/* =========================
   Base / Layout
   ========================= */
:root { --w: 1000px; }

* { box-sizing: border-box; }

body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Helvetica Neue", Arial;
  margin: 0; color: #111; background: #fafafa;
}

a { color: inherit; text-decoration: none; }

.site-header {
  max-width: var(--w); margin: 24px auto; padding: 0 16px;
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.site-header h1 { margin: 0; font-size: 28px; }
.tagline { margin: 0 8px; color: #666; }
nav a { margin-right: 12px; color: #2563eb; }

main { max-width: var(--w); margin: 0 auto; padding: 0 16px 48px; min-height: 70vh; }
h2 { margin: 24px 0 12px; }

footer { text-align: center; color: #777; padding: 18px 0 34px; }

/* =========================
   Cards (Default / Light)
   ========================= */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px,1fr)); gap: 16px; }

.card {
  background: #fff; border: 1px solid #eee; border-radius: 16px;
  overflow: hidden; display: flex; flex-direction: column;
  box-shadow: 0 2px 8px rgba(0,0,0,.04); transition: transform .12s ease, box-shadow .12s ease;
  position: relative;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 12px 28px rgba(0,0,0,0.4); }

.card img { background: transparent; }
.card-body { padding: 12px 14px 14px; }

.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p  { margin: 0 0 8px; min-height: 38px; }

.tags span{
  font-size: 12px; padding: 2px 8px; border: 1px solid #e5e7eb; border-radius: 999px; margin-right: 6px;
}

/* =========================
   Theme: OCEAN
   ========================= */
:root{
  --sea-deep:#041a2f;     /* 深海 */
  --sea-mid:#08345a;      /* 中层海水 */
  --sea-surface:#2a6fb6;  /* 海面附近 */
}

body.theme-ocean{
  background:
    linear-gradient(to top, var(--sea-deep) 0%, var(--sea-mid) 45%, var(--sea-surface) 78%, #8fc2ff 100%);
  color:#eaf4ff;
  position: relative; overflow-x: hidden;
}

/* 海面高光 + 斜向阳光束 */
body.theme-ocean::before,
body.theme-ocean::after{
  content:""; position: fixed; inset:0; pointer-events:none;
}
body.theme-ocean::before{
  background:
    /* 顶部高光 + 体积光 */
    radial-gradient(120% 60% at 50% -10%, rgba(255,255,255,.55) 0%, rgba(255,255,255,.22) 25%, rgba(255,255,255,.06) 55%, transparent 70%),
    linear-gradient(to bottom, rgba(255,255,255,.18), transparent 35%),
    /* 轻微整体亮斑 */
    radial-gradient(120% 80% at 50% -30%, rgba(255,255,255,0.25), transparent 70%);
  mix-blend-mode: screen;
}
body.theme-ocean::after{
  background: repeating-linear-gradient(65deg, rgba(255,255,255,.14) 0 2px, rgba(255,255,255,0) 2px 120px);
  opacity: .20; filter: blur(1.5px);
  transform: translateY(-4%);
  animation: oceanRays 16s linear infinite;
  mask: linear-gradient(to bottom, rgba(0,0,0,0) 0%, rgba(0,0,0,.25) 10%, rgba(0,0,0,1) 40%);
}
@keyframes oceanRays{ from{ transform: translateY(-4%);} to{ transform: translateY(4%);} }

/* 微粒/气泡层 */
.ocean-particles, .ocean-particles::after{
  position: fixed; inset:-20% -20% -10% -20%; pointer-events:none; content:"";
  background-image:
    radial-gradient(2px 2px at 20% 12%, rgba(255,255,255,.32) 98%, transparent),
    radial-gradient(2px 2px at 78% 28%, rgba(255,255,255,.22) 98%, transparent),
    radial-gradient(1.5px 1.5px at 42% 68%, rgba(255,255,255,.20) 98%, transparent),
    radial-gradient(1.5px 1.5px at 60% 52%, rgba(255,255,255,.16) 98%, transparent),
    radial-gradient(2px 2px at 12% 86%, rgba(255,255,255,.18) 98%, transparent);
  animation: oceanDrift 24s linear infinite; mix-blend-mode: screen; opacity: .33;
}
.ocean-particles::after{ animation-duration: 36s; opacity:.22; filter: blur(.3px); }
@keyframes oceanDrift{ from{ transform: translateY(0);} to{ transform: translateY(10%);} }

