.page-faq {
  --faq-panel: #FFFFFF;
  --faq-tint: rgba(27, 111, 168, .06);
  background: var(--snow);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-head {
  padding: clamp(1.25rem, 3.5vw, 2.25rem) 0 clamp(1.5rem, 4vw, 2.75rem);
}

.page-faq .faq-head__grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.page-faq .faq-head__title {
  margin: .55rem 0 0;
  max-width: 22ch;
}

.page-faq .faq-head__lede {
  margin-top: 1.1rem;
  max-width: 58ch;
}

.page-faq .faq-head__sub {
  margin: .85rem 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey);
}

.page-faq .faq-head__aside {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.page-faq .faq-head__bar {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 8px;
  flex: none;
}

.page-faq .faq-head__bar i {
  display: block;
  height: 18px;
  border-radius: 1px;
}

.page-faq .faq-head__bar i:nth-child(1) { background: var(--flag-blue); }
.page-faq .faq-head__bar i:nth-child(2) { background: var(--snow); border: 1px solid var(--line); }
.page-faq .faq-head__bar i:nth-child(3) { background: var(--flag-red); }
.page-faq .faq-head__bar i:nth-child(4) { background: var(--flag-green); }
.page-faq .faq-head__bar i:nth-child(5) { background: var(--flag-yellow); }

.page-faq .faq-head__folio {
  margin: 0;
  color: var(--grey);
}

@media (max-width: 899px) {
  .page-faq .faq-head__folio {
    writing-mode: horizontal-tb;
    letter-spacing: .16em;
  }
}

/* ---------- 步骤胶囊 ---------- */
.page-faq .jump {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .jump__item {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem .95rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--faq-panel);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: border-color .2s ease, color .2s ease, transform .2s ease;
}

.page-faq .jump__item:hover {
  border-color: var(--sky);
  color: var(--sky);
  transform: translateY(-2px);
}

.page-faq .jump__idx {
  font-size: 12px;
  font-weight: 900;
  color: var(--sky);
}

.page-faq .jump li:nth-child(2) .jump__idx { color: var(--flag-red); }
.page-faq .jump li:nth-child(3) .jump__idx { color: var(--flag-green); }
.page-faq .jump li:nth-child(4) .jump__idx { color: var(--flag-yellow); }

/* ---------- 四步自查 ---------- */
.page-faq .steps {
  padding: clamp(1.25rem, 3.5vw, 2rem) 0 clamp(2rem, 5vw, 3.25rem);
}

.page-faq .steps__lead {
  display: grid;
  gap: 1.5rem;
}

.page-faq .steps__text p {
  margin: .85rem 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey);
}

.page-faq .steps__text a {
  color: var(--sky);
}

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

.page-faq .step-track {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.page-faq .step {
  position: relative;
  padding: 1.3rem 1.15rem 1.4rem;
  background: var(--faq-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.page-faq .step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.page-faq .step:nth-child(1)::before { background: var(--flag-blue); }
.page-faq .step:nth-child(2)::before { background: var(--flag-red); }
.page-faq .step:nth-child(3)::before { background: var(--flag-green); }
.page-faq .step:nth-child(4)::before { background: var(--flag-yellow); }

.page-faq .step__num {
  display: block;
  font-size: clamp(2.4rem, 7vw, 3.2rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--sky);
  font-variant-numeric: tabular-nums;
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-faq .step__num {
    color: transparent;
    -webkit-text-stroke: 1.5px var(--sky);
  }
}

.page-faq .step__title {
  margin: .55rem 0 .6rem;
  font-size: 1.05rem;
  font-weight: 800;
}

.page-faq .step__body {
  margin: 0 0 .75rem;
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .step__note {
  margin: 0 0 .4rem;
  font-size: 13px;
  line-height: 1.7;
  color: var(--grey);
}

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

.page-faq .step__label {
  display: inline-block;
  margin-right: .4rem;
  padding: .05rem .35rem;
  border-radius: 1px;
  background: var(--faq-tint);
  color: var(--sky);
  font-weight: 700;
}

/* ---------- 报错对照 ---------- */
.page-faq .errors {
  padding: clamp(2.15rem, 5vw, 3.4rem) 0;
  margin-top: clamp(1.25rem, 3.5vw, 2.25rem);
  background: var(--indigo);
  color: #fff;
}

.page-faq .errors .eyebrow {
  color: var(--flag-yellow);
}

.page-faq .errors__title {
  margin: .5rem 0 0;
  max-width: 20ch;
  color: #fff;
}

.page-faq .errors__note {
  margin: 1rem 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .78);
}

.page-faq .err-figure {
  margin: 1.75rem 0 0;
}

.page-faq .err-figure .media-frame__caption {
  color: rgba(255, 255, 255, .6);
}

.page-faq .err-table {
  margin-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, .22);
}

.page-faq .err-row {
  display: grid;
  gap: .5rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, .16);
}

.page-faq .err-code {
  margin: 0;
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
  font-size: 14px;
  line-height: 1.6;
  color: var(--flag-yellow);
  word-break: break-word;
}

