/* ========================================
   组件样式 (components.css)
   包含：卡片、按钮、表单、时间轴、标签
   ======================================== */

/* 卡片组件 */
.card {
    background: var(--background-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

/* 按钮基础样式 */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s;
}

.btn:hover {
    background: #e04042;
    color: #fff;
}

/* 次要按钮样式 */
.btn-secondary {
    background: #eee;
    color: #333;
}

.btn-secondary:hover {
    background: #ddd;
    color: #333;
}

/* 表单组件 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.form-control {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.form-control:focus {
    border-color: var(--primary);
    outline: none;
}

/* 时间轴组件 */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: #ddd;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    right: -17px;
    background-color: white;
    border: 4px solid var(--primary);
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

/* 时间轴左侧项目 */
.left {
    left: 0;
}

/* 时间轴右侧项目 */
.right {
    left: 50%;
}

.left::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    right: 30px;
    border: medium solid white;
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent white;
}

.right::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    left: 30px;
    border: medium solid white;
    border-width: 10px 10px 10px 0;
    border-color: transparent white transparent transparent;
}

.right::after {
    left: -16px;
}

/* 时间轴内容区域 */
.content {
    padding: 20px 30px;
    background-color: white;
    position: relative;
    border-radius: 6px;
    box-shadow: var(--shadow);
}

/* 响应式时间轴 */
@media screen and (max-width: 768px) {
    .timeline::after {
        left: 31px;
    }
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    .timeline-item::before {
        left: 60px;
        border: medium solid white;
        border-width: 10px 10px 10px 0;
        border-color: transparent white transparent transparent;
    }
    .left::after, .right::after {
        left: 15px;
    }
    .right {
        left: 0%;
    }
}