.page-faq {
  --faq-cut: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
  --faq-cut-sm: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -12%;
  width: min(520px, 72vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 62% 38%, rgba(53, 224, 196, .16), rgba(53, 224, 196, 0) 64%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-faq .faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-cyan);
}

.page-faq .faq-hero__kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--c-cyan);
}

.page-faq .faq-hero__copy h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.4vw, 54px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--c-white);
  text-wrap: balance;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 48ch;
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.92;
  color: var(--c-white);
  opacity: .82;
}

.page-faq .faq-hero__quick {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__quick li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-faq .faq-hero__quick .num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--c-amber);
}

.page-faq .faq-hero__media {
  margin: 0;
  background: var(--c-ink);
  clip-path: var(--faq-cut);
  box-shadow: inset 0 0 0 1px var(--line-strong);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.72) contrast(1.06);
}

/* ---------- 分类标签 ---------- */
.page-faq .faq-tabs {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(5, 23, 19, .6), rgba(5, 23, 19, 0));
}

.page-faq .faq-tabs__list {
  display: flex;
  gap: 10px;
  padding-block: 14px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-tabs__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-tabs__link {
  flex: 0 0 auto;
  padding: 9px 18px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--c-white);
  text-decoration: none;
  clip-path: var(--faq-cut-sm);
  box-shadow: inset 0 0 0 1px var(--c-cyan);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-tabs__link:hover,
.page-faq .faq-tabs__link:focus-visible {
  background: var(--c-blue);
  box-shadow: inset 0 0 0 1px var(--c-cyan), inset 0 -2px 0 0 var(--c-amber);
  outline: none;
}

/* ---------- 问答区块 ---------- */
.page-faq .faq-block {
  scroll-margin-top: calc(var(--header-h) + var(--rail-h) + 18px);
}

.page-faq .faq-block__list {
  margin-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  background: linear-gradient(90deg, rgba(53, 224, 196, .07), rgba(53, 224, 196, 0) 72%);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 18px 6px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-item__q:focus-visible {
  outline: 1px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-faq .faq-item__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-cyan);
}

.page-faq .faq-item__text {
  font-family: var(--font-display);
  font-size: clamp(15px, 1.8vw, 17px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-white);
}

.page-faq .faq-item__sign {
  position: relative;
  width: 16px;
  height: 16px;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: calc(50% - .75px);
  height: 1.5px;
  background: var(--c-cyan);
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-item__sign::after {
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: rotate(0deg);
}

.page-faq .faq-item__a {
  padding: 0 6px 22px;
  font-size: 15px;
  line-height: 1.86;
  color: var(--c-mist);
  animation: faq-unfold var(--dur) var(--ease) both;
}

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

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

.page-faq .faq-item__a a {
  color: var(--c-cyan);
  text-underline-offset: 3px;
}

.page-faq .faq-item__tip {
  margin-top: 12px;
  padding-left: 14px;
  border-left: 2px solid var(--c-amber);
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-white);
  opacity: .86;
}

@keyframes faq-unfold {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 术语速查表 ---------- */
.page-faq .faq-glossary {
  margin-top: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-glossary__table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .faq-glossary__table thead th {
  padding: 12px 18px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--c-mist);
  background: rgba(18, 54, 92, .34);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-glossary__table tbody th {
  width: 26%;
  padding: 14px 18px;
  text-align: left;
  vertical-align: top;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-white);
  white-space: nowrap;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-glossary__table td {
  padding: 14px 18px;
  vertical-align: top;
  line-height: 1.75;
  color: var(--c-mist);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-glossary__table tbody tr:last-child th,
.page-faq .faq-glossary__table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .faq-glossary__table tbody tr:hover {
  background: rgba(53, 224, 196, .06);
}

.page-faq .faq-glossary__table tbody tr:hover th {
  color: var(--c-cyan);
}

/* ---------- 联系客服 ---------- */
.page-faq .faq-contact {
  scroll-margin-top: calc(var(--header-h) + var(--rail-h) + 18px);
}

.page-faq .faq-contact__media {
  margin: 0 0 clamp(26px, 4vw, 40px);
  background: var(--c-ink);
  clip-path: var(--faq-cut);
  box-shadow: inset 0 0 0 1px var(--line-strong);
}

.page-faq .faq-contact__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.68) contrast(1.08);
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3vw, 34px);
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: var(--faq-cut);
}

.page-faq .faq-contact__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.6vw, 28px);
  background: rgba(5, 23, 19, .74);
}

.page-faq .faq-contact__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-cyan);
}

.page-faq .faq-contact__val {
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.9vw, 18px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-white);
  word-break: break-all;
}

.page-faq .faq-contact__val--text {
  font-family: var(--font-display);
  font-weight: 500;
  word-break: normal;
}

.page-faq .faq-contact__hint {
  font-size: 13px;
  line-height: 1.72;
  color: var(--c-mist);
}

.page-faq .faq-contact__note {
  margin: 22px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--c-amber);
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-white);
  opacity: .9;
}

.page-faq .faq-contact__note a {
  color: var(--c-cyan);
  text-underline-offset: 3px;
}

/* ---------- 收尾指引 ---------- */
.page-faq .faq-next__panel {
  display: grid;
  gap: 22px;
  align-items: center;
  padding: clamp(22px, 3.6vw, 42px);
}

.page-faq .faq-next__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-cyan);
}

.page-faq .faq-next__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.28;
  color: var(--c-white);
}

.page-faq .faq-next__text {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.86;
  color: var(--c-mist);
}

.page-faq .faq-next__cta {
  justify-self: start;
  white-space: nowrap;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-item__a {
    padding-left: calc(6px + 2.6em);
  }
}

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

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

@media (min-width: 940px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: clamp(36px, 4vw, 60px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after,
  .page-faq .faq-item,
  .page-faq .faq-tabs__link {
    transition: none;
  }
}