.page-faq {
  background: linear-gradient(180deg, var(--gray-light) 0%, var(--white) 100%);
  padding-bottom: 3rem;
}

.page-faq .breadcrumb {
  padding-top: 1.25rem;
}

/* 首屏介绍区 */
.page-faq .faq-intro {
  position: relative;
  background: linear-gradient(135deg, var(--green) 0%, var(--green-deep) 100%);
  color: var(--white);
  border: var(--border-w) solid var(--gray-dark);
  box-shadow: var(--shadow);
  padding: 2rem 1.5rem;
  margin: 1.25rem 0 2.5rem;
  overflow: hidden;
}

.page-faq .faq-intro::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    -45deg,
    rgba(255, 255, 255, 0.06) 0px,
    rgba(255, 255, 255, 0.06) 2px,
    transparent 2px,
    transparent 8px
  );
  pointer-events: none;
}

.page-faq .faq-intro::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 8px;
  background: repeating-linear-gradient(
    -45deg,
    var(--white) 0px,
    var(--white) 10px,
    var(--red) 10px,
    var(--red) 20px
  );
  border-top: 2px solid var(--gray-dark);
}

.page-faq .faq-intro-top {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.page-faq .faq-eyebrow {
  margin: 0;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: 1px solid rgba(255, 255, 255, 0.6);
  padding: 0.3rem 0.75rem;
  background: var(--red);
  color: var(--white);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.25);
}

.page-faq .faq-intro-index {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--white);
  background: var(--gray-dark);
  border: 2px solid var(--white);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.35);
  padding: 0.2rem 0.9rem;
  letter-spacing: 0.05em;
}

.page-faq .faq-intro h1 {
  position: relative;
  margin: 0;
  font-size: 2.1rem;
  font-weight: 900;
  font-family: var(--font-head);
  line-height: 1.15;
  max-width: 18em;
}

.page-faq .faq-h1-sub {
  display: block;
  font-size: 0.58em;
  font-weight: 700;
  margin-top: 0.85rem;
  padding-left: 0.85rem;
  border-left: 4px solid var(--red);
  color: rgba(255, 255, 255, 0.95);
  line-height: 1.4;
}

.page-faq .faq-lead {
  position: relative;
  max-width: 36em;
  margin: 1.25rem 0 0;
  font-size: 1rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.95);
}

/* 双栏布局 */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 2.5rem;
  }

  .page-faq .faq-index {
    flex: 0 0 280px;
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-content {
    flex: 1 1 auto;
    min-width: 0;
  }
}

/* 索引 */
.page-faq .faq-index {
  background: var(--white);
  border: var(--border-w) solid var(--gray-dark);
  box-shadow: var(--shadow-solid);
  padding: 1.5rem 1.25rem;
}

.page-faq .faq-index-title {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 900;
  margin: 0 0 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 3px solid var(--gray-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.page-faq .faq-index-title::after {
  content: "索引";
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--red);
  border: 1px solid var(--red);
  padding: 0.1rem 0.4rem;
  letter-spacing: 0.1em;
}

.page-faq .skill-tree {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 3px solid var(--green-light);
}

.page-faq .skill-tree-step {
  display: flex;
  align-items: center;
  border-bottom: 1px solid #dddddd;
}

.page-faq .skill-tree-step:last-child {
  border-bottom: none;
}

.page-faq .skill-tree-step[data-step]::before {
  content: attr(data-step);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--green);
  display: inline-block;
  min-width: 2.4rem;
  text-align: center;
  flex-shrink: 0;
}

.page-faq .skill-tree-step a {
  flex: 1 1 auto;
  padding: 0.9rem 0.5rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--gray-dark);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.page-faq .skill-tree-step a:hover {
  border-left-color: var(--red);
  background: var(--gray-light);
  color: var(--red-deep);
}

.page-faq .faq-index-stat {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 3px solid var(--gray-dark);
}

.page-faq .faq-index-stat-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--red);
  margin: 0;
  line-height: 1.1;
}

