.page-faq {
  --faq-index-w: 250px;
  --faq-gap: 60px;
  --faq-anchor-offset: 128px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

.page-faq .crumbs {
  padding-block: 20px 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(28px, 5vw, 60px) clamp(34px, 5vw, 68px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 22px;
  font-family: var(--font-head);
  font-size: clamp(38px, 8vw, 78px);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero .lead {
  margin: 0;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 主体网格 ---------- */
.page-faq .qa-shell {
  padding-block: clamp(28px, 4vw, 52px) clamp(40px, 6vw, 90px);
}

.page-faq .qa-body {
  min-width: 0;
}

.page-faq .faq-index {
  margin-bottom: 34px;
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--copper);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0 18px;
}

.page-faq .faq-index__list > li {
  flex: 0 0 auto;
}

.page-faq .faq-index__item a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 0 8px 14px;
  border-left: 1px solid var(--line-cool);
  color: var(--slate);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--ease), border-color var(--ease), padding-left var(--ease);
}

.page-faq .faq-index__item a .mono {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.page-faq .faq-index__item a:hover,
.page-faq .faq-index__item a:focus-visible {
  color: var(--ink);
  border-left-color: var(--flame);
  padding-left: 19px;
  outline: none;
}

.page-faq .faq-index__item a:focus-visible {
  outline: 2px solid var(--flame);
  outline-offset: 2px;
}

/* ---------- 问答分组 ---------- */
.page-faq .qa-group {
  padding-bottom: 42px;
  scroll-margin-top: var(--faq-anchor-offset);
}

.page-faq .qa-group + .qa-group {
  padding-top: 38px;
  border-top: 1px solid var(--line-cool);
}

.page-faq .qa-group__title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: clamp(23px, 3.2vw, 32px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.015em;
}

.page-faq .qa-group__num {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--flame);
}

.page-faq .qa-group__note {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa-item {
  border-top: 1px solid var(--line-cool);
}

.page-faq .qa-item:last-of-type {
  border-bottom: 1px solid var(--line-cool);
}

.page-faq .qa-item__q {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 16px 34px 16px 0;
  position: relative;
  cursor: pointer;
  list-style: none;
  transition: color var(--ease);
}

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

.page-faq .qa-item__q::after {
  content: "";
  position: absolute;
  right: 6px;
  top: 24px;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--copper);
  border-bottom: 1.5px solid var(--copper);
  transform: rotate(45deg);
  transition: transform var(--ease), border-color var(--ease);
}

.page-faq .qa-item[open] .qa-item__q::after {
  transform: rotate(-135deg);
  border-color: var(--flame);
}

.page-faq .qa-item__q:hover .qa-item__qtext,
.page-faq .qa-item[open] .qa-item__qtext {
  color: var(--flame);
}

.page-faq .qa-item__q:focus-visible {
  outline: 2px solid var(--flame);
  outline-offset: 3px;
}

.page-faq .qa-item__qtext {
  font-size: clamp(16px, 1.7vw, 18px);
  font-weight: 700;
  line-height: 1.5;
  transition: color var(--ease);
}

.page-faq .qa-item__a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--indigo);
  padding: 2px 0 2px 12px;
  border-left: 2px solid var(--flame);
}

.page-faq .qa-item__body {
  padding: 0 0 22px;
  max-width: 62ch;
}

.page-faq .qa-item__body p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--char);
}

.page-faq .qa-item__body p:last-child {
  margin-bottom: 0;
}

.page-faq .qa-item__link a {
  color: var(--indigo);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--flame);
  padding-bottom: 2px;
}

.page-faq .qa-item__link a:hover,
.page-faq .qa-item__link a:focus-visible {
  color: var(--flame);
}

/* ---------- 保养条款清单 ---------- */
.page-faq .clause-section {
  margin-block: 10px 42px;
  padding: clamp(24px, 3.4vw, 40px) clamp(18px, 3vw, 34px);
  background: var(--mist);
  border: 1px solid var(--line);
  scroll-margin-top: var(--faq-anchor-offset);
}

.page-faq .clause-intro {
  display: grid;
  gap: 24px;
  margin-bottom: 30px;
}

.page-faq .clause-intro__title {
  margin: 12px 0 16px;
  font-family: var(--font-head);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.015em;
}

.page-faq .clause-intro__text .lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--char);
}

.page-faq .clause-intro__media {
  margin: 0;
}

.page-faq .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .clause-board {
  background: var(--paper);
  border: 1px solid var(--line);
}

.page-faq .clause-board__head {
  display: none;
}

.page-faq .clause-group + .clause-group {
  border-top: 1px solid var(--line);
}

.page-faq .clause-group__title {
  margin: 0;
  padding: 13px 20px;
  background: var(--indigo);
  color: var(--paper);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.page-faq .clause-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .clause-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 15px 20px;
  border-top: 1px solid var(--line-cool);
  transition: background var(--ease);
}

