*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--mint: #4DB6AC;--mint-dark: #00897B;--mint-light: #E0F2F1;--mint-mid: #80CBC4;--text: #1a1a1a;--text-sub: #555;--white: #ffffff;--border: #e0e0e0;--radius: 12px;--max-width: 780px}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Hiragino Sans,Hiragino Kaku Gothic ProN,Meiryo,sans-serif;color:var(--text);line-height:1.8;background:var(--white)}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}.header{position:sticky;top:0;z-index:100;background:#fffffff2;backdrop-filter:blur(8px);border-bottom:1px solid var(--border);padding:0 24px}.header-inner{max-width:900px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:60px}.logo{display:flex;align-items:center;gap:10px;text-decoration:none}.logo img{height:30px;width:auto}.logo-text{font-size:1.1rem;font-weight:700;color:var(--text)}.logo-text span{color:var(--mint)}.header-cta{background:var(--mint);color:#fff;font-weight:600;font-size:.875rem;line-height:1.7;padding:8px 20px;border-radius:24px;transition:background .2s}.header-cta:hover{background:var(--mint-dark)}.breadcrumb{padding:16px 24px;max-width:var(--max-width);margin:0 auto;font-size:.8rem;color:var(--text-sub)}.breadcrumb a{color:var(--mint-dark)}.breadcrumb a:hover{text-decoration:underline}.breadcrumb span{margin:0 6px}.article-wrap{max-width:var(--max-width);margin:0 auto;padding:0 24px 80px}.article-header{margin-bottom:40px}.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.tag{display:inline-block;background:var(--mint-light);color:var(--mint-dark);font-size:.75rem;font-weight:600;padding:3px 12px;border-radius:24px}.article-header h1{font-size:clamp(1.4rem,4vw,2rem);font-weight:800;line-height:1.4;margin-bottom:12px}.article-meta{font-size:.85rem;color:var(--text-sub)}.article-divider{border:none;border-top:1px solid var(--border);margin:24px 0 40px}.article-body h2{font-size:1.35rem;font-weight:700;margin:48px 0 16px;padding-left:14px;border-left:4px solid var(--mint)}.article-body h3{font-size:1.1rem;font-weight:700;margin:32px 0 12px;color:var(--mint-dark)}.article-body p{margin-bottom:20px}.article-body ul,.article-body ol{margin:0 0 20px 24px}.article-body li{margin-bottom:8px}.article-body strong{font-weight:700}.article-body a{color:var(--mint-dark);text-decoration:underline}.article-body a:hover{color:var(--mint)}.article-body blockquote{border-left:4px solid var(--mint-mid);padding:12px 20px;margin:24px 0;background:var(--mint-light);border-radius:0 var(--radius) var(--radius) 0;color:var(--text-sub)}.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:.9rem}.article-body th{background:var(--mint-light);color:var(--mint-dark);padding:10px 14px;border:1px solid #b0b0b0;font-weight:700;text-align:left}.article-body td{padding:10px 14px;border:1px solid #b0b0b0}.article-body tr:nth-child(2n) td{background:#fafafa}.cta-box{background:var(--mint-light);border:1px solid var(--mint-mid);border-radius:var(--radius);padding:32px;text-align:center;margin:48px 0}.cta-box p{font-size:1rem;color:var(--text-sub);margin-bottom:20px}.cta-btn{display:inline-block;background:var(--mint);color:var(--white);font-weight:700;font-size:1rem;padding:14px 36px;border-radius:32px;transition:background .2s,transform .15s;box-shadow:0 4px 16px #4db6ac4d}.cta-btn:hover{background:var(--mint-dark);transform:translateY(-2px)}.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--mint-dark);font-size:.875rem;margin-top:48px;font-weight:600}.back-link:hover{text-decoration:underline}footer{background:var(--text);color:#ffffffb3;padding:36px 24px;text-align:center}.footer-inner{max-width:900px;margin:0 auto}.footer-links{display:flex;justify-content:center;gap:24px;margin-bottom:20px;flex-wrap:wrap}.footer-links a{font-size:.875rem;color:#ffffffb3;transition:color .2s}.footer-links a:hover{color:var(--white)}.footer-copy{font-size:.8rem}.waligift-cta{background:linear-gradient(135deg,#fdf0ee,#faf8f5);border:1px solid #EED5D2;border-radius:var(--radius);padding:32px;text-align:center;margin:48px 0 0}.waligift-cta-badge{display:inline-block;background:#f9edec;color:#b8655b;border:1px solid #E8B4AF;font-size:.75rem;font-weight:700;padding:3px 12px;border-radius:24px;margin-bottom:14px;letter-spacing:.05em}.waligift-cta h3{font-size:1.1rem;font-weight:800;color:#3d3530;margin-bottom:10px}.waligift-cta h3 span{color:#d4847a}.waligift-cta p{font-size:.88rem;color:#9b8e88;margin-bottom:22px;line-height:1.7}.waligift-cta-btn{display:inline-block;background:#d4847a;color:#fff;font-weight:700;font-size:.95rem;padding:12px 32px;border-radius:32px;transition:background .2s,transform .15s;box-shadow:0 4px 14px #d4847a4d}.waligift-cta-btn:hover{background:#b8655b;transform:translateY(-1px);text-decoration:none}@media(max-width:600px){.article-body h2{font-size:1.15rem}}