.page-faq {
  --faq-pad: clamp(18px, 4vw, 44px);
  --faq-gap: clamp(16px, 2.4vw, 28px);
}

.page-faq .faq-wrap {
  padding-top: clamp(14px, 3vw, 30px);
  padding-bottom: clamp(48px, 7vw, 90px);
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 34px);
  padding: var(--faq-pad);
  border: 1px solid var(--line);
  background:
    radial-gradient(90% 130% at 90% -12%, rgba(87, 242, 193, 0.16), transparent 60%),
    radial-gradient(80% 110% at -5% 118%, rgba(31, 111, 92, 0.32), transparent 62%),
    linear-gradient(152deg, #0A2E26 0%, #051F1A 74%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 92px;
  height: 9px;
  background-image: repeating-linear-gradient(90deg, #123E34 0 1px, transparent 1px 9px);
  opacity: 0.95;
  pointer-events: none;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(27px, 5vw, 50px);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--paper);
  max-width: 20em;
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-hero__status {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  background: rgba(5, 31, 26, 0.55);
}

.page-faq .faq-hero__status-title {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal-soft);
}

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

.page-faq .faq-status-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .faq-status-list strong {
  display: block;
  color: var(--paper);
  font-weight: 600;
  margin-bottom: 2px;
}

.page-faq .faq-hero__status-note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  line-height: 1.7;
  color: #7E9E92;
}

/* ---------- 章节公共 ---------- */

.page-faq .faq-lead {
  margin: 0 0 clamp(16px, 2.2vw, 24px);
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .section-head {
  margin-bottom: 12px;
}

/* ---------- 01 问题分流 ---------- */

.page-faq .faq-routes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-route {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--signal);
  background: linear-gradient(180deg, rgba(10, 46, 38, 0.92), rgba(5, 31, 26, 0.72));
}

.page-faq .faq-route--report {
  border-top-color: var(--orange);
}

.page-faq .faq-route--venue {
  border-top-color: var(--coral);
}

.page-faq .faq-route__tag {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--signal-soft);
}

.page-faq .faq-route--report .faq-route__tag {
  color: var(--orange);
}

.page-faq .faq-route--venue .faq-route__tag {
  color: var(--coral);
}

.page-faq .faq-route h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-route p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-route__link {
  margin-top: auto;
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(87, 242, 193, 0.35);
  align-self: flex-start;
}

.page-faq .faq-route__link:hover,
.page-faq .faq-route__link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

.page-faq .faq-figure {
  margin: clamp(18px, 3vw, 28px) 0 0;
}

.page-faq .media-frame {
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

.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;
  font-size: 12px;
  line-height: 1.6;
  color: #7E9E92;
  border-top: 1px dashed var(--line);
}

/* ---------- 02 诊断板 ---------- */

.page-faq .faq-shell {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-faq .faq-shell > input[type="radio"] {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-filter label {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--line);
  background: rgba(10, 46, 38, 0.6);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-filter label:hover {
  color: var(--signal-soft);
  border-color: var(--mid);
}

.page-faq #faq-f-all:checked ~ .faq-filter label[for="faq-f-all"],
.page-faq #faq-f-entry:checked ~ .faq-filter label[for="faq-f-entry"],
.page-faq #faq-f-report:checked ~ .faq-filter label[for="faq-f-report"],
.page-faq #faq-f-venue:checked ~ .faq-filter label[for="faq-f-venue"] {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--ink);
}

.page-faq #faq-f-entry:checked ~ .faq-board .faq-group:not(.faq-group--entry),
.page-faq #faq-f-report:checked ~ .faq-board .faq-group:not(.faq-group--report),
.page-faq #faq-f-venue:checked ~ .faq-board .faq-group:not(.faq-group--venue) {
  display: none;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal-soft);
}

.page-faq .faq-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-index a {
  display: block;
  padding: 6px 12px;
  border-left: 2px solid var(--line);
  background: rgba(10, 46, 38, 0.5);
  font-size: 12.5px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  color: var(--signal);
  border-left-color: var(--signal);
}

