/* ==========================================================================
   艾灸传播历史与流派 (OriginOfSchools) 专用样式表 - 新中式极简国潮风
   ========================================================================== */

:root {
    --os-primary-dark: #122319;   /* 深沉墨绿，用于大标题、深色背景 */
    --os-primary: #1C3B2B;        /* 艾叶主绿，代表中草药与自然之源 */
    --os-primary-light: #3D6A52;  /* 柔和绿，用于边框、悬浮辅助 */
    --os-accent-gold: #C5A260;    /* 针灸经络金，用于修饰与尊贵感 */
    --os-accent-gold-rgb: 197, 162, 96;
    --os-accent-orange: #D75525;  /* 灸火橙，代表艾灸的温热与火力 */
    --os-bg-paper: #FAF9F5;       /* 宣纸淡黄，模拟中国古籍纸张感 */
    --os-bg-card: #FFFFFF;
    --os-text-dark: #2B2E2C;      /* 炭黑，主要正文色 */
    --os-text-muted: #6E726F;     /* 灰绿，次要说明色 */
    --os-shadow-sm: 0 4px 12px rgba(28, 59, 43, 0.04);
    --os-shadow-md: 0 10px 30px rgba(28, 59, 43, 0.08);
    --os-shadow-lg: 0 20px 40px rgba(28, 59, 43, 0.12);
    --os-transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

/* 页面包裹与基础 */
.page-wrapper.os-theme-container {
    background-color: var(--os-bg-paper);
    color: var(--os-text-dark);
    font-family: 'PingFang SC', 'Lantinghei SC', 'Microsoft YaHei', Georgia, serif;
    padding-top: 70px;
    overflow-x: hidden;
}

/* 1. 国潮风海报区 (Hero Section) */
.os-hero {
    background: linear-gradient(135deg, var(--os-primary-dark) 0%, #0F1713 100%);
    height: 450px;
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding: 0 20px;
    border-bottom: 3px solid var(--os-accent-gold);
}

/* 墨山水纹理叠加 */
.os-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: radial-gradient(circle at 80% 20%, rgba(197, 162, 96, 0.08) 0%, transparent 50%),
                      radial-gradient(circle at 15% 80%, rgba(61, 106, 82, 0.12) 0%, transparent 60%);
    opacity: 0.8;
    pointer-events: none;
}

.os-hero-tag {
    background: rgba(197, 162, 96, 0.15);
    border: 1px solid var(--os-accent-gold);
    color: var(--os-accent-gold);
    padding: 6px 20px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    margin-bottom: 25px;
    letter-spacing: 3px;
    animation: fadeInDown 0.8s ease;
}

.os-hero h1 {
    font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', serif;
    font-size: 3.4rem;
    margin-bottom: 20px;
    font-weight: 700;
    letter-spacing: 4px;
    background: linear-gradient(to right, #FFF 40%, var(--os-accent-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeInUp 0.8s ease;
}

.os-hero p {
    font-size: 1.2rem;
    max-width: 750px;
    opacity: 0.85;
    line-height: 1.8;
    letter-spacing: 1px;
    animation: fadeInUp 1s ease;
}

/* 2. 科普板块公共标题 (Section Header) */
.os-section {
    padding: 100px 0;
    position: relative;
}

.os-section-header {
    text-align: center;
    margin-bottom: 70px;
    position: relative;
}

.os-section-tag {
    color: var(--os-accent-gold);
    font-size: 0.9rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    display: block;
    margin-bottom: 12px;
    font-weight: 700;
}

.os-section-title {
    font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', serif;
    font-size: 2.6rem;
    color: var(--os-primary-dark);
    margin-bottom: 20px;
    font-weight: 700;
    letter-spacing: 2px;
}

.os-section-line {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--os-accent-orange), var(--os-accent-gold), transparent);
    margin: 0 auto;
}

.os-section-desc {
    margin-top: 25px;
    color: var(--os-text-muted);
    font-size: 1.05rem;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

