/* ============================================
   COSMONEXUS - 黑绿科技主题
   Matrix / Terminal / Hacker Style
   ============================================ */

:root {
    /* 纯黑背景 */
    --bg-dark: #000000;
    --bg-primary: #0a0a0a;
    --bg-card: #111111;
    --bg-elevated: #1a1a1a;

    /* 深绿色系 - 更沉稳 */
    --accent-primary: #00c853;      /* 主绿色 */
    --accent-secondary: #00a844;    /* 深绿 */
    --accent-tertiary: #00e676;     /* 亮绿 */
    --accent-dim: #007a33;          /* 暗绿 */

    /* 文字色 */
    --text-primary: #e0e0e0;
    --text-secondary: #808080;
    --text-muted: #404040;
    --text-green: #00c853;

    /* 边框与光效 */
    --border: rgba(0, 200, 83, 0.1);
    --border-accent: rgba(0, 200, 83, 0.3);
    --border-glow: rgba(0, 200, 83, 0.5);

    /* 发光效果 - 更柔和 */
    --glow-primary: 0 0 15px rgba(0, 200, 83, 0.3), 0 0 30px rgba(0, 200, 83, 0.15);
    --glow-intense: 0 0 20px rgba(0, 200, 83, 0.4), 0 0 40px rgba(0, 200, 83, 0.2);
    --glow-soft: 0 0 8px rgba(0, 200, 83, 0.25);

    /* 字体 */
    --font-sans: 'Inter', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

/* 隐藏滚动条 */
html {
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
}

html::-webkit-scrollbar {
    display: none; /* Chrome/Safari/Opera */
}

body {
    font-family: var(--font-sans);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* 选中文字样式 */
::selection {
    background: var(--accent-primary);
    color: var(--bg-dark);
}

/* ============================================
   黑客风格背景
   ============================================ */
.bg-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    background: var(--bg-dark);
}

/* CRT扫描线效果 */
.bg-effects::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.3) 2px,
        rgba(0, 0, 0, 0.3) 4px
    );
    pointer-events: none;
    z-index: 10;
}

/* 终端网格 */
.grid-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(0, 255, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 0, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    -webkit-mask-image: radial-gradient(ellipse 70% 70% at center, black 0%, transparent 70%);
    mask-image: radial-gradient(ellipse 70% 70% at center, black 0%, transparent 70%);
}

/* 绿色光晕 */
.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(150px);
    background: var(--accent-primary);
}

.glow-1 {
    width: 500px;
    height: 500px;
    top: -200px;
    left: -200px;
    opacity: 0.08;
}

.glow-2 {
    width: 400px;
    height: 400px;
    top: 50%;
    right: -150px;
    opacity: 0.06;
}

.glow-3 {
    width: 350px;
    height: 350px;
    bottom: -150px;
    left: 30%;
    opacity: 0.05;
}

/* 扫描线 - 已禁用 */
.scan-line {
    display: none;
}

/* 数据矩阵效果 */
.data-matrix {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.4;
    pointer-events: none;
}

/* ============================================
   导航栏 - 终端风格
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 12px 0;
    background: rgba(0, 0, 0, 0.9);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.navbar::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    opacity: 0.5;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    -webkit-justify-content: space-between;
    justify-content: space-between;
}

.logo {
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    gap: 10px;
}

.logo-symbol {
    font-size: 24px;
    color: var(--accent-primary);
    text-shadow: var(--glow-primary);
    -webkit-animation: blink 3s ease-in-out infinite;
    animation: blink 3s ease-in-out infinite;
}

@-webkit-keyframes blink {
    0%, 90%, 100% { opacity: 1; }
    95% { opacity: 0.3; }
}

@keyframes blink {
    0%, 90%, 100% { opacity: 1; }
    95% { opacity: 0.3; }
}

.logo-text {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--accent-primary);
    text-shadow: var(--glow-soft);
}

.logo-badge {
    padding: 2px 6px;
    background: var(--accent-primary);
    color: var(--bg-dark);
    font-family: var(--font-mono);
    font-size: 9px;
    font-weight: 700;
    border-radius: 2px;
}

/* 语言切换器 */
.lang-switcher {
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    gap: 4px;
    margin-right: 24px;
    font-family: var(--font-mono);
    font-size: 11px;
}

.lang-btn {
    padding: 4px 8px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    cursor: pointer;
    -webkit-transition: all 0.2s;
    transition: all 0.2s;
}

.lang-btn:hover {
    color: var(--text-secondary);
    border-color: var(--text-muted);
}

.lang-btn.active {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background: rgba(0, 255, 0, 0.1);
}

