.page-faq {
  --faq-cut: 14px;
  --faq-hair: rgba(47, 227, 208, 0.2);
  --faq-soft: rgba(231, 239, 236, 0.74);
  --faq-paper-soft: rgba(6, 37, 31, 0.72);
  background: var(--c-ink);
  color: var(--c-fog);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4.5vw, 52px) 0 clamp(36px, 5.5vw, 68px);
  background:
    radial-gradient(115% 85% at 84% -10%, rgba(47, 227, 208, 0.16), transparent 62%),
    linear-gradient(180deg, var(--c-deep) 0%, var(--c-ink) 68%);
  border-bottom: 1px solid var(--faq-hair);
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, transparent 8%, var(--c-cyan) 42%, var(--c-orange) 72%, transparent 96%);
  opacity: 0.85;
}
.page-faq .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(20px, 3vw, 32px);
  padding: 0;
  list-style: none;
  font-size: var(--fs-xs);
  color: var(--c-graphite);
}
.page-faq .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-mist);
}
.page-faq .breadcrumbs a {
  color: var(--c-cyan);
  text-decoration: none;
}
.page-faq .breadcrumbs a:hover {
  text-decoration: underline;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}
.page-faq .faq-hero__copy h1 {
  margin: 12px 0 16px;
  font-size: var(--fs-display);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 900;
  max-width: 19ch;
}
.page-faq .faq-hero__copy .lede {
  margin: 0;
  max-width: 56ch;
  font-size: var(--fs-md);
  line-height: 1.75;
  color: var(--faq-soft);
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-left: 11px;
  border-left: 2px solid var(--c-cyan);
  font-size: var(--fs-sm);
  color: var(--c-graphite);
}
.page-faq .faq-stats .mono {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--c-cyan-soft);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  background: var(--c-deep);
  clip-path: polygon(var(--faq-cut) 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%, 0 var(--faq-cut));
}
.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  opacity: 0.9;
}
.page-faq .faq-hero__figure figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 14px;
  background: rgba(6, 37, 31, 0.86);
  color: var(--c-cyan-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.02em;
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-body {
  padding: clamp(36px, 5.5vw, 68px) 0 clamp(44px, 6vw, 80px);
}
.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}

/* 侧边目录 */
.page-faq .faq-rail__inner {
  display: grid;
  gap: 14px;
  padding: 18px;
  background: rgba(12, 58, 49, 0.55);
  border-left: 2px solid var(--c-cyan);
  clip-path: polygon(var(--faq-cut) 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%, 0 var(--faq-cut));
}
.page-faq .faq-rail__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-graphite);
}
.page-faq .faq-rail__nav ol {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-rail__nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  color: var(--c-fog);
  font-size: var(--fs-sm);
  text-decoration: none;
  background: rgba(6, 37, 31, 0.55);
  border-left: 2px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-faq .faq-rail__nav a:hover,
.page-faq .faq-rail__nav a:focus-visible {
  background: var(--c-mist);
  border-left-color: var(--c-orange);
  color: var(--c-cyan-soft);
  transform: translateX(2px);
}
.page-faq .faq-rail__idx {
  font-size: var(--fs-xs);
  color: var(--c-cyan);
}
.page-faq .faq-rail__name {
  flex: 1 1 auto;
  min-width: 0;
}
.page-faq .faq-rail__count {
  font-size: var(--fs-xs);
  color: var(--c-graphite);
}
.page-faq .faq-rail__ticks {
  display: flex;
  gap: 4px;
}
.page-faq .faq-rail__ticks span {
  flex: 1 1 0;
  height: 3px;
  background: rgba(169, 187, 182, 0.3);
}
.page-faq .faq-rail__ticks span:nth-child(-n + 4) {
  background: var(--c-cyan);
}
.page-faq .faq-rail__note {
  margin: 0;
  font-size: var(--fs-xs);
  color: var(--c-graphite);
  line-height: 1.6;
}
.page-faq .faq-rail__cta {
  width: 100%;
  justify-content: center;
  text-align: center;
}

/* 问答流 */
.page-faq .faq-stream {
  min-width: 0;
}
.page-faq .faq-stream__filters {
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-faq .faq-group {
  margin-bottom: clamp(30px, 4vw, 52px);
  scroll-margin-top: 96px;
}
.page-faq .faq-group:last-child {
  margin-bottom: 0;
}
.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--faq-hair);
}
.page-faq .faq-group__title {
  margin: 0;
  font-size: var(--fs-h3);
  font-weight: 800;
  letter-spacing: -0.01em;
}
.page-faq .faq-group__title::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 10px;
  background: var(--c-orange);
  transform: rotate(45deg) translateY(-1px);
}
.page-faq .faq-group__count {
  margin-left: auto;
  font-size: var(--fs-xs);
  color: var(--c-graphite);
}

