/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Remove default focus outline for all elements */
*:focus {
    outline: none;
}

/* Add custom focus styles for accessibility */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

:root {
    /* 主色调 - 基于Telegram蓝色 */
    --primary-color: #2196F3;
    --primary-dark: #1976D2;
    --primary-light: #42A5F5;
    --primary-lighter: #64B5F6;
    --primary-lightest: #90CAF9;

    /* 辅助色 */
    --secondary-color: #4CAF50;
    --secondary-dark: #388E3C;
    --secondary-light: #66BB6A;
    --accent-color: #FF9800;
    --accent-dark: #F57C00;
    --accent-light: #FFB74D;

    /* 文字颜色层级 */
    --text-primary: #1a1a1a;
    --text-secondary: #333333;
    --text-body: #4a4a4a;
    --text-light: #666666;
    --text-muted: #999999;
    --text-disabled: #cccccc;
    --text-white: #ffffff;

    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7fa;
    --bg-light: #f8f9fb;
    --bg-dark: #1a1a1a;
    --bg-overlay: rgba(0, 0, 0, 0.5);

    /* 边框色 */
    --border-light: #e0e0e0;
    --border-medium: #d0d0d0;
    --border-dark: #b0b0b0;

    /* 间距系统 (8px基准) */
    --spacing-xs: 0.25rem;   /* 4px */
    --spacing-sm: 0.5rem;    /* 8px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */
    --spacing-3xl: 4rem;     /* 64px */
    --spacing-4xl: 6rem;     /* 96px */

    /* 字体系统 */
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-family-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;

    /* 字体大小 */
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    --font-size-5xl: 3rem;      /* 48px */

    /* 字体粗细 */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    /* 行高 */
    --line-height-tight: 1.2;
    --line-height-normal: 1.6;
    --line-height-relaxed: 1.8;

    /* 圆角 */
    --radius-sm: 0.25rem;    /* 4px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-2xl: 1.5rem;    /* 24px */
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --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-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-hover: 0 5px 20px rgba(0, 0, 0, 0.15);

    /* 过渡动画 */
    --transition-fast: all 0.15s ease;
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;

    /* 响应式断点 */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-body);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* 保留原始的.container样式以保持兼容性 */
.container {
    max-width: var(--breakpoint-xl);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

@media (max-width: 768px) {
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    h3 { font-size: var(--font-size-xl); }
    h4 { font-size: var(--font-size-lg); }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: var(--font-size-base);
    /* 触摸目标优化 */
    min-height: 44px;
    position: relative;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

/* 扩大点击区域 */
.btn::before {
    content: '';
    position: absolute;
    top: -8px;
    left: -8px;
    right: -8px;
    bottom: -8px;
    /* 仅用于增加点击区域，不影响视觉 */
}

/* 触摸反馈 */
.btn:active {
    transform: scale(0.95);
    transition: transform 0.1s;
}

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

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

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

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

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border-light);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-md);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
}

.nav-brand i {
    font-size: var(--font-size-3xl);
}

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

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: var(--transition);
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-secondary);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    padding: 140px 0 100px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-primary) 100%);
    display: flex;
    align-items: center;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
    position: relative;
    z-index: 2;
}

.hero-content {
    flex: 1 1 50%;
    max-width: 600px;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 50%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: var(--font-weight-extra-bold);
}

.hero-content p {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    line-height: 1.6;
    color: var(--text-body);
    margin-bottom: 3rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

/* Enhanced CTA Button Styles */
.hero-buttons .btn {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    border-radius: 50px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.hero-buttons .btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(33, 150, 243, 0.3);
}

.hero-buttons .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(33, 150, 243, 0.4);
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
}

.hero-buttons .btn-primary:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
}

.hero-buttons .btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    position: relative;
}

.hero-buttons .btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: var(--primary-color);
    transition: width 0.3s ease;
    z-index: -1;
}

.hero-buttons .btn-secondary:hover {
    color: white;
    border-color: var(--primary-dark);
    transform: translateY(-3px);
}

.hero-buttons .btn-secondary:hover::before {
    width: 100%;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-light);
}

.stat {
    text-align: left;
}

.stat h3 {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    line-height: 1;
}

.stat p {
    color: var(--text-light);
    font-size: 1rem;
}

/* Hero Image Section */
.hero-image {
    flex: 1 1 50%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-width: 300px;
    /* 确保容器背景透明 */
    background: transparent !important;
}

.hero-screenshot {
    width: 100%;
    max-width: 600px;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

/* 移除hero-image的伪元素背景装饰 */
.hero-image::before,
.hero-image::after {
    display: none !important;
}

.hero-screenshot:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.2);
}

/* iPhone Mockup */
.iphone-mockup {
    position: relative;
    text-align: center;
    width: 100%;
    max-width: 450px;  /* 增大容器宽度 */
    margin: 0 auto;
}

/* iPhone图片框架 - 完全移除背景 */
.iphone-frame {
    position: relative;
    width: 100%;
    /* 移除所有背景设置 */
    background: none !important;
    /* 移除边框和圆角 */
    border-radius: 0;
    overflow: visible;
    /* 移除盒子阴影 */
    box-shadow: none;
}

.mockup-device {
    width: 100%;
    max-width: 450px;  /* 增大图片最大宽度 */
    height: auto;
    display: block;
    margin: 0 auto;
    /* 确保图片背景完全透明 */
    background: transparent !important;
    /* 使用drop-shadow而不是box-shadow，这样只会给非透明部分加阴影 */
    filter: drop-shadow(0 25px 50px rgba(0, 0, 0, 0.25));  /* 增大阴影效果 */
    animation: float 6s ease-in-out infinite;
    /* 移除任何位置调整 */
    position: static;
    transform: none;
}

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

.bot-info {
    margin-top: -0.5rem;  /* 使用负margin让它与手机底部更贴近 */
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.95);  /* 稍微提高不透明度 */
    backdrop-filter: blur(10px);
    border-radius: 50px;
    display: inline-block;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 10;  /* 确保它在手机图片之上 */
}

.bot-info p {
    margin: 0;
    font-size: 1rem;
    color: var(--text-secondary);
}

.bot-info a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.bot-info a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.phone-mockup {
    position: relative;
    width: 300px;
    height: 600px;
    background: #1a1a1a;
    border-radius: 30px;
    padding: 10px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
    margin: 0 auto;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 20px;
    overflow: hidden;
}

.phone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Hero Background */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.gradient-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at top right, rgba(33, 150, 243, 0.05) 0%, transparent 50%),
                radial-gradient(ellipse at bottom left, rgba(255, 152, 0, 0.03) 0%, transparent 50%);
}

