.page-faq {
  --faq-line: rgba(157, 182, 200, 0.22);
  --faq-line-hot: rgba(45, 226, 208, 0.5);
  --faq-pad: clamp(20px, 4vw, 44px);
  position: relative;
  overflow-x: hidden;
  padding-bottom: clamp(64px, 10vw, 120px);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  padding: clamp(34px, 6vw, 76px) 0 clamp(28px, 5vw, 52px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -16% -10% auto -22%;
  height: 560px;
  background:
    radial-gradient(58% 55% at 28% 0%, rgba(45, 226, 208, 0.16), transparent 70%),
    radial-gradient(46% 46% at 84% 14%, rgba(155, 140, 255, 0.14), transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero > * {
  position: relative;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.4vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.04em;
  color: var(--mist);
  max-width: 20em;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 66ch;
  color: var(--tide);
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.85;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__chips li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  border: 1px solid rgba(45, 226, 208, 0.28);
  padding: 7px 12px;
}

/* 通用章节头 */
.page-faq .faq-head {
  display: grid;
  gap: 12px;
  max-width: 58ch;
}

.page-faq .faq-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.8vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.03em;
  color: var(--mist);
}

.page-faq .faq-head__note {
  margin: 0;
  color: var(--tide);
  font-size: 15px;
  line-height: 1.85;
}

/* 三步路径 */
.page-faq .faq-route {
  margin-top: clamp(26px, 5vw, 56px);
  border: 1px solid var(--faq-line);
  padding: var(--faq-pad);
  background:
    linear-gradient(155deg, rgba(11, 36, 56, 0.94), rgba(6, 26, 43, 0.55)),
    repeating-linear-gradient(90deg, rgba(157, 182, 200, 0.06) 0 1px, transparent 1px 96px);
}

.page-faq .faq-route__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(22px, 3.4vw, 34px);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 28px);
}

.page-faq .faq-steps__item {
  position: relative;
  display: grid;
  gap: 8px;
  padding-left: 58px;
}

.page-faq .faq-steps__num {
  position: absolute;
  left: 0;
  top: -2px;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--faq-line-hot);
  border-radius: 50%;
  background: rgba(45, 226, 208, 0.07);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-steps__item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 20px;
  top: 46px;
  bottom: -18px;
  width: 1px;
  background: linear-gradient(180deg, rgba(45, 226, 208, 0.45), rgba(157, 182, 200, 0.08));
}

.page-faq .faq-steps__title {
  margin: 9px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-faq .faq-steps__text {
  margin: 0;
  color: var(--tide);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-steps__jump {
  justify-self: start;
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(45, 226, 208, 0.4);
  padding-bottom: 2px;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-faq .faq-steps__jump:hover {
  color: var(--mist);
  border-bottom-color: var(--mist);
}

/* 图版 */
.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--faq-line);
  background: var(--night);
  align-self: start;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--faq-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--tide);
}

/* 筛选 */
.page-faq .faq-filter,
.page-faq .faq-alert,
.page-faq .faq-stats,
.page-faq .faq-mobile,
.page-faq .faq-answers {
  margin-top: clamp(52px, 8vw, 104px);
}

.page-faq .faq-filter__grid {
  display: grid;
  gap: clamp(20px, 4vw, 44px);
}

.page-faq .faq-ruler {
  display: none;
}

.page-faq .faq-dims {
  margin: clamp(20px, 3vw, 28px) 0 clamp(18px, 3vw, 24px);
  padding: 0;
  display: grid;
}

.page-faq .faq-dims__row {
  display: grid;
  gap: 6px;
  padding: clamp(16px, 2.4vw, 22px) 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-dims__row:last-child {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-dims dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-dims dd {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

.page-faq .faq-tip {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--lava);
  color: var(--tide);
  font-size: 14px;
  line-height: 1.8;
}

/* 提醒 */
.page-faq .faq-alert__grid {
  display: grid;
  gap: clamp(22px, 3.5vw, 36px);
  margin-top: clamp(22px, 3.4vw, 32px);
}

.page-faq .faq-mini {
  margin: 0;
  padding-left: 1.2em;
  display: grid;
  gap: 10px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-mini li::marker {
  color: var(--cyan);
  font-family: var(--font-mono);
}

.page-faq .faq-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-faq .faq-alert__side {
  padding-top: 4px;
}

.page-faq .faq-alert__stat {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--tide);
}

.page-faq .faq-alert__stat .sig-data {
  display: block;
  font-size: clamp(28px, 4.4vw, 40px);
  letter-spacing: -0.02em;
  color: var(--lava);
}

.page-faq .faq-alert__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--tide);
}

.page-faq .faq-band {
  margin-top: clamp(24px, 4vw, 40px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--faq-line);
  border-left: 1px solid var(--faq-line);
}

.page-faq .faq-band__cell {
  display: grid;
  gap: 6px;
  padding: clamp(14px, 2.4vw, 20px);
  border-right: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-band__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--tide);
}

.page-faq .faq-band__v {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--cyan);
}

