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

:root {
  --primary: #1a1a2e;
  --primary-light: #16213e;
  --accent: #0f3460;
  --accent-bright: #e94560;
  --blue: #185FA5;
  --blue-light: #E6F1FB;
  --green: #3B6D11;
  --green-light: #EAF3DE;
  --purple: #534AB7;
  --purple-light: #EEEDFE;
  --coral: #993C1D;
  --coral-light: #FAECE7;
  --text-primary: #1a1a2e;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --border: #e2e8f0;
  --bg-alt: #f8fafc;
  --white: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.7;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  transition: opacity 0.3s ease;
}

.page-loading {
  opacity: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

a { text-decoration: none; color: inherit; transition: color var(--transition); }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ===== 图片保护 ===== */
/* 禁止拖拽和选中 */
img {
  -webkit-user-drag: none;
  user-select: none;
  -webkit-user-select: none;
}
/* 透明遮罩容器 */
.img-protect {
  position: relative;
  display: block;
}
.img-protect img {
  display: block;
  width: 100%;
}
.img-protect .img-mask {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 1;
  background: transparent;
  pointer-events: auto;
}
/* 可点击容器内的遮罩：让点击穿透到父级链接 */
a > .img-protect .img-mask,
a .img-protect .img-mask,
.mega-product-card .img-mask,
.logo-img .img-mask {
  pointer-events: none;
}
/* 特殊情况：遮罩不应阻挡链接和按钮的点击 */
.img-protect a,
.img-protect button {
  position: relative;
  z-index: 2;
}

/* ===== SECTION UTILITIES ===== */
.section { padding: 80px 0; }
.bg-alt { background: var(--bg-alt); }

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  background: var(--blue-light);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}
.section-title {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 14px;
  line-height: 1.3;
}
.section-desc {
  color: var(--text-secondary);
  font-size: 16px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition);
  cursor: pointer;
  border: 1.5px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--primary); border-color: var(--primary); }
.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-outline:hover { background: var(--accent); color: var(--white); }
.btn-white {
  background: var(--white);
  color: var(--accent);
  border-color: var(--white);
}
.btn-white:hover { background: rgba(255,255,255,0.9); }
.btn-full { width: 100%; justify-content: center; }

/* ===== NAVBAR (已移至 navbar.css，此处保留占位) ===== */
/* .navbar .nav-links .nav-cta .menu-toggle 等规则均在 navbar.css 中 */


/* ===== HERO ===== */
.hero {
  padding: 120px 0 80px;
  background: linear-gradient(135deg, #f8faff 0%, #eef2ff 100%);
  display: flex;
  align-items: center;
  min-height: 100vh;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -100px; right: -100px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(15,52,96,0.06) 0%, transparent 70%);
  border-radius: 50%;
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: 1200px;
  width: 100%;
  padding: 0 24px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--blue);
  background: var(--blue-light);
  border: 1px solid rgba(24,95,165,0.2);
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}
.hero-title {
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.hero-title .highlight {
  background: linear-gradient(135deg, #0f3460, #185FA5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 380px;
}
.grid-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.grid-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card-icon { font-size: 32px; margin-bottom: 10px; }
.card-label { font-size: 13px; font-weight: 500; color: var(--text-secondary); }
.card-1 { border-top: 3px solid #185FA5; }
.card-2 { border-top: 3px solid #3B6D11; }
.card-3 { border-top: 3px solid #534AB7; }
.card-4 { border-top: 3px solid #993C1D; }

/* ===== STATS ===== */
.stats { background: var(--accent); padding: 48px 0; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 20px;
  border-right: 1px solid rgba(255,255,255,0.15);
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: 44px;
  font-weight: 800;
  color: white;
  line-height: 1;
  margin-bottom: 6px;
}
.stat-num span { font-size: 26px; }
.stat-label { font-size: 14px; color: rgba(255,255,255,0.7); }

/* ===== SERVICES GRID ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.service-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.service-card:hover::after { transform: scaleX(1); }
.service-card.featured {
  border-color: var(--accent);
  background: linear-gradient(135deg, #f0f4ff 0%, #fff 100%);
}
.service-badge {
  position: absolute;
  top: 16px; right: 16px;
  font-size: 11px;
  font-weight: 600;
  color: white;
  background: var(--accent-bright);
  padding: 2px 10px;
  border-radius: 20px;
}
.service-icon {
  width: 56px; height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.s1 { background: var(--blue-light); color: var(--blue); }
.s2 { background: var(--purple-light); color: var(--purple); }
.s3 { background: var(--green-light); color: var(--green); }
.s4 { background: var(--coral-light); color: var(--coral); }
.service-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 10px; }
.service-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.service-link { font-size: 13px; color: var(--blue); font-weight: 500; }
.service-link:hover { color: var(--accent); }

