.page-faq {
  --faq-hair: rgba(185, 200, 209, .7);
  --faq-card: var(--cool-100);
  background: var(--paper-050);
  color: var(--text-900);
}

/* 面包屑 */
.page-faq .faq-crumb {
  padding-top: 24px;
}
.page-faq .faq-crumb .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.page-faq .faq-crumb .breadcrumb__item {
  text-decoration: none;
  color: var(--text-muted);
}
.page-faq .faq-crumb a.breadcrumb__item:hover {
  color: var(--ink-800);
}
.page-faq .faq-crumb .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--cool-300);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 5vw, 48px) 0 clamp(34px, 6vw, 60px);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--amber-500), rgba(255, 176, 32, 0));
}
.page-faq .faq-hero__grid {
  display: grid;
  gap: 26px;
  align-items: start;
}
.page-faq .faq-hero__title {
  font-size: clamp(29px, 5.4vw, 54px);
  line-height: 1.1;
  letter-spacing: .04em;
  margin: 12px 0 18px;
  max-width: 16em;
}
.page-faq .faq-hero .lede {
  margin: 0;
  font-size: clamp(15px, 2.1vw, 17px);
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 36em;
}
.page-faq .faq-quick {
  position: relative;
  overflow: hidden;
  background: var(--ink-800);
  color: var(--paper-050);
  border-radius: var(--radius-l);
  padding: 24px 20px 20px;
  box-shadow: var(--shadow-soft);
}
.page-faq .faq-quick::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 120px;
  background: linear-gradient(180deg, rgba(255, 176, 32, .22), rgba(255, 176, 32, 0));
  pointer-events: none;
}
.page-faq .faq-quick__label {
  position: relative;
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--amber-200);
}
.page-faq .faq-quick__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .faq-quick__list a {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 13px 10px;
  border-radius: var(--radius-s);
  color: var(--paper-050);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  transition: background .25s var(--ease), color .25s var(--ease);
}
.page-faq .faq-quick__list li:last-child a {
  border-bottom: 0;
}
.page-faq .faq-quick__list a:hover {
  background: rgba(255, 255, 255, .09);
  color: var(--amber-200);
}
.page-faq .faq-quick__list .num {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--amber-500);
  font-variant-numeric: tabular-nums;
}

/* 双栏骨架 */
.page-faq .faq-layout {
  display: grid;
  gap: 30px;
  padding-bottom: clamp(48px, 8vw, 96px);
}
.page-faq .faq-body {
  min-width: 0;
}

/* 目录 */
.page-faq .faq-toc__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--text-muted);
}
.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-faq .faq-toc__list a {
  display: flex;
  gap: 9px;
  align-items: baseline;
  padding: 9px 15px;
  border-radius: 999px;
  background: var(--faq-card);
  color: var(--ink-600);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: background .25s var(--ease), color .25s var(--ease);
}
.page-faq .faq-toc__list a:hover {
  background: var(--amber-200);
  color: var(--ink-900);
}
.page-faq .faq-toc__num {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ink-600);
  font-variant-numeric: tabular-nums;
}

/* 内容区块 */
.page-faq .faq-block {
  padding-block: clamp(28px, 4.5vw, 52px);
}
.page-faq .faq-block + .faq-block {
  border-top: 1px solid var(--faq-hair);
}
.page-faq .faq-block__head {
  max-width: 42em;
  margin-bottom: clamp(20px, 3vw, 30px);
}
.page-faq .faq-block__title {
  margin: 10px 0 12px;
  font-size: clamp(21px, 3.2vw, 31px);
  line-height: 1.22;
  letter-spacing: .03em;
}
.page-faq .faq-block__head .body-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* 三步 */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-faq .step {
  background: var(--paper-050);
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius-m);
  padding: 20px 18px 22px;
}
.page-faq .step__num {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--amber-200);
  color: var(--ink-900);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
}
.page-faq .step__title {
  margin: 14px 0 8px;
  font-size: 18px;
  line-height: 1.3;
}
.page-faq .step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-900);
}
.page-faq .step__hint {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--faq-hair);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* 问答 */
.page-faq .qa-list {
  display: grid;
  gap: 10px;
}
.page-faq .qa {
  background: var(--faq-card);
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  padding: 1px 16px;
  transition: background .25s var(--ease), border-color .25s var(--ease);
}
.page-faq .qa[open] {
  background: var(--paper-050);
  border-color: var(--cool-300);
}
.page-faq .qa__q {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink-900);
}
.page-faq .qa__q::-webkit-details-marker {
  display: none;
}
.page-faq .qa__q::marker {
  content: "";
}
.page-faq .qa__num {
  flex: 0 0 auto;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.page-faq .qa__icon {
  position: relative;
  flex: 0 0 auto;
  margin-left: auto;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid var(--cool-300);
  transition: border-color .25s var(--ease);
}
.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  top: 50%;
  height: 1.5px;
  background: var(--ink-600);
  transform: translateY(-50%);
}
.page-faq .qa__icon::after {
  transform: translateY(-50%) rotate(90deg);
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}
.page-faq .qa[open] .qa__icon {
  border-color: var(--amber-500);
}
.page-faq .qa[open] .qa__icon::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}
.page-faq .qa__a {
  padding: 0 0 16px 30px;
}
.page-faq .qa__a p {
  margin: 0;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-muted);
}

