/* ===== 常见问题页专属样式 ===== */
.page-faq {
  --faq-kicker-color: var(--color-accent);
  --faq-card-bg: var(--glass-panel);
  --faq-line: var(--border-soft);
  position: relative;
  background-image:
    radial-gradient(1000px 420px at 94% -4%, rgba(30, 58, 138, 0.48), transparent 60%),
    radial-gradient(760px 360px at 8% 8%, rgba(0, 255, 157, 0.06), transparent 60%);
  color: var(--color-text);
}

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

.page-faq .faq-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  margin-bottom: 2.25rem;
  padding: 1.75rem 1.5rem 2rem;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.32), rgba(255, 255, 255, 0.03));
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset-inline-end: -2rem;
  top: -3rem;
  width: 14rem;
  height: 14rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 255, 157, 0.18), transparent 65%);
  pointer-events: none;
}

.page-faq .faq-kicker {
  display: inline-flex;
  width: fit-content;
  color: var(--faq-kicker-color);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  border: 1px solid rgba(0, 255, 157, 0.3);
  border-radius: var(--radius-pill);
  padding: 0.4rem 0.9rem;
  text-transform: uppercase;
}

.page-faq .faq-hero h1 {
  margin: 0.25rem 0 0.5rem;
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 900;
}

.page-faq .faq-hero .lead {
  margin: 0;
  max-width: 56rem;
  color: var(--color-muted);
  font-size: 1.0625rem;
  line-height: 1.8;
}

.page-faq .faq-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin: 0;
  padding: 0;
}

.page-faq .faq-hero-stats div {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-md);
  background: var(--faq-card-bg);
  backdrop-filter: blur(6px);
}

.page-faq .faq-hero-stats dt {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.page-faq .faq-hero-stats dd {
  margin: 0;
  font-size: 1.375rem;
  font-weight: 800;
  font-family: var(--font-serif), var(--font-sans), sans-serif;
}

/* 标签筛选 */
.page-faq .faq-filter-wrap {
  position: relative;
  margin-bottom: 1.75rem;
}

.page-faq .faq-filter-wrap > input[type="radio"] {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-filter-bar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.page-faq .faq-filter-bar label {
  cursor: pointer;
  border: 1px solid var(--faq-line);
  background: var(--faq-card-bg);
  color: var(--color-muted);
  border-radius: var(--radius-pill);
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-faq .faq-filter-wrap > #faq-filter-all:checked ~ .faq-filter-bar label[for="faq-filter-all"],
.page-faq .faq-filter-wrap > #faq-filter-login:checked ~ .faq-filter-bar label[for="faq-filter-login"],
.page-faq .faq-filter-wrap > #faq-filter-membership:checked ~ .faq-filter-bar label[for="faq-filter-membership"],
.page-faq .faq-filter-wrap > #faq-filter-library:checked ~ .faq-filter-bar label[for="faq-filter-library"],
.page-faq .faq-filter-wrap > #faq-filter-client:checked ~ .faq-filter-bar label[for="faq-filter-client"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
  box-shadow: var(--shadow-accent);
}

/* 主布局网格 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  align-items: start;
}

/* 侧边栏 */
.page-faq .faq-sidebar {
  order: -1;
}

.page-faq .faq-side-inner {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
  background: var(--faq-card-bg);
  padding: 1.25rem 1.25rem 1.35rem;
}

.page-faq .faq-side-label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  margin-bottom: 0.85rem;
  text-transform: uppercase;
}

.page-faq .faq-side-nav {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem 0.5rem;
}

.page-faq .faq-side-nav a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.875rem;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.page-faq .faq-side-nav a:hover {
  border-color: rgba(0, 255, 157, 0.3);
  background: rgba(0, 255, 157, 0.06);
}

.page-faq .faq-side-num {
  font-family: var(--font-serif), var(--font-sans), serif;
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.8125rem;
}

.page-faq .faq-side-help {
  border-top: 1px solid var(--faq-line);
  padding-top: 1rem;
}

.page-faq .faq-side-help-title {
  display: block;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.page-faq .faq-side-help p {
  font-size: 0.8125rem;
  color: var(--color-muted);
  line-height: 1.7;
  margin: 0 0 0.9rem;
}

/* 筛选时侧边栏高亮 */
.page-faq .faq-filter-wrap > #faq-filter-login:checked ~ .faq-layout .faq-side-nav a:not([href="#faq-section-login"]),
.page-faq .faq-filter-wrap > #faq-filter-membership:checked ~ .faq-layout .faq-side-nav a:not([href="#faq-section-membership"]),
.page-faq .faq-filter-wrap > #faq-filter-library:checked ~ .faq-layout .faq-side-nav a:not([href="#faq-section-library"]),
.page-faq .faq-filter-wrap > #faq-filter-client:checked ~ .faq-layout .faq-side-nav a:not([href="#faq-section-client"]) {
  opacity: 0.38;
}

/* 筛选隐藏非当前分区 */
.page-faq .faq-filter-wrap > #faq-filter-login:checked ~ .faq-layout .faq-section,
.page-faq .faq-filter-wrap > #faq-filter-membership:checked ~ .faq-layout .faq-section,
.page-faq .faq-filter-wrap > #faq-filter-library:checked ~ .faq-layout .faq-section,
.page-faq .faq-filter-wrap > #faq-filter-client:checked ~ .faq-layout .faq-section {
  display: none;
}

