/* ===================================================================
   一翻云 (yifanyun.co) - 核心样式表
   风格定位：晨曦橙霞 × 蓝天晴空 × 灵动云境 × 高转化科技风 (Solar Sunset & Sky Horizon)
   完全去重设计：落日橙霞点缀、HTML嵌入式背景图、高对比白底晴空质感、原生流畅微动效
   =================================================================== */

:root {
  /* 晴空与落日橙霞专属调色板 */
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-subtle: #f0f7ff;
  --bg-highlight: #e0f2fe;
  
  /* 暖橙晨曦色系 (严禁使用 #D97757 陶土色，采用高纯度电光落日橙) */
  --accent-orange: #f97316;
  --accent-orange-deep: #ea580c;
  --accent-orange-light: #fb923c;
  --bg-warm-subtle: #fff7ed;
  --bg-warm-card: #ffedd5;
  --border-warm: rgba(249, 115, 22, 0.28);
  --border-warm-glow: rgba(249, 115, 22, 0.45);

  /* 文字系统 (深邃板岩色系，对比度极高，符合 WCAG AAA) */
  --text-main: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-sub: #94a3b8;

  /* 品牌高光与强调色 */
  --accent-sky: #0284c7;
  --accent-sky-hover: #0369a1;
  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-indigo: #4f46e5;
  --accent-amber: #f59e0b;

  /* 边框与微光投影系统 */
  --border-light: rgba(14, 165, 233, 0.12);
  --border-medium: rgba(14, 165, 233, 0.22);
  --border-active: rgba(249, 115, 22, 0.45);
  
  --shadow-sm: 0 2px 8px -1px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 24px -4px rgba(14, 165, 233, 0.10), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  --shadow-warm-md: 0 10px 28px -4px rgba(249, 115, 22, 0.14), 0 2px 8px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 16px 36px -6px rgba(14, 165, 233, 0.14), 0 4px 12px -2px rgba(15, 23, 42, 0.05);
  --shadow-hover: 0 20px 40px -8px rgba(249, 115, 22, 0.22), 0 6px 16px -2px rgba(2, 132, 199, 0.08);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.28s cubic-bezier(0.4, 0, 0.2, 1);

  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --container-max: 1180px;
}

/* ===================================================================
   基础重置与全局排版
   =================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  background-color: var(--bg-primary);
  color: var(--text-body);
  line-height: 1.7;
  letter-spacing: 0.01em;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  background-image: 
    radial-gradient(at 15% 10%, rgba(255, 237, 213, 0.6) 0px, transparent 45%),
    radial-gradient(at 85% 15%, rgba(224, 242, 254, 0.65) 0px, transparent 45%),
    radial-gradient(at 50% 95%, rgba(254, 215, 170, 0.35) 0px, transparent 50%);
  background-attachment: fixed;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

a {
  color: var(--accent-orange-deep);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-orange);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  line-height: 1.32;
  font-weight: 700;
  letter-spacing: -0.015em;
}

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

ul, ol {
  padding-left: 1.4rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.35rem;
}

/* ===================================================================
   高转化按钮体系 (暖橙落日高光 + 扫光动态特效)
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  font-size: 0.96rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

/* 标志性能量暖橙按钮 */
.btn-orange {
  background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(234, 88, 12, 0.35);
}

.btn-orange:hover {
  background: linear-gradient(135deg, #fb923c 0%, #c2410c 100%);
  color: #ffffff;
  box-shadow: 0 6px 22px rgba(234, 88, 12, 0.45);
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0369a1 0%, #1d4ed8 100%);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.38);
  transform: translateY(-2px);
}

.btn-emerald {
  background: linear-gradient(135deg, #059669 0%, #10b981 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.28);
}

.btn-emerald:hover {
  background: linear-gradient(135deg, #047857 0%, #059669 100%);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.38);
  transform: translateY(-2px);
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border-color: var(--border-warm);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--bg-warm-subtle);
  border-color: var(--accent-orange);
  color: var(--accent-orange-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow-warm-md);
}

.btn-lg {
  padding: 13px 30px;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

