.page-faq {
  --faq-line: rgba(74, 102, 124, 0.36);
  background:
    radial-gradient(140% 100% at 50% 0%, #0b1f30 0%, var(--ink) 58%);
  color: var(--mist-soft);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq p {
  margin: 0 0 0.9rem;
}

.page-faq h2,
.page-faq h3 {
  margin: 0;
  font-family: var(--font-display);
  color: var(--cream);
}

.page-faq a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 209, 223, 0.4);
}

.page-faq a:hover,
.page-faq a:focus-visible {
  color: #7fe9f2;
  border-bottom-color: var(--cyan);
}

.page-faq .btn {
  border-bottom: 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.15rem, 3vw, 2rem) clamp(2rem, 5vw, 3.4rem);
  border-bottom: 1px solid var(--hair-soft);
  background:
    radial-gradient(90% 80% at 88% 8%, rgba(57, 209, 223, 0.13), transparent 62%),
    linear-gradient(180deg, #0a1e2f 0%, var(--ink) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--hair-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--hair-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.55;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 86%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 86%);
  pointer-events: none;
}

.page-faq .faq-hero .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 1.75rem;
  margin-top: 1.25rem;
}

.page-faq .faq-hero h1 {
  margin: 0.55rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 6vw, 3.15rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--cream);
  text-wrap: balance;
}

.page-faq .faq-hero__lead {
  max-width: 60ch;
  margin: 1rem 0 0;
  font-size: clamp(0.94rem, 2.2vw, 1.05rem);
  line-height: 1.8;
  color: var(--mist-soft);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.page-faq .faq-hero__stats {
  border: 1px solid var(--hair);
  background: rgba(16, 43, 64, 0.72);
  padding: 0.95rem 1rem 1.05rem;
}

.page-faq .faq-hero__stats-title {
  margin: 0 0 0.75rem;
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  color: var(--cyan);
}

.page-faq .faq-hero__stats dl {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair-soft);
}

.page-faq .faq-stat {
  margin: 0;
  padding: 0.7rem 0.65rem;
  background: rgba(8, 24, 38, 0.92);
}

.page-faq .faq-stat dt {
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--mist-dim);
}

.page-faq .faq-stat dd {
  margin: 0.15rem 0 0;
}

.page-faq .faq-stat__num {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cream);
  letter-spacing: 0.02em;
}

/* ---------- 序号 2 提示条 ---------- */
.page-faq .faq-pin {
  background: linear-gradient(90deg, rgba(241, 120, 60, 0.16), rgba(241, 120, 60, 0.03) 62%, transparent);
  border-block: 1px solid rgba(241, 120, 60, 0.4);
}

.page-faq .faq-pin__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding-block: 0.8rem;
}

.page-faq .faq-pin__badge {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.2rem;
  height: 2.2rem;
  padding: 0 0.4rem;
  background: var(--orange);
  color: #150a05;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.page-faq .faq-pin__text {
  flex: 1 1 15rem;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .faq-pin__text strong {
  color: var(--cream);
}

.page-faq .faq-pin__link {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  white-space: nowrap;
  border-bottom: 0;
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  padding-block: clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-body__inner {
  display: grid;
  gap: 2rem;
}

.page-faq .faq-rail {
  border-top: 2px solid var(--orange);
  padding-top: 0.85rem;
}

.page-faq .faq-rail__title {
  margin: 0 0 0.7rem;
  font-size: 0.66rem;
  letter-spacing: 0.26em;
  color: var(--mist-dim);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 1.25rem;
}

.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  padding: 0.45rem 0;
  font-size: 0.9rem;
  color: var(--mist-soft);
  border-bottom: 1px solid var(--hair-soft);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-rail__list .mono {
  flex: none;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--orange);
}

/* ---------- 章节骨架 ---------- */
.page-faq .faq-block {
  scroll-margin-top: 1.5rem;
}

.page-faq .faq-main > .faq-block:not(:first-child) {
  margin-top: 2.25rem;
  padding-top: 2.25rem;
  border-top: 1px solid var(--hair-soft);
}

.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin-bottom: 0.6rem;
}

.page-faq .faq-block__num {
  flex: none;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-faq .faq-block h2 {
  font-size: clamp(1.25rem, 3.6vw, 1.85rem);
  font-weight: 800;
  line-height: 1.3;
}

