/* ===== 知识索引页 · 页面专属样式 ===== */
.page-faq {
  --faq-shell: min(1520px, 94vw);
  --faq-index-col: 28px;
  position: relative;
  padding-bottom: calc(var(--bar-h) + 88px);
  background: var(--ink-900);
  color: var(--paper);
}

/* ---- 面包屑 ---- */
.page-faq .breadcrumb {
  width: var(--faq-shell);
  margin: 0 auto;
  padding-top: calc(var(--header-h) + 24px);
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--graphite);
}

.page-faq .breadcrumb__link {
  color: var(--mist);
  text-decoration: none;
  transition: color .2s ease;
}

.page-faq .breadcrumb__link:hover,
.page-faq .breadcrumb__link:focus-visible {
  color: var(--cyan);
}

/* ---- 首屏 ---- */
.faq-hero {
  position: relative;
  overflow: hidden;
  padding: 36px 0 52px;
}

.faq-hero::before {
  content: "";
  position: absolute;
  left: -8vw;
  right: -8vw;
  top: -16%;
  height: 88%;
  background: linear-gradient(112deg, var(--ink-700) 0%, rgba(10, 42, 70, .34) 56%, transparent 92%);
  transform: skewY(-3.4deg);
  z-index: 0;
  pointer-events: none;
}

.faq-hero__inner {
  position: relative;
  z-index: 1;
  width: var(--faq-shell);
  margin: 0 auto;
  display: grid;
  gap: 22px;
}

.faq-hero h1 {
  margin: 12px 0 0;
  max-width: 18ch;
  font-size: clamp(2rem, 1.3rem + 3.1vw, 3.375rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.02em;
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper);
  opacity: .84;
}

.faq-hero__side {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--graphite);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 2.1;
  letter-spacing: .08em;
  color: var(--mist);
}

@media (min-width: 960px) {
  .faq-hero {
    padding: 52px 0 68px;
  }
  .faq-hero__inner {
    grid-template-columns: minmax(0, 9fr) minmax(0, 3fr);
    align-items: end;
    gap: 48px;
  }
  .faq-hero__side {
    text-align: left;
    padding-bottom: 8px;
  }
}

/* ---- 主体：左窄目录 + 右宽问答 ---- */
.faq-body {
  width: var(--faq-shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  padding-top: 12px;
}

.faq-rail {
  display: grid;
  gap: 16px;
}

.faq-rail__note {
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--hairline);
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .toc__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist);
}

.page-faq .toc__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
  counter-reset: faq-toc;
}

.page-faq .toc__list li {
  counter-increment: faq-toc;
}

.page-faq .toc__link {
  display: block;
  padding: 8px 0 8px 30px;
  position: relative;
  color: var(--mist);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  border-left: 2px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.page-faq .toc__link::before {
  content: counter(faq-toc, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--graphite);
}

.page-faq .toc__link:hover,
.page-faq .toc__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--hairline);
}

.page-faq .toc__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-faq .toc__link[aria-current="true"]::before {
  color: var(--cyan);
}

@media (min-width: 900px) {
  .faq-body {
    grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
    gap: 56px;
    align-items: start;
  }
  .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

/* ---- 章节骨架：竖排编号轨 + 内容 ---- */
.faq-main {
  display: grid;
  gap: 4px;
}

.faq-section {
  display: grid;
  grid-template-columns: var(--faq-index-col) minmax(0, 1fr);
  column-gap: 14px;
  padding: 40px 0;
  border-top: 1px solid var(--hairline);
}

.faq-section:first-child {
  border-top: 0;
  padding-top: 4px;
}

.faq-section__index {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .34em;
  color: var(--cyan);
  opacity: .78;
  padding-top: 4px;
}

.faq-section__title {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 1.1rem + 1.5vw, 2.25rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.02em;
}

.faq-section__lede {
  margin: 0 0 26px;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

@media (min-width: 760px) {
  .faq-section {
    column-gap: 24px;
    padding: 56px 0;
  }
}

/* ---- 问答手风琴 ---- */
.qa {
  border-bottom: 1px solid var(--hairline);
}

.qa:first-of-type {
  border-top: 1px solid var(--hairline);
}

.qa__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
  transition: color .2s ease;
}

.qa__q::-webkit-details-marker {
  display: none;
}

.qa__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: transform .24s ease;
}

.qa[open] > .qa__q::after {
  content: "−";
  transform: translateY(-1px);
}

.qa__q:hover,
.qa__q:focus-visible {
  color: var(--cyan);
}

.qa__no {
  flex: none;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.qa[open] .qa__no {
  color: var(--orange);
}

