:root {
    --primary-color: #2ecc71;
    --secondary-color: #27ae60;
    --accent-color: #e74c3c;
    --text-color: #2c3e50;
    --bg-overlay: rgba(255, 255, 255, 0.9);
    --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 搜索建议容器 */
.suggestions-container {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    width: 100%;
    background: var(--bg-overlay);
    border-radius: 1rem;
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(10px);
    max-height: 300px;
    overflow-y: hidden;
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition-fast);
    pointer-events: none;
    z-index: 2147483646;
    /* 确保在预览卡片下方 */
}

.suggestions-container.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}

.suggestion-item {
    padding: 1rem;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition-fast);
}

.suggestion-item:hover {
    background: rgba(46, 204, 113, 0.1);
    border-radius: 1rem;
}

/* 优化后的预览卡片 */
.preview-card {
    position: fixed;
    width: 280px;
    background: var(--bg-overlay);
    border-radius: 1rem;
    box-shadow: var(--card-shadow);
    padding: 1rem;
    backdrop-filter: blur(10px);
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition-fast);
    pointer-events: none;
    z-index: 2147483647;
    isolation: auto;
}


.preview-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: linear-gradient(rgba(46, 204, 113, 0.1), rgba(39, 174, 96, 0.1)),
        url('https://img-baofun.zhhainiao.com/fs/3fc54f2b553dc552c23fd2df0ee0159e.jpg') fixed center/cover;
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    backdrop-filter: blur(2px);
}


.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 2rem;
    opacity: 0;
    animation: fadeIn 0.6s var(--transition-medium) forwards;
}

/* 优化后的引擎菜单 */
.engine-menu {
    position: relative;
    z-index: 100;
}

.engine-btn {
    width: 100%;
    height: 58px;
    background: var(--bg-overlay);
    border: 0px solid var(--primary-color);
    border-radius: 2rem;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    backdrop-filter: blur(4px);
    font-weight: 600;
    color: var(--text-color);
}

.engine-list {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    width: 100%;
    background: var(--bg-overlay);
    border-radius: 1rem;
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(10px);
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition-fast);
    pointer-events: none;
}

.engine-list.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}

.engine-item {
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.engine-item:hover {
    background: rgba(46, 204, 113, 0.1);
    border-radius: 1rem;
}

/* 搜索区域 */
.search-box {
    position: relative;
    margin: 4rem;
    display: grid;
    grid-template-columns: 1fr 3fr 1fr;
    gap: 1rem;
    max-width: 700px;
    margin-inline: auto;
    transition: var(--transition-fast);
}

.search-box:focus-within {
    grid-template-columns: 1fr 5fr 1fr;
    max-width: 800px;
}

.search-box input,
.search-box button {
    height: 56px;
    border: 0px solid var(--primary-color);
    border-radius: 2rem;
    font-size: 1.1rem;
    transition: var(--transition-fast);
    padding: 0 1.5rem;
    background: var(--bg-overlay);
    backdrop-filter: blur(4px);
}

.search-box input {
    width: 100%;
    box-shadow: 0 4px 12px rgba(46, 204, 113, 0.1);
}

.search-box input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 12px rgba(46, 204, 113, 0.2);
}

.search-box button {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 600;
    letter-spacing: 1px;
    cursor: pointer;
}

.search-box button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(46, 204, 113, 0.3);
}

/* 常用链接 */
.favorites {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    position: relative;
    z-index: 1;
}

.favorites-card {
    background: var(--bg-overlay);
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(8px);
    transform: translateY(20px);
    opacity: 0;
    animation: cardSlide 0.6s var(--transition-medium) forwards;
    z-index: 1;
}

.favorites-card h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
}

.button-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    position: relative;
}

.button {
    position: relative;
    padding: 1.2rem;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 1rem;
    color: var(--text-color);
    text-decoration: none;
    overflow: hidden;
    transition: var(--transition-fast);
    box-shadow: 0 5px 8px rgba(0, 0, 0, 0.05);
}

.button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(46, 204, 113, 0.15);
}


@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

@keyframes cardSlide {
    to {
        transform: translateY(0);
        opacity: 1;
    }
}