/* Reset & Variables */
:root {
    --bg-dark: #050505;
    --bg-panel: #111111;
    --text-primary: #f8f8f2;
    --text-secondary: #a1a1aa;
    --neon-pink: #ff2a6d;
    --neon-cyan: #05d9e8;
    --neon-yellow: #ffb800;
    --border-glow: rgba(5, 217, 232, 0.3);
    --font-cyber: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-cyber);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        linear-gradient(rgba(5, 217, 232, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(5, 217, 232, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    background-position: center center;
}

a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4 {
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 800;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
    text-shadow: 2px 2px 0px var(--neon-pink), -2px -2px 0px var(--neon-cyan);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    z-index: 1;
    border: none;
    background: transparent;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1;
    transition: all 0.3s ease;
}

.btn-cyber {
    color: var(--bg-dark);
}

.btn-cyber::before {
    background: var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-cyan);
}

.btn-cyber:hover::before {
    background: var(--neon-pink);
    box-shadow: 0 0 20px var(--neon-pink);
}

.btn-outline {
    color: var(--neon-cyan);
    border: 2px solid var(--neon-cyan);
}

.btn-outline:hover {
    background: rgba(5, 217, 232, 0.1);
    box-shadow: inset 0 0 10px var(--neon-cyan);
}

/* Header */
.cyber-header {
    position: fixed;
    top: 0; width: 100%;
    background: rgba(5, 5, 5, 0.9);
    border-bottom: 1px solid var(--neon-cyan);
    box-shadow: 0 0 10px var(--border-glow);
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--text-primary);
    text-shadow: 0 0 5px var(--neon-cyan);
    letter-spacing: 3px;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-menu a {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
}

.nav-menu a:hover {
    color: var(--neon-pink);
    text-shadow: 0 0 8px var(--neon-pink);
}

.nav-tools {
    display: flex;
    align-items: center;
    gap: 20px;
}

.lang {
    color: var(--text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
}

/* Hero */
.hero-sec {
    padding: 180px 0 100px;
    position: relative;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 20px;
    color: transparent;
    -webkit-text-stroke: 1px var(--text-primary);
    position: relative;
}

.hero-title::before {
    content: '全球互联，一触即达';
    position: absolute;
    left: 0; top: 0; width: 100%; height: 100%;
    color: var(--neon-cyan);
    filter: blur(8px);
    z-index: -1;
    opacity: 0.7;
}

.hero-desc {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* Trust */
.trust-sec {
    border-top: 1px dashed var(--text-secondary);
    border-bottom: 1px dashed var(--text-secondary);
    padding: 20px 0;
    background: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(255,255,255,0.02) 10px, rgba(255,255,255,0.02) 20px);
}

.trust-flex {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}

.trust-item {
    font-family: monospace;
    color: var(--neon-yellow);
    font-size: 0.9rem;
}

/* Stats */
.stats-sec { padding: 80px 0; }
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.stat-box {
    background: var(--bg-panel);
    border: 1px solid #333;
    padding: 30px 20px;
    text-align: center;
    position: relative;
}

.stat-box::after {
    content: '';
    position: absolute;
    bottom: 0; right: 0;
    width: 20px; height: 20px;
    border-bottom: 2px solid var(--neon-pink);
    border-right: 2px solid var(--neon-pink);
}

.stat-num {
    font-size: 2.5rem;
    color: var(--neon-cyan);
    font-weight: 900;
    margin-bottom: 10px;
    font-family: monospace;
}

.stat-text {
    color: var(--text-secondary);
    font-size: 0.8rem;
    letter-spacing: 1px;
}

/* Features */
.feat-sec { padding: 80px 0; }
.feat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feat-card {
    background: rgba(17, 17, 17, 0.8);
    border: 1px solid #222;
    padding: 40px 30px;
    position: relative;
    transition: all 0.3s;
}

.feat-card:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px rgba(5, 217, 232, 0.1);
    transform: translateY(-5px);
}

.feat-card h3 {
    color: var(--neon-pink);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.feat-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.feat-img {
    width: 100%;
    border: 1px solid #333;
    filter: grayscale(50%) contrast(120%);
    transition: filter 0.3s;
}

.feat-card:hover .feat-img {
    filter: none;
}

/* Nodes */
.node-sec { padding: 80px 0; background: #0a0a0a; border-top: 1px solid #222; border-bottom: 1px solid #222; }
.node-wrap {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.node-item {
    flex: 1;
    min-width: 150px;
    background: var(--bg-dark);
    border: 1px solid var(--neon-cyan);
    padding: 20px;
    text-align: center;
    position: relative;
}

.node-item::before {
    content: '';
    position: absolute;
    top: -5px; left: -5px;
    width: 10px; height: 10px;
    background: var(--neon-pink);
}

.n-city { font-size: 1.2rem; font-weight: bold; margin-bottom: 5px; }
.n-speed { color: var(--neon-cyan); font-family: monospace; font-size: 0.9rem; }

