.page-faq {
  --faq-line: rgba(18, 225, 195, .26);
  --faq-line-soft: rgba(138, 147, 172, .3);
  --faq-panel: rgba(34, 16, 70, .48);
  --faq-hard: 5px 5px 0 var(--black);
  background: var(--ink);
  color: var(--text);
}

/* ————— 首屏 ————— */
.page-faq .faq-hero {
  position: relative;
  padding: 28px 0 60px;
  border-bottom: 2px solid var(--faq-line);
  background:
    radial-gradient(760px 320px at 88% -20%, rgba(18, 225, 195, .18), transparent 68%),
    radial-gradient(520px 260px at 4% 112%, rgba(255, 122, 26, .12), transparent 72%),
    linear-gradient(155deg, var(--ink) 42%, var(--violet) 100%);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -6%;
  bottom: -130px;
  width: 62%;
  height: 300px;
  background: repeating-linear-gradient(-6deg, rgba(18, 225, 195, .1) 0 2px, transparent 2px 18px);
  pointer-events: none;
}

.page-faq .faq-crumb-sep {
  margin: 0 8px;
  color: var(--slate);
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  margin-top: 22px;
}

.page-faq .faq-hero__title {
  margin: 12px 0 18px;
  font-size: clamp(31px, 6.2vw, 58px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-faq .faq-hero__title em {
  font-style: normal;
  color: var(--teal);
  text-shadow: 3px 3px 0 rgba(5, 7, 15, .9);
}

.page-faq .faq-hero__lede {
  max-width: 60ch;
  margin: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.78;
  color: var(--text);
}

.page-faq .faq-status {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: 26px;
  padding: 14px 16px;
  border: 2px solid var(--faq-line);
  border-left: 4px solid var(--teal);
  background: rgba(5, 7, 15, .62);
  box-shadow: var(--faq-hard);
}

.page-faq .faq-status__v {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--teal);
}

.page-faq .faq-status__text {
  font-size: 13px;
  color: var(--slate);
}

/* 索引 */
.page-faq .faq-index {
  padding: 18px 18px 14px;
  border: 2px solid var(--faq-line-soft);
  border-top: 3px solid var(--orange);
  background: rgba(5, 7, 15, .55);
  box-shadow: var(--faq-hard);
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--slate);
}

.page-faq .faq-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 2px;
  border-bottom: 1px solid rgba(138, 147, 172, .18);
  color: var(--text);
  font-size: 14px;
  line-height: 1.45;
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-index__list li:last-child .faq-index__link {
  border-bottom: 0;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--teal);
  padding-left: 8px;
  border-color: var(--teal);
}

.page-faq .faq-index__no {
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 700;
  color: var(--orange);
}

/* ————— 通用区块头 ————— */
.page-faq .faq-h2 {
  margin: 10px 0 12px;
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--text);
}

/* ————— 两栏布局 ————— */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

/* ————— 问答列表 ————— */
.page-faq .faq-list {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-faq .faq-item {
  border: 2px solid var(--faq-line-soft);
  background: linear-gradient(180deg, var(--faq-panel), rgba(11, 16, 38, .82));
  box-shadow: var(--faq-hard);
  transition: border-color var(--dur-mid) var(--ease), box-shadow var(--dur-mid) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--teal-soft);
}

.page-faq .faq-item[open] {
  border-color: var(--teal);
  box-shadow: var(--faq-hard), 0 0 20px rgba(18, 225, 195, .22);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}

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

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

.page-faq .faq-q:hover,
.page-faq .faq-q:focus-visible {
  color: var(--teal-soft);
}

.page-faq .faq-q__no {
  font-size: 17px;
  font-weight: 700;
}

.page-faq .faq-q__mark {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: var(--teal);
  transition: transform var(--dur-mid) var(--ease), background var(--dur-mid) var(--ease);
}

.page-faq .faq-q__mark::before {
  left: 0;
  right: 0;
  top: 8px;
  height: 2px;
}

.page-faq .faq-q__mark::after {
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
}

.page-faq .faq-item[open] .faq-q__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-q__mark::before {
  background: var(--orange);
}

.page-faq .faq-a {
  padding: 16px 18px 20px 52px;
  border-top: 2px dashed rgba(138, 147, 172, .24);
}

.page-faq .faq-a__why {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

/* ————— 旁注 ————— */
.page-faq .faq-note {
  padding: 18px;
  border: 2px solid var(--faq-line-soft);
  border-top: 3px solid var(--orange);
  background: rgba(5, 7, 15, .6);
  box-shadow: var(--faq-hard);
}

.page-faq .faq-note--plain {
  margin-top: 18px;
  border-top-color: var(--teal);
}

.page-faq .faq-note__title {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-faq .faq-note--plain .faq-note__title {
  color: var(--teal);
}

.page-faq .faq-note__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-note__list li {
  position: relative;
  padding: 8px 0 8px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  border-bottom: 1px solid rgba(138, 147, 172, .16);
}

.page-faq .faq-note__list li:last-child {
  border-bottom: 0;
}

.page-faq .faq-note__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 6px;
  height: 6px;
  background: var(--teal);
}

.page-faq .faq-note__foot {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 2px dashed rgba(138, 147, 172, .2);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ————— 图片 ————— */
.page-faq .faq-figure {
  margin: 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--faq-line-soft);
  background: var(--ink);
}

/* ————— 版本号拆解 ————— */
.page-faq .faq-ver {
  margin-top: 24px;
  border: 2px solid var(--faq-line-soft);
  background: rgba(5, 7, 15, .5);
  box-shadow: var(--faq-hard);
}

