: var(--primary-light); color: var(--primary-dark); white-space: nowrap; width: 1%; }
.data-table tbody tr:last-child td { border-bottom: none; }
.note { margin-top: 18px; font-size: 13.5px; color: var(--text-light); }
.center-text { text-align: center; }

/* 流程 */
.steps { list-style: none; counter-reset: step; max-width: 860px; margin: 0 auto; }
.steps li { display: flex; gap: 18px; padding: 18px 0; border-bottom: 1px dashed var(--border); }
.steps li:last-child { border-bottom: none; }
.step-num { flex: none; width: 36px; height: 36px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 600; }
.steps h4 { font-size: 17px; }
.steps p { font-size: 14.5px; color: var(--text-light); }

/* FAQ */
.faq-list, .faq-preview { max-width: 880px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; }
.section-alt .faq-item { background: #fff; }
.faq-item.open { border-color: var(--primary-light); box-shadow: var(--shadow); }
.faq-q { padding: 18px 22px; font-size: 16.5px; cursor: pointer; position: relative; font-weight: 600; }
.faq-q .faq-icon { position: absolute; right: 20px; top: 50%; transform: translateY(-50%); color: var(--primary); font-size: 22px; transition: transform .2s; }
.faq-item.open .faq-icon { transform: translateY(-50%) rotate(45deg); }
.faq-a { padding: 0 22px; max-height: 0; overflow: hidden; transition: max-height .3s ease, padding .3s ease; }
.faq-item.open .faq-a { padding: 0 22px 18px; max-height: 500px; }
.faq-preview .faq-a { max-height: none; padding: 0 22px 18px; }
.faq-preview .faq-item:not(.open) .faq-a { display: none; }

/* 首页资讯卡片 */
.news-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.news-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 22px; color: var(--text); transition: all .25s; }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--primary-light); }
.news-card-meta { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--text-light); margin-bottom: 10px; flex-wrap: wrap; }
.news-card-tag { background: var(--primary-light); color: var(--primary); border-radius: 999px; padding: 1px 9px; font-size: 12px; }
.news-card h3 { font-size: 17px; line-height: 1.5; margin-bottom: 10px; color: var(--text); }
.news-card:hover h3 { color: var(--primary); }
.news-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; flex: 1; }
.news-card .more { display: inline-block; margin-top: 14px; font-size: 13.5px; color: var(--primary); }

/* 资讯列表 */
.news-list { max-width: 880px; margin: 0 auto; }
.news-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 28px; margin-bottom: 18px; transition: box-shadow .25s; }
.news-item:hover { box-shadow: var(--shadow); }
.news-meta { font-size: 13px; color: var(--text-light); display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.news-meta .news-tags a { display: inline-block; background: var(--primary-light); color: var(--primary); font-size: 12.5px; padding: 2px 10px; border-radius: 999px; margin-left: 6px; }
.news-item h2 { font-size: 20px; margin: 8px 0 10px; }
.news-item h2 a { color: var(--text); }
.news-item h2 a:hover { color: var(--primary); }
.news-item p { font-size: 14.5px; color: var(--text-light); }
.news-item .more { font-size: 14px; }
.empty-tip { text-align: center; color: var(--text-light); padding: 60px 0; }

/* 文章页 */
.article-layout { display: grid; grid-template-columns: 1fr 300px; gap: 32px; align-items: start; }
.article-body { background: #fff; }
.page-hero + .section .article-body { background: none; }
.article-body h2 { font-size: 24px; margin: 34px 0 14px; padding-left: 12px; border-left: 4px solid var(--primary); }
.article-body h2:first-child { margin-top: 0; }
.article-body h3 { font-size: 19px; margin: 26px 0 12px; color: var(--primary-dark); }
.article-body p { margin: 12px 0; color: #333; }
.article-body ul, .article-body ol { margin: 12px 0 12px 24px; }
.article-body li { margin: 8px 0; color: #333; }
.highlight-box { background: var(--primary-light); border-left: 4px solid var(--primary); padding: 16px 20px; border-radius: 0 8px 8px 0; }
.article-tags { font-size: 14px; color: var(--text-light); margin-bottom: 20px; }
.article-tags a { display: inline-block; background: var(--primary-light); color: var(--primary); padding: 2px 12px; border-radius: 999px; margin: 0 6px 6px 0; font-size: 13px; }
.article-content { line-height: 1.9; }
.article-content a { border-bottom: 1px dashed var(--primary); }
.article-nav { margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--border); font-size: 13.5px; color: var(--text-light); }
.article-side { position: sticky; top: 92px; }
.side-box { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 18px; }
.side-box h3 { font-size: 16px; margin-bottom: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.side-box ul { list-style: none; }
.side-box li { margin: 9px 0; }
.side-box li a { font-size: 14px; color: var(--text); }
.side-box li a:hover { color: var(--primary); }

