/* ===== 基础 ===== */
:root {
  --bg: #1a1a1a;
  --bg2: #222;
  --card: #292929;
  --accent: #FF6B3F;
  --accent-hover: #e55a30;
  --text: #F5EBDC;
  --text-dim: rgba(245,235,220,.6);
  --border: rgba(245,235,220,.15);
  --radius: 16px;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
h2 { font-size: 28px; font-weight: 700; text-align: center; margin-bottom: 40px; }

/* ===== 导航 ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 0 24px; height: 56px;
  display: flex; align-items: center;
  transition: background .3s;
}
.nav.scrolled { background: rgba(26,26,26,.92); backdrop-filter: blur(10px); }
.nav-inner {
  max-width: 1100px; width: 100%; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { font-size: 18px; font-weight: 700; letter-spacing: 1px; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { font-size: 14px; color: var(--text-dim); transition: color .2s; }
.nav-links a:hover { color: var(--text); }
.nav-login-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 20px;
  background: rgba(255,255,255,.08); border: 1px solid var(--border);
  font-size: 13px; transition: all .2s;
}
.nav-login-btn:hover { background: rgba(255,255,255,.15); }

/* ===== Hero ===== */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  padding: 80px 24px 60px;
}

/* 大屏幕 */
.hero-screen {
  width: 100%; max-width: 1050px; aspect-ratio: 16/9;
  background: #111; border-radius: 16px;
  border: 4px solid #333;
  box-shadow: 0 24px 80px rgba(0,0,0,.6), inset 0 0 0 1px rgba(255,255,255,.04);
  overflow: hidden; position: relative;
}
.hero-screen-inner { width: 100%; height: 100%; position: relative; }
/* 壁纸 */
.mock-wallpaper {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, #0a1628 0%, #1a1a2e 40%, #16213e 70%, #0f3460 100%);
}
/* 任务栏 */
.mock-taskbar {
  position: absolute; bottom: 0; left: 0; right: 0; height: 32px;
  background: rgba(0,0,0,.5); backdrop-filter: blur(10px);
  display: flex; align-items: center; padding: 0 14px; gap: 8px;
  z-index: 4;
}
.mock-taskbar-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,.15);
}
.mock-taskbar-time {
  margin-left: auto; font-size: 11px; color: rgba(255,255,255,.6);
}

/* 左侧：品牌区 */
.hero-left {
  position: absolute; top: 0; left: 0; bottom: 32px;
  width: calc(100% - 180px);
  display: flex; flex-direction: column; justify-content: center;
  padding: 0 48px;
  z-index: 3;
  overflow: hidden;
}
.hero-left h1 {
  font-size: 52px; font-weight: 800; margin-bottom: 10px;
  text-shadow: 0 2px 20px rgba(0,0,0,.5);
}
.hero-tagline {
  font-size: 18px; color: var(--accent); font-weight: 600; margin-bottom: 10px;
  text-shadow: 0 1px 8px rgba(0,0,0,.4);
}
.hero-desc {
  font-size: 14px; color: rgba(245,235,220,.75); margin-bottom: 28px; line-height: 1.8;
  text-shadow: 0 1px 4px rgba(0,0,0,.3);
}
.hero-btns { display: flex; gap: 10px; }

