/* ==========================================================================
   悠兔机场 (Youtu Cloud) - Nordic Meadow Airy-Botanical 官方样式表
   调色盘：晨雾纯白 (#ffffff) · 嫩芽鼠尾草绿 (#ecfdf5 / #10b981) · 晨光胡萝卜橙 (#ea580c / #f97316)
   极简无冗余、微风摇曳物理交互、轻薄纸质飘浮卡片、全端流畅响应
   ========================================================================== */

/* ----------------- 1. 北欧晨曦草甸色彩系统 ----------------- */
:root {
  /* 基础主色：晨雾白与嫩芽绿 */
  --bg-body: #fbfdfc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-sage-sprout: #ecfdf5;
  --bg-sage-subtle: #f0fdf4;
  --bg-sprout-border: #bbf7d0;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --bg-badge: rgba(16, 185, 129, 0.08);

  /* 文字系统：深邃林木棕黑与草甸深绿 */
  --text-primary: #0f241a;
  --text-secondary: #334d40;
  --text-tertiary: #657e72;
  --text-inverse: #ffffff;

  /* 点睛色：鲜亮诱人的胡萝卜橙 (Carrot Orange) */
  --accent-carrot: #ea580c;
  --accent-carrot-hover: #c2410c;
  --accent-carrot-light: #ffedd5;
  --accent-carrot-glow: rgba(234, 88, 12, 0.22);

  /* 生机绿：嫩草与植物生机色 */
  --accent-sprout: #10b981;
  --accent-sprout-dark: #059669;
  --accent-sprout-light: #d1fae5;

  /* 渐变系列：晨曦微光与生机萌芽 */
  --gradient-meadow: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-sunrise: linear-gradient(135deg, #ea580c 0%, #f97316 50%, #fbbf24 100%);
  --gradient-card: linear-gradient(180deg, #ffffff 0%, #f7fdf9 100%);
  --gradient-parchment: linear-gradient(180deg, #fffcf7 0%, #fffbf0 100%);

  /* 边框与极薄容器线 (Paper-thin Botanical Lines) */
  --border-light: rgba(187, 247, 208, 0.55);
  --border-medium: #86efac;
  --border-delicate: rgba(22, 101, 52, 0.12);
  --border-marker: #e2d9cc;

  /* 柔和弥散阴影 */
  --shadow-sm: 0 2px 6px -1px rgba(16, 185, 129, 0.06);
  --shadow-md: 0 10px 25px -5px rgba(16, 185, 129, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 20px 35px -10px rgba(16, 185, 129, 0.12), 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-carrot: 0 8px 24px -4px rgba(234, 88, 12, 0.3);
  --shadow-parchment: 0 12px 30px -8px rgba(234, 88, 12, 0.08), 0 1px 2px rgba(0, 0, 0, 0.03);

  /* 圆角与曲线 */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  /* 过渡曲线 */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-theme: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}

/* ----------------- 2. 北欧暮色森林 (Dark Mode) ----------------- */
[data-theme="dark"] {
  --bg-body: #07130e;
  --bg-surface: #0e2019;
  --bg-surface-elevated: #132a21;
  --bg-sage-sprout: #142e24;
  --bg-sage-subtle: #0f241c;
  --bg-sprout-border: #1e4536;
  --bg-glass: rgba(14, 32, 25, 0.88);
  --bg-badge: rgba(52, 211, 153, 0.14);

  --text-primary: #f0fdf4;
  --text-secondary: #a7f3d0;
  --text-tertiary: #6ee7b7;
  --text-inverse: #07130e;

  --accent-carrot: #f97316;
  --accent-carrot-hover: #fb923c;
  --accent-carrot-light: rgba(249, 115, 22, 0.18);
  --accent-carrot-glow: rgba(249, 115, 22, 0.35);

  --accent-sprout: #34d399;
  --accent-sprout-dark: #10b981;
  --accent-sprout-light: rgba(52, 211, 153, 0.15);

  --gradient-meadow: linear-gradient(135deg, #059669 0%, #10b981 100%);
  --gradient-sunrise: linear-gradient(135deg, #f97316 0%, #fb923c 50%, #fde047 100%);
  --gradient-card: linear-gradient(180deg, #0e2019 0%, #12281f 100%);
  --gradient-parchment: linear-gradient(180deg, #15261e 0%, #102119 100%);

