/* 渊远科技网站 - 动画效果 */
/* 关键帧动画和动画工具类 */

/* ===== 关键帧动画 ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes slideInDown {
    from {
        transform: translateY(-100%);
    }
    to {
        transform: translateY(0);
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

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

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(10, 140, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 30px rgba(10, 140, 255, 0.6);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

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

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

@keyframes typewriter {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

@keyframes blink {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
}

/* ===== 滚动触发动画 ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

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

/* ===== 动画类 ===== */
.animate-fade-in {
    animation: fadeIn 0.6s ease forwards;
}

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

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

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

.animate-scale-in {
    animation: scaleIn 0.6s ease forwards;
}

.animate-slide-in-down {
    animation: slideInDown 0.3s ease forwards;
}

.animate-slide-in-up {
    animation: slideInUp 0.3s ease forwards;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.animate-glow {
    animation: glow 2s ease-in-out infinite;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-gradient-shift {
    background: linear-gradient(135deg,
        var(--primary-color),
        var(--secondary-color),
        var(--accent-cyan));
    background-size: 200% 200%;
    animation: gradientShift 3s ease infinite;
}

.animate-spin {
    animation: spin 1s linear infinite;
}

.animate-bounce {
    animation: bounce 1s ease infinite;
}

.animate-shimmer {
    background: linear-gradient(90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* ===== 组件特定动画 ===== */
/* 导航栏动画 */
.navbar {
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: var(--bg-glass);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    box-shadow: var(--shadow-md);
}

.nav-link {
    position: relative;
    padding: var(--space-sm) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--bg-gradient-primary);
    transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* 菜单切换动画 */
.menu-toggle {
    width: 30px;
    height: 30px;
    position: relative;
    z-index: 1000;
}

.menu-icon,
.menu-icon::before,
.menu-icon::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.menu-icon {
    top: 50%;
    transform: translateY(-50%);
}

.menu-icon::before {
    top: -8px;
}

.menu-icon::after {
    bottom: -8px;
}

.menu-toggle.active .menu-icon {
    background: transparent;
}

.menu-toggle.active .menu-icon::before {
    top: 0;
    transform: rotate(45deg);
}

.menu-toggle.active .menu-icon::after {
    bottom: 0;
    transform: rotate(-45deg);
}

/* Hero部分动画 */
.hero-title .title-line {
    display: block;
    overflow: hidden;
}

.hero-title .title-line:nth-child(1) {
    animation: typewriter 1.5s steps(20) forwards;
}

.hero-title .title-line:nth-child(2) {
    animation: typewriter 1.5s steps(20) 1.5s forwards;
    opacity: 0;
    animation-fill-mode: forwards;
}

.hero-subtitle {
    opacity: 0;
    animation: fadeIn 1s ease 2s forwards;
}

.hero-buttons {
    opacity: 0;
    animation: fadeInUp 1s ease 2.5s forwards;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--text-primary);
    border-bottom: 2px solid var(--text-primary);
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

/* 卡片悬停动画 */
.service-card {
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent);
    transition: left var(--transition-slow);
}

.service-card:hover::before {
    left: 100%;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.service-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-gradient-primary);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-lg);
    transition: all var(--transition-base);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

/* 案例卡片动画 */
.case-card {
    transition: all var(--transition-base);
    overflow: hidden;
}

.case-image {
    position: relative;
    overflow: hidden;
    background: var(--bg-gradient);
}

.case-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.case-card:hover .case-image::after {
    opacity: 0.3;
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* 表单动画 */
.form-group input,
.form-group textarea {
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.05);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(10, 140, 255, 0.1);
    outline: none;
}

.form-group input:invalid:not(:focus):not(:placeholder-shown),
.form-group textarea:invalid:not(:focus):not(:placeholder-shown) {
    border-color: var(--accent-red);
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* 加载动画 */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* 进度条动画 */
.progress-bar {
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--bg-gradient-primary);
    animation: loading 2s ease-in-out infinite;
}

@keyframes loading {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* 粒子动画 */
.particle {
    position: absolute;
    border-radius: 50%;
    background: var(--primary-color);
    pointer-events: none;
    opacity: 0.6;
}

/* ===== 页面过渡动画 ===== */
.page-transition-enter {
    opacity: 0;
    transform: translateY(20px);
}

.page-transition-enter-active {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.5s, transform 0.5s;
}

.page-transition-exit {
    opacity: 1;
    transform: translateY(0);
}

.page-transition-exit-active {
    opacity: 0;
    transform: translateY(-20px);
    transition: opacity 0.5s, transform 0.5s;
}

/* ===== 滚动进度指示器 ===== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--bg-gradient-primary);
    z-index: 1001;
    transition: width 0.1s;
}

/* ===== 减少动画偏好支持 ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .animate-on-scroll {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .nav-link::after,
    .service-card::before,
    .case-image::after {
        transition: none;
    }
}

/* ===== 工具类 ===== */
.animation-paused {
    animation-play-state: paused;
}

.animation-running {
    animation-play-state: running;
}

.animation-delay-none {
    animation-delay: 0s !important;
}

.animation-fill-both {
    animation-fill-mode: both;
}

.animation-fill-forwards {
    animation-fill-mode: forwards;
}

.animation-fill-backwards {
    animation-fill-mode: backwards;
}

.animation-iteration-infinite {
    animation-iteration-count: infinite;
}

.animation-iteration-once {
    animation-iteration-count: 1;
}

/* ===== 性能优化 ===== */
/* 确保动画使用transform和opacity以提高性能 */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

.will-change-transform-opacity {
    will-change: transform, opacity;
}

/* 硬件加速 */
.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}