.page-faq {
  --faq-red: var(--primary-red);
  --faq-gold: var(--gold);
  --faq-grey: var(--grey-blue);
  --faq-cardbg: var(--card-bg);
  background: var(--warm-paper);
  color: var(--dark-ink);
}

/* ========== Hero ========== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 2.5rem 0 3rem;
  background:
    linear-gradient(115deg, rgba(43, 43, 43, 0.97) 0%, rgba(140, 58, 43, 0.94) 62%, rgba(140, 58, 43, 0.9) 100%),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.04) 0 2px, transparent 2px 14px);
  color: var(--warm-paper);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, transparent 60%, rgba(201, 160, 99, 0.18) 100%);
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-red) 0%, var(--gold) 55%, var(--grey-blue) 100%);
}

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

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  color: rgba(245, 240, 230, 0.62);
  margin-bottom: 1.5rem;
}
.page-faq .breadcrumb a {
  color: rgba(245, 240, 230, 0.82);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  transition: color 0.2s ease;
}
.page-faq .breadcrumb a:hover {
  color: var(--gold);
}
.page-faq .breadcrumb-sep {
  color: var(--gold);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.page-faq .faq-hero-tag {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.22em;
  color: var(--gold);
  margin: 0 0 0.75rem;
}

.page-faq .hero-title {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  line-height: 1.16;
  letter-spacing: 0.02em;
  margin: 0 0 1rem;
  color: var(--warm-paper);
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.28);
}

.page-faq .faq-hero-lead {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(245, 240, 230, 0.82);
  max-width: 34em;
  margin: 0 0 1.5rem;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.page-faq .faq-hero-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.65rem 1.35rem;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.page-faq .faq-hero-btn.btn-solid {
  background: var(--gold);
  border: 1px solid var(--gold);
  color: #2b2b2b;
}
.page-faq .faq-hero-btn.btn-solid:hover {
  background: var(--primary-red);
  border-color: var(--primary-red);
  color: var(--warm-paper);
  transform: translateY(-1px);
}
.page-faq .faq-hero-btn.btn-outline {
  background: transparent;
  border: 1px solid rgba(245, 240, 230, 0.55);
  color: var(--warm-paper);
}
.page-faq .faq-hero-btn.btn-outline:hover {
  border-color: var(--gold);
  color: var(--gold);
  transform: translateY(-1px);
}
.page-faq .faq-hero-btn:focus-visible,
.page-faq .faq-help-btn:focus-visible,
.page-faq .faq-help-link:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}

.page-faq .faq-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
  margin-top: 2rem;
  border-top: 1px solid rgba(245, 240, 230, 0.25);
  padding-top: 1.5rem;
}
.page-faq .faq-hero-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.page-faq .faq-stat-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1.1;
}
.page-faq .faq-stat-label {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: rgba(245, 240, 230, 0.68);
}

.page-faq .faq-hero-media {
  position: relative;
  overflow: hidden;
  border-radius: 0.875rem;
  border: 1px solid rgba(245, 240, 230, 0.32);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.24);
}
.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ========== 浏览区 ========== */
.page-faq .faq-browser {
  padding: 3rem 0 2.5rem;
  background: var(--warm-paper);
}

.page-faq .faq-browser-heading {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  border-left: 4px solid var(--primary-red);
  padding-left: 1rem;
  margin-bottom: 1.75rem;
}
.page-faq .faq-browser-heading .section-index {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--primary-red);
  letter-spacing: 0.08em;
}
.page-faq .faq-browser-heading .section-title {
  font-family: var(--font-heading);
  font-size: 1.9rem;
  font-weight: 700;
  margin: 0;
  color: var(--dark-ink);
}

