/* ===== 滚动淡入动画 ===== */
[data-aos] { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
[data-aos].visible { opacity: 1; transform: translateY(0); }

.feature-card:nth-child(1) { transition-delay: 0s; }
.feature-card:nth-child(2) { transition-delay: 0.07s; }
.feature-card:nth-child(3) { transition-delay: 0.14s; }
.feature-card:nth-child(4) { transition-delay: 0.21s; }
.feature-card:nth-child(5) { transition-delay: 0.28s; }
.feature-card:nth-child(6) { transition-delay: 0.35s; }
.feature-card:nth-child(7) { transition-delay: 0.42s; }
.feature-card:nth-child(8) { transition-delay: 0.49s; }

.tech-card:nth-child(1) { transition-delay: 0s; }
.tech-card:nth-child(2) { transition-delay: 0.1s; }
.tech-card:nth-child(3) { transition-delay: 0.2s; }
.tech-card:nth-child(4) { transition-delay: 0.3s; }

/* ===== Hero 动画 ===== */
.hero-text { animation: slideInLeft 0.8s ease forwards; }
.hero-visual { animation: slideInRight 0.8s ease forwards; animation-delay: 0.2s; opacity: 0; }
@keyframes slideInLeft { from { opacity: 0; transform: translateX(-30px); } to { opacity: 1; transform: translateX(0); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(30px); } to { opacity: 1; transform: translateX(0); } }

/* ===== 发光脉冲 ===== */
.btn-glow { animation: glow 2.4s ease-in-out infinite; }
@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px rgba(0, 185, 107, 0.3); }
  50% { box-shadow: 0 0 30px rgba(0, 185, 107, 0.5), 0 0 60px rgba(0, 185, 107, 0.2); }
}

/* ===== 浮动 ===== */
.hero-visual .app-window { animation: float 6s ease-in-out infinite; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }