.page-faq {
  --faq-index-w: 248px;
  --faq-paper-ink: #0B1A15;
  --faq-paper-muted: #33473F;
}

.page-faq img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  padding: 28px 0 0;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 72px),
    radial-gradient(120% 90% at 12% 0%, rgba(20, 230, 198, 0.13) 0%, transparent 58%),
    radial-gradient(90% 70% at 92% 8%, rgba(255, 106, 43, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.page-faq .faq-hero .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .eyebrow {
  margin: 22px 0 14px;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  max-width: 20em;
  font-family: var(--font-narrow);
  font-size: clamp(28px, 6.2vw, 54px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero .lede {
  max-width: 62ch;
  margin: 0;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-faq .faq-hero .data-band {
  margin: 32px 0 0;
}

.page-faq .faq-hero .stat__num {
  color: var(--cyan);
  text-shadow: 0 0 18px rgba(134, 251, 232, 0.4);
}

/* 现象速查条 */
.page-faq .faq-quickbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 26px;
  padding: 18px 0 26px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-quickbar__label {
  margin: 0 6px 0 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-faq .faq-quickbar__link {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(10, 33, 24, 0.72);
  color: var(--silver);
  font-size: 13px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

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

/* 双栏：左侧索引 + 右侧条目 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  padding: 8px 0 72px;
}

.page-faq .faq-index {
  min-width: 0;
}

.page-faq .faq-index__head {
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-strong);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

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

.page-faq .faq-index__item a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 11px 12px;
  border-left: 2px solid transparent;
  border-bottom: 1px solid var(--line-soft);
  color: var(--silver);
  font-size: 14.5px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-index__item a:hover,
.page-faq .faq-index__item a:focus-visible {
  color: var(--text);
  background: var(--panel);
  border-left-color: var(--cyan);
}

.page-faq .faq-index__num {
  font-size: 11px;
  color: var(--muted);
}

.page-faq .faq-index__count {
  font-size: 12px;
  color: var(--orange);
}

.page-faq .faq-index__panel {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel-2) 0%, var(--panel) 100%);
}

.page-faq .faq-index__note {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

/* 分类区块 */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-cat {
  margin-bottom: 56px;
  scroll-margin-top: calc(var(--strip-h) + 24px);
}

.page-faq .faq-cat__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-cat__num {
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-cat__title {
  margin: 0;
  font-size: clamp(20px, 3.4vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-cat__count {
  margin-left: auto;
  font-size: 12px;
  color: var(--orange);
  white-space: nowrap;
}

.page-faq .faq-cat__desc {
  margin: 14px 0 20px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.page-faq .faq-cat__desc a,
.page-faq .faq-item__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(20, 230, 198, 0.4);
}

.page-faq .faq-cat__desc a:hover,
.page-faq .faq-item__body a:hover {
  border-bottom-color: var(--cyan);
}

/* 手风琴 */
.page-faq .faq-list {
  display: grid;
  gap: 8px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  background: var(--panel-2);
  border-color: var(--line-strong);
}

.page-faq .faq-item summary {
  position: relative;
  padding: 14px 46px 14px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 10px;
}

.page-faq .faq-item__body {
  padding: 0 46px 16px 16px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.8;
}

.page-faq .faq-item__body p {
  margin: 0 0 10px;
}

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

/* 图片容器补充 */
.page-faq .faq-figure {
  margin: 0 0 20px;
}

.page-faq .faq-figure .figure-frame__media img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 10px;
}

/* 三步自检（明暗反转） */
.page-faq .steps-panel {
  margin: 0 0 56px;
  padding: 26px 20px 30px;
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--faq-paper-ink);
  scroll-margin-top: calc(var(--strip-h) + 24px);
}

.page-faq .steps-panel .eyebrow {
  margin: 0 0 10px;
  color: #0A6B5A;
  letter-spacing: 0.18em;
}

.page-faq .steps-panel__title {
  margin: 0 0 22px;
  max-width: 24em;
  font-size: clamp(21px, 3.6vw, 28px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--faq-paper-ink);
}

