:root {
  --primary: #0f5bff;
  --primary-dark: #0a3fa8;
  --accent: #ff8a00;
  --dark: #0b1526;
  --dark-2: #12203a;
  --text: #2a3242;
  --text-light: #6b7385;
  --bg: #ffffff;
  --bg-soft: #f5f8fd;
  --border: #e8edf5;
  --radius: 16px;
  --shadow: 0 10px 40px rgba(11, 21, 38, 0.08);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-block;
  padding: 13px 32px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  border: none;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 24px rgba(15, 91, 255, 0.35);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-ghost {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.5);
}
.btn-ghost:hover { background: rgba(255,255,255,0.12); }
.btn-sm { padding: 9px 22px; font-size: 14px; }
.btn-lg { padding: 16px 40px; font-size: 17px; }

/* ===== 导航 ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s;
}
.nav.scrolled { box-shadow: 0 4px 20px rgba(11,21,38,0.08); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 42px; height: 42px;
  background: var(--primary);
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text strong { font-size: 18px; color: var(--dark); }
.logo-text em { font-size: 12px; color: var(--text-light); font-style: normal; }

.nav-links { display: flex; gap: 30px; }
.nav-links a {
  font-size: 15px;
  color: var(--text);
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--primary);
  transition: width 0.3s;
}
.nav-links a:hover { color: var(--primary); }
.nav-links a:hover::after { width: 100%; }

.menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 26px;
  cursor: pointer;
  color: var(--dark);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
  padding: 120px 0 80px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #0b1526 0%, #12203a 40%, #0f5bff 130%);
}
.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.08) 0, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(15,91,255,0.4) 0, transparent 50%);
}
.hero-inner { position: relative; z-index: 1; }
.hero-eyebrow {
  display: inline-block;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 14px;
  letter-spacing: 1px;
  margin-bottom: 24px;
}
.hero-title {
  font-size: 56px;
  line-height: 1.2;
  font-weight: 800;
  margin-bottom: 24px;
}
.hero-sub {
  font-size: 18px;
  color: rgba(255,255,255,0.85);
  max-width: 640px;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 16px; margin-bottom: 56px; }
.hero-stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; }
.stat-num {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
}
.stat-label { font-size: 14px; color: rgba(255,255,255,0.7); }

/* ===== 通用 section ===== */
.section { padding: 90px 0; }
.section-head { margin-bottom: 52px; }
.section-head.light .section-title,
.section-head.light .section-desc { color: #fff; }
.section-eyebrow {
  display: inline-block;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.section-head.light .section-eyebrow { color: var(--accent); }
.section-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 12px;
}
.section-desc { font-size: 16px; color: var(--text-light); max-width: 640px; }

/* ===== 关于 ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: center;
}
.about-text .lead {
  font-size: 18px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 16px;
  line-height: 1.8;
}
.about-text p { color: var(--text-light); margin-bottom: 16px; }
.about-list { margin-top: 16px; }
.about-list li {
  padding: 8px 0 8px 28px;
  position: relative;
  color: var(--text);
}
.about-list li::before {
  content: '✓';
  position: absolute;
  left: 0; top: 8px;
  color: var(--primary);
  font-weight: 700;
}
.about-card {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.about-card-item { display: flex; flex-direction: column; }
.about-card-item .num {
  font-size: 34px;
  font-weight: 800;
  color: var(--primary);
}
.about-card-item .desc { font-size: 14px; color: var(--text-light); }

/* ===== 业务 ===== */
.service { background: var(--dark); }
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--dark-2);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: all 0.3s;
}
.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  box-shadow: 0 16px 40px rgba(15,91,255,0.25);
}
.service-icon {
  width: 56px; height: 56px;
  background: rgba(15,91,255,0.15);
  color: var(--primary);
  font-size: 24px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.service-card h3 { color: #fff; font-size: 20px; margin-bottom: 16px; }
.service-card ul li {
  color: rgba(255,255,255,0.7);
  padding: 6px 0 6px 20px;
  position: relative;
  font-size: 14px;
}
.service-card ul li::before {
  content: '';
  position: absolute;
  left: 0; top: 14px;
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

/* ===== 软件开发与数字化设计 ===== */
.software { background: var(--bg-soft); }
.software-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.software-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
  border-top: 4px solid var(--primary);
}
.software-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(15,91,255,0.15);
}
.software-card .software-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.software-card h3 {
  font-size: 20px;
  color: var(--dark);
  margin-bottom: 14px;
}
.software-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}
.software-team {
  margin-top: 32px;
  background: linear-gradient(135deg, #0f5bff 0%, #0a3fa8 100%);
  border-radius: var(--radius);
  padding: 32px 36px;
  color: rgba(255,255,255,0.92);
}
.software-team p {
  font-size: 15px;
  line-height: 1.9;
  max-width: 900px;
}
.software-team strong { color: #fff; }

