/* ===== 页面专属 CSS：.page-faq ===== */
.page-faq {
  --faq-accent: #FF6B35;
  --faq-accent-glow: rgba(255, 107, 53, 0.25);
  --faq-bg-card: #0F1A2E;
  --faq-bg-hover: #14203A;
  --faq-border: rgba(255, 255, 255, 0.08);
  --faq-text-dim: #B0B0B0;
  --faq-nav-active-bg: linear-gradient(135deg, #FF6B35 0%, #CC4C1A 100%);
  --faq-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  color: #FFFFFF;
}

/* ---------- Hero 区 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 2rem 0 3rem;
  background: linear-gradient(160deg, #0A192F 0%, #0F1A2E 60%, #1A1A2E 100%);
  overflow: hidden;
  z-index: 1;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -20%;
  width: 70%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(255, 107, 53, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__slash {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 48px;
  background: linear-gradient(100deg, transparent 40%, #FF6B35 40%, #FF6B35 44%, transparent 44%);
  opacity: 0.2;
  z-index: 0;
  pointer-events: none;
}

.page-faq .breadcrumb {
  margin-bottom: 1.25rem;
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.8rem;
  font-family: var(--font-body, "Roboto", sans-serif);
  color: var(--faq-text-dim);
}

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

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: #FFFFFF;
  text-decoration: underline;
}

.page-faq .breadcrumb li:not(:last-child)::after {
  content: "›";
  margin-left: 0.4rem;
  color: #555;
}

.page-faq .breadcrumb [aria-current="page"] {
  color: #FFFFFF;
  font-weight: 600;
}

.page-faq .faq-hero__title {
  font-family: var(--font-heading, Impact, "Arial Black", sans-serif);
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  line-height: 1.05;
  margin: 0 0 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, #FF6B35 0%, #FF8C5A 60%, #FFFFFF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__desc {
  font-family: var(--font-body, "Roboto", sans-serif);
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--faq-text-dim);
  max-width: 520px;
  margin: 0 0 1.4rem;
  position: relative;
  z-index: 1;
}

/* ---- 搜索框 ---- */
.page-faq .faq-search {
  position: relative;
  max-width: 480px;
  z-index: 1;
}

.page-faq .faq-search__input {
  display: block;
  width: 100%;
  padding: 0.85rem 1.2rem 0.85rem 3rem;
  font-family: var(--font-body, "Roboto", sans-serif);
  font-size: 0.95rem;
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--faq-border);
  border-radius: 60px;
  outline: none;
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.page-faq .faq-search__input::placeholder {
  color: #666;
}

.page-faq .faq-search__input:focus {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--faq-accent);
  box-shadow: 0 0 0 3px var(--faq-accent-glow);
}

.page-faq .faq-search__icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: #777;
  pointer-events: none;
  width: 20px;
  height: 20px;
}

/* ---------- 主内容区 ---------- */
.page-faq .faq-body {
  padding: 2.5rem 0 3rem;
  background: #0A192F;
}

/* ---------- 布局：左侧导航 + 右侧内容 ---------- */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: relative;
}

/* 隐藏 radio */
.page-faq .faq-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ---------- 左侧导航 ---------- */
.page-faq .faq-nav {
  flex-shrink: 0;
  position: relative;
  z-index: 2;
}

.page-faq .faq-nav__list {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0.5rem 0 0.5rem 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-faq .faq-nav__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-nav__label {
  display: inline-block;
  padding: 0.55rem 1.2rem;
  font-family: var(--font-body, "Roboto", sans-serif);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--faq-text-dim);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--faq-border);
  border-radius: 30px;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  transition: background 0.3s, color 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.page-faq .faq-nav__label:hover {
  background: rgba(255, 107, 53, 0.12);
  border-color: rgba(255, 107, 53, 0.3);
  color: #FFFFFF;
}

.page-faq .faq-nav__label:focus-visible {
  outline: 2px solid var(--faq-accent);
  outline-offset: 2px;
}

/* 选中状态 — 通过 radio:checked + 兄弟选择器控制 */
#cat-all:checked ~ .faq-nav .faq-nav__list label[for="cat-all"],
#cat-services:checked ~ .faq-nav .faq-nav__list label[for="cat-services"],
#cat-follow:checked ~ .faq-nav .faq-nav__list label[for="cat-follow"],
#cat-versions:checked ~ .faq-nav .faq-nav__list label[for="cat-versions"],
#cat-other:checked ~ .faq-nav .faq-nav__list label[for="cat-other"] {
  background: var(--faq-nav-active-bg);
  color: #FFFFFF;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.35);
}

