/* ============================================
   Exceltek International Co., Ltd.
   良特国际有限公司 - Corporate Website
   Design System: European/American Corporate Style
   Inspired by: Ford, GM, BizLink, Fortune 500
   ============================================ */

/* --- Local fonts (Inter, self-hosted for speed) --- */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../assets/fonts/inter-400-normal.woff2') format('woff2'), url('../assets/fonts/inter-400-normal.woff') format('woff');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../assets/fonts/inter-500-normal.woff2') format('woff2'), url('../assets/fonts/inter-500-normal.woff') format('woff');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../assets/fonts/inter-600-normal.woff2') format('woff2'), url('../assets/fonts/inter-600-normal.woff') format('woff');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../assets/fonts/inter-700-normal.woff2') format('woff2'), url('../assets/fonts/inter-700-normal.woff') format('woff');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url('../assets/fonts/inter-800-normal.woff2') format('woff2'), url('../assets/fonts/inter-800-normal.woff') format('woff');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 900;
  font-display: swap;
  src: url('../assets/fonts/inter-900-normal.woff2') format('woff2'), url('../assets/fonts/inter-900-normal.woff') format('woff');
}

/* --- CSS Variables / Design Tokens --- */
:root {
  /* Primary Palette */
  --color-primary: #0a1f3f;
  --color-primary-dark: #06142b;
  --color-primary-light: #1a3f6f;
  --color-accent: #0066cc;
  --color-accent-hover: #0052a3;
  --color-accent-light: #e6f0ff;
  
  /* Neutral Palette */
  --color-white: #ffffff;
  --color-off-white: #f8f9fb;
  --color-gray-50: #f5f6f8;
  --color-gray-100: #e8eaef;
  --color-gray-200: #d1d5dc;
  --color-gray-300: #b0b7c3;
  --color-gray-400: #8b95a5;
  --color-gray-500: #6b7587;
  --color-gray-600: #4a5363;
  --color-gray-700: #2d3544;
  --color-gray-800: #1a202c;
  --color-gray-900: #0d1117;
  
  /* Semantic */
  --color-success: #16a34a;
  --color-warning: #d97706;
  --color-error: #dc2626;
  
  /* Typography */
  --font-primary: 'Inter', 'Helvetica Neue', 'Segoe UI', Arial, sans-serif;
  --font-display: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;
  
  /* Layout */
  --max-width: 1280px;
  --header-height: 80px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.15);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-gray-800);
  background-color: var(--color-white);
  overflow-x: hidden;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
}

ul, ol {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-gray-900);
}

h1 { font-size: var(--text-5xl); letter-spacing: -0.02em; }
h2 { font-size: var(--text-4xl); letter-spacing: -0.01em; }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

.section-title {
  font-size: var(--text-4xl);
  font-weight: 800;
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-gray-500);
  max-width: 640px;
  margin-bottom: var(--space-3xl);
}

.text-center { text-align: center; }
.text-accent { color: var(--color-accent); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.875rem 2rem;
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-primary);
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: none;
  letter-spacing: 0.01em;
  line-height: 1;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.4);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--color-white);
  color: var(--color-white);
}

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

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

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

.btn-white:hover {
  background: var(--color-gray-50);
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: var(--text-base);
}

/* --- Header / Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  transition: all var(--transition-base);
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.logo-img {
  height: 40px;
  width: auto;
}

.logo-text {
  line-height: 1.2;
}

.logo-text small {
  display: block;
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--color-gray-500);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-500);
  cursor: pointer;
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-full);
  padding: 0.375rem 1rem;
  transition: all var(--transition-fast);
}

.lang-switch:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: all var(--transition-fast);
}

/* --- Nav Dropdown --- */
.nav-item {
  position: relative;
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  margin-top: 10px;
  transform: translateY(6px);
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-lg);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
  z-index: 1001;
}

/* hover 桥接条：填充链接与面板之间的间隙，保证悬停连续 */
.nav-dropdown::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 0;
  right: 0;
  height: 10px;
}

/* 顶部小三角 */
.nav-dropdown::after {
  content: '';
  position: absolute;
  top: -6px;
  left: 2rem;
  width: 12px;
  height: 12px;
  background: var(--color-white);
  border-top: 1px solid var(--color-gray-100);
  border-left: 1px solid var(--color-gray-100);
  transform: rotate(45deg);
}

.nav-item:hover .nav-dropdown,
/* 用 :focus-visible 而非 :focus-within —— 后者在鼠标点击后焦点残留会导致
   旧栏位不关闭、与新栏位同时展开；:focus-visible 仅键盘 Tab 触发，保留无障碍 */
.nav-link:focus-visible + .nav-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.dropdown-title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  white-space: nowrap;
}

.dropdown-text {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--color-gray-500);
  margin-bottom: var(--space-md);
}

.dropdown-cta {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: color var(--transition-fast);
}

.dropdown-cta:hover {
  color: var(--color-primary);
}

/* 产品大菜单 */
.nav-dropdown-products {
  min-width: 560px;
  padding: var(--space-md);
}

.dropdown-products-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem var(--space-sm);
}

.dropdown-product {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-600);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.dropdown-product:hover {
  background: var(--color-gray-50);
  color: var(--color-primary);
}

.dropdown-product-arrow {
  font-size: 0.75rem;
  color: var(--color-accent);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.dropdown-product:hover .dropdown-product-arrow {
  opacity: 1;
  transform: translateX(0);
}

.dropdown-all {
  display: block;
  margin-top: var(--space-sm);
  padding: 0.625rem 0.75rem;
  border-top: 1px solid var(--color-gray-100);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: color var(--transition-fast);
}

.dropdown-all:hover {
  color: var(--color-primary);
}

/* 认证列表 */
.dropdown-certs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.dropdown-cert {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-gray-600);
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-sm);
  padding: 0.375rem 0.625rem;
  text-align: center;
  white-space: nowrap;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: #0d2b4e url('../assets/images/home-hero-bg.png') center / cover no-repeat;
  /* WebP 优先（首屏 1.9MB PNG -> 140KB），不支持 image-set 的浏览器回退到上面的 PNG */
  background-image: -webkit-image-set(url('../assets/images/home-hero-bg.webp') type('image/webp'),
                                      url('../assets/images/home-hero-bg.png') type('image/png'));
  background-image: image-set(url('../assets/images/home-hero-bg.webp') type('image/webp'),
                              url('../assets/images/home-hero-bg.png') type('image/png'));
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    linear-gradient(135deg, rgba(13,43,78,0.78) 0%, rgba(15,52,96,0.62) 50%, rgba(13,43,78,0.70) 100%),
    radial-gradient(ellipse at 20% 50%, rgba(0,102,204,0.18) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0,102,204,0.12) 0%, transparent 50%);
  pointer-events: none;
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
}