/* 右侧：吸附 app */
.mock-dock-app {
  position: absolute; top: 0; right: 0; bottom: 32px;
  width: 180px; background: rgba(41,41,41,.95);
  border-left: 6px solid rgba(245,235,220,.2);
  display: flex; flex-direction: column;
  padding: 8px; gap: 6px;
  z-index: 5;
}
/* 卡槽：负责布局，动画操作这个元素 */
.dock-slot {
  flex: 1; min-height: 0;
  display: flex;
}
/* 卡片：纯内容，不参与布局计算 */
.mock-dock-card {
  background: rgba(41,41,41,.9); border-radius: 12px;
  border: 6px solid rgba(245,235,220,.12);
  padding: 10px; text-align: center;
  width: 100%;
  display: flex; flex-direction: column; justify-content: center;
  overflow: hidden;
}
.mdc-label { font-size: 10px; color: rgba(245,235,220,.5); }
.mdc-date { font-size: 10px; color: rgba(245,235,220,.4); margin: 2px 0; }
.mdc-num { font-size: 52px; font-weight: 900; line-height: 1; color: var(--text); }
.mdc-unit { font-size: 11px; color: rgba(245,235,220,.5); }
.mock-dock-todo { text-align: left; justify-content: flex-start; }
.mdt-title { font-size: 10px; font-weight: 600; color: rgba(245,235,220,.6); margin-bottom: 6px; }
.mdt-item { font-size: 10px; color: rgba(245,235,220,.8); display: flex; align-items: center; gap: 5px; padding: 4px 0; }
.mdt-dot { width: 8px; height: 8px; border-radius: 3px; border: 2px solid rgba(245,235,220,.3); flex-shrink: 0; }
.mdt-done { text-decoration: line-through; opacity: .4; }
.mdt-done .mdt-dot { background: var(--accent); border-color: var(--accent); }
/* 底部按钮栏 */
.mock-dock-bar {
  margin-top: auto; display: flex; justify-content: center; gap: 14px;
  padding: 8px 0;
  order: 99;
}
.mdb-btn { font-size: 14px; opacity: .5; }
/* Hero 鼠标光标 */
.hero-cursor {
  position: absolute; width: 16px; height: 16px; z-index: 20;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath d='M0 0L11 8L5 9L4 16Z' fill='white' stroke='%23333' stroke-width='.5'/%3E%3C/svg%3E") no-repeat;
  pointer-events: none;
  filter: drop-shadow(0 1px 3px rgba(0,0,0,.6));
  left: 0; top: 0; opacity: 0;
}
/* 拖拽高亮由 GSAP 内联控制 */
/* 日历卡 */
.dock-card-2 { padding: 8px !important; text-align: left !important; }
.mdc-cal-header { font-size: 11px; font-weight: 700; color: rgba(245,235,220,.7); margin-bottom: 4px; }
.mdc-cal-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; font-size: 8px; text-align: center; color: rgba(245,235,220,.4); }
.mdc-cal-day { color: rgba(245,235,220,.6); padding: 2px 0; }
.mdc-cal-today { background: var(--accent); color: #fff; border-radius: 3px; font-weight: 700; }
/* 文字字符动画 */
.hero-title-cycle {
  font-size: 52px; font-weight: 800; margin-bottom: 10px;
  display: flex; align-items: baseline; gap: 2px;
  text-shadow: 0 2px 20px rgba(0,0,0,.5);
  position: relative; height: 72px;
}
.tc-char {
  display: inline-block; position: relative;
  cursor: default;
}
.tc-cursor {
  color: var(--accent); font-weight: 300; font-size: 48px;
  animation: blink 1s step-end infinite; margin-left: 2px;
  align-self: center;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
/* 文字区的鼠标光标 */
.text-cursor {
  position: absolute; width: 14px; height: 14px; z-index: 20;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath d='M0 0L10 7L4 8L3 14Z' fill='white' stroke='%23333' stroke-width='.5'/%3E%3C/svg%3E") no-repeat;
  pointer-events: none;
  filter: drop-shadow(0 1px 3px rgba(0,0,0,.6));
  opacity: 0;
  transition: left .3s ease, top .3s ease, opacity .15s;
}
/* 卡片过渡（由 GSAP 控制，不加 CSS transition） */

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 10px;
  font-size: 14px; font-weight: 600;
  transition: all .2s; cursor: pointer;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-secondary { background: rgba(245,235,220,.1); color: var(--text); }
.btn-secondary:hover { background: rgba(245,235,220,.18); }
.btn-sm { padding: 10px 20px; font-size: 13px; }

