/* ============================================================
   吉林省恒德智能制造产业服务平台 - 导航 & 页脚样式
   来源：AI自动生成（2026-03-16）
   适配终端：PC端、移动端
   ============================================================ */

/* ================================================================
   顶部公告栏
================================================================ */
.topbar {
  background: var(--gray-1);
  color: rgba(255,255,255,0.85);
  font-size: var(--text-xs);
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.topbar-marquee {
  flex: 1;
  overflow: hidden;
  white-space: nowrap;
}
.topbar-marquee span {
  display: inline-block;
  animation: marquee 30s linear infinite;
}
@keyframes marquee {
  0%   { transform: translateX(100%); }
  100% { transform: translateX(-100%); }
}
.topbar-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}
.topbar-links a {
  color: rgba(255,255,255,0.7);
  transition: color 0.2s;
}
.topbar-links a:hover { color: var(--white); }
.topbar-divider {
  width: 1px;
  height: 10px;
  background: rgba(255,255,255,0.2);
}

/* ================================================================
   主导航
================================================================ */
.navbar {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: rgba(3, 33, 74, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(3, 33, 74, 0.99);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}
.navbar-inner {
  display: flex;
  align-items: center;
  height: 68px;
  gap: var(--space-6);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  text-decoration: none;
}
.nav-logo-icon {
  width: 44px;
  height: 44px;
  background: var(--gradient-card);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: 0 4px 12px rgba(10, 95, 196, 0.4);
}
/* 真实 logo 图片 */
.nav-logo-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: transparent;
  filter:
    drop-shadow(0 0 6px rgba(0, 162, 255, 0.7))
    drop-shadow(0 0 12px rgba(0, 162, 255, 0.45))
    drop-shadow(0 0 20px rgba(0, 162, 255, 0.25));
  transition: filter 0.3s ease;
}
.nav-logo-img:hover {
  filter:
    drop-shadow(0 0 8px rgba(0, 162, 255, 0.9))
    drop-shadow(0 0 16px rgba(0, 162, 255, 0.65))
    drop-shadow(0 0 28px rgba(0, 162, 255, 0.4));
}
.nav-logo-text { flex: 1; }
.nav-logo-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.3;
  letter-spacing: 0.02em;
}
.nav-logo-subtitle {
  font-size: 0.65rem;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.05em;
}

/* 主菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
  justify-content: center;
}
.nav-item {
  position: relative;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0.5rem 0.875rem;
  color: rgba(255,255,255,0.8);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
}
.nav-link:hover, .nav-link.active {
  color: var(--white);
  background: rgba(255,255,255,0.08);
}
.nav-link.active {
  color: #7dc4ff;
}
.nav-arrow {
  font-size: 0.6rem;
  transition: transform 0.2s;
  opacity: 0.6;
}
.nav-item:hover .nav-arrow { transform: rotate(180deg); }

/* 下拉菜单 */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 40px rgba(0,0,0,0.15);
  min-width: 220px;
  padding: var(--space-2);
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(-8px);
  transition: var(--transition);
  border: 1px solid var(--gray-5);
  z-index: var(--z-dropdown);
}
.nav-item:hover .nav-dropdown {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--gray-2);
  font-size: var(--text-sm);
  transition: var(--transition-fast);
  cursor: pointer;
}
.nav-dropdown-item:hover {
  background: var(--primary-pale);
  color: var(--primary);
}
.nav-dropdown-item-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--primary-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 0.875rem;
  flex-shrink: 0;
}

/* 右侧操作区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}
.nav-search-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition-fast);
}
.nav-search-btn:hover { background: rgba(255,255,255,0.15); color: var(--white); }

/* 移动端汉堡菜单 */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: rgba(255,255,255,0.85);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端抽屉菜单 */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: min(320px, 80vw);
  height: 100vh;
  background: var(--gray-1);
  z-index: var(--z-modal);
  flex-direction: column;
  padding: var(--space-8) var(--space-6);
  overflow-y: auto;
  transition: right 0.3s ease;
  box-shadow: -4px 0 40px rgba(0,0,0,0.3);
}
.mobile-menu.open { right: 0; }
.mobile-menu-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: calc(var(--z-modal) - 1);
  backdrop-filter: blur(4px);
}
.mobile-menu-overlay.open { display: block; }
.mobile-menu-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  color: rgba(255,255,255,0.6);
  font-size: 1.25rem;
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}
.mobile-menu-close:hover { background: rgba(255,255,255,0.1); color: white; }
.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) 0;
  color: rgba(255,255,255,0.8);
  font-size: var(--text-base);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  cursor: pointer;
}
.mobile-nav-link:hover { color: var(--white); }
.mobile-sub-menu { display: none; padding-left: var(--space-4); }
.mobile-sub-menu.open { display: block; }
.mobile-sub-link {
  display: block;
  padding: var(--space-2) 0;
  color: rgba(255,255,255,0.55);
  font-size: var(--text-sm);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.mobile-sub-link:hover { color: rgba(255,255,255,0.85); }

