.page-faq {
  --faq-line: rgba(14, 35, 64, .14);
  --faq-line-strong: rgba(14, 35, 64, .24);
  --faq-ink: #0E2340;
  --faq-ink-dim: rgba(14, 35, 64, .74);
  --faq-ink-faint: rgba(14, 35, 64, .46);
  --faq-c1: #17A2A6;
  --faq-c2: #C58E1C;
  --faq-c3: #0E6B6E;
  --faq-c4: #2FA878;
  --faq-rail-w: 236px;
  display: block;
  background: var(--c-deep);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-offset) + 34px) 0 clamp(40px, 5vw, 64px);
  background:
    radial-gradient(120% 92% at 84% 4%, rgba(23, 162, 166, .22), transparent 62%),
    linear-gradient(180deg, var(--c-deep), var(--c-night) 78%, var(--c-night));
  overflow: hidden;
}

.page-faq .faq-hero-scale {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: repeating-linear-gradient(90deg, var(--c-hair) 0 1px, transparent 1px 26px);
  pointer-events: none;
}

.page-faq .faq-hero-frame {
  position: relative;
  border: 1px solid var(--c-hair);
  background: rgba(7, 23, 41, .46);
  padding: clamp(22px, 3.6vw, 48px);
}

.page-faq .faq-hero-frame::before,
.page-faq .faq-hero-frame::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 1px solid var(--c-gold);
  pointer-events: none;
}

.page-faq .faq-hero-frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero-frame::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
}

.page-faq .frame-grid {
  display: grid;
  gap: clamp(26px, 3.4vw, 46px);
}

@media (min-width: 880px) {
  .page-faq .frame-grid {
    grid-template-columns: minmax(0, 1.16fr) minmax(276px, .84fr);
    align-items: end;
  }
}

.page-faq .frame-lead .crumbs {
  margin-bottom: 18px;
}

.page-faq .frame-lead .eyebrow {
  margin: 0 0 14px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(31px, 5.4vw, 58px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--ink);
  margin: 0 0 18px;
  max-width: 15em;
}

.page-faq .hero-lede {
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--ink-dim);
  margin: 0 0 26px;
  max-width: 40em;
}

.page-faq .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 首屏右侧热点列表 */
.page-faq .faq-hot {
  border: 1px solid var(--c-hair);
  background: rgba(7, 23, 41, .62);
  padding: 20px 20px 8px;
}

.page-faq .hot-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-lake-soft);
  margin: 0 0 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-hair);
}

.page-faq .hot-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .hot-list li + li {
  border-top: 1px solid rgba(29, 58, 92, .6);
}

.page-faq .hot-list a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 12px 2px;
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 14.5px;
  line-height: 1.5;
  transition: color .18s var(--ease), padding-left .18s var(--ease);
}

.page-faq .hot-list a:hover,
.page-faq .hot-list a:focus-visible {
  color: var(--ink);
  padding-left: 6px;
}

.page-faq .hot-idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-gold);
  flex: 0 0 auto;
}

/* 分类条带 */
.page-faq .faq-cats {
  display: grid;
  gap: 1px;
  margin-top: clamp(24px, 3vw, 36px);
}

@media (min-width: 680px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-faq .cat {
  --accent: var(--faq-c1);
  position: relative;
  display: block;
  padding: 20px 18px 22px;
  border: 1px solid var(--c-hair);
  background: rgba(7, 23, 41, .5);
  color: var(--ink);
  text-decoration: none;
  transition: border-color .2s var(--ease), transform .2s var(--ease), background .2s var(--ease);
}

.page-faq .cat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 2px;
  background: var(--accent);
}

.page-faq .cat:hover,
.page-faq .cat:focus-visible {
  border-color: var(--accent);
  background: rgba(7, 23, 41, .78);
  transform: translateY(-3px);
}

.page-faq .cat:nth-child(2) { --accent: var(--faq-c2); }
.page-faq .cat:nth-child(3) { --accent: var(--faq-c3); }
.page-faq .cat:nth-child(4) { --accent: var(--faq-c4); }

