/* 椿守 CHUNVOW 产品介绍站 */

:root {
  --primary: #F26922;
  --primary-dark: #E05A14;
  --primary-light: #FFF5F0;
  --accent: #F97316;
  --green: #77C24E;
  --green-dark: #5FA83A;
  --green-light: #E8F5E0;

  --text-primary: #1A1A1A;
  --text-secondary: #5C5C5C;
  --text-muted: #8E8E93;
  --bg-white: #FFFFFF;
  --bg-light: #F5F6FA;
  --bg-warm: #FFFBF7;
  --border: #E8E8ED;

  --gradient-brand: linear-gradient(135deg, #F26922 0%, #FBBF24 100%);
  --gradient-hero: linear-gradient(160deg, #FFFBF7 0%, #FFF8F0 40%, #F5FAF0 100%);

  --shadow-sm: 0 1px 3px rgba(26, 26, 26, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 26, 26, 0.08);
  --shadow-lg: 0 20px 48px rgba(26, 26, 26, 0.1);
  --shadow-brand: 0 12px 32px rgba(242, 105, 34, 0.25);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --nav-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--bg-white);
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.align-left { text-align: left; }

/* ===== 导航 ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.navbar.scrolled {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

.logo-img-sm {
  width: 36px;
  height: 36px;
}

.logo-text-group {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-en {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a:not(.btn) {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.nav-links a:not(.btn):hover { color: var(--primary); }

.btn-nav { padding: 10px 20px !important; font-size: 14px !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

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

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.btn-primary {
  background: var(--gradient-brand);
  color: white;
  box-shadow: var(--shadow-brand);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(242, 105, 34, 0.35);
}

.btn-secondary {
  background: white;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary-light);
}

.btn-large { padding: 14px 32px; font-size: 16px; }

.btn-white {
  background: white;
  color: var(--text-primary);
}

.btn-white:hover { background: var(--bg-light); }

.btn-outline-white {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.45);
}

.btn-outline-white:hover {
  background: white;
  color: var(--text-primary);
  border-color: white;
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  padding: calc(var(--nav-h) + 48px) 0 80px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -15%;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(242, 105, 34, 0.08) 0%, transparent 65%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -8%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(119, 194, 78, 0.07) 0%, transparent 65%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.hero-brand-en {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-left: 6px;
}

.hero-title {
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.hero-title .highlight {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-slogan-en {
  font-size: 17px;
  font-style: italic;
  color: var(--text-muted);
  margin-bottom: 20px;
  letter-spacing: 0.01em;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

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

.hero-tag {
  padding: 6px 14px;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Hero 手机 mock */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-phone {
  background: white;
  border-radius: var(--radius-2xl);
  padding: 12px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 280px;
  transform: perspective(800px) rotateY(-4deg);
  transition: transform 0.5s ease;
}

.hero-phone:hover { transform: perspective(800px) rotateY(0); }

.phone-screen {
  background: linear-gradient(180deg, var(--primary-light) 0%, white 30%);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  overflow: hidden;
  aspect-ratio: 9/18;
  display: flex;
  flex-direction: column;
}

.phone-header {
  background: var(--gradient-brand);
  padding: 24px 20px;
  color: white;
  text-align: center;
}

.phone-logo {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  object-fit: contain;
  margin: 0 auto 10px;
  display: block;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.phone-app-name { font-size: 20px; font-weight: 700; }
.phone-app-sub { font-size: 12px; opacity: 0.9; margin-top: 4px; }

.phone-content {
  flex: 1;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.phone-card {
  background: white;
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.phone-card-checkin { border-color: rgba(119, 194, 78, 0.35); }

.phone-card-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--green-light);
  color: var(--green-dark);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.phone-card-icon.muted {
  background: var(--bg-light);
  color: var(--text-muted);
  font-size: 14px;
}

