/* idcub · 关于、推广、2FA工具页面布局。
   组件与依赖说明：../docs/CSS-ARCHITECTURE.md。 */

.aff {
  background: var(--nv-page);
  padding-bottom: var(--nv-space-8, 48px);
}

.aff-hero {
  padding: 56px 24px 40px;
  text-align: center;
  background: var(--nv-soft);
  border-radius: var(--nv-radius-lg, 20px);
  margin-bottom: 24px;
}

.aff-hero__title {
  margin: 0 0 12px;
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--nv-text-primary);
}

.aff-hero__sub {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--nv-text-muted);
}

.aff-wrap {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.aff > .aff-card,
.aff > .aff-cta {
  margin-top: 24px;
}

.aff-card {
  padding: 32px 36px;
}

.aff-card__title {
  position: relative;
  margin: 0 0 24px;
  padding-left: 16px;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--nv-text-primary);
}

.aff-card__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 26px;
  border-radius: 3px;
  background: var(--nv-brand-solid);
}

.aff-card__desc {
  margin: -12px 0 24px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--nv-text-muted);
}

.aff-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

@media (max-width: 900px) {
  .aff-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .aff-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.aff-feat {
  padding: 26px 22px 24px;
  border: 1px solid var(--nv-border-soft);
  border-radius: 14px;
  background: var(--nv-soft);
  text-align: center;
  transition: border-color .18s ease, background-color .18s ease, transform .18s ease;
}

.aff-feat:hover {
  border-color: var(--nv-border);
  background: var(--nv-elevated);
  transform: translateY(-2px);
}

.aff-feat__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-bottom: 14px;
  border-radius: 50%;
  background: var(--nv-brand-softer);
  color: var(--nv-brand-solid);
}

.aff-feat__icon .material-icons-outlined {
  font-size: 22px;
}

.aff-feat__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--nv-text-primary);
}

.aff-feat__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--nv-text-muted);
}

.aff-rates {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

@media (max-width: 600px) {
  .aff-rates {
    grid-template-columns: minmax(0, 1fr);
  }
}

.aff-rate {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 24px 16px;
  border-radius: 14px;
  background: var(--nv-soft);
  border: 1px solid var(--nv-border-soft);
}

.aff-rate__lv {
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--nv-brand-soft);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--nv-brand-solid);
}

.aff-rate__num {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.03em;
  color: var(--nv-brand-ink);
}

.aff-rate__num > i {
  font-style: normal;
  font-size: 17px;
  font-weight: 700;
  margin-left: 1px;
  color: var(--nv-brand);
}

.aff-rate__desc {
  font-size: 12.5px;
  color: var(--nv-text-muted);
}

.aff-rates__note {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 20px 0 0;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--nv-soft);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--nv-text-muted);
}

.aff-rates__note .material-icons-outlined {
  font-size: 16px;
  color: var(--nv-text-faint);
  flex: 0 0 auto;
}

.aff-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

@media (max-width: 600px) {
  .aff-stats {
    grid-template-columns: minmax(0, 1fr);
  }
}

.aff-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 22px 16px;
  border-radius: 14px;
  background: var(--nv-soft);
  border: 1px solid var(--nv-border-soft);
}

.aff-stat__num {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--nv-brand-ink);
  letter-spacing: -.02em;
}

.aff-stat__label {
  font-size: 12.5px;
  color: var(--nv-text-muted);
}

.aff-cta {
  padding: 44px 36px;
  border-radius: 20px;
  background: var(--nv-elevated);
  box-shadow: var(--nv-shadow-1);
  text-align: center;
}

.aff-cta__title {
  margin: 0 0 12px;
  font-size: clamp(22px, 2.6vw, 28px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--nv-text-primary);
}

.aff-cta__text {
  max-width: 520px;
  margin: 0 auto 26px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--nv-text-muted);
}

.about-prose {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--nv-text-secondary);
}

