.page-faq {
  --faq-rail-w: 292px;
  --faq-sticky-top: 96px;
  display: block;
  background: var(--bg);
  color: var(--text);
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 44px;
  background:
    radial-gradient(120% 150% at 6% 0%, rgba(51, 221, 245, 0.15), transparent 58%),
    radial-gradient(95% 130% at 100% 106%, rgba(255, 138, 60, 0.17), transparent 62%),
    linear-gradient(180deg, #0B1512 0%, #0E1B2B 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--lime) 0%, var(--cyan) 42%, rgba(51, 221, 245, 0) 100%);
}

.page-faq .faq-hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-faq .faq-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.24;
  filter: saturate(0.85) contrast(1.08);
}

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

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 24px;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 12px;
}

.page-faq .faq-hero .h1 {
  margin: 0;
  max-width: 17ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(29px, 7.2vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero-lead {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: var(--fs-17);
  line-height: 1.82;
  color: var(--text-soft);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ===== 症状面板 ===== */
.page-faq .faq-console-section {
  padding: 44px 0 10px;
}

.page-faq .faq-console-section .section-head {
  margin-bottom: 26px;
}

.page-faq .faq-console {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-faq .faq-rail {
  display: grid;
  gap: 14px;
  align-content: start;
  min-width: 0;
}

.page-faq .symptom-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-faq .symptom-list .filter-btn {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  margin: 0;
  padding: 13px 14px;
  text-align: left;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.35;
  color: var(--text-soft);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.page-faq .symptom-list .filter-btn:hover {
  border-color: var(--cyan);
  color: var(--text);
  transform: translateX(2px);
}

.page-faq .symptom-list .filter-btn[aria-pressed="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: #08110D;
  font-weight: 700;
}

.page-faq .symptom-index {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.page-faq .symptom-list .filter-btn[aria-pressed="true"] .symptom-index {
  color: #08110D;
  opacity: 0.62;
}

.page-faq .answer-count {
  margin: 0;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-faq .rail-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted);
  padding-left: 10px;
  border-left: 2px solid var(--line);
}

/* ===== 答案卡片 ===== */
.page-faq .faq-answers {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.page-faq [data-filter-item][hidden],
.page-faq [data-filter-item].is-hidden {
  display: none;
}

.page-faq .answer-card {
  position: relative;
  padding: 22px 18px 20px;
  background: linear-gradient(158deg, var(--panel) 0%, rgba(16, 26, 24, 0.82) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  scroll-margin-top: 108px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .answer-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--lime), rgba(200, 255, 77, 0) 72%);
  opacity: 0.6;
}

.page-faq #a-timeout::before {
  background: linear-gradient(180deg, var(--cyan), rgba(51, 221, 245, 0) 72%);
}

.page-faq #a-page::before {
  background: linear-gradient(180deg, var(--orange), rgba(255, 138, 60, 0) 72%);
}

.page-faq #a-line::before {
  background: linear-gradient(180deg, var(--cyan), rgba(51, 221, 245, 0) 72%);
}

.page-faq #a-service::before {
  background: linear-gradient(180deg, var(--orange), rgba(255, 138, 60, 0) 72%);
}

.page-faq .answer-card:hover {
  border-color: rgba(51, 221, 245, 0.45);
}

.page-faq .answer-head {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .answer-head-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.page-faq .answer-code {
  font-family: var(--font-num);
  font-size: 27px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-faq .answer-head .h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 4.6vw, 25px);
  line-height: 1.26;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .answer-kicker {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* 步骤 */
.page-faq .step-list {
  margin-top: 2px;
}

.page-faq .step-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 0;
  border-bottom: 1px dashed rgba(46, 74, 68, 0.75);
}

.page-faq .step-item:last-child {
  border-bottom: none;
  padding-bottom: 4px;
}

.page-faq .step-num {
  flex: 0 0 auto;
  width: 40px;
  font-family: var(--font-num);
  font-size: clamp(24px, 6vw, 31px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

