.page-faq {
  --faq-rule: var(--line-gold);
  background: var(--porcelain);
  color: var(--ink);
  overflow-x: hidden;
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: clamp(14px, 2.4vw, 22px) 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--stone);
}
.page-faq .breadcrumb a {
  color: var(--turquoise);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}
.page-faq .breadcrumb__sep { color: var(--gold); }

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 3vw, 34px) 0 clamp(28px, 4.5vw, 52px);
  border-bottom: 1px solid var(--faq-rule);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(54% 92% at 8% 0%, rgba(200, 154, 75, .20), transparent 68%),
    radial-gradient(42% 78% at 98% 12%, rgba(178, 58, 46, .10), transparent 72%);
}
.page-faq .faq-hero > * { position: relative; }

.page-faq .faq-hero h1 {
  margin: clamp(12px, 2vw, 20px) 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(30px, 6.2vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  max-width: 16ch;
}
.page-faq .faq-hero__lead {
  margin: clamp(14px, 2.4vw, 22px) 0 0;
  max-width: 60ch;
  font-family: var(--font-sans);
  font-size: clamp(15.5px, 1.6vw, 17.5px);
  line-height: 1.85;
  color: var(--ink);
}
.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 0;
  margin-top: clamp(16px, 2.6vw, 26px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--stone);
}
.page-faq .faq-hero__meta span {
  padding: 4px 12px;
  border-left: 1px solid var(--gold);
}
.page-faq .faq-hero__meta span:first-child { border-left: 0; padding-left: 0; }

/* ---------- 研究板骨架 ---------- */
.page-faq .faq-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  padding: clamp(24px, 4vw, 44px) 0 clamp(52px, 8vw, 100px);
}

/* 左侧索引 */
.page-faq .faq-rail {
  border-top: 2px solid var(--cinnabar);
  border-bottom: 1px solid var(--faq-rule);
  padding: 14px 0 18px;
}
.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cinnabar);
}
.page-faq .faq-rail__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
}
.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 2px;
  font-family: var(--font-sans);
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(110, 106, 99, .16);
  transition: color .18s var(--ease), border-color .18s var(--ease), padding-left .18s var(--ease);
}
.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
  padding-left: 6px;
}
.page-faq .faq-rail__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--gold);
}
.page-faq .faq-rail__hint {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--stone);
}

/* ---------- 章节 ---------- */
.page-faq .faq-stream { min-width: 0; }
.page-faq .faq-sec {
  padding: clamp(26px, 4vw, 46px) 0;
  border-top: 1px solid var(--faq-rule);
  scroll-margin-top: 112px;
}
.page-faq .faq-sec:first-child { border-top: 0; padding-top: 0; }

.page-faq .faq-sec--tint {
  padding: clamp(24px, 3.6vw, 40px) clamp(16px, 3vw, 34px);
  border-top: 0;
  background: linear-gradient(180deg, rgba(169, 102, 74, .10), rgba(232, 223, 209, .34));
}
.page-faq .faq-sec--paper {
  padding: clamp(24px, 3.6vw, 40px) clamp(16px, 3vw, 34px);
  background: rgba(232, 223, 209, .48);
  border-top-color: rgba(122, 90, 46, .32);
}

.page-faq .faq-sec__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  max-width: 22ch;
}
.page-faq .faq-sec__lead {
  margin: 14px 0 0;
  max-width: 62ch;
  font-family: var(--font-sans);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--stone);
}

/* ---------- 五类场景 ---------- */
.page-faq .scenes {
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}
.page-faq .scene {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid rgba(122, 90, 46, .26);
}
.page-faq .scene:last-child { border-bottom: 1px solid rgba(122, 90, 46, .26); }
.page-faq .scene__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cinnabar);
  padding-top: 4px;
}
.page-faq .scene__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.5;
  color: var(--ink);
}
.page-faq .scene__text {
  margin: 6px 0 0;
  font-family: var(--font-sans);
  font-size: 14.8px;
  line-height: 1.78;
  color: var(--stone);
  max-width: 60ch;
}
.page-faq .scene__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0 0;
}

