*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #faf9f7;
  --text: #1c1c1e;
  --text-secondary: #6b6b70;
  --accent: #7c6aef;
  --border: #e5e5ea;
  --max-width: 720px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  padding: 0 20px;
  -webkit-text-size-adjust: 100%;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 0 64px;
}

h1 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 8px;
}

p, li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

ul {
  padding-left: 20px;
  margin-bottom: 12px;
}

li { margin-bottom: 4px; }

.meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-align: center;
}

.footer a {
  color: var(--accent);
  text-decoration: none;
}

.lang-switcher {
  position: relative;
  display: inline-block;
  float: right;
  margin-bottom: 20px;
}

.lang-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  font-size: 0.82rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  line-height: 1.4;
}

.lang-trigger:hover { border-color: var(--accent); color: var(--accent); }
.lang-trigger .lang-globe { font-size: 0.95rem; }
.lang-trigger .lang-caret { font-size: 0.6rem; opacity: 0.7; }

.lang-menu {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 130px;
  padding: 4px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  z-index: 50;
}

.lang-menu.open { display: block; }

.lang-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 12px;
  border: none;
  border-radius: 6px;
  background: transparent;
  width: 100%;
  text-align: left;
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}

.lang-option:hover { background: var(--bg); color: var(--text); }
.lang-option.active { color: var(--accent); font-weight: 600; }
.lang-option .lang-check { opacity: 0; font-size: 0.85rem; }
.lang-option.active .lang-check { opacity: 1; }

.lang-content { display: none; }
.lang-content[data-lang="zh-Hans"] { display: block; }
html.js .lang-content { display: none; }
html.js .lang-content.active { display: block; }

a { color: var(--accent); }

@media (max-width: 480px) {
  .container { padding: 32px 0 48px; }
  h1 { font-size: 1.4rem; }
  h2 { font-size: 1.05rem; }
}

/* ==================== Support 页专用样式 ==================== */

/* 锚点导航：普通横向链接条 */
.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.toc a {
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 3px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.toc a:hover { color: var(--accent); }

/* FAQ 板块 */
.faq-section { margin-bottom: 36px; scroll-margin-top: 24px; }
.faq-section h2 { margin-top: 0; }

/* 折叠 FAQ（原生 details，极简） */
.faq {
  border-bottom: 1px solid var(--border);
  margin: 0;
}
.faq > summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 0;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq > summary::-webkit-details-marker { display: none; }
.faq > summary::after {
  content: '+';
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-secondary);
  flex-shrink: 0;
  line-height: 1;
}
.faq[open] > summary::after { content: '−'; }
.faq-body { padding: 0 0 14px; }
.faq-body p,
.faq-body li { color: var(--text-secondary); }

@media (max-width: 480px) {
  .toc {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .toc::-webkit-scrollbar { display: none; }
}