/* Magazine Grid × Editorial —— 结构/交互取 magazine-grid，气质取 editorial，标题为重宋 */

:root {
  --paper: #f9f8f6;
  --card: #ffffff;
  --ink: #1a1a1a;
  --ink-70: #3f3f46;
  --ink-60: #52525b;
  --ink-50: #71717a;
  --line: #e4e4e7;
  --line-soft: rgba(26, 26, 26, 0.08);
  --accent: #e63946;
  --accent-soft: #fef2f2;
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", ui-sans-serif, system-ui, sans-serif;
}

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

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

body {
  margin: 0;
  padding-top: 64px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (min-width: 768px) { body { padding-top: 80px; } }

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--serif);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin: 0;
}

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

img { display: block; max-width: 100%; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 768px) { .container { padding: 0 48px; } }

/* 导航：固定顶部、玻璃底、内层细分隔线（对齐 editorial 导航骨架） */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(249, 248, 246, 0.9);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 64px;
  border-bottom: 1px solid rgba(28, 28, 28, 0.1);
}

@media (min-width: 768px) { .nav-inner { height: 80px; } }

.nav-logo {
  font-family: var(--serif);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  overflow-x: auto;
}

@media (min-width: 768px) { .nav-links { gap: 32px; } }

.nav-link {
  position: relative;
  padding: 6px 0;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(28, 28, 28, 0.6);
  white-space: nowrap;
  transition: color 0.3s;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: bottom right;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); transform-origin: bottom left; }

.nav-link.is-active { color: var(--ink); }
.nav-link.is-active::after { transform: scaleX(1); }

/* 刊头 */
.masthead {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.masthead-row {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (min-width: 900px) {
  .masthead-row {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
}

.masthead-title {
  font-size: clamp(2.25rem, 6vw, 4.5rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.masthead-title em {
  font-style: normal;
  color: var(--accent);
}

.masthead-note {
  max-width: 22rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: 15px;
  line-height: 1.85;
  letter-spacing: 0;
  color: rgba(28, 28, 28, 0.6);
}

.masthead-rule {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-50);
}

.masthead-rule span { flex: 1; height: 1px; background: var(--line); }

/* 网格 */
.magazine-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .magazine-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .magazine-grid { grid-template-columns: repeat(4, 1fr); }
}

.featured { grid-column: span 1; }

@media (min-width: 768px) {
  .featured { grid-column: span 2; }
}

.wide { grid-column: span 1; }

@media (min-width: 768px) {
  .wide { grid-column: span 2; }
}

/* 卡片：editorial 官方卡片结构（顶边线 + 4:5 图 + 标题下划线揭示） */
.card {
  display: block;
  padding-top: 24px;
  border-top: 1px solid rgba(28, 28, 28, 0.1);
  transition: border-color 0.5s;
  cursor: pointer;
}

.card:hover { border-top-color: rgba(28, 28, 28, 0.4); }

.card-media {
  display: block;
  overflow: hidden;
  margin-bottom: 24px;
  background: rgba(28, 28, 28, 0.05);
  aspect-ratio: 4 / 5;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1s ease-out;
}

.card:hover .card-media img { transform: scale(1.05); }

.featured .card-media { aspect-ratio: 16 / 10; }

.wide .card-media { aspect-ratio: 16 / 10; }

.card-kicker {
  margin: 0 0 12px;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(28, 28, 28, 0.4);
  transition: color 0.3s;
}

.card:hover .card-kicker { color: rgba(28, 28, 28, 0.7); }

.card-title {
  font-size: 1.875rem;
  line-height: 1.375;
  letter-spacing: -0.04em;
  margin: 0 0 16px;
}

.featured .card-title { font-size: clamp(1.75rem, 3.2vw, 2.5rem); }

.card-title span { position: relative; }

.card-title span::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.card:hover .card-title span::after { width: 100%; }

.card-excerpt {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(28, 28, 28, 0.6);
}

/* 打字机光标：所有摘要末尾统一闪烁，文字整段直接显示（不做逐字显现） */
@keyframes caret-blink {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

