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

:root {
  --deep-blue: #06102A;
  --navy: #0A1F4A;
  --primary-blue: #1B5FDC;
  --accent-blue: #3B8CFF;
  --light-blue: #5DADE2;
  --pale-blue: #D6EAF8;
  --bg-light: #F3F7FD;
  --bg-white: #FFFFFF;
  --text-dark: #1A202C;
  --text-gray: #4A5568;
  --text-light: #A0AEC0;
  --text-white: #FFFFFF;
  --card-shadow: 0 4px 20px rgba(6, 16, 42, 0.08);
  --card-shadow-hover: 0 12px 40px rgba(6, 16, 42, 0.18);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--text-dark);
  background: var(--bg-white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ===== Nav ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(6, 16, 42, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(59, 140, 255, 0.15);
  display: flex;
  align-items: center;
  padding: 0 60px;
  transition: background var(--transition);
}
.nav.scrolled { background: rgba(6, 16, 42, 0.98); }
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.nav-logo {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-blue), var(--light-blue));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: #fff;
}
.nav-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: 1px;
}
.nav-links {
  display: flex;
  gap: 36px;
  margin-left: auto;
  align-items: center;
}
.nav-links a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}
.nav-links a:hover { color: var(--text-white); }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--accent-blue);
  transform: scaleX(0);
  transition: transform var(--transition);
  border-radius: 1px;
}
.nav-links a:hover::after { transform: scaleX(1); }

/* ===== Hero ===== */
.hero {
  position: relative;
  height: 300px;
  background: var(--deep-blue);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(27, 95, 220, 0.25) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 60%, rgba(59, 140, 255, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(93, 173, 226, 0.1) 0%, transparent 40%);
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 140, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 140, 255, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent-blue);
  border-radius: 50%;
  opacity: 0;
  animation: floatUp 6s infinite;
}
@keyframes floatUp {
  0% { transform: translateY(0) scale(0); opacity: 0; }
  20% { opacity: 0.8; }
  50% { opacity: 0.3; }
  100% { transform: translateY(-400px) scale(1); opacity: 0; }
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
}
.hero-studio {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent-blue);
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 20px;
  animation: fadeInDown 0.8s ease;
}
.hero-typewriter {
  font-size: 72px;
  font-weight: 800;
  color: var(--text-white);
  font-family: "SF Mono", "Fira Code", "Consolas", "Microsoft YaHei", monospace;
  letter-spacing: 2px;
  margin-bottom: 16px;
  min-height: 86px;
}
.hero-typewriter .cursor {
  display: inline-block;
  width: 4px;
  height: 64px;
  background: var(--accent-blue);
  margin-left: 4px;
  vertical-align: middle;
  animation: blink 0.8s infinite;
}
@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}
.hero-subtitle {
  font-size: 16px;
  color: rgba(255,255,255,0.6);
  font-weight: 400;
  letter-spacing: 1px;
  animation: fadeInUp 0.8s ease 0.3s both;
}
.hero-scroll-hint {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: bounceDown 2s infinite;
}
.hero-scroll-hint span {
  display: block;
  width: 24px;
  height: 24px;
  border-right: 2px solid rgba(255,255,255,0.4);
  border-bottom: 2px solid rgba(255,255,255,0.4);
  transform: rotate(45deg);
}
@keyframes bounceDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Section Shared ===== */
.section { position: relative; }
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ===== About / Intro Section ===== */
.intro {
  padding: 80px 0;
  background: var(--bg-white);
  min-height: 450px;
}
.intro-grid {
  display: flex;
  gap: 64px;
  align-items: center;
}
.intro-text { flex: 1; }
.intro-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-blue);
  background: var(--pale-blue);
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 2px;
  margin-bottom: 20px;
}
.intro-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--deep-blue);
  margin-bottom: 24px;
  line-height: 1.3;
}
.intro-desc {
  font-size: 15px;
  color: var(--text-gray);
  line-height: 1.9;
}
.intro-desc p + p { margin-top: 14px; }
.intro-visual {
  flex: 1;
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.intro-monitor {
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  background: var(--navy);
  border-radius: var(--radius-lg);
  padding: 12px;
  box-shadow: 0 20px 60px rgba(6, 16, 42, 0.2);
  position: relative;
}
.intro-monitor-top {
  height: 24px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 8px;
  margin-bottom: 8px;
}
.intro-monitor-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.intro-monitor-dot:nth-child(1) { background: #FF5F57; }
.intro-monitor-dot:nth-child(2) { background: #FFBD2E; }
.intro-monitor-dot:nth-child(3) { background: #28CA41; }
.intro-monitor-screen {
  background: #0D1B2A;
  border-radius: var(--radius-sm);
  padding: 24px;
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  font-size: 13px;
  line-height: 1.8;
  color: var(--light-blue);
  overflow: hidden;
  position: relative;
  min-height: 240px;
}
.code-line {
  display: flex;
  gap: 12px;
}
.code-line-num {
  color: rgba(93, 173, 226, 0.3);
  min-width: 24px;
  text-align: right;
  user-select: none;
}
.code-keyword { color: #C792EA; }
.code-string { color: #C3E88D; }
.code-func { color: #82AAFF; }
.code-comment { color: #546E7A; }
.code-type { color: #FFCB6B; }
.code-var { color: #EEFFFF; }
.code-punctuation { color: #89DDFF; }

/* ===== Products Section ===== */
.products {
  padding: 80px 0 100px;
  background: var(--bg-light);
}
.products-header {
  text-align: center;
  margin-bottom: 56px;
}
.products-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-blue);
  background: rgba(27, 95, 220, 0.08);
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 2px;
  margin-bottom: 16px;
}
.products-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--deep-blue);
  margin-bottom: 12px;
}
.products-subtitle {
  font-size: 15px;
  color: var(--text-gray);
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-card {
  position: relative;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--card-shadow);
  text-decoration: none;
  color: inherit;
  display: block;
}
.product-card:hover {
  transform: scale(1.04);
  box-shadow: var(--card-shadow-hover);
}
.product-card-img {
  width: 100%;
  height: 200px;
  position: relative;
  overflow: hidden;
}
.product-card-img-inner {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
  display: block;
}
.product-card:hover .product-card-img-inner { transform: scale(1.1); }
.product-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(6, 16, 42, 0.7) 0%, transparent 60%);
}
.product-card-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 12px;
  letter-spacing: 1px;
}
.product-card-badge.erp { background: rgba(27,95,220,0.9); color: #fff; }
.product-card-badge.his { background: rgba(46,139,87,0.9); color: #fff; }
.product-card-badge.crm { background: rgba(154,18,179,0.85); color: #fff; }
.product-card-badge.rpa { background: rgba(218,119,22,0.9); color: #fff; }
.product-card-badge.ecom { background: rgba(220,38,38,0.9); color: #fff; }
.product-card-badge.mobile { background: rgba(8,145,178,0.9); color: #fff; }
.product-card-body {
  padding: 20px 24px 24px;
}
.product-card-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--deep-blue);
  margin-bottom: 6px;
  line-height: 1.4;
}
.product-card-desc {
  font-size: 13px;
  color: var(--text-gray);
  line-height: 1.6;
}
.product-card-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
}
.product-card-tag {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 4px;
  background: var(--bg-light);
  color: var(--primary-blue);
  font-weight: 500;
}

/* ===== Service Section ===== */
.service {
  padding: 50px 0 60px;
  background: var(--bg-white);
}
.service-header {
  text-align: center;
  margin-bottom: 40px;
}
.service-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-blue);
  background: rgba(27, 95, 220, 0.08);
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.service-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--deep-blue);
}
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--bg-light);
  border-radius: var(--radius-md);
  padding: 32px 20px 28px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: default;
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-blue));
  opacity: 0;
  transition: opacity var(--transition);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 30px rgba(6,16,42,0.12);
  border-color: var(--pale-blue);
}
.service-card:hover::before { opacity: 1; }
.service-card-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 18px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
}
.service-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--deep-blue);
  margin-bottom: 10px;
}
.service-card-desc {
  font-size: 13px;
  color: var(--text-gray);
  line-height: 1.7;
}

/* ===== Footer ===== */
.footer {
  background: var(--deep-blue);
  padding: 48px 0 28px;
  position: relative;
  overflow: hidden;
}
.footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(59,140,255,0.3), transparent);
}
.footer::after {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(59,140,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.footer-grid {
  display: flex;
  gap: 80px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  position: relative;
  z-index: 1;
}
.footer-brand-col { flex: 1.5; }
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-blue), var(--light-blue));
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 800;
  color: #fff;
}
.footer-name { font-size: 16px; font-weight: 700; color: var(--text-white); }
.footer-tagline {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  line-height: 2.2;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent-blue); }

/* ===== 微信二维码悬浮窗 ===== */
.footer-wechat { position: relative; }
.wechat-qr {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 8px;
  width: 150px;
  background: #fff;
  border-radius: var(--radius-md);
  padding: 10px;
  box-shadow: 0 12px 40px rgba(6, 16, 42, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 100;
}
/* 桥接区域：填补链接与浮窗之间的空隙，避免鼠标移动时浮窗闪烁消失 */
.wechat-qr::after {
  content: '';
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}
/* 指向链接的小箭头 */
.wechat-qr::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 24px;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 6px solid #fff;
}
.footer-wechat:hover .wechat-qr,
.footer-wechat:focus-within .wechat-qr {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.wechat-qr img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 140px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}
.wechat-qr-cap {
  display: block;
  text-align: center;
  font-size: 12px;
  color: var(--text-gray);
  margin-top: 6px;
  line-height: 1.4;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  flex-wrap: wrap;
  gap: 12px;
  position: relative;
  z-index: 1;
}
.footer-copyright {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}
.footer-beian {
  font-size: 12px;
  color: rgba(255,255,255,0.35);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-beian:hover { color: rgba(255,255,255,0.6); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .intro-grid { flex-direction: column; gap: 40px; }
  .footer-grid { flex-wrap: wrap; gap: 40px; }
  .hero-typewriter { font-size: 48px; }
  .nav { padding: 0 24px; }
  .nav-links { gap: 20px; }
}
@media (max-width: 640px) {
  .products-grid { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: 1fr; }
  .section-inner { padding: 0 20px; }
  .hero-typewriter { font-size: 32px; min-height: 44px; }
  .hero-typewriter .cursor { height: 28px; width: 3px; }
  .hero { height: 260px; }
  .intro { padding: 48px 0; }
  .intro-title { font-size: 24px; }
  .products { padding: 48px 0; }
  .products-title { font-size: 24px; }
  .hero-studio { font-size: 13px; letter-spacing: 2px; }
  .nav-links a:not(:last-child) { display: none; }
  .footer-bottom { flex-direction: column; text-align: center; }
}