:root {
  --bg: #f3f6f1;
  --bg-deep: #e7eee4;
  --ink: #1c2a22;
  --ink-soft: #4a5a50;
  --accent: #2f6b4f;
  --accent-deep: #1f4a36;
  --wood: #8b6b45;
  --line: rgba(28, 42, 34, 0.12);
  --paper: rgba(255, 255, 255, 0.72);
  --shadow: 0 18px 50px rgba(31, 74, 54, 0.08);
  --radius: 18px;
  --font-display: "ZCOOL XiaoWei", "Noto Serif SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(47, 107, 79, 0.14), transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 0%, rgba(139, 107, 69, 0.12), transparent 50%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  line-height: 1.7;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(28, 42, 34, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 42, 34, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 70%);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-deep);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(243, 246, 241, 0.82);
  border-bottom: 1px solid var(--line);
}

.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.04em;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 35%, #f7e7c8 0 28%, transparent 29%),
    radial-gradient(circle at 62% 42%, #c4a574 0 42%, transparent 43%),
    linear-gradient(145deg, #8b6b45, #5e4630);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.25);
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-deep);
}

.hero {
  max-width: 1080px;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 3rem;
  display: grid;
  gap: 1.25rem;
  animation: rise 0.8s ease both;
}

.hero-kicker {
  margin: 0;
  color: var(--wood);
  font-size: 0.9rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 4.6rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.hero-desc {
  margin: 0;
  max-width: 34rem;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.35rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-deep);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink-soft);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
}

.hero-visual {
  margin-top: 1.5rem;
  height: clamp(180px, 28vw, 280px);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  background:
    linear-gradient(120deg, rgba(47, 107, 79, 0.9), rgba(31, 74, 54, 0.75)),
    radial-gradient(circle at 70% 40%, rgba(247, 231, 200, 0.35), transparent 40%);
  box-shadow: var(--shadow);
  animation: fade-in 1.1s ease 0.15s both;
}

.hero-visual::after {
  content: "一只小松鼠 · 记录生活与技术";
  position: absolute;
  left: 1.5rem;
  bottom: 1.25rem;
  color: rgba(255, 255, 255, 0.92);
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.08em;
}

.leaf {
  position: absolute;
  width: 70px;
  height: 40px;
  background: rgba(243, 246, 241, 0.18);
  border-radius: 50% 0 50% 0;
  animation: drift 8s ease-in-out infinite;
}

.leaf:nth-child(1) { top: 18%; left: 12%; animation-delay: 0s; }
.leaf:nth-child(2) { top: 42%; left: 58%; width: 90px; animation-delay: 1.2s; }
.leaf:nth-child(3) { top: 28%; right: 12%; width: 55px; animation-delay: 2.4s; }

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  animation: rise 0.7s ease 0.2s both;
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 400;
  letter-spacing: 0.05em;
}

.section-head p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.post-list {
  display: grid;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.post-item {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem 1.5rem;
  box-shadow: var(--shadow);
  transition: transform 0.25s ease, border-color 0.25s ease;
  animation: rise 0.7s ease both;
}

.post-item:nth-child(1) { animation-delay: 0.25s; }
.post-item:nth-child(2) { animation-delay: 0.35s; }
.post-item:nth-child(3) { animation-delay: 0.45s; }
.post-item:nth-child(4) { animation-delay: 0.55s; }

.post-item:hover {
  transform: translateY(-3px);
  border-color: rgba(47, 107, 79, 0.28);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  color: var(--ink-soft);
  font-size: 0.85rem;
  margin-bottom: 0.45rem;
}

.post-item h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: 0.04em;
}

.post-item h3 a {
  color: var(--ink);
}

.post-item h3 a:hover {
  color: var(--accent);
}

.post-item p {
  margin: 0;
  color: var(--ink-soft);
}

.page-hero {
  max-width: 760px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 1.5rem;
  animation: rise 0.7s ease both;
}

.page-hero h1 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 400;
  letter-spacing: 0.05em;
}

.page-hero p {
  margin: 0;
  color: var(--ink-soft);
}

.article,
.about-panel {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  animation: rise 0.75s ease 0.1s both;
}

.article-body,
.about-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow);
}

.article-body h2 {
  margin: 2rem 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 400;
}

.article-body p,
.about-panel p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

.article-body ul {
  color: var(--ink-soft);
  padding-left: 1.2rem;
}

.about-panel h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 400;
}

.about-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.about-item strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--ink);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.45);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0.35rem 0;
}

.site-footer .icp a {
  color: var(--ink-soft);
}

.site-footer .icp a:hover {
  color: var(--accent);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes drift {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-12px) rotate(8deg); }
}

@media (max-width: 640px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding-top: 3rem;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-body,
  .about-panel {
    padding: 1.5rem 1.2rem;
  }
}