/* ===== 页面作用域：.page-faq ===== */
.page-faq {
  --faq-muted: #5A6472;
  --faq-line: #E4E7EC;
  --faq-paper: #F4F5F7;
  --faq-ink: #10141A;
  background: var(--navy);
  overflow-x: hidden;
}

.page-faq [id^="faq-"] {
  scroll-margin-top: 120px;
}

/* ===== Hero ===== */
.page-faq .faq-hero {
  position: relative;
  padding: 2.25rem 0 3.25rem;
  background: linear-gradient(175deg, var(--navy) 0%, #102A54 100%);
  color: var(--white);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 14px;
  background: linear-gradient(105deg, var(--brand) 0 55%, rgba(228, 0, 43, 0.2) 55%, transparent 78%);
  z-index: 1;
}

.page-faq .faq-hero_inner {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  position: relative;
  z-index: 2;
}

.page-faq .faq-hero_text {
  max-width: 640px;
}

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  color: var(--silver);
}

.page-faq .breadcrumb a {
  color: var(--white);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus {
  color: var(--brand);
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--silver);
}

.page-faq .faq-hero_kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--neon);
  margin-bottom: 1.1rem;
}

.page-faq .faq-hero_kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.18);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.12;
  margin: 0 0 1.5rem;
  font-size: clamp(2.2rem, 5vw, 3.9rem);
  color: var(--white);
}

.page-faq .faq-hero h1 span {
  display: block;
  font-size: 0.52em;
  color: var(--silver);
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.25;
}

.page-faq .faq-hero_desc {
  color: var(--silver);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0 0 1.75rem;
  max-width: 560px;
}

/* 搜索框（装饰性检索） */
.page-faq .faq-search {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  background: var(--white);
  border-radius: 999px;
  padding: 0.65rem 1.1rem;
  max-width: 480px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.28);
}

.page-faq .faq-search svg {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  stroke: var(--faq-muted);
}

.page-faq .faq-search input {
  flex: 1 1 auto;
  min-width: 0;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--faq-ink);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.page-faq .faq-search input::placeholder {
  color: #98A1AD;
}

/* Hero 图片 */
.page-faq .faq-hero_media {
  position: relative;
  max-width: 600px;
}

.page-faq .faq-hero_mediaFrame {
  border-radius: 14px;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.4);
  background: var(--marine);
  aspect-ratio: 2 / 1;
}

.page-faq .faq-hero_mediaFrame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-hero_redBar {
  position: absolute;
  right: -10px;
  bottom: -16px;
  width: 76px;
  height: 30px;
  background: var(--brand);
  clip-path: polygon(8% 0, 100% 0, 92% 100%, 0% 100%);
  opacity: 0.92;
}

/* ===== 信任条 ===== */
.page-faq .faq-trust-strip {
  background: var(--black);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.85rem 0;
}

.page-faq .faq-trust-strip_inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.page-faq .faq-trust-strip .trust-strip_text {
  color: var(--silver);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
}

/* ===== 手册主体 ===== */
.page-faq .faq-manual {
  background:
    radial-gradient(circle at 8% 14%, rgba(228, 0, 43, 0.16), transparent 32%),
    var(--navy);
  padding: 3.5rem 0 4.5rem;
}

.page-faq .faq-manual_layout {
  background: var(--white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 28px 68px rgba(0, 0, 0, 0.36);
}

/* ===== 左侧目录 ===== */
.page-faq .faq-toc {
  background: var(--navy);
  color: var(--white);
  padding: 1.75rem 1.25rem;
}

.page-faq .faq-toc_title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--white);
  margin: 0 0 0.25rem;
}

.page-faq .faq-toc_desc {
  font-size: 0.8rem;
  color: var(--silver);
  margin: 0 0 1.5rem;
}

.page-faq .faq-toc_nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-faq .faq-toc_group {
  margin-bottom: 1.1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  min-width: 0;
}

.page-faq .faq-toc_groupTitle {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
}

.page-faq .faq-toc_groupTitle a {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--white);
  text-decoration: none;
  padding: 0.25rem 0;
}

.page-faq .faq-toc_groupNum {
  font-family: var(--font-mono);
  color: var(--brand);
  font-size: 0.8rem;
  line-height: 1;
}

.page-faq .faq-toc_groupName {
  color: var(--white);
  font-size: 0.95rem;
}

.page-faq .faq-toc_list {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
}

.page-faq .faq-toc_list li {
  margin-bottom: 0.1rem;
}

.page-faq .faq-toc_link {
  display: block;
  padding: 0.35rem 0.5rem;
  color: var(--silver);
  text-decoration: none;
  font-size: 0.875rem;
  border-left: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, padding-left 0.2s ease;
}

