.page-faq {
  --faq-gap: clamp(20px, 3vw, 40px);
  --faq-radius: 2px;
  color: var(--paper);
}

.page-faq .container {
  width: 100%;
}

.page-faq .breadcrumbs {
  padding-top: clamp(14px, 3vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 6vw, 62px) 0 clamp(28px, 5vw, 54px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 95% at 84% 0%, rgba(53, 240, 208, 0.15), transparent 62%),
    radial-gradient(95% 85% at 4% 24%, rgba(27, 42, 107, 0.85), transparent 70%);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: var(--faq-gap);
  align-items: end;
}

.page-faq .faq-hero__label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq h1 {
  margin: 0 0 18px;
  max-width: 24ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 52px);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lead .lede {
  max-width: 54ch;
  color: var(--paper-2);
}

.page-faq .faq-hero__side {
  display: grid;
  gap: 10px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--line-strong);
  border-radius: var(--faq-radius);
  background: rgba(21, 28, 61, 0.7);
}

.page-faq .faq-hero__side .meta-line {
  margin: 0;
  color: var(--mist);
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  padding: clamp(38px, 7vw, 84px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-section:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-section .section-head {
  margin-bottom: clamp(22px, 4vw, 38px);
}

.page-faq .prose {
  color: var(--paper-2);
}

.page-faq .prose p {
  margin: 0 0 1em;
  line-height: 1.75;
}

.page-faq .prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 面板入口 ---------- */
.page-faq .faq-entry {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-entry > *,
.page-faq .faq-group > *,
.page-faq .faq-narrow > * {
  min-width: 0;
}

.page-faq .faq-entry__media {
  margin: 0;
}

.page-faq .faq-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 24px 0 20px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-steps > li {
  counter-increment: faqstep;
  position: relative;
  padding: 15px 16px 15px 58px;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: linear-gradient(180deg, rgba(21, 28, 61, 0.85), rgba(11, 16, 48, 0.6));
  color: var(--paper-2);
  line-height: 1.7;
}

.page-faq .faq-steps > li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 分组问答 ---------- */
.page-faq .faq-tabs {
  margin-top: 4px;
}

.page-faq .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .tabs__tab {
  padding: 9px 18px;
  font: inherit;
  font-size: var(--step--1);
  letter-spacing: 0.1em;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.page-faq .tabs__tab:hover {
  color: var(--paper);
  border-color: var(--line-strong);
}

.page-faq .tabs__tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .tabs__tab:focus-visible {
  outline: 2px solid var(--warm);
  outline-offset: 2px;
}

.page-faq .tabs__panel {
  padding-top: 2px;
}

.page-faq .faq-group {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 10px;
  align-items: start;
  padding: 10px 12px;
  font-size: var(--step--1);
  line-height: 1.55;
  color: var(--paper-2);
  text-decoration: none;
  border-left: 1px solid var(--line);
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-index__link::before {
  content: "";
  width: 7px;
  height: 7px;
  margin-top: 7px;
  border-radius: 50%;
  border: 1px solid var(--mist);
  background: transparent;
  transition: background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  border-color: var(--line-strong);
  background: rgba(53, 240, 208, 0.07);
}

.page-faq .faq-index__link:hover::before,
.page-faq .faq-index__link:focus-visible::before {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-index__link.is-active {
  color: var(--paper);
  border-color: var(--cyan);
}

.page-faq .faq-index__link.is-active::before {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 240, 208, 0.16);
}

.page-faq .faq-answers {
  display: grid;
  gap: 16px;
}

.page-faq .faq-item {
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: linear-gradient(180deg, rgba(21, 28, 61, 0.88), rgba(11, 16, 48, 0.62));
  scroll-margin-top: 110px;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-faq .faq-item:hover {
  border-color: var(--line-strong);
}

.page-faq .faq-item:target {
  border-color: var(--cyan);
}

.page-faq .faq-item__q {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
}

.page-faq .faq-item p {
  margin: 0;
  color: var(--paper-2);
  line-height: 1.75;
}

