.page-faq {
  --faq-rail-w: 208px;
  --faq-col-gap: 56px;
  background: var(--void);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-faq .breadcrumbs {
  margin: 0 0 28px;
  font-size: 13px;
}

.page-faq .breadcrumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.page-faq .breadcrumbs li {
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-faq .breadcrumbs li + li::before {
  content: "/";
  color: var(--line-strong);
}

.page-faq .breadcrumbs a {
  color: var(--text-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-head {
  position: relative;
  overflow: hidden;
  padding: 88px 0 56px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(158deg, rgba(42, 19, 80, 0.92) 0%, rgba(7, 11, 31, 1) 60%),
    var(--void);
}

.page-faq .faq-head::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(168, 179, 196, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 179, 196, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
}

.page-faq .faq-head .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-head__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-faq .faq-head__kicker {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--neon);
  font-family: var(--font-mono);
}

.page-faq .faq-head__title {
  margin: 0 0 24px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7vw, 72px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-head__lede {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-soft);
}

.page-faq .faq-head__aside {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  line-height: 2;
  color: var(--text-dim);
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

/* ---------- 首屏数据条 ---------- */

.page-faq .faq-head__stats {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-head__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(14, 22, 51, 0.78);
}

.page-faq .faq-head__stat-label {
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 快速索引 ---------- */

.page-faq .faq-map {
  padding: 72px 0 80px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-map__title {
  margin: 0 0 32px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-map__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-faq .faq-map__card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px;
  border: 1px solid var(--line);
  background: rgba(14, 22, 51, 0.55);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-faq .faq-map__card:hover,
.page-faq .faq-map__card:focus-visible {
  border-color: var(--neon);
  background: rgba(14, 22, 51, 0.92);
  transform: translateY(-2px);
}

.page-faq .faq-map__no {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--silver);
}

.page-faq .faq-map__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-map__desc {
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-faq .faq-map__go {
  margin-top: 6px;
  font-size: 13px;
  color: var(--neon);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  border-bottom: 1px solid transparent;
  align-self: flex-start;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-faq .faq-map__card:hover .faq-map__go,
.page-faq .faq-map__card:focus-visible .faq-map__go {
  border-bottom-color: var(--neon);
  transform: translateX(4px);
}

/* ---------- 主体双栏 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-top: 64px;
  padding-bottom: 96px;
}

/* ---------- 阶段索引竖栏 ---------- */

.page-faq .faq-rail {
  border-top: 2px solid var(--neon);
  padding-top: 14px;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
}

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

.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-faq .faq-rail__list a .num {
  color: var(--silver);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--neon);
  border-color: var(--neon);
  background: rgba(70, 245, 163, 0.06);
}

/* ---------- 章节 ---------- */

.page-faq .faq-stage {
  padding-bottom: 60px;
  scroll-margin-top: 96px;
}

.page-faq .faq-stage + .faq-stage {
  border-top: 1px solid var(--line);
  padding-top: 56px;
}

.page-faq .faq-stage:last-child {
  padding-bottom: 0;
}

.page-faq .faq-stage__head {
  display: grid;
  gap: 12px;
  margin-bottom: 28px;
}

.page-faq .faq-stage__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 4vw, 36px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-stage__intro {
  margin: 0;
  max-width: 42ch;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-soft);
}

/* ---------- 客户端网格 ---------- */

.page-faq .faq-clients {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-clients li {
  background: var(--void);
  padding: 20px;
  display: grid;
  gap: 8px;
}

.page-faq .faq-clients__os {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--neon);
}

.page-faq .faq-clients li p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 图 ---------- */

.page-faq .faq-figure {
  margin: 0 0 28px;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(42, 19, 80, 0.6), rgba(7, 11, 31, 0.9));
  overflow: hidden;
}

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

/* ---------- 步骤列表 ---------- */

.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-soft);
}

.page-faq .faq-steps li strong {
  color: var(--text);
  font-weight: 700;
}

.page-faq .faq-steps__no {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--neon);
  padding-top: 4px;
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-item {
  border: 1px solid var(--line);
  background: rgba(14, 22, 51, 0.5);
  margin-bottom: 10px;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: rgba(70, 245, 163, 0.45);
  background: var(--panel);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  transition: color 0.25s var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--silver);
  transition: color 0.25s var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2013";
  color: var(--neon);
}

.page-faq .faq-item__q:hover {
  color: var(--neon);
}

.page-faq .faq-item__no {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--silver);
  flex: 0 0 auto;
}

.page-faq .faq-item__a {
  border-left: 2px solid var(--pulse);
  margin: 0 20px 20px 20px;
  padding: 2px 0 0 16px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-soft);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

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

/* ---------- 收藏结构示意 ---------- */

.page-faq .faq-meter {
  display: block;
  width: 100%;
  max-width: 560px;
  height: auto;
  margin: 0 0 14px;
}

.page-faq .faq-meter__label {
  font-family: var(--font-body);
  font-size: 13px;
  fill: var(--silver);
}

