.page-faq {
  background: var(--c-paper);
  color: var(--c-navy);
  font-family: var(--ff-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-faq a {
  color: var(--c-link);
  text-decoration: none;
  border-bottom: 1px solid rgba(27, 94, 126, .3);
}

.page-faq a:hover {
  color: var(--c-link-hover);
  border-bottom-color: var(--c-link-hover);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: 28px;
  padding-bottom: 4px;
}

.page-faq .breadcrumb {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-numeral);
  display: flex;
  gap: 10px;
  align-items: center;
}

.page-faq .breadcrumb a {
  color: var(--c-numeral);
  border-bottom: 0;
}

.page-faq .breadcrumb a:hover {
  color: var(--c-copper-deep);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: 20px;
  background: var(--c-navy);
  color: var(--c-paper);
  padding: 52px 0 64px;
  overflow: hidden;
}

.page-faq .faq-hero-shape {
  position: absolute;
  right: -14%;
  top: -40%;
  width: 68%;
  height: 190%;
  transform: rotate(15deg);
  background: linear-gradient(150deg, rgba(79, 168, 206, .30) 0%, rgba(99, 205, 170, .10) 46%, rgba(196, 103, 44, .16) 100%);
  pointer-events: none;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--grad-copper);
  opacity: .55;
}

.page-faq .faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 40px;
}

.page-faq .faq-hero-main .eyebrow {
  color: var(--c-copper-lit);
}

.page-faq .faq-hero-main h1 {
  font-family: var(--ff-serif);
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.24;
  letter-spacing: -.01em;
  margin: 16px 0 0;
  max-width: 16em;
}

.page-faq .faq-lead {
  margin-top: 22px;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(242, 244, 247, .82);
  max-width: 40em;
}

.page-faq .faq-hero-side {
  border-top: 1px solid var(--line-dark);
  padding-top: 24px;
}

.page-faq .faq-side-title {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-ice-lit);
  margin: 0 0 14px;
}

.page-faq .faq-side-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 20px;
}

.page-faq .faq-side-list li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  border-left: 2px solid rgba(226, 167, 104, .5);
  padding-left: 10px;
}

.page-faq .faq-side-num {
  font-family: var(--ff-display);
  font-size: 28px;
  line-height: 1;
  letter-spacing: .01em;
  color: var(--c-copper-lit);
}

.page-faq .faq-side-txt {
  font-size: 13px;
  color: rgba(242, 244, 247, .7);
}

.page-faq .faq-side-foot {
  margin-top: 20px;
  font-family: var(--ff-mono);
  font-size: 12px;
  color: rgba(199, 205, 214, .6);
}

/* ---------- 通用节标题 ---------- */
.page-faq .faq-sec-head {
  margin-bottom: 34px;
  max-width: 46em;
}

.page-faq .faq-sec-head h2 {
  font-family: var(--ff-serif);
  font-size: clamp(24px, 4vw, 36px);
  line-height: 1.32;
  margin: 14px 0 0;
  letter-spacing: -.005em;
}

.page-faq .faq-sec-sub {
  margin-top: 16px;
  font-size: 15.5px;
  color: rgba(14, 27, 51, .72);
  max-width: 42em;
}

.page-faq section {
  padding: 64px 0;
}

/* ---------- 适用人群 ---------- */
.page-faq .faq-people {
  background: var(--c-paper);
}

.page-faq .faq-people .eyebrow {
  color: var(--c-copper-deep);
}

.page-faq .people-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .person-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  padding: 26px 22px 24px;
  border-top: 3px solid var(--c-copper);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.page-faq .person-card--clean {
  border-top-color: var(--c-ice);
}

.page-faq .person-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(14, 27, 51, .08);
}

.page-faq .person-card .card-num {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-numeral);
  display: block;
  margin-bottom: 10px;
}

.page-faq .person-card h3 {
  font-family: var(--ff-display);
  font-size: 21px;
  letter-spacing: .02em;
  margin: 0 0 12px;
  text-transform: none;
}

.page-faq .person-who {
  font-size: 14.5px;
  color: rgba(14, 27, 51, .78);
  margin: 0 0 14px;
}

.page-faq .person-line {
  font-size: 14px;
  color: var(--c-navy);
  margin: 0 0 12px;
  padding-left: 2px;
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.page-faq .person-card--clean .person-line {
  color: #17536b;
}

.page-faq .person-card .line-dot {
  flex: 0 0 auto;
  margin-top: 8px;
}

.page-faq .person-prep {
  font-family: var(--ff-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-numeral);
  border-top: 1px dashed var(--line);
  padding-top: 12px;
  margin: 0;
}

