/* ==========================================================================
   SSR Dog 官方网站 - 核心视觉与动态样式表
   Visual Style: Wine-red Typography with Dynamic Movement & Rich Accents
   Color Palette:
     Base White:      #FFFFFF
     Deep Wine:       #692F42
     Vibrant Wine:    #8E3853
     Warm Black:      #2F2A2C
     Pale Blush:      #F4ECEF
     Blush Subtle:    #FAF6F8
     Champagne Gold:  #C59B27
     Emerald Green:   #10B981
     Azure Blue:      #2563EB
     Amethyst Violet: #7C3AED
     Amber Coral:     #D97706
     Teal Cyan:       #0D9488
   ========================================================================== */

:root {
  /* 基础品牌主色 */
  --color-white: #FFFFFF;
  --color-wine: #692F42;
  --color-wine-dark: #502131;
  --color-wine-light: #8E3853;
  --color-crimson: #B83B5E;
  --color-black: #2F2A2C;
  --color-blush: #F4ECEF;
  --color-blush-subtle: #FAF6F8;
  --color-cream: #FFFDF9;
  --color-muted: #6B6265;

  /* 丰富重色与高亮辅助色 (More Colors) */
  --color-gold: #C59B27;
  --color-gold-dark: #92400E;
  --color-gold-bg: rgba(197, 155, 39, 0.12);
  --color-gold-border: rgba(197, 155, 39, 0.35);

  --color-emerald: #10B981;
  --color-emerald-dark: #059669;
  --color-emerald-bg: rgba(16, 185, 129, 0.12);
  --color-emerald-border: rgba(16, 185, 129, 0.32);

  --color-azure: #2563EB;
  --color-azure-bg: rgba(37, 99, 235, 0.1);
  --color-azure-border: rgba(37, 99, 235, 0.3);

  --color-violet: #7C3AED;
  --color-violet-bg: rgba(124, 58, 237, 0.1);
  --color-violet-border: rgba(124, 58, 237, 0.3);

  --color-amber: #D97706;
  --color-amber-bg: rgba(217, 119, 6, 0.12);
  --color-amber-border: rgba(217, 119, 6, 0.32);

  --color-teal: #0D9488;
  --color-teal-bg: rgba(13, 148, 136, 0.1);
  --color-teal-border: rgba(13, 148, 136, 0.3);

  /* 边框标准 */
  --color-border-wine: rgba(105, 47, 66, 0.22);
  --color-border-subtle: rgba(47, 42, 44, 0.12);
  --color-border-strong: rgba(105, 47, 66, 0.45);

  /* 字体规范 */
  --font-serif: "Songti SC", "SimSun", "Noto Serif CJK SC", "STSong", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;

  --font-size-base: 16px;
  --line-height-base: 1.75;
  --max-width: 1200px;
  --max-width-narrow: 840px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --transition-fast: 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  background-color: var(--color-white);
  color: var(--color-black);
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: var(--line-height-base);
  color: var(--color-black);
  background-color: var(--color-white);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* 标题字体规范：主要大标题使用中文衬线体，正文使用现代系统无衬线 */
h1, h2, h3, .serif-heading {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--color-black);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h1 {
  font-size: 63px; /* Desktop specification */
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: 34px;
  margin-bottom: 1rem;
}

h3 {
  font-size: 22px;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1.25rem;
  overflow-wrap: anywhere;
}

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

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

a:hover {
  color: var(--color-wine-light);
}

/* 容器通用规范 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.container-narrow {
  max-width: var(--max-width-narrow);
}

/* 意向性留白与视觉停顿 */
.section-pause {
  padding-top: 80px;
  padding-bottom: 80px;
  position: relative;
}

.section-pause-lg {
  padding-top: 100px;
  padding-bottom: 100px;
  position: relative;
}

