.page-faq {
  --faq-gap: clamp(24px, 4vw, 56px);
  --faq-indent: clamp(0px, 3vw, 48px);
  color: var(--mist);
  background: var(--night);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 4px;
  font-size: var(--fs-annot);
  color: var(--fog);
}
.page-faq .breadcrumb a {
  color: var(--fog);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-faq .breadcrumb a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-faq .breadcrumb[aria-label] span[aria-current="page"] {
  color: var(--mist);
}
.page-faq .breadcrumb__sep {
  color: var(--iron);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(40px, 6vw, 72px);
  overflow: hidden;
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 62%;
  background:
    radial-gradient(120% 100% at 8% 0%, rgba(18, 160, 106, .28), transparent 62%),
    linear-gradient(180deg, rgba(44, 224, 194, .10), transparent 70%);
  clip-path: polygon(0 0, 100% 0, 100% 82%, 0 100%);
  pointer-events: none;
}
.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: center;
}
.page-faq .faq-hero__copy .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-faq .faq-hero__copy .eyebrow::before {
  content: "";
  width: 34px;
  height: 3px;
  background: var(--jade);
}
.page-faq .faq-hero h1 {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7.4vw, 78px);
  line-height: .96;
  letter-spacing: -.02em;
  color: var(--mist);
}
.page-faq .faq-hero h1 br {
  display: none;
}
.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--fog);
}
.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-faq .faq-hero__quick .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  font-weight: 700;
  text-decoration: none;
  border: var(--line);
  border-radius: 2px;
}
.page-faq .faq-hero__figure {
  margin: 0;
  position: relative;
  border: var(--line);
  box-shadow: var(--shadow-hard);
  background: var(--slate);
}
.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
  filter: saturate(.92) contrast(1.05);
}
.page-faq .faq-hero__figure figcaption {
  padding: 12px 16px;
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--fog);
  border-top: var(--line);
  background: var(--navy);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

/* 左侧索引 */
.page-faq .faq-index {
  border-left: 6px solid var(--jade);
  padding: 4px 0 4px 18px;
  background: linear-gradient(90deg, rgba(18, 160, 106, .12), transparent 70%);
}
.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--fog);
}
.page-faq .faq-index__list {
  display: flex;
  flex-direction: column;
}
.page-faq .faq-index__item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 10px 12px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--iron);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
  min-height: 44px;
}
.page-faq .faq-index__item:hover,
.page-faq .faq-index__item[data-active] {
  color: var(--cyan);
  padding-left: 8px;
}
.page-faq .faq-index__item--amber[data-active],
.page-faq .faq-index__item--amber:hover {
  color: var(--amber);
}
.page-faq .faq-index__num {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--jade);
  min-width: 26px;
}
.page-faq .faq-index__item--amber .faq-index__num {
  color: var(--amber);
}
.page-faq .faq-index__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fog);
}

/* 右侧问答流 */
.page-faq .faq-stream {
  display: flex;
  flex-direction: column;
  gap: clamp(40px, 6vw, 76px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 130px;
  border-top: var(--line);
  padding-top: 24px;
}
.page-faq .faq-group--amber {
  border-top-color: var(--amber);
}
.page-faq .faq-group__head {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 20px;
}
.page-faq .faq-group__no {
  font-family: var(--font-serif);
  font-size: clamp(34px, 5vw, 54px);
  line-height: .9;
  color: var(--jade);
  flex: none;
}
.page-faq .faq-group--amber .faq-group__no {
  color: var(--amber);
}
.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.05;
  letter-spacing: -.01em;
  color: var(--mist);
}
.page-faq .faq-group__sub {
  margin: 8px 0 0;
  font-size: var(--fs-annot);
  line-height: 1.7;
  color: var(--fog);
}

.page-faq .faq-figure {
  margin: 0 0 24px;
  border: var(--line);
  background: var(--slate);
  box-shadow: var(--shadow-hard);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-figure figcaption {
  padding: 10px 16px;
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--fog);
  border-top: var(--line);
}

