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

:root {
    /* 主色调 - 深蓝科技感 */
    --primary-color: #1e40af;
    --primary-light: #3b82f6;
    --primary-dark: #1e3a8a;
    --primary-gradient: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    
    /* 辅助色彩 */
    --secondary-color: #475569;
    --accent-color: #0ea5e9;
    --accent-orange: #f97316;
    --accent-green: #059669;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #dc2626;
    
    /* 背景色彩 */
    --bg-color: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-dark: #0f172a;
    --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    --bg-hero: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    
    /* 文本色彩 */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    
    /* 边框和分割线 */
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --border-dark: #cbd5e1;
    
    /* 阴影效果 */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-colored: 0 20px 25px -5px rgb(30 64 175 / 0.1), 0 8px 10px -6px rgb(30 64 175 / 0.1);
    
    /* 圆角 */
    --radius-xs: 0.25rem;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 动画和过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-color);
    font-size: 16px;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
}

/* 改进字体层次 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-sm) 0;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
}

h2 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h3 {
    font-size: 1.875rem;
    font-weight: 600;
}

h4 {
    font-size: 1.5rem;
    font-weight: 600;
}

h5 {
    font-size: 1.25rem;
    font-weight: 600;
}

h6 {
    font-size: 1.125rem;
    font-weight: 600;
}

p {
    margin: 0 0 var(--spacing-md) 0;
    line-height: 1.7;
    color: var(--text-secondary);
}

/* 链接样式 */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-normal);
}

a:hover {
    color: var(--primary-light);
}

/* 强调文本 */
strong, b {
    font-weight: 700;
    color: var(--text-primary);
}

em, i {
    font-style: italic;
}

/* 代码样式 */
code {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    background: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.875em;
    color: var(--primary-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* 滚动进度指示器 */
.scroll-progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: rgba(0, 0, 0, 0.1);
    z-index: 1001;
}

.scroll-progress {
    height: 100%;
    background: var(--primary-gradient);
    width: 0%;
    transition: width 0.1s ease;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1rem 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-lg);
    padding: 0.75rem 0;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.nav-brand:hover {
    color: var(--primary-light);
    transform: translateY(-2px);
}

.nav-brand i {
    margin-right: 0.5rem;
    font-size: 1.75rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    margin: 0;
}

.nav-menu li {
    position: relative;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: width var(--transition-normal);
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(30, 64, 175, 0.05);
    transform: translateY(-2px);
}

.nav-link:hover::before {
    width: 80%;
}

.nav-link.active {
    color: var(--primary-color);
    background: rgba(30, 64, 175, 0.1);
}

.nav-link.active::before {
    width: 80%;
}

.nav-auth {
    color: var(--primary-color) !important;
    font-weight: 600;
}

.nav-register {
    background: var(--primary-gradient) !important;
    color: white !important;
    border-radius: var(--radius-md) !important;
    font-weight: 600;
}

.nav-register:hover {
    background: var(--primary-dark) !important;
    color: white !important;
    transform: translateY(-2px) !important;
}

/* 移动端导航切换按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.nav-toggle:hover {
    background: rgba(30, 64, 175, 0.05);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: all var(--transition-normal);
    border-radius: var(--radius-xs);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* 移动端导航菜单 */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
        margin-bottom: var(--spacing-xs);
        border-radius: var(--radius-lg);
        text-align: center;
        font-size: 1rem;
    }
    
    .nav-link::before {
        display: none;
    }
}

/* 产品展示 */
.products-showcase {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.product-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    min-width: 240px;
    transition: all var(--transition-slow);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

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

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: rgba(30, 64, 175, 0.2);
}

.product-card i {
    font-size: 3.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition-normal);
}

.product-card:hover i {
    transform: scale(1.1) rotate(5deg);
}

.product-card h4 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

.product-card:hover h4 {
    color: var(--primary-color);
}

.product-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* QuickPrint 部分 */
.quickprint-section {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.quickprint-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.quickprint-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.quickprint-visual {
    display: flex;
    justify-content: center;
}

/* IoT 部分 */
.iot-section {
    padding: 6rem 0;
    background: white;
}

.iot-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 3rem;
}

.iot-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.iot-visual {
    display: flex;
    justify-content: center;
}

.iot-architecture {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.arch-layer {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    min-width: 150px;
    border: 1px solid var(--border-color);
}

