:root {
    --primary: #000000;
    --accent: #0071e3;
    --text: #1d1d1f;
    --text-muted: #86868b;
    --bg: #ffffff;
    --bg-alt: #f5f5f7;
    --transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; }

/* --- 高端科技 Logo --- */
.logo {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 28px;
    letter-spacing: 2px;
    color: var(--primary);
    position: relative;
    display: flex;
    align-items: center;
    cursor: pointer;
}

.logo::before {
    content: '';
    width: 32px;
    height: 32px;
    border: 3px solid var(--accent);
    margin-right: 12px;
    border-radius: 6px;
    transform: rotate(45deg);
    display: inline-block;
}

.logo::after {
    content: '';
    position: absolute;
    left: 8px;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 2px;
}

/* --- 导航栏 --- */
#navbar {
    position: fixed;
    top: 0; width: 100%; z-index: 1000;
    padding: 30px 0;
    transition: var(--transition);
}

#navbar.nav-scrolled {
    padding: 15px 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(25px);
    box-shadow: 0 10px 40px rgba(0,0,0,0.05);
}

#navbar .container {
    display: flex; justify-content: space-between; align-items: center;
}

.nav-links { display: flex; list-style: none; gap: 40px; }
.nav-links a {
    text-decoration: none; color: var(--text); font-weight: 500; font-size: 13px;
    text-transform: uppercase; letter-spacing: 1px; transition: var(--transition);
}
.nav-links a:hover { color: var(--accent); }

.lang-switcher button {
    background: none; border: 1px solid #ddd; padding: 6px 12px;
    border-radius: 20px; cursor: pointer; font-size: 11px; margin-left: 8px;
    font-weight: 600; transition: var(--transition);
}
.lang-switcher button:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* --- Hero --- */
#hero {
    height: 100vh; background: #ffffff;
    display: flex; align-items: center; justify-content: center; text-align: center;
    color: #000000; position: relative; overflow: hidden;
}

#hero::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 10% 20%, rgba(0,113,227,0.03) 0%, transparent 40%);
}

.hero-content { position: relative; z-index: 10; max-width: 900px; padding: 0 20px; }
.hero-content h1 { font-size: 72px; font-weight: 700; letter-spacing: -3px; line-height: 1.1; margin-bottom: 25px; color: #000000; }
.hero-content p { font-size: 20px; color: #555555; margin-bottom: 50px; font-weight: 300; }

.btn {
    display: inline-block; padding: 18px 45px; border-radius: 40px;
    background: var(--accent); color: #fff; text-decoration: none; font-weight: 600;
    font-size: 15px; margin: 10px; transition: var(--transition);
}
.btn-outline { background: transparent; border: 1px solid #000000; color: #000000; }
.btn:hover { transform: translateY(-5px); box-shadow: 0 15px 35px rgba(0,113,227,0.2); }

/* --- 业务板块 --- */
.py-100 { padding: 120px 0; }
.section-header { margin-bottom: 60px; }
.section-header h2 { font-size: 14px; text-transform: uppercase; letter-spacing: 3px; color: var(--accent); margin-bottom: 15px; }
.section-header .line { width: 60px; height: 3px; background: var(--accent); }

.grid-2 { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 80px; align-items: center; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }

.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-top: 40px; }
.stat-item .stat-num { font-size: 32px; font-weight: 700; color: var(--primary); display: block; }
.stat-item p { font-size: 12px; text-transform: uppercase; color: var(--text-muted); }

.about-info-card { background: var(--bg-alt); padding: 50px; border-radius: 30px; }
.about-info-card ul { list-style: none; }
.about-info-card li { margin-bottom: 25px; font-size: 14px; }
.about-info-card strong { display: block; font-size: 11px; text-transform: uppercase; color: var(--text-muted); margin-bottom: 5px; }

.biz-card {
    background: rgba(255,255,255,0.05); padding: 50px 30px; border-radius: 24px;
    border: 1px solid rgba(255,255,255,0.1); transition: var(--transition);
}
.biz-card:hover { background: #fff; color: #000; transform: scale(1.05); box-shadow: 0 40px 80px rgba(0,0,0,0.3); }
.biz-icon { font-size: 40px; margin-bottom: 25px; }
.biz-card h4 { font-size: 20px; margin-bottom: 15px; }
.biz-card p { font-size: 14px; opacity: 0.8; }

.bg-dark { background: #000; }
.text-white { color: #fff; }

/* --- Map --- */
.map-visual {
    height: 400px; background: var(--bg-alt); border-radius: 30px;
    display: flex; align-items: center; justify-content: center;
    border: 1px dashed #ddd; font-weight: 700; color: #ccc; letter-spacing: 5px;
}

/* --- Footer --- */
footer { background: var(--bg-alt); padding: 100px 0 50px; border-top: 1px solid #eee; }
.footer-top { display: flex; justify-content: space-between; padding-bottom: 60px; border-bottom: 1px solid #ddd; }
.footer-brand h2 { font-size: 32px; letter-spacing: 4px; margin-bottom: 10px; }
.footer-bottom { padding-top: 40px; text-align: center; font-size: 12px; color: var(--text-muted); }

/* --- 响应式 --- */
@media (max-width: 992px) {
    .grid-2, .grid-4 { grid-template-columns: 1fr; }
    .hero-content h1 { font-size: 48px; }
    .nav-links { display: none; }
}