:root {
  --orange: #e8740e;
  --orange-dark: #c75d00;
  --orange-soft: #fce8d0;
  --cream: #fdf6ee;
  --ink: #333;
  --muted: #6f6f6f;
  --green: #06c755;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--cream); color: var(--ink); font-family: "Noto Sans JP", sans-serif; line-height: 1.9; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; height: auto; max-width: 100%; }
header { background: rgba(235,235,235,.97); box-shadow: 0 2px 10px rgba(0,0,0,.08); left: 0; padding: 0 20px; position: fixed; top: 0; width: 100%; z-index: 1000; }
.header-inner { align-items: center; display: flex; height: 70px; justify-content: space-between; margin: 0 auto; max-width: 1200px; }
.header-logo img { height: 50px; mix-blend-mode: multiply; width: auto; }
.header-nav { align-items: center; display: flex; gap: 25px; }
.header-nav a { color: #555; font-size: .9rem; font-weight: 500; }
.header-nav a:hover, .header-nav a.active { color: var(--orange); }
.header-buttons { display: flex; gap: 8px; }
.btn-line-header, .btn-contact-header { border-radius: 99px; color: #fff; font-size: .85rem; font-weight: 700; padding: 8px 16px; }
.btn-line-header { background: var(--green); }
.btn-contact-header { background: var(--orange); }
.hamburger { background: none; border: 0; cursor: pointer; display: none; height: 26px; position: relative; width: 32px; z-index: 1100; }
.hamburger span { background: var(--orange); border-radius: 3px; display: block; height: 3px; left: 0; position: absolute; transition: .25s; width: 100%; }
.hamburger span:nth-child(1) { top: 1px; }.hamburger span:nth-child(2) { top: 11px; }.hamburger span:nth-child(3) { top: 21px; }
.hamburger.active span:nth-child(1) { top: 11px; transform: rotate(45deg); }.hamburger.active span:nth-child(2) { opacity: 0; }.hamburger.active span:nth-child(3) { top: 11px; transform: rotate(-45deg); }
.mobile-nav { background: #fff; box-shadow: -5px 0 20px rgba(0,0,0,.12); display: none; height: 100vh; max-width: 350px; overflow-y: auto; padding: 90px 30px 30px; position: fixed; right: -100%; top: 0; transition: right .25s; width: 82%; z-index: 1050; }
.mobile-nav.open { right: 0; }
.mobile-nav a { border-bottom: 1px solid #eee; display: block; padding: 14px 0; }
.mobile-overlay { background: rgba(0,0,0,.5); display: none; inset: 0; position: fixed; z-index: 1040; }.mobile-overlay.show { display: block; }
.page-hero { background: linear-gradient(135deg,var(--orange),#f5a623); color: #fff; margin-top: 70px; overflow: hidden; padding: 38px 20px; position: relative; text-align: center; }
.page-hero::before { background: rgba(255,255,255,.07); border-radius: 50%; content: ""; height: 360px; position: absolute; right: -80px; top: -190px; width: 360px; }
.page-hero h1 { font-family: "Noto Serif JP",serif; font-size: clamp(1.45rem,3vw,2rem); position: relative; }
.breadcrumb { font-size: .82rem; margin-top: 8px; opacity: .88; position: relative; }
.article-container { display: grid; gap: 38px; grid-template-columns: minmax(0,1fr) 300px; margin: 0 auto; max-width: 1200px; padding: 48px 20px 80px; }
.article-main { background: #fff; border-radius: 20px; box-shadow: 0 4px 20px rgba(0,0,0,.06); overflow: hidden; }
.article-hero-img { aspect-ratio: 3/2; max-height: 470px; object-fit: cover; width: 100%; }
.article-content { padding: 38px; }
