.page-faq {
  --faq-gap: clamp(18px, 2.4vw, 28px);
  --faq-space: clamp(34px, 4.6vw, 62px);
  --faq-dim: rgba(233, 239, 234, 0.76);
  background: var(--ink-900);
  color: var(--paper);
  padding-bottom: clamp(52px, 7vw, 100px);
}

.page-faq h1,
.page-faq h2 {
  font-family: var(--sans);
}

.page-faq .mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- Hero ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--head-h) + 30px) 0 clamp(28px, 4vw, 54px);
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(120% 88% at 88% 0%, rgba(92, 225, 194, 0.16), transparent 58%),
    linear-gradient(160deg, rgba(22, 51, 43, 0.96) 0%, rgba(18, 20, 22, 0.98) 58%, var(--ink-900) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 76%, 0 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: 10%;
  width: 48vw;
  height: 1px;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
  background: linear-gradient(90deg, transparent, var(--lime), transparent);
  transform: rotate(-24deg);
}

.page-faq .faq-hero__shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  margin-top: clamp(16px, 2.2vw, 28px);
}

.page-faq .faq-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-kicker::before {
  content: "";
  flex: none;
  width: 34px;
  height: 1px;
  background: currentColor;
}

.page-faq h1 {
  margin: 0;
  max-width: 20ch;
  font-size: clamp(29px, 4.6vw, 54px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.page-faq .faq-hero__intro {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 54ch;
  font-size: clamp(14.5px, 1.5vw, 16.5px);
  line-height: 1.8;
  color: var(--faq-dim);
}

.page-faq .faq-hero__figure {
  margin: 0;
  padding-top: 10px;
  border-top: 2px solid var(--lime);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--ink-700);
  clip-path: polygon(0 0, 100% 5%, 100% 100%, 4% 100%);
}

.page-faq .faq-hero__cap {
  margin: 10px 0 0;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mute);
}

/* ---------- 三步图解 ---------- */
.page-faq .faq-steps {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: clamp(24px, 3.4vw, 44px) 0 0;
  padding: 0;
  background: var(--rule);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 2px 12px;
  align-items: baseline;
  padding: 15px 14px 17px;
  background: rgba(11, 31, 26, 0.94);
}

.page-faq .faq-steps__no {
  grid-column: 1;
  grid-row: 1;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-faq .faq-steps__t {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-faq .faq-steps__d {
  grid-column: 2;
  grid-row: 2;
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mute);
}

/* ---------- 热门索引 ---------- */
.page-faq .faq-hot {
  margin-top: clamp(26px, 3.8vw, 48px);
}

.page-faq .faq-hot__head {
  margin-bottom: 14px;
}

.page-faq .faq-hot__head h2 {
  margin: 0;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-faq .faq-hot__sub {
  margin: 6px 0 0;
  font-size: 13.5px;
  color: var(--mute);
}

.page-faq .faq-hot__list {
  list-style: none;
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.page-faq .faq-hot__a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 12px;
  align-items: center;
  padding: 13px 16px;
  text-decoration: none;
  color: var(--paper);
  background: rgba(18, 20, 22, 0.82);
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%);
  transition: background 0.12s var(--ease), border-color 0.12s var(--ease);
}

.page-faq .faq-hot__a:hover,
.page-faq .faq-hot__a:focus-visible {
  background: var(--ink-700);
  border-color: var(--lime);
}

.page-faq .faq-hot__no {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .faq-hot__q {
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.5;
}

.page-faq .faq-hot__tag {
  grid-column: 2;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(28px, 4.2vw, 54px);
}

.page-faq .faq-side__label {
  margin: 0 0 10px;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-faq .faq-side__list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 14px;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}

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

.page-faq .faq-side__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 0;
  font-size: 13.5px;
  line-height: 1.5;
  color: rgba(233, 239, 234, 0.72);
  text-decoration: none;
  transition: color 0.12s var(--ease), padding-left 0.12s var(--ease);
}

.page-faq .faq-side__link .mono {
  flex: none;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.page-faq .faq-side__link:hover,
.page-faq .faq-side__link:focus-visible {
  color: var(--lime);
  padding-left: 6px;
}

.page-faq .faq-side__note {
  margin-top: 18px;
  padding: 16px;
  background: var(--ink-800);
  border-top: 2px solid var(--ember);
}

