.page-faq {
  --faq-sidebar-w: 320px;
  --faq-border: rgba(255,255,255,0.08);
  --faq-green-glow: rgba(0,255,170,0.12);
  --faq-caption: 0.875rem;
  --faq-mono: var(--font-data);
  background-color: var(--color-bg);
  color: var(--color-text);
  padding-bottom: var(--space-24);
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: var(--space-8) 0 var(--space-12);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(0,255,170,0.05) 0%, transparent 50%),
    repeating-linear-gradient(90deg, transparent 0, transparent 59px, rgba(255,255,255,0.02) 60px),
    repeating-linear-gradient(0deg, transparent 0, transparent 59px, rgba(255,255,255,0.02) 60px);
}

.page-faq .faq-hero__bg::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 45%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  animation: faq-flow 2.6s ease-in-out infinite;
}

@keyframes faq-flow {
  0% { transform: translateX(-100%); opacity: 0; }
  30% { opacity: 1; }
  100% { transform: translateX(260%); opacity: 0; }
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

.page-faq .faq-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--faq-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.page-faq .faq-hero__eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--color-accent);
}

.page-faq .faq-hero__title {
  position: relative;
  width: fit-content;
  margin: var(--space-4) 0 var(--space-6);
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: var(--h1);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__title::after {
  content: "";
  display: inline-block;
  width: 0.28em;
  height: 0.28em;
  margin-left: 0.14em;
  background: var(--color-accent-alt);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.page-faq .faq-hero__lead {
  max-width: 56ch;
  color: var(--color-text-dim);
  line-height: 1.8;
}

.page-faq .faq-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-12);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--faq-border);
}

.page-faq .faq-hero__stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.page-faq .faq-hero__stat-num {
  font-family: var(--faq-mono);
  font-size: var(--h3);
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
}

.page-faq .faq-hero__stat-label {
  font-size: var(--faq-caption);
  color: var(--color-text-dim);
  letter-spacing: 0.06em;
}

.page-faq .faq-hero__visual {
  position: relative;
  isolation: isolate;
}

.page-faq .faq-hero__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--faq-border);
  border-radius: var(--radius-lg);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-faq .faq-hero__note {
  display: none;
  position: absolute;
  bottom: var(--space-4);
  right: var(--space-6);
  writing-mode: vertical-rl;
  font-family: var(--faq-mono);
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.25);
}

/* ===== 整体栅格 ===== */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-12);
  margin-top: var(--space-12);
  align-items: start;
}

/* ===== 左侧分类目录 ===== */
.page-faq .faq-sidebar {
  display: grid;
  gap: var(--space-6);
}

.page-faq .faq-sidebar__card {
  position: relative;
  overflow: hidden;
  padding: var(--space-6);
  background: var(--color-card);
  border: 1px solid var(--faq-border);
  border-radius: var(--radius-lg);
}

.page-faq .faq-sidebar__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), transparent 75%);
}

.page-faq .faq-sidebar__label {
  margin-bottom: var(--space-4);
  font-family: var(--faq-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

.page-faq .faq-sidebar__nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.page-faq .faq-sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.03);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.3;
  transition: background-color 0.3s var(--ease-out), color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.page-faq .faq-sidebar__link:hover {
  background: var(--faq-green-glow);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.page-faq .faq-sidebar__num {
  flex-shrink: 0;
  font-family: var(--faq-mono);
  font-size: 0.7rem;
  line-height: 1.3;
  padding: 0.15rem 0.3rem;
  border: 1px solid rgba(0,255,170,0.35);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
}

.page-faq .faq-sidebar__name {
  flex: 1;
}

.page-faq .faq-sidebar__arrow {
  display: none;
  color: var(--color-accent);
  font-size: 0.85rem;
  opacity: 0;
  transform: translate(-3px, 3px);
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.page-faq .faq-sidebar__link:hover .faq-sidebar__arrow {
  opacity: 1;
  transform: translate(0, 0);
}

.page-faq .faq-sidebar__imgwrap {
  margin-top: var(--space-6);
  overflow: hidden;
  border-radius: var(--radius-md);
  aspect-ratio: 3 / 4;
}

.page-faq .faq-sidebar__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}

.page-faq .faq-sidebar__imgwrap:hover .faq-sidebar__img {
  transform: scale(1.04);
}

.page-faq .faq-sidebar__helper {
  padding: var(--space-6);
  background: linear-gradient(135deg, rgba(0,255,170,0.1), rgba(255,107,53,0.07) 70%);
  border: 1px solid var(--faq-border);
  border-radius: var(--radius-lg);
}

.page-faq .faq-sidebar__helper-title {
  margin-bottom: var(--space-2);
  font-size: 1.1rem;
  font-weight: 800;
}

.page-faq .faq-sidebar__helper-text {
  margin-bottom: var(--space-4);
  color: var(--color-text-dim);
  font-size: var(--faq-caption);
  line-height: 1.7;
}

/* ===== 右侧问答区 ===== */
.page-faq .faq-content {
  display: grid;
  gap: var(--space-16);
  min-width: 0;
}

.page-faq .faq-section {
  position: relative;
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.page-faq .faq-section__header {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding-right: var(--space-8);
  margin-bottom: var(--space-6);
}

.page-faq .faq-section__count {
  position: absolute;
  top: -18px;
  right: 0;
  z-index: 0;
  font-family: var(--faq-mono);
  font-size: clamp(3rem, 6vw, 4.25rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
  color: rgba(255,255,255,0.05);
  pointer-events: none;
}

