/* =========================================================
   看台指南（/tutorial/）页面专属样式
   作用域：.page-faq
   ========================================================= */

.page-faq {
  --faq-index: 236px;
  --faq-line: rgba(244, 241, 232, 0.8);
  --faq-line-dim: rgba(244, 241, 232, 0.68);
  --faq-panel: rgba(20, 48, 42, 0.52);
  --faq-panel-deep: rgba(11, 14, 13, 0.62);

  color: var(--paper);
  background: var(--ink);
}

.page-faq .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------------------------------------------------------
   首屏：框景头条
   --------------------------------------------------------- */

.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(26px, 5vw, 58px)) var(--gutter) clamp(40px, 6vw, 78px);
  background:
    radial-gradient(128% 100% at 86% -18%, rgba(198, 255, 61, 0.15), transparent 62%),
    radial-gradient(78% 62% at 3% 118%, rgba(255, 77, 46, 0.09), transparent 66%),
    linear-gradient(180deg, var(--ink) 0%, #081915 100%);
  border-bottom: 1px solid var(--fence);
  overflow: hidden;
}

.page-faq .hero-inner {
  max-width: var(--maxw);
  margin-inline: auto;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero-frame {
  position: relative;
  padding: clamp(22px, 3.6vw, 48px);
  border: 1px solid var(--fence);
  background: linear-gradient(152deg, rgba(20, 48, 42, 0.72), rgba(7, 19, 15, 0.4));
}

.page-faq .faq-hero-frame::before,
.page-faq .faq-hero-frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 2px solid var(--lime);
  pointer-events: none;
}

.page-faq .faq-hero-frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero-frame::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  max-width: 900px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 6.2vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.005em;
  text-transform: uppercase;
  color: var(--white);
}

.page-faq .faq-hero .lede {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.85;
  color: var(--faq-line);
}

/* 首屏三条路径卡 */

.page-faq .hero-routes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(26px, 4vw, 44px);
}

.page-faq .route-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num label"
    "num note";
  column-gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--fence);
  background: var(--faq-panel-deep);
  color: inherit;
  text-decoration: none;
  transition:
    border-color var(--dur) var(--ease),
    background var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.page-faq .route-num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--lime);
  padding-top: 4px;
}

.page-faq .route-label {
  grid-area: label;
  font-family: var(--font-head);
  font-size: 1.0625rem;
  line-height: 1.4;
  color: var(--white);
}

.page-faq .route-note {
  grid-area: note;
  margin-top: 6px;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--steel);
}

.page-faq .route-card:hover,
.page-faq .route-card:focus-visible {
  border-color: var(--lime);
  background: rgba(20, 48, 42, 0.78);
  transform: translateY(-3px);
}

/* ---------------------------------------------------------
   主体：左栏索引 + 右栏问答
   --------------------------------------------------------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 80px) var(--gutter) var(--rhythm);
}

.page-faq .faq-index {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.page-faq .index-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index-list > li {
  flex: 0 0 auto;
}

.page-faq .chapter-link {
  display: block;
  padding: 9px 14px;
  border: 1px solid var(--fence);
  font-size: 0.875rem;
  line-height: 1.4;
  color: var(--faq-line-dim);
  text-decoration: none;
  white-space: nowrap;
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .chapter-link:hover,
.page-faq .chapter-link:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
}

.page-faq .chapter-link[data-active] {
  color: var(--lime);
  border-color: var(--lime);
  background: rgba(198, 255, 61, 0.09);
}

.page-faq .index-foot {
  display: none;
  padding-top: 16px;
  border-top: 1px solid var(--fence);
}

.page-faq .index-foot p {
  margin: 0 0 10px;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--steel);
}

.page-faq .faq-content {
  min-width: 0;
}

/* 章节 */

.page-faq .faq-chapter {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-chapter + .faq-chapter {
  margin-top: clamp(52px, 8vw, 96px);
  padding-top: clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--fence);
}

.page-faq .faq-chapter .section-head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-chapter .section-title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(1.375rem, 3.4vw, 2.1rem);
  font-weight: 600;
  line-height: 1.28;
  color: var(--white);
}

.page-faq .chapter-lede {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--faq-line-dim);
}

/* 配图 */

.page-faq .chapter-figure {
  margin: clamp(20px, 3vw, 30px) 0;
}

.page-faq .chapter-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--fence);
  background: var(--turf);
}

.page-faq .chapter-figure-square img {
  max-width: 520px;
}

.page-faq .chapter-figure .media-caption {
  margin: 10px 0 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--steel);
}

/* 折叠问答 */

.page-faq .qa {
  border-top: 1px solid var(--fence);
  background: linear-gradient(180deg, rgba(20, 48, 42, 0.34), rgba(11, 14, 13, 0.16));
}

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--fence);
}

.page-faq .qa > summary {
  position: relative;
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 18px 52px 18px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  line-height: 1.55;
  color: var(--white);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

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

.page-faq .qa > summary::marker {
  content: "";
}

.page-faq .qa > summary:hover {
  color: var(--lime);
  background: rgba(198, 255, 61, 0.05);
}

.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-faq .qa > summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 18px;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 1.375rem;
  line-height: 1;
  color: var(--lime);
}

.page-faq .qa[open] > summary {
  background: rgba(198, 255, 61, 0.07);
}

.page-faq .qa[open] > summary::after {
  content: "\2013";
}

.page-faq .qa-num {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--lime);
}

.page-faq .qa-q {
  min-width: 0;
}

.page-faq .qa-body {
  margin-left: 16px;
  padding: 2px 22px 22px 14px;
  border-left: 2px solid var(--fence);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--faq-line);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .qa[open] .qa-body {
  border-left-color: var(--lime);
}

