/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', '楷体', cursive, sans-serif;
}

body {
    background: #f0f8ff;
    min-height: 100vh;
}

/* 主标题 */
.header-title {
    text-align: center;
    font-size: 2.8rem;
    color: #2c5f2d;
    margin: 30px 0;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    position: relative;
}

.header-title::after {
    content: '';
    display: block;
    width: 120px;
    height: 4px;
    background: #4CAF50;
    margin: 15px auto;
    border-radius: 2px;
}

/* 登录页样式 */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
}

.login-box {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    width: 90%;
    max-width: 450px;
    backdrop-filter: blur(10px);
}

.password-input {
    width: 100%;
    padding: 15px;
    margin: 20px 0;
    border: 2px solid #81c784;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.password-input:focus {
    border-color: #4CAF50;
    outline: none;
}

.login-btn {
    width: 100%;
    padding: 15px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(76, 175, 80, 0.3);
}

.error-msg {
    color: #d32f2f;
    display: none;
    margin-top: 15px;
    text-align: center;
    font-weight: bold;
}

/* 跑马灯公告 */
.announcement {
    background: linear-gradient(90deg, #fff3d8, #ffecb3);
    margin: 20px auto;
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    width: 95%;
    max-width: 1200px;
    border: 2px solid #ffd54f;
}

.announcement-content {
    display: inline-block;
    padding: 12px 0;
    white-space: nowrap;
    animation: marquee 25s linear infinite;
    font-size: 16px;
    color: #d84315;
}

@keyframes marquee {
    0% { transform: translateX(100%); }
    100% { transform: translateX(-100%); }
}

.announcement-icon {
    margin-right: 15px;
    font-size: 18px;
}

/* 媒体播放器 */
.media-container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 20px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.media-player {
    width: 100%;
    min-height: 500px;
    background: #000;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.media-content {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.loading-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #4CAF50;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 控制台 */
.video-controls {
    margin-top: 20px;
    display: flex;
    gap: 15px;
    align-items: center;
}

.control-btn {
    padding: 12px 25px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.control-btn:hover {
    opacity: 0.9;
}

#volume {
    flex-grow: 1;
    height: 8px;
    accent-color: #4CAF50;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-title {
        font-size: 2rem;
        margin: 20px 0;
    }

    .media-player {
        min-height: 300px;
    }

    .announcement-content {
        font-size: 14px;
        animation-duration: 15s;
    }

    .login-box {
        padding: 25px;
        margin: 20px;
    }

    .video-controls {
        flex-direction: column;
    }

    #volume {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .header-title {
        font-size: 1.8rem;
    }

    .announcement {
        margin: 10px;
        border-radius: 8px;
    }

    .media-container {
        padding: 10px;
    }
}