/* ========================================
   上海小思电气 - 企业官网样式表
   品牌色：#002060 主色 / #1450B8 辅助蓝 / #E5EFFF 浅蓝背景
   字体：Inter (英文/数字) + Noto Sans SC (中文)
   ======================================== */

/* ===== Design Tokens ===== */
:root {
  /* Brand Colors */
  --color-primary: #002060;
  --color-primary-rgb: 0, 32, 96;
  --color-secondary: #1450B8;
  --color-secondary-2: #2D4DB6;
  --color-accent: #00A3F5;
  --color-accent-2: #2CBEFD;
  --color-gold: #FFC000;

  /* Background Colors */
  --color-bg-light: #E5EFFF;
  --color-bg-lighter: #F5F8FF;
  --color-bg-white: #FFFFFF;
  --color-bg-card: #FAFAFA;
  --color-bg-dark: #002060;

  /* Text Colors */
  --color-text-primary: #0A0A0A;
  --color-text-secondary: #737373;
  --color-text-tertiary: #A3A3A3;
  --color-text-on-dark: #FFFFFF;
  --color-text-on-dark-secondary: #A3A3A3;
  --color-text-footer-muted: #525252;

  /* Border / Divider */
  --color-divider: #E5E5E5;
  --color-divider-dark: #1A3A6B;

  /* Typography */
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-cn: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --container-width: 1200px;
  --page-width: 1440px;
  --section-padding-y: 80px;
  --section-padding-x: 120px;
  --card-padding: 36px;
  --card-radius: 8px;
  --btn-radius: 4px;
  --badge-radius: 20px;
  --icon-radius: 10px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;

  /* Shadows */
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 8px 24px rgba(0, 32, 96, 0.12);
}

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

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

body {
  font-family: var(--font-cn);
  color: var(--color-text-primary);
  background: var(--color-bg-white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

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

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

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

/* ===== Layout Utilities ===== */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: var(--section-padding-y) var(--section-padding-x);
}

.section--light {
  background: var(--color-bg-lighter);
}

.section--light-blue {
  background: var(--color-bg-light);
}

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

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

/* ===== Section Header ===== */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header--left {
  text-align: left;
}

.section-header h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.4;
}

.section-header p {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-top: 12px;
}

.section-header--dark h2 {
  color: var(--color-text-on-dark);
}

.section-header--dark p {
  color: var(--color-text-on-dark-secondary);
}

/* ===== Header / Navigation ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  height: 72px;
  display: flex;
  align-items: center;
}

.site-header__inner {
  width: var(--page-width);
  max-width: 100%;
  margin: 0 auto;
  padding: 0 var(--section-padding-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.site-logo {
  font-family: var(--font-cn);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.site-logo__icon {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
}

.site-logo__img {
  height: 40px;
  width: auto;
  max-width: 120px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

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

.site-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-primary);
  position: relative;
  padding: 4px 0;
}

.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-secondary);
  transition: width var(--transition-fast);
}

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

.site-nav a.active {
  color: var(--color-secondary);
  font-weight: 600;
}

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

.header-logo {
  height: 42px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

@media (max-width: 1024px) {
  .header-logo {
    height: 36px;
    max-width: 120px;
  }
}

@media (max-width: 768px) {
  .header-logo {
    display: none;
  }
  .site-logo__img {
    height: 32px;
    max-width: 90px;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 600;
  padding: 14px 30px;
  border-radius: var(--btn-radius);
  transition: all var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
}

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

.btn--primary:hover {
  background: var(--color-secondary);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 32, 96, 0.25);
}

.btn--secondary {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn--secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn--ghost:hover {
  background: var(--color-primary);
  color: #fff;
}

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

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

.btn--lg {
  font-size: 16px;
  padding: 16px 36px;
}

.btn--sm {
  font-size: 14px;
  padding: 10px 20px;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

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

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero Section ===== */
.hero {
  background: var(--color-primary);
  color: #fff;
  padding: 100px var(--section-padding-x);
  min-height: 560px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 28px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(ellipse at top right, rgba(20, 80, 184, 0.3), transparent 70%);
  pointer-events: none;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--badge-radius);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-tertiary);
  width: fit-content;
  position: relative;
  z-index: 1;
}

.hero__title {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.2;
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.hero__subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text-tertiary);
  max-width: 600px;
  position: relative;
  z-index: 1;
}

.hero__actions {
  display: flex;
  gap: 16px;
  position: relative;
  z-index: 1;
}

/* ===== Hero Carousel / Slider ===== */
.hero--slider {
  padding: 0;
  min-height: 560px;
  overflow: hidden;
}

.hero__loading {
  padding: 100px var(--section-padding-x);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 28px;
  min-height: 560px;
}

.hero__slides {
  position: relative;
  width: 100%;
  min-height: 560px;
  overflow: hidden;
}

.hero__slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  min-height: 560px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 28px;
  padding: 100px var(--section-padding-x);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.8s ease, visibility 0.8s ease;
  z-index: 0;
}

.hero__slide--active {
  opacity: 1;
  visibility: visible;
  z-index: 1;
}

/* Background image for slide */
.hero__slide--has-image {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* Dark gradient overlay when image is present */
.hero__slide--has-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0, 32, 96, 0.85) 0%, rgba(0, 32, 96, 0.5) 50%, rgba(20, 80, 184, 0.3) 100%);
  z-index: 0;
}

/* Decorative gradient for slides without image */
.hero__slide--no-image {
  background: var(--color-primary);
}

.hero__slide--no-image::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(ellipse at top right, rgba(20, 80, 184, 0.3), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* Slide content above overlay */
.hero__slide > .hero__badge,
.hero__slide > .hero__title,
.hero__slide > .hero__subtitle,
.hero__slide > .hero__actions {
  position: relative;
  z-index: 2;
}

/* Slide animation */
.hero__slide--active .hero__badge {
  animation: heroFadeIn 0.8s ease 0.1s both;
}

.hero__slide--active .hero__title {
  animation: heroFadeIn 0.8s ease 0.3s both;
}

.hero__slide--active .hero__subtitle {
  animation: heroFadeIn 0.8s ease 0.5s both;
}

.hero__slide--active .hero__actions {
  animation: heroFadeIn 0.8s ease 0.7s both;
}

@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Navigation dots */
.hero__dots {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.hero__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  padding: 0;
}

.hero__dot:hover {
  background: rgba(255, 255, 255, 0.6);
}

.hero__dot--active {
  background: #fff;
  width: 32px;
  border-radius: 5px;
}

/* Navigation arrows */
.hero__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition-base);
  backdrop-filter: blur(4px);
}

.hero__arrow:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.4);
}

.hero__arrow--prev {
  left: 24px;
}

.hero__arrow--next {
  right: 24px;
}

/* ===== Trust Bar ===== */
.trust-bar {
  padding: 40px var(--section-padding-x);
  background: var(--color-bg-white);
  border-bottom: 1px solid var(--color-divider);
}

.trust-bar__title {
  text-align: center;
  font-size: 14px;
  color: var(--color-text-tertiary);
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}

.trust-bar__logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.trust-bar__logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  opacity: 0.85;
  transition: opacity var(--transition-fast);
}

.trust-bar__logo-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-secondary);
  line-height: 1.3;
  text-align: center;
}

.trust-bar__logo-img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: 6px;
  background: #fff;
}

.trust-bar__logo-placeholder {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: #f0f4ff;
  border: 1px solid #e0e8f5;
  color: #1450b8;
  opacity: 0.6;
  transition: opacity var(--transition-fast), color var(--transition-fast);
}

.trust-bar__logo:hover {
  opacity: 1;
}

.trust-bar__logo:hover .trust-bar__logo-placeholder {
  opacity: 1;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.trust-bar__logo:hover .trust-bar__logo-name {
  color: var(--color-primary);
}

