.page-faq {
  --faq-gap: clamp(1rem, 2.4vw, 1.5rem);
  --faq-pad: clamp(2.6rem, 6vw, 4.5rem);
  background: var(--deep-space);
  color: var(--ice-text);
  overflow-x: hidden;
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 1.1rem 0 0;
  font-size: var(--step-13);
  color: var(--mist-text);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--hairline);
}

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

.page-faq .breadcrumb a:hover {
  color: var(--pulse-green);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 5vw, 3.4rem) 0 var(--faq-pad);
  background:
    radial-gradient(115% 88% at 90% -12%, rgba(43, 240, 160, 0.16), transparent 62%),
    radial-gradient(95% 80% at -6% 0%, rgba(37, 201, 255, 0.14), transparent 58%),
    var(--ink-navy);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -12%;
  top: 16%;
  width: 48%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(43, 240, 160, 0.6));
  transform: rotate(-15deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--pulse-green), var(--electric-cyan) 42%, transparent 78%);
}

.page-faq .faq-title {
  font-family: var(--font-heading);
  font-size: var(--step-64);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--ice-text);
  max-width: 18ch;
  margin: 0.5rem 0 1rem;
}

.page-faq .faq-lede {
  max-width: 62ch;
  margin: 0 0 clamp(1.5rem, 3vw, 2.2rem);
  font-size: var(--step-17);
  line-height: 1.85;
  color: var(--mist-text);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 clamp(1.4rem, 3vw, 2rem);
  padding: 0;
  list-style: none;
  border: 1px solid var(--hairline);
  background: var(--hairline);
}

.page-faq .faq-stats li {
  padding: 1rem 1.1rem 1.1rem;
  background: var(--panel-slate);
}

.page-faq .faq-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--step-28);
  font-weight: 700;
  line-height: 1.1;
  color: var(--pulse-green);
}

.page-faq .faq-stat-label {
  display: block;
  margin-top: 0.35rem;
  font-size: var(--step-13);
  color: var(--mist-text);
}

.page-faq .faq-shortcuts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* 通用栏目标题 */
.page-faq .faq-sec-head {
  max-width: 66ch;
  margin-bottom: clamp(1.4rem, 3vw, 2.2rem);
}

.page-faq .faq-sec-head h2 {
  margin: 0.35rem 0 0.6rem;
  font-family: var(--font-heading);
  font-size: var(--step-40);
  font-weight: 800;
  line-height: 1.16;
  color: var(--ice-text);
}

.page-faq .faq-sec-head p {
  margin: 0;
  font-size: var(--step-17);
  line-height: 1.8;
  color: var(--mist-text);
}

/* 高频问题 */
.page-faq .faq-quick {
  position: relative;
  padding: var(--faq-pad) 0;
  background: var(--deep-space);
}

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

.page-faq .quick-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: clamp(1.2rem, 2.6vw, 1.8rem);
  background: var(--panel-slate);
  border: 1px solid var(--hairline);
  clip-path: var(--clip-panel);
}

.page-faq .quick-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  width: 42px;
  height: 3px;
  background: var(--pulse-green);
}

.page-faq .quick-card--lead::before {
  background: linear-gradient(90deg, var(--pulse-green), var(--electric-cyan));
}

.page-faq .quick-tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step-13);
  letter-spacing: 0.08em;
  color: var(--electric-cyan);
}

.page-faq .quick-q {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--step-20);
  font-weight: 800;
  line-height: 1.4;
  color: var(--ice-text);
}

.page-faq .quick-a {
  margin: 0;
  font-size: var(--step-15);
  line-height: 1.85;
  color: var(--mist-text);
}

.page-faq .quick-card--lead .quick-q {
  font-size: var(--step-28);
}

.page-faq .quick-link {
  color: var(--pulse-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 240, 160, 0.4);
}

.page-faq .quick-link:hover {
  color: var(--electric-cyan);
  border-bottom-color: var(--electric-cyan);
}

/* 分组问答 */
.page-faq .faq-handbook {
  padding: var(--faq-pad) 0 calc(var(--faq-pad) + 1rem);
  background:
    linear-gradient(180deg, var(--deep-space) 0%, #09152e 100%);
}

.page-faq .faq-tabs {
  margin-top: 0.4rem;
}

.page-faq .tablist {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--hairline);
  scrollbar-width: thin;
}

.page-faq .tab {
  flex: 0 0 auto;
  padding: 0.62rem 1.05rem;
  font-family: var(--font-heading);
  font-size: var(--step-15);
  font-weight: 700;
  color: var(--mist-text);
  background: transparent;
  border: 1px solid var(--hairline);
  clip-path: var(--clip-btn);
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.page-faq .tab:hover {
  color: var(--ice-text);
  border-color: var(--electric-cyan);
}

.page-faq .tab[aria-selected="true"] {
  color: var(--on-green);
  background: var(--pulse-green);
  border-color: var(--pulse-green);
}

.page-faq .tab[aria-selected="true"]:hover {
  color: var(--on-green);
}

.page-faq .tabpanel {
  padding-top: clamp(1.4rem, 3vw, 2.1rem);
}

.page-faq .tabpanel[hidden] {
  display: none;
}

.page-faq .panel-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.2rem, 2.6vw, 2rem);
}

.page-faq .panel-figure {
  margin: 0;
  border: 1px solid var(--hairline);
  background: var(--panel-slate);
  overflow: hidden;
}