  --border-light: rgba(52, 211, 153, 0.2);
  --border-medium: rgba(52, 211, 153, 0.35);
  --border-delicate: rgba(52, 211, 153, 0.15);
  --border-marker: #244839;

  --shadow-sm: 0 2px 6px -1px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 35px -10px rgba(0, 0, 0, 0.6);
  --shadow-carrot: 0 8px 24px -4px rgba(249, 115, 22, 0.45);
  --shadow-parchment: 0 12px 30px -8px rgba(0, 0, 0, 0.5);
}

/* ----------------- 3. 全局重置与排版 ----------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.68;
  overflow-x: hidden;
  position: relative;
  transition: var(--transition-theme);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 微风与草甸粒子画布 (Interactive Meadow Breeze Shader Canvas) */
#meadowCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

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

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 1;
}

/* ----------------- 4. 导航栏 (Navbar) ----------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition-theme);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.32rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  text-decoration: none;
}

.brand-logo-img {
  height: 38px;
  width: auto;
  max-width: 46px;
  object-fit: contain;
  display: block;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), filter var(--transition-fast);
}

.brand-logo:hover .brand-logo-img {
  transform: rotate(-6deg) scale(1.12);
}

[data-theme="dark"] .brand-logo-img {
  filter: brightness(0) invert(1);
}

.brand-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  background: var(--bg-sage-sprout);
  color: var(--accent-sprout-dark);
  border: 1px solid var(--border-light);
  letter-spacing: 0.02em;
}

[data-theme="dark"] .brand-badge {
  color: var(--accent-sprout);
}

/* 导航锚点目录 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
}

.nav-links a {
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 4px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-carrot);
  transition: width 0.25s ease, left 0.25s ease;
  border-radius: 2px;
}

.nav-links a:hover {
  color: var(--accent-carrot);
}

.nav-links a:hover::after {
  width: 100%;
  left: 0;
}

/* 推荐资讯特殊微标 */
.nav-news-link {
  color: var(--accent-carrot) !important;
  font-weight: 700 !important;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.sprout-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-carrot);
  animation: sproutBlink 2s infinite ease-in-out;
}

@keyframes sproutBlink {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 精致半透明昼夜模式切换按钮 */
.theme-toggle-btn {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--bg-sage-sprout);
  border: 1px solid var(--border-light);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.theme-toggle-btn:hover {
  border-color: var(--border-medium);
  color: var(--accent-carrot);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
}

.icon-sun {
  display: none;
}

.icon-moon {
  display: block;
}

[data-theme="dark"] .icon-sun {
  display: block;
  transform: rotate(0deg);
}

[data-theme="dark"] .icon-moon {
  display: none;
}

/* 呼吁性 CTA 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 11px 24px;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  white-space: nowrap;
}

/* 晨曦胡萝卜橙 CTA (Sun-drenched Carrot Orange) */
.btn-carrot {
  background: var(--gradient-sunrise);
  color: #ffffff !important;
  box-shadow: var(--shadow-carrot);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-carrot:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 28px -4px rgba(234, 88, 12, 0.45);
}

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

.btn-sprout {
  background: var(--gradient-meadow);
  color: #ffffff !important;
  box-shadow: var(--shadow-sm);
}

.btn-sprout:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-paper {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.btn-paper:hover {
  border-color: var(--accent-carrot);
  color: var(--accent-carrot);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.08rem;
  border-radius: var(--radius-lg);
}

/* ----------------- 5. 主视觉区 (Hero Section) ----------------- */
.hero-section {
  position: relative;
  padding: 85px 0 65px;
  overflow: hidden;
}

/* 晨雾阳光微晕 */
.hero-sunlight-aura {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 850px;
  height: 520px;
  background: radial-gradient(circle, rgba(234, 88, 12, 0.12) 0%, rgba(16, 185, 129, 0.1) 45%, transparent 72%);
  filter: blur(80px);
  z-index: 0;
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 1180px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* 嫩芽微风勋章 (Airy Sprout Badge) */
.hero-sprout-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 20px;
  border-radius: var(--radius-full);
  background: var(--bg-sage-sprout);
  border: 1px solid var(--border-light);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent-sprout-dark);
  margin-bottom: 26px;
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .hero-sprout-badge {
  color: var(--accent-sprout);
}

