/* 现代化设计系统 - 暖色主题 */
:root {
    --primary-color: #ff6b6b;
    --secondary-color: #ffa726;
    --accent-color: #ffb74d;
    --success-color: #66bb6a;
    --warning-color: #ffca28;
    --error-color: #ef5350;
    
    --bg-primary: #ffffff;
    --bg-secondary: #fff8f5;
    --bg-tertiary: #ffeaa7;
    --bg-glass: rgba(255, 255, 255, 0.25);
    
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --text-tertiary: #a0a0a0;
    --text-light: #ffffff;
    
    --border-color: #ffeaa7;
    --border-light: #fff8f5;
    
    --shadow-sm: 0 1px 3px rgba(255, 107, 107, 0.1);
    --shadow-md: 0 4px 6px rgba(255, 107, 107, 0.1);
    --shadow-lg: 0 10px 15px rgba(255, 107, 107, 0.1);
    --shadow-xl: 0 20px 25px rgba(255, 107, 107, 0.1);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* 全局重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, #ff6b6b 0%, #ffa726 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 背景装饰 */
.bg-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.bg-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
}

.bg-circle-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: -5%;
    animation-delay: 0s;
}

.bg-circle-2 {
    width: 200px;
    height: 200px;
    top: 60%;
    right: -5%;
    animation-delay: 2s;
}

.bg-circle-3 {
    width: 150px;
    height: 150px;
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

.bg-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, 
        rgba(255, 107, 107, 0.1) 0%, 
        rgba(255, 167, 38, 0.1) 50%, 
        rgba(255, 183, 77, 0.1) 100%);
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

/* 现代化导航栏 */
.modern-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.nav-logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    font-size: 1.8rem;
    animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.1) rotate(180deg); }
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.5s ease;
}

.nav-link:hover::before {
    left: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(255, 107, 107, 0.1);
    transform: translateY(-2px);
}

.link-icon {
    font-size: 1.2rem;
}

/* 主内容区域 */
.main-content {
    padding-top: 100px;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
}

/* 欢迎区域 */
.welcome-section {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    margin-bottom: var(--spacing-xl);
}

.welcome-content {
    max-width: 600px;
    margin: 0 auto;
}

.welcome-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    animation: fadeInUp 1s ease-out;
}

.welcome-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
    animation: fadeInUp 1s ease-out 0.2s both;
}

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

/* 功能卡片网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.feature-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 183, 77, 0.2);
    transition: all 0.3s ease;
    animation: fadeInUp 0.8s ease-out;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px rgba(255, 107, 107, 0.15);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

.card-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-md);
    color: white;
    box-shadow: var(--shadow-md);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* 生日倒计时样式 */
.birthday-widget {
    text-align: center;
}

.birthday-widget .cake {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--spacing-md);
    animation: bounce 2s ease-in-out infinite;
}

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

.birthday-widget .countdown-time {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
}

.birthday-widget .time-unit {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    font-weight: 600;
    min-width: 60px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.birthday-widget .time-unit:hover {
    transform: scale(1.05);
}

/* 生日日期文本 */
.birthday-date {
    font-size: 1rem;
    color: var(--text-tertiary);
    margin-top: var(--spacing-sm);
}

.birthday-widget .unit-label {
    margin: 0 var(--spacing-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

/* 轮播文字描述区域 */
.carousel-caption {
    text-align: center;
    max-width: 100%;
}

.carousel-caption .carousel-title {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.carousel-caption .carousel-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.carousel-caption .carousel-time {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* 空调卡片样式 */
.portable-ac {
    display: flex;
    justify-content: center;
    padding: 0;
    background: none;
    min-height: auto;
    align-items: stretch;
}

.ac-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    max-width: 100%;
    width: 100%;
    transition: all 0.3s ease;
}

.ac-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.ac-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.brand-icon {
    font-size: 1.5rem;
}

.brand-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.ac-power-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.power-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--error-color);
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(255, 107, 107, 0.5);
}

.power-dot.active {
    background: var(--success-color);
    box-shadow: 0 0 10px rgba(102, 187, 106, 0.5);
}

.ac-display-panel {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.temperature-display {
    display: flex;
    justify-content: center;
    align-items: baseline;
    margin-bottom: var(--spacing-md);
}

.temp-value {
    font-size: 4rem;
    font-weight: 300;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.temp-unit {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-left: var(--spacing-sm);
}

.ac-status-info {
    display: flex;
    justify-content: space-around;
    gap: var(--spacing-md);
}

.status-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.status-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.status-value {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.ac-controls-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.control-row {
    display: flex;
    gap: var(--spacing-md);
}

.control-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #f0f0f0, #e6e6e6);
    box-shadow: 5px 5px 10px #d1d1d1, -5px -5px 10px #ffffff;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    color: var(--text-primary);
    font-family: var(--font-family);
}

.control-btn:hover {
    transform: translateY(-2px);
    box-shadow: 7px 7px 15px #d1d1d1, -7px -7px 15px #ffffff;
}

