/* ============================================
   农业病虫害智能检测系统 - 高科技风格样式
   未来科技感设计
   ============================================ */

:root {
    /* 颜色集体调亮，解决整体偏暗的问题 */
    --primary-color: #00E5FF;
    --primary-dark: #0099CC;
    --primary-light: #66FFFF;
    --primary-gradient: linear-gradient(135deg, #00FFFF 0%, #0088FF 50%, #B366FF 100%);

    --secondary-color: #00FFE5;
    --accent-color: #B366FF;
    --success-color: #00FF88;
    --warning-color: #FFB800;
    --error-color: #FF3366;

    --bg-primary: #0A0A0F;
    --bg-secondary: #151520;
    --bg-tertiary: #1A1A2E;

    --text-primary: #FFFFFF;
    --text-secondary: #E6EBFF;
    --text-tertiary: #A6B8FF;

    --border-color: rgba(0, 229, 255, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 229, 255, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 229, 255, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 229, 255, 0.4);
    --shadow-glow: 0 0 30px rgba(0, 229, 255, 0.6);
    --shadow-neon: 0 0 20px rgba(0, 229, 255, 0.8), 0 0 40px rgba(0, 136, 255, 0.4);

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

/* 核心修改：让 body 作为容器，不直接贴图 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    position: relative;
    overflow-x: hidden; /* 防止动画引起横向滚动条 */
}

/* 动态背景图层：呼吸缩放动画 (Ken Burns 效果) */
/* 动态背景图层：径向渐变聚焦，弱化边缘背景图 */
body::before {
    content: '';
    position: fixed;
    top: -2%; left: -2%; right: -2%; bottom: -2%;
    /* 核心修改：使用 radial-gradient 让中心稍亮，四周暗沉，把背景图的视觉干扰降到最低 */
    background-image:
        radial-gradient(circle at center, rgba(15, 20, 35, 0.75) 0%, rgba(5, 5, 10, 0.95) 100%),
        url('../image/background.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -2;
    animation: bgBreathe 20s infinite alternate ease-in-out;
}

/* 动态流光与科技网格层：高级科技感网格 */
body::after {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    /* 核心修改：绘制真正的正方形科技网格，而不是斜向流光 */
    background-image:
        linear-gradient(rgba(0, 229, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.04) 1px, transparent 1px);
    background-size: 40px 40px; /* 网格大小 */
    background-position: center center;
    pointer-events: none;
    z-index: -1;
}

.navbar {
    background: rgba(10, 10, 15, 0.85); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color); box-shadow: var(--shadow-md);
    position: sticky; top: 0; z-index: 1000; padding: var(--spacing-sm) var(--spacing-lg);
}

.navbar-container { max-width: 1400px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.navbar-brand { font-size: 1.5rem; font-weight: 700; background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; text-decoration: none; text-shadow: 0 0 20px rgba(0, 229, 255, 0.5); }
.navbar-nav { display: flex; align-items: center; gap: var(--spacing-sm); list-style: none; }
.nav-item { position: relative; }
.nav-link { color: var(--text-secondary); text-decoration: none; padding: var(--spacing-xs) var(--spacing-md); border-radius: var(--radius-md); transition: all var(--transition-normal); font-weight: 500; display: flex; align-items: center; gap: 0.5rem; position: relative; }
.nav-link::before { content: ''; position: absolute; bottom: 0; left: 50%; width: 0; height: 2px; background: var(--primary-gradient); transition: all var(--transition-normal); transform: translateX(-50%); }
.nav-link:hover { color: var(--text-primary); background: rgba(0, 229, 255, 0.1); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.nav-link:hover::before { width: 80%; }
.nav-link.active { color: var(--primary-light); background: rgba(0, 229, 255, 0.15); box-shadow: var(--shadow-sm); }
.nav-link.active::before { width: 80%; }

.container { max-width: 1400px; margin: 0 auto; padding: var(--spacing-lg); position: relative; z-index: 1; }
.container-sm { max-width: 800px; margin: 0 auto; padding: var(--spacing-lg); position: relative; z-index: 1; }
.section { margin-bottom: var(--spacing-xl); }

