* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --background: #f8f9fa;
  --card-bg: #ffffff;
  --second-bg: #f1f3f5;
  --font-color: #1a1a1a;
  --font-secondary: #6c757d;
  --green: #07c160;
  --green-light: rgba(7, 193, 96, 0.12);
  --red: #fa5151;
  --xiaohongshu: linear-gradient(135deg, #fe2c55, #ff4757);
  --divider-color: #e9ecef;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --background: #0d0d0d;
  --card-bg: #1a1a1a;
  --second-bg: #252525;
  --font-color: #e8e8e8;
  --font-secondary: #8e8e93;
  --divider-color: #38383a;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
  --green-light: rgba(7, 193, 96, 0.2);
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  background-color: var(--background);
  color: var(--font-color);
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
  line-height: 1.5;
}

.wechatOA {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px 100px;
}

.theme-switch-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
}

.theme-switch {
  width: 52px;
  height: 32px;
  cursor: pointer;
  position: relative;
  background: transparent;
  border: none;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  -webkit-tap-highlight-color: transparent;
  transition: background-color var(--transition-normal);
}

.theme-switch:hover {
  background: var(--shadow-md);
}

.theme-switch:active {
  transform: scale(0.95);
}

.switch-track {
  width: 100%;
  height: 100%;
  background: var(--second-bg);
  border-radius: 16px;
  position: relative;
  transition: background-color var(--transition-normal);
  border: 1px solid var(--divider-color);
  pointer-events: none;
}

.switch-thumb {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, #fff 0%, #f0f0f0 100%);
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: all var(--transition-smooth);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .switch-thumb {
  transform: translateX(20px);
  background: linear-gradient(135deg, #3a3a3c 0%, #2a2a2c 100%);
}

.wechat {
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.wechat-need-reply {
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  padding: 24px;
  text-align: center;
  border: 1px solid var(--divider-color);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-smooth);
}

.wechat-need-reply-front {
  font-size: 18px;
  font-weight: 700;
  color: var(--font-color);
  margin-bottom: 6px;
  letter-spacing: -0.3px;
}

.wechat-need-reply-back {
  font-size: 14px;
  font-weight: 500;
  color: var(--font-secondary);
  margin-bottom: 16px;
}

.wechat-need-reply-copybtn {
  background: var(--green);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 12px rgba(7, 193, 96, 0.3);
}

.wechat-need-reply-copybtn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(7, 193, 96, 0.4);
}

.wechat-need-reply-copybtn:active {
  transform: translateY(0);
}

.wechat-need-reply-copybtn-img {
  width: 18px;
  height: 18px;
}

.wechat-card {
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--divider-color);
  transition: all var(--transition-smooth);
  gap: 24px;
}

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

.qrcode {
  width: 200px;
  height: 200px;
  border-radius: var(--radius-lg);
  background: var(--second-bg);
  padding: 12px;
  transition: transform var(--transition-normal);
}

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

.tips {
  font-size: 14px;
  font-weight: 500;
  color: var(--font-secondary);
}

.wechatOA-card {
  width: 100%;
  background: var(--second-bg);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  gap: 14px;
  align-items: center;
  border: 1px solid var(--divider-color);
  transition: all var(--transition-normal);
}

.wechatOA-card:hover {
  border-color: var(--green);
  background: var(--green-light);
}

.wechatOA-head {
  min-width: 56px;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  flex-shrink: 0;
  object-fit: cover;
  box-shadow: var(--shadow-sm);
}

.wechatOA-info {
  flex: 1;
  min-width: 0;
}

.wechatOA-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--font-color);
  margin-bottom: 4px;
  letter-spacing: -0.2px;
}

.wechatOA-description {
  font-size: 13px;
  font-weight: 500;
  color: var(--font-secondary);
}

