/* ========================================
   iPublish Landing Page Styles
   流光溢彩 - AI 创作工具的视觉语言
   ======================================== */

/* ---------- 字体引入 ---------- */
/* 字体通过 HTML <link> 标签加载，性能更好 */

/* ---------- CSS 变量 ---------- */
:root {
  /* 字体系统 */
  --font-heading: 'Playfair Display', 'Noto Serif SC', 'Source Han Serif SC',
                  'Songti SC', 'SimSun', 'STSong', Georgia, serif;
  --font-body: 'Outfit', 'Noto Sans SC', -apple-system, BlinkMacSystemFont,
               'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei',
               'Helvetica Neue', sans-serif;

  /* 品牌色 */
  --color-primary: #FF3355;
  --color-primary-hover: #E62E4D;
  --color-primary-glow: rgba(255, 51, 85, 0.4);
  --color-primary-subtle: rgba(255, 51, 85, 0.1);

  /* 浅色主题 */
  --color-bg: #F7F8FA;
  --color-bg-gradient: linear-gradient(135deg, #F7F8FA 0%, #EDEEF2 100%);
  --color-surface: #FFFFFF;
  --color-surface-elevated: #FFFFFF;
  --color-border: rgba(0, 0, 0, 0.06);
  --color-text: #1F2937;
  --color-text-secondary: #6B7280;
  --color-text-muted: #9CA3AF;

  /* 玻璃态 */
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);

  /* 间距 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

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

  /* 动画 */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 0.2s;
  --duration-normal: 0.3s;
  --duration-slow: 0.5s;
}

/* 深色主题 */
[data-theme="dark"] {
  --color-bg: #0D0D0F;
  --color-bg-gradient: linear-gradient(135deg, #0D0D0F 0%, #141418 100%);
  --color-surface: #1A1A1E;
  --color-surface-elevated: #222226;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-text: #F3F4F6;
  --color-text-secondary: #9CA3AF;
  --color-text-muted: #6B7280;

  --glass-bg: rgba(26, 26, 30, 0.8);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--color-bg-gradient);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--duration-slow) var(--ease-out-expo),
              color var(--duration-normal) var(--ease-out-expo);
}

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

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- 标题字体（衬线体） ---------- */
.hero-title,
.section-title,
.cta-title,
.benefit-title,
.step-title,
.faq-question {
  font-family: var(--font-heading);
}

/* 大标题字间距微调 */
.hero-title,
.section-title,
.cta-title {
  letter-spacing: -0.01em;
}

/* ---------- 通用组件 ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-xl);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 600px;
  margin: -1.5rem auto var(--spacing-xl);
}

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 4px 16px var(--color-primary-glow),
              inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--color-primary-glow),
              inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.btn-secondary:hover {
  background: var(--color-surface-elevated);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-icon {
  width: 20px;
  height: 20px;
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-sm) 0;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.navbar.scrolled {
  box-shadow: var(--glass-shadow);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: 'Outfit', sans-serif;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-text);
}

.navbar-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-link {
  padding: 0.5rem 1rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-out-expo);
}

.nav-link:hover {
  color: var(--color-text);
  background: var(--color-primary-subtle);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease-out-expo);
  color: var(--color-text-secondary);
}

.theme-toggle:hover {
  background: var(--color-surface-elevated);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: rotate(15deg);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.mobile-menu-btn span {
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: all var(--duration-fast) var(--ease-out-expo);
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 80px;
  overflow: hidden;
}

/* 背景光晕效果 */
.hero-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.5;
  pointer-events: none;
  animation: glow-pulse 8s ease-in-out infinite;
}

.hero-glow-1 {
  top: 10%;
  right: -10%;
  background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
}

.hero-glow-2 {
  bottom: 10%;
  left: -10%;
  background: radial-gradient(circle, #6366F1 0%, transparent 70%);
  animation-delay: -4s;
}

