/* ============================================
   南旭的博客 — 简约清新 · 文艺杂志风
   ============================================ */

/* 霞鹜文楷（标题/引文用，加载失败自动回退到系统宋体） */
@import url("https://cdn.jsdelivr.net/npm/lxgw-wenkai-screen-webfont@1.7.0/style.css");

:root {
  --bg: #fafaf6;               /* 暖纸色 */
  --card: #ffffff;
  --text: #2a2d26;
  --text-secondary: #6b7064;
  --text-faint: #a6aa9e;
  --accent: #4a8f6d;           /* 鼠尾草绿 */
  --accent-deep: #3a7358;
  --accent-soft: #edf4ef;
  --accent-border: #d9e7dd;
  --border: #e9eae2;
  --shadow-hover: 0 14px 34px rgba(46, 58, 50, 0.09);
  --radius: 16px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-title: "LXGW WenKai Screen", "Songti SC", "STSong",
    "Noto Serif SC", "SimSun", serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ---------- 阅读进度条（文章页） ---------- */

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--accent), #86bd9e);
  z-index: 100;
}

/* ---------- 顶部导航 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 250, 246, 0.82);
  backdrop-filter: blur(12px) saturate(1.5);
  -webkit-backdrop-filter: blur(12px) saturate(1.5);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text);
}

.logo svg {
  color: var(--accent);
  transition: transform 0.4s ease;
}

.logo:hover svg {
  transform: rotate(-12deg) scale(1.1);
}

.site-nav a {
  position: relative;
  font-size: 15px;
  color: var(--text-secondary);
  padding: 4px 2px;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -3px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transition: right 0.25s ease;
}

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

.site-nav a:hover::after,
.site-nav a.active::after {
  right: 0;
}

/* ---------- 首页 Hero ---------- */

.hero {
  padding: 88px 0 52px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--accent-deep);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 26px;
}

.hero h1 {
  font-family: var(--font-title);
  font-size: 46px;
  font-weight: 700;
  letter-spacing: 6px;
  margin-bottom: 20px;
}

.hero-sub {
  color: var(--text-secondary);
  font-size: 16px;
}

.hero-sub mark {
  background: linear-gradient(transparent 62%, rgba(74, 143, 109, 0.22) 62%);
  color: var(--accent-deep);
  padding: 0 2px;
}

/* ---------- 装饰分隔 ---------- */

.ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: #c3c8bb;
  font-size: 13px;
  margin: 0 0 48px;
}

.ornament::before,
.ornament::after {
  content: "";
  width: 64px;
  height: 1px;
  background: var(--border);
}

/* ---------- 文章卡片列表 ---------- */

.post-list {
  display: grid;
  gap: 22px;
  padding-bottom: 72px;
}

.post-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 30px 24px;
  transition: transform 0.25s ease, box-shadow 0.25s ease,
    border-color 0.25s ease;
}

.post-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-hover);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-faint);
  margin-bottom: 12px;
}

.post-meta .sep {
  opacity: 0.5;
}

.badge-new {
  font-size: 11.5px;
  line-height: 1;
  color: var(--accent-deep);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  padding: 4px 9px;
  border-radius: 999px;
}

.post-card h2 {
  font-family: var(--font-title);
  font-size: 23px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 1px;
  margin-bottom: 10px;
  transition: color 0.2s ease;
}

/* 整张卡片可点击 */
.post-card h2 a {
  color: var(--text);
}

.post-card h2 a::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
}

.post-card:hover h2 {
  color: var(--accent-deep);
}

.post-card .excerpt {
  color: var(--text-secondary);
  font-size: 15px;
}

.post-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
}

.tags {
  display: flex;
  gap: 8px;
}

.tag {
  font-size: 12.5px;
  color: var(--text-secondary);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 3px 11px;
  border-radius: 999px;
}

.read-more {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-faint);
  transition: color 0.2s ease;
}

.read-more .arrow {
  display: inline-block;
  transition: transform 0.25s ease;
}

.post-card:hover .read-more {
  color: var(--accent-deep);
}

.post-card:hover .read-more .arrow {
  transform: translateX(4px);
}

/* ---------- 滚动渐入 ---------- */

.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.js .reveal.visible {
  opacity: 1;
  transform: none;
}