.hero-particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: rgba(255,255,255,0.3);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  width: 100%;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.hero-text {
  color: var(--color-white);
}

.hero-badge {
  display: inline-block;
  padding: 0.375rem 1rem;
  background: rgba(0,102,204,0.2);
  border: 1px solid rgba(0,102,204,0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64b5f6;
  margin-bottom: var(--space-xl);
}

.hero-text h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  color: var(--color-white);
}

.hero-text h1 span {
  display: block;
  color: #64b5f6;
}

.hero-text p {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
  margin-bottom: var(--space-2xl);
  max-width: 540px;
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(30px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  width: 100%;
}

.hero-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.hero-stat {
  text-align: center;
  padding: var(--space-lg);
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.08);
}

.hero-stat-number {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: #64b5f6;
  line-height: 1;
}

.hero-stat-label {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.6);
  margin-top: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Stats Bar --- */
.stats-bar {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
  padding: var(--space-2xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.stat-item {
  text-align: center;
}

.stat-item .stat-number {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.stat-item .stat-number span {
  color: var(--color-accent);
}

.stat-item .stat-label {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-top: var(--space-xs);
}

/* --- Section Common --- */
.section {
  padding: var(--space-5xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.section-header .section-title {
  margin-bottom: var(--space-md);
}

.section-header .section-subtitle {
  margin: 0 auto;
}

.bg-light {
  background: var(--color-off-white);
}

.bg-dark {
  background: var(--color-primary);
  color: var(--color-white);
}

.bg-dark .section-title,
.bg-dark h2, .bg-dark h3 {
  color: var(--color-white);
}

.bg-dark .section-subtitle,
.bg-dark p {
  color: rgba(255,255,255,0.7);
}

/* --- Industry Cards --- */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-lg);
}

.industry-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  border: 1px solid var(--color-gray-100);
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.industry-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.industry-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.industry-card:hover::before {
  transform: scaleX(1);
}

.industry-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: var(--radius-lg);
  font-size: 1.75rem;
  color: var(--color-accent);
}

.industry-card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  display: block;
}

.industry-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-sm);
  color: var(--color-gray-900);
}

.industry-card p {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: 1.6;
}

.industry-card-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-md);
  color: var(--color-accent);
  font-weight: 600;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  transition: color var(--transition-fast);
}

.industry-card-cta::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.industry-card:hover .industry-card-cta::after {
  transform: translateX(4px);
}

/* --- Capability Cards --- */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.capability-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  border: 1px solid var(--color-gray-100);
  transition: all var(--transition-base);
}

.capability-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: transparent;
  transform: translateY(-4px);
}

/* 背景图模式（研发中心设备卡等） */
.capability-card--bg {
  position: relative;
  overflow: hidden;
  min-height: 280px;
  display: flex;
  align-items: flex-end;
  border: none;
  padding: 0;
  background: none;
}

.capability-card--bg:hover .capability-bg-img {
  transform: scale(1.06);
}

.capability-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  transition: transform 0.6s ease;
}

.capability-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.78) 0%, rgba(0, 0, 0, 0.42) 55%, rgba(0, 0, 0, 0.12) 100%);
  z-index: 1;
}

.capability-content {
  position: relative;
  z-index: 2;
  padding: var(--space-2xl);
}

.capability-icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.capability-card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  display: block;
}

.capability-card h3 {
  margin-bottom: var(--space-sm);
  color: var(--color-heading);
  text-shadow: none;
}

.capability-card--bg h3 {
  color: var(--color-white);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

.capability-card p {
  color: var(--color-gray-500);
  font-size: var(--text-sm);
  line-height: 1.7;
  text-shadow: none;
}

.capability-card--bg p {
  color: rgba(255, 255, 255, 0.86);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

/* --- Product Cards --- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.product-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-gray-100);
  transition: all var(--transition-base);
}

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

.product-image {
  height: 220px;
  background: var(--color-gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--color-gray-300);
  position: relative;
  overflow: hidden;
}

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

.product-info {
  padding: var(--space-xl);
}

.product-info .product-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
}

.product-info h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-sm);
}

.product-info p {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: 1.6;
}

/* --- Why Us --- */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.why-image {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--color-gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  color: var(--color-gray-300);
}

.why-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.why-item {
  display: flex;
  gap: var(--space-md);
}

.why-item-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-accent);
}

.why-item-content h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-xs);
}

.why-item-content p {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: 1.6;
}

/* --- About Page --- */
.about-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0d2b4e 100%);
  padding: calc(var(--header-height) + var(--space-4xl)) 0 var(--space-4xl);
  text-align: center;
  color: var(--color-white);
}

.about-hero h1 {
  color: var(--color-white);
  font-size: var(--text-5xl);
  margin-bottom: var(--space-md);
}

.about-hero p {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto;
}

.about-content {
  padding: var(--space-5xl) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: start;
}

.about-text h2 {
  margin-bottom: var(--space-lg);
}

.about-text p {
  color: var(--color-gray-600);
  margin-bottom: var(--space-lg);
  line-height: 1.8;
}

.about-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.about-value {
  padding: var(--space-lg);
  background: var(--color-off-white);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent);
}

.about-value h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-xs);
}

.about-value p {
  font-size: var(--text-sm);
  margin-bottom: 0;
}

/* --- Factory Video --- */
.factory-video-section {
  background: var(--color-primary);
  position: relative;
  overflow: hidden;
}

.factory-video-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 70% 30%, rgba(0,102,204,0.18) 0%, transparent 60%);
  pointer-events: none;
}

.factory-video-section .section-header h2 {
  color: var(--color-white);
}

.factory-video-section .section-header p {
  color: rgba(255,255,255,0.7);
}

.factory-video-wrapper {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  background: #000;
  max-width: 960px;
  margin: 0 auto;
}

.factory-video {
  display: block;
  width: 100%;
  max-height: 540px;
  object-fit: cover;
}

.factory-video-badge {
  position: absolute;
  top: 20px;
  left: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(0,102,204,0.9);
  color: var(--color-white);
  border-radius: 24px;
  font-size: var(--text-sm);
  font-weight: 600;
  backdrop-filter: blur(8px);
  pointer-events: none;
  z-index: 1;
}

/* --- Factory Gallery (About) --- */
.factory-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.factory-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow-md);
}