.bg-blush {
  background-color: var(--color-blush);
}

.bg-blush-subtle {
  background-color: var(--color-blush-subtle);
}

.bg-white {
  background-color: var(--color-white);
}

/* ==========================================================================
   动态效果与微交互 (Dynamic Movement Animations)
   ========================================================================== */

/* 1. 单条下划线扫动动画 (Underline Sweep) */
.sweep-underline {
  position: relative;
  display: inline-block;
}

.sweep-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-wine) 0%, var(--color-wine-light) 60%, var(--color-gold) 100%);
  transform-origin: left center;
  animation: underlineSweep 1.3s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  border-radius: 2px;
}

@keyframes underlineSweep {
  0% {
    transform: scaleX(0);
    opacity: 0;
  }
  30% {
    opacity: 1;
  }
  100% {
    transform: scaleX(1);
    opacity: 1;
  }
}

/* 2. 状态点绿光呼吸波纹 (Live Status Ripple) */
@keyframes statusRipple {
  0% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.65);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

/* 3. 数据流虚线穿梭 (Flowing Data Stream) */
@keyframes flowDash {
  to {
    stroke-dashoffset: -32;
  }
}

/* 4. 仪表盘动态扫描光 (Subtle Scanning Beam) */
@keyframes scanBeam {
  0% {
    transform: translateY(-100%);
    opacity: 0;
  }
  20% {
    opacity: 0.5;
  }
  80% {
    opacity: 0.5;
  }
  100% {
    transform: translateY(280px);
    opacity: 0;
  }
}

/* 5. 减弱动态支持 (Reduced Motion Support) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
    scroll-behavior: auto !important;
  }
  .sweep-underline::after {
    animation: none !important;
    transform: scaleX(1) !important;
  }
  .status-dot {
    animation: none !important;
  }
  .stream-pulse-line {
    animation: none !important;
  }
}

/* ==========================================================================
   按钮与交互控件
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
  line-height: 1.4;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-wine) 0%, var(--color-wine-dark) 100%);
  color: var(--color-white);
  border-color: var(--color-wine);
  box-shadow: 0 4px 12px rgba(105, 47, 66, 0.18);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-wine-light) 0%, var(--color-wine) 100%);
  border-color: var(--color-wine-light);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(105, 47, 66, 0.28);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-black);
  border-color: var(--color-border-strong);
}

.btn-secondary:hover {
  background-color: var(--color-blush);
  color: var(--color-wine);
  border-color: var(--color-wine);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(47, 42, 44, 0.08);
}

.btn svg, .btn .btn-arrow {
  transition: transform var(--transition-fast);
}

.btn:hover svg, .btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* 标签与徽章 */
.editorial-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-wine);
  background: linear-gradient(135deg, var(--color-blush) 0%, var(--color-blush-subtle) 100%);
  border: 1px solid var(--color-border-wine);
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 1rem;
}

.editorial-badge::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-gold);
}

/* ==========================================================================
   顶部导航栏 (Header)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-wine);
  box-shadow: 0 2px 10px rgba(105, 47, 66, 0.03);
}

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

.brand-logo {
  display: flex;
  align-items: baseline;
  gap: 6px;
  color: var(--color-black);
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-logo span.wine-dot {
  color: var(--color-wine);
}

.brand-tagline {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--color-gold-dark);
  background-color: var(--color-gold-bg);
  border: 1px solid var(--color-gold-border);
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
  margin-left: 4px;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-black);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-wine);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-wine) 0%, var(--color-gold) 100%);
  transition: width var(--transition-fast);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 移动端汉堡菜单按钮 */
.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border-wine);
  border-radius: var(--radius-sm);
  padding: 8px;
  cursor: pointer;
  color: var(--color-black);
  transition: all var(--transition-fast);
}

.mobile-toggle:hover {
  background-color: var(--color-blush);
  border-color: var(--color-wine);
}

.mobile-toggle svg {
  display: block;
  width: 22px;
  height: 22px;
  stroke: var(--color-black);
}

/* 移动端抽屉菜单 */
.mobile-drawer {
  display: none;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border-wine);
  padding: 16px 24px 24px;
}

.mobile-drawer.open {
  display: block;
  animation: slideDrawer 0.25s ease-out;
}

@keyframes slideDrawer {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.mobile-nav-list a {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-black);
  padding: 8px 0;
  border-bottom: 1px solid var(--color-blush);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.mobile-nav-list a:hover {
  color: var(--color-wine);
  padding-left: 6px;
}

/* ==========================================================================
   Hero 主视觉区 (Hero Section)
   ========================================================================== */
.hero-section {
  padding-top: 60px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--color-border-wine);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.hero-copy {
  display: flex;
  flex-direction: column;
}

.hero-lead {
  font-size: 1.15rem;
  line-height: 1.85;
  color: var(--color-muted);
  margin-bottom: 2rem;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.hero-notes {
  display: flex;
  gap: 20px;
  font-size: 0.86rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-border-subtle);
  padding-top: 1.25rem;
  flex-wrap: wrap;
}

.hero-notes span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-notes-wine {
  color: var(--color-wine);
  font-weight: 700;
}

/* 右侧网络仪表盘 (Right Network Dashboard with Dynamic Stream) */
.hero-dashboard {
  background: linear-gradient(160deg, #FFFFFF 0%, var(--color-blush-subtle) 100%);
  border: 1px solid var(--color-border-wine);
  border-radius: var(--radius-sm);
  padding: 32px;
  position: relative;
  box-shadow: 0 16px 36px rgba(105, 47, 66, 0.06);
  overflow: hidden;
}

.dashboard-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 16px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--color-border-wine);
}

.dashboard-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-wine);
  display: flex;
  align-items: center;
  gap: 8px;
}

.dashboard-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-emerald-dark);
  background-color: var(--color-emerald-bg);
  border: 1px solid var(--color-emerald-border);
  padding: 4px 10px;
  border-radius: 14px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-emerald);
  animation: statusRipple 2s infinite ease-out;
}

/* 动态波形与连接流 (Data Stream SVG Linework) */
.dashboard-flow-line {
  width: 100%;
  height: 28px;
  margin: 10px 0 18px;
  display: block;
}

.stream-pulse-line {
  stroke: url(#flowGrad);
  stroke-width: 2.2;
  stroke-dasharray: 8 6;
  animation: flowDash 1.2s linear infinite;
}

/* 细线与大号区域标签 (Network Matrix) */
.network-matrix {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.network-region {
  border: 1px solid var(--color-border-wine);
  background-color: var(--color-white);
  padding: 16px;
  position: relative;
  transition: all var(--transition-normal);
  border-radius: 2px;
}

.network-region:hover {
  transform: translateY(-3px);
  border-color: var(--color-wine);
  box-shadow: 0 8px 20px rgba(105, 47, 66, 0.08);
}

.region-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.region-code {
  font-family: var(--font-serif);
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--color-black);
  line-height: 1;
}

/* 延迟多彩徽章 (Ping Status Pills) */
.ping-pill {
  font-family: monospace;
  font-size: 0.74rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.ping-green {
  background-color: var(--color-emerald-bg);
  color: var(--color-emerald-dark);
  border: 1px solid var(--color-emerald-border);
}

.ping-amber {
  background-color: var(--color-amber-bg);
  color: var(--color-amber);
  border: 1px solid var(--color-amber-border);
}

.region-name {
  font-size: 0.82rem;
  color: var(--color-muted);
  display: block;
}

.region-rule {
  margin-top: 10px;
  height: 2px;
  background-color: var(--color-blush);
  position: relative;
}

.region-rule::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 45%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-wine) 0%, var(--color-gold) 100%);
  transition: width var(--transition-normal);
}

.network-region:hover .region-rule::after {
  width: 85%;
}

.dashboard-linework {
  border-top: 1px solid var(--color-border-wine);
  padding-top: 18px;
}

