.page-faq {
  --faq-accent: var(--lime-400);
  --faq-cut: 14px;
  display: block;
  padding-block: clamp(20px, 3vw, 36px) clamp(56px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 24px;
  margin-top: 20px;
  padding-bottom: clamp(24px, 4vw, 40px);
  border-bottom: var(--line);
}

.page-faq .faq-hero__text h1 {
  margin: 12px 0 16px;
  font-size: clamp(1.7rem, 5.2vw, 2.6rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--mist-100);
}

.page-faq .faq-hero__visual {
  margin: 0;
  position: relative;
  overflow: hidden;
  background: var(--ink-700);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

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

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 52px;
    align-items: end;
  }
}

/* ---------- 快速跳转 chip 带 ---------- */
.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-block: 20px 30px;
}

.page-faq .faq-jump__chip {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 13px;
  border: var(--line);
  border-radius: 2px;
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--silver-400);
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-jump__chip .mono {
  font-family: var(--font-data);
  font-size: 0.7rem;
  color: var(--moss-300);
}

.page-faq .faq-jump__chip:hover,
.page-faq .faq-jump__chip:focus-visible {
  color: var(--ink-900);
  background: var(--lime-400);
  border-color: var(--lime-400);
}

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

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 32px;
}

@media (min-width: 1100px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }
}

/* ---------- 左侧问题目录 ---------- */
.page-faq .faq-index {
  border-top: 1px solid var(--ink-600);
  padding-top: 16px;
}

.page-faq .faq-index__head {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--moss-300);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 16px;
}

.page-faq .faq-index__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 6px 0 6px 12px;
  color: var(--silver-400);
  font-size: var(--fs-14);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-faq .faq-index__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 2px;
  height: 18px;
  background: var(--lime-400);
  transform: translateY(-50%) scaleY(0);
  transform-origin: center;
  transition: transform 0.22s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--mist-100);
}

.page-faq .faq-index__link:hover::before,
.page-faq .faq-index__link:focus-visible::before {
  transform: translateY(-50%) scaleY(1);
}

.page-faq .faq-index__num {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: var(--fs-12);
  color: var(--moss-300);
}

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

@media (min-width: 1100px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--head-h) + 28px);
    border-top: 0;
    border-left: 2px solid var(--ink-600);
    padding: 0 0 0 18px;
    max-height: calc(100vh - var(--head-h) - 60px);
    overflow-y: auto;
  }

  .page-faq .faq-index__list {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}

/* ---------- 答题区 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

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

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 54px);
}

.page-faq .faq-group--entry { --faq-accent: var(--lime-400); }
.page-faq .faq-group--timing { --faq-accent: var(--amber-500); }
.page-faq .faq-group--search { --faq-accent: var(--teal-400); }
.page-faq .faq-group--save { --faq-accent: var(--silver-400); }
.page-faq .faq-group--browser { --faq-accent: var(--lime-400); }
.page-faq .faq-group--help { --faq-accent: var(--amber-500); }

.page-faq .faq-group__head {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: var(--line);
}

.page-faq .faq-group__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 64px;
  height: 2px;
  background: var(--faq-accent);
}

.page-faq .faq-group__idx {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--faq-accent);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--mist-100);
}

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  border-left: 3px solid var(--faq-accent);
  padding-left: 14px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--ink-700);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: var(--fs-12);
  letter-spacing: 0.02em;
  color: var(--moss-300);
}

@media (min-width: 900px) {
  .page-faq .faq-figure img {
    max-width: 560px;
  }
}

/* ---------- 折叠问答条目 ---------- */
.page-faq .faq-item {
  background: var(--ink-700);
  border-left: 4px solid var(--faq-accent);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .faq-item + .faq-item {
  margin-top: 8px;
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-16);
  line-height: 1.55;
  color: var(--mist-100);
  transition: background-color 0.2s var(--ease);
}

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

.page-faq .faq-item__q:hover {
  background: var(--ink-600);
}

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

.page-faq .faq-item__num {
  padding-top: 3px;
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--faq-accent);
}

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

.page-faq .faq-item__arrow {
  align-self: center;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 7px solid var(--faq-accent);
  transition: transform 0.24s var(--ease);
}

.page-faq .faq-item[open] .faq-item__arrow {
  transform: rotate(180deg);
}

.page-faq .faq-item__a {
  padding: 2px 18px 17px 18px;
  max-width: 62ch;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--mist-100);
  opacity: 0.88;
}

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

.page-faq .faq-item__a a {
  color: var(--lime-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-answer-in 0.3s var(--ease) both;
}

@keyframes faq-answer-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 0.88; transform: translateY(0); }
}

/* ---------- 收束组 ---------- */
.page-faq .faq-group--help {
  margin-top: clamp(38px, 6vw, 62px);
  padding: clamp(20px, 3vw, 28px);
  background: linear-gradient(180deg, var(--ink-800) 0%, rgba(11, 32, 26, 0) 100%);
  border-top: 2px solid var(--amber-500);
}

.page-faq .faq-group--help .faq-item {
  background: var(--ink-800);
}

.page-faq .faq-group--help .faq-item__q:hover {
  background: var(--ink-600);
}

/* ---------- 窄屏收尾 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-index__list {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-item__q {
    gap: 10px;
    padding: 14px 14px;
  }

  .page-faq .faq-item__a {
    padding: 2px 14px 16px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    animation: none !important;
    transition: none !important;
  }
}