:root {
    --sky: #5BB8D4; --sky-light: #A8D8EA; --sky-pale: #E8F6FB; --sky-deep: #2A8BAD;
    --white: #FFFFFF; --off-white: #F7FCFE;
    --text-dark: #1A2E35; --text-mid: #3D5A66; --text-light: #6A8FA0;
    --accent: #1E7EA1; --border: rgba(91,184,212,0.18);
    --shadow: 0 4px 32px rgba(42,139,173,0.10);
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body { font-family: 'DM Sans', sans-serif; background: var(--off-white); color: var(--text-dark); }

  nav {
    background: rgba(255,255,255,0.97); border-bottom: 1px solid var(--border);
    padding: 0 5%; height: 70px; display: flex; align-items: center; justify-content: space-between;
    position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 20px rgba(91,184,212,0.08);
  }
  .nav-logo { display: flex; align-items: center; gap: 11px; text-decoration: none; }
  .nav-logo img { height: 52px; width: auto; display: block; flex-shrink: 0; }
  .nav-logo-text { font-family: 'Cormorant Garamond', serif; font-size: 1.45rem; font-weight: 600; color: var(--accent); line-height: 1.1; }
  .nav-logo-text span { display: block; font-size: 0.68rem; font-family: 'DM Sans', sans-serif; font-weight: 400; color: var(--text-light); letter-spacing: 0.12em; text-transform: uppercase; }
  .nav-back { font-size: 0.88rem; color: var(--accent); text-decoration: none; font-weight: 500; }
  .nav-back:hover { text-decoration: underline; }

  .page-hero { background: linear-gradient(135deg, #1E7EA1, #2A8BAD, #5BB8D4); color: white; padding: 60px 5%; text-align: center; }
  .page-hero h1 { font-family: 'Cormorant Garamond', serif; font-size: 2.8rem; font-weight: 600; margin-bottom: 0.5rem; }
  .page-hero p { font-size: 0.97rem; opacity: 0.82; max-width: 520px; margin: 0 auto; line-height: 1.7; }

  .blog-wrap { max-width: 820px; margin: 0 auto; padding: 64px 5% 80px; }

  /* Article */
  .article { background: var(--white); border-radius: 22px; border: 1px solid var(--border); box-shadow: var(--shadow); overflow: hidden; margin-bottom: 2.4rem; }
  .article-header { padding: 2rem 2.4rem 1.2rem; border-bottom: 1px solid var(--border); }
  .article-meta { display: flex; align-items: center; gap: 1rem; margin-bottom: 0.9rem; flex-wrap: wrap; }
  .article-tag { display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); background: var(--sky-pale); padding: 4px 12px; border-radius: 50px; border: 1px solid var(--border); }
  .article-date { font-size: 0.8rem; color: var(--text-light); }
  .article h2 { font-family: 'Cormorant Garamond', serif; font-size: 1.9rem; font-weight: 600; color: var(--text-dark); line-height: 1.2; margin-bottom: 0.8rem; }
  .article-intro { font-size: 1rem; color: var(--text-mid); line-height: 1.75; font-style: italic; }
  .article-body { padding: 1.6rem 2.4rem 2rem; }
  .article-body h3 { font-family: 'Cormorant Garamond', serif; font-size: 1.25rem; font-weight: 600; color: var(--text-dark); margin: 1.6rem 0 0.5rem; }
  .article-body h3:first-child { margin-top: 0; }
  .article-body p { font-size: 0.93rem; color: var(--text-mid); line-height: 1.8; margin-bottom: 0.9rem; }
  .article-body ul, .article-body ol { margin: 0.5rem 0 1rem 1.4rem; }
  .article-body li { font-size: 0.93rem; color: var(--text-mid); line-height: 1.7; margin-bottom: 0.3rem; }
  .article-tip { background: var(--sky-pale); border-left: 4px solid var(--sky); border-radius: 0 12px 12px 0; padding: 1rem 1.4rem; margin: 1.2rem 0; }
  .article-tip p { margin-bottom: 0; font-size: 0.9rem; }
  .article-divider { border: none; border-top: 2px solid var(--border); margin: 2.4rem 0; }
  .article-author { display: flex; align-items: center; gap: 12px; padding: 1.2rem 2.4rem; background: var(--off-white); border-top: 1px solid var(--border); }
  .author-avatar { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--sky-light), var(--sky)); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; flex-shrink: 0; }
  .author-info { font-size: 0.83rem; color: var(--text-mid); }
  .author-info strong { display: block; color: var(--text-dark); font-size: 0.88rem; }

  /* Sidebar CTA */
  .blog-cta { background: var(--accent); border-radius: 18px; padding: 1.8rem; color: white; margin-bottom: 2.4rem; text-align: center; }
  .blog-cta h3 { font-family: 'Cormorant Garamond', serif; font-size: 1.5rem; margin-bottom: 0.5rem; }
  .blog-cta p { font-size: 0.88rem; opacity: 0.85; margin-bottom: 1.2rem; line-height: 1.6; }
  .btn-white { background: white; color: var(--accent); padding: 11px 24px; border-radius: 50px; font-weight: 600; text-decoration: none; display: inline-block; transition: all 0.2s; font-size: 0.9rem; }
  .btn-white:hover { background: var(--sky-pale); transform: translateY(-2px); }

  footer { background: var(--text-dark); color: rgba(255,255,255,0.5); text-align: center; padding: 2rem 5%; font-size: 0.83rem; line-height: 1.8; }
  footer a { color: var(--sky-light); text-decoration: none; }