/* =========================================================================
   VeriLab 设计系统 — 中蓝灰科技风
   依据 A-FINAL-FROZEN-V11.txt 第三章「页面美观优化规范」编写。
   ========================================================================= */

/* ---------- 1. 设计变量（颜色 / 字体 / 圆角 / 阴影 / 边框 / z-index） ---------- */
:root {
  /* 颜色 */
  --color-bg: #1E293B;
  --color-card-bg: rgba(41, 53, 72, 0.85);
  --color-navbar-bg: rgba(30, 41, 59, 0.85);
  --color-navbar-bg-scrolled: rgba(30, 41, 59, 0.95);
  --color-dropdown-bg: rgba(30, 41, 59, 0.95);
  --color-pill-bg: rgba(41, 53, 72, 0.7);

  --color-text-primary: #E2E8F0;
  --color-text-secondary: #94A3B8;
  --color-text-on-primary: #FFFFFF;

  --color-primary: #3B82F6;
  --color-primary-dark: #2563EB;
  --color-accent: #22D3EE;
  --color-success: #4ADE80;
  --color-error: #F87171;

  --color-border: rgba(148, 163, 184, 0.15);
  --color-border-strong: rgba(148, 163, 184, 0.25);
  --color-border-primary: rgba(59, 130, 246, 0.5);

  /* 字体 */
  --font-title: 'Space Grotesk', 'Inter', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-numeric: 'Space Grotesk', 'Inter', -apple-system, sans-serif;

  /* 圆角 */
  --radius-card: 12px;
  --radius-button: 8px;
  --radius-input: 6px;
  --radius-pill: 20px;

  /* 阴影 / 边框 / 毛玻璃 */
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
  --blur-glass: blur(12px);
  --blur-glass-strong: blur(16px);

  /* 发光 */
  --glow-primary: 0 0 20px rgba(59, 130, 246, 0.6);
  --glow-primary-soft: 0 0 12px rgba(59, 130, 246, 0.3);
  --glow-accent: 0 0 12px rgba(34, 211, 238, 0.5);
  --glow-error: 0 0 10px rgba(248, 113, 113, 0.6);

  /* 层级关系（z-index），见第三章「层级关系」 */
  --z-age-verification: 9999;
  --z-chat-widget: 700;
  --z-user-menu: 600;
  --z-floating-icons: 450;
  --z-navbar: 500;
  --z-deals-banner: 400;

  /* 过渡 */
  --transition-fast: all 0.2s ease;
  --transition-medium: all 0.3s ease;
}

/* ---------- 2. 基础重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-title);
  margin: 0 0 0.5em;
  color: var(--color-text-primary);
}

p {
  margin: 0 0 1em;
  color: var(--color-text-secondary);
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

button {
  font-family: var(--font-body);
  cursor: pointer;
}

input,
select,
textarea {
  font-family: var(--font-body);
}

.text-numeric {
  font-family: var(--font-numeric);
}

/* 键盘导航：焦点可见（无障碍要求） */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ---------- 3. 毛玻璃效果 ---------- */
.glass {
  background: var(--color-card-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--color-border);
}

.glass-strong {
  background: var(--color-dropdown-bg);
  backdrop-filter: var(--blur-glass-strong);
  -webkit-backdrop-filter: var(--blur-glass-strong);
  border: 1px solid var(--color-border);
}

/* 旧浏览器降级：不支持 backdrop-filter 时退化为半透明深色纯色背景 */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass,
  .glass-strong,
  .navbar,
  .user-pill,
  .modal,
  .age-gate__card {
    background: rgba(20, 28, 42, 0.96);
  }
}

/* ---------- 4. 卡片 ---------- */
.card {
  background: var(--color-card-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: var(--transition-fast);
}

.card--hoverable:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 20px;
  border: none;
  border-radius: var(--radius-button);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition-fast);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* 主按钮：电光蓝到深蓝渐变 */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-text-on-primary);
  border: 1px solid rgba(59, 130, 246, 0.4);
}

.btn-primary:hover:not(:disabled) {
  filter: brightness(1.1);
  box-shadow: var(--glow-primary);
  transform: translateY(-2px);
}

.btn-primary:active:not(:disabled) {
  transform: scale(0.98);
  box-shadow: var(--glow-primary-soft);
}

/* 次按钮：描边霓虹青 */
.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(34, 211, 238, 0.12);
}

/* 灰色描边按钮（如年龄验证「Exit」按钮） */
.btn-outline-muted {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-strong);
}

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

/* 危险按钮：霓虹红 */
.btn-danger {
  background: var(--color-error);
  color: var(--color-text-on-primary);
}

.btn-danger:hover:not(:disabled) {
  filter: brightness(1.1);
  box-shadow: var(--glow-error);
}

.btn-loading {
  color: transparent !important;
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin: -8px 0 0 -8px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
}

@keyframes btn-spin {
  to {
    transform: rotate(360deg);
  }
}

/* 按钮涟漪效果 */
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  background: rgba(255, 255, 255, 0.35);
  animation: btn-ripple 0.6s ease-out;
  pointer-events: none;
}

@keyframes btn-ripple {
  to {
    transform: scale(3);
    opacity: 0;
  }
}

/* ---------- 6. 表单元素 ---------- */
.input {
  width: 100%;
  height: 40px;
  padding: 0 12px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border-strong);
  background: rgba(15, 23, 42, 0.6);
  color: var(--color-text-primary);
  transition: var(--transition-fast);
}

.input::placeholder {
  color: var(--color-text-secondary);
}

.input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
  outline: none;
}

.input.input--error {
  border-color: var(--color-error);
}

/* 移动端避免 input 字体 <16px 时浏览器自动放大页面 */
@media (max-width: 768px) {
  input,
  textarea,
  select {
    font-size: 16px !important;
  }
}

.field-error {
  color: var(--color-error);
  font-size: 12px;
  margin-top: 4px;
}

.field-warning {
  color: #FBBF24;
  font-size: 12px;
  margin-top: 4px;
}

/* ---------- 7. 弹窗（Modal）基础与各类尺寸规范 ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-user-menu);
  opacity: 0;
  animation: modal-fade-in 0.2s ease forwards;
  cursor: pointer;
}

.modal-overlay.closing {
  animation: modal-fade-out 0.2s ease forwards;
}

@keyframes modal-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes modal-fade-out {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

.modal {
  background: var(--color-dropdown-bg);
  backdrop-filter: var(--blur-glass-strong);
  -webkit-backdrop-filter: var(--blur-glass-strong);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transform: scale(0.96);
  opacity: 0;
  animation: modal-pop-in 0.2s ease forwards;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  cursor: default;
}

@keyframes modal-pop-in {
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(148, 163, 184, 0.1);
  color: var(--color-text-secondary);
  border: none;
  transition: var(--transition-fast);
  z-index: 5;
}

.modal-close:hover {
  background: rgba(248, 113, 113, 0.15);
  color: var(--color-error);
}

/* 各类弹窗固定尺寸（第三章「弹窗」+ 第九章板块/COA/支付弹窗规范） */
.modal-product { width: 1000px; max-height: 85vh; }

/* 购物车弹窗：右侧滑出（覆盖 .modal 默认的缩放淡入），见 DEV-TODO.md #1 */
.modal-cart {
  width: 420px;
  margin-left: auto;
  margin-right: 0;
  height: 100vh;
  max-height: 100vh;
  border-radius: 0;
  transform: translateX(100%);
  opacity: 1;
  animation: cart-slide-in 0.3s ease forwards;
}

@keyframes cart-slide-in {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

/* 关闭时：.closing 加在 .modal-overlay 上（见各 xxxModal.js 的 close 函数统一约定），
   这里用后代选择器让购物车弹窗在关闭过程中反向滑出，而不是仅靠遮罩淡出。 */
.modal-overlay.closing .modal-cart {
  animation: cart-slide-out 0.25s ease forwards;
}

@keyframes cart-slide-out {
  from { transform: translateX(0); }
  to { transform: translateX(100%); }
}

.modal-auth { width: 400px; border-radius: var(--radius-card); }

.modal-overlay--confirm {
  z-index: calc(var(--z-user-menu) + 40);
}

.modal-confirm {
  width: 400px;
  overflow: hidden;
}

.confirm-modal {
  padding: 28px 28px 24px;
}

.confirm-modal__title {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  margin: 0 36px 12px 0;
}

.confirm-modal__message {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0 0 24px;
  white-space: pre-wrap;
}

.confirm-modal__actions {
  display: flex;
  gap: 12px;
}

.confirm-modal__actions .btn {
  flex: 1;
  margin-top: 0;
}

/* 个人中心弹窗（第十四章）：固定尺寸，切换模块时不改变窗口大小，
   只有 .account-modal__content 内部滚动，因此覆盖 .modal 默认的 overflow-y。 */
.modal-account {
  width: 600px;
  height: 500px;
  max-height: 500px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#account-modal-overlay {
  z-index: calc(var(--z-user-menu) + 30);
}
.modal-section { width: 900px; height: 600px; }
.modal-coa { width: 700px; height: 500px; }
.modal-payment { width: 480px; }
.modal-address,
.modal-paypal-email,
.modal-order-summary { width: 480px; }

body.modal-open {
  overflow: hidden; /* 防滚动穿透 */
}

@media (max-width: 768px) {
  .modal-product,
  .modal-section,
  .modal-coa {
    width: 95%;
    height: 85vh;
    max-height: 85vh;
  }

  .modal-cart {
    width: 100%;
  }

  .modal-payment,
  .modal-address,
  .modal-paypal-email,
  .modal-order-summary,
  .modal-confirm,
  .modal-auth,
  .modal-tracking {
    width: 90%;
  }

  /* 移动端屏幕宽度普遍小于 600px，固定宽度会溢出视口，因此改为 95% 宽度，
     高度也随之改为视口相对值（仍然是"切换模块时窗口大小不变"的固定尺寸，
     只是这个固定尺寸本身随断点适配）。 */
  .modal-account {
    width: 95%;
    height: 80vh;
    max-height: 80vh;
  }

  .modal-account .modal-close {
    width: 44px;
    height: 44px;
    top: 8px;
    right: 8px;
    font-size: 22px;
    z-index: 20;
    background: rgba(148, 163, 184, 0.25);
  }

  /* 关闭按钮始终浮在内容之上，避开 iOS Safari 地址栏；配合左滑关闭手势 */
  .modal-overlay {
    padding-top: env(safe-area-inset-top, 0px);
    align-items: flex-start;
  }

  .modal-close {
    position: sticky;
    top: max(8px, env(safe-area-inset-top, 0px));
    float: right;
    width: 44px;
    height: 44px;
    margin: 6px 6px 0 0;
    font-size: 22px;
    z-index: 80;
    background: rgba(15, 23, 42, 0.92);
  }

  .modal-cart {
    height: 100dvh;
    max-height: 100dvh;
    padding-top: env(safe-area-inset-top, 0px);
  }

  .modal-cart .modal-close {
    position: sticky;
    float: none;
    margin-left: auto;
  }
}

/* ---------- 8. 顶部导航栏 ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: var(--color-navbar-bg);
  backdrop-filter: var(--blur-glass-strong);
  -webkit-backdrop-filter: var(--blur-glass-strong);
  border-bottom: 1px solid;
  border-image: linear-gradient(90deg, transparent, rgba(148, 163, 184, 0.3), transparent) 1;
  z-index: var(--z-navbar);
  transition: var(--transition-medium);
}

.navbar.scrolled {
  background: var(--color-navbar-bg-scrolled);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.navbar__logo {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 700;
  background: linear-gradient(90deg, #FFFFFF, var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-stroke: 0.55px rgba(255, 255, 255, 0.55);
  paint-order: stroke fill;
  filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.55));
  letter-spacing: 0.4px;
}

.brand-loader {
  position: fixed;
  inset: 0;
  background: #1E293B;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9998;
}

.brand-loader[hidden] {
  display: none;
}

.brand-loader__logo {
  font-size: 40px;
}

.navbar__links {
  display: flex;
  gap: 4px;
}

.navbar__link {
  position: relative;
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  padding: 8px 14px;
  border-radius: 6px;
  transition: var(--transition-fast);
}

.navbar__link::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  background: var(--color-accent);
  box-shadow: var(--glow-accent);
  width: 0;
  transition: width 0.25s ease;
}

