/* 研控代理商官网 - 全站样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --blue: #185FA5; --blue-dark: #0C447C; --blue-light: #E6F1FB;
  --teal: #0F6E56; --text: #222; --muted: #667;
  --border: #e2e6ec; --bg-soft: #f6f8fb;
}
body { font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif; color: var(--text); line-height: 1.7; background: #fff; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* 顶栏 */
.topbar { background: var(--blue-dark); color: #cfe2f5; font-size: 13px; }
.topbar .wrap { display: flex; justify-content: space-between; padding: 6px 20px; }
.topbar a { color: #fff; }
header.site { position: sticky; top: 0; background: #fff; border-bottom: 1px solid var(--border); z-index: 50; }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-size: 20px; font-weight: 700; color: var(--blue-dark); }
.logo small { display: block; font-size: 11px; font-weight: 400; color: var(--muted); }
.nav ul { display: flex; gap: 26px; list-style: none; }
.nav ul a { font-size: 15px; padding: 6px 2px; border-bottom: 2px solid transparent; }
.nav ul a:hover, .nav ul a.on { color: var(--blue); border-bottom-color: var(--blue); }
.btn { display: inline-block; padding: 9px 22px; border-radius: 6px; font-size: 15px; cursor: pointer; border: none; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); }
.btn-ghost { border: 1px solid #fff; color: #fff; margin-left: 12px; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.menu-btn { display: none; background: none; border: 1px solid var(--border); font-size: 20px; padding: 4px 12px; border-radius: 6px; }

/* 首屏 */
.hero { background: linear-gradient(160deg, var(--blue-dark), var(--blue)); color: #fff; padding: 90px 0 100px; }
.hero h1 { font-size: 40px; line-height: 1.3; margin-bottom: 14px; }
.hero .sub { font-size: 18px; opacity: .92; margin-bottom: 8px; }
.hero .trust { font-size: 14px; opacity: .8; margin-bottom: 30px; }

/* 区块 */
section { padding: 70px 0; }
section.alt { background: var(--bg-soft); }
.sec-title { text-align: center; font-size: 28px; margin-bottom: 10px; color: var(--blue-dark); }
.sec-desc { text-align: center; color: var(--muted); margin-bottom: 44px; }

/* 数据条 */
.stats { background: var(--blue-dark); color: #fff; }
.stats .wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding: 34px 20px; text-align: center; }
.stats b { font-size: 30px; display: block; }
.stats span { font-size: 13px; opacity: .85; }

/* 产品卡片 */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card { border: 1px solid var(--border); border-radius: 10px; overflow: hidden; background: #fff; transition: box-shadow .2s, transform .2s; }
.card:hover { box-shadow: 0 8px 24px rgba(12,68,124,.12); transform: translateY(-3px); }
.img-ph { height: 170px; background: var(--blue-light); display: flex; align-items: center; justify-content: center; color: #7fa8cf; font-size: 13px; text-align: center; padding: 0 16px; }
.card-img { width: 100%; height: 180px; object-fit: contain; background: #fff; padding: 10px; }
.row-img { width: 230px; height: 150px; object-fit: contain; background: #fff; flex-shrink: 0; }
.card-body { padding: 18px 20px 22px; }
.card-body h3 { font-size: 17px; color: var(--blue-dark); margin-bottom: 8px; }
.card-body p { font-size: 13.5px; color: var(--muted); margin-bottom: 12px; }
.card-body .more { color: var(--blue); font-size: 14px; }

/* 优势列表 */
.feats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.feat { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 24px 26px; }
.feat h3 { font-size: 16px; color: var(--blue-dark); margin-bottom: 8px; }
.feat p { font-size: 14px; color: var(--muted); }

/* 表单 */
.inquiry { background: var(--blue-dark); color: #fff; }
.inquiry .wrap { display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; align-items: start; }
.inquiry h2 { font-size: 26px; margin-bottom: 12px; }
.inquiry p { opacity: .85; font-size: 14.5px; }
.form { display: grid; gap: 14px; }
.form input, .form textarea { padding: 12px 14px; border: none; border-radius: 6px; font-size: 14px; font-family: inherit; }
.form textarea { min-height: 90px; resize: vertical; }
.form .btn-primary { justify-self: start; background: #fff; color: var(--blue-dark); font-weight: 600; }
.form-note { font-size: 12.5px; opacity: .7; }

/* 页脚 */
footer { background: #14293e; color: #9db4c8; font-size: 13.5px; padding: 40px 0 26px; }
footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 30px; margin-bottom: 26px; }
footer h4 { color: #fff; font-size: 15px; margin-bottom: 10px; }
footer a:hover { color: #fff; }
.copy { border-top: 1px solid rgba(255,255,255,.12); padding-top: 18px; text-align: center; font-size: 12.5px; }

/* 内页头部 */
.page-head { background: var(--blue-light); padding: 46px 0; }
.page-head h1 { font-size: 30px; color: var(--blue-dark); }
.page-head p { color: var(--muted); margin-top: 6px; }

/* 详情排版 */
.prose h2 { font-size: 21px; color: var(--blue-dark); margin: 34px 0 12px; }
.prose p { margin-bottom: 12px; color: #333; }
.prose ul { margin: 0 0 14px 22px; color: #333; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 46px; }
.contact-item { margin-bottom: 18px; }
.contact-item b { color: var(--blue-dark); display: block; margin-bottom: 3px; }

/* 响应式 */
@media (max-width: 860px) {
  .nav ul { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff; flex-direction: column; gap: 0; padding: 10px 20px; border-bottom: 1px solid var(--border); }
  .nav ul.open { display: flex; }
  .nav ul a { display: block; padding: 12px 0; border-bottom: none; }
  .menu-btn { display: block; }
  .grid { grid-template-columns: 1fr 1fr; }
  .stats .wrap { grid-template-columns: repeat(2, 1fr); }
  .feats, .inquiry .wrap, .contact-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .btn-ghost { margin-left: 0; margin-top: 10px; }
}
@media (max-width: 520px) { .grid { grid-template-columns: 1fr; } }