/* 登录页面特效样式 */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --neon-glow: 0 0 20px rgba(102, 126, 234, 0.5);
}

body.login-page {
    background: linear-gradient(-45deg, #0f0c29, #302b63, #24243e, #1a1a2e) !important;
    background-size: 400% 400% !important;
    animation: gradient 15s ease infinite !important;
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow-x: hidden;
    position: relative;
    margin: 0;
    padding: 0;
}

@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    z-index: 10;
    background: none !important;
}

/* 背景装饰元素 */
.bg-decoration {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 0;
}

.floating-element {
    position: absolute;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    animation: float 6s ease-in-out infinite;
}

.floating-element:nth-child(1) {
    width: 80px;
    height: 80px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.floating-element:nth-child(2) {
    width: 120px;
    height: 120px;
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.floating-element:nth-child(3) {
    width: 60px;
    height: 60px;
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

/* 科技网格背景 */
.tech-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(rgba(102, 126, 234, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(102, 126, 234, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
    z-index: 1;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

/* 数据流效果 */
.data-stream {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.stream-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, #667eea, transparent);
    animation: streamFlow 3s linear infinite;
    filter: blur(1px);
}

@keyframes streamFlow {
    0% { transform: translateX(-100%); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateX(100%); opacity: 0; }
}

/* 粒子效果 */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #667eea;
    border-radius: 50%;
    animation: particleFloat 6s ease-in-out infinite;
    filter: blur(1px);
}

@keyframes particleFloat {
    0%, 100% { transform: translate(0, 0) scale(1); opacity: 0; }
    50% { transform: translate(20px, -20px) scale(1.5); opacity: 1; }
}

/* 二进制数字雨 */
.binary-rain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 4;
    pointer-events: none;
    overflow: hidden;
}

.binary-column {
    position: absolute;
    top: -100px;
    color: rgba(102, 126, 234, 0.3);
    font-family: 'Courier New', monospace;
    font-size: 14px;
    font-weight: bold;
    animation: binaryFall 10s linear infinite;
}

@keyframes binaryFall {
    0% { transform: translateY(-100px); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(100vh); opacity: 0; }
}

/* 光环效果 */
.halo {
    position: fixed;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.2), transparent 70%);
    animation: haloPulse 8s ease-in-out infinite;
    z-index: 5;
}

.halo-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.halo-2 {
    width: 200px;
    height: 200px;
    bottom: 20%;
    right: 15%;
    animation-delay: 2s;
}

.halo-3 {
    width: 150px;
    height: 150px;
    top: 60%;
    left: 20%;
    animation-delay: 4s;
}

@keyframes haloPulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.2); opacity: 0.6; }
}

/* 扫描线效果 */
.scan-line {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #667eea, transparent);
    box-shadow: 0 0 10px #667eea;
    animation: scanMove 4s linear infinite;
    z-index: 6;
}

@keyframes scanMove {
    0% { top: 0; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

/* 连接线效果 */
.connection-lines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 7;
    pointer-events: none;
}

.connection-line {
    position: absolute;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.5), transparent);
    animation: connectionPulse 4s ease-in-out infinite;
}

@keyframes connectionPulse {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 1; }
}

/* 登录卡片样式 */
.login-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--neon-glow);
    position: relative;
    z-index: 8;
    transition: all 0.3s ease;
}

.login-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.4);
}

.logo-section {
    text-align: center;
    margin-bottom: 40px;
}

.logo-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: var(--neon-glow);
    animation: pulse 2s infinite;
}

.logo-icon i {
    font-size: 2rem;
    color: white;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.system-title {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(45deg, #fff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
}

.system-subtitle {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    font-weight: 300;
}

.form-group {
    margin-bottom: 25px;
    position: relative;
}

.form-label {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.input-group {
    position: relative;
}

.input-group-text {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-right: none;
    color: rgba(255, 255, 255, 0.7);
    padding: 12px 15px;
}

.form-control {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-left: none;
    color: white;
    padding: 12px 15px;
    transition: all 0.3s ease;
}

.form-control:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(102, 126, 234, 0.6);
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    color: white;
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-check {
    margin-bottom: 25px;
}

.form-check-input {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.form-check-input:checked {
    background: var(--primary-gradient);
    border-color: rgba(102, 126, 234, 0.6);
}

.form-check-label {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.btn-login {
    background: var(--primary-gradient);
    border: none;
    border-radius: 10px;
    padding: 12px;
    font-weight: 600;
    font-size: 1rem;
    color: white;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

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

.btn-login::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-login:hover::before {
    left: 100%;
}

.error-alert {
    background: rgba(220, 53, 69, 0.2);
    border: 1px solid rgba(220, 53, 69, 0.3);
    border-radius: 10px;
    padding: 15px;
    margin-top: 20px;
    backdrop-filter: blur(10px);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.error-alert i {
    color: #ff6b6b;
}

.error-alert span {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

/* 响应式设计 */
@media (max-width: 576px) {
    .login-card {
        padding: 30px 20px;
        margin: 20px;
    }

    .system-title {
        font-size: 1.5rem;
    }

    .logo-icon {
        width: 60px;
        height: 60px;
    }

    .logo-icon i {
        font-size: 1.5rem;
    }
}