/* ============================================
   友情链接页面专属样式
   基于 main.css 变量体系
   ============================================ */

/* hero 区域 */
.friends-hero {
    position: relative;
    padding: var(--space-3xl) 0;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.friends-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 70%);
    animation: friendsFloat 6s ease-in-out infinite;
}

.friends-hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.08) 0%, transparent 70%);
    animation: friendsFloat 8s ease-in-out infinite reverse;
}

@keyframes friendsFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.friends-hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.friends-hero-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
    font-size: 2rem;
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-glow);
    animation: friendsScaleIn 0.6s ease forwards;
}

@keyframes friendsScaleIn {
    from { transform: scale(0.5); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.friends-hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    line-height: 1.2;
}

.friends-hero-title .gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: friendsGradientShift 3s ease infinite;
}

@keyframes friendsGradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.friends-hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 内容区块 */
.friends-section {
    padding: var(--space-3xl) 0;
}

.friends-section.bg-alt {
    background: var(--bg-secondary);
}

/* 区域标题 */
.section-header-inline {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.section-header-inline i {
    color: var(--primary);
}

.section-header-inline::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border-color), transparent);
    margin-left: var(--space-md);
}

/* 搜索过滤栏 */
.search-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    align-items: center;
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.search-box-inline {
    position: relative;
    flex: 1;
    min-width: 240px;
}

.search-box-inline input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    padding-left: 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.search-box-inline input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.search-box-inline i {
    position: absolute;
    left: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* 筛选组 */
.filter-group {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.filter-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.filter-group select {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-group select:focus {
    outline: none;
    border-color: var(--primary);
}

/* 小按钮（覆盖 main.css 的 .btn 以适配搜索栏） */
.btn-sm {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

/* 友链卡片网格 */
.links-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-xl);
}

/* 友链卡片 */
.link-card {
    position: relative;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.link-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.link-card:hover::before {
    opacity: 1;
}

/* 卡片头部 */
.link-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.link-logo-wrap {
    flex-shrink: 0;
}

.link-logo {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    object-fit: cover;
    border: 2px solid var(--border-color);
    transition: border-color var(--transition-fast);
}

.link-card:hover .link-logo {
    border-color: var(--primary-light);
}

.link-info {
    flex: 1;
    min-width: 0;
}

.link-info h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.link-category {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    touch-action: manipulation;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.link-category:hover {
    background: var(--primary);
    color: var(--text-inverse);
    border-color: var(--primary);
}

/* 卡片描述 */
.link-desc {
    flex: 1;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 卡片底部 */
.link-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-light);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.visit-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--primary);
    font-weight: 500;
    font-size: 0.85rem;
    text-decoration: none;
    transition: all var(--transition-fast);
    touch-action: manipulation;
}

.visit-link:hover {
    color: var(--primary-dark);
    transform: translateX(2px);
}

/* 交换友链卡片 */
.exchange-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.exchange-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.exchange-card-header > i {
    font-size: 1.5rem;
    color: var(--primary);
}

.exchange-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.exchange-card-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.exchange-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.exchange-info-item {
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
}

.exchange-info-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.exchange-info-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    word-break: break-all;
}

.exchange-copy-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-xl);
    background: var(--primary);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--space-lg);
    touch-action: manipulation;
}

.exchange-copy-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.exchange-copy-btn.copied {
    background: #22c55e;
}

.exchange-html-block {
    position: relative;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    overflow-x: auto;
}

.exchange-html-copy {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    background: var(--primary);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    touch-action: manipulation;
}

.exchange-html-copy:hover {
    background: var(--primary-dark);
}

.exchange-html-copy.copied {
    background: #22c55e;
}

/* 申请区域 */
.apply-section {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid var(--border-color);
}

.apply-header {
    margin-bottom: var(--space-xl);
}

.apply-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--space-sm);
}

.apply-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 var(--space-md);
}

.status-check-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--primary);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
    touch-action: manipulation;
}

.status-check-link:hover {
    color: var(--primary-dark);
}

/* 表单样式 */
.apply-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.apply-form .form-group {
    margin-bottom: var(--space-lg);
}

.apply-form .form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.apply-form .form-control {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
    box-sizing: border-box;
}

.apply-form .form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.apply-form textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.required {
    color: #ef4444;
}

.error-message {
    font-size: 0.8rem;
    color: #ef4444;
    margin-top: 4px;
    min-height: 1.2em;
}

.char-count {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: right;
    margin-top: 4px;
}

.checkbox-option {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.checkbox-option input[type="checkbox"] {
    margin-top: 3px;
    accent-color: var(--primary);
}

.checkbox-option label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.form-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    touch-action: manipulation;
}

.form-link:hover {
    text-decoration: underline;
}

.form-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
    margin-top: var(--space-xl);
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    animation: modalFadeIn 0.3s ease-out;
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--bg-primary);
    margin: 5% auto;
    padding: 0;
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease-out;
    border: 1px solid var(--border-color);
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: translateY(-50px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text-inverse);
    padding: var(--space-lg) var(--space-xl);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.3rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-inverse);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    touch-action: manipulation;
}

.modal-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.modal-body {
    padding: var(--space-xl);
    color: var(--text-primary);
}

.modal-body h4 {
    margin: var(--space-lg) 0 var(--space-sm);
    color: var(--primary);
    font-size: 1.1rem;
}

.modal-body h4:first-child {
    margin-top: 0;
}

.modal-body ul {
    margin: 0 0 var(--space-md) var(--space-lg);
    padding: 0;
}

.modal-body li {
    margin-bottom: 6px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.modal-body p {
    margin: 6px 0;
    line-height: 1.6;
    color: var(--text-secondary);
}

.modal-footer {
    padding: var(--space-md) var(--space-xl);
    background: var(--bg-secondary);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
    display: flex;
    justify-content: flex-end;
    border-top: 1px solid var(--border-color);
}

/* toast 动画 */
@keyframes toastSlideIn {
    from { opacity: 0; transform: translateX(100px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes toastSlideOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(100px); }
}

/* 响应式 */
@media (max-width: 768px) {
    .friends-hero {
        padding: var(--space-2xl) 0;
    }

    .friends-hero-title {
        font-size: 1.75rem;
    }

    .friends-hero-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    .links-container {
        grid-template-columns: 1fr;
    }

    .search-filter-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box-inline {
        min-width: auto;
    }

    .filter-group {
        width: 100%;
    }

    .filter-group select {
        flex: 1;
    }

    .apply-form .form-row {
        grid-template-columns: 1fr;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }

    .link-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }
}

@media (max-width: 480px) {
    .friends-hero-title {
        font-size: 1.5rem;
    }

    .apply-section {
        padding: var(--space-lg);
    }

    .modal-content {
        margin: 10% auto;
        width: 95%;
    }

    .modal-header, .modal-body, .modal-footer {
        padding: var(--space-md);
    }
}

/* 减弱动效偏好 */
@media (prefers-reduced-motion: reduce) {
    .friends-hero::before,
    .friends-hero::after,
    .friends-hero-icon {
        animation: none;
    }

    .friends-hero-title .gradient-text {
        animation: none;
    }

    .link-card {
        transition: none;
    }

    .link-card:hover {
        transform: none;
    }

    .modal,
    .modal-content {
        animation: none;
    }
}