/* ===== 全局重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== 字体 & 基础 ===== */
html, body {
    height: 100%;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
                 Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* ===== 页面背景（深色 + 渐变） ===== */
body {
    min-height: 100vh;
    color: #e5e7eb;

    background:
        radial-gradient(circle at 20% 20%, rgba(56,189,248,.25), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(167,139,250,.25), transparent 40%),
        linear-gradient(120deg, #020617, #020617);

    padding: 60px 20px;
}

/* ===== 标题 ===== */
h1 {
    text-align: center;
    font-size: 42px;
    margin-bottom: 50px;

    background: linear-gradient(
        90deg,
        #38bdf8,
        #a78bfa,
        #f472b6
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ===== Canvas 背景 ===== */
#bg-canvas {
    position: fixed;
    inset: 0;
    z-index: -2;
}

/* ===== 鼠标光效 ===== */
.cursor-glow {
    position: fixed;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    pointer-events: none;

    background: radial-gradient(
        circle,
        rgba(99,102,241,0.25),
        transparent 70%
    );

    transform: translate(-50%, -50%);
    mix-blend-mode: screen;
    z-index: -1;
}