:root{--color-red: #D32F2F;--color-red-dark: #B71C1C;--color-gold: #D4AF37;--color-gold-light: #F9E79F;--color-dark: #2D3748;--color-text: #2D3748;--color-text-light: #718096;--color-cream: #FFFCF5;--color-green: #388E3C;--color-white: #FFFFFF;--color-gray-100: #F7FAFC;--color-gray-200: #EDF2F7;--color-gray-300: #E2E8F0;--color-gray-800: #2D3748;--color-gray-900: #1A202C;--font-serif: "Playfair Display", serif;--font-sans: "Inter", sans-serif;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--radius-md: .375rem;--radius-lg: .5rem;--radius-xl: .75rem;--radius-full: 9999px}*{box-sizing:border-box}body{margin:0;font-family:var(--font-sans);background-color:var(--color-cream);color:var(--color-text);line-height:1.5}h1,h2,h3,h4,h5,h6{font-family:var(--font-serif);margin-top:0}p{margin-top:0}a{text-decoration:none;color:inherit}ul{list-style:none;padding:0;margin:0}button{cursor:pointer;border:none;background:none;font-family:inherit;font-size:1rem}.container{width:100%;max-width:1280px;margin:0 auto;padding:0 1rem}.text-center{text-align:center}.text-right{text-align:right}.font-bold{font-weight:700}.uppercase{text-transform:uppercase}.italic{font-style:italic}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.flex-grow{flex-grow:1}.gap-2{gap:.5rem}.gap-3{gap:.75rem}.gap-4{gap:1rem}.gap-6{gap:1.5rem}.gap-8{gap:2rem}.grid{display:grid;grid-template-columns:1fr;gap:1.5rem}@media (min-width: 768px){.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-5{grid-template-columns:repeat(5,1fr)}.grid-12{grid-template-columns:repeat(12,1fr)}.col-span-5{grid-column:span 5}.col-span-7{grid-column:span 7}.md-pl-10{padding-left:2.5rem}.hidden-md{display:none}.block-md{display:block}}@media (max-width: 767px){.hidden-mobile{display:none}.block-mobile{display:block}}.section-padding{padding:4rem 1rem}.mb-2{margin-bottom:.5rem}.mb-4{margin-bottom:1rem}.mb-6{margin-bottom:1.5rem}.mb-8{margin-bottom:2rem}.mb-12{margin-bottom:3rem}.mt-12{margin-top:3rem}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:var(--radius-full);font-weight:500;transition:all .3s ease}.btn-primary{background-color:var(--color-red);color:var(--color-white);box-shadow:var(--shadow-lg)}.btn-primary:hover{background-color:var(--color-red-dark);transform:scale(1.05)}.card{background-color:var(--color-white);border-radius:var(--radius-xl);padding:1.5rem;box-shadow:var(--shadow-sm);border:1px solid var(--color-gray-100)}.card:hover{box-shadow:var(--shadow-md)}.divider-gold{width:6rem;height:4px;background-color:var(--color-gold);margin:0 auto}.navbar{position:fixed;top:0;left:0;width:100%;z-index:1000;background-color:#7f1d1df2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--color-gold);box-shadow:var(--shadow-lg);color:#fff}.nav-container{max-width:1280px;margin:0 auto;padding:0 1rem;height:5rem;display:flex;align-items:center;justify-content:space-between}.nav-brand{display:flex;align-items:center;cursor:pointer}.logo-icon{background-color:var(--color-gold);padding:.5rem;border-radius:50%;color:#7f1d1d;margin-right:.75rem}.brand-text h1{font-size:1.25rem;font-weight:700;margin:0;text-transform:uppercase;letter-spacing:.05em;color:#fff}.brand-text p{font-size:.75rem;color:#fde047;text-transform:uppercase;letter-spacing:.1em;font-weight:600}.nav-links{display:flex;gap:.5rem}.nav-item{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;border-radius:var(--radius-full);font-size:.875rem;font-weight:500;color:#ffffffe6;transition:all .3s;border:1px solid transparent}.nav-item:hover{background-color:#ffffff1a;color:#fde047}.nav-item.active{background-color:var(--color-gold);color:#7f1d1d;font-weight:700;box-shadow:var(--shadow-lg)}.mobile-menu-btn{color:#fde047}.mobile-menu{background-color:#7f1d1d;border-top:1px solid #991b1b;padding:1rem}.mobile-nav-item{display:flex;align-items:center;gap:.75rem;width:100%;padding:1rem;border-radius:var(--radius-md);color:#e5e7eb;border-left:4px solid transparent}.mobile-nav-item.active{background-color:#450a0a;color:#fde047;border-left-color:var(--color-gold)}.hero{position:relative;min-height:600px;display:flex;align-items:center;justify-content:center;background-color:var(--color-gray-900);overflow:hidden}.hero-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background-color:#0006;z-index:10}.hero-bg-img{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;object-fit:cover;z-index:1}.hero-content{position:relative;z-index:20;max-width:56rem;margin:0 auto;padding:6rem 1rem;text-align:center}.hero-title{font-size:2.5rem;font-weight:700;color:#fff;margin-bottom:1.5rem;line-height:1.2;text-shadow:0 4px 6px rgba(0,0,0,.3)}@media (min-width: 768px){.hero-title{font-size:3.75rem}}.text-gold{color:var(--color-gold)}.hero-desc{font-size:1.125rem;color:#f3f4f6;margin-bottom:2rem;max-width:42rem;margin-left:auto;margin-right:auto;font-weight:300;text-shadow:0 2px 4px rgba(0,0,0,.3)}.feature-box{background-color:#fff;padding:1.5rem;border-radius:var(--radius-lg);text-align:center;border:1px