/* 参考 91pvksolar 风格 - 企业官网样式 */
:root {
  --primary: #0d47a1;
  --primary-light: #1976d2;
  --primary-dark: #002171;
  --accent: #00acc1;
  --text: #212121;
  --text-muted: #616161;
  --bg: #fafafa;
  --white: #fff;
  --border: #e0e0e0;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-hover: 0 4px 20px rgba(0,0,0,0.12);
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--text);
  line-height: 1.6;
  background-color: #f6f9fc;
  background-image:
    radial-gradient(circle at 8% 18%, rgba(25, 118, 210, 0.08) 0, transparent 28%),
    radial-gradient(circle at 92% 72%, rgba(0, 172, 193, 0.07) 0, transparent 30%),
    linear-gradient(rgba(13, 71, 161, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13, 71, 161, 0.025) 1px, transparent 1px);
  background-size: auto, auto, 72px 72px, 72px 72px;
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul {
  list-style: none;
}

/* 顶部导航 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--white);
  box-shadow: var(--shadow);
  transition: background 0.3s, box-shadow 0.3s;
}

.site-header.scrolled {
  box-shadow: var(--shadow-hover);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-dark);
}

.logo span {
  color: var(--primary-dark);
}

.nav-main {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-main a {
  padding: 8px 16px;
  font-size: 0.95rem;
  color: var(--text);
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}

.nav-main a:hover,
.nav-main a.active {
  color: var(--primary);
  background: rgba(13, 71, 161, 0.06);
}

/* 下拉菜单 */
.nav-item {
  position: relative;
}

.nav-item .submenu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background: var(--white);
  box-shadow: var(--shadow-hover);
  border-radius: 8px;
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
}

.nav-item:hover .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.submenu a {
  display: block;
  padding: 10px 20px;
  font-size: 0.9rem;
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text);
}

/* Banner 轮播 */
.banner-carousel-wrap {
  margin-top: 64px;
  min-height: 460px;
  position: relative;
  background:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(120, 200, 255, 0.18) 0%, transparent 55%),
    linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
}

.banner-carousel {
  position: relative;
  width: 100%;
  min-height: 460px;
  overflow: hidden;
}

.banner-track {
  display: flex;
  transition: transform 0.4s ease;
  min-height: 460px;
}

.banner-slide {
  flex: 0 0 100%;
  width: 100%;
  min-height: 460px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--white);
  overflow: hidden;
}

.banner-slide--hero-1 {
  background:
    linear-gradient(160deg, rgba(0, 40, 80, 0.45) 0%, transparent 45%),
    linear-gradient(145deg, #0c2238 0%, #1a4d6e 32%, #25658c 62%, #3d8cc4 100%);
}

.banner-slide--hero-2 {
  background:
    linear-gradient(200deg, rgba(0, 30, 70, 0.5) 0%, transparent 50%),
    linear-gradient(145deg, #061a2e 0%, #0d3d5c 38%, #1a5f8a 68%, #2a7ab8 100%);
}

.banner-slide--hero-1::before,
.banner-slide--hero-2::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 52px 52px;
  -webkit-mask-image: radial-gradient(ellipse 85% 75% at 50% 45%, #000 20%, transparent 72%);
  mask-image: radial-gradient(ellipse 85% 75% at 50% 45%, #000 20%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.banner-slide--hero-1::after,
.banner-slide--hero-2::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 28%, rgba(130, 220, 255, 0.28) 0%, transparent 38%),
    radial-gradient(circle at 88% 72%, rgba(40, 160, 255, 0.22) 0%, transparent 36%),
    radial-gradient(circle at 72% 18%, rgba(255, 255, 255, 0.08) 0%, transparent 22%),
    repeating-linear-gradient(
      118deg,
      transparent,
      transparent 72px,
      rgba(255, 255, 255, 0.04) 72px,
      rgba(255, 255, 255, 0.04) 73px
    );
  pointer-events: none;
  z-index: 0;
}

.banner-slide-panel {
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 40px 24px 72px;
  gap: 28px;
  min-height: 460px;
  position: relative;
  z-index: 1;
}

.banner-content--hero {
  padding: 0;
  width: 100%;
}

.banner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 28px;
}

.btn-banner-primary,
.btn-banner-secondary {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
}

.btn-banner-primary {
  background: linear-gradient(135deg, #26c6da 0%, #00acc1 50%, #0097a7 100%);
  color: var(--white);
  border: none;
  box-shadow: 0 6px 24px rgba(0, 172, 193, 0.35);
}

