.page-faq {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
  overflow-x: hidden;
}

.page-faq a {
  color: inherit;
  text-decoration: none;
}

/* ===== 首屏区块 ===== */
.page-faq .faq-hero {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: calc(var(--header-h) + var(--space-2xl)) var(--space-lg) var(--space-2xl);
}

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

.page-faq .breadcrumb a {
  color: var(--color-text-muted);
}

.page-faq .breadcrumb a:hover {
  color: var(--color-accent-green);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: var(--space-xl);
  align-items: start;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  line-height: 1.1;
  margin: 0 0 var(--space-lg);
  letter-spacing: -0.02em;
}

.page-faq .faq-hero-lead {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-on-dark);
  margin: 0 0 var(--space-xl);
  max-width: 640px;
}

.page-faq .faq-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

.page-faq .faq-keywords-label {
  display: block;
  width: 100%;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.page-faq .faq-keywords a {
  border: 1px solid rgba(245, 247, 250, 0.28);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-keywords a:hover {
  background: var(--color-accent-green);
  border-color: var(--color-accent-green);
  color: var(--color-primary);
}

/* ===== 服务状态速览 ===== */
.page-faq .faq-status-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(245, 247, 250, 0.1);
  border-radius: var(--radius);
  padding: var(--space-lg);
}

.page-faq .faq-status-title {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--color-accent-orange);
  margin-bottom: var(--space-sm);
}

.page-faq .faq-status-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid rgba(245, 247, 250, 0.08);
}

.page-faq .faq-status-row:last-child {
  border-bottom: none;
}

.page-faq .faq-status-row dt {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.page-faq .faq-status-row dd {
  margin: 0;
  font-family: var(--font-mono);
  color: var(--color-accent-green);
  font-size: 0.95rem;
}

/* ===== 通用分区 ===== */
.page-faq .faq-section {
  padding: var(--space-2xl) var(--space-lg);
}

.page-faq .faq-inner {
  max-width: var(--container-max);
  margin: 0 auto;
}

.page-faq .faq-section-head {
  max-width: 720px;
  margin-bottom: var(--space-2xl);
}

.page-faq .faq-section-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 2.8rem;
  line-height: 1;
  color: var(--color-accent-green);
  margin-bottom: var(--space-sm);
}

.page-faq .faq-section-head h2 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  line-height: 1.15;
  margin: 0 0 var(--space-sm);
}

.page-faq .faq-section-head p {
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===== 浅色分区 ===== */
.page-faq .faq-section-light {
  background: var(--color-bg-light);
  color: var(--color-text-on-light);
}

.page-faq .faq-section-light .faq-section-num {
  color: var(--color-accent-purple);
}

.page-faq .faq-section-light .faq-section-head h2 {
  color: var(--color-text-on-light);
}

.page-faq .faq-section-light .faq-section-head p {
  color: #57677a;
}

.page-faq .faq-section-light .faq-figure figcaption {
  color: #57677a;
}

/* ===== 手风琴 ===== */
.page-faq .faq-accordion {
  background: var(--color-bg-light);
  color: var(--color-text-on-light);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-accordion details {
  border-bottom: 1px solid rgba(10, 27, 46, 0.1);
}

.page-faq .faq-accordion details:last-child {
  border-bottom: none;
}

.page-faq .faq-accordion summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  font-family: var(--font-heading);
  font-size: 1rem;
  line-height: 1.4;
  transition: background 0.2s ease;
}

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

.page-faq .faq-accordion summary:hover {
  background: rgba(10, 27, 46, 0.05);
}

.page-faq .faq-accordion summary::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  line-height: 1;
  color: var(--color-accent-green);
  transition: transform 0.25s ease;
}

.page-faq .faq-accordion details[open] summary::after {
  transform: rotate(45deg);
}

.page-faq .faq-answer {
  padding: 0 var(--space-lg) var(--space-lg);
  font-size: 0.95rem;
  line-height: 1.75;
}

.page-faq .faq-answer p:first-child {
  margin-top: 0;
}

.page-faq .faq-answer ol,
.page-faq .faq-answer ul {
  margin: 0 0 var(--space-md);
  padding-left: 1.25rem;
}

.page-faq .faq-answer li {
  margin-bottom: 0.5rem;
}

.page-faq .faq-answer code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: rgba(10, 27, 46, 0.08);
  border-radius: 4px;
  padding: 0.15rem 0.35rem;
}

.page-faq .faq-answer a {
  color: var(--color-accent-purple);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-faq .faq-accordion details[open] .faq-answer {
  animation: faqFade 0.3s ease-out;
}

