/**
 * 纤伴益生菌 AI 官网 - 公共组件样式
 * 包含: 按钮、卡片、弹窗、导航栏、AI聊天窗、表单、标签
 */

/* ==================== 导航栏 ==================== */
.qianban-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--qianban-header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  transition: var(--qianban-transition);
  border-bottom: 1px solid rgba(232, 76, 136, 0.08);
}

.qianban-navbar--scrolled {
  box-shadow: var(--qianban-shadow-md);
}

.qianban-navbar__inner {
  max-width: var(--qianban-max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--qianban-space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.qianban-navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--qianban-space-sm);
  font-size: 20px;
  font-weight: 700;
  color: var(--qianban-color-primary);
}

.qianban-navbar__logo-icon {
  width: 36px;
  height: 36px;
  background: var(--qianban-gradient-primary);
  border-radius: var(--qianban-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
}

.qianban-navbar__menu {
  display: none;
  align-items: center;
  gap: var(--qianban-space-lg);
}

.qianban-navbar__menu a {
  font-size: var(--qianban-font-small);
  color: var(--qianban-color-text);
  font-weight: 500;
  position: relative;
  padding: var(--qianban-space-sm) 0;
}

.qianban-navbar__menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--qianban-color-primary);
  transform: scaleX(0);
  transition: var(--qianban-transition-fast);
}

.qianban-navbar__menu a:hover::after,
.qianban-navbar__menu a.qianban-active::after {
  transform: scaleX(1);
}

.qianban-navbar__menu a.qianban-active {
  color: var(--qianban-color-primary);
}

.qianban-navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--qianban-space-sm);
}

.qianban-navbar__toggle {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 28px;
  height: 28px;
  justify-content: center;
}

.qianban-navbar__toggle span {
  display: block;
  height: 2px;
  background: var(--qianban-color-text);
  border-radius: 2px;
  transition: var(--qianban-transition-fast);
}

.qianban-navbar__toggle.qianban-active span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

.qianban-navbar__toggle.qianban-active span:nth-child(2) {
  opacity: 0;
}

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

/* 移动端下拉菜单 */
.qianban-mobile-menu {
  position: fixed;
  top: var(--qianban-header-height);
  left: 0;
  right: 0;
  background: #fff;
  z-index: 999;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: var(--qianban-transition);
  box-shadow: var(--qianban-shadow-lg);
}

.qianban-mobile-menu.qianban-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.qianban-mobile-menu a {
  display: block;
  padding: var(--qianban-space-md) var(--qianban-space-lg);
  font-size: var(--qianban-font-body);
  color: var(--qianban-color-text);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: var(--qianban-transition-fast);
}

.qianban-mobile-menu a:hover {
  background: var(--qianban-color-bg);
  color: var(--qianban-color-primary);
  padding-left: var(--qianban-space-xl);
}

@media (min-width: 1024px) {
  .qianban-navbar__menu { display: flex; }
  .qianban-navbar__toggle { display: none; }
}

/* ==================== 按钮 ==================== */
.qianban-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--qianban-space-sm);
  height: 48px;
  padding: 0 var(--qianban-space-xl);
  font-size: var(--qianban-font-body);
  font-weight: 600;
  border-radius: var(--qianban-radius-md);
  transition: var(--qianban-transition);
  cursor: pointer;
  white-space: nowrap;
  border: none;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

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

/* 主按钮 - 粉色填充 */
.qianban-btn--primary {
  background: var(--qianban-gradient-primary);
  color: #fff;
  box-shadow: var(--qianban-shadow-lg);
}

.qianban-btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--qianban-shadow-xl);
  color: #fff;
}

.qianban-btn--primary:active {
  transform: translateY(0);
}

/* 次按钮 - 粉色描边 */
.qianban-btn--secondary {
  background: #fff;
  color: var(--qianban-color-primary);
  border: 2px solid var(--qianban-color-primary);
}

