.page-faq {
  --faq-cut: 16px;
  --faq-hair: rgba(185, 138, 75, 0.34);
  --faq-dim-2: #DDF0EA;
  --faq-dim-3: #F4EEE0;
  --faq-soft: rgba(230, 242, 237, 0.72);
  background: var(--porcelain);
  color: var(--ink);
}

.page-faq section[id] {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-faq .breadcrumb {
  padding-top: 18px;
  font-size: 12px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-masthead {
  padding: 20px 0 28px;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-title {
  margin: 12px 0 0;
  max-width: 20em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 7.4vw, 44px);
  line-height: 1.24;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-faq .faq-masthead .lede {
  margin-top: 16px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .faq-masthead .meta-row {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--copper);
}

.page-faq .quick-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-faq .qi-link {
  display: inline-block;
  padding: 8px 13px 8px 11px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--deep-aqua);
  text-decoration: none;
  background: var(--faq-soft);
  border-left: 2px solid var(--aqua);
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .qi-link:hover,
.page-faq .qi-link:focus-visible {
  background: var(--aqua);
  color: #FFFFFF;
}

/* ---------- 三步 ---------- */

.page-faq .faq-steps .section-head {
  margin-bottom: 6px;
}

.page-faq .step-strip {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-faq .step-card {
  position: relative;
  padding: 20px 18px 22px;
  background: #FFFFFF;
  border: 1px solid var(--mist);
  border-left: 3px solid var(--aqua);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-faq .step-card:hover {
  transform: translateY(-2px);
  border-color: var(--electric);
  box-shadow: 0 6px 18px rgba(30, 124, 110, 0.08);
}

.page-faq .step-num {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--copper);
}

.page-faq .step-num::after {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--copper);
  opacity: 0.55;
}

.page-faq .step-card h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-faq .step-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

.page-faq .faq-flow {
  margin: 22px 0 0;
}

/* ---------- 标签说明 ---------- */

.page-faq .tag-layout {
  display: grid;
  gap: 22px;
  margin-top: 24px;
}

.page-faq .tag-dims {
  display: grid;
  gap: 12px;
}

.page-faq .dim-block {
  padding: 18px 18px 20px;
  border-left: 3px solid var(--aqua);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-faq .tag-dims .dim-block:nth-child(1) {
  background: var(--mist);
  border-left-color: var(--aqua);
}

.page-faq .tag-dims .dim-block:nth-child(2) {
  background: var(--faq-dim-2);
  border-left-color: var(--deep-aqua);
}

.page-faq .tag-dims .dim-block:nth-child(3) {
  background: var(--faq-dim-3);
  border-left-color: var(--copper);
}

.page-faq .dim-code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--copper);
}

.page-faq .dim-block h3 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-faq .dim-block p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-faq .faq-tag-figure {
  margin: 0;
}

.page-faq .rule-strip {
  display: grid;
  gap: 12px;
  margin-top: 24px;
  padding: 20px 18px;
  background: #FFFFFF;
  border: 1px solid var(--mist);
  border-top: 2px solid var(--copper);
}

.page-faq .rule-item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
}

.page-faq .rule-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--copper);
  padding-top: 2px;
}

.page-faq .rule-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-faq .rule-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: 0.02em;
  margin-bottom: 2px;
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-steps .section-head,
.page-faq .faq-tags .section-head,
.page-faq .faq-questions .section-head,
.page-faq .faq-trouble .section-head {
  margin-bottom: 4px;
}

.page-faq .faq-groups {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

.page-faq .faq-group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--deep-aqua);
}

.page-faq .faq-group-title .mono {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  font-size: 11px;
  letter-spacing: 0;
  color: var(--copper);
  background: #FFFFFF;
  border: 1px solid var(--faq-hair);
  border-radius: 50%;
}

.page-faq .faq-item {
  position: relative;
  background: #FFFFFF;
  border: 1px solid var(--mist);
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 8px;
}

.page-faq .faq-item[open] {
  border-color: var(--aqua);
  background: var(--faq-soft);
}

.page-faq .faq-item > summary {
  position: relative;
  display: block;
  padding: 14px 46px 14px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--ink);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 13px;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--copper);
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
  color: var(--deep-aqua);
  transform: rotate(180deg);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--electric);
  outline-offset: -2px;
}

.page-faq .faq-answer {
  margin: 0;
  padding: 0 18px 16px;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--slate);
  animation: faq-reveal 0.2s var(--ease) both;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 排障表 ---------- */

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 16px;
}

.page-faq .filter-chip {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.4;
  padding: 8px 14px;
  color: var(--deep-aqua);
  background: #FFFFFF;
  border: 1px solid var(--mist);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.12s var(--ease), color 0.12s var(--ease), border-color 0.12s var(--ease);
}

.page-faq .filter-chip:hover {
  border-color: var(--aqua);
}

.page-faq .filter-chip[aria-pressed="true"] {
  background: var(--aqua);
  border-color: var(--aqua);
  color: #FFFFFF;
}

.page-faq .trouble-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-faq .trouble-table caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--copper);
}

.page-faq .trouble-table th,
.page-faq .trouble-table td {
  text-align: left;
  vertical-align: top;
  line-height: 1.75;
}

.page-faq .trouble-table thead th {
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--copper);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .t-mark {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  vertical-align: middle;
  background: var(--vermilion);
  border-radius: 50%;
}

/* 移动端：把表拆成卡片 */

.page-faq .trouble-table thead {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}

.page-faq .trouble-table,
.page-faq .trouble-table tbody,
.page-faq .trouble-table tr,
.page-faq .trouble-table th,
.page-faq .trouble-table td {
  display: block;
  width: 100%;
}

