/* ===== 帮助中心 / 常见问题 · page-faq ===== */
.page-faq {
  --faq-max: 1220px;
  --faq-gap: 20px;
  --faq-radius: 10px;
  background: var(--space-deep-1000);
  color: var(--metal-silver-200);
  font-family: var(--font-body);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  background: var(--space-deep-1000);
  border-bottom: 1px solid rgba(112, 128, 144, 0.3);
}

.page-faq .breadcrumb .container {
  display: flex;
  align-items: center;
  padding-top: 14px;
  padding-bottom: 14px;
  font-size: 14px;
}

.page-faq .breadcrumb a {
  color: var(--steel-silver-400);
  text-decoration: none;
  transition: color 200ms var(--ease-out);
}

.page-faq .breadcrumb a:hover {
  color: var(--neon-green-500);
}

.page-faq .breadcrumb .breadcrumb__sep {
  color: var(--slate-500);
  margin: 0 10px;
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--metal-silver-200);
  font-weight: 600;
}

/* ---------- Hero 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 48px 0 32px;
  background: linear-gradient(120deg, rgba(14, 35, 52, 0.55) 0%, rgba(9, 27, 38, 0) 64%), var(--space-deep-1000);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: 6%;
  right: -7%;
  width: 44%;
  height: 74%;
  background: linear-gradient(155deg, rgba(215, 255, 70, 0.2) 0%, rgba(22, 50, 74, 0.75) 46%, rgba(9, 27, 38, 0) 100%);
  clip-path: polygon(12% 0, 100% 0, 88% 100%, 0 100%);
  transform: skew(-6deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  left: -5%;
  bottom: -6%;
  width: 38%;
  height: 40%;
  background:
    repeating-linear-gradient(135deg, transparent 0 10px, rgba(215, 255, 70, 0.06) 10px 12px),
    repeating-linear-gradient(135deg, transparent 0 46px, rgba(255, 255, 255, 0.04) 46px 48px);
  transform: skew(-8deg);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: 32px;
  z-index: 1;
}

.page-faq .faq-hero__content,
.page-faq .faq-hero__panel {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .display-title {
  margin: 8px 0 16px;
  font-size: clamp(24px, 6.2vw, 56px);
  line-height: 1.12;
  color: var(--metal-silver-200);
}

.page-faq .faq-hero .lead {
  max-width: 660px;
  margin: 0;
  color: var(--steel-silver-400);
  font-size: 16px;
  line-height: 1.8;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 200ms var(--ease-out);
}

.page-faq .btn--primary {
  background: var(--neon-green-500);
  color: #091B26;
}

.page-faq .btn--primary:hover {
  background: var(--neon-green-300);
  transform: translateY(-1px);
}

.page-faq .btn--ghost {
  border: 1px solid var(--slate-500);
  color: var(--metal-silver-200);
}

.page-faq .btn--ghost:hover {
  border-color: var(--neon-green-500);
  color: var(--neon-green-500);
}

.page-faq .faq-hero__panel {
  background: var(--space-deep-800);
  border-left: 3px solid var(--neon-green-500);
  border-radius: var(--faq-radius);
  padding: 22px 24px 20px;
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.22);
}

.page-faq .faq-hero__panel-head {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--neon-green-500);
  text-transform: uppercase;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(112, 128, 144, 0.35);
  margin-bottom: 14px;
}

.page-faq .faq-hero__stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
}

.page-faq .faq-hero__stat-num {
  font-family: var(--font-data);
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 700;
  color: var(--metal-silver-200);
}

.page-faq .faq-hero__stat-label {
  color: var(--steel-silver-400);
  font-size: 14px;
}

.page-faq .faq-hero__panel-note {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px solid rgba(112, 128, 144, 0.35);
  color: var(--steel-silver-400);
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- 统计快照条 ---------- */
.page-faq .faq-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 18px;
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid rgba(112, 128, 144, 0.3);
}

.page-faq .faq-stats__item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--steel-silver-400);
  font-size: 13px;
  line-height: 1.5;
}

.page-faq .faq-stats__item .data-tag {
  flex: 0 0 auto;
  min-width: 52px;
  text-align: center;
  font-size: 13px;
}

/* ---------- 粘性锚点索引 ---------- */
.page-faq .faq-toc {
  position: sticky;
  top: var(--header-h);
  z-index: 30;
  background: rgba(9, 27, 38, 0.94);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(215, 255, 70, 0.18);
  border-bottom: 1px solid rgba(112, 128, 144, 0.3);
}

.page-faq .faq-toc__list {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 10px 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

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

.page-faq .faq-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--steel-silver-400);
  text-decoration: none;
  font-size: 14px;
  transition: all 200ms var(--ease-out);
}

.page-faq .faq-toc__link:hover {
  color: var(--neon-green-500);
  border-color: rgba(215, 255, 70, 0.4);
}

