/* ============================================
   上海高端大圈品茶工作室 - 黑金主题样式
   版本: 1.0
   描述: 极致黑金配色，奢华大气，现代扁平化+微交互
   ============================================ */

/* ===== CSS Variables ===== */
:root {
    --gold-primary: #D4AF37;
    --gold-light: #F5D77A;
    --gold-dark: #B8960C;
    --gold-gradient: linear-gradient(135deg, #D4AF37 0%, #F5D77A 50%, #B8960C 100%);
    --gold-text-gradient: linear-gradient(135deg, #F5D77A, #D4AF37, #B8960C);
    
    --black-deep: #0A0A0A;
    --black-primary: #111111;
    --black-secondary: #1A1A1A;
    --black-card: #161616;
    --black-hover: #222222;
    
    --gray-dark: #2A2A2A;
    --gray-mid: #3A3A3A;
    --gray-text: #888888;
    --gray-light: #CCCCCC;
    
    --white: #FFFFFF;
    --white-soft: #F0E6D3;
    
    --font-primary: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --container-width: 1200px;
    --section-padding: 80px 0;
    --card-radius: 12px;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --shadow-gold: 0 0 30px rgba(212, 175, 55, 0.15);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 12px 48px rgba(212, 175, 55, 0.2);
}

/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-primary);
    background-color: var(--black-deep);
    color: var(--gray-light);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--gold-primary); text-decoration: none; transition: color var(--transition-normal); }
a:hover { color: var(--gold-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* ===== Utility Classes ===== */
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 20px; }
.gold-text {
    background: var(--gold-text-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.section-title { text-align: center; margin-bottom: 60px; }
.section-title h2 {
    font-size: 2.5rem; font-weight: 700; margin-bottom: 15px;
    background: var(--gold-text-gradient);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.section-title .divider { width: 80px; height: 3px; background: var(--gold-gradient); margin: 0 auto 15px; border-radius: 2px; }
.section-title p { color: var(--gray-text); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }
.btn-gold {
    display: inline-block; padding: 14px 40px; background: var(--gold-gradient); color: var(--black-deep);
    font-weight: 600; font-size: 1rem; border: none; border-radius: 50px; cursor: pointer;
    transition: all var(--transition-normal); text-decoration: none;
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); color: var(--black-deep); }
.btn-outline {
    display: inline-block; padding: 14px 40px; background: transparent; color: var(--gold-primary);
    font-weight: 600; font-size: 1rem; border: 2px solid var(--gold-primary); border-radius: 50px;
    cursor: pointer; transition: all var(--transition-normal); text-decoration: none;
}
.btn-outline:hover { background: var(--gold-primary); color: var(--black-deep); transform: translateY(-2px); }

/* ===== Header ===== */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(10, 10, 10, 0.95); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(212, 175, 55, 0.1); transition: all var(--transition-normal);
}
.header.scrolled { background: rgba(10, 10, 10, 0.98); box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5); }
.header-inner {
    display: flex; align-items: center; justify-content: space-between; height: 80px;
    max-width: var(--container-width); margin: 0 auto; padding: 0 20px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo svg { height: 45px; width: auto; }
.logo-text {
    font-size: 1.3rem; font-weight: 700;
    background: var(--gold-text-gradient);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    letter-spacing: 2px;
}
.nav-menu { display: flex; align-items: center; gap: 5px; }
.nav-menu a {
    padding: 10px 20px; color: var(--gray-light); font-size: 0.95rem; font-weight: 500;
    border-radius: 8px; transition: all var(--transition-normal); position: relative;
}
.nav-menu a::after {
    content: ''; position: absolute; bottom: 5px; left: 50%; transform: translateX(-50%);
    width: 0; height: 2px; background: var(--gold-primary); transition: width var(--transition-normal); border-radius: 1px;
}
.nav-menu a:hover, .nav-menu a.active { color: var(--gold-primary); }
.nav-menu a:hover::after, .nav-menu a.active::after { width: 30px; }
.menu-toggle {
    display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 10px; z-index: 1001;
}
.menu-toggle span { width: 25px; height: 2px; background: var(--gold-primary); transition: all var(--transition-normal); border-radius: 1px; }
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Hero ===== */
.hero {
    position: relative; height: 100vh; min-height: 600px;
    display: flex; align-items: center; justify-content: center; overflow: hidden; background: var(--black-deep);
}
.hero-bg {
    position: absolute; inset: 0; z-index: 1;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(212, 175, 55, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(212, 175, 55, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 0%, rgba(212, 175, 55, 0.03) 0%, transparent 60%);
}
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 800px; padding: 0 20px; }
.hero-logo { margin-bottom: 40px; animation: fadeInDown 1s ease; }
.hero-logo svg { height: 80px; width: auto; margin: 0 auto; }
.hero-content h1 {
    font-size: 3.5rem; font-weight: 800; margin-bottom: 20px;
    background: var(--gold-text-gradient);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    letter-spacing: 4px; animation: fadeInUp 1s ease 0.2s both;
}
.hero-content .subtitle {
    font-size: 1.3rem; color: var(--gray-text); margin-bottom: 40px; letter-spacing: 3px;
    animation: fadeInUp 1s ease 0.4s both;
}
.hero-buttons { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; animation: fadeInUp 1s ease 0.6s both; }
.scroll-indicator {
    position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); z-index: 2; animation: bounce 2s infinite;
}
.scroll-indicator span {
    display: block; width: 24px; height: 24px; border-right: 2px solid var(--gold-primary);
    border-bottom: 2px solid var(--gold-primary); transform: rotate(45deg); opacity: 0.5;
}
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-15px); }
    60% { transform: translateX(-50%) translateY(-7px); }
}

