/*
 * 衍影法务文档样式。
 * 方向：编辑排版（editorial）—— 长文阅读优先，中文衬线标题、
 * 克制的琥珀色强调。不做营销页式的渐变与装饰。
 */

:root {
  color-scheme: light dark;

  --color-bg: oklch(98.5% 0.004 85);
  --color-surface: oklch(100% 0 0);
  --color-text: oklch(24% 0.01 60);
  --color-text-secondary: oklch(45% 0.012 60);
  --color-text-tertiary: oklch(58% 0.012 60);
  --color-hairline: oklch(90% 0.006 70);
  --color-accent: oklch(62% 0.14 65);
  --color-accent-soft: oklch(95% 0.03 80);

  --font-body: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB',
    'Noto Sans CJK SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --font-display: 'Songti SC', 'Noto Serif CJK SC', Georgia, 'Times New Roman', serif;

  --space-page: clamp(1.25rem, 1rem + 2vw, 3rem);
  --measure: 42rem;
  --radius-card: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: oklch(19% 0.008 60);
    --color-surface: oklch(24% 0.01 60);
    --color-text: oklch(93% 0.006 80);
    --color-text-secondary: oklch(79% 0.008 70);
    --color-text-tertiary: oklch(66% 0.01 70);
    --color-hairline: oklch(34% 0.012 60);
    --color-accent: oklch(76% 0.12 75);
    --color-accent-soft: oklch(29% 0.03 60);
  }
}

* { box-sizing: border-box; }

html { scroll-padding-top: 5rem; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  /* 中文长文不两端对齐：避免标点与英文混排时出现过大字缝 */
  text-align: left;
  overflow-wrap: break-word;
}

a { color: var(--color-accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-surface);
  padding: 0.6rem 1rem;
  z-index: 10;
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

/* ---- 页头 ---- */

.site-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: baseline;
  justify-content: space-between;
  padding: 1.5rem var(--space-page);
  border-bottom: 1px solid var(--color-hairline);
}

.brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.04em;
}
.brand span {
  margin-left: 0.75rem;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--color-text-tertiary);
}

.site-nav { display: flex; gap: 1.25rem; }
.site-nav a {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.site-nav a:hover { color: var(--color-text); border-bottom-color: var(--color-hairline); }
.site-nav a[aria-current='page'] { color: var(--color-accent); border-bottom-color: var(--color-accent); }

/* ---- 布局 ---- */

.layout {
  display: grid;
  grid-template-columns: minmax(0, var(--measure)) minmax(0, 17rem);
  gap: clamp(2rem, 1rem + 4vw, 4.5rem);
  align-items: start;
  max-width: 76rem;
  margin: 0 auto;
  padding: clamp(2rem, 1rem + 3vw, 4rem) var(--space-page) 4rem;
}
.layout.single { grid-template-columns: minmax(0, var(--measure)); }

.sidebar { position: sticky; top: 2rem; display: grid; gap: 1.5rem; }

/* ---- 正文排版 ---- */

.document h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 1.4rem + 2.4vw, 2.9rem);
  line-height: 1.3;
  letter-spacing: 0.02em;
  margin: 0 0 1.5rem;
}

.document h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  line-height: 1.5;
  margin: 3rem 0 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-hairline);
}
/* 第一个 h2 不再加分割线，避免与标题下方留白重复 */
.document h2:first-of-type { border-top: none; padding-top: 0; }

.document h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--color-text);
}

.document p { margin: 0 0 1.1rem; color: var(--color-text-secondary); }
.document strong { color: var(--color-text); font-weight: 600; }

.document ul,
.document ol { margin: 0 0 1.25rem; padding-left: 1.4rem; color: var(--color-text-secondary); }
.document li { margin-bottom: 0.45rem; }
.document li::marker { color: var(--color-text-tertiary); }

.document hr {
  border: none;
  border-top: 1px solid var(--color-hairline);
  margin: 2.5rem 0;
}

