/* idcub · 全站基础、排版、公共组件、工具类与反馈；公共组件只在此维护。
   组件与依赖说明：../docs/CSS-ARCHITECTURE.md。 */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  font-family: var(--nv-font);
  font-size: var(--nv-fs-body);
  line-height: var(--nv-lh-body);
  letter-spacing: var(--nv-ls-body);
  color: var(--nv-text-primary);
  background: var(--nv-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-synthesis-weight: none;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

#nv-main:not(.nv-auth) {
  flex: 1 0 auto;
}

.nv-footer {
  flex: 0 0 auto;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

img, picture, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
  margin: 0;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

a {
  color: var(--nv-brand-ink);
  text-decoration: none;
  transition: color var(--nv-dur-fast) var(--nv-ease-out);
}

a:hover {
  color: var(--nv-brand-hover);
}

hr {
  border: 0;
  border-top: 1px solid var(--nv-border-soft);
  margin: var(--nv-space-6) 0;
}

table {
  border-collapse: collapse;
  width: 100%;
}

.nv-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;
}

.nv-skip-link {
  position: absolute;
  top: -100px;
  left: var(--nv-space-4);
  z-index: var(--nv-z-toast);
  padding: var(--nv-space-3) var(--nv-space-5);
  background: var(--nv-brand-solid);
  color: var(--nv-text-on-solid);
  border-radius: var(--nv-radius-md);
  font-weight: var(--nv-weight-medium);
  transition: top var(--nv-dur-fast) var(--nv-ease-out);
}

.nv-skip-link:focus {
  top: var(--nv-space-3);
  color: var(--nv-text-on-solid);
}

:focus-visible {
  outline: none;
  box-shadow: var(--nv-ring);
  border-radius: var(--nv-radius-sm);
}

.nv-container {
  width: 100%;
  max-width: var(--nv-container);
  margin-inline: auto;
  padding-inline: var(--nv-space-4);
}

@media (min-width: 768px) {
  .nv-container {
    padding-inline: var(--nv-space-6);
  }
}

@media (min-width: 1280px) {
  .nv-container {
    padding-inline: var(--nv-space-8);
  }
}

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

.nv-display {
  font-size: var(--nv-fs-display);
  line-height: var(--nv-lh-display);
  letter-spacing: var(--nv-ls-display);
  font-weight: var(--nv-weight-bold);
}

.nv-title {
  font-size: var(--nv-fs-title);
  line-height: var(--nv-lh-display);
  letter-spacing: var(--nv-ls-title);
  font-weight: var(--nv-weight-bold);
}

.nv-heading {
  font-size: var(--nv-fs-heading);
  line-height: var(--nv-lh-heading);
  letter-spacing: var(--nv-ls-heading);
  font-weight: var(--nv-weight-medium);
}

.nv-body {
  font-size: var(--nv-fs-body);
  line-height: var(--nv-lh-body);
}

.nv-caption {
  font-size: var(--nv-fs-caption);
  line-height: var(--nv-lh-tight);
  letter-spacing: var(--nv-ls-small);
  color: var(--nv-text-muted);
}

.nv-micro {
  font-size: var(--nv-fs-micro);
  line-height: var(--nv-lh-tight);
  letter-spacing: var(--nv-ls-small);
  color: var(--nv-text-muted);
}

.nv-clamp-1,
.nv-clamp-2,
.nv-clamp-3 {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.nv-clamp-1 {
  -webkit-line-clamp: 1;
}

.nv-clamp-2 {
  -webkit-line-clamp: 2;
}

.nv-clamp-3 {
  -webkit-line-clamp: 3;
}

.nv-num {
  font-family: var(--nv-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

.nv-btn,
:root[data-theme] .uc-cta,
:root[data-theme] .uc-quick {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--nv-space-2);
  min-height: var(--nv-tap-min);
  padding: var(--nv-space-2) var(--nv-space-5);
  border-radius: var(--nv-radius-btn);
  border: 1px solid transparent;
  font-size: var(--nv-fs-body);
  font-weight: var(--nv-weight-medium);
  letter-spacing: var(--nv-ls-small);
  text-align: center;
  cursor: pointer;
  user-select: none;
  transition: background-color var(--nv-dur-fast) var(--nv-ease-out),
    border-color var(--nv-dur-fast) var(--nv-ease-out),
    color var(--nv-dur-fast) var(--nv-ease-out),
    box-shadow var(--nv-dur-normal) var(--nv-ease-out),
    transform var(--nv-dur-fast) var(--nv-ease-out);
  height: auto;
  background-image: none;
  box-shadow: none;
  text-decoration: none;
  white-space: nowrap;
}

