* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Microsoft YaHei', sans-serif; min-height: 100vh; color: #fff; background: linear-gradient(135deg, #1e3a5f 0%, #2d5a87 50%, #1e3a5f 100%); overflow-x: hidden; }

.bg-effects { position: fixed; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; overflow: hidden; }

.zip-block { position: absolute; opacity: 0.2; animation: blockFloat 4s ease-in-out infinite; }
.zb1 { top: 15%; left: 10%; animation-delay: 0s; }
.zb2 { top: 25%; right: 15%; animation-delay: 1s; }
.zb3 { bottom: 30%; left: 20%; animation-delay: 2s; }
.block-content { font-size: 48px; }
.zip-line { width: 60px; height: 4px; background: rgba(255,255,255,0.2); margin-top: 8px; border-radius: 2px; animation: lineFlash 2s ease-in-out infinite; }
@keyframes blockFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(5deg); }
}
@keyframes lineFlash {
    0%, 100% { opacity: 0.2; width: 60px; }
    50% { opacity: 0.5; width: 80px; }
}

.compression-wave { position: absolute; width: 200px; height: 200px; border: 2px solid rgba(255,152,0,0.15); border-radius: 8px; animation: compressWave 3s ease-out infinite; transform: rotate(45deg); }
.cw1 { top: 30%; right: 20%; }
.cw2 { bottom: 20%; left: 10%; animation-delay: 1.5s; }
@keyframes compressWave {
    0% { transform: rotate(45deg) scale(0.5); opacity: 0.8; }
    100% { transform: rotate(45deg) scale(2); opacity: 0; }
}

.main-header { background: rgba(30,58,95,0.9); backdrop-filter: blur(12px); border-bottom: 1px solid rgba(255,152,0,0.2); position: fixed; top: 0; left: 0; right: 0; z-index: 100; }
.header-content { max-width: 1200px; margin: 0 auto; padding: 15px 20px; display: flex; justify-content: space-between; align-items: center; }
.site-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; color: #fff; }
.logo-icon { position: relative; font-size: 28px; }
.zip-icon { display: block; animation: iconPulse 2s ease-in-out infinite; }
@keyframes iconPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}
.zip-lines { position: absolute; top: -5px; right: -10px; display: flex; flex-direction: column; gap: 3px; }
.zl { width: 25px; height: 3px; background: #ff9800; border-radius: 2px; animation: lineMove 1.5s ease-in-out infinite; }
.zl:nth-child(2) { width: 20px; animation-delay: 0.2s; }
.zl:nth-child(3) { width: 15px; animation-delay: 0.4s; }
@keyframes lineMove {
    0%, 100% { transform: translateX(0); opacity: 1; }
    50% { transform: translateX(5px); opacity: 0.5; }
}
.logo-text { font-size: 20px; font-weight: bold; }
.main-nav { display: flex; gap: 25px; }
.nav-link { color: rgba(255,255,255,0.85); text-decoration: none; font-size: 15px; padding: 8px 16px; border-radius: 20px; transition: all 0.3s; }
.nav-link:hover { background: rgba(255,152,0,0.15); color: #ff9800; }
.nav-link.active { background: linear-gradient(135deg, #ff9800, #ffc107); color: #1e3a5f; font-weight: 600; }

