/* biocce.cn 一站式供应 v8 - mega menu 把次要内容收进导航 */
:root {
  --ink: #0E1420;
  --ink-soft: #4a5260;
  --paper: #FFFFFF;
  --paper-warm: #FAFAF7;
  --line: #E8E5DD;
  --yellow: #F4C300;
  --yellow-dark: #D9AC00;
  --gray: #6b7280;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }
.sep { color: #ddd; margin: 0 6px; }

/* ========== 顶部 ========== */
.topbar { background: #1A1F2A; color: #ccc; font-size: 13px; padding: 10px 0; }
.topbar .container { display: flex; justify-content: space-between; }
.topbar a { color: #ccc; }
.topbar a:hover, .topbar .phone { color: var(--yellow); }
.topbar-right > * { margin-left: 16px; }

/* ========== 头部 ========== */
.header { background: #fff; padding: 18px 0; border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; gap: 32px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 50px; height: 50px; background: var(--yellow);
  color: var(--ink); display: flex; align-items: center; justify-content: center;
  font-size: 28px; font-weight: 800; border-radius: 2px;
  font-family: Georgia, serif;
}
.logo-cn { font-size: 18px; font-weight: 800; color: var(--ink); }
.logo-sub { font-size: 11px; color: var(--gray); margin-top: 2px; }

.search-box { flex: 1; max-width: 640px; }
.search-tabs { display: flex; gap: 0; margin-bottom: 4px; }
.search-tabs .tab {
  padding: 4px 14px; font-size: 12px; color: var(--gray);
  border-bottom: 2px solid transparent; cursor: pointer;
}
.search-tabs .tab.active { color: var(--ink); border-bottom-color: var(--yellow); font-weight: 700; }
.search-input { display: flex; border: 2px solid var(--ink); }
.search-input input { flex: 1; padding: 10px 14px; border: 0; outline: 0; font-size: 14px; }
.btn-search {
  padding: 10px 24px; background: var(--ink); color: #fff;
  border: 0; cursor: pointer; font-size: 14px; font-weight: 600;
}

.header-right { display: flex; gap: 12px; align-items: center; }
.hr-item { font-size: 14px; padding: 6px 12px; }
.hr-primary {
  background: var(--yellow); color: var(--ink) !important;
  font-weight: 700; padding: 8px 18px; border-radius: 2px;
}

/* ========== 主导航 + Mega Menu ========== */
.main-nav { background: var(--ink); position: relative; z-index: 100; }
.nav-inner { display: flex; }
.nav-list { display: flex; flex: 1; }
.nav-list > li { position: relative; }
.nav-list > li > a {
  display: block; padding: 18px 22px; color: #fff; font-size: 15px;
  font-weight: 500; transition: all 0.2s; cursor: pointer;
}
.nav-list > li > a:hover, .nav-list > li.active > a { color: var(--yellow); }

/* CTA 按钮 */
.nav-cta {
  background: var(--yellow) !important; color: var(--ink) !important;
  font-weight: 700 !important;
  margin-left: auto;
}

/* Mega menu */
.mega {
  position: absolute; top: 100%; left: 0; min-width: 600px;
  background: #fff; padding: 32px; box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  display: none; z-index: 50;
  border-top: 3px solid var(--yellow);
}
.has-mega:hover .mega { display: grid; }
.mega-col h4 {
  font-size: 11px; color: var(--gray); letter-spacing: 2px;
  margin-bottom: 16px; padding-bottom: 8px; border-bottom: 1px solid var(--line);
}
.mega-col a {
  display: block; font-size: 13px; color: var(--ink);
  padding: 6px 0; transition: color 0.2s;
}
.mega-col a:hover { color: var(--yellow-dark); }

/* 产品中心 mega：3 列布局 */
.mega:not(.mega-narrow) { grid-template-columns: 1fr 1fr 1fr 1.1fr; gap: 32px; }

/* 行业方案 mega：2 列 */
.mega-col-2 { grid-column: span 2; }
.ind-grid-menu {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 4px 16px;
}
.ind-grid-menu a { padding: 4px 0; font-size: 13px; }

/* CTA 推广位 */
.mega-cta { background: #fafaf7; padding: 20px; border-radius: 4px; }
.mega-promo strong { display: block; font-size: 16px; color: var(--ink); margin-bottom: 8px; }
.mega-promo span { display: block; font-size: 12px; color: var(--gray); line-height: 1.5; margin-bottom: 12px; }
.mega-btn {
  display: inline-block; padding: 8px 16px; background: var(--ink);
  color: #fff; font-size: 12px; font-weight: 600; border-radius: 2px;
}
.mega-btn:hover { background: var(--yellow); color: var(--ink); }

