/* ==========================================================================
   词元跳动官网样式 — 深色科技风 + 玻璃拟态（清爽蓝色品牌）
   ========================================================================== */

/* 设计令牌 — 清爽蓝色品牌主题（Blue） */
:root {
  /* 背景：冷调深蓝黑，与蓝色品牌协调 */
  --bg-base: #0B0F1A;
  --bg-deep: #070A12;
  --bg-elev: #131826;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.06);

  /* 边框（提高对比度：卡片在深色底上更清晰可辨） */
  --border-soft: rgba(255, 255, 255, 0.12);
  --border-strong: rgba(255, 255, 255, 0.22);

  /* 主色（清爽蓝色体系） */
  --c-blue: #2970FF;     /* 主品牌：蓝 */
  --c-purple: #6172F3;   /* 次要：靛蓝 */
  --c-cyan: #0BA5EC;     /* 强调：天蓝 */
  --c-pink: #53B1FD;
  --grad-primary: linear-gradient(135deg, #155EEF 0%, #6172F3 100%);
  --grad-vivid: linear-gradient(135deg, #0BA5EC 0%, #2970FF 50%, #004EEB 100%);
  --grad-soft: linear-gradient(180deg, rgba(21, 94, 239, 0.10) 0%, rgba(97, 114, 243, 0.04) 100%);

  /* 文字 */
  --t-primary: #F0F4FA;
  --t-secondary: #AEB7C5;
  --t-tertiary: #8A93A6;

  /* 尺寸 */
  --container: 1200px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 阴影 */
  --shadow-glow: 0 0 40px rgba(21, 94, 239, 0.30);
  --shadow-glow-purple: 0 0 50px rgba(97, 114, 243, 0.30);
  --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.45);
}

/* 重置 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  background: var(--bg-base);
  color: var(--t-primary);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

/* 全局背景层 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(21, 94, 239, 0.18) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(97, 114, 243, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(11, 165, 236, 0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

main, .nav, .footer {
  position: relative;
  z-index: 1;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

/* 通用容器 */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* 渐变文字 */
.gradient-text {
  background: var(--grad-vivid);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* 隐藏类 */
.hide-sm {
  display: inline;
}

/* ==========================================================================
   按钮
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.2px;
  transition: all 0.25s ease;
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-lg {
  padding: 14px 26px;
  font-size: 15px;
  border-radius: var(--radius-md);
}

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: 0 6px 20px rgba(21, 94, 239, 0.35);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #2970ff 0%, #84adff 100%);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.btn-primary > * {
  position: relative;
  z-index: 1;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(21, 94, 239, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: var(--t-primary);
  border-color: var(--border-soft);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

/* ==========================================================================
   导航栏
   ========================================================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: all 0.3s ease;
  background: transparent;
}

.nav.scrolled {
  background: rgba(11, 15, 26, 0.72);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-soft);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.5px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
}

/* 小牛 Logo 眨眼动画：默认右眼椭圆显示，眨眼时切换为箭头 */
.calf-logo .calf-eye-wink {
  display: none;
}
.calf-logo.is-winking .calf-eye-open {
  display: none;
}
.calf-logo.is-winking .calf-eye-wink {
  display: inline;
}

.nav-links {
  display: flex;
  gap: 36px;
  font-size: 14px;
  color: var(--t-secondary);
}

.nav-links a {
  position: relative;
  padding: 4px 0;
}

.nav-links a:hover {
  color: var(--t-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  gap: 10px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 8px;
  border-radius: 8px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--t-primary);
  border-radius: 2px;
  transition: all 0.25s ease;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 12px 24px 24px;
  background: rgba(11, 15, 26, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-soft);
}

.nav-mobile a {
  padding: 14px 0;
  border-bottom: 1px solid var(--border-soft);
  color: var(--t-secondary);
  font-size: 15px;
}

