/* =============================================
   company-site / style.css
   主色调：深蓝 #1a3a5c  亮蓝 #0071bc  橙色强调 #f47920
   字体：系统默认无衬线
   ============================================= */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: #333;
  background: #fff;
  line-height: 1.7;
  font-size: 15px;
}

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

/* ---------- Variables ---------- */
:root {
  --primary:   #1a3a5c;
  --accent:    #0071bc;
  --orange:    #f47920;
  --light-bg:  #f4f7fa;
  --border:    #dde3ea;
  --radius:    6px;
  --shadow:    0 4px 18px rgba(0,0,0,.08);
  --transition: .25s ease;
}

/* ---------- Layout Helpers ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section    { padding: 72px 0; }
.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  text-align: center;
  margin-bottom: 12px;
}
.section-sub {
  text-align: center;
  color: #666;
  margin-bottom: 48px;
  font-size: .95rem;
}
.divider {
  width: 56px; height: 4px;
  background: var(--orange);
  border-radius: 2px;
  margin: 12px auto 0;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 11px 28px;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--orange);
  color: #fff;
}
.btn-primary:hover { background: #d9650d; }

.btn-outline {
  border-color: #fff;
  color: #fff;
}
.btn-outline:hover { background: rgba(255,255,255,.15); }

.btn-blue {
  background: var(--accent);
  color: #fff;
}
.btn-blue:hover { background: #005fa3; }

/* =============================================
   HEADER / NAV
   ============================================= */
#header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--primary);
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo img {
  height: 42px;
  width: auto;
  border-radius: 4px;
}
.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: .5px;
}

.nav-links {
  display: flex;
  gap: 2px;
  height: 100%;
  align-items: center;
}
.nav-links a {
  color: rgba(255,255,255,.85);
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: .88rem;
  font-weight: 500;
  transition: var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  background: rgba(255,255,255,.12);
  color: #fff;
}

/* Dropdown menu styles */
.nav-item-dropdown {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.nav-item-dropdown > a {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item-dropdown > a::after {
  content: "▼";
  font-size: .6rem;
  margin-left: 4px;
  opacity: .7;
  transition: transform var(--transition);
}

.nav-item-dropdown:hover > a::after {
  transform: rotate(180deg);
}

.nav-item-dropdown > a::after {
  content: "▼";
  font-size: .6rem;
  margin-left: 4px;
  opacity: .7;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background: var(--primary);
  box-shadow: 0 8px 24px rgba(0,0,0,.2);
  border-radius: var(--radius);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all .25s ease;
  z-index: 100;
}

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

.dropdown-menu li {
  margin: 0;
}

.dropdown-menu a {
  display: block;
  padding: 10px 20px;
  color: rgba(255,255,255,.85);
  font-size: .88rem;
  font-weight: 500;
  transition: all .25s ease;
}

.dropdown-menu a:hover {
  background: rgba(255,255,255,.12);
  color: #fff;
  padding-left: 24px;
}

.dropdown-menu a.active {
  background: rgba(255,255,255,.15);
  color: #fff;
  font-weight: 600;
}

/* Mobile dropdown styles */
.mobile-dropdown {
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.mobile-dropdown-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  color: rgba(255,255,255,.85);
  font-size: .95rem;
  font-weight: 500;
}

.mobile-dropdown-toggle .dropdown-arrow {
  font-size: .7rem;
  opacity: .7;
  transition: transform .25s ease;
}

.mobile-dropdown-toggle.active .dropdown-arrow {
  transform: rotate(180deg);
}

.mobile-dropdown-menu {
  display: none;
  padding-left: 20px;
  margin-top: 8px;
  border-top: 1px solid rgba(255,255,255,.08);
}

.mobile-dropdown-menu.show {
  display: block;
}

.mobile-dropdown-menu li {
  list-style: none;
}

.mobile-dropdown-menu a {
  display: block;
  padding: 10px 0;
  color: rgba(255,255,255,.75);
  font-size: .88rem;
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.mobile-dropdown-menu a:last-child {
  border-bottom: none;
}

.mobile-dropdown-menu a:hover {
  color: #fff;
}

.mobile-dropdown-menu a.active {
  color: var(--orange);
  font-weight: 600;
}

/* hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  width: 24px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