/* 装饰斜线 */
.page-faq .faq-nav__deco {
  display: none;
}

/* ---------- 右侧内容区 ---------- */
.page-faq .faq-items {
  flex: 1;
  min-width: 0;
}

/* --- 分类组：默认全部显示，选中分类时只显示对应组 --- */
.page-faq .faq-group {
  display: block;
}

/* 默认「全部」选中时所有组显示 */
#cat-all:checked ~ .faq-items .faq-group {
  display: block;
}

/* 特定分类选中时，只显示对应组 */
#cat-services:checked ~ .faq-items .faq-group[data-category="services"],
#cat-follow:checked ~ .faq-items .faq-group[data-category="follow"],
#cat-versions:checked ~ .faq-items .faq-group[data-category="versions"],
#cat-other:checked ~ .faq-items .faq-group[data-category="other"] {
  display: block;
}

#cat-services:checked ~ .faq-items .faq-group:not([data-category="services"]),
#cat-follow:checked ~ .faq-items .faq-group:not([data-category="follow"]),
#cat-versions:checked ~ .faq-items .faq-group:not([data-category="versions"]),
#cat-other:checked ~ .faq-items .faq-group:not([data-category="other"]) {
  display: none;
}

/* ---------- 手风琴单项 ---------- */
.page-faq .faq-item {
  margin-bottom: 0.75rem;
  background: var(--faq-bg-card);
  border: 1px solid var(--faq-border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.page-faq .faq-item:hover {
  border-color: rgba(255, 107, 53, 0.2);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.page-faq .faq-item[open] {
  border-color: rgba(255, 107, 53, 0.3);
  box-shadow: 0 4px 28px rgba(255, 107, 53, 0.08);
}

/* --- 问题标题 (summary) --- */
.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.2rem;
  font-family: var(--font-body, "Roboto", sans-serif);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  color: #FFFFFF;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background 0.3s;
}

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

.page-faq .faq-item__q::marker {
  display: none;
  content: "";
}

.page-faq .faq-item__q:hover {
  background: var(--faq-bg-hover);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--faq-accent);
  outline-offset: -2px;
}

/* Q 图标 */
.page-faq .faq-item__icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--faq-accent);
  border-radius: 50%;
  font-family: var(--font-heading, Impact, "Arial Black", sans-serif);
  font-size: 0.8rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1;
}

/* 箭头 */
.page-faq .faq-item__arrow {
  flex-shrink: 0;
  margin-left: auto;
  width: 20px;
  height: 20px;
  position: relative;
  transition: transform 0.35s ease;
}

.page-faq .faq-item__arrow::before,
.page-faq .faq-item__arrow::after {
  content: "";
  position: absolute;
  background: #BBB;
  border-radius: 2px;
  transition: background 0.3s, transform 0.35s ease;
}

.page-faq .faq-item__arrow::before {
  top: 9px;
  left: 2px;
  width: 16px;
  height: 2px;
}

.page-faq .faq-item__arrow::after {
  top: 2px;
  left: 9px;
  width: 2px;
  height: 16px;
}

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

.page-faq .faq-item[open] .faq-item__arrow::before,
.page-faq .faq-item[open] .faq-item__arrow::after {
  background: var(--faq-accent);
}

/* --- 答案内容 --- */
.page-faq .faq-item__a {
  padding: 0 1.2rem 1.2rem;
  font-family: var(--font-body, "Roboto", sans-serif);
  font-size: 0.92rem;
  line-height: 1.7;
  color: #D0D0D0;
  animation: faqFadeIn 0.35s ease;
}

@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-item__a p {
  margin: 0 0 0.8rem;
}

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

.page-faq .faq-item__a ul {
  margin: 0.5rem 0 0.8rem;
  padding-left: 1.4rem;
}

.page-faq .faq-item__a li {
  margin-bottom: 0.35rem;
}

.page-faq .faq-item__a strong {
  color: var(--faq-accent);
  font-weight: 600;
}

.page-faq .faq-item__link {
  color: var(--faq-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}

.page-faq .faq-item__link:hover,
.page-faq .faq-item__link:focus-visible {
  color: #FF8C5A;
}

/* --- 图片 --- */
.page-faq .faq-item__img-wrap {
  margin-top: 1rem;
  border-radius: 8px;
  overflow: hidden;
  background: #000;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.page-faq .faq-item__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 600 / 400;
}

.page-faq .faq-item__img-caption {
  display: block;
  padding: 0.4rem 0.8rem 0.6rem;
  font-size: 0.75rem;
  color: #777;
  background: rgba(0, 0, 0, 0.3);
  text-align: center;
}

