/* 大七 · Overlay OS — 与 frontend/index.html 一致 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #02050C;
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: #F0F4FA;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

.hyper-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: radial-gradient(circle at 80% 20%, rgba(0, 30, 45, 0.9), #010101 80%);
}

.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMDAiIGhlaWdodD0iMzAwIj48ZmlsdGVyIGlkPSJmIj48ZmVUdXJidWxlbmNlIHR5cGU9ImZyYWN0YWxOb2lzZSIgYmFzZUZyZXF1ZW5jeT0iLjQiIG51bU9jdGF2ZXM9IjMiLz48L2ZpbHRlcj48cmVjdCB3aWR0aD0iMTAwJSIgaGVpZ2h0PSIxMDAlIiBmaWx0ZXI9InVybCgjZikiIG9wYWNpdHk9IjAuMDMiLz48L3N2Zz4=');
    background-repeat: repeat;
    pointer-events: none;
    z-index: -1;
    opacity: 0.3;
}

.grid-cyber {
    position: fixed;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 255, 200, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 200, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: -1;
}

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: #0A0F18; }
::-webkit-scrollbar-thumb { background: #0CF0C0; border-radius: 10px; }

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

.navbar {
    padding: 28px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(12, 240, 192, 0.25);
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(2, 5, 12, 0.65);
}

.logo { font-size: 1.8rem; font-weight: 800; letter-spacing: -0.02em; }
.logo .brand {
    background: linear-gradient(130deg, #FFFFFF, #0CF0C0);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.logo .os-sub {
    font-size: 0.8rem;
    font-weight: 500;
    background: rgba(12,240,192,0.2);
    padding: 4px 12px;
    border-radius: 40px;
    margin-left: 12px;
}

.nav-links { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 28px; }
.nav-links a {
    color: #C0D4F0;
    margin-left: 0;
    text-decoration: none;
    font-weight: 500;
    transition: 0.2s;
    font-size: 0.95rem;
}
.nav-links a:first-child { margin-left: 0; }
.nav-links a:hover { color: #0CF0C0; text-shadow: 0 0 6px #0CF0C0; }
.nav-links a.active { color: #0CF0C0; }
.nav-links a.btn-outline { margin-left: 0; padding: 8px 22px; }

.btn-primary {
    background: linear-gradient(105deg, #0CF0C0, #02A88C);
    border: none;
    padding: 12px 32px;
    border-radius: 60px;
    font-weight: 700;
    color: #01060C;
    cursor: pointer;
    transition: all 0.25s;
    font-size: 0.9rem;
    letter-spacing: 0.3px;
    box-shadow: 0 5px 20px rgba(12,240,192,0.25);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(12,240,192,0.5); }

.btn-outline {
    background: transparent;
    border: 1.5px solid #0CF0C0;
    padding: 10px 28px;
    border-radius: 60px;
    font-weight: 600;
    color: #0CF0C0;
    transition: 0.2s;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
}
.btn-outline:hover { background: rgba(12,240,192,0.1); box-shadow: 0 0 12px rgba(12,240,192,0.3); }

.hero {
    padding: 100px 0 100px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 70px;
}
.hero-badge {
    background: rgba(12,240,192,0.12);
    backdrop-filter: blur(8px);
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 6px 18px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #0CF0C0;
    border: 0.5px solid rgba(12,240,192,0.4);
    margin-bottom: 24px;
}
.hero-content h1 {
    font-size: 4.2rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
}
.grad-text {
    background: linear-gradient(135deg, #FFFFFF, #0CF0C0, #50E3C2);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-sub {
    font-size: 1.2rem;
    color: #8EA3C2;
    max-width: 560px;
    margin: 28px 0 32px;
    line-height: 1.5;
    font-weight: 400;
}