.article-meta { align-items: center; display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.article-date { color: #888; font-size: .84rem; }.article-tag { background: var(--orange-soft); border-radius: 99px; color: var(--orange-dark); font-size: .76rem; font-weight: 700; padding: 4px 12px; }
.article-content > h1 { border-bottom: 2px solid #f0e8df; font-family: "Noto Serif JP",serif; font-size: clamp(1.45rem,3vw,1.9rem); line-height: 1.6; margin-bottom: 26px; padding-bottom: 18px; }
.lead { color: #3f3f3f; font-size: 1.04rem; }
.article-body h2 { background: linear-gradient(90deg,var(--cream),transparent); border-left: 4px solid var(--orange); font-family: "Noto Serif JP",serif; font-size: 1.38rem; line-height: 1.55; margin: 42px 0 18px; padding: 12px 12px 12px 18px; }
.article-body h3 { color: #4b4b4b; font-size: 1.13rem; margin: 27px 0 10px; padding-left: 16px; position: relative; }
.article-body h3::before { background: var(--orange); border-radius: 50%; content: ""; height: 7px; left: 0; position: absolute; top: .75em; width: 7px; }
.article-body p { color: #444; margin-bottom: 18px; }
.article-body ul, .article-body ol { margin: 14px 0 22px 1.4em; padding-left: .7em; }.article-body li { margin-bottom: 8px; }
.article-body ul { list-style: disc; }.article-body ol { list-style: decimal; }
.article-body strong { color: #2e2e2e; }
.article-figure { margin: 30px 0 34px; }.article-figure img { border-radius: 14px; box-shadow: 0 4px 18px rgba(0,0,0,.1); width: 100%; }.article-figure figcaption { color: #777; font-size: .8rem; margin-top: 8px; text-align: center; }
.note, .warning, .point { border-radius: 14px; margin: 24px 0; padding: 20px 24px; }.note { background: #f7f7f7; border-left: 4px solid #888; }.warning { background: #fff5e8; border: 1px solid #ffd39a; }.point { background: linear-gradient(135deg,#fffaf4,#fce8d0); border-left: 4px solid var(--orange); }
.note h4, .warning h4, .point h4 { font-size: 1rem; margin-bottom: 7px; }.warning h4, .point h4 { color: var(--orange-dark); }
.compare-table { border-collapse: collapse; box-shadow: 0 2px 12px rgba(0,0,0,.06); margin: 22px 0 28px; overflow: hidden; width: 100%; }.compare-table th,.compare-table td { border: 1px solid #eadfd4; padding: 13px 15px; text-align: left; vertical-align: top; }.compare-table th { background: var(--orange); color: #fff; font-size: .9rem; }.compare-table tr:nth-child(even) td { background: #fffaf5; }
.source-list { background: #f8f8f8; border-radius: 12px; font-size: .86rem; margin: 25px 0; padding: 20px 24px; }.source-list a { color: #b95200; text-decoration: underline; }
.contact-visual { border-radius: 18px; box-shadow: 0 5px 20px rgba(0,0,0,.12); margin-top: 42px; overflow: hidden; position: relative; }.contact-visual > img { aspect-ratio: 3/2; object-fit: cover; width: 100%; }.contact-overlay { align-items: flex-start; background: linear-gradient(90deg,rgba(94,41,0,.9) 0%,rgba(155,70,0,.76) 43%,rgba(0,0,0,.08) 72%); color: #fff; display: flex; flex-direction: column; inset: 0; justify-content: center; padding: 6%; position: absolute; width: 100%; }.contact-overlay h2 { background: none; border: 0; color: #fff; font-family: "Noto Sans JP",sans-serif; font-size: clamp(1.3rem,3.2vw,2rem); margin: 0 0 8px; padding: 0; }.contact-overlay p { color: #fff; line-height: 1.7; margin-bottom: 15px; text-shadow: 0 1px 3px rgba(0,0,0,.4); }.contact-actions { display: flex; flex-wrap: wrap; gap: 9px; }.contact-actions a { background: #fff; border-radius: 99px; color: var(--orange-dark); font-size: .88rem; font-weight: 800; padding: 10px 16px; }.contact-actions a.line { background: var(--green); color: #fff; }
