/* ====================================
   睿来智能体官网 - 组件样式
   Reliable Agent Official Website - Component Styles
   ==================================== */

/* ========== 页面头部 Header ========== */
.header {
  position: fixed;
  top: 16px;
  left: 16px;
  right: 16px;
  width: auto;
  height: 64px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(148, 163, 184, 0.15);
  border-radius: var(--radius-lg);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header.scrolled {
  top: 8px;
  background: rgba(15, 23, 42, 0.95);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

/* 浅色主题 - Header样式 */
[data-theme="light"] .header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(229, 231, 235, 0.9);
  box-shadow: 0 4px 16px 0 rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 8px 24px -4px rgba(0, 0, 0, 0.1);
  border-color: rgba(229, 231, 235, 1);
}

/* ========== 页面标题区 Page Hero ========== */
.page-hero {
  background: var(--gradient-dark);
  padding: calc(var(--space-xxxl) + 80px) 0 var(--space-xxl); /* 80px 为浮动导航栏高度(64px) + 顶部间距(16px) */
  text-align: center;
}

.page-hero h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, #FFFFFF 0%, #818CF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-hero p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

/* 浅色主题 - Page Hero 标题（与首页保持一致的渐变效果） */
[data-theme="light"] .page-hero h1 {
  background: linear-gradient(135deg, #1E293B 0%, #6366F1 50%, #A78BFA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text-white);
  cursor: pointer;
}

.header-logo svg {
  width: 40px;
  height: 40px;
}

/* Logo切换 - 默认显示深色logo */
.logo-light {
  display: none;
}

.logo-dark {
  display: block;
}

/* 浅色主题 - 显示浅色logo */
[data-theme="light"] .logo-light {
  display: block;
}

[data-theme="light"] .logo-dark {
  display: none;
}

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

.header-nav a {
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  position: relative;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.header-nav a:hover {
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.1);
}

.header-nav a.active {
  color: var(--color-primary);
}

.header-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
}

/* 浅色主题 - 导航链接（与深色模式保持一致） */
[data-theme="light"] .header-nav a {
  font-weight: 500;
  color: var(--color-text-primary);
}

[data-theme="light"] .header-nav a:hover {
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.1);
}

[data-theme="light"] .header-nav a.active {
  color: var(--color-primary);
  font-weight: 600;
}

/* 主题切换按钮 */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.theme-toggle:hover {
  background: rgba(99, 102, 241, 0.25);
  border-color: var(--color-primary);
  transform: scale(1.05);
}

.theme-icon {
  position: absolute;
  transition: all var(--transition-base);
  color: var(--color-primary-light);
}

/* 深色主题时显示月亮图标（点击切换到浅色） */
.sun-icon {
  opacity: 0;
  transform: rotate(180deg) scale(0);
}

.moon-icon {
  opacity: 1;
  transform: rotate(0) scale(1);
  color: #A78BFA;
}

/* 浅色主题时显示太阳图标（点击切换到深色） */
[data-theme="light"] .sun-icon {
  opacity: 1;
  transform: rotate(0) scale(1);
  color: #F59E0B;
}

[data-theme="light"] .moon-icon {
  opacity: 0;
  transform: rotate(-180deg) scale(0);
}

/* 浅色主题 - 主题切换按钮 */
[data-theme="light"] .theme-toggle {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.3);
}

[data-theme="light"] .theme-toggle:hover {
  background: rgba(245, 158, 11, 0.2);
  border-color: #F59E0B;
}

.header-cta {
  margin-left: var(--space-lg);
}

/* ========== 导航栏按钮优化 ========== */
/* 使用更高优先级的选择器 (.header-nav .header-cta .btn) 覆盖导航链接 (.header-nav a) 的默认样式 */
.header-nav .header-cta .btn {
  height: 42px !important;
  padding: 0 var(--space-lg) !important;
  margin: 0 !important; /* 重置导航链接可能存在的负边距 */
  background: var(--color-primary) !important;
  color: #FFFFFF !important;
  border: none !important;
  border-radius: var(--radius-full) !important;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* 隐藏可能从导航链接继承的下划线伪元素 */
.header-nav .header-cta .btn::after {
  display: none !important;
}

.header-nav .header-cta .btn:hover:not(:disabled) {
  background: var(--color-primary-light) !important;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(139, 92, 246, 0.4);
  filter: none;
  border-radius: var(--radius-full) !important;
}