/* ========== 通用 ========== */
section { padding: 60px 0; }
.sec-head { text-align: center; margin-bottom: 40px; }
.sec-eyebrow {
  font-size: 12px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--gray); margin-bottom: 12px; font-weight: 600;
}
.sec-head h2 {
  font-size: 36px; font-weight: 800; line-height: 1.2; margin-bottom: 8px;
  letter-spacing: -0.5px;
}
.sec-head p { font-size: 15px; color: var(--gray); }

/* ========== Hero（紧凑） ========== */
.hero { position: relative; padding: 0; overflow: hidden; background: var(--paper-warm); }
.hero-yellow {
  position: absolute; top: 0; right: 0; width: 55%; height: 100%;
  background: var(--yellow); z-index: 0;
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
  align-items: center; min-height: 460px; padding: 50px 32px;
}
.hero-tag {
  display: inline-block; padding: 6px 14px; background: rgba(14,20,32,0.08);
  color: var(--ink); font-size: 12px; font-weight: 700;
  border-radius: 20px; margin-bottom: 20px; letter-spacing: 0.5px;
}
.hero-content h1 {
  font-size: 56px; font-weight: 800; line-height: 1.1; margin-bottom: 20px;
  letter-spacing: -1.5px; color: var(--ink);
}
.hero-sub { font-size: 16px; color: var(--ink-soft); margin-bottom: 28px; max-width: 540px; line-height: 1.7; }
.hero-actions { display: flex; gap: 12px; margin-bottom: 32px; }
.btn-yellow, .btn-ghost-dark {
  padding: 14px 28px; font-size: 14px; font-weight: 700;
  border-radius: 2px; transition: all 0.2s;
}
.btn-yellow { background: var(--ink); color: #fff; }
.btn-yellow:hover { background: var(--yellow); color: var(--ink); }
.btn-ghost-dark { background: transparent; color: var(--ink); border: 2px solid var(--ink); }
.btn-ghost-dark:hover { background: var(--ink); color: #fff; }
.hero-trust {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  max-width: 540px; padding-top: 24px; border-top: 2px solid rgba(14,20,32,0.1);
}
.ht-item strong { display: block; font-size: 28px; color: var(--ink); font-weight: 800; line-height: 1; }
.ht-item span { font-size: 11px; color: var(--gray); margin-top: 4px; display: block; }
.hero-image {
  aspect-ratio: 4/3; background: rgba(14,20,32,0.1);
  border-radius: 4px; overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}
.hero-image img { width: 100%; height: 100%; object-fit: cover; }

/* ========== 三大类（一行简版） ========== */
.categories { background: var(--paper); }
.cat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cat-block {
  background: var(--paper-warm); padding: 32px 28px;
  display: flex; align-items: flex-start; gap: 20px;
  transition: all 0.2s; border-top: 3px solid transparent;
}
.cat-block:hover { border-top-color: var(--yellow); background: #fff; box-shadow: 0 8px 20px rgba(0,0,0,0.06); }
.cat-num {
  font-size: 40px; font-weight: 800; color: var(--yellow);
  font-family: Georgia, serif; line-height: 1; flex-shrink: 0;
}
.cat-body h3 { font-size: 22px; font-weight: 800; margin-bottom: 6px; letter-spacing: -0.3px; }
.cat-body p { font-size: 13px; color: var(--gray); margin-bottom: 12px; }
.cat-link { font-size: 13px; color: var(--ink); font-weight: 700; }

/* ========== 精选设备（紧凑） ========== */
.featured { background: var(--paper-warm); }
.sec-head-row {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 32px;
}
.sec-head-row h2 { font-size: 30px; font-weight: 800; letter-spacing: -0.3px; }
.feat-tabs { display: flex; gap: 4px; align-items: center; }
.ftab {
  padding: 6px 16px; background: #fff; color: var(--ink);
  font-size: 13px; font-weight: 600; border-radius: 20px;
  border: 1px solid var(--line);
}
.ftab.active { background: var(--ink); color: #fff; border-color: var(--ink); }
.feat-more { font-size: 14px; color: var(--ink); font-weight: 700; margin-left: 8px; }

.featured-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.feat-card {
  background: #fff; border-radius: 4px; overflow: hidden;
  transition: all 0.2s; display: block;
}
.feat-card:hover { transform: translateY(-3px); box-shadow: 0 12px 24px rgba(0,0,0,0.1); }
.feat-img {
  aspect-ratio: 4/3; background: #f5f5f5; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.feat-img img { width: 100%; height: 100%; object-fit: cover; }
.placeholder-feat {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #f0f0f0, #fafafa);
  color: var(--ink); font-size: 14px; font-weight: 800; text-align: center;
  font-family: Georgia, serif; line-height: 1.3; padding: 8px;
}
.feat-info { padding: 14px; }
.feat-brand { font-size: 10px; color: var(--yellow-dark); font-weight: 700; letter-spacing: 1px; margin-bottom: 3px; }
.feat-name { font-size: 14px; font-weight: 700; color: var(--ink); margin-bottom: 4px; line-height: 1.3; }
.feat-spec { font-size: 11px; color: var(--gray); line-height: 1.4; margin-bottom: 10px; min-height: 30px; }
.feat-foot { display: flex; justify-content: space-between; align-items: center; padding-top: 8px; border-top: 1px solid var(--line); }
.feat-price { color: var(--ink); font-size: 13px; font-weight: 700; }
.feat-stock { background: var(--yellow); color: var(--ink); font-size: 10px; padding: 2px 6px; font-weight: 700; }