.page-faq .qa-body p {
  margin: 0 0 12px;
}

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

/* 窄条办理提示 */

.page-faq .hint {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 14px 18px 14px 20px;
  border-left: 3px solid var(--lime);
  background: linear-gradient(90deg, rgba(198, 255, 61, 0.1), rgba(198, 255, 61, 0) 72%);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--faq-line);
}

.page-faq .hint strong {
  color: var(--lime);
  font-weight: 600;
}

/* ---------------------------------------------------------
   路径示意图
   --------------------------------------------------------- */

.page-faq .path-map {
  margin: clamp(18px, 3vw, 28px) 0;
  padding: 12px;
  border: 1px solid var(--fence);
  background: linear-gradient(160deg, rgba(20, 48, 42, 0.5), rgba(11, 14, 13, 0.35));
  overflow-x: auto;
}

.page-faq .path-map svg {
  display: block;
  width: 100%;
  min-width: 420px;
  height: auto;
}

/* ---------------------------------------------------------
   表格
   --------------------------------------------------------- */

.page-faq .scroll-hint {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: clamp(18px, 3vw, 26px) 0 10px;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--steel);
}

.page-faq .table-wrap {
  overflow-x: auto;
  border: 1px solid var(--fence);
  background: var(--faq-panel-deep);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .table-wrap .data-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-faq .data-table th,
.page-faq .data-table td {
  padding: 13px 16px;
  text-align: left;
  border-bottom: 1px solid var(--fence);
  vertical-align: top;
}

.page-faq .data-table thead th {
  background: var(--turf);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lime);
  white-space: nowrap;
}

.page-faq .data-table tbody th {
  font-weight: 600;
  color: var(--white);
  white-space: nowrap;
}

.page-faq .data-table tbody td {
  color: var(--faq-line-dim);
}

.page-faq .data-table tbody tr:last-child th,
.page-faq .data-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .data-table thead th:first-child,
.page-faq .data-table tbody th:first-child {
  position: sticky;
  left: 0;
  z-index: 2;
  background: var(--turf);
}

.page-faq .data-table thead th:first-child {
  z-index: 3;
}

/* ---------------------------------------------------------
   来函格式模板
   --------------------------------------------------------- */

.page-faq .copy-board {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border: 1px solid var(--fence);
  background: var(--faq-panel-deep);
}

.page-faq .copy-board-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--fence);
  background: rgba(20, 48, 42, 0.6);
}

.page-faq .copy-board-title {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .copy-board-body {
  margin: 0;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.95;
  color: var(--faq-line-dim);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

/* ---------------------------------------------------------
   联络信息板
   --------------------------------------------------------- */

.page-faq .contact-board {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border: 1px solid var(--fence);
  background: linear-gradient(170deg, rgba(20, 48, 42, 0.6), rgba(11, 14, 13, 0.45));
}

.page-faq .contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--fence);
}

.page-faq .contact-row:last-child {
  border-bottom: 0;
}

.page-faq .contact-row .contact-label {
  flex: 0 0 88px;
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  color: var(--steel);
}

.page-faq .contact-row .contact-value {
  flex: 1 1 220px;
  min-width: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--white);
  word-break: break-word;
}

.page-faq .contact-row-plain {
  background: rgba(7, 19, 15, 0.4);
}

/* ---------------------------------------------------------
   收尾
   --------------------------------------------------------- */

.page-faq .faq-outro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(52px, 8vw, 96px);
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--fence);
  background:
    radial-gradient(120% 140% at 92% 0%, rgba(198, 255, 61, 0.13), transparent 58%),
    linear-gradient(150deg, rgba(20, 48, 42, 0.85), rgba(7, 19, 15, 0.6));
}

.page-faq .faq-outro .section-title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(1.375rem, 3.2vw, 2rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--white);
}

.page-faq .faq-outro p {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--faq-line-dim);
}

.page-faq .outro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: flex-start;
}

/* ---------------------------------------------------------
   响应式
   --------------------------------------------------------- */

@media (min-width: 640px) {
  .page-faq .hero-routes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-outro {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
  }
}

@media (min-width: 900px) {
  .page-faq .hero-routes .route-card:nth-child(2) {
    transform: translateY(-16px);
  }

  .page-faq .hero-routes .route-card:nth-child(2):hover,
  .page-faq .hero-routes .route-card:nth-child(2):focus-visible {
    transform: translateY(-19px);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-index) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index-list > li {
    flex: 0 0 auto;
  }

  .page-faq .chapter-link {
    padding: 10px 12px;
    border: 0;
    border-left: 2px solid var(--fence);
    white-space: normal;
  }

  .page-faq .chapter-link:hover,
  .page-faq .chapter-link:focus-visible {
    border-color: var(--lime);
    background: rgba(198, 255, 61, 0.06);
  }

  .page-faq .chapter-link[data-active] {
    border-left-color: var(--lime);
    background: linear-gradient(90deg, rgba(198, 255, 61, 0.14), rgba(198, 255, 61, 0));
  }

  .page-faq .index-foot {
    display: block;
  }
}

@media (min-width: 1280px) {
  .page-faq .qa > summary {
    padding-left: 20px;
  }

  .page-faq .qa-body {
    margin-left: 20px;
    padding-right: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .route-card,
  .page-faq .chapter-link,
  .page-faq .qa > summary,
  .page-faq .qa-body {
    transition: none;
  }

  .page-faq .route-card:hover,
  .page-faq .route-card:focus-visible,
  .page-faq .hero-routes .route-card:nth-child(2),
  .page-faq .hero-routes .route-card:nth-child(2):hover,
  .page-faq .hero-routes .route-card:nth-child(2):focus-visible {
    transform: none;
  }
}