.page-faq {
  --faq-soft-line: rgba(198, 210, 226, 0.3);
  --faq-panel-bg: rgba(13, 19, 34, 0.72);
  background: var(--night);
  color: var(--silver);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq .breadcrumb {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(36px, 6vw, 72px);
  background:
    radial-gradient(680px 400px at 90% 4%, rgba(255, 122, 41, 0.15), transparent 62%),
    radial-gradient(540px 420px at 2% 100%, rgba(168, 95, 58, 0.2), transparent 66%);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.5rem);
  line-height: 1.16;
  letter-spacing: 0.055em;
  color: var(--moon);
  margin: 14px 0 0;
  max-width: 20ch;
}

.page-faq .faq-lede {
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--silver);
  margin: 18px 0 0;
}

.page-faq .faq-hours {
  position: relative;
  padding: 22px 22px 24px;
  background: var(--deep);
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
  overflow: hidden;
}

.page-faq .faq-hours::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 58px;
  height: 2px;
  background: var(--signal);
}

.page-faq .faq-hours-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-hours-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  color: var(--moon);
}

.page-faq .faq-hours-list li .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--grey);
}

.page-faq .faq-hours-note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--grey);
}

.page-faq .faq-hours-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

/* ---------- 阶段条 ---------- */
.page-faq .faq-stage {
  padding: clamp(30px, 5vw, 62px) 0 clamp(44px, 7vw, 88px);
}

.page-faq .faq-stage-title {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 14px;
  margin: 0 0 clamp(20px, 3vw, 34px);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3vw, 1.95rem);
  letter-spacing: 0.06em;
  color: var(--moon);
}

.page-faq .faq-stage-no {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ochre);
  background: rgba(168, 95, 58, 0.18);
  padding: 4px 8px;
}

.page-faq .stage-rail {
  position: relative;
}

.page-faq .stage-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}

.page-faq .stage-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.page-faq .stage-tab {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 4px 10px;
  margin-top: -2px;
  padding: 16px 10px 16px 0;
  border-top: 2px solid var(--line);
  cursor: pointer;
  transition: border-color var(--ease), background var(--ease);
}

.page-faq .stage-tab-key {
  grid-column: 1;
  grid-row: 1;
  width: 11px;
  height: 11px;
  margin-top: 5px;
  border: 1px solid var(--silver);
  background: transparent;
  transition: background var(--ease), border-color var(--ease), box-shadow var(--ease);
}

.page-faq .stage-tab-text {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-display);
  font-size: clamp(0.95rem, 2.6vw, 1.15rem);
  letter-spacing: 0.05em;
  color: var(--silver);
  transition: color var(--ease);
}

.page-faq .stage-tab-no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--grey);
  transition: color var(--ease);
}

.page-faq .stage-tab-hint {
  grid-column: 2;
  grid-row: 2;
  display: none;
  font-size: 12px;
  line-height: 1.6;
  color: var(--grey);
}

.page-faq .stage-tab:hover .stage-tab-key {
  border-color: var(--amber);
}

.page-faq #faq-stage-enter:checked ~ .stage-tabs .stage-tab:nth-child(1),
.page-faq #faq-stage-use:checked ~ .stage-tabs .stage-tab:nth-child(2),
.page-faq #faq-stage-export:checked ~ .stage-tabs .stage-tab:nth-child(3) {
  border-top-color: var(--signal);
}

.page-faq #faq-stage-enter:checked ~ .stage-tabs .stage-tab:nth-child(1) .stage-tab-text,
.page-faq #faq-stage-use:checked ~ .stage-tabs .stage-tab:nth-child(2) .stage-tab-text,
.page-faq #faq-stage-export:checked ~ .stage-tabs .stage-tab:nth-child(3) .stage-tab-text {
  color: var(--moon);
}

.page-faq #faq-stage-enter:checked ~ .stage-tabs .stage-tab:nth-child(1) .stage-tab-key,
.page-faq #faq-stage-use:checked ~ .stage-tabs .stage-tab:nth-child(2) .stage-tab-key,
.page-faq #faq-stage-export:checked ~ .stage-tabs .stage-tab:nth-child(3) .stage-tab-key {
  background: var(--signal);
  border-color: var(--signal);
  box-shadow: 0 0 0 4px rgba(255, 122, 41, 0.18);
}

.page-faq #faq-stage-enter:checked ~ .stage-tabs .stage-tab:nth-child(1) .stage-tab-no,
.page-faq #faq-stage-use:checked ~ .stage-tabs .stage-tab:nth-child(2) .stage-tab-no,
.page-faq #faq-stage-export:checked ~ .stage-tabs .stage-tab:nth-child(3) .stage-tab-no {
  color: var(--signal);
}

.page-faq #faq-stage-enter:focus-visible ~ .stage-tabs .stage-tab:nth-child(1),
.page-faq #faq-stage-use:focus-visible ~ .stage-tabs .stage-tab:nth-child(2),
.page-faq #faq-stage-export:focus-visible ~ .stage-tabs .stage-tab:nth-child(3) {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

/* ---------- 阶段面板 ---------- */
.page-faq .stage-panels {
  padding-top: clamp(26px, 4vw, 46px);
}

.page-faq .stage-panel {
  display: none;
}

.page-faq #faq-stage-enter:checked ~ .stage-panels .stage-panel--enter,
.page-faq #faq-stage-use:checked ~ .stage-panels .stage-panel--use,
.page-faq #faq-stage-export:checked ~ .stage-panels .stage-panel--export {
  display: block;
  animation: faq-rise 240ms cubic-bezier(.4, 0, .2, 1) both;
}

