.page-faq {
  --faq-cut: 16px;
  --faq-panel: #131A24;
  --faq-panel-up: #182231;
  --faq-rail-line: rgba(212, 162, 76, .42);
  padding-bottom: clamp(48px, 8vw, 104px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 44px) 0 clamp(28px, 5vw, 56px);
  background:
    radial-gradient(circle at 88% 12%, rgba(0, 229, 255, .12), transparent 58%),
    radial-gradient(circle at 8% 92%, rgba(122, 92, 255, .14), transparent 62%),
    var(--ink);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -10% -5%;
  background-image: repeating-linear-gradient(115deg, rgba(0, 229, 255, .07) 0 1px, transparent 1px 26px);
  transform: translateY(calc(var(--track, 0px) * .4));
  pointer-events: none;
}

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

.page-faq .breadcrumbs {
  margin-bottom: clamp(18px, 3vw, 32px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-hero__copy h1 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.2vw, 54px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--fog);
}

.page-faq .faq-hero__copy .lead {
  margin: 0;
  max-width: 40em;
  color: var(--muted);
  line-height: 1.85;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* 现象定位卡 */
.page-faq .faq-locator {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-locator__card {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 16px 18px 16px 20px;
  text-decoration: none;
  color: var(--fog);
  background: linear-gradient(135deg, var(--faq-panel), var(--ink) 78%);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, var(--faq-cut) 100%, 0 calc(100% - var(--faq-cut)));
  transition: background .18s ease, transform .18s ease;
}

.page-faq .faq-locator__card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14%;
  bottom: 14%;
  width: 2px;
  background: linear-gradient(var(--cyan), rgba(0, 229, 255, .1));
}

.page-faq .faq-locator__card:hover,
.page-faq .faq-locator__card:focus-visible {
  background: linear-gradient(135deg, var(--faq-panel-up), var(--faq-panel) 78%);
  transform: translateX(2px);
}

.page-faq .faq-locator__no {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-faq .faq-locator__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -.01em;
}

.page-faq .faq-locator__desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

/* ---------- 头部视觉 ---------- */
.page-faq .faq-visual-section {
  padding: clamp(20px, 3vw, 36px) 0 0;
}

.page-faq .faq-visual,
.page-faq .faq-flow {
  display: block;
  margin: 0;
  border: 1px solid var(--line-soft);
}

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

.page-faq .faq-visual .media-frame__label,
.page-faq .faq-flow .media-frame__label {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(30px, 4vw, 48px);
  margin-top: clamp(32px, 5vw, 60px);
}

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

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding-bottom: clamp(30px, 4vw, 48px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: clamp(28px, 4vw, 44px);
  position: relative;
}

.page-faq .faq-group + .faq-group::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 66%;
  height: 1px;
  background: linear-gradient(90deg, var(--sand), rgba(212, 162, 76, .04));
}

.page-faq .faq-group__head {
  margin-bottom: clamp(16px, 2.6vw, 26px);
}

.page-faq .faq-group__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--sand);
  text-transform: uppercase;
}

.page-faq .faq-group__head h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.2;
  letter-spacing: -.015em;
  color: var(--fog);
}

.page-faq .faq-group__intro {
  margin: 0;
  max-width: 38em;
  color: var(--muted);
  line-height: 1.8;
}

.page-faq .faq-group__go {
  margin: 22px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line-soft);
  font-size: 14px;
}

.page-faq .faq-group__go a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .35);
  padding-bottom: 2px;
}

.page-faq .faq-group__go a:hover,
.page-faq .faq-group__go a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa {
  border-top: 1px solid var(--line-soft);
}

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.5;
  color: var(--fog);
  transition: color .16s ease;
}

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

.page-faq .qa__q::after {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin: 6px 0 0 auto;
  background: var(--cyan);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
  transition: transform .18s ease;
}

.page-faq .qa[open] .qa__q::after {
  transform: rotate(90deg);
}

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--cyan-soft);
}

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

/* ---------- 步骤序列 ---------- */
.page-faq .steps {
  position: relative;
  list-style: none;
  margin: 4px 0 22px;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .steps::before {
  content: "";
  position: absolute;
  left: 39px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(0, 229, 255, .06));
}

