.page-faq {
  --faq-rail: 224px;
  --faq-gap: clamp(44px, 7vw, 92px);
  overflow-x: clip;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding: clamp(20px, 3vw, 34px) 0 clamp(36px, 5vw, 62px);
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--slate-400);
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-700);
}

.page-faq .breadcrumb a {
  color: var(--slate-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .breadcrumb a:hover {
  color: var(--mint-400);
  border-bottom-color: var(--mint-400);
}

.page-faq .breadcrumb__item[aria-current="page"] {
  color: var(--slate-100);
}

.page-faq .faq-frame {
  position: relative;
  border: 1px solid var(--line-700);
  border-radius: var(--radius-lg);
  padding: clamp(26px, 4.4vw, 64px);
  background:
    radial-gradient(120% 90% at 86% 2%, rgba(22, 115, 255, 0.2), transparent 62%),
    linear-gradient(158deg, rgba(18, 41, 74, 0.94) 0%, rgba(6, 16, 32, 0.9) 100%);
  overflow: hidden;
}

.page-faq .faq-frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 10px;
  background-image: repeating-linear-gradient(90deg, var(--line-700) 0 1px, transparent 1px 28px);
  pointer-events: none;
}

.page-faq .faq-frame::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -100px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 224, 196, 0.16), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-frame__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--slate-400);
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-faq .faq-frame__code {
  color: var(--mint-400);
}

.page-faq .faq-frame h1 {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: clamp(2rem, 5.4vw, 3.75rem);
  line-height: 1.14;
  color: var(--slate-100);
  margin: 0;
  max-width: 18em;
}

.page-faq .faq-frame__lead {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 34em;
  font-size: var(--fs-18);
  line-height: 1.8;
  color: var(--slate-400);
}

.page-faq .faq-frame__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 36px);
}

.page-faq .faq-frame__stamp {
  position: absolute;
  right: clamp(20px, 3.4vw, 44px);
  bottom: clamp(16px, 2.4vw, 30px);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--slate-400);
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-body {
  padding-bottom: clamp(48px, 7vw, 96px);
}

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

.page-faq .faq-rail__title {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--slate-400);
  margin: 0 0 14px;
}

.page-faq .faq-rail .anchor-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0 0 clamp(28px, 4vw, 44px);
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail .anchor-rail__link {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--slate-400);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.page-faq .faq-rail .anchor-rail__link:hover,
.page-faq .faq-rail .anchor-rail__link[aria-current="true"] {
  color: var(--mint-400);
}

/* ---------- 区块通用 ---------- */
.page-faq .faq-section {
  padding-top: clamp(30px, 4vw, 46px);
  margin-bottom: var(--faq-gap);
  border-top: 1px solid var(--line-700);
}

.page-faq .faq-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-section__head h2 {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  line-height: 1.24;
  color: var(--slate-100);
  margin: 12px 0 0;
}

.page-faq .faq-section__lead {
  margin: 16px 0 0;
  max-width: 34em;
  color: var(--slate-400);
  line-height: 1.8;
}

/* ---------- 场景归类 ---------- */
.page-faq .faq-scene {
  display: grid;
  gap: clamp(24px, 3vw, 34px);
  margin-top: clamp(24px, 3vw, 36px);
}

.page-faq .faq-scene__list {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.page-faq .faq-scene__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 16px 18px;
  border: 1px solid var(--line-700);
  border-radius: var(--radius-md);
  background: rgba(18, 41, 74, 0.4);
  text-decoration: none;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-scene__item:hover,
.page-faq .faq-scene__item:focus-visible {
  border-color: rgba(47, 224, 196, 0.45);
  background: rgba(18, 41, 74, 0.72);
}

.page-faq .faq-scene__no {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  line-height: 1;
  color: var(--brand-500);
  letter-spacing: -0.02em;
}