/* ---------- 三步 ---------- */
.page-faq .steps {
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}
.page-faq .step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0 14px 0;
  border-left: 2px solid var(--gold);
  padding-left: 14px;
  transition: border-color .2s var(--ease);
}
.page-faq .step:hover { border-left-color: var(--cinnabar); }
.page-faq .step__num {
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.1;
  letter-spacing: .04em;
  color: var(--gold);
}
.page-faq .step__body h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.45;
  color: var(--ink);
}
.page-faq .step__body p {
  margin: 6px 0 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
  max-width: 58ch;
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: clamp(20px, 3.4vw, 34px) 0 0;
  border: 1px solid var(--faq-rule);
  background: var(--paper);
  box-shadow: inset 0 0 0 1px rgba(247, 242, 232, .7);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--faq-rule);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--stone);
}
.page-faq .faq-figure--narrow { max-width: 620px; }

/* ---------- 折叠问答 ---------- */
.page-faq .qa-group {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border-top: 1px solid rgba(110, 106, 99, .34);
}
.page-faq .qa {
  border-bottom: 1px solid rgba(110, 106, 99, .34);
  transition: border-color .18s var(--ease);
}
.page-faq .qa[open] {
  border-bottom-color: var(--cinnabar);
}
.page-faq .qa__summary {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 15px 34px 15px 0;
  position: relative;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 15.8px;
  line-height: 1.6;
  color: var(--ink);
  transition: color .18s var(--ease);
}
.page-faq .qa__summary::-webkit-details-marker { display: none; }
.page-faq .qa__summary::marker { content: ""; }
.page-faq .qa__summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 13px;
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--gold);
  transition: color .18s var(--ease);
}
.page-faq .qa[open] .qa__summary { color: var(--cinnabar-deep); }
.page-faq .qa[open] .qa__summary::after { content: "–"; color: var(--cinnabar); }
.page-faq .qa__summary:hover { color: var(--cinnabar); }
.page-faq .qa__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--gold);
}
.page-faq .qa__body {
  padding: 0 34px 18px 0;
  font-family: var(--font-sans);
  font-size: 14.8px;
  line-height: 1.85;
  color: var(--ink);
}
.page-faq .qa__body p { margin: 0; max-width: 62ch; }
.page-faq .qa__body a {
  color: var(--turquoise);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 125, 116, .45);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .qa__body a:hover,
.page-faq .qa__body a:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

/* ---------- 正文字列 ---------- */
.page-faq .content-col {
  margin-top: clamp(14px, 2.4vw, 22px);
  max-width: 66ch;
}
.page-faq .content-col p {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--ink);
}
.page-faq .content-col p:last-child { margin-bottom: 0; }
.page-faq .content-col a,
.page-faq .note a {
  color: var(--turquoise);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 125, 116, .45);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .content-col a:hover,
.page-faq .content-col a:focus-visible,
.page-faq .note a:hover,
.page-faq .note a:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

/* ---------- 八类收藏 ---------- */
.page-faq .cats {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}
.page-faq .cat {
  display: grid;
  gap: 3px;
  padding: 12px 0;
  border-top: 1px solid rgba(122, 90, 46, .26);
}
.page-faq .cat:last-child { border-bottom: 1px solid rgba(122, 90, 46, .26); }
.page-faq .cat__name {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--moss);
}
.page-faq .cat__name a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 107, 87, .4);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .cat__name a:hover,
.page-faq .cat__name a:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}
.page-faq .cat__desc {
  font-family: var(--font-sans);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--stone);
}

/* ---------- 边注 ---------- */
.page-faq .note {
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 12px 0 12px 16px;
  border-left: 2px solid var(--gold);
  background: linear-gradient(90deg, rgba(200, 154, 75, .10), transparent 70%);
  max-width: 62ch;
}
.page-faq .note__title {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--bronze);
}
.page-faq .note p {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 兼容对照表 ---------- */
.page-faq .compat {
  margin: clamp(16px, 2.8vw, 24px) 0 0;
  border: 1px solid rgba(122, 90, 46, .34);
  background: var(--porcelain);
}
.page-faq .compat__scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-faq .compat table {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.65;
}
.page-faq .compat caption {
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--stone);
  border-bottom: 1px solid rgba(122, 90, 46, .34);
}
.page-faq .compat thead th {
  padding: 11px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--bronze);
  background: var(--paper);
  border-bottom: 1px solid rgba(122, 90, 46, .34);
  white-space: nowrap;
}
.page-faq .compat tbody th,
.page-faq .compat tbody td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(122, 90, 46, .22);
  color: var(--ink);
}
.page-faq .compat tbody th {
  font-weight: 700;
  white-space: nowrap;
}
.page-faq .compat tbody tr:last-child th,
.page-faq .compat tbody tr:last-child td { border-bottom: 0; }
.page-faq .compat tbody tr { transition: background-color .18s var(--ease); }
.page-faq .compat tbody tr:hover { background: rgba(232, 223, 209, .8); }
.page-faq .status {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  border-radius: 50%;
  vertical-align: baseline;
}
.page-faq .status--clay { background: var(--clay); }
.page-faq .status--turq { background: var(--turquoise); }
.page-faq .status--moss { background: var(--moss); }

