.page-faq {
  --faq-index-w: 280px;
  background:
    radial-gradient(circle at 88% 12%, rgba(216, 154, 126, 0.16), transparent 28%),
    radial-gradient(circle at 8% 52%, rgba(85, 107, 77, 0.1), transparent 26%),
    var(--color-cream);
}

.page-faq [hidden] {
  display: none !important;
}

/* ===== Hero ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3rem, 8vw, 5.5rem) 1.25rem clamp(2rem, 5vw, 3.5rem);
  background:
    linear-gradient(120deg, rgba(232, 73, 27, 0.82) 0%, rgba(180, 95, 63, 0) 45%),
    radial-gradient(circle at 80% 20%, rgba(201, 162, 39, 0.24), transparent 40%),
    radial-gradient(circle at 15% 90%, rgba(30, 58, 95, 0.8), transparent 50%),
    var(--color-ink);
  color: var(--color-cream);
  border-bottom: 4px solid var(--color-signal);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -6rem;
  right: -6rem;
  width: 22rem;
  height: 22rem;
  border: 1px solid rgba(245, 237, 227, 0.14);
  border-radius: 50%;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "?";
  position: absolute;
  right: 1.5rem;
  bottom: -1.8rem;
  font-family: var(--font-head);
  font-size: 14rem;
  font-weight: 200;
  line-height: 1;
  color: rgba(245, 237, 227, 0.05);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2rem;
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-faq .faq-hero__content {
  min-width: 0;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 1.25rem;
}

.page-faq .faq-hero .breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  color: rgba(245, 237, 227, 0.7);
  font-size: 0.85rem;
}

.page-faq .faq-hero .breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 0.5rem;
  color: rgba(245, 237, 227, 0.4);
}

.page-faq .faq-hero .breadcrumb a {
  color: var(--color-clay-light);
  text-decoration: none;
  transition: color var(--transition);
}

.page-faq .faq-hero .breadcrumb a:hover {
  color: var(--color-cream);
}

.page-faq .faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-clay-light);
}

.page-faq .faq-hero__kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
}

.page-faq .faq-hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-head);
  font-weight: 200;
  font-size: clamp(2.6rem, 7vw, 5rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.page-faq .faq-hero__lead {
  max-width: 44rem;
  margin: 0;
  color: rgba(245, 237, 227, 0.78);
  font-size: 1.05rem;
  line-height: 1.8;
}

.page-faq .faq-hero__content::after {
  content: "";
  display: block;
  width: 72px;
  height: 4px;
  margin-top: 1.5rem;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-signal));
}

.page-faq .faq-hero__visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  transform: rotate(1.5deg) scale(0.98);
  background:
    radial-gradient(circle at 30% 30%, rgba(232, 73, 27, 0.3), transparent 50%),
    var(--color-rock);
  border: 1px solid rgba(245, 237, 227, 0.2);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
}

.page-faq .faq-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  opacity: 0.95;
}

/* ===== 主布局 ===== */
.page-faq .faq-layout {
  display: block;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 4rem) 1.25rem clamp(3rem, 7vw, 6rem);
}

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

/* ===== 索引栏 ===== */
.page-faq .faq-index {
  margin-bottom: 2.25rem;
  padding: 1.25rem 1.25rem 1.5rem;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(43, 41, 38, 0.08);
  border-top: 3px solid var(--color-signal);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.page-faq .faq-index__title {
  margin: 0 0 0.25rem;
  font-family: var(--font-head);
  font-weight: 200;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.page-faq .faq-index__lead {
  margin: 0 0 1rem;
  color: var(--color-stone);
  font-size: 0.875rem;
  line-height: 1.6;
}

.page-faq .faq-index__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.page-faq .filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--color-stone);
  border-radius: 999px;
  background: var(--color-panel);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1.4;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.page-faq .filter-btn span {
  font-size: 0.75rem;
  opacity: 0.7;
}

.page-faq .filter-btn:hover {
  border-color: var(--color-moss);
  color: var(--color-moss);
}

.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--color-clay);
  border-color: var(--color-clay);
  color: #ffffff;
}

.page-faq .faq-index__list {
  counter-reset: faq-index;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__item {
  counter-increment: faq-index;
  margin: 0;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.7rem 0.25rem;
  border-bottom: 1px solid rgba(43, 41, 38, 0.07);
  color: var(--color-ink);
  text-decoration: none;
  font-size: 0.95rem;
  line-height: 1.5;
  transition: color var(--transition), padding-left var(--transition);
}

.page-faq .faq-index__link::before {
  content: counter(faq-index, decimal-leading-zero);
  min-width: 2em;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.7rem;
  color: var(--color-clay);
}

.page-faq .faq-index__link:hover {
  padding-left: 0.5rem;
  color: var(--color-clay);
}

/* ===== 分组 ===== */
.page-faq .faq-group {
  position: relative;
  padding-top: 0.25rem;
}