.btn-block {
  width: 100%;
}

/* 按钮微光掠过动效 */
.btn-shine::after {
  content: "";
  position: absolute;
  top: 0;
  left: -75%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: skewX(-20deg);
  transition: none;
}

.btn-shine:hover::after {
  left: 135%;
  transition: all 0.75s ease-in-out;
}

/* 动态呼吸灯 */
.pulse-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-orange);
  box-shadow: 0 0 0 rgba(249, 115, 22, 0.4);
  animation: pulseOrange 2s infinite;
  margin-right: 6px;
  vertical-align: middle;
}

@keyframes pulseOrange {
  0% { box-shadow: 0 0 0 0 rgba(249, 115, 22, 0.6); }
  70% { box-shadow: 0 0 0 8px rgba(249, 115, 22, 0); }
  100% { box-shadow: 0 0 0 0 rgba(249, 115, 22, 0); }
}

/* 漂浮微动效 */
@keyframes floatGentle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

.animate-float {
  animation: floatGentle 4.5s ease-in-out infinite;
}

/* ===================================================================
   Header & 导航 (暖阳晨光半透明)
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.90);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.03);
  transition: all var(--transition-normal);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
  font-size: 1.32rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo-symbol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
  color: #ffffff;
  border-radius: var(--radius-sm);
  font-size: 1.2rem;
  font-weight: 900;
  box-shadow: 0 4px 14px rgba(249, 115, 22, 0.35);
}

.header-status-pill {
  display: flex;
  align-items: center;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-orange-deep);
  background: var(--bg-warm-subtle);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-warm);
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-desktop a {
  color: var(--text-body);
  font-size: 0.93rem;
  font-weight: 600;
  padding: 6px 0;
  position: relative;
}

.nav-desktop a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-orange);
  transition: width var(--transition-fast);
  border-radius: var(--radius-full);
}

.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--accent-orange);
}

.nav-desktop a:hover::after,
.nav-desktop a.active::after {
  width: 100%;
}

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}

.mobile-nav-panel {
  display: none;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-medium);
  padding: 18px 24px;
  box-shadow: var(--shadow-lg);
}

.mobile-nav-panel.is-open {
  display: block;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav-links a {
  color: var(--text-main);
  padding: 10px 0;
  font-size: 1.05rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border-light);
}

/* ===================================================================
   Hero 主视觉 (嵌入式真实背景图 + 橙霞晴空)
   =================================================================== */
.hero-section {
  padding: 76px 0 68px;
  position: relative;
  overflow: hidden;
}

/* 融入 HTML 的背景图片层 */
.hero-bg-visual {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1600px;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.92;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--border-warm);
  color: var(--accent-orange-deep);
  font-size: 0.84rem;
  font-weight: 800;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 22px;
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.12);
}

.hero-title {
  font-size: 2.95rem;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  line-height: 1.2;
  color: #0f172a;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-body);
  line-height: 1.75;
  margin-bottom: 34px;
  max-width: 600px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 40px;
}

.hero-indicators {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding-top: 28px;
  border-top: 1px solid var(--border-warm);
}

.indicator-item {
  display: flex;
  flex-direction: column;
}

.indicator-num {
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--text-main);
}

.indicator-label {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 右侧网络监测模拟看板 */
.network-console {
  background: #ffffff;
  border: 1px solid var(--border-warm);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-warm-md);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  z-index: 1;
}

.network-console:hover {
  box-shadow: var(--shadow-hover);
}

.console-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: #fff7ed;
  border-bottom: 1px solid var(--border-warm);
  font-size: 0.82rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-weight: 700;
  color: var(--accent-orange-deep);
}

.console-dots {
  display: flex;
  gap: 7px;
}

.console-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background: #f87171; }
.dot-yellow { background: #fbbf24; }
.dot-green { background: #34d399; }

.console-tabs {
  display: flex;
  background: #f8fafc;
  border-bottom: 1px solid var(--border-light);
  padding: 6px 8px 0;
  gap: 4px;
}

.console-tab-btn {
  flex: 1;
  background: none;
  border: none;
  padding: 10px 8px;
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.console-tab-btn:hover {
  color: var(--accent-orange);
  background: #fff7ed;
}

