:root {
    --primary: #0089ff;
    --primary-hover: #0073e6;
    --text-dark: #171a1d;
    --text-gray: #5c6368;
    --bg-light: #f4f6f8;
    --border: #e3e5e7;
    --radius: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
    color: var(--text-dark);
    line-height: 1.6;
    background: #fff;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 22px;
    font-weight: 600;
    color: var(--primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-menu a {
    font-size: 15px;
    color: var(--text-dark);
    transition: color 0.2s;
}

.nav-menu a:hover, .nav-menu a.active {
    color: var(--primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Buttons */
.btn-primary {
    background: var(--primary);
    color: #fff;
    padding: 8px 20px;
    border-radius: var(--radius);
    font-weight: 500;
    transition: background 0.2s;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-outline {
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: 8px 20px;
    border-radius: var(--radius);
    font-weight: 500;
}

.btn-text {
    color: var(--text-gray);
    font-size: 14px;
}

.btn-text:hover {
    color: var(--primary);
}

.btn-large {
    padding: 12px 32px;
    font-size: 16px;
}

.btn-white {
    background: #fff;
    color: var(--primary);
    padding: 12px 32px;
    border-radius: var(--radius);
    font-weight: 500;
}

.btn-outline-white {
    border: 1px solid #fff;
    color: #fff;
    padding: 12px 32px;
    border-radius: var(--radius);
    font-weight: 500;
}

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%);
    overflow: hidden;
}

.page-hero {
    padding: 60px 0;
    background: var(--bg-light);
}

.hero-inner {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.badge {
    display: inline-block;
    background: rgba(0, 137, 255, 0.1);
    color: var(--primary);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-content h1 {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 24px;
    color: #111;
}

.hero-content p {
    font-size: 18px;
    color: var(--text-gray);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 16px;
}

.hero-visual {
    flex: 1;
    position: relative;
}

/* Browser Mockup */
.browser-mockup {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.12);
    overflow: hidden;
    border: 1px solid var(--border);
}

.browser-header {
    background: #f4f5f6;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.browser-url {
    background: #fff;
    padding: 4px 16px;
    border-radius: 4px;
    font-size: 12px;
    color: var(--text-gray);
    margin-left: 16px;
    flex: 1;
    text-align: center;
}

.browser-mockup img {
    width: 100%;
    display: block;
}

.rounded-img {
    width: 100%;
    border-radius: 12px;
}
.shadow-lg {
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* Data Section */
.data-section {
    padding: 60px 0;
    border-bottom: 1px solid var(--border);
}

.data-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.data-card h3 {
    font-size: 36px;
    color: var(--primary);
    margin-bottom: 8px;
}

.data-card p {
    color: var(--text-gray);
    font-size: 15px;
}

/* Features */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 36px;
    margin-bottom: 16px;
}

.section-header p {
    font-size: 18px;
    color: var(--text-gray);
}

.features-section {
    padding: 100px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-item {
    padding: 32px;
    background: var(--bg-light);
    border-radius: 16px;
    transition: transform 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
    background: #fff;
    box-shadow: 0 12px 24px rgba(0,0,0,0.06);
}

.f-icon {
    font-size: 40px;
    margin-bottom: 24px;
}

.feature-item h4 {
    font-size: 20px;
    margin-bottom: 12px;
}

.feature-item p {
    color: var(--text-gray);
}

/* Solutions */
.solutions-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.solution-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}

.s-img img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.s-content {
    padding: 24px;
}

.s-content h4 {
    font-size: 20px;
    margin-bottom: 12px;
}

.s-content p {
    color: var(--text-gray);
}

/* Download Page */
.download-section {
    padding: 80px 0;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 60px;
}

.download-card {
    background: var(--bg-light);
    padding: 48px 32px;
    border-radius: 16px;
    text-align: center;
}

.d-icon {
    font-size: 48px;
    margin-bottom: 24px;
}

.download-card h3 {
    font-size: 24px;
    margin-bottom: 12px;
}

.download-card p {
    color: var(--text-gray);
    margin-bottom: 32px;
    min-height: 48px;
}

.web-entry-banner {
    background: linear-gradient(135deg, #f0f7ff 0%, #e6f2ff 100%);
    padding: 48px;
    border-radius: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.web-text h3 {
    font-size: 28px;
    margin-bottom: 12px;
}

.web-text p {
    color: var(--text-gray);
    font-size: 16px;
}

/* Help Page */
.help-section {
    padding: 80px 0;
}

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

.faq-container h2 {
    font-size: 32px;
    margin-bottom: 40px;
    text-align: center;
}

.faq-item {
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
}

.faq-item h3 {
    font-size: 20px;
    margin-bottom: 16px;
    color: var(--primary);
}

.faq-item p {
    color: var(--text-gray);
    font-size: 16px;
}

.faq-item a {
    color: var(--primary);
}

/* CTA */
.cta-section {
    padding: 100px 0;
    background: var(--primary);
    color: #fff;
    text-align: center;
}

.cta-inner h2 {
    font-size: 40px;
    margin-bottom: 20px;
}

.cta-inner p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 40px;
}

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

/* Footer */
.footer {
    background: #111;
    color: #fff;
    padding: 80px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-logo {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 16px;
}

.brand-col p {
    color: #8c9296;
    font-size: 14px;
}

.footer-col h4 {
    font-size: 16px;
    margin-bottom: 24px;
}

.footer-col a {
    display: block;
    color: #8c9296;
    margin-bottom: 12px;
    font-size: 14px;
}

.footer-col a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
    color: #666;
    font-size: 14px;
}

@media (max-width: 992px) {
    .hero-inner {
        flex-direction: column;
    }
    .nav-menu {
        display: none;
    }
    .features-grid, .solutions-grid, .download-grid, .footer-grid {
        grid-template-columns: 1fr;
    }
    .data-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    .web-entry-banner {
        flex-direction: column;
        text-align: center;
        gap: 24px;
    }
    .cta-btns {
        flex-direction: column;
    }
}