.btn-banner-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 172, 193, 0.45);
  color: var(--white);
}

.btn-banner-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.42);
}

.btn-banner-secondary:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--white);
  transform: translateY(-2px);
}

.banner-visual {
  position: relative;
  width: min(260px, 72vw);
  height: min(260px, 72vw);
  flex-shrink: 0;
}

.banner-orbit-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: conic-gradient(
    from 200deg,
    rgba(0, 200, 255, 0.35),
    transparent 35%,
    rgba(255, 255, 255, 0.12) 55%,
    transparent 75%,
    rgba(38, 198, 218, 0.25) 100%
  );
  animation: banner-orbit-spin 22s linear infinite;
}

.banner-slide--hero-2 .banner-orbit-ring {
  background: conic-gradient(
    from 120deg,
    rgba(100, 180, 255, 0.3),
    transparent 40%,
    rgba(255, 255, 255, 0.1) 62%,
    transparent 82%,
    rgba(0, 172, 193, 0.28) 100%
  );
}

.banner-visual--alt .banner-orbit-core {
  background:
    radial-gradient(circle at 68% 32%, rgba(255, 255, 255, 0.28) 0%, transparent 40%),
    radial-gradient(circle at 22% 72%, rgba(100, 180, 255, 0.22) 0%, transparent 48%),
    linear-gradient(165deg, rgba(26, 95, 138, 0.55) 0%, rgba(13, 71, 161, 0.5) 100%);
}

.banner-orbit-core {
  position: absolute;
  inset: 16%;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.35) 0%, transparent 42%),
    radial-gradient(circle at 70% 78%, rgba(0, 200, 255, 0.2) 0%, transparent 45%),
    linear-gradient(155deg, rgba(0, 150, 200, 0.45) 0%, rgba(13, 71, 161, 0.55) 100%);
  box-shadow:
    0 0 48px rgba(0, 200, 255, 0.22),
    inset 0 0 36px rgba(255, 255, 255, 0.12);
}

.banner-float-particles {
  position: absolute;
  inset: -12%;
  border-radius: 50%;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.5) 0, rgba(255, 255, 255, 0) 2px),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.35) 0, rgba(255, 255, 255, 0) 1.5px),
    radial-gradient(circle at 65% 85%, rgba(186, 230, 253, 0.5) 0, rgba(255, 255, 255, 0) 2px),
    radial-gradient(circle at 12% 70%, rgba(255, 255, 255, 0.3) 0, rgba(255, 255, 255, 0) 1.5px);
  animation: banner-drift 14s ease-in-out infinite alternate;
  pointer-events: none;
  opacity: 0.85;
}

.banner-slide--active .banner-visual {
  animation: banner-visual-pop 0.75s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.banner-slide--active .banner-content--hero {
  animation: banner-hero-rise 0.6s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.banner-content-lead {
  max-width: 560px;
  margin: 16px auto 0;
  font-size: 1rem;
  opacity: 0.92;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.94);
}

@keyframes banner-orbit-spin {
  to { transform: rotate(360deg); }
}

@keyframes banner-drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(4%, -3%) scale(1.04); }
}

@keyframes banner-visual-pop {
  from {
    opacity: 0;
    transform: scale(0.88) translateY(12px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes banner-hero-rise {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 900px) {
  .banner-slide-panel {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 56px;
    padding: 48px 40px 80px;
    text-align: left;
  }

  .banner-content--hero {
    text-align: left;
  }

  .banner-content-lead {
    margin-left: 0;
    margin-right: 0;
  }

  .banner-actions {
    justify-content: flex-start;
  }

  .banner-visual {
    width: min(300px, 32vw);
    height: min(300px, 32vw);
  }
}

@media (prefers-reduced-motion: reduce) {
  .banner-orbit-ring,
  .banner-float-particles {
    animation: none;
  }

  .banner-slide--active .banner-visual,
  .banner-slide--active .banner-content--hero {
    animation: none;
  }
}

.banner-slide > a {
  display: block;
  width: 100%;
  height: 100%;
  color: inherit;
  text-decoration: none;
}

.banner-slide img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  display: block;
}

.banner-slide .banner-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px;
  background: linear-gradient(transparent, rgba(0,0,0,0.6));
}

.banner-slide .banner-caption h2 {
  font-size: 1.25rem;
  margin-bottom: 4px;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 2;
  transition: background 0.2s;
}

