/* BVS Portal — 现代企业门户首页样式 */
.bvs-portal {
  --bvs-primary: #0b4a8f;
  --bvs-accent: #0aa06e;
  --bvs-dark: #10233b;
  --bvs-text: #23324a;
  --bvs-muted: #6b7a90;
  --bvs-line: #e4e9f1;
  --bvs-bg: #f5f7fa;
  margin: 0;
  color: var(--bvs-text);
  background: #fff;
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  line-height: 1.7;
}
.bvs-portal *, .bvs-portal *::before, .bvs-portal *::after { box-sizing: border-box; }
.bvs-portal .bvs-wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.bvs-portal a { color: var(--bvs-primary); text-decoration: none; }
.bvs-portal a:hover { color: var(--bvs-accent); }
.bvs-portal img { max-width: 100%; height: auto; }

/* 顶部条 */
.bvs-topbar { background: var(--bvs-dark); color: #c7d3e3; font-size: 13px; }
.bvs-topbar .bvs-wrap { display: flex; gap: 18px; align-items: center; height: 34px; }
.bvs-topbar a { color: #c7d3e3; margin-left: auto; }
.bvs-topbar a:hover { color: #fff; }

/* 头部 */
.bvs-header { border-bottom: 1px solid var(--bvs-line); background: #fff; }
.bvs-headrow { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 20px; flex-wrap: wrap; }
.bvs-logo { display: flex; align-items: center; gap: 12px; color: var(--bvs-text); }
.bvs-logo:hover { color: var(--bvs-text); }
.bvs-logo-mark { display: inline-flex; align-items: center; justify-content: center; width: 52px; height: 52px; border-radius: 12px; background: linear-gradient(135deg, var(--bvs-primary), #1273d1); color: #fff; font-weight: 800; font-size: 18px; letter-spacing: .5px; }
.bvs-logo-txt strong { display: block; font-size: 22px; letter-spacing: 1px; }
.bvs-logo-txt em { display: block; font-style: normal; color: var(--bvs-muted); font-size: 13px; letter-spacing: 2px; }
.bvs-search { min-width: 260px; }
.bvs-search .search-form { display: flex; border: 1px solid var(--bvs-line); border-radius: 20px; overflow: hidden; }
.bvs-search .search-field { border: 0; padding: 8px 16px; flex: 1; outline: none; background: #fbfcfe; }
.bvs-search .search-submit { border: 0; background: var(--bvs-primary); color: #fff; padding: 0 18px; cursor: pointer; }
.bvs-search .search-submit:hover { background: var(--bvs-accent); }

/* 导航 */
.bvs-nav { background: var(--bvs-primary); }
.bvs-navrow { display: flex; flex-wrap: wrap; }
.bvs-navrow a { color: #eaf2fc; padding: 13px 22px; font-size: 16px; transition: background .2s; }
.bvs-navrow a:hover { background: rgba(255, 255, 255, .14); color: #fff; }

/* Hero */
.bvs-hero { background: linear-gradient(120deg, var(--bvs-dark) 0%, var(--bvs-primary) 58%, #1273d1 100%); color: #fff; }
.bvs-hero-row { display: flex; align-items: center; gap: 40px; padding: 58px 20px; flex-wrap: wrap; }
.bvs-hero-txt { flex: 1 1 420px; }
.bvs-hero-txt h1 { font-size: 34px; margin: 0 0 14px; letter-spacing: 1px; }
.bvs-hero-txt p { color: #d8e4f2; margin: 0 0 8px; max-width: 640px; }
.bvs-hero-cta { margin-top: 22px; display: flex; gap: 14px; flex-wrap: wrap; }
.bvs-btn { display: inline-block; background: var(--bvs-accent); color: #fff !important; padding: 11px 26px; border-radius: 24px; font-size: 15px; transition: transform .15s, box-shadow .2s; }
.bvs-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(10, 160, 110, .35); }
.bvs-btn-ghost { background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .45); }
.bvs-btn-ghost:hover { box-shadow: 0 8px 20px rgba(0, 0, 0, .2); }
.bvs-hero-img { flex: 0 1 400px; margin: 0; }
.bvs-hero-img img { border-radius: 12px; box-shadow: 0 18px 50px rgba(0, 0, 0, .35); }