/* 3. 华夏宗源 · 国际正名模块 (Nomenclature Section) */
.os-nomenclature-section {
    background-color: var(--os-bg-card);
    border-bottom: 1px solid rgba(28, 59, 43, 0.05);
    padding: 95px 20px;
}

.nomenclature-box {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 60px;
}

.nomenclature-text {
    flex: 1.3;
}

.nomenclature-visual {
    flex: 0.7;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.nomenclature-badge-container {
    background: radial-gradient(circle, rgba(197, 162, 96, 0.05) 0%, rgba(28, 59, 43, 0.05) 100%);
    border: 2px dashed rgba(197, 162, 96, 0.3);
    border-radius: 50%;
    width: 290px;
    height: 290px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    box-shadow: var(--os-shadow-sm);
    transition: var(--os-transition);
}

.nomenclature-badge-container:hover {
    transform: rotate(5deg) scale(1.05);
    border-color: var(--os-accent-gold);
    box-shadow: var(--os-shadow-md);
}

/* 印章效果 */
.nomenclature-seal {
    width: 120px;
    height: 120px;
    border: 4px double var(--os-accent-orange);
    border-radius: 14px;
    color: var(--os-accent-orange);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    padding: 8px;
    font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', serif;
    font-weight: 900;
    font-size: 1.7rem;
    line-height: 1.1;
    letter-spacing: 2px;
    text-align: center;
    transform: rotate(-8deg);
    box-shadow: 0 0 15px rgba(215, 85, 37, 0.1);
    user-select: none;
    margin-bottom: 20px;
    background-color: rgba(215, 85, 37, 0.02);
}

.nomenclature-pinyin {
    font-family: Georgia, serif;
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--os-primary-dark);
    letter-spacing: 2px;
    margin: 5px 0 2px 0;
}

.nomenclature-standard {
    font-size: 0.8rem;
    color: var(--os-accent-gold);
    letter-spacing: 3px;
    font-weight: 700;
    text-transform: uppercase;
}

.nomenclature-accent-quote {
    font-size: 1.15rem;
    color: var(--os-primary-light);
    font-weight: 600;
    line-height: 1.7;
    margin-bottom: 25px;
    border-left: 4px solid var(--os-accent-gold);
    padding-left: 15px;
    font-style: italic;
}

.nomenclature-paragraph {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--os-text-dark);
    margin-bottom: 20px;
}

.nomenclature-paragraph strong {
    color: var(--os-primary-dark);
}

.nomenclature-highlight-box {
    background-color: rgba(28, 59, 43, 0.03);
    border-left: 4px solid var(--os-accent-orange);
    padding: 20px 25px;
    border-radius: 0 12px 12px 0;
    margin-top: 25px;
    border-top: 1px solid rgba(28, 59, 43, 0.05);
    border-right: 1px solid rgba(28, 59, 43, 0.05);
    border-bottom: 1px solid rgba(28, 59, 43, 0.05);
}

.nomenclature-hb-title {
    font-weight: 700;
    color: var(--os-accent-orange);
    font-size: 1.1rem;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nomenclature-hb-desc {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--os-text-dark);
    margin: 0;
}

/* 4. 艾灸历史传播长卷 (Interactive Timeline) */
.timeline-container {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    padding: 40px 20px;
}

/* 时间轴垂直中心线 */
.timeline-container::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, 
        rgba(197, 162, 96, 0.1) 0%, 
        var(--os-accent-gold) 15%, 
        var(--os-accent-gold) 85%, 
        rgba(197, 162, 96, 0.1) 100%);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 80px;
    position: relative;
    width: 100%;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

/* 时间轴左右侧分配 */
.timeline-content-wrap {
    width: 45%;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

/* 时间轴中央节点圆圈 */
.timeline-badge {
    position: absolute;
    left: 50%;
    top: 20px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--os-bg-paper);
    border: 4px solid var(--os-accent-gold);
    transform: translateX(-50%);
    z-index: 10;
    box-shadow: 0 0 0 6px rgba(197, 162, 96, 0.15);
    transition: var(--os-transition);
}

