/* ===== 全局变量与基础重置 ===== */
:root {
  --primary: #0A2540;
  --primary-light: #1a3a5c;
  --accent: #FF6B35;
  --accent-dark: #e55a2b;
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --text: #2d3748;
  --text-light: #718096;
  --border: #e2e8f0;
  --shadow: 0 4px 20px rgba(10, 37, 64, 0.08);
  --shadow-hover: 0 12px 32px rgba(10, 37, 64, 0.15);
  --radius: 8px;
  --max-width: 1200px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ===== Banner 导航一体区 ===== */
.banner-section {
  position: relative;
  min-height: 640px;
  background: linear-gradient(135deg, #0A2540 0%, #1a3a5c 40%, #0A2540 100%);
  overflow: hidden;
}
.banner-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255, 107, 53, 0.12) 0%, transparent 40%),
              radial-gradient(circle at 70% 30%, rgba(100, 181, 246, 0.1) 0%, transparent 40%);
  animation: bannerFlow 12s ease-in-out infinite;
}
@keyframes bannerFlow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(3%, -2%) scale(1.05); }
}
.banner-section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.banner-inner {
  position: relative;
  z-index: 2;
}
.banner-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.logo-box {
  display: flex;
  align-items: center;
  gap: 14px;
}
.logo-text {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
  display: flex;
  align-items: baseline;
}
.logo-text .tm {
  font-size: 12px;
  vertical-align: super;
  color: var(--accent);
  margin-left: 2px;
  font-weight: 400;
}
.logo-text .divider {
  color: rgba(255, 255, 255, 0.3);
  margin: 0 10px;
  font-weight: 300;
}
.logo-text .biz {
  font-size: 24px;
  font-weight: 600;
  color: var(--accent);
}
.nav-menu {
  display: flex;
  gap: 36px;
  list-style: none;
}
.nav-menu a {
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.3s;
  position: relative;
  padding: 6px 0;
}
.nav-menu a:hover { color: var(--accent); }
.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s;
}
.nav-menu a:hover::after { width: 100%; }
.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 10px 24px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--accent-dark); }
.menu-toggle { display: none; background: none; border: none; cursor: pointer; }
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  margin: 5px 0;
  transition: 0.3s;
}

.banner-content {
  padding: 70px 0 90px;
}
.banner-title {
  font-size: 52px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
}
.banner-title .highlight { color: var(--accent); }
.banner-subtitle {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 36px;
  font-weight: 300;
  letter-spacing: 0.5px;
}
.banner-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}
.banner-tag {
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 30px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 14px;
  backdrop-filter: blur(10px);
}
.banner-actions {
  display: flex;
  gap: 20px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  padding: 14px 36px;
  border-radius: 4px;
  font-size: 16px;
  font-weight: 600;
  transition: all 0.3s;
}
.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.3);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  padding: 12px 34px;
  border-radius: 4px;
  font-size: 16px;
  font-weight: 600;
  transition: all 0.3s;
}
.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

/* ===== 统计数据条 ===== */
.stats-bar {
  background: var(--primary);
  padding: 30px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.stat-item {
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.stat-num span { font-size: 18px; }
.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 8px;
}

/* ===== 通用区块 ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 14px;
}
.section-title .accent { color: var(--accent); }
.section-subtitle {
  font-size: 16px;
  color: var(--text-light);
  max-width: 640px;
  margin: 0 auto;
}

/* ===== 优势区 ===== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.advantage-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  transition: all 0.3s;
}
.advantage-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.advantage-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--accent);
}
.advantage-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}
.advantage-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ===== 服务范围 ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.3s;
}
.service-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.service-img {
  height: 200px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  position: relative;
  overflow: hidden;
}
.service-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255, 107, 53, 0.15) 0%, transparent 70%);
}
.service-img .icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 56px;
  opacity: 0.9;
}
.service-body { padding: 24px; }
.service-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.service-body p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ===== 应用领域 ===== */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.industry-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.industry-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: var(--accent);
  transition: height 0.3s;
}
.industry-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.industry-card:hover::before { height: 100%; }
.industry-icon {
  font-size: 36px;
  margin-bottom: 14px;
}
.industry-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.industry-card p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ===== 案例展示 ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.case-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}
.case-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}
.case-img-wrap {
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--bg-alt);
}
.case-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.case-card:hover .case-img-wrap img { transform: scale(1.08); }
.case-body { padding: 20px 22px; }
.case-body h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.case-body p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ===== 资质认证 ===== */
.qualification-wrap {
  background: #fff;
  border-radius: var(--radius);
  padding: 50px 40px;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 50px;
  align-items: center;
}
.qualification-img {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--bg-alt);
  padding: 20px;
}
.qualification-img img {
  width: 100%;
  height: auto;
  border-radius: 4px;
}
.qualification-content h3 {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 16px;
}
.qualification-content > p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 24px;
}
.qual-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.qual-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
}
.qual-list li::before {
  content: '✓';
  width: 22px;
  height: 22px;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

