/* ========== 支持中心 FAQ 页面专属样式 ========== */

.page-faq {
  --faq-accent: var(--neon-green);
  --faq-link: var(--electric-blue);
  --faq-bg: var(--space-blue);
  --faq-panel: var(--paper);
  --faq-ink: var(--ink);
  --faq-graphite: var(--graphite);
  --faq-mist: var(--mist);
  --faq-red: var(--signal-red);
  background-color: var(--faq-bg);
  color: var(--faq-panel);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-faq__shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px 20px 72px;
}

/* ---- 面包屑 ---- */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  margin-bottom: 28px;
}

.page-faq .breadcrumb__link {
  color: var(--faq-link);
  text-decoration: none;
  transition: color var(--tr);
}

.page-faq .breadcrumb__link:hover {
  color: var(--faq-accent);
}

.page-faq .breadcrumb__separator {
  color: var(--faq-mist);
}

.page-faq .breadcrumb__current {
  color: var(--faq-mist);
}

/* ---- 页头 ---- */
.page-faq__head {
  position: relative;
  padding: 28px 0 36px;
  border-top: 4px solid var(--faq-accent);
  border-bottom: 2px solid rgba(209, 213, 219, 0.25);
}

.page-faq__head::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 160px;
  height: 160px;
  background: linear-gradient(135deg, transparent 50%, rgba(0, 255, 163, 0.12) 50%);
  pointer-events: none;
}

.page-faq__kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--faq-accent);
  margin-bottom: 14px;
}

.page-faq__title {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.25;
  font-weight: 800;
  margin: 0 0 18px;
  color: var(--faq-panel);
}

.page-faq__lede {
  max-width: 760px;
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(245, 241, 232, 0.85);
}

/* ---- 统计卡 ---- */
.page-faq__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 28px 0 44px;
}

.page-faq__stat {
  background: var(--faq-panel);
  color: var(--faq-ink);
  border: 2px solid var(--faq-ink);
  box-shadow: var(--shadow-card);
  padding: 18px 20px;
  transform: rotate(-0.5deg);
  transition: transform var(--tr), box-shadow var(--tr);
}

.page-faq__stat:nth-child(even) {
  transform: rotate(0.5deg);
}

.page-faq__stat:hover {
  transform: rotate(0deg) translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.35);
}

.page-faq__stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1.1;
  font-weight: 800;
  color: var(--faq-ink);
}

.page-faq__stat-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--faq-graphite);
}

/* ---- 主布局 ---- */
.page-faq__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

/* ---- 左侧索引 ---- */
.page-faq__index {
  position: relative;
  padding: 24px;
  background: var(--faq-graphite);
  border: 2px solid rgba(245, 241, 232, 0.2);
  box-shadow: var(--shadow-panel);
}

.page-faq__index-title {
  font-family: var(--font-mono);
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--faq-accent);
  margin: 0 0 18px;
}

.page-faq__index-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
}

.page-faq__index-list li {
  margin-bottom: 6px;
}

.page-faq__index-list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  color: var(--faq-panel);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 14px;
  border-left: 3px solid transparent;
  transition: background-color var(--tr), border-color var(--tr), color var(--tr);
}

.page-faq__index-list a:hover,
.page-faq__index-list a:focus-visible {
  background: rgba(0, 255, 163, 0.1);
  border-left-color: var(--faq-accent);
  color: var(--faq-accent);
  outline: none;
}

.page-faq__index-num {
  font-size: 12px;
  font-weight: 800;
  color: var(--faq-accent);
  opacity: 0.9;
}

.page-faq__contact-card {
  border: 1px solid rgba(245, 241, 232, 0.22);
  padding: 18px;
  background: rgba(245, 241, 232, 0.06);
}

.page-faq__contact-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faq-accent);
  margin: 0 0 8px;
}

.page-faq__contact-mail {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--faq-accent);
  text-decoration: none;
  border-bottom: 1px dashed currentColor;
  word-break: break-all;
}

.page-faq__contact-mail:hover {
  color: var(--faq-panel);
  border-bottom-style: solid;
}

.page-faq__contact-note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(245, 241, 232, 0.72);
}

/* ---- 右侧答案区 ---- */
.page-faq__section {
  scroll-margin-top: calc(var(--header-h) + 24px);
  margin-bottom: 52px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(209, 213, 219, 0.18);
}

.page-faq__section:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.page-faq__section-title {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 23px;
  line-height: 1.35;
  font-weight: 800;
  color: var(--faq-panel);
  margin: 0 0 24px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--faq-accent);
  transition: color var(--tr), padding-left var(--tr);
}

.page-faq__section:target .page-faq__section-title {
  color: var(--faq-accent);
  padding-left: 12px;
}

