/* style.css - LEYU乐鱼官网 综合体育娱乐平台入口 */
/* 暗色主题 + 渐变Banner + 圆角卡片 + 毛玻璃 + 滚动动画 + 响应式 */

/* 全局重置与基础 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0d0d1a;
    --bg-secondary: #1a1a2e;
    --bg-card: rgba(26, 26, 46, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.06);
    --text-primary: #f0e6d0;
    --text-secondary: #b8a9c9;
    --accent-gold: #ffd700;
    --accent-cyan: #00d4ff;
    --accent-purple: #8b5cf6;
    --gradient-main: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 40%, #0f3460 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,215,0,0.08), rgba(0,212,255,0.05));
    --shadow-card: 0 8px 32px rgba(0,0,0,0.4), 0 2px 8px rgba(0,0,0,0.2);
    --shadow-glow: 0 0 20px rgba(255,215,0,0.15);
    --border-glass: 1px solid rgba(255,255,255,0.08);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
    background: var(--accent-gold);
    border-radius: 4px;
}

/* 链接 */
a {
    color: var(--accent-gold);
    text-decoration: none;
    transition: var(--transition);
}
a:hover {
    color: var(--accent-cyan);
    text-shadow: 0 0 8px rgba(0,212,255,0.3);
}

/* 标题 */
h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: 0.02em;
}

/* ========== 头部导航 ========== */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(13, 13, 26, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: var(--border-glass);
    padding: 0 24px;
}

nav {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

nav > a {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

nav ul li a {
    display: inline-block;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60%;
    height: 2px;
    background: var(--accent-gold);
    border-radius: 2px;
    transition: transform 0.3s ease;
}

nav ul li a:hover::after,
nav ul li a:focus::after {
    transform: translateX(-50%) scaleX(1);
}

nav ul li a:hover {
    color: var(--accent-gold);
    background: rgba(255, 215, 0, 0.08);
}

/* ========== 滚动动画基类 ========== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.92); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

section {
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
}

section:nth-child(2) { animation-delay: 0.1s; }
section:nth-child(3) { animation-delay: 0.2s; }
section:nth-child(4) { animation-delay: 0.3s; }
section:nth-child(5) { animation-delay: 0.4s; }
section:nth-child(6) { animation-delay: 0.5s; }
section:nth-child(7) { animation-delay: 0.6s; }
section:nth-child(8) { animation-delay: 0.7s; }

/* ========== Hero Banner ========== */
#hero {
    background: var(--gradient-hero);
    padding: 100px 24px 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 2px solid rgba(255,215,0,0.15);
}

#hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(255,215,0,0.06) 0%, transparent 60%),
                radial-gradient(circle at 70% 30%, rgba(0,212,255,0.05) 0%, transparent 50%);
    animation: shimmer 12s linear infinite;
    background-size: 400% 400%;
    pointer-events: none;
}

#hero h1 {
    font-size: clamp(2rem, 5vw, 3.8rem);
    background: linear-gradient(135deg, var(--accent-gold), #ff8c00, var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
    text-shadow: 0 0 40px rgba(255,215,0,0.2);
}

#hero p {
    max-width: 720px;
    margin: 0 auto 16px;
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
}

#hero p:first-of-type {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    color: var(--accent-gold);
    font-weight: 600;
}

#hero a {
    display: inline-block;
    margin-top: 28px;
    padding: 14px 48px;
    background: linear-gradient(135deg, var(--accent-gold), #f59e0b);
    color: #1a1a2e;
    font-weight: 700;
    font-size: 1.1rem;
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 24px rgba(255,215,0,0.3);
    transition: var(--transition);
    position: relative;
    z-index: 1;
    letter-spacing: 0.03em;
}

#hero a:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 40px rgba(255,215,0,0.45);
    color: #0d0d1a;
}

#hero img {
    max-width: 100%;
    height: auto;
    margin-top: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    display: block;
    margin-left: auto;
    margin-right: auto;
    transition: var(--transition);
}

#hero img:hover {
    transform: scale(1.01);
    box-shadow: 0 12px 48px rgba(0,0,0,0.6);
}

/* ========== 通用section样式 ========== */
section:not(#hero) {
    max-width: 1280px;
    margin: 0 auto;
    padding: 80px 24px;
}

section h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    text-align: center;
    margin-bottom: 48px;
    position: relative;
    display: inline-block;
    width: 100%;
}

section h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-cyan));
    border-radius: 4px;
    margin: 12px auto 0;
}

/* ========== About ========== */
#about {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin: 40px auto;
    padding: 60px 32px;
    box-shadow: var(--shadow-card);
}

#about p {
    max-width: 800px;
    margin: 0 auto 18px;
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
}

#about p:last-child {
    color: var(--accent-gold);
    font-weight: 600;
    font-size: 1.1rem;
}

/* ========== Products & Services 卡片网格 ========== */
#products, #services {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
    padding-top: 40px;
}

#products h2, #services h2 {
    grid-column: 1 / -1;
}

#products article,
#services article {
    background: var(--gradient-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: var(--border-glass);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

#products article::before,
#services article::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-cyan));
    opacity: 0;
    transition: var(--transition);
}

#products article:hover::before,
#services article:hover::before {
    opacity: 1;
}

#products article:hover,
#services article:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.5), var(--shadow-glow);
    border-color: rgba(255,215,0,0.2);
}

#products h3,
#services h3 {
    font-size: 1.4rem;
    margin-bottom: 14px;
    color: var(--accent-gold);
}

