/* ===================================================
   北京邦宁智科生物技术有限公司 - 官网样式
   配色方案：专业蓝 #1B7AC8 + 生物科技绿 #2AAD72
   设计风格：干净、明亮、专业、可信赖的生物科技企业
   =================================================== */

:root {
  /* ---- 品牌色（自然生物绿 + 专业蓝）---- */
  --brand-blue: #1B7AC8;
  --brand-blue-dark: #1569AD;
  --brand-blue-light: #E8F4FD;
  --brand-blue-subtle: rgba(27, 122, 200, 0.06);

  --brand-green: #2AAD72;
  --brand-green-dark: #1C8052;
  --brand-green-mid: #208A5A;
  --brand-green-soft: #3DBC87;
  --brand-green-light: #E6F5EE;
  --brand-green-subtle: rgba(42, 173, 114, 0.06);
  --brand-green-glow: rgba(42, 173, 114, 0.16);
  --brand-green-glow-strong: rgba(42, 173, 114, 0.30);

  /* ---- 中性色 ---- */
  --text-primary: #0B1120;
  --text-secondary: #4A5568;
  --text-muted: #718096;
  --text-on-dark: #FFFFFF;
  --bg-white: #FFFFFF;
  --bg-page: #F2F5F8;
  --bg-dark: #08101C;
  --bg-dark-card: #0E1A2B;
  --border-light: #E2E8F0;
  --border-focus: var(--brand-green);

  /* ---- Hero 浅色背景 ---- */
  --hero-bg-start: #FFFFFF;
  --hero-bg-mid: #F5F9FC;
  --hero-bg-end: #EBF3FA;

  /* ---- 功能色 ---- */
  --danger: #E53935;
  --warning: #F59E0B;

  /* ---- 阴影系统 ---- */
  --shadow-sm: 0 1px 3px rgba(11,17,32,0.06), 0 1px 2px rgba(11,17,32,0.04);
  --shadow-md: 0 4px 16px rgba(11,17,32,0.08);
  --shadow-lg: 0 12px 40px rgba(11,17,32,0.12);
  --shadow-xl: 0 20px 60px rgba(11,17,32,0.15);
  --shadow-blue: 0 8px 28px rgba(27,122,200,0.18);
  --shadow-green: 0 6px 20px rgba(42,173,114,0.15);
  --shadow-green-lg: 0 10px 32px rgba(42,173,114,0.22);
  --shadow-green-glow: 0 0 14px rgba(42,173,114,0.18);

  /* ---- 圆角 & 过渡 ---- */
  --radius-sm: 10px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

/* ---- Typography ---- */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.3; color: var(--text-primary); }
h1 { font-size: clamp(2rem, 5vw, 3.4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.1rem, 2vw, 1.35rem); }

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--brand-green-light);
  border: 1px solid rgba(42,173,114,0.20);
  color: var(--brand-green-mid);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-title {
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  line-height: 1.75;
}

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ================================
   BUTTONS
================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
  font-family: inherit;
}

.btn-primary {
  background: var(--brand-green);
  color: #fff;
  box-shadow: var(--shadow-green);
  text-shadow: none;
}
.btn-primary:hover {
  background: var(--brand-green-dark);
  box-shadow: var(--shadow-green-lg);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--brand-blue);
  border: 2px solid var(--brand-blue);
}
.btn-outline:hover {
  background: var(--brand-blue);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-blue);
}

.btn-blue {
  background: var(--brand-blue);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn-blue:hover {
  background: var(--brand-blue-dark);
  box-shadow: 0 10px 36px rgba(27,122,200,0.32);
  transform: translateY(-2px);
}

/* ================================
   NAVIGATION - 统一白色磨砂玻璃
================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(255,255,255,0.95);
  box-shadow: 0 2px 16px rgba(11,17,32,0.06);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-img {
  height: 52px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.nav-logo:hover .logo-img { opacity: 0.85; transform: scale(1.02); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0;
}

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

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
  display: inline-block;
  cursor: pointer;
  transition: color 0.3s ease;
  user-select: none;
}