.nav-mobile a:last-of-type {
  border-bottom: none;
}

.nav-mobile.show {
  display: flex;
}

.nav-mobile-actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

.nav-mobile-actions .btn {
  flex: 1;
}

/* ==========================================================================
   Hero 主视觉
   ========================================================================== */
.hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.6;
  animation: orbFloat 20s ease-in-out infinite;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(21, 94, 239, 0.55), transparent 70%);
  top: -10%;
  left: -10%;
  animation-delay: 0s;
}

.orb-2 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(97, 114, 243, 0.45), transparent 70%);
  top: 20%;
  right: -15%;
  animation-delay: -7s;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(11, 165, 236, 0.30), transparent 70%);
  bottom: -10%;
  left: 30%;
  animation-delay: -14s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -30px) scale(1.05); }
  66% { transform: translate(-30px, 40px) scale(0.95); }
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(21, 94, 239, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(21, 94, 239, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

.hero-inner {
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px 7px 12px;
  border-radius: 100px;
  background: rgba(21, 94, 239, 0.10);
  border: 1px solid rgba(21, 94, 239, 0.25);
  font-size: 13px;
  color: var(--t-secondary);
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ADE80;
  box-shadow: 0 0 10px rgba(74, 222, 128, 0.7);
  animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}

.hero-title {
  font-size: clamp(36px, 6vw, 68px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--t-secondary);
  max-width: 720px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

/* ============================================================
   Hero 中央 3D 机器人舞台（CSS 3D 透视 + 鼠标视差）
   ============================================================ */
.hero-stage {
  position: relative;
  width: 100%;
  max-width: 720px;
  height: 540px;
  margin: 24px auto 56px;
  perspective: 1400px;
  perspective-origin: 50% 45%;
  transform-style: preserve-3d;
  --mx: 0;
  --my: 0;
}

/* 机器人 3D 舞台容器 */
.robot-figure {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

/* 背后柔光晕 */
.robot-glow {
  position: absolute;
  width: 75%;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(21, 94, 239, 0.55) 0%, rgba(97, 114, 243, 0.20) 32%, transparent 68%);
  filter: blur(50px);
  z-index: 0;
  animation: glowPulse 4.5s ease-in-out infinite;
  pointer-events: none;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.10); }
}

/* 3D 画布 */
.robot-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  cursor: pointer;
}

.robot-canvas canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

/* WebGL 不可用时的兜底图 */
.robot-fallback {
  position: relative;
  z-index: 1;
  width: 80%;
  max-width: 460px;
  height: auto;
  user-select: none;
  -webkit-user-drag: none;
  filter: drop-shadow(0 30px 40px rgba(0, 0, 0, 0.5));
}

/* hidden 属性必须强制隐藏（覆盖全局 img { display: block }） */
.robot-fallback[hidden] {
  display: none;
}

/* 对话气泡 */
.robot-bubble {
  position: absolute;
  top: 12%;
  left: 50%;
  transform: translate(-50%, -10px) scale(0.92);
  padding: 12px 20px;
  background: linear-gradient(180deg, rgba(22, 28, 42, 0.95), rgba(11, 15, 26, 0.95));
  border: 1px solid rgba(21, 94, 239, 0.40);
  border-radius: 18px;
  color: var(--t-primary);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow:
    0 12px 36px rgba(0, 0, 0, 0.5),
    0 0 24px rgba(21, 94, 239, 0.30);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.35s;
  pointer-events: none;
  z-index: 5;
}

.robot-bubble.show {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0) scale(1);
}

/* 气泡尾巴 */
.robot-bubble::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 14px;
  height: 14px;
  background: linear-gradient(135deg, transparent 50%, rgba(11, 15, 26, 0.95) 50%);
  border-right: 1px solid rgba(21, 94, 239, 0.40);
  border-bottom: 1px solid rgba(21, 94, 239, 0.40);
}

/* 浮动信息卡片 — 不同 Z 层 + 反向视差，强化纵深 */
.stage-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(19, 24, 38, 0.85);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
  white-space: nowrap;
  font-size: 13px;
  z-index: 4;
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

.stage-card strong {
  display: block;
  color: var(--t-primary);
  font-weight: 700;
  font-size: 14px;
}

.stage-card em {
  font-style: normal;
  display: block;
  color: var(--t-tertiary);
  font-size: 12px;
}