.qianban-btn--secondary:hover {
  background: var(--qianban-color-bg);
  transform: translateY(-2px);
}

/* 金色按钮 */
.qianban-btn--gold {
  background: var(--qianban-gradient-gold);
  color: #fff;
  box-shadow: var(--qianban-shadow-gold);
}

.qianban-btn--gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(201,169,110,0.35);
  color: #fff;
}

/* 蓝色按钮 */
.qianban-btn--blue {
  background: var(--qianban-gradient-blue);
  color: #fff;
}

.qianban-btn--blue:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(74,144,217,0.3);
  color: #fff;
}

/* 幽灵按钮 */
.qianban-btn--ghost {
  background: transparent;
  color: var(--qianban-color-text);
}

.qianban-btn--ghost:hover {
  background: rgba(0,0,0,0.05);
}

/* 全宽按钮 */
.qianban-btn--block {
  width: 100%;
}

/* 大尺寸按钮 */
.qianban-btn--lg {
  height: 56px;
  font-size: 18px;
  padding: 0 var(--qianban-space-2xl);
  border-radius: var(--qianban-radius-lg);
}

/* 小尺寸按钮 */
.qianban-btn--sm {
  height: 36px;
  font-size: var(--qianban-font-small);
  padding: 0 var(--qianban-space-md);
  border-radius: var(--qianban-radius-sm);
}

/* ==================== 卡片 ==================== */
.qianban-card {
  background: #fff;
  border-radius: var(--qianban-radius-lg);
  box-shadow: var(--qianban-shadow-md);
  overflow: hidden;
  transition: var(--qianban-transition);
}

.qianban-card--hover:hover {
  transform: translateY(-8px);
  box-shadow: var(--qianban-shadow-xl);
}

.qianban-card--padded {
  padding: var(--qianban-space-lg);
}

.qianban-card--highlight {
  border: 2px solid var(--qianban-color-primary);
  position: relative;
}

.qianban-card__badge {
  position: absolute;
  top: var(--qianban-space-md);
  right: var(--qianban-space-md);
  background: var(--qianban-gradient-primary);
  color: #fff;
  font-size: var(--qianban-font-tiny);
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--qianban-radius-full);
  z-index: 1;
}

.qianban-card__badge--gold {
  background: var(--qianban-gradient-gold);
}

.qianban-card__badge--blue {
  background: var(--qianban-gradient-blue);
}

/* ==================== 标签 ==================== */
.qianban-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  font-size: var(--qianban-font-tiny);
  border-radius: var(--qianban-radius-full);
  font-weight: 500;
}

.qianban-tag--primary {
  background: rgba(232, 76, 136, 0.1);
  color: var(--qianban-color-primary);
}

.qianban-tag--gold {
  background: rgba(201, 169, 110, 0.12);
  color: var(--qianban-color-gold);
}

.qianban-tag--blue {
  background: rgba(74, 144, 217, 0.1);
  color: var(--qianban-color-blue);
}

.qianban-tag--success {
  background: rgba(82, 196, 26, 0.1);
  color: var(--qianban-color-success);
}

.qianban-tag--warning {
  background: rgba(250, 140, 22, 0.1);
  color: var(--qianban-color-warning);
}

/* ==================== 表单 ==================== */
.qianban-form-group {
  margin-bottom: var(--qianban-space-md);
}

.qianban-form-label {
  display: block;
  font-size: var(--qianban-font-small);
  font-weight: 500;
  color: var(--qianban-color-text);
  margin-bottom: var(--qianban-space-sm);
}

.qianban-form-input,
.qianban-form-textarea,
.qianban-form-select {
  width: 100%;
  height: 48px;
  padding: 0 var(--qianban-space-md);
  font-size: var(--qianban-font-body);
  border: 2px solid #E8E8E8;
  border-radius: var(--qianban-radius-md);
  background: #fff;
  color: var(--qianban-color-text);
  transition: var(--qianban-transition-fast);
  outline: none;
}