.nav-link:hover {
  color: var(--brand-green);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-green);
  border-radius: 1px;
  transition: width 0.3s ease;
  box-shadow: 0 0 6px rgba(42,173,114,0.3);
}

.nav-link:hover::after { width: 100%; }

/* Dropdown toggle */
.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.nav-arrow {
  font-size: 0.65rem;
  transition: transform 0.25s ease;
  display: inline-block;
  margin-left: 2px;
}

.nav-has-dropdown:hover .nav-arrow,
.nav-has-dropdown.open .nav-arrow {
  transform: rotate(180deg);
}

/* Dropdown Menu */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  min-width: 200px;
  padding: 8px 0;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
  z-index: 100;
}

.nav-has-dropdown:hover .nav-dropdown,
.nav-has-dropdown.open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(4px);
}

/* Dropdown links */
.nav-dropdown-link {
  display: block;
  padding: 10px 20px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  white-space: nowrap;
  position: relative;
}

.nav-dropdown-link:hover {
  color: var(--brand-green);
  background: var(--brand-green-subtle);
  padding-left: 25px;
}

/* Touch: active state */
.nav-has-dropdown.open .nav-dropdown {
  display: block;
}

/* Spacing between nav items */
.nav-item + .nav-item {
  margin-left: 28px;
}

.nav-cta {
  padding: 9px 22px;
  font-size: 0.9rem;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0;
  margin-right: 6px;
}

.lang-switch-btn {
  background: none;
  border: 1px solid var(--border-light);
  padding: 4px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  line-height: 1.5;
  border-radius: 6px;
}

.lang-switch-btn:first-child {
  border-radius: 6px 0 0 6px;
  border-right: none;
}

.lang-switch-btn:last-child {
  border-radius: 0 6px 6px 0;
  border-left: none;
}

.lang-switch-btn.active {
  background: var(--brand-green);
  color: #fff;
  border-color: var(--brand-green);
  box-shadow: var(--shadow-green-glow);
}

.lang-switch-btn:not(.active):hover {
  background: var(--brand-green-subtle);
  border-color: rgba(42,173,114,0.22);
  color: var(--brand-green);
}

.lang-divider {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* ================================
   HERO SECTION - 浅色明亮专业
================================= */
.hero {
  min-height: 100vh;
  background: linear-gradient(180deg, var(--hero-bg-start) 0%, var(--hero-bg-mid) 50%, var(--hero-bg-end) 100%);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 110px 0 80px;
}

/* 右上角淡蓝光晕 — 增加层次感 */
.hero::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -5%;
  width: 650px;
  height: 650px;
  background:
    radial-gradient(ellipse 70% 50% at 50% 50%, rgba(27,122,200,0.07) 0%, rgba(27,122,200,0.02) 45%, transparent 72%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}

/* 左下角淡绿光晕 — 生物科技点缀 */
.hero::after {
  content: '';
  position: absolute;
  bottom: -15%;
  left: -8%;
  width: 550px;
  height: 550px;
  background:
    radial-gradient(ellipse 60% 40% at 50% 50%, rgba(42,173,114,0.05) 0%, rgba(42,173,114,0.01) 50%, transparent 75%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--brand-green-light);
  border: 1px solid rgba(42,173,114,0.22);
  color: var(--brand-green-dark);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease both;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--brand-green);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
  box-shadow: 0 0 8px rgba(42,173,114,0.4);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px rgba(42,173,114,0.4); }
  50% { opacity: 0.7; box-shadow: 0 0 16px rgba(42,173,114,0.2), 0 0 0 8px rgba(42,173,114,0); }
}

.hero-title {
  color: var(--text-primary);
  margin-bottom: 8px;
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-title-highlight {
  background: linear-gradient(135deg, var(--brand-blue), var(--brand-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.15rem, 2.5vw, 1.65rem);
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.85;
  margin-bottom: 40px;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 48px;
  animation: fadeInUp 0.6s ease 0.5s both;
}

.stat-item {
  text-align: center;
  padding: 20px 14px;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.stat-item:hover {
  border-color: rgba(42,173,114,0.25);
  box-shadow: var(--shadow-md), 0 0 16px rgba(42,173,114,0.08);
  transform: translateY(-3px);
}

