/* ===== 答疑中心 页面专属样式（作用域：.page-faq） ===== */

.page-faq {
  --faq-line: rgba(85, 97, 122, .24);
  --faq-soft: rgba(47, 224, 176, .14);
  display: block;
  background: var(--c-cream);
  color: var(--c-ink);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  color: var(--c-cream);
  border-bottom: 3px solid var(--c-aurora);
  background:
    radial-gradient(120% 92% at 10% -6%, rgba(47, 224, 176, .18) 0%, rgba(47, 224, 176, 0) 58%),
    radial-gradient(90% 80% at 96% 8%, rgba(242, 180, 65, .12) 0%, rgba(242, 180, 65, 0) 52%),
    linear-gradient(152deg, var(--c-space) 0%, var(--c-night) 62%, #1b2b4d 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(169, 242, 220, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(169, 242, 220, .05) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 84%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 84%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(26px, 5vw, 46px) var(--gutter) clamp(34px, 6vw, 58px);
}

.page-faq .faq-hero .breadcrumb-list {
  margin: 0 0 22px;
  font-size: 13px;
  color: rgba(245, 240, 230, .62);
}

.page-faq .faq-hero .breadcrumb-list a {
  color: var(--c-aurora-soft);
  text-decoration: none;
}

.page-faq .faq-hero .breadcrumb-list a:hover {
  text-decoration: underline;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 14px;
  color: var(--c-aurora);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
}

.page-faq .faq-h1 {
  max-width: 17em;
  margin: 0 0 16px;
  font-size: clamp(30px, 7.4vw, 60px);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-faq .faq-lede {
  max-width: 46em;
  margin: 0 0 clamp(26px, 4vw, 40px);
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.8;
  color: rgba(245, 240, 230, .82);
}

/* ---------- 三条速答 ---------- */

.page-faq .faq-quick {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .faq-quick__item {
  position: relative;
  padding: 18px 20px 20px;
  background: linear-gradient(150deg, rgba(21, 35, 63, .94), rgba(11, 27, 51, .55));
  border: 1px solid rgba(169, 242, 220, .2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-faq .faq-quick__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 3px;
  background: var(--c-aurora);
}

.page-faq .faq-quick__item:nth-child(2)::before {
  background: var(--c-gold);
}

.page-faq .faq-quick__item:nth-child(3)::before {
  background: var(--c-ember);
}

.page-faq .faq-quick__k {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: rgba(245, 240, 230, .58);
}

.page-faq .faq-quick__v {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: clamp(28px, 6.4vw, 42px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--c-aurora-soft);
}

.page-faq .faq-quick__item:nth-child(2) .faq-quick__v {
  color: var(--c-gold);
}

.page-faq .faq-quick__item:nth-child(3) .faq-quick__v {
  color: var(--c-paper);
  font-size: clamp(23px, 5vw, 33px);
}

.page-faq .faq-quick__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 240, 230, .72);
}

/* ---------- 主体布局 ---------- */

.page-faq .faq-layout {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(34px, 6vw, 68px) var(--gutter) clamp(52px, 9vw, 108px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 54px);
  align-items: start;
}

/* ---------- 分组索引 ---------- */

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

.page-faq .faq-index__head {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--faq-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--c-slate);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index__item {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 10px 14px 10px 12px;
  font-size: 16px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  color: var(--c-slate);
  background: rgba(255, 251, 243, .7);
  border-left: 3px solid transparent;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--c-space);
  background: var(--faq-soft);
  border-left-color: var(--c-aurora);
  outline: none;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-ember);
}

/* ---------- 右侧主体 ---------- */

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

.page-faq .faq-main > * + * {
  margin-top: clamp(38px, 6vw, 70px);
}

.page-faq .faq-group,
.page-faq .faq-contact {
  scroll-margin-top: calc(var(--status-h) + 20px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: 4px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--c-ink);
}

.page-faq .faq-group__num {
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--c-ember);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(21px, 4.2vw, 32px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--c-space);
}

.page-faq .faq-group__lede {
  max-width: 36em;
  margin: 12px 0 18px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-slate);
}

/* ---------- 折页式问答 ---------- */

.page-faq .faq-items {
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
  border-left: 3px solid transparent;
  background: transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  background: var(--c-paper);
  border-left-color: var(--c-aurora);
  box-shadow: 0 12px 30px rgba(11, 27, 51, .07);
}

.page-faq .faq-q {
  position: relative;
  padding: 17px 46px 17px 16px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--c-space);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 18px;
  width: 13px;
  height: 13px;
  margin-top: -6.5px;
  background:
    linear-gradient(var(--c-ember), var(--c-ember)) 50% 50% / 13px 2px no-repeat,
    linear-gradient(var(--c-ember), var(--c-ember)) 50% 50% / 2px 13px no-repeat;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-q::after {
  background: linear-gradient(var(--c-aurora), var(--c-aurora)) 50% 50% / 13px 2px no-repeat;
}

.page-faq .faq-q:hover {
  color: var(--c-night);
}

.page-faq .faq-a {
  padding: 0 46px 20px 16px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-ink);
}

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

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

.page-faq .faq-a strong {
  font-weight: 700;
  color: var(--c-space);
}

.page-faq .faq-a a {
  color: #0a7a5c;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-a a:hover {
  color: var(--c-space);
}

/* ---------- 图组 ---------- */

.page-faq .faq-figure {
  margin: 0;
}

.page-faq .faq-figure--inline {
  margin-top: clamp(22px, 3.5vw, 34px);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--faq-line);
  background: linear-gradient(135deg, rgba(47, 224, 176, .12), rgba(11, 27, 51, .12));
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: #3f4a60;
}

/* ---------- 联系面板 ---------- */

.page-faq .faq-contact {
  position: relative;
  padding: clamp(24px, 4.4vw, 42px);
  color: var(--c-cream);
  background:
    radial-gradient(110% 90% at 100% 0%, rgba(47, 224, 176, .16) 0%, rgba(47, 224, 176, 0) 58%),
    linear-gradient(152deg, var(--c-space), var(--c-night) 68%, #1c2c4e);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-contact__head {
  border-bottom-color: rgba(169, 242, 220, .35);
}

.page-faq .faq-contact__num {
  color: var(--c-gold);
}

.page-faq .faq-contact__title {
  color: var(--c-paper);
}

.page-faq .faq-contact__lede {
  max-width: 40em;
  margin: 16px 0 24px;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(245, 240, 230, .76);
}

.page-faq .faq-contact__rows {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-bottom: 26px;
}

.page-faq .faq-contact__row {
  padding: 14px 16px;
  background: rgba(169, 242, 220, .07);
  border-left: 3px solid rgba(47, 224, 176, .55);
}

.page-faq .faq-contact__k {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-aurora);
}

.page-faq .faq-contact__v {
  display: block;
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-paper);
  word-break: break-word;
}

.page-faq .faq-contact__v--mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

.page-faq .faq-contact__note {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(245, 240, 230, .58);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.page-faq .faq-contact__tail {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(245, 240, 230, .6);
}

/* ---------- 平板及以上 ---------- */

@media (min-width: 760px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-contact__rows {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-q {
    padding: 19px 52px 19px 20px;
    font-size: 17px;
  }

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

/* ---------- 桌面端：左侧跟随索引 ---------- */

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 252px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 64px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--status-h) + 22px);
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__item {
    display: block;
  }

  .page-faq .faq-index__item + .faq-index__item {
    margin-top: 2px;
  }

  .page-faq .faq-index__link {
    white-space: normal;
    padding: 11px 14px 11px 12px;
  }
}

/* ---------- 减少动态偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-q::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}