.page-faq .faq-block__lead {
  max-width: 64ch;
  margin-bottom: 1.35rem;
  color: var(--mist-soft);
}

.page-faq .faq-block__tail {
  margin: 1.15rem 0 0;
  font-size: 0.88rem;
  color: var(--mist-dim);
}

.page-faq .faq-block:target .faq-block__num {
  background: var(--cyan);
  color: #04141d;
  padding: 0.12rem 0.4rem;
  letter-spacing: 0.1em;
}

/* ---------- 三步路径 ---------- */
.page-faq .step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-faq .step-list__item {
  position: relative;
  padding: 1.1rem 1.1rem 1.25rem;
  background: rgba(16, 43, 64, 0.6);
}

.page-faq .step-list__item--hot {
  background: rgba(241, 120, 60, 0.1);
  box-shadow: inset 0 2px 0 var(--orange);
}

.page-faq .step-list__num {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-faq .step-list__item--hot .step-list__num {
  color: var(--orange);
}

.page-faq .step-list h3 {
  margin-bottom: 0.4rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--cream);
}

.page-faq .step-list p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--mist-soft);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 1.3rem 0 1.15rem;
}

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

/* ---------- 问答 ---------- */
.page-faq .faq-sub {
  margin: 1.5rem 0 0.5rem;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--cyan);
}

.page-faq .qa-group {
  border-top: 1px solid var(--hair-soft);
}

.page-faq .qa {
  border-bottom: 1px solid var(--hair-soft);
}

.page-faq .qa > summary {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  padding: 0.85rem 0;
  list-style: none;
  cursor: pointer;
  font-size: 0.94rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--cream);
}

.page-faq .qa > summary::-webkit-details-marker {
  display: none;
}

.page-faq .qa > summary::before {
  content: "";
  flex: none;
  width: 0.4rem;
  height: 0.4rem;
  background: var(--orange);
  transform: rotate(45deg) translateY(-1px);
}

.page-faq .qa > summary::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .qa[open] > summary {
  color: var(--cyan);
}

.page-faq .qa[open] > summary::after {
  content: "−";
}

.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .qa__body {
  padding: 0 0 0.95rem 1.05rem;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist-soft);
}

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

/* ---------- 筛选层级 ---------- */
.page-faq .filter-chain {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-faq .filter-chain li {
  padding: 0.8rem 0.75rem;
  background: rgba(16, 43, 64, 0.6);
}

.page-faq .filter-chain__step {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  color: var(--mint);
}

.page-faq .filter-chain__name {
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--cream);
}

/* ---------- 提示卡 ---------- */
.page-faq .faq-note {
  margin-top: 1.35rem;
  padding: 1rem 1.05rem;
  border-left: 3px solid var(--amber);
  background: rgba(233, 178, 75, 0.08);
}

.page-faq .faq-note__title {
  margin: 0 0 0.5rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--amber);
}

.page-faq .faq-note ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist-soft);
}

.page-faq .faq-note li {
  margin-bottom: 0.3rem;
}

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

/* ---------- 联系支持 ---------- */
.page-faq .support-grid {
  display: grid;
  gap: 1px;
  margin-bottom: 1.15rem;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-faq .support-card {
  padding: 1rem 1.05rem;
  background: rgba(16, 43, 64, 0.62);
}

.page-faq .support-card__key {
  margin: 0 0 0.3rem;
  font-size: 0.64rem;
  letter-spacing: 0.24em;
  color: var(--cyan);
}

.page-faq .support-card__val {
  margin: 0 0 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.98rem;
  color: var(--cream);
  word-break: break-word;
}

.page-faq .support-card__note {
  margin: 0;
  font-size: 0.78rem;
  color: var(--mist-dim);
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-faq .step-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-faq .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    gap: 3rem;
    align-items: end;
  }

  .page-faq .faq-body__inner {
    grid-template-columns: 198px minmax(0, 1fr);
    gap: 3.5rem;
    align-items: start;
  }

  .page-faq .faq-rail__list {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .page-faq .faq-block__num {
    padding-top: 0.28rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa > summary,
  .page-faq .faq-rail__list a {
    transition: none;
  }
}