/* mobile nav */
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--primary);
  padding: 12px 24px 20px;
  border-top: 1px solid rgba(255,255,255,.1);
}
.mobile-nav a {
  color: rgba(255,255,255,.85);
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
  font-size: .95rem;
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav.open { display: flex; }

/* =============================================
   BANNER / HERO
   ============================================= */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--primary) 0%, #0d6694 100%);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  object-fit: cover;
  width: 100%; height: 100%;
  opacity: .22;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 660px;
}
.hero-tag {
  display: inline-block;
  background: var(--orange);
  color: #fff;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 3px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero p {
  color: rgba(255,255,255,.82);
  font-size: 1.1rem;
  margin-bottom: 36px;
  max-width: 520px;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

/* =============================================
   STATS BAR
   ============================================= */
.stats-bar {
  background: var(--accent);
  padding: 28px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  border-right: 1px solid rgba(255,255,255,.2);
  padding: 8px 0;
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}
.stat-label {
  color: rgba(255,255,255,.75);
  font-size: .82rem;
  margin-top: 6px;
}

/* =============================================
   PRODUCT CARDS
   ============================================= */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.product-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  -webkit-transform: translateY(-5px);
  transform: translateY(-5px);
  box-shadow: 0 12px 32px rgba(0,0,0,.13);
}

.product-card .thumb {
  position: relative;
  height: 210px;
  background: var(--light-bg);
  overflow: hidden;
}
.product-card .thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.product-card:hover .thumb img {
  -webkit-transform: scale(1.06);
  transform: scale(1.06);
}

.product-card .badge {
  position: absolute;
  top: 12px; left: 12px;
  background: var(--orange);
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 3px;
  letter-spacing: .5px;
}

.product-card .card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.product-card p {
  color: #666;
  font-size: .88rem;
  flex: 1;
  margin-bottom: 16px;
}
.product-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--accent);
  font-size: .88rem;
  font-weight: 600;
  transition: gap var(--transition);
}
.product-card .card-link:hover { gap: 9px; }

/* =============================================
   INTRO 4-COLUMN BLOCKS - 悬浮文字布局
   ============================================= */
.intro-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}
.intro-block {
  border-radius: 10px;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  -webkit-background-size: cover;
  background-size: cover;
  background-position: center;
  transition: transform var(--transition), box-shadow var(--transition);
  width: 100%;
}
.intro-block:hover {
  -webkit-transform: translateY(-4px);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,.2);
}

/* 悬浮内容层 - 文字覆盖在图片上方 */
.intro-block__content {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 28px 22px;
}

.intro-block .intro-icon {
  width: 52px; height: 52px;
  background: rgba(255,255,255,.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.intro-block h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.intro-block p {
  font-size: .85rem;
  color: rgba(255,255,255,.85);
  line-height: 1.7;
  flex: 1;
}
.intro-block .intro-link {
  margin-top: 14px;
  font-size: .85rem;
  font-weight: 600;
  color: #fff;
  text-decoration: none;
  transition: opacity var(--transition);
}
.intro-block .intro-link:hover { opacity: .75; }

/* =============================================
   FEATURES / WHY US
   ============================================= */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.feature-item {
  background: var(--light-bg);
  border-radius: 10px;
  padding: 32px 24px;
  text-align: center;
  transition: box-shadow var(--transition);
}
.feature-item:hover { box-shadow: var(--shadow); }
.feature-icon {
  width: 60px; height: 60px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  font-size: 1.6rem;
}
.feature-item h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.feature-item p { color: #666; font-size: .88rem; }

/* =============================================
   CTA BAND
   ============================================= */
.cta-band {
  background: linear-gradient(135deg, var(--primary), #0d6694);
  padding: 64px 0;
  text-align: center;
}
.cta-band h2 { color: #fff; font-size: 1.9rem; margin-bottom: 14px; }
.cta-band p  { color: rgba(255,255,255,.8); margin-bottom: 32px; }