/* ===== 专业能力 ===== */
.strength-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.strength-block {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow);
}
.strength-block h3 {
  font-size: 20px;
  color: var(--dark);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--bg-soft);
}
.strength-sub { margin-bottom: 20px; }
.strength-sub:last-child { margin-bottom: 0; }
.strength-sub strong {
  display: block;
  color: var(--primary);
  font-size: 15px;
  margin-bottom: 8px;
}
.strength-sub p { font-size: 14px; color: var(--text-light); }

/* ===== 品质 ===== */
.quality { background: linear-gradient(135deg, #0f5bff 0%, #0a3fa8 100%); }
.quality-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.quality-card {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  padding: 36px 32px;
  backdrop-filter: blur(6px);
}
.quality-num {
  display: inline-block;
  font-size: 40px;
  font-weight: 800;
  color: rgba(255,255,255,0.25);
  margin-bottom: 12px;
}
.quality-card h3 { color: #fff; font-size: 22px; margin-bottom: 20px; }
.quality-card ul li {
  color: rgba(255,255,255,0.85);
  padding: 7px 0 7px 20px;
  position: relative;
  font-size: 14px;
}
.quality-card ul li::before {
  content: '';
  position: absolute;
  left: 0; top: 15px;
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
}
.quality-card strong { color: #fff; }

/* ===== 客户 ===== */
.clients-logos {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.client-logo {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-light);
  transition: all 0.3s;
}
.client-logo:hover { color: var(--primary); border-color: var(--primary); }

/* ===== 联系 ===== */
.contact { background: var(--bg-soft); }
.contact-box {
  background: #fff;
  border-radius: 24px;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
}
.contact-info { padding: 52px; }
.contact-info h2 { font-size: 32px; font-weight: 800; color: var(--dark); margin-bottom: 12px; }
.contact-desc { color: var(--text-light); margin-bottom: 32px; }
.contact-item {
  display: flex;
  flex-direction: column;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.contact-item .label {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 4px;
}
.contact-item .value { font-size: 17px; font-weight: 600; color: var(--dark); }
.contact-item .value a { color: var(--primary); }
.contact-info .btn-lg { margin-top: 32px; }
.contact-map {
  background: linear-gradient(135deg, #12203a, #0b1526);
  display: flex;
  align-items: center;
  justify-content: center;
}
.map-placeholder {
  text-align: center;
  color: #fff;
}
.map-pin { font-size: 52px; margin-bottom: 16px; }
.map-placeholder p { font-size: 22px; font-weight: 700; }
.map-note { font-size: 15px; color: rgba(255,255,255,0.7); font-weight: 400; margin-top: 8px; }

/* 地图图片模式 */
.map-image-wrap {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
.map-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.map-image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11,21,38,0.85) 0%, rgba(11,21,38,0.3) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 30px 20px;
  color: #fff;
  text-align: center;
}
.map-image-overlay .map-pin { font-size: 38px; margin-bottom: 8px; }
.map-image-overlay p { font-size: 18px; font-weight: 700; }

/* ===== 页脚 ===== */
.footer { background: var(--dark); color: rgba(255,255,255,0.7); }
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  padding: 60px 24px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand .logo-text strong,
.footer-brand .logo-text em { color: #fff; }
.footer-brand p { font-size: 14px; }
.footer-nav { display: flex; flex-direction: column; gap: 12px; }
.footer-nav a { font-size: 14px; transition: color 0.3s; }
.footer-nav a:hover { color: #fff; }
.footer-contact p { font-size: 14px; margin-bottom: 8px; }
.footer-contact a { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  padding: 20px 24px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transform: translateY(-120%);
    transition: transform 0.3s;
  }
  .nav-links.open { transform: translateY(0); }
  .menu-btn { display: block; }
  .nav-cta { display: none; }
  .hero-title { font-size: 40px; }
  .hero-stats { gap: 28px; }
  .about-grid, .quality-grid, .contact-box { grid-template-columns: 1fr; }
  .service-grid, .strength-grid { grid-template-columns: 1fr; }
  .software-grid { grid-template-columns: 1fr; }
  .clients-logos { grid-template-columns: 1fr 1fr; }
  .contact-map { min-height: 280px; }
  .footer-inner { flex-direction: column; gap: 28px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 32px; }
  .stat-num { font-size: 26px; }
  .section-title { font-size: 28px; }
  .contact-info { padding: 32px 24px; }
  .clients-logos { grid-template-columns: 1fr; }
}