.nv-btn:active:not(:disabled),
:root[data-theme] .uc-cta:active:not(:disabled),
:root[data-theme] .uc-quick:active:not(:disabled) {
  transform: translateY(1px);
}

.nv-btn:disabled,
.nv-btn[aria-disabled="true"],
:root[data-theme] .uc-cta:disabled,
:root[data-theme] .uc-quick:disabled,
:root[data-theme] .uc-cta[aria-disabled="true"],
:root[data-theme] .uc-quick[aria-disabled="true"] {
  opacity: .45;
  cursor: not-allowed;
  pointer-events: none;
}

.nv-btn--primary {
  background-image: var(--nv-gradient);
  color: var(--nv-text-on-solid);
  box-shadow: var(--nv-shadow-brand);
}

.nv-btn--primary:hover:not(:disabled) {
  color: var(--nv-text-on-solid);
  box-shadow: 0 16px 34px -14px rgba(37, 99, 235, .55);
  transform: translateY(-1px);
}

.nv-btn--solid,
:root[data-theme] .uc-cta,
:root[data-theme] .uc-quick {
  background-color: var(--nv-brand-solid);
  color: var(--nv-text-on-solid);
}

.nv-btn--solid:hover:not(:disabled),
:root[data-theme] .uc-cta:hover:not(:disabled),
:root[data-theme] .uc-quick:hover:not(:disabled) {
  background-color: var(--nv-brand-hover);
  color: var(--nv-text-on-solid);
}

.nv-btn--neutral {
  background-color: var(--nv-soft);
  border-color: var(--nv-border);
  color: var(--nv-text-primary);
}

.nv-btn--neutral:hover:not(:disabled) {
  background-color: var(--nv-muted);
  border-color: var(--nv-border-strong);
  color: var(--nv-text-primary);
}

.nv-btn--ghost,
:root[data-theme] .uc-cta--ghost,
:root[data-theme] .uc-quick--ghost {
  background-color: transparent;
  border-color: var(--nv-border-strong);
  color: var(--nv-text-primary);
}

.nv-btn--ghost:hover:not(:disabled),
:root[data-theme] .uc-cta--ghost:hover:not(:disabled),
:root[data-theme] .uc-quick--ghost:hover:not(:disabled) {
  background-color: var(--nv-brand-soft);
  border-color: var(--nv-border-brand);
  color: var(--nv-brand-ink);
}

.nv-btn--danger {
  background-color: var(--nv-danger-soft);
  color: var(--nv-danger-ink);
}

.nv-btn--danger:hover:not(:disabled) {
  background-color: var(--nv-danger);
  color: #fff;
}

.nv-btn--sm,
:root[data-theme] .uc-quick {
  min-height: var(--nv-control-sm-height);
  padding: var(--nv-space-1) var(--nv-space-3);
  font-size: var(--nv-fs-caption);
}

.nv-btn--lg {
  min-height: var(--nv-control-lg-height);
  padding: var(--nv-space-3) var(--nv-space-8);
  font-size: var(--nv-fs-heading);
}

.nv-btn--block {
  display: flex;
  width: 100%;
}

.nv-field {
  display: block;
  margin-bottom: var(--nv-space-4);
}

.nv-label {
  display: block;
  margin-bottom: var(--nv-space-2);
  font-size: var(--nv-fs-caption);
  font-weight: var(--nv-weight-medium);
  color: var(--nv-text-secondary);
  letter-spacing: var(--nv-ls-small);
}

.nv-input,
.nv-select,
.nv-textarea,
:root[data-theme] .mb-page :is(.layui-input, .form-control, .layui-textarea),
:root[data-theme] .mb-page .uc-card .form-body :is(.layui-input, .form-control, .layui-textarea, .layui-select, select) {
  display: block;
  width: 100%;
  min-height: var(--nv-tap-min);
  padding: var(--nv-space-3) var(--nv-space-4);
  background-color: var(--nv-elevated);
  border: 1px solid var(--nv-border);
  border-radius: var(--nv-radius-btn);
  font-size: var(--nv-control-font-size);
  color: var(--nv-text-primary);
  transition: border-color var(--nv-dur-fast) var(--nv-ease-out),
    box-shadow var(--nv-dur-fast) var(--nv-ease-out);
}

.nv-textarea,
:root[data-theme] .mb-page .layui-textarea {
  min-height: 96px;
  resize: vertical;
  line-height: var(--nv-lh-body);
}

.nv-input::placeholder,
.nv-textarea::placeholder,
:root[data-theme] .mb-page :is(.layui-input, .form-control, .layui-textarea)::placeholder,
:root[data-theme] .mb-page .uc-card .form-body :is(.layui-input, .form-control, .layui-textarea, .layui-select, select)::placeholder {
  color: var(--nv-text-muted);
}