.sprout-leaf-icon {
  width: 18px;
  height: 18px;
  color: var(--accent-sprout);
  animation: leafRustle 3s ease-in-out infinite;
}

@keyframes leafRustle {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(8deg); }
  75% { transform: rotate(-6deg); }
}

/* 大标题包含当前品牌名 - 严格单行展示不分行 (nowrap) */
.hero-title {
  font-size: clamp(1.15rem, 2.75vw, 2.55rem);
  white-space: nowrap;
  line-height: 1.35;
  font-weight: 850;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
  color: var(--text-primary);
  text-align: center;
}

.hero-title .brand-highlight {
  color: var(--accent-carrot);
  position: relative;
  display: inline-block;
}

.hero-title .brand-highlight::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 8px;
  background: rgba(234, 88, 12, 0.16);
  border-radius: 4px;
  z-index: -1;
}

.hero-subtitle {
  font-size: 1.35rem;
  font-weight: 650;
  color: var(--text-secondary);
  margin-bottom: 18px;
  line-height: 1.5;
}

/* 简介文字 (Introduction / Brief) */
.hero-intro {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-tertiary);
  max-width: 740px;
  margin: 0 auto 38px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

/* 核心特性数据指标条 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  padding: 26px 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-top: 24px;
  transition: var(--transition-theme);
}

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

.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -9px;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--border-light);
}

.stat-value {
  font-size: 1.85rem;
  font-weight: 850;
  color: var(--accent-sprout-dark);
  letter-spacing: -0.02em;
}

[data-theme="dark"] .stat-value {
  color: var(--accent-sprout);
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-tertiary);
  margin-top: 4px;
  font-weight: 500;
}

/* ----------------- 6. 木质路标风格节点微风摆动面板 (Wooden Path-Marker Node Deck) ----------------- */
.path-marker-deck {
  margin-top: 44px;
  padding: 30px 26px;
  background: var(--gradient-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: left;
  transition: var(--transition-theme);
  position: relative;
}

.deck-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px dashed var(--border-medium);
  padding-bottom: 16px;
  margin-bottom: 22px;
}

.deck-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 750;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.deck-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--accent-sprout-dark);
  background: var(--bg-sage-sprout);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-light);
}

[data-theme="dark"] .deck-status {
  color: var(--accent-sprout);
}

.pulse-sprout-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-sprout);
  box-shadow: 0 0 10px var(--accent-sprout);
}

/* 节点路标网格 */
.node-markers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}

/* 3D 钟摆微风摇曳动画 (Realistic 3D Pendulum Physics) */
.node-marker-pill {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transform-origin: top center;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
  cursor: pointer;
}

.node-marker-pill:hover {
  animation: pendulumSway 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94) infinite alternate;
  border-color: var(--accent-sprout);
  box-shadow: 0 10px 20px -5px rgba(16, 185, 129, 0.2);
}

@keyframes pendulumSway {
  0% { transform: rotate(0deg); }
  30% { transform: rotate(4.5deg); }
  70% { transform: rotate(-3.5deg); }
  100% { transform: rotate(0deg); }
}

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

.marker-flag {
  font-size: 1.35rem;
}

.marker-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
}

.marker-tag {
  font-size: 0.74rem;
  color: var(--text-tertiary);
}

.marker-ping {
  font-size: 0.84rem;
  font-weight: 800;
  color: #047857;
  padding: 3px 10px;
  border-radius: var(--radius-xs);
  background: var(--bg-sage-sprout);
  border: 1px solid var(--border-light);
}

[data-theme="dark"] .marker-ping {
  color: #34d399;
}

/* ----------------- 7. 通用区块结构 ----------------- */
.section {
  padding: 85px 0;
  position: relative;
  z-index: 1;
}

.section-alt {
  background-color: var(--bg-sage-subtle);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition-theme);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.84rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-sprout-dark);
  margin-bottom: 12px;
  background: var(--bg-sage-sprout);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-light);
}

[data-theme="dark"] .section-tag {
  color: var(--accent-sprout);
}

.section-title {
  font-size: 2.35rem;
  font-weight: 850;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.68;
}