.header-nav .header-cta .btn:active:not(:disabled) {
  transform: translateY(1px);
  box-shadow: 0 2px 4px rgba(139, 92, 246, 0.2);
}

/* 浅色主题 - 导航栏按钮 */
[data-theme="light"] .header-nav .header-cta .btn {
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.25);
}

[data-theme="light"] .header-nav .header-cta .btn:hover:not(:disabled) {
  box-shadow: 0 8px 24px rgba(124, 58, 237, 0.35);
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
  touch-action: manipulation;
}

.menu-toggle:hover {
  background: var(--color-bg-hover);
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ========== 按钮组件 Button ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  font-size: var(--font-size-base);
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* 主按钮 - 大号 */
.btn-primary-lg {
  height: 56px;
  padding: 0 var(--space-lg);
  background: var(--gradient-purple);
  color: var(--color-text-white);
  box-shadow: var(--shadow-md);
}

.btn-primary-lg:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.08);
}

.btn-primary-lg:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* 主按钮 - 中号 */
.btn-primary-md {
  height: 48px;
  padding: 0 var(--space-md);
  background: var(--gradient-purple);
  color: var(--color-text-white);
  box-shadow: var(--shadow-md);
  border: 2px solid var(--color-primary);
}

.btn-primary-md:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.08);
}

.btn-primary-md:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* 浅色主题 - 按钮样式优化 */
[data-theme="light"] .btn-primary-lg,
[data-theme="light"] .btn-primary-md {
  color: #FFFFFF;
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px 0 rgba(124, 58, 237, 0.25);
}

[data-theme="light"] .btn-primary-lg:hover:not(:disabled),
[data-theme="light"] .btn-primary-md:hover:not(:disabled) {
  box-shadow: 0 8px 20px 0 rgba(124, 58, 237, 0.35);
  filter: brightness(1.05);
}

[data-theme="light"] .btn-secondary {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(124, 58, 237, 0.05);
}

[data-theme="light"] .btn-secondary:hover:not(:disabled) {
  background: rgba(124, 58, 237, 0.12);
  border-color: var(--color-primary-dark);
}

/* 次级按钮 */
.btn-secondary {
  height: 48px;
  padding: 0 var(--space-md);
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(139, 92, 246, 0.1);
}

.btn-secondary:active:not(:disabled) {
  background: rgba(99, 102, 241, 0.2);
}

/* CTA 按钮 - 橙色强调，提升转化率 */
.btn-cta {
  height: 56px;
  padding: 0 var(--space-lg);
  background: linear-gradient(135deg, var(--color-cta) 0%, var(--color-cta-dark) 100%);
  color: #FFFFFF;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(249, 115, 22, 0.35);
  border: none;
}

.btn-cta:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(249, 115, 22, 0.45);
  filter: brightness(1.08);
}

.btn-cta:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(249, 115, 22, 0.25);
}

/* 浅色主题 - CTA 按钮 */
[data-theme="light"] .btn-cta {
  box-shadow: 0 4px 14px rgba(234, 88, 12, 0.3);
}

[data-theme="light"] .btn-cta:hover:not(:disabled) {
  box-shadow: 0 8px 24px rgba(234, 88, 12, 0.4);
}

/* 文字按钮 */
.btn-text {
  height: auto;
  padding: var(--space-xs) 0;
  color: var(--color-text-secondary);
}

.btn-text:hover:not(:disabled) {
  color: var(--color-primary);
}

.btn-text:hover:not(:disabled) .arrow {
  transform: translateX(4px);
}

.btn .arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
}

/* ========== 输入框组件 Input ========== */
.input-group {
  margin-bottom: var(--space-md);
}

.input-group label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.input-group label.required::after {
  content: ' *';
  color: var(--color-error);
}

.input-group input,
.input-group textarea,
.input-group select {
  width: 100%;
  height: 48px;
  padding: 12px 16px;
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-size: 16px; /* 固定16px防止iOS自动缩放 */
  transition: all var(--transition-base);
}

/* 下拉选择 - 统一箭头，保证深浅色主题可见性 */
.input-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 24 24' fill='%23A8B3C8' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M7 10l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-sm) center;
  background-size: 20px 20px;
  padding-right: calc(var(--space-lg) + 16px);
}

[data-theme="light"] .input-group select {
  background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 24 24' fill='%236B7280' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M7 10l5 5 5-5'/%3E%3C/svg%3E");
}

.input-group select#rEducation option {
  background-color: #111827;
  color: #FFFFFF;
}

