.page-faq {
  --faq-gap: clamp(20px, 3.4vw, 36px);
  background: var(--ink-900);
  color: var(--ice-50);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq a {
  color: var(--cyan-300);
}

/* 面包屑 */
.page-faq .breadcrumb {
  padding-block: 14px 0;
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
}

.page-faq .breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--slate-300);
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--line-400);
}

.page-faq .breadcrumb__link {
  color: var(--slate-300);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .breadcrumb__link:hover {
  color: var(--cyan-300);
  border-bottom-color: var(--cyan-500);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(26px, 4vw, 46px) clamp(38px, 6vw, 76px);
  border-bottom: 2px solid var(--line-400);
  background:
    radial-gradient(120% 92% at 88% 0%, rgba(34, 211, 238, 0.14), transparent 62%),
    linear-gradient(158deg, var(--ink-800) 0%, var(--ink-900) 54%, var(--void) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -40%;
  left: 34%;
  height: clamp(220px, 34vw, 370px);
  transform: rotate(-7deg);
  background: linear-gradient(122deg, rgba(34, 211, 238, 0.1), rgba(16, 42, 74, 0.88));
  border-top: 2px solid var(--line-400);
  border-left: 2px solid rgba(34, 211, 238, 0.32);
  z-index: -1;
}

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

.page-faq .faq-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--cyan-500);
  text-transform: uppercase;
  border-bottom: 2px solid rgba(34, 211, 238, 0.45);
  display: inline-block;
  padding-bottom: 5px;
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(34px, 6.6vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.045em;
  color: var(--ice-50);
  max-width: 15ch;
}

.page-faq .faq-hero__text {
  margin: 0 0 14px;
  max-width: 52ch;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.78;
  color: var(--slate-300);
}

.page-faq .faq-hero__text--small {
  margin-bottom: 0;
  font-size: 14px;
  color: var(--mint-500);
  border-left: 3px solid var(--mint-500);
  padding-left: 12px;
  max-width: 46ch;
}

/* 定位索引 */
.page-faq .faq-legend {
  border: 2px solid var(--line-400);
  background: rgba(11, 30, 54, 0.9);
  box-shadow: var(--shadow-brut);
  padding: clamp(14px, 2.4vw, 22px);
}

.page-faq .faq-legend__title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--slate-300);
  text-transform: uppercase;
}

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

.page-faq .faq-legend__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  color: var(--ice-50);
  font-size: 14.5px;
  text-decoration: none;
  border: 2px solid transparent;
  border-left: 2px solid var(--line-400);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-legend__link:hover,
.page-faq .faq-legend__link:focus-visible {
  background: rgba(34, 211, 238, 0.09);
  border-color: var(--cyan-500);
  transform: translateX(2px);
}

.page-faq .faq-legend__link:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: 2px;
}

.page-faq .faq-legend__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan-500);
  letter-spacing: 0.08em;
}

.page-faq .faq-legend__label {
  overflow-wrap: anywhere;
}

.page-faq .faq-legend__arrow {
  font-family: var(--font-mono);
  color: var(--orange-500);
  opacity: 0.7;
}

/* 区块与标题 */
.page-faq .faq-section {
  padding-block: clamp(38px, 6vw, 74px);
  border-bottom: 2px solid var(--line-400);
}

.page-faq .faq-body {
  border-bottom: 0;
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-faq .faq-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 34px);
  max-width: 66ch;
}

.page-faq .faq-head__index {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--cyan-500);
  padding-bottom: 5px;
  border-bottom: 2px solid rgba(34, 211, 238, 0.42);
}

.page-faq .faq-head__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.035em;
  color: var(--ice-50);
}

.page-faq .faq-head__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate-300);
}

/* 快速诊断 */
.page-faq .faq-triage__grid {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .triage-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-faq .triage-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 14px;
  padding: clamp(14px, 2vw, 20px);
  background: var(--ink-800);
  border: 2px solid var(--line-400);
  box-shadow: var(--shadow-brut);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .triage-item:hover,
.page-faq .triage-item:focus-within {
  transform: translateY(-2px);
  border-color: var(--cyan-500);
  box-shadow: var(--shadow-lift);
}

.page-faq .triage-item__no {
  margin-top: 3px;
  padding: 2px 7px;
  align-self: start;
  background: var(--cyan-500);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.page-faq .triage-item__body {
  min-width: 0;
}

.page-faq .triage-item__goal {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(15px, 1.9vw, 17.5px);
  line-height: 1.5;
  letter-spacing: -0.012em;
  color: var(--ice-50);
}

.page-faq .triage-item__path {
  margin: 7px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--slate-300);
}

.page-faq .triage-item__link {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan-300);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid rgba(125, 232, 247, 0.4);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .triage-item__link:hover,
.page-faq .triage-item__link:focus-visible {
  color: var(--orange-300);
  border-bottom-color: var(--orange-300);
}

.page-faq .triage-item__link:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: 2px;
}