.stage-card-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(21, 94, 239, 0.12);
  border: 1px solid rgba(21, 94, 239, 0.30);
  color: var(--c-blue);
  flex-shrink: 0;
}

.stage-card-icon.icon-warm {
  background: rgba(97, 114, 243, 0.12);
  border-color: rgba(97, 114, 243, 0.30);
  color: #84adff;
}

.stage-card-icon.icon-gold {
  background: rgba(11, 165, 236, 0.10);
  border-color: rgba(11, 165, 236, 0.30);
  color: #7cd4fd;
}

/* 卡片位置 + 不同 Z 深度（每张错开 30~80px 让纵深更明显） */
.stage-card-1 {
  top: 18%; left: -2%;
  transform: translate3d(calc(var(--mx, 0) * -22px), calc(var(--my, 0) * -10px), 60px);
  animation: floatY1 6s ease-in-out infinite;
}
.stage-card-2 {
  bottom: 22%; left: 2%;
  transform: translate3d(calc(var(--mx, 0) * -28px), calc(var(--my, 0) * -8px), 90px);
  animation: floatY2 7s ease-in-out infinite;
}
.stage-card-3 {
  top: 16%; right: -2%;
  transform: translate3d(calc(var(--mx, 0) * 24px), calc(var(--my, 0) * -10px), 50px);
  animation: floatY1 6.5s ease-in-out infinite reverse;
}
.stage-card-4 {
  bottom: 26%; right: 1%;
  transform: translate3d(calc(var(--mx, 0) * 30px), calc(var(--my, 0) * -8px), 110px);
  animation: floatY2 7.5s ease-in-out infinite reverse;
}

/* 用 translate（独立属性）做 Y 漂浮，不与 transform 冲突 */
@keyframes floatY1 {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -10px; }
}
@keyframes floatY2 {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -14px; }
}

/* 小圆形脉冲胶囊 */
.stage-pulse {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(19, 24, 38, 0.80);
  border: 1px solid var(--border-strong);
  border-radius: 100px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 12px;
  color: var(--t-secondary);
  animation: cardFloat 5s ease-in-out infinite;
  z-index: 3;
}

.stage-pulse-1 {
  top: 50%;
  left: 6%;
  animation-delay: -1.5s;
}

.stage-pulse-2 {
  bottom: 30%;
  right: 8%;
  animation-delay: -3.5s;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ADE80;
  box-shadow: 0 0 8px rgba(74, 222, 128, 0.7);
  animation: dotPulse 1.6s ease-in-out infinite;
}

/* 提示信息 */
.robot-tip {
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 100px;
  background: rgba(21, 94, 239, 0.10);
  border: 1px solid rgba(21, 94, 239, 0.28);
  color: var(--c-blue);
  font-size: 12px;
  font-weight: 500;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  pointer-events: none;
  animation: tipBlink 3s ease-in-out infinite;
}

@keyframes tipBlink {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}

.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  padding: 18px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.hero-meta-item strong {
  font-size: 22px;
  font-weight: 700;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-meta-item span {
  font-size: 12px;
  color: var(--t-tertiary);
}

.hero-meta-divider {
  width: 1px;
  height: 28px;
  background: var(--border-soft);
}

/* ==========================================================================
   通用区块
   ========================================================================== */
.section {
  padding: 120px 0;
  position: relative;
}

.section-alt {
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.015) 50%, transparent);
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}

.eyebrow {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 100px;
  background: rgba(21, 94, 239, 0.10);
  border: 1px solid rgba(21, 94, 239, 0.25);
  color: var(--c-blue);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.section-title {
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--t-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   核心特性卡片
   ========================================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  position: relative;
  padding: 36px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all 0.3s ease;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(21, 94, 239, 0.6), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.icon-blue {
  background: rgba(21, 94, 239, 0.12);
  color: #2970ff;
  border: 1px solid rgba(21, 94, 239, 0.30);
}

.icon-purple {
  background: rgba(97, 114, 243, 0.12);
  color: #84adff;
  border: 1px solid rgba(97, 114, 243, 0.30);
}

