.page-faq {
  --faq-rail: 264px;
  --faq-cyan-ink: #0E7D6C;
  --faq-text: #2C4457;
  --faq-muted: #5C7085;
  background: var(--cedar);
  color: var(--faq-text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 1.1rem var(--pad-x) 0;
  display: flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--faq-muted);
}
.page-faq .faq-crumbs a {
  color: var(--faq-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.page-faq .faq-crumbs a:hover,
.page-faq .faq-crumbs a:focus-visible {
  color: var(--faq-cyan-ink);
  border-bottom-color: currentColor;
}
.page-faq .faq-crumbs .sep { opacity: .55; }
.page-faq .faq-crumbs [aria-current="page"] { color: var(--deep); }

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: 1rem;
  padding: clamp(2.2rem, 6vw, 4.4rem) 0 clamp(2rem, 5vw, 3.4rem);
  background:
    radial-gradient(120% 150% at 86% 0%, rgba(31, 227, 196, .20), transparent 56%),
    radial-gradient(90% 120% at 4% 100%, rgba(244, 183, 64, .14), transparent 60%),
    linear-gradient(178deg, var(--deep) 0%, var(--midnight) 100%);
  color: var(--white);
  overflow: hidden;
  border-radius: var(--radius-lg);
  max-width: calc(var(--wrap) - 2 * var(--pad-x));
  margin-left: auto;
  margin-right: auto;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(147, 161, 174, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(147, 161, 174, .08) 1px, transparent 1px);
  background-size: 58px 58px;
  pointer-events: none;
}
.page-faq .faq-hero > * { position: relative; z-index: 1; }

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: center;
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .22em;
  color: var(--cyan);
}
.page-faq .faq-hero h1 {
  margin: .7rem 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.95rem, 5.4vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: .03em;
  color: var(--white);
}
.page-faq .faq-hero__lede {
  margin: 1.1rem 0 0;
  max-width: 46ch;
  font-size: clamp(.95rem, 1.6vw, 1.02rem);
  line-height: 1.8;
  color: #C6D3DE;
}
.page-faq .faq-hero__hint {
  margin: .9rem 0 0;
  max-width: 46ch;
  font-size: .84rem;
  line-height: 1.75;
  color: var(--cool-gray);
  padding-left: .9rem;
  border-left: 2px solid var(--cyan);
}

.page-faq .faq-hero__figure {
  margin: 0;
  padding: .65rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(31, 227, 196, .30);
  background: rgba(4, 16, 27, .5);
  box-shadow: 0 30px 60px -40px rgba(0, 0, 0, .95);
}
.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(var(--radius-lg) - 12px);
  object-fit: cover;
}
.page-faq .faq-hero__figure .figure-cap {
  display: block;
  margin: .6rem .2rem .1rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--cool-gray);
}

/* ---------- 数据带 ---------- */
.page-faq .faq-stats {
  list-style: none;
  margin: clamp(1.8rem, 4vw, 2.8rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(147, 161, 174, .26);
  border: 1px solid rgba(147, 161, 174, .26);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-faq .faq-stats li {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: 1rem 1.1rem;
  background: rgba(10, 26, 42, .82);
}
.page-faq .faq-stats b {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  letter-spacing: .02em;
  color: var(--cyan);
  line-height: 1;
}
.page-faq .faq-stats span {
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--cool-gray);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.4rem, 3vw, 2.4rem);
  padding-top: clamp(2rem, 5vw, 3.4rem);
  padding-bottom: clamp(2.6rem, 6vw, 4.5rem);
}

/* ---------- 左栏索引 ---------- */
.page-faq .faq-rail {
  background: linear-gradient(180deg, var(--midnight) 0%, var(--deep) 100%);
  border-radius: var(--radius-lg);
  padding: 1.3rem 1.1rem 1.15rem;
  color: var(--white);
  box-shadow: 0 26px 50px -38px rgba(4, 16, 27, .95);
}
.page-faq .faq-rail .rail-title {
  margin: 0 0 .9rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .22em;
  color: var(--cyan);
}
.page-faq .faq-rail__nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .2rem;
}
.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  padding: .58rem .6rem;
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
  color: var(--cool-gray);
  text-decoration: none;
  font-size: .88rem;
  line-height: 1.35;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.page-faq .faq-rail__link .mono {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .08em;
  color: inherit;
  flex: 0 0 auto;
}
.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  background: rgba(31, 227, 196, .1);
  color: var(--white);
}
.page-faq .faq-rail__link[aria-current="true"],
.page-faq .faq-rail__link[aria-current="page"] {
  background: rgba(31, 227, 196, .16);
  border-left-color: var(--cyan);
  color: var(--white);
}
.page-faq .faq-rail__link[aria-current="true"] .mono,
.page-faq .faq-rail__link[aria-current="page"] .mono {
  color: var(--cyan);
}
.page-faq .faq-rail__back {
  margin-top: 1rem;
  width: 100%;
  justify-content: center;
}

/* ---------- 右栏主体 ---------- */
.page-faq .faq-body {
  display: flex;
  flex-direction: column;
  gap: clamp(1.3rem, 3vw, 2.2rem);
  min-width: 0;
}

