/* ===== 山东站群共享基础样式 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.7;
  color: #333;
  background: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color .2s ease; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
:root {
  --primary: #1e6fb8;
  --primary-dark: #0d4a85;
  --primary-light: #4f9adb;
  --accent: #f5a623;
  --bg-soft: #f5f8fc;
  --text-main: #2c3e50;
  --text-sub: #5a6c7d;
  --border: #e5ecf3;
  --shadow: 0 6px 24px rgba(15, 40, 80, .08);
  --radius: 10px;
  --container: 1240px;
}

/* 顶部导航+Banner 一体化 */
.header-banner {
  position: relative;
  min-height: 560px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  overflow: hidden;
}
.header-banner::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at top right, rgba(255,255,255,.12), transparent 60%),
              radial-gradient(ellipse at bottom left, rgba(0,0,0,.18), transparent 50%);
  pointer-events: none;
}
.header-banner::after {
  content: "";
  position: absolute; right: -120px; top: -120px;
  width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(255,255,255,.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.top-bar {
  position: relative; z-index: 10;
  background: rgba(0,0,0,.18);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.top-bar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 8px 24px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px;
  color: rgba(255,255,255,.85);
}
.top-bar a:hover { color: #fff; }

.nav-wrap {
  position: relative; z-index: 10;
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 78px;
}
.logo {
  display: flex; align-items: center; gap: 0;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 1px;
  color: #fff;
  white-space: nowrap;
}
.logo .logo-main, .logo .logo-sub {
  font-size: 26px;
  font-weight: 700;
}
.logo .logo-divider {
  font-size: 26px;
  margin: 0 14px;
  opacity: .85;
  font-weight: 300;
}
.logo-icon {
  width: 42px; height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, #fff 0%, #e8f1fb 100%);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  font-size: 22px; font-weight: 800;
  margin-right: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,.18);
}
.nav-menu {
  display: flex; gap: 4px;
}
.nav-menu a {
  display: block;
  padding: 10px 18px;
  color: rgba(255,255,255,.92);
  font-size: 15px;
  font-weight: 500;
  border-radius: 6px;
  transition: all .2s ease;
  position: relative;
}
.nav-menu a:hover, .nav-menu a.active {
  background: rgba(255,255,255,.15);
  color: #fff;
}
.nav-menu a.active::after {
  content: ""; position: absolute; left: 50%; bottom: 2px;
  width: 18px; height: 2px; background: #fff;
  transform: translateX(-50%); border-radius: 2px;
}
.nav-cta {
  background: #fff;
  color: var(--primary);
  padding: 9px 18px;
  border-radius: 22px;
  font-weight: 600;
  font-size: 14px;
  display: inline-flex; align-items: center; gap: 6px;
  transition: all .2s ease;
  box-shadow: 0 4px 14px rgba(0,0,0,.12);
}
.nav-cta:hover { background: var(--accent); color: #fff; transform: translateY(-1px); }

.hero {
  position: relative; z-index: 5;
  max-width: var(--container);
  margin: 0 auto;
  padding: 80px 24px 100px;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 60px;
  align-items: center;
}
.hero h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 22px;
  text-shadow: 0 2px 12px rgba(0,0,0,.18);
}
.hero h1 .accent { color: var(--accent); }
.hero p.lead {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(255,255,255,.92);
  margin-bottom: 28px;
  max-width: 560px;
}
.hero-cta {
  display: flex; gap: 14px; flex-wrap: wrap;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  transition: all .25s ease;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 18px rgba(245,166,35,.42);
}
.btn-primary:hover { background: #e8981c; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(245,166,35,.5); }
.btn-ghost {
  background: rgba(255,255,255,.16);
  color: #fff;
  border: 1px solid rgba(255,255,255,.4);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { background: rgba(255,255,255,.28); }

