.page-faq {
  --faq-rule: rgba(191, 247, 242, 0.16);
  --faq-text: rgba(244, 239, 228, 0.76);
  --faq-text-strong: #F4EFE4;
  background: var(--ink-900);
  color: var(--faq-text-strong);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(26px, 5vw, 52px) 0 clamp(34px, 6vw, 68px);
  background: linear-gradient(158deg, var(--ink-900) 0%, var(--ink-800) 58%, var(--ink-700) 100%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 204, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 204, 0.07) 1px, transparent 1px);
  background-size: 54px 54px;
  -webkit-mask-image: linear-gradient(118deg, #000 0%, rgba(0, 0, 0, 0.35) 52%, transparent 82%);
  mask-image: linear-gradient(118deg, #000 0%, rgba(0, 0, 0, 0.35) 52%, transparent 82%);
  pointer-events: none;
  z-index: -1;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: 46%;
  height: 150%;
  background: linear-gradient(180deg, rgba(0, 229, 204, 0.12), rgba(0, 229, 204, 0) 72%);
  border-left: 1px solid rgba(0, 229, 204, 0.22);
  transform: skewX(-15deg);
  pointer-events: none;
  z-index: -1;
}

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

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(16px, 3vw, 26px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-faq .breadcrumb__link {
  color: rgba(191, 247, 242, 0.72);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-faq .breadcrumb__link:hover,
.page-faq .breadcrumb__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .breadcrumb__link[aria-current="page"] {
  color: var(--paper);
  border-bottom-color: rgba(191, 247, 242, 0.32);
}

.page-faq .breadcrumb__sep {
  color: rgba(191, 247, 242, 0.4);
}

.page-faq .faq-hero__label {
  margin: 0 0 14px;
  padding-left: 10px;
  border-left: 2px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0 0 clamp(12px, 2vw, 18px);
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 5.4vw, 3.3rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: 0.04em;
  color: var(--paper-light);
}

.page-faq .faq-hero__lead {
  margin: 0 0 clamp(20px, 3vw, 28px);
  max-width: 62ch;
  font-size: clamp(0.98rem, 1.5vw, 1.06rem);
  line-height: 1.78;
  color: var(--faq-text);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 0;
  padding: clamp(14px, 2vw, 18px) 0 0;
  border-top: 1px solid var(--faq-rule);
  list-style: none;
  font-size: 0.86rem;
  color: var(--faq-text);
}

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

.page-faq .faq-hero__num {
  font-family: var(--font-mono);
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

/* 布局 */
.page-faq .faq-layout {
  padding: clamp(30px, 5vw, 64px) 0 clamp(44px, 7vw, 88px);
}

.page-faq .faq-rail {
  margin-bottom: clamp(26px, 5vw, 44px);
  padding-bottom: clamp(20px, 3vw, 28px);
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-rail__head {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: rgba(191, 247, 242, 0.72);
}

.page-faq .faq-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--faq-rule);
  border-radius: 999px;
  font-size: 0.86rem;
  color: rgba(244, 239, 228, 0.84);
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--line-strong);
  color: var(--paper-light);
}

.page-faq .faq-rail__note {
  display: none;
}

/* 内容块 */
.page-faq .faq-body {
  display: grid;
  gap: clamp(34px, 5vw, 62px);
}

.page-faq .faq-block {
  position: relative;
  padding-top: clamp(26px, 4vw, 40px);
  border-top: 1px solid var(--faq-rule);
  scroll-margin-top: 96px;
}

.page-faq .faq-block__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq .faq-block__label--dark {
  color: #0B7A6E;
}

.page-faq .faq-block__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.2vw, 1.95rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.3;
  color: var(--paper-light);
}

.page-faq .faq-block__lead {
  margin: 0 0 clamp(18px, 3vw, 28px);
  max-width: 60ch;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--faq-text);
}

