/* ===== 现代化高级动态暗黑主题样式 (分离版) ===== */
:root {
    --bn-bg: #181a20;
    --bn-dark: #0b0e11;
    --bn-card: #2b313a;
    --bn-card-hover: #363c4e;
    --bn-yellow: #fcd535;
    --bn-yellow-hover: #f0b90b;
    --bn-text: #eaecef;
    --bn-gray: #848e9c;
    --bn-border: #33383e;
    --bn-green: #0ecb81;
    --bn-red: #f6465d;
    --transition: all 0.25s ease-in-out;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bn-bg);
    color: var(--bn-text);
    line-height: 1.6;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

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

/* 顶端实时行情条 */
.ticker-bar {
    background: var(--bn-dark);
    border-bottom: 1px solid var(--bn-border);
    padding: 8px 0;
    font-size: 13px;
    color: var(--bn-gray);
}
.ticker-content {
    display: flex;
    gap: 40px;
    overflow-x: auto;
    white-space: nowrap;
}
.ticker-item strong { color: #fff; margin-left: 5px; }
.ticker-item span.up { color: var(--bn-green); margin-left: 5px; }
.ticker-item span.down { color: var(--bn-red); margin-left: 5px; }

/* 导航栏 */
.navbar {
    position: sticky;
    top: 0;
    background: rgba(24, 26, 32, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--bn-border);
    z-index: 1000;
    padding: 16px 0;
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-logo {
    display: flex;
    align-items: center;
    font-weight: bold;
    font-size: 1.25rem;
    color: #fff;
}
.nav-logo a {
    display: flex;
    align-items: center;
    gap: 10px;
}
.nav-logo img { height: 32px; }
.nav-actions { display: flex; gap: 15px; align-items: center; }

/* 按钮通用 */
.btn {
    padding: 10px 22px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
    text-align: center;
}
.btn-yellow {
    background-color: var(--bn-yellow);
    color: #181a20;
}
.btn-yellow:hover { background-color: var(--bn-yellow-hover); transform: translateY(-2px); }
.btn-outline {
    border: 1px solid var(--bn-border);
    color: #fff;
}
.btn-outline:hover { border-color: var(--bn-yellow); color: var(--bn-yellow); transform: translateY(-2px); }

/* Hero 区域 */
.hero-section {
    padding: 70px 0 50px;
    background: linear-gradient(180deg, rgba(252,213,53,0.06) 0%, rgba(24,26,32,0) 100%);
}
.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 50px;
    align-items: center;
}
.hero-text h1 {
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: #fff;
}
.hero-text h1 span { color: var(--bn-yellow); }
.hero-text p {
    font-size: 1.1rem;
    color: var(--bn-gray);
    margin-bottom: 30px;
}
.rebate-tag {
    display: inline-block;
    background: rgba(14,203,129,0.1);
    color: var(--bn-green);
    padding: 6px 14px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 20px;
    border: 1px solid rgba(14,203,129,0.2);
}
.hero-cta-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}
.hero-cta-group .btn {
    padding: 14px 30px;
    font-size: 1.05rem;
}

/* 注册卡片框 */
.register-box {
    background: var(--bn-card);
    border: 1px solid var(--bn-border);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    transition: var(--transition);
}
.register-box:hover { border-color: var(--bn-yellow); transform: translateY(-4px); }
.register-box h3 { margin-bottom: 20px; font-size: 1.3rem; color: #fff; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.85rem; color: var(--bn-gray); margin-bottom: 8px; }
.form-control {
    width: 100%;
    padding: 12px 15px;
    background: var(--bn-dark);
    border: 1px solid var(--bn-border);
    border-radius: 6px;
    color: #fff;
    font-size: 1rem;
}
.form-control:focus { border-color: var(--bn-yellow); outline: none; }
.register-box .btn { width: 100%; padding: 14px; font-size: 1rem; }
.register-submit-btn { width: 100%; }

/* 数据指标横幅 */
.stats-section {
    background: var(--bn-dark);
    border-top: 1px solid var(--bn-border);
    border-bottom: 1px solid var(--bn-border);
    padding: 40px 0;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    text-align: center;
}
.stat-item h2 { font-size: 2.2rem; color: var(--bn-yellow); margin-bottom: 5px; }
.stat-item p { color: var(--bn-gray); font-size: 0.95rem; }

/* 交易小工具专区 */
.tools-section {
    padding: 90px 0;
    background: #121418;
}
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { font-size: 2.2rem; color: #fff; margin-bottom: 10px; }
.section-title p { color: var(--bn-gray); font-size: 1.05rem; }