.page-faq .faq-ver__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding: 18px;
  border-bottom: 2px solid var(--faq-line);
  background: linear-gradient(100deg, rgba(18, 225, 195, .1), transparent 62%);
}

.page-faq .faq-ver__value {
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--teal);
}

.page-faq .faq-ver__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-ver__item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px;
  border-bottom: 1px solid rgba(138, 147, 172, .18);
}

.page-faq .faq-ver__item:last-child {
  border-bottom: 0;
}

.page-faq .faq-ver__seg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 2px solid var(--teal);
  font-size: 20px;
  font-weight: 700;
  color: var(--teal);
  background: rgba(18, 225, 195, .08);
}

.page-faq .faq-ver__body h3 {
  margin: 2px 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .faq-ver__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

/* ————— 排查顺序 ————— */
.page-faq .faq-flow__lede {
  max-width: 56ch;
}

.page-faq .faq-svg-wrap {
  margin-top: 28px;
  padding-bottom: 6px;
  overflow-x: auto;
}

.page-faq .faq-steps {
  display: block;
  width: 100%;
  min-width: 620px;
  height: auto;
}

.page-faq .faq-flow__list {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-faq .faq-flow__step {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px;
  border: 2px solid var(--faq-line-soft);
  border-left: 4px solid var(--teal);
  background: rgba(11, 16, 38, .7);
  box-shadow: var(--faq-hard);
  transition: border-color var(--dur-mid) var(--ease), transform var(--dur-mid) var(--ease);
}

.page-faq .faq-flow__step:hover {
  border-color: var(--teal);
  transform: translate(-2px, -2px);
}

.page-faq .faq-flow__step--accent {
  border-left-color: var(--orange);
  background: linear-gradient(100deg, rgba(255, 122, 26, .1), rgba(11, 16, 38, .8) 60%);
}

.page-faq .faq-flow__num {
  font-size: 24px;
  font-weight: 700;
  color: var(--teal);
  line-height: 1.2;
}

.page-faq .faq-flow__step--accent .faq-flow__num {
  color: var(--orange);
}

.page-faq .faq-flow__body h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .faq-flow__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-flow__body .btn {
  margin-top: 14px;
}

/* ————— 设备与显示（亮色章节） ————— */
.page-faq .faq-device {
  padding: 64px 0;
  background: var(--paper);
  color: var(--ink);
  border-top: 3px solid var(--teal);
  border-bottom: 3px solid var(--teal);
}

.page-faq .faq-device__label {
  color: var(--slate);
}

.page-faq .faq-device__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  margin-top: 10px;
}

.page-faq .faq-device__h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-faq .faq-device__lede {
  margin: 0 0 24px;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.75;
  color: #3B4463;
}

.page-faq .faq-device__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-faq .faq-device__item {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 18px;
  background: #FFFFFF;
  border: 2px solid rgba(11, 16, 38, .16);
  border-left: 4px solid var(--orange);
  box-shadow: 4px 4px 0 rgba(11, 16, 38, .12);
}

.page-faq .faq-device__k {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 4px 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  background: rgba(18, 225, 195, .3);
  border: 2px solid var(--ink);
}

.page-faq .faq-device__item h3 {
  margin: 2px 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-device__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: #4A5474;
}

.page-faq .faq-device__tip {
  margin: 22px 0 0;
  padding: 14px 16px;
  border-left: 4px solid var(--teal);
  background: rgba(18, 225, 195, .14);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-faq .faq-device__aside .faq-figure img {
  border-color: var(--ink);
  background: #FFFFFF;
}

/* ————— 收尾 ————— */
.page-faq .faq-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  margin-top: 12px;
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 24px;
}

.page-faq .faq-next__contact {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-next__contact .mono {
  color: var(--teal);
}

.page-faq .faq-next__contactnote {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.page-faq .faq-next__cards {
  display: grid;
  gap: 16px;
}

.page-faq .faq-next__card {
  padding: 20px;
}

.page-faq .faq-next__card h3 {
  margin: 10px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .faq-next__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate);
}

.page-faq .faq-next__link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 700;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-next__link:hover,
.page-faq .faq-next__link:focus-visible {
  color: var(--teal-soft);
  border-color: var(--teal-soft);
}

/* 键盘可达 */
.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 3px;
}

/* ————— 平板及以上 ————— */
@media (min-width: 700px) {
  .page-faq .faq-ver__item {
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 20px;
  }

  .page-faq .faq-ver__seg {
    width: 56px;
    height: 56px;
    font-size: 22px;
  }

  .page-faq .faq-flow__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-next__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-faq .faq-hero {
    padding: 36px 0 76px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-split__narrow {
    position: sticky;
    top: 84px;
  }

  .page-faq .faq-flow__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-flow__step {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .page-faq .faq-device__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-next__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
    gap: 48px;
    align-items: start;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-q {
    gap: 10px;
    padding: 14px;
    font-size: 15px;
  }

  .page-faq .faq-a {
    padding: 14px 14px 18px 14px;
  }

  .page-faq .faq-ver__item {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
    padding: 16px 14px;
  }

  .page-faq .faq-ver__seg {
    width: 42px;
    height: 42px;
    font-size: 18px;
  }

  .page-faq .faq-flow__step {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
    padding: 16px 14px;
  }

  .page-faq .faq-flow__num {
    font-size: 20px;
  }

  .page-faq .faq-device__item {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    padding: 14px;
  }

  .page-faq .faq-device__k {
    justify-self: start;
  }

  .page-faq .faq-steps {
    min-width: 560px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}