.page-faq {
  --faq-rule: rgba(11, 31, 36, .14);
  --faq-ink-soft: rgba(11, 31, 36, .72);
  --faq-ink-faint: rgba(11, 31, 36, .56);
  background: var(--k-cream);
  color: var(--k-deep);
  font-family: var(--k-sans);
  overflow-x: hidden;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

/* 首屏 */
.page-faq__hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(84px, 11vw, 128px) 0 clamp(44px, 6vw, 66px);
  background:
    radial-gradient(120% 90% at 78% 4%, rgba(210, 59, 46, .42), transparent 58%),
    radial-gradient(95% 85% at 4% 98%, rgba(30, 90, 85, .74), transparent 64%),
    var(--k-deep);
  color: var(--k-cream);
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  right: 7%;
  top: 50%;
  width: min(40vw, 340px);
  aspect-ratio: 1 / 1.55;
  translate: 0 -50%;
  border: 1px solid rgba(245, 154, 35, .34);
  border-radius: 999px 999px 22px 22px;
  background: linear-gradient(180deg, rgba(245, 154, 35, .16), rgba(245, 154, 35, 0) 70%);
  z-index: -1;
  pointer-events: none;
}

.page-faq__hero-inner {
  position: relative;
}

.page-faq__crumb {
  font-size: 12px;
  letter-spacing: .1em;
}

.page-faq__crumb a {
  color: rgba(247, 243, 234, .68);
  text-decoration: none;
}

.page-faq__crumb a:hover {
  color: var(--k-gold);
}

.page-faq__crumb .k-breadcrumb__sep {
  color: rgba(247, 243, 234, .4);
}

.page-faq__crumb [aria-current="page"] {
  color: var(--k-gold);
}

.page-faq__eyebrow {
  margin: 22px 0 0;
  color: var(--k-gold);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
}

.page-faq__title {
  margin: 16px 0 0;
  max-width: 22ch;
  font-size: clamp(2rem, 6.4vw, 4.1rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
}

.page-faq__title em {
  font-style: normal;
  font-weight: 200;
  color: var(--k-amber);
}

.page-faq__lede {
  margin: 22px 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
  font-weight: 300;
  color: rgba(247, 243, 234, .8);
}

.page-faq__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.page-faq__hero .k-btn--ghost {
  color: var(--k-cream);
  border-color: rgba(247, 243, 234, .4);
}

.page-faq__hero .k-btn--ghost:hover {
  color: var(--k-gold);
  border-color: var(--k-gold);
}

/* 主体两栏 */
.page-faq__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
  padding-top: clamp(32px, 5vw, 60px);
  padding-bottom: clamp(52px, 8vw, 92px);
}

.page-faq__content {
  min-width: 0;
}

/* 左侧分类索引 */
.page-faq__rail {
  border-bottom: 1px solid var(--faq-rule);
  padding-bottom: 16px;
}

.page-faq__rail-title {
  margin: 0;
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--k-red);
  font-weight: 700;
}

.page-faq__rail-list {
  display: flex;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq__rail-list::-webkit-scrollbar {
  display: none;
}

.page-faq__rail-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--faq-rule);
  border-radius: 999px;
  color: var(--k-deep);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: background .25s var(--k-ease), color .25s var(--k-ease), border-color .25s var(--k-ease);
}

.page-faq__rail-link:hover {
  border-color: var(--k-red);
  color: var(--k-red);
}

.page-faq__rail-num {
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--faq-ink-faint);
}

.page-faq__rail-link[aria-current="true"] {
  background: var(--k-red);
  border-color: var(--k-red);
  color: var(--k-cream);
  font-weight: 700;
}

.page-faq__rail-link[aria-current="true"] .page-faq__rail-num {
  color: rgba(247, 243, 234, .75);
}

.page-faq__rail-note {
  margin-top: 18px;
  padding: 14px 16px;
  border-left: 3px solid var(--k-amber);
  background: rgba(245, 154, 35, .1);
  border-radius: 0 12px 12px 0;
}

.page-faq__rail-note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  font-weight: 300;
  color: var(--faq-ink-soft);
}

.page-faq__rail-note a {
  display: inline-block;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--k-red);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

/* 章节 */
.page-faq__section {
  scroll-margin-top: 108px;
}

.page-faq__section + .page-faq__section {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: clamp(30px, 4vw, 48px);
  border-top: 1px solid var(--faq-rule);
}

.page-faq__sec-head {
  display: grid;
  gap: 8px;
}

.page-faq__sec-num {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  font-variant-numeric: tabular-nums;
  color: var(--k-red);
}

.page-faq__sec-head .k-section__title {
  margin: 0;
}

.page-faq__sec-desc {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  font-weight: 300;
  color: var(--faq-ink-soft);
}

