/* 自定义样式 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --brand-blue: #1a56db;
    --brand-gray: #f8fafc;
    --brand-dark: #0f172a;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    scroll-behavior: smooth;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 网格背景图案 */
.bg-grid-pattern {
    background-image: 
        linear-gradient(rgba(0,0,0,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,0,0,0.05) 1px, transparent 1px);
    background-size: 50px 50px;
}

/* 自定义动画 */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 导航栏样式增强 */
.nav-link {
    position: relative;
    transition: all 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 50%;
    background-color: var(--brand-blue);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* 滚动指示器 */
.scroll-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(to right, var(--brand-blue), #8b5cf6);
    transform-origin: left;
    z-index: 1000;
}

/* Hero区域增强 */
.hero-bg {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 卡片悬停效果 */
.card-hover {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-hover:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* 按钮样式增强 */
.btn-primary {
    background: linear-gradient(135deg, var(--brand-blue), #3b82f6);
    border: none;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

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

/* 文本渐变 */
.text-gradient {
    background: linear-gradient(135deg, var(--brand-blue), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 视差滚动效果 */
.parallax {
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

/* 加载动画 */
.loading-spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--brand-blue);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
        line-height: 1.2;
    }
    
    .card-hover:hover {
        transform: translateY(-4px) scale(1.01);
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--brand-blue);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #1445a0;
}

/* 表单样式增强 */
.form-input {
    transition: all 0.3s ease;
}

.form-input:focus {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(26, 86, 219, 0.15);
}

/* 图标动画 */
.icon-bounce {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        animation-timing-function: cubic-bezier(0.215, 0.610, 0.355, 1.000);
        transform: translate3d(0,0,0);
    }
    40%, 43% {
        animation-timing-function: cubic-bezier(0.755, 0.050, 0.855, 0.060);
        transform: translate3d(0, -8px, 0);
    }
    70% {
        animation-timing-function: cubic-bezier(0.755, 0.050, 0.855, 0.060);
        transform: translate3d(0, -4px, 0);
    }
    90% {
        transform: translate3d(0,-1px,0);
    }
}

/* 淡入观察动画 */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 产品卡片特殊效果 */
.product-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.product-card:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-5px);
}

/* 打字机效果 */
.typewriter {
    overflow: hidden;
    border-right: 2px solid var(--brand-blue);
    white-space: nowrap;
    animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink-caret {
    from, to { border-color: transparent; }
    50% { border-color: var(--brand-blue); }
}

/* Hero 背景样式 */
.hero-background {
    position: relative;
    background: linear-gradient(135deg, #ffffff 0%, #fafafa 100%);
}

.hero-gradient {
    background: transparent;
    opacity: 1;
}

.hero-decoration {
    /* 移除整体透明度设置，让子元素独立控制 */
}


.hero-decoration::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(45deg, transparent 46px, rgba(0, 0, 0, 0.03) 47px, rgba(0, 0, 0, 0.03) 50px, transparent 51px),
        linear-gradient(-45deg, transparent 46px, rgba(0, 0, 0, 0.025) 47px, rgba(0, 0, 0, 0.025) 50px, transparent 51px);
    background-size: 120px 120px;
    background-position: 0 0, 60px 60px;
    z-index: 1;
}

@keyframes breathe {
    0%, 100% {
        opacity: 0.4;
    }
    50% {
        opacity: 0.7;
    }
}

.hero-particles {
    background-image: 
        radial-gradient(1px 1px at 80px 60px, rgba(99, 102, 241, 0.15), transparent),
        radial-gradient(2px 2px at 160px 120px, rgba(139, 92, 246, 0.12), transparent),
        radial-gradient(1px 1px at 240px 40px, rgba(99, 102, 241, 0.15), transparent),
        radial-gradient(1px 1px at 320px 140px, rgba(139, 92, 246, 0.12), transparent);
    background-repeat: repeat;
    background-size: 400px 200px;
    animation: subtleBreath 8s ease-in-out infinite;
}

@keyframes subtleBreath {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 0.9;
    }
}



/* 响应式调整 */
@media (max-width: 768px) {
    .hero-particles {
        background-size: 300px 150px;
    }
    
    .hero-decoration::after {
        background-size: 100px 100px;
        background-position: 0 0, 50px 50px;
    }
    
}