/* ========== 支持中心 FAQ 页面 ========== */
.page-faq {
  --faq-card-shadow: 8px 8px 0 rgba(10, 30, 60, 0.18);
  --faq-card-shadow-sm: 4px 4px 0 rgba(10, 30, 60, 0.14);
  background: var(--color-light);
  color: var(--color-text);
  overflow-x: clip;
}
.page-faq .container {
  min-width: 0;
}

/* ---- 封面 ---- */
.page-faq .faq-cover {
  position: relative;
  background: linear-gradient(140deg, var(--color-navy) 0%, var(--color-navy-secondary) 58%, var(--color-navy-deep) 100%);
  color: var(--color-white);
  padding: 112px 0 48px;
  overflow: hidden;
}
.page-faq .faq-cover::before {
  content: "";
  position: absolute;
  top: 88px;
  right: -32px;
  width: 180px;
  height: 140px;
  background: repeating-linear-gradient(135deg, rgba(196, 255, 0, 0.14) 0 8px, transparent 8px 22px);
  clip-path: polygon(18% 0, 100% 0, 100% 100%, 0 100%);
}
.page-faq .breadcrumbs {
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}
.page-faq .faq-cover-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
  padding-bottom: 36px;
}
.page-faq .faq-cover-copy {
  min-width: 0;
}
.page-faq .faq-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-lime);
  text-transform: uppercase;
}
.page-faq .faq-eyebrow::before {
  content: "";
  width: 34px;
  height: 12px;
  background: repeating-linear-gradient(90deg, var(--color-lime) 0 4px, transparent 4px 8px);
}
.page-faq .faq-cover h1 {
  margin-bottom: 18px;
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.01em;
  max-width: 900px;
}
.page-faq .faq-cover-lead {
  max-width: 780px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 0;
}
.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  min-width: 0;
}
.page-faq .faq-stat {
  background: var(--color-navy-secondary);
  border: 1px solid rgba(196, 255, 0, 0.22);
  box-shadow: var(--faq-card-shadow-sm);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  transition: transform 0.2s ease;
}
.page-faq .faq-stat:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(196, 255, 0, 0.12);
}
.page-faq .faq-stat .stat-number {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-lime);
}
.page-faq .faq-stat .stat-label {
  font-size: 13px;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.7);
}
.page-faq .faq-cover-media {
  margin: 0;
  border-top: 6px solid var(--color-lime);
  background: var(--color-navy-deep);
}
.page-faq .faq-cover-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.92;
}

/* ---- 通用栏目 kicker ---- */
.page-faq .faq-section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-navy);
}
.page-faq .faq-section-kicker::before {
  content: "";
  width: 20px;
  height: 7px;
  background: var(--color-lime);
  box-shadow: 2px 2px 0 rgba(10, 30, 60, 0.3);
}
.page-faq .section-heading {
  margin-bottom: 28px;
}
.page-faq .section-heading h2,
.page-faq .faq-mobile-copy h2,
.page-faq .faq-feedback-copy h2,
.page-faq .faq-migration-guide h3 {
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.2;
  font-weight: 900;
  color: var(--color-navy);
}
.page-faq .section-intro {
  margin-top: 8px;
  max-width: 780px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-gray);
}

/* ---- 热门问题 ---- */
.page-faq .faq-hot {
  padding: 64px 0;
}
.page-faq .faq-layout {
  display: grid;
  gap: 28px;
  min-width: 0;
}
.page-faq .faq-index {
  min-width: 0;
}
.page-faq .faq-index-card {
  background: var(--color-navy);
  border: 2px solid var(--color-navy-deep);
  box-shadow: 8px 8px 0 rgba(196, 255, 0, 0.22);
  padding: 24px 20px;
}
.page-faq .faq-index-card h3 {
  color: var(--color-lime);
  font-size: 18px;
  font-weight: 900;
  margin-bottom: 16px;
  line-height: 1.3;
}
.page-faq .faq-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.page-faq .faq-index .filter-btn {
  background: var(--color-navy-secondary);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--color-white);
  padding: 9px 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}
.page-faq .faq-index .filter-btn:hover {
  transform: translate(-1px, -1px);
  border-color: var(--color-lime);
}
.page-faq .faq-index .filter-btn[aria-pressed="true"] {
  background: var(--color-lime);
  border-color: var(--color-lime);
  color: var(--color-navy);
}
.page-faq .faq-index-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 16px;
}
.page-faq .faq-index-nav a {
  color: rgba(255, 255, 255, 0.76);
  font-size: 14px;
  text-decoration: none;
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.page-faq .faq-index-nav a:hover {
  color: var(--color-lime);
  border-bottom-color: var(--color-lime);
}

