.page-faq {
  --faq-line: rgba(11, 43, 38, .14);
  --faq-soft: rgba(217, 232, 228, .7);
  --faq-side: 252px;
  color: var(--text);
  background: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + var(--sp-3)) 0 var(--sp-6);
  background:
    radial-gradient(110% 80% at 84% 6%, rgba(199, 244, 100, .16), transparent 60%),
    radial-gradient(90% 70% at 4% 98%, rgba(255, 140, 66, .12), transparent 62%),
    linear-gradient(158deg, var(--ink) 0%, var(--ink-deep) 62%, var(--ink-black) 100%);
  color: var(--mist);
}

.page-faq .faq-hero__trace {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

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

.page-faq .faq-hero .breadcrumb {
  padding-bottom: var(--sp-3);
}

.page-faq .faq-hero .breadcrumb__list {
  color: var(--faq-soft);
  font-size: 13px;
}

.page-faq .faq-hero .breadcrumb__list a {
  color: rgba(217, 232, 228, .86);
  text-decoration: none;
}

.page-faq .faq-hero .breadcrumb__list a:hover,
.page-faq .faq-hero .breadcrumb__list a:focus-visible {
  color: var(--lime);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--sp-5);
}

.page-faq .faq-hero .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .faq-hero h1 {
  margin: var(--sp-2) 0 0;
  font-family: var(--font-title);
  font-size: clamp(28px, 7.2vw, 46px);
  line-height: 1.14;
  letter-spacing: .01em;
  color: var(--paper);
  max-width: 22ch;
}

.page-faq .faq-hero .lede {
  margin: var(--sp-3) 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 3.8vw, 17px);
  line-height: 1.85;
  color: rgba(217, 232, 228, .82);
}

.page-faq .faq-steps {
  list-style: none;
  margin: var(--sp-5) 0 0;
  padding: 0;
  display: grid;
  gap: var(--sp-3);
}

.page-faq .faq-steps li {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: var(--sp-2);
}

.page-faq .faq-steps li::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 42px;
  bottom: -16px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-lime), rgba(199, 244, 100, 0));
}

.page-faq .faq-steps li:last-child::before {
  display: none;
}

.page-faq .faq-steps__num {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-lime);
  border-radius: 4px 14px 4px 14px;
  background: rgba(199, 244, 100, .08);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--lime);
}

.page-faq .faq-steps__body {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-top: 2px;
}

.page-faq .faq-steps__body b {
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
  letter-spacing: .01em;
}

.page-faq .faq-steps__body span {
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(217, 232, 228, .66);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-5);
}

.page-faq .faq-hero .btn--primary {
  background: var(--lime);
  color: var(--ink);
  border-color: transparent;
}

.page-faq .faq-hero .btn--ghost {
  background: transparent;
  color: var(--paper);
  border: 1px solid var(--line-lime);
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--r-cut);
  overflow: hidden;
  border: 1px solid var(--line-lime);
  background: var(--ink-black);
  box-shadow: var(--shadow-deep);
}

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

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-2);
  margin-top: var(--sp-5);
  padding-top: var(--sp-4);
  border-top: 1px dashed rgba(199, 244, 100, .28);
}

.page-faq .faq-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-faq .faq-stats .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(19px, 5vw, 28px);
  letter-spacing: .02em;
  color: var(--lime);
}

.page-faq .faq-stats .stat:nth-child(2) .stat__value {
  color: var(--orange);
}

.page-faq .faq-stats .stat__label {
  font-size: 12.5px;
  line-height: 1.5;
  color: rgba(217, 232, 228, .68);
}

/* ---------- 问答区 ---------- */
.page-faq .faq-body {
  padding: var(--sp-6) 0;
  background: var(--paper);
}

.page-faq .faq-body .section-title {
  margin: 0 0 var(--sp-4);
  font-family: var(--font-title);
  font-size: clamp(20px, 5vw, 28px);
  line-height: 1.25;
  color: var(--ink);
}

