/* ============================================
   ToolBox 128w.cn — 暗色主题精致版
   ============================================ */

:root {
  /* 基础色板 */
  --bg-primary:     #0b0b12;
  --bg-secondary:   #12121c;
  --bg-card:        #181825;
  --bg-card-hover:  #20203a;
  --border-color:   #282842;
  --border-glow:    rgba(99, 102, 241, 0.18);
  --text-primary:   #ededf5;
  --text-secondary: #8f8fa8;
  --text-muted:     #5e5e78;

  /* 强调色 */
  --accent-1: #6366f1;
  --accent-2: #8b5cf6;
  --accent-3: #06b6d4;
  --accent-green:  #10b981;
  --accent-red:    #ef4444;
  --accent-orange: #f59e0b;
  --accent-pink:   #ec4899;

  /* 透明度分层 (Zinc 风格) */
  --alpha-4:  rgba(255,255,255,.04);
  --alpha-6:  rgba(255,255,255,.06);
  --alpha-8:  rgba(255,255,255,.08);
  --alpha-10: rgba(255,255,255,.10);
  --alpha-14: rgba(255,255,255,.14);
  --alpha-20: rgba(255,255,255,.20);

  /* 阴影 */
  --shadow-sm: 0 2px 8px  rgba(0,0,0,.32);
  --shadow-md: 0 4px 24px rgba(0,0,0,.40);
  --shadow-lg: 0 8px 48px rgba(0,0,0,.50);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* 动画 */
  --transition:     .2s ease;
  --transition-slow: .45s cubic-bezier(.16,1,.3,1);

  /* 字体 */
  --font-mono: 'SF Mono','Fira Code','Cascadia Code','JetBrains Mono',monospace;
}

/* ---------- 浅色模式 ---------- */
[data-theme="light"] {
  --bg-primary:     #f3f3f6;
  --bg-secondary:   #eaeaee;
  --bg-card:        #ffffff;
  --bg-card-hover:  #f0f0f4;
  --border-color:   #d8d8e0;
  --border-glow:    rgba(99,102,241,.22);
  --text-primary:   #1a1a24;
  --text-secondary: #6a6a78;
  --text-muted:     #9696a0;
  --alpha-4:  rgba(0,0,0,.04);
  --alpha-6:  rgba(0,0,0,.06);
  --alpha-8:  rgba(0,0,0,.08);
  --alpha-10: rgba(0,0,0,.10);
  --alpha-14: rgba(0,0,0,.14);
  --alpha-20: rgba(0,0,0,.20);
  --shadow-sm: 0 2px 8px  rgba(0,0,0,.06);
  --shadow-md: 0 4px 24px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 48px rgba(0,0,0,.10);
}

/* ============================================
   全局重置
   ============================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
               'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100dvh;
  line-height: 1.6;
  transition: background var(--transition-slow), color var(--transition-slow);
}

/* ---------- 背景环境光 ---------- */
body::before {
  content: '';
  position: fixed;
  inset: -50vh -50vw;
  width: 200vw;
  height: 200vh;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%,   rgba(99,102,241,.07) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 30% 100%,  rgba(139,92,246,.04) 0%, transparent 60%),
    radial-gradient(ellipse 40% 30% at 80% 60%,   rgba(6,182,212,.03) 0%, transparent 50%);
}

[data-theme="light"] body::before {
  background:
    radial-gradient(ellipse 60% 40% at 50% 0%,   rgba(99,102,241,.04) 0%, transparent 70%),
    radial-gradient(ellipse 40% 30% at 30% 100%,  rgba(139,92,246,.02) 0%, transparent 60%);
}

/* ============================================
   滚动条
   ============================================ */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ============================================
   顶部导航
   ============================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg-primary) 82%, transparent);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border-bottom: 1px solid var(--border-color);
  padding: 0 24px;
}

.navbar-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 700;
}

.navbar-brand .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: #fff;
  box-shadow: 0 2px 12px rgba(99,102,241,.3);
}

