/* ========================================
   上海会所 - 黑金奢华主题样式表
   ======================================== */

/* CSS Variables - 黑金配色系统 */
:root {
    --primary-black: #0a0a0a;
    --secondary-black: #1a1a1a;
    --tertiary-black: #2a2a2a;
    --gold-primary: #d4af37;
    --gold-light: #f4e5b8;
    --gold-dark: #b8941f;
    --gold-gradient: linear-gradient(135deg, #d4af37 0%, #f4e5b8 50%, #b8941f 100%);
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #888888;
    --border-gold: rgba(212, 175, 55, 0.3);
    --shadow-gold: 0 0 20px rgba(212, 175, 55, 0.3);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--primary-black);
    color: var(--text-primary);
    line-height: 1.8;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: var(--gold-primary);
}

h3 {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--gold-light);
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

a {
    color: var(--gold-primary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

a:hover {
    color: var(--gold-light);
    text-shadow: 0 0 10px rgba(212, 175, 55, 0.5);
}

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

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-gold);
    z-index: 1000;
    transition: var(--transition-smooth);
}

header.scrolled {
    box-shadow: var(--shadow-gold);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo svg {
    width: 60px;
    height: 60px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: bold;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: var(--text-primary);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold-gradient);
    transition: width 0.3s ease;
}

nav a:hover::after,
nav a.active::after {
    width: 100%;
}

/* Mobile Menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--gold-primary);
    transition: var(--transition-smooth);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-black) 0%, var(--secondary-black) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 2rem;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease;
}

.hero p {
    font-size: clamp(1rem, 2vw, 1.3rem);
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.cta-button {
    display: inline-block;
    padding: 1rem 3rem;
    background: var(--gold-gradient);
    color: var(--primary-black);
    font-weight: bold;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: var(--transition-smooth);
    animation: fadeInUp 1s ease 0.4s backwards;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.4);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Section Styles */
section {
    padding: 5rem 0;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    display: inline-block;
    position: relative;
    padding-bottom: 1rem;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--gold-gradient);
}

/* Service Cards */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--secondary-black);
    border: 1px solid var(--border-gold);
    border-radius: 15px;
    padding: 2rem;
    transition: var(--transition-smooth);
    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 0.3s ease;
}

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

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--gold-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

/* Article Cards */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.article-card {
    background: var(--secondary-black);
    border: 1px solid var(--border-gold);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-gold);
}

.article-image {
    width: 100%;
    height: 200px;
    background: var(--tertiary-black);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-gold);
}

.article-content {
    padding: 1.5rem;
}

.article-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.article-title {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--gold-light);
}

.article-excerpt {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.read-more {
    color: var(--gold-primary);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.read-more:hover {
    gap: 1rem;
}

/* Article Detail Page */
.article-detail {
    max-width: 800px;
    margin: 0 auto;
    padding: 8rem 20px 5rem;
}

.article-header {
    margin-bottom: 3rem;
    text-align: center;
}

.article-header h1 {
    margin-bottom: 1rem;
}

.article-info {
    display: flex;
    justify-content: center;
    gap: 2rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.article-body {
    line-height: 2;
}

.article-body h2 {
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.article-body h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
}

.article-body p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 2rem 0;
    border: 1px solid var(--border-gold);
}

/* Category Page */
.category-header {
    padding: 8rem 0 3rem;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-black) 0%, var(--secondary-black) 100%);
}

.category-content {
    padding: 3rem 0;
}

/* Footer */
footer {
    background: var(--secondary-black);
    border-top: 1px solid var(--border-gold);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--gold-primary);
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--text-secondary);
}

.footer-section a:hover {
    color: var(--gold-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-gold);
    color: var(--text-muted);
}

/* Floating Contact Bar */
.floating-contact {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}

.floating-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gold-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: 0 5px 20px rgba(212, 175, 55, 0.3);
    border: none;
    color: var(--primary-black);
    font-size: 1.5rem;
}

.floating-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.5);
}

.floating-btn:active {
    transform: scale(0.95);
}

/* Toast Notification */
.toast {
    position: fixed;
    top: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: var(--gold-gradient);
    color: var(--primary-black);
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: bold;
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.4);
    z-index: 10000;
    opacity: 0;
    transition: all 0.3s ease;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Breadcrumb */
.breadcrumb {
    padding: 1rem 0;
    color: var(--text-muted);
}

.breadcrumb a {
    color: var(--gold-primary);
}

.breadcrumb span {
    margin: 0 0.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    nav ul {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--primary-black);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 3rem;
        transition: left 0.3s ease;
    }

    nav ul.active {
        left: 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .services-grid,
    .articles-grid {
        grid-template-columns: 1fr;
    }

    .floating-contact {
        bottom: 20px;
        right: 20px;
    }

    .floating-btn {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-gold { color: var(--gold-primary); }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }

/* Loading Animation */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

/* Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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