/* ========== 过滤器 ========== */
.page-faq .faq-filter-wrap {
  position: relative;
}
.page-faq .faq-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.page-faq .faq-filter-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.page-faq .faq-filter-label {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 1.1rem;
  border: 1px solid rgba(74, 93, 110, 0.45);
  border-radius: 999px;
  background: transparent;
  color: var(--grey-blue);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.2;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.page-faq .faq-filter-label::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.55;
  transition: opacity 0.2s ease, background 0.2s ease;
}
.page-faq .faq-filter-label:hover {
  border-color: var(--primary-red);
  color: var(--primary-red);
}
.page-faq .faq-filter-input:checked + .faq-filter-label {
  background: var(--primary-red);
  border-color: var(--primary-red);
  color: var(--warm-paper);
}
.page-faq .faq-filter-input:checked + .faq-filter-label::before {
  opacity: 1;
  background: var(--gold);
}
.page-faq .faq-filter-input:focus-visible + .faq-filter-label {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}

/* ========== 分类筛选规则 ========== */
.page-faq #f-all:checked ~ .faq-list .faq-group {
  display: block;
}
.page-faq #f-platform:checked ~ .faq-list .faq-group[data-group="platform"] {
  display: block;
}
.page-faq #f-platform:checked ~ .faq-list .faq-group:not([data-group="platform"]) {
  display: none;
}
.page-faq #f-data:checked ~ .faq-list .faq-group[data-group="data"] {
  display: block;
}
.page-faq #f-data:checked ~ .faq-list .faq-group:not([data-group="data"]) {
  display: none;
}
.page-faq #f-area:checked ~ .faq-list .faq-group[data-group="area"] {
  display: block;
}
.page-faq #f-area:checked ~ .faq-list .faq-group:not([data-group="area"]) {
  display: none;
}

/* ========== 问题分组 ========== */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 2.75rem;
}
.page-faq .faq-group {
  scroll-margin-top: 6.5rem;
  animation: faqGroupFadeIn 0.3s ease both;
}
@keyframes faqGroupFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 0.9rem;
  align-items: baseline;
  border-bottom: 2px solid rgba(74, 93, 110, 0.25);
  padding-bottom: 0.8rem;
  margin-bottom: 1.2rem;
}
.page-faq .faq-group-no {
  grid-row: span 2;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--gold);
  background: var(--dark-ink);
  padding: 0.25rem 0.6rem;
  border-radius: 0.25rem;
}
.page-faq .faq-group-title {
  font-family: var(--font-heading);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 0;
  color: var(--dark-ink);
}
.page-faq .faq-group-desc {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--grey-blue);
  margin: 0;
}

/* ========== 手风琴 ========== */
.page-faq .faq-stack {
  display: grid;
  gap: 0.85rem;
}
.page-faq .faq-item {
  position: relative;
  background: var(--faq-cardbg);
  border: 1px solid rgba(74, 93, 110, 0.28);
  border-radius: 0.75rem;
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.page-faq .faq-item:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-1px);
  border-color: rgba(140, 58, 43, 0.5);
}
.page-faq .faq-item[open] {
  border-color: var(--primary-red);
  background: #fdfbf5;
  box-shadow: 0 12px 32px rgba(43, 43, 43, 0.08);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1.1rem 1.2rem;
  cursor: pointer;
  list-style: none;
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: -3px;
  border-radius: 0.75rem;
}

.page-faq .faq-q-index {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--grey-blue);
  transition: color 0.2s ease;
}
.page-faq .faq-item[open] .faq-q-index {
  color: var(--primary-red);
}

.page-faq .faq-q-text {
  flex: 1;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--dark-ink);
  transition: color 0.2s ease;
}
.page-faq .faq-item[open] .faq-q-text {
  color: var(--primary-red);
}

.page-faq .faq-q-icon {
  position: relative;
  flex: none;
  width: 1.6rem;
  height: 1.6rem;
  border: 1px solid currentColor;
  border-radius: 50%;
  color: var(--grey-blue);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.25s ease, color 0.2s ease, border-color 0.2s ease;
}
.page-faq .faq-q-icon::before,
.page-faq .faq-q-icon::after {
  content: "";
  position: absolute;
  display: block;
  width: 0.6rem;
  height: 1px;
  background: currentColor;
}
.page-faq .faq-q-icon::after {
  transform: rotate(90deg);
}
.page-faq .faq-item[open] .faq-q-icon {
  color: var(--gold);
  border-color: var(--gold);
  transform: rotate(45deg);
}