/* 战绩 */
.page-faq .faq-stats {
  border: 1px solid var(--faq-line);
  padding: var(--faq-pad);
  background: linear-gradient(118deg, rgba(18, 54, 77, 0.92), rgba(6, 26, 43, 0.62) 64%);
}

.page-faq .faq-stats__flag {
  display: inline-block;
  margin-bottom: 16px;
  padding: 6px 20px 6px 12px;
  background: var(--cyan);
  color: var(--abyss);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}

.page-faq .faq-stats__lead {
  margin: 12px 0 0;
  max-width: 60ch;
  color: var(--tide);
  font-size: 15px;
  line-height: 1.85;
}

.page-faq .faq-stats__list {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0;
  padding: 0;
  display: grid;
}

.page-faq .faq-stats__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 15px 0;
  border-top: 1px solid rgba(157, 182, 200, 0.16);
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-stats__list li:last-child {
  border-bottom: 1px solid rgba(157, 182, 200, 0.16);
}

.page-faq .faq-stats__list li::before {
  content: "";
  width: 6px;
  height: 6px;
  margin-top: 10px;
  background: var(--lava);
  transform: rotate(45deg);
}

.page-faq .faq-stats__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
}

.page-faq .faq-stats__link {
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(45, 226, 208, 0.4);
  padding-bottom: 2px;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-faq .faq-stats__link:hover {
  color: var(--mist);
  border-bottom-color: var(--mist);
}

/* 小屏 */
.page-faq .faq-mobile__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-faq .faq-mobile__list {
  list-style: none;
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-mobile__list li {
  position: relative;
  padding-left: 18px;
  color: var(--tide);
  font-size: 15px;
  line-height: 1.82;
}

.page-faq .faq-mobile__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-faq .faq-mobile__list strong {
  color: var(--mist);
  font-weight: 700;
}

.page-faq .faq-device {
  margin: 0 auto;
  width: min(300px, 100%);
  padding: 12px 12px 0;
  border: 1px solid rgba(45, 226, 208, 0.35);
  border-radius: 26px;
  background: linear-gradient(180deg, rgba(11, 36, 56, 0.96), rgba(6, 26, 43, 0.98));
  box-shadow: 0 30px 60px -44px rgba(45, 226, 208, 0.55);
}

.page-faq .faq-device img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 16px;
  object-fit: cover;
}

.page-faq .faq-device figcaption {
  padding: 12px 4px 14px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--tide);
}

/* 问答 */
.page-faq .faq-answers__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-faq .faq-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 18px;
}

.page-faq .faq-index a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  color: var(--tide);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid rgba(157, 182, 200, 0.12);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--faq-line-hot);
}

.page-faq .faq-index .sig-data {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  opacity: 0.75;
}

.page-faq .faq-groups {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

.page-faq .faq-group__title {
  margin: 0 0 6px;
  padding-bottom: 12px;
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-bottom: 1px solid var(--faq-line-hot);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.6vw, 22px);
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-faq .faq-group__title .sig-data {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-q {
  border-bottom: 1px solid var(--faq-line);
  transition: border-color var(--t) var(--ease);
}

.page-faq .faq-q summary {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--mist);
  transition: color var(--t) var(--ease);
}

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

.page-faq .faq-q summary:hover,
.page-faq .faq-q[open] summary {
  color: var(--cyan);
}

.page-faq .faq-q[open] {
  border-bottom-color: rgba(45, 226, 208, 0.42);
}

.page-faq .faq-q__mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

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

.page-faq .faq-q__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1px;
}

.page-faq .faq-q__mark::after {
  left: 6px;
  top: 0;
  width: 1px;
  height: 14px;
}

.page-faq .faq-q[open] .faq-q__mark::after {
  transform: rotate(90deg);
}

.page-faq .faq-q__body {
  padding: 0 4px 22px;
  max-width: 66ch;
}

.page-faq .faq-q__body p {
  margin: 0;
  color: var(--tide);
  font-size: 15px;
  line-height: 1.85;
}

.page-faq .faq-contact__more {
  margin: 18px 0 0;
}

.page-faq .faq-contact__more a {
  font-size: 14px;
  color: var(--lava);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 122, 61, 0.5);
  padding-bottom: 2px;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-faq .faq-contact__more a:hover {
  color: var(--mist);
  border-bottom-color: var(--mist);
}

/* 断点 */
@media (min-width: 760px) {
  .page-faq .faq-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-route__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-faq .faq-alert__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: start;
  }

  .page-faq .faq-alert__side {
    border-left: 1px solid var(--faq-line);
    padding-left: clamp(16px, 3vw, 28px);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-filter__grid {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: stretch;
  }

  .page-faq .faq-ruler {
    display: block;
    border-left: 1px solid var(--faq-line);
    background-image: repeating-linear-gradient(
      180deg,
      rgba(45, 226, 208, 0.4) 0 1px,
      transparent 1px 28px
    );
    background-size: 12px 100%;
    background-position: left top;
    background-repeat: no-repeat;
  }

  .page-faq .faq-mobile__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    align-items: center;
  }

  .page-faq .faq-dims__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-answers__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 112px;
  }

  .page-faq .faq-index ol {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition: none !important;
    animation: none !important;
  }
}