/* -----------------------------------
   基础与 Header 布局
----------------------------------- */
.main-header {
  padding-top: 0;
  background: var(--color-bg-header, #ffffff);
  box-shadow: var(--shadow-soft, 0 2px 10px rgba(0, 0, 0, 0.05));
  border-bottom: 1px solid var(--color-border, #e5e7eb);
  width: 100%;
}

.main-header .container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
  box-sizing: border-box;
}

.header-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 6px;
}

.header-controls .logo {
  order: 1;
}

.logo-image {
  transition: all 0.3s ease;
  display: block;
}

.header-user {
  order: 3;
  display: flex;
  gap: 10px;
  flex: 0 0 auto;
  width: auto;
  text-align: center;
}

/* 按钮样式 */
.btn-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  background: transparent;
  color: var(--color-brand-primary, #2563eb);
  border: 1.5px solid var(--color-brand-primary, #2563eb);
  border-radius: 50px;
  transition: all 0.3s ease;
  letter-spacing: 0.5px;
  text-decoration: none;
  box-sizing: border-box;
}

.btn-login:hover {
  background: var(--color-brand-primary, #2563eb);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-blue, 0 4px 12px rgba(37, 99, 235, 0.2));
}

.btn-register {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  color: #ffffff;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  border-radius: 50px;
  transition: all 0.3s ease;
  letter-spacing: 0.5px;
  border: none;
  text-decoration: none;
  box-sizing: border-box;
}

.btn-register:hover {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-blue, 0 4px 12px rgba(37, 99, 235, 0.2));
}

/* 移动端汉堡包菜单按钮 */
.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: 50%;
}

.hamburger-line {
  width: 1.5rem;
  height: 2px;
  background-color: #5c5c5c;
  display: block;
}

.header-user-h5 {
  display: none;
}

/* -----------------------------------
   桌面端导航 (Head Bot)
----------------------------------- */
.head-bot {
  display: block !important;
  background: linear-gradient(90deg, #f8fafc 0%, #ffffff 50%, #f8fafc 100%);
  border-top: 1px solid var(--color-border, #e5e7eb);
  border-bottom: 2px solid var(--color-brand-primary, #2563eb);
  padding: 0.5rem 0;
}

.desktop-nav-ul {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  z-index: 52;
}

.desktop-nav-li {
  padding: 0 0.75rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  /* color: rgba(255, 255, 255, 0.9); */
  text-transform: uppercase;
  text-decoration: none;
  padding: 12px 0;
  transition: all 0.3s ease;
  letter-spacing: 0.5px;
}

.nav-link.active {
  color: #2563eb;
  font-weight: 700;
}

.nav-link:hover {
  color: var(--color-brand-primary, #2563eb);
  font-weight: 600;
}

.nav-logo {
  transition: all 0.3s ease;
}

/* -----------------------------------
   吸顶 (Sticky) 定位
----------------------------------- */
@keyframes slideIn {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.is-sticky {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  animation: slideIn 0.5s ease-out forwards;
  box-shadow: var(--shadow-soft, 0 4px 12px rgba(0, 0, 0, 0.15));
  background-color: rgba(255, 255, 255, 0.98);
}

.is-sticky .logo-image {
  width: 140px;
  height: 70px;
}

/* -----------------------------------
   移动端抽屉菜单 (Mobile Drawer)
----------------------------------- */
.mobile-menu-wrapper {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
}

.mobile-menu-wrapper.hidden {
  display: none;
}

.mobile-menu-overlay {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: rgba(0, 0, 0, 0.5);
}

.mobile-menu-close {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 101;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  background: transparent;
  border: none;
  cursor: pointer;
}

.mobile-menu-close:hover {
  color: #e5e7eb;
}

.mobile-menu-panel {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 80%;
  max-width: 280px;
  background-color: #f5f5f5;
  overflow-y: auto;
  transition: transform 0.3s ease-out;
  transform: translateX(0);
}

.mobile-menu-panel.closed {
  transform: translateX(-100%);
}

.mobile-search-box {
  padding: 0.75rem;
  margin-top: 0.75rem;
}

.search-input-group {
  display: flex;
}

.search-input {
  flex: 1;
  border: 1px solid #d1d5db;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  background-color: #ffffff;
  outline: none;
}

.search-btn {
  background-color: #0898d6;
  color: #ffffff;
  padding: 0.5rem 0.75rem;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-nav {
  background-color: #f5f5f5;
}

.mobile-nav-ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav-li {
  border-bottom: 1px solid #e5e7eb;
}

.mobile-nav-link {
  display: block;
  padding: 0.75rem 1rem;
  color: #6b7280;
  text-decoration: none;
  transition: background-color 0.2s, color 0.2s;
}

.mobile-nav-link:hover {
  color: #0898d6;
  background-color: #f3f4f6;
}

.mobile-nav-label {
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* -----------------------------------
   响应式媒体查询 (Media Queries)
----------------------------------- */
@media (max-width: 850px) {
  .header-controls {
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    padding: 0;
  }

  .header-controls .mobile-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
    order: 1;
    color: #5c5c5c !important;
  }

  .header-controls .logo {
    order: 2;
    flex: 1;
    text-align: center;
  }

  .header-controls .logo img {
    margin: 0 auto;
    width: 140px;
    height: 70px;
  }

  .header-user {
    display: none !important;
  }

  .head-bot .nav-list {
    display: none !important;
  }

  .head-bot .header-user-h5 {
    display: flex !important;
    justify-content: center;
    align-items: center;
    gap: 10px;
  }
}