/* =========================================================
   Demo Hub — 悬浮玻璃导航 + 冷雾粒子主题（列表式）
   视觉参考：resume/resume.html（暖纸主题）的冷色迭代版
   仅作用于 pages/demo/index.html，独立于主站与旧 demo 样式
   依赖钩子（demojs/demo-hub.js 使用，勿改名）：
   #d-particle-canvas #d-lang-toggle #d-theme-toggle
   [data-zh][data-en]
   body.dark-mode
========================================================= */

/* ---------- 01. 主题变量（日夜双套） ---------- */
:root {
  --d-text: #2e3440;
  --d-text-soft: #5a6572;
  --d-text-muted: #8b95a1;
  --d-bg: #eceff3;
  --d-glass: rgba(255, 255, 255, 0.60);
  --d-glass-strong: rgba(255, 255, 255, 0.82);
  --d-border: rgba(46, 52, 64, 0.10);
  --d-shadow: 0 14px 44px rgba(30, 42, 56, 0.10);
  --d-accent: #3e6d9c;
  --d-accent-soft: rgba(62, 109, 156, 0.10);
  --d-radius: 18px;
  --d-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --d-font-serif: Georgia, 'Times New Roman', 'Noto Serif SC', 'Songti SC', serif;
  --d-font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* 八个模块的强调色 */
  --d-k1: #4d8dff;
  --d-k2: #8f7bff;
  --d-k3: #34c759;
  --d-k4: #ff9500;
  --d-k5: #ff5f6d;
  --d-k6: #12b5a5;
  --d-k7: #5f7adb;
  --d-k8: #98a2ad;
}

body.dark-mode {
  --d-text: #e2e8f0;
  --d-text-soft: #a4b0be;
  --d-text-muted: #6b7885;
  --d-bg: #0a121e;
  --d-glass: rgba(13, 25, 40, 0.62);
  --d-glass-strong: rgba(20, 36, 56, 0.85);
  --d-border: rgba(255, 255, 255, 0.10);
  --d-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
  --d-accent: #7ba7cc;
  --d-accent-soft: rgba(123, 167, 204, 0.12);

  --d-k1: #6ea8ff;
  --d-k2: #a894ff;
  --d-k3: #4cd97b;
  --d-k4: #ffaa33;
  --d-k5: #ff7d88;
  --d-k6: #2ed3c2;
  --d-k7: #8296ec;
  --d-k8: #7d8894;
}

/* ---------- 02. Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--d-font);
  background: var(--d-bg);
  color: var(--d-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background 0.8s ease, color 0.8s ease;
}

/* ---------- 03. 背景层：粒子画布 + 氛围光 ---------- */
#d-particle-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.45;
  transition: opacity 0.8s ease;
}

body.dark-mode #d-particle-canvas {
  opacity: 0.6;
}

.d-atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(circle at 50% 34%, rgba(255, 255, 255, 0.55), transparent 46%);
  opacity: 0.7;
  transition: background 1.2s ease, opacity 1.2s ease;
}

body.dark-mode .d-atmosphere {
  background: radial-gradient(circle at 50% 34%, rgba(70, 130, 190, 0.15), transparent 50%);
  opacity: 0.85;
}

/* ---------- 04. 悬浮玻璃导航 ---------- */
.d-nav-wrapper {
  position: fixed;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: min(1100px, calc(100% - 36px));
  z-index: 100;
}

.d-header {
  height: 66px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 7px 10px 7px 14px;
  border-radius: var(--d-radius);
  background: var(--d-glass);
  border: 1px solid var(--d-border);
  backdrop-filter: blur(18px) saturate(125%);
  -webkit-backdrop-filter: blur(18px) saturate(125%);
  box-shadow: var(--d-shadow);
  transition: background 0.8s ease, border-color 0.8s ease, box-shadow 0.8s ease;
}

.d-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--d-text);
  font-weight: 650;
  font-size: 1.02rem;
  letter-spacing: -0.2px;
  white-space: nowrap;
}