.factory-item-large {
  grid-column: 1 / -1;
  aspect-ratio: 21 / 9;
}

.factory-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease;
}

.factory-item:hover img {
  transform: scale(1.05);
}

.factory-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--space-xl);
  background: linear-gradient(to top, rgba(10,31,63,0.85), transparent);
  color: var(--color-white);
}

.factory-caption h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-xs);
  color: var(--color-white);
}

.factory-caption p {
  font-size: var(--text-sm);
  margin-bottom: 0;
  color: rgba(255,255,255,0.85);
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding: var(--space-2xl) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-gray-200);
  transform: translateX(-50%);
}

.timeline-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  position: relative;
}

.timeline-item:nth-child(even) {
  direction: rtl;
}

.timeline-item:nth-child(even) .timeline-content {
  direction: ltr;
}

.timeline-year {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-accent);
  text-align: right;
}

.timeline-item:nth-child(even) .timeline-year {
  text-align: left;
}

.timeline-content {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.timeline-content h3 {
  margin-bottom: var(--space-xs);
}

.timeline-content p {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.timeline-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.timeline-points li {
  position: relative;
  padding-left: 18px;
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: 1.65;
}

.timeline-points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.6;
}

/* --- Contact Page --- */
.contact-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0d2b4e 100%);
  padding: calc(var(--header-height) + var(--space-4xl)) 0 var(--space-4xl);
  text-align: center;
  color: var(--color-white);
}

.contact-hero h1 {
  color: var(--color-white);
  font-size: var(--text-5xl);
  margin-bottom: var(--space-md);
}

.contact-hero p {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-lg);
}

.contact-section {
  padding: var(--space-5xl) 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-4xl);
}

.contact-info h2 {
  margin-bottom: var(--space-lg);
}

.contact-info > p {
  color: var(--color-gray-500);
  margin-bottom: var(--space-2xl);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.contact-detail {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.contact-detail-icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-detail h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-xs);
}

.contact-detail p {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.contact-form-wrapper {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);
}

.contact-form-wrapper h3 {
  margin-bottom: var(--space-xl);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--space-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: var(--text-base);
  font-family: var(--font-primary);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-gray-800);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0,102,204,0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

/* --- CTA Section --- */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0d2b4e 100%);
  padding: var(--space-5xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,102,204,0.2) 0%, transparent 60%);
}

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

.cta-content h2 {
  color: var(--color-white);
  font-size: var(--text-4xl);
  margin-bottom: var(--space-md);
}

.cta-content p {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
}

/* --- Footer --- */
.footer {
  background: var(--color-gray-900);
  color: rgba(255,255,255,0.6);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand p {
  font-size: var(--text-sm);
  margin-top: var(--space-md);
  line-height: 1.7;
}

.footer-brand .logo {
  color: var(--color-white);
}

.footer h4 {
  color: var(--color-white);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-lg);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-sm);
}

.footer-design {
  margin-left: var(--space-lg);
  color: rgba(255,255,255,0.45);
  white-space: nowrap;
}

/* --- Breadcrumb --- */
.breadcrumb {
  padding: calc(var(--header-height) + var(--space-lg)) 0 var(--space-lg);
  background: var(--color-off-white);
}

.breadcrumb-inner {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.breadcrumb-inner a {
  color: var(--color-gray-500);
}

.breadcrumb-inner a:hover {
  color: var(--color-accent);
}

.breadcrumb-separator {
  color: var(--color-gray-300);
}

/* --- Page Transition --- */
.page-section {
  display: none;
}

.page-section.active {
  display: block;
}

/* --- Legal pages (Privacy Policy / Terms of Service) --- */
/* Bilingual block toggle: synced with <body> lang class set in main.js */
.i18n-zh { display: none; }
.i18n-en { display: block; }
body.lang-zh .i18n-zh { display: block; }
body.lang-zh .i18n-en { display: none; }

.legal-updated {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-sm);
  margin-top: var(--space-sm);
}

.legal-content {
  max-width: 860px;
  margin: 0 auto;
}

.legal-content h2 {
  font-size: var(--text-xl);
  margin: var(--space-2xl) 0 var(--space-md);
  color: var(--color-primary);
  line-height: 1.4;
}

.legal-content h2:first-of-type {
  margin-top: var(--space-lg);
}

.legal-content p {
  margin: 0 0 var(--space-md);
  line-height: 1.85;
  color: var(--color-gray-700);
}

.legal-content ul {
  margin: 0 0 var(--space-md) var(--space-xl);
  padding: 0;
}

.legal-content li {
  margin: 0 0 var(--space-sm);
  line-height: 1.8;
  color: var(--color-gray-700);
}

.legal-content strong {
  color: var(--color-primary);
  font-weight: 600;
}

.legal-disclaimer {
  margin-top: var(--space-2xl);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-gray-100);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  font-size: 1.25rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* --- World Map (Contact) --- */
.worldmap-block { margin-bottom: var(--space-2xl); }
.worldmap-header { text-align: center; margin-bottom: var(--space-lg); }
.worldmap-header h3 {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin: 0 0 var(--space-xs);
}
.worldmap-header p {
  font-size: var(--text-base);
  color: var(--color-gray-500);
  margin: 0;
}
.worldmap-container {
  position: relative;
  width: 100%;
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-md) var(--space-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.worldmap-container svg { display: block; width: 100%; height: auto; }
.wm-dot { fill: #c5d1e0; }
.wm-dash { fill: #94a9c2; }
.mm-dot { fill: var(--color-primary); }
.mm-pulse {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 2;
  opacity: 0;
  animation: wm-pulse 2.6s ease-out infinite;
}
.mm-hit { fill: transparent; cursor: pointer; }
.mm-g { cursor: pointer; }
.mm-badge-bg {
  fill: var(--color-primary);
  opacity: 0.92;
}
.mm-badge-tx {
  fill: var(--color-white);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-anchor: middle;
  font-family: var(--font-family-base, sans-serif);
}
.mm-tip { opacity: 0; transition: opacity var(--transition-base); pointer-events: none; }
.mm-tip-tx {
  fill: var(--color-gray-800);
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-family-base, sans-serif);
}
.mm-g:hover .mm-tip { opacity: 1; }
.mm-g:hover .mm-dot { fill: var(--color-primary-dark, #1a5fd0); }
.office-card--flash {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
@keyframes wm-pulse {
  0% { r: 5; opacity: 0.75; }
  100% { r: 20; opacity: 0; }
}
@media (max-width: 640px) {
  .mm-badge-bg { height: 14px; }
  .mm-badge-tx { font-size: 10px; }
  .worldmap-container { padding: var(--space-md) var(--space-xs); }
}

/* --- Locations Grid --- */
.locations-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.location-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  overflow: hidden;
}

