/* 泓源（天津）生态科技集团官网 - 全站样式
   品牌主色取自官方 Logo：蓝 #2E6BD6 → 深蓝紫 #2B3FA8 */
:root {
  --blue: #2e6bd6;
  --blue-deep: #2b3fa8;
  --blue-dark: #16255e;
  --blue-light: #e8f0fc;
  --ink: #1c2333;
  --gray: #5a6478;
  --line: #e3e8f2;
  --bg: #ffffff;
  --bg-soft: #f5f8fd;
  --gold: #f2b418;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--ink); background: var(--bg); line-height: 1.75; font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ===== 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(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 52px; width: auto; }
.brand .name { font-size: 19px; font-weight: 700; color: var(--blue-dark); letter-spacing: 1px; }
.brand .name small { display: block; font-size: 10px; color: var(--gray); font-weight: 400; letter-spacing: .5px; }
.main-nav { display: flex; gap: 4px; }
.main-nav a {
  padding: 8px 14px; font-size: 15.5px; color: var(--ink); border-radius: 6px; transition: .2s;
}
.main-nav a:hover { color: var(--blue); background: var(--blue-light); }
.main-nav a.active { color: var(--blue); font-weight: 600; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; font-size: 20px; color: var(--blue-dark); cursor: pointer; }

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 78vh; display: flex; align-items: center;
  background: linear-gradient(118deg, #16255e 0%, #2b3fa8 52%, #2e6bd6 100%);
  color: #fff; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: url("../img/showroom-panorama.jpg") center/cover no-repeat;
  opacity: .16; mix-blend-mode: luminosity;
}
.hero-inner { position: relative; z-index: 2; padding: 90px 24px; max-width: 1180px; margin: 0 auto; width: 100%; }
.hero .eyebrow { display: inline-block; border: 1px solid rgba(255,255,255,.45); padding: 5px 16px; border-radius: 30px; font-size: 13.5px; letter-spacing: 3px; margin-bottom: 26px; }
.hero h1 { font-size: 44px; line-height: 1.35; font-weight: 700; letter-spacing: 2px; max-width: 760px; }
.hero p.sub { margin-top: 20px; font-size: 18px; opacity: .92; max-width: 640px; }
.hero .cta { margin-top: 38px; display: flex; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 13px 34px; border-radius: 8px; font-size: 16px; transition: .2s; }
.btn-solid { background: #fff; color: var(--blue-deep); font-weight: 600; }
.btn-solid:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(0,0,0,.22); }
.btn-line { border: 1px solid rgba(255,255,255,.6); color: #fff; }
.btn-line:hover { background: rgba(255,255,255,.12); }
.hero-mark { position: absolute; right: 4%; bottom: 8%; width: 300px; opacity: .2; pointer-events: none; }

/* ===== 数据条 ===== */
.stats { background: var(--blue-dark); color: #fff; }
.stats-inner { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 42px 24px; text-align: center; }
.stat b { font-size: 40px; font-weight: 700; display: block; color: #fff; }
.stat b i { font-style: normal; color: var(--gold); font-size: 22px; margin-left: 2px; }
.stat span { font-size: 14px; opacity: .85; }

/* ===== 通用版块 ===== */
.section { padding: 84px 0; }
.section.soft { background: var(--bg-soft); }
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-head .en { font-size: 12.5px; letter-spacing: 4px; color: var(--blue); text-transform: uppercase; }
.sec-head h2 { font-size: 32px; margin-top: 10px; color: var(--ink); letter-spacing: 1px; }
.sec-head p { margin-top: 12px; color: var(--gray); max-width: 720px; margin-left: auto; margin-right: auto; }
.sec-head .bar { width: 56px; height: 4px; background: linear-gradient(90deg, var(--blue), var(--blue-deep)); margin: 18px auto 0; border-radius: 2px; }

/* ===== 产业矩阵 ===== */
.matrix { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.matrix-card {
  background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 34px 26px;
  transition: .25s; position: relative; overflow: hidden;
}
.matrix-card:hover { transform: translateY(-6px); box-shadow: 0 14px 34px rgba(43,63,168,.14); border-color: var(--blue); }
.matrix-card .ico { width: 56px; height: 56px; border-radius: 12px; background: var(--blue-light); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.matrix-card .ico svg { width: 30px; height: 30px; }
.matrix-card h3 { font-size: 19px; color: var(--blue-dark); margin-bottom: 10px; }
.matrix-card p { font-size: 14.5px; color: var(--gray); }
.matrix-card .more { display: inline-block; margin-top: 16px; font-size: 14px; color: var(--blue); }

/* ===== 业务列表 ===== */
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.biz-item { background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--blue); border-radius: 10px; padding: 24px 24px; transition: .2s; }
.biz-item:hover { background: var(--blue-light); }
.biz-item h4 { font-size: 17.5px; color: var(--ink); }
.biz-item p { font-size: 14px; color: var(--gray); margin-top: 8px; }