.arch-layer i {
    font-size: 2rem;
    color: var(--success-color);
    margin-bottom: 0.5rem;
}

.arch-layer span {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.arch-arrow {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: bold;
}

.iot-features {
    margin-top: 4rem;
}

.subsection-title {
    font-size: 1.75rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

/* 教育学籍管理平台 */
.education-section {
    padding: 6rem 0;
    background: var(--bg-secondary);
    position: relative;
}

.education-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(5, 150, 105, 0.05) 0%, rgba(14, 165, 233, 0.05) 100%);
    pointer-events: none;
}

.education-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
    position: relative;
    z-index: 1;
}

.education-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.education-visual {
    display: flex;
    justify-content: center;
}

.education-cta {
    text-align: center;
    position: relative;
    z-index: 1;
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.education-cta .btn {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: 1.125rem;
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-normal);
    min-width: 200px;
}

.education-cta .btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl);
}

/* 主页面 */
.hero {
    padding: 8rem 0 6rem;
    background: var(--bg-hero);
    position: relative;
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(30, 64, 175, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 40rem;
    height: 40rem;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    animation: heroFloat 20s ease-in-out infinite;
}

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

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    background: var(--primary-gradient);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-colored);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.8s ease-out 0.1s both;
    transition: all var(--transition-normal);
}

.hero-badge:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.hero-badge i {
    margin-right: var(--spacing-xs);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { 
        transform: scale(1); 
        opacity: 1; 
    }
    50% { 
        transform: scale(1.1); 
        opacity: 0.8; 
    }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    animation: fadeInUp 0.8s ease-out;
}

.hero-title span.highlight {
    display: block;
    font-size: 3rem;
    font-weight: 600;
    margin-top: var(--spacing-xs);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.hero-title span.highlight::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    animation: expandWidth 1.2s ease-out 0.5s both;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
    max-width: 90%;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

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

@keyframes expandWidth {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-actions .btn {
    position: relative;
    overflow: hidden;
}

.hero-actions .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;
}

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

.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-colored);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-2xl);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-tertiary {
    background: rgba(30, 64, 175, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(30, 64, 175, 0.2);
    backdrop-filter: blur(10px);
}

.btn-tertiary:hover {
    background: rgba(30, 64, 175, 0.2);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: 1.125rem;
    border-radius: var(--radius-xl);
}

/* 按钮波纹效果 */
.btn .ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.6);
    pointer-events: none;
    transform: scale(0);
    animation: ripple-animation 0.6s linear;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* 工作流程图 */
.workflow-diagram {
    background: white;
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.workflow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-width: 120px;
}

.workflow-step i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.workflow-step span {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.workflow-arrow {
    font-size: 1.5rem;
    color: var(--text-muted);
    font-weight: bold;
}

/* 区块标题 */
.section-title {
    font-size: 2.75rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    color: var(--text-primary);
    letter-spacing: -0.02em;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -var(--spacing-sm);
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-subtitle {
    font-size: 1.375rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-md);
    font-weight: 400;
    line-height: 1.6;
}

/* 核心价值 */
.benefits {
    padding: 6rem 0;
    background: var(--bg-secondary);
    position: relative;
}

.benefits::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="1" opacity="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>') center/50px;
    opacity: 0.3;
    pointer-events: none;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.benefit-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-slow);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.benefit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(30, 64, 175, 0.03), transparent);
    transition: left 0.6s ease;
}

.benefit-card:hover::before {
    left: 100%;
}

.benefit-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: rgba(30, 64, 175, 0.15);
}

.benefit-icon {
    width: 4rem;
    height: 4rem;
    background: var(--primary-gradient);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-colored);
    transition: all var(--transition-normal);
}

.benefit-card:hover .benefit-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-xl);
}

.benefit-icon i {
    font-size: 1.5rem;
    color: white;
}

.benefit-card h3 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

.benefit-card:hover h3 {
    color: var(--primary-color);
}

.benefit-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1rem;
}

/* 功能矩阵 */
.features {
    padding: 6rem 0;
    background: white;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--spacing-xl);
}

.feature-category {
    background: var(--bg-secondary);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.feature-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.feature-category:hover::before {
    transform: scaleX(1);
}

.feature-category:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
    background: white;
    border-color: rgba(30, 64, 175, 0.2);
}