/* =============================================
   PRODUCTS PAGE
   ============================================= */
.page-hero {
  background: linear-gradient(135deg, var(--primary) 0%, #0d6694 100%);
  padding: 56px 0;
  text-align: center;
}
.page-hero h1 { color: #fff; font-size: 2.2rem; font-weight: 800; }
.page-hero p  { color: rgba(255,255,255,.75); margin-top: 10px; }

.category-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 48px;
}
.tab-btn {
  padding: 9px 22px;
  border-radius: 99px;
  border: 2px solid var(--border);
  background: #fff;
  color: #555;
  font-size: .88rem;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}
.tab-btn:hover, .tab-btn.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

/* =============================================
   PRODUCT DETAIL PAGE
   ============================================= */
.detail-hero {
  background: var(--light-bg);
  padding: 56px 0;
}
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.detail-img-wrap {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: #fff;
}
.detail-img-wrap img { width: 100%; }

.detail-info .category-tag {
  display: inline-block;
  background: rgba(0,113,188,.1);
  color: var(--accent);
  font-size: .78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 3px;
  letter-spacing: .5px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.detail-info h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 16px;
}
.detail-info .lead {
  color: #555;
  font-size: 1rem;
  margin-bottom: 28px;
  border-left: 3px solid var(--orange);
  padding-left: 14px;
}
.spec-table { width: 100%; border-collapse: collapse; margin-bottom: 28px; }
.spec-table th,
.spec-table td {
  text-align: left;
  padding: 10px 14px;
  font-size: .88rem;
  border: 1px solid var(--border);
}
.spec-table th { background: var(--light-bg); color: var(--primary); font-weight: 600; width: 38%; }

.detail-features { margin-bottom: 28px; }
.detail-features h3 { font-size: 1rem; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 8px;
  font-size: .9rem;
  color: #444;
}
.feature-list li::before {
  content: "✓";
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* =============================================
   ABOUT PAGE
   ============================================= */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-intro img { border-radius: 12px; box-shadow: var(--shadow); }
.about-intro h2 { font-size: 1.8rem; font-weight: 800; color: var(--primary); margin-bottom: 18px; }
.about-intro p { color: #555; margin-bottom: 14px; }

.timeline { max-width: 700px; margin: 0 auto; position: relative; }
.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 2px;
  background: var(--border);
  transform: translateX(-50%);
}
.tl-item {
  display: flex;
  gap: 24px;
  margin-bottom: 36px;
  position: relative;
}
.tl-item:nth-child(even) { flex-direction: row-reverse; }
.tl-year {
  width: 80px;
  flex-shrink: 0;
  text-align: center;
  font-weight: 800;
  color: var(--accent);
  padding-top: 6px;
}
.tl-dot {
  position: absolute;
  left: 50%;
  top: 10px;
  width: 14px; height: 14px;
  background: var(--orange);
  border-radius: 50%;
  transform: translateX(-50%);
  z-index: 1;
}
.tl-content {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow);
  flex: 1;
}
.tl-content h4 { color: var(--primary); font-weight: 700; margin-bottom: 4px; }
.tl-content p  { color: #666; font-size: .88rem; }

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 28px;
}
.team-card {
  text-align: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px 20px;
  box-shadow: var(--shadow);
}
.team-card .avatar {
  width: 80px; height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 14px;
  border: 3px solid var(--accent);
  background: var(--light-bg);
}
.team-card h4 { font-weight: 700; color: var(--primary); }
.team-card span { font-size: .82rem; color: #888; }

/* =============================================
   CONTACT PAGE
   ============================================= */
.contact-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 48px; }

.contact-info h2 { font-size: 1.6rem; font-weight: 800; color: var(--primary); margin-bottom: 20px; }
.contact-item {
  display: flex;
  gap: 14px;
  margin-bottom: 24px;
  align-items: flex-start;
}
.contact-icon {
  width: 44px; height: 44px;
  background: rgba(0,113,188,.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-item h4 { font-size: .88rem; font-weight: 700; color: var(--primary); margin-bottom: 2px; }
.contact-item p  { color: #555; font-size: .9rem; }

.contact-form { background: var(--light-bg); border-radius: 12px; padding: 36px; }
.contact-form h3 { font-size: 1.3rem; font-weight: 700; color: var(--primary); margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; color: #444; margin-bottom: 6px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .9rem;
  font-family: inherit;
  background: #fff;
  transition: border-color var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent); }
.form-group textarea { resize: vertical; min-height: 110px; }

