/* ===== 常见问答页专属样式 ===== */
.page-faq {
  --faq-card-bg: rgba(255, 255, 255, 0.025);
  --faq-line: rgba(45, 159, 255, 0.16);
  --faq-line-strong: rgba(45, 159, 255, 0.32);
  --faq-shadow: 0 16px 40px rgba(0, 0, 0, 0.38);
  --faq-radius: 14px;
  --faq-indigo: #9B6BFF;
  --faq-wine: #FF5E8A;
  background: var(--bg-deep);
}

/* 辅助隐藏 */
.page-faq .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* 面包屑 */
.page-faq .breadcrumb {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 14px;
}
.page-faq .breadcrumb a {
  color: var(--accent-blue);
  text-decoration: none;
}
.page-faq .breadcrumb a:hover {
  text-decoration: underline;
}
.page-faq .breadcrumb__sep {
  margin: 0 6px;
  color: var(--text-secondary);
}

/* ===== Hero 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 36px 0 32px;
  border-bottom: 1px solid rgba(45, 159, 255, 0.12);
  background:
    radial-gradient(circle at 88% 12%, rgba(91, 45, 138, 0.3), transparent 38%),
    radial-gradient(circle at 15% 90%, rgba(15, 59, 70, 0.55), transparent 44%),
    var(--bg-deep);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(45, 159, 255, 0.08);
  filter: blur(10px);
  pointer-events: none;
}
.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: 28px;
}
.page-faq .faq-hero__content {
  max-width: 720px;
}
.page-faq .faq-hero h1 {
  margin: 14px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 6vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  font-weight: 800;
}
.page-faq .faq-hero__lead {
  margin: 0;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}

/* 搜索框 */
.page-faq .faq-search {
  position: relative;
  margin-top: 24px;
}
.page-faq .faq-search::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  width: 16px;
  height: 16px;
  border: 2px solid var(--text-secondary);
  border-radius: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  box-sizing: border-box;
}
.page-faq .faq-search::after {
  content: "";
  position: absolute;
  left: 28px;
  top: 50%;
  width: 2px;
  height: 8px;
  background: var(--text-secondary);
  transform: translateY(3px) rotate(-45deg);
  pointer-events: none;
  border-radius: 2px;
}
.page-faq .faq-search input {
  display: block;
  width: 100%;
  max-width: 560px;
  height: 52px;
  padding: 0 18px 0 44px;
  border: 1px solid var(--faq-line-strong);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.045);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  outline: none;
  box-sizing: border-box;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.page-faq .faq-search input::placeholder {
  color: var(--text-secondary);
}
.page-faq .faq-search input:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 4px rgba(45, 159, 255, 0.2);
}

/* Hero 数据亮点 */
.page-faq .faq-hero__stats {
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  color: var(--text-secondary);
  font-size: 13px;
}
.page-faq .faq-hero__stat {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
}
.page-faq .faq-hero__stat b {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--accent-green);
}

/* Hero 插画 */
.page-faq .faq-hero__visual img {
  display: block;
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: var(--faq-radius);
  box-shadow: var(--faq-shadow);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* ===== 主体布局 ===== */
.page-faq .faq-layout {
  padding: 28px 0 80px;
}

/* 侧边索引 */
.page-faq .faq-side__card {
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-line);
  border-radius: var(--faq-radius);
  padding: 22px;
}
.page-faq .faq-side__card h2 {
  margin: 0 0 14px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
}
.page-faq .faq-side__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-faq .faq-side__list li {
  margin: 0;
}
.page-faq .faq-side__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(45, 159, 255, 0.06);
  border: 1px solid rgba(45, 159, 255, 0.16);
  color: var(--text-primary);
  font-size: 14px;
  text-decoration: none;
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}
.page-faq .faq-side__list a:hover {
  background: rgba(45, 159, 255, 0.14);
  border-color: var(--faq-line-strong);
  transform: translateY(-1px);
}
.page-faq .faq-side__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.page-faq .faq-side__dot--indigo { background: var(--faq-indigo); }
.page-faq .faq-side__dot--wine { background: var(--faq-wine); }
.page-faq .faq-side__dot--green { background: var(--accent-green); }
.page-faq .faq-side__dot--orange { background: var(--accent-orange); }
.page-faq .faq-side__dot--neutral { background: var(--text-secondary); }

.page-faq .faq-side__help {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}
.page-faq .faq-side__help p {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 问答区域 */
.page-faq .faq-answers {
  margin-top: 40px;
}

/* ===== 分类区块 ===== */
.page-faq .faq-block {
  margin-bottom: 52px;
  padding: 24px 0;
  border-radius: var(--faq-radius);
}
.page-faq .faq-block:last-child {
  margin-bottom: 0;
}
.page-faq .faq-block--indigo {
  background: linear-gradient(180deg, rgba(155, 107, 255, 0.06), transparent 130px);
}
.page-faq .faq-block--wine {
  background: linear-gradient(180deg, rgba(255, 94, 138, 0.05), transparent 130px);
}
.page-faq .faq-block--green {
  background: linear-gradient(180deg, rgba(198, 255, 0, 0.04), transparent 130px);
}
.page-faq .faq-block--orange {
  background: linear-gradient(180deg, rgba(255, 106, 0, 0.05), transparent 130px);
}
.page-faq .faq-block--neutral {
  background: transparent;
}

