:root{--primary-color:#004085;--accent-color:#cce5ff;--text-color:#333;--bg-color:#fff;--font-base:"Helvetica Neue" , Arial , "Hiragino Kaku Gothic ProN" , "Hiragino Sans" , Meiryo , sans-serif;--font-serif:"Times New Roman" , "YuMincho" , "Hiragino Mincho ProN" , serif}body{font-family: var(--font-base);color:var(--text-color);background-color:#fdfdfd;line-height:1.9;margin:0;padding:0;-webkit-text-size-adjust:100%}a{color:var(--primary-color);text-decoration:none;transition:opacity .3s}a:hover{opacity:.7;text-decoration:underline}.container{max-width:800px;margin:0 auto;padding:20px}header{border-bottom:2px solid var(--primary-color);margin-bottom:40px;padding:20px 0}.site-title{font-size:1.2rem;font-weight:bold;color:var(--primary-color);display:block}article{margin-bottom:60px}h1{font-size:clamp(20px,4vw,28px);line-height:1.4;margin-bottom:40px;padding-bottom:15px;border-bottom:1px solid #ddd;word-wrap:break-word}h2{font-size:clamp(18px,3.5vw,22px);background:linear-gradient(to right,#f0f8ff,transparent);padding:12px 15px;border-left:5px solid var(--primary-color);margin-top:60px;margin-bottom:30px}h3{font-size:1.1rem;margin-top:40px;margin-bottom:20px;border-bottom:1px dashed #ccc;padding-bottom:5px;display:inline-block}p{margin-bottom:2em;text-align:justify;word-break:break-all}ul,ol{background:#f9f9f9;padding:30px 40px;border-radius:8px;margin-bottom:40px}li{margin-bottom:10px}.column-box{border:2px solid var(--accent-color);padding:25px;border-radius:8px;margin:40px 0;background:#fff}.column-title{font-weight:bold;color:var(--primary-color);display:block;margin-bottom:10px}.voice-bubble{font-family: var(--font-serif);font-style:italic;color:#555;background:#f4f4f4;padding:15px;border-radius:0 15px 15px 15px;margin:20px 0 40px 20px;font-size:.95rem;position:relative;border-left:4px solid #aaa}.voice-bubble::before{content:"💭";position:absolute;top:-15px;left:0;font-size:1.2rem}strong{background:linear-gradient(transparent 70%,#fff799 70%);font-weight:bold}footer{text-align:center;font-size:.8rem;color:#777;margin-top:80px;padding-top:40px;border-top:1px solid #eee}@media (max-width:600px){.container{padding:15px}h1{font-size:22px}.voice-bubble{margin-left:0}}.nav-links{display:flex;justify-content:space-between;margin-top:60px;padding-top:30px;border-top:1px solid #eee;gap:15px}.nav-button{display:inline-block;padding:15px 25px;background-color:#f8f9fa;color:var(--primary-color);border:1px solid #ddd;border-radius:50px;font-size:.9rem;font-weight:bold;text-decoration:none;transition:all .3s ease;width:45%;text-align:center;box-shadow:0 2px 4px rgba(0,0,0,.05)}.nav-button:hover{background-color:var(--primary-color);color:#fff;border-color:var(--primary-color);text-decoration:none;transform:translateY(-2px);box-shadow:0 4px 8px rgba(0,0,0,.1)}@media (max-width:600px){.nav-links{font-size:.8rem}.nav-button{padding:12px 10px}}