/* 全局重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4F46E5;
    --primary-hover: #4338CA;
    --secondary-color: #6366F1;
    --accent-color: #8B5CF6;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-accent: #F3F4F6;
    --border-color: #E5E7EB;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-hero: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #EC4899 100%);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    /* 禁止缩放 */
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    touch-action: manipulation;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 图片保护 */
img {
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    user-drag: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    pointer-events: none;
}

/* 允许某些交互元素的图片有pointer事件 */
.nav-logo img,
.footer-logo img {
    pointer-events: auto;
}

/* 允许交互元素的文字选择和pointer事件 */
button,
.btn-primary,
.btn-secondary,
a,
input,
textarea,
.lang-btn,
.lang-dropdown a,
.nav-menu a {
    pointer-events: auto;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* 允许输入框的文字选择 */
input,
textarea {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

/* 工具类 */
.hidden {
    display: none !important;
}

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

.btn-primary {
    background: linear-gradient(135deg, #FF6B6B 0%, #FF8E53 50%, #FF6B9D 100%);
    color: white;
    padding: 14px 36px;
    border: none;
    border-radius: 16px;
    font-weight: 700;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
    text-decoration: none;
    display: inline-block;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s;
}

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

.btn-primary:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 12px 35px rgba(255, 107, 107, 0.6);
    background: linear-gradient(135deg, #FF5252 0%, #FF7043 50%, #FF4081 100%);
}

.btn-primary:active {
    transform: translateY(-1px) scale(1.02);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    padding: 12px 32px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    color: white;
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 应用内蒙层 */
.app-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(10px);
    /* 阻止穿透 */
    pointer-events: auto;
    overscroll-behavior: contain;
    touch-action: none;
}

.overlay-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    max-width: 400px;
    max-height: 90vh;
    margin: 20px;
    box-shadow: var(--shadow-xl);
    animation: overlaySlideIn 0.3s ease-out;
    /* 允许内容滚动 */
    overflow-y: auto;
    pointer-events: auto;
    /* 确保弹窗内容可以交互 */
    touch-action: auto;
}

@keyframes overlaySlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.overlay-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 32px;
    color: white;
}

.overlay-content h3 {
    font-size: 24px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.overlay-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.overlay-steps {
    margin: 24px 0;
}

.step {
    display: flex;
    align-items: center;
    margin: 12px 0;
    text-align: left;
}

.step span:first-child {
    width: 32px;
    height: 32px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-right: 16px;
    flex-shrink: 0;
}



/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(249, 250, 251, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-color);
}

.navbar.scrolled {
    background: rgba(249, 250, 251, 0.98) !important;
    backdrop-filter: blur(15px) !important;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-logo img {
    width: 40px;
    height: 40px;
    margin-right: 12px;
    border-radius: 8px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 50%;
    background: var(--primary-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-menu a:hover::after {
    width: 100%;
}

/* 语言选择器 */
.language-selector {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    color: var(--text-primary);
}

.lang-btn:hover {
    background: var(--bg-accent);
    border-color: var(--primary-color);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    min-width: 150px;
    margin-top: 8px;
    overflow: hidden;
    z-index: 1001;
}

.lang-dropdown a {
    display: block;
    padding: 12px 16px;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 14px;
    background: white;
}

.lang-dropdown a:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

/* 主要内容区域 */
main {
    margin-top: 70px;
}

/* 英雄区域 */
.hero {
    background: var(--gradient-hero);
    color: white;
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%" r="50%"><stop offset="0%" style="stop-color:rgba(255,255,255,0.1)"/><stop offset="100%" style="stop-color:rgba(255,255,255,0)"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"/><circle cx="800" cy="300" r="150" fill="url(%23a)"/><circle cx="300" cy="700" r="120" fill="url(%23a)"/><circle cx="700" cy="800" r="80" fill="url(%23a)"/></svg>') no-repeat center center;
    background-size: cover;
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    transform: perspective(1000px) rotateY(-15deg) rotateX(5deg);
    transition: transform 0.3s ease;
}

.hero-image:hover img {
    transform: perspective(1000px) rotateY(-10deg) rotateX(2deg);
}

/* 功能特性 */
.features {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

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

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 32px;
    color: white;
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    background: var(--gradient-accent);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

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

/* 安全性部分 */
.security {
    padding: 100px 0;
    background: white;
}

.security-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.security-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.security-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.6;
}

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

.security-list li {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
    font-size: 1.125rem;
    color: var(--text-primary);
}

.security-list li::before {
    content: '✓';
    width: 24px;
    height: 24px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 16px;
    font-weight: bold;
    flex-shrink: 0;
}

.security-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

/* 下载区域 */
.download {
    padding: 100px 0;
    background: var(--bg-secondary);
    text-align: center;
}

.download h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.download p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 60px;
}

/* 移动端下载 */
.download-mobile {
    max-width: 600px;
    margin: 0 auto;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.download-btn img {
    height: 60px;
    transition: transform 0.3s ease;
    border-radius: 12px;
}

.download-btn:hover img {
    transform: scale(1.05);
}

.direct-download h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.direct-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-download {
    background: linear-gradient(135deg, #FF6B6B 0%, #FF8E53 50%, #FF6B9D 100%);
    color: white;
    padding: 18px 36px;
    border-radius: 16px;
    text-decoration: none;
    font-weight: 700;
    font-size: 17px;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
    display: inline-block;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-download::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s;
}

