/* ===== 小99云盘 全局样式（简洁蓝色系） ===== */
:root {
  --accent: #3B82F6;
  --accent-dark: #1D4ED8;
  --accent-light: #EFF6FF;
  --bg: #F4F3EE;
  --card: #FFFFFF;
  --border: #E4E3DD;
  --text: #1A1B1C;
  --text2: #6B7280;
  --ok: #52C41A;
  --warn: #FAAD14;
  --err: #EA6668;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { background: var(--bg); }
body {
  font-family: 'Roboto', 'PingFang SC', 'Segoe UI', Arial, sans-serif;
  color: var(--text); font-size: 14px; line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* ===== 顶栏 ===== */
.topbar { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.topbar .wrap { display: flex; align-items: center; gap: 18px; height: 56px; }
.logo { font-size: 17px; font-weight: 700; color: var(--text); }
.logo:hover { text-decoration: none; }
.nav { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.nav a { padding: 6px 12px; border-radius: 8px; color: var(--text2); font-size: 14px; }
.nav a:hover { background: var(--accent-light); color: var(--accent-dark); text-decoration: none; }
.nav a.on { background: var(--accent); color: #fff; font-weight: 600; }
.userbox { display: flex; align-items: center; gap: 10px; }
.userbox .nick { font-weight: 600; }
.vip-badge { background: linear-gradient(135deg, #F59E0B, #D97706); color: #fff; font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 999px; }
.btn-link { color: var(--text2); font-size: 13px; }
.btn-link:hover { color: var(--accent); text-decoration: none; }

/* ===== 公告横幅 ===== */
.announce { background: var(--accent-light); border-bottom: 1px solid var(--border); font-size: 13px; padding: 8px 0; color: var(--accent-dark); }
.announce.static { border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; margin-top: 8px; background: #fff; }

/* ===== 面板 ===== */
.panel { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px; margin: 16px 0; }
.panel.narrow { max-width: 560px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.crumbs { font-size: 15px; font-weight: 600; }
.crumbs a { color: var(--text); }
.crumbs a:hover { color: var(--accent); }
.crumb-sep { color: var(--text2); margin: 0 4px; }
.panel-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ===== 按钮 ===== */
.btn { display: inline-block; border: 1px solid var(--border); background: #fff; color: var(--text); padding: 7px 14px; border-radius: 9px; font-size: 14px; cursor: pointer; }
.btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-ghost { background: transparent; }
.btn-block { width: 100%; display: block; }
.btn-lg { padding: 12px 28px; font-size: 15px; }
.btn-sm { padding: 4px 10px; font-size: 13px; }

/* ===== 表单 ===== */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--text2); margin-bottom: 5px; }
input[type="text"], input[type="password"], input[type="file"], select, textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 9px;
  font-size: 14px; font-family: inherit; background: #fff; color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,.12); }
textarea { resize: vertical; }
.row-btns { display: flex; gap: 8px; margin-top: 6px; }
.center-form { text-align: center; margin-top: 14px; }
.center-tip { text-align: center; color: var(--text2); font-size: 12px; margin-top: 10px; }
.inline-form { background: var(--accent-light); border-radius: 10px; padding: 12px; margin-bottom: 12px; }
.inline-form form { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.inline-form input[type="text"] { width: auto; flex: 1 1 200px; }
.inline-form input[type="file"] { flex: 1 1 200px; width: auto; padding: 6px; }
.share-form { max-width: 480px; }

/* ===== 提示 / 消息 ===== */
.alert { padding: 10px 14px; border-radius: 10px; font-size: 14px; margin: 12px 0; background: #F0FDF4; border: 1px solid #BBF7D0; color: #166534; }
.alert-err { background: #FEF2F2; border-color: #FECACA; color: #991B1B; }
.tip { font-size: 12.5px; color: var(--text2); }
.tips { padding-left: 20px; font-size: 13.5px; color: var(--text); }
.tips li { margin: 6px 0; }
.empty { text-align: center; color: var(--text2); padding: 40px 0; font-size: 14px; }

/* ===== 文件表格 ===== */
.filetable { width: 100%; border-collapse: collapse; }
.filetable th { text-align: left; font-size: 12.5px; color: var(--text2); font-weight: 500; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.filetable td { padding: 9px 10px; border-bottom: 1px solid var(--border); font-size: 13.5px; vertical-align: middle; }
.filetable tbody tr:hover { background: #FAFAF8; }
.fname { color: var(--text); font-weight: 500; word-break: break-all; }
.fname:hover { color: var(--accent); }
.dim { color: var(--text2); }
.ops { white-space: nowrap; }
.op { display: inline-block; color: var(--accent); font-size: 13px; margin-right: 8px; }
.op:hover { color: var(--accent-dark); }
.op-danger { color: var(--err); }
.op-danger:hover { color: #B91C1C; }
.op-inline { display: inline-block; }
.op-inline summary { cursor: pointer; list-style: none; display: inline-block; }
.op-inline form { background: var(--accent-light); border-radius: 10px; padding: 10px; margin-top: 8px; max-width: 320px; }
.ficon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 8px; color: #fff;
  font-size: 10px; font-weight: 700; letter-spacing: .3px;
}
.fico-folder { background: none; position: relative; width: 30px; height: 30px; }
.fico-folder::before {
  content: ''; position: absolute; bottom: 3px; left: 2px; right: 2px; top: 8px;
  background: #F6C344; border-radius: 3px;
  box-shadow: 0 1px 2px rgba(0,0,0,.18);
}
.fico-folder::after {
  content: ''; position: absolute; top: 3px; left: 2px; width: 13px; height: 7px;
  background: #F6C344; border-radius: 3px 3px 0 0;
}
.tag { display: inline-block; background: var(--border); color: #4B4F54; font-size: 11px; padding: 1px 7px; border-radius: 999px; margin-left: 4px; }
.tag-ok { background: #DCFCE7; color: #166534; }
.tag-admin { background: var(--accent-light); color: var(--accent-dark); }
.code { background: var(--accent-light); color: var(--accent-dark); font-size: 15px; font-weight: 700; padding: 2px 10px; border-radius: 7px; letter-spacing: 2px; }
.search { display: flex; gap: 6px; }
.search input, .search select { width: auto; }
.search button { border: 1px solid var(--border); background: #fff; border-radius: 9px; padding: 7px 14px; cursor: pointer; color: var(--text); }
.search button:hover { border-color: var(--accent); color: var(--accent); }

/* ===== 空间条 ===== */
.spacebar { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; margin: 12px 0; }
.sb-info { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 8px; flex-wrap: wrap; gap: 6px; }
.sb-track { height: 8px; background: #EEEEEA; border-radius: 999px; overflow: hidden; }
.sb-fill { height: 100%; border-radius: 999px; transition: width .3s; }

/* ===== 预览页 ===== */
.preview-page .panel { max-width: 900px; margin: 16px auto; }
.textview { background: #0F172A; color: #E2E8F0; padding: 16px; border-radius: 10px; font-size: 13px; overflow-x: auto; max-height: 560px; overflow-y: auto; font-family: Consolas, Menlo, monospace; line-height: 1.6; white-space: pre-wrap; word-break: break-all; }
.media { width: 100%; border-radius: 10px; background: #000; }

/* ===== VIP 页 ===== */
.vip-hero { background: linear-gradient(135deg, #F59E0B, #D97706); border-radius: 16px; color: #fff; padding: 26px 22px; margin: 16px 0; }
.vip-title { font-size: 21px; font-weight: 700; }
.vip-sub { font-size: 14px; margin-top: 6px; opacity: .95; }
.vip-cards { display: flex; gap: 16px; flex-wrap: wrap; margin: 16px 0; }
.vip-card { flex: 1 1 240px; min-width: 0; background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 18px; }
.vip-card-on { border: 2px solid #F59E0B; background: #FFFBEB; }
.vip-card-off { opacity: .75; }
.vc-title { font-size: 14px; color: var(--text2); font-weight: 600; }
.vc-big { font-size: 34px; font-weight: 800; color: var(--text); margin: 6px 0 10px; }
.vip-card-on .vc-big { color: #D97706; }
.vip-card ul { padding-left: 18px; font-size: 13.5px; }
.vip-card li { margin: 4px 0; }

/* ===== 登录/注册页 ===== */
.auth-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; background: linear-gradient(135deg, #DBEAFE, #EFF6FF 60%, #F4F3EE); }
.auth-card { background: #fff; border-radius: 18px; box-shadow: 0 8px 30px rgba(0,0,0,.08); padding: 30px 28px; width: 100%; max-width: 400px; }
.auth-logo { font-size: 24px; font-weight: 800; color: var(--accent-dark); text-align: center; }
.auth-sub { text-align: center; color: var(--text2); font-size: 13px; margin: 4px 0 18px; }
.auth-ann { background: var(--accent-light); border-radius: 10px; padding: 10px 12px; font-size: 12.5px; color: var(--accent-dark); margin-bottom: 14px; }
.auth-foot { text-align: center; margin-top: 16px; font-size: 13px; color: var(--text2); }

/* ===== 管理后台 ===== */
.admin-topbar { background: #0F172A; border-bottom: none; }
.admin-topbar .logo, .admin-topbar .nick { color: #fff; }
.admin-topbar .btn-link { color: #94A3B8; }
.admin-layout { display: flex; gap: 18px; align-items: flex-start; margin: 20px auto; }
.admin-side { width: 160px; flex-shrink: 0; background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 10px; position: sticky; top: 72px; }
.admin-side a { display: block; padding: 9px 12px; border-radius: 9px; color: var(--text2); font-size: 14px; }
.admin-side a:hover { background: var(--accent-light); color: var(--accent-dark); text-decoration: none; }
.admin-main { flex: 1; min-width: 0; }
.admin-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 16px 0 4px; flex-wrap: wrap; }
.admin-head h2 { font-size: 19px; }
.stat-cards { display: flex; gap: 12px; flex-wrap: wrap; margin: 14px 0; }
.stat { flex: 1 1 150px; min-width: 0; background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; }
.st-num { font-size: 24px; font-weight: 800; color: var(--accent-dark); }
.st-label { font-size: 12.5px; color: var(--text2); margin-top: 2px; }
.two-col { display: flex; gap: 16px; flex-wrap: wrap; }
.two-col .panel { flex: 1 1 340px; min-width: 0; }
.ann-preview { background: var(--accent-light); border-radius: 10px; padding: 12px; margin-bottom: 12px; font-size: 13.5px; color: var(--accent-dark); }
.preview-label { font-size: 12.5px; color: var(--text2); margin-top: 18px; }
.transfer-bar { display: flex; gap: 10px; align-items: center; margin-top: 12px; flex-wrap: wrap; }
.transfer-bar select { width: auto; flex: 1 1 200px; }

/* ===== 移动端 ===== */
@media (max-width: 720px) {
  .topbar .wrap { flex-wrap: wrap; height: auto; padding: 8px 16px; gap: 8px; }
  .nav { order: 3; width: 100%; }
  .admin-layout { flex-direction: column; }
  .admin-side { width: 100%; position: static; display: flex; flex-wrap: wrap; gap: 4px; }
  .admin-side a { padding: 6px 10px; font-size: 13px; }
  .filetable { display: block; overflow-x: auto; }
  .auth-card { padding: 24px 20px; }
}