.page-faq {
  --fq-notch: 12px;
  display: block;
  color: var(--black);
  padding-block: clamp(18px, 3vw, 34px) clamp(56px, 8vw, 104px);
}

.page-faq a:focus-visible,
.page-faq button:focus-visible,
.page-faq input:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.page-faq .fq-hero {
  margin-top: clamp(14px, 2.4vw, 26px);
}

.page-faq .fq-hero__frame {
  position: relative;
  background: var(--paper-2);
  padding: clamp(24px, 4vw, 48px) clamp(20px, 3.6vw, 44px) clamp(28px, 4vw, 44px);
  clip-path: polygon(
    0 0,
    calc(100% - var(--fq-notch)) 0,
    100% var(--fq-notch),
    100% 100%,
    var(--fq-notch) 100%,
    0 calc(100% - var(--fq-notch))
  );
}

.page-faq .fq-hero__frame::before {
  content: "";
  display: block;
  height: 10px;
  border-top: 1px solid var(--ink);
  background-image: repeating-linear-gradient(90deg, var(--brass) 0 1px, transparent 1px 24px);
  margin-bottom: clamp(18px, 2.8vw, 30px);
}

.page-faq .fq-hero h1 {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(29px, 5.6vw, 60px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 10px 0 0;
  max-width: 900px;
}

.page-faq .fq-hero .lede {
  max-width: 62ch;
  margin-top: clamp(14px, 2vw, 22px);
  font-family: var(--sans-cond);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--black);
}

.page-faq .fq-keys {
  list-style: none;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: clamp(16px, 2.4vw, 24px) 0 0;
  border-top: 1px solid var(--rule-strong);
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 3vw, 44px);
}

.page-faq .fq-keys li {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gray);
  line-height: 1.5;
}

.page-faq .fq-keys .num {
  display: block;
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.1;
  margin-bottom: 2px;
}

/* ---------- 配图 ---------- */
.page-faq .fq-figure {
  margin: clamp(22px, 3.4vw, 36px) 0 0;
}

.page-faq .fq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--ink-deep);
  border: 1px solid var(--rule-strong);
}

.page-faq .fq-figure figcaption {
  display: block;
  margin-top: 10px;
  max-width: 62ch;
}

/* ---------- 区块骨架 ---------- */
.page-faq .fq-block {
  margin-top: clamp(52px, 8vw, 104px);
}

.page-faq .fq-block h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(25px, 3.4vw, 42px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
  max-width: 24ch;
}

.page-faq .fq-block__intro {
  max-width: 62ch;
  margin: clamp(14px, 2vw, 20px) 0 0;
  font-family: var(--sans-cond);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--black);
}

.page-faq .fq-block .note a {
  color: var(--ink-mid);
  text-decoration: underline;
  text-decoration-color: var(--brass);
  text-underline-offset: 3px;
}

.page-faq .fq-block--manual .note a {
  color: var(--brass-lt);
}

/* ---------- 对照表 ---------- */
.page-faq .fq-table-wrap {
  margin-top: clamp(22px, 3.4vw, 36px);
  border: 1px solid var(--rule-strong);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .fq-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-family: var(--sans-cond);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .fq-table caption {
  caption-side: bottom;
  text-align: left;
  padding: 12px 16px;
  border-top: 1px solid var(--rule);
}

.page-faq .fq-table th,
.page-faq .fq-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--rule);
}

.page-faq .fq-table thead th {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.page-faq .fq-table tbody tr:nth-child(odd) {
  background: var(--paper-2);
}

.page-faq .fq-table tbody th {
  font-weight: 700;
  color: var(--ink);
}

/* ---------- 筛选 ---------- */
.page-faq .fq-filter__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3.4vw, 34px);
}

.page-faq .fq-chip {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 10px 16px;
  border: 0;
  background: var(--paper-2);
  color: var(--ink);
  cursor: pointer;
  transition: background-color 180ms var(--ease), color 180ms var(--ease);
  clip-path: polygon(
    0 0,
    calc(100% - 8px) 0,
    100% 8px,
    100% 100%,
    8px 100%,
    0 calc(100% - 8px)
  );
}

.page-faq .fq-chip:hover {
  background: var(--ink-mid);
  color: var(--paper);
}

.page-faq .fq-chip[aria-pressed="true"] {
  background: var(--ink);
  color: var(--brass-lt);
}

/* ---------- 问答 ---------- */
.page-faq .fq-qa {
  list-style: none;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
  border-top: 1px solid var(--rule-strong);
}

.page-faq .fq-qa__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: clamp(18px, 2.8vw, 28px) 0;
  border-bottom: 1px solid var(--rule);
}

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

.page-faq .fq-qa__num {
  justify-self: start;
  align-self: start;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 5px 9px;
  background: var(--ink);
  color: var(--brass-lt);
  clip-path: polygon(
    0 0,
    calc(100% - 6px) 0,
    100% 6px,
    100% 100%,
    6px 100%,
    0 calc(100% - 6px)
  );
}

.page-faq .fq-qa__q {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.45;
  color: var(--ink);
}

.page-faq .fq-qa__a {
  margin: 10px 0 0;
  max-width: 68ch;
  font-family: var(--sans-cond);
  font-size: 16px;
  line-height: 1.8;
  color: var(--black);
}

/* ---------- 人工介入（深色带） ---------- */
.page-faq .fq-block--manual {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(40px, 6vw, 76px) clamp(20px, 3.6vw, 44px);
  clip-path: polygon(
    0 0,
    calc(100% - 20px) 0,
    100% 20px,
    100% 100%,
    20px 100%,
    0 calc(100% - 20px)
  );
}

.page-faq .fq-block--manual .eyebrow {
  color: var(--brass-lt);
}

.page-faq .fq-block--manual h2 {
  color: var(--paper);
}

.page-faq .fq-block--manual .fq-block__intro {
  color: var(--paper-2);
}

.page-faq .fq-manual {
  list-style: none;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2.2vw, 22px);
}

.page-faq .fq-manual__item {
  background: var(--ink-deep);
  border-left: 3px solid var(--brass);
  padding: clamp(18px, 2.6vw, 26px);
}

.page-faq .fq-manual__idx {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--brass-lt);
}

.page-faq .fq-manual__item h3 {
  margin: 12px 0 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.4;
  color: var(--paper);
}

.page-faq .fq-manual__item p {
  margin: 8px 0 0;
  font-family: var(--sans-cond);
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-2);
}

.page-faq .fq-callout {
  margin-top: clamp(24px, 3.6vw, 38px);
  padding: clamp(20px, 3vw, 30px);
  border: 1px dashed var(--rule-invert);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px 32px;
}

.page-faq .fq-callout p {
  margin: 0;
  max-width: 56ch;
  font-family: var(--sans-cond);
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper-2);
}

.page-faq .fq-callout p a {
  color: var(--brass-lt);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 排查清单 ---------- */
.page-faq .fq-check {
  list-style: none;
  margin: clamp(22px, 3.4vw, 36px) 0 0;
  padding: 0;
  border-top: 1px solid var(--rule-strong);
}

.page-faq .fq-check__item {
  border-bottom: 1px solid var(--rule);
}

.page-faq .fq-check__label {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: clamp(16px, 2.4vw, 22px) clamp(6px, 1vw, 12px);
  cursor: pointer;
  font-family: var(--sans-cond);
  font-size: 16px;
  line-height: 1.75;
  color: var(--black);
  transition: background-color 180ms var(--ease);
}

.page-faq .fq-check__label:hover {
  background: var(--paper-2);
}

.page-faq .fq-check__box {
  appearance: none;
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  margin: 3px 0 0;
  border: 1px solid var(--rule-strong);
  background: var(--paper);
  display: grid;
  place-content: center;
  cursor: pointer;
  transition: background-color 180ms var(--ease), border-color 180ms var(--ease);
  clip-path: polygon(
    0 0,
    calc(100% - 6px) 0,
    100% 6px,
    100% 100%,
    6px 100%,
    0 calc(100% - 6px)
  );
}

.page-faq .fq-check__box::after {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--brass);
  transform: scale(0);
  transition: transform 180ms var(--ease);
}

.page-faq .fq-check__box:checked {
  background: var(--ink);
  border-color: var(--ink);
}

.page-faq .fq-check__box:checked::after {
  transform: scale(1);
}

.page-faq .fq-check__text strong {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-mid);
  margin-bottom: 4px;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-faq .fq-qa__item {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: clamp(16px, 3vw, 36px);
  }

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

  .page-faq .fq-check__label {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 18px;
  }
}

@media (min-width: 1040px) {
  .page-faq .fq-hero__frame {
    padding-right: clamp(60px, 8vw, 110px);
  }

  .page-faq .fq-block h2 {
    max-width: 22ch;
  }
}

@media (max-width: 620px) {
  .page-faq .fq-keys {
    gap: 14px 22px;
  }

  .page-faq .fq-keys li {
    flex: 1 1 40%;
  }

  .page-faq .fq-callout {
    flex-direction: column;
    align-items: stretch;
  }

  .page-faq .fq-callout .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}