/* ============================================================
   棋牌试玩 - Main Stylesheet
   Professional Mahjong Entertainment Platform
   ============================================================ */

/* === CSS Variables === */
:root {
    --color-primary: #c0392b;
    --color-primary-dark: #96281b;
    --color-primary-light: #e74c3c;
    --color-secondary: #2c3e50;
    --color-accent: #f39c12;
    --color-accent-light: #f1c40f;
    --color-bg: #fdfaf6;
    --color-bg-alt: #f5f0e8;
    --color-bg-dark: #1a1a2e;
    --color-text: #2c3e50;
    --color-text-light: #7f8c8d;
    --color-text-white: #ffffff;
    --color-border: #ddd;
    --color-success: #27ae60;
    --color-gold: #d4a017;
    --font-serif: 'Noto Serif SC', 'SimSun', serif;
    --font-display: 'ZCOOL KuaiLe', cursive;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);
    --shadow-xl: 0 12px 48px rgba(0,0,0,0.2);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
    --container-max: 1200px;
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-serif);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.8;
    overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary-dark); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.4; font-weight: 700; color: var(--color-secondary); }

/* === Container === */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 20px; }

/* === Navigation === */
.site-header {
    position: relative; z-index: 1000;
    background: linear-gradient(135deg, var(--color-secondary) 0%, #1a252f 100%);
    box-shadow: var(--shadow-md);
}
.nav-container {
    max-width: var(--container-max); margin: 0 auto; padding: 0 20px;
    display: flex; align-items: center; justify-content: space-between; height: 64px;
}
.nav-logo { display: flex; align-items: center; }
.logo-text {
    font-family: var(--font-display); font-size: 1.5rem;
    color: var(--color-accent); letter-spacing: 2px;
}
.nav-menu { display: flex; gap: 4px; }
.nav-link {
    color: var(--color-text-white); padding: 8px 16px; border-radius: var(--radius-sm);
    font-size: 0.95rem; transition: var(--transition); position: relative;
}
.nav-link:hover, .nav-link.active {
    color: var(--color-accent); background: rgba(255,255,255,0.1);
}
.nav-link.active::after {
    content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
    width: 20px; height: 3px; background: var(--color-accent); border-radius: 2px;
}
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle-bar {
    display: block; width: 24px; height: 2px; background: #fff;
    margin: 5px 0; transition: var(--transition); border-radius: 2px;
}

/* === Breadcrumb === */
.breadcrumb-wrap { background: var(--color-bg-alt); padding: 12px 0; border-bottom: 1px solid var(--color-border); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; font-size: 0.85rem; }
.breadcrumb-item + .breadcrumb-item::before { content: '/'; color: var(--color-text-light); margin-right: 8px; }
.breadcrumb-item a { color: var(--color-text-light); }
.breadcrumb-item a:hover { color: var(--color-primary); }
.breadcrumb-item.active { color: var(--color-text); }

/* === Hero Section === */
.hero-section {
    position: relative; min-height: 600px;
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #16213e 50%, #0f3460 100%);
    display: flex; align-items: center; overflow: hidden;
}
.hero-bg-pattern {
    position: absolute; inset: 0; opacity: 0.05;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-content { position: relative; z-index: 2; text-align: center; padding: 60px 20px; width: 100%; }
.hero-title {
    font-family: var(--font-display); font-size: 3.5rem; color: var(--color-accent);
    text-shadow: 0 4px 20px rgba(0,0,0,0.3); margin-bottom: 16px;
    animation: fadeInDown 0.8s ease;
}
.hero-subtitle {
    font-size: 1.5rem; color: rgba(255,255,255,0.9); margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.2s both;
}
.hero-desc {
    font-size: 1.05rem; color: rgba(255,255,255,0.7); max-width: 700px; margin: 0 auto 32px;
    animation: fadeInUp 0.8s ease 0.4s both;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; animation: fadeInUp 0.8s ease 0.6s both; }

/* === Buttons === */
.btn {
    display: inline-block; padding: 12px 32px; border-radius: var(--radius-sm);
    font-size: 1rem; font-weight: 600; cursor: pointer; transition: var(--transition);
    border: none; text-align: center; position: relative; overflow: hidden;
}
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff; box-shadow: 0 4px 15px rgba(192,57,43,0.3);
}
.btn-primary:hover {
    transform: translateY(-2px); box-shadow: 0 6px 20px rgba(192,57,43,0.4); color: #fff;
}
.btn-secondary {
    background: transparent; color: var(--color-accent); border: 2px solid var(--color-accent);
}
.btn-secondary:hover {
    background: var(--color-accent); color: var(--color-bg-dark); transform: translateY(-2px);
}
.btn-ripple::after {
    content: ''; position: absolute; inset: 0; background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    opacity: 0; transition: opacity 0.5s;
}
.btn-ripple:hover::after { opacity: 1; }