.page-faq .faq-filter-wrap > #faq-filter-login:checked ~ .faq-layout .faq-section[data-category="login"],
.page-faq .faq-filter-wrap > #faq-filter-membership:checked ~ .faq-layout .faq-section[data-category="membership"],
.page-faq .faq-filter-wrap > #faq-filter-library:checked ~ .faq-layout .faq-section[data-category="library"],
.page-faq .faq-filter-wrap > #faq-filter-client:checked ~ .faq-layout .faq-section[data-category="client"] {
  display: block;
}

/* 分区标题 */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-height) + 1.25rem);
  margin-bottom: 2.5rem;
}

.page-faq .faq-section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-bottom: 1.25rem;
}

.page-faq .faq-section-head h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-faq .faq-section-note {
  color: var(--color-muted);
  font-size: 0.8125rem;
  border: 1px solid var(--faq-line);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
}

/* 示意图 */
.page-faq .faq-figure {
  display: block;
  margin: 0 0 1.25rem;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 手风琴条目 */
.page-faq .faq-item {
  margin-bottom: 0.875rem;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-md);
  background: var(--faq-card-bg);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.page-faq .faq-item[open] {
  border-color: rgba(0, 255, 157, 0.35);
  background: rgba(0, 255, 157, 0.04);
  box-shadow: var(--shadow-accent);
}

.page-faq .faq-summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 1.2rem 1.4rem;
  cursor: pointer;
  user-select: none;
}

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

.page-faq .faq-summary::after {
  content: "+";
  margin-left: auto;
  color: var(--color-accent);
  font-size: 1.4rem;
  font-weight: 500;
  line-height: 1;
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.page-faq .faq-item[open] .faq-summary::after {
  content: "−";
}

.page-faq .faq-item-index {
  color: var(--color-accent);
  font-family: var(--font-serif), var(--font-sans), serif;
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.page-faq .faq-item-q {
  flex: 1;
  font-weight: 600;
  line-height: 1.5;
}

.page-faq .faq-item-tags {
  flex-shrink: 0;
}

/* 答案正文 */
.page-faq .faq-answer {
  padding: 0.25rem 1.5rem 1.25rem 3.35rem;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.85;
}

.page-faq .faq-answer p {
  margin-bottom: 0.75rem;
}

.page-faq .faq-answer ol,
.page-faq .faq-answer ul {
  margin: 0.5rem 0 0.85rem;
  padding-left: 1.3rem;
}

.page-faq .faq-answer li {
  margin-bottom: 0.45rem;
}

.page-faq .faq-answer-link a {
  color: var(--color-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(103, 232, 249, 0.35);
}

.page-faq .faq-feedback {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1.2rem;
  margin-top: 1.1rem;
  padding-top: 0.875rem;
  border-top: 1px dashed var(--faq-line);
  font-size: 0.8125rem;
}

.page-faq .faq-feedback a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
}

/* 会员权益对照卡 */
.page-faq .faq-benefit-compare {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.page-faq .benefit-card {
  position: relative;
  padding: 1.4rem 1.4rem 1.2rem;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-md);
  background: linear-gradient(150deg, rgba(30, 58, 138, 0.22), rgba(255, 255, 255, 0.02));
}

.page-faq .benefit-card--premium {
  border-color: rgba(255, 215, 0, 0.4);
  background: linear-gradient(150deg, rgba(255, 215, 0, 0.09), rgba(30, 58, 138, 0.1));
}

.page-faq .benefit-card-label {
  display: inline-block;
  font-weight: 800;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.page-faq .benefit-card--premium .benefit-card-label {
  color: var(--color-gold);
}

.page-faq .benefit-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
}

.page-faq .benefit-card ul {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.page-faq .benefit-card ul li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.page-faq .benefit-card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--color-accent);
}

.page-faq .benefit-card--premium ul li::before {
  background: var(--color-gold);
}

.page-faq .benefit-card-foot {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--color-muted);
  border-top: 1px dashed var(--faq-line);
  padding-top: 0.6rem;
}

/* 底部支持面板 */
.page-faq .faq-support-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: flex-start;
  margin-top: 1.5rem;
  padding: 1.6rem 1.5rem;
  border: 1px solid rgba(0, 255, 157, 0.22);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, rgba(0, 255, 157, 0.08), rgba(30, 58, 138, 0.18));
}

.page-faq .faq-support-tag {
  display: block;
  color: var(--color-accent);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.page-faq .faq-support-info h3 {
  margin: 0 0 0.5rem;
  font-size: 1.4rem;
}

.page-faq .faq-support-info p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.75;
  font-size: 0.9375rem;
  max-width: 44rem;
}

/* 中屏断点 */
@media (min-width: 720px) {
  .page-faq .faq-hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-faq .faq-benefit-compare {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-faq .faq-side-nav {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-support-panel {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* 桌面断点 */
@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 2.25rem;
  }

  .page-faq .faq-sidebar {
    order: 0;
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
  }

  .page-faq .faq-hero {
    padding: 2.5rem 3rem;
  }
}