.page-faq {
  --faq-gap: clamp(52px, 9vw, 92px);
  --faq-lead: 34em;
  padding-bottom: 8px;
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  z-index: 0;
  padding-top: 26px;
  padding-bottom: 10px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -18px;
  right: -8%;
  width: clamp(180px, 46vw, 320px);
  height: clamp(180px, 46vw, 320px);
  border-radius: 46% 54% 62% 38% / 52% 42% 58% 48%;
  background: var(--mist);
  pointer-events: none;
}

.page-faq .faq-hero h1 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(30px, 7.6vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 14px 0 0;
  max-width: 13em;
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: var(--faq-lead);
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-hero__hint {
  margin: 12px 0 0;
  max-width: var(--faq-lead);
  font-size: 15px;
  line-height: 1.75;
  color: var(--celadon);
  border-left: 2px solid var(--celadon);
  padding-left: 12px;
}

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

/* ---------- 通用小标题 ---------- */
.page-faq .faq-h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(21px, 5vw, 34px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-faq .faq-sub {
  margin: 12px 0 0;
  max-width: var(--faq-lead);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 三步进度带 ---------- */
.page-faq .faq-steps {
  margin-top: var(--faq-gap);
}

.page-faq .track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 30px 0 0;
  padding: 34px 0 0;
  list-style: none;
}

.page-faq .track::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 5px;
  right: 5px;
  height: 2px;
  background: linear-gradient(90deg, var(--cinnabar), var(--amber) 55%, var(--orange));
  opacity: 0.5;
}

.page-faq .track__node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .track__node::before {
  content: "";
  position: absolute;
  top: -32px;
  left: 0;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  border-radius: 50%;
  border: 2px solid var(--cinnabar);
  background: var(--paper);
}

.page-faq .track__node:last-child::before {
  border-color: var(--orange);
}

.page-faq .track__num {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cinnabar);
}

.page-faq .track__label {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.4;
  color: var(--ink);
}

/* ---------- 步骤展开 ---------- */
.page-faq .step-list {
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.page-faq .step {
  border-bottom: 1px solid var(--line);
}

.page-faq .step__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
  transition: background-color 200ms var(--ease);
}

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

.page-faq .step__head::marker {
  content: "";
}

.page-faq .step__head:hover {
  background: var(--mist);
}

.page-faq .step__head:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 2px;
}

.page-faq .step__idx {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-faq .step__name {
  flex: 1 1 auto;
}

.page-faq .step__head::after {
  content: "+";
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 400;
  color: var(--cinnabar);
}

.page-faq .step[open] .step__head::after {
  content: "–";
}

.page-faq .step__body {
  padding: 0 4px 20px 30px;
  animation: faq-drop 240ms var(--ease) both;
}

.page-faq .step__body p {
  margin: 0;
  max-width: var(--faq-lead);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

@keyframes faq-drop {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-steps__note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-steps__note a {
  color: var(--cinnabar);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-steps__note a:hover {
  color: var(--cinnabar-deep);
}

/* ---------- 换机示意图 ---------- */
.page-faq .faq-shot {
  margin: 34px 0 0;
}

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

.page-faq .faq-shot img {
  border-radius: var(--r-lg);
  transform: rotate(-0.5deg);
  box-shadow: var(--shadow);
}

/* ---------- 三种情况对照 ---------- */
.page-faq .faq-cases {
  margin-top: var(--faq-gap);
}

.page-faq .cases {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-faq .case {
  display: grid;
  gap: 14px;
  padding: 20px 18px 20px 22px;
  background: var(--fold);
  border-left: 4px solid var(--orange);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.page-faq .case__label {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cinnabar);
}

.page-faq .case__name {
  margin: 8px 0 8px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.35;
}

.page-faq .case__desc,
.page-faq .case__fix p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .case__fix {
  padding-top: 13px;
  border-top: 1px dashed var(--line);
}

.page-faq .case__fixlabel {
  display: block;
  margin-bottom: 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--celadon);
}

