.page-faq {
  --faq-index-w: 250px;
  background: var(--arena-900);
  color: var(--ink);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: 22px 0 44px;
  background:
    radial-gradient(110% 82% at 88% -18%, rgba(43, 227, 242, .14), transparent 62%),
    radial-gradient(78% 68% at 2% -12%, rgba(255, 122, 47, .09), transparent 68%);
}

.page-faq .breadcrumb {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-muted);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
}

.page-faq .breadcrumb a {
  color: var(--ink-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

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

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

.page-faq .faq-hero-grid {
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero-copy h1 {
  font-family: var(--font-head);
  font-size: clamp(36px, 7.4vw, 76px);
  line-height: 1;
  letter-spacing: -0.01em;
  margin: 12px 0 18px;
  color: var(--ink);
  overflow-wrap: break-word;
}

.page-faq .faq-hero-lead {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-muted);
}

.page-faq .faq-hero-panel {
  border-top: 2px solid var(--cyan);
  border-bottom: 1px solid var(--hairline);
  background: linear-gradient(180deg, rgba(22, 35, 61, .7), rgba(11, 20, 40, .18));
}

.page-faq .faq-panel-label {
  margin: 0;
  padding: 12px 14px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-panel-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-panel-row:last-child {
  border-bottom: 0;
}

.page-faq .faq-panel-key {
  font-size: 13px;
  color: var(--ink-muted);
  min-width: 0;
}

.page-faq .faq-panel-val {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  font-weight: 500;
  color: var(--green);
  white-space: nowrap;
  flex: none;
}

/* ---------- 三步上手 ---------- */

.page-faq .faq-steps {
  padding: 12px 0 52px;
}

.page-faq .faq-steps .section-head {
  margin-bottom: 22px;
}

.page-faq .faq-steps .section-title {
  font-family: var(--font-head);
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.12;
  margin: 8px 0 0;
  color: var(--ink);
  max-width: 22ch;
}

.page-faq .step-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .step-item {
  position: relative;
  padding: 20px 0 22px;
  border-top: 2px solid var(--hairline);
}

.page-faq .step-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: -2px;
  width: 46px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .step-item:nth-child(2)::before {
  background: var(--orange);
}

.page-faq .step-item:nth-child(3)::before {
  background: var(--green);
}

.page-faq .step-num {
  display: block;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ink-muted);
  margin-bottom: 10px;
}

.page-faq .step-item h3 {
  font-family: var(--font-head);
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: .01em;
  margin: 0 0 8px;
  color: var(--ink);
}

.page-faq .step-item p {
  margin: 0;
  max-width: 36ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-muted);
}

.page-faq .faq-steps-figure {
  margin: 34px 0 0;
}

.page-faq .faq-steps-figure .media-frame {
  aspect-ratio: 5 / 2;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--arena-800);
}

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

.page-faq .faq-steps-figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--ink-muted);
}

/* ---------- 问答主体 ---------- */

.page-faq .faq-body {
  padding: 34px 0 54px;
  background: var(--arena-800);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-layout {
  display: grid;
  gap: 26px;
}

.page-faq .faq-index {
  position: sticky;
  top: var(--header-h);
  z-index: 10;
  margin: 0 -20px;
  padding: 10px 20px 12px;
  background: var(--arena-800);
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-index-title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0 0 2px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.page-faq .faq-index-list li {
  scroll-snap-align: start;
  flex: none;
}

.page-faq .faq-index-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 9px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease);
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--ink);
  border-color: var(--cyan);
  background: rgba(43, 227, 242, .08);
}

.page-faq .faq-index-num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--cyan);
}

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

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 76px);
}

.page-faq .faq-group + .faq-group {
  margin-top: 42px;
}

.page-faq .faq-group-head {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 4px 0 14px 18px;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-group-head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  bottom: 15px;
  width: 3px;
  border-radius: 2px;
  background: var(--cyan);
}

.page-faq #group-schedule .faq-group-head::before {
  background: var(--orange);
}

