/* 变量定义 */
:root {
    --primary-black: #121212;
    --accent-gold: #b08d57;
    --text-gray: #a0a0a0;
    --bg-white: #ffffff;
    --bg-light: #f8f8f8;
    
    /* 宝石色块颜色 */
    --gem-emerald: linear-gradient(135deg, #065f46 0%, #10b981 100%);
    --gem-ruby: linear-gradient(135deg, #991b1b 0%, #ef4444 100%);
    --gem-aqua: linear-gradient(135deg, #0e7490 0%, #67e8f9 100%);
    --gem-tourmaline: linear-gradient(135deg, #db2777 0%, #10b981 100%);
}

/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--primary-black);
    background-color: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, .logo {
    font-family: 'Cinzel', serif;
    letter-spacing: 2px;
}

a { text-decoration: none; transition: 0.3s; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

/* 导航 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 0;
    background: rgba(255,255,255,0.95);
    z-index: 1000;
}

.logo { font-size: 1.5rem; font-weight: 700; color: var(--primary-black); }

.nav-links a {
    color: var(--primary-black);
    margin-left: 2rem;
    font-size: 0.9rem;
    text-transform: uppercase;
}

.nav-contact {
    background: var(--primary-black);
    color: #fff !important;
    padding: 0.5rem 1.2rem;
}

.nav-contact:hover { background: var(--accent-gold); }

/* 英雄区 */
.hero {
    padding: 100px 5%;
    text-align: center;
    background-color: var(--bg-light);
}

.hero-inner { max-width: 800px; margin: 0 auto; }

.tagline { color: var(--accent-gold); text-transform: uppercase; font-weight: 600; letter-spacing: 3px; font-size: 0.8rem; }

.hero h1 { font-size: 3.5rem; margin: 1.5rem 0; }

.hero p { font-size: 1.2rem; color: #555; margin-bottom: 2rem; }

.hero-btns { display: flex; justify-content: center; gap: 20px; }

/* 按钮 */
.btn-primary { background: var(--primary-black); color: #fff; padding: 1rem 2rem; }
.btn-secondary { border: 1px solid var(--primary-black); color: var(--primary-black); padding: 1rem 2rem; }
.btn-primary:hover { background: var(--accent-gold); }
.btn-secondary:hover { background: #eee; }

/* 宝石展示 */
.collection { padding: 80px 0; }

.section-heading { text-align: center; margin-bottom: 50px; font-size: 2rem; }

.gem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.gem-card {
    border: 1px solid #eee;
    transition: transform 0.3s ease;
}

.gem-card:hover { transform: translateY(-5px); border-color: var(--accent-gold); }

.gem-visual {
    height: 300px;
    display: flex;
    align-items: flex-end;
    padding: 15px;
}

.gem-label {
    background: rgba(255,255,255,0.8);
    padding: 4px 10px;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 宝石背景色块 */
.emerald-bg { background: var(--gem-emerald); }
.ruby-bg { background: var(--gem-ruby); }
.aqua-bg { background: var(--gem-aqua); }
.tourmaline-bg { background: var(--gem-tourmaline); }

.gem-meta { padding: 20px; text-align: center; }

.gem-meta h3 { font-size: 1.1rem; margin-bottom: 10px; }

.gem-meta p { color: var(--text-gray); font-size: 0.85rem; margin-bottom: 15px; }

.btn-buy {
    display: block;
    padding: 10px;
    border: 1px solid var(--primary-black);
    color: var(--primary-black);
    font-size: 0.8rem;
    text-transform: uppercase;
}

.btn-buy:hover { background: var(--primary-black); color: #fff; }

/* 产地介绍 */
.provenance { padding: 100px 0; background: var(--primary-black); color: #fff; }

.flex-box { display: flex; align-items: center; gap: 60px; }

.text-content { flex: 1; }

.text-content h2 { font-size: 2.5rem; margin-bottom: 20px; }

.text-content p { margin-bottom: 1.5rem; color: #ccc; }

.visual-content { flex: 1; }

.map-placeholder {
    height: 400px;
    border: 1px solid #333;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #1a1a1a;
    color: #444;
    letter-spacing: 5px;
    font-weight: 700;
}

.btn-outline {
    display: inline-block;
    padding: 10px 30px;
    border: 1px solid var(--accent-gold);
    color: var(--accent-gold);
    margin-top: 20px;
}

.btn-outline:hover { background: var(--accent-gold); color: #fff; }

/* 页脚 */
footer { padding: 50px 0; border-top: 1px solid #eee; text-align: center; font-size: 0.8rem; }
footer a { color: var(--accent-gold); }

/* 响应式 */
@media (max-width: 768px) {
    .flex-box { flex-direction: column; }
    .hero h1 { font-size: 2.5rem; }
}