/* ================= 全局重置 ================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: #ffffff;
    overflow-x: hidden;
}

/* ================= 导航栏 ================= */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #fff;
    padding: 0 40px;
    height: 80px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    position: relative;
    z-index: 1000;
}

.logo img { height: 40px; display: block; }

.nav-links {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 30px;
}

.nav-links > li {
    position: relative;
    height: 80px;
    display: flex;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: #1a2b5c;
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-links a:hover { color: #e66021; }
.nav-links li.active > a { color: #e66021; }
.arrow-icon { font-size: 12px; transition: transform 0.3s; }

.dropdown-menu {
    position: absolute;
    top: 80px;
    left: 0;
    background-color: #fff;
    min-width: 200px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 100;
    border-top: 2px solid #1a2b5c;
}

.dropdown-menu li { height: auto; }

.dropdown-menu a {
    padding: 15px 20px;
    display: block;
    color: #1a2b5c;
    font-size: 15px;
}

.dropdown-menu a:hover { background-color: #f8f9fa; color: #e66021; }

.nav-links li:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-links li:hover .arrow-icon { transform: rotate(180deg); }

.social-icons { display: flex; gap: 15px; font-size: 18px; }
.social-icons a { color: #1a2b5c; transition: color 0.3s; }
.social-icons a:hover { color: #e66021; }

.hamburger {
    display: none;
    font-size: 24px;
    color: #1a2b5c;
    cursor: pointer;
    background: none;
    border: none;
}

/* ================= 按钮通用特效 ================= */
.btn-effect {
    display: inline-block;
    background-color: #1e2b6b;
    color: #ffffff;
    text-decoration: none;
    font-weight: 700;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 0 4px 6px rgba(30, 43, 107, 0.2);
}

.btn-effect:hover {
    background-color: #2a3c8f;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(30, 43, 107, 0.3);
}

.btn-effect:active {
    transform: translateY(-1px);
    box-shadow: 0 5px 10px rgba(30, 43, 107, 0.3);
}

/* ================= 内页 Banner ================= */
.page-banner {
    position: relative;
    background-image: url('https://aimg8.dlssyht.cn/u/2327716/ev_user_module_content_tmp/2026_08_13/tmp1786589568_2327716_s.png');
    background-size: cover;
    background-position: center;
    height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 30, 60, 0.6);
    z-index: 1;
}

.page-banner-content {
    position: relative;
    z-index: 2;
    color: #ffffff;
}

.page-banner-content h1 {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* ================= CTA ================= */
.cta-section {
    position: relative;
    background-image: url('https://aimg8.dlssyht.cn/u/2327716/ev_user_module_content_tmp/2026_08_13/tmp1786588459_2327716_s.png');
    background-size: cover;
    background-position: center;
    padding: 100px 5%;
    text-align: center;
    color: #ffffff;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 35, 70, 0.65);
    z-index: 1;
}

.cta-container {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

.cta-title { font-size: 28px; font-weight: 600; line-height: 1.4; letter-spacing: 1px; }
.cta-btn { font-size: 14px; padding: 16px 32px; letter-spacing: 1px; }

/* ================= Footer ================= */
.footer-section {
    background-color: #ffffff;
    padding: 80px 5% 0 5%;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 40px;
}

.footer-col:first-child { display: flex; flex-direction: column; gap: 40px; }
.footer-logo img { height: 45px; display: block; }
.footer-col h3 { font-size: 20px; color: #1a2b5c; font-weight: 700; margin-bottom: 25px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 15px; }

.footer-col ul li a {
    text-decoration: none;
    color: #444444;
    font-size: 15px;
    transition: color 0.3s;
}

.footer-col ul li a:hover { color: #e66021; }

.footer-contact-info p { font-size: 15px; color: #444444; line-height: 1.8; margin-bottom: 10px; }

.footer-bottom {
    margin-top: 80px;
    border-top: 1px solid #e5e5e5;
    padding: 30px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.footer-copyright { font-size: 14px; color: #555555; }

.footer-social-icons { display: flex; gap: 20px; align-items: center; }

.footer-social-icons a {
    color: #555555;
    font-size: 18px;
    transition: all 0.3s ease;
    text-decoration: none;
}

.footer-social-icons a:hover { color: #e66021; transform: scale(1.2); }

/* ================= 响应式（公共部分） ================= */
@media screen and (max-width: 992px) {
    .navbar { padding: 0 20px; height: 70px; }
    .hamburger { display: block; }
    .social-icons { display: none; }

    .nav-links {
        position: absolute;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: #fff;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 20px 0;
        transition: left 0.3s ease;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        overflow-y: auto;
    }

    .nav-links.active { left: 0; }
    .nav-links > li { width: 100%; height: auto; flex-direction: column; align-items: flex-start; }
    .nav-links a { width: 100%; padding: 15px 20px; justify-content: space-between; }

    .dropdown-menu {
        position: static; opacity: 1; visibility: visible; transform: none;
        box-shadow: none; border-top: none; background-color: #f8f9fa;
        display: none; width: 100%;
    }

    .dropdown-menu li a { padding-left: 40px; }
    .nav-links li.open .dropdown-menu { display: block; }
    .nav-links li.open .arrow-icon { transform: rotate(180deg); }

    .page-banner { height: 280px; }
    .page-banner-content h1 { font-size: 32px; }

    .footer-container { grid-template-columns: 1fr 1fr; gap: 50px; }
}

@media screen and (max-width: 768px) {
    .page-banner { height: 220px; }
    .page-banner-content h1 { font-size: 26px; }

    .cta-section { padding: 60px 20px; }
    .cta-title { font-size: 22px; }
    .cta-btn { padding: 14px 24px; font-size: 13px; }

    .footer-section { padding: 50px 20px 0 20px; }
    .footer-container { grid-template-columns: 1fr; gap: 40px; }
    .footer-bottom { flex-direction: column; gap: 20px; padding: 20px; text-align: center; margin-top: 40px; }
}