.page-faq {
  --faq-rail: 240px;
  --faq-gap: clamp(30px, 5vw, 78px);
  --faq-scope: clamp(24px, 4vw, 44px);
  color: var(--brown);
  background: var(--paper);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-faq .breadcrumb {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: clamp(20px, 4vw, 44px) 0 clamp(22px, 3vw, 34px);
  max-width: 78ch;
}

.page-faq .faq-hero-mark {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--copper);
  text-transform: uppercase;
}

.page-faq h1 {
  margin: 0 0 20px;
  font-family: var(--font-serif);
  font-size: clamp(32px, 5.4vw, 62px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--ink);
  max-width: 18ch;
}

.page-faq .faq-lede {
  margin: 0;
  font-size: 17px;
  line-height: 1.88;
  color: var(--brown);
  max-width: 62ch;
}

.page-faq .faq-baseline {
  margin-top: clamp(28px, 4vw, 46px);
}

.page-faq .faq-baseline-line {
  display: block;
  height: 1px;
  background: linear-gradient(90deg, var(--river) 0%, rgba(31, 111, 107, 0.34) 46%, rgba(31, 111, 107, 0) 100%);
}

.page-faq .faq-baseline-list {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  font-size: 15px;
  color: var(--ink);
}

.page-faq .faq-baseline-list li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .faq-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  padding: clamp(26px, 4vw, 44px) 0 clamp(56px, 8vw, 96px);
}

.page-faq .faq-rail {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-faq .faq-rail-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--taupe);
}

.page-faq .faq-rail-list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 2px 2px 8px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail-link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  flex: 0 0 auto;
  padding: 8px 12px;
  border: 1px solid var(--sand);
  border-radius: var(--radius);
  background: var(--card-bg);
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-rail-link:hover {
  border-color: var(--copper);
  background: var(--paper-2);
  transform: translateY(-2px);
}

.page-faq .faq-rail-link:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 2px;
}

.page-faq .faq-rail-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--taupe);
  max-width: 26ch;
}

/* ---------- 分组 ---------- */

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

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 7vw, 88px);
}

.page-faq .faq-group-head {
  border-left: 2px solid var(--river);
  padding-left: clamp(14px, 2vw, 22px);
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-group-title {
  margin: 10px 0 10px;
  font-family: var(--font-serif);
  font-size: clamp(23px, 3.1vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
}

.page-faq .faq-group-lede {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--taupe);
  max-width: 58ch;
}

/* ---------- 三步 ---------- */

.page-faq .steps-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-faq .steps-svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 720px;
}

.page-faq .steps-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--taupe);
  max-width: 62ch;
}

.page-faq .steps-list {
  margin: 0 0 clamp(26px, 4vw, 40px);
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-faq .steps-list li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 4px 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--sand);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--brown);
}

.page-faq .steps-list li strong {
  grid-column: 2;
  display: block;
  font-size: 16px;
  color: var(--ink);
}

/* ---------- 问答 ---------- */

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

.page-faq .qa {
  border-bottom: 1px solid var(--sand);
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .qa-q::before {
  content: "+";
  flex: 0 0 1em;
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--river);
}

.page-faq .qa[open] .qa-q::before {
  content: "\2212";
  color: var(--copper);
}

.page-faq .qa-q:hover {
  color: var(--river);
}

.page-faq .qa-q:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 3px;
}

.page-faq .qa-a {
  padding: 0 0 20px 1.9em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--brown);
}

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

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

/* ---------- 图片 ---------- */

.page-faq .faq-figure {
  margin: clamp(24px, 4vw, 38px) 0 0;
}

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

.page-faq .faq-figure .media-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--taupe);
}

/* ---------- 收尾深色块 ---------- */

.page-faq .faq-group--dark {
  background: var(--ink);
  color: var(--on-dark-strong);
  padding: clamp(26px, 4vw, 46px) clamp(20px, 3.4vw, 40px);
  border-radius: var(--radius);
}

.page-faq .faq-group--dark .faq-group-head {
  border-left-color: var(--beacon);
}

.page-faq .faq-group--dark .faq-code {
  color: var(--beacon);
}

.page-faq .faq-group--dark .faq-group-title {
  color: var(--on-dark-strong);
}

.page-faq .faq-group--dark .faq-group-lede {
  color: var(--on-dark);
}

.page-faq .handoff-list {
  margin: 0 0 clamp(22px, 3vw, 32px);
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-faq .handoff-list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--on-dark);
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(244, 239, 228, 0.16);
}

.page-faq .handoff-contact {
  border-top: 1px solid rgba(244, 239, 228, 0.2);
  padding-top: 20px;
}

.page-faq .handoff-mail,
.page-faq .handoff-tel {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 19px);
  letter-spacing: 0.04em;
  color: var(--on-dark-strong);
  word-break: break-all;
}

.page-faq .handoff-tel {
  color: var(--river-light);
}

.page-faq .handoff-hours {
  margin: 10px 0 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--on-dark);
}

.page-faq .handoff-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

/* ---------- 窄屏 ---------- */

@media (max-width: 420px) {
  .page-faq .steps-list li,
  .page-faq .handoff-list li {
    grid-template-columns: 1fr;
  }

  .page-faq .steps-list li strong {
    grid-column: 1;
  }

  .page-faq .qa-a {
    padding-left: 1.4em;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
    border-top: none;
    border-left: 1px solid var(--line);
    padding: 4px 0 4px 22px;
  }

  .page-faq .faq-rail-list {
    flex-direction: column;
    gap: 8px;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-rail-link {
    border-color: transparent;
    background: transparent;
    padding: 7px 10px 7px 0;
    white-space: normal;
  }

  .page-faq .faq-rail-link:hover {
    background: transparent;
    border-color: transparent;
    transform: translateX(3px);
    color: var(--river);
  }

  .page-faq .steps-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-faq .steps-list li {
    grid-template-columns: 1fr;
    border-bottom: none;
    border-top: 1px solid var(--sand);
    padding: 14px 0 0;
  }

  .page-faq .steps-list li strong {
    grid-column: 1;
    margin-top: 6px;
  }

  .page-faq .faq-figure .media-frame--wide {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail-link,
  .page-faq .qa-q {
    transition: none;
  }

  .page-faq .faq-rail-link:hover {
    transform: none;
  }
}