/* ==========================================================================
   www.salenwang.com — 极简学术风
   衬线为主 · 大量留白 · 黑白灰 + 一点暗胭脂
   ========================================================================== */

:root {
  --paper:      #fcfcfa;
  --ink:        #1b1a18;
  --ink-soft:   #4a4844;
  --ink-mute:   #8a867e;
  --rule:       #e4e1da;
  --rule-soft:  #efece6;
  --accent:     #8c2f2f;
  --accent-dim: #b46a6a;
  --tint:       #f5f3ee;

  --serif: "Charter", "Georgia", "Iowan Old Style", "Songti SC", "Source Han Serif SC",
           "Noto Serif CJK SC", "SimSun", serif;
  --sans:  -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC",
           "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono:  "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --w-text: 40rem;
  --w-wide: 54rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:      #15151a;
    --ink:        #e6e3dc;
    --ink-soft:   #b5b1a8;
    --ink-mute:   #85817a;
    --rule:       #2e2e35;
    --rule-soft:  #24242a;
    --accent:     #d98d8d;
    --accent-dim: #a96c6c;
    --tint:       #1c1c22;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  font-kerning: normal;
}

a { color: inherit; text-decoration: none; }

.skip-link {
  position: absolute; left: -9999px;
  background: var(--ink); color: var(--paper);
  padding: .5rem 1rem; z-index: 99;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* ---------------------------------------------------------------- 页头 */
.site-head {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 2rem;
  padding: 1.1rem clamp(1.25rem, 5vw, 3.5rem);
  background: var(--paper);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--rule-soft);
}

.site-mark {
  font-size: 1.0625rem; letter-spacing: .04em;
  white-space: nowrap;
}
.site-mark span {
  font-family: var(--sans);
  font-size: .75rem; letter-spacing: .08em;
  color: var(--ink-mute);
  margin-left: .1rem;
}

.site-nav {
  display: flex; gap: 1.6rem;
  font-family: var(--sans);
  font-size: .8125rem; letter-spacing: .06em;
}
.site-nav a { color: var(--ink-soft); padding-bottom: 2px; border-bottom: 1px solid transparent; }
.site-nav a:hover { color: var(--accent); border-color: var(--accent); }

/* 阅读进度条（文章页，由 site.js 注入） */
.progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0;
  background: var(--accent); z-index: 30;
  transition: width .08s linear;
}

/* ---------------------------------------------------------------- Hero */
.hero {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: clamp(4rem, 12vh, 8.5rem) clamp(1.25rem, 5vw, 3.5rem) clamp(3rem, 7vh, 4.5rem);
}

/* 照片 + 姓名并排 */
.hero-top {
  display: flex;
  align-items: center;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  margin-bottom: 2.4rem;
}

.hero-intro { min-width: 0; }

.portrait {
  flex: none;
  margin: 0;
  width: clamp(6.5rem, 15vw, 9.5rem);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  overflow: hidden;
  background: var(--tint);
  box-shadow: 0 0 0 1px var(--rule), 0 10px 28px -14px rgba(0, 0, 0, .45);
}

.portrait img {
  display: block;
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.04);
  transition: filter .5s ease, transform .5s ease;
}
.portrait:hover img { filter: grayscale(100%) contrast(1.1); transform: scale(1.03); }

@media (prefers-color-scheme: dark) {
  .portrait img { filter: grayscale(100%) contrast(1.02) brightness(.92); }
}

.hero-eyebrow {
  font-family: var(--sans);
  font-size: .78125rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 .9rem;
}

.hero-name {
  font-size: clamp(2.5rem, 7.5vw, 4.25rem);
  line-height: 1.04;
  letter-spacing: -.01em;
  font-weight: 400;
  margin: 0 0 .7rem;
}

.hero-tagline {
  font-size: clamp(1.125rem, 2.6vw, 1.5rem);
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 0;
  max-width: 30ch;
  font-style: italic;
}

.hero-bio {
  max-width: var(--w-text);
  color: var(--ink-soft);
  font-size: 1.0625rem;
}
.hero-bio p { margin: 0 0 1.15rem; }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr));
  gap: 1.75rem 2.5rem;
  margin: 3.25rem 0 0;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
}
.stats dt {
  font-family: var(--sans);
  font-size: .75rem; letter-spacing: .09em;
  color: var(--ink-mute);
  margin-bottom: .35rem;
}
.stats dd {
  margin: 0;
  font-size: 2.125rem; line-height: 1;
  font-variant-numeric: tabular-nums;
}
.stats .unit { font-size: .9375rem; color: var(--ink-mute); margin-left: .15rem; }