.about-prose p {
  margin: 0 0 1em;
}

.about-prose p:last-child {
  margin-bottom: 0;
}

.about-prose :where(h2, h3, h4) {
  margin: 1.4em 0 .6em;
  color: var(--nv-text-primary);
  font-weight: var(--nv-weight-bold);
  line-height: 1.4;
}

.about-prose :where(h2) {
  font-size: 18px;
}

.about-prose :where(h3) {
  font-size: 16px;
}

.about-prose :where(ul, ol) {
  margin: 0 0 1em;
  padding-left: 1.4em;
}

.about-prose li {
  margin-bottom: .4em;
}

.about-prose a {
  color: var(--nv-brand-ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.about-prose :where(strong, b) {
  color: var(--nv-text-primary);
  font-weight: var(--nv-weight-medium);
}

.about-prose :where(img) {
  max-width: 100%;
  height: auto;
  border-radius: var(--nv-radius-md);
}

.about-prose :where(blockquote) {
  margin: 1em 0;
  padding: 10px 16px;
  border-left: 3px solid var(--nv-border-brand);
  background: var(--nv-brand-softer);
  border-radius: 0 var(--nv-radius-md) var(--nv-radius-md) 0;
  color: var(--nv-text-secondary);
}

.about-prose :where(code) {
  padding: 2px 6px;
  border-radius: 5px;
  background: var(--nv-soft);
  font-family: var(--nv-mono);
  font-size: .92em;
}

.about-promises.aff-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.about-stats.aff-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.about-contacts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 4px;
}

.about-contact {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--nv-border-soft);
  border-radius: var(--nv-radius-md);
  background: var(--nv-soft);
  color: var(--nv-text-primary);
  font-size: 14px;
  transition: border-color .18s ease, background-color .18s ease, transform .18s ease;
}

.about-contact:hover {
  border-color: var(--nv-border-brand);
  background: var(--nv-brand-softer);
  transform: translateY(-1px);
}

.about-contact__ico {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--nv-radius-chip, 10px);
  background: var(--nv-brand-soft);
  color: var(--nv-brand-ink);
}

.about-contact__ico .material-icons-outlined {
  font-size: 18px;
}

.about-contact__name {
  flex: 1;
  min-width: 0;
  font-weight: var(--nv-weight-medium);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.about-contact__arrow {
  flex: 0 0 auto;
  font-size: 16px;
  color: var(--nv-text-faint);
  transition: transform .18s ease, color .18s ease;
}

.about-contact:hover .about-contact__arrow {
  color: var(--nv-brand-ink);
  transform: translateX(2px);
}

.aff-feat__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
  font-size: 13px;
  font-weight: var(--nv-weight-medium);
  color: var(--nv-brand-ink);
}

.aff-feat__link .material-icons-outlined {
  font-size: 15px;
}

.aff-feat__link:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

@media (max-width: 900px) {
  .about-stats.aff-stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .about-promises.aff-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 720px) {
  .about-contacts {
    grid-template-columns: 1fr;
  }

  .about-prose {
    font-size: 14px;
  }
}

@media (max-width: 640px) {
  .aff-hero {
    padding: 40px 20px 28px;
  }

  .aff-card {
    padding: 24px 20px;
    border-radius: 16px;
  }

  .aff-card__title {
    font-size: 20px;
  }

  .aff-cta {
    padding: 32px 20px;
    border-radius: 16px;
  }

  .aff-btn {
    width: 100%;
  }
}

.tf-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 24px;
}

@media (max-width: 900px) {
  .tf-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.tf-label {
  display: block;
  margin-bottom: 10px;
  font-size: 14px;
  font-weight: var(--nv-weight-medium);
  color: var(--nv-text-primary);
}

.tf-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tf-input {
  flex: 1 1 240px;
  min-width: 0;
  font-family: var(--nv-mono);
  letter-spacing: .04em;
}

.tf-hint {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--nv-text-muted);
}

.tf-chips {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tf-chips__label {
  font-size: 13px;
  color: var(--nv-text-faint);
}