.stat-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--brand-green);
  display: block;
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* Hero Visual Card — 浅色白卡 */
.hero-visual {
  position: relative;
  animation: fadeInRight 0.8s ease 0.2s both;
}

.hero-card-main {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px 32px 20px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.hero-card-main::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-blue), var(--brand-green));
}

.hero-card-title {
  color: var(--brand-green-dark);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cell-diagram {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.cell-node {
  aspect-ratio: 1;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: var(--brand-green-light);
  border: 1.5px solid rgba(42,173,114,0.12);
  transition: var(--transition);
  animation: cellFloat 3s ease-in-out infinite;
  cursor: default;
}

.cell-node:nth-child(2) { animation-delay: 0.5s; }
.cell-node:nth-child(3) { animation-delay: 1s; }
.cell-node:nth-child(4) { animation-delay: 1.5s; }
.cell-node:nth-child(5) { animation-delay: 0.3s; }
.cell-node:nth-child(6) { animation-delay: 0.8s; }
.cell-node:nth-child(7) { animation-delay: 1.3s; }
.cell-node:nth-child(8) { animation-delay: 1.8s; }

.cell-node:hover {
  background: rgba(42,173,114,0.10);
  border-color: var(--brand-green);
  box-shadow: var(--shadow-green-glow);
  transform: scale(1.08);
}

@keyframes cellFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.hero-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.metric-item {
  background: var(--bg-page);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 14px;
  transition: var(--transition);
}

.metric-item:hover {
  border-color: rgba(42,173,114,0.18);
  background: var(--brand-green-light);
}

.metric-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  font-weight: 500;
}

.metric-val {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.metric-val span {
  color: var(--brand-green);
  font-size: 0.82rem;
  margin-left: 4px;
  font-weight: 600;
}

.hero-device-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px 0 0;
  min-height: 300px;
}

.hero-device-img {
  max-width: 100%;
  max-height: 460px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  border-radius: 8px;
  transition: transform 0.5s ease;
}

.hero-card-main:hover .hero-device-img {
  transform: scale(1.02);
}

/* ================================
   FEATURES SECTION
================================= */
.features {
  padding: 100px 0;
  background: var(--bg-white);
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-blue), var(--brand-green));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(42,173,114,0.18);
}

.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 56px;
  height: 56px;
  background: var(--brand-green-subtle);
  border: 1px solid rgba(42,173,114,0.12);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.55rem;
  margin-bottom: 22px;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--brand-blue), var(--brand-green));
  border-color: transparent;
  box-shadow: var(--shadow-green-glow);
}

.feature-card:hover .feature-icon * { filter: brightness(0) invert(1); }

.feature-card h3 {
  color: var(--text-primary);
  margin-bottom: 12px;
  font-size: 1.12rem;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.75;
}

.feature-tag {
  display: inline-block;
  background: var(--brand-green-light);
  color: var(--brand-green-mid);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 11px;
  border-radius: var(--radius-full);
  margin-top: 16px;
  border: 1px solid rgba(42,173,114,0.20);
}

/* ================================
   PRODUCTS SECTION - 深色面板
================================= */
.products {
  padding: 100px 0;
  background: var(--bg-page);
}

.products-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 72px;
  align-items: center;
}

.products-info .section-subtitle {
  margin: 0 0 36px;
  text-align: left;
}

.product-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 36px;
}

.product-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: default;
}

.product-item:hover {
  border-color: var(--brand-green);
  background: var(--brand-green-light);
  transform: translateX(4px);
  box-shadow: 0 0 18px rgba(42,173,114,0.08);
}

.product-item-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--brand-green), var(--brand-green-dark));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
  color: #fff;
  box-shadow: 0 0 12px rgba(42,173,114,0.15);
}

.product-item-info h4 {
  color: var(--text-primary);
  font-size: 1rem;
  margin-bottom: 4px;
}

.product-item-info p {
  color: var(--text-secondary);
  font-size: 0.87rem;
  line-height: 1.6;
}

.products-visual {
  position: relative;
}

.platform-box {
  background: var(--bg-dark);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(42,173,114,0.08);
}

