* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "PingFang SC", "Microsoft Yahei", sans-serif;
    scroll-behavior: smooth;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

:root {
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 30px;
    --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.banner {
    width: 100%;
    height: 100vh;
    padding-top: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--gradient-light);
    position: relative;
    overflow: hidden;
    text-align: center;
}

.banner h1 {
    font-size: 86px;
    font-weight: 900;
    letter-spacing: 18px;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--text-main) 0%, var(--text-gray) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.search-desc {
    font-size: 20px;
    color: var(--text-gray);
    margin-bottom: 30px;
}

.search-group {
    display: flex;
    gap: 14px;
    align-items: center;
    margin-bottom: 20px;
    z-index: 2;
    position: relative;
}

.search-input {
    width: 460px;
    height: 56px;
    padding: 0 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-main);
    font-size: 16px;
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--text-main);
}

.search-btn {
    height: 56px;
    padding: 0 36px;
    border-radius: var(--radius-lg);
    background: var(--text-main);
    color: var(--white);
    font-size: 16px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    opacity: 0.85;
    transform: translateY(-2px);
}

.result-box {
    max-width: 600px;
    padding: 20px 30px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    text-align: left;
    display: none;
    margin-top: 20px;
    z-index: 2;
    position: relative;
}

.result-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.result-code {
    font-size: 14px;
    color: var(--text-gray);
    margin-bottom: 10px;
    font-family: monospace;
}

.result-desc {
    font-size: 15px;
    line-height: 1.6;
}

.empty-tip {
    color: var(--text-gray);
    margin-top: 16px;
    display: none;
}

@media (max-width:768px) {
    .banner h1 {
        font-size: 40px;
        letter-spacing: 6px;
    }
    .search-group {
        flex-direction: column;
        width: 90%;
    }
    .search-input {
        width: 100%;
    }
}