.page-faq {
  --faq-gap: clamp(10px, 1.6vw, 14px);
  position: relative;
  color: var(--cream);
  background:
    radial-gradient(120% 78% at 90% -4%, rgba(53, 224, 200, .1), transparent 58%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 48%, var(--ink) 100%);
  padding-bottom: clamp(40px, 7vw, 84px);
}

.page-faq h1,
.page-faq h2 {
  margin: 0;
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: .01em;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(80px, 11vw, 122px);
  padding-bottom: clamp(26px, 5vw, 48px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -14%;
  right: -16%;
  width: min(560px, 66%);
  aspect-ratio: 1 / .78;
  background: linear-gradient(140deg, rgba(53, 224, 200, .22), rgba(255, 138, 61, .16) 62%, transparent);
  clip-path: polygon(18% 0, 100% 0, 100% 78%, 0 100%);
  pointer-events: none;
}

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

.page-faq .crumbs {
  margin-bottom: clamp(18px, 3.4vw, 32px);
  font-size: var(--step--1);
  color: var(--mist);
}

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

.page-faq .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(143, 163, 191, .5);
}

.page-faq .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .crumbs a:hover {
  color: var(--teal);
  border-bottom-color: rgba(53, 224, 200, .4);
}

.page-faq .crumbs [aria-current="page"] {
  color: var(--cream);
}

.page-faq .faq-hero h1 {
  margin-top: 16px;
  font-size: var(--step-5);
  max-width: 15em;
  text-wrap: balance;
}

.page-faq .faq-hero .lede {
  margin: clamp(14px, 2.4vw, 24px) 0 0;
  max-width: 60ch;
  color: var(--mist);
  font-size: var(--step-1);
  line-height: 1.8;
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: clamp(22px, 3.4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .06em;
  color: var(--mist);
}

.page-faq .faq-hero__stats li {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}

.page-faq .faq-hero__stats .numeric {
  font-size: var(--step-2);
  font-weight: 700;
  line-height: 1;
  color: var(--teal);
}

/* ---------- 主体布局 ---------- */

.page-faq .faq-main {
  padding-top: clamp(12px, 2vw, 24px);
  padding-bottom: clamp(20px, 4vw, 40px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: start;
}

.page-faq .faq-index {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-l);
  background: linear-gradient(160deg, rgba(20, 42, 84, .78), rgba(6, 12, 24, .6));
  padding: 16px 16px 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  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 .faq-index__btn {
  position: relative;
  display: block;
  white-space: nowrap;
  padding: 9px 15px;
  font-family: inherit;
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: color .22s var(--ease), border-color .22s var(--ease), background-color .22s var(--ease);
}

.page-faq .faq-index__btn:hover {
  color: var(--cream);
  border-color: rgba(53, 224, 200, .55);
}

.page-faq .faq-index__btn[aria-pressed="true"] {
  color: var(--cream);
  border-color: var(--amber);
  background: rgba(255, 138, 61, .12);
}

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

.page-faq .faq-index__hint {
  margin: 12px 0 0;
  font-size: var(--step--1);
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 主题分组 ---------- */

.page-faq .faq-group {
  margin-bottom: clamp(34px, 6vw, 64px);
  scroll-margin-top: 120px;
}

.page-faq .faq-group:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-group:not(:has([data-filter-item]:not(.is-filtered-out))) {
  display: none;
}

.page-faq .faq-group__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-group__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .08em;
  color: var(--teal);
}

.page-faq .faq-group__head h2 {
  font-size: var(--step-2);
}

.page-faq .faq-group__note {
  margin: 8px 0 0;
  max-width: 52ch;
  font-size: var(--step-0);
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-figure {
  margin: 0 0 18px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(53, 224, 200, .1), rgba(20, 42, 84, .55) 48%, rgba(255, 138, 61, .1));
}

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

/* ---------- 问答卡片 ---------- */

.page-faq .faq-item {
  margin-bottom: var(--faq-gap);
  overflow: hidden;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(20, 42, 84, .6), rgba(11, 27, 58, .44));
  transition: border-color .24s var(--ease), background .24s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--line-soft);
}

.page-faq .faq-item[open] {
  border-color: rgba(53, 224, 200, .45);
  background: linear-gradient(180deg, rgba(20, 42, 84, .84), rgba(11, 27, 58, .6));
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 16px;
  cursor: pointer;
  list-style: none;
  font-size: var(--step-1);
  font-weight: 600;
  line-height: 1.55;
  color: var(--cream);
  -webkit-tap-highlight-color: transparent;
}

