* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

body {
    background: linear-gradient(135deg, #eef6ff, #ffffff);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.card {
    width: 760px;
    background: white;
    border-radius: 20px;
    padding: 35px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, .08);
}

h1 {
    text-align: center;
    color: #2563eb;
    font-size: 30px;
    margin-bottom: 35px;
}

.item {
    margin-bottom: 25px;
}

.label {
    font-size: 15px;
    color: #666;
    margin-bottom: 8px;
}

input[type=password],
select {
    width: 100%;
    height: 48px;
    border-radius: 10px;
    border: 1px solid #d8d8d8;
    padding: 0 15px;
    outline: none;
    font-size: 15px;
    transition: .2s;
}

input[type=password]:focus,
select:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, .12);
}

.btn {
    width: 100%;
    height: 52px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    color: white;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    font-size: 16px;
    font-weight: bold;
    transition: .2s;
    margin-top: 30px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, .35);
}

.btn:disabled {
    opacity: .6;
    cursor: not-allowed;
    transform: none;
}

.toast {
    position: fixed;
    right: 30px;
    top: 30px;
    background: #333;
    color: white;
    padding: 15px 22px;
    border-radius: 10px;
    opacity: 0;
    transition: .3s;
    z-index: 9999;
}

.toast.show {
    opacity: 1;
}

.progress {
    height: 14px;
    background: #ececec;
    border-radius: 8px;
    overflow: hidden;
}

.progress-inner {
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, #60a5fa, #2563eb);
    transition: .15s;
}

.progress-text {
    margin-top: 8px;
    text-align: right;
    color: #666;
    font-size: 13px;
}

.file-list {
    margin-top: 20px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid #e6e6e6;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    border-bottom: 1px solid #efefef;
    background: white;
}

.file-item:last-child {
    border-bottom: none;
}

.file-info {
    flex: 1;
}

.file-name {
    color: #333;
    font-size: 14px;
    font-weight: 600;
}

.file-size {
    color: #999;
    font-size: 12px;
    margin-top: 4px;
}

@media (max-width: 800px) {
    body {
        padding: 15px;
    }

    .card {
        width: 100%;
        padding: 20px;
    }
}


.error-container {
    text-align: center;
    padding: 60px 20px;
}

.error-code {
    font-size: 120px;
    font-weight: bold;
    color: #e5e7eb;
    margin-bottom: 20px;
    line-height: 1;
}

.error-icon {
    font-size: 80px;
    margin-bottom: 20px;
}

.error-title {
    font-size: 28px;
    margin-bottom: 16px;
}

.error-desc {
    color: #6b7280;
    font-size: 16px;
    line-height: 1.6;
    max-width: 380px;
    margin: 0 auto 40px;
}

.btn-small {
    display: inline-block;
    width: auto;
    padding: 12px 32px;
    font-size: 16px;
    text-decoration: none;
}