.qianban-form-textarea {
  height: auto;
  padding: var(--qianban-space-md);
  min-height: 100px;
  resize: vertical;
}

.qianban-form-input:focus,
.qianban-form-textarea:focus,
.qianban-form-select:focus {
  border-color: var(--qianban-color-primary);
  box-shadow: 0 0 0 3px rgba(232, 76, 136, 0.1);
}

.qianban-form-input::placeholder,
.qianban-form-textarea::placeholder {
  color: var(--qianban-color-text-light);
}

.qianban-form-error {
  font-size: var(--qianban-font-tiny);
  color: var(--qianban-color-danger);
  margin-top: 4px;
  display: none;
}

.qianban-form-error.qianban-show {
  display: block;
}

.qianban-form-input.qianban-error,
.qianban-form-textarea.qianban-error {
  border-color: var(--qianban-color-danger);
}

/* 复选框 */
.qianban-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--qianban-space-sm);
  cursor: pointer;
  font-size: var(--qianban-font-small);
  color: var(--qianban-color-text-secondary);
}

.qianban-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--qianban-color-primary);
  cursor: pointer;
  flex-shrink: 0;
}

.qianban-checkbox a {
  color: var(--qianban-color-primary);
  text-decoration: underline;
}

/* ==================== 弹窗 ==================== */
.qianban-popup-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 5000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--qianban-space-lg);
  opacity: 0;
  visibility: hidden;
  transition: var(--qianban-transition);
}

.qianban-popup-overlay.qianban-show {
  opacity: 1;
  visibility: visible;
}

.qianban-popup {
  background: #fff;
  border-radius: var(--qianban-radius-lg);
  max-width: 440px;
  width: 100%;
  overflow: hidden;
  box-shadow: var(--qianban-shadow-xl);
  transform: scale(0.9);
  transition: var(--qianban-transition);
  position: relative;
}

.qianban-popup-overlay.qianban-show .qianban-popup {
  transform: scale(1);
}

.qianban-popup__close {
  position: absolute;
  top: var(--qianban-space-sm);
  right: var(--qianban-space-sm);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(0,0,0,0.05);
  color: var(--qianban-color-text-secondary);
  font-size: 18px;
  z-index: 2;
  transition: var(--qianban-transition-fast);
}

.qianban-popup__close:hover {
  background: rgba(0,0,0,0.1);
}

.qianban-popup__header {
  padding: var(--qianban-space-xl) var(--qianban-space-xl) var(--qianban-space-md);
  text-align: center;
  background: var(--qianban-gradient-hero);
}

.qianban-popup__icon {
  font-size: 48px;
  margin-bottom: var(--qianban-space-sm);
}

.qianban-popup__title {
  font-size: var(--qianban-font-h3);
  font-weight: 700;
  color: var(--qianban-color-text);
}

.qianban-popup__body {
  padding: var(--qianban-space-lg) var(--qianban-space-xl) var(--qianban-space-xl);
  text-align: center;
}

.qianban-popup__desc {
  font-size: var(--qianban-font-body);
  color: var(--qianban-color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--qianban-space-lg);
}

.qianban-popup__discount {
  display: inline-block;
  background: var(--qianban-gradient-gold);
  color: #fff;
  font-size: var(--qianban-font-h3);
  font-weight: 700;
  padding: var(--qianban-space-sm) var(--qianban-space-xl);
  border-radius: var(--qianban-radius-full);
  margin-bottom: var(--qianban-space-lg);
}

.qianban-popup__actions {
  display: flex;
  flex-direction: column;
  gap: var(--qianban-space-sm);
}

/* ==================== AI 聊天窗 ==================== */
.qianban-chat-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--qianban-gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  box-shadow: 0 6px 20px rgba(232,76,136,0.4);
  cursor: pointer;
  z-index: 4000;
  transition: var(--qianban-transition);
  border: none;
}

.qianban-chat-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 28px rgba(232,76,136,0.5);
}

