/* ===== 三角洲行动辅助 - 共享样式 ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: #0a0e17;
  color: #e0e4f0;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: #60a5fa; text-decoration: none; }
a:hover { color: #93c5fd; }

/* Header / Nav */
.header {
  background: linear-gradient(135deg, #0d1321 0%, #1a1f35 50%, #0d1321 100%);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0;
  position: relative;
  overflow: hidden;
}
.nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: 1px;
}
.nav-logo span { color: #3b82f6; }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a {
  color: #8892b0;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: #fff; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s ease;
  border: none;
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(37,99,235,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(37,99,235,0.5);
}
.btn-secondary {
  background: rgba(255,255,255,0.06);
  color: #e0e4f0;
  border: 1px solid rgba(255,255,255,0.1);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}
.btn-sm { padding: 8px 20px; font-size: 13px; }

/* Hero */
.hero {
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 20px;
  text-align: center;
}
.hero h1 {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 0%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 17px;
  color: #8892b0;
  max-width: 650px;
  margin: 0 auto 24px;
}
.hero-mini { padding: 30px 20px; }
.hero-mini h1 { font-size: 28px; }

/* Section */
.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 50px 20px;
}
.section-title {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
}
.section-sub {
  text-align: center;
  color: #8892b0;
  margin-bottom: 36px;
  font-size: 15px;
}

/* Content card */
.content-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 36px;
  margin-bottom: 20px;
}
.content-card h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  color: #f0f4ff;
}
.content-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 24px 0 10px;
  color: #c8d0e8;
}
.content-card p {
  font-size: 15px;
  color: #8892b0;
  margin-bottom: 12px;
  line-height: 1.8;
}
.content-card ul {
  margin: 8px 0 16px 20px;
}
.content-card ul li {
  font-size: 14px;
  color: #8892b0;
  margin-bottom: 6px;
  line-height: 1.7;
}

/* Footer */
.footer {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 32px 20px;
  text-align: center;
  font-size: 13px;
  color: #555;
}
.footer a { color: #64748b; text-decoration: none; }
.footer a:hover { color: #93c5fd; }
.footer-links { margin-bottom: 10px; display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* Responsive */
@media (max-width: 640px) {
  .hero h1 { font-size: 26px; }
  .hero-mini h1 { font-size: 22px; }
  .hero p { font-size: 15px; }
  .nav-links { display: none; }
  .section { padding: 30px 16px; }
  .section-title { font-size: 22px; }
  .btn { padding: 12px 24px; font-size: 14px; }
  .content-card { padding: 24px 16px; }
}

/* Layout */
.page-wrap {
  min-height: calc(100vh - 160px);
  display: flex;
  flex-direction: column;
}
.page-wrap .section { flex: 1; }