/* ---------- 小屏阅读设置 ---------- */
.page-faq .faq-read {
  display: grid;
  gap: 26px;
  margin-top: var(--faq-gap);
}

.page-faq .faq-read__text > p {
  margin: 12px 0 0;
  max-width: var(--faq-lead);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .size-demo {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.page-faq .size-demo__row {
  margin: 0;
  padding: 14px 16px;
  background: var(--paper);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
  color: var(--ink);
}

.page-faq .size-demo__row--std {
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .size-demo__row--lg {
  font-size: 17px;
  line-height: 1.75;
  border-color: var(--amber);
}

.page-faq .faq-read__list {
  margin: 20px 0 0;
  padding: 0 0 0 18px;
  max-width: var(--faq-lead);
  display: grid;
  gap: 10px;
}

.page-faq .faq-read__list li {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-read__list li::marker {
  color: var(--amber);
}

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

.page-faq .faq-read__pic img {
  border-radius: var(--r-lg);
  max-height: 480px;
  object-fit: cover;
}

/* ---------- 临时查信息 ---------- */
.page-faq .faq-look {
  margin-top: var(--faq-gap);
  padding: clamp(22px, 5vw, 38px);
  background: var(--fold);
  border-radius: var(--r-lg);
}

.page-faq .faq-look__grid {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .look__item {
  padding: 16px 18px;
  background: var(--paper);
  border-radius: var(--r-md);
  border-top: 3px solid var(--amber);
}

.page-faq .look__num {
  display: block;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cinnabar);
}

.page-faq .look__item p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-look__note {
  margin: 20px 0 0;
  max-width: var(--faq-lead);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-look__note a {
  color: var(--cinnabar);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-look .btn {
  margin-top: 22px;
}

/* ---------- 找客服 ---------- */
.page-faq .faq-help {
  margin-top: var(--faq-gap);
}

.page-faq .faq-help__list {
  margin: 22px 0 0;
  padding: 0 0 0 18px;
  max-width: var(--faq-lead);
  display: grid;
  gap: 10px;
}

.page-faq .faq-help__list li {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-help__list li::marker {
  color: var(--cinnabar);
}

.page-faq .faq-help__box {
  margin-top: 24px;
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  border-left: 4px solid var(--cinnabar);
  background: var(--paper);
}

.page-faq .faq-help__line {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-help__line b {
  font-family: var(--mono);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--ink);
  word-break: break-all;
}

.page-faq .faq-help__note {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-help .btn {
  margin-top: 22px;
}

/* ---------- 底部更新记录 ---------- */
.page-faq .faq-record {
  margin: 56px 0 0;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
  color: var(--ink-soft);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 880px) {
  .page-faq .faq-hero {
    padding-top: 42px;
  }

  .page-faq .faq-hero h1 {
    max-width: 11em;
  }

  .page-faq .track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: 760px;
  }

  .page-faq .track__label {
    font-size: 17px;
  }

  .page-faq .step__head {
    font-size: 21px;
    padding: 22px 4px;
  }

  .page-faq .step__body {
    padding-left: 44px;
  }

  .page-faq .step__body p {
    font-size: 17px;
  }

  .page-faq .faq-shot {
    margin-top: 46px;
  }

  .page-faq .case {
    grid-template-columns: 1fr 1fr;
    gap: 34px;
    align-items: start;
    padding: 26px 30px 26px 32px;
  }

  .page-faq .case__fix {
    padding-top: 0;
    padding-left: 30px;
    border-top: 0;
    border-left: 1px dashed var(--line);
  }

  .page-faq .case__desc,
  .page-faq .case__fix p {
    font-size: 16px;
  }

  .page-faq .faq-read {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-look__grid {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
  }

  .page-faq .faq-help__list li,
  .page-faq .faq-help__line {
    font-size: 16px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-read {
    grid-template-columns: minmax(0, 1fr) 340px;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .step__body {
    animation: none;
  }

  .page-faq .step__head {
    transition: none;
  }

  .page-faq .faq-shot img {
    transform: none;
  }
}