/* ===== 查阅支持 /support/ ===== */
.page-faq {
  --faq-rail: 246px;
  --faq-gap: clamp(22px, 3.2vw, 46px);
  --faq-face: var(--paper-bone);
  --faq-quiet: var(--muted-sage);
  position: relative;
  padding: clamp(10px, 2vw, 26px) 0 clamp(48px, 8vw, 110px);
  color: var(--faq-face);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.62;
  background:
    linear-gradient(180deg, rgba(18, 39, 31, 0.85) 0%, rgba(13, 20, 18, 0) 26%),
    var(--carbon-ink);
}

.page-faq > .container > .breadcrumb {
  margin-bottom: clamp(16px, 2.6vw, 30px);
}

/* ---- 首屏 ---- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3.6vw, 46px) clamp(16px, 2.6vw, 36px);
  border: var(--line);
  background: var(--pitch-forest);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 var(--panel-moss), 0 22px 44px -36px rgba(0, 0, 0, 0.95);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -50px;
  top: -50px;
  width: 190px;
  height: 190px;
  background: linear-gradient(135deg, var(--lime-home), rgba(200, 242, 74, 0) 68%);
  opacity: 0.13;
  transform: rotate(12deg);
  pointer-events: none;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--steel-blue);
}

.page-faq .faq-hero__title {
  margin: 0 0 14px;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(28px, 5.4vw, 58px);
  line-height: 1.04;
  letter-spacing: 0.005em;
  color: var(--paper-bone);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  color: var(--muted-sage);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-copy {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

/* ---- 两栏骨架 ---- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  margin-top: var(--faq-gap);
}

.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  min-width: 0;
}

/* ---- 问题目录 ---- */
.page-faq .faq-toc {
  padding: 12px 0;
  border: var(--line);
  background: var(--pitch-forest);
  border-radius: var(--radius);
}

.page-faq .faq-toc__head {
  margin: 0 16px 10px;
  padding-bottom: 10px;
  border-bottom: var(--line);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--steel-blue);
}

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

.page-faq .faq-toc__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 16px;
  border-left: 2px solid transparent;
  color: var(--paper-bone);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.16s ease, background-color 0.16s ease;
}

.page-faq .faq-toc__num {
  min-width: 2.2em;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted-sage);
}

.page-faq .faq-toc__link:hover {
  border-left-color: var(--steel-blue);
  background: var(--panel-moss);
}

.page-faq .faq-toc__link:focus-visible {
  outline: 2px solid var(--steel-blue);
  outline-offset: -2px;
  border-left-color: var(--steel-blue);
}

.page-faq .faq-toc__foot {
  margin: 10px 16px 0;
  padding-top: 10px;
  border-top: var(--line);
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--muted-sage);
}

/* ---- 区块 ---- */
.page-faq .faq-block {
  padding: clamp(18px, 2.6vw, 34px);
  border: var(--line);
  background: var(--pitch-forest);
  border-radius: var(--radius);
  box-shadow: 0 18px 40px -38px rgba(0, 0, 0, 0.95);
}

.page-faq .faq-block__head {
  margin: 0 0 clamp(16px, 2.2vw, 24px);
  padding-bottom: 14px;
  border-bottom: var(--line);
}

.page-faq .faq-block__label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--steel-blue);
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(19px, 2.6vw, 28px);
  line-height: 1.22;
  letter-spacing: 0.01em;
  color: var(--paper-bone);
}

/* ---- 三种入口 ---- */
.page-faq .faq-paths {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-path {
  position: relative;
  padding: 16px 16px 18px;
  border: var(--line);
  background: var(--carbon-ink);
  border-radius: var(--radius);
  transition: border-color 0.16s ease;
}

.page-faq .faq-path::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 34px;
  background: var(--steel-blue);
}

.page-faq .faq-path:hover {
  border-color: var(--panel-moss);
}

.page-faq .faq-path__idx {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--steel-blue);
}

.page-faq .faq-path__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--paper-bone);
}

.page-faq .faq-path__text {
  margin: 0;
  font-size: 14px;
  color: var(--muted-sage);
}

/* ---- 旁注与刻度 ---- */
.page-faq .faq-note {
  margin: 16px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--steel-blue);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted-sage);
}

.page-faq .faq-metrics-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 22px);
  margin-bottom: clamp(16px, 2.2vw, 26px);
}