/* ===== 功能 ===== */
.features { padding: 80px 24px; }
.section-inner { max-width: 1100px; margin: 0 auto; }
.feature-grid {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 16px;
}
.feature-grid .demo-card {
  flex: 0 0 calc(25% - 12px);
  max-width: calc(25% - 12px);
}
/* 新功能卡（无动画 demo） */
.demo-card-static .demo-screen {
  display: flex; align-items: center; justify-content: center;
}
.demo-card-static .demo-icon {
  font-size: 48px; opacity: .8;
}
/* ===== 动态演示面板 ===== */
.demo-card {
  background: var(--card); border-radius: var(--radius);
  overflow: hidden; border: 1px solid var(--border);
}
.demo-card h3 { font-size: 16px; margin: 16px 20px 4px; }
.demo-card p { font-size: 13px; color: var(--text-dim); margin: 0 20px 16px; }
.demo-screen {
  position: relative; height: 200px; overflow: hidden;
  background: linear-gradient(135deg, #1a1a1a, #222);
}
/* 鼠标光标 */
.demo-cursor {
  position: absolute; width: 14px; height: 14px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath d='M0 0L10 7L4 8L3 14Z' fill='white' stroke='%23333' stroke-width='.5'/%3E%3C/svg%3E") no-repeat;
  z-index: 10; pointer-events: none;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,.5));
}

/* --- 1. 倒计时动画 --- */
.demo-countdown {
  position: absolute; top: 20px; left: 50%; transform: translateX(-50%);
  width: 160px; padding: 14px; text-align: center;
  background: var(--card); border-radius: 12px; border: 6px solid rgba(245,235,220,.2);
}
.dc-label { font-size: 10px; color: var(--text-dim); }
.dc-date { font-size: 10px; color: var(--text-dim); margin: 2px 0; }
.dc-num { font-size: 48px; font-weight: 900; line-height: 1; overflow: hidden; }
.dc-unit { font-size: 11px; color: var(--text-dim); }
.dc-num-inner { display: inline-block; animation: countdownFlip 5s ease-in-out infinite; }
@keyframes countdownFlip {
  0%, 10% { transform: translateY(0); opacity: 1; }
  15% { transform: translateY(-100%); opacity: 0; }
  20%, 30% { transform: translateY(100%); opacity: 0; }
  35% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(0); opacity: 1; }
}
.demo-cursor-countdown {
  animation: cursorCountdown 5s ease-in-out infinite;
}
@keyframes cursorCountdown {
  0%, 20% { left: 40px; top: 170px; opacity: 0; }
  25% { left: 80px; top: 90px; opacity: 1; }
  35%, 45% { left: 80px; top: 90px; opacity: 1; }
  50% { left: 80px; top: 90px; opacity: 1; }
  55%, 100% { left: 40px; top: 170px; opacity: 0; }
}

