.page-faq {
  --faq-card: rgba(215, 255, 244, 0.055);
  --faq-overlay: rgba(6, 26, 21, 0.55);
  color: var(--ice);
  background:
    radial-gradient(120% 70% at 8% 0%, rgba(53, 242, 208, 0.1), transparent 58%),
    radial-gradient(90% 55% at 102% 22%, rgba(255, 107, 44, 0.08), transparent 62%);
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
  overflow-x: clip;
}

.page-faq .faq-shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 面包屑 */
.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  padding-top: clamp(1rem, 3vw, 1.6rem);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}
.page-faq .faq-crumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color var(--t) var(--ease);
}
.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  color: var(--cyan);
}
.page-faq .faq-crumb__sep {
  color: var(--cyan-deep);
}

/* 首屏 */
.page-faq .faq-hero {
  padding-block: clamp(1.3rem, 3.5vw, 2.4rem) clamp(2rem, 5vw, 3.4rem);
}
.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(1.6rem, 3vw, 2.6rem);
  min-width: 0;
}
.page-faq .faq-hero__main {
  min-width: 0;
}
.page-faq .faq-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--orange);
}
.page-faq .faq-kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--orange);
}
.page-faq h1 {
  margin: 0.7rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 7vw, 3.9rem);
  line-height: 1.03;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
.page-faq h1 span {
  display: inline-block;
  color: var(--cyan);
}
.page-faq .faq-hero__lead {
  margin: 1.1rem 0 0;
  max-width: 62ch;
  font-size: clamp(0.95rem, 1.6vw, 1.02rem);
  line-height: 1.85;
  color: var(--mist);
}

/* 左侧索引 */
.page-faq .faq-index {
  min-width: 0;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--faq-overlay);
}
.page-faq .faq-index__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}
.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.05rem;
}
.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.2rem 0.55rem 0;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color var(--t) var(--ease);
}
.page-faq .faq-index__list li:last-child .faq-index__link {
  border-bottom: none;
}
.page-faq .faq-index__dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan-deep);
  box-shadow: 0 0 0 3px rgba(53, 242, 208, 0.12);
  transition: background var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--ice);
}
.page-faq .faq-index__link:hover .faq-index__dot,
.page-faq .faq-index__link:focus-visible .faq-index__dot {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 242, 208, 0.24);
}
.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--glass-edge);
  outline-offset: 3px;
  border-radius: 3px;
}

/* 三条高频任务 */
.page-faq .faq-tasks {
  display: grid;
  gap: 0.7rem;
  margin-top: clamp(1.5rem, 3.5vw, 2.1rem);
}
.page-faq .faq-task {
  --faq-edge: var(--cyan);
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--faq-edge);
  border-radius: var(--radius-sm);
  background: var(--faq-card);
  color: inherit;
  text-decoration: none;
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease),
    background var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
.page-faq .faq-task:nth-child(2) {
  --faq-edge: var(--yellow);
}
.page-faq .faq-task:nth-child(3) {
  --faq-edge: var(--orange);
}
.page-faq .faq-task:hover {
  transform: translateY(-2px);
  border-color: var(--glass-edge);
  border-left-color: var(--faq-edge);
  background: rgba(215, 255, 244, 0.09);
  box-shadow: var(--shadow-raise);
}
.page-faq .faq-task:focus-visible {
  outline: 2px solid var(--glass-edge);
  outline-offset: 2px;
}
.page-faq .faq-task__num {
  flex: 0 0 auto;
  padding-top: 0.15rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--faq-edge);
}
.page-faq .faq-task__body {
  min-width: 0;
  display: grid;
  gap: 0.2rem;
}
.page-faq .faq-task__tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--faq-edge);
}
.page-faq .faq-task__q {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ice);
}
.page-faq .faq-task__a {
  font-size: 0.85rem;
  line-height: 1.72;
  color: var(--mist);
}
.page-faq .faq-task__go {
  margin-left: auto;
  align-self: center;
  font-family: var(--font-mono);
  color: var(--faq-edge);
  opacity: 0.7;
  transition: opacity var(--t) var(--ease);
}
.page-faq .faq-task:hover .faq-task__go,
.page-faq .faq-task:focus-visible .faq-task__go {
  opacity: 1;
}

