/* 无尽对对乐 - 下载页样式 */
/* 暗色玻璃拟态风格 */

:root {
    /* 背景色 */
    --bg-primary: #040A16;
    --bg-gradient-top: #0A1628;
    --bg-gradient-mid: #081220;
    --bg-gradient-bottom: #050A12;
    
    /* 品牌色 */
    --brand-cyan: #67C8FF;
    --brand-cyan-light: #A9E8FF;
    --brand-cyan-glow: rgba(103, 200, 255, 0.45);
    --brand-cyan-soft: rgba(103, 200, 255, 0.12);
    --brand-cyan-border: rgba(103, 200, 255, 0.4);
    
    /* 玻璃拟态 */
    --glass-bg: rgba(10, 20, 35, 0.55);
    --glass-bg-hover: rgba(10, 20, 35, 0.7);
    --glass-border: rgba(103, 200, 255, 0.3);
    --glass-border-top: rgba(255, 255, 255, 0.2);
    
    /* 文字色 */
    --text-primary: #F8FAFC;
    --text-secondary: #ACB6C3;
    --text-tertiary: rgba(248, 250, 252, 0.7);
    --text-weak: rgba(248, 250, 252, 0.55);
    
    /* 按钮 */
    --btn-text: #05101A;
    
    /* 阴影 */
    --shadow-glow: 0 0 30px rgba(103, 200, 255, 0.3);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    background: linear-gradient(180deg, var(--bg-gradient-top) 0%, var(--bg-gradient-mid) 50%, var(--bg-gradient-bottom) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* 背景光晕 */
.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
}

.bg-glow-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(103, 200, 255, 0.15) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    animation: float 20s ease-in-out infinite;
}

.bg-glow-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(100, 120, 255, 0.1) 0%, transparent 70%);
    bottom: 10%;
    left: -100px;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

/* 主容器 */
.container {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 20px;
}

/* Hero 区域 */
.hero {
    text-align: center;
    padding: 60px 0 40px;
    animation: fadeInUp 0.8s ease-out;
}

.logo-wrapper {
    margin-bottom: 24px;
}

.logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-glow);
    animation: pulse 3s ease-in-out infinite;
}

.logo svg {
    width: 56px;
    height: 56px;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 30px rgba(103, 200, 255, 0.3); }
    50% { box-shadow: 0 0 50px rgba(103, 200, 255, 0.5); }
}

.title {
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(90deg, var(--brand-cyan), var(--brand-cyan-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.slogan {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.tags {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.tag {
    display: inline-block;
    padding: 8px 16px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    font-size: 14px;
    color: var(--text-tertiary);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.tag:hover {
    border-color: var(--brand-cyan-border);
    background: var(--brand-cyan-soft);
    transform: translateY(-2px);
}

/* 通用区块标题 */
.section-title {
    text-align: center;
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 32px;
}

/* 下载区域 */
.download-section {
    padding: 40px 0;
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.download-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 36px 28px;
    text-align: center;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-border-top), transparent);
}

.download-card.active:hover {
    transform: translateY(-8px);
    border-color: var(--brand-cyan-border);
    box-shadow: var(--shadow-card), var(--shadow-glow);
    background: var(--glass-bg-hover);
}

.download-card.disabled {
    opacity: 0.6;
    filter: grayscale(0.5);
}

.card-icon {
    color: var(--brand-cyan);
    margin-bottom: 16px;
    display: flex;
    justify-content: center;
}

.download-card.disabled .card-icon {
    color: var(--text-weak);
}

.platform-name {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.download-card.disabled .platform-name {
    color: var(--text-secondary);
}

.platform-info {
    font-size: 14px;
    color: var(--brand-cyan);
    margin-bottom: 4px;
}

.download-card.disabled .platform-info {
    color: var(--text-tertiary);
}

.platform-require {
    font-size: 12px;
    color: var(--text-weak);
    margin-bottom: 24px;
}