.linework-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--color-muted);
  margin-bottom: 8px;
}

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

.linework-label {
  font-weight: 500;
  color: var(--color-black);
}

.linework-val {
  font-family: monospace;
  color: var(--color-wine);
  font-weight: 600;
}

.dashboard-disclaimer {
  margin-top: 16px;
  font-size: 0.72rem;
  color: var(--color-muted);
  line-height: 1.4;
  border-top: 1px dashed var(--color-border-subtle);
  padding-top: 10px;
}

/* ==========================================================================
   核心优势：大型引言式特性陈述
   ========================================================================== */
.section-header {
  margin-bottom: 48px;
}

.section-header.text-center {
  text-align: center;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

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

.quote-statement {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  line-height: 1.45;
  color: var(--color-black);
  padding-left: 28px;
  border-left: 4px solid var(--color-wine);
  margin-bottom: 3rem;
  background: linear-gradient(90deg, var(--color-blush) 0%, rgba(244, 236, 239, 0.4) 60%, transparent 100%);
  padding-top: 20px;
  padding-bottom: 20px;
  padding-right: 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

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

.benefit-card {
  border: 1px solid var(--color-border-wine);
  background-color: var(--color-white);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
  border-radius: var(--radius-sm);
}

.benefit-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-wine);
  box-shadow: 0 14px 30px rgba(105, 47, 66, 0.08);
}

.benefit-num {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-wine);
  margin-bottom: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.benefit-num::after {
  content: "";
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--color-gold);
}

.benefit-card h3 {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.benefit-card p {
  font-size: 0.95rem;
  color: var(--color-muted);
  line-height: 1.75;
}

/* ==========================================================================
   紧凑节点矩阵 (Compact Node Matrix with Dynamic Status)
   ========================================================================== */
.nodes-matrix-wrapper {
  background-color: var(--color-white);
  border: 1px solid var(--color-border-wine);
  padding: 36px;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 16px rgba(105, 47, 66, 0.03);
}

.nodes-matrix-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.node-matrix-item {
  border: 1px solid var(--color-border-wine);
  background-color: var(--color-blush-subtle);
  padding: 22px 20px;
  transition: all var(--transition-normal);
  border-radius: var(--radius-sm);
  position: relative;
}

.node-matrix-item:hover {
  border-color: var(--color-wine);
  background-color: var(--color-white);
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(105, 47, 66, 0.09);
}

.node-matrix-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.node-matrix-flag {
  font-size: 1.35rem;
  display: inline-block;
}

.matrix-status-pill {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 12px;
}

.status-green {
  background-color: var(--color-emerald-bg);
  color: var(--color-emerald-dark);
  border: 1px solid var(--color-emerald-border);
}

.status-amber {
  background-color: var(--color-amber-bg);
  color: var(--color-amber);
  border: 1px solid var(--color-amber-border);
}

.node-matrix-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 4px;
}

.node-matrix-tech {
  font-size: 0.82rem;
  color: var(--color-wine);
  font-weight: 600;
  margin-bottom: 8px;
}

.node-matrix-desc {
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.55;
}

.nodes-disclaimer-box {
  border-top: 1px solid var(--color-border-wine);
  padding-top: 16px;
  font-size: 0.82rem;
  color: var(--color-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   双独立 AI 与流媒体面板 (Two Distinct Panels with Brand Colors)
   ========================================================================== */
.usecases-panels-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

.usecase-panel {
  border: 1px solid var(--color-border-wine);
  background-color: var(--color-white);
  padding: 40px 34px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  border-radius: var(--radius-sm);
}

.usecase-panel:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(105, 47, 66, 0.08);
}

.usecase-panel.panel-ai {
  border-top: 4px solid var(--color-wine);
  background: linear-gradient(180deg, var(--color-white) 0%, rgba(244, 236, 239, 0.25) 100%);
}

