/* ============================================
   语信IDC - 全新设计系统 Layout.css
   导航栏、页脚、整体布局
   ============================================ */

/* ===== 顶部导航栏 ===== */
.topbar {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: all var(--transition-normal);
}

.topbar.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.95);
}

.topbar .container {
  max-width: var(--container-width);
}

.topbar .nav {
  display: flex;
  align-items: center;
  height: var(--nav-height);
  gap: var(--space-6);
}

/* 品牌Logo */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-primary);
  margin-right: var(--space-2);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.brand:hover {
  transform: scale(1.02);
}

.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-lg);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  box-shadow: var(--shadow-primary);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-extrabold);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-sub {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-normal);
  letter-spacing: 1px;
}

/* 导航链接 */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
}

.nav-links > a {
  position: relative;
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-secondary);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-links > a:hover {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.nav-links > a.active {
  color: var(--color-primary);
  background: var(--color-primary-bg);
  font-weight: var(--font-weight-semibold);
}

.nav-links > a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

/* 下拉菜单 */
.nav-dropdown {
  position: relative;
}

.dropdown-trigger {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-secondary);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dropdown-trigger:hover {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.dropdown-arrow {
  font-size: 10px;
  transition: transform var(--transition-fast);
}

.nav-dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border-light);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
  background: var(--color-primary-bg);
  color: var(--color-primary);
  padding-left: var(--space-5);
}

.dropdown-menu .menu-icon {
  font-size: var(--font-size-lg);
  width: 24px;
  text-align: center;
}

/* 导航右侧用户区 */
.nav-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.nav-user .btn {
  padding: var(--space-2) var(--space-5);
}

.user-avatar-nav {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 2px solid var(--color-primary-bg);
}

.user-avatar-nav:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-primary);
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  cursor: pointer;
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ===== 内测活动横幅 ===== */
.beta-banner {
  background: linear-gradient(135deg, #7c3aed 0%, #2563eb 50%, #06b6d4 100%);
  color: #fff;
  padding: var(--space-3) var(--space-5);
  position: relative;
  overflow: hidden;
}

.beta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.beta-banner .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  position: relative;
  z-index: 1;
}

.beta-banner-content {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
}

.beta-banner-icon {
  font-size: var(--font-size-2xl);
  animation: pulse 2s ease-in-out infinite;
}

.beta-banner-text {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
}

.beta-banner-text strong {
  font-weight: var(--font-weight-bold);
}

.beta-banner-btn {
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.beta-banner-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

.beta-banner-close {
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: #fff;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.beta-banner-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* ===== 主内容区 ===== */
.main-content {
  min-height: calc(100vh - var(--nav-height) - 300px);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--gradient-dark);
  color: #94a3b8;
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-16);
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

.footer .container {
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-10);
}

.footer-brand {
  max-width: 320px;
}

.footer-brand-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.footer-brand-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  box-shadow: var(--shadow-primary);
}

.footer-brand-name {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-extrabold);
  color: #fff;
}

.footer-brand-desc {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-5);
}

.footer-sponsor {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  font-size: var(--font-size-sm);
}

.footer-sponsor-label {
  color: #64748b;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-sponsor a {
  color: #cbd5e1;
  font-weight: var(--font-weight-semibold);
}

.footer-sponsor a:hover {
  color: var(--color-primary-lighter);
}

.footer-col-title {
  color: #fff;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-5);
  position: relative;
  padding-bottom: var(--space-3);
}

.footer-col-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

.footer-col-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-col-links a {
  color: #94a3b8;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-col-links a::before {
  content: '›';
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  opacity: 0;
  transform: translateX(-5px);
  transition: all var(--transition-fast);
}

.footer-col-links a:hover {
  color: #fff;
  padding-left: var(--space-2);
}

.footer-col-links a:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copyright {
  font-size: var(--font-size-sm);
  color: #64748b;
}

.footer-copyright a {
  color: #94a3b8;
}

.footer-copyright a:hover {
  color: #fff;
}

.footer-contact {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--font-size-sm);
  color: #64748b;
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-contact-item a {
  color: #94a3b8;
}

.footer-contact-item a:hover {
  color: #fff;
}

/* ===== 回到顶部按钮 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  cursor: pointer;
  box-shadow: var(--shadow-primary-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: var(--z-sticky);
  border: none;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -10px rgba(37, 99, 235, 0.5);
}

/* ===== 响应式 - 平板 ===== */
@media (max-width: 1024px) {
  .topbar .nav {
    gap: var(--space-4);
  }

