.page-faq {
  --faq-accent-alpha: rgba(0, 255, 135, 0.1);
  --faq-orange-alpha: rgba(255, 106, 0, 0.12);
  --faq-tag-width: 14px;
  background: var(--bg-deep);
  overflow-x: clip;
}

/* ===== Hero 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + var(--space-xl)) var(--gutter) var(--space-2xl);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    radial-gradient(800px 400px at 75% 10%, rgba(0, 255, 135, 0.07), transparent 65%),
    var(--bg-deep);
  background-size: 48px 48px, 48px 48px, auto, auto;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: var(--header-h);
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 55%, transparent 100%);
  clip-path: polygon(0 0, 100% 0, calc(100% - 160px) 100%, 0 100%);
  opacity: 0.75;
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  display: grid;
  gap: var(--space-xl);
  align-items: center;
}

.page-faq .faq-hero-content {
  max-width: 640px;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: var(--space-md);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: 0.01em;
  color: var(--text);
  margin: 0.35rem 0 var(--space-md);
  text-transform: uppercase;
}

.page-faq .faq-hero-desc {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
  margin: 0 0 var(--space-lg);
}

.page-faq .faq-search-box {
  position: relative;
  max-width: 560px;
}

.page-faq .faq-search-box::before {
  content: "";
  position: absolute;
  left: 1rem;
  top: 50%;
  width: 14px;
  height: 14px;
  border: 2px solid var(--muted);
  border-radius: 50%;
  transform: translateY(-70%);
  pointer-events: none;
  z-index: 1;
}

.page-faq .faq-search-box::after {
  content: "";
  position: absolute;
  left: calc(1rem + 10px);
  top: calc(50% + 5px);
  width: 6px;
  height: 2px;
  background: var(--muted);
  transform: rotate(45deg);
  pointer-events: none;
  z-index: 1;
}

.page-faq .faq-search-input {
  width: 100%;
  background: rgba(16, 42, 74, 0.72);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 0.9rem 1.1rem 0.9rem 2.75rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.page-faq .faq-search-input::placeholder {
  color: rgba(143, 168, 192, 0.65);
}

.page-faq .faq-search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 255, 135, 0.14);
  background: rgba(16, 42, 74, 0.92);
}

.page-faq .faq-hint {
  margin: var(--space-sm) 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.page-faq .faq-hint-link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dashed rgba(0, 255, 135, 0.4);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-faq .faq-hint-link:hover {
  color: var(--text);
  border-bottom-color: var(--accent);
}

.page-faq .faq-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: var(--space-lg);
  max-width: 560px;
}

.page-faq .faq-stat {
  background: rgba(8, 23, 46, 0.88);
  padding: 0.65rem 1rem;
}

.page-faq .faq-stat dt {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.2rem;
}

.page-faq .faq-stat dd {
  margin: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--accent);
  line-height: 1.2;
}

.page-faq .faq-hero-media {
  width: 100%;
  max-width: 640px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.3);
  justify-self: center;
}

/* ===== 章节头部 ===== */
.page-faq .faq-section,
.page-faq .faq-guide-section,
.page-faq .faq-support-section {
  padding: var(--space-2xl) var(--gutter);
}

.page-faq .faq-section {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-guide-section {
  background: linear-gradient(180deg, rgba(8, 23, 46, 0.25), transparent 40%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-support-section {
  background:
    radial-gradient(600px 320px at 80% 40%, rgba(0, 255, 135, 0.045), transparent 70%),
    linear-gradient(180deg, var(--bg-deep), var(--bg-dark));
}

.page-faq .faq-section-head {
  position: relative;
  padding-left: 3.2rem;
  max-width: 720px;
}

.page-faq .faq-section-head .section-index {
  position: absolute;
  left: 0;
  top: 0.1rem;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 2.1rem;
  line-height: 1;
  color: var(--accent);
  opacity: 0.55;
}

.page-faq .faq-section-head .section-title {
  font-size: clamp(1.8rem, 3.6vw, 2.8rem);
  margin: 0.25rem 0 0.5rem;
}

.page-faq .faq-section-desc {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
}

.page-faq .faq-section-desc a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 255, 135, 0.3);
}

/* ===== FAQ 时间线 ===== */
.page-faq .faq-timeline {
  position: relative;
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.page-faq .faq-timeline-line {
  display: none;
}