/* ===== 案例卡片 ===== */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card { background: #fff; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; transition: .25s; }
.case-card:hover { transform: translateY(-5px); box-shadow: 0 14px 30px rgba(43,63,168,.13); }
.case-card .thumb { height: 190px; background: linear-gradient(135deg, var(--blue-deep), var(--blue)); position: relative; display: flex; align-items: flex-end; padding: 18px; }
.case-card .thumb .cap { color: #fff; font-size: 14px; background: rgba(22,37,94,.55); padding: 4px 12px; border-radius: 20px; }
.case-card .body { padding: 22px 22px 26px; }
.case-card h3 { font-size: 17.5px; color: var(--ink); }
.case-card .meta { margin-top: 10px; font-size: 13.5px; color: var(--gray); }
.case-card .meta b { color: var(--blue); font-weight: 600; }

/* ===== 双栏图文 ===== */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split img { border-radius: 16px; box-shadow: 0 16px 40px rgba(22,37,94,.16); }
.split h2 { font-size: 28px; color: var(--ink); margin-bottom: 18px; }
.split p { color: var(--gray); margin-bottom: 14px; }
.check-list li { padding: 7px 0 7px 30px; position: relative; color: var(--ink); font-size: 15.5px; }
.check-list li::before { content: ""; position: absolute; left: 0; top: 13px; width: 18px; height: 18px; border-radius: 50%; background: var(--blue-light); }
.check-list li::after { content: ""; position: absolute; left: 5px; top: 18px; width: 8px; height: 5px; border-left: 2px solid var(--blue); border-bottom: 2px solid var(--blue); transform: rotate(-45deg); }

/* ===== FAQ ===== */
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 12px; margin-bottom: 14px; overflow: hidden; }
.faq-item summary { cursor: pointer; padding: 20px 24px; font-size: 16.5px; font-weight: 600; color: var(--ink); list-style: none; position: relative; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%); font-size: 24px; color: var(--blue); font-weight: 400; }
.faq-item[open] summary::after { content: "−"; }
.faq-item .ans { padding: 0 24px 22px; color: var(--gray); font-size: 15px; }

/* ===== 新闻 ===== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 26px; transition: .25s; }
.news-card:hover { border-color: var(--blue); box-shadow: 0 12px 28px rgba(43,63,168,.12); }
.news-card time { font-size: 13px; color: var(--blue); letter-spacing: 1px; }
.news-card h3 { font-size: 17px; margin-top: 10px; line-height: 1.55; }
.news-card p { font-size: 14px; color: var(--gray); margin-top: 10px; }

/* ===== CTA ===== */
.cta-band { background: linear-gradient(118deg, var(--blue-deep), var(--blue)); color: #fff; text-align: center; padding: 70px 24px; }
.cta-band h2 { font-size: 28px; letter-spacing: 1px; }
.cta-band p { margin-top: 12px; opacity: .9; }
.cta-band .btn { margin-top: 26px; }

/* ===== 页脚 ===== */
.site-footer { background: var(--blue-dark); color: #cdd7f0; padding: 60px 0 0; font-size: 14.5px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.site-footer h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.site-footer li { padding: 4px 0; }
.site-footer a:hover { color: #fff; }
.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-brand img { height: 48px; background: #fff; border-radius: 8px; padding: 4px; }
.footer-brand .t { color: #fff; font-size: 16px; font-weight: 600; }
.copyright { border-top: 1px solid rgba(255,255,255,.14); padding: 18px 0; text-align: center; font-size: 13px; opacity: .75; }

/* ===== 子页 banner ===== */
.page-banner { background: linear-gradient(118deg, #16255e 0%, #2b3fa8 60%, #2e6bd6 100%); color: #fff; padding: 88px 0 66px; text-align: center; }
.page-banner h1 { font-size: 34px; letter-spacing: 2px; }
.page-banner .en { font-size: 12.5px; letter-spacing: 4px; opacity: .8; margin-top: 8px; text-transform: uppercase; }
.breadcrumb { font-size: 13.5px; padding: 14px 0; color: var(--gray); background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.breadcrumb a { color: var(--blue); }

/* ===== 表格 ===== */
.tbl { width: 100%; border-collapse: collapse; font-size: 14.5px; background: #fff; }
.tbl th { background: var(--blue-deep); color: #fff; padding: 12px 14px; text-align: left; font-weight: 600; }
.tbl td { padding: 11px 14px; border-bottom: 1px solid var(--line); }
.tbl tr:hover td { background: var(--blue-light); }

/* ===== 图库 ===== */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.gallery img { border-radius: 12px; height: 230px; width: 100%; object-fit: cover; transition: .25s; }
.gallery img:hover { transform: scale(1.02); }

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .matrix, .case-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .biz-grid { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 30px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 32px; }
  .main-nav { display: none; position: absolute; top: 76px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 12px 20px; border-bottom: 1px solid var(--line); }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
}
@media (max-width: 620px) {
  .matrix, .biz-grid, .case-grid, .news-grid, .gallery { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
}