.header{background:linear-gradient(90deg,#2a4365,#4c8599);padding:1.5rem 2rem;box-shadow:0 4px 12px #0000001a;position:sticky;top:0;z-index:1000}.header-content{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.header-title{font-family:Playfair Display,serif;font-size:2rem;color:#fff;text-shadow:0 2px 4px rgba(0,0,0,.2)}.header-nav{display:flex;gap:2rem}.nav-link{font-family:Inter,sans-serif;font-size:1.1rem;font-weight:500;color:#e2e8f0;text-decoration:none;padding:.5rem 1rem;border-radius:8px;transition:background-color .3s ease,color .3s ease,transform .2s ease}.nav-link:hover{background-color:#ffffff1a;transform:translateY(-2px)}.nav-link.active{background-color:#d4af37;color:#1a202c;font-weight:600}@media (max-width: 768px){.header{padding:1rem}.header-content{flex-direction:column;gap:1rem}.header-title{font-size:1.5rem}.header-nav{gap:1rem;flex-wrap:wrap;justify-content:center}.nav-link{font-size:1rem;padding:.5rem}}.introduction{background:url(https://images.unsplash.com/photo-1507525428034-b723cf961d3e?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80) no-repeat center center;background-size:cover;min-height:80vh;display:flex;justify-content:center;align-items:center;position:relative;color:#fff;text-align:center;padding:2rem;animation:fadeIn .5s ease forwards}.introduction:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:#00000080;z-index:1}.intro-content{position:relative;z-index:2;max-width:800px;padding:2rem;background:#ffffff1a;border-radius:12px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 4px 20px #0003}.intro-title{font-family:Playfair Display,serif;font-size:3rem;font-weight:700;margin-bottom:1.5rem;text-shadow:0 2px 4px 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0;border-radius:8px;box-shadow:0 2px 6px #0000001a}.hexagram-section .no-image{font-family:Inter,sans-serif;font-size:1rem;color:#4a5568;font-style:italic;margin:1.5rem 0}.hexagram-section .description{margin-top:1.5rem}.hexagram-section .description p{font-family:Inter,sans-serif;font-size:1.1rem;color:#4a5568;line-height:1.6}.lines{display:flex;flex-direction:column-reverse;align-items:center}.line{width:200px;height:20px;margin:6px 0}.broken{border-top:10px solid transparent;border-bottom:10px solid transparent;background:linear-gradient(to right,#2A4365 40%,transparent 40%,transparent 60%,#2A4365 60%)}.unbroken{border-top:10px solid #2A4365}.broken-changing{border-top:10px solid transparent;border-bottom:10px solid transparent;background:linear-gradient(to right,#2A4365 40%,transparent 40%,transparent 60%,#2A4365 60%);position:relative}.unbroken-changing{border-top:10px solid 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p{margin-bottom:1.5rem}@media (max-width: 768px){.about{padding:1rem}.about h2{font-size:2rem}.about-content{font-size:1rem}}.footer{background:#2a4365;padding:1rem;text-align:center;color:#e2e8f0;font-family:Inter,sans-serif;font-size:.9rem}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;font-family:Inter,sans-serif;color:#333;background-color:#f5f7fa}.app{display:flex;flex-direction:column;min-height:100vh}.main-content{flex:1;padding:2rem;display:flex;justify-content:center;align-items:center}body{margin:0;font-family:Noto Sans SC,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}