.usecase-panel.panel-streaming {
  border-top: 4px solid var(--color-crimson);
  background: linear-gradient(180deg, var(--color-white) 0%, rgba(255, 245, 247, 0.35) 100%);
}

.panel-tag {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: inline-block;
}

.panel-ai .panel-tag {
  color: var(--color-wine);
}

.panel-streaming .panel-tag {
  color: var(--color-crimson);
}

.usecase-panel h3 {
  font-size: 1.6rem;
  margin-bottom: 16px;
}

.usecase-panel .panel-desc {
  font-size: 0.96rem;
  color: var(--color-muted);
  line-height: 1.75;
  margin-bottom: 24px;
}

.usecase-tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

/* 品牌微色彩标签与悬浮动态 (Brand Color Pills with Micro Movement) */
.usecase-pill {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 4px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: default;
}

.usecase-pill:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.07);
}

/* AI 平台品牌色彩 */
.pill-chatgpt {
  background-color: rgba(16, 163, 127, 0.1);
  color: #0d8a6a;
  border: 1px solid rgba(16, 163, 127, 0.35);
}

.pill-claude {
  background-color: rgba(201, 100, 66, 0.12);
  color: #b45309;
  border: 1px solid rgba(201, 100, 66, 0.35);
}

.pill-gemini {
  background-color: rgba(37, 99, 235, 0.1);
  color: #1d4ed8;
  border: 1px solid rgba(37, 99, 235, 0.35);
}

.pill-aistudio {
  background-color: rgba(99, 102, 241, 0.1);
  color: #4338ca;
  border: 1px solid rgba(99, 102, 241, 0.35);
}

.pill-perplexity {
  background-color: rgba(13, 148, 136, 0.1);
  color: #0f766e;
  border: 1px solid rgba(13, 148, 136, 0.35);
}

.pill-cursor {
  background-color: rgba(124, 58, 237, 0.1);
  color: #6d28d9;
  border: 1px solid rgba(124, 58, 237, 0.35);
}

/* 流媒体品牌色彩 */
.pill-youtube {
  background-color: rgba(220, 38, 38, 0.1);
  color: #b91c1c;
  border: 1px solid rgba(220, 38, 38, 0.35);
}

.pill-netflix {
  background-color: rgba(229, 9, 20, 0.1);
  color: #dc2626;
  border: 1px solid rgba(229, 9, 20, 0.35);
}

.pill-disney {
  background-color: rgba(37, 99, 235, 0.1);
  color: #1e40af;
  border: 1px solid rgba(37, 99, 235, 0.35);
}

.pill-spotify {
  background-color: rgba(16, 185, 129, 0.12);
  color: #047857;
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.pill-twitch {
  background-color: rgba(147, 51, 234, 0.1);
  color: #7e22ce;
  border: 1px solid rgba(147, 51, 234, 0.35);
}

.panel-rule-box {
  margin-top: auto;
  border-top: 1px solid var(--color-border-wine);
  padding-top: 18px;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.panel-rule-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px dashed var(--color-blush);
}

/* ==========================================================================
   套餐定价栏 (Precise Columns with Wine-Gold Rules & Recommended Focus)
   ========================================================================== */
.pricing-matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pricing-column {
  border: 1px solid var(--color-border-wine);
  background-color: var(--color-white);
  padding: 36px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
  border-radius: var(--radius-sm);
}

.pricing-column:hover {
  border-color: var(--color-wine);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(105, 47, 66, 0.08);
}

/* 推荐套餐唯一标识 (Exactly one visible "推荐套餐") */
.pricing-column.recommended {
  border: 2px solid var(--color-wine);
  background: linear-gradient(180deg, #FFFFFF 0%, #FAF4F6 100%);
  transform: translateY(-6px);
  box-shadow: 0 16px 36px rgba(105, 47, 66, 0.12), 0 0 0 1px rgba(197, 155, 39, 0.35);
}