.nv-input:focus,
.nv-select:focus,
.nv-textarea:focus,
:root[data-theme] .mb-page :is(.layui-input, .form-control, .layui-textarea):focus,
:root[data-theme] .mb-page .uc-card .form-body :is(.layui-input, .form-control, .layui-textarea, .layui-select, select):focus {
  outline: none;
  border-color: var(--nv-brand);
  box-shadow: var(--nv-ring);
}

.nv-input:disabled,
:root[data-theme] .mb-page :is(.layui-input, .form-control, .layui-textarea):disabled,
:root[data-theme] .mb-page .uc-card .form-body :is(.layui-input, .form-control, .layui-textarea, .layui-select, select):disabled {
  background-color: var(--nv-soft);
  color: var(--nv-text-muted);
  cursor: not-allowed;
}

:root[data-theme] :is(.nv-input, .nv-select, .nv-textarea).is-invalid,
:root[data-theme] :is(.nv-input, .nv-select, .nv-textarea)[aria-invalid="true"] {
  border-color: var(--nv-danger);
  background-color: var(--nv-danger-soft);
  box-shadow: var(--nv-ring-danger);
}

:root[data-theme] :is(.nv-input, .nv-select, .nv-textarea).is-invalid:focus,
:root[data-theme] :is(.nv-input, .nv-select, .nv-textarea)[aria-invalid="true"]:focus {
  border-color: var(--nv-danger);
  box-shadow: var(--nv-ring-danger);
}

.nv-field-tip {
  margin: 6px 0 0;
  font-size: var(--nv-fs-micro);
  line-height: 1.5;
  color: var(--nv-danger-ink, var(--nv-danger));
}

.nv-select {
  appearance: none;
  padding-right: var(--nv-space-10);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%236e6e73' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--nv-space-4) center;
  cursor: pointer;
}

.nv-hint {
  margin-top: var(--nv-space-2);
}

.nv-error {
  margin-top: var(--nv-space-2);
  font-size: var(--nv-fs-micro);
  color: var(--nv-danger-ink);
}

.nv-card,
:root[data-theme] .mb-page .uc-card,
.mb-card,
.aff-card {
  background-color: var(--nv-elevated);
  border: 1px solid var(--nv-border-soft);
  border-radius: var(--nv-radius-card);
  box-shadow: var(--nv-shadow-1);
}

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

.nv-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--nv-radius-btn);
  color: var(--nv-text-secondary);
  transition: background-color var(--nv-dur-fast) var(--nv-ease-out);
}

.nv-icon-btn:hover {
  background-color: var(--nv-brand-softer);
  color: var(--nv-brand-ink);
}

.nv-icon-btn svg {
  width: 18px;
  height: 18px;
}

.nv-footer {
  margin-top: var(--nv-space-8);
  border-top: 1px solid var(--nv-border-soft);
  background-color: var(--nv-elevated);
}

.nv-footer__top {
  display: flex;
  align-items: flex-start;
  gap: var(--nv-space-5);
  flex-wrap: wrap;
  padding: var(--nv-space-5) 0 var(--nv-space-4);
}

.nv-footer__brand {
  display: flex;
  align-items: center;
  gap: var(--nv-space-2);
  flex: 0 0 auto;
  margin-top: 2px;
}

.nv-footer__slogan {
  margin: 0;
  flex: 1 1 28ch;
  min-width: 0;
  font-size: var(--nv-fs-caption);
  line-height: 1.6;
  color: var(--nv-text-muted);
  max-width: 52ch;
  word-break: keep-all;
  overflow-wrap: break-word;
  text-wrap: balance;
}

.nv-footer__contact {
  display: flex;
  align-items: center;
  gap: var(--nv-space-2);
  flex-wrap: wrap;
  margin-left: auto;
  flex: 0 0 auto;
}

.nv-footer__contact-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 12px;
  border-radius: var(--nv-radius-pill);
  background-color: var(--nv-soft);
  font-size: var(--nv-fs-micro);
  color: var(--nv-text-muted);
  transition: background-color var(--nv-dur-fast) var(--nv-ease-out),
    color var(--nv-dur-fast) var(--nv-ease-out);
}

.nv-footer__contact-item:hover {
  background-color: var(--nv-brand-soft);
  color: var(--nv-brand-ink);
}

.nv-footer__contact-item .material-icons-outlined {
  font-size: var(--nv-icon-sm);
}

.nv-footer__bottom {
  display: flex;
  align-items: center;
  gap: var(--nv-space-4);
  flex-wrap: wrap;
  padding: var(--nv-space-3) 0;
  border-top: 1px solid var(--nv-border-soft);
}

.nv-footer__copy {
  font-size: var(--nv-fs-micro);
  color: var(--nv-text-faint);
}

.nv-footer__badges {
  display: flex;
  align-items: center;
  gap: var(--nv-space-4);
  flex-wrap: wrap;
  margin-left: auto;
}

.nv-footer__badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: var(--nv-fs-micro);
  color: var(--nv-text-muted);
  white-space: nowrap;
}

.nv-footer__badge .material-icons-outlined {
  font-size: 14px;
  color: var(--nv-text-faint);
}

.nv-footer__badge--link {
  text-decoration: none;
  transition: color var(--nv-dur-fast) var(--nv-ease-out);
}

.nv-footer__badge--link:hover {
  color: var(--nv-brand-ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.nv-footer__badge--link:hover .material-icons-outlined {
  color: var(--nv-brand-ink);
}

@media (max-width: 900px) {
  .nv-footer__slogan {
    flex: 1 1 100%;
    max-width: none;
  }

  .nv-footer__contact {
    margin-left: 0;
    flex: 1 1 100%;
  }

  .nv-footer__badges {
    margin-left: 0;
    flex: 1 1 100%;
  }
}

.nv-notice {
  display: flex;
  align-items: center;
  gap: var(--nv-space-2);
  padding: var(--nv-space-2) var(--nv-space-3);
  background-color: var(--nv-brand-soft);
  border-radius: var(--nv-radius-card);
  font-size: var(--nv-fs-caption);
  color: var(--nv-brand-ink);
}

.nv-notice svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.nv-notice__text {
  flex: 1;
}

.nv-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--nv-space-3);
  padding: var(--nv-space-16) var(--nv-space-4);
  text-align: center;
}

.nv-empty svg {
  width: 40px;
  height: 40px;
  color: var(--nv-text-faint);
}

.nv-empty__title {
  font-size: var(--nv-fs-heading);
  font-weight: var(--nv-weight-medium);
}

.nv-empty__text {
  font-size: var(--nv-fs-caption);
  color: var(--nv-text-muted);
  max-width: 34ch;
}

.nv-empty--soft {
  padding: var(--nv-space-10) var(--nv-space-6);
  border: 1px dashed var(--nv-border);
  border-radius: var(--nv-radius-xl);
  background-color: var(--nv-soft);
}

.nv-empty__action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: var(--nv-space-3);
  padding: 10px var(--nv-space-5);
  border-radius: var(--nv-radius-pill);
  background-color: var(--nv-brand-solid);
  color: var(--nv-text-on-solid);
  font-size: var(--nv-fs-caption);
  font-weight: var(--nv-weight-medium);
  transition: background-color var(--nv-dur-fast) var(--nv-ease-out),
              transform var(--nv-dur-fast) var(--nv-ease-out);
}

.nv-empty__action:hover {
  background-color: var(--nv-brand-hover);
  transform: translateY(-1px);
}

.nv-empty__action:active {
  transform: translateY(0);
}

.nv-skeleton {
  background: linear-gradient(90deg, var(--nv-soft) 25%, var(--nv-muted) 50%, var(--nv-soft) 75%);
  background-size: 200% 100%;
  animation: nv-shimmer 1.4s ease-in-out infinite;
  border-radius: var(--nv-radius-card);
}

.nv-rich {
  color: var(--nv-text-primary);
}

.nv-rich :where(h1, h2, h3, h4) {
  font-weight: var(--nv-weight-bold);
  letter-spacing: var(--nv-ls-heading);
}

.nv-rich :where(a) {
  color: var(--nv-brand-ink);
}

.nv-rich :where(blockquote) {
  border-left: 3px solid var(--nv-brand);
  background-color: var(--nv-brand-softer);
  color: var(--nv-text-secondary);
}

.nv-rich :where(th) {
  background-color: var(--nv-soft);
}

.nv-rich :where(img) {
  display: block;
  max-width: 100%;
  height: auto;
  margin-inline: auto;
  border-radius: var(--nv-radius-card);
}

.nv-rich :where(p:has(> img)) {
  margin-block: var(--nv-space-4);
}

.nv-rich :where(video, iframe) {
  display: block;
  max-width: 100%;
  margin-inline: auto;
  border: 0;
  border-radius: var(--nv-radius-card);
}

