/* ============================================================
 * 基础重置 + 全局样式 — 暗色系
 * ============================================================ */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.25s var(--ease-smooth);
}

a:hover {
    color: var(--color-green);
}

img {
    max-width: 100%;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

::selection {
    background: var(--color-green);
    color: var(--color-bg);
}

/* 暗色系滚动条 */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-border-2); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-4); }

/* 噪点纹理背景 */
.noise-bg {
    position: relative;
}

.noise-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.04;
    pointer-events: none;
    z-index: 1;
}

.noise-bg > * {
    position: relative;
    z-index: 2;
}

/* 容器 */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.main-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
    flex: 1;
    width: 100%;
}

/* 动画 */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.animate-float {
    animation: float 6s ease-in-out infinite;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeInUp 0.6s var(--ease-snappy);
}

/* 渐变光效装饰 */
.glow-green {
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
    filter: blur(40px);
}

.glow-orange {
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.08) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
    filter: blur(40px);
}