/* demo-style.css */
:root {
    --bg-gradient: radial-gradient(circle at 0% 0%, #fdfbf7 0%, #fff 100%);
    --card-bg: rgba(255, 255, 255, 0.8);
    --text-main: #1d1d1f;
    --text-sub: #86868b;
    --accent: #007AFF;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
    background: #f5f5f7;
    color: var(--text-main);
}

.demo-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 60px 20px;
    text-align: center;
}

h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -1px;
}

p.subtitle {
    font-size: 18px;
    color: var(--text-sub);
    margin-bottom: 50px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 行业卡片网格 */
.industry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 60px;
}

.industry-card {
    background: white;
    border-radius: 20px;
    padding: 30px 20px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.industry-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

/* 选中状态 */
.industry-card.active {
    border-color: var(--accent);
    background: #f0f7ff;
}

.industry-icon {
    font-size: 40px;
    margin-bottom: 15px;
    display: block;
}

.industry-title {
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 5px;
}

.industry-desc {
    font-size: 13px;
    color: var(--text-sub);
}

/* 当前状态提示条 */
.active-status {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    backdrop-filter: blur(10px);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 999;
}

.active-status.show {
    opacity: 1;
}

.cta-section {
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid #e5e5e5;
}

.btn-primary {
    display: inline-block;
    background: #1d1d1f;
    color: white;
    padding: 15px 35px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: bold;
    transition: transform 0.2s;
}

.btn-primary:hover {
    transform: scale(1.05);
}