/* ===== 使用教程页 · 页面专属样式 ===== */
.page-faq {
  --faq-rail-w: 150px;
  --faq-side-w: 268px;
  padding-bottom: 20px;
}

/* —— 首屏 —— */
.page-faq .faq-hero {
  padding: 34px 0 10px;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 22px;
}

.page-faq .faq-hero__lead .h1 {
  margin: 10px 0 16px;
}

.page-faq .faq-hero__lead .lede {
  max-width: 64ch;
  margin: 0;
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}

.page-faq .fact {
  position: relative;
  overflow: hidden;
  padding: 14px 16px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(158deg, var(--navy-2), #16304e);
}

.page-faq .fact::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--orange), var(--cyan));
}

.page-faq .fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 19px;
  letter-spacing: .02em;
  line-height: 1.25;
  color: var(--cyan);
}

.page-faq .fact__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--warm);
}

/* —— 三步上手 —— */
.page-faq .faq-start {
  padding: 52px 0 14px;
}

.page-faq .faq-start__head {
  max-width: 68ch;
  margin-bottom: 26px;
}

.page-faq .faq-start__head .h2 {
  margin: 8px 0 12px;
}

.page-faq .faq-figure {
  position: relative;
  margin: 0 0 30px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--teal);
}

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

.page-faq .faq-figure__cap {
  display: block;
  padding: 10px 18px 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--warm);
  border-top: 1px solid var(--line);
  background: rgba(11, 26, 46, .5);
}

.page-faq .faq-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-faq .faq-flow__node {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--navy-2);
  transition: border-color .22s ease;
}

.page-faq .faq-flow__node:hover {
  border-color: rgba(255, 106, 26, .55);
}

.page-faq .faq-flow__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-faq .faq-flow__title {
  margin: 10px 0 8px;
  font-size: 19px;
  line-height: 1.35;
}

.page-faq .faq-flow__title a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 2px solid rgba(56, 225, 208, .45);
}

.page-faq .faq-flow__title a:hover,
.page-faq .faq-flow__title a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-flow__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--warm);
}

.page-faq .faq-flow__text a {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

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

/* —— 问答区骨架 —— */
.page-faq .faq-guides {
  padding: 46px 0 16px;
}

.page-faq .faq-deck {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

/* 左侧分组索引 */
.page-faq .faq-rail__cap {
  display: none;
}

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

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  font-size: 13.5px;
  white-space: nowrap;
  color: var(--silver);
  text-decoration: none;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  background: var(--teal);
  border-color: var(--cyan);
  color: var(--mist);
}

.page-faq .faq-rail__code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--orange);
}

/* —— 问题分组 —— */
.page-faq .faq-group {
  position: relative;
  margin-bottom: 48px;
  padding-top: 26px;
  scroll-margin-top: 120px;
}

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 56px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
}

.page-faq .faq-group::after {
  content: "";
  position: absolute;
  top: 1px;
  left: 56px;
  right: 0;
  height: 1px;
  background: var(--line);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: 22px;
  line-height: 1.35;
  color: var(--mist);
}

.page-faq .faq-group__note {
  max-width: 68ch;
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--warm);
}

/* —— 可展开问答 —— */
.page-faq .faq-item {
  margin-bottom: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--navy-2);
  transition: border-color .22s ease, background-color .22s ease;
}

.page-faq .faq-item[open] {
  border-color: rgba(56, 225, 208, .5);
  background: var(--teal);
}

.page-faq .faq-item__q {
  position: relative;
  display: block;
  padding: 16px 54px 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--mist);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 18px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--cyan);
}

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

.page-faq .faq-item[open] .faq-item__q::after {
  content: "−";
  color: var(--orange);
}

.page-faq .faq-item__a {
  padding: 14px 18px 18px;
  border-top: 1px dashed var(--line);
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

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

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 225, 208, .4);
}

.page-faq .faq-item__a .mono {
  color: var(--cyan);
  font-size: 14px;
}

/* —— 浅色反差分组 —— */
.page-faq .faq-group--paper {
  padding: 30px 22px 32px;
  border-radius: var(--r-lg);
  background: var(--cream);
}

.page-faq .faq-group--paper::before,
.page-faq .faq-group--paper::after {
  display: none;
}

.page-faq .faq-group--paper .faq-group__num {
  color: var(--brick);
}

.page-faq .faq-group--paper .faq-group__title {
  color: #0B1A2E;
}

.page-faq .faq-group--paper .faq-group__note {
  color: #4E5A68;
}

.page-faq .faq-group--paper .faq-item {
  background: #FBF9F4;
  border-color: rgba(11, 26, 46, .14);
}

