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

body {
  font-family: "Microsoft YaHei", "微软雅黑", "Segoe UI", "Lucida Grande", Helvetica, Arial, sans-serif;
  font-size: 14px;
  color: #333;
  background: #f5f7fa;
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: #333;
  transition: color 0.3s;
}

a:hover {
  color: #1a5fa8;
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

.clearfix::after {
  content: "";
  display: block;
  clear: both;
}

/* ========== Header ========== */
.header {
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

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

.logo-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  margin-right: 12px;
  object-fit: cover;
}

.logo-text h2 {
  font-size: 20px;
  color: #1a5fa8;
  letter-spacing: 1px;
}

.logo-text span {
  font-size: 12px;
  color: #999;
}

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

.nav-item {
  position: relative;
  padding: 0 18px;
}

.nav-item > a {
  display: block;
  font-size: 16px;
  color: #333;
  line-height: 70px;
  height: 70px;
  border-bottom: 2px solid transparent;
  transition: all 0.3s;
}

.nav-item > a:hover,
.nav-item > a.active {
  color: #1a5fa8;
  border-bottom-color: #1a5fa8;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 26px;
  color: #1a5fa8;
  cursor: pointer;
}

.mobile-menu {
  display: none;
}

/* ========== Banner ========== */
.banner {
  margin-top: 70px;
  height: 500px;
  background: url(../images/banner.png) center/cover no-repeat;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.banner::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.03);
}

.banner::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
}

.banner-content {
  text-align: center;
  color: #fff;
  z-index: 1;
  padding: 0 20px;
}

.banner-content h1 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 4px;
  margin-bottom: 16px;
}

.banner-content p {
  font-size: 18px;
  opacity: 0.9;
  letter-spacing: 2px;
}

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

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  animation: float 6s infinite ease-in-out;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.3; }
  50% { transform: translateY(-40px) rotate(180deg); opacity: 0.8; }
}

/* ========== Section Title ========== */
.section {
  padding: 60px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 40px;
}

.section-title h2 {
  font-size: 28px;
  color: #1a5fa8;
  letter-spacing: 2px;
  margin-bottom: 10px;
}

.section-title p {
  color: #999;
  font-size: 15px;
}

.section-title .divider {
  display: inline-block;
  width: 50px;
  height: 3px;
  background: #1a5fa8;
  margin-top: 12px;
}

/* ========== Service Cards ========== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.service-card {
  background: #fff;
  border-radius: 2px;
  border: 1px solid #e8e8e8;
  padding: 30px 20px;
  text-align: center;
  box-shadow: none;
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.service-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.service-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.si {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
}

.service-card:nth-child(1) .service-icon { background: #1a5fa8; }
.service-card:nth-child(2) .service-icon { background: #1a5fa8; }
.service-card:nth-child(3) .service-icon { background: #1a5fa8; }
.service-card:nth-child(4) .service-icon { background: #1a5fa8; }
.service-card:nth-child(5) .service-icon { background: #1a5fa8; }

.service-card h3 {
  font-size: 17px;
  color: #1a5fa8;
  margin-bottom: 8px;
}

.service-card p {
  font-size: 13px;
  color: #999;
  line-height: 1.6;
}

/* ========== News Section ========== */
.news-section {
  background: #fff;
}

.news-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.news-box {
  background: #fafbfc;
  border-radius: 8px;
  padding: 24px;
}

.news-tab {
  display: flex;
  border-bottom: 2px solid #e8e8e8;
  margin-bottom: 16px;
}

.news-tab-item {
  padding: 8px 20px;
  font-size: 16px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.3s;
  color: #666;
}

.news-tab-item:hover {
  color: #1a5fa8;
}

.news-tab-item.active {
  color: #1a5fa8;
  border-bottom-color: #1a5fa8;
}

.news-list {
  display: none;
}

.news-list.active {
  display: block;
}

.news-list li {
  padding: 10px 0;
  border-bottom: 1px dashed #e8e8e8;
}

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

.news-list li a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #555;
  font-size: 14px;
}

.news-list li a:hover {
  color: #1a5fa8;
}

.news-list li a .news-date {
  color: #bbb;
  font-size: 12px;
  white-space: nowrap;
  margin-left: 12px;
}

.news-list li a::before {
  content: "●";
  color: #1a5fa8;
  font-size: 8px;
  margin-right: 10px;
  flex-shrink: 0;
}

.news-more {
  display: block;
  text-align: right;
  margin-top: 12px;
  font-size: 13px;
  color: #1a5fa8;
}

/* ========== About Preview ========== */
.about-preview {
  background: #fff;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.about-text h3 {
  font-size: 24px;
  color: #1a5fa8;
  margin-bottom: 20px;
}

.about-text p {
  color: #666;
  line-height: 1.8;
  margin-bottom: 12px;
}

.about-text .btn {
  display: inline-block;
  margin-top: 16px;
  padding: 10px 30px;
  background: #1a5fa8;
  color: #fff;
  border-radius: 4px;
  font-size: 15px;
  transition: background 0.3s;
}

.about-text .btn:hover {
  background: #0d3b6e;
  color: #fff;
}

.about-image {
  width: 100%;
  height: 300px;
  border-radius: 8px;
  object-fit: contain;
  background: linear-gradient(135deg, #e8f0fe, #d0e3fa);
  padding: 30px;
}

/* ========== Stats ========== */
.stats {
  background: linear-gradient(135deg, #0d3b6e, #1a5fa8);
  padding: 50px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-item h3 {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
}

