* {
    box-sizing: border-box;
    font-family: system-ui, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
}

body {
    background: linear-gradient(145deg, #f5f7fc 0%, #e9eef4 100%);
    margin: 0;
    padding: 24px 20px;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* 返回首页按钮 */
.back-home-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, #2c5f8a 0%, #1d4668 100%);
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(44, 95, 138, 0.3);
    margin-bottom: 20px;
}

.back-home-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(44, 95, 138, 0.5);
    background: linear-gradient(135deg, #1d4668 0%, #2c5f8a 100%);
}

.back-home-btn i {
    font-size: 0.95rem;
}

/* 头部 */
.header {
    text-align: center;
    margin-bottom: 40px;
}

.header h1 {
    font-size: 2.6rem;
    background: linear-gradient(135deg, #1a2a3a, #2c5368);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.header p {
    color: #4a627a;
    font-size: 1rem;
}

/* 双栏布局 */
.dashboard {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
}

.card {
    flex: 1;
    min-width: 320px;
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(2px);
    border-radius: 32px;
    box-shadow: 0 20px 35px -12px rgba(0,0,0,0.15);
    overflow: hidden;
    transition: transform 0.2s ease;
    border: 1px solid rgba(255,255,255,0.5);
}

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

.card-header {
    background: #ffffffcc;
    padding: 20px 24px 12px 24px;
    border-bottom: 2px solid #e2e8f0;
}

.card-header h2 {
    margin: 0;
    font-size: 1.6rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    color: #1e2f3e;
}

.card-body {
    padding: 24px;
}

/* 上传区域 */
.upload-area {
    border: 2px dashed #b9cadb;
    border-radius: 24px;
    padding: 24px 16px;
    text-align: center;
    background: #f8fafd;
    transition: all 0.2s;
    cursor: pointer;
    margin-bottom: 20px;
}

.upload-area:hover {
    border-color: #3b7c9c;
    background: #f0f4fa;
}

.upload-icon {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

.file-input {
    display: none;
}

.btn {
    background: #2c5f8a;
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: 40px;
    font-weight: 500;
    cursor: pointer;
    transition: 0.2s;
    font-size: 0.9rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.btn-primary {
    background: #2c5f8a;
}
.btn-primary:hover {
    background: #1d4668;
    transform: scale(0.98);
}
.btn-secondary {
    background: #4f6f8f;
}
.btn-secondary:hover {
    background: #3a546e;
}
.btn-accent {
    background: #c44536;
}
.btn-accent:hover {
    background: #a33426;
}
.btn-generate {
    background: #2d6a4f;
    font-size: 1rem;
    padding: 12px 24px;
}
.btn-generate:hover {
    background: #1f543e;
}
button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 图片列表 */
.image-list {
    margin: 20px 0;
    max-height: 280px;
    overflow-y: auto;
    background: #ffffffb0;
    border-radius: 20px;
    padding: 8px;
}

.image-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: white;
    margin: 8px 0;
    padding: 8px 12px;
    border-radius: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    border: 1px solid #e2edf2;
}

.image-item img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 12px;
    background: #f0f0f0;
}

.image-item .info {
    flex: 1;
    font-size: 0.8rem;
    font-weight: 500;
    color: #2c3e4e;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.image-item button {
    background: #eef2f6;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    padding: 4px 10px;
    border-radius: 30px;
    transition: 0.1s;
}
.image-item button:hover {
    background: #d4dfea;
}

.param-row {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin: 20px 0;
    background: #f8fafd;
    padding: 14px;
    border-radius: 24px;
}

.param-group {
    flex: 1;
    min-width: 120px;
}
.param-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: #3b5e7a;
    margin-bottom: 6px;
}
.param-group input, .param-group select {
    width: 100%;
    padding: 8px 10px;
    border-radius: 40px;
    border: 1px solid #cbdde9;
    background: white;
    font-size: 0.85rem;
}

/* 视频预览 */
.video-preview {
    background: #1a2a2f;
    border-radius: 24px;
    margin: 16px 0;
    text-align: center;
    padding: 10px;
}
video {
    max-width: 100%;
    max-height: 200px;
    border-radius: 20px;
}

.progress-bar {
    background: #e2e8f0;
    border-radius: 40px;
    height: 10px;
    overflow: hidden;
    margin: 15px 0;
}
.progress-fill {
    width: 0%;
    height: 100%;
    background: #2c5f8a;
    transition: width 0.2s;
}

.result-area {
    margin-top: 25px;
    text-align: center;
    background: #ffffffcc;
    border-radius: 28px;
    padding: 20px;
}
.result-gif {
    max-width: 100%;
    max-height: 280px;
    border-radius: 20px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
    margin-top: 12px;
}
.download-btn {
    margin-top: 15px;
    display: inline-block;
}

.info-text {
    font-size: 0.8rem;
    color: #5e7c97;
    margin-top: 10px;
}
hr {
    margin: 16px 0;
    border-color: #cbdde9;
}
footer {
    text-align: center;
    margin-top: 50px;
    color: #6c8eaa;
    font-size: 0.8rem;
}
@media (max-width: 850px) {
    .dashboard { flex-direction: column; }
    .back-home-btn {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
    .back-home-btn span {
        display: none;
    }
}