.hero-card {
  background: rgba(255,255,255,.97);
  color: var(--text-main);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 20px 50px rgba(0,0,0,.22);
  position: relative;
  transform: rotate(1.2deg);
}
.hero-card::before {
  content: ""; position: absolute; top: -10px; left: 24px;
  width: 60px; height: 4px; background: var(--accent); border-radius: 2px;
}
.hero-card h3 { font-size: 19px; margin-bottom: 18px; color: var(--primary-dark); }
.hero-card ul li {
  padding: 9px 0; border-bottom: 1px dashed #d8e3ee; display: flex; align-items: center; gap: 10px;
  font-size: 14px; color: var(--text-sub);
}
.hero-card ul li:last-child { border-bottom: none; }
.hero-card .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  flex-shrink: 0;
}
.hero-stats {
  display: flex; gap: 30px;
  margin-top: 26px; padding-top: 22px;
  border-top: 1px solid #e5ecf3;
}
.hero-stats .stat .num {
  font-size: 26px; font-weight: 800; color: var(--primary);
}
.hero-stats .stat .label { font-size: 12px; color: var(--text-sub); margin-top: 2px; }

/* 通用板块 */
.section {
  padding: 70px 24px;
}
.section.alt { background: var(--bg-soft); }
.container { max-width: var(--container); margin: 0 auto; }
.section-head {
  text-align: center;
  margin-bottom: 50px;
}
.section-head .eyebrow {
  display: inline-block;
  padding: 5px 14px;
  background: rgba(30,111,184,.1);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: 14px;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  position: relative;
  display: inline-block;
}
.section-head h2::after {
  content: ""; display: block; width: 50px; height: 3px;
  background: var(--primary); margin: 12px auto 0; border-radius: 2px;
}
.section-head p {
  font-size: 15px;
  color: var(--text-sub);
  max-width: 680px; margin: 0 auto;
}

/* 产品展示 */
.product-tabs {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 10px;
  margin-bottom: 36px;
}
.product-tab {
  padding: 8px 18px; border-radius: 22px;
  background: #fff; color: var(--text-sub);
  font-size: 14px; font-weight: 500;
  border: 1px solid var(--border);
  cursor: pointer; transition: all .2s ease;
}
.product-tab:hover { color: var(--primary); border-color: var(--primary); }
.product-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.product-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .3s ease;
  cursor: pointer;
  position: relative;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 14px 32px rgba(15, 40, 80, .14);
  border-color: var(--primary-light);
}
.product-card .img-wrap {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: #eaf1f8;
}
.product-card .img-wrap img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .5s ease;
}
.product-card:hover .img-wrap img { transform: scale(1.08); }
.product-card .img-wrap::after {
  content: "\2922"; position: absolute; right: 10px; bottom: 10px;
  width: 32px; height: 32px; border-radius: 50%;
  background: rgba(255,255,255,.92);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: var(--primary);
  opacity: 0; transition: opacity .3s ease;
}
.product-card:hover .img-wrap::after { opacity: 1; }
.product-card .info { padding: 16px 18px 20px; }
.product-card .info h3 {
  font-size: 15px; font-weight: 700;
  color: var(--text-main); margin-bottom: 6px;
  line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-card .info p {
  font-size: 12.5px; color: var(--text-sub); line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-card .tag {
  position: absolute; left: 12px; top: 12px;
  background: rgba(30,111,184,.92);
  color: #fff; font-size: 11px; font-weight: 600;
  padding: 3px 8px; border-radius: 4px;
  z-index: 2;
}

/* 关于我们 */
.about-grid {
  display: grid; grid-template-columns: 1fr 1.1fr; gap: 50px; align-items: center;
}
.about-img {
  position: relative; border-radius: var(--radius); overflow: hidden;
  aspect-ratio: 4/3; box-shadow: var(--shadow);
}
.about-img img { width: 100%; height: 100%; object-fit: cover; }
.about-img .badge {
  position: absolute; left: 20px; bottom: 20px;
  background: rgba(255,255,255,.95); color: var(--primary);
  padding: 12px 18px; border-radius: 10px;
  font-weight: 700; font-size: 14px;
  box-shadow: 0 6px 18px rgba(0,0,0,.16);
}
.about-img .badge strong { font-size: 22px; display: block; color: var(--primary-dark); }
.about-text h2 { font-size: 30px; margin-bottom: 18px; color: var(--text-main); }
.about-text .lead-text { font-size: 15px; color: var(--text-sub); margin-bottom: 14px; line-height: 1.85; }
.about-features {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 22px;
}
.about-features .ft {
  background: #fff; padding: 16px; border-radius: 8px;
  border-left: 3px solid var(--primary);
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
}
.about-features .ft h4 { font-size: 14px; color: var(--primary-dark); margin-bottom: 4px; }
.about-features .ft p { font-size: 12.5px; color: var(--text-sub); line-height: 1.5; }

/* 优势板块 */
.advantage-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.advantage-card {
  background: #fff;
  padding: 30px 24px;
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--border);
  transition: all .3s ease;
  position: relative; overflow: hidden;
}
.advantage-card::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px;
  background: var(--primary); transform: scaleX(0); transform-origin: left;
  transition: transform .3s ease;
}
.advantage-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: transparent; }
.advantage-card:hover::before { transform: scaleX(1); }
.advantage-icon {
  width: 64px; height: 64px; margin: 0 auto 18px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 16px; display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 28px;
  box-shadow: 0 6px 16px rgba(30,111,184,.28);
}
.advantage-card h3 { font-size: 17px; margin-bottom: 10px; color: var(--text-main); }
.advantage-card p { font-size: 13px; color: var(--text-sub); line-height: 1.65; }

/* 应用场景 */
.scene-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.scene-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  aspect-ratio: 4/3; cursor: pointer;
}
.scene-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.scene-card:hover img { transform: scale(1.08); }
.scene-card::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(0,0,0,.7));
}
.scene-card .scene-text {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 20px; color: #fff; z-index: 2;
}
.scene-card .scene-text h3 { font-size: 17px; margin-bottom: 4px; }
.scene-card .scene-text p { font-size: 12.5px; opacity: .9; }

/* FAQ */
.faq-list { max-width: 920px; margin: 0 auto; }
.faq-item {
  background: #fff; border: 1px solid var(--border);
  border-radius: 8px; margin-bottom: 12px;
  overflow: hidden; transition: all .2s ease;
}
.faq-item:hover { border-color: var(--primary-light); }
.faq-q {
  padding: 18px 22px; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 15px; font-weight: 600; color: var(--text-main);
  user-select: none;
}
.faq-q .num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--primary); color: #fff; font-size: 12px; font-weight: 700;
  margin-right: 12px; flex-shrink: 0;
}
.faq-q .toggle {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--bg-soft); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; transition: transform .3s ease;
  flex-shrink: 0; margin-left: 12px;
}
.faq-item.open .faq-q .toggle { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-a {
  max-height: 0; overflow: hidden; transition: max-height .3s ease;
  padding: 0 22px; color: var(--text-sub); font-size: 14px; line-height: 1.85;
}
.faq-item.open .faq-a { max-height: 600px; padding: 0 22px 20px; }

/* 子站链接 */
.sister-sites {
  background: #fff; border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow);
  border-top: 4px solid var(--primary);
}
.sister-sites h3 {
  font-size: 18px; color: var(--primary-dark); margin-bottom: 18px;
  display: flex; align-items: center; gap: 8px;
}
.sister-sites h3::before { content: ""; width: 4px; height: 18px; background: var(--primary); border-radius: 2px; }
.sites-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.sites-list a {
  display: block; padding: 10px 14px;
  background: var(--bg-soft); border-radius: 6px;
  font-size: 13px; color: var(--text-sub);
  transition: all .2s ease;
  border: 1px solid transparent;
}
.sites-list a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }

/* 联系方式 */
.contact-wrap {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
  background: #fff; border-radius: 12px; overflow: hidden;
  box-shadow: var(--shadow);
}
.contact-info { padding: 40px; }
.contact-info h2 { font-size: 26px; color: var(--text-main); margin-bottom: 12px; }
.contact-info .sub { color: var(--text-sub); margin-bottom: 28px; font-size: 14px; }
.contact-list .ci {
  display: flex; gap: 16px; padding: 14px 0;
  border-bottom: 1px dashed #e5ecf3; align-items: flex-start;
}
.contact-list .ci:last-child { border-bottom: none; }
.contact-list .ci .icon {
  width: 42px; height: 42px; border-radius: 10px;
  background: rgba(30,111,184,.1); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; flex-shrink: 0;
}
.contact-list .ci .txt .lbl { font-size: 12px; color: var(--text-sub); margin-bottom: 3px; }
.contact-list .ci .txt .val { font-size: 15px; color: var(--text-main); font-weight: 600; word-break: break-all; }
.contact-list .ci .txt .val a:hover { color: var(--primary); }

