.page-faq {
  --faq-gap: clamp(18px, 3vw, 34px);
  --faq-item-pad: clamp(16px, 2vw, 22px);
}

.page-faq .section {
  padding-block: clamp(42px, 6vw, 78px);
}

/* 面包屑 */
.page-faq .faq-crumbs {
  padding-top: clamp(18px, 3vw, 30px);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(26px, 4.5vw, 54px) clamp(34px, 6vw, 76px);
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-hero__cut {
  position: absolute;
  top: -46px;
  right: -72px;
  width: clamp(160px, 26vw, 340px);
  height: clamp(160px, 26vw, 340px);
  background: var(--blue);
  transform: skewX(var(--skew-a)) rotate(6deg);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 46em;
}

.page-faq .faq-hero h1 {
  margin: 0.24em 0 0.5em;
  max-width: 15ch;
  color: var(--ink);
}

.page-faq .faq-hero__lead {
  max-width: 36em;
  margin: 0;
  color: var(--ink-soft);
}

.page-faq .faq-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

/* 排查路径 */
.page-faq .faq-path .section__head {
  max-width: 44em;
  margin-bottom: var(--faq-gap);
}

.page-faq .faq-board {
  margin: 0 0 var(--faq-gap);
  padding: 8px;
  border: 1px solid var(--ink);
  background: var(--paper-layer);
  line-height: 0;
}

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

.page-faq .faq-tree {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 0 var(--faq-gap);
}

.page-faq .faq-node rect {
  transition: opacity 0.2s ease;
}

.page-faq .faq-node:hover rect,
.page-faq .faq-node:focus-visible rect {
  opacity: 0.84;
}

.page-faq .faq-node:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
}

.page-faq .faq-branch {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .faq-branch__link {
  display: grid;
  gap: 6px;
  padding: 18px 20px 20px;
  background: var(--paper-layer);
  border: 1px solid var(--ink);
  border-top: 4px solid var(--red);
  color: var(--ink);
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.page-faq .faq-branch__link:nth-child(2) {
  border-top-color: var(--blue);
}

.page-faq .faq-branch__link:nth-child(3) {
  border-top-color: var(--ink);
}

.page-faq .faq-branch__link:hover,
.page-faq .faq-branch__link:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

.page-faq .faq-branch__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--red);
}

.page-faq .faq-branch__link:nth-child(2) .faq-branch__no {
  color: var(--blue);
}

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

.page-faq .faq-branch__t {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-faq .faq-branch__d {
  font-size: 14px;
  line-height: 1.6;
  opacity: 0.82;
}

/* 问答列表 */
.page-faq .faq-list-sec .section__head {
  max-width: 44em;
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-filters {
  margin-bottom: var(--faq-gap);
}

.page-faq .faq-list {
  border-top: 1px solid var(--ink);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--hair);
  scroll-margin-top: 90px;
}

.page-faq .faq-item[hidden] {
  display: none;
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.1vw, 24px);
  font-weight: 700;
  line-height: 1.36;
  letter-spacing: -0.01em;
  color: var(--ink);
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 1.05em;
  margin-top: 0.2em;
  background: var(--red);
}

.page-faq .faq-item:nth-of-type(even) .faq-q::before {
  background: var(--blue);
}

.page-faq .faq-q__t {
  flex: 1 1 auto;
}

.page-faq .faq-q__mark {
  flex: 0 0 auto;
  margin-top: 0.1em;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--ink-soft);
}

.page-faq .faq-q__mark::before {
  content: "+";
}

.page-faq .faq-item[open] .faq-q__mark::before {
  content: "\2212";
}

.page-faq .faq-item[open] .faq-q {
  color: var(--ink);
}

.page-faq .faq-a {
  max-width: 38em;
  margin-left: 20px;
  padding: 0 4px 22px 20px;
  border-left: 1px solid var(--hair);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-a p {
  margin: 0 0 0.7em;
}

