:root {
  --primary: #1A3A5C;
  --primary-light: #2a4a70;
  --accent: #FF6B35;
  --accent-hover: #e55a2b;
  --bg: #f8f9fa;
  --text: #1a1a2e;
  --text-light: #5a5a6a;
  --white: #ffffff;
  --border: #e0e2e7;
  --shadow: 0 4px 20px rgba(26,58,92,0.08);
  --shadow-hover: 0 8px 32px rgba(26,58,92,0.12);
}

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

html {
  scroll-behavior: smooth;
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", sans-serif;
  color: var(--text);
  background: var(--white);
}

body { line-height: 1.7; font-size: 16px; }

/* 导航 */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 88px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo img { height: 56px; width: auto; }

.nav-logo-text {
  font-size: 24px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 1px;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  flex-wrap: nowrap;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-size: 16px;
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--accent);
  transition: width 0.3s;
}

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

/* 二级下拉菜单 */
.nav-dropdown {
  position: relative;
}

.nav-dropdown > a::before {
  content: "";
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid currentColor;
  margin-right: 8px;
  vertical-align: middle;
  transition: transform 0.3s;
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(26,58,92,0.12);
  min-width: 160px;
  padding: 8px 0;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  z-index: 1001;
}

.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown:hover > a::before {
  transform: rotate(180deg);
}

.nav-dropdown-menu li a {
  display: block;
  padding: 12px 24px;
  font-size: 14px;
  color: var(--text);
  white-space: nowrap;
  transition: all 0.2s;
}

.nav-dropdown-menu li a::after { display: none; }

.nav-dropdown-menu li a:hover {
  background: rgba(255,107,53,0.06);
  color: var(--accent);
  padding-left: 28px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary);
  margin: 6px 0;
  transition: 0.3s;
}

/* 通用区块 */
section {
  padding: 100px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: 36px;
  font-weight: 600;
  color: var(--primary);
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 64px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.section-divider {
  width: 60px;
  height: 4px;
  background: var(--accent);
  margin: 0 auto 64px;
  border-radius: 2px;
}

/* 内页头部 */
.page-header {
  background: linear-gradient(135deg, var(--primary) 0%, #0d1f33 100%);
  color: var(--white);
  padding: 160px 24px 80px;
  text-align: center;
}

.page-header h1 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.page-header p {
  font-size: 17px;
  color: rgba(255,255,255,0.8);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
}

.page-header .breadcrumb {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  margin-bottom: 24px;
}

.page-header .breadcrumb a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
}

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

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary) 0%, #0d1f33 100%);
  color: var(--white);
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.03)"/></svg>');
  background-size: 40px 40px;
  opacity: 0.5;
}

.hero-content { position: relative; z-index: 1; max-width: 900px; }

.hero-badge {
  display: inline-block;
  padding: 8px 24px;
  background: rgba(255,107,53,0.15);
  border: 1px solid rgba(255,107,53,0.3);
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
  border-radius: 24px;
  margin-bottom: 32px;
  letter-spacing: 2px;
}

.hero h1 {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: 3px;
}

.hero h1 .highlight { color: var(--accent); }

.hero-desc {
  font-size: 18px;
  line-height: 1.9;
  color: rgba(255,255,255,0.85);
  margin-bottom: 48px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  text-align: justify;
  padding: 0 8px;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 16px 40px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,107,53,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-top: 80px;
  flex-wrap: wrap;
}

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

.stat-number {
  font-size: 42px;
  font-weight: 700;
  color: var(--accent);
  display: block;
  line-height: 1;
}

.stat-label {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-top: 8px;
  letter-spacing: 1px;
}

/* 能力卡片 */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 32px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

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

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 56px;
  height: 56px;
  background: rgba(255,107,53,0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 24px;
  color: var(--accent);
}

.service-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 16px;
}

.service-card p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
}

/* 发展方向 */
.directions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  margin-top: 48px;
}

.direction-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 16px;
  padding: 48px 40px;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.direction-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  width: 0;
  transition: width 0.4s ease;
}