/* Testimonials */
.testi-sec { padding: 80px 0; }
.testi-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testi-box {
    background: var(--bg-panel);
    padding: 30px;
    border-left: 3px solid var(--neon-yellow);
}

.t-stars { color: var(--neon-yellow); margin-bottom: 15px; letter-spacing: 2px; }
.t-txt { color: var(--text-secondary); font-style: italic; margin-bottom: 20px; }
.t-user { display: flex; align-items: center; gap: 15px; }
.t-ava {
    width: 40px; height: 40px;
    background: #222;
    display: flex; align-items: center; justify-content: center;
    font-weight: bold; color: var(--neon-cyan);
    border: 1px solid #444;
}

/* Pricing */
.price-sec { padding: 80px 0; }
.price-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    align-items: center;
}

.p-card {
    background: var(--bg-panel);
    border: 1px solid #333;
    padding: 40px 30px;
    text-align: center;
}

.p-card.pro {
    border-color: var(--neon-pink);
    box-shadow: 0 0 30px rgba(255, 42, 109, 0.2);
    transform: scale(1.05);
    position: relative;
}

.p-badge {
    position: absolute;
    top: -15px; left: 50%; transform: translateX(-50%);
    background: var(--neon-pink);
    color: #fff;
    padding: 5px 15px;
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
}

.p-title { font-size: 1.5rem; margin-bottom: 15px; color: var(--text-primary); }
.p-price { font-size: 3rem; color: var(--neon-cyan); font-weight: 900; margin-bottom: 20px; }
.p-price span { font-size: 1rem; color: var(--text-secondary); }
.p-list { text-align: left; margin-bottom: 30px; }
.p-list li {
    padding: 10px 0;
    border-bottom: 1px solid #222;
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.p-list li::before { content: '>'; color: var(--neon-pink); margin-right: 10px; font-weight: bold; }

/* FAQ */
.faq-sec { padding: 80px 0; background: #0a0a0a; }
.faq-wrap { max-width: 800px; margin: 0 auto; }
.faq-item {
    margin-bottom: 20px;
    border: 1px solid #333;
    background: var(--bg-dark);
}
.faq-q {
    padding: 20px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    color: var(--neon-cyan);
}
.faq-a {
    padding: 0 20px 20px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Footer */
.cyber-footer {
    border-top: 2px solid var(--neon-cyan);
    padding: 60px 0 20px;
    background: #000;
}
.f-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.f-brand .logo { font-size: 1.5rem; margin-bottom: 15px; display: block; }
.f-brand p { color: var(--text-secondary); font-size: 0.9rem; }
.f-links h4 { color: #fff; margin-bottom: 20px; font-size: 1rem; }
.f-links li { margin-bottom: 10px; }
.f-links a { color: var(--text-secondary); font-size: 0.9rem; }
.f-links a:hover { color: var(--neon-pink); padding-left: 5px; }
.f-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #222;
    color: #555;
    font-size: 0.8rem;
}

/* Download Page */
.dl-hero { padding: 150px 0 80px; text-align: center; }
.dl-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 800px;
    margin: 0 auto 100px;
}
.dl-box {
    background: var(--bg-panel);
    border: 1px solid #333;
    padding: 40px;
    text-align: center;
    transition: all 0.3s;
}
.dl-box:hover { border-color: var(--neon-cyan); }
.dl-icon { font-size: 3rem; margin-bottom: 20px; }
.dl-box h3 { margin-bottom: 10px; }
.dl-box p { color: var(--text-secondary); margin-bottom: 25px; font-size: 0.9rem; }

/* Help Page */
.help-hero { padding: 150px 0 60px; text-align: center; }
.help-grid {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 40px;
    margin-bottom: 100px;
}
.help-side { background: var(--bg-panel); padding: 20px; border: 1px solid #333; height: fit-content; }
.help-side li { margin-bottom: 10px; }
.help-side a { display: block; padding: 10px; color: var(--text-secondary); border-left: 2px solid transparent; }
.help-side a:hover, .help-side a.active { color: var(--neon-cyan); border-color: var(--neon-cyan); background: rgba(5,217,232,0.05); }
.help-main section {
    background: var(--bg-panel);
    border: 1px solid #333;
    padding: 40px;
    margin-bottom: 30px;
}
.help-main h3 { color: var(--neon-pink); margin-bottom: 20px; font-size: 1.5rem; }
.help-main p { color: var(--text-secondary); margin-bottom: 15px; }

/* Responsive */
@media (max-width: 992px) {
    .stats-grid, .feat-grid, .testi-grid, .price-grid { grid-template-columns: repeat(2, 1fr); }
    .f-grid { grid-template-columns: 1fr 1fr; }
    .p-card.pro { transform: none; }
}
@media (max-width: 768px) {
    .nav-menu { display: none; }
    .hero-title { font-size: 2.5rem; }
    .stats-grid, .feat-grid, .testi-grid, .price-grid, .dl-grid, .help-grid { grid-template-columns: 1fr; }
}