.page-faq .faq-block__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 18px;
  padding-left: 16px;
  border-left: 4px solid var(--accent-blue);
}
.page-faq .faq-block--indigo .faq-block__head { border-left-color: var(--faq-indigo); }
.page-faq .faq-block--wine .faq-block__head { border-left-color: var(--faq-wine); }
.page-faq .faq-block--green .faq-block__head { border-left-color: var(--accent-green); }
.page-faq .faq-block--orange .faq-block__head { border-left-color: var(--accent-orange); }
.page-faq .faq-block--neutral .faq-block__head { border-left-color: var(--text-secondary); }

.page-faq .faq-block__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent-blue);
  background: rgba(45, 159, 255, 0.08);
  padding: 4px 8px;
  border-radius: 6px;
  margin-top: 2px;
  white-space: nowrap;
}
.page-faq .faq-block--indigo .faq-block__num {
  background: rgba(155, 107, 255, 0.12);
  color: #C9AEFF;
}
.page-faq .faq-block--wine .faq-block__num {
  background: rgba(255, 94, 138, 0.12);
  color: #FFB3C9;
}
.page-faq .faq-block--green .faq-block__num {
  background: rgba(198, 255, 0, 0.1);
  color: var(--accent-green);
}
.page-faq .faq-block--orange .faq-block__num {
  background: rgba(255, 106, 0, 0.12);
  color: #FFB27D;
}
.page-faq .faq-block--neutral .faq-block__num {
  background: rgba(136, 144, 168, 0.12);
  color: var(--text-secondary);
}

.page-faq .faq-block__head h2 {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 750;
  color: var(--text-primary);
}
.page-faq .faq-block__head p {
  margin: 0;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
}
.page-faq .faq-block__head p a {
  color: var(--accent-blue);
  text-decoration: none;
}
.page-faq .faq-block__head p a:hover {
  text-decoration: underline;
}

/* ===== 手风琴面板 ===== */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}
.page-faq .faq-item {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden;
  transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}
.page-faq .faq-item summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 16px 48px 16px 18px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary::before,
.page-faq .faq-item summary::after {
  content: '';
  position: absolute;
  right: 18px;
  top: 50%;
  background: var(--accent-blue);
  border-radius: 2px;
  transition: transform var(--transition-smooth), opacity var(--transition-smooth);
}
.page-faq .faq-item summary::before {
  width: 14px;
  height: 2px;
  transform: translateY(-50%);
}
.page-faq .faq-item summary::after {
  width: 2px;
  height: 14px;
  transform: translateY(-50%);
}
.page-faq .faq-item[open] summary::after {
  opacity: 0;
  transform: translateY(-50%) rotate(90deg);
}
.page-faq .faq-item summary:hover {
  background: rgba(45, 159, 255, 0.06);
}
.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: -2px;
}
.page-faq .faq-item[open] {
  border-color: var(--faq-line-strong);
  background: rgba(45, 159, 255, 0.03);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}
.page-faq .faq-item[open] summary {
  color: #ffffff;
}
.page-faq .faq-item__body {
  padding: 2px 20px 18px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.75;
}
.page-faq .faq-item__body p {
  margin: 0;
}
.page-faq .faq-item__body a {
  color: var(--accent-blue);
  text-decoration: none;
}
.page-faq .faq-item__body a:hover {
  text-decoration: underline;
}

/* ===== 下载指引图（分栏布局） ===== */
.page-faq .faq-list--split {
  display: grid;
  gap: 20px;
}
.page-faq .faq-list__main {
  display: grid;
  gap: 10px;
}
.page-faq .faq-list__visual {
  position: relative;
  border-radius: var(--faq-radius);
  overflow: hidden;
  border: 1px solid rgba(198, 255, 0, 0.18);
  background: linear-gradient(140deg, rgba(15, 59, 70, 0.5), rgba(10, 11, 16, 0.6));
  padding: 10px;
}
.page-faq .faq-list__visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
}
.page-faq .faq-list__visual::after {
  content: "V3 下载指引";
  position: absolute;
  left: 22px;
  bottom: 22px;
  padding: 5px 10px;
  background: var(--accent-green);
  color: #0A0B10;
  font-size: 12px;
  font-weight: 700;
  border-radius: 5px;
  letter-spacing: 0.04em;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 64px 0 48px;
  }
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 48px;
  }
  .page-faq .faq-hero__lead {
    font-size: 16px;
  }

  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
    padding-top: 40px;
  }
  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
  .page-faq .faq-side__list {
    flex-direction: column;
    gap: 2px;
  }
  .page-faq .faq-side__list a {
    border-radius: 8px;
    border-color: transparent;
    background: transparent;
    padding: 9px 12px;
  }
  .page-faq .faq-side__list a:hover {
    background: rgba(45, 159, 255, 0.1);
    border-color: transparent;
    transform: none;
  }

  .page-faq .faq-answers {
    margin-top: 0;
  }
  .page-faq .faq-block {
    padding: 28px 0;
    margin-bottom: 44px;
  }
  .page-faq .faq-block__head h2 {
    font-size: 23px;
  }
  .page-faq .faq-list--split {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 24px;
  }
}