.tools-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}
.tool-card {
    background: var(--bn-card);
    border: 1px solid var(--bn-border);
    border-radius: 12px;
    padding: 25px;
    transition: var(--transition);
}
.tool-card:hover { transform: translateY(-4px); border-color: var(--bn-yellow); }
.tool-card h3 {
    font-size: 1.15rem;
    color: #fff;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.tool-card h3 i { color: var(--bn-yellow); }
.tool-result {
    margin-top: 20px;
    padding: 12px;
    background: var(--bn-dark);
    border-radius: 6px;
    font-size: 0.95rem;
    color: var(--bn-yellow);
    text-align: center;
    font-weight: bold;
}
.tool-mb-group { margin-bottom: 10px; }

/* 平台优势区块 */
.features-section { padding: 90px 0; }
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.feature-card {
    background: var(--bn-card);
    border: 1px solid var(--bn-border);
    border-radius: 10px;
    padding: 35px 30px;
    transition: var(--transition);
}
.feature-card:hover { border-color: var(--bn-yellow); transform: translateY(-5px); }
.feature-icon { font-size: 2rem; color: var(--bn-yellow); margin-bottom: 20px; }
.feature-card h3 { font-size: 1.2rem; margin-bottom: 12px; color: #fff; }
.feature-card p { color: var(--bn-gray); font-size: 0.95rem; line-height: 1.6; }

/* 新手保姆级教程 */
.guide-section {
    background: var(--bn-dark);
    padding: 80px 0;
    border-top: 1px solid var(--bn-border);
}
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.step-card {
    background: var(--bn-card);
    border-radius: 10px;
    padding: 30px;
    position: relative;
    border: 1px solid var(--bn-border);
    transition: var(--transition);
}
.step-card:hover { transform: translateY(-4px); border-color: var(--bn-yellow); }
.step-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: rgba(252, 213, 53, 0.15);
    position: absolute;
    top: 15px; right: 20px;
}
.step-card h3 { margin-bottom: 15px; color: #fff; font-size: 1.15rem; }
.step-card p { color: var(--bn-gray); font-size: 0.9rem; }

/* SEO 内容文章扩充区 */
.seo-article-section {
    padding: 80px 0;
    background: #15171d;
    border-top: 1px solid var(--bn-border);
}
.seo-article-box {
    max-width: 900px;
    margin: 0 auto;
    color: var(--bn-gray);
    font-size: 0.95rem;
}
.seo-article-box h2 { color: #fff; font-size: 1.8rem; margin-bottom: 20px; }
.seo-article-box h3 { color: #fff; font-size: 1.3rem; margin: 25px 0 10px; }
.seo-article-box p { margin-bottom: 15px; line-height: 1.8; }

/* FAQ 区块样式 */
.faq-section {
    padding: 80px 0;
    border-top: 1px solid var(--bn-border);
}
.faq-container { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: var(--bn-card);
    border: 1px solid var(--bn-border);
    border-radius: 8px;
    margin-bottom: 15px;
    padding: 20px 25px;
    transition: var(--transition);
}
.faq-item:hover { border-color: var(--bn-yellow); }
.faq-item h4 { color: #fff; margin-bottom: 8px; font-size: 1.1rem; }
.faq-item p { color: var(--bn-gray); font-size: 0.9rem; }

/* 底部下载与 CTA */
.download-cta {
    padding: 90px 0;
    text-align: center;
    background: radial-gradient(circle at center, rgba(252,213,53,0.08) 0%, transparent 70%);
    border-top: 1px solid var(--bn-border);
}
.download-cta h2 { font-size: 2.3rem; margin-bottom: 15px; color: #fff; }
.download-cta p { color: var(--bn-gray); margin-bottom: 35px; font-size: 1.1rem; }
.download-btns { display: flex; justify-content: center; gap: 20px; }
.store-btn {
    display: flex; align-items: center; gap: 12px;
    background: var(--bn-card); border: 1px solid var(--bn-border);
    padding: 12px 28px; border-radius: 8px; color: #fff; font-weight: 600;
    transition: var(--transition);
}
.store-btn:hover { border-color: var(--bn-yellow); color: var(--bn-yellow); transform: translateY(-3px); }
.store-btn i { font-size: 1.5rem; }

/* 页脚 */
.footer {
    background: var(--bn-dark);
    border-top: 1px solid var(--bn-border);
    padding: 50px 0 30px;
    color: var(--bn-gray);
    font-size: 0.9rem;
}
.footer-flex-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}
.footer-col-title { color: #fff; margin-bottom: 10px; }
.footer-social-icons {
    display: flex;
    gap: 15px;
    font-size: 1.2rem;
}
.footer-disclaimer-text { max-width: 600px; }
.footer-bottom { text-align: center; border-top: 1px solid var(--bn-border); margin-top: 30px; padding-top: 20px; }

/* 响应式适配 */
@media (max-width: 992px) {
    .hero-grid, .features-grid, .steps-grid, .stats-grid, .tools-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .hero-text h1 { font-size: 2.2rem; }
    .stats-grid { gap: 20px; }
}