.nav-links {
    display: -webkit-flex;
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
    letter-spacing: 1px;
    text-transform: uppercase;
    position: relative;
    -webkit-transition: all 0.2s;
    transition: all 0.2s;
}

.nav-links a::before {
    content: '>';
    position: absolute;
    left: -12px;
    opacity: 0;
    color: var(--accent-primary);
    -webkit-transition: opacity 0.2s;
    transition: opacity 0.2s;
}

.nav-links a:hover {
    color: var(--accent-primary);
    text-shadow: var(--glow-soft);
}

.nav-links a:hover::before {
    opacity: 1;
}

/* 按钮系统 */
.btn {
    display: -webkit-inline-flex;
    display: inline-flex;
    -webkit-align-items: center;
    align-items: center;
    -webkit-justify-content: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    border: none;
    border-radius: 0;
    cursor: pointer;
    -webkit-transition: all 0.2s;
    transition: all 0.2s;
    position: relative;
}

.btn-primary {
    background: transparent;
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
}

.btn-primary:hover {
    background: var(--accent-primary);
    color: var(--bg-dark);
    box-shadow: var(--glow-primary);
}

.btn-glow {
    background: var(--accent-primary);
    color: var(--bg-dark);
    font-weight: 600;
    border: none;
}

.btn-glow:hover {
    background: var(--accent-tertiary);
    box-shadow: var(--glow-intense);
    -webkit-transform: translateY(-2px);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--text-muted);
}

.btn-outline:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.btn-full { width: 100%; }

.btn-content {
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    gap: 8px;
}

/* ============================================
   Hero区域 - 终端主视觉
   ============================================ */
.hero {
    min-height: 100vh;
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    -webkit-justify-content: center;
    justify-content: center;
    padding: 120px 24px 80px;
    position: relative;
}

.hero-container {
    text-align: center;
    max-width: 850px;
    position: relative;
    z-index: 1;
}

/* 状态指示器 - 终端风格 */
.status-bar {
    display: -webkit-inline-flex;
    display: inline-flex;
    -webkit-align-items: center;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background: rgba(0, 255, 0, 0.05);
    border: 1px solid var(--border-accent);
    margin-bottom: 40px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 1px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: var(--glow-primary);
    -webkit-animation: pulse 1.5s ease-in-out infinite;
    animation: pulse 1.5s ease-in-out infinite;
}

@-webkit-keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.status-text { 
    color: var(--accent-primary); 
}

.status-divider { color: var(--text-muted); }
.status-version { color: var(--text-secondary); }

/* 主标题 - 终端字体 */
.hero-title {
    margin-bottom: 24px;
}

.title-line {
    display: block;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 6px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.title-line::before {
    content: '$ ';
    color: var(--accent-primary);
}

.title-main {
    display: block;
    font-family: var(--font-mono);
    font-size: 72px;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -1px;
}

.gradient-text {
    color: var(--accent-primary);
    text-shadow: var(--glow-primary);
    -webkit-animation: textGlow 2s ease-in-out infinite;
    animation: textGlow 2s ease-in-out infinite;
}

@-webkit-keyframes textGlow {
    0%, 100% { 
        text-shadow: var(--glow-primary);
        opacity: 1;
    }
    50% { 
        text-shadow: var(--glow-intense);
        opacity: 0.95;
    }
}

@keyframes textGlow {
    0%, 100% { 
        text-shadow: var(--glow-primary);
        opacity: 1;
    }
    50% { 
        text-shadow: var(--glow-intense);
        opacity: 0.95;
    }
}

.hero-tagline {
    font-family: var(--font-mono);
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-tagline .highlight {
    color: var(--accent-primary);
    text-shadow: var(--glow-soft);
}

.hero-actions {
    display: -webkit-flex;
    display: flex;
    -webkit-justify-content: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
}

/* 核心指标 - 数据面板 */
.metrics {
    display: -webkit-flex;
    display: flex;
    -webkit-justify-content: center;
    justify-content: center;
    -webkit-align-items: center;
    align-items: center;
    gap: 40px;
    padding: 24px;
    background: rgba(0, 255, 0, 0.02);
    border: 1px solid var(--border);
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-family: var(--font-mono);
    font-size: 32px;
    font-weight: 700;
    color: var(--accent-primary);
    text-shadow: var(--glow-soft);
}

.metric-label {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-top: 4px;
}

.metric-divider {
    width: 1px;
    height: 40px;
    background: var(--border-accent);
}

/* Hero装饰 */
.hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
}

.hex-grid {
    position: absolute;
    top: 20%;
    right: 10%;
    display: -webkit-flex;
    display: flex;
    -webkit-flex-wrap: wrap;
    flex-wrap: wrap;
    gap: 8px;
    opacity: 0.3;
}

