/**
 * 雅致青绿 - 综合增强样式
 * 包含：3D 倾斜、光晕扩散、滚动动画、流云背景、进度条、转场动画等
 */

/* ===== 1. 动态流云背景 ===== */
.elegant-clouds-bg {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0.06;
    overflow: hidden;
}

.cloud-layer {
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background: 
        radial-gradient(ellipse at 30% 20%, rgba(255, 255, 255, 0.8) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 40%, rgba(255, 255, 255, 0.6) 0%, transparent 45%),
        radial-gradient(ellipse at 50% 60%, rgba(255, 255, 255, 0.7) 0%, transparent 55%),
        radial-gradient(ellipse at 20% 80%, rgba(255, 255, 255, 0.5) 0%, transparent 40%);
    filter: blur(30px);
    animation: cloud-drift 120s linear infinite;
}

.cloud-layer:nth-child(2) {
    animation-duration: 180s;
    animation-direction: reverse;
    opacity: 0.5;
}

@keyframes cloud-drift {
    0% {
        transform: rotate(0deg) translateX(0);
    }
    100% {
        transform: rotate(360deg) translateX(50px);
    }
}

/* ===== 2. 文章卡片 3D 倾斜效果（已移除） ===== */
/* 保持简单样式 */
.post-card-elegant,
.mobile-post-card {
    transition: all 0.3s ease;
}

.post-card-elegant:hover,
.mobile-post-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

/* ===== 3. 按钮光晕扩散动画（已移除） ===== */
/* 保持简单样式 */
.post-read-more,
.submit-btn,
.mobile-submit-btn,
.search-submit-btn {
    position: relative;
}

.post-read-more:hover,
.submit-btn:hover,
.mobile-submit-btn:hover,
.search-submit-btn:hover {
    opacity: 0.9;
}

/* ===== 4. 链接下划线展开效果 ===== */
.post-title-elegant a,
.post-detail-title a,
.mobile-post-title a,
.link-card,
.footer-links a,
.social-links a {
    position: relative;
    text-decoration: none;
}

.post-title-elegant a::after,
.post-detail-title a::after,
.mobile-post-title a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: linear-gradient(90deg, var(--accent-color), transparent);
    transition: width 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.post-title-elegant a:hover::after,
.post-detail-title a:hover::after,
.mobile-post-title a:hover::after {
    width: 100%;
}

/* ===== 5. 滚动动画 - 淡入上浮 ===== */
@keyframes fade-in-up {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), 
                transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 阶梯式延迟 */
.animate-on-scroll[data-delay="1"] { transition-delay: 0.1s; }
.animate-on-scroll[data-delay="2"] { transition-delay: 0.2s; }
.animate-on-scroll[data-delay="3"] { transition-delay: 0.3s; }
.animate-on-scroll[data-delay="4"] { transition-delay: 0.4s; }

/* ===== 6. 图片懒加载渐显效果 ===== */
img {
    transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
                filter 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

img[loading="lazy"]:not([src]) {
    opacity: 0;
    filter: blur(10px);
}

img[loading="lazy"][src] {
    opacity: 1;
    filter: blur(0);
}

/* ===== 7. 中式花边纹样边框 ===== */
.post-card-elegant,
.mobile-post-card,
.link-card,
.apply-form-wrapper,
.mobile-apply-form-wrapper {
    position: relative;
}

.post-card-elegant::before,
.mobile-post-card::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    bottom: 8px;
    border: 1px solid rgba(107, 144, 128, 0.06);
    pointer-events: none;
    background: 
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 8px,
            rgba(107, 144, 128, 0.03) 8px,
            rgba(107, 144, 128, 0.03) 16px
        );
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.post-card-elegant:hover::before,
.mobile-post-card:hover::before {
    opacity: 1;
}

/* ===== 8. 平滑滚动和自定义曲线 ===== */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