.page-faq .faq-board {
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vw, 32px);
  min-width: 0;
}

.page-faq .faq-group__title {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--signal-soft);
}

/* ---------- 手风琴 ---------- */

.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  background:
    repeating-linear-gradient(90deg, rgba(18, 62, 52, 0.45) 0 1px, transparent 1px 22px) top left / 100% 4px no-repeat,
    rgba(10, 46, 38, 0.62);
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .qa[open] {
  border-left-color: var(--signal);
}

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 16px 16px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: -2px;
}

.page-faq .qa__num {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-faq .qa__q {
  font-family: var(--font-display);
  font-size: 15.5px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .qa__mark {
  position: relative;
  width: 16px;
  height: 16px;
  flex: none;
}

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

.page-faq .qa__mark::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .qa__mark::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 0 16px 18px;
  border-top: 1px dashed var(--line);
  margin-top: 2px;
  padding-top: 14px;
}

.page-faq .qa__body p {
  margin: 0 0 12px;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-faq .qa__body strong {
  color: var(--signal-soft);
  font-weight: 600;
}

.page-faq .qa__steps {
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
  display: grid;
  gap: 9px;
}

.page-faq .qa__steps li {
  counter-increment: faq-step;
  position: relative;
  padding-left: 34px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .qa__steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--signal);
  border: 1px solid var(--line);
  padding: 1px 5px;
}

.page-faq .qa__figure {
  margin: 14px 0 0;
}

/* ---------- 03 清单 ---------- */

.page-faq .faq-checklist__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-faq .faq-template-card {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10, 46, 38, 0.9), rgba(5, 31, 26, 0.7));
  padding: 16px;
}

.page-faq .faq-template-card__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal-soft);
}

.page-faq .faq-template {
  margin: 0;
  padding: 16px;
  border: 1px dashed var(--line);
  background: rgba(5, 31, 26, 0.72);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 2;
  color: var(--paper);
  overflow-x: auto;
  user-select: all;
  -webkit-user-select: all;
  white-space: pre;
}

.page-faq .faq-template code {
  font-family: inherit;
}

.page-faq .faq-checklist__notes h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-checklist__notes .qa__steps {
  margin-bottom: 14px;
}

.page-faq .faq-checklist__hint {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  line-height: 1.7;
  color: #7E9E92;
}

/* ---------- 04 联系 ---------- */

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-help__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px;
  border: 1px solid var(--line);
  background: rgba(10, 46, 38, 0.55);
}

.page-faq .faq-help__card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-help__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-help__card .btn {
  align-self: flex-start;
  margin-top: auto;
}

.page-faq .faq-help__mail {
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--signal);
  word-break: break-all;
}

.page-faq .faq-help__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-faq .faq-help__links a {
  font-size: 13.5px;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-help__links a:hover,
.page-faq .faq-help__links a:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-faq .faq-routes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-checklist__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 36px);
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-faq .faq-hero__status {
    margin-top: 4px;
  }

  .page-faq .faq-shell {
    grid-template-columns: 200px minmax(0, 1fr);
    column-gap: clamp(22px, 3.2vw, 44px);
    row-gap: 20px;
  }

  .page-faq .faq-filter {
    grid-column: 1 / -1;
  }

  .page-faq .faq-index {
    grid-column: 1;
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }

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

  .page-faq .faq-index li + li {
    margin-top: 6px;
  }

  .page-faq .faq-index a {
    padding: 7px 12px;
  }

  .page-faq .faq-board {
    grid-column: 2;
  }

  .page-faq .qa__summary {
    padding: 18px 20px 16px;
  }

  .page-faq .qa__body {
    padding: 16px 20px 20px;
  }

  .page-faq .qa__q {
    font-size: 16.5px;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-hero h1 {
    letter-spacing: -0.022em;
  }
}