.page-faq {
  font-family: var(--font-sans);
  color: var(--white);
}

/* ===== 面包屑 ===== */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-small);
  color: var(--slate);
  margin: var(--space-4) 0 0;
  padding: 0;
}
.page-faq .breadcrumb-link {
  color: var(--slate);
  text-decoration: none;
  transition: color var(--transition);
}
.page-faq .breadcrumb-link:hover {
  color: var(--cyan);
}
.page-faq .breadcrumb-current {
  color: var(--white);
  font-weight: 700;
}

/* ===== 首屏 Hero ===== */
.page-faq .faq-hero {
  display: grid;
  gap: var(--space-5);
  margin: var(--space-4) 0 var(--space-6);
  padding: var(--space-5);
  background: var(--bg-gradient);
  border: 1px solid var(--cyan-border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 92% 100%, 0 100%);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -40px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--cyan-glass), transparent 70%);
  pointer-events: none;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: 30px;
  bottom: 20px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.12), transparent 72%);
  pointer-events: none;
}
.page-faq .faq-hero-copy {
  position: relative;
  z-index: 1;
}
.page-faq .faq-kicker {
  font-size: var(--font-small);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: var(--space-2);
}
.page-faq .faq-hero h1 {
  font-size: var(--font-h1);
  font-weight: 900;
  margin: 0 0 var(--space-3);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.page-faq .faq-hero-lead {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--slate);
  max-width: 640px;
  margin: 0 0 var(--space-5);
}
.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.page-faq .faq-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  position: relative;
  z-index: 1;
  align-content: start;
}
.page-faq .faq-hero-stat {
  padding: var(--space-3);
  background: var(--cyan-glass);
  border: 1px solid var(--cyan-border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  transition: transform var(--transition), background var(--transition);
}
.page-faq .faq-hero-stat:hover {
  transform: translateY(-2px);
  background: rgba(0, 240, 255, 0.16);
}
.page-faq .faq-hero-stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.1;
}
.page-faq .faq-hero-stat-label {
  font-size: var(--font-small);
  color: var(--slate);
  line-height: 1.4;
}

/* ===== 章节通用 ===== */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  padding-bottom: var(--space-7);
}
.page-faq .faq-toc {
  display: none;
}
.page-faq .faq-main {
  min-width: 0;
}
.page-faq .faq-section {
  margin-bottom: var(--space-7);
  position: relative;
}
.page-faq .faq-section-head {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--cyan-border);
}
.page-faq .faq-section-index {
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 900;
  line-height: 0.9;
  color: var(--orange);
  flex-shrink: 0;
  transform: translateY(0.1em);
}
.page-faq .faq-section-title h2 {
  font-size: var(--font-h2);
  font-weight: 900;
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

/* ===== 01 数据更新间隔 ===== */
.page-faq .faq-interval-grid {
  display: grid;
  gap: var(--space-5);
}
.page-faq .faq-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-faq .faq-interval-table {
  width: 100%;
  min-width: 480px;
  border-collapse: separate;
  border-spacing: 0;
  font-family: var(--font-mono);
  font-size: var(--font-small);
  border: 1px solid var(--cyan-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-faq .faq-interval-table th {
  background: var(--bg-panel);
  color: var(--cyan);
  font-weight: 700;
  text-align: left;
  padding: var(--space-3);
  border-bottom: 1px solid var(--cyan-border);
  white-space: nowrap;
}
.page-faq .faq-interval-table td {
  padding: var(--space-3);
  border-bottom: 1px solid rgba(0, 240, 255, 0.12);
  color: var(--white);
  vertical-align: top;
}
.page-faq .faq-interval-table tbody tr:nth-child(odd) {
  background: var(--cyan-glass);
}
.page-faq .faq-interval-table tbody tr:hover {
  background: rgba(0, 240, 255, 0.18);
}
.page-faq .faq-interval-table tbody tr:last-child td {
  border-bottom: none;
}
.page-faq .faq-interval-figure {
  margin: 0;
}
.page-faq .faq-interval-figure .img-frame,
.page-faq .faq-questions-figure .img-frame {
  display: block;
}
.page-faq .faq-interval-figure img,
.page-faq .faq-questions-figure img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--cyan-border);
}
.page-faq .faq-interval-figure figcaption {
  margin-top: var(--space-2);
  font-size: var(--font-small);
  color: var(--slate);
  line-height: 1.6;
}
.page-faq .faq-interval-note {
  margin: var(--space-4) 0 0;
  padding: var(--space-3);
  background: var(--cyan-glass);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--font-small);
  color: var(--slate);
  line-height: 1.7;
}

