/* ============================================================
   序源生物科技 — 共用样式
   Design: 干净简洁 · 科技感 · 科研气质
   ============================================================ */

:root {
  --primary: #1B7AB8;
  --primary-dark: #0D5A8C;
  --primary-darker: #0A2647;
  --primary-light: #E8F4FB;
  --primary-soft: #F4FAFD;
  --accent: #4FB3E8;
  --accent-soft: #C8E5F5;
  --dark: #0F1F33;
  --text: #1F2937;
  --text-light: #6B7280;
  --text-muted: #9CA3AF;
  --border: #E5EBF1;
  --border-light: #F0F4F8;
  --bg: #FFFFFF;
  --bg-soft: #F8FBFD;
  --shadow-sm: 0 1px 3px rgba(10, 38, 71, 0.06);
  --shadow: 0 4px 14px rgba(10, 38, 71, 0.08);
  --shadow-md: 0 8px 28px rgba(10, 38, 71, 0.1);
  --shadow-lg: 0 16px 48px rgba(10, 38, 71, 0.12);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --container: 1200px;
  --header-h: 72px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Helvetica Neue", Arial, "Hiragino Sans GB", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
h1, h2, h3, h4, h5, h6 { margin: 0; color: var(--dark); font-weight: 600; line-height: 1.3; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* Layout */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-tight { padding: 56px 0; }
.section-soft { background: var(--bg-soft); }
.section-dark {
  background: linear-gradient(135deg, var(--primary-darker) 0%, #13315C 100%);
  color: rgba(255,255,255,0.92);
}

/* Section title */
.section-title { text-align: center; margin-bottom: 48px; }
.section-title .eyebrow {
  display: inline-block;
  font-size: 13px; font-weight: 500;
  color: var(--primary);
  background: var(--primary-light);
  padding: 5px 14px;
  border-radius: 999px;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.section-title h2 {
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 700;
  margin-bottom: 14px;
}
.section-title .sub {
  color: var(--text-light);
  font-size: 16px;
  max-width: 720px;
  margin: 0 auto;
}
.section-dark .section-title .eyebrow {
  color: #C8E5F5;
  background: rgba(127, 208, 255, 0.12);
}
.section-dark .section-title h2 { color: #FFFFFF; }
.section-dark .section-title .sub { color: rgba(255,255,255,0.7); }

/* Header / Nav */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.brand { display: flex; align-items: center; gap: 12px; color: var(--dark); font-weight: 600; }
.brand img { height: 38px; width: auto; }
.brand .brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand .brand-name { font-size: 18px; letter-spacing: 0.02em; }
.brand .brand-tag { font-size: 11px; color: var(--text-light); letter-spacing: 0.16em; font-weight: 400; }
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-menu a {
  position: relative;
  display: inline-block;
  padding: 10px 16px;
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-menu a:hover { color: var(--primary); background: var(--primary-light); }
.nav-menu a.active {
  color: var(--primary);
  background: var(--primary-light);
}
.nav-menu a.active::after {
  content: "";
  position: absolute;
  bottom: 4px; left: 50%; transform: translateX(-50%);
  width: 18px; height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px;
  font-size: 14px; font-weight: 500;
  color: #FFFFFF;
  background: var(--primary);
  border-radius: 999px;
  transition: all var(--transition);
}
.nav-cta:hover { background: var(--primary-dark); color: #FFFFFF; transform: translateY(-1px); }
.nav-toggle { display: none; }