/* 主体 */
.bvs-main { padding: 34px 20px 10px; }
.bvs-sec { margin: 0 0 42px; }
.bvs-sec-t { font-size: 22px; margin: 0 0 18px; padding-left: 12px; border-left: 4px solid var(--bvs-accent); }

/* 产品卡 */
.bvs-prods { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 16px; }
.bvs-card { display: block; border: 1px solid var(--bvs-line); border-radius: 10px; overflow: hidden; background: #fff; transition: transform .15s, box-shadow .2s; }
.bvs-card:hover { transform: translateY(-3px); box-shadow: 0 10px 26px rgba(16, 35, 59, .12); color: var(--bvs-text); }
.bvs-card-img { display: block; aspect-ratio: 4 / 3; overflow: hidden; background: var(--bvs-bg); }
.bvs-card-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.bvs-card-t { display: block; padding: 10px 12px; font-size: 14px; text-align: center; }

/* 新闻两栏（minmax(0,…) 避免 nowrap 标题把 fr 轨道撑出视口） */
.bvs-news-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 34px; }
.bvs-news-col { min-width: 0; }
.bvs-list { list-style: none; margin: 0; padding: 0; }
.bvs-list li { display: flex; gap: 12px; padding: 9px 2px; border-bottom: 1px dashed var(--bvs-line); align-items: baseline; }
.bvs-list li span { color: var(--bvs-muted); font-size: 13px; flex: 0 0 auto; }
.bvs-list li a { color: var(--bvs-text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bvs-list li a:hover { color: var(--bvs-accent); }

/* 解决方案 */
.bvs-sols { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.bvs-sol { border: 1px solid var(--bvs-line); border-radius: 10px; padding: 16px 18px; background: #fff; }
.bvs-sol h3 { margin: 0 0 10px; font-size: 17px; color: var(--bvs-primary); }
.bvs-sol-img { width: 100%; height: 130px; object-fit: cover; border-radius: 8px; margin: 0 0 10px; }
.bvs-sol ul { list-style: none; margin: 0; padding: 0; }
.bvs-sol li { padding: 4px 0; }
.bvs-sol li a { font-size: 14px; color: var(--bvs-text); }
.bvs-sol li a::before { content: '·'; color: var(--bvs-accent); font-weight: 700; margin-right: 6px; }
.bvs-sol li a:hover { color: var(--bvs-accent); }

/* 案例照片 */
.bvs-photos { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.bvs-photos figure { margin: 0; overflow: hidden; border-radius: 8px; border: 1px solid var(--bvs-line); }
.bvs-photos img { width: 100%; height: 110px; object-fit: cover; display: block; transition: transform .25s; }
.bvs-photos figure:hover img { transform: scale(1.06); }
.bvs-more { text-align: right; margin: 12px 0 0; }

/* 页脚 */
.bvs-footer { background: var(--bvs-dark); color: #9fb0c5; padding: 26px 0 30px; font-size: 13px; margin-top: 20px; }
.bvs-footer a { color: #c7d3e3; }
.bvs-footer a:hover { color: #fff; }
.bvs-flinks { margin: 0 0 10px; }
.bvs-flinks a { margin: 0 8px; }
.bvs-kw { margin: 12px 0 0; font-size: 12px; color: #6d7f96; line-height: 1.8; }

/* 响应式 */
@media (max-width: 780px) {
  .bvs-news-grid { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .bvs-hero-row { padding: 38px 20px; }
  .bvs-hero-txt h1 { font-size: 25px; }
  .bvs-navrow a { padding: 11px 13px; font-size: 14px; }
  .bvs-headrow { justify-content: center; }
}