/* ==================================================
   FAQ 支持中心 — 页面专属样式
   作用域：.page-faq
   ================================================== */
.page-faq {
  background: var(--bg);
  color: var(--ink);
}

.page-faq .faq-hero,
.page-faq .faq-hot,
.page-faq .faq-categories,
.page-faq .faq-contact {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 3rem);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .625rem;
  margin-bottom: 2rem;
  font: 500 .8125rem/1.4 var(--font-body);
  color: var(--text-muted);
  position: relative;
  z-index: 1;
}
.page-faq .faq-breadcrumb a {
  color: var(--moss);
  text-decoration: none;
}
.page-faq .faq-breadcrumb a:hover {
  text-decoration: underline;
}
.page-faq .faq-breadcrumb [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- Hero 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}
.page-faq .faq-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .12;
  pointer-events: none;
  z-index: 0;
}
.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
}
.page-faq .faq-hero-grid {
  display: grid;
  gap: 2rem;
}
.page-faq .faq-hero-copy {
  max-width: 720px;
}
.page-faq .faq-title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--bg-deep);
  margin: .75rem 0 1.25rem;
  text-wrap: balance;
}
.page-faq .faq-lede {
  font: 400 clamp(1rem, 1.6vw, 1.125rem)/1.7 var(--font-body);
  color: var(--ink);
  max-width: 42em;
  margin-bottom: 1.75rem;
}
.page-faq .faq-hero-deco {
  display: none;
  width: 200px;
  height: 200px;
  object-fit: cover;
  border: 1px solid var(--line);
  box-shadow: 8px 8px 0 rgba(45, 62, 80, .12);
}

/* ---------- 主题标签 ---------- */
.page-faq .faq-topic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .625rem;
}
.page-faq .faq-topic-tags .tag {
  border-radius: 999px;
  text-decoration: none;
  font: 600 .8125rem/1.2 var(--font-body);
  padding: .5rem .95rem;
  border: 1px solid var(--line);
  background: var(--tag);
  color: var(--ink);
  transition: color .2s, background .2s, border-color .2s;
}
.page-faq .faq-topic-tags .tag:hover,
.page-faq .faq-topic-tags .tag:focus-visible {
  border-color: var(--bg-deep);
  background: var(--bg-deep);
  color: var(--white);
}
.page-faq .faq-topic-tags .tag-login {
  border-left: 3px solid var(--moss);
}
.page-faq .faq-topic-tags .tag-download {
  border-left: 3px solid var(--clay);
}
.page-faq .faq-topic-tags .tag-data {
  border-left: 3px solid var(--bg-deep);
}
.page-faq .faq-topic-tags .tag-version {
  border-left: 3px solid var(--alert);
}

/* ---------- 版块头部 ---------- */
.page-faq .faq-section-head {
  display: grid;
  gap: .5rem;
  margin-bottom: 2rem;
}
.page-faq .faq-section-head h2 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.75rem, 3.6vw, 2.5rem);
  letter-spacing: -.02em;
  color: var(--bg-deep);
  margin: 0;
}
.page-faq .faq-section-head p {
  font: 400 .9375rem/1.6 var(--font-body);
  color: var(--text-muted);
  max-width: 42em;
}

/* ---------- 热门问题 ---------- */
.page-faq .faq-hot {
  padding-top: clamp(2rem, 5vw, 4rem);
  padding-bottom: clamp(2rem, 5vw, 4rem);
}
.page-faq .faq-hot-grid {
  display: grid;
  gap: 1.25rem;
}
.page-faq .faq-hot-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 1.75rem 1.5rem 1.5rem 1.75rem;
  transition: transform .18s ease, box-shadow .18s ease;
}
.page-faq .faq-hot-card:hover,
.page-faq .faq-hot-card:focus-within {
  transform: translateY(-4px) rotate(0deg);
  box-shadow: var(--shadow-card);
}
.page-faq .faq-hot-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--moss), var(--volt));
}
.page-faq .faq-hot-card a {
  color: var(--clay);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-faq .faq-hot-card a:hover {
  border-bottom-color: var(--clay);
}
.page-faq .faq-hot-num {
  display: inline-block;
  font-family: var(--font-data);
  font-weight: 600;
  font-size: .8125rem;
  letter-spacing: .06em;
  color: var(--moss);
  background: var(--tag);
  padding: .25rem .5rem;
  margin-bottom: .875rem;
}
.page-faq .faq-hot-card h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--bg-deep);
  margin: 0 0 .625rem;
  letter-spacing: -.01em;
}
.page-faq .faq-hot-card p {
  font: 400 .875rem/1.6 var(--font-body);
  color: var(--ink);
  margin: 0;
}

