.page-faq,
.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq {
  --faq-green: #C8F560;
  --faq-purple: #9B6CFF;
  --faq-teal-bg: rgba(21, 61, 58, 0.4);
  --faq-indigo-bg: rgba(30, 42, 74, 0.45);
  --faq-wine-bg: rgba(74, 31, 45, 0.4);
  --faq-dark-bg: rgba(19, 26, 42, 0.7);
  --faq-line: rgba(255, 255, 255, 0.16);
  --faq-grid: rgba(255, 255, 255, 0.07);
  background-color: #0B0F1A;
  color: #EAEEF5;
  font-family: "Noto Sans SC", "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}

.page-faq a {
  color: var(--faq-purple);
  text-decoration: none;
  border-bottom: 1px solid rgba(155, 108, 255, 0.32);
  transition: color var(--ease), border-color var(--ease);
}

.page-faq a:hover {
  color: var(--faq-green);
  border-bottom-color: rgba(200, 245, 96, 0.55);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--faq-purple);
  outline-offset: 3px;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  font-family: "Space Grotesk", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.25;
  margin: 0;
}

/* ========== 首屏框景 ========== */
.faq-hero-blueprint {
  padding-top: calc(var(--header-h) + 40px);
  padding-bottom: 64px;
  background-color: #0B0F1A;
  background-image:
    linear-gradient(var(--faq-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-grid) 1px, transparent 1px);
  background-size: 32px 32px;
  position: relative;
}

.faq-hero-frame {
  position: relative;
  border: 1px solid var(--faq-line);
  padding: 28px 24px;
  background: rgba(19, 26, 42, 0.5);
}

.faq-hero-frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 48px;
  border-top: 3px solid var(--faq-purple);
  border-left: 3px solid var(--faq-purple);
}

.faq-hero-frame::after {
  content: "";
  position: absolute;
  bottom: 0;
  right: 0;
  width: 48px;
  height: 48px;
  border-bottom: 3px solid var(--faq-green);
  border-right: 3px solid var(--faq-green);
}

.faq-hero-frame__corner {
  display: none;
}

.faq-hero-frame__body {
  margin-top: 24px;
}

.faq-hero-frame__main .index-label {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--faq-purple);
  border-bottom: 1px solid rgba(155, 108, 255, 0.4);
  padding-bottom: 4px;
}

.faq-hero-frame__main h1 {
  font-size: clamp(38px, 6.5vw, 64px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #EAEEF5;
}

.faq-hero-frame__lead {
  margin-top: 12px;
  font-size: 18px;
  font-weight: 600;
  color: var(--faq-green);
  letter-spacing: 0.02em;
}

.faq-hero-frame__desc {
  margin-top: 14px;
  max-width: 560px;
  font-size: 15px;
  color: #B4C0D0;
}

.faq-hero-frame__key {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.faq-hero-frame__meta {
  margin-top: 28px;
  border-top: 1px solid var(--faq-line);
  padding-top: 18px;
}

.faq-hero-stats {
  margin: 0;
}

.faq-hero-stats__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.faq-hero-stats__row:last-child {
  border-bottom: none;
}

.faq-hero-stats__row dt {
  font-size: 13px;
  color: #B4C0D0;
}

.faq-hero-stats__row dd {
  margin: 0;
  font-size: 14px;
  color: #EAEEF5;
}

/* ========== 帮助目录索引 ========== */
.faq-index-zone {
  padding: 56px 0 48px;
  background-color: #131A2A;
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid rgba(34, 42, 58, 0.5);
}

.faq-index-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.faq-index-media {
  position: relative;
  padding: 12px;
  border: 1px solid var(--faq-line);
  background-color: rgba(255, 255, 255, 0.03);
}

.faq-index-media::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 20px;
  height: 20px;
  border-top: 2px solid var(--faq-green);
  border-left: 2px solid var(--faq-green);
}

.faq-index-media__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.faq-index-media__label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--faq-green);
  text-transform: uppercase;
}

.faq-index-nav__title {
  font-size: 24px;
  font-weight: 700;
  color: #EAEEF5;
  margin-bottom: 18px;
  position: relative;
  padding-left: 14px;
}

.faq-index-nav__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--faq-purple);
}

