* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Segoe UI', 'Roboto', 'Microsoft YaHei', sans-serif;
    background: #04120c;
    color: #e2e8f0;
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

:root {
    --brand-blue: #3b82f6;
    --brand-cyan: #22d3ee;
    --leaf: #34d399;
    --glow: #67e8f9;
    --bg-card: rgba(6, 30, 22, 0.78);
    --text-muted: #94a3b8;
}

h1, h2, h3, h4 { color: #fff; font-weight: 700; }

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    background: rgba(4, 18, 12, 0.88);
    backdrop-filter: blur(2px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(52, 211, 153, 0.18);
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 800;
    color: #fff;
    text-shadow: 0 0 14px var(--leaf);
}
.nav-logo svg {
    width: 30px; height: 30px;
    fill: var(--glow);
    filter: drop-shadow(0 0 8px var(--brand-cyan));
}
.nav-links { display: flex; gap: 28px; align-items: center; font-size: 15px; font-weight: 500; }
.nav-links a { color: var(--text-muted); transition: .3s; }
.nav-links a:hover { color: #fff; text-shadow: 0 0 10px var(--leaf); }
.btn-download-nav {
    padding: 8px 22px !important;
    background: linear-gradient(135deg, #059669, var(--brand-cyan));
    color: #fff !important;
    border-radius: 50px;
    font-weight: 600;
    box-shadow: 0 0 16px rgba(52, 211, 153, .4);
}
.btn-download-nav:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(52, 211, 153, .55); }

.hero-wrapper {
    position: relative;
    min-height: 110vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 70px 5% 120px;
    overflow: hidden;
    background:
        radial-gradient(ellipse at 50% 80%, rgba(52, 211, 153, .18) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 0%, #0b2a1c 0%, #04120c 60%);
}

.tree-stage {
    position: absolute;
    top: 38%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(640px, 94vw);
    height: min(640px, 94vw);
    z-index: 0;
    pointer-events: none;
}

.tree-halo {
    position: absolute;
    inset: 8%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(103, 232, 249, .25), rgba(52, 211, 153, .12), transparent 70%);
    animation: haloPulse 5s ease-in-out infinite alternate;
    filter: blur(2px);
}

.tree-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 20px rgba(52, 211, 153, .45));
}

.fruit-sac {
    position: absolute;
    width: 54px;
    height: 68px;
    border-radius: 50% 50% 45% 45%;
    background: radial-gradient(circle at 35% 30%, rgba(186, 230, 253, .55), rgba(34, 211, 238, .35), rgba(14, 116, 144, .45));
    border: 1px solid rgba(103, 232, 249, .55);
    box-shadow:
        0 0 18px rgba(34, 211, 238, .55),
        inset 0 0 14px rgba(255, 255, 255, .2);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fruitBob 3.6s ease-in-out infinite alternate;
}
.fruit-sac svg {
    width: 28px;
    height: 28px;
    fill: #e0f2fe;
    filter: drop-shadow(0 0 6px #22d3ee);
}
.fruit-sac.f1 { top: 18%; left: 28%; animation-delay: 0s; }
.fruit-sac.f2 { top: 14%; left: 58%; animation-delay: .4s; }
.fruit-sac.f3 { top: 32%; left: 18%; animation-delay: .8s; }
.fruit-sac.f4 { top: 28%; left: 70%; animation-delay: 1.2s; }
.fruit-sac.f5 { top: 42%; left: 36%; animation-delay: .6s; }
.fruit-sac.f6 { top: 38%; left: 54%; animation-delay: 1s; }
.fruit-sac.f7 { top: 22%; left: 44%; animation-delay: 1.5s; }

@keyframes haloPulse {
    from { opacity: .55; transform: scale(.96); }
    to { opacity: 1; transform: scale(1.05); }
}
@keyframes fruitBob {
    from { transform: translateY(0) scale(1); }
    to { transform: translateY(-8px) scale(1.05); }
}

.hero-content {
    z-index: 10;
    max-width: 900px;
    text-align: center;
    position: relative;
    background: rgba(4, 18, 12, .62);
    padding: 48px 56px;
    border-radius: 28px;
    border: 1px solid rgba(52, 211, 153, .28);
    backdrop-filter: blur(2px);
    box-shadow: 0 28px 60px rgba(0,0,0,.85), inset 0 0 40px rgba(52, 211, 153, .08);
    margin-top: 220px;
}
.hero-title {
    font-size: 38px;
    margin-bottom: 18px;
    line-height: 1.3;
    background: linear-gradient(90deg, #fff, #a7f3d0, #67e8f9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero p {
    font-size: 18px;
    color: #cbd5e1;
    margin: 0 auto 32px;
    max-width: 720px;
}
.hero-buttons { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin-bottom: 28px; }

.btn-primary, .btn-outline, .btn-dl-card, .btn-more {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    transition: .3s;
}
.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, #059669, var(--brand-cyan));
    box-shadow: 0 10px 22px rgba(52, 211, 153, .35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 28px rgba(52, 211, 153, .5); }
.btn-outline {
    color: #fff;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(52, 211, 153, .4);
}
.btn-outline:hover {
    transform: translateY(-3px);
    background: rgba(52, 211, 153, .12);
    box-shadow: 0 10px 20px rgba(52, 211, 153, .25);
}