.hex {
    width: 20px;
    height: 20px;
    border: 1px solid var(--accent-primary);
    -webkit-animation: hexBlink 2s ease-in-out infinite;
    animation: hexBlink 2s ease-in-out infinite;
}

.hex:nth-child(1) { -webkit-animation-delay: 0s; animation-delay: 0s; }
.hex:nth-child(2) { -webkit-animation-delay: 0.3s; animation-delay: 0.3s; }
.hex:nth-child(3) { -webkit-animation-delay: 0.6s; animation-delay: 0.6s; }
.hex:nth-child(4) { -webkit-animation-delay: 0.9s; animation-delay: 0.9s; }
.hex:nth-child(5) { -webkit-animation-delay: 1.2s; animation-delay: 1.2s; }

@-webkit-keyframes hexBlink {
    0%, 100% { opacity: 0.2; background: transparent; }
    50% { opacity: 0.8; background: rgba(0, 255, 0, 0.1); }
}

@keyframes hexBlink {
    0%, 100% { opacity: 0.2; background: transparent; }
    50% { opacity: 0.8; background: rgba(0, 255, 0, 0.1); }
}

/* ============================================
   通用区块样式
   ============================================ */
section {
    position: relative;
    z-index: 1;
}

.section-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent-primary);
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.section-title {
    font-family: var(--font-mono);
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
}

/* ============================================
   Features区域 - 功能卡片
   ============================================ */
.features {
    padding: 120px 0;
    background: linear-gradient(180deg, 
        transparent 0%, 
        rgba(0, 255, 0, 0.02) 20%,
        rgba(0, 255, 0, 0.02) 80%,
        transparent 100%
    );
}

.features-grid {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-wrap: wrap;
    flex-wrap: wrap;
    gap: 20px;
}

.feature-card {
    -webkit-flex: 1 1 calc(50% - 10px);
    flex: 1 1 calc(50% - 10px);
    min-width: 280px;
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    overflow: hidden;
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 0;
    background: var(--accent-primary);
    -webkit-transition: height 0.3s;
    transition: height 0.3s;
}

.feature-card:hover::before {
    height: 100%;
    box-shadow: var(--glow-soft);
}

.feature-card:hover {
    border-color: var(--border-accent);
    background: rgba(0, 255, 0, 0.02);
}

.card-border {
    display: none;
}

.card-content {
    padding: 32px;
}

.feature-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 20px;
    color: var(--accent-primary);
}

.feature-card:hover .feature-icon {
    filter: drop-shadow(var(--glow-soft));
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-family: var(--font-mono);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card:hover h3 {
    color: var(--accent-primary);
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.feature-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--accent-dim);
    letter-spacing: 1px;
    padding: 4px 8px;
    border: 1px solid var(--border);
}

/* ============================================
   Demo区域 - 终端模拟器
   ============================================ */
.demo {
    padding: 120px 0;
}

.terminal {
    background: var(--bg-dark);
    border: 1px solid var(--border-accent);
    overflow: hidden;
    box-shadow: 0 0 40px rgba(0, 255, 0, 0.1);
}

.terminal-header {
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

.terminal-buttons {
    display: -webkit-flex;
    display: flex;
    gap: 8px;
}

.term-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    opacity: 0.8;
}

.term-btn.red { background: #ff5f57; }
.term-btn.yellow { background: #febc2e; }
.term-btn.green { background: #28c840; }

.terminal-title {
    -webkit-flex: 1;
    flex: 1;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
}

.terminal-status {
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--accent-primary);
    letter-spacing: 1px;
}

.status-indicator {
    width: 6px;
    height: 6px;
    background: var(--accent-primary);
    border-radius: 50%;
    -webkit-animation: pulse 1s ease-in-out infinite;
    animation: pulse 1s ease-in-out infinite;
}

.terminal-body {
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 2;
    min-height: 300px;
}

.terminal-line {
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    gap: 12px;
}

.terminal-line.pending { opacity: 0.3; }

.prompt {
    color: var(--accent-primary);
    font-weight: 700;
}

.command {
    color: var(--text-primary);
}

.cursor {
    display: inline-block;
    width: 8px;
    height: 16px;
    background: var(--accent-primary);
    -webkit-animation: cursorBlink 1s step-end infinite;
    animation: cursorBlink 1s step-end infinite;
    vertical-align: middle;
    margin-left: 2px;
}

@-webkit-keyframes cursorBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

@keyframes cursorBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.output-label {
    color: var(--accent-dim);
    min-width: 70px;
}

.output-text {
    color: var(--text-secondary);
    -webkit-flex: 1;
    flex: 1;
}