/* ---------------------------------------------------------------- 区块 */
.section {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: clamp(3.5rem, 9vh, 6rem) clamp(1.25rem, 5vw, 3.5rem);
  border-top: 1px solid var(--rule-soft);
}

.section-head { margin-bottom: 2.75rem; }
.section-head h2 {
  font-size: .8125rem; letter-spacing: .18em; text-transform: uppercase;
  font-family: var(--sans); font-weight: 600;
  color: var(--ink);
  margin: 0 0 .6rem;
}
.section-note {
  margin: 0; color: var(--ink-mute); font-size: .9375rem; font-style: italic;
}

/* ---------------------------------------------------------------- 代表作 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17.5rem, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.feature { background: var(--paper); transition: background .25s ease; }
.feature:hover { background: var(--tint); }

.feature-link {
  display: flex; flex-direction: column; height: 100%;
  padding: 1.75rem 1.6rem 1.5rem;
}

.feature-meta {
  display: flex; gap: .6rem; align-items: center;
  font-family: var(--sans); font-size: .71875rem; letter-spacing: .07em;
  color: var(--ink-mute);
  margin: 0 0 .9rem;
}
.feature-meta span + span::before { content: "·"; margin-right: .6rem; color: var(--rule); }

.feature-title {
  font-size: 1.3125rem; line-height: 1.4; font-weight: 400;
  margin: 0 0 .7rem;
  letter-spacing: -.005em;
}
.feature:hover .feature-title { color: var(--accent); }

.feature-blurb {
  margin: 0 0 1.35rem;
  color: var(--ink-soft);
  font-size: .9375rem; line-height: 1.72;
  flex: 1;
}

.feature-more {
  margin: 0;
  font-family: var(--sans); font-size: .78125rem; letter-spacing: .05em;
  color: var(--accent-dim);
}
.feature:hover .feature-more { color: var(--accent); }
.feature-more span { transition: transform .2s ease; display: inline-block; }
.feature:hover .feature-more span { transform: translateX(3px); }

/* ---------------------------------------------------------------- 筛选器 */
.filters {
  display: flex; flex-wrap: wrap; gap: .5rem;
  margin-bottom: 2.75rem;
}

.chip {
  font-family: var(--sans); font-size: .8125rem; letter-spacing: .02em;
  padding: .4rem .85rem;
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--rule);
  border-radius: 999px;
  cursor: pointer;
  transition: all .2s ease;
}
.chip:hover { border-color: var(--ink-mute); color: var(--ink); }
.chip.is-on {
  background: var(--ink); color: var(--paper); border-color: var(--ink);
}
.chip-n { opacity: .5; font-size: .71875rem; margin-left: .15rem; font-variant-numeric: tabular-nums; }

.empty-hint {
  color: var(--ink-mute); font-style: italic; margin: 0 0 2rem;
}

/* ---------------------------------------------------------------- 作品列表 */
.year-group { margin-bottom: 3rem; }
.year-group[hidden] { display: none; }

.year-label {
  font-family: var(--sans);
  font-size: .75rem; letter-spacing: .16em; font-weight: 600;
  color: var(--ink-mute);
  margin: 0 0 .5rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--rule);
  font-variant-numeric: tabular-nums;
}

.entries { list-style: none; margin: 0; padding: 0; }

.entry { border-bottom: 1px solid var(--rule-soft); }
.entry[hidden] { display: none; }

.entry-link {
  display: grid;
  grid-template-columns: 5.25rem 1fr;
  gap: 1.25rem;
  padding: 1.25rem .25rem;
  transition: background .2s ease, padding-left .2s ease;
}
.entry-link:hover { background: var(--tint); padding-left: .65rem; }

.entry-date {
  font-family: var(--sans); font-size: .78125rem; letter-spacing: .03em;
  color: var(--ink-mute);
  padding-top: .3rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.entry-body { display: block; min-width: 0; }

.entry-title {
  display: block;
  font-size: 1.1875rem; line-height: 1.5;
  margin-bottom: .45rem;
}
.entry-link:hover .entry-title { color: var(--accent); }

.entry-sub {
  display: flex; flex-wrap: wrap; gap: .4rem; align-items: center;
  margin-bottom: .45rem;
}

