:root {
    --primary: #0066cc;
    --primary-dark: #0052a3;
    --bg-color: #f0fdf4; /* 极浅的清爽绿背景 */
    --text-color: #1e293b;
    --text-muted: #64748b;
    --card-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 1);
    --accent: #10b981; /* 活力绿 */
    --accent-gradient: linear-gradient(135deg, #34d399, #10b981);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, rgba(52, 211, 153, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(56, 189, 248, 0.15) 0px, transparent 50%);
    background-attachment: fixed;
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.highlight {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.glass-effect {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.04);
}

/* Header & Nav */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 800;
    color: var(--text-color);
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links > a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 15px;
    transition: color 0.2s;
}

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

.btn-primary {
    background: var(--accent-gradient) !important;
    color: #fff !important;
    padding: 10px 24px;
    border-radius: 24px;
    font-weight: 600 !important;
    transition: transform 0.2s, box-shadow 0.2s !important;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.3);
}

/* Language Selector */
.lang-selector {
    position: relative;
    display: inline-block;
}

.lang-btn {
    background: #fff;
    border: 1px solid rgba(0,0,0,0.08);
    color: var(--text-color);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
    box-shadow: 0 2px 6px rgba(0,0,0,0.02);
}

.lang-btn:hover {
    background: #f8fafc;
    border-color: rgba(0,0,0,0.15);
}

.lang-dropdown {
    display: none;
    position: absolute;
    top: 120%;
    right: 0;
    background: #fff;
    border: 1px solid rgba(0,0,0,0.08);
    border-radius: 16px;
    padding: 8px;
    min-width: 150px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.lang-selector:hover .lang-dropdown {
    display: block;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.lang-dropdown a {
    display: block;
    color: var(--text-color);
    text-decoration: none;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.lang-dropdown a:hover, .lang-dropdown a.active {
    background: #f1f5f9;
    color: var(--accent);
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 120px 24px;
    gap: 60px;
    min-height: calc(100vh - 72px);
}

.hero-content {
    flex: 1.2;
}

.hero h1 {
    font-size: 56px;
    line-height: 1.15;
    margin-bottom: 24px;
    font-weight: 800;
    letter-spacing: -1px;
    color: #0f172a;
}

.hero p {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 480px;
    line-height: 1.7;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background-color: #0f172a;
    color: #fff;
    text-decoration: none;
    padding: 18px 36px;
    border-radius: 16px;
    font-size: 16px;
    font-weight: 700;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.15);
}

.btn-download i {
    font-size: 22px;
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(15, 23, 42, 0.25);
    background-color: #1e293b;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    position: relative;
}

/* App Mockup UI - Light & Fresh */
.app-mockup {
    width: 360px;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    transform: perspective(1000px) rotateY(-12deg) rotateX(4deg);
    transition: transform 0.5s ease, box-shadow 0.5s ease;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
}

.app-mockup:hover {
    transform: perspective(1000px) rotateY(-4deg) rotateX(2deg);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.12);
}

.mockup-header {
    height: 40px;
    background: rgba(255,255,255,0.9);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    padding: 0 16px;
    position: relative;
}

.dots {
    display: flex;
    gap: 8px;
}

.dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dots span:nth-child(1) { background: #ff5f56; }
.dots span:nth-child(2) { background: #ffbd2e; }
.dots span:nth-child(3) { background: #27c93f; }

.mockup-title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 13px;
    color: #94a3b8;
    font-weight: 600;
}

.mockup-body {
    padding: 40px 30px;
    background: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.earnings-circle {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: #f8fafc;
    border: 8px solid #f1f5f9;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-bottom: 30px;
    box-shadow: inset 0 4px 10px rgba(0,0,0,0.02);
}

.earnings-circle::after {
    content: '';
    position: absolute;
    top: -8px; right: -8px; bottom: -8px; left: -8px;
    border-radius: 50%;
    border: 8px solid transparent;
    border-top-color: var(--accent);
    border-right-color: var(--accent);
    transform: rotate(45deg);
}

.counter {
    font-family: "SF Mono", Monaco, monospace;
    font-size: 32px;
    color: var(--accent);
    font-weight: 800;
    margin-bottom: 4px;
}

.earnings-circle p {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
    margin: 0;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #f1f5f9;
    border-radius: 4px;
    margin-bottom: 12px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
}

.time-left {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
    margin: 0;
}

