.page-faq {
  --faq-stroke: 2px solid var(--ink);
  --faq-shadow: 6px 6px 0 var(--ink);
  --faq-shadow-soft: 3px 3px 0 var(--ink);
  --faq-gap: clamp(20px, 4vw, 44px);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--faq-stroke);
  background: var(--paper);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -18%;
  bottom: -52%;
  width: 68%;
  height: 108%;
  background: var(--hl);
  transform: rotate(-13deg);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  padding-block: clamp(30px, 5vw, 66px);
}

.page-faq .faq-hero__copy h1 {
  margin: 10px 0 0;
  font-size: clamp(32px, 6.4vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-hero__jump {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
}

.page-faq .faq-hero__jump a {
  display: inline-block;
  padding: 6px 13px;
  border: var(--faq-stroke);
  background: var(--paper);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-hero__jump a:hover {
  background: var(--hl);
  transform: translate(-2px, -2px);
  box-shadow: var(--faq-shadow-soft);
}

.page-faq .faq-hero__panel {
  position: relative;
  background: var(--winter);
  color: #fff;
  padding: clamp(20px, 3vw, 32px);
  border: var(--faq-stroke);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-hero__panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(158deg, rgba(255, 255, 255, .1) 0 34%, transparent 34%);
  pointer-events: none;
}

.page-faq .eyebrow--light {
  color: rgba(255, 255, 255, .74);
  position: relative;
}

.page-faq .stepbar {
  position: relative;
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .stepbar__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  padding: 14px;
  border: 2px solid rgba(255, 255, 255, .34);
  background: rgba(255, 255, 255, .07);
}

.page-faq .stepbar__num {
  grid-row: span 2;
  align-self: start;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, .72);
}

.page-faq .stepbar__item--spring .stepbar__num { background: var(--spring); }
.page-faq .stepbar__item--summer .stepbar__num { background: var(--summer); }
.page-faq .stepbar__item--autumn .stepbar__num { background: var(--autumn); }

.page-faq .stepbar__title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .stepbar__note {
  grid-column: 2;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .8);
}

/* ============ 报修流程 ============ */
.page-faq .faq-flow {
  padding-block: var(--rhythm);
}

.page-faq .faq-flow__body {
  margin-top: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-flow__steps {
  display: grid;
  border-top: var(--faq-stroke);
}

.page-faq .flow-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-bottom: var(--faq-stroke);
}

.page-faq .flow-step__num {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  border: var(--faq-stroke);
}

.page-faq .flow-step:nth-child(1) .flow-step__num { background: var(--spring); }
.page-faq .flow-step:nth-child(2) .flow-step__num { background: var(--summer); }
.page-faq .flow-step:nth-child(3) .flow-step__num { background: var(--autumn); }

.page-faq .flow-step__title {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 22px);
  letter-spacing: -0.01em;
}

.page-faq .flow-step__text {
  margin: 8px 0 0;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .flow-step__more {
  margin-top: 12px;
  border: var(--line-thin);
  background: var(--panel);
  padding: 10px 14px;
}

.page-faq .flow-step__more summary {
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  color: var(--winter);
}

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

.page-faq .flow-step__more summary::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 9px;
  border-right: 2px solid var(--winter);
  border-bottom: 2px solid var(--winter);
  transform: rotate(-45deg) translate(-1px, -1px);
  transition: transform var(--dur) var(--ease);
}

.page-faq .flow-step__more[open] summary::before {
  transform: rotate(45deg) translate(-2px, 1px);
}

.page-faq .flow-step__list {
  margin: 10px 0 0;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .media-frame {
  border: var(--faq-stroke);
  background: var(--panel);
  margin: 0;
}

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

.page-faq .media-frame__caption {
  padding: 10px 14px;
  border-top: var(--line-thin);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  background: var(--paper);
}

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

/* ============ 覆盖范围 ============ */
.page-faq .faq-coverage {
  padding-block: var(--rhythm);
  border-block: var(--faq-stroke);
}

.page-faq .faq-coverage__lead p {
  max-width: 40em;
  line-height: 1.8;
}

.page-faq .coverage-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-faq .coverage-stats .stat {
  display: grid;
  gap: 4px;
  padding: 16px;
  border: var(--faq-stroke);
  background: var(--paper);
  box-shadow: var(--faq-shadow-soft);
}

