/* ===== 常见问答页面专属样式 ===== */
.page-faq {
  background:
    radial-gradient(ellipse at 90% 0%, rgba(57,255,136,0.05) 0%, transparent 45%),
    radial-gradient(ellipse at 0% 35%, rgba(255,107,53,0.04) 0%, transparent 35%),
    var(--c-bg);
  color: var(--c-white);
  line-height: 1.7;
}

.page-faq [id] {
  scroll-margin-top: calc(var(--header-h) + 40px);
}

.page-faq [data-reveal] {
  opacity: 1;
  transform: none;
}

.page-faq [data-reveal].is-revealed {
  animation: faq-rise 0.5s var(--ease) both;
}

@keyframes faq-rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ===== Hero 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  padding: 100px 0 48px;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.page-faq .faq-hero .container {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumb {
  margin-bottom: 36px;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-faq .faq-hero__content h1 {
  font-family: var(--font-headline);
  font-size: clamp(40px, 8vw, 56px);
  line-height: 0.95;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  margin: 14px 0 22px;
  color: var(--c-white);
}

.page-faq .faq-hero__accent {
  display: block;
  color: var(--c-accent);
  font-size: 0.6em;
  margin-top: 10px;
  letter-spacing: 0.06em;
}

.page-faq .faq-hero__lead {
  color: var(--c-gray);
  font-size: 16px;
  max-width: 520px;
  margin-bottom: 24px;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-hero__media {
  position: relative;
}

.page-faq .faq-hero__media img {
  width: 100%;
  height: auto;
  background: var(--c-panel);
  border: 1px solid var(--c-border);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}

.page-faq .faq-hero__media::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 12px;
  right: -12px;
  bottom: -12px;
  border: 1px solid rgba(57,255,136,0.25);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
  z-index: -1;
}

/* ===== 主区域 ===== */
.page-faq .faq-main {
  padding: 48px 0 72px;
}

.page-faq .faq-main__grid {
  display: grid;
  gap: 36px;
  align-items: start;
}

/* ===== 目录 ===== */
.page-faq .faq-index {
  border: 1px solid var(--c-border);
  background: linear-gradient(180deg, rgba(17,24,39,0.9), rgba(10,14,23,0.9));
  padding: 22px 22px 24px;
}

.page-faq .faq-index__tip {
  font-size: 13px;
  color: var(--c-gray);
  border: 1px dashed rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.02);
  padding: 10px 12px;
  margin-bottom: 22px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  counter-reset: faq-index;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__list li {
  counter-increment: faq-index;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 14px;
  color: var(--c-gray);
  text-decoration: none;
  border-left: 3px solid var(--c-border);
  transition: color var(--transition), border-color var(--transition), background-color var(--transition);
}

.page-faq .faq-index__list a::before {
  content: counter(faq-index, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-accent);
  opacity: 0.7;
}

.page-faq .faq-index__list a:hover {
  color: var(--c-white);
  border-left-color: var(--c-accent);
  background: rgba(57,255,136,0.06);
}

.page-faq .faq-index__note {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--c-border);
}

.page-faq .faq-index__note p {
  color: var(--c-gray);
  font-size: 14px;
  margin-bottom: 14px;
}

.page-faq .faq-index__note p a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ===== 手风琴分组 ===== */
.page-faq .faq-group {
  margin-bottom: 52px;
}

.page-faq .faq-group:target {
  padding-left: 16px;
  border-left: 3px solid var(--c-accent);
  transition: padding-left var(--transition), border-left-color var(--transition);
}

.page-faq .faq-group__title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-headline);
  font-size: 32px;
  line-height: 1.1;
  letter-spacing: 0.02em;
  margin: 0 0 22px;
  padding-bottom: 14px;
  border-bottom: 2px solid rgba(255,255,255,0.1);
  color: var(--c-white);
}

.page-faq .faq-group__icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  padding: 7px;
  color: var(--c-accent);
  background: rgba(57,255,136,0.08);
  border: 1px solid rgba(57,255,136,0.25);
}

.page-faq .faq-group__icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.page-faq .faq-group__badge {
  margin-left: auto;
}

/* ===== 单条问答 ===== */
.page-faq .faq-item {
  border: 1px solid rgba(255,255,255,0.1);
  background: var(--c-panel);
  margin-bottom: 12px;
  box-shadow: inset 4px 0 0 rgba(57,255,136,0.15);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.page-faq .faq-item:hover {
  border-color: rgba(57,255,136,0.35);
  box-shadow: inset 4px 0 0 rgba(57,255,136,0.45), 0 4px 24px rgba(0,0,0,0.25);
}

.page-faq .faq-item[open] {
  border-color: rgba(57,255,136,0.45);
  background: linear-gradient(135deg, rgba(57,255,136,0.05), transparent 55%), var(--c-panel);
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-white);
  user-select: none;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--c-gray);
  flex-shrink: 0;
  transition: color var(--transition), transform var(--transition);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  color: var(--c-accent);
  transform: scale(1.1);
}

.page-faq .faq-item__q {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-accent);
  background: rgba(57,255,136,0.1);
  border: 1px solid rgba(57,255,136,0.2);
  padding: 3px 7px;
  flex-shrink: 0;
}

.page-faq .faq-answer {
  padding: 0 20px 20px 20px;
  color: var(--c-gray);
  font-size: 14px;
}

.page-faq .faq-answer p {
  margin: 0 0 8px;
}

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

.page-faq .faq-answer a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(57,255,136,0.4);
}

.page-faq .faq-answer a:hover {
  color: var(--c-white);
  text-decoration-color: var(--c-white);
}

/* ===== 联系支持 ===== */
.page-faq .faq-group--support {
  margin-bottom: 0;
}

.page-faq .faq-support__grid {
  display: grid;
  gap: 24px;
}

.page-faq .faq-support__aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-support__media img {
  width: 100%;
  height: auto;
  background: var(--c-panel);
  border: 1px solid var(--c-border);
  clip-path: polygon(0 20px, 20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-faq .faq-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding: 132px 0 72px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
  }

  .page-faq .faq-hero__content h1 {
    font-size: 72px;
  }

  .page-faq .faq-main {
    padding: 72px 0 96px;
  }

  .page-faq .faq-main__grid {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-group__title {
    font-size: 36px;
  }

  .page-faq .faq-support__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
  }
}

/* ===== 窄屏优化 ===== */
@media (max-width: 640px) {
  .page-faq .faq-hero {
    padding-top: 80px;
  }

  .page-faq .faq-group__title {
    font-size: 26px;
  }

  .page-faq .faq-group__badge {
    margin-left: 0;
  }

  .page-faq .faq-item summary {
    align-items: flex-start;
    flex-wrap: wrap;
    padding: 14px 16px;
  }

  .page-faq .faq-item__q {
    font-size: 11px;
  }

  .page-faq .faq-item__text {
    flex: 1 1 auto;
  }

  .page-faq .faq-item summary::after {
    align-self: center;
  }
}