/* ===== 页面：FAQ 帮助文档 ===== */
.page-faq {
  --faq-icon-size: 0.7rem;
  background:
    radial-gradient(rgba(17, 16, 15, 0.02) 1px, transparent 1px),
    var(--c-paper);
  background-size: 18px 18px, 100% 100%;
}

/* 面包屑 */
.page-faq .page-faq__crumb {
  padding-top: 1rem;
  padding-bottom: 0.5rem;
}

/* 页头 */
.page-faq .page-header {
  border-bottom: 1px solid var(--c-darkgold);
}

.page-faq .page-header__desc {
  max-width: 48rem;
}

/* 搜索层 */
.page-faq .page-faq__search-layer {
  position: relative;
  padding: clamp(2rem, 5vw, 4rem) 0;
  border-bottom: 1px solid var(--c-darkgold);
  color: var(--c-paper);
  background:
    radial-gradient(rgba(201, 160, 99, 0.06) 1px, transparent 1px),
    linear-gradient(135deg, rgba(169, 25, 46, 0.1) 0%, transparent 45%),
    linear-gradient(180deg, #1a1815 0%, var(--c-black) 100%);
  background-size: 14px 14px, 100% 100%, 100% 100%;
}

.page-faq .page-faq__search-layer::after {
  content: "FAQ 2024";
  position: absolute;
  right: 1rem;
  bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: rgba(201, 160, 99, 0.4);
}

.page-faq .page-faq__search-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3.5rem);
  align-items: center;
}

@media (min-width: 880px) {
  .page-faq .page-faq__search-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

.page-faq .page-faq__kicker {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.page-faq .page-faq__kicker::before {
  content: "";
  width: 2rem;
  height: 1px;
  background: var(--c-gold);
}

.page-faq .page-faq__search-title {
  margin-bottom: 1.25rem;
  font-family: var(--font-head);
  font-size: var(--font-h2);
  line-height: 1.2;
  color: var(--c-paper);
}

.page-faq .page-faq__search-box {
  display: flex;
  align-items: center;
  max-width: 34rem;
  padding: 0.2rem 0.2rem 0.2rem 0.75rem;
  border: 1px solid var(--c-mist);
  background: var(--c-paper);
}

.page-faq .page-faq__search-box:focus-within {
  border-color: var(--c-gold);
}

.page-faq .page-faq__search-icon {
  flex: none;
  width: 1.1rem;
  height: 1.1rem;
  margin-right: 0.5rem;
  fill: none;
  stroke: var(--c-taupe);
  stroke-width: 2;
  stroke-linecap: round;
}

.page-faq .page-faq__search-input {
  flex: 1;
  min-width: 0;
  padding: 0.6rem 0.5rem;
  border: 0;
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--c-black);
  outline: none;
}

.page-faq .page-faq__search-input:focus {
  box-shadow: inset 0 0 0 2px var(--c-blue);
}

.page-faq .page-faq__search-hint {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(245, 241, 232, 0.65);
}

.page-faq .page-faq__tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.page-faq .page-faq__tag-row .tag {
  padding: 0.4rem 0.6rem;
  border-radius: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-faq .page-faq__tag-row .tag--red {
  border: 1px solid var(--c-gold);
  color: var(--c-gold);
  background: rgba(201, 160, 99, 0.08);
}

.page-faq .page-faq__tag-row .tag--red:hover,
.page-faq .page-faq__tag-row .tag--red:focus-visible {
  border-color: var(--c-gold);
  background: var(--c-gold);
  color: var(--c-black);
}

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

.page-faq .page-faq__figure-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--c-darkgold);
  background: var(--c-mist);
  filter: grayscale(0.4) sepia(0.15);
}

.page-faq .page-faq__search-figure figcaption,
.page-faq .page-faq__paper-figure figcaption {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--c-gold);
}

/* FAQ 分区 */
.page-faq .page-faq__faq-wrap {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .page-faq__faq-wrap--tint {
  background:
    linear-gradient(rgba(17, 16, 15, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 16, 15, 0.03) 1px, transparent 1px),
    var(--c-mist);
  background-size: 20px 20px, 20px 20px, 100% 100%;
}

.page-faq .page-faq__faq-wrap:target .section-head .section-kicker {
  color: var(--c-darkgold);
}

.page-faq .page-faq__faq-wrap:target .section-head .section-title {
  color: var(--c-red);
}

.page-faq .page-faq__section-head {
  margin-bottom: 2rem;
}

.page-faq .page-faq__list {
  display: grid;
  gap: 0.9rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--c-mist);
}

.page-faq .page-faq__item {
  border: 1px solid var(--c-mist);
  border-left: 3px solid var(--c-red);
  background: var(--c-paper);
  box-shadow: 0 2px 0 rgba(17, 16, 15, 0.03);
  transition: border-color 0.2s ease, border-left-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.page-faq .page-faq__item:hover {
  border-color: var(--c-gold);
  border-left-color: var(--c-gold);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.page-faq .page-faq__item[open] {
  border-left-color: var(--c-darkgold);
}