.console-tab-btn.is-active {
  color: var(--accent-orange-deep);
  background: #ffffff;
  border-top: 2px solid var(--accent-orange);
  box-shadow: 0 -2px 8px rgba(249, 115, 22, 0.08);
}

.console-body {
  padding: 24px;
}

.console-live-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
  border: 1px solid var(--border-warm);
  border-radius: var(--radius-md);
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
}

.live-hero-left {
  position: relative;
  z-index: 1;
}

.live-hero-node-title {
  display: block;
  font-weight: 800;
  color: var(--text-main);
  font-size: 1.18rem;
  margin-bottom: 3px;
}

.live-hero-node-route {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.live-hero-right {
  position: relative;
  z-index: 1;
  text-align: right;
}

.live-ping-val {
  font-size: 1.95rem;
  font-weight: 900;
  color: var(--accent-orange-deep);
  font-family: ui-monospace, monospace;
  display: block;
  line-height: 1.1;
}

.live-ping-sub {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-orange);
}

.console-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  background: #f8fafc;
  margin-bottom: 10px;
  border: 1px solid var(--border-light);
  transition: all var(--transition-fast);
}

.console-row:hover {
  background: #fff7ed;
  border-color: var(--border-warm);
}

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

.route-name {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
  font-weight: 700;
}

.route-state {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.route-stat {
  font-family: ui-monospace, monospace;
  color: var(--accent-orange-deep);
  font-weight: 800;
}

/* ===================================================================
   通用区块样式
   =================================================================== */
.section {
  padding: 84px 0;
  position: relative;
  overflow: hidden;
}

.section-alt {
  background-color: rgba(255, 255, 255, 0.75);
  border-top: 1px solid var(--border-warm);
  border-bottom: 1px solid var(--border-warm);
}

.section-bg-deco {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1440px;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  opacity: 0.55;
  z-index: 0;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
  position: relative;
  z-index: 1;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--accent-orange-deep);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
  text-transform: uppercase;
  background: var(--bg-warm-subtle);
  padding: 5px 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-warm);
}

.section-title {
  font-size: 2.35rem;
  margin-bottom: 16px;
  color: #0f172a;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===================================================================
   矩阵模块 (Matrix - 流媒体与 AI 支持)
   =================================================================== */
.matrix-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  position: relative;
  z-index: 1;
}

.matrix-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 34px;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.matrix-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-orange);
}

.matrix-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.matrix-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.icon-wrap-purple {
  background: #f5f3ff;
  color: #7c3aed;
  border: 1px solid rgba(124, 58, 237, 0.15);
}

.icon-wrap-orange {
  background: #fff7ed;
  color: #ea580c;
  border: 1px solid var(--border-warm);
}

.matrix-title {
  font-size: 1.35rem;
  color: var(--text-main);
  font-weight: 800;
}

.matrix-desc {
  color: var(--text-body);
  font-size: 0.96rem;
  margin-bottom: 24px;
  line-height: 1.68;
}

.matrix-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.matrix-pill {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  background: #f8fafc;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-full);
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.matrix-pill:hover {
  background: var(--bg-warm-subtle);
  border-color: var(--accent-orange);
  color: var(--accent-orange-deep);
}

/* ===================================================================
   特性模块 (Features - 4 Cards)
   =================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
  z-index: 1;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-orange);
}

.feature-idx {
  font-size: 0.78rem;
  font-family: ui-monospace, monospace;
  font-weight: 800;
  color: var(--accent-orange-deep);
  margin-bottom: 14px;
}

.feature-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.icon-box-orange { background: #fff7ed; color: #ea580c; border: 1px solid var(--border-warm); }
.icon-box-emerald { background: #ecfdf5; color: #059669; border: 1px solid rgba(5, 150, 105, 0.15); }
.icon-box-blue { background: #eff6ff; color: #2563eb; border: 1px solid rgba(37, 99, 235, 0.15); }
.icon-box-amber { background: #fffbeb; color: #d97706; border: 1px solid rgba(217, 119, 6, 0.15); }

.feature-title {
  font-size: 1.22rem;
  margin-bottom: 12px;
  color: var(--text-main);
  font-weight: 800;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.65;
}