.page-faq .faq-toc_link:hover,
.page-faq .faq-toc_link:focus {
  color: var(--white);
  border-left-color: var(--brand);
  background: rgba(255, 255, 255, 0.06);
  padding-left: 0.7rem;
}

.page-faq .faq-toc_contact {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.page-faq .faq-toc_contact .btn-outline {
  border-color: rgba(192, 192, 192, 0.7);
  color: var(--silver);
}

.page-faq .faq-toc_contact .btn-outline:hover,
.page-faq .faq-toc_contact .btn-outline:focus {
  border-color: var(--brand);
  color: var(--white);
}

/* ===== 右侧答案区 ===== */
.page-faq .faq-answer {
  background: var(--white);
  padding: 2rem 1.25rem;
}

.page-faq .faq-section {
  margin-bottom: 2.75rem;
  scroll-margin-top: 110px;
}

.page-faq .faq-section:last-child {
  margin-bottom: 0;
}

.page-faq .faq-section_header {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  border-bottom: 2px solid var(--faq-ink);
  padding-bottom: 0.7rem;
  margin-bottom: 0.35rem;
}

.page-faq .faq-section_num {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--brand);
  line-height: 1;
}

.page-faq .faq-section_title {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--faq-ink);
  margin: 0;
}

.page-faq .faq-section_lead {
  color: var(--faq-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0.9rem 0 1.4rem;
}

/* ===== 折叠面板 ===== */
.page-faq .faq-collapse {
  background: var(--white);
  border: 1px solid var(--faq-line);
  border-radius: 12px;
  margin-bottom: 0.85rem;
  overflow: hidden;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.page-faq .faq-collapse:hover {
  border-color: rgba(228, 0, 43, 0.45);
}

.page-faq .faq-collapse[open] {
  border-color: rgba(228, 0, 43, 0.35);
  box-shadow: 0 10px 28px rgba(11, 29, 58, 0.08);
}

.page-faq .faq-collapse_summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.95rem 1rem;
  cursor: pointer;
  user-select: none;
}

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

.page-faq .faq-collapse_num {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--silver);
  width: 2.1rem;
  text-align: center;
  flex: 0 0 auto;
  transition: color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-collapse_summary:hover .faq-collapse_num,
.page-faq .faq-collapse_summary:focus-visible .faq-collapse_num {
  color: var(--brand);
  transform: translateY(-2px);
}

.page-faq .faq-collapse[open] .faq-collapse_num {
  color: var(--brand);
}

.page-faq .faq-collapse_q {
  flex: 1 1 auto;
  color: var(--faq-ink);
  font-weight: 700;
  font-size: 0.975rem;
  line-height: 1.45;
}

.page-faq .faq-collapse .collapse_icon {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border: 1px solid rgba(228, 0, 43, 0.5);
  border-radius: 50%;
  color: var(--brand);
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s var(--ease-out), background 0.2s ease, color 0.2s ease;
}

.page-faq .faq-collapse[open] .collapse_icon {
  transform: rotate(45deg);
  background: var(--brand);
  color: var(--white);
}

.page-faq .faq-collapse_body {
  position: relative;
  padding: 1rem 1.1rem 1.3rem 3.2rem;
  color: var(--faq-muted);
  font-size: 0.925rem;
  line-height: 1.75;
  border-top: 1px dashed var(--faq-line);
}

.page-faq .faq-collapse_body::before {
  content: "";
  position: absolute;
  left: 1.6rem;
  top: 1.15rem;
  bottom: 1.15rem;
  width: 3px;
  background: var(--brand);
  border-radius: 99px;
}

.page-faq .faq-collapse[open] > .faq-collapse_body {
  animation: faq-fade-slide 0.35s var(--ease-out);
}

@keyframes faq-fade-slide {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 章节视觉图 ===== */
.page-faq .faq-section_visual {
  margin-top: 1.75rem;
  max-width: 560px;
}

.page-faq .faq-section_visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid var(--faq-line);
  box-shadow: 0 14px 34px rgba(11, 29, 58, 0.1);
}

.page-faq .faq-section_visual::before {
  content: "";
  display: block;
  width: 58px;
  height: 7px;
  background: var(--brand);
  clip-path: polygon(0 0, 100% 0, 84% 100%, 0 100%);
  margin-bottom: 0.7rem;
}

.page-faq .faq-section_visualCaption {
  margin: 0.7rem 0 0;
  font-size: 0.82rem;
  color: var(--faq-muted);
  text-align: right;
}

