/* ============================================================
   Enjoy AI Views — Design System (MiMo-inspired)
   ============================================================
   Import this on every page for consistent styling.
   Add page-specific overrides in a local <style> tag.
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors — Warm neutral palette (MiMo-inspired) */
  --bg-primary:     #faf7f5;
  --bg-secondary:   #f5f0eb;
  --bg-card:        #ffffff;
  --bg-hover:       #f8f6f3;

  --text-primary:   #1a1a1a;
  --text-secondary: #555555;
  --text-tertiary:  #888888;
  --text-quaternary:#aaaaaa;

  --accent:         #ff6700;      /* Xiaomi orange */
  --accent-hover:   #e55d00;
  --accent-light:   #fff0e6;

  --border:         #e5e0db;
  --border-light:   #f0ece8;

  --shadow-sm:      0 1px 3px rgba(0,0,0,0.04);
  --shadow-md:      0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg:      0 8px 30px rgba(0,0,0,0.08);

  --radius-sm:      6px;
  --radius-md:      10px;
  --radius-lg:      16px;

  --font-display:   "Noto Serif SC", "PT Serif", Georgia, "Songti SC", serif;
  --font-body:      -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono:      "SF Mono", "Fira Code", Consolas, monospace;

  --nav-height:     60px;
  --content-max:    860px;
  --content-pad:    24px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{
  font-family:var(--font-body);
  background:var(--bg-primary);
  color:var(--text-primary);
  line-height:1.7;
  min-height:100vh;
}
::selection{background:var(--accent-light)}

/* ---------- Typography ---------- */
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.3;color:var(--text-primary)}
h1{font-size:clamp(1.8rem,4vw,2.6rem);letter-spacing:-0.02em}
h2{font-size:clamp(1.3rem,2.5vw,1.6rem);letter-spacing:-0.01em}
h3{font-size:1.15rem}
p{color:var(--text-secondary)}
a{color:var(--accent);text-decoration:none;transition:color 0.2s}
a:hover{color:var(--accent-hover);text-decoration:underline}
code{
  font-family:var(--font-mono);
  background:var(--bg-secondary);
  padding:2px 7px;border-radius:4px;
  font-size:0.85em;color:var(--text-primary);
}
blockquote{
  margin:20px 0;padding:16px 20px;
  border-left:3px solid var(--accent);
  background:var(--accent-light);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:var(--text-secondary);
  font-style:italic;
}

/* ---------- Navigation ---------- */
.nav{
  position:sticky;top:0;z-index:100;
  display:flex;align-items:center;gap:16px;
  height:var(--nav-height);
  padding:0 24px;
  max-width:var(--content-max);margin:0 auto;
  background:rgba(250,247,245,0.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border-light);
}
.nav-logo{
  font-family:var(--font-display);
  font-weight:700;font-size:1.1rem;
  display:flex;align-items:center;gap:8px;
  color:var(--text-primary);
  white-space:nowrap;
}
.nav-logo .logo-badge{
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;
  background:var(--accent);color:#fff;
  border-radius:6px;font-size:14px;
  flex-shrink:0;
}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{
  color:var(--text-tertiary);
  font-size:0.85rem;padding:6px 14px;border-radius:8px;
  transition:all 0.2s;white-space:nowrap;
}
.nav-links a:hover{color:var(--text-primary);background:var(--bg-hover);text-decoration:none}

/* ---------- Footer ---------- */
.site-footer{
  text-align:center;padding:40px 20px;
  color:var(--text-quaternary);font-size:0.82rem;
  border-top:1px solid var(--border-light);
  margin-top:60px;
}
.site-footer .footer-links{margin-top:10px;display:flex;justify-content:center;gap:16px}
.site-footer .footer-links a{color:var(--text-tertiary);text-decoration:none;transition:color 0.2s}
.site-footer .footer-links a:hover{color:var(--accent)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 24px;
  background:var(--accent);color:#fff;
  border:none;border-radius:var(--radius-md);
  font-size:0.9rem;font-weight:600;
  cursor:pointer;transition:all 0.25s;
  text-decoration:none;
}
.btn:hover{background:var(--accent-hover);transform:translateY(-1px);text-decoration:none}
.btn-outline{
  background:transparent;color:var(--text-primary);
  border:1px solid var(--border);
}
.btn-outline:hover{background:var(--bg-hover);border-color:var(--text-tertiary)}

/* ---------- Cards ---------- */
.card{
  background:var(--bg-card);
  border:1px solid var(--border-light);
  border-radius:var(--radius-lg);
  padding:24px;
  transition:all 0.25s;
}
.card:hover{
  border-color:var(--border);
  box-shadow:var(--shadow-sm);
}

