/* --- CSS 变量与全局重置 --- */
:root {
    --primary-color: #FFD700;
    --primary-glow: rgba(255, 215, 0, 0.5);
    --dark-bg: #0c0a18;
    --glass-bg: rgba(22, 19, 44, 0.5);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0b0;
    --status-online: #2ecc71;
    --status-offline: #e74c3c;
    --font-family: 'Exo 2', 'Helvetica Neue', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    background-color: var(--dark-bg);
    color: var(--text-primary);
    font-family: var(--font-family);
    overflow-x: hidden;
    position: relative;
}

/* --- 背景处理：模糊+遮罩 --- */
body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: -2;
    background-image: 
        linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), 
        url('../assets/background.jpg');
    background-size: cover;
    background-position: center;
    filter: blur(4px);
    transform: scale(1.05); 
}

/* --- 动态极光背景 --- */
.aurora-background {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: -1;
    overflow: hidden;
}
.aurora-blob {
    position: absolute;
    width: 50vw; height: 50vw;
    max-width: 600px; max-height: 600px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
    mix-blend-mode: screen;
}
.aurora-blob:nth-child(1) { background: radial-gradient(circle, #ff6b6b, transparent 60%); animation: move1 25s infinite alternate; }
.aurora-blob:nth-child(2) { background: radial-gradient(circle, #48dbfb, transparent 60%); animation: move2 30s infinite alternate-reverse; }
.aurora-blob:nth-child(3) { background: radial-gradient(circle, var(--primary-color), transparent 60%); animation: move3 20s infinite alternate; }
@keyframes move1 { 0% { transform: translate(10vw, 20vh) scale(1.2); } 100% { transform: translate(60vw, 70vh) scale(0.8); } }
@keyframes move2 { 0% { transform: translate(80vw, 10vh) scale(0.9); } 100% { transform: translate(20vw, 80vh) scale(1.1); } }
@keyframes move3 { 0% { transform: translate(40vw, 90vh) scale(1); } 100% { transform: translate(70vw, 5vh) scale(1.3); } }

/* --- 顶部导航栏 --- */
#main-header {
    position: fixed;
    top: 0; left: 0; width: 100%;
    z-index: 100;
    padding: 20px 5%;
    background-color: rgba(12, 10, 24, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}
#main-header nav { display: flex; justify-content: space-between; align-items: center; max-width: 1200px; margin: 0 auto; }
.logo { font-size: 1.8rem; font-weight: 700; color: var(--primary-color); text-decoration: none; animation: subtle-float 5s ease-in-out infinite; }
nav ul { list-style: none; display: flex; align-items: center; gap: 40px; }
nav ul a { color: var(--text-primary); text-decoration: none; font-size: 1rem; position: relative; padding: 5px 0; transition: color 0.3s; }
nav ul a:hover { color: var(--primary-color); }
nav ul a:not(.nav-cta-button)::after {
    content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 2px;
    background-color: var(--primary-color); transform: scaleX(0);
    transform-origin: right; transition: transform 0.3s ease-out;
}
nav ul a:not(.nav-cta-button):hover::after { transform: scaleX(1); transform-origin: left; }

/* --- 新增：导航栏里的行动号召按钮样式 --- */
.nav-cta-button {
    background-color: var(--primary-color);
    color: var(--dark-bg) !important;
    padding: 8px 18px !important;
    border-radius: 20px;
    font-weight: 700;
    transition: all 0.3s;
}
.nav-cta-button:hover {
    color: var(--dark-bg) !important;
    transform: scale(1.05);
    box-shadow: 0 0 15px var(--primary-glow);
}

/* --- 通用板块样式 --- */
.fullscreen-section, .content-section { display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 100px 5%; position: relative; }
.fullscreen-section { min-height: 100vh; }
.content-section { min-height: 60vh; }
.section-title { font-size: 2.8rem; margin-bottom: 20px; color: var(--text-primary); }

/* --- 首屏 Hero Section --- */
.hero-content { animation: subtle-float 6s ease-in-out infinite alternate; }
.subtitle { font-size: 1.5rem; color: var(--text-secondary); font-weight: 300; }
.scroll-down-indicator { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); color: var(--text-secondary); text-decoration: none; display: flex; flex-direction: column; align-items: center; gap: 10px; animation: bounce 2s infinite; }
.scroll-down-indicator i { font-size: 1.5rem; }
@keyframes bounce { 0%, 20%, 50%, 80%, 100% { transform: translateY(0); } 40% { transform: translateY(-15px); } 60% { transform: translateY(-7px); } }

