.page-faq {
  --faq-rail-w: 300px;
  --faq-pad: clamp(16px, 3.4vw, 44px);
  display: block;
  background: var(--deep-pitch);
  color: var(--line-white);
}

.page-faq .container {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-top {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(53, 224, 208, 0.12) 0%, transparent 58%),
    linear-gradient(180deg, var(--tunnel-green) 0%, var(--deep-pitch) 100%);
  border-bottom: 1px solid var(--line-mid);
}

.page-faq .faq-top::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(233, 242, 234, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(233, 242, 234, 0.055) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.page-faq .faq-top .container {
  position: relative;
  padding-block: clamp(22px, 4vw, 52px) clamp(24px, 4vw, 48px);
}

.page-faq .crumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(18px, 3vw, 32px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
}

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

.page-faq .crumbs-link:hover,
.page-faq .crumbs-link:focus-visible {
  border-bottom-color: var(--electric-cyan);
}

.page-faq .crumbs-sep,
.page-faq .crumbs-current {
  color: var(--muted-moss);
}

.page-faq .faq-hero {
  display: grid;
  gap: clamp(20px, 3.5vw, 40px);
  align-items: end;
}

.page-faq .kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.18em;
  color: var(--data-yellow);
  text-transform: uppercase;
}

.page-faq .faq-hero h1 {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 6.2vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--line-white);
}

.page-faq .lede {
  margin: 0;
  max-width: 52ch;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: rgba(233, 242, 234, 0.78);
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: clamp(16px, 2.4vw, 24px);
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: var(--fs-mono);
  color: var(--muted-moss);
}

.page-faq .faq-hero-meta .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

.page-faq .faq-hero-media {
  margin: 0;
  border: 1px solid var(--line-mid);
  background: var(--deep-pitch);
}

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

.page-faq .media-caption {
  margin: 0;
  padding: 10px 12px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.05em;
  color: var(--muted-moss);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-jump a {
  display: inline-block;
  padding: 9px 13px;
  border: 1px solid var(--line-mid);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  color: var(--line-white);
  text-decoration: none;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  border-color: var(--electric-cyan);
  color: var(--deep-pitch);
  background: var(--electric-cyan);
  outline: none;
}

/* ---------- 主体分栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  padding-block: clamp(26px, 4.5vw, 60px) clamp(40px, 6vw, 80px);
}

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

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

.page-faq .rail-list li {
  flex: 0 0 auto;
}

.page-faq .rail-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  color: var(--line-white);
  text-decoration: none;
  white-space: nowrap;
  font-size: 0.88rem;
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-faq .rail-list a:hover,
.page-faq .rail-list a:focus-visible {
  border-color: var(--electric-cyan);
  color: var(--electric-cyan);
  outline: none;
}

.page-faq .rail-list .num {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  color: var(--data-yellow);
}

.page-faq .rail-note {
  max-width: 30ch;
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--muted-moss);
}

.page-faq .faq-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(30px, 4.5vw, 56px);
  min-width: 0;
}

/* ---------- 章节头 ---------- */
.page-faq .sec-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--line-mid);
}

.page-faq .sec-no {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.5rem);
  color: var(--data-yellow);
  letter-spacing: 0.04em;
}

.page-faq .faq-sec h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 2.8vw, 1.85rem);
  line-height: 1.24;
  letter-spacing: -0.005em;
  color: var(--line-white);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0;
  list-style: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--line-white);
  transition: color 160ms var(--ease);
}

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

.page-faq .qa summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 10px;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1.25;
  color: var(--electric-cyan);
}

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

.page-faq .qa summary:hover,
.page-faq .qa[open] summary {
  color: var(--electric-cyan);
}

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

.page-faq .qnum {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  color: var(--muted-moss);
  padding-top: 4px;
}

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

.page-faq .qa-a {
  padding: 0 0 20px 34px;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(233, 242, 234, 0.76);
}

.page-faq .qa-a p {
  margin: 0 0 0.75em;
}

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

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

.page-faq .qa-a a:hover,
.page-faq .qa-a a:focus-visible {
  color: var(--data-yellow);
  outline: none;
}

.page-faq .tip {
  padding: 11px 14px;
  border-left: 3px solid var(--signal-orange);
  background: rgba(255, 90, 42, 0.09);
  font-size: 0.86rem;
  line-height: 1.75;
  color: rgba(233, 242, 234, 0.86);
}

/* ---------- 图文并列 ---------- */
.page-faq .media-aside {
  display: grid;
  gap: 16px;
  align-items: start;
  padding-bottom: 4px;
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line-soft);
}

/* ---------- 奶油纸面章节 ---------- */
.page-faq .paper-block {
  background: var(--cream-paper);
  color: var(--ink-brown-black);
  padding: var(--faq-pad);
  border-left: 4px solid var(--signal-orange);
}