.nv-rich :where(pre, table) {
  max-width: 100%;
  overflow-x: auto;
}

.nv-rich {
  overflow-wrap: anywhere;
}

.nv-flex {
  display: flex;
}

.nv-items-center {
  align-items: center;
}

.nv-justify-between {
  justify-content: space-between;
}

.nv-gap-1 {
  gap: var(--nv-space-1);
}

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

.nv-gap-3 {
  gap: var(--nv-space-3);
}

.nv-gap-4 {
  gap: var(--nv-space-4);
}

.nv-inline {
  display: inline !important;
}

.nv-block {
  display: block;
}

.nv-mt-2 {
  margin-top: var(--nv-space-2);
}

.nv-mt-4 {
  margin-top: var(--nv-space-4);
}

.nv-mt-6 {
  margin-top: var(--nv-space-6);
}

.nv-mb-2 {
  margin-bottom: var(--nv-space-2);
}

.nv-mb-4 {
  margin-bottom: var(--nv-space-4);
}

.nv-mb-6 {
  margin-bottom: var(--nv-space-6);
}

.nv-text-center {
  text-align: center;
}

@media print {
  body {
    background: #fff;
  }
}

.nv-hidden {
  display: none !important;
}

:root {
  --nv-icon-sm: 16px;
  --nv-icon-md: 20px;
  --nv-icon-lg: 24px;
}

.nv-badge .material-icons-outlined,
.nv-btn .material-icons-outlined,
.nv-label .material-icons-outlined {
  font-size: var(--nv-icon-sm);
}

.fa-duotone, .fa-regular, .fa-solid {
  line-height: 1;
  vertical-align: -0.125em;
}

.nv-icon--muted {
  color: var(--nv-text-muted);
}

.nv-icon--faint {
  color: var(--nv-text-faint);
}

.nv-captcha {
  display: flex;
  align-items: stretch;
  gap: var(--nv-space-2);
}

.nv-captcha > .nv-input {
  flex: 1;
  min-width: 0;
}

.nv-captcha > .nv-btn {
  flex: 0 0 auto;
  align-self: stretch;
  min-height: auto;
}

.nv-pwd {
  position: relative;
  display: block;
}

.nv-pwd > .nv-input {
  padding-right: 44px;
}

.nv-pwd__btn {
  position: absolute;
  top: 50%;
  right: 6px;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  border-radius: var(--nv-radius-chip);
  background: transparent;
  color: var(--nv-text-faint);
  cursor: pointer;
  transition: color var(--nv-dur-fast) var(--nv-ease-out),
    background-color var(--nv-dur-fast) var(--nv-ease-out);
}

.nv-pwd__btn .material-icons-outlined {
  font-size: var(--nv-icon-md);
}

.nv-pwd__btn:hover {
  color: var(--nv-text-secondary);
  background-color: var(--nv-soft);
}

.nv-pwd__btn:focus-visible {
  outline: 2px solid var(--nv-brand);
  outline-offset: 1px;
}

.nv-pwd__btn[aria-pressed="true"] {
  color: var(--nv-brand-ink);
}

.nv-captcha > .image-code,
.image-code {
  flex: 0 0 auto;
  height: var(--nv-tap-min);
  width: auto;
  min-width: 96px;
  border-radius: var(--nv-radius-btn);
  border: 1px solid var(--nv-border);
  background-color: #fff;
  object-fit: cover;
  cursor: pointer;
  transition: border-color var(--nv-dur-fast) var(--nv-ease-out);
}

.image-code:hover {
  border-color: var(--nv-border-brand);
}

.prompt-image-code {
  display: block;
  height: 44px;
  margin: 0 auto var(--nv-space-3);
  border-radius: var(--nv-radius-btn);
  border: 1px solid var(--nv-border);
  background-color: #fff;
  cursor: pointer;
}

.nv-check {
  display: flex;
  align-items: center;
  gap: var(--nv-space-2);
  margin-bottom: 0;
  cursor: pointer;
}

.nv-check > input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--nv-brand-solid);
}

.nv-turnstile {
  display: flex;
  justify-content: center;
  margin: 0 0 var(--nv-space-4);
}

.nv-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px;
  margin-bottom: var(--nv-space-4);
  font-size: var(--nv-fs-caption);
  color: var(--nv-text-muted);
}

.nv-breadcrumb a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  border-radius: var(--nv-radius-chip);
  color: var(--nv-text-muted);
  transition: background-color var(--nv-dur-fast) var(--nv-ease-out),
              color var(--nv-dur-fast) var(--nv-ease-out);
}

.nv-breadcrumb a:hover {
  background-color: var(--nv-brand-soft);
  color: var(--nv-brand-ink);
}

.nv-breadcrumb__sep {
  display: inline-flex;
  align-items: center;
  color: var(--nv-breadcrumb-sep);
  font-size: 0;
  flex: 0 0 auto;
}