.page-faq .faq-toc__num {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--neon-green-500);
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-h) + 28px);
  padding: 56px 5vw;
}

.page-faq .faq-section--alt {
  background: linear-gradient(180deg, rgba(14, 35, 52, 0.55) 0%, rgba(9, 27, 38, 0) 140px);
}

.page-faq .faq-section__inner {
  max-width: var(--faq-max);
  margin: 0 auto;
}

.page-faq .faq-section__header {
  margin-bottom: 28px;
}

.page-faq .faq-section__header .section-title {
  margin: 8px 0 12px;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.1;
}

.page-faq .faq-section__header .lead {
  max-width: 680px;
  margin: 0;
  color: var(--steel-silver-400);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 排查步骤 ---------- */
.page-faq .trouble-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .trouble-step {
  position: relative;
  display: flex;
  gap: 16px;
  padding: 20px 18px;
  margin-bottom: 14px;
  background: var(--space-deep-900);
  border: 1px solid rgba(112, 128, 144, 0.32);
  border-radius: var(--faq-radius);
  transition: border-color 200ms var(--ease-out), background-color 200ms var(--ease-out);
}

.page-faq .trouble-step:hover {
  border-color: rgba(215, 255, 70, 0.5);
}

.page-faq .trouble-step__num {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--neon-green-500);
  color: #091B26;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 14px;
}

.page-faq .trouble-step__body {
  min-width: 0;
}

.page-faq .trouble-step__body h3 {
  margin: 2px 0 6px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--metal-silver-200);
}

.page-faq .trouble-step__body p {
  margin: 0;
  color: var(--steel-silver-400);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .trouble-step__body p a {
  color: var(--neon-green-500);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-faq .trouble-step--expandable {
  display: block;
  padding: 0;
  overflow: hidden;
}

.page-faq .trouble-step--expandable details[open] {
  background:
    repeating-linear-gradient(135deg, transparent 0 12px, rgba(215, 255, 70, 0.03) 12px 14px),
    var(--space-deep-900);
}

.page-faq .trouble-step--expandable summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  color: var(--metal-silver-200);
}

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

.page-faq .trouble-step--expandable .trouble-step__body {
  padding: 0 18px 20px 74px;
}

/* ---------- 图片容器 ---------- */
.page-faq .faq-figure {
  margin: 24px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--faq-radius);
  border: 1px solid rgba(112, 128, 144, 0.32);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--neon-green-500);
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--steel-silver-400);
}

/* ---------- 兼容矩阵 ---------- */
.page-faq .compat-grid {
  display: grid;
  gap: 20px;
}

.page-faq .compat-table-wrap {
  min-width: 0;
  overflow-x: auto;
}

.page-faq .data-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .data-table caption {
  text-align: left;
  padding-bottom: 8px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--neon-green-500);
}

.page-faq .data-table th,
.page-faq .data-table td {
  border: 1px solid rgba(112, 128, 144, 0.32);
  padding: 10px 12px;
  text-align: left;
  vertical-align: middle;
}

.page-faq .data-table thead th {
  background: var(--space-deep-800);
  color: var(--metal-silver-200);
  font-weight: 600;
  white-space: nowrap;
}

.page-faq .data-table tbody tr:hover {
  background: rgba(22, 50, 74, 0.5);
}

.page-faq .data-table .badge {
  white-space: nowrap;
}

/* ---------- 推荐组合卡片 ---------- */
.page-faq .recommend-grid {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-faq .recommend-grid .card {
  margin: 0;
  background: var(--space-deep-900);
  border: 1px solid rgba(112, 128, 144, 0.32);
  border-radius: var(--faq-radius);
  padding: 20px;
  transition: border-color 200ms var(--ease-out), transform 200ms var(--ease-out);
}

.page-faq .recommend-grid .card:hover {
  border-color: var(--neon-green-500);
  transform: translateY(-2px);
}

.page-faq .recommend-grid .card__title {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--metal-silver-200);
}

.page-faq .recommend-grid .card__text {
  margin: 0;
  color: var(--steel-silver-400);
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- FAQ 手风琴 ---------- */
.page-faq .faq-accordion {
  display: grid;
  gap: 12px;
}

.page-faq .faq-accordion__item {
  background: var(--space-deep-900);
  border: 1px solid rgba(112, 128, 144, 0.32);
  border-radius: var(--faq-radius);
  transition: border-color 200ms var(--ease-out), background-color 200ms var(--ease-out);
}

.page-faq .faq-accordion__item[open] {
  border-color: rgba(215, 255, 70, 0.72);
  background:
    linear-gradient(135deg, rgba(215, 255, 70, 0.06) 0%, rgba(9, 27, 38, 0) 46%),
    var(--space-deep-900);
}

.page-faq .faq-accordion__item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  color: var(--metal-silver-200);
}

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

.page-faq .faq-accordion__title {
  min-width: 0;
  font-size: 16px;
  line-height: 1.5;
}

