/* 科技探索风格全局样式配置 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@300;400;500;600&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

/* 科技探索风格CSS变量 */
:root {
    --primary: #00D4FF;
    --secondary: #7C3AED;
    --accent: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --dark: #0F0F23;
    --dark-light: #1A1A2E;
    --dark-medium: #16213E;
    --light: #F8FAFC;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* 科技感渐变 */
    --gradient-primary: linear-gradient(135deg, #00D4FF 0%, #7C3AED 100%);
    --gradient-secondary: linear-gradient(135deg, #10B981 0%, #00D4FF 100%);
    --gradient-dark: linear-gradient(135deg, #0F0F23 0%, #1A1A2E 100%);
    
    /* 阴影效果 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-glow-purple: 0 0 20px rgba(124, 58, 237, 0.3);
    
    /* 动画缓动 */
    --transition-fast: 0.15s ease-out;
    --transition-base: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* 科技探索风格基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--dark);
    color: var(--light);
    
    /* 科技感背景 */
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(124, 58, 237, 0.1) 0%, transparent 50%),
        linear-gradient(180deg, var(--dark) 0%, var(--dark-light) 100%);
    
    /* 网格背景 */
    background-size: 50px 50px, 50px 50px, 100% 100%;
    background-attachment: fixed;
}

/* 科技感网格背景 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: -1;
}

/* 科技风格按钮 */
.tech-button-primary {
    position: relative;
    background: var(--gradient-primary);
    color: white;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    border: 1px solid var(--primary);
    transition: all var(--transition-base);
    overflow: hidden;
    box-shadow: var(--shadow-glow);
}

.tech-button-primary::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;
}

.tech-button-primary:hover::before {
    left: 100%;
}

.tech-button-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
}

.tech-button-secondary {
    position: relative;
    background: transparent;
    color: var(--light);
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    border: 1px solid var(--primary);
    transition: all var(--transition-base);
    overflow: hidden;
}

.tech-button-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
    z-index: 0;
}

.tech-button-secondary:hover::before {
    width: 100%;
}

.tech-button-secondary:hover {
    color: white;
    border-color: var(--secondary);
}

/* 科技风格导航链接 */
.nav-link-tech {
    position: relative;
    overflow: hidden;
}

.nav-link-tech::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: left var(--transition-base);
    border-radius: 0.5rem;
    z-index: -1;
}

.nav-link-tech:hover::before {
    left: 0;
}

.nav-link-tech:hover {
    color: white !important;
}

/* 科技风格卡片 */
.tech-card {
    background: var(--dark-light);
    border: 1px solid var(--primary)/20;
    border-radius: 1rem;
    padding: 2rem;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.tech-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.tech-card:hover::before {
    transform: scaleX(1);
}

.tech-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

/* 科技风格步骤卡片 */
.step-card-tech {
    background: var(--dark-light);
    border: 1px solid var(--primary)/20;
    border-radius: 1rem;
    padding: 1.5rem;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.step-card-tech::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, var(--primary)/10, transparent);
    animation: rotate 4s linear infinite;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.step-card-tech:hover::before {
    opacity: 1;
}

.step-card-tech:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

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

/* 手绘风格导航栏 */
#navbar {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

#navbar.scrolled {
    transform: translateY(-2px);
}

.nav-link {
    position: relative;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    transition: all 0.3s var(--transition-bounce);
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: var(--primary);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.3s var(--transition-bounce);
    z-index: -1;
}

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

.nav-link:hover {
    color: white !important;
    transform: translateY(-2px) rotate(-1deg);
}

/* 移动端菜单 */
#mobile-menu.open {
    transform: translateX(0);
}

.mobile-nav-link {
    position: relative;
    padding: 1rem 0;
}

.mobile-nav-link::after {
    content: '';
    position: absolute;
    bottom: 0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s var(--transition-smooth);
}

.mobile-nav-link:hover::after {
    width: 50px;
}

/* 手绘风格按钮 */
.sketch-button {
    position: relative;
    border: 3px solid transparent;
    border-radius: 25px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    background-clip: padding-box;
    overflow: hidden;
}

.sketch-button::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    border-radius: 25px;
    z-index: -1;
    transform: rotate(-2deg);
    transition: transform 0.3s var(--transition-bounce);
}

.sketch-button:hover::before {
    transform: rotate(2deg);
}

.sketch-button::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--warm);
    border-radius: 25px;
    z-index: -2;
    transform: rotate(1deg);
    opacity: 0.3;
}

/* 手绘风格步骤卡片 */
.step-card-sketch {
    transition: all 0.3s var(--transition-bounce);
}

.step-card-sketch:hover {
    transform: translateY(-5px);
}

.step-card-sketch .paper-texture {
    position: relative;
    overflow: hidden;
}

.step-card-sketch .paper-texture::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle, var(--primary) 1px, transparent 1px),
        radial-gradient(circle, var(--secondary) 1px, transparent 1px);
    background-size: 20px 20px, 30px 30px;
    background-position: 0 0, 15px 15px;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.step-card-sketch:hover .paper-texture::after {
    opacity: 0.05;
}

/* 手绘风格价值卡片 */
.value-card {
    transition: all 0.4s var(--transition-bounce);
    position: relative;
}

.value-card::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    border: 2px dashed var(--primary);
    border-radius: 20px;
    opacity: 0;
    transform: rotate(-2deg);
    transition: all 0.3s var(--transition-bounce);
}

.value-card:hover::before {
    opacity: 0.3;
    transform: rotate(2deg);
}

.value-card:hover {
    transform: translateY(-8px) rotate(-1deg);
    box-shadow: var(--shadow-sketch);
}

/* 案例滑动器样式 */
.case-slider {
    position: relative;
}

.case-cards {
    position: relative;
}

.case-card {
    box-shadow: var(--shadow-card);
    transition: all 0.3s var(--transition-smooth);
}

.case-nav-btn {
    cursor: pointer;
    transition: all 0.3s var(--transition-smooth);
}

.case-nav-btn.active {
    background-color: var(--primary);
    transform: scale(1.2);
}

.case-nav-btn:hover {
    background-color: var(--secondary);
}

/* 步骤详情页样式 */
.step-detail {
    min-height: 100vh;
    padding-top: 80px;
}

.mindmap-container {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow-card);
    margin: 2rem 0;
}

.mindmap-node {
    background: var(--light);
    border: 2px solid var(--primary);
    border-radius: 0.5rem;
    padding: 1rem;
    margin: 0.5rem;
    transition: all 0.3s var(--transition-smooth);
}

.mindmap-node:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.05);
}

.action-checklist {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow-card);
}

.action-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid #e5e7eb;
    transition: all 0.3s var(--transition-smooth);
}

.action-item:hover {
    background: var(--light);
    transform: translateX(10px);
}

.action-item input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    margin-right: 1rem;
    accent-color: var(--primary);
}

/* 滚动动画 */
.fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s var(--transition-smooth);
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 移动端导航 */
    #navbar {
        padding: 1rem 0;
    }
    
    /* 英雄区 */
    #home h1 {
        font-size: 2.5rem;
        line-height: 1.2;
    }
    
    #typing-text {
        font-size: 2.5rem;
    }
    
    /* 价值卡片 */
    .value-card {
        margin-bottom: 2rem;
    }
    
    .value-card:hover {
        transform: scale(1.02) rotateY(2deg);
    }
    
    /* 步骤卡片 */
    .step-card {
        margin-bottom: 1.5rem;
    }
    
    .step-card:hover {
        transform: scale(1.02);
    }
    
    /* 案例卡片 */
    .case-card {
        margin: 0 1rem;
    }
}

@media (max-width: 480px) {
    /* 超小屏幕优化 */
    #home h1 {
        font-size: 2rem;
    }
    
    #typing-text {
        font-size: 2rem;
    }
    
    .value-card,
    .step-card,
    .case-card {
        padding: 1.5rem;
    }
    
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* 高分辨率屏幕优化 */
@media (min-width: 1200px) {
    .container {
        max-width: 1200px;
    }
    
    #home h1 {
        font-size: 4rem;
    }
    
    .value-card:hover {
        transform: scale(1.08) rotateY(8deg);
    }
    
    .step-card:hover {
        transform: scale(1.08);
    }
}

/* 打印样式 */
@media print {
    #navbar,
    #mobile-menu,
    footer {
        display: none;
    }
    
    .step-card,
    .value-card,
    .case-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* 无障碍访问优化 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 树形结构样式 */
.tree-root {
    position: relative;
    z-index: 10;
}

.tree-container {
    position: relative;
    min-height: 600px;
}

.tree-lines {
    z-index: 1;
}

.tree-node {
    position: relative;
    z-index: 10;
    min-height: 400px;
}

.tree-subnodes {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s var(--transition-smooth);
}

.tree-node:hover .tree-subnodes {
    max-height: 500px;
}

.subnode {
    transform: translateY(10px);
    opacity: 0;
    transition: all 0.3s var(--transition-smooth);
}

.tree-node:hover .subnode {
    transform: translateY(0);
    opacity: 1;
}

.tree-node:hover .subnode:nth-child(1) {
    transition-delay: 0.1s;
}

.tree-node:hover .subnode:nth-child(2) {
    transition-delay: 0.2s;
}

/* 连接线动画 */
.tree-lines > div {
    opacity: 0;
    animation: lineAppear 1s var(--transition-smooth) forwards;
}

.tree-lines > div:nth-child(1) {
    animation-delay: 0.5s;
}

.tree-lines > div:nth-child(2) {
    animation-delay: 0.7s;
}

.tree-lines > div:nth-child(n+3) {
    animation-delay: 0.9s;
}

@keyframes lineAppear {
    from {
        opacity: 0;
        transform: scaleY(0);
    }
    to {
        opacity: 1;
        transform: scaleY(1);
    }
}

/* 移动端树形结构优化 */
@media (max-width: 768px) {
    .tree-container {
        min-height: auto;
    }
    
    .tree-node {
        min-height: auto;
        margin-bottom: 2rem;
    }
    
    .tree-subnodes {
        max-height: none;
        overflow: visible;
    }
    
    .subnode {
        transform: none;
        opacity: 1;
    }
    
    .tree-lines {
        display: none !important;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --light: #1a1a1a;
        --dark: #ffffff;
    }
    
    body {
        background-color: #1a1a1a;
        color: #ffffff;
    }
    
    .bg-white {
        background-color: #2a2a2a !important;
    }
    
    .bg-light {
        background-color: #1a1a1a !important;
    }
    
    .text-dark {
        color: #ffffff !important;
    }
    
    .text-gray-600 {
        color: #a0a0a0 !important;
    }
}