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

/* ================== GLOBAL ================== */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: #ffffff;

    /* 多层炫酷渐变（核心） */
    background:
        radial-gradient(circle at 20% 30%, rgba(0,198,255,0.25), transparent 40%),
        radial-gradient(circle at 80% 20%, rgba(127,90,240,0.25), transparent 40%),
        radial-gradient(circle at 50% 80%, rgba(255,0,128,0.2), transparent 40%),
        #0a0a0f;

    background-attachment: fixed;
}

/* ================== BASE ================== */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* ================== HEADER ================== */
header {
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.1);

    position: sticky;
    top: 0;
    z-index: 999;
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    font-size: 20px;
    font-weight: bold;
    color: #fff;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    color: rgba(255,255,255,0.8);
    font-size: 14px;
    transition: 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: #00c6ff;
}

.menu-toggle {
    display: none;
    font-size: 22px;
    cursor: pointer;
    color: #fff;
}

/* ================== BUTTON ================== */
.btn {
    padding: 14px 30px;
    border-radius: 999px;

    background: linear-gradient(90deg, #00c6ff, #7f5af0);

    color: #fff;
    font-size: 14px;

    box-shadow:
        0 0 20px rgba(127,90,240,0.6),
        0 0 40px rgba(0,198,255,0.3);

    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-3px);

    box-shadow:
        0 0 30px rgba(127,90,240,0.9),
        0 0 60px rgba(0,198,255,0.6);
}

/* ================== HERO ================== */
.hero {
    position: relative;
    padding: 180px 0;
    text-align: center;
    overflow: hidden;
}

/* 发光背景 */
.hero::before {
    content: "";
    position: absolute;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(127,90,240,0.4), transparent 70%);
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    filter: blur(120px);
}

.hero .container {
    position: relative;
    z-index: 2;
}

/* 标题炫彩动画 */
.hero h1 {
    font-size: 64px;
    font-weight: 800;
    letter-spacing: -1px;

    background: linear-gradient(90deg, #00c6ff, #7f5af0, #ff0080);
    background-size: 200% auto;

    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;

    animation: gradientMove 6s linear infinite;
}

@keyframes gradientMove {
    0% { background-position: 0% }
    100% { background-position: 200% }
}

.hero p {
    max-width: 600px;
    margin: auto;
    margin-top: 20px;
    margin-bottom: 30px;
    color: rgba(255,255,255,0.7);
}

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

/* ================== TITLE ================== */
.section-title {
    font-size: 40px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 50px;

    background: linear-gradient(90deg, #00c6ff, #7f5af0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ================== GRID ================== */
.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

/* ================== CARD ================== */
.card {
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(20px);

    border-radius: 20px;
    padding: 30px;

    border: 1px solid rgba(99,102,241,0.5);

    box-shadow:
        0 10px 30px rgba(99,102,241,0.15);

    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-10px) scale(1.02);

    border: 1px solid rgba(127,90,240,0.5);

    box-shadow:
        0 0 40px rgba(127,90,240,0.3),
        0 0 80px rgba(0,198,255,0.2);
}

.card img {
    border-radius: 12px;
    margin-bottom: 15px;
}

/* ================== STATS ================== */
.stats {
    display: flex;
    justify-content: space-around;
    text-align: center;
}

.stats strong {
    font-size: 28px;
    color: #00c6ff;
}

/* ================== FOOTER ================== */
footer {
    background: #050509;
    color: rgba(255,255,255,0.6);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.footer a:hover {
    color: #fff;
}

/* ================== RESPONSIVE ================== */
@media (max-width: 900px) {
    .grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        background: #0f172a;
        position: absolute;
        top: 60px;
        right: 0;
        width: 220px;
        padding: 20px;
    }

    .nav-links.show {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }
}
/* 修复 Core Capabilities 卡片文字不可见 */
.card h3 {
    color: #0f172a; /* 深色标题 */
}

.card p {
    color: #475569; /* 深灰正文 */
}