/* =========================================================
   100w — 个人投资手记
   ========================================================= */

:root {
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC",
    "Microsoft YaHei", "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --pad: clamp(20px, 5vw, 66px);
  --wide: 1240px;

  /* 配色 · 默认深色 */
  color-scheme: dark;
  --bg: #0d0c0b;
  --bg-soft: #141210;
  --bg-sink: #171310;
  --ink: #f3eee6;
  --ink-2: #d6cfc4;
  --muted: #8d857a;
  --line: rgba(243, 238, 230, 0.12);
  --line-soft: rgba(243, 238, 230, 0.07);
  --accent: #d6b78f;
  --accent-dim: rgba(214, 183, 143, 0.42);
  --accent-faint: rgba(214, 183, 143, 0.55);
  --glow-1: rgba(214, 183, 143, 0.11);
  --glow-2: rgba(120, 132, 150, 0.06);
  --grain: 0.032;
  --code-bg: rgba(243, 238, 230, 0.07);
  --code-ink: #e9dfcd;
  --row-hover: rgba(243, 238, 230, 0.022);
  --select-bg: rgba(214, 183, 143, 0.26);
  --select-ink: #fff;
}

/* 配色 · 浅色 */
html[data-theme="light"] {
  color-scheme: light;
  --bg: #ffffff;
  --bg-soft: #f5f5f4;
  --bg-sink: #f6f6f5;
  --ink: #16181a;
  --ink-2: #3d4145;
  --muted: #70767b;
  --line: rgba(22, 24, 26, 0.13);
  --line-soft: rgba(22, 24, 26, 0.075);
  --accent: #8f5c30;
  --accent-dim: rgba(143, 92, 48, 0.38);
  --accent-faint: rgba(143, 92, 48, 0.5);
  --glow-1: rgba(203, 172, 130, 0.1);
  --glow-2: rgba(120, 140, 170, 0.05);
  --grain: 0.022;
  --code-bg: rgba(22, 24, 26, 0.05);
  --code-ink: #8a4b1e;
  --row-hover: rgba(22, 24, 26, 0.025);
  --select-bg: rgba(143, 92, 48, 0.16);
  --select-ink: #16181a;
}

html[data-theme="light"] .card {
  box-shadow: 0 1px 2px rgba(22, 24, 26, 0.05), 0 18px 40px -30px rgba(22, 24, 26, 0.4);
}

/* 切换瞬间给主要色块一点过渡 */
html.is-switching body,
html.is-switching .prose,
html.is-switching .prose h2::before,
html.is-switching .prose code,
html.is-switching .prose pre,
html.is-switching .prose thead th,
html.is-switching .prose tbody td,
html.is-switching .brand,
html.is-switching .masthead-side,
html.is-switching .foot,
html.is-switching .back,
html.is-switching .pnav,
html.is-switching .pnav-title,
html.is-switching .post-head {
  transition: background-color 0.45s ease, color 0.45s ease, border-color 0.45s ease;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  z-index: 0;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 顶部暖光 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(760px 420px at 50% -12%, var(--glow-1), transparent 68%),
    radial-gradient(900px 600px at 92% 8%, var(--glow-2), transparent 70%);
}

/* 细颗粒质感 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9000;
  pointer-events: none;
  opacity: var(--grain);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='220' height='220' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection {
  background: var(--select-bg);
  color: var(--select-ink);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 4px;
}

/* ------------------------------- 页头 ------------------------------- */

.masthead {
  max-width: var(--wide);
  margin: 0 auto;
  padding: clamp(22px, 3.4vw, 34px) var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: lowercase;
  color: var(--ink);
  padding-right: 0.18em;
  transition: color 0.3s ease;
}
.brand:hover { color: var(--accent); }
.brand--sm { font-size: 12px; letter-spacing: 0.14em; color: var(--muted); padding-right: 0.14em; }

.masthead-side {
  display: flex;
  align-items: center;
  gap: 18px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

/* 背景主题切换 */
.theme-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  line-height: 1;
}

.theme-switch button {
  margin: 0;
  padding: 3px 1px 4px;
  font: inherit;
  letter-spacing: inherit;
  color: var(--muted);
  background: none;
  border: 0;
  border-bottom: 1px solid transparent;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  transition: color 0.3s ease, border-color 0.3s ease;
}
.theme-switch button:hover { color: var(--ink-2); }
.theme-switch button[aria-pressed="true"] {
  color: var(--accent);
  border-bottom-color: var(--accent-dim);
}

.theme-sep { color: var(--muted); opacity: 0.35; }

.topbar-side {
  display: flex;
  align-items: center;
  gap: 18px;
}

/* ------------------------------- 卡片墙 ------------------------------- */

.grid {
  max-width: var(--wide);
  margin: 0 auto;
  padding: clamp(18px, 3.4vw, 42px) var(--pad) clamp(56px, 9vw, 120px);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(12px, 1.5vw, 20px);
}

