.page-faq {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  padding-bottom: clamp(56px, 8vw, 96px);
  overflow-x: clip;
}

.page-faq::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 660px;
  background:
    radial-gradient(120% 78% at 78% 0%, rgba(57, 255, 182, .13), transparent 62%),
    linear-gradient(180deg, rgba(12, 42, 33, .9), rgba(7, 28, 22, 0) 100%);
  pointer-events: none;
  z-index: 0;
}

.page-faq > * {
  position: relative;
  z-index: 1;
}

.page-faq a {
  color: var(--mint-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(140, 245, 208, .35);
}

.page-faq a:hover,
.page-faq a:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

/* ---------- 首屏拼贴 ---------- */
.page-faq .kb-hero {
  padding: clamp(18px, 3.5vw, 36px) 0 clamp(30px, 5vw, 56px);
}

.page-faq .kb-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-faq .kb-hero__copy {
  min-width: 0;
}

.page-faq .kb-hero__title {
  margin: 12px 0 0;
  font-size: clamp(34px, 7.2vw, 68px);
  line-height: 1.02;
  letter-spacing: -.025em;
  font-weight: 300;
}

.page-faq .kb-hero__hl {
  display: block;
  margin-top: 8px;
  font-weight: 800;
  color: var(--mint);
  text-shadow: 0 0 26px rgba(57, 255, 182, .22);
}

.page-faq .kb-hero__lead {
  margin: 20px 0 0;
  max-width: 48ch;
  color: var(--sage);
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.75;
}

.page-faq .kb-hero__jump {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 0;
  padding: 0;
}

.page-faq .kb-hero__jump a {
  display: inline-block;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: rgba(12, 42, 33, .55);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: .03em;
}

.page-faq .kb-hero__jump a:hover,
.page-faq .kb-hero__jump a:focus-visible {
  border-color: var(--mint);
  color: var(--mint);
}

.page-faq .kb-scale {
  height: 10px;
  margin-top: 26px;
  background: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 14px);
  opacity: .85;
}

.page-faq .kb-hero__panel {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-faq .kb-hero__media {
  margin: 0;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 16px));
}

.page-faq .kb-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .kb-quick {
  padding: 18px 18px 20px;
  background: var(--panel-deep);
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber);
}

.page-faq .kb-quick__text {
  margin: 10px 0 16px;
  color: var(--sage);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 主体双栏 ---------- */
.page-faq .kb-body {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  padding-top: clamp(20px, 3.5vw, 36px);
}

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

.page-faq .kb-rail__label {
  margin: 0 0 10px;
  color: var(--sage);
}

.page-faq .kb-rail__nav {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-faq .kb-rail__link {
  display: block;
  flex: none;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  color: var(--sage);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  white-space: nowrap;
}

.page-faq .kb-rail__link:hover,
.page-faq .kb-rail__link:focus-visible {
  color: var(--mint);
  border-left-color: var(--mint);
  border-bottom-color: var(--line);
}

/* ---------- 区块标题 ---------- */
.page-faq .kb-sec {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .kb-sec + .kb-sec {
  margin-top: clamp(48px, 7vw, 84px);
}

.page-faq .kb-sec__head {
  max-width: 62ch;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .kb-sec__head h2 {
  margin: 8px 0 12px;
  font-size: clamp(24px, 4.2vw, 34px);
  line-height: 1.16;
  letter-spacing: -.015em;
  font-weight: 700;
}

.page-faq .kb-sec__intro {
  margin: 0;
  color: var(--sage);
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 步骤卡 ---------- */
.page-faq .kb-steps__figure {
  margin: 0 0 clamp(16px, 3vw, 24px);
  background: var(--panel);
}

.page-faq .kb-steps__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

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

.page-faq .kb-step__d {
  background: var(--panel-deep);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .kb-step__d[open] {
  background: var(--panel);
  border-left-color: var(--mint);
}

.page-faq .kb-step__summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 14px 14px 12px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .kb-step__summary::marker {
  content: "";
}

.page-faq .kb-step__num {
  flex: none;
  width: 30px;
  color: var(--mint);
  font-size: 13px;
  letter-spacing: .06em;
}

.page-faq .kb-step__title {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.45;
}

.page-faq .kb-step__plus {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
}

.page-faq .kb-step__plus::before,
.page-faq .kb-step__plus::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 100%;
  height: 1px;
  background: var(--sage);
  transform: translateY(-50%);
  transition: transform .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .kb-step__plus::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .kb-step__d[open] .kb-step__plus::before,
.page-faq .kb-step__d[open] .kb-step__plus::after {
  background: var(--mint);
}