.page-faq .faq-group + .faq-group {
  margin-top: 0.75rem;
  padding-top: 2.25rem;
  border-top: 1px dashed rgba(43, 41, 38, 0.12);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.page-faq .faq-group__index {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--color-signal);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 200;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.page-faq .faq-group__desc {
  margin: 0 0 1.25rem;
  color: var(--color-stone);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ===== 手风琴项目 ===== */
.page-faq .faq-item {
  margin-bottom: 0.875rem;
  overflow: hidden;
  background: var(--color-panel);
  border: 1px solid rgba(43, 41, 38, 0.08);
  border-left: 3px solid transparent;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.page-faq .faq-item:hover {
  border-left-color: var(--color-clay);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-item:target {
  border-left-color: var(--color-signal);
  box-shadow: 0 0 0 3px rgba(232, 73, 27, 0.12), var(--shadow-panel);
}

.page-faq .faq-item__summary {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 1.1rem 1.25rem;
  cursor: pointer;
  color: var(--color-ink);
  font-weight: 500;
  list-style: none;
  transition: color var(--transition);
}

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

.page-faq .faq-item__summary:hover {
  color: var(--color-clay);
}

.page-faq .faq-item__summary:focus-visible {
  outline: 2px solid var(--color-moss);
  outline-offset: -2px;
}

.page-faq .faq-item__num {
  min-width: 1.75rem;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--color-clay);
}

.page-faq .faq-item__q {
  flex: 1;
  line-height: 1.6;
}

.page-faq .faq-item__mark {
  position: relative;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 0.15rem;
  border: 1px solid rgba(43, 41, 38, 0.2);
  border-radius: 50%;
  transition: background var(--transition), border-color var(--transition);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-clay);
}

.page-faq .faq-item__mark::before {
  width: 10px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  width: 2px;
  height: 10px;
}

.page-faq details[open] .faq-item__mark {
  background: var(--color-clay);
  border-color: var(--color-clay);
}

.page-faq details[open] .faq-item__mark::after {
  height: 0;
}

.page-faq details[open] .faq-item__mark::before {
  background: #ffffff;
}

.page-faq details[open] > .faq-item__summary {
  border-bottom: 1px solid rgba(43, 41, 38, 0.06);
  color: var(--color-clay);
}

.page-faq .faq-item__answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.4s var(--ease-out);
}

.page-faq details[open] .faq-item__answer {
  grid-template-rows: 1fr;
}

.page-faq .faq-item__answer-inner {
  overflow: hidden;
}

.page-faq .faq-item__answer-body {
  margin: 0 1.25rem 1.25rem 3.75rem;
  padding: 0.8rem 0 0.25rem 1rem;
  border-left: 2px solid rgba(180, 95, 63, 0.2);
  color: var(--color-stone);
  font-size: 0.95rem;
  line-height: 1.8;
}

.page-faq .faq-item__answer-body p {
  margin: 0 0 0.75rem;
}

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

.page-faq .faq-item__answer-body a {
  color: var(--color-moss);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

.page-faq .faq-item__answer-body a:hover {
  color: var(--color-clay);
}

/* ===== 兼容性配图 ===== */
.page-faq .faq-group__visual {
  max-width: 400px;
  margin: 1.5rem 0 0 auto;
  overflow: hidden;
  border: 1px solid rgba(30, 58, 95, 0.15);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-deepblue), var(--color-ink));
  box-shadow: var(--shadow-card);
}

.page-faq .faq-group__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  opacity: 0.95;
}

/* ===== 帮助 CTA ===== */
.page-faq .faq-help {
  padding: clamp(2.5rem, 6vw, 5rem) 1.25rem;
  background:
    radial-gradient(circle at 80% 0%, rgba(201, 162, 39, 0.14), transparent 35%),
    radial-gradient(circle at 10% 100%, rgba(232, 73, 27, 0.18), transparent 40%),
    var(--color-ink);
  color: var(--color-cream);
}

.page-faq .faq-help__inner {
  display: grid;
  justify-items: center;
  gap: 1rem;
  max-width: var(--content-max);
  margin: 0 auto;
  text-align: center;
}

.page-faq .faq-help h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 200;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  letter-spacing: -0.02em;
}

.page-faq .faq-help__desc {
  max-width: 36rem;
  margin: 0 auto 1.5rem;
  color: rgba(245, 237, 227, 0.72);
  line-height: 1.8;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.page-faq .faq-help .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.625rem 1.5rem;
  border: 1px solid rgba(245, 237, 227, 0.25);
  border-radius: 999px;
  background: transparent;
  color: var(--color-cream);
  font-family: var(--font-body);
  font-size: 0.95rem;
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.page-faq .faq-help .btn-primary {
  background: var(--color-clay);
  border-color: var(--color-clay);
  color: #ffffff;
  font-weight: 500;
}

.page-faq .faq-help .btn:hover {
  transform: translateY(-2px);
}

/* ===== 桌面端增强 ===== */
@media (min-width: 820px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
    align-items: center;
    gap: clamp(2rem, 5vw, 5rem);
  }
}

@media (min-width: 1020px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
    gap: clamp(2rem, 4vw, 4rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 2rem;
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
  }

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