.qa__a {
  margin-left: 44px;
  padding: 0 0 22px 18px;
  max-width: 44ch;
  border-left: 2px solid var(--hairline);
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.qa__a p {
  margin: 0;
}

.qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 230, 214, .4);
}

.qa__a a:hover {
  border-bottom-color: var(--cyan);
}

@media (min-width: 760px) {
  .qa__q {
    font-size: 17px;
    padding: 22px 0;
  }
  .qa__a {
    margin-left: 52px;
    padding-left: 24px;
  }
}

/* ---- 图文错位双栏 ---- */
.faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-faq .figure__frame {
  overflow: hidden;
  border-radius: 4px;
  background: var(--ink-800);
}

.page-faq .figure__frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  transition: transform 1.2s ease;
}

.page-faq .figure:hover .figure__frame img {
  transform: scale(1.02);
}

.page-faq .figure__caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 800px) {
  .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, .8fr);
    gap: 40px;
  }
  .faq-split--portrait {
    grid-template-columns: minmax(0, .58fr) minmax(0, 1.42fr);
  }
}

/* ---- 分维度查询列表 ---- */
.dim-list {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.dim {
  position: relative;
  padding: 20px 0 20px 20px;
  border-top: 1px solid var(--hairline);
}

.dim:last-child {
  border-bottom: 1px solid var(--hairline);
}

.dim::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 3px;
  height: 16px;
  background: var(--cyan);
}

.dim:nth-child(2)::before {
  background: var(--orange);
}

.dim:nth-child(3)::before {
  background: var(--grass);
}

.dim:nth-child(4)::before {
  background: var(--amber);
}

.dim__title {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .1em;
  color: var(--paper);
}

.dim__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

@media (min-width: 900px) {
  .dim-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 44px;
  }
  .dim {
    padding: 24px 0 24px 22px;
  }
}

/* ---- 更新节奏对照条 ---- */
.cadence {
  margin: 0;
  padding: 22px 0 6px;
  border-top: 2px solid var(--ink-700);
  border-bottom: 1px solid var(--hairline);
  background: linear-gradient(180deg, rgba(18, 60, 96, .38) 0%, rgba(4, 22, 42, 0) 72%);
}

.page-faq .cadence__head {
  margin: 0 0 6px;
  color: var(--mist);
}

.cadence__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.cadence__row {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 4px 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--hairline);
}

.cadence__row:last-child {
  border-bottom: 0;
}

.cadence__name {
  font-size: 14px;
  font-weight: 700;
  color: var(--paper);
}

.cadence__when {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--cyan);
}

.cadence__tip {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 800px) {
  .cadence__row {
    grid-template-columns: auto minmax(0, 1fr) auto;
    padding: 16px 0;
  }
  .cadence__when {
    grid-column: 3;
    text-align: right;
  }
  .cadence__tip {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% - 1px);
    margin: 0;
    padding: 10px 14px;
    background: var(--ink-700);
    border-left: 3px solid var(--cyan);
    box-shadow: var(--shadow-card);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity .2s ease, transform .2s ease, visibility .2s;
    z-index: 4;
  }
  .cadence__row:hover .cadence__tip,
  .cadence__row:focus-within .cadence__tip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}

.faq-inline-link {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.faq-inline-link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 230, 214, .4);
}

.faq-inline-link a:hover {
  border-bottom-color: var(--cyan);
}

/* ---- 纠错面板 ---- */
.fix-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 6px;
  padding: 26px 22px;
  border-radius: 6px;
  background: var(--ink-800);
  border-left: 3px solid var(--orange);
}

.fix-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}

.fix-step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.fix-step__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--orange);
  padding-top: 2px;
}

.fix-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.fix-contact {
  display: grid;
  gap: 12px;
  align-content: start;
}

.fix-contact .label {
  margin: 0;
  color: var(--mist);
}

.page-faq .contact-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .contact-list__item {
  display: grid;
  gap: 2px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .contact-list__label {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-faq .contact-list__value {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.fix-contact .note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.fix-contact .btn {
  justify-self: start;
  margin-top: 4px;
}

@media (min-width: 860px) {
  .fix-panel {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 44px;
    padding: 32px 30px;
  }
}

/* ---- 返回顶部 ---- */
.page-faq .to-top {
  position: fixed;
  right: 20px;
  bottom: calc(var(--bar-h) + 18px);
  z-index: 40;
  padding: 10px 16px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  background: var(--ink-800);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: .12em;
  cursor: pointer;
}

.page-faq .to-top:hover,
.page-faq .to-top:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ---- 动效降级 ---- */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
  .page-faq .figure:hover .figure__frame img {
    transform: none;
  }
}
</main>