.faq-index-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--faq-line);
}

.faq-index-nav__list li {
  border-bottom: 1px solid var(--faq-line);
}

.faq-index-nav__list a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 10px;
  font-size: 15px;
  font-weight: 600;
  color: #EAEEF5;
  border-bottom: none;
  transition: background var(--ease), color var(--ease), padding-left var(--ease);
}

.faq-index-nav__list a:hover {
  background: rgba(155, 108, 255, 0.14);
  color: var(--faq-green);
  padding-left: 16px;
}

.faq-index-nav__list .mono {
  font-size: 13px;
  color: var(--faq-purple);
  min-width: 28px;
}

.faq-index-nav__tip {
  margin-top: 14px;
  font-size: 12px;
  color: #B4C0D0;
}

.faq-index-nav .btn {
  margin-top: 18px;
}

/* ========== 问答主体 ========== */
.faq-qa-zone {
  padding: 0;
}

.faq-qa-stack {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* 分类 */
.faq-cat {
  position: relative;
  padding: 40px 0 8px;
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.faq-cat::before {
  content: var(--faq-cat-index);
  position: absolute;
  top: 20px;
  right: 4px;
  font-family: "JetBrains Mono", monospace;
  font-size: 64px;
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--faq-cat-line);
  opacity: 0.16;
  pointer-events: none;
  z-index: 0;
}

.faq-cat--indigo {
  background: transparent;
}

.faq-cat--teal {
  background: var(--faq-teal-bg);
  border-top: 1px solid rgba(200, 245, 96, 0.28);
  border-bottom: 1px solid rgba(200, 245, 96, 0.28);
  padding-left: 20px;
  padding-right: 20px;
}

.faq-cat--dark {
  background: var(--faq-dark-bg);
  padding-left: 20px;
  padding-right: 20px;
}

.faq-cat--wine {
  background: var(--faq-wine-bg);
  border-top: 1px solid rgba(200, 245, 96, 0.28);
  border-bottom: 1px solid rgba(200, 245, 96, 0.28);
  padding-left: 20px;
  padding-right: 20px;
}

.faq-cat__head {
  position: relative;
  z-index: 1;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--faq-cat-line);
  margin-bottom: 8px;
}

.faq-cat__head .index-label {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--faq-cat-accent);
}

.faq-cat__head h2 {
  font-size: 28px;
  font-weight: 700;
  color: #EAEEF5;
}

.faq-cat__head p {
  margin-top: 8px;
  font-size: 14px;
  color: #B4C0D0;
  max-width: 480px;
}

/* FAQ 条目 */
.faq-cat__items {
  position: relative;
  z-index: 1;
}

.faq-item {
  border-bottom: 1px solid var(--faq-line);
  background: transparent;
  transition: background var(--ease);
}

.faq-item[open] {
  background: rgba(255, 255, 255, 0.025);
}

.faq-item:target {
  background: rgba(155, 108, 255, 0.1);
  box-shadow: inset 3px 0 0 var(--faq-purple);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 20px 8px 20px 10px;
  transition: background var(--ease);
}

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

.faq-item summary:hover {
  background: rgba(155, 108, 255, 0.07);
}

.faq-item__icon {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--faq-cat-line);
  color: var(--faq-cat-accent);
  font-size: 18px;
  font-weight: 400;
  line-height: 1;
  transform: rotate(0deg);
  transition: transform var(--ease), background var(--ease);
  position: relative;
  top: 4px;
}

.faq-item[open] .faq-item__icon {
  transform: rotate(45deg);
  background: rgba(200, 245, 96, 0.12);
  border-color: var(--faq-green);
  color: var(--faq-green);
}

.faq-item summary h3 {
  font-size: 16px;
  font-weight: 600;
  color: #EAEEF5;
  flex: 1;
}

.faq-item__body {
  padding: 0 24px 24px 48px;
  font-size: 15px;
  color: #B4C0D0;
}

.faq-item__body p {
  margin: 0;
  max-width: 760px;
}

/* ========== 流程图示区 ========== */
.faq-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  padding: 56px 0;
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
  margin: 16px 0;
  background: rgba(30, 42, 74, 0.26);
}

.faq-flow__media {
  position: relative;
  border: 1px solid var(--faq-line);
}

.faq-flow__media::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 24px;
  height: 24px;
  border-top: 2px solid var(--faq-green);
  border-right: 2px solid var(--faq-green);
}

.faq-flow__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 7 / 4;
}

.faq-flow__content {
  padding: 4px 8px;
}

.faq-flow__content .index-label {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--faq-purple);
}