.location-card .team-card-img {
  width: 100%;
  height: 168px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin: calc(var(--space-xl) * -1) 0 var(--space-md);
  display: block;
}

.location-card h4 {
  margin-bottom: var(--space-xs);
}

.location-card p {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

/* --- Global Locations: photo background cards (About page) --- */
.location-card--photo {
  position: relative;
  min-height: 280px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  color: #fff;
  text-align: left;
  background-color: #1a2433;
  background-image: var(--photo-bg, none);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: flex-end;
  box-shadow: 0 4px 18px rgba(15, 23, 42, 0.10);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.location-card--photo::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(15,23,42,0.00) 0%, rgba(15,23,42,0.10) 40%, rgba(15,23,42,0.52) 100%);
  transition: background 0.35s ease;
  pointer-events: none;
}
.location-card--photo:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.18);
}
.location-card--photo:hover::before {
  background: linear-gradient(180deg, rgba(15,23,42,0.0) 0%, rgba(15,23,42,0.30) 40%, rgba(15,23,42,0.85) 100%);
}
.location-card--photo .loc-photo-body {
  position: relative;
  z-index: 1;
  padding: var(--space-lg) var(--space-xl);
  width: 100%;
}
.location-card--photo h4 {
  color: #fff;
  margin: 0 0 var(--space-xs);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: 0.01em;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.35);
}
.location-card--photo .loc-region {
  display: inline-block;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.88);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.30);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: var(--space-sm);
  backdrop-filter: blur(6px);
}
.location-card--photo p {
  color: rgba(255, 255, 255, 0.92);
  font-size: var(--text-sm);
  line-height: 1.55;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.30);
  margin: 0;
}
@media (max-width: 900px) {
  .locations-grid { grid-template-columns: repeat(2, 1fr); }
  .location-card--photo { min-height: 240px; }
}
@media (max-width: 560px) {
  .locations-grid { grid-template-columns: 1fr; }
  .location-card--photo { min-height: 220px; }
}

/* --- Global Offices (Contact) --- */
.offices-section {
  padding: var(--space-3xl) 0;
  background: var(--color-gray-50);
  border-top: 1px solid var(--color-gray-100);
}

.offices-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.office-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

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

.office-card-head {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.office-badge {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-xs);
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.office-name {
  font-size: var(--text-lg);
  line-height: 1.35;
  color: var(--color-gray-900);
  margin: 0;
}

.office-meta {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.office-meta li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-gray-600);
  word-break: break-word;
}

.om-icon {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-primary);
  opacity: 0.75;
}

.office-meta a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
  word-break: break-all;
}

.office-meta a:hover {
  text-decoration: underline;
}

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

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

/* --- Product Poster Cards (Home) --- */
.product-posters-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.product-poster {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.product-poster:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.product-poster img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-poster:hover img {
  transform: scale(1.05);
}

.product-poster-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,31,63,0.92) 0%, rgba(10,31,63,0.4) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-2xl);
  color: var(--color-white);
}

.product-poster-tag {
  display: inline-block;
  align-self: flex-start;
  padding: 0.25rem 0.75rem;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.product-poster-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--space-xs);
}

.product-poster-desc {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.8);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  max-width: 420px;
}

.product-poster-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: #64b5f6;
  font-weight: 600;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  transition: color var(--transition-fast);
}

.product-poster-link::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.product-poster:hover .product-poster-link::after {
  transform: translateX(4px);
}

/* --- Product Detail Page --- */
.product-detail-hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: flex-end;
  padding: calc(var(--header-height) + var(--space-4xl)) 0 var(--space-4xl);
  background-size: cover;
  background-position: center;
}

.product-detail-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(10,31,63,0.95) 0%, rgba(10,31,63,0.7) 50%, rgba(10,31,63,0.3) 100%);
}

.product-detail-hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  width: 100%;
  color: var(--color-white);
}

.product-detail-hero-content h1 {
  color: var(--color-white);
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  margin-bottom: var(--space-md);
}

.product-detail-hero-content p {
  color: rgba(255,255,255,0.75);
  font-size: var(--text-lg);
  max-width: 640px;
  line-height: 1.7;
}

.product-detail-section {
  padding: var(--space-5xl) 0;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-4xl);
  align-items: start;
}

/* AI Server overview topology — enlarge for label legibility (source is 1920px, downscaled display stays sharp) */
.product-detail-grid--topology {
  grid-template-columns: 1fr;
}
.product-detail-grid--topology .product-detail-intro {
  max-width: 880px;
}
.product-detail-grid--topology .product-detail-image-card {
  max-width: 1080px;
  margin: var(--space-2xl) 0 0;
  border-radius: var(--radius-xl);
}

.product-detail-intro h2 {
  margin-bottom: var(--space-lg);
  color: var(--color-primary);
}

.product-detail-intro p {
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.product-detail-image-card {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

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

/* --- Specs Table --- */
.specs-section {
  background: var(--color-off-white);
}

.specs-table-wrap {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray-100);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
}

.specs-table th,
.specs-table td {
  padding: 1rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid var(--color-gray-100);
}

.specs-table th {
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.specs-table tr:last-child td {
  border-bottom: none;
}

.specs-table td {
  font-size: var(--text-sm);
  color: var(--color-gray-700);
}

.specs-table td:first-child {
  font-weight: 600;
  color: var(--color-primary);
  width: 35%;
}

/* --- Application Scenes --- */
.application-scenes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.application-scene {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-gray-100);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.application-scene:hover {
  box-shadow: var(--shadow-lg);
}

.application-scene-image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.application-scene-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.application-scene:hover .application-scene-image img {
  transform: scale(1.03);
}

.application-scene-content {
  padding: var(--space-xl);
}

.application-scene-content h4 {
  margin-bottom: var(--space-xs);
  color: var(--color-primary);
}

.application-scene-content p {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: 1.6;
}

/* --- Product Categories --- */
.categories-section {
  background: var(--color-gray-50);
  position: relative;
}

.categories-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.82);
  z-index: 0;
}

.categories-section .container {
  position: relative;
  z-index: 1;
}

/* 分类背景同样走 WebP 优先 + PNG 回退 */
.categories-section--ai {
  background: #eef5fa url('../assets/images/category-ai-bg.png') center / cover no-repeat;
  background-image: -webkit-image-set(url('../assets/images/category-ai-bg.webp') type('image/webp'),
                                      url('../assets/images/category-ai-bg.png') type('image/png'));
  background-image: image-set(url('../assets/images/category-ai-bg.webp') type('image/webp'),
                              url('../assets/images/category-ai-bg.png') type('image/png'));
}