.pricing-column.recommended:hover {
  transform: translateY(-9px);
  box-shadow: 0 20px 42px rgba(105, 47, 66, 0.18), 0 0 0 1px rgba(197, 155, 39, 0.5);
}

.recommended-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--color-wine) 0%, var(--color-wine-light) 100%);
  color: var(--color-white);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 16px;
  border-radius: 12px;
  text-transform: uppercase;
  white-space: nowrap;
  border: 1px solid var(--color-gold);
  box-shadow: 0 4px 12px rgba(105, 47, 66, 0.25);
}

.plan-head {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border-wine);
  margin-bottom: 24px;
}

.plan-tier-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 6px;
}

.plan-tier-desc {
  font-size: 0.82rem;
  color: var(--color-muted);
  line-height: 1.4;
}

.plan-price-wrap {
  margin-top: 14px;
}

.plan-currency {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-wine);
}

.plan-amount {
  font-family: var(--font-serif);
  font-size: 2.3rem;
  font-weight: 700;
  color: var(--color-black);
}

.pricing-column.recommended .plan-amount {
  color: var(--color-wine-dark);
}

.plan-period {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.plan-features-list {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-features-list li {
  font-size: 0.88rem;
  color: var(--color-black);
  padding: 10px 0;
  border-bottom: 1px solid var(--color-blush);
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.plan-features-list li::before {
  content: "—";
  color: var(--color-wine);
  font-weight: bold;
}

.pricing-column.recommended .plan-features-list li::before {
  content: "✓";
  color: var(--color-emerald-dark);
  font-weight: bold;
}

.pricing-column .btn {
  width: 100%;
}

.plan-placeholder-note {
  font-size: 0.72rem;
  color: var(--color-muted);
  text-align: center;
  margin-top: 10px;
}

/* ==========================================================================
   文章目录 (Article Directory with Colorful Category Badges & Card Hover Motion)
   ========================================================================== */
.articles-directory-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card-item {
  border: 1px solid var(--color-border-wine);
  background-color: var(--color-white);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  border-radius: var(--radius-sm);
  position: relative;
}

.article-card-item:hover {
  border-color: var(--color-wine);
  background-color: var(--color-white);
  transform: translateY(-5px);
  box-shadow: 0 14px 30px rgba(105, 47, 66, 0.08);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--color-muted);
  margin-bottom: 12px;
}

/* 多彩文章分类徽章 (More Colors Category Badges) */
.article-category {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 10px;
  display: inline-block;
}

.cat-wine {
  background-color: rgba(105, 47, 66, 0.1);
  color: #692F42;
  border: 1px solid rgba(105, 47, 66, 0.25);
}

.cat-gold {
  background-color: var(--color-gold-bg);
  color: var(--color-gold-dark);
  border: 1px solid var(--color-gold-border);
}

.cat-blue {
  background-color: var(--color-azure-bg);
  color: var(--color-azure);
  border: 1px solid var(--color-azure-border);
}

.cat-purple {
  background-color: var(--color-violet-bg);
  color: var(--color-violet);
  border: 1px solid var(--color-violet-border);
}

.cat-emerald {
  background-color: var(--color-emerald-bg);
  color: var(--color-emerald-dark);
  border: 1px solid var(--color-emerald-border);
}

.cat-orange {
  background-color: rgba(234, 88, 12, 0.1);
  color: #C2410C;
  border: 1px solid rgba(234, 88, 12, 0.25);
}

.cat-teal {
  background-color: var(--color-teal-bg);
  color: var(--color-teal);
  border: 1px solid var(--color-teal-border);
}

.cat-crimson {
  background-color: rgba(225, 29, 72, 0.1);
  color: #BE123C;
  border: 1px solid rgba(225, 29, 72, 0.25);
}

.cat-amber {
  background-color: var(--color-amber-bg);
  color: var(--color-amber);
  border: 1px solid var(--color-amber-border);
}

