/* ==========================================================================
   box.xhja.cn 工具箱 · 全站样式
   视觉规范对齐 xhja.cn 主页：#4290f5 主色 / 浅蓝渐变 / 毛玻璃卡片 / 28px 圆角
   ========================================================================== */

:root {
  --primary: #4290f5;
  --primary-dark: #2f6fd0;
  --primary-light: #e8f4fd;
  --primary-grad: linear-gradient(135deg, #4290f5, #6aaaff);
  --page-gradient: linear-gradient(135deg, #e8f4fd 0%, #b8dff5 55%, #7ec8e3 100%);
  --ink: #1a202c;
  --ink-2: #2d3748;
  --ink-3: #718096;
  --card-bg: rgba(255, 255, 255, .9);
  --card-border: rgba(255, 255, 255, .6);
  --card-radius: 28px;
  --card-radius-sm: 18px;
  --shadow: 0 8px 30px rgba(31, 64, 104, .08);
  --shadow-hover: 0 14px 40px rgba(31, 64, 104, .14);
  --field-bg: rgba(248, 251, 255, .9);
  --field-border: rgba(66, 144, 245, .22);
  --danger: #e5534b;
  --ok: #38a169;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", sans-serif;
  color: var(--ink-2);
  background-color: var(--primary-light);
  background-image: var(--page-gradient);
  background-attachment: fixed;
  background-repeat: no-repeat;
  background-size: cover;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ============================ 顶栏 ============================ */
.site-banner {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 28px;
  background: rgba(255, 255, 255, .82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(66, 144, 245, .18);
  box-shadow: 0 2px 12px rgba(31, 64, 104, .06);
}
.banner-left { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-home { display: flex; align-items: center; gap: 9px; text-decoration: none; color: inherit; flex-shrink: 0; }
.brand-home:hover { text-decoration: none; }
.banner-mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: var(--primary-grad);
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(66, 144, 245, .25);
}
.banner-mark svg { width: 18px; height: 18px; }
.banner-brand { font-size: 18px; font-weight: 700; color: var(--primary); letter-spacing: .5px; white-space: nowrap; }
.banner-sep { color: #9fb3c8; font-weight: 600; }
.banner-cur { font-size: 15px; font-weight: 600; color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.banner-right { display: flex; align-items: center; gap: 12px; }
.banner-contact {
  font-size: 12.5px; color: #5a6b7b;
  background: rgba(66, 144, 245, .1); border: 1px solid rgba(66, 144, 245, .22);
  padding: 6px 12px; border-radius: 11px; white-space: nowrap;
}
.banner-contact a { color: var(--primary); font-weight: 700; }
@media (max-width: 760px) {
  .site-banner { padding: 10px 16px; }
  .banner-cur { display: none; }
  .banner-contact .ct-txt { display: none; }
}

/* ============================ 主体 ============================ */
main { max-width: 1080px; margin: 0 auto; padding: 40px 20px 64px; }
main.narrow { max-width: 860px; }

.hero { margin-bottom: 30px; }
.hero h1 { font-size: 30px; font-weight: 600; color: var(--ink); margin: 0 0 10px; letter-spacing: .5px; }
.hero p { font-size: 15px; color: var(--ink-3); margin: 0; line-height: 1.7; }

/* 返回链接 */
.back-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; color: var(--primary); margin-bottom: 16px;
  background: rgba(255, 255, 255, .7); border: 1px solid var(--field-border);
  padding: 6px 14px; border-radius: 20px;
  backdrop-filter: blur(8px);
}
.back-link:hover { text-decoration: none; background: rgba(255, 255, 255, .95); }

/* ============================ 卡片 ============================ */
.card {
  background: var(--card-bg);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: 26px;
  box-shadow: var(--shadow);
}
.card + .card { margin-top: 20px; }
.card-title {
  font-size: 16px; font-weight: 600; color: var(--ink);
  margin: 0 0 16px; display: flex; align-items: center; gap: 8px;
}
.card-title .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary-grad); }

