.page-faq {
  --faq-accent: var(--cyan);
  --faq-gap: clamp(16px, 2.4vw, 28px);
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-sans);
}

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

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  padding-top: clamp(16px, 2vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3vw, 38px) 0 clamp(34px, 5vw, 62px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(660px 300px at 8% -12%, rgba(37, 227, 212, 0.13), transparent 70%),
    radial-gradient(520px 280px at 94% 112%, rgba(255, 62, 156, 0.11), transparent 72%);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  align-content: start;
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(30px, 5.2vw, 54px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: 0.02em;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 66ch;
  color: var(--dim);
  font-size: clamp(15.5px, 1.3vw, 17px);
  line-height: 1.78;
}

.page-faq .faq-hero__codes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__codes .tag {
  text-decoration: none;
  display: inline-block;
  transition: transform 0.16s ease, border-color 0.16s ease;
}

.page-faq .faq-hero__codes .tag:hover {
  transform: translateY(-2px);
}

.page-faq .faq-hero__stats {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.page-faq .faq-hero__stats .stat {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius);
  background: var(--raise);
}

.page-faq .faq-hero__stats .stat--magenta {
  border-left-color: var(--magenta);
}

.page-faq .faq-hero__stats .stat--gold {
  border-left-color: var(--gold);
}

.page-faq .faq-hero__quick {
  margin: 0;
  color: var(--dim);
  font-size: 14.5px;
  line-height: 1.7;
}

/* ---------- 外壳与粘性索引条 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  align-items: start;
  padding-top: clamp(28px, 4vw, 52px);
  padding-bottom: clamp(44px, 6vw, 88px);
}

.page-faq .faq-rail {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--raise-2);
  padding: 14px;
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
}

.page-faq .faq-rail .rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail .rail__list > li {
  flex: none;
}

.page-faq .faq-rail .rail__link {
  display: block;
  padding: 8px 13px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--dim);
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.16s ease, background-color 0.16s ease, border-color 0.16s ease;
}

.page-faq .faq-rail .rail__link:hover,
.page-faq .faq-rail .rail__link[aria-current] {
  color: var(--text);
  background: rgba(37, 227, 212, 0.1);
  border-color: rgba(37, 227, 212, 0.42);
}

.page-faq .faq-rail__foot {
  margin: 12px 0 0;
  color: var(--dim);
  font-size: 13px;
  line-height: 1.65;
}

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

.page-faq .faq-sec {
  padding: clamp(26px, 3.4vw, 44px) 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-sec:last-child {
  padding-bottom: 0;
}

.page-faq .faq-sec > .section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.page-faq .faq-sec .section__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  padding-top: 6px;
}

.page-faq .faq-sec .section__title {
  margin: 0;
  font-size: clamp(21px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.015em;
}

.page-faq .faq-sec__lede {
  margin: 0;
  max-width: 68ch;
  color: var(--dim);
  font-size: 15.5px;
  line-height: 1.8;
}

/* ---------- 三种找法 ---------- */
.page-faq .faq-modes {
  display: grid;
  gap: var(--faq-gap);
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  margin-top: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-mode {
  position: relative;
  overflow: hidden;
  padding: 18px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--raise);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-mode::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}

.page-faq .faq-mode--magenta::after {
  background: var(--magenta);
}

.page-faq .faq-mode--gold::after {
  background: var(--gold);
}

.page-faq .faq-mode:hover {
  transform: translateY(-3px);
  border-color: rgba(37, 227, 212, 0.4);
}

.page-faq .faq-mode:hover::after {
  transform: scaleX(1);
}

.page-faq .faq-mode__k {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--dim);
}

.page-faq .faq-mode__t {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-faq .faq-mode__b {
  margin: 0;
  color: var(--dim);
  font-size: 14.5px;
  line-height: 1.78;
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: clamp(20px, 2.8vw, 32px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--zone-index);
}

.page-faq .faq-figure--record {
  margin-top: 0;
  background: var(--zone-record);
}

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

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  margin-top: clamp(22px, 3vw, 36px);
  padding-left: clamp(13px, 2vw, 22px);
  border-left: 2px solid var(--faq-accent);
}

