/* ========== 常见问答 /faqs/ · page-faq ========== */
.page-faq {
  --faq-rail: 250px;
  --faq-tint: rgba(198, 255, 61, 0.07);
  --faq-tint-strong: rgba(198, 255, 61, 0.14);
  background: var(--ams-night);
  color: var(--ams-cream);
  padding-bottom: clamp(32px, 6vw, 72px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(20px, 4vw, 40px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -10% -20% auto -20%;
  height: 420px;
  background: radial-gradient(60% 100% at 20% 0%, rgba(255, 106, 43, 0.16), transparent 70%),
              radial-gradient(50% 100% at 85% 10%, rgba(198, 255, 61, 0.12), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-hero .ams-container {
  position: relative;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(20px, 3.4vw, 44px);
  margin-top: clamp(18px, 3vw, 30px);
  align-items: center;
}

.page-faq .faq-hero__text {
  display: grid;
  gap: 14px;
}

.page-faq .faq-hero .ams-h1 {
  font-family: var(--ams-font-display);
  font-size: clamp(30px, 6.2vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ams-cream);
}

.page-faq .faq-hero .ams-lede {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--ams-cream-82);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 3px solid var(--ams-line-dark);
  box-shadow: var(--ams-shadow-soft);
  background: var(--ams-turf);
}

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

.page-faq .faq-hero__media .ams-media__caption {
  display: block;
  padding: 10px 14px;
  font-family: var(--ams-font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ams-cream-70);
  border-top: 2px solid var(--ams-line-dark);
}

/* 关键节点带 */
.page-faq .faq-keynums {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ams-line-dark);
  border: 3px solid var(--ams-line-dark);
}

.page-faq .faq-keynums li {
  background: var(--ams-turf);
  padding: 16px 18px;
}

.page-faq .faq-keynums li:nth-child(1) {
  box-shadow: inset 4px 0 0 var(--ams-orange);
}

.page-faq .faq-keynums li:nth-child(2) {
  box-shadow: inset 4px 0 0 var(--ams-lime);
}

.page-faq .faq-keynums li:nth-child(3) {
  box-shadow: inset 4px 0 0 var(--ams-amber);
}

.page-faq .faq-keynums__label {
  display: block;
  font-family: var(--ams-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ams-silver);
}

.page-faq .faq-keynums__value {
  display: block;
  margin-top: 6px;
  font-family: var(--ams-font-display);
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.05;
  color: var(--ams-lime);
}

.page-faq .faq-keynums__note {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ams-cream-70);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-answers {
  padding-top: clamp(28px, 5vw, 56px);
}

.page-faq .faq-section-title {
  margin: 0 0 clamp(18px, 3vw, 28px);
  font-family: var(--ams-font-display);
  font-size: clamp(22px, 3.6vw, 38px);
  letter-spacing: -0.01em;
  color: var(--ams-cream);
  border-left: 6px solid var(--ams-orange);
  padding-left: 14px;
}

.page-faq .faq-board {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
}

/* 分类目录 */
.page-faq .faq-rail {
  border: 2px solid var(--ams-line-dark);
  background: rgba(18, 56, 42, 0.5);
  padding: 16px;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--ams-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ams-orange);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-left: 3px solid var(--ams-line-dark);
  color: var(--ams-cream-82);
  text-decoration: none;
  font-size: 14.5px;
  transition: border-color 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-left-color: var(--ams-lime);
  background: var(--faq-tint);
  color: var(--ams-cream);
}

.page-faq .faq-rail__link[aria-current="true"] {
  border-left-color: var(--ams-lime);
  background: var(--faq-tint-strong);
  color: var(--ams-lime-soft);
}

.page-faq .faq-rail__num {
  font-family: var(--ams-font-mono);
  font-size: 11px;
  color: var(--ams-silver);
}

.page-faq .faq-rail__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--ams-line-dark);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ams-cream-70);
}

.page-faq .faq-rail__note a {
  color: var(--ams-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 仅用于 CSS 筛选的隐藏控件 */
.page-faq .faq-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-main {
  position: relative;
  min-width: 0;
}

/* 筛选按钮组 */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-bottom: 14px;
  margin-bottom: clamp(18px, 3vw, 28px);
  border-bottom: 3px solid var(--ams-line-dark);
}

