.page-faq {
  --faq-rail: 300px;
  position: relative;
  padding-bottom: var(--s16);
}

.page-faq::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 460px;
  pointer-events: none;
  background:
    radial-gradient(58% 62% at 26% 8%, rgba(31, 224, 208, .14), transparent 72%),
    radial-gradient(42% 52% at 88% 0%, rgba(255, 107, 74, .10), transparent 72%);
}

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

/* 面包屑 */
.page-faq .breadcrumbs {
  padding-top: var(--s6);
}

.page-faq .crumbs {
  margin: 0;
  font-family: var(--font-label);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-dim);
  text-transform: uppercase;
}

.page-faq .crumbs a {
  color: var(--ink-dim);
  text-decoration: none;
  transition: color .2s ease;
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--pulse);
}

.page-faq .crumbs [aria-current="page"] {
  color: var(--ink);
}

.page-faq .crumb-sep {
  margin: 0 10px;
  color: rgba(157, 178, 192, .45);
}

/* 首屏 */
.page-faq .faq-head {
  max-width: 76ch;
  padding: var(--s6) 0 0;
}

.page-faq .faq-head .kicker {
  margin: 0 0 var(--s2);
}

.page-faq .faq-head h1 {
  margin: 0 0 var(--s3);
  font-size: clamp(28px, 4.6vw, 52px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-faq .faq-head .lede {
  margin: 0;
  max-width: 68ch;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.85;
  color: var(--ink-soft);
}

/* 分类入口：斜切块 */
.page-faq .faq-index {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: var(--s2);
  margin-top: var(--s6);
}

.page-faq .faq-chip {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 18px 20px 22px;
  background: linear-gradient(152deg, rgba(14, 44, 69, .74), rgba(8, 33, 51, .52));
  border: 1px solid var(--line);
  border-left: 3px solid rgba(31, 224, 208, .34);
  border-radius: 2px var(--r2) var(--r2) 2px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  color: var(--ink);
  text-decoration: none;
  transition: background .25s ease, border-color .25s ease, transform .25s ease;
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  background: linear-gradient(152deg, rgba(31, 224, 208, .20), rgba(14, 44, 69, .68));
  border-color: var(--line-strong);
  border-left-color: var(--pulse);
  transform: translateY(-2px);
}

.page-faq .faq-chip__no {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--pulse);
}

.page-faq .faq-chip__t {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-faq .faq-chip__d {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-dim);
}

/* 主区 + 侧栏 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s6);
  margin-top: var(--s8);
}

/* 章节 */
.page-faq .faq-block {
  padding-top: var(--s8);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--pulse-h) + var(--bar-h) + 20px);
}

.page-faq .faq-block:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-block__head {
  display: grid;
  gap: var(--s2);
  max-width: 70ch;
}

.page-faq .faq-block__no {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--pulse);
}

.page-faq .faq-block__no::after {
  content: "";
  width: 44px;
  height: 1px;
  background: var(--line-strong);
}

.page-faq .faq-block__head h2 {
  margin: 0;
  font-size: clamp(22px, 2.6vw, 32px);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-faq .faq-block__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* 图 */
.page-faq .faq-figure {
  margin: var(--s4) 0 0;
}

.page-faq .faq-figure img {
  border-radius: var(--r2);
}

.page-faq .faq-figure .media__cap {
  margin-top: var(--s2);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-dim);
}

/* 提醒时间轴 */
.page-faq .faq-timeline {
  list-style: none;
  margin: var(--s4) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s3);
}

.page-faq .faq-timeline__item {
  position: relative;
  display: grid;
  gap: 2px;
  padding-top: 20px;
}

.page-faq .faq-timeline__node {
  position: absolute;
  top: 0;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--abyss-900);
  border: 2px solid var(--pulse);
  box-shadow: 0 0 10px rgba(31, 224, 208, .5);
}

.page-faq .faq-timeline__k {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-timeline__v {
  font-size: 13px;
  color: var(--ink-dim);
}

/* 问答 */
.page-faq .faq-list {
  display: grid;
  gap: var(--s2);
  margin-top: var(--s4);
}

.page-faq .q {
  position: relative;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--line-soft);
  border-radius: var(--r2);
  background: rgba(8, 33, 51, .48);
  transition: border-color .22s ease, background .22s ease, box-shadow .22s ease;
}

.page-faq .q:hover {
  border-color: var(--line);
}

.page-faq .q[open] {
  border-left-color: var(--pulse);
  border-color: var(--line);
  background: linear-gradient(158deg, rgba(31, 224, 208, .09), rgba(8, 33, 51, .78));
  box-shadow: -8px 0 20px -10px rgba(31, 224, 208, .55);
}

.page-faq .q > summary {
  position: relative;
  display: block;
  padding: 16px 46px 16px 18px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .q > summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--pulse);
}

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

.page-faq .q > summary:focus-visible {
  outline: 2px solid var(--pulse);
  outline-offset: -2px;
  border-radius: var(--r2);
}

.page-faq .q__body {
  padding: 0 18px 18px 18px;
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
  margin-top: -2px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.82;
}

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

.page-faq .q__body a {
  color: var(--pulse);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .q__body a:hover,
.page-faq .q__body a:focus-visible {
  color: var(--cyan-300);
}

/* 侧栏 */
.page-faq .faq-side {
  padding: var(--s4) var(--s4) var(--s3);
  border: 1px solid var(--line);
  border-radius: var(--r3);
  background: linear-gradient(168deg, rgba(14, 44, 69, .88), rgba(4, 18, 31, .94));
}

.page-faq .faq-side__kicker {
  margin: 0 0 var(--s2);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-label);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--coral);
}

.page-faq .faq-side__kicker::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--coral);
  box-shadow: 0 0 8px rgba(255, 107, 74, .7);
}

.page-faq .faq-side__t {
  margin: 0 0 var(--s2);
  font-size: 20px;
  line-height: 1.4;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-side__d {
  margin: 0 0 var(--s3);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-side__list {
  list-style: none;
  margin: 0 0 var(--s4);
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-side__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-faq .faq-side__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  background: var(--pulse);
  transform: rotate(45deg);
}

.page-faq .faq-side .btn {
  margin-bottom: var(--s3);
}

.page-faq .faq-side__meta {
  margin: 0 0 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-dim);
  word-break: break-word;
}

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

/* 平板及以上 */
@media (min-width: 720px) {
  .page-faq .faq-timeline {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--s2);
    padding-top: 6px;
  }

  .page-faq .faq-timeline::before {
    content: "";
    position: absolute;
    left: 6px;
    right: 6px;
    top: 12px;
    height: 1px;
    background: linear-gradient(90deg, rgba(31, 224, 208, .65), rgba(31, 224, 208, .1));
  }

  .page-faq .faq-timeline__item {
    padding-top: 26px;
  }

  .page-faq .faq-timeline__node {
    top: 6px;
  }
}

/* 桌面：主区 + 常驻窄栏 */
@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) var(--faq-rail);
    gap: var(--s8);
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--pulse-h) + 28px);
  }

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

@media (min-width: 1280px) {
  .page-faq .faq-head h1 {
    font-size: clamp(34px, 3.6vw, 54px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .q {
    transition: none;
  }

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