.faq-flow__content h2 {
  font-size: 24px;
  font-weight: 700;
  color: #EAEEF5;
  margin-bottom: 16px;
}

.faq-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: faqFlow;
}

.faq-flow__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 15px;
  color: #B4C0D0;
}

.faq-flow__list li:last-child {
  border-bottom: none;
}

.faq-flow__list .mono {
  font-size: 13px;
  font-weight: 700;
  color: var(--faq-green);
  min-width: 28px;
}

/* ========== 底部联系带 ========== */
.faq-contact-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 48px 0 56px;
  margin-top: 16px;
  border-top: 1px solid var(--faq-green);
  border-bottom: 1px solid var(--faq-line);
  background: linear-gradient(135deg, rgba(21, 61, 58, 0.4) 0%, rgba(19, 26, 42, 0.6) 60%, rgba(30, 42, 74, 0.28) 100%);
}

.faq-contact-band__text {
  padding: 0 4px;
}

.faq-contact-band__text .index-label {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--faq-green);
}

.faq-contact-band__text h2 {
  font-size: 28px;
  font-weight: 700;
  color: #EAEEF5;
}

.faq-contact-band__text p {
  margin-top: 12px;
  font-size: 15px;
  color: #B4C0D0;
  max-width: 560px;
}

.faq-contact-band__text .btn {
  margin-top: 20px;
}

.faq-contact-band__meta {
  padding: 8px 4px;
}

.faq-contact-band__meta .info-note {
  margin: 0;
}

.faq-contact-band__hours {
  margin-top: 14px;
  font-size: 13px;
  color: #B4C0D0;
}

/* ========== 平板 ≥640px ========== */
@media (min-width: 640px) {
  .faq-index-layout {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: start;
  }

  .faq-flow {
    grid-template-columns: 5fr 7fr;
    gap: 32px;
    align-items: center;
  }

  .faq-contact-band {
    grid-template-columns: 7fr 5fr;
    gap: 32px;
    align-items: center;
  }

  .faq-cat {
    padding-left: 28px;
    padding-right: 28px;
  }
}

/* ========== 桌面 ≥1080px ========== */
@media (min-width: 1080px) {
  .faq-hero-blueprint {
    padding-top: calc(var(--header-h) + 72px);
    padding-bottom: 88px;
  }

  .faq-hero-frame {
    padding: 44px 48px;
  }

  .faq-hero-frame__body {
    display: grid;
    grid-template-columns: 7fr 4fr;
    gap: 48px;
    margin-top: 32px;
  }

  .faq-hero-frame__meta {
    margin-top: 0;
    border-top: none;
    border-left: 1px solid var(--faq-line);
    padding-top: 0;
    padding-left: 32px;
  }

  .faq-hero-stats__row {
    padding: 14px 0;
  }

  .faq-index-zone {
    padding: 64px 0;
  }

  .faq-index-layout {
    grid-template-columns: 5fr 4fr;
    gap: 48px;
    align-items: center;
  }

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

  .faq-cat {
    padding-left: 48px;
    padding-right: 48px;
    padding-top: 56px;
    padding-bottom: 16px;
  }

  .faq-cat--teal,
  .faq-cat--dark,
  .faq-cat--wine {
    margin-left: -48px;
    margin-right: -48px;
    padding-left: 48px;
    padding-right: 48px;
  }

  .faq-cat__head {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 18px;
    align-items: end;
    margin-bottom: 12px;
  }

  .faq-cat__head .index-label {
    margin-bottom: 0;
  }

  .faq-cat__head p {
    margin-top: 4px;
  }

  .faq-item summary {
    padding: 22px 12px 22px 16px;
  }

  .faq-item summary h3 {
    font-size: 17px;
  }

  .faq-flow {
    padding: 72px 0;
    margin: 24px 0;
  }

  .faq-flow__list li {
    font-size: 16px;
  }

  .faq-contact-band {
    padding: 64px 0 72px;
  }

  .faq-contact-band__text h2 {
    font-size: 32px;
  }
}

/* ========== 减少动态偏好 ========== */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
  }

  .faq-item__icon,
  .faq-item[open] .faq-item__icon {
    transform: none !important;
  }
}

.page-faq {
  --faq-cat-accent: currentColor;
  --faq-cat-index: var(--faq-line);
  --faq-cat-line: currentColor;
}