.page-faq {
  --faq-rule: 1px solid var(--mist);
  --faq-dark-line: rgba(251, 252, 251, 0.16);
  --faq-sticky: 96px;
  background: var(--paper);
  color: var(--body-text);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq .container {
  width: 100%;
  max-width: var(--w-page);
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* 面包屑 */
.page-faq .faq-crumb {
  padding-block: clamp(14px, 2.2vw, 22px);
  border-bottom: var(--faq-rule);
}
.page-faq .faq-crumb--foot {
  border-bottom: 0;
  border-top: var(--faq-rule);
  margin-top: clamp(32px, 5vw, 56px);
}
.page-faq .faq-crumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--steel);
}
.page-faq .faq-crumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.page-faq .faq-crumb__item + .faq-crumb__item::before {
  content: "›";
  color: var(--mist);
}
.page-faq .faq-crumb__link {
  color: var(--teal);
  text-decoration: none;
}
.page-faq .faq-crumb__link:hover,
.page-faq .faq-crumb__link:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-crumb__current {
  color: var(--cyan);
}

/* 首屏 */
.page-faq .faq-hero {
  padding-block: clamp(28px, 4.5vw, 60px) clamp(32px, 5vw, 68px);
}
.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}
.page-faq .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold-deep);
}
.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 54px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 44ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--body-text);
}
.page-faq .faq-hero__sub {
  margin: 12px 0 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--steel);
}
.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-faq .faq-hero__visual {
  display: flex;
  flex-direction: column;
  border: var(--faq-rule);
  background: linear-gradient(155deg, rgba(14, 59, 74, 0.06), rgba(241, 238, 228, 0.5));
}
.page-faq .faq-hero__band {
  display: block;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--cyan) 0 25%,
    var(--gold) 25% 50%,
    var(--ochre) 50% 75%,
    var(--pine) 75% 100%
  );
}
.page-faq .faq-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* 章节头 */
.page-faq .faq-sec {
  padding-block: clamp(30px, 4.5vw, 56px);
}
.page-faq .faq-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  padding-top: 18px;
  border-top: 2px solid var(--cyan);
  margin-bottom: clamp(22px, 3vw, 34px);
}
.page-faq .faq-head__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--steel);
}
.page-faq .faq-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.page-faq .faq-head__note {
  margin: 0;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--steel);
}

/* 分类卡片 */
.page-faq .cat-grid {
  display: grid;
  gap: 1px;
  background: var(--mist);
  border: var(--faq-rule);
}
.page-faq .cat {
  position: relative;
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 22px 20px 24px;
  background: var(--paper);
  text-decoration: none;
  color: inherit;
  transition: background 200ms var(--ease);
}
.page-faq .cat::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 240ms var(--ease);
}
.page-faq .cat--teal::after { background: var(--teal); }
.page-faq .cat--gold::after { background: var(--gold); }
.page-faq .cat--pine::after { background: var(--pine); }
.page-faq .cat:hover,
.page-faq .cat:focus-visible {
  background: var(--sand);
}
.page-faq .cat:hover::after,
.page-faq .cat:focus-visible::after {
  transform: scaleY(1);
}
.page-faq .cat__count {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--steel);
}
.page-faq .cat__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}
.page-faq .cat__text {
  font-size: 16px;
  line-height: 1.75;
  color: var(--steel);
}

/* 注册三步 */
.page-faq .register {
  position: relative;
  margin-block: clamp(30px, 4.5vw, 56px);
  padding-block: clamp(34px, 5vw, 68px);
  background-color: var(--cyan);
  background-image:
    linear-gradient(rgba(251, 252, 251, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(251, 252, 251, 0.05) 1px, transparent 1px);
  background-size: var(--grid-cell) var(--grid-cell);
  color: var(--paper);
  scroll-margin-top: var(--faq-sticky);
}
.page-faq .faq-head--invert {
  border-top-color: var(--gold);
}
.page-faq .faq-head--invert .faq-head__title {
  color: var(--paper);
}
.page-faq .faq-head--invert .faq-head__num,
.page-faq .faq-head--invert .faq-head__note {
  color: rgba(251, 252, 251, 0.72);
}
.page-faq .register__lead {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(251, 252, 251, 0.86);
}
.page-faq .steps {
  display: grid;
  gap: 1px;
  background: var(--faq-dark-line);
  border: var(--faq-dark-line);
}
.page-faq .step {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--cyan);
}
.page-faq .step__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--gold);
}
.page-faq .step__title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--paper);
}
.page-faq .step__row {
  display: grid;
  gap: 4px;
  margin: 0;
  padding-top: 10px;
  border-top: var(--faq-dark-line);
}
.page-faq .step__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(251, 252, 251, 0.62);
}
.page-faq .step__val {
  font-size: 16px;
  line-height: 1.7;
  color: rgba(251, 252, 251, 0.94);
}
.page-faq .step__fix {
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  font-size: 16px;
  line-height: 1.7;
  color: var(--paper);
}
.page-faq .register__tail {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding-top: 16px;
  border-top: var(--faq-dark-line);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(251, 252, 251, 0.78);
}

