/* ===== 帮助中心 FAQ 页面专属样式 ===== */
@keyframes ai-faq-fade {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

.page-faq {
  background: var(--ai-paper);
  color: var(--ai-ink);
  font-family: var(--ai-sans);
  line-height: 1.7;
}

.page-faq .container {
  width: min(1200px, 100% - 32px);
  margin-inline: auto;
}

.page-faq .breadcrumb__list {
  padding: 20px 0 4px;
  font-size: 0.86rem;
}

/* Hero */
.page-faq .faq-hero {
  background: var(--ai-green);
  color: var(--ai-cream);
  padding: 40px 0 48px;
  border-bottom: 6px solid var(--ai-gold);
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, transparent 42%, rgba(242, 176, 30, 0.16) 42.2%, transparent 42.6%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 18px);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero__title {
  font-family: var(--ai-serif);
  font-weight: 900;
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  line-height: 1.18;
  margin: 12px 0 16px;
}

.page-faq .faq-hero__lead {
  color: #E6E1D4;
  font-size: 0.98rem;
  margin: 0 0 22px;
  max-width: 640px;
}

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

.page-faq .faq-hero__tags span {
  font-family: var(--ai-mono);
  font-size: 0.76rem;
  border: 1px solid rgba(245, 212, 122, 0.5);
  padding: 4px 10px;
  color: var(--ai-gold-light);
  background: rgba(11, 61, 46, 0.55);
}

.page-faq .faq-hero__media {
  border: 3px solid var(--ai-cream);
  outline: 2px dashed rgba(245, 212, 122, 0.5);
  outline-offset: -12px;
  padding: 10px;
  background: rgba(0, 0, 0, 0.22);
  box-shadow: 8px 8px 0 rgba(242, 176, 30, 0.28);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(245, 212, 122, 0.65);
}

/* 双栏布局 */
.page-faq .faq-layout {
  display: grid;
  gap: 32px;
  padding: 40px 0 72px;
}

/* 侧边索引 */
.page-faq .faq-siderail {
  background: var(--ai-green-2);
  border: 3px solid var(--ai-ink);
  box-shadow: var(--ai-shadow-hard);
  color: var(--ai-cream);
  align-self: start;
}

.page-faq .faq-siderail__head {
  padding: 20px 20px 14px;
  border-bottom: 2px solid rgba(245, 212, 122, 0.5);
}

.page-faq .faq-siderail__code {
  font-family: var(--ai-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--ai-gold);
}

.page-faq .faq-siderail__title {
  display: block;
  font-family: var(--ai-serif);
  font-size: 1.4rem;
  font-weight: 900;
  margin-top: 6px;
}

.page-faq .faq-index {
  display: block;
  padding: 12px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 12px;
  color: var(--ai-cream);
  text-decoration: none;
  border: 2px solid transparent;
  transition: border-color 0.25s, background-color 0.25s, transform 0.25s;
}

.page-faq .faq-index__link:hover {
  background: rgba(242, 176, 30, 0.12);
  border-color: var(--ai-gold);
  transform: translateX(4px);
}

.page-faq .faq-index__num {
  font-family: var(--ai-mono);
  font-size: 0.85rem;
  color: var(--ai-gold);
  min-width: 2ch;
}

.page-faq .faq-index__text {
  flex: 1;
  font-size: 0.95rem;
  font-weight: 700;
}

.page-faq .faq-index__count {
  font-family: var(--ai-mono);
  font-size: 0.8rem;
  background: rgba(242, 176, 30, 0.15);
  border-radius: 999px;
  padding: 2px 10px;
  color: var(--ai-gold-light);
}

.page-faq .faq-siderail__foot {
  padding: 14px 20px 20px;
  border-top: 2px dashed rgba(245, 212, 122, 0.4);
}

.page-faq .faq-siderail__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 10px 0 0;
}

.page-faq .faq-siderail__stats div {
  background: rgba(11, 61, 46, 0.5);
  border-left: 3px solid var(--ai-gold);
  padding: 8px 6px;
  text-align: center;
}

.page-faq .faq-siderail__stats dt {
  font-size: 0.72rem;
  color: #C9E0D6;
}

.page-faq .faq-siderail__stats dd {
  margin: 4px 0 0;
  font-family: var(--ai-serif);
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--ai-gold-light);
}

.page-faq .faq-siderail__foot-note {
  margin-top: 12px;
  font-size: 0.8rem;
  color: #C9E0D6;
  line-height: 1.6;
}

.page-faq .faq-siderail__link {
  color: var(--ai-gold-light);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 700;
}

.page-faq .faq-siderail__link:hover {
  color: var(--ai-gold);
}

/* 问答组 */
.page-faq .faq-groups {
  display: grid;
  gap: 40px;
}

.page-faq .faq-section {
  scroll-margin-top: 130px;
}

.page-faq .faq-section__header {
  margin-bottom: 18px;
  padding-left: 18px;
  border-left: 6px solid var(--ai-gold);
}