[data-theme="light"] .input-group select#rEducation option {
  background-color: #FFFFFF;
  color: #111827;
}

.input-group textarea {
  min-height: 120px;
  resize: vertical;
}

.input-group input:focus,
.input-group textarea:focus,
.input-group select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.input-group input::placeholder,
.input-group textarea::placeholder {
  color: var(--color-text-disabled);
}

.input-group input:disabled,
.input-group textarea:disabled,
.input-group select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.input-group.error input,
.input-group.error textarea,
.input-group.error select {
  border-color: var(--color-error);
}

.input-error {
  display: flex;
  align-items: center;
  gap: var(--space-xxs);
  font-size: var(--font-size-sm);
  color: var(--color-error);
  margin-top: var(--space-xxs);
}

/* ========== 卡片组件 Card ========== */
.card {
  background: var(--color-bg-dark);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  border: 1px solid rgba(148, 163, 184, 0.1);
  transition: all var(--transition-base);
  cursor: pointer;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-text-white);
}

.card p {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* 浅色主题 - 卡片样式优化 */
[data-theme="light"] .card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(229, 231, 235, 1);
  box-shadow: 0 2px 8px 0 rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 12px 24px -4px rgba(99, 102, 241, 0.15);
}

/* 浅色主题 - 玻璃卡片对比度增强 */
[data-theme="light"] .card-glass {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(229, 231, 235, 0.9);
}

/* 玻璃拟态卡片 */
.card-glass {
  background: rgba(30, 41, 59, 0.6);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: all var(--transition-base);
  cursor: pointer;
}

.card-glass:hover {
  background: rgba(30, 41, 59, 0.8);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* 产品卡片 */
.product-card {
  position: relative;
  background: var(--color-bg-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid rgba(148, 163, 184, 0.1);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-purple);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(139, 92, 246, 0.3);
}

.product-card-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-purple);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.product-card-icon svg {
  width: 32px;
  height: 32px;
  color: white;
}

/* ========== 标签组件 Tag ========== */
.tag {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 6px 12px;
  font-size: var(--font-size-xs);
  border-radius: var(--radius-xs);
  font-weight: 500;
}

.tag-primary {
  background: rgba(139, 92, 246, 0.1);
  color: var(--color-primary);
}

.tag-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
}

.tag-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
}

.tag-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
}

/* ========== Toast 通知 ========== */
.toast {
  position: fixed;
  top: 100px;
  left: 50%;
  transform: translateX(-50%);
  min-width: 300px;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-dark);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  z-index: 9999;
  animation: slideDown 300ms ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translate(-50%, -20px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

.toast.success {
  border-left: 4px solid var(--color-success);
}

.toast.error {
  border-left: 4px solid var(--color-error);
}

.toast.warning {
  border-left: 4px solid var(--color-warning);
}

/* ========== 模态框 Modal ========== */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--color-bg-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-xl);
  animation: modalFadeIn 300ms ease-out;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-xs);
  background: var(--color-bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-primary);
}

.modal-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-md);
  color: var(--color-text-white);
}

/* ========== 页面底部 Footer ========== */
.footer {
  background: var(--color-bg-deep);
  border-top: 1px solid var(--color-bg-hover);
  padding: var(--space-xxl) 0 var(--space-md);
}

/* 浅色主题 - Footer样式 */
[data-theme="light"] .footer {
  background: var(--color-bg-dark);
  border-top: 1px solid rgba(229, 231, 235, 0.8);
}

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

.footer-brand {
  max-width: 360px;
}

.footer-brand h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
}

.social-item {
  position: relative;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  color: var(--color-text-secondary);
}

.footer-social a:hover {
  background: var(--color-primary);
  color: #FFFFFF;
  transform: translateY(-2px);
}

/* 微信二维码弹出层 */
.qr-popup {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  width: 120px;
  padding: 10px;
  background: #FFFFFF;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 100;
  margin-bottom: 12px;
  text-align: center;
  pointer-events: none; /* 防止遮挡 */
}

.qr-popup::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px 6px 0;
  border-style: solid;
  border-color: #FFFFFF transparent transparent transparent;
}

.social-item:hover .qr-popup {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.qr-popup img {
  width: 100%;
  height: 100px; /* 占位高度 */
  object-fit: cover;
  background: #f1f5f9;
  margin-bottom: 6px;
  border-radius: var(--radius-xs);
}

.qr-large {
  display: block;
  width: min(80vw, 360px);
  height: auto;
  border-radius: var(--radius-md);
}

.qr-popup span {
  display: block;
  font-size: 12px;
  color: #333;
  line-height: 1.4;
  font-weight: 500;
}

.footer-links h4 {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-md);
  color: var(--color-text-white);
  font-weight: 600;
}

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

.footer-links li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

/* 联系电话突出显示 */
.footer-links a[href^="tel:"] {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary);
  display: inline-block;
  margin-top: var(--space-xs);
}

.footer-links a[href^="tel:"]:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-bg-hover);
  text-align: center;
}

.footer-bottom p {
  font-size: var(--font-size-xs);
  color: var(--color-text-disabled);
}

.footer-bottom a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

/* ========== 响应式设计 ========== */
@media (max-width: 1199px) {
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 767px) {
  .header {
    top: 8px;
    left: 8px;
    right: 8px;
    height: 56px;
    border-radius: var(--radius-md);
  }

  .menu-toggle {
    display: flex;
  }

  .header-nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 8px;
    right: 8px;
    width: auto;
    height: auto;
    max-height: calc(100vh - 88px);
    background: var(--color-bg-deep);
    border-radius: var(--radius-md);
    border: 1px solid rgba(148, 163, 184, 0.15);
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: var(--space-lg) 0;
    gap: var(--space-md);
    overflow-y: auto;
  }

  .header-nav.active {
    display: flex;
  }

  .header-nav a {
    font-size: var(--font-size-lg);
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: var(--space-sm) var(--space-lg);
  }

  .header-cta {
    margin-left: 0;
    width: 80%;
    margin-top: var(--space-sm);
  }

  .header-cta .btn {
    width: 100%;
    min-height: 48px;
  }

  .btn-primary-lg,
  .btn-primary-md {
    width: 100%;
    min-height: 48px;
  }

  /* 页面标题区移动端优化 */
  .page-hero {
    padding: calc(var(--space-xxl) + 72px) var(--space-sm) var(--space-xl);
  }

  .page-hero h1 {
    font-size: var(--font-size-2xl);
  }

  .page-hero p {
    font-size: var(--font-size-base);
  }

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

  .footer-brand {
    max-width: 100%;
  }

  /* Footer链接触摸目标优化 */
  .footer-links a {
    display: inline-block;
    min-height: 44px;
    line-height: 44px;
  }

  .footer-links li {
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .qr-large {
    width: min(92vw, 320px);
  }
}

.apply-section-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.apply-card {
  background: linear-gradient(180deg, rgba(17,24,39,0.96) 0%, rgba(15,23,42,0.92) 100%);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(148,163,184,0.14);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.apply-card-title {
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text-white);
  border-bottom: 1px solid rgba(148,163,184,0.12);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.apply-card-content {
  padding: var(--space-lg);
}

[data-theme="light"] .apply-card {
  background: #FFFFFF;
  border-color: rgba(229, 231, 235, 0.8);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}

[data-theme="light"] .apply-card-title {
  color: var(--color-text-primary);
  border-bottom-color: rgba(229,231,235,0.8);
}

@media (max-width: 1199px) {
  .apply-section-grid {
    grid-template-columns: 1fr;
  }
}

.form-row-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.form-row-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.form-row-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

@media (max-width: 1199px) {
  .form-row-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .form-row-2,
  .form-row-3,
  .form-row-4 {
    grid-template-columns: 1fr;
  }
}

/* ========== 返回顶部按钮 Back to Top ========== */
#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
  z-index: 999;
}

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

#back-to-top:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.45);
}

#back-to-top:active {
  transform: translateY(0);
}

#back-to-top svg {
  width: 24px;
  height: 24px;
}

/* 浅色主题 - 返回顶部按钮 */
[data-theme="light"] #back-to-top {
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.25);
}

[data-theme="light"] #back-to-top:hover {
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

/* 移动端适配 */
@media (max-width: 767px) {
  #back-to-top {
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
  }

  #back-to-top svg {
    width: 20px;
    height: 20px;
  }
}

/* ========== 移动端触摸优化 Touch Optimization ========== */
@media (max-width: 767px) {
  /* 防止双击缩放延迟 */
  button,
  a,
  .btn,
  input[type="button"],
  input[type="submit"] {
    touch-action: manipulation;
  }

  /* 确保所有可点击元素有足够的触摸区域 */
  .header-nav a,
  .footer-links a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  /* 防止iOS Safari自动放大字体 */
  html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
  }

  /* 平滑滚动 */
  html {
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
  }
}