.categories-section--industrial {
  background: #f2f5f7 url('../assets/images/category-industrial-bg.png') center / cover no-repeat;
  background-image: -webkit-image-set(url('../assets/images/category-industrial-bg.webp') type('image/webp'),
                                      url('../assets/images/category-industrial-bg.png') type('image/png'));
  background-image: image-set(url('../assets/images/category-industrial-bg.webp') type('image/webp'),
                              url('../assets/images/category-industrial-bg.png') type('image/png'));
}

.categories-section--medical {
  background: #f0f7fa url('../assets/images/category-medical-bg.png') center / cover no-repeat;
  background-image: -webkit-image-set(url('../assets/images/category-medical-bg.webp') type('image/webp'),
                                      url('../assets/images/category-medical-bg.png') type('image/png'));
  background-image: image-set(url('../assets/images/category-medical-bg.webp') type('image/webp'),
                              url('../assets/images/category-medical-bg.png') type('image/png'));
}

.categories-section--antenna {
  background: #eef4f8 url('../assets/images/category-antenna-bg.png') center / cover no-repeat;
  background-image: -webkit-image-set(url('../assets/images/category-antenna-bg.webp') type('image/webp'),
                                      url('../assets/images/category-antenna-bg.png') type('image/png'));
  background-image: image-set(url('../assets/images/category-antenna-bg.webp') type('image/webp'),
                              url('../assets/images/category-antenna-bg.png') type('image/png'));
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-lg);
}

.category-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

.category-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent-light);
}

.category-card h4 {
  color: var(--color-primary);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.category-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.category-card li {
  position: relative;
  padding-left: 16px;
  color: var(--color-gray-500);
  font-size: var(--text-sm);
  line-height: 2;
}

.category-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* --- Medical Three-Level Categories --- */
.med-cat-block {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: 0 1px 3px rgba(10, 31, 63, 0.05);
}

.med-cat-block + .med-cat-block {
  margin-top: var(--space-lg);
}

.med-cat-head {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  padding-bottom: var(--space-lg);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-gray-100);
}

.med-cat-no {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.med-cat-title h3 {
  color: var(--color-primary);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.med-cat-title p {
  margin: 0;
  color: var(--color-gray-500);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.med-sub-grid {
  display: grid;
  gap: var(--space-md);
}

.med-sub-grid--3 { grid-template-columns: repeat(3, 1fr); }
.med-sub-grid--4 { grid-template-columns: repeat(4, 1fr); }
.med-sub-grid--6 { grid-template-columns: repeat(3, 1fr); }

.med-sub-card {
  background: #f7fafd;
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

.med-sub-card:hover {
  background: var(--color-white);
  border-color: var(--color-accent-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.med-sub-card-head {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  min-height: 30px;
}

.med-sub-letter {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  margin-top: 1px;
  padding: 0 4px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1;
}

.med-sub-card-head h4 {
  color: var(--color-primary);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1.4;
  margin: 0;
}

.med-scene-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: var(--space-xs);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.med-scene-label::before {
  content: '';
  width: 14px;
  height: 2px;
  border-radius: 1px;
  background: var(--color-accent);
}

.med-sub-card p {
  margin: 0;
  color: var(--color-gray-500);
  font-size: var(--text-sm);
  line-height: 1.75;
}

/* --- Sub-card with product photo (AI server category sub-items) --- */
.med-sub-card--photo {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.med-sub-card-media {
  flex: 0 0 auto;
  aspect-ratio: 16 / 10;
  background: #f7fafd;
  overflow: hidden;
}

.med-sub-card-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.med-sub-card-body {
  flex: 1 1 auto;
  padding: var(--space-lg);
}

/* Leak Detection sub-grid: photo card kept clearly smaller than the category
   feature image (primary/secondary hierarchy), text card takes remaining width */
.med-sub-grid--leak {
  grid-template-columns: 340px 1fr;
  gap: var(--space-lg);
}

/* text-only card next to the photo card: centre content so the stretched
   row height does not leave a large empty area */
.med-sub-grid--leak > .med-sub-card:not(.med-sub-card--photo) {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Medical sub-grid that mixes a photo card with text-only cards (Vital Sign
   Monitoring Cables). The text cards stretch to the photo card's height, so
   centre their content instead of leaving a large empty area at the bottom. */
.med-sub-grid--mixed > .med-sub-card:not(.med-sub-card--photo) {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

@media (max-width: 860px) {
  .med-sub-grid--leak { grid-template-columns: 1fr; }
  .med-sub-grid--leak .med-sub-card-media { max-width: 440px; margin-inline: auto; }
}

@media (max-width: 1024px) {
  .med-sub-grid--3,
  .med-sub-grid--4,
  .med-sub-grid--6 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .med-cat-block { padding: var(--space-lg); }
  .med-sub-grid--3,
  .med-sub-grid--4,
  .med-sub-grid--6 { grid-template-columns: 1fr; }
}

/* --- Medical Category Teaser (first layer) --- */
.med-cat-teaser-section {
  background: var(--color-gray-50);
}

.med-cat-teaser-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.med-cat-teaser-card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(10, 31, 63, 0.05);
  text-decoration: none;
  transition: all var(--transition-base);
}

.med-cat-teaser-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent-light);
}

.med-cat-teaser-image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-gray-100);
}

.med-cat-teaser-image img,
.med-cat-teaser-image picture {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.med-cat-teaser-content {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.med-cat-teaser-content h3 {
  color: var(--color-primary);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.med-cat-teaser-content p {
  color: var(--color-gray-500);
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-bottom: var(--space-md);
  flex: 1;
}

.med-cat-teaser-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 600;
}

.med-cat-teaser-link::after {
  content: '→';
  transition: transform var(--transition-base);
}

.med-cat-teaser-card:hover .med-cat-teaser-link::after {
  transform: translateX(4px);
}

/* --- Medical Category Feature Block (second layer) --- */
.med-cat-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  margin-bottom: var(--space-xl);
}

.med-cat-feature-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-gray-100);
  aspect-ratio: 16 / 10;
}

.med-cat-feature-image img,
.med-cat-feature-image picture {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.med-cat-feature-content .med-cat-head {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

@media (max-width: 1024px) {
  .med-cat-teaser-grid { grid-template-columns: 1fr; }
  .med-cat-feature { grid-template-columns: 1fr; }
  .med-cat-feature-image { order: -1; }
}

@media (max-width: 640px) {
  .med-cat-teaser-image { aspect-ratio: 16 / 9; }
  .med-cat-feature-image { aspect-ratio: 16 / 9; }
}