@keyframes glow-pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.4;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.6;
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.hero-text {
  max-width: 560px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.5rem 1rem;
  background: var(--color-primary-subtle);
  border: 1px solid rgba(255, 51, 85, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  animation: fade-in-up 0.6s var(--ease-out-expo) backwards;
}

.hero-badge svg {
  width: 16px;
  height: 16px;
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-md);
  animation: fade-in-up 0.6s var(--ease-out-expo) 0.1s backwards;
}

.hero-title-highlight {
  background: linear-gradient(135deg, var(--color-primary) 0%, #FF6B8A 50%, #FF8A6B 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
  animation: fade-in-up 0.6s var(--ease-out-expo) 0.2s backwards;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  animation: fade-in-up 0.6s var(--ease-out-expo) 0.3s backwards;
}

.hero-stats {
  display: flex;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  animation: fade-in-up 0.6s var(--ease-out-expo) 0.4s backwards;
}

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

.stat-value {
  font-family: 'Outfit', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Hero 右侧产品展示 */
.hero-visual {
  position: relative;
  animation: fade-in-up 0.8s var(--ease-out-expo) 0.2s backwards;
}

.hero-mockup {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.15),
              0 0 0 1px var(--color-border);
  overflow: hidden;
  aspect-ratio: 4/3;
  z-index: 5;
}

.mockup-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--color-surface-elevated);
  border-bottom: 1px solid var(--color-border);
}

.mockup-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-border);
}

.mockup-dot:first-child { background: #FF5F57; }
.mockup-dot:nth-child(2) { background: #FEBC2E; }
.mockup-dot:nth-child(3) { background: #28C840; }

.mockup-content {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.mockup-input {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.mockup-input-text {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.mockup-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
}

.mockup-card {
  padding: var(--spacing-sm);
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.mockup-card-img {
  width: 100%;
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--color-primary-subtle) 0%, rgba(99, 102, 241, 0.1) 100%);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-xs);
}

.mockup-card-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.mockup-card-desc {
  font-size: 0.625rem;
  color: var(--color-text-muted);
}

/* 浮动元素 */
.hero-float {
  position: absolute;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-sm) var(--spacing-md);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  font-weight: 500;
  animation: float 6s ease-in-out infinite;
  z-index: 10;
}

.hero-float-1 {
  top: 20%;
  right: -20px;
  animation-delay: -2s;
}

.hero-float-2 {
  bottom: 20%;
  left: -20px;
  animation-delay: -4s;
}

.hero-float-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.hero-float-icon.purple {
  background: rgba(99, 102, 241, 0.1);
  color: #6366F1;
}

.hero-float-icon.green {
  background: rgba(16, 185, 129, 0.1);
  color: #10B981;
}

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

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Benefits Section ---------- */
.benefits {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}

.benefit-card {
  padding: var(--spacing-lg);
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  transition: all var(--duration-normal) var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.benefit-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out-expo);
}

.benefit-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
  border-color: var(--color-primary-subtle);
}

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

.benefit-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.benefit-card:hover .benefit-icon {
  background: var(--color-primary);
  transform: scale(1.1);
}

.benefit-card:hover .benefit-icon svg {
  color: white;
}

.benefit-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
  transition: color var(--duration-normal) var(--ease-out-expo);
}

.benefit-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.benefit-description {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ---------- How it Works Section ---------- */
.how-it-works {
  position: relative;
}

/* 步骤时间线容器 */
.steps-timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

/* 流光进度条轨道 */
.timeline-track {
  position: absolute;
  top: 48px;
  left: 16.67%;
  right: 16.67%;
  height: 3px;
  background: var(--color-border);
  border-radius: 2px;
  overflow: hidden;
}

/* 流光进度条 - 使用 CSS Scroll-Driven Animation */
.timeline-progress {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg,
    var(--color-primary) 0%,
    var(--color-primary) 50%,
    transparent 50%);
  background-size: 200% 100%;
  border-radius: 2px;
  transform-origin: left;
  transform: scaleX(0);