/* Features Section */
.features {
    padding: 100px 24px;
}

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

.section-title h2 {
    font-size: 40px;
    font-weight: 800;
    color: #0f172a;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    padding: 40px 32px;
    border-radius: 24px;
    background: #fff;
    border: 1px solid rgba(0,0,0,0.04);
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 10px 30px rgba(0,0,0,0.02);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(16, 185, 129, 0.08);
}

.icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: #ecfdf5;
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
    color: #0f172a;
    font-weight: 700;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.6;
}

/* Pro Section */
.pro-section {
    padding: 60px 24px 100px;
}

.pro-content {
    display: flex;
    align-items: center;
    padding: 80px 60px;
    border-radius: 32px;
    background: #fff;
    border: 1px solid rgba(16, 185, 129, 0.2);
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(16, 185, 129, 0.05);
}

.pro-content::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 6px;
    background: var(--accent-gradient);
}

.pro-text {
    flex: 1;
    padding-right: 60px;
}

.pro-text h2 {
    font-size: 40px;
    margin-bottom: 16px;
    color: #0f172a;
    font-weight: 800;
}

.pro-text > p {
    color: var(--text-muted);
    font-size: 18px;
    margin-bottom: 32px;
}

.pro-list {
    list-style: none;
}

.pro-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 20px;
    font-size: 16px;
    color: #475569;
}

.pro-list i {
    color: var(--accent);
    font-size: 22px;
    margin-top: 2px;
}

.pro-list strong {
    color: #1e293b;
}

.pro-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.theme-showcase {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.theme-card {
    padding: 24px 32px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 300px;
    transform: rotate(4deg);
    transition: transform 0.3s;
    box-shadow: 0 15px 35px rgba(0,0,0,0.08);
}

.theme-card:hover {
    transform: rotate(0deg) scale(1.05);
    z-index: 10;
}

.theme-card.light {
    background: #fff;
    border: 1px solid #e2e8f0;
    color: #0f172a;
    margin-left: -40px;
}

.theme-card.gold {
    background: linear-gradient(135deg, #fef08a, #fde047);
    color: #854d0e;
    margin-left: 40px;
}

.theme-card h4 {
    font-size: 28px;
    font-family: monospace;
    font-weight: 800;
    margin: 0;
}

.theme-card span {
    font-size: 13px;
    font-weight: 600;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Footer */
footer {
    background: #fff;
    border-top: 1px solid rgba(0,0,0,0.05);
    padding: 60px 0 40px;
}

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

.footer-logo {
    font-size: 20px;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 12px;
}

.footer-left p {
    color: var(--text-muted);
    font-size: 14px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 32px;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Privacy Page Specific */
.privacy-page body {
    background: #fff;
}

.privacy-container {
    max-width: 800px;
    margin: 60px auto 100px;
    padding: 60px;
    border-radius: 32px;
    background: #fff;
    border: 1px solid rgba(0,0,0,0.05);
    box-shadow: 0 20px 40px rgba(0,0,0,0.02);
}

.privacy-container h1 {
    font-size: 40px;
    margin-bottom: 12px;
    color: #0f172a;
    font-weight: 800;
}

.privacy-container > p:first-of-type {
    color: var(--text-muted);
    margin-bottom: 40px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    font-weight: 500;
}

.privacy-container h2 {
    font-size: 24px;
    color: #0f172a;
    margin: 48px 0 20px;
    font-weight: 700;
}

.privacy-container p, .privacy-container ul {
    color: #475569;
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 16px;
}

.privacy-container ul {
    padding-left: 24px;
}

.privacy-container li {
    margin-bottom: 12px;
}

.privacy-container strong {
    color: #1e293b;
}

.privacy-container a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.privacy-container a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 900px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 60px;
    }
    
    .hero p {
        margin: 0 auto 40px;
    }
    
    .hero-image {
        justify-content: center;
        margin-top: 40px;
    }
    
    .app-mockup {
        transform: none;
    }
    
    .app-mockup:hover {
        transform: translateY(-5px);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .pro-content {
        flex-direction: column;
        padding: 40px 24px;
    }
    
    .pro-text {
        padding-right: 0;
        margin-bottom: 50px;
        text-align: center;
    }
    
    .pro-list li {
        text-align: left;
    }
    
    .theme-card {
        margin-left: 0 !important;
        transform: none;
    }
}

@media (max-width: 600px) {
    .nav-links > a:not(.btn-primary) {
        display: none;
    }
    
    .hero h1 {
        font-size: 40px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 24px;
    }
    
    .footer-links a {
        margin: 0 12px;
    }
    
    .privacy-container {
        padding: 40px 24px;
    }
}