.page-faq .faq-filter__hint {
  font-family: var(--ams-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ams-silver);
  margin-right: 2px;
}

.page-faq .faq-filter__btn {
  font-family: var(--ams-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 7px 14px;
  border: 2px solid var(--ams-line-dark);
  color: var(--ams-cream-82);
  background: transparent;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.page-faq .faq-filter__btn:hover {
  border-color: var(--ams-lime);
  color: var(--ams-lime);
}

.page-faq .faq-radio:focus-visible ~ .faq-filter .faq-filter__btn {
  outline: 2px dashed var(--ams-lime);
  outline-offset: 2px;
}

.page-faq :is(
  #faq-f-all:checked ~ .faq-filter [for="faq-f-all"],
  #faq-f-ticket:checked ~ .faq-filter [for="faq-f-ticket"],
  #faq-f-youth:checked ~ .faq-filter [for="faq-f-youth"],
  #faq-f-data:checked ~ .faq-filter [for="faq-f-data"],
  #faq-f-topics:checked ~ .faq-filter [for="faq-f-topics"],
  #faq-f-contact:checked ~ .faq-filter [for="faq-f-contact"]
) {
  background: var(--ams-lime);
  border-color: var(--ams-lime);
  color: var(--ams-night);
}

/* 筛选逻辑：默认全部可见 */
.page-faq .faq-groups .faq-group {
  display: block;
}

.page-faq #faq-f-ticket:checked ~ .faq-groups .faq-group {
  display: none;
}

.page-faq #faq-f-ticket:checked ~ .faq-groups .faq-group--ticket,
.page-faq #faq-f-youth:checked ~ .faq-groups .faq-group--youth,
.page-faq #faq-f-data:checked ~ .faq-groups .faq-group--data,
.page-faq #faq-f-topics:checked ~ .faq-groups .faq-group--topics,
.page-faq #faq-f-contact:checked ~ .faq-groups .faq-group--contact {
  display: block;
}

.page-faq #faq-f-youth:checked ~ .faq-groups .faq-group,
.page-faq #faq-f-data:checked ~ .faq-groups .faq-group,
.page-faq #faq-f-topics:checked ~ .faq-groups .faq-group,
.page-faq #faq-f-contact:checked ~ .faq-groups .faq-group {
  display: none;
}

/* 分组 */
.page-faq .faq-group {
  counter-reset: faqq;
  padding-top: clamp(16px, 2.6vw, 24px);
  margin-top: clamp(26px, 4.5vw, 44px);
  border-top: 3px solid var(--ams-line-dark);
  scroll-margin-top: 120px;
}

.page-faq .faq-groups .faq-group:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.page-faq .faq-group__head {
  display: grid;
  gap: 6px;
  margin-bottom: 14px;
}

.page-faq .faq-group__num {
  font-family: var(--ams-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--ams-orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--ams-font-display);
  font-size: clamp(21px, 3.2vw, 32px);
  line-height: 1.15;
  color: var(--ams-cream);
}

.page-faq .faq-group__intro {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ams-cream-70);
}

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

/* 问答条目 */
.page-faq .faq-item {
  counter-increment: faqq;
  border: 2px solid var(--ams-line-dark);
  border-left: 6px solid var(--ams-orange);
  background: rgba(18, 56, 42, 0.55);
  margin-top: 12px;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-item:hover {
  border-color: var(--ams-silver);
  border-left-color: var(--ams-orange);
}

.page-faq .faq-item[open] {
  border-left-color: var(--ams-lime);
  background: var(--faq-tint);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  gap: 12px;
  padding: 14px 48px 14px 16px;
  margin: 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ams-cream);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 11px;
  font-family: var(--ams-font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--ams-lime);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2212";
  color: var(--ams-orange);
}

.page-faq .faq-item__idx {
  flex: none;
  padding-top: 4px;
  font-family: var(--ams-font-mono);
  font-size: 11.5px;
  color: var(--ams-orange);
}

.page-faq .faq-item__idx::before {
  content: "Q" counter(faqq, decimal-leading-zero);
}

.page-faq .faq-item__a {
  padding: 0 18px 16px;
  border-top: 1px dashed var(--ams-line-dark);
}

