/* ---------- page-faq 使用指引 ---------- */
.page-faq {
  --faq-bg: var(--cream);
  --faq-card-bg: var(--white);
  --faq-ink: var(--ink);
  --faq-teal: var(--teal);
  --faq-orange: var(--orange);
  --faq-yellow: var(--yellow);
  --faq-magenta: var(--magenta);
  --faq-blue: var(--blue);
  --faq-purple: var(--purple);
  --faq-green: var(--green);
  --faq-gray: var(--gray);
  --faq-monospace: var(--font-mono);
  background: var(--faq-bg);
  color: var(--faq-ink);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 面包屑 */
.page-faq .breadcrumb {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 1rem 1.5rem 0;
  font-size: 0.85rem;
}

.page-faq .breadcrumb a {
  color: var(--faq-teal);
  text-decoration: none;
  font-weight: 600;
}

.page-faq .breadcrumb a:hover {
  border-bottom: 2px solid var(--faq-orange);
}

.page-faq .breadcrumb-sep {
  margin: 0 0.5rem;
  color: var(--faq-gray);
}

.page-faq .breadcrumb-current {
  color: var(--faq-orange);
  font-weight: 600;
}

/* 页头 */
.page-faq .page-head {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 1.2rem 1.5rem 2.5rem;
}

.page-faq .page-kicker {
  font-family: var(--font-monospace);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--faq-teal);
  margin-bottom: 0.4rem;
}

.page-faq .page-title {
  margin: 0;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  line-height: 1.3;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.page-faq .page-lead {
  margin: 0.7rem 0 0;
  max-width: 60ch;
  color: #514f4a;
  font-size: 0.95rem;
}

/* 板块通用 */
.page-faq .section-block {
  padding: 2.5rem 0;
}

.page-faq .content-shell {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.page-faq .section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  border-bottom: 3px solid var(--faq-ink);
  padding-bottom: 0.5rem;
}

.page-faq .section-title {
  margin: 0;
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  font-weight: 900;
  line-height: 1.2;
  border-left: 5px solid var(--faq-orange);
  padding-left: 0.7rem;
}

.page-faq .section-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--faq-gray);
  white-space: nowrap;
}

/* 分栏容器 */
.page-faq .qa-split {
  background: var(--faq-bg);
  padding-bottom: 2rem;
}

.page-faq .split-inner {
  display: grid;
  gap: 2.2rem;
}

/* 快速上手列 */
.page-faq .quick-start-col .section-head {
  border-bottom-color: var(--faq-teal);
}

.page-faq .quick-img {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
  margin: 0 0 1rem auto;
  border: 2px solid var(--faq-ink);
  box-shadow: var(--shadow-hard);
  background: #f5ead3;
}

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

.page-faq .step-card {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  background: var(--faq-card-bg);
  border: 2px solid var(--faq-ink);
  border-radius: 0;
  box-shadow: 3px 3px 0 rgba(26, 26, 26, 0.18);
  padding: 0.95rem 1rem 0.85rem;
  margin-bottom: 0.8rem;
  transition: transform 0.18s var(--ease-out), box-shadow 0.18s var(--ease-out), background 0.18s;
}

.page-faq .step-card:hover {
  transform: translateY(-3px);
  box-shadow: 5px 5px 0 var(--faq-orange);
  background: #fff8ec;
}

.page-faq .step-num {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 800;
  color: var(--faq-orange);
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-faq .step-body {
  min-width: 0;
}

.page-faq .step-title {
  margin: 0 0 0.25rem;
  font-size: 0.98rem;
  font-weight: 800;
}

.page-faq .step-text {
  margin: 0;
  font-size: 0.86rem;
  color: #555;
}

/* 常见问题列 */
.page-faq .faq-col .section-head {
  border-bottom-color: var(--faq-magenta);
}

.page-faq .faq-list {
  display: grid;
  gap: 0.7rem;
}

.page-faq .faq-item {
  background: var(--faq-card-bg);
  border: 2px solid var(--faq-ink);
  box-shadow: 2px 2px 0 rgba(26, 26, 26, 0.14);
}