.carousel-btn:hover {
  background: rgba(255,255,255,0.4);
}

.carousel-prev { left: 16px; }
.carousel-next { right: 16px; }

.carousel-dots {
  position: absolute;
  bottom: 16px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 8px;
  z-index: 2;
}

.carousel-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: background 0.2s;
}

.carousel-dots span.active {
  background: var(--white);
}

.banner-fallback {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 24px;
  color: var(--white);
  pointer-events: none;
}

.banner-fallback.hidden {
  display: none;
}

.banner-carousel.hidden {
  display: none;
}

.banner-content {
  position: relative;
  z-index: 1;
}

.banner-content h1 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  margin-bottom: 12px;
  font-weight: 700;
}

.banner-slide .banner-content h1 {
  text-shadow: 0 2px 28px rgba(0, 20, 45, 0.5);
  font-size: clamp(1.85rem, 4.2vw, 2.5rem);
  letter-spacing: 0.02em;
  line-height: 1.25;
}

.banner-content--hero .en {
  font-size: 1.05rem;
  font-weight: 500;
  color: rgba(186, 230, 253, 0.92);
  opacity: 1;
  margin-bottom: 0;
  letter-spacing: 0.12em;
}

.banner-content .en {
  font-size: 1rem;
  opacity: 0.9;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}

.banner-content p {
  max-width: 640px;
  margin: 0 auto;
  font-size: 1rem;
  opacity: 0.95;
  line-height: 1.8;
}

.banner-content--hero p.en {
  margin-bottom: 12px;
}

/* 通用区块 */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  text-align: center;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 40px;
  font-size: 0.95rem;
}

/* 公司简介 */
.intro {
  background: var(--white);
  box-shadow: var(--shadow);
  border-radius: 12px;
  padding: 48px;
  margin-bottom: 24px;
}

.intro p {
  color: var(--text);
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: 32px;
}

.timeline {
  display: grid;
  gap: 16px;
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 12px 0;
  border-left: 3px solid var(--primary-light);
  padding-left: 20px;
  margin-left: 4px;
}

.timeline-item strong {
  color: var(--primary);
  min-width: 100px;
}

/* 产品网格（产品中心列表：大屏固定三列，便于 3+3 排布） */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

@media (max-width: 992px) {
  .products-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .products-grid {
    grid-template-columns: 1fr;
  }
}

/* 首页产品中心：三列整体居中对齐 */
.products-grid--home {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 300px));
  justify-content: center;
  align-items: stretch;
  gap: 24px;
  width: 100%;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;
}

@media (max-width: 992px) {
  .products-grid--home {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .products-grid--home {
    grid-template-columns: minmax(0, 100%);
    max-width: 400px;
  }
}

.product-card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.product-card .thumb {
  aspect-ratio: 4/3;
  background: linear-gradient(145deg, #e3f2fd, #bbdefb);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--primary-light);
  overflow: hidden;
}

.product-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-card .thumb.thumb-photo {
  background: #000;
}

.product-card .thumb.thumb-photo img {
  object-fit: contain;
  padding: 8px;
  box-sizing: border-box;
}

.product-card .thumb.thumb-photo.thumb-photo-light {
  background: #eceff1;
}

.product-card .info {
  padding: 20px;
}

.product-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--text);
}

.product-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* 新闻列表 */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.news-list--card {
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

a.news-item {
  text-decoration: none;
  color: inherit;
}

.news-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}

.news-item:last-child {
  border-bottom: none;
}

.news-item:hover {
  background: rgba(13, 71, 161, 0.04);
}

.news-item h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
  margin-right: 20px;
}

.news-item-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.news-item .meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.news-item .tag {
  font-size: 0.75rem;
  color: var(--primary);
  background: rgba(13, 71, 161, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
}

@media (max-width: 640px) {
  .news-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .news-item h4 {
    margin-right: 0;
  }
}

/* 页脚 */
.site-footer {
  background: var(--primary-dark);
  color: var(--white);
  padding: 48px 24px 32px;
  margin-top: 60px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 40px;
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
  align-items: start;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  column-gap: 18px;
  row-gap: 8px;
}

.footer-nav h4,
.footer-contact h4 {
  font-size: 0.9rem;
  margin-bottom: 16px;
  opacity: 0.95;
}

