/* ===================== 使用指南页面 ===================== */
.page-faq {
  --faq-cut: 14px;
  --faq-line: rgba(22, 73, 122, .5);
  --faq-line-strong: rgba(22, 73, 122, .95);
  --faq-glow: rgba(180, 255, 61, .18);
  --faq-pad: clamp(18px, 3.4vw, 30px);
}

/* ---------- 首屏拼贴 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(18px, 3.5vw, 38px) clamp(30px, 5vw, 58px);
  border-bottom: var(--line-soft);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(22, 73, 122, .26) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 73, 122, .26) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: radial-gradient(ellipse at 18% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(ellipse at 18% 0%, #000 0%, transparent 74%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -80px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(255, 106, 26, .18), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7vw, 50px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--c-white);
  margin: 10px 0 16px;
  max-width: 18em;
}

.page-faq .faq-hero__title::after {
  content: "";
  display: block;
  width: 96px;
  height: 4px;
  margin-top: 20px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-pulse));
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* 快速定位面板 */
.page-faq .faq-hero__aside {
  position: relative;
  background: linear-gradient(160deg, rgba(14, 44, 74, .92), rgba(6, 26, 46, .96));
  border: var(--line-soft);
  border-left: 3px solid var(--c-gold);
  padding: var(--faq-pad);
}

.page-faq .faq-hero__aside::before {
  content: "";
  position: absolute;
  right: 14px;
  top: 14px;
  width: 34px;
  height: 1px;
  background: var(--c-gold);
}

.page-faq .faq-hero__aside-title {
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin: 0 0 14px;
}

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

.page-faq .faq-jump a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 8px 10px 0;
  color: var(--c-mist);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid rgba(22, 73, 122, .38);
  transition: color var(--speed) var(--ease), padding-left var(--speed) var(--ease);
}

.page-faq .faq-jump li:last-child a { border-bottom: 0; }

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--c-white);
  padding-left: 6px;
}

.page-faq .faq-jump__k {
  font-size: 12px;
  color: var(--c-orange);
  letter-spacing: .06em;
  flex: none;
}

/* ---------- 通用小节头 ---------- */
.page-faq .section__head .lede { max-width: 62ch; }

/* ---------- 图片容器 ---------- */
.page-faq .faq-figure {
  position: relative;
  margin: 0 0 clamp(26px, 4vw, 44px);
  border: var(--line-soft);
  background: var(--c-abyss-deep);
  overflow: hidden;
}

.page-faq .faq-figure::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 72px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-pulse), transparent);
  z-index: 2;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-faq .faq-figure--qa img { aspect-ratio: 10 / 7; }

.page-faq .faq-figure__cap {
  position: absolute;
  left: 14px;
  bottom: 12px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-mist);
  background: rgba(4, 18, 31, .82);
  border-left: 2px solid var(--c-gold);
  padding: 5px 12px;
}

/* ---------- 六步入门：编号路径 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-step {
  position: relative;
  padding-left: 58px;
  padding-bottom: 14px;
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 62px;
  bottom: -6px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-float), rgba(22, 73, 122, .12));
}

.page-faq .faq-steps > li:last-child .faq-step::before { display: none; }

.page-faq .faq-step__num {
  position: absolute;
  left: 0;
  top: 10px;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(201, 162, 75, .55);
  background: var(--c-abyss);
  color: var(--c-gold);
  font-size: 13px;
  letter-spacing: .04em;
  z-index: 1;
  transition: border-color var(--speed) var(--ease), color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

.page-faq .faq-step > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  list-style: none;
  cursor: pointer;
  padding: 18px var(--faq-pad) 18px 0;
  margin: 0;
  border-top: var(--line-soft);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.6vw, 20px);
  line-height: 1.45;
  color: var(--c-white);
  transition: color var(--speed) var(--ease);
}

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

.page-faq .faq-step > summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--c-mist);
  transition: transform var(--speed) var(--ease), color var(--speed) var(--ease);
}

.page-faq .faq-step[open] > summary::after {
  content: "−";
  color: var(--c-pulse);
}

