/**
 * 广告合作页面 - 现代化样式设计
 * 设计理念：简洁、优雅、现代
 */

/* ==================== 全局样式 ==================== */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #ec4899;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

* {
    box-sizing: border-box;
}

.ad-cooperation-container {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-primary);
    background: var(--bg-light);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ==================== 头部区域 ==================== */
.ad-cooperation-header {
    background: var(--gradient-hero);
    color: white;
    padding: 5rem 0 4rem;
    position: relative;
    overflow: hidden;
}

.ad-cooperation-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.1;
}

.ad-cooperation-header .container {
    position: relative;
    z-index: 1;
}

.ad-cooperation-header h1 {
    font-size: 3rem;
    font-weight: 800;
    margin: 0 0 1rem;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    animation: fadeInDown 0.8s ease-out;
}

.ad-cooperation-header h1 i {
    margin-right: 1rem;
    animation: bounceIn 1s ease-out 0.3s both;
}

.ad-cooperation-header p {
    font-size: 1.25rem;
    opacity: 0.95;
    margin: 0;
    font-weight: 300;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* ==================== 搜索区域 ==================== */
.ad-cooperation-search-section {
    margin-top: -2rem;
    position: relative;
    z-index: 10;
    padding: 0 0 3rem;
}

.ad-cooperation-search-bar {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    padding: 0.75rem;
    display: flex;
    gap: 0.75rem;
    max-width: 700px;
    margin: 0 auto;
    transition: all 0.3s ease;
}

.ad-cooperation-search-bar:focus-within {
    box-shadow: 0 25px 50px -12px rgba(102, 126, 234, 0.4);
    transform: translateY(-2px);
}

#ad-cooperation-searchInput {
    flex: 1;
    border: none;
    outline: none;
    padding: 1rem 1.5rem;
    font-size: 1.0625rem;
    color: var(--text-primary);
    background: transparent;
}

#ad-cooperation-searchInput::placeholder {
    color: var(--text-light);
}

#ad-cooperation-searchButton {
    background: var(--gradient-1);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--radius-xl);
    font-size: 1.0625rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

#ad-cooperation-searchButton:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

#ad-cooperation-searchButton:active {
    transform: translateY(0);
}

#ad-cooperation-searchButton i {
    margin-right: 0.5rem;
}

/* ==================== 主内容区域 ==================== */
.ad-cooperation-main-content {
    padding: 2rem 0 4rem;
}

.ad-cooperation-section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin: 0 0 0.5rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.ad-cooperation-section-subtitle {
    font-size: 1.125rem;
    text-align: center;
    color: var(--text-secondary);
    margin: 0 0 3rem;
    font-weight: 400;
}

/* ==================== 提供商卡片网格 ==================== */
.ad-cooperation-provider-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.ad-cooperation-provider-card {
    background: white;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    display: flex;
    flex-direction: column;
    animation: fadeInUp 0.6s ease-out both;
}

.ad-cooperation-provider-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.ad-cooperation-provider-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.ad-cooperation-provider-card:hover::before {
    opacity: 1;
}

.ad-cooperation-provider-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.ad-cooperation-provider-card:hover img {
    transform: scale(1.05);
}

.ad-cooperation-provider-info {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.ad-cooperation-provider-name {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 0 0.75rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.ad-cooperation-provider-description {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    margin: 0 0 1.25rem;
    line-height: 1.7;
    flex: 1;
}

.ad-cooperation-provider-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.ad-cooperation-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    color: var(--primary-color);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.ad-cooperation-tag:hover {
    background: var(--gradient-1);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
}

.ad-cooperation-learn-more {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    background: var(--gradient-1);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-xl);
    font-weight: 600;
    font-size: 1.0625rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.ad-cooperation-learn-more::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.ad-cooperation-learn-more:hover::before {
    left: 100%;
}

.ad-cooperation-learn-more:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.ad-cooperation-learn-more i {
    margin-left: 0.5rem;
    font-size: 0.875rem;
}

/* ==================== 申请推广区域 ==================== */
.ad-cooperation-apply-section {
    background: white;
    border-radius: var(--radius-2xl);
    padding: 3rem;
    box-shadow: var(--shadow-lg);
    margin-top: 2rem;
    position: relative;
    overflow: hidden;
}

.ad-cooperation-apply-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient-1);
}

.ad-cooperation-apply-section h2 {
    font-size: 2rem;
    font-weight: 800;
    margin: 0 0 2rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.ad-cooperation-apply-section h2 i {
    color: var(--primary-color);
}

.ad-cooperation-apply-section h3 {
    font-size: 1.375rem;
    font-weight: 700;
    margin: 2rem 0 1rem;
    color: var(--text-primary);
}

.ad-cooperation-apply-section ul {
    list-style: none;
    padding: 0;
    margin: 0 0 2rem;
}