/* ===================================================================
   使用场景卡 (Usage Scenarios - 3 Cards)
   =================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  position: relative;
  z-index: 1;
}

.scenario-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-orange);
}

.scenario-badge {
  align-self: flex-start;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  background: var(--bg-warm-subtle);
  color: var(--accent-orange-deep);
  border: 1px solid var(--border-warm);
  margin-bottom: 16px;
}

.scenario-title {
  font-size: 1.35rem;
  margin-bottom: 10px;
  font-weight: 800;
  color: var(--text-main);
}

.scenario-devices {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent-orange-deep);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.scenario-desc {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.7;
}

/* ===================================================================
   优势解析 (Benefits - 3 Columns)
   =================================================================== */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  position: relative;
  z-index: 1;
}

.benefit-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 32px 26px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.benefit-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-orange);
}

.benefit-card h3 {
  font-size: 1.25rem;
  margin-bottom: 14px;
  color: var(--text-main);
  font-weight: 800;
}

.benefit-card p {
  font-size: 0.94rem;
  color: var(--text-body);
  line-height: 1.7;
}

/* ===================================================================
   定价模块 (Pricing - 3 Tiers, 中档落日高光突出)
   =================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
  position: relative;
  z-index: 1;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 38px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.pricing-card.is-popular {
  border: 2px solid var(--accent-orange);
  background: linear-gradient(180deg, #fff7ed 0%, #ffffff 100%);
  transform: scale(1.03);
  box-shadow: 0 16px 40px rgba(249, 115, 22, 0.20);
}

.pricing-card.is-popular:hover {
  transform: scale(1.03) translateY(-4px);
  box-shadow: 0 22px 48px rgba(249, 115, 22, 0.28);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 5px 20px;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  box-shadow: 0 4px 14px rgba(234, 88, 12, 0.4);
}

.pricing-plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--text-main);
}

.pricing-plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-light);
}

.price-currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-orange-deep);
}

.price-number {
  font-size: 2.85rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

.pricing-features-list {
  list-style: none;
  padding: 0;
  margin: 0 0 32px 0;
  flex: 1;
}

.pricing-features-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-body);
  margin-bottom: 14px;
}

.pricing-features-list li svg {
  flex-shrink: 0;
  color: var(--accent-orange);
}

/* ===================================================================
   FAQ 模块 (手风琴)
   =================================================================== */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--accent-orange);
  box-shadow: var(--shadow-warm-md);
}

.faq-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.08rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
}

.faq-icon {
  transition: transform var(--transition-fast);
  color: var(--accent-orange);
  flex-shrink: 0;
}

.faq-item.is-open .faq-icon {
  transform: rotate(180deg);
}

.faq-content {
  display: none;
  padding: 0 24px 22px 24px;
  color: var(--text-body);
  font-size: 0.98rem;
  line-height: 1.75;
}

.faq-item.is-open .faq-content {
  display: block;
}

/* ===================================================================
   Final CTA
   =================================================================== */
.final-cta-section {
  padding: 88px 0;
  background: linear-gradient(135deg, #ea580c 0%, #f97316 40%, #0284c7 100%);
  color: #ffffff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.final-cta-box {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.final-cta-title {
  font-size: 2.5rem;
  margin-bottom: 18px;
  color: #ffffff;
  font-weight: 900;
}

.final-cta-desc {
  font-size: 1.18rem;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 34px;
}

/* ===================================================================
   移动端吸底 CTA (Mobile Sticky CTA)
   =================================================================== */
.mobile-sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border-warm);
  padding: 12px 20px;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 -4px 18px rgba(249, 115, 22, 0.12);
}

.sticky-info {
  display: flex;
  flex-direction: column;
}

.sticky-title {
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--text-main);
}

.sticky-sub {
  font-size: 0.75rem;
  color: var(--accent-orange-deep);
  font-weight: 600;
}

/* ===================================================================
   Footer 底部
   =================================================================== */
.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--border-warm);
  padding: 64px 0 36px;
  margin-top: auto;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 44px;
}

