/* ========================================
   闻启芯生物 · 企业官网样式
   ======================================== */

:root {
  --primary: #0068b7;
  --primary-dark: #004d8a;
  --primary-light: #0084e8;
  --accent: #00a8e8;
  --dark: #0a1628;
  --text: #333;
  --text-light: #666;
  --text-muted: #999;
  --bg: #ffffff;
  --bg-light: #f5f8fc;
  --bg-section: #eef4fa;
  --border: #e5edf5;
  --shadow: 0 4px 24px rgba(0, 68, 135, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 68, 135, 0.12);
  --radius: 8px;
  --header-h: 72px;
  --transition: 0.3s ease;
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary); }

img { max-width: 100%; height: auto; display: block; }

ul { list-style: none; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 80px 0; }
.section--gray { background: var(--bg-light); }
.section--blue { background: var(--bg-section); }

.section-header { text-align: center; margin-bottom: 48px; }
.section-header__en {
  font-size: 14px;
  letter-spacing: 3px;
  color: var(--primary);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.section-header__title {
  font-size: 32px;
  font-weight: 700;
  color: var(--dark);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}
.btn--primary {
  background: var(--primary);
  color: #fff;
}
.btn--primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
}
.btn--outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn--outline:hover { background: var(--primary); color: #fff; }
.btn--white {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.5);
  backdrop-filter: blur(4px);
}
.btn--white:hover { background: #fff; color: var(--primary); }

/* ========== Header ========== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-h);
  transition: background var(--transition), box-shadow var(--transition);
}
.header--transparent { background: transparent; }
.header--solid {
  background: rgba(255,255,255,0.97);
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
  backdrop-filter: blur(8px);
}
.header--solid .nav-link { color: var(--text); }
.header--solid .logo-text { color: var(--dark); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.logo__img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
}
.logo__icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 16px;
}
.logo-text {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}
.logo-text small {
  display: block;
  font-size: 11px;
  font-weight: 400;
  opacity: 0.85;
}

.nav { display: flex; align-items: center; gap: 4px; }

.nav-item { position: relative; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  font-size: 14px;
  color: rgba(255,255,255,0.9);
  border-radius: 4px;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  color: #fff;
  background: rgba(255,255,255,0.12);
}
.header--solid .nav-link:hover,
.header--solid .nav-link.active {
  color: var(--primary);
  background: rgba(0,104,183,0.08);
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 160px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition);
}
.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown a {
  display: block;
  padding: 10px 20px;
  font-size: 13px;
  color: var(--text);
}
.nav-dropdown a:hover {
  background: var(--bg-light);
  color: var(--primary);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.menu-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: currentColor;
  transition: var(--transition);
}

/* ========== Hero Carousel ========== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
}
.hero__slides { height: 100%; position: relative; }
.hero__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
  display: flex;
  align-items: center;
}
.hero__slide.active { opacity: 1; z-index: 1; }

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,40,80,0.75) 0%, rgba(0,104,183,0.55) 100%);
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding: 0 24px;
  margin-left: max(24px, calc((100% - 1200px) / 2));
  color: #fff;
}
.hero__title {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  animation: fadeUp 0.8s ease;
}
.hero__subtitle {
  font-size: clamp(16px, 2vw, 20px);
  opacity: 0.9;
  margin-bottom: 32px;
  line-height: 1.6;
  animation: fadeUp 0.8s ease 0.15s both;
}
.hero__cta { animation: fadeUp 0.8s ease 0.3s both; }

.hero__dots {
  position: absolute;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}
.hero__dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  border: none;
  cursor: pointer;
  transition: var(--transition);
}
.hero__dot.active {
  background: #fff;
  width: 28px;
  border-radius: 5px;
}

.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  color: rgba(255,255,255,0.7);
  font-size: 12px;
  text-align: center;
  animation: bounce 2s infinite;
}
.hero__scroll::after {
  content: '';
  display: block;
  width: 20px; height: 20px;
  margin: 8px auto 0;
  border-right: 2px solid rgba(255,255,255,0.5);
  border-bottom: 2px solid rgba(255,255,255,0.5);
  transform: rotate(45deg);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ========== About Summary ========== */
.about-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-block__en {
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 8px;
}
.about-block__title {
  font-size: 28px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 24px;
}
.about-block__text p {
  color: var(--text-light);
  margin-bottom: 16px;
  text-align: justify;
}
.about-block__visual {
  aspect-ratio: 4/3;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #0068b7 0%, #00a8e8 50%, #004d8a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 600;
  text-align: center;
  padding: 40px;
  box-shadow: var(--shadow-lg);
}
.about-block__img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

/* ========== Stats ========== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item {
  padding: 32px 16px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.stat-item__value {
  font-size: 42px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-item__value span { font-size: 18px; }
.stat-item__label {
  font-size: 14px;
  color: var(--text-light);
}

