/* 郑耀东个人网站 · 样式
   设计：极简 · 留白 · 物质感 */

:root {
  --bg: #faf8f4;
  --bg-soft: #f3efe8;
  --ink: #1f1d1a;
  --ink-soft: #6b6560;
  --line: #e6e0d6;
  --accent: #8a4b2d;
  --serif: "Georgia", "Songti SC", "STSong", "Noto Serif SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
}

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

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

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

/* 顶部导航 */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 248, 244, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.06em;
  font-weight: 600;
}
.brand small {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
  font-weight: 400;
}
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font-size: 14px;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
  transition: color .2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--accent); }

/* 主体 */
main { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* 首页 hero */
.hero { padding: 88px 0 56px; text-align: center; }
.hero .en {
  font-size: 12px;
  letter-spacing: 0.4em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.3;
  margin-bottom: 16px;
}
.hero .subtitle {
  font-size: 15px;
  color: var(--ink-soft);
  letter-spacing: 0.2em;
}

/* 通用段落 */
.section { padding: 48px 0; }
.section-title {
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 32px;
}
.lead {
  font-family: var(--serif);
  font-size: 19px;
  line-height: 2.1;
  color: var(--ink);
  max-width: 720px;
  margin: 0 auto;
}
.lead p { margin-bottom: 20px; }

/* 分隔 */
.rule { border: none; border-top: 1px solid var(--line); margin: 24px 0; }

/* 简历 */
.cv { max-width: 720px; margin: 0 auto; }
.cv h3 {
  font-family: var(--serif);
  font-size: 16px;
  margin: 28px 0 12px;
  letter-spacing: 0.04em;
}
.cv ul { list-style: none; }
.cv li {
  font-size: 14px;
  color: var(--ink);
  padding: 4px 0;
  display: flex;
  gap: 12px;
}
.cv li .yr {
  flex: 0 0 88px;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}
.cv li .tx { flex: 1; }

/* 作品网格 */
.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px 32px;
}
.work-card { break-inside: avoid; display: block; }
.work-card .frame {
  background: var(--bg-soft);
  padding: 18px;
  margin-bottom: 14px;
  transition: transform .3s;
}
.work-card .frame img {
  width: 100%;
  height: 340px;
  object-fit: contain;
}
.work-card:hover .frame { transform: translateY(-4px); }
.work-card h3 {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
  margin-bottom: 4px;
}
.work-card .meta {
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}
.work-card .desc {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.7;
}
.work-card .status {
  display: inline-block;
  margin-top: 10px;
  font-size: 11px;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 2px 10px;
  letter-spacing: 0.1em;
}

/* 理论页 */
.theory-block { max-width: 760px; }
.theory-block h2 {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 500;
  margin-bottom: 20px;
  line-height: 1.5;
}
.theory-block h3 {
  font-family: var(--serif);
  font-size: 18px;
  margin: 32px 0 10px;
}
.theory-block p, .theory-block li {
  font-size: 15px;
  color: var(--ink);
}
.theory-block ul { padding-left: 1.2em; margin: 12px 0; }
.theory-block li { margin-bottom: 8px; }
.concept {
  border-left: 2px solid var(--accent);
  padding: 4px 0 4px 20px;
  margin: 20px 0;
}
.concept b { font-family: var(--serif); font-size: 16px; }
.concept p { color: var(--ink-soft); font-size: 14px; margin-top: 4px; }
.paper {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.paper .st { color: var(--ink-soft); flex-shrink: 0; }

/* 联系页 */
.contact-card {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  padding: 24px 0;
}
.contact-card .item {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.contact-card .item:last-child { border-bottom: none; }
.contact-card .label {
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--ink-soft);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.contact-card .value {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.02em;
  word-break: break-all;
}

/* 页脚 + 备案 */
footer {
  margin-top: 72px;
  border-top: 1px solid var(--line);
  padding: 40px 24px 48px;
  text-align: center;
}
footer .beian {
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}
footer .beian a { color: var(--ink-soft); }
footer .beian a:hover { color: var(--accent); }
footer .sign {
  margin-top: 14px;
  font-family: var(--serif);
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: 0.06em;
}

/* 响应式 */
@media (max-width: 860px) {
  .work-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 20px; }
  .work-card .frame img { height: 260px; }
  .hero h1 { font-size: 32px; }
  .nav { height: 56px; }
  .nav-links { gap: 18px; }
  .nav-links a { font-size: 13px; }
}
@media (max-width: 560px) {
  .work-grid { grid-template-columns: 1fr; }
  .work-card .frame img { height: 300px; }
  .hero { padding: 60px 0 40px; }
  .hero h1 { font-size: 27px; }
  .lead { font-size: 17px; }
  .cv li .yr { flex-basis: 72px; }
  .paper { flex-direction: column; gap: 2px; }
}

/* ============================================================
   作品 hover 触发式文字框
   鼠标移到画上 → 画面沉入夜色，解说文字如银粉般浮现
   ============================================================ */
.work-card .frame {
  position: relative;
  overflow: hidden;
}
.frame-hover {
  position: absolute;
  inset: 0;
  background: rgba(28, 25, 22, 0.90);
  color: #f6f1e7;
  display: flex;
  padding: 30px;
  opacity: 0;
  transition: opacity .35s ease;
  pointer-events: none;
}
.frame-hover p {
  font-family: var(--serif);
  font-size: 14.5px;
  line-height: 2.05;
  letter-spacing: 0.02em;
  text-align: left;
  max-width: 44ch;
  max-height: 100%;
  overflow: auto;
  margin: auto;
  transform: translateY(12px);
  transition: transform .45s cubic-bezier(.22,.61,.36,1);
}
.frame-hover p::-webkit-scrollbar { width: 0; height: 0; }

.work-card:hover .frame-hover,
.work-card:focus .frame-hover,
.work-card:focus-within .frame-hover { opacity: 1; }
.work-card:hover .frame-hover p,
.work-card:focus .frame-hover p,
.work-card:focus-within .frame-hover p { transform: translateY(0); }

/* 桌面鼠标设备：隐藏平铺解说，改用 hover 遮罩 */
@media (hover: hover) and (pointer: fine) {
  .work-card .desc { display: none; }
}

/* 触屏设备（手机/平板）：隐藏 hover 遮罩，恢复平铺解说 */
@media (hover: none) and (pointer: coarse) {
  .frame-hover { display: none; }
}

/* ============================================================
   作品详情页
   ============================================================ */
.back {
  display: inline-block;
  margin: 40px 0 8px;
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
  transition: color .2s;
}
.back:hover { color: var(--accent); }

.detail-top {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: start;
  margin: 24px 0 48px;
}
.detail-figure {
  background: var(--bg-soft);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.detail-figure img {
  max-height: 72vh;
  max-width: 100%;
  object-fit: contain;
}
.detail-info { padding-top: 12px; }
.detail-title {
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 12px;
}
.detail-meta {
  font-size: 14px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  margin-bottom: 18px;
}

.detail-body {
  max-width: 720px;
  margin: 0 auto;
  font-family: var(--serif);
  font-size: 17px;
  line-height: 2.2;
  color: var(--ink);
}
.detail-body p { margin-bottom: 22px; }
.detail-body blockquote {
  margin: 28px 0;
  padding: 6px 0 6px 22px;
  border-left: 2px solid var(--accent);
  color: var(--ink-soft);
}
.detail-body blockquote p { margin: 0; font-size: 15px; line-height: 2; }

.detail-sign {
  max-width: 720px;
  margin: 40px auto 0;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-family: var(--serif);
  font-size: 14px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  line-height: 2;
  text-align: center;
}

.detail-nav {
  max-width: 720px;
  margin: 36px auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.detail-nav a {
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: 0.06em;
  transition: color .2s;
}
.detail-nav a:hover { color: var(--accent); }
.detail-nav .detail-contact {
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 8px 18px;
  letter-spacing: 0.1em;
}

@media (max-width: 860px) {
  .detail-top { grid-template-columns: 1fr; gap: 28px; }
  .detail-figure img { max-height: 60vh; }
  .detail-title { font-size: 26px; }
  .detail-nav { flex-wrap: wrap; justify-content: center; }
}