.footer-brand {
  max-width: 340px;
}

.footer-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 14px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 1rem;
  color: var(--text-main);
  font-weight: 800;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-body);
  font-size: 0.9rem;
  font-weight: 600;
}

.footer-links a:hover {
  color: var(--accent-orange);
}

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-disclaimer-snippet {
  max-width: 680px;
  line-height: 1.6;
}

/* ===================================================================
   内容页排版 (Guides, Articles, Policies)
   =================================================================== */
.page-header {
  padding: 52px 0 36px;
  border-bottom: 1px solid var(--border-warm);
  margin-bottom: 44px;
  position: relative;
  z-index: 1;
}

.breadcrumbs {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

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

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

.breadcrumbs span {
  margin: 0 8px;
}

.page-title {
  font-size: 2.35rem;
  margin-bottom: 14px;
  color: var(--text-main);
}

.page-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 44px;
  position: relative;
  z-index: 1;
}

.article-content {
  color: var(--text-body);
  font-size: 1.05rem;
  line-height: 1.85;
}

.article-content h1 {
  font-size: 2.2rem;
  margin: 2rem 0 1.2rem;
}

.article-content h2 {
  font-size: 1.6rem;
  margin: 2.4rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-warm);
  color: var(--text-main);
}

.article-content h3 {
  font-size: 1.28rem;
  margin: 1.8rem 0 0.8rem;
  color: var(--text-main);
}

.article-content p {
  margin-bottom: 1.4rem;
}

.article-lead {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-main);
  background: var(--bg-warm-subtle);
  border-left: 4px solid var(--accent-orange);
  padding: 18px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 2.2rem;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 2rem 0;
  background: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-medium);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
  text-align: left;
}

.article-table th {
  background: #fff7ed;
  color: var(--text-main);
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-warm);
}

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

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

.article-table tr:hover td {
  background: #fff7ed;
}

.article-cta-box {
  background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
  border: 1px solid var(--border-warm);
  border-radius: var(--radius-xl);
  padding: 36px 30px;
  text-align: center;
  margin: 3rem 0;
  box-shadow: var(--shadow-warm-md);
}

.article-cta-box h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
  color: var(--text-main);
}

.article-cta-box p {
  color: var(--text-body);
  max-width: 560px;
  margin: 0 auto 24px;
}

.article-faq-section {
  background: #ffffff;
  border: 1px solid var(--border-warm);
  border-radius: var(--radius-xl);
  padding: 28px;
  margin: 2.8rem 0;
  box-shadow: var(--shadow-sm);
}

.article-faq-section h3 {
  margin-top: 0;
  margin-bottom: 20px;
  color: var(--text-main);
}

.article-faq-item {
  margin-bottom: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-light);
}

.article-faq-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.article-faq-q {
  font-weight: 800;
  color: var(--text-main);
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.article-faq-a {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.7;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sidebar-widget {
  background: #ffffff;
  border: 1px solid var(--border-warm);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.sidebar-title {
  font-size: 1.05rem;
  color: var(--text-main);
  font-weight: 800;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

.sidebar-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-links li {
  margin-bottom: 12px;
}

.sidebar-links a {
  color: var(--text-body);
  font-size: 0.92rem;
  display: block;
}

.sidebar-links a:hover {
  color: var(--accent-orange);
}

.policy-content {
  max-width: 880px;
  margin: 0 auto 64px;
  background: #ffffff;
  border: 1px solid var(--border-warm);
  border-radius: var(--radius-xl);
  padding: 44px;
  box-shadow: var(--shadow-warm-md);
  position: relative;
  z-index: 1;
}

.policy-content h2 {
  font-size: 1.45rem;
  margin: 2rem 0 1rem;
  color: var(--text-main);
}

.policy-content p {
  color: var(--text-body);
  margin-bottom: 1.2rem;
  font-size: 1rem;
}

/* ===================================================================
   响应式断点适配
   =================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
  .pricing-card.is-popular {
    transform: none;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-desktop, .header-status-pill {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-indicators {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
  .matrix-grid {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
  .benefits-grid {
    grid-template-columns: 1fr;
  }
  body {
    padding-bottom: 64px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 14px;
    text-align: center;
  }
  .policy-content {
    padding: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}