/* ===== Services ===== */
.services { padding: var(--section-padding); background: var(--black-primary); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.service-card {
    background: var(--black-card); border: 1px solid rgba(212, 175, 55, 0.1);
    border-radius: var(--card-radius); padding: 40px 30px; text-align: center;
    transition: all var(--transition-normal); position: relative; overflow: hidden;
}
.service-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--gold-gradient); transform: scaleX(0); transition: transform var(--transition-normal);
}
.service-card:hover { transform: translateY(-8px); border-color: rgba(212, 175, 55, 0.3); box-shadow: var(--shadow-gold); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
    width: 70px; height: 70px; margin: 0 auto 25px; background: rgba(212, 175, 55, 0.1);
    border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 2rem;
    transition: all var(--transition-normal);
}
.service-card:hover .service-icon { background: rgba(212, 175, 55, 0.2); transform: scale(1.1); }
.service-card h3 { font-size: 1.3rem; color: var(--gold-primary); margin-bottom: 15px; }
.service-card p { color: var(--gray-text); font-size: 0.95rem; line-height: 1.8; }

/* ===== Articles Grid ===== */
.articles { padding: var(--section-padding); background: var(--black-deep); }
.articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.article-card {
    background: var(--black-card); border: 1px solid rgba(212, 175, 55, 0.08);
    border-radius: var(--card-radius); overflow: hidden; transition: all var(--transition-normal);
}
.article-card:hover { transform: translateY(-5px); border-color: rgba(212, 175, 55, 0.25); box-shadow: var(--shadow-card); }
.article-card-image {
    width: 100%; height: 200px;
    background: linear-gradient(135deg, var(--black-secondary), var(--gray-dark));
    display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden;
}
.article-card-image::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(10, 10, 10, 0.8), transparent);
}
.article-card-image .placeholder-icon { font-size: 3rem; opacity: 0.3; z-index: 1; }
.article-card-body { padding: 25px; }
.article-card-body .category-tag {
    display: inline-block; padding: 4px 12px; background: rgba(212, 175, 55, 0.1);
    color: var(--gold-primary); font-size: 0.8rem; border-radius: 20px; margin-bottom: 12px;
}
.article-card-body h3 {
    font-size: 1.15rem; color: var(--white); margin-bottom: 10px; line-height: 1.5;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.article-card-body h3 a:hover { color: var(--gold-light); }
.article-card-body p {
    color: var(--gray-text); font-size: 0.9rem; line-height: 1.7;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 15px;
}
.article-card-body .read-more { color: var(--gold-primary); font-size: 0.9rem; font-weight: 500; display: inline-flex; align-items: center; gap: 5px; }
.article-card-body .read-more:hover { gap: 10px; }