/* 章节骨架 */
.page-faq .faq-block {
  margin-top: clamp(2.4rem, 6vw, 4.2rem);
  scroll-margin-top: 1.5rem;
}
.page-faq .faq-block__head {
  position: relative;
  display: grid;
  gap: 0.35rem;
  padding-bottom: 0.9rem;
  margin-bottom: clamp(1.1rem, 2.5vw, 1.8rem);
  border-bottom: 1px solid var(--line-strong);
}
.page-faq .faq-block__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 62px;
  height: 2px;
  background: var(--cyan);
}
.page-faq .faq-block__no {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--cyan-deep);
}
.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 3.6vw, 2.2rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
}
.page-faq .faq-block__note {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--mist);
}

/* 三节点状态带 */
.page-faq .faq-states {
  display: grid;
  gap: 0.6rem;
  margin-bottom: clamp(1.2rem, 3vw, 1.9rem);
}
.page-faq .faq-state {
  --s: var(--cyan);
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--line);
  border-top: 2px solid var(--s);
  border-radius: var(--radius-sm);
  background: var(--faq-overlay);
}
.page-faq .faq-state:nth-child(2) {
  --s: var(--yellow);
}
.page-faq .faq-state:nth-child(3) {
  --s: var(--orange);
}
.page-faq .faq-state__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--s);
}
.page-faq .faq-state__text {
  display: block;
  margin-top: 0.28rem;
  font-size: 0.87rem;
  line-height: 1.68;
  color: var(--mist);
}

/* 分栏 */
.page-faq .faq-split {
  display: grid;
  gap: clamp(1.3rem, 3vw, 2.2rem);
  min-width: 0;
}

/* 问答折叠 */
.page-faq .qa-list {
  min-width: 0;
  display: grid;
}
.page-faq .qa {
  border-bottom: 1px solid var(--line);
  transition: background var(--t) var(--ease);
}
.page-faq .qa:first-child {
  border-top: 1px solid var(--line);
}
.page-faq .qa[open] {
  background: linear-gradient(90deg, rgba(53, 242, 208, 0.07), transparent 62%);
}
.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.95rem 0.2rem 0.95rem 0;
  list-style: none;
  cursor: pointer;
  font-size: 0.97rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ice);
  transition: color var(--t) var(--ease);
}
.page-faq .qa__q::-webkit-details-marker {
  display: none;
}
.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--cyan-deep);
  transition: color var(--t) var(--ease);
}
.page-faq .qa[open] .qa__q::after {
  content: "–";
  color: var(--cyan);
}
.page-faq .qa__q:hover {
  color: var(--cyan);
}
.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--glass-edge);
  outline-offset: 3px;
  border-radius: 3px;
}
.page-faq .qa__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--cyan-deep);
}
.page-faq .qa__a {
  margin: 0;
  padding: 0 0 1.1rem;
  max-width: 66ch;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--mist);
}

/* 图 */
.page-faq .faq-figure {
  margin: 0;
  min-width: 0;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-800);
}
.page-faq .faq-figure figcaption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.65;
  color: var(--mist);
}
.page-faq .faq-wide {
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
}

/* 双场时间轴示意 */
.page-faq .faq-timeline {
  display: grid;
  gap: 0.55rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--faq-overlay);
}
.page-faq .faq-timeline__row {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.page-faq .faq-timeline__label {
  flex: 0 0 3.2rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--mist);
}
.page-faq .faq-timeline__bar {
  flex: 1 1 auto;
  min-width: 0;
  height: 8px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--cyan-deep), var(--cyan));
}
.page-faq .faq-timeline__bar--second {
  background: linear-gradient(90deg, var(--orange), var(--yellow));
}
.page-faq .faq-timeline__gap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-left: 3.9rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--yellow);
}
.page-faq .faq-timeline__gap::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--yellow);
}

