:root {
    --brand: #06C755;
    --brand-hover: #05A044;
    --bg-white: #ffffff;
    --bg-warm: #FFFDF8;
    --bg-gray: #F5F7F9;
    --text-dark: #333333;
    --text-gray: #666666;
    --border: #E8ECEF;
    --bubble-me: #85E249;
    --bubble-you: #FFFFFF;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: "Noto Sans JP", "Helvetica Neue", Arial, sans-serif; }
body { background: var(--bg-gray); color: var(--text-dark); line-height: 1.7; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* 1. Header Navigation */
header { background: var(--bg-white); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.03); }
.header-wrapper { max-width: 1100px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 75px; padding: 0 20px; }
.logo-box { display: flex; align-items: center; gap: 10px; font-size: 24px; font-weight: 800; color: var(--brand); letter-spacing: -0.5px; }
.logo-box span { font-size: 13px; font-weight: normal; color: var(--text-gray); border-left: 1px solid #ccc; padding-left: 10px; letter-spacing: 0;}
.nav-items { display: flex; gap: 24px; align-items: center; }
.nav-items a { font-size: 14px; font-weight: bold; color: var(--text-dark); transition: color 0.2s; }
.nav-items a:hover { color: var(--brand); }
.nav-btn { background: var(--text-dark); color: var(--bg-white) !important; padding: 10px 20px; border-radius: 30px; font-size: 13px; }
.nav-btn:hover { background: #555; }

/* 2. Main Visual (Chat continuation appeal) */
.hero-sec { background: var(--bg-warm); padding: 70px 20px; border-bottom: 1px solid var(--border); overflow: hidden; }
.hero-inner { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; gap: 50px; }
.hero-content { flex: 1; }
.chat-concept { display: inline-flex; align-items: center; gap: 8px; background: #E6F8ED; color: var(--brand-hover); padding: 6px 16px; border-radius: 20px; font-size: 13px; font-weight: bold; margin-bottom: 20px; }
.hero-content h2 { font-size: 40px; line-height: 1.35; margin-bottom: 20px; font-weight: 900; color: var(--text-dark); }
.hero-content p { font-size: 16px; color: var(--text-gray); margin-bottom: 35px; }
.hero-btn { display: inline-block; background: var(--brand); color: #fff; font-size: 18px; font-weight: bold; padding: 16px 40px; border-radius: 50px; box-shadow: 0 5px 15px rgba(6, 199, 85, 0.3); transition: 0.3s; }
.hero-btn:hover { background: var(--brand-hover); transform: translateY(-3px); box-shadow: 0 8px 20px rgba(6, 199, 85, 0.4); }

.hero-visual { flex: 1; position: relative; }
/* Simulated Chat Bubble UI */
.chat-ui { background: #74A5D1; padding: 20px; border-radius: 16px; box-shadow: 0 20px 40px rgba(0,0,0,0.15); border: 4px solid #fff; position: relative; z-index: 2; }
.chat-msg { display: flex; flex-direction: column; gap: 15px; }
.bubble { max-width: 80%; padding: 12px 16px; border-radius: 16px; font-size: 14px; line-height: 1.5; box-shadow: 0 2px 5px rgba(0,0,0,0.05); }
.b-you { background: var(--bubble-you); align-self: flex-start; border-top-left-radius: 4px; }
.b-me { background: var(--bubble-me); align-self: flex-end; border-top-right-radius: 4px; }
.b-time { font-size: 11px; color: rgba(255,255,255,0.8); margin-top: 5px; text-align: right; }
.chat-img { margin-top: 20px; border-radius: 12px; overflow: hidden; border: 2px solid #fff; }

/* 3. Category Navigation */
.section { max-width: 1100px; margin: 80px auto; padding: 0 20px; }
.sec-header { text-align: center; margin-bottom: 50px; }
.sec-header h2 { font-size: 28px; font-weight: bold; color: var(--text-dark); margin-bottom: 15px; }
.sec-header p { font-size: 15px; color: var(--text-gray); }
.cat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.cat-box { background: var(--bg-white); border: 1px solid var(--border); padding: 25px 20px; border-radius: 12px; text-align: center; transition: 0.3s; }
.cat-box:hover { border-color: var(--brand); box-shadow: 0 8px 25px rgba(0,0,0,0.06); transform: translateY(-3px); }
.cat-box h4 { font-size: 17px; margin-bottom: 10px; color: var(--text-dark); }
.cat-box p { font-size: 13px; color: var(--text-gray); }