/* 步骤轨道 */
.page-faq .faq-steps {
  display: grid;
  gap: 16px;
  margin: 0 0 clamp(20px, 3vw, 28px);
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  padding-left: 14px;
  border-left: 1px solid var(--line-strong);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-step__title {
  margin: 0 0 5px;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--paper-light);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.68;
  color: var(--faq-text);
}

/* 图文分栏 */
.page-faq .faq-split {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--faq-rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

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

.page-faq .faq-figure .media__caption {
  padding: 9px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(191, 247, 242, 0.7);
  border-top: 1px solid var(--faq-rule);
}

/* 问答折叠 */
.page-faq .faq-list {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-list--tight {
  margin-bottom: 0;
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-faq .faq-item__num {
  flex: none;
  min-width: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--faq-text-strong);
  transition: color 0.18s ease;
}

.page-faq .faq-item__mark {
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 4px;
  border-right: 2px solid var(--cyan-soft);
  border-bottom: 2px solid var(--cyan-soft);
  transform: rotate(45deg);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-item__q:hover .faq-item__text {
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__text {
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(225deg);
  border-color: var(--cyan);
}

.page-faq .faq-item__a {
  max-width: 68ch;
  padding: 0 0 18px 34px;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--faq-text);
}

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

.page-faq .faq-item__a ol,
.page-faq .faq-item__a ul {
  margin: 0;
  padding-left: 1.2em;
}

.page-faq .faq-item__a li {
  margin-bottom: 6px;
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 204, 0.45);
}

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

/* 联系面板 */
.page-faq .faq-contact {
  background: linear-gradient(168deg, var(--paper-light) 0%, var(--paper) 100%);
  border-top: 0;
  border-radius: var(--radius);
  padding: clamp(22px, 4vw, 40px);
  color: var(--ink-900);
  box-shadow: 0 26px 48px -34px rgba(0, 0, 0, 0.9);
}

.page-faq .faq-contact .faq-block__title {
  color: var(--ink-900);
}

.page-faq .faq-contact .faq-block__lead {
  color: rgba(6, 18, 38, 0.74);
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: 12px 28px;
  margin-bottom: 18px;
}

.page-faq .faq-contact__item {
  padding-top: 10px;
  border-top: 1px solid rgba(6, 18, 38, 0.16);
}

.page-faq .faq-contact__key {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(6, 18, 38, 0.55);
}

.page-faq .faq-contact__val {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.6;
  color: var(--ink-900);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: 0 0 20px;
  padding-left: 12px;
  border-left: 2px solid var(--amber);
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(6, 18, 38, 0.66);
}

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

.page-faq .faq-contact__ghost {
  color: var(--ink-900);
  border-color: rgba(6, 18, 38, 0.32);
}

.page-faq .faq-contact__ghost:hover,
.page-faq .faq-contact__ghost:focus-visible {
  border-color: var(--ink-900);
}

/* 响应式 */
@media (min-width: 720px) {
  .page-faq .faq-contact__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-split {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }

  .page-faq .faq-split--reverse {
    grid-template-columns: 0.95fr 1.05fr;
  }

  .page-faq .faq-split--reverse .faq-figure {
    order: -1;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: 224px minmax(0, 1fr);
    column-gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-faq .faq-rail__link {
    padding: 10px 0 10px 14px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    font-size: 0.9rem;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, rgba(0, 229, 204, 0.12), rgba(0, 229, 204, 0));
    color: var(--paper-light);
  }

  .page-faq .faq-rail__note {
    display: block;
    margin: 18px 0 0;
    padding-top: 14px;
    border-top: 1px dashed var(--faq-rule);
    font-size: 0.82rem;
    line-height: 1.7;
    color: rgba(191, 247, 242, 0.6);
  }

  .page-faq .faq-rail__head {
    padding-bottom: 10px;
    border-bottom: 1px solid var(--faq-rule);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-item__q {
    padding: 18px 0;
  }

  .page-faq .faq-item__text {
    font-size: 1.02rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__mark,
  .page-faq .faq-item__text,
  .page-faq .faq-rail__link,
  .page-faq .breadcrumb__link {
    transition: none;
  }
}