.page-faq {
  --faq-nav-w: 248px;
  --faq-anchor-gap: 120px;
  background: var(--void);
  color: var(--text);
}

.page-faq .faq-crumb {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 clamp(36px, 5vw, 68px);
  border-bottom: 1px solid var(--grid-line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -12%;
  width: 62%;
  height: 180%;
  background: radial-gradient(circle at 55% 45%, var(--purple-soft), transparent 64%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 38%;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  pointer-events: none;
}

.page-faq .faq-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

.page-faq .faq-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero-lead {
  margin: 0 0 22px;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-hero-figure {
  margin: 0;
  border: 1px solid var(--grid-line);
  background: var(--base);
  clip-path: polygon(0 0, calc(100% - 34px) 0, 100% 34px, 100% 100%, 0 100%);
  overflow: hidden;
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.92;
}

/* ---------- 三步流程 ---------- */
.page-faq .faq-steps-board {
  margin-top: 28px;
  padding: clamp(20px, 3vw, 32px);
  background: var(--base);
  border: 1px solid var(--grid-line);
  display: grid;
  gap: clamp(24px, 3vw, 36px);
}

.page-faq .faq-steps-scroll {
  overflow-x: auto;
  padding-bottom: 6px;
}

.page-faq .faq-steps-svg {
  display: block;
  width: 100%;
  min-width: 560px;
  height: auto;
}

.page-faq .faq-steps-node {
  fill: var(--void);
  stroke: var(--cyan);
  stroke-width: 2;
}

.page-faq .faq-steps-line {
  stroke: var(--grid-line);
  stroke-width: 1.5;
  stroke-dasharray: 5 5;
}

.page-faq .faq-steps-arrow {
  fill: var(--cyan);
}

.page-faq .faq-steps-num {
  fill: var(--cyan);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  text-anchor: middle;
}

.page-faq .faq-steps-label {
  fill: var(--text);
  font-size: 17px;
  font-weight: 600;
  text-anchor: middle;
}

.page-faq .faq-steps-notes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-faq .faq-steps-notes li {
  border-top: 1px solid var(--grid-line);
  padding-top: 14px;
}

.page-faq .faq-steps-notes h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-faq .faq-steps-notes p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 双栏问答 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.page-faq .faq-nav {
  background: var(--base);
  border: 1px solid var(--grid-line);
  padding: 16px;
}

.page-faq .faq-nav-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  font-family: var(--font-mono);
}

.page-faq .faq-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-faq .faq-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-nav-link .mono {
  font-size: 12px;
  color: var(--purple);
}

.page-faq .faq-nav-link:hover,
.page-faq .faq-nav-link:focus-visible {
  color: var(--text);
  background: var(--raised);
  border-left-color: var(--cyan);
}

.page-faq .faq-nav-foot {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--grid-line);
}

.page-faq .faq-nav-foot p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  margin-bottom: 56px;
  scroll-margin-top: var(--faq-anchor-gap);
}

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

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  align-items: baseline;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--grid-line);
}

.page-faq .faq-group-no {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  color: var(--purple);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-group-lead {
  grid-column: 1 / -1;
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-group-figure {
  margin: 0 0 22px;
  border: 1px solid var(--grid-line);
  background: var(--base);
  clip-path: polygon(0 0, calc(100% - 34px) 0, 100% 34px, 100% 100%, 0 100%);
  overflow: hidden;
}

.page-faq .faq-group-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.9;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--grid-line);
  background: var(--base);
  margin-bottom: 10px;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-item:hover {
  border-color: #2f3d6b;
}

.page-faq .faq-item[open] {
  border-color: rgba(34, 230, 255, 0.42);
  background: var(--raised);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

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

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

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

.page-faq .faq-item-no {
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-faq .faq-item[open] .faq-item-no {
  color: var(--orange);
}

.page-faq .faq-item-q {
  font-size: 16px;
  line-height: 1.55;
  font-weight: 600;
  color: var(--text);
}

.page-faq .faq-item-sign {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-faq .faq-item-sign::before,
.page-faq .faq-item-sign::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.2s ease, background 0.2s ease;
}

.page-faq .faq-item-sign::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.page-faq .faq-item-sign::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
}

.page-faq .faq-item[open] .faq-item-sign::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-item-sign::before {
  background: var(--orange);
}

.page-faq .faq-item-a {
  margin: 0 16px 16px;
  padding-top: 14px;
  border-top: 1px solid var(--grid-line);
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

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

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

.page-faq .faq-key {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-weight: 600;
  white-space: nowrap;
}

.page-faq .faq-item-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.page-faq .faq-item-links a {
  display: inline-block;
  padding: 5px 10px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
  border: 1px solid var(--grid-line);
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-item-links a:hover,
.page-faq .faq-item-links a:focus-visible {
  border-color: var(--cyan);
  background: var(--cyan-soft);
}

/* ---------- 兜底联络 ---------- */
.page-faq .faq-support {
  padding: clamp(20px, 3vw, 32px);
  background: var(--base);
  border: 1px solid var(--grid-line);
  display: grid;
  gap: 26px;
}

.page-faq .faq-support-main h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.35;
  color: var(--text);
}

.page-faq .faq-support-main p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-support-channels {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-support-channels li {
  padding-left: 12px;
  border-left: 2px solid var(--purple);
  display: grid;
  gap: 4px;
}

.page-faq .faq-channel-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-channel-value {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text);
  word-break: break-all;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-steps-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-faq .faq-item-a {
    margin: 0 18px 18px 48px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 48px;
  }

  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 40px;
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-nav-w) minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-nav {
    position: sticky;
    top: 120px;
    padding: 20px;
  }

  .page-faq .faq-nav-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .faq-nav-link {
    display: flex;
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item-sign::before,
  .page-faq .faq-item-sign::after,
  .page-faq .faq-nav-link,
  .page-faq .faq-item-links a {
    transition: none;
  }
}