/* 主容器 */
.container {
    max-width: 1200px; /* PC端宽屏显示 */
    margin: 0 auto;
    padding: 20px;
}
.top_container{text-align: center; padding: 50px 0 0 0;}
/* --- Header / Hero --- */
header {
    padding: 60px 0 40px;
    text-align: center;
    background: white;
    position: relative;
}
.app-logo {  margin-bottom: 20px; }
h1 { font-size: 32px; font-weight: 800; color: var(--text-dark); margin-bottom: 10px; }
.intro-text { font-size: 18px; color: var(--brand-green); font-weight: 600; }

/* --- 下载区域 --- */
.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 40px 0;
}
.download-card {
    background: white;
    padding: 30px 20px;
    border-radius: 20px;
    text-align: center;
    border: 1px solid var(--border-soft);
    transition: var(--transition);
}
.download-card:hover { transform: translateY(-5px); box-shadow: 0 12px 24px rgba(0,0,0,0.05); border-color: var(--brand-green); }
.platform-name { font-size: 16px; font-weight: 700; margin-bottom: 15px; display: block; }
.btn-dl {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 25px;
    background: var(--text-dark);
    color: white;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 15px;
}
.btn-dl:hover{color:rgba(255,255,255,0.6); text-decoration: none;}
.dl-ios { background: #000; }
.dl-android { background: var(--brand-green); }
.dl-harmony { background: linear-gradient(135deg, #000, #1a237e); }

.qr-small { width: 100px; height: 100px; margin: 0 auto; display: block; border: 1px solid #eee; padding: 5px; border-radius: 8px; }

/* --- 内容排版区 --- */
.content-section { padding: 40px 0; }

/* 核心卖点卡片布局 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}
.text-card {
    background: white;
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--border-soft);
    height: 100%;
}
.text-card h2 {
    font-size: 20px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    color: var(--text-dark);
}
.text-card h2::before {
    content: "";
    width: 4px;
    height: 20px;
    background: var(--brand-green);
    margin-right: 12px;
    border-radius: 2px;
}
.text-card p { font-size: 15px; color: var(--text-muted); margin-bottom: 10px; }
.highlight-blue { color: var(--brand-blue); font-weight: 600; text-decoration: none; }

/* 特殊：情感化全宽卡片 */
.full-card {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, #4caf50 0%, #2e7d32 100%);
    color: white;
    border: none;
}
.full-card h2 { color: white; }
.full-card h2::before { background: white; }
.full-card p { color: rgba(255,255,255,0.9); }

/* 引导区域 */
.cta-box {
    text-align: center;
    padding: 80px 0;
    margin-top: 40px;
}
.cta-box h3 { font-size: 24px; margin-bottom: 25px; }
.btn-huge {
    background: var(--brand-green);
    color: white;
    padding: 18px 60px;
    border-radius: 40px;
    text-decoration: none;
    font-size: 20px;
    font-weight: 800;
    box-shadow: 0 10px 20px rgba(76, 175, 80, 0.3);
    transition: var(--transition);
}
.btn-huge:hover { transform: scale(1.05); box-shadow: 0 15px 30px rgba(76, 175, 80, 0.4); color:rgba(255,255,255,0.6); text-decoration: none;}

/* 页脚 */
footer { text-align: center; color: #94a3b8; font-size: 12px; padding: 20px 0; border-top: 1px solid #eee; }

/* 响应式调整 */
@media (max-width: 760px) {
    .download-grid, .feature-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 26px; }
    .qr-small { display: none; } /* 移动端隐藏二维码节省空间 */
}
@media (prefers-color-scheme: dark) {
    :root {
        /* 背景与基础色 */
        --bg-body: #12141a;       /* 极深蓝黑背景 */
        --card-bg: #1c1f26;       /* 卡片背景，比底色稍浅，增加浮现感 */
        --bg-gray: #252932;       /* 搜索框、输入框、表头等次级背景 */

        /* 文字色 */
        --text-dark: #e2e8f0;     /* 主文字：浅灰白 */
        --text-muted: #94a3b8;    /* 辅助文字：中灰蓝 */

        /* 边框与线 */
        --border-soft: #2d333f;   /* 线条：深灰色 */

        /* 品牌色在深色下的微调 */
        --brand-green: #4ade80;   /* 调亮一点的绿色，增加对比 */
        --brand-green-light: rgba(74, 222, 128, 0.15);
        --brand-blue: #60a5fa;
        --brand-orange: #fbbf24;
    }
    .platform-name{color: var(--text-muted);}
    .text-card h2{color: var(--text-muted);}
    .text-card p{color: var(--text-dark);}
}