:root{--primary-color:#0d2b45;--secondary-color:#1a5276;--accent-color:#7fb3d5;--background-light:#f8f9fa;--background-white:#fff;--text-primary:#333;--text-secondary:#666;--text-light:#fff;--border-color:#e0e0e0;--font-family-sans:"Inter", "Noto Sans TC", sans-serif;--shadow-sm:0 2px 4px #0000000d;--shadow-md:0 4px 12px #0000001a;--shadow-lg:0 10px 30px #00000026;--transition-fast:.2s ease;--transition-normal:.3s ease}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-family-sans);color:var(--text-primary);background-color:var(--background-light);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6}h1,h2,h3,h4,h5,h6{color:var(--primary-color);margin-bottom:1rem;font-weight:700;line-height:1.2}a{color:inherit;text-decoration:none}ul{list-style:none}img{max-width:100%;display:block}.container{max-width:1200px;margin:0 auto;padding:0 2rem}.section{padding:5rem 0}.section-title{text-align:center;margin-bottom:3rem;padding-bottom:1rem;font-size:2.5rem;position:relative}.section-title:after{content:"";background-color:var(--secondary-color);width:60px;height:3px;position:absolute;bottom:0;left:50%;transform:translate(-50%)}.text-center{text-align:center}.mt-2{margin-top:1rem}.mb-2{margin-bottom:1rem}.mt-4{margin-top:2rem}.mb-4{margin-bottom:2rem}.navbar{-webkit-backdrop-filter:blur(10px);height:80px;box-shadow:var(--shadow-sm);z-index:1000;transition:all var(--transition-normal);background-color:#fffffff2;position:fixed;top:0;left:0;right:0}.navbar .container{justify-content:space-between;align-items:center;height:100%;display:flex}.nav-brand{align-items:center;gap:10px;display:flex}.text-logo{color:var(--primary-color);letter-spacing:-1px;font-size:1.8rem;font-weight:800}.text-logo-dot{color:var(--secondary-color)}.nav-links{align-items:center;gap:1rem;display:flex}.nav-links a{color:var(--text-primary);transition:color var(--transition-fast);font-size:.95rem;font-weight:500;position:relative}.nav-links a:after{content:"";background-color:var(--secondary-color);width:0;height:2px;transition:width var(--transition-fast);position:absolute;bottom:-4px;left:0}.nav-links a:hover{color:var(--secondary-color)}.nav-links a:hover:after{width:100%}.hero{background:linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);min-height:100vh;color:var(--text-light);text-align:center;justify-content:center;align-items:center;padding-top:80px;display:flex;position:relative;overflow:hidden}.hero-content{z-index:2;max-width:800px;padding:0 2rem;animation:1s ease-out forwards fadeIn;position:relative}.hero h1{color:var(--text-light);letter-spacing:-1px;margin-bottom:1.5rem;font-size:4rem}.hero p{opacity:.9;margin-bottom:2.5rem;font-size:1.25rem;font-weight:300}.btn{transition:all var(--transition-normal);cursor:pointer;border:none;border-radius:4px;padding:1rem 2.5rem;font-size:1.1rem;font-weight:600;display:inline-block}.btn-primary{background-color:var(--text-light);color:var(--primary-color);box-shadow:var(--shadow-md)}.btn-primary:hover{box-shadow:var(--shadow-lg);background-color:var(--accent-color);color:var(--text-light);transform:translateY(-2px)}.feature-grid{grid-template-columns:repeat(3,1fr);gap:2rem;margin-top:3rem;display:grid}.feature-card{background:var(--background-white);box-shadow:var(--shadow-sm);transition:all var(--transition-normal);border:1px solid var(--border-color);border-radius:8px;padding:2.5rem}.feature-card:hover{box-shadow:var(--shadow-md);border-color:var(--accent-color);transform:translateY(-5px)}.feature-icon{width:50px;height:50px;color:var(--secondary-color);background-color:#1a52761a;border-radius:50%;justify-content:center;align-items:center;margin-bottom:1.5rem;font-size:1.5rem;display:flex}.about-visual{flex-direction:column;gap:1rem;display:flex}.about-visual-box{background-color:var(--background-white);box-shadow:var(--shadow-sm);border-left:4px solid var(--secondary-color);transition:all var(--transition-normal);border-radius:8px;padding:1.5rem}.about-visual-box:hover{box-shadow:var(--shadow-md);transform:translate(10px)}.about-visual-box h4{color:var(--primary-color);margin-bottom:.25rem;font-size:1.2rem}.about-visual-box.outline{border:1px solid var(--border-color);border-left:4px solid var(--primary-color);background-color:#0000}.about-visual-box.dark{background-color:var(--primary-color);color:var(--text-light);border-left:4px