.article-card-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  line-height: 1.4;
  margin-bottom: 12px;
}

.article-card-title a {
  color: var(--color-black);
  transition: color var(--transition-fast);
}

.article-card-title a:hover {
  color: var(--color-wine);
}

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-footer {
  border-top: 1px solid var(--color-border-wine);
  padding-top: 14px;
}

.article-read-btn {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-wine);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-fast);
}

.article-read-btn:hover {
  gap: 8px;
  text-decoration: underline;
}

/* ==========================================================================
   真实或样本用户评价 (Testimonials with Subtle Tint)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  border: 1px solid var(--color-border-wine);
  background-color: var(--color-white);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  border-radius: var(--radius-sm);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-wine);
  box-shadow: 0 12px 28px rgba(105, 47, 66, 0.07);
}

.testimonial-quote {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-black);
  margin-bottom: 20px;
  flex-grow: 1;
  position: relative;
}

.testimonial-author {
  border-top: 1px solid var(--color-border-wine);
  padding-top: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.author-name {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--color-black);
}

.author-role {
  font-size: 0.78rem;
  color: var(--color-muted);
}

.testimonial-sample-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-gold-dark);
  background-color: var(--color-gold-bg);
  border: 1px solid var(--color-gold-border);
  padding: 2px 8px;
  border-radius: 10px;
}

/* ==========================================================================
   常见问题解答 (FAQ Accordion with Smooth Expansion)
   ========================================================================== */
.faq-accordion-wrap {
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
}

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

.faq-item:first-child {
  border-top: 1px solid var(--color-border-wine);
}

.faq-item.active {
  background-color: rgba(244, 236, 239, 0.3);
}

.faq-question-btn {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 22px 10px;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-black);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition-fast);
}

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

.faq-icon-cross {
  font-size: 1.35rem;
  color: var(--color-wine);
  transition: transform var(--transition-fast);
  line-height: 1;
}

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

.faq-answer-panel {
  display: none;
  padding: 0 10px 22px;
  font-size: 0.95rem;
  color: var(--color-muted);
  line-height: 1.8;
  animation: faqFade 0.25s ease-out;
}

@keyframes faqFade {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.faq-item.active .faq-answer-panel {
  display: block;
}

/* ==========================================================================
   页脚区域 (Footer)
   ========================================================================== */
.site-footer {
  background: linear-gradient(180deg, var(--color-blush-subtle) 0%, #FFFFFF 100%);
  border-top: 1px solid var(--color-border-wine);
  padding-top: 64px;
  padding-bottom: 40px;
  margin-top: auto;
}

.footer-columns-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-wine);
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.7;
  max-width: 320px;
}

.footer-heading {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-black);
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

.footer-heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 18px;
  height: 2px;
  background-color: var(--color-gold);
}

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

.footer-link-list a {
  font-size: 0.88rem;
  color: var(--color-muted);
  transition: all var(--transition-fast);
}

.footer-link-list a:hover {
  color: var(--color-wine);
  padding-left: 4px;
}

.footer-bottom-bar {
  border-top: 1px solid var(--color-border-wine);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--color-muted);
}

/* 推荐站点外部链接栏 */
.footer-external-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.footer-external-links span.label {
  color: var(--color-black);
  font-weight: 700;
}

.footer-external-links a {
  color: var(--color-wine);
  font-weight: 600;
  transition: color var(--transition-fast);
}

.footer-external-links a:hover {
  color: var(--color-crimson);
  text-decoration: underline;
}

.footer-sep {
  color: var(--color-border-wine);
}

/* ==========================================================================
   文章页面规范 (Article Pages Layout & Typography)
   ========================================================================== */
.article-header {
  padding-top: 50px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--color-border-wine);
}

