/* ===== UI 美化增强样式 ===== */

/* 渐变背景增强 */
.hero-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-size: 200% 200%;
    animation: gradient-shift 15s ease infinite;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* 毛玻璃效果增强 */
.header {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px) saturate(180%) !important;
    -webkit-backdrop-filter: blur(20px) saturate(180%) !important;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3) !important;
}

/* 导航链接美化 */
.nav-link {
    position: relative;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-lg) !important;
    transition: all var(--transition-base) !important;
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--primary-gradient);
    opacity: 0;
    border-radius: var(--radius-lg);
    transition: opacity var(--transition-base);
    z-index: -1;
}

.nav-link:hover::before,
.nav-link.active::before {
    opacity: 0.08;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary) !important;
    transform: translateY(-1px);
}

/* Hero 卡片美化 */
.hero-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl), 0 0 60px rgba(37, 99, 235, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.5);
    overflow: hidden;
    transition: all var(--transition-slow);
}

.hero-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-xl), 0 0 80px rgba(37, 99, 235, 0.25);
}

/* 聊天气泡美化 */
.chat-demo .message {
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.chat-demo .bubble {
    background: var(--bg-secondary);
    padding: 0.875rem 1.125rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    font-size: 0.938rem;
    line-height: 1.5;
    max-width: 85%;
    transition: all var(--transition-base);
}

.chat-demo .message:hover .bubble {
    box-shadow: var(--shadow-md);
    transform: translateX(2px);
}

.chat-demo .message.agent .bubble {
    background: var(--primary-gradient);
    color: white;
}

/* 统计卡片美化 */
.stat-card {
    background: white;
    padding: 2rem 1.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-100);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-slow);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    border-color: rgba(37, 99, 235, 0.2);
}

/* 特性卡片美化 */
.feature-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-100);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl), 0 0 60px rgba(37, 99, 235, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.1));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
    background: var(--primary-gradient);
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-glow);
}

.feature-icon img {
    width: 40px;
    height: 40px;
    transition: filter var(--transition-base);
}

.feature-card:hover .feature-icon img {
    filter: brightness(0) invert(1);
}

/* 产品卡片美化 */
.product-card {
    background: white;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-100);
}

.product-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.product-image {
    position: relative;
    overflow: hidden;
}

.product-image img {
    transition: transform var(--transition-slow);
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

/* 合作伙伴 Logo 墙美化 */
.partner-logo {
    filter: grayscale(100%) opacity(0.6);
    transition: all var(--transition-base);
}

.partner-logo:hover {
    filter: grayscale(0%) opacity(1);
    transform: scale(1.05);
}

/* 页脚美化 */
.footer {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 10s ease-in-out infinite;
}

.footer::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 12s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(-10px, 10px); }
    50% { transform: translate(10px, -10px); }
    75% { transform: translate(-10px, -10px); }
}

/* 按钮增强 */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

/* 动画增强 */
[data-aos] {
    opacity: 0;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-aos].aos-animate {
    opacity: 1;
}

/* 移动端优化 */
@media (max-width: 768px) {
    .hero-card {
        box-shadow: var(--shadow-lg);
    }
    
    .stat-card,
    .feature-card,
    .product-card {
        padding: 1.5rem 1.25rem;
    }
    
    .nav-link::before {
        display: none;
    }
}

/* 加载动画 */
@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

.loading {
    background: linear-gradient(90deg, var(--gray-100) 0%, var(--gray-200) 50%, var(--gray-100) 100%);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, #7c3aed 100%);
}