.timeline-item:hover .timeline-badge {
    background: var(--os-accent-orange);
    border-color: #FFF;
    box-shadow: 0 0 0 10px rgba(215, 85, 37, 0.2);
    transform: translateX(-50%) scale(1.2);
}

/* 时间轴文本卡片 */
.timeline-card {
    background: var(--os-bg-card);
    border: 1px solid rgba(28, 59, 43, 0.06);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--os-shadow-sm);
    transition: var(--os-transition);
    position: relative;
}

.timeline-card::after {
    content: '';
    position: absolute;
    top: 24px;
    width: 12px;
    height: 12px;
    background: var(--os-bg-card);
    border-top: 1px solid rgba(28, 59, 43, 0.06);
    border-right: 1px solid rgba(28, 59, 43, 0.06);
}

/* 指针方向适配 */
.timeline-item:nth-child(odd) .timeline-card::after {
    right: -7px;
    transform: rotate(45deg);
}

.timeline-item:nth-child(even) .timeline-card::after {
    left: -7px;
    transform: rotate(-135deg);
}

.timeline-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--os-shadow-md);
    border-color: rgba(197, 162, 96, 0.4);
}

.timeline-card:hover::after {
    border-color: rgba(197, 162, 96, 0.4);
}

/* 卡片内部元素 */
.timeline-year {
    font-family: Georgia, serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--os-accent-orange);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.timeline-title {
    font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', serif;
    font-size: 1.3rem;
    color: var(--os-primary-dark);
    margin-bottom: 12px;
    font-weight: 700;
}

.timeline-desc {
    color: var(--os-text-dark);
    font-size: 0.95rem;
    line-height: 1.7;
    margin: 0;
}

/* 5. 地域演变与流派特色 (Regional Schools) */
.schools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.school-card {
    background: var(--os-bg-card);
    border: 1px solid rgba(28, 59, 43, 0.05);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--os-shadow-sm);
    transition: var(--os-transition);
    display: flex;
    flex-direction: column;
    position: relative;
}

/* 顶部右上角超淡半透明背景国家大字水印 */
.school-card::after {
    content: attr(data-region-code);
    position: absolute;
    top: 5px;
    right: 15px;
    font-size: 6.5rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.03);
    font-family: 'Montserrat', 'Helvetica Neue', Arial, sans-serif;
    pointer-events: none;
    z-index: 1;
    line-height: 1;
    letter-spacing: -2px;
}

.school-card-header {
    background: linear-gradient(135deg, var(--os-primary) 0%, var(--os-primary-dark) 100%);
    padding: 35px 30px;
    color: white;
    position: relative;
    border-bottom: 3px solid var(--os-accent-gold);
    z-index: 2;
}

.school-card-header::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at 100% 0%, rgba(197, 162, 96, 0.15) 0%, transparent 60%);
}

.school-region {
    font-size: 0.85rem;
    color: var(--os-accent-gold);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 700;
    margin-bottom: 8px;
    display: block;
}

.school-name {
    font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', serif;
    font-size: 1.6rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: 1px;
}

.school-card-body {
    padding: 30px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

/* 用以强行对齐列表高度的包装器 */
.school-features-wrap {
    min-height: 230px;
    display: flex;
    flex-direction: column;
}

.school-tagline {
    font-size: 1rem;
    font-weight: 700;
    color: var(--os-primary);
    margin-bottom: 20px;
    border-left: 3px solid var(--os-accent-orange);
    padding-left: 10px;
}

.school-feature-list {
    list-style: none;
    padding: 0;
    margin: 0 0 25px 0;
}

.school-feature-list li {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 12px;
    padding-left: 20px;
    position: relative;
    color: var(--os-text-dark);
}

.school-feature-list li::before {
    content: '✦';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--os-accent-gold);
    font-size: 0.85rem;
}

.school-history {
    font-size: 0.9rem;
    color: var(--os-text-muted);
    line-height: 1.7;
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px dashed rgba(28, 59, 43, 0.08);
}