/* 顶部/标题/导航在海洋里变亮 */
body.theme-ocean .site-header h1,
body.theme-ocean .tagline,
body.theme-ocean nav a,
body.theme-ocean h2,
body.theme-ocean footer{ color:#eaf4ff; }

/* 标题光晕描边 */
body.theme-ocean .site-header h1{
  text-shadow: 0 1px 0 rgba(255,255,255,.25), 0 0 18px rgba(120,200,255,.35);
}

/* 导航的水波下划线 */
body.theme-ocean nav a{ position:relative; }
body.theme-ocean nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:-2px; height:2px;
  background: linear-gradient(90deg, rgba(255,255,255,.7), rgba(255,255,255,0));
  transform: scaleX(0); transform-origin:left; transition: transform .25s ease;
}
body.theme-ocean nav a:hover::after{ transform: scaleX(1); }

/* ========== Ocean: Glass Cards 覆盖 ========== */
body.theme-ocean .card{
  /* 强制覆盖默认白底 */
  background: rgba(255,255,255,0.04) !important;
  backdrop-filter: blur(10px) saturate(100%);
  -webkit-backdrop-filter: blur(10px) saturate(100%);
  border: 1px solid rgba(255,255,255,0.25);
  box-shadow: 0 8px 20px rgba(0,0,0,0.10);
}
body.theme-ocean .card:hover{
  transform: translateY(-6px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.18);
}
/* 卡片内文本与标签颜色 */
body.theme-ocean .card h3{ color:#fff; }
body.theme-ocean .card p { color: rgba(255,255,255,0.88); }
body.theme-ocean .tags span{
  background: rgba(255,255,255,0.18); color:#eef6ff; border-color: rgba(255,255,255,0.35);
}

/* 焦散 Canvas 放在最顶叠加 */
#caustics{ position: fixed; inset: 0; pointer-events: none; mix-blend-mode: screen; }


/* =========================
   Theme: CYBERPIXEL (neon + pixel vibe)
   ========================= */
:root{
  --cp-bg0:#02030a;           /* 深黑底 */
  --cp-bg1:#0a0f1f;           /* 次层深蓝 */
  --cp-neon-cyan:#00eaff;     /* 霓虹蓝 */
  --cp-neon-pink:#ff2bd6;     /* 霓虹粉 */
  --cp-neon-yellow:#ffe66d;   /* 霓虹黄 */
  --cp-grid:#00d5ff;          /* 地板网格线 */
}

body.theme-cyberpixel{
  color:#d9e7ff;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(0,234,255,.10) 0%, transparent 60%),
    radial-gradient(120% 80% at 50% 120%, rgba(255,43,214,.10) 0%, transparent 60%),
    linear-gradient(#000, #000),
    radial-gradient(circle at 50% 30%, #0c1224 0%, var(--cp-bg0) 60%);
  background-blend-mode: screen, screen, normal, normal;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  image-rendering: pixelated; /* 像素味 */
  font-synthesis-weight: none;
}

/* 顶部/标题/导航配色 */
body.theme-cyberpixel .site-header h1,
body.theme-cyberpixel .tagline,
body.theme-cyberpixel nav a,
body.theme-cyberpixel h2,
body.theme-cyberpixel footer{ color:#e8f6ff; }

body.theme-cyberpixel .site-header h1{
  /* 轻微霓虹泛光 */
  text-shadow:
    0 0 6px rgba(0,234,255,.55),
    0 0 14px rgba(255,43,214,.35);
  font-family: "VT323", ui-monospace, Menlo, Consolas, monospace; /* 可选像素字体 */
  letter-spacing: .5px;
}

/* 导航下划线 → 霓虹条 */
body.theme-cyberpixel nav a{ position:relative; }
body.theme-cyberpixel nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:-2px; height:2px;
  background: linear-gradient(90deg, var(--cp-neon-cyan), var(--cp-neon-pink));
  transform: scaleX(0); transform-origin:left; transition: transform .25s ease;
  box-shadow: 0 0 12px rgba(0,234,255,.5);
}
body.theme-cyberpixel nav a:hover::after{ transform: scaleX(1); }