.page-faq .faq-layout {
  display: grid;
  gap: var(--sp-4);
}

.page-faq .faq-side__title {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-side .tab-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0 10px;
  scrollbar-width: none;
}

.page-faq .faq-side .tab-list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-side .tab {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border: 1px solid var(--faq-line);
  border-radius: 4px 16px 4px 16px;
  background: rgba(255, 255, 255, .58);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1;
  white-space: nowrap;
  text-align: left;
  cursor: pointer;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}

.page-faq .faq-side .tab:hover {
  border-color: rgba(11, 43, 38, .34);
}

.page-faq .faq-side .tab:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-faq .faq-side .tab[aria-selected="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--lime);
  box-shadow: 0 12px 28px -20px rgba(11, 43, 38, .95);
}

.page-faq .faq-tab__idx {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .faq-side .tab[aria-selected="true"] .faq-tab__idx {
  color: var(--orange);
}

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

.page-faq .faq-panel-head {
  margin-bottom: var(--sp-3);
}

.page-faq .faq-panel-head h3 {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-size: clamp(20px, 4.6vw, 26px);
  line-height: 1.25;
  color: var(--ink);
}

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

.page-faq .faq-qa {
  margin: 0 0 10px;
  border: 1px solid var(--faq-line);
  border-radius: 4px 18px 4px 18px;
  background: rgba(255, 255, 255, .74);
  overflow: hidden;
}

.page-faq .faq-qa[open] {
  border-color: rgba(199, 244, 100, .9);
  box-shadow: 0 18px 34px -30px rgba(11, 43, 38, .85);
}

.page-faq .faq-qa summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-qa summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.2;
  color: var(--ink);
}

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

.page-faq .faq-qa summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: -3px;
}

.page-faq .faq-qa__q {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--ink);
}

.page-faq .faq-qa__a {
  padding: 0 18px 18px;
}

.page-faq .faq-qa__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-more {
  margin: var(--sp-3) 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-more a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
}

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

.page-faq .faq-export-figure {
  margin: var(--sp-4) 0 0;
  border: 1px solid var(--faq-line);
  border-radius: var(--r-cut);
  overflow: hidden;
  background: var(--ink-deep);
}

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

.page-faq .faq-export-figure figcaption {
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--muted);
  background: rgba(255, 255, 255, .62);
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-support {
  padding: var(--sp-6) 0;
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-black) 100%);
  color: var(--mist);
}

.page-faq .faq-support__grid {
  display: grid;
  gap: var(--sp-4);
}

.page-faq .faq-support .eyebrow {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .faq-support__intro h2 {
  margin: 0 0 var(--sp-3);
  font-family: var(--font-title);
  font-size: clamp(22px, 5vw, 32px);
  line-height: 1.2;
  color: var(--paper);
  max-width: 24ch;
}

.page-faq .faq-support__intro p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(217, 232, 228, .78);
  max-width: 52ch;
}

.page-faq .faq-support .btn--primary {
  margin-top: var(--sp-2);
  background: var(--lime);
  color: var(--ink);
  border-color: transparent;
}

.page-faq .faq-support__card {
  padding: var(--sp-4);
  border: 1px solid var(--line-lime);
  border-radius: var(--r-cut);
  background: rgba(18, 58, 51, .62);
  box-shadow: var(--shadow-deep);
}

.page-faq .faq-contact {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-contact dt {
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .faq-contact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-support__note {
  margin: var(--sp-3) 0 0;
  padding-top: var(--sp-3);
  border-top: 1px dashed rgba(199, 244, 100, .26);
  font-size: 13px;
  line-height: 1.75;
  color: rgba(217, 232, 228, .62);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding-top: calc(var(--header-h) + var(--sp-4));
  }

  .page-faq .faq-stats {
    gap: var(--sp-4);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: var(--sp-6);
    align-items: center;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-side) minmax(0, 1fr);
    gap: var(--sp-5);
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-side .tab-list {
    flex-direction: column;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-side .tab {
    width: 100%;
    white-space: normal;
  }

  .page-faq .faq-support__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .9fr);
    gap: var(--sp-6);
    align-items: start;
  }
}

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