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

.btn-download:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 12px 35px rgba(255, 107, 107, 0.6);
    background: linear-gradient(135deg, #FF5252 0%, #FF7043 50%, #FF4081 100%);
}

.btn-download:active {
    transform: translateY(-1px) scale(1.02);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.5);
}

/* PC端二维码 */
.download-pc {
    max-width: 500px;
    margin: 0 auto;
}

.qr-container {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.qr-code {
    margin-bottom: 24px;
}

.qr-code canvas {
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
}

.qr-code canvas:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-xl);
}

.qr-text h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.qr-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.current-url {
    background: var(--bg-secondary);
    padding: 12px 16px;
    border-radius: 8px;
    font-family: monospace;
    font-size: 14px;
    color: var(--text-secondary);
    word-break: break-all;
    border: 1px solid var(--border-color);
}

/* 截图展示 */
.screenshots {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.screenshots h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.screenshot {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
}

.screenshot:hover {
    transform: translateY(-10px) scale(1.02);
}

.screenshot img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    display: block;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #1f2937 0%, #374151 100%);
    color: white;
    padding: 60px 0 20px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-logo img {
    width: 40px;
    height: 40px;
    margin-right: 12px;
    border-radius: 8px;
}

.footer-section p {
    color: var(--text-light);
    line-height: 1.6;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section ul li a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 20px;
    text-align: center;
    color: var(--text-light);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 3rem;
    }
    
    .security-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 16px;
    }
    
    .nav-menu {
        gap: 20px;
        justify-content: flex-end;
    }
    
    .nav-menu a:not(.lang-dropdown a) {
        display: none;
    }
    
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.125rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .features,
    .security,
    .download,
    .screenshots {
        padding: 60px 0;
    }
    
    .features h2,
    .security h2,
    .download h2,
    .screenshots h2 {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 30px;
    }
    
    .overlay-content {
        padding: 30px;
        margin: 16px;
    }
    
    .overlay-content h3 {
        font-size: 20px;
    }
    
    .footer {
        padding: 40px 0 20px;
    }
    
    .footer-content {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
        text-align: left;
    }
    
    .footer-section:first-child {
        grid-column: 1 / -1; /* logo区域跨越所有列 */
        text-align: center;
        margin-bottom: 20px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        height: 60px;
    }
    
    .nav-logo {
        font-size: 20px;
    }
    
    .nav-logo img {
        width: 32px;
        height: 32px;
    }
    
    .nav-menu {
        gap: 16px;
        justify-content: flex-end;
    }
    
    .nav-menu a:not(.lang-dropdown a) {
        display: none;
    }
    
    .lang-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .language-selector {
        position: relative;
    }
    
    .footer-content {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 15px;
        text-align: left;
    }
    
    .footer-section:first-child {
        grid-column: 1 / -1; /* logo区域跨越所有列 */
        text-align: center;
        margin-bottom: 15px;
    }
    
    .footer-section h4 {
        font-size: 0.9rem;
        margin-bottom: 8px;
    }
    
    .footer-section ul li a {
        font-size: 13px;
    }
    
    main {
        margin-top: 60px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .btn-primary,
    .btn-secondary {
        padding: 12px 28px;
        font-size: 16px;
    }
    
    .btn-download {
        padding: 16px 32px;
        font-size: 16px;
    }
    
    .feature-card {
        padding: 24px;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }
    
    .screenshots-grid {
        grid-template-columns: 1fr;
    }
    
    .screenshot img {
        height: 400px;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .direct-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .qr-container {
        padding: 24px;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* 滚动动画 */
.animate-on-scroll {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

/* 渐变文字效果 */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #F9FAFB;
        --text-secondary: #D1D5DB;
        --text-light: #9CA3AF;
        --bg-primary: #111827;
        --bg-secondary: #1F2937;
        --bg-accent: #374151;
        --border-color: #4B5563;
    }
    
    .navbar {
        background: rgba(17, 24, 39, 0.95);
        border-bottom-color: var(--border-color);
    }
    
    .navbar.scrolled {
        background: rgba(17, 24, 39, 0.98) !important;
        backdrop-filter: blur(15px) !important;
    }
    
    .footer {
        background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    }
    
    .overlay-content {
        background: var(--bg-primary);
        color: var(--text-primary);
    }
    
    .feature-card {
        background: var(--bg-primary);
        border-color: var(--border-color);
    }
    
    .security {
        background: var(--bg-primary);
    }
    
    .qr-container {
        background: var(--bg-primary);
        border-color: var(--border-color);
    }
    
    .current-url {
        background: var(--bg-secondary);
        border-color: var(--border-color);
    }
    
    .lang-dropdown {
        background: var(--bg-primary);
        border-color: var(--border-color);
    }
    
    .lang-dropdown a {
        background: var(--bg-primary);
        color: var(--text-primary);
    }
    
    .lang-dropdown a:hover {
        background: var(--bg-secondary);
        color: var(--primary-color);
    }
    
    .screenshots {
        background: var(--bg-secondary);
    }
    
    .btn-secondary {
        background: rgba(255, 255, 255, 0.1);
        color: white;
        border-color: rgba(255, 255, 255, 0.2);
    }
    
    .btn-secondary:hover {
        background: rgba(255, 255, 255, 0.2);
        border-color: rgba(255, 255, 255, 0.4);
    }
}