/* ===== 前台样式（响应式） ===== */
:root {
    --primary: #3b6ef5;
    --primary-dark: #2b55c9;
    --primary-light: #e8eefd;
    --bg: #f5f7fb;
    --card: #ffffff;
    --text: #1f2937;
    --text-light: #6b7280;
    --border: #e5e7eb;
    --danger: #ef4444;
    --warning: #f59e0b;
    --success: #10b981;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 4px 16px rgba(0, 0, 0, .05);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { opacity: .85; }

/* 顶部导航 */
.site-header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 4px rgba(0, 0, 0, .04);
}
.header-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 16px;
    height: 60px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 700; color: var(--text); min-width: 0; }
.logo img { height: 32px; width: 32px; object-fit: contain; border-radius: 8px; }
.logo span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.header-search { flex: 1; max-width: 360px; margin-left: auto; display: flex; }
.header-search form { display: flex; width: 100%; }
.header-search input {
    flex: 1; height: 36px; padding: 0 14px; border: 1px solid var(--border);
    border-radius: 18px 0 0 18px; font-size: 14px; outline: none; background: var(--bg);
}
.header-search input:focus { border-color: var(--primary); background: #fff; }
.header-search button {
    height: 36px; padding: 0 16px; border: none; background: var(--primary); color: #fff;
    border-radius: 0 18px 18px 0; cursor: pointer; font-size: 14px;
}
.header-actions { display: flex; align-items: center; gap: 8px; }
.btn-admin {
    height: 32px; padding: 0 14px; border: 1px solid var(--border); border-radius: 16px;
    background: var(--card); color: var(--text-light); font-size: 13px; cursor: pointer;
    display: inline-flex; align-items: center; gap: 4px; white-space: nowrap;
}
.btn-admin:hover { border-color: var(--primary); color: var(--primary); }

/* 主体 */
.site-main { flex: 1; width: 100%; max-width: 1080px; margin: 0 auto; padding: 24px 16px 48px; }

/* 分类筛选 */
.cat-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.cat-bar a {
    padding: 6px 16px; border-radius: 20px; background: var(--card); border: 1px solid var(--border);
    color: var(--text-light); font-size: 13px; transition: all .2s;
}
.cat-bar a.active, .cat-bar a:hover { background: var(--primary); border-color: var(--primary); color: #fff; }

/* 统计 */
.list-stats { color: var(--text-light); font-size: 13px; margin-bottom: 14px; }

/* 文件网格 */
.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
}
.file-card {
    background: var(--card); border-radius: var(--radius); border: 1px solid var(--border);
    padding: 16px; display: flex; flex-direction: column; gap: 10px;
    transition: transform .15s, box-shadow .15s; position: relative;
}
.file-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.file-card-top { display: flex; align-items: flex-start; gap: 12px; }
.file-icon {
    width: 46px; height: 46px; border-radius: 10px; background: var(--primary-light);
    display: flex; align-items: center; justify-content: center; font-size: 24px; flex-shrink: 0;
}
.file-name { font-size: 15px; font-weight: 600; word-break: break-all; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.file-meta { display: flex; align-items: center; gap: 10px; color: var(--text-light); font-size: 12px; flex-wrap: wrap; }
.file-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: #cbd5e1; }
.file-card-bottom { display: flex; align-items: center; justify-content: space-between; margin-top: auto; }
.badge {
    display: inline-flex; align-items: center; gap: 3px; padding: 2px 8px; border-radius: 10px;
    font-size: 11px; font-weight: 600;
}
.badge-lock { background: #fef3c7; color: #b45309; }
.badge-hot { background: #fee2e2; color: #dc2626; }
.badge-new { background: #d1fae5; color: #047857; }
.dl-btn {
    display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border-radius: 8px;
    background: var(--primary); color: #fff !important; font-size: 13px; font-weight: 500;
    transition: background .15s; border: none; cursor: pointer;
}
.dl-btn:hover { background: var(--primary-dark); opacity: 1; }
.dl-btn.ghost { background: var(--primary-light); color: var(--primary) !important; }

/* 空状态 */
.empty { text-align: center; padding: 80px 20px; color: var(--text-light); }
.empty .empty-icon { font-size: 56px; margin-bottom: 12px; }

/* 分页 */
.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 28px; flex-wrap: wrap; }
.pagination a, .pagination span {
    min-width: 34px; height: 34px; padding: 0 10px; display: inline-flex; align-items: center; justify-content: center;
    border-radius: 8px; background: var(--card); border: 1px solid var(--border); font-size: 13px; color: var(--text);
}
.pagination .current { background: var(--primary); border-color: var(--primary); color: #fff; }
.pagination .disabled { opacity: .5; pointer-events: none; }

/* 详情页 */
.detail-wrap { max-width: 760px; margin: 0 auto; }
.detail-card {
    background: var(--card); border-radius: 16px; border: 1px solid var(--border);
    padding: 28px; box-shadow: var(--shadow);
}
.detail-head { display: flex; align-items: center; gap: 18px; margin-bottom: 22px; }
.detail-icon {
    width: 64px; height: 64px; border-radius: 14px; background: var(--primary-light);
    display: flex; align-items: center; justify-content: center; font-size: 34px; flex-shrink: 0;
}
.detail-title { font-size: 20px; font-weight: 700; word-break: break-all; }
.detail-sub { color: var(--text-light); font-size: 13px; margin-top: 4px; }
.info-table { width: 100%; border-collapse: collapse; margin: 18px 0; }
.info-table td { padding: 10px 4px; border-bottom: 1px dashed var(--border); font-size: 14px; vertical-align: top; }
.info-table td:first-child { width: 120px; color: var(--text-light); }
.detail-desc {
    background: var(--bg); border-radius: 10px; padding: 14px 16px; font-size: 14px;
    color: var(--text); margin: 16px 0; word-break: break-word; white-space: pre-wrap;
}
.detail-actions { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }
.dl-btn-lg { padding: 12px 32px; font-size: 15px; border-radius: 10px; }
.btn-outline {
    padding: 12px 24px; border-radius: 10px; border: 1px solid var(--border); background: var(--card);
    color: var(--text); font-size: 14px; cursor: pointer; display: inline-flex; align-items: center; gap: 6px;
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.share-box { margin-top: 20px; background: var(--bg); border-radius: 10px; padding: 14px; }
.share-box .share-label { font-size: 13px; color: var(--text-light); margin-bottom: 8px; }
.share-row { display: flex; gap: 8px; }
.share-row input {
    flex: 1; height: 38px; padding: 0 12px; border: 1px solid var(--border); border-radius: 8px;
    font-size: 13px; color: var(--text); background: #fff; outline: none; min-width: 0;
}
.copy-btn {
    height: 38px; padding: 0 18px; border: none; border-radius: 8px; background: var(--primary);
    color: #fff; cursor: pointer; font-size: 13px; white-space: nowrap;
}

/* 验证/密码页 */
.verify-wrap { max-width: 440px; margin: 40px auto; }
.verify-card {
    background: var(--card); border-radius: 16px; border: 1px solid var(--border);
    padding: 32px; box-shadow: var(--shadow); text-align: center;
}
.verify-icon { font-size: 52px; margin-bottom: 10px; }
.verify-title { font-size: 19px; font-weight: 700; margin-bottom: 4px; }
.verify-file { color: var(--text-light); font-size: 13px; margin-bottom: 22px; word-break: break-all; }
.verify-form { text-align: left; }
.verify-form label { font-size: 13px; color: var(--text-light); display: block; margin-bottom: 6px; }
.verify-form .input-row { display: flex; gap: 8px; margin-bottom: 14px; }
.verify-form input[type="text"], .verify-form input[type="password"] {
    flex: 1; height: 42px; padding: 0 14px; border: 1px solid var(--border); border-radius: 8px;
    font-size: 14px; outline: none; background: #fff; min-width: 0;
}
.verify-form input:focus { border-color: var(--primary); }
.captcha-img {
    height: 42px; border-radius: 8px; cursor: pointer; border: 1px solid var(--border);
    flex-shrink: 0; width: 130px; object-fit: cover;
}
.verify-error {
    background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; border-radius: 8px;
    padding: 10px 14px; font-size: 13px; margin-bottom: 14px; text-align: left;
}
.verify-submit {
    width: 100%; height: 44px; border: none; border-radius: 8px; background: var(--primary);
    color: #fff; font-size: 15px; font-weight: 600; cursor: pointer; margin-top: 4px;
}
.verify-submit:hover { background: var(--primary-dark); }
.verify-back { display: block; text-align: center; margin-top: 16px; font-size: 13px; color: var(--text-light); }

/* 拦截页 */
.blocked-wrap { text-align: center; padding: 100px 20px; }
.blocked-icon { font-size: 72px; margin-bottom: 16px; }

/* 页脚 */
.site-footer {
    border-top: 1px solid var(--border); background: var(--card);
    padding: 20px 16px; text-align: center; color: var(--text-light); font-size: 13px;
}

/* 提示条 */
.toast {
    position: fixed; top: 20px; left: 50%; transform: translateX(-50%) translateY(-80px);
    background: #111827; color: #fff; padding: 10px 22px; border-radius: 10px; font-size: 14px;
    z-index: 999; opacity: 0; transition: all .3s; pointer-events: none; max-width: 90vw; text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* 响应式 */
@media (max-width: 640px) {
    .header-inner { height: 56px; gap: 10px; }
    .header-search { max-width: none; order: 3; flex-basis: 100%; margin: 0 0 8px; }
    .site-header { padding-bottom: 8px; }
    .header-inner { flex-wrap: wrap; height: auto; padding-top: 8px; }
    .header-actions { margin-left: auto; }
    .file-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
    .file-card { padding: 12px; }
    .file-icon { width: 40px; height: 40px; font-size: 20px; }
    .file-name { font-size: 14px; }
    .detail-card { padding: 18px; }
    .detail-head { gap: 12px; }
    .detail-icon { width: 52px; height: 52px; font-size: 26px; }
    .detail-title { font-size: 17px; }
    .detail-actions .dl-btn-lg { width: 100%; justify-content: center; }
    .btn-outline { flex: 1; justify-content: center; }
    .verify-wrap { margin: 20px auto; }
    .verify-card { padding: 24px 18px; }
}