/* ===== 帮助中心 page-faq ===== */
.page-faq {
  --faq-index-w: 228px;
  --faq-gap: clamp(20px, 3vw, 44px);
  color: var(--ink-black);
}

/* 面包屑与首屏 */
.page-faq .breadcrumb {
  padding-block: 18px 0;
}

.page-faq .faq-hero {
  margin-top: 18px;
  border-top: 1px solid var(--ink-900);
  border-bottom: 1px solid var(--line);
  background-color: var(--paper-100);
  background-image:
    linear-gradient(to right, rgba(12, 31, 46, .05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(12, 31, 46, .05) 1px, transparent 1px);
  background-size: 24px 24px;
  padding-block: clamp(30px, 5vw, 60px);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 20px;
}

.page-faq .faq-hero__note {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--brass-500);
}

.page-faq .faq-hero__text h1 {
  margin: 10px 0 0;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--ink-900);
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: clamp(15.5px, 1.6vw, 17.5px);
  line-height: 1.78;
  color: var(--ink-700);
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 28px;
}

.page-faq .faq-stats__item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-faq .faq-stats .num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1;
  color: var(--brass-500);
}

.page-faq .faq-stats__label {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--ink-700);
}

@media (min-width: 860px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: 34px minmax(0, 1fr) 220px;
    gap: 32px;
    align-items: start;
  }
  .page-faq .faq-hero__note {
    writing-mode: vertical-rl;
    letter-spacing: .26em;
    padding-top: 4px;
  }
  .page-faq .faq-stats {
    flex-direction: column;
    gap: 20px;
    border-left: 1px solid var(--line);
    padding-left: 20px;
  }
}

/* 主体两栏 */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  padding-block: clamp(28px, 5vw, 56px);
}

@media (min-width: 900px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 92px;
  }
}

/* 场景索引 */
.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--brass-500);
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border-left: 2px solid var(--line);
  color: var(--ink-700);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-index__link .num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--brass-500);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--paper-300);
  border-left-color: var(--brass-500);
  color: var(--ink-900);
}

.page-faq .faq-index__hint {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-700);
  opacity: .82;
}

@media (max-width: 899px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .page-faq .faq-index__list {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: 68%;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    padding-bottom: 8px;
  }
  .page-faq .faq-index__item {
    scroll-snap-align: start;
  }
}

/* 场景区块 */
.page-faq .faq-scene {
  scroll-margin-top: 96px;
  padding-block: clamp(26px, 4vw, 46px);
  border-top: 1px solid var(--ink-900);
}

.page-faq .faq-scene:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-scene__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.page-faq .faq-scene__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.2;
  letter-spacing: .06em;
  padding: 4px 7px;
  background: var(--ink-900);
  color: var(--paper-100);
}

.page-faq .faq-scene__title {
  margin: 0 0 6px;
  font-size: clamp(21px, 2.6vw, 29px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--ink-900);
}

.page-faq .faq-scene__lede {
  margin: 0;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-700);
}

/* 图版 */
.page-faq .faq-figure {
  margin: 24px 0;
  border: 1px solid var(--ink-900);
  background: var(--paper-100);
}

.page-faq .faq-figure__frame {
  overflow: hidden;
  border-bottom: 1px solid var(--ink-900);
}

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

.page-faq .faq-figure__cap {
  display: flex;
  gap: 10px;
  padding: 10px 13px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--ink-700);
}

.page-faq .faq-figure__tag {
  flex: 0 0 auto;
  padding-top: 1px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--brass-500);
}

@media (min-width: 760px) {
  .page-faq .faq-figure {
    max-width: 470px;
    margin-left: auto;
    margin-right: 0;
  }
}

/* 比例自查示意 */
.page-faq .scale-check {
  margin: 22px 0;
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--paper-100);
}

.page-faq .scale-check__title {
  margin: 0 0 12px;
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--brass-500);
}

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

.page-faq .sc-frame {
  fill: none;
  stroke: var(--ink-900);
  stroke-width: 2;
}

.page-faq .sc-frame--bad {
  stroke: var(--signal);
}

.page-faq .sc-bar {
  fill: var(--brass-500);
}

.page-faq .sc-bar--bad {
  fill: var(--signal);
  opacity: .85;
}

.page-faq .sc-line {
  fill: var(--line);
}

.page-faq .sc-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
}

.page-faq .sc-label--ok {
  fill: var(--celadon);
}

.page-faq .sc-label--bad {
  fill: var(--signal);
}

@media (min-width: 640px) {
  .page-faq .scale-check {
    padding: 20px 22px;
  }
}

/* 问答手风琴 */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

.page-faq .qa {
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease);
}

.page-faq .qa > summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 16px 46px 16px 20px;
  font-size: 15.5px;
  line-height: 1.55;
  font-weight: 500;
  color: var(--ink-900);
  transition: background var(--dur) var(--ease);
}

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

.page-faq .qa > summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: transparent;
  transition: background var(--dur) var(--ease);
}

.page-faq .qa > summary::after {
  content: "+";
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--brass-500);
}

.page-faq .qa > summary:hover {
  background: var(--paper-300);
}

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

.page-faq .qa[open] {
  background: var(--paper-300);
}

.page-faq .qa[open] > summary::before {
  background: var(--brass-500);
}

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

.page-faq .qa__a {
  padding: 0 46px 18px 20px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-700);
}

.page-faq .qa__a p {
  margin: 0;
}

.page-faq .qa__a a {
  color: var(--ink-900);
  text-decoration: underline;
  text-decoration-color: var(--brass-500);
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.page-faq .qa__a a:hover {
  color: var(--brass-500);
}

/* 尾部咨询带 */
.page-faq .faq-help {
  background-color: var(--ink-900);
  background-image: radial-gradient(rgba(184, 122, 61, .18) 1px, transparent 1px);
  background-size: 12px 12px;
  color: var(--paper-100);
  padding-block: clamp(36px, 5vw, 64px);
}

.page-faq .faq-help__inner {
  display: grid;
  gap: 24px;
}

.page-faq .faq-help h2 {
  margin: 8px 0 12px;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--paper-100);
}

.page-faq .faq-help p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--brass-200);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 22px;
}

.page-faq .faq-help__link {
  color: var(--paper-100);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid var(--brass-500);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-help__link:hover,
.page-faq .faq-help__link:focus-visible {
  color: var(--brass-200);
  border-bottom-color: var(--brass-200);
}

@media (min-width: 820px) {
  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa > summary,
  .page-faq .qa > summary::before,
  .page-faq .faq-index__link,
  .page-faq .qa__a a,
  .page-faq .faq-help__link {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>