.page-faq {
  --faq-rule: rgba(143, 166, 188, 0.38);
  --faq-rule-strong: rgba(143, 166, 188, 0.72);
  --faq-body-text: rgba(242, 245, 243, 0.8);
  --faq-panel: rgba(11, 59, 46, 0.55);
  display: block;
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4.5vw, 46px) 0 clamp(38px, 6vw, 64px);
  background: var(--ink);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: -10%;
  bottom: -34%;
  width: 54%;
  height: 158%;
  background: linear-gradient(180deg, rgba(22, 224, 200, 0.14), rgba(22, 224, 200, 0) 72%);
  transform: rotate(-13deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan) 0 34%, var(--flare) 34% 56%, var(--amber) 56% 78%, var(--steel) 78% 100%);
}

.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumb {
  margin: 0 0 26px;
  font-size: 13px;
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 6px;
  color: var(--steel-light);
}

.page-faq .breadcrumb__link {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .breadcrumb__link:hover,
.page-faq .breadcrumb__link:focus-visible {
  text-decoration: underline;
}

.page-faq .breadcrumb__current {
  color: var(--steel-light);
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-family: var(--sans);
  font-size: clamp(30px, 6.2vw, 60px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--paper);
  max-width: 18ch;
  text-wrap: balance;
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.75;
  color: var(--faq-body-text);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 0;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 22px;
  border-left: 2px solid var(--faq-rule);
}

.page-faq .faq-hero__stats li:first-child {
  padding-left: 0;
  border-left: 0;
}

.page-faq .faq-hero__num {
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-hero__unit {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--steel-light);
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 28px;
  padding: clamp(30px, 5vw, 56px) 0 clamp(48px, 8vw, 88px);
}

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

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

.page-faq .faq-toc__link {
  display: block;
  padding: 9px 14px;
  white-space: nowrap;
  font-size: 14.5px;
  color: rgba(242, 245, 243, 0.72);
  text-decoration: none;
  border: 0;
  border-bottom: 3px solid var(--faq-rule);
  border-radius: 2px;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--cyan-soft);
  background: rgba(22, 224, 200, 0.09);
  border-bottom-color: var(--cyan);
  outline: none;
}

.page-faq .faq-toc__link.is-active {
  color: var(--near-black);
  background: var(--cyan);
  border-bottom-color: var(--cyan);
  font-weight: 700;
}

.page-faq .faq-body {
  min-width: 0;
}

/* ---------- 内容区块 ---------- */
.page-faq .faq-block {
  padding: clamp(30px, 5vw, 52px) 0;
  border-top: 2px solid var(--faq-rule);
  scroll-margin-top: 128px;
}

.page-faq .faq-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-block__head {
  display: grid;
  gap: 10px;
  margin-bottom: 26px;
}

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

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--sans);
  font-size: clamp(23px, 3.4vw, 34px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-block__intro {
  margin: 0;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-body-text);
}

/* ---------- 步骤 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 18px 20px;
  background: var(--faq-panel);
  border: 2px solid var(--faq-rule);
  border-left: 4px solid var(--cyan);
  border-radius: 2px;
}

.page-faq .faq-step__num {
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-step__title {
  margin: 0 0 6px;
  font-family: var(--sans);
  font-size: 17.5px;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.4;
  color: var(--paper);
}

.page-faq .faq-step__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--faq-body-text);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 26px 0 0;
  background: var(--ink-deep);
  border: 2px solid var(--faq-rule-strong);
  border-radius: 2px;
  box-shadow: 6px 6px 0 rgba(22, 224, 200, 0.3);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--faq-body-text);
  border-top: 2px solid var(--faq-rule);
}

/* ---------- 检索技巧 ---------- */
.page-faq .faq-tips {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-tip {
  display: grid;
  gap: 6px;
  padding: 18px 0 18px 20px;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-tip:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-tip__key {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-tip__body h3 {
  margin: 0 0 6px;
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-tip__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--faq-body-text);
}

/* ---------- 字段表 ---------- */
.page-faq .faq-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-faq .faq-tabs__tab {
  font-family: var(--sans);
  font-size: 14.5px;
  font-weight: 700;
  padding: 10px 20px;
  color: var(--paper);
  background: transparent;
  border: 2px solid var(--faq-rule-strong);
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-tabs__tab:hover {
  border-color: var(--cyan);
  color: var(--cyan-soft);
}

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

.page-faq .faq-tabs__tab:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-tabpanel {
  display: block;
}

.page-faq .faq-tabpanel[hidden] {
  display: none;
}

.page-faq .faq-table-scroll {
  overflow-x: auto;
  border: 2px solid var(--faq-rule);
  border-radius: 2px;
  background: rgba(5, 35, 28, 0.6);
}

.page-faq .faq-field-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-faq .faq-field-table__caption {
  padding: 12px 14px;
  text-align: left;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--steel-light);
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-field-table th,
.page-faq .faq-field-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-field-table thead th {
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--steel);
  border-bottom: 2px solid var(--near-black);
  white-space: nowrap;
}