/* ===== Article Detail ===== */
.article-detail { padding: 120px 0 80px; min-height: 100vh; background: var(--black-deep); }
.article-container { max-width: 850px; margin: 0 auto; padding: 0 20px; }
.article-breadcrumb { margin-bottom: 30px; font-size: 0.9rem; color: var(--gray-text); }
.article-breadcrumb a { color: var(--gold-primary); }
.article-breadcrumb span { margin: 0 8px; color: var(--gray-mid); }
.article-header { margin-bottom: 40px; padding-bottom: 30px; border-bottom: 1px solid rgba(212, 175, 55, 0.15); }
.article-header h1 {
    font-size: 2.2rem; font-weight: 700; margin-bottom: 20px;
    background: var(--gold-text-gradient);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1.4;
}
.article-meta { display: flex; gap: 25px; flex-wrap: wrap; color: var(--gray-text); font-size: 0.9rem; }
.article-meta span { display: flex; align-items: center; gap: 5px; }
.article-content { font-size: 1.05rem; line-height: 2; color: var(--gray-light); }
.article-content h2 {
    font-size: 1.6rem; color: var(--gold-primary); margin: 40px 0 20px;
    padding-left: 15px; border-left: 3px solid var(--gold-primary);
}
.article-content h3 { font-size: 1.3rem; color: var(--gold-light); margin: 30px 0 15px; }
.article-content p { margin-bottom: 20px; text-align: justify; }
.article-content .image-placeholder {
    width: 100%; height: 300px;
    background: linear-gradient(135deg, var(--black-secondary), var(--gray-dark));
    border-radius: 8px; display: flex; align-items: center; justify-content: center;
    margin: 30px 0; border: 1px solid rgba(212, 175, 55, 0.1); color: var(--gray-text); font-size: 0.9rem;
}
.article-content ul, .article-content ol { margin: 20px 0; padding-left: 30px; }
.article-content li { margin-bottom: 10px; }
.article-content ul li { list-style: disc; }
.article-content ol li { list-style: decimal; }
.article-content blockquote {
    margin: 30px 0; padding: 20px 30px; background: rgba(212, 175, 55, 0.05);
    border-left: 4px solid var(--gold-primary); border-radius: 0 8px 8px 0;
    color: var(--gold-light); font-style: italic;
}
.article-nav {
    display: flex; justify-content: space-between; margin-top: 50px; padding-top: 30px;
    border-top: 1px solid rgba(212, 175, 55, 0.1); gap: 20px;
}
.article-nav a {
    display: flex; flex-direction: column; padding: 15px 20px; background: var(--black-card);
    border: 1px solid rgba(212, 175, 55, 0.1); border-radius: 8px; transition: all var(--transition-normal); flex: 1;
}
.article-nav a:hover { border-color: rgba(212, 175, 55, 0.3); }
.article-nav .nav-label { font-size: 0.8rem; color: var(--gold-primary); margin-bottom: 5px; }
.article-nav .nav-title { font-size: 0.95rem; color: var(--gray-light); }

/* ===== Category Page ===== */
.category-page { padding: 120px 0 80px; min-height: 100vh; background: var(--black-deep); }
.category-hero {
    text-align: center; margin-bottom: 60px; padding: 60px 20px;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.05), transparent);
    border-radius: var(--card-radius); border: 1px solid rgba(212, 175, 55, 0.1);
}
.category-hero h1 {
    font-size: 2.5rem; font-weight: 700; margin-bottom: 15px;
    background: var(--gold-text-gradient);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.category-hero p { color: var(--gray-text); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }
.article-list { display: flex; flex-direction: column; gap: 25px; }
.article-list-item {
    display: flex; gap: 30px; background: var(--black-card);
    border: 1px solid rgba(212, 175, 55, 0.08); border-radius: var(--card-radius);
    overflow: hidden; transition: all var(--transition-normal);
}
.article-list-item:hover { border-color: rgba(212, 175, 55, 0.25); box-shadow: var(--shadow-card); transform: translateX(5px); }
.article-list-image {
    width: 280px; min-height: 200px;
    background: linear-gradient(135deg, var(--black-secondary), var(--gray-dark));
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.article-list-image .placeholder-icon { font-size: 3rem; opacity: 0.3; }
.article-list-body { padding: 25px 25px 25px 0; display: flex; flex-direction: column; justify-content: center; }
.article-list-body .category-tag {
    display: inline-block; width: fit-content; padding: 4px 12px; background: rgba(212, 175, 55, 0.1);
    color: var(--gold-primary); font-size: 0.8rem; border-radius: 20px; margin-bottom: 12px;
}
.article-list-body h3 { font-size: 1.3rem; color: var(--white); margin-bottom: 10px; line-height: 1.5; }
.article-list-body h3 a:hover { color: var(--gold-light); }
.article-list-body .excerpt {
    color: var(--gray-text); font-size: 0.95rem; line-height: 1.8; margin-bottom: 15px;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.article-list-body .meta { color: var(--gray-text); font-size: 0.85rem; }

