.page-faq {
  --faq-line: rgba(17, 24, 39, .14);
  --faq-card: #FFFFFF;
  background: var(--page);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-top: clamp(1rem, 2.5vw, 1.6rem);
  padding-bottom: clamp(.6rem, 1.5vw, 1rem);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: linear-gradient(165deg, var(--night) 0%, var(--stand) 58%, #0c1727 100%);
  color: var(--frost);
  border-bottom: 3px solid var(--signal);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -200px;
  right: -180px;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(31, 138, 76, .55), transparent 66%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(234, 244, 255, .06) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(0deg, rgba(234, 244, 255, .045) 0 1px, transparent 1px 76px);
  -webkit-mask-image: radial-gradient(circle at 72% 28%, #000 0%, transparent 78%);
  mask-image: radial-gradient(circle at 72% 28%, #000 0%, transparent 78%);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
  padding-top: clamp(2.2rem, 5vw, 3.6rem);
  padding-bottom: clamp(2.4rem, 5.5vw, 4rem);
}

.page-faq .faq-hero h1 {
  margin: .7rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 7vw, 3.9rem);
  line-height: 1.02;
  letter-spacing: .02em;
  color: var(--frost);
}

.page-faq .faq-hero__lead {
  margin: 1rem 0 0;
  max-width: 46ch;
  font-size: clamp(.98rem, 1.6vw, 1.08rem);
  line-height: 1.78;
  color: rgba(234, 244, 255, .78);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-faq .faq-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  padding: .85rem .8rem;
  background: rgba(20, 34, 56, .88);
}

.page-faq .faq-hero__num {
  font-family: var(--font-data);
  font-weight: 600;
  font-size: clamp(1rem, 2.4vw, 1.25rem);
  color: var(--green-hi);
}

.page-faq .faq-hero__label {
  font-size: .74rem;
  line-height: 1.45;
  color: rgba(234, 244, 255, .68);
}

.page-faq .faq-hero__visual {
  margin: 0;
  padding: .6rem;
  border: 1px solid var(--line-dark);
  background: rgba(234, 244, 255, .04);
  box-shadow: 14px 14px 0 -6px rgba(255, 107, 44, .22);
}

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

.page-faq .faq-hero__visual figcaption {
  margin-top: .6rem;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .04em;
  color: rgba(234, 244, 255, .6);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding: clamp(2rem, 5vw, 3.6rem) 0 clamp(2.5rem, 5vw, 4rem);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.4rem);
  align-items: start;
}

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

.page-faq .faq-nav {
  padding: .85rem .9rem 1rem;
  background: var(--faq-card);
  border: 1px solid var(--faq-line);
  box-shadow: 0 18px 32px -28px rgba(10, 18, 32, .55);
}

.page-faq .faq-nav__title {
  margin: 0 0 .7rem;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.page-faq .faq-nav__list {
  list-style: none;
  margin: 0;
  padding: 0 0 .2rem;
  display: flex;
  gap: .4rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-nav__link {
  display: block;
  flex: 0 0 auto;
  padding: .5rem .8rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .86rem;
  line-height: 1.3;
  white-space: nowrap;
  text-decoration: none;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--faq-line);
  border-radius: var(--r);
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}

.page-faq .faq-nav__link:hover {
  color: var(--green);
  border-color: var(--green);
}

.page-faq .faq-nav__link[aria-current="true"] {
  color: #FFFFFF;
  background: var(--green);
  border-color: var(--green);
}

/* ---------- 筛选 ---------- */
.page-faq .faq-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(1.25rem, 2.5vw, 1.9rem);
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem .9rem;
  padding: .8rem 1rem;
  background: var(--paper);
  border: 1px dashed rgba(255, 107, 44, .55);
}

.page-faq .faq-filter .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.page-faq .faq-filter .filter-chip {
  padding: .38rem .8rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .82rem;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--faq-line);
  border-radius: var(--r);
  cursor: pointer;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}

.page-faq .faq-filter .filter-chip:hover {
  color: var(--signal);
  border-color: var(--signal);
}

.page-faq .faq-filter .filter-chip[aria-pressed="true"] {
  color: #FFFFFF;
  background: var(--signal);
  border-color: var(--signal);
}

.page-faq .faq-filter__status {
  margin: 0 0 0 auto;
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--ink-soft);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: clamp(1.25rem, 2.6vw, 1.9rem);
}

