.page-faq {
  --faq-cut: 12px;
  --faq-gap: clamp(24px, 3.4vw, 44px);
  padding-bottom: clamp(56px, 8vw, 120px);
}

.page-faq .breadcrumb {
  padding-top: clamp(20px, 3vw, 34px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-intro {
  max-width: 880px;
  padding: clamp(32px, 5vw, 64px) 0 clamp(28px, 4vw, 46px);
  border-bottom: 1px solid var(--line);
  position: relative;
}

.page-faq .faq-intro::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: 84px;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  transform: skewX(-12deg);
  transform-origin: right bottom;
}

.page-faq .faq-intro h1 {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(1.85rem, 5.2vw, 3.3rem);
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--white);
}

.page-faq .faq-intro .lede {
  max-width: 640px;
  margin: 0;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-intro-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 26px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-faq .faq-intro-hint {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-intro-hint .num {
  color: var(--cyan);
  font-size: 15px;
  margin-right: 2px;
}

/* ---------- 双栏骨架 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  margin-top: clamp(28px, 4vw, 48px);
}

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

/* ---------- 左侧索引 ---------- */

.page-faq .faq-index {
  min-width: 0;
  padding: 20px 22px 22px;
  background: var(--panel);
  border-left: 2px solid var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

.page-faq .faq-index-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-faq .faq-index-list li {
  flex: 1 1 auto;
}

.page-faq .faq-index-list a {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 8px 10px;
  font-size: 15px;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-index-list a .num {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: color 0.18s var(--ease);
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--white);
  background: rgba(47, 214, 196, 0.08);
  border-bottom-color: var(--cyan);
  outline: none;
}

.page-faq .faq-index-list a:hover .num,
.page-faq .faq-index-list a:focus-visible .num {
  color: var(--cyan);
}

.page-faq .faq-index-foot {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-index-foot p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 分组标题 ---------- */

.page-faq .faq-group {
  scroll-margin-top: 112px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(12px, 2vw, 22px);
}

.page-faq .faq-group-head {
  padding: clamp(28px, 3.6vw, 46px) 0 18px;
}

.page-faq .faq-group:first-child .faq-group-head {
  padding-top: 0;
}

.page-faq .faq-group-head .index-no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq .faq-group-head h2 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(1.35rem, 3vw, 1.95rem);
  line-height: 1.3;
  letter-spacing: 0.05em;
  color: var(--white);
}

.page-faq .faq-group-note {
  margin: 0;
  max-width: 560px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 图片取景框 ---------- */

.page-faq .faq-figure {
  margin: 20px 0 26px;
}

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

/* ---------- 问答列表 ---------- */

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

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

.page-faq .faq-item summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  min-height: 44px;
  padding: 17px 44px 17px 0;
  position: relative;
  cursor: pointer;
  list-style: none;
  color: var(--text);
  transition: color 0.18s var(--ease);
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-item summary::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -5px;
  border-right: 1.5px solid var(--cyan);
  border-bottom: 1.5px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.26s var(--ease);
}

.page-faq .faq-item[open] summary::after {
  transform: rotate(225deg);
}

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  color: var(--white);
  outline: none;
}

.page-faq .faq-item summary:hover .faq-item-no,
.page-faq .faq-item summary:focus-visible .faq-item-no {
  color: var(--cyan);
}

.page-faq .faq-item-no {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: color 0.18s var(--ease);
}

.page-faq .faq-item-q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(15px, 1.4vw, 16.5px);
  line-height: 1.65;
  letter-spacing: 0.01em;
}

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

.page-faq .faq-item-body {
  padding: 0 0 22px 30px;
  animation: faq-drop 0.28s var(--ease);
}

.page-faq .faq-item-body p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text);
}

.page-faq .faq-item-body p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 214, 196, 0.4);
  transition: border-color 0.18s var(--ease);
}

.page-faq .faq-item-body a:hover,
.page-faq .faq-item-body a:focus-visible {
  border-bottom-color: var(--cyan);
  outline: none;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 14px 0 0;
  padding: 0 0 0 16px;
  border-left: 1px solid var(--line);
}

.page-faq .faq-steps li {
  position: relative;
  padding: 7px 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .faq-steps li .num {
  display: inline-block;
  margin-right: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-steps li::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 16px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
}

@keyframes faq-drop {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 联系卡片 ---------- */

.page-faq .faq-contact-card {
  margin-top: 26px;
  padding: 24px 22px 26px;
  background: var(--panel);
  border-top: 2px solid var(--cyan);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  display: grid;
  gap: 4px;
}

.page-faq .faq-contact-label {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .faq-contact-label:first-child {
  margin-top: 0;
}

.page-faq .faq-contact-val {
  margin: 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-contact-note {
  margin: 16px 0 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-contact-card .btn {
  justify-self: start;
  min-height: 44px;
}

/* ---------- 主题色点缀 ---------- */

.page-faq .faq-group--contact .faq-group-head .index-no {
  color: var(--violet);
}

.page-faq .faq-group--contact .faq-item[open] summary::after {
  border-color: var(--violet);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-item-body {
    padding-left: 44px;
    max-width: 68ch;
  }

  .page-faq .faq-index-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px 18px;
  }

  .page-faq .faq-contact-card {
    grid-template-columns: max-content minmax(0, 1fr);
    column-gap: 28px;
    align-items: baseline;
    padding: 28px 30px 30px;
  }

  .page-faq .faq-contact-note,
  .page-faq .faq-contact-card .btn {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 74px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 104px;
    max-height: calc(100vh - 140px);
    overflow: auto;
  }

  .page-faq .faq-index-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .page-faq .faq-index-list a {
    border-bottom: 1px solid var(--line);
    padding: 10px 4px;
  }

  .page-faq .faq-index-list li:last-child a {
    border-bottom: none;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-layout {
    grid-template-columns: 258px minmax(0, 1fr);
  }
}

@media (max-width: 480px) {
  .page-faq .faq-item summary {
    padding-right: 36px;
    gap: 10px;
  }

  .page-faq .faq-item-body {
    padding-left: 0;
  }

  .page-faq .faq-index {
    padding: 18px 16px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item-body {
    animation: none;
  }

  .page-faq .faq-item summary,
  .page-faq .faq-item summary::after,
  .page-faq .faq-index-list a {
    transition: none;
  }
}
<<<END>>>