.school-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(28, 59, 43, 0.12), 0 0 0 1px rgba(197, 162, 96, 0.15);
    border-color: rgba(197, 162, 96, 0.4);
}

.school-card:hover .school-card-header {
    border-bottom-color: var(--os-accent-orange);
}

/* 6. 传统技艺检索区美化 (Interactive Tech Finder) */
.core-layout.os-layout-style {
    display: flex;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto 50px auto;
    min-height: 600px;
    background: var(--os-bg-card);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--os-shadow-sm);
    border: 1px solid rgba(28, 59, 43, 0.06);
}

/* 确保全局 container 宽度与上面保持 1200px 绝对统一 */
.os-theme-container .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
    box-sizing: border-box;
}

/* 左侧菜单区 */
.menu-section.os-menu-style {
    width: 300px;
    background: #F4F6F4;
    border-right: 1px solid rgba(28, 59, 43, 0.06);
    padding: 30px 0;
    flex-shrink: 0;
}

.menu-header.os-menu-hdr {
    padding: 0 30px 25px;
    border-bottom: 1px dashed rgba(28, 59, 43, 0.08);
    margin-bottom: 20px;
}

.menu-title.os-menu-t {
    font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', serif;
    font-size: 1.25rem;
    color: var(--os-primary-dark);
    font-weight: 700;
    letter-spacing: 1px;
}

/* 一级菜单样式 */
.menu-wrap.os-wrap {
    padding: 0 15px;
}

.level1-item.os-l1 {
    width: 100%;
    height: 52px;
    line-height: 52px;
    font-size: 1.05rem;
    color: var(--os-text-dark);
    font-weight: 600;
    padding: 0 20px;
    margin-bottom: 10px;
    background: var(--os-bg-card);
    border: 1px solid rgba(28, 59, 43, 0.04);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--os-transition);
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.level1-item.os-l1::after {
    content: '▼';
    color: var(--os-text-muted);
    font-size: 0.8rem;
    transition: transform 0.3s;
}

.level1-item.os-l1:hover {
    background: #EAEFEA;
    color: var(--os-primary);
    border-color: rgba(28, 59, 43, 0.1);
}

.level1-item.os-l1.active {
    background: var(--os-primary);
    color: #FFFFFF;
    border-color: var(--os-primary);
    box-shadow: 0 6px 16px rgba(28, 59, 43, 0.18);
}

.level1-item.os-l1.active::after {
    content: '▼';
    color: #FFFFFF;
    transform: rotate(180deg);
}

/* 二级子菜单包裹区 */
.menu-level2-wrap.os-l2-wrap {
    padding: 0 5px;
    margin: 6px 0 14px 15px;
    border-left: 2px solid rgba(197, 162, 96, 0.3);
}

/* 二级菜单项样式 */
.level2-item.os-l2 {
    width: 100%;
    height: 42px;
    line-height: 42px;
    font-size: 0.95rem;
    color: var(--os-text-dark);
    padding: 0 20px;
    margin-bottom: 6px;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--os-transition);
    text-align: left;
    position: relative;
}

.level2-item.os-l2::before {
    content: '';
    position: absolute;
    left: -2px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: transparent;
    transition: var(--os-transition);
}

.level2-item.os-l2:hover {
    color: var(--os-primary-light);
    background: rgba(61, 106, 82, 0.04);
}

.level2-item.os-l2.active {
    color: var(--os-accent-orange);
    font-weight: 700;
    background: rgba(197, 162, 96, 0.08);
}

.level2-item.os-l2.active::before {
    background: var(--os-accent-orange);
    box-shadow: 0 0 8px var(--os-accent-orange);
    left: -4px;
}

/* 右侧技艺内容展示区 */
.content-section.os-content-style {
    flex: 1;
    padding: 40px 50px;
    background: var(--os-bg-card);
}

.tech-content.os-content-tab {
    display: none;
    width: 100%;
}

.tech-content.os-content-tab.active {
    display: block;
    animation: osFadeIn 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}

