* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, "Microsoft YaHei", sans-serif;
    background: #0f172a;
    color: #e5e7eb;
}

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

.nav {
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 42px;
    background: rgba(15, 23, 42, .86);
    border-bottom: 1px solid rgba(255,255,255,.08);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(16px);
}

.logo {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: .3px;
}

.logo span {
    color: #60a5fa;
}

.nav-links a {
    margin-left: 18px;
    color: #cbd5e1;
}

.nav-links a.btn {
    color: #fff;
}

.hero {
    min-height: calc(100vh - 72px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 70px 24px;
    background:
        radial-gradient(circle at 20% 20%, rgba(37,99,235,.35), transparent 30%),
        radial-gradient(circle at 80% 30%, rgba(14,165,233,.22), transparent 32%),
        linear-gradient(135deg, #020617, #111827 45%, #0f172a);
}

.hero-card {
    max-width: 1060px;
    width: 100%;
    padding: 70px 58px;
    border-radius: 32px;
    background: rgba(255,255,255,.075);
    border: 1px solid rgba(255,255,255,.14);
    box-shadow: 0 30px 120px rgba(0,0,0,.42);
}

.badge {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(96,165,250,.16);
    color: #bfdbfe;
    border: 1px solid rgba(96,165,250,.28);
    margin-bottom: 22px;
}

.hero h1 {
    font-size: 58px;
    line-height: 1.08;
    margin: 0 0 24px;
}

.hero p {
    max-width: 760px;
    color: #cbd5e1;
    font-size: 20px;
    line-height: 1.8;
}

.btn-row {
    margin-top: 34px;
}

.btn {
    display: inline-block;
    padding: 13px 22px;
    border-radius: 14px;
    background: #2563eb;
    color: #fff;
    border: 0;
    cursor: pointer;
    font-size: 15px;
}

.btn:hover {
    background: #1d4ed8;
}

.btn.secondary {
    background: rgba(255,255,255,.10);
    border: 1px solid rgba(255,255,255,.13);
}

.btn.danger {
    background: #dc2626;
}

.page {
    max-width: 1180px;
    margin: 0 auto;
    padding: 38px 22px 80px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.grid.two {
    grid-template-columns: repeat(2, 1fr);
}

.card {
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.10);
    border-radius: 22px;
    padding: 24px;
    box-shadow: 0 18px 50px rgba(0,0,0,.22);
}

.card h3 {
    margin: 0 0 12px;
}

.stat {
    color: #94a3b8;
    font-size: 14px;
}

.stat-num {
    font-size: 34px;
    font-weight: 800;
    margin-top: 8px;
}

.table {
    width: 100%;
    border-collapse: collapse;
    overflow: hidden;
}

.table th,
.table td {
    padding: 14px 12px;
    border-bottom: 1px solid rgba(255,255,255,.09);
    text-align: left;
}

.table th {
    color: #93c5fd;
    font-weight: 700;
}

.input {
    width: 100%;
    padding: 13px 14px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,.16);
    background: rgba(15,23,42,.8);
    color: #fff;
    outline: none;
}

.input:focus {
    border-color: #60a5fa;
}

.form-row {
    margin-bottom: 14px;
}

.label {
    display: block;
    margin-bottom: 7px;
    color: #cbd5e1;
    font-size: 14px;
}

.notice {
    padding: 13px 15px;
    border-radius: 14px;
    background: rgba(34,197,94,.13);
    color: #bbf7d0;
    border: 1px solid rgba(34,197,94,.25);
    margin-bottom: 18px;
}

.notice.error {
    background: rgba(239,68,68,.13);
    color: #fecaca;
    border-color: rgba(239,68,68,.25);
}

.auth-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px;
    background:
        radial-gradient(circle at 20% 20%, rgba(37,99,235,.35), transparent 30%),
        linear-gradient(135deg, #020617, #0f172a);
}

.auth-card {
    width: 100%;
    max-width: 430px;
}

.small {
    color: #94a3b8;
    font-size: 14px;
}

@media (max-width: 900px) {
    .grid,
    .grid.two {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 40px;
    }

    .hero-card {
        padding: 42px 28px;
    }

    .nav {
        padding: 0 18px;
    }
}