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex; align-items: center;
  background: linear-gradient(135deg, #0A2647 0%, #1B7AB8 100%);
  color: #FFFFFF;
  overflow: hidden;
  isolation: isolate;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background: url("../images/hero-bg.svg") center/cover no-repeat;
  opacity: 0.55;
  z-index: -1;
}
.hero-content { max-width: 760px; padding: 80px 0; }
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px;
  background: rgba(127, 208, 255, 0.15);
  border: 1px solid rgba(127, 208, 255, 0.3);
  color: #C8E5F5;
  border-radius: 999px;
  font-size: 13px;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}
.hero h1 {
  font-size: clamp(34px, 5.4vw, 54px);
  font-weight: 700;
  line-height: 1.18;
  color: #FFFFFF;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}
.hero h1 .accent { color: #7FD0FF; }
.hero p.lead {
  font-size: clamp(16px, 1.8vw, 19px);
  color: rgba(255,255,255,0.85);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 640px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.btn-primary {
  background: #FFFFFF;
  color: var(--primary-dark);
}
.btn-primary:hover {
  background: #E8F4FB;
  color: var(--primary-darker);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}
.btn-ghost {
  background: rgba(255,255,255,0.08);
  color: #FFFFFF;
  border-color: rgba(255,255,255,0.3);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.16);
  color: #FFFFFF;
  border-color: rgba(255,255,255,0.5);
}
.btn-solid {
  background: var(--primary);
  color: #FFFFFF;
}
.btn-solid:hover {
  background: var(--primary-dark);
  color: #FFFFFF;
  transform: translateY(-1px);
}
.btn .arrow { transition: transform var(--transition); }
.btn:hover .arrow { transform: translateX(4px); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 64px;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,0.15);
}
.hero-stat .num {
  font-size: 36px;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.02em;
  display: block;
  line-height: 1.1;
}
.hero-stat .label {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  margin-top: 6px;
  letter-spacing: 0.04em;
}

/* Cards */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.card:hover {
  border-color: var(--accent-soft);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.card-icon {
  width: 56px; height: 56px;
  margin-bottom: 20px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 14px;
  background: var(--primary-light);
  transition: all var(--transition);
}
.card:hover .card-icon {
  background: var(--primary);
}
.card:hover .card-icon svg circle[fill="#E8F4FB"] { fill: var(--primary-light) !important; }
.card-icon svg { width: 36px; height: 36px; }
.card h3 {
  font-size: 20px;
  margin-bottom: 12px;
  color: var(--dark);
}
.card p { color: var(--text-light); margin: 0; font-size: 15px; line-height: 1.7; }
.card .more {
  display: inline-flex; align-items: center; gap: 4px;
  margin-top: 18px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
}
.card .more .arrow { transition: transform var(--transition); }
.card:hover .more .arrow { transform: translateX(4px); }

/* Platform / Service detail card */
.service-card {
  display: flex; flex-direction: column;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--transition);
}
.service-card:hover { box-shadow: var(--shadow-md); border-color: var(--accent-soft); transform: translateY(-3px); }
.service-card:hover::before { transform: scaleX(1); }
.service-card .num-tag {
  position: absolute; top: 28px; right: 28px;
  font-size: 12px; font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.05em;
}
.service-card h3 { font-size: 22px; margin-bottom: 12px; }
.service-card .lead-line { color: var(--text-light); margin-bottom: 20px; font-size: 15px; }
.service-card ul.tech-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; }
.service-card ul.tech-list li {
  font-size: 13px;
  color: var(--primary-dark);
  background: var(--primary-light);
  padding: 5px 12px;
  border-radius: 6px;
  font-weight: 500;
}
.service-card .more {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
}
.service-card .more .arrow { transition: transform var(--transition); }
.service-card:hover .more .arrow { transform: translateX(4px); }

/* Page banner */
.page-banner {
  position: relative;
  background: linear-gradient(135deg, var(--primary-darker) 0%, #13315C 100%);
  color: #FFFFFF;
  padding: 88px 0 72px;
  overflow: hidden;
}
.page-banner::before {
  content: "";
  position: absolute; inset: 0;
  background: url("../images/page-banner.svg") center/cover no-repeat;
  opacity: 0.45;
}
.page-banner > .container { position: relative; }
.page-banner .eyebrow {
  display: inline-block;
  font-size: 13px;
  color: #7FD0FF;
  background: rgba(127, 208, 255, 0.12);
  padding: 5px 14px;
  border-radius: 999px;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.page-banner h1 {
  font-size: clamp(28px, 4.5vw, 44px);
  color: #FFFFFF;
  margin-bottom: 12px;
}
.page-banner .breadcrumb {
  font-size: 14px;
  color: rgba(255,255,255,0.65);
}
.page-banner .breadcrumb a { color: rgba(255,255,255,0.85); }
.page-banner .breadcrumb a:hover { color: #FFFFFF; }

/* Content block */
.content-block { max-width: 760px; margin: 0 auto; }
.content-block p { color: var(--text); font-size: 16px; line-height: 1.85; }
.content-block h3 { margin: 32px 0 14px; font-size: 20px; color: var(--dark); }