/* ===== 02 常见问题 ===== */
.page-faq .faq-questions-figure {
  margin: 0 0 var(--space-5);
}
.page-faq .faq-questions-figure .img-frame {
  clip-path: polygon(0 0, 100% 0, 100% 86%, 4% 100%);
}
.page-faq .faq-group {
  margin-bottom: var(--space-6);
}
.page-faq .faq-group-title {
  font-size: var(--font-h3);
  font-weight: 900;
  margin: 0 0 var(--space-3);
  color: var(--white);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.page-faq .faq-group-title span {
  color: var(--orange);
  font-family: var(--font-mono);
  font-weight: 700;
}
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.page-faq .faq-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(0, 240, 255, 0.14);
  border-left: 4px solid transparent;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  position: relative;
  transition: background var(--transition), border-color var(--transition);
}
.page-faq .faq-item:hover {
  background: rgba(0, 240, 255, 0.06);
}
.page-faq .faq-item[open] {
  background: var(--cyan-glass);
  border-left-color: var(--cyan);
}
.page-faq .faq-item-summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  cursor: pointer;
  position: relative;
  font-weight: 700;
  line-height: 1.5;
}
.page-faq .faq-item-summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item-summary::before {
  content: "";
  flex-shrink: 0;
  width: 18px;
  height: 100%;
  min-height: 34px;
  align-self: stretch;
  background: repeating-linear-gradient(
    90deg,
    var(--cyan) 0 2px,
    transparent 2px 4px,
    var(--orange) 4px 5px,
    transparent 5px 7px,
    var(--cyan) 7px 9px,
    transparent 9px 12px,
    var(--orange) 12px 13px,
    transparent 13px 16px
  );
  opacity: 0.65;
  border-radius: 2px;
}
.page-faq .faq-item-num {
  font-family: var(--font-mono);
  font-size: var(--font-small);
  font-weight: 700;
  color: var(--orange);
  flex-shrink: 0;
}
.page-faq .faq-item-label {
  flex: 1;
  min-width: 0;
}
.page-faq .faq-item-mark {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.page-faq .faq-item-mark::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
  transition: transform var(--transition);
}
.page-faq .faq-item[open] .faq-item-mark::after {
  content: "−";
  transform: rotate(180deg);
}
.page-faq .faq-item-body {
  padding: 0 var(--space-4) var(--space-3) calc(var(--space-3) + 18px + var(--space-3));
  color: var(--slate);
  font-size: var(--font-body);
  line-height: 1.7;
  border-top: 1px dashed rgba(0, 240, 255, 0.14);
  margin-top: 0;
}
.page-faq .faq-item-body p {
  margin: var(--space-2) 0 0;
}

