.page-faq {
  --faq-answer: #C4CDDD;
  --faq-grid: rgba(34, 48, 82, 0.5);
  position: relative;
  padding-block: clamp(24px, 5vw, 56px) clamp(64px, 10vw, 120px);
  background-color: var(--ink);
  background-image:
    repeating-linear-gradient(0deg, var(--faq-grid) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(90deg, var(--faq-grid) 0 1px, transparent 1px 96px);
  color: var(--white);
}

.page-faq [id] {
  scroll-margin-top: 132px;
}

.page-faq .crumbs {
  margin-bottom: clamp(28px, 5vw, 56px);
}

/* ---------- 页头 ---------- */

.page-faq .faq-head {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  padding-bottom: clamp(36px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-head__lead .index {
  margin-bottom: 16px;
}

.page-faq .faq-head__lead .title-xl {
  margin-bottom: 20px;
  color: var(--white);
}

.page-faq .faq-head__lead .lede {
  max-width: 60ch;
  color: var(--faq-answer);
}

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

.page-faq .faq-head__stat {
  display: grid;
  gap: 4px;
  padding: 16px 14px 18px;
  background: var(--ink-2);
}

.page-faq .faq-head__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gray);
  text-transform: uppercase;
}

.page-faq .faq-head__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3.2vw, 28px);
  line-height: 1.1;
  color: var(--cyan);
}

.page-faq .faq-head__num span {
  margin-left: 4px;
  font-size: 13px;
  color: var(--gray);
}

.page-faq .faq-head__note {
  margin: 0;
  font-size: 12px;
  color: var(--gray);
}

/* ---------- 通用区块 ---------- */

.page-faq .faq-block {
  padding-block: clamp(40px, 7vw, 80px);
}

.page-faq .faq-block__head {
  max-width: 64ch;
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-faq .faq-block__head .index {
  margin-bottom: 12px;
}

.page-faq .faq-block__head .title-l {
  margin-bottom: 16px;
  color: var(--white);
}

.page-faq .faq-block__head .prose {
  color: var(--faq-answer);
}

/* ---------- 三步自查 ---------- */

.page-faq .check-wrap {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .check-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .check-item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 14px;
  padding: clamp(16px, 2.4vw, 22px);
  border: 1px solid var(--line);
  background: var(--ink-2);
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-faq .check-item__box {
  -webkit-appearance: none;
  appearance: none;
  position: relative;
  width: 22px;
  height: 22px;
  margin: 3px 0 0;
  border: 1px solid var(--line);
  background: var(--ink);
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease);
}

.page-faq .check-item__box::after {
  content: "";
  position: absolute;
  inset: 5px;
  background: var(--cyan);
  transform: scale(0);
  transform-origin: center;
  transition: transform var(--t-fast) var(--ease);
}

.page-faq .check-item__box:checked {
  border-color: var(--cyan);
}

.page-faq .check-item__box:checked::after {
  transform: scale(1);
}

.page-faq .check-item:has(.check-item__box:checked) {
  border-color: rgba(43, 227, 200, 0.5);
  background: rgba(43, 227, 200, 0.05);
}

.page-faq .check-item__body {
  display: grid;
  gap: 6px;
  cursor: pointer;
}

.page-faq .check-item__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gray);
}

.page-faq .check-item__title {
  font-size: clamp(16px, 1.8vw, 18px);
  font-weight: 600;
  color: var(--white);
}

.page-faq .check-item__desc {
  font-size: 15px;
  line-height: 1.9;
  color: var(--faq-answer);
}

.page-faq .check-side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .check-meter {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.page-faq .check-meter__dot {
  height: 4px;
  background: var(--line);
  transition: background var(--t-mid) var(--ease);
}

.page-faq .check-wrap:has(#check-version:checked) .check-meter__dot--1,
.page-faq .check-wrap:has(#check-compare:checked) .check-meter__dot--2,
.page-faq .check-wrap:has(#check-network:checked) .check-meter__dot--3 {
  background: var(--cyan);
}

.page-faq .check-meter__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gray);
}

.page-faq .check-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

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

/* ---------- 问答布局 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  padding-block: clamp(40px, 7vw, 80px);
  border-top: 1px solid var(--line);
}

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

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

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  padding: 13px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--white);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), padding-left var(--t-fast) var(--ease);
}

.page-faq .faq-index__link .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
  transition: color var(--t-fast) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan);
  background: rgba(43, 227, 200, 0.06);
  padding-left: 20px;
}