.page-faq .faq-meter__track {
  fill: rgba(168, 179, 196, 0.12);
}

.page-faq .faq-meter__fill--neon {
  fill: var(--neon);
  opacity: 0.85;
}

.page-faq .faq-meter__fill--violet {
  fill: var(--violet-b);
  opacity: 0.95;
}

.page-faq .faq-meter__fill--pulse {
  fill: var(--pulse);
  opacity: 0.9;
}

.page-faq .faq-meter__legend {
  list-style: none;
  margin: 0 0 30px;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 13px;
  color: var(--text-soft);
}

.page-faq .faq-meter__legend b {
  color: var(--neon);
  margin-right: 4px;
}

/* ---------- 档位切换 ---------- */

.page-faq .faq-tariff {
  position: relative;
  margin: 0 0 30px;
}

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

.page-faq .faq-tariff__tabs {
  display: flex;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-tariff__tabs label {
  flex: 1 1 0;
  min-width: 0;
  text-align: center;
  padding: 12px 8px;
  background: rgba(14, 22, 51, 0.8);
  color: var(--text-soft);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .faq-tariff__tabs label:hover {
  color: var(--neon);
}

.page-faq .faq-tariff__panels {
  border: 1px solid var(--line);
  border-top: none;
  background: var(--panel);
}

.page-faq .faq-tariff__panel {
  display: none;
  padding: 20px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-soft);
}

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

.page-faq #faq-tariff-capacity:checked ~ .faq-tariff__tabs label[for="faq-tariff-capacity"],
.page-faq #faq-tariff-sync:checked ~ .faq-tariff__tabs label[for="faq-tariff-sync"],
.page-faq #faq-tariff-export:checked ~ .faq-tariff__tabs label[for="faq-tariff-export"] {
  background: var(--neon);
  color: var(--void);
  font-weight: 600;
}

.page-faq #faq-tariff-capacity:checked ~ .faq-tariff__panels .faq-tariff__panel[data-tier="capacity"],
.page-faq #faq-tariff-sync:checked ~ .faq-tariff__panels .faq-tariff__panel[data-tier="sync"],
.page-faq #faq-tariff-export:checked ~ .faq-tariff__panels .faq-tariff__panel[data-tier="export"] {
  display: block;
}

/* ---------- 联系方式 ---------- */

.page-faq .faq-contact {
  border: 1px solid var(--line);
  background: rgba(14, 22, 51, 0.6);
  padding: 8px 0 0;
  margin-bottom: 30px;
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 4px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-contact__key {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--silver);
  font-family: var(--font-mono);
}

.page-faq .faq-contact__val {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: 0;
  padding: 14px 20px 18px;
  font-size: 13px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 提供信息清单 ---------- */

.page-faq .faq-brief {
  margin-bottom: 30px;
}

.page-faq .faq-brief__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-brief__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-brief__list li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-faq .faq-brief__list li .num {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--pulse);
  padding-top: 3px;
}

/* ---------- CTA 与相关页面 ---------- */

.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.page-faq .faq-related {
  margin: 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--text-dim);
}

.page-faq .faq-related a {
  color: var(--text-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), padding 0.25s var(--ease);
}

.page-faq .faq-related a:hover,
.page-faq .faq-related a:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
  padding-left: 4px;
}

/* ---------- 窄屏微调 ---------- */

@media (max-width: 480px) {
  .page-faq .faq-head {
    padding: 64px 0 44px;
  }

  .page-faq .faq-head__stats li {
    padding: 14px 14px;
  }

  .page-faq .faq-item__q {
    gap: 10px;
    padding: 14px 16px;
  }

  .page-faq .faq-item__a {
    margin: 0 16px 16px 16px;
    padding-left: 12px;
  }

  .page-faq .faq-steps li,
  .page-faq .faq-brief__list li {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 10px;
  }
}

/* ---------- 桌面端 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-head__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-faq .faq-meter__legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-contact__row {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-head__grid {
    grid-template-columns: minmax(0, 1fr) 268px;
    gap: 48px;
    align-items: end;
  }

  .page-faq .faq-head__aside {
    border-top: none;
    border-left: 1px solid var(--line);
    padding-top: 0;
    padding-left: 22px;
  }

  .page-faq .faq-map__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: var(--faq-col-gap);
    padding-top: 80px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h-solid) + 28px);
    align-self: start;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__list li {
    flex: 1 1 auto;
    border-bottom: 1px solid var(--line);
  }

  .page-faq .faq-rail__list li:first-child {
    border-top: 1px solid var(--line);
  }

  .page-faq .faq-rail__list a {
    border: none;
    border-left: 2px solid transparent;
    padding: 11px 0 11px 12px;
    white-space: normal;
    font-size: 13.5px;
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    border-left-color: var(--neon);
    background: transparent;
    padding-left: 16px;
  }

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

  .page-faq .faq-stage__intro {
    max-width: 52ch;
  }

  .page-faq .faq-figure {
    margin-bottom: 34px;
  }
}