/* Phase 1 Header 样式 + 手机端适配
   v2: 增加积分徽章、升级按钮、会员金冠 */
.xx-top-nav {
  height: 68px;
  position: sticky;
  top: 0;
  z-index: var(--z-fixed);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.xx-top-nav-inner {
  max-width: 1440px;
  margin: 0 auto;
  height: 100%;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.xx-brand {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-extrabold);
  border: none;
  background: none;
  cursor: pointer;
  color: var(--text-primary);
  padding: 0;
  flex-shrink: 0;
}

.xx-logo {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: grid;
  place-items: center;
  color: var(--text-inverse);
  box-shadow: var(--shadow-primary);
  font-size: var(--font-size-xl);
}

/* 桌面端导航链接 */
.xx-nav-links {
  display: flex;
  gap: var(--space-md);
  color: var(--text-secondary);
  font-weight: var(--font-weight-bold);
}

.xx-nav-links button {
  border: none;
  background: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 6px 4px;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.xx-nav-links button:hover {
  color: var(--primary-color);
}

.xx-nav-links button.active {
  color: var(--primary-color);
}

/* 右侧区域 */
.xx-right-section {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* v2: 顶部积分徽章 */
.xx-header-points {
  cursor: pointer;
}

/* v2: 升级会员按钮 */
.xx-upgrade-btn {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  border: none;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.xx-upgrade-btn:hover {
  background: linear-gradient(135deg, #d97706, #dc2626) !important;
  color: #fff !important;
}

/* v2: 会员金冠按钮 */
.xx-crown-btn {
  font-weight: 700;
  color: #d97706;
  padding: 2px 8px;
}

.xx-crown-btn:hover {
  background: rgba(245, 158, 11, 0.1) !important;
  color: #b45309 !important;
}

.xx-user-menu {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  color: var(--text-primary);
  font-size: var(--font-size-base);
}

.xx-avatar {
  width: 34px;
  height: 34px;
  background: var(--primary-soft);
  color: var(--primary-dark);
}

/* 汉堡菜单按钮（默认隐藏） */
.xx-hamburger {
  display: none;
  border: none;
  background: none;
  cursor: pointer;
  font-size: var(--font-size-xl);
  color: var(--text-secondary);
  padding: var(--space-sm);
}

/* 手机端导航抽屉内容 */
.xx-mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

/* v2: 手机端积分/会员行 */
.xx-mobile-points-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 4px 16px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.xx-mobile-member-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 700;
  color: #d97706;
  background: #fef3c7;
  padding: 4px 10px;
  border-radius: 999px;
}

.xx-mobile-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px var(--space-md);
  border: none;
  background: none;
  cursor: pointer;
  font-size: var(--font-size-md);
  color: var(--color-gray-700);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
  width: 100%;
  text-align: left;
}

.xx-mobile-nav-item:hover {
  background: var(--bg-tertiary);
}

.xx-mobile-nav-item.active {
  background: var(--primary-soft);
  color: var(--primary-color);
  font-weight: var(--font-weight-semibold);
}

.xx-mobile-nav-icon {
  font-size: 18px;
  width: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== 手机端响应式 ===== */
@media (max-width: 768px) {
  .xx-top-nav {
    height: 56px;
  }

  .xx-top-nav-inner {
    padding: 0 12px;
    gap: 6px;
  }

  .xx-brand-text {
    display: none;
  }

  /* 隐藏桌面端导航 */
  .xx-nav-links {
    display: none;
  }

  /* 显示汉堡菜单 */
  .xx-hamburger {
    display: block;
  }

  /* 隐藏用户名 */
  .xx-username {
    display: none;
  }

  /* 手机端：缩小升级按钮文字 */
  .xx-upgrade-btn {
    padding: 0 8px !important;
    font-size: 12px !important;
    height: 28px;
  }

  .xx-crown-btn {
    padding: 0 4px !important;
    font-size: 12px !important;
    height: 28px;
  }
}

/* 小屏幕平板：导航文字缩小 */
@media (min-width: 769px) and (max-width: 1024px) {
  .xx-nav-links {
    gap: var(--space-sm);
  }

  .xx-nav-links button {
    font-size: 13px;
  }

  .xx-header-points {
    transform: scale(0.9);
    transform-origin: center;
  }

  .xx-upgrade-btn {
    font-size: 12px !important;
    padding: 0 10px !important;
  }
}