/* 全新大胆设计风格 - 霓虹科技感 */
:root {
    /* 品牌色彩 - 霓虹渐变 */
    --primary-color: #00f5d4;
    --primary-dark: #00d4b8;
    --primary-light: #38ffd9;
    --accent-color: #9d4edd;
    --accent-secondary: #ff006e;
    --success-color: #06d6a0;
    --warning-color: #ffd166;
    --danger-color: #ef476f;

    /* 渐变背景 */
    --gradient-primary: linear-gradient(135deg, #00f5d4 0%, #00bbf9 100%);
    --gradient-secondary: linear-gradient(135deg, #9d4edd 0%, #f72585 100%);
    --gradient-accent: linear-gradient(135deg, #ff006e 0%, #ffbe0b 100%);
    --gradient-dark: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 100%);
    --gradient-mesh: 
        radial-gradient(at 0% 0%, rgba(0, 245, 212, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(157, 78, 221, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(255, 0, 110, 0.15) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(0, 187, 249, 0.15) 0px, transparent 50%);

    /* 中性色彩 */
    --light-color: #ffffff;
    --dark-color: #000000;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e0e0e0;
    --gray-300: #bdbdbd;
    --gray-400: #9e9e9e;
    --gray-500: #757575;
    --gray-600: #616161;
    --gray-700: #424242;
    --gray-800: #212121;
    --gray-900: #121212;

    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 22px;
    --font-size-2xl: 28px;
    --font-size-3xl: 36px;
    --font-size-4xl: 48px;
    --font-size-5xl: 64px;
    --font-size-6xl: 80px;

    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.5rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    --spacing-4xl: 8rem;

    /* 边框 */
    --border-radius: 16px;
    --border-radius-lg: 24px;
    --border-radius-xl: 32px;
    --border-radius-2xl: 48px;
    --border-radius-full: 9999px;

    /* 阴影 - 霓虹效果 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
    --shadow-neon: 0 0 20px rgba(0, 245, 212, 0.4), 0 0 40px rgba(0, 245, 212, 0.2);
    --shadow-neon-pink: 0 0 20px rgba(157, 78, 221, 0.4), 0 0 40px rgba(157, 78, 221, 0.2);

    /* 容器宽度 */
    --container-max-width: 1400px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.8;
    color: var(--gray-700);
    background-color: var(--light-color);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* 排版 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--font-size-6xl);
}

h2 {
    font-size: var(--font-size-5xl);
}

h3 {
    font-size: var(--font-size-4xl);
}

h4 {
    font-size: var(--font-size-3xl);
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    font-weight: 700;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    font-size: var(--font-size-base);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    transition: all 0.4s ease;
    transform: translate(-50%, -50%);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--gray-900);
    box-shadow: var(--shadow-neon);
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 0 40px rgba(0, 245, 212, 0.6), 0 0 80px rgba(0, 245, 212, 0.3);
}

.btn-secondary {
    background: rgba(0, 245, 212, 0.1);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--gray-900);
    transform: translateY(-4px) scale(1.02);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: white;
    color: var(--gray-900);
    transform: translateY(-4px) scale(1.02);
}

.btn-accent {
    background: var(--gradient-secondary);
    color: white;
    box-shadow: var(--shadow-neon-pink);
}

.btn-accent:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 0 40px rgba(157, 78, 221, 0.6), 0 0 80px rgba(157, 78, 221, 0.3);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.9);
    box-shadow: var(--shadow-lg);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 900;
    font-size: var(--font-size-xl);
    color: white;
    transition: all 0.3s ease;
    text-shadow: 0 0 20px rgba(0, 245, 212, 0.5);
}

.logo:hover {
    transform: scale(1.05);
    text-shadow: 0 0 40px rgba(0, 245, 212, 0.8);
}

.logo-icon {
    background: var(--gradient-primary);
    color: var(--gray-900);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    margin-right: var(--spacing-sm);
    font-weight: 900;
    box-shadow: var(--shadow-neon);
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    transition: all 0.3s ease;
    transform: translateX(-50%);
    box-shadow: var(--shadow-neon);
}

.nav-links a:hover {
    color: white;
    text-shadow: 0 0 20px rgba(0, 245, 212, 0.5);
}

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

.menu-toggle {
    display: none;
    background: rgba(0, 245, 212, 0.2);
    border: 2px solid var(--primary-color);
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    cursor: pointer;
    padding: var(--spacing-sm);
    transition: all 0.3s ease;
    border-radius: var(--border-radius);
}

.menu-toggle:hover {
    background: var(--primary-color);
    color: var(--gray-900);
    box-shadow: var(--shadow-neon);
}

/* 英雄区域 */
.hero {
    padding: 200px 0 var(--spacing-4xl);
    background: var(--gradient-dark);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-mesh);
    animation: meshMove 20s ease-in-out infinite;
}

@keyframes meshMove {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.2) rotate(5deg); }
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-title {
    color: white;
    font-weight: 900;
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-6xl);
    letter-spacing: -0.03em;
    text-shadow: 0 4px 40px rgba(0, 0, 0, 0.5);
    line-height: 1.1;
    background: linear-gradient(135deg, #ffffff 0%, #00f5d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-2xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 2;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    font-weight: 500;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    margin-bottom: var(--spacing-3xl);
    flex-wrap: wrap;
}

/* 功能区域 */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.section-title {
    margin-bottom: var(--spacing-lg);
    font-weight: 900;
    color: var(--gray-900);
    position: relative;
    display: inline-block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 5px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-full);
    box-shadow: var(--shadow-neon);
}

