/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #ffffff;
    --secondary-color: #cccccc;
    --accent-color: #f5f5f5;
    --bg-color: #000000;
    --bg-secondary: #111111;
    --border-color: #333333;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--primary-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
header {
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

header.scrolled {
    padding: 10px 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

nav a {
    position: relative;
    font-weight: 500;
    letter-spacing: 0.5px;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

nav a:hover::after {
    width: 100%;
}

/* 英雄区样式 */
section:nth-child(2) {
    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.8)), url('data:image/svg+xml;base64,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');
    background-size: cover;
    background-position: center;
}

/* 按钮样式 */
button, a {
    transition: all 0.3s ease;
}

button:hover, a:hover {
    transform: translateY(-3px);
}

/* 卡片样式 */
.card {
    background-color: var(--bg-secondary);
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 30px;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5);
    border-color: var(--secondary-color);
}

/* 图标样式 */
.fa {
    transition: all 0.3s ease;
}

/* 项目卡片样式 */
.project-card {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    transition: all 0.5s ease;
}

.project-card:hover .project-overlay {
    opacity: 0.8;
}

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.9));
    opacity: 0.6;
    transition: all 0.5s ease;
}

/* 表单样式 */
input, textarea {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 15px;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.2);
}

/* 页脚样式 */
footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .grid-cols-2, .grid-cols-3 {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

.delay-100 {
    animation-delay: 0.1s;
}

.delay-200 {
    animation-delay: 0.2s;
}

.delay-300 {
    animation-delay: 0.3s;
}

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

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* 自定义类 */
.text-gradient {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.bg-grid {
    background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* 悬停放大效果 */
.hover-scale {
    transition: transform 0.3s ease;
}

.hover-scale:hover {
    transform: scale(1.03);
}

/* 图片样式 */
.img-hover {
    transition: transform 0.5s ease;
}

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

/* 导航栏移动端菜单 */
#mobileMenu {
    transition: all 0.3s ease;
}