.main-content { position: relative; z-index: 1; }

.hero-section { display: flex; align-items: center; justify-content: center; min-height: 70vh; padding: 120px 20px 60px; gap: 80px; flex-wrap: wrap; }
.hero-visual { flex: 1; display: flex; justify-content: center; align-items: center; min-width: 300px; }
.compression-demo { position: relative; width: 250px; height: 300px; }
.big-file { position: absolute; top: 0; left: 50%; transform: translateX(-50%); font-size: 80px; animation: fileFloat 3s ease-in-out infinite; }
@keyframes fileFloat {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}
.compress-arrow { position: absolute; top: 100px; left: 50%; transform: translateX(-50%); width: 60px; }
.arrow-body { width: 4px; height: 40px; background: linear-gradient(to bottom, #ff9800, #ffc107); margin: 0 auto; animation: arrowPulse 1s ease-in-out infinite; }
.arrow-head { text-align: center; font-size: 20px; color: #ff9800; animation: arrowBounce 1s ease-in-out infinite; }
@keyframes arrowPulse {
    0%, 100% { height: 40px; opacity: 1; }
    50% { height: 50px; opacity: 0.7; }
}
@keyframes arrowBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(5px); }
}
.compressed-result { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); text-align: center; }
.result-icon { font-size: 70px; animation: resultPulse 2s ease-in-out infinite; }
@keyframes resultPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}
.result-lines { display: flex; gap: 5px; justify-content: center; margin-top: 5px; }
.rl { width: 30px; height: 4px; background: rgba(255,255,255,0.3); border-radius: 2px; }
.ratio-badge { position: absolute; top: 50%; right: 0; transform: translateY(-50%); background: linear-gradient(135deg, #ff9800, #ffc107); color: #1e3a5f; padding: 8px 15px; border-radius: 20px; font-size: 18px; font-weight: bold; animation: badgePulse 1.5s ease-in-out infinite; }
@keyframes badgePulse {
    0%, 100% { transform: translateY(-50%) scale(1); }
    50% { transform: translateY(-50%) scale(1.1); }
}

.hero-text { flex: 1; min-width: 300px; text-align: left; }
.hero-title { font-size: 52px; font-weight: bold; margin-bottom: 15px; color: #fff; }
.hero-desc { font-size: 18px; opacity: 0.85; margin-bottom: 35px; line-height: 1.8; }

.btn-primary { display: inline-flex; align-items: center; gap: 10px; padding: 16px 40px; background: linear-gradient(135deg, #ff9800, #ffc107); color: #1e3a5f; text-decoration: none; border-radius: 50px; font-size: 18px; font-weight: bold; transition: all 0.3s; box-shadow: 0 8px 25px rgba(255,152,0,0.3); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 35px rgba(255,152,0,0.5); }
.btn-secondary { display: inline-block; padding: 14px 35px; background: transparent; color: #ff9800; text-decoration: none; border-radius: 50px; font-size: 16px; border: 2px solid rgba(255,152,0,0.5); transition: all 0.3s; }
.btn-secondary:hover { background: rgba(255,152,0,0.15); border-color: #ff9800; }
.btn-large { padding: 20px 55px; font-size: 20px; }
.btn-back { display: inline-block; margin-top: 20px; color: rgba(255,255,255,0.6); text-decoration: none; font-size: 14px; transition: color 0.3s; }
.btn-back:hover { color: #ff9800; }

.stats-section { padding: 50px 20px; background: rgba(0,0,0,0.1); }
.stats-grid { max-width: 900px; margin: 0 auto; display: flex; justify-content: center; gap: 70px; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-icon { font-size: 36px; margin-bottom: 10px; }
.stat-number { font-size: 44px; font-weight: bold; color: #ff9800; }
.stat-label { opacity: 0.85; margin-top: 8px; font-size: 15px; }

.features-section { padding: 60px 20px; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-title { font-size: 34px; font-weight: bold; }
.features-grid { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 25px; }
.feature-card { background: rgba(255,255,255,0.06); border-radius: 18px; padding: 30px; text-align: center; border: 1px solid rgba(255,152,0,0.15); transition: all 0.3s; }
.feature-card:hover { transform: translateY(-8px); background: rgba(255,152,0,0.1); box-shadow: 0 15px 40px rgba(0,0,0,0.2); }
.feature-icon { font-size: 44px; margin-bottom: 15px; }
.feature-card h3 { font-size: 18px; margin-bottom: 10px; }
.feature-card p { font-size: 14px; opacity: 0.85; line-height: 1.6; }