.page-faq .err-act {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .92);
}

.page-faq .err-act a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .err-need {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .62);
}

.page-faq .err-key {
  display: inline-block;
  margin-right: .4rem;
  color: rgba(255, 255, 255, .45);
}

/* ---------- 原因分组 ---------- */
.page-faq .causes {
  padding: clamp(2rem, 5vw, 3.4rem) 0;
}

.page-faq .causes__lead {
  margin: .9rem 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey);
}

.page-faq .causes .tabs {
  margin-top: 1.75rem;
}

.page-faq .tablist {
  display: inline-flex;
  gap: .25rem;
  padding: .25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--faq-panel);
}

.page-faq .tab {
  border: 0;
  padding: .5rem 1.15rem;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--grey);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease;
}

.page-faq .tab[aria-selected="true"] {
  background: var(--sky);
  color: #fff;
}

.page-faq .tab:focus-visible {
  outline: 2px solid var(--flag-yellow);
  outline-offset: 2px;
}

.page-faq .tabpanel {
  animation: faqPanelIn .2s ease both;
}

.page-faq .cause-grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.page-faq .cause {
  padding-left: 1rem;
  border-left: 3px solid var(--flag-blue);
}

.page-faq .cause:nth-child(2) { border-left-color: var(--flag-yellow); }
.page-faq .cause:nth-child(3) { border-left-color: var(--flag-green); }
.page-faq .cause:nth-child(4) { border-left-color: var(--flag-red); }

.page-faq .cause__title {
  margin: 0 0 .35rem;
  font-size: 1rem;
  font-weight: 800;
}

.page-faq .cause__text {
  margin: 0 0 .45rem;
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .cause__fix {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--grey);
}

.page-faq .cause__fix::before {
  content: "建议：";
  color: var(--sky);
  font-weight: 700;
}

@keyframes faqPanelIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  padding: clamp(1.5rem, 4vw, 2.75rem) 0;
}

.page-faq .qa__group + .qa__group {
  margin-top: clamp(2rem, 5vw, 3rem);
}

.page-faq .qa__note {
  margin: .85rem 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey);
}

.page-faq .qa__note a {
  color: var(--sky);
}

.page-faq .qa__list {
  margin-top: 1.4rem;
}

.page-faq .faq-q {
  margin-bottom: .75rem;
  background: var(--faq-panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .2s ease, box-shadow .2s ease;
}

.page-faq .faq-q[open] {
  border-left-color: var(--flag-green);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-q summary {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: 1rem 1.15rem;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-q summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-weight: 900;
  color: var(--sky);
}

.page-faq .faq-q[open] summary::after {
  content: "\2212";
}

.page-faq .faq-q summary:focus-visible {
  outline: 2px solid var(--flag-yellow);
  outline-offset: -2px;
}

.page-faq .faq-q__body {
  padding: 0 1.15rem 1.1rem;
}

.page-faq .faq-q__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--grey);
}

.page-faq .faq-q__body a {
  color: var(--sky);
}

/* ---------- 反馈 ---------- */
.page-faq .help {
  padding: clamp(1.25rem, 3.5vw, 2.25rem) 0 clamp(2.5rem, 6vw, 4rem);
}

.page-faq .help__inner {
  display: grid;
  gap: 1.5rem;
  padding: clamp(1.35rem, 4vw, 2.5rem);
  background: var(--faq-tint);
  border: 1px solid var(--line);
  border-top: 3px solid var(--sky);
  border-radius: var(--radius);
}

.page-faq .help__text {
  margin: .85rem 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey);
}

.page-faq .help__text a {
  color: var(--sky);
}

.page-faq .help__list {
  margin: 1.1rem 0 0;
  padding-left: 1.15rem;
  display: grid;
  gap: .45rem;
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .help__card {
  padding: 1.25rem 1.15rem;
  background: var(--faq-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-faq .help__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--grey);
}

.page-faq .help__mail,
.page-faq .help__phone {
  margin: .25rem 0 1rem;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--sky);
  word-break: break-all;
}

.page-faq .help__meta {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--grey);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .step-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-head__grid {
    grid-template-columns: minmax(0, 9fr) minmax(0, 3fr);
    gap: 2rem;
    align-items: start;
  }

  .page-faq .faq-head__aside {
    flex-direction: row-reverse;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 1.25rem;
    padding-top: .5rem;
  }

  .page-faq .steps__lead {
    grid-template-columns: minmax(0, 1fr) minmax(0, .8fr);
    gap: 2.75rem;
    align-items: center;
  }

  .page-faq .err-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr) minmax(0, .85fr);
    gap: 1.5rem;
    align-items: start;
  }

  .page-faq .err-key {
    display: none;
  }

  .page-faq .cause-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem 2rem;
  }

  .page-faq .help__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .85fr);
    gap: 2.5rem;
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-faq .step-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.25rem;
    padding-bottom: 30px;
  }

  .page-faq .step:nth-child(even) {
    transform: translateY(26px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .tabpanel {
    animation: none;
  }

  .page-faq .jump__item,
  .page-faq .step:nth-child(even) {
    transition: none;
    transform: none;
  }
}