.page-faq {
  --faq-rule: rgba(26, 37, 48, .18);
  --faq-rule-dark: rgba(240, 230, 210, .2);
  background: var(--ink);
  color: var(--cream);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq .faq-wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-faq h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.1;
  letter-spacing: -.01em;
  margin: 6px 0 12px;
}

.page-faq h3 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.3;
}

.page-faq .faq-sec-head {
  max-width: 800px;
  margin-bottom: clamp(22px, 3.4vw, 40px);
}

.page-faq .faq-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--gray);
  margin: 0;
}

.page-faq .faq-aside {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

.page-faq .faq-aside a {
  color: var(--cyan-2);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .faq-aside--dark {
  color: rgba(240, 230, 210, .75);
}

.page-faq .faq-aside--dark a {
  color: var(--cyan);
}

.page-faq .faq-switch .faq-lead,
.page-faq .faq-timeline .faq-lead {
  color: rgba(240, 230, 210, .78);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(20px, 3.5vw, 40px) clamp(44px, 7vw, 88px);
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(240, 230, 210, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(240, 230, 210, .07) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 84%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 84%);
}

.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .crumbs a {
  color: rgba(240, 230, 210, .7);
  text-decoration: none;
}

.page-faq .crumbs a:hover {
  color: var(--cyan);
}

.page-faq .crumbs span {
  color: rgba(240, 230, 210, .55);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7.2vw, 76px);
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--cream);
  margin: 6px 0 18px;
  max-width: 17ch;
}

.page-faq .faq-hero-lead {
  max-width: 58ch;
  margin: 0 0 clamp(22px, 3vw, 32px);
  font-size: 17px;
  line-height: 1.85;
  color: rgba(240, 230, 210, .82);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cream);
  background: rgba(240, 230, 210, .06);
  border: 1px solid rgba(240, 230, 210, .22);
  clip-path: var(--cut-sm);
  text-decoration: none;
  transition: border-color .18s var(--ease), color .18s var(--ease), transform .18s var(--ease);
}

.page-faq .faq-jump a:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateX(2px);
}

.page-faq .faq-jump .num {
  color: var(--accent);
}

/* ---------- 速查索引 ---------- */
.page-faq .faq-index {
  background-color: var(--paper);
  background-image: repeating-linear-gradient(0deg, rgba(26, 37, 48, .045) 0, rgba(26, 37, 48, .045) 1px, transparent 1px, transparent 7px);
  color: var(--text);
  padding-block: clamp(40px, 6vw, 80px);
}

.page-faq .faq-index .eyebrow {
  color: var(--accent-2);
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}

.page-faq .faq-filter button {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  padding: 9px 15px 8px;
  color: var(--text);
  background: var(--paper-2);
  border: 1px solid rgba(26, 37, 48, .26);
  clip-path: var(--cut-sm);
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-filter button:hover {
  border-color: var(--cyan-2);
}

.page-faq .faq-filter button[aria-pressed="true"],
.page-faq .faq-filter button.is-active {
  background: var(--accent);
  border-color: var(--accent-2);
  color: var(--cream);
}

.page-faq .filter-status {
  margin: 0 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray);
}

.page-faq .faq-keys {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid rgba(26, 37, 48, .22);
}

.page-faq .faq-keys > li {
  border-bottom: 1px solid rgba(26, 37, 48, .16);
  min-width: 0;
}

.page-faq .faq-keys [hidden] {
  display: none;
}

.page-faq .faq-keys a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 15px 4px 14px 2px;
  color: var(--text);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.page-faq .faq-keys a:hover {
  border-left-color: var(--cyan-2);
  transform: translateX(3px);
}