/* 图 */
.page-faq__figure {
  margin: 22px 0 0;
}

.page-faq__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--k-radius);
  object-fit: cover;
}

.page-faq__figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  font-weight: 300;
  color: var(--faq-ink-faint);
}

/* 设备步骤卡 */
.page-faq__devices {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 20px;
}

.page-faq__device {
  padding: 18px 18px 20px;
  border: 1px solid var(--faq-rule);
  border-radius: 16px;
  background: #fff;
}

.page-faq__device h3 {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 12px;
  font-size: 1.02rem;
  font-weight: 900;
  letter-spacing: .02em;
}

.page-faq__device h3::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--k-amber);
}

.page-faq__device:nth-child(2) h3::before {
  background: var(--k-red);
}

.page-faq__device:nth-child(3) h3::before {
  background: var(--k-teal);
}

.page-faq__device:nth-child(4) h3::before {
  background: var(--k-teal-light);
}

.page-faq__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
  display: grid;
  gap: 9px;
}

.page-faq__steps li {
  position: relative;
  counter-increment: faq-step;
  padding-left: 28px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--faq-ink-soft);
}

.page-faq__steps li::before {
  content: counter(faq-step);
  position: absolute;
  left: 0;
  top: 3px;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--k-red);
  color: var(--k-cream);
  font-size: 11px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* 手风琴 */
.page-faq__list {
  margin-top: 18px;
  border-top: 1px solid var(--faq-rule);
}

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

.page-faq__item > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 2px;
  list-style: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.55;
  transition: color .22s var(--k-ease);
}

.page-faq__item > summary::-webkit-details-marker {
  display: none;
}

.page-faq__item > summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-size: 22px;
  font-weight: 200;
  line-height: .95;
  color: var(--k-red);
  transition: transform .28s var(--k-ease);
}

.page-faq__item[open] > summary::after {
  transform: rotate(45deg);
}

.page-faq__item > summary:hover,
.page-faq__item[open] > summary {
  color: var(--k-red);
}

.page-faq__item p {
  margin: 0 0 18px;
  padding-left: 16px;
  border-left: 2px solid rgba(245, 154, 35, .55);
  font-size: 15px;
  line-height: 1.78;
  font-weight: 300;
  color: var(--faq-ink-soft);
}

.page-faq__item p a {
  color: var(--k-red);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 收尾 */
.page-faq__outro {
  margin-top: clamp(44px, 6vw, 76px);
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--k-radius);
  display: grid;
  gap: 20px;
  color: var(--k-cream);
  background:
    radial-gradient(120% 140% at 92% 0%, rgba(210, 59, 46, .55), transparent 62%),
    linear-gradient(130deg, var(--k-teal), var(--k-deep) 72%);
}

.page-faq__outro-title {
  margin: 0;
  font-size: clamp(1.25rem, 2.6vw, 1.7rem);
  font-weight: 900;
  letter-spacing: -.01em;
}

.page-faq__outro p {
  margin: 10px 0 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.78;
  font-weight: 300;
  color: rgba(247, 243, 234, .8);
}

.page-faq__outro-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-faq__outro .k-btn--ghost {
  color: var(--k-cream);
  border-color: rgba(247, 243, 234, .42);
}

.page-faq__outro .k-btn--ghost:hover {
  color: var(--k-gold);
  border-color: var(--k-gold);
}

.page-faq__top {
  font-size: 13px;
  color: rgba(247, 243, 234, .72);
  text-decoration: none;
  border-bottom: 1px solid rgba(247, 243, 234, .35);
  padding-bottom: 2px;
}

.page-faq__top:hover {
  color: var(--k-gold);
  border-color: var(--k-gold);
}

/* 响应式 */
@media (min-width: 640px) {
  .page-faq__devices {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq__body {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq__rail {
    position: sticky;
    top: 104px;
    border-bottom: 0;
    border-left: 2px solid var(--faq-rule);
    padding: 0 0 0 18px;
  }

  .page-faq__rail-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    margin-top: 14px;
  }

  .page-faq__rail-link {
    border: 0;
    border-radius: 0;
    padding: 10px 0 10px 4px;
    font-size: 15px;
  }

  .page-faq__rail-link[aria-current="true"] {
    background: transparent;
    color: var(--k-red);
    font-weight: 700;
    border-left: 2px solid var(--k-red);
    margin-left: -20px;
    padding-left: 18px;
  }

  .page-faq__rail-link[aria-current="true"] .page-faq__rail-num {
    color: var(--k-amber);
  }

  .page-faq__outro {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1100px) {
  .page-faq__hero::after {
    right: 10%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq__item > summary::after,
  .page-faq__rail-link {
    transition: none;
  }
}