.document blockquote {
  margin: 1.5rem 0;
  padding: 0.9rem 1.15rem;
  background: var(--color-accent-soft);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
}
.document blockquote p { margin: 0; color: var(--color-text); }

.document code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: var(--color-accent-soft);
  padding: 0.12em 0.35em;
  border-radius: 4px;
  word-break: break-all;
}

/* 表格：信息收集清单与 SDK 清单是审核人员最关注的部分，必须完整可读。
   display:block + overflow-x:auto 让宽表在手机上可横向滚动而不撑破版心。 */
.document table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0 1.75rem;
  font-size: 0.9rem;
  line-height: 1.7;
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
  display: block;
  overflow-x: auto;
}
.document th,
.document td {
  text-align: left;
  vertical-align: top;
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--color-hairline);
  min-width: 6rem;
}
.document th {
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-accent-soft);
  white-space: nowrap;
}
.document td { color: var(--color-text-secondary); }
.document tr:last-child td { border-bottom: none; }

/* ---- 目录与联系卡 ---- */

.toc {
  padding: 1.15rem 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
}
.toc-title {
  margin: 0 0 0.6rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--color-text-tertiary);
}
.toc ol { margin: 0; padding-left: 1.1rem; }
.toc li { margin-bottom: 0.4rem; font-size: 0.85rem; line-height: 1.6; }
.toc a { color: var(--color-text-secondary); text-decoration: none; }
.toc a:hover { color: var(--color-accent); }

.contact-card {
  padding: 1.15rem 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
}
.contact-card p { margin: 0 0 0.6rem; font-size: 0.85rem; color: var(--color-text-secondary); }
.contact-title { font-weight: 600; color: var(--color-text) !important; }
.contact-link { font-size: 0.95rem; font-weight: 600; word-break: break-all; }
.contact-note { margin: 0.6rem 0 0 !important; font-size: 0.78rem !important; color: var(--color-text-tertiary) !important; }

/* ---- 首页 ---- */

.lede { font-size: 1.05rem; }
.doc-list { display: grid; gap: 1rem; margin: 2rem 0; }
.doc-card {
  display: block;
  padding: 1.4rem 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease;
}
.doc-card:hover { border-color: var(--color-accent); transform: translateY(-2px); }
.doc-card h2 {
  font-family: var(--font-display);
  border: none;
  margin: 0 0 0.4rem;
  padding: 0;
  font-size: 1.3rem;
  color: var(--color-text);
}
.doc-card p { margin: 0 0 0.75rem; font-size: 0.9rem; }
.doc-card-cta { font-size: 0.85rem; color: var(--color-accent); }

/* ---- 页脚 ---- */

.site-footer {
  padding: 2rem var(--space-page) 3rem;
  border-top: 1px solid var(--color-hairline);
}
.site-footer p { margin: 0 0 0.35rem; font-size: 0.8rem; color: var(--color-text-tertiary); }

/* ---- 响应式 ---- */

@media (max-width: 60rem) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  /* 目录移到正文之前：手机上先看到结构，比读完才发现有目录更有用 */
  .sidebar { position: static; order: -1; }
  .toc ol { columns: 2; column-gap: 1.5rem; }
}

@media (max-width: 30rem) {
  .toc ol { columns: 1; }
  .document table { font-size: 0.82rem; }
  /* 小屏取消单元格最小宽度，否则三列表格会被挤成一行两个字 */
  .document th,
  .document td { min-width: 0; padding: 0.55rem 0.6rem; }
}

/* ---- 打印 ---- */

@media print {
  .site-header, .sidebar, .site-footer, .skip-link { display: none; }
  .layout { display: block; padding: 0; max-width: none; }
  body { background: #fff; color: #000; font-size: 11pt; }
  .document h2 { break-after: avoid; }
  .document table, .document blockquote { break-inside: avoid; }
}