.footer-nav h4 {
  flex: 1 0 100%;
  margin-bottom: 10px;
}

.footer-nav a,
.footer-contact a {
  font-size: 0.9rem;
  opacity: 0.85;
  transition: opacity 0.2s;
}

.footer-nav a {
  display: inline-block;
  margin: 0;
  white-space: nowrap;
}

.footer-contact a {
  display: block;
  margin-bottom: 8px;
}

.footer-nav a:hover,
.footer-contact a:hover {
  opacity: 1;
}

.footer-contact a[href^="tel:"],
.footer-contact a[href^="mailto:"] {
  margin-bottom: 4px;
}

.footer-contact-meta {
  display: block;
  font-size: 0.9rem;
  opacity: 0.85;
  margin-bottom: 8px;
  line-height: 1.5;
}

.footer-bottom {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  padding-top: 16px;
  margin-top: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.8125rem;
  line-height: 1.4;
}

.footer-copyright {
  margin: 0;
  flex: 1 1 auto;
  min-width: 0;
  text-align: left;
  color: rgba(255, 255, 255, 0.92);
}

.footer-icp {
  margin: 0;
  flex: 0 1 auto;
  min-width: 0;
  max-width: 100%;
  text-align: right;
  color: rgba(255, 255, 255, 0.95);
}

.footer-icp a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 2px;
  font-weight: 500;
}

.footer-icp a:hover {
  color: #b3d4fc;
}

/* 页面标题区 */
.page-hero {
  margin-top: 64px;
  padding: 48px 24px;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background:
    radial-gradient(circle at 15% 25%, rgba(68, 183, 255, 0.32) 0%, transparent 34%),
    radial-gradient(circle at 88% 70%, rgba(0, 172, 193, 0.2) 0%, transparent 30%),
    linear-gradient(135deg, #082844 0%, #104f78 48%, #2277aa 100%);
  color: var(--white);
  text-align: center;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(118deg, transparent 48%, rgba(255, 255, 255, 0.07) 49%, transparent 50%),
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 180px 100%, 54px 54px, 54px 54px;
  -webkit-mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.25));
  mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.25));
  pointer-events: none;
}

.page-hero h1 {
  font-size: 1.75rem;
  margin-bottom: 8px;
  word-break: break-word;
}

.page-hero p {
  opacity: 0.9;
  font-size: 0.95rem;
}

/* 联系页 */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  max-width: 760px;
  margin: 0 auto;
}

.contact-card {
  background: var(--white);
  padding: 24px 28px;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.contact-card h3 {
  font-size: 1.6rem;
  color: var(--primary);
  margin-bottom: 14px;
}

.contact-card p,
.contact-card a {
  margin-bottom: 6px;
  color: var(--text);
  font-size: 1.1rem;
  line-height: 1.75;
}

.contact-address {
  max-width: 760px;
  margin: 24px auto 0;
  background: var(--white);
  padding: 24px 28px;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.contact-address h3 {
  margin-bottom: 14px;
  color: var(--primary);
  font-size: 1.6rem;
}

.contact-address p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text);
}

/* 关于页 */
.about-content {
  background: var(--white);
  padding: 48px;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.about-content h2 {
  font-size: 1.25rem;
  color: var(--primary);
  margin: 32px 0 16px;
}

.about-content h2:first-child {
  margin-top: 0;
}

.about-content p {
  margin-bottom: 16px;
  line-height: 1.9;
}

.about-timeline {
  margin-top: 8px;
}

.about-timeline-row {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 0 20px;
  padding-bottom: 28px;
}

.about-timeline-row:last-child {
  padding-bottom: 0;
}

.about-timeline-linecell {
  position: relative;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.about-timeline-linecell::after {
  content: "";
  position: absolute;
  top: 18px;
  bottom: -28px;
  width: 2px;
  background: var(--primary);
}

.about-timeline-row:last-child .about-timeline-linecell::after {
  display: none;
}

.about-timeline-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--white);
  box-shadow: 0 0 0 1px var(--primary);
  flex-shrink: 0;
  z-index: 1;
}

.about-timeline-date {
  color: var(--primary);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 6px;
}

.about-timeline-textcell p {
  margin-bottom: 0;
}

/* 招贤纳士 */
.jobs-list .news-item h4 {
  font-size: 1rem;
}

.jobs-list .news-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* 产品分类 */
.category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
  justify-content: center;
}

.category-tabs a {
  padding: 10px 20px;
  background: var(--white);
  border-radius: 8px;
  box-shadow: var(--shadow);
  font-size: 0.95rem;
  transition: background 0.2s, color 0.2s;
}

