.section { max-width: 1200px; margin: 0 auto; padding: 88px 32px; }
        .section-head { text-align: center; margin-bottom: 56px; } .section-tag { display: inline-block; background: var(--accent-light); color: var(--accent); padding: 4px 14px; border-radius: 20px; font-size: 12px; font-weight: 600; margin-bottom: 14px; letter-spacing: 0.5px; }
        .section-head h2 { font-size: 36px; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.5px; } .section-head p { font-size: 16px; color: var(--text-sub); max-width: 480px; margin: 0 auto; }

        .feat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 20px; }
        .feat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: all .3s; }
        .feat-card:hover { border-color: var(--accent); box-shadow: var(--shadow-lg); transform: translateY(-3px); }
        .feat-icon { width: 46px; height: 46px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 21px; margin-bottom: 18px; } .feat-icon.blue { background: var(--accent-light); } .feat-icon.purple { background: #EDE9FE; } .feat-icon.green { background: var(--green-light); } .feat-icon.orange { background: var(--orange-light); } .feat-icon.red { background: var(--red-light); }
        .feat-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; } .feat-card p { font-size: 14px; color: var(--text-sub); line-height: 1.6; } .feat-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 14px; } .feat-tag { font-size: 11px; padding: 3px 10px; border-radius: 6px; background: var(--bg); color: var(--text-dim); font-weight: 500; }

        .flow-section { background: linear-gradient(180deg, #E0ECFF, #D6E6FF, #E0ECFF); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
        .flow-inner { max-width: 1200px; margin: 0 auto; padding: 88px 32px; } .flow-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; } .flow-step { text-align: center; padding: 36px 24px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); position: relative; transition: all .3s; } .flow-step:hover { border-color: var(--accent); box-shadow: var(--shadow-md); }
        .flow-num { width: 52px; height: 52px; background: var(--accent); color: #fff; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 22px; font-weight: 800; margin: 0 auto 18px; } .flow-step h4 { font-size: 17px; font-weight: 700; margin-bottom: 8px; } .flow-step p { font-size: 14px; color: var(--text-sub); line-height: 1.6; } .flow-arrow { position: absolute; right: -16px; top: 50%; color: var(--text-dim); font-size: 18px; }

        .dev-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(145px, 1fr)); gap: 14px; }
        .dev-item { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 22px 14px; text-align: center; transition: all .3s; } .dev-item:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow-md); } .dev-item .icon { font-size: 30px; margin-bottom: 8px; } .dev-item h4 { font-size: 13px; font-weight: 600; }

        .tech-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 18px; }
        .tech-item { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 22px; display: flex; gap: 14px; align-items: flex-start; transition: all .3s; } .tech-item:hover { border-color: rgba(37,99,235,0.3); }
        .tech-icon { width: 38px; height: 38px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 17px; flex-shrink: 0; } .tech-icon.blue { background: var(--accent-light); } .tech-icon.green { background: var(--green-light); } .tech-icon.orange { background: var(--orange-light); } .tech-icon.purple { background: #EDE9FE; }
        .tech-item h4 { font-size: 14px; font-weight: 700; margin-bottom: 3px; } .tech-item p { font-size: 13px; color: var(--text-sub); line-height: 1.5; }

        .cta-section { background: linear-gradient(135deg, #3B82F6 0%, #6366F1 50%, #7C3AED 100%); padding: 100px 32px; text-align: center; color: #fff; }
        .cta-section h2 { font-size: 40px; font-weight: 900; margin-bottom: 14px; letter-spacing: -0.5px; } .cta-section p { font-size: 17px; opacity: .9; margin-bottom: 32px; }
        .btn-white { background: #fff; color: var(--accent); padding: 15px 36px; border-radius: 10px; font-size: 16px; font-weight: 700; border: none; cursor: pointer; transition: all .25s; display: inline-flex; align-items: center; gap: 8px; } .btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,0,0,0.15); }

        .footer { background: #111827; color: rgba(255,255,255,0.5); padding: 40px 32px 20px; } .footer-inner { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
        .footer-brand { display: flex; align-items: center; gap: 10px; font-size: 16px; font-weight: 700; color: #fff; } .footer-links { display: flex; gap: 24px; list-style: none; } .footer-links a { color: rgba(255,255,255,0.5); font-size: 13px; transition: color .2s; } .footer-links a:hover { color: #fff; }
        .footer-copy { width: 100%; text-align: center; font-size: 12px; margin-top: 20px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.08); }