.page-faq .faq-accordion__icon {
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(215, 255, 70, 0.1);
  border: 1px solid rgba(215, 255, 70, 0.4);
  color: var(--neon-green-500);
  font-family: var(--font-data);
  font-size: 16px;
  font-weight: 700;
  transition: transform 200ms var(--ease-out);
}

.page-faq .faq-accordion__icon::before {
  content: "+";
  line-height: 1;
}

.page-faq .faq-accordion__item[open] .faq-accordion__icon {
  transform: rotate(45deg);
}

.page-faq .faq-accordion__body {
  padding: 0 20px 18px;
}

.page-faq .faq-accordion__body p {
  margin: 0 0 8px;
  color: var(--steel-silver-400);
  font-size: 15px;
  line-height: 1.7;
}

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

.page-faq .faq-accordion__body a {
  color: var(--neon-green-500);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- 数据核验卡片 ---------- */
.page-faq .verify-grid {
  display: grid;
  gap: 14px;
}

.page-faq .verify-card {
  background: var(--space-deep-900);
  border: 1px solid rgba(112, 128, 144, 0.32);
  border-radius: var(--faq-radius);
  padding: 22px;
  transition: border-color 200ms var(--ease-out);
}

.page-faq .verify-card:hover {
  border-color: rgba(215, 255, 70, 0.5);
}

.page-faq .verify-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  color: var(--metal-silver-200);
}

.page-faq .verify-card p {
  margin: 0 0 10px;
  color: var(--steel-silver-400);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .verify-card p:last-child {
  margin-bottom: 0;
}

/* ---------- 联系面板 ---------- */
.page-faq .contact-panel {
  display: grid;
  gap: 22px;
  background:
    linear-gradient(160deg, rgba(215, 255, 70, 0.06) 0%, rgba(9, 27, 38, 0) 50%),
    var(--space-deep-900);
  border: 1px solid rgba(215, 255, 70, 0.3);
  border-radius: var(--faq-radius);
  padding: 28px 22px;
}

.page-faq .contact-panel__label {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--neon-green-500);
}

.page-faq .contact-panel__email {
  display: block;
  width: 100%;
  padding: 12px 16px;
  margin-bottom: 16px;
  box-sizing: border-box;
  background: rgba(9, 27, 38, 0.72);
  border-left: 3px solid var(--neon-green-500);
  border-radius: 6px;
  font-family: var(--font-data);
  font-size: clamp(17px, 3.4vw, 28px);
  font-weight: 700;
  color: var(--metal-silver-200);
  word-break: break-all;
}

.page-faq .contact-panel__hint {
  margin: 10px 0 0;
  color: var(--steel-silver-400);
  font-size: 13px;
}

.page-faq .contact-panel__note {
  color: var(--steel-silver-400);
  font-size: 15px;
}

.page-faq .contact-panel__note p {
  margin: 0 0 10px;
  line-height: 1.75;
}

.page-faq .contact-panel__note p:last-child {
  margin-bottom: 0;
}

.page-faq .contact-panel__note a {
  color: var(--neon-green-500);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-faq .contact-panel__warn {
  color: var(--signal-amber);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 修复记录浮动小窗 ---------- */
.page-faq .repair-float {
  display: none;
}

/* ---------- 响应式增强 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-faq .recommend-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-faq .verify-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 64px 0 44px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
    gap: 40px;
    align-items: center;
  }

  .page-faq .faq-hero .display-title {
    font-size: clamp(32px, 5vw, 56px);
  }

  .page-faq .faq-section {
    padding: 72px 5vw;
  }

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

  .page-faq .compat-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-faq .contact-panel {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 32px;
    padding: 36px 40px;
  }
}

@media (min-width: 1200px) {
  .page-faq .repair-float {
    display: block;
    position: fixed;
    right: 24px;
    bottom: 96px;
    z-index: 45;
    width: 248px;
    background: var(--space-deep-800);
    border: 1px solid rgba(215, 255, 70, 0.4);
    border-radius: 10px;
    padding: 16px 18px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(6px);
  }

  .page-faq .repair-float__title {
    margin: 10px 0 6px;
    font-size: 16px;
    font-weight: 700;
    color: var(--metal-silver-200);
  }

  .page-faq .repair-float__text {
    margin: 0 0 10px;
    font-size: 13px;
    line-height: 1.65;
    color: var(--steel-silver-400);
  }

  .page-faq .repair-float__link {
    font-family: var(--font-data);
    font-size: 13px;
    color: var(--neon-green-500);
    text-decoration: underline;
    text-underline-offset: 4px;
  }

  .page-faq .repair-float__link:hover {
    color: var(--neon-green-300);
  }
}

@media (min-width: 1400px) {
  .page-faq #faq-contact .faq-section__inner {
    padding-right: 280px;
  }

  .page-faq #faq-contact .contact-panel {
    margin-right: 0;
  }
}