@keyframes osFadeIn {
    0% { opacity: 0; transform: translateY(12px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* 右侧卡片网格布局 - 使用自适应最小 320px 以在 800px 宽度下完美并排两列 */
.tech-card-grid.os-grid-style {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
    width: 100%;
}

/* 技艺卡片样式 */
.tech-card.os-card-style {
    background-color: var(--os-bg-card);
    border: 1px solid rgba(28, 59, 43, 0.06);
    border-radius: 12px;
    padding: 25px 28px;
    transition: var(--os-transition);
    cursor: pointer;
    box-shadow: var(--os-shadow-sm);
    position: relative;
    overflow: hidden;
}

/* 卡片左侧线 - 默认常驻浅金，悬停变深橙，极其精致 */
.tech-card.os-card-style::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: rgba(197, 162, 96, 0.25);
    transition: var(--os-transition);
}

.tech-card.os-card-style:hover {
    box-shadow: var(--os-shadow-md);
    transform: translateY(-4px);
    border-color: rgba(197, 162, 96, 0.3);
}

.tech-card.os-card-style:hover::before {
    background: var(--os-accent-orange);
}

/* 卡片标题 */
.tech-card-title.os-card-t {
    font-family: 'Noto Serif CJK SC', 'Source Han Serif SC', serif;
    color: var(--os-primary-dark);
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 15px 0;
    line-height: 1.4;
}

/* 卡片描述 */
.tech-card-desc.os-card-d {
    color: var(--os-text-dark);
    font-size: 0.95rem;
    line-height: 1.7;
    margin: 0;
}

/* 移动端菜单切换按钮 */
.mobile-menu-toggle.os-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    background: var(--os-primary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
    align-items: center;
    justify-content: center;
    transition: var(--os-transition);
}

.mobile-menu-toggle.os-menu-btn:hover {
    background: var(--os-accent-orange);
}

/* 8. 响应式布局优化 (Responsive Design) */

/* 宽屏平板与窄屏电脑 */
@media (max-width: 1024px) {
    .timeline-container::before {
        left: 30px;
    }

    .timeline-item {
        flex-direction: row !important;
        margin-bottom: 60px;
    }

    .timeline-content-wrap {
        width: calc(100% - 60px);
        margin-left: 60px;
    }

    .timeline-badge {
        left: 30px;
        transform: translateX(-50%);
    }

    .timeline-item:hover .timeline-badge {
        transform: translateX(-50%) scale(1.1);
    }

    .timeline-item:nth-child(odd) .timeline-card::after,
    .timeline-item:nth-child(even) .timeline-card::after {
        left: -7px;
        right: auto;
        transform: rotate(-135deg);
    }

    .schools-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
        gap: 30px;
    }

    .tech-card-grid.os-grid-style {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
}

/* 手机设备 */
@media (max-width: 768px) {
    .os-hero {
        height: 450px;
    }

    .os-hero h1 {
        font-size: 2.2rem;
    }

    .os-hero p {
        font-size: 1rem;
    }

    .os-section {
        padding: 60px 0;
    }

    .os-section-title {
        font-size: 2rem;
    }

    /* 技艺检索切换为垂直布局 */
    .core-layout.os-layout-style {
        flex-direction: column;
        min-height: auto;
    }

    .menu-section.os-menu-style {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid rgba(28, 59, 43, 0.08);
        padding: 20px 0;
    }

    .menu-header.os-menu-hdr {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0 20px 15px;
        margin-bottom: 10px;
    }

    .mobile-menu-toggle.os-menu-btn {
        display: flex;
    }

    /* 折叠菜单 */
    .menu-content.os-menu-c {
        max-height: 500px;
        overflow-y: auto;
        transition: max-height 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
        padding: 0 10px;
    }

    .menu-content.os-menu-c.collapsed {
        max-height: 0;
        padding: 0 10px;
    }

    .content-section.os-content-style {
        padding: 30px 20px;
    }

    .tech-card-grid.os-grid-style {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .tech-card.os-card-style {
        padding: 25px;
    }
}

/* 关键帧动画 */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

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