.page-faq .coverage-stats .stat__value {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--winter);
}

.page-faq .coverage-stats .stat__label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .response-list {
  margin-top: clamp(22px, 3vw, 34px);
  border-top: var(--faq-stroke);
}

.page-faq .response-row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: var(--line-thin);
}

.page-faq .response-row__zone {
  font-weight: 700;
}

.page-faq .response-row__time {
  font-size: 18px;
  font-weight: 700;
  color: var(--winter);
}

.page-faq .response-row__note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ============ 编号核验 ============ */
.page-faq .faq-verify {
  padding-block: var(--rhythm);
}

.page-faq .faq-verify__body {
  margin-top: var(--faq-gap);
  align-items: start;
}

.page-faq .verify-check__label {
  display: block;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 10px;
}

.page-faq .verify-check__input {
  width: 100%;
  padding: 15px 16px;
  font-size: 20px;
  letter-spacing: .06em;
  color: var(--ink);
  background: #fff;
  border: var(--faq-stroke);
  border-radius: 0;
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .verify-check__input:focus {
  outline: 3px solid var(--winter);
  outline-offset: 2px;
}

.page-faq .verify-check__input:not(:placeholder-shown) {
  background: var(--hl);
  box-shadow: var(--faq-shadow-soft);
}

.page-faq .verify-check__hint {
  margin: 12px 0 0;
  line-height: 1.8;
}

.page-faq .prefix-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .prefix-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 6px 12px;
  padding: 12px 14px;
  border: var(--faq-stroke);
  background: var(--paper);
}

.page-faq .prefix-item .note {
  grid-column: 2;
}

.page-faq .prefix-item--spring { border-left: 6px solid var(--spring); }
.page-faq .prefix-item--summer { border-left: 6px solid var(--summer); }
.page-faq .prefix-item--autumn { border-left: 6px solid var(--autumn); }

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

/* ============ 退换与保修 ============ */
.page-faq .faq-warranty {
  padding-block: var(--rhythm);
}

.page-faq .warranty-grid {
  margin-top: var(--faq-gap);
  align-items: stretch;
}

.page-faq .warranty-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px;
  background: var(--paper);
  border: var(--faq-stroke);
}

.page-faq .warranty-card--spring { box-shadow: 6px 6px 0 var(--spring); }
.page-faq .warranty-card--summer { box-shadow: 6px 6px 0 var(--summer); }
.page-faq .warranty-card--autumn { box-shadow: 6px 6px 0 var(--autumn); }

.page-faq .warranty-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-faq .warranty-card__title {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.01em;
}

.page-faq .warranty-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 0;
  padding: 12px 0;
  border-block: var(--line-thin);
}

.page-faq .warranty-card__meta-item dt {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .warranty-card__meta-item dd {
  margin: 3px 0 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .warranty-card__label {
  margin: 0;
  font-size: 13px;
  letter-spacing: .08em;
  font-weight: 700;
  color: var(--muted);
}

.page-faq .warranty-card__list {
  margin: 0;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

/* ============ 常见问题 ============ */
.page-faq .faq-answers {
  padding-block: var(--rhythm);
  border-block: var(--faq-stroke);
}

.page-faq .faq-board {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  margin-top: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-board__side .filter-bar {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.page-faq .faq-board__side .filter-btn {
  width: 100%;
  justify-content: flex-start;
  text-align: left;
}

.page-faq .filter-count {
  margin: 14px 0 0;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .filter-empty {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--alert);
}

.page-faq .faq-board__list {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .qa {
  background: var(--paper);
  border: var(--faq-stroke);
}

.page-faq .qa[data-tags~="spring"] { border-left: 6px solid var(--spring); }
.page-faq .qa[data-tags~="summer"] { border-left: 6px solid var(--summer); }
.page-faq .qa[data-tags~="autumn"] { border-left: 6px solid var(--autumn); }
.page-faq .qa[data-tags~="winter"] { border-left: 6px solid var(--winter); }

.page-faq .qa[open] {
  background: var(--panel);
}

.page-faq .qa__q {
  cursor: pointer;
  list-style: none;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 16px 18px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.6;
}