.phone-card-title { font-size: 13px; font-weight: 600; }
.phone-card-meta { font-size: 11px; color: var(--text-muted); margin-top: 2px; }
.phone-card-meta.success { color: var(--green-dark); }

.phone-sos {
  margin-top: auto;
  background: linear-gradient(135deg, #EF4444, #DC2626);
  color: white;
  text-align: center;
  padding: 14px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.35);
}

.hero-float {
  position: absolute;
  background: white;
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  font-size: 13px;
}

.hero-float-mini {
  top: 8%;
  right: 0;
  border-left: 3px solid var(--accent);
}

.hero-float-egg {
  bottom: 12%;
  left: -8%;
  border-left: 3px solid var(--green);
}

.float-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.float-value {
  display: block;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 2px;
}

/* ===== 通用区块 ===== */
.section { padding: 96px 0; }

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-label {
  display: inline-block;
  padding: 6px 14px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== 产品卡片 ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.product-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s, box-shadow 0.35s, opacity 0.6s, transform 0.6s;
  opacity: 0;
  transform: translateY(24px);
  position: relative;
  display: flex;
  flex-direction: column;
}

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

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.product-card.in-view:hover { transform: translateY(-6px); }

.product-card.featured {
  border-color: rgba(242, 105, 34, 0.35);
  box-shadow: var(--shadow-md), 0 0 0 1px rgba(242, 105, 34, 0.1);
}

.product-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--bg-light);
  color: var(--text-muted);
}

.product-badge-soon {
  background: var(--bg-light);
  color: var(--text-muted);
}

.product-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 20px;
  color: var(--primary);
}

.product-card-mini .product-icon { color: #3B82F6; }
.product-card-egg .product-icon { color: var(--green-dark); }

.product-name {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 6px;
}

.product-tagline {
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 14px;
}

.product-card-mini .product-tagline { color: #2563EB; }
.product-card-egg .product-tagline { color: var(--green-dark); }

.product-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
  flex: 1;
}

.product-feature-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.product-feature-list li {
  font-size: 13px;
  color: var(--text-secondary);
  padding-left: 18px;
  position: relative;
}

.product-feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}

/* ===== 守护闭环 ===== */
.section-how { background: var(--bg-light); }

.flow-steps {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 16px;
}

.flow-step {
  flex: 1;
  max-width: 300px;
  background: white;
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  border: 1px solid var(--border);
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s, transform 0.5s;
}

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

.flow-num {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: white;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.flow-step h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

.flow-step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.flow-arrow {
  display: flex;
  align-items: center;
  font-size: 24px;
  color: var(--text-muted);
  padding-top: 48px;
}

@media (max-width: 1024px) {
  .flow-arrow {
    transform: rotate(90deg);
    padding: 0;
    margin: -8px 0;
  }
}

/* ===== 守护蛋 ===== */
.device-section { background: white; }

.device-showcase {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 64px;
  align-items: center;
}

.device-visual {
  display: flex;
  justify-content: center;
}

.device-render-wrap {
  margin: 0;
  text-align: center;
  animation: float 5s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.device-render {
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto;
  display: block;
  filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.12));
}

.device-render-caption {
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.caption-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.device-planned-note {
  margin-top: 16px;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  line-height: 1.55;
}

.device-features-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.device-feature-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  opacity: 0;
  transform: translateX(-12px);
  transition: opacity 0.5s, transform 0.5s;
}

.device-feature-item.in-view {
  opacity: 1;
  transform: translateX(0);
}

.device-feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.device-feature-icon svg {
  width: 26px;
  height: 26px;
  display: block;
}

.icon-red { background: #FEE2E2; color: #DC2626; }
.icon-orange { background: var(--primary-light); color: var(--primary); }
.icon-green { background: var(--green-light); color: var(--green-dark); }
.icon-muted { background: #EEF2FF; color: #4F46E5; }