/* 折叠问答条目 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--iron);
}
.page-faq .faq-item summary {
  position: relative;
  display: block;
  padding: 20px 40px 20px 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.1vw, 21px);
  line-height: 1.45;
  color: var(--mist);
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) var(--ease);
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--cyan);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-faq .faq-item[open] summary::after {
  content: "−";
  color: var(--amber);
}
.page-faq .faq-item summary:hover {
  color: var(--cyan);
}
.page-faq .faq-item summary:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}
.page-faq .faq-item .disclosure__body {
  padding: 0 0 22px var(--faq-indent);
  max-width: 36em;
  border-left: 3px solid var(--iron);
  padding-left: clamp(12px, 2vw, 22px);
}
.page-faq .faq-item .disclosure__body p {
  margin: 0 0 10px;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--fog);
}
.page-faq .faq-item .disclosure__body p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-item--amber .disclosure__body {
  border-left-color: var(--amber);
}
.page-faq .faq-item--amber .disclosure__body p {
  color: var(--mist);
}
.page-faq .faq-item .disclosure__body a,
.page-faq .faq-more__copy a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(44, 224, 194, .45);
}
.page-faq .faq-item .disclosure__body a:hover,
.page-faq .faq-more__copy a:hover {
  border-bottom-color: var(--cyan);
}
.page-faq .faq-link {
  display: inline-block;
  font-weight: 700;
}

/* ---------- 还有问题 ---------- */
.page-faq .faq-more {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  padding: clamp(26px, 4vw, 44px);
  background: var(--navy);
  border: var(--line);
  box-shadow: var(--shadow-hard);
  clip-path: polygon(0 0, 100% 2.5%, 100% 100%, 0 97.5%);
  scroll-margin-top: 130px;
}
.page-faq .faq-more__copy .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--jade);
  margin: 0;
}
.page-faq .faq-more__copy h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.05;
  color: var(--mist);
}
.page-faq .faq-more__copy p {
  margin: 14px 0 0;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--fog);
  max-width: 32em;
}
.page-faq .faq-more__contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 20px;
  border-top: 1px solid var(--iron);
}
.page-faq .faq-more__contact .footer-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
}
.page-faq .faq-more__contact .footer-contact__key {
  min-width: 76px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--fog);
}
.page-faq .faq-more__contact .footer-contact__value {
  font-size: 16px;
  color: var(--mist);
  line-height: 1.6;
  word-break: break-word;
}
.page-faq .faq-more__contact .footer-contact__value--mono {
  font-family: var(--font-mono);
  color: var(--cyan);
}
.page-faq .faq-more__contact .copy-btn {
  min-height: 36px;
  padding: 0 14px;
  font-size: 13px;
  font-family: var(--font-body);
  color: var(--mist);
  background: transparent;
  border: 2px solid var(--iron);
  border-radius: 2px;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-faq .faq-more__contact .copy-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}
.page-faq .faq-more__contact .copy-btn[data-copied] {
  border-color: var(--amber);
  color: var(--amber);
}
.page-faq .faq-more__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fog);
}
.page-faq .faq-more__contact .btn {
  align-self: flex-start;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  font-weight: 700;
  text-decoration: none;
  border: var(--line);
  border-radius: 2px;
}

/* ---------- 滚动定位补偿 ---------- */
.page-faq [id^="q-"] {
  scroll-margin-top: 130px;
}

/* ---------- 入场动效 ---------- */
.page-faq [data-reveal] {
  opacity: 1;
}
.page-faq .faq-index__item:focus-visible,
.page-faq .btn:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}

/* ---------- 平板 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-faq .faq-hero h1 br {
    display: inline;
  }
  .page-faq .faq-body {
    grid-template-columns: minmax(200px, 3fr) minmax(0, 9fr);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 150px;
  }
  .page-faq .faq-more {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    clip-path: polygon(0 0, 100% 1.8%, 100% 100%, 0 98.2%);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1080px) {
  .page-faq .faq-index__item {
    font-size: 17px;
  }
  .page-faq .faq-item .disclosure__body {
    padding-left: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__item,
  .page-faq .faq-item summary,
  .page-faq .faq-item summary::after,
  .page-faq .faq-more__contact .copy-btn {
    transition: none;
  }
}
</