/* ============================================================
   theme.css · 《SKILL + CLI + 本体 + AUI 设计实践分享》共享样式
   复用 cc-科普视频深色专业风格 · 6 章 PPT 统一基座
   每章 HTML 用 <link rel="stylesheet" href="theme.css"> 引入
   ============================================================ */

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

:root {
  /* —— 色板（科普视频同款）—— */
  --bg:      #060b14;
  --bg-soft: #0c1422;
  --cyan:    #00d4ff;
  --purple:  #a855f7;
  --gold:    #f59e0b;
  --green:   #10b981;
  --red:     #ef4444;
  --text:    #e2e8f0;
  --dim:     #64748b;
  --line:    rgba(0, 212, 255, 0.15);
  --card:    rgba(255, 255, 255, 0.03);
  --card-bd: rgba(255, 255, 255, 0.08);

  /* —— 字号系统 · 中文可读性优先（用 clamp 适配视口）—— */
  --fs-xxs: clamp(11px, 1.0vw, 13px);
  --fs-xs:  clamp(12px, 1.1vw, 14px);
  --fs-sm:  clamp(13px, 1.2vw, 15px);
  --fs-md:  clamp(15px, 1.4vw, 17px);
  --fs-lg:  clamp(17px, 1.7vw, 20px);
  --fs-xl:  clamp(20px, 2.2vw, 26px);
  --fs-2xl: clamp(26px, 3.2vw, 40px);
  --fs-3xl: clamp(34px, 4.6vw, 60px);

  --mono: 'SF Mono', 'JetBrains Mono', 'Consolas', monospace;
  --sans: -apple-system, 'PingFang SC', 'Hiragino Sans GB',
          'Microsoft YaHei', '微软雅黑', 'Helvetica Neue', Arial, sans-serif;
}

html, body { width: 100%; height: 100%; overflow: hidden; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  user-select: none;
}

/* ===== SLIDE SYSTEM ===== */
#slideshow { position: fixed; inset: 0; }
.slide {
  position: absolute; inset: 0;
  height: 100vh; height: 100dvh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.6s ease, transform 0.6s ease;
  transform: translateY(20px);
  padding: clamp(40px, 6vh, 80px) clamp(32px, 6vw, 96px);
  overflow: hidden;
}
.slide.active   { opacity: 1; pointer-events: all; transform: translateY(0); }
.slide.exit     { opacity: 0; transform: translateY(-20px); }
.slide-content  { position: relative; z-index: 2; max-width: 1180px; width: 100%; }

/* ===== 章节角标 ===== */
.chapter-tag {
  position: fixed; top: clamp(14px, 2.5vh, 24px); left: clamp(20px, 3vw, 40px);
  z-index: 100; font-size: var(--fs-xs); color: var(--cyan);
  letter-spacing: 2px; text-transform: uppercase;
}

/* ===== 进度条 ===== */
#progress-bar {
  position: fixed; top: 0; left: 0; z-index: 100; height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--purple), var(--gold));
  width: 0%; transition: width 0.3s ease;
}

/* ===== 页码 ===== */
#slide-counter {
  position: fixed; top: clamp(14px, 2.5vh, 24px); right: clamp(20px, 3vw, 40px);
  z-index: 100; font-size: var(--fs-sm); color: var(--dim); letter-spacing: 2px;
}

/* ===== 导航点 ===== */
#nav-dots {
  position: fixed; right: clamp(12px, 1.6vw, 18px); top: 50%;
  transform: translateY(-50%); z-index: 100;
  display: flex; flex-direction: column; gap: 8px;
}
.nav-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--dim); cursor: pointer; border: none;
  transition: all 0.3s;
}
.nav-dot.active { background: var(--cyan); height: 20px; border-radius: 3px; }
.nav-dot:hover  { background: var(--text); }

/* ===== 标题排版 ===== */
.eyebrow {
  font-size: var(--fs-sm); color: var(--cyan); letter-spacing: 3px;
  text-transform: uppercase; margin-bottom: clamp(12px, 2vh, 20px);
}
.page-title {
  font-size: var(--fs-2xl); font-weight: 800; line-height: 1.25;
  margin-bottom: clamp(16px, 2.6vh, 28px);
}
.page-title .hl  { color: var(--cyan); }
.page-title .hl2 { color: var(--gold); }
.lead {
  font-size: var(--fs-lg); color: var(--text); line-height: 1.7;
  max-width: 900px;
}
.dim { color: var(--dim); }

