/* ================= 答疑中心 · 页面专属样式 ================= */

.page-faq {
  --faq-rail: 264px;
  --faq-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 顶部标题区 ---------- */
.page-faq .faq-top {
  padding-top: 26px;
  padding-bottom: 10px;
}

.page-faq .faq-top .coord {
  display: inline-block;
  margin-bottom: 16px;
}

.page-faq .faq-top h1 {
  max-width: 20ch;
  margin: 0;
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-faq .faq-top .lede {
  max-width: 58ch;
  margin: 20px 0 0;
  font-size: 17px;
  line-height: 1.78;
  color: var(--rock);
}

/* ---------- 三步路径 ---------- */
.page-faq .faq-quick {
  padding-top: 36px;
  padding-bottom: 14px;
}

.page-faq .faq-quick .section-title {
  margin: 0;
}

.page-faq .faq-quick-grid {
  display: grid;
  gap: 26px;
  align-items: start;
}

.page-faq .step-line {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .step {
  position: relative;
  padding: 18px 18px 18px 68px;
  background: linear-gradient(96deg, rgba(27, 77, 255, 0.16), rgba(14, 35, 64, 0.66) 46%, rgba(14, 35, 64, 0.26));
  border-left: 2px solid rgba(27, 77, 255, 0.55);
  transition: border-color 200ms var(--faq-ease), background 200ms var(--faq-ease);
}

.page-faq .step:hover {
  border-left-color: var(--neon);
  background: linear-gradient(96deg, rgba(27, 77, 255, 0.22), rgba(14, 35, 64, 0.72) 46%, rgba(14, 35, 64, 0.3));
}

.page-faq .step-num {
  position: absolute;
  left: 20px;
  top: 19px;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .step h3 {
  margin: 0 0 5px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-faq .step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--rock);
}

.page-faq .faq-quick-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: rgba(14, 35, 64, 0.46);
}

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

/* ---------- 主布局：左索引 + 右手风琴 ---------- */
.page-faq .faq-body {
  padding-top: 46px;
}

.page-faq .faq-layout {
  display: grid;
  gap: 30px;
  align-items: start;
}

.page-faq .faq-rail {
  padding-top: 16px;
  border-top: 1px solid var(--line-mid);
}

.page-faq .rail-label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-faq .rail-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .rail-list li {
  flex: 0 0 auto;
}

.page-faq .rail-list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  color: var(--rock);
  font-size: 13.5px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms var(--faq-ease), border-color 180ms var(--faq-ease), background 180ms var(--faq-ease);
}

.page-faq .rail-list a:hover,
.page-faq .rail-list a:focus-visible {
  color: var(--bone);
  border-color: var(--blue);
  background: rgba(27, 77, 255, 0.16);
}

.page-faq .rail-num {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--moss);
}

.page-faq .rail-num::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 7px;
  border-radius: 50%;
  background: var(--moss);
  vertical-align: middle;
}

/* ---------- 问答流 ---------- */
.page-faq .faq-stream {
  display: grid;
  gap: 46px;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 26px);
}

.page-faq .group-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-mid);
  font-size: clamp(20px, 2.6vw, 25px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-faq .group-title .coord {
  flex: 0 0 auto;
  font-size: 12px;
}

/* ---------- 手风琴条目 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item h4 {
  margin: 0;
}

.page-faq .faq-item .disclosure-btn {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 19px 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--bone);
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: -0.005em;
  transition: color 180ms var(--faq-ease);
}

.page-faq .faq-item .disclosure-btn:hover {
  color: var(--neon);
}

.page-faq .q-no {
  flex: 0 0 auto;
  min-width: 24px;
  padding-top: 2px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--moss);
}

.page-faq .q-text {
  flex: 1 1 auto;
}

.page-faq .faq-item .disclosure-icon {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  margin-top: 7px;
  margin-left: auto;
  border-right: 2px solid var(--blue);
  border-bottom: 2px solid var(--blue);
  transform: rotate(45deg);
  transition: transform 280ms var(--faq-ease), border-color 280ms var(--faq-ease);
}

