.page-faq {
  --faq-brd: #D9DCE5;
  --faq-brd-soft: #E8E8F0;
  --faq-code-bg: #F4F5FA;
  --faq-orange-soft: rgba(255, 107, 53, 0.08);
  position: relative;
  background: var(--paper);
}

/* ===== Hero ===== */
.page-faq__hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(2px 2px at 18% 32%, rgba(255,255,255,.65), transparent 100%),
    radial-gradient(1px 1px at 62% 24%, rgba(255,255,255,.5), transparent 100%),
    radial-gradient(2px 2px at 84% 68%, rgba(255,255,255,.4), transparent 100%),
    radial-gradient(1px 1px at 40% 78%, rgba(255,255,255,.35), transparent 100%),
    linear-gradient(125deg, var(--space) 0%, var(--space-deep) 72%);
  color: #fff;
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  border-bottom: 3px solid var(--orange);
}
.page-faq__hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--orange) 0 8%, var(--silver) 8% 24%, transparent 24% 100%);
  pointer-events: none;
}
.page-faq__hero-grid {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  position: relative;
  z-index: 2;
}
.page-faq__hero-main .breadcrumb a {
  color: rgba(255,255,255,.72);
  text-decoration: none;
  font-size: .86rem;
}
.page-faq__hero-main .breadcrumb a:hover {
  color: var(--orange-bright);
}
.page-faq__crumb-sep {
  color: rgba(255,255,255,.4);
  margin: 0 .45rem;
  font-family: var(--font-mono);
}
.page-faq__kicker {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--orange-bright);
  text-transform: uppercase;
  margin-top: 1.1rem;
}
.page-faq__title {
  font-size: clamp(1.8rem, 4.4vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: .5rem 0 1rem;
  max-width: 13em;
}
.page-faq__lead {
  font-size: 1.02rem;
  line-height: 1.75;
  color: rgba(255,255,255,.72);
  max-width: 38em;
  margin-top: 0;
}
.page-faq__hero-meta {
  margin: 0;
  font-family: var(--font-mono);
  border: 1px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.06);
  backdrop-filter: blur(10px);
  padding: 0 1rem;
}
.page-faq__hero-meta-item {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding: .8rem 0;
  border-bottom: 1px dashed rgba(255,255,255,.18);
}
.page-faq__hero-meta-item:last-child {
  border-bottom: 0;
}
.page-faq__hero-meta dt {
  color: rgba(255,255,255,.52);
  font-size: .72rem;
  letter-spacing: .08em;
}
.page-faq__hero-meta dd {
  margin: 0;
  color: #fff;
  font-size: .8rem;
}

/* ===== 本页目录 ===== */
.page-faq__toc {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem 1.6rem;
  padding-top: 1.4rem;
  padding-bottom: .6rem;
  font-family: var(--font-mono);
  font-size: .82rem;
}
.page-faq__toc a {
  color: var(--muted-strong);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: .2rem;
  transition: color .2s ease, border-color .2s ease;
}
.page-faq__toc a:hover {
  color: var(--orange-deep);
  border-color: var(--orange);
}

/* ===== 收费索引 ===== */
.page-faq__billing {
  padding-top: clamp(3rem, 7vw, 5rem);
}
.page-faq__section-head {
  margin-bottom: clamp(1.8rem, 4vw, 2.75rem);
}
.page-faq__billing-visual {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--faq-brd);
  margin-bottom: 2rem;
}
.page-faq__billing-banner {
  display: block;
  width: 100%;
  height: auto;
}
.page-faq__table-scroll {
  overflow-x: auto;
}
.page-faq__billing-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .95rem;
  min-width: 560px;
}
.page-faq__billing-table th {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--muted);
  text-align: left;
  padding: .75rem 1rem;
  background: var(--mist);
  border-bottom: 2px solid var(--ink);
}
.page-faq__billing-table td {
  padding: 1.1rem 1rem;
  border-bottom: 1px solid var(--faq-brd);
  vertical-align: top;
}
.page-faq__billing-table tbody tr:last-child td {
  border-bottom: 0;
}
.page-faq__period {
  font-family: var(--font-mono);
  font-weight: 600;
}
.page-faq__price {
  color: var(--ink);
  font-weight: 700;
}
.page-faq__row-current {
  background: linear-gradient(90deg, var(--faq-orange-soft), transparent 70%);
  box-shadow: inset 4px 0 0 var(--orange);
}
.page-faq__billing-note {
  margin: 1.25rem 0 0;
  font-size: .9rem;
  color: var(--muted-strong);
  line-height: 1.7;
}
.page-faq__billing-note a,
.page-faq__tech-intro a {
  color: var(--orange-deep);
  text-underline-offset: 3px;
}

