/* ===== 全局重置与基础 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #050508;
    --bg-secondary: #0a0a12;
    --cyan: #00ffcc;
    --blue: #0080ff;
    --magenta: #ff00ff;
    --white: #ffffff;
    --gray: #8899aa;
    --card-bg: rgba(10, 15, 30, 0.6);
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
    color: var(--white);
    line-height: 1.6;
}

/* ===== 粒子背景 Canvas ===== */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    pointer-events: none;
}

/* ===== 扫描线纹理 ===== */
.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    opacity: 0.03;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 255, 204, 0.1) 2px,
        rgba(0, 255, 204, 0.1) 4px
    );
    animation: scanlineMove 8s linear infinite;
}

/* ===== 主容器 ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 60px 20px;
    position: relative;
    z-index: 1;
}

/* ===== 头部 ===== */
.header {
    text-align: center;
    margin-bottom: 80px;
}

.title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 800;
    letter-spacing: 0.1em;
    background: linear-gradient(135deg, var(--cyan) 0%, var(--blue) 50%, var(--magenta) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    text-transform: uppercase;
}

.title.glitch::before,
.title.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.title.glitch::before {
    animation: glitch-1 2s infinite linear alternate-reverse;
    clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
    color: var(--cyan);
    -webkit-text-fill-color: var(--cyan);
}

.title.glitch::after {
    animation: glitch-2 3s infinite linear alternate-reverse;
    clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
    color: var(--magenta);
    -webkit-text-fill-color: var(--magenta);
}

.subtitle {
    font-size: 1.2rem;
    color: var(--gray);
    margin-top: 15px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
}

/* ===== 卡片容器 ===== */
.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 40px;
    perspective: 1000px;
}

/* ===== 响应式适配 ===== */
@media (max-width: 768px) {
    .container {
        padding: 40px 15px;
    }

    .header {
        margin-bottom: 50px;
    }

    .cards-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (min-width: 769px) and (max-width: 1200px) {
    .cards-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1201px) {
    .cards-container {
        grid-template-columns: repeat(3, 1fr);
    }
}