/* ============ 支持中心 /support/ ============ */

.page-faq {
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
  padding-bottom: clamp(40px, 6vw, 88px);
}

.page-faq .faq-sec,
.page-faq .faq-index {
  scroll-margin-top: 88px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding-top: clamp(24px, 4.5vw, 52px);
  padding-bottom: clamp(40px, 6vw, 84px);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 92%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(30, 42, 56, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 42, 56, 0.55) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 88%);
}

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

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  margin-top: 22px;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(34px, 8.4vw, 88px);
  line-height: 1.02;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__lede {
  margin: 22px 0 0;
  max-width: 40ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-hero__aside {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  align-content: start;
}

.page-faq .faq-hero__panel {
  border: 1px solid var(--line);
  border-top: 2px solid var(--green);
  background: rgba(16, 22, 32, 0.88);
  padding: 16px 16px 18px;
}

.page-faq .faq-hero__panel--amber {
  border-top-color: var(--amber);
}

.page-faq .faq-hero__panel .label {
  color: var(--mist);
}

.page-faq .faq-hero__ver {
  margin: 8px 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 6vw, 40px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--green);
}

.page-faq .faq-hero__panel--amber .faq-hero__ver {
  color: var(--amber);
}

.page-faq .faq-hero__ver small {
  font-size: 0.4em;
  margin-left: 3px;
  letter-spacing: 0.08em;
}

.page-faq .faq-hero__ver-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 问题索引条 ---------- */

.page-faq .faq-index {
  padding: 20px 0 22px;
  background: var(--ink-800);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__label {
  color: var(--mist);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 0;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

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

.page-faq .faq-index__item {
  flex: 0 0 auto;
}

.page-faq .faq-index__item + .faq-index__item {
  border-left: 1px solid var(--line);
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 16px;
  text-decoration: none;
  color: var(--paper);
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--green);
  background: rgba(124, 255, 79, 0.06);
  outline: none;
}

.page-faq .faq-index__num {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--green);
}

.page-faq .faq-index__text {
  font-size: 14px;
}

/* ---------- 章节通用 ---------- */

.page-faq .faq-sec {
  padding: clamp(48px, 7vw, 100px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-sec--last {
  padding-bottom: clamp(32px, 4vw, 56px);
}

.page-faq > .faq-sec:last-child {
  border-bottom: 0;
}

.page-faq .faq-sec__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--green);
}

.page-faq .faq-sec__index::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  margin-right: 10px;
  vertical-align: middle;
  background: var(--green);
}

.page-faq .faq-sec__title {
  margin: 12px 0 0;
  font-size: clamp(26px, 4.4vw, 46px);
  line-height: 1.14;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-faq .faq-sec__lede {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-sec__lede a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid rgba(124, 255, 79, 0.4);
}

.page-faq .faq-sec__lede a:hover {
  border-bottom-color: var(--green);
}

.page-faq .faq-sec__head {
  margin-bottom: 32px;
}

.page-faq .faq-sec__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

/* ---------- 折叠问答 ---------- */

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

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

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 0;
  background: var(--green);
  transition: height 220ms var(--ease);
  pointer-events: none;
}

.page-faq .faq-item[open]::before {
  height: 100%;
}

.page-faq .faq-item__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0 14px;
  align-items: start;
  padding: 16px 4px 16px 14px;
  cursor: pointer;
  list-style: none;
  transition: background var(--dur) var(--ease);
}

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

.page-faq .faq-item__summary:hover {
  background: rgba(124, 255, 79, 0.045);
}

.page-faq .faq-item__summary:focus-visible {
  outline: 1px solid var(--green);
  outline-offset: -2px;
}

.page-faq .faq-item__num {
  padding-top: 3px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

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

.page-faq .faq-item__q {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .faq-item__mark {
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.2;
  color: var(--green);
  transition: transform 200ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(45deg);
}

.page-faq .faq-item__body {
  padding: 0 4px 20px 14px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-item__body p {
  margin: 0 0 12px;
}

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

.page-faq .faq-item__body a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid rgba(124, 255, 79, 0.4);
}

.page-faq .faq-item__body a:hover {
  border-bottom-color: var(--green);
}

/* ---------- 图片与流程图 ---------- */

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

.page-faq .faq-league {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-league__row {
  border: 1px solid var(--line);
  border-left: 2px solid var(--blue);
  background: rgba(16, 22, 32, 0.75);
  padding: 14px 16px;
}

.page-faq .faq-league__row--accent {
  border-left-color: var(--green);
}

.page-faq .faq-league__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--blue);
  margin-bottom: 8px;
}

.page-faq .faq-league__row--accent .faq-league__tag {
  color: var(--green);
}

.page-faq .faq-league__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 更新节点时间轴 ---------- */

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

.page-faq .faq-tl__item {
  position: relative;
  padding: 0 0 26px 26px;
  border-left: 1px solid var(--line);
}

.page-faq .faq-tl__item--last {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-faq .faq-tl__dot {
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  background: var(--green);
}

.page-faq .faq-tl__item--last .faq-tl__dot {
  background: var(--amber);
}

.page-faq .faq-tl__time {
  display: block;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--green);
}

.page-faq .faq-tl__item--last .faq-tl__time {
  color: var(--amber);
}

.page-faq .faq-tl__label {
  display: block;
  margin-top: 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-tl__note {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 入口版本卡 ---------- */

.page-faq .faq-entry {
  border: 1px solid var(--line);
  background: rgba(16, 22, 32, 0.75);
  padding: 20px 18px;
}

.page-faq .faq-entry__label {
  color: var(--mist);
}

.page-faq .faq-entry__chip {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.page-faq .faq-entry__abbr {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--green);
  color: var(--on-green);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
}

.page-faq .faq-entry__ver {
  font-family: var(--font-mono);
  font-size: 24px;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-faq .faq-entry__state {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--green);
}

.page-faq .faq-entry__dot {
  width: 7px;
  height: 7px;
  background: var(--green);
  border-radius: 50%;
}

.page-faq .faq-entry__note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 继续沟通 ---------- */

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

.page-faq .faq-help__cta {
  margin: 22px 0 0;
}

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

.page-faq .faq-help__list li {
  display: grid;
  gap: 4px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-help__list .label {
  color: var(--mist);
}

.page-faq .faq-help__value {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-hero__aside {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .faq-item__summary {
    padding: 18px 6px 18px 18px;
  }

  .page-faq .faq-item__body {
    padding: 0 6px 22px 51px;
  }

  .page-faq .faq-help__list li {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: 56px;
    align-items: end;
    margin-top: 34px;
  }

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

  .page-faq .faq-index__list {
    flex-wrap: wrap;
    overflow: visible;
  }

  .page-faq .faq-sec__head {
    margin-bottom: 44px;
  }

  .page-faq .faq-sec__body {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

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

  .page-faq .faq-tl__item {
    padding: 30px 24px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .page-faq .faq-tl__item--last {
    padding-right: 0;
    border-top-color: var(--line);
  }

  .page-faq .faq-tl__dot {
    left: 0;
    top: -5px;
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item::before,
  .page-faq .faq-item__mark,
  .page-faq .faq-index__link,
  .page-faq .faq-item__summary {
    transition: none;
  }
}