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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1d4ed8;
    --accent-color: #0ea5e9;
    --bg-dark: #f8fafc;
    --bg-light: #ffffff;
    --bg-card: rgba(37, 99, 235, 0.05);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: rgba(37, 99, 235, 0.15);
    --shadow-color: rgba(37, 99, 235, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 20px var(--shadow-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-icon {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--accent-color) 100%);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 60px;
    background: linear-gradient(135deg, var(--bg-light) 0%, #eff6ff 50%, var(--bg-light) 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(14, 165, 233, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.08) 0%, transparent 60%);
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(37, 99, 235, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 2rem;
    max-width: 800px;
}

.hero-logo {
    width: 120px;
    height: 120px;
    margin: 0 auto 2rem;
    border-radius: 30px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 
        0 10px 40px rgba(37, 99, 235, 0.3),
        0 0 60px rgba(37, 99, 235, 0.15);
    animation: float 4s ease-in-out infinite;
}

.hero-icon {
    width: 70px;
    height: 70px;
    border-radius: 18px;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(2deg); }
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    margin-bottom: 1.2rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, #475569 50%, var(--text-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% auto;
    animation: shine 3s linear infinite;
}

@keyframes shine {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    letter-spacing: 1px;
}

.btn {
    padding: 1rem 3rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: 
        0 4px 20px rgba(37, 99, 235, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 8px 30px rgba(37, 99, 235, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.app-section {
    padding: 8rem 2rem;
    background: var(--bg-light);
    position: relative;
}

.app-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--border-color) 50%, transparent 100%);
}

.app-container {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.app-image {
    display: flex;
    justify-content: center;
}

.app-screenshot {
    max-width: 100%;
    height: auto;
   
}

.app-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1.2rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.app-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.app-features {
    list-style: none;
    margin-bottom: 2.5rem;
}

.app-features li {
    padding: 1rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.app-features li:hover {
    color: var(--text-primary);
    padding-left: 0.5rem;
}

.app-features i {
    color: var(--primary-color);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.download-buttons {
    display: flex;
    gap: 1.2rem;
    margin-bottom: 2.5rem;
}

.download-btn {
    flex: 1;
    padding: 1.2rem;
    border-radius: 15px;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.3s ease;
    font-weight: 600;
    font-size: 0.9rem;
    position: relative;
    overflow: hidden;
}

.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.3) 50%, transparent 100%);
    transition: left 0.5s ease;
}

.download-btn:hover::before {
    left: 100%;
}

.ios-btn {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.android-btn {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.download-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.download-btn i {
    font-size: 1.6rem;
}

.qr-code {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
}

.qr-image {
    width: 130px;
    height: 130px;
    border-radius: 20px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.qr-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.qr-code p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.4rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.about {
    padding: 8rem 2rem;
    background: var(--bg-dark);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--border-color) 50%, transparent 100%);
}

.about-container {
    max-width: 900px;
    margin: 0 auto;
}

.about-content {
    text-align: center;
}

.about-content h2 {
    font-size: 2.4rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
    font-size: 1.05rem;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    justify-content: center;
    gap: 5rem;
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-color);
}

.stat-item {
    text-align: center;
    position: relative;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.contact {
    padding: 8rem 2rem;
    background: var(--bg-light);
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--border-color) 50%, transparent 100%);
}

.contact-container {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.2rem;
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: 15px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.contact-item:hover {
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.08);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.contact-item i {
    color: var(--primary-color);
    font-size: 1.4rem;
}

.contact-item h4 {
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: 0.2rem;
}

.contact-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

.contact-form input,
.contact-form textarea {
    padding: 1rem 1.2rem;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.15);
}

.contact-form textarea {
    resize: none;
    height: 160px;
}

.footer {
    background: var(--text-primary);
    padding: 4rem 2rem 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-icon {
    width: 24px;
    height: 24px;
    border-radius: 6px;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.footer-links a:hover::after {
    width: 100%;
}

.footer-info {
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-info p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    margin-bottom: 0.5rem;
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 55px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 55px);
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 2rem;
        transition: left 0.3s ease;
        gap: 1.5rem;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        left: 0;
    }

    .menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-logo {
        width: 100px;
        height: 100px;
        font-size: 3.5rem;
    }

    .app-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .phone-mockup {
        width: 220px;
        height: 450px;
    }

    .app-info h2 {
        font-size: 2rem;
    }

    .download-buttons {
        flex-direction: column;
    }

    .about-stats {
        flex-direction: column;
        gap: 2.5rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .contact-container {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 1rem;
    }

    .hero-title {
        font-size: 1.6rem;
    }

    .btn {
        padding: 0.9rem 2rem;
        font-size: 0.9rem;
    }
}