.card {
    background: rgba(21, 21, 32, 0.7); backdrop-filter: blur(10px);
    border: 1px solid var(--border-color); border-radius: var(--radius-lg);
    padding: var(--spacing-lg); box-shadow: var(--shadow-md); transition: all var(--transition-normal);
    position: relative; overflow: hidden;
}
.card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: var(--primary-gradient); opacity: 0; transition: opacity var(--transition-normal); }
.card:hover { border-color: var(--primary-color); box-shadow: var(--shadow-glow); transform: translateY(-4px); }
.card:hover::before { opacity: 1; }
.card-header { border-bottom: 1px solid var(--border-color); padding-bottom: var(--spacing-md); margin-bottom: var(--spacing-md); }
.card-title { font-size: 1.5rem; font-weight: 700; background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: var(--spacing-xs); text-shadow: 0 0 20px rgba(0, 229, 255, 0.3); }
.card-body { color: var(--text-secondary); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.75rem 1.5rem; border: 1px solid transparent; border-radius: var(--radius-md); font-weight: 600; font-size: 1rem; cursor: pointer; transition: all var(--transition-normal); text-decoration: none; position: relative; overflow: hidden; background: transparent; }
.btn::before { content: ''; position: absolute; top: 50%; left: 50%; width: 0; height: 0; border-radius: 50%; background: rgba(255, 255, 255, 0.1); transform: translate(-50%, -50%); transition: width 0.6s, height 0.6s; }
.btn:hover::before { width: 300px; height: 300px; }
.btn-primary { background: var(--primary-gradient); color: white; box-shadow: var(--shadow-sm); border: 1px solid var(--primary-color); }
.btn-primary:hover { box-shadow: var(--shadow-neon); transform: translateY(-2px); }
.btn-secondary { background: rgba(0, 229, 255, 0.1); color: var(--primary-light); border: 1px solid var(--primary-color); }
.btn-secondary:hover { background: rgba(0, 229, 255, 0.2); box-shadow: var(--shadow-sm); }
.btn-success { background: linear-gradient(135deg, var(--success-color), #00CC66); color: white; border: 1px solid var(--success-color); }
.btn-danger { background: linear-gradient(135deg, var(--error-color), #CC0033); color: white; border: 1px solid var(--error-color); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.form-group { margin-bottom: var(--spacing-md); }
.form-label { display: block; margin-bottom: var(--spacing-xs); color: var(--text-secondary); font-weight: 500; font-size: 0.875rem; }
.form-control { width: 100%; padding: 0.75rem 1rem; background: rgba(21, 21, 32, 0.8); border: 1px solid var(--border-color); border-radius: var(--radius-md); color: var(--text-primary); font-size: 1rem; transition: all var(--transition-fast); }
.form-control:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.2), var(--shadow-sm); background: rgba(21, 21, 32, 1); }
.form-control::placeholder { color: var(--text-tertiary); }

.file-upload-area { border: 2px dashed var(--border-color); border-radius: var(--radius-lg); padding: var(--spacing-xl); text-align: center; transition: all var(--transition-normal); background: rgba(21, 21, 32, 0.4); cursor: pointer; position: relative; }
.file-upload-area::before {
    content: ''; position: absolute; inset: -2px; border-radius: var(--radius-lg); padding: 2px; background: var(--primary-gradient);
    -webkit-mask-image: -webkit-linear-gradient(white, white), -webkit-linear-gradient(white, white);
    -webkit-mask-clip: content-box, border-box; -webkit-mask-composite: xor;
    mask-image: linear-gradient(white, white), linear-gradient(white, white);
    mask-clip: content-box, border-box; mask-composite: exclude;
    opacity: 0; transition: opacity var(--transition-normal);
}
.file-upload-area:hover { border-color: var(--primary-color); background: rgba(21, 21, 32, 0.6); box-shadow: var(--shadow-sm); }
.file-upload-area:hover::before { opacity: 1; }
.file-upload-area.dragover { border-color: var(--primary-color); background: rgba(0, 229, 255, 0.1); box-shadow: var(--shadow-glow); }

.carousel-slide img, .carousel-slide video { width: 100%; display: block; object-fit: cover; border-radius: var(--radius-md); }

.loading { display: inline-block; width: 20px; height: 20px; border: 3px solid rgba(0, 229, 255, 0.3); border-radius: 50%; border-top-color: var(--primary-color); animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 768px) {
    .navbar-container { flex-direction: column; gap: var(--spacing-sm); }
    .navbar-nav { flex-wrap: wrap; justify-content: center; }
    .container { padding: var(--spacing-md); }
    .card { padding: var(--spacing-md); }
}

@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeIn 0.5s ease-out; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--primary-gradient); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary-color); box-shadow: 0 0 10px rgba(0, 229, 255, 0.5); }