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

.page-faq .faq-media .media__cap {
  font-size: 12px;
  line-height: 1.55;
}

.page-faq .faq-scale {
  margin: 0;
  padding: 14px 16px 10px;
  border: var(--line);
  background: var(--carbon-ink);
  border-radius: var(--radius);
}

.page-faq .faq-scale svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-scale__ticks rect {
  fill: var(--pitch-forest);
  stroke: var(--hairline);
  stroke-width: 1;
}

.page-faq .faq-scale__ticks rect:nth-child(4),
.page-faq .faq-scale__ticks rect:nth-child(5),
.page-faq .faq-scale__ticks rect:nth-child(6) {
  fill: var(--panel-moss);
}

.page-faq .faq-scale__labels text {
  fill: var(--muted-sage);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-faq .faq-scale__cap {
  margin: 10px 0 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel-blue);
}

/* ---- 问答条目 ---- */
.page-faq .qa-list {
  display: grid;
  gap: 12px;
}

.page-faq .qa {
  padding: clamp(14px, 2vw, 20px) clamp(14px, 2vw, 22px);
  border: var(--line);
  border-left: 2px solid var(--panel-moss);
  background: linear-gradient(180deg, rgba(27, 58, 47, 0.55), rgba(13, 20, 18, 0.35));
  border-radius: var(--radius);
  transition: border-color 0.16s ease;
}

.page-faq .qa:hover {
  border-color: var(--panel-moss);
  border-left-color: var(--steel-blue);
}

.page-faq .qa__q {
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(15.5px, 2vw, 17.5px);
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--paper-bone);
}

.page-faq .qa__idx {
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--steel-blue);
}

.page-faq .qa__a {
  margin: 0;
  max-width: 74ch;
  font-size: 14.5px;
  line-height: 1.66;
  color: var(--paper-bone);
}

.page-faq .qa__key {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.12em;
  color: var(--paper-bone);
  border-bottom: 1px solid var(--steel-blue);
  padding-bottom: 1px;
}

.page-faq .qa__more {
  margin-top: 12px;
  padding-top: 8px;
  border-top: 1px dashed var(--hairline);
}

.page-faq .qa__more[open] {
  border-top-color: var(--steel-blue);
}

.page-faq .qa__more > summary {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 2px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--steel-blue);
}

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

.page-faq .qa__more > summary::before {
  content: "+";
  font-size: 13px;
  line-height: 1;
  color: var(--steel-blue);
}

.page-faq .qa__more[open] > summary::before {
  content: "−";
}

.page-faq .qa__more > summary:focus-visible {
  outline: 2px solid var(--steel-blue);
  outline-offset: 3px;
  border-radius: 1px;
}

.page-faq .qa__more-body {
  padding-top: 8px;
}

.page-faq .qa__more-body p {
  margin: 0;
  max-width: 72ch;
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--muted-sage);
}

/* ---- 筛选区错位布局 ---- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
}

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

/* ---- 仍未解决 ---- */
.page-faq .faq-block--contact {
  border-color: var(--panel-moss);
  background: linear-gradient(160deg, var(--pitch-forest) 0%, var(--carbon-ink) 78%);
}

.page-faq .faq-handoff__text {
  margin: 0 0 14px;
  max-width: 70ch;
  font-size: 15px;
  color: var(--paper-bone);
}

.page-faq .faq-handoff__list {
  display: grid;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-handoff__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--muted-sage);
}

.page-faq .faq-handoff__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 1px;
  background: var(--steel-blue);
}

.page-faq .faq-handoff__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
}

.page-faq .faq-handoff__aside {
  margin: 12px 0 0;
  font-size: 13.5px;
  color: var(--muted-sage);
}

.page-faq .faq-handoff__aside a {
  color: var(--steel-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-handoff__aside a:focus-visible {
  outline: 2px solid var(--steel-blue);
  outline-offset: 3px;
}

/* ---- 响应式 ---- */
@media (min-width: 720px) {
  .page-faq .faq-paths {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-metrics-intro {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-split__media {
    position: sticky;
    top: calc(var(--frame-top, 124px) + 16px);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--frame-top, 124px) + 16px);
    max-height: calc(100vh - var(--frame-top, 124px) - 32px);
    overflow-y: auto;
  }
}

@media (max-width: 420px) {
  .page-faq .qa__q {
    flex-direction: column;
    gap: 4px;
  }

  .page-faq .faq-hero__actions .btn,
  .page-faq .faq-handoff__actions .btn {
    width: 100%;
    text-align: center;
  }
}

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