.pill {
  font-family: var(--sans); font-size: .6875rem; letter-spacing: .04em;
  color: var(--ink-mute);
  padding: .1rem .45rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  white-space: nowrap;
}
.pill-ch { color: var(--ink-soft); border-color: var(--rule); }
.pill-pen {
  color: var(--accent);
  border-color: var(--accent-dim);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  background: var(--tint);
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.entry-tags { display: flex; flex-wrap: wrap; gap: .5rem; }
.tag {
  font-family: var(--sans); font-size: .71875rem;
  color: var(--ink-mute);
}
.tag::before { content: "#"; opacity: .45; }

/* ---------------------------------------------------------------- 关于 */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 3rem;
}
.about-h {
  font-family: var(--sans);
  font-size: .75rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 1rem;
  font-weight: 600;
}
.about-col p { margin: 0 0 2rem; color: var(--ink-soft); font-size: .9375rem; }

.chan-list { margin: 0; }
.chan { padding: .7rem 0; border-bottom: 1px solid var(--rule-soft); }
.chan:last-child { border-bottom: none; }
.chan dt { font-size: .9375rem; }
.chan dd {
  margin: .15rem 0 0;
  font-family: var(--sans); font-size: .78125rem;
  color: var(--ink-mute);
}

.contact a {
  border-bottom: 1px solid var(--accent-dim);
  color: var(--accent);
  margin-right: 1.25rem;
  font-family: var(--sans); font-size: .875rem;
}
.contact a:hover { background: var(--tint); background: color-mix(in srgb, var(--accent) 8%, transparent); }

/* ---------------------------------------------------------------- 文章页 */
.article {
  max-width: var(--w-text);
  margin: 0 auto;
  padding: clamp(3rem, 9vh, 5.5rem) clamp(1.25rem, 5vw, 2rem) 2rem;
}

.article-head { margin-bottom: 3rem; }

.article-topic {
  font-family: var(--sans);
  font-size: .75rem; letter-spacing: .14em; text-transform: uppercase;
  margin: 0 0 1.1rem;
}
.article-topic a { color: var(--ink-mute); }
.article-topic a:hover { color: var(--accent); }

.article-title {
  font-size: clamp(1.875rem, 5.2vw, 2.75rem);
  line-height: 1.28;
  font-weight: 400;
  letter-spacing: -.012em;
  margin: 0 0 1.4rem;
  text-wrap: balance;
}

.article-meta {
  display: flex; flex-wrap: wrap; gap: .5rem; align-items: center;
  font-family: var(--sans); font-size: .8125rem;
  color: var(--ink-mute);
  margin: 0;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--rule);
}
.article-meta .sep { opacity: .4; }

.note {
  margin: 1.75rem 0 0;
  padding: 1rem 1.15rem;
  background: var(--tint);
  border-left: 2px solid var(--accent-dim);
}
.note-label {
  display: block;
  font-family: var(--sans); font-size: .6875rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: .35rem;
}
.note p { margin: 0; font-size: .875rem; line-height: 1.7; color: var(--ink-soft); }

/* 正文排版 */
.prose { font-size: 1.09375rem; line-height: 1.92; }
.prose p { margin: 0 0 1.5rem; }

.prose h2 {
  font-size: 1.4375rem; line-height: 1.4; font-weight: 400;
  margin: 3.25rem 0 1.25rem;
  padding-bottom: .55rem;
  border-bottom: 1px solid var(--rule);
  letter-spacing: -.005em;
}
.prose h3 {
  font-size: 1.1875rem; font-weight: 600;
  margin: 2.5rem 0 .9rem;
}
.prose h4 {
  font-family: var(--sans);
  font-size: .9375rem; font-weight: 600; letter-spacing: .02em;
  color: var(--ink-soft);
  margin: 2rem 0 .75rem;
}

.prose .kicker {
  font-family: var(--sans);
  font-size: .84375rem; line-height: 1.75;
  color: var(--ink-mute);
  margin: 0 0 2.5rem;
  padding-left: .9rem;
  border-left: 2px solid var(--rule);
}

.prose blockquote {
  margin: 2rem 0;
  padding: .25rem 0 .25rem 1.4rem;
  border-left: 2px solid var(--accent-dim);
  color: var(--ink-soft);
  font-style: italic;
}
.prose blockquote p { margin: 0 0 .75rem; }
.prose blockquote p:last-child { margin: 0; }

.prose ul, .prose ol { margin: 0 0 1.5rem; padding-left: 1.5rem; }
.prose li { margin-bottom: .5rem; }
.prose ul li::marker { color: var(--accent-dim); }
.prose ol li::marker { color: var(--ink-mute); font-family: var(--sans); font-size: .875rem; }