.breadcrumb-nav {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 20px;
}

.breadcrumb-nav a {
  color: var(--color-muted);
}

.breadcrumb-nav a:hover {
  color: var(--color-wine);
}

.breadcrumb-separator {
  margin: 0 8px;
  color: var(--color-border-subtle);
}

.article-header h1 {
  font-size: 42px;
  line-height: 1.25;
  margin-bottom: 16px;
}

.article-post-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.85rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-border-wine);
  padding-top: 14px;
}

.article-content {
  padding-top: 50px;
  padding-bottom: 60px;
}

.article-content h2 {
  font-size: 28px;
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-wine);
}

.article-content h3 {
  font-size: 20px;
  margin-top: 28px;
  margin-bottom: 12px;
  color: var(--color-wine);
}

.article-content p {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--color-black);
  margin-bottom: 20px;
}

.article-content ul, .article-content ol {
  margin-left: 24px;
  margin-bottom: 24px;
  line-height: 1.8;
}

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

.article-callout {
  background: linear-gradient(135deg, var(--color-blush) 0%, rgba(244, 236, 239, 0.4) 100%);
  border-left: 4px solid var(--color-wine);
  padding: 20px 24px;
  margin: 28px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-callout p:last-child {
  margin-bottom: 0;
}

.article-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--color-border-wine);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 12px rgba(105, 47, 66, 0.03);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  text-align: left;
}

.article-table th {
  background-color: var(--color-blush);
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--color-black);
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border-wine);
}

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

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

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

.article-related-box {
  margin-top: 60px;
  border-top: 1px solid var(--color-border-wine);
  padding-top: 36px;
}

.article-related-box h3 {
  font-size: 1.35rem;
  margin-bottom: 20px;
}

.related-articles-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.related-article-link {
  border: 1px solid var(--color-border-wine);
  background-color: var(--color-blush-subtle);
  padding: 16px 20px;
  display: block;
  transition: all var(--transition-normal);
  border-radius: var(--radius-sm);
}

.related-article-link:hover {
  border-color: var(--color-wine);
  background-color: var(--color-white);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(105, 47, 66, 0.08);
}

.related-article-link span {
  display: block;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 4px;
}

.related-article-link small {
  font-size: 0.8rem;
  color: var(--color-muted);
}

/* ==========================================================================
   响应式断点规范 (Responsive: 1440px / 1024px / 768px / 430px / 390px / 375px)
   ========================================================================== */

/* 1024px 及以下 (Tablet Landscape) */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .usecases-panels-grid {
    grid-template-columns: 1fr;
  }

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

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

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

  .footer-columns-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

/* 768px 及以下 (Tablet Portrait / Large Mobile) */
@media (max-width: 768px) {
  h1 {
    font-size: 44px;
  }

  h2 {
    font-size: 28px;
  }

  .quote-statement {
    font-size: 1.35rem;
    padding-left: 18px;
  }

  .nav-desktop {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .network-matrix {
    grid-template-columns: 1fr 1fr;
  }

  .related-articles-list {
    grid-template-columns: 1fr;
  }
}

/* 430px / 390px / 375px 及以下 (Mobile First Optimization) */
@media (max-width: 480px) {
  h1 {
    font-size: 38px; /* Mobile specification: H1 38px */
    line-height: 1.2;
  }

  h2 {
    font-size: 24px;
  }

  h3 {
    font-size: 19px;
  }

  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section-pause {
    padding-top: 50px;
    padding-bottom: 50px;
  }

  .section-pause-lg {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .hero-dashboard {
    padding: 20px 16px;
  }

  .network-matrix {
    grid-template-columns: 1fr;
  }

  .nodes-matrix-grid {
    grid-template-columns: 1fr;
  }

  .nodes-matrix-wrapper {
    padding: 20px 16px;
  }

  .pricing-matrix {
    grid-template-columns: 1fr;
  }

  .pricing-column.recommended {
    transform: none;
  }

  .articles-directory-grid {
    grid-template-columns: 1fr;
  }

  .footer-columns-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-header h1 {
    font-size: 28px;
  }
}