.page-faq .faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.9rem 1rem;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.93rem;
  transition: background 0.16s;
}

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

.page-faq .faq-item summary:hover {
  background: #fff4e3;
}

.page-faq .faq-icon {
  flex: 0 0 1.1rem;
  width: 1.1rem;
  height: 1.1rem;
  position: relative;
  transition: transform 0.18s var(--ease-out);
}

.page-faq .faq-icon::before,
.page-faq .faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 2px;
  background: var(--faq-magenta);
  transform: translate(-50%, -50%);
}

.page-faq .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform 0.18s var(--ease-out);
}

.page-faq .faq-item[open] .faq-icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .faq-a {
  margin: 0;
  padding: 0.4rem 1rem 1rem 1.9rem;
  font-size: 0.88rem;
  color: #4a4843;
  border-top: 1px dashed #c9c0ad;
}

/* 清晰度与字幕 */
.page-faq .quality-section {
  background: var(--faq-teal);
  color: var(--white);
}

.page-faq .quality-section .section-title {
  border-left-color: var(--faq-yellow);
  color: var(--white);
}

.page-faq .quality-section .section-tag {
  color: #a7dce4;
}

.page-faq .quality-intro {
  max-width: 70ch;
  margin: 0 0 1.2rem;
  color: #d8eff3;
  font-size: 0.9rem;
}

.page-faq .quality-img {
  display: block;
  max-width: 400px;
  width: 100%;
  height: auto;
  margin-bottom: 1.2rem;
  border: 2px solid var(--faq-ink);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.28);
  background: #1d6476;
}

.page-faq .data-table-wrap {
  overflow-x: auto;
  background: var(--faq-teal);
  border: 2px solid var(--faq-ink);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.24);
}

.page-faq .data-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.page-faq .data-table th {
  background: var(--faq-ink);
  color: var(--faq-yellow);
  text-align: left;
  padding: 0.75rem 0.9rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.page-faq .data-table td {
  padding: 0.75rem 0.9rem;
  border-top: 1px solid #2e758a;
  color: var(--white);
  background: rgba(255, 255, 255, 0.02);
}

.page-faq .data-table tbody tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.06);
}

.page-faq .data-table tbody tr:hover td {
  background: rgba(255, 255, 255, 0.12);
  transition: background 0.15s;
}

.page-faq .data-table td[data-label="清晰度档位"] {
  white-space: nowrap;
}

.page-faq .q-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--faq-ink);
}

.page-faq .q-smooth {
  background: var(--faq-gray);
  color: var(--white);
}

.page-faq .q-hd {
  background: var(--faq-yellow);
  color: var(--faq-ink);
}

.page-faq .q-uhd {
  background: var(--faq-blue);
  color: var(--faq-ink);
}

/* 反馈区 */
.page-faq .feedback-section {
  background: var(--faq-purple);
  color: var(--white);
}

.page-faq .feedback-section .section-title {
  border-left-color: var(--faq-blue);
}

.page-faq .feedback-section .section-tag {
  color: #b3a5d8;
}

.page-faq .feedback-grid {
  display: grid;
  gap: 1.2rem;
}

.page-faq .feedback-card {
  background: #49396e;
  border: 2px solid var(--faq-ink);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.3);
  padding: 1.5rem 1.4rem 1.4rem;
  transition: transform 0.18s var(--ease-out), box-shadow 0.18s var(--ease-out);
}

.page-faq .feedback-card:hover {
  transform: translateY(-3px);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.4);
}

.page-faq .feedback-icon {
  font-size: 1.4rem;
  line-height: 1;
  display: inline-block;
  background: var(--faq-yellow);
  color: var(--faq-ink);
  width: 2rem;
  text-align: center;
  padding: 0.2rem 0;
  margin-bottom: 0.8rem;
  border: 2px solid var(--faq-ink);
}

.page-faq .feedback-title {
  margin: 0 0 0.6rem;
  font-size: 1.1rem;
  font-weight: 900;
}