/* --- 2. 待办动画 --- */
.demo-todo {
  position: absolute; top: 16px; left: 50%; transform: translateX(-50%);
  width: 170px; padding: 12px;
  background: var(--card); border-radius: 12px; border: 6px solid rgba(245,235,220,.2);
}
.dt-title { font-size: 11px; font-weight: 600; margin-bottom: 8px; opacity: .7; }
.dt-item {
  display: flex; align-items: center; gap: 6px; padding: 5px 6px; font-size: 11px;
  border-radius: 6px; transition: background .2s;
}
.dt-check {
  width: 14px; height: 14px; border-radius: 4px; flex-shrink: 0;
  border: 2px solid rgba(245,235,220,.3); position: relative;
}
.dt-check::after {
  content: ''; position: absolute; top: 1px; left: 4px;
  width: 4px; height: 7px; border: solid #fff; border-width: 0 2px 2px 0;
  transform: rotate(45deg); opacity: 0;
}
/* 第1项：悬浮 → 双击 → 变绿打勾 */
.dt-item1 {
  animation: todoItemHover1 5s ease-in-out infinite;
}
.dt-item1 .dt-check { animation: todoCheck1 5s ease-in-out infinite; }
.dt-item1 .dt-check::after { animation: todoTick1 5s ease-in-out infinite; }
.dt-item1 .dt-text { animation: todoText1 5s ease-in-out infinite; }
@keyframes todoItemHover1 {
  0%, 5% { background: transparent; }
  8% { background: rgba(245,235,220,.08); }
  12%, 15% { background: rgba(245,235,220,.12); }
  20% { background: rgba(76,175,80,.15); }
  30%, 88% { background: rgba(76,175,80,.1); }
  92%, 100% { background: transparent; }
}
@keyframes todoCheck1 {
  0%, 14% { background: transparent; border-color: rgba(245,235,220,.3); }
  18% { background: #4CAF50; border-color: #4CAF50; }
  30%, 88% { background: #4CAF50; border-color: #4CAF50; }
  92%, 100% { background: transparent; border-color: rgba(245,235,220,.3); }
}
@keyframes todoTick1 {
  0%, 16% { opacity: 0; }
  20% { opacity: 1; }
  30%, 88% { opacity: 1; }
  92%, 100% { opacity: 0; }
}
@keyframes todoText1 {
  0%, 14% { text-decoration: none; opacity: 1; color: var(--text); }
  20% { text-decoration: line-through; opacity: .5; color: #4CAF50; }
  30%, 88% { text-decoration: line-through; opacity: .5; color: #4CAF50; }
  92%, 100% { text-decoration: none; opacity: 1; color: var(--text); }
}
/* 第2项 */
.dt-item2 {
  animation: todoItemHover2 5s ease-in-out infinite;
}
.dt-item2 .dt-check { animation: todoCheck2 5s ease-in-out infinite; }
.dt-item2 .dt-check::after { animation: todoTick2 5s ease-in-out infinite; }
.dt-item2 .dt-text { animation: todoText2 5s ease-in-out infinite; }
@keyframes todoItemHover2 {
  0%, 30% { background: transparent; }
  33% { background: rgba(245,235,220,.08); }
  37%, 40% { background: rgba(245,235,220,.12); }
  45% { background: rgba(76,175,80,.15); }
  55%, 88% { background: rgba(76,175,80,.1); }
  92%, 100% { background: transparent; }
}
@keyframes todoCheck2 {
  0%, 39% { background: transparent; border-color: rgba(245,235,220,.3); }
  43% { background: #4CAF50; border-color: #4CAF50; }
  55%, 88% { background: #4CAF50; border-color: #4CAF50; }
  92%, 100% { background: transparent; border-color: rgba(245,235,220,.3); }
}
@keyframes todoTick2 {
  0%, 41% { opacity: 0; }
  45% { opacity: 1; }
  55%, 88% { opacity: 1; }
  92%, 100% { opacity: 0; }
}
@keyframes todoText2 {
  0%, 39% { text-decoration: none; opacity: 1; color: var(--text); }
  45% { text-decoration: line-through; opacity: .5; color: #4CAF50; }
  55%, 88% { text-decoration: line-through; opacity: .5; color: #4CAF50; }
  92%, 100% { text-decoration: none; opacity: 1; color: var(--text); }
}
/* 第3项 */
.dt-item3 {
  animation: todoItemHover3 5s ease-in-out infinite;
}
.dt-item3 .dt-check { animation: todoCheck3 5s ease-in-out infinite; }
.dt-item3 .dt-check::after { animation: todoTick3 5s ease-in-out infinite; }
.dt-item3 .dt-text { animation: todoText3 5s ease-in-out infinite; }
@keyframes todoItemHover3 {
  0%, 55% { background: transparent; }
  58% { background: rgba(245,235,220,.08); }
  62%, 65% { background: rgba(245,235,220,.12); }
  70% { background: rgba(76,175,80,.15); }
  80%, 88% { background: rgba(76,175,80,.1); }
  92%, 100% { background: transparent; }
}
@keyframes todoCheck3 {
  0%, 64% { background: transparent; border-color: rgba(245,235,220,.3); }
  68% { background: #4CAF50; border-color: #4CAF50; }
  80%, 88% { background: #4CAF50; border-color: #4CAF50; }
  92%, 100% { background: transparent; border-color: rgba(245,235,220,.3); }
}
@keyframes todoTick3 {
  0%, 66% { opacity: 0; }
  70% { opacity: 1; }
  80%, 88% { opacity: 1; }
  92%, 100% { opacity: 0; }
}
@keyframes todoText3 {
  0%, 64% { text-decoration: none; opacity: 1; color: var(--text); }
  70% { text-decoration: line-through; opacity: .5; color: #4CAF50; }
  80%, 88% { text-decoration: line-through; opacity: .5; color: #4CAF50; }
  92%, 100% { text-decoration: none; opacity: 1; color: var(--text); }
}
/* 鼠标轨迹 */
.demo-cursor-todo { animation: cursorTodo 5s ease-in-out infinite; }
@keyframes cursorTodo {
  0% { left: 30px; top: 170px; opacity: 0; }
  5% { left: 90px; top: 52px; opacity: 1; }
  10% { left: 90px; top: 52px; opacity: 1; }
  18% { left: 90px; top: 52px; opacity: 1; }
  22%, 28% { left: 90px; top: 52px; opacity: 1; }
  32% { left: 90px; top: 74px; opacity: 1; }
  37% { left: 90px; top: 74px; opacity: 1; }
  45% { left: 90px; top: 74px; opacity: 1; }
  49%, 55% { left: 90px; top: 74px; opacity: 1; }
  59% { left: 90px; top: 96px; opacity: 1; }
  64% { left: 90px; top: 96px; opacity: 1; }
  72% { left: 90px; top: 96px; opacity: 1; }
  76%, 82% { left: 90px; top: 96px; opacity: 1; }
  88% { left: 90px; top: 96px; opacity: 0; }
  92%, 100% { left: 30px; top: 170px; opacity: 0; }
}

