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

body {
    font-family: 'Playfair Display', 'Times New Roman', serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #8B0000 0%, #4A0000 50%, #2D0000 100%);
}

/* 返回按钮 */
.back-button {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: rgba(218, 165, 32, 0.3);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 215, 0, 0.4);
    border-radius: 25px;
    color: #FFD700;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 20px rgba(218, 165, 32, 0.3);
}

.back-button:hover {
    background: rgba(218, 165, 32, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(218, 165, 32, 0.5);
}

/* 剧院背景 */
.theater-background {
    position: fixed;
    width: 100vw;
    height: 100vh;
    top: 0;
    left: 0;
    z-index: -1;
    overflow: hidden;
}

/* 舞台帷幕 */
.curtain {
    position: absolute;
    top: 0;
    width: 50vw;
    height: 100vh;
    background: linear-gradient(90deg, #8B0000 0%, #A0522D 20%, #8B0000 40%, #A0522D 60%, #8B0000 80%, #A0522D 100%);
    background-size: 20px 100%;
    z-index: 10;
    transition: transform 2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: inset 0 0 50px rgba(0, 0, 0, 0.5);
}

.curtain::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent 0px,
        rgba(255, 215, 0, 0.1) 2px,
        transparent 4px
    );
}

.curtain-left {
    left: 0;
    transform: translateX(-100%);
}

.curtain-right {
    right: 0;
    transform: translateX(100%);
}

.curtain.open.curtain-left {
    transform: translateX(-80%);
}

.curtain.open.curtain-right {
    transform: translateX(80%);
}

/* 聚光灯 */
.spotlight {
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0.1) 40%, transparent 70%);
    pointer-events: none;
    animation: spotlightMove 8s ease-in-out infinite;
}

.spotlight-1 {
    top: 10%;
    left: 20%;
    animation-delay: 0s;
}

.spotlight-2 {
    top: 30%;
    right: 25%;
    animation-delay: 2s;
    animation-direction: reverse;
}

.spotlight-3 {
    bottom: 20%;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 4s;
}

/* 舞台装饰 */
.stage-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
}

.ornament {
    position: absolute;
    font-size: 24px;
    color: #FFD700;
    text-shadow: 0 0 20px #FFD700;
    animation: ornamentFloat 6s ease-in-out infinite;
}

.ornament-1 {
    top: 15%;
    left: 10%;
    animation-delay: 0s;
}

.ornament-2 {
    top: 20%;
    right: 15%;
    animation-delay: 1.5s;
}

.ornament-3 {
    bottom: 25%;
    left: 15%;
    animation-delay: 3s;
}

.ornament-4 {
    bottom: 20%;
    right: 10%;
    animation-delay: 4.5s;
}

/* 金色粒子 */
.golden-particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: radial-gradient(circle, #FFD700 0%, #FFA500 50%, transparent 100%);
    border-radius: 50%;
    animation: particleFloat 8s ease-in-out infinite;
    box-shadow: 0 0 10px #FFD700;
}

.particle:nth-child(1) { top: 20%; left: 25%; animation-delay: 0s; }
.particle:nth-child(2) { top: 40%; left: 75%; animation-delay: 1s; }
.particle:nth-child(3) { top: 60%; left: 15%; animation-delay: 2s; }
.particle:nth-child(4) { top: 80%; left: 85%; animation-delay: 3s; }
.particle:nth-child(5) { top: 30%; left: 45%; animation-delay: 4s; }
.particle:nth-child(6) { top: 70%; left: 65%; animation-delay: 5s; }
.particle:nth-child(7) { top: 10%; left: 55%; animation-delay: 6s; }
.particle:nth-child(8) { top: 90%; left: 35%; animation-delay: 7s; }

/* 舞台烟雾 */
.stage-smoke {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 30%;
}

.smoke-cloud {
    position: absolute;
    bottom: 0;
    width: 200px;
    height: 100px;
    background: radial-gradient(ellipse, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: smokeRise 10s ease-in-out infinite;
}

.cloud-1 {
    left: 20%;
    animation-delay: 0s;
}

.cloud-2 {
    left: 50%;
    animation-delay: 3s;
}

.cloud-3 {
    left: 80%;
    animation-delay: 6s;
}

/* 舞台地板 */
.stage-floor {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 20%;
    background: linear-gradient(180deg, transparent 0%, rgba(139, 69, 19, 0.3) 50%, rgba(101, 67, 33, 0.5) 100%);
}

.floor-pattern {
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        90deg,
        transparent 0px,
        rgba(255, 215, 0, 0.1) 2px,
        transparent 4px,
        transparent 20px
    );
}

/* 表单容器 */
.login-container {
    position: relative;
    z-index: 100;
    width: 90%;
    max-width: 400px;
    margin: 0 auto;
}

.theater-box {
    background: linear-gradient(135deg, rgba(139, 0, 0, 0.9) 0%, rgba(74, 0, 0, 0.95) 100%);
    backdrop-filter: blur(20px);
    border: 3px solid rgba(255, 215, 0, 0.4);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 
        0 0 50px rgba(255, 215, 0, 0.3),
        inset 0 0 50px rgba(255, 215, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.theater-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        45deg,
        transparent 0px,
        rgba(255, 215, 0, 0.05) 1px,
        transparent 2px,
        transparent 20px
    );
    pointer-events: none;
}

.theater-box::after {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: 15px;
    pointer-events: none;
}

.box-header {
    text-align: center;
    margin-bottom: 30px;
}

.theater-lights {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
}

.theater-light {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 215, 0, 0.3);
    border: 2px solid rgba(255, 215, 0, 0.5);
    transition: all 0.3s ease;
}

