/* 配色与变量 */
:root {
    --gold: #c5a059;       /* 柔和的金，代表高价值 */
    --earth-dark: #1a1b1e; /* 极深灰，代表专业稳重 */
    --earth-light: #fdfdfd;
    --accent: #eee;
}

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    color: #333;
    line-height: 1.8;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 25px;
}

.flex-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 导航 */
.navbar {
    height: 90px;
    position: fixed;
    width: 100%;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.logo {
    font-family: 'Cinzel', serif;
    font-size: 24px;
    font-weight: 700;
    color: var(--earth-dark);
}

.logo span {
    font-family: 'Noto Sans SC';
    font-size: 14px;
    display: block;
    letter-spacing: 4px;
    color: var(--gold);
    margin-top: -5px;
}

.nav-links {
    list-style: none;
    display: flex;
}

.nav-links li { margin-left: 40px; }

.nav-links a {
    text-decoration: none;
    color: #555;
    font-size: 15px;
    font-weight: 500;
    transition: 0.3s;
}

.nav-links a:hover { color: var(--gold); }

.btn-cta {
    background: var(--earth-dark);
    color: #fff !important;
    padding: 10px 25px;
    border-radius: 50px;
}

/* 英雄区 */
.hero {
    height: 100vh;
    background: url('https://images.unsplash.com') center/cover;
    display: flex;
    align-items: center;
    position: relative;
    color: white;
}

.overlay {
    position: absolute;
    top:0; left:0; width:100%; height:100%;
    background: linear-gradient(to right, rgba(0,0,0,0.8), transparent);
}

.hero-content {
    position: relative;
    z-index: 2;
    padding-left: 5%;
}

.hero-content h1 {
    font-size: 4.5rem;
    margin-bottom: 20px;
    font-weight: 700;
    line-height: 1.1;
}

.sub-title {
    color: var(--gold);
    letter-spacing: 5px;
    margin-bottom: 10px;
}

.btn-group {
    margin-top: 40px;
}

.btn-main {
    padding: 15px 45px;
    background: var(--gold);
    color: #fff;
    text-decoration: none;
    margin-right: 20px;
    font-weight: bold;
}

.btn-line {
    padding: 15px 45px;
    border: 1px solid #fff;
    color: #fff;
    text-decoration: none;
}

/* 产品区 */
.section { padding: 120px 0; background: #fff; }

.section-header { margin-bottom: 60px; }

.section-header .label {
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 3px;
    font-size: 14px;
}

.section-header h2 { font-size: 36px; margin-top: 10px; color: var(--earth-dark); }

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.card {
    background: var(--earth-light);
    border: 1px solid #eee;
    transition: 0.4s;
}

.card:hover {
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
    transform: translateY(-5px);
}

.card-img {
    height: 300px;
    background-size: cover;
    background-position: center;
}

.card-body { padding: 35px; }

.card-body h3 { margin-bottom: 15px; font-size: 22px; }

.card-body ul {
    margin-top: 15px;
    list-style: none;
    color: #777;
    font-size: 14px;
}

.card-body ul li::before {
    content: "•";
    color: var(--gold);
    margin-right: 8px;
}

/* 数据区 */
.stats {
    background: var(--earth-dark);
    color: #fff;
    padding: 80px 0;
}

.stat-item { text-align: center; }

.stat-item .num {
    font-size: 45px;
    font-weight: 700;
    color: var(--gold);
    font-family: 'Cinzel', serif;
}

.stat-item .lab { font-size: 14px; color: #888; margin-top: 5px; }

/* 页脚 */
footer {
    background: #111;
    color: #888;
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-bottom: 1px solid #222;
    padding-bottom: 50px;
}

.footer-brand h3 { color: #fff; letter-spacing: 2px; margin-bottom: 20px; }

.footer-contact p { margin-bottom: 10px; }

.copyright {
    text-align: center;
    padding-top: 30px;
    font-size: 12px;
}

@media (max-width: 768px) {
    .hero-content h1 { font-size: 2.5rem; }
    .footer-content { grid-template-columns: 1fr; gap: 40px; }
}