.page-faq .kb-step__d[open] .kb-step__plus::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .kb-step__body {
  padding: 0 14px 16px 52px;
  color: var(--sage);
  font-size: 14.5px;
  line-height: 1.75;
}

.page-faq .kb-step__body p {
  margin: 0 0 10px;
}

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

/* ---------- 快速查找 ---------- */
.page-faq .kb-find {
  display: grid;
  gap: 12px;
}

.page-faq .kb-find__item {
  display: block;
  padding: 18px 18px 20px;
  background: var(--panel-deep);
  border: 1px solid var(--line);
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: background-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .kb-find__item:hover,
.page-faq .kb-find__item:focus-visible {
  background: var(--panel);
  color: var(--paper);
  box-shadow: inset 0 0 0 1px var(--mint);
}

.page-faq .kb-find__item h3 {
  margin: 8px 0 8px;
  font-size: 17px;
  line-height: 1.35;
  font-weight: 700;
}

.page-faq .kb-find__item p {
  margin: 0 0 14px;
  color: var(--sage);
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .kb-find__go {
  display: inline-block;
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
}

/* ---------- 问题分类 ---------- */
.page-faq .kb-cats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
}

.page-faq .kb-cats a {
  display: inline-block;
  padding: 7px 11px;
  border: 1px solid var(--line);
  color: var(--sage);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-faq .kb-cats a:hover,
.page-faq .kb-cats a:focus-visible {
  border-color: var(--mint);
  color: var(--mint);
}

.page-faq .kb-cat {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .kb-cat + .kb-cat {
  margin-top: clamp(28px, 4vw, 40px);
}

.page-faq .kb-cat__title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-faq .kb-cat__title .mono {
  color: var(--mint);
  font-size: 12px;
  letter-spacing: .1em;
}

.page-faq .kb-q {
  border-bottom: 1px solid var(--line);
}

.page-faq .kb-q > summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: 15px;
  line-height: 1.55;
}

.page-faq .kb-q > summary::-webkit-details-marker {
  display: none;
}

.page-faq .kb-q > summary::marker {
  content: "";
}

.page-faq .kb-q > summary::after {
  content: "+";
  flex: none;
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
}

.page-faq .kb-q[open] > summary {
  color: var(--mint);
}

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

.page-faq .kb-q__a {
  padding: 0 0 16px;
  color: var(--sage);
  font-size: 14.5px;
  line-height: 1.78;
}

/* ---------- 联系区 ---------- */
.page-faq .kb-contact {
  display: grid;
  gap: 18px;
  padding: clamp(20px, 4vw, 30px);
  background: linear-gradient(135deg, var(--panel), var(--panel-deep));
  border: 1px solid var(--line);
  border-top: 2px solid var(--amber);
}

.page-faq .kb-contact__row {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.page-faq .kb-contact__k {
  color: var(--sage);
  font-size: 11px;
  letter-spacing: .1em;
}

.page-faq .kb-contact__v {
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  word-break: break-word;
}

.page-faq .kb-hint {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 12px;
  margin-top: 14px;
  padding: 14px 16px;
  background: rgba(122, 75, 18, .26);
  border-left: 2px solid var(--amber);
}

.page-faq .kb-hint p {
  flex: 1 1 240px;
  margin: 0;
  color: var(--paper);
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .kb-hint .tag {
  flex: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .kb-find {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .kb-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 28px;
  }
}

@media (min-width: 900px) {
  .page-faq .kb-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: start;
  }

  .page-faq .kb-hero__panel {
    padding-top: 8px;
  }
}

@media (min-width: 980px) {
  .page-faq .kb-body {
    grid-template-columns: 216px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .kb-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-faq .kb-rail__nav {
    display: grid;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .kb-rail__link {
    border: 0;
    border-left: 2px solid var(--line);
    padding: 10px 0 10px 12px;
    white-space: normal;
  }

  .page-faq .kb-rail__link:hover,
  .page-faq .kb-rail__link:focus-visible {
    border-left-color: var(--mint);
    border-bottom: 0;
  }

  .page-faq .kb-step__summary {
    padding: 16px 18px 16px 14px;
  }

  .page-faq .kb-step__body {
    padding: 0 18px 18px 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .kb-step__d,
  .page-faq .kb-step__plus::before,
  .page-faq .kb-step__plus::after,
  .page-faq .kb-find__item {
    transition: none;
  }
}