/* === Section Styles === */
.section { padding: 80px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-dark { background: var(--color-bg-dark); color: var(--color-text-white); }
.section-title {
    font-family: var(--font-display); font-size: 2.2rem; text-align: center;
    margin-bottom: 16px; position: relative; padding-bottom: 16px;
}
.section-title::after {
    content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
    width: 60px; height: 4px; background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: 2px;
}
.section-desc { text-align: center; color: var(--color-text-light); max-width: 700px; margin: 0 auto 48px; font-size: 1.05rem; }

/* === Card Grid === */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.card {
    background: #fff; border-radius: var(--radius-md); overflow: hidden;
    box-shadow: var(--shadow-sm); transition: var(--transition);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.card-float { transition: var(--transition); }
.card-float:hover { transform: translateY(-8px); box-shadow: var(--shadow-xl); }
.card-image { width: 100%; height: 200px; object-fit: cover; }
.card-body { padding: 20px; }
.card-title { font-size: 1.2rem; margin-bottom: 8px; color: var(--color-secondary); }
.card-text { font-size: 0.95rem; color: var(--color-text-light); line-height: 1.7; }

/* === Feature Grid === */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 32px; }
.feature-item {
    text-align: center; padding: 40px 24px; background: #fff;
    border-radius: var(--radius-md); box-shadow: var(--shadow-sm); transition: var(--transition);
}
.feature-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.feature-icon { font-size: 3rem; margin-bottom: 16px; }
.feature-title { font-size: 1.2rem; margin-bottom: 12px; color: var(--color-secondary); }
.feature-desc { font-size: 0.95rem; color: var(--color-text-light); }

/* === Stats Section === */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 32px; text-align: center; }
.stat-item { padding: 32px 16px; }
.stat-number {
    font-family: var(--font-display); font-size: 3rem; color: var(--color-accent);
    margin-bottom: 8px; line-height: 1;
}
.stat-label { font-size: 1rem; color: rgba(255,255,255,0.8); }

/* === Game Modes === */
.mode-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.mode-card {
    background: #fff; border-radius: var(--radius-md); overflow: hidden;
    box-shadow: var(--shadow-sm); transition: var(--transition); display: flex; flex-direction: column;
}
.mode-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.mode-image { width: 100%; height: 180px; object-fit: cover; }
.mode-body { padding: 24px; flex: 1; }
.mode-title { font-size: 1.3rem; margin-bottom: 8px; color: var(--color-primary); }
.mode-desc { font-size: 0.95rem; color: var(--color-text-light); margin-bottom: 16px; }
.mode-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.mode-tag {
    font-size: 0.8rem; padding: 4px 12px; background: var(--color-bg-alt);
    border-radius: 20px; color: var(--color-text-light);
}

/* === Testimonials === */
.testimonial-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.testimonial-card {
    background: #fff; border-radius: var(--radius-md); padding: 32px;
    box-shadow: var(--shadow-sm); position: relative; transition: var(--transition);
}
.testimonial-card:hover { box-shadow: var(--shadow-md); }
.testimonial-card::before {
    content: '"'; position: absolute; top: 16px; left: 24px;
    font-size: 4rem; color: var(--color-primary); opacity: 0.15; font-family: Georgia, serif; line-height: 1;
}
.testimonial-text { font-size: 0.95rem; color: var(--color-text); margin-bottom: 16px; font-style: italic; }
.testimonial-author { font-size: 0.9rem; color: var(--color-text-light); font-weight: 600; }

/* === Article Page === */
.article-page { padding: 48px 0 80px; }
.article-header { text-align: center; margin-bottom: 40px; }
.article-title { font-family: var(--font-display); font-size: 2.5rem; color: var(--color-primary); margin-bottom: 8px; }
.article-subtitle { font-size: 1.3rem; color: var(--color-text-light); font-weight: 400; margin-bottom: 16px; }
.article-meta { font-size: 0.85rem; color: var(--color-text-light); display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; }
.article-hero { margin-bottom: 40px; border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-md); }
.article-hero img { width: 100%; height: auto; }
.article-content { max-width: 800px; margin: 0 auto; }
.article-content h3 {
    font-size: 1.5rem; color: var(--color-primary); margin: 40px 0 16px;
    padding-left: 16px; border-left: 4px solid var(--color-primary);
}
.article-content p { margin-bottom: 20px; text-indent: 2em; text-align: justify; }
.article-content img { margin: 24px auto; border-radius: var(--radius-sm); box-shadow: var(--shadow-sm); }
.article-cta {
    margin: 48px 0; padding: 32px; text-align: center;
    background: linear-gradient(135deg, var(--color-bg-alt), #fff);
    border-radius: var(--radius-md); border: 1px solid var(--color-border);
}
.article-cta p { text-indent: 0; text-align: center; margin-bottom: 16px; }
.article-nav { display: flex; justify-content: space-between; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--color-border); }
.article-nav-link { font-size: 0.95rem; color: var(--color-primary); }
.article-nav-link:hover { color: var(--color-primary-dark); }