/* 首页工具网格 */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.tool-card {
  display: flex; flex-direction: column;
  text-decoration: none;
  background: var(--card-bg);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease;
  color: inherit;
}
.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  text-decoration: none;
}
.tool-card .ic {
  width: 46px; height: 46px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-grad);
  color: #fff; font-size: 20px; margin-bottom: 14px;
  box-shadow: 0 4px 14px rgba(66, 144, 245, .28);
}
.tool-card h3 { font-size: 16px; font-weight: 600; color: var(--ink); margin: 0 0 6px; }
.tool-card p { font-size: 13px; color: var(--ink-3); margin: 0; line-height: 1.6; }
.tool-card .tag {
  margin-top: 12px; align-self: flex-start;
  font-size: 11px; color: var(--primary);
  background: rgba(66, 144, 245, .1); border: 1px solid rgba(66, 144, 245, .2);
  padding: 3px 10px; border-radius: 20px;
}
.tool-card .tag.local { color: #2d8a4e; background: rgba(56, 161, 105, .1); border-color: rgba(56, 161, 105, .2); }
.tool-card .tag.online { color: #b7791f; background: rgba(214, 158, 46, .12); border-color: rgba(214, 158, 46, .25); }

/* 分类标题 */
.cat-title {
  font-size: 15px; font-weight: 600; color: var(--ink-2);
  margin: 34px 0 16px; display: flex; align-items: center; gap: 8px;
}
.cat-title::before { content: ""; width: 4px; height: 16px; border-radius: 2px; background: var(--primary-grad); }
.cat-title:first-child { margin-top: 8px; }

/* ============================ 搜索 ============================ */
.search-bar {
  display: flex; gap: 10px; margin-bottom: 8px; flex-wrap: wrap;
}
.search-bar input {
  flex: 1; min-width: 200px;
  padding: 12px 18px; font-size: 14px;
  border: 1px solid var(--field-border); border-radius: 16px;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(8px);
  outline: none; color: var(--ink-2);
  font-family: inherit;
}
.search-bar input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(66, 144, 245, .12); }

/* ============================ 表单控件 ============================ */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--ink-2); margin-bottom: 7px; }
.field .hint { font-size: 12px; color: var(--ink-3); margin-top: 6px; line-height: 1.6; }

input[type="text"], input[type="number"], input[type="password"], select, textarea {
  width: 100%; padding: 11px 14px; font-size: 14px;
  border: 1px solid var(--field-border); border-radius: 12px;
  background: var(--field-bg); color: var(--ink-2);
  outline: none; font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
}
input[type="text"]:focus, input[type="number"]:focus, select:focus, textarea:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(66, 144, 245, .12);
}
textarea { resize: vertical; min-height: 120px; line-height: 1.7; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
input[type="range"] { width: 100%; accent-color: var(--primary); }
input[type="color"] { width: 56px; height: 38px; padding: 2px; border: 1px solid var(--field-border); border-radius: 10px; background: var(--field-bg); cursor: pointer; }

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.row > * { flex: 1; min-width: 120px; }
.row.end { justify-content: flex-end; }
.check { display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--ink-2); cursor: pointer; }
.check input { width: auto; accent-color: var(--primary); }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 11px 22px; font-size: 14px; font-weight: 600;
  border: none; border-radius: 14px; cursor: pointer;
  background: var(--primary-grad); color: #fff;
  box-shadow: 0 4px 14px rgba(66, 144, 245, .28);
  transition: transform .15s, box-shadow .15s, opacity .15s;
  font-family: inherit;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(66, 144, 245, .34); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-ghost {
  background: rgba(255, 255, 255, .8); color: var(--primary);
  border: 1px solid var(--field-border); box-shadow: none;
}
.btn-ghost:hover { background: #fff; box-shadow: 0 4px 14px rgba(31, 64, 104, .1); }
.btn-sm { padding: 8px 16px; font-size: 13px; border-radius: 11px; }

/* 文件拖放区 */
.drop {
  border: 2px dashed rgba(66, 144, 245, .35);
  border-radius: 20px; padding: 34px 20px; text-align: center;
  background: rgba(232, 244, 253, .5);
  cursor: pointer; transition: all .18s;
}
.drop:hover, .drop.over { border-color: var(--primary); background: rgba(66, 144, 245, .08); }
.drop .big { font-size: 30px; margin-bottom: 8px; }
.drop .t1 { font-size: 14px; font-weight: 600; color: var(--ink-2); }
.drop .t2 { font-size: 12px; color: var(--ink-3); margin-top: 5px; }