.nv-breadcrumb__sep::before {
  content: "";
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-top: 1.5px solid currentColor;
  transform: rotate(45deg);
  border-radius: 1px;
}

.nv-breadcrumb .material-icons-outlined {
  font-size: 14px;
}

.nv-breadcrumb__cat [data-nv-crumb-parent],
.nv-breadcrumb__cat [data-nv-crumb-self] {
  padding: 4px 9px;
  color: var(--nv-text-muted);
  white-space: nowrap;
}

.nv-breadcrumb__link.is-current {
  color: var(--nv-text-primary);
  font-weight: var(--nv-weight-medium);
}

.nv-breadcrumb__cat [data-nv-crumb-parent],
.nv-breadcrumb__cat [data-nv-crumb-self] {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 900px) {
  .nv-breadcrumb__cat [data-nv-crumb-self] .nv-breadcrumb__link,
  .nv-breadcrumb > a {
    padding: 8px 10px;
  }
}

.nv-breadcrumb__cat[hidden],
.nv-breadcrumb__sep[hidden] {
  display: none !important;
}

.nv-breadcrumb > :last-child {
  padding: 4px 9px;
  color: var(--nv-text-primary);
  font-weight: var(--nv-weight-medium);
  max-width: 42ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .nv-breadcrumb > :last-child {
    max-width: 20ch;
  }

  .nv-breadcrumb a {
    padding: 4px 6px;
  }
}

@keyframes nv-shimmer {
  0% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0 50%;
  }
}

.nv-page-head__title {
  font-size: var(--nv-fs-title);
  font-weight: var(--nv-weight-bold);
  letter-spacing: var(--nv-ls-title);
  line-height: 1.2;
  color: var(--nv-text-primary);
}

.nv-page-head__sub {
  margin-top: var(--nv-space-1);
  font-size: var(--nv-fs-caption);
  color: var(--nv-text-muted);
}

.nv-section-title {
  font-size: var(--nv-fs-heading);
  font-weight: var(--nv-weight-bold);
  letter-spacing: var(--nv-ls-heading);
  color: var(--nv-text-primary);
}

#nv-main {
  --q-max: 100%;
}

.nv-copy-toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%) translateY(12px);
  padding: 10px 18px;
  border-radius: var(--nv-radius-pill);
  background-color: var(--nv-text-primary);
  color: var(--nv-page);
  font-size: var(--nv-fs-caption);
  font-weight: var(--nv-weight-bold);
  box-shadow: var(--nv-shadow-2);
  opacity: 0;
  pointer-events: none;
  transition: opacity .28s var(--nv-ease-out, ease), transform .28s var(--nv-ease-out, ease);
  z-index: 9999;
}

.nv-copy-toast.is-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.nv-block {
  margin-bottom: var(--nv-space-4);
}

.nv-crown--sm {
  font-size: 1.05em;
  line-height: 1;
}

#toast-container.toast-top-right {
  top: 16px;
  right: 16px;
}

#toast-container > div {
  background-image: none !important;
  padding: 14px 16px !important;
  min-width: 280px;
  max-width: 360px;
  border-radius: var(--nv-radius-lg) !important;
  border: .5px solid var(--nv-border-soft);
  box-shadow: 0 18px 38px -24px rgba(0, 0, 0, .30),
              0 10px 24px -18px rgba(0, 0, 0, .26) !important;
  font-size: var(--nv-fs-caption);
  line-height: 1.55;
  color: var(--nv-text-primary);
  opacity: .98;
}

#toast-container > .toast-error {
  background-color: var(--nv-danger-soft) !important;
  color: var(--nv-danger-ink) !important;
}

#toast-container > .toast-success {
  background-color: var(--nv-success-soft) !important;
  color: var(--nv-success-ink) !important;
}

#toast-container > .toast-warning {
  background-color: var(--nv-warning-soft) !important;
  color: var(--nv-warning-ink) !important;
}

#toast-container > .toast-info {
  background-color: var(--nv-info-soft) !important;
  color: var(--nv-info-ink) !important;
}

#toast-container > div:hover {
  box-shadow: 0 22px 44px -26px rgba(0, 0, 0, .34),
              0 12px 28px -20px rgba(0, 0, 0, .28) !important;
}

#toast-container > div .toast-close-button {
  color: currentColor;
  opacity: .45;
  font-size: 18px;
  text-shadow: none;
}

#toast-container > div .toast-close-button:hover {
  opacity: .85;
}

@media (max-width: 640px) {
  #toast-container.toast-top-right {
    top: auto;
    right: 12px;
    left: 12px;
    bottom: 80px;
  }

