/* ===== 欧义交易所 - 全局样式 ===== */
:root {
    --bg-deep: #0a1628;
    --bg-card: #0f1d3a;
    --bg-card-hover: #152245;
    --ouyi-blue: #1e40af;
    --ouyi-blue-light: #3b82f6;
    --ouyi-blue-glow: rgba(30,64,175,0.3);
    --safe-green: #059669;
    --safe-green-light: #10b981;
    --compliance-gold: #d97706;
    --compliance-gold-light: #f59e0b;
    --android-cyan: #06b6d4;
    --apple-silver: #94a3b8;
    --white: #ffffff;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-subtle: rgba(148,163,184,0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-card: 0 4px 24px rgba(0,0,0,0.3);
    --shadow-glow: 0 0 40px rgba(30,64,175,0.25);
    --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

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

/* ===== 渐入动画 ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(30,64,175,0.5); }
    50% { box-shadow: 0 0 0 16px rgba(30,64,175,0); }
}
@keyframes shieldPulse {
    0%, 100% { filter: drop-shadow(0 0 6px rgba(5,150,105,0.4)); }
    50% { filter: drop-shadow(0 0 18px rgba(5,150,105,0.8)); }
}
@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 marketSwitch {
    0% { opacity: 0; transform: translateY(10px); }
    50% { opacity: 1; transform: translateY(0); }
    100% { opacity: 1; transform: translateY(0); }
}
@keyframes floatUpDown {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(10,22,40,0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    transition: var(--transition);
}
.navbar .container {
    display: flex; align-items: center; justify-content: space-between;
    height: 64px;
}
.nav-brand {
    font-size: 1.4rem; font-weight: 700;
    color: var(--white);
    display: flex; align-items: center; gap: 8px;
}
.nav-brand .shield-icon {
    width: 32px; height: 32px;
    animation: shieldPulse 3s ease-in-out infinite;
}
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
    color: var(--text-secondary); font-size: 0.95rem;
    transition: color var(--transition); position: relative;
    padding: 4px 0;
}
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.nav-links a::after {
    content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px;
    background: var(--ouyi-blue-light); transition: width var(--transition);
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-cta {
    background: linear-gradient(135deg, var(--ouyi-blue), var(--ouyi-blue-light));
    color: var(--white); padding: 8px 20px; border-radius: 24px;
    font-weight: 600; font-size: 0.9rem; transition: var(--transition);
    animation: pulse 2.5s infinite;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.hamburger { display: none; flex-direction: column; gap: 4px; cursor: pointer; background: none; border: none; padding: 4px; }
.hamburger span { width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: var(--transition); }

/* ===== Hero 区域 ===== */
.hero {
    padding: 140px 0 80px;
    background: radial-gradient(ellipse at 50% 0%, rgba(30,64,175,0.2) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 50%, rgba(5,150,105,0.1) 0%, transparent 50%);
    text-align: center;
    animation: fadeIn 1s ease;
}
.hero-badge {
    display: inline-block; background: rgba(30,64,175,0.2); border: 1px solid rgba(30,64,175,0.4);
    color: var(--ouyi-blue-light); padding: 6px 16px; border-radius: 20px; font-size: 0.85rem;
    margin-bottom: 20px; animation: fadeInUp 0.6s ease;
}
.hero h1 {
    font-size: 3rem; font-weight: 800; color: var(--white);
    line-height: 1.2; margin-bottom: 16px;
    animation: fadeInUp 0.8s ease;
}
.hero h1 .highlight { background: linear-gradient(135deg, var(--ouyi-blue-light), var(--safe-green-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-subtitle {
    font-size: 1.15rem; color: var(--text-secondary); max-width: 680px;
    margin: 0 auto 32px; animation: fadeInUp 1s ease;
}
.hero-ctas { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; animation: fadeInUp 1.1s ease; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 32px; border-radius: 28px; font-weight: 600;
    font-size: 1rem; cursor: pointer; border: none;
    transition: all var(--transition); white-space: nowrap;
}
.btn-primary {
    background: linear-gradient(135deg, var(--ouyi-blue), var(--ouyi-blue-light));
    color: var(--white); box-shadow: 0 4px 20px var(--ouyi-blue-glow);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px var(--ouyi-blue-glow); }
.btn-outline {
    background: transparent; color: var(--white);
    border: 2px solid rgba(255,255,255,0.25);
}
.btn-outline:hover { border-color: var(--white); background: rgba(255,255,255,0.05); }
.btn-green {
    background: linear-gradient(135deg, var(--safe-green), var(--safe-green-light));
    color: var(--white); box-shadow: 0 4px 20px rgba(5,150,105,0.3);
}
.btn-green:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(5,150,105,0.4); }
.btn-gold {
    background: linear-gradient(135deg, var(--compliance-gold), var(--compliance-gold-light));
    color: var(--bg-deep); box-shadow: 0 4px 20px rgba(217,119,6,0.3);
}
.btn-gold:hover { transform: translateY(-3px); }