.ad-cooperation-apply-section ul li {
    padding: 1rem 0 1rem 2.5rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.7;
    border-bottom: 1px solid var(--border-color);
}

.ad-cooperation-apply-section ul li:last-child {
    border-bottom: none;
}

.ad-cooperation-apply-section ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1.5rem;
    height: 1.5rem;
    background: var(--gradient-1);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.875rem;
}

/* ==================== 联系方式 ==================== */
.ad-cooperation-contact-info {
    margin-top: 1.5rem;
}

.ad-cooperation-contact-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.ad-cooperation-contact-buttons .ad-cooperation-learn-more {
    flex: 0 1 auto;
}

.ad-cooperation-contact-wechat {
    position: relative;
    flex: 0 1 auto;
}

.wechat-info {
    position: absolute;
    top: calc(100% + 1rem);
    left: 0;
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    z-index: 100;
    min-width: 300px;
    border: 1px solid var(--border-color);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.wechat-id-wrapper {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.wechat-id-wrapper p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1.0625rem;
}

.wechat-id-wrapper strong {
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.copy-button {
    background: var(--gradient-3);
    color: white;
    border: none;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.0625rem;
    box-shadow: 0 4px 12px rgba(79, 172, 254, 0.3);
}

.copy-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 172, 254, 0.4);
}

/* ==================== 动画效果 ==================== */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

/* 为卡片添加交错动画 */
.ad-cooperation-provider-card:nth-child(1) { animation-delay: 0.1s; }
.ad-cooperation-provider-card:nth-child(2) { animation-delay: 0.2s; }
.ad-cooperation-provider-card:nth-child(3) { animation-delay: 0.3s; }
.ad-cooperation-provider-card:nth-child(4) { animation-delay: 0.4s; }
.ad-cooperation-provider-card:nth-child(5) { animation-delay: 0.5s; }
.ad-cooperation-provider-card:nth-child(6) { animation-delay: 0.6s; }

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .ad-cooperation-provider-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .ad-cooperation-header {
        padding: 4rem 0 3rem;
    }
    
    .ad-cooperation-header h1 {
        font-size: 2.25rem;
    }
    
    .ad-cooperation-header p {
        font-size: 1.125rem;
    }
    
    .ad-cooperation-search-section {
        margin-top: -1.5rem;
        padding: 0 0 2rem;
    }
    
    .ad-cooperation-search-bar {
        flex-direction: column;
        padding: 1rem;
    }
    
    #ad-cooperation-searchInput {
        padding: 1rem;
    }
    
    #ad-cooperation-searchButton {
        padding: 1rem;
        width: 100%;
    }
    
    .ad-cooperation-section-title {
        font-size: 2rem;
    }
    
    .ad-cooperation-section-subtitle {
        font-size: 1rem;
    }
    
    .ad-cooperation-provider-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .ad-cooperation-apply-section {
        padding: 2rem 1.5rem;
    }
    
    .ad-cooperation-apply-section h2 {
        font-size: 1.5rem;
    }
    
    .ad-cooperation-apply-section h3 {
        font-size: 1.125rem;
    }
    
    .ad-cooperation-contact-buttons {
        flex-direction: column;
    }
    
    .ad-cooperation-contact-buttons .ad-cooperation-learn-more {
        width: 100%;
    }
    
    .wechat-info {
        left: 50%;
        transform: translateX(-50%);
        width: calc(100vw - 3rem);
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .ad-cooperation-header h1 {
        font-size: 1.875rem;
    }
    
    .ad-cooperation-header p {
        font-size: 1rem;
    }
    
    .ad-cooperation-section-title {
        font-size: 1.75rem;
    }
    
    .ad-cooperation-apply-section {
        padding: 1.5rem 1rem;
    }
    
    .ad-cooperation-provider-card img {
        height: 180px;
    }
}

/* ==================== 打印样式 ==================== */
@media print {
    .ad-cooperation-search-section,
    .ad-cooperation-learn-more {
        display: none;
    }
    
    .ad-cooperation-provider-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}

/* ==================== 暗色主题支持（可选）==================== */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --text-light: #9ca3af;
        --bg-light: #111827;
        --bg-white: #1f2937;
        --border-color: #374151;
    }
    
    .ad-cooperation-provider-card,
    .ad-cooperation-apply-section,
    .ad-cooperation-search-bar,
    .wechat-info {
        background: var(--bg-white);
    }
}

/* ==================== 无障碍优化 ==================== */
.ad-cooperation-learn-more:focus,
#ad-cooperation-searchButton:focus,
.copy-button:focus {
    outline: 3px solid rgba(102, 126, 234, 0.5);
    outline-offset: 2px;
}

/* 减少动画（用户偏好）*/
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}