/* ===== 勤斌科技（上海）有限公司 站点样式 ===== */
:root {
  --primary: #1B4D3E;
  --primary-dark: #123529;
  --accent: #2E8B57;
  --accent-light: #E8F5EE;
  --text: #1F2937;
  --text-light: #6B7280;
  --bg: #FFFFFF;
  --bg-soft: #F4F9F6;
  --border: #E5E7EB;
  --radius: 12px;
  --shadow: 0 4px 16px rgba(27, 77, 62, .08);
  --shadow-lg: 0 10px 32px rgba(27, 77, 62, .14);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans", "Noto Sans", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container { width: min(1200px, 92%); margin: 0 auto; }

/* ===== 顶部工具条 ===== */
.topbar {
  background: var(--primary-dark);
  color: #CDE8D8;
  font-size: 13px;
}
.topbar .container {
  display: flex; justify-content: space-between; align-items: center;
  height: 36px;
}
.topbar-tel { display: flex; gap: 18px; }

/* 语言切换 */
.lang-switch { display: flex; gap: 6px; align-items: center; }
.lang-btn {
  background: transparent; border: 1px solid rgba(207, 226, 243, .45);
  color: #CDE8D8; padding: 2px 10px; border-radius: 20px;
  font-size: 12px; cursor: pointer; transition: .2s;
}
.lang-btn:hover { border-color: #fff; color: #fff; }
.lang-btn.active { background: #fff; color: var(--primary-dark); border-color: #fff; }

/* ===== 导航 ===== */
.site-header {
  background: #fff; position: sticky; top: 0; z-index: 100;
  box-shadow: 0 1px 0 var(--border);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }

.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  width: 52px; height: 52px; border-radius: 10px;
  object-fit: contain; display: block; flex: none;
}
.logo-text { display: flex; flex-direction: column; justify-content: center; line-height: 1.25; }
.logo-cn { font-weight: 700; font-size: 16px; color: var(--primary-dark); white-space: nowrap; }

.nav-menu { display: flex; gap: 4px; }
.nav-menu > li > a {
  display: block; padding: 8px 16px; border-radius: 8px;
  font-size: 15px; font-weight: 500; color: var(--text); transition: .2s;
}
.nav-menu > li > a:hover, .nav-menu > li > a.active {
  color: var(--primary); background: var(--bg-soft);
}

/* 移动端菜单按钮 */
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: var(--primary-dark); margin: 5px 0; transition: .3s; }

/* ===== 页面横幅 ===== */
.page-hero {
  background: linear-gradient(120deg, var(--primary-dark), var(--primary) 55%, #3A9B6E);
  color: #fff; padding: 56px 0 60px; position: relative; overflow: hidden;
}
.page-hero::after {
  content: ""; position: absolute; right: -80px; top: -80px;
  width: 300px; height: 300px; border-radius: 50%;
  background: rgba(255, 255, 255, .06);
}
.page-hero h1 { font-size: 32px; margin-bottom: 10px; }
.page-hero p { color: #CDE8D8; font-size: 15px; max-width: 640px; }
.breadcrumb { font-size: 13px; color: #A7D4BC; margin-bottom: 14px; }
.breadcrumb a:hover { text-decoration: underline; }

/* 首页 Hero */
.hero {
  background:
    radial-gradient(900px 420px at 85% 10%, rgba(46, 139, 87, .35), transparent 60%),
    linear-gradient(120deg, var(--primary-dark), var(--primary));
  color: #fff; padding: 88px 0 96px; position: relative; overflow: hidden;
}
.hero-inner { max-width: 640px; }
.hero-tag {
  display: inline-block; background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .25); border-radius: 30px;
  padding: 4px 16px; font-size: 13px; margin-bottom: 20px; letter-spacing: .5px;
}
.hero h1 { font-size: 42px; line-height: 1.3; margin-bottom: 18px; }
.hero p { font-size: 17px; color: #D8EBDF; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 30px; border-radius: 10px;
  font-size: 15px; font-weight: 600; cursor: pointer; border: none; transition: .25s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #0B7C56; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255, 255, 255, .5); }
.btn-ghost:hover { background: rgba(255, 255, 255, .12); border-color: #fff; }

/* 统计条 */
.stats-bar { background: var(--primary-dark); color: #fff; padding: 26px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; text-align: center; }
.stat-num { font-size: 30px; font-weight: 800; color: #7FE3BE; }
.stat-label { font-size: 13px; color: #B9D9C6; }

