/* 水墨动画效果 */
@keyframes inkFlow {
    0% {
        transform: scale(1) translate(0, 0);
        opacity: 0;
    }
    50% {
        opacity: 0.3;
    }
    100% {
        transform: scale(1.5) translate(10px, 10px);
        opacity: 0;
    }
}

/* 传统纹样变换动画 */
@keyframes patternRotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* 渐入效果 */
.fade-in {
    opacity: 0;
    animation: fadeIn 1s ease-in forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 水墨扩散效果 */
.ink-spread {
    position: relative;
    overflow: hidden;
}

.ink-spread::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(0,0,0,0.1) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    animation: inkSpread 2s ease-out infinite;
}

/* 传统纹样动画 */
.pattern-rotate {
    animation: patternRotate 20s linear infinite;
}

/* 卷轴展开效果 */
.scroll-reveal {
    max-height: 0;
    overflow: hidden;
    transition: max-height 1s ease-out;
}

.scroll-reveal.active {
    max-height: 1000px;
}

/* 毛笔书写效果 */
.brush-stroke {
    position: relative;
    display: inline-block;
}

.brush-stroke::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: var(--china-red);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease-out;
}

.brush-stroke:hover::after {
    transform: scaleX(1);
}

/* 图片水墨效果 */
.ink-wash-image {
    filter: contrast(1.1) saturate(0.8);
    transition: filter 0.3s ease;
}

.ink-wash-image:hover {
    filter: contrast(1.2) saturate(0.7);
}

/* 按钮水波纹效果 */
.ripple-button {
    position: relative;
    overflow: hidden;
}

.ripple-button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255,255,255,0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease-out, height 0.6s ease-out;
}

.ripple-button:active::after {
    width: 200px;
    height: 200px;
}

/* 导航菜单悬停效果 */
.menu-hover {
    position: relative;
    padding-bottom: 5px;
}

.menu-hover::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: currentColor;
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.menu-hover:hover::after {
    transform: scaleX(1);
}

/* 卡片翻转效果 */
.flip-card {
    perspective: 1000px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.flip-card:hover .flip-card-inner {
    transform: rotateY(180deg);
}

/* 加载动画 */
.loading {
    width: 50px;
    height: 50px;
    border: 3px solid var(--paper-white);
    border-top-color: var(--china-red);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}