/* ===== FAQ 折叠面板 ===== */
.page-faq__members {
  padding-top: clamp(3rem, 7vw, 5rem);
}
.page-faq__tip {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--muted);
  margin: -1rem 0 1.25rem;
  padding: .6rem .9rem;
  background: var(--faq-code-bg);
  border: 1px solid var(--faq-brd-soft);
  border-radius: 6px;
}
.page-faq__faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
.page-faq__faq-list {
  display: grid;
  gap: .85rem;
}
.page-faq__details {
  background: var(--paper);
  border: 1px solid var(--faq-brd);
  border-radius: 10px;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.page-faq__details[open] {
  border-color: var(--orange);
  box-shadow: var(--shadow);
}
.page-faq__summary {
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: .8rem;
  padding: 1.15rem 1.1rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.55;
}
.page-faq__summary::-webkit-details-marker {
  display: none;
}
.page-faq__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--orange);
  font-size: 1.2rem;
  line-height: 1;
  transition: transform .25s ease;
  flex-shrink: 0;
}
.page-faq__details[open] > .page-faq__summary::after {
  transform: rotate(45deg);
}
.page-faq__qnum {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--orange);
  border: 1px solid var(--faq-brd);
  background: var(--paper);
  padding: .2rem .45rem;
  border-radius: 4px;
  flex-shrink: 0;
}
.page-faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s cubic-bezier(.22,.61,.36,1);
}
.page-faq__details[open] .page-faq__answer {
  max-height: 320px;
}
.page-faq__answer p {
  margin: 0;
  padding: 0 1.1rem 1.25rem calc(1.1rem + 2.7rem);
  font-size: .94rem;
  line-height: 1.75;
  color: var(--muted-strong);
}

/* ===== 相关跳转 ===== */
.page-faq__related {
  padding: 1.5rem;
  border: 1px solid var(--faq-brd);
  border-radius: 12px;
  background: var(--paper);
}
.page-faq__related h3 {
  font-size: .95rem;
  margin: 0 0 1rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--faq-brd-soft);
  letter-spacing: .02em;
}
.page-faq__related-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .6rem;
}
.page-faq__related-list a {
  color: var(--ink);
  text-decoration: none;
  font-size: .92rem;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  transition: color .2s ease;
}
.page-faq__related-list a::before {
  content: "→";
  font-family: var(--font-mono);
  color: var(--orange);
  flex-shrink: 0;
}
.page-faq__related-list a:hover {
  color: var(--orange-deep);
}

/* ===== 技术 FAQ ===== */
.page-faq__tech {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--faq-brd);
  border-bottom: 1px solid var(--faq-brd);
  background:
    radial-gradient(1px 1px at 10% 20%, var(--silver), transparent 100%),
    radial-gradient(1px 1px at 80% 60%, var(--silver), transparent 100%),
    linear-gradient(rgba(232,232,240,.65), rgba(232,232,240,.65));
}
.page-faq__tech .page-faq__details {
  background: rgba(255,255,255,.75);
}
.page-faq__tech-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: .5rem 1rem;
  margin-bottom: .75rem;
}
.page-faq__tech-note {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--muted);
  margin: 0;
}
.page-faq__tech-intro {
  max-width: 46em;
  color: var(--muted-strong);
  line-height: 1.7;
  font-size: .95rem;
  margin: 0 0 1.5rem;
}
.page-faq__tech-note--end {
  margin-top: 1.5rem;
  border-top: 1px solid var(--faq-brd);
  padding-top: 1rem;
}
.page-faq__orbit {
  position: absolute;
  top: 2rem;
  right: 1rem;
  width: 220px;
  height: 220px;
  opacity: .65;
  display: none;
  pointer-events: none;
}

/* ===== 联系支持 ===== */
.page-faq__contact {
  background:
    radial-gradient(2px 2px at 26% 40%, rgba(255,255,255,.35), transparent 100%),
    radial-gradient(1px 1px at 78% 70%, rgba(255,255,255,.28), transparent 100%),
    linear-gradient(135deg, var(--space) 0%, var(--space-deep) 100%);
  color: #fff;
}
.page-faq__contact .section-kicker {
  color: var(--orange-bright);
}
.page-faq__contact h2 {
  color: #fff;
}
.page-faq__contact .lead {
  color: rgba(255,255,255,.72);
}
.page-faq__contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
}
.page-faq__contact-list {
  margin: 1.75rem 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .9rem;
  font-family: var(--font-mono);
}
.page-faq__contact-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 1rem;
  border-bottom: 1px dashed rgba(255,255,255,.18);
  padding-bottom: .9rem;
  font-size: .86rem;
}
.page-faq__contact-label {
  color: rgba(255,255,255,.5);
}
.page-faq__contact-value {
  color: #fff;
  word-break: break-word;
  margin: 0;
}
.page-faq__contact-side {
  display: flex;
  justify-content: center;
}
.page-faq__contact-img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.2);
}

/* ===== 桌面增强 ===== */
@media (min-width: 760px) {
  .page-faq__hero-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }
  .page-faq__hero-meta {
    margin-top: 1.5rem;
  }
}

@media (min-width: 900px) {
  .page-faq__contact-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
    align-items: center;
    gap: clamp(2rem, 6vw, 4.5rem);
  }
  .page-faq__contact-side {
    justify-content: flex-end;
  }
}

@media (min-width: 980px) {
  .page-faq__faq-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }
}

@media (min-width: 1280px) {
  .page-faq__orbit {
    display: block;
  }
}