/* ===== 问答中心 / page-faq ===== */

.page-faq {
  --faq-rail: 264px;
  display: block;
  color: var(--paper);
  background:
    radial-gradient(120% 55% at 88% -6%, rgba(35, 42, 102, 0.5), transparent 64%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink) 100%);
}

/* --- 首屏 --- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 40px) 0 clamp(26px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(140% 100% at 8% 0%, rgba(43, 232, 208, 0.14), transparent 58%),
    linear-gradient(180deg, var(--ink-2), var(--ink));
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, var(--hair) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, var(--hair) 0 1px, transparent 1px 72px);
  opacity: 0.5;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 78%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 78%);
}

.page-faq .faq-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero__lead h1 {
  margin: 10px 0 0;
  font-size: clamp(30px, 6.4vw, 50px);
  line-height: 1.14;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__text {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-faq .faq-facts {
  padding: 16px 18px 6px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 63, 55, 0.85), rgba(7, 30, 26, 0.92));
  box-shadow: inset 0 1px 0 rgba(140, 245, 230, 0.08);
}

.page-faq .faq-facts__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-facts__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 9px 0;
  border-top: 1px dashed var(--hair);
}

.page-faq .faq-facts__key {
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-facts__val {
  font-family: var(--mono);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--paper);
}

.page-faq .faq-facts__val .num {
  color: var(--cyan);
  font-weight: 700;
}

/* --- 正文骨架 --- */
.page-faq .faq-body {
  padding: clamp(26px, 4vw, 56px) 0 clamp(48px, 6vw, 84px);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

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

/* --- 索引 --- */
.page-faq .faq-index .toc__title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-faq .faq-index .toc__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 .toc__list li {
  flex: 0 0 auto;
  margin: 0;
}

.page-faq .faq-index .toc__link {
  display: inline-block;
  padding: 8px 12px;
  white-space: nowrap;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-index .toc__link:hover,
.page-faq .faq-index .toc__link:focus-visible {
  color: var(--cyan-soft);
  border-color: var(--line-strong);
}

.page-faq .faq-index .toc__link[aria-current="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* --- 章节 --- */
.page-faq .faq-sec {
  padding-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-sec + .faq-sec {
  margin-top: clamp(28px, 4vw, 52px);
}

.page-faq .faq-sec__title {
  margin: 8px 0 0;
  font-size: clamp(21px, 3.4vw, 28px);
  line-height: 1.32;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-sec__note {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-sec--band {
  margin-left: calc(-1 * clamp(0px, 1.6vw, 20px));
  margin-right: calc(-1 * clamp(0px, 1.6vw, 20px));
  padding: clamp(20px, 3vw, 32px) clamp(14px, 2.4vw, 26px) clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 80% at 100% 0%, rgba(43, 232, 208, 0.1), transparent 60%),
    linear-gradient(180deg, rgba(13, 46, 40, 0.72), rgba(7, 30, 26, 0.5));
}

.page-faq .faq-sec--panel {
  padding: clamp(20px, 3vw, 32px) clamp(14px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 63, 55, 0.62), rgba(7, 30, 26, 0.42));
}

.page-faq .faq-sec--service {
  padding-left: clamp(14px, 2.2vw, 24px);
  border-left: 3px solid var(--flame);
}

.page-faq .faq-sec--more {
  border-top-color: var(--line-strong);
}

/* --- 三条上手路径 --- */
.page-faq .faq-start {
  display: grid;
  gap: 20px;
  margin-top: 20px;
}

.page-faq .faq-start__paths {
  display: grid;
  gap: 12px;
}

.page-faq .faq-start__paths .plate__title {
  margin: 6px 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-start__paths .plate__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.68;
  color: var(--mist);
}

.page-faq .faq-start__paths .plate__no {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

/* --- 图 --- */
.page-faq .figure {
  margin: 0;
}

.page-faq .figure__frame {
  overflow: hidden;
}

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

.page-faq .faq-start__fig .figure__frame {
  aspect-ratio: 12 / 7;
}

.page-faq .faq-refresh__fig .figure__frame {
  aspect-ratio: 3 / 2;
}

.page-faq .faq-refresh__fig {
  margin-top: 20px;
}

.page-faq .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.66;
  color: var(--mist);
}

