.page-faq {
  --faq-cut: var(--radius-a) var(--radius-b) var(--radius-a) var(--radius-b);
  --faq-cut-sm: 10px 3px 10px 3px;
  color: var(--cream);
  padding-bottom: clamp(48px, 8vw, 104px);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-faq > .breadcrumb {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(18px, 3vw, 30px) var(--gutter) 0;
}

/* ---------- 首屏主题声明 ---------- */
.page-faq .faq-masthead {
  position: relative;
  margin-top: clamp(14px, 2.4vw, 26px);
  padding: clamp(30px, 5.4vw, 70px) var(--gutter);
  background:
    radial-gradient(130% 150% at 88% 2%, rgba(0, 230, 195, .18) 0%, transparent 56%),
    linear-gradient(148deg, var(--deep) 0%, var(--deep-2) 46%, var(--night) 100%);
  border-block: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-masthead::after {
  content: "";
  position: absolute;
  right: -12%;
  top: -38%;
  width: min(52vw, 520px);
  aspect-ratio: 1;
  background: conic-gradient(from 208deg,
      rgba(255, 107, 74, .26),
      transparent 40%,
      rgba(0, 230, 195, .26) 76%,
      transparent);
  filter: blur(8px);
  pointer-events: none;
}

.page-faq .faq-masthead__inner {
  position: relative;
  z-index: 1;
  max-width: var(--shell);
  margin-inline: auto;
}

.page-faq .faq-masthead__inner > .label {
  color: var(--cyan);
}

.page-faq .faq-masthead h1 {
  margin: 10px 0 0;
  max-width: 20ch;
  font-family: var(--font-head);
  font-size: clamp(28px, 5.4vw, 56px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.032em;
  color: var(--cream);
}

.page-faq .faq-masthead__lead {
  max-width: 74ch;
  margin: clamp(16px, 2.2vw, 22px) 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-jump {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  padding: 9px 17px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(0, 230, 195, .06);
  color: var(--cyan-soft);
  font-size: 13px;
  letter-spacing: .02em;
  text-decoration: none;
  transition: background .25s var(--ease), color .25s var(--ease),
              border-color .25s var(--ease), transform .25s var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--deep);
  transform: translateY(-2px);
}

/* ---------- 章节容器 ---------- */
.page-faq .faq-block {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(42px, 6.4vw, 82px) var(--gutter) 0;
}

.page-faq .section-head__index {
  color: var(--coral);
}

.page-faq .section-head__title {
  color: var(--cream);
  letter-spacing: -.028em;
}

.page-faq .section-head__sub {
  max-width: 62ch;
  color: var(--mist);
}

/* ---------- 快速上手 ---------- */
.page-faq .faq-start {
  display: grid;
  gap: clamp(24px, 3.2vw, 42px);
  margin-top: clamp(24px, 3.2vw, 38px);
}

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

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 18px;
  padding: clamp(18px, 2.4vw, 24px) clamp(18px, 2.4vw, 26px);
  background: linear-gradient(118deg, rgba(0, 230, 195, .09), rgba(7, 26, 51, .62) 72%);
  border: 1px solid var(--line);
  border-radius: var(--faq-cut);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}

.page-faq .faq-steps li:hover {
  border-color: rgba(0, 230, 195, .42);
  transform: translateY(-3px);
}

.page-faq .faq-steps__no {
  grid-row: 1 / span 2;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--cyan);
}

.page-faq .faq-steps h3 {
  margin: 0;
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 800;
  letter-spacing: -.012em;
  color: var(--cream);
}

.page-faq .faq-steps p {
  margin: 5px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--faq-cut);
  overflow: hidden;
  background: var(--deep-2);
}

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

.page-faq .faq-figure--android {
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 分类轨道 + 问答主体 ---------- */
.page-faq .faq-layout {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(46px, 6.4vw, 86px) var(--gutter) 0;
  display: grid;
  gap: clamp(26px, 3.4vw, 50px);
}

.page-faq .faq-side {
  padding: 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--faq-cut);
  background: linear-gradient(168deg, rgba(26, 15, 51, .78), rgba(7, 26, 51, .78));
}

.page-faq .faq-side > .label {
  color: var(--cyan);
}

.page-faq .faq-side__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-side__list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 13px;
  border: 1px solid transparent;
  border-radius: var(--faq-cut-sm);
  color: var(--mist);
  font-size: 13.5px;
  white-space: nowrap;
  text-decoration: none;
  transition: color .22s var(--ease), border-color .22s var(--ease),
              background .22s var(--ease);
}

.page-faq .faq-side__list a:hover,
.page-faq .faq-side__list a:focus-visible {
  color: var(--cyan-soft);
  border-color: rgba(0, 230, 195, .42);
  background: rgba(0, 230, 195, .07);
}

