.page-faq {
  --faq-side: 172px;
  background: var(--im-ink);
  color: var(--im-text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 38px;
  border-bottom: 1px solid var(--im-line-2);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -26%;
  width: min(700px, 96vw);
  height: 156%;
  background:
    linear-gradient(150deg, var(--im-cyan-soft), var(--im-purple-soft) 44%, transparent 72%),
    var(--im-indigo);
  clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 64%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--im-cyan), rgba(34, 224, 255, 0) 58%);
  opacity: .55;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  max-width: 18em;
  font-size: clamp(28px, 7.4vw, 60px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--im-text);
}

.page-faq .faq-hero__slant {
  display: inline-block;
  transform: skewX(-6deg);
  color: var(--im-cyan);
  text-shadow: 0 0 30px rgba(34, 224, 255, .38);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 46em;
  font-size: var(--im-fs-17);
  line-height: 1.75;
  color: var(--im-text);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: var(--im-fs-13);
  color: var(--im-muted);
}

.page-faq .faq-hero__meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .faq-hero__num {
  font-family: var(--im-font-mono);
  font-size: var(--im-fs-15);
  color: var(--im-orange);
  letter-spacing: .01em;
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filterbar {
  padding: 22px 0 4px;
}

.page-faq .im-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .im-filter__btn {
  font: inherit;
  font-size: var(--im-fs-13);
  line-height: 1.2;
  padding: 8px 14px;
  border: 1px solid var(--im-line);
  border-radius: var(--im-radius);
  background: transparent;
  color: var(--im-muted);
  cursor: pointer;
  transition:
    color .24s var(--im-ease),
    border-color .24s var(--im-ease),
    background-color .24s var(--im-ease),
    transform .24s var(--im-ease);
}

.page-faq .im-filter__btn:hover {
  color: var(--im-text);
  border-color: var(--im-cyan);
  transform: translateY(-1px);
}

.page-faq .im-filter__btn:focus-visible {
  outline: 2px solid var(--im-cyan);
  outline-offset: 2px;
}

.page-faq .im-filter__btn.is-active {
  color: var(--im-text);
  background: var(--im-purple-soft);
  border-color: var(--im-purple);
  box-shadow: 0 6px 22px rgba(139, 92, 255, .2);
}

/* ---------- 问题列表 ---------- */
.page-faq .faq-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--im-line-2);
}

.page-faq .faq-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: 26px 0 26px 14px;
  border-top: 1px solid var(--im-line-2);
  border-left: 2px solid transparent;
  transition: border-color .3s var(--im-ease), background-color .3s var(--im-ease);
}

.page-faq .faq-item:first-child {
  border-top: 0;
}

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

.page-faq .faq-item__num {
  font-size: var(--im-fs-40);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--im-cyan);
  text-shadow: 0 0 20px rgba(34, 224, 255, .32);
}

.page-faq .faq-item__cat {
  display: inline-block;
  padding: 4px 9px;
  font-size: var(--im-fs-12);
  letter-spacing: .08em;
  color: #12100C;
  background: var(--im-paper);
  border-radius: var(--im-radius);
  box-shadow: 0 2px 0 rgba(0, 0, 0, .4);
}

.page-faq .faq-item__body {
  min-width: 0;
}

.page-faq .faq-item__title {
  margin: 0 0 16px;
  font-size: var(--im-fs-21);
  line-height: 1.35;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--im-text);
}

/* ---------- 步骤 ---------- */
.page-faq .faq-steps {
  position: relative;
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 16px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(180deg, var(--im-cyan), var(--im-purple) 68%, rgba(139, 92, 255, 0));
  opacity: .5;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-faq .faq-step__no {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--im-cyan);
  border-radius: 50%;
  background: var(--im-indigo);
  color: var(--im-cyan);
  font-size: var(--im-fs-12);
  box-shadow: inset 0 0 12px rgba(34, 224, 255, .24);
}

.page-faq .faq-step p {
  margin: 1px 0 0;
  font-size: var(--im-fs-15);
  line-height: 1.75;
  color: var(--im-text);
}

.page-faq .faq-tip {
  margin: 16px 0 0;
  padding: 10px 0 10px 14px;
  border-left: 2px solid var(--im-purple);
  font-size: var(--im-fs-13);
  line-height: 1.7;
  color: var(--im-muted);
}

/* ---------- 示意图 ---------- */
.page-faq .faq-map {
  margin: 20px 0 0;
}

.page-faq .faq-map img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--im-line);
  border-radius: var(--im-radius);
  object-fit: cover;
  background: var(--im-indigo);
}

.page-faq .faq-map__legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin: 12px 0 0;
  font-size: var(--im-fs-13);
  line-height: 1.6;
  color: var(--im-muted);
}

.page-faq .faq-map__legend .im-index-tag {
  margin-right: 2px;
}

/* ---------- 窄注释带 ---------- */
.page-faq .faq-note {
  margin: 26px 0 0;
}

.page-faq .faq-note p {
  margin: 0;
  font-size: var(--im-fs-13);
  line-height: 1.7;
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact {
  margin-top: 40px;
  padding: 40px 0 64px;
  border-top: 1px solid var(--im-line-2);
}

.page-faq .faq-contact__title {
  margin: 12px 0 20px;
  font-size: var(--im-fs-28);
  line-height: 1.3;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--im-text);
}

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

.page-faq .faq-contact__card {
  margin-top: 26px;
  padding: 22px;
  border: 1px solid var(--im-line);
  background: var(--im-indigo);
}

.page-faq .faq-contact__card .im-card__label {
  margin: 0 0 6px;
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--im-line);
}

.page-faq .faq-contact__row:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-contact__k {
  font-family: var(--im-font-mono);
  font-size: var(--im-fs-12);
  letter-spacing: .1em;
  color: var(--im-muted);
}

.page-faq .faq-contact__v {
  font-family: var(--im-font-mono);
  font-size: var(--im-fs-15);
  line-height: 1.6;
  color: var(--im-cyan);
  word-break: break-word;
}

.page-faq .faq-contact__v--addr {
  font-family: var(--im-font-sans);
  font-size: var(--im-fs-13);
  color: var(--im-text);
}

.page-faq .faq-contact__card .faq-tip {
  margin-top: 14px;
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 860px) {
  .page-faq .faq-hero {
    padding: 34px 0 52px;
  }

  .page-faq .faq-item {
    grid-template-columns: var(--faq-side) minmax(0, 1fr);
    gap: 44px;
    padding: 34px 0 34px 26px;
  }

  .page-faq .faq-item:hover {
    border-left-color: var(--im-cyan);
    background: linear-gradient(90deg, var(--im-cyan-soft), rgba(34, 224, 255, 0) 44%);
  }

  .page-faq .faq-item__side {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .page-faq .faq-step p {
    font-size: var(--im-fs-17);
  }

  .page-faq .faq-contact__card {
    margin-top: 0;
  }
}

@media (min-width: 1120px) {
  .page-faq {
    --faq-side: 200px;
  }

  .page-faq .faq-item__title {
    font-size: var(--im-fs-28);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .im-filter__btn {
    transition: none;
  }

  .page-faq .faq-hero__slant {
    transform: none;
  }
}