.page-faq .faq-keys .num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

.page-faq .faq-key-title {
  font-size: 16px;
  line-height: 1.5;
}

.page-faq .faq-keys .tag {
  font-size: 11px;
  white-space: nowrap;
}

/* ---------- 步骤区 ---------- */
.page-faq .faq-reg,
.page-faq .faq-dl,
.page-faq .faq-tips {
  background: var(--paper-3);
  color: var(--text);
  padding-block: clamp(36px, 5.4vw, 74px);
  border-top: 1px solid rgba(26, 37, 48, .12);
}

.page-faq .faq-steps-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 2vw, 18px);
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: clamp(12px, 2vw, 20px);
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--paper);
  border-left: 3px solid var(--accent);
  clip-path: var(--cut-sm);
}

.page-faq .faq-step .num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--accent);
  padding-top: 3px;
}

.page-faq .faq-step h3 {
  font-size: 19px;
  margin: 0 0 8px;
}

.page-faq .faq-step-body {
  min-width: 0;
}

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

.page-faq .faq-step-body p + p {
  margin-top: 8px;
}

.page-faq .faq-more {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed rgba(26, 37, 48, .28);
}

.page-faq .faq-more summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan-2);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-more summary::before {
  content: "＋";
  color: var(--accent);
}

.page-faq .faq-more[open] summary::before {
  content: "－";
}

.page-faq .faq-more p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--gray);
}

.page-faq .faq-figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

.page-faq .faq-figure img,
.page-faq .faq-tl-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(26, 37, 48, .2);
}

.page-faq .frame-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 版本面板 ---------- */
.page-faq .faq-version {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
}

.page-faq .faq-version-panel {
  padding: clamp(16px, 2.4vw, 26px);
  background: var(--paper);
  border-top: 3px solid var(--cyan-2);
  clip-path: var(--cut-lg);
}

.page-faq .faq-version-panel .tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  margin: 0 0 16px;
}

/* ---------- 设备提示 ---------- */
.page-faq .faq-tip-grid {
  display: grid;
  gap: clamp(14px, 2.2vw, 22px);
}

.page-faq .faq-tip {
  padding: clamp(16px, 2.2vw, 22px);
  background: var(--paper);
  clip-path: var(--cut-sm);
}

.page-faq .faq-tip h3 {
  font-size: 18px;
  margin: 0 0 8px;
}

.page-faq .faq-tip p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--gray);
}

/* ---------- 两版切换 ---------- */
.page-faq .faq-switch {
  position: relative;
  background: var(--ink-2);
  color: var(--cream);
  padding-block: clamp(44px, 6vw, 88px) clamp(60px, 8vw, 110px);
}

.page-faq .faq-switch::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: clamp(24px, 4vw, 46px);
  background: var(--ink);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

.page-faq .faq-switch .eyebrow {
  color: var(--cyan);
}

.page-faq .faq-switch .faq-step {
  background: rgba(240, 230, 210, .06);
  border-left-color: var(--cyan);
}

.page-faq .faq-switch .faq-step .num {
  color: var(--cyan);
}

.page-faq .faq-switch .faq-step h3 {
  color: var(--cream);
}

.page-faq .faq-switch .faq-step-body p {
  color: rgba(240, 230, 210, .8);
}

.page-faq .faq-switch .faq-more {
  border-top-color: rgba(240, 230, 210, .24);
}

.page-faq .faq-switch .faq-more summary {
  color: var(--cyan);
}

.page-faq .faq-switch .faq-more p {
  color: rgba(240, 230, 210, .74);
}

.page-faq .faq-compare {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3.4vw, 38px);
  background: rgba(240, 230, 210, .22);
}

.page-faq .faq-compare > div {
  background: var(--ink-2);
  padding: clamp(16px, 2.4vw, 26px);
}

.page-faq .faq-compare h3 {
  font-size: 20px;
  margin: 0 0 12px;
  color: var(--cream);
}

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

.page-faq .faq-compare li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(240, 230, 210, .8);
}

