.page-faq {
  --faq-line: rgba(36, 28, 20, .16);
  --faq-dim: rgba(36, 28, 20, .72);
  --faq-accent: #0B7F72;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-block: clamp(1.25rem, 3vw, 2rem) clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-hero .crumbs {
  margin-bottom: clamp(1.5rem, 4vw, 3rem);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: end;
}

.page-faq .faq-hero h1 {
  margin: .75rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 6vw, 4.3rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero .lead {
  margin: 1.25rem 0 0;
  max-width: 42ch;
  color: var(--text-dim);
  font-size: clamp(.95rem, 1.1vw, 1.05rem);
  line-height: 1.8;
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1.85rem;
}

.page-faq .faq-hero__jump a {
  display: inline-flex;
  align-items: center;
  padding: .45rem .9rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: .8rem;
  letter-spacing: .04em;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .media-frame {
  margin: 0;
}

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

.page-faq .faq-hero__media {
  aspect-ratio: 7 / 4;
}

@media (min-width: 1000px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

/* ---------- 问答主体 ---------- */

.page-faq .faq-body {
  padding-block: clamp(2.25rem, 5vw, 4.5rem) clamp(2.5rem, 6vw, 5rem);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 5rem);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--head-h) + 1.5rem);
  }
}

/* 左侧索引 */

.page-faq .faq-index {
  background: var(--carbon);
  border: 1px solid var(--line);
  padding: 1.15rem 1rem 1.3rem;
  clip-path: polygon(
    var(--cut) 0,
    100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%,
    0 var(--cut)
  );
}

.page-faq .faq-index__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  color: var(--index);
}

.page-faq .faq-index__list {
  list-style: none;
  counter-reset: fidx;
  margin: .85rem 0 0;
  padding: 0;
  display: grid;
  gap: .1rem;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  padding: .5rem .3rem .5rem .55rem;
  border-left: 2px solid transparent;
  color: var(--text-dim);
  text-decoration: none;
  font-size: .875rem;
  line-height: 1.45;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

.page-faq .faq-index__link::before {
  counter-increment: fidx;
  content: counter(fidx, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--index);
  transition: color .18s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(47, 243, 208, .07);
}

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

.page-faq .faq-index__flow {
  margin: 1.1rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.page-faq .faq-index__flow a {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  color: var(--orange);
  text-decoration: none;
  font-size: .82rem;
  letter-spacing: .04em;
}

.page-faq .faq-index__flow a:hover,
.page-faq .faq-index__flow a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* 分组 */

.page-faq .faq-group {
  scroll-margin-top: calc(var(--head-h) + 1.25rem);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(2.25rem, 5vw, 3.75rem);
  padding-top: clamp(2.25rem, 5vw, 3.75rem);
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: .85rem;
  margin-bottom: .9rem;
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--faq-accent);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.2vw, 1.95rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper-ink);
  transition: color .2s ease;
}

.page-faq .faq-group:target .faq-group__title {
  color: var(--faq-accent);
}

.page-faq .faq-group__intro {
  margin: 0 0 clamp(1.25rem, 3vw, 2rem);
  max-width: 48ch;
  color: var(--faq-dim);
  font-size: .95rem;
  line-height: 1.85;
}

.page-faq .faq-files__media {
  max-width: 34rem;
  aspect-ratio: 4 / 3;
  margin: 0 0 clamp(1.25rem, 3vw, 1.85rem);
}

/* 折叠问答 */

.page-faq .fold {
  border: 0;
  border-top: 1px solid var(--faq-line);
  background: transparent;
  margin: 0;
}

.page-faq .fold:last-of-type {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .fold > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.05rem .5rem 1.05rem 1rem;
  border-left: 3px solid transparent;
  color: var(--paper-ink);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
  -webkit-tap-highlight-color: transparent;
  transition: border-color .2s ease, background-color .2s ease;
}

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

.page-faq .fold > summary::marker {
  content: "";
}

.page-faq .fold > summary:hover {
  background: rgba(36, 28, 20, .035);
}

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

.page-faq .fold > summary::before {
  content: "+";
  flex: 0 0 auto;
  width: 1rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.55;
  color: rgba(36, 28, 20, .42);
  transition: color .2s ease;
}

.page-faq .fold[open] > summary {
  border-left-color: var(--faq-accent);
  background: rgba(11, 127, 114, .05);
}

.page-faq .fold[open] > summary::before {
  content: "−";
  color: var(--faq-accent);
}

.page-faq .fold__body {
  padding: .1rem 1.5rem 1.4rem 3.15rem;
  max-width: 62ch;
  color: var(--faq-dim);
  font-size: .95rem;
  line-height: 1.85;
}

.page-faq .fold__body p {
  margin: 0 0 .85rem;
}

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

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

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

/* ---------- 排查清单 ---------- */

.page-faq .faq-flow {
  padding-block: clamp(2.5rem, 6vw, 5rem);
}

.page-faq .faq-flow .section-head {
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-faq .faq-flow h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-faq .faq-flow .section-head p {
  margin: .85rem 0 0;
  max-width: 50ch;
  color: var(--text-dim);
  font-size: .95rem;
  line-height: 1.8;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-faq .faq-step {
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-step:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-faq .faq-step__no::after {
  content: "";
  display: block;
  width: 1.5rem;
  height: 1px;
  margin-top: .8rem;
  background: var(--line-strong);
  transform: rotate(-45deg);
  transform-origin: left center;
}

.page-faq .faq-step h3 {
  margin: 1rem 0 .5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.3;
  color: var(--text);
}

.page-faq .faq-step p {
  margin: 0;
  color: var(--text-dim);
  font-size: .9rem;
  line-height: 1.75;
}

.page-faq .faq-step a {
  color: var(--cyan);
  text-decoration: none;
  word-break: break-all;
}

.page-faq .faq-step a:hover,
.page-faq .faq-step a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-flow__foot {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: clamp(1.5rem, 3vw, 2.25rem);
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.page-faq .faq-flow__foot p {
  margin: 0;
  max-width: 46ch;
  color: var(--text-dim);
  font-size: .92rem;
  line-height: 1.75;
}

.page-faq .faq-flow__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

@media (min-width: 900px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-step {
    padding: 1.5rem 1.5rem 1.6rem 1.75rem;
    border-top: 0;
    border-left: 1px solid var(--line);
  }

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

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

/* ---------- 窄屏收敛 ---------- */

@media (max-width: 620px) {
  .page-faq .fold > summary {
    padding-left: .65rem;
    font-size: .95rem;
    gap: .75rem;
  }

  .page-faq .fold__body {
    padding-left: 2.85rem;
    padding-right: .5rem;
    font-size: .92rem;
  }

  .page-faq .faq-files__media {
    max-width: 100%;
  }

  .page-faq .faq-flow__foot {
    justify-content: flex-start;
  }
}