/* ===== 卡片 ===== */
.card {
  background: var(--card); border: 1px solid var(--card-bd);
  border-radius: 14px; padding: clamp(16px, 2.4vh, 26px);
}
.card-grid {
  display: grid; gap: clamp(12px, 1.8vw, 20px);
  margin-top: clamp(16px, 2.6vh, 28px);
}
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.card h3 { font-size: var(--fs-lg); margin-bottom: 8px; }
.card p  { font-size: var(--fs-sm); color: var(--dim); line-height: 1.6; }
.card .num {
  font-size: var(--fs-xl); font-weight: 800; color: var(--cyan);
}

/* 强调色变体 */
.accent-cyan   { border-color: rgba(0,212,255,.35);  }
.accent-purple { border-color: rgba(168,85,247,.35); }
.accent-gold   { border-color: rgba(245,158,11,.35); }
.accent-green  { border-color: rgba(16,185,129,.35); }
.accent-red    { border-color: rgba(239,68,68,.35);  }

/* ===== 代码块 ===== */
.code {
  font-family: var(--mono); font-size: var(--fs-sm);
  background: #04080f; border: 1px solid var(--line);
  border-radius: 10px; padding: clamp(14px, 2vh, 22px);
  text-align: left; line-height: 1.7; color: #cbd5e1;
  overflow: auto;
}
.code .k  { color: var(--purple); }
.code .s  { color: var(--green); }
.code .c  { color: var(--dim); }
.code .n  { color: var(--gold); }

/* ===== 对比双栏 ===== */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(16px,2vw,28px); }
.compare .col { border-radius: 14px; padding: clamp(16px,2.4vh,26px); }
.compare .before { background: rgba(239,68,68,.06);  border: 1px solid rgba(239,68,68,.25); }
.compare .after  { background: rgba(16,185,129,.06); border: 1px solid rgba(16,185,129,.25); }
.compare h4 { font-size: var(--fs-lg); margin-bottom: 12px; }
.compare .before h4 { color: var(--red); }
.compare .after  h4 { color: var(--green); }
.compare li { font-size: var(--fs-sm); color: var(--text); line-height: 1.8; list-style: none; }

/* ===== 列表 ===== */
.bullets { text-align: left; margin-top: clamp(14px,2vh,24px); }
.bullets li {
  font-size: var(--fs-md); line-height: 1.9; list-style: none;
  padding-left: 24px; position: relative; margin-bottom: 6px;
}
.bullets li::before {
  content: '▸'; color: var(--cyan); position: absolute; left: 0;
}

/* ===== 标语带 ===== */
.takeaway {
  margin-top: clamp(18px,3vh,32px); padding: clamp(14px,2vh,20px) clamp(20px,3vw,32px);
  background: linear-gradient(90deg, rgba(0,212,255,.1), rgba(168,85,247,.06));
  border-left: 3px solid var(--cyan); border-radius: 8px;
  font-size: var(--fs-lg); text-align: left; line-height: 1.6;
}

/* ===== chip ===== */
.chip {
  display: inline-block; font-size: var(--fs-xxs);
  padding: 3px 10px; border-radius: 999px; margin: 2px;
  background: rgba(0,212,255,.1); color: var(--cyan);
  border: 1px solid rgba(0,212,255,.25);
}
.chip.gold  { background: rgba(245,158,11,.1); color: var(--gold); border-color: rgba(245,158,11,.25); }
.chip.live  { background: rgba(239,68,68,.12); color: var(--red);  border-color: rgba(239,68,68,.3); }

/* ===== 背景氛围 ===== */
.bg-glow {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 50% 40% at 20% 15%, rgba(0,212,255,.08), transparent),
    radial-gradient(ellipse 45% 35% at 85% 80%, rgba(168,85,247,.07), transparent);
}

/* ===== 响应式高度断点 ===== */
@media (max-height: 700px) { .slide { padding: 40px 48px; } }
@media (max-height: 600px) { :root { --fs-2xl: clamp(22px,2.8vw,32px); } }

@media (prefers-reduced-motion: reduce) {
  .slide { transition: opacity 0.2s ease; transform: none; }
}

/* 表格 */
table.cmp { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
table.cmp th, table.cmp td {
  border: 1px solid var(--card-bd); padding: 8px 12px; text-align: left;
}
table.cmp th { background: rgba(0,212,255,.08); color: var(--cyan); }
table.cmp td.good { color: var(--green); }
table.cmp td.bad  { color: var(--red); }