.page-faq {
  --faq-gap: clamp(20px, 4vw, 48px);
  display: block;
  position: relative;
  background: var(--ink);
  color: var(--text);
}

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

/* ---------- 面包屑 ---------- */

.page-faq .breadcrumb {
  border-bottom: 1px solid var(--line-soft);
  background: var(--ink);
}

.page-faq .breadcrumb__list {
  list-style: none;
  margin: 0;
  padding: 12px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-faq .breadcrumb__item a {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--t-base) var(--ease);
}

.page-faq .breadcrumb__item a:hover,
.page-faq .breadcrumb__item a:focus-visible {
  color: var(--cyan);
}

.page-faq .breadcrumb__item[aria-current="page"] {
  color: var(--text);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 86% 0%, rgba(0, 229, 200, .10), transparent 58%),
    linear-gradient(180deg, var(--ink) 0%, var(--panel) 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(38, 52, 77, .55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(38, 52, 77, .55) 1px, transparent 1px);
  background-size: 80px 80px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 88%);
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-5);
  padding-top: clamp(40px, 7vw, 88px);
  padding-bottom: clamp(36px, 6vw, 72px);
}

.page-faq .faq-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-faq .faq-eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--cyan);
  flex: none;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-size: clamp(30px, 5.2vw, 60px);
  line-height: 1.12;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--text);
  max-width: 18ch;
}

.page-faq .faq-hero__lede {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--dim);
}

.page-faq .faq-hero__actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-hero__meta {
  border: 1px solid var(--line);
  background: rgba(16, 27, 46, .78);
  padding: 20px;
}

.page-faq .faq-hero__meta .mono-label {
  display: block;
  margin: 0 0 6px;
}

.page-faq .meta-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .meta-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .meta-row__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-faq .meta-row__v {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
  text-align: right;
}

/* ---------- 快速开始 ---------- */

.page-faq .faq-start {
  border-bottom: 1px solid var(--line);
  background: var(--ink);
}

.page-faq .faq-start__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  padding-top: clamp(40px, 7vw, 88px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-faq .faq-start__copy .h-section {
  margin: 10px 0 0;
}

.page-faq .steps {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .step__num {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.4;
  color: var(--cyan);
  letter-spacing: .04em;
}

.page-faq .step__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .step p {
  grid-column: 2 / -1;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 10px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

.page-faq .faq-figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
  line-height: 1.6;
}

/* ---------- 文档式问答区 ---------- */

.page-faq .faq-doc {
  background: linear-gradient(180deg, var(--ink) 0%, #0C1728 45%, var(--ink) 100%);
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-faq .faq-doc__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-6);
}

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

.page-faq .faq-index .mono-label {
  margin: 0 0 8px;
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 12px;
  border: 1px solid transparent;
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--t-base) var(--ease), border-color var(--t-base) var(--ease), background-color var(--t-base) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--text);
  border-color: var(--line);
  background: var(--panel);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--cyan);
  opacity: .85;
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  padding-top: clamp(34px, 5vw, 56px);
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 27px);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.3;
  color: var(--text);
}

.page-faq .faq-group__desc {
  margin: 14px 0 4px;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 手风琴 ---------- */

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

.page-faq .qa__q {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 14px;
  padding: 17px 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
  transition: color var(--t-base) var(--ease);
}

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

.page-faq .qa__q:hover {
  color: var(--dim);
}

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

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
  padding-top: 3px;
}

.page-faq .qa__mark {
  width: 18px;
  height: 18px;
  margin-top: 4px;
  color: var(--muted);
  flex: none;
  transition: transform var(--t-base) var(--ease), color var(--t-base) var(--ease);
}

.page-faq .qa:hover .qa__mark {
  color: var(--cyan);
}

.page-faq .qa[open] .qa__mark {
  transform: rotate(180deg);
  color: var(--cyan);
}

.page-faq .qa[open] .qa__q {
  color: var(--text);
}

.page-faq .qa__body {
  max-width: 64ch;
  padding: 0 0 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--dim);
  animation: faqDrop var(--t-base) var(--ease) both;
}

@keyframes faqDrop {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 人工通道 ---------- */

.page-faq .faq-channels {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-channel {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 22px;
  background: var(--panel);
  justify-items: start;
}

.page-faq .faq-channel__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .faq-channel__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text);
}

.page-faq .faq-channel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-note {
  margin: 20px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 200, .4);
  transition: border-color var(--t-base) var(--ease);
}

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

/* ---------- 底部通栏 ---------- */

.page-faq .faq-banner {
  position: relative;
  margin: 0;
  border-top: 1px solid var(--line);
  overflow: hidden;
  background: var(--panel);
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: clamp(180px, 26vw, 300px);
  object-fit: cover;
  opacity: .5;
}

.page-faq .faq-banner__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  background: linear-gradient(90deg, rgba(10, 18, 32, .92) 0%, rgba(10, 18, 32, .55) 60%, rgba(10, 18, 32, .3) 100%);
}

.page-faq .faq-banner__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
}

.page-faq .faq-banner__text {
  margin: 0;
  max-width: 40ch;
  font-size: clamp(15px, 2vw, 19px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
}

/* ---------- 断点 ---------- */

@media (min-width: 700px) {
  .page-faq .step {
    grid-template-columns: 56px minmax(150px, 200px) minmax(0, 1fr);
    align-items: baseline;
    gap: 6px 20px;
  }

  .page-faq .step p {
    grid-column: 3 / -1;
  }

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

@media (min-width: 960px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(280px, 4fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: end;
  }

  .page-faq .faq-start__inner {
    grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-doc__inner {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(40px, 6vw, 88px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    align-self: start;
    border-top: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line);
    padding: 0;
  }

  .page-faq .faq-index .mono-label {
    margin: 0 0 12px 16px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-faq .faq-index__link {
    margin-left: -1px;
    border-left: 2px solid transparent;
    border-top: 0;
    border-right: 0;
    border-bottom: 0;
    padding: 9px 0 9px 15px;
    background: none;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--cyan);
    background: none;
  }

  .page-faq .qa__body {
    padding-left: 42px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__body {
    animation: none;
  }

  .page-faq .qa__mark,
  .page-faq .faq-index__link,
  .page-faq .qa__q {
    transition-duration: 1ms;
  }
}