/* ============================================================
   徽标式首页主题 · 参考工业品牌国际站的版式语言
   原则：首页做品牌化，文章页保持文档可读性
   ============================================================ */

:root {
  --ink: #0B0B0C;
  --ink-2: #14161A;
  --ink-3: #1D2026;
  --paper: #FFFFFF;
  --paper-2: #F5F6F7;
  --accent: #2D6CDF;
  --accent-hover: #1F55B8;
  --accent-dim: rgba(45, 108, 223, .10);
  --muted: #8A9099;
  --line: rgba(11, 11, 12, .10);
  --line-dark: rgba(255, 255, 255, .12);
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --theme-color: #2D6CDF;
}

/* ---------- 全局微调（作用于所有页面） ---------- */

.markdown-section {
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.85;
  color: #24262B;
}

.markdown-section h1,
.markdown-section h2,
.markdown-section h3 {
  font-family: var(--sans);
  letter-spacing: -0.01em;
  color: #111318;
}

.markdown-section h1 { font-size: 1.9em; font-weight: 600; }
.markdown-section h2 {
  font-size: 1.35em; font-weight: 600;
  padding-bottom: .35em;
  border-bottom: 1px solid var(--line);
}
.markdown-section h3 { font-size: 1.1em; font-weight: 600; }

.markdown-section a { color: var(--accent); }
.markdown-section a:hover { border-bottom-color: var(--accent); }

.markdown-section blockquote {
  border-left: 3px solid var(--accent);
  background: var(--paper-2);
  color: #4A4F57;
  padding: .7em 1em;
}

.markdown-section code {
  font-family: var(--mono);
  font-size: .88em;
  background: rgba(11, 11, 12, .05);
  border-radius: 4px;
}

.markdown-section pre > code {
  background: var(--ink);
  color: #E6E8EB;
  font-size: .84em;
  line-height: 1.7;
}

.markdown-section table { font-size: .95em; }
.markdown-section th {
  background: var(--paper-2);
  font-weight: 600;
  border-color: var(--line);
}
.markdown-section td { border-color: var(--line); }

.sidebar {
  font-family: var(--sans);
  border-right: 1px solid var(--line);
}
.sidebar ul li a { color: #4A4F57; font-size: 14px; }
.sidebar ul li a:hover { color: var(--accent); }
.sidebar ul li.active > a { color: var(--accent); font-weight: 600; }

/* 二级目录：细刻度代替整块色条（几何属性强制覆盖，避免受主题原规则影响） */
.app-sub-sidebar li::before {
  content: "" !important;
  float: left !important;
  width: 9px !important;
  height: 1px !important;
  min-height: 0 !important;
  max-height: 1px !important;
  margin: .95em 10px 0 0 !important;
  padding: 0 !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: rgba(11, 13, 16, .22) !important;
  transition: width .2s ease, background .2s ease;
}
.app-sub-sidebar li { border-left: 0 !important; }
.app-sub-sidebar li a {
  color: #6B7280;
  font-size: 13px;
}
.app-sub-sidebar li.active a {
  color: #1D2026;
  font-weight: 500;
}
.app-sub-sidebar li.active::before,
.app-sub-sidebar li:hover::before {
  width: 14px !important;
  background: var(--accent) !important;
}

/* ---------- 首页：品牌化版式 ---------- */

body.lp-home .sidebar { display: none; }
body.lp-home .sidebar-toggle { display: none; }
body.lp-home .content { left: 0; padding-top: 0; }
body.lp-home .markdown-section {
  max-width: 100%;
  padding: 0;
  font-size: 16px;
}
body.lp-home .search { display: none; }

.lp {
  --pad: clamp(24px, 6vw, 96px);
}

/* 首屏 */

.lp-hero {
  position: relative;
  background: var(--ink);
  color: #fff;
  padding: clamp(72px, 11vw, 132px) var(--pad) clamp(56px, 8vw, 88px);
  overflow: hidden;
}
/* 点阵纹理：极低对比，只为质感，不做装饰 */
.lp-hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.055) 1px, transparent 1px);
  background-size: 22px 22px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, rgba(0,0,0,.4) 58%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0,0,0,.4) 58%, transparent 100%);
  pointer-events: none;
}
.lp-hero > * { position: relative; z-index: 1; }
.lp-hero::after {
  content: "";
  position: absolute; right: -12%; top: -28%;
  width: 62vw; height: 62vw; max-width: 780px; max-height: 780px;
  background: radial-gradient(circle, rgba(45,108,223,.20) 0%, rgba(45,108,223,0) 68%);
  pointer-events: none;
}
.lp-eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--mono);
  font-size: 11px; letter-spacing: .22em; text-transform: uppercase;
  color: rgba(255,255,255,.5);
  margin-bottom: clamp(28px, 4vw, 44px);
}
.lp-eyebrow::before {
  content: ""; width: 28px; height: 1px; background: var(--accent);
}
.lp-hero h1 {
  margin: 0;
  font-size: clamp(30px, 5.4vw, 62px);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: #fff;
  max-width: 15em;
}
.lp-hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.lp-hero .lead {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 34em;
  font-size: clamp(14px, 1.4vw, 16.5px);
  line-height: 1.9;
  color: rgba(255,255,255,.66);
}

