/* ===== 常见问题页（.page-faq） ===== */
.page-faq {
  --faq-rule: rgba(59, 58, 54, .22);
  --faq-rule-soft: rgba(59, 58, 54, .14);
  --faq-deep-text: rgba(243, 238, 226, .84);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  padding: 18px 0 clamp(56px, 8vw, 104px);
}

/* --- 页首 --- */
.page-faq .faq-intro {
  max-width: 46rem;
  margin: 12px 0 clamp(26px, 4vw, 42px);
}

.page-faq .faq-intro h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(42px, 10vw, 78px);
  line-height: 1.04;
  letter-spacing: -0.01em;
  transform: scaleX(.96);
  transform-origin: left center;
}

.page-faq .faq-intro__lead {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .faq-intro__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--graphite);
}

.page-faq .faq-intro__meta li {
  position: relative;
  padding-left: 12px;
}

.page-faq .faq-intro__meta li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 6px;
  height: 2px;
  background: var(--ember);
  transform: rotate(-8deg);
}

/* --- 主体两栏 --- */
.page-faq .faq-body {
  display: block;
}

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

/* --- 分组索引栏 --- */
.page-faq .faq-rail {
  margin: 0 0 30px;
}

.page-faq .faq-rail__title {
  display: none;
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--graphite);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 2px 0 10px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  padding: 8px 13px;
  font-size: 13px;
  color: var(--graphite);
  text-decoration: none;
  background: var(--paper-lift);
  border: 1px solid var(--faq-rule-soft);
}

.page-faq .faq-rail__link .og-mono {
  color: var(--ember);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--ink);
  border-color: var(--ember);
}

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

.page-faq .faq-rail__note {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--graphite);
}

/* --- 图片 --- */
.page-faq .faq-figure {
  margin: 0 0 clamp(30px, 4vw, 46px);
}

.page-faq .faq-figure--tight {
  margin-bottom: 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--paper-lift);
  border: 1px solid var(--faq-rule-soft);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--graphite);
}

/* --- 分组 --- */
.page-faq .faq-group {
  margin-top: clamp(34px, 5vw, 56px);
  scroll-margin-top: 96px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-faq .faq-group__num {
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--ember);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.2;
}

.page-faq .faq-group__count {
  margin-left: auto;
  font-size: 12px;
  color: var(--graphite);
}

.page-faq .faq-slash {
  display: block;
  width: 76px;
  height: 2px;
  margin: 14px 0 4px;
  background: var(--ember);
  transform: rotate(-6deg);
  transform-origin: left center;
}

.page-faq .faq-group:target .faq-group__num {
  color: var(--signal);
}

/* --- 问答条目 --- */
.page-faq .faq-item {
  position: relative;
  padding: 20px 0 4px;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 2px;
  background: var(--mist);
  transform: rotate(-6deg);
  transform-origin: left center;
}

.page-faq .faq-item[open]::before {
  background: var(--ember);
}

.page-faq .faq-item__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 4px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__head:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 4px;
}

.page-faq .faq-item__no {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-size: 13px;
  line-height: 1.3;
  color: var(--graphite);
  clip-path: polygon(0 0, calc(100% - 5px) 0, 100% 5px, 100% 100%, 0 100%);
}

.page-faq .faq-item__no::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--mist);
}

.page-faq .faq-item[open] .faq-item__no {
  background: var(--ink);
  color: var(--paper-lift);
}

.page-faq .faq-item[open] .faq-item__no::before {
  background: var(--volt);
}

.page-faq .faq-item__q {
  font-size: 17px;
  font-weight: 500;
  line-height: 1.6;
}

.page-faq .faq-item__head:hover .faq-item__q {
  color: var(--ember);
}

.page-faq .faq-item__body {
  padding: 8px 0 4px 38px;
}

.page-faq .faq-item__body p {
  margin: 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
}

/* --- 索引栏说明 --- */
.page-faq .faq-howto {
  margin-top: clamp(44px, 6vw, 76px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--faq-rule-soft);
  scroll-margin-top: 96px;
}

.page-faq .faq-howto__grid {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-faq .faq-howto__text p {
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.78;
}

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

.page-faq .faq-schema {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

/* --- 排查顺序（深色面板） --- */
.page-faq .faq-triage {
  margin-top: clamp(44px, 6vw, 76px);
  padding: clamp(26px, 4.4vw, 48px);
  background: var(--arena);
  color: var(--paper-lift);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
  scroll-margin-top: 96px;
}

.page-faq .faq-triage__eyebrow {
  margin: 0;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--volt);
}

.page-faq .faq-triage h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.25;
  color: var(--paper-lift);
}

.page-faq .faq-triage__lead {
  margin: 12px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-deep-text);
}

.page-faq .faq-steps {
  display: grid;
  gap: 26px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps__item {
  position: relative;
  padding-left: 26px;
}

.page-faq .faq-steps__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: -16px;
  width: 2px;
  background: repeating-linear-gradient(180deg, rgba(200, 193, 178, .58) 0 6px, transparent 6px 12px);
}

.page-faq .faq-steps__item:last-child::before {
  bottom: auto;
  height: 22px;
}

