.page-faq {
  background: var(--c-silver);
  color: var(--c-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

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

.page-faq h2 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.page-faq .section-kicker {
  color: var(--c-primary);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

/* ===== 英雄区 ===== */
.page-faq__hero {
  position: relative;
  overflow: hidden;
  background: var(--c-dark);
  color: var(--c-white);
  padding: calc(var(--header-h) + 2rem) 0 4rem;
}

.page-faq__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 68%, rgba(255, 107, 0, 0.25) 68% 72%, transparent 72% 80%, rgba(57, 255, 20, 0.12) 80% 84%, transparent 84%);
  pointer-events: none;
}

.page-faq__hero::after {
  content: "FAQ";
  position: absolute;
  top: 8%;
  right: -2rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(8rem, 26vw, 20rem);
  line-height: 1;
  letter-spacing: -0.05em;
  color: rgba(255, 255, 255, 0.045);
  pointer-events: none;
  user-select: none;
}

.page-faq__hero-inner {
  position: relative;
  z-index: 1;
}

.page-faq__hero .breadcrumbs {
  margin-bottom: 2.5rem;
}

.page-faq__hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.2rem, 5.5vw, 4.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  max-width: 18em;
  margin: 0.6rem 0 1.4rem;
}

.page-faq__hero-lead {
  font-size: 1.05rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.75);
  max-width: 46rem;
}

.page-faq__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.page-faq__hero .btn--outline {
  border-color: rgba(255, 255, 255, 0.55);
  color: var(--c-white);
}

.page-faq__hero .btn--outline:hover {
  border-color: var(--c-primary);
  background: var(--c-primary);
  color: #fff;
}

.page-faq__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 2.5rem;
  padding-top: 1.8rem;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.page-faq__quick a {
  display: inline-block;
  color: var(--c-white);
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 0.5rem 1rem;
  font-size: 0.88rem;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq__quick a:hover,
.page-faq__quick a:focus {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
}

/* ===== 章节数字 ===== */
.page-faq__chapter-num {
  margin: 0 0 0.6rem;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(3.5rem, 7vw, 5.5rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--c-primary);
}

.page-faq__chapter-num--light {
  -webkit-text-stroke: 1.5px rgba(255, 255, 255, 0.45);
}

/* ===== 热门问题 ===== */
.page-faq__hot {
  background: var(--c-silver);
  padding: var(--space-5) 0;
}

.page-faq__hot-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.5rem;
}

.page-faq__hot-aside h2 {
  font-size: clamp(1.75rem, 3vw, 2.6rem);
  margin: 0.4rem 0 0.8rem;
}

.page-faq__hot-desc {
  color: var(--c-muted);
  line-height: 1.8;
  margin-bottom: 1.2rem;
}

.page-faq__hot-figure {
  margin: 1.5rem 0 1.2rem;
}

.page-faq__hot-figure img {
  width: 100%;
  max-width: 24rem;
  height: auto;
  object-fit: cover;
}

.page-faq__hot-more {
  color: var(--c-primary);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq__hot-more:hover {
  border-bottom-color: var(--c-primary);
}

/* ===== 手风琴 ===== */
.page-faq__qa {
  background: var(--c-white);
  border: 1px solid rgba(10, 25, 47, 0.1);
  border-left: 4px solid var(--c-primary);
  margin-bottom: 1rem;
  transition: box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq__qa[open] {
  border-color: rgba(255, 107, 0, 0.35);
  box-shadow: 0 12px 30px rgba(10, 25, 47, 0.08);
}

.page-faq__qa summary {
  display: flex;
  align-items: center;
  gap: 1rem;
  list-style: none;
  cursor: pointer;
  padding: 1.2rem 1.4rem;
  user-select: none;
}

.page-faq__qa summary::-webkit-details-marker {
  display: none;
}

.page-faq__qa summary:hover {
  background: rgba(255, 107, 0, 0.05);
}

.page-faq__qa-svg {
  flex: 0 0 auto;
  width: 1.6rem;
  height: 1.6rem;
  color: var(--c-primary);
}