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

/* ===== 深色手风琴变体 ===== */
.page-faq .faq-section-light .faq-accordion {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.page-faq .faq-section-light .faq-accordion details {
  border-bottom: 1px solid rgba(245, 247, 250, 0.12);
}

.page-faq .faq-section-light .faq-accordion summary:hover {
  background: rgba(245, 247, 250, 0.08);
}

.page-faq .faq-section-light .faq-answer code {
  background: rgba(245, 247, 250, 0.14);
  color: var(--color-text-on-dark);
}

.page-faq .faq-section-light .faq-answer a {
  color: var(--color-accent-green);
}

/* ===== 错误原因列表 ===== */
.page-faq .faq-cause-list {
  list-style: none;
  padding-left: 0;
}

.page-faq .faq-cause-list li {
  position: relative;
  padding-left: 1.5rem;
}

.page-faq .faq-cause-list li::before {
  content: "!";
  position: absolute;
  left: 0;
  top: 0.15rem;
  width: 1.1rem;
  height: 1.1rem;
  background: var(--color-danger);
  color: var(--color-text-on-dark);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.1rem;
  text-align: center;
  border-radius: 50%;
}

/* ===== 图文交错布局 ===== */
.page-faq .faq-row {
  display: grid;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.page-faq .faq-row:last-child {
  margin-bottom: 0;
}

.page-faq .faq-row-reverse .faq-figure {
  order: 2;
}

.page-faq .faq-figure {
  margin: 0;
}

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

.page-faq .faq-figure figcaption {
  margin-top: var(--space-sm);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* ===== 功能使用布局 ===== */
.page-faq .faq-layout-usage {
  display: grid;
  gap: var(--space-xl);
  align-items: start;
}

.page-faq .faq-panel {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
  border-radius: var(--radius);
  padding: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.page-faq .faq-panel::after {
  content: "";
  position: absolute;
  width: 170px;
  height: 170px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(122, 0, 255, 0.55), transparent 70%);
  right: -45px;
  bottom: -45px;
  pointer-events: none;
}

.page-faq .faq-panel-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--color-accent-orange);
  margin: 0 0 var(--space-sm);
}

.page-faq .faq-panel-version {
  margin: 0 0 var(--space-lg);
  font-family: var(--font-mono);
  font-size: 4rem;
  line-height: 1;
  color: var(--color-accent-green);
}

.page-faq .faq-panel-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-xl);
}

.page-faq .faq-panel-list li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.7rem;
  font-size: 0.9rem;
  color: var(--color-text-on-dark);
}

.page-faq .faq-panel-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--color-accent-orange);
}

.page-faq .faq-panel .btn {
  box-sizing: border-box;
  width: 100%;
  text-align: center;
}

/* ===== 数据卡片 ===== */
.page-faq .faq-card-grid {
  display: grid;
  gap: var(--space-lg);
}

.page-faq .faq-data-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(245, 247, 250, 0.12);
  border-radius: var(--radius);
  padding: var(--space-xl);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-data-card:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 255, 157, 0.45);
}

.page-faq .faq-card-code {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--color-accent-purple);
  margin-bottom: var(--space-sm);
}

.page-faq .faq-data-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  margin: 0 0 var(--space-md);
}

.page-faq .faq-data-card p {
  margin: 0;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* ===== 版本演进列表 ===== */
.page-faq .faq-version-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-faq .faq-version-list li {
  display: flex;
  justify-content: space-between;
  gap: var(--space-md);
  padding: 0.45rem 0;
  border-bottom: 1px dashed rgba(245, 247, 250, 0.12);
  font-size: 0.9rem;
}

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

.page-faq .faq-version-list span {
  font-family: var(--font-mono);
  color: var(--color-accent-green);
}

/* ===== 窄列区块 ===== */
.page-faq .faq-narrow {
  max-width: 760px;
  margin: 0 auto;
}

/* ===== 桌面端布局 ===== */
@media (min-width: 768px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: 1.25fr 0.75fr;
  }

  .page-faq .faq-hero h1 {
    font-size: 3rem;
  }

  .page-faq .faq-hero-lead {
    font-size: 1.1rem;
  }

  .page-faq .faq-section-head h2 {
    font-size: 2.25rem;
  }

  .page-faq .faq-row {
    grid-template-columns: 0.95fr 1.05fr;
    align-items: center;
    gap: var(--space-2xl);
  }

  .page-faq .faq-row-reverse {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-faq .faq-layout-usage {
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-2xl);
  }

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