/* --- Quality & Certifications Page --- */
.quality-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0d2b4e 100%);
  padding: calc(var(--header-height) + var(--space-4xl)) 0 var(--space-4xl);
  text-align: center;
  color: var(--color-white);
}

.quality-hero h1 {
  color: var(--color-white);
  font-size: var(--text-5xl);
  margin-bottom: var(--space-md);
}

.quality-hero p {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-lg);
  max-width: 700px;
  margin: 0 auto;
}

.quality-commitment {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.quality-commitment-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.quality-commitment-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.quality-commitment-content h2 {
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

.quality-commitment-content p {
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.quality-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.quality-step {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  position: relative;
}

.quality-step::after {
  content: '→';
  position: absolute;
  right: -1.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-accent);
  font-size: var(--text-xl);
  font-weight: 700;
}

.quality-step:last-child::after {
  display: none;
}

.quality-step-number {
  width: 48px;
  height: 48px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  margin: 0 auto var(--space-md);
}

.quality-step h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-xs);
  color: var(--color-primary);
}

.quality-step p {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: 1.5;
}

/* Photo variant for quality control process steps (visual language matches .location-card--photo) */
.quality-step--photo {
  background-color: #1a2433;
  background-image: none;
  color: #fff;
  border: 0;
  text-align: left;
  min-height: 264px;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  overflow: hidden;
  box-shadow: 0 4px 18px rgba(15, 23, 42, 0.10);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.quality-step__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.quality-step--photo::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.04) 0%, rgba(15, 23, 42, 0.20) 45%, rgba(15, 23, 42, 0.74) 100%);
  transition: background 0.35s ease;
  pointer-events: none;
}
.quality-step--photo:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.18);
}
.quality-step--photo:hover::before {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.10) 0%, rgba(15, 23, 42, 0.40) 45%, rgba(15, 23, 42, 0.86) 100%);
}
.quality-step__body {
  position: relative;
  z-index: 2;
  width: 100%;
  padding: var(--space-lg) var(--space-xl) var(--space-xl);
}
.quality-step--photo .quality-step-number {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.38);
  backdrop-filter: blur(6px);
  margin: 0 0 var(--space-sm);
}
.quality-step--photo h4 {
  color: #fff;
  font-size: var(--text-xl);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.35);
  margin: 0 0 var(--space-xs);
}
.quality-step--photo p {
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.30);
  margin: 0;
  line-height: 1.55;
}
.quality-step--photo::after {
  color: #fff;
  z-index: 3;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.45);
}

/* --- Certifications --- */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.certification-card {
  position: relative;
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.certification-card__bg {
  display: block;
  width: 100%;
  aspect-ratio: 5 / 7;
  object-fit: contain;
  background: #eef1f5;
  z-index: 0;
}

.certification-card::after {
  display: none;
}

.certification-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.certification-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 3;
  width: 62px;
  height: 62px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border: 2px solid rgba(0,102,204,0.1);
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

/* Badge-only strip (homepage quality area): keep cards from collapsing,
   center the badge since there is no certificate image behind it. */
.certifications-grid--badges .certification-card {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 150px;
  padding: var(--space-md);
}

.certifications-grid--badges .certification-badge {
  position: static;
  margin: 0;
}

/* --- Breadcrumb Dark --- */
.breadcrumb-dark {
  background: rgba(255,255,255,0.08);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.breadcrumb-dark .breadcrumb-inner {
  color: rgba(255,255,255,0.6);
}

.breadcrumb-dark .breadcrumb-inner a {
  color: rgba(255,255,255,0.6);
}

.breadcrumb-dark .breadcrumb-inner a:hover {
  color: var(--color-white);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  :root {
    --header-height: 72px;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }
  
  .hero-visual {
    display: none;
  }
  
  .industries-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .capabilities-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .why-grid {
    grid-template-columns: 1fr;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
  }

  .factory-gallery {
    grid-template-columns: repeat(2, 1fr);
  }

  .factory-item-large {
    aspect-ratio: 16 / 9;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .locations-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .timeline::before {
    left: 20px;
  }
  
  .timeline-item,
  .timeline-item:nth-child(even) {
    grid-template-columns: 1fr;
    direction: ltr;
    padding-left: 50px;
  }
  
  .timeline-year,
  .timeline-item:nth-child(even) .timeline-year {
    text-align: left;
  }
  
  .product-posters-grid,
  .application-scenes-grid,
  .quality-commitment,
  .product-detail-grid {
    grid-template-columns: 1fr;
  }
  
  .quality-flow {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .quality-step::after {
    display: none;
  }
  
  .certifications-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
  }
  
  .nav-dropdown {
    display: none;
  }
  
  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    padding: var(--space-xl);
    border-bottom: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-lg);
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .hero-text h1 {
    font-size: var(--text-3xl);
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .hero-buttons .btn {
    width: 100%;
  }
  
  .industries-grid {
    grid-template-columns: 1fr;
  }
  
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }
  
  .section-title {
    font-size: var(--text-3xl);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  
  .about-values {
    grid-template-columns: 1fr;
  }

  .factory-gallery {
    grid-template-columns: 1fr;
  }

  .factory-item-large {
    aspect-ratio: 4 / 3;
  }

  .footer-design {
    margin-left: 0;
  }
  
  .locations-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-stat-number {
    font-size: var(--text-2xl);
  }
  
  .quality-flow,
  .certifications-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .hero {
    min-height: auto;
    padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-3xl);
  }
  
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .stat-item .stat-number {
    font-size: var(--text-2xl);
  }
}

/* ============================================
   Dynamic Elements (Designed by Allen Fang · Rev.01.1)
   ============================================ */

/* --- 1. Page Transition Mask (bold curtain reveal) --- */
.page-transition {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #081a33 0%, #0d2a5e 45%, #1565C0 100%);
  transform: translateY(101%);
  transition: transform 0.42s cubic-bezier(0.77, 0, 0.175, 1);
  pointer-events: none;
}

.page-transition::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 130%, rgba(255,255,255,0.16) 0%, transparent 55%);
}

.page-transition::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: -35%;
  width: 35%;
  background: linear-gradient(105deg, transparent, rgba(255,255,255,0.10), transparent);
  transform: skewX(-18deg);
  opacity: 0;
}

.page-transition.show {
  transform: translateY(0);
}

.page-transition.show::after {
  opacity: 1;
  animation: ptSweep 0.75s ease 0.05s;
}

.page-transition.hide {
  transform: translateY(-101%);
}

.pt-label {
  position: relative;
  font-family: var(--font-primary);
  font-size: clamp(1.8rem, 5vw, 4rem);
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  opacity: 0;
  transform: scale(0.92);
  white-space: nowrap;
}