/* ===== Core Business Cards ===== */
.business-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: var(--container-width);
  margin: 0 auto;
}

.business-card {
  background: var(--color-bg-card);
  border-radius: var(--card-radius);
  padding: var(--card-padding);
  transition: all var(--transition-base);
}

.business-card:hover {
  background: #fff;
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.business-card__icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  border-radius: var(--icon-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 22px;
  margin-bottom: 20px;
}

.business-card__title {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.business-card__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ===== Featured Products ===== */
.featured-products {
  background: var(--color-bg-lighter);
}

.featured-products__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  max-width: var(--container-width);
  margin: 0 auto 48px;
}

.featured-products__header h2 {
  font-size: 36px;
  font-weight: 700;
}

.featured-products__header p {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-top: 12px;
}

.featured-products__more {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-primary);
  white-space: nowrap;
}

.featured-products__more:hover {
  color: var(--color-secondary);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: var(--container-width);
  margin: 0 auto;
}

.product-card {
  background: #fff;
  border-radius: var(--card-radius);
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-card);
}

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

.product-card__image {
  width: 100%;
  height: 200px;
  background: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-card__image-placeholder {
  font-size: 48px;
  color: var(--color-primary);
  opacity: 0.3;
}

.product-card__tag {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  background: rgba(0, 32, 96, 0.08);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 500;
  border-radius: 4px;
}

.product-card__body {
  padding: 24px;
}

.product-card__name {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.product-card__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ===== Stats Section ===== */
.stats {
  background: var(--color-primary);
  padding: 64px var(--section-padding-x);
}

.stats__grid {
  display: flex;
  justify-content: space-evenly;
  align-items: center;
  max-width: var(--container-width);
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 32px;
}

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

.stat-item__number {
  font-family: var(--font-sans);
  font-size: 44px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.stat-item__label {
  font-size: 15px;
  color: var(--color-text-on-dark-secondary);
  margin-top: 8px;
}

/* ===== QR Codes Section ===== */
.qr-section {
  background: var(--color-bg-lighter);
  padding: 64px var(--section-padding-x);
}

.qr-section__inner {
  max-width: var(--container-width);
  margin: 0 auto;
  text-align: center;
}

.qr-section__title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.qr-section__subtitle {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
}

.qr-section__grid {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.qr-card {
  background: #fff;
  border-radius: var(--card-radius);
  padding: 32px 40px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 280px;
}

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

.qr-card__image {
  width: 140px;
  height: 140px;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 20px;
  background: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-card__image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-card__placeholder {
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-card:hover .qr-card__placeholder {
  color: var(--color-secondary);
}

.qr-card__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.qr-card__desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===== R&D Capability Section ===== */
.rd-section {
  background: var(--color-bg-lighter);
}

.rd-section__group {
  margin-bottom: 48px;
}

.rd-section__group:last-child {
  margin-bottom: 0;
}

.rd-section__group-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.rd-section__group-icon {
  font-size: 22px;
}

.rd-section__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.rd-card {
  background: #fff;
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

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

.rd-card__image {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid #e5e5e5;
}

.rd-card__image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fff;
}

.rd-card__placeholder {
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.rd-card:hover .rd-card__placeholder {
  color: var(--color-secondary);
}

.rd-card__name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  padding: 14px 16px 4px;
  line-height: 1.5;
}

.rd-card__number {
  font-size: 12px;
  color: var(--color-text-secondary);
  padding: 0 16px 16px;
  line-height: 1.5;
}

/* ===== CTA Section ===== */
.cta-section {
  background: var(--color-primary);
  padding: 80px var(--section-padding-x);
  text-align: center;
}

.cta-section h2 {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 16px;
  color: var(--color-text-on-dark-secondary);
  margin-bottom: 32px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-primary);
  color: #fff;
  padding: 64px var(--section-padding-x);
}

.site-footer__top {
  display: flex;
  gap: 80px;
  max-width: var(--container-width);
  margin: 0 auto 40px;
}

.site-footer__brand {
  flex: 1;
}

.site-footer__brand-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
}

.site-footer__brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.site-footer__col {
  min-width: 120px;
}

.site-footer__col h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 14px;
}

.site-footer__col a {
  display: block;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.site-footer__col a:hover {
  color: #fff;
}

.site-footer__divider {
  width: 100%;
  height: 1px;
  background: var(--color-divider-dark);
  max-width: var(--container-width);
  margin: 0 auto;
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-width);
  margin: 24px auto 0;
}

.site-footer__copyright {
  font-size: 13px;
  color: var(--color-text-footer-muted);
}

.site-footer__legal {
  display: flex;
  gap: 24px;
}

.site-footer__legal a {
  font-size: 13px;
  color: var(--color-text-footer-muted);
}

.site-footer__legal a:hover {
  color: #fff;
}

/* ===== Page Banner ===== */
.page-banner {
  background: var(--color-primary);
  color: #fff;
  padding: 80px var(--section-padding-x);
  text-align: center;
}

.page-banner--light {
  background: var(--color-bg-light);
  color: var(--color-primary);
}

.page-banner h1 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-banner p {
  font-size: 16px;
  color: var(--color-text-on-dark-secondary);
}

.page-banner--light p {
  color: var(--color-text-secondary);
}

/* Breadcrumb */
.breadcrumb {
  padding: 16px var(--section-padding-x);
  background: var(--color-bg-white);
  border-bottom: 1px solid var(--color-divider);
}

.breadcrumb__inner {
  max-width: var(--container-width);
  margin: 0 auto;
  display: flex;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-tertiary);
}

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

/* ===== Product Filter Tabs ===== */
.product-filter {
  padding: 32px var(--section-padding-x) 0;
  background: var(--color-bg-white);
}

.product-filter__tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  max-width: var(--container-width);
  margin: 0 auto;
  flex-wrap: wrap;
}

.product-filter__tab {
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--btn-radius);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.product-filter__tab:hover {
  color: var(--color-primary);
  background: var(--color-bg-light);
}

.product-filter__tab.active {
  background: var(--color-primary);
  color: #fff;
}

/* Product grid (full page) */
.products-section {
  padding: 48px var(--section-padding-x) 80px;
}

.products-section .product-grid {
  grid-template-columns: repeat(3, 1fr);
}

/* ===== Industry Solutions ===== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: var(--container-width);
  margin: 0 auto;
}

.solution-card {
  background: #fff;
  border-radius: var(--card-radius);
  padding: 36px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
}

.solution-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.solution-card__icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  border-radius: var(--icon-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 22px;
  margin-bottom: 20px;
}

.solution-card__title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.solution-card__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ===== About Page ===== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  max-width: var(--container-width);
  margin: 0 auto;
}

.about-intro__text h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 24px;
}

.about-intro__text p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.about-intro__image {
  height: 400px;
  background: var(--color-bg-light);
  border-radius: var(--card-radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-intro__image span {
  font-size: 64px;
  color: var(--color-primary);
  opacity: 0.2;
}

/* Core Values */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: var(--container-width);
  margin: 0 auto;
}

.value-card {
  text-align: center;
  padding: 36px 24px;
  background: var(--color-bg-card);
  border-radius: var(--card-radius);
  transition: all var(--transition-base);
}

.value-card:hover {
  background: #fff;
  box-shadow: var(--shadow-hover);
}

.value-card__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
}

.value-card__title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.value-card__desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Timeline */
.timeline {
  max-width: var(--container-width);
  margin: 0 auto;
  position: relative;
}

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

.timeline-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 48px;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row-reverse;
}

.timeline-item__dot {
  width: 16px;
  height: 16px;
  background: var(--color-primary);
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--color-primary);
  position: absolute;
  left: 50%;
  top: 8px;
  transform: translateX(-50%);
  z-index: 1;
}