/* --- 5. 自由排列动画 --- */
.demo-screen-sort { background: linear-gradient(135deg, #151515, #1e1e1e); display: flex; align-items: center; justify-content: center; }
.ds-dock {
  position: relative; width: 160px; height: 170px;
}
.ds-card {
  position: absolute; left: 10px; width: 140px; height: 48px;
  background: var(--card); border-radius: 10px; border: 5px solid rgba(245,235,220,.15);
  display: flex; align-items: center; gap: 8px; padding: 0 12px;
  font-size: 11px;
}
.ds-icon { font-size: 16px; }
.ds-name { font-weight: 600; }
/* 卡片A：始终在顶部 */
.ds-card-a { top: 4px; animation: sortA 5s ease-in-out infinite; }
/* 卡片B：被拖拽的卡 */
.ds-card-b { top: 58px; animation: sortB 5s ease-in-out infinite; z-index: 5; }
/* 卡片C：向上补位 */
.ds-card-c { top: 112px; animation: sortC 5s ease-in-out infinite; }
/* 拖拽幽灵 */
.ds-ghost {
  position: absolute; left: 10px; width: 140px; height: 48px;
  background: rgba(255,107,63,.15); border: 2px dashed rgba(255,107,63,.4);
  border-radius: 10px; opacity: 0;
  animation: sortGhost 5s ease-in-out infinite;
}
@keyframes sortA {
  0%, 100% { top: 4px; }
}
@keyframes sortB {
  0%, 15% { top: 58px; left: 10px; transform: scale(1); box-shadow: none; }
  20% { top: 58px; left: 10px; transform: scale(1.04); box-shadow: 0 4px 16px rgba(0,0,0,.4); }
  35% { top: 58px; left: 20px; transform: scale(1.04); box-shadow: 0 4px 16px rgba(0,0,0,.4); }
  55% { top: 130px; left: 20px; transform: scale(1.04); box-shadow: 0 4px 16px rgba(0,0,0,.4); }
  65% { top: 112px; left: 10px; transform: scale(1); box-shadow: none; }
  100% { top: 112px; left: 10px; }
}
@keyframes sortC {
  0%, 35% { top: 112px; }
  55%, 100% { top: 58px; }
}
@keyframes sortGhost {
  0%, 55% { top: 112px; opacity: 0; }
  60% { top: 112px; opacity: 1; }
  68%, 100% { top: 112px; opacity: 0; }
}
.demo-cursor-sort { animation: cursorSort 5s ease-in-out infinite; }
@keyframes cursorSort {
  0%, 10% { left: 30px; top: 150px; opacity: 0; }
  15% { left: 80px; top: 72px; opacity: 1; }
  20% { left: 80px; top: 72px; opacity: 1; }
  22% { left: 80px; top: 72px; opacity: 1; }
  35% { left: 90px; top: 72px; opacity: 1; }
  55% { left: 90px; top: 145px; opacity: 1; }
  62%, 68% { left: 90px; top: 145px; opacity: 1; }
  75%, 100% { left: 30px; top: 150px; opacity: 0; }
}

