.page-faq {
  background: var(--ink);
  color: var(--white);
}

.page-faq .container {
  padding-inline: 20px;
}

/* ---------- HERO ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 32px 0 44px;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -18%;
  width: 78%;
  height: 170%;
  background: linear-gradient(150deg, rgba(124, 92, 255, 0.22), rgba(43, 227, 208, 0.08) 52%, rgba(5, 9, 20, 0) 76%);
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}

.page-faq .faq-hero__title {
  font-size: clamp(2.05rem, 6.6vw, 4.3rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 14px 0 18px;
  max-width: 15ch;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 46ch;
  color: var(--gray);
  font-size: 1rem;
  line-height: 1.8;
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}

.page-faq .faq-hero__meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 14px 7px 12px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.page-faq .faq-hero__meta-k {
  font-size: 0.75rem;
  color: var(--gray);
}

.page-faq .faq-hero__meta-v {
  font-size: 0.8125rem;
  color: var(--cyan);
}

.page-faq .faq-hero__media {
  margin: 0;
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
  border: 1px solid var(--line);
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 60%, rgba(124, 92, 255, 0));
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 800;
  object-fit: cover;
}

@media (min-width: 881px) {
  .page-faq .faq-hero {
    padding: 52px 0 60px;
  }
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: end;
  }
  .page-faq .faq-hero__media {
    transform: translateY(8px);
  }
}

/* ---------- 场景索引带 ---------- */

.page-faq .faq-index {
  border-block: 1px solid var(--line);
  background: var(--ink-2);
}

.page-faq .faq-index__inner {
  display: flex;
  gap: 10px;
  padding-block: 14px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index__inner::-webkit-scrollbar {
  height: 4px;
}

.page-faq .faq-index__inner::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-faq .faq-chip {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--white);
  font-size: 0.875rem;
  line-height: 1.4;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: background 0.22s ease, border-color 0.22s ease;
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  background: #1b2748;
  border-color: var(--cyan);
}

.page-faq .faq-chip__num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-chip--signal .faq-chip__num {
  color: var(--orange);
}

/* ---------- 主体网格 ---------- */

.page-faq .faq-body {
  padding-block: 40px 72px;
}

.page-faq .faq-body__grid {
  display: grid;
  gap: 40px;
}

@media (min-width: 881px) {
  .page-faq .faq-body {
    padding-block: 56px 96px;
  }
  .page-faq .faq-body__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
    align-items: start;
  }
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  position: relative;
  padding: 30px 0 12px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 80px;
}

.page-faq .faq-group:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-group:target {
  background: linear-gradient(90deg, rgba(43, 227, 208, 0.07), rgba(43, 227, 208, 0) 72%);
  box-shadow: inset 2px 0 0 var(--cyan);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  color: var(--cyan);
  flex: 0 0 auto;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.35rem, 3.4vw, 1.9rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-faq .faq-group__lede {
  margin: 10px 0 20px;
  max-width: 58ch;
  color: var(--gray);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* ---------- 手风琴 ---------- */

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

.page-faq .faq-q {
  margin: 0;
}

.page-faq .accordion__trigger {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 18px 4px 18px 0;
  background: none;
  border: 0;
  color: var(--gray);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: color 0.2s ease;
}

.page-faq .accordion__trigger:hover,
.page-faq .accordion__trigger:focus-visible {
  color: var(--white);
}

.page-faq .accordion__item[data-open] .accordion__trigger,
.page-faq .accordion__trigger[aria-expanded="true"] {
  color: var(--white);
  font-weight: 700;
}

.page-faq .faq-q__num {
  flex: 0 0 auto;
  padding-top: 0.4em;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--line);
  transition: color 0.2s ease;
}

.page-faq .accordion__item[data-open] .faq-q__num,
.page-faq .accordion__trigger[aria-expanded="true"] .faq-q__num {
  color: var(--cyan);
}

.page-faq .faq-q__text {
  flex: 1 1 auto;
}

.page-faq .faq-q__mark {
  position: relative;
  flex: 0 0 auto;
  align-self: center;
  width: 14px;
  height: 14px;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.page-faq .faq-q__mark::before {
  inset: 6px 0 auto 0;
  height: 2px;
}

.page-faq .faq-q__mark::after {
  inset: 0 auto 0 6px;
  width: 2px;
}

.page-faq .accordion__item[data-open] .faq-q__mark::after,
.page-faq .accordion__trigger[aria-expanded="true"] .faq-q__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .accordion__panel[hidden] {
  display: none;
}

.page-faq .accordion__panel {
  padding: 2px 0 24px 0;
  position: relative;
}

.page-faq .accordion__panel::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 6px;
  bottom: 20px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(43, 227, 208, 0.06));
}

.page-faq .faq-answer {
  margin: 0 0 14px;
  color: var(--white);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-faq .faq-steps__list {
  counter-reset: faq-step;
  list-style: none;
  margin: 0 0 14px;
  padding: 0 0 0 28px;
  position: relative;
}

.page-faq .faq-steps__list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 10px;
  width: 1px;
  background: var(--line);
}

