landinglandinglandinglandinglandingHero/* 联盟官网 (landing.html) 专用样式 */

/* 动画定义 */
@keyframes shimmer { 0% { transform: translate(-100%, -100%) rotate(45deg); } 100% { transform: translate(100%, 100%) rotate(45deg); } }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes pulse { 50% { opacity: .5; } }

/* 基础设置 */
html { scroll-behavior: smooth; }
body { background-color: #f8fafc; color: #0f172a; font-family: ui-sans-serif, system-ui, sans-serif; }
.perspective-1000 { perspective: 1000px; }
svg.lucide { width: 1em; height: 1em; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(2deg); }
}

.logo-sphere-active {
    animation: float 5s ease-in-out infinite;
}

/* 导航栏 - 恢复到最稳健的 Flex 布局 */
.navbar {
    position: fixed;
    width: 100%;
    z-index: 60;
    transition: all 0.3s;
    background: transparent;
    padding: 1.25rem 0; /* 初始内边距 */
}

.navbar-scrolled {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    padding: 0.5rem 0; /* 滚动后稍微收缩 */
    border-bottom: 1px solid #f1f5f9;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.navbar-container {
    max-width: 80rem;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo 样式 - 放大但不使用绝对定位，避免布局走样 */
.navbar-logo {
    height: 4.5rem; /* 保持您要求的大尺寸 */
    width: auto;
    object-fit: contain;
    display: block;
}

.nav-links {
    display: none;
}

@media (min-width: 1024px) {
    .nav-links {
        display: flex;
        align-items: center;
        gap: 2.5rem;
        font-size: 1.125rem; /* 保持较大的菜单字体 */
        font-weight: 700;
        color: #475569;
    }
}

.nav-link:hover { color: #2563eb; transition: color 0.2s; }

/* Hero 区域 */
.hero-section {
    position: relative;
    padding-top: 6rem;
    padding-bottom: 4rem;
    overflow: hidden;
    background-color: #f8fafc;
}

 
.bg-hero{background-image: url("../images/hero-banner.jpg"); background-size: cover}
.bg-clip-text{color: #000}
.title-f{ }
 
@media (min-width: 1024px) {
    .hero-section { padding-top: 9rem; padding-bottom: 5rem; }
}

.hero-container {
    max-width: 80rem;
    margin: 0 auto;
    padding: 0 1.5rem;
    position: relative;
}

.hero-flex {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
}

@media (min-width: 1024px) {
    .hero-flex { flex-direction: row; gap: 5rem; }
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: -0.025em;
    margin-bottom: 2rem;
    line-height: 1.3;
    color: #0f172a;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 4.5rem;
        line-height: 1.1 !important;
    }
}

.hero-subtitle {
    font-size: 1.125rem;
    color: #475569;
    margin-bottom: 3rem;
    line-height: 1.625;
    font-weight: 500;
    max-width: 36rem;
    border-left: 4px solid #3b82f6;
    padding: 0.5rem 0 0.5rem 1.5rem;
}

/* 按钮样式 */
.btn-primary {
    background-color: #2563eb;
    color: white;
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    font-weight: 700;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.2);
}

.btn-primary:hover { background-color: #1d4ed8; transform: translateY(-1px); }

/* 3D Logo 球体 */
.logo-sphere-container {
    position: relative;
    width: 24rem;
    height: 24rem;
    background: white;
    border-radius: 9999px;
    box-shadow: 0 50px 100px -20px rgba(0, 0, 0, 0.2);
    border: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.logo-sphere-img {
    width: 20rem;
    height: 18rem;
    object-fit: contain;
    padding: 0.5rem;
    transition: transform 0.7s;
}

/* 页脚渐变 */
.footer-gradient {
    background: linear-gradient(to right, #1d4ed8, #059669);
    color: white;
    padding: 6rem 0 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}