.navbar__link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.navbar__link:hover::after {
  width: calc(100% - 28px);
}

.navbar__link.active {
  color: #fff;
  background: rgba(59, 130, 246, 0.1);
}

.navbar__link.active::after {
  width: calc(100% - 28px);
}

/* ---------- 9. 认证按钮 / 用户胶囊 / 下拉菜单 ---------- */
.btn-auth {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  border-radius: var(--radius-button);
  height: 40px;
  width: 150px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid rgba(147, 197, 253, 0.4);
  transition: var(--transition-fast);
}

.btn-auth:hover {
  filter: brightness(1.1);
  box-shadow: var(--glow-primary);
  transform: translateY(-2px);
}

.btn-auth:active {
  transform: scale(0.98);
}

.user-pill {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-pill-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-pill);
  padding: 6px 10px 6px 6px;
  transition: var(--transition-fast);
  cursor: pointer;
}

.user-pill[hidden] {
  display: none;
}

.user-pill:hover {
  border-color: var(--color-border-primary);
  box-shadow: var(--glow-primary-soft);
}

.user-pill__avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  box-shadow: inset 0 0 8px rgba(255, 255, 255, 0.25);
}

.user-pill__avatar--spin {
  animation: pill-spin-once 3s ease-out 1;
}

@keyframes pill-spin-once {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.user-pill__name {
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-pill__caret {
  color: var(--color-text-secondary);
  font-size: 12px;
  transition: transform 0.2s ease;
}

.user-pill.open .user-pill__caret {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 200px;
  background: var(--color-dropdown-bg);
  backdrop-filter: var(--blur-glass-strong);
  -webkit-backdrop-filter: var(--blur-glass-strong);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  z-index: var(--z-user-menu);
  opacity: 0;
  transform: translateY(-2px);
  animation: dropdown-in 0.2s ease forwards;
  overflow: hidden;
}

.dropdown-menu.dropdown-menu--portal {
  position: fixed;
  top: 64px;
  right: 0;
  bottom: 0;
  left: auto;
  width: 280px;
  max-width: 100%;
  border-radius: 0;
  z-index: calc(var(--z-user-menu) + 10);
  overflow-y: auto;
  opacity: 1;
  transform: none;
}

@keyframes dropdown-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.dropdown-menu__item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  height: 40px;
  padding: 0 14px;
  color: #fff;
  font-size: 14px;
  font-family: inherit;
  background: none;
  border: none;
  text-align: left;
  position: relative;
}

.dropdown-menu__item svg,
.dropdown-menu__item .icon {
  color: var(--color-accent);
  flex-shrink: 0;
}

.dropdown-menu__item:hover {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-accent);
}

.dropdown-menu__item[hidden],
.dropdown-menu__divider[hidden],
.dropdown-menu__verify[hidden] {
  display: none;
}

.dropdown-menu__verify {
  margin: 0;
  padding: 10px 14px 8px;
  font-size: 12px;
  line-height: 1.4;
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-border);
}

.dropdown-menu__divider {
  height: 1px;
  margin: 4px 0;
  background: linear-gradient(90deg, transparent, rgba(148, 163, 184, 0.3), transparent);
}

.dropdown-menu__badge {
  margin-left: auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-error);
  box-shadow: var(--glow-error);
}

/* ---------- 10. 右侧浮动图标（购物车 / FB / 聊天） ---------- */
.floating-icons {
  position: fixed;
  right: 24px;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: var(--z-floating-icons);
}

.floating-icon {
  position: relative;
  width: 52px;
  height: 52px;
  min-width: 52px;
  min-height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-card-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  transition: var(--transition-fast);
  /* 该类同时用于 <button>（购物车/聊天）和 <a>（FB Messenger 外链），
     统一重置颜色/光标/下划线，避免浏览器默认的链接蓝色和下划线露出。 */
  color: var(--color-text-secondary);
  text-decoration: none;
  cursor: pointer;
}

.floating-icon:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-primary-soft);
  color: var(--color-accent);
}

.floating-icon--messenger {
  background: #fff;
  border: none;
  color: #0084FF;
  box-shadow: 0 4px 16px rgba(0, 132, 255, 0.35);
}

.floating-icon--messenger:hover {
  color: #0084FF;
  box-shadow: 0 6px 20px rgba(0, 178, 255, 0.5);
}

.floating-icon--whatsapp {
  background: #fff;
  border: none;
  color: #25D366;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.35);
}

.floating-icon--whatsapp:hover {
  color: #25D366;
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
}

.floating-icon--chat {
  background: linear-gradient(135deg, #3B82F6, #22D3EE);
  border: none;
  color: #fff;
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.45);
}

.floating-icon--chat:hover {
  color: #fff;
  box-shadow: 0 0 18px rgba(34, 211, 238, 0.65);
}

/* .floating-icon 本身设置了 display:flex，普通优先级下会覆盖浏览器默认的
   `[hidden]{display:none}` 规则（author 规则优先级高于 UA 规则），因此需要
   显式声明这条覆盖规则，FB Messenger / WhatsApp 图标才能在未配置链接时真正隐藏。 */
.floating-icon[hidden] {
  display: none;
}

.floating-icon__badge {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  border-radius: 9px;
  background: var(--color-error);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--glow-error);
}

.floating-icon__badge[hidden] {
  display: none;
}

/* ---------- 11. 秒杀横幅 ---------- */
.deals-banner {
  position: relative;
  z-index: var(--z-deals-banner);
  background: linear-gradient(90deg, #DC2626, #F97316);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: #fff;
  font-weight: 600;
  animation: deals-pulse 2s ease-in-out infinite;
  cursor: pointer;
}

.deals-banner[hidden] {
  display: none !important;
  animation: none;
}

.deals-banner__label {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.02em;
}

@keyframes deals-pulse {
  0%, 100% {
    box-shadow: 0 0 0 rgba(249, 115, 22, 0.4);
  }
  50% {
    box-shadow: 0 0 24px rgba(249, 115, 22, 0.7);
  }
}

.deals-banner__countdown span {
  font-family: var(--font-numeric);
  display: inline-block;
  min-width: 1.5ch;
}

.deals-banner__countdown span.tick {
  animation: countdown-bounce 0.3s ease;
}

.deals-banner--fixed {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 399;
}

#app.deals-banner-offset {
  padding-top: calc(64px + var(--deals-banner-offset, 0px));
}

@keyframes countdown-bounce {
  0% { transform: scale(1); }
  40% { transform: scale(1.25); }
  100% { transform: scale(1); }
}

/* ---------- 12. Toast ---------- */
.toast-container {
  position: fixed;
  top: 80px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: var(--z-age-verification);
}

.toast {
  min-width: 260px;
  max-width: 360px;
  padding: 12px 16px;
  border-radius: var(--radius-input);
  color: #fff;
  font-size: 14px;
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: toast-in 0.25s ease, toast-out 0.25s ease 2.75s forwards;
}

.toast--success {
  background: rgba(74, 222, 128, 0.95);
}

.toast--error {
  background: rgba(248, 113, 113, 0.95);
}

@keyframes toast-in {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes toast-out {
  to { opacity: 0; transform: translateX(20px); }
}

/* ---------- 13. 骨架屏 ---------- */
.skeleton {
  background: linear-gradient(90deg, rgba(148,163,184,0.08) 25%, rgba(148,163,184,0.18) 37%, rgba(148,163,184,0.08) 63%);
  background-size: 400% 100%;
  animation: skeleton-loading 1.4s ease infinite;
  border-radius: var(--radius-input);
}

@keyframes skeleton-loading {
  0% { background-position: 100% 50%; }
  100% { background-position: 0 50%; }
}

/* ---------- 14. 空状态 ---------- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  color: var(--color-text-secondary);
  text-align: center;
  gap: 8px;
}

/* ---------- 15. 全局加载指示器 ---------- */
.global-loader {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-age-verification);
  transition: opacity 0.3s ease;
}

/* 页面关键结构初始化完成后，由公共初始化脚本（如 navbar.js）添加此类以淡出隐藏。 */
.global-loader--hidden {
  opacity: 0;
  pointer-events: none;
}

.global-loader__spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid rgba(59, 130, 246, 0.2);
  border-top-color: var(--color-primary);
  animation: btn-spin 0.8s linear infinite;
}

/* ---------- 16. 产品展示区（第九章「产品展示区」+ 第十章「产品系统」） ---------- */

/* ---- 16.1 整体布局 #product-area：桌面端 240px 左侧栏 + 右侧产品区 ---- */
.product-area {
  max-width: 1360px;
  margin: 0 auto;
  padding: 40px 24px 64px;
  display: grid;
  grid-template-columns: 240px 1fr;
  column-gap: 32px;
  align-items: start;
}

/* ---- 16.2 左侧分类导航 + 信任徽章：同一 sticky 侧栏，避免滚动时互相覆盖 ---- */
.product-sidebar {
  grid-column: 1;
  grid-row: 1;
  position: sticky;
  top: 88px;
  align-self: start;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: transparent;
}

.product-category-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  max-width: 100%;
}

.product-category-nav__toggle {
  display: none;
}

.product-category-nav__skeleton-item {
  height: 38px;
  border-radius: var(--radius-input);
}

.product-category-nav__item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  text-align: left;
  padding: 10px 14px;
  border: 1px solid transparent;
  border-radius: var(--radius-input);
  background: rgba(15, 23, 42, 0.35);
  color: #E2E8F0;
  font-size: 14px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.product-category-nav__dot {
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #94A3B8;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.product-category-nav__label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.product-category-nav__item:hover {
  color: #fff;
  background: rgba(15, 23, 42, 0.55);
}

.product-category-nav__item:hover .product-category-nav__dot {
  background: #93C5FD;
}

.product-category-nav__item.active {
  color: #fff;
  font-weight: 600;
  background: #2563EB;
  border-color: #2563EB;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.product-category-nav__item.active .product-category-nav__dot {
  background: #fff;
  box-shadow: none;
}

.product-category-nav__item.active:hover {
  color: #fff;
  background: #1D4ED8;
}

/* ---- 16.3 信任徽章 #trust-badges：桌面端竖排在分类导航下方，渐变分隔线分隔 ---- */
.trust-badges {
  position: relative;
  margin-top: 24px;
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.trust-badges__item {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 20px;
  background: rgba(15, 23, 42, 0.45);
  border: 1px solid rgba(148, 163, 184, 0.22);
  color: #E2E8F0;
  font-size: 13px;
  white-space: nowrap;
}

.trust-badges__icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.trust-badges__icon svg {
  width: 28px;
  height: 28px;
  display: block;
}

.trust-badges__label {
  flex-shrink: 0;
  white-space: nowrap;
  line-height: 1.2;
}

/* ---- 16.4 右侧主列：搜索 + 产品网格 + 分页（避免搜索独占 grid 行被侧栏撑高） ---- */
.product-main {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@keyframes product-grid-slide-in {
  from { transform: translateX(40px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.product-grid.slide-in {
  animation: product-grid-slide-in 0.4s ease;
}

@media (max-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .product-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* ---- 16.5 产品卡片 #product-grid .product-card ---- */
.product-card {
  height: 600px;
  max-height: 600px;
  background: #FFFFFF;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: var(--radius-card);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: translateY(0);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(15, 23, 42, 0.12);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.22);
}

.product-card.enter {
  animation: card-fade-in 0.4s ease both;
}

@keyframes card-fade-in {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.product-card__image-btn {
  display: block;
  width: 100%;
  flex: 0 0 60%;
  height: 60%;
  padding: 0;
  border: none;
  overflow: hidden;
  background: #F1F5F9;
  cursor: pointer;
}

.product-card__image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1);
  transition: transform 0.3s ease;
}

.product-card:hover .product-card__image {
  transform: scale(1.06);
}

.product-card__image[hidden] {
  display: none;
}

.product-card__body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1 1 40%;
  min-height: 0;
  overflow: hidden;
}

.product-card__name-btn {
  display: block;
  width: 100%;
  padding: 0;
  border: none;
  background: none;
  text-align: left;
  cursor: pointer;
  color: #0F172A;
  flex-shrink: 0;
}

.product-card__name {
  font-size: 16px;
  margin: 0;
  color: #0F172A;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: var(--transition-fast);
}

.product-card__name-btn:hover .product-card__name {
  color: #2563EB;
}

.product-card__price {
  font-size: 20px;
  font-weight: 700;
  color: #2563EB;
  margin: 0;
  flex-shrink: 0;
}

