.page-faq {
  --faq-rail: 46px;
  --faq-body: rgba(242, 246, 251, .82);
  padding-top: clamp(1.5rem, 4vw, 3rem);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

/* ── 首屏 ───────────────────────────── */
.page-faq .faq-hero {
  padding-bottom: clamp(2rem, 5vw, 3rem);
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-title {
  margin: .75rem 0 0;
  font-size: clamp(2.5rem, 9vw, 6rem);
  font-weight: 200;
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--data);
}

.page-faq .faq-title-sub {
  display: block;
  margin-top: .9rem;
  font-size: clamp(1.25rem, 3.4vw, 2rem);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.35;
  color: var(--index);
}

.page-faq .faq-lead {
  max-width: 44ch;
  margin: 1.75rem 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--faq-body);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .7rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .4rem .85rem;
  border: 1px solid var(--rule);
  border-radius: var(--r-pill);
  font-size: 12px;
  color: var(--index);
  text-decoration: none;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

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

.page-faq .faq-jump-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--cyan);
}

/* ── 主体布局 ────────────────────────── */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3.5rem);
  margin-top: clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-main {
  min-width: 0;
}

/* ── 技能树步骤 ──────────────────────── */
.page-faq .faq-step {
  display: grid;
  grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  column-gap: clamp(.9rem, 2.5vw, 1.6rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.25rem);
}

.page-faq .faq-step:last-of-type {
  padding-bottom: 0;
}

.page-faq .faq-step-rail {
  position: relative;
}

.page-faq .faq-step-rail::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 44px;
  bottom: 0;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(89, 216, 255, .45), rgba(42, 58, 85, .18));
}

.page-faq .faq-step:last-of-type .faq-step-rail::after {
  display: none;
}

.page-faq .faq-node {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: var(--faq-rail);
  height: 40px;
  border: 1px solid var(--rule);
  border-radius: var(--r-pill);
  background: var(--night);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .faq-step-body > h2 {
  margin: 0;
  font-size: clamp(1.75rem, 3.8vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--data);
  scroll-margin-top: 110px;
}

.page-faq .faq-step-body > p {
  max-width: 62ch;
  margin: 1rem 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--faq-body);
}

.page-faq .faq-step-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(89, 216, 255, .45);
  transition: border-color .25s var(--ease), color .25s var(--ease);
}

.page-faq .faq-step-body a:hover,
.page-faq .faq-step-body a:focus-visible {
  color: var(--data);
  border-bottom-color: var(--data);
  outline: none;
}

/* 步骤列表 */
.page-faq .faq-flow {
  display: grid;
  gap: 1px;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-faq .faq-flow li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  background: var(--stand);
  transition: background .3s var(--ease);
}

.page-faq .faq-flow li:hover {
  background: var(--card);
}

.page-faq .faq-flow-key {
  padding-top: .2rem;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-flow h3 {
  margin: 0 0 .35rem;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--data);
}

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

/* 图示 */
.page-faq .faq-figure {
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
}

.page-faq .faq-figure .media {
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--stand);
}

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

.page-faq .faq-figure figcaption {
  margin-top: .8rem;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.7;
  color: var(--index);
}

.page-faq .faq-figure--tall {
  max-width: 640px;
}

/* ── 标签卡 ──────────────────────────── */
.page-faq .faq-tags {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1px;
  margin: clamp(1.8rem, 4.5vw, 2.75rem) 0 0;
  padding: 0;
  list-style: none;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-faq .faq-tagcard {
  padding: 1.25rem 1.3rem 1.4rem;
  background: var(--stand);
  transition: background .35s var(--ease);
  cursor: default;
}

.page-faq .faq-tagcard:hover,
.page-faq .faq-tagcard:focus-within,
.page-faq .faq-tagcard:focus-visible {
  background: var(--card);
  outline: none;
}

.page-faq .faq-tagcard-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem;
}

.page-faq .faq-tagcard-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--data);
}