.page-faq .faq-steps__list li {
  counter-increment: faq-step;
  position: relative;
  padding-bottom: 12px;
  color: var(--gray);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-faq .faq-steps__list li:last-child {
  padding-bottom: 0;
}

.page-faq .faq-steps__list li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: -28px;
  top: 0.15em;
  padding: 2px 0;
  background: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-note {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  color: var(--gray);
  font-size: 0.875rem;
  line-height: 1.7;
}

.page-faq .faq-note a,
.page-faq .faq-steps__list a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 227, 208, 0.35);
}

.page-faq .faq-note a:hover,
.page-faq .faq-steps__list a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-figure {
  margin: 20px 0 0;
  padding: 0;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  overflow: hidden;
  background: var(--ink-2);
  max-width: 320px;
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 14px;
  color: var(--gray);
  font-size: 0.8125rem;
  line-height: 1.65;
}

/* ---------- 转人工 ---------- */

.page-faq .faq-human {
  margin-top: 44px;
  padding: 30px 22px 32px;
  background: linear-gradient(158deg, var(--panel), var(--ink-2) 62%);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
  scroll-margin-top: 80px;
}

.page-faq .faq-human__title {
  margin: 12px 0 18px;
  font-size: clamp(1.35rem, 3.6vw, 2rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  max-width: 22ch;
}

.page-faq .faq-human__list {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
}

.page-faq .faq-human__list li {
  position: relative;
  padding: 0 0 14px 22px;
  color: var(--gray);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-faq .faq-human__list li:last-child {
  padding-bottom: 0;
}

.page-faq .faq-human__dot {
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--orange);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.page-faq .faq-human__facts {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: 22px;
}

.page-faq .faq-fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background: var(--ink-2);
}

.page-faq .faq-fact__k {
  color: var(--gray);
  font-size: 0.8125rem;
}

.page-faq .faq-fact__v {
  color: var(--orange);
  font-size: 0.875rem;
}

.page-faq .faq-human__text {
  margin: 0 0 22px;
  max-width: 52ch;
  color: var(--white);
  font-size: 0.9375rem;
  line-height: 1.75;
}

@media (min-width: 720px) {
  .page-faq .faq-human {
    padding: 38px 36px 40px;
  }
  .page-faq .faq-human__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-fact {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* ---------- 侧栏兜底面板 ---------- */

.page-faq .faq-side {
  position: relative;
}

@media (min-width: 881px) {
  .page-faq .faq-side {
    position: sticky;
    top: 84px;
  }
}

.page-faq .faq-side__card {
  padding: 26px 22px 28px;
  background: linear-gradient(165deg, #16203c, var(--ink-2) 70%);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.page-faq .faq-side__index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.24em;
  color: var(--orange);
}

.page-faq .faq-side__title {
  margin: 0 0 12px;
  font-size: 1.25rem;
  font-weight: 900;
  line-height: 1.3;
}

.page-faq .faq-side__text {
  margin: 0 0 20px;
  color: var(--gray);
  font-size: 0.875rem;
  line-height: 1.75;
}

.page-faq .faq-copy {
  display: block;
  width: 100%;
  padding: 14px 16px;
  margin-bottom: 22px;
  text-align: left;
  background: rgba(43, 227, 208, 0.08);
  border: 1px solid rgba(43, 227, 208, 0.4);
  color: var(--white);
  font-family: var(--font-sans);
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: background 0.22s ease, border-color 0.22s ease;
}

.page-faq .faq-copy:hover,
.page-faq .faq-copy:focus-visible {
  background: rgba(43, 227, 208, 0.16);
  border-color: var(--cyan);
}

.page-faq .faq-copy[data-copied] {
  border-color: var(--orange);
  background: rgba(255, 122, 46, 0.14);
}

.page-faq .faq-copy__label {
  display: block;
  margin-bottom: 6px;
  color: var(--cyan);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.page-faq .faq-copy__value {
  display: block;
  font-size: 0.8125rem;
  line-height: 1.5;
  word-break: break-all;
}

.page-faq .faq-side__list {
  margin: 0 0 20px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-side__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-side__row dt {
  color: var(--white);
  font-size: 0.8125rem;
}

.page-faq .faq-side__row dd {
  margin: 0;
  color: var(--gray);
  font-size: 0.8125rem;
  text-align: right;
}

.page-faq .faq-side__link {
  display: inline-block;
  color: var(--cyan);
  font-size: 0.875rem;
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 227, 208, 0.4);
}

.page-faq .faq-side__link:hover {
  border-bottom-color: var(--cyan);
}

@media (max-width: 880px) {
  .page-faq .faq-side__card {
    padding: 22px 18px 24px;
  }
  .page-faq .faq-side__row {
    flex-direction: column;
    gap: 4px;
  }
  .page-faq .faq-side__row dd {
    text-align: left;
  }
}

/* ---------- 降低动态偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .accordion__trigger,
  .page-faq .faq-q__mark::before,
  .page-faq .faq-q__mark::after,
  .page-faq .faq-copy,
  .page-faq .faq-q__num {
    transition-duration: 0.01ms;
  }
}