.page-faq {
  --faq-rail-w: 300px;
  --faq-line: rgba(110, 139, 128, 0.42);
  background: var(--ink);
  color: var(--cream);
  overflow-x: clip;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: -0.01em;
  line-height: 1.04;
}

.page-faq p {
  margin: 0;
}

.page-faq .page-faq__mono {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
}

/* 首屏 */
.page-faq__hero {
  position: relative;
  padding-block: clamp(22px, 5vw, 44px) clamp(34px, 6vw, 72px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(63, 255, 210, 0.16), transparent 58%),
    radial-gradient(90% 80% at 4% 106%, rgba(255, 107, 44, 0.13), transparent 62%),
    var(--ink-deep);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq__hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-faq__hero .breadcrumbs {
  margin-bottom: 20px;
  font-size: 13px;
}

.page-faq__hero h1 {
  margin-top: 14px;
  font-size: clamp(34px, 7.4vw, 62px);
  line-height: 0.98;
  max-width: 16ch;
}

.page-faq__lede {
  margin-top: 20px;
  max-width: 48ch;
  font-size: clamp(16px, 1.15vw, 18px);
  line-height: 1.78;
  color: var(--mist);
}

.page-faq__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-faq__jump-link {
  display: inline-block;
  padding: 7px 13px;
  border: 1px solid var(--faq-line);
  background: rgba(20, 63, 53, 0.66);
  color: var(--cream);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq__jump-link:hover,
.page-faq__jump-link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(11, 59, 46, 0.9);
}

/* 第二栏快捷通道 */
.page-faq__rail {
  padding: 18px;
  border: 1px solid var(--faq-line);
  border-top: 2px solid var(--cyan);
  background: linear-gradient(180deg, rgba(20, 63, 53, 0.94), rgba(6, 31, 24, 0.94));
  backdrop-filter: blur(6px);
}

.page-faq__rail-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq__rail-time {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin-top: 10px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--faq-line);
  color: var(--mist);
}

.page-faq__rail-btn {
  display: block;
  width: 100%;
  margin-top: 12px;
  text-align: center;
}

.page-faq__rail-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-faq__rail-list a {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 3px;
}

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

/* 三步速查 */
.page-faq__steps {
  padding-block: clamp(38px, 6vw, 76px);
  background: var(--ink);
}

.page-faq__steps-head h2 {
  margin-top: 12px;
  font-size: clamp(26px, 3.6vw, 40px);
  max-width: 20ch;
}

.page-faq__steps-note {
  margin-top: 14px;
  max-width: 52ch;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.76;
}

.page-faq__step-list {
  counter-reset: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq__step {
  position: relative;
  padding: 20px 18px 22px;
  border: 1px solid var(--faq-line);
  border-top: 2px solid var(--orange);
  background: rgba(20, 63, 53, 0.55);
}

.page-faq__step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-faq__step h3 {
  margin-top: 10px;
  font-size: clamp(18px, 2.2vw, 22px);
  color: var(--cream);
}

.page-faq__step p {
  margin-top: 10px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.72;
}

.page-faq__shot {
  margin: clamp(26px, 4vw, 40px) 0 0;
  border: 1px solid var(--faq-line);
  background: var(--glass);
}

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

.page-faq__shot .media-caption {
  display: block;
  padding: 12px 16px;
  border-top: 1px solid var(--faq-line);
  color: var(--mist);
  font-size: 13px;
  line-height: 1.6;
}

/* 问答区 */
.page-faq__qa {
  padding-block: clamp(38px, 6vw, 76px);
  background: linear-gradient(180deg, var(--ink), var(--ink-deep));
  border-top: 1px solid var(--faq-line);
}

.page-faq__qa-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

.page-faq__qa-title {
  font-size: clamp(26px, 3.6vw, 40px);
}

.page-faq__qa-sub {
  margin-top: 12px;
  max-width: 50ch;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq__group {
  margin-top: clamp(26px, 4vw, 40px);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq__group-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--faq-line);
  font-size: clamp(18px, 2.3vw, 23px);
  color: var(--cyan);
}

.page-faq__group-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
  padding: 3px 8px;
  border: 1px solid var(--faq-line);
}