.page-faq .faq-step[open] .faq-step__num {
  border-color: var(--c-pulse);
  color: var(--c-pulse);
  box-shadow: 0 0 0 5px var(--faq-glow);
}

.page-faq .faq-step[open] > summary { color: var(--c-white); }

.page-faq .faq-step__body {
  padding: 0 var(--faq-pad) 18px 0;
  border-left: 1px solid rgba(201, 162, 75, .28);
  padding-left: 16px;
  margin-left: -30px;
  margin-bottom: 4px;
}

.page-faq .faq-step__act,
.page-faq .faq-step__judge {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-faq .faq-step__act { color: rgba(232, 238, 246, .88); }

.page-faq .faq-step__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  padding: 2px 8px;
  margin-right: 8px;
  border: 1px solid rgba(22, 73, 122, .9);
  color: var(--c-mist);
  background: rgba(14, 44, 74, .6);
  transform: translateY(-1px);
}

.page-faq .faq-step__judge .faq-step__label {
  border-color: rgba(255, 106, 26, .6);
  color: var(--c-orange);
}

/* ---------- 板块与字段说明 ---------- */
.page-faq .faq-fields {
  display: grid;
  gap: 16px;
}

.page-faq .faq-field {
  position: relative;
  padding: var(--faq-pad);
  border-left: 2px solid var(--c-float);
}

.page-faq .faq-field:nth-child(2) { border-left-color: var(--c-orange); }
.page-faq .faq-field:nth-child(3) { border-left-color: var(--c-pulse); }

.page-faq .faq-field__no {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-gold);
  margin: 0 0 10px;
}

.page-faq .faq-field .panel__title {
  margin: 0 0 12px;
  font-size: clamp(18px, 2.8vw, 22px);
  color: var(--c-white);
}

.page-faq .faq-field p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-mist);
}

.page-faq .faq-field p:last-child { margin-bottom: 0; }

/* ---------- 移动端主题带 ---------- */
.page-faq .faq-band {
  position: relative;
  padding-block: clamp(34px, 6vw, 64px);
  background:
    linear-gradient(180deg, rgba(14, 44, 74, .55), rgba(6, 26, 46, .2)),
    repeating-linear-gradient(115deg, rgba(22, 73, 122, .22) 0 1px, transparent 1px 22px);
  border-top: var(--line-soft);
  border-bottom: var(--line-soft);
}

.page-faq .faq-band__grid {
  display: grid;
  gap: 1px;
  background: rgba(22, 73, 122, .45);
  border: var(--line-soft);
}

.page-faq .faq-band__item {
  background: rgba(6, 26, 46, .92);
  padding: var(--faq-pad);
  transition: background var(--speed) var(--ease);
}

.page-faq .faq-band__item:hover { background: rgba(14, 44, 74, .95); }

.page-faq .faq-band__k {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--c-abyss);
  background: var(--c-pulse);
  padding: 3px 9px;
  margin: 0 0 12px;
}

.page-faq .faq-band__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.45;
  color: var(--c-white);
}

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

/* ---------- 导出与复盘 ---------- */
.page-faq .faq-export {
  display: grid;
  gap: 14px;
}

.page-faq .faq-export__card {
  position: relative;
  padding: var(--faq-pad);
  background: linear-gradient(155deg, rgba(14, 44, 74, .9), rgba(6, 26, 46, .95));
  border: var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  transition: transform var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.page-faq .faq-export__card:hover {
  transform: translateY(-4px);
  border-color: rgba(201, 162, 75, .7);
}

.page-faq .faq-export__fmt {
  font-size: clamp(24px, 5vw, 32px);
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--c-orange);
  margin: 0 0 6px;
}

.page-faq .faq-export__card:nth-child(2) .faq-export__fmt { color: var(--c-pulse); }
.page-faq .faq-export__card:nth-child(3) .faq-export__fmt { color: var(--c-gold); }

.page-faq .faq-export__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--c-white);
}

