.page-faq {
  background: var(--ink-800);
  color: var(--paper-050);
}

/* ---------- 顶部氛围带 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  border-bottom: 1px solid var(--moss-600);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.32;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 23, 19, 0.4) 0%, rgba(8, 23, 19, 0.94) 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: clamp(28px, 5vw, 44px);
  padding-bottom: clamp(48px, 8vw, 84px);
}

.page-faq .breadcrumb {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--fog-400);
}

.page-faq .breadcrumb a {
  color: var(--fog-200);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 180ms var(--ease-out), color 180ms var(--ease-out);
}

.page-faq .breadcrumb a:hover {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.page-faq .faq-hero__kicker {
  margin: clamp(24px, 5vw, 44px) 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 5.2vw, 56px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper-050);
  max-width: 18em;
}

.page-faq .faq-hero__deck {
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--fog-200);
  max-width: 34em;
}

/* ---------- 米白主体区，顶部 40px 斜切 ---------- */
.page-faq .faq-sheet {
  background: var(--paper-050);
  color: var(--ink-800);
  clip-path: polygon(0 40px, 100% 0, 100% 100%, 0 100%);
  padding-top: calc(40px + clamp(32px, 6vw, 64px));
  padding-bottom: clamp(48px, 8vw, 88px);
}

.page-faq .faq-layout {
  display: grid;
  gap: 32px;
}

/* ---------- 左侧分组索引 ---------- */
.page-faq .faq-index {
  display: none;
}

.page-faq .faq-index__head {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stone-300);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0 10px 14px;
  border-left: 1px solid var(--stone-300);
  font-size: 14px;
  line-height: 1.4;
  color: var(--moss-600);
  text-decoration: none;
  transition: color 180ms var(--ease-out), border-color 180ms var(--ease-out), background-color 180ms var(--ease-out);
}

.page-faq .faq-index__dot {
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--stone-300);
  transition: background-color 180ms var(--ease-out);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan-600);
  border-left-color: var(--cyan-600);
  background: rgba(18, 169, 140, 0.06);
}

.page-faq .faq-index__link:hover .faq-index__dot,
.page-faq .faq-index__link:focus-visible .faq-index__dot {
  background: var(--cyan-600);
}

.page-faq .faq-index__foot {
  margin: 20px 0 0;
  padding-left: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fog-400);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 7vw, 68px);
}

.page-faq .faq-group__head {
  position: sticky;
  top: var(--header-h);
  z-index: 2;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 0 12px 14px;
  margin-bottom: 6px;
  background: var(--paper-050);
  border-left: 2px solid var(--cyan-600);
}

.page-faq .faq-group__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan-600);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 3vw, 24px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink-800);
}

.page-faq .faq-group__count {
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--fog-400);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--stone-300);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--moss-600);
  transition: color 180ms var(--ease-out);
}

.page-faq .faq-dash {
  flex: none;
  align-self: center;
  width: 14px;
  height: 1px;
  background: var(--stone-300);
}

.page-faq .faq-q {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink-800);
  transition: color 180ms var(--ease-out);
}

.page-faq .faq-mark {
  flex: none;
  align-self: center;
  position: relative;
  width: 12px;
  height: 12px;
  margin-left: auto;
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 12px;
  height: 1px;
  background: var(--moss-600);
}

.page-faq .faq-mark::after {
  transform: rotate(90deg);
  transition: transform 180ms var(--ease-out);
}

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

.page-faq .faq-item[open] .faq-q {
  color: var(--cyan-600);
}

.page-faq .faq-item[open] .faq-num {
  color: var(--cyan-600);
}

.page-faq .faq-item summary:hover .faq-q {
  color: var(--cyan-600);
}

.page-faq .faq-a {
  margin: 0 0 20px;
  padding-left: 16px;
  border-left: 1px solid var(--stone-300);
  max-width: 33em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--moss-600);
}

/* ---------- 图注 ---------- */
.page-faq .faq-figure {
  margin: 18px 0 26px;
  max-width: 240px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--stone-300);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fog-400);
}

/* ---------- 支持区 ---------- */
.page-faq .faq-support {
  margin-top: clamp(48px, 7vw, 76px);
  padding: clamp(26px, 5vw, 44px);
  background: var(--moss-700);
  border-left: 2px solid var(--cyan-400);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-support__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-faq .faq-support__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.6vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper-050);
}

.page-faq .faq-support__text {
  margin: 16px 0 0;
  max-width: 33em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--fog-200);
}

.page-faq .faq-contact {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.page-faq .faq-contact__item {
  padding-top: 14px;
  border-top: 1px solid var(--moss-600);
}

.page-faq .faq-contact__label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog-400);
}

.page-faq .faq-contact__value {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--cyan-400);
  text-decoration: none;
  word-break: break-all;
  border-bottom: 1px solid transparent;
  transition: border-color 180ms var(--ease-out);
}

.page-faq .faq-contact__value:hover {
  border-bottom-color: var(--cyan-400);
}

.page-faq .faq-contact__value--plain {
  color: var(--paper-050);
  font-family: var(--font-body);
  font-weight: 400;
  word-break: normal;
}

.page-faq .faq-support__foot {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--moss-600);
  font-size: 14px;
  line-height: 1.8;
  color: var(--fog-200);
  max-width: 34em;
}

.page-faq .faq-support .text-link {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-index__foot .text-link {
  color: var(--cyan-600);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-a .text-link {
  color: var(--cyan-600);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 进入视口 ---------- */
.js .page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 280ms var(--ease-out), transform 280ms var(--ease-out);
}

.js .page-faq [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 窄屏优先的响应式 ---------- */
@media (max-width: 599px) {
  .page-faq .faq-q {
    font-size: 16px;
  }

  .page-faq .faq-item summary {
    gap: 8px;
    padding: 16px 0;
  }

  .page-faq .faq-dash {
    width: 10px;
  }

  .page-faq .faq-a {
    padding-left: 12px;
    font-size: 15px;
  }

  .page-faq .faq-figure {
    max-width: 100%;
  }
}

@media (min-width: 640px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 224px minmax(0, 1fr);
    gap: 56px;
  }

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

  .page-faq .faq-index__inner {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-q {
    font-size: 18px;
  }

  .page-faq .faq-a {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .js .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-faq .faq-mark::after,
  .page-faq .faq-q,
  .page-faq .faq-num,
  .page-faq .faq-index__link {
    transition: none;
  }
}