/* 文件列表 */
.filelist { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; }
.filelist .item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; font-size: 13px;
  background: rgba(232, 244, 253, .6);
  border: 1px solid rgba(66, 144, 245, .15);
  border-radius: 12px;
}
.filelist .item .nm { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.filelist .item .sz { color: var(--ink-3); font-size: 12px; }
.filelist .item .del { cursor: pointer; color: var(--danger); font-size: 16px; line-height: 1; padding: 0 4px; }

/* 进度条 */
.progress { height: 8px; background: rgba(66, 144, 245, .15); border-radius: 10px; overflow: hidden; margin-top: 14px; display: none; }
.progress.on { display: block; }
.progress .bar { height: 100%; width: 0; background: var(--primary-grad); border-radius: 10px; transition: width .2s; }

/* 状态提示 */
.msg { margin-top: 14px; font-size: 13px; line-height: 1.7; display: none; padding: 12px 16px; border-radius: 12px; }
.msg.on { display: block; }
.msg.info { background: rgba(66, 144, 245, .08); color: var(--primary-dark); border: 1px solid rgba(66, 144, 245, .18); }
.msg.ok { background: rgba(56, 161, 105, .1); color: #276749; border: 1px solid rgba(56, 161, 105, .2); }
.msg.err { background: rgba(229, 83, 75, .08); color: #c53030; border: 1px solid rgba(229, 83, 75, .2); }

/* 预览 */
.preview { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 12px; }
.preview img, .preview video {
  max-width: 100%; border-radius: 14px; border: 1px solid var(--field-border); background: #fff;
}
.preview .thumb { position: relative; }
.preview .thumb .cap {
  position: absolute; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, .55); color: #fff; font-size: 11px;
  padding: 3px 8px; border-radius: 0 0 13px 13px; text-align: center;
}

/* 输出框 */
.out {
  background: rgba(248, 251, 255, .9); border: 1px solid var(--field-border);
  border-radius: 14px; padding: 14px; font-size: 13px; line-height: 1.7;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap; word-break: break-all; max-height: 420px; overflow: auto;
  color: var(--ink-2);
}

/* 统计 */
.stats { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 14px; }
.stats .s { background: rgba(232, 244, 253, .7); border: 1px solid rgba(66, 144, 245, .15); border-radius: 14px; padding: 12px 18px; min-width: 96px; }
.stats .s b { display: block; font-size: 20px; color: var(--primary); font-weight: 700; }
.stats .s span { font-size: 12px; color: var(--ink-3); }

/* 说明块 */
.note {
  margin-top: 18px; font-size: 12.5px; color: var(--ink-3); line-height: 1.8;
  background: rgba(255, 255, 255, .55); border-left: 3px solid var(--primary);
  padding: 12px 16px; border-radius: 0 12px 12px 0;
}
.note b { color: var(--ink-2); }

/* ============================ 页脚 ============================ */
.site-footer {
  text-align: center; padding: 30px 16px 46px;
  font-size: 13px; line-height: 1.8; color: #5a6b7b;
}
.site-footer .ft-title { font-weight: 700; font-size: 14px; color: var(--primary); margin-bottom: 4px; }
.site-footer .ft-sub { font-size: 12px; color: #6b7b8b; max-width: 760px; margin: 0 auto; }
.site-footer a { font-weight: 700; }

/* 空状态 */
.empty { text-align: center; padding: 50px 20px; color: var(--ink-3); font-size: 14px; }
.empty .big { font-size: 40px; margin-bottom: 12px; }

@media (max-width: 640px) {
  main { padding: 28px 14px 48px; }
  .grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
  .card { padding: 20px; border-radius: 22px; }
  .row > * { min-width: 100%; }
}

/* ===== 全站统一：站点互链导航 + 反馈邮箱 ===== */
.xhja-sitenav{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:2px 16px;max-width:960px;margin:0 auto 16px;padding:8px 14px;font-size:13px;line-height:1.7;text-align:center;background:rgba(255,255,255,.72);border:1px solid rgba(66,144,245,.16);border-radius:14px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.xhja-sitenav a{color:#5a6b7b;text-decoration:none;white-space:nowrap;transition:color .15s}
.xhja-sitenav a:hover{color:#4290f5}
.xhja-sitenav a.cur{color:#4290f5;font-weight:600}
.xhja-feedback{margin-top:10px;font-size:13px;color:#6b7b8b}
.xhja-feedback a{color:#4290f5;text-decoration:none;font-weight:600}
.xhja-feedback a:hover{text-decoration:underline}