/* map placeholder */
.map-placeholder {
  height: 300px;
  background: var(--light-bg);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: .9rem;
  border: 1px dashed var(--border);
  margin-top: 36px;
  flex-direction: column;
  gap: 8px;
}
.map-placeholder svg { opacity: .35; }

/* =============================================
   FOOTER
   ============================================= */
#footer {
  background: #111c2b;
  color: rgba(255,255,255,.65);
  padding-top: 60px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .logo-text { color: #fff; font-size: 1.1rem; }
.footer-brand p { margin-top: 14px; font-size: .85rem; line-height: 1.8; }

.footer-col h5 {
  color: #fff;
  font-size: .9rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: .5px;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  color: rgba(255,255,255,.6);
  font-size: .85rem;
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: #fff; }

.footer-contact li {
  display: flex;
  gap: 8px;
  font-size: .85rem;
  margin-bottom: 10px;
  align-items: flex-start;
}
.footer-contact .icon { color: var(--orange); flex-shrink: 0; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 18px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .8rem;
}
.footer-bottom a { color: rgba(255,255,255,.5); margin-left: 16px; }
.footer-bottom a:hover { color: #fff; }

/* =============================================
   BREADCRUMB
   ============================================= */
.breadcrumb {
  padding: 14px 0;
  font-size: .82rem;
  color: #888;
}
.breadcrumb a { color: var(--accent); }
.breadcrumb span { margin: 0 6px; }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .detail-grid,
  .about-intro,
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid  { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .hero h1         { font-size: 2rem; }
  .stats-grid      { grid-template-columns: 1fr 1fr; }
  .intro-grid      { grid-template-columns: 1fr 1fr; }
  .stat-item       { border-right: none; border-bottom: 1px solid rgba(255,255,255,.2); }
  .stat-item:nth-child(2n) { border-right: none; }
  .stat-item:last-child    { border-bottom: none; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .form-row  { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section   { padding: 48px 0; }
  .timeline::before { left: 16px; }
  .tl-item, .tl-item:nth-child(even) { flex-direction: row; }
  .tl-year { width: 48px; font-size: .8rem; }
  .tl-dot  { left: 16px; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.6rem; }
  .section-title { font-size: 1.5rem; }
  .hero-btns { flex-direction: column; }
  .intro-grid { grid-template-columns: 1fr; }
}

/* =============================================
   MISC: Scroll-to-top button
   ============================================= */
#scrollTop {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 44px; height: 44px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.1rem;
  box-shadow: 0 4px 14px rgba(0,0,0,.2);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
  z-index: 999;
}
#scrollTop.visible { opacity: 1; pointer-events: auto; }
#scrollTop:hover { background: #005fa3; }

/* =============================================
   HERO CAROUSEL - 图片轮播
   ============================================= */
.hero-carousel {
  position: relative;
  min-height: 560px;
  overflow: hidden;
}

.carousel-slides {
  position: relative;
  width: 100%;
  height: 560px;
}

.carousel-slide {
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  opacity: 0;
  transition: opacity .6s ease;
}

.carousel-slide.active {
  opacity: 1;
}

.carousel-slide .container {
  position: relative;
  z-index: 1;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  background: rgba(255,255,255,.15);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 1.4rem;
  cursor: pointer;
  transition: background var(--transition);
  z-index: 10;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

.carousel-btn:hover {
  background: rgba(255,255,255,.3);
}

.carousel-prev { left: 20px; }
.carousel-next { right: 20px; }

.carousel-indicators {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.carousel-indicators span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,.4);
  cursor: pointer;
  transition: all .3s ease;
}

.carousel-indicators span.active,
.carousel-indicators span:hover {
  background: #fff;
  -webkit-transform: scale(1.2);
  transform: scale(1.2);
}

/* 轮播箭头按钮样式调整 */
.hero-carousel .hero-content {
  position: relative;
  z-index: 1;
  max-width: 660px;
}