.category-header {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.category-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 1rem;
}

.category-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    line-height: 1.6;
    position: relative;
    padding-left: 1.5rem;
}

.feature-list li::before {
    content: '•';
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* 应用场景 */
.scenarios {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.scenario-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
    border: 1px solid var(--border-light);
}

.scenario-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.scenario-icon {
    width: 4rem;
    height: 4rem;
    background: linear-gradient(135deg, var(--accent-color), #f97316);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.scenario-icon i {
    font-size: 1.75rem;
    color: white;
}

.scenario-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.scenario-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.scenario-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.feature-tag {
    background: var(--bg-tertiary);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

/* 技术规格 */
.tech-specs {
    padding: 6rem 0;
    background: white;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.spec-category {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
}

.spec-category h4 {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.spec-category h4 i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

.spec-category p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 部署模式 */
.deployment {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.deployment-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.deployment-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
    border: 1px solid var(--border-light);
}

.deployment-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.deployment-icon {
    width: 4rem;
    height: 4rem;
    background: linear-gradient(135deg, var(--success-color), #059669);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.deployment-icon i {
    font-size: 1.75rem;
    color: white;
}

.deployment-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.deployment-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 联系我们 */
.contact {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.contact-info h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.contact-info p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    line-height: 1.7;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.125rem;
}

.contact-method i {
    width: 1.5rem;
    text-align: center;
}

.contact-cta {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact .btn-primary {
    background: white;
    color: var(--primary-color);
}

.contact .btn-primary:hover {
    background: var(--bg-secondary);
}

.contact .btn-secondary {
    border-color: white;
    color: white;
}

.contact .btn-secondary:hover {
    background: white;
    color: var(--primary-color);
}

/* 页脚 */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 2rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 700;
}

.footer-brand i {
    margin-right: 0.5rem;
    font-size: 1.5rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* 页面加载动画 */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

.loader-text {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

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

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* 选择文本样式 */
::selection {
    background: rgba(30, 64, 175, 0.2);
    color: var(--text-primary);
}

::-moz-selection {
    background: rgba(30, 64, 175, 0.2);
    color: var(--text-primary);
}

/* 减少移动端动画以提升性能 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 认证页面样式 */
.auth-section {
    min-height: 100vh;
    padding: 6rem 0 2rem;
    background: var(--bg-gradient);
    display: flex;
    align-items: center;
}

.auth-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.auth-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.auth-hero {
    text-align: center;
    max-width: 400px;
}

.auth-brand {
    margin-bottom: var(--spacing-2xl);
}

.auth-brand i {
    font-size: 4rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    display: block;
}

.auth-brand h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.auth-brand p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.auth-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.feature-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    min-width: 24px;
}

.feature-item span {
    color: var(--text-secondary);
    font-weight: 500;
}

.auth-form-container {
    display: flex;
    justify-content: center;
}

.auth-form {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
    width: 100%;
    max-width: 480px;
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.auth-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

.form-group label i {
    font-size: 1rem;
    color: var(--primary-color);
    min-width: 16px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    transition: all var(--transition-normal);
    background: var(--bg-color);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.password-input {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: color var(--transition-normal);
}

.password-toggle:hover {
    color: var(--primary-color);
}

.password-strength {
    margin-top: var(--spacing-xs);
}

.strength-bar {
    height: 4px;
    background: var(--border-light);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.strength-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    width: 0%;
    background: var(--error-color);
}

.strength-fill.weak { 
    width: 25%; 
    background: var(--error-color); 
}

.strength-fill.fair { 
    width: 50%; 
    background: var(--warning-color); 
}

.strength-fill.good { 
    width: 75%; 
    background: var(--accent-color); 
}

.strength-fill.strong { 
    width: 100%; 
    background: var(--success-color); 
}

.strength-text {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: normal !important;
    margin-bottom: 0 !important;
    cursor: pointer;
    font-size: 0.95rem;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: white;
    font-size: 0.75rem;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-normal);
}

.forgot-password:hover {
    color: var(--primary-dark);
}

.form-error {
    color: var(--error-color);
    font-size: 0.8rem;
    margin-top: var(--spacing-xs);
    display: none;
}