.hero-images {
    display: flex;
    justify-content: center;
    gap: 20px;
    align-items: flex-end;
    margin-top: 36px;
    z-index: 20;
}
.hero-images img {
    max-width: 28%;
    border-radius: 16px;
    border: 1px solid rgba(52, 211, 153, .25);
    box-shadow: 0 18px 40px rgba(0,0,0,.8);
    transition: .4s;
}
.hero-images img:nth-child(2) {
    transform: translateY(-20px);
    box-shadow: 0 28px 48px rgba(0,0,0,.9), 0 0 36px rgba(34, 211, 238, .28);
}
.hero-images img:hover {
    transform: translateY(-30px) scale(1.05);
    z-index: 5;
}

.features {
    padding: 110px 5%;
    background: #03140e;
    border-top: 1px solid rgba(255,255,255,.05);
}
.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 56px;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}
.feature-card {
    padding: 36px 28px;
    background: var(--bg-card);
    border-radius: 18px;
    border: 1px solid rgba(255,255,255,.06);
    transition: .3s;
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--leaf), transparent);
    opacity: 0;
    transition: .3s;
}
.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(52, 211, 153, .35);
    box-shadow: 0 16px 32px rgba(0,0,0,.7);
}
.feature-card:hover::before { opacity: 1; }
.feature-card h3 { font-size: 22px; margin-bottom: 12px; }
.feature-card p { color: var(--text-muted); font-size: 15px; }

.blog { padding: 100px 5%; background: #f0fdf4; color: #0f172a; }
.blog .section-title { color: #0f172a; }
.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
    max-width: 1100px;
    margin: 0 auto;
}
.blog-card {
    background: #fff;
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid rgba(0,0,0,.05);
    box-shadow: 0 10px 28px rgba(0,0,0,.06);
    transition: .3s;
}
.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 18px 36px rgba(52, 211, 153, .15);
}
.blog-card img { width: 100%; height: 250px; object-fit: cover; }
.blog-content { padding: 32px; }
.blog-date { display: inline-block; margin-bottom: 12px; font-size: 13px; color: #059669; font-weight: 600; }
.blog-content h3 { font-size: 22px; margin-bottom: 12px; color: #0f172a; }
.blog-content p { color: #64748b; font-size: 15px; }
.btn-more {
    display: block;
    width: 240px;
    margin: 56px auto 0;
    text-align: center;
    color: #059669;
    border: 2px solid #059669;
    background: #fff;
}
.btn-more:hover { background: #059669; color: #fff; }

.faq {
    padding: 90px 5%;
    max-width: 900px;
    margin: 40px auto 80px;
    background: #06281c;
    border-radius: 28px;
    border: 1px solid rgba(255,255,255,.05);
    box-shadow: 0 20px 48px rgba(0,0,0,.75);
}
.faq-item {
    background: rgba(255,255,255,.02);
    margin-bottom: 14px;
    padding: 24px 28px;
    border-radius: 14px;
    border-left: 4px solid var(--leaf);
}
.faq-item:hover { background: rgba(255,255,255,.05); }
.faq-question { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.faq-answer { color: var(--text-muted); font-size: 15px; line-height: 1.8; }

.footer {
    background: #020a07;
    padding: 80px 5% 30px;
    color: #94a3b8;
    border-top: 1px solid rgba(255,255,255,.05);
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 36px;
    max-width: 1200px;
    margin: 0 auto 48px;
}
.footer-col h4 { color: #fff; margin-bottom: 22px; font-size: 16px; }
.footer-col ul li { margin-bottom: 14px; }
.footer-col ul li a { color: #64748b; font-size: 14px; }
.footer-col ul li a:hover { color: var(--leaf); }
.footer-bottom {
    text-align: center;
    padding-top: 28px;
    border-top: 1px solid rgba(255,255,255,.05);
    font-size: 13px;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 28px;
    max-width: 1100px;
    margin: 56px auto;
    padding: 0 5%;
}
.download-card {
    padding: 38px 28px;
    text-align: center;
    background: var(--bg-card);
    border-radius: 22px;
    border: 1px solid rgba(255,255,255,.06);
    transition: .3s;
}
.download-card:hover {
    transform: translateY(-8px);
    border-color: rgba(52, 211, 153, .4);
    box-shadow: 0 16px 32px rgba(0,0,0,.7), 0 0 28px rgba(34, 211, 238, .15);
}
.download-card h3 { font-size: 22px; margin-bottom: 12px; }
.download-card p { color: var(--text-muted); font-size: 14px; margin-bottom: 26px; }
.btn-dl-card {
    color: #fff;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.2);
}
.btn-dl-card:hover {
    background: linear-gradient(135deg, #059669, var(--brand-cyan));
    border-color: transparent;
}

.page-header {
    padding: 100px 5% 80px;
    text-align: center;
    background: #06281c;
    position: relative;
    border-bottom: 1px solid rgba(255,255,255,.05);
}
.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(52, 211, 153, .16), transparent 55%);
    pointer-events: none;
}
.page-header-content { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
.page-header h1 { font-size: 40px; margin-bottom: 16px; }
.page-header p { font-size: 18px; color: var(--text-muted); }

@media (max-width: 900px) {
    .features-grid, .blog-grid, .footer-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 28px; }
    .hero-content { margin-top: 140px; padding: 28px 22px; }
    .nav-links { gap: 12px; font-size: 13px; flex-wrap: wrap; justify-content: flex-end; }
}

/* === perf: reduce motion & lower GPU cost === */
.feature-card,
.blog-card,
.hero-content,
.glass-panel,
.pearl-card {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}
.navbar {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}

/* perf: limit decorative infinite layers on mid/low-end devices */
@media (max-width: 768px) {
    .bubble:nth-child(n+3),
    .tiny-plane:nth-child(n+3),
    .bg-shard:nth-child(n+4),
    .orb:nth-child(n+2) {
        display: none !important;
    }
}