.page-faq .faq-answer {
  padding: 0 1.2rem 1.3rem 3.2rem;
  max-width: 60rem;
}
.page-faq .faq-answer p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(43, 43, 43, 0.84);
}
.page-faq .faq-answer a {
  color: var(--primary-red);
  text-underline-offset: 0.2em;
  transition: color 0.2s ease;
}
.page-faq .faq-answer a:hover {
  color: var(--gold);
}
.page-faq .faq-answer strong {
  color: var(--primary-red);
  font-weight: 700;
}

/* ========== 可信声明 ========== */
.page-faq .faq-trust-note {
  margin: 3rem 0 0;
  padding: 0.9rem 1.1rem;
  border-left: 3px solid var(--gold);
  background: var(--card-bg);
  color: var(--grey-blue);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.6;
}

/* ========== 帮助横幅 ========== */
.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  background: var(--dark-ink);
  color: var(--warm-paper);
  padding: 3rem 0;
}
.page-faq .faq-help::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 0.5rem;
  background: linear-gradient(180deg, var(--primary-red) 0%, var(--gold) 55%, var(--grey-blue) 100%);
}
.page-faq .faq-help::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.03) 0 2px, transparent 2px 12px);
}

.page-faq .faq-help-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

.page-faq .faq-help-tag {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  text-transform: uppercase;
  margin: 0 0 0.6rem;
}

.page-faq .faq-help h2 {
  font-family: var(--font-heading);
  font-size: 1.9rem;
  line-height: 1.25;
  margin: 0 0 0.9rem;
  color: var(--warm-paper);
}

.page-faq .faq-help-copy > p:not(.faq-help-tag) {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(245, 240, 230, 0.78);
  max-width: 32em;
  margin: 0 0 1.6rem;
}

.page-faq .faq-help-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
}
.page-faq .faq-help-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.7rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  background: var(--primary-red);
  border: 1px solid var(--primary-red);
  color: var(--warm-paper);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.page-faq .faq-help-btn:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: #2b2b2b;
  transform: translateY(-1px);
}
.page-faq .faq-help-link {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 0.25em;
  transition: color 0.2s ease;
}
.page-faq .faq-help-link:hover {
  color: var(--warm-paper);
}

.page-faq .faq-help-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border-radius: 0.875rem;
  border: 1px solid rgba(245, 240, 230, 0.25);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.28);
}

/* ========== 中间宽度适配 ========== */
@media (min-width: 640px) {
  .page-faq .faq-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .faq-stack {
    grid-template-columns: 1fr;
  }
}

/* ========== 桌面适配 ========== */
@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 3.5rem 0 4.5rem;
  }
  .page-faq .faq-hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
    align-items: center;
  }
  .page-faq .hero-title {
    font-size: 3.5rem;
  }
  .page-faq .faq-hero-lead {
    font-size: 1.125rem;
  }
  .page-faq .faq-stat-num {
    font-size: 1.8rem;
  }

  .page-faq .faq-browser {
    padding: 4.5rem 0 3.5rem;
  }
  .page-faq .faq-browser-heading .section-title {
    font-size: 2.2rem;
  }
  .page-faq .faq-group-title {
    font-size: 2rem;
  }

  .page-faq .faq-item summary {
    padding: 1.25rem 1.5rem;
  }
  .page-faq .faq-q-text {
    font-size: 1.125rem;
  }
  .page-faq .faq-answer {
    padding: 0 1.5rem 1.4rem 3.6rem;
  }
  .page-faq .faq-answer p {
    font-size: 1rem;
  }

  .page-faq .faq-help {
    padding: 4.5rem 0;
  }
  .page-faq .faq-help-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3.5rem;
  }
  .page-faq .faq-help h2 {
    font-size: 2.2rem;
  }
}