/* ============================================================
   JetTUI — Sci-Fi Style GitHub Pages (统一排版版)
   ============================================================ */

:root {
  /* 配色 */
  --bg-deep:      #06080f;
  --bg-base:      #0a0e1a;
  --bg-card:      #0f1524;
  --bg-elev:      #141b2d;
  --border:       #1e293b;
  --border-glow:  rgba(0, 255, 209, 0.2);
  --text:         #e2e8f0;
  --text-dim:     #64748b;
  --text-mute:    #475569;
  --accent:       #00ffd1;
  --accent-2:     #7c3aed;
  --accent-3:     #fbbf24;

  /* 字体 */
  --font-display: 'Orbitron', sans-serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* 尺寸 */
  --max-width: 1200px;
  --radius:    12px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

/* ===== 背景层 ===== */
#particle-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 255, 209, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 209, 0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 0;
  pointer-events: none;
}

/* ===== 导航栏 ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 60px;
  background: rgba(6, 8, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent), 0 0 24px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(0.85); }
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  align-items: center;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-dim);
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--accent); }

.nav-gh {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #ffffff;
  transition: all 0.2s ease;
}

.nav-gh .gh-icon {
  display: inline-block;
  flex-shrink: 0;
}

.nav-gh:hover {
  border-color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

/* ===== Hero 首屏 ===== */
.hero-section {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6rem 2rem 10rem;
  text-align: center;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 860px;
  animation: hero-in 1s ease-out both;
}

@keyframes hero-in {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 4px;
  margin-bottom: 1.25rem;
  padding: 6px 14px;
  border: 1px solid rgba(0, 255, 209, 0.25);
  border-radius: 999px;
  background: rgba(0, 255, 209, 0.06);
  backdrop-filter: blur(4px);
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.25rem, 6vw, 4.25rem);
  line-height: 1.1;
  margin-bottom: 1.25rem;
  background: linear-gradient(180deg, #ffffff 0%, #a5f3d9 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 60px rgba(0, 255, 209, 0.18);
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(226, 232, 240, 0.85);
  line-height: 1.8;
  max-width: 680px;
  margin: 0 auto 2.25rem;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
}

.hero-actions {
  display: inline-flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.25s ease;
}

.hero-btn-primary {
  background: var(--accent);
  color: var(--bg-deep);
  box-shadow: 0 0 28px rgba(0, 255, 209, 0.28);
}

.hero-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 255, 209, 0.35), 0 0 40px rgba(0, 255, 209, 0.25);
}

.hero-btn-secondary {
  border: 1px solid var(--border);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(4px);
}

.hero-btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 255, 209, 0.06);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.hero-scroll-hint span {
  display: block;
  width: 20px;
  height: 32px;
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  border-radius: 12px;
  position: relative;
}

.hero-scroll-hint span::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  width: 4px;
  height: 6px;
  background: var(--accent);
  border-radius: 2px;
  transform: translateX(-50%);
  animation: scroll-wheel 1.6s ease-in-out infinite;
}

@keyframes scroll-wheel {
  0%   { opacity: 1; transform: translateX(-50%) translateY(0); }
  80%  { opacity: 0.2; transform: translateX(-50%) translateY(10px); }
  100% { opacity: 0.2; transform: translateX(-50%) translateY(10px); }
}

/* ===== Section 通用 ===== */
.section {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5rem 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  margin-bottom: 8px;
}

.section-desc {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* ===== TUI 模拟窗口(首屏) ===== */
.demo-section {
  padding: 0 2rem 5rem;
  margin-top: -5rem;
}

.tui-window {
  position: relative;
  z-index: 3;
  /* Textual dark 主题配色 */
  --tui-bg:       #1e1e2e;
  --tui-panel:    #181825;
  --tui-surface:  #313244;
  --tui-text:     #cdd6f4;
  --tui-text-dim: #7f849c;
  --tui-primary:  #89b4fa;
  --tui-accent:   #f5c2e7;
  --tui-success:  #a6e3a1;
  --tui-warning:  #f9e2af;
  --tui-error:    #f38ba8;
  --tui-border:   #585b70;

  max-width: 1100px;
  margin: 0 auto;
  background: var(--tui-bg);
  border: 1px solid var(--tui-border);
  border-radius: 6px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 13px;
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(0, 0, 0, 0.35),
    0 0 80px rgba(0, 0, 0, 0.4);
}