.d-logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--d-text);
  background: var(--d-glass-strong);
  border: 1px solid var(--d-border);
  transition: transform 0.3s ease;
}

.d-logo:hover .d-logo-icon {
  transform: scale(1.06) rotate(-4deg);
}

.d-logo-beta {
  font-family: var(--d-font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.6px;
  color: var(--d-accent);
  background: var(--d-accent-soft);
  border: 1px solid var(--d-border);
  padding: 2px 8px;
  border-radius: 999px;
}

.d-nav-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.d-btn {
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0 13px;
  border: 1px solid transparent;
  border-radius: 11px;
  background: transparent;
  color: var(--d-text-soft);
  font-size: 0.82rem;
  font-weight: 550;
  font-family: var(--d-font);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.3s ease, background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.d-btn:hover {
  color: var(--d-text);
  background: var(--d-glass-strong);
  border-color: var(--d-border);
  transform: translateY(-1px);
}

.d-btn-icon {
  width: 38px;
  padding: 0;
}

.d-btn-lang {
  font-family: var(--d-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.4px;
}

.d-btn-home {
  background: var(--d-glass-strong);
  border-color: var(--d-border);
  color: var(--d-text);
}

/* ---------- 05. 页面主体 ---------- */
.d-page {
  position: relative;
  z-index: 1;
  flex: 1;
  width: min(1180px, calc(100% - 42px));
  margin: 0 auto;
  padding-top: 150px;
}

/* ---------- 06. Hero ---------- */
.d-hero {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 56px;
}

.d-hero-terminal {
  display: inline-block;
  font-family: var(--d-font-mono);
  font-size: 0.78rem;
  color: var(--d-text-soft);
  background: var(--d-glass);
  padding: 7px 17px;
  border-radius: 999px;
  border: 1px solid var(--d-border);
  margin-bottom: 26px;
  letter-spacing: 0.5px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background 0.8s ease, color 0.8s ease, border-color 0.8s ease;
}

.d-hero h1 {
  font-family: var(--d-font-serif);
  font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -1.6px;
  color: var(--d-text);
  margin-bottom: 20px;
  transition: color 0.8s ease;
}

.d-hero h1 .d-highlight {
  color: var(--d-accent);
}

.d-hero-desc {
  font-size: 0.98rem;
  color: var(--d-text-soft);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.9;
  transition: color 0.8s ease;
}

/* ---------- 07. 列表式模块板块（单板块 + 发丝分隔线） ---------- */
.d-list-section {
  padding-bottom: 90px;
}

/* 整块玻璃面板：所有模块集成在一个板块中 */
.d-list {
  border-radius: var(--d-radius);
  background: var(--d-glass);
  border: 1px solid var(--d-border);
  backdrop-filter: blur(16px) saturate(120%);
  -webkit-backdrop-filter: blur(16px) saturate(120%);
  box-shadow: var(--d-shadow);
  overflow: hidden;
  transition: background 0.8s ease, border-color 0.8s ease, box-shadow 0.8s ease;
}

/* 单行 */
.d-row {
  position: relative;
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 24px 30px;
  text-decoration: none;
  color: var(--d-text);
  border-bottom: 1px solid var(--d-border);
  transition: background 0.35s ease, border-color 0.8s ease;
}

.d-row:last-child {
  border-bottom: none;
}

/* 行首强调条：悬停时从左侧生长 */
.d-row::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  transform: scaleY(0);
  transform-origin: center;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.d-row:nth-child(1)::before { background: var(--d-k1); }
.d-row:nth-child(2)::before { background: var(--d-k2); }
.d-row:nth-child(3)::before { background: var(--d-k3); }
.d-row:nth-child(4)::before { background: var(--d-k4); }
.d-row:nth-child(5)::before { background: var(--d-k5); }
.d-row:nth-child(6)::before { background: var(--d-k6); }
.d-row:nth-child(7)::before { background: var(--d-k7); }
.d-row:nth-child(8)::before { background: var(--d-k8); }