.page-faq__item {
  border: 1px solid var(--faq-line);
  border-left: 3px solid transparent;
  background: rgba(20, 63, 53, 0.5);
  margin-top: 10px;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq__item:hover {
  border-left-color: var(--line);
}

.page-faq__item[open] {
  border-left-color: var(--cyan);
  background: rgba(20, 63, 53, 0.86);
}

.page-faq__item > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.35;
  color: var(--cream);
  transition: color 0.18s var(--ease);
}

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

.page-faq__item > summary::after {
  content: "";
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-left: auto;
  margin-top: 4px;
  background:
    linear-gradient(var(--cyan), var(--cyan)) center / 14px 2px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) center / 2px 14px no-repeat;
  transition: transform 0.22s var(--ease);
}

.page-faq__item[open] > summary::after {
  transform: rotate(90deg);
}

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

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

.page-faq__answer {
  padding: 0 16px 18px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.78;
  max-width: 62ch;
}

/* 分组索引 */
.page-faq__index {
  padding: 18px;
  border: 1px solid var(--faq-line);
  border-left: 2px solid var(--cyan);
  background: rgba(6, 31, 24, 0.8);
}

.page-faq__index-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq__index-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq__index-list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  color: var(--cream);
  font-size: 14px;
  text-decoration: none;
  padding-bottom: 7px;
  border-bottom: 1px solid var(--faq-line);
}

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

.page-faq__index-cta {
  display: inline-block;
  margin-top: 16px;
  color: var(--orange);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  padding-bottom: 2px;
}

/* 反馈模板区（浅色展签） */
.page-faq__device {
  padding-block: clamp(38px, 6vw, 76px);
  background: var(--paper);
  color: var(--brown);
}

.page-faq__device-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-faq__device .eyebrow--dark {
  color: #7a3a14;
}

.page-faq__device h2 {
  margin-top: 12px;
  font-size: clamp(25px, 3.5vw, 38px);
  max-width: 20ch;
}

.page-faq__device-copy > p {
  margin-top: 14px;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.76;
  color: #3a2f28;
}

.page-faq__template {
  margin: 22px 0 0;
  padding: 16px 18px;
  border-left: 4px solid var(--orange);
  background: rgba(11, 59, 46, 0.07);
  color: var(--brown);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.95;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.page-faq__mail {
  margin-top: 20px;
}

.page-faq__device-note {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: #5b4c42;
}

.page-faq__shot--device {
  margin-top: 0;
  border-color: rgba(26, 21, 18, 0.22);
  background: #efe2cb;
}

.page-faq__shot--device .media-caption {
  border-top-color: rgba(26, 21, 18, 0.22);
  color: #4a3c33;
}

/* 联系收尾 */
.page-faq__contact {
  padding-block: clamp(36px, 5.5vw, 68px);
  background:
    radial-gradient(90% 100% at 100% 0%, rgba(255, 107, 44, 0.14), transparent 60%),
    var(--ink-deep);
}

.page-faq__contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-faq__contact h2 {
  font-size: clamp(24px, 3.4vw, 36px);
  max-width: 18ch;
}

.page-faq__contact p {
  margin-top: 14px;
  max-width: 46ch;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.76;
}

.page-faq__contact .btn {
  margin-top: 22px;
}

.page-faq__contact-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq__contact-list li {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(20, 63, 53, 0.7);
}

.page-faq__contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq__contact-value {
  color: var(--cream);
  text-decoration: none;
  overflow-wrap: anywhere;
  border-bottom: 1px solid transparent;
  justify-self: start;
}

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

/* 响应式 */
@media (min-width: 720px) {
  .page-faq__step-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .page-faq__device-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-faq__contact-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
  }

  .page-faq__contact-list li {
    grid-template-columns: 110px minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 980px) {
  .page-faq__hero-grid {
    grid-template-columns: minmax(0, 1fr) var(--faq-rail-w);
    gap: 48px;
  }

  .page-faq__rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq__qa-grid {
    grid-template-columns: minmax(0, 1fr) 250px;
    gap: 52px;
  }

  .page-faq__index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq__item,
  .page-faq__item > summary,
  .page-faq__item > summary::after,
  .page-faq__jump-link {
    transition: none;
  }
}
<<<END>>>