.page-faq {
  --faq-text: #E5E9F0;
  --faq-text-muted: #A8B3C7;
  --faq-line: rgba(229, 233, 240, 0.14);
  background:
    radial-gradient(circle at 12% 8%, rgba(255, 106, 0, 0.07), transparent 26rem),
    linear-gradient(180deg, #0B1A3A 0%, #10244F 55%, #16337A 130%);
  color: var(--faq-text);
  overflow-x: hidden;
}

.page-faq .faq-shell {
  padding-top: clamp(2rem, 6vw, 4.5rem);
  padding-bottom: clamp(4rem, 10vw, 7.5rem);
}

/* 首屏 Hero */
.page-faq .faq-hero {
  position: relative;
  margin-bottom: clamp(3.5rem, 9vw, 7rem);
}

.page-faq .faq-hero::before {
  content: "FAQ";
  position: absolute;
  top: -1rem;
  right: 0;
  z-index: 0;
  font-family: var(--font-mono);
  font-size: clamp(4rem, 12vw, 8rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(229, 233, 240, 0.15);
  pointer-events: none;
}

.page-faq .faq-hero .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 1.5rem;
}

.page-faq .faq-title {
  position: relative;
  z-index: 1;
  max-width: 12em;
  margin-bottom: 1.25rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.25rem, 9vw, 4.5rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--c-white);
}

.page-faq .faq-lead {
  position: relative;
  z-index: 1;
  max-width: 36rem;
  margin-bottom: 2rem;
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--c-silver);
}

/* 搜索区 */
.page-faq .faq-search {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0.6rem;
  max-width: 44rem;
}

.page-faq .faq-search-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.page-faq .faq-search-input {
  width: 100%;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(229, 233, 240, 0.2);
  border-radius: 999px;
  color: var(--c-white);
  font-family: var(--font-mono);
  font-size: 1rem;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-search-input::placeholder {
  color: #7A88A8;
}

.page-faq .faq-search-input:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(255, 106, 0, 0.22);
}

.page-faq .faq-search-hint {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-slate);
}

/* 快捷标签 */
.page-faq .faq-shortcuts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-shortcuts a {
  text-decoration: none;
}

/* 01 故障代码速查表 */
.page-faq .faq-code-layout {
  display: grid;
  gap: 2rem;
  margin-top: clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-code-side {
  display: grid;
  gap: 1.25rem;
  align-content: start;
  min-width: 0;
}

.page-faq .faq-code-index {
  padding: 1.25rem;
  background: rgba(11, 26, 58, 0.6);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
}

.page-faq .faq-code-index-label {
  display: block;
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.page-faq .faq-code-index-list {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-code-index-list li a {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--faq-text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-code-index-list li a:hover {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
}

.page-faq .faq-device-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background: linear-gradient(145deg, #16337A, #0B1A3A);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: 0 24px 60px -32px rgba(0, 0, 0, 0.6);
}

.page-faq .faq-device-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-side-note {
  margin: 0;
  padding-left: 0.875rem;
  border-left: 2px solid var(--c-accent);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--c-slate);
}

.page-faq .faq-code-cards {
  display: grid;
  gap: 1.25rem;
  min-width: 0;
}

.page-faq .faq-code-card {
  padding: 1.25rem;
  background: rgba(22, 51, 122, 0.45);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-code-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px -28px rgba(0, 0, 0, 0.7);
}

.page-faq .faq-code-head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.875rem;
}

.page-faq .faq-code-badge {
  padding: 0.25rem 0.85rem;
  background: rgba(255, 106, 0, 0.12);
  border: 1px solid rgba(255, 106, 0, 0.35);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  color: var(--c-accent);
}

.page-faq .faq-code-cat {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faq-text-muted);
}

.page-faq .faq-code-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.125rem;
  line-height: 1.45;
  color: var(--c-white);
}

.page-faq .faq-code-desc {
  margin: 0 0 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--faq-text-muted);
}

.page-faq .faq-answer {
  border-top: 1px solid var(--faq-line);
  padding-top: 0.5rem;
}

.page-faq .faq-answer summary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--c-accent);
}

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

.page-faq .faq-answer summary::before {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 1em;
  color: var(--c-accent);
  transition: transform 0.25s var(--ease);
}

.page-faq .faq-answer[open] summary::before {
  transform: rotate(45deg);
}

.page-faq .faq-answer ol {
  margin: 0.25rem 0 0.5rem;
  padding-left: 1.3rem;
  font-family: var(--font-body);
  line-height: 1.8;
  color: var(--faq-text);
}

.page-faq .faq-answer li {
  margin-bottom: 0.5rem;
}

.page-faq .faq-answer[open] > *:not(summary) {
  animation: faq-rise-10911 0.3s var(--ease) both;
}

