/* ========================================
   导航栏
   ======================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

.nav-brand .brand-icon {
  font-size: var(--text-2xl);
  -webkit-text-fill-color: initial;
}

.nav-search {
  flex: 1;
  max-width: 420px;
  margin: 0 var(--space-xl);
}

.nav-search-input {
  width: 100%;
  height: 40px;
  padding: 0 var(--space-md) 0 40px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
  background: var(--bg-primary);
}

.nav-search-wrapper {
  position: relative;
}

.nav-search-wrapper .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  pointer-events: none;
  font-size: var(--text-sm);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  color: var(--text-secondary);
  font-size: var(--text-lg);
}

.nav-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.nav-submit-btn {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 8px 16px;
  background: var(--gradient-primary);
  color: white;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-submit-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ========================================
   Hero 区域
   ======================================== */

.hero {
  margin-top: var(--nav-height);
  padding: var(--space-xl) 0;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(168, 85, 247, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(236, 72, 153, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(var(--text-2xl), 4vw, 2.5rem);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: var(--space-sm);
  line-height: 1.2;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #818cf8, #c084fc, #f472b6);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-md);
  line-height: 1.5;
}

.hero-search {
  max-width: 520px;
  margin: 0 auto var(--space-md);
}

.hero-search-wrapper {
  position: relative;
}

.hero-search-input {
  width: 100%;
  height: 48px;
  padding: 0 56px 0 48px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-xl);
  font-size: var(--text-base);
  color: #ffffff;
  transition: all var(--transition-fast);
}

.hero-search-input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.hero-search-input:focus {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

.hero-search-wrapper .search-icon {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255, 255, 255, 0.5);
  pointer-events: none;
}

.hero-search-wrapper .search-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background: var(--gradient-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.hero-search-wrapper .search-btn:hover {
  transform: translateY(-50%) scale(1.05);
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.hero-stat {
  text-align: center;
}

.hero-stat-value {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: #ffffff;
}

.hero-stat-label {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
  margin-top: 2px;
}