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

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
    background: #f2f5f9;
    min-height: 66vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
}

/* 主卡片容器 - 体现光明日报的稳重与权威感 */
.container {
    max-width: 520px;
    width: 100%;
    background: #ffffff;
    border-radius: 28px;
    box-shadow: 0 20px 60px rgba(0, 20, 40, 0.08), 0 8px 24px rgba(0, 0, 0, 0.04);
    padding: 40px 32px 36px;
    text-align: center;
    transition: transform 0.2s ease;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

/* 报头标识 - 强化品牌 */
.brand-header {
    margin-bottom: 24px;
}

.brand-name {
    font-size: 20px;
    font-weight: 700;
    color: #1a2a4a;
    letter-spacing: 4px;
    position: relative;
    display: inline-block;
}

.brand-name::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #b31b1b, #d43d3d);
    border-radius: 2px;
}

.brand-sub {
    font-size: 13px;
    color: #7a8aa3;
    margin-top: 12px;
    letter-spacing: 1px;
}

/* 主要图标 */
.main-icon {
    margin: 16px 0 20px;
}

.main-icon svg {
    width: 72px;
    height: 72px;
    color: #b31b1b;
    opacity: 0.85;
}

/* 标题与说明文字 */
.title {
    font-size: 20px;
    font-weight: 600;
    color: #1a2a4a;
    margin-bottom: 10px;
}

.desc {
    font-size: 15px;
    color: #4a5a72;
    line-height: 1.7;
    margin-bottom: 10px;
}

.desc strong {
    color: #b31b1b;
    font-weight: 600;
}

/* 二维码容器 - 模拟卡片 */
.qr-wrapper {
    background: #f8faff;
    border-radius: 20px;
    padding: 24px 20px 0px;
    margin-bottom: 10px;
    border: 1px dashed #d0d8e4;
}

.qr-placeholder {
    margin: 0 auto 12px;
    background: #ffffff;
    padding: 12px;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.qr-placeholder svg {
    display: block;
    width: 100%;
    height: auto;
    background: #ffffff;
    border-radius: 8px;
}

.qr-hint {
    font-size: 14px;
    color: #2a3a5a;
    font-weight: 500;
}

.qr-hint small {
    display: block;
    font-size: 13px;
    font-weight: 400;
    color: #7a8aa3;
    margin-top: 4px;
}

/* 操作按钮 */
.btn-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    border-radius: 40px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s ease;
    border: none;
    cursor: pointer;
    min-width: 120px;
    background: #f0f3f8;
    color: #4a5a72;
}

.btn-primary {
    background: #b31b1b;
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(179, 27, 27, 0.25);
}

.btn-primary:hover {
    background: #9e1515;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(179, 27, 27, 0.30);
}

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

.btn-outline {
    background: transparent;
    border: 1.5px solid #d0d8e4;
}

.btn-outline:hover {
    background: #f8faff;
    border-color: #b31b1b;
    color: #b31b1b;
}

/* 底部提示 */
.footer-note {
    margin-top: 13px;
    font-size: 13px;
    color: #9aabbe;
    border-top: 1px solid #eef2f7;
    padding-top: 20px;
    letter-spacing: 0.3px;
}

.footer-note a {
    color: #7a8aa3;
    text-decoration: none;
}

.footer-note a:hover {
    color: #b31b1b;
}

/* 响应式 */
@media (max-width: 420px) {
    .container {
        padding: 28px 18px 24px;
    }

    .brand-name {
        font-size: 18px;
        letter-spacing: 2px;
    }

    .title {
        font-size: 18px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 15px;
        min-width: 100px;
    }

    .qr-placeholder {
        max-width: 130px;
        padding: 8px;
    }
}