/* 下载按钮 */
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    background: linear-gradient(90deg, var(--brand-cyan), var(--brand-cyan-light));
    color: var(--btn-text);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(103, 200, 255, 0.3);
    min-width: 160px;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(103, 200, 255, 0.4);
}

.download-btn:active {
    transform: translateY(0);
}

.disabled-btn {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-weak);
    cursor: not-allowed;
    box-shadow: none;
}

.disabled-btn:hover {
    transform: none;
    box-shadow: none;
}

.btn-text {
    display: inline-flex;
    align-items: center;
}

/* 功能特色 */
.features-section {
    padding: 40px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 28px 20px;
    text-align: center;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--brand-cyan-border);
    box-shadow: 0 4px 20px rgba(103, 200, 255, 0.15);
}

.feature-icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.feature-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* 更新日志 */
.changelog-section {
    padding: 40px 0;
}

.changelog-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 28px 32px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.version-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.version-tag {
    display: inline-block;
    padding: 6px 14px;
    background: linear-gradient(90deg, var(--brand-cyan), var(--brand-cyan-light));
    color: var(--btn-text);
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
}

.version-date {
    font-size: 14px;
    color: var(--text-tertiary);
}

.changelog-list {
    list-style: none;
    padding: 0;
}

.changelog-list li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 15px;
    color: var(--text-tertiary);
}

.changelog-list li:last-child {
    border-bottom: none;
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 40px 0 20px;
    color: var(--text-weak);
    font-size: 14px;
}

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

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

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

/* 响应式 - 平板 */
@media (max-width: 768px) {
    .container {
        padding: 30px 16px;
    }
    
    .hero {
        padding: 24px 0 20px;
    }
    
    .title {
        font-size: 32px;
    }
    
    .slogan {
        font-size: 15px;
        margin-bottom: 16px;
    }
    
    .download-cards {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .download-card {
        padding: 24px 20px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .feature-card {
        padding: 20px 16px;
    }
    
    .section-title {
        font-size: 22px;
        margin-bottom: 20px;
    }
    
    .changelog-card {
        padding: 20px;
    }
}

/* 响应式 - 手机 */
@media (max-width: 480px) {
    .container {
        padding: 20px 12px;
        /* iPhone 安全区域 */
        padding-bottom: max(20px, env(safe-area-inset-bottom));
    }
    
    .hero {
        padding: 16px 0;
    }
    
    .logo {
        width: 64px;
        height: 64px;
        border-radius: 16px;
    }
    
    .logo svg {
        width: 36px;
        height: 36px;
    }
    
    .title {
        font-size: 26px;
        margin-bottom: 8px;
    }
    
    .slogan {
        font-size: 14px;
        margin-bottom: 12px;
    }
    
    .tags {
        gap: 8px;
    }
    
    .tag {
        font-size: 12px;
        padding: 6px 10px;
    }
    
    .download-cards {
        gap: 12px;
    }
    
    .download-card {
        padding: 20px 16px;
    }
    
    .platform-name {
        font-size: 18px;
    }
    
    .platform-info {
        font-size: 13px;
    }
    
    .download-btn {
        width: 100%;
        padding: 14px 20px;
        min-width: auto;
    }
    
    .features-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    
    .feature-card {
        padding: 16px 12px;
    }
    
    .feature-icon {
        font-size: 28px;
        margin-bottom: 8px;
    }
    
    .feature-card h4 {
        font-size: 14px;
    }
    
    .feature-card p {
        font-size: 12px;
    }
    
    .section-title {
        font-size: 20px;
        margin-bottom: 16px;
    }
    
    .changelog-card {
        padding: 16px;
    }
    
    .version-tag {
        font-size: 12px;
        padding: 4px 10px;
    }
    
    .changelog-list li {
        font-size: 13px;
        padding: 8px 0;
    }
    
    .footer {
        padding: 24px 0 16px;
        font-size: 12px;
    }
}

/* 响应式 - 超小屏 */
@media (max-width: 360px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .title {
        font-size: 24px;
    }
}