/* 造物者AI - 单卡片布局设计系统 */

/* CSS变量定义 - 全新设计标记 */
:root {
    /* 品牌色彩系统 */
    --brand-primary: #40C4C0;
    --brand-secondary: #2a8a87;
    --brand-light: #66d4d1;
    --brand-ultra-light: rgba(64, 196, 192, 0.06);
    
    /* 中性色彩 */
    --neutral-900: #1a202c;
    --neutral-800: #2d3748;
    --neutral-700: #4a5568;
    --neutral-600: #718096;
    --neutral-500: #a0aec0;
    --neutral-400: #cbd5e0;
    --neutral-300: #e2e8f0;
    --neutral-200: #edf2f7;
    --neutral-100: #f7fafc;
    --neutral-50: #ffffff;
    
    /* 语义色彩 */
    --surface-primary: #ffffff;
    --surface-secondary: #f8fafa;
    --surface-elevated: #ffffff;
    --text-primary: var(--neutral-900);
    --text-secondary: var(--neutral-700);
    --text-tertiary: var(--neutral-600);
    --text-brand: var(--brand-primary);
    
    /* 字体系统 */
    --font-family-primary: "PingFangSC-Regular", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-family-medium: "PingFangSC-Medium", sans-serif;
    --font-family-semibold: "PingFangSC-Semibold", sans-serif;
    
    /* 字体大小 */
    --text-6xl: 48px;
    --text-5xl: 40px;
    --text-4xl: 32px;
    --text-3xl: 28px;
    --text-2xl: 24px;
    --text-xl: 20px;
    --text-lg: 18px;
    --text-base: 16px;
    --text-sm: 14px;
    --text-xs: 12px;
    
    /* 行高系统 */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* 间距系统 - 8px基础网格 */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;
    
    /* 圆角系统 */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-3xl: 24px;
    
    /* 阴影系统 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
    --shadow-brand: 0 10px 25px rgba(64, 196, 192, 0.15);
    
    /* 过渡动画 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* 导航样式 - 与index.html保持一致 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(64, 196, 192, 0.1);
    padding: 15px 40px;
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(64, 196, 192, 0.1);
}

.logo {
    font-size: 32px;
    color: #40C4C0;
    font-family: var(--font-family-semibold);
    text-decoration: none;
    display: block;
    cursor: default;
}

.logo img {
    height: 60px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    color: #40C4C0;
    text-decoration: none;
    font-family: var(--font-family-medium);
    font-size: 16px;
    transition: all 0.3s ease;
    padding: 8px 16px;
    border-radius: 8px;
}

.nav-link:hover {
    background: rgba(64, 196, 192, 0.1);
    transform: translateY(-2px);
}

.nav-link.active {
    background: rgba(64, 196, 192, 0.2);
    font-family: var(--font-family-semibold);
}

/* 页面容器重置 */
.single-card-container {
    height: 100vh;
    background: url('../images/wave-bg.png') no-repeat center center;
    background-size: cover;
    background-attachment: fixed;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* 主卡片容器 */
.main-card-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--space-6);
    min-height: calc(100vh - 80px); /* 减去导航高度 */
    box-sizing: border-box;
}

.main-card {
    background: var(--surface-elevated);
    border-radius: var(--radius-3xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 1400px;
    max-height: calc(100vh - 120px);
    overflow: hidden;
    position: relative;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    
    /* 初始状态 - 隐藏 */
    opacity: 0;
    transform: translateY(20px);
    
    /* 动画过渡 - 简单淡入效果 */
    animation: cardFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* 卡片头部 */
.card-header {
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    color: var(--surface-primary);
    padding: var(--space-8) var(--space-10);
    text-align: center;
    position: relative;
    overflow: hidden;
    
    /* 头部动画 */
    opacity: 0;
    transform: translateY(20px);
    animation: headerFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.2s forwards;
}

.card-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    animation: shimmer 3s infinite;
}