/* ---------- CTA ---------- */
.page-faq .faq-cta {
  padding: 2.5rem 0 3rem;
  background: linear-gradient(180deg, #0A192F 0%, #0F1A2E 100%);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.page-faq .faq-cta__text {
  font-family: var(--font-body, "Roboto", sans-serif);
  font-size: 1.05rem;
  color: var(--faq-text-dim);
  margin: 0 0 1.2rem;
}

.page-faq .faq-cta__btn {
  display: inline-block;
  padding: 0.85rem 2.4rem;
  font-family: var(--font-body, "Roboto", sans-serif);
  font-size: 1rem;
  font-weight: 700;
  color: #FFFFFF;
  background: linear-gradient(135deg, #FF6B35 0%, #CC4C1A 100%);
  border: none;
  border-radius: 60px;
  cursor: pointer;
  text-decoration: none;
  transition: box-shadow 0.3s, transform 0.2s;
  box-shadow: 0 4px 20px rgba(255, 107, 53, 0.3);
}

.page-faq .faq-cta__btn:hover,
.page-faq .faq-cta__btn:focus-visible {
  box-shadow: 0 6px 28px rgba(255, 107, 53, 0.5);
  transform: translateY(-2px);
}

/* ===================================================
   桌面端 (≥768px)
   =================================================== */
@media (min-width: 768px) {
  .page-faq .faq-hero {
    padding: 3rem 0 4.5rem;
  }

  .page-faq .faq-hero__slash {
    height: 64px;
    background: linear-gradient(100deg, transparent 42%, #FF6B35 42%, #FF6B35 45%, transparent 45%);
    opacity: 0.25;
  }

  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 2.5rem;
  }

  /* 左侧导航 — 垂直列表 */
  .page-faq .faq-nav {
    position: sticky;
    top: calc(var(--header-height, 64px) + 1.5rem);
    width: 220px;
    flex-shrink: 0;
  }

  .page-faq .faq-nav__list {
    flex-direction: column;
    gap: 0.35rem;
    padding: 0;
    overflow: visible;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--faq-border);
    border-radius: 12px;
    padding: 0.6rem;
  }

  .page-faq .faq-nav__label {
    display: block;
    padding: 0.7rem 1rem;
    border-radius: 8px;
    border: 1px solid transparent;
    font-size: 0.9rem;
    white-space: normal;
    text-align: left;
  }

  /* 选中态 */
  #cat-all:checked ~ .faq-nav .faq-nav__list label[for="cat-all"],
  #cat-services:checked ~ .faq-nav .faq-nav__list label[for="cat-services"],
  #cat-follow:checked ~ .faq-nav .faq-nav__list label[for="cat-follow"],
  #cat-versions:checked ~ .faq-nav .faq-nav__list label[for="cat-versions"],
  #cat-other:checked ~ .faq-nav .faq-nav__list label[for="cat-other"] {
    background: var(--faq-nav-active-bg);
    color: #FFFFFF;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(255, 107, 53, 0.35);
  }

  /* 装饰斜线 */
  .page-faq .faq-nav__deco {
    display: block;
    height: 4px;
    margin-top: 1rem;
    background: linear-gradient(90deg, transparent 0%, var(--faq-accent) 30%, transparent 70%);
    opacity: 0.3;
    border-radius: 2px;
  }

  /* 右侧内容区 */
  .page-faq .faq-items {
    flex: 1;
    min-width: 0;
  }

  .page-faq .faq-item__q {
    padding: 1.1rem 1.4rem;
    font-size: 1rem;
  }

  .page-faq .faq-item__a {
    padding: 0 1.4rem 1.4rem;
    font-size: 0.95rem;
  }

  .page-faq .faq-cta {
    padding: 3rem 0 4rem;
  }
}

/* ===================================================
   大桌面端 (≥1024px)
   =================================================== */
@media (min-width: 1024px) {
  .page-faq .faq-nav {
    width: 250px;
  }

  .page-faq .faq-nav__list {
    padding: 0.8rem;
  }

  .page-faq .faq-nav__label {
    padding: 0.8rem 1.2rem;
    font-size: 0.95rem;
  }

  .page-faq .faq-item__q {
    padding: 1.2rem 1.6rem;
    font-size: 1.05rem;
  }

  .page-faq .faq-item__a {
    padding: 0 1.6rem 1.6rem;
  }

  .page-faq .faq-hero__title {
    font-size: 4rem;
  }
}