.page-faq .clause-list > .clause-row:first-child {
  border-top: 0;
}

.page-faq .clause-check {
  display: flex;
  align-items: center;
  gap: 11px;
  cursor: pointer;
  position: relative;
}

.page-faq .clause-check__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: 0;
}

.page-faq .clause-check__box {
  flex: none;
  position: relative;
  width: 20px;
  height: 20px;
  border: 1px solid var(--slate);
  background: transparent;
  transition: background var(--ease), border-color var(--ease);
}

.page-faq .clause-check__box::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--paper);
  border-bottom: 2px solid var(--paper);
  transform: rotate(45deg) scale(0);
  transition: transform var(--ease);
}

.page-faq .clause-check__input:checked ~ .clause-check__box {
  background: var(--flame);
  border-color: var(--flame);
}

.page-faq .clause-check__input:checked ~ .clause-check__box::after {
  transform: rotate(45deg) scale(1);
}

.page-faq .clause-check__input:focus-visible ~ .clause-check__box {
  outline: 2px solid var(--flame);
  outline-offset: 2px;
}

.page-faq .clause-check__text {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  transition: color var(--ease);
}

.page-faq .clause-row__hint {
  font-size: 14px;
  line-height: 1.65;
  color: var(--slate);
}

.page-faq .clause-row__cycle {
  display: flex;
  flex-direction: column;
  gap: 7px;
  align-items: flex-start;
}

.page-faq .clause-row__ticks {
  display: block;
  width: 100%;
  min-width: 108px;
  height: 6px;
  border-bottom: 1px solid var(--line);
  background-image: repeating-linear-gradient(to right, var(--copper) 0 1px, transparent 1px 9px);
}

.page-faq .clause-row__cycle-text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--indigo);
}

.page-faq .clause-row:has(.clause-check__input:checked) {
  background: rgba(22, 34, 90, 0.06);
}

.page-faq .clause-row:has(.clause-check__input:checked) .clause-check__text {
  color: var(--indigo);
}

/* ---------- 报修流程 ---------- */
.page-faq .flow {
  list-style: none;
  margin: 26px 0 30px;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .flow__step {
  position: relative;
  padding: 4px 0 22px 30px;
}

.page-faq .flow__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 10px;
  height: 10px;
  background: var(--flame);
}

.page-faq .flow__step::after {
  content: "";
  position: absolute;
  left: 4.5px;
  top: 24px;
  bottom: 2px;
  width: 1px;
  background: var(--line);
}

.page-faq .flow__step:last-child {
  padding-bottom: 0;
}

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

.page-faq .flow__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--copper);
  margin-bottom: 6px;
}

.page-faq .flow__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.35;
}

.page-faq .flow__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 配件与耗材 ---------- */
.page-faq .parts-split {
  display: grid;
  gap: 26px;
  align-items: start;
}

.page-faq .parts-split__text p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--char);
}

.page-faq .parts-split__text p:last-child {
  margin-bottom: 0;
}

.page-faq .parts-split__media {
  margin: 0;
  border: 1px solid var(--line);
}

/* ---------- 联系客服 ---------- */
.page-faq .qa-group--help {
  padding-bottom: 0;
}

.page-faq .help-grid {
  display: grid;
  gap: 1px;
  background: var(--line-cool);
  border: 1px solid var(--line-cool);
  margin-bottom: 20px;
}

.page-faq .help-card {
  background: var(--paper);
  padding: 18px 20px;
}

.page-faq .help-card__label {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--copper);
}

.page-faq .help-card__value {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .help-note {
  margin: 0 0 24px;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
  padding-left: 16px;
  border-left: 2px solid var(--copper);
}

.page-faq .help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .clause-board__head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr) minmax(140px, auto);
    gap: 28px;
    padding: 12px 20px;
    background: var(--char);
    color: var(--paper);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.16em;
  }

  .page-faq .clause-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr) minmax(140px, auto);
    align-items: center;
    gap: 28px;
  }

  .page-faq .clause-row__cycle {
    align-items: flex-start;
  }

  .page-faq .help-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .parts-split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 40px;
    align-items: center;
  }

  .page-faq .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 26px;
  }

  .page-faq .flow__step {
    padding: 20px 0 0;
    border-top: 1px solid var(--copper);
  }

  .page-faq .flow__step::before {
    top: -4px;
    left: 0;
    width: 7px;
    height: 7px;
  }

  .page-faq .flow__step::after {
    display: none;
  }
}

@media (min-width: 820px) {
  .page-faq .clause-intro {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 40px;
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-faq .qa-shell {
    display: grid;
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    column-gap: var(--faq-gap);
    align-items: start;
  }

  .page-faq .faq-index {
    grid-column: 1;
    position: sticky;
    top: 112px;
    margin-bottom: 0;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-faq .qa-body {
    grid-column: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__item a,
  .page-faq .clause-check__box,
  .page-faq .clause-check__box::after,
  .page-faq .qa-item__q::after,
  .page-faq .qa-item__qtext,
  .page-faq .clause-row {
    transition: none;
  }
}