.page-faq {
  --faq-line: rgba(60, 90, 76, 0.42);
  --faq-body: rgba(242, 237, 228, 0.84);
  background: var(--bg);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 44px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(46, 74, 60, 0.24), rgba(7, 26, 22, 0) 72%),
    var(--bg);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -14%;
  width: 70%;
  height: 176%;
  background: linear-gradient(155deg, rgba(63, 224, 200, 0.16), rgba(63, 224, 200, 0) 62%);
  transform: skewY(-6deg);
  pointer-events: none;
}

.page-faq .faq-hero-cut {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 34%;
  height: 4px;
  background: var(--orange);
  transform: skewX(-6deg);
  transform-origin: left bottom;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-faq .faq-kicker {
  margin: 14px 0 0;
  font-size: var(--f12);
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-size: 28px;
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero .lead {
  margin: 16px 0 0;
  max-width: 42ch;
  font-size: var(--f16);
  line-height: 1.75;
  color: var(--ash);
}

.page-faq .faq-hero-card {
  border: 1px solid var(--line);
  background: var(--bg-2);
  padding: 16px 18px;
  box-shadow: 8px 8px 0 rgba(63, 224, 200, 0.09);
}

.page-faq .faq-card-head {
  margin: 0 0 12px;
  font-size: var(--f12);
  letter-spacing: 0.12em;
  color: var(--clay);
}

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

.page-faq .faq-card-list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line-soft);
  font-size: var(--f14);
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-card-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-card-list li > .mono {
  font-size: var(--f12);
  color: var(--cyan);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-main {
  padding: 34px 0 56px;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

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

/* ---------- 目录 ---------- */
.page-faq .faq-toc {
  border-top: 2px solid var(--cyan);
  padding-top: 12px;
}

.page-faq .faq-toc-head {
  margin: 0 0 10px;
  font-size: var(--f12);
  letter-spacing: 0.14em;
  color: var(--clay);
}

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

.page-faq .faq-toc-list::-webkit-scrollbar {
  display: none;
}

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

.page-faq .faq-toc-list a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid var(--line-soft);
  color: var(--ash);
  font-size: var(--f12);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t-fast), border-color var(--t-fast);
}

.page-faq .faq-toc-list a .mono {
  color: var(--cyan);
}

.page-faq .faq-toc-list a:hover {
  color: var(--paper);
  border-color: var(--cyan-line);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--band-h) + 20px);
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-group:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: 18px;
}

.page-faq .faq-group-num {
  font-size: 28px;
  line-height: 1;
  font-weight: 700;
  padding-top: 2px;
  color: rgba(63, 224, 200, 0.2);
  -webkit-text-stroke: 1px var(--cyan-line);
}

.page-faq .faq-group-title {
  min-width: 0;
}

.page-faq .faq-group-title h2 {
  margin: 0;
  font-size: 20px;
  line-height: 1.35;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group-title p {
  margin: 8px 0 0;
  font-size: var(--f14);
  line-height: 1.7;
  color: var(--ash);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--line-soft);
  background: var(--bg-2);
  margin-bottom: 10px;
  transition: border-color var(--t-fast), background-color var(--t-fast);
}

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

.page-faq .faq-item:hover {
  border-color: var(--line);
  border-left-color: var(--cyan-line);
}

.page-faq .faq-item[open] {
  border-left-color: var(--cyan);
  background: rgba(46, 74, 60, 0.3);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) 16px;
  gap: 12px;
  align-items: start;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: var(--f16);
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
}

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

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

.page-faq .faq-item > summary::after {
  content: "+";
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1.4;
  text-align: center;
  color: var(--cyan);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
}

.page-faq .faq-item > summary:hover .faq-q-text {
  color: var(--cyan-soft);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-q-num {
  display: grid;
  place-items: center;
  height: 22px;
  font-size: var(--f12);
  color: var(--clay);
  border: 1px solid rgba(180, 105, 63, 0.55);
}

.page-faq .faq-q-text {
  transition: color var(--t-fast);
}

.page-faq .faq-answer {
  border-top: 1px solid var(--line-soft);
  padding: 16px 18px 20px;
}

/* ---------- 步骤条 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-step {
  position: relative;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-faq .faq-step p {
  margin: 0;
  font-size: var(--f14);
  line-height: 1.8;
  color: var(--faq-body);
}

.page-faq .faq-step-n {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  font-size: var(--f12);
  color: var(--cyan);
  border: 1px solid var(--cyan-line);
  background: rgba(63, 224, 200, 0.07);
}

.page-faq .faq-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 13.5px;
  top: 30px;
  bottom: -14px;
  width: 1px;
  background: var(--line);
}

.page-faq .faq-tip {
  margin: 14px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--clay);
  font-size: var(--f12);
  line-height: 1.7;
  color: var(--ash);
}

/* ---------- 图示 ---------- */
.page-faq .faq-shot {
  margin: 18px 0 0;
  border: 1px solid var(--line);
  background: var(--bg);
}

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

.page-faq .faq-shot figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-size: var(--f12);
  line-height: 1.65;
  color: var(--ash);
}

/* ---------- 底部 ---------- */
.page-faq .faq-cta {
  border-top: 1px solid var(--line);
  padding: 40px 0 52px;
  background: linear-gradient(118deg, rgba(255, 138, 61, 0.13), rgba(63, 224, 200, 0.09) 58%, rgba(7, 26, 22, 0) 100%);
}

.page-faq .faq-cta-inner {
  display: grid;
  gap: 16px;
}

.page-faq .faq-cta h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-cta p {
  margin: 0;
  max-width: 52ch;
  font-size: var(--f14);
  line-height: 1.8;
  color: var(--ash);
}

.page-faq .faq-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 44px 0 56px;
  }

  .page-faq .faq-hero h1 {
    font-size: 44px;
  }

  .page-faq .faq-main {
    padding: 44px 0 68px;
  }

  .page-faq .faq-answer {
    padding-left: 56px;
    padding-right: 22px;
  }

  .page-faq .faq-item > summary {
    padding: 18px 22px;
  }

  .page-faq .faq-group-head {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 16px;
  }

  .page-faq .faq-group-num {
    font-size: 44px;
  }

  .page-faq .faq-group-title h2 {
    font-size: 28px;
  }

  .page-faq .faq-cta {
    padding: 48px 0 60px;
  }

  .page-faq .faq-cta-inner {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- 桌面：左目录 + 右问答 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
    gap: 40px;
    align-items: end;
  }

  .page-faq .faq-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--band-h) + 28px);
    align-self: start;
  }

  .page-faq .faq-toc-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .page-faq .faq-toc-list li {
    flex: none;
  }

  .page-faq .faq-toc-list a {
    display: grid;
    grid-template-columns: 26px minmax(0, 1fr);
    gap: 10px;
    padding: 10px 0 10px 12px;
    border: 0;
    border-left: 2px solid var(--line-soft);
    background: transparent;
    font-size: var(--f14);
    white-space: normal;
    transition: color var(--t-fast), border-color var(--t-fast);
  }

  .page-faq .faq-toc-list a[aria-current="true"] {
    color: var(--cyan-soft);
    border-left-color: var(--cyan);
  }

  .page-faq .faq-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    column-gap: 40px;
  }

  .page-faq .faq-cta h2,
  .page-faq .faq-cta p {
    grid-column: 1;
  }

  .page-faq .faq-cta-actions {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: end;
  }
}