/* 赛博地板网格 */
body.theme-cyberpixel::before{
  content:""; position:fixed; left:-10vw; right:-10vw; bottom:-5vh; height:60vh;
  background:
    linear-gradient(var(--cp-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--cp-grid) 1px, transparent 1px);
  background-size: 44px 44px, 44px 44px;
  opacity:.25;
  transform: perspective(700px) rotateX(65deg) translateY(0);
  transform-origin: center bottom;
  filter: drop-shadow(0 0 6px rgba(0,234,255,.6));
  animation: cpGrid 14s linear infinite;
  pointer-events: none;
}
@keyframes cpGrid{
  from{ background-position: 0 0, 0 0; }
  to  { background-position: 0 44px, 44px 0; }
}

/* CRT 扫描线 + 暗角 */
body.theme-cyberpixel::after{
  content:""; position:fixed; inset:0; pointer-events:none;
  background:
    repeating-linear-gradient(to bottom, rgba(255,255,255,.04) 0 1px, rgba(0,0,0,0) 1px 3px),
    radial-gradient(120% 80% at 50% 120%, rgba(0,0,0,.65), transparent 60%);
  mix-blend-mode: overlay; opacity:.4;
}

/* 深色玻璃 + 霓虹描边 */
body.theme-cyberpixel .card{
  background: rgba(12,14,26,.55) !important;
  border: 1px solid rgba(0,234,255,.25);
  backdrop-filter: blur(6px) saturate(120%);
  -webkit-backdrop-filter: blur(6px) saturate(120%);
  box-shadow:
    0 0 0 1px rgba(0,234,255,.12) inset,
    0 10px 22px rgba(0,0,0,.35),
    0 0 18px rgba(0,234,255,.18);
  transition: transform .14s ease, box-shadow .14s ease, border-color .14s ease;
}
body.theme-cyberpixel .card:hover{
  transform: translateY(-6px);
  border-color: rgba(255,43,214,.45);
  box-shadow:
    0 0 0 1px rgba(255,43,214,.22) inset,
    0 14px 30px rgba(0,0,0,.5),
    0 0 28px rgba(255,43,214,.35);
}
body.theme-cyberpixel .card h3{ color:#fff; font-weight:600; }
body.theme-cyberpixel .card p { color: rgba(230,243,255,.9); }

/* 像素风小胶囊 */
body.theme-cyberpixel .tags span{
  color:#dff7ff;
  border:1px solid rgba(0,234,255,.45);
  background: linear-gradient(180deg, rgba(0,234,255,.12), rgba(255,43,214,.10));
  box-shadow: 0 0 10px rgba(0,234,255,.25) inset;
  text-transform: uppercase; letter-spacing:.3px; font-size: 11px;
}

/* 图片小屏边框更紧凑 */
body.theme-cyberpixel .card img{
  background: #05070f;
  border-bottom: 1px solid rgba(0,234,255,.18);
}

/* ===== About: 左图右文 ===== */
:root { --avatar: 220px; } 
#about .about-container{
  display: grid;                 /*容易被其他规则影响布局 */
  grid-template-columns: var(--avatar) 1fr;
  align-items: center;
  column-gap: 48px;
  row-gap: 12px;                 /* 以防小屏换行后有间距 */
  margin-top: 12px;
}

#about .about-avatar{
  width: var(--avatar);
  height: var(--avatar);
  border-radius: 50%;
  object-fit: cover;
  border: none; 
  box-shadow: 0 0 12px rgba(0,234,255,.25);
  margin-top: 8px;
}

#about .about-text{
  line-height: 1.7;
  max-width: 680px;
}

#about .about-text a{ color:#8ab4ff; text-decoration:none; }
#about .about-text a:hover{ text-decoration:underline; }

/* 手机端自动上下排 */
@media (max-width: 640px){
  #about .about-container{
    grid-template-columns: 1fr;  /* 一列，上下排列 */
    text-align: center;
  }
  #about .about-avatar{ margin: 0 auto; }
}