:root {
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --glass-bg: rgba(15, 23, 42, 0.6);
    --glass-border: rgba(255, 255, 255, 0.1);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

body {
    background: #0f172a;
    background-image: 
        radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), 
        radial-gradient(at 50% 0%, hsla(225,39%,30%,1) 0, transparent 50%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,1) 0, transparent 50%);
    color: #e2e8f0;
    min-height: 100vh;
    overflow-x: hidden;
    font-family: 'Noto Sans SC', sans-serif;
    -webkit-tap-highlight-color: transparent;
}

/* 粒子背景优化 */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background-image: 
        radial-gradient(1px 1px at 20px 30px, #fff, rgba(0,0,0,0)),
        radial-gradient(1.5px 1.5px at 40px 70px, #a5b4fc, rgba(0,0,0,0)),
        radial-gradient(1px 1px at 90px 40px, #fff, rgba(0,0,0,0));
    background-repeat: repeat;
    background-size: 200px 200px;
    opacity: 0.3;
    z-index: 0;
}

/* 玻璃拟态容器 */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--card-shadow);
}

/* 3D 卡牌容器 */
.card-container {
    perspective: 1000px;
}
.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
    cursor: pointer;
}
.card-inner.is-flipped {
    transform: rotateY(180deg);
}
.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 16px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}
.card-back {
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
    border: 1px solid rgba(255, 215, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}
.card-pattern {
    width: 90%;
    height: 90%;
    border: 1px solid rgba(255, 215, 0, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.card-front {
    background-color: #f8fafc;
    color: #1e293b;
    transform: rotateY(180deg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    border: 2px solid #fbbf24;
}

/* 牌堆网格优化 */
.deck-card {
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    cursor: pointer;
    position: relative;
}
.deck-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4);
}
.deck-card:active {
    transform: scale(0.95);
}
.deck-card.is-selected {
    transform: scale(0.9) translateY(10px);
    opacity: 0.5;
    filter: grayscale(100%);
    pointer-events: none;
}
/* 选中序号标记 */
.deck-card-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 24px;
    height: 24px;
    background: #fbbf24;
    color: #0f172a;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 12px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    animation: popIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 10;
}
@keyframes popIn {
    from { transform: scale(0); }
    to { transform: scale(1); }
}
/* 入场动画延迟 */
.deck-card-enter {
    opacity: 0;
    transform: translateY(20px);
    animation: cardEnter 0.5s forwards;
}
@keyframes cardEnter {
    to { opacity: 1; transform: translateY(0); }
}

/* Markdown 优化样式 */
.prose h3 { 
    color: #fbbf24; 
    font-size: 1.3rem; 
    margin-top: 1.5rem; 
    margin-bottom: 0.75rem; 
    font-weight: 700; 
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.prose strong { 
    color: #60a5fa; 
    font-weight: 600;
}
.prose ul { 
    list-style: none; 
    padding-left: 0; 
    margin-bottom: 1rem;
}
.prose li {
    position: relative;
    padding-left: 1.2em;
    margin-bottom: 0.5em;
    line-height: 1.6;
    color: #cbd5e1;
}
.prose li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #fbbf24;
    font-weight: bold;
}
.prose p {
    margin-bottom: 1em;
    line-height: 1.7;
    color: #e2e8f0;
    text-align: justify;
}

/* 动画 */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.animate-float {
    animation: float 6s ease-in-out infinite;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}