.form-error.show {
    display: block;
}

.auth-submit {
    width: 100%;
    margin-bottom: var(--spacing-lg);
}

.auth-divider {
    text-align: center;
    margin: var(--spacing-lg) 0;
    position: relative;
}

.auth-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.auth-divider span {
    background: white;
    padding: 0 var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.social-login {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.btn-social {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
    background: white;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
}

.btn-wechat:hover {
    border-color: #07c160;
    color: #07c160;
}

.btn-qq:hover {
    border-color: #12b7f5;
    color: #12b7f5;
}

.auth-switch {
    text-align: center;
}

.auth-switch p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.auth-switch a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.auth-switch a:hover {
    color: var(--primary-dark);
}

.auth-footer {
    margin-top: 0;
    background: var(--bg-secondary);
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .benefit-card:hover,
    .feature-category:hover,
    .scenario-card:hover,
    .deployment-card:hover,
    .product-card:hover {
        transform: none;
    }
    
    .nav-link:hover {
        transform: none;
        background: none;
    }
    
    .btn:hover {
        transform: none;
    }
}

/* 响应式设计 */
/* 认证页面移动端优化 */
@media (max-width: 768px) {
    .auth-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        padding: 0 var(--spacing-sm);
    }
    
    .auth-visual {
        order: 2;
    }
    
    .auth-form-container {
        order: 1;
    }
    
    .auth-form {
        padding: var(--spacing-lg);
        margin: 0;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .social-login {
        grid-template-columns: 1fr;
    }
    
    .auth-features {
        display: none;
    }
    
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-container,
    .quickprint-content,
    .iot-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats,
    .quickprint-stats,
    .iot-stats {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-actions {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .workflow-diagram {
        flex-direction: column;
        gap: 1rem;
    }
    
    .workflow-arrow {
        transform: rotate(90deg);
    }
    
    .benefits-grid,
    .features-grid,
    .scenarios-grid,
    .specs-grid,
    .deployment-options {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .contact-cta {
        align-items: center;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .products-showcase {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 6rem 0 4rem;
        min-height: 80vh;
    }
    
    .hero-title {
        font-size: 2.25rem;
        line-height: 1.2;
    }
    
    .hero-title span.highlight {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
        max-width: 100%;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
    
    .hero-actions .btn {
        width: 100%;
        justify-content: center;
        max-width: 280px;
    }
    
    .section-title {
        font-size: 2.25rem;
        line-height: 1.2;
    }
    
    .section-subtitle {
        font-size: 1.125rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-container {
        padding: 0 var(--spacing-sm);
        gap: var(--spacing-xl);
    }
    
    .workflow-diagram {
        padding: var(--spacing-md);
    }
    
    .workflow-step {
        min-width: 100px;
    }
    
    .workflow-step i {
        font-size: 1.75rem;
    }
    
    .workflow-step span {
        font-size: 0.8rem;
    }
    
    .benefit-card,
    .feature-category,
    .scenario-card,
    .deployment-card {
        padding: var(--spacing-lg);
    }
    
    .product-card {
        min-width: 100%;
        padding: var(--spacing-lg);
    }
    
    .products-showcase {
        gap: var(--spacing-md);
    }
    
    .hero-stats,
    .quickprint-stats,
    .iot-stats,
    .education-stats {
        gap: var(--spacing-sm);
    }
    
    .stat-item {
        text-align: center;
        min-width: 80px;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
    
    .contact-content {
        gap: var(--spacing-lg);
    }
    
    .contact-cta {
        gap: var(--spacing-sm);
    }
    
    .contact-cta .btn {
        width: 100%;
        justify-content: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
    
    /* 移动端专用优化 */
    .nav-container {
        padding: 0 var(--spacing-sm);
    }
    
    .nav-brand {
        font-size: 1.25rem;
    }
    
    .nav-brand i {
        font-size: 1.5rem;
    }
    
    /* 触摸友好的按钮尺寸 */
    .btn {
        min-height: 48px;
        padding: var(--spacing-sm) var(--spacing-lg);
    }
    
    .btn-large {
        min-height: 56px;
        padding: var(--spacing-md) var(--spacing-xl);
    }
    
    /* 滚动到顶部按钮移动端位置 */
    .scroll-top-btn {
        bottom: 20px !important;
        right: 20px !important;
        width: 45px !important;
        height: 45px !important;
        font-size: 16px !important;
    }
}