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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.login-container {
    width: 100%;
    max-width: 400px;
    position: relative;
    z-index: 1;
}

/* Logo区域 */
.logo-section {
    text-align: center;
    margin-bottom: 40px;
    animation: fadeInDown 0.8s ease;
}

.logo-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #fff 0%, #f0f0f0 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: #667eea;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.app-title {
    font-size: 32px;
    font-weight: 700;
    color: white;
    margin-bottom: 10px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.app-subtitle {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 300;
}

/* 登录卡片 */
.login-card {
    background: white;
    border-radius: 20px;
    padding: 40px 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 0.8s ease;
}

.login-title {
    font-size: 24px;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
    text-align: center;
}

.login-desc {
    font-size: 14px;
    color: #999;
    text-align: center;
    margin-bottom: 30px;
}

/* 登录按钮 */
.wechat-login-btn,
.phone-login-btn {
    width: 100%;
    height: 50px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.wechat-login-btn {
    background: linear-gradient(135deg, #07c160 0%, #06ae56 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(7, 193, 96, 0.3);
}

.wechat-login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(7, 193, 96, 0.4);
}

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

.phone-login-btn {
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
}

.phone-login-btn:hover {
    background: #667eea;
    color: white;
}

.wechat-login-btn i,
.phone-login-btn i {
    font-size: 20px;
}

/* 登录提示 */
.login-hint {
    font-size: 12px;
    color: #999;
    text-align: center;
    margin: -10px 0 15px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.login-hint i {
    font-size: 14px;
    color: #667eea;
}

/* 手机号登录表单 */
.phone-login-form {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid #eee;
    animation: slideDown 0.3s ease;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #f5f5f5;
    padding: 15px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.form-group label:focus-within {
    background: #fff;
    box-shadow: 0 0 0 2px #667eea;
}

.form-group i {
    color: #999;
    font-size: 16px;
    width: 20px;
}

.form-group input {
    flex: 1;
    border: none;
    background: transparent;
    outline: none;
    font-size: 14px;
    color: #333;
}

.form-group input::placeholder {
    color: #999;
}

.submit-btn {
    width: 100%;
    height: 50px;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

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

.form-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
    font-size: 14px;
}

.form-footer a {
    color: #667eea;
    text-decoration: none;
}

.form-footer a:hover {
    text-decoration: underline;
}

/* 错误提示 */
.error-message {
    background: #fee;
    color: #c33;
    padding: 12px;
    border-radius: 8px;
    margin-top: 20px;
    font-size: 14px;
    text-align: center;
    animation: shake 0.5s ease;
}

/* 服务条款 */
.terms {
    text-align: center;
    margin-top: 30px;
    font-size: 12px;
    color: #999;
}

.terms a {
    color: #667eea;
    text-decoration: none;
}

.terms a:hover {
    text-decoration: underline;
}

/* 底部装饰 */
.decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 20s ease-in-out infinite;
}

.circle-1 {
    width: 300px;
    height: 300px;
    top: -150px;
    right: -150px;
}

.circle-2 {
    width: 200px;
    height: 200px;
    bottom: -100px;
    left: -100px;
    animation-delay: -5s;
}

.circle-3 {
    width: 150px;
    height: 150px;
    top: 50%;
    left: 50%;
    animation-delay: -10s;
}

/* 加载提示 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    text-align: center;
    color: white;
}

.loading-spinner i {
    font-size: 48px;
    margin-bottom: 20px;
}

.loading-spinner p {
    font-size: 16px;
}

/* 动画 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
    }
    to {
        opacity: 1;
        max-height: 500px;
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* 响应式设计 */
@media (max-width: 480px) {
    .login-card {
        padding: 30px 20px;
    }
    
    .app-title {
        font-size: 28px;
    }
    
    .login-title {
        font-size: 20px;
    }
}