.page-faq {
  --faq-rule: rgba(62, 90, 122, 0.55);
  background-color: var(--ink-900);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.75;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 30px 0 clamp(44px, 8vw, 76px);
  border-bottom: 3px solid var(--gold);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-faq .faq-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
}

.page-faq .faq-hero__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(110% 80% at 15% 0%, rgba(23, 41, 63, 0.55), rgba(11, 21, 36, 0.95) 72%),
    linear-gradient(180deg, rgba(11, 21, 36, 0.5) 0%, var(--ink-900) 94%);
}

.page-faq .faq-hero > .container {
  position: relative;
  z-index: 2;
}

.page-faq .faq-crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.page-faq .faq-crumbs a {
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .faq-crumbs a:hover,
.page-faq .faq-crumbs a:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

.page-faq .faq-crumbs [aria-current="page"] {
  color: var(--gold);
}

.page-faq .faq-hero__eyebrow {
  margin: clamp(20px, 4vw, 34px) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.18;
  letter-spacing: 0.02em;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 660px;
  font-size: clamp(15px, 2.3vw, 17px);
  color: var(--text-secondary);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: 30px;
  padding-block: 36px 76px;
}

/* ---------- 目录锚点 ---------- */
.page-faq .faq-toc {
  border: 2px solid var(--grid-blue);
  background: var(--ink-800);
  padding: 14px 14px 12px;
}

.page-faq .faq-toc__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--text-secondary);
}

.page-faq .faq-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
}

.page-faq .faq-toc__item {
  flex: 0 0 auto;
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 10px;
  border-left: 2px solid transparent;
  color: var(--text-secondary);
  font-size: 13.5px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--gold-bright);
  border-left-color: var(--gold);
  background: var(--ink-700);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

/* ---------- 章节 ---------- */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-sec {
  padding: 0 0 44px;
  scroll-margin-top: 88px;
}

.page-faq .faq-sec + .faq-sec {
  padding-top: 42px;
  border-top: 2px solid var(--grid-blue);
}

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

.page-faq .faq-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 18px;
  margin-bottom: 26px;
}

.page-faq .faq-sec__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(36px, 7vw, 58px);
  line-height: 0.82;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-faq .faq-sec__kicker {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--text-secondary);
}

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3.8vw, 27px);
  line-height: 1.34;
}

.page-faq .faq-sec__desc {
  margin: 10px 0 0;
  max-width: 640px;
  font-size: 15px;
  color: var(--text-secondary);
}

/* ---------- 三步路径 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 14px;
}

.page-faq .faq-step {
  border: 3px solid var(--grid-blue);
  background: var(--ink-700);
  padding: 20px 18px 18px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.page-faq .faq-step:hover,
.page-faq .faq-step:focus-within {
  border-color: var(--gold);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-faq .faq-step__title {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.4;
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 14.5px;
  color: var(--text-secondary);
}

.page-faq .faq-step__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 12px;
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--grid-blue);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  opacity: 0.72;
  transition: opacity 0.18s ease, color 0.18s ease;
}

.page-faq .faq-step:hover .faq-step__meta,
.page-faq .faq-step:focus-within .faq-step__meta {
  opacity: 1;
  color: var(--gold-bright);
}

.page-faq .faq-step__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--gold);
  text-decoration: none;
}

.page-faq .faq-step__link::after {
  content: "›";
  font-size: 15px;
  line-height: 1;
}

.page-faq .faq-step__link:hover,
.page-faq .faq-step__link:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

/* ---------- 字段读法 ---------- */
.page-faq .faq-fields {
  display: grid;
  gap: 26px;
}

.page-faq .faq-field {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 14px 16px;
  background: var(--ink-800);
  border-left: 4px solid var(--gold);
}

.page-faq .faq-field + .faq-field {
  margin-top: 10px;
}

.page-faq .faq-field__key {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-faq .faq-field__name {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 16px;
}

.page-faq .faq-field__desc {
  margin: 0;
  font-size: 14.5px;
  color: var(--text-secondary);
}