.page-transition.show .pt-label {
  animation: ptLabelIn 0.5s cubic-bezier(0.2, 0.8, 0.2, 1) 0.1s forwards;
}

@keyframes ptLabelIn {
  0%   { opacity: 0; transform: scale(0.92); letter-spacing: 0.38em; }
  55%  { opacity: 1; }
  100% { opacity: 1; transform: scale(1); letter-spacing: 0.14em; }
}

@keyframes ptSweep {
  from { left: -35%; }
  to   { left: 110%; }
}

/* Old page fade-out while mask covers */
.page-section.pt-leaving {
  animation: ptLeaving 0.3s ease forwards;
}

@keyframes ptLeaving {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-16px); }
}

/* --- 2. Navigation dynamics --- */
.header.scrolled {
  height: 64px;
  box-shadow: 0 4px 28px rgba(8, 26, 51, 0.12);
  border-bottom-color: rgba(21, 101, 192, 0.18);
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--color-accent), #4fc3f7);
  box-shadow: 0 0 8px rgba(0, 102, 204, 0.6);
  transition: width 0.12s linear;
  z-index: 1002;
}

.nav-link {
  transition: color var(--transition-fast), transform var(--transition-fast), text-shadow var(--transition-fast);
}

.nav-link::after {
  background: linear-gradient(90deg, var(--color-accent), #4fc3f7);
  box-shadow: 0 0 10px rgba(0, 102, 204, 0.55);
}

.nav-link:hover,
.nav-link.active {
  transform: translateY(-1px);
  text-shadow: 0 2px 12px rgba(0, 102, 204, 0.20);
}

.nav-link.active::before {
  content: '';
  position: absolute;
  top: -7px;
  left: 50%;
  transform: translateX(-50%);
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
}

/* Logo subtle hover */
.logo:hover #logo-icon {
  transform: rotate(-4deg) scale(1.04);
}

#logo-icon {
  display: inline-flex;
  transition: transform var(--transition-fast);
}

/* Primary button shine sweep */
.btn-primary {
  position: relative;
  overflow: hidden;
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -80%;
  width: 50%;
  height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255,255,255,0.35), transparent);
  transform: skewX(-20deg);
  transition: left 0.5s ease;
}

.btn-primary:hover::after {
  left: 140%;
}

/* Back to top pop-in + hover lift */
.back-to-top.visible {
  animation: backTopIn 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.back-to-top:hover {
  transform: translateY(-3px) scale(1.06);
  box-shadow: 0 10px 28px rgba(0, 102, 204, 0.45);
}

@keyframes backTopIn {
  from { opacity: 0; transform: translateY(20px) scale(0.8); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* --- 3. Page enter sequences (hero, bold) --- */
.page-section.active .hero h1 span {
  display: inline-block;
}

.page-section.active .hero-badge {
  animation: heroFadeUp 0.65s cubic-bezier(0.2, 0.8, 0.2, 1) 0.05s both;
}

.page-section.active .hero h1 span {
  animation: heroFadeUp 0.75s cubic-bezier(0.2, 0.8, 0.2, 1) 0.18s both;
}

.page-section.active .hero h1 span:nth-of-type(2) {
  animation-delay: 0.3s;
}

.page-section.active .hero .hero-text > p {
  animation: heroFadeUp 0.75s cubic-bezier(0.2, 0.8, 0.2, 1) 0.42s both;
}

.page-section.active .hero .hero-buttons {
  animation: heroFadeUp 0.75s cubic-bezier(0.2, 0.8, 0.2, 1) 0.54s both;
}

.page-section.active .hero .hero-card {
  animation: heroCardIn 0.9s cubic-bezier(0.2, 0.8, 0.2, 1) 0.5s both;
}

@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(26px); filter: blur(5px); }
  to   { opacity: 1; transform: translateY(0); filter: blur(0); }
}

@keyframes heroCardIn {
  from { opacity: 0; transform: translateY(46px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* --- 4. Mobile hamburger animation --- */
.mobile-menu-btn span {
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-menu-btn.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.open span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav.open .nav-link {
  animation: navLinkIn 0.45s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.nav.open .nav-link:nth-child(1) { animation-delay: 0.04s; }
.nav.open .nav-link:nth-child(2) { animation-delay: 0.09s; }
.nav.open .nav-link:nth-child(3) { animation-delay: 0.14s; }
.nav.open .nav-link:nth-child(4) { animation-delay: 0.19s; }
.nav.open .nav-link:nth-child(5) { animation-delay: 0.24s; }
.nav.open .nav-link:nth-child(6) { animation-delay: 0.29s; }

@keyframes navLinkIn {
  from { opacity: 0; transform: translateX(16px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ============================================
   Industry Harness Solutions — Three.js WebGL 3D
   Isometric smart city / industrial park scene
   ============================================ */

.harness-section {
  background: #f7f8fa;
  overflow: hidden;
  position: relative;
}

.harness-section .section-title {
  color: var(--color-text);
}

.harness-section .section-subtitle {
  color: var(--color-text-muted);
}

.harness-3d-wrap {
  position: relative;
  width: 100%;
  max-width: 1244px;
  height: auto;
  aspect-ratio: 16 / 9;
  margin: var(--space-xl) auto 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #ffffff;
}

.harness-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: var(--radius-lg);
}

/* Feather the scene edges so it blends softly into the white background */
.harness-3d-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: var(--radius-lg);
  background: radial-gradient(ellipse at center, transparent 55%, rgba(255, 255, 255, 0.85) 85%, rgba(255, 255, 255, 0.98) 100%);
  z-index: 2;
}

.harness-labels {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}

.harness-label {
  position: absolute;
  display: flex;
  flex-direction: row;
  align-items: center;
  transform: translate(-50%, -50%);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: auto;
  cursor: pointer;
  max-width: 280px;
  text-align: left;
  gap: 8px;
  text-decoration: none;
}

.harness-label:hover {
  transform: translate(-50%, -50%) scale(1.04);
}

.harness-label-icon {
  position: relative;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(0, 102, 204, 0.22);
  border-radius: 50%;
  color: #0066cc;
  transition: all 0.3s ease;
  box-shadow: 0 4px 14px rgba(0, 40, 80, 0.1);
}

.harness-label-icon::after {
  content: '';
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 1px solid rgba(0, 102, 204, 0.22);
  animation: harness-pulse 2.2s ease-out infinite;
}

@keyframes harness-pulse {
  0% { transform: scale(1); opacity: 0.55; }
  100% { transform: scale(1.7); opacity: 0; }
}