/* Timeline */
.timeline { position: relative; max-width: 900px; margin: 0 auto; padding: 24px 0; }
.timeline::before {
  content: "";
  position: absolute; left: 80px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary-light), var(--primary) 30%, var(--primary) 70%, var(--primary-light));
}
.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  padding: 18px 0;
}
.timeline-year {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  text-align: right;
  padding-top: 4px;
}
.timeline-year small { display: block; font-size: 12px; color: var(--text-light); font-weight: 400; margin-top: 2px; }
.timeline-content {
  position: relative;
  padding-left: 28px;
}
.timeline-content::before {
  content: "";
  position: absolute; left: -8px; top: 8px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #FFFFFF;
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 4px rgba(27, 122, 184, 0.12);
}
.timeline-content h4 { font-size: 16px; margin-bottom: 6px; color: var(--dark); }
.timeline-content p { color: var(--text-light); font-size: 14px; line-height: 1.7; margin: 0; }

/* Stats */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-block {
  padding: 24px 16px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  transition: all var(--transition);
}
.stat-block:hover { background: rgba(255,255,255,0.08); transform: translateY(-2px); }
.stat-block .num {
  font-size: 40px;
  font-weight: 700;
  color: #7FD0FF;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.stat-block .label {
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  margin-top: 8px;
}

/* News list */
.news-list { max-width: 880px; margin: 0 auto; }
.news-item-link { display: block; }
.news-item-link .news-item { border-radius: var(--radius-sm); }
.news-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  transition: padding var(--transition);
}
.news-item:hover { padding-left: 8px; }
.news-item .date {
  font-size: 13px;
  color: var(--text-light);
}
.news-item .date strong {
  display: block;
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.1;
}
.news-item .body h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--dark);
  transition: color var(--transition);
}
.news-item:hover .body h3 { color: var(--primary); }
.news-item .body p { color: var(--text-light); font-size: 15px; line-height: 1.7; margin: 0; }
.news-item .tag {
  display: inline-block;
  font-size: 12px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 2px 10px;
  border-radius: 4px;
  margin-right: 8px;
  margin-bottom: 6px;
}

/* Feature list */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px 36px; margin-top: 32px; }
.feature-list li {
  display: flex; gap: 14px;
  align-items: flex-start;
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
}
.feature-list li::before {
  content: "";
  display: inline-block;
  flex-shrink: 0;
  width: 22px; height: 22px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--primary-light) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231B7AB8' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E") center/14px no-repeat;
}

/* Mission / Vision */
.mv-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.mv-card {
  padding: 36px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary-light) 0%, #FFFFFF 100%);
  border: 1px solid var(--accent-soft);
  position: relative;
}
.mv-card .label {
  font-size: 13px;
  color: var(--primary);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 12px;
}
.mv-card h3 {
  font-size: 24px;
  margin-bottom: 12px;
  color: var(--dark);
}
.mv-card p { color: var(--text); margin: 0; line-height: 1.85; }

/* Product grid */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.product-card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 24px 46px;
  transition: all var(--transition);
  position: relative;
  cursor: pointer;
}
.product-card:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-2px); }
.product-card:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.product-card h4 { font-size: 17px; margin-bottom: 8px; color: var(--dark); pointer-events: none; }
.product-card .en { font-size: 12px; color: var(--text-muted); margin-bottom: 10px; letter-spacing: 0.04em; pointer-events: none; }
.product-card p { color: var(--text-light); font-size: 14px; line-height: 1.6; margin: 0; pointer-events: none; }
.product-card::after {
  content: "查看详情 →";
  position: absolute; right: 20px; bottom: 16px;
  font-size: 12px; font-weight: 600; color: var(--primary);
  opacity: 0; transform: translateX(-6px);
  transition: opacity var(--transition), transform var(--transition);
  pointer-events: none;
}
.product-card:hover::after,
.product-card:focus-visible::after { opacity: 1; transform: translateX(0); }