.page-faq .paper-block .sec-head {
  border-bottom-color: var(--line-ink);
}

.page-faq .paper-block h2 {
  color: var(--ink-brown-black);
}

.page-faq .paper-block .sec-no {
  color: var(--signal-orange);
}

.page-faq .paper-lede {
  margin: 14px 0 18px;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(18, 16, 13, 0.78);
}

.page-faq .score-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 10px;
  background: var(--line-ink);
  border: 1px solid var(--line-ink);
}

.page-faq .score-item {
  padding: 14px;
  background: var(--cream-paper);
}

.page-faq .score-no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--signal-orange);
}

.page-faq .score-name {
  margin: 5px 0 6px;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink-brown-black);
}

.page-faq .score-desc {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: rgba(18, 16, 13, 0.7);
}

.page-faq .paper-block .qa {
  border-bottom-color: var(--line-ink);
  margin-top: 10px;
}

.page-faq .paper-block .qa summary {
  color: var(--ink-brown-black);
}

.page-faq .paper-block .qa summary::after {
  color: var(--tunnel-green);
}

.page-faq .paper-block .qa summary:hover,
.page-faq .paper-block .qa[open] summary {
  color: var(--tunnel-green);
}

.page-faq .paper-block .qa summary:focus-visible {
  outline-color: var(--tunnel-green);
}

.page-faq .paper-block .qnum {
  color: rgba(18, 16, 13, 0.45);
}

.page-faq .paper-block .qa-a {
  color: rgba(18, 16, 13, 0.8);
}

.page-faq .paper-block .qa-a a {
  color: var(--tunnel-green);
}

.page-faq .paper-block .qa-a a:hover,
.page-faq .paper-block .qa-a a:focus-visible {
  color: var(--signal-orange);
}

/* ---------- 纠错块 ---------- */
.page-faq .fix-block {
  margin-top: 14px;
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid var(--line-mid);
  border-left: 4px solid var(--signal-orange);
  background: rgba(15, 47, 36, 0.86);
}

.page-faq .fix-block > p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(233, 242, 234, 0.82);
}

.page-faq .steps {
  list-style: none;
  counter-reset: fixstep;
  display: grid;
  gap: 12px;
  margin: 18px 0;
  padding: 0;
}

.page-faq .steps li {
  counter-increment: fixstep;
  display: flex;
  gap: 12px;
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(233, 242, 234, 0.82);
}

.page-faq .steps li::before {
  content: counter(fixstep, decimal-leading-zero);
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  color: var(--data-yellow);
  padding-top: 4px;
}

.page-faq .fix-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-faq .fix-mail {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--electric-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-mid);
  word-break: break-all;
}

.page-faq .fix-mail:hover,
.page-faq .fix-mail:focus-visible {
  border-bottom-color: var(--electric-cyan);
}

/* ---------- 联系前准备 ---------- */
.page-faq .prep-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-faq .prep-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .prep-key {
  flex: 0 0 auto;
  min-width: 56px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.12em;
  color: var(--data-yellow);
}

.page-faq .prep-val {
  flex: 1 1 200px;
  min-width: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(233, 242, 234, 0.8);
}

.page-faq .prep-foot {
  margin: 0 0 20px;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--muted-moss);
}

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

.page-faq .prep-foot a:hover,
.page-faq .prep-foot a:focus-visible {
  color: var(--data-yellow);
  outline: none;
}

.page-faq .to-top {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-mid);
}

.page-faq .to-top a {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.1em;
  color: var(--line-white);
  text-decoration: none;
  border-bottom: 1px solid var(--line-mid);
  padding-bottom: 2px;
}

.page-faq .to-top a:hover,
.page-faq .to-top a:focus-visible {
  color: var(--electric-cyan);
  border-bottom-color: var(--electric-cyan);
  outline: none;
}

.page-faq .faq-sec {
  scroll-margin-top: 24px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .media-aside {
    grid-template-columns: minmax(0, 1fr) minmax(150px, 34%);
  }

  .page-faq .prep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-faq .score-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(230px, 32%) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 24px;
    padding-right: 4px;
    border-right: 1px solid var(--line-soft);
  }

  .page-faq .rail-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .rail-list li + li {
    margin-top: 6px;
  }

  .page-faq .rail-list a {
    display: flex;
    white-space: normal;
    border-color: transparent;
    border-left: 3px solid var(--line-soft);
    padding: 9px 12px 9px 14px;
  }

  .page-faq .rail-list a:hover,
  .page-faq .rail-list a:focus-visible {
    border-left-color: var(--electric-cyan);
    background: rgba(53, 224, 208, 0.06);
  }

  .page-faq .faq-sec {
    scroll-margin-top: 32px;
  }

  .page-faq .qa summary {
    font-size: 1.02rem;
    padding: 18px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump a,
  .page-faq .rail-list a,
  .page-faq .qa summary {
    transition: none;
  }
}
<<<END>>>