/* ---------- Article Card (shared component) ---------- */
.article-card{
  display:flex;gap:16px;
  padding:20px 24px;
  background:var(--bg-card);
  border:1px solid var(--border-light);
  border-radius:var(--radius-lg);
  text-decoration:none;color:inherit;
  transition:all 0.25s;
}
.article-card:hover{
  border-color:var(--border);
  box-shadow:var(--shadow-sm);
  transform:translateY(-2px);
  text-decoration:none;
}
.article-card:active{transform:translateY(0)}

.ac-left{flex-shrink:0;width:56px;text-align:center;padding-top:4px}
.ac-day{
  font-family:var(--font-display);
  font-size:1.6rem;font-weight:700;
  color:var(--text-primary);line-height:1.2;
}
.ac-month{
  font-size:0.7rem;color:var(--text-tertiary);
  text-transform:uppercase;letter-spacing:1px;
}

.ac-body{flex:1;min-width:0}
.ac-meta{display:flex;align-items:center;gap:10px;margin-bottom:5px;flex-wrap:wrap}
.ac-badge{
  display:inline-block;padding:2px 10px;border-radius:10px;
  font-size:0.7rem;font-weight:600;letter-spacing:0.3px;
  background:var(--accent-light);color:var(--accent);
}
.ac-date-text{font-size:0.75rem;color:var(--text-tertiary)}
.ac-title{
  font-family:var(--font-display);
  font-size:1rem;font-weight:700;
  color:var(--text-primary);margin-bottom:4px;line-height:1.4;
}
.ac-desc{font-size:0.85rem;color:var(--text-secondary);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ac-footer{display:flex;align-items:center;gap:12px;margin-top:6px}
.ac-readmore{font-size:0.8rem;color:var(--accent);font-weight:500}
.ac-source{font-size:0.75rem;color:var(--text-quaternary)}


/* ---------- Section Headers ---------- */
.section-header{
  display:flex;align-items:center;gap:12px;
  margin-bottom:24px;
}
.section-header::after{
  content:'';flex:1;height:1px;
  background:linear-gradient(90deg,var(--border),transparent);
}

/* ---------- Filter / Tag Chips ---------- */
.filter-group{display:flex;gap:6px;flex-wrap:wrap}
.filter-chip{
  padding:5px 16px;border-radius:20px;
  border:1px solid var(--border-light);
  background:transparent;color:var(--text-tertiary);
  font-size:0.82rem;cursor:pointer;
  transition:all 0.2s;
  font-family:var(--font-body);
}
.filter-chip:hover{border-color:var(--border);color:var(--text-primary)}
.filter-chip.active{
  background:var(--text-primary);color:#fff;
  border-color:var(--text-primary);
}

/* ---------- Pagination ---------- */
.pagination{display:flex;justify-content:center;align-items:center;gap:6px;margin-top:36px}
.page-btn{
  width:36px;height:36px;border-radius:var(--radius-sm);
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--border-light);
  background:transparent;color:var(--text-tertiary);
  font-size:0.85rem;cursor:pointer;
  transition:all 0.2s;
}
.page-btn:hover{border-color:var(--border);color:var(--text-primary)}
.page-btn.active{background:var(--text-primary);color:#fff;border-color:var(--text-primary);font-weight:600}
.page-btn.arrow{font-size:1rem}
.page-info{font-size:0.8rem;color:var(--text-tertiary);margin:0 8px}

/* ---------- Empty State ---------- */
.empty-state{
  text-align:center;padding:60px 20px;
  color:var(--text-tertiary);
}
.empty-state .emoji{font-size:2.5rem;margin-bottom:12px;display:block}

/* ---------- Spacing Helpers ---------- */
.container{max-width:var(--content-max);margin:0 auto;padding:0 20px 60px}
.section{margin-top:48px}
.gap-sm{gap:8px}
.gap-md{gap:16px}

/* ---------- Tags (article bottom) ---------- */
.tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:32px;justify-content:center}
.tags span{
  background:var(--bg-secondary);
  border:1px solid var(--border-light);
  padding:3px 14px;border-radius:14px;
  font-size:0.78rem;color:var(--text-tertiary);
}

/* ---------- Article TOC (Floating) ---------- */
.article-body{max-width:720px;margin:0 auto;padding:0 20px 40px}

/* Hide TOC sidebar on mobile by default */
.toc{display:none}

/* Desktop: fixed right sidebar */
@media(min-width:768px){
  .toc{display:block;
    position:fixed;right:24px;top:50%;transform:translateY(-50%);
    width:180px;z-index:100;
    background:var(--bg-card);
    border:1px solid var(--border-light);
    border-radius:var(--radius-lg);
    padding:16px 0;
    box-shadow:var(--shadow-sm);
  }
  .toc-title{
    font-size:0.7rem;font-weight:600;
    color:var(--text-tertiary);
    text-transform:uppercase;letter-spacing:1.5px;
    padding:0 16px 10px;
    border-bottom:1px solid var(--border-light);
    margin-bottom:4px;
  }
  .toc-nav{display:flex;flex-direction:column;gap:2px;padding:0 8px}
  .toc-nav a{
    display:block;
    font-size:0.78rem;color:var(--text-tertiary);
    padding:6px 10px;border-radius:var(--radius-sm);
    text-decoration:none;transition:all 0.15s;
    line-height:1.3;
  }
  .toc-nav a:hover{background:var(--bg-secondary);color:var(--text-primary)}
  .toc-nav a:active{background:var(--accent-light);color:var(--accent)}
  .toc-nav a.active{background:var(--accent-light);color:var(--accent);font-weight:500}
  .toc-toggle,.toc-overlay,.toc-drawer{display:none}
}

/* Mobile: floating fab + drawer */
@media(max-width:767px){
  .toc-toggle{
    position:fixed;bottom:150px;right:16px;z-index:100;
    width:48px;height:48px;border-radius:50%;
    background:var(--bg-card);color:var(--text-primary);
    border:none;font-size:1.3rem;cursor:pointer;
    box-shadow:0 4px 20px rgba(0,0,0,0.12),0 0 0 1px rgba(0,0,0,0.04);
    display:flex;align-items:center;justify-content:center;
    transition:all 0.15s;-webkit-tap-highlight-color:transparent;
  }
  .toc-toggle:active{transform:scale(0.9)}
  @media(max-width:640px){
    .toc-toggle{bottom:135px}
  }
  .toc-overlay{
    position:fixed;inset:0;z-index:9999;
    background:rgba(0,0,0,0.3);
    opacity:0;pointer-events:none;transition:opacity 0.25s;
  }
  .toc-overlay.open{opacity:1;pointer-events:auto}
  .toc-drawer{
    position:fixed;bottom:0;left:0;right:0;z-index:10000;
    background:var(--bg-card);
    border-radius:var(--radius-lg) var(--radius-lg) 0 0;
    box-shadow:0 -4px 24px rgba(0,0,0,0.1);
    padding:12px 20px 24px;
    max-height:50vh;overflow-y:auto;
    transform:translateY(100%);transition:transform 0.3s ease;
  }
  .toc-drawer.open{transform:translateY(0)}
  .toc-drawer-bar{
    width:36px;height:4px;border-radius:4px;
    background:var(--border);margin:0 auto 12px;
  }
  .toc-drawer-title{
    font-size:0.85rem;font-weight:600;margin-bottom:10px;
    color:var(--text-primary);
  }
  .toc-drawer-nav{display:flex;flex-direction:column;gap:6px}
  .toc-drawer-nav a{
    display:block;padding:10px 14px;border-radius:var(--radius-md);
    font-size:0.88rem;color:var(--text-primary);
    background:var(--bg-secondary);text-decoration:none;
    transition:all 0.1s;
  }
  .toc-drawer-nav a:active{background:var(--accent-light);color:var(--accent)}
}

/* Hide mobile elements on desktop, hide desktop TOC on mobile */
@media(min-width:768px){.toc-toggle,.toc-overlay,.toc-drawer{display:none!important}}
@media(max-width:767px){.toc{display:none!important}}
@media(max-width:640px){
  :root{--content-pad:16px}
  .article-card{padding:16px;flex-direction:column;gap:8px}
  .ac-left{display:flex;align-items:center;gap:8px;width:auto;text-align:left}
  .ac-day{font-size:1rem}
  .ac-month{font-size:0.65rem}
  .nav{padding:0 14px}
  .nav-links a{padding:4px 10px;font-size:0.8rem}
}

/* ============================================================
   Reading Progress Bar
   ============================================================ */
.progress-bar{position:fixed;top:0;left:0;z-index:999;height:3px;background:var(--accent);width:0%;transition:width 0.1s linear}

/* ============================================================
   Image Modal (click-to-enlarge)
   ============================================================ */
.img-modal{position:fixed;inset:0;z-index:1000;background:rgba(0,0,0,0.85);display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity 0.25s ease;cursor:zoom-out;padding:20px}
.img-modal.open{opacity:1;pointer-events:auto}
.img-modal img{max-width:95vw;max-height:90vh;border-radius:8px;box-shadow:0 8px 40px rgba(0,0,0,0.4);object-fit:contain}
.img-modal .img-close{position:absolute;top:20px;right:24px;color:#fff;font-size:2rem;cursor:pointer;opacity:0.7;transition:opacity 0.2s;line-height:1;background:none;border:none}
.img-modal .img-close:hover{opacity:1}
.article-image img{cursor:zoom-in;transition:transform 0.2s}
.article-image img:hover{transform:scale(1.02)}
/* Hero image between header and body — constrain to body width */
figure.article-image{max-width:720px;margin:0 auto 24px;padding:0 20px}

