* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: #333;
  line-height: 1.6;
  font-size: 16px;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  vertical-align: middle;
}

.container {
  width: 1200px;
  max-width: 100%;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

.bg-light {
  background-color: #f5f8fc;
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 32px;
  color: #0d47a1;
  margin-bottom: 15px;
  position: relative;
}

.section-title h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: #1a73e8;
  margin: 15px auto 0;
}

.section-title p {
  font-size: 16px;
  color: #666;
}

.section-more {
  text-align: center;
  margin-top: 40px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 25px;
  font-size: 16px;
  font-weight: 500;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: #fff100;
  color: #333;
}

.btn-primary:hover {
  background: #ffd600;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 241, 0, 0.4);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid #fff;
}

.btn-outline:hover {
  background: #fff;
  color: #0d47a1;
}

.btn-light {
  background: #fff;
  color: #0d47a1;
}

.btn-light:hover {
  background: #f0f0f0;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
}

.btn-link {
  color: #1a73e8;
  font-weight: 500;
  transition: color 0.3s;
}

.btn-link:hover {
  color: #0d47a1;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 70px;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  z-index: 100;
}

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

.logo {
  flex-shrink: 0;
}

.logo-text {
  font-size: 24px;
  font-weight: bold;
  color: #0d47a1;
}

.logo img {
  height: 45px;
}

.nav ul {
  display: flex;
  gap: 5px;
}

.nav ul li a {
  display: block;
  padding: 10px 20px;
  font-size: 15px;
  color: #333;
  border-radius: 20px;
  transition: all 0.3s;
}

.nav ul li a:hover,
.nav ul li.active a {
  background: #e3f2fd;
  color: #0d47a1;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: #333;
  border-radius: 3px;
  transition: all 0.3s;
}

/* Hero */
.hero {
  position: relative;
  height: 600px;
  margin-top: 70px;
  overflow: hidden;
}

.hero-slider {
  position: relative;
  height: 100%;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s;
  display: flex;
  align-items: center;
}

.slide.active {
  opacity: 1;
}

.slide-content {
  max-width: 650px;
}

.slide-content h1 {
  font-size: 42px;
  color: #fff;
  margin-bottom: 20px;
  line-height: 1.3;
}

.slide-content p {
  font-size: 18px;
  color: rgba(255,255,255,0.9);
  margin-bottom: 35px;
  line-height: 1.8;
}

.slide-content .btn {
  margin-right: 15px;
}

.slider-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
}

.slider-dots span {
  display: block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: all 0.3s;
}

.slider-dots span.active {
  background: #fff;
  transform: scale(1.2);
}

.slider-arrows {
  position: absolute;
  top: 50%;
  width: 100%;
  left: 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  padding: 0 30px;
  pointer-events: none;
}

.slider-arrows .arrow {
  pointer-events: auto;
  width: 50px;
  height: 50px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
  cursor: pointer;
  transition: all 0.3s;
}

.slider-arrows .arrow:hover {
  background: rgba(255,255,255,0.4);
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.feature-item {
  text-align: center;
  padding: 40px 25px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 15px rgba(0,0,0,0.05);
  transition: all 0.3s;
}

.feature-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.feature-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 20px;
  background: #e3f2fd;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
}

.feature-item h3 {
  font-size: 20px;
  color: #0d47a1;
  margin-bottom: 12px;
}

.feature-item p {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
}

/* About */
.about-wrap {
  display: flex;
  align-items: center;
  gap: 60px;
}

.about-image {
  flex: 0 0 480px;
}

.about-img-placeholder {
  width: 100%;
  height: 350px;
  background: linear-gradient(135deg, #e3f2fd, #bbdefb);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
}

.about-text h2 {
  font-size: 30px;
  color: #0d47a1;
  margin-bottom: 20px;
}

.about-text h2::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: #1a73e8;
  margin-top: 12px;
}