.platform-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-green), var(--brand-blue));
  box-shadow: 0 2px 12px rgba(42,173,114,0.20);
}

.platform-box::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse at top left, rgba(42,173,114,0.04) 0%, transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(27,122,200,0.04) 0%, transparent 50%);
  pointer-events: none;
}

.platform-title {
  color: var(--brand-green);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.platform-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  z-index: 1;
}

.step-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: relative;
}

.step-row:last-child { border-bottom: none; }

.step-num {
  width: 32px;
  height: 32px;
  background: rgba(42,173,114,0.12);
  border: 1px solid rgba(42,173,114,0.18);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-green);
  font-size: 0.78rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content { flex: 1; }

.step-name {
  color: #fff;
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.step-desc {
  color: rgba(255,255,255,0.45);
  font-size: 0.78rem;
}

.step-status {
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.status-done {
  background: rgba(42,173,114,0.14);
  color: var(--brand-green);
  border: 1px solid rgba(42,173,114,0.18);
}

.status-auto {
  background: rgba(27,122,200,0.15);
  color: #6DB8F0;
  border: 1px solid rgba(27,122,200,0.18);
}

/* ================================
   AI IMAGING SECTION
================================= */
.ai-imaging {
  padding: 100px 0;
  background: var(--bg-white);
  position: relative;
}

.ai-video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.ai-video-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.ai-video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(42,173,114,0.08);
  border-color: rgba(42,173,114,0.18);
}

.ai-video-wrap {
  position: relative;
  background: #000;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.ai-video-wrap video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: #000;
}

/* Play overlay — shown only when video is paused */
.ai-video-wrap video:not(:playing) + .ai-video-play,
.ai-video-wrap video[paused] + .ai-video-play {
  display: flex;
}

.ai-video-play {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(8,16,28,0.45);
  color: #fff;
  font-size: 2.4rem;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.ai-video-card:hover .ai-video-play {
  background: rgba(8,16,28,0.55);
}

.ai-video-info {
  padding: 20px 22px;
}

.ai-video-info h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.ai-video-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ================================
   EQUIPMENT SHOWCASE SECTION
================================= */
.showcase {
  padding: 100px 0;
  background: var(--bg-white);
  position: relative;
}

.showcase-gallery {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: repeat(2, 260px);
  gap: 20px;
  max-width: 100%;
}

.showcase-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  cursor: pointer;
  margin: 0;
}

.showcase-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(42,173,114,0.08);
  border-color: rgba(42,173,114,0.18);
}

.showcase-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.showcase-item:hover img {
  transform: scale(1.04);
}

.showcase-item.large {
  grid-row: 1 / 3;
  grid-column: 1;
}

.showcase-item:nth-child(2) {
  grid-row: 1;
  grid-column: 2;
}

.showcase-item:nth-child(3) {
  grid-row: 2;
  grid-column: 2;
}

.showcase-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 20px;
  background: linear-gradient(0deg, rgba(11,17,32,0.70) 0%, rgba(11,17,32,0.20) 60%, transparent 100%);
  color: #fff;
  font-size: 0.82rem;
  line-height: 1.5;
  font-weight: 500;
  opacity: 0.95;
  transition: opacity 0.3s ease;
}

.showcase-item:hover .showcase-caption {
  opacity: 1;
  padding-bottom: 20px;
}

/* ================================
   ABOUT SECTION
================================= */
.about {
  padding: 100px 0;
  background: var(--bg-white);
  position: relative;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 72px;
  align-items: center;
}

.about-content .section-tag {
  background: var(--brand-blue-light);
  border-color: rgba(27,122,200,0.2);
  color: var(--brand-blue);
}

.about-content .section-title { color: var(--text-primary); }

.about-content .section-subtitle {
  color: var(--text-secondary);
  margin: 0 0 32px;
  text-align: left;
}

.about-vision {
  background: var(--brand-green-light);
  border: 1px solid rgba(42,173,114,0.15);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 32px;
  position: relative;
}

.about-vision::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--brand-green);
  border-radius: 4px 0 0 4px;
  box-shadow: 0 0 12px rgba(42,173,114,0.20);
}

