.page-faq {
  --faq-ink-soft: rgba(27, 18, 12, 0.74);
  --faq-rule: rgba(27, 18, 12, 0.18);
  --faq-amber-ink: #8A5200;
  --faq-focus-ink: #7A260F;
}

.page-faq .shell {
  padding-block: 20px 72px;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--gray);
}

.page-faq .breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin: 0 8px;
  color: var(--line);
}

.page-faq .breadcrumb a {
  color: var(--gray);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--fg-2);
}

/* ---------- 页头 ---------- */
.page-faq .faq-head {
  position: relative;
  overflow: hidden;
  padding: 24px 18px 30px;
  background:
    linear-gradient(158deg, rgba(43, 227, 214, 0.09) 0%, rgba(7, 12, 22, 0) 46%),
    var(--panel);
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
}

.page-faq .faq-head::after {
  content: "";
  position: absolute;
  top: -50px;
  right: -70px;
  width: 230px;
  height: 230px;
  background: linear-gradient(135deg, rgba(255, 62, 143, 0.18), rgba(43, 227, 214, 0));
  clip-path: polygon(48% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-head::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--t1) 0 20%,
    var(--t2) 20% 40%,
    var(--t3) 40% 60%,
    var(--t4) 60% 80%,
    var(--t5) 80% 100%
  );
}

.page-faq .faq-head__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 22px;
}

.page-faq .faq-head__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-head h1 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 5.2vw, 2.7rem);
  line-height: 1.14;
  letter-spacing: 0.01em;
  color: var(--fg);
}

.page-faq .faq-head__lead {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.7;
  color: var(--fg-2);
}

.page-faq .faq-head__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-head__stats > div {
  min-width: 0;
  padding: 12px 10px 14px;
  background: var(--bg);
}

.page-faq .faq-head__stats dt {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gray);
}

.page-faq .faq-head__stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.2;
  color: var(--amber);
  word-break: break-word;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 28px;
  margin-top: 40px;
}

/* ---------- 目录 ---------- */
.page-faq .faq-index {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__list > li {
  flex: 0 0 auto;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 11px;
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--fg-2);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 0;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(43, 227, 214, 0.07);
}

.page-faq .faq-index__list a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
}

.page-faq .faq-index__label {
  flex: 1 1 auto;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray);
}

.page-faq .faq-index__note {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 分组 ---------- */
.page-faq .faq-stream {
  min-width: 0;
}

.page-faq .faq-group {
  margin-bottom: 52px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-group:last-child {
  margin-bottom: 0;
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 3.4vw, 1.5rem);
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--fg);
}

.page-faq .faq-group__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray);
}

.page-faq .faq-group__intro {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg-2);
}

/* ---------- 图片 ---------- */
.page-faq .faq-media {
  margin: 0 0 18px;
  padding: 8px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-faq .faq-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--bg);
}

.page-faq .faq-media figcaption {
  margin-top: 9px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-items {
  display: block;
}

.page-faq .faq-item {
  margin-bottom: 8px;
  background: var(--panel);
  border: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-item:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item:hover {
  border-color: rgba(43, 227, 214, 0.42);
}

.page-faq .faq-item[open] {
  border-color: rgba(43, 227, 214, 0.58);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--fg);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item > summary:hover {
  color: var(--cyan);
}

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

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  margin-top: 1px;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--cyan);
  border: 1px solid var(--line);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-mark {
  transform: rotate(45deg);
  border-color: var(--cyan);
}

.page-faq .faq-item__body {
  border-top: 1px solid var(--line);
}

/* ---------- 答案纸面 ---------- */
.page-faq .faq-answer {
  padding: 14px 16px 18px;
  background: var(--paper);
  color: var(--paper-ink);
  font-size: 16px;
  line-height: 1.7;
}

.page-faq .faq-answer p {
  margin: 0 0 10px;
}

.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-answer strong {
  font-weight: 700;
}

.page-faq .faq-answer a {
  color: var(--rust);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  color: var(--faq-focus-ink);
}

.page-faq .faq-answer a:focus-visible {
  outline: 2px solid var(--faq-focus-ink);
  outline-offset: 2px;
}

.page-faq .faq-answer__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px dashed var(--faq-rule);
}

.page-faq .faq-cycle {
  display: inline-flex;
  align-items: center;
  margin-left: auto;
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  white-space: nowrap;
  color: var(--gray);
  background: var(--bg);
  border: 1px solid var(--line);
}

