/* ========== 通用样式 ========== */
.no-results {
    text-align: center;
    color: var(--text-secondary);
    padding: var(--spacing-lg);
    font-style: italic;
}

/* ========== 代码复制按钮样式 ========== */
.copy-button {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs);
    color: var(--primary-color);
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(-5px);
}

.code-block:hover .copy-button {
    opacity: 1;
    transform: translateY(0);
}

.copy-button:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--primary-color);
}



/* ========== 悬浮按钮增强样式 ========== */
.floating-action {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.8);
}

.floating-action.visible {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

.floating-action:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: var(--shadow-glow);
}

.floating-action::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0;
    transform: scale(0);
    animation: ripple 1.5s infinite;
}

@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(2);
        opacity: 0;
    }
}

/* ========== 打字效果样式 ========== */
.typewriter {
    border-right: 2px solid var(--primary-color);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { border-color: transparent; }
    51%, 100% { border-color: var(--primary-color); }
}

/* ========== 卡片3D效果增强 ========== */
.feature-card,
.provider-card,
.example-card {
    transform-style: preserve-3d;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::after,
.provider-card::after,
.example-card::after {
    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 0.5s ease;
}

.feature-card:hover::after,
.provider-card:hover::after,
.example-card:hover::after {
    left: 100%;
}

/* ========== 加载动画增强 ========== */
.loading-enhanced {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--dark-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-enhanced.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
}

.loading-logo {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    animation: pulse 2s infinite;
}

.loading-text {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
}

.loading-progress {
    width: 200px;
    height: 4px;
    background: rgba(0, 212, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
    margin: 0 auto;
}

.loading-progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    width: 0%;
    animation: progress 3s ease-in-out infinite;
}

@keyframes progress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

/* ========== 通知系统 ========== */
.notification {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--card-bg);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    color: var(--text-primary);
    box-shadow: var(--shadow-lg);
    z-index: 10000;
    transform: translateX(100%);
    opacity: 0;
    transition: all 0.3s ease;
    max-width: 300px;
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
}

.notification.success {
    border-color: #4caf50;
}

.notification.error {
    border-color: #f44336;
}

.notification.warning {
    border-color: #ff9800;
}

.notification-close {
    position: absolute;
    top: var(--spacing-xs);
    right: var(--spacing-xs);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.notification-close:hover {
    color: var(--text-primary);
}

/* ========== 工具提示 ========== */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip-text {
    visibility: hidden;
    width: 200px;
    background: var(--card-bg);
    color: var(--text-primary);
    text-align: center;
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    position: absolute;
    z-index: 1000;
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    border: 1px solid rgba(0, 212, 255, 0.2);
    box-shadow: var(--shadow-md);
}

.tooltip-text::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--card-bg) transparent transparent transparent;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* ========== 进度条 ========== */
.progress-bar {
    width: 100%;
    height: 4px;
    background: rgba(0, 212, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
    margin: var(--spacing-md) 0;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    width: 0%;
    transition: width 0.3s ease;
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
    .floating-action {
        width: 50px;
        height: 50px;
        bottom: var(--spacing-md);
        right: var(--spacing-md);
    }
    
    .notification {
        top: var(--spacing-md);
        right: var(--spacing-md);
        left: var(--spacing-md);
        max-width: none;
    }
}

/* ========== 性能优化 ========== */
.will-change {
    will-change: transform, opacity;
}

.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* ========== 可访问性 ========== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 焦点样式 */
.focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 减少动画 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========== 暗色模式适配 ========== */
@media (prefers-color-scheme: dark) {
    :root {
        --dark-bg: #0a0a0a;
        --card-bg: #1a1a1a;
        --text-primary: #ffffff;
        --text-secondary: #b0b0b0;
    }
}

/* ========== 高对比度模式 ========== */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #00e5ff;
        --secondary-color: #0088cc;
        --text-primary: #ffffff;
        --text-secondary: #cccccc;
    }
}