/* ===== 工艺流程 ===== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  counter-reset: process;
}
.process-step {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 18px;
  text-align: center;
  position: relative;
  transition: all 0.3s;
}
.process-step:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.process-step::after {
  content: '→';
  position: absolute;
  right: -16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 20px;
  font-weight: 700;
  z-index: 2;
}
.process-step:last-child::after { display: none; }
.process-num {
  width: 44px;
  height: 44px;
  margin: 0 auto 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
}
.process-step h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}
.process-step p {
  font-size: 12px;
  color: var(--text-light);
  line-height: 1.5;
}

/* ===== FAQ 区 ===== */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s;
}
.faq-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}
.faq-q {
  padding: 18px 22px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  user-select: none;
}
.faq-q .q-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background: var(--bg-alt);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--accent);
  font-weight: 700;
  transition: transform 0.3s;
}
.faq-item.active .q-icon { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 22px;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}
.faq-item.active .faq-a {
  max-height: 300px;
  padding: 0 22px 20px;
}

/* ===== 关于我们 ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
  align-items: center;
}
.about-img {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  background: var(--bg-alt);
}
.about-img img { width: 100%; height: auto; }
.about-content h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 20px;
}
.about-content p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 16px;
}
.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 28px;
}
.about-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
}
.about-feature::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 40px;
}
.contact-info {
  background: #fff;
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}
.contact-info h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 28px;
}
.contact-list { list-style: none; }
.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.contact-list li:last-child { border-bottom: none; }
.contact-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: var(--bg-alt);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--accent);
}
.contact-detail .label {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 2px;
}
.contact-detail .value {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
}
.contact-detail .value a { color: var(--accent); }
.qr-codes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.qr-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
}
.qr-card img {
  width: 140px;
  height: 140px;
  object-fit: cover;
  margin: 0 auto 12px;
  border-radius: 8px;
}
.qr-card p {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

/* ===== 底部 ===== */
.footer {
  background: var(--primary);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brand h4 {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 16px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  list-style: none;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.3s;
}
.footer-links a:hover { color: var(--accent); }
.footer-contact li {
  font-size: 14px;
  padding: 6px 0;
  list-style: none;
}
.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
}
.footer-bottom a { color: rgba(255, 255, 255, 0.8); }
.footer-bottom a:hover { color: var(--accent); }
.footer-bottom .links { margin-top: 6px; }
.footer-bottom .links a { margin: 0 6px; }

/* ===== 滚动渐显 ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .cases-grid, .services-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(3, 1fr); }
  .process-step:nth-child(3)::after { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .qualification-wrap { grid-template-columns: 1fr; padding: 30px 24px; }
}
@media (max-width: 768px) {
  .banner-section { min-height: auto; }
  .banner-nav { flex-wrap: wrap; }
  .nav-menu {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0;
    padding-top: 16px;
  }
  .nav-menu.open { display: flex; }
  .nav-menu li { width: 100%; }
  .nav-menu a { display: block; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,0.1); }
  .menu-toggle { display: block; }
  .banner-title { font-size: 32px; }
  .banner-subtitle { font-size: 16px; }
  .banner-content { padding: 40px 0 60px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .stat-item:nth-child(2) { border-right: none; }
  .section { padding: 50px 0; }
  .section-title { font-size: 26px; }
  .cases-grid, .services-grid, .advantages-grid, .industries-grid, .faq-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .process-step::after { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .banner-actions { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .qual-list { grid-template-columns: 1fr; }
  .about-features { grid-template-columns: 1fr; }
}