/* ===== 帮助中心 FAQ 页面专属样式 ===== */
.page-faq {
  background: var(--warm-paper);
  color: var(--ink);
}

/* ---- 首屏标题区 ---- */
.page-faq .faq-hero {
  position: relative;
  background: var(--space-blue);
  color: var(--warm-paper);
  padding: 2rem 0 3.4rem;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 2.2rem), 0 100%);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(245, 240, 230, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 240, 230, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: -24%;
  width: 58%;
  height: 130%;
  background: linear-gradient(115deg, rgba(255, 107, 53, 0.28), rgba(255, 215, 0, 0.1) 48%, transparent 70%);
  transform: rotate(12deg);
  pointer-events: none;
}
.page-faq .breadcrumb {
  margin-bottom: 2rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: rgba(245, 240, 230, 0.72);
  position: relative;
  z-index: 1;
}
.page-faq .breadcrumb a {
  color: var(--golden);
  text-decoration: none;
}
.page-faq .breadcrumb-sep {
  margin: 0 0.5rem;
}
.page-faq .faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2rem;
  align-items: end;
}
.page-faq .faq-hero-inner {
  position: relative;
}
.page-faq .faq-hero-kicker {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.25rem 0.6rem;
  border-left: 3px solid var(--vivid-orange);
  background: rgba(255, 107, 53, 0.12);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--golden);
  text-transform: uppercase;
}
.page-faq .faq-hero h1 {
  margin: 0 0 1.2rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.06;
  color: var(--warm-paper);
}
.page-faq .faq-hero-lead {
  margin: 0 0 1.4rem;
  max-width: 680px;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(245, 240, 230, 0.84);
}
.page-faq .faq-hero-meta {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.8rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(245, 240, 230, 0.18);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--golden);
}
.page-faq .faq-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}
.page-faq .faq-hero-stat {
  background: rgba(5, 10, 26, 0.4);
  border: 1px solid rgba(245, 240, 230, 0.14);
  padding: 0.95rem 0.9rem;
  min-height: 4.4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 0.55rem), calc(100% - 0.55rem) 100%, 0 100%);
}
.page-faq .faq-hero-stat-value {
  font-family: var(--font-display);
  font-size: 1.35rem;
  line-height: 1.2;
  color: var(--golden);
}
.page-faq .faq-hero-stat-label {
  font-size: 0.78rem;
  line-height: 1.4;
  color: rgba(245, 240, 230, 0.78);
}

/* ---- 快速答疑主区 ---- */
.page-faq .faq-main {
  padding: 3.4rem 0 4.2rem;
}
.page-faq .faq-layout {
  display: grid;
  gap: 2.2rem;
}
.page-faq .faq-index {
  position: relative;
  padding: 1.4rem 1.3rem;
  background: var(--mist);
  border-left: 4px solid var(--vivid-orange);
}
.page-faq .faq-index-title {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.7rem;
  line-height: 1.15;
  color: var(--space-blue);
}
.page-faq .faq-index-desc {
  margin: 0 0 1.6rem;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--ink);
  opacity: 0.7;
}
.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .faq-index-list li + li {
  margin-top: 0.6rem;
}
.page-faq .faq-index-list a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 0.85rem;
  background: var(--warm-paper);
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--space-blue);
  text-decoration: none;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  background: var(--space-blue);
  color: var(--warm-paper);
  transform: translateX(4px);
}
.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--vivid-orange);
}
.page-faq .faq-index-arrow {
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--vivid-orange);
}
.page-faq .faq-index-list a:hover .faq-index-num,
.page-faq .faq-index-list a:hover .faq-index-arrow,
.page-faq .faq-index-list a:focus-visible .faq-index-num,
.page-faq .faq-index-list a:focus-visible .faq-index-arrow {
  color: var(--golden);
}
.page-faq .faq-index-note {
  margin-top: 1.5rem;
  padding: 1.2rem 1.1rem;
  background: var(--space-blue);
  color: var(--warm-paper);
  position: relative;
  overflow: hidden;
}
.page-faq .faq-index-note::before {
  content: "";
  position: absolute;
  right: -1.2rem;
  top: -1.2rem;
  width: 3.6rem;
  height: 3.6rem;
  background: rgba(255, 107, 53, 0.45);
  transform: rotate(45deg);
}
.page-faq .faq-index-note-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--vivid-orange);
}
.page-faq .faq-index-note-value {
  margin: 0.45rem 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  line-height: 1.3;
  color: var(--golden);
}
.page-faq .faq-index-note-sub {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.65;
  color: rgba(245, 240, 230, 0.82);
}

