.page-faq {
  --faq-line: rgba(11, 42, 69, 0.12);
  --faq-gap: clamp(16px, 2.4vw, 28px);
  background: var(--mist);
  color: var(--ink);
}

/* 面包屑 */
.page-faq .faq-crumb {
  padding: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
}
.page-faq .faq-crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-crumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--copper);
}
.page-faq .faq-crumb a {
  color: var(--blue);
  text-decoration: none;
}
.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  color: var(--ink);
  text-decoration: underline;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.5vw, 52px) 0 clamp(24px, 3.6vw, 40px);
  background:
    linear-gradient(180deg, rgba(11, 42, 69, 0.07), rgba(237, 239, 242, 0) 72%),
    repeating-linear-gradient(90deg, rgba(11, 42, 69, 0.045) 0 1px, transparent 1px 96px);
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -140px;
  top: -110px;
  width: 380px;
  height: 380px;
  border-radius: 46% 54% 62% 38% / 52% 44% 56% 48%;
  background: radial-gradient(circle at 32% 32%, rgba(31, 109, 163, 0.18), rgba(11, 42, 69, 0.04) 66%);
  pointer-events: none;
}
.page-faq .faq-hero > .container {
  position: relative;
  z-index: 1;
}
.page-faq .faq-h1 {
  margin: 12px 0 0;
  max-width: 22ch;
  font-size: clamp(29px, 6vw, 52px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.page-faq .faq-lead {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.92;
  color: var(--ink-2);
}

/* 主题索引带 */
.page-faq .topic-index {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 78%;
  gap: 10px;
  margin-top: clamp(24px, 3.6vw, 38px);
  padding-bottom: 10px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.page-faq .topic-link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 2px 10px;
  padding: 12px 14px;
  scroll-snap-align: start;
  background: var(--paper);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-s);
  text-decoration: none;
  color: var(--ink);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.page-faq .topic-link:hover,
.page-faq .topic-link:focus-visible {
  border-color: var(--copper);
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
}
.page-faq .topic-num {
  grid-row: span 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--jade);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--jade);
}
.page-faq .topic-link:hover .topic-num,
.page-faq .topic-link:focus-visible .topic-num {
  border-color: var(--copper);
  color: var(--clay);
}
.page-faq .topic-name {
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.4;
}
.page-faq .topic-sub {
  grid-column: 2;
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--stone);
}

/* 主布局 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  padding: clamp(22px, 3.6vw, 44px) 0 clamp(38px, 6vw, 72px);
}
.page-faq .faq-main {
  min-width: 0;
}
.page-faq .faq-aside {
  display: none;
}

/* 分组 */
.page-faq .faq-group {
  scroll-margin-top: 24px;
}
.page-faq .faq-group + .faq-group {
  margin-top: clamp(30px, 4.4vw, 54px);
}
.page-faq .group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--line-copper);
}
.page-faq .group-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 27px);
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--jade);
}
.page-faq .group-title {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 22px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink);
}
.page-faq .group-desc {
  margin: 12px 0 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--stone);
}

/* 分组配图 */
.page-faq .group-figure {
  margin: 0 0 18px;
  padding: 12px;
  background: var(--paper);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-m);
}
.page-faq .group-figure .media {
  border-radius: var(--radius-s);
  overflow: hidden;
}
.page-faq .group-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-faq .group-figure .media-caption {
  margin-top: 10px;
  font-family: var(--font-kai);
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--stone);
}