.page-faq__qa-question {
  flex: 1;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.5;
}

.page-faq__qa-arrow {
  flex: 0 0 auto;
  position: relative;
  width: 1.4rem;
  height: 1.4rem;
}

.page-faq__qa-arrow::before,
.page-faq__qa-arrow::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 2px;
  background: var(--c-primary);
  transform: translate(-50%, -50%);
  transition: transform 0.3s var(--ease);
}

.page-faq__qa-arrow::before {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq__qa-arrow::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq__qa[open] .page-faq__qa-arrow::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq__qa-body {
  padding: 0 1.4rem 1.4rem;
  color: rgba(26, 29, 33, 0.78);
  line-height: 1.85;
}

.page-faq__qa-body p {
  margin: 0.6rem 0;
}

.page-faq__qa-body a {
  color: var(--c-primary);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 0, 0.4);
}

.page-faq__qa-body a:hover {
  border-bottom-color: var(--c-primary);
}

/* ===== 速度线分隔 ===== */
.page-faq__streak {
  height: 5rem;
  background:
    linear-gradient(115deg, transparent 46%, var(--c-primary) 46% 54%, transparent 54%),
    linear-gradient(115deg, transparent 58%, var(--c-dark-2) 58% 66%, transparent 66%),
    var(--c-dark);
}

/* ===== 版本切换指南 ===== */
.page-faq__guide {
  background: var(--c-dark);
  color: var(--c-white);
  padding: var(--space-5) 0;
}

.page-faq__guide .section-kicker {
  color: var(--c-primary-soft);
}

.page-faq__guide-head {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-faq__guide-head h2 {
  font-size: clamp(1.75rem, 3.2vw, 2.8rem);
  margin: 0;
}

.page-faq__guide-lead {
  color: rgba(255, 255, 255, 0.72);
  font-size: 1.05rem;
  line-height: 1.85;
  max-width: 50rem;
  margin: 1rem 0 0;
}

.page-faq__guide-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.5rem;
  margin-top: 3rem;
}

.page-faq__steps {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-faq__step {
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
  padding: 1.4rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.page-faq__step-num {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 2rem;
  line-height: 1.2;
  color: var(--c-primary);
  min-width: 2.2rem;
}

.page-faq__step-content h3 {
  font-size: 1.1rem;
  margin: 0.2rem 0 0.3rem;
  color: var(--c-white);
}

.page-faq__step-content p {
  margin: 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-faq__version-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.page-faq__version-card {
  background: var(--c-dark-2);
  border-left: 4px solid var(--c-primary);
  padding: 1.5rem;
}

.page-faq__version-card h3 {
  font-size: 1.1rem;
  margin: 0.75rem 0 0.35rem;
}

.page-faq__version-card p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
}

.page-faq__guide-figure {
  margin: 0;
  align-self: start;
}

.page-faq__guide-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq__guide-figure figcaption {
  margin-top: 1rem;
  padding-left: 0.9rem;
  border-left: 3px solid var(--c-primary-soft);
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.9rem;
}

/* ===== 数据更新机制 ===== */
.page-faq__data {
  background: var(--c-ink);
  color: var(--c-white);
  padding: var(--space-5) 0;
  position: relative;
  overflow: hidden;
}

.page-faq__data::after {
  content: "DATA";
  position: absolute;
  right: -1.5rem;
  bottom: -2rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(6rem, 18vw, 14rem);
  line-height: 1;
  color: rgba(255, 255, 255, 0.03);
  pointer-events: none;
  user-select: none;
}

.page-faq__data .section-kicker {
  color: var(--c-electric);
}

.page-faq__data-head {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-faq__data-head h2 {
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  margin: 0.5rem 0 0;
}