.pattern-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0.03;
    background-image:
        linear-gradient(30deg, var(--primary-color) 12%, transparent 12.5%, transparent 87%, var(--primary-color) 87.5%, var(--primary-color)),
        linear-gradient(150deg, var(--primary-color) 12%, transparent 12.5%, transparent 87%, var(--primary-color) 87.5%, var(--primary-color)),
        linear-gradient(30deg, var(--primary-color) 12%, transparent 12.5%, transparent 87%, var(--primary-color) 87.5%, var(--primary-color)),
        linear-gradient(150deg, var(--primary-color) 12%, transparent 12.5%, transparent 87%, var(--primary-color) 87.5%, var(--primary-color)),
        linear-gradient(60deg, var(--primary-light) 25%, transparent 25.5%, transparent 75%, var(--primary-light) 75%, var(--primary-light)),
        linear-gradient(60deg, var(--primary-light) 25%, transparent 25.5%, transparent 75%, var(--primary-light) 75%, var(--primary-light));
    background-size: 80px 140px;
    background-position: 0 0, 0 0, 40px 70px, 40px 70px, 0 0, 40px 70px;
}

/* Sections */
section {
    padding: 80px 0;
}

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

.section-header h2 {
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-light);
}

/* Features Section - 机器人功能展示 */
.features {
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

/* 功能展示区容器 */
.features-showcase {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    margin-top: var(--spacing-3xl);
}

/* 功能选择器 */
.features-selector {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    background: var(--bg-light);
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
}

/* 功能项 */
.feature-item {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
}

.feature-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.feature-item.active {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 4px 20px rgba(33, 150, 243, 0.3);
}

.feature-item .feature-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.feature-item.active .feature-icon {
    background: rgba(255, 255, 255, 0.2);
}

.feature-item .feature-icon i {
    font-size: var(--font-size-xl);
    color: white;
}

.feature-item h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    margin: 0;
}

/* 功能详情区 */
.features-detail {
    position: relative;
    min-height: 500px;
}

.feature-detail {
    display: none;
    padding: var(--spacing-3xl);
}

.feature-detail.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

/* 详情图片 */
.detail-image {
    position: relative;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 0;
    box-shadow: var(--shadow-sm);
    text-align: center;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.detail-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-lg);
}

/* 详情信息 */
.detail-info h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.detail-info > p {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    color: var(--text-body);
    margin-bottom: var(--spacing-2xl);
}

/* 详情特性列表 */
.detail-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.detail-feature {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.detail-feature:hover {
    background: white;
    box-shadow: var(--shadow-sm);
    transform: translateX(5px);
}

.detail-feature i {
    font-size: var(--font-size-xl);
    color: var(--secondary-color);
    flex-shrink: 0;
}

.detail-feature h5 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.detail-feature p {
    font-size: var(--font-size-sm);
    color: var(--text-body);
    margin: 0;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .features-selector {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .features-selector {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
        padding: var(--spacing-md);
    }

    .feature-item {
        padding: var(--spacing-md);
    }

    .feature-item .feature-icon {
        width: 40px;
        height: 40px;
    }

    .feature-detail {
        padding: var(--spacing-xl);
    }

    .detail-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .detail-image {
        height: 300px;
    }

    .detail-info h3 {
        font-size: var(--font-size-xl);
    }

    .detail-info > p {
        font-size: var(--font-size-base);
    }
}

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

/* 功能区装饰性背景 */
.features::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--primary-lightest) 0%, transparent 70%);
    opacity: 0.3;
    pointer-events: none;
}

.features::after {
    content: '';
    position: absolute;
    bottom: -150px;
    left: -150px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-light) 0%, transparent 70%);
    opacity: 0.2;
    pointer-events: none;
}

/* 响应式网格布局 - 旧版本已注释
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    position: relative;
    z-index: 1;
}
*/

/* 平板端：2列 */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

/* 移动端：1列 */
@media (max-width: 640px) {
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

/* 功能卡片基础样式 */
.feature-card {
    background: var(--bg-primary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

/* 卡片装饰性渐变边框 */
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--primary-light) 50%, var(--accent-color) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* 卡片悬停效果 */
.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
    border-color: rgba(33, 150, 243, 0.2);
    background: white;
}

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

/* 功能图标容器 */
.feature-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
}

/* 图标背景光晕效果 */
.feature-icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

/* 悬停时图标效果 */
.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
}

.feature-card:hover .feature-icon::after {
    opacity: 0.3;
}

/* 图标样式 */
.feature-icon i {
    font-size: var(--font-size-2xl);
    color: var(--text-white);
    z-index: 1;
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-icon i {
    transform: scale(1.1);
}

/* 功能标题 */
.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    transition: color 0.3s ease;
}

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

/* 功能描述 */
.feature-card p {
    color: var(--text-body);
    line-height: var(--line-height-relaxed);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-lg);
}

/* 功能特性列表 */
.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    color: var(--text-light);
    font-size: var(--font-size-sm);
    transition: all 0.2s ease;
}

.feature-list li:not(:last-child) {
    border-bottom: 1px solid var(--border-light);
}

.feature-list li i {
    color: var(--secondary-color);
    font-size: var(--font-size-sm);
    transition: transform 0.2s ease;
}

.feature-card:hover .feature-list li {
    color: var(--text-secondary);
}

.feature-card:hover .feature-list li i {
    transform: translateX(3px);
}

/* 功能标签（可选） */
.feature-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--accent-color);
    color: var(--text-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 特色功能卡片（强调） */
.feature-card.featured {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--text-white);
    transform: scale(1.05);
}

.feature-card.featured h3,
.feature-card.featured p,
.feature-card.featured .feature-list li {
    color: var(--text-white);
}

.feature-card.featured .feature-icon {
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.feature-card.featured:hover {
    transform: scale(1.05) translateY(-8px);
}

/* 加载动画 */
@keyframes featureCardSlideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card {
    animation: featureCardSlideIn 0.6s ease forwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }
.feature-card:nth-child(7) { animation-delay: 0.7s; }
.feature-card:nth-child(8) { animation-delay: 0.8s; }

/* 功能特定的图标颜色方案 */
/* 商品管理 */
.feature-card[data-feature="products"] .feature-icon {
    background: linear-gradient(135deg, #FF6B6B 0%, #EE5A24 100%);
}

/* 订单处理 */
.feature-card[data-feature="orders"] .feature-icon {
    background: linear-gradient(135deg, #4ECDC4 0%, #44A08D 100%);
}

/* 自动发货 */
.feature-card[data-feature="delivery"] .feature-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* 支付系统 */
.feature-card[data-feature="payment"] .feature-icon {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

/* 客户服务 */
.feature-card[data-feature="support"] .feature-icon {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* 营销工具 */
.feature-card[data-feature="marketing"] .feature-icon {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

/* 数据分析 */
.feature-card[data-feature="analytics"] .feature-icon {
    background: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
}