.page-faq .trouble-table tbody tr {
  margin-bottom: 12px;
  padding: 14px 16px 16px;
  background: #FFFFFF;
  border: 1px solid var(--mist);
  border-left: 3px solid var(--vermilion);
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .trouble-table tbody tr[hidden] {
  display: none;
}

.page-faq .trouble-table tbody tr:hover {
  background: var(--faq-soft);
  border-color: var(--aqua);
}

.page-faq .trouble-table tbody th {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--ink);
  padding: 0 0 10px;
  border-bottom: 1px dashed var(--mist);
}

.page-faq .trouble-table tbody td {
  padding: 10px 0 0;
  font-size: 14px;
  color: var(--slate);
}

.page-faq .trouble-table tbody td::before {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--copper);
  margin-bottom: 4px;
}

.page-faq .trouble-table tbody td:nth-of-type(1)::before {
  content: "可能原因";
}

.page-faq .trouble-table tbody td:nth-of-type(2)::before {
  content: "建议做法";
}

/* ---------- 收束 ---------- */

.page-faq .help-panel {
  padding: 28px 20px 30px;
  background: var(--deep-ink);
  color: var(--porcelain);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-faq .help-panel .eyebrow {
  color: var(--electric);
}

.page-faq .help-panel .eyebrow::before {
  background: var(--electric);
}

.page-faq .help-title {
  margin: 12px 0 14px;
  max-width: 22em;
  font-family: var(--font-display);
  font-size: clamp(21px, 5.6vw, 30px);
  font-weight: 900;
  line-height: 1.34;
  letter-spacing: 0.02em;
  color: var(--porcelain);
}

.page-faq .help-lead {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.82;
  color: #C7D6D1;
}

.page-faq .help-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: grid;
  gap: 10px;
}

.page-faq .help-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.7;
  color: #C7D6D1;
}

.page-faq .help-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 11px;
  height: 2px;
  background: var(--electric);
}

.page-faq .contact-line {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(247, 250, 248, 0.16);
  display: grid;
  gap: 14px;
}

.page-faq .contact-cell .k {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--copper);
  margin-bottom: 4px;
}

.page-faq .contact-cell .v {
  display: block;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--porcelain);
  word-break: break-all;
}

.page-faq .help-cta {
  margin-top: 24px;
}

/* ---------- 中屏 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-masthead {
    padding: 26px 0 34px;
  }

  .page-faq .step-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .step-card {
    padding: 24px 20px 26px;
  }

  .page-faq .rule-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    padding: 22px 22px;
  }

  .page-faq .rule-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .page-faq .faq-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 32px;
  }

  .page-faq .faq-group:nth-child(5) {
    grid-column: 1 / -1;
  }

  .page-faq .trouble-table thead {
    position: static;
    width: auto;
    height: auto;
    overflow: visible;
    clip-path: none;
  }

  .page-faq .trouble-table,
  .page-faq .trouble-table tbody,
  .page-faq .trouble-table tr {
    display: table;
    width: 100%;
  }

  .page-faq .trouble-table {
    display: table;
    border-collapse: collapse;
    table-layout: fixed;
  }

  .page-faq .trouble-table thead {
    display: table-header-group;
  }

  .page-faq .trouble-table tbody {
    display: table-row-group;
  }

  .page-faq .trouble-table tr {
    display: table-row;
  }

  .page-faq .trouble-table th,
  .page-faq .trouble-table td {
    display: table-cell;
    width: auto;
  }

  .page-faq .trouble-table tbody tr {
    margin: 0;
    padding: 0;
    background: transparent;
    border: 0;
    border-bottom: 1px solid var(--mist);
    border-left: 0;
    transition: background 0.18s var(--ease);
  }

  .page-faq .trouble-table tbody tr:hover {
    background: var(--mist);
    border-color: var(--mist);
  }

  .page-faq .trouble-table tbody th {
    padding: 14px 14px 14px 12px;
    border-bottom: 0;
    font-size: 14.5px;
  }

  .page-faq .trouble-table tbody td {
    padding: 14px;
    font-size: 13.5px;
  }

  .page-faq .trouble-table tbody td::before {
    display: none;
    content: none;
  }

  .page-faq .trouble-table col,
  .page-faq .trouble-table thead th:nth-child(1) {
    width: 30%;
  }

  .page-faq .trouble-table thead th:nth-child(2) {
    width: 32%;
  }

  .page-faq .trouble-table thead th:nth-child(3) {
    width: 38%;
  }
}

/* ---------- 大屏 ---------- */

@media (min-width: 1000px) {
  .page-faq .faq-title {
    max-width: 18em;
  }

  .page-faq .quick-index {
    gap: 10px;
  }

  .page-faq .tag-layout {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 34px;
    align-items: start;
  }

  .page-faq .tag-dims {
    gap: 14px;
  }

  .page-faq .dim-block {
    padding: 22px 22px 24px;
  }

  .page-faq .rule-strip {
    margin-top: 30px;
    padding: 26px 26px;
  }

  .page-faq .help-panel {
    padding: 40px 40px 44px;
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    grid-template-areas:
      "eyebrow contact"
      "title contact"
      "lead contact"
      "list cta";
    column-gap: 44px;
    align-items: start;
  }

  .page-faq .help-panel .eyebrow {
    grid-area: eyebrow;
  }

  .page-faq .help-title {
    grid-area: title;
  }

  .page-faq .help-lead {
    grid-area: lead;
  }

  .page-faq .help-list {
    grid-area: list;
  }

  .page-faq .contact-line {
    grid-area: contact;
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
  }

  .page-faq .help-cta {
    grid-area: cta;
    margin-top: 0;
    justify-self: start;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-masthead {
    padding-bottom: 38px;
  }

  .page-faq .faq-answer,
  .page-faq .help-lead {
    font-size: 15px;
  }
}