/* 首屏居中文字 */
.hero {
    width: 100%; height: 80vh; min-height: 600px; 
    padding-top: 72px; box-sizing: border-box;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    pointer-events: none; /* 让鼠标穿透文字操作3D */
}

.hero-text { text-align: center; }
.hero-text h1 { font-size: 4rem; font-weight: 800; letter-spacing: 6px; margin: 0 0 20px 0; }
.hero-text p { font-size: 1.2rem; color: var(--text-muted); letter-spacing: 2px; margin: 0 auto; max-width: 600px; line-height: 1.6; }

/* 核心功能卡片区 */
.features-section {
    padding: 80px 20px; max-width: 1200px; margin: 0 auto;
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px;
    pointer-events: auto;
}

.feature-card {
    background: #ffffff; border: 1px solid rgba(0, 0, 0, 0.04);
    border-radius: 20px; padding: 40px 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.feature-card:hover { transform: translateY(-8px); box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06); }

.card-icon-dot { width: 48px; height: 48px; border-radius: 12px; margin-bottom: 20px; display: flex; align-items: center; justify-content: center; }
.bg-green { background: rgba(16, 185, 129, 0.1); }
.bg-blue { background: rgba(59, 130, 246, 0.1); }
.bg-purple { background: rgba(138, 43, 226, 0.1); }

.feature-card h3 { font-size: 1.3rem; margin: 0 0 15px 0; }
.feature-card p { font-size: 0.95rem; line-height: 1.6; color: var(--text-muted); margin: 0; }

footer { text-align: center; padding: 40px 20px; border-top: 1px solid rgba(0,0,0,0.05); color: var(--text-muted); font-size: 0.85rem; }

@media (max-width: 900px) { .features-section { grid-template-columns: 1fr; } .hero-text h1 { font-size: 2.5rem; } }