/* 安全保护 */
.feature-card[data-feature="security"] .feature-icon {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

/* 扩展功能卡片布局（详细展示） */
.feature-card.expanded {
    grid-column: span 2;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

@media (max-width: 1024px) {
    .feature-card.expanded {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }
}

.feature-card.expanded .feature-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* 功能展示标签页 */
.feature-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-light);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.feature-tab {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.feature-tab:hover {
    color: var(--primary-color);
    background: rgba(33, 150, 243, 0.05);
}

.feature-tab.active {
    color: var(--primary-color);
    background: rgba(33, 150, 243, 0.1);
    border-color: var(--primary-color);
}

/* 功能对比表格 */
.feature-comparison {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.feature-comparison-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--spacing-md);
    align-items: center;
}

@media (max-width: 768px) {
    .feature-comparison-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

.feature-comparison-header {
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    text-align: center;
}

.feature-comparison-item {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

/* 功能演示区 */
.feature-demo {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.feature-demo::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--accent-color) 100%);
}

.feature-demo-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

@media (max-width: 768px) {
    .feature-demo-content {
        flex-direction: column;
    }
}

/* 功能统计数字 */
.feature-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    text-align: center;
}

.feature-stat {
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.feature-stat:hover {
    background: var(--bg-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.feature-stat-number {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.feature-stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 功能时间线 */
.feature-timeline {
    position: relative;
    padding-left: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.feature-timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-light);
}

.feature-timeline-item {
    position: relative;
    padding-bottom: var(--spacing-xl);
}

.feature-timeline-dot {
    position: absolute;
    left: -28px;
    top: 4px;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 4px var(--bg-secondary);
}

.feature-timeline-content {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

/* 功能工作流程 */
.feature-workflow {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    overflow-x: auto;
}

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

.workflow-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 40px;
    right: -40px;
    width: 80px;
    height: 2px;
    background: var(--border-light);
    z-index: 0;
}

.workflow-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.workflow-icon i {
    font-size: var(--font-size-2xl);
    color: var(--text-white);
}

.workflow-label {
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .feature-workflow {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

    .workflow-step:not(:last-child)::after {
        display: none;
    }
}

/* Showcase Section */
.showcase {
    background: white;
}

.showcase-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.tab-btn {
    padding: 12px 24px;
    background: transparent;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

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

.showcase-image {
    background: var(--bg-light);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 1rem;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.showcase-image img {
    max-width: 100%;
    max-height: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

/* Payment Flow */
.payment-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    padding: 2rem 0;
}

.flow-item {
    text-align: center;
    flex: 1;
    min-width: 200px;
}

.flow-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.flow-icon i {
    font-size: 2rem;
    color: white;
}

.flow-arrow {
    font-size: 2rem;
    color: #e0e0e0;
}

/* ========================================
   技术优势展示区域 (Tech Section)
   ======================================== */

.tech {
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
    padding: var(--spacing-4xl) 0;
}

/* Tech Section - 技术优势 */
.tech {
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
    padding: var(--spacing-4xl) 0;
}

/* 技术优势网格布局 */
.tech-advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

/* 技术卡片 */
.tech-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-align: center;
}

.tech-card:focus {
    outline: none;
}

/* 修复tech-card的focus-visible样式 */
.tech-card:focus-visible {
    outline: none;
}

/* 移除tech-card不必要的交互样式 */
.tech-card {
    cursor: default;
    user-select: auto;
}

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

/* 技术图标 */
.tech-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-icon i {
    font-size: 2.5rem;
    color: white;
}

/* 技术标题和描述 */
.tech-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.tech-card p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* 技术指标 */
.tech-metrics {
    display: flex;
    justify-content: space-around;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-light);
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

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

/* 技术特性标签 */
.tech-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 1rem;
}

.tech-features span {
    padding: 0.25rem 0.75rem;
    background: var(--bg-light);
    border-radius: 15px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .tech-advantages {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .tech-metrics {
        flex-direction: column;
        gap: 1rem;
    }
}

/* 科技感网格背景 */
.tech::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 100px,
            rgba(33, 150, 243, 0.03) 100px,
            rgba(33, 150, 243, 0.03) 101px
        ),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 100px,
            rgba(33, 150, 243, 0.03) 100px,
            rgba(33, 150, 243, 0.03) 101px
        );
    z-index: 0;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(100px, 100px); }
}

/* 装饰性光效 */
.tech::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(30, 144, 255, 0.1) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    animation: pulse 4s ease-in-out infinite;
    pointer-events: none;
}

/* 技术栈分类容器 */
.tech-stack {
    position: relative;
    z-index: 1;
}

/* 技术分类 */
.tech-category {
    margin-bottom: var(--spacing-3xl);
}

.tech-category h3 {
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    position: relative;
    display: inline-block;
}

/* 分类标题装饰线 */
.tech-category h3::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--accent-color) 100%);
    border-radius: 2px;
}

/* 技术项目网格 */
.tech-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

/* 技术卡片 */
.tech-item {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(33, 150, 243, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tech-item:focus {
    outline: none;
}

/* 卡片悬停效果 */
.tech-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(33, 150, 243, 0.2);
    border-color: rgba(33, 150, 243, 0.3);
    background: rgba(255, 255, 255, 1);
}

/* 技术图标容器 */
.tech-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1) 0%, rgba(30, 144, 255, 0.2) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all 0.3s ease;
}

/* 图标 */
.tech-icon i {
    font-size: var(--font-size-3xl);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform 0.3s ease;
}

/* 悬停时图标效果 */
.tech-item:hover .tech-icon {
    transform: rotate(10deg);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.tech-item:hover .tech-icon i {
    transform: scale(1.1);
    -webkit-text-fill-color: white;
}

/* 技术名称 */
.tech-item h4 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

/* 技术描述 */
.tech-item p {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    line-height: var(--line-height-relaxed);
}

/* 性能指标展示 */
.tech-stats {
    margin-top: var(--spacing-3xl);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.tech-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

/* 性能指标项 */
.stat-item {
    text-align: center;
    position: relative;
}

/* 进度环 */
.stat-circle {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-md);
    position: relative;
}

.stat-circle svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.stat-circle circle {
    fill: none;
    stroke-width: 8;
}

.stat-circle .bg-circle {
    stroke: var(--bg-secondary);
}

.stat-circle .progress-circle {
    stroke: url(#techGradient);
    stroke-linecap: round;
    stroke-dasharray: 339.29;
    stroke-dashoffset: 339.29;
    animation: fillProgress 1.5s ease-out forwards;
}

/* 渐变定义 */
.tech-gradients {
    position: absolute;
    width: 0;
    height: 0;
}

/* 百分比文字 */
.stat-percentage {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
}