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

.page-faq .step-body h4 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-17);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .step-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-soft);
}

/* 线路列表 */
.page-faq .line-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .line-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px 14px;
  background: rgba(29, 43, 40, 0.55);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-faq .line-code {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  padding: 4px 7px;
  border-radius: 2px;
  color: #08110D;
  background: var(--cyan);
}

.page-faq .line-list li:first-child .line-code {
  background: var(--lime);
}

.page-faq .line-list strong {
  display: block;
  margin-bottom: 3px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .line-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* 判断清单 */
.page-faq .check-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .check-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.76;
  color: var(--text-soft);
}

.page-faq .check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.56em;
  width: 7px;
  height: 7px;
  border-radius: 1px;
  background: var(--orange);
  transform: rotate(45deg);
}

.page-faq .answer-note {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-faq .answer-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(51, 221, 245, 0.45);
}

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

/* 插图 */
.page-faq .answer-figure {
  margin: 18px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel-deep);
  line-height: 0;
}

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

/* 卡片底部 */
.page-faq .answer-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-faq .answer-foot .muted {
  flex: 1 1 180px;
  font-size: 13px;
  line-height: 1.65;
}

/* ===== 快速索引 ===== */
.page-faq .faq-index-section {
  padding: 52px 0 44px;
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(51, 221, 245, 0.08), transparent 60%),
    linear-gradient(180deg, rgba(14, 27, 43, 0) 0%, rgba(14, 27, 43, 0.55) 42%, rgba(14, 27, 43, 0) 100%);
}

.page-faq .faq-index-section .section-head {
  margin-bottom: 22px;
}

.page-faq .index-rows {
  display: grid;
}

.page-faq .index-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 16px;
  align-items: center;
  padding: 16px 6px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  transition: background var(--dur) var(--ease);
}

.page-faq .index-row:first-child {
  border-top: 1px solid var(--line);
}

.page-faq .index-symptom {
  grid-column: 1;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}

.page-faq .index-fix {
  grid-column: 1;
  font-size: 14px;
  line-height: 1.62;
  color: var(--muted);
}

.page-faq .index-go {
  grid-row: 1 / span 2;
  grid-column: 2;
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--muted-2);
  font-variant-numeric: tabular-nums;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .index-row:hover {
  background: rgba(200, 255, 77, 0.05);
}

.page-faq .index-row:hover .index-symptom {
  color: var(--lime);
}

.page-faq .index-row:hover .index-go {
  color: var(--lime);
  transform: translateX(4px);
}

.page-faq .index-note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .index-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(51, 221, 245, 0.4);
}

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

.page-faq .faq-outro {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 30px;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(200, 255, 77, 0.09), rgba(51, 221, 245, 0.06));
}

.page-faq .faq-outro p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-20);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--text);
}

/* ===== 中等屏幕 ===== */
@media (min-width: 640px) {
  .page-faq .faq-hero {
    padding: 34px 0 54px;
  }

  .page-faq .answer-card {
    padding: 26px 24px 24px;
  }

  .page-faq .step-item {
    gap: 18px;
  }

  .page-faq .step-num {
    width: 46px;
  }
}

/* ===== 桌面 ===== */
@media (min-width: 900px) {
  .page-faq .faq-console-section {
    padding-top: 56px;
  }

  .page-faq .faq-console {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 38px;
    align-items: start;
  }

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

  .page-faq .symptom-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-hero .h1 {
    max-width: 20ch;
  }

  .page-faq .answer-card {
    padding: 30px 30px 26px;
  }

  .page-faq .index-row {
    grid-template-columns: minmax(0, 15ch) minmax(0, 1fr) auto;
    gap: 6px 20px;
    padding: 18px 8px;
  }

  .page-faq .index-fix {
    grid-column: 2;
    grid-row: 1;
  }

  .page-faq .index-go {
    grid-column: 3;
    grid-row: 1;
  }

  .page-faq .faq-index-section {
    padding: 64px 0 56px;
  }
}