.d-row:hover,
.d-row:focus-visible {
  background: var(--d-accent-soft);
}

.d-row:hover::before,
.d-row:focus-visible::before {
  transform: scaleY(1);
}

/* 队列中的占位行：不可点击 */
.d-row-queued {
  cursor: default;
}

.d-row-queued:hover {
  background: transparent;
}

.d-row-queued:hover::before {
  transform: scaleY(0);
}

/* 行内：图标 */
.d-row-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

.d-row:nth-child(1) .d-row-icon { background: linear-gradient(135deg, var(--d-k1), #7db4ff); }
.d-row:nth-child(2) .d-row-icon { background: linear-gradient(135deg, var(--d-k2), #b3a5ff); }
.d-row:nth-child(3) .d-row-icon { background: linear-gradient(135deg, var(--d-k3), #6fe39a); }
.d-row:nth-child(4) .d-row-icon { background: linear-gradient(135deg, var(--d-k4), #ffc046); }
.d-row:nth-child(5) .d-row-icon { background: linear-gradient(135deg, var(--d-k5), #ff8f99); }
.d-row:nth-child(6) .d-row-icon { background: linear-gradient(135deg, var(--d-k6), #4fd8c9); }
.d-row:nth-child(7) .d-row-icon { background: linear-gradient(135deg, var(--d-k7), #8ba0f0); }
.d-row:nth-child(8) .d-row-icon { background: linear-gradient(135deg, var(--d-k8), #b7bfc9); }

/* 行内：主信息（序号 + 标题 + 描述 + 标签） */
.d-row-main {
  flex: 1;
  min-width: 0;
}

.d-row-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 5px;
}

.d-row-num {
  font-family: var(--d-font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 1px;
  flex-shrink: 0;
}

.d-row:nth-child(1) .d-row-num { color: var(--d-k1); }
.d-row:nth-child(2) .d-row-num { color: var(--d-k2); }
.d-row:nth-child(3) .d-row-num { color: var(--d-k3); }
.d-row:nth-child(4) .d-row-num { color: var(--d-k4); }
.d-row:nth-child(5) .d-row-num { color: var(--d-k5); }
.d-row:nth-child(6) .d-row-num { color: var(--d-k6); }
.d-row:nth-child(7) .d-row-num { color: var(--d-k7); }
.d-row:nth-child(8) .d-row-num { color: var(--d-k8); }

.d-row-title {
  font-family: var(--d-font-serif);
  font-size: 1.16rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.3px;
  color: var(--d-text);
  transition: color 0.8s ease;
}

.d-row-meta {
  font-family: var(--d-font-mono);
  font-size: 0.7rem;
  color: var(--d-text-muted);
  letter-spacing: 0.3px;
  transition: color 0.8s ease;
}

.d-row-pill {
  font-family: var(--d-font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.5px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--d-border);
  background: var(--d-accent-soft);
  color: var(--d-accent);
  transition: background 0.8s ease, color 0.8s ease, border-color 0.8s ease;
}

.d-row-pill.queued {
  background: transparent;
  color: var(--d-text-muted);
}

.d-row-desc {
  font-size: 0.85rem;
  color: var(--d-text-soft);
  line-height: 1.7;
  transition: color 0.8s ease;
}

/* 行内：标签组 */
.d-row-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.d-row-tag {
  font-size: 0.7rem;
  font-family: var(--d-font-mono);
  padding: 3px 10px;
  border-radius: 7px;
  background: var(--d-accent-soft);
  color: var(--d-text-soft);
  border: 1px solid var(--d-border);
  white-space: nowrap;
  transition: background 0.8s ease, color 0.8s ease, border-color 0.8s ease;
}

/* 行内：箭头链接 */
.d-row-arrow {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.84rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
  color: var(--d-text);
}

