/* ============================================
   超丽的科技 — 个人博客
   科技是超美丽的
   Warm · Minimal · Personal
   ============================================ */

:root {
  --bg: #faf8f5;
  --bg-card: #ffffff;
  --bg-code: #f0ede8;
  --text: #2c3e50;
  --text-soft: #5a6a7a;
  --text-light: #8a9aaa;
  --accent: #5b67ca;
  --accent-light: #7984d8;
  --accent-glow: rgba(91, 103, 202, 0.08);
  --accent2: #e8a87c;
  --accent2-light: #f0c4a0;
  --border: #e8e0d8;
  --border-light: #f0ebe4;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 2px 20px rgba(44, 62, 80, 0.06);
  --shadow-hover: 0 8px 40px rgba(44, 62, 80, 0.10);
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --font-display: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Noto Sans SC', 'Inter', -apple-system, sans-serif;
}

/* Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent);
  color: white;
}

/* ============================================
   HEADER / HERO
   ============================================ */
.blog-header {
  position: relative;
  padding: 100px 24px 80px;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(160deg, #fdfcf9 0%, #f5f0ea 50%, #efe7dd 100%);
}

.blog-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(91, 103, 202, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(232, 168, 124, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

/* Decorative floating shapes */
.blog-header-deco {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.3;
}

.deco-1 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(91, 103, 202, 0.06) 0%, transparent 70%);
  top: -80px;
  left: -80px;
  animation: float 12s ease-in-out infinite;
}

.deco-2 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(232, 168, 124, 0.08) 0%, transparent 70%);
  bottom: -40px;
  right: -40px;
  animation: float 15s ease-in-out infinite reverse;
}

.deco-3 {
  width: 120px;
  height: 120px;
  border: 2px solid rgba(91, 103, 202, 0.06);
  top: 50%;
  left: 10%;
  animation: float 10s ease-in-out infinite 2s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(10px, -15px); }
  66% { transform: translate(-5px, 10px); }
}

.blog-title-wrapper {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.blog-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 5px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.blog-title {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  color: var(--text);
}

.blog-title .highlight {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.blog-title .em-dash {
  color: var(--accent2);
  -webkit-text-fill-color: var(--accent2);
}

.blog-subtitle {
  font-size: 1.1rem;
  color: var(--text-soft);
  font-weight: 300;
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.blog-meta {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-light);
}

.blog-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.blog-meta .meta-icon {
  font-size: 1rem;
}

/* ============================================
   NAV
   ============================================ */
.blog-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
}

.blog-nav-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.blog-nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.blog-nav-links a {
  color: var(--text-soft);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

.blog-nav-links a:hover,
.blog-nav-links a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.blog-nav-brand {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 1px;
}

.blog-nav-brand .brand-accent {
  color: var(--accent);
}

/* ============================================
   CONTAINER
   ============================================ */
.blog-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   SECTION
   ============================================ */
.blog-section {
  padding: 80px 0;
}

.blog-section-header {
  margin-bottom: 48px;
}

.blog-section-header .section-number {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.blog-section-header h2 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.3px;
  margin-bottom: 8px;
}

.blog-section-header p {
  color: var(--text-soft);
  font-size: 0.95rem;
  font-weight: 300;
  max-width: 500px;
}

/* ============================================
   3 COLUMN CARDS
   ============================================ */
.columns-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.column-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.column-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  opacity: 0;
  transition: opacity 0.3s;
}

.column-card:hover {
  transform: translateY(-4px);
  border-color: var(--border);
  box-shadow: var(--shadow-hover);
}

.column-card:hover::before {
  opacity: 1;
}

.column-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 18px;
}

.column-icon.purple {
  background: rgba(91, 103, 202, 0.08);
}

.column-icon.peach {
  background: rgba(232, 168, 124, 0.12);
}

.column-icon.teal {
  background: rgba(69, 179, 157, 0.10);
}

.column-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.column-card > p {
  color: var(--text-soft);
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 18px;
}

.column-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.column-tags span {
  font-size: 0.72rem;
  background: var(--bg-code);
  color: var(--text-light);
  padding: 3px 10px;
  border-radius: 100px;
}

.column-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition);
}

.column-link:hover {
  gap: 10px;
  color: var(--accent-light);
}

/* ============================================
   ABOUT / INTRO
   ============================================ */
.about-me {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 40px 36px;
  display: flex;
  gap: 40px;
  align-items: flex-start;
}

.about-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  color: white;
}

.about-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.about-content .about-role {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 14px;
}

.about-content p {
  color: var(--text-soft);
  font-size: 0.92rem;
  line-height: 1.8;
  margin-bottom: 8px;
}

/* ============================================
   RECENT / LATEST POSTS (placeholder)
   ============================================ */
.recent-posts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 24px;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  display: block;
}

.post-card:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.post-card .post-date {
  font-size: 0.75rem;
  color: var(--text-light);
  margin-bottom: 8px;
}

.post-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}

.post-card p {
  font-size: 0.85rem;
  color: var(--text-soft);
  line-height: 1.6;
}

.post-card .post-tag {
  display: inline-block;
  font-size: 0.7rem;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 2px 10px;
  border-radius: 100px;
  margin-top: 12px;
  font-weight: 500;
}

/* ============================================
   TOOLS SECTION
   ============================================ */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 24px;
  transition: var(--transition);
  text-align: center;
}

.tool-card:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.tool-card .tool-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.tool-card h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.tool-card p {
  font-size: 0.82rem;
  color: var(--text-light);
  line-height: 1.5;
}

.tool-card .tool-status {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 100px;
  margin-top: 12px;
}

.tool-status.live {
  background: rgba(69, 179, 157, 0.10);
  color: #45b39d;
}

.tool-status.beta {
  background: rgba(232, 168, 124, 0.12);
  color: #d4925a;
}

.tool-status.idea {
  background: rgba(91, 103, 202, 0.08);
  color: var(--accent);
}

/* ============================================
   FOOTER
   ============================================ */
.blog-footer {
  border-top: 1px solid var(--border-light);
  padding: 40px 0 28px;
  margin-top: 40px;
  text-align: center;
}

.blog-footer-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.blog-footer p {
  color: var(--text-light);
  font-size: 0.82rem;
  line-height: 1.6;
}

.blog-footer .footer-heart {
  color: var(--accent2);
}

.blog-footer .footer-signature {
  font-size: 0.78rem;
  margin-top: 8px;
  font-style: italic;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 860px) {
  .columns-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .recent-posts {
    grid-template-columns: 1fr;
  }

  .about-me {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .blog-title {
    font-size: 2rem;
  }

  .blog-header {
    padding: 80px 20px 60px;
  }

  .blog-section {
    padding: 50px 0;
  }

  .tools-grid {
    grid-template-columns: 1fr;
  }

  .blog-meta {
    flex-direction: column;
    gap: 6px;
  }

  .blog-nav-links {
    gap: 16px;
  }

  .column-card {
    padding: 28px 22px;
  }
}