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

/* 卡片淡入动画 - 与index.html保持一致 */
@keyframes cardFadeIn {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes headerFadeIn {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes contentFadeIn {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes sectionFadeIn {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes featureFadeIn {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.content-section:nth-child(1) { animation-delay: 0.6s; }
.content-section:nth-child(2) { animation-delay: 0.7s; }
.content-section:nth-child(3) { animation-delay: 0.8s; }
.content-section:nth-child(4) { animation-delay: 0.9s; }
.content-section:nth-child(5) { animation-delay: 1.0s; }
.content-section:nth-child(6) { animation-delay: 1.1s; }

@keyframes tagFadeIn {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-item:nth-child(1) { animation-delay: 0.8s; }
.feature-item:nth-child(2) { animation-delay: 0.9s; }
.feature-item:nth-child(3) { animation-delay: 1.0s; }
.feature-item:nth-child(4) { animation-delay: 1.1s; }
.feature-item:nth-child(5) { animation-delay: 1.2s; }
.feature-item:nth-child(6) { animation-delay: 1.3s; }

@keyframes highlightFadeIn {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.tag:nth-child(1) { animation-delay: 1.0s; }
.tag:nth-child(2) { animation-delay: 1.05s; }
.tag:nth-child(3) { animation-delay: 1.1s; }
.tag:nth-child(4) { animation-delay: 1.15s; }
.tag:nth-child(5) { animation-delay: 1.2s; }
.tag:nth-child(6) { animation-delay: 1.25s; }

.card-title {
    font-family: var(--font-family-semibold);
    font-size: var(--text-5xl);
    font-weight: 600;
    margin: 0 0 var(--space-3) 0;
    line-height: var(--leading-tight);
    position: relative;
    z-index: 1;
}

.card-subtitle {
    font-family: var(--font-family-medium);
    font-size: var(--text-xl);
    opacity: 0.9;
    margin: 0;
    line-height: var(--leading-normal);
    position: relative;
    z-index: 1;
}

.card-content {
    padding: var(--space-10);
    height: calc(100vh - 320px);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--brand-primary) var(--neutral-200);
    
    /* 内容动画 */
    opacity: 0;
    transform: translateY(20px);
    animation: contentFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.4s forwards;
}

.card-content::-webkit-scrollbar {
    width: 6px;
}

.card-content::-webkit-scrollbar-track {
    background: var(--neutral-200);
    border-radius: var(--radius-lg);
}

.card-content::-webkit-scrollbar-thumb {
    background: var(--brand-primary);
    border-radius: var(--radius-lg);
}

.card-content::-webkit-scrollbar-thumb:hover {
    background: var(--brand-secondary);
}

.content-grid {
    display: grid;
    gap: var(--space-8);
    min-height: 100%;
}

.content-grid.two-column {
    grid-template-columns: 1fr 1fr;
}

.content-grid.three-column {
    grid-template-columns: 1fr 1fr 1fr;
}

.content-grid.four-column {
    grid-template-columns: repeat(4, 1fr);
}

.content-grid.asymmetric {
    grid-template-columns: 2fr 1fr;
}

.content-section {
    background: var(--surface-secondary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    border: 1px solid var(--neutral-300);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    
    /* 区块动画 */
    opacity: 0;
    transform: translateY(20px);
    animation: sectionFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.content-section:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-brand);
    border-color: var(--brand-primary);
}

.section-title {
    font-family: var(--font-family-semibold);
    font-size: var(--text-2xl);
    color: var(--text-primary);
    margin: 0 0 var(--space-4) 0;
    line-height: var(--leading-tight);
    position: relative;
    padding-left: var(--space-4);
}

.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: var(--brand-primary);
    border-radius: var(--radius-sm);
}

.section-subtitle {
    font-family: var(--font-family-medium);
    font-size: var(--text-lg);
    color: var(--text-brand);
    margin: 0 0 var(--space-3) 0;
    line-height: var(--leading-snug);
}

.section-text {
    font-family: var(--font-family-primary);
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin: 0 0 var(--space-4) 0;
}

.section-text:last-child {
    margin-bottom: 0;
}

.section-text strong {
    color: var(--text-primary);
    font-family: var(--font-family-medium);
}

.highlight-block {
    background: linear-gradient(135deg, var(--brand-ultra-light), rgba(255, 255, 255, 0.8));
    border: 2px solid var(--brand-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin: var(--space-4) 0;
    position: relative;
    overflow: hidden;
    
    opacity: 0;
    transform: translateY(20px);
    animation: highlightFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) 1.0s forwards;
}

.highlight-block::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(64, 196, 192, 0.1) 0%, transparent 70%);
    animation: pulse 4s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.1); }
}

.highlight-text {
    font-family: var(--font-family-medium);
    font-size: var(--text-lg);
    color: var(--text-primary);
    line-height: var(--leading-normal);
    margin: 0;
    position: relative;
    z-index: 1;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: var(--space-3);
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--surface-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--neutral-300);
    transition: all var(--transition-fast);
    
    opacity: 0;
    transform: translateY(20px);
    animation: featureFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.feature-item:hover {
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-sm);
}

.feature-icon {
    width: 8px;
    height: 8px;
    background: var(--brand-primary);
    border-radius: 50%;
    margin-top: var(--space-2);
    flex-shrink: 0;
}

.feature-content {
    flex: 1;
}

.feature-title {
    font-family: var(--font-family-medium);
    font-size: var(--text-base);
    color: var(--text-primary);
    margin: 0 0 var(--space-1) 0;
    line-height: var(--leading-snug);
}

.feature-description {
    font-family: var(--font-family-primary);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: var(--leading-normal);
    margin: 0;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    background: var(--brand-ultra-light);
    color: var(--brand-primary);
    border: 1px solid var(--brand-primary);
    border-radius: var(--radius-lg);
    font-family: var(--font-family-medium);
    font-size: var(--text-sm);
    font-weight: 500;
    margin: var(--space-1);
    transition: all var(--transition-fast);
    
    opacity: 0;
    transform: translateY(20px);
    animation: tagFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.tag:hover {
    background: var(--brand-primary);
    color: var(--surface-primary);
    transform: translateY(-1px);
}

.divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--neutral-300), transparent);
    margin: var(--space-6) 0;
    border: none;
}

.beian {
    position: absolute;
    bottom: 5px;
    width: 100%;
    text-align: center;
    font-family: var(--font-family-medium);
    color: #40C4C0;
    font-size: 10px;
    z-index: 1000;
}

.beian a:link, 
.beian a:visited {
    color: #40C4C0;
    text-decoration: none;
}

.beian a:hover {
    text-decoration: underline;
}

@media (max-width: 1200px) {
    .main-card {
        max-width: 95%;
        margin: 0 var(--space-4);
        max-height: calc(100vh - 100px);
    }
    
    .content-grid.four-column {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .content-grid.three-column {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .main-card-wrapper {
        padding: var(--space-2);
        min-height: calc(100vh - 80px);
    }
    
    .main-card {
        max-height: calc(100vh - 90px);
    }
    
    .card-header {
        padding: var(--space-6);
    }
    
    .card-title {
        font-size: var(--text-4xl);
    }
    
    .card-subtitle {
        font-size: var(--text-lg);
    }
    
    .card-content {
        padding: var(--space-6);
        height: calc(100vh - 250px);
    }
    
    .content-grid.two-column,
    .content-grid.three-column,
    .content-grid.four-column,
    .content-grid.asymmetric {
        grid-template-columns: 1fr;
    }
    
    .content-section {
        padding: var(--space-4);
    }
    
    .section-title {
        font-size: var(--text-xl);
    }
}

@media (max-width: 480px) {
    .main-card-wrapper {
        padding: var(--space-1);
    }
    
    .card-header {
        padding: var(--space-4);
    }
    
    .card-title {
        font-size: var(--text-3xl);
    }
    
    .card-content {
        padding: var(--space-4);
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
    
    .main-card,
    .card-header,
    .card-content,
    .content-section,
    .feature-item,
    .tag,
    .highlight-block {
        opacity: 1 !important;
        transform: none !important;
    }
}

@media print {
    .main-card {
        box-shadow: none;
        border: 1px solid var(--neutral-400);
        max-height: none;
    }
    
    .card-content {
        height: auto;
        overflow: visible;
    }
    
    .content-section:hover {
        transform: none;
        box-shadow: none;
    }
}