/* === Download Page === */
.download-hero { padding: 60px 0 40px; text-align: center; }
.download-banner { margin-bottom: 24px; border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-md); }
.download-banner img { width: 100%; height: auto; }
.download-title { font-family: var(--font-display); font-size: 2.5rem; color: var(--color-primary); margin-bottom: 8px; }
.download-subtitle { font-size: 1.3rem; color: var(--color-text-light); margin-bottom: 16px; }
.download-desc { max-width: 700px; margin: 0 auto; color: var(--color-text-light); }
.download-platforms { padding: 60px 0; }
.platform-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.platform-card {
    background: #fff; border-radius: var(--radius-md); padding: 32px;
    box-shadow: var(--shadow-sm); text-align: center; transition: var(--transition);
}
.platform-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.platform-name { font-size: 1.3rem; color: var(--color-secondary); margin-bottom: 12px; }
.platform-info { font-size: 0.9rem; color: var(--color-text-light); margin-bottom: 16px; }
.platform-features { margin-bottom: 20px; text-align: left; }
.platform-features li { font-size: 0.9rem; color: var(--color-text-light); padding: 4px 0; padding-left: 20px; position: relative; }
.platform-features li::before { content: '✓'; position: absolute; left: 0; color: var(--color-success); font-weight: 700; }
.download-screenshots { padding: 60px 0; background: var(--color-bg-alt); }
.screenshots-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; }
.screenshot-item { border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); }
.screenshot-item img { width: 100%; height: auto; }

/* === Contact Page === */
.contact-info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; margin: 24px 0; }
.contact-item {
    background: var(--color-bg-alt); border-radius: var(--radius-md); padding: 24px;
    border: 1px solid var(--color-border);
}
.contact-item h4 { font-size: 1.1rem; color: var(--color-primary); margin-bottom: 8px; }
.contact-item p { text-indent: 0; font-size: 0.95rem; margin-bottom: 4px; }

/* === Footer === */
.site-footer {
    background: var(--color-bg-dark); color: rgba(255,255,255,0.8); padding: 60px 0 24px;
}
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 32px; margin-bottom: 40px; }
.footer-heading { font-size: 1.1rem; color: var(--color-accent); margin-bottom: 16px; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.footer-links a:hover { color: var(--color-accent); }
.footer-disclaimer {
    padding: 20px 0; border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.5);
}
.footer-bottom { text-align: center; font-size: 0.8rem; color: rgba(255,255,255,0.4); padding-top: 16px; }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--color-accent); }

/* === Animations === */
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideInLeft { from { opacity: 0; transform: translateX(-40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.05); } }

.animate-fade-in { animation: fadeIn 0.8s ease both; }
.animate-fade-up { animation: fadeInUp 0.8s ease both; }
.animate-slide-left { animation: slideInLeft 0.8s ease both; }
.animate-slide-right { animation: slideInRight 0.8s ease both; }

/* === Scroll Reveal === */
.reveal { opacity: 0; transform: translateY(30px); transition: all 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* === Responsive === */
@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .nav-menu {
        display: none; position: absolute; top: 64px; left: 0; right: 0;
        background: var(--color-secondary); flex-direction: column; padding: 16px;
        box-shadow: var(--shadow-lg);
    }
    .nav-menu.active { display: flex; }
    .nav-link { padding: 12px 16px; }
    .hero-title { font-size: 2.2rem; }
    .hero-subtitle { font-size: 1.1rem; }
    .section-title { font-size: 1.8rem; }
    .article-title { font-size: 1.8rem; }
    .article-content h3 { font-size: 1.2rem; }
    .section { padding: 48px 0; }
    .stat-number { font-size: 2rem; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.8rem; }
    .hero-subtitle { font-size: 1rem; }
    .hero-actions { flex-direction: column; align-items: center; }
    .btn { width: 100%; max-width: 280px; }
    .section-title { font-size: 1.5rem; }
    .footer-grid { grid-template-columns: 1fr; }
    .article-meta { flex-direction: column; gap: 8px; }
}

/* === Utility Classes === */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }