/* lyycq.cn Editorial Design System v1.0
 * 调色板 / 字体 / 布局 tokens
 * 暗色/明亮双模：[data-theme="dark"] / 默认 light
 */

:root {
  --c-bg:        #F7F6F3;
  --c-surface:   #FFFFFF;
  --c-surface-2: #F9F9F8;
  --c-border:    #EAEAEA;
  --c-text:      #111111;
  --c-text-2:    #2F3437;
  --c-muted:     #787774;
  --c-accent-red:    #FDEBEC;
  --c-accent-red-fg: #9F2F2D;
  --c-accent-blue:   #E1F3FE;
  --c-accent-blue-fg:#1F6C9F;
  --c-accent-green:  #EDF3EC;
  --c-accent-green-fg:#346538;
  --c-accent-yellow: #FBF3DB;
  --c-accent-yellow-fg:#956400;
  --c-accent-purple: #F0EBFA;
  --c-accent-purple-fg:#5B3D8E;
  --f-serif: 'Newsreader', 'Source Serif Pro', 'Noto Serif SC', Georgia, '宋体', serif;
  --f-sans:  'Inter Tight', -apple-system, 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --f-mono:  'JetBrains Mono', 'SF Mono', Consolas, monospace;
  --fs-display: clamp(2.5rem, 5vw, 4.5rem);
  --fs-h1:      clamp(2rem, 4vw, 3rem);
  --fs-h2:      clamp(1.625rem, 3vw, 2.25rem);
  --fs-h3:      clamp(1.25rem, 2vw, 1.5rem);
  --fs-h4:      1.125rem;
  --fs-body:    1rem;
  --fs-small:   0.875rem;
  --fs-tiny:    0.75rem;
  --lh-tight:   1.1;
  --lh-snug:    1.3;
  --lh-normal:  1.6;
  --lh-loose:   1.8;
  --sp-1: 4px;   --sp-2: 8px;   --sp-3: 12px;  --sp-4: 16px;
  --sp-5: 24px;  --sp-6: 32px;  --sp-7: 48px;  --sp-8: 64px;
  --sp-9: 96px;  --sp-10: 128px; --sp-11: 160px;
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --shadow-1: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-2: 0 4px 12px rgba(0,0,0,0.05);
  --container: 1200px;
  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  /* === blog 模块共享色板（与 5 模板 v3 蓝紫一致） === */
  --blog-blue:        #1677FF;
  --blog-blue-50:     #E6F0FF;
  --blog-blue-600:    #0958D9;
  --blog-purple:      #7C3AED;
  --blog-purple-50:   #F1ECFE;
  --blog-cyan:        #0891B2;
  --blog-green:       #10B981;
  --blog-orange:      #FF7A45;
  --blog-red:         #EF4444;
  --blog-pink:        #DB2777;
  --blog-yellow:      #F59E0B;
}

[data-theme="dark"] {
  --c-bg:        #0F0F0E;
  --c-surface:   #1A1A19;
  --c-surface-2: #232321;
  --c-border:    rgba(255,255,255,0.08);
  --c-text:      #F5F5F0;
  --c-text-2:    #D6D5CE;
  --c-muted:     #888680;
  --c-accent-red:    #2A1F1F;
  --c-accent-red-fg: #D27A78;
  --c-accent-blue:   #142028;
  --c-accent-blue-fg:#5DA8D6;
  --c-accent-green:  #19241A;
  --c-accent-green-fg:#6FA771;
  --c-accent-yellow: #2A2419;
  --c-accent-yellow-fg:#D6AC4A;
  --c-accent-purple: #1F1A29;
  --c-accent-purple-fg:#9F88C2;
  --shadow-1: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-2: 0 4px 12px rgba(0,0,0,0.3);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --c-bg:        #0F0F0E;
    --c-surface:   #1A1A19;
    --c-surface-2: #232321;
    --c-border:    rgba(255,255,255,0.08);
    --c-text:      #F5F5F0;
    --c-text-2:    #D6D5CE;
    --c-muted:     #888680;
    --c-accent-red:    #2A1F1F;
    --c-accent-red-fg: #D27A78;
    --c-accent-blue:   #142028;
    --c-accent-blue-fg:#5DA8D6;
    --c-accent-green:  #19241A;
    --c-accent-green-fg:#6FA771;
    --c-accent-yellow: #2A2419;
    --c-accent-yellow-fg:#D6AC4A;
    --c-accent-purple: #1F1A29;
    --c-accent-purple-fg:#9F88C2;
    --shadow-1: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-2: 0 4px 12px rgba(0,0,0,0.3);
  }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--f-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition), color var(--transition);
}
img, picture, video, canvas, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: transparent; }
ul, ol { list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .container { padding: 0 16px; } }
.section { padding: var(--sp-9) 0; }
@media (max-width: 768px) { .section { padding: var(--sp-8) 0; } }
.section__kicker {
  display: inline-block;
  font-family: var(--f-sans);
  font-size: var(--fs-tiny);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent-blue-fg);
  background: var(--c-accent-blue);
  padding: 4px 10px;
  border-radius: 9999px;
  margin-bottom: var(--sp-4);
}
.section__title {
  font-family: var(--f-serif);
  font-size: var(--fs-h2);
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: var(--sp-4);
  max-width: 720px;
}
.section__desc {
  font-size: 1.0625rem;
  line-height: var(--lh-loose);
  color: var(--c-text-2);
  max-width: 640px;
  margin-bottom: var(--sp-7);
}
.section__head { margin-bottom: var(--sp-7); }
.section__head--center { text-align: center; }
.section__head--center .section__title,
.section__head--center .section__desc { margin-left: auto; margin-right: auto; }
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: var(--sp-6);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); border-color: var(--c-text-2); }
.card__cat {
  display: inline-block;
  font-size: var(--fs-tiny);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--c-accent-blue-fg);
  background: var(--c-accent-blue);
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: var(--sp-3);
}
.card__title {
  font-family: var(--f-serif);
  font-size: var(--fs-h4);
  line-height: var(--lh-snug);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--c-text);