/* ========== Products ========== */
.product-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.product-tab {
  padding: 10px 24px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #fff;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text);
}
.product-tab.active, .product-tab:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.product-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.product-card__img {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--bg-section), #d0e8f8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  overflow: hidden;
}
.product-card__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-card__emoji { font-size: 48px; }
.product-card__body { padding: 24px; }
.product-card__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 12px;
  line-height: 1.4;
}
.product-card__desc {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-card__meta {
  font-size: 12px;
  color: var(--primary);
  margin-bottom: 16px;
}
.product-card__link {
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
}
.product-card__link:hover { text-decoration: underline; }

.product-carousel {
  position: relative;
  overflow: hidden;
}
.product-carousel__track {
  display: flex;
  transition: transform 0.5s ease;
  gap: 24px;
}
.product-carousel__track .product-card {
  flex: 0 0 calc(33.333% - 16px);
  min-width: calc(33.333% - 16px);
}

/* ========== News ========== */
.news-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
}
.news-tab {
  padding: 10px 24px;
  border: none;
  background: none;
  font-size: 14px;
  cursor: pointer;
  color: var(--text-light);
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}
.news-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

.news-list { display: flex; flex-direction: column; gap: 0; }
.news-item {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  gap: 24px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.news-item:first-child { padding-top: 0; }
.news-item:hover { background: rgba(0,104,183,0.02); }

.news-item__date {
  text-align: center;
  color: var(--primary);
}
.news-item__date-day {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}
.news-item__date-year {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}
.news-item__title {
  font-size: 17px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 8px;
  transition: color var(--transition);
}
.news-item:hover .news-item__title { color: var(--primary); }
.news-item__summary {
  font-size: 14px;
  color: var(--text-light);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-item__more {
  font-size: 13px;
  color: var(--primary);
  white-space: nowrap;
  align-self: center;
}

/* ========== Applications ========== */
.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.app-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid transparent;
}
.app-card--with-img {
  padding: 0;
  overflow: hidden;
  text-align: left;
}
.app-card__banner {
  aspect-ratio: 16/10;
  overflow: hidden;
}
.app-card__banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}
.app-card--with-img:hover .app-card__banner img {
  transform: scale(1.05);
}
.app-card__body {
  padding: 24px;
}
.app-card--with-img .app-card__name,
.app-card--with-img .app-card__sub,
.app-card--with-img .app-card__desc {
  text-align: left;
}
.app-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.app-card__icon { font-size: 40px; margin-bottom: 16px; }
.app-card__name {
  font-size: 18px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 8px;
}
.app-card__sub {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.app-card__desc {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ========== CTA Banner ========== */
.cta-banner {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
  padding: 80px 0;
  text-align: center;
  color: #fff;
}
.cta-banner__title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-banner__sub {
  font-size: 18px;
  opacity: 0.9;
  margin-bottom: 32px;
}

/* ========== Footer ========== */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(4, 1fr);
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer__brand p {
  font-size: 13px;
  line-height: 1.8;
  margin-top: 16px;
}
.footer__contact {
  margin-top: 16px;
  font-size: 13px;
  line-height: 2;
}
.footer__heading {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer__links a {
  display: block;
  font-size: 13px;
  padding: 4px 0;
  color: rgba(255,255,255,0.6);
}
.footer__links a:hover { color: #fff; }
.footer__bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  line-height: 1.8;
}

/* ========== Page Header ========== */
.page-hero {
  padding: 140px 0 60px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  text-align: center;
}
.page-hero__title { font-size: 36px; font-weight: 700; margin-bottom: 12px; }
.page-hero__sub { font-size: 16px; opacity: 0.85; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  justify-content: center;
  margin-top: 16px;
}
.breadcrumb a { color: rgba(255,255,255,0.85); }
.breadcrumb a:hover { color: #fff; }

/* ========== Content Pages ========== */
.content-page { padding: 60px 0 80px; }
.content-page__body {
  max-width: 900px;
  margin: 0 auto;
}
.content-page__body h2 {
  font-size: 22px;
  color: var(--dark);
  margin: 32px 0 16px;
}
.content-page__body p {
  color: var(--text-light);
  margin-bottom: 16px;
  text-align: justify;
  line-height: 1.9;
}

.timeline { position: relative; padding-left: 32px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 8px; top: 0; bottom: 0;
  width: 2px;
  background: var(--border);
}
.timeline-item {
  position: relative;
  padding-bottom: 32px;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -28px; top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--primary);
}
.timeline-item__year {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.timeline-item__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 8px;
}
.timeline-item__desc {
  font-size: 14px;
  color: var(--text-light);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 32px;
}
.value-card {
  padding: 28px;
  background: var(--bg-light);
  border-radius: var(--radius);
  border-left: 4px solid var(--primary);
}
.value-card__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 8px;
}
.value-card__desc { font-size: 14px; color: var(--text-light); }