.stat-item p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 6px;
}

/* ========== Footer ========== */
.footer {
  background: #1a1f2b;
  color: #b0b8c4;
  padding: 40px 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
}

.footer-info h3 {
  font-size: 20px;
  color: #fff;
  margin-bottom: 16px;
}

.footer-info p {
  font-size: 13px;
  line-height: 2;
}

.footer-links h4 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 14px;
}

.footer-links a {
  display: block;
  color: #b0b8c4;
  font-size: 13px;
  line-height: 2.2;
}

.footer-links a:hover {
  color: #2b7bd6;
}

.footer-bottom {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 12px;
  color: #6b7280;
}

/* ========== Partners Section ========== */
.partners-section {
  background: #fff;
  padding: 36px 0;
}

/* ========== Footer Partners ========== */
.footer-partners {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 36px;
  padding: 0;
  flex-wrap: wrap;
}

.footer-partners a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  transition: opacity 0.3s;
}

.footer-partners a:hover {
  opacity: 0.8;
}

.partner-img {
  max-height: 56px;
  width: auto;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
  background: rgba(255,255,255,0.06);
}

.partner-textimg {
  width: 180px;
  height: 56px;
  border-radius: 4px;
  background: #d6e8fa;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #1a5fa8;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.partner-label {
  font-size: 11px;
  color: #8899aa;
  text-align: center;
  max-width: 80px;
}

/* ========== Page Banner ========== */
.page-banner {
  margin-top: 70px;
  height: 200px;
  background: linear-gradient(135deg, #0d3b6e, #1a5fa8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-align: center;
}

.page-banner h1 {
  font-size: 30px;
  letter-spacing: 4px;
}

.page-banner .breadcrumb {
  margin-top: 8px;
  font-size: 13px;
  opacity: 0.8;
}

.page-banner .breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
}

.page-banner .breadcrumb a:hover {
  color: #fff;
}

/* ========== Page Content ========== */
.page-content {
  padding: 40px 0;
}

.content-card {
  background: #fff;
  border-radius: 8px;
  padding: 40px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.content-card h2 {
  font-size: 24px;
  color: #1a5fa8;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid #e8f0fe;
}

.content-card h3 {
  font-size: 18px;
  color: #333;
  margin: 24px 0 12px;
}

.content-card p {
  color: #666;
  line-height: 1.8;
  margin-bottom: 12px;
}

/* ========== About Page ========== */
.about-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 30px 0;
}

.about-feature {
  text-align: center;
  padding: 24px 16px;
  background: #fafbfc;
  border-radius: 8px;
}

.about-feature .feat-icon {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #1a5fa8;
  margin: 0 auto 12px;
}

.about-feature h4 {
  font-size: 16px;
  color: #333;
  margin-bottom: 8px;
}

.about-feature p {
  font-size: 13px;
  color: #999;
}

.company-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.company-table th,
.company-table td {
  padding: 12px 16px;
  border: 1px solid #e8e8e8;
  text-align: left;
  font-size: 14px;
}

.company-table th {
  background: #fafbfc;
  color: #1a5fa8;
  width: 180px;
  font-weight: normal;
}

/* ========== Services Page ========== */
.service-detail {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-detail-card {
  background: #fafbfc;
  border-radius: 8px;
  padding: 30px;
  transition: box-shadow 0.3s;
}

.service-detail-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.service-detail-card .sd-icon {
  display: none;
}

.service-detail-card h3 {
  font-size: 18px;
  color: #1a5fa8;
  margin-bottom: 10px;
}

.service-detail-card p {
  font-size: 14px;
  color: #888;
  line-height: 1.7;
}

/* ========== News Page ========== */
.news-list-page li {
  padding: 18px 0;
  border-bottom: 1px solid #eee;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.news-list-page li a {
  font-size: 16px;
  color: #333;
}

.news-list-page li a:hover {
  color: #1a5fa8;
}

.news-list-page li .date {
  font-size: 13px;
  color: #bbb;
  white-space: nowrap;
  margin-left: 20px;
}

/* ========== Contact Page ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 24px;
}

.contact-info-item .ci-icon {
  display: none;
}

.contact-info-item h4 {
  font-size: 15px;
  color: #333;
  margin-bottom: 4px;
}

.contact-info-item p {
  font-size: 14px;
  color: #888;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px;
  margin-bottom: 16px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: #1a5fa8;
}

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

.contact-form .btn-submit {
  padding: 12px 36px;
  background: #1a5fa8;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.3s;
}

.contact-form .btn-submit:hover {
  background: #0d3b6e;
}

/* ========== Responsive ========== */
@media (max-width: 992px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .about-image {
    height: 200px;
    padding: 20px;
  }

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

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

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

  .service-detail {
    grid-template-columns: 1fr;
  }

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

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

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

  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 10px 0;
  }

  .nav.open .nav-item {
    padding: 0;
  }

  .nav.open .nav-item > a {
    line-height: 48px;
    height: 48px;
    padding: 0 24px;
    border-bottom: none;
  }

  .nav-toggle {
    display: block;
  }

  .mobile-menu {
    display: block;
  }

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

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

  .banner {
    height: 400px;
  }

  .section {
    padding: 40px 0;
  }

  .content-card {
    padding: 20px;
  }

  .company-table th {
    width: 100px;
    font-size: 12px;
  }

  .company-table td {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .services-grid {
    grid-template-columns: 1fr;
  }

  .banner-content h1 {
    font-size: 22px;
    letter-spacing: 2px;
  }

.banner-content p {
    font-size: 14px;
  }

  .section-title h2 {
    font-size: 22px;
  }

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