.direction-card:hover::before {
  width: 100%;
}

.direction-card:hover {
  transform: translateY(-6px);
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.2);
}

.direction-icon {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  background: rgba(255,107,53,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 28px;
  transition: all 0.3s ease;
}

.direction-card:hover .direction-icon {
  background: var(--accent);
  color: var(--white);
}

.direction-card h3 {
  font-size: 26px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 16px;
}

.direction-card > p {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
  margin-bottom: 24px;
}

.direction-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.direction-tags span {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255,107,53,0.15);
  color: var(--accent);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.direction-card:hover .direction-tags span {
  background: rgba(255,107,53,0.25);
}

/* 案例 */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.case-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

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

.case-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--primary);
  color: var(--white);
  font-size: 13px;
  font-weight: 500;
  border-radius: 0 0 12px 0;
}

.case-content {
  padding: 32px;
}

.case-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
}

.case-content p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
}

.case-meta {
  display: flex;
  gap: 24px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-light);
}

.case-meta span { display: flex; align-items: center; gap: 6px; }

/* 关于我们 */
.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: start;
}

.about-text h3 {
  font-size: 28px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
}

.about-text p {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 20px;
}

.about-certs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: rgba(26,58,92,0.04);
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

.cert-icon {
  width: 36px; height: 36px;
  background: rgba(255,107,53,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 16px;
  flex-shrink: 0;
}

.cert-item div { font-size: 14px; }
.cert-item div strong {
  display: block;
  color: var(--primary);
  font-weight: 600;
}
.cert-item div span {
  color: var(--text-light);
  font-size: 13px;
}

/* 联系我们 */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 48px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s;
  background: var(--white);
}

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

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

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

.contact-info {
  background: var(--primary);
  color: var(--white);
  border-radius: 12px;
  padding: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.contact-info h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 32px;
}

.contact-info p {
  font-size: 15px;
  color: rgba(255,255,255,0.8);
  line-height: 1.8;
  margin-bottom: 32px;
}

.qrcode-box {
  background: var(--white);
  padding: 16px;
  border-radius: 12px;
  margin-bottom: 24px;
}

.qrcode-box img {
  width: 180px;
  height: 180px;
  display: block;
}

.contact-info .hint {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
}

/* 页脚 */
footer {
  background: var(--primary);
  color: rgba(255,255,255,0.6);
  padding: 40px 24px;
  text-align: center;
  font-size: 14px;
}

.footer-content { max-width: 640px; margin: 0 auto; }
.footer-content p { margin-bottom: 8px; }
.footer-links { display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; font-size: 13px; }
.footer-desc { font-size: 13px; color: rgba(255,255,255,0.4); margin-top: 12px; }
.footer-copy { font-size: 12px; color: rgba(255,255,255,0.3); margin-top: 12px; }

.footer-beian { font-size: 12px; color: rgba(255,255,255,0.35); margin-top: 8px; }
.footer-beian a { color: rgba(255,255,255,0.45); text-decoration: none; transition: color 0.3s; }
.footer-beian a:hover { color: var(--accent); }

footer a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
}

/* 技术栈 */
.tech-section { background: var(--primary); color: var(--white); }
.tech-section .section-title { color: var(--white); }
.tech-section .section-subtitle { color: rgba(255,255,255,0.7); }
.tech-section .section-divider { background: var(--accent); }

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

.tech-col h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}

.tech-items {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tech-tag {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 6px;
  font-size: 14px;
  color: rgba(255,255,255,0.85);
  transition: all 0.2s;
}

.tech-tag:hover {
  background: rgba(255,107,53,0.15);
  border-color: rgba(255,107,53,0.3);
  color: var(--accent);
}

/* 数据治理咨询 */
.dg-value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-bottom: 56px;
}

.dg-value-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 28px;
  border-left: 4px solid var(--accent);
}

.dg-value-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
}

.dg-value-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

.dg-services-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}

.dg-service-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.dg-service-num {
  width: 40px; height: 40px;
  background: var(--primary);
  color: var(--white);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
}