.page-faq .order {
  margin: clamp(16px, 2.6vw, 22px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  max-width: 64ch;
}
.page-faq .order li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 14.8px;
  line-height: 1.8;
  color: var(--ink);
}
.page-faq .order__num {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--cinnabar);
}

/* ---------- 客服（深色收尾） ---------- */
.page-faq .faq-sec--support {
  margin-top: clamp(20px, 3vw, 32px);
  padding: clamp(28px, 4vw, 46px) clamp(18px, 3.4vw, 40px);
  background: var(--ink);
  color: var(--porcelain);
  border-top: 2px solid var(--gold);
}
.page-faq .faq-sec--support h2 { color: var(--porcelain); }
.page-faq .faq-sec--support .eyebrow { color: var(--gold); }
.page-faq .faq-sec--support .faq-sec__lead { color: rgba(247, 242, 232, .74); }
.page-faq .faq-sec--support .content-col p { color: rgba(247, 242, 232, .84); }
.page-faq .faq-sec--support .content-col a {
  color: var(--gold);
  border-bottom-color: rgba(200, 154, 75, .5);
}
.page-faq .faq-sec--support .content-col a:hover,
.page-faq .faq-sec--support .content-col a:focus-visible {
  color: #F0C578;
  border-bottom-color: #F0C578;
}

.page-faq .support__grid {
  margin: clamp(18px, 3vw, 28px) 0 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}
.page-faq .support__item {
  padding-top: 12px;
  border-top: 1px solid rgba(200, 154, 75, .42);
}
.page-faq .support__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--gold);
}
.page-faq .support__value {
  margin: 8px 0 0;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(15.5px, 2vw, 18px);
  line-height: 1.55;
  color: var(--porcelain);
  word-break: break-all;
}
.page-faq .support__value a {
  color: var(--porcelain);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 154, 75, .55);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .support__value a:hover,
.page-faq .support__value a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}
.page-faq .support__meta {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: rgba(247, 242, 232, .62);
}

.page-faq .copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}
.page-faq .copy-mail {
  appearance: none;
  border: 1px solid rgba(200, 154, 75, .65);
  background: transparent;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  padding: 7px 14px;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .copy-mail:hover,
.page-faq .copy-mail:focus-visible {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold);
}
.page-faq .copy-status {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--moss);
  min-height: 1em;
}

.page-faq .copy-mail[data-copied] {
  background: var(--moss);
  border-color: var(--moss);
  color: var(--porcelain);
}

/* ---------- 焦点可见 ---------- */
.page-faq a:focus-visible,
.page-faq button:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--turquoise);
  outline-offset: 3px;
}
.page-faq .faq-sec--support a:focus-visible,
.page-faq .faq-sec--support button:focus-visible {
  outline-color: var(--gold);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 620px) {
  .page-faq .cats { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 26px; }
  .page-faq .support__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
  .page-faq .scene { grid-template-columns: 44px minmax(0, 1fr); gap: 16px; }
  .page-faq .faq-rail__list { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 20px; }
}

@media (min-width: 920px) {
  .page-faq .faq-board {
    grid-template-columns: 206px minmax(0, 1fr);
    gap: clamp(34px, 4.6vw, 72px);
    align-items: start;
  }
  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
    border-bottom: 0;
    padding-bottom: 0;
  }
  .page-faq .faq-rail__list { grid-template-columns: minmax(0, 1fr); }
  .page-faq .faq-sec__head h2 { max-width: 26ch; }
  .page-faq .faq-sec--tint,
  .page-faq .faq-sec--paper { padding-left: clamp(22px, 2.6vw, 38px); }
}

@media (min-width: 1100px) {
  .page-faq .faq-board { grid-template-columns: 226px minmax(0, 1fr); }
  .page-faq .faq-hero h1 { max-width: 18ch; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition: none !important;
    animation: none !important;
  }
  .page-faq .faq-rail__link:hover { padding-left: 2px; }
}
<<<PAGE_CSS_END>>>