/* 问答卡片 */
.page-faq .qa-list {
  display: grid;
  gap: 12px;
}
.page-faq .qa {
  background: var(--paper);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-m);
  overflow: hidden;
  transition: border-color 0.22s ease, box-shadow 0.22s ease;
}
.page-faq .qa[open] {
  border-color: var(--line-copper);
  box-shadow: var(--shadow-soft);
}
.page-faq .qa-q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  margin: 0;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.66;
  color: var(--ink);
  transition: color 0.2s ease;
}
.page-faq .qa-q::-webkit-details-marker {
  display: none;
}
.page-faq .qa-q:hover {
  color: var(--blue);
}
.page-faq .qa-q:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: -3px;
}
.page-faq .qa-index {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--jade);
}
.page-faq .qa-text {
  flex: 1 1 auto;
  min-width: 0;
}
.page-faq .qa-mark {
  flex: none;
  position: relative;
  align-self: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line-copper);
  border-radius: 6px;
  transition: background-color 0.2s ease;
}
.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--copper);
  transform: translate(-50%, -50%);
}
.page-faq .qa-mark::before {
  width: 10px;
  height: 1.5px;
}
.page-faq .qa-mark::after {
  width: 1.5px;
  height: 10px;
  transition: opacity 0.2s ease;
}
.page-faq .qa[open] .qa-mark {
  background: rgba(201, 136, 76, 0.16);
}
.page-faq .qa[open] .qa-mark::after {
  opacity: 0;
}
.page-faq .qa-a {
  padding: 0 16px 18px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--ink-2);
}
.page-faq .qa-a p {
  margin: 0 0 10px;
}
.page-faq .qa-a p:last-child {
  margin-bottom: 0;
}
.page-faq .qa-a a {
  color: var(--blue);
  text-underline-offset: 3px;
}
.page-faq .qa-a a:hover {
  color: var(--clay);
}
.page-faq .qa-note {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--copper);
  font-family: var(--font-kai);
  font-size: 14px;
  line-height: 2;
  color: var(--stone);
}
.page-faq .qa-a .tag {
  display: inline-block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* 文末联系条 */
.page-faq .faq-cta {
  margin-top: clamp(32px, 4.6vw, 56px);
  padding: clamp(24px, 3.6vw, 40px);
  border-radius: var(--radius-l);
  background:
    radial-gradient(circle at 88% 12%, rgba(52, 199, 160, 0.18), rgba(11, 42, 69, 0) 58%),
    var(--ink);
  color: var(--mist);
}
.page-faq .cta-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--copper-soft);
}
.page-faq .cta-title {
  margin: 10px 0 0;
  font-size: clamp(20px, 2.8vw, 27px);
  font-weight: 700;
  line-height: 1.38;
  color: var(--paper);
}
.page-faq .cta-text {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(237, 239, 242, 0.82);
}
.page-faq .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.page-faq .cta-ghost {
  border-color: rgba(231, 188, 133, 0.55);
  color: var(--copper-soft);
  background: transparent;
}
.page-faq .cta-ghost:hover,
.page-faq .cta-ghost:focus-visible {
  border-color: var(--copper-soft);
  color: var(--paper);
  background: rgba(231, 188, 133, 0.12);
}
.page-faq .cta-links {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(201, 136, 76, 0.32);
  font-size: 13.5px;
  line-height: 1.9;
  color: rgba(237, 239, 242, 0.72);
}
.page-faq .cta-links a {
  color: var(--copper-soft);
  text-underline-offset: 3px;
}
.page-faq .cta-links a:hover {
  color: var(--paper);
}

/* 平板与桌面 */
@media (min-width: 640px) {
  .page-faq .topic-index {
    grid-auto-flow: row;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-auto-columns: auto;
    overflow-x: visible;
    scroll-snap-type: none;
    padding-bottom: 0;
  }
  .page-faq .group-figure--narrow {
    max-width: 420px;
  }
}

@media (min-width: 900px) {
  .page-faq .topic-index {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .qa-q {
    font-size: 16.5px;
    padding: 17px 20px;
  }
  .page-faq .qa-a {
    padding: 0 20px 20px;
  }
  .page-faq .cta-actions {
    margin-top: 24px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    align-items: start;
    gap: clamp(36px, 4vw, 60px);
  }
  .page-faq .faq-aside {
    display: block;
    position: sticky;
    top: 24px;
    padding-top: 4px;
  }
  .page-faq .aside-title {
    margin: 0 0 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--stone);
  }
  .page-faq .aside-list {
    display: grid;
    gap: 2px;
    margin: 0;
    padding: 0;
    list-style: none;
    border-left: 1px solid var(--faq-line);
  }
  .page-faq .aside-list a {
    display: flex;
    align-items: baseline;
    gap: 9px;
    padding: 9px 10px 9px 12px;
    border-left: 2px solid transparent;
    margin-left: -1px;
    font-size: 13.5px;
    line-height: 1.5;
    color: var(--ink-2);
    text-decoration: none;
    transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
  }
  .page-faq .aside-list a:hover,
  .page-faq .aside-list a:focus-visible {
    border-left-color: var(--copper);
    color: var(--ink);
    background: rgba(247, 244, 238, 0.9);
  }
  .page-faq .aside-num {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    color: var(--jade);
  }
  .page-faq .faq-cta {
    padding: clamp(32px, 3vw, 46px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .topic-link,
  .page-faq .qa,
  .page-faq .qa-mark,
  .page-faq .qa-mark::after {
    transition: none;
  }
  .page-faq .topic-link:hover,
  .page-faq .topic-link:focus-visible {
    transform: none;
  }
}