/* ===== 导航 ===== */
.navbar {
    background: rgba(10, 17, 30, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(62,146,204,0.25);
    padding: 0 5%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
}
.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}
.nav-logo-icon {
    width: 38px; height: 38px;
    background: linear-gradient(135deg, #3e92cc, #00c9ff);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; font-weight: 900; color: #fff;
    letter-spacing: -1px;
}
.nav-logo-text {
    display: flex; flex-direction: column;
}
.nav-logo-text .cn {
    font-size: 14px; font-weight: 700; color: #fff;
    line-height: 1.2;
}
.nav-logo-text .en-name {
    font-size: 10px; color: #00c9ff; letter-spacing: 1px;
}
.nav-menu {
    display: flex; align-items: center; gap: 6px;
    list-style: none;
}
.nav-menu a {
    color: #9ca3af;
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 14px;
    transition: 0.3s ease;
}
.nav-menu a:hover {
    color: #00c9ff;
    background: rgba(62,146,204,0.1);
}
.nav-right {
    display: flex; align-items: center; gap: 12px;
}
.lang-btn {
    background: rgba(62,146,204,0.15);
    border: 1px solid rgba(62,146,204,0.25);
    color: #00c9ff;
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    transition: 0.3s ease;
}
.lang-btn:hover { background: rgba(62,146,204,0.3); }
.nav-cta {
    background: linear-gradient(135deg, #3e92cc, #00c9ff) !important;
    color: #fff !important;
    padding: 8px 18px !important;
    border-radius: 8px !important;
    font-weight: 600;
    font-size: 13px !important;
    white-space: nowrap;
}
.nav-cta:hover { opacity: 0.9; transform: translateY(-1px); }
.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: 6px;
}
.hamburger span {
    width: 22px; height: 2px;
    background: #e8eaf0;
    border-radius: 2px;
    transition: 0.3s ease;
}

/* ===== 页脚 ===== */
footer {
    background: #060b14;
    padding: 60px 5% 30px;
}
footer .footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 40px;
}
footer h4 { font-size: 16px; color: #00c9ff; margin-bottom: 18px; }
footer p { color: #9ca3af; margin: 8px 0; font-size: 14px; }
footer a { display: block; color: #9ca3af; margin: 8px 0; font-size: 14px; transition: 0.3s ease; }
footer a:hover { color: #00c9ff; }
footer .footer-bottom {
    text-align: center;
    padding-top: 28px;
    border-top: 1px solid rgba(255,255,255,0.06);
    max-width: 1200px;
    margin: 0 auto;
}
footer .footer-bottom p { margin: 0; font-size: 13px; }

/* ===== 中英文切换 ===== */
.en { display: none; }
body.lang-en .zh { display: none; }
body.lang-en .en { display: block; }
body.lang-en .en-inline { display: inline; }
.en-inline { display: none; }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: rgba(10, 17, 30, 0.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 20px;
        gap: 8px;
        border-top: 1px solid rgba(62,146,204,0.25);
    }
    .nav-menu.open { display: flex; }
    .hamburger { display: flex; }
}
@media (max-width: 600px) {
    .nav-logo-text { display: none; }
}