:root {
    --text: #e4e6eb;
    --accent1: #00c3ff;
    --accent2: #00ff88;
    --muted: #a0a6ab;
    --radius: 16px;
    --maxw: 850px;
    font-family: "Inter", "Microsoft YaHei", sans-serif;
}

body {
    margin: 0;
    background: radial-gradient(circle at center, #0c1118 0%, #0a0f14 100%);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    padding-bottom: 90px;
    position: relative;
}

canvas#gridCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

header {
    text-align: center;
    padding: 24px 20px 10px;
}

header img.logo {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    border: 3px solid var(--accent1);
    box-shadow: 0 0 15px rgba(0, 255, 200, 0.6);
    object-fit: cover;
    margin-bottom: 10px;
    animation: glow 4s ease-in-out infinite alternate;
}

@keyframes glow {
    from { box-shadow: 0 0 10px rgba(0,255,200,0.5); }
    to { box-shadow: 0 0 25px rgba(0,255,200,0.9); }
}

header h1 {
    font-size: 2rem;
    margin: 0;
    color: #fff;
    text-shadow: 0 0 12px rgba(0,255,255,0.4);
}

header p {
    font-size: 1rem;
    color: var(--muted);
    margin-top: 8px;
}

.container {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 10px 20px;
    position: relative;
    z-index: 2;
}

section {
    background: rgba(0,0,0,0.55);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 22px;
    box-shadow: 0 0 18px rgba(0,255,200,0.2);
    backdrop-filter: blur(3px);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    text-align: center;
}

section:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 30px rgba(0,255,200,0.35);
}

h2 {
    font-size: 1.4rem;
    color: var(--accent1);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 8px;
    margin-top: 0;
    text-shadow: 0 0 10px rgba(0,255,255,0.4);
}

p, li {
    color: var(--muted);
    font-size: 0.95rem;
}

ul {
    display: inline-block;
    text-align: left;
    margin: 0 auto;
}

.highlight {
    color: var(--accent2);
    font-weight: 600;
}

.promo {
    background: rgba(0,0,0,0.65);
    border-radius: var(--radius);
    padding: 26px;
    text-align: center;
    margin: 30px 0;
    box-shadow: 0 0 22px rgba(0,255,200,0.25);
}

.promo h2 {
    color: var(--accent2);
    font-size: 1.6rem;
    margin-bottom: 10px;
    text-shadow: 0 0 12px rgba(0,255,200,0.5);
}

.fixed-cta {
    position: fixed;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    text-align: center;
}

.fixed-cta a {
    background: linear-gradient(90deg, var(--accent1), var(--accent2));
    color: white;
    text-decoration: none;
    padding: 16px 60px;
    border-radius: 999px;
    font-weight: bold;
    font-size: 1rem;
    white-space: nowrap; /* 文字一行显示 */
    box-shadow: 0 0 22px rgba(0,255,200,0.35);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    display: inline-block;
}

.fixed-cta a:hover {
    transform: scale(1.05);
    box-shadow: 0 0 32px rgba(0,255,200,0.8);
}

@media (max-width: 600px) {
    .fixed-cta a {
    font-size: 0.9rem;
    padding: 14px 28px;
    }
}

footer {
    text-align: center;
    padding: 25px 10px;
    color: var(--muted);
    font-size: 0.9rem;
    background: rgba(0,0,0,0.65);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(3px);
}