/* ===== 五种交易市场展示区 ===== */
.markets-section {
    padding: 80px 0;
    background: var(--bg-card);
}
.markets-section h2 {
    text-align: center; font-size: 2rem; font-weight: 700;
    color: var(--white); margin-bottom: 12px;
}
.markets-section .section-desc {
    text-align: center; color: var(--text-secondary); margin-bottom: 40px;
}
.market-tabs {
    display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin-bottom: 32px;
}
.market-tab {
    padding: 10px 24px; border-radius: 24px;
    background: rgba(255,255,255,0.05); border: 1px solid var(--border-subtle);
    color: var(--text-secondary); cursor: pointer; font-size: 0.95rem;
    transition: all var(--transition);
}
.market-tab:hover { border-color: var(--ouyi-blue-light); color: var(--white); }
.market-tab.active {
    background: var(--ouyi-blue); border-color: var(--ouyi-blue);
    color: var(--white); font-weight: 600;
}
.market-panel {
    display: none; gap: 40px; align-items: center;
    animation: marketSwitch 0.5s ease;
}
.market-panel.active { display: grid; grid-template-columns: 1fr 1fr; }
.market-panel img { border-radius: var(--radius-lg); box-shadow: var(--shadow-card); }
.market-panel h3 { font-size: 1.5rem; color: var(--white); margin-bottom: 8px; }
.market-panel p { color: var(--text-secondary); margin-bottom: 16px; line-height: 1.8; }
.market-panel .features { display: flex; flex-wrap: wrap; gap: 8px; }
.market-tag {
    padding: 4px 14px; border-radius: 14px; font-size: 0.82rem;
    background: rgba(30,64,175,0.15); color: var(--ouyi-blue-light);
}

/* ===== 双平台对比 ===== */
.platform-section { padding: 80px 0; }
.platform-section h2 { text-align: center; font-size: 2rem; font-weight: 700; color: var(--white); margin-bottom: 12px; }
.platform-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 40px; }
.platform-card {
    background: var(--bg-card); border-radius: var(--radius-lg);
    padding: 40px 32px; border: 1px solid var(--border-subtle);
    transition: all var(--transition); position: relative; overflow: hidden;
}
.platform-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
}
.platform-card.android::before { background: linear-gradient(90deg, var(--android-cyan), var(--safe-green-light)); }
.platform-card.ios::before { background: linear-gradient(90deg, var(--apple-silver), var(--ouyi-blue-light)); }
.platform-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); }
.platform-card .platform-icon { font-size: 2.5rem; margin-bottom: 16px; }
.platform-card h3 { font-size: 1.4rem; color: var(--white); margin-bottom: 12px; }
.platform-card p { color: var(--text-secondary); margin-bottom: 20px; }
.platform-card .highlight-feature {
    padding: 12px 16px; background: rgba(255,255,255,0.03); border-radius: var(--radius-sm);
    margin-bottom: 16px;
}
.platform-card .highlight-feature strong { display: block; color: var(--white); margin-bottom: 4px; }