.icon-cyan {
  background: rgba(11, 165, 236, 0.10);
  color: #7cd4fd;
  border: 1px solid rgba(11, 165, 236, 0.30);
}

.feature-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.2px;
}

.feature-card > p {
  color: var(--t-secondary);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 18px;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px dashed var(--border-soft);
}

.feature-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--t-secondary);
}

.feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--grad-primary);
  opacity: 0.85;
}

.feature-list li::after {
  content: '';
  position: absolute;
  left: 3px;
  top: 11px;
  width: 6px;
  height: 3px;
  border-left: 1.5px solid #fff;
  border-bottom: 1.5px solid #fff;
  transform: rotate(-45deg);
}

/* ==========================================================================
   产品能力矩阵
   ========================================================================== */
.cap-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 120px;
}

.cap-row:last-child {
  margin-bottom: 0;
}

.cap-row-reverse .cap-text {
  order: 2;
}

.cap-tag {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 100px;
  background: rgba(97, 114, 243, 0.12);
  border: 1px solid rgba(97, 114, 243, 0.30);
  color: #84adff;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
}

.cap-text h3 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.4px;
  margin-bottom: 16px;
}

.cap-text > p {
  font-size: 16px;
  color: var(--t-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
}

.cap-points {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cap-points li {
  position: relative;
  padding-left: 28px;
  color: var(--t-secondary);
  font-size: 15px;
}

.cap-points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--grad-primary);
  opacity: 0.85;
}

.cap-points li::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 10px;
  width: 8px;
  height: 4px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg);
}

/* 模拟界面卡片 */
.cap-mock {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0.02) 100%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: var(--shadow-card);
  transition: transform 0.4s ease;
}

.cap-row:hover .cap-mock {
  transform: translateY(-4px);
}

.mock-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-soft);
}

.mock-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
}

.mock-dot:nth-child(1) { background: rgba(255, 95, 86, 0.6); }
.mock-dot:nth-child(2) { background: rgba(255, 189, 46, 0.6); }
.mock-dot:nth-child(3) { background: rgba(40, 200, 64, 0.6); }

.mock-title {
  margin-left: 12px;
  font-size: 13px;
  color: var(--t-tertiary);
  font-weight: 500;
}

.mock-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* 员工花名册行 */
.emp-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  transition: all 0.25s ease;
}

.emp-row:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-strong);
}

.emp-row strong {
  display: block;
  font-size: 14px;
  margin-bottom: 2px;
}

.emp-row em {
  font-style: normal;
  font-size: 12px;
  color: var(--t-tertiary);
}

.emp-row-pending {
  opacity: 0.65;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.avatar-blue { background: linear-gradient(135deg, #155eef, #004eeb); }
.avatar-purple { background: linear-gradient(135deg, #6172f3, #004eeb); }
.avatar-cyan { background: linear-gradient(135deg, #6172f3, #0ba5ec); }
.avatar-gray { background: linear-gradient(135deg, #6B7388, #4A5266); }

/* 工作流节点 */
.mock-flow {
  align-items: center;
  padding: 28px 20px;
}

.flow-node {
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-soft);
  text-align: center;
  min-width: 120px;
}

.node-start {
  background: rgba(74, 222, 128, 0.12);
  border-color: rgba(74, 222, 128, 0.35);
  color: #7BE9A2;
}

.node-skill {
  background: rgba(21, 94, 239, 0.12);
  border-color: rgba(21, 94, 239, 0.35);
  color: #84adff;
}

.node-end {
  background: rgba(97, 114, 243, 0.12);
  border-color: rgba(97, 114, 243, 0.35);
  color: #7cd4fd;
}

.flow-arrow {
  width: 2px;
  height: 18px;
  background: linear-gradient(180deg, var(--c-blue), var(--c-purple));
  position: relative;
}

.flow-arrow::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 6px;
  height: 6px;
  border-right: 2px solid var(--c-purple);
  border-bottom: 2px solid var(--c-purple);
}

