.page-faq {
  --faq-gap: clamp(16px, 3vw, 28px);
  --faq-pad: clamp(20px, 3.4vw, 34px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* 首屏：框景 + 非对称双栏 */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(14px, 2.6vw, 26px);
  padding: clamp(22px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 130% at 4% 0%, rgba(33, 212, 180, 0.13), transparent 58%),
    radial-gradient(110% 120% at 100% 100%, rgba(138, 125, 255, 0.14), transparent 62%),
    var(--ink-700);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--gold), rgba(216, 179, 106, 0.05) 72%, transparent);
}

.page-faq .faq-hero__copy {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  max-width: 56ch;
  margin: 16px 0 0;
  color: var(--paper);
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.75;
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__jump a {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  color: var(--paper);
  font-size: 14px;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  border-color: var(--teal);
  background: rgba(33, 212, 180, 0.1);
  color: var(--teal);
}

.page-faq .faq-hero__board {
  position: relative;
  z-index: 1;
  align-self: start;
  padding: clamp(18px, 3vw, 24px);
  border: 1px solid rgba(216, 179, 106, 0.28);
  border-radius: var(--radius-md);
  background: rgba(4, 16, 26, 0.62);
}

.page-faq .faq-hero__board-title {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-faq .faq-hero__stats {
  display: grid;
  gap: 12px;
  margin: 0;
}

.page-faq .faq-hero__stat {
  display: grid;
  gap: 2px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero__stat:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-hero__stat dt {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-faq .faq-hero__stat dd {
  margin: 0;
  color: var(--paper);
  font-size: 15px;
  line-height: 1.5;
}

.page-faq .faq-hero__board-note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(33, 212, 180, 0.35);
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* 问答工作台 */
.page-faq .faq-workbench {
  display: grid;
  gap: clamp(20px, 3.6vw, 40px);
  margin-top: clamp(26px, 5vw, 52px);
}

.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail__label {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-rail__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 2px 8px;
  scrollbar-width: thin;
}

.page-faq .faq-rail__nav a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  background: rgba(15, 42, 64, 0.72);
  color: var(--paper);
  font-size: 14px;
  letter-spacing: 0.03em;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-faq .faq-rail__nav a:hover,
.page-faq .faq-rail__nav a:focus-visible {
  border-color: var(--cinnabar);
  background: var(--cinnabar-soft);
  transform: translateY(-1px);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--teal);
}

.page-faq .faq-rail__card {
  margin-top: 18px;
  padding: 18px 20px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: linear-gradient(170deg, rgba(15, 42, 64, 0.9), rgba(8, 24, 38, 0.7));
}

.page-faq .faq-rail__card-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-rail__card p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-rail__card .btn {
  width: 100%;
  justify-content: center;
}

/* 问答区块 */
.page-faq .faq-body {
  min-width: 0;
  display: grid;
  gap: clamp(18px, 3vw, 30px);
}

.page-faq .faq-section {
  padding: var(--faq-pad);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(15, 42, 64, 0.78), rgba(8, 24, 38, 0.58));
}

.page-faq .faq-section--help {
  border-color: rgba(224, 75, 63, 0.42);
  background:
    radial-gradient(100% 130% at 100% 0%, rgba(224, 75, 63, 0.16), transparent 62%),
    linear-gradient(180deg, rgba(15, 42, 64, 0.86), rgba(8, 24, 38, 0.7));
}

.page-faq .faq-section__head {
  display: grid;
  gap: 8px;
}

.page-faq .faq-section__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-faq .faq-section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--paper);
}

.page-faq .faq-section__intro {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* 示意图 */
.page-faq .faq-figure {
  margin: 20px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: var(--ink-800);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 8px;
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* 步骤卡 */
.page-faq .faq-steps {
  display: grid;
  gap: 12px;
  margin: 20px 0 4px;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-faq .faq-steps li {
  position: relative;
  padding: 16px 18px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(4, 16, 26, 0.55);
}

.page-faq .faq-steps li::after {
  content: "";
  position: absolute;
  inset-inline-start: 18px;
  top: 0;
  width: 34px;
  height: 2px;
  background: var(--gold);
}

.page-faq .faq-steps__num {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 9px;
  border: 1px solid rgba(33, 212, 180, 0.5);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--teal);
}

.page-faq .faq-steps h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* 手风琴问答 */
.page-faq .faq-list {
  margin-top: 18px;
  border-top: 1px solid var(--line-soft);
}

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

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color var(--t-fast) var(--ease);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-soft);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  color: var(--mist);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), transform var(--t-mid) var(--ease);
}

.page-faq .faq-item summary:hover {
  color: var(--teal);
}

.page-faq .faq-item summary:hover::after {
  border-color: var(--teal);
  color: var(--teal);
}

.page-faq .faq-item[open] summary {
  color: var(--teal);
}

.page-faq .faq-item[open] summary::after {
  content: "–";
  border-color: var(--cinnabar);
  color: var(--cinnabar);
  transform: rotate(180deg);
}

.page-faq .faq-item p {
  margin: 0 0 18px;
  padding-inline-start: 14px;
  border-inline-start: 2px solid rgba(216, 179, 106, 0.42);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper);
}

/* 设备兼容 */
.page-faq .faq-devices {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-devices__item {
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: rgba(4, 16, 26, 0.5);
}

.page-faq .faq-devices__os {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--violet);
}

.page-faq .faq-devices__item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist);
}

/* 联系引导 */
.page-faq .faq-help {
  display: grid;
  gap: 18px;
  margin-top: 20px;
  padding: clamp(16px, 3vw, 24px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(4, 16, 26, 0.6);
}

.page-faq .faq-help__list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__list li {
  position: relative;
  padding-inline-start: 20px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-help__list li::before {
  content: "";
  position: absolute;
  inset-inline-start: 4px;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
}

.page-faq .faq-help__side {
  min-width: 0;
  padding-top: 16px;
  border-top: 1px dashed rgba(216, 179, 106, 0.34);
}

.page-faq .faq-help__label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-faq .faq-help__mail {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(14px, 2.6vw, 17px);
  color: var(--gold);
  word-break: break-all;
}

.page-faq .faq-help__note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-help__more {
  margin: 18px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-help__more a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(33, 212, 180, 0.45);
}

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

/* 平板及以上 */
@media (min-width: 720px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-faq .faq-help__side {
    padding-top: 0;
    padding-inline-start: 20px;
    border-top: 0;
    border-inline-start: 1px dashed rgba(216, 179, 106, 0.34);
  }
}

/* 桌面：左栏常驻 + 右侧问答 */
@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    align-items: start;
    padding: clamp(32px, 3.6vw, 52px);
  }

  .page-faq .faq-workbench {
    grid-template-columns: minmax(0, 262px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-rail__nav {
    flex-direction: column;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-rail__nav a {
    width: 100%;
    border-radius: var(--radius-sm);
    white-space: normal;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__jump a,
  .page-faq .faq-rail__nav a,
  .page-faq .faq-item summary,
  .page-faq .faq-item summary::after {
    transition: none;
  }

  .page-faq .faq-rail__nav a:hover,
  .page-faq .faq-rail__nav a:focus-visible {
    transform: none;
  }

  .page-faq .faq-item[open] summary::after {
    transform: none;
  }
}
<<<END>>>