.card {
  position: relative;
  display: block;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: 3px;
  background: var(--bg-soft);
  isolation: isolate;
  transition: border-color 0.5s ease, transform 0.7s cubic-bezier(0.16, 0.68, 0.24, 1);
  animation: rise 0.85s cubic-bezier(0.16, 0.68, 0.24, 1) both;
  animation-delay: calc(var(--i, 0) * 80ms);
}

@keyframes rise {
  from { opacity: 0; transform: translateY(18px) scale(0.995); }
  to { opacity: 1; transform: none; }
}

.card:hover { border-color: var(--accent-dim); }

.card-media {
  position: absolute;
  inset: 0;
  display: block;
  overflow: hidden;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1.015);
  filter: saturate(0.88) brightness(0.86) contrast(1.03);
  transition: transform 1.3s cubic-bezier(0.16, 0.68, 0.24, 1), filter 0.7s ease;
}

.card:hover .card-media img {
  transform: scale(1.07);
  filter: saturate(1.02) brightness(0.98) contrast(1.02);
}

.card-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(8, 7, 6, 0.42), rgba(8, 7, 6, 0.08) 14%, transparent 26%),
    linear-gradient(to top, rgba(8, 7, 6, 0.94) 2%, rgba(8, 7, 6, 0.62) 34%, rgba(8, 7, 6, 0.1) 66%, rgba(8, 7, 6, 0.18) 100%);
  transition: opacity 0.6s ease;
}
.card:hover .card-shade { opacity: 0.94; }

.card-body {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 22px 20px 20px;
}

.card-date {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--accent);
  opacity: 0.86;
}

.card-title {
  font-size: clamp(16px, 1.35vw, 19.5px);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.005em;
  color: #fff;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-shadow: 0 1px 18px rgba(0, 0, 0, 0.35);
}

.card-arrow {
  position: absolute;
  top: 12px;
  right: 14px;
  z-index: 2;
  font-size: 14px;
  color: var(--accent);
  opacity: 0;
  transform: translate(-4px, 4px);
  transition: opacity 0.4s ease, transform 0.5s cubic-bezier(0.16, 0.68, 0.24, 1);
}
.card:hover .card-arrow { opacity: 1; transform: none; }

/* 没有封面的卡片 */
.card--bare { background: linear-gradient(160deg, var(--bg-soft), var(--bg) 62%); }
.card--bare .card-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: clamp(30px, 4vw, 46px);
  letter-spacing: 0.02em;
  color: var(--accent);
  opacity: 0.24;
}
.card--bare .card-shade { background: linear-gradient(to top, rgba(8, 7, 6, 0.9), transparent 70%); }

/* ------------------------------- 页脚 ------------------------------- */

.foot {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 26px var(--pad) 42px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.09em;
  color: var(--muted);
}

.foot-sep { opacity: 0.4; }

.foot-link {
  margin-left: auto;
  color: var(--muted);
  transition: color 0.3s ease;
}
.foot-link:hover { color: var(--accent); }

/* =============================== 文章页 =============================== */

.topbar {
  max-width: 1080px;
  margin: 0 auto;
  padding: clamp(20px, 3vw, 30px) var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  transition: color 0.3s ease, gap 0.3s ease;
}
.back:hover { color: var(--accent); gap: 12px; }

.post {
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(24px, 4vw, 52px) var(--pad) 0;
}

.post-head {
  padding-bottom: clamp(20px, 2.6vw, 30px);
  margin-bottom: clamp(28px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
  animation: rise 0.7s cubic-bezier(0.16, 0.68, 0.24, 1) both;
}

.post-head h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(30px, 5.2vw, 50px);
  line-height: 1.24;
  letter-spacing: -0.02em;
}

/* ------------------------------- 正文 ------------------------------- */

.prose {
  color: var(--ink-2);
  font-size: clamp(16px, 1.05vw + 14px, 17.5px);
  line-height: 1.95;
  letter-spacing: 0.012em;
  overflow-wrap: break-word;
}

.prose > *:first-child { margin-top: 0; }

.prose p { margin: 0 0 1.5em; }

/* 导语：正文第一段 */
.prose .lead {
  margin: 0 0 1.7em;
  font-size: clamp(17px, 0.5vw + 15.6px, 19.5px);
  line-height: 1.9;
  letter-spacing: 0.008em;
  color: var(--ink);
}

.prose h2,
.prose h3,
.prose h4 {
  font-family: var(--serif);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.4;
}

.prose h2 {
  font-size: clamp(21px, 2.2vw, 26px);
  margin: 2.6em 0 1em;
}

.prose h2::before {
  content: "";
  display: block;
  width: 26px;
  height: 1px;
  margin-bottom: 16px;
  background: var(--accent);
  opacity: 0.65;
}

.prose h3 {
  font-size: clamp(17.5px, 1.6vw, 20px);
  margin: 2.2em 0 0.8em;
}

.prose h4 { font-size: 1.02em; margin: 1.8em 0 0.6em; }

.prose a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent-dim);
  transition: border-color 0.3s ease, color 0.3s ease;
}
.prose a:hover { border-color: var(--accent); }