/* ----------------- 8. 三大核心优势图文卡片 (Airy Botanical Sprout Cards) ----------------- */
.feature-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

/* 轻薄纸质飘浮卡片 (Floating Paper-thin Containers) */
.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-meadow);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-lg);
}

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

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--bg-sage-sprout);
  color: var(--accent-sprout-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  border: 1px solid var(--border-light);
  transition: transform 0.3s ease;
}

[data-theme="dark"] .feature-icon-box {
  color: var(--accent-sprout);
}

.feature-card:hover .feature-icon-box {
  transform: scale(1.1) rotate(4deg);
}

.feature-icon-box svg {
  width: 28px;
  height: 28px;
}

.feature-card h3 {
  font-size: 1.35rem;
  font-weight: 750;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.feature-tags li {
  font-size: 0.78rem;
  font-weight: 650;
  padding: 4px 11px;
  border-radius: var(--radius-full);
  background: var(--bg-sage-sprout);
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
}

/* ----------------- 9. 流媒体与 AI 支持图卡 (排除通俗 Chatbot 杂乱徽章) ----------------- */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.showcase-card {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 42px 36px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.showcase-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-lg);
}

.showcase-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 750;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: var(--accent-carrot-light);
  color: var(--accent-carrot);
  margin-bottom: 18px;
}

.showcase-card h3 {
  font-size: 1.68rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.showcase-card p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
  line-height: 1.7;
}

/* 纯净生态徽章墙 */
.botanical-logos-wall {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.botanical-logo-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--bg-sage-sprout);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: all 0.25s ease;
}

.botanical-logo-item:hover {
  background: #ffffff;
  border-color: var(--accent-sprout);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .botanical-logo-item:hover {
  background: var(--bg-surface-elevated);
}

.logo-leaf-mark {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 850;
  background: var(--accent-sprout);
  color: #ffffff;
}

.logo-leaf-mark.orange {
  background: var(--accent-carrot);
}

/* ----------------- 10. 羊皮纸质感套餐价格对比表 (Sunlit Parchment Pricing) ----------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

/* 羊皮纸质展开效果 (Sunlit Parchment Sheets) */
.pricing-card {
  position: relative;
  background: var(--gradient-parchment);
  border: 1px solid var(--border-marker);
  border-radius: var(--radius-lg);
  padding: 44px 34px;
  display: flex;
  flex-direction: column;
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: var(--shadow-parchment);
}

.pricing-card:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-carrot);
}

/* 推荐主力套餐高亮 */
.pricing-card.featured {
  border: 2px solid var(--accent-carrot);
  box-shadow: 0 16px 36px -10px rgba(234, 88, 12, 0.25);
  background: var(--bg-surface);
}

.pricing-badge-popular {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-sunrise);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 5px 20px;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  box-shadow: var(--shadow-carrot);
  white-space: nowrap;
}

.plan-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.9rem;
  color: var(--text-tertiary);
  margin-bottom: 26px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px dashed var(--border-medium);
}

.currency {
  font-size: 1.4rem;
  font-weight: 750;
  color: var(--accent-carrot);
}

.price {
  font-size: 3.2rem;
  font-weight: 850;
  color: var(--text-primary);
  line-height: 1;
}

.period {
  font-size: 0.92rem;
  color: var(--text-tertiary);
  font-weight: 600;
}

.plan-features {
  list-style: none;
  margin-bottom: 34px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.94rem;
  color: var(--text-secondary);
}

.plan-features svg {
  width: 18px;
  height: 18px;
  color: var(--accent-sprout-dark);
  flex-shrink: 0;
}

[data-theme="dark"] .plan-features svg {
  color: var(--accent-sprout);
}

.plan-features .highlight-text {
  font-weight: 800;
  color: var(--text-primary);
}

/* ----------------- 11. 用户真实评价 (Testimonials) ----------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.testimonial-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-md);
}

.rating-stars {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 14px;
}

.rating-stars svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.testimonial-text {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.user-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
}

.user-avatar-initial {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-sage-sprout);
  color: var(--accent-sprout-dark);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  border: 1px solid var(--border-light);
}

[data-theme="dark"] .user-avatar-initial {
  color: var(--accent-sprout);
}

.user-info h4 {
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--text-primary);
}

