/* ================================================================
   OOO EGG · 站点样式
   基于 sanwan.ai 视觉风格：白底 + 红色品牌 + 大标题 + 卡片化
   主题蛋养成，融入 🥚 + 暖色调
   ================================================================ */

/* ---------- 基础变量 ---------- */
:root {
  --color-primary: #E60012;       /* 主红 */
  --color-primary-dark: #B3000E;
  --color-accent: #FFA500;        /* 蛋黄橙 */
  --color-cream: #FFF8F0;         /* 蛋清背景 */
  --color-pink: #FFE5E5;          /* 浅粉标签 */
  --color-blue: #2563EB;
  --color-text: #111111;
  --color-muted: #6B7280;
  --color-border: #E5E7EB;
  --color-bg: #FFFFFF;
  --color-bg-soft: #FAFAFA;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 8px 24px rgba(0,0,0,.06);
  --shadow-lg: 0 20px 48px rgba(0,0,0,.08);

  --container: 1180px;
  --container-narrow: 760px;

  --font-stack: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* ---------- 重置 ---------- */
*,*::before,*::after { box-sizing: border-box; }
html,body { margin: 0; padding: 0; }
body {
  font-family: var(--font-stack);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

h1,h2,h3,h4 { margin: 0; font-weight: 700; line-height: 1.25; letter-spacing: -0.01em; }
p { margin: 0; }

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container.narrow { max-width: var(--container-narrow); }
.center { text-align: center; }

/* ---------- 顶部导航 ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--color-border);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 18px;
  flex-shrink: 0;
}
.brand-emoji { font-size: 22px; }
.brand-name {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.primary-nav {
  display: flex;
  gap: 26px;
  margin-left: auto;
  font-size: 15px;
}
.primary-nav a {
  color: #333;
  position: relative;
  padding: 6px 0;
  transition: color .15s;
}
.primary-nav a:hover { color: var(--color-primary); }
.primary-nav a.active { color: var(--color-primary); font-weight: 600; }
.primary-nav a.nav-cta {
  background: var(--color-primary);
  color: #fff;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.primary-nav a.nav-cta:hover { background: var(--color-primary-dark); color: #fff; }

.lang-switch {
  display: flex;
  gap: 2px;
  background: var(--color-bg-soft);
  padding: 3px;
  border-radius: var(--radius-sm);
  font-size: 12px;
}
.lang-switch button {
  padding: 4px 10px;
  border-radius: 6px;
  color: var(--color-muted);
  transition: all .15s;
}
.lang-switch button.active {
  background: #fff;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

/* ---------- 模块 1：Hero ---------- */
.hero { padding: 56px 0 24px; }
.hero-banner { max-width: var(--container); margin: 0 auto 40px; padding: 0 24px; }
.banner-tag {
  display: inline-block;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  color: #fff;
  padding: 6px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
  margin: 0 auto 18px;
  display: block;
  width: fit-content;
}
.banner-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.banner-card {
  border-radius: var(--radius-md);
  padding: 22px 24px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.banner-card--red { background: linear-gradient(135deg, #FF1A2C, #C40010); }
.banner-card--blue { background: linear-gradient(135deg, #2563EB, #1E40AF); }
.banner-card h3 { font-size: 17px; margin-bottom: 6px; }
.banner-card p { font-size: 13px; opacity: .9; margin-bottom: 16px; }
.banner-actions { display: flex; gap: 10px; }

.btn-primary {
  background: rgba(255,255,255,.95);
  color: var(--color-primary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 13px;
  transition: all .15s;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-primary.big { padding: 14px 28px; font-size: 16px; }
.btn-ghost {
  background: rgba(255,255,255,.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,.4);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 13px;
  transition: all .15s;
}
.btn-ghost:hover { background: rgba(255,255,255,.25); }
.btn-ghost.big { padding: 14px 28px; font-size: 16px; color: var(--color-text); border-color: var(--color-border); }
.btn-ghost.big:hover { background: var(--color-bg-soft); }

.hero-main { max-width: var(--container); margin: 0 auto; padding: 0 24px; text-align: center; }
.hero-title {
  font-size: clamp(36px, 5vw, 56px);
  margin: 24px 0 18px;
}
.hero-title .hl { color: var(--color-primary); }
.hero-sub {
  display: inline-block;
  background: var(--color-pink);
  color: var(--color-primary);
  padding: 8px 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}
.hero-meta { color: var(--color-muted); font-size: 14px; margin-bottom: 14px; }
.hero-challenge {
  font-size: 15px;
  color: #333;
  max-width: 720px;
  margin: 0 auto;
}
.hero-challenge .hl { color: var(--color-primary); font-weight: 700; }
.hero-link { color: var(--color-primary); font-weight: 600; }

