/* ===== 帮助中心页 · 诊断面板 ===== */
.page-faq {
  --faq-grid: rgba(27, 58, 92, 0.16);
  --faq-border: rgba(168, 208, 230, 0.12);
  --faq-panel: rgba(13, 27, 42, 0.82);
  --faq-panel-soft: rgba(16, 34, 54, 0.66);
  --faq-green: #00FF88;
  --faq-gold: #FFC94D;
  background-color: var(--space-blue);
  background-image:
    linear-gradient(var(--faq-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-grid) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: center 0;
  padding-bottom: 72px;
}

.page-faq .faq-wrap {
  max-width: 1220px;
  margin-inline: auto;
  padding-inline: 20px;
}

/* 面包屑 */
.page-faq .faq-breadcrumbs {
  padding-top: 18px;
  padding-bottom: 4px;
}

.page-faq .breadcrumbs-list {
  display: flex;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel-gray);
}

.page-faq .breadcrumbs-item a {
  color: var(--light-blue);
  text-decoration: none;
  transition: color 0.24s var(--ease);
}

.page-faq .breadcrumbs-item a:hover {
  color: var(--neon-green);
}

.page-faq .faq-breadcrumbs-sep {
  color: var(--grid-blue);
  margin-left: 10px;
}

/* Hero */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-top: 40px;
  padding-bottom: 36px;
  align-items: center;
  position: relative;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 46%;
  height: 1px;
  background: linear-gradient(270deg, var(--faq-green), transparent);
  opacity: 0.32;
  pointer-events: none;
}

.page-faq .faq-hero-copy .eyebrow {
  display: inline-flex;
  margin-bottom: 18px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-title);
  font-size: 34px;
  font-weight: 800;
  font-style: italic;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 0 0 18px;
  text-transform: uppercase;
}

.page-faq .faq-hero-title-accent {
  display: block;
  margin-top: 6px;
  font-size: 0.58em;
  font-style: normal;
  font-weight: 700;
  color: var(--neon-green);
  letter-spacing: 0.02em;
}

.page-faq .faq-hero-lead {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--light-blue);
  max-width: 560px;
  margin: 0 0 24px;
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-faq .faq-hero-code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--steel-gray);
  padding: 4px 10px;
  border: 1px solid var(--faq-border);
  background: rgba(13, 27, 42, 0.6);
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

.page-faq .faq-hero-visual {
  position: relative;
  max-width: 260px;
}

.page-faq .faq-hero-visual .img-ratio {
  border: 1px solid var(--faq-border);
  background: var(--faq-panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .faq-hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0.92;
}

.page-faq .faq-hero-badge {
  position: absolute;
  right: -8px;
  bottom: -14px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--faq-panel-soft);
  border: 1px solid var(--faq-border);
  backdrop-filter: blur(8px);
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.page-faq .faq-hero-badge-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--faq-gold);
  line-height: 1;
}

.page-faq .faq-hero-badge-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--light-blue);
}

/* 搜索 */
.page-faq .faq-search {
  padding-block: 8px 28px;
}

.page-faq .faq-search-box {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--faq-panel);
  border: 1px solid var(--faq-border);
  padding: 10px 14px;
  transition: border-color 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-faq .faq-search-box:focus-within {
  border-color: var(--neon-green);
  box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.12);
}

.page-faq .faq-search-prefix {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--neon-green);
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid rgba(0, 255, 136, 0.3);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.page-faq .faq-search-input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--white);
  padding: 8px 0;
}

.page-faq .faq-search-input::placeholder {
  color: var(--steel-gray);
}

.page-faq .faq-search-count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--steel-gray);
  white-space: nowrap;
  display: none;
}

.page-faq .faq-search-empty {
  display: none;
  margin: 14px 0 0;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--light-blue);
  border-left: 2px solid var(--faq-gold);
  background: rgba(255, 201, 77, 0.06);
}

.page-faq .faq-search-empty.is-visible {
  display: block;
}

/* 诊断面板 */
.page-faq .faq-board {
  margin-top: 4px;
}

.page-faq .faq-board-nav {
  display: flex;
  gap: 0;
  overflow-x: auto;
  border-bottom: 1px solid var(--faq-border);
  margin-bottom: 26px;
  scrollbar-width: none;
}

.page-faq .faq-board-nav::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-board-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 650;
  color: var(--steel-gray);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-faq .faq-board-tab:hover {
  color: var(--white);
  background: rgba(168, 208, 230, 0.04);
}

.page-faq .faq-board-tab[aria-current="section"],
.page-faq .faq-board-tab.is-active {
  color: var(--neon-green);
  border-bottom-color: var(--neon-green);
  background: rgba(0, 255, 136, 0.04);
}

.page-faq .faq-board-tab-index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--faq-gold);
  letter-spacing: 0.06em;
}

/* 分组区段 */
.page-faq .faq-group {
  margin-bottom: 44px;
  padding-left: 0;
  border-left: 2px solid var(--faq-border);
  transition: border-color 0.3s var(--ease);
}

.page-faq .faq-group[data-section-active] {
  border-left-color: var(--neon-green);
}