.product-price--deal {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

.product-price__original {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: line-through;
}

.product-price__sale {
  color: #F97316;
}

.product-price__badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: rgba(220, 38, 38, 0.18);
  color: #FCA5A5;
  font-size: 12px;
  font-weight: 700;
}

.product-card .product-price__original {
  color: #64748B;
}

.product-card .product-price__sale {
  color: #2563EB;
}

.product-card .product-price__badge {
  background: #FEE2E2;
  color: #DC2626;
}

.product-card__actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-shrink: 0;
}

.product-card__secondary-actions {
  display: flex;
  gap: 8px;
}

.product-card__secondary-actions .btn {
  flex: 1;
  font-size: 12px;
  padding: 0 8px;
  border-radius: 8px;
  font-weight: 600;
}

.product-card__add-btn {
  border-radius: 8px;
  font-weight: 600;
}

.product-card__add-btn.btn-primary {
  background: #2563EB;
  border: 1px solid #2563EB;
  color: #fff;
}

.product-card__add-btn.btn-primary:hover:not(:disabled) {
  background: #1D4ED8;
  border-color: #1D4ED8;
  filter: none;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

.product-card__secondary-actions .btn-secondary {
  background: #F1F5F9;
  color: #0F172A;
  border: 1px solid rgba(15, 23, 42, 0.12);
}

.product-card__secondary-actions .btn-secondary:hover:not(:disabled) {
  background: #E2E8F0;
  color: #0F172A;
}

.product-card__secondary-actions .btn-outline-muted {
  background: #fff;
  color: #334155;
  border: 1px solid rgba(15, 23, 42, 0.16);
}

.product-card__secondary-actions .btn-outline-muted:hover:not(:disabled) {
  background: #F8FAFC;
  color: #0F172A;
  border-color: rgba(15, 23, 42, 0.24);
}

/* ---- 16.6 变体（规格）按钮组：产品卡片与产品弹窗共用（见 utils/variantButtons.js） ---- */
.variant-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.product-card__variants {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  align-content: flex-start;
  scrollbar-width: none;
}

.product-card__variants::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

.variant-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: auto;
  min-height: 32px;
  min-width: 56px;
  padding: 5px 10px;
  line-height: 1.25;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border-strong);
  background: rgba(15, 23, 42, 0.4);
  color: var(--color-text-secondary);
  font-size: 12px;
  white-space: nowrap;
  transition: var(--transition-fast);
}

.variant-btn:hover {
  border-color: var(--color-text-secondary);
  color: var(--color-text-primary);
}

.variant-btn.active {
  border-color: var(--color-primary);
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-text-primary);
  box-shadow: var(--glow-primary-soft);
}

.variant-btn--more {
  min-width: auto;
  border-style: dashed;
  color: var(--color-accent);
}

.product-card .variant-btn {
  background: #F1F5F9;
  color: #0F172A;
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: none;
}

.product-card .variant-btn:hover {
  background: #E2E8F0;
  border-color: rgba(15, 23, 42, 0.16);
  color: #0F172A;
}

.product-card .variant-btn.active {
  background: #fff;
  color: #2563EB;
  border: 1px solid #2563EB;
  box-shadow: none;
  font-weight: 600;
}

.product-card .variant-btn--more {
  color: #64748B;
}

/* ---- 16.7 产品卡片骨架屏（复用 .skeleton 淡入淡出动画） ---- */
.product-card--skeleton .product-card__image-btn {
  flex: 0 0 60%;
  height: 60%;
  background: #F1F5F9;
}

.product-card--skeleton {
  background: #F8FAFC;
}

.product-card--skeleton .skeleton {
  background: linear-gradient(90deg, #E2E8F0 25%, #F8FAFC 37%, #E2E8F0 63%);
  background-size: 400% 100%;
}

.skeleton-line {
  height: 14px;
  border-radius: var(--radius-input);
  margin-bottom: 8px;
}

.skeleton-line--title { width: 70%; height: 18px; }
.skeleton-line--variants { width: 90%; height: 28px; }
.skeleton-line--price { width: 35%; height: 22px; margin-top: 4px; }

.skeleton-btn {
  height: 40px;
  border-radius: var(--radius-button);
  margin-top: 8px;
}

/* ---- 16.8 分页 #product-pagination ---- */
.product-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 32px;
}

.product-pagination[hidden] {
  display: none;
}

/* ---- 16.8b 产品搜索（桌面/移动均显示） / 查看更多（仅移动端） ---- */
.product-search {
  display: block;
  position: relative;
  z-index: 3;
  margin: 0 0 16px;
  flex: 0 0 auto;
}

.product-search__field {
  position: relative;
  display: flex;
  align-items: center;
}

.product-search__icon {
  position: absolute;
  left: 14px;
  color: var(--color-accent);
  pointer-events: none;
  filter: drop-shadow(0 0 6px rgba(34, 211, 238, 0.35));
}

.product-search__input {
  width: 100%;
  min-height: 44px;
  padding-left: 42px;
}

.product-search__dropdown {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% + 6px);
  z-index: 8;
  padding: 12px;
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  background: var(--color-dropdown-bg);
  backdrop-filter: var(--blur-glass-strong);
  -webkit-backdrop-filter: var(--blur-glass-strong);
  box-shadow: var(--shadow-card);
}

.product-search__dropdown[hidden] {
  display: none !important;
}

.product-search__dropdown-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.product-search__dropdown-title svg {
  flex-shrink: 0;
  color: #F97316;
  filter: drop-shadow(0 0 6px rgba(249, 115, 22, 0.45));
}

.product-search__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.product-search__chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--color-border-primary);
  background: rgba(59, 130, 246, 0.12);
  color: var(--color-accent);
  font-family: var(--font-numeric);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: var(--transition-fast);
}

.product-search__chip:hover,
.product-search__chip:focus-visible {
  background: rgba(34, 211, 238, 0.16);
  border-color: var(--color-accent);
  box-shadow: var(--glow-accent);
  outline: none;
}

.product-load-more {
  display: none;
}

.product-pagination__arrow,
.product-pagination__page {
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border-strong);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 14px;
  transition: var(--transition-fast);
}

.product-pagination__arrow:hover:not(:disabled),
.product-pagination__page:hover:not(.active) {
  border-color: var(--color-accent);
  color: var(--color-text-primary);
}

.product-pagination__arrow:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.product-pagination__page.active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}

/* ---- 16.9 产品弹窗内部布局（弹窗尺寸复用 .modal-product，见第 5 节） ---- */
.product-modal__layout {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 56px 32px 32px;
}

.product-modal__image-col {
  width: 46%;
  flex-shrink: 0;
}

.product-modal__image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-card);
  object-fit: cover;
}

.product-modal__details {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.product-modal__title {
  font-size: 22px;
  margin: 0;
}

.product-modal__price {
  font-size: 26px;
  font-weight: 700;
  margin: 4px 0;
}

.product-modal__effects-title {
  font-size: 13px;
  margin: 4px 0 0;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-modal__effects-list {
  margin: 0;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.product-modal__description {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin: 0;
}

.product-modal__actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}

.product-modal__secondary-actions {
  display: flex;
  gap: 10px;
}

.product-modal__secondary-actions .btn {
  flex: 1;
}

@media (max-width: 768px) {
  .product-modal__layout {
    flex-direction: column;
    padding: 48px 20px 20px;
  }

  .product-modal__image-col {
    width: 100%;
  }
}

/* ---- 16.10 响应式：平板端隐藏左侧栏，分类导航/信任徽章改为横向滚动 ---- */
@media (max-width: 1024px) {
  .product-area {
    grid-template-columns: 1fr;
  }

  .product-sidebar {
    display: contents;
  }

  .product-main {
    display: contents;
  }

  .product-category-picker {
    grid-column: 1;
    order: 1;
  }

  .product-category-nav {
    grid-column: 1;
    order: 1;
    position: static;
    flex-direction: row;
    overflow-x: auto;
    gap: 8px;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .product-category-nav__item {
    flex-shrink: 0;
    white-space: nowrap;
  }

  .product-search {
    grid-column: 1;
    grid-row: auto;
    order: 2;
  }

  .product-grid {
    grid-column: 1;
    grid-row: auto;
    order: 3;
  }

  .trust-badges {
    grid-column: 1;
    order: 4;
    flex-direction: row;
    overflow-x: auto;
    margin-top: 24px;
    padding: 20px 4px 4px;
    gap: 10px;
    -webkit-overflow-scrolling: touch;
  }

  .trust-badges::before {
    background: var(--color-border-strong);
  }

  .trust-badges__item {
    flex-shrink: 0;
    white-space: nowrap;
  }

  .product-pagination {
    grid-column: 1;
    grid-row: auto;
    order: 5;
  }
}

/* ---- 16.11 响应式：手机端分页栏 sticky 底部，触屏区域 >=44x44px ---- */
@media (max-width: 640px) {
  .product-search {
    display: block;
    grid-column: 1;
    order: 2;
    margin: 0 0 16px;
  }

  .product-search__chip {
    min-height: 36px;
  }

  .product-grid {
    order: 3;
  }

  .product-load-more:not([hidden]) {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    grid-column: 1;
    order: 4;
    margin: 24px 0 8px;
  }

  .product-load-more__btn {
    min-width: 180px;
    min-height: 44px;
  }

  .product-load-more__btn[hidden],
  .product-load-more__end[hidden] {
    display: none;
  }

  .product-load-more__end {
    margin: 0;
    font-size: 13px;
    color: var(--color-text-secondary);
  }

  .trust-badges {
    order: 5;
  }

  .product-pagination {
    display: none !important;
  }

  .product-card {
    transform: none;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
  }

  .product-card:hover {
    transform: none;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
  }

  .product-card:hover .product-card__image {
    transform: none;
  }

  .product-card.enter,
  .product-grid.slide-in {
    animation: none;
  }

  .product-card__image-btn {
    overflow: hidden;
  }

  .product-card__secondary-actions .btn,
  .product-card__add-btn {
    min-height: 44px;
  }

  .product-category-nav__item {
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .product-category-picker {
    position: relative;
    z-index: 6;
    width: 100%;
  }

  .product-category-nav__toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
    min-height: 44px;
    padding: 10px 14px;
    border: 1px solid rgba(148, 163, 184, 0.28);
    border-radius: var(--radius-input);
    background: rgba(15, 23, 42, 0.72);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
  }

  .product-category-nav__toggle-label {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .product-category-nav__toggle-chevron {
    flex-shrink: 0;
    width: 8px;
    height: 8px;
    border-right: 2px solid #E2E8F0;
    border-bottom: 2px solid #E2E8F0;
    transform: rotate(45deg) translateY(-2px);
    transition: transform 0.2s ease;
  }

  .product-category-picker.is-open .product-category-nav__toggle-chevron {
    transform: rotate(225deg) translateY(-1px);
  }

  .product-category-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 6px);
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    max-height: min(60vh, 360px);
    gap: 4px;
    padding: 8px;
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: var(--radius-card);
    background: rgba(15, 23, 42, 0.96);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
    -webkit-overflow-scrolling: touch;
  }

  .product-category-picker.is-open .product-category-nav {
    display: flex;
  }

  .product-category-nav__item {
    width: 100%;
    flex-shrink: 1;
    max-width: 100%;
  }
}

/* 产品卡片入场动画 / 分页滑动动画在 prefers-reduced-motion 下的禁用已由全局规则覆盖
   （见本文件后方 "@media (prefers-reduced-motion: reduce)" 对 animation-duration 的统一处理）；
   productInit.js 中的 playSlideTransition() 也会在 JS 层面额外判断该媒体查询，双重保险跳过动画类的添加。 */

/* ---------- 17. 飞入购物车 / 下单成功动画 ---------- */
.fly-to-cart {
  position: fixed;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: var(--glow-accent);
  z-index: var(--z-age-verification);
  pointer-events: none;
  offset-rotate: 0deg;
  animation: fly-to-cart-motion 0.8s cubic-bezier(0.3, 0, 0.7, 1) forwards;
}

@keyframes fly-to-cart-motion {
  from { transform: scale(1); opacity: 1; }
  to { transform: scale(0.3); opacity: 0; }
}

