/* 
 * Project: Modern Gentleman Style Guide
 * Description: Custom styles for layout, typography, and micro-interactions.
 * Complements Tailwind CSS framework.
 */

/* 字体引入 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root {
    --color-primary: #1A1A1A;
    --color-white: #FFFFFF;
    --color-sand: #E8E3D6;
    --color-fog: #F5F5F5;
    --color-copper: #B87333;
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础设置 */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--color-white);
    color: var(--color-primary);
    line-height: 1.6;
}

/* 布局容器 */
.container-custom {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

/* 文本排版 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    letter-spacing: -0.02em;
}

/* 导航样式 */
.nav-link {
    position: relative;
    color: var(--color-primary);
    text-decoration: none;
    padding-bottom: 2px;
    transition: color 0.3s ease;
}

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

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

/* 英雄区域动态背景过渡 */
.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
    background-size: cover;
    background-position: center;
}

.hero-slide.active {
    opacity: 1;
}

/* 图片卡片微交互 */
.card-hover {
    overflow: hidden;
    transition: var(--transition-base);
}

.card-hover img {
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-hover:hover img {
    transform: scale(1.03);
}

.card-hover:hover {
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
}

/* 按钮样式 */
.btn-primary {
    display: inline-block;
    padding: 0.75rem 2rem;
    background-color: var(--color-primary);
    color: var(--color-white);
    border: 1px solid var(--color-primary);
    transition: var(--transition-base);
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--color-primary);
}

.btn-outline {
    display: inline-block;
    padding: 0.75rem 2rem;
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    transition: var(--transition-base);
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* 页面过渡动画 */
.fade-in {
    animation: fadeIn 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    opacity: 0;
    transform: translateY(10px);
}

.fade-delay-1 { animation-delay: 0.1s; }
.fade-delay-2 { animation-delay: 0.2s; }
.fade-delay-3 { animation-delay: 0.3s; }

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 骨架屏加载动画 */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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

/* 页脚规范 */
.footer-minimal {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-top: 1px solid #E0E0E0;
    background-color: var(--color-white);
    color: #888888;
    font-size: 14px;
}

/* 辅助类 */
.text-copper { color: var(--color-copper); }
.bg-sand { background-color: var(--color-sand); }
.bg-fog { background-color: var(--color-fog); }

/* 滚动条美化 (Webkit) */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #ccc;
}

::-webkit-scrollbar-thumb:hover {
    background: #999;
}