.prose strong { color: var(--ink); font-weight: 600; }
.prose em { color: var(--ink-2); }

.prose img {
  display: block;
  width: 100%;
  height: auto;
  margin: 2em 0;
  border-radius: 3px;
  background: var(--bg-sink);
  cursor: zoom-in;
  transition: opacity 0.35s ease;
}
.prose img:hover { opacity: 0.9; }

.prose hr {
  border: 0;
  height: 1px;
  margin: clamp(30px, 4.4vw, 46px) auto;
  background: linear-gradient(90deg, transparent, var(--line) 26%, var(--line) 74%, transparent);
}

.prose blockquote {
  margin: 2em 0;
  padding: 2px 0 2px 20px;
  border-left: 1px solid var(--accent-dim);
  color: var(--muted);
  font-style: normal;
}

.prose ul,
.prose ol { margin: 1.3em 0; padding-left: 1.15em; }
.prose li { margin: 0.5em 0; }
.prose li::marker { color: var(--accent-dim); }

.prose code {
  font-family: var(--mono);
  font-size: 0.86em;
  padding: 0.15em 0.4em;
  border-radius: 2px;
  background: var(--code-bg);
  color: var(--code-ink);
}

.prose pre {
  margin: 2em 0;
  padding: 18px 20px;
  overflow-x: auto;
  border: 1px solid var(--line-soft);
  border-radius: 3px;
  background: var(--bg-sink);
}
.prose pre code { background: none; padding: 0; font-size: 13px; line-height: 1.7; }

/* 表格 */
.prose table {
  width: 100%;
  margin: 2em 0;
  border-collapse: collapse;
  font-size: 0.9em;
  font-variant-numeric: tabular-nums;
  line-height: 1.65;
}

.prose thead th {
  padding: 0 12px 10px;
  text-align: left;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.prose tbody td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-2);
}

.prose tbody tr:last-child td { border-bottom: 1px solid var(--line); }
.prose tbody tr:hover td { background: var(--row-hover); }

/* Q / A 小档案 */
.qa {
  display: grid;
  margin: 2.2em 0;
  padding: 6px 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.qa dt,
.qa dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.qa dt {
  padding: 12px 2px 4px;
  color: var(--muted);
  font-size: 0.86em;
}

.qa dd {
  padding: 0 2px 14px;
  color: var(--ink-2);
  font-size: 0.98em;
  line-height: 1.75;
}

.qa dt span,
.qa dd span {
  flex: none;
  width: 20px;
  padding: 1px 0;
  text-align: center;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.04em;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: 2px;
  transform: translateY(-1px);
}

/* 上一篇 / 下一篇 */
.pnavs {
  max-width: 760px;
  margin: clamp(56px, 8vw, 96px) auto 0;
  padding: 0 var(--pad);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(16px, 3vw, 40px);
}

.pnav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  transition: border-color 0.4s ease;
}
.pnav:hover { border-color: var(--accent-dim); }

.pnav--older { text-align: right; align-items: flex-end; }

.pnav-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.pnav-date {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--accent);
  opacity: 0.8;
}

.pnav-title {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-2);
  transition: color 0.3s ease;
}
.pnav:hover .pnav-title { color: var(--ink); }

.pnav.is-empty { opacity: 0.4; }
.pnav.is-empty .pnav-label { color: var(--muted); }

.is-post .foot { margin-top: clamp(48px, 7vw, 80px); }

/* ------------------------------- 404 ------------------------------- */

.lost {
  min-height: 72vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  text-align: center;
  padding: var(--pad);
}

.lost-no {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--accent);
}

.lost h1 {
  margin: 0 0 18px;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(26px, 5vw, 40px);
}

/* ------------------------------- 灯箱 ------------------------------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: grid;
  place-items: center;
  padding: clamp(16px, 4vw, 48px);
  background: rgba(6, 5, 4, 0.92);
  backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  cursor: zoom-out;
}
.lightbox.is-open { opacity: 1; pointer-events: auto; }
.lightbox img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 2px;
  transform: scale(0.98);
  transition: transform 0.4s cubic-bezier(0.16, 0.68, 0.24, 1);
}
.lightbox.is-open img { transform: none; }

/* ------------------------------- 响应式 ------------------------------- */

@media (max-width: 1000px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  .grid { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .card { aspect-ratio: 5 / 6; }
  .theme-switch { gap: 7px; }
  .topbar-side { gap: 14px; }
  .prose table { font-size: 13px; }
  .prose thead th { padding: 0 8px 8px; font-size: 9.5px; letter-spacing: 0.06em; }
  .prose tbody td { padding: 9px 8px; }
  .pnavs { grid-template-columns: 1fr; gap: 18px; }
  .pnav--older { text-align: left; align-items: flex-start; }
  .foot { font-size: 10px; }
  .foot-link { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}