.control-btn:active {
    transform: translateY(0);
    box-shadow: inset 3px 3px 6px #d1d1d1, inset -3px -3px 6px #ffffff;
}

.control-btn.active {
    background: linear-gradient(145deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: inset 3px 3px 6px rgba(0,0,0,0.2), inset -3px -3px 6px rgba(255,255,255,0.1);
}

.power-btn.active {
    background: linear-gradient(145deg, var(--success-color), #26d0ce);
}

.control-btn i {
    font-size: 1.5rem;
}

.ac-preset-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.preset-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.preset-select {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: white;
    font-size: 1rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-family);
}

.preset-select:hover {
    border-color: var(--primary-color);
}

.preset-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

/* 关机状态样式 */
.ac-card.power-off {
    opacity: 0.7;
}

.ac-card.power-off .temp-value {
    color: var(--text-tertiary);
}

.ac-card.power-off .status-value {
    color: var(--text-tertiary);
}

.ac-card.power-off .control-btn:not(.power-btn) {
    opacity: 0.5;
    pointer-events: none;
}

/* 轮播样式 */
.modern-carousel {
    width: 100%;
}

.carousel-container {
    position: relative;
}

.carousel-slide {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.carousel-img-box {
    width: 100%;
    max-width: 100%;
    aspect-ratio: 16/9;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.carousel-img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.3s ease;
}

.carousel-img-box:hover img {
    transform: scale(1.05);
}

.carousel-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    transform: translateY(-50%);
}

.carousel-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.carousel-btn:hover {
    background: white;
    transform: scale(1.1);
}

.carousel-title {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.carousel-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.carousel-time {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    text-align: center;
}

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-dot.active {
    background: var(--primary-color);
    transform: scale(1.2);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.9rem;
    }
    
    .link-text {
        display: none;
    }
    
    .main-content {
        padding-top: 80px;
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
    
    .welcome-title {
        font-size: 2rem;
    }
    
    .welcome-subtitle {
        font-size: 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .feature-card {
        padding: var(--spacing-lg);
    }
    
    .birthday-widget .countdown-time {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .birthday-widget .time-unit {
        font-size: 1.2rem;
        padding: var(--spacing-sm) var(--spacing-md);
        min-width: 50px;
    }
    
    .temp-value {
        font-size: 3rem;
    }
    
    .control-btn {
        padding: var(--spacing-sm);
        font-size: 0.8rem;
    }
    
    /* 移动端图片优化 */
    .carousel-img-box {
        aspect-ratio: 4/3;
        margin-bottom: var(--spacing-md);
    }
    
    .carousel-controls {
        padding: 0 var(--spacing-sm);
    }
    
    .carousel-btn {
        width: 35px;
        height: 35px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .welcome-title {
        font-size: 1.8rem;
    }
    
    .card-header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .card-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .card-title {
        font-size: 1.3rem;
    }
    
    /* 小屏幕图片进一步优化 */
    .carousel-img-box {
        aspect-ratio: 1/1;
        border-radius: var(--radius-md);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .feature-card {
        padding: var(--spacing-md);
        border-radius: var(--radius-lg);
    }
}

/* 倒计时卡片美化 */
.countdown-time {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0 var(--spacing-md) 0;
}
.countdown-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    min-width: 70px;
    min-height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 24px rgba(255,107,107,0.13);
    padding: var(--spacing-md) var(--spacing-lg);
    transition: box-shadow 0.3s, transform 0.2s;
    position: relative;
}
.countdown-card:hover {
    box-shadow: 0 16px 32px rgba(255,107,107,0.18);
    transform: translateY(-4px) scale(1.04);
}
.time-num {
    font-size: 2.3rem;
    font-weight: 700;
    color: #fff;
    line-height: 1.1;
    margin-bottom: 0.2em;
    transition: transform 0.2s;
}
.time-label {
    font-size: 1rem;
    color: rgba(255,255,255,0.85);
    font-weight: 500;
    letter-spacing: 0.1em;
    line-height: 1;
}
/* 数字变化动画 */
.num-animate {
    animation: num-bounce 0.4s cubic-bezier(.5,1.8,.5,1) 1;
}
@keyframes num-bounce {
    0% { transform: scale(1); }
    30% { transform: scale(1.25); }
    60% { transform: scale(0.92); }
    100% { transform: scale(1); }
}
/* 标题与日期分割线 */
.countdown-title {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 500;
}
.birthday-divider {
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
    margin: var(--spacing-md) auto;
    border-radius: 1px;
}
.birthday-date {
    font-size: 1rem;
    color: var(--text-tertiary);
    margin-top: var(--spacing-xs);
    text-align: center;
}
@media (max-width: 600px) {
    .countdown-time {
        gap: var(--spacing-sm);
    }
    .countdown-card {
        min-width: 48px;
        min-height: 56px;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    .time-num {
        font-size: 1.3rem;
    }
    .time-label {
        font-size: 0.8rem;
    }
}