/* ===== WHY US ===== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.why-item {
  padding: 32px 24px;
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.why-num {
  font-size: 40px;
  font-weight: 800;
  color: rgba(15,52,96,0.1);
  line-height: 1;
  margin-bottom: 12px;
}
.why-item h3 { font-size: 15px; font-weight: 600; margin-bottom: 8px; }
.why-item p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

/* ===== CASES ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow var(--transition);
}
.case-card:hover { box-shadow: var(--shadow-md); }
.case-industry {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue);
  background: var(--blue-light);
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 12px;
}
.case-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 10px; }
.case-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 14px; }
.case-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.case-tags span {
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ===== PRODUCTS SHOWCASE ===== */
.products-section .container {
  max-width: 1800px;
  padding: 0 20px;
}
.products-section {
  background: #0f1117;
  padding: 80px 0;
}
.products-section .section-title { color: #fff !important; }
.products-section .section-desc { color: rgba(255,255,255,0.55) !important; }
.products-section .section-tag {
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.7);
  border: 1px solid rgba(255,255,255,0.1);
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.product-card {
  display: block;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  padding: 16px;
  transition: all 0.25s ease;
  text-decoration: none;
  color: inherit;
}
.product-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.12);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}
.product-visual {
  background: rgba(255,255,255,0.06);
  border-radius: 12px;
  aspect-ratio: 1/1;
  overflow: hidden;
  position: relative;
}
.product-icon-wrap {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 48px;
  line-height: 1;
  opacity: 0.85;
}
.product-img-wrap {
  width: 100%;
  height: 100%;
}
.product-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-info h3 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
  letter-spacing: 0.02em;
  text-align: center;
}
.product-info p {
  font-size: 12px;
  color: rgba(255,255,255,0.45);
  line-height: 1.5;
  text-align: center;
}

/* ===== CTA SECTION ===== */
.cta-section {
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  padding: 80px 0;
}
.cta-inner {
  text-align: center;
  color: white;
}
.cta-inner h2 { font-size: 34px; font-weight: 700; margin-bottom: 12px; }
.cta-inner p { font-size: 16px; opacity: 0.8; margin-bottom: 32px; }

/* ===== FOOTER ===== */
.footer {
  background: var(--primary);
  color: rgba(255,255,255,0.7);
  padding-top: 64px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .logo-text { color: white; font-size: 16px; }
.footer-brand p { font-size: 13px; line-height: 1.8; }
.footer-links h4, .footer-contact h4 {
  color: white;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.footer-links ul li { margin-bottom: 8px; }
.footer-links a { font-size: 13px; transition: color var(--transition); }
.footer-links a:hover { color: white; }
.footer-contact p { font-size: 13px; margin-bottom: 8px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 18px 0;
}
.footer-bottom p { font-size: 12px; text-align: center; }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: white; }
.footer-icp { margin-top: 6px; font-size: 12px; text-align: center; }
.footer-icp a { color: rgba(255,255,255,0.4); text-decoration: none; transition: color var(--transition); }
.footer-icp a:hover { color: rgba(255,255,255,0.7); }

/* ===== PAGE HERO ===== */
.page-hero {
  padding: 120px 0 64px;
  background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 100%);
  border-bottom: 1px solid var(--border);
}
.page-hero-content { max-width: 640px; }
.breadcrumb { font-size: 13px; color: var(--text-muted); margin-bottom: 16px; }
.breadcrumb a { color: var(--blue); }
.page-hero h1 { font-size: 42px; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 12px; }
.page-hero p { font-size: 16px; color: var(--text-secondary); }

/* ===== ABOUT PAGE ===== */
.about-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.about-text .section-tag { margin-bottom: 12px; }
.about-text h2 { font-size: 30px; font-weight: 700; margin-bottom: 20px; }
.about-text p { color: var(--text-secondary); margin-bottom: 16px; line-height: 1.8; }
.about-stats-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.about-stat { text-align: center; padding: 24px 0; }
.divider-h { height: 1px; background: var(--border); }
.big-num {
  display: block;
  font-size: 46px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}
.big-num sup { font-size: 24px; }
.num-label { font-size: 13px; color: var(--text-muted); }

/* ===== MVV ===== */
.mvv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.mvv-card {
  padding: 36px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.mvv-card.mission { background: white; border-top: 3px solid var(--blue); }
.mvv-card.vision { background: white; border-top: 3px solid var(--purple); }
.mvv-card.values { background: white; border-top: 3px solid var(--green); }
.mvv-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.mvv-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.mvv-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }

/* ===== TIMELINE ===== */
.timeline-list { max-width: 720px; margin: 0 auto; }
.timeline-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  margin-bottom: 0;
  position: relative;
}
.timeline-item + .timeline-item { margin-top: 0; }
.timeline-item + .timeline-item::before {
  content: '';
  position: absolute;
  left: 39px; top: 0;
  bottom: 0; width: 2px;
  background: var(--border);
  z-index: 0;
}
.timeline-year {
  font-size: 14px;
  font-weight: 700;
  color: var(--blue);
  padding-top: 20px;
  text-align: right;
  position: relative;
  z-index: 1;
}
.timeline-year::after {
  content: '';
  position: absolute;
  right: -13px; top: 26px;
  width: 10px; height: 10px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid white;
  box-shadow: 0 0 0 3px rgba(15,52,96,0.15);
}
.timeline-content {
  padding: 16px 0 32px 20px;
}
.timeline-content h3 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.timeline-content p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

/* ===== TEAM ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.team-card {
  text-align: center;
  padding: 32px 20px;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: box-shadow var(--transition);
}
.team-card:hover { box-shadow: var(--shadow-md); }
.team-avatar {
  width: 72px; height: 72px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  margin: 0 auto 16px;
}
.team-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.team-role { font-size: 12px; color: var(--text-muted); margin-bottom: 12px; }
.team-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

/* ===== SERVICES PAGE ===== */
.service-nav-section {
  background: white;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 68px;
  z-index: 100;
}
.service-nav {
  display: flex;
  gap: 4px;
  padding: 12px 0;
}
.snav-btn {
  padding: 8px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  border-radius: 6px;
  transition: all var(--transition);
  font-weight: 500;
}
.snav-btn:hover, .snav-btn.active {
  color: var(--accent);
  background: var(--blue-light);
}
.service-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.service-detail-grid.reverse { direction: rtl; }
.service-detail-grid.reverse > * { direction: ltr; }
.service-detail-content .section-tag { margin-bottom: 12px; }
.service-detail-content h2 { font-size: 30px; font-weight: 700; margin-bottom: 16px; }
.service-detail-content p { color: var(--text-secondary); margin-bottom: 20px; line-height: 1.8; }
.feature-list { margin-bottom: 28px; }
.feature-list li {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  padding-left: 20px;
  position: relative;
}
.feature-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--blue);
  font-size: 12px;
}

/* Tech Stack */
.tech-stack {
  background: var(--primary);
  border-radius: var(--radius);
  padding: 32px;
}
.tech-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }
.tech-tag {
  font-size: 12px;
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 5px 12px;
  border-radius: 5px;
}
.tech-label { color: rgba(255,255,255,0.4); font-size: 12px; margin-top: 8px; }

/* AI Showcase */
.ai-showcase { display: flex; flex-direction: column; gap: 12px; }
.ai-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: box-shadow var(--transition);
}
.ai-card:hover { box-shadow: var(--shadow-sm); }
.ai-icon { font-size: 24px; flex-shrink: 0; }
.ai-img { width: 56px; height: 56px; flex-shrink: 0; border-radius: 10px; overflow: hidden; background: #f1f5f9; }
.ai-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.ai-title { font-size: 14px; font-weight: 600; margin-bottom: 2px; }
.ai-desc { font-size: 12px; color: var(--text-muted); }

/* Cloud Arch */
.cloud-arch { display: flex; flex-direction: column; align-items: center; gap: 0; }
.arch-layer {
  width: 100%;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  text-align: center;
}
.arch-label { font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px; }
.arch-items { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.arch-items span {
  font-size: 12px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 4px;
  color: var(--text-secondary);
}
.cloud-layer span { background: var(--blue-light); border-color: rgba(24,95,165,0.2); color: var(--blue); }
.arch-arrow { font-size: 18px; color: var(--text-muted); padding: 6px 0; }

/* Data Visual */
.data-visual { display: flex; flex-direction: column; gap: 24px; }
.data-flow { display: flex; align-items: center; gap: 8px; }
.df-node {
  flex: 1;
  text-align: center;
  padding: 16px 8px;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
}
.df-node small { display: block; font-size: 11px; color: var(--text-muted); font-weight: 400; margin-top: 4px; }
.df-arrow { color: var(--text-muted); font-size: 20px; flex-shrink: 0; }
.df-node.etl { border-color: var(--accent); background: #f0f4ff; }
.data-metrics { background: white; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.dm-item { margin-bottom: 16px; }
.dm-item:last-child { margin-bottom: 0; }
.dm-bar {
  height: 6px;
  background: var(--accent);
  border-radius: 3px;
  margin-bottom: 6px;
  transition: width 1s ease;
}
.dm-label { font-size: 12px; color: var(--text-secondary); }

