/* ========================================
   主样式 - 重置、布局、通用样式、动画
   ======================================== */

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

/* 基础样式 */
body {
    font-family:
        "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    background: url("../images/background.png") no-repeat center center fixed;
    background-size: cover;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 20px;
}

/* 容器 */
.container {
    width: 100%;
    max-width: 800px;
}

/* 面板基础样式 */
.panel {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
}

.panel h1 {
    text-align: center;
    color: #e91e63;
    margin-bottom: 30px;
    font-size: 2.2em;
    text-shadow: 2px 2px 4px rgba(233, 30, 99, 0.1);
}

/* 表单样式 */
.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
    font-size: 1.1em;
}

.form-group .hint {
    font-weight: normal;
    color: #888;
    font-size: 0.9em;
}

input[type="text"],
input[type="number"],
textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s ease;
    font-family: inherit;
}

input[type="text"]:focus,
input[type="number"]:focus,
textarea:focus {
    outline: none;
    border-color: #e91e63;
    box-shadow: 0 0 0 3px rgba(233, 30, 99, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

/* 按钮样式 */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: linear-gradient(135deg, #e91e63 0%, #ff5252 100%);
    color: white;
    width: 100%;
    margin-top: 10px;
}

.btn-secondary {
    background: linear-gradient(135deg, #78909c 0%, #90a4ae 100%);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, #4caf50 0%, #66bb6a 100%);
    color: white;
}

.btn-large {
    padding: 18px 48px;
    font-size: 22px;
    border-radius: 15px;
}

/* 响应式设计 */
@media (max-width: 600px) {
    .panel {
        padding: 25px;
    }

    .panel h1 {
        font-size: 1.8em;
    }

    .btn-large {
        padding: 14px 32px;
        font-size: 18px;
    }
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 庆祝彩带动画 */
.celebration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    background: #ffd700;
    animation: confettiFall 3s ease-out forwards;
}

@keyframes confettiFall {
    0% {
        transform: translateY(-100vh) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}