/* ============ 问题排查页 · page-faq ============ */

.page-faq {
  --faq-axis-w: 236px;
  --faq-step-col: 64px;
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-sans);
}

/* ---- 面包屑 ---- */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-block: 18px 2px;
  font-size: 13px;
}

.page-faq .breadcrumb__link {
  color: var(--mist);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

.page-faq .breadcrumb__link:hover {
  color: var(--glow);
}

.page-faq .breadcrumb__sep {
  color: var(--line);
}

.page-faq .breadcrumb__current {
  color: var(--white);
}

/* ---- 首屏 ---- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(32px, 5.5vw, 68px) clamp(38px, 6vw, 78px);
  background:
    radial-gradient(120% 110% at 88% 0%, rgba(122, 92, 255, 0.20), transparent 58%),
    radial-gradient(95% 85% at 0% 108%, rgba(25, 227, 214, 0.13), transparent 60%),
    var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: 64%;
  height: 150%;
  background: linear-gradient(135deg, rgba(25, 227, 214, 0.11), rgba(122, 92, 255, 0.07) 46%, transparent 72%);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(28px, 5vw, 56px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-hero__lede {
  max-width: 46ch;
  margin-top: 18px;
  color: var(--mist);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__panel {
  align-self: end;
}

.page-faq .faq-hero__times {
  display: grid;
  gap: 14px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__times li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

.page-faq .faq-hero__times li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-hero__num {
  flex: 0 0 auto;
  min-width: 74px;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1.1;
  color: var(--gold);
}

.page-faq .faq-unit {
  margin-left: 3px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-faq .faq-hero__times em {
  font-style: normal;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---- 主体骨架 ---- */
.page-faq .faq-body {
  display: grid;
  gap: 34px;
  padding-block: clamp(38px, 5.5vw, 76px);
}

/* ---- 左侧分类轴 ---- */
.page-faq .faq-axis__title {
  margin: 0 0 12px 14px;
  color: var(--mist);
}

.page-faq .faq-axis__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-axis__item {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  padding: 11px 16px;
  font-size: 14px;
  white-space: nowrap;
  color: var(--mist);
  text-decoration: none;
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .faq-axis__item .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-axis__item:hover {
  color: var(--glow);
  border-color: rgba(25, 227, 214, 0.45);
  background: #0F1B3A;
}

.page-faq .faq-axis__item:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---- 章节 ---- */
.page-faq .faq-block {
  scroll-margin-top: 118px;
}

.page-faq .faq-block.section {
  padding-block: clamp(28px, 4.2vw, 52px);
}

.page-faq .faq-block + .faq-block {
  border-top: 1px solid var(--line);
}

.page-faq .faq-block__head {
  max-width: 64ch;
}

.page-faq .faq-block__index {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq .faq-block__title {
  position: relative;
  padding-left: 16px;
}

.page-faq .faq-block__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  width: 3px;
  height: 0.86em;
  background: linear-gradient(180deg, var(--cyan), var(--violet));
}

.page-faq .faq-block__grid {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

/* ---- 折叠问答 ---- */
.page-faq .qa {
  margin-bottom: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: border-color var(--t-fast) var(--ease), background var(--t-mid) var(--ease);
}

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

.page-faq .qa[open] {
  background: #0D1936;
  border-left-color: var(--cyan);
}

.page-faq .qa__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-faq .qa__num {
  flex: 0 0 auto;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

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

.page-faq .qa__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__tri {
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  margin-top: 6px;
  border-right: 1.5px solid var(--mist);
  border-bottom: 1.5px solid var(--mist);
  transform: rotate(45deg);
  transition: transform var(--t-mid) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .qa[open] .qa__tri {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}

.page-faq .qa__body {
  padding: 2px 20px 20px;
}

.page-faq .qa__steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .qa__step {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.page-faq .qa__step::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  width: 1px;
  height: 0;
  background: linear-gradient(180deg, var(--cyan), var(--violet));
}

.page-faq .qa__step-key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-faq .qa[open] .qa__step-key {
  color: var(--glow);
}

.page-faq .qa__step-text {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--white);
}

@keyframes faq-line-draw {
  from { height: 0; }
  to { height: 100%; }
}

@keyframes faq-step-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.page-faq .qa[open] .qa__step::before {
  animation: faq-line-draw var(--t-slow) var(--ease) both;
}

.page-faq .qa[open] .qa__step {
  animation: faq-step-in var(--t-slow) var(--ease) both;
}

.page-faq .qa[open] .qa__step:nth-child(1) { animation-delay: 40ms; }
.page-faq .qa[open] .qa__step:nth-child(2) { animation-delay: 140ms; }
.page-faq .qa[open] .qa__step:nth-child(3) { animation-delay: 240ms; }
.page-faq .qa[open] .qa__step:nth-child(4) { animation-delay: 340ms; }

/* ---- 配图 ---- */
.page-faq .faq-figure {
  margin: 0;
}

.page-faq .faq-figure .figure__frame {
  border: 1px solid var(--line);
}

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

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

/* ---- 联系区 ---- */
.page-faq .faq-block--contact {
  padding-bottom: clamp(44px, 6vw, 84px);
}

.page-faq .faq-contact {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-faq .faq-contact__item {
  padding: 20px 20px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--violet);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-faq .faq-contact__key {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-contact__val {
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.6;
  word-break: break-all;
  color: var(--white);
}

.page-faq .faq-contact__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 26px;
}

.page-faq .faq-contact__hint {
  margin: 0;
  font-size: 14px;
  color: var(--mist);
}

.page-faq .faq-contact__hint a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 214, 0.4);
}

.page-faq .faq-contact__hint a:hover {
  color: var(--glow);
}

/* ---- 断点 ---- */
@media (min-width: 640px) {
  .page-faq .qa__step {
    grid-template-columns: var(--faq-step-col) minmax(0, 1fr);
    gap: 14px;
    align-items: start;
  }

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

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: end;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-axis-w) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-axis {
    position: sticky;
    top: 108px;
  }

  .page-faq .faq-axis__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-block__grid--split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-block__grid--split .faq-figure {
    margin-top: 6px;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-hero__title {
    max-width: 22ch;
  }
}

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

  .page-faq .qa[open] .qa__step::before {
    height: 100%;
  }
}
<<<END>>>