        .dl-cards { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; max-width: 1100px; margin: 0 auto; }
        .dl-card { flex: 1; min-width: 260px; max-width: 340px; background: #FFFFFF; border: 1px solid #E0E3EB; border-radius: 16px; overflow: hidden; transition: all .3s; } .dl-card:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(55,66,250,0.12); border-color: rgba(55,66,250,0.2); }
        .dl-card-top { height: 4px; } .dl-card-tool { background: linear-gradient(90deg, #fbbf24, #f97316); } .dl-card-pink { background: linear-gradient(90deg, #f472b6, #a78bfa); } .dl-card-blue { background: linear-gradient(90deg, #60a5fa, #34d399); }
        .dl-card-body { padding: 28px 24px; text-align: center; } .dl-icon { font-size: 36px; margin-bottom: 14px; } .dl-card h3 { font-size: 1.15rem; font-weight: 700; color: #263238; margin-bottom: 4px; } .dl-sub { font-size: .85rem; color: #607D8B; margin-bottom: 18px; }
        .dl-specs { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; } .dl-spec { display: flex; justify-content: space-between; align-items: center; padding: 8px 14px; background: #F5F6FA; border-radius: 10px; font-size: .85rem; } .dl-spec span:first-child { color: #607D8B; } .dl-spec span:last-child { color: #263238; font-weight: 600; }
        .dl-btn { display: inline-flex; align-items: center; gap: 6px; padding: 12px 32px; border-radius: 12px; font-size: .95rem; font-weight: 600; color: #fff; text-decoration: none; transition: all .3s; } .dl-btn:hover { transform: scale(1.04); }
        .dl-btn-tool { background: linear-gradient(135deg, #fbbf24, #f97316); box-shadow: 0 4px 16px rgba(249,115,22,0.3); } .dl-btn-tool:hover { box-shadow: 0 6px 24px rgba(249,115,22,0.5); }
        .dl-btn-pink { background: linear-gradient(135deg, #f472b6, #a78bfa); box-shadow: 0 4px 16px rgba(244,114,182,0.3); } .dl-btn-pink:hover { box-shadow: 0 6px 24px rgba(244,114,182,0.5); }
        .dl-btn-blue { background: linear-gradient(135deg, #60a5fa, #34d399); box-shadow: 0 4px 16px rgba(96,165,250,0.3); } .dl-btn-blue:hover { box-shadow: 0 6px 24px rgba(96,165,250,0.5); }

        .changelog-card { max-width: 720px; margin: 0 auto; background: #FFFFFF; border: 1px solid #E0E3EB; border-radius: 16px; padding: 28px 32px; position: relative; overflow: hidden; }
        .changelog-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, #a78bfa, #3742fa, #34d399); }
        .ver-item { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid #F0F2F5; } .ver-item:last-child { border-bottom: none; padding-bottom: 0; } .ver-item:first-child { padding-top: 0; }
        .ver-badge { flex-shrink: 0; min-width: 52px; padding: 5px 12px; border-radius: 8px; font-size: .78rem; font-weight: 700; text-align: center; background: #F5F6FA; color: #607D8B; border: 1px solid #E0E3EB; height: fit-content; } .ver-latest { background: rgba(55,66,250,0.1); color: #3742fa; border-color: rgba(55,66,250,0.2); } .ver-upcoming { background: rgba(255,152,0,0.1); color: #FF9800; border-color: rgba(255,152,0,0.25); }
        .ver-content { flex: 1; } .ver-content h4 { font-size: .95rem; font-weight: 600; color: #263238; margin-bottom: 6px; display: flex; align-items: center; gap: 8px; } .latest-tag { font-size: .65rem; padding: 2px 8px; border-radius: 6px; background: linear-gradient(135deg, #3742fa, #5C6BC0); color: #fff; font-weight: 600; } .upcoming-tag { font-size: .65rem; padding: 2px 8px; border-radius: 6px; background: linear-gradient(135deg, #FF9800, #FFB74D); color: #fff; font-weight: 600; }
        .ver-content ul { list-style: none; padding: 0; } .ver-content ul li { font-size: .85rem; color: #607D8B; padding: 2px 0 2px 16px; position: relative; } .ver-content ul li::before { content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%); width: 5px; height: 5px; border-radius: 50%; background: rgba(55,66,250,0.4); } .ver-item:first-child .ver-content ul li::before { background: #3742fa; width: 6px; height: 6px; }

        .reveal { opacity: 0; transform: translateY(32px); transition: opacity .6s ease, transform .6s ease; } .reveal.show { opacity: 1; transform: translateY(0); }

        @media (max-width: 768px) {
            .hero h1 { font-size: 36px; } .nav-links { display: none; } .feat-grid { grid-template-columns: 1fr; } .flow-steps { grid-template-columns: 1fr; } .flow-arrow { display: none; } .stats { gap: 24px; } .stat-val { font-size: 28px; } .ss-side { width: 130px; } .ss-body { height: 280px; } .dl-cards { flex-direction: column; align-items: center; } .dl-card { max-width: 400px; width: 100%; } .changelog-card { padding: 20px; }
        }

/* Nav Language Selector */
.nav-lang-item { position: relative; list-style: none; }
.nav-lang-toggle { display: flex; align-items: center; gap: 5px; color: var(--text-sub); font-size: 14px; font-weight: 500; cursor: pointer; padding: 6px 12px; border-radius: 8px; transition: all .2s; border: 1.5px solid var(--border); background: rgba(255,255,255,0.6); }
.nav-lang-toggle:hover { color: var(--accent); border-color: var(--accent-light); background: var(--accent-light); }
.nav-lang-toggle svg { transition: transform .2s; }
.nav-lang-item.open .nav-lang-toggle svg { transform: rotate(180deg); }
.nav-lang-dropdown { display: none; position: absolute; top: calc(100% + 8px); left: 50%; transform: translateX(-50%); background: #fff; border: 1px solid var(--border); border-radius: 10px; box-shadow: 0 8px 32px rgba(0,0,0,0.1); min-width: 180px; z-index: 2000; padding: 6px 0; animation: langFadeIn .15s ease; }
.nav-lang-item.open .nav-lang-dropdown { display: block; }
@keyframes langFadeIn { from { opacity: 0; transform: translateX(-50%) translateY(-6px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }
.nav-lang-opt { padding: 9px 16px; font-size: 13px; cursor: pointer; display: flex; align-items: center; gap: 8px; transition: background .15s; color: var(--text); }
.nav-lang-opt:hover { background: var(--accent-light); color: var(--accent); }