:root{--foreground-rgb:51,51,51;--background-start-rgb:255,255,255;--background-end-rgb:250,250,250;--primary-color:#0f2c59;--secondary-color:#dac0a3;--accent-color:#3876bf;--text-main:#333;--text-light:#666;--white:#fff;--light-gray:#f5f5f5;--font-heading:"Noto Sans JP",sans-serif;--font-body:"Noto Sans JP",sans-serif;--max-width:1200px;--header-height:80px}*{box-sizing:border-box;padding:0;margin:0}body,html{max-width:100vw;overflow-x:hidden;font-family:var(--font-body);color:var(--text-main);background:linear-gradient(to bottom,rgb(var(--background-start-rgb)),rgb(var(--background-end-rgb))) rgb(var(--background-start-rgb));line-height:1.6}a{color:inherit;text-decoration:none;transition:opacity .3s ease}a:hover{opacity:.7}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;line-height:1.3;margin-bottom:1rem;color:var(--primary-color)}.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}.section{padding:80px 0}.btn{display:inline-block;padding:12px 30px;border-radius:4px;font-weight:700;cursor:pointer;transition:all .3s ease;border:none}.btn-primary{background-color:var(--primary-color);color:var(--white)}.btn-primary:hover{background-color:var(--accent-color)}.text-center{text-align:center}.mb-1{margin-bottom:1rem}.mb-2{margin-bottom:2rem}.mb-4{margin-bottom:4rem}