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


:root {
    --primary-blue: #6c63ff;
    --primary-purple: #a855f7;
    --neon-blue: #00d9ff;
    --neon-purple: #ff00ff;
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.18);
    --text-light: #f0f0f0;
    --text-muted: #cccccc;
    --bg-dark: #0f0f1e;
    --shadow-glow: 0 8px 32px rgba(108, 99, 255, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

body {
    background: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(108, 99, 255, 0.15) 0%, transparent 20%),
        radial-gradient(circle at 80% 70%, rgba(168, 85, 247, 0.15) 0%, transparent 20%);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
    background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1.5rem;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.8rem; text-align: center; margin-bottom: 3rem; }
h3 { font-size: 1.8rem; }

p {
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--shadow-glow);
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(108, 99, 255, 0.4);
}

.btn {
    display: inline-block;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-purple));
    color: white;
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(108, 99, 255, 0.4);
}

.btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 25px rgba(108, 99, 255, 0.6);
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    background: rgba(15, 15, 30, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    color: var(--neon-blue);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    font-size: 1.1rem;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--neon-blue);
}

.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
}

#brand-story {
    padding-top: 140px;
    text-align: center;
}

#brand-story .glass {
    max-width: 800px;
    margin: 0 auto;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.advantage-card {
    text-align: center;
    padding: 2.5rem 2rem;
}

.advantage-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--neon-blue);
    text-shadow: 0 0 15px var(--neon-blue);
}

.advantage-data {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--neon-purple);
    margin: 1rem 0;
    text-shadow: 0 0 10px rgba(255, 0, 255, 0.5);
}

.client-demo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
}

.device-mockup {
    width: 300px;
    height: 600px;
    background: #1a1a2e;
    border-radius: 40px;
    padding: 25px 15px;
    position: relative;
    border: 12px solid #0a0a15;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.8), 0 0 40px rgba(108, 99, 255, 0.6);
}

.device-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0f0c29, #302b63);
    border-radius: 25px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.connect-btn {
    background: linear-gradient(90deg, #00d9ff, #a855f7);
    color: white;
    border: none;
    padding: 18px 40px;
    border-radius: 50px;
    font-size: 1.3rem;
    font-weight: 700;
    cursor: pointer;
    margin-top: 2rem;
    box-shadow: 0 0 30px rgba(0, 217, 255, 0.7);
    transition: all 0.3s;
    position: relative;
    z-index: 2;
}

.connect-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 40px rgba(0, 217, 255, 0.9);
}

.pulse-ring {
    position: absolute;
    width: 200px;
    height: 200px;
    border: 3px solid var(--neon-blue);
    border-radius: 50%;
    animation: pulse 2s infinite;
    opacity: 0.6;
}

@keyframes pulse {
    0% { transform: scale(0.8); opacity: 0.6; }
    100% { transform: scale(1.3); opacity: 0; }
}

.nodes-map {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 3rem;
}

.node {
    text-align: center;
    padding: 1.5rem;
    min-width: 180px;
}

.node-city {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.node-delay {
    font-size: 1.8rem;
    color: var(--neon-blue);
    font-weight: 800;
}

.node-delay::after {
    content: 'ms';
    font-size: 1rem;
    margin-left: 4px;
}

.tutorial-steps {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
    margin-top: 3rem;
}

.step {
    text-align: center;
    flex: 1;
    min-width: 250px;
    padding: 2rem;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    border-radius: 50%;
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-card {
    text-align: center;
    padding: 2.5rem 1.5rem;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--neon-blue);
    margin-bottom: 0.5rem;
    text-shadow: 0 0 15px rgba(0, 217, 255, 0.7);
}

.stat-label {
    font-size: 1.2rem;
    color: var(--text-muted);
}

.trust-badges {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
    margin-top: 3rem;
}