#products p,
#services p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== Advantages ========== */
#advantages {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 60px 32px;
    margin: 40px auto;
    box-shadow: var(--shadow-card);
}

#advantages ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    max-width: 1100px;
    margin: 0 auto;
}

#advantages ul li {
    background: var(--bg-glass);
    border: var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 20px 24px;
    transition: var(--transition);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

#advantages ul li:hover {
    transform: translateY(-4px);
    background: rgba(255,215,0,0.06);
    border-color: rgba(255,215,0,0.2);
    box-shadow: var(--shadow-glow);
}

#advantages ul li strong {
    color: var(--accent-gold);
    display: block;
    margin-bottom: 6px;
    font-size: 1.05rem;
}

/* ========== Testimonials ========== */
#testimonials {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
    padding-top: 40px;
}

#testimonials h2 {
    grid-column: 1 / -1;
}

blockquote {
    background: var(--gradient-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: var(--border-glass);
    border-radius: var(--radius-md);
    padding: 32px 28px;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    position: relative;
}

blockquote::before {
    content: '"';
    position: absolute;
    top: 8px;
    left: 16px;
    font-size: 4rem;
    color: var(--accent-gold);
    opacity: 0.2;
    font-family: Georgia, serif;
    line-height: 1;
}

blockquote:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.4), var(--shadow-glow);
}

blockquote p {
    font-style: italic;
    color: var(--text-primary);
    line-height: 1.7;
    margin-bottom: 16px;
}

blockquote footer {
    color: var(--accent-cyan);
    font-size: 0.9rem;
    text-align: right;
}

/* ========== FAQ ========== */
#faq {
    max-width: 860px;
    margin: 40px auto;
    padding: 60px 24px;
}

details {
    background: var(--bg-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: var(--border-glass);
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    transition: var(--transition);
    overflow: hidden;
}

details[open] {
    background: rgba(255,215,0,0.04);
    border-color: rgba(255,215,0,0.15);
    box-shadow: var(--shadow-glow);
}

summary {
    padding: 18px 24px;
    font-weight: 600;
    font-size: 1.05rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
    color: var(--text-primary);
}

summary::-webkit-details-marker {
    display: none;
}

summary::after {
    content: '+';
    font-size: 1.4rem;
    color: var(--accent-gold);
    transition: transform 0.3s ease;
    flex-shrink: 0;
    margin-left: 12px;
}

details[open] summary::after {
    content: '−';
    transform: rotate(180deg);
}

summary:hover {
    color: var(--accent-gold);
    background: rgba(255,215,0,0.04);
}

details p {
    padding: 0 24px 20px 24px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========== Contact ========== */
#contact {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 60px 32px;
    margin: 40px auto;
    box-shadow: var(--shadow-card);
    max-width: 800px;
}

#contact p {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

address {
    font-style: normal;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    max-width: 700px;
    margin: 0 auto;
}

address p {
    background: var(--bg-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    text-align: left;
    transition: var(--transition);
}

address p:hover {
    background: rgba(255,215,0,0.04);
    border-color: rgba(255,215,0,0.15);
    transform: translateY(-2px);
}

address strong {
    color: var(--accent-gold);
    display: block;
    margin-bottom: 4px;
    font-size: 0.9rem;
}

/* ========== Footer ========== */
footer {
    background: var(--bg-secondary);
    border-top: var(--border-glass);
    padding: 48px 24px 32px;
    text-align: center;
}

footer nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 20px;
    margin-bottom: 28px;
}

footer nav ul li a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

footer nav ul li a:hover {
    color: var(--accent-gold);
    background: rgba(255,215,0,0.06);
}

footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    max-width: 800px;
    margin: 0 auto 8px;
    line-height: 1.7;
}

footer p:last-child {
    color: var(--accent-cyan);
    font-size: 0.85rem;
    margin-top: 16px;
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    section:not(#hero) {
        padding: 60px 20px;
    }
    #hero {
        padding: 80px 20px 60px;
    }
}

@media (max-width: 768px) {
    nav {
        flex-direction: column;
        height: auto;
        padding: 12px 0;
        gap: 10px;
    }
    nav ul {
        justify-content: center;
        gap: 4px;
    }
    nav ul li a {
        padding: 6px 12px;
        font-size: 0.85rem;
    }

    #hero {
        padding: 60px 16px 40px;
    }
    #hero h1 {
        font-size: 1.8rem;
    }
    #hero a {
        padding: 12px 36px;
        font-size: 1rem;
    }

    #products, #services {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    #testimonials {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    #advantages ul {
        grid-template-columns: 1fr;
    }

    #about, #advantages, #contact {
        padding: 40px 20px;
        margin: 20px auto;
    }

    #faq {
        padding: 40px 16px;
    }

    address {
        grid-template-columns: 1fr;
    }

    footer {
        padding: 32px 16px 24px;
    }
    footer nav ul {
        gap: 6px 14px;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    nav ul li a {
        padding: 4px 10px;
        font-size: 0.8rem;
    }

    #hero h1 {
        font-size: 1.5rem;
    }
    #hero p {
        font-size: 0.95rem;
    }

    section h2 {
        font-size: 1.5rem;
        margin-bottom: 32px;
    }

    #products article,
    #services article {
        padding: 24px 18px;
    }

    blockquote {
        padding: 24px 20px;
    }
}

/* ========== 暗色模式增强 ========== */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0a0a14;
        --bg-secondary: #12121e;
    }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html {
        scroll-behavior: auto;
    }
}