.page-faq {
  --faq-gap: clamp(16px, 2.4vw, 32px);
  --faq-rule: 1px solid var(--line);
  color: var(--text);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding: clamp(18px, 3vw, 30px) 0 0;
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--line);
}

.page-faq .breadcrumb-list a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .breadcrumb-list a:hover,
.page-faq .breadcrumb-list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  outline: none;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(26px, 4.5vw, 56px) 0 clamp(30px, 4vw, 52px);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-hero-main {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-faq .faq-hero .eyebrow {
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-faq .faq-hero .eyebrow .num {
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(29px, 5.4vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0;
  max-width: 17ch;
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-hero-facts {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--faq-rule);
}

.page-faq .faq-hero-facts li {
  display: grid;
  grid-template-columns: minmax(72px, auto) 1fr;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: var(--faq-rule);
}

.page-faq .fact-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-faq .fact-label {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.5;
}

.page-faq .faq-hero-visual {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq .img-frame--faq {
  position: relative;
  overflow: hidden;
  border: var(--faq-rule);
  background: var(--hull);
  box-shadow: var(--shadow-panel);
}

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

.page-faq .aside-note {
  font-size: 12.5px;
  line-height: 1.62;
  color: var(--muted);
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--line);
}

/* ---------- 路径带 + 分组导航 ---------- */
.page-faq .faq-band {
  padding: clamp(20px, 3vw, 34px) 0;
}

.page-faq .path-rail {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-faq .path-rail li {
  position: relative;
  padding-top: 30px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

.page-faq .path-rail li::before {
  content: "";
  position: absolute;
  top: 13px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--line);
}

.page-faq .path-rail li::after {
  content: "";
  position: absolute;
  top: 8px;
  left: 0;
  width: 11px;
  height: 11px;
  background: var(--ink);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.page-faq .path-num {
  display: block;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan);
  margin-bottom: 4px;
}

.page-faq .group-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: clamp(16px, 2.4vw, 22px) 0;
  border-top: var(--faq-rule);
  border-bottom: var(--faq-rule);
}

.page-faq .group-nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: var(--faq-rule);
  border-radius: var(--radius);
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--muted);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}

.page-faq .group-nav .gnum {
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .group-nav a:hover,
.page-faq .group-nav a:focus-visible {
  color: var(--text);
  border-color: var(--cyan);
  transform: translateX(4px);
  outline: none;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding: clamp(34px, 5vw, 66px) 0;
  border-top: var(--faq-rule);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .group-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .group-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(46px, 11vw, 96px);
  line-height: .76;
  letter-spacing: -0.05em;
  color: var(--panel);
  -webkit-text-stroke: 1px var(--line);
  transition: color .3s var(--ease), -webkit-text-stroke-color .3s var(--ease);
}

.page-faq .group-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.2vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  margin: 0 0 10px;
}

.page-faq .group-desc {
  margin: 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-group:target .group-num {
  color: rgba(0, 229, 255, .1);
  -webkit-text-stroke-color: var(--cyan);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .qa-list {
  display: flex;
  flex-direction: column;
  border-top: var(--faq-rule);
  max-width: 900px;
}

.page-faq .qa {
  border-bottom: var(--faq-rule);
  transition: border-color .25s var(--ease);
}

.page-faq .qa summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  transition: transform .22s var(--ease), color .22s var(--ease);
}

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

.page-faq .qa summary:hover,
.page-faq .qa summary:focus-visible {
  transform: translateX(4px);
  outline: none;
}

.page-faq .qa summary:hover .qa-q,
.page-faq .qa summary:focus-visible .qa-q {
  color: var(--cyan);
}

.page-faq .qa-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 12px;
  padding: 16px 0 6px;
}

.page-faq .qa-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  padding-top: 3px;
}

.page-faq .qa-q {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(15.5px, 1.6vw, 17.5px);
  line-height: 1.55;
  letter-spacing: -0.005em;
  margin: 0;
  color: var(--text);
  transition: color .22s var(--ease);
}

.page-faq .qa-ind {
  font-family: var(--font-num);
  font-size: 17px;
  line-height: 1;
  color: var(--muted);
  justify-self: end;
  padding-top: 3px;
  transition: color .22s var(--ease);
}

.page-faq .qa-ind::before {
  content: "+";
}

.page-faq .qa[open] {
  border-bottom-color: rgba(0, 229, 255, .42);
}

.page-faq .qa[open] .qa-ind {
  color: var(--cyan);
}

.page-faq .qa[open] .qa-ind::before {
  content: "−";
}

.page-faq .qa-body {
  padding: 0 0 20px calc(12px + 34px);
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--muted);
}

.page-faq .qa-body p {
  margin: 0 0 12px;
}

.page-faq .qa-body p:last-of-type {
  margin-bottom: 0;
}

.page-faq .qa-body strong {
  color: var(--text);
  font-weight: 600;
}

.page-faq .qa-steps {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  counter-reset: steps;
  display: grid;
  gap: 10px;
}

.page-faq .qa-steps li {
  position: relative;
  counter-increment: steps;
  padding-left: 34px;
  font-size: 14.5px;
  line-height: 1.75;
}

.page-faq .qa-steps li::before {
  content: counter(steps, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-faq .qa-back {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}

.page-faq .qa-back:hover,
.page-faq .qa-back:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  transform: translateX(4px);
  outline: none;
}

.page-faq .qa-open .qa-q {
  color: var(--text);
}

/* ---------- 环境章节 ---------- */
.page-faq .env-grid {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .env-main {
  display: flex;
  flex-direction: column;
  gap: clamp(18px, 2.4vw, 28px);
}

.page-faq .kv {
  border: var(--faq-rule);
  background: var(--panel);
  box-shadow: var(--shadow-panel);
}

.page-faq .kv-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 12px 16px;
  border-bottom: var(--faq-rule);
  transition: background-color .2s var(--ease);
}

.page-faq .kv-row:last-child {
  border-bottom: 0;
}

.page-faq .kv-row:hover {
  background: rgba(0, 229, 255, .05);
}

.page-faq .kv-key {
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .kv-val {
  font-size: 14px;
  line-height: 1.55;
  color: var(--text);
}

.page-faq .kv-val.is-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-faq .qa-list--tight {
  max-width: none;
}

.page-faq .env-visual {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ---------- 自检清单 ---------- */
.page-faq .faq-group--check {
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(0, 229, 255, .07) 0%, transparent 58%),
    linear-gradient(180deg, rgba(11, 18, 36, .6) 0%, transparent 100%);
}

.page-faq .check-wrap {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  border-top: var(--faq-rule);
}

.page-faq .check-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 14px;
  row-gap: 3px;
  padding: 14px 0;
  border-bottom: var(--faq-rule);
  transition: background-color .2s var(--ease);
}

.page-faq .check-box {
  grid-row: 1 / span 2;
  width: 15px;
  height: 15px;
  margin-top: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--hull);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .check-label {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text);
}

.page-faq .check-note {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
  transition: color .2s var(--ease);
}

.page-faq .check-item:hover .check-box,
.page-faq .check-item:focus-within .check-box {
  border-color: var(--cyan);
  background: rgba(0, 229, 255, .18);
}

.page-faq .check-item:hover .check-label,
.page-faq .check-item:focus-within .check-label {
  color: var(--cyan);
}

.page-faq .contact-card {
  border: var(--faq-rule);
  border-left: 2px solid var(--cyan);
  background: var(--panel);
  box-shadow: var(--shadow-panel);
  padding: clamp(20px, 2.6vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq .contact-eyebrow {
  margin: 0;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .contact-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.4vw, 23px);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-faq .contact-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .contact-mail {
  margin: 0;
  font-family: var(--font-num);
  font-size: 14.5px;
  word-break: break-all;
}

.page-faq .contact-mail a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .35);
  padding-bottom: 2px;
  transition: border-color .2s var(--ease), transform .2s var(--ease);
  display: inline-block;
}

.page-faq .contact-mail a:hover,
.page-faq .contact-mail a:focus-visible {
  border-bottom-color: var(--cyan);
  transform: translateX(4px);
  outline: none;
}

.page-faq .contact-note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.68;
  color: var(--muted);
}

.page-faq .contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 4px 0 0;
}

/* ---------- 尾段 ---------- */
.page-faq .faq-tail {
  border-top: var(--faq-rule);
  padding: clamp(30px, 4vw, 52px) 0 clamp(40px, 5vw, 72px);
}

.page-faq .faq-tail-grid {
  display: grid;
  gap: var(--faq-gap);
  align-items: center;
}

.page-faq .faq-tail-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 27px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  margin: 0 0 10px;
}

.page-faq .faq-tail-text {
  margin: 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-tail-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .kv-row {
    grid-template-columns: minmax(120px, 168px) minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

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

  .page-faq .faq-hero-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 20px;
    border-bottom: var(--faq-rule);
  }

  .page-faq .faq-hero-facts li {
    border-bottom: 0;
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 16px 0;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-faq .path-rail {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .group-head {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: start;
    gap: clamp(16px, 3vw, 40px);
  }

  .page-faq .group-num {
    padding-top: 6px;
  }

  .page-faq .env-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 3.6vw, 56px);
  }

  .page-faq .check-wrap {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 3.6vw, 56px);
  }

  .page-faq .faq-tail-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(24px, 3vw, 48px);
  }

  .page-faq .faq-tail-links {
    justify-content: flex-end;
  }

  .page-faq .qa-body {
    padding-bottom: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}