/* 指标标题 */
.stat-label {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
}

/* 指标说明 */
.stat-desc {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-top: var(--spacing-xs);
}

/* 技术特性徽章 */
.tech-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--accent-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 技术对比表格 */
.tech-comparison {
    margin-top: var(--spacing-3xl);
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.comparison-table thead {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.comparison-table th {
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
}

.comparison-table td {
    font-size: var(--font-size-sm);
}

.comparison-table tr:hover {
    background: var(--bg-light);
}

/* 对比优势标记 */
.advantage {
    color: var(--secondary-color);
    font-weight: var(--font-weight-semibold);
}

.disadvantage {
    color: var(--text-light);
}

/* 技术图标特定样式 */
/* Go语言 */
.tech-item[data-tech="golang"] .tech-icon {
    background: linear-gradient(135deg, #00ADD8 0%, #007D9C 100%);
}

/* Docker */
.tech-item[data-tech="docker"] .tech-icon {
    background: linear-gradient(135deg, #2496ED 0%, #1D63ED 100%);
}

/* PostgreSQL */
.tech-item[data-tech="postgresql"] .tech-icon {
    background: linear-gradient(135deg, #336791 0%, #2F5B85 100%);
}

/* Redis */
.tech-item[data-tech="redis"] .tech-icon {
    background: linear-gradient(135deg, #DC382D 0%, #B92B21 100%);
}

/* Nginx */
.tech-item[data-tech="nginx"] .tech-icon {
    background: linear-gradient(135deg, #009639 0%, #007829 100%);
}

/* React */
.tech-item[data-tech="react"] .tech-icon {
    background: linear-gradient(135deg, #61DAFB 0%, #21A1F1 100%);
}

/* 动画效果 */
@keyframes fillProgress {
    to {
        stroke-dashoffset: var(--progress-offset, 0);
    }
}

/* 技术卡片入场动画 */
.tech-item {
    opacity: 0;
    animation: techCardSlideIn 0.6s ease forwards;
}

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

.tech-item:nth-child(1) { animation-delay: 0.1s; }
.tech-item:nth-child(2) { animation-delay: 0.2s; }
.tech-item:nth-child(3) { animation-delay: 0.3s; }
.tech-item:nth-child(4) { animation-delay: 0.4s; }
.tech-item:nth-child(5) { animation-delay: 0.5s; }
.tech-item:nth-child(6) { animation-delay: 0.6s; }

/* 技术区域响应式设计 */
@media (max-width: 1024px) {
    .tech-items {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: var(--spacing-lg);
    }

    .tech-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tech::after {
        width: 400px;
        height: 400px;
    }
}

@media (max-width: 768px) {
    .tech {
        padding: var(--spacing-3xl) 0;
    }

    .tech-category h3 {
        font-size: var(--font-size-xl);
    }

    .tech-items {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .tech-item {
        padding: var(--spacing-lg);
    }

    .tech-icon {
        width: 60px;
        height: 60px;
        border-radius: 16px;
    }

    .tech-icon i {
        font-size: var(--font-size-2xl);
    }

    .tech-stats {
        padding: var(--spacing-lg);
    }

    .stat-circle {
        width: 100px;
        height: 100px;
    }

    .stat-percentage {
        font-size: var(--font-size-xl);
    }

    .comparison-table {
        font-size: var(--font-size-sm);
    }

    .comparison-table th,
    .comparison-table td {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .tech-items {
        grid-template-columns: 1fr;
    }

    .tech-stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* ========================================
   托管服务展示区域 (Deployment Section)
   ======================================== */

.deployment {
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
    padding: var(--spacing-4xl) 0;
}

/* 托管服务介绍 */
.managed-hosting-intro {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.hosting-tagline {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
}

/* 托管服务特性网格 */
.managed-features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

/* 托管服务卡片 */
.managed-feature-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.managed-feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* 托管服务图标 */
.managed-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
}

.managed-icon i {
    font-size: var(--font-size-3xl);
    color: white;
}

.managed-feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.managed-feature-card > p {
    font-size: var(--font-size-base);
    color: var(--text-body);
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-relaxed);
}

/* 托管服务优势列表 */
.managed-benefits {
    list-style: none;
    padding: 0;
    margin: 0;
}

.managed-benefits li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.managed-benefits i {
    color: var(--secondary-color);
    font-size: var(--font-size-base);
}

/* 服务流程 */
.service-process {
    background: var(--bg-light);
    border-radius: var(--radius-xl);
    padding: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
}

.service-process h3 {
    text-align: center;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-2xl);
    color: var(--text-primary);
}

/* 流程时间线 */
.process-timeline {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 30px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-light) 0%, var(--primary-color) 50%, var(--primary-light) 100%);
    z-index: 0;
}

.process-item {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 1;
}

.process-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin: 0 auto var(--spacing-md);
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
}

.process-item h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.process-item p {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    max-width: 200px;
    margin: 0 auto;
}

/* 服务承诺 */
.service-promise {
    text-align: center;
}

.service-promise h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.promise-items {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    flex-wrap: wrap;
}

.promise-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.promise-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.promise-item i {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
}

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

/* 响应式 */
@media (max-width: 1024px) {
    .managed-features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .process-timeline {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

    .process-timeline::before {
        top: 0;
        bottom: 0;
        left: 30px;
        right: auto;
        width: 2px;
        height: calc(100% - 60px);
    }

    .process-item {
        display: flex;
        align-items: center;
        text-align: left;
        gap: var(--spacing-lg);
    }

    .process-number {
        flex-shrink: 0;
    }
}

@media (max-width: 768px) {
    .promise-items {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .promise-item {
        width: 100%;
        justify-content: center;
    }
}


/* Pricing Section */
.pricing {
    background: white;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.pricing-card {
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background: var(--accent-color);
    color: white;
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin-bottom: 2rem;
}

.currency {
    font-size: 1.5rem;
    color: var(--text-light);
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0 5px;
}

.period {
    color: var(--text-light);
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.pricing-features i {
    color: var(--secondary-color);
}

.pricing-features .fa-times {
    color: #e0e0e0;
}

/* Custom Pricing Section */
.pricing-custom-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(320px, 400px));
    gap: 2rem;
    margin: 3rem auto;
    justify-content: center;
}

.custom-option-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-align: center;
}

.custom-option-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.option-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.option-icon i {
    font-size: 2.5rem;
    color: white;
}

.custom-option-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.option-list {
    list-style: none;
    padding: 0;
    text-align: left;
}

.option-list li {
    padding: 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

.option-list i {
    color: var(--secondary-color);
    font-size: 1.1rem;
}

/* Custom Process */
.custom-process {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 3rem;
    margin: 3rem 0;
}

.custom-process h3 {
    text-align: center;
    font-size: 1.75rem;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    position: relative;
}