.harness-label:hover .harness-label-icon,
.harness-label.active .harness-label-icon {
  background: #0066cc;
  border-color: #0066cc;
  color: #fff;
  transform: scale(1.1);
  box-shadow: 0 6px 22px rgba(0, 102, 204, 0.3);
}

.harness-label-icon svg {
  width: 20px;
  height: 20px;
}

.harness-label-text {
  display: none;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.92);
  padding: 5px 10px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 30, 60, 0.08);
  backdrop-filter: blur(4px);
  max-width: 240px;
}

.harness-label-title {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: #1a2a3a;
  line-height: 1.3;
  white-space: nowrap;
}

.harness-label-desc {
  display: block;
  font-size: var(--text-xs);
  color: #566676;
  line-height: 1.35;
  max-width: 200px;
  margin-top: 2px;
}

.harness-label:hover .harness-label-text,
.harness-label.active .harness-label-text {
  display: flex;
}

.harness-label.active .harness-label-text {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 4px 16px rgba(0, 102, 204, 0.12);
}

/* Detail panel (right side, like reference site) */
.harness-detail-panel {
  position: absolute;
  top: 50%;
  right: 24px;
  width: 320px;
  max-width: calc(100% - 48px);
  transform: translateY(-50%) translateX(120%);
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(0, 40, 80, 0.08);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 20px 50px rgba(0, 20, 50, 0.12);
  z-index: 10;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  backdrop-filter: blur(10px);
}

.harness-detail-panel.open {
  transform: translateY(-50%) translateX(0);
  opacity: 1;
  pointer-events: auto;
}

.harness-detail-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #f1f5f9;
  color: #64748b;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

.harness-detail-close:hover {
  background: #e2e8f0;
  color: #334155;
}

.harness-detail-close svg {
  width: 14px;
  height: 14px;
}

.harness-detail-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #0066cc;
  background: rgba(0, 102, 204, 0.08);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.harness-detail-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
  line-height: 1.25;
}

.harness-detail-desc {
  font-size: 0.95rem;
  color: #475569;
  line-height: 1.65;
  margin-bottom: 18px;
}

.harness-detail-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.harness-detail-list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9rem;
  color: #475569;
  margin-bottom: 8px;
  line-height: 1.5;
}

.harness-detail-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #0066cc;
}

.harness-detail-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 0.9rem;
  font-weight: 600;
  color: #0066cc;
  text-decoration: none;
  transition: gap 0.2s ease;
}

.harness-detail-link:hover {
  gap: 10px;
}

.harness-detail-link svg {
  width: 16px;
  height: 16px;
}

.harness-hub-label {
  position: absolute;
  display: none;
  flex-direction: column;
  align-items: center;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 4;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(0.7rem, 1.5vw, 0.9rem);
  letter-spacing: 0.08em;
  color: #1a2a3a;
  text-align: center;
  line-height: 1.3;
}

.harness-hub-label small {
  display: block;
  font-weight: 500;
  font-size: 0.65em;
  letter-spacing: 0.05em;
  opacity: 0.6;
  margin-top: 2px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .harness-3d-wrap {
    max-width: 100%;
    border-radius: 0;
  }

  .harness-detail-panel {
    right: 12px;
    width: 280px;
    padding: 18px;
  }

  .harness-label-icon {
    width: 32px;
    height: 32px;
  }

  .harness-label-icon svg {
    width: 16px;
    height: 16px;
  }

  .harness-label-text {
    padding: 4px 8px;
  }

  .harness-label-title {
    font-size: 0.72rem;
  }

  .harness-label-desc {
    display: none;
  }

  .harness-label {
    max-width: 150px;
  }

  .harness-hub-label {
    font-size: 0.65rem;
  }
}

@media (max-width: 480px) {
  .harness-3d-wrap {
    border-radius: 0;
  }

  .harness-detail-panel {
    top: auto;
    bottom: 12px;
    right: 12px;
    left: 12px;
    width: auto;
    transform: translateY(120%);
    max-height: 55%;
    overflow-y: auto;
  }

  .harness-detail-panel.open {
    transform: translateY(0);
  }

  .harness-label {
    gap: 4px;
  }

  .harness-label-icon {
    width: 28px;
    height: 28px;
  }

  .harness-label-icon svg {
    width: 14px;
    height: 14px;
  }

  .harness-label-text {
    display: none;
  }

  .harness-label:hover .harness-label-text,
  .harness-label.active .harness-label-text {
    display: flex;
    padding: 3px 6px;
  }

  .harness-label-title {
    font-size: 0.62rem;
  }
}


/* --- 5. Reduced motion accessibility --- */
@media (prefers-reduced-motion: reduce) {
  .page-transition,
  .pt-label,
  .page-section *,
  .hero *,
  .back-to-top {
    animation: none !important;
    transition: none !important;
  }

  .page-transition {
    display: none;
  }
}

/* ===== Two-layer category pages: shared variants (2026-08-27) ===== */
.categories-section--auto {
  background: #f2f7f4;
}

.categories-section--ems {
  background: #f5f4f8;
}

.med-cat-teaser-grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.med-sub-grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 1024px) {
  .med-cat-teaser-grid--2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .med-sub-grid--2 {
    grid-template-columns: 1fr;
  }
}

/* Deep-link scroll target: keep block below fixed header */
.med-cat-block { scroll-margin-top: 96px; }

/* --- Admin-authored custom text blocks (SiteBridge.applyCustomBlocks) ---
   Mount points live at the end of every .page-section:
     <div class="custom-blocks" data-custom-blocks="<pageKey>"></div>
   Empty containers must not add any spacing to the page. */
.custom-blocks:empty {
  display: none;
}
.custom-blocks {
  max-width: var(--container-width, 1200px);
  margin: 0 auto;
  padding: 0 var(--space-lg, 24px);
}
.custom-block {
  margin: var(--space-xl, 40px) 0;
  padding: var(--space-lg, 28px) var(--space-xl, 36px);
  background: var(--color-white, #fff);
  border-left: 4px solid var(--color-accent, #0066cc);
  border-radius: 10px;
  box-shadow: 0 2px 14px rgba(10, 31, 63, 0.07);
}
.custom-block-title {
  margin: 0 0 var(--space-md, 16px);
  font-size: clamp(1.25rem, 2.4vw, 1.6rem);
  font-weight: 700;
  color: var(--color-primary, #0a1f3f);
  line-height: 1.35;
}
.custom-block-body {
  font-size: var(--text-base, 1rem);
  line-height: 1.85;
  color: var(--color-gray-700, #4a5568);
  white-space: normal;
}
@media (max-width: 768px) {
  .custom-block { padding: var(--space-md, 18px) var(--space-lg, 22px); }
}