/* 图片容器 */
.page-faq .media-frame {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 2px solid var(--line-400);
  background:
    linear-gradient(rgba(36, 67, 102, 0.35) 1px, transparent 1px) 0 0 / 100% 26px,
    linear-gradient(90deg, rgba(36, 67, 102, 0.35) 1px, transparent 1px) 0 0 / 26px 100%,
    linear-gradient(160deg, var(--ink-700), var(--ink-900));
  box-shadow: var(--shadow-brut);
}

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

.page-faq .media-frame__caption {
  padding: 10px 14px;
  border-top: 2px solid var(--line-400);
  background: rgba(3, 10, 20, 0.6);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate-300);
}

.page-faq .faq-triage__figure {
  align-self: start;
}

/* 问答主体布局 */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-rail__inner {
  border: 2px solid var(--line-400);
  background: var(--ink-800);
  padding: 8px;
}

.page-faq .faq-rail__label {
  margin: 4px 6px 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--slate-300);
  text-transform: uppercase;
}

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

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 9px 10px;
  font-size: 14px;
  color: var(--slate-300);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-rail__link .mono {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--cyan-500);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--ice-50);
  background: rgba(34, 211, 238, 0.09);
  border-left-color: var(--cyan-500);
}

.page-faq .faq-rail__link:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: -2px;
}

.page-faq .faq-rail__note {
  margin: 12px 6px 4px;
  padding-top: 10px;
  border-top: 2px solid var(--line-400);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate-300);
}

.page-faq .faq-rail__note a {
  color: var(--cyan-300);
}

/* 问答分组 */
.page-faq .faq-panel {
  min-width: 0;
}

.page-faq .faq-group {
  margin-bottom: clamp(30px, 4.2vw, 46px);
  scroll-margin-top: 24px;
}

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

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(18px, 2.4vw, 25px);
  letter-spacing: -0.022em;
  color: var(--ice-50);
}

.page-faq .faq-group__title .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--cyan-500);
}

.page-faq .faq-group__lead {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--slate-300);
}

/* 手风琴 */
.page-faq .faq-item {
  margin-top: 10px;
  border: 2px solid var(--line-400);
  background: var(--ink-800);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(34, 211, 238, 0.62);
}

.page-faq .faq-item[open] {
  border-color: var(--cyan-500);
  box-shadow: var(--shadow-brut);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 14px clamp(14px, 2vw, 20px);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.55;
  letter-spacing: -0.012em;
  color: var(--ice-50);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: -2px;
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--cyan-300);
}

.page-faq .faq-item__no {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--cyan-500);
}

.page-faq .faq-item__text {
  overflow-wrap: anywhere;
}

.page-faq .faq-item__mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  flex: none;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan-500);
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--orange-500);
}

.page-faq .faq-item__a {
  padding: 0 clamp(14px, 2vw, 20px) clamp(14px, 2vw, 20px);
  border-top: 2px solid rgba(36, 67, 102, 0.75);
}

.page-faq .faq-item__a p {
  margin: 12px 0 0;
  font-size: 14.8px;
  line-height: 1.78;
  color: var(--slate-300);
}

.page-faq .faq-item__next {
  margin-top: 14px;
}

/* 工具章节配图 */
.page-faq .faq-tools__figure {
  margin-top: clamp(16px, 2.4vw, 24px);
}

/* 帮助收口 */
.page-faq .faq-help {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(22px, 3.4vw, 34px);
  padding: clamp(18px, 2.6vw, 28px);
  border: 2px solid var(--line-400);
  border-left: 6px solid var(--orange-500);
  background: linear-gradient(135deg, var(--ink-700), var(--ink-800) 72%);
  box-shadow: var(--shadow-brut);
}

.page-faq .faq-help__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(17px, 2.2vw, 22px);
  letter-spacing: -0.022em;
  color: var(--ice-50);
}

.page-faq .faq-help__text {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate-300);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-faq .copy-btn {
  padding: 10px 16px;
  border: 2px solid var(--cyan-500);
  background: transparent;
  color: var(--cyan-300);
  font-family: var(--font-mono);
  font-size: 13px;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .copy-btn:hover {
  background: rgba(34, 211, 238, 0.14);
  color: var(--ice-50);
}

.page-faq .copy-btn:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: 3px;
}

.page-faq .copy-hint {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mint-500);
  min-height: 1em;
}

/* 响应式 */
@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(30px, 5vw, 64px);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-triage__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    gap: clamp(24px, 3.6vw, 44px);
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: clamp(24px, 3.6vw, 48px);
  }

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

@media (max-width: 520px) {
  .page-faq .faq-item__q {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 8px 10px;
    font-size: 15px;
  }

  .page-faq .faq-item__mark {
    display: none;
  }

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

  .page-faq .faq-help__actions .btn,
  .page-faq .copy-btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .triage-item:hover,
  .page-faq .triage-item:focus-within,
  .page-faq .faq-legend__link:hover,
  .page-faq .faq-legend__link:focus-visible {
    transform: none;
  }

  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after {
    transition: none;
  }
}