.download-section { display: flex; align-items: center; justify-content: center; min-height: 80vh; padding: 100px 20px 60px; }
.download-card { background: rgba(255,255,255,0.06); border-radius: 28px; padding: 50px; text-align: center; border: 1px solid rgba(255,152,0,0.2); max-width: 500px; width: 100%; backdrop-filter: blur(15px); }
.download-visual { position: relative; width: 180px; height: 180px; margin: 0 auto 30px; }
.package-icon { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); font-size: 80px; animation: iconBounce 2s ease-in-out infinite; }
@keyframes iconBounce {
    0%, 100% { transform: translate(-50%,-50%) scale(1); }
    50% { transform: translate(-50%,-50%) scale(1.08); }
}
.pulse-ring { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); border: 2px solid rgba(255,152,0,0.25); border-radius: 8px; animation: ringPulse 2s ease-in-out infinite; }
.pr1 { width: 120px; height: 120px; }
.pr2 { width: 145px; height: 145px; animation-delay: 0.4s; }
.pr3 { width: 170px; height: 170px; animation-delay: 0.8s; }
@keyframes ringPulse {
    0%, 100% { transform: translate(-50%,-50%) scale(1); opacity: 0.7; }
    50% { transform: translate(-50%,-50%) scale(1.15); opacity: 0.2; }
}
.download-title { font-size: 34px; margin-bottom: 8px; }
.download-subtitle { opacity: 0.85; margin-bottom: 20px; font-size: 16px; }
.version-badge { display: inline-block; background: linear-gradient(135deg, #ff9800, #ffc107); color: #1e3a5f; padding: 8px 24px; border-radius: 20px; font-size: 14px; font-weight: 600; margin-bottom: 25px; }
.download-info { background: rgba(255,152,0,0.06); border-radius: 14px; padding: 20px; margin-bottom: 30px; text-align: left; }
.info-item { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.08); }
.info-item:last-child { border-bottom: none; }
.info-label { opacity: 0.7; }
.info-value { color: #ff9800; font-weight: 500; }

.error-section { display: flex; align-items: center; justify-content: center; min-height: 75vh; padding: 100px 20px 60px; }
.error-card { text-align: center; }
.error-visual { position: relative; width: 220px; height: 220px; margin: 0 auto 30px; }
.broken-box { font-size: 100px; opacity: 0.4; animation: boxShake 2s ease-in-out infinite; }
@keyframes boxShake {
    0%, 100% { transform: rotate(0deg); opacity: 0.4; }
    25% { transform: rotate(-5deg); opacity: 0.5; }
    75% { transform: rotate(5deg); opacity: 0.3; }
}
.crack-lines { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); }
.crack { position: absolute; background: rgba(255,152,0,0.4); transform-origin: center; }
.cr1 { width: 30px; height: 3px; top: -15px; left: -20px; transform: rotate(30deg); }
.cr2 { width: 25px; height: 3px; top: 0; right: -25px; transform: rotate(-45deg); }
.cr3 { width: 20px; height: 3px; bottom: -10px; left: -15px; transform: rotate(60deg); }
.parts { position: absolute; top: 0; left: 0; right: 0; bottom: 0; }
.part { position: absolute; font-size: 28px; animation: partFloat 3s ease-in-out infinite; }
.p1 { top: 10%; left: 5%; animation-delay: 0s; }
.p2 { top: 15%; right: 10%; animation-delay: 0.5s; }
.p3 { bottom: 20%; left: 15%; animation-delay: 1s; }
@keyframes partFloat {
    0%, 100% { transform: translate(0,0) rotate(0deg); opacity: 0.6; }
    50% { transform: translate(5px,-5px) rotate(10deg); opacity: 0.9; }
}
.error-code { font-size: 130px; font-weight: bold; opacity: 0.12; line-height: 1; color: #ff9800; }
.error-title { font-size: 30px; margin-bottom: 10px; margin-top: -20px; }
.error-desc { opacity: 0.8; margin-bottom: 30px; font-size: 16px; }
.error-actions { display: flex; gap: 15px; justify-content: center; }

.main-footer { background: rgba(30,58,95,0.95); padding: 30px 20px; text-align: center; border-top: 1px solid rgba(255,152,0,0.15); }
.footer-content { max-width: 1200px; margin: 0 auto; }
.main-footer p { opacity: 0.7; font-size: 14px; }

@media (max-width: 768px) {
    .header-content { flex-direction: column; gap: 15px; }
    .hero-section { flex-direction: column; text-align: center; }
    .hero-text { text-align: center; }
    .hero-title { font-size: 38px; }
    .stats-grid { gap: 40px; }
    .stat-number { font-size: 36px; }
    .features-grid { grid-template-columns: 1fr; }
    .download-card { padding: 35px 25px; }
    .error-actions { flex-direction: column; align-items: center; }
    .error-code { font-size: 100px; }
}