.page-faq .faq-group--paper .faq-item[open] {
  background: #F2EDE1;
  border-color: rgba(198, 69, 27, .4);
}

.page-faq .faq-group--paper .faq-item__q {
  color: #10233A;
}

.page-faq .faq-group--paper .faq-item__q:hover {
  color: var(--brick);
}

.page-faq .faq-group--paper .faq-item__q::after {
  color: var(--brick);
}

.page-faq .faq-group--paper .faq-item[open] .faq-item__q::after {
  color: #0E3B45;
}

.page-faq .faq-group--paper .faq-item__a {
  border-top-color: rgba(11, 26, 46, .16);
  color: #35424F;
}

.page-faq .faq-group--paper .faq-item__a a {
  color: #0E6E7C;
  border-bottom-color: rgba(14, 110, 124, .35);
}

.page-faq .faq-group--paper .faq-item__a .mono {
  color: #0E6E7C;
}

/* —— 字段表与配图 —— */
.page-faq .faq-fieldgrid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin: 18px 0 24px;
}

.page-faq .faq-tablewrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--navy-2);
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-table {
  width: 100%;
  min-width: 430px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .faq-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--warm);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-table td {
  padding: 13px 16px;
  vertical-align: top;
  line-height: 1.6;
  color: var(--silver);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-table tbody tr:nth-child(even) {
  background: rgba(14, 59, 69, .34);
}

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

.page-faq .faq-table__key {
  font-family: var(--font-mono);
  font-size: 13px;
  white-space: nowrap;
  color: var(--orange);
}

.page-faq .faq-side-figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--teal);
}

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

/* —— 右侧术语速查 —— */
.page-faq .faq-terms {
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, var(--navy-2), rgba(18, 38, 63, .55));
}

.page-faq .faq-terms__cap {
  margin: 0 0 12px;
  padding-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--orange);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-terms__list {
  margin: 0;
  padding: 0;
}

.page-faq .faq-terms__row {
  padding: 11px 0;
  border-bottom: 1px dashed var(--line);
}

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

.page-faq .faq-terms__key {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-terms__val {
  margin: 5px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--warm);
}

.page-faq .faq-terms__acts {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.page-faq .faq-terms__acts .btn {
  padding: 10px 12px;
  text-align: center;
  font-size: 13.5px;
}

/* —— 底部求助条 —— */
.page-faq .faq-help {
  padding: 24px 0 56px;
}

.page-faq .faq-help__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 30px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(255, 106, 26, .16), transparent 55%),
    linear-gradient(180deg, var(--navy-2), var(--navy));
}

.page-faq .faq-help__panel .h3 {
  margin: 8px 0 10px;
  color: var(--mist);
}

.page-faq .faq-help__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-help__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 40px;
  margin: 0;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-help__meta > div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .faq-help__meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--warm);
}

.page-faq .faq-help__meta dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14.5px;
  color: var(--cyan);
}

/* —— 平板与桌面 —— */
@media (min-width: 780px) {
  .page-faq .faq-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-faq .faq-flow__node:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -16px;
    width: 8px;
    height: 8px;
    border-top: 2px solid var(--orange);
    border-right: 2px solid var(--orange);
    transform: translateY(-50%) rotate(45deg);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: 44px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
    gap: 40px;
  }

  .page-faq .faq-fieldgrid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
    gap: 28px;
  }

  .page-faq .faq-group--paper {
    padding: 34px 30px 36px;
  }

  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: center;
    padding: 36px 32px;
  }

  .page-faq .faq-help__meta {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1025px) {
  .page-faq .faq-deck {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr) var(--faq-side-w);
    align-items: start;
    gap: 34px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 118px;
  }

  .page-faq .faq-rail__cap {
    display: block;
    margin: 0 0 12px;
    padding-bottom: 10px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .2em;
    color: var(--warm);
    border-bottom: 1px solid var(--line);
  }

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

  .page-faq .faq-rail__link {
    padding: 10px 8px 10px 12px;
    border: 0;
    border-left: 2px solid var(--line-strong);
    border-radius: 0;
    white-space: normal;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--orange);
  }

  .page-faq .faq-terms {
    position: sticky;
    top: 118px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-flow__node,
  .page-faq .faq-item,
  .page-faq .faq-rail__link {
    transition: none;
  }
}