.partner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.partner-card {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 32px 20px;
  text-align: center;
  transition: var(--transition);
}
.partner-card:hover { box-shadow: var(--shadow); }
.partner-card__logo {
  width: 64px; height: 64px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
}
.partner-card__name {
  font-size: 14px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 4px;
}
.partner-card__type {
  font-size: 12px;
  color: var(--primary);
  margin-bottom: 8px;
}
.partner-card__desc { font-size: 12px; color: var(--text-light); }

.honor-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.honor-grid--single {
  grid-template-columns: minmax(240px, 360px);
}
.honor-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
}
.honor-card__icon { font-size: 36px; margin-bottom: 12px; }
.honor-card__name {
  font-size: 15px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 8px;
}
.honor-card__meta {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.8;
}

.pub-block {
  margin-bottom: 48px;
}
.pub-block__title {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--dark);
}
.pub-block__note {
  color: var(--text-light);
  font-size: 14px;
  line-height: 1.85;
  margin-bottom: 24px;
}
.pub-list {
  list-style: none;
  counter-reset: pub;
  padding: 0;
  margin: 0;
}
.pub-list__item {
  counter-increment: pub;
  position: relative;
  padding: 20px 24px 20px 56px;
  margin-bottom: 16px;
  background: var(--bg-light);
  border-radius: var(--radius);
  border-left: 4px solid var(--primary);
  font-size: 14px;
  line-height: 1.85;
  color: var(--text);
}
.pub-list__item::before {
  content: "[" counter(pub) "]";
  position: absolute;
  left: 16px;
  top: 20px;
  color: var(--primary);
  font-weight: 600;
  font-size: 13px;
}
.pub-list__doi {
  display: block;
  margin-top: 8px;
  font-size: 13px;
}
.pub-list__doi a {
  color: var(--primary);
  word-break: break-all;
}
.pub-list__doi a:hover {
  text-decoration: underline;
}

/* ========== Product Detail ========== */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.product-detail__img {
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--bg-section), #d0e8f8);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
  overflow: hidden;
}
.product-detail__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-detail__note {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.app-detail-hero {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 32px;
  aspect-ratio: 21/9;
}
.app-detail-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.app-detail-hero__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px 32px;
  background: linear-gradient(transparent, rgba(0,40,80,0.85));
  color: #fff;
}
.app-detail-hero__caption h2 {
  font-size: 24px;
  margin-bottom: 4px;
}
.app-detail-hero__caption p {
  font-size: 14px;
  opacity: 0.9;
}
.product-detail__name {
  font-size: 24px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
}
.product-detail__summary {
  font-size: 15px;
  color: var(--text-light);
  margin-bottom: 24px;
  line-height: 1.8;
}
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
}
.spec-table th, .spec-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.spec-table th {
  background: var(--bg-light);
  color: var(--dark);
  font-weight: 600;
  width: 35%;
}
.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 24px 0;
}
.spec-item {
  display: grid;
  grid-template-columns: 38% 1fr;
  background: #fff;
  min-height: 48px;
}
.spec-item__name {
  padding: 12px 16px;
  background: var(--bg-light);
  color: var(--dark);
  font-weight: 600;
  font-size: 13px;
  display: flex;
  align-items: center;
}
.spec-item__value {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text);
  display: flex;
  align-items: center;
  line-height: 1.5;
}

/* ========== Contact ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.contact-info__item {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}
.contact-info__icon {
  width: 48px; height: 48px;
  background: var(--bg-section);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.contact-info__label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.contact-info__value {
  font-size: 15px;
  color: var(--dark);
  font-weight: 500;
}
.contact-map {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-light);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
}
.contact-map iframe {
  width: 100%;
  height: 400px;
  border: none;
}

/* ========== Sub Nav (About) ========== */
.sub-nav {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.sub-nav a {
  padding: 10px 20px;
  font-size: 14px;
  border-radius: 4px;
  color: var(--text-light);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.sub-nav a.active, .sub-nav a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .product-grid, .app-grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .product-carousel__track .product-card {
    flex: 0 0 calc(50% - 12px);
    min-width: calc(50% - 12px);
  }
}

@media (max-width: 768px) {
  .menu-toggle { display: flex; color: #fff; }
  .header--solid .menu-toggle { color: var(--dark); }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .nav.open { transform: translateY(0); opacity: 1; }
  .nav-link { color: var(--text) !important; padding: 12px 16px; }
  .nav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding-left: 16px;
    display: none;
  }
  .nav-item.open .nav-dropdown { display: block; }

  .about-block, .product-detail, .contact-grid {
    grid-template-columns: 1fr;
  }
  .spec-grid {
    grid-template-columns: 1fr;
  }
  .product-grid, .app-grid, .honor-grid, .values-grid {
    grid-template-columns: 1fr;
  }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .news-item { grid-template-columns: 1fr; gap: 8px; }
  .news-item__date { text-align: left; display: flex; gap: 8px; align-items: baseline; }
  .footer__grid { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .hero__content { margin-left: 24px; }
  .product-carousel__track .product-card {
    flex: 0 0 100%;
    min-width: 100%;
  }
}