/* 太阳直播 (taiyangzhibo.com) - 统一高端暗黑科技风样式表 */
:root {
    --bg-main: #0B0E14;
    --bg-card: #151921;
    --bg-card-hover: #1E232F;
    --primary-gold: #FF9F00;
    --primary-orange: #FF5500;
    --gradient-sun: linear-gradient(135deg, #FF9F00 0%, #FF5500 100%);
    --text-primary: #FFFFFF;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(255, 159, 0, 0.3);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --max-width: 1200px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.6;
    overflow-x: hidden;
    padding-bottom: 70px; /* Space for mobile sticky download */
}

@media (min-width: 769px) {
    body { padding-bottom: 0; }
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
}

/* 统一 Navigation Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(11, 14, 20, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-sun);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 15px rgba(255, 159, 0, 0.4);
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    font-size: 15px;
    color: var(--text-secondary);
    font-weight: 500;
}

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

.header-btn {
    background: var(--gradient-sun);
    color: #fff;
    padding: 10px 24px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 4px 12px rgba(255, 85, 0, 0.3);
}

.header-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 85, 0, 0.5);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
}

/* 统一 Hero Banner Base */
.page-hero {
    padding: 140px 24px 60px;
    text-align: center;
    max-width: var(--max-width);
    margin: 0 auto;
}

.page-hero h1 {
    font-size: 44px;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(180deg, #FFFFFF 0%, #94A3B8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-hero p {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto;
}

.highlight-text {
    background: var(--gradient-sun);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 统一 Card Layouts */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: all 0.3s ease;
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-highlight);
    transform: translateY(-4px);
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--gradient-sun);
    color: #fff;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(255, 85, 0, 0.4);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Section Containers */
.section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
}

.section-title {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 48px;
    font-size: 16px;
}

/* Footer */
.footer {
    background: #07090D;
    border-top: 1px solid var(--border-color);
    padding: 60px 24px 30px;
    margin-top: 80px;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: 16px;
    font-size: 14px;
    max-width: 300px;
}

.footer-col h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

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

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    color: var(--text-muted);
    font-size: 14px;
}

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

.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-muted);
}

/* Sticky Mobile Download Bar */
.mobile-sticky-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(21, 25, 33, 0.95);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-color);
    padding: 10px 16px;
    z-index: 999;
    align-items: center;
    justify-content: space-between;
}

.mobile-app-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mobile-app-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-sun);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

/* Responsive Rules */
@media (max-width: 992px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .footer-container { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-card);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
    }
    .nav-links.active { display: flex; }
    .mobile-menu-btn { display: block; }
    .header-btn { display: none; }
    
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .page-hero h1 { font-size: 32px; }
    .footer-container { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    
    .mobile-sticky-bar { display: flex; }
}