/* 每日大赛 品牌官方网站样式表 */
:root {
    --primary-color: #1a73e8;
    --secondary-color: #fbbc05;
    --accent-color: #ea4335;
    --text-color: #333;
    --bg-color: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
}

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

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* Header & Nav */
header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo img {
    height: 50px;
    vertical-align: middle;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Search Bar */
.search-section {
    background: #eee;
    padding: 15px 0;
    text-align: center;
}

.search-box {
    display: flex;
    justify-content: center;
    max-width: 600px;
    margin: 0 auto;
}

.search-box input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px 0 0 4px;
}

.search-box button {
    padding: 10px 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: url('../assets/images/hero_banner.jpg') no-repeat center center/cover;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

/* Video Cards */
.section-title {
    text-align: center;
    margin: 40px 0;
    font-size: 2rem;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.video-card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
    position: relative;
}

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

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255,255,255,0.8);
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.video-card:hover .play-btn {
    display: flex;
}

.video-info {
    padding: 15px;
}

.video-info h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #666;
}

/* Experts Section */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.expert-card {
    text-align: center;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.expert-card img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin-bottom: 15px;
    object-fit: cover;
}

/* FAQ & Reviews */
.faq-item {
    background: white;
    margin-bottom: 10px;
    padding: 15px;
    border-radius: 4px;
}

.review-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.review-item {
    background: #fff;
    padding: 20px;
    border-left: 4px solid var(--primary-color);
}

/* Footer */
footer {
    background: #333;
    color: white;
    padding: 40px 0;
    margin-top: 50px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.footer-bottom {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #555;
}

.qr-codes {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 20px;
}

.qr-item {
    text-align: center;
}

.qr-item img {
    width: 100px;
    height: 100px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .review-grid { grid-template-columns: 1fr; }
}