.page-faq .faq-steps__item::after {
  content: "";
  position: absolute;
  left: -3px;
  bottom: -14px;
  width: 8px;
  height: 8px;
  background: var(--volt);
}

.page-faq .faq-steps__no {
  display: block;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--volt);
}

.page-faq .faq-steps__item h3 {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.35;
  color: var(--paper-lift);
}

.page-faq .faq-steps__item p {
  margin: 0;
  max-width: 32em;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--faq-deep-text);
}

.page-faq .faq-triage__note {
  margin: 28px 0 0;
  padding-top: 18px;
  border-top: 1px dashed rgba(200, 193, 178, .38);
  max-width: 40em;
  font-size: 15px;
  line-height: 1.72;
  color: var(--faq-deep-text);
}

/* --- 升级入口 --- */
.page-faq .faq-upgrade {
  margin-top: clamp(44px, 6vw, 76px);
  scroll-margin-top: 96px;
}

.page-faq .faq-upgrade__grid {
  display: grid;
  gap: 28px;
  margin-top: 22px;
}

.page-faq .faq-upgrade__grid p {
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.78;
}

.page-faq .faq-upgrade__steps {
  margin: 0 0 1.4em;
  padding: 0;
  list-style: none;
  counter-reset: faq-up;
}

.page-faq .faq-upgrade__steps li {
  position: relative;
  counter-increment: faq-up;
  padding: 0 0 14px 30px;
  font-size: 16px;
  line-height: 1.72;
}

.page-faq .faq-upgrade__steps li::before {
  content: "0" counter(faq-up);
  position: absolute;
  left: 0;
  top: .1em;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ember);
}

.page-faq .faq-upgrade .og-btn {
  display: inline-block;
  text-decoration: none;
}

/* --- 联系区块 --- */
.page-faq .faq-contact {
  margin-top: clamp(44px, 6vw, 76px);
  padding: clamp(26px, 4.4vw, 48px);
  background: var(--ink);
  color: var(--paper-lift);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
  scroll-margin-top: 96px;
}

.page-faq .faq-contact h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.25;
  color: var(--paper-lift);
}

.page-faq .faq-contact__lead {
  margin: 12px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-deep-text);
}

.page-faq .faq-seg {
  display: inline-flex;
  gap: 4px;
  margin: 22px 0 20px;
  padding: 4px;
  background: rgba(243, 238, 226, .1);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-faq .faq-seg__btn {
  border: 0;
  padding: 8px 16px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--paper-lift);
  background: transparent;
  cursor: pointer;
}

.page-faq .faq-seg__btn[aria-selected="true"] {
  background: var(--volt);
  color: var(--ink);
  font-weight: 700;
}

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

.page-faq .faq-panel {
  display: none;
}

.page-faq .faq-panel.is-active {
  display: block;
}

.page-faq .faq-channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  margin: 0 0 16px;
}

.page-faq .faq-channels dt {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-faq .faq-channels dd {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--paper-lift);
}

.page-faq .faq-channels dd.og-mono {
  font-size: 15px;
  letter-spacing: .02em;
}

.page-faq .faq-contact__note {
  margin: 0;
  max-width: 38em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: 14px 0 0;
}

.page-faq .faq-contact__links a {
  font-size: 14px;
  color: var(--paper-lift);
  text-decoration: none;
  border-bottom: 1px solid var(--ember);
  padding-bottom: 2px;
}

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

.page-faq .faq-contact__links a:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 3px;
}

/* --- 窄屏微调 --- */
@media (max-width: 640px) {
  .page-faq .faq-item__head {
    gap: 10px;
  }

  .page-faq .faq-item__q {
    font-size: 16px;
  }

  .page-faq .faq-item__body {
    padding-left: 18px;
  }

  .page-faq .faq-group__count {
    display: none;
  }
}

/* --- 桌面两栏 + 横向轨迹 --- */
@media (min-width: 1024px) {
  .page-faq .faq-body {
    display: grid;
    grid-template-columns: 212px minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 68px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: var(--sticky-top);
    margin: 0;
  }

  .page-faq .faq-rail__title {
    display: block;
  }

  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--faq-rule-soft);
  }

  .page-faq .faq-rail__link {
    display: flex;
    gap: 9px;
    padding: 10px 12px;
    margin-left: -1px;
    background: none;
    border: 0;
    border-left: 2px solid transparent;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--ember);
    background: rgba(220, 85, 35, .07);
  }

  .page-faq .faq-howto__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: center;
  }

  .page-faq .faq-upgrade__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: start;
  }

  .page-faq .faq-channels {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 8px 22px;
    align-items: baseline;
  }

  .page-faq .faq-channels dd {
    margin-bottom: 0;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }

  .page-faq .faq-steps__item {
    padding: 30px 0 0;
  }

  .page-faq .faq-steps__item::before {
    left: 0;
    right: -32px;
    top: 12px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: repeating-linear-gradient(90deg, rgba(200, 193, 178, .58) 0 6px, transparent 6px 12px);
  }

  .page-faq .faq-steps__item:last-child::before {
    right: 0;
  }

  .page-faq .faq-steps__item::after {
    left: auto;
    right: -3px;
    top: 9px;
    bottom: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition: none !important;
  }
}