.page-faq {
  --faq-pad: clamp(16px, 4vw, 40px);
  --faq-gap: clamp(20px, 3vw, 34px);
  background: var(--carbon-950);
  color: var(--paper);
  font-family: var(--font-sans);
  line-height: 1.7;
  overflow-x: hidden;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  margin: 0;
  font-weight: 700;
  line-height: 1.25;
}

.page-faq p {
  margin: 0;
}

.page-faq ul,
.page-faq ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.page-faq .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
  border-radius: 6px;
}

/* 面包屑 */
.page-faq .faq-crumb-wrap {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--faq-pad) 0;
}

.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-faq .faq-crumb a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .faq-crumb a:hover {
  color: var(--paper);
}

.page-faq .faq-crumb [aria-current="page"] {
  color: var(--paper-muted);
}

/* 首屏框景 */
.page-faq .faq-hero {
  position: relative;
  max-width: var(--rail);
  margin: 16px auto 0;
  padding: clamp(24px, 5vw, 54px) clamp(18px, 4vw, 46px) clamp(22px, 4vw, 40px);
  border: 1px solid var(--carbon-700);
  border-radius: var(--radius-panel);
  background:
    radial-gradient(120% 140% at 92% -10%, rgba(0, 229, 199, 0.16), transparent 58%),
    radial-gradient(100% 130% at 0% 110%, rgba(255, 90, 31, 0.18), transparent 62%),
    var(--carbon-900);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: -42%;
  height: 62%;
  background: linear-gradient(100deg, rgba(255, 90, 31, 0.2), rgba(0, 229, 199, 0.12) 58%, transparent);
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-faq .faq-hero__frame {
  position: absolute;
  inset: 12px;
  border-radius: 18px;
  pointer-events: none;
  background:
    repeating-linear-gradient(90deg, var(--carbon-700) 0 2px, transparent 2px 14px) top left / 100% 1px no-repeat,
    repeating-linear-gradient(90deg, var(--carbon-700) 0 2px, transparent 2px 14px) bottom left / 100% 1px no-repeat,
    repeating-linear-gradient(0deg, var(--carbon-700) 0 2px, transparent 2px 14px) top left / 1px 100% no-repeat,
    repeating-linear-gradient(0deg, var(--carbon-700) 0 2px, transparent 2px 14px) top right / 1px 100% no-repeat;
}

.page-faq .faq-kicker {
  position: relative;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
  text-transform: uppercase;
}

.page-faq .faq-title {
  position: relative;
  margin-top: 14px;
  font-size: clamp(30px, 6.4vw, 54px);
  letter-spacing: -0.01em;
  max-width: 20ch;
}

.page-faq .faq-lead {
  position: relative;
  margin-top: 18px;
  max-width: 62ch;
  font-size: clamp(15px, 1.7vw, 17px);
  color: var(--paper-muted);
}

.page-faq .faq-stats {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(22px, 4vw, 34px);
}

.page-faq .faq-stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-card);
  border: 1px solid var(--carbon-700);
  background: rgba(11, 13, 14, 0.72);
}

.page-faq .faq-stat__num {
  font-family: var(--font-display);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-faq .faq-stat__num small {
  font-size: 18px;
  margin-left: 2px;
}

.page-faq .faq-stat__num--cyan {
  color: var(--cyan);
}

.page-faq .faq-stat__num--orange {
  color: var(--orange);
}

.page-faq .faq-stat__txt {
  font-size: 13px;
  color: var(--paper-muted);
}

/* 路线图 */
.page-faq .faq-hero__map {
  position: relative;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-faq .faq-route {
  display: none;
  width: 100%;
  height: auto;
}

.page-faq .faq-route__num {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  fill: var(--paper);
}

.page-faq .faq-route__label {
  font-family: var(--font-mono);
  font-size: 17px;
  letter-spacing: 0.06em;
  fill: var(--paper-muted);
}

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

.page-faq .faq-route-stack li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--carbon-700);
  background: rgba(20, 24, 26, 0.85);
  font-size: 14px;
}

.page-faq .faq-route-stack .mono {
  font-size: 11px;
  color: var(--orange);
}

/* 通用章节 */
.page-faq .faq-section {
  max-width: var(--shell);
  margin: clamp(40px, 7vw, 82px) auto 0;
  padding: 0 var(--faq-pad);
}

.page-faq .faq-index {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-faq .faq-section__head h2,
.page-faq .faq-split__text h2 {
  margin-top: 10px;
  font-size: clamp(23px, 4vw, 34px);
  max-width: 24ch;
}

.page-faq .faq-intro {
  margin-top: 12px;
  max-width: 66ch;
  font-size: clamp(14px, 1.6vw, 16px);
  color: var(--paper-muted);
}

/* 图片框 */
.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border-radius: var(--radius-card);
  border: 1px solid var(--carbon-700);
  background: var(--carbon-800);
  overflow: hidden;
}

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

.page-faq .faq-figure__cap {
  display: block;
  padding: 10px 16px;
  font-size: 11px;
  color: var(--slate);
  border-top: 1px solid var(--carbon-700);
}

/* 三步卡片 */
.page-faq .faq-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-faq .faq-step {
  position: relative;
  padding: 20px 20px 22px;
  border-radius: var(--radius-card);
  border: 1px solid var(--carbon-700);
  background: var(--carbon-800);
  transition: transform var(--mid) var(--ease), border-color var(--mid) var(--ease);
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  width: 34px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
}