/* ---------- 通用 section 头 ---------- */
.section-head {
  text-align: center;
  margin-bottom: 40px;
}
.section-head h2 {
  font-size: clamp(26px, 3.2vw, 36px);
  margin-bottom: 10px;
}
.section-head p { color: var(--color-muted); font-size: 16px; }

/* ---------- 模块 2：故事引子 ---------- */
.story {
  background: linear-gradient(180deg, var(--color-cream), #fff);
  padding: 80px 0;
  margin-top: 40px;
}
.story-icon { font-size: 56px; text-align: center; margin-bottom: 18px; }
.story-title {
  font-size: clamp(22px, 2.6vw, 30px);
  text-align: center;
  margin-bottom: 22px;
}
.story-body {
  font-size: 16px;
  color: #444;
  text-align: center;
  line-height: 1.85;
}
.story-body strong { color: var(--color-primary); }
.story-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin: 32px 0 14px;
  flex-wrap: wrap;
}
.btn-like {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  transition: all .2s;
}
.btn-like:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-like.liked {
  background: var(--color-primary);
  color: #fff;
}
.btn-like .like-emoji { font-size: 18px; }
.btn-like .like-count em { font-style: normal; font-weight: 800; }

.btn-secondary {
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  transition: all .15s;
}
.btn-secondary:hover { border-color: var(--color-text); }

.story-note {
  text-align: center;
  color: var(--color-muted);
  font-size: 13px;
  margin-top: 8px;
}

/* ---------- 模块 3：日记时间线 ---------- */
.timeline { padding: 80px 0; }
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 18px;
}
.day-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all .2s;
  cursor: pointer;
}
.day-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}
.day-cover {
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--color-pink), var(--color-cream));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 42px;
  position: relative;
}
.day-cover .day-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(255,255,255,.9);
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
}
.day-info { padding: 14px 16px; }
.day-info .day-num { font-weight: 800; color: var(--color-primary); font-size: 14px; }
.day-info h4 {
  font-size: 14px;
  font-weight: 600;
  margin: 4px 0 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.day-info .day-date { color: var(--color-muted); font-size: 12px; }

.timeline-foot { text-align: center; margin-top: 32px; }

/* ---------- 模块 4：成就展示 ---------- */
.achievements {
  background: var(--color-cream);
  padding: 80px 0;
}
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.stat-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all .2s;
}
.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}
.stat-num {
  font-size: clamp(36px, 4vw, 48px);
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}
.stat-num .unit { font-size: 0.55em; margin-left: 2px; }
.stat-label {
  font-weight: 700;
  margin: 8px 0 6px;
  color: var(--color-text);
}
.stat-desc { color: var(--color-muted); font-size: 13px; }
.achievement-cta { text-align: center; }

/* ---------- 模块 5：技术指南 ---------- */
.guides { padding: 80px 0; }
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}
.guide-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all .2s;
  display: block;
  position: relative;
}
.guide-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}
.guide-icon { font-size: 36px; margin-bottom: 14px; }
.guide-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}
.guide-card p {
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.65;
}
.guide-tag {
  position: absolute;
  top: 18px;
  right: 18px;
  background: var(--color-pink);
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
}

/* ---------- 模块 6：CTA 二次召唤 ---------- */
.cta-final {
  padding: 80px 0;
  background: linear-gradient(135deg, #1a1a1a, #2d0a0e);
  color: #fff;
}
.cta-final h2 {
  font-size: clamp(28px, 3.6vw, 42px);
  margin-bottom: 12px;
}
.cta-final p {
  color: rgba(255,255,255,.7);
  font-size: 16px;
  margin-bottom: 32px;
}
.cta-final-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- 底部 Footer ---------- */
.site-footer {
  background: #0e0e0e;
  color: #ccc;
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-bottom: 40px;
}
.footer-col h4 {
  color: #fff;
  font-size: 14px;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: #aaa;
  padding: 4px 0;
  transition: color .15s;
}
.footer-col a:hover { color: var(--color-accent); }
.footer-bottom {
  border-top: 1px solid #222;
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: #777;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 子页通用 ---------- */
.subpage-hero {
  padding: 60px 0 40px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-cream), #fff);
}
.subpage-hero h1 {
  font-size: clamp(32px, 4.4vw, 48px);
  margin-bottom: 12px;
}
.subpage-hero p { color: var(--color-muted); font-size: 16px; max-width: 640px; margin: 0 auto; }
.subpage-body { padding: 60px 0; }
.subpage-body .container { max-width: var(--container); }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .nav-inner { flex-wrap: wrap; }
  .primary-nav { order: 3; width: 100%; gap: 18px; overflow-x: auto; padding-bottom: 4px; }
  .lang-switch { margin-left: auto; }
  .banner-cards { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .stat-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- 滚动条美化（可选） ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #d1d1d1; border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-primary); }