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

/* 字段表 */
.page-faq .faq-fields-sec .section__head {
  max-width: 44em;
  margin-bottom: var(--faq-gap);
}

.page-faq .faq-fields {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-fields__table {
  border: 1px solid var(--ink);
}

.page-faq .faq-fields__fig {
  margin: 0;
  border: 1px solid var(--ink);
  background: var(--paper-layer);
}

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

.page-faq .faq-fields__fig figcaption {
  padding: 12px 14px;
  border-top: 1px solid var(--hair);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* 检索步骤 */
.page-faq .faq-steps-sec .section__head {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-faq .faq-steps {
  counter-reset: faqstep;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ink);
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  position: relative;
  padding: 20px 0 22px 58px;
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-steps li::before {
  content: "0" counter(faqstep);
  position: absolute;
  left: 0;
  top: 22px;
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--red);
}

.page-faq .faq-steps li:nth-child(even)::before {
  color: var(--blue);
}

.page-faq .faq-steps h3 {
  margin: 0 0 0.4em;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-steps p {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* 深色对照区 */
.page-faq .faq-compare {
  background: var(--ink);
  color: var(--paper);
}

.page-faq .faq-compare .section__head {
  max-width: 42em;
  margin-bottom: var(--faq-gap);
}

.page-faq .faq-compare .section__title {
  color: var(--paper);
}

.page-faq .faq-compare__lead {
  color: rgba(245, 240, 230, 0.78);
}

.page-faq .faq-compare__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .faq-compare__card {
  padding: 20px 22px 24px;
  background: rgba(245, 240, 230, 0.05);
  border: 1px solid var(--hair-inv);
  border-left: 5px solid var(--red);
}

.page-faq .faq-compare__card:nth-child(2) {
  border-left-color: var(--blue);
}

.page-faq .faq-compare__card--plain {
  border-left-color: var(--cyan);
}

.page-faq .faq-compare__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: rgba(245, 240, 230, 0.5);
}

.page-faq .faq-compare__card h3 {
  margin: 0.5em 0 0.2em;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-compare__v {
  margin: 0 0 0.6em;
  font-family: var(--font-mono);
  font-size: clamp(38px, 6vw, 58px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-faq .faq-compare__v span {
  margin-left: 4px;
  font-size: 0.36em;
  color: rgba(245, 240, 230, 0.6);
}

.page-faq .faq-compare__card p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(245, 240, 230, 0.78);
}

.page-faq .faq-compare__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 240, 230, 0.62);
}

.page-faq .faq-compare__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 引用与合作 */
.page-faq .faq-license .section__head p {
  margin-bottom: 1em;
}

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

.page-faq .faq-contact {
  padding: clamp(20px, 3vw, 28px);
}

.page-faq .faq-contact__list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 16px;
  margin: 1.1em 0 0;
}

.page-faq .faq-contact__list dt {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(245, 240, 230, 0.55);
}

.page-faq .faq-contact__list dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__list a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .faq-contact__list a:hover {
  text-decoration: underline;
}

.page-faq .faq-contact__note {
  margin: 1.2em 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(245, 240, 230, 0.62);
}

.page-faq .faq-contact .card__foot {
  margin: 1.3em 0 0;
}

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

  .page-faq .faq-compare__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-fields {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
  }
}

@media (max-width: 719px) {
  .page-faq .faq-hero__cut {
    top: -34px;
    right: -52px;
    width: 118px;
    height: 118px;
  }

  .page-faq .faq-hero h1 {
    max-width: none;
  }

  .page-faq .faq-tree {
    margin-bottom: clamp(14px, 4vw, 22px);
  }

  .page-faq .faq-a {
    margin-left: 12px;
    padding-left: 14px;
  }

  .page-faq .faq-steps li {
    padding-left: 46px;
  }

  .page-faq .faq-contact__list {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .page-faq .faq-contact__list dt {
    margin-top: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-node rect,
  .page-faq .faq-branch__link {
    transition: none;
  }
}