.page-faq .step {
  position: relative;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-faq .step__no {
  padding-top: 2px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

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

.page-faq .step__check {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-faq .step__title {
  display: block;
  position: relative;
  padding-left: 26px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.7;
  color: var(--fog);
}

.page-faq .step__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--graphite);
  background: var(--ink);
  transition: border-color .16s ease, background .16s ease;
}

.page-faq .step__title:hover::before {
  border-color: var(--cyan);
}

.page-faq .step__check:focus-visible + .step__title::before {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .step__check:checked + .step__title {
  color: var(--muted);
  text-decoration: line-through;
  text-decoration-color: rgba(154, 169, 186, .5);
}

.page-faq .step__check:checked + .step__title::before {
  background: var(--ok);
  border-color: var(--ok);
  box-shadow: inset 0 0 0 3px var(--ink);
}

.page-faq .step__expect {
  margin: 6px 0 0;
  padding-left: 26px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--cyan-soft);
  opacity: .86;
}

.page-faq .step__check:checked ~ .step__expect {
  color: var(--muted);
  opacity: .6;
}

/* ---------- 工单准备 ---------- */
.page-faq .faq-ticket {
  margin-top: clamp(32px, 5vw, 56px);
  padding: clamp(24px, 4vw, 40px) clamp(18px, 3vw, 34px);
  position: relative;
  background: linear-gradient(150deg, var(--faq-panel) 0%, var(--ink) 100%);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

.page-faq .faq-ticket::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(0, 229, 255, .06) 0 1px, transparent 1px 30px);
  pointer-events: none;
}

.page-faq .faq-ticket__head,
.page-faq .faq-ticket__grid {
  position: relative;
  z-index: 1;
}

.page-faq .faq-ticket__head h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.22;
  letter-spacing: -.015em;
  color: var(--fog);
}

.page-faq .faq-ticket__intro {
  margin: 0;
  max-width: 40em;
  color: var(--muted);
  line-height: 1.8;
}

.page-faq .faq-ticket__grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-checklist li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(42, 52, 65, .55);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--fog);
}

.page-faq .faq-checklist__k {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--lava);
}

.page-faq .faq-ticket__panel {
  padding: 20px 20px 22px;
  background: rgba(24, 34, 49, .78);
  border-left: 2px solid var(--lava);
}

.page-faq .faq-ticket__panel p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--fog);
}

.page-faq .faq-ticket__panel a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .32);
}

.page-faq .faq-ticket__panel a:hover,
.page-faq .faq-ticket__panel a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-ticket__panel-title {
  font-family: var(--font-serif);
  letter-spacing: .14em;
  font-size: 13px;
  color: var(--sand) !important;
}

.page-faq .faq-ticket__panel-note {
  color: var(--muted) !important;
  font-size: 13px !important;
}

.page-faq .faq-ticket__panel .btn {
  margin-top: 8px;
  width: 100%;
  justify-content: center;
}

/* ---------- 右侧变更说明栏 ---------- */
.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail__inner {
  padding: 20px 18px 22px;
  background: var(--faq-panel);
  border-top: 1px solid var(--faq-rail-line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-faq .faq-rail__title {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--sand);
}

.page-faq .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 15px;
}

.page-faq .rail-item {
  display: grid;
  gap: 5px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(42, 52, 65, .6);
}

.page-faq .rail-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .rail-item__ver {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .rail-item__text {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--fog);
}

.page-faq .rail-item .tag {
  justify-self: start;
  margin-top: 2px;
  font-size: 11.5px;
}

.page-faq .faq-rail__go {
  display: inline-block;
  margin-top: 18px;
  font-size: 13px;
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .32);
}

.page-faq .faq-rail__go:hover,
.page-faq .faq-rail__go:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }

  .page-faq .faq-ticket__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 66fr) minmax(0, 34fr);
    align-items: start;
  }

  .page-faq .faq-rail__inner {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero::before {
    transform: none;
  }

  .page-faq .faq-locator__card,
  .page-faq .qa__q::after {
    transition: none;
  }
}
<<<END>>>