.page-faq .faq-tagnote {
  margin: .7rem 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--index);
  opacity: .5;
  transform: translateY(3px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), color .3s var(--ease);
}

.page-faq .faq-tagcard:hover .faq-tagnote,
.page-faq .faq-tagcard:focus-within .faq-tagnote,
.page-faq .faq-tagcard:focus-visible .faq-tagnote {
  opacity: 1;
  transform: none;
  color: var(--faq-body);
}

/* ── 提示条 ──────────────────────────── */
.page-faq .faq-aside-note {
  margin: 1.5rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--cyan);
  font-size: 14px;
  line-height: 1.85;
  color: var(--index);
  max-width: 60ch;
}

.page-faq .faq-callout {
  margin: 1.6rem 0 0;
  padding: 1rem 1.25rem;
  border-left: 2px solid var(--warn);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--warn-soft);
}

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

/* ── 问答折叠 ────────────────────────── */
.page-faq .faq-qalist {
  margin-top: 1.75rem;
  border-top: 1px solid var(--rule);
}

.page-faq .faq-qa {
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-qa summary {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) auto;
  gap: .9rem;
  align-items: center;
  padding: 1.15rem 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--data);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-qa summary::before {
  content: 'Q';
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--rule);
  border-radius: var(--r-pill);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--away);
}

.page-faq .faq-qa summary::after {
  content: '+';
  font-family: var(--mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
  transition: transform .3s var(--ease);
}

.page-faq .faq-qa[open] summary::after {
  transform: rotate(45deg);
}

.page-faq .faq-qa summary:hover,
.page-faq .faq-qa summary:focus-visible {
  color: var(--cyan);
  outline: none;
}

.page-faq .faq-answer {
  padding: 0 0 1.35rem 35px;
}

.page-faq .faq-answer p {
  max-width: 56ch;
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--index);
}

.page-faq .faq-qa[open] .faq-answer {
  animation: faq-open .32s var(--ease);
}

.page-faq .faq-qa[open] .faq-answer p {
  max-width: 46ch;
}

.page-faq .faq-answer b {
  color: var(--data);
  font-weight: 700;
}

@keyframes faq-open {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── 侧边索引 ────────────────────────── */
.page-faq .faq-aside {
  display: none;
}

.page-faq .faq-aside-title {
  margin: 0 0 .9rem;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--index);
}

.page-faq .faq-aside ul {
  display: grid;
  gap: .6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-aside a {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: .45rem;
  font-size: 12px;
  line-height: 1.6;
  color: var(--index);
  text-decoration: none;
  transition: color .25s var(--ease);
}

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

.page-faq .faq-aside-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--rule);
}

.page-faq .faq-top {
  display: inline-block;
  margin-top: 1.5rem;
  padding: .35rem .75rem;
  border: 1px solid var(--rule);
  border-radius: var(--r-pill);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--cyan);
  text-decoration: none;
  transition: border-color .25s var(--ease);
}

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

/* ── 断点 ────────────────────────────── */
@media (max-width: 560px) {
  .page-faq {
    --faq-rail: 34px;
  }

  .page-faq .faq-node {
    height: 34px;
  }

  .page-faq .faq-step-rail::after {
    top: 38px;
  }

  .page-faq .faq-flow li {
    grid-template-columns: minmax(0, 1fr);
    gap: .4rem;
  }

  .page-faq .faq-answer {
    padding-left: 0;
  }

  .page-faq .faq-qa summary {
    grid-template-columns: 22px minmax(0, 1fr) auto;
    gap: .7rem;
  }

  .page-faq .faq-qa summary::before {
    width: 22px;
    height: 22px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 176px;
  }

  .page-faq .faq-aside {
    display: block;
    position: sticky;
    top: 104px;
    align-self: start;
    padding-left: 1.25rem;
    border-left: 1px solid var(--rule);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation: none !important;
    transition: none !important;
  }

  .page-faq .faq-tagnote {
    opacity: 1;
    transform: none;
  }
}