.page-faq #group-lineup .faq-group-head::before {
  background: var(--green);
}

.page-faq #group-download .faq-group-head::before {
  background: var(--cyan);
}

.page-faq #group-account .faq-group-head::before {
  background: var(--orange);
}

.page-faq .faq-group-num {
  flex: none;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(20px, 2.6vw, 27px);
  line-height: 1.15;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  min-height: 44px;
  padding: 16px 0;
  margin: 0;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
  transition: color var(--dur-fast) var(--ease);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-data);
  font-size: 19px;
  line-height: 1.25;
  color: var(--cyan);
}

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

.page-faq .faq-item[open] summary::after {
  content: "–";
}

.page-faq .faq-item summary:hover {
  color: var(--cyan);
}

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

.page-faq .faq-answer {
  padding: 0 0 20px;
  animation: faq-open var(--dur-base) var(--ease);
}

.page-faq .faq-answer p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--ink-muted);
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 联系收束 ---------- */

.page-faq .faq-contact {
  padding: 46px 0 56px;
  background:
    linear-gradient(180deg, rgba(43, 227, 242, .05), transparent 42%),
    var(--arena-900);
}

.page-faq .faq-contact-grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-contact-copy h2 {
  font-family: var(--font-head);
  font-size: clamp(25px, 4vw, 38px);
  line-height: 1.14;
  letter-spacing: .01em;
  margin: 10px 0 14px;
  color: var(--ink);
  max-width: 20ch;
}

.page-faq .faq-contact-copy > p {
  margin: 0 0 20px;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-muted);
}

.page-faq .faq-contact-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-contact-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 18px;
  padding: 13px 0;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-contact-key {
  flex: none;
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.page-faq .faq-contact-val {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  overflow-wrap: anywhere;
  word-break: break-word;
}

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

.page-faq .faq-contact-note {
  margin: 0 0 22px;
  max-width: 54ch;
  font-size: 13px;
  line-height: 1.8;
  color: var(--steel);
}

.page-faq .faq-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-contact-figure {
  margin: 0;
}

.page-faq .faq-contact-figure .media-frame {
  aspect-ratio: 3 / 2;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--arena-800);
  box-shadow: var(--shadow-hair);
}

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

/* ---------- 中屏 ---------- */

@media (min-width: 760px) {
  .page-faq .faq-hero {
    padding: 28px 0 56px;
  }

  .page-faq .step-rail {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 36px;
  }

  .page-faq .step-item {
    padding: 22px 0 6px;
  }

  .page-faq .step-item p {
    max-width: 30ch;
  }

  .page-faq .faq-contact-actions .btn {
    min-width: 168px;
    text-align: center;
  }
}

/* ---------- 宽屏 ---------- */

@media (min-width: 960px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: end;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 30px);
    margin: 0;
    padding: 0;
    background: transparent;
    border-bottom: 0;
  }

  .page-faq .faq-index-title {
    margin-bottom: 14px;
  }

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

  .page-faq .faq-index-list li {
    width: 100%;
  }

  .page-faq .faq-index-list a {
    width: 100%;
    border: 0;
    border-left: 2px solid var(--hairline);
    border-radius: 0;
    padding: 13px 12px 13px 15px;
    font-size: 14px;
    background: transparent;
    transition: color var(--dur-fast) var(--ease),
      border-color var(--dur-fast) var(--ease),
      background var(--dur-fast) var(--ease);
  }

  .page-faq .faq-index-list a:hover,
  .page-faq .faq-index-list a:focus-visible {
    border-left-color: var(--cyan);
    color: var(--ink);
    background: linear-gradient(90deg, rgba(43, 227, 242, .1), transparent 72%);
  }

  .page-faq .faq-group {
    scroll-margin-top: calc(var(--header-h) + 26px);
  }

  .page-faq .faq-item summary {
    font-size: 16px;
    padding: 17px 0;
  }

  .page-faq .faq-answer p {
    font-size: 15px;
  }

  .page-faq .faq-contact-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: center;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-answer {
    animation: none;
  }

  .page-faq .faq-index-list a,
  .page-faq .faq-item summary,
  .page-faq .breadcrumb a {
    transition: none;
  }
}