.hero-carousel .hero-tag {
  display: inline-block;
  background: var(--orange);
  color: #fff;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 3px;
  margin-bottom: 20px;
}

.hero-carousel .hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero-carousel .hero p {
  color: rgba(255,255,255,.82);
  font-size: 1.1rem;
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-carousel .hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

@media (max-width: 768px) {
  .hero-carousel { min-height: 480px; }
  .carousel-slides { height: 480px; }
  .hero-carousel .hero h1 { font-size: 2rem; }
  .carousel-btn { width: 40px; height: 40px; font-size: 1.1rem; }
  .carousel-prev { left: 10px; }
  .carousel-next { right: 10px; }
}

/* =============================================
   SECTION EYEBROW
   ============================================= */
.section-eyebrow {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 8px;
}

/* =============================================
   HERO CAROUSEL — content layout
   ============================================= */
.hero-carousel .hero-content {
  max-width: 700px;
  padding: 0;
  color: #fff;
}
.hero-carousel .hero-content h1 {
  font-size: 2.8rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 18px;
}
.hero-carousel .hero-content p {
  font-size: 1.05rem;
  color: rgba(255,255,255,.85);
  margin-bottom: 32px;
  max-width: 560px;
}
.hero-carousel .hero-tag {
  display: inline-block;
  background: var(--orange);
  color: #fff;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 3px;
  margin-bottom: 20px;
}
.hero-carousel .hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

/* =============================================
   ABOUT HOME — NEW split layout
   ============================================= */
.about-section { background: #fff; }

.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto;
  gap: 0;
  min-height: 520px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,.10);
  width: 100%;
}

.about-split-img {
  position: relative;
  overflow: hidden;
}
.about-split-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .5s ease;
}
.about-split-img:hover img {
  -webkit-transform: scale(1.03);
  transform: scale(1.03);
}

.about-split-badge {
  position: absolute;
  bottom: 24px;
  right: 24px;
  background: var(--orange);
  color: #fff;
  border-radius: 12px;
  padding: 16px 20px;
  text-align: center;
  box-shadow: 0 8px 24px rgba(244,121,32,.40);
}
.about-split-badge .badge-num {
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1;
}
.about-split-badge .badge-num small {
  font-size: 1rem;
  font-weight: 700;
}
.about-split-badge .badge-label {
  display: block;
  font-size: .75rem;
  margin-top: 4px;
  opacity: .9;
  white-space: nowrap;
}

.about-split-text {
  padding: 48px 52px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: #fff;
}
.about-split-text .section-eyebrow { display: block; margin-bottom: 10px; }
.about-split-text h2 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 18px;
}
.about-split-text p {
  color: #555;
  margin-bottom: 12px;
  font-size: .93rem;
  line-height: 1.85;
}

.about-stats {
  display: flex;
  gap: 28px;
  margin: 24px 0 22px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.about-stat-item { text-align: center; flex: 1; }
.about-stat-num {
  display: block;
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.about-stat-num small { font-size: 1rem; font-weight: 700; }
.about-stat-label {
  display: block;
  font-size: .78rem;
  color: #888;
  margin-top: 4px;
}

/* =============================================
   CAPABILITY — CARD layout
   ============================================= */
.cap-section { background: var(--light-bg); }

.cap-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.cap-card {
  background: #fff;
  border-radius: 12px;
  padding: 32px 24px 24px;
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all .3s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,.06);
  position: relative;
  overflow: hidden;
}
.cap-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  -webkit-transform: scaleX(0);
  transform: scaleX(0);
  transition: transform .3s ease;
}
.cap-card:hover,
.cap-card.active {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(0,113,188,.18);
  border-color: rgba(0,113,188,.15);
}
.cap-card:hover::before,
.cap-card.active::before { transform: scaleX(1); }

.cap-card-icon {
  width: 64px; height: 64px;
  background: linear-gradient(135deg, rgba(0,113,188,.08) 0%, rgba(26,58,92,.08) 100%);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  font-size: 1.8rem;
  transition: background .3s ease;
}
.cap-card:hover .cap-card-icon,
.cap-card.active .cap-card-icon {
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
}
.cap-card:hover .cap-card-icon { filter: none; }