/* ===== 通用区块 ===== */
.section { padding: 72px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 660px; margin: 0 auto 44px; }
.section-head .kicker {
  display: inline-block; color: var(--accent); font-weight: 700;
  font-size: 13px; letter-spacing: 2px; margin-bottom: 10px; text-transform: uppercase;
}
.section-head h2 { font-size: 30px; color: var(--primary-dark); margin-bottom: 12px; }
.section-head p { color: var(--text-light); font-size: 15px; }

/* 卡片 */
.cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cards-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.cards-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 24px; transition: .25s; box-shadow: var(--shadow);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: #BFE3D2; }
.card-icon {
  width: 52px; height: 52px; border-radius: 12px; font-size: 26px;
  background: var(--accent-light); display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.card h3 { font-size: 18px; color: var(--primary-dark); margin-bottom: 10px; }
.card p { font-size: 14px; color: var(--text-light); margin-bottom: 14px; }
.card .more { font-size: 13px; font-weight: 600; color: var(--primary); }
.card .more:hover { color: var(--accent); }

/* 产品卡片 */
.product-card { text-align: left; }
.product-card .badge {
  display: inline-block; font-size: 11px; background: var(--accent-light); color: #046C4E;
  border-radius: 20px; padding: 2px 10px; margin-bottom: 12px; font-weight: 600;
}
.product-card ul { margin: 10px 0 14px; }
.product-card ul li {
  font-size: 13px; color: var(--text-light); padding-left: 18px; position: relative; margin-bottom: 4px;
}
.product-card ul li::before {
  content: "•"; color: var(--accent); position: absolute; left: 4px; font-weight: 700;
}

/* 应用领域 */
.app-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.app-item {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 12px; text-align: center; transition: .25s;
}
.app-item:hover { border-color: var(--accent); transform: translateY(-4px); }
.app-item .ico { font-size: 30px; margin-bottom: 10px; }
.app-item h4 { font-size: 14px; color: var(--primary-dark); }

/* 关于首页横条 */
.split-section { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.split-section h2 { font-size: 28px; color: var(--primary-dark); margin-bottom: 16px; }
.split-section p { color: var(--text-light); margin-bottom: 14px; font-size: 15px; }
.check-list li { padding-left: 26px; position: relative; margin-bottom: 10px; font-size: 15px; }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 800;
}
.visual-panel {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 16px; color: #fff; padding: 36px 30px; box-shadow: var(--shadow-lg);
}
.visual-panel h3 { font-size: 20px; margin-bottom: 12px; }
.visual-panel p { color: #EAF7F1; font-size: 14px; }
.visual-panel .big { font-size: 34px; font-weight: 800; margin: 8px 0 2px; }

/* 新闻列表 */
.news-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: .25s; box-shadow: var(--shadow); }
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.news-cover { height: 140px; display: flex; align-items: center; justify-content: center; font-size: 44px; }
.news-body { padding: 20px; }
.news-date { font-size: 12px; color: var(--text-light); margin-bottom: 8px; }
.news-body h3 { font-size: 16px; margin-bottom: 8px; color: var(--primary-dark); }
.news-body p { font-size: 13px; color: var(--text-light); }
.cover-1 { background: linear-gradient(135deg, #DCF0E6, #EFF8F3); }
.cover-2 { background: linear-gradient(135deg, #D1FAE5, #ECFDF5); }
.cover-3 { background: linear-gradient(135deg, #FDE8E8, #FEF2F2); }
.cover-4 { background: linear-gradient(135deg, #FEF3C7, #FFFBEB); }

/* CTA */
.cta-band {
  background: linear-gradient(120deg, var(--primary), var(--accent));
  color: #fff; border-radius: 18px; padding: 46px 40px;
  display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap;
}
.cta-band h2 { font-size: 26px; margin-bottom: 8px; }
.cta-band p { color: rgba(255, 255, 255, .85); font-size: 14px; }

/* ===== 产品页 ===== */
.cat-nav { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 40px; }
.cat-btn {
  border: 1px solid var(--border); background: #fff; border-radius: 30px;
  padding: 8px 20px; font-size: 14px; cursor: pointer; transition: .2s; font-weight: 500;
}
.cat-btn:hover { border-color: var(--primary); color: var(--primary); }
.cat-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.product-section { margin-bottom: 56px; }
.product-section > h2 {
  font-size: 22px; color: var(--primary-dark); margin-bottom: 6px;
  padding-left: 14px; border-left: 4px solid var(--accent);
}
.product-section > .sub { color: var(--text-light); font-size: 14px; margin-bottom: 22px; padding-left: 18px; }

/* 表格 */
.table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--bg-soft); color: var(--primary-dark); font-weight: 700; white-space: nowrap; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #F7FCF9; }

