/* ========================================
   medschoolhell.com - 全局样式
   宠物ins风 | 浅蓝 + 浅粉 + 奶白
   ======================================== */

:root {
    --color-primary: #A8D8EA;      /* 浅蓝 */
    --color-secondary: #F4C2C2;    /* 浅粉 */
    --color-bg: #FFF9F5;           /* 奶白 */
    --color-text: #5A5A5A;         /* 深灰文字 */
    --color-white: #FFFFFF;
    --color-accent: #AA96DA;       /* 淡紫点缀 */
    --shadow-soft: 0 8px 30px rgba(168, 216, 234, 0.3);
    --shadow-hover: 0 15px 40px rgba(244, 194, 194, 0.4);
    --border-radius: 20px;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.8;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* ========================================
   顶部导航栏
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 249, 245, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(168, 216, 234, 0.2);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 30px rgba(168, 216, 234, 0.4);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-text);
}

.logo img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
}

.nav-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transition: var(--transition);
}

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

.nav-link:hover {
    color: var(--color-secondary);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
    padding: 4rem 2rem 2rem;
    margin-top: 5rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
}

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: var(--color-white);
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a:hover {
    color: var(--color-bg);
    padding-left: 5px;
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.footer-bottom {
    max-width: 1400px;
    margin: 3rem auto 0;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    text-align: center;
    font-size: 0.9rem;
}

/* ========================================
   通用动画
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

.animate-in {
    animation: fadeInUp 0.8s ease-out forwards;
}

.float-animation {
    animation: float 3s ease-in-out infinite;
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        right: -100%;
        width: 280px;
        height: calc(100vh - 80px);
        background: var(--color-bg);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
        transition: var(--transition);
    }

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

    .hamburger {
        display: flex;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 1rem;
    }

    .logo {
        font-size: 1.4rem;
    }

    .logo img {
        width: 40px;
        height: 40px;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}