.page-faq .faq-group {
  background: var(--white);
  border: 1px solid rgba(10, 26, 42, .08);
  border-radius: var(--radius-lg);
  padding: clamp(1.2rem, 3vw, 1.9rem);
  box-shadow: 0 28px 54px -46px rgba(4, 16, 27, .85);
  scroll-margin-top: 5.5rem;
  min-width: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: .35rem .9rem;
  padding-bottom: .95rem;
  margin-bottom: 1.1rem;
  border-bottom: 2px solid rgba(10, 26, 42, .08);
}
.page-faq .faq-group__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.9rem;
  height: 2.05rem;
  padding: 0 .55rem;
  border-radius: 999px;
  background: var(--midnight);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: .92rem;
  font-weight: 700;
  letter-spacing: .1em;
}
.page-faq .faq-group h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.6vw, 1.55rem);
  letter-spacing: .03em;
  color: var(--deep);
}
.page-faq .faq-group__desc {
  grid-column: 2;
  margin: 0;
  font-size: .86rem;
  line-height: 1.7;
  color: var(--faq-muted);
}

/* ---------- 条目 ---------- */
.page-faq .qa {
  border: 1px solid rgba(10, 26, 42, .1);
  border-radius: var(--radius-md);
  background: var(--white);
  margin-bottom: .6rem;
  overflow: hidden;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.page-faq .qa:last-of-type { margin-bottom: 0; }
.page-faq .qa:hover { border-color: rgba(31, 227, 196, .45); }
.page-faq .qa[open] {
  border-color: rgba(31, 227, 196, .7);
  box-shadow: 0 18px 34px -30px rgba(4, 16, 27, .9);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  padding: .85rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .97rem;
  line-height: 1.55;
  color: var(--deep);
  transition: background var(--t-fast);
}
.page-faq .qa__q::-webkit-details-marker { display: none; }
.page-faq .qa__q::marker { content: ""; }
.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible { background: rgba(31, 227, 196, .07); }

.page-faq .qa__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .07em;
  color: var(--faq-cyan-ink);
  position: relative;
  top: -.05em;
}
.page-faq .qa__qtext { flex: 1 1 auto; min-width: 0; }

.page-faq .qa__mark {
  flex: 0 0 auto;
  position: relative;
  width: 1.05rem;
  height: 1.05rem;
  align-self: center;
}
.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--faq-cyan-ink);
  transition: transform var(--t-mid), opacity var(--t-fast);
}
.page-faq .qa__mark::before { width: .88rem; height: 2px; transform: translate(-50%, -50%); }
.page-faq .qa__mark::after { width: 2px; height: .88rem; transform: translate(-50%, -50%); }
.page-faq .qa[open] .qa__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .qa__a {
  padding: .95rem 1rem 1.15rem;
  border-top: 1px dashed rgba(10, 26, 42, .14);
  font-size: .91rem;
  line-height: 1.8;
  color: var(--faq-text);
}
.page-faq .qa__a p { margin: 0 0 .55rem; }
.page-faq .qa__a p:last-child { margin-bottom: 0; }
.page-faq .qa__a a {
  color: var(--faq-cyan-ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 125, 108, .35);
  transition: border-color var(--t-fast), color var(--t-fast);
}
.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  border-bottom-color: var(--faq-cyan-ink);
  color: var(--deep);
}

.page-faq .plain-list {
  list-style: none;
  margin: .55rem 0 .6rem;
  padding: 0;
}
.page-faq .plain-list li {
  position: relative;
  padding: .28rem 0 .28rem 1.1rem;
}
.page-faq .plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .95rem;
  width: .42rem;
  height: 2px;
  background: var(--gold);
}

.page-faq .steps {
  list-style: none;
  counter-reset: faqstep;
  margin: .75rem 0 .7rem;
  padding: 0 0 0 .1rem;
  border-left: 2px solid rgba(31, 227, 196, .5);
}
.page-faq .steps li {
  position: relative;
  counter-increment: faqstep;
  padding: .3rem 0 .3rem 2.5rem;
}
.page-faq .steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: .7rem;
  top: .38rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .06em;
  color: var(--faq-cyan-ink);
}

.page-faq .mark {
  background: rgba(244, 183, 64, .38);
  color: var(--deep);
  padding: 0 .2em;
  border-radius: 3px;
}

.page-faq .faq-shot {
  margin: 1.1rem 0 0;
  padding: .6rem;
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, rgba(31, 227, 196, .1), rgba(244, 183, 64, .08));
  border: 1px solid rgba(10, 26, 42, .08);
}
.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(var(--radius-md) - 6px);
  object-fit: cover;
}
.page-faq .faq-shot .figure-cap {
  display: block;
  margin: .55rem .2rem .1rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .08em;
  color: var(--faq-muted);
}

.page-faq .faq-group__top {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin-top: 1.15rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--faq-cyan-ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-fast), color var(--t-fast);
}
.page-faq .faq-group__top::before {
  content: "▲";
  font-size: .58rem;
  transform: translateY(-1px);
}
.page-faq .faq-group__top:hover,
.page-faq .faq-group__top:focus-visible {
  border-bottom-color: currentColor;
  color: var(--deep);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-faq .faq-rail__nav { grid-template-columns: 1fr; }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    max-width: none;
    margin-left: 0;
    margin-right: 0;
  }
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-rail {
    position: sticky;
    top: 5.5rem;
  }
  .page-faq .faq-group__head {
    grid-template-columns: auto minmax(0, 1fr);
  }
}

@media (max-width: 420px) {
  .page-faq .qa__q { flex-wrap: wrap; }
  .page-faq .qa__mark { order: 3; }
  .page-faq .faq-hero__hint { padding-left: .7rem; }
  .page-faq .steps li { padding-left: 2.1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }
}
<<<END>>>