/* ==============================
   项目16：Target Cursor Effect
   目标光标效果
   ============================== */

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

/* 页面主体 - 黑色背景 */
body {
    font-family: 'Helvetica Neue', Arial, 'Microsoft YaHei', sans-serif;
    background: #000; /* 纯黑色背景 */
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    cursor: none; /* 隐藏默认光标 */
}

/* ========== 容器样式 ========== */
.container {
    text-align: center;
    color: #fff;
    padding: 40px;
}

.title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.subtitle {
    font-size: 18px;
    font-weight: 300;
    opacity: 0.6;
    margin-bottom: 60px;
    letter-spacing: 1px;
}

/* ========== 按钮容器 ========== */
.buttons-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
}

/* ========== 按钮基础样式 ========== */
.cursor-target {
    padding: 18px 50px;
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    cursor: none; /* 重要：保持自定义光标 */
    transition: all 0.3s ease;
    outline: none;
    position: relative;
    overflow: hidden;
}

/* 按钮悬停效果 */
.cursor-target:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
}

/* 按钮点击效果 */
.cursor-target:active {
    transform: scale(0.98);
}

/* ========== 主按钮 ========== */
.btn-primary {
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.05);
}

.btn-primary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.2);
}

/* ========== 次按钮 ========== */
.btn-secondary {
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.7);
    box-shadow: 0 0 25px rgba(255, 255, 255, 0.15);
}

/* ========== 第三按钮 ========== */
.btn-tertiary {
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-tertiary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

/* ========== 自定义光标样式 ========== */

/* 光标容器 */
.target-cursor-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 0;
    pointer-events: none; /* 让鼠标事件穿透 */
    z-index: 9999;
    mix-blend-mode: difference; /* 差值混合模式 */
    transform: translate(-50%, -50%); /* 居中定位 */
}

/* 中心点 */
.target-cursor-dot {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 4px;
    height: 4px;
    background: #fff; /* 白色 */
    border-radius: 50%;
    transform: translate(-50%, -50%);
    will-change: transform; /* 性能优化 */
}

/* 四个角 */
.target-cursor-corner {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 12px;
    height: 12px;
    border: 3px solid #fff; /* 白色边框 */
    will-change: transform;
}

/* 左上角 */
.corner-tl {
    transform: translate(-150%, -150%);
    border-right: none;
    border-bottom: none;
}

/* 右上角 */
.corner-tr {
    transform: translate(50%, -150%);
    border-left: none;
    border-bottom: none;
}

/* 右下角 */
.corner-br {
    transform: translate(50%, 50%);
    border-left: none;
    border-top: none;
}

/* 左下角 */
.corner-bl {
    transform: translate(-150%, 50%);
    border-right: none;
    border-top: none;
}

/* ==============================
   响应式设计
   ============================== */

/* 平板横屏 (≤ 1199px) */
@media (max-width: 1199px) {
    .title {
        font-size: 40px;
    }

    .subtitle {
        font-size: 16px;
    }

    .buttons-container {
        gap: 25px;
    }

    .cursor-target {
        padding: 16px 40px;
        font-size: 17px;
    }
}

/* 平板竖屏 (≤ 768px) */
@media (max-width: 768px) {
    .container {
        padding: 30px 20px;
    }

    .title {
        font-size: 32px;
    }

    .subtitle {
        font-size: 15px;
        margin-bottom: 50px;
    }

    .buttons-container {
        flex-direction: column;
        gap: 20px;
    }

    .cursor-target {
        padding: 15px 40px;
        font-size: 16px;
        width: 100%;
        max-width: 300px;
    }
}

/* 手机屏幕 (≤ 576px) */
@media (max-width: 576px) {
    .title {
        font-size: 28px;
    }

    .subtitle {
        font-size: 14px;
        margin-bottom: 40px;
    }

    .cursor-target {
        padding: 14px 35px;
        font-size: 15px;
    }
}

/* 小屏手机 (≤ 400px) */
@media (max-width: 400px) {
    .title {
        font-size: 24px;
    }

    .cursor-target {
        padding: 12px 30px;
        font-size: 14px;
    }
}