.vision-quote {
  color: var(--text-primary);
  font-size: 1rem;
  line-height: 1.8;
  padding-left: 12px;
}

.vision-quote strong { color: var(--brand-green-mid); font-weight: 700; }

.about-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.keyword-chip {
  background: var(--bg-page);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.84rem;
  font-weight: 500;
  padding: 7px 18px;
  border-radius: var(--radius-full);
  transition: var(--transition);
  cursor: default;
}

.keyword-chip:hover {
  background: var(--brand-green-light);
  border-color: var(--brand-green);
  color: var(--brand-green-mid);
  box-shadow: 0 0 8px rgba(42,173,114,0.08);
}

.about-milestones { display: flex; flex-direction: column; gap: 0; }

.milestone {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-left: 3px solid var(--border-light);
  padding-left: 24px;
  position: relative;
  transition: var(--transition);
}

.milestone::before {
  content: '';
  position: absolute;
  left: -8.5px;
  top: 26px;
  width: 14px;
  height: 14px;
  background: var(--bg-white);
  border: 3px solid var(--brand-green);
  border-radius: 50%;
  transition: var(--transition);
  box-shadow: 0 0 6px rgba(42,173,114,0.15);
}

.milestone:hover::before {
  background: var(--brand-green);
  box-shadow: 0 0 0 4px var(--brand-green-light), 0 0 12px rgba(42,173,114,0.20);
}

.milestone:hover { border-left-color: var(--brand-green); }

.milestone-year {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--brand-green-mid);
  min-width: 52px;
  padding-top: 2px;
  letter-spacing: 0.02em;
}

.milestone-content h4 {
  color: var(--text-primary);
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.milestone-content p {
  color: var(--text-muted);
  font-size: 0.83rem;
  line-height: 1.6;
}

/* ================================
   TEAM SECTION
================================= */
.team {
  padding: 100px 0;
  background: var(--bg-page);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
  margin-top: 64px;
}

.team-photo {
  margin-top: 48px;
}

.team-photo-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  background: var(--bg-white);
}

.team-photo-wrap img {
  width: 100%;
  height: auto;
  max-height: 520px;
  object-fit: cover;
  object-position: center 20%;
  display: block;
}

.team-photo-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 14px 20px;
  background: linear-gradient(to top, rgba(0,0,0,0.65), transparent);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.team-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  text-align: center;
}

.team-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(42,173,114,0.15);
}

.team-avatar {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, #08101C, #0E1A2B);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  position: relative;
  overflow: hidden;
}

.team-avatar::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(27,122,200,0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(42,173,114,0.06) 0%, transparent 50%);
}

.team-avatar::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-green), var(--brand-blue));
  box-shadow: 0 -2px 10px rgba(42,173,114,0.15);
}

.team-avatar-emoji {
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.2));
}

.team-info {
  padding: 24px 20px 28px;
}

.team-name {
  color: var(--text-primary);
  font-size: 1.08rem;
  margin-bottom: 4px;
}

.team-position {
  color: var(--brand-green-mid);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.team-bio {
  color: var(--text-secondary);
  font-size: 0.83rem;
  line-height: 1.65;
}

/* ================================
   CERTIFICATES SECTION - 分层展示
================================= */
.certificates {
  padding: 100px 0;
  background: var(--bg-page);
  position: relative;
}

.certs-group {
  margin-bottom: 72px;
}

.certs-group:last-child {
  margin-bottom: 0;
}

.certs-group-title {
  font-size: 1.15rem;
  color: var(--text-primary);
  font-weight: 700;
  margin-bottom: 28px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.01em;
}

/* ---- 发明专利 — 大卡片展示 ---- */
.certs-invention-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.cert-invention-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}

.cert-invention-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(42, 173, 114, 0.22);
}

.cert-invention-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-blue), var(--brand-green));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.cert-invention-card:hover::before {
  opacity: 1;
}

.cert-invention-img {
  width: 100%;
  height: 300px;
  object-fit: contain;
  object-position: center;
  background: #FAFBFC;
  display: block;
  transition: transform 0.5s ease;
  padding: 8px;
}

