* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #0077B6;
    --primary-light: #00B4D8;
    --accent: #00B4D8;
    --accent-light: #48CAE4;
    --text: #1e293b;
    --text-light: #64748b;
    --bg: #f8fafc;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #0077B6 0%, #00B4D8 50%, #48CAE4 100%);
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}
.nav-logo { display: flex; align-items: center; text-decoration: none; }
.nav-logo-img { height: 48px; width: auto; }
.nav-links { display: flex; list-style: none; gap: 2rem; }
.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s;
}
.nav-links a:hover { color: var(--accent); }
.hero {
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    padding: 120px 2rem 80px;
    color: white;
    text-align: center;
}
.hero h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 1rem; }
.hero p { font-size: 1.1rem; opacity: 0.9; max-width: 600px; margin: 0 auto; }
.section { padding: 80px 2rem; }
.container { max-width: 1200px; margin: 0 auto; }
.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 2rem;
    text-align: center;
}
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}
.content-card {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}
.content-card h3 {
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}
.content-card p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1rem;
}
.feature-list {
    list-style: none;
    padding: 0;
}
.feature-list li {
    padding: 12px 0;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.feature-list li:last-child { border-bottom: none; }
.feature-icon {
    width: 24px;
    height: 24px;
    background: rgba(0, 180, 216, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 0.8rem;
    flex-shrink: 0;
    margin-top: 2px;
}
.feature-desc {
    color: var(--text-light);
    font-size: 0.9rem;
}
.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1.5rem;
}
.tech-tag {
    padding: 6px 16px;
    background: rgba(0, 180, 216, 0.1);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
}
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--gradient);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s;
    margin-top: 2rem;
}
.back-wrap {
    text-align: center;
}
.back-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 180, 216, 0.3);
}
.screenshots {
    margin-top: 3rem;
}
.screenshots h3 {
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    text-align: center;
}
.screenshot-carousel {
    position: relative;
    overflow: hidden;
}
.screenshot-track {
    display: flex;
    transition: transform 0.4s ease;
}
.screenshot-slide {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
    flex: 0 0 auto;
    overflow: hidden;
}
.screenshot-item {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    max-width: 100%;
    min-width: 0;
}
.screenshot-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}
.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
}
.screenshot-caption {
    padding: 1rem 1.2rem;
    font-size: 0.9rem;
    color: var(--text-light);
    text-align: center;
    border-top: 1px solid #f1f5f9;
}
.carousel-btn {
    position: absolute;
    top: 40%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 119, 182, 0.85);
    color: white;
    font-size: 1.3rem;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s, opacity 0.3s;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}
.carousel-btn:hover { background: var(--primary); }
.carousel-btn:disabled { opacity: 0.3; cursor: default; }
.carousel-btn.prev { left: 8px; }
.carousel-btn.next { right: 8px; }
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 1.2rem;
}
.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: none;
    background: #cbd5e1;
    cursor: pointer;
    transition: background 0.3s, transform 0.3s;
}
.carousel-dot.active {
    background: var(--primary);
    transform: scale(1.2);
}
.footer {
    background: var(--primary);
    color: white;
    padding: 40px 2rem;
    text-align: center;
}
.footer p { opacity: 0.7; font-size: 0.9rem; }
@media (max-width: 768px) {
    .content-grid { grid-template-columns: 1fr; }
    .screenshot-slide { grid-template-columns: 1fr; }
    .hero h1 { font-size: 1.8rem; }
    .nav-links { display: none; }
}