/* ---- 手风琴 item ---- */
.page-faq__item {
  background: var(--faq-panel);
  color: var(--faq-ink);
  border: 2px solid var(--faq-ink);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.35);
  margin-bottom: 18px;
  transition: box-shadow var(--tr), transform var(--tr);
}

.page-faq__item:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.35);
}

.page-faq__item[open] {
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.35);
  transform: translate(0, 0);
}

.page-faq__item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 20px 18px 54px;
  position: relative;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.5;
  user-select: none;
  transition: background-color var(--tr);
}

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

.page-faq__item summary:hover {
  background: rgba(59, 130, 246, 0.08);
}

.page-faq__item summary::before {
  content: "+";
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  color: var(--faq-link);
  transition: color var(--tr), transform var(--tr);
}

.page-faq__item[open] summary::before {
  content: "–";
  color: var(--faq-accent);
}

.page-faq__answer {
  padding: 2px 24px 22px;
  border-top: 1px dashed var(--faq-mist);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq__answer p {
  margin: 14px 0 0;
}

.page-faq__answer p:first-child {
  margin-top: 12px;
}

/* ---- 三步排查 ---- */
.page-faq__steps {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-faq__steps li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px dotted var(--faq-mist);
}

.page-faq__steps li:last-child {
  border-bottom: none;
}

.page-faq__step-num {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 2px solid var(--faq-ink);
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 14px;
  color: var(--faq-ink);
  background: rgba(0, 255, 163, 0.12);
  box-shadow: 3px 3px 0 rgba(17, 24, 39, 0.22);
}

.page-faq__steps strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  margin-bottom: 4px;
}

.page-faq__steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
}

/* ---- 键盘按键 ---- */
.page-faq kbd {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  padding: 2px 8px;
  border: 1px solid var(--faq-graphite);
  border-bottom-width: 3px;
  border-radius: 4px;
  background: #f9fafb;
  color: var(--faq-ink);
  line-height: 1.5;
  white-space: nowrap;
}

/* ---- 图片与浏览器窗口 ---- */
.page-faq__figure {
  margin: 0 0 22px;
  border: 2px solid var(--faq-ink);
  background: var(--faq-panel);
  box-shadow: var(--shadow-card);
}

.page-faq__figure--records {
  margin-top: 26px;
}

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

.page-faq__figure figcaption {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--faq-ink);
  padding: 10px 14px;
  border-top: 2px solid var(--faq-ink);
  background: rgba(0, 255, 163, 0.16);
}

.page-faq__browser-window {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--faq-ink);
  border-bottom: 2px solid var(--faq-ink);
}

.page-faq__browser-dot {
  flex: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.page-faq__browser-dot--red {
  background: var(--faq-red);
}

.page-faq__browser-dot--yellow {
  background: #ffb020;
}

.page-faq__browser-dot--green {
  background: var(--faq-accent);
}

.page-faq__browser-bar {
  flex: 1;
  min-width: 0;
  margin-left: 8px;
  padding: 4px 12px;
  border-radius: 4px;
  background: rgba(245, 241, 232, 0.12);
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(245, 241, 232, 0.82);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---- 内联链接 ---- */
.page-faq__inline-link {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--faq-link);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color var(--tr), background-color var(--tr);
}

.page-faq__inline-link:hover {
  color: var(--faq-ink);
  background: rgba(0, 255, 163, 0.45);
  text-decoration: none;
}

/* ---- 信任声明 ---- */
.page-faq__trust {
  position: relative;
  margin-top: 64px;
  padding: 32px 28px 28px;
  background: var(--faq-panel);
  border: 3px solid var(--faq-ink);
  box-shadow: var(--shadow-panel);
  color: var(--faq-ink);
}

.page-faq__trust::before {
  content: "TRUST";
  position: absolute;
  top: -15px;
  left: 24px;
  background: var(--faq-accent);
  color: var(--faq-ink);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  padding: 4px 10px;
  border: 2px solid var(--faq-ink);
}

.page-faq__trust-title {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 800;
  margin: 0 0 12px;
  color: var(--faq-ink);
}

.page-faq__trust p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-graphite);
}

/* ---- 桌面端布局 ---- */
@media (min-width: 960px) {
  .page-faq__shell {
    padding: 44px 32px 100px;
  }

  .page-faq__head {
    padding: 36px 0 44px;
  }

  .page-faq__stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin: 36px 0 60px;
  }

  .page-faq__stat {
    padding: 24px;
  }

  .page-faq__layout {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq__index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq__section-title {
    font-size: 27px;
    margin-bottom: 28px;
  }

  .page-faq__item summary {
    padding-right: 28px;
    font-size: 15px;
  }

  .page-faq__figure {
    margin-bottom: 26px;
  }

  .page-faq__figure--records {
    max-width: 420px;
    margin-left: 24px;
  }
}