solid var(--accent-color)}.about-visual-box.dark h4{color:var(--text-light)}.stats{background-color:var(--primary-color);color:var(--text-light);padding:4rem 0}.stats-grid{text-align:center;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;display:grid}.stat-item h3{color:var(--text-light);margin-bottom:.5rem;font-size:3rem}.stat-item p{opacity:.8;font-size:1.1rem}.footer{color:#ffffffb3;background-color:#081a29;padding:4rem 0 2rem}.footer-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:3rem;margin-bottom:3rem;display:grid}.footer-col h4{color:var(--text-light);margin-bottom:1.5rem;font-size:1.2rem}.footer-col ul li{margin-bottom:.75rem}.footer-col ul li a{transition:color var(--transition-fast)}.footer-col ul li a:hover{color:var(--text-light)}.footer-bottom{text-align:center;border-top:1px solid #ffffff1a;padding-top:2rem;font-size:.9rem}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (width<=900px){.feature-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}}@media (width<=768px){.hero h1{font-size:2.5rem}.nav-links{display:none}}.app-container{flex-direction:column;min-height:100vh;display:flex}.main-content{flex:1;padding-top:80px}.page-wrapper{animation:.5s ease-out forwards fadeIn}.page-header{background:linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);color:var(--text-light);text-align:center;padding:6rem 0 4rem}.page-header h1{color:var(--text-light);margin-bottom:1rem;font-size:3rem}.page-header p{opacity:.9;font-size:1.2rem}.nav-links a.active{color:var(--secondary-color)}.nav-links a.active:after{width:100%}.lang-switcher{border:1px solid var(--border-color);background-color:var(--background-white);color:var(--text-primary);cursor:pointer;border-radius:4px;outline:none;margin-left:1rem;padding:.4rem .8rem;font-family:inherit;font-size:.9rem;transition:border-color .2s}.lang-switcher:hover{border-color:var(--primary-color)}.brand-text{color:var(--primary-color);flex-direction:column;justify-content:center;display:flex}.brand-title{letter-spacing:2px;font-size:1.6rem;font-weight:700;line-height:1.2}.brand-subtitle{letter-spacing:1px;color:var(--secondary-color);text-transform:uppercase;font-size:.8rem;font-weight:400}.lang-dropdown{margin-left:1.5rem;display:inline-block;position:relative}.lang-btn{color:var(--text-primary);cursor:pointer;background:0 0;border:none;border-radius:4px;align-items:center;gap:6px;padding:.5rem;font-size:.95rem;font-weight:500;transition:all .3s;display:flex}.lang-btn:hover{background-color:#0000000d}.lang-menu{-webkit-backdrop-filter:blur(12px);opacity:0;visibility:hidden;z-index:1000;background:#ffffffd9;border:1px solid #fff6;border-radius:8px;min-width:140px;transition:all .3s cubic-bezier(.16,1,.3,1);position:absolute;top:120%;right:0;overflow:hidden;transform:translateY(-10px);box-shadow:0 10px 30px #0000001a}.lang-dropdown:hover .lang-menu{opacity:1;visibility:visible;transform:translateY(0)}.lang-option{color:var(--text-primary);cursor:pointer;padding:12px 20px;font-size:.9rem;transition:background .2s}.lang-option:hover{color:var(--primary-color);background:#0000000d}.hero{z-index:1;position:relative}.hero:before{content:"";z-index:-1;background:linear-gradient(135deg,#0d2b45cc 0%,#1a527666 100%);position:absolute;inset:0}.btn{transition:all .3s cubic-bezier(.25,.8,.25,1);box-shadow:0 4px 6px #0000001a}.btn:hover{transform:translateY(-2px);box-shadow:0 8px 15px #00000026}[data-theme=dark]{--primary-color:#0a0a0a;--secondary-color:#111;--accent-color:#00e5ff;--background-white:#1a1a1a;--background-light:#111;--text-primary:#fff;--text-secondary:#aaa;--text-light:#fff;--border-color:#333}[data-theme=dark] .navbar{background-color:#0a0a0af2;box-shadow:0 1px 10px #00e5ff1a}[data-theme=dark] .lang-menu{background:#1a1a1ad9;border-color:#333}[data-theme=dark] .lang-option:hover{color:var(--accent-color);background:#00e5ff1a}[data-theme=dark] .brand-text,[data-theme=dark] .text-logo{color:#fff}[data-theme=dark] .btn-primary{background-color:var(--accent-color);color:#000}[data-theme=dark] .btn-primary:hover{color:#000;background-color:#fff;box-shadow:0 8px 15px #00e5ff4d}[data-theme=dark] .feature-icon svg{stroke:var(--accent-color)}.nav-links a{white-space:nowrap}.brand-subtitle{white-space:nowrap;font-size:.7rem}.brand-title{white-space:nowrap}