.card-excerpt::after {
  content: "";
  display: inline-block;
  width: 1px;
  height: 1em;
  margin-left: 3px;
  vertical-align: -0.12em;
  background: currentColor;
  animation: caret-blink 0.75s step-end infinite;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(28, 28, 28, 0.4);
}

.card-meta span + span::before {
  content: "·";
  margin-right: 10px;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 档案：沿用卡片骨架，顶边线 + 无底色，避免白色砖块 */
.archive {
  grid-column: span 1;
  padding-top: 24px;
  border-top: 1px solid rgba(28, 28, 28, 0.1);
  display: flex;
  flex-direction: column;
}

@media (min-width: 768px) {
  .archive { grid-column: span 2; }
}

/* 四栏时档案占满一行，避免右侧留空 */
@media (min-width: 1024px) {
  .archive { grid-column: span 4; }
}

/* 锚点跳转时留出固定导航的高度 */
.archive { scroll-margin-top: 88px; }

.archive-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(28, 28, 28, 0.1);
}

.archive-title { font-size: 15px; }

.archive-count {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(28, 28, 28, 0.4);
}

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

.archive-list li + li { border-top: 1px solid rgba(28, 28, 28, 0.1); }

.archive-link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  transition: color 0.2s;
}

.archive-link:hover { color: var(--accent); }

.archive-name { font-size: 14px; line-height: 1.5; }

.archive-date {
  flex: none;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-50);
  font-variant-numeric: tabular-nums;
}

/* 入场 */
@keyframes magazine-fade-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: magazine-fade-in 0.55s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.d1 { animation-delay: 0.04s; }
.d2 { animation-delay: 0.1s; }
.d3 { animation-delay: 0.16s; }
.d4 { animation-delay: 0.22s; }

/* ---------------- 文章页 ---------------- */

.post-head {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 0 32px;
}

.post-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
  margin: 16px 0 18px;
}

.post-excerpt {
  margin: 0 0 22px;
  max-width: 40rem;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-60);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-50);
}

.post-meta span + span::before {
  content: "·";
  margin-right: 10px;
}

.post-cover {
  max-width: 1080px;
  margin: 0 auto 48px;
  padding: 0 16px;
}

@media (min-width: 768px) { .post-cover { padding: 0 24px; } }

.post-cover div {
  overflow: hidden;
  aspect-ratio: 21 / 9;
  background: rgba(28, 28, 28, 0.05);
}

.post-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.post-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink-70);
}

@media (min-width: 768px) { .post-body { padding: 0; } }

.post-body > p { margin: 0 0 1.6em; }

.post-body h2 {
  margin: 2.2em 0 0.7em;
  font-size: clamp(1.375rem, 2.2vw, 1.75rem);
  line-height: 1.3;
  color: var(--ink);
}

.post-body ul,
.post-body ol {
  margin: 0 0 1.6em;
  padding-left: 1.2em;
}

.post-body li { margin-bottom: 0.5em; }

.post-body a {
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  transition: color 0.2s, border-color 0.2s;
}

.post-body a:hover { color: var(--accent); border-color: var(--accent); }

.post-body code {
  font-family: var(--sans);
  font-size: 0.9em;
  background: var(--line-soft);
  padding: 2px 5px;
  border-radius: 4px;
}

.post-body blockquote {
  margin: 2em 0;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--accent);
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.7;
  color: var(--ink);
}

.post-body blockquote p { margin: 0; }

.post-body hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 3em 0;
}

.post-foot {
  max-width: 720px;
  margin: 64px auto 0;
  padding: 24px 16px 0;
  border-top: 1px solid var(--line);
}

@media (min-width: 768px) { .post-foot { padding: 24px 0 0; } }

/* 返回：editorial 对比按钮（实底 → hover 反转描边） */
.back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 32px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--ink);
  border: 1px solid var(--ink);
  transition: background-color 0.2s, color 0.2s;
}

.back:hover { background: var(--paper); color: var(--ink); }

/* 页脚 */
.foot {
  margin-top: 72px;
  border-top: 1px solid var(--line);
  padding: 24px 0 48px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-50);
}

.foot p { margin: 0; }

@media (prefers-reduced-motion: reduce) {
  .fade-in { animation: none; }
  .card-media img { transition: none; }
  .card-excerpt::after { animation: none; }
}