.qianban-chat-fab.qianban-hidden {
  display: none;
}

.qianban-chat-fab__pulse {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 50%;
  border: 2px solid var(--qianban-color-primary);
  animation: qianban-pulse 2s ease-in-out infinite;
}

.qianban-chat-fab__badge {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 20px;
  height: 20px;
  background: var(--qianban-color-warning);
  color: #fff;
  border-radius: var(--qianban-radius-full);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 5px;
  border: 2px solid #fff;
}

.qianban-chat-window {
  position: fixed;
  bottom: 0;
  right: 0;
  width: 100%;
  max-width: 400px;
  height: 100vh;
  max-height: 600px;
  background: #fff;
  border-radius: var(--qianban-radius-lg) var(--qianban-radius-lg) 0 0;
  box-shadow: 0 -4px 40px rgba(0,0,0,0.15);
  z-index: 4001;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  opacity: 0;
  visibility: hidden;
  transition: var(--qianban-transition);
}

.qianban-chat-window.qianban-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.qianban-chat-header {
  display: flex;
  align-items: center;
  gap: var(--qianban-space-sm);
  padding: var(--qianban-space-md) var(--qianban-space-lg);
  background: var(--qianban-gradient-primary);
  color: #fff;
  border-radius: var(--qianban-radius-lg) var(--qianban-radius-lg) 0 0;
  flex-shrink: 0;
}

.qianban-chat-header__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.qianban-chat-header__info {
  flex: 1;
  min-width: 0;
}

.qianban-chat-header__name {
  font-size: var(--qianban-font-body);
  font-weight: 700;
}

.qianban-chat-header__status {
  font-size: var(--qianban-font-tiny);
  opacity: 0.85;
  display: flex;
  align-items: center;
  gap: 4px;
}

.qianban-chat-header__status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #52C41A;
  display: inline-block;
}

.qianban-chat-header__close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  font-size: 16px;
  color: #fff;
  cursor: pointer;
  transition: var(--qianban-transition-fast);
}

.qianban-chat-header__close:hover {
  background: rgba(255,255,255,0.25);
}

.qianban-chat-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--qianban-space-md);
  background: var(--qianban-color-bg);
  display: flex;
  flex-direction: column;
  gap: var(--qianban-space-sm);
}

.qianban-chat-message {
  display: flex;
  gap: var(--qianban-space-sm);
  max-width: 85%;
  animation: qianban-fade-in 0.3s ease;
}

.qianban-chat-message--user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.qianban-chat-message__avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.qianban-chat-message--assistant .qianban-chat-message__avatar {
  background: var(--qianban-gradient-primary);
  color: #fff;
}

.qianban-chat-message--user .qianban-chat-message__avatar {
  background: var(--qianban-color-bg-gray);
  color: var(--qianban-color-text-secondary);
}

.qianban-chat-message__bubble {
  padding: var(--qianban-space-sm) var(--qianban-space-md);
  border-radius: var(--qianban-radius-md);
  font-size: var(--qianban-font-small);
  line-height: 1.6;
  word-break: break-word;
  white-space: pre-wrap;
}

.qianban-chat-message--assistant .qianban-chat-message__bubble {
  background: #fff;
  color: var(--qianban-color-text);
  border-top-left-radius: var(--qianban-radius-sm);
  box-shadow: var(--qianban-shadow-sm);
}

.qianban-chat-message--user .qianban-chat-message__bubble {
  background: var(--qianban-gradient-primary);
  color: #fff;
  border-top-right-radius: var(--qianban-radius-sm);
}

.qianban-chat-message__bubble--typing {
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 28px;
}

.qianban-chat-typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--qianban-color-text-light);
  animation: qianban-bounce 1s ease-in-out infinite;
}

.qianban-chat-typing-dot:nth-child(2) { animation-delay: 0.15s; }
.qianban-chat-typing-dot:nth-child(3) { animation-delay: 0.3s; }

