.about-container{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);color:white;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.about-header{padding:40px 20px 20px;text-align:center;position:relative}.back-btn{position:absolute;left:20px;top:40px;color:white;text-decoration:none;padding:8px 16px;border-radius:8px;background:rgba(255,255,255,.1);transition:background .2s ease;z-index:1000;cursor:pointer;display:inline-block;font-weight:500;pointer-events:auto}.back-btn:hover{background:rgba(255,255,255,.2)}.about-header h1{font-size:2.5rem;margin:0;font-weight:700;background:linear-gradient(45deg,#ffd700,#ffb347);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.about-content{max-width:1200px;margin:0 auto;padding:0 20px 40px}.about-nav{display:flex;justify-content:center;margin-bottom:40px;background:rgba(255,255,255,.1);border-radius:12px;padding:8px;backdrop-filter:blur(10px);flex-wrap:wrap;gap:4px}.nav-tab{background:none;border:none;color:white;padding:12px 24px;border-radius:8px;cursor:pointer;transition:all .3s ease;font-size:16px;font-weight:500;white-space:nowrap}.nav-tab:hover{background:rgba(255,255,255,.1)}.nav-tab.active{background:rgba(255,255,255,.2);font-weight:600}.about-main{background:rgba(255,255,255,.95);border-radius:16px;padding:40px;color:#333;box-shadow:0 20px 40px rgba(0,0,0,.1);backdrop-filter:blur(10px)}.content-section h2{color:#2563eb;font-size:2rem;margin-bottom:24px;font-weight:700}.content-section h3{color:#1e40af;font-size:1.25rem;margin:24px 0 12px;font-weight:600}.content-section h4{color:#3730a3;font-size:1.1rem;margin:16px 0 8px;font-weight:600}.content-text{line-height:1.7;font-size:16px}.content-text p{margin-bottom:16px;color:#4b5563}.content-text ol,.content-text ul{margin:16px 0;padding-left:24px}.content-text li{margin-bottom:8px;color:#4b5563}.content-text li strong{color:#1f2937}.content-text a{color:#2563eb;text-decoration:none;font-weight:500}.content-text a:hover{text-decoration:underline}.update-date{margin-top:32px;padding-top:16px;border-top:1px solid #e5e7eb;color:#6b7280;font-size:14px;font-style:italic}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;margin:24px 0}.feature-item{background:#f8fafc;padding:24px;border-radius:12px;border-left:4px solid #2563eb}.feature-item h4{margin:0 0 12px;color:#1e40af;font-size:1.1rem}.feature-item p{margin:0;color:#4b5563;font-size:14px}.about-main .feature-item{color:#333!important}.contact-info{display:grid;gap:32px}.contact-item{background:#f8fafc;padding:24px;border-radius:12px;border-left:4px solid #10b981}.contact-item h3{margin:0 0 16px;color:#059669}.email-link{display:inline-block;background:#2563eb;color:white!important;padding:12px 24px;border-radius:8px;text-decoration:none;font-weight:600;margin:8px 0;transition:background .2s ease}.email-link:hover{background:#1d4ed8;text-decoration:none}.email-desc{font-size:14px;color:#6b7280;margin-top:8px}.email-template{background:#f1f5f9;padding:16px;border-radius:8px;margin:16px 0;border-left:3px solid #3b82f6}.email-template p{margin:8px 0;font-size:14px}.email-template ul{margin:8px 0}.email-template li{font-size:14px}@media (max-width:768px){.about-header{padding:20px 16px 16px}.back-btn{left:16px;top:20px;padding:6px 12px;font-size:14px}.about-header h1{font-size:2rem}.about-content{padding:0 16px 20px}.about-nav{padding:6px}.nav-tab{padding:10px 16px;font-size:14px}.about-main{padding:24px 20px}.content-section h2{font-size:1.5rem}.feature-grid{grid-template-columns:1fr;gap:16px}.contact-item,.feature-item{padding:16px}}@media (max-width:480px){.about-nav{flex-direction:column;gap:2px}.nav-tab{width:100%;text-align:center}.about-main{padding:20px 16px}.content-text{font-size:15px}}