.page-faq .faq-group-head {
  padding: 16px 0 12px 18px;
}

.page-faq .faq-group-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--neon-green);
  margin-bottom: 10px;
}

.page-faq .faq-group[data-section-target="cat-bigscreen"] .faq-group-tag .status-dot {
  background: var(--faq-gold);
}

.page-faq .faq-group[data-section-target="cat-bigscreen"] .faq-group-tag {
  color: var(--faq-gold);
}

.page-faq .faq-group[data-section-target="cat-data"] .faq-group-tag .status-dot {
  background: var(--light-blue);
}

.page-faq .faq-group[data-section-target="cat-data"] .faq-group-tag {
  color: var(--light-blue);
}

.page-faq .faq-group[data-section-target="cat-other"] .faq-group-tag .status-dot {
  background: var(--steel-gray);
}

.page-faq .faq-group[data-section-target="cat-other"] .faq-group-tag {
  color: var(--steel-gray);
}

.page-faq .faq-group-head h2 {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 800;
  font-style: italic;
  line-height: 1.2;
  color: var(--white);
  margin: 0 0 6px;
}

.page-faq .faq-group-head p {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel-gray);
  margin: 0;
  max-width: 480px;
}

.page-faq .faq-group-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-left: 18px;
}

/* FAQ 条目（details） */
.page-faq .faq-item {
  background: var(--faq-panel);
  border: 1px solid var(--faq-border);
  border-radius: 0;
  overflow: hidden;
  transition: border-color 0.26s var(--ease), background 0.26s var(--ease), transform 0.26s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(168, 208, 230, 0.26);
  background: var(--faq-panel-soft);
}

.page-faq .faq-item[open] {
  border-left: 2px solid var(--neon-green);
  border-color: rgba(0, 255, 136, 0.32);
}

.page-faq .faq-item[data-section-target="cat-bigscreen"][open],
.page-faq .faq-group[data-section-target="cat-bigscreen"] .faq-item[open] {
  border-left-color: var(--faq-gold);
}

.page-faq .faq-item summary {
  list-style: none;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 16px 16px 16px 14px;
  cursor: pointer;
}

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

.page-faq .faq-item-indicator {
  width: 8px;
  height: 8px;
  background: var(--neon-green);
  border-radius: 0;
  flex-shrink: 0;
  transition: transform 0.26s var(--ease), box-shadow 0.26s var(--ease);
}

.page-faq .faq-group[data-section-target="cat-bigscreen"] .faq-item-indicator {
  background: var(--faq-gold);
}

.page-faq .faq-group[data-section-target="cat-data"] .faq-item-indicator {
  background: var(--light-blue);
}

.page-faq .faq-group[data-section-target="cat-other"] .faq-item-indicator {
  background: var(--steel-gray);
}

.page-faq .faq-item[open] .faq-item-indicator {
  transform: scale(1.35);
  box-shadow: 0 0 12px rgba(0, 255, 136, 0.56);
}

.page-faq .faq-group[data-section-target="cat-bigscreen"] .faq-item[open] .faq-item-indicator {
  box-shadow: 0 0 12px rgba(255, 201, 77, 0.56);
}

.page-faq .faq-group[data-section-target="cat-data"] .faq-item[open] .faq-item-indicator {
  box-shadow: 0 0 12px rgba(168, 208, 230, 0.56);
}

.page-faq .faq-group[data-section-target="cat-other"] .faq-item[open] .faq-item-indicator {
  box-shadow: 0 0 12px rgba(92, 107, 122, 0.5);
}

.page-faq .faq-item-title {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 650;
  color: var(--white);
  line-height: 1.45;
  transition: color 0.22s var(--ease);
}

.page-faq .faq-item[open] .faq-item-title {
  color: var(--neon-green);
}

.page-faq .faq-group[data-section-target="cat-bigscreen"] .faq-item[open] .faq-item-title {
  color: var(--faq-gold);
}

.page-faq .faq-item-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel-gray);
  border: 1px solid var(--faq-border);
  padding: 3px 8px;
  white-space: nowrap;
}

.page-faq .faq-item-answer {
  border-top: 1px dashed var(--faq-border);
  padding: 0 16px;
  display: none;
}

.page-faq .faq-item[open] .faq-item-answer {
  display: block;
  padding-top: 14px;
  padding-bottom: 16px;
}

.page-faq .faq-item-answer p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.72;
  color: var(--light-blue);
  margin: 0;
}

.page-faq .faq-item-answer a {
  color: var(--neon-green);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-faq .faq-item-answer a:hover {
  color: var(--faq-gold);
}

/* 流程图解 */
.page-faq .faq-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-top: 32px;
  padding-bottom: 32px;
  align-items: center;
}

.page-faq .faq-flow-image .img-ratio {
  border: 1px solid var(--faq-border);
  background: var(--faq-panel);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
}

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

.page-faq .faq-flow-text .eyebrow {
  display: inline-flex;
  margin-bottom: 14px;
}