.about-text p {
  font-size: 15px;
  color: #555;
  line-height: 1.8;
  margin-bottom: 18px;
}

/* Products */
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
}

.product-item {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 15px rgba(0,0,0,0.05);
  transition: all 0.3s;
}

.product-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.product-img {
  height: 200px;
}

.product-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 60px;
}

.product-item h3 {
  font-size: 17px;
  color: #0d47a1;
  padding: 15px 20px 8px;
}

.product-item p {
  font-size: 14px;
  color: #666;
  padding: 0 20px;
  line-height: 1.7;
}

.product-item .btn-link {
  display: inline-block;
  padding: 10px 20px 20px;
}

/* Numbers */
.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.numbers-grid.three-cols {
  grid-template-columns: repeat(3, 1fr);
  max-width: 800px;
  margin: 0 auto;
}

.number-item h3 {
  font-size: 48px;
  font-weight: bold;
  margin-bottom: 10px;
}

.number-item p {
  font-size: 18px;
  opacity: 0.9;
}

/* Cases */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.case-item {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 15px rgba(0,0,0,0.05);
  transition: all 0.3s;
}

.case-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.case-img {
  height: 220px;
}

.case-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: #fff;
  background: linear-gradient(135deg, #1a73e8, #0d47a1);
}

.case-info {
  padding: 25px;
}

.case-info h3 {
  font-size: 18px;
  color: #0d47a1;
  margin-bottom: 10px;
}

.case-info p {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
}

/* News */
.news-grid {
  max-width: 900px;
  margin: 0 auto;
}

.news-item {
  display: flex;
  gap: 25px;
  padding: 25px 0;
  border-bottom: 1px solid #eee;
}

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

.news-date {
  flex-shrink: 0;
  width: 80px;
  text-align: center;
  background: #e3f2fd;
  border-radius: 8px;
  padding: 12px 0;
}

.news-date .day {
  display: block;
  font-size: 28px;
  font-weight: bold;
  color: #0d47a1;
}

.news-date .month {
  display: block;
  font-size: 13px;
  color: #666;
  margin-top: 3px;
}

.news-content h3 {
  font-size: 18px;
  color: #333;
  margin-bottom: 8px;
  transition: color 0.3s;
}

.news-item:hover .news-content h3 {
  color: #1a73e8;
}

.news-content p {
  font-size: 14px;
  color: #888;
  margin-bottom: 10px;
}

/* CTA */
.cta {
  text-align: center;
}

.cta h2 {
  font-size: 32px;
  margin-bottom: 15px;
}

.cta p {
  font-size: 18px;
  opacity: 0.9;
  margin-bottom: 30px;
}

.cta-phone {
  display: inline-block;
  margin-left: 20px;
  font-size: 20px;
  font-weight: bold;
}

/* Footer */
.footer {
  background: #1a2332;
  color: #b0bec5;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding: 60px 0 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-col h4 {
  color: #fff;
  font-size: 18px;
  margin-bottom: 20px;
}

.footer-col p {
  font-size: 14px;
  line-height: 1.8;
}

.footer-col ul li {
  font-size: 14px;
  padding: 6px 0;
}

.footer-col ul li a:hover {
  color: #fff;
}

.footer-bottom {
  text-align: center;
  padding: 20px 0;
  font-size: 13px;
}

.footer-bottom a {
  color: #b0bec5;
}

.footer-bottom a:hover {
  color: #fff;
}

/* ===== Page Banner ===== */
.page-banner {
  height: 250px;
  margin-top: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0d47a1, #1a73e8);
  color: #fff;
  text-align: center;
}

.page-banner h1 {
  font-size: 36px;
  margin-bottom: 10px;
}

.page-banner p {
  font-size: 16px;
  opacity: 0.9;
}

.breadcrumb {
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  margin-top: 10px;
}