.page-faq .faq-group__list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  background: linear-gradient(180deg, rgba(12, 58, 49, 0.88), rgba(12, 58, 49, 0.52));
  border-left: 2px solid rgba(47, 227, 208, 0.34);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-faq .faq-item:hover {
  border-left-color: var(--c-cyan);
  transform: translateX(2px);
}
.page-faq .faq-item[open] {
  border-left-color: var(--c-orange);
  background: linear-gradient(180deg, rgba(18, 72, 61, 0.95), rgba(12, 58, 49, 0.68));
}
.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
  font-size: var(--fs-md);
  font-weight: 700;
  line-height: 1.6;
  color: var(--c-fog);
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}
.page-faq .faq-item__num {
  flex: none;
  margin-top: 2px;
  padding: 2px 6px;
  font-size: var(--fs-xs);
  color: var(--c-cyan);
  border: 1px solid rgba(47, 227, 208, 0.36);
}
.page-faq .faq-item[open] .faq-item__num {
  color: var(--c-sand);
  border-color: rgba(255, 192, 138, 0.5);
}
.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
  overflow-wrap: anywhere;
}
.page-faq .faq-item__icon {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 5px;
}
.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--c-cyan);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-faq .faq-item__icon::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
}
.page-faq .faq-item__icon::after {
  left: 8px;
  top: 0;
  width: 2px;
  height: 18px;
}
.page-faq .faq-item[open] .faq-item__icon::after {
  transform: scaleY(0);
}
.page-faq .faq-item[open] .faq-item__icon::before {
  background: var(--c-orange);
}

.page-faq .faq-item__body {
  padding: 0 18px 20px 60px;
  font-size: var(--fs-sm);
  line-height: 1.78;
  color: var(--faq-soft);
}
.page-faq .faq-item__body p {
  margin: 0 0 10px;
}
.page-faq .faq-item__body p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-item__body a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-steps-list {
  display: grid;
  gap: 8px;
  margin: 0 0 10px;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}
.page-faq .faq-steps-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  counter-increment: faqstep;
}
.page-faq .faq-steps-list li::before {
  content: counter(faqstep, decimal-leading-zero);
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--c-orange);
}

/* ---------- 订阅流程 ---------- */
.page-faq .faq-flow {
  padding: clamp(40px, 6vw, 76px) 0;
  background: linear-gradient(180deg, var(--c-deep) 0%, var(--c-ink) 100%);
  border-top: 1px solid var(--faq-hair);
  border-bottom: 1px solid var(--faq-hair);
}
.page-faq .faq-flow__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 3.4vw, 40px);
}
.page-faq .faq-flow__head h2 {
  margin: 12px 0 10px;
  font-size: var(--fs-h2);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.14;
}
.page-faq .faq-flow__head .lede {
  margin: 0;
  font-size: var(--fs-md);
  color: var(--faq-soft);
}
.page-faq .faq-flow__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 36px);
}
.page-faq .faq-flow__steps {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}
.page-faq .faq-flow__step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px;
  background: rgba(6, 37, 31, 0.62);
  border-left: 3px solid var(--c-cyan);
  clip-path: polygon(var(--faq-cut) 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%, 0 var(--faq-cut));
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-faq .faq-flow__step:hover {
  border-left-color: var(--c-orange);
  background: rgba(18, 72, 61, 0.72);
}
.page-faq .faq-flow__num {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--c-cyan);
  line-height: 1;
}
.page-faq .faq-flow__text h3 {
  margin: 0 0 6px;
  font-size: var(--fs-lg);
  font-weight: 800;
}
.page-faq .faq-flow__text p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--faq-soft);
}

.page-faq .faq-flow__compare {
  align-self: start;
  padding: 22px;
  background: rgba(18, 72, 61, 0.5);
  border-top: 2px solid var(--c-orange);
}
.page-faq .faq-compare__row {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) 46px;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}
.page-faq .faq-compare__label {
  font-size: var(--fs-xs);
  color: var(--c-graphite);
}
.page-faq .faq-compare__bar {
  display: block;
  height: 10px;
  background: rgba(169, 187, 182, 0.18);
}
.page-faq .faq-compare__fill {
  display: block;
  height: 100%;
}
.page-faq .faq-compare__fill--old {
  width: 100%;
  background: var(--c-graphite);
}
.page-faq .faq-compare__fill--new {
  width: 60%;
  background: var(--c-orange);
}
.page-faq .faq-compare__value {
  font-size: var(--fs-xs);
  color: var(--c-cyan-soft);
  text-align: right;
}
.page-faq .faq-flow__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--faq-hair);
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--faq-soft);
}

