.page-faq {
  --faq-body: #B9C1D0;
  --faq-line: rgba(138, 147, 166, .28);
  --faq-neon-soft: rgba(0, 255, 163, .08);
  position: relative;
  overflow-x: hidden;
  background:
    radial-gradient(1100px 520px at 88% 12%, rgba(0, 255, 163, .07), transparent 60%),
    radial-gradient(800px 400px at 8% 86%, rgba(255, 159, 28, .05), transparent 60%),
    #0A0E1A;
  color: #F5F7FA;
}

/* ---------- Hero ---------- */
.faq-hero {
  position: relative;
  padding: 6.5rem 0 4.5rem;
  background: linear-gradient(150deg, rgba(0, 255, 163, .14), transparent 42%), rgba(10, 14, 26, .62);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 2.5rem), 0 100%);
  overflow: hidden;
}

.faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.faq-hero__shade {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(10, 14, 26, .52), rgba(10, 14, 26, .94) 78%);
}

.faq-hero__inner {
  position: relative;
  z-index: 2;
}

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1.25rem;
  font-family: var(--font-data);
  font-size: .8125rem;
  color: #8A93A6;
}

.page-faq .breadcrumb a {
  color: #8A93A6;
  text-decoration: none;
  transition: color .2s ease;
}

.page-faq .breadcrumb a:hover {
  color: #00FFA3;
}

.page-faq .breadcrumb__separator {
  color: #00FFA3;
}

.page-faq .breadcrumb__current {
  color: #F5F7FA;
}

.faq-hero__eyebrow {
  margin: 0 0 .5rem;
  font-family: var(--font-data);
  font-size: .8125rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #00FFA3;
}

.faq-hero__title {
  margin: 0 0 .875rem;
  font-family: var(--font-headline);
  font-size: clamp(2.2rem, 6vw, 3.75rem);
  line-height: 1.04;
  letter-spacing: .02em;
  text-transform: uppercase;
  color: #F5F7FA;
}

.faq-hero__lead {
  max-width: 44rem;
  margin: 0;
  color: #8A93A6;
  font-size: 1.0625rem;
  line-height: 1.75;
}

/* ---------- 数据滚动条 ---------- */
.faq-ticker {
  overflow: hidden;
  border-block: 1px solid var(--faq-line);
  background: rgba(20, 27, 45, .55);
  padding: .625rem 0;
}

.faq-ticker__track {
  display: inline-flex;
  white-space: nowrap;
  animation: pageFaqTicker 48s linear infinite;
}

.faq-ticker__track span {
  position: relative;
  margin-right: 3rem;
  font-family: var(--font-data);
  font-size: .8125rem;
  letter-spacing: .08em;
  color: #8A93A6;
}

.faq-ticker__track span::after {
  content: '/';
  position: absolute;
  right: -1.75rem;
  color: #00FFA3;
}

@keyframes pageFaqTicker {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- 快速定位卡片 ---------- */
.faq-quicknav {
  position: relative;
  z-index: 3;
  margin-top: 2rem;
  padding: 2rem 0 1.5rem;
}

.faq-quicknav__grid {
  display: grid;
  gap: 1rem;
}

.faq-quicknav__item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .4rem;
  padding: 1.5rem 1.5rem 1.75rem;
  background: linear-gradient(160deg, rgba(20, 27, 45, .95), rgba(10, 14, 26, .9));
  border: 1px solid var(--faq-line);
  color: #F5F7FA;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 1.25rem) 0, 100% 1.25rem, 100% 100%, 0 100%);
  transition: border-color .3s ease, transform .3s ease, background .3s ease;
}

.faq-quicknav__item:hover,
.faq-quicknav__item:focus-visible {
  border-color: rgba(0, 255, 163, .55);
  background: linear-gradient(160deg, rgba(0, 255, 163, .08), rgba(20, 27, 45, .95));
  transform: translateY(-3px);
}

.faq-quicknav__icon {
  width: 2.25rem;
  height: 2.25rem;
  margin-bottom: .5rem;
  color: #00FFA3;
}

.faq-quicknav__label {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  letter-spacing: .04em;
  line-height: 1.1;
}

.faq-quicknav__meta {
  font-family: var(--font-data);
  font-size: .8125rem;
  color: #FF9F1C;
}

.faq-quicknav__desc {
  color: #8A93A6;
  font-size: .9375rem;
  line-height: 1.5;
}

/* ---------- FAQ 主体区域 ---------- */
.faq-main {
  position: relative;
  padding: 3rem 0 2rem;
}