.flow-branch {
  display: flex;
  gap: 14px;
}

/* 任务行 */
.task-row {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
}

.task-time {
  font-size: 12px;
  color: var(--t-tertiary);
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

.task-name {
  font-size: 14px;
  font-weight: 500;
}

.task-state {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 6px;
  font-weight: 500;
}

.task-state-ok {
  background: rgba(74, 222, 128, 0.12);
  color: #7BE9A2;
  border: 1px solid rgba(74, 222, 128, 0.30);
}

.task-state-wait {
  background: rgba(255, 189, 46, 0.10);
  color: #FFD46B;
  border: 1px solid rgba(255, 189, 46, 0.28);
}

/* 预算行 */
.budget-row {
  display: grid;
  grid-template-columns: 70px 1fr 130px;
  align-items: center;
  gap: 14px;
  padding: 10px 4px;
}

.budget-name {
  font-size: 13px;
  color: var(--t-secondary);
}

.budget-bar {
  height: 8px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 100px;
  overflow: hidden;
}

.budget-fill {
  height: 100%;
  background: var(--grad-primary);
  border-radius: 100px;
  transition: width 1s ease;
}

.budget-fill-warn {
  background: linear-gradient(90deg, #FFB144, #FF6B6B);
}

.budget-num {
  font-size: 12px;
  color: var(--t-tertiary);
  font-family: 'SFMono-Regular', Consolas, monospace;
  text-align: right;
}

/* 通知行 */
.notif-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
}

.notif-row strong {
  display: block;
  font-size: 14px;
  margin-bottom: 2px;
}

.notif-row em {
  font-style: normal;
  font-size: 12px;
  color: var(--t-tertiary);
}

.notif-pin {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.notif-pin-error { background: #FF6B6B; box-shadow: 0 0 8px rgba(255, 107, 107, 0.6); }
.notif-pin-info { background: #155eef; box-shadow: 0 0 8px rgba(21, 94, 239, 0.6); }
.notif-pin-success { background: #4ADE80; box-shadow: 0 0 8px rgba(74, 222, 128, 0.6); }

.notif-time {
  font-size: 11px;
  color: var(--t-tertiary);
}

/* ==========================================================================
   应用场景
   ========================================================================== */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.scenario-card {
  position: relative;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all 0.3s ease;
  overflow: hidden;
}

.scenario-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(21, 94, 239, 0.15), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.scenario-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
}

.scenario-card:hover::after {
  opacity: 1;
}

.scenario-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: var(--grad-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  margin-bottom: 18px;
  box-shadow: 0 6px 20px rgba(21, 94, 239, 0.30);
}

.scenario-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.scenario-card > p {
  font-size: 14px;
  color: var(--t-secondary);
  line-height: 1.7;
  margin-bottom: 18px;
}

.scenario-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.scenario-tags span {
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-soft);
  font-size: 12px;
  color: var(--t-secondary);
}

/* ==========================================================================
   技术优势
   ========================================================================== */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.adv-item {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all 0.3s ease;
}

.adv-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-3px);
}

.adv-icon {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.adv-item h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.adv-item p {
  font-size: 14px;
  color: var(--t-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   关于我们
   ========================================================================== */
.about-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-text .eyebrow {
  margin-bottom: 18px;
}

.about-text > p {
  font-size: 16px;
  color: var(--t-secondary);
  line-height: 1.85;
  margin: 22px 0 36px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.about-stats > div {
  padding: 20px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
}

.about-stats strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 4px;
}

.about-stats span {
  font-size: 13px;
  color: var(--t-tertiary);
}

.about-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 480px;
  margin: 0 auto;
}

.about-orb {
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, rgba(21, 94, 239, 0.7) 0%, rgba(97, 114, 243, 0.5) 40%, transparent 75%);
  filter: blur(20px);
  animation: orbFloat 12s ease-in-out infinite;
}

.about-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  background: rgba(19, 24, 38, 0.85);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  font-size: 13px;
  color: var(--t-secondary);
  white-space: nowrap;
  box-shadow: var(--shadow-card);
  animation: cardFloat 6s ease-in-out infinite;
}

