:root{--primary-color: #6366f1;--primary-dark: #4f46e5;--primary-light: #818cf8;--secondary-color: #8b5cf6;--accent-color: #ec4899;--text-primary: #1e293b;--text-secondary: #64748b;--text-light: #94a3b8;--bg-primary: #ffffff;--bg-secondary: #f8fafc;--bg-card: #ffffff;--border-color: #e2e8f0;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;line-height:1.6;font-weight:400;--transition-base: all .3s cubic-bezier(.4, 0, .2, 1);--transition-fast: all .15s cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:var(--bg-secondary);color:var(--text-primary);font-size:16px;overflow-x:hidden}#app{width:100%}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;color:var(--text-primary)}a{color:var(--primary-color);text-decoration:none;transition:var(--transition-fast)}a:hover{color:var(--primary-dark)}button{font-family:inherit;cursor:pointer;border:none;outline:none;transition:var(--transition-base)}.container{max-width:1200px;margin:0 auto;padding:0 20px}.section{padding:80px 0;position:relative}.section-title{font-size:2.5rem;text-align:center;margin-bottom:1rem;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.section-subtitle{text-align:center;color:var(--text-secondary);font-size:1.1rem;margin-bottom:3rem;max-width:700px;margin-left:auto;margin-right:auto}.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:#fffc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid rgba(226,232,240,.8);transition:var(--transition-base)}.navbar.scrolled{background:#fffffff2;box-shadow:var(--shadow)}.nav-container{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center;height:70px}.nav-brand{font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-links{display:flex;gap:2rem;align-items:center}.nav-links a{color:var(--text-secondary);font-weight:500;cursor:pointer;position:relative;padding:.5rem 0}.nav-links a:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:linear-gradient(90deg,var(--primary-color),var(--secondary-color));transition:width .3s ease}.nav-links a:hover,.nav-links a.active{color:var(--primary-color)}.nav-links a.active:after{width:100%}.mobile-menu-btn{display:none;flex-direction:column;gap:5px;background:none;padding:10px}.mobile-menu-btn span{width:25px;height:3px;background:var(--text-primary);border-radius:3px;transition:var(--transition-base)}.hero-section{min-height:100vh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;background:linear-gradient(135deg,#667eea,#764ba2);padding-top:70px}.hero-bg-decoration{position:absolute;inset:0;background:radial-gradient(circle at 20% 50%,rgba(99,102,241,.3) 0%,transparent 50%),radial-gradient(circle at 80% 80%,rgba(139,92,246,.3) 0%,transparent 50%);animation:float 20s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-20px)}}.hero-content{position:relative;z-index:1;text-align:center;color:#fff;padding:40px 20px;max-width:900px;margin:0 auto}.hero-badge{display:inline-block;background:#fff3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:.5rem 1.5rem;border-radius:50px;font-size:.9rem;font-weight:600;margin-bottom:2rem;border:1px solid rgba(255,255,255,.3)}.hero-title{font-size:3.5rem;font-weight:800;margin-bottom:1rem;line-height:1.2;text-shadow:0 2px 10px rgba(0,0,0,.2)}.hero-subtitle{font-size:1.5rem;margin-bottom:2rem;opacity:.95;font-weight:300}.hero-info{display:flex;flex-wrap:wrap;gap:2rem;justify-content:center;margin:2rem 0;font-size:1rem}.info-item{display:flex;align-items:center;gap:.5rem;background:#ffffff26;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:.75rem 1.5rem;border-radius:50px;border:1px solid rgba(255,255,255,.2)}.info-item .icon{width:20px;height:20px}.hero-buttons{display:flex;gap:1rem;justify-content:center;margin-top:3rem;flex-wrap:wrap}.btn{padding:1rem 2rem;font-size:1.1rem;font-weight:600;border-radius:50px;transition:var(--transition-base);display:inline-flex;align-items:center;gap:.5rem}.btn-primary{background:#fff;color:var(--primary-color);box-shadow:var(--shadow-lg)}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-xl)}.btn-secondary{background:#fff3;color:#fff;border:2px solid white;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.btn-secondary:hover{background:#fff;color:var(--primary-color);transform:translateY(-2px)}.about-section{background:var(--bg-primary)}.content-card{background:var(--bg-card);padding:3rem;border-radius:20px;box-shadow:var(--shadow);border:1px solid var(--border-color)}.lead-text{font-size:1.25rem;color:var(--text-secondary);margin-bottom:1.5rem;font-weight:500}.content-card p{color:var(--text-secondary);margin-bottom:1rem;line-height:1.8}.highlight-box{background:linear-gradient(135deg,#6366f11a,#8b5cf61a);border-left:4px solid var(--primary-color);padding:2rem;border-radius:10px;margin-top:2rem}.highlight-box h3{color:var(--primary-color);margin-bottom:1rem;font-size:1.3rem}.topics-section{background:var(--bg-secondary)}.topics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}.topic-card{background:var(--bg-card);padding:2rem;border-radius:15px;box-shadow:var(--shadow);border:1px solid var(--border-color);transition:var(--transition-base);display:flex;gap:1.5rem;align-items:start}.topic-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.topic-number{width:40px;height:40px;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem;flex-shrink:0}.topic-content