  .nav-links {
    gap: 0;
  }

  .nav-links > a {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-base);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .footer-brand {
    grid-column: 1 / -1;
    max-width: 100%;
  }
}

/* ===== 响应式 - 手机 ===== */
@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .topbar .nav {
    height: var(--nav-height);
    gap: var(--space-3);
    flex-wrap: nowrap;
  }

  .nav-toggle {
    display: flex;
  }

  .brand {
    flex: 1;
    margin-right: 0;
  }

  .brand-text {
    display: none;
  }

  .nav-user {
    gap: var(--space-2);
  }

  .nav-user .btn {
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-sm);
  }

  .topbar .nav .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    flex-direction: column;
    gap: 0;
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-dropdown);
    padding: var(--space-3);
    align-items: stretch;
  }

  .topbar .nav .nav-links.open {
    display: flex;
  }

  .topbar .nav .nav-links > a {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
  }

  .topbar .nav .nav-links > a.active::after {
    display: none;
  }

  .nav-dropdown {
    width: 100%;
  }

  .dropdown-trigger {
    width: 100%;
    justify-content: space-between;
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 0 0 0 var(--space-4);
    display: none;
  }

  .nav-dropdown.open .dropdown-menu {
    display: block;
  }

  .beta-banner .container {
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .beta-banner-content {
    flex-wrap: wrap;
  }

  .beta-banner-text {
    font-size: var(--font-size-sm);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-contact {
    flex-direction: column;
    gap: var(--space-3);
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }
}

/* ===== 响应式 - 小屏手机 ===== */
@media (max-width: 480px) {
  .beta-banner-btn {
    width: 100%;
    text-align: center;
  }
}

/* ===== 从layout.html提取的样式 ===== */
/* 鐢ㄦ埛鍚嶄笅鎷夎彍鍗曟牱寮?*/
.user-dropdown {
    position: relative;
    display: inline-block;
}

.user-trigger {
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 8px;
    transition: all 0.2s ease;
    text-decoration: none;
    color: #374151;
}

.user-trigger:hover {
    background: #f9fafb;
}

.user-name-text {
    font-size: 14px;
    font-weight: 500;
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 涓嬫媺鑿滃崟鏍峰紡 */
.nav-dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-trigger {
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    overflow: hidden;
}
.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.dropdown-arrow {
    font-size: 10px;
    transition: transform 0.2s ease;
    color: #9ca3af;
}

.user-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15), 0 0 0 1px rgba(0,0,0,0.05);
    min-width: 240px;
    z-index: 1000;
    overflow: hidden;
    animation: dropdownIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    transform-origin: top right;
}
.more-dropdown .dropdown-menu {
    right: auto;
    left: 0;
    min-width: 172px;
    transform-origin: top left;
}
.product-dropdown .dropdown-menu {
    right: auto;
    left: 0;
    min-width: 264px;
    transform-origin: top left;
    padding: 8px;
}
.product-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px !important;
    border-radius: 10px;
}
.product-item:hover {
    background: #f5f8ff !important;
}
.product-item.active {
    background: #f5f8ff !important;
}
.pi-icon {
    width: 38px;
    height: 38px;
    border-radius: 9px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}
.product-item:nth-child(2) .pi-icon {
    background: linear-gradient(135deg, #0d9488, #14b8a6);
}
.pi-body {
    display: flex;
    flex-direction: column;
    line-height: 1.35;
}
.pi-name {
    font-size: 14.5px;
    font-weight: 600;
    color: #111827;
}
.product-item:hover .pi-name {
    color: #2563eb;
}
.pi-desc {
    font-size: 12px;
    color: #9ca3af;
}
.product-trigger {
    padding: 8px 16px;
    color: #4b5563;
    border-radius: 6px;
    font-size: 14.5px;
    white-space: nowrap;
    transition: color .15s;
}
.product-trigger:hover {
    color: #2563eb;
}
.more-trigger {
    padding: 8px 14px;
    color: #4b5563;
    border-radius: 6px;
    font-size: 14px;
    white-space: nowrap;
}
.more-trigger:hover {
    color: #2563eb;
    background: #eff6ff;
}
@media (max-width: 768px) {
    .nav-links .nav-dropdown .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        border-radius: 0;
        background: transparent;
        min-width: 0;
        transform-origin: initial;
        padding: 0 0 0 14px;
    }
    .nav-links .nav-dropdown .dropdown-menu a {
        padding: 10px 14px;
        color: #4b5563;
        border-radius: 6px;
    }
}

