@charset "UTF-8";
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&family=Noto+Serif+JP:wght@500;600;700&display=swap');
/* 岡部研究室 サイト共通スタイル（スタイリッシュ版） */

:root{
  --navy:#153a5b;
  --navy-dark:#0e2942;
  --blue:#2b6ea3;
  --accent:#b7902f;      /* 上品なゴールドのアクセント */
  --accent-soft:#f4efe2;
  --ink:#26313b;
  --muted:#6c7883;
  --line:#e7eaee;
  --bg:#f7f9fb;
  --card:#ffffff;
  --maxw:1120px;
  --sans:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
  --serif:"Noto Serif JP","Hiragino Mincho ProN","Yu Mincho",serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--sans);
  color:var(--ink);
  line-height:1.95;
  background:var(--bg);
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--blue);text-decoration:none;transition:color .2s;}
a:hover{color:var(--navy);text-decoration:underline;}

/* ===== ヘッダー ===== */
.site-header{
  background:var(--card);
  border-top:4px solid var(--navy);
}
.header-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:22px 28px 20px;
  display:flex;
  align-items:center;
  gap:18px;
  flex-wrap:wrap;
}
.header-inner .logo{width:64px;height:auto;flex:0 0 auto;}
.brand h1{
  margin:0;
  font-family:var(--serif);
  font-size:1.6rem;
  font-weight:600;
  letter-spacing:.04em;
  line-height:1.55;
  color:var(--navy);
}
.lang-switch{margin-left:auto;align-self:flex-start;}
.lang-switch a{display:inline-block;border:1px solid var(--navy);color:var(--navy);padding:5px 15px;border-radius:20px;font-size:.82rem;font-weight:500;letter-spacing:.03em;}
.lang-switch a:hover{background:var(--navy);color:#fff;text-decoration:none;}
.brand .brand-sub{
  display:block;
  font-family:var(--sans);
  font-size:.92rem;
  font-weight:400;
  color:var(--muted);
  letter-spacing:.02em;
  margin-top:5px;
}

/* ===== ナビ ===== */
nav.mainnav{
  background:linear-gradient(135deg,var(--navy) 0%,#1d557f 100%);
  position:sticky;
  top:0;
  z-index:50;
  box-shadow:0 2px 12px rgba(14,41,66,.18);
}
nav.mainnav ul{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0;
  list-style:none;
  display:flex;
  flex-wrap:wrap;
}
nav.mainnav li{position:relative;}
nav.mainnav a{
  display:block;
  color:#eef3f8;
  padding:14px 20px;
  font-size:.92rem;
  font-weight:500;
  letter-spacing:.03em;
  white-space:nowrap;
  position:relative;
}
nav.mainnav a::after{
  content:"";
  position:absolute;
  left:20px;right:20px;bottom:8px;
  height:2px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .25s;
}
nav.mainnav a:hover{color:#fff;text-decoration:none;background:rgba(255,255,255,.06);}
nav.mainnav a:hover::after,
nav.mainnav a.active::after{transform:scaleX(1);}
nav.mainnav a.active{color:#fff;}
/* サブメニュー */
nav.mainnav li ul{
  display:none;
  position:absolute;
  top:100%;left:0;
  background:var(--navy-dark);
  min-width:170px;
  z-index:60;
  padding:6px 0;
  box-shadow:0 8px 20px rgba(0,0,0,.25);
}
nav.mainnav li:hover ul{display:block;}
nav.mainnav li ul a{padding:10px 18px;font-size:.86rem;}
nav.mainnav li ul a::after{display:none;}

/* ===== 本文レイアウト ===== */
main{
  max-width:var(--maxw);
  margin:0 auto;
  padding:52px 28px 72px;
}
.page-title{
  font-family:var(--serif);
  font-size:1.85rem;
  font-weight:600;
  color:var(--navy);
  letter-spacing:.03em;
  margin:0 0 34px;
  padding-bottom:16px;
  position:relative;
}
.page-title::after{
  content:"";
  position:absolute;left:0;bottom:0;
  width:64px;height:3px;
  background:var(--accent);
}
h2.section{
  font-family:var(--serif);
  font-size:1.3rem;
  font-weight:600;
  color:var(--navy);
  margin:44px 0 16px;
  padding-left:14px;
  border-left:4px solid var(--accent);
}
h3{font-family:var(--serif);font-size:1.08rem;font-weight:600;color:var(--navy);margin:26px 0 10px;}
p{margin:0 0 1.15em;}

/* ===== News（トップ） ===== */
.news-list{margin:0;padding:0;list-style:none;}
.news-list li{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:10px;
  padding:16px 22px;
  margin-bottom:12px;
  display:flex;
  gap:20px;
  align-items:baseline;
  transition:transform .2s, box-shadow .2s, border-color .2s;
}
.news-list li:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 22px rgba(21,58,91,.10);
  border-color:#d5dde5;
}
.news-list .date{
  flex:0 0 96px;
  color:var(--navy);
  font-weight:700;
  font-size:.82rem;
  letter-spacing:.02em;
  padding-top:2px;
}
.news-list .body{flex:1;}

/* ===== 汎用 ===== */
.lead{font-size:1.05rem;color:#3a4650;}
.figure{margin:26px 0;text-align:center;}
.figure img{
  margin:0 auto;
  border-radius:10px;
  box-shadow:0 6px 20px rgba(21,58,91,.12);
}
.figure figcaption{font-size:.86rem;color:var(--muted);margin-top:10px;}
.two-col{display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:start;}
.card{
  background:var(--accent-soft);
  border:1px solid #ece3ca;
  border-left:4px solid var(--accent);
  border-radius:10px;
  padding:22px 26px;
  margin:22px 0;
}

/* 業績リスト */
.pub-list{list-style:none;padding:0;margin:0;}
.pub-list li{
  padding:18px 20px;
  margin-bottom:10px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:10px;
  transition:box-shadow .2s, transform .2s;
}
.pub-list li:hover{box-shadow:0 6px 18px rgba(21,58,91,.08);transform:translateY(-1px);}
.pub-list .authors{font-weight:700;color:var(--navy);}
.pub-list .title{display:block;margin:4px 0;font-family:var(--serif);}
.pub-list .journal{color:var(--muted);font-size:.92rem;}
.pub-list .me{font-weight:700;text-decoration:underline;text-underline-offset:2px;color:var(--navy);}
.pub-list .jname{font-style:italic;font-weight:600;color:var(--navy);}

/* メンバー */
.member-block{
  margin:0 0 12px;
  padding:14px 20px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:10px;
}
.member-role{font-weight:700;color:#fff;background:var(--navy);display:inline-block;padding:2px 12px;border-radius:20px;font-size:.82rem;letter-spacing:.03em;}
.member-names{margin:8px 0 0;font-size:1.02rem;}

/* イベント */
.event{
  padding:30px;
  margin-bottom:18px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:12px;
  transition:box-shadow .2s;
}
.event:hover{box-shadow:0 8px 24px rgba(21,58,91,.09);}
.event .ev-date{
  color:var(--accent);
  font-weight:700;
  font-size:.9rem;
  letter-spacing:.05em;
  margin-bottom:4px;
}
.event .ev-gallery{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:16px;
}
.event .ev-gallery img{
  height:190px;width:auto;
  border-radius:8px;
  box-shadow:0 4px 14px rgba(21,58,91,.12);
  object-fit:cover;
  transition:transform .25s;
}
.event .ev-gallery img:hover{transform:scale(1.03);}

/* アクセス */
.access-map{max-width:520px;margin:22px 0;}
.map-legend{columns:2;font-size:.9rem;color:#3a4650;}
.map-legend p{margin:0 0 .5em;break-inside:avoid;}

/* ===== フッター ===== */
.site-footer{
  background:var(--navy-dark);
  margin-top:56px;
}
.footer-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:30px 28px;
  font-size:.84rem;
  color:#b9c6d3;
  text-align:center;
  letter-spacing:.02em;
}

/* ===== レスポンシブ ===== */
@media(max-width:820px){
  .two-col{grid-template-columns:1fr;}
  nav.mainnav{position:static;}
  nav.mainnav ul{flex-direction:column;}
  nav.mainnav a::after{display:none;}
  nav.mainnav li ul{position:static;min-width:0;box-shadow:none;}
  nav.mainnav li:hover ul{display:block;}
  .map-legend{columns:1;}
  .news-list li{flex-direction:column;gap:4px;}
  .news-list .date{flex-basis:auto;}
  .page-title{font-size:1.55rem;}
}

/* トップのヒーロー */
.hero{position:relative;overflow:hidden;background:radial-gradient(circle at 1px 1px, rgba(255,255,255,.06) 1px, transparent 0),linear-gradient(135deg,#12395b 0%,#1d5a86 100%);background-size:24px 24px,auto;border:1px solid rgba(205,185,138,.55);border-radius:18px;text-align:center;padding:78px 28px;margin:0 0 44px;box-shadow:0 12px 34px rgba(14,41,66,.24);}
.hero .eyebrow{color:var(--accent);font-weight:700;font-size:.78rem;letter-spacing:.18em;margin-bottom:20px;}
.hero .htitle{font-family:var(--serif);font-weight:700;color:#fff;line-height:1.55;margin:0;font-size:clamp(1.6rem,4.6vw,2.55rem);letter-spacing:.03em;text-shadow:0 2px 10px rgba(0,0,0,.22);animation:heroIn .8s ease both;}
.hero .hero-rule{width:52px;height:3px;background:var(--accent);margin:22px auto 0;border-radius:2px;}
.hero .hsub{color:#e6d9b6;font-style:italic;letter-spacing:.04em;margin:20px 0 0;font-size:clamp(.92rem,2vw,1.15rem);animation:heroIn .8s .15s ease both;}
@keyframes heroIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){.hero .htitle,.hero .hsub{animation:none;}}
@media(max-width:640px){.hero{padding:54px 20px;}}

/* 全幅ヒーロー（トップ） */
.hero-full{position:relative;width:100vw;margin-left:calc(50% - 50vw);margin-top:-52px;margin-bottom:10px;
  padding:100px 24px 104px;text-align:center;border-bottom:3px solid var(--accent);
  background:radial-gradient(circle at 1px 1px, rgba(255,255,255,.055) 1px, transparent 0),linear-gradient(135deg,#12395b 0%,#1d5a86 100%);
  background-size:26px 26px,auto;box-shadow:inset 0 -1px 0 rgba(0,0,0,.12);}
.hero-inner{max-width:980px;margin:0 auto;}
.hero-full .nowrap{white-space:nowrap;}
.hero-full .htitle{font-family:var(--serif);font-weight:700;color:#fff;line-height:1.5;margin:0;
  font-size:clamp(1.45rem,3.6vw,2.35rem);letter-spacing:.03em;text-shadow:0 2px 14px rgba(0,0,0,.25);animation:heroIn .9s ease both;}
.hero-full .hsub{color:#e6d9b6;font-style:italic;letter-spacing:.05em;margin:22px 0 0;
  font-size:clamp(.95rem,2.1vw,1.2rem);animation:heroIn .9s .18s ease both;}
.section-eyebrow{color:var(--accent);font-weight:700;font-size:.78rem;letter-spacing:.16em;margin:0 0 6px;}
@media(max-width:640px){.hero-full{padding:72px 20px 76px;}}