/* 问答区 */
.page-faq .qa-zone {
  padding-block: clamp(30px, 4.5vw, 56px);
}
.page-faq .qa-layout {
  display: grid;
  gap: clamp(22px, 3vw, 44px);
}
.page-faq .qa-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--steel);
}
.page-faq .qa-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-faq .qa-index__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: var(--faq-rule);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  white-space: nowrap;
  color: var(--steel);
  text-decoration: none;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}
.page-faq .qa-index__link:hover,
.page-faq .qa-index__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}
.page-faq .qa-index__count {
  font-size: 11px;
  color: var(--gold-deep);
}

.page-faq .qa-group {
  scroll-margin-top: var(--faq-sticky);
}
.page-faq .qa-group + .qa-group {
  margin-top: clamp(32px, 4vw, 52px);
}
.page-faq .qa-group__title {
  margin: 0 0 6px;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.page-faq .qa-group__note {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--steel);
}

.page-faq .qa {
  border-bottom: var(--faq-rule);
}
.page-faq .qa__summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 0 17px 16px;
  border-left: 3px solid transparent;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}
.page-faq .qa__summary::-webkit-details-marker {
  display: none;
}
.page-faq .qa__summary::marker {
  content: "";
}
.page-faq .qa__summary:hover {
  color: var(--teal);
}
.page-faq .qa[open] > .qa__summary {
  border-left-color: var(--gold);
}
.page-faq .qa__sign {
  position: relative;
  flex: 0 0 12px;
  width: 12px;
  height: 12px;
  margin-top: 7px;
}
.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--steel);
  transition: transform 200ms var(--ease), opacity 200ms var(--ease);
}
.page-faq .qa__sign::before {
  top: 5px;
  left: 0;
  width: 12px;
  height: 1.5px;
}
.page-faq .qa__sign::after {
  top: 0;
  left: 5px;
  width: 1.5px;
  height: 12px;
}
.page-faq .qa[open] .qa__sign::after {
  transform: scaleY(0);
  opacity: 0;
}
.page-faq .qa[open] .qa__sign::before {
  background: var(--gold-deep);
}
.page-faq .qa__body {
  padding: 0 0 20px 33px;
  max-width: 64ch;
}
.page-faq .qa__body p {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--body-text);
}
.page-faq .qa__body p:last-child {
  margin-bottom: 0;
}

/* 配图 */
.page-faq .qa-figure {
  margin: 0 0 clamp(20px, 3vw, 28px);
  border: var(--faq-rule);
  background: var(--sand);
}
.page-faq .qa-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-faq .qa-figure figcaption {
  padding: 12px 16px;
  border-top: var(--faq-rule);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.7;
  color: var(--steel);
}

/* 提示条 */
.page-faq .notice {
  margin-block: clamp(30px, 4vw, 46px);
  padding: clamp(20px, 3vw, 30px);
  background: var(--sand);
  border: var(--faq-rule);
}
.page-faq .notice__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold-deep);
}
.page-faq .notice__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 16px;
  padding: 0;
  list-style: none;
}
.page-faq .notice__list li {
  padding: 6px 12px;
  border: var(--faq-rule);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}
.page-faq .notice__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--body-text);
}

/* 联系区 */
.page-faq .faq-ask {
  padding-block: clamp(34px, 5vw, 60px);
  background: var(--sand-soft);
  border-top: var(--faq-rule);
  border-bottom: var(--faq-rule);
  scroll-margin-top: var(--faq-sticky);
}
.page-faq .ask-grid {
  display: grid;
  gap: 1px;
  background: var(--mist);
  border: var(--faq-rule);
}
.page-faq .ask-card {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: clamp(20px, 3vw, 28px);
  background: var(--paper);
}
.page-faq .ask-card__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--steel);
}
.page-faq .ask-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.02em;
  word-break: break-word;
  color: var(--cyan);
}
.page-faq .ask-card__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--body-text);
}
.page-faq .ask-alt {
  margin: clamp(18px, 3vw, 26px) 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--steel);
}
.page-faq .ask-alt__link {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}
.page-faq .ask-alt__link:hover,
.page-faq .ask-alt__link:focus-visible {
  color: var(--cyan);
}

/* 焦点态 */
.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* 响应式 */
@media (min-width: 640px) {
  .page-faq .ask-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 720px) {
  .page-faq .cat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 860px) {
  .page-faq .steps {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-faq .faq-head__note {
    margin-left: auto;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-faq .qa-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .qa-index {
    position: sticky;
    top: var(--faq-sticky);
  }
  .page-faq .qa-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--mist);
  }
  .page-faq .qa-index__link {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 12px 0 12px 16px;
    white-space: normal;
    background: transparent;
  }
  .page-faq .qa-index__link:hover,
  .page-faq .qa-index__link:focus-visible {
    border-left-color: var(--gold);
    background: transparent;
  }
  .page-faq .qa-index__count {
    margin-left: auto;
  }
}

@media (min-width: 1080px) {
  .page-faq .cat-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  .page-faq .cat::after {
    transform: scaleY(1);
    opacity: 0;
  }
}
</main>