.process-step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
}

.process-step h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.process-step p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* Process Steps Connection Line */
@media (min-width: 768px) {
    .process-step:not(:last-child)::after {
        content: '';
        position: absolute;
        top: 30px;
        left: 60%;
        width: calc(100% - 20%);
        height: 2px;
        background: linear-gradient(90deg, var(--primary-color) 0%, var(--primary-light) 100%);
        z-index: -1;
    }
}

/* Pricing CTA */
.pricing-cta {
    text-align: center;
    padding: 3rem;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    border-radius: var(--radius-lg);
    color: white;
    margin-top: 3rem;
}

.pricing-cta h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: white;
}

.pricing-cta p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.pricing-cta .cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Responsive */
@media (max-width: 768px) {
    .pricing-custom-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .process-steps {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .process-step::after {
        display: none;
    }

    .pricing-cta {
        padding: 2rem;
    }

    .pricing-cta h3 {
        font-size: 1.5rem;
    }

    .pricing-cta p {
        font-size: 1rem;
    }
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.cta-content h2 {
    color: white;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* ========================================
   联系转化模块 (Contact Section)
   强调转化率和用户体验
   ======================================== */

.contact {
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
    padding: var(--spacing-4xl) 0;
}

/* 装饰性背景元素 */
.contact::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--primary-lightest) 0%, transparent 70%);
    opacity: 0.3;
    animation: float 10s ease-in-out infinite;
}

.contact::after {
    content: '';
    position: absolute;
    bottom: -150px;
    left: -150px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-light) 0%, transparent 70%);
    opacity: 0.2;
    animation: float 12s ease-in-out infinite reverse;
}

/* 联系方式容器 */
.contact-methods {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2xl);
    max-width: 800px;
    margin: var(--spacing-3xl) auto;
    position: relative;
    z-index: 1;
}

/* 联系卡片 */
.contact-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* 联系图标 */
.contact-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.contact-icon i {
    font-size: var(--font-size-3xl);
    color: white;
}

.contact-card:hover .contact-icon {
    transform: scale(1.1) rotate(10deg);
}

/* Telegram卡片特殊样式 */
.telegram-card {
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.05) 0%, white 100%);
    border: 2px solid transparent;
}

.telegram-card:hover {
    border-color: var(--primary-color);
}

.contact-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.contact-card h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.contact-card p {
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

/* 推荐标签 */
.contact-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--accent-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
}

/* 联系行动按钮 */
.contact-action {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: var(--font-weight-medium);
    transition: all 0.3s ease;
}

.telegram-card:hover .contact-action {
    gap: var(--spacing-md);
}

/* 邮箱卡片 */
.email-card .contact-icon {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-dark) 100%);
}

.contact-email {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

.copy-btn {
    background: transparent;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.3s ease;
    padding: var(--spacing-xs);
}

.copy-btn:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

.email-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

/* 联系部分CTA按钮样式 */
.contact .cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: 2rem 0 3rem;
}

.contact .cta-buttons .btn {
    padding: 1rem 2rem;
}

@media (max-width: 768px) {
    .contact .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .contact .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
}

/* 信任指标 */
.trust-indicators {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--border-light);
}

.trust-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

.trust-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.trust-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--secondary-light) 0%, var(--secondary-color) 100%);
    color: white;
    font-size: var(--font-size-2xl);
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
}

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

.trust-value {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.trust-label {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .contact-methods {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .trust-indicators {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .trust-item {
        flex-direction: row;
        text-align: left;
        gap: var(--spacing-md);
    }

    .trust-icon {
        width: 50px;
        height: 50px;
        font-size: var(--font-size-xl);
        margin-bottom: 0;
    }
}


/* Footer */
.footer {
    background: #1a1a1a;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 2rem;
    border-bottom: 1px solid #333;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
}

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

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-social a {
    color: #ccc;
    font-size: 1.5rem;
    margin-left: 1rem;
    transition: var(--transition);
}

.footer-social a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    color: #666;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top:hover {
    background: #1976D2;
    transform: translateY(-5px);
}

.back-to-top.show {
    display: flex;
}

/* Responsive */
/* Ensure nav toggle is hidden on desktop */
@media (min-width: 769px) {
    .nav-toggle {
        display: none !important;
    }

    .nav-menu {
        display: flex !important;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero .container {
        flex-direction: column;
        text-align: center;
        gap: 3rem;
    }

    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-content h1 {
        font-size: clamp(2rem, 6vw, 2.5rem);
    }

    .hero-content p {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 200px;
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
        gap: 2rem;
    }

    .hero-image {
        order: -1;
        width: 100%;
        max-width: 400px;
        margin: 0 auto;
    }

    .hero-screenshot {
        max-width: 100%;
    }

    .hero-image::before,
    .hero-image::after {
        display: none;
    }

    .features-grid,
    .showcase-grid,
    .pricing-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Animations */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.phone-mockup {
    animation: float 6s ease-in-out infinite;
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Gradient Animation */
@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.gradient-text {
    background-size: 200% 200%;
    animation: gradient 5s ease infinite;
}

/* ========================================
   基础响应式布局系统
   ======================================== */

/* 容器系统 */
.container {
    width: 100%;
    max-width: var(--breakpoint-xl);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

@media (min-width: 640px) {
    .container {
        padding-left: var(--spacing-lg);
        padding-right: var(--spacing-lg);
    }
}

@media (min-width: 768px) {
    .container {
        padding-left: var(--spacing-xl);
        padding-right: var(--spacing-xl);
    }
}

@media (min-width: 1280px) {
    .container {
        padding-left: var(--spacing-2xl);
        padding-right: var(--spacing-2xl);
    }
}

/* 流体容器 */
.container-fluid {
    width: 100%;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

/* 网格系统 */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

/* 响应式网格 */
@media (min-width: 640px) {
    .sm\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .sm\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .sm\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
    .md\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .md\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
    .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .lg\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

/* Flexbox 工具类 */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

/* 对齐 */
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-baseline { align-items: baseline; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-evenly { justify-content: space-evenly; }

/* 间距工具类 */
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }
.gap-2xl { gap: var(--spacing-2xl); }

/* 内边距工具类 */
.p-0 { padding: 0; }
.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }
.p-2xl { padding: var(--spacing-2xl); }
.p-3xl { padding: var(--spacing-3xl); }

.px-0 { padding-left: 0; padding-right: 0; }
.px-xs { padding-left: var(--spacing-xs); padding-right: var(--spacing-xs); }
.px-sm { padding-left: var(--spacing-sm); padding-right: var(--spacing-sm); }
.px-md { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-lg { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }
.px-xl { padding-left: var(--spacing-xl); padding-right: var(--spacing-xl); }
.px-2xl { padding-left: var(--spacing-2xl); padding-right: var(--spacing-2xl); }