.section-subtitle {
    color: var(--gray-600);
    font-size: var(--font-size-lg);
    max-width: 700px;
    margin: var(--spacing-xl) auto 0;
    font-weight: 500;
}

.features {
    padding: var(--spacing-4xl) 0;
    background: var(--gray-50);
}

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

.feature-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-neon);
    border-color: rgba(0, 245, 212, 0.3);
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-neon);
    transition: all 0.4s ease;
}

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

.feature-title {
    margin-bottom: var(--spacing-md);
    font-weight: 800;
    color: var(--gray-900);
    font-size: var(--font-size-xl);
}

.feature-description {
    color: var(--gray-600);
    line-height: 1.8;
    font-weight: 500;
}

/* 核心组件 */
.components {
    padding: var(--spacing-4xl) 0;
    background: white;
}

.components-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.component-card {
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid var(--gray-100);
}

.component-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-neon);
    border-color: rgba(0, 245, 212, 0.3);
}

.component-icon {
    width: 90px;
    height: 90px;
    background: var(--gradient-secondary);
    border-radius: var(--border-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    margin: 0 auto var(--spacing-xl);
    box-shadow: var(--shadow-neon-pink);
    transition: all 0.4s ease;
}

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

.component-title {
    margin-bottom: var(--spacing-md);
    font-weight: 800;
    color: var(--gray-900);
    font-size: var(--font-size-xl);
}

.component-description {
    color: var(--gray-600);
    line-height: 1.8;
    font-weight: 500;
}

/* 多平台支持 */
.platforms {
    padding: var(--spacing-4xl) 0;
    background: var(--gradient-dark);
    color: white;
    position: relative;
    overflow: hidden;
}

.platforms::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-mesh);
    opacity: 0.5;
}

.platforms .container {
    position: relative;
    z-index: 1;
}

.platforms .section-title {
    background: linear-gradient(135deg, #ffffff 0%, #00f5d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.platforms .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-xl);
}

.platform-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.platform-card:hover {
    transform: translateY(-12px) scale(1.05);
    box-shadow: 0 0 40px rgba(0, 245, 212, 0.3), var(--shadow-xl);
    border-color: rgba(0, 245, 212, 0.5);
    background: rgba(255, 255, 255, 0.1);
}

.platform-icon {
    font-size: 4rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-lg);
    filter: drop-shadow(0 0 20px rgba(0, 245, 212, 0.5));
    transition: all 0.4s ease;
}

.platform-card:hover .platform-icon {
    transform: scale(1.2) rotate(10deg);
}

.platform-title {
    margin-bottom: var(--spacing-sm);
    font-weight: 800;
    color: white;
    font-size: var(--font-size-xl);
}

.platform-description {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* 下载区域 */
.download {
    padding: var(--spacing-4xl) 0;
    background: var(--gradient-primary);
    color: var(--gray-900);
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(255,255,255,0.2) 0%, transparent 70%);
}

.download-content {
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.download-title {
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
    font-weight: 900;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    font-size: var(--font-size-5xl);
}

.download-subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2xl);
    color: var(--gray-800);
    font-weight: 600;
}

.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.download-option {
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(12px);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--gray-900);
    border: 2px solid rgba(0, 0, 0, 0.2);
    cursor: pointer;
}

.download-option:hover {
    background: rgba(0, 0, 0, 0.3);
    transform: translateY(-8px) scale(1.05);
    box-shadow: var(--shadow-lg);
    border-color: rgba(0, 0, 0, 0.4);
}

.os-icon {
    font-size: 2.5rem;
    color: var(--gray-900);
}

.os-name {
    display: block;
    font-weight: 800;
    font-size: var(--font-size-lg);
}

.os-size {
    display: block;
    font-size: var(--font-size-sm);
    opacity: 0.8;
    font-weight: 600;
}

.download-note {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.download-note p {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 0;
    color: var(--gray-900);
    font-size: var(--font-size-base);
    font-weight: 600;
}

/* 页脚 */
.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    background: var(--gray-900);
    color: var(--gray-400);
    border-top: 2px solid rgba(0, 245, 212, 0.2);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
    gap: var(--spacing-xl);
}

.footer-brand {
    flex: 1;
    min-width: 350px;
}

.footer-brand .logo {
    margin-bottom: var(--spacing-lg);
}

.footer-description {
    line-height: 1.9;
    font-weight: 500;
}

.footer-links {
    flex: 2;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
}

.footer-column h4 {
    color: white;
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.footer-column li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: var(--gray-400);
    font-weight: 500;
}

.footer-column a:hover {
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(0, 245, 212, 0.5);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.copyright {
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.copyright a {
    color: var(--gray-400);
    margin: 0 var(--spacing-sm);
}

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

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-title {
        font-size: var(--font-size-5xl);
    }

    .hero-description {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-6xl: 48px;
        --font-size-5xl: 36px;
        --font-size-4xl: 28px;
        --font-size-3xl: 24px;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(0, 0, 0, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--spacing-xl);
        box-shadow: var(--shadow-xl);
        border-top: 1px solid rgba(0, 245, 212, 0.3);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        color: white;
        padding: var(--spacing-lg);
        font-size: var(--font-size-lg);
    }

    .menu-toggle {
        display: block;
    }

    .hero {
        padding: 160px 0 var(--spacing-3xl);
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .features,
    .components,
    .platforms {
        padding: var(--spacing-3xl) 0;
    }

    .features-grid,
    .components-grid,
    .platforms-grid {
        grid-template-columns: 1fr;
    }

    .download-note {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .footer-content {
        flex-direction: column;
    }

    .footer-links {
        justify-content: flex-start;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 var(--spacing-lg);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-description {
        font-size: var(--font-size-base);
    }
}