.page-faq .faq-field-table tbody td:first-child {
  font-family: var(--mono);
  font-weight: 700;
  color: var(--cyan);
  white-space: nowrap;
}

.page-faq .faq-field-table tbody td {
  color: var(--faq-body-text);
  line-height: 1.65;
}

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

.page-faq .faq-field-table tbody tr:hover {
  background: rgba(22, 224, 200, 0.08);
}

/* ---------- 更新节点 ---------- */
.page-faq .faq-updates {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-updates li {
  position: relative;
  padding: 0 0 22px 24px;
}

.page-faq .faq-updates li:last-child {
  padding-bottom: 0;
}

.page-faq .faq-updates li::before {
  content: "";
  position: absolute;
  left: -9.5px;
  top: 5px;
  width: 14px;
  height: 14px;
  background: var(--cyan);
  border: 2px solid var(--near-black);
  border-radius: 50%;
}

.page-faq .faq-updates__time {
  display: block;
  margin-bottom: 5px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-faq .faq-updates p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--faq-body-text);
}

/* ---------- 折叠疑难 ---------- */
.page-faq .faq-group {
  margin-top: 32px;
}

.page-faq .faq-group:first-of-type {
  margin-top: 0;
}

.page-faq .faq-group__title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
  font-family: var(--sans);
  font-size: 16.5px;
  font-weight: 800;
  color: var(--paper);
}

.page-faq .faq-group__tag {
  padding: 4px 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  border-radius: 2px;
}

.page-faq .faq-group__tag--cyan {
  background: var(--cyan);
  color: var(--near-black);
}

.page-faq .faq-group__tag--amber {
  background: var(--amber);
  color: var(--near-black);
}

.page-faq .faq-group__tag--wine {
  background: var(--wine);
  color: var(--paper);
}

.page-faq .faq-group__tag--steel {
  background: var(--steel);
  color: var(--paper);
}

.page-faq .faq-group__intro {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--steel-light);
}

.page-faq .faq-fold {
  margin-bottom: 10px;
  background: var(--faq-panel);
  border: 2px solid var(--faq-rule);
  border-radius: 2px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .faq-fold[open] {
  border-color: var(--cyan);
  box-shadow: 4px 4px 0 rgba(22, 224, 200, 0.28);
}

.page-faq .faq-fold__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 18px;
  list-style: none;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-fold__summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-fold__summary:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: -3px;
}

.page-faq .faq-fold__mark {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
}

.page-faq .faq-fold__mark::before,
.page-faq .faq-fold__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.22s ease;
}

.page-faq .faq-fold__mark::before {
  top: 50%;
  left: 0;
  width: 20px;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .faq-fold__mark::after {
  left: 50%;
  top: 0;
  width: 2px;
  height: 20px;
  transform: translateX(-50%);
}

.page-faq .faq-fold[open] .faq-fold__mark::after {
  transform: translateX(-50%) scaleY(0);
}

.page-faq .faq-fold__body {
  padding: 0 18px 18px;
}

.page-faq .faq-fold__body p {
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--faq-body-text);
}

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

/* ---------- 结尾引导 ---------- */
.page-faq .faq-cta {
  position: relative;
  overflow: hidden;
  margin-top: clamp(36px, 6vw, 60px);
  padding: clamp(26px, 4.5vw, 46px);
  background: linear-gradient(135deg, var(--turf) 0%, var(--ink-deep) 100%);
  border: 2px solid var(--cyan);
  border-radius: 2px;
}

.page-faq .faq-cta::before {
  content: "";
  position: absolute;
  top: -46%;
  right: -14%;
  width: 46%;
  height: 190%;
  background: rgba(22, 224, 200, 0.09);
  transform: rotate(-16deg);
  pointer-events: none;
}

.page-faq .faq-cta > * {
  position: relative;
}

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

.page-faq .faq-cta__title {
  margin: 10px 0 0;
  font-family: var(--sans);
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-cta__text {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-body-text);
}

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

.page-faq .faq-cta__note {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--faq-rule);
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel-light);
}

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

.page-faq .faq-cta__note a:hover,
.page-faq .faq-cta__note a:focus-visible {
  color: var(--cyan-soft);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 128px;
    align-self: start;
  }

  .page-faq .faq-toc__list {
    display: grid;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-toc__link {
    white-space: normal;
    border-bottom: 0;
    border-left: 3px solid var(--faq-rule);
    font-size: 15px;
  }

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

  .page-faq .faq-hero__stats li {
    padding: 0 26px;
  }

  .page-faq .faq-block__head {
    max-width: 74ch;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__title {
    font-size: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .faq-tabs__tab,
  .page-faq .faq-fold,
  .page-faq .faq-fold__mark::before,
  .page-faq .faq-fold__mark::after {
    transition: none;
  }
}