/**
 * 未来主义建筑美学主题
 * Futuristic Architecture Aesthetic Theme
 */

/* ==================== 色彩系统 ==================== */
:root {
    /* 主色调 */
    --deep-space-gray: #0A1014;
    --liquid-metal-blue: #00D4FF;
    
    /* 辅助色 */
    --titanium-gray: #C5CDD4;
    --matte-white: #FFFFFF;
    
    /* 渐变色 */
    --gradient-blue: linear-gradient(135deg, #00D4FF 0%, #0099CC 100%);
    --gradient-dark: linear-gradient(135deg, #0A1014 0%, #1A2028 100%);
    
    /* 透明度变体 */
    --blue-10: rgba(0, 212, 255, 0.1);
    --blue-20: rgba(0, 212, 255, 0.2);
    --blue-30: rgba(0, 212, 255, 0.3);
    --blue-50: rgba(0, 212, 255, 0.5);
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 212, 255, 0.1);
    --shadow-md: 0 8px 24px rgba(0, 212, 255, 0.15);
    --shadow-lg: 0 20px 40px rgba(0, 212, 255, 0.2);
    --shadow-xl: 0 30px 60px rgba(0, 212, 255, 0.25);
    
    /* 动画时长 */
    --transition-fast: 0.2s;
    --transition-normal: 0.3s;
    --transition-slow: 0.5s;
}

/* ==================== 全局样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--deep-space-gray);
    color: var(--matte-white);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* ==================== 动态背景 ==================== */
.animated-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.animated-background canvas {
    width: 100%;
    height: 100%;
}

/* 几何线条动画 */
.geometric-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0.1;
}

.geometric-line {
    position: absolute;
    background: var(--liquid-metal-blue);
    animation: lineFlow 20s linear infinite;
}

@keyframes lineFlow {
    0% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    50% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(-100vh) translateX(50px);
        opacity: 0;
    }
}

/* ==================== 容器布局 ==================== */
.container {
    position: relative;
    z-index: 1;
    max-width: 1600px;
    margin: 0 auto;
    padding: 40px;
}

/* ==================== 主卡片 - 磨砂玻璃效果 ==================== */
.main-card {
    background: rgba(26, 32, 40, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 24px;
    padding: 60px;
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.main-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, transparent 100%);
    pointer-events: none;
}

.main-card::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--gradient-blue);
    border-radius: 24px;
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.main-card:hover::after {
    opacity: 0.1;
}

/* ==================== Logo 和标题区域 ==================== */
.header-section {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 50px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(0, 212, 255, 0.2);
}

.logo-container {
    position: relative;
    width: 180px;
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-container::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--gradient-blue);
    border-radius: 50%;
    opacity: 0.1;
    animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.2;
    }
}

.logo-container img {
    width: 160px;
    height: 160px;
    object-fit: contain;
    filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.5));
    animation: logoFloat 4s ease-in-out infinite;
}

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

.title-section {
    flex: 1;
}

.main-title {
    font-size: 42px;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
    line-height: 1.2;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-feature-settings: 'kern' 1;
    text-shadow: 0 2px 8px rgba(0, 212, 255, 0.3);
}

.subtitle {
    font-size: 13px;
    color: #33E0FF;
    margin-bottom: 10px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-shadow: 0 1px 4px rgba(0, 212, 255, 0.4);
}

.description {
    font-size: 15px;
    color: #E8EEF2;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* ==================== 搜索区域 ==================== */
.search-container {
    max-width: 900px;
    margin: 0 auto 40px;
}

.search-box {
    position: relative;
}

.search-input {
    width: 100%;
    padding: 20px 120px 20px 24px;
    font-size: 16px;
    background: rgba(26, 32, 40, 0.8);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(0, 212, 255, 0.2);
    border-radius: 50px;
    color: var(--matte-white);
    transition: all var(--transition-normal);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.search-input::placeholder {
    color: var(--titanium-gray);
}

.search-input:focus {
    outline: none;
    border-color: var(--liquid-metal-blue);
    box-shadow: 0 0 0 4px var(--blue-10), 0 8px 24px var(--blue-20);
    transform: translateY(-2px);
}

.search-btn {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--gradient-blue);
    color: white;
    border: none;
    padding: 12px 32px;
    border-radius: 50px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px var(--blue-30);
}

.search-btn:hover {
    transform: translateY(-50%) scale(1.05);
    box-shadow: 0 6px 20px var(--blue-50);
}

