:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --bg: #0f172a;
    --card-bg: rgba(255, 255, 255, 0.05);
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
}

body {
    margin: 0;
    background-color: var(--bg);
    color: var(--text-main);
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 动态背景装饰 */
.bg-decoration {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 50% 50%, #1e293b 0%, #0f172a 100%);
    z-index: -1;
}

.bg-decoration::before {
    content: "";
    position: absolute;
    top: -10%; left: -10%;
    width: 40%; height: 40%;
    background: var(--primary);
    filter: blur(150px);
    opacity: 0.15;
    animation: float 10s infinite alternate;
}

@keyframes float {
    from { transform: translate(0, 0); }
    to { transform: translate(100px, 100px); }
}

/* 导航 */
header {
    padding: 25px 0;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 1px;
}

.logo span {
    color: var(--primary);
}

.status-tag {
    font-size: 13px;
    background: rgba(59, 130, 246, 0.1);
    padding: 5px 15px;
    border-radius: 20px;
    color: var(--primary);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

/* Hero区 */
.hero {
    text-align: center;
    padding: 100px 0 60px;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 20px;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.description {
    max-width: 700px;
    margin: 0 auto;
    color: var(--text-dim);
    font-size: 1.1rem;
}

/* 卡片布局 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    padding-bottom: 100px;
}

.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 40px;
    border-radius: 24px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
}

.glass-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.icon-box {
    font-size: 40px;
    margin-bottom: 20px;
}

.glass-card h3 {
    margin-bottom: 15px;
    font-size: 22px;
}

.glass-card p {
    color: var(--text-dim);
    margin-bottom: 25px;
}

.learn-more {
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
}

/* 弹窗 */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    display: grid;
    place-items: center;
    opacity: 0;
    pointer-events: none;
    transition: 0.3s;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: #1e293b;
    width: 90%;
    max-width: 550px;
    border-radius: 28px;
    padding: 40px;
    position: relative;
    border: 1px solid rgba(255,255,255,0.1);
}

.close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: #fff;
    font-size: 30px;
    cursor: pointer;
}

.modal-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
}

.modal-icon {
    font-size: 30px;
    background: var(--primary);
    width: 60px; height: 60px;
    display: grid; place-items: center;
    border-radius: 15px;
}

.feature-item {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}

.num {
    color: var(--primary);
    font-weight: 800;
    font-size: 1.2rem;
    font-family: serif;
}

.feature-item h4 { margin-bottom: 5px; }
.feature-item p { color: var(--text-dim); font-size: 14px; }

/* 页脚 */
footer {
    padding: 60px 0;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.disclaimer {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    padding: 20px;
    border-radius: 12px;
    font-size: 13px;
    margin-bottom: 20px;
}

.copyright {
    text-align: center;
    color: #475569;
    font-size: 12px;
}