/* ============================================
   个人展示网站 - 动画与特效
   风格：科技风 + IOS26高级质感
   ============================================ */

/* ============================================
   页面加载动画
   ============================================ */
.page-loader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ============================================
   元素入场动画
   ============================================ */
.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.fade-in-down {
    animation: fadeInDown 0.6s ease forwards;
}

.fade-in-left {
    animation: fadeInLeft 0.6s ease forwards;
}

.fade-in-right {
    animation: fadeInRight 0.6s ease forwards;
}

.scale-in {
    animation: scaleIn 0.5s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 延迟动画 */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }
.delay-6 { animation-delay: 0.6s; }

/* 初始状态（需要配合JS添加动画类） */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ============================================
   悬停效果
   ============================================ */

/* 科技风渐变边框效果 */
.gradient-border {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    z-index: 1;
}

.gradient-border::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-primary);
    border-radius: calc(var(--radius-lg) + 2px);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gradient-border:hover::before {
    opacity: 1;
}

/* 发光效果 */
.glow-effect {
    transition: box-shadow 0.3s ease;
}

.glow-effect:hover {
    box-shadow: 0 0 30px rgba(0, 122, 255, 0.4),
                0 0 60px rgba(0, 122, 255, 0.2);
}

[data-theme="dark"] .glow-effect:hover {
    box-shadow: 0 0 30px rgba(10, 132, 255, 0.5),
                0 0 60px rgba(10, 132, 255, 0.3);
}

/* 脉冲动画 */
.pulse {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

/* 闪烁效果 */
.shimmer {
    position: relative;
    overflow: hidden;
}

.shimmer::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    100% {
        left: 100%;
    }
}

/* ============================================
   按钮交互
   ============================================ */
.btn-interactive {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn-interactive::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn-interactive:active::before {
    width: 300px;
    height: 300px;
}

/* 按钮点击波纹效果 */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple-effect {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: scale(0);
    animation: ripple-animation 0.6s ease-out;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* ============================================
   卡片悬停效果
   ============================================ */
.card-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-lift:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.card-scale {
    transition: transform 0.3s ease;
}

.card-scale:hover {
    transform: scale(1.02);
}

/* 卡片光晕边框 */
.card-glow {
    position: relative;
}

.card-glow::after {
    content: '';
    position: absolute;
    inset: -1px;
    background: var(--gradient-primary);
    border-radius: calc(var(--radius-lg) + 1px);
    z-index: -1;
    opacity: 0;
    filter: blur(8px);
    transition: opacity 0.3s ease;
}

.card-glow:hover::after {
    opacity: 0.5;
}

/* ============================================
   文字效果
   ============================================ */

/* 渐变文字 */
.text-gradient {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 文字发光 */
.text-glow {
    text-shadow: 0 0 20px rgba(0, 122, 255, 0.5);
}

[data-theme="dark"] .text-glow {
    text-shadow: 0 0 20px rgba(10, 132, 255, 0.6);
}

/* 打字机效果 */
.typewriter {
    overflow: hidden;
    border-right: 2px solid var(--primary);
    white-space: nowrap;
    animation: typing 3s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
    from { width: 0 }
    to { width: 100% }
}

@keyframes blink-caret {
    from, to { border-color: transparent }
    50% { border-color: var(--primary) }
}

/* ============================================
   背景动画
   ============================================ */

/* 粒子背景 */
.particles-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: float-particle 15s infinite;
}

@keyframes float-particle {
    0%, 100% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.3;
    }
    90% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

/* 网格背景 */
.grid-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image: 
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.3;
    pointer-events: none;
}

/* 渐变背景动画 */
.animated-gradient {
    background: linear-gradient(-45deg, #007AFF, #5AC8FA, #5856D6, #AF52DE);
    background-size: 400% 400%;
    animation: gradient-shift 15s ease infinite;
}

@keyframes gradient-shift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* ============================================
   滚动指示器
   ============================================ */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    animation: bounce 2s infinite;
}

.scroll-indicator svg {
    width: 24px;
    height: 24px;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ============================================
   加载骨架屏
   ============================================ */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-tertiary) 25%,
        var(--bg-secondary) 50%,
        var(--bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

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

/* ============================================
   成功/错误状态
   ============================================ */
.success-pulse {
    animation: success-pulse 0.5s ease;
}

@keyframes success-pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
        box-shadow: 0 0 20px rgba(52, 199, 89, 0.5);
    }
    100% {
        transform: scale(1);
    }
}

.error-shake {
    animation: error-shake 0.5s ease;
}

@keyframes error-shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* ============================================
   导航栏滚动效果
   ============================================ */
.nav-blur {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.nav-solid {
    background: var(--bg-secondary);
}

/* ============================================
   模态框动画
   ============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    z-index: 2001;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    max-width: 90vw;
    max-height: 90vh;
    overflow: auto;
}

.modal-overlay.active + .modal-content,
.modal-content.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

/* ============================================
   工具提示
   ============================================ */
.tooltip {
    position: relative;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 100;
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* ============================================
   进度条
   ============================================ */
.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

/* 无限进度条 */
.progress-bar-indeterminate {
    position: relative;
    overflow: hidden;
}

.progress-bar-indeterminate::after {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 50%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    animation: indeterminate 1.5s ease-in-out infinite;
}

@keyframes indeterminate {
    0% {
        left: -50%;
    }
    100% {
        left: 100%;
    }
}

/* ============================================
   开关动画
   ============================================ */
.toggle-switch {
    position: relative;
    width: 52px;
    height: 32px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: background 0.3s ease;
}

.toggle-switch.active {
    background: var(--primary);
}

.toggle-switch::after {
    content: '';
    position: absolute;
    top: 4px;
    left: 4px;
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 50%;
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.toggle-switch.active::after {
    transform: translateX(20px);
}

/* ============================================
   图片懒加载占位
   ============================================ */
.image-placeholder {
    background: linear-gradient(
        110deg,
        var(--bg-tertiary) 8%,
        var(--bg-secondary) 18%,
        var(--bg-tertiary) 33%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s linear infinite;
}

/* ============================================
   响应式动画调整
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 移动端优化 */
@media (max-width: 768px) {
    .particle {
        display: none;
    }
    
    .glow {
        opacity: 0.3;
    }
}