:root {
    --bg-color: #050505;
    --card-bg: rgba(20, 20, 20, 0.7);
    --neon-blue: #00f3ff;
    --neon-purple: #bc13fe;
    --text-main: #e0e0e0;
    --text-sub: #888;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Noto Sans SC', sans-serif;
    overflow-x: hidden;
    min-height: 100vh;
}

/* 背景画布 */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.6;
}

/* 导航栏 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 5%;
    backdrop-filter: blur(10px);
    background: rgba(5, 5, 5, 0.5);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    color: var(--neon-blue);
    text-shadow: 0 0 10px var(--neon-blue);
    letter-spacing: 2px;
}

.logo span {
    color: #fff;
    text-shadow: none;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-sub);
    text-decoration: none;
    font-size: 0.9rem;
    transition: 0.3s;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--neon-blue);
    text-shadow: 0 0 8px var(--neon-blue);
}

/* 英雄区 & 故障文字 */
.hero {
    text-align: center;
    padding: 8rem 2rem 4rem;
}

.glitch {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(2rem, 5vw, 4rem);
    position: relative;
    color: #fff;
    animation: glitch-skew 4s infinite linear alternate-reverse;
}

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

.glitch::before {
    left: 2px;
    text-shadow: -2px 0 var(--neon-purple);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim 5s infinite linear alternate-reverse;
}

.glitch::after {
    left: -2px;
    text-shadow: -2px 0 var(--neon-blue), 2px 2px var(--neon-purple);
    clip: rect(20px, 450px, 90px, 0);
    animation: glitch-anim2 5s infinite linear alternate-reverse;
}

.subtitle {
    margin-top: 1rem;
    color: var(--text-sub);
    font-size: 1.2rem;
    letter-spacing: 4px;
}

/* 卡片网格 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    padding-bottom: 4rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
    backdrop-filter: blur(10px);
    opacity: 0;
    /* 初始隐藏，JS控制显示 */
    transform: translateY(30px);
}

.card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.15);
    border-color: var(--neon-blue);
}

.card-img {
    height: 200px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.card-img::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to top, var(--card-bg), transparent);
}

.card-content {
    padding: 1.5rem;
}

.tag {
    font-size: 0.7rem;
    color: var(--neon-purple);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: bold;
}

.card-content h2 {
    margin: 0.8rem 0;
    font-size: 1.4rem;
    line-height: 1.4;
}

.card-content p {
    color: var(--text-sub);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-sub);
}

.read-more {
    color: var(--neon-blue);
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s;
}

.read-more:hover {
    text-shadow: 0 0 8px var(--neon-blue);
}

/* 动画关键帧 */
@keyframes glitch-anim {
    0% {
        clip: rect(42px, 9999px, 44px, 0);
        transform: skew(0.5deg);
    }

    20% {
        clip: rect(12px, 9999px, 64px, 0);
        transform: skew(-0.5deg);
    }

    40% {
        clip: rect(82px, 9999px, 94px, 0);
        transform: skew(0.2deg);
    }

    60% {
        clip: rect(22px, 9999px, 34px, 0);
        transform: skew(-0.2deg);
    }

    80% {
        clip: rect(62px, 9999px, 74px, 0);
        transform: skew(0.8deg);
    }

    100% {
        clip: rect(12px, 9999px, 24px, 0);
        transform: skew(-0.8deg);
    }
}

@keyframes glitch-anim2 {
    0% {
        clip: rect(65px, 9999px, 100px, 0);
        transform: skew(0.2deg);
    }

    20% {
        clip: rect(25px, 9999px, 50px, 0);
        transform: skew(-0.2deg);
    }

    40% {
        clip: rect(15px, 9999px, 70px, 0);
        transform: skew(0.5deg);
    }

    60% {
        clip: rect(55px, 9999px, 80px, 0);
        transform: skew(-0.5deg);
    }

    80% {
        clip: rect(35px, 9999px, 60px, 0);
        transform: skew(0.1deg);
    }

    100% {
        clip: rect(75px, 9999px, 90px, 0);
        transform: skew(-0.1deg);
    }
}

@keyframes glitch-skew {
    0% {
        transform: skew(0deg);
    }

    20% {
        transform: skew(-0.5deg);
    }

    40% {
        transform: skew(0.5deg);
    }

    60% {
        transform: skew(-0.2deg);
    }

    80% {
        transform: skew(0.2deg);
    }

    100% {
        transform: skew(0deg);
    }
}