/* Google Chrome V13 - Warm & Creative Official Style */
:root {
  --warm-bg: #fffcf5; /* 奶油黄背景 */
  --warm-card: #ffffff;
  --warm-primary: #fbbc05; /* 谷歌黄 */
  --warm-accent: #e37400; /* 日落橙 */
  --warm-red: #ea4335;
  --warm-green: #34a853;
  --warm-blue: #4285f4;
  --text-main: #3c4043;
  --text-soft: #5f6368;
  --border-warm: #f1e4d1;
  --radius-soft: 28px;
  --shadow-warm: 0 12px 32px rgba(227, 116, 0, 0.08);
  --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

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

body {
  font-family: 'Google Sans', 'Inter', system-ui, sans-serif;
  background-color: var(--warm-bg);
  color: var(--text-main);
  line-height: 1.6;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; }

/* Warm Navbar */
.navbar-v13 {
  height: 80px;
  background: rgba(255, 252, 245, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-warm);
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-logo-v13 { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 600; font-size: 22px; color: var(--text-main); }
.nav-links-v13 { display: flex; gap: 36px; margin-left: 60px; }
.nav-link-v13 { text-decoration: none; color: var(--text-soft); font-size: 15px; font-weight: 500; transition: var(--transition); }
.nav-link-v13:hover, .nav-link-v13.active { color: var(--warm-accent); }

/* Warm Hero */
.hero-v13 {
  padding: 120px 0 100px;
  text-align: center;
  background: radial-gradient(circle at center, #fff 0%, var(--warm-bg) 100%);
}

.hero-title-v13 {
  font-size: 64px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
  letter-spacing: -1.5px;
}

.hero-subtitle-v13 {
  font-size: 20px;
  color: var(--text-soft);
  max-width: 700px;
  margin: 0 auto 48px;
}

/* Warm Cards */
.card-v13 {
  background: var(--warm-card);
  padding: 40px;
  border-radius: var(--radius-soft);
  border: 1px solid var(--border-warm);
  transition: var(--transition);
}
.card-v13:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-warm);
  border-color: var(--warm-primary);
}

/* Buttons */
.btn-warm {
  display: inline-block;
  padding: 16px 40px;
  background: var(--warm-primary);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  border-radius: 100px;
  transition: var(--transition);
}
.btn-warm:hover {
  background: var(--warm-accent);
  box-shadow: 0 8px 20px rgba(227, 116, 0, 0.2);
}

.btn-warm-outline {
  display: inline-block;
  padding: 15px 39px;
  border: 1px solid var(--border-warm);
  color: var(--text-main);
  text-decoration: none;
  font-weight: 600;
  border-radius: 100px;
  background: #fff;
  transition: var(--transition);
}
.btn-warm-outline:hover {
  background: var(--warm-bg);
  border-color: var(--warm-primary);
}

/* Sections */
.section-v13 { padding: 100px 0; }
.section-title-v13 { font-size: 40px; font-weight: 700; text-align: center; margin-bottom: 64px; }

/* Footer */
.footer-v13 {
  background: #fff;
  padding: 80px 0 40px;
  border-top: 1px solid var(--border-warm);
}
.footer-grid-v13 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}
.footer-col-v13 h4 { margin-bottom: 24px; font-size: 14px; text-transform: uppercase; color: var(--text-soft); letter-spacing: 1px; }
.footer-link-v13 { display: block; color: var(--text-soft); text-decoration: none; margin-bottom: 12px; font-size: 14px; transition: 0.2s; }
.footer-link-v13:hover { color: var(--warm-accent); }

/* Modal */
.modal-v13 {
  background: #fff;
  width: 90%;
  max-width: 800px;
  border-radius: 32px;
  padding: 48px;
  box-shadow: 0 32px 80px rgba(0,0,0,0.1);
}