/* 4. Announcement Area */
.news-wrap { max-width: 900px; margin: 0 auto 80px; background: var(--bg-white); border-radius: 12px; border: 1px solid var(--border); padding: 35px; }
.news-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 2px solid var(--bg-gray); padding-bottom: 15px; margin-bottom: 20px; }
.news-header h3 { font-size: 20px; }
.news-header a { font-size: 14px; color: var(--brand); font-weight: bold; }
.news-item { display: flex; align-items: center; gap: 16px; padding: 16px 0; border-bottom: 1px dashed var(--border); }
.news-item:last-child { border-bottom: none; padding-bottom: 0; }
.n-date { font-size: 14px; color: var(--text-gray); font-family: monospace; }
.n-tag { background: #E6F8ED; color: var(--brand-hover); font-size: 12px; padding: 4px 10px; border-radius: 20px; font-weight: bold; }
.n-text { font-size: 15px; transition: color 0.2s; }
.news-item:hover .n-text { color: var(--brand); text-decoration: underline; }

/* 5. Features / Columns Area */
.col-bg { background: var(--bg-white); padding: 80px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); margin-bottom: 80px; }
.col-container { max-width: 1100px; margin: 0 auto; padding: 0 20px; display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; }
.col-card { background: var(--bg-gray); border-radius: 12px; overflow: hidden; transition: 0.3s; }
.col-card:hover { transform: translateY(-5px); box-shadow: 0 10px 25px rgba(0,0,0,0.08); }
.col-img { height: 190px; }
.col-img img { width: 100%; height: 100%; object-fit: cover; }
.col-content { padding: 25px; }
.col-content h5 { font-size: 18px; margin-bottom: 12px; color: var(--text-dark); }
.col-content p { font-size: 14px; color: var(--text-gray); line-height: 1.6; }

/* 6. Help Center & 7. Official Account */
.bottom-area { display: flex; gap: 30px; flex-wrap: wrap; margin-bottom: 80px; }
.b-card { flex: 1; min-width: 320px; background: var(--bg-white); padding: 40px; border-radius: 12px; border: 1px solid var(--border); text-align: center; }
.b-card.help { border-top: 4px solid var(--brand); }
.b-card.sns { border-top: 4px solid var(--text-dark); }
.b-card h3 { font-size: 22px; margin-bottom: 15px; font-weight: bold; }
.b-card p { font-size: 14px; color: var(--text-gray); margin-bottom: 25px; }
.btn-line { display: inline-block; padding: 12px 30px; border: 2px solid var(--brand); color: var(--brand-hover); font-weight: bold; border-radius: 30px; transition: 0.3s; }
.btn-line:hover { background: var(--brand); color: #fff; }
.sns-links { display: flex; justify-content: center; gap: 10px; }
.sns-btn { background: var(--bg-gray); padding: 10px 20px; border-radius: 20px; font-size: 13px; font-weight: bold; color: var(--text-dark); transition: 0.2s; border: 1px solid var(--border); }
.sns-btn:hover { background: #e0e0e0; }

/* 8. Footer */
footer { background: #222222; color: #aaaaaa; padding: 60px 20px 20px; }
.foot-grid { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; margin-bottom: 40px; }
.foot-col h4 { font-size: 15px; color: #ffffff; margin-bottom: 20px; }
.foot-col ul { list-style: none; }
.foot-col ul li { margin-bottom: 12px; }
.foot-col ul li a { font-size: 14px; transition: color 0.3s; }
.foot-col ul li a:hover { color: var(--bg-white); text-decoration: underline; }
.foot-copy { max-width: 1100px; margin: 0 auto; text-align: center; border-top: 1px solid #444; padding-top: 25px; font-size: 12px; }

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