.page-faq .cat-idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--accent);
  margin-bottom: 8px;
}

.page-faq .cat-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -.01em;
  margin-bottom: 4px;
}

.page-faq .cat-count {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-gold-soft);
  margin-bottom: 8px;
}

.page-faq .cat-desc {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-faint);
}

/* ---------- 浅色问答主体 ---------- */
.page-faq .faq-main {
  background: var(--c-mist);
  color: var(--faq-ink);
  padding: clamp(36px, 5.5vw, 72px) 0 clamp(44px, 6vw, 84px);
}

.page-faq .faq-body {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4.2vw, 68px);
  }
}

/* 左侧常驻索引 */
.page-faq .faq-rail {
  align-self: start;
}

@media (min-width: 1000px) {
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-offset) + 18px);
  }
}

.page-faq .rail-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--faq-ink-faint);
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--faq-line-strong);
}

.page-faq .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 18px;
  overflow-x: auto;
  scrollbar-width: thin;
}

@media (min-width: 1000px) {
  .page-faq .rail-list {
    display: block;
    overflow: visible;
  }
}

.page-faq .rail-item {
  --accent: var(--faq-c1);
  flex: 0 0 auto;
}

.page-faq .rail-item:nth-child(2) { --accent: var(--faq-c2); }
.page-faq .rail-item:nth-child(3) { --accent: var(--faq-c3); }
.page-faq .rail-item:nth-child(4) { --accent: var(--faq-c4); }

@media (min-width: 1000px) {
  .page-faq .rail-item {
    flex: none;
  }
}

.page-faq .rail-link {
  position: relative;
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 12px 0;
  font-size: 15px;
  color: var(--faq-ink);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease);
}

@media (min-width: 1000px) {
  .page-faq .rail-link {
    border-top: 1px solid var(--faq-line);
    white-space: normal;
    padding-left: 14px;
  }

  .page-faq .rail-link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 11px;
    bottom: 11px;
    width: 2px;
    background: var(--accent);
    opacity: 0;
    transition: opacity .2s var(--ease);
  }

  .page-faq .rail-link:hover::before,
  .page-faq .rail-link:focus-visible::before {
    opacity: 1;
  }
}

.page-faq .rail-link:hover,
.page-faq .rail-link:focus-visible {
  color: var(--accent);
}

.page-faq .rail-idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--faq-ink-faint);
}

.page-faq .rail-note {
  display: none;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--faq-ink-faint);
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line);
}

@media (min-width: 1000px) {
  .page-faq .rail-note {
    display: block;
  }
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-flow {
  min-width: 0;
}

.page-faq .faq-group {
  position: relative;
  margin-bottom: clamp(42px, 5.5vw, 72px);
}

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

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  top: 4px;
  width: 2px;
  height: 0;
  background: linear-gradient(180deg, var(--c-lake), var(--c-gold));
  transition: height .5s var(--ease);
}

@media (min-width: 1000px) {
  .page-faq .faq-group::before {
    left: -20px;
  }

  .page-faq .faq-group.is-current::before {
    height: 66px;
  }
}

@media (max-width: 999px) {
  .page-faq .faq-group::before {
    left: 0;
    top: -14px;
  }

  .page-faq .faq-group.is-current::before {
    height: 3px;
    width: 56px;
  }
}

.page-faq .grp-account { --accent: var(--faq-c1); }
.page-faq .grp-billing { --accent: var(--faq-c2); }
.page-faq .grp-content { --accent: var(--faq-c3); }
.page-faq .grp-service { --accent: var(--faq-c4); }

.page-faq .faq-group .section-label {
  color: var(--accent);
  border-top-color: var(--accent);
}

.page-faq .faq-group h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3vw, 34px);
  line-height: 1.22;
  letter-spacing: -.015em;
  color: var(--faq-ink);
  margin: 10px 0 12px;
}

.page-faq .group-lead {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--faq-ink-dim);
  margin: 0 0 20px;
  max-width: 42em;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-item summary {
  position: relative;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px 40px 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.6vw, 16.5px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--faq-ink);
  transition: color .18s var(--ease);
}