/* 信息密度对照 */
.page-faq .density-grid {
  display: grid;
  gap: 0.7rem;
}
.page-faq .density {
  min-width: 0;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(11, 42, 34, 0.72);
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease);
}
.page-faq .density:hover {
  border-color: var(--cyan-deep);
  transform: translateY(-2px);
}
.page-faq .density__name {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}
.page-faq .density__flag {
  padding: 0.1rem 0.4rem;
  border: 1px solid var(--line-strong);
  border-radius: 99px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.page-faq .density__sample {
  margin: 0 0 0.6rem;
  color: var(--ice);
  line-height: 1.5;
  border-left: 2px solid var(--cyan-deep);
  padding-left: 0.6rem;
}
.page-faq .density--standard .density__sample {
  font-size: 0.84rem;
}
.page-faq .density--compact .density__sample {
  font-size: 0.73rem;
  line-height: 1.4;
}
.page-faq .density--large .density__sample {
  font-size: 1.02rem;
  line-height: 1.6;
}
.page-faq .density__use {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.72;
  color: var(--mist);
}
.page-faq .faq-density-qa {
  margin-top: clamp(1.2rem, 3vw, 1.8rem);
}

/* 反馈与资料 */
.page-faq .faq-support {
  display: grid;
  gap: clamp(1.1rem, 3vw, 1.8rem);
  padding: clamp(1.15rem, 3vw, 1.9rem);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(18, 59, 49, 0.85), rgba(6, 26, 21, 0.92));
}
.page-faq .faq-support__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
  line-height: 1.35;
}
.page-faq .faq-support__text {
  margin: 0;
  max-width: 56ch;
  font-size: 0.89rem;
  line-height: 1.82;
  color: var(--mist);
}
.page-faq .faq-support__note {
  margin: 0.7rem 0 0;
  font-size: 0.77rem;
  line-height: 1.7;
  color: var(--mist);
}
.page-faq .faq-mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.9rem;
  margin-top: 0.95rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--faq-card);
}
.page-faq .faq-mail__addr {
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ice);
  overflow-wrap: anywhere;
}
.page-faq .faq-copy {
  margin-left: auto;
  padding: 0.42rem 0.9rem;
  border: 1px solid var(--cyan-deep);
  border-radius: 99px;
  background: transparent;
  color: var(--cyan);
  font-family: var(--font-body);
  font-size: 0.77rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease);
}
.page-faq .faq-copy:hover {
  background: rgba(53, 242, 208, 0.15);
  border-color: var(--cyan);
}
.page-faq .faq-copy:focus-visible {
  outline: 2px solid var(--glass-edge);
  outline-offset: 2px;
}
.page-faq .faq-copy-status {
  display: block;
  width: 100%;
  min-height: 1.05rem;
  font-size: 0.75rem;
  color: var(--cyan);
}
.page-faq .faq-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}
.page-faq .faq-links a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.72rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(6, 26, 21, 0.45);
  color: var(--ice);
  font-size: 0.87rem;
  line-height: 1.6;
  text-decoration: none;
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease),
    transform var(--t) var(--ease);
}
.page-faq .faq-links a span {
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  color: var(--cyan-deep);
}
.page-faq .faq-links a:hover {
  border-color: var(--cyan-deep);
  background: rgba(53, 242, 208, 0.1);
  transform: translateY(-1px);
}
.page-faq .faq-links a:focus-visible {
  outline: 2px solid var(--glass-edge);
  outline-offset: 2px;
}

/* 响应式 */
@media (min-width: 640px) {
  .page-faq .density-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-faq .faq-states {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.58fr);
    align-items: start;
  }
  .page-faq .faq-figure,
  .page-faq .faq-timeline {
    position: sticky;
    top: 1.5rem;
  }
  .page-faq .faq-figure img {
    max-height: 640px;
  }
  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-index {
    grid-column: 1;
    grid-row: 1;
    position: sticky;
    top: 1.5rem;
    border: none;
    border-left: 1px solid var(--line);
    border-radius: 0;
    background: transparent;
    padding: 0.15rem 0 0 1rem;
  }
  .page-faq .faq-hero__main {
    grid-column: 2;
    grid-row: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-task,
  .page-faq .faq-task:hover,
  .page-faq .faq-links a,
  .page-faq .faq-links a:hover,
  .page-faq .density,
  .page-faq .density:hover {
    transition: none;
    transform: none;
  }
}