:root {
    --color-bg-dark: #0a0a0a;
    --color-bg-card: #1a1a1a;
    --color-gold-primary: #D4AF37;
    --color-gold-hover: #F3E5AB;
    --color-text-main: #E0E0E0;
    --color-text-muted: #888888;
    /* 增加了中文字体族优先级的设定 */
    --font-primary: 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
    --transition-speed: 0.3s;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-dark);
    color: var(--color-text-main);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed) ease;
}

ul {
    list-style: none;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Header & Navigation */
.main-header {
    background-color: rgba(10, 10, 10, 0.95);
    border-bottom: 1px solid rgba(212, 175, 55, 0.2);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-gold-primary);
    letter-spacing: 2px;
}

.nav-list {
    display: flex;
    gap: 30px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-main);
    padding: 10px 0;
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--color-gold-primary);
}

.has-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-bg-card);
    min-width: 180px;
    border: 1px solid rgba(212, 175, 55, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-speed) ease;
}

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

.dropdown-menu li a {
    display: block;
    padding: 12px 20px;
    font-size: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.dropdown-menu li a:hover {
    background-color: rgba(212, 175, 55, 0.1);
    color: var(--color-gold-primary);
}

/* Hero Banner */
.hero-banner {
    height: 600px;
    background: linear-gradient(rgba(10, 10, 10, 0.7), rgba(10, 10, 10, 0.9)), url('../assets/banner-bg.jpg') center/cover no-repeat;
    display: flex;
    align-items: center;
    text-align: center;
    border-bottom: 2px solid var(--color-gold-primary);
}

.hero-content {
    width: 100%;
}

.hero-title {
    font-size: 48px;
    color: var(--color-gold-primary);
    margin-bottom: 20px;
    letter-spacing: 4px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--color-text-main);
    margin-bottom: 40px;
}

.btn-primary {
    display: inline-block;
    padding: 12px 30px;
    background-color: transparent;
    color: var(--color-gold-primary);
    border: 2px solid var(--color-gold-primary);
    font-size: 16px;
    letter-spacing: 1px;
    transition: all var(--transition-speed) ease;
}

.btn-primary:hover {
    background-color: var(--color-gold-primary);
    color: var(--color-bg-dark);
}

/* Core Services Section */
.core-services {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 36px;
    color: var(--color-gold-primary);
    margin-bottom: 50px;
    letter-spacing: 2px;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--color-bg-card);
    border: 1px solid rgba(212, 175, 55, 0.1);
    padding: 25px;
    transition: transform var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-gold-primary);
}

.img-placeholder {
    width: 100%;
    height: 220px;
    background-color: #2a2a2a;
    margin-bottom: 20px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.img-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
    transition: opacity var(--transition-speed) ease;
}

.service-card:hover .img-placeholder img {
    opacity: 0.9;
}

.service-card h3 {
    color: var(--color-gold-primary);
    margin-bottom: 15px;
    font-size: 22px;
}

.service-card p {
    color: var(--color-text-muted);
    margin-bottom: 20px;
    font-size: 15px;
}

.btn-link {
    color: var(--color-gold-hover);
    font-weight: bold;
    font-size: 13px;
    letter-spacing: 1px;
}

.btn-link:hover {
    text-decoration: underline;
}

/* Footer */
.main-footer {
    background-color: var(--color-bg-card);
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid rgba(212, 175, 55, 0.2);
}

.copyright {
    color: var(--color-text-muted);
    font-size: 14px;
    margin-bottom: 10px;
}

.icp-link {
    color: var(--color-text-muted);
    font-size: 14px;
}

.icp-link:hover {
    color: var(--color-gold-primary);
}