/* 加购曲线飞入动画（第十一章「加购按键」：从按钮飞向右侧购物车图标，1.2秒，曲线路径，
   霓虹青轨迹光点）。用 CSS Motion Path（offset-path）实现抛物线轨迹，起点/控制点/终点
   坐标由 public/js/cart.js 的 animateFlyToCart() 按点击位置动态计算后写入内联样式；
   不支持 offset-path 的浏览器会优雅降级为原地缩放淡出，不影响加购本身的功能。 */
.fly-to-cart-dot {
  position: fixed;
  width: 14px;
  height: 14px;
  margin-left: -7px;
  margin-top: -7px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: var(--glow-accent), 0 0 18px 4px rgba(34, 211, 238, 0.45);
  z-index: var(--z-age-verification);
  pointer-events: none;
  offset-rotate: 0deg;
  animation: fly-to-cart-path 1.2s cubic-bezier(0.3, 0, 0.7, 1) forwards;
}

@keyframes fly-to-cart-path {
  0% { offset-distance: 0%; opacity: 1; transform: scale(1); }
  85% { opacity: 1; }
  100% { offset-distance: 100%; opacity: 0; transform: scale(0.3); }
}

/* 下单成功动画（第十二章「结账流程」流程图：订单写入 Firestore -> 触发下单成功动画
   -> 购物车清空...），createOrder 真正调用成功后展示订单号+总额的快照卡片，
   居中弹出后缩小淡出。见 orderSummaryModal.js 的 showOrderSuccessAnimation()。 */
.order-success-fly {
  position: fixed;
  left: 50%;
  top: 50%;
  z-index: var(--z-age-verification);
  pointer-events: none;
  animation: order-fly-motion 0.9s cubic-bezier(0.3, 0, 0.7, 1) forwards;
}

.order-success-fly__card {
  padding: 20px 32px;
  border-radius: var(--radius-card);
  text-align: center;
  white-space: nowrap;
}

.order-success-fly__label {
  margin: 0 0 4px;
  font-size: 12px;
  color: var(--color-text-secondary);
}

.order-success-fly__number {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  font-family: var(--font-numeric);
}

.order-success-fly__total {
  margin: 6px 0 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  text-shadow: 0 0 10px rgba(34, 211, 238, 0.4);
}

@keyframes order-fly-motion {
  from { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  to { transform: translate(-50%, -50%) scale(0.4); opacity: 0.2; }
}

.target-flash {
  animation: target-flash-anim 0.6s ease;
}

@keyframes target-flash-anim {
  0%, 100% { box-shadow: none; }
  50% { box-shadow: 0 0 20px 6px rgba(34, 211, 238, 0.7); }
}

/* ---------- 18. 背景动画（生物细胞 / 分子球 / 渐变光晕） ---------- */
.bg-animated {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.cells-background {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
}

.bg-animated__molecule {
  position: absolute;
  opacity: 0.08;
  animation: molecule-float 18s ease-in-out infinite;
}

@keyframes molecule-float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(20px, -30px) rotate(180deg); }
}

.bg-animated__grid {
  display: none;
}

.bg-animated__particle {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.1;
  animation: particle-drift 12s linear infinite;
}

@keyframes particle-drift {
  from { transform: translateY(0); }
  to { transform: translateY(-120vh); }
}

.bg-particle {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  will-change: transform, opacity;
}

@keyframes floatParticle {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(12px, -16px); }
  50% { transform: translate(-14px, 8px); }
  75% { transform: translate(8px, 14px); }
}

.bg-animated__glow {
  position: absolute;
  width: 60vw;
  height: 60vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15), transparent 70%);
  filter: blur(60px);
}

/* 移动端禁用所有背景动画，改为静态渐变 */
@media (max-width: 767px) {
  .cells-background {
    display: none;
  }
}

@media (max-width: 768px) {
  .bg-animated__molecule,
  .bg-animated__particle,
  .bg-particle {
    display: none;
  }

  .bg-animated {
    background: linear-gradient(160deg, #1E293B 0%, #172033 100%);
  }
}

/* 尊重用户的“减少动态效果”系统偏好 */
@media (prefers-reduced-motion: reduce) {
  .cells-background {
    display: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- 19. 年龄验证页面专属样式 ---------- */
.age-gate {
  position: fixed;
  inset: 0;
  z-index: var(--z-age-verification);
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 20%, #223148 0%, #1E293B 60%, #131c2b 100%);
  padding: 24px;
}

.age-gate__card {
  width: 480px;
  max-width: 100%;
  border-radius: 16px;
  padding: 40px 32px;
  text-align: center;
  background: var(--color-dropdown-bg);
  backdrop-filter: var(--blur-glass-strong);
  -webkit-backdrop-filter: var(--blur-glass-strong);
  border: 1px solid var(--color-border);
}

.age-gate__logo {
  font-family: var(--font-title);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 24px;
  background: linear-gradient(90deg, #fff, var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 10px rgba(34, 211, 238, 0.5));
}

.age-gate__title {
  font-size: 22px;
  margin-bottom: 12px;
}

.age-gate__desc {
  font-size: 14px;
  margin-bottom: 28px;
}

.age-gate__actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.age-gate__actions .btn {
  width: 100%;
  height: 46px;
}

.age-gate__deny-message {
  margin-top: 20px;
  padding: 16px;
  border-radius: var(--radius-input);
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: var(--color-error);
  font-size: 14px;
  display: none;
}

.age-gate__deny-message.visible {
  display: block;
}

@media (max-width: 640px) {
  .age-gate__card {
    width: 90%;
    padding: 32px 20px;
  }
}

/* ---------- 20. 触屏可点击区域最小尺寸 ---------- */
@media (max-width: 768px) {
  .btn,
  .navbar__link,
  .floating-icon,
  .dropdown-menu__item {
    min-height: 44px;
  }

  .floating-icon {
    min-width: 44px;
  }
}

/* ---------- 21. 无障碍：视觉隐藏但屏幕阅读器可读 ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 22. 导航栏右侧区域 / 认证按钮响应式 / 汉堡菜单 / 移动端菜单面板 ---------- */
.navbar__right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.navbar__auth {
  position: relative;
  display: flex;
  align-items: center;
}

/* 桌面端默认只显示完整文案，隐藏移动端精简文案 */
.btn-auth__short {
  display: none;
}

/* 汉堡菜单按钮：40x40px 点击区域，霓虹青三条横线图标，仅移动端显示 */
.hamburger-btn {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: transparent;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.hamburger-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-accent);
  box-shadow: var(--glow-accent);
  border-radius: 1px;
  transition: var(--transition-fast);
}

.hamburger-btn[aria-expanded='true'] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger-btn[aria-expanded='true'] span:nth-child(2) {
  opacity: 0;
}

.hamburger-btn[aria-expanded='true'] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 移动端导航：全屏半透明遮罩 + 右侧 280px 面板（点击遮罩关闭） */
.mobile-menu {
  position: fixed;
  inset: 0;
  width: auto;
  max-width: none;
  background: rgba(2, 6, 23, 0.55);
  z-index: var(--z-user-menu);
  padding: 0;
  border: none;
  transform: none;
  animation: modal-fade-in 0.2s ease forwards;
}

.mobile-menu__panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 280px;
  max-width: 100%;
  background: var(--color-dropdown-bg);
  backdrop-filter: var(--blur-glass-strong);
  -webkit-backdrop-filter: var(--blur-glass-strong);
  border-left: 1px solid var(--color-border);
  padding: 88px 24px 24px;
  overflow-y: auto;
  animation: mobile-menu-slide-in 0.25s ease;
}

body.mobile-menu-open .navbar {
  z-index: calc(var(--z-user-menu) + 2);
}

@keyframes mobile-menu-slide-in {
  from {
    transform: translateX(100%);
    opacity: 0.4;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.mobile-menu nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-menu__link {
  display: block;
  padding: 12px 8px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 15px;
  border-radius: 6px;
  min-height: 44px;
}

.mobile-menu__link:hover,
.mobile-menu__link.active {
  color: #fff;
  background: rgba(59, 130, 246, 0.12);
}

@media (max-width: 768px) {
  .navbar__links {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  .btn-auth {
    width: auto;
    padding: 0 16px;
  }

  .btn-auth__full {
    display: none;
  }

  .btn-auth__short {
    display: inline;
  }

  /* 已登录时移动端只显示头像圆形，隐藏用户名与箭头 */
  .user-pill {
    background: transparent;
    border: none;
    padding: 0;
    min-width: 44px;
    min-height: 44px;
    justify-content: center;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .user-pill__name,
  .user-pill__caret {
    display: none;
  }

  .dropdown-menu__item {
    height: 44px;
    min-height: 44px;
  }
}

/* ---------- 23. 认证弹窗（登录/注册，第七章「认证弹窗布局」） ---------- */
.auth-modal__tabs {
  display: flex;
  padding: 24px 28px 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
}

.auth-modal__tabs[hidden] {
  display: none;
}

.auth-modal__tab {
  flex: 1;
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 0 0 12px;
  cursor: pointer;
  position: relative;
}

.auth-modal__tab.active {
  color: #fff;
}

.auth-modal__tab.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--color-accent);
  box-shadow: var(--glow-accent);
}

.auth-modal__form {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 4px 28px 28px;
}

.auth-modal__form[hidden] {
  display: none;
}

#auth-forgot-form {
  padding-top: 20px;
}

.auth-modal__label {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 8px;
}

.auth-modal__form .btn {
  width: 100%;
  margin-top: 8px;
}

.auth-modal__google {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.auth-modal__google-icon {
  flex-shrink: 0;
}

.auth-modal__captcha {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
}

.auth-modal__captcha-visual {
  display: flex;
  align-items: center;
  gap: 8px;
}

.auth-modal__captcha-image {
  flex: 1;
  min-width: 0;
  height: 48px;
  padding: 0;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.8);
  overflow: hidden;
  cursor: pointer;
}

.auth-modal__captcha-image canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.auth-modal__captcha-refresh {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  margin-top: 0;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--color-border-strong);
  background: rgba(15, 23, 42, 0.55);
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.auth-modal__captcha-refresh:hover {
  border-color: var(--color-accent);
  color: #fff;
}

.auth-modal__form .auth-modal__captcha-refresh {
  width: 44px;
  margin-top: 0;
}

.auth-modal__captcha .input {
  width: 100%;
  min-height: 44px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  text-align: center;
}

.auth-modal__divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 14px 0 4px;
  color: var(--color-text-secondary);
  font-size: 12px;
}

.auth-modal__divider::before,
.auth-modal__divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.auth-modal__link {
  display: block;
  text-align: center;
  font-size: 13px;
  color: var(--color-accent);
  margin-top: 12px;
}

.auth-modal__link:hover {
  text-decoration: underline;
}

/* ---------- 24. 首页非产品板块（轮播/三板块/品牌故事/Why Us/FAQ/Footer） ---------- */

/* 固定导航栏高度补偿：#navbar 为 position:fixed，需给主内容区留出等高的顶部间距，
   否则轮播窗口等首屏内容会被导航栏遮挡。 */
#app {
  padding-top: 64px;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- 24.1 轮播窗口 #carousel（第九章：全宽，400px/200px，5张图，自动+手动） ---- */
.carousel {
  position: relative;
  width: 100%;
  padding: 24px 0 40px;
}

.carousel__viewport {
  position: relative;
  width: 100%;
  height: 400px;
  overflow: hidden;
}

.carousel__track {
  display: flex;
  height: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
  transition: transform 0.5s ease;
}

.carousel__slide {
  position: relative;
  flex: 0 0 100%;
  height: 100%;
  display: flex;
  align-items: flex-end;
}

.carousel__image-placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #24344d 0%, #172033 100%);
}

.carousel__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  z-index: 0;
}

.carousel__image-placeholder--1 { background: linear-gradient(135deg, #1f3a5f, #172033); }
.carousel__image-placeholder--2 { background: linear-gradient(135deg, #223148, #14202f); }
.carousel__image-placeholder--3 { background: linear-gradient(135deg, #1e3a5f, #1a2942); }
.carousel__image-placeholder--4 { background: linear-gradient(135deg, #2a3f52, #182636); }
.carousel__image-placeholder--5 { background: linear-gradient(135deg, #243b52, #131f30); }

.carousel__caption {
  position: relative;
  z-index: 1;
  padding: 40px 60px;
  max-width: 620px;
  width: 100%;
  background: linear-gradient(0deg, rgba(15, 23, 42, 0.85) 10%, rgba(15, 23, 42, 0) 100%);
}