.faq-main::after {
  content: '';
  position: absolute;
  right: 2rem;
  bottom: 6rem;
  z-index: 0;
  width: 220px;
  height: 220px;
  pointer-events: none;
  opacity: .45;
  background-image:
    radial-gradient(circle, rgba(0, 255, 163, .55) 1px, transparent 1.6px),
    radial-gradient(circle, rgba(138, 147, 166, .4) 1px, transparent 1.6px);
  background-size: 48px 48px, 64px 64px;
  background-position: 0 0, 16px 12px;
  animation: pageFaqParticles 14s ease-in-out infinite alternate;
  display: none;
}

@keyframes pageFaqParticles {
  from { transform: translateY(0); }
  to { transform: translateY(-1.5rem); }
}

.faq-main__layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

/* ---------- 侧边目录 ---------- */
.faq-index {
  position: relative;
  min-width: 0;
}

.faq-index__title {
  display: flex;
  align-items: center;
  gap: .625rem;
  margin: 0 0 1rem;
  font-family: var(--font-headline);
  font-size: 1.25rem;
  letter-spacing: .06em;
  color: #F5F7FA;
}

.faq-index__title::before {
  content: '';
  width: .5rem;
  height: 1.5rem;
  background: linear-gradient(180deg, #00FFA3, #C97A5A);
}

.faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.faq-index__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .6875rem .875rem;
  border: 1px solid var(--faq-line);
  background: rgba(20, 27, 45, .6);
  color: #8A93A6;
  text-decoration: none;
  font-size: .9375rem;
  white-space: nowrap;
  transition: color .25s ease, border-color .25s ease, background .25s ease;
}

.faq-index__link:hover,
.faq-index__link:focus-visible {
  color: #F5F7FA;
  border-color: rgba(0, 255, 163, .5);
  background: var(--faq-neon-soft);
}

.faq-index__link span:last-child {
  font-family: var(--font-data);
  font-size: .75rem;
  color: #FF9F1C;
}

.faq-index__line {
  display: none;
}

/* ---------- FAQ 列表 ---------- */
.faq-list {
  min-width: 0;
  display: grid;
  gap: 2.5rem;
}

.faq-section__title {
  position: relative;
  margin: 0 0 .375rem;
  padding-left: 1rem;
  font-family: var(--font-headline);
  font-size: 1.875rem;
  letter-spacing: .04em;
  color: #F5F7FA;
}

.faq-section__title::before {
  content: '';
  position: absolute;
  left: 0;
  top: .2em;
  bottom: .2em;
  width: 3px;
  background: linear-gradient(180deg, #00FFA3, #C97A5A);
}

.faq-section__desc {
  margin: 0 0 1.25rem;
  color: #8A93A6;
  font-size: .9375rem;
}

/* ---------- 手风琴项 ---------- */
.faq-item {
  margin-top: .75rem;
  background: linear-gradient(150deg, rgba(20, 27, 45, .92), rgba(13, 18, 30, .98));
  border: 1px solid var(--faq-line);
  border-left-width: 2px;
  border-left-color: transparent;
  transition: border-color .3s ease;
}

.faq-item[open] {
  border-left-color: #00FFA3;
  border-color: rgba(0, 255, 163, .35);
}

.faq-item__summary {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1.125rem 1.25rem;
  cursor: pointer;
  list-style: none;
  color: #F5F7FA;
  font-weight: 500;
  font-size: 1rem;
  line-height: 1.5;
  transition: background .3s ease;
}

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

.faq-item__summary:hover {
  background: var(--faq-neon-soft);
}

.faq-item__num {
  flex: 0 0 auto;
  padding: .18em .45em;
  border: 1px solid rgba(255, 159, 28, .35);
  font-family: var(--font-data);
  font-size: .75rem;
  letter-spacing: .04em;
  color: #FF9F1C;
}

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

.faq-item__icon {
  flex: 0 0 auto;
  width: 1.125rem;
  height: 1.125rem;
  color: #00FFA3;
  transition: transform .35s ease;
}

.faq-item[open] .faq-item__icon {
  transform: rotate(180deg);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 1.25rem 1.25rem;
  color: var(--faq-body);
  font-size: .9375rem;
  line-height: 1.78;
  transition: max-height .45s ease;
}

.faq-item[open] .faq-item__answer {
  max-height: 40rem;
  animation: pageFaqAnswer .35s ease;
}

.faq-item__answer p {
  margin: 0 0 .75rem;
}

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

.faq-item__answer a {
  color: #00FFA3;
  text-decoration: underline;
  text-underline-offset: .2em;
  transition: color .2s ease;
}