/* ===== 6大优势 ===== */
.advantages-section { padding: 80px 0; background: var(--bg-card); }
.advantages-section h2 { text-align: center; font-size: 2rem; font-weight: 700; color: var(--white); margin-bottom: 40px; }
.advantages-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.advantage-card {
    background: var(--bg-deep); border-radius: var(--radius-md);
    padding: 32px 24px; border: 1px solid var(--border-subtle);
    transition: all var(--transition); text-align: center;
}
.advantage-card:hover { transform: translateY(-6px); border-color: var(--ouyi-blue-light); box-shadow: var(--shadow-glow); }
.advantage-icon {
    width: 56px; height: 56px; margin: 0 auto 16px;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
}
.advantage-icon.blue { background: rgba(30,64,175,0.2); }
.advantage-icon.green { background: rgba(5,150,105,0.2); }
.advantage-icon.gold { background: rgba(217,119,6,0.2); }
.advantage-icon.cyan { background: rgba(6,182,212,0.2); }
.advantage-card h3 { font-size: 1.1rem; color: var(--white); margin-bottom: 8px; }
.advantage-card p { color: var(--text-secondary); font-size: 0.92rem; }

/* ===== 安全合规认证 ===== */
.cert-section { padding: 80px 0; text-align: center; }
.cert-section h2 { font-size: 2rem; color: var(--white); margin-bottom: 40px; }
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.cert-item {
    padding: 32px 20px; background: var(--bg-card); border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle); transition: var(--transition);
}
.cert-item:hover { border-color: var(--safe-green); box-shadow: 0 0 30px rgba(5,150,105,0.15); }
.cert-item .cert-icon {
    font-size: 2rem; margin-bottom: 12px;
    animation: shieldPulse 4s ease-in-out infinite;
}
.cert-item h4 { color: var(--white); margin-bottom: 6px; font-size: 1rem; }
.cert-item p { color: var(--text-muted); font-size: 0.85rem; }

/* ===== CTA ===== */
.cta-section {
    padding: 80px 0; text-align: center;
    background: radial-gradient(ellipse at 50% 50%, rgba(30,64,175,0.25) 0%, transparent 60%);
}
.cta-section h2 { font-size: 2rem; color: var(--white); margin-bottom: 16px; }
.cta-section p { color: var(--text-secondary); margin-bottom: 32px; font-size: 1.05rem; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== 关于页面 ===== */
.page-hero {
    padding: 120px 0 60px; text-align: center;
    background: radial-gradient(ellipse at 50% 0%, rgba(30,64,175,0.2) 0%, transparent 60%);
}
.page-hero h1 { font-size: 2.5rem; font-weight: 800; color: var(--white); margin-bottom: 12px; }
.page-hero p { color: var(--text-secondary); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }
.about-content { padding: 60px 0; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.about-grid img { border-radius: var(--radius-lg); box-shadow: var(--shadow-card); }
.about-text h2 { font-size: 1.6rem; color: var(--white); margin-bottom: 16px; }
.about-text p { color: var(--text-secondary); margin-bottom: 12px; line-height: 1.8; }
.timeline { padding: 60px 0; }
.timeline h2 { text-align: center; font-size: 2rem; color: var(--white); margin-bottom: 40px; }
.timeline-list { max-width: 700px; margin: 0 auto; position: relative; }
.timeline-list::before {
    content: ''; position: absolute; left: 20px; top: 0; bottom: 0;
    width: 2px; background: linear-gradient(180deg, var(--ouyi-blue-light), var(--safe-green-light));
}
.timeline-item {
    position: relative; padding-left: 52px; margin-bottom: 32px;
}
.timeline-item::before {
    content: ''; position: absolute; left: 12px; top: 4px;
    width: 18px; height: 18px; border-radius: 50%;
    background: var(--ouyi-blue); border: 3px solid var(--bg-deep);
    box-shadow: 0 0 0 2px var(--ouyi-blue-light);
}
.timeline-item h4 { color: var(--white); margin-bottom: 4px; }
.timeline-item p { color: var(--text-muted); font-size: 0.9rem; }

