.page-faq {
  --faq-no-col: 30px;
  --faq-no-gap: 12px;
  background: var(--ink-night);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 54px;
  background:
    radial-gradient(120% 92% at 86% 6%, rgba(47, 227, 214, 0.16), transparent 58%),
    radial-gradient(94% 80% at 4% 104%, rgba(110, 31, 60, 0.42), transparent 62%),
    linear-gradient(166deg, var(--ink-night) 0%, var(--ink-deep) 56%, var(--teal-darker) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(154, 166, 196, 0.085) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(154, 166, 196, 0.085) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.15) 100%);
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.15) 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -170px;
  right: -130px;
  width: 360px;
  height: 360px;
  background: linear-gradient(140deg, rgba(255, 107, 61, 0.26), rgba(47, 227, 214, 0.05) 72%);
  transform: rotate(26deg);
  pointer-events: none;
}

.page-faq .faq-hero__top {
  position: relative;
  z-index: 2;
  padding-top: 6px;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 30px;
  padding-top: 24px;
}

.page-faq .eyebrow {
  margin: 0;
  color: var(--fog);
}

.page-faq .display-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 8.6vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.015em;
}

.page-faq .display-title__line {
  display: block;
}

.page-faq .display-title__line--accent {
  color: var(--cyan);
}

.page-faq .lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.8;
  color: rgba(244, 246, 248, 0.82);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .metric__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-faq .metric__value--cyan {
  color: var(--cyan);
}

.page-faq .metric__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--fog);
}

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

.page-faq .faq-hero__figure .figure-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(152deg, rgba(47, 227, 214, 0.14), rgba(11, 18, 48, 0.66));
  box-shadow: 0 20px 52px rgba(0, 0, 0, 0.44);
}

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

.page-faq .faq-hero__figure .data-note {
  margin: 12px 0 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fog);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 28px;
  padding-top: 48px;
  padding-bottom: 72px;
}

.page-faq .faq-index {
  position: relative;
  padding-left: 16px;
  border-left: 1px solid var(--line);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 0;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--fog);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--mint);
}

.page-faq .faq-index__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 章节 ---------- */
.page-faq .faq-chapter {
  position: relative;
  margin-bottom: 20px;
  padding: 26px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(162deg, rgba(16, 26, 58, 0.94), rgba(11, 18, 48, 0.9));
}

.page-faq .faq-chapter::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  bottom: 26px;
  width: 2px;
  background: linear-gradient(to bottom, var(--cyan), rgba(47, 227, 214, 0) 92%);
}

.page-faq .faq-chapter--account {
  border-color: rgba(47, 227, 214, 0.24);
}

.page-faq .faq-chapter--data {
  background: linear-gradient(162deg, rgba(12, 71, 68, 0.92), rgba(6, 43, 41, 0.95));
  border-color: rgba(47, 227, 214, 0.28);
}

.page-faq .faq-chapter--data::before {
  background: linear-gradient(to bottom, var(--goal), rgba(255, 107, 61, 0) 92%);
}

.page-faq .faq-chapter--client {
  background: linear-gradient(162deg, rgba(51, 38, 94, 0.94), rgba(29, 23, 64, 0.94));
  border-color: rgba(138, 243, 230, 0.22);
}

.page-faq .faq-chapter--support {
  background: linear-gradient(162deg, rgba(110, 31, 60, 0.94), rgba(74, 20, 48, 0.94));
  border-color: rgba(255, 107, 61, 0.3);
}

.page-faq .faq-chapter--support::before {
  background: linear-gradient(to bottom, var(--goal), rgba(255, 107, 61, 0) 92%);
}

.page-faq .faq-chapter--next {
  background: var(--paper);
  border-color: rgba(27, 34, 51, 0.16);
  color: var(--graphite);
}

.page-faq .faq-chapter--next::before {
  background: linear-gradient(to bottom, var(--wine), rgba(110, 31, 60, 0) 92%);
}

.page-faq .faq-chapter__head {
  margin-bottom: 16px;
}

.page-faq .section-index {
  margin: 0;
  color: var(--cyan);
}

.page-faq .faq-chapter h2 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 5vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.012em;
}

.page-faq .faq-chapter__lead {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(244, 246, 248, 0.72);
}

.page-faq .faq-chapter--next .section-index {
  color: var(--wine);
}

.page-faq .faq-chapter--next .faq-chapter__lead {
  color: rgba(27, 34, 51, 0.74);
}

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

.page-faq .faq-chapter__figure .figure-frame {
  border: 1px solid rgba(255, 107, 61, 0.34);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(140deg, rgba(255, 107, 61, 0.14), rgba(6, 43, 41, 0.7));
}

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

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
}

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

.page-faq .faq-item:first-of-type {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-item__head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: var(--faq-no-col) minmax(0, 1fr) 16px;
  gap: var(--faq-no-gap);
  align-items: start;
  width: 100%;
  padding: 15px 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  font-size: 16px;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: color 0.18s var(--ease);
}

.page-faq .faq-q:hover {
  color: var(--mint);
}

.page-faq .faq-q__no {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--cyan);
}

.page-faq .faq-q__icon {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

.page-faq .faq-q__icon::before,
.page-faq .faq-q__icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  opacity: 0.7;
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

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

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

.page-faq .faq-item:has(.faq-a:not([hidden])) .faq-q__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-q[aria-expanded="true"] {
  color: var(--paper);
}

.page-faq .faq-q[aria-expanded="true"] .faq-q__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-a {
  margin-left: calc(var(--faq-no-col) + var(--faq-no-gap));
  padding: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 246, 248, 0.76);
}

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

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

.page-faq .faq-chapter--next .faq-q__no,
.page-faq .faq-chapter--next .faq-q[aria-expanded="true"] {
  color: var(--wine);
}

.page-faq .faq-chapter--next .faq-q {
  color: var(--graphite);
}

.page-faq .faq-chapter--next .faq-q:hover {
  color: var(--wine);
}

.page-faq .faq-chapter--next .faq-a {
  color: rgba(27, 34, 51, 0.78);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-chapter--next .btn--ghost {
  border-color: rgba(27, 34, 51, 0.32);
  color: var(--graphite);
}

.page-faq .faq-chapter--next .btn--ghost:hover {
  border-color: var(--wine);
  color: var(--wine);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero {
    padding: 40px 0 72px;
  }

  .page-faq .faq-chapter {
    margin-bottom: 26px;
    padding: 34px 32px 28px;
  }

  .page-faq .faq-q {
    padding: 17px 0;
  }

  .page-faq .faq-body {
    padding-bottom: 96px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.95fr);
    gap: 56px;
    align-items: center;
    padding-top: 34px;
  }

  .page-faq .faq-body {
    grid-template-columns: 212px minmax(0, 1fr);
    gap: 52px;
    padding-top: 68px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-a {
    max-width: 64ch;
  }

  .page-faq .faq-chapter {
    padding: 40px 40px 32px;
  }
}