.tui-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 12px;
  background: var(--tui-panel);
  border-bottom: 1px solid var(--tui-border);
  color: var(--tui-text);
}

.header-title { font-weight: 700; font-size: 14px; }
.header-subtitle { color: var(--tui-text-dim); font-size: 13px; }

.tui-tabs {
  display: flex;
  border-bottom: 1px solid var(--tui-border);
  background: var(--tui-bg);
}

.tui-tab {
  padding: 4px 16px;
  background: transparent;
  border: none;
  border-right: 1px solid var(--tui-border);
  color: var(--tui-text-dim);
  font-family: var(--font-mono);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}

.tui-tab:hover { background: var(--tui-panel); color: var(--tui-text); }

.tui-tab.active {
  background: var(--tui-panel);
  color: var(--tui-text);
  border-top: 2px solid var(--tui-primary);
  font-weight: 600;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.mgr-title {
  padding: 4px 12px;
  font-weight: 700;
  font-size: 14px;
  color: var(--tui-accent);
}

.tui-main {
  display: flex;
  gap: 0;
  padding: 0 12px;
  height: 340px;
}

.tui-left {
  flex: 1;
  border: 1px solid var(--tui-primary);
  border-radius: 6px;
  padding: 4px 8px;
  margin-right: 8px;
  display: flex;
  flex-direction: column;
}

.tui-right {
  width: 320px;
  border: 1px solid var(--tui-accent);
  border-radius: 6px;
  padding: 4px 8px;
  display: flex;
  flex-direction: column;
}

.panel-label {
  font-weight: 700;
  color: var(--tui-accent);
  padding: 2px 0;
  font-size: 13px;
}

.tui-list {
  flex: 1;
  border: 1px solid var(--tui-panel);
  margin: 4px 0;
  overflow-y: auto;
  background: var(--tui-bg);
}

.tui-list::-webkit-scrollbar { width: 6px; }
.tui-list::-webkit-scrollbar-track { background: var(--tui-bg); }
.tui-list::-webkit-scrollbar-thumb { background: var(--tui-border); border-radius: 3px; }

.list-item {
  padding: 2px 8px;
  color: var(--tui-text-dim);
  cursor: pointer;
  transition: background 0.1s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.list-item:hover { background: var(--tui-surface); color: var(--tui-text); }

.list-item.selected {
  background: var(--tui-surface);
  color: var(--tui-text);
  font-weight: 600;
}

.tui-info {
  padding: 4px 8px;
  background: var(--tui-panel);
  color: var(--tui-text-dim);
  font-size: 12px;
  border-radius: 3px;
  min-height: 36px;
}

.tui-opt { padding: 3px 0; color: var(--tui-text); font-size: 13px; }

.tui-checkbox { padding: 3px 0; color: var(--tui-text); font-size: 13px; cursor: pointer; }

.tui-input {
  padding: 2px 8px;
  border: 1px solid var(--tui-border);
  border-radius: 3px;
  background: var(--tui-bg);
  color: var(--tui-text-dim);
  font-size: 12px;
  margin: 2px 0;
}

.tui-btn-row { display: flex; gap: 6px; margin: 4px 0; }

.tui-btn {
  flex: 1;
  padding: 3px 8px;
  border: 1px solid var(--tui-border);
  border-radius: 3px;
  background: var(--tui-surface);
  color: var(--tui-text);
  font-family: var(--font-mono);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
}

.tui-btn:hover { filter: brightness(1.2); }

.btn-success { border-color: var(--tui-success); color: var(--tui-success); }
.btn-warning { border-color: var(--tui-warning); color: var(--tui-warning); }
.btn-error   { border-color: var(--tui-error);   color: var(--tui-error); }
.btn-primary { border-color: var(--tui-primary); color: var(--tui-primary); }
.btn-default { color: var(--tui-text-dim); }

.tui-log-pane {
  margin: 8px 12px;
  border: 1px solid var(--tui-success);
  border-radius: 6px;
  padding: 4px 8px;
  height: 200px;
  display: flex;
  flex-direction: column;
}

.tui-main-single {
  display: flex;
  gap: 12px;
  padding: 0 12px;
  height: 180px;
}

.tui-env-col {
  flex: 1;
  border: 1px solid var(--tui-primary);
  border-radius: 6px;
  padding: 6px 10px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.tui-env-col .tui-input {
  margin: 6px 0;
  padding: 4px 8px;
  font-size: 13px;
}