.page-faq .faq-scene__item:hover .faq-scene__no {
  color: var(--mint-400);
}

.page-faq .faq-scene__body {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.page-faq .faq-scene__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-18);
  color: var(--slate-100);
  overflow-wrap: anywhere;
}

.page-faq .faq-scene__desc {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--slate-400);
}

.page-faq .faq-scene__go {
  font-family: var(--font-mono);
  color: var(--brand-300);
  font-size: var(--fs-18);
}

.page-faq .faq-scene__media img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  border-radius: var(--radius-md);
}

.page-faq .faq-scene__media .media-frame {
  border: 1px solid var(--line-700);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: linear-gradient(150deg, rgba(18, 41, 74, 0.85), rgba(6, 16, 32, 0.9));
}

/* ---------- 四步检索 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(26px, 3.6vw, 40px);
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.6vw, 28px);
  align-items: start;
}

.page-faq .faq-step__no {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.75rem, 7vw, 5rem);
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: var(--brand-500);
}

.page-faq .faq-step__body {
  position: relative;
  padding-left: clamp(16px, 2.4vw, 26px);
  padding-bottom: 4px;
  border-left: 1px solid var(--line-700);
  min-width: 0;
}

.page-faq .faq-step__body::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mint-400);
  box-shadow: 0 0 0 4px rgba(47, 224, 196, 0.14);
}

.page-faq .faq-step__body h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-22);
  color: var(--slate-100);
  margin: 0 0 8px;
}

.page-faq .faq-step__body p {
  margin: 0 0 8px;
  color: var(--slate-400);
  line-height: 1.8;
  max-width: 34em;
}

.page-faq .faq-step__note {
  font-size: var(--fs-14);
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
  color: var(--brand-300);
  border-left: 0;
  padding-left: 0;
}

/* ---------- 分段切换 ---------- */
.page-faq .faq-seg {
  margin-top: clamp(24px, 3vw, 36px);
}

.page-faq .faq-seg__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--line-700);
  border-radius: 999px;
  background: rgba(18, 41, 74, 0.5);
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-seg__btn {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.02em;
  padding: 9px 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--slate-400);
  cursor: pointer;
  transition: color 0.18s var(--ease), background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-seg__btn:hover {
  color: var(--slate-100);
}

.page-faq .faq-seg__btn[aria-selected="true"] {
  color: var(--mint-400);
  background: rgba(47, 224, 196, 0.1);
  border-color: rgba(47, 224, 196, 0.35);
}

.page-faq .faq-seg__btn:focus-visible {
  outline: 2px solid var(--mint-400);
  outline-offset: 2px;
}

.page-faq .faq-seg__panel[hidden] {
  display: none;
}

.page-faq .faq-media {
  margin-bottom: clamp(20px, 3vw, 28px);
}

.page-faq .faq-media .media-frame {
  border: 1px solid var(--line-700);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: linear-gradient(150deg, rgba(18, 41, 74, 0.8), rgba(6, 16, 32, 0.9));
}

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

/* ---------- 折叠问答 ---------- */
.page-faq .faq-q {
  border: 1px solid var(--line-700);
  border-radius: var(--radius-md);
  background: rgba(18, 41, 74, 0.4);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-q[open] {
  background: rgba(18, 41, 74, 0.74);
  border-color: rgba(47, 224, 196, 0.3);
}

.page-faq .faq-q__ask {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--slate-100);
  line-height: 1.7;
}

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

.page-faq .faq-q__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--brand-300);
}

.page-faq .faq-q[open] .faq-q__idx {
  color: var(--mint-400);
}

.page-faq .faq-q__text {
  min-width: 0;
  overflow-wrap: anywhere;
}

.page-faq .faq-q__ans {
  padding: 0 18px 18px;
}

.page-faq .faq-q__steps {
  counter-reset: qs;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-q__steps li {
  counter-increment: qs;
  position: relative;
  padding-left: 32px;
  margin-bottom: 8px;
  color: var(--slate-400);
  line-height: 1.8;
}

