.page-faq {
  background: var(--paper);
  color: var(--ink);
}

/* ========== Hero 区 ========== */
.page-faq .faq-hero {
  background: linear-gradient(135deg, var(--dark-green) 0%, var(--green) 100%);
  color: var(--white);
  padding: 40px 0 0;
  overflow: hidden;
  border-bottom: var(--border-thick);
}

.page-faq .faq-hero-inner {
  display: grid;
  gap: 28px;
  align-items: end;
}

.page-faq .faq-hero-kicker {
  font-family: var(--font-number);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  margin: 0 0 8px;
}

.page-faq .faq-hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 9vw, 4.75rem);
  font-weight: 800;
  line-height: 0.95;
  margin: 0 0 14px;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero-desc {
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.85);
  max-width: 560px;
  margin: 0 0 24px;
}

.page-faq .faq-hero-stats {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-faq .faq-hero-stat-num {
  display: block;
  font-family: var(--font-number);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--blue);
  line-height: 1;
}

.page-faq .faq-hero-stat-label {
  display: block;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 4px;
}

.page-faq .faq-hero-figure {
  border: 3px solid var(--white);
  box-shadow: 10px 10px 0px rgba(0, 0, 0, 0.35);
  background: var(--ink);
  overflow: hidden;
}

.page-faq .faq-hero-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.85;
}

/* ========== 两列主布局 ========== */
.page-faq .faq-layout {
  display: grid;
  gap: 36px;
  padding-top: 32px;
  padding-bottom: 48px;
  align-items: start;
}

/* ========== 左列分类导航 ========== */
.page-faq .faq-index {
  align-self: start;
  position: relative;
}

.page-faq .faq-index-title {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 700;
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: var(--border-thick);
}

.page-faq .faq-index-nav {
  display: grid;
  gap: 8px;
  margin-bottom: 24px;
}

.page-faq .faq-topic {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--white);
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0px var(--ink);
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.page-faq .faq-topic:hover {
  background: var(--grass);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px var(--ink);
}

.page-faq .faq-topic:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}

.page-faq .faq-topic-id {
  font-family: var(--font-number);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--gray);
  flex-shrink: 0;
}

.page-faq .faq-topic-name {
  min-width: 0;
}

/* 默认高亮第一个分类 */
.page-faq .faq-topic[href="#faq-update"] {
  background: var(--orange);
  border-left: 6px solid var(--ink);
  box-shadow: 4px 4px 0px var(--ink);
}

.page-faq .faq-topic[href="#faq-update"] .faq-topic-id {
  color: var(--ink);
}

/* 通过 :has + :target 切换当前分类高亮 */
.page-faq .faq-index:has(~ .faq-main #faq-version:target) .faq-topic[href="#faq-update"],
.page-faq .faq-index:has(~ .faq-main #faq-standings:target) .faq-topic[href="#faq-update"],
.page-faq .faq-index:has(~ .faq-main #faq-feedback:target) .faq-topic[href="#faq-update"] {
  background: var(--white);
  border-left: 2px solid var(--ink);
  box-shadow: 3px 3px 0px var(--ink);
}

.page-faq .faq-index:has(~ .faq-main #faq-version:target) .faq-topic[href="#faq-version"],
.page-faq .faq-index:has(~ .faq-main #faq-standings:target) .faq-topic[href="#faq-standings"],
.page-faq .faq-index:has(~ .faq-main #faq-feedback:target) .faq-topic[href="#faq-feedback"] {
  background: var(--orange);
  border-left: 6px solid var(--ink);
  box-shadow: 4px 4px 0px var(--ink);
}

.page-faq .faq-index:has(~ .faq-main #faq-version:target) .faq-topic[href="#faq-version"] .faq-topic-id,
.page-faq .faq-index:has(~ .faq-main #faq-standings:target) .faq-topic[href="#faq-standings"] .faq-topic-id,
.page-faq .faq-index:has(~ .faq-main #faq-feedback:target) .faq-topic[href="#faq-feedback"] .faq-topic-id {
  color: var(--ink);
}

/* 帮助卡片 */
.page-faq .faq-help-card {
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow-hard);
  padding: 16px;
  display: grid;
  gap: 12px;
}

.page-faq .faq-help-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--ink);
}

.page-faq .faq-help-title {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 700;
  margin: 0;
}

.page-faq .faq-help-text {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--gray);
  margin: 0;
}

.page-faq .faq-help-card .btn-primary {
  width: 100%;
  justify-content: center;
}

/* ========== 右列折叠区 ========== */
.page-faq .faq-main {
  display: grid;
  gap: 32px;
  min-width: 0;
}

.page-faq .faq-group {
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow-hard);
  padding: 18px 16px;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--ink);
}