/* CTA */
.cta-section {
  background: linear-gradient(135deg, var(--primary-darker) 0%, var(--primary) 100%);
  border-radius: var(--radius-lg);
  padding: 56px;
  text-align: center;
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute; inset: 0;
  background: url("../images/hero-bg.svg") center/cover no-repeat;
  opacity: 0.2;
}
.cta-section > * { position: relative; }
.cta-section h2 { color: #FFFFFF; font-size: clamp(24px, 3vw, 32px); margin-bottom: 14px; }
.cta-section p { color: rgba(255,255,255,0.85); font-size: 16px; margin-bottom: 28px; max-width: 560px; margin-left: auto; margin-right: auto; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; }
.contact-card {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  margin-bottom: 16px;
}
.contact-card .label {
  font-size: 12px;
  color: var(--text-light);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.contact-card .value {
  font-size: 18px;
  font-weight: 600;
  color: var(--dark);
}
.contact-card .desc { color: var(--text-light); font-size: 14px; margin-top: 8px; line-height: 1.6; }

.qr-card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
}
.qr-card img {
  width: 180px; height: 180px;
  margin: 0 auto 16px;
  border-radius: var(--radius-sm);
  display: block;
}
.qr-card h4 { font-size: 17px; margin-bottom: 6px; color: var(--dark); }
.qr-card .meta { font-size: 13px; color: var(--text-light); }

/* Footer */
.site-footer {
  background: var(--primary-darker);
  color: rgba(255,255,255,0.7);
  padding: 56px 0 24px;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand img { height: 36px; margin-bottom: 14px; }
.footer-brand .desc { color: rgba(255,255,255,0.6); font-size: 13px; line-height: 1.7; }
.footer-col h5 {
  font-size: 14px;
  color: #FFFFFF;
  margin-bottom: 18px;
  font-weight: 600;
  letter-spacing: 0.06em;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: rgba(255,255,255,0.65); font-size: 13px; }
.footer-col ul li a:hover { color: #7FD0FF; }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}
.footer-bottom .qr-mini { display: flex; gap: 14px; align-items: center; }
.footer-bottom .qr-mini img { width: 48px; height: 48px; border-radius: 4px; }
.footer-bottom .qr-mini span { font-size: 12px; color: rgba(255,255,255,0.55); }

/* Responsive */
@media (max-width: 992px) {
  .grid-4, .hero-stats, .stats-row { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .product-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .timeline::before { left: 16px; }
  .timeline-item { grid-template-columns: 1fr; gap: 8px; padding-left: 32px; }
  .timeline-year { text-align: left; font-size: 16px; }
  .timeline-content { padding-left: 0; }
  .timeline-content::before { left: -32px; }
}
@media (max-width: 720px) {
  .section { padding: 56px 0; }
  .nav-menu {
    display: none;
    position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column;
    background: #FFFFFF;
    border-bottom: 1px solid var(--border);
    padding: 12px;
    box-shadow: var(--shadow);
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 12px 16px; }
  .nav-toggle {
    display: flex; align-items: center; justify-content: center;
    width: 40px; height: 40px;
    border-radius: var(--radius-sm);
    color: var(--dark);
  }
  .nav-toggle:hover { background: var(--primary-light); }
  .brand .brand-tag { display: none; }
  .nav-cta { padding: 7px 14px; font-size: 13px; }
  .hero { min-height: auto; padding: 40px 0; }
  .hero-content { padding: 32px 0; }
  .grid-2, .grid-3, .grid-4, .hero-stats, .stats-row, .product-grid {
    grid-template-columns: 1fr;
  }
  .feature-list { grid-template-columns: 1fr; }
  .mv-grid { grid-template-columns: 1fr; }
  .cta-section { padding: 36px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 14px; text-align: center; }
  .news-item { grid-template-columns: 90px 1fr; gap: 16px; }
  .news-item .date strong { font-size: 22px; }
}

/* Utility */
.text-center { text-align: center; }
.mt-0 { margin-top: 0 !important; }
.mt-4 { margin-top: 24px; }
.mt-8 { margin-top: 48px; }
.mb-0 { margin-bottom: 0 !important; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-2 { gap: 12px; }

/* Animations */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.7s var(--transition) both; }
.fade-up.delay-1 { animation-delay: 0.1s; }
.fade-up.delay-2 { animation-delay: 0.2s; }
.fade-up.delay-3 { animation-delay: 0.3s; }

/* Back to top */
.back-to-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s, visibility 0.3s, transform 0.3s, background var(--transition);
  z-index: 90;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.back-to-top svg {
  width: 22px;
  height: 22px;
}
@media (max-width: 720px) {
  .back-to-top { right: 16px; bottom: 16px; width: 42px; height: 42px; }
  .back-to-top svg { width: 19px; height: 19px; }
}