.py-0 { padding-top: 0; padding-bottom: 0; }
.py-xs { padding-top: var(--spacing-xs); padding-bottom: var(--spacing-xs); }
.py-sm { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-md { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }
.py-xl { padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }
.py-2xl { padding-top: var(--spacing-2xl); padding-bottom: var(--spacing-2xl); }
.py-3xl { padding-top: var(--spacing-3xl); padding-bottom: var(--spacing-3xl); }
.py-4xl { padding-top: var(--spacing-4xl); padding-bottom: var(--spacing-4xl); }

/* 外边距工具类 */
.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-0 { margin-top: 0; margin-bottom: 0; }
.my-xs { margin-top: var(--spacing-xs); margin-bottom: var(--spacing-xs); }
.my-sm { margin-top: var(--spacing-sm); margin-bottom: var(--spacing-sm); }
.my-md { margin-top: var(--spacing-md); margin-bottom: var(--spacing-md); }
.my-lg { margin-top: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
.my-xl { margin-top: var(--spacing-xl); margin-bottom: var(--spacing-xl); }

/* 文字工具类 */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }
.text-4xl { font-size: var(--font-size-4xl); }
.text-5xl { font-size: var(--font-size-5xl); }

.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-justify { text-align: justify; }

.font-light { font-weight: var(--font-weight-light); }
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }
.font-extrabold { font-weight: var(--font-weight-extrabold); }

/* 显示工具类 */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }

/* 响应式显示 */
@media (min-width: 640px) {
    .sm\:block { display: block; }
    .sm\:inline-block { display: inline-block; }
    .sm\:hidden { display: none; }
}

@media (min-width: 768px) {
    .md\:block { display: block; }
    .md\:inline-block { display: inline-block; }
    .md\:hidden { display: none; }
}

@media (min-width: 1024px) {
    .lg\:block { display: block; }
    .lg\:inline-block { display: inline-block; }
    .lg\:hidden { display: none; }
}

/* 边框圆角工具类 */
.rounded-none { border-radius: 0; }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* 阴影工具类 */
.shadow-none { box-shadow: none; }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-2xl { box-shadow: var(--shadow-2xl); }

/* ========================================
   管理后台功能介绍 - 标签页样式
   ======================================== */

/* 管理后台区域 */
.admin-showcase {
    background: var(--bg-secondary);
    padding: var(--spacing-4xl) 0;
    position: relative;
    overflow: hidden;
}

/* 装饰性背景 */
.admin-showcase::before {
    content: '';
    position: absolute;
    top: -200px;
    left: -200px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--primary-lightest) 0%, transparent 70%);
    opacity: 0.2;
    pointer-events: none;
}

/* 标签页导航容器 */
.admin-tabs-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
}

/* 隐藏滚动条但保持功能 */
.admin-tabs-nav::-webkit-scrollbar {
    height: 0;
}

/* 标签按钮 */
.admin-tab {
    flex: 0 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* 标签按钮图标 */
.admin-tab i {
    font-size: var(--font-size-lg);
    transition: transform 0.3s ease;
}

/* 标签悬停效果 */
.admin-tab:hover {
    color: var(--primary-color);
    background: rgba(33, 150, 243, 0.05);
    transform: translateY(-2px);
}

.admin-tab:hover i {
    transform: scale(1.1);
}

/* 活跃标签样式 */
.admin-tab.active {
    color: var(--text-white);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
}

.admin-tab.active i {
    transform: scale(1.1);
}

/* 标签下划线动画 */
.admin-tab::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.admin-tab:not(.active):hover::after {
    width: 100%;
}

/* 内容面板容器 */
.admin-tabs-content {
    position: relative;
    min-height: 500px;
}

/* 单个内容面板 */
.admin-panel {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

/* 活跃面板 */
.admin-panel.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
    animation: fadeInUp 0.5s ease;
}

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

/* 管理模块卡片容器 */
.admin-module-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

/* 模块卡片悬停效果 */
.admin-module-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* 模块头部 */
.module-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* 模块图标容器 */
.module-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

/* 图标光晕效果 */
.module-icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.admin-module-card:hover .module-icon::after {
    opacity: 1;
}

/* 模块图标 */
.module-icon i {
    font-size: var(--font-size-2xl);
    color: var(--text-white);
    z-index: 1;
}

/* 模块信息 */
.module-info {
    flex: 1;
}

.module-info h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.module-info p {
    color: var(--text-body);
    line-height: var(--line-height-relaxed);
    font-size: var(--font-size-base);
}

/* 功能列表 */
.module-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: var(--spacing-md);
}

.module-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.module-features li:hover {
    background: var(--bg-secondary);
    transform: translateX(5px);
}

/* 功能列表图标 */
.module-features li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--secondary-color);
    font-size: var(--font-size-sm);
    width: 20px;
    height: 20px;
    background: rgba(76, 175, 80, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* 各模块的独特配色方案 */
/* 仪表盘 */
.module-dashboard .module-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* 商品管理 */
.module-products .module-icon {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

/* 订单管理 */
.module-orders .module-icon {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* 客户管理 */
.module-customers .module-icon {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

/* 营销工具 */
.module-marketing .module-icon {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

/* 支付设置 */
.module-payment .module-icon {
    background: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
}

/* 数据分析 */
.module-analytics .module-icon {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

/* 系统设置 */
.module-settings .module-icon {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
}

/* 权限管理 */
.module-permissions .module-icon {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
}

/* 扩展插件 */
.module-plugins .module-icon {
    background: linear-gradient(135deg, #a1c4fd 0%, #c2e9fb 100%);
}

/* 平板端响应式 (768px - 1024px) */
@media (max-width: 1024px) and (min-width: 768px) {
    .admin-tabs-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-sm);
        padding: var(--spacing-lg);
    }

    .admin-tab {
        flex: 0 0 calc(50% - var(--spacing-sm));
        justify-content: center;
    }
}

/* 移动端响应式 (< 768px) */
@media (max-width: 768px) {
    /* 标签导航转为垂直手风琴 */
    .admin-tabs-nav {
        flex-direction: column;
        gap: var(--spacing-xs);
        padding: var(--spacing-md);
        background: transparent;
        box-shadow: none;
    }

    .admin-tab {
        width: 100%;
        justify-content: space-between;
        padding: var(--spacing-lg) var(--spacing-md);
        background: var(--bg-primary);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
    }

    .admin-tab::after {
        display: none;
    }

    /* 移动端添加箭头指示器 */
    .admin-tab::before {
        content: '\f107';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        position: absolute;
        right: var(--spacing-md);
        transition: transform 0.3s ease;
        color: var(--text-light);
    }

    .admin-tab.active::before {
        transform: rotate(180deg);
        color: var(--text-white);
    }

