/* ============ 基础变量：浅色液态玻璃 ============ */
:root {
  --bg: #f3f5fb;
  --bg-soft: #ffffff;
  --glass: rgba(255, 255, 255, 0.82);
  --glass-border: rgba(255, 255, 255, 0.9);
  --text: #1c2233;
  --text-dim: #6b7280;
  --accent: #d4841a;
  --accent-soft: rgba(212, 132, 26, 0.15);
  --danger: #e5607a;
  --radius: 20px;
  --radius-sm: 14px;
  --gap: 24px;
  --gap-lg: 56px;
  --max-w: 1080px;
  --shadow: 0 8px 32px rgba(31, 38, 80, 0.08);
}

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

html, body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body {
  background: var(--bg);
  color: var(--text);
  position: relative;
}

/* 液态光斑背景 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(600px 400px at 15% 10%, rgba(124,156,255,0.3), transparent 60%),
    radial-gradient(500px 500px at 85% 80%, rgba(255,170,200,0.25), transparent 60%),
    radial-gradient(500px 400px at 50% 50%, rgba(120,220,200,0.2), transparent 60%);
  z-index: 0;
  pointer-events: none;
  animation: drift 22s ease-in-out infinite alternate;
}
/* 确保内容在光斑之上 */
.nav, .container, .reader, .admin-wrap, footer {
  position: relative;
  z-index: 1;
}
@keyframes drift {
  0%   { transform: translate(0,0) scale(1); }
  100% { transform: translate(50px,-40px) scale(1.1); }
}

a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; display: block; }

/* ============ 栅格容器 ============ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-lg) var(--gap);
}

/* ============ 液态玻璃卡片 ============ */
.glass {
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s, background .35s;
}

.card-hover:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 20px 40px -12px rgba(212, 132, 26, 0.25);
}

/* ============ 顶部导航 ============ */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px var(--gap);
  max-width: var(--max-w);
  margin: 0 auto;
}
.nav .brand {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 1px;
}
.nav .links a {
  color: var(--text-dim);
  margin-left: 20px;
  font-size: 14px;
  transition: color .2s;
}
.nav .links a:hover { color: var(--text); }

/* ============ Hero ============ */
.hero {
  padding: var(--gap-lg) 0;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 16px;
}
.hero .meta {
  color: var(--text-dim);
  margin-bottom: 28px;
  font-size: 14px;
}
.hero .summary {
  color: var(--text-dim);
  max-width: 640px;
  font-size: 16px;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  border: none;
  cursor: pointer;
  transition: transform .25s, box-shadow .25s;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px -8px rgba(212,132,26,0.5);
}
.btn.ghost {
  background: transparent;
  border: 1px solid rgba(0,0,0,0.1);
  color: var(--text);
}

/* ============ 瀑布流 ============ */
.masonry {
  columns: 3;
  column-gap: var(--gap);
}
.masonry .item {
  break-inside: avoid;
  margin-bottom: var(--gap);
  padding: 28px;
  display: block;
  color: inherit;
}
.masonry .item h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: var(--text);
}
.masonry .item p {
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.7;
}
.masonry .item .num {
  display: inline-block;
  font-size: 12px;
  color: #b8741a;
  background: rgba(255, 180, 80, 0.18);
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.masonry .item.tall { padding: 40px 28px; }
.masonry .item.short { padding: 22px 28px; }

/* ============ 骨架屏 ============ */
.skeleton {
  background: linear-gradient(90deg, rgba(0,0,0,0.04) 25%, rgba(0,0,0,0.08) 50%, rgba(0,0,0,0.04) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.sk-line { height: 14px; margin-bottom: 10px; }
.sk-line.w60 { width: 60%; }
.sk-line.w80 { width: 80%; }
.sk-line.w40 { width: 40%; }
.sk-block { height: 160px; margin-bottom: 16px; }

/* ============ 空状态 ============ */
.empty {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-dim);
}
.empty .illustration {
  width: 120px;
  height: 120px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: var(--glass);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  backdrop-filter: blur(20px);
}
.empty p { margin-bottom: 20px; }

/* ============ 阅读页 ============ */
.reader {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--gap-lg) var(--gap);
}
.reader h1 {
  font-size: 28px;
  margin-bottom: 8px;
}
.reader .chapter-meta {
  color: var(--text-dim);
  font-size: 13px;
  margin-bottom: 48px;
}
.reader .content p {
  margin-bottom: 22px;
  text-indent: 2em;
  color: var(--text);
  font-size: 17px;
}
.reader-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 60px;
  padding-top: 30px;
  border-top: 1px solid rgba(0,0,0,0.08);
}

/* ============ 后台表单 ============ */
.admin-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--gap-lg) var(--gap);
}
.admin-wrap h1 {
  font-size: 24px;
  margin-bottom: var(--gap-lg);
}
.form-group { margin-bottom: 28px; }
.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.6);
  border: 1px solid rgba(0,0,0,0.08);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border .2s, background .2s;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  background: #fff;
}
.form-group textarea {
  min-height: 320px;
  resize: vertical;
  line-height: 1.8;
}

/* 后台列表 */
.admin-list .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  margin-bottom: 14px;
}
.admin-list .row .info h3 { font-size: 15px; margin-bottom: 4px; }
.admin-list .row .info span { font-size: 12px; color: var(--text-dim); }
.admin-list .row .actions a {
  font-size: 13px;
  margin-left: 12px;
  color: var(--text-dim);
}
.admin-list .row .actions a:hover { color: var(--text); }
.admin-list .row .actions a.danger { color: var(--danger); }

/* 设置卡片栅格 */
.settings-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

/* ============ 登录页 ============ */
.login-box {
  max-width: 400px;
  margin: 10vh auto;
  padding: 48px 40px;
}
.login-box h2 {
  text-align: center;
  margin-bottom: 28px;
  font-size: 22px;
}
.login-box .error {
  background: rgba(229, 96, 122, 0.1);
  color: var(--danger);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 16px;
}
.login-box .success {
  background: rgba(80, 200, 140, 0.12);
  color: #2f9e6e;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 16px;
}

/* ============ 响应式 ============ */
footer {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-dim);
  font-size: 13px;
}
@media (max-width: 900px) {
  .masonry { columns: 2; }
}
@media (max-width: 600px) {
  :root {
    --gap: 16px;
    --gap-lg: 32px;
  }
  .masonry { columns: 1; }
  .nav { padding: 16px; }
  .nav .links a { margin-left: 14px; font-size: 13px; }
  .reader .content p { font-size: 16px; }
  .login-box { padding: 32px 24px; margin: 6vh 16px; }
}