/* ---------- 保修 ---------- */
.page-faq .faq-warranty {
  background: var(--c-ink);
  color: var(--c-paper);
}

.page-faq .faq-warranty .eyebrow {
  color: var(--c-copper-lit);
}

.page-faq .faq-warranty-grid {
  display: grid;
  gap: 40px;
}

.page-faq .faq-warranty-intro h2 {
  font-family: var(--ff-serif);
  font-size: clamp(24px, 4vw, 36px);
  line-height: 1.32;
  color: var(--c-paper);
  margin: 14px 0 0;
}

.page-faq .faq-warranty-intro p {
  margin-top: 16px;
  font-size: 15px;
  color: rgba(242, 244, 247, .74);
  max-width: 36em;
}

.page-faq .warranty-chart {
  background: rgba(199, 205, 214, .05);
  border: 1px solid var(--line-dark);
  padding: 26px 20px 22px;
}

.page-faq .warranty-axis {
  display: flex;
  justify-content: space-between;
  font-family: var(--ff-mono);
  font-size: 11px;
  color: rgba(199, 205, 214, .55);
  border-bottom: 1px solid var(--line-dark);
  padding-bottom: 8px;
  margin-bottom: 18px;
}

.page-faq .warranty-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  margin-bottom: 18px;
}

.page-faq .warranty-name {
  font-family: var(--ff-mono);
  font-size: 12.5px;
  color: rgba(242, 244, 247, .8);
}

.page-faq .warranty-track {
  display: block;
  height: 12px;
  background: rgba(199, 205, 214, .12);
  position: relative;
}

.page-faq .warranty-bar {
  display: block;
  height: 100%;
  background: var(--grad-copper);
}

.page-faq .warranty-bar--2 {
  width: 40%;
}

.page-faq .warranty-bar--5 {
  width: 100%;
  background: var(--grad-ice);
}

.page-faq .warranty-val {
  font-family: var(--ff-display);
  font-size: 19px;
  letter-spacing: .04em;
  color: var(--c-paper);
}

.page-faq .warranty-note {
  font-family: var(--ff-mono);
  font-size: 12px;
  color: rgba(199, 205, 214, .58);
  margin: 6px 0 0;
}

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

.page-faq .warranty-excl li {
  border-left: 2px solid var(--c-copper);
  padding-left: 16px;
}

.page-faq .warranty-excl h3 {
  font-family: var(--ff-display);
  font-size: 17px;
  letter-spacing: .04em;
  margin: 0 0 8px;
  color: var(--c-copper-lit);
}

.page-faq .warranty-excl p {
  margin: 0;
  font-size: 14px;
  color: rgba(242, 244, 247, .68);
}

/* ---------- 物流 ---------- */
.page-faq .faq-logistics {
  background: var(--c-paper);
}

.page-faq .faq-logistics .eyebrow {
  color: var(--c-ice);
}

.page-faq .logi-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  counter-reset: logi;
}

.page-faq .logi-item {
  display: grid;
  gap: 6px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.page-faq .logi-item:first-child {
  border-top: 1px solid var(--line);
}

.page-faq .logi-tag {
  font-family: var(--ff-display);
  font-size: 22px;
  letter-spacing: .08em;
  color: var(--c-navy);
}

.page-faq .logi-days {
  font-family: var(--ff-mono);
  font-size: 13px;
  color: var(--c-numeral);
  letter-spacing: .04em;
}

.page-faq .logi-days strong {
  font-family: var(--ff-display);
  font-size: 26px;
  color: var(--c-copper-deep);
  letter-spacing: .02em;
  margin-right: 4px;
}

.page-faq .logi-item p {
  margin: 0;
  font-size: 14.5px;
  color: rgba(14, 27, 51, .74);
  max-width: 46em;
}

.page-faq .logi-tips {
  margin-top: 28px;
  display: grid;
  gap: 14px;
}

.page-faq .logi-tips p {
  margin: 0;
  font-size: 14.5px;
  color: rgba(14, 27, 51, .78);
  background: rgba(79, 168, 206, .08);
  border-left: 3px solid var(--c-ice);
  padding: 14px 18px;
}

.page-faq .logi-tips strong {
  color: var(--c-navy);
}

/* ---------- 安装 ---------- */
.page-faq .faq-install {
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-install .eyebrow {
  color: var(--c-copper-deep);
}

.page-faq .faq-install-grid {
  display: grid;
  gap: 38px;
}

.page-faq .faq-install-media .media-frame {
  background: var(--c-silver);
  border: 1px solid var(--line);
}

.page-faq .faq-install-cap {
  font-family: var(--ff-mono);
  font-size: 12px;
  color: var(--c-numeral);
  margin-top: 12px;
  line-height: 1.7;
}