/* ---------- 分类折叠面板 ---------- */
.page-faq .faq-categories {
  padding-top: clamp(1rem, 3vw, 2.5rem);
  padding-bottom: clamp(3rem, 7vw, 6rem);
  border-top: 1px solid var(--line);
}
.page-faq .faq-groups {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}
.page-faq .faq-group {
  --group-accent: var(--moss);
  scroll-margin-top: 5rem;
}
.page-faq .faq-group[data-group="download"] {
  --group-accent: var(--clay);
}
.page-faq .faq-group[data-group="data"] {
  --group-accent: var(--bg-deep);
}
.page-faq .faq-group[data-group="version"] {
  --group-accent: var(--alert);
}
.page-faq .faq-group-title {
  display: flex;
  align-items: center;
  gap: .75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -.02em;
  color: var(--bg-deep);
  margin: 0 0 1rem;
  padding-bottom: .75rem;
  border-bottom: 3px solid var(--group-accent);
}
.page-faq .faq-group-idx {
  font-family: var(--font-data);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--group-accent);
  border: 1px solid var(--line);
  background: var(--white);
  padding: .25rem .5rem;
}
.page-faq .faq-fold {
  border: 1px solid var(--line);
  border-left: 3px solid var(--group-accent);
  background: var(--bg);
  margin-bottom: .875rem;
  transition: background .2s ease, box-shadow .2s ease;
}
.page-faq .faq-fold[open] {
  background: var(--white);
  box-shadow: var(--shadow-card);
}
.page-faq .faq-fold-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.35;
  color: var(--ink);
  list-style: none;
  user-select: none;
}
.page-faq .faq-fold-summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-fold-summary:hover,
.page-faq .faq-fold-summary:focus-visible {
  color: var(--group-accent);
}
.page-faq .faq-fold-marker {
  flex: 0 0 26px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-family: var(--font-data);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1;
  border: 1px solid currentColor;
  color: var(--group-accent);
  background: transparent;
  transition: transform .3s ease, background .3s ease, color .3s ease;
}
.page-faq .faq-fold[open] .faq-fold-marker {
  background: var(--group-accent);
  color: var(--white);
  transform: rotate(45deg);
}
.page-faq .faq-fold-body {
  padding: .25rem 1.25rem 1.25rem 1.5rem;
  border-top: 1px dashed var(--line);
}
.page-faq .faq-fold-body p {
  margin: 1rem 0 0;
  font: 400 .9rem/1.7 var(--font-body);
  color: var(--ink);
}
.page-faq .faq-fold-body a {
  color: var(--clay);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color .2s;
}
.page-faq .faq-fold-body a:hover {
  border-bottom-color: var(--clay);
}
.page-faq .faq-key {
  font-weight: 700;
  background: linear-gradient(transparent 60%, rgba(198, 255, 0, .6) 0);
  padding: 0 .2em;
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-contact {
  padding-top: 0;
  padding-bottom: clamp(3rem, 6vw, 5rem);
}
.page-faq .faq-contact-card {
  position: relative;
  background: var(--bg-deep);
  color: var(--white);
  padding: 2.5rem clamp(1.5rem, 4vw, 3rem);
  display: grid;
  gap: 2rem;
  overflow: hidden;
}
.page-faq .faq-contact-card::before {
  content: "";
  position: absolute;
  right: -50px;
  top: -50px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(198, 255, 0, .18) 0%, transparent 70%);
  pointer-events: none;
}
.page-faq .faq-contact-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--volt) 0 60%, transparent 60% 100%);
}
.page-faq .faq-contact-copy {
  position: relative;
  z-index: 1;
}
.page-faq .faq-contact-heading {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  letter-spacing: -.02em;
  color: var(--white);
  margin: 0 0 .75rem;
}
.page-faq .faq-contact-intro {
  font: 400 .9375rem/1.65 var(--font-body);
  color: rgba(255, 255, 255, .82);
  margin: 0 0 1.5rem;
  max-width: 38em;
}
.page-faq .faq-contact-rows {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.page-faq .faq-contact-row {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: .75rem;
  align-items: baseline;
  padding-bottom: .875rem;
  border-bottom: 1px solid rgba(255, 255, 255, .14);
}
.page-faq .faq-contact-label {
  font-family: var(--font-data);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--volt);
}
.page-faq .faq-contact-row a {
  color: var(--white);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, .35);
  text-underline-offset: 4px;
}
.page-faq .faq-contact-row a:hover {
  color: var(--volt);
  text-decoration-color: var(--volt);
}
.page-faq .faq-contact-row > span:last-child {
  color: rgba(255, 255, 255, .85);
  font-size: .9rem;
  line-height: 1.5;
}
.page-faq .faq-contact-note {
  font: 400 .8125rem/1.6 var(--font-body);
  color: rgba(255, 255, 255, .68);
  margin: 0;
  max-width: 42em;
}
.page-faq .faq-contact-note a {
  color: var(--volt);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-contact-action {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
}
.page-faq .faq-contact-action .btn {
  white-space: nowrap;
}

/* ---------- 桌面端布局与栅格 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hot-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-faq .faq-hot-card:nth-child(even) {
    transform: rotate(.3deg);
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero {
    padding-top: clamp(3rem, 7vw, 5.5rem);
  }
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
  .page-faq .faq-hero-deco {
    display: block;
  }
  .page-faq .faq-contact-card {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 3rem;
  }
  .page-faq .faq-contact-action {
    align-items: center;
    justify-content: flex-end;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2.5rem 2rem;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-hot-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-faq .faq-hot-card:nth-child(2),
  .page-faq .faq-hot-card:nth-child(5) {
    transform: rotate(.35deg);
  }
}

/* ---------- 减弱动态：尊重用户偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hot-card,
  .page-faq .faq-fold,
  .page-faq .faq-fold-marker {
    transition: none !important;
    transform: none !important;
  }
}