.page-faq .faq-item__a p {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ams-cream-82);
}

.page-faq .faq-item__a a {
  color: var(--ams-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 数据类嵌入标签 */
.page-faq .faq-kbd {
  font-family: var(--ams-font-mono);
  font-size: 0.9em;
  padding: 1px 6px;
  margin: 0 1px;
  border: 1px solid rgba(198, 255, 61, 0.4);
  background: rgba(198, 255, 61, 0.12);
  color: var(--ams-lime-soft);
  white-space: nowrap;
}

/* 数据分组中的配图 */
.page-faq .faq-group__split {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
}

.page-faq .faq-data__figure {
  margin: 0;
  border: 3px solid var(--ams-line-dark);
  background: var(--ams-turf);
  box-shadow: var(--ams-shadow-soft);
}

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

.page-faq .faq-data__figure .ams-media__caption {
  display: block;
  padding: 10px 14px;
  border-top: 2px solid var(--ams-line-dark);
  font-family: var(--ams-font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ams-cream-70);
}

/* ---------- 尾段行动区 ---------- */
.page-faq .faq-next {
  margin-top: clamp(32px, 6vw, 72px);
  background: var(--ams-turf);
  border-top: 3px solid var(--ams-lime);
}

.page-faq .faq-next__grid {
  display: grid;
  gap: clamp(20px, 3.4vw, 40px);
  align-items: start;
}

.page-faq .faq-next__title {
  margin: 8px 0 0;
  font-family: var(--ams-font-display);
  font-size: clamp(24px, 4vw, 42px);
  line-height: 1.12;
  color: var(--ams-cream);
}

.page-faq .faq-next__text {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ams-cream-82);
}

.page-faq .faq-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-next__link {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 12px;
  padding: 14px 16px;
  border: 2px solid var(--ams-line-dark);
  background: rgba(11, 31, 23, 0.55);
  text-decoration: none;
  color: var(--ams-cream);
  transition: transform 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}

.page-faq .faq-next__link:hover,
.page-faq .faq-next__link:focus-visible {
  transform: translate(-3px, -3px);
  border-color: var(--ams-lime);
  background: rgba(11, 31, 23, 0.85);
}

.page-faq .faq-next__num {
  grid-row: 1 / span 2;
  font-family: var(--ams-font-mono);
  font-size: 12px;
  color: var(--ams-orange);
  padding-top: 3px;
}

.page-faq .faq-next__name {
  font-family: var(--ams-font-display);
  font-size: 18px;
  letter-spacing: 0.01em;
}

.page-faq .faq-next__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ams-cream-70);
}

.page-faq .faq-next__contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: clamp(22px, 4vw, 36px);
  padding-top: 18px;
  border-top: 2px dashed var(--ams-line-dark);
}

.page-faq .faq-copy {
  font-family: var(--ams-font-mono);
  font-size: 13px;
  padding: 9px 14px;
  border: 2px dashed var(--ams-lime);
  background: rgba(198, 255, 61, 0.1);
  color: var(--ams-lime-soft);
  cursor: pointer;
  overflow-wrap: anywhere;
  transition: background-color 0.16s ease, color 0.16s ease;
}

.page-faq .faq-copy:hover {
  background: var(--ams-lime);
  color: var(--ams-night);
}

.page-faq .faq-next__phone {
  font-family: var(--ams-font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--ams-cream);
}

.page-faq .faq-top-btn {
  margin-left: auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-keynums {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 5fr 7fr;
  }

  .page-faq .faq-group--data .faq-group__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 330px);
    align-items: start;
  }

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

  .page-faq .faq-next__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

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

@media (min-width: 1040px) {
  .page-faq .faq-board {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 108px;
  }
}

@media (max-width: 600px) {
  .page-faq .faq-item__q {
    font-size: 15px;
    padding: 13px 42px 13px 14px;
  }

  .page-faq .faq-item__a {
    padding: 0 14px 14px;
  }

  .page-faq .faq-kbd {
    white-space: normal;
  }

  .page-faq .faq-top-btn {
    margin-left: 0;
  }
}

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

  .page-faq .faq-next__link:hover,
  .page-faq .faq-next__link:focus-visible {
    transform: none;
  }
}