/* 窄屏与显示 */
.page-faq .split {
  display: grid;
  gap: 22px;
}
.page-faq .split .body-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}
.page-faq .tips {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-faq .tips li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-900);
}
.page-faq .tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--amber-500);
}
.page-faq .split__media {
  margin: 0;
}
.page-faq .split__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-m);
  border: 1px solid var(--faq-hair);
}
.page-faq .media__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* 深色操作板 */
.page-faq .faq-block--board {
  border-top: 0;
  padding-block: clamp(16px, 3vw, 28px);
}
.page-faq .board {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--paper-050);
  border-radius: var(--radius-l);
  display: grid;
}
.page-faq .board::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--amber-500), rgba(255, 176, 32, 0));
  z-index: 2;
}
.page-faq .board__text {
  padding: clamp(24px, 4vw, 42px);
}
.page-faq .board__text .eyebrow {
  color: var(--amber-200);
}
.page-faq .board__title {
  margin: 10px 0 14px;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.28;
  letter-spacing: .03em;
  color: var(--paper-050);
}
.page-faq .board__text > p {
  margin: 0;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(247, 249, 249, .78);
}
.page-faq .board__steps {
  list-style: none;
  margin: 22px 0 26px;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-faq .board__steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
}
.page-faq .board__num {
  font-size: 21px;
  font-weight: 800;
  line-height: 1.15;
  color: var(--amber-500);
  font-variant-numeric: tabular-nums;
}
.page-faq .board__step-title {
  display: block;
  margin-bottom: 3px;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper-050);
}
.page-faq .board__step-text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(247, 249, 249, .7);
}
.page-faq .board__media {
  position: relative;
  margin: 0;
  min-height: 240px;
  max-height: 320px;
  overflow: hidden;
}
.page-faq .board__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}
.page-faq .board__media .media__caption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 12px;
  margin: 0;
  font-size: 12px;
  color: rgba(247, 249, 249, .8);
  text-shadow: 0 1px 6px rgba(4, 33, 27, .8);
}

/* 反馈 */
.page-faq .feedback {
  display: grid;
  gap: 18px;
  background: var(--cool-100);
  border: 1px solid var(--cool-300);
  border-left: 4px solid var(--signal-500);
  border-radius: var(--radius-m);
  padding: clamp(20px, 3vw, 28px);
}
.page-faq .feedback__title {
  margin: 0 0 8px;
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.3;
}
.page-faq .feedback p {
  margin: 0;
  max-width: 48em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-muted);
}
.page-faq .feedback__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 术语卡阵 */
.page-faq .terms {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-faq .term {
  background: var(--paper-050);
  border: 1px solid var(--cool-300);
  border-radius: var(--radius-s);
  padding: 14px 12px 12px;
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.page-faq .term:hover,
.page-faq .term:focus-within {
  transform: translateY(-4px);
  border-color: var(--amber-500);
  box-shadow: 0 12px 24px rgba(4, 33, 27, .1);
}
.page-faq .term__name {
  margin: 0 0 6px;
  font-size: 15px;
  line-height: 1.4;
  color: var(--ink-800);
}
.page-faq .term__desc {
  margin: 0 0 10px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--text-muted);
}
.page-faq .term__en {
  margin: 0;
  padding-top: 8px;
  border-top: 1px solid var(--faq-hair);
  font-size: 10.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color .3s var(--ease);
}
.page-faq .term:hover .term__en {
  color: var(--ink-600);
}

/* 断点 */
@media (min-width: 620px) {
  .page-faq .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
  .page-faq .terms {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 52px;
  }
  .page-faq .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .split {
    grid-template-columns: 5fr 7fr;
    gap: 40px;
    align-items: center;
  }
  .page-faq .feedback {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 28px;
  }
  .page-faq .board {
    grid-template-columns: 7fr 5fr;
  }
  .page-faq .board__media {
    max-height: none;
    height: 100%;
  }
  .page-faq .terms {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 10px;
  }
  .page-faq .term {
    padding: 12px 10px 10px;
  }
  .page-faq .term__desc {
    font-size: 12px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
  .page-faq .faq-toc {
    position: sticky;
    top: 96px;
  }
  .page-faq .faq-toc__label {
    padding-left: 16px;
  }
  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    border-left: 1px solid var(--cool-300);
  }
  .page-faq .faq-toc__list a {
    padding: 9px 0 9px 16px;
    margin-left: -1px;
    border-radius: 0;
    border-left: 2px solid transparent;
    background: transparent;
    color: var(--text-muted);
    white-space: normal;
    font-size: 14px;
  }
  .page-faq .faq-toc__list a:hover {
    background: rgba(255, 176, 32, .1);
    border-left-color: var(--amber-500);
    color: var(--ink-800);
  }
  .page-faq .qa__a p {
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .term,
  .page-faq .term__en,
  .page-faq .qa,
  .page-faq .qa__icon,
  .page-faq .qa__icon::after,
  .page-faq .faq-quick__list a {
    transition: none;
  }
  .page-faq .term:hover,
  .page-faq .term:focus-within {
    transform: none;
  }
}