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

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: -3px;
  border-radius: var(--radius);
}

.page-faq .faq-item__icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  margin-top: 1px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
}

.page-faq .faq-item__icon[data-kind="path"] {
  color: var(--teal);
  border-color: rgba(53, 224, 200, .32);
}

.page-faq .faq-item__icon[data-kind="setup"] {
  color: var(--amber);
  border-color: rgba(255, 138, 61, .32);
}

.page-faq .faq-item__icon[data-kind="account"] {
  color: var(--moss);
  border-color: rgba(127, 168, 140, .34);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__toggle {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border: 1px solid var(--line-soft);
  border-radius: 7px;
  color: var(--mist);
  transition: color .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .faq-item__toggle::before,
.page-faq .faq-item__toggle::after {
  content: "";
  position: absolute;
  background: currentColor;
  border-radius: 1px;
}

.page-faq .faq-item__toggle::before {
  top: 50%;
  left: 5px;
  right: 5px;
  height: 1.6px;
  margin-top: -.8px;
}

.page-faq .faq-item__toggle::after {
  top: 5px;
  bottom: 5px;
  left: 50%;
  width: 1.6px;
  margin-left: -.8px;
  transform-origin: center;
  transition: transform .24s var(--ease), opacity .24s var(--ease);
}

.page-faq .faq-item[open] .faq-item__toggle {
  color: var(--teal);
  border-color: rgba(53, 224, 200, .5);
}

.page-faq .faq-item[open] .faq-item__toggle::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__body {
  padding: 0 16px 18px;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--mist);
}

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

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

.page-faq .faq-item__links {
  padding-top: 2px;
  font-size: var(--step--1);
}

.page-faq .faq-item__links a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 200, .35);
  transition: border-color .2s var(--ease);
}

.page-faq .faq-item__links a:hover {
  border-bottom-color: var(--teal);
}

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

.page-faq .faq-item[open] .faq-item__body {
  animation: faq-drop .28s var(--ease) both;
}

/* ---------- 收尾行动条 ---------- */

.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 22px;
  padding: 18px 20px;
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: linear-gradient(100deg, rgba(255, 138, 61, .13), rgba(11, 27, 58, 0) 74%);
}

.page-faq .faq-cta p {
  margin: 0;
  max-width: 44ch;
  font-size: var(--step-0);
  line-height: 1.7;
  color: var(--cream);
}

/* ---------- 桌面端 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-item > summary {
    padding: 18px 20px;
    gap: 15px;
  }

  .page-faq .faq-item__body {
    padding: 0 20px 20px 61px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(196px, 234px) minmax(0, 1fr);
    gap: clamp(30px, 5vw, 64px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
    padding: 4px 0 4px 0;
    border: 0;
    border-radius: 0;
    background: none;
  }

  .page-faq .faq-index__title {
    margin: 0 0 16px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0 0 0 18px;
    border-left: 1px solid var(--line-soft);
  }

  .page-faq .faq-index__list > li {
    flex: none;
    width: 100%;
  }

  .page-faq .faq-index__btn {
    width: 100%;
    padding: 10px 12px;
    text-align: left;
    white-space: normal;
    font-size: var(--step-0);
    letter-spacing: .01em;
    border: 0;
    border-radius: 8px;
    background: transparent;
  }

  .page-faq .faq-index__btn:hover {
    background: rgba(143, 163, 191, .08);
    border-color: transparent;
  }

  .page-faq .faq-index__btn[aria-pressed="true"] {
    color: var(--cream);
    background: rgba(255, 138, 61, .08);
    border-color: transparent;
  }

  .page-faq .faq-index__btn[aria-pressed="true"]::before {
    content: "";
    position: absolute;
    top: 50%;
    left: -20px;
    width: 3px;
    height: 20px;
    border-radius: 2px;
    background: var(--amber);
    transform: translateY(-50%);
  }

  .page-faq .faq-index__hint {
    margin-top: 18px;
    padding-left: 18px;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-hero h1 {
    max-width: 13em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-item__body {
    animation: none;
  }

  .page-faq .faq-item,
  .page-faq .faq-item__toggle,
  .page-faq .faq-item__toggle::after,
  .page-faq .faq-index__btn,
  .page-faq .crumbs a {
    transition: none;
  }
}