.page-faq {
  background-color: var(--ink);
  color: var(--paper);
}

.page-faq .shell {
  width: 100%;
}

/* ---------- 首屏 ---------- */
.page-faq .help-hero {
  position: relative;
  padding: clamp(24px, 4vw, 40px) 0 clamp(36px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
  background-image:
    repeating-linear-gradient(0deg, transparent 0 63px, var(--line-soft) 63px 64px),
    repeating-linear-gradient(90deg, transparent 0 63px, var(--line-soft) 63px 64px),
    linear-gradient(160deg, var(--ink) 0%, var(--ink-soft) 62%, var(--ink) 100%);
  overflow: hidden;
}

.page-faq .help-hero::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -80px;
  width: 260px;
  height: 340px;
  background: linear-gradient(180deg, rgba(15, 163, 107, 0.55), rgba(255, 106, 26, 0.28));
  transform: skewX(-18deg);
  pointer-events: none;
  opacity: 0.7;
}

.page-faq .help-hero .breadcrumb {
  position: relative;
  z-index: 1;
  margin: 0 0 clamp(20px, 3vw, 34px);
  color: var(--mist);
  font-size: 12.5px;
}

.page-faq .help-hero .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .help-hero .breadcrumb a:hover,
.page-faq .help-hero .breadcrumb a:focus-visible {
  color: var(--signal);
}

.page-faq .help-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
}

.page-faq .help-hero__intro {
  max-width: 40em;
}

.page-faq .help-hero h1 {
  margin: 12px 0 18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.1rem, 6.4vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
}

.page-faq .help-hero h1 em {
  font-style: normal;
  color: var(--signal);
}

.page-faq .help-hero__lede {
  margin: 0 0 26px;
  max-width: 34em;
  font-size: 16.5px;
  line-height: 1.8;
  color: rgba(244, 247, 249, 0.82);
}

.page-faq .help-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .help-hero__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background-color: var(--line);
  border: 1px solid var(--line);
  align-self: end;
}

.page-faq .help-stat {
  background-color: var(--ink);
  padding: 18px 14px;
}

.page-faq .help-stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3.4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--pitch);
}

.page-faq .help-stat__label {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 通用小节标题 ---------- */
.page-faq .faq-head {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-faq .faq-head h2 {
  margin: 10px 0 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.6vw, 2.2rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.page-faq .faq-head__lede {
  margin: 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 三步上手 ---------- */
.page-faq .faq-steps {
  padding: clamp(40px, 7vw, 84px) 0 clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-steps__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 32px);
}

.page-faq .faq-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background-color: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-step {
  background-color: var(--ink);
  padding: clamp(20px, 3vw, 26px) clamp(16px, 2.4vw, 22px);
  border-left: 2px solid transparent;
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-faq .faq-step:hover {
  border-left-color: var(--signal);
  background-color: var(--ink-soft);
}

.page-faq .faq-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.1rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--signal);
}

.page-faq .faq-step__title {
  margin: 14px 0 8px;
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(244, 247, 249, 0.75);
}

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

/* ---------- 两栏主体 ---------- */
.page-faq .faq-body {
  padding: clamp(36px, 6vw, 72px) 0 clamp(40px, 7vw, 88px);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 40px);
}

.page-faq .faq-index {
  align-self: start;
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 12px;
  border: 1px solid var(--line);
  background-color: rgba(16, 26, 44, 0.55);
  color: var(--mist);
  font-size: 13.5px;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-faq .faq-index__link .mono {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--signal);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  border-color: var(--signal);
  background-color: var(--ink-soft);
}

.page-faq .faq-index__link.is-active {
  color: var(--signal);
  border-color: var(--signal);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(38px, 5vw, 64px);
  scroll-margin-top: 140px;
}

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

.page-faq .faq-group__head {
  border-top: 2px solid var(--signal);
  padding-top: 14px;
  margin-bottom: 20px;
}

.page-faq .faq-group__head h2 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.35rem, 3vw, 1.7rem);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.page-faq .faq-group__lede {
  margin: 0;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-rules__figure {
  margin: 0 0 22px;
}

/* ---------- 手风琴问答 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--line);
  border-left: 3px solid transparent;
  background-color: rgba(16, 26, 44, 0.55);
  margin-bottom: 10px;
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-faq .faq-item:hover {
  border-left-color: var(--signal);
}

.page-faq .faq-item[open] {
  border-left-color: var(--pitch);
  background-color: var(--ink-soft);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  transition: background-color 0.22s var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--signal);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "–";
  color: var(--pitch);
}

.page-faq .faq-item__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--signal);
  padding-top: 3px;
}

.page-faq .faq-item__title {
  flex: 1;
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 800;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-item__a {
  margin: 0 16px 18px;
  padding: 4px 0 4px 14px;
  border-left: 2px solid var(--pitch);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 247, 249, 0.8);
}

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

.page-faq .faq-item__a strong {
  color: var(--paper);
  font-weight: 700;
}

.page-faq .faq-item__a a {
  color: var(--signal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--paper);
}

/* ---------- 收口 ---------- */
.page-faq .faq-more {
  padding: 0 0 clamp(48px, 8vw, 96px);
  scroll-margin-top: 140px;
}

.page-faq .faq-more__box {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 40px);
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--line);
  border-top: 2px solid var(--signal);
  background-image: linear-gradient(150deg, var(--ink-soft) 0%, var(--ink) 70%);
}

.page-faq .faq-more__main h2 {
  margin: 10px 0 14px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.page-faq .faq-more__main p {
  margin: 0 0 24px;
  max-width: 32em;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(244, 247, 249, 0.8);
}

.page-faq .faq-more__label {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .faq-more__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-more__list li {
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.6;
  color: rgba(244, 247, 249, 0.85);
}

.page-faq .faq-more__list li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 10px;
  background-color: var(--pitch);
  vertical-align: middle;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-steps__list {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1040px) {
  .page-faq .help-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-faq .faq-steps__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-faq .faq-body__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 132px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 6px;
  }

  .page-faq .faq-index__link {
    width: 100%;
    justify-content: flex-start;
    border-left-width: 2px;
    border-left-color: var(--line);
  }

  .page-faq .faq-more__box {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}