/* ========== 全局基础 ========== */
* { box-sizing: border-box; }

html { height: 100%; }

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

/* 背景层：真实 div #bg-layer 或伪元素，移动端用 dvh 保证不跟随地址栏变化 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background: url('../image/background.webp') center / cover no-repeat;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
    z-index: -1;
    pointer-events: none;
}

a { color: #e91e63; }
a:hover { color: #c2185b; }

code {
    background: rgba(0, 0, 0, 0.06);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.88rem;
    font-family: 'Consolas', 'Monaco', monospace;
}

/* ========== 导航栏 ========== */
.new-nav {
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 0.8rem 1rem;
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.new-nav .nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.new-nav .logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: #333;
    text-decoration: none;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.new-nav .nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0.3rem;
}

.new-nav .nav-links li { position: relative; }

.new-nav .nav-links a {
    color: #555;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.92rem;
    transition: color 0.2s ease;
    position: relative;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
}

.new-nav .nav-links a:hover {
    color: #e91e63;
    background: rgba(233, 30, 99, 0.06);
}

.new-nav .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: #e91e63;
    transition: width 0.25s ease;
    border-radius: 1px;
}

.new-nav .nav-links a:hover::after,
.new-nav .nav-links a.active::after { width: 60%; }

.new-nav .nav-links a.active {
    color: #e91e63;
    background: rgba(233, 30, 99, 0.08);
}

/* ========== 主内容 ========== */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    flex: 1 0 auto;
    width: 100%;
    box-sizing: border-box;
}

h1 {
    font-size: 2.2rem;
    color: #e91e63;
    text-align: center;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.4rem;
    color: #e91e63;
    margin-top: 2rem;
    margin-bottom: 0.8rem;
    padding-bottom: 0.4rem;
    border-bottom: 2px solid #e91e63;
}

h3 {
    font-size: 1.15rem;
    margin-top: 1.5rem;
    margin-bottom: 0.6rem;
    color: #555;
}

h4 {
    font-size: 1rem;
    margin-top: 1.2rem;
    margin-bottom: 0.5rem;
    color: #666;
}

p { margin-bottom: 0.8rem; line-height: 1.8; }

img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

table {
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 1.5rem;
}

th, td {
    padding: 0.8rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th { font-weight: bold; }

/* 返回按钮 */
.back-button {
    display: inline-block;
    margin-bottom: 1rem;
    padding: 0.4rem 1rem;
    background: #e91e63;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.88rem;
    transition: background 0.2s;
    text-decoration: none;
}

.back-button:hover { background: #c2185b; color: #fff; }

/* 成员网格 */
.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

/* ========== 页脚 ========== */
footer {
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 1rem;
    text-align: center;
    margin-top: 2rem;
    font-size: 0.85rem;
    color: #888;
    flex-shrink: 0;
}

/* ========== 通用卡片 ========== */
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.2rem;
    margin: 1.5rem 0;
}

.card {
    background-color: rgba(255, 255, 255, 0.85);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    text-decoration: none;
    color: inherit;
    display: block;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.4rem;
}

.card-description {
    color: #777;
    font-size: 0.88rem;
    line-height: 1.5;
}

/* ========== 板块 ========== */
.knowledge-section {
    margin: 1.5rem 0;
    padding: 1.5rem;
    background-color: rgba(255, 255, 255, 0.75);
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.section-title {
    font-size: 1.3rem;
    color: #e91e63;
    margin-bottom: 0.8rem;
    padding-bottom: 0.4rem;
    border-bottom: 2px solid #e91e63;
}

/* ========== 更新日志 ========== */
.update-item {
    margin: 1.2rem 0;
    padding: 1.2rem 1.5rem;
    background-color: rgba(255, 255, 255, 0.75);
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    border-left: 3px solid #e91e63;
}

.update-item h2 {
    margin-top: 0;
    border-bottom: none;
    font-size: 1.1rem;
}

.update-item p { margin: 0.3rem 0; font-size: 0.92rem; }

hr {
    margin: 0;
    border: 0;
    height: 0;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .new-nav .nav-container { flex-direction: column; gap: 0.5rem; }
    .new-nav .nav-links { flex-wrap: wrap; justify-content: center; }
    main { margin: 0.8rem; padding: 1rem; border-radius: 10px; }
    h1 { font-size: 1.6rem; }
    h2 { font-size: 1.2rem; }
    h3 { font-size: 1.05rem; }
    .card-container { grid-template-columns: 1fr; }
}

/* ========== 深色模式 ========== */
body.dark-mode { color: #e0e0e0; }

body.dark-mode .new-nav { background-color: rgba(25, 25, 25, 0.88); }
body.dark-mode .new-nav .logo { color: #e0e0e0; }
body.dark-mode .new-nav .nav-links a { color: #bbb; }
body.dark-mode .new-nav .nav-links a:hover { color: #f48fb1; background: rgba(233, 30, 99, 0.1); }
body.dark-mode .new-nav .nav-links a.active { color: #f48fb1; background: rgba(233, 30, 99, 0.12); }

body.dark-mode main { background-color: rgba(25, 25, 25, 0.3); }
body.dark-mode footer { background-color: rgba(25, 25, 25, 0.88); color: #888; }

body.dark-mode .card { background-color: rgba(35, 35, 35, 0.8); }
body.dark-mode .card-title { color: #e0e0e0; }
body.dark-mode .card-description { color: #999; }

body.dark-mode .knowledge-section { background-color: rgba(35, 35, 35, 0.6); }
body.dark-mode .update-item { background-color: rgba(35, 35, 35, 0.6); }

body.dark-mode h2, body.dark-mode h3, body.dark-mode h4 { color: #e0e0e0; }
body.dark-mode th, body.dark-mode td { border-bottom-color: #555; }

body.dark-mode code { background: rgba(255, 255, 255, 0.1); color: #f48fb1; }

/* 夜间模式开关 */
.theme-toggle {
    background: none;
    border: 1.5px solid #ccc;
    border-radius: 6px;
    padding: 0.3rem 0.6rem;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    transition: border-color 0.2s, background 0.2s;
    color: #555;
    flex-shrink: 0;
}
.theme-toggle:hover { border-color: #e91e63; background: rgba(233,30,99,0.06); }
body.dark-mode .theme-toggle { border-color: #666; color: #ccc; }
body.dark-mode .theme-toggle:hover { border-color: #f48fb1; background: rgba(233,30,99,0.1); }