.page-faq {
  --faq-index-w: 250px;
  --faq-radius: 2px;
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(16px, 3vw, 32px) clamp(30px, 5vw, 62px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -90px -12vw auto -12vw;
  height: 130%;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(56% 50% at 84% 6%, rgba(56, 225, 198, 0.14) 0%, rgba(56, 225, 198, 0) 62%),
    radial-gradient(46% 44% at 2% 24%, rgba(198, 255, 74, 0.1) 0%, rgba(198, 255, 74, 0) 58%);
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 66px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: balance;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-hero__media {
  --media-ratio: 3 / 2;
  margin: 0;
}

.page-faq .faq-hero__media .media__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mute);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4vw, 42px);
  border: 1px solid var(--line);
  background: var(--line-soft);
}

.page-faq .faq-fact {
  padding: 14px 16px 16px;
  background: rgba(11, 31, 26, 0.78);
}

.page-faq .faq-fact__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.2vw, 20px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--lime);
}

.page-faq .faq-fact__key {
  margin: 7px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mute);
}

/* ===== 双栏骨架 ===== */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(22px, 4vw, 38px);
}

.page-faq .faq-answers {
  min-width: 0;
}

/* ===== 左侧索引 ===== */
.page-faq .faq-index {
  min-width: 0;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__item {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 13px;
  border: 1px solid var(--line);
  border-left: 3px solid transparent;
  border-radius: var(--faq-radius);
  background: rgba(10, 24, 48, 0.5);
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease),
    background-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--text);
  border-left-color: var(--cyan);
  background: rgba(18, 42, 36, 0.88);
  transform: translateX(2px);
  outline: none;
}

.page-faq .faq-index__link:focus-visible {
  box-shadow: 0 0 0 2px rgba(56, 225, 198, 0.45);
}

.page-faq .faq-index__link.is-current,
.page-faq .faq-index__link.is-active {
  color: var(--lime);
  border-color: var(--line-strong);
  border-left-color: var(--lime);
  background: rgba(18, 42, 36, 0.95);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mute);
  transition: color 0.22s var(--ease);
}

.page-faq .faq-index__link.is-current .faq-index__num,
.page-faq .faq-index__link.is-active .faq-index__num {
  color: var(--lime);
}

/* ===== 问题分组 ===== */
.page-faq .faq-block {
  scroll-margin-top: calc(var(--header-h) + 26px);
  padding-block: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-block__head {
  display: grid;
  gap: 10px;
}

.page-faq .faq-block__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.6vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(198, 255, 74, 0.62);
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-block__lead {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ===== 问答折叠 ===== */
.page-faq .faq-qa {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-left: 3px solid rgba(198, 255, 74, 0.3);
  border-radius: var(--faq-radius);
  background: var(--panel);
  transition: border-color 0.24s var(--ease), box-shadow 0.24s var(--ease),
    transform 0.24s var(--ease);
}

.page-faq .faq-qa:hover {
  border-left-color: var(--cyan);
}

.page-faq .faq-qa[open] {
  border-left-color: var(--lime);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.42);
}

.page-faq .faq-qa__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.6;
  color: var(--text);
}

.page-faq .faq-qa__idx {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-qa__q {
  display: block;
  min-width: 0;
}

.page-faq .faq-qa .expand__body {
  padding: 14px 16px 18px;
  border-top: 1px dashed var(--line-soft);
}

.page-faq .faq-qa__a {
  margin: 0;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ===== 小屏端流程示意 ===== */
.page-faq .faq-flow {
  margin-top: 18px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: rgba(10, 24, 48, 0.6);
}

.page-faq .faq-flow__svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ===== 分组内插图 ===== */
.page-faq .faq-inline-media {
  --media-ratio: 3 / 2;
  margin: 20px 0 0;
}

.page-faq .faq-inline-media .media__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mute);
}

/* ===== 联系卡 ===== */
.page-faq .faq-contact {
  margin-top: 24px;
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--line-strong);
  border-radius: var(--faq-radius);
  background: linear-gradient(135deg, rgba(18, 42, 36, 0.96) 0%, rgba(10, 24, 48, 0.96) 100%);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.42);
}

.page-faq .faq-contact__eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 12px 0;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-contact__row:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-contact__label {
  flex: 0 0 auto;
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mute);
}

.page-faq .faq-contact__value {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.5;
  color: var(--text);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mute);
}

.page-faq .faq-block__more {
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-block__more a {
  color: var(--lime);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-faq .faq-block__more a:hover {
  color: var(--cyan);
}

/* ===== 响应式 ===== */
@media (max-width: 999px) {
  .page-faq .faq-index {
    border-bottom: 1px solid var(--line);
    padding-bottom: 12px;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    gap: clamp(36px, 5vw, 72px);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }

  .page-faq .faq-index__inner {
    position: sticky;
    top: calc(var(--header-h) + 30px);
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 4px;
    padding-bottom: 0;
    overflow: visible;
  }

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

  .page-faq .faq-index__link {
    width: 100%;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    transform: translateX(4px);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-index__link {
    font-size: 14.5px;
  }

  .page-faq .faq-qa__summary {
    padding: 17px 20px;
  }

  .page-faq .faq-qa .expand__body {
    padding: 16px 20px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-qa {
    transition: none;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    transform: none;
  }
}