.page-faq {
  --faq-rule: rgba(199, 206, 214, 0.42);
  --faq-ink-soft: #2C3742;
  --faq-lead: #D6E2EF;
  background: var(--c-snow);
  color: var(--c-ink);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible,
.page-faq button:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.5vw, 54px) 0 clamp(30px, 5vw, 64px);
  background:
    radial-gradient(120% 145% at 88% -25%, rgba(31, 122, 140, 0.55) 0%, rgba(11, 27, 51, 0) 62%),
    linear-gradient(155deg, var(--c-deep) 0%, var(--c-night) 100%);
  color: var(--c-snow);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(199, 206, 214, 0.09) 0 1px, transparent 1px 40px);
  pointer-events: none;
}

.page-faq .faq-hero > .wrap {
  position: relative;
}

.page-faq .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--c-ice);
}

.page-faq .breadcrumbs a {
  color: var(--c-ice);
  text-decoration: none;
}

.page-faq .breadcrumbs__sep {
  color: rgba(159, 211, 219, 0.5);
}

.page-faq .breadcrumbs__current {
  color: var(--c-snow);
  font-weight: 500;
}

.page-faq .faq-hero__kicker {
  margin: 24px 0 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-amber);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 18em;
  font-size: clamp(28px, 5.4vw, 50px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0.005em;
  color: var(--c-snow);
}

.page-faq .faq-hero__rule {
  display: block;
  width: 76px;
  height: 6px;
  margin: 20px 0 0;
  background: var(--c-orange);
  transform: skewX(-22deg);
}

.page-faq .faq-hero__lead {
  max-width: 42em;
  margin: 20px 0 0;
  font-size: 17px;
  line-height: 1.78;
  color: var(--faq-lead);
}

.page-faq .faq-ticks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(199, 206, 214, 0.2);
  border: 1px solid rgba(199, 206, 214, 0.2);
}

.page-faq .faq-ticks li {
  min-width: 0;
  padding: 14px 16px;
  background: rgba(11, 27, 51, 0.74);
}

.page-faq .faq-ticks__num {
  display: block;
  font-size: 23px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-snow);
}

.page-faq .faq-ticks__num--hot {
  color: var(--c-orange);
}

.page-faq .faq-ticks__key {
  display: block;
  margin-top: 7px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-alu);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding: clamp(30px, 5vw, 64px) 0 clamp(44px, 6vw, 92px);
}

.page-faq .faq-body__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

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

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-alu);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  height: 4px;
}

.page-faq .faq-index__list::-webkit-scrollbar-thumb {
  background: var(--c-silver);
}

.page-faq .faq-index__list > li {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  background: var(--c-paper);
  border: 1px solid var(--faq-rule);
  border-left: 3px solid transparent;
  font-size: 14px;
  line-height: 1.2;
  color: var(--c-ink);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.16s var(--ease), color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .faq-index__link .mono {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--c-alu);
  transition: color 0.16s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--c-night);
  color: var(--c-snow);
  border-left-color: var(--c-orange);
}

.page-faq .faq-index__link:hover .mono,
.page-faq .faq-index__link:focus-visible .mono {
  color: var(--c-ice);
}

.page-faq .faq-index__link[data-active="true"] {
  border-left-color: var(--c-orange);
  border-color: var(--c-silver);
  font-weight: 600;
}

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

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(36px, 5vw, 62px);
  scroll-margin-top: 24px;
}

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

.page-faq .band__name {
  margin: 0;
}

.page-faq .faq-group__hint {
  max-width: 42em;
  margin: 16px 0 18px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-alu);
}

.page-faq .faq-list {
  max-width: 780px;
  border-top: 1px solid var(--c-silver);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--c-silver);
  border-left: 2px solid transparent;
  transition: border-left-color 0.16s var(--ease), background-color 0.16s var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--c-orange);
  background: var(--c-paper);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 14px;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-ink);
  cursor: pointer;
  list-style: none;
  transition: color 0.16s var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--c-teal);
}

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-alu);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__q::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--c-teal);
  transition: color 0.16s var(--ease);
}

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

.page-faq .faq-item__a {
  max-width: 720px;
  padding: 0 16px 20px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--faq-ink-soft);
  animation: faq-reveal 0.28s var(--ease) both;
}

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

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

.page-faq .faq-item__a .mono {
  padding: 1px 5px;
  font-size: 0.93em;
  font-weight: 600;
  color: var(--c-teal);
  background: rgba(31, 122, 140, 0.1);
  white-space: nowrap;
}

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

.page-faq .faq-group__more {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-ink);
}

.page-faq .faq-group__more a {
  color: var(--c-teal);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  max-width: 780px;
  margin: 26px 0 0;
  padding: 8px;
  background: var(--c-paper);
  border: 1px solid var(--c-silver);
}

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

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  padding: 0 4px 4px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-alu);
}

/* ---------- 联系卡片 ---------- */
.page-faq .faq-help__cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 20px;
}

.page-faq .faq-help__card {
  min-width: 0;
  padding: 20px 18px 22px;
  background: var(--c-paper);
  border: 1px solid var(--c-silver);
  box-shadow: 6px 6px 0 rgba(16, 24, 32, 0.05);
  transition: transform 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .faq-help__card:hover {
  transform: translateY(-4px);
  border-color: var(--c-orange);
}

.page-faq .faq-help__key {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-teal);
}

.page-faq .faq-help__title {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-ink);
}

.page-faq .faq-help__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--faq-ink-soft);
}

.page-faq .faq-help__value {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--c-night);
  word-break: break-all;
}

.page-faq .faq-help__card .copy-btn {
  margin-top: 14px;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-closer {
  padding: clamp(24px, 4vw, 42px) 0;
  background: var(--c-deep);
  color: var(--c-snow);
}

.page-faq .faq-closer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.page-faq .faq-closer__text {
  max-width: 34em;
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-alu);
}

.page-faq .faq-totop {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--c-deep);
  background: var(--c-amber);
  border: 1px solid var(--c-amber);
  text-decoration: none;
  transition: background-color 0.16s var(--ease), border-color 0.16s var(--ease), transform 0.16s var(--ease);
}

.page-faq .faq-totop:hover {
  background: var(--c-orange);
  border-color: var(--c-orange);
  transform: translateY(-2px);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-ticks {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-item__a {
    padding-left: 40px;
    padding-right: 24px;
  }

  .page-faq .faq-help__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body__inner {
    grid-template-columns: 212px minmax(0, 1fr);
    gap: clamp(32px, 4.5vw, 68px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 34px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0;
    padding-bottom: 0;
    overflow: visible;
    border-top: 1px solid var(--c-silver);
  }

  .page-faq .faq-index__list > li {
    flex: 0 0 auto;
  }

  .page-faq .faq-index__link {
    padding: 12px 12px;
    background: transparent;
    border: none;
    border-left: 3px solid transparent;
    border-bottom: 1px solid var(--c-silver);
    white-space: normal;
  }

  .page-faq .faq-index__link[data-active="true"] {
    background: rgba(241, 237, 228, 0.9);
  }
}