.dg-service-item h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
}

.dg-timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.dg-timeline-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  text-align: center;
}

.dg-timeline-item .week {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  display: block;
}

.dg-timeline-item .label {
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  margin: 8px 0;
}

.dg-timeline-item .desc {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

.green-check { color: #3B6D11; font-weight: 700; }

/* 为什么选我们 */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.why-card {
  text-align: center;
  padding: 48px 32px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all 0.3s ease;
}

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

.why-icon {
  width: 64px; height: 64px;
  margin: 0 auto 24px;
  background: rgba(255,107,53,0.1);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.why-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 16px;
}

.why-card p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
}

/* 行业洞察 / 资讯列表 */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.insight-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  transition: all 0.3s ease;
  cursor: pointer;
}

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

.insight-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(255,107,53,0.1);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  margin-bottom: 16px;
}

.insight-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
}

.insight-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}

.insight-meta {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-light);
  display: flex;
  gap: 16px;
}

/* FAQ */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 16px;
  overflow: hidden;
}

.faq-item summary {
  padding: 24px 32px;
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  font-size: 24px;
  color: var(--accent);
  font-weight: 400;
  transition: transform 0.3s;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item[open] summary {
  color: var(--accent);
  border-bottom: 1px solid var(--border);
}

.faq-item .faq-answer {
  padding: 24px 32px;
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.9;
}

.faq-item .faq-answer strong {
  color: var(--primary);
}

/* 文章详情页 */
.article {
  max-width: 820px;
  margin: 0 auto;
  padding: 60px 24px 100px;
}

.article-meta {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 24px;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.article h1 {
  font-size: 34px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.4;
  margin-bottom: 16px;
}

.article h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--primary);
  margin: 40px 0 16px;
}

.article p {
  font-size: 16px;
  color: var(--text);
  line-height: 1.9;
  margin-bottom: 20px;
}

.article .back-link {
  display: inline-block;
  margin-top: 48px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.article .back-link:hover { text-decoration: underline; }

/* CTA 区块 */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, #0d1f33 100%);
  color: var(--white);
  text-align: center;
  padding: 80px 24px;
}

.cta-section h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 17px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 32px;
}

/* 双栏布局 */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

/* 响应式 */
@media (max-width: 1100px) {
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 88px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 16px 20px;
    gap: 0;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 32px rgba(26,58,92,0.12);
    max-height: 80vh;
    overflow-y: auto;
  }
  .nav-links.active > li {
    width: 100%;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.active > li:last-child { border-bottom: none; }
  .nav-dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    display: none;
    box-shadow: none;
    border: none;
    padding: 4px 0 4px 16px;
    min-width: auto;
  }
  .nav-dropdown.expanded .nav-dropdown-menu { display: block; }
  .nav-dropdown > a::before { display: none; }
  .hero h1 { font-size: 36px; }
  .hero-desc { font-size: 16px; text-align: left; }
  .hero-stats { gap: 32px; }
  .contact-wrapper { grid-template-columns: 1fr; }
  .section-title { font-size: 28px; }
  .form-row { grid-template-columns: 1fr; }
  .about-certs { grid-template-columns: 1fr; }
  section { padding: 64px 20px; }
  .tech-grid { grid-template-columns: 1fr; gap: 32px; }
  .why-grid { grid-template-columns: 1fr; gap: 24px; }
  .dg-services-list { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .directions-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .hero h1 { font-size: 28px; }
  .hero-desc { font-size: 15px; text-align: left; }
  .hero-stats { flex-direction: column; gap: 24px; }
  .stat-number { font-size: 32px; }
  .btn { padding: 14px 28px; font-size: 14px; }
  .contact-form { padding: 28px; }
  .contact-info { padding: 32px; }
  .services-grid { grid-template-columns: 1fr; }
  .direction-card { padding: 32px 24px; }
  .page-header h1 { font-size: 28px; }
  .article h1 { font-size: 26px; }
}