.page-faq .faq-item.is-open .disclosure-icon {
  transform: rotate(225deg);
  border-color: var(--neon);
}

.page-faq .faq-item .disclosure-panel {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 320ms var(--faq-ease), opacity 240ms var(--faq-ease);
}

.page-faq .faq-item.is-open .disclosure-panel {
  max-height: 640px;
  opacity: 1;
}

.page-faq .faq-item .disclosure-body {
  padding: 0 0 20px 38px;
}

.page-faq .faq-item .disclosure-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rock);
}

/* ---------- 关键数值高亮 ---------- */
.page-faq .hl {
  font-family: var(--font-num);
  font-weight: 700;
  color: var(--neon);
  text-shadow: 0 0 12px rgba(107, 255, 143, 0.42);
}

/* ---------- 版本与设备配图 ---------- */
.page-faq .faq-device-figure {
  max-width: 720px;
  margin: 26px 0 4px;
  border: 1px solid var(--line);
  background: rgba(14, 35, 64, 0.46);
}

.page-faq .faq-device-figure .figure-caption {
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--rock);
  border-top: 1px solid var(--line);
}

.page-faq .faq-device-figure .figure-caption a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(107, 255, 143, 0.45);
}

.page-faq .faq-device-figure .figure-caption a:hover {
  border-bottom-color: var(--neon);
}

/* ---------- 联系区块 ---------- */
.page-faq .support-block {
  margin-top: 22px;
  padding: 24px 22px 22px;
  background: linear-gradient(140deg, rgba(27, 77, 255, 0.18), rgba(14, 35, 64, 0.74) 52%, rgba(14, 35, 64, 0.4));
  border-left: 3px solid var(--orange);
}

.page-faq .support-lede {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.65;
  color: var(--bone);
}

.page-faq .contact-rows {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-faq .contact-rows li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.7;
}

.page-faq .row-key {
  flex: 0 0 84px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--rock);
}

.page-faq .row-val {
  flex: 1 1 200px;
  color: var(--bone);
  word-break: break-word;
}

.page-faq .support-next {
  margin: 18px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--rock);
}

.page-faq .support-next a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(107, 255, 143, 0.45);
  transition: border-color 180ms var(--faq-ease);
}

.page-faq .support-next a:hover {
  border-bottom-color: var(--neon);
}

/* ---------- 桌面断点 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-quick-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 46px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    padding: 0 0 0 22px;
    border-top: 0;
    border-left: 1px solid var(--line-mid);
  }

  .page-faq .rail-list {
    display: block;
    overflow: visible;
    margin-top: 16px;
    padding-bottom: 0;
  }

  .page-faq .rail-list li + li {
    margin-top: 2px;
  }

  .page-faq .rail-list a {
    display: flex;
    width: 100%;
    padding: 10px 12px;
    border: 0;
    border-left: 2px solid transparent;
    white-space: normal;
    line-height: 1.5;
  }

  .page-faq .rail-list a:hover,
  .page-faq .rail-list a:focus-visible {
    background: rgba(232, 238, 247, 0.07);
    border-left-color: var(--neon);
    color: var(--bone);
  }

  .page-faq .faq-item .disclosure-body {
    padding-left: 40px;
  }
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 480px) {
  .page-faq .step {
    padding: 16px 14px 16px 58px;
  }

  .page-faq .step-num {
    left: 15px;
  }

  .page-faq .faq-item .disclosure-body {
    padding-left: 0;
  }

  .page-faq .support-block {
    padding: 20px 16px 18px;
  }

  .page-faq .row-key {
    flex: 0 0 100%;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .step,
  .page-faq .faq-item .disclosure-btn,
  .page-faq .faq-item .disclosure-icon,
  .page-faq .faq-item .disclosure-panel,
  .page-faq .rail-list a {
    transition: none;
  }
}
<<<END>>>