/* --- 6. 多端同步动画（9秒单次循环）--- */
.demo-screen-sync { position: relative; overflow: hidden; }

/* 居中容器 */
.ds-stage {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
}
.ds-stage > * { position: absolute; }

/* SVG 虚线（底层） */
.ds-lines {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  z-index: 1;
}

/* 信号点：单次飞行，飞完消失 */
.ds-dot {
  position: absolute; width: 6px; height: 6px;
  border-radius: 50%; background: #4CAF50;
  z-index: 3; opacity: 0;
  transform: translate(-50%, -50%);
}
/* 手机(22%,50%) → 云(50%,28%) */
.ds-dot1 { left: 22%; top: 50%; animation: dotFly1 9s ease-out 1s infinite; }
@keyframes dotFly1 {
  0% { left: 22%; top: 50%; opacity: 1; }
  12% { left: 50%; top: 28%; opacity: 0; }
  100% { left: 50%; top: 28%; opacity: 0; }
}
/* 云(50%,28%) → 电脑(78%,22%) */
.ds-dot2 { left: 50%; top: 28%; animation: dotFly2 9s ease-out 4.2s infinite; }
@keyframes dotFly2 {
  0% { left: 50%; top: 28%; opacity: 1; }
  10% { left: 78%; top: 22%; opacity: 0; }
  100% { left: 78%; top: 22%; opacity: 0; }
}
/* 云(50%,28%) → 平板(76%,68%) */
.ds-dot3 { left: 50%; top: 28%; animation: dotFly3 9s ease-out 4.5s infinite; }
@keyframes dotFly3 {
  0% { left: 50%; top: 28%; opacity: 1; }
  10% { left: 76%; top: 68%; opacity: 0; }
  100% { left: 76%; top: 68%; opacity: 0; }
}

/* 云：实心背景，盖住信号线 */
.ds-cloud {
  position: absolute; left: 38%; top: 10%;
  width: 26%; height: 30%;
  z-index: 4;
  animation: cloudFlash 9s ease infinite;
}
.ds-cloud svg { width: 100%; height: 100%; }

/* 云闪两下（绿色） */
@keyframes cloudFlash {
  0%, 22% { filter: drop-shadow(0 0 0 transparent); }
  26% { filter: drop-shadow(0 0 8px rgba(76,175,80,.7)); }
  31% { filter: drop-shadow(0 0 0 transparent); }
  35% { filter: drop-shadow(0 0 8px rgba(76,175,80,.7)); }
  42%, 100% { filter: drop-shadow(0 0 0 transparent); }
}

/* 设备 */
.ds-device {
  position: absolute; z-index: 5;
  background: var(--card); border-radius: 6px;
  border: 4px solid rgba(245,235,220,.15);
  display: flex; align-items: center; justify-content: center;
}
.ds-chk {
  font-size: 16px; font-weight: 900; color: #4CAF50;
  opacity: 0; transform: scale(0);
}

/* 手机：左中偏右 */
.ds-phone { left: 10%; top: 34%; width: 20%; height: 32%; border-radius: 5px; }
.ds-phone .ds-chk { font-size: 14px; animation: chkPhone 9s ease infinite; }

/* 电脑：右上 */
.ds-pc { left: 64%; top: 8%; width: 30%; height: 28%; border-radius: 4px; }
.ds-pc .ds-chk { animation: chkPc 9s ease infinite; }

