/* Tailwind 已改为本地静态文件（static/vendor/tailwind.min.css），
   在 base.html 中以 <link> 引入，避免 CDN @import 串行阻塞渲染。 */

/* ── 设计令牌：温暖治愈 + 玻璃拟态 ── */
:root {
  --primary: #FF7A59;
  --primary-2: #FF9E7D;
  --primary-3: #F2603C;
  --bg-1: #FFF7F2;
  --bg-2: #FFFFFF;
  --text-1: #2C3038;
  --text-2: #6B7280;
  --ok: #10B981;
  --err: #EF4444;
  --warn: #F59E0B;
  --glass: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(255, 255, 255, 0.8);
  --shadow: 0 10px 30px rgba(242, 96, 60, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Noto Sans", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--text-1);
  background:
    radial-gradient(1200px 600px at 10% -10%, #FFE9DF 0%, transparent 60%),
    radial-gradient(1000px 500px at 100% 0%, #FFF0E6 0%, transparent 55%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-2) 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

/* 玻璃卡片 */
.glass {
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  border-radius: 20px;
}

/* 渐变文字/按钮 */
.gradient-text {
  background: linear-gradient(90deg, var(--primary-3), var(--primary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.btn-primary {
  background: linear-gradient(90deg, var(--primary), var(--primary-3));
  color: #fff;
  border: none;
  border-radius: 999px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(242, 96, 60, 0.28);
}
/* 按压反馈 */
.btn-primary:active { transform: translateY(0) scale(.97); box-shadow: 0 6px 14px rgba(242,96,60,.22); }

/* 卡片悬停微动效 */
.card-hover { transition: transform .2s ease, box-shadow .2s ease; }
.card-hover:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(242,96,60,.16); }
/* 卡片封面图悬停轻放大（配合卡片上的 overflow-hidden） */
.card-img { transition: transform .35s ease; }
.card-hover:hover .card-img { transform: scale(1.04); }

/* 导航链接下划线滑入 */
.nav-link { position: relative; transition: color .2s ease; }
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -3px;
  width: 100%; height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-3));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.nav-link:hover::after { transform: scaleX(1); }

/* 入场淡入 */
@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.fade-up { animation: fadeUp .5s ease both; }

/* 首页卡片流：逐个错开入场（纯 CSS，不依赖 JS） */
.stagger > *:nth-child(1) { animation-delay: .05s; }
.stagger > *:nth-child(2) { animation-delay: .12s; }
.stagger > *:nth-child(3) { animation-delay: .19s; }
.stagger > *:nth-child(4) { animation-delay: .26s; }
.stagger > *:nth-child(5) { animation-delay: .33s; }
.stagger > *:nth-child(n+6) { animation-delay: .4s; }

/* 滚动显现（site.js 驱动；无 JS 时元素保持默认可见） */
.reveal-init { opacity: 0; transform: translateY(14px); }
.reveal-shown {
  opacity: 1;
  transform: none;
  transition: opacity .55s ease, transform .55s ease;
}

/* 时间轴圆点呼吸 */
@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 122, 89, .35); }
  50% { box-shadow: 0 0 0 5px rgba(255, 122, 89, 0); }
}
.timeline-dot { animation: dotPulse 2.4s ease-in-out infinite; }

/* flash 消息：入场下滑 + 自动淡出（site.js 5 秒后加 .flash-hide） */
@keyframes flashIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }
.flash { animation: flashIn .35s ease both; transition: opacity .5s ease, transform .5s ease; }
.flash-hide { opacity: 0; transform: translateY(-8px); }

/* 时间轴 */
.timeline-line { background: linear-gradient(180deg, var(--primary), var(--primary-2)); }

/* Markdown 正文排版 */
.prose img { border-radius: 12px; max-width: 100%; }
.prose a { color: var(--primary-3); text-decoration: underline; }
.prose pre { background: #2C3038; color: #fff; padding: 12px; border-radius: 12px; overflow:auto; }
.prose code { background: #FFE9DF; padding: 2px 6px; border-radius: 6px; }

/* ── 质感升级：动态光斑背景 ── */
.bg-blob {
  position: fixed;
  border-radius: 50%;
  filter: blur(70px);
  opacity: .55;
  pointer-events: none;
  z-index: -1; /* 沉到内容之下、画布背景之上，配合玻璃拟态透出柔光 */
  will-change: transform;
}
.b1 { width: 420px; height: 420px; background: #FFD3BE; top: -120px; left: -100px; animation: blobFloat 26s ease-in-out infinite; }
.b2 { width: 380px; height: 380px; background: #FFE7C7; bottom: -110px; right: -80px; animation: blobFloat 32s ease-in-out infinite reverse; }
.b3 { width: 300px; height: 300px; background: #FFC7B8; top: 42%; left: 58%; animation: blobFloat 38s ease-in-out infinite; }
@keyframes blobFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(46px, -34px) scale(1.08); }
  66% { transform: translate(-34px, 28px) scale(.94); }
}

/* ── 质感升级：渐变文字缓缓流动 ── */
.gradient-text {
  background-size: 220% 100%;
  animation: gradientFlow 7s ease-in-out infinite;
}
@keyframes gradientFlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ── 质感升级：顶部滚动进度条 ── */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--primary), var(--primary-3));
  border-radius: 0 3px 3px 0;
  z-index: 60;
  transition: width .12s linear;
}

/* ── 质感升级：滚动后导航玻璃加深阴影 ── */
nav .glass { transition: box-shadow .3s ease, background .3s ease; }
body.scrolled nav .glass {
  box-shadow: 0 14px 34px rgba(242, 96, 60, .18);
  background: rgba(255, 255, 255, .78);
}

/* ── 质感升级：卡片 3D 倾斜基座 + 跟随鼠标的光泽 ── */
.card-hover { position: relative; transform-style: preserve-3d; will-change: transform; }
.card-hover::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(320px circle at var(--mx, 50%) var(--my, 50%),
              rgba(255, 255, 255, .45), transparent 60%);
  opacity: 0;
  transition: opacity .3s ease;
  pointer-events: none;
}
.card-hover:hover::after { opacity: 1; }

/* ── 质感升级：主按钮流光扫过（只作用于按钮，不影响时间轴圆点）── */
button.btn-primary { position: relative; overflow: hidden; }
button.btn-primary::before {
  content: "";
  position: absolute;
  top: 0; left: -80%;
  width: 45%; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, .5), transparent);
  transform: skewX(-20deg);
  transition: left .55s ease;
  pointer-events: none;
}
button.btn-primary:hover::before { left: 135%; }

/* ── 质感升级：时间轴线条渐变缓缓流动 ── */
.timeline-line {
  background: linear-gradient(180deg, var(--primary), var(--primary-2), var(--primary));
  background-size: 100% 240%;
  animation: lineFlow 4.5s linear infinite;
}
@keyframes lineFlow {
  from { background-position: 0% 0%; }
  to { background-position: 0% 240%; }
}

/* ── 质感升级：首页 hero 内晕光 ── */
.hero {
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: radial-gradient(closest-side, rgba(255, 154, 118, .18), transparent 70%);
  animation: heroGlow 9s ease-in-out infinite;
  pointer-events: none;
}
@keyframes heroGlow {
  0%, 100% { transform: translate(-8%, -6%) scale(1); }
  50% { transform: translate(10%, 8%) scale(1.15); }
}

/* 系统开启“减少动态效果”时，一键关闭所有动画（可访问性） */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  /* 光斑本身也静止并弱化，避免大面积色块干扰 */
  .bg-blob { opacity: .3; }
}