/* ========================================
   PinLoveBird - 全局样式表
   花店简约风 | 纯白 + 浅绿 + 浅粉
   ======================================== */

:root {
    --color-white: #ffffff;
    --color-light-green: #e8f5e9;
    --color-medium-green: #a5d6a7;
    --color-deep-green: #4caf50;
    --color-light-pink: #fce4ec;
    --color-medium-pink: #f48fb1;
    --color-deep-pink: #ec407a;
    --color-text-dark: #2c3e50;
    --color-text-light: #7f8c8d;
    --color-bg-cream: #fafafa;
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-lg: 16px;
    --border-radius-md: 12px;
    --border-radius-sm: 8px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: var(--color-white);
    color: var(--color-text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ========================================
   导航栏样式
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    transition: var(--transition-smooth);
    padding: 20px 0;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-soft);
    padding: 15px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-deep-green);
    letter-spacing: 2px;
}

.logo span {
    color: var(--color-deep-pink);
}

.nav-menu {
    display: flex;
    gap: 35px;
}

.nav-menu a {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-dark);
    position: relative;
    padding: 8px 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-medium-green), var(--color-medium-pink));
    transition: var(--transition-smooth);
}

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

.nav-menu a:hover {
    color: var(--color-deep-green);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-text-dark);
    transition: var(--transition-smooth);
}

/* ========================================
   页脚样式
   ======================================== */

.footer {
    background: linear-gradient(135deg, var(--color-light-green) 0%, var(--color-light-pink) 100%);
    padding: 80px 0 40px;
    margin-top: 100px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 50px;
    margin-bottom: 60px;
}

.footer-section h3 {
    font-size: 20px;
    color: var(--color-deep-green);
    margin-bottom: 25px;
    font-weight: 600;
}

.footer-section p {
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 15px;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: var(--color-text-light);
    font-size: 14px;
}

.footer-section ul li a:hover {
    color: var(--color-deep-pink);
    padding-left: 8px;
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    color: var(--color-text-light);
    font-size: 14px;
}

/* ========================================
   动画效果
   ======================================== */

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* ========================================
   响应式设计
   ======================================== */

@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .container {
        padding: 0 25px;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--color-white);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 50px;
        gap: 30px;
        transition: var(--transition-smooth);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 20px;
    }
}

/* ========================================
   通用组件样式
   ======================================== */

.btn {
    display: inline-block;
    padding: 14px 35px;
    background: linear-gradient(135deg, var(--color-medium-green), var(--color-deep-green));
    color: var(--color-white);
    border-radius: 30px;
    font-weight: 600;
    font-size: 15px;
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(76, 175, 80, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-deep-green);
    color: var(--color-deep-green);
    box-shadow: none;
}

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

.section-title {
    font-size: 42px;
    text-align: center;
    margin-bottom: 20px;
    color: var(--color-text-dark);
    font-weight: 700;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    font-size: 18px;
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition-smooth);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.card-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.card-content {
    padding: 25px;
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text-dark);
}

.card-text {
    color: var(--color-text-light);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 18px;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--color-text-light);
}