:root{--primary-color: #0066cc;--secondary-color: #1a1a2e;--accent-color: #00a0e9;--text-dark: #1a1a2e;--text-light: #666666;--bg-light: #f5f7fa;--bg-dark: #0f0f1e;--white: #ffffff;--shadow: 0 2px 20px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 40px rgba(0, 0, 0, .15)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Helvetica,Arial,sans-serif;line-height:1.6;color:var(--text-dark);overflow-x:hidden}.app{min-height:100vh}.container{max-width:1200px;margin:0 auto;padding:0 20px}.navbar{position:fixed;top:0;width:100%;background:#1a1a2ef2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 2px 20px #0066cc4d;z-index:1000;transition:all .3s ease;border-bottom:1px solid rgba(0,102,204,.2)}.nav-content{display:flex;justify-content:space-between;align-items:center;padding:1rem 0}.logo{display:flex;align-items:center;gap:1rem}.logo-icon{width:50px;height:50px;filter:drop-shadow(0 2px 8px rgba(0,102,204,.4))}.logo-text-container{display:flex;flex-direction:column;gap:.2rem}.logo-text{font-size:1.8rem;font-weight:700;background:linear-gradient(135deg,#06c,#00a0e9);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:3px}.logo-subtitle{font-size:.875rem;color:#00a0e9;letter-spacing:1px;font-weight:500}.nav-menu{display:flex;list-style:none;gap:2rem}.nav-menu a{text-decoration:none;color:#fff;font-weight:500;transition:all .3s ease;position:relative;padding:.5rem 0}.nav-menu a:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:linear-gradient(90deg,#06c,#00a0e9);transition:width .3s ease}.nav-menu a:hover:after,.nav-menu a.active:after{width:100%}.nav-menu a:hover,.nav-menu a.active{color:#00a0e9}.hero{position:relative;height:100vh;background:linear-gradient(135deg,#1a1a2e,#0f0f1e,#000);display:flex;align-items:center;justify-content:center;color:var(--white);overflow:hidden}.hero:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 50%,rgba(0,102,204,.1) 0%,transparent 50%),radial-gradient(circle at 80% 80%,rgba(0,160,233,.1) 0%,transparent 50%);animation:pulse 8s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.hero-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><defs><linearGradient id="grad" x1="0%" y1="0%" x2="100%" y2="100%"><stop offset="0%" style="stop-color:%230066cc;stop-opacity:0.1" /><stop offset="100%" style="stop-color:%2300a0e9;stop-opacity:0.05" /></linearGradient></defs><path d="M0,100 Q300,200 600,100 T1200,100 L1200,600 L0,600 Z" fill="url(%23grad)"/><circle cx="100" cy="100" r="50" fill="%230066cc" opacity="0.05"/><circle cx="1100" cy="500" r="80" fill="%2300a0e9" opacity="0.05"/></svg>') no-repeat center;background-size:cover;opacity:.8}.hero-content{position:relative;z-index:1;text-align:center;animation:fadeInUp 1s ease}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.hero-title{font-size:3.5rem;font-weight:700;margin-bottom:1rem;letter-spacing:2px;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.hero-subtitle{font-size:1.8rem;margin-bottom:1.5rem;font-weight:300}.hero-description{font-size:1.2rem;margin-bottom:2.5rem;opacity:.95}.cta-button{padding:1rem 3rem;font-size:1.1rem;font-weight:600;color:var(--primary-color);background:var(--white);border:none;border-radius:50px;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #0003}.cta-button:hover{transform:translateY(-2px);box-shadow:0 6px 20px #0000004d}section{padding:6rem 0}.section-title{font-size:2.5rem;text-align:center;margin-bottom:3rem;color:var(--text-dark);position:relative;padding-bottom:1rem}.section-title:after{content:"";position:absolute;bottom:0;left:50%;transform:translate(-50%);width:80px;height:4px;background:linear-gradient(90deg,var(--primary-color),var(--accent-color));border-radius:2px}.about{background:var(--bg-light)}.about-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.about-card{background:var(--white);padding:2.5rem;border-radius:15px;text-align:center;box-shadow:var(--shadow);transition:all .3s ease}.about-card:hover{transform:translateY(-10px);box-shadow:var(--shadow-lg)}.card-icon{font-size:3.5rem;margin-bottom:1.5rem}.about-card h3{font-size:1.5rem;margin-bottom:1rem;color:var(--primary-color)}.about-card p{color:var(--text-light);line-height:1.8}.products{background:var(--white)}.products-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(400px,1fr));gap:2.5rem}.product-card{background:var(--bg-light);padding:2.5rem;border-radius:15px;box-shadow:var(--shadow);transition:all .3s ease;position:relative}.product-card.featured{background:linear-gradient(135deg,#f5f7fa,#e8f0fe);border:2px solid var(--primary-color)}.product-badge{position:absolute;top:1rem;right:1rem;background:var(--primary-color);color:var(--white);padding:.4rem 1rem;border-radius:20px;font-size:.875rem;font-weight:600}.product-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.product-card h3{font-size:1.8rem;margin-bottom:1rem;color:var(--primary-color)}.product-description{color:var(--text-light);margin-bottom:1.5rem;line-height:1.8}.product-features{list-style:none;margin-bottom:1.5rem}.product-features li{padding:.6rem 0;color:var(--text-dark);border-bottom:1px solid rgba(0,0,0,.1)}.product-features li:last-child{border-bottom:none}.product-tech{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.5rem}.tech-tag{background:var(--white);color:var(--primary-color);padding:.4rem 1rem;border-radius:20px;font-size:.875rem;font-weight:500;border:1px solid var(--primary-color)}.contact{background:var(--bg-light)}.contact-content{display:grid;grid-template-columns:1fr 1fr;gap:3rem}.contact-info{display:flex;flex-direction:column;gap:1.5rem}.contact-item{display:flex;align-items:center;gap:1.5rem;background:var(--white);padding:1.5rem;border-radius:10px;box-shadow:var(--shadow);transition:all .3s ease}.contact-item:hover{transform:translate(5px);box-shadow:var(--shadow-lg)}.contact-icon{font-size:2.5rem;min-width:60px;text-align:center}.contact-details h4{color:var(--primary-color);margin-bottom:.3rem;font-size:1.1rem}.contact-details p{color:var(--text-dark);font-size:1.1rem;font-weight:500}.contact-form{background:var(--white);padding:2.5rem;border-radius:15px;box-shadow:var(--shadow)}.contact-form h3{color:var(--primary-color);margin-bottom:1.5rem;font-size:1.8rem}.contact-form form{display:flex;flex-direction:column;gap:1.2rem}.contact-form input,.contact-form textarea{padding:1rem;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem;font-family:inherit;transition:all .3s ease}.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #0066cc1a}.contact-form textarea{resize:vertical;min-height:120px}.contact-form button{padding:1rem;background:var(--primary-color);color:var(--white);border:none;border-radius:8px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.contact-form button:hover{background:var(--secondary-color);transform:translateY(-2px);box-shadow:0 4px 12px #0066cc4d}.contact-form button:disabled{background:#ccc;cursor:not-allowed;transform:none}.submit-message{padding:1rem;border-radius:8px;text-align:center;font-weight:500;animation:slideIn .3s ease}.submit-message.success{background:#e0ffe0;color:#2d7a2d;border:1px solid #51cf66}.submit-message.error{background:#ffe0e0;color:#c92a2a;border:1px solid #ff6b6b}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.footer{background:linear-gradient(180deg,#1a1a2e,#0f0f1e);color:var(--white);padding:3rem 0 1.5rem;border-top:1px solid rgba(0,102,204,.3)}.