  /* 现代浏览器：滚动驱动动画 */
  animation: progressReveal 1s ease-out forwards;
  animation-timeline: view();
  animation-range: entry 0% cover 40%;
}

@keyframes progressReveal {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* 流光效果 */
.timeline-track::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 60px;
  height: 100%;
  background: linear-gradient(90deg,
    transparent,
    rgba(255, 255, 255, 0.6),
    transparent);
  animation: shimmer 4s ease-in-out infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-60px); opacity: 0; }
  50% { opacity: 1; }
  100% { transform: translateX(calc(100vw * 0.67)); opacity: 0; }
}

.steps-container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  position: relative;
}

/* 步骤编号徽章 */
.step-badge {
  position: absolute;
  top: -4px;
  left: -4px;
  width: 28px;
  height: 28px;
  background: var(--color-border);
  color: var(--color-text-muted);
  border-radius: 50%;
  font-family: 'Outfit', sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
  transition: all 0.5s var(--ease-out-expo);
}

/* 步骤卡片激活状态 */
.step-card.is-active .step-badge {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 2px 12px var(--color-primary-glow);
  animation: badgePop 0.4s var(--ease-out-back);
}

.step-card.is-active .step-number {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-subtle);
}

/* 激活时的光晕脉冲 */
.step-card.is-active .step-number::after {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  opacity: 0;
  animation: activePulse 1.5s ease-out infinite;
}

@keyframes badgePop {
  0% { transform: scale(0.5); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

@keyframes activePulse {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.3); opacity: 0; }
}

.step-card {
  flex: 1;
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-number {
  width: 96px;
  height: 96px;
  margin: 0 auto var(--spacing-lg);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-normal) var(--ease-out-expo);
  position: relative;
}

.step-number::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #6366F1);
  opacity: 0;
  z-index: -1;
  transition: opacity var(--duration-normal) var(--ease-out-expo);
}

.step-card:hover .step-number {
  border-color: transparent;
  transform: scale(1.05);
}

.step-card:hover .step-number::before {
  opacity: 1;
}

.step-number-inner {
  width: 88px;
  height: 88px;
  background: var(--color-surface);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Outfit', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.step-icon {
  font-size: 2.5rem;
}

.step-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.step-description {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: 280px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ---------- FAQ Section ---------- */
.faq {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: var(--spacing-lg) 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: color var(--duration-fast) var(--ease-out-expo);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--color-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-normal) var(--ease-out-expo);
}

.faq-item.active .faq-answer {
  max-height: 200px;
}

.faq-answer-inner {
  padding-bottom: var(--spacing-lg);
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ---------- CTA Section ---------- */
.cta {
  position: relative;
  overflow: hidden;
}

.cta-inner {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary) 0%, #E62E4D 50%, #D92545 100%);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-3xl) var(--spacing-2xl);
  text-align: center;
  overflow: hidden;
}

/* CTA 背景装饰 */
.cta-inner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.cta-inner::after {
  content: '';
  position: absolute;
  bottom: -50%;
  left: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 0, 0, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: white;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
}

.cta-description {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-lg);
}

.cta .btn-secondary {
  background: white;
  color: var(--color-primary);
  border: none;
  font-size: 1.125rem;
  padding: 1rem 2rem;
}

.cta .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* 下载按钮行 */
.download-buttons-row {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  background: white;
  color: #333;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--duration-normal) var(--ease-out-expo);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  border-color: rgba(0, 0, 0, 0.15);
}

.btn-download-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.download-info {
  margin-top: var(--spacing-md);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  font-family: 'Outfit', monospace;
  letter-spacing: 0.02em;
}

/* ---------- Footer ---------- */
.footer {
  padding: var(--spacing-2xl) 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-logo {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.footer-text {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.footer-link {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-out-expo);
}

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

.footer-copyright {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ---------- 响应式设计 ---------- */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text {
    max-width: 100%;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    max-width: 600px;
    margin: 0 auto;
  }