/* ====== News Detail Page ====== */
.news-detail {
  max-width: 820px;
  margin: 0 auto;
}

.back-to-list {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light);
  padding: 8px 0;
  margin-bottom: 24px;
  transition: color var(--transition);
}
.back-to-list:hover {
  color: var(--primary);
}
.back-to-list svg {
  transition: transform var(--transition);
}
.back-to-list:hover svg {
  transform: translateX(-3px);
}

.news-detail-card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-sm);
}
@media (max-width: 720px) {
  .news-detail-card { padding: 28px 20px; }
}

.news-detail-header {
  text-align: center;
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}
.news-detail-header h1 {
  font-size: clamp(22px, 3.5vw, 30px);
  line-height: 1.4;
  margin-bottom: 20px;
  color: var(--dark);
}
.news-detail-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.news-detail-meta .tag {
  display: inline-block;
  font-size: 13px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 14px;
  border-radius: 999px;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.news-detail-date {
  font-size: 14px;
  color: var(--text-light);
}

/* 新闻正文内容 — 统一排版，兼容 mdnice 等富文本 */
.news-detail-content {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
  word-break: break-word;
  overflow-wrap: break-word;
}
.news-detail-content > section,
.news-detail-content > article {
  all: unset;
  display: block;
}
.news-detail-content h1,
.news-detail-content h2,
.news-detail-content h3,
.news-detail-content h4 {
  color: var(--dark);
  margin: 28px 0 14px;
  line-height: 1.4;
}
.news-detail-content h1 { font-size: 24px; }
.news-detail-content h2 { font-size: 22px; }
.news-detail-content h3 { font-size: 19px; }
.news-detail-content h4 { font-size: 17px; }
.news-detail-content p {
  margin: 0 0 1.2em;
  line-height: 1.85;
  color: var(--text);
}
.news-detail-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin: 16px 0;
}
.news-detail-content blockquote {
  margin: 20px 0;
  padding: 16px 24px;
  border-left: 4px solid var(--primary);
  background: var(--primary-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text);
}
.news-detail-content blockquote p {
  margin: 0;
}
.news-detail-content ul,
.news-detail-content ol {
  margin: 0 0 1.2em;
  padding-left: 28px;
}
.news-detail-content ul li,
.news-detail-content ol li {
  margin-bottom: 6px;
  line-height: 1.8;
  color: var(--text);
}
.news-detail-content ul { list-style: disc; }
.news-detail-content ol { list-style: decimal; }
.news-detail-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.news-detail-content a:hover {
  color: var(--primary-dark);
}
.news-detail-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}
.news-detail-content table th,
.news-detail-content table td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.news-detail-content table th {
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--dark);
}
.news-detail-content code {
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  font-size: 0.9em;
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 2px 6px;
  border-radius: 4px;
}
.news-detail-content pre {
  background: #1a2740;
  color: #e2e8f0;
  padding: 20px 24px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.6;
  margin: 20px 0;
}
.news-detail-content pre code {
  background: none;
  color: inherit;
  padding: 0;
}
.news-detail-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

/* ====== Partners / Clients Logo Grid ====== */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.partner-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 24px 16px;
  background: var(--bg-soft, #F5F8FB);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}
.partner-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  background: #FFFFFF;
}
.partner-item img {
  width: 96px;
  height: 96px;
  object-fit: contain;
  filter: grayscale(40%) opacity(0.85);
  transition: filter var(--transition), transform var(--transition);
}
.partner-item:hover img {
  filter: grayscale(0%) opacity(1);
  transform: scale(1.06);
}
.partner-item .name {
  font-size: 13px;
  color: var(--text-light);
  text-align: center;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.partner-item:hover .name {
  color: var(--primary-dark);
}

/* 暗色背景下的合作伙伴 logo 卡片 */
.section-dark .partner-item {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.12);
}
.section-dark .partner-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--primary-light);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}
.section-dark .partner-item .name {
  color: rgba(255, 255, 255, 0.7);
}
.section-dark .partner-item:hover .name {
  color: #FFFFFF;
}

@media (max-width: 720px) {
  .partner-grid { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 16px; }
  .partner-item { padding: 18px 10px; }
  .partner-item img { width: 76px; height: 76px; }
  .partner-item .name { font-size: 12px; }
  .partner-more .more-num { font-size: 28px; }
}