/* ============================================================
   Related Articles (article footer)
   ============================================================ */
.related-articles{margin:40px 0;padding-top:32px;border-top:1px solid var(--border-light)}
.related-articles h3{font-family:var(--font-display);font-size:1.1rem;font-weight:700;margin-bottom:18px;color:var(--text-primary)}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.related-card{display:block;padding:16px;background:var(--bg-card);border:1px solid var(--border-light);border-radius:var(--radius-md);text-decoration:none;transition:all 0.2s}
.related-card:hover{background:var(--bg-hover);border-color:var(--border);transform:translateY(-2px)}
.related-card .rc-cat{font-size:0.72rem;font-weight:600;color:var(--accent);margin-bottom:4px}
.related-card .rc-title{font-size:0.88rem;font-weight:600;color:var(--text-primary);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card .rc-meta{font-size:0.75rem;color:var(--text-tertiary);margin-top:6px}
.related-empty{text-align:center;padding:20px;color:var(--text-tertiary);font-size:0.85rem}

/* ============================================================
   Archive Page
   ============================================================ */
.archive-page{max-width:720px;margin:0 auto;padding:48px 20px 64px}
.archive-page h1{font-family:var(--font-display);font-size:1.8rem;font-weight:700;margin-bottom:32px}
.archive-year{margin-bottom:36px}
.archive-year .ay-title{font-family:var(--font-display);font-size:1.3rem;font-weight:700;color:var(--text-primary);margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid var(--accent);display:flex;align-items:center;gap:8px}
.archive-year .ay-title .ay-count{font-size:0.78rem;font-weight:400;color:var(--text-tertiary)}
.archive-month{margin-bottom:20px}
.archive-month .am-title{font-size:0.95rem;font-weight:600;color:var(--text-secondary);margin-bottom:8px;display:flex;align-items:center;gap:8px}
.archive-month .am-title .am-count{font-size:0.75rem;font-weight:400;color:var(--text-quaternary)}
.archive-list{list-style:none;margin:0;padding:0}
.archive-list li{padding:6px 0;display:flex;align-items:baseline;gap:10px}
.archive-list .al-date{font-size:0.78rem;color:var(--text-tertiary);white-space:nowrap;min-width:56px}
.archive-list .al-cat{font-size:0.7rem;font-weight:600;color:var(--accent);white-space:nowrap;min-width:48px}
.archive-list .al-title{font-size:0.88rem;color:var(--text-primary);text-decoration:none;transition:color 0.15s}
.archive-list .al-title:hover{color:var(--accent)}
.archive-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin-top:8px}
.archive-grid .ag-cat{display:flex;align-items:center;gap:8px;padding:10px 14px;background:var(--bg-card);border:1px solid var(--border-light);border-radius:var(--radius-md);text-decoration:none;color:var(--text-primary);font-size:0.88rem;font-weight:500;transition:all 0.15s}
.archive-grid .ag-cat:hover{background:var(--accent-light);border-color:var(--accent);color:var(--accent)}
.archive-grid .ag-cat .ag-num{font-size:0.75rem;font-weight:400;color:var(--text-tertiary)}

/* Floating share button */
.share-float-btn{position:fixed;right:20px;bottom:100px;z-index:9998;width:48px;height:48px;border-radius:50%;background:var(--bg-card);color:var(--text-primary);font-size:1.2rem;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 20px rgba(0,0,0,0.12),0 0 0 1px rgba(0,0,0,0.04);opacity:0;transform:scale(0.8);pointer-events:none;transition:all 0.25s cubic-bezier(0.32,0.72,0,1);-webkit-user-select:none;user-select:none}
.share-float-btn.visible{opacity:1;transform:scale(1);pointer-events:auto}
.share-float-btn:hover{box-shadow:0 8px 28px rgba(0,0,0,0.18),0 0 0 1px rgba(0,0,0,0.06);transform:scale(1.05)}
.share-float-btn:active{transform:scale(0.92)}
.share-float-btn.bottom-near{opacity:0;transform:scale(0.8);pointer-events:none}
@media(max-width:640px){.share-float-btn{right:16px;bottom:80px;width:44px;height:44px;font-size:1.1rem}}\n