:root {
    --primary-color: #B9975B; /* 优雅暗金 */
    --light-bg: #FFFFFF;      /* 白色背景 */
    --card-bg: #FFFFFF;       /* 卡片背景 */
    --text-color: #333333;    /* 主要文字颜色 (深灰) */
    --text-secondary: #6c757d;/* 次要文字颜色 (中灰) */
    --border-color: #DEE2E6;  /* 边框颜色 (浅灰) */
    --shadow-color: rgba(0, 0, 0, 0.08); /* 投影颜色 */
}

@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif;
    background-color: var(--light-bg);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.8;
    overflow-x: hidden;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; opacity: 0; transform: translateY(30px); transition: opacity 0.8s ease, transform 0.8s ease; }
.section.visible { opacity: 1; transform: translateY(0); }
.section-title { text-align: center; font-size: 2.5rem; font-weight: 600; margin-bottom: 20px; color: var(--text-color); }
.section-subtitle { text-align: center; font-size: 1.1rem; color: var(--text-secondary); max-width: 700px; margin: 0 auto 60px auto; }

.navbar {
    position: fixed; width: 100%; top: 0; left: 0;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px); z-index: 1000;
    padding: 15px 0; border-bottom: 1px solid var(--border-color);
}
.nav-container { display: flex; justify-content: space-between; align-items: center; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.nav-logo { display: flex; align-items: center; text-decoration: none; }
.nav-logo img { height: 40px; }
.nav-logo span { color: var(--primary-color); }
.nav-menu { list-style: none; display: flex; align-items: center; gap: 35px; margin: 0; padding: 0; }
.nav-item a { color: var(--text-color); text-decoration: none; font-size: 1rem; transition: color 0.3s ease; padding: 10px 0; }
.nav-item > a:hover, .dropdown-menu li a:hover { color: var(--primary-color); }
.nav-item.dropdown { position: relative; }
.dropdown-menu {
    display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
    background-color: var(--light-bg); border: 1px solid var(--border-color);
    border-radius: 8px; padding: 10px 0; list-style: none; min-width: 160px;
    box-shadow: 0 8px 25px var(--shadow-color); margin-top: 10px;
    opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease;
}
.nav-item.dropdown:hover .dropdown-menu { display: block; opacity: 1; visibility: visible; }
.dropdown-menu li a { display: block; padding: 10px 20px; white-space: nowrap; }
.nav-actions .btn { margin-left: 15px; }
.hamburger { display: none; cursor: pointer; }
.hamburger div { width: 25px; height: 3px; background-color: var(--text-color); margin: 5px 0; transition: 0.4s; }

.btn {
    padding: 12px 30px; border-radius: 6px; text-decoration: none;
    font-weight: 500; transition: all 0.3s ease; display: inline-block; font-size: 1rem;
}
.btn-primary { background-color: var(--primary-color); color: #fff; border: 1px solid var(--primary-color); }
.btn-primary:hover { background-color: #a5844b; border-color: #a5844b; transform: translateY(-2px); }
.btn-secondary { background-color: transparent; border: 1px solid var(--primary-color); color: var(--primary-color); }
.btn-secondary:hover { background-color: var(--primary-color); color: #fff; }

.hero { height: 100vh; display: flex; align-items: center; text-align: center; position: relative; overflow: hidden; background-color: #333; }
.hero video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}
.hero-content { position: relative; z-index: 2; width: 100%; animation: fadeInUp 1s ease-out; }
.hero h1 { font-size: 3.8rem; font-weight: 700; margin-bottom: 20px; color: #fff; }
.hero p { font-size: 1.3rem; max-width: 750px; margin: 0 auto 40px auto; color: #fff; }

.steps-container { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.step-card {
    background-color: #F8F9FA; padding: 40px; border-radius: 8px; text-align: center;
    border: 1px solid var(--border-color); transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.step-card:hover { transform: translateY(-8px); box-shadow: 0 10px 30px var(--shadow-color); }
.step-icon { height: 60px; margin-bottom: 20px; display: flex; align-items: center; justify-content: center; }
.step-card h3 { font-size: 1.5rem; margin-bottom: 15px; color: var(--text-color); }

.professional-section {
    background-color: #F8F9FA; border-radius: 8px; padding: 60px;
    display: flex; align-items: center; gap: 50px; border: 1px solid var(--border-color);
}
.professional-logo { font-size: 4rem; font-weight: bold; color: var(--primary-color); line-height: 1; text-align: center; }
.professional-logo span { font-size: 1rem; display: block; color: var(--text-color); font-weight: normal; letter-spacing: 1px; }
.professional-content h2 { font-size: 2.2rem; margin-top: 0; margin-bottom: 20px; color: var(--text-color); }

.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.news-card {
    display: block; text-decoration: none; background-color: var(--card-bg); border-radius: 8px;
    overflow: hidden; border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.news-card:hover { transform: translateY(-8px); box-shadow: 0 10px 30px var(--shadow-color); }
.news-card-image-wrapper { height: 200px; background-color: #E9ECEF; display: flex; align-items: center; justify-content: center; }
.news-card-image-wrapper img { width: 100%; height: 100%; object-fit: cover; }
.news-card-content { padding: 25px; }
.news-card-category {
    display: inline-block; background-color: rgba(185, 151, 91, 0.1); color: var(--primary-color);
    padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; margin-bottom: 15px;
}
.news-card-title { font-size: 1.25rem; color: var(--text-color); margin: 0 0 10px 0; line-height: 1.4; }
.news-card-excerpt { font-size: 0.95rem; color: var(--text-secondary); margin: 0 0 20px 0; }
.news-card-meta { font-size: 0.85rem; color: #8a8fb8; }
.view-more-container { text-align: center; margin-top: 60px; }

.cta-section { text-align: center; }
.cta-section .btn-primary { padding: 18px 40px; font-size: 1.2rem; }

.footer { background-color: #F8F9FA; padding: 50px 0; text-align: center; border-top: 1px solid var(--border-color); }
.footer-nav { margin-bottom: 20px; }
.footer-nav a { color: var(--text-secondary); text-decoration: none; margin: 0 15px; transition: color 0.3s ease; }
.footer-nav a:hover { color: var(--primary-color); }
.footer-copyright { color: #6c757d; }

@media (max-width: 992px) { 
    .nav-menu { display: none; flex-direction: column; width: 100%; background-color: var(--light-bg); position: absolute; top: 70px; left: 0; padding: 20px 0; border-top: 1px solid var(--border-color); }
    .nav-menu.active { display: flex; }
    .hamburger { display: block; }
    .news-grid { grid-template-columns: repeat(2, 1fr); } 
    .professional-section { flex-direction: column; text-align: center; } 
}
@media (max-width: 768px) { .section-title { font-size: 2rem; } .hero h1 { font-size: 2.8rem; } .hero p { font-size: 1.1rem; } .steps-container, .news-grid { grid-template-columns: 1fr; } .professional-section { padding: 40px 20px; } }