.user-info p {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* ----------------- 12. 常见问题解答 (FAQ) ----------------- */
.faq-container {
  max-width: 820px;
  margin: 0 auto;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.faq-item:hover {
  border-color: var(--border-medium);
}

.faq-item.active {
  border-color: var(--accent-sprout);
  box-shadow: var(--shadow-md);
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--text-tertiary);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-sprout);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.38s ease, padding 0.38s ease;
  padding: 0 26px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 380px;
  padding: 0 26px 24px;
}

/* 底部草甸召唤横幅 */
.bottom-meadow-banner {
  background: var(--gradient-sunrise);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-carrot);
  margin-top: 48px;
}

.bottom-meadow-banner h2 {
  font-size: 2.4rem;
  font-weight: 850;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.bottom-meadow-banner p {
  font-size: 1.15rem;
  max-width: 640px;
  margin: 0 auto 34px;
  opacity: 0.95;
}

.btn-white-meadow {
  background: #ffffff;
  color: #ea580c !important;
  font-weight: 800;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.btn-white-meadow:hover {
  background: #fbfdfc;
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
}

/* ----------------- 13. 页脚规范 (Footer) ----------------- */
/* 严格要求：页脚仅保留四个标题，在新页面打开展示 */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-light);
  padding: 46px 0 38px;
  transition: var(--transition-theme);
  position: relative;
  z-index: 1;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  list-style: none;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 6px;
  transition: all 0.2s ease;
}

.footer-nav a:hover {
  color: var(--accent-carrot);
  transform: translateY(-1px);
}

.footer-divider {
  width: 100%;
  max-width: 580px;
  height: 1px;
  background: var(--border-light);
  margin: 0 auto 22px;
}

.footer-bottom {
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-tertiary);
}

.footer-brand-title {
  font-weight: 750;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

/* ----------------- 14. 推荐资讯专栏与独立文章页排版 ----------------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.news-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 34px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-lg);
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.84rem;
  color: var(--text-tertiary);
}

.news-badge {
  background: var(--accent-carrot-light);
  color: var(--accent-carrot);
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.news-card h3 {
  font-size: 1.28rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.45;
}

.news-card p {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.news-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 750;
  color: var(--accent-sprout-dark);
  font-size: 0.92rem;
}

[data-theme="dark"] .news-read-more {
  color: var(--accent-sprout);
}

.news-card:hover .news-read-more {
  color: var(--accent-carrot);
}

/* 独立法律/关于/地图页排版 */
.legal-page-header {
  padding: 65px 0 42px;
  background: var(--bg-sage-sprout);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition-theme);
  position: relative;
  z-index: 1;
}

.legal-page-content {
  padding: 60px 0 95px;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.legal-block {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 42px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-theme);
}

.legal-block h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.legal-block p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.legal-block ul, .legal-block ol {
  margin: 14px 0 22px 26px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.legal-block li {
  margin-bottom: 10px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--accent-sprout-dark);
  margin-bottom: 22px;
}

[data-theme="dark"] .back-link {
  color: var(--accent-sprout);
}

.back-link:hover {
  color: var(--accent-carrot);
}

.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.sitemap-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 30px;
  box-shadow: var(--shadow-sm);
}

.sitemap-card h3 {
  font-size: 1.22rem;
  font-weight: 750;
  margin-bottom: 16px;
  color: var(--text-primary);
  border-bottom: 1px dashed var(--border-medium);
  padding-bottom: 12px;
}

.sitemap-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sitemap-card a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.95rem;
}

.sitemap-card a:hover {
  color: var(--accent-carrot);
}

/* ----------------- 15. 响应式适配 (@media) ----------------- */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.8rem;
  }
  .feature-cards-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 490px;
    margin: 0 auto;
  }
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .nav-links {
    display: none; /* 移动端收拢导航，聚焦核心行动 */
  }
}

@media (max-width: 768px) {
  .hero-section {
    padding: 55px 0 45px;
  }

  .hero-title {
    font-size: clamp(0.85rem, 3.4vw, 1.45rem);
    white-space: nowrap;
    line-height: 1.35;
  }

  .hero-subtitle {
    font-size: 1.08rem;
    margin-bottom: 14px;
  }

  .hero-intro {
    font-size: 0.96rem;
    margin-bottom: 30px;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 50px;
  }