/* CTA */
.cta-band { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); color: #fff; padding: 56px 0; text-align: center; }
.cta-band h2 { font-size: 26px; }
.cta-band p { margin: 12px 0 24px; opacity: .9; }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info ul { list-style: none; }
.contact-info li { margin: 14px 0; padding-left: 0; }
.contact-info li strong { display: block; color: var(--text-light); font-size: 13.5px; font-weight: 500; }
.contact-tip { margin-top: 26px; background: var(--bg-alt); border-radius: var(--radius); padding: 20px 24px; }
.contact-tip h3 { font-size: 16px; margin-bottom: 8px; }
.contact-tip ul { margin-left: 18px; list-style: disc; }
.contact-tip li { margin: 6px 0; font-size: 14.5px; }
.contact-qr { margin-top: 26px; display: flex; align-items: center; gap: 20px; background: var(--primary-light); border-radius: var(--radius); padding: 18px 22px; }
.contact-qr img { width: 128px; height: 128px; border-radius: 8px; background: #fff; padding: 6px; flex-shrink: 0; }
.contact-qr h3 { font-size: 16px; margin-bottom: 6px; }
.contact-qr p { font-size: 14px; line-height: 1.7; color: var(--text-light); }
.contact-form-wrap { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.contact-form-wrap h2 { font-size: 20px; margin-bottom: 18px; }
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-size: 14px; margin-bottom: 6px; color: var(--text-light); }
.form-row input, .form-row textarea { width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 15px; font-family: inherit; }
.form-row input:focus, .form-row textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
.form-msg { margin-left: 12px; font-size: 14px; color: var(--accent); }

/* 页脚 */
.site-footer { background: #1b2430; color: #aab4c0; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.3fr; gap: 32px; padding: 52px 20px 36px; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 14px; }
.footer-about p { font-size: 13.5px; line-height: 1.8; }
.footer-links, .footer-contact { list-style: none; }
.footer-links li, .footer-contact li { margin: 8px 0; font-size: 13.5px; }
.footer-more li { margin: 12px 0; font-size: 14px; }
.footer-links a { color: #aab4c0; }
.footer-links a:hover { color: #fff; }
.footer-qr { margin-top: 14px; background: #fff; border-radius: 10px; padding: 8px; width: 112px; text-align: center; }
.footer-qr img { width: 96px; height: 96px; display: block; border-radius: 6px; }
.footer-qr p { color: #46586e; font-size: 12px; margin-top: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 18px 0; font-size: 12.5px; text-align: center; }
.footer-bottom a { color: #aab4c0; }
.footer-bottom a:hover { color: #fff; text-decoration: underline; }

/* 响应式 */
@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .news-cards { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .article-side { position: static; display: grid; grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-inner { gap: 36px; }
  .hero-qr { width: 180px; padding: 16px 16px 14px; }
  .hero-qr img { width: 132px; height: 132px; }
}
@media (max-width: 768px) {
  .header-inner { height: 62px; }
  .nav-toggle { display: block; }
  .header-phone { display: none; }
  .main-nav { position: absolute; top: 62px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--border); display: none; margin-left: 0; box-shadow: 0 10px 24px rgba(0,0,0,.08); }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; padding: 10px 16px; gap: 2px; }
  .main-nav li.nav-opt { display: block; }
  .main-nav a { padding: 12px 10px; }
  .hero { padding: 60px 0 56px; }
  .hero-inner { flex-direction: column-reverse; align-items: flex-start; gap: 30px; }
  .hero-qr { display: flex; align-items: center; gap: 14px; width: 100%; max-width: 340px; text-align: left; padding: 14px 16px; }
  .hero-qr img { width: 104px; height: 104px; margin: 0; }
  .hero-qr-text strong { font-size: 15px; }
  .hero-qr-text span { margin-top: 5px; }
  .hero h1 { font-size: 30px; }
  .hero h1 span { font-size: 20px; }
  .hero-sub { font-size: 15.5px; }
  .page-hero { padding: 44px 0; }
  .page-hero h1 { font-size: 26px; }
  .section { padding: 48px 0; }
  .section-head h2 { font-size: 24px; }
  .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .article-side { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 22px; padding: 36px 20px 24px; }
  .card { padding: 22px 18px; }
  .steps li { gap: 12px; }
  .news-item { padding: 20px 18px; }
  .btn { padding: 10px 22px; font-size: 15px; }
  .news-cards { grid-template-columns: 1fr; }
  .contact-qr { flex-direction: column; align-items: flex-start; gap: 12px; }
}