/* ===== 全局样式 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #030712;
    --bg-secondary: #020510;
    --bg-glass: rgba(255, 255, 255, 0.02);
    --border: rgba(255, 255, 255, 0.05);
    --border-hover: rgba(6, 182, 212, 0.3);
    --cyan: #06b6d4;
    --cyan-light: #22d3ee;
    --blue: #3b82f6;
    --purple: #8b5cf6;
    --text: #fff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 粒子画布 */
#particles {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

/* 通用 */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 999px;
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
    color: var(--cyan-light);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.gradient-text {
    background: linear-gradient(135deg, var(--cyan), var(--blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 16px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--cyan), var(--blue));
    color: #fff;
}

.btn-primary:hover {
    box-shadow: 0 8px 30px rgba(6, 182, 212, 0.3);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid rgba(6, 182, 212, 0.3);
}

.btn-outline:hover {
    background: rgba(6, 182, 212, 0.1);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 18px 36px;
    font-size: 18px;
}

.btn-arrow {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* 代码样式 */
.code-comment { color: #6b7280; font-style: italic; }
.code-str { color: #34d399; }
.code-keyword { color: #c084fc; }
.code-func { color: #60a5fa; }
.code-bool { color: #f472b6; }
.code-type { color: #fbbf24; }
.code-cmd { color: #9ca3af; }

/* 响应式 */
@media (max-width: 768px) {
    .section-container { padding: 0 16px; }
    .section-header { margin-bottom: 40px; }
}