/* --- 问答条目 --- */
.page-faq .qa-list {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.page-faq .qa {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(13, 46, 40, 0.7), rgba(7, 30, 26, 0.55));
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-faq .qa:hover {
  border-color: var(--line-strong);
}

.page-faq .qa[open] {
  border-color: var(--line-strong);
  background: linear-gradient(180deg, rgba(18, 63, 55, 0.9), rgba(7, 30, 26, 0.7));
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  padding: 15px clamp(13px, 2vw, 20px);
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa__no {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

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

.page-faq .qa__mark {
  align-self: center;
  font-family: var(--mono);
  font-size: 17px;
  line-height: 1;
  color: var(--mist);
}

.page-faq .qa__mark::before {
  content: "+";
}

.page-faq .qa[open] .qa__mark::before {
  content: "–";
  color: var(--flame);
}

.page-faq .qa__a {
  padding: 0 clamp(13px, 2vw, 20px) 16px;
  border-top: 1px dashed var(--hair);
  padding-top: 12px;
  margin-left: clamp(13px, 2vw, 20px);
  margin-right: clamp(13px, 2vw, 20px);
  padding-left: 0;
  padding-right: 0;
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 74ch;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--mist);
}

.page-faq .qa[open] .qa__a {
  animation: faq-answer-in 0.28s ease both;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* --- 延伸入口 --- */
.page-faq .faq-sec--more .idxlist {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-sec--more .idxlist__item a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  padding: 14px clamp(13px, 2vw, 18px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  background: linear-gradient(180deg, rgba(13, 46, 40, 0.6), rgba(7, 30, 26, 0.45));
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-sec--more .idxlist__item a:hover,
.page-faq .faq-sec--more .idxlist__item a:focus-visible {
  border-color: var(--cyan);
  background: linear-gradient(180deg, rgba(18, 63, 55, 0.92), rgba(7, 30, 26, 0.6));
}

.page-faq .faq-sec--more .idxlist__no {
  grid-row: span 2;
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--flame);
}

.page-faq .faq-sec--more .idxlist__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--cyan-soft);
}

.page-faq .faq-sec--more .idxlist__meta {
  grid-column: 2;
  font-size: 13.5px;
  line-height: 1.66;
  color: var(--mist);
}

/* --- 中屏 --- */
@media (min-width: 640px) {
  .page-faq .faq-hero__text {
    font-size: 16px;
  }

  .page-faq .qa__q {
    font-size: 16.5px;
    padding: 17px clamp(16px, 2vw, 22px);
  }

  .page-faq .qa__a p {
    font-size: 15px;
  }
}

/* --- 上手路径双栏 --- */
@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.85fr);
    align-items: end;
  }

  .page-faq .faq-start {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: start;
    gap: 26px;
  }

  .page-faq .faq-sec--more .idxlist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* --- 桌面：左索引 + 右内容 --- */
@media (min-width: 1000px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    border-left: 1px solid var(--line);
    padding-left: 4px;
  }

  .page-faq .faq-index .toc__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index .toc__list li {
    display: block;
  }

  .page-faq .faq-index .toc__link {
    display: block;
    padding: 10px 12px;
    white-space: normal;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    line-height: 1.5;
  }

  .page-faq .faq-index .toc__link[aria-current="true"] {
    color: var(--paper);
    background: linear-gradient(90deg, rgba(43, 232, 208, 0.16), transparent);
    border-left-color: var(--cyan);
  }
}

/* --- 大屏 --- */
@media (min-width: 1200px) {
  .page-faq .faq-sec__title {
    font-size: 28px;
  }

  .page-faq .faq-facts {
    padding: 20px 22px 8px;
  }
}

/* --- 降级动效 --- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .qa,
  .page-faq .faq-index .toc__link,
  .page-faq .faq-sec--more .idxlist__item a {
    transition: none;
  }
}