/* 
   KY开元(集团)有限公司 - 官方网站样式表
   配色：淡黑金 (Pale Black Gold)
   背景: #121212, #1a1a1a
   文字: #e0e0e0, #c5a059 (金)
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600&family=Playfair+Display:wght@700&display=swap');

:root {
    --bg-dark: #121212;
    --bg-card: #1a1a1a;
    --gold-primary: #c5a059;
    --gold-light: #e6d5b8;
    --text-white: #f8f9fa;
    --text-muted: #a0a0a0;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4 {
    font-family: 'Playfair Display', serif;
    color: var(--gold-primary);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
    cursor: pointer;
}

/* Scroll Animation Class */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Layout Components */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    letter-spacing: 2px;
}

.section-title .divider {
    width: 60px;
    height: 3px;
    background: var(--gold-primary);
    margin: 0 auto;
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(18, 18, 18, 0.95);
    border-bottom: 1px solid rgba(197, 160, 89, 0.2);
    z-index: 1000;
    padding: 15px 0;
    transition: var(--transition);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gold-primary);
    letter-spacing: 1px;
}

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

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

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://tse-mm.bing.com/th?q=Corporate+Building+Luxury') center/cover;
    position: relative;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--gold-light);
    margin-bottom: 30px;
}

.btn-gold {
    display: inline-block;
    padding: 12px 35px;
    background: transparent;
    border: 2px solid var(--gold-primary);
    color: var(--gold-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
}

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

/* Stats Section */
.stats {
    padding: 80px 0;
    background: var(--bg-card);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
}

.stat-item h3 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

/* News Grid */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.news-card {
    background: var(--bg-card);
    border: 1px solid rgba(197, 160, 89, 0.1);
    overflow: hidden;
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-10px);
    border-color: var(--gold-primary);
}

.news-img {
    height: 200px;
    background-size: cover;
    background-position: center;
}

.news-content {
    padding: 20px;
}

.news-date {
    color: var(--gold-primary);
    font-size: 0.8rem;
    margin-bottom: 10px;
}

/* Footer */
footer {
    background: #0a0a0a;
    padding: 80px 0 20px;
    border-top: 1px solid rgba(197, 160, 89, 0.1);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.05);
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Floating Elements */
.service-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--gold-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    z-index: 1001;
}

/* Product Filter Styles */
.filter-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 40px;
    justify-content: center;
}

.filter-item select, .filter-item input {
    background: var(--bg-card);
    color: var(--text-white);
    border: 1px solid var(--gold-primary);
    padding: 10px 15px;
    outline: none;
}

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

.product-card {
    background: var(--bg-card);
    border: 1px solid rgba(197, 160, 89, 0.1);
    padding: 20px;
    text-align: center;
}

/* Responsive Mobile Navigation */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }
}