.tui-env-col .tui-btn-row {
  margin-top: 6px;
}

.tui-log-tabs {
  display: flex;
  gap: 0;
  margin: 4px 0;
  border-bottom: 1px solid var(--tui-border);
}

.log-tab {
  padding: 2px 10px;
  background: transparent;
  border: none;
  border-right: 1px solid var(--tui-border);
  color: var(--tui-text-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  cursor: pointer;
}

.log-tab:hover { color: var(--tui-text); }

.log-tab.active {
  color: var(--tui-success);
  border-bottom: 2px solid var(--tui-success);
  background: var(--tui-panel);
}

.tui-log-view {
  flex: 1;
  border: 1px solid var(--tui-panel);
  margin: 4px 0;
  overflow: auto;
  padding: 4px 8px;
  background: var(--tui-bg);
}

.tui-log-view::-webkit-scrollbar { width: 6px; }
.tui-log-view::-webkit-scrollbar-track { background: var(--tui-bg); }
.tui-log-view::-webkit-scrollbar-thumb { background: var(--tui-border); border-radius: 3px; }

.tui-log-view pre {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--tui-text);
  white-space: pre-wrap;
  word-break: break-word;
}

.log-time    { color: var(--tui-text-dim); }
.log-info    { color: var(--tui-primary); }
.log-success { color: var(--tui-success); font-weight: 600; }
.log-warn    { color: var(--tui-warning); }
.log-cmd     { color: var(--tui-accent); font-weight: 600; }
.log-size    { color: var(--tui-warning); }

.cursor-line {
  color: var(--tui-success);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.check { color: var(--tui-success); display: inline-block; width: 28px; }
.tag { color: var(--tui-text-dim); font-size: 11px; }

.tui-footer {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 4px 12px;
  background: var(--tui-primary);
  color: var(--tui-bg);
  font-size: 12px;
}

.footer-key {
  display: inline-block;
  padding: 0 4px;
  background: var(--tui-bg);
  color: var(--tui-primary);
  border-radius: 2px;
  font-weight: 700;
  font-size: 11px;
  margin-right: 3px;
}

/* ===== 统一卡片基类 ===== */
/* feature-card / kb-table / contact-card / roadmap-card 共享 */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all 0.25s ease;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3), 0 0 24px rgba(0, 255, 209, 0.08);
}

/* ===== Features / Roadmap 网格 ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.card-lg {
  padding: 2.5rem;
  text-align: center;
}

.card-lg .card-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.card-lg h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}

.card-lg p {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.8;
}

.card-lg code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 1px 6px;
  background: var(--bg-elev);
  border-radius: 3px;
  color: var(--accent);
}

/* Roadmap 卡片(虚线边框 + 规划中标签) */
.roadmap-card {
  border-style: dashed;
  border-color: var(--accent-2);
}

.roadmap-card:hover {
  border-color: var(--accent-2);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3), 0 0 24px rgba(124, 58, 237, 0.12);
}

.roadmap-badge {
  display: inline-block;
  padding: 3px 12px;
  background: rgba(124, 58, 237, 0.15);
  border: 1px solid var(--accent-2);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-2);
  letter-spacing: 1px;
  margin-bottom: 12px;
}

/* ===== Footer ===== */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  text-align: center;
  background: var(--bg-deep);
}

.footer-contact {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.footer-contact-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
}

.footer-contact-icon { font-size: 1rem; }

.footer-contact-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-contact-value {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
}

.footer-contact-divider {
  color: var(--text-mute);
  opacity: 0.5;
}

.footer-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-mute);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .nav { padding: 0 1rem; height: 52px; }
  .nav-links { gap: 1rem; }
  .nav-links a { font-size: 0.8rem; }
  .nav-links a:not(.nav-gh) { display: none; }

  .hero-section { padding: 5rem 1rem 8rem; min-height: auto; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-btn { width: 100%; }
  .hero-scroll-hint { display: none; }

  .section { padding: 3rem 1rem; }
  .demo-section { padding: 0 1rem 3rem; margin-top: -3rem; }

  .tui-main { flex-direction: column; height: auto; }
  .tui-left { margin-right: 0; margin-bottom: 8px; min-height: 200px; }
  .tui-right { width: 100%; }
  .tui-log-pane { height: 160px; }

  .grid-2 { grid-template-columns: 1fr; }
}