.page-faq .faq-side__list em {
  font-family: var(--font-data);
  font-style: normal;
  font-size: 11px;
  color: var(--coral);
}

.page-faq .faq-side__tip {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group + .faq-group {
  margin-top: clamp(36px, 4.8vw, 62px);
}

.page-faq .faq-group__head h2 {
  margin: 8px 0 0;
  font-size: clamp(21px, 3vw, 31px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -.028em;
  color: var(--cream);
}

.page-faq .faq-group__head .label {
  color: var(--coral);
}

.page-faq .faq-group__head p {
  max-width: 64ch;
  margin: 10px 0 0;
  font-size: 14.8px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-qa {
  margin-top: clamp(18px, 2.4vw, 26px);
  display: grid;
  gap: 10px;
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border: 1px solid var(--line);
  border-radius: var(--faq-cut);
  background: rgba(244, 239, 230, .035);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-faq .qa[open] {
  border-color: rgba(0, 230, 195, .46);
  background: rgba(0, 230, 195, .07);
}

.page-faq .qa > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: clamp(15px, 2vw, 19px) clamp(16px, 2.2vw, 22px);
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.7vw, 16.5px);
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: -.01em;
  color: var(--cream);
}

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

.page-faq .qa > summary::marker {
  content: "";
}

.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
  border-radius: var(--faq-cut);
}

.page-faq .qa__mark {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 1px;
  border: 1px solid rgba(0, 230, 195, .45);
  border-radius: 4px;
  background: rgba(0, 230, 195, .14);
  transition: background .25s var(--ease);
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  top: 50%;
  height: 2px;
  background: var(--cyan);
  transform: translateY(-50%);
  transition: transform .25s var(--ease), opacity .25s var(--ease),
              background .25s var(--ease);
}

.page-faq .qa__mark::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .qa[open] .qa__mark {
  background: var(--cyan);
}

.page-faq .qa[open] .qa__mark::before {
  background: var(--deep);
}

.page-faq .qa[open] .qa__mark::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 0 clamp(16px, 2.2vw, 22px) clamp(16px, 2.2vw, 21px);
  font-size: 14.6px;
  line-height: 1.8;
  color: var(--mist);
}

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

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

.page-faq .qa__body strong {
  font-weight: 600;
  color: var(--cyan-soft);
}

.page-faq .qa__body .num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  color: var(--coral);
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(18px, 2.4vw, 26px);
  display: grid;
  gap: 12px;
}

.page-faq .faq-contact__card {
  padding: clamp(18px, 2.2vw, 22px);
  border: 1px solid var(--line);
  border-radius: var(--faq-cut);
  background: linear-gradient(152deg, rgba(0, 230, 195, .085), rgba(7, 26, 51, .62));
}

.page-faq .faq-contact__card > .label {
  color: var(--cyan);
}

.page-faq .faq-contact__mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 10px 0 0;
  font-family: var(--font-data);
  font-size: 14px;
  line-height: 1.5;
  color: var(--cyan-soft);
  word-break: break-all;
}

.page-faq .copy-btn {
  flex: 0 0 auto;
  padding: 6px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 12px;
  cursor: pointer;
  transition: border-color .22s var(--ease), color .22s var(--ease),
              background .22s var(--ease);
}

.page-faq .copy-btn:hover,
.page-faq .copy-btn:focus-visible {
  border-color: var(--cyan);
  background: rgba(0, 230, 195, .12);
  color: var(--cyan);
}

.page-faq .faq-contact__value {
  margin: 10px 0 0;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--cream);
}

.page-faq .faq-contact__note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--mist);
}

.page-faq .faq-contact__route {
  margin: clamp(18px, 2.4vw, 24px) 0 0;
  padding: clamp(16px, 2.2vw, 20px) clamp(18px, 2.4vw, 24px);
  border-left: 3px solid var(--coral);
  background: rgba(255, 107, 74, .07);
  border-radius: 0 var(--radius-b) var(--radius-b) 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-contact__route a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-start {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-figure--steps {
    position: sticky;
    top: calc(var(--topbar-h) + 26px);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--topbar-h) + 26px);
  }

  .page-faq .faq-side__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
  }

  .page-faq .faq-side__list a {
    white-space: normal;
  }

  .page-faq .faq-side__list em {
    margin-left: auto;
    padding-left: 10px;
  }

  .page-faq .faq-group__head h2 {
    max-width: 24ch;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump a,
  .page-faq .faq-steps li,
  .page-faq .qa__mark,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .copy-btn {
    transition: none;
  }

  .page-faq .faq-jump a:hover,
  .page-faq .faq-steps li:hover {
    transform: none;
  }
}