    /* 移动端内容面板样式 */
    .admin-panel {
        margin-top: var(--spacing-sm);
        padding: var(--spacing-md);
        background: var(--bg-primary);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
    }

    /* 模块头部移动端布局 */
    .module-header {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .module-icon {
        width: 80px;
        height: 80px;
    }

    .module-info {
        text-align: center;
    }

    /* 功能列表移动端优化 */
    .module-features {
        gap: var(--spacing-sm);
    }

    .module-features li {
        font-size: var(--font-size-sm);
        padding: var(--spacing-sm);
    }
}

/* 加载状态 */
.admin-panel.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.admin-panel.loading::after {
    content: '';
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-light);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* 过渡动画 */
.admin-panel-enter {
    opacity: 0;
    transform: translateX(20px);
}

.admin-panel-enter-active {
    opacity: 1;
    transform: translateX(0);
    transition: all 0.3s ease;
}

.admin-panel-exit {
    opacity: 1;
    transform: translateX(0);
}

.admin-panel-exit-active {
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.3s ease;
}

/* 管理模块网格布局 */
.admin-modules-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

@media (max-width: 1024px) {
    .admin-modules-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* 功能亮点标签 */
.module-highlight {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--accent-color);
    color: var(--text-white);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: var(--spacing-md);
}

.module-highlight i {
    font-size: var(--font-size-xs);
}

/* 模块操作按钮 */
.module-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.module-action-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.module-action-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.module-action-btn.primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-white);
}

.module-action-btn.primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    box-shadow: var(--shadow-md);
}

/* 模块统计数据 */
.module-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

.module-stat {
    text-align: center;
    flex: 1;
}

.module-stat-value {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.module-stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

/* 功能标记 */
.feature-badge {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--secondary-color);
    border-radius: 50%;
    margin-right: var(--spacing-sm);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.4);
    }
    70% {
        box-shadow: 0 0 0 6px rgba(76, 175, 80, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(76, 175, 80, 0);
    }
}

/* 渐进式显示效果 */
.admin-module-card {
    opacity: 0;
    animation: moduleSlideIn 0.6s ease forwards;
}

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

.admin-module-card:nth-child(1) { animation-delay: 0.1s; }
.admin-module-card:nth-child(2) { animation-delay: 0.2s; }
.admin-module-card:nth-child(3) { animation-delay: 0.3s; }
.admin-module-card:nth-child(4) { animation-delay: 0.4s; }

/* 标签页切换器指示器 */
.tab-indicator {
    position: absolute;
    bottom: 0;
    height: 3px;
    background: var(--primary-color);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 3px 3px 0 0;
}

/* 移动端滑动提示 */
@media (max-width: 768px) {
    .admin-tabs-nav::after {
        content: '滑动查看更多 →';
        position: absolute;
        right: var(--spacing-md);
        top: 50%;
        transform: translateY(-50%);
        font-size: var(--font-size-xs);
        color: var(--text-muted);
        opacity: 0.6;
        pointer-events: none;
    }

    .admin-tabs-nav.scrolled::after {
        display: none;
    }
}

/* 功能预览图 */
.module-preview {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.module-preview img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.module-preview-placeholder {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.module-preview-placeholder i {
    font-size: var(--font-size-3xl);
    opacity: 0.3;
}

/* ========================================
   图片懒加载样式
   ======================================== */

/* 懒加载占位符 */
.lazy-loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    position: relative;
    overflow: hidden;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* 加载中的图片模糊效果 */
img.lazy-loading {
    filter: blur(5px);
    transition: filter 0.3s ease;
}

/* 加载完成的图片 */
img.lazy-loaded {
    filter: blur(0);
    animation: fadeIn 0.3s ease;
}

/* 加载错误的图片 */
img.lazy-error {
    opacity: 0.5;
    filter: grayscale(100%);
}

/* 图片渐入动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 防止布局偏移 */
img[width][height] {
    aspect-ratio: attr(width) / attr(height);
}

/* ========================================
   性能优化相关样式
   ======================================== */

/* 减少重绘的优化 */
.will-change-transform {
    will-change: transform;
}

/* GPU 加速提示 */
.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* 优化动画性能 */
.smooth-animation {
    transform: translate3d(0, 0, 0);
}

/* 字体优化 */
body {
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 减少动画在移动设备上的性能影响 */
@media (max-width: 768px) {
    * {
        animation-duration: 0.1s !important;
        animation-delay: 0.1s !important;
        transition-duration: 0.1s !important;
    }

    /* 保留关键动画 */
    .btn,
    .nav-toggle,
    .back-to-top {
        animation-duration: 0.3s !important;
        transition-duration: 0.3s !important;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0066cc;
        --text-primary: #000000;
        --text-body: #000000;
        --bg-primary: #ffffff;
        --bg-secondary: #f0f0f0;
    }
}

/* 暗色模式准备（可选） */
@media (prefers-color-scheme: dark) {
    /* 暗色模式变量可以在这里定义 */
}

/* 打印样式优化 */
@media print {
    .navbar,
    .back-to-top,
    .hero-bg,
    .visual-guide,
    .urgent-contact,
    [data-aos] {
        display: none !important;
    }

    body {
        color: #000;
        background: #fff;
    }

    a {
        text-decoration: underline;
    }
}

/* ========================================
   移动端额外优化
   ======================================== */

/* 移动端滚动优化 */
.nav-menu,
.admin-tabs-nav,
.showcase-tabs,
.feature-workflow {
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
}

/* 防止双击缩放 */
* {
    touch-action: manipulation;
}

/* 导航菜单项移动端优化 */
@media (max-width: 768px) {
    .nav-menu a {
        padding: var(--spacing-md) var(--spacing-lg);
        min-height: 44px;
        display: flex;
        align-items: center;
    }
}

/* 触摸设备hover优化 */
@media (hover: hover) {
    /* 仅在支持hover的设备上应用hover效果 */
    .btn:hover,
    .feature-card:hover,
    .tech-item:hover {
        /* 保留原有hover效果 */
    }
}

@media (hover: none) {
    /* 触摸设备上移除hover效果 */
    .btn:hover {
        transform: none;
        box-shadow: none;
    }
}

/* 小图标按钮增大点击区域 */
.copy-btn,
.close-btn,
.nav-toggle {
    position: relative;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-btn::before,
.close-btn::before,
.nav-toggle::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
}

/* iOS安全区域适配 */
@supports (padding: max(0px)) {
    .navbar,
    .footer {
        padding-left: max(var(--spacing-md), env(safe-area-inset-left));
        padding-right: max(var(--spacing-md), env(safe-area-inset-right));
    }

    .footer {
        padding-bottom: max(var(--spacing-md), env(safe-area-inset-bottom));
    }
}

