.page-faq {
  --faq-edge: rgba(74, 107, 98, 0.45);
  --faq-soft: rgba(159, 232, 210, 0.62);
  background: var(--ink);
  color: var(--mist);
  overflow-x: clip;
  padding-bottom: clamp(56px, 9vw, 120px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  border-bottom: 1px solid var(--faq-edge);
}

.page-faq .faq-hero__media {
  position: relative;
  height: clamp(190px, 38vw, 400px);
  overflow: hidden;
}

.page-faq .faq-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.7) brightness(0.5);
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 30, 25, 0.15) 0%, rgba(10, 30, 25, 0.72) 58%, var(--ink) 100%),
    repeating-linear-gradient(90deg, rgba(53, 240, 192, 0.07) 0 1px, transparent 1px 26px);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
  margin-top: clamp(-96px, -8vw, -44px);
  padding-bottom: clamp(26px, 4vw, 44px);
}

.page-faq .faq-hero__inner h1 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(30px, 6.4vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: #EAF7F2;
  margin: 12px 0 0;
  max-width: 16ch;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__jump a {
  display: inline-block;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  text-decoration: none;
  background: rgba(18, 48, 41, 0.72);
  border: 1px solid var(--faq-edge);
  clip-path: var(--cut-sm);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

@keyframes faq-fade-up {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}

.page-faq .faq-hero__inner > * {
  animation: faq-fade-up 0.52s ease both;
}

.page-faq .faq-hero__inner > *:nth-child(2) { animation-delay: 0.06s; }
.page-faq .faq-hero__inner > *:nth-child(3) { animation-delay: 0.12s; }
.page-faq .faq-hero__inner > *:nth-child(4) { animation-delay: 0.18s; }

/* ---------- 主骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding-top: clamp(28px, 4.5vw, 56px);
}

.page-faq .faq-crumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  margin: 0 0 18px;
}

.page-faq .faq-crumb a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  text-decoration: underline;
}

/* 窄屏左轨变成横向索引条 */
.page-faq .faq-rail {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-faq .faq-rail .rail__caption {
  flex: 0 0 auto;
  margin: 0;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--faq-soft);
  text-transform: uppercase;
}

.page-faq .faq-rail .rail__stops {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--mist);
  background: rgba(18, 48, 41, 0.55);
  border: 1px solid var(--faq-edge);
  clip-path: var(--cut-sm);
}

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

.page-faq .rail__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .rail__value {
  font-size: 13px;
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(22px, 3vw, 34px);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding: clamp(24px, 4vw, 40px) 0 clamp(8px, 1.5vw, 16px);
  border-top: 1px solid var(--faq-edge);
}

.page-faq .faq-group:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-group__head {
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-group__head h2 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(21px, 3.4vw, 32px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: #EAF7F2;
  margin: 8px 0 0;
}

.page-faq .faq-group__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-group__tags .tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--faq-soft);
  padding: 4px 10px;
  border: 1px dashed var(--faq-edge);
  border-radius: 999px;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  background: var(--panel);
  clip-path: var(--cut-sm);
  border-left: 3px solid transparent;
  margin-bottom: 10px;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-item:hover {
  background: #163a31;
}

.page-faq .faq-item[open] {
  background: var(--board);
  border-left-color: var(--cyan);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 16px;
  line-height: 1.5;
  color: #EAF7F2;
}

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

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

.page-faq .faq-item__no {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-item__no::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 2px;
  margin-right: 8px;
  background: var(--cyan);
}

.page-faq .faq-item__mark {
  position: relative;
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 5px;
  width: 12px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  left: 5px;
  top: 0;
  width: 2px;
  height: 12px;
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: rotate(90deg);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 18px 18px 46px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 64ch;
}

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

@keyframes faq-rise {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-rise 0.28s ease both;
}

/* 筛选后没有可见条目的分组自动收起 */
.page-faq .faq-group:not(:has(.faq-item:not([hidden]))) {
  display: none;
}

/* ---------- 费用分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-faq .faq-shot {
  margin: 0;
  align-self: start;
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: var(--cut-sm);
  filter: saturate(0.78) brightness(0.78);
}

.page-faq .faq-shot figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.05em;
  color: var(--faq-soft);
}

/* ---------- 横向入口条 ---------- */
.page-faq .faq-crosslink {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "label arrow"
    "text arrow";
  align-items: center;
  gap: 6px 16px;
  margin: clamp(20px, 3vw, 32px) 0 clamp(6px, 1vw, 12px);
  padding: 20px 22px;
  text-decoration: none;
  color: var(--mist);
  background: linear-gradient(100deg, rgba(53, 240, 192, 0.16), rgba(255, 90, 54, 0.12));
  clip-path: var(--cut-tr);
  border-left: 3px solid var(--orange);
  transition: background 0.2s ease;
}

.page-faq .faq-crosslink:hover,
.page-faq .faq-crosslink:focus-visible {
  background: linear-gradient(100deg, rgba(53, 240, 192, 0.26), rgba(255, 90, 54, 0.2));
}

.page-faq .faq-crosslink__label {
  grid-area: label;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--orange);
  text-transform: uppercase;
}

.page-faq .faq-crosslink__text {
  grid-area: text;
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .faq-crosslink__arrow {
  grid-area: arrow;
  font-size: 22px;
  color: var(--cyan);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-more {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-soft);
}

.page-faq .faq-more a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-tail {
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 20px 22px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
  background: rgba(18, 48, 41, 0.7);
  border-left: 3px solid var(--amber);
  clip-path: var(--cut-sm);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1040px) {
  .page-faq .faq-body {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-faq .faq-rail {
    flex-direction: column;
    overflow: visible;
    position: sticky;
    top: 128px;
    align-self: start;
  }

  .page-faq .faq-rail .rail__caption {
    align-self: flex-start;
    margin-bottom: 14px;
  }

  .page-faq .faq-rail .rail__stops {
    flex-direction: column;
    gap: 0;
    position: relative;
    padding-left: 20px;
  }

  .page-faq .faq-rail .rail__stops::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    bottom: 10px;
    width: 2px;
    background: linear-gradient(180deg, var(--cyan), rgba(53, 240, 192, 0.1));
  }

  .page-faq .faq-rail .rail__stop {
    position: relative;
  }

  .page-faq .faq-rail .rail__stop::before {
    content: "";
    position: absolute;
    left: -25px;
    top: 15px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--ink);
    border: 2px solid var(--line);
    transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .page-faq .faq-rail .rail__stop.is-current::before {
    background: var(--cyan);
    border-color: var(--cyan);
    box-shadow: 0 0 0 4px rgba(53, 240, 192, 0.16);
  }

  .page-faq .rail__link {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    padding: 8px 0;
    background: none;
    border: 0;
    clip-path: none;
  }

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

  .page-faq .rail__link:hover .rail__value,
  .page-faq .rail__link:focus-visible .rail__value,
  .page-faq .rail__stop.is-current .rail__value {
    color: #EAF7F2;
  }

  .page-faq .faq-item__q {
    padding: 18px 22px;
    font-size: 17px;
  }

  .page-faq .faq-item__a {
    padding: 0 22px 20px 52px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: clamp(22px, 3vw, 40px);
  }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation: none !important;
    transition: none !important;
  }
}