.cert-invention-card:hover .cert-invention-img {
  transform: scale(1.02);
}

.cert-invention-title {
  padding: 14px 16px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
  line-height: 1.5;
  border-top: 1px solid var(--border-light);
  background: var(--bg-white);
}

/* ---- 企业荣誉 — 正着放大展示 ---- */
.certs-honors-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.cert-honor-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}

.cert-honor-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(42, 173, 114, 0.22);
}

.cert-honor-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-green), var(--brand-blue));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 2;
}

.cert-honor-card:hover::before {
  opacity: 1;
}

.cert-honor-img {
  width: 100%;
  aspect-ratio: 0.75;
  object-fit: contain;
  object-position: center;
  background: #FAFBFC;
  display: block;
  transition: transform 0.5s ease;
  padding: 8px;
  max-height: 440px;
}

.cert-honor-card:hover .cert-honor-img {
  transform: scale(1.02);
}

.cert-honor-title {
  padding: 14px 16px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  line-height: 1.5;
  border-top: 1px solid var(--border-light);
  text-align: center;
  background: var(--bg-white);
}

/* ---- 其他专利 — 堆叠设计 ---- */
.certs-stacks-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.certs-stack {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: default;
  position: relative;
  overflow: hidden;
}

.certs-stack:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(42, 173, 114, 0.18);
  transform: translateY(-4px);
}

.certs-stack::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-blue), var(--brand-green));
  opacity: 0.6;
  transition: opacity 0.3s ease;
}

.certs-stack:hover::before {
  opacity: 1;
}

.certs-stack-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.certs-stack-icon {
  font-size: 1.5rem;
  width: 48px;
  height: 48px;
  background: var(--brand-green-light);
  border: 1px solid rgba(42, 173, 114, 0.15);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.certs-stack-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.certs-stack-count {
  font-size: 0.8rem;
  color: var(--brand-green);
  font-weight: 600;
  margin-top: 2px;
}

.certs-stack-body {
  position: relative;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  cursor: pointer;
}

.certs-stack-img {
  position: absolute;
  width: 140px;
  height: auto;
  aspect-ratio: 0.75;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  border: 1px solid var(--border-light);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease;
  cursor: pointer;
}

.certs-stack-img:nth-child(1) {
  transform: rotate(-9deg) translateX(-60px) translateY(-4px);
  z-index: 1;
  opacity: 0.85;
}

.certs-stack-img:nth-child(2) {
  transform: rotate(-3deg) translateX(-28px) translateY(2px);
  z-index: 2;
  opacity: 0.92;
}

.certs-stack-img:nth-child(3) {
  transform: rotate(5deg) translateX(4px) translateY(-2px);
  z-index: 3;
  opacity: 1;
}

.certs-stack:hover .certs-stack-img:nth-child(1) {
  transform: rotate(-8deg) translateX(-80px) translateY(-4px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  opacity: 1;
}

.certs-stack:hover .certs-stack-img:nth-child(2) {
  transform: rotate(-2deg) translateX(-40px) translateY(2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  opacity: 1;
}

.certs-stack:hover .certs-stack-img:nth-child(3) {
  transform: rotate(4deg) translateX(20px) translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.certs-stack-btn {
  width: 100%;
  padding: 12px;
  background: var(--bg-page);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  position: relative;
  z-index: 1;
}

.certs-stack-btn:hover {
  background: var(--brand-green);
  color: #fff;
  border-color: var(--brand-green);
  box-shadow: var(--shadow-green);
  transform: translateY(-2px);
}

/* Lightbox */
.certs-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(8, 16, 28, 0.94);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.certs-lightbox.open {
  display: flex;
}

.certs-lightbox-content {
  position: relative;
  max-width: 92vw;
  max-height: 86vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.certs-lightbox-content img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(42, 173, 114, 0.10);
}

.certs-lightbox-title {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.88rem;
  margin-top: 14px;
  font-weight: 500;
  text-align: center;
}

.certs-lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  z-index: 10;
}

.certs-lightbox-close:hover {
  background: rgba(229, 57, 53, 0.2);
  border-color: rgba(229, 57, 53, 0.4);
}

