:root {
    --bg: #f8fafc;
    --card: #fff;
    --text: #1e293b;
    --sub: #64748b;
    --c1: #4f46e5;
    --c2: #06b6d4;
    --bd: #e2e8f0;
}
.dark {
    --bg: #0f172a;
    --card: #1e293b;
    --text: #f1f5f9;
    --sub: #94a3b8;
    --bd: #334155;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: system-ui, sans-serif;
    transition: all 0.2s ease;
}

html, body {
    width: 100%;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: min(5vw, 2rem);
}

/* 导航栏 */
.nav {
    width: 100%;
    background: var(--card);
    padding: min(4vw, 1rem) min(5vw, 2rem);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--bd);
    flex-wrap: wrap;
    gap: 1rem;
}

.nav a {
    color: var(--text);
    text-decoration: none;
    font-size: 1rem;
    padding: 0.3rem 0.2rem;
}

.nav .title {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    background: linear-gradient(90deg, var(--c1), var(--c2));
    -webkit-background-clip: text;
    color: transparent;
    font-weight: 600;
}

.theme {
    width: clamp(32px, 8vw, 38px);
    height: clamp(32px, 8vw, 38px);
    border-radius: 50%;
    border: 1px solid var(--bd);
    background: var(--bg);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 公告 */
.notice {
    background: var(--card);
    padding: min(4vw, 1rem);
    border-radius: 12px;
    margin: 1rem 0;
    border: 1px solid var(--bd);
    width: 100%;
}

/* 广告 */
.ad {
    background: var(--card);
    padding: min(4vw, 1rem);
    border-radius: 12px;
    text-align: center;
    margin: 1rem 0;
    border: 1px dashed var(--c2);
    width: 100%;
}

/* 快捷导航 */
.quick {
    display: flex;
    gap: 0.8rem;
    overflow-x: auto;
    padding: 1rem 0;
    width: 100%;
    scrollbar-width: none;
}
.quick::-webkit-scrollbar { display: none; }

.quick a {
    background: var(--card);
    padding: 0.7rem 1.1rem;
    border-radius: 12px;
    white-space: nowrap;
    text-decoration: none;
    color: var(--text);
    border: 1px solid var(--bd);
    font-size: 0.95rem;
    flex-shrink: 0;
}

/* 搜索 */
.search {
    width: 100%;
    padding: clamp(0.8rem, 3vw, 1.1rem) clamp(1rem, 4vw, 1.3rem);
    border-radius: 16px;
    border: 1px solid var(--bd);
    background: var(--card);
    color: var(--text);
    font-size: clamp(1rem, 3vw, 1.1rem);
    outline: none;
    margin-bottom: 1.5rem;
}

/* 分类 */
.cat {
    margin-bottom: clamp(1.5rem, 6vw, 3rem);
    width: 100%;
}
.cat h3 {
    font-size: clamp(1.1rem, 4vw, 1.4rem);
    margin-bottom: 1rem;
    padding-left: 0.8rem;
    border-left: 4px solid var(--c2);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 网格布局 · 全自适应 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(clamp(140px, 25vw, 180px), 1fr));
    gap: clamp(0.7rem, 3vw, 1.2rem);
    width: 100%;
}

.item {
    background: var(--card);
    border-radius: 14px;
    padding: clamp(0.9rem, 4vw, 1.2rem);
    display: flex;
    align-items: center;
    gap: 0.7rem;
    text-decoration: none;
    color: var(--text);
    border: 1px solid var(--bd);
    min-height: 60px;
}
.item:hover {
    transform: translateY(-2px);
    border-color: var(--c2);
}
.item img {
    width: clamp(22px, 6vw, 28px);
    height: clamp(22px, 6vw, 28px);
    border-radius: 6px;
    flex-shrink: 0;
}
.item span {
    font-size: clamp(0.9rem, 3vw, 1rem);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 盒子 */
.box, .admin-box {
    background: var(--card);
    border-radius: 16px;
    padding: clamp(1.2rem, 6vw, 2.2rem);
    margin-top: 1.5rem;
    border: 1px solid var(--bd);
    width: 100%;
}

/* 表单 */
input, button, select, textarea {
    width: 100%;
    padding: clamp(0.7rem, 3vw, 0.9rem);
    margin: 0.5rem 0;
    border-radius: 10px;
    border: 1px solid var(--bd);
    background: var(--bg);
    color: var(--text);
    font-size: clamp(0.95rem, 3vw, 1rem);
    outline: none;
}
button {
    background: linear-gradient(90deg, var(--c1), var(--c2));
    color: #fff;
    border: none;
    cursor: pointer;
    font-weight: 500;
}

/* 表格自适应 */
.table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    display: block;
    overflow-x: auto;
}
.table th, .table td {
    padding: clamp(0.7rem, 3vw, 1rem);
    border-bottom: 1px solid var(--bd);
    white-space: nowrap;
}

/* 按钮 */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    color: #fff;
    text-decoration: none;
    margin: 0.2rem;
    display: inline-block;
    font-size: clamp(0.85rem, 3vw, 0.95rem);
}
.btn-blue { background: var(--c2); }
.btn-green { background: #10b981; }
.btn-red { background: #ef4444; }

/* 登录框 */
.login {
    max-width: min(90vw, 420px);
    margin: 5rem auto;
}

/* 页脚 */
.footer {
    text-align: center;
    padding: clamp(1.5rem, 6vw, 2.5rem) 1rem;
    border-top: 1px solid var(--bd);
    color: var(--sub);
    width: 100%;
    font-size: clamp(0.9rem, 3vw, 1rem);
}