.page-faq {
  --faq-sec-pad: clamp(1.05rem, 2.6vw, 2rem);
  display: block;
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-faq .faq-topbar {
  width: min(calc(100% - var(--pad-x) - var(--pad-x)), var(--maxw));
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .4rem 1rem;
  padding-block: clamp(.8rem, 2vw, 1.35rem);
  font-size: .82rem;
}

.page-faq .faq-topbar__flag {
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--orange);
}

/* —— 首屏 —— */
.page-faq .faq-hero {
  position: relative;
  width: min(calc(100% - var(--pad-x) - var(--pad-x)), var(--maxw));
  margin-inline: auto;
  padding: clamp(1.15rem, 3vw, 2.5rem);
  border: 2px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 90% at 90% 4%, rgba(43, 231, 196, .20) 0%, rgba(43, 231, 196, 0) 58%),
    radial-gradient(95% 85% at 4% 100%, rgba(15, 91, 63, .75) 0%, rgba(12, 31, 26, 0) 62%),
    var(--grad-panel);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(191, 233, 221, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(191, 233, 221, .07) 1px, transparent 1px);
  background-size: 88px 88px;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(1.15rem, 3vw, 2rem);
}

.page-faq .faq-hero h1 {
  margin: .55rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 5.6vw, 3.4rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-hero .lede {
  margin-top: .85rem;
  max-width: 60ch;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-top: 1.25rem;
}

.page-faq .faq-hero__side {
  align-self: stretch;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(12, 31, 26, .62);
  padding: .9rem 1rem 1rem;
}

.page-faq .faq-hero__side-label {
  margin: 0 0 .6rem;
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--teal);
}

.page-faq .faq-path {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .5rem;
}

.page-faq .faq-path__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: .55rem;
  padding-bottom: .45rem;
  border-bottom: 1px dashed rgba(191, 233, 221, .14);
}

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

.page-faq .faq-path__num {
  font-size: .72rem;
  color: var(--orange);
}

.page-faq .faq-path__text {
  font-size: .86rem;
  line-height: 1.5;
  color: var(--mist);
}

.page-faq .faq-path__time {
  font-size: .72rem;
  color: var(--gray);
}

.page-faq .faq-hero__side-note {
  margin: .75rem 0 0;
  font-size: .78rem;
  color: var(--gray);
}

.page-faq .faq-metrics {
  position: relative;
  margin-top: clamp(1.35rem, 3vw, 2.1rem);
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .9rem 1.1rem;
}

.page-faq .faq-metric {
  padding-left: .7rem;
  border-left: 2px solid var(--line-strong);
}

.page-faq .faq-metric__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3.4vw, 1.85rem);
  font-weight: 700;
  line-height: 1;
  color: var(--teal);
}

.page-faq .faq-metric__label {
  display: block;
  margin-top: .4rem;
  font-size: .76rem;
  line-height: 1.55;
  color: var(--gray);
}

/* —— 主体骨架 —— */
.page-faq .faq-body {
  width: min(calc(100% - var(--pad-x) - var(--pad-x)), var(--maxw));
  margin: clamp(1.25rem, 3vw, 2rem) auto 0;
  display: grid;
  gap: 1.15rem;
  padding-bottom: clamp(1.5rem, 4vw, 3rem);
}

.page-faq .faq-toc {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(12, 31, 26, .6);
  padding: .7rem .8rem;
}

.page-faq .faq-toc__label {
  margin: 0 0 .5rem;
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--gray);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: .35rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-toc__list a {
  display: flex;
  align-items: baseline;
  gap: .4rem;
  padding: .38rem .55rem;
  white-space: nowrap;
  font-size: .85rem;
  color: var(--mist);
  text-decoration: none;
  border-radius: 4px;
  border-left: 2px solid transparent;
}

.page-faq .faq-toc__list a:hover,
.page-faq .faq-toc__list a:focus-visible {
  color: var(--paper);
  background: rgba(43, 231, 196, .12);
}

.page-faq .faq-toc__list a[aria-current="true"] {
  color: var(--paper);
  border-left-color: var(--teal);
  background: rgba(43, 231, 196, .1);
}

.page-faq .faq-toc__list .toc__num {
  font-size: .7rem;
  color: var(--teal);
}

/* —— 章节画板 —— */
.page-faq .faq-sec {
  position: relative;
  margin-bottom: clamp(1rem, 2.6vw, 1.6rem);
  padding: var(--faq-sec-pad);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--grad-panel);
  box-shadow: var(--shadow-panel);
  scroll-margin-top: 1.25rem;
}

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

.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  flex-wrap: wrap;
}

.page-faq .faq-sec__index {
  margin: 0;
  font-size: .9rem;
  letter-spacing: .08em;
  color: var(--orange);
  padding: .1rem .45rem;
  border: 1px solid rgba(255, 122, 61, .45);
  border-radius: 3px;
  line-height: 1.4;
}

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3.6vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-brief {
  margin: .9rem 0 0;
  padding: .8rem .95rem;
  border-left: 3px solid var(--orange);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(15, 91, 63, .5);
  color: var(--mist);
  font-size: .92rem;
  line-height: 1.75;
}

.page-faq .faq-note-inline {
  margin: 1rem 0 0;
  padding: .75rem .9rem;
  border: 1px dashed rgba(43, 231, 196, .35);
  border-radius: var(--radius);
  background: rgba(43, 231, 196, .06);
  font-size: .88rem;
  line-height: 1.7;
  color: var(--mist);
}