.carousel__title {
  font-size: 32px;
  margin-bottom: 8px;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.5);
}

.carousel__subtitle {
  font-size: 15px;
  color: var(--color-text-primary);
  opacity: 0.85;
  margin: 0;
}

.carousel__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border-strong);
  background: rgba(15, 23, 42, 0.5);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  z-index: 2;
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  transition: var(--transition-fast);
}

.carousel__arrow:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: var(--glow-primary-soft);
}

.carousel__arrow--prev { left: 20px; }
.carousel__arrow--next { right: 20px; }

.carousel__dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
}

.carousel__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border-strong);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: var(--transition-fast);
}

.carousel__dot:hover {
  background: var(--color-text-secondary);
}

.carousel__dot.active {
  background: var(--color-accent);
  box-shadow: var(--glow-accent);
  width: 22px;
  border-radius: 4px;
}

@media (max-width: 768px) {
  .carousel { padding: 16px 0 28px; }
  .carousel__viewport { height: 200px; }
  .carousel__caption { padding: 18px 24px; max-width: 100%; }
  .carousel__title { font-size: 20px; margin-bottom: 4px; }
  .carousel__subtitle { font-size: 12px; }
  /* 移动端简化：隐藏箭头按钮，改为滑动手势 + 圆点导航 */
  .carousel__arrow { display: none; }
}

/* ---- 24.2 实验室/工厂/COA 三板块 #trust-sections（第八章 + 第九章） ---- */
.trust-sections {
  padding: 64px 0;
}

.trust-sections__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.trust-card {
  background: var(--color-card-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  transition: var(--transition-fast);
  scroll-margin-top: 80px;
}

.trust-card:hover,
.trust-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--color-border-primary);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4), var(--glow-primary-soft);
}

.trust-card__image-placeholder {
  height: 200px;
  flex-shrink: 0;
  overflow: hidden;
  position: relative;
}

.trust-card__image-placeholder--lab { background: linear-gradient(135deg, #1e3a5f, #172033); }
.trust-card__image-placeholder--factory { background: linear-gradient(135deg, #2a3f52, #182636); }
.trust-card__image-placeholder--coa { background: linear-gradient(135deg, #223148, #14202f); }

.trust-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.trust-card__image[hidden] {
  display: none;
}

.trust-card__body {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.trust-card__title {
  font-size: 18px;
  margin-bottom: 0;
}

.trust-card__desc {
  font-size: 14px;
  margin-bottom: 0;
  flex: 1;
}

.trust-card__cta {
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 600;
}

@media (max-width: 1024px) {
  .trust-sections__grid {
    grid-template-columns: 1fr;
  }
}

/* ---- 板块弹窗（实验室/工厂/COA 通用，复用 .modal-section 900x600） ---- */
.section-modal__layout {
  display: flex;
  height: 100%;
}

.section-modal__thumbs {
  width: 200px;
  flex-shrink: 0;
  border-right: 1px solid var(--color-border);
  padding: 56px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
}

.section-modal__thumb {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: var(--radius-input);
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: var(--transition-fast);
  width: 100%;
}

.section-modal__thumb-image {
  width: 44px;
  height: 44px;
  border-radius: 6px;
  flex-shrink: 0;
  overflow: hidden;
  background: linear-gradient(135deg, #24344d, #172033);
}

.section-modal__thumb-image img,
.section-modal__image-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: inherit;
}

.section-modal__thumb-label {
  font-size: 13px;
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
}

.section-modal__thumb:hover {
  background: rgba(148, 163, 184, 0.08);
}

.section-modal__thumb.active {
  border-color: var(--color-primary);
  background: rgba(59, 130, 246, 0.1);
}

.section-modal__thumb.active .section-modal__thumb-label {
  color: var(--color-text-primary);
  font-weight: 600;
}

.section-modal__display {
  flex: 1;
  padding: 56px 32px 32px;
  overflow-y: auto;
  min-width: 0;
}

.section-modal__title {
  font-size: 22px;
  margin-bottom: 16px;
}

.section-modal__image-placeholder {
  width: 100%;
  height: 260px;
  border-radius: var(--radius-card);
  background: linear-gradient(135deg, #24344d, #16233a);
  margin-bottom: 16px;
  overflow: hidden;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.section-modal__image-placeholder.visible {
  opacity: 1;
}

.section-modal__desc {
  font-size: 14px;
  line-height: 1.7;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.section-modal__desc.visible {
  opacity: 1;
}

@media (max-width: 768px) {
  .section-modal__layout {
    flex-direction: column-reverse;
  }

  .section-modal__thumbs {
    width: 100%;
    flex-direction: row;
    overflow-x: auto;
    overflow-y: visible;
    border-right: none;
    border-top: 1px solid var(--color-border);
    padding: 12px;
  }

  .section-modal__thumb {
    flex-direction: column;
    min-width: 84px;
    text-align: center;
    gap: 6px;
  }

  .section-modal__display {
    padding: 48px 20px 20px;
  }

  .section-modal__image-placeholder {
    height: 180px;
  }
}

/* ---- 24.3 品牌故事区块 #brand-story（第九章：全宽，左图右文） ---- */
.brand-story {
  padding: 64px 0;
}

.brand-story__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.brand-story__image-placeholder {
  height: 360px;
  border-radius: var(--radius-card);
  background: linear-gradient(135deg, #24344d, #172033);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.brand-story__image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-story__image[hidden] {
  display: none;
}

.brand-story__title {
  font-size: 28px;
  margin-bottom: 20px;
}

.brand-story__content p {
  font-size: 15px;
  line-height: 1.8;
}

@media (max-width: 900px) {
  .brand-story__inner {
    grid-template-columns: 1fr;
  }

  .brand-story__image-placeholder {
    height: 240px;
    order: -1;
  }
}

/* ---- 24.4 Why Labs Trust Us #why-trust-us（第九章：数据统计 + 优势点） ---- */
.why-trust-us {
  padding: 64px 0;
  background: rgba(15, 23, 42, 0.5);
}

.why-trust-us__title {
  text-align: center;
  font-size: 30px;
  margin-bottom: 40px;
}

.why-trust-us__stats {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.stat-item {
  flex: 1;
  min-width: 160px;
  max-width: 220px;
  text-align: center;
  padding: 20px 16px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.stat-item__value {
  display: block;
  font-family: var(--font-numeric);
  font-size: 32px;
  font-weight: 700;
  background: linear-gradient(135deg, #fff, var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-item__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.why-trust-us__advantages {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-item {
  display: flex;
  gap: 14px;
  padding: 20px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.advantage-item__icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(34, 211, 238, 0.12);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.advantage-item__title {
  font-size: 15px;
  margin-bottom: 4px;
}

.advantage-item__desc {
  font-size: 13px;
  margin-bottom: 0;
  line-height: 1.6;
}

@media (max-width: 1024px) {
  .why-trust-us__stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }

  .stat-item {
    max-width: none;
  }

  .why-trust-us__advantages {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .why-trust-us__advantages {
    grid-template-columns: 1fr;
  }
}

/* ---- 24.5 FAQ 手风琴 #faq（第九章：6-8个问答） ---- */
.faq {
  padding: 64px 0;
}

.faq__title {
  text-align: center;
  font-size: 30px;
  margin-bottom: 32px;
}

.faq__list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.faq-item__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  font-size: 15px;
  font-weight: 600;
  text-align: left;
}

.faq-item__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.12);
  color: var(--color-accent);
  font-size: 16px;
  line-height: 1;
  transition: transform 0.25s ease;
}

.faq-item.open .faq-item__icon {
  transform: rotate(45deg);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 20px;
}

.faq-item.open .faq-item__answer {
  padding: 0 20px 18px;
}

.faq-item__answer p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
}

/* ---- 24.6 Footer #footer（第二十章：品牌简介 + 法律链接 + 支付图标 + 安全标识） ---- */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.6);
  padding: 56px 0 0;
}

.site-footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 40px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
}

.site-footer__logo {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 700;
  background: linear-gradient(135deg, #fff, var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-stroke: 0.45px rgba(255, 255, 255, 0.45);
  paint-order: stroke fill;
  margin-bottom: 12px;
}

.site-footer__tagline {
  font-size: 13px;
  line-height: 1.7;
  max-width: 360px;
  margin-bottom: 0;
}

.site-footer__heading {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: 14px;
}

.site-footer__legal ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__legal a {
  color: var(--color-text-secondary);
  font-size: 13px;
  transition: var(--transition-fast);
}

.site-footer__legal a:hover {
  color: var(--color-accent);
}

.site-footer__payments {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.payment-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 28px;
  padding: 0 10px;
  border-radius: 6px;
  background: rgba(226, 232, 240, 0.08);
  border: 1px solid var(--color-border);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-text-secondary);
}

.site-footer__secure-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-success);
}

.site-footer__secure-badge svg {
  flex-shrink: 0;
}

.site-footer__bottom {
  border-top: 1px solid var(--color-border);
  padding: 20px 24px;
  text-align: center;
}

.site-footer__bottom p {
  margin: 0;
  font-size: 12px;
  color: var(--color-text-secondary);
}

@media (max-width: 768px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* ---------- 25. 购物车弹窗内容（第十一章「购物车系统」，弹窗尺寸/滑出动画见第7节 .modal-cart） ---------- */
.cart-modal__layout {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 56px 0 0;
}

.cart-modal__title {
  font-size: 20px;
  margin: 0 24px 16px;
}

.cart-modal__body {
  flex: 1;
  min-height: 0; /* 允许 flex 子项在列布局中正确收缩，触发自身 overflow-y 而不是撑高父容器 */
  overflow-y: auto;
  padding: 0 24px;
}

.cart-modal__footer {
  padding: 16px 24px 24px;
  border-top: 1px solid var(--color-border);
}

.cart-item-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cart-item {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  grid-template-areas:
    "image info subtotal"
    "image qty subtotal"
    "image remove subtotal";
  column-gap: 12px;
  row-gap: 4px;
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.cart-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.cart-item__image {
  grid-area: image;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-input);
  object-fit: cover;
  align-self: start;
}

.cart-item__info {
  grid-area: info;
  min-width: 0;
}

.cart-item__name {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cart-item__variant {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--color-text-secondary);
}

.cart-item__price {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.cart-item__qty {
  grid-area: qty;
  display: flex;
  align-items: center;
  gap: 6px;
}

.cart-item__qty-btn {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border-strong);
  background: transparent;
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
}

.cart-item__qty-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-text-primary);
}

.cart-item__qty-input {
  width: 40px;
  height: 26px;
  padding: 0 4px;
  text-align: center;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border-strong);
  background: rgba(15, 23, 42, 0.4);
  color: var(--color-text-primary);
  font-size: 13px;
}

.cart-item__remove {
  grid-area: remove;
  justify-self: start;
  min-height: 32px;
  padding: 4px 10px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-button);
  background: rgba(248, 113, 113, 0.08);
  color: var(--color-error);
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  line-height: 1;
}

.cart-item__remove:hover {
  color: #fff;
  background: rgba(248, 113, 113, 0.22);
  border-color: var(--color-error);
}

.cart-item__subtotal {
  grid-area: subtotal;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

/* ---- 25.1 运费进度条（渐变电光蓝到霓虹青，带柔和发光） ---- */
.cart-shipping-progress {
  margin: 0 0 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.cart-shipping-progress__message {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.cart-shipping-progress__bar {
  height: 8px;
  border-radius: 4px;
  background: rgba(148, 163, 184, 0.15);
  overflow: hidden;
}

.cart-shipping-progress__fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  box-shadow: var(--glow-accent);
  transition: width 0.4s ease;
}

.cart-shipping-progress__amount {
  margin: 8px 0 0;
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* ---- 25.2 底部金额与结算按钮 ---- */
.cart-footer__subtotal,
.cart-footer__shipping {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}

.cart-footer__discount {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  margin: 0 0 8px;
}

.cart-footer__total {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 16px;
  font-weight: 700;
  margin: 4px 0 12px;
}

.cart-footer__checkout-btn {
  width: 100%;
}

.cart-footer__hint {
  margin: 8px 0 0;
  font-size: 11px;
  color: var(--color-text-secondary);
  text-align: center;
}

@media (max-width: 640px) {
  .cart-item {
    grid-template-columns: 56px 1fr auto;
  }

