/* ========================================
   统一导航栏样式
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1.5rem 4rem;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-left {
    display: flex;
    align-items: center;
}

.nav.scrolled {
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 4rem;
    border-bottom: 1px solid var(--border);
}

.nav-links {
    display: flex;
    gap: 3rem;
}

.nav-link {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* ========================================
   统一Logo样式
   ======================================== */
.logo {
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: 1.75rem;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: color 0.3s ease;
}

.logo:hover {
    color: var(--accent);
}

/* ========================================
   统一页脚样式
   ======================================== */
.footer {
    padding: 2rem 4rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-primary);
}

.footer-text {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 2px;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-link {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: var(--accent);
}

/* ========================================
   统一按钮样式
   ======================================== */
.btn {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    background: transparent;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn:hover {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--bg-primary);
}

.btn-primary {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--text-primary);
}

.btn-accent {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--text-primary);
}

.btn-accent:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

/* ========================================
   统一卡片样式
   ======================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

/* ========================================
   统一标题样式
   ======================================== */
.section-title {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

/* ========================================
   Toast 提示样式
   ======================================== */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 1rem 2rem;
    background: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--bg-primary);
    transform: translateX(150%);
    transition: transform 0.3s var(--transition-ease-out);
    z-index: 10000;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    background: var(--text-primary);
}

.toast.error {
    background: var(--accent);
    color: var(--text-primary);
}

/* ========================================
   页面过渡动画
   ======================================== */
.page-enter {
    opacity: 0;
    animation: pageFadeIn 0.5s ease forwards;
}

@keyframes pageFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   滚动进度条
   ======================================== */
.nav-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--accent);
    width: 0%;
    z-index: 1001;
    transition: width 0.1s linear;
}

/* ========================================
   公共页面布局
   ======================================== */
.page-content {
    padding: 120px 4rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
    min-height: 100vh;
}

.page-header {
    text-align: center;
    margin-bottom: 4rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.page-title {
    font-family: var(--font-pixel);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

.page-subtitle {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 2px;
}

/* ========================================
   公共表单样式
   ======================================== */
.form-group {
    position: relative;
}

.form-input {
    width: 100%;
    padding: 16px 0;
    font-family: var(--font-mono);
    font-size: 1rem;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    outline: none;
    transition: all 0.3s var(--transition-smooth);
}

.form-input:focus {
    border-color: var(--text-primary);
}

.form-label {
    position: absolute;
    left: 0;
    top: 16px;
    font-size: 1rem;
    color: var(--text-dim);
    pointer-events: none;
    transition: all 0.3s var(--transition-smooth);
}

.form-input:focus + .form-label,
.form-input:not(:placeholder-shown) + .form-label {
    top: -8px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

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

.btn-submit {
    font-family: var(--font-pixel);
    font-size: 0.75rem;
    padding: 20px 40px;
    background: var(--text-primary);
    border: none;
    color: var(--bg-primary);
    cursor: pointer;
    transition: all 0.3s var(--transition-smooth);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 20px;
}

.btn-submit:hover {
    background: transparent;
    color: var(--text-primary);
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.2);
}

/* ========================================
   公共筛选按钮
   ======================================== */
.filter-btn {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--bg-primary);
}

/* ========================================
   响应式调整
   ======================================== */
@media (max-width: 1200px) {
    .nav {
        padding: 1.5rem 2rem;
    }
    
    .nav-links {
        gap: 2rem;
    }
    
    .footer {
        padding: 1.5rem 2rem;
    }

    .page-content {
        padding: 100px 2rem 3rem;
    }
}

@media (max-width: 768px) {
    .nav {
        padding: 1rem 1.5rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .footer {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
        padding: 1.5rem;
    }

    .page-content {
        padding: 80px 1.5rem 2rem;
    }
}