/* 溢出卡片 "+500+" — 暗示还有更多合作单位 */
.partner-more {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px 16px;
  background: transparent;
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), background var(--transition);
}
.partner-more .more-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  letter-spacing: -0.02em;
}
.partner-more .more-label {
  font-size: 13px;
  color: var(--text-light);
  font-weight: 500;
}
.partner-more:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}
.partner-more:hover .more-num {
  transform: scale(1.05);
}
.partner-more .more-num { transition: transform var(--transition); }

/* 暗色背景下的溢出卡片 */
.section-dark .partner-more {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.02);
}
.section-dark .partner-more .more-num { color: var(--primary-light); }
.section-dark .partner-more .more-label { color: rgba(255, 255, 255, 0.6); }
.section-dark .partner-more:hover {
  border-color: var(--primary-light);
  background: rgba(255, 255, 255, 0.06);
}

/* 底部说明文字 */
.partner-note {
  text-align: center;
  margin-top: 28px;
  font-size: 14px;
  color: var(--text-light);
  letter-spacing: 0.03em;
}
.partner-note .dot { color: var(--primary); margin: 0 8px; }
.section-dark .partner-note { color: rgba(255, 255, 255, 0.5); }
.section-dark .partner-note .dot { color: var(--primary-light); }

/* ===== 产品详情弹窗 ===== */
.modal-open { overflow: hidden; }
.pm-overlay[hidden] { display: none; }
.pm-overlay {
  position: fixed; inset: 0; z-index: 1100;
  background: rgba(10, 38, 71, 0.55);
  -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  opacity: 0; visibility: hidden; transition: opacity .25s ease, visibility .25s ease;
}
.pm-overlay.open { opacity: 1; visibility: visible; }
.pm-dialog {
  background: #FFFFFF; border-radius: var(--radius-lg);
  max-width: 640px; width: 100%; max-height: 86vh; overflow-y: auto;
  box-shadow: var(--shadow-lg); position: relative;
  transform: translateY(16px) scale(.98);
  transition: transform .28s cubic-bezier(.4, 0, .2, 1);
}
.pm-overlay.open .pm-dialog { transform: translateY(0) scale(1); }
.pm-hero {
  background: linear-gradient(135deg, var(--primary-darker) 0%, var(--primary) 100%);
  color: #FFFFFF; padding: 28px 30px 26px; position: relative;
}
.pm-eyebrow { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; opacity: .82; }
.pm-title { font-size: 24px; margin: 6px 0 4px; color: #FFFFFF; font-weight: 700; }
.pm-en { font-size: 13px; opacity: .85; letter-spacing: .03em; }
.pm-close {
  position: absolute; top: 16px; right: 16px; width: 36px; height: 36px;
  border: none; border-radius: 50%; background: rgba(255, 255, 255, .18);
  color: #FFFFFF; font-size: 20px; line-height: 1; cursor: pointer;
  transition: background .2s ease;
}
.pm-close:hover { background: rgba(255, 255, 255, .34); }
.pm-body { padding: 26px 30px 30px; }
.pm-lead { font-size: 15px; color: var(--text); line-height: 1.75; margin: 0 0 22px; }
.pm-section { margin-bottom: 20px; }
.pm-section h5 {
  font-size: 13px; color: var(--primary); letter-spacing: .06em;
  margin: 0 0 10px; display: flex; align-items: center; gap: 8px; font-weight: 700;
}
.pm-section h5::before {
  content: ""; width: 4px; height: 14px; border-radius: 2px;
  background: var(--primary); display: inline-block;
}
.pm-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.pm-tag {
  font-size: 12px; color: var(--primary-dark); background: var(--primary-light);
  padding: 5px 12px; border-radius: 999px;
}
.pm-list { margin: 0; padding-left: 18px; color: var(--text-light); font-size: 14px; line-height: 1.8; }
.pm-list li { margin-bottom: 4px; }
.pm-actions { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }
.pm-actions .btn { flex: 1; text-align: center; min-width: 140px; }
@media (max-width: 520px) {
  .pm-hero { padding: 22px 20px; }
  .pm-body { padding: 22px 20px 26px; }
  .pm-title { font-size: 20px; }
  .pm-actions { flex-direction: column; }
}