.cap-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.cap-card p {
  color: #666;
  font-size: .85rem;
  line-height: 1.7;
  margin-bottom: 16px;
}
.cap-card-link {
  font-size: .82rem;
  font-weight: 600;
  color: var(--accent);
  opacity: 0;
  -webkit-transform: translateY(4px);
  transform: translateY(4px);
  transition: all .25s ease;
  display: inline-block;
}
.cap-card:hover .cap-card-link,
.cap-card.active .cap-card-link {
  opacity: 1;
  -webkit-transform: translateY(0);
  transform: translateY(0);
}

/* 详情展开面板 */
.cap-detail-panel {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,0,0,.12);
  background: #fff;
}
.cap-detail-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 340px;
}
.cap-detail-img {
  -webkit-background-size: cover;
  background-size: cover;
  background-position: center;
  min-height: 280px;
  height: 100%;
}
.cap-detail-text {
  padding: 40px 44px;
  background: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.cap-detail-text h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 14px;
}
.cap-detail-text p {
  color: #555;
  font-size: .9rem;
  line-height: 1.85;
  margin-bottom: 20px;
}
.cap-feature-list {
  list-style: none;
  margin-bottom: 24px;
}
.cap-feature-list li {
  padding: 6px 0;
  font-size: .87rem;
  color: #444;
  border-bottom: 1px solid var(--light-bg);
  display: flex;
  align-items: center;
  gap: 8px;
}
.cap-feature-list li::before {
  content: "✓";
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* =============================================
   MANUFACTURING — PHOTO BG + FLOW
   ============================================= */
.mfg-section {
  background-color: var(--primary);
  color: #fff;
}

.mfg-flow {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-top: 48px;
}

.mfg-flow-item {
  flex: 1;
  text-align: center;
  position: relative;
  padding: 0 8px;
}
.mfg-flow-circle {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(244,121,32,.15);
  border: 2px solid var(--orange);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  transition: all .3s ease;
}
.mfg-flow-item:hover .mfg-flow-circle {
  background: var(--orange);
  box-shadow: 0 0 0 8px rgba(244,121,32,.20);
}
.mfg-flow-num {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
  transition: color .3s ease;
}
.mfg-flow-item:hover .mfg-flow-num { color: #fff; }

.mfg-flow-body h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.mfg-flow-body p {
  color: rgba(255,255,255,.88);
  font-size: .83rem;
  line-height: 1.75;
}

.mfg-flow-line {
  flex-shrink: 0;
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), rgba(244,121,32,.3));
  margin-top: 36px;
  position: relative;
}
.mfg-flow-line::after {
  content: '→';
  position: absolute;
  right: -2px;
  top: -12px;
  color: var(--orange);
  font-size: 1rem;
  font-weight: 700;
}

/* =============================================
   RESPONSIVE — REFINED
   ============================================= */
@media (max-width: 1024px) {
  .cap-cards { grid-template-columns: 1fr 1fr; }
  .cap-detail-inner { grid-template-columns: 1fr; }
  .cap-detail-img { min-height: 220px; }
}

@media (max-width: 768px) {
  .about-split {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .about-split-img { height: 260px; }
  .about-split-text { padding: 36px 28px; }
  .about-stats { gap: 16px; }
  .cap-cards { grid-template-columns: 1fr 1fr; }
  .cap-card { padding: 24px 16px 20px; }
  .cap-card-icon { width: 52px; height: 52px; font-size: 1.5rem; }
  .cap-detail-text { padding: 24px 20px; }
  .mfg-flow {
    flex-direction: column;
    align-items: center;
    gap: 0;
  }
  .mfg-flow-item { width: 100%; max-width: 360px; text-align: left; display: flex; gap: 20px; align-items: flex-start; padding: 0; margin-bottom: 32px; }
  .mfg-flow-circle { flex-shrink: 0; margin: 0; }
  .mfg-flow-line { display: none; }
  .hero-carousel .hero-content h1 { font-size: 2rem; }
}

@media (max-width: 480px) {
  .cap-cards { grid-template-columns: 1fr; }
  .about-stats { flex-direction: column; gap: 12px; }
  .about-stat-item { text-align: left; display: flex; align-items: baseline; gap: 10px; }
}