.page-faq {
  --faq-grid: 80px;
  --faq-pad: 20px;
  --faq-line: rgba(30, 58, 82, 0.55);
  background-color: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-faq a:focus-visible {
  outline: 2px solid var(--gold-soft);
  outline-offset: 3px;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 104px 0 56px;
  background-color: var(--ink);
  background-image:
    linear-gradient(to right, var(--faq-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--faq-line) 1px, transparent 1px);
  background-size: var(--faq-grid) var(--faq-grid);
  background-position: center top;
}

.page-faq .faq-hero .shell {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 var(--faq-pad);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 32px;
}

.page-faq .faq-hero__title {
  margin: 14px 0 18px;
  font-family: var(--font-head);
  font-size: clamp(36px, 8.4vw, 78px);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 24px;
  background: var(--line);
  border-top: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
}

.page-faq .faq-fact {
  background: var(--ink);
  padding: 14px 12px;
}

.page-faq .faq-fact__num {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(24px, 5vw, 34px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--gold);
  line-height: 1.1;
}

.page-faq .faq-fact__label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--grey);
}

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

.page-faq .faq-hero__media .note-hand {
  margin-top: 12px;
}

.page-faq .faq-scale {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 10px;
  background-image: repeating-linear-gradient(
    to right,
    var(--gold) 0,
    var(--gold) 1px,
    transparent 1px,
    transparent 24px
  );
  opacity: 0.55;
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-part .shell {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 var(--faq-pad);
}

.page-faq .faq-h2 {
  margin: 8px 0 10px;
  font-family: var(--font-head);
  font-size: clamp(25px, 5.2vw, 42px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-sub {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey);
}

/* ---------- 分区导航 ---------- */
.page-faq .faq-nav {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-nav__card {
  display: block;
  height: 100%;
  padding: 20px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  color: var(--paper);
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-nav__card:hover {
  background: #18324a;
  border-left-color: var(--gold-soft);
  transform: translateY(-2px);
}

.page-faq .faq-nav__num {
  display: block;
  font-family: var(--font-head);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  letter-spacing: -0.02em;
}

.page-faq .faq-nav__name {
  display: block;
  margin: 10px 0 6px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-faq .faq-nav__desc {
  display: block;
  font-size: 13px;
  line-height: 1.7;
  color: var(--grey);
}

/* ---------- 对照区 ---------- */
.page-faq .qa-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 8px;
}

.page-faq .qa-filter__chip {
  padding: 7px 12px;
  border: 1px solid var(--line);
  background: rgba(19, 41, 61, 0.6);
  color: var(--grey);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa-filter__chip:hover {
  color: var(--paper);
  border-color: var(--celadon);
}

.page-faq .qa-group {
  margin-top: 34px;
  scroll-margin-top: 96px;
}

.page-faq .qa-group__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--gold);
}

.page-faq .qa-group__name {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(19px, 3.4vw, 26px);
  font-weight: 700;
  letter-spacing: 0;
  color: var(--paper);
}

.page-faq .qa-group__count {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--celadon);
  white-space: nowrap;
}

.page-faq .qa-row {
  display: grid;
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.page-faq .qa-row__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 8px;
}

.page-faq .qa-row__code {
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-faq .qa-row__q {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(18px, 3.2vw, 22px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0;
  color: var(--paper);
}

.page-faq .qa-row__answer {
  padding-left: 16px;
  border-left: 1px solid var(--line);
}

.page-faq .qa-row__answer p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.92;
}

.page-faq .qa-row__ref {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--grey) !important;
  opacity: 1 !important;
}

/* ---------- 时间账 ---------- */
.page-faq .timing-grid {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

.page-faq .timing-list {
  border-top: 1px solid var(--line);
}

.page-faq .timing-row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .timing-row__k {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--gold-soft);
}

.page-faq .timing-row__v {
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.9;
}

.page-faq .timing-row__ref {
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--cinnabar);
}

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

.page-faq .faq-figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--grey);
}

/* ---------- 会员权益表 ---------- */
.page-faq .tier-table {
  margin-top: 26px;
  border: 1px solid var(--line);
  background: rgba(19, 41, 61, 0.55);
}

.page-faq .tier-head {
  display: none;
}

.page-faq .tier-row {
  display: block;
  padding: 16px 16px 6px;
  border-bottom: 1px solid var(--line);
}