/* ===== 方案页 ===== */
.flow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.flow-step {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 20px; text-align: center; position: relative; box-shadow: var(--shadow);
}
.flow-step .num {
  width: 40px; height: 40px; border-radius: 50%; background: var(--primary); color: #fff;
  font-weight: 800; display: flex; align-items: center; justify-content: center; margin: 0 auto 12px;
}
.flow-step h4 { font-size: 15px; color: var(--primary-dark); margin-bottom: 8px; }
.flow-step p { font-size: 13px; color: var(--text-light); }

/* FAQ */
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; }
.faq-q {
  width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  padding: 18px 22px; font-size: 15px; font-weight: 600; color: var(--primary-dark);
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq-q .arrow { transition: .3s; color: var(--accent); font-size: 13px; }
.faq-item.open .faq-q .arrow { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a-inner { padding: 0 22px 18px; color: var(--text-light); font-size: 14px; }
.faq-item.open .faq-a { max-height: 400px; }

/* ===== 联系页 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; }
.info-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; margin-bottom: 18px; box-shadow: var(--shadow);
  display: flex; gap: 16px; align-items: flex-start;
}
.info-card .ico {
  width: 44px; height: 44px; border-radius: 10px; background: var(--accent-light);
  display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0;
}
.info-card h4 { font-size: 15px; color: var(--primary-dark); margin-bottom: 4px; }
.info-card p { font-size: 14px; color: var(--text-light); word-break: break-all; }

.form-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; box-shadow: var(--shadow);
}
.form-card h3 { font-size: 20px; color: var(--primary-dark); margin-bottom: 6px; }
.form-card .form-tip { font-size: 13px; color: var(--text-light); margin-bottom: 22px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; font-family: inherit; transition: .2s; background: #fff;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(27, 77, 62, .12);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.form-msg { margin-top: 12px; font-size: 14px; }
.form-msg.ok { color: #046C4E; }
.form-msg.err { color: #C81E1E; }

/* ===== 页脚 ===== */
.site-footer { background: var(--primary-dark); color: #B9D9C6; padding: 40px 0 0; margin-top: 72px; }
.footer-grid { display: flex; justify-content: space-between; gap: 24px; padding-bottom: 24px; align-items: flex-start; }
.footer-grid > div { flex: 0 1 auto; }
.footer-grid h4 { color: #fff; font-size: 15px; margin-bottom: 10px; }
.footer-grid p, .footer-grid li { font-size: 12.5px; margin-bottom: 5px; color: #B9D9C6; line-height: 1.55; text-align: left; }
.footer-grid a:hover { color: #fff; text-decoration: underline; }
.footer-brand { display: flex; align-items: center; gap: 10px; }
.footer-desc { margin-top: 10px; max-width: 330px; }
.footer-brand .logo-mark { background: rgba(255, 255, 255, .08); border-radius: 9px; }
.footer-brand .cn { color: #fff; font-weight: 700; font-size: 16px; display: flex; align-items: center; height: 52px; line-height: 1.2; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12); padding: 12px 0;
  display: flex; justify-content: space-between; font-size: 12px; flex-wrap: wrap; gap: 8px;
}

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .cards-grid, .cards-grid.cols-4, .cards-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(3, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .split-section { grid-template-columns: 1fr; }
  .news-list { grid-template-columns: 1fr; }
  .flow-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { flex-wrap: wrap; }
  .footer-grid > div { flex: 1 1 40%; }
  .hero h1 { font-size: 32px; }
  .topbar .container { justify-content: center; }
  .topbar-tel { display: none; }

  .menu-toggle { display: block; }
  .nav-menu {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 12px 4%;
    box-shadow: 0 12px 24px rgba(0, 0, 0, .1); border-top: 1px solid var(--border);
  }
  .nav-menu.open { display: flex; }
  .nav-menu > li > a { padding: 12px 14px; }
}
@media (max-width: 560px) {
  .cards-grid, .cards-grid.cols-4, .cards-grid.cols-2 { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid > div { flex: 1 1 100%; }
  .footer-desc { max-width: none; }
  .flow-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
  .page-hero h1 { font-size: 24px; }
}


/* ===== 下载中心 ===== */
.dl-toolbar { margin-bottom: 40px; }
.dl-search {
  width: 100%; max-width: 560px; padding: 12px 18px;
  border: 1px solid var(--border); border-radius: 10px;
  font-size: 14px; color: var(--text); outline: none; transition: .2s;
}
.dl-search:focus { border-color: var(--primary); box-shadow: var(--shadow); }
/* 下载中心：联系获取提示条 */
.dl-note {
  width: 100%;
  margin: 10px 0 0;
  padding: 10px 14px;
  background: #E8F5EE;
  border-left: 4px solid #2E8B57;
  border-radius: 6px;
  font-size: 14px;
  line-height: 1.6;
  color: #1B4D3E;
}