.page-faq .faq-compare li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* ---------- 时间轴 ---------- */
.page-faq .faq-timeline {
  background-color: var(--ink);
  background-image:
    linear-gradient(to right, rgba(240, 230, 210, .05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(240, 230, 210, .05) 1px, transparent 1px);
  background-size: 56px 56px;
  color: var(--cream);
  padding-block: clamp(48px, 7vw, 96px);
}

.page-faq .faq-timeline .eyebrow {
  color: var(--cyan);
}

.page-faq .faq-tl-grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-faq .faq-tl-list {
  display: grid;
  gap: clamp(20px, 2.8vw, 30px);
  min-width: 0;
}

.page-faq .faq-change {
  padding-bottom: clamp(20px, 2.8vw, 30px);
  border-bottom: 1px solid rgba(240, 230, 210, .16);
}

.page-faq .faq-change:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-date {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-faq .faq-change h3 {
  font-size: 20px;
  margin: 8px 0 10px;
  color: var(--cream);
}

.page-faq .faq-change p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(240, 230, 210, .78);
}

.page-faq .faq-tl-figure {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 340px;
}

.page-faq .faq-tl-figure img {
  border-color: rgba(240, 230, 210, .22);
}

.page-faq .faq-tl-figure .frame-caption {
  color: rgba(240, 230, 210, .65);
}

.page-faq .faq-tl-rail {
  position: relative;
  display: grid;
  gap: 16px;
  align-content: start;
  padding-left: 24px;
  border-left: 1px solid rgba(240, 230, 210, .22);
}

.page-faq .faq-tl-rail .eyebrow {
  color: rgba(240, 230, 210, .6);
  margin-bottom: 4px;
}

.page-faq .faq-tl-rail a {
  position: relative;
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: rgba(240, 230, 210, .7);
  text-decoration: none;
  transition: color .18s var(--ease);
}

.page-faq .faq-tl-rail a::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 5px;
  width: 9px;
  height: 9px;
  background: rgba(240, 230, 210, .45);
  transform: rotate(45deg);
  transition: background .18s var(--ease);
}

.page-faq .faq-tl-rail a:hover {
  color: var(--cream);
}

.page-faq .faq-tl-rail a:hover::before {
  background: var(--cyan);
}

.page-faq .faq-tl-rail a[aria-current="true"] {
  color: var(--cream);
}

.page-faq .faq-tl-rail a[aria-current="true"]::before {
  background: var(--accent);
}

/* ---------- 联系收尾 ---------- */
.page-faq .faq-help {
  background: var(--paper);
  color: var(--text);
  padding-block: clamp(44px, 6vw, 88px);
}

.page-faq .faq-help-grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

.page-faq .faq-contact-card {
  padding: clamp(20px, 3vw, 32px);
  background: var(--ink);
  color: var(--cream);
  clip-path: var(--cut-lg);
}

.page-faq .faq-contact-card .eyebrow {
  color: var(--cyan);
}

.page-faq .faq-mail {
  margin: 10px 0 16px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 19px);
  line-height: 1.5;
  color: var(--cyan);
  word-break: break-all;
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.page-faq .faq-contact-meta {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(240, 230, 210, .78);
}

.page-faq .faq-contact-meta + .faq-contact-meta {
  margin-top: 8px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-keys {
    grid-template-columns: 1fr 1fr;
    column-gap: clamp(24px, 4vw, 56px);
  }

  .page-faq .faq-compare {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-tip-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-help-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-tl-grid {
    grid-template-columns: minmax(0, 1fr) 250px;
    align-items: start;
  }

  .page-faq .faq-tl-rail {
    position: sticky;
    top: 96px;
  }
}

@media (max-width: 520px) {
  .page-faq .faq-step {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }

  .page-faq .filter-status {
    margin-left: 0;
    width: 100%;
  }

  .page-faq .faq-tl-figure {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-keys a,
  .page-faq .faq-jump a,
  .page-faq .faq-filter button,
  .page-faq .faq-tl-rail a::before {
    transition: none;
  }

  .page-faq .faq-keys a:hover {
    transform: none;
  }
}
</main>