.page-faq .faq-index-stat-label {
  margin: 0.3rem 0 0;
  font-size: 0.8rem;
  color: var(--gray-mid);
}

/* 内容区块 */
.page-faq .faq-section {
  margin-bottom: 3rem;
  scroll-margin-top: 100px;
}

.page-faq .faq-section-head {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  border-bottom: var(--border-w) solid var(--gray-dark);
  padding-bottom: 0.65rem;
}

.page-faq .faq-section-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--white);
  background: var(--green);
  border: 2px solid var(--gray-dark);
  box-shadow: 3px 3px 0 var(--gray-dark);
  padding: 0.1rem 0.65rem;
  line-height: 1.4;
}

.page-faq .faq-section-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: 0.03em;
}

/* FAQ 折叠项 */
.page-faq .faq-item {
  border: var(--border-w) solid var(--gray-dark);
  box-shadow: var(--shadow-solid);
  background: var(--white);
  margin-bottom: 1.25rem;
  transition: border-color 0.2s ease, background 0.3s ease, box-shadow 0.2s ease;
}

.page-faq .faq-item:hover {
  border-color: var(--red);
  box-shadow: 4px 4px 0 var(--red-deep);
}

.page-faq .faq-item[open] {
  background: linear-gradient(135deg, var(--green-light) 0%, var(--white) 70%);
  border-color: var(--gray-dark);
}

.page-faq .faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1.25rem 1.5rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--gray-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  flex: 0 0 1.5rem;
  width: 1.5rem;
  height: 1.5rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.35rem;
  color: var(--green);
  border: 2px solid var(--green);
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  background: var(--green);
  color: var(--white);
  border-color: var(--green);
  transform: rotate(90deg);
}

.page-faq .faq-answer {
  padding: 0.25rem 1.5rem 1.25rem;
  color: var(--gray-dark);
  line-height: 1.65;
  font-size: 0.95rem;
  border-top: 2px solid transparent;
}

.page-faq .faq-item[open] .faq-answer {
  border-top-color: var(--green-light);
}

.page-faq .faq-answer p {
  margin-top: 0.85rem;
}

/* 图片 */
.page-faq .faq-search-screenshot {
  margin: 1.5rem 0;
  border: var(--border-w) solid var(--gray-dark);
  box-shadow: var(--shadow-solid);
  background: var(--white);
}

.page-faq .faq-search-screenshot img {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-live-mockup {
  max-width: 280px;
  margin: 1.5rem 0;
  border: var(--border-w) solid var(--gray-dark);
  box-shadow: var(--shadow-solid);
  background: var(--gray-dark);
  padding: 0.5rem;
}

.page-faq .faq-live-mockup img {
  display: block;
  width: 100%;
  height: auto;
}

/* 联系面板 */
.page-faq .faq-contact-panel {
  background: var(--white);
  border: var(--border-w) solid var(--gray-dark);
  box-shadow: var(--shadow-solid);
  padding: 1.75rem 1.5rem;
}

.page-faq .faq-contact-desc {
  margin: 0 0 1.25rem;
  color: var(--gray-mid);
  line-height: 1.6;
}

.page-faq .faq-contact-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .page-faq .faq-contact-grid {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
  }
}

.page-faq .faq-contact-info {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-contact-title {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 900;
  margin: 0 0 0.75rem;
  color: var(--gray-dark);
}

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

.page-faq .faq-contact-list li {
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--gray-mid);
  font-size: 0.95rem;
  color: var(--gray-dark);
}

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

.page-faq .faq-contact-action {
  flex-shrink: 0;
}

.page-faq .faq-contact-tip {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--gray-mid);
}

/* 其他问题 */
.page-faq .faq-more {
  margin-top: 2.5rem;
  padding: 1.5rem;
  border: var(--border-w) solid var(--gray-dark);
  background: var(--gray-dark);
  color: var(--white);
  box-shadow: var(--shadow-solid);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}

@media (min-width: 768px) {
  .page-faq .faq-more {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.page-faq .faq-more-text {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 900;
}

.page-faq .faq-more-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}