.page-faq .faq-step:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.page-faq .faq-step__n {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-faq .faq-step h3 {
  margin-top: 8px;
  font-size: 18px;
}

.page-faq .faq-step p {
  margin-top: 8px;
  font-size: 14px;
  color: var(--paper-muted);
}

/* 索引 + 问答 */
.page-faq .faq-guide {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  max-width: var(--shell);
  margin: clamp(40px, 7vw, 82px) auto 0;
  padding: 0 var(--faq-pad);
}

.page-faq .faq-side {
  border-radius: var(--radius-card);
  border: 1px solid var(--carbon-700);
  background: var(--carbon-900);
  padding: 18px;
}

.page-faq .faq-side__title {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.page-faq .faq-side__list {
  margin-top: 12px;
  display: grid;
  gap: 2px;
}

.page-faq .faq-side__list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 10px;
  border-left: 2px solid var(--carbon-700);
  color: var(--paper-muted);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease), background var(--fast) var(--ease);
}

.page-faq .faq-side__list a:hover {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: var(--carbon-800);
}

.page-faq .faq-side__list .mono {
  font-size: 11px;
  color: var(--orange);
}

.page-faq .faq-side__note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--carbon-700);
  font-size: 12px;
  color: var(--slate);
}

.page-faq .faq-item {
  margin-bottom: 12px;
  border-radius: var(--radius-card);
  border: 1px solid var(--carbon-700);
  background: var(--carbon-800);
  overflow: hidden;
  transition: border-color var(--mid) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(0, 229, 199, 0.45);
}

.page-faq .faq-item[open] {
  border-color: rgba(0, 229, 199, 0.55);
}

.page-faq .faq-item__sum {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__sum::marker {
  content: "";
}

.page-faq .faq-item__sum::after {
  content: "+";
  flex: none;
  width: 22px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__sum::after {
  content: "–";
  color: var(--orange);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex: 1;
  font-size: clamp(15px, 2vw, 17px);
}

.page-faq .faq-item__idx {
  flex: none;
  font-size: 11px;
  color: var(--orange);
}

.page-faq .faq-item__body {
  position: relative;
  padding: 0 18px 20px 40px;
  font-size: 14px;
  color: var(--paper-muted);
}

.page-faq .faq-item__body::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 4px;
  bottom: 22px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(0, 229, 199, 0));
}

.page-faq .faq-item__body p + p {
  margin-top: 10px;
}

.page-faq .faq-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.page-faq .faq-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 5px 13px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--carbon-700);
  background: var(--carbon-900);
  color: var(--paper-muted);
}

.page-faq .faq-tag--on {
  border-color: var(--orange);
  background: rgba(255, 90, 31, 0.16);
  color: var(--paper);
}

/* 视图章节 */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: center;
}

.page-faq .faq-modes {
  display: grid;
  gap: 12px;
  margin: 20px 0 22px;
}

.page-faq .faq-modes li {
  padding: 16px 18px;
  border-radius: var(--radius-card);
  border: 1px solid var(--carbon-700);
  background: var(--carbon-900);
}

.page-faq .faq-modes strong {
  display: block;
  font-size: 15px;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-faq .faq-modes span {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--paper-muted);
}

.page-faq .faq-tablet {
  position: relative;
  padding: 12px 12px 20px;
  border-radius: 26px;
  border: 1px solid var(--carbon-700);
  background: linear-gradient(160deg, var(--carbon-800), var(--carbon-950));
  box-shadow: 0 24px 48px -28px rgba(0, 0, 0, 0.95);
  overflow: hidden;
}

.page-faq .faq-tablet::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 8px;
  width: 62px;
  height: 3px;
  transform: translateX(-50%);
  border-radius: 2px;
  background: var(--carbon-700);
}

.page-faq .faq-tablet img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  object-fit: cover;
}

.page-faq .faq-split__visual .faq-figure__cap {
  border-top: 0;
  padding: 12px 2px 0;
}

/* 求助章节 */
.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  border-radius: var(--radius-card);
  border: 1px solid var(--carbon-700);
  background: var(--carbon-800);
}

.page-faq .faq-card h3 {
  font-size: 16px;
}

.page-faq .faq-card p {
  font-size: 14px;
  color: var(--paper-muted);
}

.page-faq .faq-card .btn {
  align-self: flex-start;
  margin-top: auto;
}

.page-faq .faq-card--paper {
  background: var(--paper);
  border-color: transparent;
}

.page-faq .faq-card--paper h3 {
  color: var(--carbon-950);
}

.page-faq .faq-card--paper p {
  color: var(--carbon-800);
}

.page-faq .faq-card__tel {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-faq .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--carbon-700);
  background: var(--carbon-900);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: border-color var(--fast) var(--ease), color var(--fast) var(--ease), background var(--fast) var(--ease);
}

.page-faq .btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--carbon-950);
}

.page-faq .btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .btn--primary:hover {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-faq .faq-links a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 199, 0.35);
  padding-bottom: 2px;
}

.page-faq .faq-links a:hover {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

@media (min-width: 560px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 720px) {
  .page-faq .faq-route {
    display: block;
  }

  .page-faq .faq-route-stack {
    display: none;
  }

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

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

  .page-faq .faq-item__body {
    padding-left: 46px;
  }

  .page-faq .faq-item__body::before {
    left: 28px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-guide {
    grid-template-columns: 248px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-item,
  .page-faq .btn,
  .page-faq .faq-side__list a {
    transition: none;
  }

  .page-faq .faq-step:hover {
    transform: none;
  }
}
<<<END>>>