.contact-qr {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; padding: 40px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
}
.contact-qr h3 { font-size: 22px; margin-bottom: 8px; }
.contact-qr .tip { font-size: 14px; opacity: .9; margin-bottom: 22px; }
.qr-img {
  width: 200px; height: 200px;
  background: #fff; padding: 12px; border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,.18);
}
.qr-img img { width: 100%; height: 100%; object-fit: contain; }
.qr-note { margin-top: 18px; font-size: 13px; opacity: .9; }
.qr-social { margin-top: 16px; display: flex; gap: 10px; }
.qr-social a {
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,.2); display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 15px; transition: all .2s ease;
}
.qr-social a:hover { background: #fff; color: var(--primary); }

/* 城市导航 */
.city-links {
  background: #fff; border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow);
}
.city-links h3 { font-size: 18px; color: var(--primary-dark); margin-bottom: 18px; }
.city-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; }
.city-grid a {
  display: block; padding: 9px 10px; text-align: center;
  background: var(--bg-soft); border-radius: 5px;
  font-size: 13px; color: var(--text-sub);
  transition: all .2s ease;
}
.city-grid a:hover { background: var(--primary); color: #fff; }
.city-grid a.current { background: var(--primary); color: #fff; font-weight: 600; }

/* footer */
.footer {
  background: #1a2942; color: #c4cfdc; padding: 50px 24px 0;
  font-size: 13px;
}
.footer-inner { max-width: var(--container); margin: 0 auto; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px;
  padding-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-col p { line-height: 1.85; margin-bottom: 10px; opacity: .85; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: #c4cfdc; opacity: .85; }
.footer-col ul li a:hover { color: #fff; opacity: 1; }
.footer-bottom {
  padding: 22px 0; text-align: center;
  color: #8a98ac; font-size: 12.5px; line-height: 1.85;
}
.footer-bottom a { color: #c4cfdc; }
.footer-bottom a:hover { color: #fff; }
.footer-bottom .icp-link { color: #c4cfdc; }

/* 灯箱 */
.lightbox {
  position: fixed; inset: 0; background: rgba(0,0,0,.88);
  display: none; align-items: center; justify-content: center;
  z-index: 9999; padding: 30px;
  cursor: zoom-out;
}
.lightbox.show { display: flex; animation: fadeIn .25s ease; }
.lightbox img {
  max-width: 92%; max-height: 90vh; object-fit: contain;
  border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,.5);
  animation: zoomIn .3s ease;
}
.lightbox .close {
  position: absolute; top: 20px; right: 30px;
  color: #fff; font-size: 36px; cursor: pointer;
  width: 48px; height: 48px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.15); transition: all .2s ease;
}
.lightbox .close:hover { background: rgba(255,255,255,.3); transform: rotate(90deg); }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes zoomIn { from { opacity: 0; transform: scale(.92); } to { opacity: 1; transform: scale(1); } }
@keyframes slideUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.04); } }

/* 滚动渐入 */
.rq-reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.rq-show { opacity: 1; transform: translateY(0); }

/* 响应式 */
@media (max-width: 1100px) {
  .product-grid { grid-template-columns: repeat(3, 1fr); }
  .city-grid { grid-template-columns: repeat(4, 1fr); }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding: 50px 24px 60px; }
  .hero h1 { font-size: 32px; }
  .nav-menu { display: none; }
  .about-grid, .contact-wrap { grid-template-columns: 1fr; }
  .product-grid, .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .sites-list, .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .top-bar-inner { flex-direction: column; gap: 4px; }
}
@media (max-width: 520px) {
  .product-grid, .scene-grid { grid-template-columns: 1fr; }
  .city-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid, .about-features, .sites-list, .footer-grid { grid-template-columns: 1fr; }
  .header-banner { min-height: auto; }
  .nav-inner { height: 64px; }
  .logo .logo-main, .logo .logo-sub, .logo .logo-divider { font-size: 20px; }
  .hero { padding: 30px 20px 40px; }
  .hero h1 { font-size: 26px; }
  .section { padding: 50px 20px; }
  .section-head h2 { font-size: 24px; }
}