/* ========== 清洁耗材（紧凑） ========== */
.consumables { background: #fff; padding: 0; }
.consumables-yellow { background: var(--yellow); padding: 36px 0; }
.cy-head h2 { font-size: 30px; font-weight: 800; color: var(--ink); margin-bottom: 4px; }
.cy-head p { font-size: 14px; color: var(--ink); }
.cons-grid {
  display: grid; grid-template-columns: repeat(8, 1fr); gap: 12px;
  margin: 32px 0;
}
.cons-card {
  background: #fff; padding: 20px 12px; text-align: center;
  border-radius: 4px; transition: all 0.2s; border: 1px solid var(--line);
}
.cons-card:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(0,0,0,0.08); border-color: var(--yellow); }
.cons-icon { font-size: 32px; margin-bottom: 8px; }
.cons-card h4 { font-size: 13px; color: var(--ink); font-weight: 700; margin-bottom: 6px; }
.cons-price { font-size: 14px; color: var(--ink); font-weight: 800; }
.cons-price span { font-size: 10px; color: var(--gray); font-weight: 400; }
.cons-more { display: block; text-align: center; font-size: 14px; color: var(--ink); font-weight: 700; padding-top: 8px; }

/* ========== 联系 ========== */
.contact { background: var(--ink); color: #fff; padding: 60px 0; }
.contact-inner { display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; align-items: center; }
.contact-text h2 { font-size: 32px; font-weight: 800; margin-bottom: 16px; }
.contact-promise li { padding: 5px 0; font-size: 14px; }
.contact-promise strong { color: var(--yellow); }
.contact-form {
  background: #fff; padding: 28px; border-radius: 4px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px; color: var(--ink);
}
.contact-form label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--gray); }
.contact-form label.full { grid-column: 1 / -1; }
.contact-form label span { color: var(--yellow-dark); }
.contact-form input, .contact-form select, .contact-form textarea {
  padding: 10px 12px; border: 1px solid var(--line); font-size: 13px;
  font-family: inherit; background: #fff;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
  outline: 0; border-color: var(--yellow);
}
.form-submit {
  grid-column: 1 / -1; padding: 14px; background: var(--yellow);
  color: var(--ink); border: 0; font-size: 14px; font-weight: 700;
  cursor: pointer; transition: all 0.2s;
}
.form-submit:hover { background: #fff; }

/* ========== Footer ========== */
.footer { background: #0a0f18; color: #ccc; padding: 40px 0 20px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 30px; padding-bottom: 30px; border-bottom: 1px solid #1a1f2a; }
.footer-brand { display: flex; align-items: center; gap: 10px; }
.footer-brand strong { display: block; color: #fff; font-size: 15px; font-weight: 800; }
.footer-brand span { display: block; font-size: 11px; color: #888; margin-top: 3px; }
.footer-col h5 { color: var(--yellow); font-size: 12px; margin-bottom: 12px; letter-spacing: 1px; }
.footer-col a, .footer-col p { display: block; color: #ccc; font-size: 12px; padding: 4px 0; }
.footer-col a:hover { color: var(--yellow); }
.footer-bottom { text-align: center; padding-top: 20px; font-size: 11px; color: #666; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; min-height: auto; padding: 40px 32px; }
  .hero-yellow { width: 100%; height: 40%; top: 0; }
  .hero-content h1 { font-size: 40px; }
  .sec-head h2 { font-size: 28px; }
  .sec-head-row { flex-direction: column; align-items: flex-start; gap: 16px; }
  .cat-row { grid-template-columns: 1fr; }
  .featured-grid { grid-template-columns: repeat(2, 1fr); }
  .cons-grid { grid-template-columns: repeat(4, 1fr); }
  .contact-inner { grid-template-columns: 1fr; gap: 30px; }
  .contact-form { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .search-box { display: none; }
  .nav-list { overflow-x: auto; white-space: nowrap; }
  .nav-list > li > a { padding: 18px 14px; font-size: 14px; }
  .mega { display: none !important; } /* 移动端禁用 mega */
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  section { padding: 50px 0; }
  .hero-content h1 { font-size: 32px; }
  .sec-head h2 { font-size: 24px; }
  .cat-row, .featured-grid, .cons-grid { grid-template-columns: 1fr; gap: 12px; }
  .cons-grid { grid-template-columns: repeat(2, 1fr); }
  .featured-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-trust { grid-template-columns: repeat(2, 1fr); }
  .topbar-right { display: none; }
}