.theater-light.active {
    background: #FFD700;
    box-shadow: 0 0 20px #FFD700;
    animation: theaterLightBlink 3s ease-in-out infinite;
}

.box-header h2 {
    color: #FFD700;
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
    font-family: 'Playfair Display', serif;
}

.subtitle {
    color: rgba(255, 215, 0, 0.8);
    font-size: 14px;
    font-weight: 300;
    font-style: italic;
}

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

.form-group input {
    width: 100%;
    padding: 15px 20px;
    background: rgba(255, 215, 0, 0.05);
    border: 2px solid rgba(255, 215, 0, 0.3);
    border-radius: 12px;
    color: #FFD700;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.form-group input:focus {
    outline: none;
    border-color: #FFD700;
    box-shadow: 0 0 25px rgba(255, 215, 0, 0.4);
    background: rgba(255, 215, 0, 0.1);
}

.form-group input::placeholder {
    color: rgba(255, 215, 0, 0.5);
}

.form-group label {
    position: absolute;
    top: 15px;
    left: 20px;
    color: rgba(255, 215, 0, 0.7);
    font-size: 16px;
    pointer-events: none;
    transition: all 0.3s ease;
    background: transparent;
}

.form-group input:focus + label,
.form-group input:valid + label {
    top: -10px;
    left: 15px;
    font-size: 12px;
    color: #FFD700;
    background: linear-gradient(135deg, rgba(139, 0, 0, 0.9) 0%, rgba(74, 0, 0, 0.95) 100%);
    padding: 2px 8px;
    border-radius: 6px;
    border: 1px solid rgba(255, 215, 0, 0.3);
}

.input-spotlight {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, #FFD700 0%, #FFA500 50%, #FFD700 100%);
    transition: all 0.4s ease;
    transform: translateX(-50%);
    border-radius: 2px;
}

.form-group input:focus ~ .input-spotlight {
    width: 100%;
    box-shadow: 0 0 15px #FFD700;
}

/* 按钮样式 */
.login-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #B8860B 0%, #DAA520 50%, #FFD700 100%);
    border: 2px solid #FFD700;
    border-radius: 12px;
    color: #8B0000;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    box-shadow: 0 5px 20px rgba(255, 215, 0, 0.3);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.login-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 215, 0, 0.5);
    background: linear-gradient(135deg, #DAA520 0%, #FFD700 50%, #FFFF99 100%);
}

.login-btn:active {
    transform: translateY(-1px);
}

.btn-curtain {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(139, 0, 0, 0.3) 50%, transparent 100%);
    transition: left 0.6s ease;
}

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

.verify-btn {
    padding: 16px 16px;
    background: linear-gradient(135deg, #DAA520 0%, #FFD700 100%);
    border: 1px solid #FFD700;
    border-radius: 8px;
    color: #8B0000;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    flex-shrink: 0;
}

.verify-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.5);
}

.verification-group {
    display: flex;
    align-items: flex-end;
    gap: 10px;
}

.verification-group input {
    flex: 1;
}

/* 链接样式 */
.additional-links {
    text-align: center;
    margin-top: 20px;
}

.additional-links a {
    color: #FFD700;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
    font-style: italic;
}

.additional-links a:hover {
    color: #FFFF99;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.8);
    transform: scale(1.05);
}

.divider {
    color: rgba(255, 215, 0, 0.5);
    margin: 0 15px;
}

/* 隐藏类 */
.hidden {
    display: none;
}

/* 动画关键帧 */
@keyframes spotlightMove {
    0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.3; }
    25% { transform: translate(20px, -10px) scale(1.1); opacity: 0.5; }
    50% { transform: translate(-15px, 15px) scale(0.9); opacity: 0.4; }
    75% { transform: translate(10px, -20px) scale(1.05); opacity: 0.6; }
}

@keyframes ornamentFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-10px) rotate(5deg); }
    50% { transform: translateY(-5px) rotate(-3deg); }
    75% { transform: translateY(-15px) rotate(8deg); }
}

@keyframes particleFloat {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.6; }
    25% { transform: translateY(-20px) scale(1.2); opacity: 1; }
    50% { transform: translateY(-10px) scale(0.8); opacity: 0.8; }
    75% { transform: translateY(-30px) scale(1.1); opacity: 0.9; }
}

@keyframes smokeRise {
    0% { transform: translateY(0) scale(1); opacity: 0.1; }
    50% { transform: translateY(-50px) scale(1.5); opacity: 0.3; }
    100% { transform: translateY(-100px) scale(2); opacity: 0; }
}

@keyframes theaterLightBlink {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.9); }
}

/* 响应式设计 */
@media (max-width: 480px) {
    .login-container {
        width: 95%;
        padding: 0 10px;
    }
    
    .theater-box {
        padding: 20px;
    }
    
    .box-header h2 {
        font-size: 22px;
    }
    
    .form-group input {
        padding: 12px 15px;
        font-size: 14px;
    }
    
    .form-group label {
        font-size: 14px;
        top: 12px;
        left: 15px;
    }
    
    .login-btn {
        padding: 14px;
        font-size: 14px;
    }
    
    .spotlight {
        width: 200px;
        height: 200px;
    }
    
    .ornament {
        font-size: 18px;
    }
    .verify-btn {
        padding: 12px 15px;
        font-size: 12px;
        min-width: 75px;
    }
}

@media (max-width: 320px) {
    .theater-box {
        padding: 15px;
    }
    
    .verification-group {
        gap: 8px;
    }

    .verify-btn {
        padding: 10px 12px;
        font-size: 11px;
        min-width: 70px;
    }
    
    .theater-lights {
        gap: 10px;
    }
    
    .theater-light {
        width: 10px;
        height: 10px;
    }
}