/* 横向滚动容器 */
.horizontal-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
}

.horizontal-scroll > * {
    scroll-snap-align: start;
}

/* 移动端字体大小优化 */
@media (max-width: 480px) {
    :root {
        --font-size-base: 15px;
        --font-size-sm: 13px;
    }
}

/* 移动端性能优化类 */
.mobile-optimized {
    transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-font-smoothing: subpixel-antialiased;
}

/* 禁用移动端的复杂动画 */
@media (max-width: 768px) and (prefers-reduced-motion: no-preference) {
    .hero-bg,
    .parallax,
    .feature-card::before,
    .tech-item::after {
        animation: none !important;
        transform: none !important;
    }
}

/* 移动端表单优化 */
@media (max-width: 768px) {
    .contact-form {
        padding: var(--spacing-xl);
    }

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

    /* 提交按钮全宽 */
    .contact-form .btn-primary {
        width: 100%;
        justify-content: center;
    }
}

/* ====================== */
/* Admin Section Enhanced */
/* ====================== */

#admin {
    padding: var(--section-padding) 0;
    background: var(--bg-light);
}

.admin-tabs {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 0;
    box-shadow: var(--shadow-lg);
    display: flex;
    gap: 0;
    min-height: 700px;
    overflow: hidden;
}

.admin-tabs-nav {
    flex: 0 0 240px;
    background: white;
    border-right: 1px solid var(--border-light);
    padding: var(--spacing-xs) 0;
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.admin-tab {
    padding: 0.5rem var(--spacing-lg);
    margin: 0 var(--spacing-xs);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-align: left;
    position: relative;
    white-space: nowrap;
}

.admin-tab i {
    font-size: 1.1rem;
    width: 20px;
    flex-shrink: 0;
    text-align: center;
}

.admin-tab span {
    flex: 1;
}

.admin-tab:hover {
    background: var(--bg-light);
    color: var(--primary-color);
    transform: translateX(2px);
}

.admin-tab.active {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 2px 8px rgba(33, 150, 243, 0.3);
}

.admin-tab.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: white;
    border-radius: 0 2px 2px 0;
}

.admin-panels {
    flex: 1;
    background: var(--bg-light);
    overflow-y: auto;
    position: relative;
}

.admin-panel {
    display: none;
    padding: var(--spacing-xl);
    animation: fadeIn 0.5s ease;
    min-height: 100%;
}

.admin-panel.active {
    display: block;
}

/* New Admin Panel Styles */
.panel-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.panel-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.panel-icon i {
    font-size: 2rem;
    color: white;
}

.panel-title h3 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.panel-title p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.4;
}

.panel-content {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    min-height: 500px;
}

.panel-image {
    width: 100%;
    max-width: 100%;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    position: relative;
    padding: 1rem;
}

.panel-image img {
    max-width: 100%;
    height: auto;
    width: auto;
    display: block;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.panel-image::before {
    content: '界面预览';
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(33, 150, 243, 0.1);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
}

.panel-details h4 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.panel-details > p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.panel-details .feature-grid {
    display: grid;
    gap: 1rem;
}

.panel-details .feature-item {
    display: flex;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: var(--radius);
    transition: all 0.3s ease;
}

.panel-details .feature-item:hover {
    background: white;
    box-shadow: var(--shadow);
    transform: translateX(3px);
}

.panel-details .feature-item i {
    font-size: 1.25rem;
    color: var(--primary-color);
    width: 32px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.panel-details .feature-item h5 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.panel-details .feature-item p {
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-secondary);
    margin: 0;
}

/* Hide old panel features */
.admin-panel .panel-features {
    display: none;
}

/* Responsive Admin Panels */
@media (max-width: 1024px) {
    .panel-content {
        grid-template-columns: 1fr;
    }

    .panel-image {
        min-height: 300px;
    }
}

@media (max-width: 768px) {
    .admin-tabs {
        padding: 1rem;
    }

    .admin-tabs-nav {
        gap: 0.25rem;
        margin-bottom: 2rem;
    }

    .admin-tab {
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }

    .admin-tab i {
        display: none;
    }

    .panel-header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .panel-icon {
        width: 60px;
        height: 60px;
    }

    .panel-icon i {
        font-size: 2rem;
    }

    .panel-title h3 {
        font-size: 1.5rem;
    }

    .panel-title p {
        font-size: 1rem;
    }

    .panel-details h4 {
        font-size: 1.25rem;
    }

    .panel-details .feature-item {
        padding: 1rem;
    }

    .panel-details .feature-item i {
        font-size: 1.25rem;
        width: 30px;
    }

    .panel-details .feature-item h5 {
        font-size: 1rem;
    }

    .panel-details .feature-item p {
        font-size: 0.875rem;
    }
}

/* Enhanced Admin Panel Responsive Layout */
@media (max-width: 1200px) {
    .admin-tabs-nav {
        flex: 0 0 200px;
    }

    .admin-tab {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }

    .admin-tab i {
        font-size: 1rem;
        width: 20px;
    }
}

@media (max-width: 1024px) {
    .admin-tabs {
        flex-direction: column;
        min-height: auto;
    }

    .admin-tabs-nav {
        flex: none;
        width: 100%;
        flex-direction: row;
        border-right: none;
        border-bottom: 1px solid var(--border-light);
        padding: var(--spacing-md);
        overflow-x: auto;
        overflow-y: hidden;
        gap: var(--spacing-sm);
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .admin-tabs-nav::-webkit-scrollbar {
        display: none;
    }

    .admin-tab {
        flex: 0 0 auto;
        margin: 0;
        padding: var(--spacing-sm) var(--spacing-lg);
        white-space: nowrap;
    }

    .admin-tab.active::before {
        top: auto;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 70%;
        height: 3px;
        border-radius: 2px 2px 0 0;
    }

    .admin-panels {
        min-height: 600px;
    }
}

@media (max-width: 768px) {
    .admin-tabs {
        padding: 0;
        box-shadow: none;
        background: transparent;
    }

    .admin-tabs-nav {
        background: white;
        margin-bottom: var(--spacing-md);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-sm);
        padding: var(--spacing-sm);
        gap: var(--spacing-xs);
    }

    .admin-tab {
        font-size: var(--font-size-sm);
        padding: var(--spacing-sm) var(--spacing-md);
        gap: var(--spacing-sm);
        border-radius: var(--radius-sm);
    }

    .admin-tab i {
        font-size: 1rem;
        width: 20px;
    }

    .admin-tab span {
        display: inline;
    }

    .admin-tab:hover {
        transform: none;
    }

    .admin-panel {
        padding: var(--spacing-md);
    }

    .panel-header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
        padding: var(--spacing-lg);
    }

    .panel-content {
        padding: var(--spacing-lg);
        min-height: 400px;
    }
}