/* ---------- 文章详情页 ---------- */

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 34px 0 30px;
  font-size: 14px;
  color: var(--text-secondary);
  background: var(--card);
  border: 1px solid var(--border);
  padding: 6px 16px;
  border-radius: 999px;
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.back-link:hover {
  color: var(--accent-deep);
  border-color: var(--accent-border);
  transform: translateX(-3px);
}

.post-header {
  text-align: center;
  margin-bottom: 30px;
}

.post-kicker {
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--accent);
  margin-bottom: 16px;
}

.post-header h1 {
  font-family: var(--font-title);
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 2px;
  line-height: 1.5;
}

.post-meta-center {
  margin-top: 16px;
  font-size: 13.5px;
  letter-spacing: 1px;
  color: var(--text-faint);
}

/* 正文排版 */

.prose {
  padding-bottom: 20px;
}

.prose p {
  margin: 1.35em 0;
}

/* 首字下沉 */
.prose > p:first-of-type::first-letter {
  font-family: var(--font-title);
  font-size: 3em;
  font-weight: 700;
  float: left;
  line-height: 0.95;
  padding: 5px 12px 0 0;
  color: var(--accent);
}

.prose h2 {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 1px;
  margin: 2.4em 0 1em;
}

.prose h2::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  transform: rotate(45deg);
}

/* 居中引文 */
.prose blockquote {
  margin: 2.2em 0;
  padding: 0 1.5em;
  text-align: center;
  font-family: var(--font-title);
  font-size: 18px;
  letter-spacing: 1px;
  color: #4c5347;
}

.prose blockquote::before {
  content: "“";
  display: block;
  font-size: 46px;
  line-height: 0.8;
  color: var(--accent);
  opacity: 0.35;
  margin-bottom: 10px;
}

.prose blockquote p {
  margin: 0.3em 0;
}

.prose ul,
.prose ol {
  margin: 1.35em 0;
  padding-left: 1.6em;
}

.prose li {
  margin: 0.45em 0;
}

.prose li::marker {
  color: var(--accent);
}

.prose strong {
  color: var(--accent-deep);
}

.prose hr {
  border: none;
  text-align: center;
  margin: 2.8em 0;
}

.prose hr::after {
  content: "✦";
  color: #c3c8bb;
  font-size: 14px;
  letter-spacing: 6px;
}

.prose code {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--accent-soft);
  padding: 2px 7px;
  border-radius: 6px;
}

/* 文末记号 */

.post-end {
  text-align: center;
  color: #c3c8bb;
  font-size: 14px;
  letter-spacing: 10px;
  margin: 8px 0 36px;
}

/* 上一篇 / 下一篇 */

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 64px;
}

.post-nav a {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 20px;
  transition: transform 0.25s ease, box-shadow 0.25s ease,
    border-color 0.25s ease;
}

.post-nav a:hover {
  transform: translateY(-2px);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-hover);
}

.post-nav .label {
  display: block;
  font-size: 12.5px;
  color: var(--text-faint);
  margin-bottom: 5px;
}

.post-nav .nav-title {
  display: block;
  font-family: var(--font-title);
  font-size: 15.5px;
  letter-spacing: 0.5px;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.post-nav a:hover .nav-title {
  color: var(--accent-deep);
}

.post-nav .older {
  text-align: right;
}

/* ---------- 页脚 ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 34px 0 46px;
  text-align: center;
}

.footer-ornament {
  color: var(--accent);
  opacity: 0.55;
  font-size: 15px;
  margin-bottom: 12px;
}

.site-footer p {
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--text-faint);
}

/* ---------- 移动端适配 ---------- */

@media (max-width: 600px) {
  body {
    font-size: 16px;
  }

  .hero {
    padding: 60px 0 40px;
  }

  .hero h1 {
    font-size: 32px;
    letter-spacing: 4px;
  }

  .post-card {
    padding: 22px 20px 18px;
  }

  .post-card h2 {
    font-size: 20px;
  }

  .post-header h1 {
    font-size: 26px;
  }

  .post-nav {
    grid-template-columns: 1fr;
  }

  .post-nav .older {
    text-align: left;
  }
}