:root {
    --deep-blue: #003153;
    --gold: #FFC048;
    --gold-soft: #FFD580;
    --text-primary: #ffffff;
    --text-secondary: #b0bec5;
    --surface: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(255, 192, 72, 0.3);
    --radius-card: 32px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

body {
    background: radial-gradient(circle at 50% 20%, #002a45 0%, #001a2e 60%, #000d1a 100%);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
}

/* 科技网格背景 */
.tech-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(rgba(255, 192, 72, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 192, 72, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: 0;
    pointer-events: none;
}

/* 浮动光点 */
.glow-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(50px);
    opacity: 0.07;
    z-index: 0;
    pointer-events: none;
    animation: float 8s infinite alternate ease-in-out;
}

.glow-orb.orb-1 {
    width: 250px;
    height: 250px;
    background: var(--gold);
    top: -10%;
    left: -10%;
}

.glow-orb.orb-2 {
    width: 180px;
    height: 180px;
    background: #2ecc71;
    bottom: -5%;
    right: -5%;
    animation-duration: 10s;
}

@keyframes float {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(30px, 20px);
    }
}

/* 主内容区 */
.main-content {
    position: relative;
    z-index: 2;
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 1.5rem;
}

.landing-card {
    width: 100%;
    max-width: 420px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border-radius: var(--radius-card);
    border: 1px solid var(--border-glow);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 192, 72, 0.08) inset;
    text-align: center;
    padding: 2.5rem 1.5rem 2rem;
    transition: all 0.3s ease;
    animation: cardEntry 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes cardEntry {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-container {
    margin-bottom: 1.5rem;
    position: relative;
}

.logo-img {
    width: 130px;
    height: auto;
    filter: drop-shadow(0 0 15px rgba(255, 192, 72, 0.4));
    transition: transform 0.4s ease;
}

.logo-img:hover {
    transform: scale(1.03);
}

.brand-name {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--gold);
    margin: 0.5rem 0 0.2rem;
    text-shadow: 0 0 10px rgba(255, 192, 72, 0.3);
}

.brand-sub {
    font-size: 0.85rem;
    font-weight: 300;
    letter-spacing: 3px;
    color: var(--gold-soft);
    text-transform: uppercase;
    margin-bottom: 1.8rem;
}

.trust-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 40px;
    padding: 0.4rem 1.5rem;
    margin-bottom: 2rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.trust-dot {
    width: 8px;
    height: 8px;
    background: #2ecc71;
    border-radius: 50%;
    box-shadow: 0 0 8px #2ecc71;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.4;
    }
}

.qr-section {
    margin-top: 0.5rem;
}

.qr-img {
    width: 130px;
    border-radius: 20px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
    margin-bottom: 1rem;
    transition: transform 0.3s ease;
}

.qr-img:active {
    transform: scale(0.96);
}

.qr-hint {
    color: var(--gold-soft);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.3rem;
}

.qr-sub-hint {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    letter-spacing: 1px;
}

/* 页脚 */
.footer {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 1rem;
    font-size: 0.7rem;
    color: rgba(255, 192, 72, 0.5);
}

.footer a {
    color: rgba(255, 192, 72, 0.6);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* 移动端调整 */
@media (max-width: 400px) {
    .landing-card {
        padding: 2rem 1.2rem 1.8rem;
    }

    .brand-name {
        font-size: 1.8rem;
    }
}