:root {
    --gold: rgba(255, 215, 0, 0.8);
    --gold-light: rgba(255, 215, 0, 0.4);
    --black: #000;
}

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

body {
    background-color: var(--black);
    color: var(--gold-light);
    font-family: "Times New Roman", serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.container {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 60px 20px;
}

/* 背景装饰 */
.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: 
        radial-gradient(circle at 30% 20%, rgba(255,215,0,0.05) 0%, transparent 60%),
        radial-gradient(circle at 70% 80%, rgba(255,215,0,0.04) 0%, transparent 50%);
}

/* 漂浮粒子 */
.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.particles span {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--gold-light);
    border-radius: 50%;
    opacity: 0.4;
    filter: blur(1px);
    animation: particleFloat 12s infinite linear;
    box-shadow: 0 0 10px rgba(255,215,0,0.3);
}

.particles span:nth-child(1) { left: 20%; top: 30%; animation-delay: 0s; }
.particles span:nth-child(2) { left: 70%; top: 20%; animation-delay: -3s; }
.particles span:nth-child(3) { left: 40%; top: 80%; animation-delay: -6s; }
.particles span:nth-child(4) { left: 80%; top: 60%; animation-delay: -9s; }
.particles span:nth-child(5) { left: 30%; top: 50%; animation-delay: -12s; }

/* 光晕球效果 */
.light-orbs {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.orb {
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle at center, 
        rgba(255,215,0,0.05) 0%, 
        rgba(255,215,0,0.02) 50%, 
        transparent 70%
    );
    animation: orbFloat 20s infinite ease-in-out;
    filter: blur(30px);
}

.orb:nth-child(1) {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.orb:nth-child(2) {
    top: 60%;
    left: 70%;
    width: 250px;
    height: 250px;
    animation-delay: -7s;
}

.orb:nth-child(3) {
    top: 70%;
    left: 30%;
    width: 180px;
    height: 180px;
    animation-delay: -14s;
}

@keyframes particleFloat {
    0% {
        transform: translate(0, 0) rotate(0deg);
        opacity: 0;
    }
    20% {
        opacity: 0.4;
    }
    80% {
        opacity: 0.4;
    }
    100% {
        transform: translate(150px, -150px) rotate(360deg);
        opacity: 0;
    }
}

@keyframes orbFloat {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(-30px, 30px) scale(1.1);
    }
    50% {
        transform: translate(30px, -30px) scale(0.9);
    }
    75% {
        transform: translate(30px, 30px) scale(1.1);
    }
}

/* 标题样式 */
.title {
    text-align: center;
    margin-bottom: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

h1 {
    font-size: 28px;
    font-weight: 300;
    letter-spacing: 12px;
    color: var(--gold);
    position: relative;
    padding: 0 20px;
}

/* 标题装饰 */
.title-decoration {
    display: flex;
    align-items: center;
    gap: 15px;
    width: 200px;
}

.title-decoration.top {
    justify-content: center;
}

.title-decoration.bottom {
    justify-content: space-between;
}

.title-decoration i {
    font-size: 12px;
    color: var(--gold-light);
}

.title-decoration .line {
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--gold-light) 20%,
        var(--gold-light) 80%,
        transparent
    );
    flex: 1;
}

.title-decoration.top .line {
    width: 60px;
}

.title-decoration.bottom .line {
    width: 80px;
}

/* 书本样式 */
.book-container {
    position: relative;
    width: 250px;
    height: 320px;
    margin: 0 auto;
}

.book {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    cursor: pointer;
    transition: all 1s ease-in-out;
}

.book.flipping {
    transform: rotateY(180deg);
    opacity: 0;
}

.book-cover {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,215,0,0.2), rgba(255,215,0,0.1));
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 
        0 10px 30px rgba(255,215,0,0.1);
    backface-visibility: hidden;
    border: 1px solid rgba(255,215,0,0.2);
    overflow: hidden;
}

.book-cover i {
    font-size: 48px;
    color: var(--gold-light);
    margin-bottom: 20px;
}

.book-title {
    font-size: 18px;
    color: rgba(255,215,0,0.6);
    letter-spacing: 4px;
    margin-top: 20px;
}

/* 结果卡片样式 */
.result-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease;
    backdrop-filter: blur(5px);
    background: linear-gradient(
        to bottom,
        rgba(0,0,0,0.4),
        rgba(0,0,0,0.6)
    );
}

