.page-faq {
  --faq-gap: clamp(20px, 3vw, 36px);
  --faq-panel: rgba(10, 46, 43, 0.5);
  background: var(--night);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 52px) 0 clamp(30px, 5vw, 58px);
  background:
    radial-gradient(90% 120% at 88% -20%, rgba(45, 226, 197, 0.14), transparent 62%),
    radial-gradient(70% 90% at 4% 0%, rgba(255, 122, 24, 0.1), transparent 58%),
    linear-gradient(180deg, var(--night-soft) 0%, var(--night) 100%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(0deg, var(--line-soft) 0 1px, transparent 1px 48px);
  opacity: 0.32;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
}

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

.page-faq .breadcrumb {
  margin-bottom: 18px;
}

.page-faq .faq-kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .faq-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6.6vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  transform: skewX(-2deg);
  max-width: 20ch;
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.86;
}

.page-faq .faq-search {
  margin-top: 26px;
  max-width: 520px;
}

.page-faq .faq-search-label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-faq .faq-search-field {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(6, 24, 38, 0.88);
  transition: border-color var(--ease), box-shadow var(--ease);
}

.page-faq .faq-search-field:focus-within {
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(45, 226, 197, 0.28);
}

.page-faq .faq-search-icon {
  flex: none;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--cyan);
}

.page-faq .faq-search-input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 14px 0;
  border: 0;
  background: transparent;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 14px;
}

.page-faq .faq-search-input::placeholder {
  color: var(--mist);
}

.page-faq .faq-search-input:focus {
  outline: none;
}

/* ---------- 两栏布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding: clamp(26px, 5vw, 54px) 0 clamp(42px, 6vw, 78px);
}

/* ---------- 左栏索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(43, 27, 74, 0.42), rgba(6, 24, 38, 0.9));
  padding: 16px 16px 14px;
}

.page-faq .faq-index-head {
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

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

.page-faq .faq-index-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-left: -1px;
  padding: 9px 0 9px 12px;
  border-left: 2px solid transparent;
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(45, 226, 197, 0.07);
}

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

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--turf);
  letter-spacing: 0.06em;
}

.page-faq .faq-index-note {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-height) + 22px);
  margin-bottom: clamp(30px, 5vw, 54px);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 14px;
}

.page-faq .faq-group-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 4vw, 31px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  transform: skewX(-2deg);
}

.page-faq .faq-group-lead {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 三步路径 ---------- */
.page-faq .faq-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-faq .faq-step {
  display: block;
  padding: 14px 22px 16px 14px;
  border: 1px solid var(--line);
  background: linear-gradient(170deg, rgba(10, 46, 43, 0.92), rgba(6, 24, 38, 0.92));
  clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  transition: border-color var(--ease);
}

.page-faq .faq-step:hover {
  border-color: rgba(45, 226, 197, 0.55);
}

.page-faq .faq-step-num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--turf);
}

.page-faq .faq-step-title {
  display: block;
  margin-bottom: 5px;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-step-text {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  object-fit: cover;
}

.page-faq .faq-figure .media-frame-caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(8, 32, 47, 0.55);
  transition: border-color var(--ease), background-color var(--ease);
}

.page-faq .qa:hover {
  border-color: rgba(45, 226, 197, 0.45);
}

.page-faq .qa[open] {
  border-color: var(--cyan);
  background: rgba(10, 46, 43, 0.62);
}

.page-faq .qa-summary {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

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

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

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

.page-faq .qa-mark {
  flex: none;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .qa-toggle {
  flex: none;
  margin-left: auto;
  padding-left: 8px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--mist);
  transition: color var(--ease);
}

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

.page-faq .qa-body {
  padding: 14px 16px 16px;
  border-top: 1px solid var(--line-soft);
  background: var(--faq-panel);
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper);
}

.page-faq .qa-body p {
  margin: 0;
}

.page-faq .qa-body p + p {
  margin-top: 0.9em;
}

.page-faq .qa-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(45, 226, 197, 0.5);
  transition: border-color var(--ease), color var(--ease);
}

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

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-bottom: 18px;
  padding: clamp(16px, 3vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(43, 27, 74, 0.55), rgba(6, 24, 38, 0.92));
}

.page-faq .faq-contact-item {
  padding-left: 12px;
  border-left: 2px solid var(--turf);
}

.page-faq .faq-contact-label {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

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

/* ---------- 延伸入口 ---------- */
.page-faq .faq-next {
  padding: clamp(16px, 3vw, 24px);
  border: 1px solid var(--line);
  border-top: 2px solid var(--turf);
  background: rgba(6, 24, 38, 0.72);
}

.page-faq .faq-next-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-next-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-next-list a {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
  font-size: 14.5px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color var(--ease), border-color var(--ease);
}

.page-faq .faq-next-list a::before {
  content: "→ ";
  font-family: var(--font-mono);
  color: var(--flame);
}

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

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 20px;
  }

  .page-faq .qa-summary {
    font-size: 17px;
    padding: 16px 20px;
    gap: 12px;
  }

  .page-faq .qa-body {
    padding: 16px 20px 18px 48px;
  }

  .page-faq .faq-figure {
    margin-bottom: 24px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 244px minmax(0, 1fr);
    column-gap: clamp(32px, 4vw, 60px);
    align-items: start;
  }

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

  .page-faq .faq-lead {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: 0.01ms !important;
  }
}