:root {
    --primary-blue: #00A0E9;
    --primary-green: #07C160;
    --bg-dark: #05070a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --text-white: #ffffff;
    --text-gray: #8b949e;
    --glass-border: rgba(255, 255, 255, 0.08);
    --transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    --glow-blue: rgba(0, 160, 233, 0.4);
    --glow-green: rgba(7, 193, 96, 0.3);
}

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

body {
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
    scroll-behavior: smooth;
    position: relative;
}

/* Noise Overlay */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.04;
    pointer-events: none;
    z-index: 9999;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* Header & Nav */
header {
    height: 80px;
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(5, 7, 10, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 38px;
    width: 38px;
    border-radius: 10px;
    box-shadow: 0 0 20px var(--glow-blue);
}

.logo-text {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(90deg, #60c5f1, #70e4a7);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Floating Elements */
.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.float-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
}

.card-1 {
    width: 200px;
    height: 120px;
    top: 20%;
    right: 15%;
    transform: rotate(15deg);
    animation: float 6s ease-in-out infinite;
}

.card-2 {
    width: 150px;
    height: 150px;
    bottom: 25%;
    right: 25%;
    transform: rotate(-10deg);
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0) rotate(15deg);
    }

    50% {
        transform: translateY(-20px) rotate(18deg);
    }
}

.hero h1 {
    font-size: clamp(3rem, 10vw, 5rem);
    font-weight: 900;
    margin-bottom: 24px;
    line-height: 1.1;
    letter-spacing: -2px;
}

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

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-gray);
}

.nav-links a:hover {
    color: white;
}

/* Buttons */
.btn {
    padding: 12px 28px;
    border-radius: 100px;
    font-weight: 600;
    display: inline-block;
    cursor: pointer;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    color: white;
    box-shadow: 0 10px 30px rgba(0, 160, 233, 0.2);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(0, 160, 233, 0.4);
}

.btn-outline {
    border: 1px solid var(--glass-border);
    color: white;
    background: rgba(255, 255, 255, 0.05);
}

.btn-outline:hover {
    background: white;
    color: black;
}

.btn-secondary {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(5px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-big {
    padding: 18px 40px;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

/* Ambient Lights */
.ambient-light {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.4;
}

.light-1 {
    width: 500px;
    height: 500px;
    background: var(--primary-blue);
    top: -100px;
    right: -100px;
}

.light-2 {
    width: 400px;
    height: 400px;
    background: var(--primary-green);
    bottom: 10%;
    left: -50px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('assets/hero_bg.png') no-repeat center center/cover;
    opacity: 0.35;
    z-index: -2;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 400px;
    background: linear-gradient(to top, var(--bg-dark), transparent);
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.5rem;
    color: var(--text-gray);
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 60px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-blue);
}

.stat-label {
    color: var(--text-gray);
    font-size: 0.9rem;
}

/* Features */
.section {
    padding: 120px 0;
}

.section-title {
    text-align: center;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 80px;
    letter-spacing: -1px;
}

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

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    padding: 48px;
    border-radius: 28px;
    backdrop-filter: blur(20px);
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2), inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.feature-card:hover {
    transform: translateY(-12px);
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.icon-box {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.alipay-blue {
    background: rgba(0, 160, 233, 0.15);
    color: #60c5f1;
    box-shadow: 0 0 20px rgba(0, 160, 233, 0.2);
}

.wechat-green {
    background: rgba(7, 193, 96, 0.15);
    color: #70e4a7;
    box-shadow: 0 0 20px rgba(7, 193, 96, 0.2);
}

.gold {
    background: rgba(255, 215, 0, 0.15);
    color: #ffd700;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.2);
}

.feature-card h3 {
    margin-bottom: 20px;
    font-size: 1.4rem;
    font-weight: 700;
}

.feature-card p {
    color: var(--text-gray);
    font-size: 1rem;
    line-height: 1.7;
}

/* Steps */
.dark-alt {
    background: #080a0e;
}

.steps-container {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding: 40px 0;
}

.step-item {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 2;
    padding: 0 30px;
}

.step-num {
    width: 50px;
    height: 50px;
    background: var(--bg-dark);
    border: 2px solid var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-weight: 800;
    color: var(--primary-blue);
    box-shadow: 0 0 20px var(--glow-blue);
}

/* Download Panel */
.glass-panel {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0.01) 100%);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(30px);
    border-radius: 40px;
    padding: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.glass-panel::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: var(--primary-blue);
    filter: blur(150px);
    opacity: 0.1;
    top: -150px;
    right: -150px;
}

.download-text h2 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.download-text p {
    color: var(--text-gray);
    font-size: 1.1rem;
}

.download-btns {
    margin-top: 40px;
    display: flex;
    gap: 24px;
}

.qr-code-box {
    background: white;
    padding: 24px;
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Footer */
footer {
    padding: 80px 0;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.4rem;
    font-weight: 700;
}

.footer-logo img {
    height: 34px;
}

.copyright {
    color: var(--text-gray);
    font-size: 0.95rem;
    opacity: 0.7;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.fade-in-delay {
    animation: fadeIn 1.2s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
    opacity: 0;
}

.fade-in-delay-2 {
    animation: fadeIn 1.2s cubic-bezier(0.16, 1, 0.3, 1) 0.6s forwards;
    opacity: 0;
}

/* Responsive */
@media (max-width: 968px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }

    .steps-container {
        flex-direction: column;
        gap: 60px;
    }

    .glass-panel {
        flex-direction: column;
        text-align: center;
        gap: 48px;
        padding: 60px 24px;
    }

    .download-btns {
        justify-content: center;
        flex-wrap: wrap;
    }

    .nav-links {
        display: none;
    }

    .float-card {
        display: none;
    }
}