/* ---- FAQ 手风琴 ---- */
.page-faq .faq-content {
  display: grid;
  gap: 14px;
  min-width: 0;
}
.page-faq .faq-item {
  background: var(--color-white);
  border: 2px solid var(--color-line);
  box-shadow: 6px 6px 0 rgba(10, 30, 60, 0.07);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
  min-width: 0;
}
.page-faq .faq-item:hover {
  border-color: var(--color-navy-secondary);
}
.page-faq .faq-item[open] {
  border-color: var(--color-navy);
  box-shadow: 8px 8px 0 rgba(10, 30, 60, 0.16);
}
.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  display: block;
  padding: 18px 54px 18px 56px;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--color-navy);
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 24px;
  width: 24px;
  height: 14px;
  background: repeating-linear-gradient(90deg, var(--color-lime) 0 4px, transparent 4px 8px);
}
.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 17px;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 400;
  line-height: 1;
  color: var(--color-navy);
}
.page-faq .faq-item[open] summary::after {
  content: "–";
}
.page-faq .faq-answer {
  border-top: 1px solid var(--color-line);
  padding: 14px 22px 20px 56px;
}
.page-faq .faq-answer p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text);
  max-width: 72ch;
}
.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}

/* ---- 移动端操作指南 ---- */
.page-faq .faq-mobile {
  background: var(--color-navy);
  color: var(--color-white);
  padding: 64px 0;
  position: relative;
  overflow: hidden;
  border-top: 8px solid var(--color-gold);
}
.page-faq .faq-mobile::before {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -60px;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  background: repeating-linear-gradient(135deg, rgba(196, 255, 0, 0.08) 0 10px, transparent 10px 24px);
}
.page-faq .faq-mobile-grid {
  display: grid;
  gap: 40px;
  min-width: 0;
  align-items: center;
  position: relative;
  z-index: 1;
}
.page-faq .faq-mobile-copy {
  min-width: 0;
}
.page-faq .faq-mobile-copy h2 {
  color: var(--color-white);
}
.page-faq .faq-mobile .faq-section-kicker,
.page-faq .faq-migration .faq-section-kicker {
  color: var(--color-lime);
}
.page-faq .faq-mobile .section-intro,
.page-faq .faq-migration .section-intro {
  color: rgba(255, 255, 255, 0.72);
}
.page-faq .faq-steps {
  list-style: none;
  margin: 28px 0 32px;
  padding: 0;
  display: grid;
  gap: 4px;
}
.page-faq .faq-step {
  display: grid;
  grid-template-columns: 56px 1fr;
  column-gap: 16px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  min-width: 0;
}
.page-faq .faq-step:first-child {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}
.page-faq .faq-step-num {
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-gold);
}
.page-faq .faq-step h3 {
  grid-column: 2;
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.3;
}
.page-faq .faq-step p {
  grid-column: 2;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  max-width: 52ch;
}
.page-faq .faq-mobile-media {
  margin: 0;
  min-width: 0;
}
.page-faq .faq-mobile-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 3px solid var(--color-lime);
  box-shadow: 12px 12px 0 rgba(196, 255, 0, 0.14);
}