.breadcrumb a {
  color: rgba(255,255,255,0.7);
}

.breadcrumb a:hover {
  color: #fff;
}

/* ===== About Page ===== */
.about-page-content {
  padding: 80px 0;
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.mission-item {
  text-align: center;
  padding: 40px 25px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}

.mission-item .icon {
  font-size: 48px;
  margin-bottom: 15px;
}

.mission-item h3 {
  font-size: 20px;
  color: #0d47a1;
  margin-bottom: 10px;
}

.mission-item p {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
}

.team-item {
  text-align: center;
  padding: 30px 20px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}

.team-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: #e3f2fd;
  margin: 0 auto 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
}

.team-item h4 {
  font-size: 18px;
  color: #0d47a1;
  margin-bottom: 5px;
}

.team-item p {
  font-size: 13px;
  color: #888;
}

/* ===== Contact Page ===== */
.contact-page-content {
  padding: 80px 0;
}

.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}

.contact-info-item {
  display: flex;
  gap: 15px;
  margin-bottom: 30px;
}

.contact-info-item .icon {
  width: 50px;
  height: 50px;
  background: #e3f2fd;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.contact-info-item h4 {
  font-size: 16px;
  color: #0d47a1;
  margin-bottom: 5px;
}

.contact-info-item p {
  font-size: 14px;
  color: #555;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 15px;
  margin-bottom: 15px;
  font-family: inherit;
  transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: #1a73e8;
}

.contact-form textarea {
  height: 150px;
  resize: vertical;
}

.contact-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.map-placeholder {
  width: 100%;
  height: 300px;
  background: #e3f2fd;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #0d47a1;
  margin-top: 40px;
}

/* ===== Products Page ===== */
.products-page-content {
  padding: 80px 0;
}

.prod-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.prod-detail-item {
  display: flex;
  gap: 20px;
  background: #fff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}

.prod-detail-item .icon {
  width: 60px;
  height: 60px;
  background: #e3f2fd;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  flex-shrink: 0;
}

.prod-detail-item h3 {
  font-size: 18px;
  color: #0d47a1;
  margin-bottom: 8px;
}

.prod-detail-item p {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
}

/* ===== News Page ===== */
.news-page-content {
  padding: 80px 0;
}

.news-list-item {
  display: flex;
  gap: 25px;
  padding: 30px;
  margin-bottom: 20px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.04);
}

.news-list-item .thumb {
  width: 220px;
  height: 150px;
  flex-shrink: 0;
  border-radius: 8px;
  background: linear-gradient(135deg, #e3f2fd, #bbdefb);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
}

.news-list-content {
  flex: 1;
}

.news-list-content h3 {
  font-size: 18px;
  color: #333;
  margin-bottom: 10px;
}

.news-list-content .meta {
  font-size: 13px;
  color: #999;
  margin-bottom: 10px;
}

.news-list-content p {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .features-grid,
  .products-grid,
  .numbers-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .numbers-grid.three-cols {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

  .about-wrap {
    flex-direction: column;
  }

  .about-image {
    flex: none;
    width: 100%;
  }

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

  .contact-wrap,
  .prod-detail-grid {
    grid-template-columns: 1fr;
  }
}

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

  .nav.open {
    display: block;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: #fff;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  }

  .nav.open ul {
    flex-direction: column;
    padding: 20px;
  }

  .menu-toggle {
    display: flex;
  }

  .features-grid,
  .products-grid,
  .numbers-grid,
  .numbers-grid.three-cols,
  .cases-grid,
  .mission-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }

  .slide-content h1 {
    font-size: 28px;
  }

  .hero {
    height: 450px;
  }

  .news-list-item {
    flex-direction: column;
  }

  .news-list-item .thumb {
    width: 100%;
    height: 180px;
  }

  .section-title h2 {
    font-size: 26px;
  }

  .news-item {
    flex-direction: column;
    gap: 12px;
  }

  .news-date {
    display: flex;
    align-items: center;
    gap: 10px;
    width: auto;
    padding: 8px 15px;
  }
}