.timeline-item__content {
  width: calc(50% - 40px);
  padding: 24px;
  background: var(--color-bg-card);
  border-radius: var(--card-radius);
}

.timeline-item:nth-child(odd) .timeline-item__content {
  text-align: right;
}

.timeline-item__year {
  font-family: var(--font-sans);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.timeline-item__title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline-item__desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===== News Page ===== */
.news-featured {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 24px;
  max-width: var(--container-width);
  margin: 0 auto 48px;
}

.news-featured__main {
  background: #fff;
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
}

.news-featured__main:hover {
  box-shadow: var(--shadow-hover);
}

.news-featured__image {
  height: 280px;
  background: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

.news-featured__image span {
  font-size: 48px;
  color: var(--color-primary);
  opacity: 0.2;
}

.news-featured__body {
  padding: 32px;
}

.news-featured__tag {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(0, 32, 96, 0.08);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 500;
  border-radius: 4px;
  margin-bottom: 12px;
}

.news-featured__title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.4;
}

.news-featured__excerpt {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.news-featured__date {
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.news-featured__side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-side-card {
  display: flex;
  gap: 16px;
  background: #fff;
  border-radius: var(--card-radius);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
}

.news-side-card:hover {
  box-shadow: var(--shadow-hover);
}

.news-side-card__thumb {
  width: 100px;
  height: 100px;
  background: var(--color-bg-light);
  border-radius: 6px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.news-side-card__thumb span {
  font-size: 24px;
  color: var(--color-primary);
  opacity: 0.2;
}

.news-side-card__body {
  flex: 1;
  min-width: 0;
}

.news-side-card__title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-side-card__date {
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.news-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: var(--container-width);
  margin: 0 auto;
}

.news-card {
  background: #fff;
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
}

.news-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.news-card__image {
  height: 180px;
  background: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

.news-card__image span {
  font-size: 36px;
  color: var(--color-primary);
  opacity: 0.2;
}

.news-card__body {
  padding: 24px;
}

.news-card__tag {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(0, 32, 96, 0.08);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 500;
  border-radius: 4px;
  margin-bottom: 12px;
}

.news-card__title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}

.news-card__excerpt {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card__date {
  font-size: 13px;
  color: var(--color-text-tertiary);
}

/* Pagination */
.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 48px;
}

.pagination a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--btn-radius);
  font-size: 14px;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-divider);
  transition: all var(--transition-fast);
}

.pagination a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pagination a.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ===== Contact Page ===== */
.contact-section {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  max-width: var(--container-width);
  margin: 0 auto;
}

.contact-info__item {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
}

.contact-info__icon {
  width: 48px;
  height: 48px;
  background: var(--color-bg-light);
  border-radius: var(--icon-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 20px;
  flex-shrink: 0;
}

.contact-info__label {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: 4px;
}

.contact-info__value {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-primary);
}

.contact-form {
  background: #fff;
  border-radius: var(--card-radius);
  padding: 40px;
  box-shadow: var(--shadow-card);
}

.contact-form__group {
  margin-bottom: 20px;
}

.contact-form__label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--color-text-primary);
}

.contact-form__label .required {
  color: #e02020;
}

.contact-form__input,
.contact-form__textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-divider);
  border-radius: var(--btn-radius);
  font-size: 14px;
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast);
  background: var(--color-bg-white);
}

.contact-form__input:focus,
.contact-form__textarea:focus {
  border-color: var(--color-secondary);
}

.contact-form__textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Enterprise WeChat QR Section */
.qr-wecom {
  display: flex;
  align-items: center;
  gap: 48px;
  max-width: var(--container-width);
  margin: 0 auto;
  background: #fff;
  border-radius: var(--card-radius);
  padding: 40px 48px;
  box-shadow: var(--shadow-card);
}

.qr-wecom__info {
  flex: 1;
}

.qr-wecom__info h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.qr-wecom__info p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.qr-wecom__code {
  flex: 0 0 140px;
  width: 140px;
  height: 140px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-wecom__code img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-wecom__placeholder {
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Map Section — 百度地图 */
.map-section {
  background: var(--color-bg-light);
  padding: 80px var(--section-padding-x);
  text-align: center;
}