.page-faq .faq-q__steps li:last-child {
  margin-bottom: 0;
}

.page-faq .faq-q__steps li::before {
  content: counter(qs, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--brand-300);
}

/* ---------- 记录字段 ---------- */
.page-faq .faq-form {
  display: grid;
  gap: 10px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-faq .faq-field {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  border: 1px solid var(--line-700);
  border-radius: var(--radius-sm);
  background: rgba(6, 16, 32, 0.56);
  border-left: 3px solid var(--brand-600);
}

.page-faq .faq-field__label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--brand-300);
}

.page-faq .faq-field__value {
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--slate-100);
  overflow-wrap: anywhere;
}

.page-faq .faq-notice {
  margin-top: 18px;
}

.page-faq .faq-notice p {
  margin: 0;
  color: var(--slate-400);
  line-height: 1.8;
}

/* ---------- 提交条件 ---------- */
.page-faq .faq-cond {
  list-style: none;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-cond__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 18px;
  border-left: 2px solid var(--line-700);
}

.page-faq .faq-cond__no {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--brand-500);
  letter-spacing: 0.04em;
}

.page-faq .faq-cond__item h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-18);
  color: var(--slate-100);
  margin: 0 0 6px;
}

.page-faq .faq-cond__item p {
  margin: 0;
  color: var(--slate-400);
  line-height: 1.8;
  max-width: 34em;
}

.page-faq .faq-mail {
  margin-top: clamp(26px, 3.4vw, 40px);
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line-700);
  border-radius: var(--radius-md);
  background: linear-gradient(150deg, rgba(14, 90, 214, 0.18), rgba(6, 16, 32, 0.7));
}

.page-faq .faq-mail__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-18);
  color: var(--slate-100);
  margin: 0 0 10px;
}

.page-faq .faq-mail__body {
  margin: 0 0 14px;
  color: var(--slate-400);
  line-height: 1.8;
  max-width: 34em;
}

.page-faq .faq-mail__meta {
  margin: 0 0 12px;
  color: var(--mint-400);
}

.page-faq .faq-mail__note {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--slate-400);
  max-width: 34em;
}

/* ---------- 处理范围 ---------- */
.page-faq .faq-scope {
  list-style: none;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-scope li {
  position: relative;
  padding-left: 26px;
  color: var(--slate-400);
  line-height: 1.8;
  max-width: 34em;
}

.page-faq .faq-scope li::before {
  content: "×";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  color: var(--amber-400);
}

.page-faq .faq-warn {
  margin-top: 20px;
}

.page-faq .faq-warn p {
  margin: 0;
  color: var(--slate-100);
  line-height: 1.8;
}

.page-faq .faq-scope__more {
  margin: 22px 0 0;
  color: var(--slate-400);
  line-height: 1.8;
  max-width: 34em;
}

.page-faq .faq-end {
  margin: 0;
  color: var(--slate-400);
}

.page-faq .faq-end a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .faq-end a:hover {
  border-bottom-color: var(--mint-400);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-form {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-field:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-scene {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    align-items: start;
  }

  .page-faq .faq-scene__media {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    display: grid;
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-rail .anchor-rail__list {
    display: grid;
    gap: 10px;
  }

  .page-faq .faq-rail .anchor-rail__link {
    display: block;
    padding-left: 12px;
    border-left: 2px solid var(--line-700);
  }

  .page-faq .faq-rail .anchor-rail__link:hover,
  .page-faq .faq-rail .anchor-rail__link[aria-current="true"] {
    border-left-color: var(--mint-400);
  }
}

@media (max-width: 719px) {
  .page-faq .faq-frame__stamp {
    position: static;
    display: block;
    margin-top: 24px;
  }

  .page-faq .faq-frame__actions .btn {
    flex: 1 1 auto;
    justify-content: center;
  }

  .page-faq .faq-cond__item {
    padding: 14px 12px;
    gap: 12px;
  }
}

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