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

.page-faq .qa__q::before {
  content: "";
  width: 11px;
  height: 11px;
  margin-top: 7px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: rotate(-45deg);
  transition: transform var(--dur) var(--ease);
}

.page-faq .qa[open] .qa__q::before {
  transform: rotate(45deg);
}

.page-faq .qa__a {
  padding: 0 18px 18px 41px;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

/* ============ 上门前准备 ============ */
.page-faq .faq-prep {
  padding-block: var(--rhythm);
}

.page-faq .faq-prep__body {
  align-items: start;
}

.page-faq .faq-prep__lead p {
  max-width: 34em;
  line-height: 1.8;
}

.page-faq .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  border-top: var(--faq-stroke);
}

.page-faq .checklist__label {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 0;
  border-bottom: var(--line-thin);
  cursor: pointer;
}

.page-faq .checklist__box {
  appearance: none;
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  margin: 3px 0 0;
  display: grid;
  place-items: center;
  border: var(--faq-stroke);
  background: var(--paper);
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}

.page-faq .checklist__box:checked {
  background: var(--spring);
}

.page-faq .checklist__box:checked::after {
  content: "";
  width: 11px;
  height: 6px;
  border-left: 3px solid #fff;
  border-bottom: 3px solid #fff;
  transform: rotate(-45deg) translate(1px, -1px);
}

.page-faq .checklist__box:focus-visible {
  outline: 3px solid var(--winter);
  outline-offset: 2px;
}

.page-faq .checklist__text {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .checklist__text strong {
  display: block;
  font-size: 16px;
  margin-bottom: 2px;
}

.page-faq .checklist__label:has(.checklist__box:checked) .checklist__text {
  color: var(--muted);
}

/* ============ 联络收尾 ============ */
.page-faq .faq-help {
  padding-block: var(--rhythm);
  background: var(--winter);
  color: #fff;
  border-top: var(--faq-stroke);
}

.page-faq .faq-help__inner {
  display: grid;
  gap: 28px;
}

.page-faq .faq-help .section__title {
  color: #fff;
}

.page-faq .faq-help__copy p {
  max-width: 36em;
  line-height: 1.85;
  color: rgba(255, 255, 255, .86);
}

.page-faq .faq-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-faq .faq-help__contacts {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .faq-help__copy {
  display: grid;
  gap: 4px;
  width: 100%;
  text-align: left;
  padding: 13px 16px;
  color: #fff;
  background: rgba(255, 255, 255, .08);
  border: 2px solid rgba(255, 255, 255, .42);
  cursor: pointer;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-help__copy:hover {
  background: rgba(255, 255, 255, .16);
  transform: translate(-2px, -2px);
}

.page-faq .faq-help__copy .copy-btn__label {
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(255, 255, 255, .7);
}

.page-faq .faq-help__copy .copy-btn__value {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  word-break: break-all;
}

.page-faq .faq-help__copy .copy-btn__flag {
  font-size: 12px;
  color: var(--hl);
  min-height: 1em;
}

.page-faq .faq-help__note {
  color: rgba(255, 255, 255, .7);
  line-height: 1.8;
}

/* ============ 响应式 ============ */
@media (min-width: 700px) {
  .page-faq .response-row {
    grid-template-columns: 130px 190px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }

  .page-faq .coverage-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: 7fr 5fr;
  }

  .page-faq .faq-board {
    grid-template-columns: minmax(200px, 250px) minmax(0, 1fr);
  }

  .page-faq .faq-board__side {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-help__inner {
    grid-template-columns: 1.15fr .85fr;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .page-faq .verify-check__input {
    font-size: 17px;
    letter-spacing: .04em;
  }

  .page-faq .qa__a {
    padding-left: 18px;
  }

  .page-faq .flow-step {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .page-faq .flow-step__num {
    width: 44px;
    height: 44px;
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__jump a,
  .page-faq .qa__q::before,
  .page-faq .flow-step__more summary::before,
  .page-faq .checklist__box,
  .page-faq .faq-help__copy {
    transition: none;
  }

  .page-faq .faq-hero__jump a:hover,
  .page-faq .faq-help__copy:hover {
    transform: none;
  }
}