.page-faq {
  --faq-line: rgba(199, 206, 218, .14);
  --faq-line-strong: rgba(199, 206, 218, .3);
  --faq-cyan-soft: rgba(34, 224, 214, .1);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-top: 20px;
  padding-bottom: 2px;
}
.page-faq .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
}
.page-faq .breadcrumbs__link {
  color: var(--grey);
  text-decoration: none;
  transition: color .18s ease;
}
.page-faq .breadcrumbs__link:hover,
.page-faq .breadcrumbs__link:focus-visible {
  color: var(--cyan);
}
.page-faq .breadcrumbs__link[aria-current="page"] {
  color: var(--silver);
}
.page-faq .breadcrumbs__sep {
  color: var(--grey);
  opacity: .55;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  margin-top: 18px;
  padding: 34px 0 30px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(148deg, rgba(6, 48, 46, .95) 0%, rgba(11, 18, 32, .72) 46%, rgba(5, 7, 14, .1) 82%);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -110px;
  right: -120px;
  width: 320px;
  height: 340px;
  background: linear-gradient(150deg, rgba(34, 224, 214, .24), rgba(34, 224, 214, 0) 68%);
  transform: rotate(16deg) skewX(-6deg);
  pointer-events: none;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 96px;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), rgba(255, 122, 47, 0));
  pointer-events: none;
}
.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}
.page-faq .faq-hero__title {
  margin: 12px 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 28px;
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--paper);
}
.page-faq .faq-hero__lede {
  margin-top: 16px;
  max-width: 60ch;
  color: var(--silver);
  font-size: 15px;
  line-height: 1.75;
}
.page-faq .faq-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 三步上手 ---------- */
.page-faq .faq-start {
  padding-top: 40px;
  padding-bottom: 8px;
}
.page-faq .faq-start__head .lede {
  max-width: 62ch;
}
.page-faq .faq-start__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 26px;
}
.page-faq .start-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.page-faq .start-step {
  position: relative;
  padding: 16px 16px 16px 20px;
  border: 1px solid var(--faq-line);
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(11, 18, 32, .92), rgba(11, 18, 32, .48));
  transition: border-color .2s ease, transform .2s ease;
}
.page-faq .start-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(34, 224, 214, 0));
}
.page-faq .start-step:hover {
  border-color: rgba(34, 224, 214, .42);
  transform: translateY(-2px);
}
.page-faq .start-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--orange);
}
.page-faq .start-step__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.3;
  color: var(--paper);
}
.page-faq .start-step__text {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--silver);
}
.page-faq .start-figure {
  margin: 0;
}
.page-faq .start-figure img,
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--faq-line);
  border-radius: 2px;
  background: var(--panel);
  object-fit: cover;
}

/* ---------- 问答区 ---------- */
.page-faq .faq-body {
  padding-top: 40px;
  padding-bottom: 56px;
}
.page-faq .faq-body__head {
  margin-bottom: 22px;
}
.page-faq .filter-bar.faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .filter-btn {
  font: inherit;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--silver);
  background: transparent;
  border: 1px solid var(--faq-line-strong);
  border-radius: 2px;
  padding: 7px 12px;
  cursor: pointer;
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}
.page-faq .filter-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}
.page-faq .filter-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}
.page-faq .filter-btn[aria-pressed="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 700;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

/* 索引侧栏 */
.page-faq .faq-index__inner {
  padding: 16px;
  border: 1px solid var(--faq-line);
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(11, 18, 32, .95), rgba(6, 48, 46, .32));
}
.page-faq .faq-index__head {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-faq .faq-index__list {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 3px;
}
.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  color: var(--silver);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--faq-cyan-soft);
}
.page-faq .faq-index__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--grey);
}
.page-faq .faq-index__hint {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--grey);
}

/* 问答分组 */
.page-faq .faq-group {
  scroll-margin-top: 24px;
  margin-bottom: 34px;
}
.page-faq .faq-group[hidden] {
  display: none;
}
.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--faq-line-strong);
}
.page-faq .faq-group__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--orange);
}
.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.25;
  color: var(--paper);
}
.page-faq .faq-list {
  display: grid;
  gap: 2px;
}
.page-faq .faq-figure {
  margin: 0 0 18px;
}
.page-faq .faq-figure .media__cap {
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--grey);
}

