.page-faq {
  --faq-panel: rgba(28, 43, 69, 0.62);
  --faq-shadow: 6px 6px 0 rgba(0, 0, 0, 0.5);
  display: block;
  background: var(--ink-0);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 4vw, 40px) 0 clamp(32px, 6vw, 64px);
  background:
    radial-gradient(110% 80% at 88% -20%, rgba(22, 217, 227, 0.18), transparent 62%),
    radial-gradient(90% 70% at 4% 0%, rgba(232, 53, 46, 0.2), transparent 60%),
    linear-gradient(180deg, var(--ink-1), var(--ink-0));
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero__glow {
  position: absolute;
  right: -12%;
  top: -30%;
  width: 60vw;
  max-width: 620px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(22, 217, 227, 0.16), transparent 68%);
  pointer-events: none;
  z-index: 0;
}

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

.page-faq .breadcrumb-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(18px, 3vw, 30px);
  padding: 0;
  font-size: 13px;
  color: var(--muted);
}

.page-faq .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-strong);
}

.page-faq .breadcrumb-list a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .breadcrumb-list a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-faq .faq-hero__eyebrow {
  display: inline-block;
  margin: 0 0 16px;
  padding: 5px 12px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--lime);
  border: 1px solid rgba(183, 243, 74, 0.4);
  background: rgba(183, 243, 74, 0.07);
}

.page-faq .faq-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-size: clamp(30px, 6.4vw, 54px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-hero h1::after {
  content: "";
  display: block;
  width: 72px;
  height: 4px;
  margin-top: 20px;
  background: linear-gradient(90deg, var(--brand), var(--cyan));
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.9;
  color: var(--muted);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

/* 图片容器 */
.page-faq .faq-shot {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--ink-2);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.9) brightness(0.82) contrast(1.06);
}

.page-faq .faq-shot--hero {
  aspect-ratio: 21 / 9;
}

.page-faq .faq-shot--hero img {
  height: 100%;
}

.page-faq .faq-shot--device {
  aspect-ratio: 16 / 9;
}

.page-faq .faq-shot--device img {
  height: 100%;
}

/* 首屏索引 */
.page-faq .faq-index {
  list-style: none;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 100%;
  padding: 14px 16px;
  background: var(--faq-panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  color: var(--paper);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.28s var(--ease), border-left-color 0.28s var(--ease), transform 0.28s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--ink-2);
  border-left-color: var(--cyan);
  transform: translateY(-3px);
}

.page-faq .faq-index__num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

/* ---------- 章节通用 ---------- */
.page-faq .section-index {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq .section-title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(23px, 4.4vw, 36px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-faq .section-lead {
  margin: 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
}

/* ---------- 三步入门 ---------- */
.page-faq .faq-steps__list {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  counter-reset: stepc;
}

.page-faq .step-card {
  position: relative;
  padding: clamp(22px, 3.4vw, 32px);
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand);
  box-shadow: var(--faq-shadow);
  overflow: hidden;
}

.page-faq .step-card::after {
  content: "";
  position: absolute;
  right: -46px;
  bottom: -56px;
  width: 130px;
  height: 130px;
  border: 1px solid rgba(22, 217, 227, 0.22);
  border-radius: 50%;
  pointer-events: none;
}

.page-faq .step-card__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(38px, 7vw, 56px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--cyan);
  margin-bottom: 14px;
}

.page-faq .step-card__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(17px, 2.6vw, 20px);
  font-weight: 800;
  color: var(--paper);
}

.page-faq .step-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .step-card__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(22, 217, 227, 0.45);
}

.page-faq .step-card__text a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 换设备 ---------- */
.page-faq .faq-device__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-faq .faq-device__lead {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
}

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

.page-faq .device-step {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  background: var(--faq-panel);
  border: 1px solid var(--line);
}

.page-faq .device-step__key {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--lime);
  padding-top: 4px;
}

.page-faq .device-step__body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
}

.page-faq .faq-device__note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--amber);
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 筛选说明 ---------- */
.page-faq .faq-filter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-faq .filter-panel {
  padding: clamp(20px, 3vw, 28px);
  background: linear-gradient(150deg, rgba(22, 217, 227, 0.1), transparent 62%), var(--ink-1);
  border: 1px solid var(--line);
}

.page-faq .filter-panel__label {
  margin: 0 0 16px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .filter-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0;
}

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

.page-faq .filter-notes li {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  padding-left: 14px;
  border-left: 2px solid var(--line-strong);
}

.page-faq .filter-notes strong {
  color: var(--paper);
}

.page-faq .faq-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--ink-2);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-table thead th {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.13em;
  color: var(--cyan);
  background: rgba(22, 217, 227, 0.08);
  white-space: nowrap;
}

.page-faq .faq-table td {
  color: var(--muted);
  line-height: 1.75;
}

.page-faq .faq-table tbody td:first-child {
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--paper);
  white-space: nowrap;
}

.page-faq .faq-table tbody td:last-child {
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--cyan-soft);
}

.page-faq .faq-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .faq-table tbody tr:hover td {
  background: rgba(22, 217, 227, 0.045);
}

.page-faq .faq-filter__foot {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 72ch;
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
  padding-left: 14px;
  border-left: 3px solid var(--cyan);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 38px);
}

.page-faq .faq-item {
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-left: 4px solid var(--line-strong);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--lime);
  background: linear-gradient(180deg, rgba(183, 243, 74, 0.07), transparent 62%), var(--ink-1);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 58px;
  padding: 16px clamp(16px, 3vw, 24px);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: clamp(15.5px, 2.4vw, 17.5px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
  transition: color 0.25s var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--cyan-soft);
}

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

.page-faq .faq-item__dot {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--line-strong);
  transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-faq .faq-item[open] .faq-item__dot {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(183, 243, 74, 0.16), 0 0 14px rgba(183, 243, 74, 0.65);
}

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

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.3s var(--ease), background 0.3s 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(--lime);
}

.page-faq .faq-item__a {
  padding: 0 clamp(16px, 3vw, 24px) 22px 44px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

.page-faq .faq-item__a p {
  margin: 0;
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(22, 217, 227, 0.45);
}

.page-faq .faq-item__a a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-questions__more {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-questions__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(22, 217, 227, 0.45);
}

/* ---------- 联系 ---------- */
.page-faq .faq-contact__panel {
  position: relative;
  padding: clamp(24px, 4vw, 44px);
  background: linear-gradient(140deg, rgba(232, 53, 46, 0.16), transparent 58%), var(--ink-1);
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-contact__lead {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--muted);
}

.page-faq .reach-list {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .reach-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 14px 16px;
  background: var(--ink-0);
  border: 1px solid var(--line);
}

.page-faq .reach-key {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .reach-val {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .reach-val--num {
  font-family: var(--font-num);
  letter-spacing: 0.06em;
  color: var(--lime);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-filter__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-faq .faq-item__a {
    padding-left: clamp(20px, 3vw, 32px);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-faq .faq-index {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .faq-steps__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .step-card:nth-child(2) {
    transform: translateY(20px);
  }

  .page-faq .step-card:nth-child(3) {
    transform: translateY(40px);
  }

  .page-faq .faq-device__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }

  .page-faq .faq-device__text {
    padding-left: 8px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-index__link {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-item__dot,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after,
  .page-faq .step-card {
    transition: none;
    transform: none;
  }
}