/* ===== 底部帮助块 ===== */
.page-faq .faq-help {
  position: relative;
  margin-top: 2.5rem;
  background: var(--brand);
  color: var(--white);
  border-radius: 16px;
  padding: 2.75rem 1.5rem 2.5rem;
  text-align: center;
  overflow: hidden;
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.28);
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  width: 150px;
  height: 150px;
  background: rgba(255, 255, 255, 0.12);
  clip-path: polygon(0 0, 100% 0, 82% 100%, 0 100%);
  top: -30px;
  right: -30px;
  pointer-events: none;
}

.page-faq .faq-help::after {
  content: "";
  position: absolute;
  width: 90px;
  height: 90px;
  background: rgba(11, 29, 58, 0.2);
  clip-path: polygon(20% 0, 100% 30%, 80% 100%, 0 70%);
  bottom: -30px;
  left: -20px;
  pointer-events: none;
}

.page-faq .faq-help h2 {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-weight: 800;
  margin: 0 0 0.75rem;
}

.page-faq .faq-help p {
  position: relative;
  z-index: 1;
  max-width: 560px;
  margin: 0 auto 1.6rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.92);
}

.page-faq .faq-help_actions {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.page-faq .faq-help .btn-primary {
  background: var(--white);
  color: var(--brand);
  border: 1px solid var(--white);
}

.page-faq .faq-help .btn-primary:hover,
.page-faq .faq-help .btn-primary:focus {
  background: transparent;
  color: var(--white);
}

.page-faq .faq-help .btn-outline {
  border-color: var(--white);
  color: var(--white);
}

.page-faq .faq-help .btn-outline:hover,
.page-faq .faq-help .btn-outline:focus {
  background: rgba(255, 255, 255, 0.15);
}

/* ===== 桌面增强 ===== */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 3.5rem 0 5rem;
  }

  .page-faq .faq-hero_inner {
    flex-direction: row;
    align-items: center;
    gap: 4.5rem;
  }

  .page-faq .faq-hero_text {
    flex: 1 1 55%;
    max-width: none;
  }

  .page-faq .faq-hero_media {
    flex: 0 1 45%;
    margin-bottom: 0.5rem;
  }

  .page-faq .faq-hero h1 {
    margin-bottom: 1.8rem;
  }

  .page-faq .faq-trust-strip_inner {
    justify-content: flex-start;
    padding-left: 2rem;
  }

  .page-faq .faq-manual_layout {
    display: grid;
    grid-template-columns: 275px 1fr;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 96px;
    align-self: start;
    max-height: calc(100vh - 112px);
    overflow-y: auto;
    padding: 2.25rem 1.75rem;
  }

  .page-faq .faq-toc_nav {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .page-faq .faq-toc_groupTitle a {
    padding: 0;
  }

  .page-faq .faq-answer {
    padding: 3rem 3.5rem;
  }

  .page-faq .faq-collapse_summary {
    padding: 1.1rem 1.4rem;
    gap: 1.15rem;
  }

  .page-faq .faq-collapse_num {
    width: 2.5rem;
    font-size: 1.4rem;
  }

  .page-faq .faq-collapse_q {
    font-size: 1.02rem;
  }

  .page-faq .faq-collapse_body {
    padding: 1.15rem 1.5rem 1.5rem 4.2rem;
  }

  .page-faq .faq-collapse_body::before {
    left: 1.75rem;
  }

  .page-faq .faq-section_num {
    font-size: 1.35rem;
  }

  .page-faq .faq-section_title {
    font-size: 1.8rem;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-manual {
    padding: 5rem 0;
  }

  .page-faq .faq-answer {
    padding: 3.5rem 4rem;
  }
}

/* 移动端目录压缩为章节导航胶囊 */
@media (max-width: 899px) {
  .page-faq .faq-toc_desc {
    display: none;
  }

  .page-faq .faq-toc_nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
  }

  .page-faq .faq-toc_group {
    margin: 0;
    padding: 0;
    border-top: 0;
  }

  .page-faq .faq-toc_groupTitle a {
    display: inline-block;
    padding: 0.4rem 0.85rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    font-size: 0.82rem;
  }

  .page-faq .faq-toc_groupTitle .faq-toc_groupNum {
    font-size: 0.75rem;
  }

  .page-faq .faq-toc_groupTitle .faq-toc_groupName {
    font-size: 0.82rem;
  }

  .page-faq .faq-toc_list {
    display: none;
  }

  .page-faq .faq-toc_contact {
    margin-top: 1rem;
    padding-top: 0.9rem;
  }
}