/* ===== 帮助中心 /faqs/ 页面专属样式 ===== */

.page-faq {
  display: block;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-top: clamp(84px, 14vw, 118px);
}
.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--ink-faint);
}
.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--gold-600);
}
.page-faq .breadcrumb a {
  color: var(--ink-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 200ms var(--ease-out), color 200ms var(--ease-out);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--ink-text);
  border-bottom-color: var(--gold-600);
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--ink-text);
  font-weight: 700;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(20px, 3vw, 36px) 0 clamp(56px, 8vw, 96px);
}
.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 56px);
  align-items: start;
}
.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-72);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 14px 0 22px;
  max-width: 15ch;
}
.page-faq .faq-hero__note {
  margin: 20px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold-600);
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--ink-muted);
  max-width: 60ch;
}
.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-hero__quick a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 18px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-pill);
  background: var(--paper-50);
  color: var(--ink-text);
  font-size: var(--fs-14);
  font-weight: 600;
  text-decoration: none;
  transition: border-color 200ms var(--ease-out), background 200ms var(--ease-out), transform 200ms var(--ease-out);
}
.page-faq .faq-hero__quick a span {
  font-family: var(--font-num);
  font-size: var(--fs-12);
  color: var(--gold-600);
  letter-spacing: 0.04em;
}
.page-faq .faq-hero__quick a:hover,
.page-faq .faq-hero__quick a:focus-visible {
  border-color: var(--gold-600);
  background: rgba(192, 138, 46, 0.1);
  transform: translateY(-2px);
}
.page-faq .faq-hero__figure {
  margin: 0;
}
.page-faq .figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 故障树 ---------- */
.page-faq .faq-branches {
  padding-bottom: clamp(64px, 9vw, 116px);
}
.page-faq .faq-tree {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(28px, 4vw, 44px);
}
.page-faq .faq-branch {
  position: relative;
  background: var(--paper-50);
  border: 1px solid var(--line-light);
  border-left: 3px solid var(--gold-600);
  transition: border-color 220ms var(--ease-out), box-shadow 220ms var(--ease-out);
}
.page-faq .faq-branch:hover {
  border-left-color: var(--gold-300);
  box-shadow: 0 0 0 1px rgba(192, 138, 46, 0.22);
}
.page-faq .faq-branch[open] {
  border-left-color: var(--gold-300);
}
.page-faq .faq-branch__head {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 26px;
  align-items: center;
  gap: 4px 14px;
  padding: clamp(18px, 2.6vw, 24px) clamp(16px, 2.6vw, 28px);
  cursor: pointer;
  list-style: none;
}
.page-faq .faq-branch__head::-webkit-details-marker {
  display: none;
}
.page-faq .faq-branch__head:focus-visible {
  outline: 2px solid var(--blue-500);
  outline-offset: -3px;
}
.page-faq .faq-branch__no {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: center;
  font-family: var(--font-num);
  font-size: var(--fs-22);
  color: var(--gold-600);
  letter-spacing: 0.02em;
}
.page-faq .faq-branch__name {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-22);
  line-height: 1.2;
  color: var(--ink-text);
}
.page-faq .faq-branch__hint {
  grid-column: 2;
  grid-row: 2;
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--ink-muted);
}
.page-faq .faq-branch__mark {
  grid-column: 3;
  grid-row: 1 / span 2;
  align-self: center;
  justify-self: end;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-light);
  border-radius: 50%;
  color: var(--gold-600);
  font-family: var(--font-num);
  font-size: var(--fs-14);
  line-height: 1;
}
.page-faq .faq-branch__mark::before {
  content: "+";
}
.page-faq .faq-branch[open] .faq-branch__mark::before {
  content: "\2212";
}
.page-faq .faq-branch__body {
  padding: 0 clamp(16px, 2.6vw, 28px) clamp(20px, 2.8vw, 28px) clamp(16px, 2.6vw, 28px);
  border-top: 1px dashed var(--line-light);
  margin-top: 2px;
  padding-top: clamp(16px, 2.2vw, 22px);
}
.page-faq .faq-branch__body p {
  margin: 0 0 14px;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--ink-muted);
  max-width: 68ch;
}
.page-faq .faq-tips {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}
.page-faq .faq-tips li {
  position: relative;
  padding-left: 20px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--ink-text);
}
.page-faq .faq-tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 9px;
  height: 9px;
  background: var(--gold-300);
}
.page-faq .faq-tips b {
  color: var(--ink-text);
  font-weight: 800;
}
.page-faq .faq-branches__foot {
  margin: clamp(28px, 4vw, 40px) 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ink-muted);
}
.page-faq .faq-branches__foot a {
  color: var(--blue-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(42, 91, 224, 0.4);
}
.page-faq .faq-branches__foot a:hover,
.page-faq .faq-branches__foot a:focus-visible {
  border-bottom-color: var(--blue-500);
}

/* ---------- 三步排查 ---------- */
.page-faq .faq-steps__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 4vw, 48px);
  align-items: start;
  margin-top: clamp(32px, 4vw, 48px);
}
.page-faq .faq-steps__flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-faq .step-card {
  position: relative;
}
.page-faq .step-card__check {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: 0;
  pointer-events: none;
}
.page-faq .step-card__surface {
  position: relative;
  display: block;
  padding: clamp(22px, 3vw, 30px) clamp(20px, 3vw, 30px) clamp(20px, 2.6vw, 26px) clamp(64px, 6vw, 92px);
  background: var(--paper-200);
  border: 1px solid var(--line-light);
  border-left: 3px solid var(--line-light);
  transition: border-color 240ms var(--ease-out), background 240ms var(--ease-out), transform 240ms var(--ease-out);
}
.page-faq .step-card__surface:hover {
  transform: translateY(-2px);
}
.page-faq .step-card__check:checked + .step-card__surface {
  border-left-color: var(--green-500);
  background: var(--paper-50);
}
.page-faq .step-card__check:focus-visible + .step-card__surface {
  outline: 2px solid var(--blue-500);
  outline-offset: 2px;
}
.page-faq .step-card__num {
  position: absolute;
  top: clamp(18px, 2.4vw, 24px);
  left: clamp(16px, 2.2vw, 24px);
  font-family: var(--font-num);
  font-size: clamp(34px, 5.4vw, 48px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold-600);
}
.page-faq .step-card__check:checked + .step-card__surface .step-card__num {
  color: var(--green-500);
}
.page-faq .step-card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-22);
  line-height: 1.25;
  color: var(--ink-text);
}
.page-faq .step-card__body {
  margin: 0 0 12px;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--ink-muted);
  max-width: 60ch;
}
.page-faq .step-card__expect {
  margin: 0;
  padding: 10px 14px;
  background: rgba(11, 12, 14, 0.04);
  border-left: 2px solid var(--blue-500);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--ink-text);
}
.page-faq .step-card__expectkey {
  display: block;
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--blue-500);
  margin-bottom: 3px;
}
.page-faq .step-card__tick {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--ink-muted);
  cursor: pointer;
  user-select: none;
}
.page-faq .step-card__tickbox {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  border: 1px solid var(--ink-faint);
  background: transparent;
  transition: background 200ms var(--ease-out), border-color 200ms var(--ease-out);
}
.page-faq .step-card__check:checked + .step-card__surface .step-card__tickbox {
  background: var(--green-500);
  border-color: var(--green-500);
}
.page-faq .step-card__check:checked + .step-card__surface .step-card__tickbox::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 4px;
  width: 8px;
  height: 4px;
  border-left: 2px solid var(--paper-50);
  border-bottom: 2px solid var(--paper-50);
  transform: rotate(-45deg);
}
.page-faq .step-card__check:checked + .step-card__surface .step-card__tick {
  color: var(--green-500);
  font-weight: 700;
}
.page-faq .faq-steps__warn {
  margin: 6px 0 0;
  padding: 14px 18px;
  background: rgba(179, 68, 44, 0.08);
  border-left: 3px solid var(--rust-500);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ink-text);
}
.page-faq .faq-steps__figure {
  margin: 0;
}
.page-faq .faq-steps__figure .figure__frame {
  aspect-ratio: 4 / 5;
}
.page-faq .faq-steps__figure .figure__frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 设备与网络 ---------- */
.page-faq .faq-compat .lede {
  color: var(--paper-muted);
}
.page-faq .compat-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(32px, 4vw, 48px);
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
.page-faq .compat-cell {
  padding: clamp(24px, 3vw, 34px) clamp(20px, 2.6vw, 30px);
  background: var(--ink-700);
}
.page-faq .compat-cell__title {
  margin: 0 0 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-dark);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-22);
  line-height: 1.3;
  color: var(--gold-300);
}
.page-faq .compat-cell__text {
  margin: 0 0 14px;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--paper-muted);
}
.page-faq .compat-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}
.page-faq .compat-list li {
  position: relative;
  padding-left: 18px;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--paper-text);
}
.page-faq .compat-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--gold-600);
}

/* ---------- 反馈与联系 ---------- */
.page-faq .feedback-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 4vw, 52px);
  align-items: start;
}
.page-faq .checklist {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(28px, 3.6vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}
.page-faq .checklist__item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 3px 14px;
  align-items: start;
  padding: 16px 18px;
  background: var(--paper-50);
}
.page-faq .checklist__box {
  grid-row: 1 / span 2;
  width: 16px;
  height: 16px;
  margin-top: 4px;
  border: 1px solid var(--ink-faint);
  border-radius: 0;
}
.page-faq .checklist__label {
  font-family: var(--font-num);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--gold-600);
}
.page-faq .checklist__desc {
  font-size: var(--fs-17);
  line-height: 1.7;
  color: var(--ink-text);
}
.page-faq .feedback-note {
  margin: 20px 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ink-muted);
}
.page-faq .feedback-note a {
  color: var(--blue-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(42, 91, 224, 0.4);
}
.page-faq .feedback-note a:hover,
.page-faq .feedback-note a:focus-visible {
  border-bottom-color: var(--blue-500);
}
.page-faq .contact-card {
  padding: clamp(24px, 3vw, 34px) clamp(20px, 2.6vw, 30px);
  background: var(--ink-700);
  border-top: 3px solid var(--gold-600);
  color: var(--paper-text);
}
.page-faq .contact-card__title {
  margin: 16px 0 6px;
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  font-weight: 600;
  color: var(--paper-faint);
}
.page-faq .contact-card__value {
  margin: 0 0 12px;
  font-size: var(--fs-17);
  line-height: 1.5;
  color: var(--paper-text);
  word-break: break-all;
}
.page-faq .contact-card__value--num {
  font-family: var(--font-num);
  font-size: var(--fs-22);
  letter-spacing: 0.04em;
  color: var(--gold-300);
}
.page-faq .contact-card__copy {
  margin-bottom: 4px;
}
.page-faq .contact-card__copy.is-done {
  border-color: var(--green-500);
  color: var(--green-500);
}
.page-faq .contact-card__line {
  margin: 22px 0 18px;
}
.page-faq .contact-card__meta {
  margin: 18px 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--paper-muted);
}
.page-faq .contact-card__meta a {
  color: var(--gold-300);
  text-decoration: none;
  border-bottom: 1px solid rgba(240, 196, 98, 0.5);
}
.page-faq .contact-card__meta a:hover,
.page-faq .contact-card__meta a:focus-visible {
  border-bottom-color: var(--gold-300);
}

/* ---------- 近期条目 ---------- */
.page-faq .update-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-light);
  border-top: 1px solid var(--line-light);
}
.page-faq .update-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 4px 16px;
  align-items: start;
  padding: clamp(18px, 2.4vw, 26px) clamp(14px, 2vw, 22px);
  background: var(--paper-50);
  transition: background 200ms var(--ease-out);
}
.page-faq .update-item:hover {
  background: var(--paper-200);
}
.page-faq .update-item__index {
  grid-row: 1 / span 2;
  font-family: var(--font-num);
  font-size: var(--fs-22);
  line-height: 1.2;
  color: var(--gold-600);
}
.page-faq .update-item__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-17);
  line-height: 1.45;
  color: var(--ink-text);
}
.page-faq .update-item__desc {
  margin: 4px 0 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--ink-muted);
  max-width: 62ch;
}
.page-faq .update-item .tag {
  grid-column: 2;
  grid-row: 3;
  justify-self: start;
  margin-top: 8px;
}
.page-faq .faq-updates__foot {
  margin: clamp(26px, 3.6vw, 38px) 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ink-muted);
}
.page-faq .faq-updates__foot a {
  color: var(--blue-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(42, 91, 224, 0.4);
}
.page-faq .faq-updates__foot a:hover,
.page-faq .faq-updates__foot a:focus-visible {
  border-bottom-color: var(--blue-500);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .checklist__item {
    grid-template-columns: 20px 96px minmax(0, 1fr);
    align-items: baseline;
    gap: 0 16px;
  }
  .page-faq .checklist__box {
    grid-row: 1;
    align-self: center;
    margin-top: 0;
  }
  .page-faq .checklist__label {
    grid-column: 2;
  }
  .page-faq .checklist__desc {
    grid-column: 3;
  }
  .page-faq .update-item {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    align-items: baseline;
  }
  .page-faq .update-item__index {
    grid-row: 1;
  }
  .page-faq .update-item .tag {
    grid-column: 3;
    grid-row: 1;
    margin-top: 0;
    align-self: center;
  }
}

@media (min-width: 760px) {
  .page-faq .compat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-tips {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 26px;
  }
  .page-faq .faq-tips li:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(40px, 5vw, 72px);
  }
  .page-faq .faq-steps__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-faq .faq-steps__figure {
    position: sticky;
    top: 108px;
  }
  .page-faq .feedback-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-faq .contact-card {
    position: sticky;
    top: 108px;
  }
  .page-faq .faq-branch__head {
    grid-template-columns: 64px minmax(0, 1fr) 220px 26px;
    gap: 0 20px;
  }
  .page-faq .faq-branch__no {
    grid-row: 1;
  }
  .page-faq .faq-branch__hint {
    grid-column: 3;
    grid-row: 1;
    align-self: center;
    font-size: var(--fs-12);
    color: var(--ink-faint);
  }
  .page-faq .faq-branch__mark {
    grid-column: 4;
    grid-row: 1;
  }
  .page-faq .faq-branch__body {
    padding-left: 84px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-tips {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-tips li:first-child {
    grid-column: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__quick a,
  .page-faq .faq-branch,
  .page-faq .step-card__surface,
  .page-faq .update-item {
    transition: opacity 160ms linear;
  }
  .page-faq .faq-hero__quick a:hover,
  .page-faq .step-card__surface:hover {
    transform: none;
  }
}