.certs-lightbox-prev,
.certs-lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 50%;
  color: #fff;
  font-size: 1.3rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.certs-lightbox-prev {
  left: 24px;
}

.certs-lightbox-next {
  right: 24px;
}

.certs-lightbox-prev:hover,
.certs-lightbox-next:hover {
  background: rgba(42, 173, 114, 0.15);
  border-color: rgba(42, 173, 114, 0.30);
  color: var(--brand-green);
}

/* ================================
   CONTACT SECTION
================================= */
.contact {
  padding: 100px 0;
  background: var(--bg-white);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 72px;
  align-items: start;
}

.contact-info .section-subtitle {
  margin: 0 0 36px;
  text-align: left;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 36px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.contact-item:hover { background: var(--brand-green-light); }

.contact-icon {
  width: 48px;
  height: 48px;
  background: var(--brand-green-subtle);
  border: 1px solid rgba(42,173,114,0.12);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
  transition: var(--transition);
}

.contact-item:hover .contact-icon {
  background: rgba(42,173,114,0.10);
  border-color: rgba(42,173,114,0.22);
  box-shadow: 0 0 10px rgba(42,173,114,0.10);
}

.contact-item-text p:first-child {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-bottom: 2px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.contact-item-text p:last-child {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.93rem;
}

/* Form */
.contact-form {
  background: var(--bg-page);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-title {
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: 28px;
  font-weight: 700;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-white);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--text-primary);
  transition: var(--transition);
  font-family: inherit;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--brand-green);
  box-shadow: 0 0 0 3px var(--brand-green-subtle), 0 0 10px rgba(42,173,114,0.08);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }

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

.form-submit {
  width: 100%;
  padding: 15px;
  font-size: 1rem;
}

/* ================================
   FOOTER - 深色主题
================================= */
.footer {
  background: var(--bg-dark);
  padding: 64px 0 0;
  color: rgba(255,255,255,0.65);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(42,173,114,0.08);
}

.footer-logo-img {
  height: 58px;
  width: auto;
  filter: brightness(1.2) drop-shadow(0 0 6px rgba(42,173,114,0.25));
}

.footer-desc {
  color: rgba(255,255,255,0.45);
  font-size: 0.88rem;
  line-height: 1.75;
  margin-top: 16px;
  margin-bottom: 24px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.social-btn {
  width: 38px;
  height: 38px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(42,173,114,0.08);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: rgba(255,255,255,0.55);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.social-btn:hover {
  background: rgba(42,173,114,0.12);
  border-color: rgba(42,173,114,0.24);
  color: var(--brand-green);
  box-shadow: 0 0 10px rgba(42,173,114,0.12);
}

.footer-col h5 {
  color: #fff;
  font-size: 0.86rem;
  font-weight: 700;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-col ul { display: flex; flex-direction: column; gap: 11px; }
.footer-col a {
  color: rgba(255,255,255,0.45);
  font-size: 0.88rem;
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--brand-green);
  padding-left: 4px;
  text-shadow: 0 0 6px rgba(42,173,114,0.20);
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom p { font-size: 0.81rem; color: rgba(255,255,255,0.32); }

.icp-link {
  color: rgba(255,255,255,0.32);
  font-size: 0.81rem;
  transition: var(--transition);
}
.icp-link:hover { color: rgba(42,173,114,0.65); }

/* ================================
   ANIMATIONS
================================= */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; translate: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

.fade-in-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ================================
   RESPONSIVE
================================= */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; gap: 44px; }
  .hero-visual { max-width: 520px; margin: 0 auto; }
  .products-layout { grid-template-columns: 1fr; gap: 48px; }
  .showcase-gallery { grid-template-columns: 1fr 1fr; grid-template-rows: 320px 240px; }
  .ai-video-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-item.large { grid-row: 1; grid-column: 1 / 3; }
  .showcase-item:nth-child(2) { grid-row: 2; grid-column: 1; }
  .showcase-item:nth-child(3) { grid-row: 2; grid-column: 2; }
  .certs-invention-grid { grid-template-columns: repeat(2, 1fr); }
  .certs-honors-grid { grid-template-columns: repeat(2, 1fr); }
  .certs-stacks-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .contact-layout { grid-template-columns: 1fr; gap: 48px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }

  .nav-menu.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    padding: 16px 24px;
    gap: 0;
    border-top: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(8px);
    max-height: 80vh;
    overflow-y: auto;
  }

  /* Mobile nav items */
  .nav-item + .nav-item { margin-left: 0; }

  .nav-item {
    border-bottom: 1px solid rgba(0,0,0,0.04);
  }
  .nav-item:last-child { border-bottom: none; }

  /* Mobile: lang switcher in menu */
  .lang-switcher {
    margin: 6px 0 0;
    border-top: 1px solid rgba(0,0,0,0.04);
    padding-top: 14px;
    display: flex;
    justify-content: center;
    gap: 6px;
  }
  .lang-switch-btn {
    padding: 8px 18px;
    font-size: 0.88rem;
    border-radius: var(--radius-sm) !important;
    border: 1.5px solid var(--border-light);
  }
  .lang-switch-btn:first-child { border-radius: var(--radius-sm); border-right: 1.5px solid var(--border-light); }
  .lang-switch-btn:last-child { border-radius: var(--radius-sm); border-left: 1.5px solid var(--border-light); }

  .nav-link,
  .nav-dropdown-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 14px 0;
    font-size: 0.95rem;
    color: var(--text-primary);
  }

  .nav-link::after { display: none; }

  /* Mobile dropdown */
  .nav-dropdown {
    position: static;
    transform: none;
    background: transparent;
    border: none;
    border-radius: 0;
    box-shadow: none;
    padding: 0 0 0 16px;
    margin-bottom: 4px;
    opacity: 1;
    visibility: visible;
    display: none;
    min-width: 0;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-left: 2px solid var(--brand-green);
  }

  .nav-has-dropdown.open .nav-dropdown { display: block; }

  .nav-dropdown-link {
    padding: 10px 14px;
    font-size: 0.88rem;
    color: var(--text-secondary);
  }

  .nav-dropdown-link:hover {
    background: transparent;
    padding-left: 18px;
  }

  .showcase-gallery { grid-template-columns: 1fr; grid-template-rows: auto; }
  .ai-video-grid { grid-template-columns: 1fr; }
  .showcase-item.large { grid-row: auto; grid-column: 1; }
  .showcase-item:nth-child(2) { grid-row: auto; grid-column: 1; }
  .showcase-item:nth-child(3) { grid-row: auto; grid-column: 1; }
  .showcase-item { height: 280px; }
  .showcase-item.large { height: 360px; }
  .showcase-item:hover { transform: none; }
  .showcase-item:hover img { transform: none; }
  .certs-invention-grid { grid-template-columns: 1fr; }
  .certs-honors-grid { grid-template-columns: 1fr; }
  .certs-stacks-grid { grid-template-columns: 1fr; }
  .certs-lightbox-prev { left: 12px; width: 40px; height: 40px; }
  .certs-lightbox-next { right: 12px; width: 40px; height: 40px; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cell-diagram { grid-template-columns: repeat(4, 1fr); }
  .hero { padding: 100px 0 60px; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .hero-stats { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
  .features-grid { grid-template-columns: 1fr; }
  .certs-invention-grid { grid-template-columns: 1fr; }
  .certs-honors-grid { grid-template-columns: 1fr; }
  .certs-stacks-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .team-photo-wrap img { max-height: 360px; }
  .contact-form { padding: 24px 20px; }
  .cert-invention-img { height: 260px; }
  .cert-honor-img { max-height: 360px; }
}

/* ================================
   TOAST NOTIFICATION
================================= */
.toast {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: var(--bg-dark);
  border: 1px solid rgba(42,173,114,0.25);
  color: #fff;
  padding: 16px 24px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-xl), 0 0 18px rgba(42,173,114,0.10);
  transform: translateX(120%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast.show { transform: translateX(0); }
.toast-icon { color: var(--brand-green); font-size: 1.1rem; }

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 32px;
  left: 32px;
  width: 44px;
  height: 44px;
  background: var(--brand-green);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-green);
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.show { display: flex; }
.back-to-top:hover {
  background: var(--brand-green-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-green-lg);
}