h3{font-size:1rem;color:var(--text-primary);line-height:1.6;font-weight:600}.dates-section{background:var(--bg-primary)}.dates-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:2rem}.date-card{background:var(--bg-card);padding:2rem;border-radius:15px;box-shadow:var(--shadow);border:1px solid var(--border-color);display:flex;flex-direction:column;align-items:center;text-align:center;transition:var(--transition-base)}.date-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.date-icon{width:60px;height:60px;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));border-radius:15px;display:flex;align-items:center;justify-content:center;margin-bottom:1rem}.date-icon svg{width:30px;height:30px;color:#fff}.date-content h3{font-size:1.1rem;margin-bottom:.5rem;color:var(--text-primary)}.date-value{font-size:1.3rem;font-weight:700;color:var(--primary-color)}.info-note{background:#6366f11a;padding:1rem 1.5rem;border-radius:10px;display:flex;align-items:center;gap:1rem;color:var(--primary-color);font-weight:500}.info-note .icon{width:24px;height:24px;flex-shrink:0}.cfp-section{background:var(--bg-secondary)}.cfp-content{display:flex;flex-direction:column;gap:2rem}.cfp-card{background:var(--bg-card);padding:2rem;border-radius:15px;box-shadow:var(--shadow);border:1px solid var(--border-color);transition:var(--transition-base)}.cfp-card:hover{box-shadow:var(--shadow-lg)}.main-cfp{background:linear-gradient(135deg,#6366f10d,#8b5cf60d);border:2px solid var(--primary-color)}.cfp-card h3{font-size:1.5rem;margin-bottom:1.5rem;color:var(--primary-color)}.cfp-details{display:flex;flex-direction:column;gap:1rem}.cfp-item{display:flex;gap:1rem;padding:1rem;background:var(--bg-primary);border-radius:10px}.cfp-item .label{font-weight:700;color:var(--text-primary);min-width:100px}.cfp-item .value{color:var(--text-secondary);flex:1}.cfp-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}.card-icon{font-size:3rem;margin-bottom:1rem}.cfp-grid .cfp-card h3{font-size:1.2rem;color:var(--text-primary);margin-bottom:1rem}.cfp-grid .cfp-card p{color:var(--text-secondary);line-height:1.6}.organizers-section{background:var(--bg-primary)}.organizers-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:2rem}.organizer-card{background:var(--bg-card);padding:2rem;border-radius:15px;box-shadow:var(--shadow);border:1px solid var(--border-color);transition:var(--transition-base);display:flex;flex-direction:column;align-items:center;text-align:center}.organizer-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.organizer-avatar{width:100px;height:100px;margin-bottom:1.5rem}.avatar-placeholder{width:100%;height:100%;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2rem;font-weight:700}.organizer-photo{width:100%;height:100%;object-fit:cover;border-radius:50%;border:3px solid var(--primary-color)}.organizer-info h3{font-size:1.3rem;margin-bottom:.5rem;color:var(--text-primary)}.organizer-info .affiliation{color:var(--primary-color);font-weight:600;margin-bottom:.5rem;font-size:.95rem}.organizer-info .role{color:var(--text-secondary);font-size:.9rem;margin-bottom:1rem;font-style:italic}.organizer-info .expertise{color:var(--text-secondary);font-size:.9rem;margin-bottom:1rem;line-height:1.6;text-align:left}.email-link{display:inline-flex;align-items:center;gap:.5rem;color:var(--primary-color);font-size:.9rem;padding:.5rem 1rem;background:#6366f11a;border-radius:50px;transition:var(--transition-base)}.email-link:hover{background:var(--primary-color);color:#fff}.email-link .icon{width:16px;height:16px}.footer{background:linear-gradient(135deg,#1e293b,#334155);color:#fff;padding:3rem 0 1.5rem}.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:2rem}.footer-section h3{color:#fff;margin-bottom:1rem;font-size:1.3rem}.footer-section h4{color:#fff;margin-bottom:1rem;font-size:1.1rem}.footer-section p{color:#ffffffb3;line-height:1.8;margin-bottom:.5rem}.footer-tagline{font-style:italic;margin-top:.5rem}.footer-section ul{list-style:none}.footer-section ul li{margin-bottom:.5rem}.footer-section ul li a{color:#ffffffb3;cursor:pointer;transition:var(--transition-fast)}.footer-section ul li a:hover{color:#fff;padding-left:5px}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:2rem;text-align:center;color:#fff9}.footer-bottom p{margin:.5rem 0}.footer-bottom a{color:var(--primary-light)}.footer-bottom a:hover{color:#fff}@media(max-width:768px){.nav-links{position:fixed;top:70px;left:0;right:0;background:#fff;flex-direction:column;padding:2rem;box-shadow:var(--shadow-lg);transform:translateY(-100%);opacity:0;pointer-events:none;transition:var(--transition-base);gap:1rem}.nav-links.mobile-open{transform:translateY(0);opacity:1;pointer-events:all}.mobile-menu-btn{display:flex}.hero-title{font-size:2.5rem}.hero-subtitle{font-size:1.2rem}.hero-info{flex-direction:column;align-items:stretch;gap:1rem}.section{padding:60px 0}.section-title{font-size:2rem}.topics-grid,.dates-container,.cfp-grid,.organizers-grid{grid-template-columns:1fr}.content-card{padding:2rem 1.5rem}.hero-buttons{flex-direction:column;align-items:stretch}}@media(max-width:480px){.hero-title{font-size:2rem}.section-title{font-size:1.8rem}.btn{padding:.875rem 1.5rem;font-size:1rem}}