/* 每日大赛品牌官网样式表 */
:root {
    --primary-color: #0056b3;
    --secondary-color: #6c757d;
    --accent-color: #ffc107;
    --text-color: #333;
    --bg-color: #f8f9fa;
    --white: #ffffff;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
}

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

/* Header & Navigation */
header {
    background: var(--white);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

nav ul {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: var(--primary-color);
}

/* Search Box (Fake) */
.search-box {
    margin-top: 10px;
    text-align: right;
}

.search-box input {
    padding: 5px 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

/* Banner */
.banner {
    background: url('../images/banner.jpg') no-repeat center center/cover;
    height: 500px;
    display: flex;
    align-items: center;
    color: var(--white);
    text-align: center;
}

.banner-content {
    background: rgba(0, 0, 0, 0.5);
    padding: 40px;
    border-radius: 10px;
    width: 100%;
}

.banner h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.banner p {
    font-size: 20px;
    margin-bottom: 30px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background 0.3s;
}

.btn:hover {
    background: #004494;
}

/* Sections */
section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 32px;
    color: var(--primary-color);
}

/* Grid Layouts */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

/* Cards */
.card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-content {
    padding: 20px;
}

/* Video Cards */
.video-card {
    position: relative;
    cursor: pointer;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.3);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.video-card:hover .video-overlay {
    opacity: 1;
}

.play-btn {
    font-size: 50px;
    color: var(--white);
}

/* Footer */
footer {
    background: #333;
    color: var(--white);
    padding: 40px 0 20px;
    text-align: center;
}

.footer-links {
    margin-bottom: 20px;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    margin: 0 10px;
}

/* Responsive */
@media (max-width: 768px) {
    .banner h1 { font-size: 32px; }
    .nav-container { flex-direction: column; }
    nav ul { margin-top: 15px; }
}