.d-row:nth-child(1) .d-row-arrow { color: var(--d-k1); }
.d-row:nth-child(2) .d-row-arrow { color: var(--d-k2); }
.d-row:nth-child(3) .d-row-arrow { color: var(--d-k3); }
.d-row:nth-child(4) .d-row-arrow { color: var(--d-k4); }
.d-row:nth-child(5) .d-row-arrow { color: var(--d-k5); }
.d-row:nth-child(6) .d-row-arrow { color: var(--d-k6); }
.d-row:nth-child(7) .d-row-arrow { color: var(--d-k7); }
.d-row:nth-child(8) .d-row-arrow { color: var(--d-k8); }

.d-row-arrow i {
  font-size: 0.72rem;
  transition: transform 0.25s ease;
}

.d-row:hover .d-row-arrow i {
  transform: translateX(4px);
}

/* ---------- 08. 入场动画 ---------- */
.d-row {
  opacity: 0;
  transform: translateY(24px);
  animation: d-row-in 0.6s ease forwards;
}

.d-row:nth-child(1) { animation-delay: 0.06s; }
.d-row:nth-child(2) { animation-delay: 0.12s; }
.d-row:nth-child(3) { animation-delay: 0.18s; }
.d-row:nth-child(4) { animation-delay: 0.24s; }
.d-row:nth-child(5) { animation-delay: 0.30s; }
.d-row:nth-child(6) { animation-delay: 0.36s; }
.d-row:nth-child(7) { animation-delay: 0.42s; }
.d-row:nth-child(8) { animation-delay: 0.48s; }

@keyframes d-row-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 09. Footer ---------- */
.d-footer {
  position: relative;
  z-index: 1;
  margin-top: auto;
  text-align: center;
  padding: 1.8rem 1rem 2rem;
  border-top: 1px solid var(--d-border);
  background: var(--d-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  font-size: 0.84rem;
  color: var(--d-text-muted);
  transition: background 0.8s ease, color 0.8s ease, border-color 0.8s ease;
}

.d-footer a {
  color: var(--d-accent);
  text-decoration: none;
}

.d-footer a:hover {
  text-decoration: underline;
}

.d-footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 0.7rem;
}

.d-footer-motto {
  font-family: var(--d-font-serif);
  font-style: italic;
  color: var(--d-text-soft);
  margin-top: 0.7rem;
  font-size: 0.9rem;
  transition: color 0.8s ease;
}

/* ---------- 10. 响应式 ---------- */

/* 平板：收紧行距与导航 */
@media (max-width: 900px) {
  .d-nav-wrapper {
    width: calc(100% - 22px);
    top: 11px;
  }

  .d-header {
    height: 58px;
    border-radius: 15px;
  }

  .d-logo-name {
    display: none;
  }

  .d-page {
    padding-top: 110px;
  }

  .d-hero {
    margin-bottom: 40px;
  }

  .d-row {
    padding: 20px 20px;
    gap: 16px;
  }

  .d-row-title {
    font-size: 1.05rem;
  }
}

/* 手机：箭头移到主信息下方 */
@media (max-width: 640px) {
  .d-row {
    flex-wrap: wrap;
    padding: 20px 18px;
    gap: 14px;
  }

  .d-row-main {
    flex: 1 1 calc(100% - 66px);
  }

  .d-row-arrow {
    margin-left: 66px;
  }

  .d-hero h1 {
    letter-spacing: -1px;
  }

  .d-hero-desc {
    font-size: 0.9rem;
  }
}

/* 小屏手机 */
@media (max-width: 420px) {
  html {
    font-size: 14px;
  }

  .d-header {
    padding: 6px 7px 6px 10px;
  }

  .d-btn {
    padding: 0 9px;
  }

  .d-row-tags {
    gap: 4px;
  }

  .d-row-tag {
    font-size: 0.66rem;
    padding: 2px 7px;
  }
}

/* 减少动态效果 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }

  .d-row {
    opacity: 1;
    transform: none;
  }
}