.page-faq .feedback-text {
  margin: 0 0 0.8rem;
  font-size: 0.88rem;
  color: #c9bde8;
}

.page-faq .feedback-email {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--faq-ink);
  color: var(--faq-yellow);
  display: inline-block;
  padding: 0.3rem 0.6rem;
  margin-bottom: 0.95rem;
}

.page-faq .feedback-note {
  margin: 0 0 0.9rem;
  font-size: 0.85rem;
  color: #c9bde8;
}

.page-faq .btn {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  border: 2px solid var(--faq-ink);
  font-weight: 800;
  font-size: 0.88rem;
  text-decoration: none;
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.24);
  transition: transform 0.15s, box-shadow 0.15s;
  cursor: pointer;
  color: var(--faq-ink);
}

.page-faq .btn[data-tone="yellow"] {
  background: var(--faq-yellow);
}

.page-faq .btn:hover {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 rgba(0, 0, 0, 0.24);
}

.page-faq .meter-row {
  margin-top: 1rem;
}

.page-faq .meter-label {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: #c9bde8;
  letter-spacing: 0.06em;
}

.page-faq .meter-bar {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid var(--faq-ink);
  height: 1.3rem;
  margin-top: 0.35rem;
  max-width: 26rem;
}

.page-faq .meter-fill {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  height: 100%;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding-right: 0.4rem;
  color: var(--faq-ink);
  font-weight: 700;
  background: var(--faq-green);
}

.page-faq .meter-fill[data-tone="green"] {
  background: var(--faq-green);
}

/* 滚动显现基础态 */
.page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}

.page-faq [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

.page-faq [data-reveal-delay="60"] { transition-delay: 0.06s; }
.page-faq [data-reveal-delay="80"] { transition-delay: 0.08s; }
.page-faq [data-reveal-delay="120"] { transition-delay: 0.12s; }
.page-faq [data-reveal-delay="160"] { transition-delay: 0.16s; }
.page-faq [data-reveal-delay="180"] { transition-delay: 0.18s; }
.page-faq [data-reveal-delay="240"] { transition-delay: 0.24s; }
.page-faq [data-reveal-delay="300"] { transition-delay: 0.3s; }
.page-faq [data-reveal-delay="360"] { transition-delay: 0.36s; }
.page-faq [data-reveal-delay="420"] { transition-delay: 0.42s; }

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-faq .step-card,
  .page-faq .feedback-card {
    transition: none;
  }
}

/* ========== 桌面媒体查询 ========== */
@media (min-width: 900px) {
  .page-faq .page-head {
    padding-top: 2rem;
    padding-bottom: 3.5rem;
  }

  .page-faq .section-block {
    padding: 3.5rem 0;
  }

  .page-faq .split-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 2.8rem;
    align-items: start;
  }

  .page-faq .quick-start-col .section-head {
    margin-bottom: 0.8rem;
  }

  .page-faq .quick-img {
    margin-left: 0;
    max-width: 240px;
  }

  .page-faq .step-card {
    padding: 1.1rem 1.2rem 1rem;
  }

  .page-faq .faq-item summary {
    padding: 1rem 1.2rem;
  }

  .page-faq .feedback-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .data-table th,
  .page-faq .data-table td {
    padding: 0.9rem 1.2rem;
  }
}

@media (max-width: 480px) {
  .page-faq .section-head {
    flex-wrap: wrap;
    align-items: center;
  }

  .page-faq .section-tag {
    font-size: 0.65rem;
  }

  .page-faq .step-card {
    box-shadow: 2px 2px 0 rgba(26, 26, 26, 0.15);
  }

  .page-faq .qa-split {
    padding-left: 0.5rem;
    padding-right: 0.5rem;
  }

  .page-faq .content-shell {
    padding-inline: 1rem;
  }

  .page-faq .feedback-grid {
    grid-template-columns: 1fr;
  }
}

/* 兼容所有图片 */
.page-faq img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq {
  --font-monospace: inherit;
}