solid var(--color-gray-100);box-shadow:var(--shadow-sm);transition:box-shadow .3s}.feature-box:hover{box-shadow:var(--shadow-md)}.feature-icon{margin:0 auto .75rem;color:var(--color-green)}.feature-title{font-weight:700;margin-bottom:.5rem;color:var(--color-dark)}.feature-text{font-size:.875rem;color:var(--color-text-light)}.list-check{display:flex;flex-direction:column;gap:1rem}.list-item{display:flex;gap:.75rem;align-items:flex-start}.list-icon{color:var(--color-green);flex-shrink:0;margin-top:.25rem}.list-content strong{color:var(--color-dark);display:block}.list-content{color:var(--color-text)}.image-frame{border-radius:var(--radius-xl);overflow:hidden;box-shadow:var(--shadow-xl);border:4px solid white;transform:rotate(2deg);transition:transform .5s}.image-frame:hover{transform:rotate(0)}.image-frame img{width:100%;height:auto;display:block}.yin-card{background-color:#fff;padding:2rem;border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);border-left:4px solid #9ca3af;margin-bottom:2rem}.sub-card{background-color:#fff;padding:1.5rem;border-radius:var(--radius-lg);border:1px solid var(--color-gray-200)}.element-card{background-color:#fff;border-radius:var(--radius-xl);overflow:hidden;box-shadow:var(--shadow-md);transition:box-shadow .3s}.element-card:hover{box-shadow:var(--shadow-xl)}.element-header{height:6rem;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700}.element-body{padding:1rem}.label-xs{font-size:.75rem;font-weight:700;color:#9ca3af;text-transform:uppercase;margin-bottom:.25rem}.el-kim{background-color:#f3f4f6;color:#1f2937;border-bottom:1px solid #d1d5db}.el-moc{background-color:#dcfce7;color:#166534;border-bottom:1px solid #86efac}.el-thuy{background-color:#dbeafe;color:#1e40af;border-bottom:1px solid #93c5fd}.el-hoa{background-color:#fee2e2;color:#991b1b;border-bottom:1px solid #fca5a5}.el-tho{background-color:#fef9c3;color:#854d0e;border-bottom:1px solid #fde047}.bagua-container{background-color:#fff;border-radius:1rem;overflow:hidden;box-shadow:var(--shadow-xl);border:1px solid var(--color-gray-100)}.bagua-content{padding:3rem;display:flex;flex-direction:column;justify-content:center}.chat-window{background-color:#fff;border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);border:1px solid rgba(212,175,55,.3);display:flex;flex-direction:column;height:600px;overflow:hidden}.chat-header{background:linear-gradient(to right,var(--color-gold),#ca8a04);padding:1rem;display:flex;justify-content:space-between;align-items:center;color:#fff}.chat-messages{flex:1;overflow-y:auto;padding:1rem;background-color:var(--color-cream);display:flex;flex-direction:column;gap:1rem}.message-row{display:flex;width:100%}.message-row.user{justify-content:flex-end}.message-row.model{justify-content:flex-start}.message-bubble{max-width:80%;display:flex;gap:.5rem}.message-row.user .message-bubble{flex-direction:row-reverse}.avatar{width:2rem;height:2rem;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}.avatar.user{background-color:var(--color-gray-100);color:var(--color-gray-800)}.avatar.model{background-color:var(--color-green);color:#fff}.text-box{padding:.75rem;border-radius:1rem;font-size:.875rem;line-height:1.5;box-shadow:var(--shadow-sm);white-space:pre-wrap}.text-box.user{background-color:#fff;border:1px solid var(--color-gray-100);color:var(--color-gray-800);border-top-right-radius:0}.text-box.model{background-color:#fff;border:1px solid rgba(212,175,55,.2);color:var(--color-gray-800);border-top-left-radius:0}.text-box.error{color:#dc2626;background-color:#fef2f2}.chat-input-area{padding:1rem;background-color:#fff;border-top:1px solid var(--color-gray-100)}.input-wrapper{position:relative;display:flex}.chat-input{width:100%;padding:.75rem 3rem .75rem .75rem;border-radius:var(--radius-lg);border:1px solid var(--color-gray-300);outline:none;font-size:1rem}.chat-input:focus{border-color:var(--color-gold);box-shadow:0 0 0 1px var(--color-gold)}.send-btn{position:absolute;right:.5rem;top:.35rem;background-color:var(--color-red);color:#fff;padding:.4rem;border-radius:.375rem;transition:background-color .2s}.send-btn:hover{background-color:var(--color-red-dark)}.send-btn:disabled{opacity:.5;cursor:not-allowed}.footer{background-color:var(--color-gray-900);color:#d1d5db;padding:3rem 0;margin-top:3rem;border-top:4px solid var(--color-gold);position:relative;overflow:hidden}.footer h4{color:var(--color-gold);font-weight:700;margin-bottom:1.5rem;border-bottom:1px solid #374151;padding-bottom:.5rem;display:inline-block}.footer-link{display:flex;align-items:center;gap:.5rem;transition:color .2s;color:#9ca3af;margin-bottom:.75rem}.footer-link:hover{color:var(--color-gold)}.footer-contact{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem;color:#9ca3af;font-size:.875rem}.icon-circle{background-color:#1f2937;padding:.5rem;border-radius:50%;border:1px solid #374151;display:flex;align-items:center;justify-content:center}