/* --- 服务器状态栏样式 --- */
.server-status-bar {
    margin-top: 40px;
    display: inline-flex;
    gap: 30px;
    align-items: center;
    padding: 15px 30px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 12px;
    color: var(--text-secondary);
}
.status-item { display: flex; align-items: center; gap: 10px; font-size: 1rem; }
.status-item i { color: var(--primary-color); font-size: 1.2rem; }
.status-dot-wrapper { display: inline-block; width: 12px; height: 12px; }
.status-dot { display: block; width: 100%; height: 100%; border-radius: 50%; transition: background-color 0.5s; }
.status-dot.online { background-color: var(--status-online); animation: pulse 1.5s infinite; }
.status-dot.offline { background-color: var(--status-offline); }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.7); } 70% { box-shadow: 0 0 0 10px rgba(46, 204, 113, 0); } 100% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0); } }

/* --- 特色 Features Section --- */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; max-width: 1200px; width: 100%; margin-top: 50px; }
.feature-card { background: var(--glass-bg); border: 1px solid var(--glass-border); backdrop-filter: blur(10px); border-radius: 15px; padding: 40px 30px; transition: transform 0.3s, box-shadow 0.3s; }
.feature-card:hover { transform: translateY(-10px); box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3), 0 0 20px var(--primary-glow); }
.feature-card i { font-size: 3rem; color: var(--primary-color); margin-bottom: 20px; }
.feature-card h3 { font-size: 1.5rem; margin-bottom: 15px; }
.feature-card p { color: var(--text-secondary); line-height: 1.6; }

/* --- 关于我们 About Section --- */
.info-list { background: var(--glass-bg); border: 1px solid var(--glass-border); backdrop-filter: blur(10px); border-radius: 15px; padding: 30px 40px; max-width: 800px; text-align: left; }
.info-list p { font-size: 1.2rem; line-height: 2; color: var(--text-secondary); }

/* --- 加入我们 Join Section --- */
#join { background-color: rgba(0,0,0,0.2); }
.join-content p { font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 40px; max-width: 600px; }
.button-container { display: flex; gap: 20px; flex-wrap: wrap; justify-content: center; }
.cta-button {
    background: var(--primary-color); color: var(--dark-bg); padding: 15px 35px; font-size: 1.2rem;
    font-weight: 700; text-decoration: none; border-radius: 50px; border: 2px solid var(--primary-color);
    transition: all 0.3s ease; display: flex; align-items: center; gap: 10px;
}
.cta-button:hover { background: transparent; color: var(--primary-color); box-shadow: 0 0 25px var(--primary-glow); }

/* --- 故障与动画 --- */
.glitch { font-size: 6rem; font-weight: 700; color: var(--text-primary); position: relative; }
.glitch::before, .glitch::after { content: attr(data-text); position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: transparent; overflow: hidden; clip: rect(0, 0, 0, 0); }
.glitch::before { left: 2px; text-shadow: -2px 0 var(--primary-color); animation: glitch-anim-1 2s infinite linear alternate-reverse; }
.glitch::after { left: -2px; text-shadow: -2px 0 #48dbfb, 2px 2px #ff6b6b; animation: glitch-anim-2 2s infinite linear alternate-reverse; }
@keyframes glitch-anim-1 { 0% { clip: rect(42px, 9999px, 44px, 0); } 100% { clip: rect(25px, 9999px, 99px, 0); } }
@keyframes glitch-anim-2 { 0% { clip: rect(65px, 9999px, 119px, 0); } 100% { clip: rect(79px, 9999px, 42px, 0); } }

.animate-on-scroll { opacity: 0; transform: translateY(30px); transition: opacity 0.8s ease-out, transform 0.8s ease-out; }
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }
@keyframes subtle-float { 0% { transform: translateY(0px); } 50% { transform: translateY(-5px); } 100% { transform: translateY(0px); } }

/* --- 页脚 --- */
footer { padding: 30px 5%; text-align: center; color: var(--text-secondary); font-size: 0.9rem; background-color: var(--dark-bg); }

/* --- 响应式适配 --- */
@media (max-width: 768px) {
    .glitch { font-size: 3.5rem; }
    .subtitle { font-size: 1.2rem; }
    .section-title { font-size: 2.2rem; }
    nav ul { display: none; } /* 在手机上简单隐藏，未来可做成汉堡菜单 */
    .server-status-bar { flex-direction: column; gap: 15px; padding: 20px; width: 80%; }
    .button-container { flex-direction: column; }
}