/* 折叠问答 */
.page-faq .qa {
  border: 1px solid var(--faq-line);
  border-radius: 2px;
  background: rgba(11, 18, 32, .74);
  transition: border-color .2s ease, background .2s ease;
}
.page-faq .qa:hover {
  border-color: rgba(34, 224, 214, .4);
}
.page-faq .qa[open] {
  border-color: rgba(34, 224, 214, .52);
  background: linear-gradient(180deg, rgba(6, 48, 46, .34), rgba(11, 18, 32, .74));
}
.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 13px 14px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
  transition: color .18s ease;
}
.page-faq .qa__q::-webkit-details-marker {
  display: none;
}
.page-faq .qa__q::marker {
  content: "";
}
.page-faq .qa__q:hover {
  color: var(--cyan);
}
.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}
.page-faq .qa__marker {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 4px;
  border: 1px solid var(--faq-line-strong);
  border-radius: 1px;
  transition: border-color .2s ease;
}
.page-faq .qa[open] .qa__marker {
  border-color: var(--cyan);
}
.page-faq .qa__marker::before,
.page-faq .qa__marker::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}
.page-faq .qa__marker::before {
  width: 8px;
  height: 1.5px;
}
.page-faq .qa__marker::after {
  width: 1.5px;
  height: 8px;
  transition: opacity .2s ease, transform .2s ease;
}
.page-faq .qa[open] .qa__marker::after {
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(.2);
}
.page-faq .qa__a {
  padding: 0 14px 15px 40px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--silver);
}
.page-faq .qa__a p {
  margin: 0;
}
.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 214, .4);
}
.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* 联系方式条 */
.page-faq .faq-contact {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--faq-line);
  border-left: 2px solid var(--orange);
  border-radius: 2px;
  background: linear-gradient(120deg, rgba(58, 18, 32, .55), rgba(11, 18, 32, .7));
}
.page-faq .faq-contact .copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.page-faq .faq-contact .copy__label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--grey);
}
.page-faq .faq-contact .copy__value {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--paper);
  word-break: break-all;
}
.page-faq .faq-contact .copy__state {
  font: inherit;
  font-size: 12px;
  padding: 5px 10px;
  color: var(--cyan);
  background: transparent;
  border: 1px solid rgba(34, 224, 214, .5);
  border-radius: 2px;
  cursor: pointer;
  transition: color .18s ease, background .18s ease, border-color .18s ease;
}
.page-faq .faq-contact .copy__state:hover {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}
.page-faq .faq-contact .copy[data-copied="true"] .copy__state {
  color: var(--ink);
  background: var(--orange);
  border-color: var(--orange);
}
.page-faq .faq-contact__note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--silver);
}
.page-faq .faq-contact__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 214, .4);
}
.page-faq .faq-contact__note a:hover,
.page-faq .faq-contact__note a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero {
    padding: 44px 0 40px;
  }
  .page-faq .faq-hero__title {
    font-size: 34px;
  }
  .page-faq .faq-hero__lede {
    font-size: 16px;
  }
  .page-faq .start-steps {
    gap: 14px;
  }
  .page-faq .start-step {
    padding: 18px 20px 18px 24px;
  }
  .page-faq .qa__q {
    padding: 15px 18px;
    font-size: 15.5px;
  }
  .page-faq .qa__a {
    padding: 0 18px 17px 44px;
    font-size: 15px;
  }
  .page-faq .faq-contact {
    padding: 18px 20px;
  }
}

/* ---------- 桌面：问题索引固定，答案面板在右 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-hero__title {
    font-size: 40px;
    line-height: 1.05;
  }
  .page-faq .faq-start__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: 32px;
    align-items: start;
  }
  .page-faq .faq-layout {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: 44px;
  }
  .page-faq .faq-index__inner {
    position: sticky;
    top: 24px;
  }
  .page-faq .faq-group {
    margin-bottom: 40px;
  }
  .page-faq .faq-group__title {
    font-size: 22px;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-hero {
    padding: 56px 0 48px;
  }
  .page-faq .faq-hero__title {
    max-width: 18ch;
  }
  .page-faq .faq-layout {
    grid-template-columns: 264px minmax(0, 1fr);
    gap: 56px;
  }
}