/* ========== FAQ 页面专属样式 ========== */
.page-faq {
  background: var(--color-paper);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-breadcrumb {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 22px 20px 0;
}

.page-faq .faq-breadcrumb .breadcrumb {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--color-muted);
}

.page-faq .faq-breadcrumb .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-border);
}

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

.page-faq .faq-breadcrumb .breadcrumb a:hover {
  color: var(--color-cyan-text);
}

/* ---------- 顶部框景窗口 ---------- */
.page-faq .faq-hero {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 18px 20px 8px;
}

.page-faq .faq-hero__frame {
  background: var(--color-frame);
  border-color: var(--color-frame);
  color: #E8EEF1;
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 48px rgba(23, 42, 58, 0.16);
}

.page-faq .faq-hero__accent-line {
  height: 3px;
  background: linear-gradient(90deg, var(--color-amber), var(--color-purple), var(--color-cyan));
}

.page-faq .faq-hero__status-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 18px 22px 0;
}

.page-faq .faq-status-orb {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(46, 204, 113, 0.18);
}

.page-faq .faq-status-orb__core {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
}

.page-faq .faq-hero__status-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #D8E1E7;
}

.page-faq .faq-hero__version {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-neon);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.25);
  padding: 3px 10px;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.4vw, 3.3rem);
  font-weight: 300;
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin: 20px 22px 14px;
  max-width: 18em;
  color: #F7F4EE;
}

.page-faq .faq-hero__title-accent {
  color: var(--color-neon);
  font-weight: 400;
}

.page-faq .faq-hero__lead {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(230, 237, 240, 0.84);
  margin: 0 22px 22px;
  max-width: 58em;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 0 22px 24px;
}

.page-faq .faq-hero__stat {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.09);
  padding: 12px 14px;
  border-radius: var(--radius);
}

.page-faq .faq-hero__stat dt {
  font-size: 12px;
  color: rgba(230, 237, 240, 0.55);
}

.page-faq .faq-hero__stat dd {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--color-neon);
  margin: 3px 0 0;
}

.page-faq .faq-hero__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  margin: 0;
  border-top: 1px solid rgba(230, 237, 240, 0.18);
  object-fit: cover;
}

/* ---------- 主区域布局 ---------- */
.page-faq .faq-layout {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 26px 20px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* ---------- 左栏：问题总目 ---------- */
.page-faq .faq-index {
  flex: 0 0 auto;
}

.page-faq .faq-index__card {
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 0 var(--color-paper-layered), 0 14px 30px rgba(23, 42, 58, 0.08);
  padding: 22px 20px;
  position: relative;
}

.page-faq .faq-index__card::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 22px;
  height: 22px;
  background: linear-gradient(135deg, transparent 50%, var(--color-cyan) 50%);
  opacity: 0.55;
}

.page-faq .faq-index__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-muted);
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__item {
  margin-bottom: 14px;
}

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

.page-faq .faq-index__group {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--color-ink);
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  line-height: 1.5;
  padding: 2px 0;
  transition: color var(--transition);
}

.page-faq .faq-index__group:hover {
  color: var(--color-cyan-text);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--color-purple);
  min-width: 2em;
  transition: color var(--transition);
}

.page-faq .faq-index__group:hover .faq-index__num {
  color: var(--color-cyan);
}

.page-faq .faq-index__group[data-active="true"] .faq-index__num {
  color: var(--color-cyan);
}

.page-faq .faq-index__sublist {
  list-style: none;
  margin: 6px 0 0 20px;
  padding: 0 0 0 12px;
  border-left: 1px solid var(--color-border);
}

.page-faq .faq-index__sublist li {
  margin: 4px 0;
}

.page-faq .faq-index__sublist a {
  font-size: 12px;
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.page-faq .faq-index__sublist a:hover {
  color: var(--color-cyan-text);
}

.page-faq .faq-index__sublist a[data-active="true"] {
  color: var(--color-cyan-text);
  font-weight: 700;
}

/* ---------- 左栏状态卡 ---------- */
.page-faq .faq-status-card {
  margin-top: 14px;
  background: var(--color-frame);
  color: #E4EAEE;
  padding: 16px 18px;
  position: relative;
}

.page-faq .faq-status-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--color-success);
}

.page-faq .faq-status-card__title {
  font-size: 14px;
  font-weight: 700;
  margin: 0 0 4px;
  color: #F5F2EA;
}

.page-faq .faq-status-card__dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-success);
  margin-right: 6px;
  vertical-align: 1px;
}

.page-faq .faq-status-card__meta {
  font-size: 12px;
  color: rgba(228, 234, 238, 0.6);
  margin: 0;
}

/* ---------- 右栏答案区 ---------- */
.page-faq .faq-answers {
  flex: 1 1 auto;
  min-width: 0;
  counter-reset: faq-counter;
}

.page-faq .faq-group {
  margin-bottom: 40px;
  scroll-margin-top: 138px;
}

.page-faq .faq-group__header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-bottom: 2px solid var(--color-frame);
  padding-bottom: 8px;
  margin-bottom: 18px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-purple);
  letter-spacing: 0.02em;
}

.page-faq .faq-group__header h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-ink);
  margin: 0;
  letter-spacing: -0.01em;
}

/* ---------- 问题卡（details） ---------- */
.page-faq .faq-item {
  margin-bottom: 12px;
  border: 1px solid var(--color-border);
  background: #FFFFFF;
  box-shadow: var(--shadow-card);
  scroll-margin-top: 138px;
  position: relative;
  transition: border-color var(--transition);
}

.page-faq .faq-item[data-active="true"] {
  border-left: 3px solid var(--color-cyan);
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  padding: 16px 52px 16px 54px;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-ink);
}

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

.page-faq .faq-item summary::before {
  content: counter(faq-counter, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--color-muted);
  transition: color var(--transition);
  counter-increment: faq-counter;
}

.page-faq .faq-item summary:hover::before {
  color: var(--color-cyan);
}

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 300;
  color: var(--color-muted);
  transition: color var(--transition);
}

.page-faq .faq-item[open] summary::after {
  content: "–";
  color: var(--color-cyan);
}

.page-faq .faq-item__body {
  padding: 0 22px 18px 54px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-ink);
}

.page-faq .faq-item__body p {
  margin: 0 0 10px;
}

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

.page-faq .faq-item__body img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  margin: 16px 0 4px;
  border: 1px solid var(--color-border);
  background: var(--color-paper-layered);
  border-radius: var(--radius);
}

/* ---------- 帮助 CTA ---------- */
.page-faq .faq-help-cta {
  margin-top: 20px;
  padding: 20px;
  background: var(--color-paper-layered);
  border: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.page-faq .faq-help-cta__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 4px;
}

.page-faq .faq-help-cta p {
  margin: 0;
  font-size: 14px;
  color: var(--color-ink);
}

/* ---------- 信任信息 ---------- */
.page-faq .faq-trust {
  margin-top: 8px;
  padding: 18px 0 4px;
}

.page-faq .faq-trust .ruler {
  margin-bottom: 14px;
}

.page-faq .faq-trust p {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.7;
  margin: 0;
}

/* ========== 桌面端 ========== */
@media (min-width: 1024px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-faq .faq-index {
    width: 280px;
    position: sticky;
    top: 138px;
    max-height: calc(100vh - 170px);
    overflow-y: auto;
  }

  .page-faq .faq-answers {
    max-width: calc(100% - 320px);
  }

  .page-faq .faq-item summary {
    font-size: 16px;
  }
}