/* ============================================
   AILISON Automation Official Website Styles
   武汉爱力生自动化有限公司官网样式
   ============================================ */

/* CSS Variables */
:root {
  --primary-dark: #071a2f;
  --primary: #0b3c78;
  --primary-light: #1456a3;
  --accent: #ff6b00;
  --accent-hover: #e65f00;
  --accent-light: #fff0e6;
  --tech: #00b4d8;
  --white: #ffffff;
  --gray-50: #f7f9fc;
  --gray-100: #edf0f5;
  --gray-200: #d8dee8;
  --gray-300: #b8c1d1;
  --gray-500: #6b778c;
  --gray-700: #3d4859;
  --gray-900: #1a202c;
  --text: #2d3748;
  --text-light: #5a6578;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 8px rgba(7, 26, 47, 0.06);
  --shadow: 0 8px 30px rgba(7, 26, 47, 0.08);
  --shadow-lg: 0 20px 50px rgba(7, 26, 47, 0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 80px;
}

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

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Utility */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section-sm {
  padding: 64px 0;
}

.section-gray {
  background: var(--gray-50);
}

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

.section-header {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.section-label::before {
  content: "";
  width: 24px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-dark .section-title {
  color: var(--white);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-light);
  line-height: 1.7;
}

.section-dark .section-subtitle {
  color: rgba(255, 255, 255, 0.75);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(255, 107, 0, 0.35);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(255, 107, 0, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255, 255, 255, 0.4);
}

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

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

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

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

.btn-light:hover {
  background: var(--gray-100);
}

/* Top Bar */
.topbar {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.8125rem;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.topbar-info {
  display: flex;
  gap: 24px;
  align-items: center;
}

.topbar-info span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.topbar-actions {
  display: flex;
  gap: 20px;
  align-items: center;
}

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

.lang-switch {
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.lang-switch a {
  opacity: 0.7;
  cursor: pointer;
}

.lang-switch a.active,
.lang-switch a:hover {
  opacity: 1;
  color: var(--accent);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
  height: var(--header-height);
}

.header.scrolled {
  box-shadow: var(--shadow);
  border-bottom-color: var(--gray-100);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo img {
  height: 44px;
  width: auto;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: 0.5px;
}

.logo-name-en {
  font-size: 0.6875rem;
  color: var(--gray-500);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-menu {
  display: flex;
  gap: 32px;
}

.nav-menu a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--gray-700);
  position: relative;
  padding: 8px 0;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

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

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  gap: 12px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gray-900);
  transition: all var(--transition);
}

/* Mobile menu hidden by default on desktop */
.mobile-menu {
  display: none;
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-height) - 42px);
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--primary-dark);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(7, 26, 47, 0.92) 0%, rgba(7, 26, 47, 0.75) 55%, rgba(7, 26, 47, 0.4) 100%);
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
  padding-top: 80px;
  padding-bottom: 80px;
}

.hero-content {
  max-width: 760px;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 107, 0, 0.15);
  color: var(--accent);
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 24px;
  border: 1px solid rgba(255, 107, 0, 0.25);
}

.hero-title {
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.hero-title span {
  color: var(--accent);
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.82);
  max-width: 620px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  position: relative;
  z-index: 2;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  margin-top: -60px;
  padding: 40px 48px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  text-align: center;
  padding: 8px 0;
}

.stat-item:not(:last-child) {
  border-right: 1px solid var(--gray-100);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}

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

.stat-label {
  font-size: 0.9375rem;
  color: var(--text-light);
}

/* Cards */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.card-img {
  position: relative;
  overflow: hidden;
  height: 220px;
}

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

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

.card-body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.card-text {
  color: var(--text-light);
  font-size: 0.9375rem;
  line-height: 1.7;
  flex: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-weight: 600;
  color: var(--accent);
}

.card-link:hover {
  gap: 10px;
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

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

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

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 64px;
  align-items: center;
}

.about-img {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 480px;
}

.about-img-badge {
  position: absolute;
  bottom: 24px;
  left: 24px;
  background: var(--accent);
  color: var(--white);
  padding: 20px 28px;
  border-radius: var(--radius);
  text-align: center;
}

.about-img-badge .year {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
}

.about-img-badge .text {
  font-size: 0.875rem;
  opacity: 0.95;
}

.about-content h3 {
  font-size: 2rem;
  color: var(--gray-900);
  margin-bottom: 20px;
  line-height: 1.3;
}

.about-content p {
  color: var(--text-light);
  margin-bottom: 16px;
}

.feature-list {
  margin: 24px 0;
  display: grid;
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text);
}

.feature-list li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 10px;
  flex-shrink: 0;
}

/* Pillars / Solutions */
.pillar-card {
  position: relative;
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
  overflow: hidden;
}

.pillar-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
  transform: scaleY(0);
  transition: transform var(--transition);
}

