@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;600&display=swap');

/* 基础排版系统 */
:root {
    --font-stack: "Helvetica Neue", "Avenir", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --color-text-primary: #333333;
    --color-text-secondary: #666666;
}

body {
    font-family: var(--font-stack);
    color: var(--color-text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: #ffffff;
    overflow-x: hidden;
}

/* 极简滚动条设计 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #e0e0e0;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #c0c0c0;
}

/* 沉浸式动效 */
.fade-in-up {
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
    transform: translateY(30px);
}

.fade-in {
    animation: fadeIn 1.2s ease-out forwards;
    opacity: 0;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 延迟控制 */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-500 { animation-delay: 500ms; }

/* 视觉交互增强 */
.group:hover .zoom-image {
    transform: scale(1.05);
}

.zoom-image {
    transition: transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
    will-change: transform;
}

/* 文本选择颜色 */
::selection {
    background: rgba(51, 51, 51, 0.1);
    color: #000;
}

/* 辅助类 */
.text-balance {
    text-wrap: balance;
}

.aspect-portrait {
    aspect-ratio: 3/4;
}

.backdrop-blur-md {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}