/* ---- 数据来源与口径 ---- */
.page-faq .faq-data {
  background: var(--color-light);
  padding: 64px 0;
}
.page-faq .faq-data-grid {
  display: grid;
  gap: 16px;
  min-width: 0;
}
.page-faq .faq-data-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-top: 6px solid var(--color-lime);
  box-shadow: 6px 6px 0 rgba(10, 30, 60, 0.08);
  padding: 24px 20px;
  min-width: 0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.page-faq .faq-data-card:nth-child(even) {
  border-top-color: var(--color-gold);
}
.page-faq .faq-data-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 10px 10px 0 rgba(10, 30, 60, 0.14);
}
.page-faq .faq-data-num {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-navy);
}
.page-faq .faq-data-card h3 {
  margin-bottom: 8px;
  font-size: 18px;
  font-weight: 900;
  color: var(--color-navy);
  line-height: 1.3;
}
.page-faq .faq-data-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray);
}
.page-faq .faq-data-note {
  margin-top: 36px;
  border-left: 6px solid var(--color-gold);
  background: var(--color-navy);
  color: rgba(255, 255, 255, 0.86);
  padding: 20px 22px;
  min-width: 0;
}
.page-faq .faq-data-note p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.8;
}
.page-faq .faq-data-note p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-data-note a {
  color: var(--color-lime);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---- 反馈与回访 ---- */
.page-faq .faq-feedback {
  background: var(--color-lime);
  color: var(--color-navy);
  padding: 72px 0;
  border-bottom: 8px solid var(--color-navy);
}
.page-faq .faq-feedback .faq-section-kicker::before {
  background: var(--color-navy);
  box-shadow: 2px 2px 0 rgba(255, 255, 255, 0.4);
}
.page-faq .faq-feedback-layout {
  display: grid;
  gap: 32px;
  min-width: 0;
}
.page-faq .faq-feedback-copy,
.page-faq .faq-feedback-aside {
  min-width: 0;
}
.page-faq .faq-feedback-copy h2 {
  margin-bottom: 16px;
}
.page-faq .faq-feedback-copy > p {
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  margin: 0 0 24px;
}
.page-faq .faq-contact-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 10px;
  min-width: 0;
}
.page-faq .faq-contact-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--color-navy);
}
.page-faq .faq-contact-list li::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  background: var(--color-navy);
  box-shadow: 3px 3px 0 rgba(255, 255, 255, 0.35);
}
.page-faq .faq-feedback-aside {
  display: grid;
  gap: 16px;
}
.page-faq .faq-feedback-card {
  background: var(--color-navy);
  color: var(--color-white);
  border: 2px solid var(--color-navy);
  box-shadow: 8px 8px 0 rgba(10, 30, 60, 0.25);
  padding: 24px 20px;
}
.page-faq .faq-feedback-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 900;
  color: var(--color-gold);
}
.page-faq .faq-feedback-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.78);
}

/* ---- 版本迁移说明 ---- */
.page-faq .faq-migration {
  background: linear-gradient(150deg, var(--color-navy) 0%, var(--color-navy-secondary) 60%, var(--color-navy-deep) 100%);
  color: var(--color-white);
  padding: 72px 0;
  position: relative;
  overflow: hidden;
}
.page-faq .faq-migration::before {
  content: "";
  position: absolute;
  top: -50px;
  right: -20px;
  width: 220px;
  height: 140px;
  background: repeating-linear-gradient(-115deg, rgba(242, 183, 5, 0.12) 0 8px, transparent 8px 20px);
  transform: rotate(6deg);
}
.page-faq .faq-migration .section-heading h2 {
  color: var(--color-white);
}
.page-faq .faq-migration-layout {
  display: grid;
  gap: 40px;
  min-width: 0;
  align-items: start;
  position: relative;
  z-index: 1;
}
.page-faq .faq-timeline {
  margin: 0;
  padding: 0 0 0 24px;
  list-style: none;
  border-left: 2px solid var(--color-gold);
  min-width: 0;
}
.page-faq .timeline-item {
  position: relative;
  padding: 0 0 32px 24px;
  min-width: 0;
}
.page-faq .timeline-item:last-child {
  padding-bottom: 0;
}
.page-faq .timeline-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 4px;
  width: 12px;
  height: 12px;
  background: var(--color-gold);
  border: 2px solid var(--color-navy-deep);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.25);
}
.page-faq .timeline-year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-lime);
}
.page-faq .timeline-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.8);
  max-width: 46ch;
}
.page-faq .faq-migration-guide {
  background: var(--color-navy-secondary);
  border: 2px solid rgba(196, 255, 0, 0.3);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.2);
  padding: 28px 24px;
  min-width: 0;
}
.page-faq .faq-migration-guide h3 {
  margin-bottom: 18px;
  color: var(--color-lime);
}
.page-faq .faq-migration-guide ol {
  margin: 0 0 24px;
  padding-left: 20px;
  display: grid;
  gap: 12px;
  color: rgba(255, 255, 255, 0.82);
}
.page-faq .faq-migration-guide li {
  font-size: 15px;
  line-height: 1.7;
}

/* ---- 响应式 ---- */
@media (min-width: 640px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
@media (min-width: 768px) {
  .page-faq .faq-data-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 992px) {
  .page-faq .faq-cover {
    padding-top: 128px;
  }
  .page-faq .faq-cover-grid {
    grid-template-columns: 1.25fr 0.75fr;
    align-items: end;
    gap: 48px;
    padding-bottom: 48px;
  }
  .page-faq .faq-layout {
    grid-template-columns: 300px 1fr;
    gap: 40px;
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }
  .page-faq .faq-mobile-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
  }
  .page-faq .faq-feedback-layout {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
  }
  .page-faq .faq-migration-layout {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }
}
@media (min-width: 1200px) {
  .page-faq .faq-data-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}