.page-faq .stage-panel-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  letter-spacing: 0.05em;
  color: var(--moon);
  padding-left: 14px;
  border-left: 2px solid var(--ochre);
}

.page-faq .stage-panel-grid {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa-list {
  min-width: 0;
}

.page-faq .qa {
  border-bottom: 1px solid var(--line);
  transition: padding-left var(--ease), border-color var(--ease);
}

.page-faq .qa[open] {
  padding-left: 14px;
  border-left: 1px solid var(--silver);
}

.page-faq .qa-q {
  position: relative;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 18px 40px 18px 0;
  cursor: pointer;
  font-size: 1.02rem;
  line-height: 1.65;
  color: var(--moon);
  list-style: none;
  transition: color var(--ease);
}

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

.page-faq .qa-q::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 17px;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--grey);
  transition: color var(--ease);
}

.page-faq .qa[open] .qa-q::after {
  content: "–";
  color: var(--signal);
}

.page-faq .qa-q:hover {
  color: var(--amber);
}

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

.page-faq .qa-index {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ochre);
}

.page-faq .qa-body {
  padding: 0 4px 22px 0;
  animation: faq-rise 220ms cubic-bezier(.4, 0, .2, 1) both;
}

.page-faq .qa-lead {
  margin: 0 0 16px;
  padding-left: 12px;
  border-left: 2px solid var(--signal);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: var(--moon);
}

.page-faq .qa-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .qa-steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .qa-steps li .mono {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--signal);
  padding-top: 4px;
}

.page-faq .qa-note {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--grey);
}

/* ---------- 图片 ---------- */
.page-faq .stage-figure {
  margin: 0;
}

.page-faq .stage-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
}

.page-faq .stage-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--grey);
}

/* ---------- 导出格式对照 ---------- */
.page-faq .export-compare {
  padding: 22px;
  background: var(--deep);
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
}

.page-faq .export-compare-row {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .export-compare-row:last-of-type {
  border-bottom: none;
}

.page-faq .export-compare-key {
  display: inline-block;
  margin-bottom: 6px;
  padding: 2px 8px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--night);
  background: var(--amber);
}

.page-faq .export-compare-row p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .export-compare-note {
  margin: 6px 0 0;
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--grey);
}

/* ---------- 变更回看 ---------- */
.page-faq .faq-changelog {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(118deg, rgba(168, 95, 58, 0.26), rgba(255, 122, 41, 0.07) 62%, transparent);
}

.page-faq .faq-changelog-inner {
  display: grid;
  gap: 22px;
  padding: clamp(28px, 5vw, 54px) var(--gutter);
  align-items: center;
}

.page-faq .faq-changelog h2 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 1.75rem);
  letter-spacing: 0.055em;
  color: var(--moon);
}

.page-faq .faq-changelog p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-changelog .btn {
  justify-self: start;
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-contact {
  padding: clamp(40px, 6vw, 78px) 0;
}

.page-faq .faq-contact-title {
  margin: 0 0 clamp(22px, 3vw, 36px);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3vw, 1.95rem);
  letter-spacing: 0.06em;
  color: var(--moon);
}

.page-faq .faq-contact-grid {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
}

.page-faq .faq-contact-col h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.05em;
  color: var(--moon);
  padding-left: 12px;
  border-left: 2px solid var(--signal);
}

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

.page-faq .faq-check li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .faq-check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--track);
}

.page-faq .faq-contact-note {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--grey);
}

.page-faq .faq-contact-card {
  padding: 22px;
  background: var(--deep);
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
  position: relative;
}

.page-faq .faq-contact-card::before {
  content: "";
  position: absolute;
  top: 14px;
  right: 16px;
  width: 8px;
  height: 8px;
  background: var(--ok);
  box-shadow: 0 0 0 4px rgba(78, 208, 138, 0.16);
}

.page-faq .faq-contact-label {
  margin: 16px 0 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--grey);
}

.page-faq .faq-contact-mail,
.page-faq .faq-contact-tel {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
  letter-spacing: 0.02em;
  color: var(--moon);
  word-break: break-all;
}

.page-faq .faq-contact-card .faq-hours-list {
  margin: 20px 0 20px;
}

/* ---------- 相关入口 ---------- */
.page-faq .faq-related {
  border-top: 1px solid var(--line);
  background: var(--deep);
}

.page-faq .faq-related-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
  padding-top: clamp(20px, 3vw, 30px);
  padding-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-related-inner a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 3px;
  transition: color var(--ease), border-color var(--ease);
}

.page-faq .faq-related-inner a:hover,
.page-faq .faq-related-inner a:focus-visible {
  color: var(--signal);
  border-color: var(--signal);
}

@keyframes faq-rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 768px) {
  .page-faq .stage-tab {
    padding: 18px 16px 18px 0;
  }

  .page-faq .stage-tab-hint {
    display: block;
  }

  .page-faq .faq-changelog-inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(290px, 1fr);
    align-items: end;
  }

  .page-faq .faq-contact-grid {
    grid-template-columns: 1.05fr 1.15fr 0.85fr;
  }
}

@media (min-width: 1024px) {
  .page-faq .stage-panel-grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(260px, 0.85fr);
    align-items: start;
  }

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

  .page-faq .qa-lead {
    padding-left: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition: none !important;
    animation: none !important;
  }
}