/* 青岛瑞境智能科技有限公司 - 通用样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #00d4ff;
    --primary-dark: #0099cc;
    --accent: #7c3aed;
    --bg-dark: #0a192f;
    --bg-card: #112240;
    --text-light: #ccd6f6;
    --text-muted: #8892b0;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Roboto', 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background:
        radial-gradient(circle at 0% 0%, rgba(0, 212, 255, 0.18), transparent 55%),
        radial-gradient(circle at 100% 30%, rgba(124, 58, 237, 0.16), transparent 55%),
        var(--bg-dark);
    color: var(--text-light);
    line-height: 1.6;
    min-height: 100vh;
}

html {
    scroll-behavior: smooth;
}

main {
    padding-top: 70px;
    min-height: calc(100vh - 70px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    font-size: 2.2rem;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.08em;
}

.section-title p {
    color: var(--text-muted);
    font-size: 1rem;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-size: 0.9rem;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

/* 页脚 */
.site-footer {
    background: var(--bg-card);
    padding: 48px 24px 24px;
    margin-top: 80px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    color: var(--primary);
    margin-bottom: 16px;
    font-size: 1rem;
}

.footer-section p,
.footer-section a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    line-height: 1.8;
}

.footer-section a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    font-size: 0.85rem;
}