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

.page-faq .faq-figure__frame {
  border: 3px solid var(--grid-blue);
  background: var(--ink-700);
  aspect-ratio: 11 / 8;
  overflow: hidden;
  box-shadow: var(--shadow-hard);
}

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

.page-faq .faq-figure__cap {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-qa {
  border: 2px solid var(--grid-blue);
  border-left-width: 3px;
  background: var(--ink-700);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-qa + .faq-qa {
  margin-top: 10px;
}

.page-faq .faq-qa[open] {
  border-left-color: var(--gold);
  background: var(--ink-800);
}

.page-faq .faq-qa > summary {
  position: relative;
  display: block;
  padding: 15px 18px 15px 48px;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--text-primary);
}

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

.page-faq .faq-qa > summary::before {
  content: "+";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--gold);
}

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

.page-faq .faq-qa > summary:hover {
  color: var(--gold-bright);
}

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

.page-faq .faq-qa__body {
  padding: 0 18px 18px 48px;
  font-size: 14.5px;
  color: var(--text-secondary);
}

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

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

.page-faq .faq-qa__body a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(217, 164, 65, 0.45);
}

.page-faq .faq-qa__body a:hover,
.page-faq .faq-qa__body a:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

/* ---------- 概念对照 ---------- */
.page-faq .faq-concepts {
  border: 2px solid var(--grid-blue);
  background: var(--table-base);
}

.page-faq .faq-concept {
  display: grid;
  gap: 4px 20px;
  padding: 16px 18px;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-concept:first-child {
  border-top: 0;
}

.page-faq .faq-concept:nth-child(even) {
  background: rgba(11, 21, 36, 0.42);
}

.page-faq .faq-concept__term {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--gold);
}

.page-faq .faq-concept__desc {
  margin: 0;
  font-size: 14.5px;
  color: var(--text-secondary);
}

.page-faq .faq-note {
  margin: 16px 0 0;
  padding: 14px 18px;
  border-left: 3px solid var(--accent-cool);
  background: rgba(79, 179, 168, 0.1);
  font-size: 14.5px;
  color: var(--text-secondary);
}

/* ---------- 检索问答 ---------- */
.page-faq .faq-checks {
  display: grid;
  gap: 12px;
}

.page-faq .faq-check {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 16px 18px;
  border: 2px solid var(--grid-blue);
  background: var(--ink-800);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-faq .faq-check:hover {
  border-color: var(--cinnabar);
  transform: translateX(3px);
}

.page-faq .faq-check__no {
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.3;
  letter-spacing: 0.04em;
  color: var(--cinnabar);
}

.page-faq .faq-check__q {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.4;
}

.page-faq .faq-check__a {
  margin: 0;
  font-size: 14.5px;
  color: var(--text-secondary);
}

/* ---------- 联系区 ---------- */
.page-faq .faq-help {
  padding: 24px 20px;
  border: 3px solid var(--gold);
  background: linear-gradient(155deg, var(--ink-800) 0%, var(--ink-700) 100%);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-help__line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(217, 164, 65, 0.35);
}

.page-faq .faq-help__label {
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-secondary);
}

.page-faq .faq-help__value {
  font-family: var(--font-mono);
  font-size: clamp(15px, 3.2vw, 18px);
  color: var(--gold-bright);
  word-break: break-all;
}

.page-faq .faq-help__tips {
  display: grid;
  gap: 9px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__tips li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  color: var(--text-secondary);
}

.page-faq .faq-help__tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 2px;
  background: var(--gold);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--faq-rule);
}

/* ---------- 宽屏布局 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-concept {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-fields {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 32px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: 212px minmax(0, 1fr);
    gap: 56px;
    padding-block: 52px 104px;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 88px;
    padding: 18px 16px;
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-faq .faq-toc__link {
    white-space: normal;
  }
}

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

  .page-faq .faq-step:hover,
  .page-faq .faq-step:focus-within,
  .page-faq .faq-check:hover {
    transform: none;
  }
}