/* 主卡片 */
.download-card {
width: 1100px;
padding: 3rem 2.5rem;
margin:10px auto;
}

.download-card:hover {
transform: translateY(-4px);
}

/* 头部区域 */
.header {
text-align: center;
margin-bottom: 2.5rem;
}

.app-icon {
font-size: 4rem;
color: #1e5f9e;
background: rgba(30, 95, 158, 0.08);
width: 96px;
height: 96px;
line-height: 96px;
border-radius: 28px;
margin: 0 auto 1.5rem;
display: flex;
align-items: center;
justify-content: center;
box-shadow: 0 15px 25px -10px rgba(30, 95, 158, 0.2);
transition: all 0.2s;
}

.app-icon i {
font-size: 3.5rem;
filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.05));
}

h1 {
font-size: 2.7rem;
font-weight: 700;
letter-spacing: -0.02em;
color: #0a2540;
margin-bottom: 0.6rem;
line-height: 1.2;
}

.subhead {
font-size: 1.2rem;
color: #3a5f7a;
font-weight: 400;
display: flex;
align-items: center;
justify-content: center;
gap: 0.75rem;
flex-wrap: wrap;
}

.free-badge {
background: #1e5f9e;
color: white;
font-weight: 600;
font-size: 0.85rem;
padding: 0.25rem 1rem;
border-radius: 40px;
letter-spacing: 0.3px;
text-transform: uppercase;
box-shadow: 0 4px 8px rgba(30, 95, 158, 0.3);margin-left:10px;
}

/* 核心功能三列布局 */
.features {
display: flex;
flex-wrap: wrap;
gap: 1.8rem;
justify-content: center;
margin: 2.8rem 0 2.5rem;
}

.feature-item {
flex: 1 1 140px;
text-align: center;
padding: 1rem 0.5rem;
background: rgba(255, 255, 255, 0.5);
border-radius: 1.8rem;
transition: background 0.2s;
}

.feature-item i {
font-size: 2rem;
color: #1e5f9e;
margin-bottom: 1rem;
background: rgba(30, 95, 158, 0.08);
padding: 0.8rem;
border-radius: 18px;
width: 64px;
height: 64px;
display: inline-flex;
align-items: center;
justify-content: center;
}

.feature-item h3 {
font-size: 1.1rem;
font-weight: 600;
color: #0a2540;
margin-bottom: 0.3rem;
}

.feature-item p {
font-size: 0.9rem;
color: #4a6a85;
line-height: 1.4;
}

/* 下载按钮主区域 */
.download-zone {
display: flex;
flex-direction: column;
align-items: center;
gap: 1.2rem;
margin-top: 1rem;
}

.download-btn {
display: inline-flex;
align-items: center;
justify-content: center;
gap: 1rem;
background: #1e5f9e;
color: white;
border: none;
border-radius: 60px;
font-size: 1.5rem;
font-weight: 600;
padding: 1.2rem 2.8rem;
width: 100%;
max-width: 400px;
cursor: pointer;
transition: all 0.2s ease;
box-shadow: 0 20px 30px -12px rgba(30, 95, 158, 0.4),
inset 0 1px 2px rgba(255, 255, 255, 0.3);
text-decoration: none;
letter-spacing: -0.01em;
border: 1px solid rgba(255, 255, 255, 0.2);
}

.download-btn i {
font-size: 1.6rem;
transition: transform 0.2s;
}

.download-btn:hover {
background: #164a7a;
transform: scale(1.02);
box-shadow: 0 24px 36px -12px rgba(30, 95, 158, 0.55);
}

.download-btn:hover i {
transform: translateY(3px);
}

.download-btn:active {
transform: scale(0.98);
box-shadow: 0 10px 20px -8px rgba(30, 95, 158, 0.5);
}

/* 版本/系统信息 */
.meta-info {
display: flex;
flex-wrap: wrap;
justify-content: center;
align-items: center;
gap: 1.5rem 2.5rem;
margin-top: 2rem;
color: #4e6f8a;
font-size: 0.95rem;
font-weight: 500;
}

.meta-info span {
display: flex;
align-items: center;
gap: 0.6rem;
}
.meta-info span:not(:last-of-type){margin-right:20px;}
.meta-info i {
color: #1e5f9e;
font-size: 1rem;
}

/* 细小的免费提示 */
.free-note {
display: flex;
justify-content: center;
align-items: center;
gap: 0.6rem;
margin: 2.2rem 0 0.5rem;
background: #e4f0fa;
padding: 0.8rem 1.8rem;
border-radius: 60px;
color: #1e5f9e;
font-weight: 500;
font-size: 1rem;
width: fit-content;
margin-left: auto;
margin-right: auto;
border: 1px solid rgba(30, 95, 158, 0.1);
}

.free-note i {
font-size: 1.2rem;
}

/* 底部小字 */
.footer-note {
margin-top: 2.2rem;
font-size: 0.8rem;
color: #7b98b0;
text-align: center;
border-top: 1px solid rgba(30, 95, 158, 0.12);
padding-top: 1.5rem;
letter-spacing: 0.2px;
}

.footer-note a {
color: #1e5f9e;
text-decoration: none;
font-weight: 500;
}

.footer-note a:hover {
text-decoration: underline;
}

/* 响应式适配 */
@media (max-width: 600px) {
.download-card {
padding: 2rem 1.5rem;
}
h1 {
font-size: 2rem;
}
.subhead {
font-size: 1rem;
}
.download-btn {
font-size: 1.2rem;
padding: 1rem 1.5rem;
}
.features {
gap: 1rem;
}
.feature-item i {
width: 52px;
height: 52px;
font-size: 1.6rem;
}
.meta-info {
gap: 1rem;
font-size: 0.85rem;
}
}

@media (max-width: 400px) {
.app-icon {
width: 72px;
height: 72px;
line-height: 72px;
}
.app-icon i {
font-size: 2.6rem;
}
.free-badge {
font-size: 0.7rem;
}
}

/* 下载反馈提示 (简单纯css反馈) */
.toast-message {
position: fixed;
bottom: 30px;
left: 50%;
transform: translateX(-50%) translateY(20px);
background: #0a2540;
color: white;
padding: 0.9rem 2.2rem;
border-radius: 60px;
font-weight: 500;
opacity: 0;
transition: opacity 0.2s, transform 0.2s;
pointer-events: none;
box-shadow: 0 20px 35px -10px rgba(0,0,0,0.4);
z-index: 999;
white-space: nowrap;
font-size: 0.95rem;
}

.toast-message.show {
opacity: 1;
transform: translateX(-50%) translateY(0);
}