/* 现代化深色主题样式 */
:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-card: #1e1e1e;
    --bg-card-hover: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --accent-purple: #8b5cf6;
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --accent-pink: #ec4899;
    --accent-orange: #f59e0b;
    --border-color: #2a2a2a;
    --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    --gradient-secondary: linear-gradient(135deg, #ec4899 0%, #8b5cf6 100%);
    --gradient-tertiary: linear-gradient(135deg, #10b981 0%, #3b82f6 100%);
}

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
}

/* iPhone 15 外观样式 */
.phone-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}

.phone-frame {
    width: 320px;
    height: 640px;
    background: linear-gradient(145deg, #1a1a1a, #2d2d2d);
    border-radius: 40px;
    padding: 8px;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.5),
        inset 0 2px 4px rgba(255, 255, 255, 0.1);
    position: relative;
}

.phone-frame::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 25px;
    background: #000;
    border-radius: 15px;
    z-index: 10;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    border-radius: 32px;
    overflow: hidden;
    position: relative;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 4px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-purple);
    border-radius: 2px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a855f7;
}

/* 隐藏横向滚动条 */
::-webkit-scrollbar:horizontal {
    display: none;
}

.no-scrollbar {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.no-scrollbar::-webkit-scrollbar {
    display: none;
}

/* 现代化渐变背景 */
.gradient-bg {
    background: var(--gradient-primary);
}

.magic-gradient {
    background: var(--gradient-secondary);
}

.learn-gradient {
    background: var(--gradient-tertiary);
}

.news-gradient {
    background: linear-gradient(135deg, #f59e0b 0%, #ec4899 100%);
}

/* 现代化卡片样式 */
.modern-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.modern-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-purple);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.1);
}

.glass-card {
    background: rgba(30, 30, 30, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
}

/* 功能卡片样式 */
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-purple);
    box-shadow: 0 25px 50px rgba(139, 92, 246, 0.15);
}

/* 图片遮罩优化 */
.image-overlay {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.3) 0%, rgba(0, 0, 0, 0.6) 100%);
}

.text-overlay {
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.4) 50%, transparent 100%);
}

/* 精致化样式 */
.refined-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.refined-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border-color: var(--accent-purple);
}

/* 按钮样式 */
.modern-btn {
    background: var(--gradient-primary);
    border: none;
    border-radius: 12px;
    color: white;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.modern-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.modern-btn:hover::before {
    left: 100%;
}

.modern-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(139, 92, 246, 0.3);
}

/* 状态栏样式 */
.status-bar {
    background: var(--bg-primary);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

/* 导航栏样式 */
.bottom-nav {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
}

.nav-item {
    transition: all 0.3s ease;
}

.nav-item.active {
    color: var(--accent-purple);
}

.nav-item:hover {
    transform: translateY(-2px);
}

/* 输入框样式 */
.modern-input {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.modern-input:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
    outline: none;
}

.modern-input::placeholder {
    color: var(--text-muted);
}

/* 标签样式 */
.modern-tag {
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-purple);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    padding: 4px 12px;
}

/* 进度条样式 */
.modern-progress {
    background: var(--bg-secondary);
    border-radius: 10px;
    overflow: hidden;
}

.modern-progress-bar {
    background: var(--gradient-primary);
    height: 100%;
    border-radius: 10px;
    transition: width 0.3s ease;
}

/* 头像样式 */
.modern-avatar {
    border: 2px solid var(--accent-purple);
    border-radius: 50%;
    background: var(--gradient-primary);
}

/* 魔法效果 */
.magic-sparkle {
    position: relative;
    overflow: hidden;
}

.magic-sparkle::after {
    content: '✨';
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 16px;
    animation: sparkle 2s infinite;
}

@keyframes sparkle {
    0%, 100% { 
        opacity: 0.6; 
        transform: scale(1) rotate(0deg); 
    }
    50% { 
        opacity: 1; 
        transform: scale(1.2) rotate(180deg); 
    }
}

/* 浮动动画 */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

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

/* 脉冲动画 */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

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

/* 精致化细节 */
.drop-shadow-lg {
    filter: drop-shadow(0 10px 8px rgb(0 0 0 / 0.04)) drop-shadow(0 4px 3px rgb(0 0 0 / 0.1));
}

.drop-shadow-md {
    filter: drop-shadow(0 4px 3px rgb(0 0 0 / 0.07)) drop-shadow(0 2px 2px rgb(0 0 0 / 0.06));
}

/* 平滑过渡 */
.smooth-transition {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 微妙的边框光晕 */
.border-glow {
    box-shadow: 0 0 0 1px rgba(139, 92, 246, 0.1), 0 0 20px rgba(139, 92, 246, 0.05);
}

/* 文字渐变增强 */
.text-gradient-enhanced {
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 50%, #10b981 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradient-shift 3s ease infinite;
}

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

/* 响应式调整 */
@media (max-width: 768px) {
    .phone-frame {
        width: 280px;
        height: 560px;
    }
    
    .phone-container {
        padding: 10px;
    }
}

/* 文本样式 */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 特殊效果 */
.glow-effect {
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
}

.border-gradient {
    border: 1px solid;
    border-image: var(--gradient-primary) 1;
    border-radius: 16px;
}