/* ================================================================
   页脚
================================================================ */
.footer {
  background: var(--black);
  color: rgba(255,255,255,0.65);
  padding-top: var(--space-16);
}

.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
  gap: var(--space-10);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

/* 页脚 Logo 区 */
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.footer-logo-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-card);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}
/* 真实 footer logo 图片 */
.footer-logo-img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: transparent;
  filter:
    drop-shadow(0 0 6px rgba(0, 162, 255, 0.6))
    drop-shadow(0 0 12px rgba(0, 162, 255, 0.4))
    drop-shadow(0 0 18px rgba(0, 162, 255, 0.2));
}
.footer-logo-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.4;
}
.footer-desc {
  font-size: var(--text-sm);
  line-height: 1.8;
  margin-bottom: var(--space-6);
  color: rgba(255,255,255,0.5);
}
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  margin-bottom: var(--space-2);
}
.footer-contact-item a:hover { color: var(--white); }
.footer-contact-item .contact-icon {
  width: 20px;
  height: 20px;
  color: var(--primary-light);
  font-size: 0.875rem;
  flex-shrink: 0;
}

/* 页脚链接列 */
.footer-col-title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-links { display: flex; flex-direction: column; gap: var(--space-2); }
.footer-link {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  transition: color 0.2s;
  cursor: pointer;
}
.footer-link:hover { color: rgba(255,255,255,0.85); padding-left: 4px; }

/* 二维码区 */
.footer-qr-group {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.footer-qr-item { text-align: center; }
.footer-qr-box {
  width: 88px;
  height: 88px;
  background: var(--white);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-2);
  padding: 4px;
}
.footer-qr-box svg { width: 80px; height: 80px; }
.footer-qr-label {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
}

/* 页脚底部版权 */
.footer-bottom {
  padding: var(--space-6) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
}
.footer-icp a { color: rgba(255,255,255,0.4); transition: color 0.2s; }
.footer-icp a:hover { color: rgba(255,255,255,0.7); }
.footer-policy-links {
  display: flex;
  gap: var(--space-4);
  align-items: center;
}
.footer-policy-links a {
  color: rgba(255,255,255,0.35);
  font-size: var(--text-xs);
  transition: color 0.2s;
}
.footer-policy-links a:hover { color: rgba(255,255,255,0.7); }
.footer-policy-divider {
  width: 1px;
  height: 10px;
  background: rgba(255,255,255,0.15);
}

/* ================================================================
   搜索框全局弹层
================================================================ */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(3, 33, 74, 0.85);
  z-index: var(--z-modal);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 80px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(8px);
}
.search-overlay.open { opacity: 1; pointer-events: all; }
.search-box-wrap {
  width: 100%;
  max-width: 680px;
  padding: 0 var(--space-4);
  transform: translateY(-16px);
  transition: transform 0.3s ease;
}
.search-overlay.open .search-box-wrap { transform: none; }
.search-input-group {
  display: flex;
  align-items: center;
  background: var(--white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-6);
}
.search-input-field {
  flex: 1;
  background: none;
  border: none;
  font-size: var(--text-lg);
  color: var(--gray-1);
  padding: var(--space-3) 0;
}
.search-input-field::placeholder { color: var(--gray-4); }
.search-btn-go {
  background: var(--gradient-card);
  color: var(--white);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.search-btn-go:hover { box-shadow: var(--shadow-md); transform: scale(1.02); }
.search-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}
.search-tag {
  background: rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.75);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-full);
  padding: 0.25rem 0.875rem;
  font-size: var(--text-xs);
  cursor: pointer;
  transition: var(--transition-fast);
}
.search-tag:hover { background: rgba(255,255,255,0.22); color: white; }
.search-close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  color: rgba(255,255,255,0.6);
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition-fast);
}
.search-close:hover { color: white; transform: rotate(90deg); }

/* ================================================================
   响应式导航
================================================================ */
@media (max-width: 1024px) {
  .nav-menu { gap: 0; }
  .nav-link { padding: 0.5rem 0.625rem; font-size: 0.8rem; }
}

@media (max-width: 768px) {
  .nav-menu { display: none; }
  .nav-hamburger { display: flex; }
  .mobile-menu { display: flex; }
  .topbar { display: none; }
  .navbar-inner { height: 60px; }

  .footer-main {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 480px) {
  .footer-main { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .nav-actions .btn { display: none; }
}