:root {
    --brand-color: #00B900;
    --brand-hover: #009900;
    --text-main: #333333;
    --text-muted: #777777;
    --bg-white: #FFFFFF;
    --bg-light: #F5F7F9;
    --border-color: #E2E2E2;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; }
body { background: var(--bg-white); color: var(--text-main); line-height: 1.6; }
a { text-decoration: none; color: inherit; }

/* 1. Header Navigation */
header { background: var(--bg-white); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 1000; box-shadow: 0 1px 4px rgba(0,0,0,0.05); }
.header-wrapper { max-width: 1100px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 70px; padding: 0 20px; }
.site-logo { display: flex; align-items: center; gap: 8px; font-size: 22px; font-weight: bold; color: var(--text-main); }
.site-logo span { color: var(--brand-color); }
.global-nav { display: flex; gap: 20px; align-items: center; }
.global-nav a { font-size: 14px; font-weight: 500; transition: color 0.3s; }
.global-nav a:hover { color: var(--brand-color); }
.header-btn { background: var(--text-main); color: #fff !important; padding: 8px 20px; border-radius: 4px; font-weight: bold; }
.header-btn:hover { background: #555; }

/* 2. Main Visual Slider */
.hero { background: var(--bg-light); padding: 60px 20px; border-bottom: 1px solid var(--border-color); }
.hero-inner { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; gap: 40px; }
.hero-content { flex: 1; }
.hero-content h2 { font-size: 34px; line-height: 1.4; margin-bottom: 20px; color: var(--text-main); }
.hero-content p { font-size: 16px; color: var(--text-muted); margin-bottom: 30px; }
.hero-img { flex: 1; border-radius: 10px; overflow: hidden; box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
.hero-img img { width: 100%; display: block; }
.btn-primary { display: inline-block; background: var(--brand-color); color: #fff; padding: 14px 40px; border-radius: 4px; font-weight: bold; font-size: 16px; transition: background 0.3s; }
.btn-primary:hover { background: var(--brand-hover); color: #fff; }

/* ** Core Features: Chat, Calendar, Board ** */
.core-features { max-width: 1100px; margin: -40px auto 60px; position: relative; z-index: 10; padding: 0 20px; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.feat-box { background: var(--bg-white); padding: 30px; border-radius: 8px; box-shadow: 0 5px 20px rgba(0,0,0,0.08); border: 1px solid var(--border-color); text-align: center; transition: transform 0.3s; }
.feat-box:hover { transform: translateY(-5px); border-color: var(--brand-color); }
.feat-icon { font-size: 40px; margin-bottom: 15px; }
.feat-box h3 { font-size: 20px; margin-bottom: 10px; color: var(--text-main); }
.feat-box p { font-size: 14px; color: var(--text-muted); }

/* 3. Category Navigation */
.section { max-width: 1100px; margin: 80px auto; padding: 0 20px; }
.section-title { font-size: 24px; text-align: center; margin-bottom: 40px; font-weight: bold; }
.cat-links { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 15px; }
.cat-card { display: flex; align-items: center; justify-content: center; padding: 20px; background: var(--bg-white); border: 1px solid var(--border-color); border-radius: 8px; font-weight: bold; font-size: 15px; transition: 0.3s; }
.cat-card:hover { background: var(--brand-color); color: #fff; border-color: var(--brand-color); }

/* 4. Announcement Area */
.news-box { max-width: 900px; margin: 0 auto 80px; background: var(--bg-white); border: 1px solid var(--border-color); border-radius: 8px; padding: 30px; }
.news-box h2 { font-size: 20px; margin-bottom: 20px; border-bottom: 2px solid var(--text-main); padding-bottom: 10px; }
.news-item { display: flex; align-items: center; padding: 15px 0; border-bottom: 1px dashed var(--border-color); gap: 15px; font-size: 14px; }
.news-date { color: var(--text-muted); min-width: 90px; }
.news-label { background: var(--bg-light); border: 1px solid var(--border-color); padding: 3px 8px; border-radius: 3px; font-size: 12px; }
.news-title { transition: 0.2s; }
.news-item:hover .news-title { color: var(--brand-color); }

/* 5. Features / Columns Area */
.cols-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; }
.col-card { background: var(--bg-white); border-radius: 8px; overflow: hidden; border: 1px solid var(--border-color); transition: box-shadow 0.3s; }
.col-card:hover { box-shadow: 0 8px 25px rgba(0,0,0,0.06); }
.col-img { height: 190px; background: #eee; }
.col-img img { width: 100%; height: 100%; object-fit: cover; }
.col-body { padding: 25px; }
.col-body h4 { font-size: 18px; margin-bottom: 10px; }
.col-body p { font-size: 13px; color: var(--text-muted); }

/* 6. Help Center & 7. Official Account */
.support-area { display: flex; gap: 30px; flex-wrap: wrap; margin-bottom: 80px; }
.sp-card { flex: 1; min-width: 320px; padding: 40px; text-align: center; border-radius: 8px; }
.sp-help { background: #E8F5E9; border: 1px solid #C8E6C9; }
.sp-sns { background: var(--bg-light); border: 1px solid var(--border-color); }
.sp-card h3 { font-size: 22px; margin-bottom: 15px; }
.sp-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 20px; }
.sp-btn { display: inline-block; padding: 10px 25px; border-radius: 4px; font-weight: bold; font-size: 14px; transition: 0.3s; }
.btn-help { background: var(--brand-color); color: #fff; }
.btn-help:hover { background: var(--brand-hover); }
.sns-list { display: flex; justify-content: center; gap: 10px; }
.btn-sns { background: #fff; border: 1px solid #ccc; padding: 8px 16px; border-radius: 20px; font-size: 13px; font-weight: bold; }
.btn-sns:hover { background: #eee; }

/* 8. Footer */
footer { background: #222222; color: #E0E0E0; padding: 50px 20px 20px; }
.foot-grid { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; margin-bottom: 40px; }
.foot-col h4 { font-size: 14px; color: #FFFFFF; margin-bottom: 15px; }
.foot-col ul { list-style: none; }
.foot-col ul li { margin-bottom: 10px; }
.foot-col ul li a { font-size: 13px; color: #BDBDBD; transition: 0.3s; }
.foot-col ul li a:hover { color: #FFFFFF; text-decoration: underline; }
.foot-bottom { border-top: 1px solid #444; padding-top: 20px; text-align: center; font-size: 12px; }

img{height:auto}
.wrap,.news,.cols,.two,footer{content-visibility:auto;contain-intrinsic-size:auto 520px}