.category-tabs a:hover,
.category-tabs a.active {
  background: var(--primary);
  color: var(--white);
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 12px 24px;
  background: var(--primary);
  color: var(--white);
  border-radius: 8px;
  font-size: 0.95rem;
  transition: background 0.2s, transform 0.2s;
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}

.text-center {
  text-align: center;
  margin-top: 32px;
}

/* 响应式 */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav-main {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 16px;
    box-shadow: var(--shadow-hover);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s;
  }

  .nav-main.open {
    max-height: 80vh;
    overflow-y: auto;
  }

  .nav-main .submenu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding-left: 16px;
    max-height: 0;
    overflow: hidden;
  }

  .nav-item:hover .submenu,
  .nav-item.submenu-open .submenu {
    max-height: 560px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-nav {
    margin-left: auto;
    margin-right: auto;
    max-width: 100%;
    justify-content: center;
  }

  .footer-nav a {
    white-space: normal;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .intro {
    padding: 24px;
  }

  .about-content {
    padding: 24px;
  }

  .product-detail-head {
    grid-template-columns: 1fr;
  }

  .product-detail-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .product-detail-actions .btn {
    text-align: center;
  }
}

/* 产品详情页 */
.section--product-detail {
  padding-top: 24px;
}

.product-detail-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.breadcrumb {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  line-height: 1.6;
}

.breadcrumb a {
  color: var(--primary);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  margin: 0 8px;
  opacity: 0.5;
}

.breadcrumb-current {
  color: var(--text);
}

.product-detail-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 40px;
  row-gap: 12px;
  align-items: start;
  margin-bottom: 48px;
}

.product-detail-head-meta {
  grid-column: 1 / -1;
}

.product-detail-figure {
  margin: 0;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: #000;
}

.product-detail-figure img {
  width: 100%;
  height: auto;
  display: block;
  vertical-align: middle;
  object-fit: contain;
}

.product-detail-placeholder {
  aspect-ratio: 4 / 3;
  border-radius: 12px;
  background: linear-gradient(145deg, #e3f2fd, #bbdefb);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(3rem, 12vw, 4.5rem);
  box-shadow: var(--shadow);
}

.product-detail-intro {
  padding-top: 0;
}

.product-detail-cat {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(13, 71, 161, 0.08);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 0;
}

.product-detail-summary {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 24px;
}

.product-detail-summary--table {
  margin-bottom: 24px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.product-spec-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--text);
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

.product-spec-table thead th {
  text-align: left;
  font-weight: 600;
  color: var(--primary);
  background: rgba(13, 71, 161, 0.08);
  padding: 10px 12px;
  border-bottom: 1px solid rgba(13, 71, 161, 0.15);
  white-space: nowrap;
}

.product-spec-table tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.product-spec-table tbody td:nth-child(1) {
  width: 3.5rem;
  text-align: center;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.product-spec-table tbody td:nth-child(2) {
  width: 8.5rem;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
}

.product-spec-table tbody tr:last-child td {
  border-bottom: none;
}

.product-spec-table tbody tr:hover td {
  background: rgba(13, 71, 161, 0.03);
}

.product-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.product-detail-btn-muted {
  border-color: var(--border);
  color: var(--text-muted);
}

.product-detail-btn-muted:hover {
  border-color: var(--primary);
  color: var(--white);
}

.product-detail-sections {
  border-top: 1px solid var(--border);
  padding-top: 8px;
}

.product-detail-block {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.product-detail-block:last-child {
  border-bottom: none;
}

.product-detail-block h2 {
  font-size: 1.15rem;
  color: var(--primary);
  margin-bottom: 16px;
  font-weight: 600;
}

.product-detail-block-body p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 12px;
}

.product-detail-block-body p:last-child {
  margin-bottom: 0;
}

.product-detail-block-body ul {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

.product-detail-block-body li {
  margin-bottom: 8px;
}

.product-detail-block-body li:last-child {
  margin-bottom: 0;
}

.product-detail-empty {
  text-align: center;
  padding: 40px 16px 60px;
  max-width: 480px;
  margin: 0 auto;
}

.product-detail-empty p {
  color: var(--text-muted);
  line-height: 1.7;
}

/* 让白底产品图在黑底容器上“变黑底”显示（仅给需要的图片加此类名） */
.img-bg-to-black {
  mix-blend-mode: multiply;
}

/* 新闻详情页 */
.section--news-detail {
  padding-top: 24px;
}

.news-detail-wrap {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

.news-detail-article {
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 32px 28px 40px;
}

.news-detail-header {
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.news-detail-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(13, 71, 161, 0.08);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.news-detail-meta {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.news-detail-meta time {
  font-variant-numeric: tabular-nums;
}

.news-detail-lead {
  font-size: 1.05rem;
  color: var(--text);
  line-height: 1.75;
  margin: 0;
}

.news-detail-body {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.85;
}

.news-detail-body p {
  margin: 0 0 16px;
}

.news-detail-body p:last-child {
  margin-bottom: 0;
}

.news-detail-subheading {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin: 28px 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.news-detail-subheading:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.news-detail-figure {
  margin: 28px 0;
  text-align: center;
}

.news-detail-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.news-detail-figure figcaption {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.news-detail-footer {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.literature-detail-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.literature-highlight {
  margin: 24px 0;
  padding: 20px 24px;
  border-radius: 12px;
  background: #edf5f6;
}

.literature-highlight-label {
  margin: 0 0 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: #157b77;
}

.literature-highlight-value {
  margin: 0 0 8px;
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.2;
  color: #1f4d78;
}

.literature-highlight-note {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.news-detail-back {
  display: inline-block;
}

.news-detail-empty {
  text-align: center;
  padding: 48px 20px 56px;
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.news-detail-empty p {
  color: var(--text-muted);
  line-height: 1.7;
}

/* 招聘详情页 */
.section--job-detail {
  padding-top: 24px;
}

.job-detail-wrap {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

.job-detail-article {
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 32px 28px 40px;
}

.job-detail-header {
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.job-detail-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  margin-bottom: 16px;
}

.job-detail-dept {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(13, 71, 161, 0.08);
  padding: 4px 12px;
  border-radius: 999px;
}

.job-detail-meta-item {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.job-detail-lead {
  font-size: 1.05rem;
  color: var(--text);
  line-height: 1.75;
  margin: 0;
}

.job-detail-body {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.85;
}

.job-detail-block {
  margin-bottom: 28px;
}

.job-detail-block:last-of-type {
  margin-bottom: 0;
}

.job-detail-subtitle {
  font-size: 1.05rem;
  color: var(--primary);
  margin: 0 0 12px;
  font-weight: 600;
}

.job-detail-list {
  margin: 0;
  padding-left: 1.25rem;
}

.job-detail-list li {
  margin-bottom: 8px;
}

.job-detail-list li:last-child {
  margin-bottom: 0;
}

.job-detail-block--note {
  margin-top: 8px;
  padding: 16px;
  background: var(--bg);
  border-radius: 8px;
}

.job-detail-note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.job-detail-footer {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.job-detail-apply-btn {
  border: none;
  cursor: pointer;
  font: inherit;
}

.job-detail-back {
  border-color: var(--border);
  color: var(--text-muted);
}

.job-detail-back:hover {
  border-color: var(--primary);
  color: var(--white);
}

.job-detail-empty {
  text-align: center;
  padding: 48px 20px 56px;
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.job-detail-empty p {
  color: var(--text-muted);
  line-height: 1.7;
}

.job-apply-dialog {
  max-width: 480px;
  width: calc(100vw - 48px);
  margin: auto;
  padding: 0;
  border: none;
  border-radius: 12px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
  color: var(--text);
}

.job-apply-dialog::backdrop {
  background: rgba(0, 0, 0, 0.45);
}

.job-apply-dialog-inner {
  padding: 28px 24px 24px;
}

.job-apply-dialog-title {
  margin: 0 0 16px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
}

.job-apply-dialog-text {
  margin: 0 0 8px;
  font-size: 0.95rem;
  line-height: 1.7;
}

.job-apply-dialog-email {
  margin: 0 0 16px;
  font-size: 1.05rem;
  font-weight: 600;
}

.job-apply-dialog-email a {
  color: var(--primary);
  text-decoration: none;
  word-break: break-all;
}

.job-apply-dialog-email a:hover {
  text-decoration: underline;
}

.job-apply-dialog-hint {
  margin: 0 0 24px;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.job-apply-dialog-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

@media (max-width: 480px) {
  .job-apply-dialog-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .job-apply-dialog-actions .btn {
    text-align: center;
  }

  .job-detail-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .job-detail-footer .btn {
    text-align: center;
  }
}