/* 学習塾デモ — WordPress構築を想定した明るい青×黄 */
:root{
  --main: #1e5aa8;
  --accent: #f6b93b;
  --bg: #f5f8fc;
  --paper: #fff;
  --ink: #23303f;
  --gray: #6b7787;
  --line: #dfe7f2;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Hiragino Sans","Yu Gothic",sans-serif;color:var(--ink);background:var(--bg);line-height:1.85;font-size:15px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
.demo-flag{background:#1a1a1a;color:#fff;text-align:center;font-size:12px;padding:9px;letter-spacing:.05em}
.demo-flag a{color:#ffd27a;font-weight:700;text-decoration:underline}
.wp-flag{background:#f6b93b;color:#23303f;text-align:center;font-size:11.5px;padding:7px;font-weight:700}

header{background:var(--paper);padding:18px 0;border-bottom:3px solid var(--main)}
header .wrap{display:flex;justify-content:space-between;align-items:center}
.logo{font-size:19px;font-weight:800;color:var(--main);display:flex;align-items:center;gap:10px}
.logo .mark{width:34px;height:34px;background:var(--main);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:14px}
nav a{margin-left:26px;font-size:13.5px;font-weight:700;color:var(--ink)}
nav a:hover{color:var(--main)}

.hero{background:linear-gradient(120deg,var(--main),#123c73);color:#fff;padding:90px 24px;text-align:center}
.hero .kicker{background:var(--accent);color:#23303f;display:inline-block;padding:6px 18px;border-radius:999px;font-size:12px;font-weight:800;margin-bottom:22px}
.hero h1{font-size:clamp(26px,4.6vw,42px);font-weight:800;line-height:1.6;margin-bottom:22px}
.hero p{color:#cfe0f5;max-width:520px;margin:0 auto 34px;font-size:14.5px}
.btn{
  display:inline-block;background:var(--accent);color:#23303f;padding:15px 36px;border-radius:8px;
  font-size:14px;font-weight:800;transition:transform .2s ease;
}
.btn:hover{transform:translateY(-3px)}
.btn-outline{border:2px solid #fff;color:#fff;padding:13px 34px;border-radius:8px;font-size:14px;font-weight:800;margin-left:10px}

section{padding:76px 0}
.head{text-align:center;margin-bottom:46px}
.head .tag{font-size:11px;letter-spacing:.2em;color:var(--main);font-weight:800;margin-bottom:10px}
.head h2{font-size:25px;font-weight:800}

.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature{background:var(--paper);border-radius:12px;padding:30px 26px;border:1px solid var(--line)}
.feature .n{width:40px;height:40px;background:var(--main);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:16px}
.feature h3{font-size:16px;font-weight:800;margin-bottom:10px}
.feature p{font-size:13px;color:var(--gray)}

.news-list{background:var(--paper);border-radius:12px;border:1px solid var(--line);overflow:hidden}
.news-item{display:flex;gap:20px;padding:20px 24px;border-bottom:1px solid var(--line);align-items:baseline}
.news-item:last-child{border-bottom:none}
.news-date{font-size:12px;color:var(--gray);font-weight:700;white-space:nowrap}
.news-cat{background:var(--main);color:#fff;font-size:10.5px;padding:3px 10px;border-radius:999px;font-weight:700}
.news-item h4{font-size:14px;font-weight:700}

.cta-band{background:var(--accent);text-align:center;padding:64px 24px}
.cta-band h2{font-size:22px;font-weight:800;margin-bottom:16px;color:#23303f}
.cta-band p{color:#4a3d1f;margin-bottom:26px;font-size:13.5px}
.cta-band .btn{background:var(--main);color:#fff}

footer{background:var(--main);color:#cfe0f5;text-align:center;padding:32px;font-size:11.5px}

@media (max-width:768px){
  nav{display:none}
  .grid3{grid-template-columns:1fr}
  .news-item{flex-direction:column;gap:8px}
}