.wechat-id-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.wechat-id-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--font-secondary);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.wechat-id-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--second-bg);
  border: 1px solid var(--divider-color);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  transition: all var(--transition-normal);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.wechat-id-box:hover {
  border-color: var(--green);
  box-shadow: 0 0 0 3px var(--green-light);
}

.wechat-id-text {
  flex: 1;
  font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
  font-size: 16px;
  font-weight: 600;
  color: var(--font-color);
  word-break: break-all;
  letter-spacing: 0.5px;
}

.wechat-id-copy-btn {
  padding: 10px 16px;
  background: var(--green);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  letter-spacing: 0.3px;
  box-shadow: 0 2px 8px rgba(7, 193, 96, 0.3);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
}

.wechat-id-copy-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(7, 193, 96, 0.4);
}

.wechat-id-copy-btn:active {
  transform: translateY(0);
}

.wechat-id-copy-btn.copied {
  animation: copySuccess 0.5s ease-out;
}

.wechat-id-copy-btn.failed {
  background: var(--red);
  animation: copyFailed 0.5s ease-out;
}

@keyframes copySuccess {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

@keyframes copyFailed {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.wechat-jump-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

.wechat-jump-btn {
  width: 100%;
  background: var(--green);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  padding: 16px 24px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 16px rgba(7, 193, 96, 0.35);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
  letter-spacing: 0.3px;
}

.wechat-jump-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(7, 193, 96, 0.45);
}

.wechat-jump-btn:active {
  transform: translateY(0);
}

.wechat-icon {
  font-size: 20px;
}

.jump-tips {
  font-size: 12px;
  color: var(--font-secondary);
}

.custom-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  animation: fadeIn 0.25s ease-out;
  padding: 20px;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  padding: 28px;
  max-width: 340px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--font-color);
  margin: 0 0 16px 0;
  letter-spacing: -0.3px;
}

.modal-message {
  font-size: 15px;
  font-weight: 400;
  color: var(--font-secondary);
  line-height: 1.7;
  margin: 0 0 24px 0;
}

.modal-message strong {
  color: var(--font-color);
  font-weight: 600;
}

.modal-buttons {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

.modal-button {
  padding: 12px 20px;
  border: 1px solid var(--divider-color);
  background: var(--second-bg);
  color: var(--font-color);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 90px;
  text-align: center;
}

.modal-button:hover {
  background: var(--divider-color);
}

.modal-button.primary {
  background: var(--green);
  color: #ffffff;
  border-color: var(--green);
  box-shadow: 0 2px 8px rgba(7, 193, 96, 0.3);
}

.modal-button.primary:hover {
  box-shadow: 0 4px 12px rgba(7, 193, 96, 0.4);
}

.modal-button:active {
  transform: scale(0.97);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px;
  text-align: center;
  background: linear-gradient(180deg, transparent 0%, var(--background) 40%);
  z-index: 50;
  pointer-events: none;
}

.social-links {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  pointer-events: auto;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  background: var(--card-bg);
  color: var(--font-color);
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1px solid var(--divider-color);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition-normal);
  cursor: pointer;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
  box-shadow: var(--shadow-sm);
}

.social-link svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.social-link:hover {
  background: var(--green);
  color: #ffffff;
  border-color: var(--green);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.social-link:active {
  transform: translateY(0);
}

.social-link.xiaohongshu {
  background: var(--xiaohongshu);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(254, 44, 85, 0.35);
}

.social-link.xiaohongshu:hover {
  background: var(--xiaohongshu);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(254, 44, 85, 0.45);
}

@media (max-width: 420px) {
  .wechatOA {
    padding: 50px 16px 90px;
  }
  
  .wechat-card {
    padding: 28px 20px;
    gap: 20px;
  }
  
  .qrcode {
    width: 180px;
    height: 180px;
  }
  
  .wechat-need-reply {
    padding: 20px;
  }
  
  .wechat-id-text {
    font-size: 14px;
  }
  
  .wechat-jump-btn {
    padding: 14px 20px;
    font-size: 15px;
  }
}