/* ============================================
   Clash Verge 中文官方网站 - 赛博霓虹风格
   Cyberpunk Neon Aesthetic
   ============================================ */

:root {
    --neon-cyan: #00f5ff;
    --neon-cyan-glow: rgba(0, 245, 255, 0.5);
    --neon-pink: #ff00ff;
    --neon-pink-glow: rgba(255, 0, 255, 0.5);
    --neon-purple: #b829dd;
    --neon-purple-glow: rgba(184, 41, 221, 0.5);
    --neon-green: #39ff14;
    --neon-green-glow: rgba(57, 255, 20, 0.5);

    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: #151520;
    --bg-glass: rgba(21, 21, 32, 0.8);

    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;
    --text-accent: var(--neon-cyan);

    --border-subtle: rgba(255, 255, 255, 0.05);
    --border-neon: rgba(0, 245, 255, 0.3);
    --border-glow: 0 0 20px var(--neon-cyan-glow);

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
    --shadow-neon: 0 0 30px var(--neon-cyan-glow), 0 0 60px var(--neon-purple-glow);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 9999px;

    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    --font-display: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;

    --transition-fast: 150ms cubic-bezier(0.4,0,0.2,1);
    --transition-base: 300ms cubic-bezier(0.4,0,0.2,1);
    --transition-slow: 500ms cubic-bezier(0.4,0,0.2,1);
}

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

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image:
        linear-gradient(rgba(0,245,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,245,255,0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: -1;
}

body::after {
    content: '';
    position: fixed;
    top: -50%; left: -50%; right: -50%; bottom: -50%;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(0,245,255,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(255,0,255,0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(184,41,221,0.05) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
    animation: bgPulse 10s ease-in-out infinite;
}

@keyframes bgPulse { 0%,100%{opacity:1;} 50%{opacity:0.7;} }

a { text-decoration: none; color: inherit; transition: color var(--transition-fast); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-lg); }
.section { padding: var(--space-4xl) 0; position: relative; }
.section-alt { background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%); }

/* Navbar */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(10,10,15,0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}
.navbar::after {
    content: '';
    position: absolute; bottom: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--neon-cyan) 20%, var(--neon-purple) 50%, var(--neon-cyan) 80%, transparent 100%);
    opacity: 0.5;
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 80px; }

.logo { display: flex; align-items: center; gap: var(--space-sm); font-family: var(--font-display); font-size: 1.75rem; font-weight: 700; color: var(--text-primary); letter-spacing: 2px; }
.logo-icon {
    width: 44px; height: 44px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.25rem;
    box-shadow: 0 0 20px var(--neon-cyan-glow);
    animation: logoPulse 2s ease-in-out infinite;
}
@keyframes logoPulse { 0%,100%{box-shadow:0 0 20px var(--neon-cyan-glow);} 50%{box-shadow:0 0 30px var(--neon-cyan-glow),0 0 50px var(--neon-purple-glow);} }
.logo span { background: linear-gradient(135deg, var(--text-primary), var(--neon-cyan)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.nav-menu { display: flex; align-items: center; gap: var(--space-xl); }
.nav-link { font-size: 0.95rem; font-weight: 500; color: var(--text-secondary); padding: var(--space-sm) 0; position: relative; transition: all var(--transition-fast); letter-spacing: 0.5px; }
.nav-link:hover, .nav-link.active { color: var(--neon-cyan); text-shadow: 0 0 10px var(--neon-cyan-glow); }
.nav-link::after {
    content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
    width: 0; height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    transition: width var(--transition-base);
    box-shadow: 0 0 10px var(--neon-cyan-glow);
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.nav-cta {
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    color: var(--bg-primary) !important;
    padding: var(--space-sm) var(--space-lg) !important;
    border-radius: var(--radius-full);
    font-weight: 600;
    box-shadow: 0 4px 15px var(--neon-cyan-glow);
    transition: all var(--transition-base);
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 25px var(--neon-cyan-glow),0 0 40px var(--neon-purple-glow); }
.nav-cta::after { display: none !important; }

.menu-toggle { display: none; flex-direction: column; gap: 6px; cursor: pointer; padding: var(--space-sm); z-index: 1001; }
.menu-toggle span { width: 28px; height: 2px; background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple)); transition: all var(--transition-fast); box-shadow: 0 0 5px var(--neon-cyan-glow); }
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(6px,6px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(6px,-6px); }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl); font-size: 1rem; font-weight: 600;
    border-radius: var(--radius-md); border: none; cursor: pointer;
    transition: all var(--transition-base); font-family: var(--font-body);
    letter-spacing: 0.5px; position: relative; overflow: hidden;
}
.btn::before {
    content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}
.btn:hover::before { left: 100%; }

