.page-faq {
  --faq-line: rgba(44, 74, 110, 0.45);
  --faq-shadow: 6px 6px 0 var(--line);
  --faq-text: #23384f;
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .guide-hero {
  position: relative;
  padding: 26px 0 40px;
  background: var(--deep);
  border-bottom: var(--bd-heavy) solid var(--line);
  overflow: hidden;
}

.page-faq .guide-hero::after {
  content: "SUPPORT";
  position: absolute;
  right: -0.06em;
  bottom: -0.3em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(4.6rem, 19vw, 13rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: rgba(255, 255, 255, 0.05);
  pointer-events: none;
}

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.6);
}

.page-faq .breadcrumbs li::after {
  content: "/";
  margin-left: 8px;
  color: var(--coral);
}

.page-faq .breadcrumbs li:last-child::after {
  content: "";
}

.page-faq .breadcrumbs a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
}

.page-faq .breadcrumbs a:hover {
  color: var(--mint);
}

.page-faq .guide-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-faq .guide-hero h1 {
  margin: 0.3em 0 0.5em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 8vw, 3.9rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .guide-hero__lead {
  max-width: 62ch;
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.82);
}

.page-faq .hot-links {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .hot-links a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding-bottom: 9px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.26);
  color: var(--white);
  font-size: 0.92rem;
  line-height: 1.6;
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.page-faq .hot-links a:hover {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

.page-faq .hot-links .mono {
  flex: 0 0 auto;
  font-size: 0.74rem;
  color: var(--coral);
}

.page-faq .guide-stats {
  display: grid;
  gap: 12px;
}

.page-faq .guide-stat {
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.06);
  border: var(--bd) solid var(--line);
  border-left: 4px solid var(--coral);
}

.page-faq .guide-stat:nth-child(2) {
  border-left-color: var(--mint);
}

.page-faq .guide-stat:nth-child(3) {
  border-left-color: var(--amber);
}

.page-faq .guide-stat__num {
  display: block;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--white);
}

.page-faq .guide-stat__label {
  display: block;
  margin-top: 5px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.72);
}

/* ---------- 吸顶章节索引 ---------- */
.page-faq .faq-index {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--ink);
  border-bottom: var(--bd) solid var(--line);
}

.page-faq .faq-index__track {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-top: 10px;
  padding-bottom: 10px;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__track a {
  flex: 0 0 auto;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 7px 13px;
  border: var(--bd) solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.85);
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 0.79rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.page-faq .faq-index__track a:hover {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--ink);
}

.page-faq .faq-index__track .mono {
  font-size: 0.7rem;
  color: var(--amber);
}

.page-faq .faq-index__track a:hover .mono {
  color: var(--ink);
}

/* ---------- 章节头 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 70px;
}

.page-faq .faq-group__head {
  display: grid;
  gap: 14px;
  margin-bottom: 26px;
}

.page-faq .faq-group__no {
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--coral);
  border-top: var(--bd-heavy) solid currentColor;
  padding-top: 8px;
}

.page-faq .tone-mint .faq-group__no {
  color: var(--mint);
}

.page-faq .tone-amber .faq-group__no {
  color: var(--amber);
}

.page-faq .faq-group__intro {
  max-width: 66ch;
  margin: 0.5em 0 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: #33485f;
}

.page-faq .section--deep .faq-group__intro {
  color: rgba(255, 255, 255, 0.76);
}

.page-faq .section--ink .faq-group__intro {
  color: rgba(255, 255, 255, 0.76);
}

.page-faq .faq-group__media {
  margin: 0 0 26px;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 14px;
}

.page-faq .faq-item {
  background: var(--paper-light);
  border: var(--bd) solid var(--line);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-item[open] {
  border-left: 5px solid var(--coral);
}

.page-faq .faq-item__q {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 15px 16px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--coral);
  padding-top: 3px;
}

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

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin-top: 3px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
  background: var(--coral);
  transition: transform 0.18s ease, background 0.18s ease;
}

.page-faq .faq-item__mark::after {
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: rotate(0deg);
  background: var(--mint);
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--mint);
}

.page-faq .faq-item__a {
  margin: 0 16px;
  padding: 13px 0 17px;
  border-top: var(--bd) solid var(--line);
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.82;
  color: var(--faq-text);
}

/* 深色章节里的条目 */
.page-faq .faq-item.is-dark {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--line);
  box-shadow: none;
}

.page-faq .faq-item.is-dark .faq-item__q {
  color: var(--white);
}

.page-faq .faq-item.is-dark .faq-item__idx {
  color: var(--mint);
}

.page-faq .faq-item.is-dark[open] {
  border-left: 5px solid var(--mint);
}

.page-faq .faq-item.is-dark .faq-item__a {
  border-top-color: rgba(255, 255, 255, 0.2);
}

.page-faq .faq-item.is-dark .faq-item__a p {
  color: rgba(255, 255, 255, 0.8);
}

/* ---------- 换设备章节双栏 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: 26px;
}

.page-faq .faq-split__list {
  display: grid;
  gap: 14px;
}

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

/* ---------- 版本记录 ---------- */
.page-faq .log-list {
  display: grid;
  margin-bottom: 26px;
  border-top: var(--bd) solid var(--line);
}

.page-faq .log-row {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1px solid rgba(44, 74, 110, 0.55);
}

.page-faq .log-row__ver {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--amber);
}

.page-faq .log-row__date {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.62);
}

.page-faq .log-row__text {
  font-size: 0.92rem;
  line-height: 1.72;
  color: rgba(255, 255, 255, 0.86);
}

.page-faq .log-row--mark {
  background: rgba(55, 224, 176, 0.1);
  border-left: 4px solid var(--mint);
  padding-left: 12px;
}

.page-faq .log-row--mark .log-row__ver {
  color: var(--mint);
}

/* ---------- 安全卡片 ---------- */
.page-faq .safety-grid {
  display: grid;
  gap: 18px;
}

.page-faq .safety-card {
  padding: 20px 18px;
  background: var(--paper-light);
  border: var(--bd) solid var(--line);
  box-shadow: var(--faq-shadow);
}

.page-faq .safety-card__top {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: var(--bd) dashed var(--faq-line);
}

.page-faq .safety-card__tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 7px;
  background: var(--ink);
  color: var(--mint);
}

.page-faq .safety-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.08rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .safety-card ul {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .safety-card li {
  position: relative;
  padding-left: 16px;
  font-size: 0.91rem;
  line-height: 1.72;
  color: var(--faq-text);
}

.page-faq .safety-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 2px;
  background: var(--coral);
}

/* ---------- 联系客服 ---------- */
.page-faq .contact-grid {
  display: grid;
  gap: 26px;
}

.page-faq .contact-list {
  margin: 0;
}

.page-faq .contact-row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.page-faq .contact-row__key {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--mint);
}

.page-faq .contact-row__val {
  margin: 0;
  font-size: 0.97rem;
  line-height: 1.72;
  color: var(--white);
  word-break: break-word;
}

.page-faq .copy-btn {
  margin-left: 8px;
}

.page-faq .contact-note {
  padding: 20px 18px;
  background: rgba(255, 255, 255, 0.05);
  border: var(--bd) solid var(--line);
  border-left: 4px solid var(--amber);
}

.page-faq .contact-note h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .contact-note p {
  margin: 0 0 12px;
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
}

.page-faq .contact-note__btn {
  margin-top: 6px;
}

/* ---------- 相关入口 ---------- */
.page-faq .related-grid {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.page-faq .related-card {
  display: block;
  padding: 18px;
  background: var(--paper-light);
  border: var(--bd) solid var(--line);
  box-shadow: var(--faq-shadow);
  text-decoration: none;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.page-faq .related-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--coral);
}

.page-faq .related-card__title {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.02rem;
  color: var(--ink);
}

.page-faq .related-card__desc {
  display: block;
  margin-top: 7px;
  font-size: 0.85rem;
  line-height: 1.68;
  color: #3b4f66;
}

.page-faq .to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--coral);
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--ink);
  text-decoration: none;
}

.page-faq .to-top:hover {
  color: var(--coral);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .contact-row {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

  .page-faq .log-row {
    grid-template-columns: 74px 118px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-faq .faq-item__q {
    padding: 17px 20px;
    font-size: 1.03rem;
  }

  .page-faq .faq-item__a {
    margin: 0 20px;
    padding: 15px 0 19px;
  }
}

@media (min-width: 860px) {
  .page-faq .guide-hero {
    padding: 34px 0 54px;
  }

  .page-faq .guide-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    gap: 44px;
    align-items: end;
  }

  .page-faq .faq-group__head {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
    margin-bottom: 32px;
  }

  .page-faq .faq-group__no {
    font-size: 2.6rem;
  }

  .page-faq .safety-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 36px;
    align-items: start;
  }

  .page-faq .faq-split__media {
    position: sticky;
    top: 82px;
  }

  .page-faq .faq-list--two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-list--two .faq-item {
    height: 100%;
  }

  .page-faq .contact-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 40px;
    align-items: start;
  }

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

@media (min-width: 1200px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 340px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .related-card,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .hot-links a,
  .page-faq .faq-index__track a {
    transition: none;
  }

  .page-faq .related-card:hover {
    transform: none;
  }
}