.overlay-mock {
    flex: 1;
    min-width: 280px;
    background: rgba(8, 18, 28, 0.6);
    backdrop-filter: blur(16px);
    border-radius: 48px;
    border: 1px solid rgba(12,240,192,0.4);
    padding: 28px 24px;
    box-shadow: 0 25px 45px -20px black;
}
.window-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
    align-items: center;
}
.win-dot { width: 12px; height: 12px; border-radius: 50%; background: #FF5F56; }
.win-dot:nth-child(2) { background: #FFBD2E; }
.win-dot:nth-child(3) { background: #27C93F; }
.os-panel {
    background: #0A101C;
    border-radius: 32px;
    padding: 20px;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 700;
    text-align: center;
    margin: 80px 0 20px;
    letter-spacing: -0.01em;
}
.section-desc {
    text-align: center;
    color: #97A9C2;
    max-width: 680px;
    margin: 0 auto 60px;
    font-size: 1.05rem;
}

.grid-tech {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
    margin-bottom: 70px;
}
.tech-card {
    background: rgba(6, 14, 22, 0.7);
    backdrop-filter: blur(8px);
    border-radius: 40px;
    padding: 36px 28px;
    border: 1px solid rgba(12,240,192,0.2);
    transition: 0.25s ease;
}
.tech-card:hover { border-color: #0CF0C0; transform: translateY(-6px); }
.tech-icon { font-size: 2.5rem; color: #0CF0C0; margin-bottom: 28px; }
.tech-card h3 { font-size: 1.7rem; font-weight: 700; margin-bottom: 14px; }
.tech-card p { color: #B2C4DE; line-height: 1.5; font-weight: 400; }

.modular-flow {
    background: linear-gradient(145deg, #07121E, #01050C);
    border-radius: 60px;
    padding: 48px 40px;
    margin: 40px 0;
    border: 1px solid rgba(12,240,192,0.25);
}

.pricing-toggler {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 48px;
}
.toggle-btn {
    background: #0F1824;
    padding: 12px 32px;
    border-radius: 60px;
    font-weight: 700;
    cursor: pointer;
    transition: 0.2s;
    color: #B0C5E0;
}
.toggle-btn.active {
    background: #0CF0C0;
    color: #01060C;
    box-shadow: 0 0 12px #0CF0C0;
}
.price-flex {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
}
.price-node {
    background: rgba(10, 18, 30, 0.85);
    backdrop-filter: blur(12px);
    border-radius: 48px;
    width: 340px;
    max-width: 100%;
    padding: 40px 28px;
    border: 1px solid rgba(12,240,192,0.3);
}
.price-node h4 { font-size: 1.8rem; margin-bottom: 12px; }
.price-number { font-size: 3rem; font-weight: 800; margin: 20px 0; color: #0CF0C0; }

.agency-elite {
    background: radial-gradient(ellipse at 30% 20%, #0A182A, #010509);
    border-radius: 80px;
    padding: 70px 40px;
    text-align: center;
    margin: 80px 0;
    border: 1px solid #0CF0C044;
}

footer {
    padding: 56px 0 36px;
    border-top: 1px solid rgba(12,240,192,0.2);
    text-align: center;
    color: #6D85A6;
}

/* 内页 / 资源中心 */
.page-hero-mini { padding: 48px 0 32px; }
.page-hero-mini h1 { font-size: 2.4rem; font-weight: 800; }
.inner-prose {
    background: rgba(8, 18, 28, 0.6);
    border: 1px solid rgba(12,240,192,0.25);
    border-radius: 40px;
    padding: 36px 32px;
    margin-bottom: 60px;
    color: #B2C4DE;
    line-height: 1.75;
}
.inner-prose h2, .inner-prose h3 { color: #F0F4FA; margin-top: 1.2em; }
.inner-prose ul { padding-left: 1.2em; }

.table-os-wrap {
    overflow-x: auto;
    border-radius: 32px;
    border: 1px solid rgba(12,240,192,0.25);
    background: rgba(6, 14, 22, 0.7);
    margin-bottom: 60px;
}
table.table-os {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}
.table-os th, .table-os td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid rgba(12,240,192,0.12);
}
.table-os th { color: #8EA3C2; font-weight: 600; font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; }
.table-os tr:last-child td { border-bottom: none; }
.table-os a { color: #0CF0C0; }

.err404-wrap { text-align: center; padding: 100px 20px 80px; }
.err404-wrap h1 { font-size: 5rem; font-weight: 800; color: #0CF0C0; }

@media (max-width: 800px) {
    .hero-content h1 { font-size: 2.7rem; }
    .container { padding: 0 20px; }
    .nav-links a { margin-left: 20px; }
}