  #toast-container > div {
    min-width: 0;
    max-width: none;
  }
}

.nv-req {
  font-style: normal;
  color: var(--nv-danger-ink);
}

.nv-hint {
  margin-top: 6px;
  font-size: var(--nv-fs-micro);
  color: var(--nv-text-faint);
}

.nv-hint__link {
  color: var(--nv-brand-ink);
  font-weight: var(--nv-weight-medium);
  text-decoration: none;
  transition: color var(--nv-dur-fast) var(--nv-ease-out);
}

.nv-hint__link:hover,
.nv-hint__link:focus-visible {
  color: var(--nv-brand);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.nv-pair {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--nv-space-3);
  align-items: start;
}

.nv-pair > .nv-block {
  margin-bottom: 0;
}

@media (max-width: 560px) {
  .nv-pair {
    grid-template-columns: minmax(0, 1fr);
  }

  .nv-pair > .nv-block {
    margin-bottom: var(--nv-space-4);
  }
}

@keyframes nv-shake {
  0%, 100% {
    transform: translateX(0);
  }

  18% {
    transform: translateX(-5px);
  }

  36% {
    transform: translateX(5px);
  }

  54% {
    transform: translateX(-3px);
  }

  72% {
    transform: translateX(3px);
  }

  88% {
    transform: translateX(-1px);
  }
}

.nv-shake {
  animation: nv-shake .42s var(--nv-ease-out);
}

@media (prefers-reduced-motion: reduce) {
  .nv-shake {
    animation: none;
  }
}

.nv-checkout-open #cw-bubble-holder,
body:has(.mcat-sheet:not([hidden])) #cw-bubble-holder {
  visibility: hidden !important;
  pointer-events: none !important;
}

.nv-card {
  overflow: hidden;
}

.nv-btn:focus-visible,
:root[data-theme] .uc-cta:focus-visible,
:root[data-theme] .uc-quick:focus-visible {
  outline: 2px solid var(--nv-brand);
  outline-offset: 2px;
}

.nv-btn.is-loading,
.nv-btn[aria-busy="true"] {
  cursor: progress;
  opacity: .7;
  pointer-events: none;
}

.nv-input[readonly],
:root[data-theme] .mb-page :is(.layui-input, .form-control, .layui-textarea)[readonly],
:root[data-theme] .mb-page .uc-card .form-body :is(.layui-input, .form-control, .layui-textarea, .layui-select, select)[readonly] {
  background-color: var(--nv-soft);
}

.nv-pager__num,
.nv-pager__btn,
.q-pager__num,
.q-pager__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--nv-control-sm-height);
  min-height: var(--nv-control-sm-height);
  padding: 0 var(--nv-space-2);
  border: 1px solid transparent;
  border-radius: var(--nv-radius-btn);
  background: transparent;
  color: var(--nv-text-secondary);
  font-size: var(--nv-fs-caption);
  cursor: pointer;
}

.nv-pager__num:hover,
.nv-pager__btn:hover:not(.is-disabled),
.q-pager__num:hover,
.q-pager__btn:hover:not(.is-disabled) {
  background: var(--nv-brand-softer);
  color: var(--nv-brand-ink);
}

.nv-pager__num.is-on,
.q-pager__num.is-on {
  background: var(--nv-brand-solid);
  color: var(--nv-text-on-solid);
  box-shadow: none;
}

.nv-pager__btn.is-disabled,
.q-pager__btn.is-disabled {
  opacity: .4;
  pointer-events: none;
  cursor: default;
}

.nv-control,
:root[data-theme] .mb-page .uc-card .form-body {
  border: var(--nv-control-border);
  border-radius: var(--nv-radius-btn);
  background-color: var(--nv-elevated);
}

.nv-control:focus-within,
:root[data-theme] .mb-page .uc-card .form-body:focus-within {
  border-color: var(--nv-brand);
  box-shadow: var(--nv-ring);
}

:root[data-theme] .mb-page .uc-card .form-body :is(.layui-input, .form-control, .layui-textarea, .layui-select, select) {
  /* 上游 _glass.css 对此组合输入框使用 !important；兼容层需同级覆盖。 */
  font-size: var(--nv-control-font-size) !important;
  height: auto;
  border: 0;
  background: transparent;
  box-shadow: none;
}

:root[data-theme] .mb-page .uc-card .form-body :is(.layui-input, .form-control, .layui-textarea, .layui-select, select):focus {
  box-shadow: none;
}

.nv-font-regular {
  font-weight: var(--nv-weight-regular);
}

.nv-action {
  cursor: pointer;
}

.nv-grow {
  flex: 1 1 auto;
  min-width: 0;
}

.nv-mb-0 {
  margin-bottom: 0;
}

.nv-link-strong {
  color: var(--nv-brand-ink);
  font-weight: var(--nv-weight-bold);
}