/* ---- 折叠问答 ---- */
.page-faq .faq-accordion {
  display: grid;
  gap: 2.1rem;
  min-width: 0;
}
.page-faq .faq-group-heading {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 1rem;
  padding-bottom: 0.55rem;
  border-bottom: 2px solid var(--space-blue);
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--space-blue);
}
.page-faq .faq-group-num {
  padding: 0.15rem 0.35rem;
  background: rgba(255, 107, 53, 0.14);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--vivid-orange);
}
.page-faq .faq-card {
  margin-bottom: 0.75rem;
  background: var(--warm-paper);
  border: 1px solid var(--mist);
  border-left: 3px solid var(--vivid-orange);
  box-shadow: var(--shadow-soft);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-faq .faq-card[open] {
  border-left-color: var(--space-blue);
  box-shadow: var(--shadow-deep);
}
.page-faq .faq-card summary {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.95rem 1rem;
  list-style: none;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease);
}
.page-faq .faq-card summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-card summary::marker {
  content: none;
}
.page-faq .faq-card summary:hover {
  background: var(--mist);
}
.page-faq .faq-card[open] summary {
  background: var(--mist);
}
.page-faq .faq-q-mark {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  background: var(--space-blue);
  color: var(--golden);
  font-family: var(--font-display);
  font-size: 1rem;
}
.page-faq .faq-q-title {
  flex: 1;
  min-width: 0;
  font-weight: 700;
  font-size: 0.97rem;
  line-height: 1.5;
  color: var(--ink);
}
.page-faq .faq-icon {
  position: relative;
  flex: none;
  width: 1.5rem;
  height: 1.5rem;
  border: 1px solid var(--vivid-orange);
  border-radius: 2px;
}
.page-faq .faq-icon::before,
.page-faq .faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.75rem;
  height: 2px;
  background: var(--vivid-orange);
  transform: translate(-50%, -50%);
}
.page-faq .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}
.page-faq .faq-card[open] .faq-icon {
  background: var(--vivid-orange);
}
.page-faq .faq-card[open] .faq-icon::after {
  display: none;
}
.page-faq .faq-answer {
  padding: 0.6rem 1.15rem 1.2rem;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--ink);
}
.page-faq .faq-answer p {
  margin: 0.6rem 0 0;
}

/* ---- 安装指引区 ---- */
.page-faq .section-label {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--vivid-orange);
}
.page-faq .install-guide {
  position: relative;
  padding: 3.8rem 0 4.4rem;
  background: var(--deep-ink);
  color: var(--warm-paper);
  overflow: hidden;
}
.page-faq .install-guide::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--vivid-orange), var(--golden) 55%, var(--vivid-orange));
}
.page-faq .install-guide::after {
  content: "";
  position: absolute;
  left: -8%;
  bottom: -22%;
  width: 44%;
  height: 70%;
  background: rgba(255, 107, 53, 0.08);
  transform: rotate(-10deg);
}
.page-faq .install-guide .container {
  position: relative;
  z-index: 1;
}
.page-faq .install-guide h2,
.page-faq .export-guide h2 {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  line-height: 1.1;
}
.page-faq .install-guide h2 {
  color: var(--warm-paper);
}
.page-faq .install-guide .section-lead {
  margin: 0;
  max-width: 720px;
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(245, 240, 230, 0.76);
}
.page-faq .install-grid {
  display: grid;
  gap: 2.2rem;
  margin-top: 2.2rem;
}
.page-faq .install-steps ol {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  counter-reset: faq-step;
}
.page-faq .install-steps li {
  position: relative;
  counter-increment: faq-step;
  min-height: 3.4rem;
  margin-bottom: 0.7rem;
  padding: 0.75rem 1rem 0.75rem 3.1rem;
  background: rgba(245, 240, 230, 0.05);
  border-left: 2px solid rgba(245, 240, 230, 0.25);
  font-size: 0.96rem;
  line-height: 1.6;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-faq .install-steps li:hover {
  background: rgba(255, 107, 53, 0.12);
  border-left-color: var(--vivid-orange);
}
.page-faq .install-steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0.85rem;
  top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--golden);
}
.page-faq .install-steps li strong {
  color: var(--golden);
  font-weight: 700;
}
.page-faq .install-tip {
  margin: 1.5rem 0 0;
  padding: 1rem 1.1rem;
  background: rgba(255, 215, 0, 0.08);
  border-left: 3px solid var(--golden);
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(245, 240, 230, 0.88);
}
.page-faq .install-tip strong {
  color: var(--golden);
}
.page-faq .install-more {
  margin: 1rem 0 0;
  font-size: 0.9rem;
}
.page-faq .install-more a,
.page-faq .support-more a {
  color: var(--golden);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .install-figure {
  margin: 0;
}
.page-faq .install-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(245, 240, 230, 0.14);
  clip-path: polygon(0 0, calc(100% - 1.6rem) 0, 100% 1.6rem, 100% 100%, 0 100%);
}
.page-faq .install-figure figcaption,
.page-faq .export-figure figcaption {
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--vivid-orange);
}
.page-faq .install-figure figcaption::before,
.page-faq .export-figure figcaption::before {
  content: "// ";
}

