/* 公共样式文件 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Arial', sans-serif;
}

:root {
    --primary: #00ccff;
    --secondary: #0066ff;
    --accent: #cc00ff;
    --dark: #0a0a16;
    --light: #e0e0ff;
    --gold: #ffd700;
    --silver: #c0c0c0;
    --bronze: #cd7f32;
}

html, body {
    /* 防止背景动画产生水平滚动条 */
    overflow-x: hidden;
}

body {
    background-color: var(--dark);
    color: var(--light);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 粒子背景 */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* 导航栏 */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: rgba(10, 10, 22, 0.7);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 150, 255, 0.3);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 10px rgba(0, 150, 255, 0.5);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    color: #a0a0ff;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    text-shadow: 0 0 10px rgba(0, 204, 255, 0.5);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

/* 主内容区域 */
.main-content {
    flex: 1;
    padding: 120px 5% 80px;
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.page-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(0, 150, 255, 0.5);
    text-align: center;
}

.page-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.3rem);
    margin-bottom: 50px;
    color: #b0b0ff;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* 通用卡片样式 */
.card {
    /* 调整为更“悬浮”且与登录面板一致的样式 */
    background: rgba(255,255,255,0.02);
    border-radius: 15px;
    padding: 30px;
    border: 1px solid rgba(0,255,255,0.08);
    position: relative;
    z-index: 5;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 20px 50px rgba(0,0,0,0.65);
    backdrop-filter: blur(8px);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 204, 255, 0.4);
    box-shadow: 0 10px 30px rgba(0, 150, 255, 0.2);
}

/* 通用图标动画 */
.icon-animate {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* 通用按钮样式 */
.btn {
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    color: var(--dark);
    border: none;
    border-radius: 8px;
    padding: 12px 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 150, 255, 0.4);
    color: var(--dark);
}

/* 通用表单样式 */
.form-input,
.form-textarea,
.form-select {
    background: rgba(10, 10, 22, 0.5);
    border: 1px solid rgba(0, 150, 255, 0.3);
    border-radius: 8px;
    padding: 12px 15px;
    color: var(--light);
    font-size: 1rem;
    transition: all 0.3s ease;
    width: 100%;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(0, 204, 255, 0.3);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-label {
    color: #b0b0ff;
    margin-bottom: 8px;
    font-weight: 500;
    display: block;
}

/* 通用网格布局 */
.grid-auto {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.grid-auto-sm {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        gap: 10px;
        flex-wrap: wrap;
        font-size: 0.9rem;
    }
    
    .grid-auto {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .grid-auto-sm {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .card {
        padding: 20px;
    }
    
    .main-content {
        padding: 120px 3% 60px;
    }
}

@media (max-width: 480px) {
    .nav-links {
        gap: 10px;
        font-size: 0.9rem;
    }
    
    .grid-auto-sm {
        grid-template-columns: 1fr;
    }
}

/* ---- 高科技 登录/主页面 背景与面板样式（共享） ---- */
.tech-bg {
    position:fixed; inset:0; z-index:0; pointer-events:none; overflow: hidden;
    background-image: repeating-linear-gradient(0deg, rgba(0,255,255,0.03) 0 1px, transparent 1px 40px), repeating-linear-gradient(90deg, rgba(0,255,255,0.03) 0 1px, transparent 1px 40px);
    /* 统一为 360s 周期，营造极慢平移的沉稳感 */
    animation: gridShift 360s linear infinite;
    opacity:0.9;
}

@keyframes gridShift { from {background-position:0 0, 0 0;} to {background-position:800px 800px, -800px -800px;} }

.line { position: absolute; width:120%; height:1px; left:-10%; background:linear-gradient(90deg, transparent, rgba(0,255,255,0.06), transparent); filter:blur(6px); animation: slide 360s linear infinite; z-index: 1; pointer-events: none; will-change: transform; }
@keyframes slide { 0%{transform:translateX(-10%);}50%{transform:translateX(10%);}100%{transform:translateX(-10%);} }

.content { position:relative; z-index:2; min-height:100vh; display:flex; align-items:center; justify-content:center; padding:2rem; }

/* 页面主标题（用于 index.php 的 .city-title） */
.city-title {
    width: 100%;
    text-align: center;
    font-size: clamp(2.2rem, 5vw, 3rem);
    margin-bottom: 1rem;
    font-weight: 700;
    background: linear-gradient(45deg, #00ffff, #ff6b6b, #4ecdc4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 面板内部文本样式，确保段落/链接布局一致 */
.card p {
    font-size: 1.05rem;
    line-height: 1.6;
    color: rgba(240,245,255,0.95);
    margin: 0.6rem 0;
}
.card a.button {
    color: #000;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    padding: 0.6rem 1rem;
    border-radius: 8px;
    text-decoration: none;
}

/* 登录专用面板 */
.login-box {
    position:relative; z-index:3; background: rgba(255,255,255,0.02); border:1px solid rgba(0,255,255,0.08); padding:2rem; border-radius:12px; width:100%; max-width:420px; box-shadow: 0 20px 50px rgba(0,0,0,0.65); backdrop-filter: blur(8px);
    animation: floaty 6s ease-in-out infinite;
}

.title { font-size:1.8rem; font-weight:700; margin-bottom:0.2rem; background: linear-gradient(45deg, #00ffff, #4ecdc4); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.subtitle { color:#87ceeb; font-size:0.95rem; }

label { display:block; margin-top:0.8rem; color:#bfefff; font-size:0.95rem; }
input[type="text"], input[type="password"], input[type="number"] { box-sizing:border-box; width:100%; padding:0.6rem; margin-top:0.3rem; border-radius:6px; border:1px solid rgba(255,255,255,0.06); background:rgba(0,0,0,0.25); color:#fff; }

/* 移除数字输入的上下滚动条与浏览器微调器（spinner） */
input[type="number"] { -moz-appearance: textfield; -webkit-appearance: none; appearance: none; overflow: hidden; }
input[type="number"]::-webkit-outer-spin-button, input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

.form-actions { text-align:center; margin-top:1rem; }
.form-actions button, .btn { padding:0.6rem 1.2rem; background:linear-gradient(45deg,#00ffff,#4ecdc4); border:none; color:#000; font-weight:bold; border-radius:8px; cursor:pointer; display:inline-block; }

.error { color:#ff9b9b; margin-top:0.6rem; text-align:center; }
.captcha-note { color:#aee7ff; font-size:0.9rem; margin-top:0.4rem; }

@keyframes floaty { 0%{transform:translateY(0);}50%{transform:translateY(-6px);}100%{transform:translateY(0);} }

@media (max-width:480px) { .login-box { padding:1rem; } }

/* ---- 结束 高科技 登录/主页面 样式 ---- */