/* 平板：右下 */
.ds-pad { left: 62%; top: 48%; width: 24%; height: 38%; border-radius: 4px; }
.ds-pad .ds-chk { font-size: 14px; animation: chkPad 9s ease infinite; }

@keyframes chkPhone {
  0%, 2% { opacity: 0; transform: scale(0); }
  5% { opacity: 1; transform: scale(1.3); }
  8%, 88% { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(0); }
}
@keyframes chkPc {
  0%, 58% { opacity: 0; transform: scale(0); }
  62% { opacity: 1; transform: scale(1.3); }
  68%, 88% { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(0); }
}
@keyframes chkPad {
  0%, 62% { opacity: 0; transform: scale(0); }
  66% { opacity: 1; transform: scale(1.3); }
  72%, 88% { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(0); }
}

/* --- 3. 桌面吸附动画 --- */
.demo-screen-dock { background: linear-gradient(135deg, #111, #1a1a1a); }
.demo-edge-indicator {
  position: absolute; right: 0; top: 0; bottom: 0; width: 4px;
  background: var(--accent); opacity: 0;
  animation: edgeGlow 5s ease-in-out infinite;
}
@keyframes edgeGlow {
  0%, 30% { opacity: 0; }
  40%, 55% { opacity: .8; }
  65%, 100% { opacity: 0; }
}
.demo-dock-card {
  position: absolute; top: 20px; left: 50px; width: 100px; height: 100px;
  padding: 12px;
  background: var(--card); border-radius: 12px; border: 6px solid rgba(245,235,220,.2);
  text-align: center; overflow: hidden;
  animation: dockSlide 5s ease-in-out infinite;
}
.dd-label { font-size: 10px; color: var(--text-dim); }
.dd-num { font-size: 28px; font-weight: 900; }
/* 吸附后出现的额外卡片 */
.demo-dock-extra {
  position: absolute; right: 6px; width: 78px;
  background: var(--card); border: 6px solid rgba(245,235,220,.15);
  border-radius: 12px 0 0 12px; padding: 10px; text-align: center;
  opacity: 0; overflow: hidden;
}
.demo-dock-extra .de-title { font-size: 9px; color: var(--text-dim); margin-bottom: 4px; }
.demo-dock-extra .de-text { font-size: 9px; }
.demo-dock-extra2 { top: 6px; height: 85px; animation: extraFadeIn 5s ease-in-out infinite; }
.demo-dock-extra3 { top: 97px; height: 95px; animation: extraFadeIn2 5s ease-in-out infinite; }
@keyframes extraFadeIn {
  0%, 58% { opacity: 0; }
  65%, 100% { opacity: 1; }
}
@keyframes extraFadeIn2 {
  0%, 62% { opacity: 0; }
  70%, 100% { opacity: 1; }
}
@keyframes dockSlide {
  0%, 10% { left: 50px; top: 20px; width: 100px; height: 100px; border-radius: 12px; right: auto; }
  35% { left: 50px; top: 20px; width: 100px; height: 100px; border-radius: 12px; right: auto; }
  55% { left: auto; right: 6px; top: 6px; width: 78px; height: 186px; border-radius: 12px 0 0 12px; }
  80%, 100% { left: auto; right: 6px; top: 6px; width: 78px; height: 186px; border-radius: 12px 0 0 12px; }
}
.demo-cursor-dock { animation: cursorDock 5s ease-in-out infinite; }
@keyframes cursorDock {
  0%, 5% { left: 30px; top: 170px; opacity: 0; }
  10% { left: 70px; top: 50px; opacity: 1; }
  30% { left: 70px; top: 50px; opacity: 1; }
  50% { left: 185px; top: 50px; opacity: 1; }
  55%, 100% { left: 185px; top: 50px; opacity: 0; }
}