@keyframes dropdownIn {
    from {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.dropdown-user-info {
    padding: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar-large {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    border: 2px solid rgba(255,255,255,0.3);
    overflow: hidden;
}
.user-avatar-large img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-details {
    flex: 1;
}

.user-name {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 2px;
}

.user-role {
    color: rgba(255,255,255,0.8);
    font-size: 12px;
}

.dropdown-divider {
    height: 1px;
    background: #f3f4f6;
    margin: 4px 0;
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    color: #374151;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s ease;
}

.menu-icon {
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.dropdown-menu a:hover {
    background: linear-gradient(90deg, #eff6ff 0%, #f5f3ff 100%);
    color: #667eea;
    padding-left: 20px;
}

.dropdown-menu a.active {
    background: linear-gradient(90deg, #eff6ff 0%, #f5f3ff 100%);
    color: #667eea;
    font-weight: 500;
}

/* 瀵艰埅鏍忓搷搴斿紡浼樺寲 */
@media (max-width: 1200px) {
    .nav-links a {
        padding: 0 10px;
        font-size: 13px;
    }
}

/* 搴曢儴鏍峰紡浼樺寲锛氱幇浠ｅ鏍忛〉鑴?*/
.footer {
    position: relative;
    background: linear-gradient(180deg, #0f172a 0%, #16233f 60%, #1b2b4f 100%);
    color: #94a3b8;
    padding: 52px 20px 26px;
    margin-top: 48px;
    font-size: 13.5px;
}
.footer-wave {
    position: absolute;
    left: 0; right: 0; top: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2, #f59e0b, #667eea);
    background-size: 300% 100%;
    animation: footerWave 10s linear infinite;
}
@keyframes footerWave {
    0% { background-position: 0% 0; }
    100% { background-position: 300% 0; }
}
.footer .container { max-width: 1200px; margin: 0 auto; }
.footer-main {
    display: flex;
    flex-wrap: wrap;
    gap: 36px 48px;
    padding-bottom: 34px;
}
.footer-brand { flex: 1 1 300px; max-width: 380px; }
.footer-logo {
    font-size: 19px;
    font-weight: 700;
    color: #fff;
    letter-spacing: .5px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.footer-logo::before {
    content: '';
    width: 8px; height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #f59e0b);
    box-shadow: 0 0 0 4px rgba(102,126,234,.18);
    display: inline-block;
}
.footer-desc {
    font-size: 13px;
    line-height: 1.7;
    color: #7d8ba6;
    margin-bottom: 16px;
}
.footer-sponsor {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.08);
    font-size: 12.5px;
    color: #a5b4cb;
}
.footer-sponsor-icon { font-size: 14px; }
.footer-sponsor a {
    color: #7aa7f7;
    text-decoration: none;
    font-weight: 600;
}
.footer-sponsor a:hover { text-decoration: underline; }
.footer-col { flex: 1 1 130px; min-width: 110px; }
.footer-col-title {
    font-size: 13.5px;
    font-weight: 600;
    color: #e2e8f0;
    margin-bottom: 14px;
    position: relative;
    padding-bottom: 8px;
}
.footer-col-title::after {
    content: '';
    position: absolute;
    left: 0; bottom: 0;
    width: 22px; height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}
.footer-col a {
    display: block;
    color: #7d8ba6;
    text-decoration: none;
    font-size: 13px;
    padding: 4px 0;
    transition: color .2s, transform .2s;
}
.footer-col a:hover {
    color: #fff;
    transform: translateX(3px);
}
.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px 16px;
    border-top: 1px solid rgba(255,255,255,.08);
    padding-top: 18px;
}
.footer-copyright { font-size: 12.5px; color: #64748b; }
.footer-icp { font-size: 12px; color: #64748b; display: flex; align-items: center; flex-wrap: wrap; gap: 4px; }
.footer-icp a { color: #64748b; text-decoration: none; margin: 0 4px; transition: color .2s; }
.footer-icp a:hover { color: #a5b4cb; }
.footer-contact { margin-left: 8px; }
.footer-qq:hover { color: #12b7f5; }
.footer-qq-group:hover { color: #12b7f5; }
.footer-qq-group:hover .qq-qrcode-popup { display: block !important; }
@media (max-width: 768px) {
    .footer { padding: 36px 16px 20px; }
    .footer-main { gap: 26px; }
    .footer-brand { flex-basis: 100%; max-width: none; }
    .footer-col { flex-basis: calc(50% - 14px); }
    .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
}