.page-faq {
  display: block;
  color: var(--white);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq .shell {
  width: 100%;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 32px 0 48px;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -100px;
  width: 440px;
  height: 440px;
  background: radial-gradient(circle, rgba(43, 231, 224, 0.17), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 38%;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent);
  pointer-events: none;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 16px;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 20px;
  max-width: 21ch;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 54px);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-faq .faq-hero-lead {
  margin: 0 0 28px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-jump .btn {
  text-decoration: none;
}

/* ---------- 区块头 ---------- */

.page-faq .section-head {
  margin-bottom: 28px;
}

.page-faq .section-title {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: 0.01em;
}

/* ---------- 三步上手 ---------- */

.page-faq .faq-steps-figure {
  margin: 0 0 32px;
}

.page-faq .faq-step-list {
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  position: relative;
  padding: 24px 22px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel-top), var(--panel-btm));
}

.page-faq .faq-step-num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-faq .faq-step-title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  color: var(--white);
}

.page-faq .faq-step p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-step-tip {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
}

/* ---------- 配置自查 ---------- */

.page-faq .faq-spec-layout {
  display: grid;
  gap: 28px;
}

.page-faq .faq-spec-figure {
  margin: 0;
}

.page-faq .faq-tier-bar {
  margin-bottom: 18px;
}

.page-faq .faq-tier-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.page-faq .faq-tier {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--tier-color, var(--cyan));
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(19, 26, 69, 0.92), rgba(13, 19, 52, 0.92));
}

.page-faq .faq-tier[data-tier="light"] { --tier-color: var(--ok); }
.page-faq .faq-tier[data-tier="standard"] { --tier-color: var(--cyan); }
.page-faq .faq-tier[data-tier="high"] { --tier-color: var(--magenta); }

.page-faq .faq-tier-name {
  margin: 12px 0 6px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 800;
  color: var(--white);
}

.page-faq .faq-tier-spec {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--tier-color, var(--cyan));
}

.page-faq .faq-tier p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-spec-facts {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 18px 18px 18px 20px;
  list-style: none;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius);
  background: rgba(10, 16, 48, 0.6);
}

.page-faq .faq-spec-facts li {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-spec-facts .mono {
  min-width: 92px;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.04em;
}

/* ---------- 问答双栏 ---------- */

.page-faq .faq-answers-layout {
  display: grid;
  gap: 28px;
}

.page-faq .faq-side-inner {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(19, 26, 69, 0.72);
}

.page-faq .faq-side-title {
  margin: 12px 0 16px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  color: var(--white);
}

.page-faq .faq-cats {
  display: block;
}

.page-faq .faq-cats .filter-set {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-faq .faq-cats .filter-btn {
  width: 100%;
  text-align: left;
  justify-content: flex-start;
}

.page-faq .faq-side-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-list {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .faq-count-line {
  margin: 0 0 4px;
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--muted);
}

.page-faq .faq-count-line .mono {
  color: var(--cyan);
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-left: 3px solid var(--q-color, var(--cyan));
  border-radius: var(--radius);
  background: rgba(19, 26, 69, 0.62);
  transition: background 200ms var(--ease), border-color 200ms var(--ease);
}

.page-faq .faq-item[data-cat="login"] { --q-color: var(--cyan); }
.page-faq .faq-item[data-cat="download"] { --q-color: var(--gold); }
.page-faq .faq-item[data-cat="config"] { --q-color: var(--ok); }
.page-faq .faq-item[data-cat="server"] { --q-color: var(--magenta); }

.page-faq .faq-item[open] {
  background: rgba(19, 26, 69, 0.92);
  border-color: var(--line-cyan);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--white);
}

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

.page-faq .faq-item > summary::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 9px;
  background: var(--q-color, var(--cyan));
}

.page-faq .faq-item > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--gold);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
}

.page-faq .faq-answer {
  padding: 0 20px 20px 40px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .filter-empty {
  margin: 0;
  padding: 20px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--muted);
}

/* ---------- 兜底支持 ---------- */

.page-faq .faq-support-card {
  display: grid;
  gap: 28px;
  padding: 28px 22px 30px;
  border: 1px solid var(--line-cyan);
}

.page-faq .faq-support-lead {
  margin: 0 0 24px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-support-paths {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-support-paths li {
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-path-num {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .faq-support-paths h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  color: var(--white);
}

.page-faq .faq-support-paths p {
  margin: 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-support-side {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(10, 16, 48, 0.66);
}

.page-faq .faq-support-hours {
  margin: 14px 0 12px;
  font-size: 18px;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-faq .faq-support-note {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-support-mail {
  display: grid;
  gap: 6px;
  margin: 0;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-support-key {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-support-mail .mono {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--white);
  word-break: break-all;
}

/* ---------- 下一步 ---------- */

.page-faq .faq-next-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.page-faq .faq-next-card {
  position: relative;
  display: block;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(19, 26, 69, 0.84), rgba(13, 19, 52, 0.84));
  color: inherit;
  text-decoration: none;
  transition: border-color 220ms var(--ease), transform 220ms var(--ease), box-shadow 220ms var(--ease);
}

.page-faq .faq-next-card h3 {
  margin: 12px 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  color: var(--white);
}

.page-faq .faq-next-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-next-go {
  display: inline-block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--gold);
}

.page-faq .faq-next-card:hover,
.page-faq .faq-next-card:focus-visible {
  border-color: var(--line-cyan);
  box-shadow: 0 0 0 1px rgba(43, 231, 224, 0.28), 0 12px 28px rgba(0, 0, 0, 0.35);
  transform: translateY(-3px);
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 48px 0 56px;
  }

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

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

  .page-faq .faq-support-card {
    padding: 34px 30px 36px;
  }

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

  .page-faq .faq-support-paths li {
    border-top: none;
    border-left: 2px solid var(--line-cyan);
    padding: 2px 0 2px 16px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-spec-layout {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: 32px;
  }

  .page-faq .faq-support-card {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding: 64px 0 64px;
  }

  .page-faq .faq-answers-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-side-inner {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-item > summary {
    font-size: 17px;
    padding: 20px 22px;
  }

  .page-faq .faq-answer {
    padding: 0 22px 22px 42px;
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-next-card {
    transition: none;
  }

  .page-faq .faq-next-card:hover,
  .page-faq .faq-next-card:focus-visible {
    transform: none;
  }
}