.page-faq .faq-group {
  scroll-margin-top: 90px;
  padding: clamp(1rem, 2.4vw, 1.5rem);
  background: var(--frost);
  border: 1px solid var(--faq-line);
  border-radius: var(--r);
  box-shadow: 8px 8px 0 -2px rgba(31, 138, 76, .14);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .5rem .85rem;
  padding-bottom: .85rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid rgba(17, 24, 39, .18);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-h3);
  line-height: 1.2;
  color: var(--ink);
}

.page-faq .faq-group__lead {
  flex-basis: 100%;
  margin: 0;
  font-size: .9rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  background: var(--faq-card);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--green);
  border-radius: var(--r);
  box-shadow: 0 10px 22px -20px rgba(10, 18, 32, .6);
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: .6rem;
}

.page-faq .faq-item[open] {
  border-left-color: var(--signal);
  box-shadow: 0 16px 30px -24px rgba(10, 18, 32, .68);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: .8rem;
  padding: .95rem 1.05rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item > summary::before {
  content: "Q";
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: .14rem;
  font-family: var(--font-data);
  font-size: .72rem;
  color: #FFFFFF;
  background: var(--green);
  border-radius: var(--r);
  transition: background 180ms var(--ease);
}

.page-faq .faq-item[open] > summary::before {
  background: var(--signal);
}

.page-faq .faq-item > summary::after {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-left: auto;
  margin-top: .42rem;
  border-right: 2px solid var(--ink-soft);
  border-bottom: 2px solid var(--ink-soft);
  transform: rotate(45deg);
  transition: transform 180ms var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(-135deg);
}

.page-faq .faq-item__body {
  padding: 0 clamp(1.05rem, 5vw, 2.9rem) 1.1rem clamp(1.05rem, 5vw, 2.9rem);
  font-size: .94rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-faq .faq-item__body p {
  margin: 0 0 .6rem;
}

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

.page-faq .faq-item__body a {
  color: var(--green);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__body a:hover {
  color: var(--signal);
}

.page-faq .faq-item[open] .faq-item__body {
  animation: faq-in 200ms var(--ease);
}

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

/* ---------- 图表配图 ---------- */
.page-faq .faq-figure {
  margin: 1.25rem 0 0;
  padding: .6rem;
  background: var(--paper);
  border: 1px solid var(--faq-line);
}

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

.page-faq .faq-figure figcaption {
  margin-top: .55rem;
  font-family: var(--font-data);
  font-size: .75rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* ---------- 底部联系 ---------- */
.page-faq .faq-cta {
  padding: clamp(2.4rem, 6vw, 4rem) 0;
  background: linear-gradient(150deg, var(--stand) 0%, var(--night) 100%);
  color: var(--frost);
  border-top: 3px solid var(--signal);
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.page-faq .faq-cta h2 {
  margin: .6rem 0 .8rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.08;
  letter-spacing: .02em;
  color: var(--frost);
}

.page-faq .faq-cta__copy p:last-of-type {
  margin: 0;
  max-width: 46ch;
  font-size: .98rem;
  line-height: 1.8;
  color: rgba(234, 244, 255, .76);
}

.page-faq .faq-cta__side {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: flex-start;
}

.page-faq .faq-cta__list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: .1rem;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-faq .faq-cta__list li {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem .8rem;
  padding: .8rem .9rem;
  background: rgba(10, 18, 32, .6);
}

.page-faq .faq-cta__k {
  flex: 0 0 auto;
  min-width: 3rem;
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--green-hi);
}

.page-faq .faq-cta__v {
  font-size: .92rem;
  line-height: 1.6;
  color: var(--frost);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.12fr .88fr;
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: 1.05fr .95fr;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 258px minmax(0, 1fr);
  }

  .page-faq .faq-side {
    position: sticky;
    top: 1.25rem;
  }

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

  .page-faq .faq-nav__link {
    padding: .6rem .8rem;
    white-space: normal;
    background: transparent;
    border: none;
    border-left: 3px solid transparent;
    border-radius: 0;
  }

  .page-faq .faq-nav__link:hover {
    background: rgba(31, 138, 76, .07);
  }

  .page-faq .faq-nav__link[aria-current="true"] {
    color: var(--green);
    background: rgba(31, 138, 76, .1);
    border-left-color: var(--green);
  }
}

@media (max-width: 560px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-filter__status {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item > summary::before,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-nav__link {
    transition: none;
  }

  .page-faq .faq-item[open] .faq-item__body {
    animation: none;
  }
}