:root {
  /* Colors - Core Palette */
  --bg-main: #fcfafc;
  --text-main: #1a1a1a;
  --text-muted: #4a4a4a;
  --border-primary: #2d3436;

  /* Colors - Form & UI */
  --border-textarea: #b4b6cb;
  --btn-bg: #eeeeee;
  --btn-hover-bg: #e6e6e6;
  --hover-bg: #e0e3ff;
  --focus-outline: #9ea2ff;

  /* Colors - Interactive States */
  --active-text: #f3f3f3;
  --active-bg: #5f55ec;

  /* Colors - Status & Alerts */
  --status-success: #00a63e;
  --status-warning: #ffdd57;
  --status-error: #b71c1c;
  --status-error-hover: #e03e3e;
  --status-error-text: #ffffff;
  --status-info: #ff8431;

  /* Spacing System (8px base) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 20px;
  --space-2xl: 24px;
  --space-3xl: 32px;
  --space-4xl: 40px;

  /* Responsive Breakpoints */
  --bp-sm: 480px;
  --bp-md: 768px;
  --bp-lg: 1024px;

  /* Typography */
  --font-main: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans", "Microsoft YaHei", "Microsoft JhengHei", sans-serif;
  --font-mono: "SF Mono", "Roboto Mono", "Source Code Pro", Menlo, Consolas, "Hiragino Sans GB", "Microsoft YaHei", "Hiragino Kaku Gothic ProN", "Meiryo", "Noto Sans Mono CJK SC", monospace;

  /* Line Heights */
  --lh-tight: 1.3;
  --lh-normal: 1.6;
  --lh-relaxed: 1.8;

  /* Border Radius */
  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 999px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
    font-family: "Noto Sans SC", "Noto Sans TC", sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.5;
    background: #fafafa;
    color: #222;
}

nav a {
    margin-left: 1rem;
    text-decoration: none;
    color: var(--active-bg);
}

main {
    padding: 1rem;
    max-width: 700px;
    margin: auto;
}
h1 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}
h2 {
    margin-top: 1.5rem;
}

h2,
h3,
section {
    scroll-margin-top: 4rem;
}

ul, ol {
    padding-left: 1.2rem;
}
ol li::marker,
ul li::marker { 
  color: var(--active-bg); 
}
a:link {
  color: var(--active-bg); 
  text-decoration: underline;  
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.15em;   
  transition: text-decoration 200ms ease, color 200ms ease;
}

a:visited {
  color: #8275ff;
}

a:hover {
  color: #8275ff;
  text-decoration-thickness: 0.16em; 
}


code {
  font-family: var(--font-mono);
  background-color: var(--btn-bg);
  color: var(--text-mutedr);
  padding: 0.2em 0.4em;
  border-radius: 0.4rem;
  font-size: 0.95em;
  border: 1px solid var(--border-textarea);
  box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.1);
}

section#demo {
    margin-top: 2.5rem;
}
#faq p {
    margin-top: 0;
    margin-bottom: 1.25rem;
}



/* 页面开头 */

.header-center-box {
  text-align: center;
  padding: 1rem;
}

.header-center {
  display: inline-block;
}
.header-center .icon {
  height: 64px;
  border-radius: var(--radius-md);
}
.header-center h1 {
  margin: 0.3rem 0 0;
}
.header-center .slogan {
  margin: 0;
  color: var(--active-bg);
  font-weight: 500;
}





/* 放大图片画廊 */
#img-modal {
  display: none;
  position: fixed;
  top:0; left:0; width:100%; height:100%;
  background: rgba(0,0,0,0.9);
  justify-content: center;
  align-items: center;
  z-index: 9999;
  flex-direction: column;
}
#img-modal img {
  max-width: 90%;
  max-height: 80%;
  border-radius: 6px;
}
#img-modal .caption {
  margin-top: 0.5rem;
  color: #eee;
  font-size: 0.9rem;
  text-align: center;
  padding-inline: 0.8em;
  max-width: 70%;
}
#img-modal .arrow {
  position: absolute;
  top: 50%;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
  user-select: none;
  padding: 0 0.5rem;
}
#img-modal .arrow.left { left: 0.5rem; }
#img-modal .arrow.right { right: 0.5rem; }



/* Demo Section */
#demo {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

/* Window frame — same style for all images */
.window-frame {
  background: #fff;
  overflow: hidden;
  border: 2px solid var(--border-primary);
  border-radius: 8px;
  box-shadow: 4px 4px 0 var(--border-primary);
}

.window-frame img {
  width: 100%;
  display: block;
  object-fit: cover;
  object-position: top center;
}

/* Wide row: image on one side, text on the other */
.demo-row.wide {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.demo-row.wide.reverse {
  grid-template-columns: 1fr 2fr;
}

/* Two-column row: two images (or image + text) side by side */
.demo-row.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

/* For the tall image (demo4.png, 912x1522), cap its height */
.demo-row.wide.reverse .window-frame img {
  object-position: top center;
}

.demo-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.demo-col.text-only {
  justify-content: center;
  padding: 1rem 0;
}

.demo-caption {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin: 0;
}

.demo-text h3,
.demo-col h3 {
  font-size: 1.3rem;
  color: var(--active-bg);
  margin: 0 0 0.5rem;
}

.demo-text p,
.demo-col p {
  margin: 0 0 0.5rem;
}

@media (max-width: 768px) {
  .demo-row.wide,
  .demo-row.wide.reverse,
  .demo-row.two-col {
    grid-template-columns: 1fr;
  }
  .demo-row.wide.reverse .window-frame img {
    max-height: none;
  }
}



section#beforeatry {
  padding-top: 1.5rem;
}













/* 注释 */

.note {
  color: #999;
  font-size: 0.85rem;
  margin: 0.5rem 0;
}
.note::before {
  content: "/*";
  display: inline-block;
  height: 18px;
  margin-right: .3rem;
}
.note::after {
  content: "*/";
  display: inline-block;
  height: 18px;
  margin-left: .3rem;
}