.page-faq .faq-install-body h2 {
  font-family: var(--ff-serif);
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.32;
  margin: 14px 0 0;
}

.page-faq .faq-install-lead {
  margin-top: 14px;
  font-size: 15px;
  color: rgba(14, 27, 51, .74);
  max-width: 36em;
}

.page-faq .install-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .install-steps li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-faq .install-steps li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .install-num {
  font-family: var(--ff-mono);
  font-size: 13px;
  color: var(--c-copper-deep);
  letter-spacing: .08em;
  padding-top: 3px;
}

.page-faq .install-steps h3 {
  font-family: var(--ff-display);
  font-size: 18px;
  letter-spacing: .04em;
  margin: 0 0 6px;
}

.page-faq .install-steps p {
  margin: 0;
  font-size: 14.5px;
  color: rgba(14, 27, 51, .74);
}

.page-faq .install-link {
  margin-top: 22px;
  font-size: 14px;
  color: var(--c-numeral);
}

/* ---------- 自检 ---------- */
.page-faq .faq-diag {
  background: var(--c-navy);
  color: var(--c-paper);
}

.page-faq .faq-diag .eyebrow {
  color: var(--c-cyan);
}

.page-faq .faq-diag .faq-sec-head h2 {
  color: var(--c-paper);
}

.page-faq .faq-diag .faq-sec-sub {
  color: rgba(242, 244, 247, .74);
}

.page-faq .faq-diag-grid {
  display: grid;
  gap: 36px;
}

.page-faq .diag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-faq .diag-item {
  position: relative;
  padding-left: 26px;
  border-left: 1px solid rgba(199, 205, 214, .22);
}

.page-faq .diag-num {
  font-family: var(--ff-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--c-cyan);
  display: block;
  margin-bottom: 6px;
}

.page-faq .diag-item h3 {
  font-family: var(--ff-display);
  font-size: 19px;
  letter-spacing: .04em;
  margin: 0 0 10px;
  color: var(--c-paper);
}

.page-faq .diag-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: ds;
}

.page-faq .diag-steps li {
  counter-increment: ds;
  position: relative;
  padding-left: 24px;
  font-size: 14px;
  color: rgba(242, 244, 247, .74);
  margin-bottom: 7px;
}

.page-faq .diag-steps li::before {
  content: counter(ds) ".";
  position: absolute;
  left: 0;
  font-family: var(--ff-mono);
  font-size: 12px;
  color: rgba(143, 216, 234, .8);
}

.page-faq .faq-diag-media {
  margin: 0;
}

.page-faq .faq-diag-media .media-frame {
  background: rgba(199, 205, 214, .1);
  border: 1px solid var(--line-dark);
}

.page-faq .faq-diag-media figcaption {
  font-family: var(--ff-mono);
  font-size: 12px;
  line-height: 1.7;
  color: rgba(199, 205, 214, .62);
  margin-top: 12px;
}

/* ---------- 工单流程 ---------- */
.page-faq .faq-flow {
  background: var(--c-paper);
}

.page-faq .faq-flow .eyebrow {
  color: var(--c-ice);
}

.page-faq .flow-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .flow-step {
  position: relative;
  padding: 24px 0 24px 34px;
  border-left: 2px solid rgba(14, 27, 51, .12);
}

.page-faq .flow-step::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 30px;
  width: 12px;
  height: 12px;
  background: #fff;
  border: 2px solid var(--c-ice);
  border-radius: 50%;
}

.page-faq .flow-step:last-child::after {
  content: "";
  position: absolute;
  left: -2px;
  top: 42px;
  bottom: -24px;
  width: 2px;
  background: transparent;
}

.page-faq .flow-when {
  font-family: var(--ff-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--c-numeral);
  display: block;
}

.page-faq .flow-num {
  font-family: var(--ff-display);
  font-size: 30px;
  letter-spacing: .03em;
  color: var(--c-navy);
  display: block;
  margin: 4px 0 8px;
}

.page-faq .flow-step p {
  margin: 0;
  font-size: 14.5px;
  color: rgba(14, 27, 51, .74);
  max-width: 40em;
}

.page-faq .flow-facts {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .flow-facts li {
  font-size: 14px;
  color: rgba(14, 27, 51, .78);
  border-left: 2px solid var(--c-mint);
  padding-left: 14px;
}

/* ---------- 问题库 ---------- */
.page-faq .faq-topics {
  background: #fff;
  border-top: 1px solid var(--line);
}

.page-faq .faq-topics .eyebrow {
  color: var(--c-copper-deep);
}

.page-faq .topic-accordion {
  display: grid;
  gap: 10px;
}

.page-faq .topic-group {
  border: 1px solid var(--line);
  background: var(--c-paper);
}

