/* ==========================================================================
   LibreHardwareMonitor 官网样式 - 主样式表
   配色：深黑灰底 + 工业黄强调 + 金属灰辅助
   ========================================================================== */

/* CSS 变量 --------------------------------------------------------------- */
:root {
  /* 主题色 */
  --color-bg: #0f0f10;
  --color-bg-2: #1a1a1c;
  --color-bg-3: #232327;
  --color-surface: #2a2a2e;
  --color-surface-2: #34343a;
  --color-border: #3a3a40;
  --color-border-light: #4a4a52;

  /* 强调色 - 工业黄 */
  --color-primary: #F5C518;
  --color-primary-dark: #E5B800;
  --color-primary-light: #FFD633;

  /* 文本色 */
  --color-text: #f5f5f7;
  --color-text-2: #c8c8cc;
  --color-text-3: #8e8e93;
  --color-text-muted: #6a6a70;

  /* 状态色 */
  --color-success: #34c759;
  --color-warning: #ff9500;
  --color-danger: #ff3b30;
  --color-info: #5ac8fa;

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
               Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono",
               Consolas, "Courier New", monospace;

  /* 尺寸 */
  --container: 1200px;
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-yellow: 0 4px 20px rgba(245, 197, 24, 0.25);

  /* 动画 */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --t-fast: 0.15s var(--ease);
  --t: 0.25s var(--ease);
  --t-slow: 0.4s var(--ease);
}

/* 基础重置 --------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--color-primary-light); }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6 { margin: 0 0 0.5em; font-weight: 700; line-height: 1.25; color: var(--color-text); letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
code, pre { font-family: var(--font-mono); }

/* 布局工具 ---------------------------------------------------------------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 80px 0; position: relative; }
.section-sm { padding: 48px 0; }
.grid { display: grid; gap: 24px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* 通用组件 ---------------------------------------------------------------- */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: all var(--t);
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
  user-select: none;
}
.btn-primary {
  background: var(--color-primary);
  color: #1a1a1a;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: #1a1a1a;
  transform: translateY(-1px);
  box-shadow: var(--shadow-yellow);
}
.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-light);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-ghost {
  background: transparent;
  color: var(--color-text-2);
  border-color: transparent;
  padding: 8px 16px;
}
.btn-ghost:hover { color: var(--color-primary); }
.btn-lg { padding: 16px 40px; font-size: 16px; }
.btn-sm { padding: 8px 18px; font-size: 13px; }

/* 标签徽章 */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 100px;
  background: rgba(245, 197, 24, 0.1);
  color: var(--color-primary);
  border: 1px solid rgba(245, 197, 24, 0.3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge-dot { width: 6px; height: 6px; background: var(--color-primary); border-radius: 50%; }

/* 标题区 */
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .badge { margin-bottom: 16px; }
.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 16px;
}
.section-head p { font-size: 17px; color: var(--color-text-3); margin: 0; }
.section-head .accent { color: var(--color-primary); }

/* 卡片 */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--t);
}
.card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* 头部导航 ---------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 15, 16, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  color: var(--color-text);
  text-decoration: none;
}
.brand-logo {
  width: 32px;
  height: 32px;
  display: block;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-2);
  border-radius: var(--radius-sm);
  transition: color var(--t-fast), background var(--t-fast);
}
.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
  background: rgba(245, 197, 24, 0.06);
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-text);
}
.nav-toggle:hover { background: var(--color-surface); }
.nav-toggle svg { width: 22px; height: 22px; }

/* 页脚 -------------------------------------------------------------------- */
.site-footer {
  background: #0a0a0b;
  border-top: 1px solid var(--color-border);
  padding: 56px 0 24px;
  margin-top: 80px;
  color: var(--color-text-3);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p { font-size: 14px; line-height: 1.7; max-width: 320px; }
.footer-col h4 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-2);
  margin-bottom: 16px;
  font-weight: 600;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col a {
  color: var(--color-text-3);
  font-size: 14px;
  transition: color var(--t-fast);
}
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
}
.footer-bottom a { color: var(--color-text-3); }
.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}
.footer-social a {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-3);
  transition: all var(--t-fast);
}
.footer-social a:hover { background: var(--color-primary); color: #1a1a1a; }
.footer-social svg { width: 18px; height: 18px; }

/* 弹窗 -------------------------------------------------------------------- */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 24px;
  animation: fadeIn var(--t);
}
.modal-mask.show { display: flex; }
.modal {
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  max-width: 580px;
  width: 100%;
  padding: 32px;
  position: relative;
  box-shadow: var(--shadow-lg);
  animation: slideUp var(--t);
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-text-3);
  transition: all var(--t-fast);
}
.modal-close:hover { background: var(--color-surface); color: var(--color-text); }
.modal-close svg { width: 18px; height: 18px; }
.modal h3 {
  font-size: 22px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.modal h3::before {
  content: "";
  width: 4px;
  height: 22px;
  background: var(--color-primary);
  border-radius: 2px;
}
.modal-desc { color: var(--color-text-3); font-size: 14px; margin-bottom: 24px; }
.modal-actions { display: flex; gap: 12px; }
.modal-actions .btn { flex: 1; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 二维码区 ---------------------------------------------------------------- */
.qr-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 24px 0;
}
.qr-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}
.qr-card-img {
  width: 170px;
  height: 170px;
  margin: 0 auto 8px;
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 8px;
}
.qr-card-img svg { width: 100%; height: 100%; }
.qr-card-label {
  font-size: 13px;
  color: var(--color-text-2);
  font-weight: 600;
}
.qr-card-sub {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* 滚动条 ------------------------------------------------------------------ */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-surface-2); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-border-light); }

/* 选中文本 ---------------------------------------------------------------- */
::selection { background: var(--color-primary); color: #1a1a1a; }

/* 焦点样式 ---------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* 响应式 ------------------------------------------------------------------ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .nav-menu { display: none; }
  .nav-menu.open {
    display: flex;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg-2);
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--color-border);
  }
  .nav-menu.open .nav-link {
    padding: 12px 16px;
    text-align: left;
  }
  .nav-toggle { display: flex; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; }
  .qr-grid { grid-template-columns: 1fr; }
  .modal { padding: 24px; }
}