@keyframes faq-rise-10911 {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-more-codes {
  margin-top: 0.5rem;
  padding: 1.25rem;
  overflow-x: auto;
  background: rgba(11, 26, 58, 0.5);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
}

.page-faq .faq-more-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--c-white);
}

.page-faq .faq-code-table {
  width: 100%;
  min-width: 460px;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.page-faq .faq-code-table th,
.page-faq .faq-code-table td {
  padding: 0.8rem 0.9rem;
  border-bottom: 1px solid rgba(229, 233, 240, 0.12);
  text-align: left;
}

.page-faq .faq-code-table thead th {
  border-bottom: 1px solid rgba(229, 233, 240, 0.3);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.page-faq .faq-code-table td:first-child {
  color: var(--c-white);
  font-weight: 700;
}

.page-faq .faq-note {
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--c-slate);
}

.page-faq .faq-note a {
  color: var(--c-info);
  text-underline-offset: 4px;
}

.page-faq .faq-note a:hover {
  color: var(--c-accent);
}

/* 02 按设备/系统筛选 */
.page-faq .faq-filter-section {
  padding: clamp(1.5rem, 5vw, 3rem);
  background: linear-gradient(135deg, #F7F9FC, #E5E9F0);
  border-radius: 24px;
  color: var(--c-ink);
}

.page-faq .faq-filter-section .section-index {
  color: rgba(26, 32, 44, 0.12);
  -webkit-text-stroke: 1px rgba(26, 32, 44, 0.4);
}

.page-faq .faq-filter-section .section-title {
  color: var(--c-ink);
}

.page-faq .faq-filter-section .section-desc {
  color: var(--c-slate);
}

.page-faq .faq-filter-panel {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.page-faq .faq-filter-label {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.page-faq .faq-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-faq .faq-filter-chips .chip {
  padding: 0.4rem 0.9rem;
  background: var(--c-white);
  border: 1px solid #CBD5E0;
  border-radius: 999px;
  font-family: var(--font-head);
  font-size: 0.875rem;
  color: var(--c-ink);
}

.page-faq .faq-filter-chips .chip-accent {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: var(--c-white);
}

.page-faq .faq-filter-results {
  display: grid;
  gap: 0.75rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-filter-results li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  align-items: baseline;
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid #DDE4EC;
  border-radius: 10px;
}

.page-faq .faq-result-code {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--c-accent);
}

.page-faq .faq-result-text {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--c-slate);
}

/* 03 通用登录问题 */
.page-faq .faq-general-list {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.page-faq .faq-general-item {
  padding: 1.25rem;
  background: rgba(22, 51, 122, 0.55);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
}

.page-faq .faq-general-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.25rem 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--c-white);
}

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

.page-faq .faq-general-item summary::after {
  content: "＋";
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--c-accent);
  transition: transform 0.25s var(--ease);
}

.page-faq .faq-general-item[open] summary::after {
  transform: rotate(45deg);
}

.page-faq .faq-general-body {
  padding-top: 0.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--faq-text-muted);
}

.page-faq .faq-general-body ol {
  padding-left: 1.3rem;
}

.page-faq .faq-general-body li {
  margin-bottom: 0.5rem;
}

.page-faq .faq-general-item[open] .faq-general-body {
  animation: faq-rise-10911 0.3s var(--ease) both;
}

/* 04 联系支持 */
.page-faq .faq-support {
  margin-top: clamp(4rem, 10vw, 7.5rem);
}

.page-faq .faq-support-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-faq .faq-support-content .section-head {
  margin-bottom: 1.5rem;
}

.page-faq .faq-contact-list {
  display: grid;
  gap: 0.75rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.page-faq .faq-contact-label {
  display: block;
  margin-bottom: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-slate);
}

.page-faq .faq-contact-list li {
  font-family: var(--font-head);
  font-size: 1rem;
  color: var(--faq-text);
}

.page-faq .faq-support-figure {
  margin: 0;
  overflow: hidden;
  aspect-ratio: 2 / 1;
  background: linear-gradient(135deg, #16337A, #0B1A3A);
  border-radius: 20px;
  box-shadow: 0 22px 55px -30px rgba(0, 0, 0, 0.6);
}

.page-faq .faq-support-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 桌面端增强 */
@media (min-width: 768px) {
  .page-faq .faq-filter-panel {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-support-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }

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

@media (min-width: 1024px) {
  .page-faq .faq-code-layout {
    grid-template-columns: minmax(220px, 0.75fr) minmax(0, 2fr);
    gap: 3rem;
    align-items: start;
  }

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