:root{--primary-color:#3498db;--secondary-color:#2980b9;--bg-color:#f9f9f9;--text-color:#333;--light-text:#666;--border-color:#ddd;--white:#fff;--shadow:0 4px 6px rgba(0,0,0,.1);--hover-shadow:0 10px 15px rgba(0,0,0,.15)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Microsoft JhengHei,PingFang TC,Heiti TC,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.6}a{text-decoration:none;color:inherit}.container{max-width:1200px;margin:0 auto;padding:0 20px}header{background-color:var(--white);border-bottom:1px solid var(--border-color);padding:20px 0;margin-bottom:40px}header h1{font-size:24px;color:var(--primary-color)}main{min-height:calc(100vh - 200px)}footer{text-align:center;padding:40px 0;color:var(--light-text);font-size:14px;border-top:1px solid var(--border-color);margin-top:60px}.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));grid-gap:30px;gap:30px}.tool-card{background:var(--white);border-radius:8px;padding:30px;box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease;cursor:pointer;display:flex;flex-direction:column;height:100%}.tool-card:hover{transform:translateY(-5px);box-shadow:var(--hover-shadow)}.tool-card h3{color:var(--primary-color);margin-bottom:15px;font-size:20px}.tool-card p{color:var(--light-text);font-size:15px;flex-grow:1}.tool-container{max-width:800px;margin:0 auto;background:var(--white);padding:40px;border-radius:8px;box-shadow:var(--shadow)}.form-group{margin-bottom:20px}label{display:block;margin-bottom:8px;font-weight:700}input,select{width:100%;padding:12px;border:1px solid var(--border-color);border-radius:4px;font-size:16px;transition:border-color .3s}input:focus,select:focus{outline:none;border-color:var(--primary-color)}button{background-color:var(--primary-color);color:#fff;border:none;padding:12px 24px;border-radius:4px;font-size:16px;cursor:pointer;transition:background-color .3s;width:100%}button:hover{background-color:var(--secondary-color)}.result-area{margin-top:30px;padding:20px;background-color:#f0f7fd;border-radius:4px;border-left:4px solid var(--primary-color)}.result-title{font-weight:700;margin-bottom:10px;color:var(--primary-color)}.result-value{font-size:24px;font-weight:700;color:#e74c3c}.breadcrumb{margin-bottom:20px;font-size:14px;color:var(--light-text)}.breadcrumb a:hover{text-decoration:underline;color:var(--primary-color)}@media (max-width:768px){.tool-container{padding:20px}.tool-grid{grid-template-columns:1fr}}