/* ===================================================================
   渔云 (CloudFisher) - 光学石英水晶奢华设计体系 (Prismatic Optical-Quartz)
   调色盘：纯雪白画布 (#ffffff) · 兰花紫与珊瑚粉色散边缘 (#8b5cf6 -> #f43f5e) · 黑曜石墨文字 (#09090b)
   交互特性：折射石英质感、三维动态倾斜光斑、色散微光束、平滑动态锚点导航
   =================================================================== */

:root {
  /* 白天模式 (Immaculate Crystal Palette) */
  --bg-canvas: #ffffff;
  --bg-canvas-subtle: #fcfcff;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-card-hover: rgba(255, 255, 255, 0.88);
  --bg-quartz-slab: rgba(255, 255, 255, 0.65);
  --bg-pill: rgba(255, 255, 255, 0.85);

  --text-primary: #09090b;       /* 锐利黑曜石墨 */
  --text-secondary: #475569;     /* 雅致深板岩灰 */
  --text-muted: #94a3b8;         /* 柔和石英灰 */
  --text-inverse: #ffffff;

  /* 光学色散梯度 (Orchid-Violet to Coral-Pink Chromatic Dispersion) */
  --chroma-violet: #8b5cf6;
  --chroma-magenta: #ec4899;
  --chroma-coral: #f43f5e;
  --chroma-cyan: #06b6d4;

  --chroma-gradient: linear-gradient(135deg, #8b5cf6 0%, #ec4899 50%, #f43f5e 100%);
  --chroma-gradient-hover: linear-gradient(135deg, #7c3aed 0%, #db2777 50%, #e11d48 100%);
  --chroma-gradient-subtle: linear-gradient(135deg, rgba(139, 92, 246, 0.08) 0%, rgba(244, 63, 94, 0.08) 100%);
  --chroma-border-gradient: linear-gradient(135deg, rgba(139, 92, 246, 0.45) 0%, rgba(236, 72, 153, 0.3) 50%, rgba(244, 63, 94, 0.45) 100%);

  /* 光学水晶边缘与阴影 */
  --quartz-border: rgba(255, 255, 255, 0.85);
  --quartz-border-outer: rgba(139, 92, 246, 0.15);
  --quartz-bevel: inset 0 1px 1px 0 rgba(255, 255, 255, 0.95), inset 0 -1px 2px 0 rgba(139, 92, 246, 0.12);
  --quartz-shadow: 0 4px 20px -2px rgba(139, 92, 246, 0.06), 0 12px 32px -8px rgba(244, 63, 94, 0.08);
  --quartz-shadow-hover: 0 20px 45px -10px rgba(139, 92, 246, 0.2), 0 10px 24px -5px rgba(244, 63, 94, 0.15);

  --badge-popular: linear-gradient(135deg, #f43f5e 0%, #ec4899 100%);
  --badge-green: #10b981;
  --badge-green-bg: rgba(16, 185, 129, 0.12);

  --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.18s ease;
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --max-width: 1240px;
}

/* 夜间模式 (Obsidian Night Crystal Architecture) */
[data-theme="dark"] {
  --bg-canvas: #09090b;
  --bg-canvas-subtle: #0f0f14;
  --bg-card: rgba(18, 18, 24, 0.72);
  --bg-card-hover: rgba(24, 24, 34, 0.88);
  --bg-quartz-slab: rgba(20, 20, 28, 0.65);
  --bg-pill: rgba(25, 25, 35, 0.85);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #09090b;

  --chroma-gradient: linear-gradient(135deg, #a78bfa 0%, #f472b6 50%, #fb7185 100%);
  --chroma-gradient-hover: linear-gradient(135deg, #c084fc 0%, #f472b6 50%, #fda4af 100%);
  --chroma-gradient-subtle: linear-gradient(135deg, rgba(167, 139, 250, 0.14) 0%, rgba(251, 113, 133, 0.14) 100%);
  --chroma-border-gradient: linear-gradient(135deg, rgba(167, 139, 250, 0.5) 0%, rgba(244, 114, 182, 0.35) 50%, rgba(251, 113, 133, 0.5) 100%);

  --quartz-border: rgba(255, 255, 255, 0.12);
  --quartz-border-outer: rgba(167, 139, 250, 0.25);
  --quartz-bevel: inset 0 1px 1px 0 rgba(255, 255, 255, 0.2), inset 0 -1px 2px 0 rgba(0, 0, 0, 0.5);
  --quartz-shadow: 0 8px 30px -4px rgba(0, 0, 0, 0.6), 0 0 20px -2px rgba(139, 92, 246, 0.15);
  --quartz-shadow-hover: 0 25px 50px -12px rgba(0, 0, 0, 0.8), 0 0 35px 2px rgba(236, 72, 153, 0.28);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 85px;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  line-height: 1.65;
  transition: background-color 0.35s ease, color 0.35s ease;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

/* 底层光学石英焦散光网格 (Snell's Law Caustics & Gridlines) */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 18% 12%, rgba(139, 92, 246, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 82% 28%, rgba(244, 63, 94, 0.07) 0%, transparent 45%),
    radial-gradient(circle at 45% 75%, rgba(6, 182, 212, 0.06) 0%, transparent 50%),
    linear-gradient(rgba(139, 92, 246, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 92, 246, 0.025) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 48px 48px, 48px 48px;
  z-index: -2;
  pointer-events: none;
}

[data-theme="dark"] body::before {
  background-image: 
    radial-gradient(circle at 20% 15%, rgba(167, 139, 250, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 80% 30%, rgba(251, 113, 133, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(34, 211, 238, 0.08) 0%, transparent 55%),
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-smooth);
}

img, svg {
  vertical-align: middle;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}

/* ===================================================================
   顶部水晶折射导航栏 (Prismatic Glass Header)
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--bg-quartz-slab);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--quartz-border);
  box-shadow: 0 4px 25px -4px rgba(139, 92, 246, 0.08);
  transition: var(--transition-smooth);
}

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

/* 品牌 Logo */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo-img {
  height: 42px;
  width: auto;
  max-width: 175px;
  display: block;
  object-fit: contain;
  transition: transform 0.28s ease, filter 0.3s ease;
}

.brand:hover .brand-logo-img {
  transform: scale(1.035);
}

[data-theme="dark"] .brand-logo-img {
  filter: drop-shadow(0 0 12px rgba(167, 139, 250, 0.45)) brightness(1.08);
}

/* 导航链接 - 含首页 + 板块锚点 + 推荐资讯 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 6px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0%;
  height: 2px;
  background: var(--chroma-gradient);
  border-radius: 2px;
  transition: width 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 80%;
}

/* 推荐资讯特殊微光胶囊标签 */
.nav-insights-pill {
  background: var(--chroma-gradient-subtle);
  border: 1px solid rgba(236, 72, 153, 0.3);
  padding: 6px 14px !important;
  border-radius: var(--radius-full);
  color: var(--chroma-coral) !important;
  font-weight: 700 !important;
  box-shadow: 0 2px 10px rgba(244, 63, 94, 0.12);
  transition: var(--transition-smooth) !important;
}

.nav-insights-pill:hover {
  background: var(--chroma-gradient);
  color: #ffffff !important;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(244, 63, 94, 0.35);
}

.nav-insights-pill::after {
  display: none !important;
}

.nav-insights-pill .hot-spark {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #f43f5e;
  box-shadow: 0 0 8px #f43f5e;
  animation: pulseSpark 1.6s infinite;
}

@keyframes pulseSpark {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* 头部操作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 光学石英昼夜模式切换按钮 */
.theme-toggle-btn {
  background: var(--bg-quartz-slab);
  border: 1px solid var(--quartz-border);
  color: var(--text-primary);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--quartz-bevel), 0 2px 10px rgba(139, 92, 246, 0.08);
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn:hover {
  border-color: rgba(236, 72, 153, 0.5);
  transform: translateY(-2px) rotate(15deg);
  box-shadow: 0 6px 20px rgba(236, 72, 153, 0.25);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.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 (CTA) 按钮体系 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 26px;
  font-size: 0.96rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-smooth);
  text-align: center;
  border: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

/* 彩虹色散光柱特效 (Chromatic Beam Sweep) */
.btn::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -60%;
  width: 200%;
  height: 200%;
  background: linear-gradient(115deg, transparent 30%, rgba(255, 255, 255, 0.45) 50%, transparent 70%);
  transform: rotate(25deg);
  transition: transform 0.6s ease;
  pointer-events: none;
}

.btn:hover::before {
  transform: rotate(25deg) translate(50%, 50%);
}

.btn-primary {
  background: var(--chroma-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 18px rgba(236, 72, 153, 0.35);
}

.btn-primary:hover {
  background: var(--chroma-gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(244, 63, 94, 0.45);
}

.btn-secondary {
  background: var(--bg-quartz-slab);
  color: var(--text-primary);
  border: 1px solid var(--quartz-border);
  box-shadow: var(--quartz-bevel), var(--quartz-shadow);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: rgba(139, 92, 246, 0.4);
  color: var(--chroma-violet);
  transform: translateY(-2px);
  box-shadow: var(--quartz-shadow-hover);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.08rem;
  letter-spacing: 0.3px;
}

.btn-block {
  width: 100%;
}

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

/* ===================================================================
   主视觉区 (Hero Section) - 光学石英奢华日间
   =================================================================== */
.hero-section {
  position: relative;
  padding: 90px 0 75px;
  text-align: center;
  overflow: hidden;
}

/* 顶部焦散流光光团 */
.hero-caustics-glow {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 520px;
  background: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.16) 0%, rgba(244, 63, 94, 0.12) 40%, transparent 70%);
  filter: blur(80px);
  z-index: -1;
  pointer-events: none;
}

/* 动态石英药丸 */
.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 20px;
  background: var(--bg-quartz-slab);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  box-shadow: var(--quartz-bevel), var(--quartz-shadow);
  margin-bottom: 28px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  animation: floatSubtle 4.5s ease-in-out infinite;
}

.status-dot {
  width: 9px;
  height: 9px;
  background-color: var(--badge-green);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--badge-green-bg);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 9px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

@keyframes floatSubtle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

/* 大标题 - 包含“渔云”并体现“云端垂钓，钓起整个互联网” */
.hero-title {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -1.2px;
  margin-bottom: 22px;
  color: var(--text-primary);
}

.hero-title .brand-accent-text {
  background: var(--chroma-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.22rem;
  color: var(--text-secondary);
  max-width: 780px;
  margin: 0 auto 38px;
  line-height: 1.75;
  font-weight: 450;
}

/* 浮动棱镜胶囊群 (Floating Prismatic Capsules) */
.prismatic-capsules-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 38px;
  flex-wrap: wrap;
}

.prismatic-capsule {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: var(--bg-quartz-slab);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  box-shadow: var(--quartz-bevel), 0 3px 12px rgba(139, 92, 246, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: var(--transition-smooth);
}

.prismatic-capsule:hover {
  transform: translateY(-3px);
  border-color: rgba(244, 63, 94, 0.45);
  box-shadow: 0 6px 20px rgba(236, 72, 153, 0.22);
}

.capsule-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--chroma-gradient);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 52px;
  flex-wrap: wrap;
}

/* 信任背书水晶板 */
.hero-trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  padding: 24px 32px;
  background: var(--bg-quartz-slab);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--quartz-bevel), var(--quartz-shadow);
  max-width: 960px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 0.94rem;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.trust-item svg {
  color: var(--chroma-coral);
  flex-shrink: 0;
}

/* ===================================================================
   公共区块体系
   =================================================================== */
.section {
  padding: 90px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-canvas-subtle);
  border-top: 1px solid var(--quartz-border);
  border-bottom: 1px solid var(--quartz-border);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  padding: 5px 16px;
  background: var(--chroma-gradient-subtle);
  border: 1px solid rgba(139, 92, 246, 0.25);
  color: var(--chroma-violet);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 14px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===================================================================
   折射石英水晶卡片 (Bevel-Cut Refractive Crystal Slabs)
   =================================================================== */
.crystal-slab {
  background: var(--bg-card);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--quartz-bevel), var(--quartz-shadow);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  position: relative;
  overflow: hidden;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.28s ease, border-color 0.28s ease;
  transform-style: preserve-3d;
  will-change: transform;
}

/* 色散边缘折射光晕 */
.crystal-slab::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--chroma-gradient);
  opacity: 0.8;
  transition: height 0.3s ease, opacity 0.3s ease;
}

.crystal-slab:hover::before {
  height: 4px;
  opacity: 1;
}

/* 贯穿石英核心的色散微光束 (Lossless Magenta-Violet Optical Beam) */
.crystal-slab::after {
  content: "";
  position: absolute;
  top: -100%;
  left: -100%;
  width: 300%;
  height: 300%;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(236, 72, 153, 0.14) 0%, rgba(139, 92, 246, 0.08) 25%, transparent 60%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.35s ease;
}

.crystal-slab:hover::after {
  opacity: 1;
}

.crystal-slab:hover {
  border-color: rgba(236, 72, 153, 0.45);
  box-shadow: var(--quartz-shadow-hover);
}

/* 核心优势卡片网格 (3 个图文卡片) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
}

.feature-icon-wrapper {
  width: 62px;
  height: 62px;
  border-radius: var(--radius-md);
  background: var(--chroma-gradient-subtle);
  border: 1px solid rgba(139, 92, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 26px;
  color: var(--chroma-violet);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.12);
  transition: var(--transition-smooth);
}

.feature-card:hover .feature-icon-wrapper {
  background: var(--chroma-gradient);
  color: #ffffff;
  transform: scale(1.08) rotate(4deg);
  box-shadow: 0 8px 24px rgba(244, 63, 94, 0.35);
}

.feature-title {
  font-size: 1.38rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.75;
  margin-bottom: 24px;
  flex-grow: 1;
}

.feature-list {
  list-style: none;
  border-top: 1px solid var(--quartz-border);
  padding-top: 20px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.feature-list li svg {
  color: var(--badge-green);
  flex-shrink: 0;
}

/* ===================================================================
   流媒体图卡 & AI 支持图卡展示区
   =================================================================== */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-card {
  padding: 44px 38px;
}

.showcase-header {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 22px;
}

.showcase-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--chroma-gradient-subtle);
  border: 1px solid rgba(236, 72, 153, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--chroma-coral);
  box-shadow: 0 4px 16px rgba(244, 63, 94, 0.15);
  flex-shrink: 0;
}

.showcase-card h3 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-primary);
}

.showcase-subtitle-tag {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--chroma-violet);
}

.showcase-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 28px;
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-bottom: 28px;
}

.media-tag, .ai-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  background: var(--bg-quartz-slab);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  box-shadow: var(--quartz-bevel);
  transition: var(--transition-smooth);
}

.media-tag:hover, .ai-tag:hover {
  border-color: rgba(236, 72, 153, 0.5);
  background: var(--chroma-gradient-subtle);
  color: var(--chroma-coral);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(244, 63, 94, 0.16);
}

.tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--chroma-gradient);
}

.showcase-highlight {
  background: var(--bg-quartz-slab);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  font-size: 0.94rem;
  color: var(--text-secondary);
  border-left: 4px solid var(--chroma-violet);
  box-shadow: var(--quartz-bevel);
}

/* ===================================================================
   网上真实参考套餐价格对比表 (Realistic Pricing Comparison Table)
   =================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
  align-items: stretch;
}

.pricing-card {
  padding: 40px 26px;
  display: flex;
  flex-direction: column;
}

/* 热门推荐高亮卡片 - 水晶微光边框 */
.pricing-card.popular {
  border-color: rgba(236, 72, 153, 0.65);
  background: var(--bg-card-hover);
  box-shadow: 0 16px 40px -8px rgba(236, 72, 153, 0.28), var(--quartz-shadow);
  transform: scale(1.035);
  z-index: 2;
  position: relative;
}

.pricing-card.popular:hover {
  transform: scale(1.05) translateY(-4px);
}

.popular-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  background: var(--badge-popular);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.6px;
  box-shadow: 0 4px 16px rgba(244, 63, 94, 0.45);
  margin: 0 auto 16px auto;
  white-space: nowrap;
  line-height: 1.35;
}

.popular-badge .badge-spark {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 0 8px #ffffff;
  animation: pulseSpark 1.6s infinite;
  flex-shrink: 0;
}

.pricing-header {
  text-align: center;
  margin-bottom: 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--quartz-border);
}

.pricing-plan-name {
  font-size: 1.32rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.pricing-plan-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.pricing-price-wrap {
  margin: 20px 0 10px;
  display: flex;
  align-items: baseline;
  justify-content: center;
}

.price-currency {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--chroma-coral);
  margin-right: 3px;
}

.price-amount {
  font-size: 2.85rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
  letter-spacing: -1px;
}

.price-period {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-left: 5px;
}

.pricing-features-list {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.pricing-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 13px;
  line-height: 1.5;
}

.pricing-features-list li svg {
  color: var(--badge-green);
  flex-shrink: 0;
  margin-top: 3px;
}

/* ===================================================================
   用户评价 (User Reviews)
   =================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.review-card {
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
}

.review-rating {
  color: #f59e0b;
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.review-text {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
  flex-grow: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 15px;
  padding-top: 16px;
  border-top: 1px solid var(--quartz-border);
}

.author-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--chroma-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.05rem;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(236, 72, 153, 0.3);
}

.author-info h3,
.author-info h4 {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--text-primary);
}

.author-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ===================================================================
   常见问题解答 (FAQ)
   =================================================================== */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 16px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 22px 28px;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.08rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  gap: 16px;
  transition: color 0.25s ease;
}

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

.faq-arrow {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  color: var(--text-muted);
}

.faq-item.active .faq-arrow {
  transform: rotate(180deg);
  color: var(--chroma-coral);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
  padding: 0 28px;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 600px;
  padding: 0 28px 24px 28px;
  transition: max-height 0.45s ease-in-out, padding 0.3s ease;
}

/* ===================================================================
   底部行动呼吁 (Bottom CTA Banner)
   =================================================================== */
.cta-banner {
  background: var(--chroma-gradient);
  border-radius: var(--radius-lg);
  padding: 65px 44px;
  text-align: center;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 25px 60px -12px rgba(236, 72, 153, 0.45);
  margin-top: 50px;
}

.cta-banner h2 {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 16px;
  color: #ffffff;
}

.cta-banner p {
  font-size: 1.15rem;
  opacity: 0.95;
  max-width: 680px;
  margin: 0 auto 34px;
  line-height: 1.75;
}

.cta-banner .btn-white {
  background: #ffffff;
  color: var(--chroma-coral) !important;
  font-weight: 800;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.cta-banner .btn-white:hover {
  transform: translateY(-2px) scale(1.025);
  background: #fdfcff;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.28);
}

/* ===================================================================
   页脚规范 (Footer) - 严格保留 4 个指定标题
   =================================================================== */
.site-footer {
  background: var(--bg-quartz-slab);
  border-top: 1px solid var(--quartz-border);
  padding: 55px 0 38px;
  margin-top: 90px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: var(--transition-smooth);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  text-align: center;
}

.footer-four-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-four-links a {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition-smooth);
}

.footer-four-links a:hover {
  color: var(--chroma-coral);
  background: var(--chroma-gradient-subtle);
  transform: translateY(-1px);
}

.footer-divider {
  width: 100%;
  max-width: 460px;
  height: 1px;
  background: var(--quartz-border);
}

.footer-bottom-info {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-brand-highlight {
  color: var(--text-primary);
  font-weight: 700;
}

.footer-logo-img {
  height: 38px;
  width: auto;
  display: block;
  margin: 0 auto 12px;
  object-fit: contain;
  transition: opacity 0.25s ease, filter 0.3s ease;
}

[data-theme="dark"] .footer-logo-img {
  filter: drop-shadow(0 0 10px rgba(167, 139, 250, 0.4)) brightness(1.08);
}

/* ===================================================================
   资讯专栏与子页面样式 (Articles & Insights)
   =================================================================== */
.subpage-hero {
  padding: 70px 0 45px;
  text-align: center;
  border-bottom: 1px solid var(--quartz-border);
  background: var(--bg-canvas-subtle);
}

.subpage-hero h1 {
  font-size: 2.7rem;
  font-weight: 900;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.subpage-hero p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 740px;
  margin: 0 auto;
}

.subpage-content {
  padding: 65px 0;
  max-width: 900px;
  margin: 0 auto;
}

.article-card {
  padding: 48px;
  margin-bottom: 34px;
}

.article-card h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 34px 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(139, 92, 246, 0.15);
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-card h2:first-child {
  margin-top: 0;
}

.article-card h3 {
  font-size: 1.24rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 24px 0 12px;
}

.article-card p {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.85;
  margin-bottom: 18px;
}

.article-card ul, .article-card ol {
  color: var(--text-secondary);
  padding-left: 26px;
  margin-bottom: 22px;
}

.article-card li {
  margin-bottom: 12px;
  line-height: 1.75;
}

.notice-box {
  background: var(--chroma-gradient-subtle);
  border-left: 4px solid var(--chroma-violet);
  padding: 18px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 26px 0;
  font-size: 0.98rem;
  color: var(--text-primary);
}

.danger-box {
  background: rgba(244, 63, 94, 0.08);
  border-left: 4px solid #f43f5e;
  padding: 18px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 26px 0;
  font-size: 0.98rem;
  color: var(--text-primary);
}

/* 资讯推荐列表卡片 */
.insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.insight-post-card {
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
}

.insight-post-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.insight-category-badge {
  padding: 3px 12px;
  background: var(--chroma-gradient-subtle);
  color: var(--chroma-coral);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.8rem;
  border: 1px solid rgba(244, 63, 94, 0.2);
}

.insight-post-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
  line-height: 1.4;
}

.insight-post-summary {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 20px;
}

.insight-post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.post-tag {
  font-size: 0.82rem;
  padding: 4px 10px;
  background: var(--bg-quartz-slab);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

.insight-post-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

.insight-post-title a:hover {
  color: var(--chroma-coral);
}

.insight-post-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--quartz-border);
  flex-wrap: wrap;
  gap: 12px;
}

.insight-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--chroma-violet);
  transition: var(--transition-smooth);
}

.insight-read-more:hover {
  color: var(--chroma-coral);
  transform: translateX(4px);
}

/* ===================================================================
   长篇深度 SEO 文章增强排版体系
   =================================================================== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb a:hover {
  color: var(--chroma-coral);
}

.breadcrumb-separator {
  color: var(--text-muted);
  opacity: 0.6;
}

.article-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--quartz-border);
}

.article-headline {
  font-size: 2.35rem;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 18px;
  color: var(--text-primary);
  letter-spacing: -0.6px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

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

/* 目录引导晶体盒 (Table of Contents) */
.toc-box {
  background: var(--bg-quartz-slab);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 28px 0 36px;
  box-shadow: var(--quartz-bevel);
}