/* 自定义滚动曲线 */
.smooth-scroll {
    scroll-behavior: smooth;
}

/* ===== 9. 滚动进度条 ===== */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, 
        rgba(90, 138, 122, 0.3) 0%, 
        var(--accent-color) 50%, 
        rgba(90, 138, 122, 0.3) 100%);
    z-index: 1000;
    transition: width 0.1s linear;
    box-shadow: 0 0 10px rgba(90, 138, 122, 0.3);
}

/* ===== 10. 回到顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(107, 144, 128, 0.15);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(90, 138, 122, 0.3);
}

.back-to-top i {
    font-size: 1.2rem;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.back-to-top:hover i {
    transform: translateY(-2px);
}

/* ===== 11. PJAX 转场动画 ===== */
/* 淡入淡出效果 */
body.pjax-transition {
    transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

body.pjax-loading {
    opacity: 0;
}

/* 滑动切换效果 */
.pjax-slide-enter {
    animation: pjax-slide-in 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.pjax-slide-leave {
    animation: pjax-slide-out 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes pjax-slide-in {
    0% {
        opacity: 0;
        transform: translateX(30px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pjax-slide-out {
    0% {
        opacity: 1;
        transform: translateX(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-30px);
    }
}

/* 缩放切换效果 */
.pjax-zoom-enter {
    animation: pjax-zoom-in 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.pjax-zoom-leave {
    animation: pjax-zoom-out 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes pjax-zoom-in {
    0% {
        opacity: 0;
        transform: scale(0.95);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pjax-zoom-out {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(1.05);
    }
}

/* ===== 12. 骨架屏加载 ===== */
.skeleton {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.4) 25%,
        rgba(255, 255, 255, 0.6) 50%,
        rgba(255, 255, 255, 0.4) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: 4px;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-title {
    height: 24px;
    width: 60%;
    margin-bottom: 12px;
}

.skeleton-meta {
    height: 14px;
    width: 40%;
    margin-bottom: 16px;
}

.skeleton-excerpt {
    height: 16px;
    width: 100%;
    margin-bottom: 8px;
}

.skeleton-excerpt:last-child {
    width: 80%;
}

/* ===== 13. 搜索弹窗增强 ===== */
.search-modal {
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.search-box {
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
                box-shadow 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.search-modal.active .search-box {
    transform: scale(1) translateY(0);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.15);
}

/* ===== 14. 评论区展开动画 ===== */
.comments-section {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.6s cubic-bezier(0.16, 1, 0.3, 1), 
                opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.comments-section.expanded {
    max-height: 5000px;
    opacity: 1;
}

/* ===== 15. 夜间模式平滑过渡 ===== */
body,
body * {
    transition: background-color 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
                color 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
                border-color 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== 16. 滚动百分比显示 ===== */
.scroll-percentage {
    position: fixed;
    bottom: 100px;
    right: 55px;
    font-size: 0.75rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: 6px 12px;
    border-radius: 12px;
    border: 1px solid rgba(107, 144, 128, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 998;
    font-variant-numeric: tabular-nums;
}

.scroll-percentage.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ===== 17. 移动端适配 ===== */
@media (max-width: 768px) {
    .back-to-top {
        bottom: 100px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
    
    .scroll-percentage {
        bottom: 150px;
        right: 30px;
        font-size: 0.7rem;
        padding: 4px 10px;
    }
    
    .post-card-elegant:hover,
    .mobile-post-card:hover {
        transform: perspective(1000px) rotateX(1deg) rotateY(-1deg) translateY(-2px);
    }
    
    .cloud-layer {
        animation-duration: 180s;
    }
}

/* ===== 18. 性能优化 ===== */
.post-card-elegant,
.mobile-post-card,
.back-to-top,
.scroll-percentage,
.reading-progress-bar {
    will-change: transform, opacity;
}

/* ===== 19. 弹性滚动效果 ===== */
@supports (scroll-behavior: smooth) {
    html {
        scroll-behavior: smooth;
    }
}

/* 滚动到顶部/底部的弹性效果 */
@keyframes elastic-bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.reached-top,
.reached-bottom {
    animation: elastic-bounce 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}