.dl-total { margin-top: 10px; font-size: 13px; color: var(--text-light); }
.dl-cats { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.dl-chip {
  padding: 6px 14px; border: 1px solid var(--border); border-radius: 999px;
  font-size: 13px; color: var(--text); background: #fff; text-decoration: none; transition: .2s;
}
.dl-chip:hover { color: var(--primary); border-color: var(--primary); background: var(--bg-soft); }
.dl-section { margin-bottom: 44px; scroll-margin-top: 90px; }
.dl-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 20px; color: var(--primary-dark);
  padding-bottom: 10px; border-bottom: 2px solid var(--bg-soft); margin-bottom: 14px;
}
.dl-count {
  font-size: 12px; font-weight: 700; color: var(--primary);
  background: #E8F4EE; padding: 2px 10px; border-radius: 999px;
}
.dl-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 10px; }
.dl-item a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px;
  text-decoration: none; color: var(--text); font-size: 13.5px; transition: .2s;
}
.dl-item a:hover { border-color: var(--primary); color: var(--primary); box-shadow: var(--shadow); }
.dl-ico { flex-shrink: 0; }
.dl-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dl-ext {
  flex-shrink: 0; font-size: 10px; font-weight: 700;
  color: #B91C1C; background: #FEE2E2; padding: 2px 6px; border-radius: 4px;
}
.dl-empty { display: none; text-align: center; color: var(--text-light); padding: 48px 0; font-size: 15px; }
.btn[disabled] { opacity: .6; cursor: not-allowed; }
@media (max-width: 640px) {
  .dl-list { grid-template-columns: 1fr; }
  .dl-search { max-width: 100%; }
}

/* ===== 图片美化（2026-08-26 新增）===== */
/* 首页 Hero 双栏：左文案右图 */
.hero-cols { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.hero-visual img {
  width: 100%; display: block; border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, .22);
  box-shadow: 0 28px 56px rgba(0, 0, 0, .38);
}
@media (max-width: 960px) { .hero-cols { grid-template-columns: 1fr; gap: 34px; } }

/* 卡片顶部产品配图（贴边出血） */
.card-img {
  display: block;
  width: calc(100% + 48px); height: 180px;
  object-fit: cover; object-position: center;
  margin: -28px -24px 18px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: #EEF4F1;
}

/* 应用领域图片卡 */
.app-item { padding: 14px 14px 18px; }
.app-item .app-img {
  width: 100%; height: 108px; object-fit: cover;
  border-radius: 8px; display: block; margin-bottom: 12px;
}

/* 新闻封面实拍图 */
.news-cover { height: 168px; }
.news-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* 应用视频 */
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.video-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); transition: .25s;
}
.video-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.video-card video { width: 100%; height: 230px; object-fit: cover; display: block; background: #0E2A20; }
.video-card .vc-cap { padding: 14px 16px; font-size: 15px; font-weight: 600; color: var(--primary-dark); }
@media (max-width: 960px) { .video-grid { grid-template-columns: 1fr; } }

/* 关于页：媒体图与代理品牌卡 */
.about-media img { width: 100%; border-radius: 16px; box-shadow: var(--shadow-lg); display: block; }
.partner-card {
  background: #fff; border: 1px solid var(--border); border-radius: 14px;
  padding: 18px 20px; margin-top: 18px; box-shadow: var(--shadow);
}
.partner-card h4 { font-size: 14px; color: var(--primary-dark); margin: 0 0 10px; letter-spacing: 1px; }
.partner-row { display: flex; align-items: center; gap: 14px; padding: 10px 0; border-top: 1px dashed var(--border); }
.partner-row:first-of-type { border-top: none; padding-top: 2px; }
.partner-row img { width: 52px; height: 52px; object-fit: contain; flex-shrink: 0; }
.partner-row .p-mark {
  width: 52px; height: 52px; flex-shrink: 0; border-radius: 10px;
  background: var(--accent-light); color: var(--primary); font-weight: 800; font-size: 20px;
  display: flex; align-items: center; justify-content: center;
}
.partner-row .p-name { font-size: 15px; font-weight: 700; color: var(--text); }
.partner-row .p-desc { font-size: 13px; color: var(--text-light); margin-top: 2px; }