.page-faq .faq-section__heading {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.page-faq .faq-section__num {
  font-family: var(--ai-mono);
  font-weight: 700;
  font-size: 1.1rem;
  background: var(--ai-green);
  color: var(--ai-gold-light);
  padding: 6px 18px 6px 12px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  line-height: 1.2;
}

.page-faq .faq-section__title {
  font-family: var(--ai-serif);
  font-size: 1.5rem;
  font-weight: 900;
  margin: 0;
}

.page-faq .faq-section__desc {
  margin: 8px 0 0;
  font-size: 0.92rem;
  color: #5D5348;
}

.page-faq .faq-stack {
  display: grid;
  gap: 14px;
}

/* 手风琴条目 */
.page-faq .faq-item {
  background: var(--ai-cream);
  border: 2px solid var(--ai-ink);
  border-left: 6px solid var(--ai-ink);
  box-shadow: 5px 5px 0 rgba(27, 94, 74, 0.2);
  transition: box-shadow 0.25s, border-color 0.25s;
}

.page-faq .faq-item[open] {
  border-left-color: var(--ai-gold);
  box-shadow: 7px 7px 0 rgba(27, 94, 74, 0.3);
}

.page-faq .faq-item[open] .faq-item__body {
  animation: ai-faq-fade 0.28s ease both;
}

.page-faq .faq-item__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 18px 18px 22px;
}

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

.page-faq .faq-item__summary:focus-visible {
  outline: 3px solid var(--ai-gold);
  outline-offset: -4px;
}

.page-faq .faq-item__q {
  font-weight: 800;
  font-size: 0.98rem;
  line-height: 1.5;
}

.page-faq .faq-item__icon {
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  position: relative;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--ai-ink);
  transition: transform 0.25s ease;
}

.page-faq .faq-item__icon::before {
  left: 15%;
  right: 15%;
  top: 50%;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .faq-item__icon::after {
  top: 15%;
  bottom: 15%;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: translateX(-50%) scaleY(0);
}

.page-faq .faq-item__body {
  padding: 0 22px 22px;
  border-top: 1px dashed rgba(26, 26, 26, 0.2);
  font-size: 0.92rem;
  color: #443D35;
}

.page-faq .faq-item__body p {
  margin: 14px 0 0;
}

.page-faq .faq-item__body p + p {
  margin-top: 8px;
}

.page-faq .faq-item__body .text-link {
  color: var(--ai-green-2);
  font-weight: 700;
}

/* 数据答疑视觉块 */
.page-faq .faq-visual {
  display: grid;
  gap: 20px;
  background: var(--ai-charcoal);
  color: var(--ai-cream);
  border: 3px solid var(--ai-ink);
  box-shadow: var(--ai-shadow-hard);
  padding: 18px;
  align-items: center;
}

.page-faq .faq-visual__media {
  border: 2px solid var(--ai-gold);
  padding: 6px;
  background: #1B1B1B;
}

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

.page-faq .faq-visual__copy {
  padding: 4px 10px 10px;
}

.page-faq .faq-visual__kicker {
  font-family: var(--ai-mono);
  font-size: 0.78rem;
  color: var(--ai-gold);
  letter-spacing: 0.12em;
}

.page-faq .faq-visual__copy p {
  font-size: 0.95rem;
  margin: 10px 0 18px;
  color: #E8E3D6;
}

.page-faq .faq-visual__copy .btn {
  text-decoration: none;
}

/* 反馈区块 */
.page-faq .faq-feedback {
  background: var(--ai-gold);
  border: 3px solid var(--ai-ink);
  box-shadow: var(--ai-shadow-hard);
  padding: 36px 28px;
  position: relative;
}

.page-faq .faq-feedback__inner {
  max-width: 620px;
}

.page-faq .faq-feedback__code {
  font-family: var(--ai-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--ai-green);
}

.page-faq .faq-feedback__title {
  font-family: var(--ai-serif);
  font-size: 1.5rem;
  font-weight: 900;
  margin: 8px 0 12px;
}

.page-faq .faq-feedback p {
  font-size: 0.95rem;
  max-width: 560px;
}

.page-faq .faq-feedback__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 22px;
}

.page-faq .faq-feedback__actions .btn {
  text-decoration: none;
}

.page-faq .faq-feedback__actions .btn--gold {
  border-color: var(--ai-green);
  background: var(--ai-green);
  color: var(--ai-cream);
}

.page-faq .faq-feedback__actions .btn--ghost {
  border-color: var(--ai-green);
  color: var(--ai-green);
  background: transparent;
}

@media (min-width: 820px) {
  .page-faq .faq-hero {
    padding: 56px 0 64px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 40px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
    padding: 56px 0 88px;
  }

  .page-faq .faq-siderail {
    position: sticky;
    top: 130px;
  }

  .page-faq .faq-visual {
    grid-template-columns: 0.9fr 1.1fr;
    padding: 24px;
  }

  .page-faq .faq-feedback {
    padding: 44px 40px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-layout {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation: none !important;
    transition: none !important;
  }
}