/* Basic Reset & Body Style */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, html {
    height: 100%;
    width: 100%;
    /* 增加中文字体支持 */
    font-family: 'ZCOOL KuaiLe', 'Helvetica Neue', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    overflow: hidden;
    color: #fff;
    
    /* 禁止选中 */
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Background Video Styling */
.video-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

#bg-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Main content container */
.main-container {
    position: relative;
    height: 100%;
    width: 100%;
}

/* Positioning Elements */

.logo {
    position: absolute;
    top: 4vw;
    left: 4vw;
    width: 30vw;
    max-width: 450px;
}

.top-right-icons {
    position: absolute;
    top: 4vw;
    right: 4vw;
    display: flex;
    align-items: center;
}

.top-right-icons .icon-link {
    display: block;
    width: 6vh;
    height: 6vh;
    margin-left: 1.5vw;
}

/* --- Navigation Styles --- */
.main-nav {
    position: absolute;
    top: 30%;
    right: 5vw;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
}

.main-nav a {
    margin: 0.8vh 0;
    width: 28vh; /* 统一宽度 */
    display: block;
    transition: transform 0.2s ease;
}

.main-nav a:hover {
    transform: scale(1.05); /* 悬停效果 */
}

/* SVG 按钮样式 */
.nav-button-svg {
    width: 100%;
    height: auto;
    display: block;
    filter: drop-shadow(0px 2px 4px rgba(0,0,0,0.2));
}

.slogan {
    position: absolute;
    bottom: 12vh;
    left: 5vw;
    width: 35vw;
    max-width: 480px;
}

.downloads {
    position: absolute;
    bottom: 8vh;
    right: 5vw;
    display: flex;
}

.downloads a {
    margin-left: 1.5vw;
    width: 18vh;
}

/* General image style */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
}

/* --- Welcome Overlay Styles --- */
#welcome-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    transition: opacity 0.5s ease;
}

#enter-button {
    padding: 15px 40px;
    font-size: 24px;
    font-weight: bold;
    color: white;
    background-color: #ff5722;
    border: 2px solid white;
    border-radius: 50px;
    cursor: pointer;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
    transition: transform 0.2s ease;
}

#enter-button:hover {
    transform: scale(1.05);
}

/* --- Modal Styles --- */
.modal {
    display: none;
    position: fixed;
    z-index: 101;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.6);
}

.modal-content {
    background: #fdf2e3;
    margin: 15% auto;
    padding: 30px;
    border: 8px solid #fff;
    width: 90%;
    max-width: 500px;
    color: #4a2b16;
    border-radius: 20px;
    font-family: inherit;
    text-align: center;
    position: relative;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.close-btn {
    color: #a46f49;
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 35px;
    font-weight: bold;
    transition: color 0.3s;
}

.close-btn:hover,
.close-btn:focus {
    color: #7c4d2b;
    text-decoration: none;
    cursor: pointer;
}

.modal h2 {
    font-size: 2.5em;
    margin-bottom: 20px;
    color: #d66847;
    text-shadow: 2px 2px #fff;
}

.modal p {
    font-size: 1.2em;
    margin-bottom: 20px;
}

.modal input[type="file"] {
    margin: 20px 0;
    display: inline-block;
}

.modal button {
    padding: 12px 30px;
    font-size: 1.2em;
    font-weight: bold;
    color: white;
    background-color: #f79474;
    border: 3px solid white;
    border-radius: 30px;
    cursor: pointer;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
    transition: transform 0.2s ease;
    font-family: 'ZCOOL KuaiLe', sans-serif;
}

.modal button:hover {
    transform: scale(1.05);
    background-color: #e86b55;
}

#report-list {
    list-style: none;
    padding: 0;
}

#report-list li {
    background: #fff8f0;
    margin: 10px 0;
    padding: 15px;
    border-radius: 10px;
    border: 2px dashed #f79474;
}