/* ========================================
   小袋鼠自助空间系统 - 全局样式
   设计方向：专业科技感 B2B SaaS
   ======================================== */

/* ---- 颜色变量 ---- */
:root {
    --bg-warm: #FAF7F0;
    --bg-cream: #FEF9EC;
    --surface: #FFFFFF;
    --text-primary: #1C1917;
    --text-secondary: #78716C;
    --text-muted: #A8A29E;
    --primary: #F1DB24;
    --primary-dark: #E5C812;
    --accent-tech: #D97706;
    --border: #E7E5E4;
    --dark: #1C1917;
}

/* ---- 基础 ---- */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-warm);
    line-height: 1.7;
    overflow-x: hidden;
}

/* ---- 滚动条 ---- */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ---- 导航 ---- */
.site-nav {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: all 0.4s ease;
}

.site-nav.scrolled {
    background: rgba(255, 255, 255, 0.98);
    border-bottom-color: var(--border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

/* ---- 导航链接 ---- */
.nav-link {
    position: relative;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    border-radius: 6px;
    transition: all 0.25s ease;
}

.nav-link:hover {
    color: var(--accent-tech);
    background: rgba(241, 219, 36, 0.08);
}

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

/* ---- 按钮系统 ---- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--primary);
    color: var(--dark);
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: all 0.25s ease;
    letter-spacing: 0.02em;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(241, 219, 36, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(241, 219, 36, 0.2);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: 6px;
    border: 1.5px solid var(--border);
    cursor: pointer;
    transition: all 0.25s ease;
    letter-spacing: 0.02em;
}

.btn-secondary:hover {
    border-color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.02);
}

/* ---- 内容区域 ---- */
.section-padding {
    padding: 4rem 1rem;
}

@media (min-width: 768px) {
    .section-padding {
        padding: 5rem 1.5rem;
    }
}

@media (min-width: 1024px) {
    .section-padding {
        padding: 6rem 2rem;
    }
}

/* ---- 标题排版 ---- */
.heading-xl {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.heading-lg {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.heading-md {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 600;
    line-height: 1.25;
}

/* ---- 分隔符（科技细线）---- */
.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
    margin: 3rem 0;
}

/* ---- 图片处理 ---- */
.image-hover {
    overflow: hidden;
    border-radius: 8px;
}

.image-hover img {
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.image-hover:hover img {
    transform: scale(1.04);
}

/* ---- 表单输入 ---- */
.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: 6px;
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: all 0.25s ease;
    outline: none;
}

.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(241, 219, 36, 0.15);
}

.form-input::placeholder {
    color: var(--text-muted);
}

/* ---- 页面头部 Hero ---- */
.page-hero {
    padding: 4rem 1rem 3rem;
    background: var(--bg-cream);
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(241, 219, 36, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

@media (min-width: 768px) {
    .page-hero {
        padding: 5rem 1.5rem 4rem;
    }
}

/* ---- GSAP 动画辅助类 ---- */
.gsap-reveal {
    opacity: 0;
    transform: translateY(24px);
}

.gsap-reveal-left {
    opacity: 0;
    transform: translateX(-30px);
}

.gsap-reveal-right {
    opacity: 0;
    transform: translateX(30px);
}

.gsap-scale {
    opacity: 0;
    transform: scale(0.95);
}

/* ---- 移动端菜单 ---- */
.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    z-index: 40;
    padding-top: 80px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-menu-overlay.open {
    opacity: 1;
    visibility: visible;
}

/* ---- Footer ---- */
.site-footer {
    background: var(--dark);
    color: #A8A29E;
}

.site-footer a {
    color: #D6D3D1;
    transition: color 0.2s ease;
}

.site-footer a:hover {
    color: var(--primary);
}

/* ---- 内容卡片 ---- */
.content-card {
    background: var(--surface);
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.content-card:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(241, 219, 36, 0.15);
}

/* ---- 标签 ---- */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    background: var(--bg-cream);
    color: var(--accent-tech);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 6px;
}

/* ---- 面包屑 ---- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.breadcrumb a:hover {
    color: var(--accent-tech);
}

/* ---- 响应式工具 ---- */
@media (max-width: 767px) {
    .hide-mobile {
        display: none !important;
    }
}

@media (min-width: 768px) {
    .show-mobile {
        display: none !important;
    }
}

/* ---- 骨架屏 Skeleton Loading ---- */
.skeleton {
    background: linear-gradient(
        90deg,
        #f0f0f0 25%,
        #e0e0e0 50%,
        #f0f0f0 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: 4px;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-text {
    height: 1rem;
    margin-bottom: 0.5rem;
}

.skeleton-title {
    height: 1.5rem;
    width: 60%;
    margin-bottom: 1rem;
}

.skeleton-image {
    width: 100%;
    height: 200px;
    border-radius: 8px;
}

.skeleton-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

/* ---- 移动端优化 Mobile Optimizations ---- */
@media (max-width: 767px) {
    /* 优化触摸目标大小 */
    .btn-primary,
    .btn-secondary,
    .nav-link {
        min-height: 44px; /* iOS推荐最小触摸区域 */
        min-width: 44px;
    }
    
    /* 防止水平滚动 */
    body {
        overflow-x: hidden;
    }
    
    /* 优化文字可读性 */
    h1 { font-size: 2rem !important; }
    h2 { font-size: 1.75rem !important; }
    h3 { font-size: 1.25rem !important; }
    
    /* 优化间距 */
    .section-padding {
        padding: 3rem 1rem !important;
    }
    
    /* 优化网格布局 */
    .grid {
        gap: 1rem !important;
    }
    
    /* 优化图片 */
    img {
        max-width: 100%;
        height: auto;
    }
    
    /* 优化表单输入 */
    input, textarea, select {
        font-size: 16px !important; /* 防止iOS自动缩放 */
    }
    
    /* 优化卡片 */
    .content-card {
        padding: 1rem !important;
    }
    
    /* 优化Hero区域 */
    .page-hero {
        padding: 3rem 1rem 2rem !important;
    }
    
    /* 隐藏桌面端元素 */
    .hide-mobile {
        display: none !important;
    }
}

/* ---- 平板优化 Tablet Optimizations ---- */
@media (min-width: 768px) and (max-width: 1023px) {
    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}