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

.page-faq .panel-figure figcaption {
  padding: 0.7rem 0.95rem;
  font-size: var(--step-13);
  line-height: 1.7;
  color: var(--mist-text);
  border-top: 1px solid var(--hairline);
}

.page-faq .rule-banner {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 1.05rem 1.15rem;
  margin-bottom: 1.2rem;
  border: 1px solid rgba(255, 178, 46, 0.45);
  border-left: 3px solid var(--amber-rule);
  background: linear-gradient(90deg, rgba(255, 178, 46, 0.12), rgba(18, 34, 74, 0.6));
}

.page-faq .rule-banner p {
  margin: 0;
  font-size: var(--step-15);
  line-height: 1.8;
  color: var(--mist-text);
}

.page-faq .qa-list {
  display: grid;
  gap: 0.7rem;
}

.page-faq .qa {
  position: relative;
  background: rgba(18, 34, 74, 0.58);
  border: 1px solid var(--hairline);
  transition: border-color 180ms ease, background 180ms ease;
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--pulse-green);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 200ms ease;
}

.page-faq .qa[open] {
  border-color: rgba(43, 240, 160, 0.42);
  background: rgba(18, 34, 74, 0.92);
}

.page-faq .qa[open]::before {
  transform: scaleY(1);
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 1rem 1.1rem;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: var(--step-17);
  font-weight: 700;
  line-height: 1.6;
  color: var(--ice-text);
}

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

.page-faq .qa-q:hover {
  color: var(--pulse-green);
}

.page-faq .qa-q::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  padding-top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--electric-cyan);
}

.page-faq .qa[open] .qa-q::after {
  content: "–";
  color: var(--pulse-green);
}

.page-faq .qa-num {
  flex: 0 0 auto;
  padding-top: 0.32rem;
  font-family: var(--font-mono);
  font-size: var(--step-13);
  color: var(--electric-cyan);
}

.page-faq .qa-a {
  padding: 0 1.1rem 1.15rem;
  max-width: 66ch;
  font-size: var(--step-15);
  line-height: 1.85;
  color: var(--mist-text);
}

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

/* 人工支持 */
.page-faq .faq-support {
  position: relative;
  padding: calc(var(--faq-pad) + 1.2rem) 0 var(--faq-pad);
  background: linear-gradient(180deg, var(--ink-navy) 0%, #060d1d 100%);
  clip-path: polygon(0 44px, 100% 0, 100% 100%, 0 100%);
}

.page-faq .support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 3.2vw, 2.6rem);
}

.page-faq .support-media {
  border: 1px solid var(--hairline);
  overflow: hidden;
  background: var(--panel-slate);
}

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

.page-faq .support-body h2 {
  margin: 0.35rem 0 0.7rem;
  font-family: var(--font-heading);
  font-size: var(--step-40);
  font-weight: 800;
  line-height: 1.16;
  color: var(--ice-text);
}

.page-faq .support-lede {
  margin: 0 0 1.4rem;
  max-width: 58ch;
  font-size: var(--step-17);
  line-height: 1.85;
  color: var(--mist-text);
}

.page-faq .support-steps {
  display: grid;
  gap: 0.55rem;
  margin: 0 0 1.4rem;
  padding: 0;
  list-style: none;
}

.page-faq .support-steps li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.7rem 0.9rem;
  background: rgba(18, 34, 74, 0.6);
  border-left: 2px solid var(--electric-cyan);
}

.page-faq .step-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--step-13);
  color: var(--electric-cyan);
  padding-top: 0.2rem;
}

.page-faq .step-text {
  font-size: var(--step-15);
  line-height: 1.8;
  color: var(--mist-text);
}

.page-faq .support-channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  border: 1px solid var(--hairline);
  background: var(--hairline);
}

.page-faq .support-channel {
  padding: 1rem 1.15rem;
  background: var(--panel-slate);
}

.page-faq .support-channel dt {
  margin-bottom: 0.35rem;
  font-size: var(--step-13);
  color: var(--mist-text);
}

.page-faq .support-channel dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step-17);
  color: var(--pulse-green);
  word-break: break-all;
}

.page-faq .support-notes {
  display: grid;
  gap: 0.55rem;
  max-width: 80ch;
  margin-top: clamp(1.8rem, 4vw, 2.8rem);
  padding-top: 1.2rem;
  border-top: 1px solid var(--hairline);
}

.page-faq .support-notes p {
  margin: 0;
  font-size: var(--step-13);
  line-height: 1.9;
  color: var(--mist-text);
}

/* 响应式 */
@media (min-width: 720px) {
  .page-faq .faq-title {
    transform: rotate(-1.5deg);
    transform-origin: left center;
  }

  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .support-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .quick-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: clamp(1rem, 1.8vw, 1.5rem);
  }

  .page-faq .quick-card--lead {
    grid-column: 1 / span 7;
  }

  .page-faq .quick-card--a {
    grid-column: 8 / span 5;
  }

  .page-faq .quick-card--b {
    grid-column: 1 / span 4;
  }

  .page-faq .quick-card--c {
    grid-column: 5 / span 8;
  }
}

@media (min-width: 980px) {
  .page-faq .panel-body--split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-faq .qa-list--duo {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-faq .support-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa::before,
  .page-faq .tab {
    transition: none;
  }

  .page-faq .faq-title {
    transform: none;
  }
}