:root {
    /* 背景色 - 更深邃玄幻的渐变色 */
    --bg-primary: #020205;
    --bg-secondary: #080812;
    --bg-tertiary: #0f0a18;

    /* 太极主题色 */
    --yin-black: #0a0a0a;
    --yang-white: #f0f0f0;

    /* 霓虹色系 - 更鲜艳的玄幻配色 */
    --golden: #ffd700;
    --golden-glow: rgba(255, 215, 0, 0.8);
    --gold-deep: #b8860b;
    --silver: #e0e8f0;
    --silver-glow: rgba(224, 232, 240, 0.7);
    --jade: #00ff88;
    --jade-glow: rgba(0, 255, 136, 0.7);
    --jade-deep: #00a86b;

    /* 新增玄幻配色 */
    --mystic-purple: #9b59b6;
    --mystic-purple-glow: rgba(155, 89, 182, 0.7);
    --celestial-blue: #3498db;
    --celestial-blue-glow: rgba(52, 152, 219, 0.7);
    --ethereal-cyan: #00d4ff;
    --ethereal-cyan-glow: rgba(0, 212, 255, 0.8);
    --spirit-red: #ff4757;
    --spirit-red-glow: rgba(255, 71, 87, 0.7);
}

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

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'KaiTi', 'Segoe UI', serif;
    background: var(--bg-primary);
    color: var(--yang-white);
    position: relative;
    /* 动态背景渐变 */
    background: radial-gradient(ellipse at center, var(--bg-tertiary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
    background-size: 200% 200%;
    animation: cosmicShift 30s ease-in-out infinite;
}

/* 动态背景动画 */
@keyframes cosmicShift {
    0%, 100% {
        background-position: 50% 50%;
    }
    25% {
        background-position: 60% 40%;
    }
    50% {
        background-position: 40% 60%;
    }
    75% {
        background-position: 60% 60%;
    }
}

/* Three.js 容器 */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

/* 哲学短句 */
.philosophy-quotes {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 10;
}

.quote {
    position: absolute;
    font-size: 1rem;
    font-weight: 300;
    letter-spacing: 0.3em;
    opacity: 0;
    transform: scale(0.5);
    /* 增强光晕效果 */
    text-shadow: 0 0 0px var(--golden-glow), 0 0 0px var(--mystic-purple-glow);
    transition: all 1.2s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--golden);
    /* 毛玻璃效果 */
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    padding: 8px 16px;
    border-radius: 20px;
    background: rgba(0, 0, 0, 0.1);
}

/* 激活状态的短句 - 炫酷出现特效 */
.quote.active {
    opacity: 0.9;
    transform: scale(1.1);
    text-shadow:
        0 0 10px var(--golden-glow),
        0 0 20px var(--golden-glow),
        0 0 40px var(--mystic-purple-glow),
        0 0 80px var(--ethereal-cyan-glow);
    /* 毛玻璃效果增强 */
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 215, 0, 0.3);
    box-shadow: 0 0 30px rgba(255, 215, 0, 0.2);
}

/* 非激活状态的短句 */
.quote.inactive {
    opacity: 0.2;
    transform: scale(0.9);
    text-shadow: 0 0 8px var(--golden-glow);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

.quote-1 {
    top: 8%;
    left: 10%;
}

.quote-2 {
    top: 18%;
    right: 12%;
    color: var(--silver);
}

.quote-3 {
    top: 30%;
    left: 12%;
    color: var(--jade);
}

.quote-4 {
    top: 45%;
    right: 8%;
    transform: translateY(-50%);
    color: var(--golden);
}

.quote-5 {
    top: 60%;
    right: 18%;
    color: var(--silver);
}

/* 响应式设计 - 优化移动端体验 */
@media (max-width: 1024px) {
    .quote {
        font-size: 0.9rem;
        padding: 6px 12px;
    }

    .beian-info {
        font-size: 0.7rem;
    }
}

@media (max-width: 768px) {
    .quote {
        font-size: 0.75rem;
        letter-spacing: 0.2em;
        padding: 5px 10px;
    }

    .quote-1 {
        top: 6%;
        left: 8%;
    }

    .quote-2 {
        top: 16%;
        right: 8%;
    }

    .quote-3 {
        top: 28%;
        left: 8%;
    }

    .quote-4 {
        right: 5%;
        font-size: 0.7rem;
        top: 42%;
    }

    .quote-5 {
        top: 56%;
        right: 10%;
    }

    .beian-info {
        font-size: 0.65rem;
        bottom: 8px;
    }
}

@media (max-width: 480px) {
    .quote {
        font-size: 0.65rem;
        letter-spacing: 0.15em;
        padding: 4px 8px;
        border-radius: 15px;
    }

    .quote-1 {
        top: 5%;
        left: 5%;
    }

    .quote-2 {
        top: 14%;
        right: 5%;
    }

    .quote-3 {
        top: 26%;
        left: 5%;
    }

    .quote-4 {
        display: none;
    }

    .quote-5 {
        top: 46%;
        right: 5%;
    }

    .beian-info {
        font-size: 0.6rem;
        bottom: 5px;
    }
}

@media (max-width: 375px) {
    .quote {
        font-size: 0.55rem;
        letter-spacing: 0.1em;
        padding: 3px 6px;
    }

    .quote-2 {
        display: none;
    }
}

/* 备案号 */
.beian-info {
    position: fixed;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    font-size: 0.75rem;
    color: var(--silver);
    text-shadow: 0 0 10px var(--silver-glow);
}

.beian-info a {
    color: var(--silver);
    text-decoration: none;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.beian-info a:hover {
    color: var(--golden);
    text-shadow: 0 0 15px var(--golden-glow);
    text-decoration: underline;
}

/* 性能优化：减少重绘 */
* {
    will-change: auto;
}

.quote,
.beian-info {
    will-change: opacity, transform;
}

/* 鼠标光晕效果 */
#cursor-glow {
    position: fixed;
    width: 300px;
    height: 300px;
    pointer-events: none;
    z-index: 0;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.08) 0%, rgba(155, 89, 182, 0.04) 40%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
    mix-blend-mode: screen;
}

/* 加载动画 */
#loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

#loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-spinner {
    position: relative;
    width: 120px;
    height: 120px;
}

.loader-spinner::before,
.loader-spinner::after {
    content: '';
    position: absolute;
    border-radius: 50%;
}

.loader-spinner::before {
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-top-color: var(--golden);
    border-right-color: var(--golden);
    animation: spin 1.2s linear infinite;
}

.loader-spinner::after {
    width: 70%;
    height: 70%;
    top: 15%;
    left: 15%;
    border: 2px solid transparent;
    border-top-color: var(--mystic-purple);
    border-left-color: var(--mystic-purple);
    animation: spin 0.8s linear infinite reverse;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg) scale(1);
    }
}

/* 能量线效果 */
.energy-line {
    position: fixed;
    pointer-events: none;
    z-index: 5;
    opacity: 0;
}

/* 星星闪烁效果 */
.star {
    position: fixed;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    pointer-events: none;
    z-index: 2;
    animation: twinkle 3s ease-in-out infinite;
}

@keyframes twinkle {
    0%, 100% {
        opacity: 0.2;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.5);
    }
}

/* 移动端优化 */
@media (max-width: 768px) {
    #cursor-glow {
        display: none;
    }
}