  .hero-float {
    display: none;
  }

  .benefits-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .section {
    padding: var(--spacing-2xl) 0;
  }

  .navbar-nav {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 var(--spacing-2xl);
  }

  .hero-glow {
    width: 300px;
    height: 300px;
  }

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

  .steps-container {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
  }

  .timeline-track {
    display: none;
  }

  .step-card {
    max-width: 320px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
  }

  .stat-item {
    text-align: center;
  }

  .cta-inner {
    padding: var(--spacing-2xl) var(--spacing-md);
  }
}

/* ---------- 滚动条样式 ---------- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ---------- 选择文本样式 ---------- */
::selection {
  background: var(--color-primary);
  color: white;
}

/* ========================================
   特效层 - 参考 flutteryourway.com
   ======================================== */

/* ---------- 特效颜色变量 ---------- */
:root {
  --effect-primary: rgba(255, 51, 85, 0.8);
  --effect-secondary: rgba(99, 102, 241, 0.6);
  --effect-surface: rgba(255, 255, 255, 0.95);
  --effect-line: rgba(255, 51, 85, 0.25);
  --particle-color: rgba(255, 51, 85, 0.5);
  --particle-line: rgba(255, 51, 85, 0.15);
  --cube-front: linear-gradient(180deg, #FF3355 0%, #E62E4D 100%);
  --cube-side: linear-gradient(180deg, #E62E4D 0%, #D92545 100%);
  --cube-top-bg: var(--color-surface);
}

[data-theme="dark"] {
  --effect-primary: rgba(255, 51, 85, 0.9);
  --effect-secondary: rgba(129, 140, 248, 0.7);
  --effect-surface: rgba(26, 26, 30, 0.95);
  --effect-line: rgba(255, 51, 85, 0.35);
  --particle-color: rgba(255, 51, 85, 0.6);
  --particle-line: rgba(255, 51, 85, 0.2);
  --cube-top-bg: var(--color-surface);
}

/* ---------- 3D 等距立方体 ---------- */
.cube-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 180px;
  height: 180px;
  perspective: 1000px;
  z-index: 0;
  pointer-events: none;
}

.cube {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transform: rotateX(-20deg) rotateY(-30deg);
  animation: cube-float 8s ease-in-out infinite;
}

.cube-face {
  position: absolute;
  width: 180px;
  height: 180px;
  border: 1px solid rgba(255, 51, 85, 0.2);
  backface-visibility: visible;
}

/* 立方体顶面 - 展示 logo */
.cube-face.top {
  background: var(--cube-top-bg);
  transform: rotateX(90deg) translateZ(90px);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed rgba(255, 51, 85, 0.3);
  border-radius: 12px;
}

.cube-logo {
  width: 100px;
  height: 100px;
  opacity: 0.9;
  filter: drop-shadow(0 4px 8px rgba(255, 51, 85, 0.2));
}

/* 立方体正面 */
.cube-face.front {
  background: var(--cube-front);
  transform: translateZ(90px);
  border-radius: 0 0 8px 8px;
}

/* 立方体右侧面 */
.cube-face.right {
  background: var(--cube-side);
  transform: rotateY(90deg) translateZ(90px);
  border-radius: 0 8px 8px 0;
}

/* 立方体底面 */
.cube-face.bottom {
  background: rgba(0, 0, 0, 0.1);
  transform: rotateX(-90deg) translateZ(90px);
}

/* 立方体背面 */
.cube-face.back {
  background: rgba(255, 51, 85, 0.3);
  transform: translateZ(-90px);
}

/* 立方体左侧面 */
.cube-face.left {
  background: rgba(255, 51, 85, 0.4);
  transform: rotateY(-90deg) translateZ(90px);
}

/* 立方体浮动动画 */
@keyframes cube-float {
  0%, 100% {
    transform: rotateX(-20deg) rotateY(-30deg) translateY(0);
  }
  50% {
    transform: rotateX(-20deg) rotateY(-30deg) translateY(-15px);
  }
}