.page-faq .faq-group-num {
  font-family: var(--font-number);
  font-size: 1.75rem;
  line-height: 1;
  font-weight: 700;
  color: var(--orange);
  background: var(--ink);
  padding: 6px 8px;
  flex-shrink: 0;
  display: inline-block;
}

.page-faq .faq-group-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 4px;
}

.page-faq .faq-group-sub {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--gray);
  margin: 0;
}

/* 折叠项 */
.page-faq .faq-item {
  border: 2px solid var(--light-gray);
  background: var(--white);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-item + .faq-item {
  margin-top: 12px;
}

.page-faq .faq-item[open] {
  background: var(--grass);
  border-color: var(--ink);
}

.page-faq .faq-item-summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 14px;
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1.45;
  -webkit-tap-highlight-color: transparent;
}

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

.page-faq .faq-item-summary:hover .faq-q-text {
  color: var(--green);
}

.page-faq .faq-q-num {
  font-family: var(--font-number);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--blue);
  background: var(--ink);
  padding: 3px 6px;
  flex-shrink: 0;
  line-height: 1;
}

.page-faq .faq-q-text {
  flex: 1;
  min-width: 0;
  transition: color 0.2s ease;
}

.page-faq .faq-icon {
  flex-shrink: 0;
  color: var(--ink);
  transition: transform 0.3s ease;
}

.page-faq .faq-item[open] .faq-icon {
  transform: rotate(45deg);
}

.page-faq .faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}

.page-faq .faq-a-inner {
  overflow: hidden;
  min-height: 0;
}

.page-faq .faq-item[open] .faq-a {
  grid-template-rows: 1fr;
}

.page-faq .faq-a-inner p {
  margin: 0;
  padding: 2px 14px 14px;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-faq .faq-tag {
  display: inline-block;
  margin: 0 14px 16px;
  font-family: var(--font-number);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--white);
  background: var(--green);
  text-decoration: none;
  padding: 6px 10px;
  border: 2px solid var(--ink);
  box-shadow: 2px 2px 0px var(--ink);
  transition: background 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-tag:hover {
  background: var(--orange);
  transform: translate(-1px, -1px);
}

/* ========== 底部联系区 ========== */
.page-faq .faq-outro {
  background: var(--dark-green);
  color: var(--white);
  padding: 48px 0 56px;
  position: relative;
  overflow: hidden;
  border-top: var(--border-thick);
}

.page-faq .faq-outro::before {
  content: "";
  position: absolute;
  top: -50px;
  right: 12%;
  width: 110px;
  height: 110px;
  background: var(--green);
  transform: rotate(45deg);
  opacity: 0.45;
}

.page-faq .faq-outro::after {
  content: "";
  position: absolute;
  bottom: -30px;
  left: 8%;
  width: 60px;
  height: 60px;
  border: 4px solid var(--orange);
  transform: rotate(20deg);
  opacity: 0.5;
}

.page-faq .faq-outro-inner {
  display: grid;
  gap: 24px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.page-faq .faq-outro-kicker {
  font-family: var(--font-number);
  font-weight: 700;
  color: var(--orange);
  margin: 0 0 6px;
}

.page-faq .faq-outro-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 800;
  line-height: 1.05;
  margin: 0 0 10px;
}

.page-faq .faq-outro-text {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
}

.page-faq .faq-outro-btn {
  justify-self: start;
  border-color: var(--white);
  color: var(--white);
  background: transparent;
  box-shadow: 6px 6px 0px rgba(0, 0, 0, 0.3);
  transform: rotate(-1deg);
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.page-faq .faq-outro-btn:hover {
  background: var(--orange);
  color: var(--ink);
  border-color: var(--ink);
  transform: rotate(0deg) translateY(-2px);
  box-shadow: 8px 8px 0px rgba(0, 0, 0, 0.3);
}

/* ========== 桌面端适配 ========== */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: 64px;
  }

  .page-faq .faq-hero-inner {
    grid-template-columns: 1fr 1.1fr;
    gap: 48px;
  }

  .page-faq .faq-hero-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 300px 1fr;
    gap: 48px;
    padding-top: 48px;
    padding-bottom: 72px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 48px;
  }

  .page-faq .faq-main {
    gap: 48px;
  }

  .page-faq .faq-group {
    padding: 24px 22px;
  }

  .page-faq .faq-group-head {
    margin-bottom: 22px;
    padding-bottom: 16px;
  }

  .page-faq .faq-group-title {
    font-size: 1.75rem;
  }

  .page-faq .faq-outro {
    padding: 64px 0 72px;
  }

  .page-faq .faq-outro-inner {
    grid-template-columns: 1fr auto;
    gap: 48px;
  }

  .page-faq .faq-outro-btn {
    justify-self: end;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-layout {
    grid-template-columns: 320px 1fr;
    gap: 56px;
  }
}