/* ---- 数据导出说明区 ---- */
.page-faq .export-guide {
  position: relative;
  padding: 4rem 0 4.6rem;
  background: var(--warm-paper);
  color: var(--ink);
}
.page-faq .export-guide::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 5px;
  background: linear-gradient(270deg, var(--vivid-orange), transparent);
}
.page-faq .export-guide h2 {
  color: var(--space-blue);
}
.page-faq .export-guide .section-lead {
  margin: 0;
  max-width: 720px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
  opacity: 0.78;
}
.page-faq .export-grid {
  display: grid;
  gap: 2.4rem;
  margin-top: 2.4rem;
}
.page-faq .export-figure {
  margin: 0;
}
.page-faq .export-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--mist);
  box-shadow: var(--shadow-deep);
  clip-path: polygon(1.6rem 0, 100% 0, 100% calc(100% - 1.6rem), calc(100% - 1.6rem) 100%, 0 100%, 0 1.6rem);
}
.page-faq .export-steps h3 {
  margin: 0 0 1.2rem;
  padding-left: 0.8rem;
  border-left: 4px solid var(--golden);
  font-size: 1.15rem;
  line-height: 1.4;
  color: var(--space-blue);
}
.page-faq .export-timeline {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0.2rem 0 0 1.4rem;
  position: relative;
}
.page-faq .export-timeline::before {
  content: "";
  position: absolute;
  left: 0.4rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: repeating-linear-gradient(to bottom, var(--mist) 0, var(--mist) 6px, transparent 6px, transparent 12px);
}
.page-faq .export-timeline li {
  position: relative;
  padding: 0 0 1.15rem 1.4rem;
  font-size: 0.96rem;
  line-height: 1.7;
}
.page-faq .export-timeline li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.32rem;
  width: 0.7rem;
  height: 0.7rem;
  background: var(--vivid-orange);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.16);
}
.page-faq .export-note {
  margin: 0;
  padding: 1rem 1.1rem;
  background: var(--mist);
  border-left: 4px solid var(--vivid-orange);
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--ink);
}

/* ---- 联系支持区 ---- */
.page-faq .support-cta {
  position: relative;
  padding: 3.2rem 0 3.8rem;
  background: var(--vivid-orange);
  color: var(--deep-ink);
  overflow: hidden;
}
.page-faq .support-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(5, 10, 26, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(5, 10, 26, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}
.page-faq .support-cta::after {
  content: "";
  position: absolute;
  right: -6%;
  top: -30%;
  width: 36%;
  height: 120%;
  background: rgba(255, 215, 0, 0.35);
  transform: rotate(18deg);
}
.page-faq .support-cta .container {
  position: relative;
  z-index: 1;
}
.page-faq .support-cta h2 {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 2.8rem);
  color: var(--deep-ink);
}
.page-faq .support-cta p {
  margin: 0;
  max-width: 640px;
  font-size: 1rem;
  line-height: 1.8;
  font-weight: 500;
}
.page-faq .support-cta .support-mail {
  display: inline-block;
  margin: 1.2rem 0 1.5rem;
  padding: 0.7rem 1rem;
  background: var(--golden);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--deep-ink);
  box-shadow: 4px 4px 0 rgba(5, 10, 26, 0.22);
}
.page-faq .support-cta .btn {
  display: inline-block;
  margin-top: 0.35rem;
  padding: 0.9rem 1.5rem;
  background: var(--deep-ink);
  color: var(--warm-paper);
  text-decoration: none;
  font-weight: 700;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 0.6rem), calc(100% - 0.6rem) 100%, 0 100%);
  transition: transform var(--dur) var(--ease), filter var(--dur) var(--ease);
}
.page-faq .support-cta .btn:hover,
.page-faq .support-cta .btn:focus-visible {
  transform: translateY(-2px);
  filter: brightness(1.15);
}
.page-faq .support-more {
  margin-top: 1rem;
}
.page-faq .support-more a {
  color: var(--deep-ink);
  font-weight: 700;
}

/* ---- 响应式布局 ---- */
@media (min-width: 900px) {
  .page-faq .install-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 3rem;
  }
  .page-faq .export-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 3.2rem;
  }
}
@media (min-width: 960px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 3rem;
  }
  .page-faq .faq-layout {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 2.6rem;
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 1.6rem;
  }
}