/* ===== 销冠猫AI 公共样式 ===== */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #a5b4fc;
  --accent: #f59e0b;
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #334155;
  --success: #10b981;
  --danger: #ef4444;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* 导航栏 */
.navbar {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 32px;
}
.navbar-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 20px; font-weight: 700;
  color: #fff; text-decoration: none;
}
.logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; color: #fff;
}
.nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav-links a {
  color: var(--text-muted); text-decoration: none;
  font-size: 14px; font-weight: 500;
  padding: 8px 0; position: relative;
  transition: color 0.2s;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
  background: var(--primary); border-radius: 2px;
  transform: scaleX(0); transition: transform 0.2s;
}
.nav-links a:hover { color: var(--primary-light); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links a.active { color: #fff; }
.nav-links a.active::after { transform: scaleX(1); }
.nav-actions { display: flex; align-items: center; gap: 12px; }

/* 容器 */
.container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }
.section { padding: 80px 0; }
.section-title {
  font-size: 32px; font-weight: 700; text-align: center;
  margin-bottom: 16px;
}
.section-subtitle {
  font-size: 16px; color: var(--text-muted); text-align: center;
  margin-bottom: 48px;
}

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 24px; border-radius: 8px;
  font-size: 14px; font-weight: 600;
  text-decoration: none; cursor: pointer;
  border: none; transition: all 0.2s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  color: #fff;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(99,102,241,0.4); }
.btn-secondary {
  background: var(--bg-card); color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-card-hover); }
.btn-outline {
  background: transparent; color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover { background: rgba(99,102,241,0.1); }
.btn-accent {
  background: linear-gradient(135deg, var(--accent), #f97316);
  color: #000;
}
.btn-accent:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(245,158,11,0.4); }
.btn-sm { padding: 6px 16px; font-size: 13px; }
.btn-lg { padding: 14px 36px; font-size: 16px; }
.btn-block { width: 100%; justify-content: center; }

/* 卡片 */
.card {
  background: var(--bg-card); border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 24px; transition: all 0.3s;
}
.card:hover { border-color: var(--primary); transform: translateY(-2px); }

/* 网格 */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* 表单 */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 14px; font-weight: 500;
  margin-bottom: 6px; color: var(--text-muted);
}
.form-input {
  width: 100%; padding: 12px 16px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text);
  font-size: 14px; outline: none;
  transition: border-color 0.2s;
}
.form-input:focus { border-color: var(--primary); }
.form-input::placeholder { color: #475569; }

/* 标签 */
.tag {
  display: inline-block; padding: 4px 12px;
  border-radius: 20px; font-size: 12px; font-weight: 500;
}
.tag-primary { background: rgba(99,102,241,0.15); color: var(--primary-light); }
.tag-success { background: rgba(16,185,129,0.15); color: var(--success); }
.tag-accent { background: rgba(245,158,11,0.15); color: var(--accent); }
.tag-danger { background: rgba(239,68,68,0.15); color: var(--danger); }

/* Footer */
.footer {
  background: var(--bg-card); border-top: 1px solid var(--border);
  padding: 48px 0 24px; margin-top: 80px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand p { color: var(--text-muted); margin-top: 8px; font-size: 14px; }
.footer-col h4 {
  font-size: 14px; font-weight: 600; margin-bottom: 16px;
  color: #fff;
}
.footer-col a {
  display: block; color: var(--text-muted); text-decoration: none;
  font-size: 14px; margin-bottom: 8px; transition: color 0.2s;
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid var(--border);
  margin-top: 32px; padding-top: 24px;
  text-align: center; font-size: 13px; color: var(--text-muted);
}

/* 弹窗/模态框 */
.modal-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.6); z-index: 2000;
  align-items: center; justify-content: center;
}
.modal-overlay.show { display: flex; }
.modal {
  background: var(--bg-card); border-radius: var(--radius);
  padding: 32px; max-width: 480px; width: 90%;
  border: 1px solid var(--border);
}

/* Hero */
.hero {
  padding: 120px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(99,102,241,0.08) 0%, transparent 60%);
  pointer-events: none;
}
.hero-title {
  font-size: 48px; font-weight: 800; line-height: 1.2;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff, var(--primary-light));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-desc {
  font-size: 18px; color: var(--text-muted);
  max-width: 600px; margin: 0 auto 40px;
}

/* 动画 */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.6s ease forwards; }

/* 响应式 */
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hero-title { font-size: 32px; }
  .section { padding: 48px 0; }
  .container { padding: 0 20px; }
  .footer-grid { grid-template-columns: 1fr; }
}