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

.page-faq .tier-cell {
  display: block;
  padding: 8px 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.92;
}

.page-faq .tier-cell--key {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--gold);
  opacity: 1;
  padding-bottom: 4px;
}

.page-faq .tier-cell__k {
  display: block;
  margin-bottom: 2px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--celadon);
}

.page-faq .faq-foot-note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cinnabar);
  font-size: 14px;
  line-height: 1.85;
  color: var(--grey);
}

/* ---------- 版本时间轴 ---------- */
.page-faq .faq-timeline {
  list-style: none;
  margin: 28px 0 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-faq .faq-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}

.page-faq .faq-tl-item {
  position: relative;
  padding: 0 0 26px;
}

.page-faq .faq-tl-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 13px;
  height: 13px;
  background: var(--ink);
  border: 1px solid var(--gold);
}

.page-faq .faq-tl-item[data-active]::before {
  background: var(--gold);
  border-color: var(--gold-soft);
}

.page-faq .faq-tl__ver {
  display: block;
  font-family: var(--font-head);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--cinnabar);
}

.page-faq .faq-tl-item[data-active] .faq-tl__ver {
  color: var(--gold);
}

.page-faq .faq-tl__name {
  margin: 8px 0 6px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--paper);
}

.page-faq .faq-tl-item p {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--grey);
}

.page-faq .faq-tip {
  margin-top: 8px;
  padding: 20px 18px;
  background: var(--panel);
  border-left: 3px solid var(--celadon);
}

.page-faq .faq-tip p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.92;
}

/* ---------- 收尾入口 ---------- */
.page-faq .faq-cta {
  padding: 30px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--cinnabar);
}

.page-faq .faq-cta__title {
  margin: 10px 0 12px;
  font-family: var(--font-head);
  font-size: clamp(23px, 4.6vw, 36px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-cta__text {
  max-width: 66ch;
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--grey);
}

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

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .qa-row {
    grid-template-columns: 200px minmax(0, 1fr);
    column-gap: 24px;
  }

  .page-faq .timing-row {
    grid-template-columns: 180px minmax(0, 1fr) 90px;
    column-gap: 20px;
    align-items: baseline;
  }

  .page-faq .timing-row__ref {
    text-align: right;
  }
}

@media (min-width: 900px) {
  .page-faq {
    --faq-pad: 32px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-hero__media {
    padding-top: 40px;
  }

  .page-faq .section-head {
    max-width: 74ch;
  }

  .page-faq .qa-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: 0;
  }

  .page-faq .qa-row__ask {
    padding-right: 30px;
  }

  .page-faq .qa-row__answer {
    padding-left: 30px;
    border-left: 1px solid var(--line);
  }

  .page-faq .timing-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-timeline {
    padding-left: 40px;
  }

  .page-faq .faq-tl-item::before {
    left: -40px;
  }

  .page-faq .faq-timeline::before {
    left: 9px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-nav {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .tier-head {
    display: grid;
    grid-template-columns: 1.1fr repeat(3, minmax(0, 1fr));
    background: var(--panel);
    border-bottom: 1px solid var(--gold);
  }

  .page-faq .tier-head .tier-cell {
    padding: 14px 16px;
    font-family: var(--font-head);
    font-size: 15px;
    font-weight: 700;
    color: var(--gold-soft);
    opacity: 1;
    border-left: 1px solid var(--line);
  }

  .page-faq .tier-head .tier-cell--key {
    border-left: 0;
    color: var(--grey);
  }

  .page-faq .tier-row {
    display: grid;
    grid-template-columns: 1.1fr repeat(3, minmax(0, 1fr));
    padding: 0;
  }

  .page-faq .tier-row .tier-cell {
    padding: 16px;
    border-left: 1px solid var(--line);
    opacity: 0.92;
  }

  .page-faq .tier-row .tier-cell:first-child {
    border-left: 0;
  }

  .page-faq .tier-row .tier-cell--key {
    font-family: var(--font-head);
    font-size: 16px;
    font-weight: 700;
    color: var(--gold);
    opacity: 1;
  }

  .page-faq .tier-cell__k {
    display: none;
  }

  .page-faq .faq-cta {
    padding: 44px 40px;
  }
}