.page-faq .faq-item a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 格式对照 ---------- */
.page-faq .faq-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: rgba(21, 28, 61, 0.6);
}

.page-faq .format-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
}

.page-faq .format-table th,
.page-faq .format-table td {
  padding: 15px 18px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.page-faq .format-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(11, 16, 48, 0.6);
}

.page-faq .format-table tbody th {
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: 0.08em;
  color: var(--paper);
  white-space: nowrap;
}

.page-faq .format-table tbody td {
  font-size: var(--step--1);
  line-height: 1.7;
  color: var(--paper-2);
}

.page-faq .format-table tbody tr:last-child th,
.page-faq .format-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .format-table tbody tr:hover {
  background: rgba(53, 240, 208, 0.05);
}

.page-faq .faq-format__media {
  margin: clamp(24px, 4vw, 38px) 0 0;
}

.page-faq .faq-details {
  display: grid;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-faq .faq-detail {
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: rgba(21, 28, 61, 0.55);
}

.page-faq .faq-detail > summary {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 15px 0;
  list-style: none;
  cursor: pointer;
  font-size: var(--step-0);
  color: var(--paper);
}

.page-faq .faq-detail > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-detail > summary::before {
  content: "+";
  font-family: var(--font-mono);
  color: var(--cyan);
}

.page-faq .faq-detail[open] > summary::before {
  content: "–";
}

.page-faq .faq-detail > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-detail__body {
  padding: 0 0 16px 26px;
}

.page-faq .faq-detail__body p {
  margin: 0;
  font-size: var(--step--1);
  line-height: 1.75;
  color: var(--paper-2);
}

.page-faq .faq-detail__body a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 数据 ---------- */
.page-faq .faq-stats {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-faq .faq-stats .stat {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--line-strong);
  border-radius: var(--faq-radius);
  background: rgba(21, 28, 61, 0.66);
}

.page-faq .faq-stats .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(23px, 4vw, 31px);
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-faq .faq-stats .stat__label {
  display: block;
  margin-top: 9px;
  font-size: var(--step--1);
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .faq-correct {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(26px, 4vw, 42px);
  align-items: start;
}

/* ---------- 旁注纸张 ---------- */
.page-faq .sidenote {
  padding: 18px 20px;
  border: 1px solid var(--paper-2);
  border-radius: var(--faq-radius);
  background: var(--paper);
  color: var(--ink);
  box-shadow: 7px 7px 0 rgba(217, 210, 190, 0.16);
}

.page-faq .sidenote__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sign);
}

.page-faq .sidenote p {
  margin: 0;
  font-size: var(--step--1);
  line-height: 1.75;
}

/* ---------- 通知窄栏 ---------- */
.page-faq .faq-narrow {
  display: grid;
  gap: var(--faq-gap);
  max-width: 940px;
  align-items: start;
}

/* ---------- 帮助 ---------- */
.page-faq .faq-help {
  padding: clamp(28px, 5vw, 52px);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background:
    radial-gradient(120% 130% at 92% 8%, rgba(53, 240, 208, 0.16), transparent 58%),
    linear-gradient(135deg, rgba(27, 42, 107, 0.92), rgba(11, 16, 48, 0.96) 58%, rgba(14, 107, 98, 0.5));
}

.page-faq .faq-help__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .faq-help h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.25;
  color: var(--paper);
}

.page-faq .faq-help p {
  margin: 0;
  max-width: 62ch;
  color: var(--paper-2);
  line-height: 1.75;
}

.page-faq .faq-help .mono {
  color: var(--warm);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-entry {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: start;
  }

  .page-faq .faq-group {
    grid-template-columns: minmax(200px, 260px) minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-correct {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
  }

  .page-faq .faq-narrow {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .page-faq .tabs__tab {
    padding: 8px 14px;
    letter-spacing: 0.06em;
  }

  .page-faq .faq-hero__side {
    padding: 16px;
  }

  .page-faq .faq-detail__body {
    padding-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}