.milestones-section {
    background-color: #fff;
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}



.milestones-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, var(--background-color), transparent);
    z-index: 1;
}

.milestones-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 2rem 0;
    position: relative;
    overflow: hidden;
}

.milestones-scroll {
    width: 100%;
    overflow-x: auto;
    padding: 4rem 2rem;
    scrollbar-width: none;
    /* Firefox */
    -ms-overflow-style: none;
    /* IE and Edge */
}

.milestones-scroll::-webkit-scrollbar {
    display: none;
    /* Chrome, Safari, Opera */
}

.milestones-track {
    display: flex;
    min-width: max-content;
    gap: 3rem;
    padding: 1rem 5%;
    position: relative;
}

.milestones-track::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    height: 4px;
    background: var(--gradient);
    transform: translateY(-50%);
    z-index: 1;
}

.milestone-item {
    position: relative;
    width: 300px;
    padding-top: 2rem;
    z-index: 2;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.milestone-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.milestone-dot {
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    cursor: pointer;
    transition: all 0.3s ease;
}

.milestone-dot::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    border-radius: 50%;
    opacity: 0.3;
    animation: pulse 2s infinite;
}

.milestone-card {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transform-origin: top center;
    transform: perspective(1000px) rotateX(-10deg);
    transition: all 0.3s ease;
    opacity: 0.8;
    text-align: center;
}

.milestone-item:hover .milestone-dot {
    transform: translate(-50%, -50%) scale(1.5);
    background: var(--secondary-color);
}

.milestone-item:hover .milestone-card {
    transform: perspective(1000px) rotateX(0);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    opacity: 1;
}

.milestone-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient);
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    box-shadow: 0 10px 20px rgba(240, 98, 146, 0.2);
    transition: all 0.3s ease;
}

.milestone-item:hover .milestone-icon {
    transform: scale(1.1) rotate(360deg);
    box-shadow: 0 15px 30px rgba(240, 98, 146, 0.3);
}

.milestone-year {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.milestone-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--text-color);
}



.milestones-nav {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 2rem;
    pointer-events: none;
    z-index: 3;
}

.milestone-nav-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    pointer-events: auto;
    transition: all 0.3s ease;
}

.milestone-nav-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.3;
    }

    70% {
        transform: scale(2);
        opacity: 0;
    }

    100% {
        transform: scale(2.5);
        opacity: 0;
    }
}

@media (max-width: 768px) {
    .milestones-section {
        padding: 4rem 0;
    }

    .milestones-container {
        padding: 1rem 0;
    }

    .milestones-scroll {
        padding: 2rem 1rem;
        -webkit-overflow-scrolling: touch;
        /* 增加iOS滚动流畅度 */
    }

    .milestones-track {
        gap: 1.5rem;
        padding: 1rem 1rem;
    }

    .milestone-item {
        width: 280px;
        padding-top: 1.5rem;
    }

    .milestone-card {
        padding: 1.2rem;
        transform: none;
    }

    .milestone-icon {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
        margin-bottom: 1rem;
    }

    .milestone-year {
        font-size: 1rem;
    }

    .milestone-title {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }

 

    .milestones-nav {
        position: static;
        transform: none;
        margin-top: 1rem;
        padding: 0;
        justify-content: center;
        gap: 1rem;
    }

    .milestone-nav-btn {
        width: 40px;
        height: 40px;
        background: var(--primary-color);
        color: white;
        opacity: 0.8;
    }

    .milestone-nav-btn:hover {
        opacity: 1;
        transform: scale(1.05);
    }

    .milestone-dot {
        width: 16px;
        height: 16px;
    }

    .milestone-dot::before {
        animation: none;
        /* 移动端禁用脉冲动画以提升性能 */
    }

    .milestones-track::before {
        height: 3px;
        /* 减小时间线的粗细 */
    }

    /* 优化触摸滑动体验 */
    .milestones-scroll {
        cursor: grab;
        scroll-snap-type: x mandatory;
    }

    .milestone-item {
        scroll-snap-align: center;
    }

    /* 添加滑动提示 */
    .milestones-container::after {
        content: '';
        position: absolute;
        top: 0;
        right: 0;
        width: 50px;
        height: 100%;
        background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.9));
        pointer-events: none;
        z-index: 4;
    }
}

/* 针对更小屏幕的优化 */
@media (max-width: 480px) {
    .milestone-item {
        width: 260px;
    }

    .milestone-card {
        padding: 1rem;
    }


}