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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    color: #e0e0e0;
    min-height: 100vh;
}

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

header {
    background: rgba(15, 12, 41, 0.9);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo h1 {
    font-size: 2rem;
    background: linear-gradient(90deg, #00d2ff, #3a7bd5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline;
}

.logo .tagline {
    font-size: 0.9rem;
    color: #aaa;
    margin-left: 10px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav ul li a {
    color: #ccc;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s;
}

nav ul li a:hover {
    background: rgba(0, 210, 255, 0.2);
    color: #fff;
}

.hamburger {
    display: none;
    background: none;
    border: 1px solid #555;
    color: #fff;
    font-size: 1.5rem;
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
}

.hero {
    text-align: center;
    padding: 60px 20px;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(58,123,213,0.1)" d="M0,192L48,176C96,160,192,128,288,138.7C384,149,480,203,576,213.3C672,224,768,192,864,176C960,160,1056,160,1152,176C1248,192,1344,224,1392,240L1440,256L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"/></svg>') no-repeat bottom;
    background-size: cover;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(90deg, #f7971e, #ffd200);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: #bbb;
    margin-bottom: 30px;
}

.search-box {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.search-box input {
    width: 60%;
    max-width: 400px;
    padding: 12px 20px;
    border: none;
    border-radius: 30px;
    background: rgba(255,255,255,0.1);
    color: #fff;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s;
}

.search-box input:focus {
    background: rgba(255,255,255,0.2);
    box-shadow: 0 0 10px rgba(0,210,255,0.3);
}

.search-box button {
    padding: 12px 25px;
    border: none;
    border-radius: 30px;
    background: linear-gradient(90deg, #00d2ff, #3a7bd5);
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.3s;
}

.search-box button:hover {
    transform: scale(1.05);
}

.recommend {
    padding: 20px 0;
}

.recommend-card {
    background: linear-gradient(135deg, rgba(255,215,0,0.2), rgba(255,165,0,0.2));
    border: 1px solid rgba(255,215,0,0.4);
    border-radius: 15px;
    padding: 20px 30px;
    text-align: center;
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}

.recommend-card h3 {
    font-size: 1.5rem;
    color: #ffd700;
    margin-bottom: 10px;
}

.recommend-card a {
    color: #00d2ff;
    text-decoration: underline;
    font-weight: bold;
}

.filters {
    padding: 20px 0;
}

.filters h3 {
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-buttons button {
    padding: 8px 18px;
    border: 1px solid #555;
    border-radius: 20px;
    background: transparent;
    color: #ccc;
    cursor: pointer;
    transition: all 0.3s;
}

.filter-buttons button.active,
.filter-buttons button:hover {
    background: linear-gradient(90deg, #00d2ff, #3a7bd5);
    color: #fff;
    border-color: transparent;
}

.tools-grid {
    padding: 30px 0;
}

#toolCards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.card {
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 20px;
    padding: 25px 20px;
    transition: all 0.4s;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0,210,255,0.2);
    border-color: rgba(0,210,255,0.3);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.card h4 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: #fff;
}

.card p {
    font-size: 0.9rem;
    color: #aaa;
    margin-bottom: 15px;
    line-height: 1.4;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 10px;
}

.tag {
    background: rgba(0,210,255,0.2);
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    color: #00d2ff;
}

.rating {
    font-size: 1rem;
}

.star {
    color: #555;
}

.star.filled {
    color: #ffd700;
}

footer {
    background: rgba(15, 12, 41, 0.9);
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

footer a {
    color: #00d2ff;
    text-decoration: none;
}

.login-container {
    max-width: 400px;
    margin: 100px auto;
    background: rgba(255,255,255,0.05);
    padding: 30px;
    border-radius: 20px;
    text-align: center;
}

.login-container input {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #555;
    border-radius: 10px;
    background: rgba(255,255,255,0.1);
    color: #fff;
}

.login-container button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(90deg, #00d2ff, #3a7bd5);
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
}

.error { color: #ff6b6b; }
.success { color: #51cf66; }

.admin-container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 20px;
    background: rgba(255,255,255,0.05);
    border-radius: 20px;
}

.admin-container table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.admin-container th, .admin-container td {
    padding: 10px;
    border: 1px solid #444;
    text-align: left;
}

.admin-container input {
    width: 100%;
    padding: 8px;
    border: 1px solid #555;
    border-radius: 5px;
    background: rgba(255,255,255,0.1);
    color: #fff;
}

.admin-container button {
    padding: 12px 30px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(90deg, #00d2ff, #3a7bd5);
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background: rgba(15,12,41,0.95);
        padding: 10px 0;
    }

    .nav-links.active {
        display: flex;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .search-box input {
        width: 80%;
    }

    #toolCards {
        grid-template-columns: 1fr;
    }
}

/* 内页通用 */
.page-content {
    padding: 60px 20px;
    min-height: 60vh;
}

.page-content h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #f7971e, #ffd200);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #ccc;
}