.map-section h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-primary);
}

.map-section p {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

/* 地图容器 */
.map-wrapper {
  max-width: var(--container-width);
  margin: 0 auto;
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.baidu-map {
  width: 100%;
  height: 450px;
  background: #e8eef5;
  position: relative;
  overflow: hidden;
}

.baidu-map--loaded {
  background: none;
}

.baidu-map--fallback {
  display: flex;
  align-items: stretch;
}

.baidu-map--fallback > iframe {
  flex: 1;
}

/* 回退模式信息卡片 */
.baidu-map__overlay {
  position: absolute;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 50%;
  height: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  padding: 24px;
  box-shadow: -4px 0 24px rgba(0, 32, 96, 0.08);
}

.baidu-map__card {
  width: 100%;
  text-align: left;
}

.baidu-map__card-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.baidu-map__card-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
  line-height: 1.6;
}

.baidu-map__card-icon {
  flex-shrink: 0;
  font-size: 16px;
}

.baidu-map__card-btn {
  display: inline-block;
  margin-top: 16px;
  padding: 10px 24px;
  background: var(--color-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--btn-radius);
  text-decoration: none;
  transition: background 0.2s;
}

.baidu-map__card-btn:hover {
  background: var(--color-primary-light);
}

/* 回退模式：品牌风格地图卡片 */
.baidu-map--fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-light);
}

.baidu-map__fallback {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.baidu-map__fallback-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.baidu-map__fallback-bg svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.baidu-map__fallback-pin {
  position: absolute;
  top: 38%;
  left: 50%;
  transform: translate(-50%, -100%);
  z-index: 1;
  filter: drop-shadow(0 4px 12px rgba(0, 32, 96, 0.3));
  animation: mapPinDrop 0.6s ease-out;
}

.baidu-map__fallback-pin svg {
  width: 48px;
  height: 62px;
}

@keyframes mapPinDrop {
  0% {
    transform: translate(-50%, -200%);
    opacity: 0;
  }
  60% {
    transform: translate(-50%, -90%);
  }
  80% {
    transform: translate(-50%, -105%);
  }
  100% {
    transform: translate(-50%, -100%);
    opacity: 1;
  }
}

.baidu-map__fallback-card {
  position: relative;
  z-index: 2;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  border-radius: var(--card-radius);
  padding: 32px 36px;
  max-width: 420px;
  width: 90%;
  box-shadow: 0 8px 40px rgba(0, 32, 96, 0.12);
  text-align: left;
}

.baidu-map__fallback-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.baidu-map__fallback-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
  line-height: 1.6;
}

.baidu-map__fallback-icon {
  flex-shrink: 0;
  font-size: 16px;
  line-height: 1.6;
}

.baidu-map__fallback-hint {
  margin-top: 16px;
  padding: 8px 12px;
  background: #E5EFFF;
  border-radius: 4px;
  font-size: 12px;
  color: var(--color-text-tertiary);
  line-height: 1.5;
}

.baidu-map__fallback-actions {
  margin-top: 20px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* JS API 模式信息窗口样式 */
.bmap-info {
  padding: 4px;
  min-width: 200px;
}

.bmap-info__title {
  font-size: 15px;
  font-weight: 700;
  color: #002060;
  margin-bottom: 8px;
}

.bmap-info__row {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  font-size: 13px;
  color: #737373;
  margin-bottom: 6px;
  line-height: 1.5;
}

.bmap-info__icon {
  flex-shrink: 0;
}

.bmap-info__link {
  display: inline-block;
  margin-top: 8px;
  font-size: 13px;
  color: #1450B8;
  text-decoration: none;
}

.bmap-info__link:hover {
  text-decoration: underline;
}

/* 地图下方操作按钮 */
.map-actions {
  max-width: var(--container-width);
  margin: 24px auto 0;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root {
    --section-padding-x: 40px;
  }