  .media-ai-grid {
    grid-template-columns: 1fr;
  }

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

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

  .footer-nav {
    flex-direction: column;
    gap: 18px;
  }

  .legal-block {
    padding: 26px 20px;
  }

  .bottom-meadow-banner {
    padding: 42px 22px;
  }

  .bottom-meadow-banner h2 {
    font-size: 1.75rem;
  }

  .btn-white-meadow {
    width: 100%;
    min-height: 50px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-title {
    font-size: clamp(0.7rem, 3.4vw, 1.05rem);
    white-space: nowrap;
    line-height: 1.35;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .stat-item:not(:last-child)::after {
    display: none;
  }

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

/* ----------------- 16. SEO 深度长文与排版专用样式 (Article Typography & TOC) ----------------- */
.article-wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 0 90px;
  position: relative;
  z-index: 1;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-tertiary);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-secondary);
  font-weight: 600;
}

.breadcrumbs a:hover {
  color: var(--accent-carrot);
}

.article-header {
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 28px;
}

.article-header h1 {
  font-size: 2.25rem;
  line-height: 1.32;
  font-weight: 850;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.88rem;
  color: var(--text-tertiary);
}

.article-meta-bar span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 目录引导箱 (Table of Contents Box) */
.toc-box {
  background: var(--bg-sage-sprout);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 32px 0 40px;
  box-shadow: var(--shadow-sm);
}

.toc-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
  border-bottom: 1px dashed var(--border-light);
  padding-bottom: 10px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-list li {
  font-size: 0.94rem;
  line-height: 1.5;
}

.toc-list a {
  color: var(--text-secondary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-fast);
}

.toc-list a:hover {
  color: var(--accent-carrot);
  transform: translateX(4px);
}

.toc-list .toc-sub {
  margin-left: 22px;
  margin-top: 6px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-left: 2px solid var(--border-light);
  padding-left: 12px;
}

.toc-list .toc-sub a {
  font-size: 0.88rem;
  color: var(--text-tertiary);
}

/* 正文深度排版 */
.article-body {
  font-size: 1.04rem;
  line-height: 1.82;
  color: var(--text-secondary);
}

.article-body p {
  margin-bottom: 22px;
}

.article-body h2 {
  font-size: 1.62rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 48px 0 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 750;
  color: var(--text-primary);
  margin: 32px 0 14px;
}

.article-body ul, .article-body ol {
  margin: 16px 0 24px 26px;
  line-height: 1.8;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body strong {
  color: var(--text-primary);
  font-weight: 750;
}

/* 提示与高亮引语框 (Callout Box) */
.article-callout {
  padding: 20px 24px;
  border-radius: var(--radius-md);
  margin: 28px 0;
  background: var(--bg-surface);
  border-left: 4px solid var(--accent-sprout);
  box-shadow: var(--shadow-sm);
  border-top: 1px solid var(--border-light);
  border-right: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.article-callout.orange {
  border-left-color: var(--accent-carrot);
  background: rgba(234, 88, 12, 0.04);
}

.callout-title {
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 响应式数据对比表格 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
  background: var(--bg-surface);
}

.article-table th {
  background: var(--bg-sage-sprout);
  color: var(--text-primary);
  font-weight: 750;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-medium);
}

.article-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
}

.article-table tr:last-child td {
  border-bottom: none;
}

.article-table tr:hover td {
  background: var(--bg-sage-subtle);
}

/* 文章内置 FAQ 与相关阅读 */
.article-faq-section {
  margin: 56px 0 40px;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
}

.article-faq-section h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.related-posts-section {
  margin-top: 60px;
  border-top: 1px solid var(--border-light);
  padding-top: 40px;
}

.related-posts-section h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.related-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.related-card:hover {
  border-color: var(--border-medium);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.related-card h4 {
  font-size: 1.05rem;
  font-weight: 750;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.45;
}

.related-card:hover h4 {
  color: var(--accent-carrot);
}

.related-card p {
  font-size: 0.86rem;
  color: var(--text-tertiary);
  line-height: 1.6;
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .article-header h1 {
    font-size: 1.7rem;
  }
  .article-body h2 {
    font-size: 1.35rem;
  }
  .toc-box {
    padding: 18px 20px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
}