.page-faq__data .live-dot {
  margin-top: 1rem;
  background: rgba(57, 255, 20, 0.14);
  color: var(--c-electric);
  border: 1px solid rgba(57, 255, 20, 0.4);
  padding: 0.35rem 0.85rem;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-faq__data-lead {
  color: rgba(255, 255, 255, 0.72);
  font-size: 1.05rem;
  line-height: 1.85;
  max-width: 50rem;
  margin: 1.2rem 0 0;
}

.page-faq__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 2.5rem 0 2rem;
  position: relative;
  z-index: 1;
}

.page-faq__stat {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.6rem 1.4rem;
}

.page-faq__stat-num {
  display: block;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  line-height: 1;
  color: var(--c-electric);
}

.page-faq__stat-label {
  display: block;
  margin-top: 0.6rem;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

.page-faq__sync {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 1.6rem;
  margin-bottom: 2.5rem;
  position: relative;
  z-index: 1;
}

.page-faq__sync h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.page-faq__sync p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.8;
  font-size: 0.98rem;
}

.page-faq__timeline-wrap {
  position: relative;
  z-index: 1;
}

.page-faq__timeline-wrap h3 {
  font-size: 1.1rem;
  margin: 0 0 1.5rem;
}

.page-faq__timeline {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-faq__timeline li {
  position: relative;
  padding: 0 0 1.6rem 1.8rem;
}

.page-faq__timeline li::before {
  content: "";
  position: absolute;
  top: 0.35rem;
  left: 0;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--c-primary);
}

.page-faq__timeline-year {
  display: block;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 1.55rem;
  color: var(--c-electric);
}

.page-faq__timeline p {
  margin: 0.3rem 0 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ===== 联系客服 ===== */
.page-faq__contact {
  background: linear-gradient(180deg, #FFFFFF 0%, var(--c-soft) 100%);
  padding: var(--space-5) 0;
  text-align: center;
}

.page-faq__contact .section-kicker {
  text-align: center;
}

.page-faq__contact h2 {
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  margin: 0.5rem 0 0.8rem;
}

.page-faq__contact-lead {
  color: var(--c-muted);
  max-width: 40rem;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.page-faq__contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.page-faq__contact-card {
  background: var(--c-white);
  border-top: 4px solid var(--c-primary);
  padding: 2rem 1.5rem;
  box-shadow: 0 12px 32px rgba(10, 25, 47, 0.07);
}

.page-faq__contact-card svg {
  width: 2.4rem;
  height: 2.4rem;
  color: var(--c-primary);
  margin: 0 auto 1rem;
  display: block;
}

.page-faq__contact-card h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-muted);
}

.page-faq__contact-value {
  margin: 0.6rem 0 0.3rem;
  font-weight: 800;
  font-size: 1.15rem;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-faq__contact-scope {
  font-size: 0.85rem;
  color: var(--c-muted);
}

.page-faq__contact-address {
  color: var(--c-muted);
  font-size: 0.95rem;
  margin: 0 0 2rem;
}

.page-faq__contact .btn {
  display: inline-flex;
  align-items: center;
}

/* ===== 桌面端 ===== */
@media (min-width: 48rem) {
  .page-faq__version-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq__contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 56rem) {
  .page-faq__timeline {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1.5rem;
    position: relative;
  }

  .page-faq__timeline::before {
    content: "";
    position: absolute;
    top: 0.475rem;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--c-primary) 20%, var(--c-electric) 90%);
  }

  .page-faq__timeline li {
    padding: 1.5rem 0 0;
  }

  .page-faq__timeline li::before {
    top: 0.145rem;
    left: 0;
    width: 0.85rem;
    height: 0.85rem;
  }
}

@media (min-width: 60rem) {
  .page-faq__hot-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 4rem;
  }

  .page-faq__hot-aside {
    position: sticky;
    top: 7rem;
    align-self: start;
  }

  .page-faq__guide-head {
    flex-direction: row;
    align-items: flex-end;
    gap: 2rem;
  }

  .page-faq__guide-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3.5rem;
  }
}