/* 阿特发大健康产业联盟平台 - 前端样式 */

:root {
    --color-primary: #000000;
    --color-secondary: #ffffff;
    --color-gold: #d4af37;
    --color-gray: #6c757d;
    --color-light-gray: #f8f9fa;
    --color-border: #dee2e6;
    --color-text: #212529;
    --color-text-light: #6c757d;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: #ffffff;
}

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

/* Header */
.header {
    background: #000000;
    color: #ffffff;
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: #d4af37;
    text-decoration: none;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav a {
    color: #ffffff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s;
}

.nav a:hover,
.nav a.active {
    color: #d4af37;
}

.user-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.btn {
    padding: 8px 20px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
}

.btn-primary {
    background: #000000;
    color: #ffffff;
}

.btn-primary:hover {
    background: #d4af37;
}

.btn-gold {
    background: #d4af37;
    color: #000000;
}

.btn-gold:hover {
    background: #b8941f;
}

.btn-outline {
    background: transparent;
    color: #ffffff;
    border: 1px solid #ffffff;
}

.btn-outline:hover {
    background: #ffffff;
    color: #000000;
}

/* Main Content */
.main {
    min-height: calc(100vh - 200px);
    padding: 40px 0;
}

/* Footer */
.footer {
    background: #000000;
    color: #ffffff;
    padding: 40px 0 20px;
    margin-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3 {
    color: #d4af37;
    margin-bottom: 15px;
    font-size: 18px;
}

.footer-section a {
    color: #ffffff;
    text-decoration: none;
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
}

.footer-section a:hover {
    color: #d4af37;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 14px;
    color: rgba(255,255,255,0.6);
}

/* Cards */
.card {
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    transition: box-shadow 0.3s;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #000000;
}

.card-text {
    color: var(--color-text-light);
    font-size: 14px;
    line-height: 1.6;
}

/* Grid */
.grid {
    display: grid;
    gap: 20px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Section */
.section {
    margin-bottom: 60px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 30px;
    text-align: center;
    color: #000000;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: #d4af37;
    margin: 15px auto 0;
}

/* Form */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #000000;
}

.form-control {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #d4af37;
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .section-title {
        font-size: 24px;
    }
}