  .business-grid,
  .product-grid,
  .solutions-grid,
  .news-list {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .about-intro {
    grid-template-columns: 1fr;
  }

  .news-featured {
    grid-template-columns: 1fr;
  }

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

  .hero__title {
    font-size: 40px;
  }

  .hero--slider,
  .hero__slides,
  .hero__slide,
  .hero__loading {
    min-height: 480px;
  }

  .hero__arrow {
    width: 40px;
    height: 40px;
    font-size: 16px;
  }

  .hero__arrow--prev {
    left: 16px;
  }

  .hero__arrow--next {
    right: 16px;
  }

  .site-footer__top {
    flex-wrap: wrap;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding-x: 20px;
    --section-padding-y: 48px;
    --card-padding: 24px;
  }

  .menu-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--color-divider);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-base);
    pointer-events: none;
  }

  .site-nav.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .header-cta {
    display: none;
  }

  .hero {
    padding: 60px 20px;
    min-height: 400px;
  }

  .hero--slider,
  .hero__slides,
  .hero__slide,
  .hero__loading {
    min-height: 420px;
  }

  .hero__slide {
    padding: 48px 20px;
    gap: 20px;
  }

  .hero__loading {
    padding: 48px 20px;
    gap: 20px;
  }

  .hero__title {
    font-size: 28px;
  }

  .hero__subtitle {
    font-size: 14px;
    line-height: 1.6;
  }

  .hero__actions {
    flex-wrap: wrap;
    gap: 12px;
  }

  .hero__actions .btn {
    font-size: 14px;
    padding: 10px 20px;
  }

  /* Hide arrows on mobile, use dots + swipe */
  .hero__arrow {
    display: none;
  }

  .hero__dots {
    bottom: 20px;
    gap: 8px;
  }

  .hero__dot {
    width: 8px;
    height: 8px;
  }

  .hero__dot--active {
    width: 24px;
  }

  .hero__badge {
    font-size: 11px;
    padding: 4px 10px;
  }

  .business-grid,
  .product-grid,
  .solutions-grid,
  .news-list,
  .values-grid {
    grid-template-columns: 1fr;
  }

  .stats__grid {
    flex-direction: column;
    gap: 24px;
  }

  .featured-products__header {
    flex-direction: column;
    gap: 16px;
  }

  .section-header h2,
  .cta-section h2,
  .page-banner h1 {
    font-size: 28px;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(odd) {
    flex-direction: row;
  }

  .timeline-item__dot {
    left: 20px;
  }

  .timeline-item__content {
    width: calc(100% - 50px);
    margin-left: 50px;
  }

  .timeline-item:nth-child(odd) .timeline-item__content {
    text-align: left;
  }

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

  .baidu-map {
    height: 350px;
  }

  .baidu-map__overlay {
    position: relative;
    width: 100%;
    max-width: 100%;
    height: auto;
    padding: 16px;
    box-shadow: 0 -4px 24px rgba(0, 32, 96, 0.08);
  }

  .baidu-map__fallback-card {
    padding: 20px 24px;
    width: 92%;
  }

  .baidu-map__fallback-pin svg {
    width: 36px;
    height: 48px;
  }

  .map-actions {
    gap: 8px;
  }

  .map-actions .btn {
    font-size: 13px;
    padding: 8px 16px;
  }

  .site-footer__bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .news-featured {
    grid-template-columns: 1fr;
  }

  /* QR Code sections — mobile */
  .qr-section__grid {
    gap: 24px;
  }

  .qr-card {
    padding: 24px;
    max-width: 100%;
  }

  .qr-card__image {
    width: 120px;
    height: 120px;
  }

  .qr-wecom {
    flex-direction: column;
    gap: 24px;
    padding: 28px 24px;
    text-align: center;
  }

  .qr-wecom__code {
    flex: 0 0 120px;
    width: 120px;
    height: 120px;
  }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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