.toc-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.toc-list li a {
  color: var(--text-secondary);
  font-size: 0.96rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition-smooth);
}

.toc-list li a:hover {
  color: var(--chroma-coral);
  transform: translateX(4px);
}

.toc-num {
  font-size: 0.82rem;
  color: var(--chroma-violet);
  font-weight: 800;
}

/* 文章内部内链推荐卡片 (Article CTA Box) */
.article-cta-box {
  background: var(--chroma-gradient-subtle);
  border: 1px solid rgba(236, 72, 153, 0.35);
  border-radius: var(--radius-md);
  padding: 30px;
  margin: 40px 0;
  text-align: center;
  box-shadow: var(--quartz-bevel), 0 8px 25px rgba(244, 63, 94, 0.12);
}

.article-cta-box h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.article-cta-box p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  margin-bottom: 20px;
  line-height: 1.65;
}

/* 文章内部专属 FAQ 模块 */
.article-faq-section {
  margin: 50px 0 30px;
  padding-top: 30px;
  border-top: 1px solid var(--quartz-border);
}

.article-faq-section h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-faq-card {
  background: var(--bg-quartz-slab);
  border: 1px solid var(--quartz-border);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  margin-bottom: 16px;
  box-shadow: var(--quartz-bevel);
}

.article-faq-q {
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.article-faq-q svg {
  color: var(--chroma-coral);
  flex-shrink: 0;
  margin-top: 3px;
}

.article-faq-a {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.8;
  padding-left: 28px;
}

/* 相关阅读推荐模块 (Related Reading) */
.related-reading-section {
  margin-top: 55px;
  padding-top: 35px;
  border-top: 2px dashed var(--quartz-border);
}

.related-reading-section h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.related-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.related-card h4 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.5;
  transition: var(--transition-smooth);
}

.related-card:hover h4 {
  color: var(--chroma-coral);
}

.related-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
  flex-grow: 1;
}

.related-card .read-link {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--chroma-violet);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.related-card:hover .read-link {
  color: var(--chroma-coral);
  transform: translateX(4px);
}

@media (max-width: 768px) {
  .related-reading-grid {
    grid-template-columns: 1fr;
  }
  .article-headline {
    font-size: 1.85rem;
  }
}

/* 网站地图网格 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.sitemap-card {
  padding: 28px;
}

.sitemap-card.full-width {
  grid-column: 1 / -1;
}

.sitemap-card h3 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--chroma-violet);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sitemap-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sitemap-card li {
  margin-bottom: 12px;
}

.sitemap-card a {
  color: var(--text-secondary);
  font-size: 0.98rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.sitemap-card a:hover {
  color: var(--chroma-coral);
  transform: translateX(4px);
}

/* ===================================================================
   响应式断点 (@media queries) - 手机端单栏与大触控适配
   =================================================================== */
@media (max-width: 1120px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 26px;
  }
  .pricing-card.popular {
    transform: none;
  }
  .pricing-card.popular:hover {
    transform: translateY(-4px);
  }
}

@media (max-width: 960px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
  .showcase-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.85rem;
  }
}

@media (max-width: 820px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    padding: 26px 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid var(--quartz-border);
    gap: 18px;
    text-align: center;
  }

  .nav-links.active {
    display: flex;
  }

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

  .hero-title {
    font-size: 2.35rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .hero-trust-bar {
    gap: 20px;
    justify-content: flex-start;
    padding: 20px;
  }

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

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

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

  .article-card {
    padding: 30px 22px;
  }

  .subpage-hero h1 {
    font-size: 2.15rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 18px;
  }

  .hero-title {
    font-size: 2.05rem;
  }

  .btn {
    min-height: 50px;
    padding: 13px 22px;
    font-size: 0.98rem;
  }

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

  .hero-cta-group .btn {
    width: 100%;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .showcase-card, .feature-card, .pricing-card {
    padding: 28px 20px;
  }
}