.page-faq .faq-item {
  position: relative;
  display: grid;
  gap: 0.4rem;
  justify-items: start;
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.page-faq .faq-index {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: rgba(0, 255, 135, 0.07);
  padding: 0.2rem 0.55rem;
  border: 1px solid rgba(0, 255, 135, 0.22);
  border-radius: 3px;
}

.page-faq .faq-card {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.page-faq .faq-card:hover {
  border-color: rgba(0, 255, 135, 0.45);
  background: rgba(16, 42, 74, 0.92);
}

.page-faq .faq-card[open] {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(0, 255, 135, 0.2), 0 18px 42px rgba(0, 0, 0, 0.22);
}

.page-faq .faq-card summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem 0.75rem;
  padding: 1.05rem 1.2rem;
}

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

.page-faq .faq-card summary::marker {
  content: "";
}

.page-faq .faq-q-marker {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--accent);
  flex-shrink: 0;
  line-height: 1;
  transition: transform 0.3s ease, color 0.3s ease;
}

.page-faq .faq-card:hover .faq-q-marker,
.page-faq .faq-card:focus-within .faq-q-marker {
  transform: rotate(-10deg) scale(1.15);
  color: var(--text);
}

.page-faq .faq-question-text {
  flex: 1 1 180px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin: 0;
  line-height: 1.45;
  transition: color 0.2s ease;
}

.page-faq .faq-card[open] .faq-question-text {
  color: var(--accent);
}

.page-faq .faq-card-tag {
  flex-shrink: 0;
}

.page-faq .faq-toggle-icon {
  position: relative;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-left: 0.25rem;
  transition: transform 0.3s ease;
}

.page-faq .faq-toggle-icon::before,
.page-faq .faq-toggle-icon::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: background 0.2s ease, transform 0.3s ease;
}

.page-faq .faq-toggle-icon::before {
  top: 8px;
  left: 0;
  right: 0;
  height: 2px;
}

.page-faq .faq-toggle-icon::after {
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
}

.page-faq .faq-card:hover .faq-toggle-icon::before,
.page-faq .faq-card:hover .faq-toggle-icon::after,
.page-faq .faq-card[open] .faq-toggle-icon::before {
  background: var(--accent);
}

.page-faq .faq-card[open] .faq-toggle-icon {
  transform: rotate(45deg);
}

.page-faq .faq-card[open] .faq-toggle-icon::after {
  transform: scaleY(0);
}

.page-faq .faq-card summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
  border-radius: var(--radius);
}

.page-faq .faq-card summary:focus-visible .faq-question-text {
  color: var(--accent);
}

.page-faq .faq-answer {
  padding: 0 1.2rem 1.2rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.7;
}

.page-faq .faq-answer p {
  margin: 0.85rem 0 0;
}

.page-faq .faq-answer strong {
  color: var(--text);
  font-weight: 600;
}

/* ===== FAQ 底部引导 ===== */
.page-faq .faq-more-box {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: flex-start;
  margin-top: var(--space-xl);
  padding: var(--space-lg);
  background: linear-gradient(135deg, rgba(255, 106, 0, 0.12), rgba(16, 42, 74, 0.4));
  border: 1px solid rgba(255, 106, 0, 0.3);
  border-radius: var(--radius);
}

.page-faq .faq-more-box p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.page-faq .faq-more-box strong {
  color: var(--text);
}

/* ===== 使用指南 ===== */
.page-faq .guide-grid {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.page-faq .guide-card {
  position: relative;
  background: linear-gradient(160deg, var(--panel) 0%, rgba(16, 42, 74, 0.45) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-lg);
  overflow: hidden;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-faq .guide-card:hover {
  border-color: rgba(0, 255, 135, 0.4);
  transform: translateY(-3px);
}

.page-faq .guide-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
}

.page-faq .guide-card--filter::before {
  background: var(--accent-2);
}

.page-faq .guide-card-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-md);
  border-bottom: 1px dashed var(--line);
}

.page-faq .guide-card-head h3 {
  flex: 1 1 160px;
  margin: 0;
  font-size: 1.1rem;
  color: var(--text);
}

.page-faq .guide-step-num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--accent);
}

.page-faq .guide-card--filter .guide-step-num {
  color: var(--accent-2);
}

.page-faq .guide-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-faq .guide-steps li {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
}

.page-faq .step-dot {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 255, 135, 0.14);
  margin-top: 0.38rem;
}