.article-nav { border-top: 1px solid #eee; display: grid; gap: 12px; grid-template-columns: 1fr 1fr; margin-top: 34px; padding-top: 22px; }.article-nav a { background: #fafafa; border-radius: 10px; font-size: .86rem; padding: 12px; }.article-nav a:last-child { text-align: right; }.article-nav span { color: var(--orange-dark); display: block; font-size: .76rem; font-weight: 700; }
.sidebar-widget, .sidebar-cta { background: #fff; border-radius: 15px; box-shadow: 0 3px 15px rgba(0,0,0,.05); margin-bottom: 24px; padding: 22px; }.sidebar-widget h2,.sidebar-cta h2 { border-bottom: 2px solid var(--orange); font-size: 1.05rem; margin-bottom: 14px; padding-bottom: 9px; }.sidebar-categories a { align-items: center; border-bottom: 1px solid #eee; display: flex; font-size: .9rem; justify-content: space-between; padding: 9px 0; }.sidebar-categories a:hover { color: var(--orange); }.count { background: var(--orange-soft); border-radius: 99px; color: var(--orange-dark); font-size: .7rem; padding: 1px 8px; }
.sidebar-cta { background: linear-gradient(135deg,var(--orange),#f4a328); color: #fff; text-align: center; }.sidebar-cta h2 { border-color: rgba(255,255,255,.55); }.sidebar-cta p { font-size: .86rem; }.sidebar-cta a { background: #fff; border-radius: 99px; color: var(--orange-dark); display: block; font-weight: 800; margin-top: 10px; padding: 10px; }.sidebar-cta a.line { background: var(--green); color: #fff; }
.related a { border-bottom: 1px solid #eee; display: block; font-size: .87rem; line-height: 1.55; padding: 10px 0; }.related a:hover { color: var(--orange); }
footer { background: #333; color: #ddd; padding: 38px 20px 22px; }.footer-inner { display: grid; gap: 30px; grid-template-columns: 1.3fr 1fr 1fr; margin: 0 auto; max-width: 1100px; }.footer-title { color: #fff; font-weight: 800; margin-bottom: 8px; }.footer-inner p,.footer-inner a { font-size: .84rem; }.footer-links a { display: block; margin-bottom: 6px; }.copyright { border-top: 1px solid #555; font-size: .75rem; margin: 25px auto 0; max-width: 1100px; padding-top: 16px; text-align: center; }
@media(max-width:900px){.header-nav,.header-buttons{display:none}.hamburger,.mobile-nav{display:block}.article-container{grid-template-columns:1fr}.blog-sidebar{display:grid;gap:18px;grid-template-columns:repeat(2,1fr)}.sidebar-widget,.sidebar-cta{margin:0}.article-content{padding:28px}.footer-inner{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.page-hero{padding:30px 14px}.article-container{padding:28px 12px 55px}.article-main{border-radius:14px}.article-content{padding:22px 18px}.article-body h2{font-size:1.2rem;margin-top:34px}.article-body p{font-size:.95rem}.compare-table{display:block;font-size:.78rem;overflow-x:auto}.compare-table th,.compare-table td{min-width:120px;padding:10px}.blog-sidebar{display:block}.sidebar-widget,.sidebar-cta{margin-bottom:18px}.contact-overlay{background:linear-gradient(90deg,rgba(94,41,0,.93),rgba(123,55,0,.72));padding:18px}.contact-overlay p{font-size:.77rem;margin-bottom:8px;max-width:72%}.contact-actions a{font-size:.72rem;padding:7px 10px}.article-nav{grid-template-columns:1fr}.article-nav a:last-child{text-align:left}.footer-inner{grid-template-columns:1fr}}