.page-faq .topic-group[open] {
  border-color: rgba(14, 27, 51, .2);
  box-shadow: 0 8px 22px rgba(14, 27, 51, .05);
}

.page-faq .topic-group > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  font-weight: 600;
  color: var(--c-navy);
}

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

.page-faq .topic-bracket::before {
  content: "[+]";
  font-family: var(--ff-mono);
  font-size: 13px;
  color: var(--c-copper-deep);
  letter-spacing: .04em;
}

.page-faq .topic-group[open] .topic-bracket::before {
  content: "[\2212]";
  color: var(--c-ice);
}

.page-faq .topic-name {
  font-family: var(--ff-display);
  font-size: 18px;
  letter-spacing: .05em;
  flex: 1 1 auto;
}

.page-faq .topic-count {
  font-family: var(--ff-mono);
  font-size: 11.5px;
  color: var(--c-numeral);
  letter-spacing: .06em;
}

.page-faq .topic-items {
  list-style: none;
  margin: 0;
  padding: 4px 18px 18px 18px;
  display: grid;
  gap: 14px;
  border-top: 1px dashed var(--line);
}

.page-faq .topic-items li {
  padding-top: 12px;
  border-top: 1px solid rgba(14, 27, 51, .06);
}

.page-faq .topic-items li:first-child {
  border-top: 0;
  padding-top: 10px;
}

.page-faq .topic-items h3 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 4px;
  color: var(--c-navy);
  font-family: var(--ff-body);
  line-height: 1.6;
}

.page-faq .topic-items p {
  margin: 0;
  font-size: 14px;
  color: rgba(14, 27, 51, .7);
}

/* ---------- 收束 ---------- */
.page-faq .faq-cta {
  padding: 56px 0 76px;
  background: var(--c-paper);
}

.page-faq .faq-cta-inner {
  display: grid;
  gap: 22px;
  align-items: center;
  background: var(--c-navy);
  color: var(--c-paper);
  padding: 34px 26px;
  border-left: 4px solid var(--c-copper);
}

.page-faq .faq-cta-inner h2 {
  font-family: var(--ff-serif);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.36;
  margin: 0 0 10px;
}

.page-faq .faq-cta-inner p {
  margin: 0;
  font-size: 14.5px;
  color: rgba(242, 244, 247, .76);
  max-width: 40em;
}

.page-faq .faq-cta-btn {
  justify-self: start;
  border-bottom: 0;
}

/* ---------- 图片 ---------- */
.page-faq .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .people-list {
    grid-template-columns: repeat(6, 1fr);
  }

  .page-faq .person-card:nth-child(1) { grid-column: 1 / span 2; }
  .page-faq .person-card:nth-child(2) { grid-column: 3 / span 2; }
  .page-faq .person-card:nth-child(3) { grid-column: 5 / span 2; }
  .page-faq .person-card:nth-child(4) { grid-column: 1 / span 3; }
  .page-faq .person-card:nth-child(5) { grid-column: 4 / span 3; }

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

  .page-faq .logi-item {
    grid-template-columns: 120px 1fr;
    align-items: baseline;
    column-gap: 20px;
  }

  .page-faq .logi-item p {
    grid-column: 2 / -1;
  }

  .page-faq .flow-track {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }

  .page-faq .flow-step {
    border-left: 0;
    border-top: 2px solid rgba(14, 27, 51, .12);
    padding: 26px 22px 0 0;
  }

  .page-faq .flow-step::before {
    left: 0;
    top: -7px;
  }

  .page-faq .flow-step:last-child::after {
    display: none;
  }

  .page-faq .flow-facts {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
}

@media (min-width: 980px) {
  .page-faq section {
    padding: 84px 0;
  }

  .page-faq .faq-hero {
    padding: 76px 0 88px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: 56px;
    align-items: end;
  }

  .page-faq .faq-hero-side {
    border-top: 0;
    border-left: 1px solid var(--line-dark);
    padding-top: 0;
    padding-left: 30px;
  }

  .page-faq .faq-warranty-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    column-gap: 56px;
    row-gap: 34px;
  }

  .page-faq .warranty-excl {
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
  }

  .page-faq .warranty-row {
    grid-template-columns: 150px 1fr 72px;
    align-items: center;
    column-gap: 14px;
  }

  .page-faq .warranty-val {
    text-align: right;
  }

  .page-faq .faq-install-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-diag-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-diag-media {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    padding: 44px 44px;
  }

  .page-faq .topic-items {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 26px;
  }

  .page-faq .topic-items li:nth-child(2) {
    border-top: 0;
    padding-top: 10px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-sec-head--wide {
    max-width: 54em;
  }

  .page-faq .diag-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 30px;
  }

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