/* ===== Contact Page ===== */
.contact-section { padding: 120px 0 80px; background: var(--black-deep); min-height: 100vh; }
.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; margin-top: 50px; }
.contact-info-card {
    background: var(--black-card); border: 1px solid rgba(212, 175, 55, 0.1);
    border-radius: var(--card-radius); padding: 40px; text-align: center; transition: all var(--transition-normal);
}
.contact-info-card:hover { border-color: rgba(212, 175, 55, 0.3); box-shadow: var(--shadow-gold); transform: translateY(-5px); }
.contact-info-card .icon {
    width: 80px; height: 80px; margin: 0 auto 20px; background: rgba(212, 175, 55, 0.1);
    border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 2.5rem;
}
.contact-info-card h3 { color: var(--gold-primary); font-size: 1.2rem; margin-bottom: 10px; }
.contact-info-card p { color: var(--gray-text); font-size: 1.1rem; margin-bottom: 15px; }
.contact-info-card .copy-btn {
    padding: 8px 24px; background: rgba(212, 175, 55, 0.15); color: var(--gold-primary);
    border: 1px solid rgba(212, 175, 55, 0.3); border-radius: 25px; cursor: pointer;
    font-size: 0.9rem; transition: all var(--transition-normal);
}
.contact-info-card .copy-btn:hover { background: rgba(212, 175, 55, 0.25); }

/* ===== Floating Contact Bar ===== */
.floating-bar { position: fixed; bottom: 30px; right: 30px; z-index: 999; display: flex; flex-direction: column; gap: 12px; }
.floating-btn {
    width: 56px; height: 56px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; cursor: pointer; transition: all var(--transition-normal); border: none; position: relative;
}
.floating-btn:hover { transform: scale(1.15); }
.floating-btn.phone { background: var(--gold-gradient); color: var(--black-deep); box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3); }
.floating-btn.phone:hover { box-shadow: 0 6px 25px rgba(212, 175, 55, 0.5); }
.floating-btn.wechat { background: #07C160; color: white; box-shadow: 0 4px 15px rgba(7, 193, 96, 0.3); }
.floating-btn.wechat:hover { box-shadow: 0 6px 25px rgba(7, 193, 96, 0.5); }
.floating-btn.qq { background: #12B7F5; color: white; box-shadow: 0 4px 15px rgba(18, 183, 245, 0.3); }
.floating-btn.qq:hover { box-shadow: 0 6px 25px rgba(18, 183, 245, 0.5); }
.floating-btn.copy-qq { background: var(--gold-gradient); color: var(--black-deep); box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3); }
.floating-btn .tooltip {
    position: absolute; right: 70px; white-space: nowrap; background: var(--black-card);
    color: var(--gray-light); padding: 8px 16px; border-radius: 8px; font-size: 0.85rem;
    opacity: 0; pointer-events: none; transition: all var(--transition-normal);
    border: 1px solid rgba(212, 175, 55, 0.2);
}
.floating-btn .tooltip::after {
    content: ''; position: absolute; right: -6px; top: 50%; transform: translateY(-50%);
    border: 6px solid transparent; border-left-color: var(--black-card);
}
.floating-btn:hover .tooltip { opacity: 1; right: 65px; }

/* ===== Toast ===== */
.toast {
    position: fixed; top: 100px; left: 50%; transform: translateX(-50%) translateY(-20px);
    background: var(--black-card); color: var(--gold-primary); padding: 14px 30px;
    border-radius: 50px; font-size: 0.95rem; font-weight: 500; z-index: 10000;
    opacity: 0; pointer-events: none; transition: all var(--transition-normal);
    border: 1px solid rgba(212, 175, 55, 0.3); box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== Footer ===== */
.footer { background: var(--black-primary); border-top: 1px solid rgba(212, 175, 55, 0.1); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo-text { font-size: 1.5rem; margin-bottom: 15px; display: block; }
.footer-brand p { color: var(--gray-text); font-size: 0.9rem; line-height: 1.8; }
.footer-col h4 { color: var(--gold-primary); font-size: 1rem; margin-bottom: 20px; font-weight: 600; }
.footer-col a { display: block; color: var(--gray-text); font-size: 0.9rem; padding: 5px 0; transition: all var(--transition-normal); }
.footer-col a:hover { color: var(--gold-light); padding-left: 5px; }
.footer-bottom { text-align: center; padding-top: 30px; border-top: 1px solid rgba(212, 175, 55, 0.08); color: var(--gray-text); font-size: 0.85rem; }

