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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f6f6f6;
    color: #313131;
    -webkit-tap-highlight-color: transparent;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 40px 20px;
}

.logo-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 24px;
}

.logo {
    width: 80px;
    height: 80px;
    border-radius: 16px;
    object-fit: cover;
    margin-bottom: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.app-name {
    font-size: 20px;
    font-weight: bold;
    color: #313131;
}

.invite-code {
    margin-top: 8px;
    font-size: 13px;
    color: #f65835;
}

.slogan {
    font-size: 14px;
    color: #999999;
    margin-bottom: 32px;
}

/* 扫码下载区域 */
.qrcode-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: #ffffff;
    border-radius: 16px;
    padding: 24px 32px;
    margin-bottom: 32px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.qrcode-title {
    font-size: 15px;
    font-weight: 600;
    color: #313131;
    margin-bottom: 16px;
}

.qrcode-img {
    width: 160px;
    height: 160px;
    border-radius: 8px;
    object-fit: contain;
}

.qrcode-tip {
    margin-top: 12px;
    font-size: 12px;
    color: #999999;
}

.btn {
    width: 80%;
    max-width: 320px;
    height: 48px;
    line-height: 48px;
    text-align: center;
    border-radius: 24px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
    margin-bottom: 16px;
    border: none;
    outline: none;
}

.btn:active {
    opacity: 0.85;
}

.btn-primary {
    background-color: #f65835;
    color: #ffffff;
}

.btn-outline {
    background-color: #ffffff;
    color: #f65835;
    border: 1px solid #f65835;
}

.btn-open {
    background-color: #ffffff;
    color: #f65835;
    border: 1px solid #f65835;
    margin-top: 8px;
}