.tf-chip {
  padding: 6px 12px;
  border: 1px solid var(--nv-border-soft);
  border-radius: var(--nv-radius-pill);
  background: var(--nv-soft);
  color: var(--nv-text-secondary);
  font-family: var(--nv-mono);
  font-size: 12.5px;
  cursor: pointer;
  transition: border-color var(--nv-dur-fast) var(--nv-ease-out),
              background-color var(--nv-dur-fast) var(--nv-ease-out),
              color var(--nv-dur-fast) var(--nv-ease-out);
}

.tf-chip:hover {
  border-color: var(--nv-border-brand);
  background: var(--nv-brand-softer);
  color: var(--nv-brand-ink);
}

.tf-panel--code {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.tf-codebox {
  position: relative;
  width: 220px;
  height: 220px;
  display: grid;
  place-items: center;
}

.tf-ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.tf-ring__track {
  fill: none;
  stroke: var(--nv-border-soft);
  stroke-width: 6;
}

.tf-ring__bar {
  fill: none;
  stroke: var(--nv-brand);
  stroke-width: 6;
  stroke-linecap: round;
  transition: stroke-dashoffset .3s linear,
              stroke var(--nv-dur-fast) var(--nv-ease-out);
}

.tf-codebox[data-urgent="1"] .tf-ring__bar {
  stroke: var(--nv-warning);
}

.tf-code {
  position: relative;
  z-index: 1;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  font-family: var(--nv-mono);
  font-size: 34px;
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1;
  color: var(--nv-text-primary);
}

.tf-code.is-flash {
  animation: tf-flash .45s var(--nv-ease-out);
}

@keyframes tf-flash {
  0% {
    transform: scale(.94);
    opacity: .55;
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.tf-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  margin-top: 18px;
  font-size: 13.5px;
  color: var(--nv-text-muted);
}

.tf-status[data-state="run"] {
  color: var(--nv-success-ink);
}

.tf-status[data-state="err"] {
  color: var(--nv-warning-ink);
}

.tf-remain b {
  font-family: var(--nv-mono);
  font-size: 15px;
  color: var(--nv-text-primary);
}

.tf-copy {
  display: flex;
  gap: 10px;
  width: 100%;
  margin-top: 14px;
}

.tf-copy .tf-input {
  flex: 1 1 auto;
  height: 42px;
  font-size: 16px;
  letter-spacing: .22em;
  text-align: center;
}

.tf-copy .tf-btn {
  height: 42px;
}

.tf-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.tf-step {
  display: flex;
  gap: 14px;
}

.tf-step__num {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--nv-brand-solid);
  color: var(--nv-text-on-solid, #fff);
  font-size: 15px;
  font-weight: var(--nv-weight-bold);
}

.tf-step__title {
  margin: 0 0 4px;
  font-size: 15.5px;
  font-weight: var(--nv-weight-medium);
  color: var(--nv-text-primary);
}

.tf-step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--nv-text-muted);
}

.tf-notes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.tf-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--nv-border-soft);
  border-radius: var(--nv-radius-md);
  background: var(--nv-soft);
}

.tf-note .material-icons-outlined {
  flex: 0 0 auto;
  margin-top: 1px;
  font-size: 20px;
  color: var(--nv-brand-ink);
}

.tf-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--nv-text-secondary);
}

.tf-toast {
  position: fixed;
  left: 50%;
  bottom: 48px;
  z-index: var(--nv-z-toast, 500);
  max-width: calc(100vw - 48px);
  padding: 10px 18px;
  border-radius: var(--nv-radius-pill);
  background: var(--nv-text-primary);
  color: var(--nv-page);
  font-size: 13.5px;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px);
  transition: opacity .25s var(--nv-ease-out), transform .25s var(--nv-ease-out);
}

.tf-toast.is-show {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 640px) {
  .tf-row .tf-btn {
    flex: 1 1 auto;
  }

  .tf-codebox {
    width: 190px;
    height: 190px;
  }

  .tf-code {
    font-size: 28px;
  }

  .tf-meta {
    flex-direction: column;
    gap: 4px;
  }
}