.page-faq .faq-group--cyan {
  --faq-accent: var(--cyan);
}

.page-faq .faq-group--magenta {
  --faq-accent: var(--magenta);
}

.page-faq .faq-group--gold {
  --faq-accent: var(--gold);
}

.page-faq .faq-group__title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-size: clamp(16.5px, 1.8vw, 20px);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-faq .faq-group__title::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--faq-accent);
  box-shadow: 0 0 10px var(--faq-accent);
}

.page-faq .qa-list {
  display: grid;
  gap: 8px;
}

.page-faq .qa {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--raise);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
  transition: border-color 0.16s ease, background-color 0.16s ease;
}

.page-faq .qa:hover {
  border-color: rgba(166, 175, 207, 0.38);
}

.page-faq .qa[open] {
  background: var(--raise-2);
  border-color: var(--faq-accent);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 13px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.62;
  color: var(--text);
}

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

.page-faq .qa__q::before {
  content: "+";
  flex: none;
  width: 14px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.62;
  color: var(--faq-accent);
}

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

.page-faq .qa__a {
  padding: 0 16px 15px 41px;
  color: var(--dim);
  font-size: 14.8px;
  line-height: 1.82;
}

.page-faq .qa__a p {
  margin: 0 0 8px;
  max-width: 68ch;
}

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

.page-faq .qa__a .link {
  color: var(--cyan);
}

/* ---------- 三步排查 ---------- */
.page-faq .faq-flow {
  position: relative;
  margin-top: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-flow__line {
  display: none;
}

.page-faq .faq-steps {
  display: grid;
  gap: var(--faq-gap);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  position: relative;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--raise);
}

.page-faq .faq-step__num {
  display: inline-block;
  position: relative;
  z-index: 1;
  padding: 2px 9px;
  border: 1px solid rgba(37, 227, 212, 0.4);
  border-radius: 999px;
  background: var(--ink);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-step__t {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-faq .faq-step__b {
  margin: 0;
  color: var(--dim);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ---------- 记录区块 ---------- */
.page-faq .faq-records {
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-records__t {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-faq .faq-bullets {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-bullets li {
  position: relative;
  padding-left: 18px;
  color: var(--dim);
  font-size: 14.8px;
  line-height: 1.78;
}

.page-faq .faq-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 1px;
  background: var(--cyan);
}

.page-faq .faq-reach__col--gold .faq-bullets li::before {
  background: var(--gold);
}

/* ---------- 联系 ---------- */
.page-faq .faq-reach {
  display: grid;
  gap: var(--faq-gap);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-reach__col {
  padding: 18px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  border-radius: var(--radius);
  background: var(--raise);
}

.page-faq .faq-reach__col--gold {
  border-top-color: var(--gold);
}

.page-faq .faq-reach__t {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-faq .faq-contacts {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-contacts__item {
  display: grid;
  gap: 6px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--raise-2);
}

.page-faq .faq-contacts__k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-faq .faq-contacts__v {
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  word-break: break-word;
}

.page-faq .faq-contacts__note {
  color: var(--dim);
  font-size: 13.5px;
  line-height: 1.72;
}

.page-faq .faq-reach__foot {
  margin: clamp(16px, 2.2vw, 26px) 0 0;
  color: var(--dim);
  font-size: 14.5px;
  line-height: 1.8;
}

.page-faq .faq-reach__foot .link {
  color: var(--cyan);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 780px) {
  .page-faq .faq-flow__line {
    display: block;
    position: absolute;
    left: 0;
    top: 19px;
    width: 100%;
    height: 2px;
  }

  .page-faq .faq-flow__line path {
    fill: none;
    stroke: var(--line);
    stroke-width: 2;
    stroke-dasharray: 7 7;
  }

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

  .page-faq .faq-records {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-figure--record {
    order: 2;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(200px, 236px) minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

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

  .page-faq .faq-rail .rail__list > li + li {
    margin-top: 2px;
  }

  .page-faq .faq-rail .rail__link {
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-mode,
  .page-faq .qa,
  .page-faq .rail__link,
  .page-faq .faq-hero__codes .tag {
    transition: none;
  }

  .page-faq .faq-mode:hover {
    transform: none;
  }

  .page-faq .faq-mode:hover::after {
    transform: scaleX(0);
  }
}