.faq-item__answer a:hover {
  color: #F5F7FA;
}

@keyframes pageFaqAnswer {
  from { opacity: 0; transform: translateY(-.35rem); }
  to { opacity: 1; transform: none; }
}

/* ---------- 联系支持区 ---------- */
.faq-contact {
  position: relative;
  margin-top: 2rem;
  padding: 5rem 0 3rem;
  background:
    radial-gradient(600px 300px at 85% 20%, rgba(0, 255, 163, .08), transparent 65%),
    linear-gradient(150deg, rgba(20, 27, 45, .85), rgba(10, 14, 26, .96) 60%);
  clip-path: polygon(0 2rem, 100% 0, 100% 100%, 0 100%);
}

.faq-contact__grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.faq-contact__title {
  margin: 0 0 .75rem;
  font-family: var(--font-headline);
  font-size: 2.375rem;
  letter-spacing: .04em;
  color: #F5F7FA;
}

.faq-contact__intro {
  max-width: 36rem;
  margin: 0 0 1.5rem;
  color: var(--faq-body);
  line-height: 1.75;
}

.faq-contact__cards {
  display: grid;
  gap: 1rem;
}

.faq-contact__card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.125rem 1.25rem;
  background: rgba(10, 14, 26, .72);
  border: 1px solid var(--faq-line);
  border-left: 3px solid rgba(0, 255, 163, .55);
}

.faq-contact__icon {
  flex: 0 0 auto;
  width: 1.5rem;
  height: 1.5rem;
  margin-top: .1rem;
  color: #00FFA3;
}

.faq-contact__info {
  min-width: 0;
}

.faq-contact__label {
  display: block;
  margin-bottom: .25rem;
  font-family: var(--font-data);
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: #8A93A6;
}

.faq-contact__value {
  display: block;
  font-family: var(--font-data);
  font-size: 1.125rem;
  letter-spacing: .02em;
  color: #F5F7FA;
  word-break: break-all;
}

.faq-contact__note {
  display: block;
  margin-top: .375rem;
  color: #8A93A6;
  font-size: .875rem;
  line-height: 1.5;
}

.faq-contact__more {
  margin: 1.5rem 0 0;
  color: #8A93A6;
  font-size: .9375rem;
}

.faq-contact__more a {
  color: #00FFA3;
  text-decoration: underline;
  text-underline-offset: .2em;
  transition: color .2s ease;
}

.faq-contact__more a:hover {
  color: #F5F7FA;
}

.faq-contact__visual {
  min-width: 0;
}

.faq-contact__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--faq-line);
  clip-path: polygon(0 0, calc(100% - 1.5rem) 0, 100% 1.5rem, 100% 100%, 0 100%);
}

/* ---------- 桌面端增强 ---------- */
@media (min-width: 640px) {
  .faq-item__answer {
    padding-left: calc(1.25rem + 2.75rem);
    padding-right: 1.75rem;
  }

  .faq-contact__cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .faq-contact__card:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 760px) {
  .faq-quicknav__grid {
    grid-template-columns: repeat(12, 1fr);
  }

  .faq-quicknav__item:nth-child(1) { grid-column: 1 / 7; }
  .faq-quicknav__item:nth-child(2) { grid-column: 7 / 13; }
  .faq-quicknav__item:nth-child(3) { grid-column: 2 / 8; }
  .faq-quicknav__item:nth-child(4) { grid-column: 8 / 13; }

  .faq-ticker {
    padding: .75rem 0;
  }
}

@media (min-width: 920px) {
  .faq-hero {
    padding: 6rem 0 5rem;
  }

  .faq-main {
    padding: 4rem 0 3rem;
  }

  .faq-main::after {
    display: block;
  }

  .faq-main__layout {
    grid-template-columns: 14rem minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .faq-index {
    position: sticky;
    top: 1.5rem;
    z-index: 2;
  }

  .faq-index__list {
    display: grid;
    gap: .625rem;
    overflow: visible;
  }

  .faq-index__line {
    display: block;
    width: 100%;
    height: auto;
    margin-top: 1.75rem;
  }

  .faq-section__title {
    font-size: 2.125rem;
  }

  .faq-contact {
    padding-top: 7rem;
  }

  .faq-contact__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 3rem;
  }

  .faq-contact__cards {
    grid-template-columns: 1fr;
  }

  .faq-contact__card:last-child {
    grid-column: auto;
  }

  .faq-contact__img {
    max-height: 20rem;
    object-fit: cover;
  }
}