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

.page-faq .faq-index__aside {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--gray);
}

.page-faq .faq-index__aside .btn--quiet {
  font-size: 13px;
}

/* ---------- 问题分组 ---------- */

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

.page-faq .faq-group {
  padding-top: clamp(24px, 4vw, 36px);
  margin-bottom: clamp(36px, 6vw, 60px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__head {
  display: grid;
  gap: 6px;
  margin-bottom: 8px;
}

.page-faq .faq-group__head .title-m {
  margin: 0;
  color: var(--white);
}

.page-faq .faq-group__desc {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--gray);
}

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

.page-faq .qa:first-of-type {
  border-top: 1px solid var(--line);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) 18px;
  gap: 14px;
  align-items: center;
  padding: 20px 2px;
  cursor: pointer;
  list-style: none;
  transition: background var(--t-fast) var(--ease);
}

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

.page-faq .qa__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
  transition: color var(--t-fast) var(--ease);
}

.page-faq .qa__text {
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--white);
}

.page-faq .qa__sign {
  position: relative;
  width: 14px;
  height: 14px;
  justify-self: end;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform var(--t-mid) var(--ease);
}

.page-faq .qa__sign::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1px;
}

.page-faq .qa__sign::after {
  left: 6px;
  top: 0;
  width: 1px;
  height: 14px;
}

.page-faq .qa[open] .qa__sign::after {
  transform: scaleY(0);
}

.page-faq .qa[open] .qa__idx {
  color: var(--orange);
}

.page-faq .qa__q:hover .qa__text,
.page-faq .qa__q:focus-visible .qa__text {
  color: var(--cyan);
}

.page-faq .qa__a {
  padding: 0 0 24px 70px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--faq-answer);
  border-left: 0;
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 62ch;
}

/* ---------- 提示带 ---------- */

.page-faq .faq-note {
  display: grid;
  gap: 10px;
  padding: clamp(18px, 3vw, 26px) clamp(18px, 3vw, 28px);
  margin-bottom: clamp(36px, 6vw, 60px);
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  background: linear-gradient(90deg, rgba(255, 106, 26, 0.08), rgba(14, 59, 58, 0.32));
}

.page-faq .faq-note .index {
  margin: 0;
}

.page-faq .faq-note__text {
  margin: 0;
  max-width: 82ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--white);
}

/* ---------- 联系客服 ---------- */

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

.page-faq .contact-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-faq .contact-copy .prose {
  color: var(--faq-answer);
  margin-bottom: 24px;
}

.page-faq .contact-lines {
  display: grid;
  gap: 1px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .contact-line {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  background: var(--ink-2);
}

.page-faq .contact-line .index {
  margin: 0;
}

.page-faq .contact-line__value {
  font-size: 15px;
  line-height: 1.7;
  color: var(--white);
  word-break: break-word;
}

.page-faq .contact-line__value.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-faq .contact-figure {
  margin: 0;
  border: 1px dashed var(--line);
  padding: 12px;
  background: rgba(19, 26, 46, 0.6);
}

.page-faq .contact-figure .media__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray);
}

/* ---------- 收尾带 ---------- */

.page-faq .faq-tail {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-tail__lead .index {
  margin-bottom: 8px;
}

.page-faq .faq-tail__lead .title-m {
  margin: 0;
  color: var(--white);
}

.page-faq .faq-tail__links {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-tail__link {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 16px 18px;
  background: var(--ink-2);
  color: var(--white);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-faq .faq-tail__link .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray);
}

.page-faq .faq-tail__link:hover,
.page-faq .faq-tail__link:focus-visible {
  color: var(--cyan);
  background: rgba(43, 227, 200, 0.07);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .contact-lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .contact-line:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-head {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    align-items: end;
  }
  .page-faq .faq-head__stats {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-faq .check-wrap {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
  .page-faq .contact-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }
  .page-faq .faq-tail {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.6fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 118px;
  }
  .page-faq .qa__a {
    padding-right: 32px;
  }
}

@media (max-width: 560px) {
  .page-faq .qa__q {
    grid-template-columns: 46px minmax(0, 1fr) 16px;
    gap: 10px;
  }
  .page-faq .qa__a {
    padding-left: 0;
    padding-bottom: 20px;
  }
  .page-faq .faq-index__link {
    grid-template-columns: 40px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .check-item,
  .page-faq .check-meter__dot,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after,
  .page-faq .faq-index__link,
  .page-faq .faq-tail__link {
    transition: none;
  }
}