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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 56px) 0 clamp(22px, 4vw, 38px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 10% 0%, rgba(55, 242, 214, 0.13), transparent 46%),
    radial-gradient(circle at 94% 16%, rgba(255, 90, 54, 0.14), transparent 44%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(28, 51, 80, 0.7) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(28, 51, 80, 0.7) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.55;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 94%);
  mask-image: linear-gradient(180deg, #000, transparent 94%);
}

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

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--silver);
}

.page-faq .breadcrumb a {
  color: var(--silver);
  text-decoration: none;
}

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

.page-faq .breadcrumb li[aria-current="page"] {
  color: var(--paper);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 58px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 58ch;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.75;
  color: var(--text);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--silver);
}

.page-faq .faq-hero__stats li {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  background: rgba(13, 27, 46, 0.72);
}

.page-faq .faq-hero__stats strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--cyan);
}

.page-faq .faq-hero__stats li:first-child strong {
  color: var(--orange);
}

/* ---------- 主分栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: clamp(26px, 5vw, 52px) 0 clamp(36px, 6vw, 64px);
}

.page-faq .faq-index {
  border: 1px solid var(--line);
  background: linear-gradient(165deg, var(--panel), rgba(7, 17, 31, 0.92) 88%);
  padding: 16px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  background: rgba(55, 242, 214, 0.07);
  border-left-color: var(--cyan);
}

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

.page-faq .faq-index__dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--line);
  transition: background 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .faq-index__link:hover .faq-index__dot,
.page-faq .faq-index__link:focus-visible .faq-index__dot {
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(55, 242, 214, 0.7);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--silver);
}

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

/* ---------- 问答组 ---------- */
.page-faq .faq-group {
  --faq-accent: var(--cyan);
  padding-top: 16px;
  margin-bottom: clamp(32px, 6vw, 54px);
  border-top: 2px solid var(--faq-accent);
  scroll-margin-top: 96px;
}

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

.page-faq .faq-group[data-tone="violet"] { --faq-accent: var(--violet); }
.page-faq .faq-group[data-tone="green"] { --faq-accent: var(--green); }
.page-faq .faq-group[data-tone="orange"] { --faq-accent: var(--orange); }
.page-faq .faq-group[data-tone="yellow"] { --faq-accent: var(--yellow); }

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--faq-accent);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-faq .faq-group__lede {
  margin: 10px 0 20px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  border: 1px solid var(--line);
  background: var(--ink);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.9);
  transition: filter 0.25s ease;
}

.page-faq .faq-figure:hover img {
  filter: saturate(1.05);
}

.page-faq .faq-figure figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--silver);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-left: 3px solid rgba(28, 51, 80, 0.9);
  background: var(--panel);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.page-faq .faq-item:hover {
  border-color: rgba(55, 242, 214, 0.42);
}

.page-faq .faq-item[open] {
  border-color: rgba(55, 242, 214, 0.3);
  border-left-color: var(--faq-accent);
  box-shadow: 0 18px 42px -30px rgba(0, 0, 0, 0.95), 0 0 0 1px rgba(55, 242, 214, 0.08);
  background: linear-gradient(180deg, rgba(13, 27, 46, 1), rgba(7, 17, 31, 0.96));
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
}

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

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

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__sign {
  flex: 0 0 auto;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.35;
  color: var(--faq-accent);
  transition: transform 0.2s ease;
}

.page-faq .faq-item[open] .faq-item__sign {
  transform: rotate(45deg);
}

.page-faq .faq-item__a {
  margin: 0;
  padding: 14px 18px 18px;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
}

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

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(55, 242, 214, 0.35);
  word-break: break-word;
}

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

.page-faq .faq-item__a code {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid rgba(55, 242, 214, 0.26);
  background: rgba(55, 242, 214, 0.1);
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--cyan);
  white-space: nowrap;
}

/* ---------- 底部求助 ---------- */
.page-faq .faq-help-section {
  padding-bottom: clamp(48px, 8vw, 88px);
}

.page-faq .faq-help {
  display: grid;
  gap: 20px;
  padding: clamp(22px, 4.5vw, 40px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  background:
    radial-gradient(circle at 92% 6%, rgba(255, 90, 54, 0.17), transparent 54%),
    linear-gradient(150deg, var(--panel), var(--ink) 80%);
}

.page-faq .faq-help__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-help__text {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .faq-help__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(55, 242, 214, 0.35);
}

.page-faq .faq-help__mailrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
}

.page-faq .faq-help__mail {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  word-break: break-all;
}

.page-faq .faq-help__mail:hover,
.page-faq .faq-help__mail:focus-visible {
  text-decoration: underline;
}

.page-faq .faq-copy-status {
  min-height: 1.2em;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-help__actions .btn {
  text-align: center;
}

/* ---------- 小屏适配 ---------- */
@media (max-width: 899px) {
  .page-faq .faq-index {
    padding: 12px;
  }

  .page-faq .faq-index__title {
    margin-bottom: 8px;
  }

  .page-faq .faq-index__list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
  }

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

  .page-faq .faq-index__link {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-left-width: 1px;
    font-size: 13px;
    white-space: nowrap;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-color: rgba(55, 242, 214, 0.5);
  }

  .page-faq .faq-group {
    scroll-margin-top: 76px;
  }

  .page-faq .faq-item summary {
    padding: 14px 14px;
    font-size: 15px;
    gap: 10px;
  }

  .page-faq .faq-item__a {
    padding: 12px 14px 16px;
    font-size: 14.5px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
  }
}

@media (min-width: 820px) {
  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-faq .faq-help__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-index__dot,
  .page-faq .faq-item,
  .page-faq .faq-item__sign,
  .page-faq .faq-figure img {
    transition: none;
  }

  .page-faq .faq-item[open] .faq-item__sign {
    transform: none;
  }
}