/* --- 4. 强提醒动画 --- */
.demo-reminder-flash {
  position: absolute; inset: 0;
  background: rgba(255,107,63,0);
  animation: reminderFlashAnim 5s ease-in-out infinite;
}
@keyframes reminderFlashAnim {
  0%, 50% { background: rgba(255,107,63,0); }
  55% { background: rgba(255,107,63,.15); }
  60% { background: rgba(255,107,63,0); }
  65% { background: rgba(255,107,63,.15); }
  70% { background: rgba(255,107,63,0); }
  75% { background: rgba(255,107,63,.1); }
  85%, 100% { background: rgba(255,107,63,0); }
}
.demo-reminder-popup {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%) scale(0);
  background: var(--card); border-radius: 16px; border: 6px solid rgba(255,107,63,.4);
  padding: 24px 32px; text-align: center;
  box-shadow: 0 8px 30px rgba(255,107,63,.2);
  animation: reminderPop 5s ease-in-out infinite;
}
@keyframes reminderPop {
  0%, 48% { transform: translate(-50%, -50%) scale(0); opacity: 0; }
  55% { transform: translate(-50%, -50%) scale(1.05); opacity: 1; }
  60% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  85% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  92%, 100% { transform: translate(-50%, -50%) scale(0); opacity: 0; }
}
.dr-icon { font-size: 28px; margin-bottom: 6px; }
.dr-text { font-size: 18px; font-weight: 700; }
.dr-time { font-size: 12px; color: var(--accent); margin-top: 4px; }

/* ===== 截图 ===== */
.screenshots { padding: 80px 24px; background: var(--bg2); }
.shot-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.shot-card {
  background: var(--card); border-radius: var(--radius);
  overflow: hidden; border: 1px solid var(--border);
}
.shot-placeholder {
  height: 200px; display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: var(--text-dim);
  background: linear-gradient(135deg, rgba(255,107,63,.1), rgba(245,235,220,.05));
}
.shot-card p { padding: 16px; font-size: 13px; color: var(--text-dim); }

/* ===== 下载 ===== */
.download { padding: 80px 24px; }
.download-desc { text-align: center; color: var(--text-dim); margin-top: -24px; margin-bottom: 40px; }
.download-grid {
  display: flex; justify-content: center; gap: 24px; flex-wrap: wrap;
}
.download-card {
  background: var(--card); border-radius: var(--radius);
  padding: 32px 28px; text-align: center;
  border: 1px solid var(--border);
  min-width: 220px;
}
.download-icon { margin-bottom: 16px; color: var(--accent); }
.download-card h3 { font-size: 18px; margin-bottom: 8px; }
.download-ver { font-size: 12px; color: var(--text-dim); }
.download-req { font-size: 11px; color: var(--text-dim); opacity: .6; margin-bottom: 16px; }

/* ===== 页脚 ===== */
.footer {
  padding: 24px; border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1100px; margin: 0 auto;
  text-align: center; font-size: 12px; color: var(--text-dim);
}

/* ===== 淡入动画 ===== */
.fade-in {
  opacity: 0; transform: translateY(20px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .feature-grid .demo-card { flex: 0 0 calc(33.333% - 11px); max-width: calc(33.333% - 11px); }
  .hero-screen { max-width: 95vw; }
  .hero-left { padding: 0 28px; width: calc(100% - 160px); }
  .hero-left h1 { font-size: 40px; }
}
@media (max-width: 768px) {
  .hero-screen { aspect-ratio: auto; height: auto; min-height: 480px; }
  .hero-left { position: relative; width: 100%; bottom: auto; padding: 60px 24px 20px; text-align: center; }
  .hero-btns { justify-content: center; }
  .mock-dock-app { position: relative; width: 100%; bottom: auto; border-left: none; border-top: 6px solid rgba(245,235,220,.2); flex-direction: row; flex-wrap: wrap; justify-content: center; padding: 12px; }
  .mock-dock-card { width: 140px; }
  .mock-dock-bar { width: 100%; }
  .mock-taskbar { position: relative; }
  .feature-grid .demo-card { flex: 0 0 calc(50% - 8px); max-width: calc(50% - 8px); }
  h2 { font-size: 24px; }
  .nav-links { gap: 16px; }
}