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

.page-faq .faq-item summary:hover {
  color: var(--accent);
}

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 17px;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--accent);
  transition: transform .25s var(--ease);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
}

.page-faq .faq-q-mark {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  display: grid;
  place-items: center;
  border: 1px solid var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
}

.page-faq .faq-q-text {
  min-width: 0;
}

.page-faq .faq-a {
  border-left: 2px solid var(--c-lake-soft);
  margin: 0 0 22px 0;
  padding: 4px 0 4px 18px;
}

.page-faq .faq-a > p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--faq-ink-dim);
  max-width: 46em;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.7;
  color: var(--faq-ink-dim);
}

.page-faq .step-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--accent);
  padding-top: 2px;
}

.page-faq .faq-points {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-points li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--faq-ink-dim);
}

.page-faq .faq-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 1px;
  background: var(--accent);
}

/* ---------- 方案对比条 ---------- */
.page-faq .plan-strip {
  margin: 26px 0 4px;
  border: 1px solid var(--faq-line-strong);
  background: rgba(255, 255, 255, .6);
  padding: 18px 18px 16px;
}

.page-faq .strip-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--faq-ink-faint);
  margin: 0 0 6px;
}

.page-faq .strip-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(88px, 1fr));
  overflow-x: auto;
}

.page-faq .strip-track li {
  position: relative;
  padding: 22px 8px 12px;
  text-align: center;
  font-size: 13px;
  color: var(--faq-ink);
  border-top: 2px solid var(--faq-line-strong);
}

.page-faq .strip-track li::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  background: var(--c-gold);
}

.page-faq .strip-track li:nth-child(1) { border-top-color: rgba(232, 178, 58, .3); }
.page-faq .strip-track li:nth-child(2) { border-top-color: rgba(232, 178, 58, .48); }
.page-faq .strip-track li:nth-child(3) { border-top-color: rgba(232, 178, 58, .66); }
.page-faq .strip-track li:nth-child(4) { border-top-color: rgba(232, 178, 58, .84); }
.page-faq .strip-track li:nth-child(5) { border-top-color: var(--c-gold); }

.page-faq .strip-track li:nth-child(1)::before { opacity: .35; }
.page-faq .strip-track li:nth-child(2)::before { opacity: .55; }
.page-faq .strip-track li:nth-child(3)::before { opacity: .72; }
.page-faq .strip-track li:nth-child(4)::before { opacity: .88; }

.page-faq .strip-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: -.01em;
}

.page-faq .strip-note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--faq-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--faq-ink-dim);
}

/* ---------- 配图 ---------- */
.page-faq .faq-fig {
  margin: 28px 0 0;
  border-color: var(--faq-line-strong);
}

.page-faq .faq-fig-device {
  max-width: 560px;
  aspect-ratio: 5 / 4;
}

.page-faq .faq-fig-plan {
  max-width: 660px;
  aspect-ratio: 3 / 2;
  margin-left: auto;
}

@media (max-width: 719px) {
  .page-faq .faq-fig-plan {
    margin-left: 0;
  }
}

/* ---------- 收束区块 ---------- */
.page-faq .faq-next {
  background:
    radial-gradient(110% 130% at 12% 100%, rgba(23, 162, 166, .2), transparent 58%),
    linear-gradient(180deg, var(--c-night), var(--c-deep));
  padding: clamp(44px, 6vw, 78px) 0;
}

.page-faq .next-grid {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

@media (min-width: 860px) {
  .page-faq .next-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(240px, .8fr);
    align-items: center;
  }
}

.page-faq .faq-next .section-label {
  color: var(--c-gold);
  border-top-color: var(--c-gold);
}

.page-faq .next-copy h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.2vw, 36px);
  letter-spacing: -.015em;
  color: var(--ink);
  margin: 10px 0 12px;
}

.page-faq .next-copy p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--ink-dim);
  max-width: 42em;
}

.page-faq .next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 860px) {
  .page-faq .next-actions {
    justify-content: flex-end;
  }
}
<<<END>>>