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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: clamp(1.25rem, 3vw, 2.25rem);
  background-color: var(--ink);
  background-image: repeating-linear-gradient(90deg, rgba(199, 215, 226, .055) 0 1px, transparent 1px 92px);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.page-faq .eyebrow {
  color: var(--cyan);
  letter-spacing: .16em;
}

.page-faq h1 {
  margin: .5rem 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 7.6vw, 5.25rem);
  line-height: .96;
  letter-spacing: .012em;
  color: var(--paper);
}

.page-faq .faq-h1-mark {
  display: block;
  color: var(--signal);
}

.page-faq .faq-lead {
  margin: 1.15rem 0 0;
  max-width: 34em;
  font-size: clamp(.98rem, 1.2vw, 1.06rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero-panel {
  display: grid;
  gap: .1rem;
  border-top: 2px solid var(--signal);
  padding-top: .9rem;
}

.page-faq .faq-stat {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: .55rem 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-stat-num {
  min-width: 3.2em;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-faq .faq-stat span:last-child {
  font-size: .82rem;
  letter-spacing: .02em;
  color: var(--warm);
}

.page-faq .faq-scale {
  position: relative;
  height: 38px;
  margin-top: .25rem;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-scale::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, var(--line-dark) 0 1px, transparent 1px 10px),
    repeating-linear-gradient(90deg, rgba(199, 215, 226, .42) 0 1px, transparent 1px 80px);
  background-repeat: repeat-x, repeat-x;
  background-size: auto 11px, auto 24px;
  background-position: 0 0, 0 0;
}

.page-faq .faq-scale::after {
  content: "";
  position: absolute;
  left: 6%;
  top: 0;
  width: 2px;
  height: 30px;
  background: var(--signal);
}

/* ---------- 问答区 ---------- */
.page-faq .faq-board-section {
  padding: clamp(2rem, 5vw, 4rem) 0 clamp(2.5rem, 6vw, 5rem);
  background: var(--paper);
  color: var(--text);
}

.page-faq .faq-board-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .6rem;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
  padding-bottom: .9rem;
  border-bottom: 1px solid var(--line-paper);
}

.page-faq .faq-board-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.4vw, 2.6rem);
  letter-spacing: .02em;
  color: var(--text);
}

.page-faq .faq-board-meta {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--signal-deep);
}

.page-faq .faq-board {
  position: relative;
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.page-faq .faq-filter {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* 索引栏 */
.page-faq .faq-index {
  display: flex;
  gap: .35rem;
  padding: .6rem;
  overflow-x: auto;
  background: var(--ink);
  border-radius: var(--radius-lg);
  scrollbar-width: thin;
}

.page-faq .faq-index-title {
  display: none;
  margin: 0 0 .7rem;
  padding: 0 .35rem;
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--warm);
}

.page-faq .faq-index-item {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex: 0 0 auto;
  padding: .5rem .7rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: .88rem;
  white-space: nowrap;
  color: var(--mist);
  cursor: pointer;
  transition: background .12s var(--ease), color .12s var(--ease), border-color .12s var(--ease);
}

.page-faq .faq-index-item:hover {
  border-color: var(--line-dark);
  color: var(--paper);
}

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

/* 选中态 */
.page-faq #faq-all:checked ~ .faq-index [for="faq-all"],
.page-faq #faq-01:checked ~ .faq-index [for="faq-01"],
.page-faq #faq-02:checked ~ .faq-index [for="faq-02"],
.page-faq #faq-03:checked ~ .faq-index [for="faq-03"],
.page-faq #faq-04:checked ~ .faq-index [for="faq-04"],
.page-faq #faq-05:checked ~ .faq-index [for="faq-05"] {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--ink);
  font-weight: 600;
}

.page-faq #faq-all:checked ~ .faq-index [for="faq-all"] .faq-num,
.page-faq #faq-01:checked ~ .faq-index [for="faq-01"] .faq-num,
.page-faq #faq-02:checked ~ .faq-index [for="faq-02"] .faq-num,
.page-faq #faq-03:checked ~ .faq-index [for="faq-03"] .faq-num,
.page-faq #faq-04:checked ~ .faq-index [for="faq-04"] .faq-num,
.page-faq #faq-05:checked ~ .faq-index [for="faq-05"] .faq-num {
  color: var(--ink);
}

.page-faq #faq-all:focus-visible ~ .faq-index [for="faq-all"],
.page-faq #faq-01:focus-visible ~ .faq-index [for="faq-01"],
.page-faq #faq-02:focus-visible ~ .faq-index [for="faq-02"],
.page-faq #faq-03:focus-visible ~ .faq-index [for="faq-03"],
.page-faq #faq-04:focus-visible ~ .faq-index [for="faq-04"],
.page-faq #faq-05:focus-visible ~ .faq-index [for="faq-05"] {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* 分组 */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  min-width: 0;
}

.page-faq .faq-group {
  display: block;
  min-width: 0;
}

.page-faq #faq-01:checked ~ .faq-groups .faq-group,
.page-faq #faq-02:checked ~ .faq-groups .faq-group,
.page-faq #faq-03:checked ~ .faq-groups .faq-group,
.page-faq #faq-04:checked ~ .faq-groups .faq-group,
.page-faq #faq-05:checked ~ .faq-groups .faq-group {
  display: none;
}

