.page-faq {
  --faq-hair: rgba(143, 168, 184, 0.18);
  --faq-hair-strong: rgba(143, 168, 184, 0.38);
  --faq-surface: rgba(14, 42, 36, 0.62);
  --faq-surface-open: rgba(23, 63, 53, 0.62);
  background: var(--ink);
  color: var(--mist);
  padding-bottom: clamp(48px, 7vw, 104px);
  overflow-x: hidden;
}

.page-faq .faq-top {
  padding-top: clamp(16px, 2.6vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(18px, 3vw, 36px) 0 clamp(38px, 5.5vw, 76px);
}

.page-faq .faq-hero__frame {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  padding: clamp(24px, 4vw, 58px);
  background:
    linear-gradient(138deg, var(--panel) 0%, #0a1f1a 58%, var(--pine) 100%);
  border: 1px solid var(--faq-hair);
  clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 30px, 100% 100%, 30px 100%, 0 calc(100% - 30px));
  overflow: hidden;
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  top: -26%;
  right: -14%;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(255, 107, 26, 0.17), transparent 66%);
  pointer-events: none;
}

.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(201, 214, 221, 0.045) 0px,
    rgba(201, 214, 221, 0.045) 1px,
    transparent 1px,
    transparent 5px
  );
  pointer-events: none;
}

.page-faq .faq-hero__intro,
.page-faq .faq-hero__board {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 5.4vw, 68px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-faq .faq-hero__board {
  display: grid;
  gap: 1px;
  align-self: start;
  background: var(--faq-hair);
  border: 1px solid var(--faq-hair);
}

.page-faq .board-cell {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(7, 22, 19, 0.78);
  transition: background-color var(--dur) var(--ease);
}

.page-faq .board-cell:hover {
  background: rgba(23, 63, 53, 0.8);
}

.page-faq .board-num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.page-faq .board-label {
  font-size: 13px;
  line-height: 1.55;
  letter-spacing: 0.04em;
  color: var(--slate);
}

/* ---------- 三步排查 ---------- */
.page-faq .faq-quick {
  padding: clamp(20px, 3vw, 34px) 0 clamp(44px, 6vw, 88px);
}

.page-faq .faq-quick__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-faq .faq-quick .section-head p {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

.page-faq .step-list {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 30px);
  padding: clamp(18px, 2.6vw, 28px) 0;
  border-bottom: 1px solid var(--faq-hair);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .step:hover {
  border-bottom-color: var(--orange);
}

.page-faq .step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 300;
  line-height: 0.9;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--orange-soft);
}

.page-faq .step-num::after {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  margin-top: 12px;
  background: var(--orange);
  transform: skewX(-32deg);
}

.page-faq .step-body h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 1.6vw, 21px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-faq .step-body p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .path {
  display: inline-block;
  margin-top: 12px;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mint);
  background: rgba(61, 224, 174, 0.08);
  border: 1px solid rgba(61, 224, 174, 0.28);
}

.page-faq .faq-quick__figure {
  margin: 0;
  align-self: start;
  border: 1px solid var(--faq-hair);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
  overflow: hidden;
  background: var(--panel);
}

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

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  padding: clamp(12px, 2vw, 22px) 0 clamp(44px, 6vw, 84px);
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(24px, 3.6vw, 56px);
  padding-top: clamp(26px, 4vw, 48px);
}

.page-faq .faq-index {
  border: 1px solid var(--faq-hair);
  background: var(--faq-surface);
  padding: 18px 16px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange-soft);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 10px 10px 12px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--slate);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-index__list a::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--grid);
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--paper);
  border-left-color: var(--orange);
  background: rgba(23, 63, 53, 0.62);
}

.page-faq .faq-index__list a:hover::before,
.page-faq .faq-index__list a:focus-visible::before {
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(61, 224, 174, 0.18);
}

.page-faq .faq-index__hint {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-hair);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
}

.page-faq .faq-index__hint .path {
  margin-top: 0;
  font-size: 11.5px;
  padding: 0 5px;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 64px);
}

.page-faq .faq-group__title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__title::before {
  content: "";
  flex: none;
  width: 18px;
  height: 3px;
  background: var(--orange);
  transform: skewX(-32deg);
}

.page-faq details.faq-item {
  margin-top: 9px;
  background: var(--faq-surface);
  border: 1px solid var(--faq-hair);
  border-left: 2px solid var(--faq-hair-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq details.faq-item:hover {
  border-color: var(--faq-hair-strong);
  border-left-color: var(--orange);
}

.page-faq details.faq-item[open] {
  background: var(--faq-surface-open);
  border-left-color: var(--mint);
}

.page-faq details.faq-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: clamp(15px, 1.35vw, 18px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}

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

.page-faq details.faq-item summary::marker {
  content: "";
}

.page-faq details.faq-item summary::after {
  content: "+";
  flex: none;
  margin-top: -1px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.2;
  color: var(--orange);
}

.page-faq details.faq-item[open] summary::after {
  content: "−";
  color: var(--mint);
}

.page-faq details.faq-item summary:hover {
  color: var(--orange-soft);
}

.page-faq details.faq-item summary:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: -2px;
}

.page-faq .faq-item__body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--faq-hair);
  margin-top: 0;
}

.page-faq .faq-item__body p {
  margin: 13px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist);
}

.page-faq .faq-item__body a {
  color: var(--orange-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 179, 122, 0.42);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

/* ---------- 联系支持 ---------- */
.page-faq .faq-contact {
  padding: clamp(34px, 5vw, 64px) 0 0;
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding: clamp(22px, 3.4vw, 44px);
  background: linear-gradient(160deg, var(--pine) 0%, var(--panel) 62%, #0a1f1a 100%);
  border: 1px solid var(--faq-hair);
  border-top: 2px solid var(--orange);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .faq-contact__figure {
  margin: 0;
  align-self: stretch;
  overflow: hidden;
  border: 1px solid var(--faq-hair);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  background: var(--ink);
}

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

.page-faq .faq-contact__body h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-contact__body > p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-channels {
  list-style: none;
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--faq-hair);
  border: 1px solid var(--faq-hair);
}

.page-faq .faq-channel {
  display: grid;
  gap: 5px;
  padding: 13px 16px;
  background: rgba(7, 22, 19, 0.82);
  transition: background-color var(--dur) var(--ease);
}

.page-faq .faq-channel:hover {
  background: rgba(23, 63, 53, 0.8);
}

.page-faq .faq-channel__label {
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-channel__value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-channel__value--num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--mint);
}

.page-faq .faq-contact .faq-contact__note {
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-contact .faq-contact__meta {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-contact__meta a {
  color: var(--orange-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 179, 122, 0.42);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-faq .faq-contact__body .btn {
  margin-top: clamp(20px, 2.6vw, 28px);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__frame {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }

  .page-faq .faq-quick__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
    align-items: start;
  }

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

  .page-faq .faq-channel--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

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

  .page-faq .faq-contact__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .page-faq .faq-contact__figure img {
    min-height: 100%;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero__frame {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
  }
}

@media (max-width: 520px) {
  .page-faq details.faq-item summary {
    padding: 14px;
    gap: 12px;
  }

  .page-faq .faq-item__body {
    padding: 0 14px 16px;
  }

  .page-faq .step {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .page-faq .step-num {
    font-size: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-faq .step-num::after,
  .page-faq .faq-group__title::before,
  .page-faq .step-num {
    transform: skewX(-32deg);
  }

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