/* 
 * 乐华互联建站有限公司 - 全局样式
 * 美甲简约风：奶白 + 亮粉 + 浅灰
 */

/* CSS Reset & 基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.8;
    color: #4a4a4a;
    background-color: #fdfcfa;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul, ol {
    list-style: none;
}

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

/* 颜色变量 */
:root {
    --primary-pink: #ffb6c1;
    --light-pink: #ffe4e8;
    --cream-white: #fdfcfa;
    --light-gray: #f5f5f5;
    --medium-gray: #9e9e9e;
    --dark-gray: #4a4a4a;
    --text-color: #333333;
    --border-color: #e8e8e8;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(253, 252, 250, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.4s ease;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 30px rgba(255, 182, 193, 0.15);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 45px;
    width: auto;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark-gray);
    letter-spacing: 1px;
}

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

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

.nav-menu li {
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-pink), #ff9eb5);
    transition: width 0.3s ease;
}

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

.nav-menu a:hover,
.nav-menu a.active {
    color: #ff8fa3;
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: var(--dark-gray);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* 移动端导航 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--cream-white);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 60px;
        gap: 0;
        transition: left 0.4s ease;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        width: 100%;
        text-align: center;
    }

    .nav-menu a {
        padding: 20px 0;
        font-size: 18px;
        border-bottom: 1px solid var(--border-color);
        width: 100%;
        display: block;
    }

    .nav-menu a::after {
        display: none;
    }
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #faf9f8 0%, #f5f0ef 100%);
    padding: 60px 0 30px;
    margin-top: 80px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary-pink);
}

.footer-section p,
.footer-section li {
    font-size: 14px;
    color: var(--medium-gray);
    line-height: 2.2;
}

.footer-section ul li a:hover {
    color: var(--primary-pink);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 25px;
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: var(--medium-gray);
}

/* 通用按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 35px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-pink), #ff9eb5);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 182, 193, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 182, 193, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--dark-gray);
    border: 2px solid var(--primary-pink);
}

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

/* 卡片样式 */
.card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.4s ease;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(255, 182, 193, 0.15);
}

/* 渐入动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* 页面过渡 */
.page-transition {
    animation: pageFadeIn 0.5s ease;
}

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

/* 响应式调整 */
@media (max-width: 992px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-menu {
        gap: 25px;
    }
}

@media (max-width: 576px) {
    body {
        font-size: 14px;
    }
    
    .logo-text {
        font-size: 20px;
    }
    
    .btn {
        padding: 12px 28px;
        font-size: 14px;
    }
}