/* 立方体光晕效果 */
.cube-container::after {
  content: '';
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 20px;
  background: radial-gradient(ellipse, rgba(255, 51, 85, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  animation: cube-shadow 8s ease-in-out infinite;
}

@keyframes cube-shadow {
  0%, 100% { opacity: 0.6; transform: translateX(-50%) scale(1); }
  50% { opacity: 0.3; transform: translateX(-50%) scale(0.8); }
}

/* ---------- 思维气泡（Your Idea 风格） ---------- */
.idea-bubble {
  position: absolute;
  top: 5%;
  left: -80px;
  background: var(--effect-surface);
  border-radius: 24px;
  padding: 14px 22px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  border: 1px solid var(--color-border);
  animation: bubble-float 5s ease-in-out infinite;
  z-index: 10;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* 云朵小圆点（思维气泡的尾巴） */
.idea-bubble::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  background: var(--effect-surface);
  border-radius: 50%;
  border: 1px solid var(--color-border);
  bottom: -12px;
  right: 30px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
}

.idea-bubble::after {
  content: '';
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--effect-surface);
  border-radius: 50%;
  border: 1px solid var(--color-border);
  bottom: -24px;
  right: 20px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
}

.idea-bubble-content {
  display: flex;
  align-items: center;
  gap: 10px;
}

.idea-bubble-icon {
  width: 28px;
  height: 28px;
  background: var(--color-primary-subtle);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.idea-bubble-icon svg {
  width: 16px;
  height: 16px;
}

.idea-bubble-text {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

/* 打字光标动画 */
.idea-bubble-text::after {
  content: '|';
  color: var(--color-primary);
  animation: blink-cursor 1s step-end infinite;
  margin-left: 2px;
}

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

@keyframes bubble-float {
  0%, 100% { transform: translateY(0) rotate(-1deg); }
  50% { transform: translateY(-8px) rotate(1deg); }
}

/* ---------- 虚线流动路径（SVG） ---------- */
.flow-path-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: visible;
}

.flow-path-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.flow-line {
  stroke-dasharray: 8 6;
  stroke-dashoffset: 0;
  animation: flow-dash 2s linear infinite;
}

@keyframes flow-dash {
  to { stroke-dashoffset: -28; }
}

/* 路径上的节点图标 */
.flow-node {
  position: absolute;
  width: 36px;
  height: 36px;
  background: var(--effect-surface);
  border-radius: 50%;
  border: 2px solid var(--effect-line);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  animation: node-pulse 3s ease-in-out infinite;
}

.flow-node svg {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
}

.flow-node:nth-child(2) { animation-delay: 0.5s; }
.flow-node:nth-child(3) { animation-delay: 1s; }

@keyframes node-pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 4px 12px rgba(255, 51, 85, 0.1); }
  50% { transform: scale(1.08); box-shadow: 0 4px 16px rgba(255, 51, 85, 0.25); }
}

/* ---------- 粒子背景 Canvas ---------- */
.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.7;
}

/* ---------- 特效响应式适配 ---------- */
@media (max-width: 1024px) {
  .cube-container {
    transform: translate(-50%, -50%) scale(0.7);
  }

  .idea-bubble {
    left: -40px;
  }

  .flow-path-container {
    opacity: 0.6;
  }
}

@media (max-width: 768px) {
  .cube-container,
  .flow-path-container,
  .hero-particles {
    display: none;
  }

  .idea-bubble {
    position: relative;
    top: auto;
    left: auto;
    margin-bottom: var(--spacing-md);
    animation: none;
  }

  .idea-bubble::before,
  .idea-bubble::after {
    display: none;
  }
}

/* ---------- 减少动画（无障碍） ---------- */
@media (prefers-reduced-motion: reduce) {
  .cube,
  .idea-bubble,
  .flow-line,
  .flow-node,
  .hero-float,
  .hero-glow {
    animation: none !important;
  }

  .idea-bubble-text::after {
    animation: none;
    opacity: 0;
  }
}