.page-faq .page-faq__item--dark {
  border-color: rgba(255, 255, 255, 0.08);
  border-left-color: var(--c-gold);
  background: var(--c-black);
}

.page-faq .page-faq__item--dark:hover {
  border-color: var(--c-gold);
}

.page-faq .page-faq__item--dark[open] {
  border-left-color: var(--c-red);
}

.page-faq .page-faq__question {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-black);
  transition: background-color 0.2s ease;
}

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

.page-faq .page-faq__question:focus-visible {
  outline: 2px solid var(--c-blue);
  outline-offset: -2px;
}

.page-faq .page-faq__question:hover {
  background: rgba(17, 16, 15, 0.02);
}

.page-faq .page-faq__item--dark .page-faq__question {
  color: var(--c-paper);
}

.page-faq .page-faq__item--dark .page-faq__question:hover {
  background: rgba(255, 255, 255, 0.03);
}

.page-faq .page-faq__num {
  flex: none;
  padding: 0.22rem 0.42rem;
  border: 1px solid var(--c-red);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  line-height: 1;
  white-space: nowrap;
  color: var(--c-red);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-faq .page-faq__item[open] .page-faq__num {
  border-color: var(--c-gold);
  background: var(--c-gold);
  color: var(--c-black);
}

.page-faq .page-faq__item--dark .page-faq__num {
  border-color: var(--c-gold);
  color: var(--c-gold);
}

.page-faq .page-faq__item--dark[open] .page-faq__num {
  border-color: var(--c-gold);
  background: var(--c-gold);
  color: var(--c-black);
}

.page-faq .page-faq__q-text {
  flex: 1;
}

.page-faq .page-faq__icon {
  position: relative;
  flex: none;
  width: var(--faq-icon-size);
  height: var(--faq-icon-size);
  transition: transform 0.25s ease;
}

.page-faq .page-faq__icon::before,
.page-faq .page-faq__icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform 0.25s ease;
}

.page-faq .page-faq__icon::before {
  top: 0.29rem;
  left: 0;
  width: var(--faq-icon-size);
  height: 0.12rem;
}

.page-faq .page-faq__icon::after {
  top: 0;
  left: 0.29rem;
  width: 0.12rem;
  height: var(--faq-icon-size);
}

.page-faq .page-faq__item[open] .page-faq__icon {
  transform: rotate(45deg);
}

.page-faq .page-faq__answer {
  padding: 0.25rem 1.25rem 1.15rem;
  border-top: 1px solid var(--c-mist);
  animation: page-faq-answer-in 0.25s ease;
}

.page-faq .page-faq__item--dark .page-faq__answer {
  border-top-color: rgba(255, 255, 255, 0.08);
}

.page-faq .page-faq__answer p {
  margin: 0;
  font-size: var(--font-body-size);
  line-height: 1.8;
  color: var(--c-taupe);
}

.page-faq .page-faq__item--dark .page-faq__answer p {
  color: rgba(245, 241, 232, 0.72);
}

.page-faq .page-faq__answer a {
  color: var(--c-red);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.page-faq .page-faq__item--dark .page-faq__answer a {
  color: var(--c-gold);
}

@keyframes page-faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* 联系层 */
.page-faq .page-faq__contact-layer {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  border-top: 1px solid var(--c-darkgold);
  color: var(--c-paper);
  background:
    radial-gradient(rgba(201, 160, 99, 0.05) 1px, transparent 1px),
    linear-gradient(180deg, #151310 0%, var(--c-black) 100%);
  background-size: 14px 14px, 100% 100%;
}

.page-faq .page-faq__contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 720px) {
  .page-faq .page-faq__contact-grid {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 3rem;
  }
}

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

.page-faq .page-faq__paper-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--c-darkgold);
  filter: sepia(0.25);
}

.page-faq .page-faq__contact-card {
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-top: 3px solid var(--c-gold);
  background: rgba(255, 255, 255, 0.03);
}

.page-faq .page-faq__contact-title {
  margin-bottom: 1rem;
  font-family: var(--font-head);
  font-size: var(--font-h2);
  line-height: 1.25;
  color: var(--c-paper);
}

.page-faq .page-faq__contact-text {
  font-size: var(--font-body-size);
  line-height: 1.8;
  color: rgba(245, 241, 232, 0.7);
}

.page-faq .page-faq__contact-text a {
  color: var(--c-gold);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.page-faq .page-faq__contact-trust {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(245, 241, 232, 0.5);
}

/* 搜索过滤隐藏 */
.page-faq .is-hidden {
  display: none !important;
}