/* ---------- 反馈通道（暖纸区） ---------- */
.page-faq .faq-feedback {
  padding: clamp(44px, 6.5vw, 84px) 0;
  background: var(--c-paper);
  color: var(--c-ink);
}
.page-faq .faq-feedback__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 48px);
  align-items: center;
}
.page-faq .faq-feedback__figure {
  position: relative;
  margin: 0;
  background: var(--c-ink);
  clip-path: polygon(var(--faq-cut) 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%, 0 var(--faq-cut));
}
.page-faq .faq-feedback__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.page-faq .faq-feedback__body .eyebrow {
  color: var(--c-mist);
}
.page-faq .faq-feedback__body h2 {
  margin: 12px 0 14px;
  font-size: var(--fs-h2);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.14;
  color: var(--c-ink);
}
.page-faq .faq-feedback__lede {
  margin: 0;
  max-width: 58ch;
  font-size: var(--fs-md);
  line-height: 1.8;
  color: var(--faq-paper-soft);
}

.page-faq .faq-timeline {
  display: grid;
  gap: 0;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-timeline li {
  position: relative;
  padding: 0 0 20px 26px;
  border-left: 1px solid rgba(6, 37, 31, 0.2);
}
.page-faq .faq-timeline li:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}
.page-faq .faq-timeline li::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--c-orange);
  transform: rotate(45deg);
}
.page-faq .faq-timeline h3 {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--c-ink);
}
.page-faq .faq-timeline p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--faq-paper-soft);
}

.page-faq .faq-feedback__more {
  margin: 24px 0 0;
  padding: 12px 16px;
  font-size: var(--fs-sm);
  line-height: 1.7;
  background: var(--c-sand);
  color: var(--c-ink);
  border-left: 3px solid var(--c-orange);
}
.page-faq .faq-feedback__more a {
  color: var(--c-ink);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 升级路径 ---------- */
.page-faq .faq-escalate {
  padding: clamp(40px, 6vw, 76px) 0 clamp(48px, 7vw, 88px);
  background: linear-gradient(180deg, var(--c-ink) 0%, var(--c-deep) 100%);
}
.page-faq .faq-escalate__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 3.4vw, 40px);
}
.page-faq .faq-escalate__head h2 {
  margin: 12px 0 10px;
  font-size: var(--fs-h2);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.14;
}
.page-faq .faq-escalate__head p {
  margin: 0;
  font-size: var(--fs-md);
  line-height: 1.78;
  color: var(--faq-soft);
}
.page-faq .faq-escalate__cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}
.page-faq .faq-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  background: rgba(12, 58, 49, 0.58);
  border-left: 2px solid var(--c-cyan);
  clip-path: polygon(var(--faq-cut) 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%, 0 var(--faq-cut));
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-faq .faq-contact:hover {
  border-left-color: var(--c-orange);
  transform: translateY(-4px);
}
.page-faq .faq-contact h3 {
  margin: 0;
  font-size: var(--fs-lg);
  font-weight: 800;
}
.page-faq .faq-contact__value {
  margin: 0;
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--c-cyan-soft);
  overflow-wrap: anywhere;
}
.page-faq .faq-contact__desc {
  margin: 0 0 6px;
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: var(--faq-soft);
}
.page-faq .faq-contact .btn {
  align-self: flex-start;
}
.page-faq .faq-escalate__note {
  margin: 24px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--c-graphite);
}
.page-faq .faq-escalate__note a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-escalate__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-faq .faq-hero__figure {
    align-self: end;
  }
  .page-faq .faq-flow__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }
  .page-faq .faq-feedback__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 288px minmax(0, 1fr);
  }
  .page-faq .faq-rail__inner {
    position: sticky;
    top: 96px;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-item__body {
    padding-left: 18px;
  }
  .page-faq .faq-item summary {
    padding: 14px;
    gap: 10px;
    font-size: var(--fs-sm);
  }
  .page-faq .faq-flow__num {
    font-size: 1.25rem;
  }
  .page-faq .faq-compare__row {
    grid-template-columns: 54px minmax(0, 1fr) 42px;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-rail__nav a,
  .page-faq .faq-contact,
  .page-faq .faq-flow__step,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after {
    transition: none;
  }
  .page-faq .faq-item:hover,
  .page-faq .faq-rail__nav a:hover,
  .page-faq .faq-contact:hover {
    transform: none;
  }
}