.page-faq #faq-01:checked ~ .faq-groups .faq-group--01,
.page-faq #faq-02:checked ~ .faq-groups .faq-group--02,
.page-faq #faq-03:checked ~ .faq-groups .faq-group--03,
.page-faq #faq-04:checked ~ .faq-groups .faq-group--04,
.page-faq #faq-05:checked ~ .faq-groups .faq-group--05 {
  display: block;
}

.page-faq .faq-group-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .45rem .9rem;
  padding: .8rem 1rem;
  background: var(--mist);
  border-left: 3px solid var(--ink);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-faq .faq-group-num {
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--signal-deep);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  line-height: 1.15;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-faq .faq-group-count {
  margin-left: auto;
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--ink);
  opacity: .6;
}

.page-faq .faq-group-lead {
  margin: 1rem 0 1.1rem;
  padding: 0 .1rem;
  max-width: 38em;
  font-size: .95rem;
  line-height: 1.8;
  color: rgba(16, 24, 32, .78);
}

.page-faq .faq-split {
  display: grid;
  gap: 1.25rem;
}

.page-faq .faq-qlist {
  min-width: 0;
  border-bottom: 1px solid var(--line-paper);
}

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

.page-faq .faq-group summary {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  padding: .95rem .2rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  transition: color .12s var(--ease);
}

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

.page-faq .faq-group summary:hover {
  color: var(--signal-deep);
}

.page-faq .faq-group summary:focus-visible {
  outline: 2px solid var(--signal-deep);
  outline-offset: 3px;
}

.page-faq .faq-group summary::after {
  content: "+";
  margin-left: auto;
  padding-top: .1rem;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--signal-deep);
}

.page-faq .faq-group details[open] summary::after {
  content: "\2212";
}

.page-faq .faq-q-mark {
  flex: 0 0 auto;
  padding-top: .22rem;
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--signal-deep);
}

.page-faq .faq-a {
  padding: 0 .2rem 1.15rem 1.85rem;
  font-size: .94rem;
  line-height: 1.85;
  color: rgba(16, 24, 32, .8);
}

.page-faq .faq-a p {
  margin: 0 0 .75rem;
}

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

.page-faq .faq-note {
  display: block;
  margin-top: .85rem;
  padding: .7rem .85rem;
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(39, 211, 224, .1);
  font-size: .87rem;
  line-height: 1.7;
  color: rgba(16, 24, 32, .82);
}

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

.page-faq .faq-figure .media-frame {
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  margin-top: .55rem;
  font-size: .7rem;
  letter-spacing: .07em;
  color: rgba(16, 24, 32, .5);
}

.page-faq .faq-figure--wide {
  margin-bottom: 1.25rem;
}

/* ---------- 底部入口 ---------- */
.page-faq .faq-help {
  padding: clamp(2rem, 5vw, 4rem) 0 clamp(2.25rem, 5vw, 4.5rem);
  background: var(--ink-2);
  color: var(--paper);
}

.page-faq .faq-help .eyebrow {
  color: var(--signal);
}

.page-faq .faq-help-title {
  margin: .6rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.6vw, 2.75rem);
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-faq .faq-help-lead {
  margin: .9rem 0 0;
  max-width: 36em;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-help-grid {
  display: grid;
  gap: .9rem;
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  grid-template-columns: 1fr;
}

.page-faq .faq-link-card {
  display: grid;
  gap: .4rem;
  padding: 1.1rem 1.15rem 1.3rem;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: rgba(11, 27, 43, .55);
  text-decoration: none;
  color: var(--paper);
  transition: border-color .16s var(--ease), transform .16s var(--ease), background-color .16s var(--ease);
}

.page-faq .faq-link-card:hover,
.page-faq .faq-link-card:focus-visible {
  border-color: var(--cyan);
  background: rgba(11, 27, 43, .85);
  transform: translateY(-3px);
  outline: none;
}

.page-faq .faq-link-num {
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--signal);
}

.page-faq .faq-link-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: .03em;
  color: var(--paper);
}

.page-faq .faq-link-text {
  font-size: .86rem;
  line-height: 1.7;
  color: var(--warm);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-help-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1fr) 290px;
    align-items: end;
  }

  .page-faq .faq-board {
    grid-template-columns: 210px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
    overflow: visible;
    padding: 1.1rem .9rem;
  }

  .page-faq .faq-index-title {
    display: block;
  }

  .page-faq .faq-index-item {
    width: 100%;
    padding: .65rem .4rem;
    border: 0;
    border-bottom: 1px solid var(--line-dark);
    border-radius: 0;
    font-size: .9rem;
  }

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

  .page-faq #faq-all:checked ~ .faq-index [for="faq-all"],
  .page-faq #faq-01:checked ~ .faq-index [for="faq-01"],
  .page-faq #faq-02:checked ~ .faq-index [for="faq-02"],
  .page-faq #faq-03:checked ~ .faq-index [for="faq-03"],
  .page-faq #faq-04:checked ~ .faq-index [for="faq-04"],
  .page-faq #faq-05:checked ~ .faq-index [for="faq-05"] {
    padding-left: .55rem;
    border-radius: var(--radius);
    border-bottom-color: transparent;
  }

  .page-faq .faq-help-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }

  .page-faq .faq-split .faq-figure {
    margin-top: .2rem;
  }
}