*,
*::before,
*::after {
    box-sizing: border-box;
}

:root {
    --color-bg: #f0f2f5;
    --color-surface: #ffffff;
    --color-primary: #1abc9c;
    --color-primary-dark: #16a085;
    --color-accent: #2c3e50;
    --color-text: #2c3e50;
    --shadow-soft: 0 0 15px rgba(0, 0, 0, 0.08);
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
        Arial, sans-serif;
    line-height: 1.6;
    background: var(--color-bg);
    color: var(--color-text);
    scroll-behavior: smooth; /* 平滑滚动 */
}

/* 顶部大图区域 */

.header {
    position: relative;
    padding: 80px 20px;
    text-align: center;
    background: url("background1.jpg") center / cover no-repeat;
    color: #ffffff;
    min-height: 300px;
    overflow: hidden;
}

.header::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.header-logo {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 80px;
    height: 80px;
    z-index: 3;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 5px;
    backdrop-filter: blur(5px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.header-logo:hover {
    transform: scale(1.05);
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
}

.header-logo img {
    width: 100%;
    height: 100%;
    border-radius: 5px;
    object-fit: cover;
}

/* 用户菜单（右上角） */

.user-menu {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 3;
    display: flex;
    align-items: center;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 0, 0, 0.4);
    padding: 6px 12px;
    border-radius: 18px;
    color: #ecf0f1;
}

.user-info span {
    font-size: 14px;
}

.login-btn,
.logout-btn {
    border: none;
    border-radius: 18px;
    padding: 6px 14px;
    cursor: pointer;
    background: var(--color-primary);
    color: #ffffff;
    font-size: 14px;
    transition: background 0.2s ease, transform 0.1s ease;
}

.login-btn:hover,
.logout-btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

.header h1,
.header p {
    position: relative;
    z-index: 2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.header h1 {
    font-size: 40px;
    margin-bottom: 10px;
    margin-top: 40px;
}

.header p {
    margin: 0;
    font-size: 18px;
}

/* 顶部导航栏 */

.top-nav {
    background: var(--color-accent);
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 10;
}

.top-nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 4px;
}

.top-nav a {
    color: #ffffff;
    text-decoration: none;
    padding: 8px 16px;
    margin: 4px;
    border-radius: 20px;
    transition: background 0.2s ease, transform 0.1s ease;
    font-size: 14px;
}

.top-nav a:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

.top-nav a.active {
    background: var(--color-primary);
}

/* 布局容器 */

.page {
    padding: 20px 15px 40px;
}

.row {
    display: flex;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto;
    gap: 20px;
}

.side {
    flex: 1 1 280px;
    background-color: #f9f9f9;
    padding: 20px;
    box-shadow: var(--shadow-soft);
    border-radius: 12px;
}

.main {
    flex: 2 1 480px;
    background-color: var(--color-bg);
    padding: 0;
}

/* 卡片 & Section */

.section {
    margin-bottom: 20px;
}

.section-title {
    font-size: 22px;
    border-left: 4px solid var(--color-primary);
    padding-left: 10px;
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 18px;
    margin: 15px 0 8px;
    color: var(--color-accent);
}

.card {
    background-color: var(--color-surface);
    padding: 15px 20px;
    margin-bottom: 15px;
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
}

.realimg {
    width: 100%;
    max-width: 100%;
    border-radius: 10px;
    margin: 12px 0;
    display: block;
}

.qr-img {
    width: 60%;
    max-width: 400px;
    margin: 0 auto 15px;
}

/* 列表样式 */

ul {
    padding-left: 20px;
    margin-top: 5px;
}

ol {
    padding-left: 20px;
    margin-top: 5px;
}

.link-list {
    list-style: none;
    padding-left: 0;
}

.link-list li {
    margin-bottom: 8px;
}

.link-list a {
    color: var(--color-accent);
    text-decoration: none;
}

.link-list a:hover {
    text-decoration: underline;
}

/* 地址区 */

.address-section {
    margin-top: 20px;
    background-color: var(--color-surface);
    padding: 20px;
    box-shadow: var(--shadow-soft);
    border-radius: 12px;
}

.address-content p {
    margin: 6px 0;
}

/* 受保护内容样式 */

.protected-badge {
    display: inline-block;
    background: var(--color-primary);
    color: #ffffff;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    margin-left: 10px;
}

/* 默认隐藏，登录后通过 JS 加 .is-visible 显示 */
.protected-content {
    display: none;
}

.protected-content.is-visible {
    display: block;
}

/* 获奖条目 */

.award-item + .award-item {
    margin-top: 20px;
    border-top: 1px dashed #ddd;
    padding-top: 15px;
}

/* 页脚 */

.footer {
    padding: 20px;
    text-align: center;
    background: var(--color-accent);
    color: #ffffff;
    margin-top: 30px;
}

/* 登录模态框 */

.modal {
    display: none; /* 通过 JS 控制显示 */
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.is-open {
    display: flex;
}

.modal-content {
    position: relative;
    background: #ffffff;
    padding: 25px 20px;
    border-radius: 12px;
    width: 90%;
    max-width: 360px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.modal h2 {
    text-align: center;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.modal-close {
    position: absolute;
    top: 8px;
    right: 10px;
    border: none;
    background: transparent;
    font-size: 22px;
    cursor: pointer;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 8px;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 14px;
}

.submit-btn {
    width: 100%;
    padding: 10px;
    background: var(--color-primary);
    border: none;
    color: #ffffff;
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
    margin-top: 10px;
}

.submit-btn:hover {
    background: var(--color-primary-dark);
}

.error-message {
    color: #e74c3c;
    font-size: 13px;
    margin-top: 5px;
}

/* 响应式 */

@media (max-width: 900px) {
    .row {
        flex-direction: column;
    }

    .header {
        padding: 60px 15px;
    }

    .header h1 {
        font-size: 32px;
    }
}

@media (max-width: 480px) {
    .header {
        min-height: 260px;
    }

    .header h1 {
        font-size: 26px;
    }

    .header p {
        font-size: 14px;
    }

    .top-nav a {
        font-size: 13px;
        padding: 6px 10px;
    }

    .header-logo {
        width: 60px;
        height: 60px;
    }
}