.page-faq .faq-answer .copy-btn {
  margin: 0;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--rust);
  background: transparent;
  border: 1px solid rgba(201, 60, 27, 0.5);
  border-radius: 0;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-answer .copy-btn:hover {
  background: rgba(201, 60, 27, 0.12);
  border-color: var(--rust);
}

.page-faq .faq-answer .copy-btn:focus-visible {
  outline: 2px solid var(--faq-focus-ink);
  outline-offset: 2px;
}

.page-faq .faq-answer .copy-btn[data-copied] {
  color: var(--paper-ink);
  border-color: var(--paper-ink);
  background: rgba(27, 18, 12, 0.1);
}

/* ---------- 判定顺序 ---------- */
.page-faq .faq-steps {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
}

.page-faq .faq-steps > li {
  position: relative;
  counter-increment: faq-step;
  padding-left: 36px;
  margin-bottom: 10px;
  line-height: 1.7;
}

.page-faq .faq-steps > li:last-child {
  margin-bottom: 0;
}

.page-faq .faq-steps > li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.14em;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--faq-amber-ink);
}

/* ---------- 纸面表格 ---------- */
.page-faq .faq-reserve-wrap {
  margin: 12px 0 4px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-reserve {
  width: 100%;
  min-width: 300px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .faq-reserve caption {
  padding-bottom: 8px;
  text-align: left;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--faq-ink-soft);
}

.page-faq .faq-reserve th,
.page-faq .faq-reserve td {
  padding: 8px 10px;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-reserve thead th {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faq-ink-soft);
  border-bottom: 1px solid rgba(27, 18, 12, 0.42);
}

.page-faq .faq-reserve tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .faq-reserve .num {
  font-family: var(--font-mono);
  font-size: 13px;
  white-space: nowrap;
}

.page-faq .faq-tier {
  display: inline-block;
  min-width: 26px;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
  color: #0A0F18;
}

.page-faq .faq-tier--1 {
  background: var(--t1);
}

.page-faq .faq-tier--2 {
  background: var(--t2);
}

.page-faq .faq-tier--3 {
  background: var(--t3);
}

.page-faq .faq-tier--4 {
  background: var(--t4);
  color: #150610;
}

.page-faq .faq-tier--5 {
  background: var(--t5);
  color: #FFF4EC;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-tail {
  margin-top: 56px;
  padding: 22px 18px 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber);
}

.page-faq .faq-tail h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 3.2vw, 1.35rem);
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--fg);
}

.page-faq .faq-tail__lead {
  margin: 0 0 18px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg-2);
}

.page-faq .faq-tail__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-tail__links .btn {
  border-radius: 0;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-head {
    padding: 32px 32px 38px;
  }

  .page-faq .faq-head__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(250px, 1fr);
    gap: 34px;
    align-items: end;
  }

  .page-faq .faq-head__stats dd {
    font-size: 18px;
  }

  .page-faq .faq-group--split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 296px;
    column-gap: 28px;
  }

  .page-faq .faq-group--split > .faq-group__head {
    grid-column: 1 / -1;
  }

  .page-faq .faq-group--split > .faq-media {
    grid-column: 2;
    grid-row: 2;
    align-self: start;
    margin-bottom: 0;
  }

  .page-faq .faq-group--split > .faq-items {
    grid-column: 1;
    grid-row: 2;
  }

  .page-faq .faq-item > summary {
    padding: 16px 20px;
    font-size: 17px;
  }

  .page-faq .faq-answer {
    padding: 16px 20px 20px;
  }

  .page-faq .faq-tail {
    padding: 28px 32px 30px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 204px minmax(0, 1fr);
    column-gap: 44px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 16px);
    padding: 16px 12px;
    background: var(--panel);
    border: 1px solid var(--line);
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-index__list > li {
    margin-bottom: 2px;
  }

  .page-faq .faq-index__list a {
    padding: 9px 10px;
    white-space: normal;
    border-color: transparent;
    border-left: 2px solid var(--line);
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    border-color: transparent;
    border-left-color: var(--cyan);
  }

  .page-faq .faq-index__note {
    padding-left: 10px;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-group--split {
    grid-template-columns: minmax(0, 1fr) 340px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0ms !important;
  }

  .page-faq .faq-item[open] .faq-mark {
    transform: none;
  }
}