.search-btn:active {
    transform: translateY(-50%) scale(0.98);
}

/* ==================== 分类导航 ==================== */
.category-nav {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    justify-content: center;
    padding: 8px;
    background: rgba(26, 32, 40, 0.4);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

.category-btn {
    padding: 10px 24px;
    background: rgba(26, 32, 40, 0.6);
    color: var(--titanium-gray);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 16px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.category-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-blue);
    transition: left var(--transition-normal);
    z-index: -1;
}

.category-btn:hover {
    color: white;
    border-color: var(--liquid-metal-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--blue-20);
}

.category-btn:hover::before {
    left: 0;
}

.category-btn.active {
    background: var(--gradient-blue);
    color: white;
    border-color: var(--liquid-metal-blue);
    box-shadow: 0 4px 16px var(--blue-30);
}

/* ==================== 功能卡片网格 - 3D 视差效果 ==================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
    margin-top: 40px;
    perspective: 1000px;
}

/* ==================== 功能卡片 - 悬浮效果 ==================== */
.feature-card {
    background: rgba(26, 32, 40, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 16px;
    padding: 0;
    text-align: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal) cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    min-height: 260px;
    display: flex;
    flex-direction: column;
}

/* 内发光效果 */
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 16px;
    padding: 1px;
    background: linear-gradient(135deg, var(--liquid-metal-blue), transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

/* 悬停效果 */
.feature-card:hover {
    transform: translateY(-8px) translateZ(20px);
    box-shadow: var(--shadow-lg);
    border-color: var(--liquid-metal-blue);
}

/* 卡片上半部分 - 固定高度 */
.feature-card-top {
    flex: 0 0 180px;
    height: 180px;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 0 !important;
    position: relative;
    min-height: 180px;
}

/* 图标容器 - 绝对居中 */
.feature-icon {
    width: 80px !important;
    height: 80px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    margin: 0 !important;
    padding: 0 !important;
    background: rgba(255, 255, 255, 0.95) !important;
    border: none !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15) !important;
    border-radius: 50% !important;
    transition: all 0.3s ease !important;
    position: absolute !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%) !important;
}

.feature-icon::after {
    display: none !important;
}

.feature-card:hover .feature-icon {
    transform: translate(-50%, -50%) translateY(-4px) scale(1.05) !important;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2) !important;
}

.feature-card:hover .feature-icon::after {
    display: none !important;
}

/* 线性图标样式 */
.feature-icon-img {
    width: 48px !important;
    height: 48px !important;
    object-fit: contain !important;
    display: block !important;
    margin: 0 !important;
    filter: none !important;
    transition: all 0.3s ease !important;
}

.feature-card:hover .feature-icon-img {
    filter: brightness(1.1) !important;
}

/* 卡片下半部分 */
.feature-card-bottom {
    background: rgba(10, 16, 20, 0.8);
    backdrop-filter: blur(10px);
    padding: 20px;
    border-top: 1px solid rgba(0, 212, 255, 0.1);
}

.feature-card:hover .feature-card-bottom {
    background: rgba(10, 16, 20, 0.95);
    border-top-color: var(--liquid-metal-blue);
}

/* 标题 */
.feature-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--matte-white);
    margin: 0 0 8px 0;
    text-align: left;
    letter-spacing: -0.3px;
    transition: all var(--transition-normal);
}

.feature-card:hover .feature-title {
    color: var(--liquid-metal-blue);
    text-shadow: 0 0 10px var(--blue-30);
}

/* 描述 */
.feature-desc {
    font-size: 13px;
    color: var(--titanium-gray);
    line-height: 1.6;
    text-align: left;
    margin: 0;
}

/* 徽章 */
.feature-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 10px;
    background: var(--gradient-blue);
    color: white;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    z-index: 10;
    box-shadow: 0 2px 8px var(--blue-30);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* ==================== 波纹效果 ==================== */
.ripple {
    position: absolute;
    border-radius: 50%;
    background: var(--liquid-metal-blue);
    transform: scale(0);
    animation: rippleEffect 0.6s ease-out;
    pointer-events: none;
}

@keyframes rippleEffect {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* ==================== 加载动画 ==================== */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    gap: 20px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(0, 212, 255, 0.1);
    border-top: 3px solid var(--liquid-metal-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    box-shadow: 0 0 20px var(--blue-20);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    color: var(--titanium-gray);
    font-size: 14px;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1400px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    
    .main-card {
        padding: 40px 30px;
    }
    
    .header-section {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 20px;
    }
}