.nv-media-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: inherit;
  padding: var(--nv-space-5);
  color: var(--nv-text-muted);
  background: var(--nv-soft);
  font-size: var(--nv-fs-caption);
}

.nv-media-fallback[hidden] {
  display: none;
}

/* 商城与文章共用分页：容器、跳页和响应式布局与按钮一起维护。 */
.nv-pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--nv-space-3);
  margin-top: var(--nv-space-6);
  padding-top: var(--nv-space-5);
  border-top: 1px solid var(--nv-border-soft);
}

.nv-pager__total {
  font-size: var(--nv-fs-caption);
  color: var(--nv-text-muted);
}

.nv-pager__total b {
  font-family: var(--nv-mono);
  font-variant-numeric: tabular-nums;
  color: var(--nv-text-secondary);
  font-weight: var(--nv-weight-medium);
}

.nv-pager__list {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  padding: 5px;
  border: 1px solid var(--nv-border-soft);
  border-radius: var(--nv-radius-lg);
  background-color: var(--nv-elevated);
}

.nv-pager__gap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 34px;
  color: var(--nv-text-faint);
  user-select: none;
}

@media (max-width: 640px) {
  .nv-pager {
    flex-direction: column;
    align-items: stretch;
    gap: var(--nv-space-3);
  }

  .nv-pager__list {
    justify-content: center;
  }

  .nv-pager__num, .nv-pager__gap {
    display: none;
  }

  .nv-pager__num.is-on {
    display: inline-flex;
  }

  .nv-pager__btn {
    flex: 1;
    max-width: 140px;
  }
}

.nv-pager__jump {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nv-pager__sep {
  align-self: stretch;
  width: 1px;
  margin: 2px 4px;
  background-color: var(--nv-border-soft);
}

.nv-pager__jump-label,
.nv-pager__jump-unit {
  font-size: var(--nv-fs-caption);
  color: var(--nv-text-muted);
  white-space: nowrap;
}

.nv-pager__jump-label {
  padding-left: 4px;
}

.nv-pager__jump-unit {
  padding-right: 2px;
}

.nv-pager__jump-input {
  width: 48px;
  height: 34px;
  padding: 0 6px;
  border: 1px solid transparent;
  border-radius: var(--nv-radius-md);
  background-color: var(--nv-soft);
  font-family: var(--nv-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--nv-fs-caption);
  color: var(--nv-text-secondary);
  text-align: center;
  outline: none;
  transition: border-color var(--nv-dur-fast) var(--nv-ease-out),
              background-color var(--nv-dur-fast) var(--nv-ease-out);
  -moz-appearance: textfield;
  appearance: textfield;
}

.nv-pager__jump-input::-webkit-outer-spin-button,
.nv-pager__jump-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.nv-pager__jump-input:focus {
  border-color: var(--nv-border-brand);
  background-color: var(--nv-elevated);
}

.nv-pager__jump-btn {
  height: 34px;
  padding: 0 12px;
  border: none;
  border-radius: var(--nv-radius-md);
  background-color: var(--nv-brand-solid);
  color: var(--nv-text-on-solid);
  font-size: var(--nv-fs-caption);
  font-weight: var(--nv-weight-medium);
  cursor: pointer;
  transition: background-color var(--nv-dur-fast) var(--nv-ease-out);
}

.nv-pager__jump-btn:hover {
  background-color: var(--nv-brand-hover);
}

.nv-page-size {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--nv-text-muted);
  font-size: var(--nv-fs-caption);
  white-space: nowrap;
}

.nv-page-size__select {
  min-width: 66px;
  height: 34px;
  padding: 0 8px;
  border: 1px solid var(--nv-border-soft);
  border-radius: var(--nv-radius-md);
  background: var(--nv-elevated);
  color: var(--nv-text-secondary);
  font: inherit;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
}

.nv-page-size__select:focus-visible {
  outline: 2px solid var(--nv-brand);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .nv-pager__list {
    justify-content: center;
    padding: 4px;
    gap: 2px;
  }

  .nv-pager__btn {
    flex: 0 1 auto;
    max-width: none;
    padding-inline: 10px;
  }

  .nv-pager__sep {
    margin: 2px 3px;
  }

  .nv-pager__jump {
    gap: 4px;
  }

  .nv-pager__jump-label {
    padding-left: 2px;
  }

  .nv-pager__jump-input {
    width: 40px;
    flex: 0 0 40px;
  }

  .nv-pager__jump-btn {
    padding: 0 9px;
  }
}