  .cart-item__image {
    width: 56px;
    height: 56px;
  }

  .cart-item__qty-btn {
    min-width: 32px;
    min-height: 32px;
  }

  .cart-item__remove {
    min-height: 44px;
    min-width: 88px;
    padding: 0 14px;
    font-size: 14px;
  }
}

/* ---------- 26. 法律页面内容排版（第二十章「底部信息」+ 附录「SEO 与法律合规」） ---------- */
.legal-page__logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.legal-page {
  padding: 96px 24px 80px;
}

.legal-page__inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px;
  background: var(--color-card-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.legal-page__title {
  font-family: var(--font-title);
  font-size: 32px;
  margin: 0 0 8px;
}

.legal-page__updated {
  color: var(--color-text-secondary);
  font-size: 13px;
  margin: 0 0 32px;
}

.legal-page__section {
  margin-bottom: 28px;
}

.legal-page__section:last-child {
  margin-bottom: 0;
}

.legal-page__section h2 {
  font-size: 18px;
  margin: 0 0 12px;
  color: var(--color-text-primary);
}

.legal-page__section p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0 0 12px;
}

.legal-page__section p:last-child {
  margin-bottom: 0;
}

.legal-page__section ul {
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding-left: 20px;
  margin: 0 0 12px;
}

.legal-page__section li {
  margin-bottom: 6px;
}

@media (max-width: 768px) {
  .legal-page {
    padding: 88px 16px 60px;
  }

  .legal-page__inner {
    padding: 24px;
  }

  .legal-page__title {
    font-size: 24px;
  }
}

/* ---------- 27. Cookie 同意横幅（附录「SEO 与法律合规」：CCPA 合规要求） ---------- */
.cookie-banner {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-age-verification);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 24px;
  background: var(--color-navbar-bg-scrolled);
  backdrop-filter: var(--blur-glass-strong);
  -webkit-backdrop-filter: var(--blur-glass-strong);
  border-top: 1px solid var(--color-border);
  animation: cookie-banner-slide-up 0.3s ease forwards;
}

.cookie-banner.cookie-banner--closing {
  animation: cookie-banner-slide-down 0.3s ease forwards;
}

@keyframes cookie-banner-slide-up {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

@keyframes cookie-banner-slide-down {
  from { transform: translateY(0); }
  to { transform: translateY(100%); }
}

.cookie-banner__text {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.cookie-banner__text a {
  color: var(--color-accent);
}

.cookie-banner__dns-link {
  margin-left: 8px;
  white-space: nowrap;
}

.cookie-banner__actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .cookie-banner {
    flex-direction: column;
    align-items: stretch;
  }

  .cookie-banner__actions .btn {
    flex: 1;
  }
}

/* ---------- 28. 结账流程弹窗（第十二章）：地址 / 退款邮箱 / 订单摘要 / 支付方式 ---------- */
/* 四个弹窗共用的头部/表单/底部操作栏结构（弹窗尺寸见第7节 .modal-address 等） */
.checkout-modal__header {
  padding: 24px 28px 0;
}

.checkout-modal__title {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  margin: 0;
}

.checkout-modal__note {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 8px 0 0;
}

.checkout-modal__body {
  padding: 16px 28px 4px;
  max-height: 60vh;
  overflow-y: auto;
}

.checkout-modal__form {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.checkout-modal__form .auth-modal__label {
  margin-top: 8px;
}

.checkout-modal__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.checkout-modal__row[hidden] {
  display: none;
}

.checkout-modal__row--three {
  grid-template-columns: 1fr 1fr 1fr;
}

.checkout-modal__actions {
  display: flex;
  gap: 12px;
  padding: 20px 28px 28px;
}

.checkout-modal__actions .btn {
  flex: 1;
  margin-top: 0;
}

.checkout-modal__link-btn {
  background: none;
  border: none;
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 0;
  text-align: left;
}

.checkout-modal__link-btn:hover {
  text-decoration: underline;
}

/* 地址列表（已存地址，第十二章「地址填写/选择模块」） */
.address-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.address-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.5);
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: left;
  width: 100%;
}

.address-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
}

.address-card.selected {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary), 0 0 16px rgba(59, 130, 246, 0.25);
  background: rgba(59, 130, 246, 0.08);
}

.address-card__radio {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--color-border-strong);
  flex-shrink: 0;
  margin-top: 2px;
  position: relative;
}

.address-card.selected .address-card__radio {
  border-color: var(--color-primary);
}

.address-card.selected .address-card__radio::after {
  content: '';
  position: absolute;
  inset: 2px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: var(--glow-primary);
}

.address-card__body {
  flex: 1;
  min-width: 0;
}

.address-card__name-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.address-card__name {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
}

.address-card__badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: 4px;
  padding: 2px 6px;
}

.address-card__line {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin: 0;
}

.address-warning {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-input);
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.3);
  color: #FBBF24;
  font-size: 13px;
  line-height: 1.5;
}

.address-warning[hidden] {
  display: none;
}

/* 订单摘要弹窗（第十二章「订单摘要确认弹窗」） */
.order-summary__items {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}

.order-summary__item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.order-summary__item-image {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-input);
  object-fit: cover;
  background: rgba(148, 163, 184, 0.1);
  flex-shrink: 0;
}

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

.order-summary__item-name {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.order-summary__item-meta {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin: 0;
}

.order-summary__item-subtotal {
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}

.order-summary__totals {
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.order-summary__total-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.order-summary__total-row--grand {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  padding-top: 8px;
  border-top: 1px dashed var(--color-border);
}

.order-summary__total-row--grand .text-numeric {
  color: var(--color-accent);
  text-shadow: 0 0 10px rgba(34, 211, 238, 0.4);
}

/* 支付方式弹窗（第十二章「支付方式选择弹窗」） */
.payment-modal__header {
  text-align: center;
}

.payment-modal__order-id {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin: 4px 0 0;
}

.payment-modal__amount {
  font-family: var(--font-title);
  font-size: 32px;
  font-weight: 700;
  margin: 8px 0 0;
  background: linear-gradient(90deg, #fff, var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.payment-modal__countdown {
  text-align: center;
  margin: 16px 0;
}

.payment-modal__countdown-value {
  font-family: var(--font-title);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.payment-modal__countdown-value.payment-modal__countdown-value--warning {
  color: var(--color-error);
  animation: countdown-bounce 0.6s ease infinite alternate;
}

.payment-modal__countdown-label {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

.payment-modal__methods {
  display: flex;
  gap: 12px;
  margin: 16px 0;
}

.payment-modal__method-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px 12px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.5);
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: center;
  color: var(--color-text-primary);
}

.payment-modal__method-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 16px rgba(59, 130, 246, 0.25);
}

.payment-modal__method-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.payment-modal__method-label {
  font-size: 13px;
  font-weight: 600;
}

.payment-modal__qr-placeholder {
  width: 88px;
  height: 88px;
  border-radius: var(--radius-input);
  border: 1px dashed var(--color-border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  background: rgba(148, 163, 184, 0.05);
}

.payment-modal__qr-image {
  width: 88px;
  height: 88px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border-strong);
  background: #FFFFFF;
  padding: 4px;
  object-fit: contain;
}

.payment-modal__status {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: var(--radius-input);
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.3);
  color: #34D399;
  font-size: 13px;
  text-align: center;
}

.payment-modal__status--overdue {
  background: rgba(248, 113, 113, 0.1);
  border-color: rgba(248, 113, 113, 0.3);
  color: var(--color-error);
}

@media (max-width: 480px) {
  .checkout-modal__row,
  .checkout-modal__row--three {
    grid-template-columns: 1fr;
  }

  .payment-modal__methods {
    flex-direction: column;
  }
}

/* ---------- 29. 用户个人中心（第十四章）：账户信息 / 订单 / 地址簿 / PayPal 退款邮箱 ---------- */
.account-modal__layout {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0; /* 允许子元素 flex:1 后正确触发内部滚动，而不是撑高整个弹窗 */
}

.account-modal__tabs {
  display: flex;
  flex-shrink: 0;
  border-bottom: 1px solid var(--color-border);
  padding: 8px 48px 0 12px;
}

.account-modal__tab {
  flex: 1;
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  padding: 16px 6px 14px;
  cursor: pointer;
  position: relative;
  text-align: center;
  transition: var(--transition-fast);
}

.account-modal__tab:hover {
  color: #fff;
}

.account-modal__tab.active {
  color: var(--color-accent);
}

.account-modal__tab.active::after {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: -1px;
  height: 2px;
  background: var(--color-accent);
  box-shadow: var(--glow-accent);
  border-radius: 2px;
}

.account-modal__content {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 24px 28px 28px;
}

.account-modal__footer {
  flex-shrink: 0;
  padding: 12px 28px 20px;
  border-top: 1px solid var(--color-border);
}

.account-modal__close-action {
  width: 100%;
  min-height: 44px;
  margin-top: 0;
}

/* 模块切换淡入（每次替换 innerHTML 时重新插入 DOM，动画自动重放） */
.account-modal__panel {
  animation: account-panel-fade-in 0.25s ease;
}

@keyframes account-panel-fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* My Account：只读信息行 */
.account-info-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.account-info-row:last-child {
  border-bottom: none;
}

.account-info-row__label {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.account-info-row__value {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
}

/* Address Book：可管理的地址卡片（区别于结账流程中可点选的 .address-card） */
.account-address-card {
  padding: 14px 16px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.5);
}

.account-address-card__header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.account-address-card__actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
}

.account-address-card__action-btn {
  background: none;
  border: none;
  color: var(--color-accent);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 0;
}

.account-address-card__action-btn:hover {
  text-decoration: underline;
}

.account-address-card__action-btn--danger {
  color: var(--color-error);
}

/* PayPal Account / 地址表单内的提交按钮沿用 .checkout-modal__form，
   这里只需让按钮不被拉伸到整行占满以外的行为（保持默认 .btn 样式） */
.account-modal__panel .checkout-modal__form .btn {
  align-self: flex-start;
  margin-top: 8px;
}

@media (max-width: 480px) {
  .account-modal__tab {
    font-size: 11px;
    padding: 14px 4px 12px;
  }

  .account-modal__content {
    padding: 20px 18px 24px;
  }

  .account-modal__footer {
    padding: 12px 18px 16px;
  }

  .modal-account .modal-close {
    width: 44px;
    height: 44px;
    top: 8px;
    right: 8px;
    font-size: 22px;
    z-index: 20;
    background: rgba(148, 163, 184, 0.25);
  }

  .account-modal__tabs {
    padding-right: 56px;
  }
}

/* ---------- 30. COA 查阅弹窗（第九章「COA 查阅弹窗设计」+ 第十章「COA 文件字段」） ---------- */
/* 弹窗自身固定尺寸见第7节 .modal-coa；这里覆盖为 flex 布局，让头部（标题+搜索框）
   固定不动，只有文件列表在 .coa-modal__body 内部滚动。 */
.modal-coa {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.coa-modal__header {
  flex-shrink: 0;
  padding: 24px 28px 16px;
  border-bottom: 1px solid var(--color-border);
}

.coa-modal__title {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 14px;
}

.coa-modal__search {
  position: relative;
  display: flex;
  align-items: center;
}

.coa-modal__search svg {
  position: absolute;
  left: 12px;
  color: var(--color-text-secondary);
  pointer-events: none;
}

.coa-modal__search-input {
  width: 100%;
  height: 40px;
  padding: 0 12px 0 36px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border-strong);
  background: rgba(15, 23, 42, 0.6);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 14px;
  transition: var(--transition-fast);
}

.coa-modal__search-input::placeholder {
  color: var(--color-text-secondary);
}

.coa-modal__search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
  outline: none;
}

.coa-modal__body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 16px 28px 28px;
}

.coa-file-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.coa-file-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.4);
  transition: var(--transition-fast);
}

.coa-file-item:hover {
  border-color: rgba(34, 211, 238, 0.35);
  background: rgba(15, 23, 42, 0.6);
}

.coa-file-item.is-previewing {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
}

.coa-file-item--skeleton {
  cursor: default;
}

.coa-file-item__thumb {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-input);
  background: rgba(148, 163, 184, 0.08);
  color: var(--color-text-secondary);
  overflow: hidden;
}

.coa-file-item__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.coa-file-item__thumb--placeholder {
  border: 1px dashed var(--color-border-strong);
}

