.page-faq {
  --faq-gap: 22px;
  position: relative;
  padding-bottom: 88px;
  color: var(--white);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 30px 0 8px;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -10% -6% 0 -6%;
  background:
    repeating-linear-gradient(84deg, transparent 0 46px, rgba(31, 58, 53, .55) 46px 47px);
  pointer-events: none;
  z-index: 0;
}

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

.page-faq .faq-hero__kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .faq-hero__title {
  margin: 0 0 16px;
  font-size: clamp(30px, 6vw, 58px);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -.01em;
  max-width: 17em;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--white);
  opacity: .84;
}

.page-faq .faq-hero__band {
  margin-top: 30px;
}

/* ---------- 主体：左导轨 + 右面板 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-top: 44px;
}

/* ---------- 分类导轨 ---------- */
.page-faq .faq-rail {
  border-top: 2px solid var(--cyan);
  padding-top: 16px;
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist);
  text-transform: uppercase;
}

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

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: 26px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 11px 8px 11px 10px;
  border-left: 2px solid var(--line);
  color: var(--white);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-left-color: var(--cyan);
  background-color: var(--panel);
}

.page-faq .faq-rail__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-rail__num {
  font-size: 12px;
  color: var(--mist);
}

.page-faq .faq-rail__dot {
  width: 8px;
  height: 8px;
  display: block;
  border-radius: 50%;
}

.page-faq .faq-rail__dot--ok {
  background: var(--cyan);
  animation: faq-pulse 1.6s ease-in-out infinite;
}

.page-faq .faq-rail__dot--warn {
  background: var(--yellow);
  animation: faq-pulse 1.6s ease-in-out infinite;
}

.page-faq .faq-rail__foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

@keyframes faq-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .3; }
}

/* ---------- 筛选 ---------- */
.page-faq .faq-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.page-faq .faq-filters .tag {
  cursor: pointer;
  border: 1px solid var(--line);
  background: transparent;
  font-family: var(--font-mono);
}

.page-faq .faq-filters .tag.is-active {
  border-color: var(--cyan);
  background: rgba(41, 242, 192, .12);
}

.page-faq .faq-filters .tag--yellow.is-active {
  border-color: var(--yellow);
  background: rgba(255, 212, 59, .14);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding: 26px 0 8px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 24px;
}

.page-faq .faq-group:first-of-type {
  border-top-color: var(--cyan);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  margin-bottom: 18px;
}

.page-faq .faq-group__num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-group__intro {
  flex: 1 1 240px;
  min-width: 0;
}

.page-faq .faq-group__title {
  margin: 0 0 8px;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.3;
  font-weight: 800;
}

.page-faq .faq-group__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 42em;
}

.page-faq .faq-group__tag {
  margin-left: auto;
}

.page-faq .faq-group__body {
  display: grid;
  gap: 10px;
}

/* ---------- 问答面板块 ---------- */
.page-faq .qa {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: var(--radius);
  transition: border-color .18s var(--ease);
}

.page-faq .qa[open] {
  border-color: rgba(41, 242, 192, .45);
}

.page-faq .qa:hover {
  border-color: rgba(41, 242, 192, .3);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--white);
}

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

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
}

.page-faq .qa[open] .qa__q::after {
  content: "\2013";
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa__idx {
  font-size: 12px;
  color: var(--mist);
  flex: 0 0 auto;
}

.page-faq .qa__a {
  padding: 0 18px 18px 46px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--white);
  opacity: .84;
}

.page-faq .qa__a p {
  margin: 0;
}

/* ---------- 小标题 ---------- */
.page-faq .faq-subhead {
  margin: 22px 0 4px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--yellow);
}

/* ---------- 三步排查 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.page-faq .faq-steps__item {
  position: relative;
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-steps__item:not(:first-child)::before {
  content: "";
  position: absolute;
  left: 20px;
  top: -14px;
  width: 1px;
  height: 14px;
  background: var(--line);
}

.page-faq .faq-steps__num {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--cyan);
  font-size: 15px;
  font-weight: 700;
}

.page-faq .faq-steps__item p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--white);
  opacity: .84;
}

/* ---------- 加载时间对比 ---------- */
.page-faq .net-compare {
  display: grid;
  gap: 12px;
  margin: 6px 0 18px;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-faq .net-compare__row {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr) 54px;
  gap: 12px;
  align-items: center;
}

.page-faq .net-compare__label {
  font-size: 12px;
  color: var(--mist);
}

.page-faq .net-compare__track {
  display: block;
  height: 12px;
  background: var(--bg);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .net-compare__bar {
  display: block;
  height: 100%;
}

.page-faq .net-compare__bar--before {
  width: 100%;
  background: var(--mist);
}

.page-faq .net-compare__bar--now {
  width: 35%;
  background: var(--cyan);
}

.page-faq .net-compare__val {
  font-size: 13px;
  font-weight: 700;
  text-align: right;
  color: var(--white);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 4px 0 18px;
}

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

/* ---------- 行内链接 ---------- */
.page-faq .faq-inline-link {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

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

.page-faq .faq-inline-link a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact {
  padding: 22px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
}

.page-faq .faq-contact__lede {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--white);
  opacity: .86;
}

.page-faq .faq-contact__mail {
  margin: 0 0 18px;
  font-size: 16px;
  font-weight: 700;
  color: var(--cyan);
  word-break: break-all;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.page-faq .faq-contact .messenger {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--yellow);
}

/* ---------- 中屏：双栏 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-body {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-hero {
    padding-top: 44px;
  }

  .page-faq .qa__a {
    padding-left: 56px;
  }
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 560px) {
  .page-faq {
    padding-bottom: 64px;
  }

  .page-faq .faq-group__tag {
    margin-left: 0;
  }

  .page-faq .qa__a {
    padding: 0 16px 16px 16px;
  }

  .page-faq .net-compare {
    padding: 14px;
  }

  .page-faq .net-compare__row {
    grid-template-columns: 52px minmax(0, 1fr) 48px;
    gap: 8px;
  }

  .page-faq .faq-contact__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .page-faq .faq-contact__actions .btn {
    text-align: center;
  }

  .page-faq .qa__q {
    padding: 14px 14px;
    font-size: 15px;
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__dot--ok,
  .page-faq .faq-rail__dot--warn {
    animation: none;
  }

  .page-faq .faq-rail__link,
  .page-faq .qa {
    transition: none;
  }
}