.page-faq .guide-card--filter .step-dot {
  background: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(255, 106, 0, 0.14);
}

.page-faq .guide-steps p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.65;
}

/* ===== 人工支持 ===== */
.page-faq .support-grid {
  display: grid;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
  align-items: start;
}

.page-faq .support-cards {
  display: grid;
  gap: var(--space-md);
}

.page-faq .support-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 1rem;
  align-items: start;
  padding: 1.25rem;
  background: rgba(16, 42, 74, 0.6);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.page-faq .support-card:hover {
  border-color: rgba(0, 255, 135, 0.5);
  background: rgba(16, 42, 74, 0.92);
  transform: translateX(5px);
}

.page-faq .support-card:nth-child(2) {
  border-left-color: var(--accent-2);
}

.page-faq .support-card:nth-child(2):hover {
  border-color: rgba(255, 106, 0, 0.5);
}

.page-faq .support-card:nth-child(3) {
  border-left-color: var(--muted);
}

.page-faq .support-card:nth-child(3):hover {
  border-color: rgba(143, 168, 192, 0.5);
}

.page-faq .support-card-icon {
  grid-row: 1 / span 3;
  width: 40px;
  height: 40px;
  padding: 10px;
  background: rgba(0, 255, 135, 0.1);
  color: var(--accent);
  border-radius: 10px;
  box-sizing: border-box;
}

.page-faq .support-card:nth-child(2) .support-card-icon {
  background: rgba(255, 106, 0, 0.12);
  color: var(--accent-2);
}

.page-faq .support-card:nth-child(3) .support-card-icon {
  background: rgba(143, 168, 192, 0.1);
  color: var(--muted);
}

.page-faq .support-card-body {
  min-width: 0;
}

.page-faq .support-kicker {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.15rem;
}

.page-faq .support-card-body h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
  color: var(--text);
}

.page-faq .support-card-body p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}

.page-faq .support-email {
  display: inline-block;
  margin-top: 0.45rem;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent);
  overflow-wrap: break-word;
  word-break: break-word;
}

.page-faq .support-card:nth-child(2) .support-email {
  color: var(--accent-2);
}

.page-faq .support-note {
  font-size: 0.82rem;
  color: rgba(143, 168, 192, 0.8);
}

.page-faq .support-media {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
}

.page-faq .support-more {
  margin: var(--space-xl) 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.page-faq .support-more a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 255, 135, 0.3);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .support-more a:hover {
  color: var(--text);
  border-color: var(--accent);
}

/* ===== 桌面时间线：中心轴线互斥布局 ===== */
@media (min-width: 780px) {
  .page-faq .faq-timeline {
    padding-block: var(--space-sm);
  }

  .page-faq .faq-timeline-line {
    display: block;
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    transform: translateX(-50%);
    background-image: repeating-linear-gradient(
      to bottom,
      var(--line) 0 6px,
      transparent 6px 14px
    );
    opacity: 0.6;
  }

  .page-faq .faq-item {
    width: calc(50% - 2.5rem);
  }

  .page-faq .faq-item:nth-child(odd) {
    margin-right: auto;
  }

  .page-faq .faq-item:nth-child(even) {
    margin-left: auto;
  }

  .page-faq .faq-item:nth-child(odd) .faq-card::after {
    content: "";
    position: absolute;
    right: -18px;
    top: 22px;
    width: 18px;
    height: 2px;
    background: linear-gradient(to right, var(--line), var(--accent));
  }

  .page-faq .faq-item:nth-child(even) .faq-card::after {
    content: "";
    position: absolute;
    left: -18px;
    top: 22px;
    width: 18px;
    height: 2px;
    background: linear-gradient(to left, var(--line), var(--accent));
  }
}

/* ===== 桌面栅格增强 ===== */
@media (min-width: 880px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .page-faq .faq-hero-media {
    justify-self: end;
  }

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

  .page-faq .support-grid {
    grid-template-columns: 1fr 0.85fr;
  }

  .page-faq .support-cards {
    gap: var(--space-md);
  }

  .page-faq .support-media {
    position: sticky;
    top: calc(var(--header-h) + 1rem);
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-hero {
    padding-top: calc(var(--header-h) + 4.5rem);
  }
}

/* ===== 动态偏好 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition: none !important;
    transform: none !important;
  }
}