.page-faq .faq-side__note .faq-side__note-k {
  margin: 0 0 8px;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ember);
}

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

.page-faq .faq-side__note .btn {
  margin-top: 6px;
}

/* ---------- 问答画布 ---------- */
.page-faq .faq-canvas {
  min-width: 0;
  display: grid;
  gap: var(--faq-space);
}

.page-faq .faq-sec {
  --faq-accent: var(--lime);
  scroll-margin-top: calc(var(--head-h) + 20px);
}

.page-faq .faq-sec--data {
  --faq-accent: var(--cyan);
}

.page-faq .faq-sec--support {
  --faq-accent: var(--ember);
}

.page-faq .faq-sec__head {
  margin-bottom: 14px;
  padding-left: 14px;
  border-left: 2px solid var(--faq-accent);
}

.page-faq .faq-sec__idx {
  margin: 0 0 6px;
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-faq .faq-sec__idx span {
  color: var(--faq-accent);
}

.page-faq .faq-sec__head h2 {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

.page-faq .faq-sec__lead {
  margin: 8px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-dim);
}

.page-faq .qa-list {
  margin-top: 6px;
}

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

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

.page-faq .qa__q {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding: 15px 0;
  list-style: none;
  cursor: pointer;
  font-size: clamp(14.5px, 1.6vw, 16.5px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  transition: color 0.12s var(--ease);
}

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

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

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

.page-faq .qa[open] .qa__q {
  color: var(--lime);
}

.page-faq .qa__sign {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 1px solid var(--rule);
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--lime);
  transform: translate(-50%, -50%);
}

.page-faq .qa__sign::before {
  width: 9px;
  height: 1.5px;
}

.page-faq .qa__sign::after {
  width: 1.5px;
  height: 9px;
  transition: transform 0.18s var(--ease), opacity 0.18s var(--ease);
}

.page-faq .qa[open] .qa__sign::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.page-faq .qa__a {
  margin: 0 0 16px;
  padding-left: 14px;
  border-left: 1px solid var(--faq-accent);
  max-width: 64ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--faq-dim);
}

.page-faq .qa__a p {
  margin: 0 0 10px;
}

.page-faq .qa__a p:last-child {
  margin-bottom: 0;
}

/* ---------- 数据面板插图 ---------- */
.page-faq .faq-shot {
  margin: 0 0 clamp(16px, 2.2vw, 26px);
  padding: 10px;
  background: var(--ink-800);
  border: 1px solid var(--rule);
  border-top: 2px solid var(--cyan);
}

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

.page-faq .faq-shot figcaption {
  margin-top: 8px;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mute);
}

/* ---------- 结尾 ---------- */
.page-faq .faq-final__box {
  position: relative;
  padding: clamp(20px, 3vw, 34px);
  background: linear-gradient(150deg, rgba(22, 51, 43, 0.9), rgba(18, 20, 22, 0.98));
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%);
}

.page-faq .faq-final__box h2 {
  margin: 0 0 10px;
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-faq .faq-final__text {
  margin: 0 0 18px;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--faq-dim);
}

.page-faq .faq-final__contact {
  margin: 0 0 20px;
  padding: 0;
  border-top: 1px dashed var(--rule);
}

.page-faq .faq-final__row {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px dashed var(--rule);
}

.page-faq .faq-final__row dt {
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .faq-final__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-final__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-final__links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 20px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--rule);
}

.page-faq .faq-final__links a {
  font-size: 13px;
  color: var(--mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.12s var(--ease), border-color 0.12s var(--ease);
}

.page-faq .faq-final__links a:hover,
.page-faq .faq-final__links a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

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

@media (min-width: 760px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: end;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 246px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 64px);
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--head-h) + 18px);
    align-self: start;
  }

  .page-faq .faq-side__list {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-hot__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hot__a,
  .page-faq .faq-side__link,
  .page-faq .qa__q,
  .page-faq .qa__sign::after,
  .page-faq .faq-final__links a {
    transition: none;
  }
}

@media print {
  .page-faq {
    background: #ffffff;
    color: #121416;
  }

  .page-faq .faq-hero::before,
  .page-faq .faq-hero::after,
  .page-faq .faq-side__note,
  .page-faq .faq-hero__figure,
  .page-faq .faq-shot {
    display: none;
  }

  .page-faq .qa {
    break-inside: avoid;
  }

  .page-faq .qa__a {
    color: #121416;
  }
}