/* ========================================
   重庆仁仁餐饮管理有限公司 - 全局样式
   日式侘寂原木亚麻风格
   ======================================== */

:root {
    /* 大地色系 - 低饱和侘寂风 */
    --color-sand: #E8E4D9;
    --color-linen: #D9D2C5;
    --color-clay: #C4B5A0;
    --color-wood: #A89F91;
    --color-stone: #8B7D6B;
    --color-earth: #6B5D52;
    --color-charcoal: #4A4238;
    --color-ink: #2C2620;
    
    /* 强调色 */
    --color-accent: #B8956B;
    --color-highlight: #D4AF87;
    
    /* 间距系统 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* 圆角系统 - 圆形元素 */
    --radius-circle: 50%;
    --radius-large: 30px;
    --radius-medium: 20px;
    --radius-small: 10px;
    
    /* 过渡动画 */
    --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-fast: all 0.2s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: "Hiragino Sans GB", "Microsoft YaHei", "PingFang SC", sans-serif;
    background-color: var(--color-sand);
    color: var(--color-ink);
    line-height: 1.8;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

/* ========================================
   顶部导航栏
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-sm) var(--spacing-md);
    transition: var(--transition-smooth);
    background: transparent;
}

.header.scrolled {
    background: rgba(232, 228, 217, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(107, 93, 82, 0.1);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-circle {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-circle);
    background: linear-gradient(135deg, var(--color-accent), var(--color-highlight));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.5rem;
}

.logo-text {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-ink);
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    position: relative;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.95rem;
    color: var(--color-charcoal);
    font-weight: 500;
    letter-spacing: 1px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transform: translateX(-50%);
    transition: var(--transition-smooth);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--color-ink);
    transition: var(--transition-fast);
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: var(--color-ink);
    color: var(--color-sand);
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-md);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-highlight);
    font-weight: 600;
}

.footer-section p,
.footer-section a {
    color: var(--color-linen);
    line-height: 2;
    font-size: 0.9rem;
}

.footer-section a:hover {
    color: var(--color-highlight);
}

.footer-bottom {
    border-top: 1px solid var(--color-stone);
    padding-top: var(--spacing-md);
    text-align: center;
    color: var(--color-wood);
    font-size: 0.85rem;
}

/* ========================================
   通用组件
   ======================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--color-ink);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    letter-spacing: 3px;
}

.section-title p {
    color: var(--color-stone);
    font-size: 1rem;
    letter-spacing: 2px;
}

.btn {
    display: inline-block;
    padding: 15px 35px;
    border-radius: var(--radius-large);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 1px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-highlight));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(184, 149, 107, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
}

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

/* ========================================
   动画效果
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-smooth);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--color-sand);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transition: var(--transition-smooth);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .section-title h2 {
        font-size: 1.8rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .logo-text {
        font-size: 1rem;
    }
    
    .logo-circle {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }
}