.btn-primary { background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple)); color: var(--bg-primary); box-shadow: 0 4px 20px var(--neon-cyan-glow); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px var(--neon-cyan-glow),0 0 50px var(--neon-purple-glow); }
.btn-secondary { background: transparent; color: var(--neon-cyan); border: 2px solid var(--neon-cyan); box-shadow: 0 0 10px var(--neon-cyan-glow), inset 0 0 10px var(--neon-cyan-glow); }
.btn-secondary:hover { background: rgba(0,245,255,0.1); box-shadow: 0 0 20px var(--neon-cyan-glow), inset 0 0 20px var(--neon-cyan-glow); }
.btn-accent { background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple)); color: var(--text-primary); box-shadow: 0 4px 20px var(--neon-pink-glow); }
.btn-accent:hover { transform: translateY(-3px); box-shadow: 0 8px 30px var(--neon-pink-glow),0 0 50px var(--neon-purple-glow); }
.btn-lg { padding: var(--space-lg) var(--space-2xl); font-size: 1.1rem; }
.btn-sm { padding: var(--space-sm) var(--space-md); font-size: 0.875rem; }

/* Tags */
.tag { display: inline-flex; align-items: center; gap: var(--space-xs); padding: var(--space-xs) var(--space-md); font-size: 0.75rem; font-weight: 600; border-radius: var(--radius-full); letter-spacing: 0.5px; }
.tag-cyan { background: rgba(0,245,255,0.15); color: var(--neon-cyan); border: 1px solid var(--neon-cyan); box-shadow: 0 0 10px var(--neon-cyan-glow); }
.tag-pink { background: rgba(255,0,255,0.15); color: var(--neon-pink); border: 1px solid var(--neon-pink); box-shadow: 0 0 10px var(--neon-pink-glow); }
.tag-purple { background: rgba(184,41,221,0.15); color: var(--neon-purple); border: 1px solid var(--neon-purple); box-shadow: 0 0 10px var(--neon-purple-glow); }
.tag-green { background: rgba(57,255,20,0.15); color: var(--neon-green); border: 1px solid var(--neon-green); box-shadow: 0 0 10px var(--neon-green-glow); }

/* Page Header */
.page-header {
    padding: calc(80px + var(--space-4xl)) 0 var(--space-3xl);
    text-align: center;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    position: relative;
}
.page-header::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(0,245,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}
.page-title { font-family: var(--font-display); font-size: 3rem; font-weight: 700; color: var(--text-primary); margin-bottom: var(--space-md); text-shadow: 0 0 30px var(--neon-cyan-glow); letter-spacing: 2px; }
.page-subtitle { font-size: 1.2rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* Trust Badge */
.trust-badge {
    display: inline-flex; align-items: center; gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: rgba(0,245,255,0.1); border: 1px solid var(--neon-cyan);
    border-radius: var(--radius-full); font-size: 0.875rem; font-weight: 500;
    color: var(--neon-cyan); box-shadow: 0 0 15px var(--neon-cyan-glow);
}
.trust-badge::before { content: '◆'; color: var(--neon-cyan); animation: badgePulse 1.5s ease-in-out infinite; }
@keyframes badgePulse { 0%,100%{opacity:1;} 50%{opacity:0.5;} }

/* Card */
.card {
    background: var(--bg-glass); border-radius: var(--radius-lg);
    padding: var(--space-xl); border: 1px solid var(--border-subtle);
    backdrop-filter: blur(10px); transition: all var(--transition-base); position: relative;
}
.card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
    opacity: 0; transition: opacity var(--transition-base);
}
.card:hover { transform: translateY(-5px); border-color: var(--border-neon); box-shadow: 0 10px 40px rgba(0,0,0,0.4),0 0 30px var(--neon-cyan-glow); }
.card:hover::before { opacity: 1; }