/* Process Steps */
.process-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
}
.process-step {
  text-align: center;
  padding: 24px 20px;
  flex: 1;
  max-width: 180px;
}
.step-num {
  width: 44px; height: 44px;
  background: var(--accent);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  margin: 0 auto 12px;
}
.process-step h3 { font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.process-step p { font-size: 12px; color: var(--text-secondary); line-height: 1.6; }
.process-connector {
  width: 60px;
  height: 2px;
  background: var(--border);
  margin-top: 42px;
  flex-shrink: 0;
}

/* ===== CONTACT PAGE ===== */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.contact-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: box-shadow var(--transition);
}
.contact-card:hover { box-shadow: var(--shadow-md); }
.contact-card-icon {
  width: 56px; height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.contact-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.contact-card p { font-size: 13px; color: var(--text-secondary); }
.contact-hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* Contact Form */
.contact-form-container {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 64px;
  align-items: start;
}
.contact-form-info .section-tag { margin-bottom: 12px; }
.contact-form-info h2 { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
.contact-form-info p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 28px; }
.form-promises { display: flex; flex-direction: column; gap: 10px; }
.promise-item { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-secondary); }
.promise-icon { color: var(--green); font-weight: 700; }

.contact-form-wrapper {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}
.contact-form { display: flex; flex-direction: column; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; font-weight: 500; color: var(--text-primary); }
.required { color: var(--accent-bright); }
.form-group input, .form-group select, .form-group textarea {
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--text-primary);
  transition: border-color var(--transition);
  background: white;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 12px; color: var(--text-muted); text-align: center; margin-top: 4px; }
.form-note a { color: var(--blue); }

.form-success { text-align: center; padding: 40px 20px; }
.success-icon {
  width: 60px; height: 60px;
  background: var(--green-light);
  color: var(--green);
  font-size: 28px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.form-success h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.form-success p { color: var(--text-secondary); margin-bottom: 24px; font-size: 14px; }

/* Offices */
.offices-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.office-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.office-card.hq { border-top: 3px solid var(--accent); }
.office-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue);
  margin-bottom: 8px;
}
.office-card h3 { font-size: 24px; font-weight: 700; margin-bottom: 10px; }
.office-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }
.office-contact { margin-top: 14px; font-weight: 500; color: var(--text-primary) !important; }

/* FAQ */
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-question {
  width: 100%;
  text-align: left;
  padding: 18px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--blue); }
.faq-arrow {
  font-size: 20px;
  color: var(--text-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
  line-height: 1;
}
.faq-item.open .faq-arrow { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-item.open .faq-answer { max-height: 200px; }
.faq-answer p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; padding-bottom: 18px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .section { padding: 56px 0; }
  .section-title { font-size: 26px; }
  .about-intro-grid { grid-template-columns: 1fr; }
  .service-detail-grid { grid-template-columns: 1fr; }
  .service-detail-grid.reverse { direction: ltr; }
  .cases-grid { grid-template-columns: 1fr; }
  .contact-form-container { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: repeat(2, 1fr); }
  .offices-grid { grid-template-columns: 1fr; }
  .mvv-grid { grid-template-columns: 1fr; }
  .process-steps { flex-direction: column; align-items: center; }
  .process-connector { width: 2px; height: 30px; margin: 0; }
  /* 导航栏响应式规则已移至 navbar.css，此处不再重复 */
  .footer-inner { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .news-preview-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
}

/* ===== 首页新闻动态预览 ===== */
.news-preview-section { padding: 48px 0; }
.news-preview-section .container { max-width: 1800px; }
.news-preview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
@media (max-width: 1100px) {
  .news-preview-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .news-preview-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .news-preview-grid { grid-template-columns: 1fr; }
}
.news-preview-card {
  display: block;
  text-decoration: none;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}
.news-preview-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.news-preview-body { padding: 12px 14px 14px; }
.news-preview-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.news-preview-cat {
  font-size: 11px;
  font-weight: 600;
  color: var(--blue);
  background: var(--blue-light);
  padding: 2px 8px;
  border-radius: 4px;
}
.news-preview-date { font-size: 12px; color: var(--text-muted); }
.news-preview-title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-preview-summary {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
/* btn-outline 样式（查看全部按钮）*/
.btn-outline {
  display: inline-block;
  padding: 10px 28px;
  border: 2px solid var(--blue);
  color: var(--blue);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.btn-outline:hover {
  background: var(--blue);
  color: #fff;
}