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

.prose a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent-dim);
  border-bottom-color: color-mix(in srgb, var(--accent) 35%, transparent);
}
.prose a:hover { border-bottom-color: var(--accent); }

.prose code {
  font-family: var(--mono); font-size: .875em;
  background: var(--tint);
  padding: .1rem .3rem; border-radius: 3px;
}
.prose pre {
  background: var(--tint);
  border: 1px solid var(--rule-soft);
  padding: 1rem 1.15rem;
  overflow-x: auto;
  margin: 0 0 1.5rem;
  font-size: .875rem; line-height: 1.6;
}
.prose pre code { background: none; padding: 0; }

.prose .rule {
  border: none; border-top: 1px solid var(--rule);
  margin: 2.75rem auto; width: 35%;
}

.table-wrap { overflow-x: auto; margin: 0 0 1.75rem; }
.prose table {
  width: 100%; border-collapse: collapse;
  font-family: var(--sans); font-size: .875rem; line-height: 1.6;
}
.prose th, .prose td {
  padding: .65rem .8rem;
  text-align: left;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
.prose th {
  font-weight: 600; font-size: .78125rem; letter-spacing: .04em;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}
.prose tbody tr:hover { background: var(--tint); }

/* 文章页脚 */
.article-foot {
  margin-top: 3.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--rule);
}
.article-tags { display: flex; flex-wrap: wrap; gap: .65rem; margin-bottom: 1.5rem; }

.origin {
  display: inline-block;
  font-family: var(--sans); font-size: .84375rem;
  color: var(--accent);
  border-bottom: 1px solid var(--accent-dim);
  margin-bottom: 1.75rem;
}
.origin:hover { background: var(--tint); background: color-mix(in srgb, var(--accent) 8%, transparent); }

.back { margin: 0; }
.back a {
  font-family: var(--sans); font-size: .84375rem;
  color: var(--ink-mute);
}
.back a:hover { color: var(--accent); }

/* 上下篇 */
.pager-wrap {
  max-width: var(--w-text);
  margin: 3rem auto 5rem;
  padding: 0 clamp(1.25rem, 5vw, 2rem);
  display: grid;
  gap: 0;
  border-top: 1px solid var(--rule);
}
@media (min-width: 42rem) {
  .pager-wrap { grid-template-columns: 1fr 1fr; column-gap: 2rem; }
}

.pager {
  display: block;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--rule-soft);
  transition: opacity .2s ease;
}
@media (min-width: 42rem) { .pager { border-bottom: none; } }
.pager:hover { opacity: .72; }
.pager-dir {
  display: block;
  font-family: var(--sans); font-size: .6875rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-mute);
  margin-bottom: .45rem;
}
.pager-title { display: block; font-size: .96875rem; line-height: 1.5; }
.pager:hover .pager-title { color: var(--accent); }
.pager-prev { text-align: right; }
@media (max-width: 42rem) { .pager-prev { text-align: left; } }

/* ---------------------------------------------------------------- 页脚 */
.site-foot {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: 2.75rem clamp(1.25rem, 5vw, 3.5rem) 4rem;
  border-top: 1px solid var(--rule-soft);
  font-family: var(--sans);
  font-size: .78125rem; line-height: 1.75;
  color: var(--ink-mute);
}
.site-foot p { margin: 0 0 .4rem; }
.foot-name {
  font-family: var(--serif); font-size: .9375rem;
  color: var(--ink-soft); margin-bottom: .6rem;
}
.foot-meta { opacity: .75; margin-top: .9rem; }

/* ---------------------------------------------------------------- 响应式 */
@media (max-width: 36rem) {
  body { font-size: 1.03125rem; }
  .hero-top { flex-direction: column; align-items: flex-start; gap: 1.35rem; }
  .portrait { width: 6.25rem; }
  .site-nav { gap: 1.05rem; font-size: .75rem; }
  .entry-link { grid-template-columns: 1fr; gap: .3rem; }
  .entry-date { padding-top: 0; }
  .stats { gap: 1.5rem; }
  .stats dd { font-size: 1.75rem; }
  .prose { font-size: 1.0625rem; line-height: 1.88; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}

@media print {
  .site-head, .site-nav, .pager-wrap, .filters, .progress { display: none; }
  body { background: #fff; color: #000; }
  .prose a { color: #000; border: none; }
}