/* 符号 */

section#beforeatry ul.supportOrNot {
  list-style: none;
}

/* ==============================
   BUTTONS
============================== */
button {
  cursor: pointer;
  background-color: var(--btn-bg);
  color: var(--text-main);
  font-weight: 600;
  font-size: 1rem;
  padding: var(--space-sm) var(--space-md);
  line-height: var(--lh-tight);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 0 var(--border-primary);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

button:hover {
  background-color: var(--btn-hover-bg);
  transform: translateY(-2px);
  box-shadow: 0 6px 0 var(--border-primary);
}

button:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 var(--border-primary);
  transition: none;
}

button:focus-visible {
  background-color: var(--btn-hover-bg);
  box-shadow: 0 0 0 3px var(--focus-outline);
  transform: translateY(-2px);
}

/* Header Actions Buttons*/

.header-actions {
  margin-top: var(--space-md);
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.header-actions .headerBtn {
  display: flex;
  align-items: center;
  padding: var(--space-xs) var(--space-md);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  background-color: var(--btn-bg);
  color: var(--text-main);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 0 var(--border-primary);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
}

.header-actions .headerBtn:hover {
  background-color: var(--btn-hover-bg);
  transform: translateY(-2px);
  box-shadow: 0 6px 0 var(--border-primary);
}

.header-actions .headerBtn:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 var(--border-primary);
  transition: none;
}


/* Button Icon Base Styles */
.githubBtn::before,
.installBtn::before,
.changlogBtn::before,
.backHomeBtn::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 18px;
  margin-right: var(--space-xs);
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
}

.githubBtn::before {
  background-image: url('data:image/svg+xml,%3Csvg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M12 .297c-6.63 0-12 5.373-12 12 0 5.303 3.438 9.8 8.205 11.385.6.113.82-.258.82-.577 0-.285-.01-1.04-.015-2.04-3.338.724-4.042-1.61-4.042-1.61C4.422 18.07 3.633 17.7 3.633 17.7c-1.087-.744.084-.729.084-.729 1.205.084 1.838 1.236 1.838 1.236 1.07 1.835 2.809 1.305 3.495.998.108-.776.417-1.305.76-1.605-2.665-.3-5.466-1.332-5.466-5.93 0-1.31.465-2.38 1.235-3.22-.135-.303-.54-1.523.105-3.176 0 0 1.005-.322 3.3 1.23.96-.267 1.98-.399 3-.405 1.02.006 2.04.138 3 .405 2.28-1.552 3.285-1.23 3.285-1.23.645 1.653.24 2.873.12 3.176.765.84 1.23 1.91 1.23 3.22 0 4.61-2.805 5.625-5.475 5.92.42.36.81 1.096.81 2.22 0 1.606-.015 2.896-.015 3.286 0 .315.21.69.825.57C20.565 22.092 24 17.592 24 12.297c0-6.627-5.373-12-12-12"/%3E%3C/svg%3E');
}

.installBtn::before {
  background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"%3E%3Cpath d="M4 17v2a2 2 0 0 0 2 2h12a2 2 0 0 0 2 -2v-2" /%3E%3Cpath d="M7 11l5 5l5 -5" /%3E%3Cpath d="M12 4l0 12" /%3E%3C/svg%3E');
}

.changlogBtn::before {
  background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"%3E%3Cpath d="m14 18 4-4 4 4" /%3E%3Cpath d="M16 2v4" /%3E%3Cpath d="M18 22v-8" /%3E%3Cpath d="M21 11.343V6a2 2 0 0 0-2-2H5a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h9" /%3E%3Cpath d="M3 10h18" /%3E%3Cpath d="M8 2v4" /%3E%3C/svg%3E');
}

.backHomeBtn::before {
  background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"%3E%3Cpath d="M5 12l-2 0l9 -9l9 9l-2 0" /%3E%3Cpath d="M5 12v7a2 2 0 0 0 2 2h10a2 2 0 0 0 2 -2v-7" /%3E%3Cpath d="M9 21v-6a2 2 0 0 1 2 -2h2a2 2 0 0 1 2 2v6" /%3E%3C/svg%3E');
}


/* keyboard guide section */

#keyboard-guide {
  margin-top: 40px;
}

.shortcut-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.shortcut-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  align-items: start;
  gap: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid #efefef;
}

/* Style for the Keyboard keys */
kbd {
  background-color: #f7f6f3;
  border: 1px solid #e0e0e0;
  border-radius: 3px;
  box-shadow: 0 1px 1px rgba(0,0,0,0.1);
  color: #37352f;
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85em;
  font-weight: 600;
  line-height: 1;
  padding: 3px 5px;
  white-space: nowrap;
}

.shortcut-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: #37352f;
}

.sub-text {
  font-size: 12px !important;
  color: #73726e !important;
  margin-top: 8px !important;
}

/* Mobile Responsiveness */
@media (max-width: 600px) {
  .shortcut-item {
    grid-template-columns: 1fr; /* Stack vertically on phones */
    gap: 8px;
  }
  
  .keys {
    margin-bottom: 4px;
  }
}


footer {
    text-align: center;
    padding: 1rem;
    font-size: 0.85rem;
    color: #555;
    border-top: 1px solid #efefef;
}

.license-text p {
  margin: 0 0 8px 0;
  opacity: 0.8;
}

.announcement {
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-xl);
  font-size: 0.875rem;
  flex-wrap: wrap;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-primary); 
}