.result-container.visible {
    opacity: 1;
    visibility: visible;
}

.result-card {
    background: rgba(0,0,0,0.8);
    border-radius: 25px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    text-align: center;
    border: 0.5px solid rgba(255,215,0,0.2);
    backdrop-filter: blur(5px);
    position: relative;
    overflow: hidden;
}

.result-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at center, 
            rgba(255,215,0,0.05) 0%, 
            transparent 50%
        );
    animation: resultBgRotate 20s linear infinite;
    pointer-events: none;
    filter: blur(20px);
}

@keyframes resultBgRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.answer-text {
    font-size: 28px;
    line-height: 1.5;
    margin: 40px 0;
    font-weight: 300;
    color: var(--gold);
}

/* 按钮样式 */
.retry-button {
    background: none;
    border: none;
    cursor: pointer;
    width: 60px;
    height: 60px;
    position: relative;
    margin-top: 20px;
    transition: transform 0.3s ease;
}

.magic-wand {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.magic-wand i {
    font-size: 32px;
    color: var(--gold);
    transform: rotate(-15deg);
    filter: drop-shadow(0 0 8px rgba(255,215,0,0.3));
    transition: all 0.3s ease;
}

.sparkles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.sparkles span {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--gold);
    border-radius: 50%;
    opacity: 0;
    animation: sparkle 1.5s ease-in-out infinite;
}

.sparkles span:nth-child(1) {
    top: 10%;
    left: 50%;
    animation-delay: 0s;
}

.sparkles span:nth-child(2) {
    top: 50%;
    left: 90%;
    animation-delay: 0.2s;
}

.sparkles span:nth-child(3) {
    top: 90%;
    left: 40%;
    animation-delay: 0.4s;
}

.retry-button:hover {
    transform: scale(1.1);
}

.retry-button:hover .magic-wand i {
    color: var(--gold-light);
    filter: drop-shadow(0 0 12px rgba(255,215,0,0.5));
    transform: rotate(0deg);
}

@keyframes sparkle {
    0% {
        transform: scale(0) rotate(0deg);
        opacity: 0;
    }
    50% {
        transform: scale(1) rotate(180deg);
        opacity: 1;
    }
    100% {
        transform: scale(0) rotate(360deg);
        opacity: 0;
    }
}

/* 工具类 */
.hidden {
    display: none;
}

/* 星星动画 */
.stars {
    position: absolute;
    width: 100%;
    height: 100%;
    animation: starsMove 100s linear infinite;
}

.star {
    position: absolute;
    width: 3px;
    height: 3px;
    background: var(--gold-light);
    border-radius: 50%;
    animation: twinkle 4s infinite;
    box-shadow: 0 0 5px rgba(255,215,0,0.3);
}

@keyframes twinkle {
    0%, 100% { opacity: 0.2; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.3); }
}

@keyframes starsMove {
    from { transform: translateY(0); }
    to { transform: translateY(-100%); }
}

/* 书本翻转阴影效果 */
.book::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 20px;
    background: radial-gradient(ellipse at center, rgba(255,215,0,0.2) 0%, transparent 70%);
    filter: blur(5px);
}

/* 书本封面图标 */
.book-cover i {
    font-size: 48px;
    color: rgba(255,215,0,0.6);
    margin-bottom: 20px;
}

/* 结果卡片图标 */
.result-card i.ri-sparkle-fill {
    font-size: 24px;
    color: var(--gold-light);
    opacity: 0.4;
    margin-bottom: 30px;
}

/* 重试按钮图标 */
.button-content i {
    font-size: 24px;
    color: var(--gold-light);
    opacity: 0.6;
}

/* 神秘圆环装饰 */
.mystic-circles {
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background: 
        radial-gradient(circle at center, transparent 30%, rgba(255,215,0,0.03) 31%, transparent 32%),
        radial-gradient(circle at center, transparent 36%, rgba(255,215,0,0.02) 37%, transparent 38%),
        radial-gradient(circle at center, transparent 43%, rgba(255,215,0,0.01) 44%, transparent 45%);
    animation: rotateCircles 20s linear infinite;
    opacity: 0.5;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.4; filter: drop-shadow(0 0 10px rgba(255,215,0,0.2)); }
    50% { opacity: 0.6; filter: drop-shadow(0 0 15px rgba(255,215,0,0.3)); }
}

@keyframes rotateCircles {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes gradientMove {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(-2%, 2%); }
    50% { transform: translate(2%, -2%); }
    75% { transform: translate(-2%, -2%); }
}