/* ===== 03 使用教程 ===== */
.page-faq .faq-tutorial-grid {
  display: grid;
  gap: var(--space-4);
}
.page-faq .faq-tutorial-card {
  background: var(--bg-gradient);
  border: 1px solid var(--cyan-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 94%, 96% 100%, 0 100%);
}
.page-faq .faq-tutorial-card::after {
  content: "";
  position: absolute;
  right: -30px;
  top: -30px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--cyan-glass), transparent 70%);
  pointer-events: none;
}
.page-faq .faq-tutorial-card-head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}
.page-faq .faq-tutorial-tag {
  font-family: var(--font-mono);
  font-size: var(--font-small);
  font-weight: 700;
  color: var(--orange);
  background: rgba(255, 107, 53, 0.1);
  border: 1px solid rgba(255, 107, 53, 0.3);
  border-radius: var(--radius-pill);
  padding: 2px var(--space-2);
  flex-shrink: 0;
}
.page-faq .faq-tutorial-card h3 {
  font-size: var(--font-h3);
  font-weight: 900;
  margin: 0;
  line-height: 1.3;
}
.page-faq .faq-tutorial-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: tutorial-step;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.page-faq .faq-tutorial-steps li {
  counter-increment: tutorial-step;
  position: relative;
  padding-left: calc(var(--space-4) + var(--space-3));
  font-size: var(--font-small);
  color: var(--slate);
  line-height: 1.7;
}
.page-faq .faq-tutorial-steps li::before {
  content: counter(tutorial-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--cyan);
  background: var(--cyan-glass);
  border-radius: var(--radius-sm);
  width: 32px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  border: 1px solid var(--cyan-border);
}
.page-faq .faq-tutorial-note {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-panel);
  border-radius: var(--radius-md);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.page-faq .faq-tutorial-note p {
  margin: 0;
  font-size: var(--font-small);
  color: var(--slate);
  line-height: 1.6;
}

/* ===== 04 数据与隐私 ===== */
.page-faq .faq-privacy-grid {
  display: grid;
  gap: var(--space-4);
}
.page-faq .faq-privacy-panel {
  background: var(--bg-gradient);
  border: 1px solid var(--cyan-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.page-faq .faq-privacy-panel h3 {
  font-size: var(--font-h3);
  font-weight: 900;
  margin: 0 0 var(--space-3);
  color: var(--cyan);
}
.page-faq .faq-privacy-panel p {
  margin: 0 0 var(--space-3);
  font-size: var(--font-small);
  color: var(--slate);
  line-height: 1.7;
}
.page-faq .faq-privacy-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.page-faq .faq-privacy-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}
.page-faq .faq-privacy-facts li {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  font-size: var(--font-small);
  color: var(--slate);
  line-height: 1.6;
}
.page-faq .faq-privacy-facts strong {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--white);
  background: var(--cyan-glass);
  padding: 2px var(--space-2);
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

/* ===== 桌面端媒体查询 ===== */
@media (min-width: 768px) {
  .page-faq .faq-hero {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: stretch;
    padding: var(--space-6);
    margin-bottom: var(--space-7);
  }
  .page-faq .faq-hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-hero-lead {
    font-size: 1.0625rem;
  }
  .page-faq .faq-interval-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
  .page-faq .faq-interval-figure {
    margin-top: var(--space-1);
  }
  .page-faq .faq-questions-figure {
    margin: 0 0 var(--space-5) var: 0;
    margin-left: 0;
  }
  .page-faq .faq-group {
    margin-bottom: var(--space-7);
  }
  .page-faq .faq-tutorial-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-privacy-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: var(--space-6);
  }
  .page-faq .faq-main {
    grid-column: 1;
    grid-row: 1;
  }
  .page-faq .faq-toc {
    grid-column: 2;
    grid-row: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    position: sticky;
    top: var(--space-6);
    align-self: start;
    padding: var(--space-4);
    background: var(--bg-panel);
    border: 1px solid var(--cyan-border);
    border-radius: var(--radius-md);
  }
  .page-faq .faq-toc-head {
    font-size: var(--font-small);
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--cyan);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--cyan-border);
    margin-bottom: var(--space-1);
  }
  .page-faq .faq-toc-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--slate);
    font-size: var(--font-small);
    font-weight: 500;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
    border: 1px solid transparent;
  }
  .page-faq .faq-toc-link:hover {
    color: var(--white);
    background: rgba(0, 240, 255, 0.08);
    border-color: var(--cyan-border);
  }
  .page-faq .faq-toc-link.is-active {
    color: var(--cyan);
    background: var(--cyan-glass);
    border-color: var(--cyan-border);
    font-weight: 700;
  }
  .page-faq .faq-toc-num {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    color: var(--orange);
    flex-shrink: 0;
  }
  .page-faq .faq-toc-text {
    line-height: 1.3;
  }
  .page-faq .faq-toc-link.is-active .faq-toc-num {
    color: var(--cyan);
  }
}