.page-faq {
  --faq-cut: clamp(28px, 5vw, 60px);
}

.page-faq .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(16px, 3vw, 28px);
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-faq .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  color: var(--mist);
}

.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}

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

.page-faq .breadcrumb li[aria-current] {
  color: var(--white);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 36px) 0 clamp(48px, 8vw, 88px);
  color: var(--white);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(47, 107, 255, 0.28), transparent 58%),
    radial-gradient(80% 70% at 4% 100%, rgba(34, 227, 210, 0.12), transparent 62%),
    linear-gradient(155deg, var(--ink) 0%, var(--ink-3) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), 0 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -10%;
  right: -12%;
  width: 54%;
  height: 130%;
  background: repeating-linear-gradient(96deg, rgba(216, 220, 226, 0.1) 0 1px, transparent 1px 24px);
  transform: skewX(-6deg);
  opacity: 0.55;
  pointer-events: none;
}

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

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  max-width: 16em;
  font-family: var(--f-head);
  font-size: clamp(34px, 6.2vw, 70px);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero .lede {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 38em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: rgba(242, 244, 247, 0.82);
}

.page-faq .hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .hero-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 3px;
  color: var(--cyan);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 227, 210, 0.4);
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease), transform var(--dur-1) var(--ease);
}

.page-faq .hero-links a::after {
  content: "→";
  font-family: var(--f-mono);
}

.page-faq .hero-links a:hover,
.page-faq .hero-links a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
  transform: translate(2px, -2px);
}

.page-faq .hero-facts {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-2);
}

.page-faq .hero-facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 2px;
  border-bottom: 1px solid var(--line);
}

.page-faq .hero-facts .num {
  font-family: var(--f-mono);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--amber);
}

.page-faq .fact-label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  text-align: right;
}

/* ---------- 通用标题区 ---------- */
.page-faq .section-head {
  max-width: 46em;
}

.page-faq .headline {
  margin: 10px 0 0;
  font-family: var(--f-head);
  font-size: clamp(26px, 4.2vw, 46px);
  font-weight: 800;
  line-height: 1.04;
}

.page-faq .section-lede {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 图容器 ---------- */
.page-faq .figure {
  margin: 0;
}

.page-faq .figure-media {
  position: relative;
  overflow: hidden;
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

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

.page-faq .figure-caption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 入口对照 ---------- */
.page-faq .compare {
  padding: clamp(48px, 8vw, 96px) 0;
  color: var(--white);
  background: var(--ink);
}

.page-faq .compare-head {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  align-items: end;
}

.page-faq .version-grid {
  display: grid;
  gap: var(--gap);
  margin-top: clamp(24px, 4vw, 42px);
}

.page-faq .version-card {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 22px 100%, 0 calc(100% - 22px));
  transition: border-color var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);
}

.page-faq .version-card:hover {
  border-color: var(--line-2);
  transform: translate(-2px, -2px);
}

.page-faq .version-card--current {
  border-color: rgba(34, 227, 210, 0.42);
  background:
    linear-gradient(150deg, rgba(34, 227, 210, 0.12), rgba(20, 24, 30, 0.9) 44%),
    var(--ink-2);
}

.page-faq .version-card .tag {
  display: inline-block;
  padding: 4px 9px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
  border: 1px solid var(--line-2);
}

.page-faq .version-card .tag--amber {
  color: var(--amber);
  border-color: rgba(232, 163, 61, 0.55);
}

.page-faq .version-card h3 {
  margin: 12px 0 0;
  font-family: var(--f-head);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.06;
}

.page-faq .v-rows {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
}

.page-faq .v-row {
  position: relative;
  padding: 12px 0 12px 12px;
  border-top: 1px solid var(--line);
}

.page-faq .v-row dt {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-faq .v-row dd {
  margin: 5px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(242, 244, 247, 0.9);
}

.page-faq .v-row.is-diff::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 0;
  width: 2px;
  background: var(--amber);
}

.page-faq .v-row.is-diff dt {
  color: var(--amber);
}

.page-faq .v-row.is-diff dd {
  color: var(--white);
}

/* ---------- 五步自查（浅色阅读区） ---------- */
.page-faq .selfcheck {
  position: relative;
  padding: clamp(48px, 7vw, 88px) 0 clamp(64px, 9vw, 118px);
  color: var(--ink);
  background:
    repeating-linear-gradient(90deg, rgba(11, 13, 16, 0.045) 0 1px, transparent 1px 88px),
    linear-gradient(160deg, #dcdfe4 0%, var(--paper) 46%, #cfd4db 100%);
}

.page-faq .selfcheck .headline {
  color: var(--ink);
}

.page-faq .selfcheck .section-lede {
  color: #47505e;
}

.page-faq .selfcheck .eyebrow {
  color: #8d5b10;
}

.page-faq .selfcheck-head {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  margin-bottom: clamp(28px, 4vw, 54px);
}

.page-faq .selfcheck-figure {
  max-width: 400px;
  justify-self: start;
}

.page-faq .selfcheck-figure .figure-media {
  background: var(--white);
  border-color: rgba(11, 13, 16, 0.16);
}