.about-card strong {
  color: var(--t-primary);
  font-weight: 700;
  font-size: 15px;
  margin-left: 4px;
}

.about-card-1 { top: 8%; left: -8%; animation-delay: 0s; }
.about-card-2 { top: 45%; right: -10%; animation-delay: -2s; }
.about-card-3 { bottom: 12%; left: 6%; animation-delay: -4s; }

@keyframes cardFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.ac-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-blue);
  box-shadow: 0 0 10px var(--c-blue);
}

.ac-dot-purple { background: var(--c-purple); box-shadow: 0 0 10px var(--c-purple); }
.ac-dot-cyan { background: var(--c-cyan); box-shadow: 0 0 10px var(--c-cyan); }

/* ==========================================================================
   行动召唤
   ========================================================================== */
.cta-section {
  padding: 60px 0 120px;
}

.cta-card {
  position: relative;
  padding: 64px 40px;
  text-align: center;
  background:
    linear-gradient(135deg, rgba(21, 94, 239, 0.10) 0%, rgba(97, 114, 243, 0.10) 100%),
    rgba(19, 24, 38, 0.6);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  overflow: hidden;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

.cta-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(21, 94, 239, 0.30), transparent 60%);
  filter: blur(60px);
  pointer-events: none;
}

.cta-card::after {
  content: '';
  position: absolute;
  bottom: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(97, 114, 243, 0.30), transparent 60%);
  filter: blur(60px);
  pointer-events: none;
}

.cta-card > * {
  position: relative;
}

.cta-card h2 {
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.4px;
}

.cta-card p {
  color: var(--t-secondary);
  font-size: 16px;
  margin-bottom: 32px;
}

.cta-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border-soft);
  padding: 64px 0 24px;
  background: rgba(7, 10, 20, 0.5);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 60px;
  margin-bottom: 48px;
}

.footer-brand p {
  margin-top: 16px;
  font-size: 14px;
  color: var(--t-tertiary);
  line-height: 1.7;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--t-primary);
}

.footer-col a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--t-tertiary);
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--t-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-soft);
  font-size: 13px;
  color: var(--t-tertiary);
}

/* ==========================================================================
   页脚 ICP 备案号链接
   ========================================================================== */
.footer-icp {
  color: var(--t-tertiary);
  transition: color 0.2s ease;
}

.footer-icp:hover {
  color: var(--t-secondary);
}

/* ==========================================================================
   联系电话弹窗
   ========================================================================== */
.contact-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.contact-modal.show {
  opacity: 1;
  visibility: visible;
}

.contact-mask {
  position: absolute;
  inset: 0;
  background: rgba(7, 10, 18, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  cursor: pointer;
}

.contact-panel {
  position: relative;
  width: calc(100% - 40px);
  max-width: 440px;
  padding: 48px 36px 36px;
  text-align: center;
  background: linear-gradient(180deg, rgba(22, 28, 42, 0.98) 0%, rgba(19, 24, 38, 0.98) 100%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset,
    var(--shadow-glow);
  transform: translateY(20px) scale(0.96);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.contact-modal.show .contact-panel {
  transform: translateY(0) scale(1);
}

.contact-panel::before {
  content: '';
  position: absolute;
  top: -100px;
  left: -50px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(21, 94, 239, 0.30), transparent 60%);
  filter: blur(40px);
  pointer-events: none;
}

.contact-panel::after {
  content: '';
  position: absolute;
  bottom: -100px;
  right: -50px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(97, 114, 243, 0.30), transparent 60%);
  filter: blur(40px);
  pointer-events: none;
}

.contact-panel > * {
  position: relative;
}

.contact-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--t-tertiary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-soft);
  transition: all 0.2s ease;
}

.contact-close:hover {
  color: var(--t-primary);
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-strong);
}

.contact-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 18px;
  background: var(--grad-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 12px 32px rgba(21, 94, 239, 0.40);
}

.contact-panel h3 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.contact-desc {
  font-size: 14px;
  color: var(--t-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
}

.contact-phones {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: stretch;
  margin-bottom: 16px;
}

