/* Homepage air / brand masthead — 世说文丛 */

:root {
  --sn-ink: #1a2332;
  --sn-muted: #6b7380;
  --sn-line: rgba(26, 35, 50, 0.1);
  --sn-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
}

/* Full-width brand masthead */
.sn-masthead {
  position: relative;
  overflow: hidden;
  margin: 12px 0 28px;
  min-height: 240px;
  color: #f5f7fa;
  background:
    linear-gradient(115deg, rgba(18, 24, 36, 0.94) 0%, rgba(32, 42, 58, 0.8) 52%, rgba(18, 24, 36, 0.9) 100%),
    url('../img/bg.png?v=20260905b') center 35% / cover no-repeat;
}
.sn-masthead::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 16% 18%, rgba(255,255,255,0.09), transparent 42%),
    linear-gradient(to top, rgba(10,14,22,0.4), transparent 42%);
  pointer-events: none;
}
.sn-masthead-inner {
  position: relative;
  z-index: 1;
  padding: 64px 36px 56px;
  max-width: 860px;
}
.sn-masthead-brand {
  margin: 0 0 14px;
  font-family: var(--sn-serif);
  font-weight: 700;
  font-size: 46px;
  letter-spacing: 0.2em;
  line-height: 1.12;
  color: #fff;
}
.sn-masthead-tag {
  margin: 0 0 18px;
  font-size: 15px;
  letter-spacing: 0.3em;
  color: rgba(245, 247, 250, 0.78);
}
.sn-masthead-desc {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(245, 247, 250, 0.7);
}
.sn-masthead-rule {
  display: block;
  width: 52px;
  height: 2px;
  margin: 24px 0 0;
  background: rgba(255,255,255,0.55);
}

/* Airier list rhythm */
.lead-title {
  margin: 6px 0 24px !important;
  padding: 0 0 14px !important;
  border-bottom: 1px solid var(--sn-line);
  overflow: hidden;
}
.lead-title h3 {
  float: none !important;
  font-family: var(--sn-serif);
  font-size: 22px !important;
  font-weight: 700 !important;
  letter-spacing: 0.14em;
  color: var(--sn-ink);
}
.excerpt {
  margin: 0 0 20px !important;
  padding: 20px 150px 20px 22px !important;
  background: #fff !important;
  border: 1px solid var(--sn-line) !important;
  border-radius: 2px !important;
  box-shadow: none !important;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.excerpt:hover {
  border-color: rgba(26, 35, 50, 0.2) !important;
  box-shadow: 0 10px 28px rgba(26, 35, 50, 0.06) !important;
}
.excerpt .focus {
  margin-right: -138px !important;
  width: 128px !important;
}
.excerpt .thumb {
  width: 128px !important;
  height: 92px !important;
  border-radius: 2px;
  object-fit: cover;
}
.excerpt-post {
  padding: 4px 4px 4px 0 !important;
}
.excerpt header {
  margin-bottom: 10px !important;
  white-space: normal !important;
}
.excerpt h2 {
  display: block !important;
  font-family: var(--sn-serif);
  font-size: 20px !important;
  line-height: 1.45 !important;
  font-weight: 700 !important;
  margin: 4px 0 0 !important;
}
.excerpt h2 a {
  color: var(--sn-ink) !important;
}
.excerpt .note {
  font-size: 14px !important;
  line-height: 1.85 !important;
  color: var(--sn-muted) !important;
  margin-bottom: 10px !important;
}
.excerpt .meta {
  color: #9aa1ab !important;
  font-size: 12px !important;
}

.header {
  border-bottom: 1px solid var(--sn-line) !important;
  box-shadow: none !important;
}
.site-navbar li a {
  letter-spacing: 0.06em;
}

@media (max-width: 768px) {
  .sn-masthead {
    min-height: 180px;
    margin: 8px 0 18px;
  }
  .sn-masthead-inner {
    padding: 40px 20px 36px;
  }
  .sn-masthead-brand {
    font-size: 30px;
    letter-spacing: 0.12em;
  }
  .sn-masthead-tag {
    letter-spacing: 0.14em;
    font-size: 13px;
  }
  .excerpt {
    padding: 16px !important;
  }
  .excerpt .focus {
    float: none !important;
    display: block;
    width: 100% !important;
    margin: 0 0 12px !important;
  }
  .excerpt .thumb {
    width: 100% !important;
    height: 160px !important;
  }
  .lead-title h3 {
    font-size: 18px !important;
  }
}