/* Content Page Layout */
.content-page .content-body { max-width: 900px; margin: 0 auto; padding: 0 var(--space-lg) var(--space-3xl); }
.content-card {
    background: var(--bg-glass); border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg); padding: var(--space-2xl);
    backdrop-filter: blur(10px); margin-bottom: var(--space-xl);
    transition: all var(--transition-base); position: relative;
}
.content-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    opacity: 0; transition: opacity var(--transition-base);
}
.content-card:hover { border-color: var(--border-neon); box-shadow: 0 10px 40px rgba(0,0,0,0.3),0 0 20px var(--neon-cyan-glow); }
.content-card:hover::before { opacity: 1; }
.content-card h2 { font-family: var(--font-display); font-size: 1.6rem; font-weight: 700; color: var(--text-primary); margin-bottom: var(--space-lg); letter-spacing: 1px; }
.content-card h3 { font-family: var(--font-display); font-size: 1.2rem; font-weight: 600; color: var(--neon-cyan); margin-bottom: var(--space-md); }
.content-card p { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.8; margin-bottom: var(--space-md); }
.content-card ul { margin-bottom: var(--space-md); padding-left: 0; }
.content-card li { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.8; padding-left: 1.2em; position: relative; }
.content-card li::before { content: '▸'; position: absolute; left: 0; color: var(--neon-cyan); text-shadow: 0 0 10px var(--neon-cyan-glow); }
.content-card a { color: var(--neon-cyan); border-bottom: 1px solid transparent; transition: all var(--transition-fast); }
.content-card a:hover { color: var(--neon-pink); text-shadow: 0 0 10px var(--neon-pink-glow); border-bottom-color: var(--neon-pink); }

/* Info / Warning boxes */
.info-box { background: rgba(0,245,255,0.08); border: 1px solid rgba(0,245,255,0.2); border-radius: var(--radius-md); padding: var(--space-lg); margin: var(--space-lg) 0; font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }
.info-box strong { color: var(--neon-cyan); }
.warning-box { background: rgba(255,149,0,0.08); border: 1px solid rgba(255,149,0,0.2); border-radius: var(--radius-md); padding: var(--space-lg); margin: var(--space-lg) 0; font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }
.warning-box strong { color: #ff9500; }

/* Compare Table */
.compare-table { width: 100%; border-collapse: collapse; margin: var(--space-lg) 0; font-size: 0.9rem; }
.compare-table th { background: rgba(0,245,255,0.08); color: var(--neon-cyan); font-weight: 600; text-align: left; padding: var(--space-md); border: 1px solid var(--border-subtle); font-family: var(--font-display); letter-spacing: 0.5px; }
.compare-table td { padding: var(--space-md); border: 1px solid var(--border-subtle); color: var(--text-secondary); }
.compare-table tr:hover td { background: rgba(0,245,255,0.03); }

/* FAQ */
.faq-item { background: var(--bg-glass); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); margin-bottom: var(--space-md); overflow: hidden; backdrop-filter: blur(10px); transition: all var(--transition-base); }
.faq-item:hover { border-color: var(--border-neon); }
.faq-question { display: flex; align-items: center; justify-content: space-between; padding: var(--space-lg); cursor: pointer; transition: background var(--transition-fast); }
.faq-question:hover { background: rgba(0,245,255,0.05); }
.faq-question h4 { font-size: 1rem; font-weight: 600; color: var(--text-primary); }
.faq-icon { width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; transition: transform var(--transition-base); color: var(--neon-cyan); }
.faq-item.active .faq-icon { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height var(--transition-slow); }
.faq-item.active .faq-answer { max-height: 500px; }
.faq-answer p { padding: 0 var(--space-lg) var(--space-lg); color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }

/* Also use details/summary */
details { background: var(--bg-glass); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); margin-bottom: var(--space-md); backdrop-filter: blur(10px); transition: all var(--transition-base); }
details:hover { border-color: var(--border-neon); }
summary { padding: var(--space-lg); cursor: pointer; font-weight: 600; color: var(--text-primary); font-size: 1rem; list-style: none; display: flex; align-items: center; justify-content: space-between; }
summary::after { content: '+'; color: var(--neon-cyan); font-size: 1.2rem; transition: transform var(--transition-base); }
details[open] summary::after { transform: rotate(45deg); }
details p, details ul { padding: 0 var(--space-lg) var(--space-lg); color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }

/* Footer */
.footer { background: var(--bg-secondary); color: var(--text-primary); padding: var(--space-3xl) 0 var(--space-xl); border-top: 1px solid var(--border-subtle); position: relative; }
.footer::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--neon-cyan) 30%, var(--neon-purple) 70%, transparent 100%);
    opacity: 0.5;
}
.footer-grid { display: grid; grid-template-columns: 2fr repeat(3,1fr); gap: var(--space-2xl); margin-bottom: var(--space-2xl); }
.footer-brand { max-width: 300px; }
.footer-logo { display: flex; align-items: center; gap: var(--space-sm); font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; color: var(--text-primary); margin-bottom: var(--space-md); }
.footer-logo span:first-child { background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer-desc { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }
.footer-title { font-family: var(--font-display); font-size: 0.9rem; font-weight: 600; color: var(--neon-cyan); margin-bottom: var(--space-lg); text-transform: uppercase; letter-spacing: 1px; }
.footer-links { display: flex; flex-direction: column; gap: var(--space-sm); }
.footer-links a { font-size: 0.9rem; color: var(--text-secondary); transition: all var(--transition-fast); position: relative; padding-left: 0; }
.footer-links a::before { content: '>'; position: absolute; left: -15px; opacity: 0; color: var(--neon-cyan); transition: all var(--transition-fast); }
.footer-links a:hover { color: var(--neon-cyan); padding-left: 15px; text-shadow: 0 0 10px var(--neon-cyan-glow); }
.footer-links a:hover::before { opacity: 1; left: 0; }
.footer-bottom { display: flex; align-items: center; justify-content: center; padding: var(--space-xl) 0; border-top: 1px solid var(--border-subtle); }
.footer-copyright { font-size: 0.85rem; color: var(--text-muted); text-align: center; }

/* Gradient text */
.gradient-text { background: linear-gradient(135deg, var(--neon-cyan), var(--neon-pink), var(--neon-purple)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; background-size: 200% 200%; animation: gradientShift 3s ease infinite; }
@keyframes gradientShift { 0%{background-position:0% 50%;} 50%{background-position:100% 50%;} 100%{background-position:0% 50%;} }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Back to top */
.back-to-top {
    position: fixed; bottom: 40px; right: 40px; z-index: 999;
    width: 48px; height: 48px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    border: none; border-radius: 50%; cursor: pointer;
    color: var(--bg-primary); font-size: 1.2rem; font-weight: 700;
    box-shadow: 0 4px 20px var(--neon-cyan-glow);
    transition: all var(--transition-base);
    opacity: 0; pointer-events: none;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 8px 30px var(--neon-cyan-glow),0 0 50px var(--neon-purple-glow); }

/* Code */
code { font-family: 'JetBrains Mono', Consolas, monospace; background: rgba(0,245,255,0.1); color: var(--neon-cyan); padding: 2px 6px; border-radius: 4px; font-size: 0.85em; }


/* Card Icon */
.card-icon {
    width: 64px; height: 64px;
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.1), rgba(184, 41, 221, 0.1));
    border: 1px solid var(--border-neon); border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.75rem; margin-bottom: var(--space-lg);
    box-shadow: 0 0 20px var(--neon-cyan-glow);
}

.card-title {
    font-family: var(--font-display); font-size: 1.25rem; font-weight: 600;
    margin-bottom: var(--space-sm); color: var(--text-primary);
}

.card-desc { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

/* Neon Text Effects */
.neon-text {
    color: var(--neon-cyan);
    text-shadow: 0 0 5px var(--neon-cyan), 0 0 10px var(--neon-cyan),
        0 0 20px var(--neon-cyan-glow), 0 0 40px var(--neon-cyan-glow);
}

.neon-text-pink {
    color: var(--neon-pink);
    text-shadow: 0 0 5px var(--neon-pink), 0 0 10px var(--neon-pink),
        0 0 20px var(--neon-pink-glow), 0 0 40px var(--neon-pink-glow);
}

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

@keyframes neonFlicker {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.animate-fadeInUp { animation: fadeInUp 0.6s ease forwards; }
/* Responsive */
@media (max-width: 1024px) {
    .section { padding: var(--space-3xl) 0; }
    .footer-grid { grid-template-columns: repeat(2,1fr); }
    .page-title { font-size: 2.5rem; }
}
@media (max-width: 768px) {
    .nav-menu {
        position: fixed; top: 80px; left: 0; right: 0;
        background: rgba(10,10,15,0.98); flex-direction: column;
        padding: var(--space-xl); gap: var(--space-md);
        border-bottom: 1px solid var(--border-neon);
        transform: translateY(-150%); opacity: 0; pointer-events: none;
        transition: all var(--transition-base);
        box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    }
    .nav-menu.active { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .menu-toggle { display: flex; }
    .page-title { font-size: 2rem; }
    .footer-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
    .footer-bottom { flex-direction: column; gap: var(--space-md); text-align: center; }
    .content-card { padding: var(--space-xl); }
}
@media (max-width: 480px) {
    :root { --space-4xl: 4rem; --space-3xl: 3rem; }
    .container { padding: 0 var(--space-md); }
    .page-title { font-size: 1.75rem; }
    .btn-lg { padding: var(--space-md) var(--space-xl); font-size: 1rem; }
    .logo { font-size: 1.4rem; }
    .logo-icon { width: 38px; height: 38px; font-size: 1rem; }
    .content-card { padding: var(--space-lg); }
}