.step-status {
    font-size: 10px;
}

.step-status.done { color: var(--accent-primary); }
.step-status.active { color: #febc2e; }
.step-status.pending { color: var(--text-muted); }

.step-time {
    color: var(--text-muted);
    font-size: 11px;
    margin-left: auto;
}

.step-time.blink {
    color: #febc2e;
    -webkit-animation: cursorBlink 0.5s step-end infinite;
    animation: cursorBlink 0.5s step-end infinite;
}

.terminal-progress {
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    gap: 16px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.progress-bar {
    -webkit-flex: 1;
    flex: 1;
    height: 4px;
    background: var(--bg-elevated);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-primary);
    box-shadow: var(--glow-soft);
    -webkit-transition: width 0.3s;
    transition: width 0.3s;
}

.progress-text {
    color: var(--accent-primary);
    font-size: 11px;
    min-width: 80px;
    text-align: right;
}

/* ============================================
   Use Cases区域
   ============================================ */
.usecases {
    padding: 120px 0;
    background: rgba(0, 255, 0, 0.01);
}

.usecase-grid {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-wrap: wrap;
    flex-wrap: wrap;
    gap: 12px;
    -webkit-justify-content: center;
    justify-content: center;
}

.usecase-item {
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    gap: 10px;
    padding: 14px 24px;
    background: transparent;
    border: 1px solid var(--border);
    -webkit-transition: all 0.2s;
    transition: all 0.2s;
    cursor: default;
}

.usecase-item:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 255, 0, 0.05);
}

.usecase-icon {
    font-size: 18px;
}

.usecase-text {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-secondary);
}

.usecase-item:hover .usecase-text {
    color: var(--accent-primary);
}

/* ============================================
   Contact区域 - 输入终端
   ============================================ */
.contact {
    padding: 120px 0;
}

.contact-box {
    max-width: 450px;
    margin: 0 auto;
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    text-align: center;
}

.contact-box::before {
    content: '';
    display: block;
    width: 100%;
    height: 2px;
    background: var(--accent-primary);
    margin: -40px -40px 30px -40px;
    width: calc(100% + 80px);
}

.contact-header {
    margin-bottom: 32px;
}

.contact-header h2 {
    font-family: var(--font-mono);
    font-size: 22px;
    margin: 16px 0 8px;
    color: var(--accent-primary);
}

.contact-header p {
    color: var(--text-secondary);
    font-size: 13px;
}

.contact-form {
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: column;
    flex-direction: column;
    gap: 20px;
    text-align: left;
}

.input-group {
    position: relative;
}

.input-group input {
    width: 100%;
    padding: 14px 12px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--accent-primary);
    font-family: var(--font-mono);
    font-size: 13px;
    -webkit-transition: all 0.2s;
    transition: all 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: var(--glow-soft);
}

.input-group input::-webkit-input-placeholder { 
    color: var(--text-muted); 
    font-family: var(--font-mono);
}
.input-group input::placeholder { 
    color: var(--text-muted); 
    font-family: var(--font-mono);
}

.input-line {
    display: none;
}

.contact-form .btn {
    margin-top: 12px;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 24px 0;
    border-top: 1px solid var(--border);
    background: var(--bg-dark);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: -webkit-flex;
    display: flex;
    -webkit-justify-content: space-between;
    justify-content: space-between;
    -webkit-align-items: center;
    align-items: center;
}

.footer-logo {
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 1px;
    color: var(--accent-primary);
}

.footer-logo .logo-symbol {
    font-size: 18px;
}

.footer-info {
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    gap: 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
}

.footer-divider { color: var(--border); }

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .navbar .btn { display: none; }
    
    .lang-switcher {
        margin-right: 0;
    }

    .title-main { font-size: 42px; }
    .title-line { font-size: 11px; letter-spacing: 3px; }

    .hero-actions {
        -webkit-flex-direction: column;
        flex-direction: column;
        -webkit-align-items: center;
        align-items: center;
    }

    .metrics {
        -webkit-flex-direction: column;
        flex-direction: column;
        gap: 24px;
    }

    .metric-divider {
        width: 60px;
        height: 1px;
    }

    .feature-card {
        -webkit-flex: 1 1 100%;
        flex: 1 1 100%;
    }

    .terminal-body {
        font-size: 11px;
        padding: 16px;
    }

    .contact-box {
        padding: 32px 24px;
    }

    .contact-box::before {
        margin: -32px -24px 24px -24px;
        width: calc(100% + 48px);
    }

    .footer-container {
        -webkit-flex-direction: column;
        flex-direction: column;
        gap: 12px;
    }

    .section-title {
        font-size: 26px;
    }
}

/* 鼠标跟随效果变量 */
.feature-card {
    --mouse-x: 50%;
    --mouse-y: 50%;
}