.coa-file-item__info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.coa-file-item__name {
  background: none;
  border: none;
  padding: 0;
  text-align: left;
  color: #fff;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.coa-file-item__name:hover,
.coa-file-item__name:focus-visible {
  color: var(--color-accent);
  text-decoration: underline;
}

.coa-file-item__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 12px;
  color: var(--color-text-secondary);
  flex-wrap: wrap;
}

.coa-file-item__product {
  color: rgba(255, 255, 255, 0.75);
}

.coa-file-item__type-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid;
  flex-shrink: 0;
}

.coa-file-item__type-badge--pdf {
  color: #F87171;
  background: rgba(248, 113, 113, 0.12);
  border-color: rgba(248, 113, 113, 0.3);
}

.coa-file-item__type-badge--image {
  color: var(--color-accent);
  background: rgba(34, 211, 238, 0.12);
  border-color: rgba(34, 211, 238, 0.3);
}

.skeleton-line--coa-name { width: 55%; height: 14px; }
.skeleton-line--coa-meta { width: 35%; height: 12px; margin-top: 8px; margin-bottom: 0; }

/* 预览浮层：桌面端悬停/移动端第一次点击文件名时显示，固定停靠在弹窗右下角，
   避免为每一行单独计算气泡定位（.modal 基类已是 position:relative）。 */
.coa-modal__preview-dock {
  position: absolute;
  right: 20px;
  bottom: 20px;
  width: 160px;
  height: 160px;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  background: rgba(15, 23, 42, 0.95);
  z-index: 5;
  animation: coa-preview-fade-in 0.2s ease;
}

.coa-modal__preview-dock img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #0F172A;
}

@keyframes coa-preview-fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 480px) {
  .coa-modal__header {
    padding: 20px 18px 14px;
  }

  .coa-modal__body {
    padding: 14px 18px 20px;
  }

  .coa-file-item__meta {
    row-gap: 4px;
  }

  .coa-modal__preview-dock {
    left: 16px;
    right: 16px;
    bottom: 16px;
    width: auto;
    height: 180px;
  }
}

/* ---------- 31. 个人中心 - My Orders（第十四章「用户面板」订单列表 + 订单详情） ---------- */
.account-orders-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.account-order-card {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.5);
  color: inherit;
  font-family: var(--font-body);
  text-align: left;
  cursor: pointer;
  transition: var(--transition-fast);
}

.account-order-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 14px rgba(59, 130, 246, 0.2);
}

.account-order-card__image {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-input);
  object-fit: cover;
  background: rgba(148, 163, 184, 0.1);
  flex-shrink: 0;
}

.account-order-card__info {
  flex: 1;
  min-width: 0;
}

.account-order-card__name {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.account-order-card__meta {
  font-size: 11px;
  color: var(--color-text-secondary);
  margin: 0;
}

.account-order-card__aside {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  flex-shrink: 0;
}

.account-order-card__total {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
}

/* My Orders 列表骨架屏 */
.account-order-card--skeleton {
  cursor: default;
}

.account-order-card--skeleton:hover {
  border-color: var(--color-border);
  box-shadow: none;
}

.account-order-card--skeleton .skeleton-thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-input);
  flex-shrink: 0;
}

.account-order-card--skeleton .skeleton-line {
  width: 60%;
}

.account-order-card--skeleton .skeleton-line--short {
  width: 35%;
}

/* 订单状态徽章：与 B 文档 B.1「全局术语表」订单状态一一对应 */
.order-status-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  border: 1px solid;
  white-space: nowrap;
}

.order-status-badge--pending {
  color: #FBBF24;
  background: rgba(251, 191, 36, 0.12);
  border-color: rgba(251, 191, 36, 0.3);
}

.order-status-badge--review {
  color: var(--color-primary);
  background: rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.3);
}

.order-status-badge--paid,
.order-status-badge--completed {
  color: var(--color-success);
  background: rgba(74, 222, 128, 0.12);
  border-color: rgba(74, 222, 128, 0.3);
}

.order-status-badge--shipped {
  color: var(--color-accent);
  background: rgba(34, 211, 238, 0.12);
  border-color: rgba(34, 211, 238, 0.3);
}

.order-status-badge--overdue {
  color: var(--color-error);
  background: rgba(248, 113, 113, 0.12);
  border-color: rgba(248, 113, 113, 0.3);
}

.order-status-badge--cancelled {
  color: var(--color-text-secondary);
  background: rgba(148, 163, 184, 0.12);
  border-color: rgba(148, 163, 184, 0.25);
}

/* 订单详情 */
.order-detail__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin: 10px 0 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.order-detail__number {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 2px;
  font-family: var(--font-numeric);
}

.order-detail__date {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin: 0;
}

.order-detail__section {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.order-detail__section-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  margin: 0 0 8px;
}

.order-detail__text {
  font-size: 13px;
  color: var(--color-text-primary);
  margin: 0 0 2px;
  line-height: 1.5;
}

.modal-overlay--tracking {
  z-index: calc(var(--z-user-menu) + 40);
}

.modal-tracking {
  width: 480px;
}

.tracking-result {
  padding: 8px 28px 24px;
}

.tracking-result__meta {
  font-size: 13px;
  line-height: 1.6;
  margin: 0 0 4px;
}

.tracking-events {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  max-height: 40vh;
  overflow-y: auto;
}

.tracking-event {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}

.tracking-event:last-child {
  border-bottom: none;
}

.tracking-event__time {
  display: block;
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.tracking-event__desc {
  font-size: 13px;
  color: var(--color-text-primary);
}

.order-detail__countdown {
  text-align: center;
}

.order-detail__countdown-value {
  font-family: var(--font-numeric);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-accent);
  text-shadow: 0 0 10px rgba(34, 211, 238, 0.35);
  margin: 0;
}

.order-detail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.account-order-actions__cancel {
  color: var(--color-error);
  border-color: rgba(248, 113, 113, 0.4);
}

@media (max-width: 480px) {
  .account-order-card {
    padding: 10px 12px;
  }

  .order-detail__actions {
    flex-direction: column;
  }

  .order-detail__actions .btn {
    width: 100%;
  }
}

/* ---------- 32. 管理员面板（第十五章「管理员系统」）：布局 / 仪表板 / 订单表格 / 表单 ---------- */
.admin-status-screen[hidden],
.admin-layout[hidden],
.admin-module[hidden] {
  display: none;
}

.admin-status-screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  text-align: center;
  padding: 24px;
}

.admin-layout {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--color-navbar-bg-scrolled);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  padding: 24px 0;
}

.admin-sidebar__brand {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding: 0 24px 20px;
}

.admin-sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 12px;
}

.admin-sidebar__link {
  display: block;
  width: 100%;
  text-align: left;
  padding: 12px 16px;
  border-radius: var(--radius-button);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition-fast);
}

.admin-sidebar__link:hover {
  background: rgba(148, 163, 184, 0.08);
  color: var(--color-text-primary);
}

.admin-sidebar__link.active {
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-text-primary);
  box-shadow: inset 3px 0 0 var(--color-primary);
}

.admin-sidebar__link--soon {
  opacity: 0.55;
}

.admin-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.admin-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  flex-wrap: wrap;
  gap: 12px;
}

.admin-topbar__title {
  font-size: 20px;
  margin: 0;
}

.admin-topbar__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.admin-topbar__email {
  color: var(--color-text-secondary);
  font-size: 13px;
}

.admin-content {
  flex: 1;
  overflow-y: auto;
  padding: 28px 32px;
}

/* 仪表板统计卡片 */
.admin-dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.admin-stat-card {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}

.admin-stat-card--clickable {
  cursor: pointer;
}

.admin-stat-card__label {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.admin-stat-card__value {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text-primary);
}

/* 工具栏（筛选按钮 / 新增按钮） */
.admin-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

/* 支付账户管理：强制收款账户设置条 */
.admin-forced-account {
  margin-bottom: 20px;
  padding: 16px 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: rgba(15, 23, 42, 0.35);
}

.admin-forced-account__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.admin-forced-account__row .auth-modal__label {
  margin: 0;
}

.admin-forced-account__row .input {
  max-width: 280px;
}

.admin-forced-account .admin-form-hint {
  margin: 10px 0 0;
}

.admin-filter-btn {
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-strong);
  background: rgba(15, 23, 42, 0.4);
  color: var(--color-text-secondary);
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition-fast);
}

.admin-filter-btn:hover {
  color: var(--color-text-primary);
  border-color: var(--color-text-secondary);
}

.admin-filter-btn.active {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--color-primary);
  color: var(--color-text-primary);
}

/* 表格 */
.admin-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.admin-table th,
.admin-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.admin-table th {
  color: var(--color-text-secondary);
  font-weight: 600;
  background: rgba(15, 23, 42, 0.4);
}

.admin-table tbody tr:last-child td {
  border-bottom: none;
}

.admin-order-row {
  cursor: pointer;
  transition: var(--transition-fast);
}

.admin-order-row:hover {
  background: rgba(59, 130, 246, 0.08);
}

.admin-order-row--new {
  animation: admin-row-highlight 3s ease;
}

@keyframes admin-row-highlight {
  0% { background: rgba(34, 211, 238, 0.25); }
  100% { background: transparent; }
}

.admin-order-cell {
  display: flex;
  align-items: center;
  gap: 10px;
}

.admin-order-thumb {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  object-fit: cover;
  background: rgba(148, 163, 184, 0.15);
  flex-shrink: 0;
}

.admin-order-cell__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  white-space: normal;
}

.admin-order-cell__primary {
  color: var(--color-text-primary);
  font-weight: 600;
}

.admin-order-cell__secondary {
  color: var(--color-text-secondary);
  font-size: 12px;
}

/* 订单详情弹窗 / 设置面板通用卡片 */
.admin-panel-card {
  padding: 24px 28px;
  max-width: 560px;
}

.admin-legal-pages-panel {
  max-width: 800px;
}

.admin-legal-textarea {
  height: auto;
  min-height: 360px;
  padding: 12px 14px;
  resize: vertical;
  line-height: 1.6;
  font-size: 13px;
}

/* 设置表单内的说明文字（如"留空表示隐藏对应图标"） */
.admin-form-hint {
  color: var(--color-text-secondary);
  font-size: 13px;
  margin: -6px 0 4px;
}

.admin-detail-section {
  margin-bottom: 20px;
}

.admin-detail-section__title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  margin: 0 0 10px;
}

.admin-detail-section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.admin-detail-section__header .admin-detail-section__title {
  margin: 0;
}

.admin-detail-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  padding: 4px 0;
  color: var(--color-text-primary);
}

.admin-detail-row__label {
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

.admin-qr-preview {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border);
  object-fit: contain;
  background: #fff;
  margin-top: 10px;
}

.modal-admin-order {
  width: 640px;
}

.modal-admin-product {
  width: 640px;
}

.admin-checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 8px;
  cursor: pointer;
}

.admin-deal-modal {
  max-width: 640px;
}

.admin-deal-product-search {
  width: 100%;
  margin: 0 0 10px;
}

.admin-deal-product-list {
  max-height: 220px;
  overflow-y: auto;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: rgba(15, 23, 42, 0.35);
}

.admin-deal-product-list .admin-checkbox-label {
  margin-top: 0;
  padding: 6px 0;
}

.admin-deal-product-list .admin-checkbox-label[hidden] {
  display: none;
}

.admin-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
}

.admin-badge--on {
  background: rgba(74, 222, 128, 0.15);
  color: var(--color-success);
}

.admin-badge--off {
  background: rgba(148, 163, 184, 0.15);
  color: var(--color-text-secondary);
}

.admin-link-btn--danger {
  color: var(--color-error);
}

.checkout-modal__link-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  text-decoration: none;
}

/* 订单管理工具栏：筛选按钮组占据剩余空间，导出 CSV 按钮靠右 */
.admin-toolbar__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  flex: 1;
}

/* COA 文件管理：工具栏搜索框 + 列表缩略图 + 上传进度 */
.admin-toolbar__search {
  flex: 1;
  min-width: 200px;
  max-width: 360px;
}

.admin-coa-filename {
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: inline-block;
  vertical-align: middle;
}

.admin-coa-thumb-btn {
  display: inline-flex;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
}

.admin-coa-thumb {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.4);
  display: block;
}

.admin-coa-thumb--placeholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
}

.admin-coa-product-select {
  height: auto;
  min-height: 140px;
  padding: 8px;
}

.admin-coa-progress {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 4px 0 8px;
}

.admin-coa-progress[hidden] {
  display: none;
}

.admin-coa-progress__track {
  flex: 1;
  height: 6px;
  max-width: 220px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.2);
  overflow: hidden;
}

.admin-coa-progress__bar {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width 0.15s ease;
}

.admin-coa-progress__label {
  font-size: 12px;
  color: var(--color-text-secondary);
  min-width: 36px;
}

/* 产品编辑：搜索分类筛选、编辑弹窗文本域 / 变体行 / 图片预览 */
.admin-products-category-filter {
  width: auto;
  min-width: 180px;
  max-width: 240px;
}

.admin-product-textarea {
  height: auto;
  min-height: 96px;
  padding: 10px 12px;
  resize: vertical;
  line-height: 1.5;
}

.admin-product-effect-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}

.admin-product-variant-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.admin-product-variant-row:last-child {
  margin-bottom: 8px;
  padding-bottom: 0;
  border-bottom: none;
}

.admin-product-variant-row__fields {
  display: grid;
  grid-template-columns: 1fr 120px auto;
  gap: 8px;
  align-items: center;
}

.admin-product-variant-row__image {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.admin-product-variant-row__image-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.admin-product-variant-row__image .admin-form-hint {
  margin: 0;
}

.admin-product-variant-preview {
  width: 80px;
  height: 80px;
}

.admin-shipping-rules-panel {
  max-width: 720px;
}

.admin-shipping-tier {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto 1fr auto;
  gap: 8px 12px;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.admin-shipping-tier__range {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.admin-shipping-tier__fee-label {
  margin: 0;
}

.admin-shipping-tier .field-error {
  grid-column: 1 / -1;
  margin: 0;
}

.admin-shipping-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin: 4px 0 16px;
}

.admin-product-image {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.admin-product-image__preview {
  width: 160px;
  height: 100px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.4);
}

.admin-product-image__preview[hidden] {
  display: none;
}

/* 主页板块编辑：选项卡下方表单、主图/卡片图预览、4 个卡片条目 */
.admin-homepage-panel {
  max-width: 720px;
}

.admin-homepage-card {
  padding: 16px;
  margin: 4px 0 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: rgba(15, 23, 42, 0.25);
}

.admin-homepage-card__title {
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--color-text-primary);
}

.admin-homepage-image {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.admin-homepage-image__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.admin-homepage-image .input[type="file"] {
  max-width: 280px;
}

.admin-brand-story-paragraph {
  margin-bottom: 12px;
}

.admin-brand-story-paragraph__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

#admin-homepage-add-paragraph {
  margin: 4px 0 20px;
}

/* 订单详情「用户信息」区域的复制退款邮箱 / 复制地址按钮 */
.admin-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}

/* 发货倒计时（列表新增列 + 订单详情弹窗提示） */
.admin-shipping-countdown {
  font-family: var(--font-numeric);
  font-weight: 600;
  color: var(--color-accent);
}

.admin-shipping-countdown--overdue {
  color: var(--color-error);
}

@media (max-width: 768px) {
  .admin-layout {
    flex-direction: column;
    height: auto;
  }

  .admin-sidebar {
    width: 100%;
    flex-direction: row;
    overflow-x: auto;
    padding: 12px;
  }

  .admin-sidebar__brand {
    display: none;
  }

  .admin-sidebar__nav {
    flex-direction: row;
    padding: 0;
  }

  .admin-sidebar__link {
    white-space: nowrap;
  }

  .admin-sidebar__link.active {
    box-shadow: inset 0 -3px 0 var(--color-primary);
  }

  .admin-main {
    height: auto;
  }

  .admin-content {
    padding: 20px 16px;
  }

  .modal-admin-order,
  .modal-admin-product {
    width: 95%;
  }
}

/* ---------- 33. 聊天系统（第十七章数据结构 + 第十五章客户聊天）：
   用户端非模态悬浮窗口 / 管理员端内嵌聊天模块 / 聊天气泡共用样式 ---------- */

/* 用户端聊天窗口：非模态，无遮罩层，桌面右下角弹出，移动端右侧滑出全屏面板 */
.chat-widget {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 420px;
  height: 600px;
  max-height: calc(100vh - 48px);
  display: flex;
  flex-direction: column;
  background: var(--color-dropdown-bg);
  backdrop-filter: var(--blur-glass-strong);
  -webkit-backdrop-filter: var(--blur-glass-strong);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  z-index: var(--z-chat-widget);
  opacity: 0;
  transform: translateY(16px) scale(0.98);
  animation: chat-widget-in-desktop 0.25s ease forwards;
  overflow: hidden;
}

.chat-widget.closing {
  animation: chat-widget-out-desktop 0.2s ease forwards;
}

@keyframes chat-widget-in-desktop {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes chat-widget-out-desktop {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }
}

.chat-widget__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.chat-widget__title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 15px;
  color: var(--color-text-primary);
}

.chat-widget__close {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  border: none;
  background: rgba(148, 163, 184, 0.1);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  line-height: 1;
  transition: var(--transition-fast);
}

.chat-widget__close:hover {
  background: rgba(248, 113, 113, 0.15);
  color: var(--color-error);
}

.chat-widget__messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-widget__empty {
  margin: auto;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 14px;
  max-width: 260px;
}

.chat-widget__composer {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

.chat-widget__attach-btn {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid var(--color-border-strong);
  background: rgba(148, 163, 184, 0.08);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.chat-widget__attach-btn:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.chat-widget__input {
  flex: 1;
  resize: none;
  max-height: 120px;
  padding: 9px 12px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border-strong);
  background: rgba(15, 23, 42, 0.4);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.4;
}

.chat-widget__input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.chat-widget__send-btn {
  flex-shrink: 0;
  padding: 9px 16px;
  font-size: 13px;
}

/* 聊天气泡：用户端 / 管理员端共用布局，颜色按「己方/对方」区分 */
.chat-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  max-width: 86%;
}

.chat-row--mine {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.chat-row--theirs {
  align-self: flex-start;
}

.chat-avatar {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  box-shadow: inset 0 0 8px rgba(255, 255, 255, 0.25);
}

.chat-bubble {
  min-width: 0;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.chat-bubble__content {
  padding: 9px 12px;
  border-radius: 14px;
  font-size: 13px;
  line-height: 1.5;
  word-break: break-word;
}

.chat-bubble__text {
  margin: 0;
  white-space: pre-wrap;
}

.chat-bubble__placeholder {
  margin: 0;
  font-size: 12px;
  font-style: italic;
  color: var(--color-text-secondary);
}

.chat-bubble__image {
  max-width: 200px;
  max-height: 200px;
  border-radius: 10px;
  display: block;
  object-fit: cover;
}

.chat-bubble__time {
  font-size: 11px;
  color: var(--color-text-secondary);
  padding: 0 4px;
}

/* 用户端聊天窗口：己方（用户）靠右电光蓝，对方（管理员）靠左浅灰 */
.chat-bubble--user-mine {
  align-self: flex-end;
  align-items: flex-end;
}

.chat-bubble--user-mine .chat-bubble__content {
  background: var(--color-primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.chat-bubble--user-theirs {
  align-self: flex-start;
  align-items: flex-start;
}

.chat-bubble--user-theirs .chat-bubble__content {
  background: rgba(226, 232, 240, 0.12);
  color: var(--color-text-primary);
  border-bottom-left-radius: 4px;
}

/* 管理员端聊天窗口：己方（管理员）靠右深色，对方（用户）靠左浅灰 */
.chat-bubble--admin-mine {
  align-self: flex-end;
  align-items: flex-end;
}

.chat-bubble--admin-mine .chat-bubble__content {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid var(--color-border-strong);
  color: var(--color-text-primary);
  border-bottom-right-radius: 4px;
}

.chat-bubble--admin-theirs {
  align-self: flex-start;
  align-items: flex-start;
}

.chat-bubble--admin-theirs .chat-bubble__content {
  background: rgba(226, 232, 240, 0.12);
  color: var(--color-text-primary);
  border-bottom-left-radius: 4px;
}

/* 移动端出于防滚动穿透需要临时锁定 body 滚动；桌面端非模态允许背景页面滚动。 */
@media (max-width: 768px) {
  body.chat-widget-open {
    overflow: hidden;
  }

  .chat-widget {
    right: 0;
    bottom: 0;
    top: auto;
    width: 100%;
    height: 80vh;
    max-height: 80vh;
    border-radius: var(--radius-card) var(--radius-card) 0 0;
    opacity: 1;
    transform: translateX(100%);
    animation-name: chat-widget-in-mobile;
    z-index: var(--z-chat-widget);
  }

  .chat-widget.closing {
    animation-name: chat-widget-out-mobile;
  }

  @keyframes chat-widget-in-mobile {
    from { transform: translateX(100%); opacity: 1; }
    to { transform: translateX(0); opacity: 1; }
  }

  @keyframes chat-widget-out-mobile {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 1; }
  }

  .chat-widget__header {
    padding-top: max(12px, env(safe-area-inset-top, 0px));
    position: sticky;
    top: 0;
    z-index: 20;
    background: var(--color-dropdown-bg);
  }

  .chat-widget__close {
    width: 44px;
    height: 44px;
    font-size: 22px;
  }
}

/* 管理员端客户聊天模块：内嵌两栏布局（会话列表 + 聊天窗口），整体固定 500px 高 */
.admin-chat {
  display: flex;
  height: 500px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.admin-chat__list {
  width: 320px;
  flex-shrink: 0;
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
}

.admin-chat__panel {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.admin-chat-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  transition: var(--transition-fast);
}

.admin-chat-row:hover {
  background: rgba(59, 130, 246, 0.08);
}

.admin-chat-row--active {
  background: rgba(59, 130, 246, 0.15);
}

.admin-chat-row--unread .admin-chat-row__name {
  color: var(--color-text-primary);
  font-weight: 700;
}

.admin-chat-row__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.admin-chat-row__name,
.admin-chat-row__email,
.admin-chat-row__preview {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-chat-row__name {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.admin-chat-row__email {
  font-size: 12px;
  color: var(--color-text-secondary);
}

.admin-chat-row__preview {
  font-size: 12px;
  color: var(--color-text-secondary);
}

.admin-chat-row__meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  flex-shrink: 0;
}

.admin-chat-row__time {
  font-size: 11px;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.admin-chat-row__badge {
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 9px;
  background: var(--color-error);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.admin-chat__panel-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.admin-chat__back-btn {
  display: none;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: none;
  background: rgba(148, 163, 184, 0.1);
  color: var(--color-text-secondary);
  font-size: 16px;
}

.admin-chat__panel-user {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.admin-chat__panel-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.admin-chat__panel-email {
  font-size: 12px;
  color: var(--color-text-secondary);
}

.admin-chat__panel-actions {
  display: flex;
  gap: 14px;
  flex-shrink: 0;
}

.admin-chat__messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.admin-chat__quick-replies {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 16px 10px;
  flex-shrink: 0;
}

.admin-chat__quick-reply-btn {
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-strong);
  background: rgba(15, 23, 42, 0.4);
  color: var(--color-text-secondary);
  font-size: 12px;
  transition: var(--transition-fast);
}

.admin-chat__quick-reply-btn:hover {
  color: var(--color-text-primary);
  border-color: var(--color-primary);
}

.admin-chat__composer {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

@media (max-width: 900px) {
  .admin-chat__list,
  .admin-chat__panel {
    width: 100%;
  }

  .admin-chat__panel {
    display: none;
  }

  .admin-chat--show-panel .admin-chat__list {
    display: none;
  }

  .admin-chat--show-panel .admin-chat__panel {
    display: flex;
  }

  .admin-chat__back-btn {
    display: flex;
  }
}

.admin-user-orders-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.admin-user-orders-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.35);
  color: var(--color-text-primary);
  text-align: left;
  cursor: pointer;
  transition: var(--transition-fast);
}

.admin-user-orders-row:hover {
  border-color: var(--color-primary);
  background: rgba(15, 23, 42, 0.55);
}

.admin-user-orders-row__number {
  font-weight: 600;
  font-size: 14px;
}

.admin-user-orders-row__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  font-size: 13px;
}

.admin-user-orders-row__status {
  color: var(--color-text-secondary);
}