/* ===== 服务页面 ===== */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; padding: 60px 0; }
.service-card {
    background: var(--bg-card); border-radius: var(--radius-lg);
    padding: 36px 28px; border: 1px solid var(--border-subtle);
    transition: all var(--transition); text-align: center;
}
.service-card:hover { transform: translateY(-6px); border-color: var(--ouyi-blue-light); box-shadow: var(--shadow-glow); }
.service-card .service-icon { font-size: 2.5rem; margin-bottom: 16px; }
.service-card h3 { color: var(--white); font-size: 1.2rem; margin-bottom: 10px; }
.service-card p { color: var(--text-secondary); font-size: 0.92rem; margin-bottom: 20px; }

/* ===== FAQ ===== */
.faq-section { padding: 60px 0; max-width: 800px; margin: 0 auto; }
.faq-section details {
    background: var(--bg-card); border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle); margin-bottom: 12px;
    transition: var(--transition); overflow: hidden;
}
.faq-section details[open] { border-color: var(--ouyi-blue-light); box-shadow: var(--shadow-glow); }
.faq-section summary {
    padding: 20px 24px; cursor: pointer; font-weight: 600;
    color: var(--white); font-size: 1.02rem;
    display: flex; justify-content: space-between; align-items: center;
    user-select: none;
}
.faq-section summary::-webkit-details-marker { display: none; }
.faq-section summary::after { content: '+'; font-size: 1.3rem; color: var(--ouyi-blue-light); transition: transform 0.3s; }
.faq-section details[open] summary::after { content: '−'; transform: rotate(180deg); }
.faq-section .faq-answer { padding: 0 24px 20px; color: var(--text-secondary); line-height: 1.8; }

/* ===== 联系表单 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; padding: 60px 0; }
.contact-form { background: var(--bg-card); border-radius: var(--radius-lg); padding: 40px; border: 1px solid var(--border-subtle); }
.contact-form h2 { color: var(--white); margin-bottom: 24px; font-size: 1.5rem; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; color: var(--text-secondary); margin-bottom: 6px; font-size: 0.9rem; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%; padding: 12px 16px; background: var(--bg-deep);
    border: 1px solid var(--border-subtle); border-radius: var(--radius-sm);
    color: var(--white); font-size: 0.95rem; transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none; border-color: var(--ouyi-blue-light); box-shadow: 0 0 0 3px var(--ouyi-blue-glow);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-info h2 { color: var(--white); margin-bottom: 8px; font-size: 1.5rem; }
.contact-info-item {
    background: var(--bg-card); border-radius: var(--radius-md);
    padding: 24px; border: 1px solid var(--border-subtle);
    transition: var(--transition);
}
.contact-info-item:hover { border-color: var(--ouyi-blue-light); }
.contact-info-item h3 { color: var(--white); font-size: 1rem; margin-bottom: 6px; }
.contact-info-item p { color: var(--text-secondary); font-size: 0.9rem; }

/* ===== 页脚 ===== */
.footer {
    background: rgba(15,29,58,0.8); border-top: 1px solid var(--border-subtle);
    padding: 40px 0; text-align: center;
}
.footer p { color: var(--text-muted); font-size: 0.88rem; }
.footer-links { display: flex; gap: 24px; justify-content: center; margin-bottom: 16px; }
.footer-links a { color: var(--text-secondary); font-size: 0.88rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--white); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .cert-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .nav-links { display: none; position: fixed; top: 64px; left: 0; right: 0;
        background: rgba(10,22,40,0.98); flex-direction: column; padding: 24px;
        border-bottom: 1px solid var(--border-subtle); gap: 16px;
    }
    .nav-links.open { display: flex; }
    .hamburger { display: flex; }
    .hero h1 { font-size: 2rem; }
    .market-panel.active { grid-template-columns: 1fr; }
    .platform-grid { grid-template-columns: 1fr; }
    .advantages-grid { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: 1fr; }
    .cert-grid { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .hero-ctas { flex-direction: column; align-items: center; }
    .cta-buttons { flex-direction: column; align-items: center; }
}
@media (max-width: 480px) {
    .hero h1 { font-size: 1.6rem; }
    .page-hero h1 { font-size: 1.8rem; }
    .market-tab { padding: 8px 16px; font-size: 0.85rem; }
}