.navbar-brand span {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-back {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.navbar-back:hover {
  background: var(--alpha-8);
  color: var(--text-primary);
}

/* 主题切换按钮：固定右上角 */
.theme-toggle {
  position: fixed;
  top: 14px;
  right: 24px;
  z-index: 1000;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: color-mix(in srgb, var(--bg-card) 78%, transparent);
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  -webkit-tap-highlight-color: transparent;
  box-shadow: var(--shadow-sm), 0 0 0 1px var(--alpha-4) inset;
  backdrop-filter: blur(18px) saturate(1.25);
  -webkit-backdrop-filter: blur(18px) saturate(1.25);
}
.theme-toggle:hover {
  background: var(--alpha-10);
  color: var(--text-primary);
  border-color: var(--accent-1);
  box-shadow: var(--shadow-md), 0 0 22px rgba(99,102,241,.18);
}
.theme-toggle:active {
  transform: scale(.92);
}

@media (max-width: 640px) {
  .theme-toggle {
    top: 12px;
    right: 14px;
    width: 36px;
    height: 36px;
  }
}

/* ============================================
   页面标题区
   ============================================ */
.page-header {
  text-align: center;
  padding: 56px 24px 32px;
  position: relative;
}

.page-header h1 {
  font-size: 34px;
  font-weight: 750;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto;
}

/* ============================================
   容器
   ============================================ */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   首页工具网格
   ============================================ */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 16px;
  padding: 16px 0 64px;
}

/* 卡片入场动画 */
.tool-card {
  text-decoration: none;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 18px 22px;
  text-align: center;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;

  /* 入场动画 via CSS */
  animation: cardFadeIn .5s ease both;
  animation-delay: calc(var(--i, 0) * 40ms);

  transition:
    background var(--transition),
    border-color var(--transition),
    transform var(--transition-slow),
    box-shadow var(--transition-slow);
}

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(16px) scale(.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* 卡片顶部辉光线 */
.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--card-accent, var(--accent-1)), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

/* 卡片背景辉光遮罩 */
.tool-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    circle at 50% 0%,
    color-mix(in srgb, var(--card-accent, var(--accent-1)) 8%, transparent),
    transparent 60%
  );
  opacity: 0;
  transition: opacity var(--transition-slow);
  pointer-events: none;
}

/* 卡片悬浮 */
@media (hover: hover) {
  .tool-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--card-accent, var(--accent-1));
    transform: translateY(-6px) scale(1.01);
    box-shadow:
      0 12px 40px rgba(0,0,0,.5),
      0 0 0 1px color-mix(in srgb, var(--card-accent, var(--accent-1)) 15%, transparent);
  }
  .tool-card:hover::before { opacity: 1; }
  .tool-card:hover::after  { opacity: 1; }
}

.tool-card:active {
  transform: translateY(-2px) scale(.98);
}

.tool-card .icon {
  font-size: 32px;
  display: block;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.tool-card .name {
  font-size: 14px;
  font-weight: 600;
  display: block;
  position: relative;
  z-index: 1;
}

.tool-card .desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  display: block;
  position: relative;
  z-index: 1;
}

/* ============================================
   工具内容区
   ============================================ */
.tool-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 24px 80px;
  animation: cardFadeIn .45s ease both;
}

.tool-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 24px;
  transition: background var(--transition), border-color var(--transition);
}

.tool-box h2 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tool-box h2 .badge {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 20px;
  background: var(--alpha-10);
  color: var(--accent-1);
}

/* ============================================
   表单元素
   ============================================ */
textarea, input[type="text"], input[type="number"],
input[type="url"], input[type="search"], select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-mono);
  transition: var(--transition);
  outline: none;
}

textarea:focus, input:focus, select:focus {
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px var(--border-glow);
}

textarea {
  min-height: 160px;
  resize: vertical;
  line-height: 1.5;
}
textarea.small { min-height: 100px; }

select {
  cursor: pointer;
  font-family: inherit;
}

/* ============================================
   按钮
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  color: #fff;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(.96); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  box-shadow: 0 2px 12px rgba(99,102,241,.25);
}
.btn-primary:hover {
  box-shadow: 0 4px 20px rgba(99,102,241,.35);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0) scale(.96); }

.btn-secondary {
  background: var(--alpha-8);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}
.btn-secondary:hover { background: var(--alpha-14); }

.btn-success {
  background: linear-gradient(135deg, var(--accent-green), #059669);
  box-shadow: 0 2px 12px rgba(16,185,129,.25);
}
.btn-success:hover {
  box-shadow: 0 4px 20px rgba(16,185,129,.35);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, var(--accent-red), #dc2626);
  box-shadow: 0 2px 12px rgba(239,68,68,.25);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 16px 0;
}

/* ============================================
   输出区域
   ============================================ */
.output-area {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  min-height: 48px;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  word-break: break-all;
  white-space: pre-wrap;
  position: relative;
}

.output-area .placeholder { color: var(--text-muted); font-family: inherit; }

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 10px;
  font-size: 11px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  opacity: 0;
}
.output-area:hover .copy-btn { opacity: 1; }
.copy-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}
.copy-btn.copied {
  background: var(--accent-green);
  color: #fff;
  border-color: var(--accent-green);
}

/* ============================================
   选项行 & 标签组
   ============================================ */
.options-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin: 12px 0;
}

.option-group {
  display: flex;
  align-items: center;
  gap: 8px;
}
.option-group label {
  font-size: 13px;
  color: var(--text-secondary);
}
.option-group input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent-1);
}
.option-group input[type="number"] {
  width: 80px;
  padding: 6px 10px;
}

/* ============================================
   颜色工具
   ============================================ */
.color-preview {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
}
.color-swatch {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-color);
}

/* ============================================
   IP 信息网格
   ============================================ */
.ip-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.ip-info-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  transition: border-color var(--transition), background var(--transition);
}
.ip-info-item:hover {
  border-color: var(--alpha-20);
  background: var(--alpha-4);
}

.ip-info-item .label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .5px;
}
.ip-info-item .value {
  font-size: 14px;
  font-weight: 500;
  margin-top: 2px;
}

/* ============================================
   HTTP 状态码
   ============================================ */
.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 8px;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.status-item:hover {
  border-color: var(--text-muted);
  background: var(--alpha-4);
}
.status-item:active { transform: scale(.98); }

.status-code {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 16px;
  min-width: 48px;
}
.status-desc {
  font-size: 13px;
  color: var(--text-secondary);
}
.status-tag {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
  margin-left: auto;
}
.status-tag.info        { background: color-mix(in srgb, var(--accent-3) 15%, transparent); color: var(--accent-3); }
.status-tag.success     { background: color-mix(in srgb, var(--accent-green) 15%, transparent); color: var(--accent-green); }
.status-tag.redirect    { background: color-mix(in srgb, var(--accent-orange) 15%, transparent); color: var(--accent-orange); }
.status-tag.client-error,
.status-tag.server-error { background: color-mix(in srgb, var(--accent-red) 15%, transparent); color: var(--accent-red); }

/* ============================================
   Markdown 预览
   ============================================ */
.markdown-input-area {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 12px;
}
.markdown-input-area textarea { min-height: 400px; }

.markdown-preview {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  min-height: 400px;
  overflow-y: auto;
}
.markdown-preview h1,
.markdown-preview h2,
.markdown-preview h3,
.markdown-preview h4,
.markdown-preview h5,
.markdown-preview h6 {
  margin: 16px 0 8px;
  color: var(--text-primary);
}
.markdown-preview h1 { font-size: 24px; border-bottom: 1px solid var(--border-color); padding-bottom: 8px; }
.markdown-preview h2 { font-size: 20px; }
.markdown-preview h3 { font-size: 16px; }
.markdown-preview p { margin: 8px 0; }
.markdown-preview ul, .markdown-preview ol { padding-left: 24px; margin: 8px 0; }
.markdown-preview li { margin: 4px 0; }
.markdown-preview a { color: var(--accent-1); }
.markdown-preview blockquote {
  border-left: 3px solid var(--accent-1);
  padding-left: 12px;
  margin: 8px 0;
  color: var(--text-secondary);
}
.markdown-preview code {
  background: color-mix(in srgb, var(--accent-1) 10%, transparent);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
}
.markdown-preview pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  overflow-x: auto;
  margin: 12px 0;
}
.markdown-preview pre code {
  background: none;
  padding: 0;
}
.markdown-preview table {
  border-collapse: collapse;
  width: 100%;
  margin: 12px 0;
}
.markdown-preview th, .markdown-preview td {
  border: 1px solid var(--border-color);
  padding: 8px 12px;
  text-align: left;
}
.markdown-preview th { background: var(--bg-card); font-weight: 600; }
.markdown-preview img { max-width: 100%; border-radius: var(--radius-sm); }
.markdown-preview hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 16px 0;
}

/* ============================================
   文本对比
   ============================================ */
.diff-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.diff-container textarea { min-height: 240px; }

.diff-output {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  max-height: 400px;
  overflow-y: auto;
  white-space: pre-wrap;
}
.diff-removed {
  background: color-mix(in srgb, var(--accent-red) 15%, transparent);
  color: var(--accent-red);
  display: block;
}
.diff-added {
  background: color-mix(in srgb, var(--accent-green) 15%, transparent);
  color: var(--accent-green);
  display: block;
}

/* ============================================
   二维码
   ============================================ */
.qr-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 24px 0;
}
.qr-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
}
.qr-wrapper canvas, .qr-wrapper img {
  border-radius: var(--radius-md);
}
.qr-options {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}
.qr-options .option-group input[type="number"],
.qr-options .option-group select {
  width: auto;
  min-width: 80px;
}

/* ============================================
   页脚
   ============================================ */
.footer {
  text-align: center;
  padding: 32px 24px;
  color: var(--text-muted);
  font-size: 13px;
  border-top: 1px solid var(--border-color);
  margin-top: 32px;
}
.footer a {
  color: var(--accent-1);
  text-decoration: none;
}

/* ============================================
   加载动画
   ============================================ */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-1);
  border-radius: 50%;
  animation: spin .6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================
   Toast 提示
   ============================================ */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-primary);
  opacity: 0;
  transition: all .3s ease;
  z-index: 999;
  pointer-events: none;
  box-shadow: var(--shadow-md);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.success { border-color: var(--accent-green); }
.toast.error { border-color: var(--accent-red); }

/* ============================================
   辅助类
   ============================================ */
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mb-8  { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }
.text-mono { font-family: var(--font-mono); }
.text-sm   { font-size: 13px; }
.text-muted { color: var(--text-muted); }

/* ============================================
   响应式 — 平板及以下
   ============================================ */
@media (max-width: 768px) {
  .tool-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px;
  }
  .tool-main {
    padding: 16px 16px 60px;
  }
  .tool-box {
    padding: 20px;
  }
  .markdown-input-area {
    grid-template-columns: 1fr;
  }
  .markdown-input-area textarea,
  .markdown-preview {
    min-height: 200px;
  }
  .diff-container {
    grid-template-columns: 1fr;
  }
  .page-header h1 {
    font-size: 24px;
  }
  .ip-info-grid {
    grid-template-columns: 1fr 1fr;
  }
  .status-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .tool-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .tool-card {
    padding: 16px 12px;
  }
  .tool-card .icon {
    font-size: 24px;
  }
  .ip-info-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   桌面增强 (>1024px)
   ============================================ */
@media (min-width: 1025px) {
  .tool-grid {
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 20px;
  }
  .tool-box {
    padding: 40px;
    border-radius: var(--radius-xl);
  }
  .page-header {
    padding: 72px 24px 40px;
  }
  .page-header h1 {
    font-size: 40px;
  }
}