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

:root {
    --primary-color: #ff6b35;
    --secondary-color: #ff8c42;
    --dark-color: #2c3e50;
    --success-color: #27ae60;
    --gradient-primary: linear-gradient(135deg, #ff6b35 0%, #ff8c42 100%);
    --gradient-secondary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #f8f9fa;
    overflow-x: hidden;
}

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

header {
    background: white;
    box-shadow: var(--shadow-sm);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

header.scrolled {
    box-shadow: var(--shadow-md);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    border-radius: 50%;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.5);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

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

.hero {
    padding: 150px 0 100px;
    background: var(--gradient-primary);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 800;
    line-height: 1.2;
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.95;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.hero-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-download-buttons {
    justify-content: center;
    margin-bottom: 40px;
}

.hero-download-btn {
    background: white;
    color: var(--primary-color);
}

.hero-download-btn svg {
    margin-right: 8px;
}

.qr-code-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 30px;
    animation: fadeInUp 0.8s ease;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.qr-code-wrapper {
    background: white;
    padding: 15px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

.qr-code-wrapper:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.qr-code-img {
    width: 180px;
    height: 180px;
    display: block;
}

.qr-code-label {
    color: white;
    font-size: 14px;
    margin-top: 15px;
    opacity: 0.9;
    text-align: center;
}

.qr-code-tip {
    color: rgba(255, 255, 255, 0.7);
    font-size: 12px;
    margin-top: 5px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
}

section { padding: 80px 0; }

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 36px;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.section-title p {
    color: #666;
    font-size: 16px;
    max-width: 700px;
    margin: 0 auto;
}

.features, .testimonials, .task-types { background: white; }

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid #eee;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    font-size: 32px;
}

.feature-card h3 { font-size: 22px; margin-bottom: 15px; color: var(--dark-color); }
.feature-card p { color: #666; line-height: 1.8; }
.how-it-works, .faq { background: #f8f9fa; }

.steps, .testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

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

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    color: white;
    margin: 0 auto 20px;
}

.step-item h3 { font-size: 20px; margin-bottom: 10px; color: var(--dark-color); }
.step-item p { color: #666; }

.testimonial-card {
    background: #f8f9fa;
    padding: 40px;
    border-radius: 20px;
    position: relative;
}

.testimonial-card::before {
    content: '"';
    font-size: 80px;
    color: var(--primary-color);
    opacity: 0.2;
    position: absolute;
    top: 10px;
    left: 20px;
    line-height: 1;
}

.user-info { display: flex; align-items: center; gap: 15px; margin-bottom: 20px; }

.user-avatar {
    width: 60px;
    height: 60px;
    background: var(--gradient-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    font-weight: bold;
}

.user-details h4 { font-size: 18px; margin-bottom: 5px; color: var(--dark-color); }
.user-details p { font-size: 14px; color: var(--primary-color); font-weight: 600; }
.testimonial-text { color: #666; line-height: 1.8; margin-bottom: 20px; position: relative; z-index: 1; }

.user-earnings {
    background: var(--gradient-primary);
    color: white;
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 600;
    display: inline-block;
}

.download-cta {
    background: var(--gradient-secondary);
    color: white;
    padding: 100px 0;
    text-align: center;
}

.download-cta h2 { font-size: 42px; margin-bottom: 20px; }
.download-cta p { font-size: 18px; margin-bottom: 40px; opacity: 0.9; }

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.download-btn {
    background: white;
    color: var(--dark-color);
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.download-btn:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.download-btn svg { width: 24px; height: 24px; }

.download-qr-codes {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 50px;
    flex-wrap: wrap;
}

.download-qr-item { display: flex; flex-direction: column; align-items: center; text-align: center; }

.download-qr-wrapper {
    background: white;
    padding: 20px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    margin-bottom: 15px;
}

.download-qr-wrapper:hover { transform: translateY(-5px); box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3); }
.download-qr-img { width: 200px; height: 200px; display: block; }
.download-qr-label { color: white; font-size: 16px; font-weight: 600; }
.download-qr-tip { color: rgba(255, 255, 255, 0.8); font-size: 14px; margin-top: 5px; }

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

.faq-item {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.faq-item:hover { box-shadow: var(--shadow-md); }
.faq-item h3 { font-size: 18px; margin-bottom: 10px; color: var(--dark-color); }
.faq-item p { color: #666; line-height: 1.8; }

footer {
    background: var(--dark-color);
    color: white;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 { font-size: 18px; margin-bottom: 20px; color: white; }
.footer-section ul { list-style: none; }
.footer-section ul li { margin-bottom: 10px; }
.footer-section ul a { color: #aaa; text-decoration: none; transition: var(--transition); }
.footer-section ul a:hover { color: white; }

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #aaa;
}

.footer-notice { margin-top: 10px; font-size: 12px; opacity: 0.7; }

.floating-cta {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.floating-cta .btn { box-shadow: var(--shadow-lg); padding: 15px 35px; font-size: 18px; }

.floating-contact {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.floating-contact:hover {
    background: var(--primary-color);
    color: white;
}

@media (max-width: 768px) {
    .hero h1 { font-size: 32px; }
    .hero p { font-size: 16px; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .section-title h2 { font-size: 28px; }
    .download-cta h2 { font-size: 32px; }
    .download-qr-codes { gap: 30px; }
    .download-qr-img { width: 160px; height: 160px; }
    .download-qr-wrapper { padding: 15px; }
    .download-qr-label { font-size: 14px; }
    .download-qr-tip { font-size: 12px; }
    .faq-grid { grid-template-columns: 1fr; }
    .app-showcase-grid { grid-template-columns: 1fr; max-width: 360px; margin: 0 auto; }
    .app-screen-image { height: 400px; }
    .floating-cta { bottom: 20px; right: 20px; }
    .floating-cta .btn { padding: 12px 25px; font-size: 14px; }
    .qr-code-img { width: 150px; height: 150px; }
    .qr-code-wrapper { padding: 12px; }
    .qr-code-label { font-size: 13px; }
    .qr-code-tip { font-size: 11px; }
    .mobile-menu-btn { display: block; }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
    }
    .nav-links.active { display: flex; }
    .nav-links li { margin-bottom: 10px; }
}

.countdown { display: flex; justify-content: center; gap: 20px; margin: 30px 0; }

.countdown-item {
    background: rgba(255, 255, 255, 0.2);
    padding: 20px 30px;
    border-radius: 10px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.countdown-number { font-size: 36px; font-weight: bold; display: block; }
.countdown-label { font-size: 12px; opacity: 0.8; }

.data-dashboard { background: white; padding: 60px 0; }

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.data-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
}

.data-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.data-value { font-size: 32px; font-weight: bold; color: var(--primary-color); margin-bottom: 10px; }
.data-label { color: #666; font-size: 14px; }

.app-showcase { background: #fff8f4; overflow: hidden; }

.app-showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
    align-items: end;
}

.app-screen-card {
    background: white;
    border: 1px solid #f3e3dc;
    border-radius: 20px;
    padding: 24px 24px 28px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.app-screen-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.app-screen-image { display: block; width: min(100%, 300px); height: 420px; object-fit: contain; margin: 0 auto 20px; }
.app-screen-card h3 { color: var(--dark-color); font-size: 20px; margin-bottom: 8px; }
.app-screen-card p { color: #777; font-size: 14px; }

.task-types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.task-type-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 35px;
    border-radius: 15px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.task-type-card:nth-child(2) { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); }
.task-type-card:nth-child(3) { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }
.task-type-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.task-type-card h3 { font-size: 20px; margin-bottom: 15px; }
.task-type-card p { font-size: 14px; opacity: 0.9; margin-bottom: 20px; }
.task-stats { display: flex; justify-content: space-between; font-size: 12px; opacity: 0.8; }

.new-user-bonus {
    background: linear-gradient(135deg, #ff6b35 0%, #ff8c42 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
}

.bonus-items { display: flex; justify-content: center; gap: 30px; margin: 40px 0; flex-wrap: wrap; }
.bonus-item { background: rgba(255, 255, 255, 0.2); padding: 30px 40px; border-radius: 15px; backdrop-filter: blur(10px); border: 1px solid rgba(255, 255, 255, 0.3); }
.bonus-amount { font-size: 36px; font-weight: bold; margin-bottom: 10px; }
.bonus-desc { font-size: 14px; opacity: 0.9; }
.bonus-remaining { font-size: 12px; opacity: 0.8; margin-top: 10px; }

.mobile-menu-btn { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--dark-color); }

.scroll-indicator { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); animation: scrollDown 2s infinite; }

@keyframes scrollDown {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

.scroll-indicator svg { width: 30px; height: 30px; color: white; }

.data-trend { font-size: 12px; margin-top: 5px; }
.data-trend.success { color: var(--success-color); }
.data-trend.muted { color: #666; }
.data-trend.primary { color: var(--primary-color); }