.page-faq .faq-flow-text h2 {
  font-family: var(--font-title);
  font-size: 26px;
  font-weight: 800;
  font-style: italic;
  color: var(--white);
  margin: 0 0 20px;
  letter-spacing: -0.01em;
}

.page-faq .faq-flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-faq .faq-flow-steps li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--light-blue);
}

.page-faq .faq-flow-step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--faq-gold);
  border-bottom: 1px solid rgba(255, 201, 77, 0.32);
  padding-bottom: 2px;
  flex-shrink: 0;
  min-width: 30px;
}

/* 底部引导 */
.page-faq .faq-bottom-cta {
  margin-top: 28px;
  padding: 42px 24px;
  text-align: center;
  background: var(--faq-panel);
  border: 1px solid var(--faq-border);
  position: relative;
  overflow: hidden;
}

.page-faq .faq-bottom-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--faq-green), var(--faq-gold), transparent);
  opacity: 0.7;
}

.page-faq .faq-bottom-cta h2 {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 800;
  font-style: italic;
  color: var(--white);
  margin: 0 0 10px;
}

.page-faq .faq-bottom-cta p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--light-blue);
  margin: 0 auto 24px;
  max-width: 480px;
}

.page-faq .faq-bottom-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.page-faq .faq-bottom-actions .btn {
  min-width: 136px;
  justify-content: center;
}

/* 状态点 */
.page-faq .status-dot {
  background: var(--neon-green);
  box-shadow: 0 0 8px rgba(0, 255, 136, 0.5);
}

/* 图片容器通用 */
.page-faq .img-ratio {
  position: relative;
  overflow: hidden;
}

.page-faq .img-ratio[data-ratio="square"] {
  aspect-ratio: 1 / 1;
  max-height: 260px;
}

.page-faq .img-ratio[data-ratio="wide"] {
  aspect-ratio: 3 / 2;
  max-height: 420px;
}

/* 移动端做细节修正 */
@media (max-width: 767px) {
  .page-faq .faq-hero {
    padding-top: 28px;
    gap: 26px;
  }

  .page-faq .faq-hero h1 {
    font-size: 28px;
  }

  .page-faq .faq-hero-visual {
    max-width: 200px;
    margin-inline: auto;
  }

  .page-faq .faq-hero-badge {
    right: -4px;
    bottom: -10px;
    padding: 8px 12px;
  }

  .page-faq .faq-search-input {
    font-size: 14px;
  }

  .page-faq .faq-item summary {
    grid-template-columns: auto 1fr;
  }

  .page-faq .faq-item-tag {
    display: none;
  }

  .page-faq .faq-group-list {
    padding-left: 12px;
  }

  .page-faq .faq-flow {
    gap: 22px;
    padding-top: 24px;
  }

  .page-faq .faq-bottom-cta {
    padding: 32px 18px;
  }

  .page-faq .faq-bottom-actions .btn {
    min-width: 100%;
  }
}

/* 中等屏 */
@media (min-width: 768px) {
  .page-faq .faq-hero {
    grid-template-columns: 1fr 240px;
  }

  .page-faq .faq-hero h1 {
    font-size: 40px;
  }

  .page-faq .faq-hero-title-accent {
    font-size: 0.5em;
  }

  .page-faq .faq-search-box {
    padding: 12px 20px;
  }

  .page-faq .faq-search-count {
    display: inline-block;
  }

  .page-faq .faq-board-tab {
    padding: 14px 20px;
    font-size: 15px;
  }

  .page-faq .faq-group-head h2 {
    font-size: 28px;
  }

  .page-faq .faq-group-head p {
    font-size: 14px;
  }

  .page-faq .faq-item-title {
    font-size: 15px;
  }

  .page-faq .faq-item-answer p {
    font-size: 14px;
  }

  .page-faq .faq-flow {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-faq .faq-flow-text h2 {
    font-size: 30px;
  }
}

/* 桌面端 */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    grid-template-columns: 1fr 280px;
    padding-top: 56px;
  }

  .page-faq .faq-hero h1 {
    font-size: 48px;
  }

  .page-faq .faq-hero-lead {
    font-size: 16px;
  }

  .page-faq .faq-board-nav {
    border-bottom: none;
    border-right: 1px solid var(--faq-border);
    flex-direction: column;
    width: 220px;
    margin-bottom: 0;
    margin-right: 28px;
    flex-shrink: 0;
    overflow: visible;
  }

  .page-faq .faq-board {
    display: flex;
    align-items: flex-start;
  }

  .page-faq .faq-board-tab {
    border-bottom: none;
    border-right: 2px solid transparent;
    border-left: 2px solid transparent;
    padding: 14px 18px;
  }

  .page-faq .faq-board-tab[aria-current="section"],
  .page-faq .faq-board-tab.is-active {
    color: var(--neon-green);
    border-right-color: var(--neon-green);
    border-left-color: var(--neon-green);
    background: rgba(0, 255, 136, 0.04);
  }

  .page-faq .faq-board-content {
    flex: 1;
    min-width: 0;
  }

  .page-faq .faq-group {
    margin-bottom: 36px;
  }
}