.page-faq .faq-export__card p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-mist);
}

.page-faq .faq-export__notes {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.page-faq .faq-export__note {
  padding: 18px 0 18px 20px;
  border-left: 2px solid var(--c-gold);
  background: linear-gradient(90deg, rgba(201, 162, 75, .07), transparent 70%);
}

.page-faq .faq-export__note h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--c-white);
}

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

/* ---------- 常见问题 ---------- */
.page-faq .faq-qa {
  display: grid;
  gap: 0;
  border-top: var(--line-soft);
}

.page-faq .faq-qa__item {
  border-bottom: 1px solid rgba(22, 73, 122, .55);
  transition: border-color var(--speed) var(--ease);
}

.page-faq .faq-qa__item[open] {
  border-bottom-color: var(--c-pulse);
}

.page-faq .faq-qa__item > summary {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  list-style: none;
  cursor: pointer;
  padding: 16px 34px 16px 0;
}

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

.page-faq .faq-qa__item > summary::before {
  content: "Q";
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-orange);
  flex: none;
  line-height: 1.6;
}

.page-faq .faq-qa__item[open] > summary::before { color: var(--c-pulse); }

.page-faq .faq-qa__item > summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--c-mist);
}

.page-faq .faq-qa__item[open] > summary::after {
  content: "−";
  color: var(--c-pulse);
}

.page-faq .faq-qa__q {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--c-white);
  flex: 1 1 14ch;
}

.page-faq .faq-qa__cat {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-mist);
  border: 1px solid rgba(22, 73, 122, .9);
  padding: 2px 8px;
  flex: none;
}

.page-faq .faq-qa__a {
  padding: 0 34px 18px 26px;
}

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

/* ---------- 联系引导 ---------- */
.page-faq .faq-help__panel {
  display: grid;
  gap: clamp(20px, 3.5vw, 36px);
  padding: clamp(22px, 4vw, 40px);
  border-left: 3px solid var(--c-orange);
}

.page-faq .faq-help__text .section-title { margin-block: 8px 14px; }

.page-faq .faq-help__text p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-mist);
  max-width: 56ch;
}

.page-faq .faq-help__side {
  display: grid;
  gap: 10px;
  align-content: start;
}

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

.page-faq .faq-help__line {
  margin: 0;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--c-white);
  border-bottom: 1px solid rgba(22, 73, 122, .5);
  padding-bottom: 8px;
}

.page-faq .faq-help__tip {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-faq .faq-help__tip a {
  color: var(--c-pulse);
  text-decoration: none;
  border-bottom: 1px solid rgba(180, 255, 61, .45);
}

.page-faq .faq-help__tip a:hover,
.page-faq .faq-help__tip a:focus-visible {
  border-bottom-color: var(--c-pulse);
}

/* ---------- 焦点可见 ---------- */
.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--c-pulse);
  outline-offset: 3px;
}

/* ===================== 平板以上 ===================== */
@media (min-width: 720px) {
  .page-faq .faq-fields {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

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

  .page-faq .faq-export {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-export__notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .page-faq .faq-qa {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
    align-items: start;
  }
}

/* ===================== 桌面 ===================== */
@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(260px, .85fr);
    align-items: end;
    gap: 48px;
  }

  .page-faq .faq-hero__aside {
    margin-bottom: 6px;
  }

  .page-faq .faq-band__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-step {
    padding-left: 72px;
  }

  .page-faq .faq-step::before {
    left: 23px;
    top: 66px;
  }

  .page-faq .faq-step__num {
    width: 48px;
    height: 48px;
    font-size: 14px;
  }

  .page-faq .faq-step__body {
    margin-left: -44px;
    padding-left: 22px;
    padding-right: 60px;
  }

  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1.5fr) minmax(260px, .8fr);
    align-items: start;
  }
}

/* ===================== 降低动效 ===================== */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-export__card:hover {
    transform: none;
  }

  .page-faq .faq-jump a:hover,
  .page-faq .faq-jump a:focus-visible {
    padding-left: 0;
  }
}
</main>