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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #333;
  line-height: 1.6;
}

/* Header */
header {
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  position: sticky;
  top: 0;
  z-index: 100;
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 20px;
  font-weight: 600;
  color: #1a73e8;
  text-decoration: none;
  padding: 16px 0;
}

.logo span {
  color: #333;
  font-weight: 400;
}

nav a {
  text-decoration: none;
  color: #555;
  font-size: 15px;
  padding: 24px 16px;
  display: inline-block;
  transition: color 0.2s;
}

nav a:hover,
nav a.active {
  color: #1a73e8;
}

/* Container */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
  color: #fff;
  padding: 100px 0 80px;
}

.hero h1 {
  font-size: 36px;
  font-weight: 600;
  margin-bottom: 16px;
}

.hero p {
  font-size: 18px;
  opacity: 0.9;
  max-width: 600px;
}

/* Section */
.section {
  padding: 80px 0;
}

.section h2 {
  font-size: 28px;
  color: #1a1a1a;
  margin-bottom: 40px;
  text-align: center;
}

.section h2::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: #1a73e8;
  margin: 12px auto 0;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.card {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 32px 24px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.card .icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 18px;
  color: #1a1a1a;
  margin-bottom: 12px;
}

.card p {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
}

/* About page */
.about-hero {
  background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
  color: #fff;
  padding: 100px 0 60px;
}

.about-hero h1 {
  font-size: 36px;
  margin-bottom: 16px;
}

.about-hero p {
  font-size: 18px;
  opacity: 0.9;
}

.about-content {
  padding: 80px 0;
}

.about-intro {
  max-width: 800px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.9;
  color: #555;
}

.about-intro p {
  margin-bottom: 20px;
}

.about-values {
  padding: 60px 0 80px;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.value-item {
  text-align: center;
  padding: 24px 16px;
}

.value-item .num {
  font-size: 36px;
  font-weight: 700;
  color: #1a73e8;
  margin-bottom: 8px;
}

.value-item p {
  font-size: 14px;
  color: #666;
}

/* Footer */
footer {
  background: #1a1a2e;
  color: rgba(255,255,255,0.6);
  padding: 32px 0;
  text-align: center;
  font-size: 13px;
}

footer p {
  margin-bottom: 4px;
}