.page-faq .faq-section__icon {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--faq-green-glow);
  border: 2px solid var(--color-accent);
  border-radius: 12px;
}

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

.page-faq .faq-section__eyebrow {
  margin-bottom: var(--space-1);
  font-family: var(--faq-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent-alt);
}

.page-faq .faq-section__title {
  font-size: var(--h3);
  font-weight: 900;
  line-height: 1.2;
}

/* 分类 CSS 图标 */
.page-faq .faq-section__icon--schedule::before {
  content: "";
  position: absolute;
  inset: 7px;
  border: 2px solid var(--color-accent);
  border-radius: 6px;
}

.page-faq .faq-section__icon--schedule::after {
  content: "";
  position: absolute;
  top: 7px;
  left: 7px;
  right: 7px;
  height: 10px;
  background: var(--color-accent-alt);
  border-radius: 6px 6px 0 0;
}

.page-faq .faq-section__icon--team::before {
  content: "";
  position: absolute;
  top: 13px;
  left: 10px;
  right: 10px;
  height: 4px;
  border-radius: 2px;
  background: var(--color-accent);
  box-shadow: 0 10px 0 var(--color-accent-alt), 0 20px 0 var(--color-accent);
}

.page-faq .faq-section__icon--save::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 18px;
  height: 24px;
  transform: translate(-50%, -50%);
  background: var(--color-accent);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 72%, 0 100%);
}

.page-faq .faq-section__icon--product::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 18px;
  height: 24px;
  transform: translate(-50%, -50%);
  background: var(--color-accent-alt);
  clip-path: polygon(55% 0, 12% 55%, 42% 55%, 30% 100%, 88% 42%, 55% 42%);
}

/* 手风琴 */
.page-faq .faq-list {
  display: grid;
  gap: var(--space-3);
}

.page-faq .faq-item {
  overflow: hidden;
  background: var(--color-card);
  border: 1px solid var(--faq-border);
  border-left: 3px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  transition: border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), background-color 0.3s var(--ease-out);
}

.page-faq .faq-item[open] {
  border-left-color: var(--color-accent);
  background: linear-gradient(180deg, rgba(0,255,170,0.03), transparent 30%), var(--color-card);
  box-shadow: 0 12px 32px rgba(0,0,0,0.28);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

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

.page-faq .faq-item__q::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--faq-mono);
  font-size: 1.4rem;
  line-height: 1;
  color: var(--color-text-dim);
  transition: color 0.3s var(--ease-out), transform 0.4s var(--ease-out);
}

.page-faq .faq-item[open] .faq-item__q::after {
  color: var(--color-accent);
  transform: rotate(45deg);
}

.page-faq .faq-item__num {
  flex-shrink: 0;
  font-family: var(--faq-mono);
  font-size: 0.7rem;
  line-height: 1.4;
  padding: 0.15rem 0.4rem;
  border: 1px solid rgba(0,255,170,0.35);
  border-radius: var(--radius-sm);
  background: rgba(0,255,170,0.06);
  color: var(--color-accent);
}

.page-faq .faq-item__text {
  flex: 1;
  font-weight: 600;
  line-height: 1.5;
}

.page-faq .faq-item__a {
  padding: 0 var(--space-6) var(--space-6);
}

.page-faq .faq-item__a p {
  margin: 0;
  padding-top: var(--space-4);
  border-top: 1px solid rgba(255,255,255,0.06);
  color: var(--color-text-dim);
  line-height: 1.85;
  font-size: 0.95rem;
}

/* 底部引导 */
.page-faq .faq-footer-note {
  position: relative;
  overflow: hidden;
  margin-top: var(--space-8);
  padding: var(--space-8);
  background: var(--color-card);
  border: 1px solid var(--faq-border);
  border-radius: var(--radius-lg);
}

.page-faq .faq-footer-note::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--color-accent);
}

.page-faq .faq-footer-note__title {
  margin-bottom: var(--space-2);
  font-size: 1.2rem;
  font-weight: 800;
}

.page-faq .faq-footer-note__text {
  margin-bottom: var(--space-6);
  color: var(--color-text-dim);
  line-height: 1.7;
  font-size: var(--faq-caption);
}

.page-faq .faq-footer-note__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ===== 桌面端 ===== */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: var(--space-16) 0 var(--space-24);
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: var(--space-16);
  }

  .page-faq .faq-hero__note {
    display: block;
  }

  .page-faq .faq-hero__visual {
    padding: var(--space-4) var(--space-4) var(--space-4) var(--space-6);
  }

  .page-faq .faq-hero__visual::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: var(--faq-green-glow);
    border-radius: var(--radius-lg);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
  }

  .page-faq .faq-shell {
    grid-template-columns: var(--faq-sidebar-w) minmax(0, 1fr);
    gap: var(--space-16);
  }

  .page-faq .faq-sidebar {
    position: sticky;
    top: calc(var(--header-height) + 24px);
  }

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

  .page-faq .faq-sidebar__link {
    padding: var(--space-3) var(--space-4);
  }

  .page-faq .faq-sidebar__arrow {
    display: inline;
  }

  .page-faq .faq-content {
    gap: var(--space-24);
  }

  .page-faq .faq-section__header {
    margin-bottom: var(--space-8);
  }
}

/* ===== 窄屏精简 ===== */
@media (max-width: 599px) {
  .page-faq .faq-sidebar__imgwrap {
    display: none;
  }

  .page-faq .faq-hero__stats {
    gap: var(--space-4) var(--space-8);
  }
}