/* ===== Floating Buttons ===== */
.floating-bar { position: fixed; bottom: 30px; right: 30px; z-index: 999; display: flex; flex-direction: column; gap: 12px; }
.floating-btn {
    width: 56px; height: 56px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; cursor: pointer; transition: all var(--transition-normal); border: none; position: relative;
    text-decoration: none;
}
.floating-btn:hover { transform: scale(1.15); }
.floating-btn.phone { background: var(--gold-gradient); color: var(--black-deep); box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3); }
.floating-btn.wechat { background: #07C160; color: white; box-shadow: 0 4px 15px rgba(7, 193, 96, 0.3); }
.floating-btn.qq { background: #12B7F5; color: white; box-shadow: 0 4px 15px rgba(18, 183, 245, 0.3); }
.floating-btn.copy-qq { background: var(--gold-gradient); color: var(--black-deep); box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3); }
.floating-btn .tooltip {
    position: absolute; right: 70px; white-space: nowrap; background: var(--black-card);
    color: var(--gray-light); padding: 8px 16px; border-radius: 8px; font-size: 0.85rem;
    opacity: 0; pointer-events: none; transition: all var(--transition-normal);
    border: 1px solid rgba(212, 175, 55, 0.2);
}
.floating-btn .tooltip::after {
    content: ''; position: absolute; right: -6px; top: 50%; transform: translateY(-50%);
    border: 6px solid transparent; border-left-color: var(--black-card);
}
.floating-btn:hover .tooltip { opacity: 1; right: 65px; }

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed; bottom: 100px; right: 35px; width: 45px; height: 45px;
    background: var(--black-card); border: 1px solid rgba(212, 175, 55, 0.2);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    cursor: pointer; opacity: 0; pointer-events: none; transition: all var(--transition-normal);
    z-index: 998; color: var(--gold-primary); font-size: 1.2rem; text-decoration: none;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { background: rgba(212, 175, 55, 0.15); transform: translateY(-3px); }

/* ===== Page Loader ===== */
.page-loader {
    position: fixed; inset: 0; background: var(--black-deep); display: flex;
    align-items: center; justify-content: center; z-index: 99999; transition: opacity 0.5s ease;
}
.page-loader.hidden { opacity: 0; pointer-events: none; }
.loader-ring {
    width: 50px; height: 50px; border: 3px solid rgba(212, 175, 55, 0.1);
    border-top-color: var(--gold-primary); border-radius: 50%; animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Fade In Animation ===== */
.fade-in { opacity: 0; transform: translateY(30px); transition: all 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .articles-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    :root { --section-padding: 60px 0; }
    .header-inner { height: 70px; }
    .menu-toggle { display: flex; }
    .nav-menu {
        position: fixed; top: 0; right: -100%; width: 280px; height: 100vh;
        background: var(--black-primary); flex-direction: column; padding: 100px 30px 30px;
        gap: 5px; transition: right var(--transition-normal); border-left: 1px solid rgba(212, 175, 55, 0.1);
    }
    .nav-menu.open { right: 0; }
    .nav-menu a { width: 100%; padding: 12px 20px; }
    .hero-content h1 { font-size: 2.2rem; letter-spacing: 2px; }
    .hero-content .subtitle { font-size: 1rem; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .services-grid { grid-template-columns: 1fr; }
    .articles-grid { grid-template-columns: 1fr; }
    .article-list-item { flex-direction: column; }
    .article-list-image { width: 100%; min-height: 160px; }
    .article-list-body { padding: 20px; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .section-title h2 { font-size: 1.8rem; }
    .article-header h1 { font-size: 1.6rem; }
    .floating-bar { bottom: 20px; right: 15px; gap: 10px; }
    .floating-btn { width: 48px; height: 48px; font-size: 1.2rem; }
    .floating-btn .tooltip { display: none; }
    .article-nav { flex-direction: column; }
}
@media (max-width: 480px) {
    .hero-content h1 { font-size: 1.8rem; }
    .container { padding: 0 15px; }
    .service-card { padding: 30px 20px; }
}