.lp-nav {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: clamp(30px, 4vw, 44px);
}
.lp-nav a {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 18px;
  border: 1px solid var(--line-dark);
  border-radius: 2px;
  font-size: 13.5px;
  color: rgba(255,255,255,.86);
  text-decoration: none;
  transition: border-color .2s, background .2s, color .2s;
}
.lp-nav a:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: #fff;
  border-bottom-color: var(--accent);
}
.lp-nav a.is-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.lp-nav a.is-primary:hover { background: var(--accent-hover); }

/* 数字条 */

.lp-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--line-dark);
  border-top: 1px solid var(--line-dark);
  margin-top: clamp(40px, 6vw, 64px);
}
.lp-stats > div {
  background: var(--ink);
  padding: 24px 4px 6px;
}
.lp-stats b {
  display: block;
  font-family: var(--mono);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 500;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: #fff;
  line-height: 1.1;
}
.lp-stats b i {
  font-style: normal;
  font-size: .48em;
  color: var(--accent);
  margin-left: 3px;
}
.lp-stats span {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: rgba(255,255,255,.42);
}

.lp-scroll {
  margin-top: clamp(36px, 5vw, 56px);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: rgba(255,255,255,.34);
}
.lp-scroll::after {
  content: "↓";
  display: inline-block;
  margin-left: 8px;
  color: var(--accent);
  animation: lp-drop 1.7s ease-in-out infinite;
}
@keyframes lp-drop {
  0%, 100% { transform: translateY(0); opacity: .35; }
  50%      { transform: translateY(4px); opacity: 1; }
}

/* 版块骨架 */

.lp-sec {
  padding: clamp(56px, 8vw, 104px) var(--pad);
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.lp-sec.is-alt { background: var(--paper-2); }
.lp-sec.is-dark { background: var(--ink); color: #fff; border-bottom-color: var(--line-dark); }

.lp-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: clamp(28px, 4vw, 44px);
}
.lp-head .no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--accent);
  padding-top: 6px;
}
.lp-head h2 {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 600;
  letter-spacing: -.01em;
  border: 0;
  padding: 0;
  color: inherit;
}
.lp-head p {
  margin: 0 0 0 auto;
  max-width: 26em;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
  text-align: right;
}
.lp-sec.is-dark .lp-head p { color: rgba(255,255,255,.45); }

/* 项目卡 */

.lp-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.lp-card {
  display: block;
  padding: 26px 24px 24px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 2px;
  text-decoration: none;
  color: inherit;
  transition: border-color .22s, transform .22s, box-shadow .22s;
}
.lp-sec.is-alt .lp-card { background: #fff; }
.lp-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(11,11,12,.07);
}
.lp-card .kicker {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
}
.lp-card h3 {
  margin: 12px 0 10px;
  font-size: 17px;
  font-weight: 600;
  color: #111318;
}
.lp-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: #5A6069;
}
.lp-card .meta {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* 文章列表 */

.lp-list { border-top: 1px solid var(--line); }
.lp-item {
  display: grid;
  grid-template-columns: 62px 1fr auto;
  gap: 18px;
  align-items: baseline;
  padding: 22px 8px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  transition: background .2s, padding-left .2s;
}
.lp-item:hover { background: rgba(45,108,223,.04); padding-left: 16px; }
.lp-item .no {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: .1em;
}
.lp-item .ttl { font-size: 16px; font-weight: 500; color: #111318; }
.lp-item .ttl small {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0;
}
.lp-item .arrow {
  font-family: var(--mono);
  color: var(--muted);
  transition: transform .2s, color .2s;
}
.lp-item:hover .arrow { color: var(--accent); transform: translateX(4px); }

/* 关于 */

.lp-about {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}
.lp-about p { margin: 0 0 14px; font-size: 14.5px; line-height: 1.95; color: #3F444C; }
.lp-facts { border-top: 1px solid var(--line); }
.lp-facts div {
  display: flex; justify-content: space-between; gap: 16px;
  padding: 13px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.lp-facts span { color: var(--muted); }
.lp-facts b { font-weight: 500; color: #111318; font-family: var(--mono); font-size: 12.5px; }

/* 页脚 */

.lp-foot {
  padding: clamp(36px, 5vw, 56px) var(--pad);
  background: var(--ink);
  color: rgba(255,255,255,.4);
  font-size: 12.5px;
  display: flex; flex-wrap: wrap; gap: 10px 24px;
  align-items: center;
}
.lp-foot a { color: rgba(255,255,255,.7); text-decoration: none; }
.lp-foot a:hover { color: var(--accent); }
.lp-foot .sep { color: rgba(255,255,255,.16); }

/* 入场动效 */

.lp-reveal {
  transition: opacity .62s cubic-bezier(.22,.61,.36,1),
              transform .62s cubic-bezier(.22,.61,.36,1);
}
/* 只有 JS 就绪后才隐藏，避免脚本失效导致内容永久不可见 */
.lp-ready .lp-reveal { opacity: 0; transform: translateY(16px); }
.lp-ready .lp-reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .lp-reveal { opacity: 1; transform: none; transition: none; }
  .lp-scroll::after { animation: none; }
}

/* 移动端 */

@media screen and (max-width: 768px) {
  .lp-head { flex-wrap: wrap; }
  .lp-head p { margin: 10px 0 0; text-align: left; max-width: 100%; }
  .lp-item { grid-template-columns: 42px 1fr; }
  .lp-item .arrow { display: none; }
  .lp-about { grid-template-columns: 1fr; }
  body.lp-home .markdown-section { padding: 0; }
}