:root {
    --nav-bg: #000;
    --nav-text: #fff;
    --nav-muted: #9aa3b2;
    --nav-pink: #ff2d9b;
    --nav-pink-2: #e91e8c;
    --nav-card: #2a3140;
    --nav-card-hover: #353e50;
    --nav-line: #3a4254;
    --nav-max: 420px;
}

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

html { scroll-behavior: smooth; }

body.nav-page {
    font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
    background: var(--nav-bg);
    color: var(--nav-text);
    line-height: 1.6;
    min-height: 100vh;
    padding-bottom: 88px;
}

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

.nav-wrap {
    width: min(var(--nav-max), calc(100% - 28px));
    margin: 0 auto;
    padding: 28px 0 24px;
}

.nav-hero {
    text-align: center;
    margin-bottom: 28px;
}

.nav-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
}

.nav-logo img {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: block;
}

.nav-domains {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-align: left;
}

.nav-slogan {
    font-size: clamp(1.05rem, 4vw, 1.25rem);
    font-weight: 700;
    margin-bottom: 8px;
}

.nav-sub {
    color: var(--nav-muted);
    font-size: 0.92rem;
}

.nav-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 8px 0 18px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--nav-muted);
}

.nav-divider::before,
.nav-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--nav-line);
}

.nav-divider span { white-space: nowrap; }

.route-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.route-btn {
    display: block;
    text-align: center;
    padding: 14px 16px;
    border-radius: 14px;
    font-size: 1.02rem;
    font-weight: 700;
    transition: transform 0.15s ease, filter 0.15s ease;
}

.route-btn:active { transform: scale(0.98); }

.route-btn.is-primary {
    background: linear-gradient(180deg, var(--nav-pink), var(--nav-pink-2));
    color: #fff;
    box-shadow: 0 8px 24px -12px rgba(255, 45, 155, 0.7);
}

.route-btn.is-secondary {
    background: var(--nav-card);
    color: #fff;
}

.route-btn.is-secondary:hover { background: var(--nav-card-hover); }

.nav-mail {
    text-align: center;
    margin: 28px 0 8px;
}

.nav-mail p {
    font-size: 0.88rem;
    color: #d7dbe3;
    margin-bottom: 12px;
}

.mail-btn {
    display: inline-block;
    padding: 12px 22px;
    border-radius: 999px;
    background: linear-gradient(180deg, var(--nav-pink), var(--nav-pink-2));
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    box-shadow: 0 8px 24px -12px rgba(255, 45, 155, 0.7);
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.quick-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 86px;
    padding: 12px 6px;
    border-radius: 14px;
    background: var(--nav-card);
    text-align: center;
    transition: background 0.15s ease;
}

.quick-item:hover { background: var(--nav-card-hover); }

.quick-item .icon {
    font-size: 1.35rem;
    line-height: 1;
}

.quick-item .label {
    font-size: 0.78rem;
    color: #e8ecf4;
    line-height: 1.25;
}

.nav-footer {
    margin-top: 36px;
    text-align: center;
    color: var(--nav-muted);
    font-size: 0.75rem;
}

.nav-footer p + p { margin-top: 8px; }

@media (max-width: 380px) {
    .quick-grid { grid-template-columns: repeat(3, 1fr); }
}