/* —— 步骤卡 —— */
.page-faq .faq-steps {
  margin-top: 1rem;
  display: grid;
  gap: .55rem;
}

.page-faq .faq-step {
  border: 1px solid var(--line);
  border-left: 3px solid transparent;
  border-radius: var(--radius);
  background: rgba(12, 31, 26, .55);
  transition: border-color .2s ease, background-color .2s ease;
}

.page-faq .faq-step[open] {
  border-left-color: var(--teal);
  background: rgba(15, 91, 63, .22);
}

.page-faq .faq-step summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: .55rem;
  padding: .72rem .85rem;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-step summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--teal);
  line-height: 1;
}

.page-faq .faq-step[open] summary::after {
  content: "–";
}

.page-faq .faq-step__num {
  font-size: 1.05rem;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-faq .faq-step__label {
  font-size: .95rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-step__time {
  font-size: .68rem;
  color: var(--gray);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .12rem .45rem;
}

.page-faq .faq-step__body {
  padding: .75rem .9rem .95rem;
  border-top: 1px dashed rgba(191, 233, 221, .16);
  color: var(--mist);
  font-size: .92rem;
  line-height: 1.78;
}

.page-faq .faq-step__body p {
  margin: 0;
}

/* —— 问答 —— */
.page-faq .faq-qas {
  margin-top: 1rem;
  display: grid;
  gap: .7rem;
}

.page-faq .faq-qas__item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .85rem .95rem;
  background: rgba(12, 31, 26, .45);
}

.page-faq .faq-qas__q {
  margin: 0;
  display: flex;
  gap: .45rem;
  font-size: .96rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .faq-qas__q::before {
  content: "Q";
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--orange);
  line-height: 1.9;
}

.page-faq .faq-qas__a {
  margin: .4rem 0 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--mist);
}

/* —— 检索 —— */
.page-faq .faq-split {
  margin-top: 1rem;
  display: grid;
  gap: 1rem;
}

.page-faq .faq-split__text p {
  margin: 0 0 .7rem;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--mist);
}

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

.page-faq .faq-chips {
  list-style: none;
  margin: .2rem 0 .9rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.page-faq .faq-chips li {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--teal);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: .25rem .7rem;
  background: rgba(43, 231, 196, .07);
}

/* —— 图示 —— */
.page-faq .faq-figure {
  margin: 1rem 0 0;
}

.page-faq .faq-figure .figure__frame {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(12, 31, 26, .6);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .3);
}

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

.page-faq .faq-figure .figure__caption {
  margin-top: .5rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .04em;
  color: var(--gray);
}

.page-faq .faq-split .faq-figure {
  margin-top: 0;
}

/* —— 排查轨道 —— */
.page-faq .faq-track {
  margin-top: 1rem;
  display: grid;
  gap: .7rem;
}

.page-faq .faq-track__item {
  padding: .9rem 1rem;
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: 0 0 var(--radius) var(--radius);
  background: rgba(12, 31, 26, .5);
}

.page-faq .faq-track__num {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--teal);
}

.page-faq .faq-track__title {
  margin: .45rem 0 0;
  font-size: .98rem;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-track__text {
  margin: .4rem 0 0;
  font-size: .89rem;
  line-height: 1.72;
  color: var(--mist);
}

/* —— 双卡 —— */
.page-faq .faq-pair {
  margin-top: 1rem;
  display: grid;
  gap: .7rem;
}

.page-faq .faq-pair__card {
  padding: .9rem 1rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius);
  background: rgba(12, 31, 26, .45);
}

.page-faq .faq-pair__title {
  margin: 0;
  font-size: .96rem;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-pair__text {
  margin: .45rem 0 0;
  font-size: .89rem;
  line-height: 1.72;
  color: var(--mist);
}

/* —— 联系 —— */
.page-faq .faq-contact {
  margin-top: 1rem;
  display: grid;
  gap: .7rem;
}

.page-faq .faq-contact__item {
  padding: .85rem .95rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(15, 91, 63, .18);
}

.page-faq .faq-contact__label {
  display: block;
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--gray);
}

.page-faq .faq-contact__value {
  display: block;
  margin-top: .35rem;
  font-size: .95rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
  word-break: break-word;
  text-decoration: none;
}

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

/* —— 延伸阅读 —— */
.page-faq .faq-further {
  margin-top: 1.1rem;
  padding-top: .85rem;
  border-top: 1px dashed rgba(191, 233, 221, .2);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .4rem 1.15rem;
  font-size: .87rem;
}

.page-faq .faq-further__label {
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--gray);
}

/* —— 响应式 —— */
@media (min-width: 760px) {
  .page-faq .faq-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-qas,
  .page-faq .faq-track,
  .page-faq .faq-pair,
  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-contact__item:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-split {
    grid-template-columns: 1.05fr .95fr;
    align-items: start;
    gap: 1.35rem;
  }

  .page-faq .faq-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: 1.5fr .9fr;
    align-items: end;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 238px;
    grid-template-areas: "main toc";
    gap: 2.25rem;
    align-items: start;
  }

  .page-faq .faq-content {
    grid-area: main;
    min-width: 0;
  }

  .page-faq .faq-toc {
    grid-area: toc;
    position: sticky;
    top: 1rem;
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: .12rem;
    overflow: visible;
  }

  .page-faq .faq-toc__list a {
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step {
    transition: none;
  }
}