/* Global Vars */
:root {
    --bg-color: #000000;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-color: #7000ff;
    --accent-rgb: 112, 0, 255;
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(10, 10, 10, 0.7);
}

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

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

.premium-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% -20%, #1a0033 0%, #000 100%);
    z-index: -2;
}

.noise {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../img/noise.png');
    opacity: 0.03;
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Hardcore Navigation */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.nav-container {
    height: 72px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -1px;
    color: #fff;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo::before {
    content: "";
    display: block;
    width: 12px;
    height: 12px;
    background: var(--accent-color);
    border-radius: 2px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 32px;
}

.github-nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
    text-decoration: none;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    opacity: 0.7;
    transition: opacity 0.3s;
}

.github-nav-link:hover {
    opacity: 1;
}

.github-url {
    border-bottom: 1px solid rgba(255,255,255,0.2);
}

#lang-switch {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    padding: 6px 14px;
    border-radius: 4px;
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    font-weight: 700;
    transition: all 0.3s;
}

#lang-switch:hover {
    background: #fff;
    color: #000;
}

/* Hero Section */
header {
    padding-top: 180px;
    padding-bottom: 100px;
}

.tagline {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-color);
    font-size: 0.9rem;
    letter-spacing: 2px;
    margin-bottom: 24px;
    text-transform: uppercase;
}

.hero-title {
    font-size: 5.5rem;
    font-weight: 800;
    letter-spacing: -4px;
    line-height: 0.9;
    margin-bottom: 32px;
    background: linear-gradient(to bottom, #fff 40%, rgba(255,255,255,0.4));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Whitepaper Sections */
.whitepaper-section {
    padding: 120px 0;
    border-top: 1px solid var(--border-color);
}

.content-flex {
    display: flex;
    gap: 100px;
    align-items: flex-start; /* 改为 flex-start 以对齐文字顶部 */
}

.content-info {
    flex: 1;
}

.content-visual {
    flex: 0.9;
    position: sticky; /* 增加粘性定位，解决高度不匹配视觉感 */
    top: 120px;
}

.section-label {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-color);
    font-size: 0.8rem;
    letter-spacing: 4px;
    margin-bottom: 24px;
    opacity: 0.6;
}

.section-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 32px;
    letter-spacing: -1px;
}

.mechanism-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.mechanism-image {
    width: 100%;
    aspect-ratio: 16/10; /* 强制图片比例 */
    object-fit: cover;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 40px 100px rgba(0,0,0,0.8);
    display: block;
}

/* Case Box */
.case-box {
    background: rgba(var(--accent-rgb), 0.05);
    border-left: 3px solid var(--accent-color);
    padding: 30px;
    border-radius: 4px 16px 16px 4px;
    margin-bottom: 40px;
}

.case-title {
    display: block;
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--accent-color);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.case-content {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-primary);
}

/* Lab Code */
.lab-code {
    background: #050505;
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: #4ade80;
    line-height: 1.5;
}

/* Truth Cards */
.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.card {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 24px;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.04);
}

.meta-badge {
    display: inline-block;
    background: var(--accent-color);
    color: #000;
    font-size: 0.65rem;
    font-weight: 900;
    padding: 2px 10px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.card-content {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Footer */
.whitepaper-footer {
    padding: 100px 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    text-align: center;
}

.footer-brand {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 24px;
    color: #fff;
}

.footer-links {
    margin-bottom: 32px;
    display: flex;
    justify-content: center;
    gap: 40px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', monospace;
}

.footer-links a:hover {
    color: var(--accent-color);
}