.page-faq .steps-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

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

.page-faq .step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px dashed rgba(5, 19, 15, 0.18);
}

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

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

.page-faq .step__num {
  font-size: 22px;
  font-weight: 700;
  color: var(--panel-2);
  line-height: 1.2;
}

.page-faq .step__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--faq-paper-ink);
}

.page-faq .step__text {
  margin: 0;
  color: var(--faq-paper-muted);
  font-size: 14px;
  line-height: 1.8;
}

.page-faq .steps-panel .figure-frame__cap {
  color: var(--faq-paper-muted);
  font-size: 12.5px;
}

.page-faq .steps-panel .figure-frame {
  margin: 0;
}

/* 工具选择 */
.page-faq .tool-guide {
  margin-bottom: 56px;
  padding-top: 6px;
}

.page-faq .tool-guide .eyebrow {
  margin: 0 0 10px;
  color: var(--cyan);
}

.page-faq .tool-guide__title {
  margin: 0 0 12px;
  max-width: 26em;
  font-size: clamp(21px, 3.6vw, 28px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .tool-guide__lede {
  margin: 0 0 24px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
}

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

.page-faq .tool-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, var(--panel) 0%, var(--ink) 100%);
}

.page-faq .tool-card__tag {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-faq .tool-card__title {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .tool-card__text {
  margin: 0;
  flex: 1 1 auto;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.page-faq .tool-card__link {
  align-self: flex-start;
  color: var(--cyan);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid rgba(20, 230, 198, 0.45);
  padding-bottom: 2px;
}

.page-faq .tool-card__link:hover,
.page-faq .tool-card__link:focus-visible {
  border-bottom-color: var(--cyan);
  color: var(--cyan-mist);
}

/* 联络升级 */
.page-faq .escalate {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: 26px 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(20, 230, 198, 0.09) 0%, transparent 46%),
    linear-gradient(180deg, var(--panel-2) 0%, var(--ink) 100%);
  scroll-margin-top: calc(var(--strip-h) + 24px);
}

.page-faq .escalate .eyebrow {
  margin: 0 0 10px;
  color: var(--orange);
}

.page-faq .escalate__title {
  margin: 0 0 12px;
  font-size: clamp(20px, 3.4vw, 26px);
  font-weight: 800;
  line-height: 1.28;
  color: var(--text);
}

.page-faq .escalate__text {
  margin: 0 0 20px;
  max-width: 56ch;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
}

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

.page-faq .escalate__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(5, 19, 15, 0.55);
}

.page-faq .escalate__label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .escalate__value {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text);
  word-break: break-all;
}

.page-faq .escalate__side {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}

.page-faq .escalate__side-title {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .escalate__side-text {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.7;
}

.page-faq .escalate__side .btn {
  margin-top: 6px;
}

/* 断点：双栏与栅格 */
@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 44px;
    padding-bottom: 96px;
  }

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

  .page-faq .steps-panel {
    padding: 34px 32px 38px;
  }

  .page-faq .steps-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 34px;
    align-items: start;
  }

  .page-faq .tool-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .escalate {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    gap: 28px;
    padding: 34px 32px;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-hero {
    padding-top: 36px;
  }

  .page-faq .faq-hero .data-band {
    margin-top: 40px;
  }
}

/* 窄屏收口 */
@media (max-width: 560px) {
  .page-faq .faq-hero h1 {
    font-size: clamp(26px, 8vw, 34px);
  }

  .page-faq .faq-hero .lede {
    font-size: 14.5px;
  }

  .page-faq .faq-cat {
    margin-bottom: 44px;
  }

  .page-faq .faq-item summary {
    padding: 13px 40px 13px 14px;
    font-size: 14.5px;
  }

  .page-faq .faq-item__body {
    padding: 0 18px 14px 14px;
    font-size: 14px;
  }

  .page-faq .steps-panel {
    padding: 22px 16px 26px;
  }

  .page-faq .escalate {
    padding: 22px 16px;
  }

  .page-faq .escalate__value {
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quickbar__link,
  .page-faq .faq-index__item a,
  .page-faq .faq-item {
    transition: none;
  }
}