.qianban-chat-quick {
  padding: var(--qianban-space-sm) var(--qianban-space-md);
  display: flex;
  flex-wrap: wrap;
  gap: var(--qianban-space-sm);
  background: #fff;
  border-top: 1px solid rgba(0,0,0,0.05);
  flex-shrink: 0;
}

.qianban-chat-quick__btn {
  padding: 6px 12px;
  font-size: var(--qianban-font-tiny);
  color: var(--qianban-color-primary);
  background: rgba(232,76,136,0.08);
  border-radius: var(--qianban-radius-full);
  border: 1px solid rgba(232,76,136,0.15);
  cursor: pointer;
  transition: var(--qianban-transition-fast);
  white-space: nowrap;
}

.qianban-chat-quick__btn:hover {
  background: rgba(232,76,136,0.15);
}

.qianban-chat-input {
  display: flex;
  gap: var(--qianban-space-sm);
  padding: var(--qianban-space-sm) var(--qianban-space-md);
  background: #fff;
  border-top: 1px solid rgba(0,0,0,0.05);
  flex-shrink: 0;
}

.qianban-chat-input__field {
  flex: 1;
  height: 40px;
  padding: 0 var(--qianban-space-md);
  border: 2px solid #E8E8E8;
  border-radius: var(--qianban-radius-full);
  font-size: var(--qianban-font-small);
  outline: none;
  transition: var(--qianban-transition-fast);
}

.qianban-chat-input__field:focus {
  border-color: var(--qianban-color-primary);
}

.qianban-chat-input__send {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--qianban-gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  border: none;
  cursor: pointer;
  transition: var(--qianban-transition-fast);
  flex-shrink: 0;
}

.qianban-chat-input__send:hover {
  transform: scale(1.05);
}

.qianban-chat-input__send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* 移动端聊天窗全屏 */
@media (max-width: 480px) {
  .qianban-chat-window {
    max-width: 100%;
    max-height: 100vh;
    border-radius: 0;
  }
}

/* ==================== Toast 提示 ==================== */
.qianban-toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  padding: var(--qianban-space-sm) var(--qianban-space-lg);
  border-radius: var(--qianban-radius-md);
  font-size: var(--qianban-font-small);
  font-weight: 500;
  z-index: 6000;
  opacity: 0;
  visibility: hidden;
  transition: var(--qianban-transition);
  box-shadow: var(--qianban-shadow-lg);
  max-width: 90%;
}

.qianban-toast.qianban-show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.qianban-toast--success {
  background: var(--qianban-color-success);
  color: #fff;
}

.qianban-toast--error {
  background: var(--qianban-color-danger);
  color: #fff;
}

.qianban-toast--warning {
  background: var(--qianban-color-warning);
  color: #fff;
}

.qianban-toast--info {
  background: var(--qianban-color-blue);
  color: #fff;
}

/* ==================== 价格展示 ==================== */
.qianban-price {
  display: flex;
  align-items: baseline;
  gap: var(--qianban-space-sm);
}

.qianban-price__current {
  font-size: 32px;
  font-weight: 700;
  color: var(--qianban-color-primary);
}

.qianban-price__current::before {
  content: '¥';
  font-size: 18px;
  font-weight: 500;
}

.qianban-price__original {
  font-size: var(--qianban-font-small);
  color: var(--qianban-color-text-light);
  text-decoration: line-through;
}

/* ==================== 评分星星 ==================== */
.qianban-stars {
  display: inline-flex;
  gap: 2px;
  color: var(--qianban-color-gold);
  font-size: 16px;
}

.qianban-stars i {
  line-height: 1;
}

/* ==================== 网格布局 ==================== */
.qianban-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--qianban-space-md);
}

@media (min-width: 768px) {
  .qianban-grid--2 { grid-template-columns: repeat(2, 1fr); }
  .qianban-grid--3 { grid-template-columns: repeat(3, 1fr); }
  .qianban-grid--4 { grid-template-columns: repeat(4, 1fr); }
}