.contact-phone {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  background: rgba(21, 94, 239, 0.10);
  border: 1px solid rgba(21, 94, 239, 0.35);
  color: var(--t-primary);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 1px;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  transition: all 0.25s ease;
}

.contact-phone:hover {
  background: rgba(21, 94, 239, 0.18);
  border-color: rgba(21, 94, 239, 0.55);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(21, 94, 239, 0.30);
}

.contact-phone svg {
  color: var(--c-blue);
}

.contact-hint {
  font-size: 12px;
  color: var(--t-tertiary);
  margin: 0;
}

/* 弹窗打开时禁止页面滚动 */
body.modal-open {
  overflow: hidden;
}

@media (max-width: 480px) {
  .contact-panel {
    padding: 40px 24px 28px;
  }
  .contact-phone {
    font-size: 17px;
    padding: 12px 18px;
  }
}

/* ==========================================================================
   滚动渐入动画
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  will-change: opacity, transform;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* 错峰渐入 */
.feature-grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.feature-grid .reveal:nth-child(3) { transition-delay: 0.16s; }
.scenario-grid .reveal:nth-child(2) { transition-delay: 0.06s; }
.scenario-grid .reveal:nth-child(3) { transition-delay: 0.12s; }
.scenario-grid .reveal:nth-child(4) { transition-delay: 0.18s; }
.adv-grid .reveal:nth-child(2) { transition-delay: 0.05s; }
.adv-grid .reveal:nth-child(3) { transition-delay: 0.10s; }
.adv-grid .reveal:nth-child(4) { transition-delay: 0.15s; }
.adv-grid .reveal:nth-child(5) { transition-delay: 0.20s; }
.adv-grid .reveal:nth-child(6) { transition-delay: 0.25s; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1024px) {
  .nav-links { gap: 24px; }
  .feature-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .cap-row { gap: 48px; }
  .hero-stage { height: 460px; max-width: 600px; }
  .stage-card-1, .stage-card-3 { display: none; }
}

@media (max-width: 768px) {
  html { scroll-padding-top: 64px; }

  .nav-inner { height: 64px; }
  .nav-links, .nav-actions { display: none; }
  .nav-toggle { display: flex; }

  .container { padding: 0 20px; }

  .hide-sm { display: none; }

  .hero {
    padding: 120px 0 80px;
  }

  .hero-badge { font-size: 12px; }

  .hero-meta {
    gap: 16px;
    padding: 14px 20px;
    flex-wrap: wrap;
  }

  .hero-meta-divider { display: none; }

  .hero-stage {
    height: 360px;
    margin: 16px auto 32px;
  }

  .stage-card {
    padding: 8px 12px;
    font-size: 12px;
  }

  .stage-card strong { font-size: 13px; }
  .stage-card em { font-size: 11px; }
  .stage-card-icon { width: 30px; height: 30px; }

  .stage-card-1, .stage-card-3 { display: none; }
  .stage-card-2 { left: -4px; bottom: 16%; }
  .stage-card-4 { right: -4px; bottom: 16%; }

  .stage-pulse-1, .stage-pulse-2 { display: none; }

  .robot-bubble {
    font-size: 13px;
    padding: 10px 16px;
    top: 8%;
  }

  .robot-tip { font-size: 11px; padding: 5px 12px; }

  .section { padding: 80px 0; }

  .section-head { margin-bottom: 48px; }

  .scenario-grid,
  .adv-grid {
    grid-template-columns: 1fr;
  }

  .cap-row {
    grid-template-columns: 1fr;
    gap: 40px;
    margin-bottom: 80px;
  }

  .cap-row-reverse .cap-text {
    order: 0;
  }

  .about-wrap {
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .about-visual {
    max-width: 360px;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

  .cta-card {
    padding: 44px 24px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-cols { gap: 20px; }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }
  .hero-stage { height: 300px; }
  .stage-card-2, .stage-card-4 { display: none; }
  .feature-card, .scenario-card, .adv-item { padding: 24px; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
}

/* 减少动效偏好 */
@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;
  }
  .reveal { opacity: 1; transform: none; }
}