.page-faq .selfcheck-figure .figure-caption {
  color: #545d6b;
}

.page-faq .steps {
  position: relative;
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .step {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-faq .step-check {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .step-node {
  grid-column: 1;
  grid-row: 1;
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  font-family: var(--f-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  background: var(--white);
  border: 1px solid rgba(11, 13, 16, 0.3);
  cursor: pointer;
  transition: background var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);
}

.page-faq .step-node:hover {
  border-color: var(--blue);
  transform: translate(-2px, -2px);
}

.page-faq .step-check:focus-visible + .step-node {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-faq .step-check:checked + .step-node {
  color: var(--ink);
  background: var(--cyan);
  border-color: #0e9c91;
  box-shadow: 0 0 0 5px rgba(34, 227, 210, 0.24);
}

.page-faq .step-body {
  grid-column: 2;
  min-width: 0;
  transition: opacity var(--dur-2) var(--ease);
}

.page-faq .step-check:checked ~ .step-body {
  opacity: 0.6;
}

.page-faq .step-body h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .step-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #47505e;
}

/* ---------- 问答 ---------- */
.page-faq .qa {
  padding: clamp(52px, 8vw, 100px) 0;
  color: var(--white);
  background: linear-gradient(180deg, var(--ink) 0%, #0d1420 100%);
}

.page-faq .qa-grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  margin-top: clamp(24px, 4vw, 46px);
}

.page-faq .qa-group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--line-2);
}

.page-faq .qa-index {
  font-family: var(--f-serif);
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1;
  color: var(--amber);
}

.page-faq .qa-group-head h3 {
  margin: 0;
  font-family: var(--f-head);
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--white);
}

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

.page-faq .expand-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 0;
  font-family: var(--f-body);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
  text-align: left;
  background: none;
  border: 0;
  cursor: pointer;
  transition: color var(--dur-1) var(--ease);
}

.page-faq .expand-trigger:hover {
  color: var(--cyan);
}

.page-faq .expand-trigger:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.page-faq .expand-sign {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  border: 1px solid var(--line-2);
  border-radius: 50%;
}

.page-faq .expand-sign::before,
.page-faq .expand-sign::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform var(--dur-2) var(--ease), opacity var(--dur-2) var(--ease);
}

.page-faq .expand-sign::before {
  top: 50%;
  left: 4px;
  right: 4px;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .expand-sign::after {
  top: 4px;
  bottom: 4px;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
}

.page-faq .expand-item.is-open .expand-sign::after {
  opacity: 0;
  transform: translateX(-50%) scaleY(0.2);
}

.page-faq .expand-inner {
  padding: 0 34px 18px 0;
}

.page-faq .expand-body {
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(242, 244, 247, 0.72);
}

.page-faq .expand-body p {
  margin: 0;
}

.page-faq .expand-body a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .expand-body a:hover {
  color: var(--white);
}

/* ---------- 收束联系 ---------- */
.page-faq .resolve {
  position: relative;
  overflow: hidden;
  padding: clamp(52px, 8vw, 96px) 0 clamp(60px, 9vw, 110px);
  color: var(--white);
  background: linear-gradient(120deg, var(--ink-3) 0%, var(--ink) 64%);
}

.page-faq .resolve::after {
  content: "";
  position: absolute;
  top: 0;
  right: -6%;
  width: 34%;
  height: 100%;
  background: linear-gradient(180deg, rgba(232, 163, 61, 0.16), transparent 72%);
  transform: skewX(-6deg);
  pointer-events: none;
}

.page-faq .resolve > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .resolve-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-faq .resolve-copy .btn {
  margin-top: clamp(20px, 3vw, 28px);
}

.page-faq .resolve-panel {
  padding: clamp(18px, 3vw, 28px);
  background: rgba(11, 13, 16, 0.55);
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .contact-list {
  margin: 0;
  display: grid;
}

.page-faq .contact-list > div {
  padding: 12px 0;
  border-bottom: 1px solid var(--line-3);
}

.page-faq .contact-list > div:first-child {
  padding-top: 0;
}

.page-faq .contact-list > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .contact-list dt {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-faq .contact-list dd {
  margin: 5px 0 0;
  font-family: var(--f-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

.page-faq .resolve-links {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .resolve-links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 227, 210, 0.35);
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}

.page-faq .resolve-links a:hover,
.page-faq .resolve-links a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 响应式 ---------- */
@media (min-width: 820px) {
  .page-faq .version-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-faq .v-row {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 12px;
    align-items: baseline;
  }

  .page-faq .v-row dd {
    margin: 0;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: end;
  }

  .page-faq .compare-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  }

  .page-faq .selfcheck-head {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-faq .selfcheck-figure {
    justify-self: end;
  }

  .page-faq .steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .steps::before {
    content: "";
    position: absolute;
    top: 26px;
    left: 26px;
    right: 26px;
    height: 2px;
    background: linear-gradient(90deg, var(--blue), var(--cyan) 56%, var(--amber));
    opacity: 0.45;
  }

  .page-faq .step {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .page-faq .step-body {
    grid-column: 1;
    grid-row: 2;
  }

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

@media (min-width: 960px) {
  .page-faq .qa-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .version-card,
  .page-faq .step-node,
  .page-faq .hero-links a,
  .page-faq .expand-sign::before,
  .page-faq .expand-sign::after {
    transition: none;
  }

  .page-faq .version-card:hover,
  .page-faq .step-node:hover,
  .page-faq .hero-links a:hover {
    transform: none;
  }
}