.device-feature-item h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.device-feature-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== 功能网格 ===== */
.features-section { background: var(--bg-warm); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-box {
  background: white;
  border-radius: var(--radius-xl);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s, transform 0.5s, box-shadow 0.3s;
}

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

.feature-box:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.feature-box.in-view:hover { transform: translateY(-4px); }

.feature-icon-wrap {
  font-size: 32px;
  margin-bottom: 14px;
}

.feature-box h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-box p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== 场景 ===== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  border: 1px solid var(--border);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s, transform 0.5s, box-shadow 0.3s;
}

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

.scenario-card:hover {
  box-shadow: var(--shadow-md);
}

.scenario-daily:hover {
  border-color: rgba(119, 194, 78, 0.4);
}

.scenario-daily .scenario-num {
  color: var(--green-dark);
}

.scenario-outdoor:hover {
  border-color: rgba(59, 130, 246, 0.4);
}

.scenario-outdoor .scenario-num {
  color: #2563EB;
}

.scenario-emergency:hover {
  border-color: rgba(239, 68, 68, 0.4);
}

.scenario-emergency .scenario-num {
  color: #DC2626;
}

.scenario-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  letter-spacing: 0.08em;
}

.scenario-card h4 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.scenario-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== 数据条 ===== */
.stats-section {
  background: var(--gradient-brand);
  color: white;
  padding: 72px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item h3 {
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 800;
  margin-bottom: 8px;
}

.stat-item p {
  font-size: 15px;
  opacity: 0.92;
}

/* ===== 品牌故事 ===== */
.story-section { background: var(--bg-light); }

.story-card {
  background: white;
  border-radius: var(--radius-2xl);
  padding: 48px 56px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.story-header { margin-bottom: 32px; }

.founder {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}

.founder-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: white;
  font-size: 28px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 3px solid var(--primary-light);
}

.founder-name {
  font-size: 20px;
  font-weight: 700;
}

.founder-title {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

.founder-quote {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.9;
  border-left: 4px solid var(--primary);
  padding-left: 24px;
  margin-bottom: 24px;
  font-style: normal;
}

.story-company {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(145deg, #1A1A1A 0%, #2D2D2D 100%);
  color: white;
  padding: 96px 0;
  text-align: center;
}

.cta-brand {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.6;
  margin-bottom: 12px;
}

.cta-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 17px;
  opacity: 0.85;
  line-height: 1.8;
  margin-bottom: 32px;
}

.cta-desc a {
  color: #FDBA74;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.cta-desc a:hover { color: white; }

.cta-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-light);
  padding: 64px 0 32px;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-slogan {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 16px 0 4px;
}

.footer-slogan-en {
  font-size: 13px;
  font-style: italic;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.footer-column h5 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-column ul { display: flex; flex-direction: column; gap: 10px; }

.footer-column a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s;
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}

.footer-icp {
  margin-top: 8px;
}

.footer-icp a {
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.footer-icp .sep {
  margin: 0 6px;
  color: var(--text-muted);
  opacity: 0.7;
}

.footer-legal {
  margin-top: 8px;
}

.footer-legal a {
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-legal a:hover {
  color: var(--text-secondary);
}

.footer-legal .sep {
  margin: 0 6px;
  color: var(--text-muted);
  opacity: 0.7;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; text-align: center; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-buttons, .hero-tags { justify-content: center; }
  .hero-float-egg { left: 4%; }
  .products-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .flow-steps { flex-direction: column; align-items: center; }
  .flow-arrow { transform: rotate(90deg); padding: 0; }
  .flow-step { max-width: 100%; width: 100%; }
  .device-showcase { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .scenarios-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .story-card { padding: 32px 28px; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s, opacity 0.3s;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  body.nav-open { overflow: hidden; }

  .section { padding: 64px 0; }
  .hero { padding-bottom: 48px; }
  .hero-float { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .device-render { max-width: 240px; }
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: #C4C4C4; border-radius: 3px; }