  margin-bottom: var(--sp-3);
}
.card__excerpt { font-size: var(--fs-small); line-height: var(--lh-normal); color: var(--c-text-2); margin-bottom: var(--sp-4); }
.card__meta { display: flex; gap: var(--sp-4); font-size: var(--fs-tiny); color: var(--c-muted); }
.bento { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--sp-5); }
@media (max-width: 768px) { .bento { grid-template-columns: 1fr; gap: var(--sp-4); } }
.bento > * { grid-column: span 4; }
.bento > .span-6 { grid-column: span 6; }
.bento > .span-8 { grid-column: span 8; }
.bento > .span-12 { grid-column: span 12; }
@media (max-width: 1024px) { .bento > *, .bento > .span-6, .bento > .span-8 { grid-column: span 6; } }
@media (max-width: 768px) { .bento > *, .bento > .span-6, .bento > .span-8, .bento > .span-12 { grid-column: span 1; } }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 10px 18px;
  border-radius: var(--r-sm);
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: all var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}
.btn--primary { background: var(--c-text); color: var(--c-bg); }
.btn--primary:hover { background: #333; }
.btn--secondary { border-color: var(--c-border); color: var(--c-text); background: transparent; }
.btn--secondary:hover { background: var(--c-surface-2); }
.btn--lg { padding: 14px 24px; font-size: var(--fs-body); }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 9999px;
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  font-size: var(--fs-tiny);
  color: var(--c-text-2);
  transition: all var(--transition);
  cursor: pointer;
}
.chip:hover, .chip.is-active { background: var(--c-text); color: var(--c-bg); border-color: var(--c-text); }
.hero { padding: var(--sp-10) 0 var(--sp-9); position: relative; overflow: hidden; }
.hero__title {
  font-family: var(--f-serif);
  font-size: var(--fs-display);
  line-height: var(--lh-tight);
  letter-spacing: -0.03em;
  font-weight: 600;
  color: var(--c-text);
  max-width: 880px;
  margin-bottom: var(--sp-5);
}
.hero__title em { font-style: italic; font-weight: 500; color: var(--c-accent-blue-fg); }
.hero__sub { font-size: 1.125rem; line-height: var(--lh-loose); color: var(--c-text-2); max-width: 640px; margin-bottom: var(--sp-6); }
.hero__cta { display: flex; gap: var(--sp-3); flex-wrap: wrap; }
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--c-bg) 92%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--c-border);
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; gap: var(--sp-5); }
.site-logo { display: flex; align-items: center; gap: 10px; }
.site-logo__icon { width: 32px; height: 32px; border-radius: 6px; }
.site-logo__text { font-family: var(--f-serif); font-weight: 600; font-size: 1.0625rem; line-height: 1.2; }
.site-logo__sub { font-size: var(--fs-tiny); color: var(--c-muted); }
.site-nav { display: flex; gap: var(--sp-5); align-items: center; }
.site-nav a { font-size: var(--fs-small); color: var(--c-text-2); transition: color var(--transition); }
.site-nav a:hover, .site-nav a.is-active { color: var(--c-text); }
.site-header__cta { display: flex; gap: var(--sp-3); align-items: center; }
.theme-toggle {
  width: 36px; height: 36px;
  border: 1px solid var(--c-border);
  border-radius: 8px;
  background: var(--c-surface);
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--c-text-2);
  transition: all var(--transition);
}
.theme-toggle:hover { background: var(--c-surface-2); color: var(--c-text); }
.theme-toggle svg { width: 16px; height: 16px; }
@media (max-width: 768px) { .site-nav { display: none; } }
.site-footer { background: var(--c-surface-2); border-top: 1px solid var(--c-border); padding: var(--sp-9) 0 var(--sp-6); margin-top: var(--sp-10); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--sp-7); margin-bottom: var(--sp-8); }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-5); } }
.footer-col__title { font-size: var(--fs-tiny); font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-muted); margin-bottom: var(--sp-4); }
.footer-col a { display: block; padding: 4px 0; color: var(--c-text-2); font-size: var(--fs-small); }
.footer-col a:hover { color: var(--c-text); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: var(--sp-5); border-top: 1px solid var(--c-border); font-size: var(--fs-tiny); color: var(--c-muted); }
@media (max-width: 640px) { .footer-bottom { flex-direction: column; gap: var(--sp-3); } }
.muted { color: var(--c-muted); }
.text-2 { color: var(--c-text-2); }
.serif { font-family: var(--f-serif); }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.mt-6 { margin-top: var(--sp-6); }
.mb-6 { margin-bottom: var(--sp-6); }
.text-center { text-align: center; }
.max-w-prose { max-width: 720px; margin: 0 auto; }
:focus-visible { outline: 2px solid var(--c-text); outline-offset: 3px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; top: -100px; left: 0; background: var(--c-text); color: var(--c-bg); padding: 8px 16px; z-index: 999; text-decoration: none; font-size: var(--fs-small); }
.skip-link:focus { top: 0; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}