.badge {
    text-align: center;
    padding: 2rem;
    min-width: 200px;
}

.badge-icon {
    font-size: 3rem;
    color: var(--neon-purple);
    margin-bottom: 1rem;
    text-shadow: 0 0 15px rgba(255, 0, 255, 0.5);
}

.faq-container {
    max-width: 800px;
    margin: 3rem auto 0;
}

.faq-item {
    margin-bottom: 1.5rem;
    border-radius: 16px;
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem 2rem;
    background: rgba(255, 255, 255, 0.05);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 600;
    transition: background 0.3s;
}

.faq-question:hover {
    background: rgba(108, 99, 255, 0.1);
}

.faq-question i {
    transition: transform 0.3s;
}

.faq-answer {
    padding: 0 2rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background: rgba(255, 255, 255, 0.02);
}

.faq-item.active .faq-answer {
    padding: 1.5rem 2rem;
    max-height: 300px;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

footer {
    text-align: center;
    padding: 3rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 4rem;
    color: var(--text-muted);
}

footer a {
    color: var(--text-muted);
    text-decoration: none;
}

footer a:hover {
    color: var(--neon-blue);
}

@media (max-width: 992px) {
    h1 { font-size: 2.8rem; }
    h2 { font-size: 2.3rem; }
    .client-demo { gap: 2rem; }
    .device-mockup { width: 280px; height: 560px; }
}

@media (max-width: 768px) {
    .mobile-toggle { display: block; }
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: rgba(15, 15, 30, 0.95);
        backdrop-filter: blur(15px);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        transform: translateY(-100%);
        opacity: 0;
        transition: all 0.3s ease;
        pointer-events: none;
        z-index: 999;
    }
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    .device-mockup { width: 250px; height: 500px; }
    .nodes-map { gap: 1rem; }
    .node { min-width: 140px; padding: 1rem; }
}

@media (max-width: 576px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    section { padding: 60px 0; }
    .glass { padding: 1.5rem; }
    .stat-number { font-size: 2.8rem; }
}


/* ========== 下载页面专用样式 ========== */
.download-hero {
    padding-top: 140px;
    text-align: center;
}
.download-hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}
.download-buttons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}
.download-item {
    text-align: center;
    padding: 2rem;
    transition: all 0.3s ease;
}
.download-item:hover {
    transform: translateY(-8px);
}
.download-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: var(--neon-blue);
}
.download-btn {
    display: inline-block;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-purple));
    color: white;
    padding: 12px 28px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    margin-top: 1rem;
    transition: all 0.3s;
}
.download-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(108, 99, 255, 0.6);
}
.version-info {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}
.system-requirements {
    background: var(--glass-bg);
    border-radius: 24px;
    padding: 2rem;
    margin-top: 3rem;
}
.req-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}
.req-item {
    text-align: center;
}
.req-item i {
    font-size: 1.5rem;
    color: var(--neon-blue);
    margin-bottom: 0.5rem;
}
.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}
.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    list-style: none;
}
.feature-list i {
    color: var(--neon-blue);
    font-size: 1.2rem;
}
.version-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 2rem;
}
.version-table th, .version-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.version-table th {
    color: var(--neon-blue);
    font-weight: 600;
}
.install-steps {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 2rem;
    justify-content: center;
}
.install-step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 20px;
}
.install-step .step-num {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-weight: bold;
}
.faq-mini {
    margin-top: 3rem;
}
.faq-mini-item {
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.faq-mini-item h4 {
    color: var(--neon-blue);
    margin-bottom: 0.5rem;
}
.btn-back {
    display: inline-block;
    margin-top: 2rem;
    color: var(--text-muted);
    text-decoration: none;
}
.btn-back:hover {
    color: var(--neon-blue);
}

/* 移动端特色标签优化 */
.feature-tags {
    margin-top: 2rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.8rem;
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
}
@media (max-width: 768px) {
    .feature-tags {
        font-size: 1rem;
        font-weight: 600;
        gap: 0.6rem;
    }
    .btn-back {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}