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:2rem;padding-bottom:2rem;border-bottom:1px solid rgba(255,255,255,.1)}.footer-section h3{color:#00a0e9;margin-bottom:1rem;font-size:1.2rem}.footer-section h4{color:#06c;margin-bottom:.8rem;font-size:1rem}.footer-section p{margin:.5rem 0;opacity:.9;font-size:.95rem}.footer-section a{color:#fffc;text-decoration:none;transition:all .3s ease}.footer-section a:hover{color:#00a0e9;padding-left:5px}.footer-bottom{text-align:center;padding-top:1.5rem;position:relative}.footer-bottom p{margin:.5rem 0;opacity:.8;font-size:.9rem}.admin-link-footer{position:absolute;bottom:1rem;right:2rem;color:#fff6;text-decoration:none;font-size:.8rem;transition:all .3s ease;padding:.3rem .8rem;border-radius:4px}.admin-link-footer:hover{color:#ffffffb3;background:#ffffff0d}@media (max-width: 968px){.nav-menu{gap:1rem}.hero-title{font-size:2.5rem}.hero-subtitle{font-size:1.4rem}.products-grid,.contact-content{grid-template-columns:1fr}}@media (max-width: 640px){.nav-content{flex-direction:column;gap:1rem}.nav-menu{flex-wrap:wrap;justify-content:center;gap:.8rem}.hero-title{font-size:2rem}.hero-subtitle{font-size:1.2rem}.hero-description{font-size:1rem}.section-title{font-size:2rem}.about-content,.products-grid{grid-template-columns:1fr}}.admin{min-height:100vh;background:#f5f7fa;padding:2rem}.login-page{min-height:100vh;background:linear-gradient(135deg,#1a1a2e,#0f0f1e,#000);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.login-page:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 50%,rgba(0,102,204,.1) 0%,transparent 50%),radial-gradient(circle at 80% 80%,rgba(0,160,233,.1) 0%,transparent 50%);animation:pulse 8s ease-in-out infinite}.login-container{position:relative;z-index:1;background:#fffffffa;padding:3rem;border-radius:20px;box-shadow:0 20px 60px #0000004d;width:100%;max-width:420px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.login-header{text-align:center;margin-bottom:2rem}.login-logo{width:80px;height:80px;margin-bottom:1.5rem;filter:drop-shadow(0 4px 12px rgba(0,102,204,.3))}.login-header h1{font-size:1.8rem;color:#1a1a2e;margin-bottom:.5rem}.login-header p{color:#666;font-size:1rem}.login-form{display:flex;flex-direction:column;gap:1.5rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-weight:600;color:#1a1a2e;font-size:.95rem}.form-group input{padding:.9rem 1.2rem;border:2px solid #e0e0e0;border-radius:10px;font-size:1rem;transition:all .3s ease;background:#f8f9fa}.form-group input:focus{outline:none;border-color:#06c;background:#fff;box-shadow:0 0 0 3px #0066cc1a}.login-error{background:#ffe0e0;color:#c92a2a;padding:.8rem 1rem;border-radius:8px;font-size:.9rem;border:1px solid #ff6b6b;text-align:center}.login-btn{padding:1rem;background:linear-gradient(135deg,#06c,#00a0e9);color:#fff;border:none;border-radius:10px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s ease;margin-top:.5rem}.login-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #06c6}.login-btn:disabled{opacity:.6;cursor:not-allowed}.login-footer{text-align:center;margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid #e0e0e0}.login-footer a{color:#06c;text-decoration:none;font-size:.9rem;transition:all .3s}.login-footer a:hover{color:#00a0e9;text-decoration:underline}.admin-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;background:#fff;padding:1.5rem 2rem;border-radius:12px;box-shadow:0 2px 8px #00000014}.admin-header h1{font-size:1.8rem;color:#06c;margin:0}.admin-nav{display:flex;align-items:center;gap:1rem}.admin-nav .nav-link{padding:.6rem 1.5rem;background:#06c;color:#fff;text-decoration:none;border-radius:6px;transition:all .3s}.admin-nav .nav-link:hover{background:#0052a3;transform:translateY(-2px)}.admin-user{color:#666;font-size:.9rem;padding:.6rem 1rem;background:#f0f0f0;border-radius:6px}.logout-btn{padding:.6rem 1.2rem;background:#ff6b6b;color:#fff;border:none;border-radius:6px;cursor:pointer;transition:all .3s;font-size:.9rem;font-weight:500}.logout-btn:hover{background:#ff5252;transform:translateY(-2px)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.5rem;margin-bottom:2rem}.stat-card{background:#fff;padding:1.5rem;border-radius:12px;display:flex;align-items:center;gap:1.5rem;box-shadow:0 2px 8px #00000014;transition:all .3s}.stat-card:hover{transform:translateY(-4px);box-shadow:0 4px 16px #0000001f}.stat-card.total{border-left:4px solid #0066cc}.stat-card.unread{border-left:4px solid #ff6b6b}.stat-card.read{border-left:4px solid #ffa500}.stat-card.replied{border-left:4px solid #51cf66}.stat-icon{font-size:2.5rem}.stat-value{font-size:2rem;font-weight:700;color:#1a1a1a}.stat-label{color:#666;font-size:.9rem}.filters{display:flex;gap:1rem;margin-bottom:1.5rem;background:#fff;padding:1rem;border-radius:12px;box-shadow:0 2px 8px #00000014}.filter-btn{padding:.6rem 1.5rem;border:2px solid #e0e0e0;background:#fff;border-radius:8px;cursor:pointer;transition:all .3s;font-weight:500;color:#666}.filter-btn:hover{border-color:#06c;color:#06c}.filter-btn.active{background:#06c;color:#fff;border-color:#06c}.messages-container{display:grid;grid-template-columns:1fr 1.2fr;gap:1.5rem;min-height:600px}.messages-list{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 2px 8px #00000014;overflow-y:auto;max-height:calc(100vh - 400px)}.messages-list h2{margin-bottom:1.5rem;color:#1a1a1a;font-size:1.3rem}.empty-state{text-align:center;padding:3rem;color:#999;font-size:1.1rem}.message-item{padding:1.2rem;border:2px solid #f0f0f0;border-radius:8px;margin-bottom:1rem;cursor:pointer;transition:all .3s}.message-item:hover{border-color:#06c;background:#f8f9fa}.message-item.selected{border-color:#06c;background:#e8f4fd}.message-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}.message-info{display:flex;align-items:center;gap:1rem}.message-name{font-weight:600;color:#1a1a1a;font-size:1rem}.message-status{padding:.3rem .8rem;border-radius:12px;font-size:.75rem;font-weight:600}.status-unread{background:#ffe0e0;color:#ff6b6b}.status-read{background:#fff3e0;color:orange}.status-replied{background:#e0ffe0;color:#51cf66}.message-date{font-size:.85rem;color:#999}.message-preview{color:#666;font-size:.9rem;line-height:1.4}.pagination{display:flex;justify-content:center;align-items:center;gap:1rem;margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid #e0e0e0}.pagination button{padding:.5rem 1.2rem;background:#06c;color:#fff;border:none;border-radius:6px;cursor:pointer;transition:all .3s}.pagination button:hover:not(:disabled){background:#0052a3}.pagination button:disabled{background:#ccc;cursor:not-allowed}.page-info{color:#666;font-size:.9rem}.message-detail{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 2px 8px #00000014}.detail-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;padding-bottom:1rem;border-bottom:2px solid #f0f0f0}.detail-header h2{color:#1a1a1a;font-size:1.3rem;margin:0}.detail-actions{display:flex;gap:1rem}.status-select{padding:.5rem 1rem;border:2px solid #e0e0e0;border-radius:6px;background:#fff;cursor:pointer;font-size:.9rem;transition:all .3s}.status-select:focus{outline:none;border-color:#06c}.delete-btn{padding:.5rem 1.2rem;background:#ff6b6b;color:#fff;border:none;border-radius:6px;cursor:pointer;transition:all .3s;font-weight:500}.delete-btn:hover{background:#ff5252;transform:translateY(-2px)}.detail-content{display:flex;flex-direction:column;gap:1.5rem}.detail-field label{display:block;font-weight:600;color:#666;margin-bottom:.5rem;font-size:.9rem}.field-value{padding:.8rem 1rem;background:#f8f9fa;border-radius:6px;color:#1a1a1a;font-size:1rem}.field-value.content{min-height:120px;line-height:1.6;white-space:pre-wrap}.detail-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;min-height:400px;color:#999}.empty-icon{font-size:4rem;margin-bottom:1rem}.detail-empty p{font-size:1.1rem}@media (max-width: 968px){.messages-container{grid-template-columns:1fr}.message-detail{display:none}.messages-list{max-height:none}}@media (max-width: 640px){.admin{padding:1rem}.admin-header{flex-direction:column;gap:1rem;text-align:center}.stats-grid{grid-template-columns:1fr}.filters{flex-wrap:wrap}}:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh}