/* ===== Reset / 盒模型基线 ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
img { display: block; max-width: 100%; }
ul, ol { list-style: none; }
a { text-decoration: none; color: inherit; }
button { border: none; background: none; font: inherit; color: inherit; cursor: pointer; }
:focus:not(:focus-visible) { outline: none; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

/* ===== 排版基线 ===== */
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Noto Sans SC", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
.mono {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, monospace;
}
::selection { background: var(--brand); color: #fff; }

/* ===== 语义变量 ===== */
:root {
  --canvas: #fafbfb;
  --surface: #ffffff;
  --surface-hover: #eef1f1;
  --brand: #0f766e;
  --brand-hover: #0a5d56;
  --brand-weak: rgba(15, 118, 110, 0.08);
  --brand-text: #0b6a63;
  --text-primary: #191b1e;
  --text-secondary: #5b636c;
  --text-tertiary: #6e757d;
  --border: #e8ebec;
  --shadow-sm: 0 1px 2px rgba(19, 28, 32, 0.05);
  --shadow-md: 0 6px 20px rgba(19, 28, 32, 0.07);
  --shadow-lg: 0 16px 48px rgba(19, 28, 32, 0.10);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: 220ms cubic-bezier(0.33, 1, 0.68, 1);
  --max: 1100px;
  --gutter: 24px;
  --nav-height: 56px;
}

/* ===== 自定义滚动条 ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(25, 27, 30, 0.14); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(25, 27, 30, 0.26); }
* { scrollbar-width: thin; scrollbar-color: rgba(25, 27, 30, 0.14) transparent; }

/* ===== 导航 ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-height);
  background: rgba(250, 251, 251, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto;
  height: 100%;
  padding: 0 var(--gutter);
  display: flex; align-items: center; gap: 32px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 28px; height: 28px;
  border-radius: var(--radius-sm);
  background: var(--brand); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
  transition: transform var(--transition);
}
.brand:hover .brand-mark { transform: rotate(-8deg); }
.brand-name { font-size: 15px; font-weight: 700; letter-spacing: 0.2px; }
.brand-ver { font-size: 11px; color: var(--text-tertiary); }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 500;
  color: var(--text-secondary);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav-link svg { width: 14px; height: 14px; }
.nav-link-out { color: var(--text-primary); }
.menu-btn {
  display: none;
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}
.menu-btn svg { width: 20px; height: 20px; }
.menu-btn .icon-close { display: none; }
.menu-btn[aria-expanded="true"] .icon-menu { display: none; }
.menu-btn[aria-expanded="true"] .icon-close { display: block; }

/* ===== 首屏 Hero ===== */
.hero { padding: calc(var(--nav-height) + 56px) 0 24px; }
.hero-inner {
  max-width: var(--max); margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 64px;
  align-items: start;
}
.hero-copy { padding-top: 8px; }
.hero-meta {
  font-size: 12px; color: var(--text-tertiary);
  letter-spacing: 0.4px;
  margin-bottom: 16px;
}
.hero-title {
  font-size: 20px; font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.2px;
  margin-bottom: 16px;
}
.hero-desc {
  font-size: 14px; color: var(--text-secondary);
  max-width: 460px;
  margin-bottom: 28px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-note {
  margin-top: 28px;
  font-size: 11px; color: var(--text-tertiary);
  letter-spacing: 0.2px;
}

/* 门禁自检面板 */
.gate-panel {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-lg);
  margin-top: 12px;
}
.gate-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
}
.gate-head .mono { font-size: 11px; color: var(--text-tertiary); letter-spacing: 0.4px; }
.gate-count {
  font-size: 12px; font-weight: 600; color: var(--brand);
  transition: color var(--transition);
}
.gate-list { display: flex; flex-direction: column; gap: 2px; }
.gate-item {
  display: flex; align-items: center; gap: 12px;
  width: 100%; text-align: left;
  padding: 9px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.gate-box {
  width: 20px; height: 20px; flex-shrink: 0;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.gate-box svg { width: 11px; height: 11px; opacity: 0; transform: scale(0.4); transition: opacity var(--transition), transform var(--transition); }
.gate-no { font-size: 11px; font-weight: 600; color: var(--text-tertiary); width: 20px; flex-shrink: 0; }
.gate-text { font-size: 13px; color: var(--text-secondary); transition: color var(--transition), font-weight var(--transition); }
.gate-item:hover .gate-text { color: var(--text-primary); }
.gate-item[aria-checked="true"] .gate-box {
  background: var(--brand); border-color: var(--brand);
}
.gate-item[aria-checked="true"] .gate-box svg { opacity: 1; transform: scale(1); }
.gate-item[aria-checked="true"] .gate-no { color: var(--brand); }
.gate-item[aria-checked="true"] .gate-text { color: var(--text-primary); font-weight: 600; }
.gate-result {
  display: flex; align-items: center; gap: 8px;
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--surface-hover);
  color: var(--text-secondary);
  font-size: 13px; font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.gate-result-icon {
  width: 16px; height: 16px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.gate-result-icon svg { width: 14px; height: 14px; opacity: 0; transition: opacity var(--transition); }
.gate-result.passed { background: var(--brand); color: #fff; }
.gate-result.passed .gate-result-icon svg { opacity: 1; }
.gate-foot {
  margin-top: 12px;
  text-align: right;
  font-size: 10px; color: var(--text-tertiary);
  letter-spacing: 0.3px;
}

/* ===== 主体布局与区段 ===== */
.section {
  max-width: var(--max); margin: 0 auto;
  padding: 72px var(--gutter);
}
.section-head { margin-bottom: 32px; }
.section-title { font-size: 17px; font-weight: 700; letter-spacing: -0.2px; }
.section-desc {
  font-size: 13px; color: var(--text-secondary);
  margin-top: 8px;
  max-width: 560px;
}

/* 能力：说明书式列表 */
.cap-list { max-width: 760px; }
.cap-item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  padding: 18px 12px;
  border-radius: var(--radius-md);
  transition: background var(--transition);
}
.cap-id { font-size: 12px; font-weight: 600; color: var(--brand); padding-top: 2px; }
.cap-name { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.cap-text { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

/* 反模式 */
.reject-list { max-width: 640px; }
.reject-item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 8px;
  border-radius: var(--radius-md);
  transition: background var(--transition);
}
.reject-icon {
  width: 22px; height: 22px; flex-shrink: 0;
  border-radius: 50%;
  background: var(--brand-weak); color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  margin-top: 2px;
}
.reject-icon svg { width: 12px; height: 12px; }
.reject-text { font-size: 13.5px; color: var(--text-primary); line-height: 1.6; }

/* ===== 组件 ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  height: 40px; padding: 0 18px;
  border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 600;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform 90ms ease;
}
.btn:active { transform: scale(0.97); }
.btn svg { width: 15px; height: 15px; flex-shrink: 0; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-hover); box-shadow: 0 4px 14px rgba(15, 118, 110, 0.28); }
.btn-secondary { background: var(--surface); color: var(--text-primary); box-shadow: var(--shadow-sm); }
.btn-secondary:hover { background: var(--surface-hover); }

/* 作品 */
.section-works { padding-bottom: 80px; }
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.work-card {
  display: flex; flex-direction: column;
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 12px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.work-media {
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--surface-hover);
}
.work-media img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: top;
  transition: transform 300ms cubic-bezier(0.33, 1, 0.68, 1);
}
.work-meta { padding: 14px 6px 8px; }
.work-tag { display: inline-block; font-size: 11px; color: var(--brand); font-weight: 600; margin-bottom: 6px; }
.work-name { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.work-desc { font-size: 12.5px; color: var(--text-secondary); line-height: 1.6; }

/* 使用 */
.install-row { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }
.install-code {
  flex: 1; min-width: 280px;
  background: var(--surface);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  padding: 0 18px;
  display: flex; align-items: center;
  font-size: 13px; color: var(--text-primary);
  overflow-x: auto; white-space: nowrap;
}
.tool-list { display: flex; flex-direction: column; gap: 28px; max-width: 640px; }
.tool-item { display: grid; grid-template-columns: 48px 1fr; gap: 16px; }
.tool-no { font-size: 12px; font-weight: 600; color: var(--text-tertiary); padding-top: 3px; }
.tool-name { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.tool-text { font-size: 13px; color: var(--text-secondary); margin-bottom: 10px; }
.tool-code {
  display: block;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 12px; color: var(--brand-text);
  overflow-x: auto; white-space: nowrap;
}
.flow { margin-top: 48px; }
.flow-head {
  font-size: 11px; color: var(--text-tertiary);
  letter-spacing: 0.4px;
  margin-bottom: 14px;
}
.flow-list { display: flex; flex-wrap: wrap; gap: 10px; }
.flow-list li {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-sm);
  padding: 9px 14px;
  font-size: 13px; font-weight: 500; color: var(--text-primary);
}
.flow-list li span { font-size: 11px; font-weight: 600; color: var(--brand); }

/* CTA */
.cta {
  max-width: var(--max); margin: 0 auto;
  padding: 0 var(--gutter) 80px;
}
.cta-inner {
  background: var(--brand-weak);
  border-radius: var(--radius-lg);
  padding: 56px 32px;
  text-align: center;
}
.cta-title { font-size: 18px; font-weight: 700; letter-spacing: -0.2px; }
.cta-desc { font-size: 14px; color: var(--text-secondary); margin-top: 10px; }
.cta-actions {
  display: flex; gap: 12px; justify-content: center;
  margin-top: 24px; flex-wrap: wrap;
}

/* Footer */
.footer {
  max-width: var(--max); margin: 0 auto;
  padding: 32px var(--gutter) 48px;
}
.footer-inner {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.footer-copy { font-size: 12px; color: var(--text-tertiary); }
.footer-meta { font-size: 11px; color: var(--text-tertiary); letter-spacing: 0.3px; }
.footer-links { margin-left: auto; display: flex; gap: 20px; }
.footer-links a { font-size: 12px; color: var(--text-secondary); transition: color var(--transition); }

/* Toast */
.toast {
  position: fixed; top: 20px; left: 50%;
  z-index: 999;
  transform: translateX(-50%) translateY(-12px);
  background: var(--brand); color: #fff;
  font-size: 13px; font-weight: 500;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* 滚动渐入 */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 500ms cubic-bezier(0.33, 1, 0.68, 1), transform 500ms cubic-bezier(0.33, 1, 0.68, 1);
}
.reveal.in { opacity: 1; transform: translateY(0); }

/* ===== 悬停状态（精确指针） ===== */
@media (hover: hover) and (pointer: fine) {
  .nav-link:hover { color: var(--text-primary); background: var(--surface-hover); }
  .gate-item:hover { background: var(--surface-hover); }
  .cap-item:hover { background: var(--surface-hover); }
  .reject-item:hover { background: var(--surface-hover); }
  .work-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
  .work-card:hover .work-media img { transform: scale(1.03); }
  .footer-links a:hover { color: var(--text-primary); }
  .menu-btn:hover { background: var(--surface-hover); color: var(--text-primary); }
}

/* ===== 响应式断点 ===== */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding-top: calc(var(--nav-height) + 40px); }
  .works-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --gutter: 16px; }
  .hero { padding-top: calc(var(--nav-height) + 32px); }
  .hero-title { font-size: 19px; }
  .section { padding: 56px 16px; }
  .works-grid { grid-template-columns: 1fr; }
  .section-works { padding-bottom: 64px; }

  /* 移动端导航：折叠菜单 */
  .menu-btn { display: flex; margin-left: auto; }
  .nav-links {
    position: absolute; top: calc(var(--nav-height) + 8px); left: 16px; right: 16px;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 10px;
    max-height: 0; overflow: hidden; opacity: 0;
    transform: translateY(-6px);
    transition: max-height 260ms cubic-bezier(0.33, 1, 0.68, 1), opacity 220ms var(--transition), transform 220ms var(--transition);
  }
  .nav-links.open { max-height: 340px; opacity: 1; transform: translateY(0); }
  .nav-link { padding: 12px 14px; font-size: 14px; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { margin-left: 0; }
  .cta-inner { padding: 40px 20px; }
  .cap-item { grid-template-columns: 44px 1fr; gap: 12px; padding: 14px 8px; }
  .tool-item { grid-template-columns: 40px 1fr; gap: 12px; }
  .install-code { min-width: 0; height: 44px; }
}

/* ===== 动效降级 ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}