:root {
    --bg: #060b18;
    --bg-soft: #0b1327;
    --card: rgba(17, 27, 53, 0.75);
    --text: #eaf1ff;
    --muted: #9fb0d8;
    --primary: #5da2ff;
    --primary-dark: #3d86ea;
    --line: rgba(146, 174, 230, 0.28);
    --glow: rgba(93, 162, 255, 0.25);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 12% -10%, rgba(69, 129, 255, 0.34), transparent 42%),
        radial-gradient(circle at 88% 4%, rgba(0, 214, 255, 0.2), transparent 36%),
        linear-gradient(180deg, #050a17, #081127 42%, #07101f);
    line-height: 1.7;
}

.container {
    width: min(1120px, 92%);
    margin: 0 auto;
}

.site-header {
    background: rgba(7, 13, 28, 0.86);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    min-height: 68px;
}

.brand {
    text-decoration: none;
    color: #f6f9ff;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.nav a {
    color: #bbcaea;
    text-decoration: none;
    padding: 8px 10px;
    border-radius: 8px;
    font-size: 14px;
}

.nav a.active,
.nav a:hover {
    background: rgba(93, 162, 255, 0.14);
    color: #e8f2ff;
}

.hero {
    background:
        linear-gradient(120deg, rgba(59, 114, 221, 0.24), rgba(0, 179, 255, 0.08) 45%, transparent),
        linear-gradient(180deg, rgba(9, 19, 42, 0.72), rgba(8, 16, 36, 0.5));
    padding: 72px 0;
    border-bottom: 1px solid var(--line);
}

.hero h1 {
    font-size: clamp(28px, 3.8vw, 44px);
    margin: 0 0 12px;
    line-height: 1.25;
}

.hero p {
    max-width: 880px;
    color: #c0d0f0;
    margin: 0 0 24px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    text-decoration: none;
    background: var(--primary);
    color: #081127;
    padding: 10px 18px;
    border-radius: 8px;
    font-weight: 600;
}

.btn:hover {
    background: var(--primary-dark);
}

.btn-light {
    background: rgba(14, 26, 52, 0.7);
    color: #d7e7ff;
    border: 1px solid var(--line);
}

.section {
    padding: 54px 0;
}

.section h2 {
    margin: 0 0 18px;
    font-size: 30px;
}

.section-gray {
    background: rgba(9, 18, 40, 0.62);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.grid-2,
.grid-3 {
    display: grid;
    gap: 18px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 18px;
    box-shadow: 0 10px 26px rgba(4, 9, 22, 0.28);
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(93, 162, 255, 0.5);
    box-shadow: 0 16px 34px rgba(10, 32, 72, 0.36);
}

.card h3 {
    margin-top: 0;
    margin-bottom: 10px;
}

.card p,
.card li {
    color: #a9bbdf;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tags span {
    background: rgba(15, 27, 55, 0.65);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 7px 14px;
    font-size: 14px;
}

.quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

.quick-links a {
    text-decoration: none;
    border: 1px solid var(--line);
    background: rgba(14, 25, 52, 0.76);
    border-radius: 10px;
    color: #cbe0ff;
    padding: 13px 14px;
}

.quick-links a:hover {
    border-color: rgba(93, 162, 255, 0.6);
    box-shadow: 0 0 0 3px var(--glow);
}

.site-footer {
    background: #060c1c;
    color: #d1d5db;
    padding-top: 34px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.site-footer h4 {
    color: #fff;
    margin: 0 0 8px;
}

.site-footer p {
    margin: 6px 0;
}

.site-footer a {
    color: #cfe0ff;
    text-decoration: none;
}

.site-footer a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.copyright {
    border-top: 1px solid var(--line);
    margin-top: 20px;
    padding: 12px 0 16px;
    font-size: 14px;
    color: #b2bac8;
}

.page-head {
    padding: 46px 0 16px;
}

.page-head h1 {
    margin: 0 0 10px;
    font-size: clamp(26px, 3.4vw, 40px);
}

.page-head p {
    margin: 0;
    color: var(--muted);
}

ul.clean {
    padding-left: 18px;
    margin: 0;
}

.info-table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(15, 26, 52, 0.78);
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
}

.info-table th,
.info-table td {
    border-bottom: 1px solid var(--line);
    padding: 12px 14px;
    text-align: left;
    vertical-align: top;
}

.info-table th {
    width: 160px;
    background: rgba(11, 20, 40, 0.9);
}

@media (max-width: 900px) {
    .nav-wrap {
        align-items: flex-start;
        flex-direction: column;
        padding: 10px 0 12px;
    }

    .section h2 {
        font-size: 26px;
    }
}