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

.pillar-card:hover::before {
  transform: scaleY(1);
}

.pillar-icon {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.pillar-card h3 {
  font-size: 1.35rem;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.pillar-card p {
  color: var(--text-light);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.pillar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pillar-tags span {
  font-size: 0.8125rem;
  background: var(--gray-50);
  color: var(--gray-700);
  padding: 5px 12px;
  border-radius: 50px;
}

/* Industries */
.industry-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 320px;
  display: flex;
  align-items: flex-end;
  padding: 32px;
  color: var(--white);
}

.industry-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(7, 26, 47, 0.92) 0%, rgba(7, 26, 47, 0.4) 60%, transparent 100%);
  z-index: 1;
}

.industry-card-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.industry-card-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.industry-card:hover .industry-card-bg img {
  transform: scale(1.08);
}

.industry-card-content {
  position: relative;
  z-index: 2;
}

.industry-card h3 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.industry-card p {
  font-size: 0.9375rem;
  opacity: 0.9;
  margin-bottom: 16px;
}

/* Advantages */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.advantage-item {
  display: flex;
  gap: 20px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.advantage-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.15);
}

.advantage-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(255, 107, 0, 0.15);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.advantage-item h4 {
  font-size: 1.125rem;
  margin-bottom: 6px;
  color: var(--white);
}

.advantage-item p {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

/* Partners */
.partner-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.partner-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 168px;
  height: 96px;
  padding: 0 26px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 14px;
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: 0.5px;
  color: var(--gray-500);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  cursor: default;
}

.partner-logo:hover {
  border-color: var(--accent);
  color: var(--primary);
  transform: translateY(-6px) scale(1.04);
  box-shadow: var(--shadow-lg);
}

/* CTA Section */
.cta-section {
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.6;
}

.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 16px;
  color: var(--white);
}

.cta-content p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.125rem;
  margin-bottom: 32px;
}

/* Footer */
.footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 80px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 56px;
}

.footer-brand p {
  margin: 20px 0;
  font-size: 0.9375rem;
  line-height: 1.8;
}

.footer-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  font-size: 0.9375rem;
  transition: all var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.9375rem;
  align-items: flex-start;
}

.footer-contact li svg {
  flex-shrink: 0;
  color: var(--accent);
  margin-top: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
}

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

/* Page Hero (smaller) */
.page-hero {
  position: relative;
  min-height: 380px;
  display: flex;
  align-items: center;
  background: var(--primary-dark);
  overflow: hidden;
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.35;
}

.page-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7, 26, 47, 0.92) 0%, rgba(7, 26, 47, 0.7) 100%);
}

.page-hero .container {
  position: relative;
  z-index: 2;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--white);
  margin-bottom: 12px;
}

.page-hero p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.125rem;
  max-width: 600px;
}

.breadcrumb {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 16px;
}

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

/* Timeline */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--gray-200);
}

.timeline-item {
  position: relative;
  padding-bottom: 32px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-year {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}

.timeline-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 6px;
}

.timeline-text {
  color: var(--text-light);
  font-size: 0.9375rem;
}

/* Product list */
.product-category {
  margin-bottom: 64px;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--gray-100);
}

.category-header h3 {
  font-size: 1.5rem;
  color: var(--gray-900);
}

.category-header .badge {
  background: var(--accent);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 50px;
}

.product-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}

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

.product-card h4 {
  font-size: 1.0625rem;
  color: var(--gray-900);
  margin-bottom: 10px;
}

.product-card p {
  font-size: 0.875rem;
  color: var(--text-light);
  line-height: 1.65;
}

.product-card ul {
  margin-top: 14px;
}

.product-card li {
  font-size: 0.8125rem;
  color: var(--gray-700);
  padding: 4px 0;
  padding-left: 14px;
  position: relative;
}

.product-card li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* Case cards */
.case-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
}

.case-card-img {
  height: 200px;
  overflow: hidden;
}

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

.case-card-body {
  padding: 24px;
}

.case-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  padding: 4px 10px;
  border-radius: 50px;
  margin-bottom: 10px;
}

.case-card h4 {
  font-size: 1.125rem;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.case-card p {
  font-size: 0.9375rem;
  color: var(--text-light);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

.contact-info-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
  height: fit-content;
}

.contact-info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-info-item:last-child {
  margin-bottom: 0;
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-item h4 {
  font-size: 1rem;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.contact-info-item p {
  font-size: 0.9375rem;
  color: var(--text-light);
}

.contact-form {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  color: var(--text);
  transition: border-color var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

/* 表单必填星标 */
.req {
  color: var(--accent);
  margin-left: 2px;
}

/* 行内错误提示 */
.form-group.invalid input,
.form-group.invalid textarea,
.form-group.invalid select {
  border-color: #e02424;
  background: #fff5f5;
}

.form-error {
  display: none;
  color: #e02424;
  font-size: 0.8125rem;
  margin-top: 6px;
}

.form-group.invalid .form-error {
  display: block;
}

/* 表单提交状态 */
.form-status {
  display: none;
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.form-status.success {
  display: block;
  background: #eafaf1;
  color: #0a7d3c;
  border: 1px solid #b7ebc9;
}

.form-status.error {
  display: block;
  background: #fff5f5;
  color: #c0392b;
  border: 1px solid #f3c6c6;
}

.map-container {
  position: relative;
  margin-top: 64px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 420px;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
}

.map-canvas {
  width: 100%;
  height: 100%;
}

.map-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #0b3c78 0%, #071a2f 100%);
  color: #fff;
  padding: 24px;
}

.map-fallback-inner {
  max-width: 420px;
}

.map-container.has-map .map-fallback {
  display: none;
}

@media (max-width: 640px) {
  .map-container {
    height: 320px;
  }
}

/* Scroll reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Back to top */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 22px rgba(255, 107, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition);
  z-index: 999;
}

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

.back-to-top:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
}

/* Responsive */
@media (max-width: 1024px) {
  .nav-menu {
    gap: 24px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-img img {
    min-height: 320px;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 900px) {
  .nav-menu,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .mobile-menu {
    position: fixed;
    top: calc(var(--header-height) + 42px);
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-100);
    box-shadow: var(--shadow-lg);
    padding: 24px;
    display: none;
    flex-direction: column;
    gap: 16px;
    z-index: 999;
  }

  .mobile-menu.open {
    display: flex;
  }

  .mobile-menu a {
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--gray-700);
    padding: 8px 0;
  }

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

  .mobile-menu .btn {
    margin-top: 8px;
  }

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

  .stat-item:nth-child(2) {
    border-right: none;
  }

  .stat-item:nth-child(1),
  .stat-item:nth-child(2) {
    border-bottom: 1px solid var(--gray-100);
    padding-bottom: 24px;
  }

  .grid-2,
  .grid-3,
  .product-list,
  .advantage-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .section {
    padding: 64px 0;
  }

  .hero-stats {
    padding: 28px 20px;
    margin-top: -40px;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .stat-item {
    border-right: none !important;
    border-bottom: 1px solid var(--gray-100);
    padding-bottom: 16px;
  }

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

  .grid-4 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .topbar .container {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 42px;
    height: 42px;
  }
}

/* ===== 留言成功特效 ===== */
.success-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(7, 26, 47, 0.55);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s ease, visibility .3s ease;
  z-index: 2000;
}
.success-overlay.show {
  opacity: 1;
  visibility: visible;
}
.success-card {
  position: relative;
  width: min(90vw, 380px);
  background: var(--white);
  border-radius: 20px;
  padding: 40px 32px 32px;
  text-align: center;
  box-shadow: 0 24px 60px rgba(7, 26, 47, 0.35);
  transform: scale(.85);
  opacity: 0;
}
.success-overlay.show .success-card {
  animation: success-pop .4s cubic-bezier(.22, 1, .36, 1) forwards;
}
@keyframes success-pop {
  to { transform: scale(1); opacity: 1; }
}
.success-icon {
  position: relative;
  width: 84px;
  height: 84px;
  margin: 0 auto 18px;
}
.success-icon svg {
  width: 84px;
  height: 84px;
  position: relative;
  z-index: 2;
}
.success-circle {
  stroke: #16a34a;
  stroke-width: 3;
  stroke-dasharray: 151;
  stroke-dashoffset: 151;
}
.success-check {
  stroke: #16a34a;
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 48;
  stroke-dashoffset: 48;
}
.success-overlay.show .success-circle {
  animation: draw-circle .6s ease-out forwards;
}
.success-overlay.show .success-check {
  animation: draw-check .45s .55s ease-out forwards;
}
@keyframes draw-circle { to { stroke-dashoffset: 0; } }
@keyframes draw-check { to { stroke-dashoffset: 0; } }
.success-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 84px;
  height: 84px;
  margin: -42px 0 0 -42px;
  border-radius: 50%;
  border: 2px solid #16a34a;
  opacity: 0;
}
.success-overlay.show .success-ring {
  animation: ring-pulse .9s .35s ease-out forwards;
}
@keyframes ring-pulse {
  0% { transform: scale(.6); opacity: .6; }
  100% { transform: scale(1.8); opacity: 0; }
}
.success-title {
  font-size: 1.4rem;
  color: var(--gray-900);
  margin-bottom: 8px;
}
.success-text {
  color: var(--text-light);
  font-size: .95rem;
  line-height: 1.6;
  margin-bottom: 24px;
}
.confetti {
  position: absolute;
  top: 42%;
  left: 50%;
  width: 9px;
  height: 14px;
  border-radius: 2px;
  opacity: 0;
  pointer-events: none;
  z-index: 3;
}
.success-overlay.show .confetti {
  animation: confetti-fly 1s ease-out forwards;
}
@keyframes confetti-fly {
  0% { opacity: 1; transform: translate(-50%, -50%) rotate(0deg) scale(1); }
  100% { opacity: 0; transform: translate(calc(-50% + var(--tx)), calc(-50% + var(--ty))) rotate(var(--r)) scale(.8); }
}